Sidelink capability signaling and configuration

Abstract

In one aspect, the present disclosure includes a method, an apparatus, and a computer-readable medium for wireless communications, which are used to perform the following operations: transmitting a capability indication message by a user equipment (UE) to a network entity, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; receiving a configuration message in response to the capability indication message from the network entity at the UE, wherein the configuration message includes one or more configuration parameters based on the side link capability; and establishing a communication link based on the one or more configuration parameters.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Provisional Application No. 62 / 861,820, filed on June 14, 2019, entitled “Sidelink Capability Signaling and Configuration,” and U.S. Patent Application No. 16 / 900,405, filed on June 12, 2020, entitled “Sidelink Capability Signaling and Configuration,” both of which are expressly incorporated herein by reference in their entirety. background Technical Field

[0004] The present disclosure relates generally to communication systems, and more particularly to communicating sidelink capability information for user equipment (UE).

[0005] introduction

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0007] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is a part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5GNR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR can be based on 4G Long Term Evolution (LTE) standards. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0008] Some wireless communication networks include device-to-device (D2D) communications, such as, but not limited to, vehicle-based communication devices, which may communicate from vehicle to vehicle (V2V), vehicle to infrastructure (V2I) (e.g., from a vehicle-based communication device to a road infrastructure node), vehicle to network (V2N) (e.g., from a vehicle-based communication device to one or more network nodes, such as a base station), combinations thereof, and / or with other devices, which may be collectively referred to as vehicle-to-everything (V2X) communications. In such systems, synchronization mechanisms (e.g., timing and / or frequency synchronization) for user equipment (UE) may be based on a connection to a global navigation satellite system (GNSS) or a cellular base station. Alternatively, in the absence of a connection to a GNSS or base station, synchronization for the UE may require sidelink synchronization with another UE that is already synchronized with the GNSS or base station.

[0009] Overview

[0010] A brief summary of one or more aspects is given below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be presented later.

[0011] According to an example, a method for wireless communication is provided. The method includes: transmitting a capability indication message by a user equipment (UE) to a network entity, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; receiving a configuration message at the UE from the network entity in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the side link capability; and establishing a communication link based on the one or more configuration parameters.

[0012] In a further example, an apparatus for wireless communication is provided, the apparatus comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory. This aspect may include the one or more processors being configured to perform the following operations: transmitting a capability indication message by a UE to a network entity, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; receiving a configuration message at the UE from the network entity in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the side link capability; and establishing a communication link based on the one or more configuration parameters.

[0013] On the other hand, a device for wireless communication is provided, comprising: a device for transmitting a capability indication message by a UE to a network entity, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; a device for receiving a configuration message in response to the capability indication message from the network entity at the UE, wherein the configuration message includes one or more configuration parameters based on the side link capability; and a device for establishing a communication link based on the one or more configuration parameters.

[0014] On the other hand, a non-transitory computer-readable medium is provided, comprising: code for transmitting a capability indication message by a UE to a network entity, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; code for receiving a configuration message in response to the capability indication message from the network entity at the UE, wherein the configuration message includes one or more configuration parameters based on the side link capability; and code for establishing a communication link based on the one or more configuration parameters.

[0015] In another example, a method for wireless communication includes: receiving, by a network entity, a capability indication message from a UE, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; transmitting, by the network entity in response to the capability indication message, a configuration message to the UE, wherein the configuration message includes one or more configuration parameters based on the side link capability; and establishing a communication link based on the one or more configuration parameters.

[0016] In a further example, an apparatus for wireless communication is provided, the apparatus comprising a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory. This aspect may include the one or more processors being configured to perform the following operations: receiving a capability indication message from a UE by a network entity, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; transmitting a configuration message to the UE by the network entity in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the side link capability; and establishing a communication link based on the one or more configuration parameters.

[0017] On the other hand, a device for wireless communication is provided, comprising: a device for receiving a capability indication message from a UE by a network entity, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; a device for transmitting a configuration message to the UE by the network entity in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the side link capability; and a device for establishing a communication link based on the one or more configuration parameters.

[0018] On the other hand, a non-transitory computer-readable medium is provided, comprising: code for receiving, by a network entity, a capability indication message from a UE, the capability indication message comprising a side link capability for direct communication between the UE and one or more secondary UEs; code for transmitting, by the network entity, a configuration message to the UE in response to the capability indication message, wherein the configuration message comprises one or more configuration parameters based on the side link capability; and code for establishing a communication link based on the one or more configuration parameters.

[0019] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are merely indicative of several of the various ways in which the principles of the various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0022] Figure 2A , 2B , 2C, and 2D are diagrams illustrating examples of a first 5G / NR frame, a DL channel within a 5G / NR subframe, a second 5G / NR frame, and a UL channel within a 5G / NR subframe, respectively.

[0023] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0024] Figure 4 is a diagram illustrating an example of communicating sidelink capability information between a UE and one or more network entities.

[0025] Figure 5 is a diagram illustrating an example of at least two UEs communicating via a side link.

[0026] Figure 6 is a flow chart of a wireless communication method of a UE for communicating sidelink capability information.

[0027] Figure 7 is a flow chart of a wireless communication method of a network entity communicating sidelink capability information.

[0028] Figure 8 is a block diagram illustrating an example of a UE in accordance with various aspects of the present disclosure.

[0029] Fig. 9 is a block diagram illustrating an example of a base station in accordance with various aspects of the present disclosure.

[0030] Detailed Description

[0031] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid diluting such concepts.

[0032] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0033] As an example, an element, or any part of an element, or any combination of elements may be implemented as a "processing system" including one or more processors. Examples of processors include: microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system may execute software. Software may be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0034] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, these functions may be stored or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of computer-readable media of the above types, or any other medium that may be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0035] Figure 1 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)).

[0036] In certain aspects, the UE 104 may be configured to operate the configuration component 198 to transmit a capability indication message to the network entity 102, wherein the capability indication message includes a side link capability for direct communication between the UE 104 and one or more secondary UEs 104. The UE 104 may receive a configuration message in response to the capability indication message from the network entity 102, wherein the configuration message includes one or more configuration parameters based on the side link capability. In this way, the UE 104 may establish a communication link based on the one or more configuration parameters.

[0037] Accordingly, in certain aspects, the network entity 102 (e.g., a base station) may be configured to operate a configuration component 199 to receive a capability indication message from a UE 104. As mentioned, the capability indication message includes a side link capability for direct communication between the UE 104 and one or more secondary UEs 104 (e.g., side link UEs). The network entity 102 may transmit a configuration message to the UE 104 in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the side link capability. In this way, the network entity 102 may help the UE 104 to establish a communication link based on the one or more configuration parameters.

