Wireless device transmit and receive capabilities in sidelink control information

Abstract

Methods, systems, and devices for wireless communications are described. One or more UEs communicating on a sidelink may indicate transmit and receive categories to other UEs. A first UE may receive an indication of a receive category of a second wireless device in a sidelink communication message. The first UE may then transmit a shared sidelink channel message to the second wireless device based on the receive category of the second wireless device. In another scenario, the first UE may receive an indication of the transmit category of the second wireless device in a sidelink communication message. The first wireless device may then compare the transmit category of the second wireless device with the receive category of the first wireless device. The first wireless device may determine whether to decode the shared sidelink channel message from the second UE based on the comparison.

Description

[0001] Priority claim

[0002] This application claims priority to and the benefit of U.S. non-provisional patent application Ser. No. 16 / 843,804, filed on April 8, 2020, entitled “WIRELESS DEVICE TRANSMIT AND RECEIVE IN CAPABILITY IN SIDELINK CONTROL INFORMATION,” which is hereby incorporated by reference in its entirety. Technical Field

[0003] The following relates generally to wireless communications and, more particularly, to wireless device transmit and receive capabilities in sidelink control information.

[0004] background

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and the like. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may employ various technologies, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting communication with multiple communication devices, which may be further referred to as user equipment (UE).

[0006] One or more UEs may communicate in a wireless communication system using a sidelink channel. Each UE may have a corresponding transmit class indicating the UE's transmit capabilities and a receive class indicating the UE's receive capabilities. However, a UE may not be aware of the transmit or receive classes of other UEs with which it is communicating, which may result in communication interruptions or delays.

[0007] Overview

[0008] The described techniques relate to improved methods, systems, devices, and apparatuses for supporting wireless device transmit and receive capabilities in sidelink control information. Generally speaking, the described techniques provide for one or more user equipment (UE) to communicate on a sidelink and indicate transmit and receive categories to other UEs. In a first scenario, a first UE may receive an indication of a receive category of a second wireless device in a sidelink communication message. The first UE may then transmit a shared sidelink channel message to the second wireless device based on the receive category of the second wireless device. In another scenario, the first UE may receive an indication of the transmit category of the second wireless device in a sidelink communication message. The first wireless device may then compare the transmit category of the second wireless device with the receive category of the first wireless device. The first wireless device may determine whether to decode the shared sidelink channel message from the second UE based on the comparison. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 An example of a wireless communication system supporting wireless device transmit and receive capabilities in sidelink control information in accordance with aspects of the present disclosure is illustrated.

[0011] Figure 2 An example of a wireless communication system supporting wireless device transmit and receive capabilities in sidelink control information in accordance with aspects of the present disclosure is illustrated.

[0012] Figure 3 An example of a process flow is illustrated to support wireless device transmit and receive capabilities in sidelink control information in accordance with aspects of the present disclosure.

[0013] Figure 4 An example of a process flow is illustrated to support wireless device transmit and receive capabilities in sidelink control information in accordance with aspects of the present disclosure.

[0014] Figure 5 and 6 A block diagram of a device supporting wireless device transmission and reception capabilities in sidelink control information is shown in accordance with aspects of the present disclosure.

[0015] Figure 7 A block diagram of a communications manager supporting wireless device transmit and receive capabilities in sidelink control information is shown in accordance with aspects of the present disclosure.

[0016] Figure 8 A diagram of a system including devices supporting wireless device transmission and reception capabilities in sidelink control information is shown in accordance with aspects of the present disclosure.

[0017] Figures 9 to 11 A flow chart illustrating a method of supporting wireless device transmit and receive capabilities in sidelink control information in accordance with aspects of the present disclosure is shown.

[0018] Detailed description

[0019] In some wireless communication systems, two or more devices can communicate via device-to-device communication, such as vehicle-to-vehicle (V2V) or vehicle-to-everything (V2X) communication systems. In a V2X system, a user equipment (UE) can communicate with other UEs on a sidelink channel. The UE can transmit or receive sidelink control information (SCI) in a sidelink channel, such as a physical sidelink control channel (PSCCH). The UE can also transmit or receive sidelink data and signaling information in a sidelink channel, such as a physical sidelink shared channel (PSSCH).

[0020] A UE may have specific transmit and receive capabilities that may determine which types of control and data messages the UE may be able to receive and transmit.

[0021] A UE may transmit sidelink messages to other UEs on a sidelink channel. In some cases, there may be a mismatch between the transmit capabilities of a transmitting UE and the receive capabilities of a receiving UE. In some cases, this mismatch in transmit and receive parameters may prevent the receiving UE from successfully decoding the transmission. In some cases, this mismatch in transmit and receive parameters may cause the receiving UE to expend additional time and computational resources to decode the transmission, even though the UE may not be able to decode the transmission due to the capability mismatch.

[0022] In some cases, sidelink communication may occur when the transmitting UE's transmission capabilities may exceed the receiving capabilities of the receiving UE. In this case, the transmitting UE may transmit messages that the receiving UE may not be able to decode. This may prevent communication between the transmitting UE and the receiving UE. Additionally, the receiving UE may expend resources attempting to decode a transmission that it cannot decode.

[0023] In some cases, sidelink communication may occur when the receiving capability of the receiving UE may equal or exceed the transmitting capability of the transmitting UE. In this case, the receiving UE may decode the message from the transmitting UE. In some cases where the receiving capability of the receiving UE exceeds the transmitting capability of the transmitting UE, the receiving UE may determine a subset of parameters to use for sending a transmission to decode the message. This determination may require iterating over possible transmission parameters or combinations of transmission parameters to decode the message.

[0024] A UE may be configured with a transmission class having parameters indicating a number of transmission capabilities of the UE. The parameters that may be indicated by the transmission class include at least one of the following: a maximum number of sidelink shared channel transport block bits that can be transmitted within a transmission time interval (TTI), a maximum number of bits of a sidelink shared channel transport block that can be transmitted within a TTI, and a maximum number of supported layers for spatial multiplexing in the sidelink transmission class.

[0025] In some cases, a UE may be configured with a reception class that includes parameters indicating a number of parameters related to the UE's reception capabilities. Parameters that may be indicated by the reception class include at least one of the following: a maximum number of sidelink shared channel transport block bits received within a TTI, a maximum number of bits of a sidelink shared channel transport block received within a TTI, and a total number of soft channel bits that can be transmitted in a TTI.

[0026] To improve efficiency in the sidelink communication system, the UE may transmit and indicate (eg, in a broadcast message) the UE's transmit capabilities or receive capabilities, or both.

[0027] A UE may receive an indication of the transmit or receive capabilities of another UE and may determine a transmit or receive strategy based on the capabilities. In one scenario, a UE receiving a sidelink channel message from another UE may use the transmission category from the transmitting UE to determine whether to decode the transmission. For example, the receiving UE may determine that the transmission parameters indicated by the transmit capabilities are less than the receive parameters indicated by the receiving capabilities of the receiving UE. Therefore, the UE may determine to decode the transmission. Alternatively, the receiving UE may determine that the transmission parameters indicated by the transmit capabilities are greater than the receive parameters indicated by the receiving capabilities of the receiving UE. Therefore, the UE may determine not to decode the transmission and may not expend energy and resources attempting to decode the message.

[0028] In other cases, the transmitting UE may use the reception category from the receiving UE to format the transmission to support reception of the transmission by the receiving UE. In examples where the parameter indicating the transmit capabilities of the transmitting UE exceeds the parameter indicating the receive capabilities of the receiving UE, the transmitting UE may modify the transmission to enable the receiving UE to decode based at least in part on the reception category of the receiving UE. For example, the transmitting UE may determine the segmentation, modulation and coding scheme (MCS), and resource block configuration of the transmitted sidelink message that the receiving UE may be able to receive.

[0029] Aspects of the present disclosure are initially described in the context of a wireless communication system. Aspects of the present disclosure are subsequently described in the context of a process flow. Aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow diagrams relating to wireless device transmit and receive capabilities in sidelink control information.

