Patent ID: 12213137

DETAILED DESCRIPTION

A wireless communications system may support sidelink communication. Sidelink communication may be described as communication between two UEs. A slot marked for sidelink may include multiple symbols. A first symbol of the slot may be a duplicate of a symbol included in a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) resource allocation following the first symbol and, in some cases, may be used for automatic gain control (AGC). AGC allows a UE to change the gain of a received signal such that the signal falls within a range of an analog to digital converter (ADC). An AGC process may include determining a first coarse received signal strength indicator (RSSI) measurement, performing a first low noise amplifier (LNA) tuning based on the first coarse RSSI measurement, determining a refined RSSI measurement, and then performing a second LNA tuning based on the refined RSSI measurement. A course RSSI refers to measuring, at a first level of granularity, an RSSI of a signal received during an AGC symbol. A refined RSSI refers to measuring, at a level of granularity that is more refined than the first level of granularity, an RSSI of a signal received during an AGC symbol. Granularity refers to a scale size or measurement step size, And LNA is an amplifier that amplifies a very low-power signal without significantly degrading its signal-to-noise ratio (SNR).

When operating at a 30 kHz subcarrier spacing (SCS), the UE may perform the coarse RSSI measurement, the first LNA tuning, the refined RSSI measurement, and the second tuning within one AGC symbol. In some examples, the UE may operate in a higher frequency range (e.g., FR2-1 or FR2-2) with a higher SCS (e.g., 120 kilohertz (kHz)). Operating at the higher frequency range may result in shorter symbol durations. As such, a UE operating in the higher frequency range may be unable to complete AGC using the single AGC symbol.

In some examples, when a higher than 30 kHz SCS is used for sidelink communications, the UEs may use a modified sidelink slot structure for the sidelink communications. In one example, the slot structure may include at least two AGC symbols with at least one sidelink control channel symbol between the two AGC symbols. The UE may perform the coarse RSSI measurement and the first LNA tuning during the first AGC symbol, the second RSSI measurement during the sidelink control channel symbol, and the second LNA tuning during the second AGC symbol. The UE may receive a physical sidelink control channel (PSCCH) signal during the sidelink control channel symbol and use the first LNA tuning based on the coarse RSSI measurement for that reception as PSCCH may operate at a low SNR.

In some examples, the slot structure may include bundled slots to minimize per slot overhead associated with sidelink control channel symbols and AGC symbols. For example, at a high SCS, the slot structure may include a first slot including multiple AGC symbols. Subsequent bundled slots may not include AGC symbols. In some examples, the first slot may also include one or more sidelink control channel symbols (e.g., for PSCCH signals), and subsequent slots may only include data symbols. The determined AGC training and corresponding LNA tuning may be applied for multiple slots. Accordingly bundling refers to applying AGC for multiple slots. The number of slots that are bundled may depend on a resource allocation associated with the sidelink communications and a capability of the UE to bundle slots.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to timing diagrams, resource diagrams, and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to slot structure for automatic gain control for high SCS.

FIG.1illustrates an example of a wireless communications system100that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The wireless communications system100may include one or more base stations105, one or more UEs115, and a core network130. In some examples, the wireless communications system100may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communications system100may support enhanced broadband communications, ultra-reliable communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

The base stations105may be dispersed throughout a geographic area to form the wireless communications system100and may be devices in different forms or having different capabilities. The base stations105and the UEs115may wirelessly communicate via one or more communication links125. Each base station105may provide a coverage area110over which the UEs115and the base station105may establish one or more communication links125. The coverage area110may be an example of a geographic area over which a base station105and a UE115may support the communication of signals according to one or more radio access technologies.

The UEs115may be dispersed throughout a coverage area110of the wireless communications system100, and each UE115may be stationary, or mobile, or both at different times. The UEs115may be devices in different forms or having; different capabilities. Some example UEs115are illustrated inFIG.1. The UEs115described herein may be able to communicate with various types of devices, such as other UEs115, the base stations105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown inFIG.1.

In some examples, one or more components of the wireless communications system100may operate as or be referred to as a network node. As used herein, a network node may refer to any UE115, base station105, entity of a core network130, apparatus, device, or computing system configured to perform any techniques described herein. For example, a network node may be a UE115. As another example, a network node may be a base station105. As another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE115, the second network node may be a base station105, and the third network node may be a UE115. In another aspect of this example, the first network node may be a UE115, the second network node may be a base station105, and the third network node may be a base station105. In yet other aspects of this example, the first, second, and third network nodes may be different. Similarly, reference to a UE115, a base station105, an apparatus, a device, or a computing system may include disclosure of the UE115, base station105, apparatus, device, or computing system being a network node. For example, disclosure that a UE115is configured to receive information from a base station105also discloses that a first network node is configured to receive information from a second network node. In this example, consistent with this disclosure, the first network node may refer to a first UE115, a first base station105, a first apparatus, a first device, or a first computing system configured to receive the information; and the second network node may refer to a second UE115, a second base station105, a second apparatus, a second device, or a second computing system.

As described herein, a node, which may be referred to as a node, a network node, a network entity, or a wireless node, may be a base station (e.g., any base station described herein), a UE (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, one or more components, and/or another suitable processing entity configured to perform any of the techniques described herein. For example, a network node may be a UE. As another example, a network node may be a base station. As another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a UE. In another aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a base station. In yet other aspects of this example, the first, second, and third network node: may be different relative to these examples. Similarly, reference to a UE, base station, apparatus, device, computing system, or the like may include disclosure of the UE, base station, apparatus, device, computing system, or the like being a network node. For example, disclosure that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node. Consistent with this disclosure, once a specific example is broadened in accordance with this disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node), the broader example of the narrower example may be interpreted in the reverse, but in a broad open-ended way. In the example above where a UE being configured to receive information from a base station also discloses that a first network node being configured to receive information from a second network node, the first network node may refer to a first UE, a first base station, a first apparatus, a first device, a first computing system, a first one or more components, a first processing entity, or the like configured to receive the information; and the second network node may refer to a second UE, a second base station, a second apparatus, a second device, a second computing system, a first one or more components, a first processing entity, or the like.

As described herein, communication of information (e.g., any information, signal, or the like) may be described in various aspects using different terminology. Disclosure of one communication term includes disclosure of other communication terms. For example, a first network node may be described as being configured to transmit information to a second network node. In this example and consistent with this disclosure, disclosure that the first network node is configured to transmit information to the second network node includes disclosure that the first network node is configured to provide, send, output, communicate, or transmit information to the second network node. Similarly, in this example and consistent with this disclosure, disclosure that the first network node is configured to transmit information to the second network node includes disclosure that the second network node is configured to receive, obtain, or decode the information that is provided, sent, output, communicated, or transmitted by the first network node.

The base stations105may communicate with the core network130, or with one another, or both. For example, the base stations105may interface with the core network130through one or more backhaul links120(e.g. via an S1, N2, N3, or other interface). The base stations105may communicate with one another over the backhaul links120(e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations105), or indirectly (e.g., via core network130), or both. In some examples, the backhaul links120may be or include one or more wireless links. A UE115may communicate with the core network130through a communication link155.

One or more of the base stations105described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) a Home NodeB, a Home eNodeB, or other suitable terminology.

A UE115may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE115may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UE115may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.

The UEs115described herein may be able to communicate with various types of devices, such as other UEs115that may sometimes act as relays as well as the base stations105and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown inFIG.1.

The UEs115and the base stations105may wirelessly communicate with one another via one or more communication links125over one or more carriers. The term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links125. For example, a carrier used for a communication link125may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP)) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system100may support communication with a UE115using carrier aggregation or multi-carrier operation. A UE115may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration, Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be positioned according to a channel raster for discovery by the UEs115. A carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs115via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology).

The communication links125shown in the wireless communications system100may include uplink transmissions from a UE115to a base station105, or downlink transmissions from a base station105to a UE115. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode).

A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system100. For example, the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communications system100(e.g., the base stations105, the UEs115, or both) may have hardware configurations that support communications over a particular carrier bandwidth or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system100may include base stations105or UEs115that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE115may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and SCS are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements that a UE115receives and the higher the order of the modulation scheme, the higher the data rate may be for the UE115. A wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams), and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE115.

One or more numerologies for a carrier may be supported, where a numerology may include an SCS (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE115may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time and communications for the UE115may be restricted to one or more active BWPs.

The time intervals for the base stations105or the UEs115may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts=1/(Δfmax·Nf) seconds, where Δfmaxmay represent the maximum supported SCS, and Nfmay represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ins)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots. Alternatively, each frame may include a variable number of slots, and the number of slots may depend on SCS. Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communications systems100, a slot may further be divided into multiple mini-slots containing one or more symbols, Excluding the cyclic prefix, each symbol period may contain one or more (e.g., Nf) sampling periods. The duration of a symbol period may depend on the SCS or frequency band of operation.

A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system100and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communications system100may be dynamically selected (e.g. in bursts of shortened TTIs (sITTs)).

Physical channels may be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs115. For example, one or more of the UEs115may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs115and UE-specific search space sets for sending control information to a specific UE115.

Each base station105may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a base station105(e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area110or a portion of a geographic coverage area110(e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station105. For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas110, among other examples.

A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs115with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered base station105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells, Small cells may provide unrestricted access to the UEs115with service subscriptions with the network provider or may provide restricted access to the UEs115having an association with the small cell (e.g., the UEs115in a closed subscriber group (CSC), the UEs115associated with users in a home or office). A base station105may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers.

In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access for different types of devices.

In some examples, a base station105may be movable and therefore provide communication coverage for a moving geographic coverage area110. In some examples, different geographic coverage areas110associated with different technologies may overlap, but the different geographic coverage areas110may be supported by the same base station105, In other examples, the overlapping geographic coverage areas110associated with different technologies may be supported by different base stations105. The wireless communications system100may include, for example, a heterogeneous network in which different types of the base stations105provide coverage for various geographic coverage areas110using the same or different radio access technologies.

