Resource allocation for sidelink-assisted uplink transmissions

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station can select, on a sidelink of a user equipment (UE), a channel for sidelink- assisted feedback to be transmitted by the UE, where the sidelink-assisted feedback is associated with uplink control information (UCI) or aperiodic channel state information feedback; and transmit, to the UE, an indication of a resource allocation associated with the selected channel for the sidelink-assisted feedback. Numerous other aspects are provided.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 990,286, filed March 16, 2020, entitled “RESOURCE ALLOCATION FOR SIDELINK-ASSISTED UPLINK TRANSMISSION,” and U.S. Non-Provisional Patent Application No. 17 / 199,198, filed March 11, 2021, entitled “RESOURCE ALLOCATION FOR SIDELINK-ASSISTED UPLINK TRANSMISSION,” which are hereby expressly incorporated by reference.

[0003] open field

[0004] Various aspects of this disclosure generally relate to wireless communication, and to techniques and apparatus for resource allocation for sidelink-assisted uplink transmissions.

[0005] background

[0006] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). 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, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is an enhancement set of the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0007] A wireless network may include several base stations (BSs) capable of supporting communication between several user equipments (UEs). UEs can communicate with the BS via downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, while the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, the BS may be referred to as a B-node, gNB, access point (AP), radio headend, transmit / receive point (TRP), new radio (NR) BS, 5G B-node, etc.

[0008] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different user equipment to communicate at the city, country, region, and even global levels. NR (which can also be referred to as 5G) is an enhancement set of the LTE mobile standard issued by 3GPP. NR is designed to better support mobile broadband Internet access by using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) (CP-OFDM) on the downlink (DL), and using CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation to improve spectral efficiency, reduce costs, improve service, utilize new spectrum, and better integrate with other open standards. Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to grow.

[0009] Overview

[0010] In some aspects, a wireless communication method performed by a base station may include: selecting a channel on a sidelink of a user equipment (UE) for sidelink-assisted feedback to be transmitted by the UE, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; and transmitting to the UE an indication of resource allocation associated with the selected channel for the sidelink-assisted feedback.

[0011] In some aspects, a wireless communication method performed by a user equipment may include: receiving an indication of a resource allocation associated with a selected channel for sidelink-assisted feedback, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; and transmitting the sidelink-assisted feedback on the resource allocation.

[0012] In some aspects, a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: select a channel on a sidelink of a UE for sidelink-assisted feedback to be transmitted by the UE, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; and transmit to the UE an indication of resource allocation associated with the selected channel for the sidelink-assisted feedback.

[0013] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive an indication of a resource allocation associated with a selected channel for sidelink-assisted feedback, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; and transmit the sidelink-assisted feedback on the resource allocation.

[0014] In some aspects, a non-transient computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a base station, the one or more instructions may cause the processors to: select a channel on the sidelink of a UE for sidelink-assisted feedback to be transmitted by the UE, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; and transmit to the UE an indication of resource allocation associated with the selected channel for the sidelink-assisted feedback.

[0015] In some aspects, a non-transient computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of the UE, the one or more instructions may cause the processors to: receive an indication of a resource allocation associated with a selected channel for sidelink-assisted feedback, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; and transmit the sidelink-assisted feedback on the resource allocation.

[0016] In some aspects, an apparatus for wireless communication may include: means for selecting a channel on a sidelink of a UE for sidelink-assisted feedback to be transmitted by the UE, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; and means for transmitting to the UE an indication of resource allocation associated with the selected channel for the sidelink-assisted feedback.

[0017] In some aspects, an apparatus for wireless communication may include: means for receiving an indication of a resource allocation associated with a selected channel for sidelink-assisted feedback, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; and means for transmitting the sidelink-assisted feedback over the resource allocation.

[0018] The aspects generally include, as substantially described herein with reference to the accompanying drawings and explained as illustrated in the drawings, methods, apparatus (equipment), systems, computer program products, non-transient computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems.

[0019] The foregoing has broadly outlined the features and technical advantages of the examples according to this disclosure in an effort to facilitate a better understanding of the following detailed description. Additional features and advantages will be described thereafter. The disclosed concepts and specific examples can be readily used as the basis for modifications or the design of other structures for implementing the same purposes as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, in both their organization and manner of operation, and their associated advantages, will be better understood by considering the following description in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and not for defining limitations on the claims.

[0020] While aspects are described herein by way of example, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects may be implemented via integrated chip embodiments or other devices based on non-modular components (e.g., end-user equipment, vehicles, communication equipment, computing devices, industrial equipment, retail / shopping equipment, medical devices, or AI-enabled devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. Devices incorporating the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include several components (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or summers) for analog and digital purposes. The aspects described herein are intended to be practiced in a wide variety of devices, components, systems, distributed arrangements, or end-user equipment of various sizes, shapes, and configurations. Brief description of the attached diagram

[0022] To gain a more detailed understanding of the features described above in this disclosure, reference can be made to various aspects of the above brief overview, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should not be considered as limiting its scope, as other equivalent aspects are permissible in this description. Identical reference numerals in different drawings may identify the same or similar elements.

[0023] Figure 1 This is a diagram illustrating an example of a wireless network according to this disclosure.

[0024] Figure 2 This is a diagram illustrating an example of communication between a base station and a UE in a wireless network according to this disclosure.

[0025] Figure 3This is a diagram illustrating an example of sidelink communication according to this disclosure.

[0026] Figure 4 This is a diagram illustrating examples of sidelink communication and access link communication according to this disclosure.

[0027] Figure 5 This is a diagram illustrating an example of two-stage sidelink control information according to this disclosure.

[0028] Figure 6 This is a diagram illustrating an example of link selection for resource allocation for sidelink-assisted uplink transmission according to this disclosure.

[0029] Figure 7 This is a diagram illustrating an example process performed by a base station according to this disclosure.

[0030] Figure 8 This is a diagram illustrating an example procedure performed by a UE according to this disclosure.

[0031] Detailed description

[0032] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be implemented in many different forms and should not be construed as being limited to any specific structure or function given throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or method of practice. Furthermore, the scope of this disclosure is intended to cover such apparatus or methods practiced using additional structures, functionalities, or structures and functionalities that complement or supplement the various aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be implemented by one or more elements of the claims.

[0033] Several aspects of a telecommunications system will now be described with reference to various devices and technologies. These devices and technologies will be described in the following detailed description and explained in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, "elements"). These elements can be implemented using hardware, software, or a 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.

[0034] It should be noted that although the aspects are described herein using terms commonly associated with 5G or NR radio access technology (RAT), the aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0035] Figure 1 This is a diagram illustrating an example of a wireless network 100 according to this disclosure. The wireless network 100 may be a 5G (NR) network and / or an LTE network, etc., or may include elements thereof. The wireless network 100 may include several base stations 110 (shown as BS110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, B-node, gNB, 5G B-node (NB), access point, transmit / receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0036] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. Macrocells can cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs with a service subscription. Picocells can cover a relatively small geographic area and allow unrestricted access by UEs with a service subscription. Femtocells can cover a relatively small geographic area (e.g., a residential area) and allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG)). A BS used for macrocells may be referred to as a macro BS. A BS used for picocells may be referred to as a pico BS. A BS used for femtocells may be referred to as a femto BS or a home BS. Figure 1 In the example shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “B node,” “5G NB,” and “cell” are used interchangeably herein.

[0037] In some respects, the cell may not be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some respects, BSs may interconnect with each other and / or interconnect to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections or virtual networks, using any suitable transport network).

[0038] The wireless network 100 may also include a relay station. A relay station is an entity capable of receiving data transmissions from an upstream station (e.g., a BS or a UE) and transmitting those data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying transmissions for other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, relay, etc.

