Patent Publication Number: US-2022217705-A1

Title: Ue capability information for a unified tci framework

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims benefit of and priority to U.S. Provisional Application No. 63/133,702, filed Jan. 4, 2021, which is hereby assigned to the assignee hereof and hereby expressly incorporated by reference herein in its entirety as if fully set forth below and for all applicable purposes. 
    
    
     INTRODUCTION 
     Field of the Disclosure 
     Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for providing user equipment (UE) capability information for one or more transmission configuration indicator (TCI) beam indication types. 
     Description of Related Art 
     Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few. 
     These and other multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. However, as the demand for mobile broadband access continues to increase, there exists a need for further improvements in these and emerging wireless communications technologies. 
     SUMMARY 
     Certain aspects can be implemented in a method for wireless communication by a user equipment (UE). The method generally includes sending, to the network from the UE, capability information, wherein: the capability information comprises at least one capability related to one or more transmission configuration indication (TCI) beam indication types, and at least one of the one or more TCI beam indication types comprises a multi-channel beam indication type, receiving, from the network, a configuration for the multi-channel beam indication type, wherein the configuration is based on the sent capability information, and communicating with the network based on the configured multi-channel beam indication type. 
     Certain aspects can be implemented in a method for wireless communication by a base station (BS). The method generally includes receiving capability information from the UE, wherein: the capability information comprises at least one capability related to one or more transmission configuration indication (TCI) beam indication types, and at least one of the one or more TCI beam indication types comprises a multi-channel beam indication type, transmitting, to the UE, a configuration for the multi-channel beam indication type, wherein the configuration is based on the received capability information, and communicating with the UE based on the configured multi-channel beam indication type. 
     Other aspects provide processing systems configured to perform the aforementioned methods as well as those described herein; non-transitory, computer-readable media comprising instructions that, when executed by one or more processors of a processing system, cause the processing system to perform the aforementioned methods as well as those described herein; a computer program product embodied on a computer readable storage medium comprising code for performing the aforementioned methods as well as those further described herein; and a processing system comprising means for performing the aforementioned methods as well as those further described herein. 
     The following description and the appended drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
       The appended figures depict certain features of the various aspects described herein and are not to be considered limiting of the scope of this disclosure. 
         FIG. 1  is a block diagram conceptually illustrating an example wireless communication network, in accordance with certain aspects of the present disclosure. 
         FIG. 2  is a block diagram conceptually illustrating aspects of an example a base station (BS) and user equipment (UE), in accordance with certain aspects of the present disclosure. 
         FIGS. 3A-3D  depict various example aspects of data structures for a wireless communication network. 
         FIG. 4A  is a flow diagram illustrating example operations for wireless communication by a user equipment (UE), in accordance with certain aspects of the present disclosure. 
         FIG. 4B  is a flow diagram illustrating example operations for wireless communication by a base station (BS), in accordance with certain aspects of the present disclosure. 
         FIG. 5  is an example call flow diagram illustrating example operations for wireless communication between the UE and the BS, in accordance with certain aspects of the present disclosure. 
         FIG. 6  illustrates an example wireless communications device configured to perform operations for the methods disclosed herein, in accordance with certain aspects of the present disclosure. 
         FIG. 7  illustrates an example wireless communications device configured to perform operations for the methods disclosed herein, in accordance with certain aspects of the present disclosure. 
     
    
    
     To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized on other aspects without specific recitation. 
     DETAILED DESCRIPTION 
     Aspects of the present disclosure provide systems and methods for providing user equipment (UE) capability information for one or more transmission control indication (TCI) beam indication types. In some cases, the one or more TCI beam indication types may comprise at least one multi-channel TCI state type, including a joint DL/UL common TCI state to indicate a common beam for at least one DL channel or reference signal (RS) and at least one UL channel or RS, a separate DL common TCI state to indicate a common beam for at least two DL channels or RSs, and a separate UL common TCI state to indicate a common beam for at least two UL channels or RSs. In some cases, whether a UE may be configured with a particular beam indication type may depend on a capability of the UE. Therefore, to ensure that a UE may be able to properly communicate with a base station of a network, aspects of the present disclosure provide techniques for indicating UE capability information for one or more TCI beam indication types, such as the at least one multi-channel TCI state type. 
     Brief Introduction to Wireless Communication Networks 
       FIG. 1  depicts an example of a wireless communication network  100 , in which aspects described herein may be implemented. 
     Generally, wireless communication network  100  includes base stations (BSs)  102 , user equipments (UEs)  104 , one or more core networks, such as an Evolved Packet Core (EPC)  160  and 5G Core (5GC) network  190 , which interoperate to provide wireless communications services. 
     BSs  102  may provide an access point to the EPC  160  and/or 5GC  190  for a UE  104 , and may perform one or more of the following functions: transfer of 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, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, delivery of warning messages, among other functions. Base stations may include and/or be referred to as a gNB, NodeB, eNB, ng-eNB (e.g., an eNB that has been enhanced to provide connection to both EPC  160  and 5GC  190 ), an access point, a base transceiver station, a radio base station, a radio transceiver, or a transceiver function, or a transmission reception point in various contexts. 
     A base station, such as BS  102 , may include components that are located at a single physical location or components located at various physical locations. In examples in which the base station includes components that are located at various physical locations, the various components may each perform various functions such that, collectively, the various components achieve functionality that is similar to a base station that is located at a single physical location. As such, a base station may equivalently refer to a standalone base station or a base station including components that are located at various physical locations or virtualized locations. In some implementations, a base station including components that are located at various physical locations may be referred to as or may be associated with a disaggregated radio access network (RAN) architecture, such as an Open RAN (O-RAN) or Virtualized RAN (VRAN) architecture. In some implementations, such components of a base station may include or refer to one or more of a central unit (CU), a distributed unit (DU), or a radio unit (RU). 
     BSs  102  wirelessly communicate with UEs  104  via communications links  120 . Each of BSs  102  may provide communication coverage for a respective geographic coverage area  110 , which may overlap in some cases. For example, small cell  102 ′ (e.g., a low-power base station) may have a coverage area  110 ′ that overlaps the coverage area  110  of one or more macrocells (e.g., high-power base stations). 
     The communication links  120  between BSs  102  and UEs  104  may include uplink (UL) (also referred to as reverse link) transmissions from a UE  104  to a BS  102  and/or downlink (DL) (also referred to as forward link) transmissions from a BS  102  to a UE  104 . The communication links  120  may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity in various aspects. 
     Examples of UEs  104  include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player, a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or other similar devices. Some of UEs  104  may be internet of things (IoT) devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, or other IoT devices), always on (AON) devices, or edge processing devices. UEs  104  may also be referred to more generally as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, or a client. 
     Communications using higher frequency bands may have higher path loss and a shorter range compared to lower frequency communications. Accordingly, certain base stations (e.g.,  180  in  FIG. 1 ) may utilize beamforming  182  with a UE  104  to improve path loss and range. For example, BS  180  (e.g., a gNB) and the UE  104  may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming. 
     In some cases, BS  180  may transmit a beamformed signal to UE  104  in one or more transmit directions  182 ′. UE  104  may receive the beamformed signal from the BS  180  in one or more receive directions  182 ″. UE  104  may also transmit a beamformed signal to the BS  180  in one or more transmit directions  182 ″. BS  180  may also receive the beamformed signal from UE  104  in one or more receive directions  182 ′. BS  180  and UE  104  may then perform beam training to determine the best receive and transmit directions for each of BS  180  and UE  104 . Notably, the transmit and receive directions for BS  180  may or may not be the same. Similarly, the transmit and receive directions for UE  104  may or may not be the same. 
     In some cases, BS  102  in the wireless communication network  100  may include a UE capability information component  199 , which may be configured to perform the operations depicted and described with respect to  FIGS. 4B and 5 , as well as other operations described herein for receiving UE capability information for one or more TCI beam indication types. Additionally, a UE  104  in the wireless communication network  100  may include a UE capability information component  198 , which may be configured to perform the operations depicted and described with respect to  FIGS. 4A and 5 , as well as other operations described herein for indicating UE capability information for one or more TCI beam indication types. 
       FIG. 2  depicts aspects of an example BS  102  and a UE  104 . Generally, BS  102  includes various processors (e.g.,  220 ,  230 ,  238 , and  240 ), antennas  234   a - t  (collectively  234 ), transceivers  232   a - t  (collectively  232 ), which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., data source  212 ) and wireless reception of data (e.g., data sink  239 ). For example, BS  102  may send and receive data between itself and UE  104 . 
     BS  102  includes controller/processor  240 , which may be configured to implement various functions related to wireless communications. In the depicted example, controller/processor  240  includes UE capability information component  241 , which may be representative of UE capability information component  199  of  FIG. 1 . Notably, while depicted as an aspect of controller/processor  240 , UE capability information component  241  may be implemented additionally or alternatively in various other aspects of BS  102  in other implementations. 
     Generally, UE  104  includes various processors (e.g.,  258 ,  264 ,  266 , and  280 ), antennas  252   a - r  (collectively  252 ), transceivers  254   a - r  (collectively  254 ), which include modulators and demodulators, and other aspects, which enable wireless transmission of data (e.g., data source  262 ) and wireless reception of data (e.g., data sink  260 ). 