The wireless communications system100may support synchronous or asynchronous operation. For synchronous operation, the base stations105may have similar frame timings, and transmissions from different base stations105may be approximately aligned in time. For asynchronous operation, the base stations105may have different frame timings, and transmissions from different base stations105may, in some examples, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.

Some UEs115, such as MTC or IoT devices, may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication). M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station105without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program. Some UEs115may be designed to collect information or enable automated behavior of machines or other devices, Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.

Some UEs115may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously). In some examples, half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for the UEs115include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs115may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs)) within a carrier, within a guard-band of a carrier, or outside of a carrier.

The wireless communications system100may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system100may be configured to support ultra-reliable low-latency communications (URLLC). The UEs115may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.

In some examples, a UE115may also be able to communicate directly with other UEs115over a device-to-device (D2D) communication link135(e.g., using a peer-to-peer (P2P) or D2D protocol). The communication link135may be or may include a sidelink. One or more UEs115utilizing D2D communications may be within the geographic coverage area110of a base station105, Other UEs115in such a group may be outside the geographic coverage area110of a base station105or be otherwise unable to receive transmissions from a base station105. In some examples, groups of the UEs115communicating via D2D communications may utilize a one-to-many (1:M) system in which each UE115transmits to every other UE115in the group. In some examples, a base station105facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs115without the involvement of a base station105.

In some systems, the D2D communication link135may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs115). In some examples, vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., base stations105) using vehicle-to-network (V2N) communications, or with both.

The core network130may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network130may be an evolved packet core (EPC) or 5G core (5GC) which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs115served by the base stations105associated with the core network130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services150for one or more network operators. The IP services150may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service.

Some of the network devices, such as a base station105, may include subcomponents such as an access network entity140, which may be an example of an access node controller (ANC). Each access network entity140may communicate with the UEs115through one or more other access network transmission entities145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs). Each access network transmission entity145may include one or more antenna panels. In some configurations, various functions of each access network entity140or base station105may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station105).

The wireless communications system100may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. The UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs115located indoors. The transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

The wireless communications system100may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band, or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band. In some examples, the wireless communications system100may support millimeter wave (mmW) communications between the UEs115and the base stations105, and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device. The propagation of EHF transmissions, however, may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.

The electromagnetic spectrum is often subdivided, based on frequency/wavelength, into various classes, bands, channels, etc. In 5G NR two initial operating bands have been identified as frequency range designations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz-300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.

The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz-24.25 GHz). Frequency bands falling within FR3 may inherit FR1 characteristics and/or FR2 characteristics, and thus may effectively extend features of FR1 and/or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz-71 GHz), FR4 (52.6 GHz-114.25 GHz), and FR5 (114.25 GHz-300 GHz). Each of these higher frequency bands falls within the EHF band.

With the above aspects in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4. FR4-a or FR4-1, and/or FR5, or may be within the VHF band.

The wireless communications system100may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system100may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed radio frequency spectrum bands, devices such as the base stations105and the IEs115may employ carrier sensing for collision detection and avoidance. In some examples, operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA). Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

A base station105or a UE115may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station105or a UE115may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a base station105may be located in diverse geographic locations. A base station105may have an antenna array with a number of rows and columns of antenna ports that the base station105may use to support beamforming of communications with a UE115. Likewise, a UE115may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.

The base stations105or the UEs115may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station105, a UE115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation).

A base station105or a UE115may use beam sweeping techniques as part of beam forming operations. For example, a base station105may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station105multiple times in different directions. For example, the base station105may transmit a signal according; to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station105, or by a receiving device, such as a UE115) a beam direction for later transmission or reception by the base station105.

Some signals, such as data signals associated with a particular receiving device, may be transmitted by a base station105in a single beam direction (e.g., a direction associated with the receiving device, such as a UE115). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions. For example, a UE115may receive one or more of the signals transmitted by the base station105in different directions and may report to the base station105an indication of the signal that the UE115received with a highest signal quality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station105or a UE115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station105to a UE115). The UE115may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands. The base station105may transmit a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded unprecoded. The UE115may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted in one or more directions by abase station105, a UE115may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE115) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g. a UE115) may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station105, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

The wireless communications system100may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based A Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE115and a base station105or a core network130supporting radio bearers for user plane data. At the physical layer, transport channels may be mapped to physical channels.

The IEs115and the base stations105may support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link125. HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.

Techniques described herein, in addition to or as an alternative to be carried out between UEs115and base stations105, may be implemented via additional or alternative wireless devices, including IAB nodes104, distributed units (DUs)165, centralized units (CUs)160, radio units (RUs)170, and the like. For example, in some implementations, aspects described herein may be implemented in the context of a disaggregated radio access network (RAN) architecture (e.g., open RAN architecture), In a disaggregated architecture, the RAN may be split into three areas of functionality corresponding to the CU160, the DU165, and the RU170. The split of functionality between the CU160, DIU165, and RU175is flexible and as such gives rise to numerous permutations of different functionalities depending upon which functions (e.g., MAC functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at the CU160, DU165, and RU175. For example, a functional split of the protocol stack may be employed between a DU165and an RU170such that the DU165may support one or more layers of the protocol stack and the RU170may support one or more different layers of the protocol stack.

Some wireless communications systems (e.g., wireless communications system100), infrastructure and spectral resources for NR access may additionally support wireless backhaul link capabilities in supplement to wireline backhaul connections, providing an IAB network architecture. One or more base stations105may include CUs160, DUs165, and RUs170and may be referred to as donor base stations105or LAB donors. One or more DUs165(e.g., and/or RUs170) associated with a donor base station105may be partially controlled by CUs160associated with the donor base station105. The one or more donor base stations105(e.g., IAB donors) may be in communication with one or more additional base stations105(e.g. IAB nodes104) via supported access and backhaul links. IAB nodes104may support mobile terminal (MT) functionality controlled and/or scheduled by DUs165of a coupled TAB donor. In addition, the IAB nodes104may include DUs165that support communication links with additional entities (e.g., IAB nodes104, UEs115, etc.) within the relay chain or configuration of the access network (e.g., downstream). In such cases, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes104or components of IAB nodes104) may be configured to operate according to the techniques described herein.

In some examples, the wireless communications system100may include a core network130(e.g., a next generation core network (NGC)), one or more IAB donors, IAB nodes104, and ULs115, where IAB nodes104may be partially controlled by each other and/or the IAB donor. The IAB donor and IAB nodes104may be examples of aspects of base stations105. IAB donor and one or more IAB nodes104may be configured as (e.g., or in communication according to) some relay chain.

For instance, an access network (AN) or RAN may refer to communications between access nodes (e.g., IAB donor), IAB nodes104, and one or more UEs115. The IAB donor may facilitate connection between the core network130and the AN (e.g., via a wireline or wireless connection to the core network130). That is, an IAB donor may refer to a RAN node with a wireline or wireless connection to core network130. The IAB donor may include a CU160and at least one DU165(e.g., and RU170), where the CU160may communicate with the core network130over an NG interface (e.g., some backhaul link). The CU160may host layer 3 (L3) (e.g., RRC, service data adaption protocol (SDAP), PDCP, etc.) functionality and signaling. The at least one DU165and/or RU170may host lower layer, such as layer 1 (L1) and layer 2 (L2) (e.g. RLC MAC, physical (PHY), etc.) functionality and signaling, and may each be at least partially controlled by the CU160. The DU165may support one or multiple different cells. IAB donor and IAB nodes104may communicate over an F1 interface according to some protocol that defines signaling messages (e.g., F1 AP protocol). Additionally, CU160may communicate with the core network over an NG interface (which may be an example of a portion of backhaul link), and may communicate with other CU/s160(e.g., a CU160associated with an alternative IAB donor) over an Xn-C interface (which may be an example of a portion of a backhaul link).

IAB nodes104may refer to a RAN node that provides IAB functionality (e.g., access for UEs115, wireless self-backhauling capabilities, etc.). JAB nodes104may include a DU165and an MT. A DU165may act as a distributed scheduling node towards child nodes associated with the LAB node104, and the MT may act as a scheduled node towards parent nodes associated with the IAB node104. That is, an LAB donor may be referred to as a parent node in communication with one or more child nodes (e.g., an LAB donor may relay transmissions for UEs through one or more other IAB nodes104). Additionally, an IAB node104may also be referred to as a parent node or a child node to other IAB nodes104, depending on the relay chain or configuration of the AN. Therefore, the MT entity of LAB nodes104(e.g., MTs) may provide a Uu interface for a child node to receive signaling from a parent LAB node104, and the DU interface (e.g., DUs165) may provide a Uu interface for a parent node to signal to a child LAB node104or UE115.

For example, TAB node104may be referred to a parent node associated with IAB node, and a child node associated with IAB donor. The LAB donor may include a CU160with a wireline (e.g., optical fiber) or wireless connection to the core network and may act as parent node to IAB nodes104. For example, the DU165of IAB donor may relay transmissions to UEs115through LAB nodes104, and may directly signal transmissions to a UE115. The CU160of LAB donor may signal communication link establishment via an F1 interface to IAB nodes104, and the TAB nodes104may schedule transmissions (e.g., transmissions to the UEs115relayed from the IAB donor) through the DJs165. That is, data may be relayed to and from LAB nodes104via signaling over an NR Uu interface to MT of the IAB node104. Communications with TAB node104may be scheduled by DU165of LAB donor and communications with LAB node104may be scheduled by DU165of IAB node104.

In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes104or components of LAB nodes104) may be configured to support techniques for large round trip times in random access channel procedures as described herein. For example, some operations described as being performed by a UE115or a base station105may additionally or alternatively be performed by components of the disaggregated RAN architecture (e.g. IAB nodes, DUs, CUs, etc.).