[0039] Wireless network 100 can be a heterogeneous network comprising different types of Base Stations (BSs) such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs may have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0040] Network controller 130 can be coupled to a set of Base Stations (BSs) and can provide coordination and control over these BSs. Network controller 130 can communicate with each BS via backhaul. These BSs can also communicate with each other directly or indirectly via wireless or wired backhaul.

[0041] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE may be a cellular phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet, camera, gaming device, netbook, smartbook, ultrabook, medical device or equipment, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), entertainment device (e.g., music or video device, or satellite radio), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0042] Some UEs may be considered Machine-Type Communication (MTC) UEs, or evolved or enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, instruments, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes may provide connectivity to or to a network (e.g., a wide area network such as the Internet) or a cellular network, for example, via wired or wireless communication links. Some UEs may be considered Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs may be considered Customer Premises Equipment (CPE). UE120 may be included within a housing that houses components of UE120, such as processor components and / or memory components. In some aspects, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0043] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0044] In some respects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), and / or mesh networks. In this scenario, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0045] In some aspects, a first UE 120 (e.g., UE 120a) can provide relay services to a second UE (e.g., UE 120e) via a sidelink. For example, sidelink communication can occur between a remote UE 120 (e.g., UE 120e) and a relay UE 120 (e.g., UE 120a) for data transmission to or from BS 110. In some aspects, the remote UE 120 can be outside the coverage area of ​​the radio access network, preventing the remote UE 120 from communicating directly with BS 110. In such cases, a relay can be deployed to extend network coverage. In some aspects, the remote UE 120 can be within the coverage area of ​​BS 110. In such cases, the relay UE 120 can improve the performance and network capacity of the remote UE 120 by enabling the remote UE to perform sidelink and radio access (e.g., uplink / downlink) communications.

[0046] Devices in the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices in the wireless network 100 can communicate using an operating band with a first frequency range (FR1) and / or an operating band with a second frequency range (FR2), where the first frequency range (FR1) spans from 410 MHz to 7.125 GHz and the second frequency range (FR2) spans from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as intermediate frequency (IF) bands. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as the "sub-6 GHz" band. Similarly, although distinct from the Extremely High Frequency (EHF) band (30 GHz–300 GHz) designated as the "millimeter wave" band by the International Telecommunication Union (ITU), FR2 is often referred to as the "millimeter wave" band. Therefore, unless otherwise stated, it should be understood that, if used herein, the terms "sub-6 GHz" and the like can broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or intermediate frequency band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise stated, it should be understood that, if used herein, the terms "millimeter wave" and the like can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequency band frequencies (e.g., less than 24.25 GHz). It is conceivable that the frequencies included in FR1 and FR2 can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0047] As indicated above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 The example described.

[0048] Figure 2 This is a diagram illustrating an example 200 of communication between a base station 110 and a UE 120 in a wireless network 100 according to this disclosure. The base station 110 may be equipped with T antennas 234a to 234t, while the UE 120 may be equipped with R antennas 252a to 252r, wherein generally T≥1 and R≥1.

[0049] At base station 110, transmit processor 220 can receive data destined for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQI) received from each UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. Transmit processor 220 can also process system information (e.g., semi-static resource allocation information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling), and provide overhead symbols and control symbols. Transmit processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can process its respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t, respectively.

[0050] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM) to obtain received symbols. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on these received symbols where applicable, and provide detected symbols. Receiver processor 258 can process (e.g., demodulate and decode) these detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine parameters such as Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), and / or Channel Quality Indicator (CQI). In some respects, one or more components of the UE 120 may be included in the housing.

[0051] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in the core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0052] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included within one or more antenna panels, antenna groups, antenna element assemblies, and / or antenna arrays. Antenna panels, antenna groups, antenna element assemblies, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element assemblies, and / or antenna arrays may include coplanar antenna element assemblies and / or non-coplanar antenna element assemblies. Antenna panels, antenna groups, antenna element assemblies, and / or antenna arrays may include antenna elements within a single housing and / or multiple antenna elements within housings. Antenna panels, antenna groups, antenna element assemblies, and / or antenna arrays may include elements coupled to one or more transmission and / or reception components (such as...). Figure 2 One or more antenna elements (one or more components).

[0053] On the uplink, at UE 120, transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., reports including RSRP, RSSI, RSRQ, and / or CQI). Transmit processor 264 can also generate reference symbols for one or more reference signals. Symbols from transmit processor 264 can be pre-encoded by TX MIMO processor 266, where applicable, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, modulators and demodulators (e.g., MOD / DEMOD 254) of UE 120 may be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antennas 252, modulators and / or demodulators 254, MIMO detectors 256, receiver processors 258, transmitter processors 264, and / or TX MIMO processors 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (e.g., as referenced). Figure 3-8 (As described).

[0054] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 where applicable, and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 for downlink and / or uplink communications. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, base station 110 includes a transceiver. The transceiver may include (e.g.) antenna 234, modulator and / or demodulator 232, MIMO detector 236, receiver processor 238, transmitter processor 220, and / or any combination of TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (e.g., as referenced). Figure 3-8 (As described).

[0055] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component may perform one or more techniques associated with resource allocation for sidelink-assisted uplink feedback, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component that can execute or direct, for example Figure 7 Process 700 Figure 8 The operation of process 800 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120 (e.g., direct execution, or execution after compilation, transformation, and / or interpretation), the one or more processors, UE 120, and / or base station 110 may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 7 Process 700 Figure 8 The operation of process 800, and / or other processes described herein. In some respects, the execution instructions may include run instructions, translate instructions, compile instructions, and / or interpret instructions, etc.

[0056] In some aspects, UE 120 may include: means for receiving an indication of a resource allocation associated with a selected channel for sidelink-assisted feedback, wherein the sidelink-assisted feedback is associated with uplink control information (UCI) or aperiodic channel state information feedback; means for transmitting the sidelink-assisted feedback on the resource allocation; means for transmitting the sidelink-assisted feedback using media access control signaling; means for transmitting the sidelink-assisted feedback using sidelink control information; means for identifying physical sidelink feedback channel resources, etc. In some aspects, such means may include combinations of... Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0057] In some aspects, base station 110 may include: means for selecting a channel on a sidelink of the UE for sidelink-assisted feedback to be transmitted by the UE, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback; means for transmitting to the UE an indication of resource allocation associated with the selected channel for the sidelink-assisted feedback; means for receiving the sidelink-assisted feedback using media access control signaling; means for receiving the sidelink-assisted feedback using sidelink control information; means for identifying physical sidelink feedback channel resources, etc. In some aspects, such means may include a combination of Figure 2 One or more components of the described base station 110, such as antenna 234, DEMOD 232, MIMO detector 236, receiver processor 238, controller / processor 240, transmitter processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.

[0058] although Figure 2 The boxes in the diagram are interpreted as different components, but the functions described above with respect to these boxes can be implemented using a single hardware component, software component, or combination of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by controller / processor 280 or under the control of controller / processor 280.

[0059] As indicated above, Figure 2 This is provided as an example. Other examples may differ from the one provided. Figure 2 The example described.

[0060] Figure 3 This is a diagram illustrating example 300 of sidelink communication according to this disclosure.

[0061] like Figure 3As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. UE 305-1 and UE 305-2 can use one or more sidelink channels 310 to communicate for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, vehicle-to-pedestrian (V2P) communication, mesh networking, etc.), etc. In some aspects, UE 305 (e.g., UE 305-1 and / or UE 305-2) may correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, one or more sidelink channels 310 may use a ProSe sidelink (PC5) interface and / or may operate in a high-frequency band (e.g., the 5.9 GHz band). Additionally or alternatively, UE 305 may use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, symbols, etc.).