     UE  104  includes controller/processor  280 , which may be configured to implement various functions related to wireless communications. In the depicted example, controller/processor  280  includes UE capability information component  281 , which may be representative of UE capability information component  198  of  FIG. 1 . Notably, while depicted as an aspect of controller/processor  280 , UE capability information component  281  may be implemented additionally or alternatively in various other aspects of UE  104  in other implementations. 
       FIGS. 3A, 3B, 3C, and 3D  depict aspects of data structures for a wireless communication network, such as wireless communication network  100  of  FIG. 1 . In particular,  FIG. 3A  is a diagram  300  illustrating an example of a first subframe within a 5G (e.g., 5G NR) frame structure,  FIG. 3B  is a diagram  330  illustrating an example of DL channels within a 5G subframe,  FIG. 3C  is a diagram  350  illustrating an example of a second subframe within a 5G frame structure, and  FIG. 3D  is a diagram  380  illustrating an example of UL channels within a 5G subframe. 
     Further discussions regarding  FIG. 1 ,  FIG. 2 , and  FIGS. 3A, 3B, 3C, and 3D  are provided later in this disclosure. 
     Introduction to mmWave Wireless Communications 
     In wireless communications, an electromagnetic spectrum is often subdivided into various classes, bands, channels, or other features. The subdivision is often provided based on wavelength and frequency, where frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, or a subband. 
     5G networks may utilize several frequency ranges, which in some cases are defined by a standard, such as the 3GPP standards. For example, 3GPP technical standard TS 38.101 currently defines Frequency Range  1  (FR 1 ) as including 600 MHz-6 GHz, though specific uplink and downlink allocations may fall outside of this general range. Thus, FR 1  is often referred to (interchangeably) as a “Sub-6 GHz” band. 
     Similarly, TS 38.101 currently defines Frequency Range  2  (FR 2 ) as including 26-41 GHz, though again specific uplink and downlink allocations may fall outside of this general range. FR 2 , is sometimes referred to (interchangeably) as a “millimeter wave” (“mmW” or “mmWave”) band, despite being different from the extremely high frequency (EHF) band (30 GHz-300 GHz) that is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band because wavelengths at these frequencies are between 1 millimeter and 10 millimeters. 
     Communications using mmWave/near mmWave radio frequency band (e.g., 3 GHz-300 GHz) may have higher path loss and a shorter range compared to lower frequency communications. As described above with respect to  FIG. 1 , a base station (e.g.,  180 ) configured to communicate using mmWave/near mmWave radio frequency bands may utilize beamforming (e.g.,  182 ) with a UE (e.g.,  104 ) to improve path loss and range. 
     Example UE Capability Information for a Unified TCI Framework 
     In certain networks, such as fifth generation (5G) New Radio (NR) network, a user equipment (UE) may communicate with the network via one or more cells (e.g., one or more serving cells) and using one or more component carriers (or carrier bandwidths). In 5G, each component carrier may be defined by one or more bandwidth parts (BWPs). In some cases, a bandwidth part may be considered as a contiguous set of physical resource blocks, selected from a contiguous subset of the common resource blocks for a given numerology on a given carrier. In some cases, the UE may be configured with a maximum of four BWPs in the downlink (DL) and uplink (UL) for a given carrier. 
     Additionally, in certain cases, only one BWP for the given carrier may be active at any given time. For example, assuming that the UE is configured with four BWPs (BWP 0 , BWP 1 , BWP 2 , and BWP 3 ), only one of the four BWPs may be active at a given time while the other BWPs remain inactive. However, while only one BWP may be active at a time, the active BWP may be switched to a different BWP. For example, assuming BWP 1  is the active BWP, the active BWP may be switched to BWP 2  or BWP 3  based on certain criteria. 
     In some cases, the UE may be configured with a set of beam indication sets for communicating in one or more BWPs. For uplink transmission, the beam indication sets may be spatial relations. For downlink transmission, the beam indication sets may be transmission configuration indication (TCI) states. The set of beam indications may be configured for a particular channel or type of transmission. The UE may be configured with the beam indication sets by higher layer signaling, such as radio resource control (RRC) signaling. In some examples, a subset of the configured sets may be activated via a medium access control element (MAC-CE). In some examples, an indication in downlink control information (DCI) may indicate (e.g., via a 3-bit indicator) one of the beam indications for the transmission scheduled by the DCI. The indicated TCI state or spatial relation may indicate to the UE the receive beam or transmit beam to use, respectively. 
     Different TCI beam indication types (or TCI state types) may exist and each TCI beam indication type may include one or more TCI states. For example, in some cases, the TCI beam indication types may include several single-channel beam indication types, such as (1) a separate DL single channel/RS TCI state to indicate a beam for a single DL channel/RS, (2) a separate UL single channel/RS TCI state to indicate a beam for a single UL channel/RS, and (3) UL spatial relation info to indicate a beam for a single UL channel/RS. Additionally, in some cases, the TCI beam indication types may include three additional multi-channel beam indication types, including (4) a joint DL/UL common TCI state to indicate a common beam for at least one DL channel/RS and at least one UL channel/RS, (5) a separate DL common TCI state to indicate a common beam for at least two DL channels/RSs, and (6) a separate UL common TCI state to indicate a common beam for at least two UL channels/RSs. Generally, these beam indication types/TCI states may be updated by downlink control information (DCI). When updated, an application time associated with the updated beam indication type/TCI state may be determined from the completion of receiving the DCI or from the completion of transmitting an acknowledgement indicating the DCI was received. 
     In some cases, whether a UE may be configured with a particular beam indication type/TCI state may depend on a capability of the UE. Thus, aspects of the present disclosure provide techniques for indicating UE capabilities related to the single-channel and multi-channel beam indication types/TCI states discussed above. For example, in some cases, such techniques may involve providing, to a network, capability information, the capability information including at least one capability related to one or more TCI beam indication types and the at least one of the one or more TCI beam indication types comprising a multi-channel beam indication type. 
     Example Operations for Indicating UE Capability Information for TCI Beam Indication Types 
       FIG. 4A  is a flow diagram illustrating example operations  400 A for wireless communication, in accordance with certain aspects of the present disclosure. The operations  400  may be performed, for example, by a UE (e.g., such as the UE  104  in the wireless communication network  100  of  FIG. 1 ) for indicating UE capability information for one or more TCI beam indication types. The operations  400 A may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor  280  of  FIG. 2 ). Further, the transmission and reception of signals by the UE in operations  400 A may be enabled, for example, by one or more antennas (e.g., antennas  252  of  FIG. 2 ). In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor  280 ) obtaining and/or outputting signals. 
     The operations  400 A begin, at  402 A, by sending capability information to the network. In some cases, the capability information comprises at least one capability related to one or more TCI beam indication types and at least one of the one or more TCI beam indication types comprises a multi-channel beam indication type. In some cases, the UE may provide the capability information to the network based on a UE capability enquiry received from the network. 
     At block  404 A, the UE receives, from the network, a configuration for the multi-channel beam indication type, wherein the configuration is based on the sent capability information; and 
     At block  406 A, the UE communicates with the network based on the configured multi-channel beam indication type 
       FIG. 4B  is a flow diagram illustrating example operations  400 B for wireless communication, in accordance with certain aspects of the present disclosure. The operations  400 B may be performed, for example, by a BS (e.g., such as the BS  102  in the wireless communication network  100  of  FIG. 1 ) for receiving UE capability information for one or more TCI beam indication types. The operations  400 B may be complementary to the operations  400 A performed by the UE. The operations  400 B may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor  240  of  FIG. 2 ). Further, the transmission and reception of signals by the BS in operations  400 B may be enabled, for example, by one or more antennas (e.g., antennas  234  of  FIG. 2 ). In certain aspects, the transmission and/or reception of signals by the BS may be implemented via a bus interface of one or more processors (e.g., controller/processor  240 ) obtaining and/or outputting signals. 
     The operations  400 B begin, at  402 B, by receiving capability information from a UE. In some cases, the capability information comprises at least one capability related to one or more transmission configuration indication (TCI) beam indication types and at least one of the one or more TCI beam indication types comprises a multi-channel beam indication type. In some cases, the BS may receive the capability information from the UE based on a UE capability information enquiry transmitted by the BS to the UE. 
     At block  404 B, the BS transmits, to the UE, a configuration for the multi-channel beam indication type, wherein the configuration is based on the received capability information. 
     At block  406 B, the BS communicates with the UE based on the configured multi-channel beam indication type. 
     Example Call Flow Illustrating Example Operations between a Base Station and User Equipment for Indicating UE Capability Information for TCI Beam Indication Types 
       FIG. 5  is an example call flow diagram illustrating operations  500  performed by a UE (e.g., such as the UE  104  illustrated in  FIGS. 1 and 2 ) and a BS (e.g., such as the BS  102  illustrated in  FIGS. 1 and 2 ) for indicating UE capability information for TCI beam indication types. 
     For example, as shown, at block  502 , the UE  104  may send capability information to the BS  102 . In some cases, the capability information comprises at least one capability related to a multi-channel beam indication type. 