A wireless communications system may support sidelink communication. Sidelink communication may be described as communication between two UEs. For example, a first UE115(e.g., a receiving UE115) may include a communications manager101and a second UE115(e.g., a transmitting UE115) may include a communications manager102. The communications manager101and the communications manager102may facilitate sidelink communications between the receiving UE115and the transmitting UE115over a sidelink communication link135. A slot marked for sidelink may include multiple symbols. A first symbol of the slot may be a duplicate of a symbol included in a PSSCH or a PSCCH resource allocation following the first symbol and, in some cases, may be used for AGC. AGC allows a receiving UE115to change the gain of a received signal such that the signal falls within a range of an ADC of the receiving UE115. An AGC process may include determining a first coarse RSSI measurement, performing a first LNA tuning based on the coarse RSSI measurement, determining a refined RSSI measurement, and then performing a second LNA tuning based on the refined RSSI measurement. Accordingly, the communications manager101may include an AGC manager, an LNA, and an ADC.

When operating at a 30 kHz SCS, the receiving UE115may perform the coarse RSSI measurement, the first LNA tuning, the refined RSSI measurement, and the second tuning within one AGC symbol. In some examples, the receiving UE115may operate in a higher frequency range (e.g., FR2-1 or FR2-2) with an SCS (e.g., 120 kilohertz (kHz)). Operating at the higher frequency range may result in shorter symbol durations. As such, a receiving UE115operating in the higher frequency range may be unable to complete AGC using the single AGC symbol.

In some examples, when a higher than 30 kHz SCS is used for sidelink communications, the UE115may use a modified sidelink slot structure for the sidelink communications. In one example, the slot structure may include at least two AGC symbols with at least one sidelink control channel symbol between the two AGC Symbols. The receiving UE115may perform the coarse RSSI measurement and the first LNA tuning during the first AGC symbol, the second RSSI measurement during the sidelink control channel symbol, and the second LNA tuning during the second AGC symbol. The receiving UE115may receive a physical sidelink control channel (PSCCH) signal during the sidelink control channel symbol and use the first LNA tuning based on the coarse RSSI measurement for that reception as PSCCH may operate at a low SNR.

In some examples, the slot structure may include bundled slots to minimize per slot overhead associated with sidelink control channel symbols and AGC symbols. For example, at a high SCS, the slot structure may include a first slot including multiple AGC symbols. Subsequent bundled slots may not include AGC symbols. In some examples, the first slot may also include one or more sidelink control channel symbols (e.g., for PSCCH signals), and subsequent slots may only include data symbols. The determined AGC training and corresponding LNA tuning may be applied for multiple slots. Accordingly bundling refers to applying AGC for multiple slots. The number of slots that are bundled may depend on a resource allocation associated with the sidelink communications and a capability of the receiving UE115to bundle slots.

FIG.2illustrates an example of a wireless communications system200that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The wireless communications system200illustrates an example of communications between a base station105-aassociated with a geographic coverage area110-a, a UE115-a, and a UE115-b, which may be examples of corresponding devices described herein, including with reference toFIG.1.

The UE115-aand the UE115-bmay be located within the geographic coverage area110-aof the base station105-aand may communicate with the base station105-ausing a communication link125-aand a communication link125-b, respectively, which may be examples of NR or LTE links between the UE115-aor the UE115-b, respectively, and the base station105-a. The communication link125-aand the communication link125-b, may include bi-directional links that enable both uplink and downlink communication. For example, the UE115-amay transmit uplink signals, such as uplink control signals or uplink data signals, to the base station105-ausing the communication link125-aand the base station105-amay transmit downlink transmissions, such as downlink control signals or downlink data signals, to the UE115-ausing the communication link125-a. By way of another example, the UE115-bmay transmit uplink signals, such as uplink control signals or uplink data signals, to the base station105-ausing the communication link125-band the base station105-amay transmit downlink transmissions, such as downlink control signals or downlink data signals, to the UE115-busing the communication link125-b.

The UE115-amay communicate with the UE115-busing a sidelink communication link135-a. The sidelink communication link135-amay include a bi-directional link that enable the UE115-ato transmit signals to and receive signals from the UE115-b. In some examples, the base station105-amay configure resources for the sidelink communication link135-a. In some examples, the UE115-amay communicate with the UE115-bover the sidelink communication link135-ausing directional communications techniques (e.g., beamforming techniques).

In some examples, the UE115-amay receive sidelink communications225from the UE115-b. In order to receive and decode sidelink communications225from the UE115-b, a communications manager101-aat the UE115-amay include an AGC manager210, one or more LNAs215, and an ADC220. In order to transmit sidelink communications225, the UE115-bmay include a communications manager102-a. The function of an ADC220may be to transform analog signals into a digital form such that the information may be read and processed by the UE115-a. In some examples, the ADC220may have an associated range, where the associated range specifies the maximum and minimum voltage that may be input into the ADC220. In order for the ADC220to function properly, the received sidelink signal may be within the range of the ADC220.

The UE115-amay monitor a symbol of the sidelink slot for sidelink transmissions225from the UE115-band determine an amount to adjust a gain of the UE115-a(e.g., receiver gain) such that future transmissions (e.g., PSSCH transmissions, PSCCH transmissions, or physical sidelink feedback channel (PSFCH) transmissions) may fall within the range of the ADC220. The symbols over which the UE115-amonitors for the sidelink transmissions225for the purpose of gain adjustment may be known as AGC symbols. In some examples, the first symbol of the sidelink slot (e.g., the symbol that conics before the symbols allocated for PSSCH transmissions) may be the AGC symbol for PSSCH transmissions and the AGC symbol may be a replication of the first symbol allocated for PSSCH transmissions (e.g., second symbol in the sidelink slot). Additionally, the first symbol of the symbols allocated for PSFCH may be the AGC symbol for PSFCH transmissions and the AGC symbol may be a replication of the second symbol allocated for PSFCH transmissions. In either case, a single symbol may be used for AGC.

In some examples, the sidelink communication link135-amay be or may support a Cellular Vehicle to Everything (CV2X) mode. In CV2X, a UE115-amay receive signals from multiple sources from varying path loss, and accordingly a dedicated single symbol may be used for AGC tuning at the beginning of every CV2X slot. As described herein, in a CV2X mode, the UE.115-amay use the AGC symbol for RSSI measurement and LNA tuning.

In some examples, the UE115-aand the UE115-bmay operate in high frequency ranges. For example, the UE115-aand the UE115-bmay operate in FR2 which may include a frequency range of 24.25 GHz to 52.6 GHz. At the higher frequency range, the SCS may increase (e.g., to 120 kHz) and a duration of the symbols may decrease (e.g., to approximately 9 μsec). When compared to a lower frequency range (e.g., FR1). Because the symbol duration is relatively short, the UE115-amay be unable to perform AGC within one symbol. Allocating multiple symbols for AGC (e.g., 4 symbols for 120 kHz), may result in high resource overhead, especially for achieving a high SNR to support 256 quadrature amplitude modulation.

As described herein, the UE115-aand the UE115-bmay use modified slot structures to perform AGC for higher SCS. The UE115-bmay transmit, to the UE115-a, an indication230of an SCS to be used for the sidelink communications225. The UE115-aand the UE115-bmay determine a slot structure for the sidelink communications based on the indicated SCS. In some examples, the UE115-aand/or the UE115-bmay select the slot structure from a set of slot structures based on the SCS being above a threshold. In some examples, the threshold may be 30 kHz.

In some examples, the slot structure may include a first AGC symbol, a second AGC symbol, and at least one sidelink control channel symbol between the first AGC symbol and the second AGC symbol. In some examples, the UE115-amay perform an AGC procedure for the sidelink communications225during an automatic gain control period that includes at least the first AGC symbol, the second AGC symbol, and the sidelink control channel symbol. In some examples, performing the AGC procedure may include: measuring, at a first level of granularity, a first received signal strength during the first AGC symbol; tuning one or more LNAs of the UE115-aduring the first AGC symbol and based on the first received signal strength; measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during the sidelink control channel symbol; and tuning the LNA(s) of the UE115-aduring the second AGC symbol and based on the second received signal strength. The UE115-amay receive and demodulate the remaining control and data symbols of the slot structure for the sidelink communications225based on applying AGC based on the AGC procedure performed during AGC period.

In some examples, the slot structure may include a set of AGC symbols within a first slot of a set of slots, where the AGC symbols pertain to the set of slots. In some examples, the slot structure may further include a sidelink control channel symbol within a first slot of the set of slots, the sidelink control channel symbol pertaining to the set of slots. In some examples, the slot structure may include a second slot including all data symbols (e.g., the second slot not including AGC symbols or sidelink control channel symbols). In some examples, a last symbol of a last slot of the set of slots of the slot structure may include a guard symbol and the last symbol of the other slots of the set of slots may include a data symbol. The UE115-amay perform the AGC procedure during an AGC period that includes the set of AGC symbols. In some examples, performing the AGC procedure may include: measuring, at a first level of granularity, a first received signal strength during a first AGC symbol of the set of AGC symbols; tuning one or more LNAs of the UE115-aduring the first AGC symbol and based on the first received signal strength; measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during a second AGC symbol of the set of AGC symbols; and tuning the LNA(s) of the UE115-aduring a third AGC symbol of the set of AGC symbols and based on the second received signal strength. The UE115-amay receive and demodulate the remaining control and data symbols of the slots of the slot structure for the sidelink communications225based on applying AGC based on the AGC procedure performed during AGC period. In some examples, where the AGC symbols pertain to the set of slots, the UE115-amay apply AGC to the set of slots. In some examples, the number of the set of slots may be based on a resource pool associated with the sidelink communications.

FIG.3illustrates an example of a timing diagram300that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. In some examples, the timing diagram300may be implemented by or may implement aspects of the wireless communications system100or200.