[0062] As in Figure 3 As further shown, the one or more sidelink channels 310 may include a Physical Sidelink Control Channel (PSCCH) 315, a Physical Sidelink Shared Channel (PSSCH) 320, and / or a Physical Sidelink Feedback Channel (PSFCH) 325. PSCCH 315 may be used to convey control information, similar to a Physical Downlink Control Channel (PDCCH) and / or a Physical Uplink Control Channel (PUCCH) for cellular communication with base station 110 via an access link or access channel. PSSCH 320 may be used to convey data, similar to a Physical Downlink Shared Channel (PDSCH) and / or a Physical Uplink Shared Channel (PUSCH) for cellular communication with base station 110 via an access link or access channel. For example, PSCCH 315 may carry Sidelink Control Information (SCI) 330, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, spatial resources, etc.), wherein a Transport Block (TB) 335 may be carried on PSSCH 320. TB 335 may include data. PSFCH 325 may be used to convey sidelink feedback 340, such as Hybrid Automatic Repeat Request (HARQ) feedback (e.g., ACK / NACK information), Transmit Power Control (TPC), Scheduling Request (SR), and so on. In some aspects, the Physical Sidelink Broadcast Channel (PSBCH) may be used to broadcast information on the sidelink. One or more of these sidelink channels may be selected and used to transmit sidelink-assisted feedback, as described elsewhere herein.

[0063] In some respects, one or more sidelink channels 310 may use a resource pool. For example, specific resource blocks (RBs) may be used across time to transmit scheduling assignments in subchannels (e.g., included in SCI 330). Sidelink communication occurs within the resource pool. Resource pools for transmission and reception can be defined. A resource pool may include subchannels in frequency and time slots in time. The smallest unit of resource allocation is a subchannel in frequency, and the unit of resource allocation in time is a time slot. Some time slots may not be available for sidelinks. As described elsewhere herein, a subset of the resource pool may be associated with sidelink-assisted feedback transmissions, and resources within the subset of the resource pool may be used to transmit sidelink-assisted feedback.

[0064] In some respects, data transmissions associated with a scheduling assignment (e.g., on PSSCH 320) may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In other respects, the scheduling assignment and associated data transmissions are not transmitted on adjacent RBs.

[0065] In some aspects, UE 305 may operate using a transmission mode in which resource selection and / or scheduling is performed by UE 305 (e.g., instead of base station 110). In some aspects, UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmission. For example, UE 305 may measure Received Signal Strength Indicator (RSSI) parameters (e.g., sidelink-RSSI (S-RSSI) parameters) associated with various sidelink channels; may measure Reference Signal Received Power (RSRP) parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels; may measure Reference Signal Received Quality (RSRQ) parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, etc.; and may select channels for transmitting sidelink communications based at least in part on (these) measurements.

[0066] Alternatively or concurrently, UE 305 may use SCI 330 received in PSCCH 315 (which may indicate the resources used, channel parameters, etc.) to perform resource selection and / or scheduling. Alternatively or concurrently, UE 305 may perform resource selection and / or scheduling by determining the Channel Busy Rate (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating the maximum number of resource blocks available to UE 305 for a particular subframe set).

[0067] In a transmission mode where resource selection and / or scheduling is performed by UE 305, UE 305 may generate sidelink grants, and these grants may be transmitted in SCI 330. Sidelink grants may indicate one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks (e.g., for TB335) to be used for an upcoming sidelink transmission on PSSCH 320, one or more subframes to be used for an upcoming sidelink transmission, modulation and coding scheme (MCS) to be used for an upcoming sidelink transmission, etc. In some aspects, UE 305 may generate sidelink grants indicating one or more parameters for semi-persistent scheduling (SPS), such as the periodicity of sidelink transmissions. Additionally or alternatively, UE 305 may generate sidelink grants for event-driven scheduling (such as for on-demand sidelink messages).

[0068] As indicated above, Figure 3 This is provided as an example. Other examples may differ from the one provided. Figure 3 The example described.

[0069] Figure 4 This is a diagram illustrating example 400 of sidelink communication and access link communication according to this disclosure.

[0070] like Figure 4 As shown, the transmitting (Tx) UE 405 and the receiving (Rx) UE 410 can communicate with each other via a side link, as described above. Figure 3 As described. As further shown, in some sidelink modes, base station 110 may communicate with Tx UE 405 via a first access link. Additionally or alternatively, in some sidelink modes, base station 110 may communicate with Rx UE 410 via a second access link. Tx UE 405 and / or Rx UE 410 may correspond to one or more UEs described elsewhere herein, such as Figure 1 UE120. Therefore, a sidelink can refer to a direct link between UEs 120, and an access link can refer to a direct link between base station 110 and UE120. Sidelink communication can be transmitted via the sidelink, and access link communication can be transmitted via the access link. Access link communication can be downlink communication (from base station 110 to UE120) or uplink communication (from UE120 to base station 110). In some aspects, access link communication (e.g., uplink communication) can be transmitted as sidelink communication on a selected channel of the sidelink, as described elsewhere herein. Such transmissions can be referred to as sidelink-assisted feedback.

[0071] As indicated above, Figure 4 This is provided as an example. Other examples may differ from the one provided. Figure 4 The example described.

[0072] Figure 5 This is a diagram illustrating example 500 of a two-stage sidelink control information (SCI) according to this disclosure. The SCI can be provided in a first stage and a second stage, as indicated by reference numerals 510 and 520. The first stage may be referred to as SCI-1, and the second stage may be referred to as SCI-2. SCI-1 can be transmitted on the PSCCH. SCI-1 may include resource allocation, as indicated by reference numeral 530, and may include information for decoding SCI-2 (e.g., the format and / or other information of SCI-2). Resource allocation may indicate resources for SCI-2 and / or the shared channel (SCH) indicated by reference numeral 540. SCI-2 can be transmitted on the PSSCH. SCI-2 may include information for decoding the SCH. SCI-1 and / or SCI-2 can be encoded and / or decoded using a physical downlink control channel (PDCCH) polarity decoding / decoding chain.

[0073] In some respects, SCI-2 can be mapped to a contiguous resource block (RB) in the PSSCH that begins with the first symbol having the PSSCH demodulation reference signal (DMRS). In some respects, SCI-2 can be scrambled separately from the SCH. In some respects, quadrature phase shift keying (QPSK) can be used to modulate SCI-2. Since the format of SCI-2 can be indicated by SCI-1, the receiver of SCI-2 can avoid performing blind decoding of SCI-2, thereby saving computational resources.

[0074] As indicated above, Figure 5 This is provided as an example. Other examples may differ from the one provided. Figure 5 The example described.

[0075] A remote UE can utilize the service of a relay UE to relay communication between the remote UE and the BS. This can be beneficial in situations where the remote UE has limited coverage or where the remote UE is covered by the BS's radio access network (e.g., where the remote UE has a Uu link with the BS). For example, if the Uu link is congested, multiple sidelink communications between the remote UE and the associated relay UE can be scheduled. Assuming these multiple sidelink communications do not interfere with each other, network capacity can be increased. Furthermore, in terms of power consumption, since the relay UE is expected to be closer to the remote UE than the BS, it may be more desirable for uplink transmissions to be relayed to the BS (because transmissions from the remote UE to the relay UE can use less power than transmissions from the remote UE to the BS). For example, the amount of power required per channel may depend on the target block error rate (BLER), payload, and code rate. Generally, transmitting larger packets (such as the uplink shared channel (UL-SCH) on PUSCH) requires more power than transmitting smaller packets (such as the set of bits for Hybrid Automatic Repeat Request (HARQ) acknowledgments (ACK) on PUCCH).