[0030] Figure 1 An example of a wireless communication system 100 that supports wireless device transmission and reception capabilities in sidelink control information in accordance with various aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0031] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100 and may be different forms of devices or devices with different capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base stations 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographic area over which base stations 105 and UEs 115 may support signal communication according to one or more radio access technologies.

[0032] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be different forms of devices or devices with different capabilities. Figure 1 1. The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relays, integrated access and backhaul (IAB) nodes, or other network equipment), such as Figure 1 As shown in .

[0033] Each base station 105 can communicate with the core network 130, with each other, or both. For example, the base stations 105 can interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 can communicate with each other directly (e.g., directly between the base stations 105), indirectly (e.g., via the core network 130), or both directly and indirectly on the backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul links 120 can be or include one or more wireless links.

[0034] One or more of the base stations 105 described herein may include or may be referred to by one of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home Evolved Node B, or other suitable terminology.

[0035] UE 115 may include or 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 "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or 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, UE 115 may 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 communication (MTC) device, etc., which may be implemented in various objects, such as appliances or vehicles, meters, etc.

[0036] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 As shown in .

[0037] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on 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 link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) that operates 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 for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 may 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 duplex (FDD) and time division duplex (TDD) component carriers.

[0038] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by a UE 115. A carrier may operate in a standalone mode in which initial acquisition and connection may be performed by a UE 115 via the carrier, or a carrier may operate in a non-standalone mode in which the connection is anchored using a different carrier (e.g., a different carrier of the same or different radio access technology).

[0039] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry both downlink and uplink communications (e.g., in TDD mode).

[0040] A carrier may be associated with a particular bandwidth of radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)) of a carrier of a particular radio access technology. Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication on a particular carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0041] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using a multicarrier modulation (MCM) technique 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 include one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing 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 code rate of the modulation scheme, or both). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further improve the data rate or data integrity of communications with UE 115.

[0042] One or more parameter designs for a carrier may be supported, where the parameter designs may include subcarrier spacing (Δf) and cyclic prefix. A carrier may be divided into one or more BWPs with the same or different parameter designs. In some examples, a UE 115 may 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 UE 115 may be limited to the one or more active BWPs.

[0043] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, which can be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the maximum supported subcarrier spacing, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0044] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time 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 time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of code element periods (e.g., depending on the length of the cyclic prefix added before each code element period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-time slots containing one or more code elements. Excluding the cyclic prefix, each code element period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating band.

[0045] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and 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 communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0046] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for physical control channels may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of UEs 115 may monitor or search the control region for control information according to one or more search space sets, and each search space set may include one or more 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 the 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. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0047] Each base station 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with a base station 105 (e.g., on a carrier) and may be associated with an identifier (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other) used to distinguish between adjacent cells. In some examples, a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) on which the logical communication entity operates. The scope of such a cell may range from a smaller area (e.g., a structure, a subset of structures) to a larger area depending on various factors (such as the capabilities of the base station 105). For example, a cell may be or include a building, a subset of buildings, or an external space between or overlapping geographic coverage areas 110, among other examples.

[0048] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs 115 that have a service subscription with a network provider that supports the macro cell. A small cell may be associated with a lower power base station 105 (compared to a macro cell), and the small cell may operate in the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. A small cell may provide unrestricted access to UEs 115 that have a service subscription with the network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 associated with users in a home or office). A base station 105 may support one or more cells and may also support communications over one or more cells using one or more component carriers.

[0049] 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 to different types of devices.

[0050] In some examples, base stations 105 can be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but the different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0051] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations 105 may have similar frame timing, and transmissions from different base stations 105 may be approximately aligned in time. For asynchronous operation, the base stations 105 may have different frame timing, and transmissions from different base stations 105 may not be aligned in time in some examples. The techniques described herein may be used for either synchronous or asynchronous operation.

[0052] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that incorporate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents it to a person interacting with the application. Some UEs 115 may be designed to collect information or implement 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, wilderness survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0053] Some UEs 115 may be configured to employ a reduced power consumption mode of operation, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power saving techniques for UEs 115 include entering a power-saving deep sleep mode when not engaged in active communication, operating over a limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside a carrier.

[0054] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. The UE 115 can be designed to support ultra-reliable, low-latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication and can be supported by one or more mission-critical services such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency can be used interchangeably herein.

[0055] In some examples, UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some examples, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving base station 105.

[0056] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, the vehicles in the V2X system can use vehicle-to-network (V2N) communication to communicate with roadside infrastructure (such as roadside units), with the network, or with both, via one or more network nodes (e.g., base station 105).

[0057] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) that routes packets or interconnects to external networks. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be delivered through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0058] Some network devices (such as base stations 105) may include subcomponents, such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., base station 105).

[0059] The wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally speaking, the 300 MHz to 3 GHz region is referred to as the ultra-high frequency (UHF) region or the decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can penetrate various structures sufficiently for macrocells to provide service to UEs 115 located indoors. Transmissions using UHF waves can be associated with smaller antennas and a shorter range (e.g., less than 100 kilometers) compared to transmissions using the lower frequencies and longer wavelengths in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0060] The wireless communication system 100 may also operate in a super high frequency (SHF) region using a frequency band from 3 GHz to 30 GHz (also known as a centimeter band) or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also known as a millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be smaller and more closely spaced than the UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and a shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0061] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ licensed 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 an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) may employ carrier sensing for conflict detection and avoidance. In some examples, operations in the unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in the licensed band. Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0062] The base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can 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, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having several rows and columns of antenna ports that the base station 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0063] The base station 105 or the UE 115 can use MIMO communication to exploit multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such a technique may be referred to as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different antenna combinations. Similarly, a receiving device may receive multiple signals via different antennas or different antenna combinations. 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 for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0064] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., base station 105, UE 115) 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 can be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements can include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element can be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0065] The base station 105 or the UE 115 may use beam sweeping techniques as part of a beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions. For example, the base station 105 may transmit signals according to different sets of beamforming weights associated with different transmission directions. The transmissions in different beam directions may be used (e.g., by a transmitting device (such as the base station 105) or a receiving device (such as the UE 115)) to identify a beam direction for later transmission or reception by the base station 105.

[0066] Some signals, such as data signals associated with a particular recipient device, may be transmitted by base station 105 in a single beam direction, e.g., a direction associated with a recipient device, such as UE 115. In some examples, a beam direction associated with transmissions along a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0067] In some examples, transmission by a device (e.g., by a base station 105 or a UE 115) 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 the base station 105 to the UE 115). The UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. The base station 105 may transmit reference signals that may be precoded or unprecoded (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)). The UE 115 may 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 by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0068] A receiving device (e.g., UE 115) may attempt multiple receive configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiving device may attempt multiple receive directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array (e.g., different directional listening weight sets), or 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, the receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving data signals). The single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0069] The wireless communication system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer can be IP-based. The radio link control (RLC) layer can perform packet segmentation and reassembly to communicate on the logical channel. The media access control (MAC) layer can perform priority handling and multiplex the logical channel into the transport channel. The MAC layer can also use error detection technology, error correction technology, or both to support retransmission of the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer can provide the establishment, configuration and maintenance of the RRC connection of the radio bearer that supports user plane data between the UE 115 and the base station 105 or the core network 130. In the physical layer, the transport channel can be mapped to the physical channel.

[0070] UE 115 and base station 105 may support retransmission of data to increase the likelihood that the data is successfully received. Hybrid Automatic Repeat Request (HARQ) feedback is a technique for increasing the likelihood that data is correctly received on communication link 125. 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 MAC layer throughput in poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, a device may support simultaneous slot HARQ feedback, wherein the device may provide HARQ feedback in a particular time slot for data received in a previous symbol in that time slot. In other cases, the device may provide HARQ feedback in a subsequent time slot or based on some other time interval.

