Patent Publication Number: US-2022232345-A1

Title: Modifying consistency groups associated with positioning of a user equipment

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present Application for Patent claims the benefit of U.S. Provisional Application No. 63/137,839, entitled “MODIFYING CONSISTENCY GROUPS ASSOCIATED WITH POSITIONING OF A USER EQUIPMENT,” filed Jan. 15, 2021, assigned to the assignee hereof, and expressly incorporated herein by reference in its entirety. 
    
    
     BACKGROUND OF THE DISCLOSURE 
     1. Field of the Disclosure 
     Aspects of the disclosure relate generally to wireless communications, and more particularly to modifying consistency groups associated with positioning of a user equipment (UE). 
     2. Description of the Related Art 
     Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G), a second-generation (2G) digital wireless phone service (including interim 2.5G and 2.75G networks), a third-generation (3G) high speed data, Internet-capable wireless service and a fourth-generation (4G) service (e.g., Long Term Evolution (LTE) or WiMax). There are presently many different types of wireless communication systems in use, including cellular and personal communications service (PCS) systems. Examples of known cellular systems include the cellular analog advanced mobile phone system (AMPS), and digital cellular systems based on code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), the Global System for Mobile communication (GSM), etc. 
     A fifth generation (5G) wireless standard, referred to as New Radio (NR), calls for higher data transfer speeds, greater numbers of connections, and better coverage, among other improvements. The 5G standard, according to the Next Generation Mobile Networks Alliance, is designed to provide data rates of several tens of megabits per second to each of tens of thousands of users, with 1 gigabit per second to tens of workers on an office floor. Several hundreds of thousands of simultaneous connections should be supported  in order to support large sensor deployments. Consequently, the spectral efficiency of 5G mobile communications should be significantly enhanced compared to the current 4G standard. Furthermore, signaling efficiencies should be enhanced and latency should be substantially reduced compared to current standards. 
     SUMMARY 
     The following presents a simplified summary relating to one or more aspects disclosed herein. Thus, the following summary should not be considered an extensive overview relating to all contemplated aspects, nor should the following summary be considered to identify key or critical elements relating to all contemplated aspects or to delineate the scope associated with any particular aspect. Accordingly, the following summary has the sole purpose to present certain concepts relating to one or more aspects relating to the mechanisms disclosed herein in a simplified form to precede the detailed description presented below. 
     In an aspect, a method of operating a user equipment (UE) includes identifying, by the UE, a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; reporting, to a position estimation entity, information associated with the plurality of consistency groups; and receiving, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     In an aspect, a method of operating a network component includes receiving, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; and transmitting, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     In an aspect, a user equipment (UE) includes a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to: identify a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; report, to a position estimation entity, information  associated with the plurality of consistency groups; and receive, via the at least one transceiver, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     In an aspect, a network component includes a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to: receive, via the at least one transceiver, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; and transmit, via the at least one transceiver, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     In an aspect, a user equipment (UE) includes means for identifying a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; means for reporting, to a position estimation entity, information associated with the plurality of consistency groups; and means for receiving, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     In an aspect, a network component includes means for receiving, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; and means for transmitting, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     In an aspect, a non-transitory computer-readable medium storing computer-executable instructions that, when executed by a user equipment (UE), cause the UE to: identify a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; report, to a position estimation entity, information associated with the plurality of consistency groups; and receive, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups.  
     In an aspect, a non-transitory computer-readable medium storing computer-executable instructions that, when executed by a network component, cause the network component to: receive, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; and transmit, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Other objects and advantages associated with the aspects disclosed herein will be apparent to those skilled in the art based on the accompanying drawings and detailed description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are presented to aid in the description of examples of one or more aspects of the disclosed subject matter and are provided solely for illustration of the examples and not limitation thereof: 
         FIG. 1  illustrates an exemplary wireless communications system, according to various aspects. 
         FIGS. 2A and 2B  illustrate example wireless network structures, according to various aspects. 
         FIGS. 3A to 3C  are simplified block diagrams of several sample aspects of components that may be employed in wireless communication nodes and configured to support communication as taught herein. 
         FIGS. 4A and 4B  are diagrams illustrating example frame structures and channels within the frame structures, according to aspects of the disclosure. 
         FIG. 5  is a diagram illustrating how a non-line-of-sight (NLOS) positioning signal can cause a user equipment (UE) to miscalculate its position. 
         FIG. 6  is a flow chart showing a conventional method for outlier detection. 
         FIG. 7  illustrates a method of wireless communication according to some aspects of the disclosure. 
         FIGS. 8, 9A, and 9B  are flowcharts illustrating partial methods of wireless communication according to some aspects of the disclosure. 
         FIG. 10  illustrates an example result of methods of wireless communication according to some aspects of the disclosure.  
         FIGS. 11 and 12  are flowcharts illustrating methods of wireless communication according to some aspects of the disclosure. 
         FIG. 13  is a diagram showing exemplary timings of RTT measurement signals exchanged between a base station (e.g., any of the base stations described herein) and a UE (e.g., any of the UEs described herein), according to aspects of the disclosure. 
         FIG. 14  illustrates a diagram showing exemplary timings of RTT measurement signals exchanged between a base station (gNB) (e.g., any of the base stations described herein) and a UE (e.g., any of the UEs described herein), according to aspects of the disclosure. 
         FIG. 15  illustrates an exemplary process of wireless communication, according to aspects of the disclosure. 
         FIG. 16  illustrates an exemplary process of wireless communication, according to aspects of the disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Aspects of the disclosure are provided in the following description and related drawings directed to various examples provided for illustration purposes. Alternate aspects may be devised without departing from the scope of the disclosure. Additionally, well-known elements of the disclosure will not be described in detail or will be omitted so as not to obscure the relevant details of the disclosure. 
     To overcome the technical disadvantages of conventional systems and methods described above, mechanisms by which the bandwidth used by a user equipment (UE) for positioning reference signal (PRS) can be dynamically adjusted, e.g., response to environmental conditions, are presented. For example, a UE receiver may indicate to a transmitting entity a condition of the environment in which the UE is operating, and in response the transmitting entity may adjust the PRS bandwidth. 
     The words “exemplary” and “example” are used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” or “example” is not necessarily to be construed as preferred or advantageous over other aspects. Likewise, the term “aspects of the disclosure” does not require that all aspects of the disclosure include the discussed feature, advantage or mode of operation. 
     Those of skill in the art will appreciate that the information and signals described below may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that  may be referenced throughout the description below may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof, depending in part on the particular application, in part on the desired design, in part on the corresponding technology, etc. 
     Further, many aspects are described in terms of sequences of actions to be performed by, for example, elements of a computing device. It will be recognized that various actions described herein can be performed by specific circuits (e.g., application specific integrated circuits (ASICs)), by program instructions being executed by one or more processors, or by a combination of both. Additionally, the sequence(s) of actions described herein can be considered to be embodied entirely within any form of non-transitory computer-readable storage medium having stored therein a corresponding set of computer instructions that, upon execution, would cause or instruct an associated processor of a device to perform the functionality described herein. Thus, the various aspects of the disclosure may be embodied in a number of different forms, all of which have been contemplated to be within the scope of the claimed subject matter. In addition, for each of the aspects described herein, the corresponding form of any such aspects may be described herein as, for example, “logic configured to” perform the described action. 
     As used herein, the terms “user equipment” (UE) and “base station” are not intended to be specific or otherwise limited to any particular radio access technology (RAT), unless otherwise noted. In general, a UE may be any wireless communication device (e.g., a mobile phone, router, tablet computer, laptop computer, tracking device, wearable (e.g., smartwatch, glasses, augmented reality (AR)/virtual reality (VR) headset, etc.), vehicle (e.g., automobile, motorcycle, bicycle, etc.), Internet of Things (IoT) device, etc.) used by a user to communicate over a wireless communications network. A UE may be mobile or may (e.g., at certain times) be stationary, and may communicate with a radio access network (RAN). As used herein, the term “UE” may be referred to interchangeably as an “access terminal” or “AT,” a “client device,” a “wireless device,” a “subscriber device,” a “subscriber terminal,” a “subscriber station,” a “user terminal” (UT), a “mobile device,” a “mobile terminal,” a “mobile station,” or variations thereof. Generally, UEs can communicate with a core network via a RAN, and through the core network the UEs can be connected with external networks such as the Internet and with other UEs. Of course, other mechanisms of connecting to the core network, to the Internet, or to both are also  possible for the UEs, such as over wired access networks, wireless local area network (WLAN) networks (e.g., based on IEEE 802.11, etc.) and so on. 
     A base station may operate according to one of several RATs in communication with UEs depending on the network in which it is deployed, and may be alternatively referred to as an access point (AP), a network node, a NodeB, an evolved NodeB (eNB), a next generation eNB (ng-eNB), a New Radio (NR) Node B (also referred to as a gNB or gNodeB), etc. A base station may be used primarily to support wireless access by UEs, including supporting data, voice, signaling connections, or various combinations thereof for the supported UEs. In some systems a base station may provide purely edge node signaling functions while in other systems it may provide additional control functions, network management functions, or both. A communication link through which UEs can send signals to a base station is called an uplink (UL) channel (e.g., a reverse traffic channel, a reverse control channel, an access channel, etc.). A communication link through which the base station can send signals to UEs is called a downlink (DL) or forward link channel (e.g., a paging channel, a control channel, a broadcast channel, a forward traffic channel, etc.). As used herein the term traffic channel (TCH) can refer to either an uplink/reverse or downlink/forward traffic channel. 
     The term “base station” may refer to a single physical transmission-reception point (TRP) or to multiple physical TRPs that may or may not be co-located. For example, where the term “base station” refers to a single physical TRP, the physical TRP may be an antenna of the base station corresponding to a cell (or several cell sectors) of the base station. Where the term “base station” refers to multiple co-located physical TRPs, the physical TRPs may be an array of antennas (e.g., as in a multiple-input multiple-output (MIMO) system or where the base station employs beamforming) of the base station. Where the term “base station” refers to multiple non-co-located physical TRPs, the physical TRPs may be a distributed antenna system (DAS) (a network of spatially separated antennas connected to a common source via a transport medium) or a remote radio head (RRH) (a remote base station connected to a serving base station). Alternatively, the non-co-located physical TRPs may be the serving base station receiving the measurement report from the UE and a neighbor base station whose reference radio frequency (RF) signals (or simply “reference signals”) the UE is measuring. Because a TRP is the point from which a base station transmits and receives wireless signals, as used herein, references to transmission  from or reception at a base station are to be understood as referring to a particular TRP of the base station. 
     In some implementations that support positioning of UEs, a base station may not support wireless access by UEs (e.g., may not support data, voice, signaling connections, or various combinations thereof for UEs), but may instead transmit reference signals to UEs to be measured by the UEs, may receive and measure signals transmitted by the UEs, or both. Such a base station may be referred to as a positioning beacon (e.g., when transmitting signals to UEs), as a location measurement unit (e.g., when receiving and measuring signals from UEs), or both. 
     An “RF signal” comprises an electromagnetic wave of a given frequency that transports information through the space between a transmitter and a receiver. As used herein, a transmitter may transmit a single “RF signal” or multiple “RF signals” to a receiver. However, the receiver may receive multiple “RF signals” corresponding to each transmitted RF signal due to the propagation characteristics of RF signals through multipath channels. The same transmitted RF signal on different paths between the transmitter and receiver may be referred to as a “multipath” RF signal. As used herein, an RF signal may also be referred to as a “wireless signal” or simply a “signal” where it is clear from the context that the term “signal” refers to a wireless signal or an RF signal. 
       FIG. 1  illustrates an exemplary wireless communications system  100  according to various aspects. The wireless communications system  100  (which may also be referred to as a wireless wide area network (WWAN)) may include various base stations  102  and various UEs  104 . The base stations  102  may include macro cell base stations (high power cellular base stations), small cell base stations (low power cellular base stations), or both. In an aspect, the macro cell base station may include eNBs, ng-eNBs, or both, where the wireless communications system  100  corresponds to an LTE network, or gNBs where the wireless communications system  100  corresponds to a NR network, or a combination of both, and the small cell base stations may include femtocells, picocells, microcells, etc. 
     The base stations  102  may collectively form a radio access network (RAN)  106  and interface with a core network  108  (e.g., an evolved packet core (EPC) or a 5G core (5GC)) through backhaul links  110 , and through the core network  108  to one or more location servers  112  (which may be part of core network  108  or may be external to core network  108 ). In addition to other functions, the base stations  102  may perform functions that relate to one or more of transferring user data, radio channel ciphering and deciphering,  integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, RAN sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations  102  may communicate with each other directly or indirectly (e.g., through the EPC/5GC) over backhaul links  114 , which may be wired or wireless. 
     The base stations  102  may wirelessly communicate with the UEs  104 . Each of the base stations  102  may provide communication coverage for a respective geographic coverage area  116 . In an aspect, one or more cells may be supported by a base station  102  in each geographic coverage area  116 . A “cell” is a logical communication entity used for communication with a base station (e.g., over some frequency resource, referred to as a carrier frequency, component carrier, carrier, band, or the like), and may be associated with an identifier (e.g., a physical cell identifier (PCI), a virtual cell identifier (VCI), a cell global identifier (CGI)) for distinguishing cells operating via the same or a different carrier frequency. In some cases, different cells may be configured according to different protocol types (e.g., machine-type communication (MTC), narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access for different types of UEs. Because a cell is supported by a specific base station, the term “cell” may refer to either or both of the logical communication entity and the base station that supports it, depending on the context. In addition, because a TRP is typically the physical transmission point of a cell, the terms “cell” and “TRP” may be used interchangeably. In some cases, the term “cell” may also refer to a geographic coverage area of a base station (e.g., a sector), insofar as a carrier frequency can be detected and used for communication within some portion of geographic coverage areas  116 . 
     While neighboring macro cell base station  102  geographic coverage areas  116  may partially overlap (e.g., in a handover region), some of the geographic coverage areas  116  may be substantially overlapped by a larger geographic coverage area  116 . For example, a small cell base station  102 ′ may have a coverage area  116 ′ that substantially overlaps with the geographic coverage area  116  of one or more macro cell base stations  102 . A network that includes both small cell and macro cell base stations may be known as a heterogeneous network. A heterogeneous network may also include home eNBs  (HeNBs), which may provide service to a restricted group known as a closed subscriber group (CSG). 
     The communication links  118  between the base stations  102  and the UEs  104  may include uplink (also referred to as reverse link) transmissions from a UE  104  to a base station  102 , downlink (also referred to as forward link) transmissions from a base station  102  to a UE  104 , or both. The communication links  118  may use MIMO antenna technology, including spatial multiplexing, beamforming, transmit diversity, or various combinations thereof. The communication links  118  may be through one or more carrier frequencies. Allocation of carriers may be asymmetric with respect to downlink and uplink (e.g., more or less carriers may be allocated for downlink than for uplink). 
     The wireless communications system  100  may further include a wireless local area network (WLAN) access point (AP)  120  in communication with WLAN stations (STAs)  122  via communication links  124  in an unlicensed frequency spectrum (e.g., 5 GHz). When communicating in an unlicensed frequency spectrum, the WLAN STAs  122 , the WLAN AP  120 , or various combinations thereof may perform a clear channel assessment (CCA) or listen before talk (LBT) procedure prior to communicating in order to determine whether the channel is available. 
     The small cell base station  102 ′ may operate in a licensed, an unlicensed frequency spectrum, or both. When operating in an unlicensed frequency spectrum, the small cell base station  102 ′ may employ LTE or NR technology and use the same 5 GHz unlicensed frequency spectrum as used by the WLAN AP  120 . The small cell base station  102 ′, employing LTE/5G in an unlicensed frequency spectrum, may boost coverage to the access network, increase capacity of the access network, or both. NR in unlicensed spectrum may be referred to as NR-U. LTE in an unlicensed spectrum may be referred to as LTE-U, licensed assisted access (LAA), or MulteFire. 