[0038] Base stations 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells include base stations. Small cells include femto cells, pico cells, and micro cells.

[0039] Base stations 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with EPC 160 via a backhaul link 132 (e.g., an S1 interface). Base stations 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network 190 via a backhaul link 184. Base stations 102 may perform one or more of the following functions, among other functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of alert messages. Base stations 102 may communicate with each other over a backhaul link 134 (eg, an X2 interface) directly or indirectly (eg, through EPC 160 or core network 190). Backhaul link 134 may be wired or wireless.

[0040] Base stations 102 may communicate wirelessly with UE 104. Each base station 102 may provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved B node (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between a base station 102 and a UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. These communication links may be through one or more carriers. The base station 102 / UE 104 may use spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth for each carrier allocated in the carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0041] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0042] The wireless communication system may further include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0043] The small cell 102' may operate in a licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0044] Whether a small cell 102' or a large cell (e.g., a macro base station), the base station 102 may include an eNB, a gB node (gNB), or another type of base station. Some base stations (such as gNB 180) may operate in traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. The radio waves in this band may be referred to as millimeter waves. Near mmW can be extended down to 3 GHz frequencies with a wavelength of 100 mm. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, which is also referred to as centimeter waves. Communications using mmW / near mmW radio frequency bands (e.g., 3 GHz–300 GHz) have extremely high path loss and short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.

[0045] Base station 180 may transmit beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182". UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or may be different. The transmit direction and receive direction of UE 104 may be the same or may be different.

[0046] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may be in communication with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS-related charging information.

[0047] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. AMF 192 may be in communication with a unified data management (UDM) 196. AMF 192 is a control node that handles signaling between UE 104 and the core network 190. In general, AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are delivered through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 is connected to IP services 197. IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services.

[0048] A base station may also be referred to as a gNB, a Node B, an evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmission reception point (TRP), or some other suitable term. The base station 102 provides an access point to the EPC 160 or the core network 190 for the UE 104. Examples of UE 104 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a health care device, an implant, a sensor / actuator, a display, or any other similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, ovens, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0049] Figures 2A-2D Included are diagrams of example frame structures and resources that may be utilized in communications between base station 102, UE 104, and / or secondary UE (or sidelink UE) 110 as described in the present disclosure. Figure 2A 200 is a diagram illustrating an example of a first subframe within a 5G / NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G / NR subframe. Figure 2C 250 is a diagram illustrating an example of a second subframe within a 5G / NR frame structure. Figure 2D 280 is a diagram illustrating an example of an UL channel within a 5G / NR subframe. The 5G / NR frame structure may be FDD, where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or TDD, where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A , 2CIn the example provided, the 5G / NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 34 (mostly UL), where D is DL, U is UL, and X is for flexible use between DL / UL. Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured with a slot format (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling) through the received slot format indicator (SFI). Note that the following description also applies to the 5G / NR frame structure for TDD.

[0050] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the time slot configuration and parameter design. For slot configuration 0, different parameter designs μ0 to 5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Accordingly, for slot configuration 0 and parameter design μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration vary depending on parameter design. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is parameter design 0 to 5. Thus, parameter design μ=0 has a subcarrier spacing of 15kHz, while parameter design μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figure 2A-2D An example of slot configuration 0 with 14 symbols per slot and parameter design μ=0 is provided, with 1 slot per subframe. The subcarrier spacing is 15 kHz and the symbol duration is about 66.7 μs.

[0051] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also called a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a number of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0052] like Figure 2A As explained in the illustration, some REs carry reference (pilot) signals (RS) for UEs. RSs may include demodulation RSs (DM-RSs) for channel estimation at the UE (indicated as R for a particular configuration). x , where 100x is the port number, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS). RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0053] Figure 2B An example of various DL channels within a subframe of an explanation frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE includes 9 RE groups (REGs), and each REG includes 4 consecutive REs in an OFDM symbol. The primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by the UE 104 to determine the subframe / symbol timing and the physical layer identity. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE may determine the physical cell identifier (PCI). Based on the PCI, the UE may determine the location of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) may be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The MIB provides the number of RBs in the system bandwidth, as well as the system frame number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0054] As in Figure 2CAs illustrated in FIG, some REs carry DM-RSs for channel estimation at the base station (indicated as R for one particular configuration, but other DM-RS configurations are possible). The UE may transmit DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first or first two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and on the specific PUCCH format used. Although not shown, the UE may transmit a sounding reference signal (SRS). The SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0055] Figure 2D An example of various UL channels within a subframe of an illustration frame. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0056] Figure 33 is a block diagram of a base station 310 in communication with a UE 350 in an access network, where the base station 310 may be an example implementation of the base station 102, and where the UE 350 may be an example implementation of the UE 104. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a media access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration of UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (ciphering, cipher decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0057] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes and for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0058] At the UE 350, each receiver 354RX receives a signal through its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If there are multiple spatial streams destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then transforms the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the signal constellation point most likely transmitted by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. These data and control signals are then provided to the controller / processor 359 which implements layer 3 and layer 2 functionality.

[0059] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher interpretation, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0060] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0061] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by a TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0062] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0063] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher decoding, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0064] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 198 combined aspects.

[0065] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 199 combined aspects.

[0066] The described features generally relate to communicating sidelink capability information for a UE. For example, sidelink or D2D communications may include vehicle-to-vehicle (V2V) communications, vehicle-to-infrastructure (V2I) communications (e.g., from a vehicle-based communication device to a road infrastructure node), vehicle-to-network (V2N) communications (e.g., from a vehicle-based communication device to a network node, such as a base station), combinations thereof, and / or communications with other devices, which may be collectively referred to as V2X communications. In general, support for synchronization using SSB within a synchronization signal burst is provided in 5G NR communication technology over the Uu interface (e.g., from a g B node (gNB) to a user equipment (UE), e.g., as described herein with reference to Figures 2A-2D As described herein Figures 2A-2D Similar synchronization as described can also be implemented on the sidelink channel in V2X communication. For example, in V2X or other D2D communications, a UE that has received a synchronization signal from a gNB or a global navigation satellite system (GNSS) can transmit a sidelink synchronization signal consistent with the timing and / or frequency of the gNB or GNSS so that other UEs outside the range of the gNB and / or GNSS can also be synchronized to this timing and / or frequency. In addition, a UE that has not received a synchronization signal from a gNB or GNSS can also transmit a sidelink synchronization signal to synchronize with other UEs and send data to other UEs.