As described herein, an AGC procedure may include a first measurement step320. The first measurement step320may last approximately 3 μs. During the first measurement step320, the receiving UE115may perform RSSI measurements at a first level of granularity. The AGC procedure may also include a first LNA tuning period325. The first LNA tuning period325may last approximately 6 μs. The first LNA tuning period325may include tuning one or more LNAs of the UE115based on the first RSSI measurements performed during the first measurement step320. The AGC procedure may also include a second measurement step330. The second measurement step may last approximately 12 is. During the second measurement step330, the UE115may perform RSSI measurements at a second level of granularity that is more refined than the first level of granularity. The AGC procedure may also include a second LNA tuning period335. The second LNA tuning period335may last approximately 6 μs. The second LNA tuning period335may include tuning the one or more LNAs of the UE115based on the first RSSI measurements performed during the second measurement step330.

The steps (320,325,330, and335) of the AGC process may last approximately 27 μs total. Accordingly, for an NR Symbol time of 35.5 μs at an SCS of 30 kHz, the UE115may perform the entire AGC process in a single AGC symbol. For higher SCS operations, the symbol length may decrease and the UE115may not be able to perform the entire AGC process in a single symbol. For example, at 120 kHz SCS, each symbol may be approximately 9 is. Accordingly, the AGC process may last 3 symbols at 120 kHz SCS. Dedicating 3 symbols to the AGC process may result in increased resource overhead.

FIG.4illustrates an example of a resource diagram400that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. In some examples, the resource diagram400may be implemented by or may implement aspects of the wireless communications system100or200.

The resource diagram400illustrates a slot structure455-afor high SCS sidelink communications. The slot structure455-aincludes a slot450including 14 symbols. The slot450includes a first AGC symbol405, a second AGC symbol415, and a sidelink control channel symbol410(e.g., for receiving a PSCCH transmission) between the first AGC symbol405and the second AGC symbol415. In some examples, the receiving UE115may perform an AGC procedure for the sidelink communications during an AGC period460that includes at least the first AGC symbol405, the second AGC symbol415, and the sidelink control channel symbol410. In some examples, performing the AGC procedure may include: measuring, at a first level of granularity, a first received signal strength during the first AGC symbol405; tuning one or more LNA(s) of the UE115during the first AGC symbol405and based on the first received signal strength: measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during the sidelink control channel symbol410; and tuning the LNA(s) of the UE115during the second AGC symbol415and based on the second received signal strength. Half of the resources of the fourth symbol (symbol3) may be used to receive a control signal or a data signal via resources425, and the other half may be used to receive a control signal via resources420. Half of the resources of the fifth symbol (symbol4) may be used to receive a control signal or a data signal via resources430, and the other half may be used to receive a data signal via resources435. The sixth through thirteenth symbols (symbols5-12) may be used as data symbols (e.g., data symbols440-athrough440-h), and a last symbol of the slot structure may be a guard symbol445.

After the AGC period460, the receiving UE115may receive and demodulate the remaining control and data symbols of the slot structure455-afor the sidelink communications based on applying; AGC based on the AGC procedure performed during AGC period460. Overall, the slot structure455-auses 2 symbols dedicated for AGC instead of using 3 or 4 symbols, and accordingly may save resource overhead. In some examples, the first AGC symbol405may be a copy of the second symbol, the sidelink control channel symbol410. In some examples, the second AGC symbol415may be a copy of the fourth symbol (symbol3). In some examples, the received power of the signals received in the first AGC symbol405and the second AGC symbol415may be the same as the receive power of the other signals received in the other symbols of the slot450.

As illustrated, the slot structure455-amay include PSCCH spanning the frequency resources of the slot in the sidelink control channel symbol410. If the resource allocation to the slot is small (e.g.,10resource blocks), the PSCCH may continue into the fourth symbol (e.g., into resources420). If the resource allocation is large, the PSCCH for the slot450may be entirely allocated into the second symbol (sidelink control channel symbol410). The PSCCH may use repetition to capture the entire bandwidth allocated for the slot for the PSCCH so that the second symbol maw be used for measuring RSSI The PSCCH parts in the second and fourth symbols (e.g., symbols1and3) may have different AGC states (e.g., the PSCCH in symbol1may use the AGC state after course LNA tuning and the PSCCH in symbol3may use the AGC state after the refined LNA tuning) and may be demodulated separately and combined for polar decoding. The second part of the PSCCH in resources425and resources430may be pail of the PSSCH for demodulation purposes.

FIG.5illustrates an example of a resource diagram500that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. In some examples, the resource diagram500may be implemented by or may implement aspects of the wireless communications system100or200.

The resource diagram500illustrates a slot structure455-bfor high SCS sidelink communications. The slot structure455-bmay include a set of AGC symbols560within a first slot555-aof a set of slots555, where the set AGC symbols560pertain to the set of slots555. The set of AGC symbols560may include a first AGC symbol505in symbol0, a second AGC symbol510in symbol1, and a third AGC symbol515in symbol2. In some examples, the slot structure455-bmay further include one or more sidelink control channel symbol within the first slot555-aof the set of slots555, the sidelink control channel symbol pertaining to the set of slots555. For example, the first slot555-amay include sidelink control channel resources520,525,530,535, and540in symbols3,4, and4of the first slot555-a. The remaining symbols (symbols5through13) of the first slot555-amay be data symbols545-athrough545-h.

In some examples, the slot structure455-bmay include a second slot including all data symbols (e.g., the second slot not including AGC symbols or sidelink control channel symbols). In some examples, a last symbol (symbol13) of a last slot555-bof the set of slots555of the slot structure455-bmay include a guard symbol550and the last symbol of the other slots of the set of slots555may include a data symbol. The other symbols (symbols0-12) of the last slot555-bmay include data symbols545-ithrough545-u.

The UE115-amay perform the AGC procedure during an AGC period that includes the set of AGC symbols560. In some examples, performing the AGC procedure may include: measuring, at a first level of granularity, a first received signal strength during the first AGC symbol505of the set of AGC symbols560: tuning one or more LNAs of the UE115during the first AGC symbol505and based on the first received signal strength; measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during a second AGC symbol510of the set of AGC symbols560; and tuning the LNA(s) of the UE115during a third AGC symbol515of the set of AGC symbols560and based on the second received signal strength. In some examples, the received power of the signals received in the first AGC symbol505, the second AGC symbol510, and the third AGC symbol515may be the same as the receive power of the other signals received in the other symbols of the slots555.

The UE115may receive and demodulate the remaining control and data symbols of the slots of the slot structure455-bfor the sidelink communications based on applying AGC based on the AGC procedure performed during the AGC symbols560. In some examples, where the AGC symbols560pertain to the set of slots, the UE115-amay apply AGC to the set of slots555. In some examples, the number of the set of slots555may be based on a resource pool associated with the sidelink communications.

Bundling slots (e.g., using the AGC procedure in the first slot555-afor the set of slots555) may reduce resource overhead associated with AGC. All slots in the bundled set of slots555may have the same resource allocation (e.g., frequency resources), and slots may be bundled per resource allocation. In some examples, the bundle size (e.g., the number of slots bundled together) may be based on the resource pool size (e.g., may be a property of the resource pool of the sidelink communications), In some examples, the bundle size may be based on a capability of the UE115to bundle slots together (e.g., based on a capability of the UE115to apply AGC tuning across slots of the transmitting UE115to maintain transmission phase or power continuity across slots) For example, phase continuity between slots in the same bundle may or may not be preserved based on the capability of the transmitting UE115or a property of the resource pool. If phase continuity is enable, the transmitting UE115may enable demodulation reference signal structures to optimize AGC performance and reduce overhead.

FIG.6illustrates an example of a process flow600that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. In some examples, the process flow600may be implemented by or may implement aspects of the wireless communications system100or200. The process flow600may include a UE115-cand a UP115-d, which may examples of a UE115as described herein. In the following description of the process flow600, the operations between the UE115-cand the UT115-dmay be transmitted in a different order than the example order shown, or the operations performed by the UE115-cand the UE115-dmay be performed in different orders or at different times. Some operations may also be omitted from the process flow600, and other operations may be added to the process flow600.

At605, the UE115-dmay transmit, to the UE115-c, an indication of an SCS to be used for sidelink communications between the UE115-dand the UE115-c.

At610, the UE115-cmay determine a slot structure for the sidelink communications based on the indicated SCS. At615, the UE115-dmay determine the slot structure for the sidelink communications based on the indicated SCS. In some examples, the UE115-cand/or the UE115-dmay select the slot structure from a set of slot structures based on the SCS being above a threshold. In some examples, the threshold may be 30 kHz. In some examples, the UE115-cmay indicate the slot structure to the UE115-d, In some examples, the UE115-dmay indicate the slot structure to the UE115-c. In some examples, the network (e.g., a serving base station) may configure the SCS and the slot structure for the sidelink communications.

In some examples, the slot structure may include a first AGC symbol, a second AGC symbol, and a sidelink control channel symbol between the first AGC symbol and the second AGC symbol.

In some examples, at620, the UE115-dmay transmit sidelink communications including the AGC symbols. In some examples, the UE115-cmay receive, from the UE115-d, a first instance of a first signal during the temporally first symbol of the slot structure and a second instance of the first signal during a temporally second symbol of the slot structure, where the temporally first symbol of the slot structure is the first AGC symbol, and the temporally second symbol of the slot structure is the sidelink control channel symbol. In some examples, the UE115-cmay receive, in the sidelink control channel symbol, a sidelink control channel signal spanning a resource allocation of a sidelink shared channel associated with the sidelink control channel signal, the sidelink control channel symbol being a temporally second symbol of the slot structure.

In some examples, at625in some examples the UE115-cmay perform an AGC procedure for the sidelink communications during an AGC period that includes at least the first AGC symbol, the second AGC symbol, and the sidelink control channel symbol. In some examples, performing the AGC procedure may include: measuring, at a first level of granularity, a first received signal strength during the first AGC symbol; tuning an LNA of the UE115-cduring the first AGC symbol and based on the first received signal strength; measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during the sidelink control channel symbol; and tuning the LNA of the UE115-cduring the second AGC symbol and based on the second received signal strength.