     The wireless communications system  100  may further include a millimeter wave (mmW) base station  126  that may operate in mmW frequencies, in near mmW frequencies, or combinations thereof in communication with a UE  128 . Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in this band may be referred to as a millimeter wave. Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using  the mmW/near mmW radio frequency band have high path loss and a relatively short range. The mmW base station  126  and the UE  128  may utilize beamforming (transmit, receive, or both) over a mmW communication link  130  to compensate for the extremely high path loss and short range. Further, it will be appreciated that in alternative configurations, one or more base stations  102  may also transmit using mmW or near mmW and beamforming. Accordingly, it will be appreciated that the foregoing illustrations are merely examples and should not be construed to limit the various aspects disclosed herein. 
     Transmit beamforming is a technique for focusing an RF signal in a specific direction. Traditionally, when a network node (e.g., a base station) broadcasts an RF signal, it broadcasts the signal in all directions (omni-directionally). With transmit beamforming, the network node determines where a given target device (e.g., a UE) is located (relative to the transmitting network node) and projects a stronger downlink RF signal in that specific direction, thereby providing a faster (in terms of data rate) and stronger RF signal for the receiving device(s). To change the directionality of the RF signal when transmitting, a network node can control the phase and relative amplitude of the RF signal at each of the one or more transmitters that are broadcasting the RF signal. For example, a network node may use an array of antennas (referred to as a “phased array” or an “antenna array”) that creates a beam of RF waves that can be “steered” to point in different directions, without actually moving the antennas. Specifically, the RF current from the transmitter is fed to the individual antennas with the correct phase relationship so that the radio waves from the separate antennas add together to increase the radiation in a desired direction, while canceling to suppress radiation in undesired directions. 
     Transmit beams may be quasi-collocated, meaning that they appear to the receiver (e.g., a UE) as having the same parameters, regardless of whether or not the transmitting antennas of the network node themselves are physically collocated. In NR, there are four types of quasi-collocation (QCL) relations. Specifically, a QCL relation of a given type means that certain parameters about a second reference RF signal on a second beam can be derived from information about a source reference RF signal on a source beam. Thus, if the source reference RF signal is QCL Type A, the receiver can use the source reference RF signal to estimate the Doppler shift, Doppler spread, average delay, and delay spread of a second reference RF signal transmitted on the same channel. If the source reference RF signal is QCL Type B, the receiver can use the source reference RF signal to estimate  the Doppler shift and Doppler spread of a second reference RF signal transmitted on the same channel. If the source reference RF signal is QCL Type C, the receiver can use the source reference RF signal to estimate the Doppler shift and average delay of a second reference RF signal transmitted on the same channel. If the source reference RF signal is QCL Type D, the receiver can use the source reference RF signal to estimate the spatial receive parameter of a second reference RF signal transmitted on the same channel. 
     In receive beamforming, the receiver uses a receive beam to amplify RF signals detected on a given channel. For example, the receiver can increase the gain setting, adjust the phase setting, or combinations thereof, of an array of antennas in a particular direction to amplify (e.g., to increase the gain level of) the RF signals received from that direction. Thus, when a receiver is said to beamform in a certain direction, it means the beam gain in that direction is high relative to the beam gain along other directions, or the beam gain in that direction is the highest compared to the beam gain in that direction of all other receive beams available to the receiver. This results in a stronger received signal strength (e.g., reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), etc.) of the RF signals received from that direction. 
     Receive beams may be spatially related. A spatial relation means that parameters for a transmit beam for a second reference signal can be derived from information about a receive beam for a first reference signal. For example, a UE may use a particular receive beam to receive one or more reference downlink reference signals (e.g., positioning reference signals (PRS), narrowband reference signals (NRS) tracking reference signals (TRS), phase tracking reference signal (PTRS), cell-specific reference signals (CRS), channel state information reference signals (CSI-RS), primary synchronization signals (PSS), secondary synchronization signals (SSS), synchronization signal blocks (SSBs), etc.) from a base station. The UE can then form a transmit beam for sending one or more uplink reference signals (e.g., uplink positioning reference signals (UL-PRS), sounding reference signal (SRS), demodulation reference signals (DMRS), PTRS, etc.) to that base station based on the parameters of the receive beam. 
     Note that a “downlink” beam may be either a transmit beam or a receive beam, depending on the entity forming it. For example, if a base station is forming the downlink beam to transmit a reference signal to a UE, the downlink beam is a transmit beam. If the UE is forming the downlink beam, however, it is a receive beam to receive the downlink  reference signal. Similarly, an “uplink” beam may be either a transmit beam or a receive beam, depending on the entity forming it. For example, if a base station is forming the uplink beam, it is an uplink receive beam, and if a UE is forming the uplink beam, it is an uplink transmit beam. 
     In 5G, the frequency spectrum in which wireless nodes (e.g., base stations  102 / 126 , UEs  104 / 128 ) operate is divided into multiple frequency ranges, FR1 (from 450 to 6000 MHz), FR2 (from 24250 to 52600 MHz), FR3 (above 52600 MHz), and FR4 (between FR1 and FR2). In a multi-carrier system, such as 5G, one of the carrier frequencies is referred to as the “primary carrier” or “anchor carrier” or “primary serving cell” or “PCell,” and the remaining carrier frequencies are referred to as “secondary carriers” or “secondary serving cells” or “SCells.” In carrier aggregation, the anchor carrier is the carrier operating on the primary frequency (e.g., FR1) utilized by a UE  104 / 128  and the cell in which the UE  104 / 128  either performs the initial radio resource control (RRC) connection establishment procedure or initiates the RRC connection re-establishment procedure. The primary carrier carries all common and UE-specific control channels and may be a carrier in a licensed frequency (however, this is not always the case). A secondary carrier is a carrier operating on a second frequency (e.g., FR2) that may be configured once the RRC connection is established between the UE  104  and the anchor carrier and that may be used to provide additional radio resources. In some cases, the secondary carrier may be a carrier in an unlicensed frequency. The secondary carrier may contain only necessary signaling information and signals, for example, those that are UE-specific may not be present in the secondary carrier, since both primary uplink and downlink carriers are typically UE-specific. This means that different UEs  104 / 128  in a cell may have different downlink primary carriers. The same is true for the uplink primary carriers. The network is able to change the primary carrier of any UE  104 / 128  at any time. This is done, for example, to balance the load on different carriers. Because a “serving cell” (whether a PCell or an SCell) corresponds to a carrier frequency/component carrier over which some base station is communicating, the term “cell,” “serving cell,” “component carrier,” “carrier frequency,” and the like can be used interchangeably. 
     For example, still referring to  FIG. 1 , one of the frequencies utilized by the macro cell base stations  102  may be an anchor carrier (or “PCell”) and other frequencies utilized by the macro cell base stations  102 , the mmW base station  126 , or combinations thereof may be secondary carriers (“SCells”). The simultaneous transmission, reception, or both of  multiple carriers enables the UE  104 / 128  to significantly increase its data transmission rates, reception rates, or both. For example, two 20 MHz aggregated carriers in a multi-carrier system would theoretically lead to a two-fold increase in data rate (i.e., 40 MHz), compared to that attained by a single 20 MHz carrier. 
     The wireless communications system  100  may further include one or more UEs, such as UE  132 , that connects indirectly to one or more communication networks via one or more device-to-device (D2D) peer-to-peer (P2P) links (referred to as “sidelinks”). In the example of  FIG. 1 , UE  132  has a D2D P2P link  134  with one of the UEs  104  connected to one of the base stations  102  (e.g., through which UE  132  may indirectly obtain cellular connectivity) and a D2D P2P link  194  with WLAN STA  122  connected to the WLAN AP  120  (through which UE  132  may indirectly obtain WLAN-based Internet connectivity). In an example, the D2D P2P link  134  and P2P link  136  may be supported with any well-known D2D RAT, such as LTE Direct (LTE-D), WiFi Direct (WiFi-D), Bluetooth®, and so on. 
     The wireless communications system  100  may further include a UE  138  that may communicate with a macro cell base station  102  over a communication link  118 , with the mmW base station  126  over a mmW communication link  130 , or combinations thereof. For example, the macro cell base station  102  may support a PCell and one or more SCells for the UE  138  and the mmW base station  126  may support one or more SCells for the UE  138 . 
       FIG. 2A  illustrates an example wireless network structure  200  according to various aspects. For example, a 5GC  210  (also referred to as a Next Generation Core (NGC)) can be viewed functionally as control plane functions  214  (e.g., UE registration, authentication, network access, gateway selection, etc.) and user plane functions  212 , (e.g., UE gateway function, access to data networks, IP routing, etc.) which operate cooperatively to form the core network. User plane interface (NG-U)  213  and control plane interface (NG-C)  215  connect the gNB  222  to the 5GC  210  and specifically to the control plane functions  214  and user plane functions  212 . In an additional configuration, an ng-eNB  224  may also be connected to the 5GC  210  via NG-C  215  to the control plane functions  214  and NG-U  213  to user plane functions  212 . Further, ng-eNB  224  may directly communicate with gNB  222  via a backhaul connection  223 . In some configurations, the New RAN  220  may only have one or more gNBs  222 , while other configurations include one or more of both ng-eNBs  224  and gNBs  222 . Either gNB  222   or ng-eNB  224  may communicate with UEs  204  (e.g., any of the UEs depicted in  FIG. 1 ). Another optional aspect may include a location server  112 , which may be in communication with the 5GC  210  to provide location assistance for UEs  204 . The location server  112  can be implemented as a plurality of separate servers (e.g., physically separate servers, different software modules on a single server, different software modules spread across multiple physical servers, etc.), or alternately may each correspond to a single server. The location server  112  can be configured to support one or more location services for UEs  204  that can connect to the location server  112  via the core network, 5GC  210 , via the Internet (not illustrated), or via both. Further, the location server  112  may be integrated into a component of the core network, or alternatively may be external to the core network. 
       FIG. 2B  illustrates another example wireless network structure  250  according to various aspects. For example, a 5GC  260  can be viewed functionally as control plane functions, provided by an access and mobility management function (AMF)  264 , and user plane functions, provided by a user plane function (UPF)  262 , which operate cooperatively to form the core network (i.e., 5GC  260 ). User plane interface  263  and control plane interface  265  connect the ng-eNB  224  to the 5GC  260  and specifically to UPF  262  and AMF  264 , respectively. In an additional configuration, a gNB  222  may also be connected to the 5GC  260  via control plane interface  265  to AMF  264  and user plane interface  263  to UPF  262 . Further, ng-eNB  224  may directly communicate with gNB  222  via the backhaul connection  223 , with or without gNB direct connectivity to the 5GC  260 . In some configurations, the New RAN  220  may only have one or more gNBs  222 , while other configurations include one or more of both ng-eNBs  224  and gNBs  222 . Either gNB  222  or ng-eNB  224  may communicate with UEs  204  (e.g., any of the UEs depicted in  FIG. 1 ). The base stations of the New RAN  220  communicate with the AMF  264  over the N2 interface and with the UPF  262  over the N3 interface. 
     The functions of the AMF  264  include registration management, connection management, reachability management, mobility management, lawful interception, transport for session management (SM) messages between the UE  204  and a session management function (SMF)  266 , transparent proxy services for routing SM messages, access authentication and access authorization, transport for short message service (SMS) messages between the UE  204  and the short message service function (SMSF) (not shown), and security anchor functionality (SEAF). The AMF  264  also interacts with an  authentication server function (AUSF) (not shown) and the UE  204 , and receives the intermediate key that was established as a result of the UE  204  authentication process. In the case of authentication based on a UMTS (universal mobile telecommunications system) subscriber identity module (USIM), the AMF  264  retrieves the security material from the AUSF. The functions of the AMF  264  also include security context management (SCM). The SCM receives a key from the SEAF that it uses to derive access-network specific keys. The functionality of the AMF  264  also includes location services management for regulatory services, transport for location services messages between the UE  204  and a location management function (LMF)  270  (which acts as a location server  112 ), transport for location services messages between the New RAN  220  and the LMF  270 , evolved packet system (EPS) bearer identifier allocation for interworking with the EPS, and UE  204  mobility event notification. In addition, the AMF  264  also supports functionalities for non-3GPP access networks. 
     Functions of the UPF  262  include acting as an anchor point for intra-/inter-RAT mobility (when applicable), acting as an external protocol data unit (PDU) session point of interconnect to a data network (not shown), providing packet routing and forwarding, packet inspection, user plane policy rule enforcement (e.g., gating, redirection, traffic steering), lawful interception (user plane collection), traffic usage reporting, quality of service (QoS) handling for the user plane (e.g., uplink/downlink rate enforcement, reflective QoS marking in the downlink), uplink traffic verification (service data flow (SDF) to QoS flow mapping), transport level packet marking in the uplink and downlink, downlink packet buffering and downlink data notification triggering, and sending and forwarding of one or more “end markers” to the source RAN node. The UPF  262  may also support transfer of location services messages over a user plane between the UE  204  and a location server, such as a secure user plane location (SUPL) location platform (SLP)  272 . 
     The functions of the SMF  266  include session management, UE Internet protocol (IP) address allocation and management, selection and control of user plane functions, configuration of traffic steering at the UPF  262  to route traffic to the proper destination, control of part of policy enforcement and QoS, and downlink data notification. The interface over which the SMF  266  communicates with the AMF  264  is referred to as the N11 interface.  
     Another optional aspect may include an LMF  270 , which may be in communication with the 5GC  260  to provide location assistance for UEs  204 . The LMF  270  can be implemented as a plurality of separate servers (e.g., physically separate servers, different software modules on a single server, different software modules spread across multiple physical servers, etc.), or alternately may each correspond to a single server. The LMF  270  can be configured to support one or more location services for UEs  204  that can connect to the LMF  270  via the core network, 5GC  260 , via the Internet (not illustrated), or via both. The SLP  272  may support similar functions to the LMF  270 , but whereas the LMF  270  may communicate with the AMF  264 , New RAN  220 , and UEs  204  over a control plane (e.g., using interfaces and protocols intended to convey signaling messages and not voice or data), the SLP  272  may communicate with UEs  204  and external clients (not shown in  FIG. 2B ) over a user plane (e.g., using protocols intended to carry voice or data like the transmission control protocol (TCP) and/or IP). 
     In an aspect, the LMF  270 , the SLP  272 , or both may be integrated into a base station, such as the gNB  222  or the ng-eNB  224 . When integrated into the gNB  222  or the ng-eNB  224 , the LMF  270  or the SLP  272  may be referred to as a location management component (LMC). However, as used herein, references to the LMF  270  and the SLP  272  include both the case in which the LMF  270  and the SLP  272  are components of the core network (e.g., 5GC  260 ) and the case in which the LMF  270  and the SLP  272  are components of a base station. 
       FIGS. 3A, 3B, and 3C  illustrate several exemplary components (represented by corresponding blocks) that may be incorporated into a UE  302  (which may correspond to any of the UEs described herein), a base station  304  (which may correspond to any of the base stations described herein), and a network entity  306  (which may correspond to or embody any of the network functions described herein, including the location server  112  and the LMF  270 ) to support the file transmission operations as taught herein. It will be appreciated that these components may be implemented in different types of apparatuses in different implementations (e.g., in an ASIC, in a system-on-chip (SoC), etc.). The illustrated components may also be incorporated into other apparatuses in a communication system. For example, other apparatuses in a system may include components similar to those described to provide similar functionality. Also, a given apparatus may contain one or more of the components. For example, an apparatus may  include multiple transceiver components that enable the apparatus to operate on multiple carriers, communicate via different technologies, or both. 
     The UE  302  and the base station  304  each include wireless wide area network (WWAN) transceiver, such as WWAN transceiver  310  and WWAN transceiver  350 , respectively, configured to communicate via one or more wireless communication networks (not shown), such as an NR network, an LTE network, a GSM network, or the like. The WWAN transceivers  310  and  350  may be connected to one or more antennas, such as antenna  316  and antenna  356 , respectively, for communicating with other network nodes, such as other UEs, access points, base stations (e.g., eNBs, gNBs), etc., via at least one designated RAT (e.g., NR, LTE, GSM, etc.) over a wireless communication medium of interest (e.g., some set of time/frequency resources in a particular frequency spectrum). The WWAN transceivers  310  and  350  may be variously configured for transmitting and encoding signal  318  and signal  358  (e.g., messages, indications, information, and so on), respectively, and, conversely, for receiving and decoding signals (e.g., messages, indications, information, pilots, and so on), such as signal  318  and signal  358 , respectively, in accordance with the designated RAT. Specifically, the WWAN transceivers  310  and  350  include one or more transmitters, such as transmitter  314  and transmitter  354 , respectively, for transmitting and encoding signals  318  and  358 , respectively, and one or more receivers, such as receiver  312  and receiver  352 , respectively, for receiving and decoding signals  318  and  358 , respectively. 
     The UE  302  and the base station  304  also include, at least in some cases, wireless local area network (WLAN) transceiver  320  and WLAN transceiver  360 , respectively. The WLAN transceivers  320  and  360  may be connected to one or more antennas, such as antenna  326  and antenna  366 , respectively, for communicating with other network nodes, such as other UEs, access points, base stations, etc., via at least one designated RAT (e.g., WiFi, LTE-D, Bluetooth®, etc.) over a wireless communication medium of interest. The WLAN transceivers  320  and  360  may be variously configured for transmitting and encoding signals (e.g., messages, indications, information, and so on), such as signal  328  and signal  368 , respectively, and, conversely, for receiving and decoding signals, such as signal  328  and signal  368 , respectively, in accordance with the designated RAT. Specifically, the WLAN transceivers  320  and  360  include one or more transmitters, such as transmitter  324  and transmitter  364 , respectively, for transmitting and encoding signals, such as signals  328  and  368 , respectively, and one or more receivers, such as  receiver  322  and receiver  362 , respectively, for receiving and decoding signals  328  and  368 , respectively. 