[0067] For example, in one aspect, the present disclosure includes a method, apparatus, and computer-readable medium for wireless communication for efficiently communicating sidelink capability information for a UE. This aspect may include: transmitting a capability indication message by a UE to a network entity, the capability indication message including a sidelink capability for direct communication between the UE and one or more secondary UEs; receiving a configuration message at the UE from the network entity in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the sidelink capability; and establishing a communication link based on the one or more configuration parameters.

[0068] In another example, on the one hand, the present disclosure includes a method, an apparatus, and a computer-readable medium for wireless communication, which are used to perform the following operations: a network entity receives a capability indication message from a UE, the capability indication message including a side link capability for direct communication between the UE and one or more secondary UEs; the network entity transmits a configuration message to the UE in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the side link capability; and establishes a communication link based on the one or more configuration parameters.

[0069] Figure 4 4 is a diagram illustrating an example of communicating sidelink capability information between UE 402, gNB 404, and UE 406. For example, UE 402 may communicate with Figure 1 The gNB / ng-eNB / eNB may be similar or identical to the base station 102, and the UE 406 may be similar or identical to the UE 104.

[0070] In one aspect, at step 1, UE 402 may be turned on, and at step 2, may connect with gNB 404. In one example, the connection may include: UE 402 receiving system information block 1 (SIB1) and performing a random access procedure to establish a communication link with gNB 404. At step 3, gNB 404 may transmit a capability request to UE 402. At step 4, UE 402 may transmit a capability indication message to gNB 404 in response to receiving the capability request. For example, the capability indication message includes a sidelink capability for direct communication between UE 402 and UE 406. At step 5, gNB 404 may forward the sidelink capability associated with the capability indication message to UE 406.

[0071] In step 6, gNB 404 may configure one or more bandwidth parts (BWPs) for UE 402 to establish sidelink communications with UE 406. In step 7, gNB 404 may transmit a sidelink capabilities message to UE 402, the sidelink capabilities message including one or more configuration parameters based on the sidelink capabilities. In step 8, UE 402 and UE 406 may establish sidelink communications. In step 9, after a period of time, UE 402 may determine whether a change in its capabilities corresponding to the sidelink capabilities has occurred. If a change has occurred, then in step 10, UE 402 may transmit an update message to gNB 404 to make any necessary modifications and / or configurations. In step 11, in response to any changes, UE 402 and UE 406 may update and continue sidelink communications.

[0072] Figure 5 5 is a diagram illustrating an example of sidelink communication between UE 502 and UE 504. For example, UE 502 may communicate with Figure 1 104 is similar or identical to UE 104, and UE 504 can be similar to Figure 1 UE 104 is similar or identical.

[0073] In step 1, UE 502 may transmit a sidelink synchronization signal to UE 504 to initiate a sidelink communication link. In step 2, UE 502 and UE 504 may establish communication to establish a sidelink. In step 3, UE 502 may transmit its sidelink capability information to UE 504. In addition, the sidelink capabilities may also be transmitted partially or in full as part of step 1 and / or step 2. For example, the synchronization signal used between the UE and the gNB contains a PBCH carrying a MIB payload, and before the UE initiates a connection via a RACH transmission, the UE also reads the remaining minimum system information (RMSI) in SIB1 after reading the PBCH. Similar PBCH-like or SIB1-like payload transmissions may also be part of the sidelink synchronization signal and / or sidelink SIB-1 transmission. In addition, some capabilities may also be exchanged as part of the step 2 procedure (equivalent to the RACH procedure for UE to gNB connection establishment). Additionally, in step 4, UE 504 may transmit its sidelink capability information to UE 502. In response to each UE receiving the sidelink capabilities of the other UE, UE 502 and UE 504 may configure their respective communications at step 5. At step 6, UE 502 and UE 504 may establish sidelink communications.

[0074] Figure 6600 is a flow chart of a wireless communication method. The method may be performed by a UE (e.g., UE 104; device 350; controller / processor 359 (which may include memory 360), processor(s) 812 (which may include memory 816, modem 840), and they may be the entire UE 104 or components of the UE 104 (such as TX processor 368, RX processor 356 and / or transceiver 802)).

[0075] At 602, method 600 includes transmitting, by a user equipment (UE), a capability indication message to a network entity, the capability indication message including a sidelink capability for direct communication between the UE and one or more secondary UEs. In one aspect, the UE 104 and / or configuration component 198 (e.g., in conjunction with controller / processor 359 (which may include memory 360), processor(s) 812 (which may include memory 816, modem 840), TX processor 368, and transceiver 802) may transmit a capability indication message to a network entity, the capability indication message including a sidelink capability for direct communication between the UE and one or more secondary UEs. In this way, the UE 104 and / or the configuration component 198 (e.g., in combination with the controller / processor 359 (which may include the memory 360), the processor(s) 812 (which may include the memory 816, the modem 840), the TX processor 368, and the transceiver 802)) may define a device for transmitting a capability indication message to the network entity 102, wherein the capability indication message includes a side link capability for direct communication between the UE 104 and one or more secondary UEs 104.

[0076] At 604, method 600 includes receiving, at the UE, a configuration message from the network entity in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the sidelink capability. In one aspect, UE 104 and / or configuration component 198 (e.g., in conjunction with controller / processor 359 (which may include memory 360), processor(s) 812 (which may include memory 816, modem 840), RX processor 356, and transceiver 802) may receive a configuration message in response to the capability indication message from network entity 102, wherein the configuration message includes one or more configuration parameters based on the sidelink capability. As such, configuration component 198 (e.g., in conjunction with controller / processor 359 (which may include memory 360), processor(s) 812 (which may include memory 816, modem 840), RX processor 356, and transceiver 802)) may define means for receiving a configuration message in response to the capability indication message from network entity 102, wherein the configuration message includes one or more configuration parameters based on the sidelink capability.

[0077] At 606, method 600 includes establishing a communication link based on the one or more configuration parameters. In one aspect, UE 104 and / or configuration component 198 (e.g., in conjunction with controller / processor 359 (which may include memory 360), processor(s) 812 (which may include memory 816, modem 840), and establishment component 240) may establish a communication link based on the one or more configuration parameters. As such, configuration component 198 (e.g., in conjunction with controller / processor 359 (which may include memory 360), processor(s) 812 (which may include memory 816, modem 840), and establishment component 240) may define means for establishing a communication link based on the one or more configuration parameters.

[0078] In an example, method 600 may include determining a capability value associated with the configuration message, the capability value indicating one or more enabled configurations corresponding to the side link capability, wherein establishing the communication link is further based on the one or more enabled configurations.