In some examples, at630, the UE115-dmay transmit sidelink communications in accordance with the slot structure including control and/or data symbols. In some examples, in the temporally fourth symbol of the slot structure, and following the second AGC symbol a second portion of the sidelink control the UE115-cmay receive a second portion of the sidelink control channel signal spanning a portion of the sidelink resource allocation.

In some examples, at635the UE115-cmay receive and demodulate the sidelink communications received at630based on applying AGC based on the AGC procedure performed at625. In some examples, the UE115-cmay apply AGC based on the AGC procedure performed at625to a set of bundled slots.

In some examples, the UE.115-cmay receive, from the UE115-d, a first instance of a second signal during a temporally third symbol of the slot structure, and a second instance of the second signal during a temporally fourth symbol of the slot structure, where the temporally third symbol of the slot structure is the second AGC symbol. In some examples, the UE115-cmay receive, from the UE115-d, a first instance of a first signal during the first AGC symbol, a second instance of the first signal during the slot structure, a first instance of a second signal during the second automatic gain control symbol, and a second instance of the second signal during the slot structure. In some examples, the UE115-cmay receive, from the UE.115-d, a first signal during the first automatic gain control symbol, and a second signal during, the second automatic gain control symbol, where the first AGC symbol and the second AGC symbol are both of a same receive power as the other signals received during other symbols of the slot structure received at630.

Returning to610and615, in some examples, the slot structure may include a set of AGC symbols within a first slot of a set of slots, where the AGC symbols pertain to the set of slots. In some examples, the slot structure may further include a sidelink control channel symbol within a first slot of the set of slots, the sidelink control channel symbol pertaining to the set of slots. In some examples, the slot structure may include a second slot including all data symbols (e.g., the second slot not including AGC symbols or sidelink control channel symbols). In some examples, a last symbol of a last slot of the set of slots of the slot structure may include a guard symbol and the last symbol of the other slots of the set of slots may include a data symbol.

In some examples, where the AGC symbols pertain to the set of slots, at625, the UE115-cmay perform the AGC procedure during an AGC period that includes the set of AGC symbols. In son examples, performing the AGC procedure at625may include: measuring, at a first level of granularity, a first received signal strength during a first AGC symbol of the set of AGC symbols; tuning a LNA of the UE115-cduring the first AGC symbol and based on the first received signal strength; measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during a second AGC symbol of the set of AGC symbols; and tuning the LNA of the UE115-cduring a third AGC symbol of the set of AGC symbols and based on the second received signal strength.

In some examples, where the AGC symbols pertain to the set of slots, at635the UE115-cmay apply AGC to the set of slots. In some examples, the number of the set of slots may be based on a resource pool associated with the sidelink communications.

FIG.7shows a block diagram700of a device705that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The device705may be an example of aspects of a UE115as described herein. The device705may include a receiver710, a transmitter715, and a communications manager720. The device705may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver710may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to slot structure for automatic gain control for high SCS). Information may be passed on to other components of the device705. The receiver710may utilize a single antenna or a set of multiple antennas.

The transmitter715may provide a means for transmitting signals generated by other components of the device705. For example, the transmitter715may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to slot structure for automatic gain control for high SCS). In some examples, the transmitter715may be co-located with a receiver710in a transceiver module. The transmitter715may utilize a single antenna or a set of multiple antennas.

The communications manager720, the receiver710, the transmitter715, or various combinations thereof or various components thereof may be examples of means for performing various aspects of slot structure for automatic gain control for high SCS as described herein. For example, the communications manager720, the receiver710, the transmitter715, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager720, the receiver710, the transmitter715, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory).

Additionally or alternatively, in some examples, the communications manager720, the receiver710, the transmitter715, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager720, the receiver710, the transmitter715, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure).

In some examples, the communications manager720may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using; or otherwise in cooperation with the receiver710, the transmitter715, or both. For example, the communications manager720may receive information from the receiver710, send information to the transmitter715, or be integrated in combination with the receiver710, the transmitter715, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager720may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager720may be configured as or otherwise support a means for receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The communications manager720may be configured as or otherwise support a means for receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol. The communications manager720may be configured as or otherwise support a means for performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes at least the first automatic gain control symbol and the second automatic gain control symbol.

Additionally or alternatively, the communications manager720may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager720may be configured as or otherwise support a means for receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The communications manager720may be configured as or otherwise support a means for receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots. The communications manager720may be configured as or otherwise support a means for performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes the set of multiple automatic gain control symbols.

Additionally or alternatively, the communications manager720may support wireless communications at a second UE in accordance with examples as disclosed herein. For example, the communications manager720may be configured as or otherwise support a means for transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The communications manager720may be configured as or otherwise support a means for transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol.

Additionally or alternatively, the communications manager720may support wireless communications at a second UE in accordance with examples as disclosed herein. For example, the communications manager720may be configured as or otherwise support a means for transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The communications manager720may be configured as or otherwise support a means for transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots.

By including or configuring the communications manager720in accordance with examples as described herein, the device705(e.g., a processor controlling or otherwise coupled to the receiver710, the transmitter715, the communications manager720, or a combination thereof) may support techniques for more efficient utilization of communication resources via enabling a UE to perform an AGC process at high SCS.

FIG.8shows a block diagram800of a device805that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The device805may be an example of aspects of a device705or a UE115as described herein. The device805may include a receiver810, a transmitter815, and a communications manager820. The device805may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver810may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to slot structure for automatic gain control for high SCS). Information may be passed on to other components of the device805. The receiver810may utilize a single antenna or a set of multiple antennas.

The transmitter815may provide a means for transmitting signals generated by other components of the device805. For example, the transmitter815may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to slot structure for automatic gain control for high SCS). In some examples, the transmitter815may be co-located with a receiver810in a transceiver module. The transmitter815may utilize a single antenna or a set of multiple antennas.

The device805, or various components thereof, may be an example of means for performing various aspects of slot structure for automatic gain control for high SCS as described herein. For example, the communications manager820may include an SCS manager825, a slot structure manager830, an AGC manager835, or any combination thereof. The communications manager820may be an example of aspects of a communications manager720as described herein. In some examples, the communications manager820, or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver810, the transmitter815, or both. For example, the communications manager820may receive information from the receiver810, send information to the transmitter815, or be integrated in combination with the receiver810, the transmitter815, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager820may support wireless communications at a first UE in accordance with examples as disclosed herein. The SCS manager825may be configured as or otherwise support a means for receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The slot structure manager830may be configured as or otherwise support a means for receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol. The AGC manager835may be configured as or otherwise support a means for performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes at least the first automatic gain control symbol and the second automatic gain control symbol.

Additionally or alternatively, the communications manager820may support wireless communications at a first UE in accordance with examples as disclosed herein. The SCS manager825may be configured as or otherwise support a means for receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The slot structure manager830may be configured as or otherwise support a means for receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots. The AGC manager835may be configured as or otherwise support a means for performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes the set of multiple automatic gain control symbols.

Additionally or alternatively, the communications manager820may support wireless communications at a second UE in accordance with examples as disclosed herein. The SCS manager825may be configured as or otherwise support a means for transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The slot structure manager830may be configured as or otherwise support a means for transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol.

Additionally or alternatively, the communications manager820may support wireless communications at a second UE in accordance with examples as disclosed herein. The SCS manager825may be configured as or otherwise support a means for transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The slot structure manager830may be configured as or otherwise support a means for transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots.

FIG.9shows a block diagram900of a communications manager920that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The communications manager920may be an example of aspects of a communications manager720, a communications manager820, or both, as described herein. The communications manager920, or various components thereof, may be an example of means for performing various aspects of slot structure for automatic gain control for high SCS as described herein. For example, the communications manager920may include an SCS manager925, a slot structure manager930, an AGC manager935, a sidelink reception manager940, a sidelink control channel manager945, a received signal strength manager950, an LNA tuning manager955, a guard symbol manager960, a sidelink transmission manager965, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager920may support wireless communications at a first UE in accordance with examples as disclosed herein. The SCS manager925may be configured as or otherwise support a means for receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The slot structure manager930may be configured as or otherwise support a means for receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol. The AGC manager935may be configured as or otherwise support a means for performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes at least the first automatic gain control symbol and the second automatic gain control symbol.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for applying, based on the automatic gain control procedure, an automatic gain control to the sidelink communications that occur over a set of multiple slots.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a first instance of a first signal during a temporally first symbol of the slot structure. In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a second instance of the first signal during a temporally second symbol of the slot structure, where the temporally first symbol of the slot structure is the first automatic gain control symbol, and where the temporally second symbol of the slot structure is the sidelink control channel symbol.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a first instance of a second signal during a temporally third symbol of the slot structure. In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a second instance of the second signal during a temporally fourth symbol of the slot structure, where the temporally third symbol of the slot structure is the second automatic gain control symbol.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a first instance of a first signal during the first automatic gain control symbol. In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a second instance of the first signal during the slot structure. In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a first instance of a second signal during the second automatic gain control symbol. In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a second instance of the second signal during the slot structure.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a first signal during the first automatic gain control symbol. In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a second signal during the second automatic gain control symbol, where the first automatic gain control symbol and the second automatic gain control symbol are both of a same receive power as other signals received during other symbols of the slot structure.

In some examples, the sidelink control channel manager945may be configured as or otherwise support a means for receiving, in the sidelink control channel symbol, a sidelink control channel signal spanning a resource allocation of a sidelink shared channel associated with the sidelink control channel signal, the sidelink control channel symbol being a temporally second symbol of the slot structure.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving, in a temporally fourth symbol of the slot structure and following the second automatic gain control symbol, a second portion of the sidelink control channel signal spanning a portion of the resource allocation.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for demodulating the sidelink control channel signal received in the temporally second symbol and the second portion of the sidelink control channel signal received in the temporally fourth symbol separately.