     Transceiver circuitry including at least one transmitter and at least one receiver may comprise an integrated device (e.g., embodied as a transmitter circuit and a receiver circuit of a single communication device) in some implementations, may comprise a separate transmitter device and a separate receiver device in some implementations, or may be embodied in other ways in other implementations. In an aspect, a transmitter may include or be coupled to a plurality of antennas (e.g., antennas  316 ,  326 ,  356 ,  366 ), such as an antenna array, that permits the respective apparatus to perform transmit “beamforming,” as described herein. Similarly, a receiver may include or be coupled to a plurality of antennas (e.g., antennas  316 ,  326 ,  356 ,  366 ), such as an antenna array, that permits the respective apparatus to perform receive beamforming, as described herein. In an aspect, the transmitter and receiver may share the same plurality of antennas (e.g., antennas  316 ,  326 ,  356 ,  366 ), such that the respective apparatus can only receive or transmit at a given time, not both at the same time. A wireless communication device (e.g., one or both of the transceivers  310  and  320 , transceiver  350  and  360 , or both) of the UE  302 , the base station  304 , or both may also comprise a network listen module (NLM) or the like for performing various measurements. 
     The UE  302  and the base station  304  also include, at least in some cases, satellite positioning systems (SPS) receivers, such as SPS receiver  330  and SPS receiver  370 . The SPS receivers  330  and  370  may be connected to one or more antennas, such as antenna  336  and antenna  376 , respectively, for receiving SPS signals, such as SPS signal  338  and SPS signal  378 , respectively, such as global positioning system (GPS) signals, global navigation satellite system (GLONASS) signals, Galileo signals, Beidou signals, Indian Regional Navigation Satellite System (NAVIC), Quasi-Zenith Satellite System (QZSS), etc. The SPS receivers  330  and  370  may comprise any suitable hardware, software, or both for receiving and processing the SPS signals  338  and  378 , respectively. The SPS receivers  330  and  370  request information and operations as appropriate from the other systems, and perform calculations necessary to determine positions of the UE  302  and the base station  304  using measurements obtained by any suitable SPS algorithm. 
     The base station  304  and the network entity  306  each include at least one network interfaces, such as network interface  380  and network interface  390 , for communicating with other network entities. For example, the network interfaces  380  and  390  (e.g., one  or more network access ports) may be configured to communicate with one or more network entities via a wire-based or wireless backhaul connection. In some aspects, the network interfaces  380  and  390  may be implemented as transceivers configured to support wire-based or wireless signal communication. This communication may involve, for example, sending and receiving messages, parameters, other types of information, or various combinations thereof. 
     The UE  302 , the base station  304 , and the network entity  306  also include other components that may be used in conjunction with the operations as disclosed herein. The UE  302  includes processor circuitry implementing a processing system  332  for providing functionality relating to, for example, wireless positioning, and for providing other processing functionality. The base station  304  includes a processing system  384  for providing functionality relating to, for example, wireless positioning as disclosed herein, and for providing other processing functionality. The network entity  306  includes a processing system  394  for providing functionality relating to, for example, wireless positioning as disclosed herein, and for providing other processing functionality. In an aspect, the processing systems  332 ,  384 , and  394  may include, for example, one or more general purpose processors, multi-core processors, ASICs, digital signal processors (DSPs), field programmable gate arrays (FPGA), or other programmable logic devices or processing circuitry. 
     The UE  302 , the base station  304 , and the network entity  306  include memory circuitry implementing the memory components  340 ,  386 , and  396  (e.g., each including a memory device), respectively, for maintaining information (e.g., information indicative of reserved resources, thresholds, parameters, and so on). In some cases, the UE  302 , the base station  304 , and the network entity  306  may include positioning components  342 ,  388 , and  398 , respectively. The positioning components  342 ,  388 , and  398  may be hardware circuits that are part of or coupled to the processing systems  332 ,  384 , and  394 , respectively, that, when executed, cause the UE  302 , the base station  304 , and the network entity  306  to perform the functionality described herein. In other aspects, the positioning components  342 ,  388 , and  398  may be external to the processing systems  332 ,  384 , and  394  (e.g., part of a modem processing system, integrated with another processing system, etc.). Alternatively, the positioning components  342 ,  388 , and  398  may be memory modules stored in the memory components  340 ,  386 , and  396 , respectively, that, when executed by the processing systems  332 ,  384 , and  394  (or a modem processing system,  another processing system, etc.), cause the UE  302 , the base station  304 , and the network entity  306  to perform the functionality described herein.  FIG. 3A  illustrates possible locations of the positioning component  342 , which may be part of the WWAN transceiver  310 , the memory component  340 , the processing system  332 , or any combination thereof, or may be a standalone component.  FIG. 3B  illustrates possible locations of the positioning component  388 , which may be part of the WWAN transceiver  350 , the memory component  386 , the processing system  384 , or any combination thereof, or may be a standalone component.  FIG. 3C  illustrates possible locations of the positioning component  398 , which may be part of the network interface(s)  390 , the memory component  396 , the processing system  394 , or any combination thereof, or may be a standalone component. 
     The UE  302  may include one or more sensors  344  coupled to the processing system  332  to provide movement information, orientation information, or both that is independent of motion data derived from signals received by the WWAN transceiver  310 , the WLAN transceiver  320 , or the SPS receiver  330 . By way of example, the sensor(s)  344  may include an accelerometer (e.g., a micro-electrical mechanical systems (MEMS) device), a gyroscope, a geomagnetic sensor (e.g., a compass), an altimeter (e.g., a barometric pressure altimeter), any other type of movement detection sensor, or combinations thereof. Moreover, the sensor(s)  344  may include a plurality of different types of devices and combine their outputs in order to provide motion information. For example, the sensor(s)  344  may use a combination of a multi-axis accelerometer and orientation sensors to provide the ability to compute positions in 2D or 3D coordinate systems. 
     In addition, the UE  302  includes a user interface  346  for providing indications (e.g., audible indications, visual indications, or both) to a user, for receiving user input (e.g., upon user actuation of a sensing device such a keypad, a touch screen, a microphone, and so on), or for both. Although not shown, the base station  304  and the network entity  306  may also include user interfaces. 
     Referring to the processing system  384  in more detail, in the downlink, IP packets from the network entity  306  may be provided to the processing system  384 . The processing system  384  may implement functionality for an RRC layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The processing system  384  may provide RRC layer functionality associated with broadcasting of system information (e.g., master information block (MIB), system  information blocks (SIBs)), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-RAT mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression/decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs), error correction through automatic repeat request (ARQ), concatenation, segmentation, and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, scheduling information reporting, error correction, priority handling, and logical channel prioritization. 
     The transmitter  354  and the receiver  352  may implement Layer-1 functionality associated with various signal processing functions. Layer-1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing. The transmitter  354  handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an orthogonal frequency division multiplexing (OFDM) subcarrier, multiplexed with a reference signal (e.g., pilot) in the time domain, in the frequency domain, or in both, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM symbol stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal, from channel condition feedback transmitted by the UE  302 , or from both. Each spatial stream may then be provided to one or more different antennas  356 . The transmitter  354  may modulate an RF carrier with a respective spatial stream for transmission. 
     At the UE  302 , the receiver  312  receives a signal through its respective antenna(s)  316 . The receiver  312  recovers information modulated onto an RF carrier and provides the  information to the processing system  332 . The transmitter  314  and the receiver  312  implement Layer-1 functionality associated with various signal processing functions. The receiver  312  may perform spatial processing on the information to recover any spatial streams destined for the UE  302 . If multiple spatial streams are destined for the UE  302 , they may be combined by the receiver  312  into a single OFDM symbol stream. The receiver  312  then converts the OFDM symbol stream from the time-domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station  304 . These soft decisions may be based on channel estimates computed by a channel estimator. The soft decisions are then decoded and de-interleaved to recover the data and control signals that were originally transmitted by the base station  304  on the physical channel. The data and control signals are then provided to the processing system  332 , which implements Layer-3 and Layer-2 functionality. 
     In the uplink, the processing system  332  provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the core network. The processing system  332  is also responsible for error detection. 
     Similar to the functionality described in connection with the downlink transmission by the base station  304 , the processing system  332  provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression/decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through hybrid automatic repeat request (HARM), priority handling, and logical channel prioritization. 
     Channel estimates derived by the channel estimator from a reference signal or feedback transmitted by the base station  304  may be used by the transmitter  314  to select the  appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the transmitter  314  may be provided to different antenna(s)  316 . The transmitter  314  may modulate an RF carrier with a respective spatial stream for transmission. 
     The uplink transmission is processed at the base station  304  in a manner similar to that described in connection with the receiver function at the UE  302 . The receiver  352  receives a signal through its respective antenna(s)  356 . The receiver  352  recovers information modulated onto an RF carrier and provides the information to the processing system  384 . 
     In the uplink, the processing system  384  provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE  302 . IP packets from the processing system  384  may be provided to the core network. The processing system  384  is also responsible for error detection. 
     For convenience, the UE  302 , the base station  304  and the network entity  306  are shown in  FIGS. 3A-C  as including various components that may be configured according to the various examples described herein. It will be appreciated, however, that the illustrated blocks may have different functionality in different designs. 
     The various components of the UE  302 , the base station  304 , and the network entity  306  may communicate with each other over data buses  334 ,  382 , and  392 , respectively. The components of  FIGS. 3A-C  may be implemented in various ways. In some implementations, the components of  FIGS. 3A-C  may be implemented in one or more circuits such as, for example, one or more processors, one or more ASICs (which may include one or more processors), or both. Here, each circuit may use or incorporate at least one memory component for storing information or executable code used by the circuit to provide this functionality. For example, some or all of the functionality represented by blocks  310  to  346  may be implemented by processor and memory component(s) of the UE  302  (e.g., by execution of appropriate code, by appropriate configuration of processor components, or by both). Similarly, some or all of the functionality represented by blocks  350  to  388  may be implemented by processor and memory component(s) of the base station  304  (e.g., by execution of appropriate code, by appropriate configuration of processor components, or by both). Also, some or all of the functionality represented by blocks  390  to  398  may be implemented by processor and  memory component(s) of the network entity  306  (e.g., by execution of appropriate code, by appropriate configuration of processor components, or by both). For simplicity, various operations, acts, or functions are described herein as being performed “by a UE,” “by a base station,” “by a positioning entity,” etc. However, as will be appreciated, such operations, acts, or functions may actually be performed by specific components or combinations of components of the UE, base station, positioning entity, etc., such as the processing systems  332 ,  384 ,  394 , the transceivers  310 ,  320 ,  350 , and  360 , the memory components  340 ,  386 , and  396 , the positioning components  342 ,  388 , and  398 , etc. 
     NR supports a number of cellular network-based positioning technologies, including downlink-based, uplink-based, and downlink-and-uplink-based positioning methods. Downlink-based positioning methods include observed time difference of arrival (OTDOA) in LTE, downlink time difference of arrival (DL-TDOA) in NR, and downlink angle-of-departure (DL-AoD) in NR. In an OTDOA or DL-TDOA positioning procedure, a UE measures the differences between the times of arrival (TOAs) of reference signals (e.g., PRS, TRS, narrowband reference signal (NRS), CSI-RS, SSB, etc.) received from pairs of base stations, referred to as reference signal time difference (RSTD) or time difference of arrival (TDOA) measurements, and reports them to a positioning entity. More specifically, the UE receives the identifiers of a reference base station (e.g., a serving base station) and multiple non-reference base stations in assistance data. The UE then measures the RSTD between the reference base station and each of the non-reference base stations. Based on the known locations of the involved base stations and the RSTD measurements, the positioning entity can estimate the UE&#39;s location. For DL-AoD positioning, a base station measures the angle and other channel properties (e.g., signal strength) of the downlink transmit beam used to communicate with a UE to estimate the location of the UE. 
     Uplink-based positioning methods include uplink time difference of arrival (UL-TDOA) and uplink angle-of-arrival (UL-AoA). UL-TDOA is similar to DL-TDOA, but is based on uplink reference signals (e.g., SRS) transmitted by the UE. For UL-AoA positioning, a base station measures the angle and other channel properties (e.g., gain level) of the uplink receive beam used to communicate with a UE to estimate the location of the UE. 
     Downlink-and-uplink-based positioning methods include enhanced cell-ID (E-CID) positioning and multi-round-trip-time (RTT) positioning (also referred to as “multi-cell RTT”). In an RTT procedure, an initiator (a base station or a UE) transmits an RTT  measurement signal (e.g., a PRS or SRS) to a responder (a UE or base station), which transmits an RTT response signal (e.g., an SRS or PRS) back to the initiator. The RTT response signal includes the difference between the TOA of the RTT measurement signal and the transmission time of the RTT response signal, referred to as the reception-to-transmission (Rx-Tx) measurement. The initiator calculates the difference between the transmission time of the RTT measurement signal and the TOA of the RTT response signal, referred to as the “Tx-Rx” measurement. The propagation time (also referred to as the “time of flight”) between the initiator and the responder can be calculated from the Tx-Rx and Rx-Tx measurements. Based on the propagation time and the known speed of light, the distance between the initiator and the responder can be determined. For multi-RTT positioning, a UE performs an RTT procedure with multiple base stations to enable its location to be triangulated based on the known locations of the base stations. RTT and multi-RTT methods can be combined with other positioning techniques, such as UL-AoA and DL-AoD, to improve location accuracy. 
     The E-CID positioning method is based on radio resource management (RRM) measurements. In E-CID, the UE reports the serving cell ID, the timing advance (TA), and the identifiers, estimated timing, and signal strength of detected neighbor base stations. The location of the UE is then estimated based on this information and the known locations of the base stations. 
     To assist positioning operations, a location server (e.g., location server  112 , LMF  270 , SLP  272 ) may provide assistance data to the UE. For example, the assistance data may include identifiers of the base stations (or the cells/TRPs of the base stations) from which to measure reference signals, the reference signal configuration parameters (e.g., the number of consecutive positioning slots, periodicity of positioning slots, muting sequence, frequency hopping sequence, reference signal identifier (ID), reference signal bandwidth, slot offset, etc.), other parameters applicable to the particular positioning method, or combinations thereof. Alternatively, the assistance data may originate directly from the base stations themselves (e.g., in periodically broadcasted overhead messages, etc.). In some cases, the UE may be able to detect neighbor network nodes itself without the use of assistance data. 
     A location estimate may be referred to by other names, such as a position estimate, location, position, position fix, fix, or the like. A location estimate may be geodetic and comprise coordinates (e.g., latitude, longitude, and possibly altitude) or may be civic and  comprise a street address, postal address, or some other verbal description of a location. A location estimate may further be defined relative to some other known location or defined in absolute terms (e.g., using latitude, longitude, and possibly altitude). A location estimate may include an expected error or uncertainty (e.g., by including an area or volume within which the location is expected to be included with some specified or default level of confidence). 
     Various frame structures may be used to support downlink and uplink transmissions between network nodes (e.g., base stations and UEs). 
       FIG. 4A  is a diagram  400  illustrating an example of a downlink frame structure, according to aspects. 
       FIG. 4B  is a diagram  430  illustrating an example of channels within the downlink frame structure, according to aspects. Other wireless communications technologies may have different frame structures, different channels, or both. 
     LTE, and in some cases NR, utilizes OFDM on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink. Unlike LTE, however, NR has an option to use OFDM on the uplink as well. OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier may be modulated with data. In general, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system bandwidth. For example, the spacing of the subcarriers may be 15 kHz and the minimum resource allocation (resource block) may be 12 subcarriers (or 180 kHz). Consequently, the nominal FFT size may be equal to 128, 256, 504, 1024, or 2048 for system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), respectively. The system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.8 MHz (i.e., 6 resource blocks), and there may be 1, 2, 4, 8, or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10, or 20 MHz, respectively. 
     LTE supports a single numerology (subcarrier spacing, symbol length, etc.). In contrast, NR may support multiple numerologies (μ), for example, subcarrier spacing of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz or greater may be available. Table 1 provided below lists some various parameters for different NR numerologies.  
     