     At block  504 , the BS  102  may transmit a configuration to the UE  104  for the multi-channel beam indication type. In some cases, the configuration may be based on the capability information sent at  502 . 
     Thereafter, as shown at block  506 , the UE  104  and the BS  102  may communicate with each other based on the configured multi-channel beam indication type. 
     Additional Details for Indicating UE Capability Information for TCI Beam Indication Types 
     As noted above, aspects of the present disclosure provide techniques for providing UE capability information for one or more TCI beam indication types (e.g., TCI state). In some cases, the UE capability information may relate to the UE&#39;s capability to support at least one of the one or more TCI beam indication types. For example, as will be explained in greater detail below, the capability information may indicate an individual capability of whether the UE supports each type of beam indication (e.g., beam indication types  1  through  6 , as described above). In some cases, the capability information comprises at least one capability related to one or more TCI beam indication types including a multi-channel beam indication type. In some cases, the multi-channel beam indication type may indicate a common TCI state for at least one downlink channel and at least one uplink channel, a common TCI state for at least two downlink channels, and/or a common TCI state for at least two uplink channels. 
     Additionally, in some cases, the at least one capability may include an indication of whether a source reference signal (RS) may be from a non-serving cell on an individual TCI beam indication type basis or a group basis. For example, in some cases, the at least one capability included in the capability information may include, for each respective TCI beam indication type of the one or more TCI beam indication types, an indication of whether a source RS for the respective TCI beam indication type can be from a non-serving cell. In other cases, the at least one capability may indicate whether a source RS can be from a non-serving cell for all TCI beam indication types (e.g., as a group). In other words, in some cases, the at least one capability may comprise an indication of whether a source RS for the one or more TCI beam indication types (e.g., as a group) can be from a non-serving cell. 
     Additionally, in some cases, the at least one capability included in the capability information may indicate one or more supported target signals for each respective TCI beam indication type of the one or more TCI beam indication types. A target signal may refer to a signal for which channel properties may be inferred by measuring those channel properties for an associated source signal. As noted above, a UE may use the source RS to determine various channel properties, depending on the associated QCL type, and use those various channel properties (determined based on the source RS) to process the target signal. Examples of source RSs include phase tracking reference signals (PTRSs), synchronization signal blocks (SSBs), sounding reference signal (SRS), and/or CSI-RSs (e.g., CSI-RS for beam management). 
     In some cases, the target signal may comprise a target channel, including at least one of UE-specific or non-UE specific physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), physical uplink control channel (PUCCH), and/or physical uplink shared channel (PUSCH). In some cases, the PDSCH/PUCCH/PUSCH target channels may be dynamically scheduled by DCI, semi-statically activated by DCI/MAC-CE, or semi-statically configured by radio resource control (RRC) signaling. Further, in some cases, the PDSCH target channel may include a case where a scheduling offset between DCI and the PDSCH is equal to or greater than a beam switch latency threshold and/or a case where the scheduling offset is less than the threshold. Additionally, in some cases, it may be assumed that the PDCCH target channel may be carried by all or a subset of control resource sets (CORESETs). 
     Additionally, in some cases, the target signal may comprise a target RS, including a synchronization signal block (SSB), periodic, semi-periodic, or aperiodic (P/SP/AP) channel state reference signals (CSI-RSs), and/or P/SP/AP positioning reference signals (PRS). In some cases, the purpose of the CSI-RSs may be for CSI measurement/reporting without the higher layer parameter tracking reference signal (TRS)-Info and repetition, beam measurement or reporting with the higher layer parameter repetition, and TRS measurement with the higher layer parameter trs-Info. In some cases, the higher layer parameter trs-Info defines a time frequency resource allocation pattern for a tracking reference signal, which may be a special kind of CSI-RS. 
     Further, in some cases, the target signal may include P/SP/AP sounding reference signals (SRSs). In some cases, the purpose of the SRSs may be for antenna switching, beam management, codebook based PUSCH, and non-codebook based PUSCH. Additionally, it should be noted that the PUCCH, SSB, CSI-RS, PRS, and/or SRS may be all or a subset of corresponding configured resources associated with the UE. 
     Capability Regarding Activated TCI Beam Indication Types 
     According to aspects, in some cases, the at least one capability of the capability information sent at  402 A in  FIG. 4A  comprises one or more capabilities related to a number of activated TCI beam indication types that the UE supports (e.g., TCI states/spatial relation information). For example, in some cases, the at least one capability may comprise a first capability related to the number of activated TCI states per beam indication type that the UE supports. In some cases, the first capability may indicate, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of activated TCI states per time-frequency resource (e.g., per BWP per CC). As used herein, the time-frequency resource may include a bandwidth part (BWP), component carrier (CC), or a CORESET pool index. 
     Additionally, in some cases, the at least one capability of the capability information sent at  402 A in  FIG. 4A  comprises a second capability related to the number of activated TCI beam indication types that the UE supports. For example, in some cases, the second capability may indicate, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of activated TCI states per time-frequency resource (e.g., per BWP per CC) for the multiple TCI beam indication types. In some cases, the multiple TCI beam indication types may include all of the TCI beam indication types (e.g., as described above) or a subset of the TCI beam indication types. For example, in some cases, the at least one capability may indicate a maximum number of total activated DL related beam indications, such as for TCI beam indication types  1 ,  4  and  5  described above. In some cases, the at least one capability may indicate a maximum number of total UL related beam indications, such as for TCI beam indication types  2 ,  3 ,  4 , and  6 . In some cases, the at least one capability may indicate a maximum number of total common related beam indications, such as for TCI beam indication types  4 ,  5 , and  6 . 
     Additionally, in some cases, the at least one capability of the capability information sent at  402 A in  FIG. 4A  comprises a third capability related to the number of activated TCI beam indication types that the UE supports. For example, in some cases, the third capability may be similar to the first capability and second capability except that is the third capability is reported per CORESETPoolIndex per BWP per CC for multi-DCI (mDCI) based on multiple TRPs (mTRP). In other words, the time-frequency resource for the third capability may comprise a CORESET pool index. Accordingly, in some cases, the third capability may comprise, for example, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of activated TCI states per CORESET pool index per BWP per CC (e.g., in case of mDCI based mTRP). Additionally, in some cases, the third capability may comprise, for the multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of activated TCI states per CORESET pool index per BWP per CC (e.g., in case of mDCI based mTRP). 
     Additionally, in some cases, the maximum number of activated TCI states may apply across all time-frequency resources of a same type. For example, in such cases, the at least one capability of the capability information sent at  402 A in  FIG. 4A  may comprise a fourth capability related to the number of TCI beam indication types. In some cases, the fourth capability may be similar to the first and second capabilities except that with the fourth capability is reported across all CORESET pool indices per BWP per CC. Accordingly, in some cases, the fourth capability may comprise, for example, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of activated TCI states across all CORESET pool indices per BWP per CC (e.g., in case of mDCI based mTRP). Additionally, in some cases, the fourth capability may comprise, for the multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of activated TCI states across all CORESET pool indies per BWP per CC (e.g., in case of mDCI based mTRP). 
     In some cases, the at least one capability of the capability information sent at  402 A in  FIG. 4A  may comprise a fifth capability related to the number of TCI beam indication types. According to aspects, the fifth capability may include the first, second, third, and fourth capabilities except that the fifth capability is reported across all BWPs on all CCs, for example, in the case of carrier aggregation (CA). Accordingly, in some cases, the fifth capability may comprise, for example, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of activated TCI states across all BWPs on all CCs (e.g., similar to the first capability). Additionally, in some cases, the fifth capability may comprise, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of activated TCI states across all BWPs on all CCs (e.g., similar to the second capability). 
     Additionally, in some cases, the fifth capability may comprise, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of activated TCI states per CORESET pool index across all BWPs on all CC (e.g., similar to the third capability). Additionally, in some cases, the fifth capability may comprise, for the multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of activated TCI states per CORESET pool index across all BWPs on all CCs (e.g., similar to the third capability). 
     Additionally, in some cases, the fifth capability may comprise, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of activated TCI states across all CORESET pool indices across all BWPs one all CCs (e.g., similar to the fourth capability). Additionally, in some cases, the fifth capability may comprise, for the multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of activated TCI states across all CORESET pool indies across all BWPs on all CCs (e.g., similar to the fourth capability). 
     In some cases, the maximum number of activated TCI states per time-frequency resource may be based on whether the time-frequency resource is from a non-serving cell. Accordingly, in some cases, the at least one capability of the capability information sent at  402 A in  FIG. 4A  may comprise a sixth capability related to the number of TCI beam indication types, which may be based on whether the time-frequency resource is from a non-serving cell or a serving cell. For example, in some cases, the sixth capability may include the first, second, third, fourth, and fifth capabilities except that the sixth capability splits each of the first, second, third, fourth, and fifth capabilities into two different capabilities containing beam indication RSs from serving cells and non-serving cells. In some cases, a non-serving beam indication RS may be an SSB or may be directly or indirectly quasi-colocated with an SSB from a non-serving cell. 