In some examples, the received signal strength manager950may be configured as or otherwise support a means for measuring, at a first level of granularity, a first received signal strength during the first automatic gain control symbol. In some examples, the LNA tuning manager955may be configured as or otherwise support a means for tuning a low noise amplifier of the first UE during the first automatic gain control symbol and based on the first received signal strength. In some examples, the received signal strength manager950may be configured as or otherwise support a means for measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during the sidelink control channel symbol. In some examples, the LNA tuning manager955may be configured as or otherwise support a means for tuning the low noise amplifier of the first UE during the second automatic gain control symbol and based on the second received signal strength.

In some examples, the slot structure manager930may be configured as or otherwise support a means for selecting the slot structure from a set of multiple available slot structures based on the SCS being above an SCS threshold.

In some examples, the SCS threshold is 30 kilohertz.

Additionally or alternatively, the communications manager920may support wireless communications at a first UE in accordance with examples as disclosed herein. In some examples, the SCS manager925may be configured as or otherwise support a means for receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. In some examples, the slot structure manager930may be configured as or otherwise support a means for receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots. In some examples, the AGC manager935may be configured as or otherwise support a means for performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes the set of multiple automatic gain control symbols.

In some examples, the slot structure further includes a sidelink control channel symbol within a first slot of a set of multiple slots, the sidelink control channel symbol pertaining to the set of multiple slots.

In some examples, the sidelink control channel manager945may be configured as or otherwise support a means for receiving a sidelink control channel message during the sidelink control channel symbol which is between instances of the automatic gain control symbols of the set of multiple automatic gain control symbols in the first slot.

In some examples, the sidelink control channel manager945may be configured as or otherwise support a means for receiving a sidelink control channel message during the sidelink control channel symbol which is after the set of multiple automatic gain control symbols in the first slot.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving the sidelink communications, at least in part, during a second slot of the set of multiple slots, the second slot including a set of multiple symbols, each symbol of the set of multiple symbols including a data symbol.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a first signal during a first automatic gain control symbol of the set of multiple automatic gain control symbols. In some examples, the sidelink reception manager940may be configured as or otherwise support a means for receiving a second signal during a second automatic gain control symbol of the set of multiple automatic gain control symbols, where the first automatic gain control symbol and the second automatic gain control symbol are both of a same receive power as other signals received during other symbols of the slot structure.

In some examples, the sidelink reception manager940may be configured as or otherwise support a means for applying a result of the automatic gain control procedure to the set of multiple slots, where a number of slots of the set of multiple slots is based on a resource pool associated with the sidelink communications.

In some examples, the guard symbol manager960may be configured as or otherwise support a means for receiving the sidelink communications, at least in part, during a temporally last slot of the set of multiple slots, where the temporally last slot includes a guard symbol as a temporally last symbol of the temporally last slot, a respective temporally last symbol of other slots of the set of multiple slots including a data symbol.

In some examples, the received signal strength manager950may be configured as or otherwise support a means for measuring, at a first level of granularity, a first received signal strength during a first automatic gain control symbol of the set of multiple automatic gain control symbols. In some examples, the LNA tuning manager955may be configured as or otherwise support a means for tuning a low noise amplifier of the first UE during the first automatic gain control symbol and based on the first received signal strength. In some examples, the received signal strength manager950may be configured as or otherwise support a means for measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during a second automatic gain control symbol of the set of multiple automatic gain control symbols. In some examples, the LNA tuning manager955may be configured as or otherwise support a means for tuning the low noise amplifier of the first UE during a third automatic gain control symbol of the set of multiple automatic gain control symbols and based on the second received signal strength.

In some examples, the slot structure manager930may be configured as or otherwise support a means for selecting the slot structure from a set of multiple available slot structures based on the SCS being above an SCS threshold.

In some examples, the SCS threshold includes 30 kilohertz.

Additionally or alternatively, the communications manager920may support wireless communications at a second UE in accordance with examples as disclosed herein. In some examples, the SCS manager925may be configured as or otherwise support a means for transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. In some examples, the slot structure manager930may be configured as or otherwise support a means for transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol.

In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a first instance of a first signal during a temporally first symbol of the slot structure. In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a second instance of the first signal during a temporally second symbol of the slot structure, where the temporally first symbol of the slot structure is the first automatic gain control symbol, and where the temporally second symbol of the slot structure is the sidelink control channel symbol.

In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a first instance of a second signal during temporally third symbol of the slot structure. In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a second instance of the second signal during a temporally fourth symbol of the slot structure, where the temporally third symbol of the slot structure is the second automatic gain control symbol.

In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a first instance of a first signal during the first automatic gain control symbol In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a second instance of the first signal during the slot structure. In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a first instance of a second signal during the second automatic gain control symbol. In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a second instance of the second signal during the slot structure.

In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a first signal during the first automatic gain control symbol. In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a second signal during the second automatic gain control symbol, where the first automatic gain control symbol and the second automatic gain control symbol are both of a same transmit power as other signals received during other symbols of the slot structure.

In some examples, the sidelink control channel manager945may be configured as or otherwise support a means for transmitting, in the sidelink control channel symbol, a sidelink control channel signal spanning a resource allocation of a sidelink shared channel associated with the sidelink control channel signal, the sidelink control channel symbol being a temporally second symbol of the slot structure.

In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting, in a temporally fourth symbol of the slot structure and following the second automatic gain control symbol, a second portion of the sidelink control channel signal spanning a portion of the resource allocation.

In son examples, the slot structure manager930may be configured as or otherwise support a means for selecting the slot structure from a set of multiple available slot structures based on the SCS being above an SCS threshold.

In some examples, the SCS threshold is 30 kilohertz.

Additionally or alternatively, the communications manager920may support wireless communications at a second UE in accordance with examples as disclosed herein. In some examples, the SCS manager925may be configured as or otherwise support a means for transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. In some examples, the slot structure manager930may be configured as or otherwise support a means for transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots.

In some examples, the slot structure further includes a sidelink control channel symbol within a first slot of a set of multiple slots, the sidelink control channel symbol pertaining to the set of multiple slots.

In some examples, the sidelink control channel manager945may be configured as or otherwise support a means for transmitting a sidelink control channel message during the sidelink control channel symbol which is between instances of the automatic gain control symbols of the set of multiple automatic gain control symbols in the first slot.

In some examples, the sidelink control channel manager945may be configured as or otherwise support a means for transmitting a sidelink control channel message during the sidelink control channel symbol which is after the set of multiple automatic gain control symbols in the first slot.

In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting the sidelink communications, at least in part, during a second slot of the set of multiple slots, the second slot including a set of multiple symbols, each symbol of the set of multiple symbols including a data symbol.

In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a first signal during a first automatic gain control symbol of the set of multiple automatic gain control symbols. In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting a second signal during a second automatic gain control symbol of the set of multiple automatic gain control symbols, where the first automatic gain control symbol and the second automatic gain control symbol are both of a same receive power as other signals received during other symbols of the slot structure.

In some examples, the sidelink transmission manager965may be configured as or otherwise support a means for transmitting the sidelink communications, at least in part, during a temporally last slot of the set of multiple slots, where the temporally last slot includes a guard symbol as a temporally last symbol of the temporally last slot, a respective temporally last symbol of other slots of the set of multiple slots including a data symbol.

In some examples, the slot structure manager930may be configured as or otherwise support a means for selecting the slot structure from a set of multiple available slot structures based on the SCS being above an SCS threshold.

In some examples, the SCS threshold includes 30 kilohertz.

FIG.10shows a diagram of a system1000including a device1005that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The device1005may be an example of or include the components of a device705, a device805, or a UE115as described herein. The device1005may communicate wirelessly with one or more base stations105, UEs115, or any combination thereof. The device1005may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager1020, an input/output (I/O) controller1010, a transceiver1015, an antenna1025, a memory1030, code1035, and a processor1040. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus1045).

The I/O controller1010may manage input and output signals for the device1005. The I/O controller1010may also manage peripherals not integrated into the device1005. In some cases, the I/O controller1010may represent a physical connection or port to an external peripheral. In some cases, the I/O controller1010may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX, LINUX®, or another known operating system. Additionally or alternatively, the I/O controller1010may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller1010may be implemented as part of a processor, such as the processor1040. In some cases, a user may interact with the device1005via the I/O controller1010or via hardware components controlled by the I/O controller1010.

In some cases, the device1005may include a single antenna1025. However, in some other cases, the device1005may have more than one antenna1025, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver1015may communicate bi-directionally, via the one or more antennas1025, wired, or wireless links as described herein. For example, the transceiver1015may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver1015may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas1025for transmission, and to demodulate packets received from the one or more antennas1025. The transceiver1015, or the transceiver1015and one or more antennas1025, may be an example of a transmitter715, a transmitter815, a receiver710, a receiver810, or any combination thereof or component thereof, as described herein.

The memory1030may include random access memory (RAM) and read-only memory (ROM). The memory1030may store computer-readable, computer-executable code1035including instructions that, when executed by the processor1040, cause the device1005to perform various functions described herein. The code1035may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code1035may not be directly executable by the processor1040but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory1030may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor1040may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor1040may be configured to operate a memory array using a memory controller. In some other cases, an memory controller may be integrated into the processor1040. The processor1040may be configured to execute computer-readable instructions stored in a memory (e.g., the memory1030) to cause the device1005to perform various functions (e.g. functions or tasks supporting slot structure for automatic gain control for high SCS). For example, the device1005or a component of the device1005may include a processor1040and memory1030coupled with or to the processor1040, the processor1040and memory1030configured to perform various functions described herein.