[0071] In some examples, a UE 115 may participate in device-to-device communications with one or more other UEs 115. A first UE 115 may broadcast an indication of the transmit and receive capabilities of the first UE 115 as a transmit and receive class. This indication may be communicated in an SCI communication between the UEs 115. A second UE 115 may also broadcast an indication of the transmit and receive capabilities of the second UE 115 as a transmit and receive class as part of the SCI. In a first scenario, the first UE 115 may use the receive class of the second UE 115 to determine how to format a transmission to the second UE 115 so that the second UE 115 can decode the transmission. In another scenario, the first UE may use the transmit class of the second UE 115 to determine whether to decode a transmission from the second UE 115. For example, the second UE may determine that the transmit class of the first UE 115 indicates a transmit capability that is greater than the receive capability of the first UE 115 (e.g., based on the receive class of the first UE 115). For example, first UE 115 may determine that a second UE may transmit more transport block bits in a sidelink channel than the first UE can receive in a TTI. Accordingly, first UE 115 may determine not to decode the transmission from the second UE.

[0072] Figure 2 An example of a wireless communication system 200 that supports wireless device transmission and reception capabilities in sidelink control information according to aspects of the present disclosure is illustrated. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. The wireless communication system 200 can include UE 115-a, UE 115-b, and UE 115-c, which can be as described with reference to FIG. Figure 1 The example described corresponds to UE 115.

[0073] UE 115-a may communicate with one or more other UEs (such as UE 115-b or UE 115-c or both) on a sidelink channel. UE 115-a may communicate based on a transmit class and a receive class. The transmit class may indicate a set of transmit capabilities including at least one of the following: a maximum number of sidelink shared channel transport block bits that may be transmitted within a TTI, a maximum number of bits of a sidelink shared channel transport block that may be transmitted within a TTI, and a maximum number of supported layers for spatial multiplexing transmission in the sidelink transmit class. The receive class may indicate a set of receive capabilities including at least one of the following: a maximum number of sidelink shared channel transport block bits that may be received within a TTI, a maximum number of bits of a sidelink shared channel transport block that may be received within a TTI, and a total number of soft channel bits that may be received within a TTI.

[0074] UE 115-a may broadcast a transmit class indication 205, a receive class indication 210, or both of UE 115-a for use by UE 115-b and UE 115-c in the sidelink communication system. Transmit class indication 205 and receive class indication 210 may be transmitted as part of the SCI. The SCI may be transmitted in the PSCCH. The transmit class and receive class may be information bits added to the SCI.

[0075] Other information may also be inferred by a UE 115 based on the transmit class or receive class of another UE 115. Further, the class of a UE 115 may be updated by control information from the network. For example, a UE 115 communicating in a non-V2X system may have a class indicating different communication parameters for non-V2X communication, or may be configured to have different classes for non-V2X communication. The transmit or receive class of a UE 115 may also vary or indicate different parameters based on the radio access technology (RAT) (e.g., LTE or NR) according to which the UE 115 may be configured to operate. This may be an example of a variable transmit class or receive class.

[0076] In some examples, the number of information bits used to convey the transmit class indication 205 and the receive class indication 210 can correspond to the number of possible transmit classes and receive classes. For example, there may be five possible transmit classes, and three information bits (e.g., representing five different numbers based on the number of binary bits) may be used to convey the transmit class indication 205. In another example, there may be four possible receive classes, and two information bits (e.g., representing four numbers based on the number of binary bits) may be used to convey the receive class indication 210. In examples where three bits may be used to convey the transmit class indication 205 and two bits may be used to convey the receive class indication 210, a total of five bits may be added to the SCI to indicate the transmit and receive capabilities of the UE 115. In other examples, different information bits may be added to the SCI to indicate the transmit class indication 205 and the receive class indication 210 based on the number of possible transmit and receive classes.

[0077] UE 115-b may also broadcast a transmit class indication 205, a reception class indication 210, or both of UE 115-b for use by UE 115-a and UE 115-c. Transmit class indication 205 and reception class indication 210 may be transmitted as part of the SCI. The SCI may be transmitted in the PSCCH. The transmit class and reception class may be information bits added to the SCI.

[0078] UE 115-a and UE 115-b may also be able to receive and use a transmit class indication 205 and a receive class indication 210 sent from another UE 115. UE 115-a and UE 115-b may be able to modify transmission or signal decoding methods based at least in part on the transmit class indication 205 or the receive class indication 210 for the other device in the sidelink communication.

[0079] In some examples, UE 115-a may transmit a message to UE 115-b via sidelink communication. Prior to the transmission, UE 115-a may broadcast an SCI in a PSCCH that includes a transmit class indication 205 and a receive class indication 210 for UE 115-a. UE 115-b may also broadcast an SCI in a PSCCH that includes a transmit class indication 205 and a receive class indication 210 for UE 115-b. UE 115-a may receive the transmit class indication 205 and the receive class indication 210 from UE 115-b, and UE 115-b may receive the transmit class indication 202 and the receive class indication 210 from UE 115-a.

[0080] In some examples, the sidelink transmission category can correspond to the physical transmission capabilities of UE 115, as shown in Table 1.

[0081]

[0082] Table 1

[0083] These illustrate example categories and corresponding transmission bits and numbers of layers, but other categories may have different corresponding capabilities, or the categories shown herein may have different corresponding capabilities in different situations.

[0084] In some examples, the sidelink reception category may correspond to the physical transmission capability of the UE, as shown in Table 2.

[0085]

[0086] Table 2

[0087] These illustrate example categories and corresponding transmission bits and soft channel bits, but other categories may have different corresponding capabilities, or the categories shown herein may have different corresponding capabilities in different situations.

[0088] In some cases, UE 115-a may determine whether a parameter identifying the receive capabilities of UE 115-b is less than, greater than, or equal to a parameter identifying the transmit capabilities of UE 115-a by comparing the transmit class indication 205 of UE 115-a with the receive class indication 210 of UE 115-b. Based on this determination, UE 115-a may format the PSSCH transmission to be compatible with the receive capabilities of UE 115-b.

[0089] For example, as defined in Tables 1 and 2, UE 115-a may be of transmit category 4 and UE 115-b may be of receive category 2. UE 115-a may initiate communication with UE 115-b on a sidelink channel. For UE 115-a, transmission parameters for a maximum number of sidelink shared channel transport block bits that may be transmitted within a TTI and a maximum number of bits of a sidelink shared channel transport block that may be transmitted within a TTI both exceed associated reception parameters for a maximum number of sidelink shared channel transport block bits that may be received within a TTI and a maximum number of bits of a sidelink shared channel transport block that may be received within a TTI for UE 115-b. Based on determining that the receive capability parameter indicated by the receive category indication 210 of UE 115-b is less than the transmit capability parameter indicated by the transmit category indication 205 of UE 115-a, UE 115-a may modify the PSSCH transmission to be compatible with the receive capability of UE 115-b. UE 115a- may modify the segmentation type MCS, or the resource block configuration, or a combination of these configurations so that UE 115-b may be able to decode the PSSCH transmission. UE 115-b may therefore improve communication efficiency.

[0090] In some examples, the ability of the receiving UE 115 to decode the message may correspond to the reception class of the receiving UE 115 and the transmission class of the transmitting UE 115, as shown in Table 3.

[0091] UE reception category Ability to decode transport classes 1 1 2 1、2 3 1, 2, 3, and 4 4 1, 2, 3, 4, and 5

[0092] Table 3

[0093] In some cases, UE 115-b may determine that the transmit capability of UE 115-a is less than the receive capability of UE 115-b by comparing the transmit class indication 205 of UE 115-a with the receive class indication 210 of UE 115-b, as shown in Table 3. Based on this determination, UE 115-b may use the transmit class indication 205 from UE 115-a for notification of decoding of the PSSCH transmitted from UE 115-a.

[0094] For example, as defined in Tables 1 and 2, UE 115-a may be of transmit category 2 and UE 115-b may be of receive category 3. UE 115-a may initiate communication with UE 115-b on a sidelink channel. For UE 115-a, transmission parameters for a maximum number of sidelink shared channel transport block bits that may be transmitted within a TTI and a maximum number of bits of a sidelink shared channel transport block that may be transmitted within a TTI are less than associated reception parameters for a maximum number of sidelink shared channel transport block bits that may be received within a TTI and a maximum number of bits of a sidelink shared channel transport block that may be received within a TTI for UE 115-b. Based on determining that the receive capability parameter indicated by the receive category indication 210 of UE 115-b exceeds the transmit capability parameter of UE 115-a, UE 115-a may transmit a PSSCH transmission to UE 115-b without modification to ensure compatibility with the receive capabilities of UE 115-b. UE 115 - b may decode the PSSCH transmission from UE 115 - a using the transmission class indication 205 of UE 115 - a that informs the decoding method.