[0076] In some situations, sidelink transmissions can be used to assist uplink feedback transmissions. This can be referred to as sidelink-assisted uplink feedback or simply sidelink-assisted feedback. Sidelink-assisted uplink feedback can improve the robustness of such feedback and reduce the use of remote UE resources associated with transmitting uplink feedback at higher transmit power. In some cases, the sidelink resources and / or channels to be used for sidelink-assisted feedback may be ambiguous. For example, a relay UE relaying sidelink-assisted feedback may or may not know the sidelink resources and / or channels to be used for sidelink-assisted feedback. As another example, the size of the sidelink-assisted feedback may mean that certain channels are more suitable or easier to use for transmitting sidelink-assisted feedback than others.

[0077] Some of the techniques and apparatus described herein provide for selecting a channel on a sidelink of a remote UE for transmission of sidelink-assisted feedback by the remote UE. For example, a base station can select a channel and can provide an indication of the resources associated with the channel to be used for transmitting sidelink-assisted feedback. These resources can be indicated implicitly (e.g., relative to another channel or another transmission for the remote UE) or explicitly (e.g., in scheduling information, control information, or other form of signaling transmitted to the remote UE). Therefore, ambiguity in resource allocation for sidelink-assisted feedback transmission can be reduced. Furthermore, network performance is improved by successfully utilizing the sidelink between the remote UE and the relay UE. Moreover, selecting an appropriate channel for sidelink-assisted feedback improves the efficiency and performance of the sidelink.

[0078] Figure 6 This is a diagram illustrating example 600 of link selection for resource allocation for sidelink-assisted uplink transmission according to this disclosure. As shown, example 600 includes a remote UE 120 (e.g., UE 305, UE 405, UE 410), a relay UE 120 (e.g., UE 305, UE 405, UE 410), and a BS 110.

[0079] like Figure 6 As shown by reference numeral 610 in the accompanying drawings, BS 110 can select a channel for sidelink-assisted feedback on the sidelink of remote UE 120 (e.g., the sidelink between remote UE 120 and relay UE 120). This channel can be a physical channel on the sidelink between remote UE 120 and relay UE 120, such as PSSCH, PSCCH, PSFCH, etc. In some aspects, BS 110 can select the channel based at least in part on the communication type of the sidelink-assisted feedback (e.g., UCI, Channel State Information (CSI) feedback, scheduling request, etc.), the payload size of the sidelink-assisted feedback, and the resource availability on one or more selectable channels. In some aspects, the channel selection can be implicit. For example, the channel to be selected can be specified in the wireless telecommunications standard based at least in part on the conditions at BS 110 or one of the UEs 120. Sidelink-assisted feedback may include, for example, UCI, uplink data, A-CSI reports, scheduling requests (SR), etc. SR is a request for uplink resources (such as uplink grant) to enable the remote UE 120 to transmit communication on the uplink.

[0080] In some aspects, BS 110 may select PSSCH as the selected channel. In this case, PSSCH resources can be used to transmit sidelink-assisted feedback. UCIs to be transmitted on the PSSCH can be transmitted using Media Access Control (MAC) Control Elements (CEs) on the PSSCH resources (such as MAC-CEs carried by the PSSCH). In some aspects, BS 110 may select SCI (e.g., SCI-2) as the selected channel. For example, SCI-1 may indicate a specific format for SCI-2. This specific format may be associated with carrying UCIs (e.g., sidelink-assisted feedback) associated with the Uu link (e.g., configured to carry UCIs associated with the Uu link). The Uu link may be referred to herein as the access link between the UE and the BS. In this case, the remote UE 120 may not transmit PSSCH, or may transmit PSSCH with Media Access Control (MAC) Protocol Data Units (PDUs) including all zeros or excluding useful content.

[0081] In some respects, BS 110 can select PSSCH as the selected channel. This may be particularly beneficial if the relay UE 120 has information indicating which resources on the sidelink will be used by the remote UE 120. Selecting PSFCH may be beneficial for smaller payload sizes, while selecting PSSCH or SCI-2 may be more beneficial for larger payload sizes. Furthermore, selecting PSSCH or SCI-2 may be beneficial if the relay UE 120 does not have information indicating the sidelink resource allocation for the remote UE 120. For example, if the relay UE 120 does not have access to the sidelink resource allocation for the remote UE 120, the relay UE 120 can monitor all PSCCH / PSSCH on the resource pool set.

[0082] As shown by reference numeral 620 in the accompanying drawings, BS 110 can (e.g., via the Uu interface or via relay UE 120) provide remote UE 120 with an indication of resource allocation associated with the selected channel. In some aspects, BS 110 can explicitly indicate the selected channel to remote UE 120. In other aspects, BS 110 can implicitly indicate the selected channel to remote UE 120 (e.g., at least in part based on resource allocation associated with the selected channel).

[0083] In some respects, the indication of resource allocation can be implicit. As an example, the first configured timing for sidelink transmission may be used after a PDCCH (or a control resource set (CORESET) including the PDCCH) or PDSCH carrying indications and / or scheduling sidelink-assisted feedback. The gap between the PDCCH / CORESET / PDSCH and the timing for sidelink transmission may take into account the minimum processing timeline capability of the remote UE 120. In this case, both time-domain resources, or time-domain resources and frequency resources (e.g., one or more sub-channels), may be configured for this purpose for the set of remote UEs 120 associated with the relay UE 120. Implicit indication may also be used if the PSFCH is used as a channel carrying sidelink-assisted feedback.

[0084] In some aspects, the indication may include downlink control information (DCI). For example, the DCI may indicate resource allocation. In some aspects, the DCI may be associated with a format used to indicate a link from a sidelink or uplink used for sidelink-assisted feedback. For example, the format may be specifically designed to indicate a link used for sidelink-assisted feedback (e.g., an uplink to BS 110 or a sidelink via relay UE 120). In some aspects, the DCI may indicate time resources to be used (e.g., the time slot between the DCI and resource allocation) and frequency resources (e.g., one or more sub-channels). In some aspects, the DCI may indicate time resources and may semi-statically indicate or determine frequency resources. In some aspects, frequency resources may be at least partially based on time resources used for sidelink-assisted feedback or the time slot in which the indication (e.g., the DCI) is received. In some aspects, the indication may indicate sub-channels carrying the PSCCH and time slots, and the number of sub-channels used for PSSCH transmission and the offset relative to the PSCCH can be configured. In some aspects, the time slots used to determine time resources can be configured. In some respects, when the selected channel is PSFCH, this indication can provide information about PSFCH resources and the format used for PSFCH (e.g., the cyclic shift to be used, etc.).

[0085] In some respects, when the selected channel is PSFCH, the remote UE 120 can determine resource allocation at least partially based on a mapping. In such cases, the BS 110 may not transmit an indication to the remote UE 120, or the indication transmitted to the UE 120 may not indicate resource allocation. For example, the remote UE 120 may store information indicating a mapping between uplink resources and PSFCH resources. This mapping may be based at least partially on relationships between two or more of the following: time slots or sub-time slots for PUCCH, PUCCH resource sets, PUCCH format, timing parameters (e.g., K0, K1, K2, etc.), time slots for PSFCH, and / or sub-channels. This relationship can be configured for the remote UE 120 as part of its PUCCH configuration. The remote UE 120 can identify resource allocation for PSFCH by referring to the PUCCH associated with sidelink-assisted feedback and this relationship. This can save signaling resources that would otherwise be used to dynamically signal indications.