[0079] In another example, transmitting the capability indication message including the sidelink capability includes transmitting the sidelink duplex mode capability.In addition, establishing a communication link between the UE and one or more secondary UEs further includes operating, by the UE, in a duplex mode corresponding to the sidelink duplex mode capability.

[0080] In one example, transmitting the sidelink duplex mode capability includes transmitting one or any combination of the following: a half-duplex mode capability for communicating between an access link with a network entity and a side link with a corresponding secondary UE; a transmission multiplexing mode capability, which is capable of using one or more access links to transmit to one or more network entities, and concurrently capable of using a corresponding side link or corresponding multiple side links to transmit to one or more of the secondary UEs; a reception multiplexing mode capability, which is capable of using one or more access links to receive from one or more network entities. receiving, and concurrently being able to use the corresponding side link or corresponding multiple side links to receive from one or more of the secondary UEs; transmitting full-duplex mode capability, the transmitting full-duplex mode capability is capable of transmitting to the first node and concurrently being able to receive from the second node; and receiving full-duplex mode capability, the receiving full-duplex mode capability is capable of receiving from the first node and concurrently being able to transmit to the second node; full-duplex mode capability, the full-duplex mode capability is capable of receiving on one or more access links and / or side links concurrently with transmitting on one or more access links and / or side links.

[0081] In an example, each of the transmit multiplexing mode capability, the receive multiplexing mode capability, the transmit full-duplex mode capability, and the receive full-duplex mode capability corresponds to at least one of spatial division multiplexing (SDM), frequency division multiplexing (FDM), or a combination thereof.

[0082] In an example, each of the first node and the second node corresponds to at least one of a UE, a network entity, or a combination thereof.

[0083] In an example, the first node is the same as the second node, or the first node is different from the second node.

[0084] In one example, transmitting a capability indication message including a side link capability includes transmitting an antenna panel number, wherein the side link duplex mode capability corresponds to the antenna panel number. For example, transmitting a capability indication message including a side link capability includes: transmitting a first capability indication message including a first side link capability, and further including: after establishing a communication link, determining a capability change based on the first side link capability; and after transmitting the first capability indication message, transmitting a second capability indication message including a second side link capability based on determining the capability change, wherein the second side link capability is different from the first side link capability. In addition, the first side link capability may use a first bandwidth portion, and wherein the second side link capability may use a second bandwidth portion that is different from the first bandwidth portion.

[0085] In one example, receiving a configuration message includes: receiving a first bandwidth part identifier associated with the use of a first side link capability and a second bandwidth part identifier associated with the use of a second side link capability, wherein the first bandwidth part identifier corresponds to a first bandwidth part, and the first bandwidth part is different from the second bandwidth part identifier corresponding to the second bandwidth part; and wherein establishing a communication link includes: based on the first side link capability, using the first bandwidth part for communication; and based on the second side link capability, using the second bandwidth part for communication.

[0086] In an example, transmitting a capability indication message including a sidelink capability includes transmitting a half-duplex mode capability, and wherein establishing the communication link further includes operating, by the UE, in half-duplex mode between an access link with the network entity and a sidelink with a corresponding secondary UE.

[0087] In one example, transmitting a capability indication message including sidelink capability includes transmitting a transmit multiplexing mode capability, and wherein establishing the communication link further includes: operating by the UE in a transmit multiplexing mode to use one or more access links to transmit to one or more network entities, while concurrently being able to use a corresponding side link or corresponding multiple side links to transmit to one or more secondary UEs.

[0088] In one example, transmitting a capability indication message including sidelink capability includes transmitting receive multiplexing mode capability, and wherein establishing the communication link further includes: operating by the UE in receive multiplexing mode to receive from one or more network entities using one or more access links, while concurrently being able to receive from one or more of the secondary UEs using a corresponding side link or corresponding multiple side links.

[0089] In one example, transmitting a capability indication message including sidelink capability includes transmitting full-duplex mode capability, and wherein establishing the communication link further includes: the UE using one or more access links to transmit to one or more network entities, while concurrently being able to use a corresponding side link or corresponding multiple side links to receive from one or more of the secondary UEs.

[0090] In one example, transmitting a capability indication message including sidelink capability includes transmitting a receive full-duplex mode capability, and wherein establishing the communication link further includes: the UE using one or more access links to receive from one or more network entities, while concurrently being able to use a corresponding side link or corresponding multiple side links to transmit to one or more of the secondary UEs.

[0091] In one example, transmitting the capability indication message to the network entity further includes transmitting to the base station via an access link between the UE and the base station, wherein the base station is configured to operate as a negotiation entity for a sidelink connection by relaying at least a subset of the capability indication message to one or more secondary UEs.

[0092] In an example, transmitting the capability indication message to the network entity further includes transmitting to the one or more secondary UEs via a side link between the UE and the one or more secondary UEs.

[0093] In an example, transmitting the capability indication message further includes transmitting in at least one of: a radio resource control (RRC) message, a medium access control (MAC) control element (CE), downlink control information (DCI), sidelink control information (SCI), or a combination thereof.

[0094] In an example, the network entity corresponds to at least one of a base station or a sidelink UE.

[0095] Figure 7700 is a flow chart of a wireless communication method. The method may be performed by a network entity (e.g., network entity 102; controller / processor 375 (which may include memory 376), processor(s) 912 (which may include memory 916, modem 940), and they may be the entire network entity 102 or components of the network entity 102 (such as TX processor 368, RX processor 370 and / or transceiver 902)).

[0096] At 702, method 700 includes receiving, by a network entity, a capability indication message from a user equipment (UE), the capability indication message including a sidelink capability for direct communication between the UE and one or more secondary UEs. In one aspect, the network entity 102 and / or configuration component 199 (e.g., in conjunction with processor(s) 375 / 912, memory(s) 376 / 916, RX processor 370, and / or transceiver 902) may receive a capability indication message from a UE 104, the capability indication message including a sidelink capability for direct communication between the UE 104 and one or more secondary UEs 104.

[0097] At 704, method 700 includes transmitting, by the network entity, a configuration message to the UE in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the sidelink capability. In one aspect, the network entity 102 and / or configuration component 199 (e.g., in conjunction with processor(s) 375 / 912, memory(s) 376 / 916, TX processor 316, and / or transceiver 902) may transmit a configuration message to the UE 104 in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the sidelink capability.

[0098] At 706, method 700 includes establishing a communication link based on the one or more configuration parameters. In one aspect, network entity 102 and / or configuration component 199 (e.g., in conjunction with processor(s) 375 / 912, memory(s) 376 / 916, establishing component 241) can establish a communication link based on the one or more configuration parameters.