[0095] As a result, UE 115-b may be able to decode the PSSCH transmission, which may also improve other aspects of communication reliability. For example, the decoded message may affect other communication mechanisms, such as Reference Signal Received Power (RSRP) exclusion and Code Rate (CR) limiting (e.g., based on the priority of the received message). RSRP exclusion may include UE 115 measuring the signal power from a particular sector or direction (e.g., based on decoding the message from that sector or direction) while also excluding noise and directions from other sectors or directions. Therefore, in the event that UE 115-b is unable to decode the message, UE 115-b will not be able to use the message for system-level mechanisms (such as RSRP exclusion and CR limiting).

[0096] In another example, UE 115-a may be in transmit category 4, while UE 115-b may be in receive category 3. For UE 115-a, the transmission parameters for the maximum number of sidelink shared channel transport block bits that may be transmitted within a TTI and the maximum number of bits of a sidelink shared channel transport block that may be transmitted within a TTI both exceed the associated receive parameters for the maximum number of sidelink shared channel transport block bits that may be received within a TTI and the maximum number of bits of a sidelink shared channel transport block that may be received within a TTI for UE 115-b. Based on determining that the receive capability parameter indicated by the receive category indication 210 of UE 115-b is less than one or more transmit capability parameters of UE 115-a, UE 115-b may receive a PSSCH transmission from UE 115-a. UE 115-b may determine to refrain from decoding the PSSCH transmission from UE 115-a. Consequently, UE 115-b may conserve energy and improve communication efficiency.

[0097] Figure 3 An example of a process flow 300 for supporting wireless device transmit and receive capabilities in sidelink control information according to aspects of the present disclosure is illustrated. In some examples, the process flow 300 can implement aspects of the wireless communication system 100. Figure 1 and 2 As depicted, UE 115-d and UE 115-e may be examples of UE 115. Process flow 300 illustrates an example of a process by which UE 115-d may transmit a message to UE 115-e via sidelink communication.

[0098] At 305, UE 115-d may receive an indication of a reception category for UE 115-e in a sidelink communication message. The reception category may indicate one or more reception parameters of UE 115-e. In some examples, the reception parameter may be the number of bits that UE 115-d is capable of receiving within a TTI, where the number of bits is the number of sidelink shared channel transport block bits or the number of bits of a sidelink shared channel transport block. In some examples, the reception parameter may be the number of supported soft channel bits. In some examples, the reception category may be transmitted by UE 115-e in a PSCCH. In some examples, the reception category may be transmitted by UE 115-e in an SCI message. In some examples, the sidelink communication message may be a broadcast message.

[0099] In some cases, at 310, UE 115-d may determine a segmentation, MCS, and resource block configuration to be used for transmitting a message to UE 115-e based at least in part on the reception category of UE 115-e. In some examples, a segmentation, MCS, and resource block configuration may be determined that does not exceed reception parameters indicated by the reception category of the second wireless device. In some examples, the segmentation, MCS, and resource block configuration may be determined based on an algorithm, where the algorithm is based on the reception category of UE 115-e. The algorithm may be based on a calculation of throughput or latency, such that the segmentation, MCS, and resource block configuration are selected to increase throughput, reduce latency, or both.

[0100] In some cases, at 315 , UE 115 - d may generate a shared sidelink channel message based on the segmentation, MCS, and resource block configuration determined at 310 .

[0101] At 320, UE 115-d may transmit a shared sidelink channel message to UE 115-e based at least in part on the reception category of UE 115-e. In some cases, UE 115-d may transmit the shared sidelink channel message generated at 315. UE 115-d may transmit the shared sidelink channel message based on the determined segmentation, MCS, and resource block configuration.

[0102] Figure 4 An example of a process flow 400 for supporting wireless device transmit and receive capabilities in sidelink control information according to aspects of the present disclosure is illustrated. In some examples, the process flow 400 may implement aspects of the wireless communication system 100. The UE 115-f and the UE 115-g may be as described with reference to FIG. Figure 1 and 2 An example of a described UE 115. Process flow 400 illustrates an example of a process by which UE 115-g may receive a message from UE 115-f via sidelink communication.

[0103] At 405, UE 115-g may receive an indication of the transmit class of UE 115-f in a sidelink communication message.

[0104] The transmission class received by UE 115-g may indicate one or more transmission parameters for UE 115-f. In some examples, the transmission parameter may be the number of bits that the first wireless device can transmit within a TTI. In some examples, the number of bits that the first wireless device can transmit within a TTI is the number of transport block bits. In some examples, the number of bits that the first wireless device can transmit within a TTI may be the number of sidelink shared channel transport block bits that the second wireless device can transmit within a transmission time interval, or the number of sidelink shared channel transport block bits that the second wireless device can transmit within a TTI. In some examples, the transmission parameter may be the number of layers supported for spatial multiplexing by UE 115-f. In some examples, the transmission class may be transmitted by UE 115-f in a PSCCH. In some examples, the transmission class may be transmitted by UE 115-f in an SCI message.

[0105] At 410, UE 115-g may determine, based on the indication of the transmit class of UE 115-f, whether a transmit parameter of UE 115-f is greater than a corresponding receive parameter of UE 115-g, where the receive parameter is based at least in part on the receive class of UE 115-g. In some cases, UE 115-g may determine that the transmit parameter of UE 115-f is greater than the corresponding receive parameter of UE 115-g. In some cases, UE 115-f may determine that the transmit parameter of UE 115-f is less than or equal to the receive parameter of UE 115-g.

[0106] The reception category of UE 115-g may indicate one or more reception parameters of UE 115-g. In some examples, the reception parameter may be the number of bits that UE 115-g is capable of receiving within a TTI. In some examples, the number of bits that UE 115-g is capable of receiving within a TTI may be the number of transport block bits. In some examples, the number of bits that UE 115-g is capable of receiving within a TTI may be the number of sidelink shared channel transport block bits that the first wireless device is capable of receiving within a TTI, or the number of bits of a sidelink shared channel transport block that the first wireless device is capable of receiving within a TTI. In some examples, the reception parameter may be the number of supported soft channel bits. In some examples, the reception parameter may be the number of supported layers for spatial multiplexing by UE 115-g.

[0107] At 415 , UE 115 - g may receive a shared sidelink channel message from UE 115 - f .

[0108] At 420, UE 115-g may determine whether to decode the shared sidelink channel message transmitted from UE 115-f based on the determination at 410. In some cases, UE 115-g may determine to refrain from decoding the shared sidelink channel message from UE 115-f based at least in part on a determination that one or more transmit parameters of UE 115-f are greater than corresponding one or more receive parameters of UE 115-g. In some cases, UE 115-g may determine to decode the shared sidelink channel message based at least in part on a determination that one or more transmit parameters of UE 115-f are less than or equal to corresponding one or more receive parameters of UE 115-g.

[0109] In some examples, UE 115-g may determine to decode a shared sidelink channel message from UE 115-f based at least in part on the number of sidelink shared channel transport block bits that UE 115-g is able to receive within a TTI and the number of bits of the sidelink shared channel transport block that UE 115-g is able to receive within a TTI.

[0110] Figure 5 A block diagram 500 of a device 505 supporting wireless device transmission and reception capabilities in sidelink control information according to aspects of the present disclosure is shown. The device 505 can be an example of aspects of the UE 115 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 520. The device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0111] The receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to wireless device transmit and receive capabilities in sidelink control information, etc.). The information may be passed to other components of the device 505. The receiver 510 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The receiver 510 may utilize a single antenna or a collection of antennas.