     In some cases, a zero value in the at least one capability of the capability information sent at  402 A in  FIG. 4A  for any respective TCI beam indication type of the one or more TCI beam indication types may indicate the user equipment does not support the respective TCI beam indication type. 
     Capability Regarding Configured TCI Beam Indication Types 
     According to aspects, in some cases, the at least one capability of the capability information sent at  402 A in  FIG. 4A  comprises one or more capabilities related to a number of configured TCI beam indication types that the UE supports (e.g., TCI states/spatial relation information). For example, in some cases, the at least one capability comprises a seventh capability related to the number of configured TCI beam indication types that the UE supports. The seventh capability may include, for example, a maximum number of configured beam indications per TCI beam indication type across all BWPs per CC. Accordingly, in some cases, the seventh capability may indicate, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of configured TCI states per time-frequency resource. As noted above, in some cases, the time-frequency resource may include at least one of a BWP, a CC, or a CORESET pool index. Accordingly, in some cases, the seventh capability may indicate, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of configured TCI states across all BWPs per CC. 
     In some cases, the at least one capability comprises an eighth capability related to a number of configured TCI beam indication types that the UE supports. For example, in some cases, the eighth capability may indicate, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of total configured beam indications across multiple beam indication types across all BWPs per CC. More generally, for example, the eighth capability may indicate, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of configured TCI states per time-frequency resource for the multiple of TCI beam indication types. Here, the time-frequency resource may comprise all BWPs per CC. In some cases, the multiple TCI beam indication types may include all of the TCI beam indication types (e.g., types  1 - 6  as described above) ora subset of the TCI beam indication types. As noted above, in some cases, the subset of TCI beam indication types may comprise downlink-related TCI beam indication types, uplink-related TCI beam indication types, and/or common beam TCI beam indication types. 
     In some cases, the maximum number of configured TCI states may apply across all time-frequency resources of a same type. For example, in such cases the at least one capability comprises a ninth capability related to a number of configured TCI beam indication types that the UE supports. According to aspects, the ninth capability related to a number of configured TCI beam indication types may include the first and second capabilities except with the ninth capability is reported for all BWPs on all CCs, for example, in the case of carrier aggregation. For example, in some cases, the ninth capability may indicate, for each respective TCI beam indication type of the one or more TCI beam indication types, a maximum number of configured TCI states across all BWPs on all CCs. Additionally, in some cases, the ninth capability may indicate, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of total configured beam indications across multiple beam indication types across all BWPs on all CCs. 
     As noted above, in some cases, a zero value in the at least one capability of the capability information sent at  402 A in  FIG. 4A  for any respective TCI beam indication type of the one or more TCI beam indication types may indicate the user equipment does not support the respective TCI beam indication type. 
     In some cases, the UE may report the following capabilities regarding support of layer one (L1) based beam update for various types of beam indications. For example, in some cases, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of whether the user equipment supports DCI-based beam update for the respective TCI beam indication type. 
     In some cases, for a set of multiple TCI beam indication types of the one or more TCI beam indication types, the at least one capability comprises an indication of whether the user equipment supports DCI-based beam updates for the subset of TCI beam indication types. In some cases, the set of multiple TCI beam indication types may comprise all of the TCI beam indication types or a subset of the TCI beam indication types described above (e.g., TCI beam indication types  1 - 6 ). 
     In some cases, the at least one capability comprises one or more DCI formats supported by the user equipment for DCI-based beam updates. In some cases, the at least one capability may indicate a support of a beam indication via individual or all existing DL DCI formats, including, for example, DCI formats  1 _ 0 ,  1 _ 1 ,  1 _ 2 . In some cases, the at least one capability may indicate support of beam indication via individual or all existing UL DCI formats, including, for example, DCI formats  0 _ 0 ,  0 _ 1 ,  0 _ 2 . In some cases, the at least one capability may indicate support of beam indication via a new DCI format. 
     Capability Regarding Support of Common TCI State ID Update and Activation 
     In some cases, the UE may report a capability regarding support of a common TCI state ID update and activation to provide common QCL information and/or common UL TX spatial filter(s) across a set of configured CCs in case of CA. For example, in some cases, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability may comprise an indication of support for common TCI state update for one or more time-frequency resources. As noted above, in some cases, the time-frequency resource is one of a bandwidth part, a CC, or a CORESET pool index. Accordingly, for example, in some cases, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability may comprise an indication of support for common TCI state update and activation across multiple CCs per TCI beam indication type. 
     In some cases, for multiple TCI beam indication types of the one or more TCI beam indication types, the at least one capability comprises an indication of support for common TCI state update for one or more time-frequency resources for the multiple TCI beam indication types. In some cases, the multiple TCI beam indication types may comprise all of the TCI beam indication types or a subset of the TCI beam indication types described above (e.g., TCI beam indication types  1 - 6 ). In some cases, the subset of TCI beam indication types may comprise downlink-related TCI beam indication types, uplink-related TCI beam indication types, and/or common beam TCI beam indication types. 
     In some cases, the at least one capability may indicate support of a common TCI state ID update and activation across multiple CCs for intra-band CA, for inter-band CA, for CCs per band, for CCs per band combination, and/or per UE. For example, in some cases, the one or more time-frequency resources noted above may include one of a bandwidth part, a CC, or a CORESET pool index. In some cases, the one or more time-frequency resources noted above may include a plurality of time-frequency resources for intra-band carrier aggregation. In some cases, the one or more time-frequency resources noted above may include a plurality of time-frequency resources for inter-band carrier aggregation. In some cases, the one or more time-frequency resources noted above may include a plurality of time-frequency resources for a band. In some cases, the one or more time-frequency resources noted above may include a plurality of time-frequency resources associated with the user equipment. 
     In some cases, the at least one capability may indicate support of a common TCI state pool shared across multiple CCs instead of individual TCI state pool per CC. Accordingly, for example, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability may comprise an indication of support for common TCI state pool for one or more time-frequency resources. In some cases, the common TCI state pool can be configured per beam indication type or shared by different beam indication types, which may occupy different subsets of TCI state IDs in the common pool. 
     In some cases, the UE may report a capability related to non-serving cell RS, which can be used as beam indication source RS in various beam indication types. In some cases, a non-serving cell RS may be an RS that is an SSB of a non-serving cell or has an SSB of a non-serving cell as direct or indirect QCL source. Accordingly, in some cases, the UE may indicate support of measurement and reporting of non-serving cell RS per beam indication type. For example, in some cases, for each respective TCI beam indication type of the one or more TCI beam indication types, that at least one capability may comprise an indication of whether the user equipment supports measurement and reporting of non-serving cell reference symbols for the respective TCI beam indication type. 
     In some cases, the UE may indicate support of measurement and reporting of non-serving cell RS for multiple beam indication types. For example, in some cases, for multiple TCI beam indication types of the one or more TCI beam indication types, the at least one capability comprises an indication of whether the user equipment supports measurement and reporting of non-serving cell reference symbols for the multiple TCI beam indication types. In some cases, the multiple TCI beam indication types may comprise all of the TCI beam indication types or a subset of the TCI beam indication types described above (e.g., TCI beam indication types  1 - 6 ). In some cases, the subset of TCI beam indication types may comprise downlink-related TCI beam indication types, uplink-related TCI beam indication types, and/or common beam TCI beam indication types. 
     Additional Aspects Regarding UE Capability for Unified TCI States 
     In the unified TCI state framework described above, a UE (e.g., UE  104 ) may be indicated a DL or joint TCI state (via DCI or MAC-CE) by a BS (e.g., BS  102 ) for UE-dedicated PDSCH and PDCCH. The UE-dedicated PDSCH and PDCCH will share the indicated TCI state. In some cases, the BS can optionally configure all other downlink (DL) channels and RSs to share the same TCI state as the PDCCH/PDSCH. Similarly, in an uplink (UL) direction, the UE may be indicated a UL or joint TCI state for UE-dedicated PUCCH+dynamic grant (DG) as well as for configured grant (CG) PUSCH. 
     In such cases, additional UE capabilities may be reported, for example, via radio resource control (RRC) signaling. In some cases, these capabilities may even be reported via RRC in a legacy release (e.g., Release 15 and/or Release 16). For downlink, the UE may generate and send a capability report to the BS to indicate which DL channels and/or RSs can share the same unified TCI as UE-dedicated PDCCH/PDSCH. The DL channels and/or RSs that UE may report at least include: non-UE-dedicated PDCCH/PDSCH, aperiodic (AP) CSI-RS for CSI and beam management. In such cases, the BS may only configure (e.g., via RRC signaling) the DL channel and/or RSs that the UE supports to share the same TCI state as UE-dedicated PDSCH and PDCCH. If a DL channel and/or RS is supported and configured to share the same TCI as the UE-dedicated PDSCH/PDCCH, the TCI state of the DL channel and/or RS is also updated when a new TCI state is indicated for the UE-dedicated PDSCH/PDCCH. 
     Similarly, for uplink, the UE may report within the UE capability report which UL channels and/or RSs can share the same unified TCI state as dynamic-grant/configured-grant based PUSCH and dedicated PUCCH. In such cases, the UL channel and/or RSs may include AP SRS for beam management, non-codebook based transmission, codebook based transmission, and antenna switching. 