The communications manager1020may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager1020may be configured as or otherwise support a means for receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The communications manager1020may be configured as or otherwise support a means for receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol. The communications manager1020may be configured as or otherwise support a means for performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes at least the first automatic gain control symbol and the second automatic gain control symbol.

Additionally or alternatively, the communications manager1020may support wireless communications at a first UE in accordance with examples as disclosed herein. For example, the communications manager1020may be configured as or otherwise support a means for receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The communications manager1020may be configured as or otherwise support a means for receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots. The communications manager1020may be configured as or otherwise support a means for performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes the set of multiple automatic gain control symbols.

Additionally or alternatively, the communications manager1020may support wireless communications at a second UE in accordance with examples as disclosed herein. For example, the communications manager1020may be configured as or otherwise support a means for transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The communications manager1020may be configured as or otherwise support a means for transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol.

Additionally or alternatively, the communications manager1020may support wireless communications at a second UE in accordance with examples as disclosed herein. For example, the communications manager1020may be configured as or otherwise support a means for transmitting, to a first UE an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The communications manager1020may be configured as or otherwise support a means for transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots.

By including or configuring the communications manager1020in accordance with examples as described herein, the device1005may support techniques for reduced latency, more efficient utilization of communication resources, and improved utilization of processing capability via enabling a UE to perform an AGC process at high SCS.

In some examples, the communications manager1020may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver1015, the one or more antennas1025, or any combination thereof. Although the communications manager1020is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager1020may be supported by or performed by the processor1040, the memory1030, the code1035, or any combination thereof. For example, the code1035may include instructions executable by the processor1040to cause the device1005to perform various aspects of slot structure for automatic gain control for high SCS as described herein, or the processor1040and the memory1030may be otherwise configured to perform or support such operations.

FIG.11shows a flowchart illustrating a method1100that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The operations of the method1100may be implemented by a UE or its components as described herein. For example, the operations of the method1100may be performed by a UE115as described with reference toFIGS.1through10. In some examples, a UE may execute a set of instructions to control the functional elements of the IE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1105, the method may include receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The operations of1105may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1105may be performed by an SCS manager925as described with reference toFIG.9.

At1110, the method may include receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol. The operations of1110may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1110may be performed by a slot structure manager930as described with reference toFIG.9.

At1115, the method may include performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes at least the first automatic gain control symbol and the second automatic gain control symbol. The operations of1115may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1115may be performed by an AGC manager935as described with reference toFIG.9.

FIG.12shows a flowchart illustrating a method1200that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The operations of the method1200may be implemented by a UE or its components as described herein. For example, the operations of the method1200may be performed by a UE115as described with reference toFIGS.1through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1205, the method may include receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs. The operations of1205may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1205may be performed by an SCS manager925as described with reference toFIG.9.

At1210, the method may include receiving the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots. The operations of1210may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1210may be performed by a slot structure manager930as described with reference toFIG.9.

At1215, the method may include performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes the set of multiple automatic gain control symbols. The operations of1215may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1215may be performed by an AGC manager935as described with reference toFIG.9.

FIG.13shows a flowchart illustrating a method1300that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The operations of the method1300may be implemented by a UE or its components as described herein. For example, the operations of the method1300may be performed by a UE115as described with reference toFIGS.1through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1305, the method may include transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE, The operations of1305may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1305may be performed by an SCS manager925as described with reference toFIG.9.

At1310, the method may include transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol. The operations of1310may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1310may be performed by a slot structure manager930as described with reference toFIG.9.

FIG.14shows a flowchart illustrating a method1400that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The operations of the method1400may be implemented by a UE or its components as described herein. For example, the operations of the method1400may be performed by a UE115as described with reference toFIGS.1through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1405, the method may include transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The operations of1405may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1405may be performed by an SCS manager925as described with reference toFIG.9.

At1410, the method may include transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol. The operations of1410may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1410may be performed by a slot structure manager930as described with reference toFIG.9.

At1415, the method may include transmitting a first signal during the first automatic gain control symbol. The operations of1415may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1415may be performed by a sidelink transmission manager965as described with reference toFIG.9.

At1420, the method may include transmitting a second signal during the second automatic gain control symbol, where the first automatic gain control symbol and the second automatic gain control symbol are both of a same transmit power as other signals received during other symbols of the slot structure. The operations of1420may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1420may be performed by a sidelink transmission manager965as described with reference toFIG.9.

FIG.15shows a flowchart illustrating a method1500that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The operations of the method1500may be implemented by a UE or its components as described herein. For example, the operations of the method1500may be performed by a UE115as described with reference toFIGS.1through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1505, the method may include transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The operations of1505may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1505may be performed by an SCS manager925as described with reference toFIG.9.

At1510, the method may include transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots. The operations of1510may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1510may be performed by a slot structure manager930as described with reference toFIG.9.

FIG.16shows a flowchart illustrating a method1600that supports slot structure for automatic gain control for high SCS in accordance with one or more aspects of the present disclosure. The operations of the method1600may be implemented by a UE or its components as described herein. For example, the operations of the method1600may be performed by a UE115as described with reference toFIGS.1through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1605, the method may include transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE. The operations of1605may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1605may be performed by an SCS manager925as described with reference toFIG.9.

At1610, the method may include transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based on the SCS, the slot structure including a set of multiple automatic gain control symbols within a first slot of a set of multiple slots, the set of multiple automatic gain control symbols pertaining to the set of multiple slots. The operations of1610may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1610may be performed by a slot structure manager930as described with reference toFIG.9.

At1615, the method may include transmitting a first signal during a first automatic gain control symbol of the set of multiple automatic gain control symbols. The operations of1615may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1615may be performed by a sidelink transmission manager965as described with reference toFIG.9.

At1620, the method may include transmitting a second signal during a second automatic gain control symbol of the set of multiple automatic gain control symbols, where the first automatic gain control symbol and the second automatic gain control symbol are both of a same receive power as other signals received during other symbols of the slot structure. The operations of1620may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1620may be performed by a sidelink transmission manager965as described with reference toFIG.9.

The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communications at a first UE, comprising: receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs; receiving the sidelink communications in accordance with a slot structure that is based at least in part on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol: and performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes at least the first automatic gain control symbol and the second automatic gain control symbol.

Aspect 2: The method of aspect 1, further comprising: applying, based at least in part on the automatic gain control procedure, an automatic gain control to the sidelink communications that occur over a plurality of slots.

Aspect 3: The method of any of aspects 1 through 2, the receiving the sidelink communications in accordance with the slot structure comprising: receiving a first instance of a first signal during a temporally first symbol of the slot structure; and receiving a second instance of the first signal during a temporally second symbol of the slot structure, wherein the temporally first symbol of the slot structure is the first automatic gain control symbol, and wherein the temporally second symbol of the slot structure is the sidelink control channel symbol.

Aspect 4: The method of aspect 3, the receiving the sidelink communications in accordance with the slot structure further comprising: receiving a first instance of a second signal during a temporally third symbol of the slot structure; and receiving a second instance of the second signal during a temporally fourth symbol of the slot structure, wherein the temporally third symbol of the slot structure is the second automatic gain control symbol.

Aspect 5: The method of any of aspects 1 through 4, the receiving the sidelink communications in accordance with the slot structure comprising: receiving a first instance of a first signal during the first automatic gain control symbol; receiving a second instance of the first signal during the slot structure: receiving a first instance of a second signal during the second automatic gain control symbol; and receiving a second instance of the second signal during the slot structure.

Aspect 6: The method of any of aspects 1 through 5, the receiving the sidelink communications in accordance with the slot structure comprising: receiving a first signal during the first automatic gain control symbol; and receiving a second signal during the second automatic gain control symbol, wherein the first automatic gain control symbol and the second automatic gain control symbol are both of a same receive power as other signals received during other symbols of the slot structure.

Aspect 7: The method of any of aspects 1 through 6, further comprising: receiving, in the sidelink control channel symbol, a sidelink control channel signal spanning a resource allocation of a sidelink shared channel associated with the sidelink control channel signal, the sidelink control channel symbol being a temporally second symbol of the slot structure.

Aspect 8: The method of aspect 7, further comprising: receiving, in a temporally fourth symbol of the slot structure and following the second automatic gain control symbol, a second portion of the sidelink control channel signal spanning a portion of the resource allocation.

Aspect 9: The method of aspect 8, further comprising: demodulating the sidelink control channel signal received in the temporally second symbol and the second portion of the sidelink control channel signal received in the temporally fourth symbol separately.

Aspect 10: The method of any of aspects 1 through 9, the performing the automatic gain control procedure comprising: measuring, at a first level of granularity, a first received signal strength during the first automatic gain control symbol; tuning a low noise amplifier of the first UE during the first automatic gain control symbol and based at least in part on the first received signal strength; measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during the sidelink control channel symbol; and tuning the low noise amplifier of the first UE during the second automatic gain control symbol and based at least in part on the second received signal strength.

Aspect 11: The method of any of aspects 1 through 10, further comprising: selecting the slot structure from a plurality of available slot structures based at least in part on the SCS being above an SCS threshold.

Aspect 12: The method of aspect 11, wherein the SCS threshold is 30 kilohertz.

Aspect 13: A method for wireless communications at a first UE, comprising: receiving an indication of an SCS to be used for sidelink communications between the first UE and one or more second UEs; receiving the sidelink communications in accordance with a slot structure that is based at least in part on the SCS, the slot structure including a plurality of automatic gain control symbols within a first slot of a plurality of slots, the plurality of automatic gain control symbols pertaining to the plurality of slots; and performing an automatic gain control procedure for the sidelink communications during an automatic gain control period that includes the plurality of automatic gain control symbols.

Aspect 14: The method of aspect 13, wherein the slot structure further comprises a sidelink control channel symbol within the first slot of the plurality of slots, the sidelink control channel symbol pertaining to the plurality of slots.