[0112] The communication manager 515 may receive an indication of a reception category for a second wireless device in a sidelink communication message, the reception category indicating a reception parameter of the second wireless device; and transmit a shared sidelink channel message to the second wireless device based on the reception category of the second wireless device. The communication manager 515 may also receive an indication of a transmission category for the second wireless device in a sidelink communication message, the transmission category indicating a transmission parameter of the second wireless device; determine, based on the indication, that the transmission parameter of the second wireless device is greater than a reception parameter of the first wireless device, wherein the reception parameter is based on the reception category of the first wireless device; receive the shared sidelink channel message; and determine, based on the determination that the transmission parameter of the second wireless device is greater than the reception parameter of the first wireless device, to refrain from decoding the shared sidelink channel message. The communication manager 515 may also receive an indication of a transmission category for the second wireless device in a sidelink communication message, the transmission category indicating a transmission parameter of the second wireless device; determine, based on the indication, that the transmission parameter of the second wireless device is less than or equal to the reception parameter of the first wireless device, wherein the reception parameter is based on the reception category of the first wireless device; receive the shared sidelink channel message; and determine, based on the determination that the transmission parameter of the second wireless device is less than or equal to the reception parameter of the first wireless device, to decode the shared sidelink channel message. Communications manager 515 may be an example of aspects of communications manager 810 described herein.

[0113] The communication manager 515 or its subcomponents may be implemented in hardware, in code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 515 or its subcomponents may be performed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0114] The communication manager 515 or its subcomponents can be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 515 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 515 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0115] The transmitter 520 may transmit signals generated by other components of the device 505. In some examples, the transmitter 520 may be co-located with the receiver 510 in a transceiver module. For example, the transmitter 520 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The transmitter 520 may utilize a single antenna or a collection of antennas.

[0116] In some examples, the communication manager 515 described herein can be implemented as a chipset for a wireless modem, while the receiver 510 and transmitter 520 can be implemented as a collection of analog components (e.g., amplifiers, filters, phase shifters, antennas, etc.) The wireless modem can obtain and decode a signal from the receiver 510 over a receive interface and can output a signal for transmission to the transmitter 520 over a transmit interface.

[0117] The actions performed by the communication manager 515 as described herein can be implemented to achieve one or more potential advantages. One implementation can allow a UE 115 to save power and increase battery life by avoiding attempting to decode messages that the UE 115 does not have the ability to decode. Another implementation can allow a UE 115 to improve communication reliability by transmitting messages that the UE 115 has determined that other UEs 115 are capable of decoding.

[0118] Figure 6 A block diagram 600 of a device 605 supporting wireless device transmission and reception capabilities in sidelink control information according to aspects of the present disclosure is shown. The device 605 can be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 645. The device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0119] The receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to wireless device transmit and receive capabilities in sidelink control information, etc.). The information may be passed to other components of the device 605. The receiver 610 may be a reference Figure 8 Examples of aspects of the described transceiver 820. The receiver 610 may utilize a single antenna or a collection of antennas.

[0120] Communications manager 615 may be an example of aspects of communications manager 515 as described herein. Communications manager 615 may include a sidelink reception component 620, a sidelink transmission component 625, a parameter determination component 630, a sidelink channel reception component 635, and a decoding component 640. Communications manager 615 may be an example of aspects of communications manager 810 as described herein.

[0121] Sidelink receiving component 620 may receive an indication of a reception category for the second wireless device in the sidelink communication message, the reception category indicating reception parameters for the second wireless device.

[0122] The sidelink transmitting component 625 can transmit a shared sidelink channel message to the second wireless device based on the reception category of the second wireless device.

[0123] Sidelink receiving component 620 may receive an indication of a transmission class for the second wireless device in a sidelink communication message, the transmission class indicating transmission parameters for the second wireless device.

[0124] Parameter determining component 630 can determine, based on the indication, that a transmit parameter of the second wireless device is greater than a receive parameter of the first wireless device, wherein the receive parameter is based on a reception category of the first wireless device.

[0125] The side link channel receiving component 635 can receive shared side link channel messages.

[0126] The decoding component 640 can determine to refrain from decoding the shared side link channel message based on determining that the transmit parameter of the second wireless device is greater than the receive parameter of the first wireless device.

[0127] Sidelink receiving component 620 may receive an indication of a transmission class for the second wireless device in a sidelink communication message, the transmission class indicating transmission parameters for the second wireless device.

[0128] Parameter determining component 630 can determine, based on the indication, that a transmit parameter of the second wireless device is less than or equal to a receive parameter of the first wireless device, wherein the receive parameter is based on a reception category of the first wireless device.

[0129] The side link channel receiving component 635 can receive shared side link channel messages.

[0130] The decoding component 640 can determine to decode the shared side link channel message based on determining that the transmit parameter of the second wireless device is less than or equal to the receive parameter of the first wireless device.

[0131] The transmitter 645 can transmit signals generated by other components of the device 605. In some examples, the transmitter 645 can be co-located with the receiver 610 in a transceiver module. For example, the transmitter 645 can be a reference Figure 8 Examples of aspects of the described transceiver 820. The transmitter 645 may utilize a single antenna or a collection of antennas.

[0132] The processor of UE 115 (eg, controlling receiver 610, transmitter 650, or as described in reference Figure 8 The transceiver 820 described herein can operate the various components described herein to achieve one or more potential advantages. For example, the processor of UE 115 can operate the receiver 610 to receive the transmission class of another UE 115 and receive a sidelink message from the other UE 115. The processor of UE 115 can operate the various components to determine whether to decode the sidelink message. In another example, the processor of UE 115 can operate the transmitter 650 to transmit a transmission class or a reception class to one or more other UEs 115. The other UE 115 can use the reception class to determine the transmission configuration of the sidelink message to the other UE 115. Thus, UE 115 can save power and improve communication reliability by transmitting messages that other UE 115 is determined to be able to decode, or by determining not to attempt to decode a message that UE 115 does not have the ability to decode.

[0133] Figure 7 A block diagram 700 of a communication manager 705 supporting wireless device transmit and receive capabilities in sidelink control information in accordance with aspects of the present disclosure is shown. The communication manager 705 can be an example of aspects of the communication manager 515, the communication manager 615, or the communication manager 810 described herein. The communication manager 705 can include a sidelink receive component 710, a sidelink transmit component 715, a configuration determination component 720, a parameter determination component 725, a sidelink channel receive component 730, and a decoding component 735. Each of these modules can communicate directly or indirectly with each other (e.g., via one or more buses).

[0134] Sidelink receiving component 710 may receive an indication of a reception category for a second wireless device in a sidelink communication message, the reception category indicating reception parameters for the second wireless device.

[0135] In some examples, sidelink receiving component 710 may receive an indication of a transmission class for the second wireless device in a sidelink communication message, the transmission class indicating transmission parameters for the second wireless device.

[0136] In some examples, sidelink receiving component 710 may receive an indication of a transmission class for the second wireless device in a sidelink communication message, the transmission class indicating transmission parameters for the second wireless device.

[0137] In some cases, the sidelink communication messages include physical sidelink control channel messages.

[0138] In some cases, the sidelink communication message includes a sidelink control information message.

[0139] In some cases, the reception parameter is a number of bits that the second wireless device can receive in a transmission time interval, where the number of bits is a number of sidelink shared channel transport block bits or a number of bits of a sidelink shared channel transport block.

[0140] In some cases, the reception parameters include the number of supported soft channel bits.

[0141] In some cases, the sidelink communication messages include physical sidelink control channel messages.

[0142] In some cases, the sidelink communication message includes a sidelink control information message.

[0143] In some cases, the transmission parameter is a number of bits that the first wireless device can transmit within a transmission time interval.

[0144] In some cases, the number of bits is the number of transport block bits.

[0145] In some cases, the number of bits that the second wireless device is capable of transmitting within the transmission time interval includes the number of sidelink shared channel transport block bits that the second wireless device is capable of transmitting within the transmission time interval, or the number of bits of the sidelink shared channel transport block that the second wireless device is capable of transmitting within the transmission time interval.

[0146] In some cases, the sidelink communication message comprises a broadcast message.