[0086] In some respects, the sidelink between the remote UE 120 and the relay UE 120 can be associated with multiple resource pools. A subset of resources from these multiple resource pools (e.g., an appropriate subset) can be configured to transmit sidelink-assisted feedback. Within this resource pool subset, subsets of time-domain and frequency-domain resources can be configured to be valid for transmitting sidelink-assisted feedback. Therefore, the indicated resource (as described above) can point to one or more valid resources. This reduces the complexity of signaling resource allocation, thereby saving air interface and computational resources for both the remote UE 120 and BS 110.

[0087] As shown by reference numeral 630 in the attached figure, the remote UE 120 can provide sidelink-assisted feedback to the relay UE 120 on a selected channel. The relay UE 120 can relay this sidelink-assisted feedback to the BS 110. Therefore, the BS 110 can select a channel and / or determine the resource allocation for sidelink-assisted feedback on the selected channel. The remote UE 120 can use the selected channel to provide sidelink-assisted feedback to the BS 110 via the relay UE 120. In this way, the reliability of sidelink-assisted feedback is improved, signaling overhead is reduced, and network performance is improved.

[0088] As indicated above, Figure 6 This is provided as an example. Other examples may differ from the one provided. Figure 6 The example described.

[0089] Figure 7 This is a diagram illustrating an example process 700 performed by a base station according to this disclosure. Example process 700 is an example of an operation performed by a base station (e.g., BS 110, etc.) associated with resource allocation for sidelink-assisted uplink transmission.

[0090] like Figure 7 As shown, in some aspects, process 700 may include selecting a channel on the sidelink of a user equipment (UE) for sidelink-assisted feedback to be transmitted by the UE, wherein the sidelink-assisted feedback is associated with uplink control information (UCI), aperiodic channel state information feedback, or a scheduling request (block 710). For example, a base station (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.) may select a channel on the sidelink of a UE (e.g., remote UE 120) for sidelink-assisted feedback to be transmitted by the UE, as described above. In some aspects, the sidelink-assisted feedback is associated with UCI, aperiodic channel state information feedback, or a scheduling request.

[0091] like Figure 7As further shown, in some aspects, process 700 may include transmitting to the UE an indication of resource allocation associated with a selected channel for the sidelink-assisted feedback (block 720). For example, a base station (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) may transmit to the UE an indication of resource allocation associated with a selected channel for the sidelink-assisted feedback, as described above.

[0092] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0093] In the first aspect, the selected channel is a physical sidelink shared channel, and the method further includes: using media access control signaling to receive sidelink-assisted feedback.

[0094] In a second aspect, either alone or in combination with the first aspect, the method further includes: using sidelink control information to receive sidelink-assisted feedback.

[0095] In the third aspect, either alone or in combination with one or more of the first and second aspects, the sidelink control information uses a format associated with carrying the UCI on the access link between the UE and the base station.

[0096] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the selected channel is a physical side link feedback channel.

[0097] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the physical sidelink feedback channel resources used for transmitting sidelink-assisted feedback are at least partially based on uplink resources associated with the payload of the sidelink-assisted feedback.

[0098] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, process 700 includes identifying physical sidelink feedback channel resources based at least in part on at least the following: time slots or sub-time slots associated with uplink resources, resource sets associated with uplink resources, uplink resources, physical uplink control channel formats associated with payloads, timing parameters of sidelink auxiliary feedback or payloads, time slots or frequency resources of physical sidelink feedback channel resources, or combinations thereof.

[0099] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the physical side link feedback channel resources are identified as being based at least in part on the physical uplink control channel configuration associated with the payload.

[0100] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the indication of resource allocation is based at least in part on resources associated with a physical downlink control channel, a control resource set, or a physical downlink shared channel, and the gap between such resources and resource allocation.

[0101] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the gap between the resource and the resource allocation is based at least in part on the minimum processing time of the UE.

[0102] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the resource allocation is at least in part based on the UE being a remote UE on a side link and dedicated to that UE.

[0103] In the eleventh aspect, instructions for resource allocation are transmitted via downlink control information (DCI), either alone or in combination with one or more of the first to tenth aspects.

[0104] In the twelfth aspect, DCI is associated with the selection of a link for side-link auxiliary feedback, either alone or in combination with one or more of the first to eleventh aspects.

[0105] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, DCI indicates the time and frequency resources used for side-link assisted feedback.

[0106] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the DCI indicates the time resources used for side-link auxiliary feedback, and the frequency resources used for side-link auxiliary feedback are indicated semi-statically.

[0107] In the fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, the DCI indicates the time resources for sidelink-assisted feedback, and the frequency resources for sidelink-assisted feedback are based at least in part on at least the time resources, the time slots associated with the DCI, or a combination thereof.

[0108] In the sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the DCI indicates the frequency resources used for sidelink-assisted feedback and the time intervals used to determine the time resources used for sidelink-assisted feedback.

[0109] In the seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the DCI indicates the physical sidelink feedback channel resources and physical sidelink feedback channel format for sidelink-assisted feedback.

[0110] In the eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, the resource allocation associated with the selected channel for sidelink-assisted feedback is selected from a resource pool associated with the sidelink-assisted feedback, which is included in a set of resource pools associated with the sidelink-assisted feedback.

[0111] In the nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the resource allocation associated with the selected channel for sidelink-assisted feedback is selected from an appropriate subset of the resource pool associated with the sidelink-assisted feedback.

[0112] In the twentieth aspect, either alone or in combination with one or more of the first to nineteenth aspects, an indication of resource allocation associated with a selected channel for sidelink-assisted feedback indicates the resources in the resource pool associated with the sidelink-assisted feedback for that sidelink-assisted feedback.

[0113] although Figure 7 An example box of process 700 is shown, but in some respects, process 700 may include... Figure 7 The boxes depicted in the process are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Additionally or alternatively, two or more boxes in process 700 can be executed in parallel.

[0114] Figure 8 This is a diagram illustrating an example procedure 800 performed by a UE according to this disclosure. Example procedure 800 is an example of an operation performed by a UE (e.g., remote UE 120, UE 305, etc.) associated with resource allocation for sidelink-assisted uplink transmission.

[0115] like Figure 8 As shown, in some aspects, process 800 may include receiving an indication of resource allocation associated with a selected channel for sidelink-assisted feedback, wherein the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback (block 810). For example, the UE may (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) receive an indication of resource allocation associated with a selected channel for sidelink-assisted feedback, as described above. In some aspects, the sidelink-assisted feedback is associated with UCI or aperiodic channel state information feedback.

[0116] like Figure 8As further shown, in some aspects, process 800 may include transmitting the sidelink-assisted feedback on the resource allocation (block 820). For example, the UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may transmit the sidelink-assisted feedback on the resource allocation as described above.

[0117] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0118] In the first aspect, the selected channel is a physical sidelink shared channel, and the method further includes: using media access control signaling to transmit sidelink-assisted feedback.

[0119] In a second aspect, either alone or in combination with the first aspect, the method further includes: using sidelink control information to transmit sidelink-assisted feedback.

[0120] In the third aspect, either alone or in combination with one or more of the first and second aspects, the sidelink control information uses a format associated with carrying the UCI on the access link between the UE and the base station.

[0121] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the selected channel is a physical side link feedback channel.

[0122] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the physical sidelink feedback channel resources used for transmitting sidelink-assisted feedback are at least partially based on uplink resources associated with the payload of the sidelink-assisted feedback.

[0123] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, process 800 includes identifying physical sidelink feedback channel resources based at least in part on at least the following: time slots or sub-time slots associated with uplink resources, resource sets associated with uplink resources, uplink resources, physical uplink control channel formats associated with payloads, timing parameters of sidelink auxiliary feedback or payloads, time slots or frequency resources of physical sidelink feedback channel resources, or combinations thereof.