       
         
           
               
               
               
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                   
                   
                   
                   
                 Slot 
                 Symbol 
                 Max. nominal 
               
               
                   
                   
                 Sym- 
                 Slots/ 
                   
                 Dura- 
                 Dura- 
                 system BW 
               
               
                   
                 SCS 
                 bols/ 
                 Sub- 
                 Slots/ 
                 tion 
                 tion 
                 (MHz) with 
               
               
                 μ 
                 (kHz) 
                 Sot 
                 frame 
                 Frame 
                 (ms) 
                 (μs) 
                 4K FFT size 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 0 
                 15 
                 14 
                 1 
                 10 
                 1 
                 66.7 
                 50 
               
               
                 1 
                 30 
                 14 
                 2 
                 20 
                 0.5 
                 33.3 
                 100 
               
               
                 2 
                 60 
                 14 
                 4 
                 40 
                 0.25 
                 16.7 
                 100 
               
               
                 3 
                 120 
                 14 
                 8 
                 80 
                 0.125 
                 8.33 
                 400 
               
               
                 4 
                 240 
                 14 
                 16 
                 160 
                 0.0625 
                 4.17 
                 800 
               
               
                   
               
            
           
         
       
     
     In the example of  FIGS. 4A and 4B , a numerology of 15 kHz is used. Thus, in the time domain, a 10 millisecond (ms) frame is divided into 10 equally sized subframes of 1 ms each, and each subframe includes one time slot. In  FIGS. 4A and 4B , time is represented horizontally (e.g., on the X axis) with time increasing from left to right, while frequency is represented vertically (e.g., on the Y axis) with frequency increasing (or decreasing) from bottom to top. 
     A resource grid may be used to represent time slots, each time slot including one or more time-concurrent resource blocks (RBs) (also referred to as physical RBs (PRBs)) in the frequency domain. The resource grid is further divided into multiple resource elements (REs). An RE may correspond to one symbol length in the time domain and one subcarrier in the frequency domain. In NR, a subframe is 1 ms in duration, a slot is fourteen symbols in the time domain, and an RB contains twelve consecutive subcarriers in the frequency domain and fourteen consecutive symbols in the time domain. Thus, in NR there is one RB per slot. Depending on the SCS, an NR subframe may have fourteen symbols, twenty-eight symbols, or more, and thus may have 1 slot, 2 slots, or more. The number of bits carried by each RE depends on the modulation scheme. 
     Some of the REs carry downlink reference (pilot) signals (DL-RS). The DL-RS may include PRS, TRS, PTRS, CRS, CSI-RS, DMRS, PSS, SSS, SSB, etc.  FIG. 4A  illustrates exemplary locations of REs carrying PRS (labeled “R”). 
     A “PRS instance” or “PRS occasion” is one instance of a periodically repeated time window (e.g., a group of one or more consecutive slots) where PRS are expected to be transmitted. A PRS occasion may also be referred to as a “PRS positioning occasion,” a  “PRS positioning instance, a “positioning occasion,” “a positioning instance,” a “positioning repetition,” or simply an “occasion,” an “instance,” or a “repetition.” 
     A collection of resource elements (REs) that are used for transmission of PRS is referred to as a “PRS resource.” The collection of resource elements can span multiple PRBs in the frequency domain and ‘N’ (e.g., 1 or more) consecutive symbol(s) within a slot in the time domain. In a given OFDM symbol in the time domain, a PRS resource occupies consecutive PRBs in the frequency domain. 
     The transmission of a PRS resource within a given PRB has a particular comb size (also referred to as the “comb density”). A comb size ‘N’ represents the subcarrier spacing (or frequency/tone spacing) within each symbol of a PRS resource configuration. Specifically, for a comb size ‘N,’ PRS are transmitted in every Nth subcarrier of a symbol of a PRB. For example, for comb-4, for each of the fourth symbols of the PRS resource configuration, REs corresponding to every fourth subcarrier (e.g., subcarriers 0, 4, 8) are used to transmit PRS of the PRS resource. Currently, comb sizes of comb-2, comb-4, comb-6, and comb-12 are supported for DL PRS.  FIG. 4A  illustrates an exemplary PRS resource configuration for comb-6 (which spans six symbols). That is, the locations of the shaded REs (labeled “R”) indicate a comb-6 PRS resource configuration. 
     A “PRS resource set” is a set of PRS resources used for the transmission of PRS signals, where each PRS resource has a PRS resource ID. In addition, the PRS resources in a PRS resource set are associated with the same TRP. A PRS resource set is identified by a PRS resource set ID and is associated with a particular TRP (identified by a TRP ID). In addition, the PRS resources in a PRS resource set have the same periodicity, a common muting pattern configuration, and the same repetition factor (e.g., PRS-ResourceRepetitionFactor) across slots. The periodicity is the time from the first repetition of the first PRS resource of a first PRS instance to the same first repetition of the same first PRS resource of the next PRS instance. The periodicity may have a length selected from 2 μ ·{4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 640, 1280, 2560, 5040, 10240} slots, with μ=0, 1, 2, 3. The repetition factor may have a length selected from {1, 2, 4, 6, 8, 16, 32} slots. 
     A PRS resource ID in a PRS resource set is associated with a single beam (or beam ID) transmitted from a single TRP (where a TRP may transmit one or more beams). That is, each PRS resource of a PRS resource set may be transmitted on a different beam, and as such, a “PRS resource,” or simply “resource,” can also be referred to as a “beam.” Note  that this does not have any implications on whether the TRPs and the beams on which PRS are transmitted are known to the UE. 
     A “positioning frequency layer” (also referred to simply as a “frequency layer”) is a collection of one or more PRS resource sets across one or more TRPs that have the same values for certain parameters. Specifically, the collection of PRS resource sets has the same subcarrier spacing (SCS) and cyclic prefix (CP) type (meaning all numerologies supported for the PDSCH are also supported for PRS), the same Point A, the same value of the downlink PRS bandwidth, the same start PRB (and center frequency), and the same comb-size. The Point A parameter takes the value of the parameter ARFCN-ValueNR (where “ARFCN” stands for “absolute radio-frequency channel number”) and is an identifier/code that specifies a pair of physical radio channel used for transmission and reception. The downlink PRS bandwidth may have a granularity of four PRBs, with a minimum of 24 PRBs and a maximum of 272 PRBs. Currently, up to four frequency layers have been defined, and up to two PRS resource sets may be configured per TRP per frequency layer. 
     The concept of a frequency layer is somewhat like the concept of component carriers and bandwidth parts (BWPs), but different in that component carriers and BWPs are used by one base station (or a macro cell base station and a small cell base station) to transmit data channels, while frequency layers are used by several (usually three or more) base stations to transmit PRS. A UE may indicate the number of frequency layers it can support when it sends the network its positioning capabilities, such as during an LTE positioning protocol (LPP) session. For example, a UE may indicate whether it can support one or four positioning frequency layers. 
       FIG. 4B  illustrates an example of various channels within a downlink slot of a radio frame. In NR, the channel bandwidth, or system bandwidth, is divided into multiple BWPs. A BWP is a contiguous set of PRBs selected from a contiguous subset of the common RBs for a given numerology on a given carrier. Generally, a maximum of four BWPs can be specified in the downlink and uplink. That is, a UE can be configured with up to four BWPs on the downlink, and up to four BWPs on the uplink. Only one BWP (uplink or downlink) may be active at a given time, meaning the UE may only receive or transmit over one BWP at a time. On the downlink, the bandwidth of each BWP should be equal to or greater than the bandwidth of the SSB, but it may or may not contain the SSB.  
     Referring to  FIG. 4B , a primary synchronization signal (PSS) is used by a UE to determine subframe/symbol timing and a physical layer identity. A secondary synchronization signal (SSS) is used by a UE to determine a physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a PCI. Based on the PCI, the UE can determine the locations of the aforementioned DL-RS. The physical broadcast channel (PBCH), which carries an MIB, may be logically grouped with the PSS and SSS to form an SSB (also referred to as an SS/PBCH). The MIB provides a number of RBs in the downlink system bandwidth and a system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH, such as system information blocks (SIBs), and paging messages. 
     The physical downlink control channel (PDCCH) carries downlink control information (DCI) within one or more control channel elements (CCEs), each CCE including one or more RE group (REG) bundles (which may span multiple symbols in the time domain), each REG bundle including one or more REGs, each REG corresponding to 12 resource elements (one resource block) in the frequency domain and one OFDM symbol in the time domain. The set of physical resources used to carry the PDCCH/DCI is referred to in NR as the control resource set (CORESET). In NR, a PDCCH is confined to a single CORESET and is transmitted with its own DMRS. This enables UE-specific beamforming for the PDCCH. 
     In the example of  FIG. 4B , there is one CORESET per BWP, and the CORESET spans three symbols (although it could be only one or two symbols) in the time domain. Unlike LTE control channels, which occupy the entire system bandwidth, in NR, PDCCH channels are localized to a specific region in the frequency domain (i.e., a CORESET). Thus, the frequency component of the PDCCH shown in  FIG. 4B  is illustrated as less than a single BWP in the frequency domain. Note that although the illustrated CORESET is contiguous in the frequency domain, it need not be. In addition, the CORESET may span less than three symbols in the time domain. 
     The DCI within the PDCCH carries information about uplink resource allocation (persistent and non-persistent) and descriptions about downlink data transmitted to the UE. Multiple (e.g., up to eight) DCIs can be configured in the PDCCH, and these DCIs can have one of multiple formats. For example, there are different DCI formats for uplink  scheduling, for non-MIMO downlink scheduling, for MIMO downlink scheduling, and for uplink power control. A PDCCH may be transported by 1, 2, 4, 8, or 16 CCEs in order to accommodate different DCI payload sizes or coding rates. 
       FIG. 5  is a diagram illustrating how a non-line-of-sight (NLOS) positioning signal can cause a UE  104  to miscalculate its position. In  FIG. 5 , the UE  104  operating within an area populated by multiple base stations  102  calculates its position based on time of arrival (TOA) of signals from those base stations  102 . The UE  104  knows the geographic locations of the base stations  102 , e.g., via receipt of assistance data provided by a location server. The assistance data may also identify PRS resources, PRS resource sets, transmission reception points (TRPs), or combinations thereof, for the UE to use for positioning. For brevity of description, PRS resources, PRS resource sets, TRPs, or combinations thereof, will be collectively referred to herein as “positioning sources.” The UE  104  determines its geographic position based on its distance from each of one or more of the base stations  102 , which the UE  104  calculates based on the TOA of signals from the particular base station  102  and the speed of a radio signal in air, presuming that the TOA corresponds to the time of flight of a LOS path. 
     However, if a signal from a base station  102  is an NLOS signal, the signal will have traveled farther than the direct distance to the UE, and so the TOA of the NLOS signal will be later than the TOA of that signal had it been a LOS signal instead of a NLOS signal. This means that if the UE  104  happens to base its positioning estimation on the TOA of a NLOS signal, the artificially long TOA value of the NLOS signal will skew the position calculation such that the UE  104  is in an apparent location that is different from its actual location. Thus, one challenge is to distinguish NLOS signals from LOS signals, so that NLOS signals are excluded from consideration during positioning estimations. 
     One method to distinguish NLOS signals from LOS signal is outlier detection. Outlier detection analyzes positioning signals from a set of cells to each other to determine which of those cells seem to produce TOA values that are “outliers” compared to TOA values produced by other cells in the cohort. Outlier detection produces what is referred to as a “consistency group”, which is a collection of N number of positioning sources that resulted in positioning measurements (e.g., RSTD, RSRP, Rx-Tx) such that using a subset X of those N positioning sources for positioning would result in a position estimate which, if used to estimate the TOA to the remaining N-X positioning sources, would result in a value having a error within a threshold T. The size of the consistency group produced by  outlier detection on a set of cells can be any value from zero to the size of the entire set of cells being analyzed, but is usually a value somewhere in between. 
     One way to define one consistency group is a set of measurement suffers from the same/similar errors, such as internal timing errors (e.g., hardware group delay, etc.). The following definitions are used for the purpose of describing internal timing errors: 
     Transmit (Tx) timing error: From a signal transmission perspective, there is a time delay from the time when the digital signal is generated at the baseband to the time when the RF signal is transmitted from the transmit antenna. For supporting positioning, the UE/TRP may implement an internal calibration/compensation of the transmit time delay for the transmission of the DL-PRS/UL-SRS, which may also include the calibration/compensation of the relative time delay between different RF chains in the same UE/TRP. The compensation may also consider the offset of the transmit antenna phase center to the physical antenna center. However, the calibration may not be perfect. The remaining transmit time delay after the calibration, or the uncalibrated transmit time delay is defined as the “transmit timing error” or “Tx timing error.” 
     Receive (Rx) timing error: From a signal reception perspective, there is a time delay from the time when the RF signal arrives at the Rx antenna to the time when the signal is digitized and time-stamped at the baseband. For supporting positioning, the UE/TRP may implement an internal calibration/compensation of the Rx time delay before it reports the measurements that are obtained from the DL-PRS/SRS, which may also include the calibration/compensation of the relative time delay between different RF chains in the same UE/TRP. The compensation may also consider the offset of the Rx antenna phase center to the physical antenna center. However, the calibration may not be perfect. The remaining Rx time delay after the calibration, or the uncalibrated Rx time delay, is defined as the “Rx timing error.” 
     UE Tx timing error group (TEG): A UE Tx TEG (or TxTEG) is associated with the transmissions of one or more SRS resources for the positioning purpose, which have the Tx timing errors within a certain margin (e.g., within a threshold of each other). 
     TRP Tx TEG: A TRP Tx TEG (or TxTEG) is associated with the transmissions of one or more DL-PRS resources, which have the Tx timing errors within a certain margin. 
     UE Rx TEG: A UE Rx TEG (or RxTEG) is associated with one or more downlink measurements, which have the Rx timing errors within a certain margin.  
     TRP Rx TEG: A TRP Rx TEG (or RxTEG) is associated with one or more uplink measurements, which have the Rx timing errors within a margin. 
     UE Rx-Tx TEG: A UE Rx-Tx TEG (or RxTxTEG) is associated with one or more UE Rx-Tx time difference measurements, and one or more SRS resources for the positioning purpose, which have the Rx timing errors plus Tx timing errors within a certain margin. 
     TRP Rx-Tx TEG: A TRP Rx-Tx TEG (or RxTxTEG) is associated with one or more TRP Rx-Tx time difference measurements and one or more DL-PRS resources, which have the Rx timing errors plus Tx timing errors within a certain margin. 
     Consistency groups are not limited to groupings of positioning sources with similar timing errors, but can also be configured with positioning sources with other shared error characteristic(s), such as a shared angle error characteristic or a combination of shared timing angle error characteristic(s) and shared angle error characteristic(s). 
     Another way (e.g., a computationally complete analysis) of the cells in the set to each other would require the comparison of every possible combination of subsets of cells to the remainder of the cells in the cohort, but this is computationally burdensome and impractical for UEs, so a technique called random sampling and consensus (RANSAC) is used instead. This technique analyzes a group of candidate positioning sources to each other in various combinations by randomly selecting a subset of the positioning sources in the group, generating an estimated UE position based on that subset, using that position estimate so generated to predict the TOA timings to the rest of the positioning sources not in that subset, and checking to see how well the predicted TOA matched the actual TOA for each of the positioning sources not in the subset, e.g., by determining whether the difference between the actual and predicted TOA is within a timing error threshold value T. Positioning sources within the error threshold value are referred to as inliers. Positioning sources that are not within the threshold value are referred to as outliers. The number of inliers L is determined for each randomly selected sample. 
     Since it is possible that one of the positioning sources in the randomly selected subset might be NLOS, which would skew the estimated UE position and thus skew the estimated TOAs to the cells not in that subset, the RANSAC algorithm performs the operations described above multiple times, each time using a different randomly selected subset of positioning sources from the group. After a number of iterations, the subset of positioning sources that produced the largest number of inliers, and those inliers, are reported as the members of the consistency group. The outliers are excluded from the  consistency group. The identified consistency group is then used as the pool of positioning sources from which the UE calculates its final estimated position. An example implementation of RANSAC is shown in  FIG. 6 . 
       FIG. 6  is a flow chart showing a conventional method  600  for outlier detection, RANSAC, in UE based positioning. In  FIG. 6 , at  602 , the UE identifies a set of positioning sources of candidate positioning sources (in this example, a set of cells), e.g., based on link quality. At  604 , the UE randomly chooses a subset C of cells, the subset being of size K, e.g., having K number of cells in the subset. At  606 , the UE estimates its position using TOA values of the positioning signals from cells in the subset C. At  608 , the UE computes the expected TOA from cells in the set of positioning sources not in the subset C. At  610 , the UE finds L, the number of inliers (cells where the difference between the actual TOA and the expected TOA is within the timing error tolerance T). At  612 , the UE determines whether or not processing of more subsets is needed, e.g., by determining if the number of random subsets is less than the target number of random subsets M. If not, the process repeats starting from  604 , with another randomly selected subset of cells, and continues until M subsets have been tested. From there, at  614 , the subset C that produced the largest value for L is identified, and at  616 , cells in that subset, as well as the inliers found based on that subset, are used to compute the position of the UE. At  618 , the non-inlier cells are declared to be outlier cells, and at  620 , the UE reports the consistency group membership as the set of positioning sources excluding the outlier cells to the network. The same outlier detection procedure can be done at network side (e.g., which may prompt the network to split apart consistency groups or merge consistency groups or define new consistency groups and so on). 