[0147] The sidelink transmitting component 715 can transmit a shared sidelink channel message to the second wireless device based on the reception category of the second wireless device.

[0148] In some examples, sidelink transmission component 715 can transmit a shared sidelink channel message based on the determined segmentation, MCS, and resource block configuration.

[0149] In some cases, the transmission class indicates a variable transmission class based on a communication configuration.

[0150] In some cases, the sidelink communication message comprises a broadcast message.

[0151] Parameter determining component 725 can determine, based on the indication, that a transmit parameter of the second wireless device is greater than a receive parameter of the first wireless device, wherein the receive parameter is based on a reception category of the first wireless device.

[0152] In some examples, parameter determining component 725 can determine, based on the indication, that a transmit parameter of the second wireless device is less than or equal to a receive parameter of the first wireless device, where the receive parameter is based on a reception category of the first wireless device.

[0153] In some cases, the reception parameter is a number of bits that the second wireless device is able to receive within a transmission time interval.

[0154] In some cases, the number of bits is the number of transport block bits.

[0155] In some cases, the number of bits that the first wireless device is capable of receiving within the transmission time interval includes the number of sidelink shared channel transport block bits that the first wireless device is capable of receiving within the transmission time interval, or the number of bits of the sidelink shared channel transport block that the first wireless device is capable of receiving within the transmission time interval.

[0156] In some cases, the reception parameters include the number of supported soft channel bits.

[0157] In some cases, the transmission parameters include a number of supported layers for spatial multiplexing by the second wireless device.

[0158] In some cases, the reception parameter is a number of bits that the first wireless device is able to receive within a transmission time interval.

[0159] In some cases, the number of bits is the number of transport block bits.

[0160] In some cases, the number of bits that the first wireless device is capable of receiving within the transmission time interval includes the number of sidelink shared channel transport block bits that the first wireless device is capable of receiving within the transmission time interval, or the number of bits of the sidelink shared channel transport block that the first wireless device is capable of receiving within the transmission time interval.

[0161] In some cases, the transmission parameter is a number of bits that the second wireless device can transmit within a transmission time interval.

[0162] In some cases, the number of bits that the second wireless device is capable of transmitting within the transmission time interval includes the number of sidelink shared channel transport block bits that the second wireless device is capable of transmitting within the transmission time interval, or the number of bits of the sidelink shared channel transport block that the second wireless device is capable of transmitting within the transmission time interval.

[0163] Side link channel receiving component 730 can receive shared side link channel messages.

[0164] In some examples, side link channel receiving component 730 can receive a shared side link channel message.

[0165] The decoding component 735 can determine to refrain from decoding the shared side link channel message based on determining that the transmit parameter of the second wireless device is greater than the receive parameter of the first wireless device.

[0166] In some examples, decoding component 735 may determine to decode the shared side link channel message based on determining that a transmit parameter of the second wireless device is less than or equal to a receive parameter of the first wireless device.

[0167] In some examples, the decoding component 735 may determine to decode a shared side link channel message based on the number of side link shared channel transport block bits that the first wireless device is able to receive within the transmission time interval and the number of bits of the side link shared channel transport block that the first wireless device is able to receive within the transmission time interval.

[0168] In some examples, decoding component 735 can perform a reference signal power exclusion process or determine a rate limit, or a combination thereof based on the decoding.

[0169] Configuration determining component 720 can determine segmentation, MCS, and resource block configuration based on the reception category of the second wireless device.

[0170] In some examples, configuration determining component 720 can determine an MCS and resource block configuration that does not exceed a reception category of the second wireless device.

[0171] In some examples, configuration determining component 720 can determine segmentation, MCS, and resource block configuration based on an algorithm, where the algorithm is based on throughput calculations, latency calculations, or a combination thereof.

[0172] Figure 8 A diagram of a system 800 including a device 805 that supports wireless device transmit and receive capabilities in sidelink control information in accordance with various aspects of the present disclosure is shown. The device 805 can be an example of, or include components of, a device 505, a device 605, or a UE 115 as described herein. The device 805 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 810, an I / O controller 815, a transceiver 820, an antenna 825, a memory 830, and a processor 840. These components may be in electronic communication via one or more buses (e.g., bus 845).

[0173] The communication manager 810 may receive an indication of a reception category for a second wireless device in a sidelink communication message, the reception category indicating a reception parameter of the second wireless device; and transmit a shared sidelink channel message to the second wireless device based on the reception category of the second wireless device. The communication manager 810 may also receive an indication of a transmission category for the second wireless device in a sidelink communication message, the transmission category indicating a transmission parameter of the second wireless device; determine, based on the indication, that the transmission parameter of the second wireless device is greater than a reception parameter of the first wireless device, wherein the reception parameter is based on the reception category of the first wireless device; receive the shared sidelink channel message; and determine, based on the determination that the transmission parameter of the second wireless device is greater than the reception parameter of the first wireless device, to refrain from decoding the shared sidelink channel message. The communication manager 810 may also receive an indication of a transmission category for the second wireless device in a sidelink communication message, the transmission category indicating a transmission parameter of the second wireless device; determine, based on the indication, that the transmission parameter of the second wireless device is less than or equal to the reception parameter of the first wireless device, wherein the reception parameter is based on the reception category of the first wireless device; receive the shared sidelink channel message; and determine, based on the determination that the transmission parameter of the second wireless device is less than or equal to the reception parameter of the first wireless device, to decode the shared sidelink channel message.

[0174] I / O controller 815 can manage input and output signals for device 805. I / O controller 815 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 815 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 815 can utilize an operating system, such as or another known operating system. In other cases, I / O controller 815 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 815 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I / O controller 815 or via hardware components controlled by I / O controller 815.

[0175] The transceiver 820 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 820 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 820 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate packets received from the antenna.

[0176] In some cases, a wireless device may include a single antenna 825. However, in some cases, the device may have more than one antenna 825, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0177] The memory 830 may include random access memory (RAM) and read-only memory (ROM). The memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 830 may include, among other things, a basic I / O system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0178] The processor 840 may 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, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause the device 805 to perform various functions (e.g., various functions or tasks supporting the wireless device transmit and receive capabilities in the sidelink control information).

[0179] The code 835 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 835 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, the code 835 may not be directly executed by the processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0180] Figure 9 A flow chart illustrating a method 900 for supporting wireless device transmit and receive capabilities in sidelink control information according to aspects of the present disclosure is shown. The operations of the method 900 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 900 may be implemented by a UE 115 or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0181] At 905, the UE may receive an indication of a reception category of the second wireless device in a sidelink communication message, the reception category indicating reception parameters of the second wireless device. The operations of 905 may be performed according to the methods described herein. In some examples, aspects of the operations of 905 may be as described with reference to Figures 5 to 8 The described side link receiving component is performed.

[0182] At 910, the UE may transmit a shared sidelink channel message to the second wireless device based on the reception category of the second wireless device. The operations of 910 may be performed according to the methods described herein. In some examples, aspects of the operations of 910 may be as described with reference to Figures 5 to 8 The sidelink transmission component described is used to perform.

[0183] Figure 10 A flow chart illustrating a method 1000 for supporting wireless device transmission and reception capabilities in sidelink control information according to aspects of the present disclosure is shown. The operations of the method 1000 may be implemented by the UE 115 or components thereof as described herein. For example, the operations of the method 1000 may be implemented by the UE 115 or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0184] At 1005, the UE may receive an indication of a transmission class for a second wireless device in a sidelink communication message, the transmission class indicating transmission parameters of the second wireless device. The operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be as described with reference to Figures 5 to 8 The described side link receiving component is performed.

[0185] At 1010, the UE may determine, based on the indication, that a transmission parameter of the second wireless device is greater than a reception parameter of the first wireless device, wherein the reception parameter is based on a reception category of the first wireless device. The operations of 1010 may be performed according to the methods described herein. In some examples, aspects of the operations of 1010 may be performed as described with reference to Figures 5 to 8 The parameters described determine the components to perform.

[0186] At 1015, the UE may receive a shared sidelink channel message. The operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operations of 1015 may be as described with reference to Figures 5 to 8 The described side link channel receiving component is executed.