[0124] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the physical side link feedback channel resources are identified as being based at least in part on the physical uplink control channel configuration associated with the payload.

[0125] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the indication of resource allocation is based at least in part on resources associated with a physical downlink control channel, a control resource set, or a physical downlink shared channel, and the gap between such resources and resource allocation.

[0126] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the gap between the resource and the resource allocation is based at least in part on the minimum processing time of the UE.

[0127] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the resource allocation is at least in part based on the UE being a remote UE on a side link and dedicated to that UE.

[0128] In the eleventh aspect, instructions for resource allocation are transmitted via downlink control information (DCI), either alone or in combination with one or more of the first to tenth aspects.

[0129] In the twelfth aspect, DCI is associated with the selection of a link for side-link auxiliary feedback, either alone or in combination with one or more of the first to eleventh aspects.

[0130] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, DCI indicates the time and frequency resources used for side-link assisted feedback.

[0131] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the DCI indicates the time resources used for side-link auxiliary feedback, and the frequency resources used for side-link auxiliary feedback are indicated semi-statically.

[0132] In the fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, the DCI indicates the time resources for sidelink-assisted feedback, and the frequency resources for sidelink-assisted feedback are based at least in part on at least the time resources, the time slots associated with the DCI, or a combination thereof.

[0133] In the sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the DCI indicates the frequency resources used for sidelink-assisted feedback and the time intervals used to determine the time resources used for sidelink-assisted feedback.

[0134] In the seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the DCI indicates the physical sidelink feedback channel resources and physical sidelink feedback channel format for sidelink-assisted feedback.

[0135] In the eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, the resource allocation associated with the selected channel for sidelink-assisted feedback is selected from a resource pool associated with the sidelink-assisted feedback, which is included in a set of resource pools associated with the sidelink-assisted feedback.

[0136] In the nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the resource allocation associated with the selected channel for sidelink-assisted feedback is selected from an appropriate subset of the resource pool associated with the sidelink-assisted feedback.

[0137] In the twentieth aspect, either alone or in combination with one or more of the first to nineteenth aspects, an indication of resource allocation associated with a selected channel for sidelink-assisted feedback indicates the resources in the resource pool associated with the sidelink-assisted feedback for that sidelink-assisted feedback.

[0138] although Figure 8 An example box of process 800 is shown, but in some respects, process 800 may include... Figure 8 The boxes depicted in the process are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Additionally or alternatively, two or more boxes of process 800 can be executed in parallel.

[0139] The following provides an overview of some aspects of this disclosure:

[0140] Aspect 1: A wireless communication method performed by a user equipment (UE) comprising: receiving an indication of a resource allocation associated with a selected channel for sidelink-assisted feedback, wherein the sidelink-assisted feedback is associated with uplink control information (UCI), aperiodic channel state information feedback, or a scheduling request; and transmitting the sidelink-assisted feedback on the resource allocation.

[0141] Aspect 2: The method of aspect 1, wherein the selected channel is a physical side-link shared channel, and wherein the method further includes: using media access control signaling to transmit side-link auxiliary feedback.

[0142] Aspect 3: The method of any of Aspects 1-2, wherein the method further includes: using sidelink control information to transmit sidelink-assisted feedback.

[0143] Aspect 4: The method of aspect 3, wherein the side link control information uses a format associated with carrying the UCI on the access link between the UE and the base station.

[0144] Aspect 5: The method of any of Aspects 1-4, wherein the selected channel is a physical side link feedback channel.

[0145] Aspect 6: The method of aspect 5, wherein the physical sidelink feedback channel resources for transmitting sidelink-assisted feedback are at least partially based on uplink resources associated with the payload of the sidelink-assisted feedback.

[0146] Aspect 7: The method of aspect 6 further includes: identifying physical sidelink feedback channel resources based at least in part on at least the following: time slots or sub-time slots associated with uplink resources, resource sets associated with uplink resources, uplink resources, physical uplink control channel formats associated with payloads, timing parameters of sidelink auxiliary feedback or payloads, time slots or frequency resources of physical sidelink feedback channel resources, or combinations thereof.

[0147] Aspect 8: The method of aspect 7, wherein the identification of physical side link feedback channel resources is based at least in part on the physical uplink control channel configuration associated with the payload.

[0148] Aspect 9: The method of any of Aspects 1-8, wherein the indication of resource allocation is based at least in part on resources associated with a physical downlink control channel, a control resource set, or a physical downlink shared channel, and the gap between such resources and resource allocation.

[0149] Aspect 10: The method of aspect 9, wherein the gap between the resource and the resource allocation is based at least in part on the minimum processing time of the UE.

[0150] Aspect 11: The method of any of Aspects 1-10, wherein the resource allocation is dedicated to the UE at least in part based on the UE being a remote UE on a side link.

[0151] Aspect 12: The method of any of Aspects 1-11, wherein the indication of resource allocation is transmitted via downlink control information (DCI).

[0152] Aspect 13: The method of aspect 12, wherein the DCI is associated with the selection of the link for side-link auxiliary feedback.

[0153] Aspect 14: The method of aspect 12, wherein DCI indicates the time and frequency resources used for side-link assisted feedback.

[0154] Aspect 15: The method of aspect 12, wherein the DCI indicates the time resources used for side-link assisted feedback, and wherein the frequency resources used for side-link assisted feedback are indicated semi-statically.

[0155] Aspect 16: The method of aspect 12, wherein the DCI indicates time resources for side-link assisted feedback, and wherein the frequency resources for side-link assisted feedback are based at least in part on at least the time resources, the time slots associated with the DCI, or a combination thereof.

[0156] Aspect 17: The method of aspect 12, wherein the DCI indicates the frequency resources used for side-link assisted feedback and the time slots used to determine the time resources used for side-link assisted feedback.

[0157] Aspect 18: The method of aspect 12, wherein the DCI indicates the physical sidelink feedback channel resources and physical sidelink feedback channel format used for sidelink-assisted feedback.

[0158] Aspect 19: The method of any of Aspects 1-18, wherein the resource allocation associated with the selected channel for the side-link assisted feedback is selected from a resource pool associated with the side-link assisted feedback, wherein the resource pool is included in a set of resource pools associated with the side-link assisted feedback, and wherein the indication of the resource allocation indicates the resource pool or the carrier for the resource allocation.

[0159] Aspect 20: The method of any of Aspects 1-19, wherein the resource allocation associated with the selected channel for sidelink-assisted feedback is selected from an appropriate subset of the resource pool associated with the sidelink-assisted feedback.

[0160] Aspect 21: The method of aspect 20, wherein an indication of resource allocation associated with a selected channel for sidelink-assisted feedback indicates resources in a resource pool associated with the sidelink-assisted feedback for the sidelink-assisted feedback.

[0161] Aspect 22: A wireless communication method performed by a base station, comprising: selecting a channel on a sidelink of a user equipment (UE) for sidelink-assisted feedback to be transmitted by the UE, wherein the sidelink-assisted feedback is associated with uplink control information (UCI), aperiodic channel state information feedback, or scheduling request (SR); and transmitting to the UE an indication of resource allocation associated with the selected channel for the sidelink-assisted feedback.

[0162] Aspect 23: The method of aspect 22, wherein the selected channel is a physical sidelink shared channel, and wherein the method further includes: using media access control signaling to receive sidelink auxiliary feedback.

[0163] Aspect 24: The method of any of Aspects 22-23, wherein the method further includes: using sidelink control information to receive sidelink-assisted feedback.

[0164] Aspect 25: The method of aspect 24, wherein the side link control information uses a format associated with carrying the UCI on the access link between the UE and the base station.