     There are disadvantages to the conventional method for identifying outliers described above. One disadvantage is that varying any of the parameters K (size of the random set C), M (number of iterations), and T (tolerance used to distinguish inliers from outliers) can lead to different results. 
     Another disadvantage is that, because not every possible combination of subsets and remainders was calculated, there is a possibility that not every outlier was identified and excluded from the consistency group, meaning that it is possible that some subset C selected from the consistency group could include a NLOS positioning source, which may lead to a positioning error. For example, the random selection process could select a subset of positioning sources having multiple NLOS errors that happen to cancel each  other and produce what seems to be reasonable result, such that the algorithm does not identify the NLOS positioning sources and exclude them from the consistency group that it reports to the network. Likewise, the random selection process could select random groups that, while not exactly the same, are similar enough to each other that coverage of the full set of positioning sources is less than intended, or the number M was effectively not big enough. 
     Yet another disadvantage is that the conventional method for outlier identification reports the membership of the consistency group, which by definition includes positioning sources whose TOA values are within a threshold margin of error, but does not give an indication of whether the cells in the consistency group easily met the threshold or just barely met the threshold, and does not give any information about whether some groups of positioning sources had better consistency (e.g., the difference between expected and actual TOA was smaller) compared to other groups. 
     Yet another disadvantage is that not only can an NLOS signal skew the apparent values of TOA, but an NLOS signal can also skew the values of other time-angle metrics, such as RTT, RSTD, time difference of arrival (TDOA), angle of arrival (AoA) and zenith of arrival (ZoA) at the UE  104 , as well as angle of departure (AoD) and zenith of departure (ZoD) from the base station  102  for a signal received by the UE  104 . Conventional methods, however, do not consider angle measurements, such as AoA, AoD, ZoA, or ZoD, when defining consistency groups. 
     To address these technical disadvantages, an improved method for identifying outliers is herein presented, wherein in addition to reporting a consistency group that satisfies an error threshold, information about subsets within the consistency group is also provided to the network. Also, the definition of consistency group is expanded to optionally include consistency based on angle, i.e., the error threshold may be a timing error threshold (E T ), and angle error threshold (E A ), or combinations thereof. Thus, as used herein, the error threshold may refer to a timing error threshold, an angle error threshold, or combinations of both. Where multiple time-angle metrics are considered, in some aspects, each time-angle metric may have its own separate error threshold, there may be an error threshold applied to some combination of time-angle metrics, or combinations thereof. 
       FIG. 7  illustrates a method  700  of wireless communication according to some aspects of the disclosure. In  FIG. 7 , at  702 , a location server  112  or other network entity sends a  definition of a set of positioning sources to a base station  102  that is serving a UE  104 . At  704 , the base station  102  forwards set of positioning sources to the UE  104 . In some aspects, at  706 , the location server  112  or other network entity may provide a predefined list of subsets of positioning sources within the set of positioning sources, and at  708 , the base station  102  forwards the predefined list of subsets of positioning sources to the UE  104 . Both two steps may be done via LPP protocol and the forwarding operations at BS may be transparent to BS (meaning BS only forward the packet without packing/unpacking the LPP protocol) At  710 , the UE performs outlier detection according to aspects of the present disclosure (e.g., for UE-based position estimation with RANSAC, etc.), described in more detail below, and at  712 , the UE reports the results of the outlier detection, the results including one or more identified consistency groups and a list of at least one subset of the positioning sources within the consistency group, shown in  FIG. 7  as {Si . . . Sn}. Optionally, the UE  104  may also provide additional information about each subset, such as their errors {Ei . . . En}, other information, or combinations thereof. At  714 , the base station  102  forwards the information to the location server  112  or other network entity. While  FIG. 7  is described with respect to RANSAC with respect to UE-based position estimation, outlier detection can also be implemented for UE-assisted position estimation (e.g., UE may report measurements of defined in multiple consistency groups, where each groups suffer similar or same errors (e.g., same hardware group delay or internal timing delay) less than a threshold T) 
       FIG. 8  is a flow chart illustrating a portion of method  700 , outlier detection  710 , in more detail according to some aspects of the disclosure. In some aspects, the outlier detection may be performed by a UE. In some aspects, the outlier detection includes, at  800 , identifying a set of positioning sources, each positioning source comprising a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or combinations thereof. 
     In some aspects, the outlier detection includes, at  802 , identifying, from the set of positioning sources, positioning sources that form a consistency group, the consistency group comprising a collection of positioning sources characterized that a UE position estimate based on a subset of positioning sources in the consistency group and used to estimate a time-angle metric of a reference signal from a positioning source not in the subset will result in an estimated time-angle metric that differs from the measured time-angle metric for the positioning source not in the subset by a value less than an error  threshold. For example, the identification of the set of positioning sources that form the consistency group at  802  may be based upon outlier detection for UE-based position estimation as described above with respect to  FIG. 7  (or alternatively, via outlier detection for UE-assisted position estimation). Alternatively, the identification of the set of positioning sources that form the consistency group at  802  may be based upon UE hardware configuration. For example, a particular UE/gNB hardware information may be associated with a particular consistency group (at least by default, with potential to change). 
     In some aspects, the outlier detection includes, at  804 , identifying one or more subsets of positioning sources within the consistency group, each subset having an error value, which may be a timing error, an angle error, or some combination thereof. 
     In some aspects, the outlier detection includes, at  806 , reporting, to a network entity, information about the consistency group and information about at least one of the one or more subsets of positioning sources within the consistency group. In some aspects, the error values may also be reported with each subset. 
     In some aspects, the time-angle metric may include a time of arrival (TOA), an angle of arrival (AoA), a zenith of arrival (ZoA), a time difference of arrival (TDOA), a time of departure (ToD), an angle of departure (AoD), a zenith of departure (ZoD), a reference signal time difference (RSTD), a reference signal received power (RSRP), a round-trip time (RTT), or combinations thereof. In some aspects, the error threshold may include a time-angle threshold. In some aspects, the time-angle threshold may include a timing threshold, an angle threshold, a received power threshold, or combinations thereof In some aspects, the error threshold may include multiple time-angle thresholds. In some aspects, each member of the consistency group must satisfy at least one of the multiple time-angle thresholds. In some aspects, each member of the consistency group must satisfy all of the multiple time-angle thresholds. 
     In some aspects, identifying the set of positioning sources may include receiving the set of positioning sources from a base station. In some aspects, identifying, from the set of positioning sources, positioning sources that form a consistency group, may include: performing a sampling and consensus operation a number of times m&gt;1, each sampling and consensus operation using a different sampling subset of positioning sources in the set of positioning sources to identify, as inliers, positioning sources not in the sampling subset that have an error less than the error threshold; selecting a sampling subset that  produced a largest number of inliers; identifying, as outliers, positioning sources not in the sampling subset that produced the largest number of inliers not having an error less than the error threshold; identifying, as the consistency group, set of positioning sources excluding the outliers; and computing a UE position based on values of one or more time-angle metrics from positioning sources selected from a combination of the sampling subset that produced the largest number of inliers and the inliers identified using the sampling subset that produced the largest number of inliers. 
     In some aspects, performing the sampling and consensus operation may include: selecting, from the set of positioning sources, a sampling subset; estimating, using time-angle metric values from the positioning sources in the sampling subset, a position of the UE; computing an expected time-angle metric value from the estimated position of the UE to the positioning sources in set of positioning sources not in the sampling subset; determining Li, the number of inliers associated with the sampling subset, the inliers including positioning sources in set of positioning sources not in the sampling subset that have an error less than the error threshold; and determining an error of the inliers, which may be an average error, a maximum error, a minimum error, or other error metric. 
     In some aspects, selecting, from the set of positioning sources, a sampling subset may include randomly selecting positioning sources within set of positioning sources to create the sampling subset. In some aspects, selecting, from the set of positioning sources, a sampling subset may include selecting positioning sources within set of positioning sources to create the sampling subset according to a pseudorandom sequence. 
     In some aspects, selecting, from the set of positioning sources, a sampling subset may include selecting a subset from a predefined list of subsets of positioning sources within set of positioning sources. In some aspects, every sampling subset is a same size. In some aspects, at least one sampling subset is a different size from another sampling subset. In some aspects, the method may include storing the sampling subset, Li, and the error of the inliers. 
     In some aspects, reporting information about at least one of the subsets may include identifying the positioning sources included in each subset. In some aspects, the positioning sources included in each subset are identified completely or differentially, explicitly or implicitly, by index or reference, or combinations thereof. In some aspects, reporting information about at least one of the subsets may include reporting an error associated with each subset. In some aspects, reporting information about at least one of  the subsets may include reporting an error for each positioning source included in the subset. In some aspects, reporting an error for each positioning source included in the subset may include reporting the error for each positioning source with respect to the error threshold, with respect to a consensus value produced by the subset, or combinations thereof. In some aspects, reporting information about at least one of the subsets may include reporting subsets having an error that satisfies a threshold reporting value Tr. 
       FIGS. 9A and 9B  are flow charts illustrating portions of the outlier detection shown in  FIG. 8  in more detail, according to some aspects of the disclosure. 
     In  FIG. 9A , identifying  802  positioning sources that form a consistency group and identifying  804  one or more subsets of positioning sources within the consistency group comprise the following steps. 
     At  900 , from set of positioning sources, choose a sampling subset of size K. (For brevity, a sampling subset may also be referred to herein simply as a subset.) In some aspects, the subset may be randomly selected from the set of positioning sources. In some aspects, the subset may be selected from a predefined list of subsets provided to the UE by the network. 
     At  902 , estimate the UE position using values of one or more time-angle metrics from the positioning sources in sampling subset. In one example, the UE position is estimated using TOA values from the positioning sources in the sampling subset. In another example, the UE position is estimated using the combination of TOA and AoA values from the positioning sources in the sampling subset. 
     At  904 , use the UE position to compute expected values of the one or more time-angle metrics values from cells in set of positioning sources but not in subset. In one example, the estimated UE position is used to compute expected values of TOA for the cells in set of positioning sources but not in subset. In another example, the estimated UE position is used to compute expected values of TOA and AoA for the cells in set of positioning sources but not in subset. 
     At  906 , determine Li, the number of inliers in the set of positioning sources associated with the sampling subset, and the error of the inliers. For example, the error of the inliers may be a timing error, an angle error, or combinations thereof. In some aspects, the error of the inliers is the average error of the inliers, but may alternatively be the maximum time-angel metric error of the inliers, or may be calculated in some other manner.  
     At  908 , the subset, number of inliers Li based on subset, and the error of those inliers is stored (e.g., in a random access memory (RAM) or flash memory within the UE) for later access. In some aspects, the list of inliers Ii determined using the sampling subset may also be stored. 
     The operations  900  through  908  comprises a sampling and consensus operation  910  using one subset of the positioning sources in set of positioning sources, and, at  912 , it is determined whether additional sampling and consensus operations  910  should be performed. In  FIG. 9A , a parameter M specifies how many sampling and consensus operations  910 , and thus, how many subsets, must be processed. If the number of subsets that have been processed is less than M, the sampling and consensus operation  910  is repeated until M subsets have been processed. In some aspects, during each sampling and consensus operation  910 , the values of the sampling subset, Li, and the error of the inliers are stored, e.g., {S 1 , L 1 , E 1 } through {S M , L M , E M } will have been stored by the time the process goes to  914 . 
     At  914 , a sampling subset that produced the largest number of inliers (i.e., Lx) is selected. At  916 , non-inlier positioning sources are declared as outlier positioning sources. At  918 , the consistency group is defined as the set of positioning sources excluding the outlier positioning sources. At  920 , the UE position is computed using TOA values of positioning sources within the consistency group. 
     In  FIG. 9B , reporting  806  information about the consistency group and information about at least one of the one or more subsets of positioning sources within the consistency group to the network comprises, at  922 , reporting the membership of the consistency group, and at  924 , reporting the membership of at least one of the sampling subsets (and, optionally, Ii), and the error of the inliers associated with the sampling subset. In some aspects, the UE only reports those subsets having an error less than a reporting threshold T R . 
       FIG. 10  illustrates an example result of outlier detection  710 , in which a set of positioning sources U is analyzed, resulting in a consistency group G and a set of outliers O. Within the consistency group, several subsets S 1 -S 7  are identified. 
     In some aspects, the subsets may be the same size or may be different sizes. In  FIG. 10 , for example, S 4  is a small subset and S 7  is a big subset. In some aspects, a minimum number of subsets P may be configured as a reporting requirement. In some aspects, the value for P may depend upon the size of the set of positioning sources. In some aspects, the subsets may have to satisfy the same error threshold or different error thresholds. For  example, in some aspects, all subsets may have to satisfy the error threshold but the maximum deviation from the error threshold is reported. In some aspects, the detailed consistency errors of each link in the consistency group or subset may be reported. In some aspects, for each link in the consistency group or subset, its error with respect to the consensus, rather than to the threshold, may be reported; this may provide some benefits to model the error distribution more accurately. In some aspects, multiple thresholds may be configured, with the requirement that at least Pi subsets must meet a particular threshold. 
     Random. In some aspects, the membership of the subsets is chosen randomly from the members of set of positioning sources. In these aspects, the subset report identifies the membership of each subset. In some aspects, the network may instruct or configure the UE with the number of random subsets to be tried. 
     Pseudorandom. In some aspects, the membership of the subsets is chosen pseudo-randomly, e.g., according to a pseudorandom sequence (PRS) known to both the UE and the network. In these aspects, the UE may report the subsets as initial values for the pseudorandom number generator (PNG), i.e., the PNG “seed”, and offsets into the PRS generated, and various other parameters, e.g., to indicate the sizes of each subset, etc., with which the network can reconstruct the list of members of each subset. In some aspects, the network may provide the PNG seed value to the UE. 
     Predefined. In some aspects, the membership of the subsets is provided to the UE, e.g., by a location server. In some aspects, the UE can report which of these sets can be used to derive consistent measurements. In these aspects, the subset report may identify which of the predefined subsets are being reported by index, offset, key, field, or other identifier. In some aspects, the predefined subsets may be defined by an earlier UE report, by an RRC configuration from the base station or location server, or combinations thereof. In some aspects, the predefined subsets may be defined based on UE&#39;s hardware/RF configuration, as noted above. 
     In some aspects, a subset of the consistency group may be reported using the same report format used to report the consistency group. 
     In some aspects, where the subsets are randomly generated, each subset may be explicitly (e.g., fully or completely) described in the report. In some aspects, a subset may be described as a list of the positioning sources Pi that are within the subset, e.g., the sampling subset Si={P 1 , P 3 , P 9 , P 10 }, which themselves may be explicitly or implicitly  identified or described (e.g., by index or reference). In some aspects, a subset may be described using a list of the positioning sources that are not within the subset, e.g., the sampling subset Si=U−{P 4 , P 8 }. In some aspects, where the subsets are selected from a predefined list of subsets of positioning sources within set of positioning sources, the subsets may be identified by name, position or index in the list, etc., which the location server can use to determine the positioning sources within that subset. 
     In some aspects, a list of subsets may be reported differentially. In some aspects, nested subsets may be reported in order of increasing size, where the membership of the smallest subset is fully specified, and for each of the larger subsets, only the additional members of the larger subset is reported. 
     Referring again to  FIG. 10 , in one example S 5 ={A,B,C}, S 6 ={A,B,C,D,E}, and S 7 ={A,B,C,D,E,F}. In this example, the report format could be: 
     (S 5 :{A,B,C};  56 :+{D,E};  57 :+{F}) 
     