[0099] In an example, receiving the capability indication message including the sidelink capability includes receiving the sidelink duplex mode capability. In addition, establishing the communication link further includes operating, by the network entity, in a duplex mode corresponding to the sidelink duplex mode capability.

[0100] In one example, the receive sidelink duplex mode capability includes receiving one or any combination of the following: half-duplex mode capability for communicating between an access link with a network entity and a side link with a corresponding secondary UE; a transmit multiplexing mode capability, which is capable of using one or more access links to transmit to one or more network entities, while concurrently being capable of using a corresponding side link or corresponding multiple side links to transmit to one or more of the secondary UEs; a receive multiplexing mode capability, which is capable of using one or more access links to receive from one or more network entities, while concurrently being capable of using a corresponding side link or corresponding multiple side links to receive from one or more of the secondary UEs; a transmit full-duplex mode capability, which is capable of transmitting to a first node, while concurrently being capable of receiving from a second node; and a receive full-duplex mode capability, which is capable of receiving from a first node, while concurrently being capable of transmitting to a second node.

[0101] In an example, each of the transmit multiplexing mode capability, the receive multiplexing mode capability, the transmit full-duplex mode capability, and the receive full-duplex mode capability corresponds to at least one of spatial division multiplexing (SDM), frequency division multiplexing (FDM), or a combination thereof.

[0102] In an example, each of the first node and the second node corresponds to at least one of a UE, a network entity, or a combination thereof.

[0103] In an example, the first node is the same as the second node, or the first node is different from the second node.

[0104] In an example, receiving a capability indication message including a sidelink capability includes receiving an antenna panel number to which the sidelink duplex mode capability corresponds.

[0105] In one example, receiving a capability indication message including a side link capability includes: receiving a first capability indication message including a first side link capability, and further includes: after receiving the first capability indication message, receiving a second capability indication message including a second side link capability, wherein the second side link capability is different from the first side link capability.

[0106] In an example, the first side link capability uses a first bandwidth portion, and wherein the second side link capability uses a second bandwidth portion different from the first bandwidth portion.

[0107] In an example, receiving the capability indication message further includes receiving the capability message from the UE via an access link providing a communication link between the UE and a network entity.

[0108] In an example, method 700 may include transmitting, by the network entity, a capability indication message to one or more secondary UEs using a corresponding side link or corresponding multiple side links.

[0109] In an example, method 700 may include receiving a capability indication message, which further includes receiving in at least one of an RRC message, a MAC-CE, a DCI, an SCI, or a combination thereof.

[0110] Reference Figure 8 , an example of an implementation of UE 104 may include various components, some of which have been described above and are further described herein, including components such as one or more processors 812 and memory 816 in communication via one or more buses 844 and a transceiver 802, which may operate in conjunction with a modem 840 and / or configuration component 198 for communicating sidelink capability information.

[0111] In one aspect, the one or more processors 812 may include the modem 840 and / or may be part of the modem 840 using one or more modem processors. Thus, various functions associated with the configuration component 198 may be included in the modem 840 and / or the processor 812, and in one aspect, may be performed by a single processor, while in other aspects, different ones of these functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 812 may include any one or any combination of the following: a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or a transceiver processor associated with the transceiver 802. In other aspects, some of the features of the one or more processors 812 and / or the modem 840 associated with the configuration component 198 may be performed by the transceiver 802.

[0112] In addition, the memory 816 can be configured to store local versions of data and / or applications 875 used herein, or the communication component 842 and / or one or more subcomponents thereof executed by the at least one processor 812. The memory 816 may include any type of computer-readable medium usable by a computer or the at least one processor 812, such as a random access memory (RAM), a read-only memory (ROM), a tape, a magnetic disk, an optical disk, a volatile memory, a non-volatile memory, and any combination thereof. In one aspect, for example, when the UE 104 is operating the at least one processor 812 to execute the configuration component 198 and / or one or more subcomponents thereof, the memory 816 may be a non-transitory computer-readable storage medium storing one or more computer-executable codes defining the configuration component 198 and / or one or more subcomponents thereof and / or data associated therewith.

[0113] The transceiver 802 may include at least one receiver 806 and at least one transmitter 808. The receiver 806 may include hardware for receiving data, and / or software code executable by a processor, the code including instructions and stored in a memory (e.g., a computer-readable medium). The receiver 806 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 806 may receive signals transmitted by at least one base station 102. Additionally, the receiver 806 may process such received signals and may also obtain measurements of the signals, such as but not limited to Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc. The transmitter 808 may include hardware for transmitting data, and / or software code executable by a processor, the code including instructions and stored in a memory (e.g., a computer-readable medium). Suitable examples of the transmitter 808 may include, but are not limited to, an RF transmitter.

[0114] Also, in an aspect, the UE 104 may include an RF front end 888 that may operate in communication with the one or more antennas 865 and the transceiver 802 for receiving and transmitting radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by the UE 104. The RF front end 888 may be connected to the one or more antennas 865 and may include one or more low noise amplifiers (LNAs) 890, one or more switches 892, one or more power amplifiers (PAs) 898, and one or more filters 896 for transmitting and receiving RF signals.

[0115] In one aspect, the LNA 890 can amplify the received signal to a desired output level. In one aspect, each LNA 890 can have a specified minimum and maximum gain value. In one aspect, the RF front end 888 can use one or more switches 892 to select a particular LNA 890 and its specified gain value based on the desired gain value for a particular application.

[0116] In addition, for example, one or more PAs 898 can be used by the RF front end 888 to amplify the signal to obtain an RF output at a desired output power level. In one aspect, each PA 898 can have a specified minimum and maximum gain value. In one aspect, the RF front end 888 can use one or more switches 892 to select a particular PA 898 and its specified gain value based on the desired gain value for a particular application.

[0117] In addition, for example, one or more filters 896 can be used by the RF front end 888 to filter the received signal to obtain the input RF signal. Similarly, in one aspect, for example, a corresponding filter 896 can be used to filter the output from the corresponding PA 898 to produce an output signal for transmission. In one aspect, each filter 896 can be connected to a specific LNA 890 and / or PA 898. In one aspect, the RF front end 888 can use one or more switches 892 to select a transmit or receive path using a specified filter 896, LNA 890, and / or PA 898 based on the configuration as specified by the transceiver 802 and / or the processor 812.

[0118] As such, the transceiver 802 may be configured to transmit and receive wireless signals via the RF front end 888 through one or more antennas 865. In an aspect, the transceiver may be tuned to operate at a specified frequency so that the UE 104 may communicate, for example, with one or more base stations 102 or one or more cells associated with the one or more base stations 102. In an aspect, the modem 840 may configure the transceiver 802 to operate at a specified frequency and power level based on, for example, a UE configuration of the UE 104 and a communication protocol used by the modem 840.