[0165] Aspect 26: The method of any of Aspects 22-25, wherein the selected channel is a physical side link feedback channel.

[0166] Aspect 27: The method of aspect 26, wherein the physical sidelink feedback channel resources for transmitting sidelink-assisted feedback are at least partially based on uplink resources associated with the payload of the sidelink-assisted feedback.

[0167] Aspect 28: The method of aspect 27 further includes: identifying physical sidelink feedback channel resources based at least in part on at least the following: time slots or sub-time slots associated with uplink resources, resource sets associated with uplink resources, uplink resources, physical uplink control channel formats associated with payloads, timing parameters of sidelink auxiliary feedback or payloads, time slots or frequency resources of physical sidelink feedback channel resources, or combinations thereof.

[0168] Aspect 29: The method of aspect 28, wherein the identification of physical side link feedback channel resources is based at least in part on the physical uplink control channel configuration associated with the payload.

[0169] Aspect 30: The method of any of Aspects 22-30, wherein the indication of resource allocation is based at least in part on resources associated with a physical downlink control channel, a control resource set or a physical downlink shared channel, and the gap between such resources and resource allocation.

[0170] Aspect 31: The method of aspect 30, wherein the gap between the resource and the resource allocation is based at least in part on the minimum processing time of the UE.

[0171] Aspect 32: The method of any of Aspects 22-31, wherein the resource allocation is dedicated to the UE at least in part based on the UE being a remote UE on a side link.

[0172] Aspect 33: The method of any of Aspects 22-32, wherein the indication of resource allocation is transmitted via downlink control information (DCI).

[0173] Aspect 34: The method of aspect 33, wherein the DCI is associated with the selection of the link for side-link auxiliary feedback.

[0174] Aspect 35: The method of aspect 33, wherein DCI indicates the time and frequency resources used for side-link assisted feedback.

[0175] Aspect 36: The method of aspect 33, wherein the DCI indicates the time resources used for side-link assisted feedback, and wherein the frequency resources used for side-link assisted feedback are indicated semi-statically.

[0176] Aspect 37: The method of aspect 36, wherein the DCI indicates the time resources for sidelink-assisted feedback, and wherein the frequency resources for sidelink-assisted feedback are based at least in part on at least the time resources, the time slots associated with the DCI, or a combination thereof.

[0177] Aspect 38: The method of aspect 36, wherein the DCI indicates the frequency resources used for side-link assisted feedback and the time interval used to determine the time resources used for side-link assisted feedback.

[0178] Aspect 39: The method of aspect 36, wherein the DCI indicates the physical sidelink feedback channel resources and physical sidelink feedback channel format used for sidelink-assisted feedback.

[0179] Aspect 40: The method of any of Aspects 22-39, wherein the resource allocation associated with the selected channel for the side-link assisted feedback is selected from a resource pool associated with the side-link assisted feedback, wherein the resource pool is included in a set of resource pools associated with the side-link assisted feedback, and wherein the indication of the resource allocation indicates the resource pool or the carrier for the resource allocation.

[0180] Aspect 41: The method of any of Aspects 22-40, wherein the resource allocation associated with the selected channel for sidelink-assisted feedback is selected from an appropriate subset of the resource pool associated with the sidelink-assisted feedback.

[0181] Aspect 42: The method of aspect 41, wherein an indication of resource allocation associated with a selected channel for sidelink-assisted feedback indicates resources in a resource pool associated with the sidelink-assisted feedback for the sidelink-assisted feedback.

[0182] Aspect 43: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform methods as described in one or more of aspects 1-42.

[0183] Aspect 44: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform methods as described in one or more aspects of aspects 1-42.

[0184] Aspect 45: An apparatus for wireless communication, comprising at least one means for performing a method as described in one or more aspects of aspects 1-42.

[0185] Aspect 46: A non-transient computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform methods as described in one or more aspects of aspects 1-42.

[0186] Aspect 47: A non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform methods as described in one or more aspects of aspects 1-42.

[0187] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the foregoing disclosure or may be obtained through practice.

[0188] As used herein, the term "component" is intended to be broadly interpreted as hardware and / or a combination of hardware and software. "Software" should be broadly interpreted as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, whether referred to as software, firmware, middleware, microcode, hardware description languages, or other terms. As used herein, processors are implemented using hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limited in any way. Thus, the operation and behavior of these systems and / or methods are described herein without reference to any specific software code—it is understood that software and hardware can be designed to implement these systems and / or methods, at least in part, based on the descriptions herein.

[0189] As used in this article, depending on the context, a threshold can refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0190] Although specific combinations of features are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below may be directly subordinated to only one claim, the disclosure of aspects includes each dependent claim being combined with each other claim in this set of claims. As used herein, the phrase “at least one of” refers to any combination of these items, including single members. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination having multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0191] The elements, actions, or instructions used herein should not be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “a certain” are intended to include one or more items and may be used interchangeably with “one or more.” Additionally, as used herein, the article “the” is intended to include one or more items referenced in conjunction with the article “the” and may be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Moreover, as used herein, the terms “have,” “contain,” “include,” etc., are intended to be open-ended terms. Additionally, the phrase “based on” is intended to mean “at least partially based on” unless otherwise explicitly stated. Moreover, as used herein, the term “or” is intended to be inclusive when used in a sequence and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., in combination with “either of” or “only one of”).

Claims

1. A method of wireless communication performed by a remote user equipment (UE), comprising: receiving, from a network node via an access link between the remote UE and the network node, a communication including an indication of a resource allocation associated with a sidelink channel between the remote UE and a relay UE for communicating feedback to the network node via the relay UE, wherein the feedback is associated with the access link between the remote UE and the network node, wherein the indication of the resource allocation is based at least in part on resources associated with a physical downlink control channel, a control resource set, or a physical downlink shared channel, and a gap between the resources and the resource allocation; and communicating, by the remote UE via the relay UE, the feedback to the network node on the resource allocation associated with the sidelink channel, wherein the feedback indicates whether the remote UE successfully received the communication from the network node via the access link.

2. The method of claim 1, wherein the sidelink channel is a physical sidelink shared channel, and wherein the method further comprises: communicating the feedback using medium access control signaling.

3. The method of claim 1, wherein the method further comprises: communicating the feedback using sidelink control information.

4. The method of claim 3, wherein the sidelink control information uses a format associated with carrying uplink control information (UCI) on the access link between the remote UE and the network node.

5. The method of claim 1, wherein the sidelink channel is a physical sidelink feedback channel.

6. The method of claim 5, wherein a physical sidelink feedback channel resource for communicating the feedback is based at least in part on an uplink resource associated with a payload of the feedback.

7. The method of claim 6, further comprising: identifying the physical sidelink feedback channel resource based at least in part on at least: a slot or sub-slot associated with the uplink resource, a resource set associated with the uplink resource, the uplink resource, a physical uplink control channel format associated with the payload, a timing parameter of the feedback or the payload, a time gap or a frequency resource of the physical sidelink feedback channel resource, or a combination thereof.

8. The method of claim 7, wherein identifying the physical sidelink feedback channel resource is based at least in part on a physical uplink control channel configuration associated with the payload.

9. The method of claim 1, wherein the gap between the resources and the resource allocation is based at least in part on a minimum processing time of the relay UE.

10. The method of claim 1, wherein the resource allocation is based at least in part on the remote UE being dedicated to the remote UE on the sidelink channel.

11. The method of claim 1, wherein the communication includes downlink control information (DCI).

12. The method of claim 11, wherein the DCI is associated with a link selected for the feedback.

13. The method of claim 11, wherein the DCI indicates time resources and frequency resources for the feedback.

14. The method of claim 11, wherein the DCI indicates time resources for the feedback, and wherein frequency resources for the feedback are indicated semi-statically.