         
         In another example, where S 2 ={G,H,I,J,K,L} and S 3 ={I,J,K,L,M,N}, the report format could identify the intersection of the two sets (indicated by operator “∩”) and the membership of one set X that isn&#39;t in the other set Y (indicated by operator “X\Y”): 
       
    
     S 2 ∩S 3 :{I,J,K,L}; S 2 \S 3 :{G,H}; S 3 \S 2 :{M,N} 
     
         
         or a dummy subset Sx may be used, e.g.: 
       
    
     Sx:{I,J,K,L}; S 1 :Sx+{G,H}; S 2 :Sx+{M,N} 
     
         
         for example. These examples are not limiting, and illustrate the point that the size of a subset report may be reduced by differential reporting, other data compression methods, or combinations thereof. 
       
    
     In some aspects, the report format may depend on whether the report is carried on L1 (e.g., in an uplink control information (UCI) message), on L2 (e.g., in a MAC-CE), or on L3 (e.g., via RRC, LPP, etc.). In some aspects, the report format may depend on subset constraints described above. For example, where the subsets are grouped by different thresholds, subsets within each threshold may be reported differentially as a group. 
     In some aspects, a subset may be reported only if it satisfies a reporting threshold. For example, in some embodiments, the subset may be reported if a timing error for that threshold satisfies a threshold reporting value Tr. 
     In some aspects, subsets to be reported may be subject to constraints that limit how much one subset may overlap with another subset, e.g., how many positioning sources can be common to both subsets. For example, reporting two subsets that differ by only one  positioning source may be less useful than reporting two subsets that differ more substantially. In some aspects, two subsets differ substantially if the number of elements common to both subsets is less than a threshold number or threshold percentage of the number of elements in the subset. In some aspects, two subsets differ substantially if the number of elements not common to both subsets is greater than a threshold number of threshold percentage of the number of elements in the subset. In some aspects, the threshold number or threshold percentage may be the same for all subsets. In some aspects, the threshold number or threshold percentage may be different for different subsets, e.g., it may depend on the size of the subset. In some aspects, two subsets differ substantially if at least one of the subsets satisfies the criteria for non-overlap. In some aspects, two differ substantially only if both of the subsets satisfy the criteria for non-overlap. In  FIG. 10 , for example, the memberships of subsets S 2  and S 3  may not differ by a sufficient amount that both should be reported. In some aspects, one of the two sets (e.g., either S 2  or S 3 ) is reported. In some aspects, neither set is reported. In some aspects, such as where the relative timing errors of S 2  and S 3  are the same or sufficiently similar, a new set comprising the union of S 2  and S 3  may be reported. 
       FIG. 11  illustrates an exemplary method  1100  of wireless communication, according to aspects of the disclosure. In an aspect, method  1100  may be performed by a serving base station (e.g., any of the base stations  102  described herein). At  1102 , the base station receives, from a network entity, a set of positioning sources. In some aspects, the base station may comprise a gNodeB (gNB). In some aspects, the network entity may comprise a location server. In some aspects, the location server may comprise an LMF  270  or SLP  272 . In some aspects, the location server may be a component of, or co-located with, the base station. At  1104 , the base station transmits the set of positioning sources to a UE (e.g., any of the UEs  104  described herein). In some aspects, the set of positioning sources may be transmitted to the UE via RRC or LLP. 
     At  1106 , the base station may optionally receive, from the network entity, a predefined list of subsets of positioning sources within the set of positioning sources. The positioning sources within a particular subset may be identified explicitly (e.g., by cell identifier, TRP identifier, etc.) or implicitly (e.g., by an index into a predefined list already known to the base station and UE, and at  1108 , the base station may optionally transmit the predefined list of subsets of positioning sources to the UE.  
     At  1110 , the base station receives, from the UE, information about a consistency group comprising one or more positioning sources within the set of positioning sources, as well as information about at least one subset of the positioning sources within the consistency group. In some aspects, the information includes an average timing error for the subset. At  1112 , the base station sends, to the network entity, the information received from the UE, i.e., the consistency group and the one or more subsets. 
     In some aspects, the time-angle metric may include a TOA, an AoA, a ZoA, a TDOA, a ToD, an AoD, a ZoD, a RSTD, a RSRP, a RTT, or a combination thereof In some aspects, the error threshold may include a time-angle threshold. In some aspects, the time-angle threshold may include a timing threshold, an angle threshold, a received power threshold, or a combination thereof. In some aspects, the error threshold may include multiple time-angle thresholds. In some aspects, each member of the consistency group must satisfy at least one of the multiple time-angle thresholds. In some aspects, each member of the consistency group must satisfy all of the multiple time-angle thresholds. In some aspects, the method may include, prior to receiving information about a consistency group and information about at least one of the subsets of positioning sources within the consistency group from the UE, receiving, from the network entity, a predefined list of subsets of positioning sources within the set of positioning sources, and sending, to the UE, the predefined list of subsets. 
     In some aspects, the network entity may include a location server. In some aspects, the location server may include a location management function (LMF) or a secure user plane location (SUPL) location platform (SLP). In some aspects, the base station may include a gNodeB (gNB). 
     In some aspects, the information about at least one of the subsets of positioning sources within the consistency group may include an average error for the at least one subset. In some aspects, receiving, from the UE, information about at least one of the subsets of positioning sources within the consistency group may include receiving information identifying the positioning sources included in each subset. In some aspects, the positioning sources included in each subset are identified completely or differentially, explicitly or implicitly, by index or reference, or combinations thereof. In some aspects, receiving, from the UE, information about at least one of the subsets of positioning sources within the consistency group may include receiving an error associated with each sub set.  
     In some aspects, receiving, from the UE, information about at least one of the subsets may include receiving information identifying an error for each positioning source included in the subset. In some aspects, receiving information identifying an error for each positioning source included in the subset may include receiving information identifying the error for each positioning source with respect to the error threshold, with respect to a consensus value produced by the subset, or combinations thereof. In some aspects, receiving, from the UE, information about at least one of the subsets of positioning sources within the consistency group may include receiving information on subsets having an error that satisfies a threshold reporting value Tr. 
       FIG. 12  illustrates an exemplary method  1200  of wireless communication, according to aspects of the disclosure. In an aspect, method  1200  may be performed by a network entity, which may comprise a location server. At  1202 , the network entity transmits, to a base station, a set of positioning sources. At  1204 , the network entity optionally transmits, to the BS, a predefined list of subsets of positioning sources. At  1206 , the network entity receives, from the BS, information defining a consistency group and information about at least one subset of positioning sources within consistency group. In some aspects, the information includes an average timing error for the subset. 
     In some aspects, the time-angle metric may include a TOA, an AoA, a ZoA, a TDOA, a ToD, an AoD, a ZoD, a RSTD, a RSRP, a RTT, or a combination thereof. In some aspects, the error threshold may include a time-angle threshold. In some aspects, the time-angle threshold may include a timing threshold, an angle threshold, a received power threshold, or combinations thereof. In some aspects, the error threshold may include multiple time-angle thresholds. In some aspects, each member of the consistency group must satisfy at least one of the multiple time-angle thresholds. In some aspects, each member of the consistency group must satisfy all of the multiple time-angle thresholds. In some aspects, the method may include, prior to receiving the information about the consistency group and information about at least one of the subsets of positioning sources within the consistency group, sending, to the base station, a predefined list of subsets of subsets of positioning sources within the consistency group. In some aspects, the network entity may include a location server. In some aspects, the location server may include an LMF or an SLP. 
     RAN1 NR may define UE measurements on DL reference signals (e.g., for serving, reference, and/or neighboring cells) applicable for NR positioning, including DL  reference signal time difference (RSTD) measurements for NR positioning, DL RSRP measurements for NR positioning, and UE Rx-Tx (e.g., a hardware group delay from signal reception at UE receiver to response signal transmission at UE transmitter, e.g., for time difference measurements for NR positioning, such as RTT). 
     RAN1 NR may define gNB measurements based on UL reference signals applicable for NR positioning, such as relative UL time of arrival (RTOA) for NR positioning, UL AoA measurements (e.g., including Azimuth and Zenith Angles) for NR positioning, UL RSRP measurements for NR positioning, and gNB Rx-Tx (e.g., a hardware group delay from signal reception at gNB receiver to response signal transmission at gNB transmitter, e.g., for time difference measurements for NR positioning, such as RTT). 
       FIG. 13  is a diagram  1300  showing exemplary timings of RTT measurement signals exchanged between a base station  1302  (e.g., any of the base stations described herein) and a UE  1304  (e.g., any of the UEs described herein), according to aspects of the disclosure. In the example of  FIG. 13 , the base station  1302  sends an RTT measurement signal  1310  (e.g., PRS, NRS, CRS, CSI-RS, etc.) to the UE  1304  at time t 1 . The RTT measurement signal  1310  has some propagation delay T Prop  as it travels from the base station  1302  to the UE  1304 . At time t 2  (the TOA of the RTT measurement signal  1310  at the UE  1304 ), the UE  1304  receives/measures the RTT measurement signal  1310 . After some UE processing time, the UE  1304  transmits an RTT response signal  1320  at time t 3 . After the propagation delay T Prop , the base station  1302  receives/measures the RTT response signal  1320  from the UE  1304  at time t 4  (the TOA of the RTT response signal  1320  at the base station  1302 ). 
     In order to identify the TOA (e.g., t 2 ) of a reference signal (e.g., an RTT measurement signal  1310 ) transmitted by a given network node (e.g., base station  1302 ), the receiver (e.g., UE  1304 ) first jointly processes all the resource elements (REs) on the channel on which the transmitter is transmitting the reference signal, and performs an inverse Fourier transform to convert the received reference signals to the time domain. The conversion of the received reference signals to the time domain is referred to as estimation of the channel energy response (CER). The CER shows the peaks on the channel over time, and the earliest “significant” peak should therefore correspond to the TOA of the reference signal. Generally, the receiver will use a noise-related quality threshold to filter out spurious local peaks, thereby presumably correctly identifying significant peaks on the channel. For example, the receiver may choose a TOA estimate that is the earliest local  maximum of the CER that is at least X dB higher than the median of the CER and a maximum Y dB lower than the main peak on the channel. The receiver determines the CER for each reference signal from each transmitter in order to determine the TOA of each reference signal from the different transmitters. 
     In some designs, the RTT response signal  1320  may explicitly include the difference between time t 3  and time t 2  (i.e., T Rx→Tx    1312 ). Using this measurement and the difference between time t 4  and time t 1  (i.e., T Tx→Rx    1322 ), the base station  1302  (or other positioning entity, such as location server  230 , LMF  270 ) can calculate the distance to the UE  1304  as: 
     
       
         
           
             d 
             = 
             
               
                 
                   1 
                   
                     2 
                     ⁢ 
                     c 
                   
                 
                 ⁢ 
                 
                   ( 
                   
                     
                       T 
                       
                         Tx 
                         → 
                         Rx 
                       
                     
                     - 
                     
                       T 
                       
                         Rx 
                         → 
                         Tx 
                       
                     
                   
                   ) 
                 
               
               = 
               
                 
                   
                     1 
                     
                       2 
                       ⁢ 
                       c 
                     
                   
                   ⁢ 
                   
                     ( 
                     
                       
                         t 
                         2 
                       
                       - 
                       
                         t 
                         1 
                       
                     
                     ) 
                   
                 
                 - 
                 
                   
                     1 
                     
                       2 
                       ⁢ 
                       c 
                     
                   
                   ⁢ 
                   
                     ( 
                     
                       
                         t 
                         4 
                       
                       - 
                       
                         t 
                         3 
                       
                     
                     ) 
                   
                 
               
             
           
         
       
         
         where c is the speed of light. While not illustrated expressly in  FIG. 13 , an additional source of delay or error may be due to UE and gNB hardware group delay for position location. 
       