[0119] In one aspect, the modem 840 can be a multi-band-multi-mode modem that can process digital data and communicate with the transceiver 802 so that the digital data is sent and received using the transceiver 802. In one aspect, the modem 840 can be multi-band and configured to support multiple frequency bands for a specific communication protocol. In one aspect, the modem 840 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 840 can control one or more components (e.g., RF front end 888, transceiver 802) of the UE 104 to achieve transmission and / or reception of signals from the network based on a specified modem configuration. In one aspect, the modem configuration can be based on the mode of the modem and the frequency band used. In another aspect, the modem configuration can be based on UE configuration information associated with the UE 104, such as provided by the network during cell selection and / or cell reselection.

[0120] In an aspect, communication component 842 can optionally include mode determination component 852. For example, upon receiving an anchor signal in the initial bandwidth portion from network entity 102, the anchor signal triggering an initial access procedure for UE 104, mode determination component 852 can determine to operate in wideband OFDM mode or wideband SC-FDM mode in response to receiving the anchor signal. Communication component 842 can then transmit a capability report message to network entity 102 based on mode determination component 852 determining whether to operate in wideband OFDM mode or wideband SC-FDM mode.

[0121] In one aspect, processor 812 may correspond to combining Figure 3 Similarly, the memory 816 may correspond to one or more of the processors described in conjunction with the UE. Figure 3 The memory described by the UE in.

[0122] Reference Fig. 9 , an example of an implementation of a base station 102 (e.g., base station 102, as described above) may include various components, some of which have been described above, but also include components such as one or more processors 912 and memory 916 in communication via one or more buses 944 and a transceiver 902, which may operate in conjunction with a modem 940 and a configuration component 199 for communicating sidelink capability information.

[0123] The transceiver 902, receiver 906, transmitter 908, one or more processors 912, memory 916, application 975, bus 944, RF front end 988, LNA 990, switch 992, filter 996, PA 998, and one or more antennas 965 may be the same or similar to the corresponding components of the UE 104 as described above, but are configured or otherwise programmed for base station operation rather than UE operation.

[0124] In one aspect, processor 912 may correspond to combining Figure 3 Similarly, the memory 916 may correspond to one or more of the processors described in the base station in FIG. Figure 3 The memory described in the base station.

[0125] It should be understood that the specific order or hierarchy of each box in the disclosed process / flowchart is an illustration of an example approach. It should be understood that the specific order or hierarchy of each box in these process / flowcharts can be rearranged based on design preferences. In addition, some boxes can be combined or omitted. The attached method claims present the elements of various boxes in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0126] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined in this article can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown in this article, but should be granted the full scope consistent with the claims in language, wherein the singular reference of the elements is not intended to represent "there is and only one", but "one or more", unless otherwise stated. The wording "exemplary" is used herein to mean "used as an example, instance or explanation". Any aspect described as "exemplary" herein does not have to be interpreted as being superior to or superior to other aspects. Unless otherwise stated, the term "some / certain" refers to one or more. Combinations such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C", and "A, B, C or any combination thereof" include any combination of A, B and / or C, and may include multiple A, multiple B or multiple C. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents of the elements of the various aspects described throughout this disclosure that are currently or hereafter known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly recorded in the claims. The terms "module," "mechanism," "element," "device," and the like may not be a substitute for the term "means." Thus, no claim element should be interpreted as a means-plus-function unless the element is explicitly stated using the phrase "means for..."

Claims

1. A method of wireless communication at a user equipment (UE), include: transmitting a capability indication message to a network entity, the capability indication message comprising a first sidelink capability for direct communication between the UE and one or more secondary UEs; receiving, from the network entity, a configuration message in response to the capability indication message, wherein the configuration message includes one or more configuration parameters regarding one or more bandwidth parts (BWPs) for sidelink communications between the UE and the one or more secondary UEs based on the first sidelink capability; In response to receiving the configuration message, establishing a communication link based on the one or more configuration parameters; after establishing the communication link, determining a capability change from the first side link capability to a second side link capability, wherein the second side link capability is different from the first side link capability; After determining the capability change, transmitting the second sidelink capability to the network entity or the one or more secondary UEs; as well as After transmitting the second side link capabilities to the network entity or the one or more secondary UEs, communicating over the communication link is continued based on the second side link capabilities.

2. The method of claim 1, further comprising: include: Determining a capability value associated with the configuration message, the capability value indicating one or more enabled configurations corresponding to the first sidelink capability, wherein establishing the communication link is further based on the one or more enabled configurations.

3. The method according to claim 1, in: Transmitting the capability indication message including the first side link capability includes transmitting a side link duplex mode capability; Wherein establishing the communication link between the UE and the one or more secondary UEs further comprises operating, by the UE, in a duplex mode corresponding to the sidelink duplex mode capability.

4. The method of claim 3, wherein transmitting the sidelink duplex mode capability comprises transmitting one or any combination of: half-duplex mode capability to communicate between an access link with the network entity and a side link with a corresponding secondary UE; a transmit multiplexing mode capability capable of transmitting to one or more network entities using one or more access links while concurrently capable of transmitting to one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links; a receive multiplexing mode capability capable of receiving from the one or more network entities using the one or more access links while concurrently being capable of receiving from one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links; Transmit full-duplex mode capability, the transmit full-duplex mode capability being capable of transmitting to a first node while concurrently being capable of receiving from a second node; as well as A receive full-duplex mode capability is capable of receiving from the first node while concurrently being capable of transmitting to the second node.

5. The method of claim 4, wherein each of the transmit multiplexing mode capability, the receive multiplexing mode capability, the transmit full-duplex mode capability, and the receive full-duplex mode capability corresponds to at least one of spatial division multiplexing (SDM), frequency division multiplexing (FDM), or a combination thereof.

6. The method of claim 4, wherein each of the first node and the second node corresponds to at least one of a UE, a network entity, or a combination thereof. The method of claim 4 , wherein the first node is the same as the second node.

8. The method of claim 4, wherein the first node is different from the second node.

9. The method of claim 1, wherein transmitting the capability indication message including the first sidelink capability comprises transmitting an antenna panel number, wherein a sidelink duplex mode capability corresponds to the antenna panel number.

10. The method of claim 1, wherein the first sidelink capability uses a first bandwidth portion, and wherein the second sidelink capability uses a second bandwidth portion different from the first bandwidth portion.