     Example Wireless Communication Devices 
       FIG. 6  depicts an example communications device  600  that includes various components operable, configured, or adapted to perform operations for the techniques disclosed herein, such as the operations depicted and described with respect to  FIGS. 4A and 5 . In some examples, communications device  600  may be a UE  104  as described, for example with respect to  FIGS. 1 and 2 . 
     Communications device  600  includes a processing system  602  coupled to a transceiver  608  (e.g., a transmitter and/or a receiver). Transceiver  608  is configured to transmit (or send) and receive signals for the communications device  600  via an antenna  610 , such as the various signals as described herein. Processing system  602  may be configured to perform processing functions for communications device  600 , including processing signals received and/or to be transmitted by communications device  600 . 
     Processing system  602  includes one or more processors  620  coupled to a computer-readable medium/memory  630  via a bus  606 . In certain aspects, computer-readable medium/memory  630  is configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors  620 , cause the one or more processors  620  to perform the operations illustrated in  FIGS. 4A and 5 , or other operations for performing the various techniques discussed herein for indicating UE capability information for one or more TCI beam indication types. 
     In the depicted example, computer-readable medium/memory  630  stores code  631  for receiving, code  632  for sending, and code  633  for communicating. 
     In the depicted example, the one or more processors  620  include circuitry configured to implement the code stored in the computer-readable medium/memory  630 , including circuitry  621  for receiving, circuitry  622  for sending, and circuitry  623  for communicating. 
     Various components of communications device  600  may provide means for performing the methods described herein, including with respect to  FIGS. 4A and 5 . 
     In some examples, means for transmitting or sending (or means for outputting for transmission) and/or means for communicating may include the transceivers  254  and/or antenna(s)  252  of the UE  104  illustrated in  FIG. 2  and/or transceiver  608  and antenna  610  of the communications device  600  in  FIG. 6 . 
     In some examples, means for receiving (or means for obtaining) may include the transceivers  254  and/or antenna(s)  252  of the UE  104  illustrated in  FIG. 2  and/or transceiver  608  and antenna  610  of the communications device  600  in  FIG. 6 . 
     In some cases, rather than actually transmitting, for example, signals and/or data, a device may have an interface to output signals and/or data for transmission (a means for outputting). For example, a processor may output signals and/or data, via a bus interface, to a radio frequency (RF) front end for transmission. Similarly, rather than actually receiving signals and/or data, a device may have an interface to obtain the signals and/or data received from another device (a means for obtaining). For example, a processor may obtain (or receive) the signals and/or data, via a bus interface, from an RF front end for reception. In various aspects, an RF front end may include various components, including transmit and receive processors, transmit and receive MIMO processors, modulators, demodulators, and the like, such as depicted in the examples in  FIG. 2 . 
     In some examples, means for determining, means for configuring, means for updating, and means for starting may include various processing system components, such as: the one or more processors  620  in  FIG. 6 , or aspects of the UE  104  depicted in  FIG. 2 , including receive processor  258 , transmit processor  264 , TX MIMO processor  266 , and/or controller/processor  280  (including UE capability information component  281 ). 
     Notably,  FIG. 6  is an example, and many other examples and configurations of communications device  600  are possible. 
       FIG. 7  depicts an example communications device  700  that includes various components operable, configured, or adapted to perform operations for the techniques disclosed herein, such as the operations depicted and described with respect to  FIGS. 4B and 5 . In some examples, communications device  700  may be a BS  102  as described, for example with respect to  FIGS. 1 and 2 . 
     Communications device  700  includes a processing system  702  coupled to a transceiver  708  (e.g., a transmitter and/or a receiver). Transceiver  708  is configured to transmit (or send) and receive signals for the communications device  700  via an antenna  710 , such as the various signals as described herein. Processing system  702  may be configured to perform processing functions for communications device  700 , including processing signals received and/or to be transmitted by communications device  700 . 
     Processing system  702  includes one or more processors  720  coupled to a computer-readable medium/memory  730  via a bus  706 . In certain aspects, computer-readable medium/memory  730  is configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors  720 , cause the one or more processors  720  to perform the operations illustrated in  FIGS. 4B and 5 , or other operations for performing the various techniques discussed herein for receiving UE capability information for one or more TCI beam indication types. 
     In the depicted example, computer-readable medium/memory  730  stores code  731  for transmitting, code  732  for receiving, and code  733  for communicating. 
     In the depicted example, the one or more processors  720  include circuitry configured to implement the code stored in the computer-readable medium/memory  730 , including circuitry  721  for transmitting, circuitry  722  for receiving, and circuitry  723  for communicating. 
     Various components of communications device  700  may provide means for performing the methods described herein, including with respect to  FIGS. 4B and 5 . 
     In some examples, means for transmitting or sending (or means for outputting for transmission) may include the transceivers  232  and/or antenna(s)  234  of the BS  102  illustrated in  FIG. 2  and/or transceiver  708  and antenna  710  of the communications device  700  in  FIG. 7 . 
     In some examples, means for receiving (or means for obtaining) may include the transceivers  232  and/or antenna(s)  234  of the base station illustrated in  FIG. 2  and/or transceiver  708  and antenna  710  of the communications device  700  in  FIG. 7 . 
     In some examples, means for determining, means for configuring, means for updating, and means for starting may include various processing system components, such as: the one or more processors  720  in  FIG. 7 , or aspects of the BS  102  depicted in  FIG. 2 , including receive processor  238 , transmit processor  220 , TX MIMO processor  230 , and/or controller/processor  240  (including UE capability information component  241 ). 
     Notably,  FIG. 7  is an example, and many other examples and configurations of communications device  700  are possible. 
     Example Clauses 
     Implementation examples are described in the following numbered clauses: 
     Clause 1: A method for wireless communications, comprising: sending, to a network from a user equipment (UE), capability information, wherein: the capability information comprises at least one capability related to one or more transmission configuration indication (TCI) beam indication types, and at least one of the one or more TCI beam indication types comprises a multi-channel beam indication type; receiving, from the network, a configuration for the multi-channel beam indication type, wherein the configuration is based on the sent capability information; and communicating with the network based on the configured multi-channel beam indication type. 
     Clause 2: The method of Clause 1, wherein the multi-channel beam indication type indicates a common TCI state for at least one downlink channel and at least one uplink channel. 
     Clause 3: The method of Clause 1, wherein the multi-channel beam indication type indicates a common TCI state for at least two downlink channels. 
     Clause 4: The method of Clause 1, wherein the multi-channel beam indication type indicates a common TCI state for at least two uplink channels. 
     Clause 5: The method of any one of Clauses 1-4, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of whether a reference signal for the respective TCI beam indication type can be from a non-serving cell. 
     Clause 6: The method of any one of Clauses 1-4, wherein the at least one capability comprises an indication of whether a reference signal for the one or more TCI beam indication types can be from a non-serving cell. 
     Clause 7: The method of any one of Clauses 1-6, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of a target signal for the respective TCI beam indication type. 
     Clause 8: The method of Clause 7, wherein the target signal comprises a target channel including one of a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), or a physical uplink shared channel (PUSCH). 
     Clause 9: The method of Clause 8, wherein the target channel is dynamically scheduled via downlink control information (DCI) from the network. 
     Clause 10: The method of Clause 8, wherein the target channel is semi-statically activated by a medium access control control element (MAC-CE). 
     Clause 11: The method of Clause 8, wherein the target channel is semi-statically activated by a radio resource control signaling. 
     Clause 12: The method of any one of Clauses 7-11, wherein the target signal comprises one of a synchronization signal block (SSB), channel state information reference signal (CSI-RS), or positioning reference signal (PRS). 
     Clause 13: The method of Clause 7, wherein the target signal comprises a sounding reference signal (SRS) 
     Clause 14: The method of any one of Clauses 1-13, wherein the, for each respective TCI beam indication type of the one or more TCI beam indication type, the at least one capability comprises a maximum number of activated TCI states per time-frequency resource. 
     Clause 15: The method of any one of Clauses 1-13, wherein the at least one capability comprises, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of activated TCI states per time-frequency resource for the multiple TCI beam indication types. 
     Clause 16: The method of Clause 15, wherein the multiple TCI beam indication types comprise downlink-related TCI beam indication types. 
     Clause 17: The method of Clause 15, wherein the multiple TCI beam indication types comprise uplink-related TCI beam indication types. 
     Clause 18: The method of Clause 15, wherein the multiple TCI beam indication types comprises common beam TCI beam indication types. 
     Clause 19: The method of any one of Clauses 14-18, wherein the time-frequency resource is one of a bandwidth part, a component carrier, or a control resource set (CORESET) pool index. 
     Clause 20: The method of Clause 19, wherein the maximum number of activated TCI states applies across all time-frequency resources of a same type. 
     Clause 21: The method of any one of Clauses 14-20, wherein the maximum number of activated TCI states per time-frequency resource is based on whether the time-frequency resource is from a non-serving cell. 