    
     An additional source of delay or error is due to UE and gNB group delay (e.g., timing group delay, which may include a hardware group delay, a group delay attributable to software/firmware, or both) for position location.  FIG. 14  illustrates a diagram  1400  showing exemplary timings of RTT measurement signals exchanged between a base station (gNB) (e.g., any of the base stations described herein) and a UE (e.g., any of the UEs described herein), according to aspects of the disclosure.  1410 -  1422  of  FIG. 14  is similar in some respects to  1310 -  1322 , respectively, of  FIG. 13 . However, in  FIG. 14 , the UE and gNB group delay (which is primarily due to internal hardware delays between a baseband (BB) component and antenna (ANT) at the UE and gNB) is shown with respect  1430  and  1440 . As will be appreciated, both Tx-side and Rx-side path-specific or beam-specific delays impact the RTT measurement. Group delays such as  1430  and  1440  can contribute to timing errors and/or calibration errors that can impact RTT as well as other measurements such as TDOA, RSTD, and so on, which in turn can impact positioning performance. For example, in some designs, 10 nsec of error will introduce the 3 meter of error in the final fix. 
     As noted above, various types of NR positioning may be implemented, including DL-TDOA, UL-TDOA, RTT and differential RTT. Each NR positioning technique has particular advantages and disadvantages, as shown in Table 2:  
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE 2 
               
               
                   
               
               
                 Positioning 
                 gNB Synch 
                 Tx error 
                 Rx error 
                 Tx error 
                 Rx error 
               
               
                 Technique 
                 error 
                 at gNB 
                 at gNB 
                 at UE 
                 at UE 
               
               
                   
               
             
            
               
                 DL-TDOA 
                 Yes 
                 Yes 
                 N/A 
                 N/A 
                 No 
               
               
                 UL-TDOA 
                 Yes 
                 N/A 
                 Yes 
                 No 
                 N/A 
               
               
                 RTT 
                 No 
                 Yes 
                 Yes 
                 Yes 
                 Yes 
               
               
                 Differential 
                 No 
                 Yes 
                 Yes 
                 No 
                 No 
               
               
                 RTT 
               
               
                   
               
            
           
         
       
     