[0187] At 1020, the UE may determine to refrain from decoding the shared side link channel message based on determining that the transmission parameter of the second wireless device is greater than the reception parameter of the first wireless device. The operations of 1020 may be performed according to the methods described herein. In some examples, aspects of the operations of 1020 may be as described with reference to Figures 5 to 8 The decoding component described is performed.

[0188] Figure 11A flow chart illustrating a method 1100 for supporting wireless device transmission and reception capabilities in sidelink control information according to aspects of the present disclosure is shown. The operations of the method 1100 may be implemented by the UE 115 or components thereof as described herein. For example, the operations of the method 1100 may be implemented by the UE 115 or components thereof as described herein. Figures 5 to 8 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0189] At 1105, the UE may receive an indication of a transmission class for the second wireless device in a sidelink communication message, the transmission class indicating transmission parameters of the second wireless device. The operations of 1105 may be performed according to the methods described herein. In some examples, aspects of the operations of 1105 may be as described with reference to Figures 5 to 8 The described side link receiving component is performed.

[0190] At 1110, the UE may determine, based on the indication, that a transmission parameter of the second wireless device is lower than or equal to a reception parameter of the first wireless device, wherein the reception parameter is based on a reception category of the first wireless device. The operations of 1110 may be performed according to the methods described herein. In some examples, aspects of the operations of 1110 may be as described with reference to Figures 5 to 8 The parameters described determine the components to perform.

[0191] At 1115, the UE may receive a shared sidelink channel message. The operations of 1115 may be performed according to the methods described herein. In some examples, aspects of the operations of 1115 may be as described with reference to Figures 5 to 8 The described side link channel receiving component is executed.

[0192] At 1120, the UE may determine to decode the shared side link channel message based on determining that the transmission parameter of the second wireless device is less than or equal to the reception parameter of the first wireless device. The operations of 1120 may be performed according to the methods described herein. In some examples, aspects of the operations of 1120 may be as described with reference to Figures 5 to 8 The decoding component described is performed.

[0193] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0194] The following examples are given by way of illustration. Aspects of the following examples may be combined with various aspects or embodiments shown or discussed in the accompanying drawings or elsewhere in this document.

[0195] Example 1 is a method of wireless communication at a first wireless device, comprising: receiving an indication of a reception category of a second wireless device in a sidelink communication message, the reception category indicating reception parameters of the second wireless device; and transmitting a shared sidelink channel message to the second wireless device based on the reception category of the second wireless device.

[0196] In Example 2, the method of Example 1 further includes determining a segmentation, an MCS, and a resource block configuration based on a reception category of the second wireless device; and transmitting the shared sidelink channel message based on the determined segmentation, MCS, and resource block configuration.

[0197] In Example 3, the method of any one of Examples 1-2 further comprising determining the segmentation, MCS, and resource block configuration may include operations, features, means, or instructions for determining an MCS and resource block configuration that does not exceed a reception category of the second wireless device.

[0198] In Example 4, the method of any one of Examples 1 to 3 further includes determining the segmentation, MCS, and resource block configuration may include operations, features, devices, or instructions for the following actions: determining the segmentation, MCS, and resource block configuration based on an algorithm, wherein the algorithm is based on throughput calculation, latency calculation, or a combination thereof.

[0199] In Example 5, the method of any one of Examples 1 to 4 includes: the sidelink communication message including a physical sidelink control channel message.

[0200] In Example 6, the method of any one of Examples 1 to 5 includes: the sidelink communication message including a sidelink control information message.

[0201] In Example 7, the method of any one of Examples 1 to 6 includes: the reception parameter can be the number of bits that the second wireless device can be able to receive within the transmission time interval, where the number of bits can be the number of sidelink shared channel transmission block bits or the number of bits of the sidelink shared channel transmission block.

[0202] In Example 8, the method of any one of Examples 1 to 7 includes receiving the parameter including a number of supported soft channel bits.

[0203] In Example 9, the method of any one of Examples 1 to 8 includes: the sidelink communication message comprising a broadcast message.

[0204] Example 10 is a system or apparatus comprising means for implementing the method of any one of Examples 1 to 9 or for implementing the apparatus of any one of Examples 1 to 9.

[0205] Example 11 is a non-transitory computer-readable medium storing instructions executable by one or more processors to cause the one or more processors to implement the method of any one of Examples 1 to 9.

[0206] Example 12 is a system comprising one or more processors and a memory in electronic communication with the one or more processors, the memory storing instructions executable by the one or more processors to cause the system or device to implement a method as in any one of Examples 1 to 9.

[0207] Example 13 is a method of wireless communication at a first wireless device, comprising: receiving an indication of a transmit class of a second wireless device in a sidelink communication message, the transmit class indicating a transmit parameter of the second wireless device; determining, based on the indication, that the transmit parameter of the second wireless device is greater than a receive parameter of the first wireless device, wherein the receive parameter is based on the receive class of the first wireless device; receiving a shared sidelink channel message; and determining to refrain from decoding the shared sidelink channel message based on determining that the transmit parameter of the second wireless device is greater than the receive parameter of the first wireless device.

[0208] In Example 14, the method of Example 13 includes: the sidelink communication message includes a physical sidelink control channel message.

[0209] In Example 15, the method of either Example 13 or 14 includes: the sidelink communication message includes a sidelink control information message.

[0210] In Example 16, the method of any one of Examples 13 to 15 includes: the reception parameter may be a number of bits that the second wireless device may be able to receive within the transmission time interval.

[0211] In Example 17, the method of any one of Examples 13 to 16 includes: the number of bits that the first wireless device can receive within the transmission time interval includes the number of sidelink shared channel transmission block bits that the first wireless device can receive within the transmission time interval, or the number of bits of the sidelink shared channel transmission block that the first wireless device can receive within the transmission time interval.

[0212] In Example 18, the method of any one of Examples 13 to 17 includes: the transmission parameter may be a number of bits that the first wireless device may be able to transmit within the transmission time interval.

[0213] In Example 19, the method of any one of Examples 13 to 18 includes: the number of bits may be a number of transport block bits.

[0214] In Example 20, the method of any one of Examples 13 to 19 includes: the number of bits that the second wireless device can transmit within the transmission time interval includes the number of sidelink shared channel transmission block bits that the second wireless device can transmit within the transmission time interval, or the number of bits of the sidelink shared channel transmission block that the second wireless device can transmit within the transmission time interval.

[0215] In Example 21, the method of any one of Examples 13-20 includes receiving a parameter including a number of supported soft channel bits.

[0216] In Example 22, the method of any one of Examples 13 to 21 includes transmitting the parameter including a number of supported layers for spatial multiplexing by the second wireless device.

[0217] In Example 23, the method of any one of Examples 13 to 22 includes: the sidelink communication message including a broadcast message.

[0218] In Example 24, the method of any of the examples, the transmission class indicates a variable transmission class based on a communication configuration.

[0219] Example 25 is a system or apparatus comprising means for implementing the method of any one of Examples 13 to 24 or for implementing the apparatus of any one of Examples 13 to 24.

[0220] Example 26 is a non-transitory computer-readable medium storing instructions executable by one or more processors to cause the one or more processors to implement the method of any one of Examples 13 to 24.

[0221] Example 27 is a system comprising one or more processors and a memory in electronic communication with the one or more processors, the memory storing instructions executable by the one or more processors to cause the system or device to implement a method as in any of Examples 13 to 24.

[0222] Example 28 is a method of wireless communication at a first wireless device, comprising: receiving an indication of a transmit class of a second wireless device in a sidelink communication message, the transmit class indicating a transmit parameter of the second wireless device; determining, based on the indication, that the transmit parameter of the second wireless device is less than or equal to a receive parameter of the first wireless device, wherein the receive parameter is based on the receive class of the first wireless device; receiving a shared sidelink channel message; and determining to decode the shared sidelink channel message based on determining that the transmit parameter of the second wireless device is less than or equal to the receive parameter of the first wireless device.