11. The method according to claim 1, in, Receiving the configuration message includes: receiving a first bandwidth portion identifier associated with use of the first side link capability and a second bandwidth portion identifier associated with use of the second side link capability, wherein the first bandwidth portion identifier corresponds to a first bandwidth portion that is different from the second bandwidth portion that corresponds to the second bandwidth portion identifier; and Wherein establishing the communication link comprises: communicating using the first bandwidth portion based on the first sidelink capability; and Based on the second sidelink capability, communicating using the second bandwidth portion.

12. The method of claim 1, wherein transmitting the capability indication message including the first side link capability comprises transmitting half-duplex mode capability, and Wherein establishing the communication link further comprises operating, by the UE, in half-duplex mode between an access link with a network entity and a side link with a corresponding secondary UE.

13. The method of claim 1 , wherein transmitting the capability indication message including the first sidelink capability comprises transmitting a transmit multiplexing mode capability, and Wherein establishing the communication link further includes operating by the UE in a transmit multiplexing mode to transmit to one or more network entities using one or more access links, while concurrently being able to transmit to one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

14. The method of claim 1, wherein transmitting the capability indication message including the first sidelink capability comprises transmitting a receive multiplexing mode capability, and Wherein establishing the communication link further includes operating the UE in a receive multiplexing mode to receive from one or more network entities using one or more access links, while concurrently being able to receive from one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

15. The method of claim 1, wherein transmitting the capability indication message including the first sidelink capability comprises transmitting a full-duplex mode capability, and Wherein establishing the communication link further comprises transmitting, by the UE, to one or more network entities using one or more access links, while concurrently being able to receive from one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

16. The method of claim 1, wherein transmitting the capability indication message including the first side link capability comprises transmitting a receive full-duplex mode capability, and Wherein establishing the communication link further comprises receiving, by the UE, from one or more network entities using one or more access links while concurrently being able to transmit to one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

17. The method of claim 1, wherein transmitting the capability indication message to the network entity further comprises: include: The transmission is made to the base station via an access link between the UE and the base station, wherein the base station is configured to operate as a negotiating entity for a sidelink connection by relaying at least a subset of the capability indication messages to the one or more secondary UEs.

18. The method of claim 1, wherein transmitting the capability indication message to the network entity further comprises: include: The transmission to the one or more secondary UEs is performed via a sidelink between the UE and the one or more secondary UEs.

19. The method of claim 1, wherein transmitting the capability indication message further comprises transmitting in at least one of: a radio resource control (RRC) message, a medium access control (MAC) control element (CE), downlink control information (DCI), sidelink control information (SCI), or a combination thereof.

20. The method of claim 1, wherein the network entity corresponds to a base station or a sidelink UE.

21. The method of claim 1, further comprising: include: Based on determining a capability change from the first sidelink capability, transmitting to the network entity a second capability indication message including the second sidelink capability.

22. An apparatus for wireless communication at a user equipment (UE), include: Transceiver; a memory configured to store instructions; as well as one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to execute the instructions to: transmitting a capability indication message to a network entity, the capability indication message comprising a first sidelink capability for direct communication between the UE and one or more secondary UEs; receiving, from the network entity, a configuration message in response to the capability indication message, wherein the configuration message includes one or more configuration parameters regarding one or more bandwidth parts (BWPs) for sidelink communications between the UE and the one or more secondary UEs based on the first sidelink capability; In response to receiving the configuration message, establishing a communication link based on the one or more configuration parameters; after establishing the communication link, determining a capability change from the first side link capability to a second side link capability, wherein the second side link capability is different from the first side link capability; After determining the capability change, transmitting the second sidelink capability to the network entity or the one or more secondary UEs; as well as After transmitting the second side link capabilities to the network entity or the one or more secondary UEs, communicating over the communication link is continued based on the second side link capabilities.

23. An apparatus as claimed in claim 22, wherein the one or more processors are further configured to execute the instructions to: determine a capability value associated with the configuration message, the capability value indicating one or more enabled configurations corresponding to the first side link capability, wherein establishing the communication link is further based on the one or more enabled configurations.

24. The device according to claim 22, in: Transmitting the capability indication message including the first side link capability includes transmitting a side link duplex mode capability; Wherein establishing the communication link between the UE and the one or more secondary UEs further comprises operating, by the UE, in a duplex mode corresponding to the sidelink duplex mode capability.

25. The apparatus of claim 24, wherein transmitting the sidelink duplex mode capability comprises transmitting one or any combination of: half-duplex mode capability to communicate between an access link with the network entity and a side link with a corresponding secondary UE; a transmit multiplexing mode capability capable of transmitting to one or more network entities using one or more access links while concurrently capable of transmitting to one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links; a receive multiplexing mode capability capable of receiving from the one or more network entities using the one or more access links while concurrently being capable of receiving from one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links; Transmit full-duplex mode capability, the transmit full-duplex mode capability being capable of transmitting to a first node while concurrently being capable of receiving from a second node; as well as A receive full-duplex mode capability is capable of receiving from the first node while concurrently being capable of transmitting to the second node.

26. The apparatus of claim 25, wherein each of the transmit multiplexing mode capability, the receive multiplexing mode capability, the transmit full-duplex mode capability, and the receive full-duplex mode capability corresponds to at least one of spatial division multiplexing (SDM), frequency division multiplexing (FDM), or a combination thereof.

27. The apparatus of claim 25, wherein each of the first node and the second node corresponds to at least one of a UE, a network entity, or a combination thereof.

28. The apparatus of claim 25, wherein the first node is the same as the second node.

29. The apparatus of claim 25, wherein the first node is different from the second node.

30. The apparatus of claim 22, wherein transmitting the capability indication message including the first sidelink capability comprises transmitting an antenna panel number, wherein a sidelink duplex mode capability corresponds to the antenna panel number.

31. The apparatus of claim 22, wherein the first side link capability uses a first bandwidth portion, and wherein the second side link capability uses a second bandwidth portion different from the first bandwidth portion.

32. The device of claim 22, in, Receiving the configuration message includes: receiving a first bandwidth portion identifier associated with use of the first side link capability and a second bandwidth portion identifier associated with use of the second side link capability, wherein the first bandwidth portion identifier corresponds to a first bandwidth portion that is different from the second bandwidth portion that corresponds to the second bandwidth portion identifier; and Wherein establishing the communication link comprises: communicating using the first bandwidth portion based on the first sidelink capability; and Based on the second sidelink capability, communicating using the second bandwidth portion.

33. The apparatus of claim 22, wherein transmitting the capability indication message including the first side link capability comprises transmitting half-duplex mode capability, and Wherein establishing the communication link further comprises operating, by the UE, in half-duplex mode between an access link with a network entity and a side link with a corresponding secondary UE.