     With reference to Table 2, DL-TDOA and UL-TDOA are TDOA-based techniques (e.g., RSTD) that provide multi-lateral positioning-based RSTD of multiple cells with respect to a reference cell. Multi-RTT measurement that is TOA-based and provides true range multi-lateration positioning. Differential RTT is a type of multi-RTT positioning, whereby RSTD is calculated from RTT Rx-Tx measurements. In some designs, differential RTT may be used to eliminate calibration errors at the UE (e.g., if all RTT measurements are associated with the same Rx/Tx calibration error at UE). However, different panels, beams, RF chains, etc. may be associated with different Tx or Rx timing group delays. In this case, differential RTT may not be capable of eliminating the UE timing group delays. 
     As noted above, in some designs, consistency groups may be defined by the UE for Tx and/or Rx timing group delays for UE-assisted position estimation, with a network entity (e.g., LMF integrated at BS or at core network) selecting a subset of measurements that belong to particular consistency group(s) for deriving a positioning estimate of a UE. In other designs as noted above, consistency groups may be defined by UE/gNB hardware configuration and/or outlier detection for UE-based position estimation, etc. Consistency groups may also be defined at least in part based on other error metrics, such as angle bias, as noted above. 
     However, one disadvantage may occur where the UE may prefer to measure and report the PRS within one consistency group as much as possible to reduce the impact of group delay (e.g., in some designs, within a consistency group, the group delay at UE can be eliminated). For example, assume that a UE has two panels (panels 1 and 2), and thus potentially two group delays. The UE may take the strategy to measure all the PRSs with panel 1, yet some PRS might have better SINR or more accurate TOA measurement with  panel 2. This may reduce the overall positioning accuracy. Another problem is that the UE may report PRSs with different consistency groups, but different consistency groups may have similar group delays within a reasonable tolerance. The UE itself may not be able to calibrate the groups delays via OTA calibration, and thus may not be aware of this. 
     Aspects of the disclosure are thereby directed to a network entity (e.g., LMF) that instructs a UE to modify one or more parameters associated with a plurality of consistency groups. Such aspects may provide various technical advantages, such as more accurate position estimation of a UE, particularly in a scenario where the LMF is in a better position to assess group delay (e.g., because LMF may receive measurement reports from both the UE as well as a number of gNBs involved with the position estimation). 
       FIG. 15  illustrates an exemplary process  1500  of wireless communication, according to aspects of the disclosure. In an aspect, the process  1500  may be performed by a UE, which may correspond to a UE such as UE  302 . 
     At  1510 , UE  302  (e.g., positioning component  342 , processing system  332 , etc.) identifies, by the UE, a plurality of consistency groups. As noted above, each of the plurality of consistency groups may include a plurality of positioning sources (e.g., PRS resource, PRS resource set, PRS frequency layer, TRP, RF chains, panels, TRPs, etc., e.g., in some designs, the consistency group may consist only of positioning sources that correspond to one or more of PRS resource, PRS resource set, PRS frequency layer, TRP, RF chains, panels, and/or TRPs) associated with measurements within one or more shared error characteristics (e.g., within a particular threshold value from each other, and/or within a particular range, etc.) for the respective consistency group. For example, the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof, as described above (e.g., a shared time-angle metric or error range/threshold related to one or more of a TOA, an AoA, a ZoA, a TDOA, a ToD, an AoD, a ZoD, a RSTD, a RSRP, a RTT, etc.). In an example, a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources may be capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold. In an example, the plurality of consistency groups may be configured by UE  302  based on information known to UE  302  (e.g., PRS resource, PRS resource set, PRS frequency layer, TRP, RF chains, panels, TRPs, etc.). For example, the plurality of  consistency groups may include PRSs 1-3 in association with a first consistency group with consistency group ID#1, PRS 4 in association with a second consistency group with consistency group ID#2, and PRSs 5-6 in association with a third consistency group with consistency group ID#3. 
     At  1520 , UE  302  (e.g., transmitter  314  or  324 , etc.) reports, to a position estimation entity, information associated with the plurality of consistency groups. For example, the information may include error values and/or error value ranges associated with the consistency groups and/or particular positioning resources, the shared error metric(s) of particular consistency groups, and so on. In an example where the position estimation entity corresponds to UE  302  itself (e.g., UE-based positioning), then the report may be transferred logically from one UE component to another UE component over a data bus. 
     At  1530 , UE  302  (e.g., receiver  312  or  322 , etc.) receives, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups. In an aspect, UE  302  may then modify the parameter(s) in accordance with the instruction (e.g., separate group(s), merge group(s), define new group(s), delete group(s), etc.). In an example where the position estimation entity corresponds to UE  302  itself (e.g., UE-based positioning), then the instruction may be transferred logically from one UE component to another UE component over a data bus. 
       FIG. 16  illustrates an exemplary process  1600  of wireless communication, according to aspects of the disclosure. In an aspect, the process  1600  may be performed by a position estimation entity, which may correspond to a UE such as UE  302  (e.g., for UE-based positioning), a BS or gNB such as BS  304  (e.g., for LMF integrated in RAN for UE-assisted approach), or a network entity  306  (e.g., core network component such as an LMF, position determination entity, location server or other network entity for UE-assisted approach). In some designs, the process  1500  of  FIG. 15  may be performed in conjunction with the process  1600  of  FIG. 16  (e.g., the position estimation entity referenced in the process  1500  of  FIG. 15  may correspond to the position estimation entity performing the process  1600  of  FIG. 16 , and the UE referenced in the process  1600  of  FIG. 16  may correspond to the UE performing the process  1500  of  FIG. 15 ). 
     At  1610 , the position estimation entity (e.g., receiver  312  or  322  or  352  or  362 , data bus  382 , network interface(s)  380  or  390 , etc.) receives, from a UE, information associated with a plurality of consistency groups. For example, the information may include error values and/or error value ranges associated with the consistency groups and/or particular  positioning resources, the shared error metric(s) of particular consistency groups, and so on. As noted above, each of the plurality of consistency groups may include a plurality of positioning sources (e.g., PRS resource, PRS resource set, PRS frequency layer, TRP, RF chains, panels, beams, TRPs, etc.) associated with measurements within one or more shared error characteristics for the respective consistency group. For example, the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof, as described above (e.g., a shared time-angle metric or error range/threshold related to one or more of a TOA, an AoA, a ZoA, a TDOA, a ToD, an AoD, a ZoD, a RSTD, a RSRP, a RTT, etc.). In an example, a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources may be capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold. In an example, the plurality of consistency groups may be configured by the UE based on information known to the UE (e.g., PRS resource, PRS resource set, PRS frequency layer, TRP, RF chains, panels, TRPs, etc.). For example, the plurality of consistency groups may include PRSs 1-3 in association with a first consistency group with consistency group ID#1, PRS 4 in association with a second consistency group with consistency group ID#2, and PRSs 5-6 in association with a third consistency group with consistency group ID#3. In an example where the position estimation entity corresponds to UE  302  itself (e.g., UE-based positioning), then the information may be received logically at one UE component from another UE component over a data bus. 
     At  1620 , the position estimation entity (e.g., transmitter  314  or  324 , data bus  382 , network interface(s)  380  or  390 , etc.) transmits, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. In an example where the position estimation entity corresponds to UE  302  itself (e.g., UE-based positioning), then the transmission of the instruction may be transferred logically from one UE component to another UE component over a data bus. 
     Referring to  FIGS. 15-16 , in some designs, the instruction at  1530  or  1620  may be transported within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Referring to  FIGS. 15-16 , in some designs, the instruction may instruct the UE to merge two or more of the plurality of consistency groups into a merged consistency group. The UE may then perform various actions with respect to the merged consistency group. For  example, the UE may prefer to measure and report RTT based on SINR condition with the merged consistency group instead of the previous consistency groups. For example, the UE may compensate for calibration error of one or more PRS measurements associated with the merged consistency group based on a compensation parameter for the merged consistency group (e.g., the compensation parameter may be received at UE from network component), or may report the one or more calibration error-compensated PRS measurements to the position estimation entity, or may add a PRS compensation indicator and/or PRS measurement calibration value into one or more measurement reports, or a combination thereof. 
     Referring to  FIGS. 15-16 , in some designs, the UE may transmit a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively. For example, assume that three consistency groups are associated with consistency group identifiers #1, #2 and #3, and then merged into a merged consistency group. In this case, the three consistency groups may be individually identified in the first measurement report via consistency group identifiers #1, #2 and #3. In other designs, the UE may transmit a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. For example, assume that three consistency groups are associated with consistency group identifiers #1, #2 and #3, and then merged into a merged consistency group associated with a consistency group identifier #4. In this case, the three consistency groups may be identified in the first measurement report via consistency group identifier #4. 
     Referring to  FIGS. 15-16 , in some designs, the position estimation entity may receive receiving measurement reports associated with a positioning session of the UE from the UE and one or more base stations, and may perform OTA calibration of UE group delay and base station group delay based on the measurement reports, or outlier detection (e.g., as in  FIG. 7 , etc.), or a combination thereof. The position estimation entity may further identify a new grouping of the plurality of consistency groups based on the OTA calibration. In this case, the instruction at  1530  or  1620  may instruct the UE to transition to the new grouping. As an example, the position estimation entity may conduct calibration to derive the UE&#39;s group delays and/or difference across different consistency groups. The position estimation entity may further conduct outlier rejection (e.g.,  RANSAC) to estimate the group delay difference or results between consistency groups. Such aspects may provide the position estimation entity with more detailed knowledge regarding the group delays of consistency groups, differences between consistency groups, consistency results (e.g., such as a binary classification, with results either being considered consistent or inconsistent) based on an outlier rejection threshold, or (as noted above) determination of a new consistency group (e.g., merger of a subset of consistency groups into a merged consistency group). 
     Referring to  FIGS. 15-16 , in some designs, the instruction at  1530  or  1620  may instruct the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Referring to  FIGS. 15-16 , in some designs, the instruction at  1530  or  1620  may instruct the UE to modify the error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Referring to  FIGS. 15-16 , in some designs, the instruction at  1530  or  1620  may instruct the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Referring to  FIGS. 15-16 , in some designs, the instruction at  1530  or  1620  may instruct the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Referring to  FIGS. 15-16 , in some designs, the instruction at  1530  or  1620  may instruct the UE to separate one of the plurality of consistency groups into two or more new consistency groups. 
     Referring to  FIGS. 15-16 , in some designs, the error threshold for each of the plurality of consistency groups comprises a timing threshold (e.g., TOA or TDOA), an angle threshold (e.g., AoD or AoA), a received power threshold (e.g., RSTD), or a combination thereof. 
     Referring to  FIGS. 15-16 , in some designs, the plurality of positioning sources for each of the plurality of consistency groups comprises a PRS resource, a PRS resource set, a PRS frequency layer, a TRP, or a combination thereof. 
     In the detailed description above it can be seen that different features are grouped together in examples. This manner of disclosure should not be understood as an intention that the example clauses have more features than are explicitly mentioned in each clause. Rather,  the various aspects of the disclosure may include fewer than all features of an individual example clause disclosed. Therefore, the following clauses should hereby be deemed to be incorporated in the description, wherein each clause by itself can stand as a separate example. Although each dependent clause can refer in the clauses to a specific combination with one of the other clauses, the aspect(s) of that dependent clause are not limited to the specific combination. It will be appreciated that other example clauses can also include a combination of the dependent clause aspect(s) with the subject matter of any other dependent clause or independent clause or a combination of any feature with other dependent and independent clauses. The various aspects disclosed herein expressly include these combinations, unless it is explicitly expressed or can be readily inferred that a specific combination is not intended (e.g., contradictory aspects, such as defining an element as both an insulator and a conductor). Furthermore, it is also intended that aspects of a clause can be included in any other independent clause, even if the clause is not directly dependent on the independent clause. 
     Implementation examples are described in the following numbered clauses: 
     Clause 1. A method of operating a user equipment (UE), comprising: identifying, by the UE, a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources, with a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources being capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold; reporting, to a position estimation entity, information associated with the plurality of consistency groups; and receiving, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Clause 2. The method of clause 1, wherein the instruction is received within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 3. The method of any of clauses 1 to 2, wherein the instruction instructs the UE to: merge two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 4. The method of clause 3, further comprising: compensating one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or reporting the one or more  calibration error-compensated PRS measurements to the position estimation entity, or adding a PRS compensation indicator and/or PRS measurement calibration value into one or more measurement reports, or a combination thereof. 
     Clause 5. The method of any of clauses 3 to 4, further comprising: transmitting a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or transmitting a second measurement report based on second PRS measurement associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 6. The method of any of clauses 1 to 5, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 7. The method of any of clauses 1 to 6, wherein the instruction instructs the UE to modify the error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 8. The method of any of clauses 1 to 7, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 9. The method of any of clauses 1 to 8, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 10. The method of any of clauses 1 to 9, wherein the instruction instructs the UE to: separate one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 11. The method of any of clauses 1 to 10, wherein the error threshold for each of the plurality of consistency groups comprises a timing threshold, an angle threshold, a received power threshold, or a combination thereof. 
     Clause 12. The method of any of clauses 1 to 11, wherein the plurality of positioning sources for each of the plurality of consistency groups comprises a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or a combination thereof.  
     Clause 13. A method of operating a network component, comprising: receiving, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources, with a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources being capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold; and transmitting, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Clause 14. The method of clause 13, further comprising: receiving measurement reports associated with a positioning session of the UE from the UE and one or more base stations; performing over-the-air (OTA) calibration of UE group delay and base station group delay based on the measurement reports; identifying a new grouping of the plurality of consistency groups based on the OTA calibration, wherein the instruction instructs the UE to transition to the new grouping. 
     Clause 15. The method of any of clauses 13 to 14, wherein the instruction is transmitted within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 16. The method of any of clauses 13 to 15, wherein the instruction instructs the UE to: merge two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 17. The method of clause 16, wherein the instruction further instructs the UE to compensate one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or report the one or more compensated PRS measurements to a position estimation entity, or add a PRS compensation indicator and/or PRS measurement calibration value into one or more measurement reports, or a combination thereof. 
     Clause 18. The method of any of clauses 16 to 17, further comprising: receiving a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or receiving a second measurement report based on second PRS measurement associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group.  
     Clause 19. The method of any of clauses 13 to 18, wherein the instruction instructs the UE to: separate one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 20. The method of any of clauses 13 to 19, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 21. The method of any of clauses 13 to 20, wherein the instruction instructs the UE to modify the error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 22. The method of any of clauses 13 to 21, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 23. The method of any of clauses 13 to 22, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 24. An apparatus comprising a memory and at least one processor communicatively coupled to the memory, the memory and the at least one processor configured to perform a method according to any of clauses 1 to 23. 
     Clause 25. An apparatus comprising means for performing a method according to any of clauses 1 to 23. 
     Clause 26. A non-transitory computer-readable medium storing computer-executable instructions, the computer-executable comprising at least one instruction for causing a computer or processor to perform a method according to any of clauses 1 to 23. 
     Additional implementation examples are described in the following numbered clauses: 
     Clause 1. A method of operating a user equipment (UE), comprising: identifying, by the UE, a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; reporting, to a position estimation entity, information associated with the plurality of consistency groups; and receiving, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups.  
     Clause 2. The method of clause 1, wherein the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof. 
     Clause 3. The method of any of clauses 1 to 2, wherein the instruction is received within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 4. The method of any of clauses 1 to 3, wherein the instruction instructs the UE to: merge two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 5. The method of clause 4, further comprising: compensating one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or reporting the one or more calibration error-compensated PRS measurements to the position estimation entity, or adding a PRS compensation indicator, a PRS measurement calibration value, or both, into one or more measurement reports, or a combination thereof. 
     Clause 6. The method of any of clauses 4 to 5, further comprising: transmitting a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or transmitting a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 7. The method of any of clauses 1 to 6, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 8. The method of any of clauses 1 to 7, wherein the instruction instructs the UE to modify an error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 9. The method of any of clauses 1 to 8, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 10. The method of any of clauses 1 to 9, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first  merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 11. The method of any of clauses 1 to 10, wherein the instruction instructs the UE to: separate one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 12. The method of any of clauses 1 to 11, wherein a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources is capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold. 
     Clause 13. The method of clause 12, wherein the error threshold for each of the plurality of consistency groups comprises a timing threshold, an angle threshold, a received power threshold, or a combination thereof. 
     Clause 14. The method of any of clauses 1 to 13, wherein the plurality of positioning sources for each of the plurality of consistency groups comprises a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or a combination thereof. 
     Clause 15. A method of operating a network component, comprising: receiving, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; and transmitting, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Clause 16. The method of clause 15, wherein the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof. 
     Clause 17. The method of any of clauses 15 to 16, further comprising: receiving measurement reports associated with a positioning session of the UE from the UE and one or more base stations; performing over-the-air (OTA) calibration of UE group delay and base station group delay based on the measurement reports, or outlier detection, or a combination thereof; and identifying a new grouping of the plurality of consistency groups based on the OTA calibration, wherein the instruction instructs the UE to transition to the new grouping.  
     Clause 18. The method of any of clauses 15 to 17, wherein the instruction is transmitted within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 19. The method of any of clauses 15 to 18, wherein the instruction instructs the UE to: merge two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 20. The method of clause 19, wherein the instruction further instructs the UE to compensate one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or report the one or more compensated PRS measurements to a position estimation entity, or add a PRS compensation indicator, a PRS measurement calibration value, or both, into one or more measurement reports, or a combination thereof. 
     Clause 21. The method of any of clauses 19 to 20, further comprising: receiving a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or receiving a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 22. The method of any of clauses 15 to 21, wherein the instruction instructs the UE to: separate one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 23. The method of any of clauses 15 to 22, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 24. The method of any of clauses 15 to 23, wherein a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources is capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold, and wherein the instruction instructs the UE to modify the error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group.  
     Clause 25. The method of any of clauses 15 to 24, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 26. The method of any of clauses 15 to 25, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 27. A user equipment (UE), comprising: a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to: identify a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; report, to a position estimation entity, information associated with the plurality of consistency groups; and receive, via the at least one transceiver, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Clause 28. The UE of clause 27, wherein the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof. 
     Clause 29. The UE of any of clauses 27 to 28, wherein the instruction is received within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 30. The UE of any of clauses 27 to 29, wherein the instruction instructs the UE to: merge two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 31. The UE of clause 30, wherein the at least one processor is further configured to: compensate one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or report the one or more compensated PRS measurements to a position estimation entity, or add a PRS compensation indicator, a PRS measurement calibration value, or both, into one or more measurement reports, or a combination thereof 
     Clause 32. The UE of any of clauses 30 to 31, wherein the at least one processor is further configured to: transmit, via the at least one transceiver, a first measurement report based on first PRS measurements associated with the merged consistency group in association  with two or more consistency group identifiers of two or more consistency groups, respectively, or transmit, via the at least one transceiver, a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 33. The UE of any of clauses 27 to 32, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 34. The UE of any of clauses 27 to 33, wherein the instruction instructs the UE to modify an error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 35. The UE of any of clauses 27 to 34, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 36. The UE of any of clauses 27 to 35, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 37. The UE of any of clauses 27 to 36, wherein the instruction instructs the UE to: separate one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 38. The UE of any of clauses 27 to 37, wherein a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources is capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold. 
     Clause 39. The UE of clause 38, wherein the error threshold for each of the plurality of consistency groups comprises a timing threshold, an angle threshold, a received power threshold, or a combination thereof. 
     Clause 40. The UE of any of clauses 27 to 39, wherein the plurality of positioning sources for each of the plurality of consistency groups comprises a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or a combination thereof. 
     Clause 41. A network component, comprising: a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one  transceiver, the at least one processor configured to: receive, via the at least one transceiver, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; and transmit, via the at least one transceiver, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Clause 42. The network component of clause 41, wherein the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof. 
     Clause 43. The network component of any of clauses 41 to 42, wherein the at least one processor is further configured to: receive, via the at least one transceiver, measurement reports associated with a positioning session of the UE from the UE and one or more base stations; perform over-the-air (OTA) calibration of UE group delay and base station group delay based on the measurement reports, or outlier detection, or a combination thereof and identify a new grouping of the plurality of consistency groups based on the OTA calibration, wherein the instruction instructs the UE to transition to the new grouping. 
     Clause 44. The network component of any of clauses 41 to 43, wherein the instruction is transmitted within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 45. The network component of any of clauses 41 to 44, wherein the instruction instructs the UE to: merge two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 46. The network component of clause 45, wherein the instruction further instructs the UE to compensate one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or report the one or more compensated PRS measurements to a position estimation entity, or add a PRS compensation indicator, a PRS measurement calibration value, or both, into one or more measurement reports, or a combination thereof. 
     Clause 47. The network component of any of clauses 45 to 46, wherein the at least one processor is further configured to: receive, via the at least one transceiver, a first measurement report based on first PRS measurements associated with the merged  consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or receive, via the at least one transceiver, a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 48. The network component of any of clauses 41 to 47, wherein the instruction instructs the UE to: separate one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 49. The network component of any of clauses 41 to 48, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 50. The network component of any of clauses 41 to 49, wherein a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources is capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold, and wherein the instruction instructs the UE to modify the error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 51. The network component of any of clauses 41 to 50, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 52. The network component of any of clauses 41 to 51, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 53. A user equipment (UE), comprising: means for identifying a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; means for reporting, to a position estimation entity, information associated with the plurality of consistency groups; and means for receiving, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups.  
     Clause 54. The UE of clause 53, wherein the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof. 
     Clause 55. The UE of any of clauses 53 to 54, wherein the instruction is received within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 56. The UE of any of clauses 53 to 55, wherein the instruction instructs the UE to: means for merging two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 57. The UE of clause 56, further comprising: means for compensating one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or means for reporting the one or more calibration error-compensated PRS measurements to the position estimation entity, or means for adding a PRS compensation indicator, a PRS measurement calibration value, or both, into one or more measurement reports, or a combination thereof. 
     Clause 58. The UE of any of clauses 56 to 57, further comprising: means for transmitting a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or means for transmitting a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 59. The UE of any of clauses 53 to 58, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 60. The UE of any of clauses 53 to 59, wherein the instruction instructs the UE to modify an error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 61. The UE of any of clauses 53 to 60, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group.  
     Clause 62. The UE of any of clauses 53 to 61, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 63. The UE of any of clauses 53 to 62, wherein the instruction instructs the UE to: means for separating one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 64. The UE of any of clauses 53 to 63, wherein a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources is capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold. 
     Clause 65. The UE of clause 64, wherein the error threshold for each of the plurality of consistency groups comprises a timing threshold, an angle threshold, a received power threshold, or a combination thereof. 
     Clause 66. The UE of any of clauses 53 to 65, wherein the plurality of positioning sources for each of the plurality of consistency groups comprises a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or a combination thereof. 
     Clause 67. A network component, comprising: means for receiving, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; and means for transmitting, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Clause 68. The network component of clause 67, wherein the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof. 
     Clause 69. The network component of any of clauses 67 to 68, further comprising: means for receiving measurement reports associated with a positioning session of the UE from the UE and one or more base stations; means for performing over-the-air (OTA) calibration of UE group delay and base station group delay based on the measurement reports, or outlier detection, or a combination thereof; and means for identifying a new  grouping of the plurality of consistency groups based on the OTA calibration, wherein the instruction instructs the UE to transition to the new grouping. 
     Clause 70. The network component of any of clauses 67 to 69, wherein the instruction is transmitted within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 71. The network component of any of clauses 67 to 70, wherein the instruction instructs the UE to: means for merging two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 72. The network component of clause 71, wherein the instruction further instructs the UE to compensate one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or report the one or more compensated PRS measurements to a position estimation entity, or add a PRS compensation indicator, a PRS measurement calibration value, or both, into one or more measurement reports, or a combination thereof 
     Clause 73. The network component of any of clauses 71 to 72, further comprising: means for receiving a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or means for receiving a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 74. The network component of any of clauses 67 to 73, wherein the instruction instructs the UE to: means for separating one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 75. The network component of any of clauses 67 to 74, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 76. The network component of any of clauses 67 to 75, wherein a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources is capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold, and  wherein the instruction instructs the UE to modify the error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 77. The network component of any of clauses 67 to 76, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 78. The network component of any of clauses 67 to 77, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 79. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a user equipment (UE), cause the UE to: identify a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; report, to a position estimation entity, information associated with the plurality of consistency groups; and receive, from the position estimation entity, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Clause 80. The non-transitory computer-readable medium of clause 79, wherein the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof. 
     Clause 81. The non-transitory computer-readable medium of any of clauses 79 to 80, wherein the instruction is received within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling. 
     Clause 82. The non-transitory computer-readable medium of any of clauses 79 to 81, wherein the instruction instructs the UE to: merge two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 83. The non-transitory computer-readable medium of clause 82, further comprising computer-executable instructions that, when executed by the UE, cause the UE to: compensate one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or report the one or more compensated PRS measurements to a position estimation  entity, or add a PRS compensation indicator, a PRS measurement calibration value, or both, into one or more measurement reports, or a combination thereof 
     Clause 84. The non-transitory computer-readable medium of any of clauses 82 to 83, further comprising computer-executable instructions that, when executed by the UE, cause the UE to: transmit a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or transmit a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 85. The non-transitory computer-readable medium of any of clauses 79 to 84, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 86. The non-transitory computer-readable medium of any of clauses 79 to 85, wherein the instruction instructs the UE to modify an error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 87. The non-transitory computer-readable medium of any of clauses 79 to 86, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 88. The non-transitory computer-readable medium of any of clauses 79 to 87, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Clause 89. The non-transitory computer-readable medium of any of clauses 79 to 88, wherein the instruction instructs the UE to: separate one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 90. The non-transitory computer-readable medium of any of clauses 79 to 89, wherein a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources is capable of estimating second  positioning measurements from a second subset of the plurality of positioning sources within an error threshold. 
     Clause 91. The non-transitory computer-readable medium of clause 90, wherein the error threshold for each of the plurality of consistency groups comprises a timing threshold, an angle threshold, a received power threshold, or a combination thereof. 
     Clause 92. The non-transitory computer-readable medium of any of clauses 79 to 91, wherein the plurality of positioning sources for each of the plurality of consistency groups comprises a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, a transmission/reception point (TRP), or a combination thereof. 
     Clause 93. A non-transitory computer-readable medium storing computer-executable instructions that, when executed by a network component, cause the network component to: receive, from a user equipment (UE), information associated with a plurality of consistency groups, each of the plurality of consistency groups comprising a plurality of positioning sources associated with measurements within one or more shared error characteristics for the respective consistency group; and transmit, to the UE, an instruction to modify one or more parameters associated with the plurality of consistency groups. 
     Clause 94. The non-transitory computer-readable medium of clause 93, wherein the one or more shared error characteristics comprise a shared timing error characteristic, a shared angle error characteristic, or a combination thereof. 
     Clause 95. The non-transitory computer-readable medium of any of clauses 93 to 94, further comprising computer-executable instructions that, when executed by the network component, cause the network component to: receive measurement reports associated with a positioning session of the UE from the UE and one or more base stations; perform over-the-air (OTA) calibration of UE group delay and base station group delay based on the measurement reports, or outlier detection, or a combination thereof; and identify a new grouping of the plurality of consistency groups based on the OTA calibration, wherein the instruction instructs the UE to transition to the new grouping. 
     Clause 96. The non-transitory computer-readable medium of any of clauses 93 to 95, wherein the instruction is transmitted within location assistance data via Long Term Evolution Positioning Protocol (LPP) signaling.  
     Clause 97. The non-transitory computer-readable medium of any of clauses 93 to 96, wherein the instruction instructs the UE to: merge two or more of the plurality of consistency groups into a merged consistency group. 
     Clause 98. The non-transitory computer-readable medium of clause 97, wherein the instruction further instructs the UE to compensate one or more positioning reference signal (PRS) measurements for calibration error, wherein the one or more PRS measurements are associated with the merged consistency group based on a compensation parameter for the merged consistency group, or report the one or more compensated PRS measurements to a position estimation entity, or add a PRS compensation indicator, a PRS measurement calibration value, or both, into one or more measurement reports, or a combination thereof. 
     Clause 99. The non-transitory computer-readable medium of any of clauses 97 to 98, further comprising computer-executable instructions that, when executed by the network component, cause the network component to: receive a first measurement report based on first PRS measurements associated with the merged consistency group in association with two or more consistency group identifiers of two or more consistency groups, respectively, or receive a second measurement report based on second PRS measurements associated with the merged consistency group in association with a single consistency group identifier of the merged consistency group. 
     Clause 100. The non-transitory computer-readable medium of any of clauses 93 to 99, wherein the instruction instructs the UE to: separate one of the plurality of consistency groups into two or more new consistency groups. 
     Clause 101. The non-transitory computer-readable medium of any of clauses 93 to 100, wherein the instruction instructs the UE to modify one or more PRS resource set identifiers (IDs) associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 102. The non-transitory computer-readable medium of any of clauses 93 to 101, wherein a position estimate of the UE based on first positioning measurements from a first subset of the plurality of positioning sources is capable of estimating second positioning measurements from a second subset of the plurality of positioning sources within an error threshold, and wherein the instruction instructs the UE to modify the error threshold associated with one or more of the plurality of consistency groups or a new merged consistency group.  
     Clause 103. The non-transitory computer-readable medium of any of clauses 93 to 102, wherein the instruction instructs the UE to modify one or more uncertainty or calibration error parameters associated with one or more of the plurality of consistency groups or a new merged consistency group. 
     Clause 104. The non-transitory computer-readable medium of any of clauses 93 to 103, wherein the instruction instructs the UE to merge a first subset of two or more of the plurality of consistency groups into a first merged consistency group and to merge a second subset of two or more other of the plurality of consistency groups into a second merged consistency group. 
     Those of skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof. 
     Further, those of skill in the art will appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the aspects disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure. 
     The various illustrative logical blocks, modules, and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a  combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. 
     The methods, sequences and/or algorithms described in connection with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in random access memory (RAM), flash memory, read-only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal (e.g., UE). In the alternative, the processor and the storage medium may reside as discrete components in a user terminal. 
     In one or more exemplary aspects, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually  reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media. 
     While the foregoing disclosure shows illustrative aspects of the disclosure, it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the aspects of the disclosure described herein need not be performed in any particular order. Furthermore, although elements of the disclosure may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.