[0223] In Example 29, the method of Example 29 includes: the reception parameter may be a number of bits that the first wireless device may be able to receive within the transmission time interval.

[0224] In Example 30, the method of any one of Examples 28 to 29 includes: the number of bits may be a number of transport block bits.

[0225] In Example 31, the method of any one of Examples 28 to 30 includes: the number of bits that the first wireless device can receive within the transmission time interval includes the number of sidelink shared channel transmission block bits that the first wireless device can receive within the transmission time interval, or the number of bits of the sidelink shared channel transmission block that the first wireless device can receive within the transmission time interval.

[0226] In Example 32, the method of any one of Examples 28 to 31 further includes determining the shared side link channel message to be decoded based on the number of side link shared channel transport block bits that the first wireless device can be able to receive within the transmission time interval and the number of bits of the side link shared channel transport block that the first wireless device can be able to receive within the transmission time interval.

[0227] In Example 33, the method of any one of Examples 28 to 32 includes: the transmission parameter may be a number of bits that the second wireless device may be able to transmit within the transmission time interval.

[0228] In Example 34, the method of any one of Examples 28 to 33 includes: the number of bits that the second wireless device can transmit within the transmission time interval includes the number of sidelink shared channel transmission block bits that the second wireless device can transmit within the transmission time interval, or the number of bits of the sidelink shared channel transmission block that the second wireless device can transmit within the transmission time interval.

[0229] In Example 35, the method of any one of Examples 28-34 further includes decoding the shared sidelink channel message, and performing a reference signal power exclusion process or determining a code rate limit, or a combination thereof based on the decoding.

[0230] Example 36 is a system or apparatus comprising means for implementing the method of any one of Examples 28 to 34 or for implementing the apparatus of any one of Examples 18 to 24.

[0231] Example 37 is a non-transitory computer-readable medium storing instructions executable by one or more processors to cause the one or more processors to implement the method of any one of Examples 28 to 34.

[0232] Example 38 is a system comprising one or more processors and a memory in electronic communication with the one or more processors, the memory storing instructions executable by the one or more processors to cause the system or device to implement a method as in any one of Examples 28 to 34.

[0233] Aspects of these examples may be combined with aspects or embodiments disclosed in other implementations.

[0234] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and the terminology of LTE, LTE-A, LTE-A Pro, or NR may be used throughout much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable to various other wireless communication 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, and other systems and radio technologies not explicitly mentioned herein.

[0235] The 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 referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0236] The various illustrative blocks and components described in conjunction 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. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0237] 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, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or code. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0238] Computer-readable media include both non-transient computer storage media and communication media, which include any media that facilitates a computer program to be transferred from one place to another. Non-transient storage media can be any available medium that can be accessed by a general or special-purpose computer. As an example and not limitation, non-transient computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transient medium that can be used to carry or store the desired program code means of an instruction or data structure form and can be accessed by a general or special-purpose computer, or a general or special-purpose processor. Similarly, any connection is also properly referred to as a computer-readable medium. For example, if software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of computer-readable media. Disk and disc, as used herein, include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, 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.

[0239] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items followed by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so 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). Likewise, as used herein, the phrase "based on" should not be read as referencing a closed set of conditions. For example, an example step described as "based on condition A" could be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be read in the same manner as the phrase "based at least in part on."

[0240] In the accompanying drawings, similar components or features may have the same reference number. In addition, components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between the similar components. If only the first reference number is used in the specification, the description applies to any of the similar components having the same first reference number, regardless of the second reference number or other subsequent reference numbers.

[0241] The description set forth herein in conjunction with the accompanying drawings describes example configurations and does not represent all examples that can be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0242] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a first wireless device, comprising: receiving an indication of a reception category for a second wireless device in a sidelink communication message, the reception category indicating reception parameters for the second wireless device; determining a segmentation, a modulation and coding scheme, and a resource block configuration that do not exceed reception parameters indicated by the reception category of the second wireless device; as well as A shared sidelink channel message is transmitted to the second wireless device based at least in part on the determined segmentation, the modulation and coding scheme, and the resource block configuration.

2. The method of claim 1 , wherein determining the segmentation, the modulation and coding scheme, and the resource block configuration comprises: The segmentation, the modulation and coding scheme, and the resource block configuration are determined based at least in part on an algorithm, wherein the algorithm is based at least in part on a throughput calculation, a latency calculation, or a combination thereof.

3. The method of claim 1 , wherein the sidelink communication message comprises a physical sidelink control channel message, a sidelink control information message, or a broadcast message.

4. A method for wireless communication at a first wireless device, comprising: receiving an indication of a transmit class for a second wireless device in a sidelink communication message, the transmit class indicating a transmit parameter for the second wireless device, wherein the transmit parameter is a number of bits that the first wireless device can transmit in a transmission time interval; determining, based at least in part on the indication, that the transmit parameter of the second wireless device is greater than a receive parameter of the first wireless device, wherein the receive parameter is based at least in part on a reception category of the first wireless device, wherein the receive parameter is a number of bits that the second wireless device is capable of receiving within a transmission time interval; receiving a shared side link channel message; as well as A determination is made to refrain from decoding the shared sidelink channel message based at least in part on a determination that the transmit parameter of the second wireless device is greater than the receive parameter of the first wireless device.

5. The method of claim 4, wherein the sidelink communication message comprises a physical sidelink control channel message, a sidelink control information message, or a broadcast message.

6. The method of claim 4 , wherein the number of bits that the first wireless device can receive within a transmission time interval comprises: The number of sidelink shared channel transport block bits that the first wireless device can receive within the transmission time interval, or the number of sidelink shared channel transport block bits that the first wireless device can receive within the transmission time interval.

7. The method of claim 4 , wherein the number of bits that the second wireless device can transmit within the transmission time interval comprises: The number of sidelink shared channel transport block bits that the second wireless device can transmit within the transmission time interval, or the number of sidelink shared channel transport block bits that the second wireless device can transmit within the transmission time interval.

8. A method for wireless communication at a first wireless device, comprising: receiving an indication of a transmit class for a second wireless device in a sidelink communication message, the transmit class indicating a transmit parameter for the second wireless device, wherein the transmit parameter is a number of bits that the second wireless device can transmit in a transmission time interval; determining, based at least in part on the indication, that the transmit parameter of the second wireless device is less than or equal to a receive parameter of the first wireless device, wherein the receive parameter is based at least in part on a reception category of the first wireless device, wherein the receive parameter is a number of bits that the first wireless device is capable of receiving within a transmission time interval; receiving a shared side link channel message; as well as Determining to decode the shared sidelink channel message is based at least in part on determining that the transmit parameter of the second wireless device is less than or equal to the receive parameter of the first wireless device.

9. The method of claim 8, wherein the number of bits that the first wireless device can receive within a transmission time interval comprises: The number of sidelink shared channel transport block bits that the first wireless device can receive within the transmission time interval, or the number of sidelink shared channel transport block bits that the first wireless device can receive within the transmission time interval.

10. The method of claim 8, further comprising: Determining to decode the shared sidelink channel message based at least in part on the number of sidelink shared channel transport block bits that the first wireless device is capable of receiving within a transmission time interval and the number of bits of the sidelink shared channel transport block that the first wireless device is capable of receiving within a transmission time interval.

11. The method of claim 8, wherein the number of bits that the second wireless device can transmit within a transmission time interval comprises: The number of sidelink shared channel transport block bits that the second wireless device can transmit within the transmission time interval, or the number of sidelink shared channel transport block bits that the second wireless device can transmit within the transmission time interval.

12. An apparatus for wireless communication at a first wireless device, comprising: processor, a memory coupled to the processor; as well as instructions stored in the memory and executable by the processor to cause the apparatus to: receiving an indication of a reception category for a second wireless device in a sidelink communication message, the reception category indicating reception parameters for the second wireless device; determining a segmentation, a modulation and coding scheme, and a resource block configuration that do not exceed reception parameters indicated by the reception category of the second wireless device; as well as A shared sidelink channel message is transmitted to the second wireless device based at least in part on the determined segmentation, the modulation and coding scheme, and the resource block configuration.

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