     Clause 22: The method of any one of Clauses 14-21, wherein a zero value in the capability information for any respective TCI beam indication type of the one or more TCI beam indication types indicates the UE does not support the respective TCI beam indication type. 
     Clause 23: The method of any one of Clauses 1-22, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises a maximum number of configured TCI states per time-frequency resource. 
     Clause 24: The method of any one of Clauses 1-22, wherein the capability information further comprises, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of configured TCI states per time-frequency resource for the multiple of TCI beam indication types. 
     Clause 25: The method of Clause 24, wherein the multiple TCI beam indication types comprises downlink-related TCI beam indication types. 
     Clause 26: The method of Clause 24, wherein the multiple TCI beam indication types comprises uplink-related TCI beam indication types. 
     Clause 27: The method of Clause 24, wherein the subset of multiple TCI beam indication types comprises common beam TCI beam indication types. 
     Clause 28: The method of any one of Clauses 23-27, wherein the time-frequency resource is one of a bandwidth part, a component carrier, or a control resource set (CORESET) pool index. 
     Clause 29: The method of any one of Clauses 23-28, wherein the maximum number of configured TCI states applies across all time-frequency resources of a same type. 
     Clause 30: The method of any one of any one of Clauses 23-29, wherein a zero value in the capability information for any respective TCI beam indication type of the one or more TCI beam indication types indicates the user equipment does not support the respective TCI beam indication type. 
     Clause 31: The method of any one of Clauses 1-30, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprise an indication of whether the UE supports DCI-based beam update for the respective TCI beam indication type. 
     Clause 32: The method of any one of Clauses 1-30, wherein, for a set of multiple TCI beam indication types of the one or more TCI beam indication types, the at least one capability comprises an indication of whether the UE supports DCI-based beam update for the set of multiple TCI beam indication types. 
     Clause 33: The method of any one of Clauses 31-32, wherein the at least one capability comprises one or more DCI formats supported by the UE for DCI-based beam updates. 
     Clause 34: The method of any one of Clauses 1-33, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of support for common TCI state update for one or more time-frequency resources. 
     Clause 35: The method of any one of Clauses 1-33, wherein, for a subset of TCI beam indication types of the one or more TCI beam indication types, the at least one capability comprises an indication of support for common TCI state update for one or more time-frequency resources for the subset of TCI beam indication types. 
     Clause 36: The method of Clause 35, wherein the subset of TCI beam indication types comprises downlink-related TCI beam indication types. 
     Clause 37: The method of Clause 35, wherein the subset of TCI beam indication types comprises uplink-related TCI beam indication types. 
     Clause 38: The method of Clause 35, wherein the subset of TCI beam indication types comprises common beam TCI beam indication types. 
     Clause 39: The method of any one of Clauses 34-38, wherein the time-frequency resource is one of a bandwidth part, a component carrier, or a control resource set (CORESET) pool index. 
     Clause 40: The method of any one of Clauses 34-39, wherein the one or more time-frequency resources comprise a plurality of time-frequency resources for intra-band carrier aggregation. 
     Clause 41: The method of any one of Clauses 34-39, wherein the one or more time-frequency resources comprise a plurality of time-frequency resources for inter-band carrier aggregation. 
     Clause 42: The method of any one of Clauses 34-39, wherein the one or more time-frequency resources comprise a plurality of time-frequency resources for a band. 
     Clause 43: The method of any one of Clauses 34-39, wherein the one or more time-frequency resources comprise a plurality of time-frequency resources associated with the user equipment. 
     Clause 44: The method of any one of Clauses 1-43, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of support for common TCI state pool for one or more time-frequency resources. 
     Clause 45: The method of any one of Clauses 1-44, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, an indication of whether the UE supports measurement and reporting of non-serving cell reference signals for the respective TCI beam indication type. 
     Clause 46: The method of any one of Clause 1-44, wherein, for multiple TCI beam indication types of the one or more TCI beam indication types, an indication of whether the UE supports measurement and reporting of non-serving cell reference signals for the multiple TCI beam indication types. 
     Clause 47: The method of Clause 46, wherein the multiple TCI beam indication types comprise downlink-related TCI beam indication types. 
     Clause 48: The method of Clause 46, wherein the multiple TCI beam indication types comprise uplink-related TCI beam indication types. 
     Clause 49: The method of Clause 46, wherein the multiple TCI beam indication types comprise common beam TCI beam indication types. 
     Clause 50: The method of any one of Clauses 45-49, wherein the non-serving cell reference signals comprise either a synchronization signal block (SSB) of a non-serving cell or has an SSB of a non-serving cell as a quasi-collocated (QCL) source. 
     Clause 51: A method for wireless communications, comprising: receiving capability information from a user equipment (UE), wherein: the capability information comprises at least one capability related to one or more transmission configuration indication (TCI) beam indication types, and at least one of the one or more TCI beam indication types comprises a multi-channel beam indication type; transmitting, to the UE, a configuration for the multi-channel beam indication type, wherein the configuration is based on the received capability information; and communicating with the UE based on the configured multi-channel beam indication type. 
     Clause 52: The method of Clause 51, wherein the multi-channel beam indication type indicates a common TCI state for at least one downlink channel and at least one uplink channel. 
     Clause 53: The method of Clause 51, wherein the multi-channel beam indication type indicates a common TCI state for at least two downlink channels. 
     Clause 54: The method of Clause 51, wherein the multi-channel beam indication type indicates a common TCI state for at least two uplink channels. 
     Clause 55: The method of any one of Clauses 51-54, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of whether a reference signal for the respective TCI beam indication type can be from a non-serving cell. 
     Clause 56: The method of any one of Clauses 51-54, wherein the at least one capability comprises an indication of whether a reference signal for the one or more TCI beam indication types can be from a non-serving cell. 
     Clause 57: The method of any one of Clauses 51-56, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of a target signal for the respective TCI beam indication type. 
     Clause 58: The method of Clause 57, wherein the target signal comprises a target channel including one of a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), or a physical uplink shared channel (PUSCH). 
     Clause 59: The method of Clause 58, wherein the target channel is dynamically scheduled via downlink control information (DCI). 
     Clause 60: The method of Clause 58, wherein the target channel is semi-statically activated by a medium access control control element (MAC-CE). 
     Clause 61: The method of Clause 58, wherein the target channel is semi-statically activated by a radio resource control signaling. 
     Clause 62: The method of any one of Clauses 57-61, wherein the target signal comprises one of a synchronization signal block (SSB), channel state information reference signal (CSI-RS), or positioning reference signal (PRS). 
     Clause 63: The method of Clause 57, wherein the target signal comprises a sounding reference signal (SRS). 
     Clause 64: The method of any one of Clauses 51-63, wherein the, for each respective TCI beam indication type of the one or more TCI beam indication type, the at least one capability comprises a maximum number of activated TCI states per time-frequency resource. 
     Clause 65: The method of any one of Clauses 51-63, wherein the at least one capability comprises, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of activated TCI states per time-frequency resource for the multiple TCI beam indication types. 
     Clause 66: The method of Clause 65, wherein the multiple TCI beam indication types comprise downlink-related TCI beam indication types. 
     Clause 67: The method of Clause 65, wherein the multiple TCI beam indication types comprise uplink-related TCI beam indication types. 
     Clause 68: The method of Clause 65, wherein the multiple TCI beam indication types comprises common beam TCI beam indication types. 
     Clause 69: The method of any one of Clauses 64-68, wherein the time-frequency resource is one of a bandwidth part, a component carrier, or a control resource set (CORESET) pool index. 
     Clause 70: The method of Clause 69, wherein the maximum number of activated TCI states applies across all time-frequency resources of a same type. 
     Clause 71: The method of any one of Clauses 64-70, wherein the maximum number of activated TCI states per time-frequency resource is based on whether the time-frequency resource is from a non-serving cell. 
     Clause 72: The method of any one of Clauses 64-71, wherein a zero value in the capability information for any respective TCI beam indication type of the one or more TCI beam indication types indicates the UE does not support the respective TCI beam indication type. 
     Clause 73: The method of any one of Clauses 51-72, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises a maximum number of configured TCI states per time-frequency resource. 
     Clause 74: The method of any one of Clauses 51-72, wherein the capability information further comprises, for multiple TCI beam indication types of the one or more TCI beam indication types, a maximum number of configured TCI states per time-frequency resource for the multiple of TCI beam indication types. 
     Clause 75: The method of Clause 74, wherein the multiple TCI beam indication types comprises downlink-related TCI beam indication type. 
     Clause 76: The method of Clause 74, wherein the multiple TCI beam indication types comprises uplink-related TCI beam indication type. 
     Clause 77: The method of Clause 74, wherein the multiple TCI beam indication types comprises common beam TCI beam indication types. 
     Clause 78: The method of any one of Clauses 73-77, wherein the time-frequency resource is one of a bandwidth part, a component carrier, or a control resource set (CORESET) pool index. 
     Clause 79: The method of any one of Clauses 73-78, wherein the maximum number of configured TCI states applies across all time-frequency resources of a same type. 
     Clause 80: The method of any one of any one of Clauses 73-79, wherein a zero value in the capability information for any respective TCI beam indication type of the one or more TCI beam indication types indicates the user equipment does not support the respective TCI beam indication type. 