15. The method of claim 11, wherein the DCI indicates time resources for the feedback, and wherein frequency resources for the feedback are based at least in part on at least: the time resources, a slot associated with the DCI, or a combination thereof.

16. The method of claim 11, wherein the DCI indicates frequency resources for the feedback and a time gap for determining time resources for the feedback.

17. The method of claim 11, wherein the DCI indicates physical sidelink feedback channel resources and a physical sidelink feedback channel format for the feedback.

18. The method of claim 1, wherein the resource allocation associated with the sidelink channel for the feedback is selected from a resource pool associated with feedback, wherein the resource pool is included in a set of resource pools associated with transmitting feedback to the network node, and wherein the indication of the resource allocation indicates the resource pool or a carrier for the resource allocation.

19. The method of claim 1, wherein the resource allocation associated with the sidelink channel for the feedback is selected from a proper subset of a resource pool associated with transmitting feedback to the network node.

20. The method of claim 19, wherein the indication of the resource allocation associated with the sidelink channel for the feedback indicates resources in the resource pool associated with transmitting feedback to the network node for the feedback.

21. A method of wireless communication performed by a network node, comprising: selecting, on a sidelink of a remote user equipment (UE), a sidelink channel between the remote UE and a relay UE for feedback to be transmitted by the remote UE to the network node via the relay UE, wherein the feedback is associated with an access link between the remote UE and the network node; transmitting, to the remote UE via the access link between the remote UE and the network node, a communication including an indication of a resource allocation associated with the sidelink channel for transmitting the feedback to the network node via the relay UE, wherein the indication of the resource allocation is based at least in part on resources associated with a physical downlink control channel, a control resource set, or a physical downlink shared channel, and a gap between the resources and the resource allocation; and receiving, from the remote UE via the relay UE, the feedback, wherein the feedback indicates whether the remote UE successfully received the communication from the network node via the access link.

22. The method of claim 21, wherein the sidelink channel is a physical sidelink shared channel, and wherein receiving the feedback comprises: receiving the feedback using medium access control signaling.

23. The method of claim 21, wherein receiving the feedback comprises: receiving the feedback using sidelink control information.

24. The method of claim 21, wherein the resource allocation associated with the sidelink channel is selected from a resource pool associated with transmitting feedback to the network node via the relay UE, wherein the resource pool is included in a set of resource pools associated with transmitting feedback to the network node via the relay UE, and wherein the indication of the resource allocation indicates the resource pool or a carrier for the resource allocation.

25. A network node for wireless communication, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to: select, on a sidelink of a remote user equipment (UE), a sidelink channel between the remote UE and a relay UE for transmitting feedback to the network node via the relay UE, wherein the feedback is associated with an access link between the remote UE and the network node; transmit, to the remote UE via the access link between the remote UE and the network node, a communication including an indication of a resource allocation associated with the sidelink channel for transmitting the feedback to the network node via the relay UE, wherein the indication of the resource allocation is based at least in part on resources associated with a physical downlink control channel, a control resource set, or a physical downlink shared channel, and a gap between the resources and the resource allocation; and receive, from the remote UE via the relay UE, the feedback, wherein the feedback indicates whether the remote UE successfully received the communication from the network node via the access link.

26. The network node of claim 25, wherein the sidelink channel is a physical sidelink shared channel, and wherein, to receive the feedback, the one or more processors are configured to: receive the feedback using medium access control signaling or sidelink control information.

27. The network node of claim 25, wherein the resource allocation associated with the sidelink channel is selected from a resource pool associated with transmitting feedback to the network node via the relay UE, wherein the resource pool is included in a set of resource pools associated with transmitting feedback to the network node via the relay UE, and wherein the indication of the resource allocation indicates the resource pool or a carrier for the resource allocation.

28. A remote user equipment (UE) for wireless communication, comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to: select, on a sidelink of a remote user equipment (UE), a sidelink channel between the remote UE and a relay UE for transmitting feedback to the network node via the relay UE, wherein the feedback is associated with an access link between the remote UE and the network node; receiving, from the network node via an access link between the remote UE and the network node, a communication including an indication of an allocation of resources associated with a sidelink channel between the remote UE and a relay UE for communicating feedback to the network node via the relay UE, wherein the feedback is associated with the access link between the remote UE and the network node, wherein the indication of the allocation of resources is based at least in part on resources associated with a physical downlink control channel, a control resource set, or a physical downlink shared channel, and a gap between the resources and the allocation of resources; and communicating, to the network node via the relay UE, the feedback on the allocation of resources associated with the sidelink channel, wherein the feedback indicates whether the remote UE successfully received the communication from the network node via the access link.

29. The remote UE of claim 28, wherein the sidelink channel is a physical sidelink feedback channel.

30. The remote UE of claim 28, the one or more processors further configured to: communicate the feedback using medium access control signaling.

31. The remote UE of claim 28, the one or more processors further configured to: communicate the feedback using sidelink control information.

32. The remote UE of claim 31, wherein the sidelink control information uses a format associated with carrying uplink control information (UCI) on the access link between the remote UE and the network node.

33. The remote UE of claim 29, wherein a physical sidelink feedback channel resource for communicating the feedback is based at least in part on an uplink resource associated with a payload of the feedback.

34. The remote UE of claim 33, the one or more processors further configured to: identify the physical sidelink feedback channel resource based at least in part on at least: a slot or sub-slot associated with the uplink resource, a resource set associated with the uplink resource, the uplink resource, a physical uplink control channel format associated with the payload, a timing parameter of the feedback or the payload, a time gap or a frequency resource of the physical sidelink feedback channel resource, or a combination thereof.

35. The remote UE of claim 34, wherein identifying the physical sidelink feedback channel resource is based at least in part on a physical uplink control channel configuration associated with the payload.

36. The remote UE of claim 28, wherein the gap between the resources and the allocation of resources is based at least in part on a minimum processing time of the relay UE.

37. The remote UE of claim 28, wherein the allocation of resources is based at least in part on the remote UE being dedicated to the remote UE on the sidelink channel.

38. The remote UE of claim 28, wherein the communication includes downlink control information (DCI).

39. The remote UE of claim 38, wherein the DCI is associated with selecting a link for the feedback.

40. The remote UE of claim 38, wherein the DCI indicates time resources and frequency resources for the feedback.

41. The remote UE of claim 38, wherein the DCI indicates time resources for the feedback, and wherein frequency resources for the feedback are indicated semi-statically.

42. The remote UE of claim 38, wherein the DCI indicates time resources for the feedback, and wherein frequency resources for the feedback are based at least in part on at least: the time resources, a slot associated with the DCI, or a combination thereof.

43. The remote UE of claim 38, wherein the DCI indicates frequency resources for the feedback and a time gap for determining time resources for the feedback.

44. The remote UE of claim 38, wherein the DCI indicates physical sidelink feedback channel resources and a physical sidelink feedback channel format for the feedback.

45. The remote UE of claim 28, wherein the resource allocation associated with the sidelink channel for the feedback is selected from a resource pool associated with feedback, wherein the resource pool is included in a set of resource pools associated with transmitting feedback to the network node, and wherein the indication of the resource allocation indicates the resource pool or a carrier for the resource allocation.

46. The remote UE of claim 28, wherein the resource allocation associated with the sidelink channel for the feedback is selected from a proper subset of a resource pool associated with transmitting feedback to the network node.

47. The remote UE of claim 46, wherein the indication of the resource allocation associated with the sidelink channel for the feedback indicates resources in the resource pool associated with transmitting feedback to the network node for the feedback.

Images