34. The apparatus of claim 22, wherein transmitting the capability indication message including the first sidelink capability comprises transmitting a transmit multiplexing mode capability, and Wherein establishing the communication link further includes operating by the UE in a transmit multiplexing mode to transmit to one or more network entities using one or more access links, while concurrently being able to transmit to one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

35. The apparatus of claim 22, wherein transmitting the capability indication message including the first sidelink capability comprises transmitting a receive multiplexing mode capability, and Wherein establishing the communication link further includes operating the UE in a receive multiplexing mode to receive from one or more network entities using one or more access links, while concurrently being able to receive from one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

36. The apparatus of claim 22, wherein transmitting the capability indication message including the first side link capability comprises transmitting a full-duplex mode capability, and Wherein establishing the communication link further comprises transmitting, by the UE, to one or more network entities using one or more access links, while concurrently being able to receive from one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

37. The apparatus of claim 22, wherein transmitting the capability indication message including the first side link capability comprises transmitting a receive full-duplex mode capability, and Wherein establishing the communication link further comprises receiving, by the UE, from one or more network entities using one or more access links while concurrently being able to transmit to one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

38. The apparatus of claim 22, wherein transmitting the capability indication message to the network entity further comprises: include: The transmission is made to the base station via an access link between the UE and the base station, wherein the base station is configured to operate as a negotiating entity for a sidelink connection by relaying at least a subset of the capability indication messages to the one or more secondary UEs.

39. The apparatus of claim 22, wherein transmitting the capability indication message to the network entity further comprises: include: The transmission to the one or more secondary UEs is performed via a sidelink between the UE and the one or more secondary UEs.

40. The apparatus of claim 22, wherein transmitting the capability indication message further comprises transmitting in at least one of: a radio resource control (RRC) message, a medium access control (MAC) control element (CE), downlink control information (DCI), sidelink control information (SCI), or a combination thereof.

41. The apparatus of claim 22, wherein the network entity corresponds to a base station or a sidelink UE.

42. An apparatus as described in claim 22, wherein the one or more processors are further configured to execute the instructions to: based on determining a capability change from the first side link capability, transmit a second capability indication message including the second side link capability to the network entity.

43. A method of wireless communication at a network entity, include: receiving a capability indication message from a user equipment (UE), the capability indication message comprising a first sidelink capability for direct communication between the UE and one or more secondary UEs; transmitting a configuration message to the UE in response to the capability indication message, wherein the configuration message includes one or more configuration parameters regarding one or more bandwidth parts (BWPs) for sidelink communication between the UE and the one or more secondary UEs based on the first sidelink capability; in response to transmitting the configuration message, establishing a communication link based on the one or more configuration parameters; after establishing the communication link, determining a capability change from the first side link capability to a second side link capability and the second side link capability based at least in part on an update message received from the UE, wherein the second side link capability is different from the first side link capability; as well as Communicating over the communication link continues based on the second side link capability.

44. The method of claim 43, wherein receiving the capability indication message including the first sidelink capability comprises receiving a sidelink duplex mode capability; wherein establishing the communication link further include: The network entity operates in a duplex mode corresponding to the sidelink duplex mode capability.

45. The method of claim 44, wherein receiving the sidelink duplex mode capability comprises receiving one or any combination of: half-duplex mode capability to communicate between an access link with the network entity and a side link with a corresponding secondary UE; a transmit multiplexing mode capability capable of transmitting to one or more network entities using one or more access links while concurrently capable of transmitting to one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links; a receive multiplexing mode capability capable of receiving from the one or more network entities using the one or more access links while concurrently being capable of receiving from one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links; Transmit full-duplex mode capability, the transmit full-duplex mode capability being capable of transmitting to a first node while concurrently being capable of receiving from a second node; as well as A receive full-duplex mode capability is capable of receiving from the first node while concurrently being capable of transmitting to the second node.

46. ​​The method of claim 43, wherein receiving the capability indication message including the first sidelink capability comprises receiving an antenna panel number, wherein a sidelink duplex mode capability corresponds to the antenna panel number.

47. The method of claim 43, further comprising include: The capability indication message is transmitted to the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

48. The method of claim 43, wherein receiving the capability indication message further comprises: include: Receiving in a Radio Resource Control (RRC) message.

49. An apparatus for wireless communication at a network entity, include: Transceiver; a memory configured to store instructions; as well as one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to execute the instructions to: receiving a capability indication message from a user equipment (UE), the capability indication message comprising a first sidelink capability for direct communication between the UE and one or more secondary UEs; transmitting a configuration message to the UE in response to the capability indication message, wherein the configuration message includes one or more configuration parameters regarding one or more bandwidth parts (BWPs) for sidelink communication between the UE and the one or more secondary UEs based on the first sidelink capability; in response to transmitting the configuration message, establishing a communication link based on the one or more configuration parameters; after establishing the communication link, determining a capability change from the first side link capability to a second side link capability and the second side link capability based at least in part on an update message received from the UE, wherein the second side link capability is different from the first side link capability; as well as Communicating over the communication link continues based on the second side link capability.

50. The apparatus of claim 49, wherein receiving the capability indication message including the first sidelink capability comprises receiving a sidelink duplex mode capability; wherein establishing the communication link further include: The network entity operates in a duplex mode corresponding to the sidelink duplex mode capability.

51. The apparatus of claim 50, wherein receiving the sidelink duplex mode capability comprises receiving one or any combination of: half-duplex mode capability to communicate between an access link with the network entity and a side link with a corresponding secondary UE; a transmit multiplexing mode capability capable of transmitting to one or more network entities using one or more access links while concurrently capable of transmitting to one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links; a receive multiplexing mode capability capable of receiving from the one or more network entities using the one or more access links while concurrently being capable of receiving from one or more of the one or more secondary UEs using a corresponding side link or corresponding multiple side links; Transmit full-duplex mode capability, the transmit full-duplex mode capability being capable of transmitting to a first node while concurrently being capable of receiving from a second node; as well as A receive full-duplex mode capability is capable of receiving from the first node while concurrently being capable of transmitting to the second node.

52. The apparatus of claim 49, wherein receiving the capability indication message comprising the first side link capability comprises receiving an antenna panel number, wherein a side link duplex mode capability corresponds to the antenna panel number.

53. The apparatus of claim 49, wherein the one or more processors are further configured to execute the instructions to: transmit the capability indication message to the one or more secondary UEs using a corresponding side link or corresponding multiple side links.

54. The apparatus of claim 49, wherein receiving the capability indication message further comprises: include: Receiving in a Radio Resource Control (RRC) message.

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