Aspect 15: The method of aspect 14, the receiving the sidelink communications in accordance with the slot structure comprising: receiving a sidelink control channel message during the sidelink control channel symbol which is between instances of the automatic gain control symbols of the plurality of automatic gain control symbols in the first slot.

Aspect 16: The method of any of aspects 14 through 15, the receiving the sidelink communications in accordance with the slot structure comprising: receiving a sidelink control channel message during the sidelink control channel symbol which is after the plurality of automatic gain control symbols in the first slot.

Aspect 17: The method of any of aspects 14 through 16, the receiving the sidelink communications in accordance with the slot structure comprising: receiving the sidelink communications, at least in part, during a second slot of the plurality of slots, the second slot comprising a plurality of symbols, each symbol of the plurality of symbols comprising a data symbol.

Aspect 18: The method of any of aspects 13 through 17, the receiving the sidelink communications in accordance with the slot structure comprising: receiving a first signal during a first automatic gain control symbol of the plurality of automatic gain control symbols; and receiving a second signal during a second automatic gain control symbol of the plurality of automatic gain control symbols, wherein the first automatic gain control symbol and the second automatic gain control symbol are both of a same receive power as other signals received during other symbols of the slot structure.

Aspect 19: The method of any of aspects 13 through 18, further comprising: applying a result of the automatic gain control procedure to the plurality of slots, wherein a number of slots of the plurality of slots is based at least in part on a resource pool associated with the sidelink communications.

Aspect 20: The method of any of aspects 13 through 19, the receiving the sidelink communications in accordance with the slot structure comprising: receiving the sidelink communications, at least in part, during a temporally last slot of the plurality of slots, wherein the temporally last slot includes a guard symbol as a temporally last symbol of the temporally last slot, a respective temporally last symbol of other slots of the plurality of slots comprising a data symbol.

Aspect 21: The method of any of aspects 13 through 20, the performing the automatic gain control comprising: measuring, at a first level of granularity, a first received signal strength during a first automatic gain control symbol of the plurality of automatic gain control symbols; tuning a low noise amplifier of the first UE during the first automatic gain control symbol and based at least in part on the first received signal strength; measuring, at a second level of granularity that is more refined than the first level of granularity, a second received signal strength during a second automatic gain control symbol of the plurality of automatic gain control symbols; and tuning the low noise amplifier of the first UE during a third automatic gain control symbol of the plurality of automatic gain control symbols and based at least in part on the second received signal strength.

Aspect 22: The method of any of aspects 13 through 21, further comprising: selecting the slot structure from a plurality of available slot structures based at least in part on the SCS being above an SCS threshold.

Aspect 23: The method of aspect 22, wherein the SCS threshold comprises 30 kilohertz.

Aspect 24: A method for wireless communications at a second UE, comprising: transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE; and transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based at least in part on the SCS, the slot structure including a first automatic gain control symbol, a second automatic gain control symbol, and a sidelink control channel symbol between the first automatic gain control symbol and the second automatic gain control symbol.

Aspect 25: The method of aspect 24, the transmitting the sidelink communications in accordance with the slot structure comprising: transmitting a first instance of a first signal during a temporally first symbol of the slot structure: and transmitting a second instance of the first signal during a temporally second symbol of the slot structure, wherein the temporally first symbol of the slot structure is the first automatic gain control symbol, and wherein the temporally second symbol of the slot structure is the sidelink control channel symbol.

Aspect 26: The method of aspect 25, the transmitting the sidelink communications in accordance with the slot structure further comprising: transmitting a first instance of a second signal during a temporally third symbol of the slot structure; and transmitting a second instance of the second signal during a temporally fourth symbol of the slot structure, wherein the temporally third symbol of the slot structure is the second automatic gain control symbol.

Aspect 27: The method of any of aspects 24 through 26, the transmitting the sidelink communications in accordance with the slot structure comprising: transmitting a first instance of a first signal during the first automatic gain control symbol; transmitting a second instance of the first signal during the slot structure; transmitting a first instance of a second signal during the second automatic gain control symbol: and transmitting a second instance of the second signal during the slot structure.

Aspect 28: The method of any of aspects 24 through 27, the transmitting the sidelink communications in accordance with the slot structure comprising: transmitting a first signal during the first automatic gain control symbol: and transmitting a second signal during the second automatic gain control symbol, wherein the first automatic gain control symbol and the second automatic gain control symbol are both of a same transmit power as other signals received during other symbols of the slot structure.

Aspect 29: The method of any of aspects 24 through 28, further comprising: transmitting, in the sidelink control channel symbol, a sidelink control channel signal spanning a resource allocation of a sidelink shared channel associated with the sidelink control channel signal, the sidelink control channel symbol being a temporally second symbol of the slot structure.

Aspect 30: The method of aspect 29, further comprising: transmitting, in a temporally fourth symbol of the slot structure and following the second automatic gain control symbol, a second portion of the sidelink control channel signal spanning a portion of the resource allocation.

Aspect 31: The method of any of aspects 24 through 30, further comprising: selecting the slot structure from a plurality of available slot structures based at least in part on the SCS being above an SCS threshold.

Aspect 32: The method of aspect 31, wherein the SCS threshold is 30 kilohertz.

Aspect 33: A method for wireless communications at a second UE, comprising: transmitting, to a first UE, an indication of an SCS to be used for sidelink communications between the first UE and the second UE; and transmitting, to the first UE, the sidelink communications in accordance with a slot structure that is based at least in part on the SCS, the slot structure including a plurality of automatic gain control symbols within a first slot of a plurality of slots, the plurality of automatic gain control symbols pertaining to the plurality of slots.

Aspect 34: The method of aspect 33, wherein the slot structure further comprises a sidelink control channel symbol within the first slot of the plurality of slots, the sidelink control channel symbol pertaining to the plurality of slots.

Aspect 35: The method of aspect 34, the transmitting the sidelink communications in accordance with the slot structure comprising: transmitting a sidelink control channel message during the sidelink control channel symbol which is between instances of the automatic gain control symbols of the plurality of automatic gain control symbols in the first slot.

Aspect 36: The method of any of aspects 34 through 35, the transmitting the sidelink communications in accordance with the slot structure comprising: transmitting a sidelink control channel message during the sidelink control channel symbol which is after the plurality of automatic gain control symbols in the first slot.

Aspect 37: The method of any of aspects 34 through 36, the transmitting the sidelink communications in accordance with the slot structure comprising: transmitting the sidelink communications, at least in part, during a second slot of the plurality of slots, the second slot comprising a plurality of symbols, each symbol of the plurality of symbols comprising a data symbol.

Aspect 38: The method of any of aspects 33 through 37, the transmitting the sidelink communications in accordance with the slot structure comprising: transmitting a first signal during a first automatic gain control symbol of the plurality of automatic gain control symbols; and transmitting a second signal during a second automatic gain control symbol of the plurality of automatic gain control symbols, wherein the first automatic gain control symbol and the second automatic gain control symbol are both of a same receive power as other signals received during other symbols of the slot structure.

Aspect 39: The method of any of aspects 33 through 38, the transmitting the sidelink communications in accordance with the slot structure comprising: transmitting the sidelink communications, at least in part, during a temporally last slot of the plurality of slots, wherein the temporally last slot includes a guard symbol as a temporally last symbol of the temporally last slot, a respective temporally last symbol of other slots of the plurality of slots comprising a data symbol.

Aspect 40: The method of any of aspects 33 through 39, further comprising: selecting the slot structure from a plurality of available slot structures based at least in part on the SCS being above an SCS threshold.

Aspect 41: The method of aspect 40, wherein the SCS threshold comprises 30 kilohertz.

Aspect 42: An apparatus for wireless communications at a first UE, comprising a processor; and memory coupled with the processor; the processor configured to perform a method of any of aspects 1 through 12.

Aspect 43: An apparatus for wireless communications at a first UE, comprising at least one means for performing a method of any of aspects 1 through 12.

Aspect 44: A non-transitory computer-readable medium storing code for wireless communications at a first UE, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 12.

Aspect 45: An apparatus for wireless communications at a first UE, comprising a processor; and memory coupled with the processor; the processor configured to perform a method of any of aspects 13 through 23.

Aspect 46: An apparatus for wireless communications at a first UE, comprising at least one means for performing a method of any of aspects 13 through 23.

Aspect 47: A non-transitory computer-readable medium storing code for wireless communications at a first UE, the code comprising instructions executable by a processor to perform a method of any of aspects 13 through 23.

Aspect 48: An apparatus for wireless communications at a second UE, comprising a processor; and memory coupled with the processor; the processor configured to perform a method of any of aspects 24 through 32.

Aspect 49: An apparatus for wireless communications at a second UE, comprising at least one means for performing a method of any of aspects 24 through 32.

Aspect 50: A non-transitory computer-readable medium storing code for wireless communications at a second UE, the code comprising instructions executable by a processor to perform a method of any of aspects 24 through 32.

Aspect 51: An apparatus for wireless communications at a second UE, comprising a processor; and memory coupled with the processor; the processor configured to perform a method of any of aspects 33 through 41.

Aspect 52: An apparatus for wireless communications at a second UE, comprising at least one means for performing a method of any of aspects 33 through 41.

Aspect 53: A non-transitory computer-readable medium storing code for wireless communications at a second UE, the code comprising instructions executable by a processor to perform a method of any of aspects 33 through 41.

It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.

Although aspects of an LTE, LTE-A, LT E-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.

Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any 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, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wire less technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wire less technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of”) indicates an inclusive list such that, for example, a list of at least one of A. B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C. Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.”

The term “determine” or “determining” encompasses a wide variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure), ascertaining and the like. Also, “determining” can include receiving (such as receiving information), accessing (such as accessing data in a memory) and the like. Also, “determining” can include resolving, selecting, choosing, establishing and other such similar actions.

As used herein, including; in the claims, the term “set” refers to a group of one or more.

In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.

The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration,” and not “preferred” or “advantageous over other examples” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.