     Clause 81: The method of any one of Clauses 51-80, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprise an indication of whether the UE supports DCI-based beam update for the respective TCI beam indication type. 
     Clause 82: The method of any one of Clauses 51-80, wherein, for a set of multiple TCI beam indication types of the one or more TCI beam indication types, the at least one capability comprises an indication of whether the UE supports DCI-based beam update for the set of multiple TCI beam indication types. 
     Clause 83: The method of any one of Clauses 81-82, wherein the at least one capability comprises one or more DCI formats supported by the UE for DCI-based beam updates. 
     Clause 84: The method of any one of Clauses 51-83, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of support for common TCI state update for one or more time-frequency resources. 
     Clause 85: The method of any one of Clauses 51-83, wherein, for a subset of TCI beam indication types of the one or more TCI beam indication types, the at least one capability comprises an indication of support for common TCI state update for one or more time-frequency resources for the subset of TCI beam indication types. 
     Clause 86: The method of Clause 85, wherein the subset of TCI beam indication types comprises downlink-related TCI beam indication types. 
     Clause 87: The method of Clause 85, wherein the subset of TCI beam indication types comprises uplink-related TCI beam indication types. 
     Clause 88: The method of Clause 85, wherein the subset of TCI beam indication types comprises common beam TCI beam indication types. 
     Clause 89: The method of any one of Clauses 84-88, wherein the time-frequency resource is one of a bandwidth part, a component carrier, or a control resource set (CORESET) pool index. 
     Clause 90: The method of any one of Clauses 84-89, wherein the one or more time-frequency resources comprise a plurality of time-frequency resources for intra-band carrier aggregation. 
     Clause 91: The method of any one of Clauses 84-89, wherein the one or more time-frequency resources comprise a plurality of time-frequency resources for inter-band carrier aggregation. 
     Clause 92: The method of any one of Clauses 84-89, wherein the one or more time-frequency resources comprise a plurality of time-frequency resources for a band. 
     Clause 93: The method of any one of Clauses 84-89, wherein the one or more time-frequency resources comprise a plurality of time-frequency resources associated with the user equipment. 
     Clause 94: The method of any one of Clauses 51-93, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, the at least one capability comprises an indication of support for common TCI state pool for one or more time-frequency resources. 
     Clause 95: The method of any one of Clauses 51-94, wherein, for each respective TCI beam indication type of the one or more TCI beam indication types, an indication of whether the UE supports measurement and reporting of non-serving cell reference signals for the respective TCI beam indication type. 
     Clause 96: The method of any one of Clauses 51-94, wherein, for multiple TCI beam indication types of the one or more TCI beam indication types, an indication of whether the UE supports measurement and reporting of non-serving cell reference signals for the multiple TCI beam indication types. 
     Clause 97: The method of Clause 96, wherein the multiple TCI beam indication types comprise downlink-related TCI beam indication types. 
     Clause 98: The method of Clause 96, wherein the multiple TCI beam indication types comprise uplink-related TCI beam indication types. 
     Clause 99: The method of Clause 96, wherein the multiple TCI beam indication types comprise common beam TCI beam indication types. 
     Clause 100: The method of any one of Clauses 95-99, wherein the non-serving cell reference signals comprise either a synchronization signal block (SSB) of a non-serving cell or has an SSB of a non-serving cell as a quasi-collocated (QCL) source. 
     Clause 101: An apparatus, comprising: a memory comprising computer-executable instructions; one or more processors configured to execute the computer-executable instructions and cause the processing system to perform a method in accordance with any one of Clauses 1-100. 
     Clause 102: An apparatus, comprising means for performing a method in accordance with any one of Clauses 1-100. 
     Clause 103: A non-transitory computer-readable medium comprising computer-executable instructions that, when executed by one or more processors of a processing system, cause the processing system to perform a method in accordance with any one of Clauses 1-100. 
     Clause 104: A computer program product embodied on a computer-readable storage medium comprising code for performing a method in accordance with any one of Clauses 1-100. 
     Additional Wireless Communication Network Considerations 
     The techniques and methods described herein may be used for various wireless communications networks (or wireless wide area network (WWAN)) and radio access technologies (RATs). While aspects may be described herein using terminology commonly associated with 3G, 4G, and/or 5G (e.g., 5G new radio (NR)) wireless technologies, aspects of the present disclosure may likewise be applicable to other communication systems and standards not explicitly mentioned herein. 
     5G wireless communication networks may support various advanced wireless communication services, such as enhanced mobile broadband (eMBB), millimeter wave (mmWave), machine type communications (MTC), and/or mission critical targeting ultra-reliable, low-latency communications (URLLC). These services, and others, may include latency and reliability requirements. 
     Returning to  FIG. 1 , various aspects of the present disclosure may be performed within the example wireless communication network  100 . 
     In 3GPP, the term “cell” can refer to a coverage area of a NodeB and/or a narrowband subsystem serving this coverage area, depending on the context in which the term is used. In NR systems, the term “cell” and BS, next generation NodeB (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmission reception point may be used interchangeably. A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cells. 
     A macro cell may generally cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area (e.g., a sports stadium) and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG) and UEs for users in the home). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS, home BS, or a home NodeB. 
     BSs  102  configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC  160  through first backhaul links  132  (e.g., an S1 interface). BSs  102  configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) may interface with 5GC  190  through second backhaul links  184 . BSs  102  may communicate directly or indirectly (e.g., through the EPC  160  or 5GC  190 ) with each other over third backhaul links  134  (e.g., X2 interface). Third backhaul links  134  may generally be wired or wireless. 
     Small cell  102 ′ may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell  102 ′ may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP  150 . Small cell  102 ′, employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network. 
     Some base stations, such as BS  180  (e.g., a gNB) may operate in a traditional sub-6 GHz spectrum, in millimeter wave (mmWave) frequencies, and/or near mmWave frequencies in communication with the UE  104 . When the BS  180  operates in mmWave or near mmWave frequencies, the BS  180  may be referred to as an mmWave base station. 
     The communication links  120  between BSs  102  and, for example, UEs  104 , may be through one or more carriers. For example, BSs  102  and UEs  104  may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, and other MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell). 
     Wireless communication network  100  further includes a Wi-Fi access point (AP)  150  in communication with Wi-Fi stations (STAs)  152  via communication links  154  in, for example, a 2.4 GHz and/or 5 GHz unlicensed frequency spectrum. When communicating in an unlicensed frequency spectrum, the STAs  152 /AP  150  may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available. 
     Certain UEs  104  may communicate with each other using device-to-device (D2D) communication link  158 . The D2D communication link  158  may use the DL/UL WWAN spectrum. The D2D communication link  158  may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be through a variety of wireless D2D communications systems, such as for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, 4G (e.g., LTE), or 5G (e.g., NR), to name a few options. 
     EPC  160  may include a Mobility Management Entity (MME)  162 , other MMES  164 , a Serving Gateway  166 , a Multimedia Broadcast Multicast Service (MBMS) Gateway  168 , a Broadcast Multicast Service Center (BM-SC)  170 , and a Packet Data Network (PDN) Gateway  172 . MME  162  may be in communication with a Home Subscriber Server (HSS)  174 . MME  162  is the control node that processes the signaling between the UEs  104  and the EPC  160 . Generally, MME  162  provides bearer and connection management. 
     Generally, user Internet protocol (IP) packets are transferred through Serving Gateway  166 , which itself is connected to PDN Gateway  172 . PDN Gateway  172  provides UE IP address allocation as well as other functions. PDN Gateway  172  and the BM-SC  170  are connected to the IP Services  176 , which may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services. 
     BM-SC  170  may provide functions for MBMS user service provisioning and delivery. BM-SC  170  may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. MBMS Gateway  168  may be used to distribute MBMS traffic to the BSs  102  belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information. 
     5GC  190  may include an Access and Mobility Management Function (AMF)  192 , other AMFs  193 , a Session Management Function (SMF)  194 , and a User Plane Function (UPF)  195 . AMF  192  may be in communication with a Unified Data Management (UDM)  196 . 
     AMF  192  is generally the control node that processes the signaling between UEs  104  and 5GC  190 . Generally, AMF  192  provides QoS flow and session management. 
     All user Internet protocol (IP) packets are transferred through UPF  195 , which is connected to the IP Services  197 , and which provides UE IP address allocation as well as other functions for 5GC  190 . IP Services  197  may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services. 
     Returning to  FIG. 2 , various example components of BS  102  and UE  104  (e.g., the wireless communication network  100  of  FIG. 1 ) are depicted, which may be used to implement aspects of the present disclosure. 
     At BS  102 , a transmit processor  220  may receive data from a data source  212  and control information from a controller/processor  240 . The control information may be for the physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical hybrid ARQ indicator channel (PHICH), physical downlink control channel (PDCCH), group common PDCCH (GC PDCCH), and others. The data may be for the physical downlink shared channel (PDSCH), in some examples. 
     A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes. The MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH). 
     Transmit processor  220  may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Transmit processor  220  may also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), PBCH demodulation reference signal (DMRS), and channel state information reference signal (CSI-RS). 
     Transmit (TX) multiple-input multiple-output (MIMO) processor  230  may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers  232   a - 232   t . Each modulator in transceivers  232   a - 232   t  may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from the modulators in transceivers  232   a - 232   t  may be transmitted via the antennas  234   a - 234   t , respectively. 
     At UE  104 , antennas  252   a - 252   r  may receive the downlink signals from the BS  102  and may provide received signals to the demodulators (DEMODs) in transceivers  254   a - 254   r , respectively. Each demodulator in transceivers  254   a - 254   r  may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM) to obtain received symbols. 
     MIMO detector  256  may obtain received symbols from all the demodulators in transceivers  254   a - 254   r , perform MIMO detection on the received symbols if applicable, and provide detected symbols. Receive processor  258  may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE  104  to a data sink  260 , and provide decoded control information to a controller/processor  280 . 
     On the uplink, at UE  104 , transmit processor  264  may receive and process data (e.g., for the physical uplink shared channel (PUSCH)) from a data source  262  and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor  280 . Transmit processor  264  may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS)). The symbols from the transmit processor  264  may be precoded by a TX MIMO processor  266  if applicable, further processed by the modulators in transceivers  254   a - 254   r  (e.g., for SC-FDM), and transmitted to BS  102 . 
     At BS  102 , the uplink signals from UE  104  may be received by antennas  234   a - t,  processed by the demodulators in transceivers  232   a - 232   t , detected by a MIMO detector  236  if applicable, and further processed by a receive processor  238  to obtain decoded data and control information sent by UE  104 . Receive processor  238  may provide the decoded data to a data sink  239  and the decoded control information to the controller/processor  240 . 
     Memories  242  and  282  may store data and program codes for BS  102  and UE  104 , respectively. 
     Scheduler  244  may schedule UEs for data transmission on the downlink and/or uplink. 
     5G may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink. 5G may also support half-duplex operation using time division duplexing (TDD). OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth into multiple orthogonal subcarriers, which are also commonly referred to as tones and bins. Each subcarrier may be modulated with data. Modulation symbols may be 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 may be dependent on the system bandwidth. The minimum resource allocation, called a resource block (RB), may be 12 consecutive subcarriers in some examples. The system bandwidth may also be partitioned into subbands. For example, a subband may cover multiple RBs. NR may support a base subcarrier spacing (SCS) of 15 KHz and other SCS may be defined with respect to the base SCS (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, and others). 
     As above,  FIGS. 3A, 3B, 3C, and 3D  depict various example aspects of data structures for a wireless communication network, such as wireless communication network  100  of  FIG. 1 . 
     In various aspects, the 5G frame structure may be frequency division duplex (FDD), in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for either DL or UL. 5G frame structures may also be time division duplex (TDD), in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by  FIGS. 3A and 3C , the 5G frame structure is assumed to be TDD, with subframe  4  being configured with slot format  28  (with mostly DL), where D is DL, U is UL, and X is flexible for use between DL/UL, and subframe  3  being configured with slot format  34  (with mostly UL). While subframes  3 ,  4  are shown with slot formats  34 ,  28 , respectively, any particular subframe may be configured with any of the various available slot formats  0 - 61 . Slot formats  0 ,  1  are all DL, UL, respectively. Other slot formats  2 - 61  include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI), or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI). Note that the description below applies also to a 5G frame structure that is TDD. 
     Other wireless communication technologies may have a different frame structure and/or different channels. A frame (10 ms) may be divided into  10  equally sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. In some examples, each slot may include 7 or 14 symbols, depending on the slot configuration. 
     For example, for slot configuration  0 , each slot may include  14  symbols, and for slot configuration  1 , each slot may include  7  symbols. The symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission). 
     The number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration  0 , different numerologies (μ)  0  to  5  allow for 1, 2, 4, 8, 16, and 32 slots, respectively, per subframe. For slot configuration  1 , different numerologies  0  to  2  allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration  0  and numerology μ, there are 14 symbols/slot and 2μ slots/subframe. The subcarrier spacing and symbol length/duration are a function of the numerology. The subcarrier spacing may be equal to 2 μ ×15 kHz, where μ is the numerology  0  to  5 . As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=5 has a subcarrier spacing of 480 kHz. The symbol length/duration is inversely related to the subcarrier spacing.  FIGS. 3A, 3B, 3C, and 3D  provide an example of slot configuration  0  with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. 
     A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs)) that extends  12  consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme. 
     As illustrated in  FIG. 3A , some of the REs carry reference (pilot) signals (RS) for a UE (e.g., UE  104  of  FIGS. 1 and 2 ). The RS may include demodulation RS (DM-RS) (indicated as Rx for one particular configuration, where  100 x is the port number, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS), beam refinement RS (BRRS), and phase tracking RS (PT-RS). 
       FIG. 3B  illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE including nine RE groups (REGs), each REG including four consecutive REs in an OFDM symbol. 
     A primary synchronization signal (PSS) may be within symbol  2  of particular subframes of a frame. The PSS is used by a UE (e.g.,  104  of  FIGS. 1 and 2 ) to determine subframe/symbol timing and a physical layer identity. 
     A secondary synchronization signal (SSS) may be within symbol  4  of particular subframes of a frame. The 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 physical cell identifier (PCI). Based on the PCI, the UE can determine the locations of the aforementioned DM-RS. The physical broadcast channel (PBCH), which carries a master information block (MIB), may be logically grouped with the PSS and SSS to form a synchronization signal (SS)/PBCH block. The MIB provides a number of RBs in the 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. 
     As illustrated in  FIG. 3C , some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. The UE may transmit sounding reference signals (SRS). The SRS may be transmitted in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL. 
       FIG. 3D  illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and HARQ ACK/NACK feedback. The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and/or UCI. 
     Additional Considerations 
     The preceding description provides examples of providing UE capability information for one or more TCI beam indication types in communication systems. The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein are not limiting of the scope, applicability, or aspects set forth in the claims. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. For example, changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For instance, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method that is practiced using other structure, functionality, or structure and functionality in addition to, or other than, the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim. 
     The techniques described herein may be used for various wireless communication technologies, such as 5G (e.g., 5G NR), 3GPP Long Term Evolution (LTE), LTE-Advanced (LTE-A), code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single-carrier frequency division multiple access (SC-FDMA), time division synchronous code division multiple access (TD-SCDMA), and other networks. The terms “network” and “system” are often used interchangeably. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, and others. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA network may implement a radio technology such as NR (e.g. 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, and others. UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS). LTE and LTE-A are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP). cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). NR is an emerging wireless communications technology under development. 
     The various illustrative logical blocks, modules and circuits described in connection with the present disclosure may be implemented or performed with a general purpose processor, a DSP, an ASIC, a field programmable gate array (FPGA) or other programmable logic device (PLD), 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 commercially available 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, a system on a chip (SoC), or any other such configuration. 
     If implemented in hardware, an example hardware configuration may comprise a processing system in a wireless node. The processing system may be implemented with a bus architecture. The bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints. The bus may link together various circuits including a processor, machine-readable media, and a bus interface. The bus interface may be used to connect a network adapter, among other things, to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the case of a user equipment (see  FIG. 1 ), a user interface (e.g., keypad, display, mouse, joystick, touchscreen, biometric sensor, proximity sensor, light emitting element, and others) may also be connected to the bus. The bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further. The processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system. 
     If implemented in software, the functions may be stored or transmitted over as one or more instructions or code on a computer readable medium. Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The processor may be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media. A computer-readable storage medium may be coupled to a 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. By way of example, the machine-readable media may include a transmission line, a carrier wave modulated by data, and/or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which may be accessed by the processor through the bus interface. Alternatively, or in addition, the machine-readable media, or any portion thereof, may be integrated into the processor, such as the case may be with cache and/or general register files. Examples of machine-readable storage media may include, by way of example, RAM (Random Access Memory), flash memory, ROM (Read Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof. The machine-readable media may be embodied in a computer-program product. 
     A software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media. The computer-readable media may comprise a number of software modules. The software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions. The software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices. By way of example, a software module may be loaded into RAM from a hard drive when a triggering event occurs. During execution of the software module, the processor may load some of the instructions into cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When referring to the functionality of a software module below, it will be understood that such functionality is implemented by the processor when executing instructions from that software module. 
     As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c). 
     As used herein, the term “determining” encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like. 
     The methods disclosed herein comprise one or more steps or actions for achieving the methods. The method steps and/or actions may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims. Further, the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions. The means may include various hardware and/or software component(s) and/or module(s), including, but not limited to a circuit, an application specific integrated circuit (ASIC), or processor. Generally, where there are operations illustrated in figures, those operations may have corresponding counterpart means-plus-function components with similar numbering. 
     The following claims are not intended to be limited to the aspects shown herein, but are to be accorded the full scope consistent with the language of the claims. Within a claim, reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more.” Unless specifically stated otherwise, the term “some” refers to one or more. No claim element is to be construed under the provisions of 35 U.S.C. § 112(f) unless the element is expressly recited using the phrase “means for” or, in the case of a method claim, the element is recited using the phrase “step for.” All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims.