Path selection for side link relays

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment may select a path for uplink communications associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or channel state information (CSI) feedback from a first path and a second path, wherein the first path is on an uplink of the UE and the second path is on a sidelink of the UE; and transmit the uplink communications on the selected path. 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 / 990,278, filed on March 16, 2020, entitled “PATH SELECTION FOR SIDELINK RELAY,” and U.S. Non-Provisional Patent Application No. 17 / 199,192, filed on March 11, 2021, entitled “PATH SELECTION FOR SIDELINK RELAY,” which are hereby expressly incorporated herein by reference.

[0003] Public domain

[0004] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for path selection for sidelink relaying.

[0005] background

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). 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 a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0007] A wireless network may include several base stations (BSs) that can support communications for several user equipments (UEs). The UE may communicate with the BS via a downlink and an 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 Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receiving Point (TRP), a New Radio (NR) BS, a 5G Node B, and the like.

[0008] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global level. NR (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR and other radio access technologies are still useful.

[0009] Overview

[0010] In some aspects, a wireless communication method performed by a user equipment (UE) may include: selecting a path for uplink communication associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or channel state information (CSI) feedback from a first path and a second path, wherein the first path is on an uplink of the UE and the second path is on a sidelink of the UE; and transmitting the uplink communication on the selected path.

[0011] In some aspects, a wireless communication method performed by a base station may include: selecting a path for uplink communication from a remote UE from a first path and a second path, wherein the uplink communication is associated with at least one of a variable payload size for HARQ feedback or CSI feedback, and wherein the first path is on an uplink of the remote UE and the second path is on a sidelink of the remote UE; and receiving the uplink communication based at least in part on the selected path.

[0012] 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: select a path for uplink communication associated with at least one of a variable payload size for HARQ feedback or CSI feedback from a first path and a second path, wherein the first path is on an uplink of the UE and the second path is on a sidelink of the UE; and transmit the uplink communication on the selected path.

[0013] 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 path for uplink communication from a remote UE from a first path and a second path, wherein the uplink communication is associated with at least one of a variable payload size for HARQ feedback or CSI feedback, and wherein the first path is on an uplink of the remote UE and the second path is on a sidelink of the remote UE; and receive the uplink communication based at least in part on the selected path.

[0014] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: select a path for uplink communication associated with at least one of a variable payload size for HARQ feedback or CSI feedback from a first path and a second path, wherein the first path is on an uplink of the UE and the second path is on a sidelink of the UE; and transmit the uplink communication on the selected path.

[0015] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to: select a path for uplink communication from a remote UE from a first path and a second path, wherein the uplink communication is associated with at least one of a variable payload size for HARQ feedback or CSI feedback, and wherein the first path is on an uplink of the remote UE and the second path is on a sidelink of the remote UE; and receive the uplink communication based at least in part on the selected path.

[0016] In some aspects, a device for wireless communication may include: a device for selecting a path for uplink communication associated with at least one of a variable payload size for HARQ feedback or CSI feedback from a first path and a second path, wherein the first path is on an uplink of the device and the second path is on a sidelink of the device; and a device for transmitting the uplink communication on the selected path.

[0017] In some aspects, an apparatus for wireless communications may include: a device for selecting a path for uplink communication from a remote UE from a first path and a second path, wherein the uplink communication is associated with at least one of a variable payload size for HARQ feedback or CSI feedback, and wherein the first path is on an uplink of the remote UE and the second path is on a sidelink of the remote UE; and a device for receiving the uplink communication based at least in part on the selected path.

[0018] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and as illustrated in the accompanying figures.

[0019] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims.

[0020] Although various aspects are described in the present disclosure by explaining some examples, it will be understood by those skilled in the art that these aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip embodiments or other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment, or devices that enable artificial intelligence). Various aspects can be implemented in chip-level components, module components, non-module components, non-chip-level components, device-level components, or system-level components. The equipment incorporating the various aspects and features described may include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals may include several components (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, (all) processors, interleavers, adders or summers) for analog and digital purposes. The various aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements, or end-user devices of various sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

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

[0024] Figure 2 is a diagram illustrating an example in which a base station and a UE are in communication in a wireless network according to the present disclosure.

[0025] Figure 3 is a diagram illustrating an example of side link communication according to the present disclosure.

[0026] Figure 4 is a diagram illustrating an example of side link communication and access link communication according to the present disclosure.

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

[0028] Figure 6 is a diagram illustrating an example of selection of a path for uplink communication according to the present disclosure.

[0029] Figure 7 is a diagram illustrating an example process performed, for example, by user equipment according to the present disclosure.

[0030] Figure 8 is a diagram illustrating an example process performed, for example, by a base station according to the present disclosure.

[0031] Detailed Description

[0032] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings of this article, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is independently implemented or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0033] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "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 while various aspects may be described herein using terminology generally associated with 5G or new radio (NR) radio access technology (RAT), various aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0035] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present 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, a B node, a gNB, a 5G B node (NB), an access point, a transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0036] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0037] In some aspects, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or 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 that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , relay BS 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS may also be referred to as a relay station, relay base station, relay, or the like.

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

[0040] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly via a wireless or wired backhaul.

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

[0042] Some UEs may be considered as 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, meters, monitors, and / or location tags, which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network) via, for example, a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE120 may be included inside a housing that houses components of UE 120, such as a processor component and / or a memory component. In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

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

[0044] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. 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 case, 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) may provide a relay service for a second UE (e.g., UE 120e) via a side link. For example, a side link communication may 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 a BS 110. In some aspects, a remote UE 120 may be outside the coverage area of ​​a radio access network so that the remote UE 120 cannot communicate directly with the BS 110. In such a case, a relay may be deployed to extend network coverage. In some aspects, a remote UE 120 may be within the coverage area of ​​a BS 110. In such a case, a relay UE 120 may improve the performance and network capacity of a remote UE 120 by enabling the remote UE to perform side link and radio access (e.g., uplink / downlink) communications.

[0046] The devices of the wireless network 100 can communicate using an electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 can communicate using an operating frequency band having a first frequency range (FR1) that can span from 410 MHz to 7.125 GHz, and / or can communicate using an operating frequency band having a second frequency range (FR2) that can span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz band". Similarly, FR2 is often referred to as a "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise specifically stated, it should be understood that if used herein, the term sub-"6 GHz" or the like can broadly represent frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that if used herein, the term "millimeter wave" or the like can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated 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 are provided as examples. Other examples may differ from those described in Figure 1 Examples described.

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

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

[0050] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, etc. In some aspects, one or more components of UE 120 may be included in a housing.

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

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

[0053] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from a controller / processor 280. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, where applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 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 described with reference to Figure 3-8 described).

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

[0055] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) of the base station 110 may perform one or more techniques associated with path selection for sidelink relay, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Figure 7 The process of 700 Figure 8 800, and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes 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, the one or more instructions, when executed (e.g., directly, or after compilation, conversion, and / or interpretation) by one or more processors of base station 110 and / or UE 120, may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example Figure 7 The process of 700 Figure 8 In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0056] In some aspects, UE 120 may include: means for selecting a path for uplink communications associated with at least one of variable payload size for hybrid automatic repeat request (HARQ) feedback or channel state information (CSI) feedback from a first path and a second path, wherein the first path is on an uplink of the UE and the second path is on a sidelink of the UE; and means for transmitting the uplink communications on the selected path; and means for receiving configuration information indicating a rule for selecting a path, wherein the path is selected according to the rule, etc. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0057] In some aspects, the base station 110 may include: a device for selecting a path for uplink communication from a remote UE from a first path and a second path, wherein the uplink communication is associated with at least one of a variable payload size for HARQ feedback or CSI feedback, and wherein the first path is on an uplink of the remote UE and the second path is on a sidelink of the remote UE; a device for receiving the uplink communication based at least in part on the selected path; and a device for transmitting downlink control information associated with the CSI feedback or a downlink shared channel associated with the HARQ feedback, wherein a field of the downlink control information indicates the selected path. ; means for transmitting a downlink control channel associated with the uplink communication, wherein a radio network temporary identifier associated with the downlink control channel indicates a selected path; means for transmitting a downlink control channel associated with the uplink communication, wherein a control resource set associated with the downlink control channel indicates a selected path; means for transmitting downlink control information associated with the uplink communication, wherein a search space associated with a candidate associated with the downlink control information indicates a selected path; means for transmitting configuration information indicating a rule for selecting a path; means for configuring the selection of a path via radio resource control signaling, and the like. In some aspects, such means may include in combination Figure 2 One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0058] although Figure 2 The blocks in the 200 and 210 are illustrated as different components, but the functions described above with respect to these blocks may be implemented with a single hardware, software, or combined component or a combination of various components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0059] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described in Figure 2 Examples described.

[0060] Figure 3 is a diagram illustrating an example 300 of sidelink communications according to the present 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 side link channels 310. UE 305-1 and UE 305-2 can use one or more side link channels 310 to communicate for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, V2P communication, etc.), mesh networking, etc. In some aspects, UE 305 (e.g., UE 305-1 and / or UE 305-2) can correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, one or more side link channels 310 can use a ProSe side link (PC5) interface and / or can operate in a high frequency band (e.g., a 5.9 GHz band). Additionally or alternatively, the UE 305 can use global navigation satellite system (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (eg, frames, subframes, time slots, symbols, etc.).

[0062] As in Figure 3 As further shown in FIG. 1 , 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. The 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) used for cellular communication with the base station 110 via an access link or access channel. The PSSCH 320 may be used to convey data, similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communication with the base station 110 via an access link or access channel. For example, the 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, space resources, etc.), wherein a transport block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data. The PSFCH 325 may be used to communicate sidelink feedback 340, such as hybrid automatic repeat request (HARQ) feedback (eg, acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), scheduling request (SR), and the like.

[0063] In some aspects, one or more sidelink channels 310 may use a resource pool. For example, a scheduling assignment (e.g., included in SCI 330) may be transmitted in a subchannel using specific resource blocks (RBs) across time. In some aspects, a data transmission 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 some aspects, a scheduling assignment and an associated data transmission are not transmitted on adjacent RBs.

[0064] In some aspects, the UE 305 may operate using a transmission mode in which resource selection and / or scheduling is performed by the UE 305 (e.g., rather than the base station 110). In some aspects, the UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmission. For example, the UE 305 may measure received signal strength indicator (RSSI) parameters associated with various side link channels (e.g., side link RSSI (S-RSSI) parameters); may measure reference signal received power (RSRP) parameters associated with various side link channels (e.g., PSSCH-RSRP parameters); may measure reference signal received quality (RSRQ) parameters associated with various side link channels (e.g., PSSCH-RSRQ parameters), etc.; and may select a channel for transmitting side link communications based at least in part on the measurement(s).

[0065] Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling using the SCI 330 (which may indicate occupied resources, channel parameters, etc.) received in the PSCCH 315. Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling by determining a channel busy rate (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 may use for a particular set of subframes).

[0066] In a transmission mode in which resource selection and / or scheduling is performed by the UE 305, the UE 305 may generate sidelink grants and may transmit these grants in the SCI 330. The sidelink grant may indicate, for example, one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks to be used for an upcoming sidelink transmission on the PSSCH 320 (e.g., for TB 335), one or more subframes to be used for an upcoming sidelink transmission, a modulation and coding scheme (MCS) to be used for an upcoming sidelink transmission, etc. In some aspects, the UE 305 may generate a sidelink grant that indicates one or more parameters for semi-persistent scheduling (SPS), such as the periodicity of the sidelink transmission. Additionally or alternatively, the UE 305 may generate a sidelink grant for event-driven scheduling (such as for an on-demand sidelink message).

[0067] As indicated above, Figure 3 are provided as examples. Other examples may differ from those described herein. Figure 3 Examples described.

[0068] Figure 4 is a diagram illustrating an example 400 of side link communications and access link communications according to the present disclosure.

[0069] like Figure 4 As shown in FIG. 4 , a transmitting (Tx) UE 405 and a receiving (Rx) UE 410 may communicate with each other via a side link, as described above in conjunction with Figure 3 As further shown, in some sidelink modes, the base station 110 may communicate with the Tx UE 405 via a first access link. Additionally or alternatively, in some sidelink modes, the base station 110 may communicate with the Rx UE 410 via a second access link. The Tx UE 405 and / or the Rx UE 410 may correspond to one or more UEs described elsewhere herein, such as Figure 1 120. Thus, a side link may refer to a direct link between UEs 120, and an access link may refer to a direct link between base station 110 and UE 120. Side link communications may be transmitted via the side link, and access link communications may be transmitted via the access link. Access link communications may be downlink communications (from base station 110 to UE 120) or uplink communications (from UE 120 to base station 110).

[0070] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described herein. Figure 4 Examples described.

[0071] Figure 55 is a diagram illustrating an example 500 of two-stage sidelink control information (SCI) according to the present disclosure. SCI may be provided in a first stage and a second stage, as shown 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 may be transmitted on the PSCCH. SCI-1 may include a resource allocation as shown by reference numeral 530, and may include information for decoding SCI-2 (e.g., the format of SCI-2 and / or other information). The resource allocation may indicate resources for SCI-2 and / or a shared channel (SCH) as shown by reference numeral 540. SCI-2 may be transmitted on the PSSCH. SCI-2 may include information for decoding the SCH. SCI-1 and / or SCI-2 may be encoded and / or decoded using a physical downlink control channel (PDCCH) polarity decoding / decoding chain.

[0072] In some aspects, SCI-2 may be mapped to continuous resource blocks (RBs) starting from the first symbol with a PSSCH demodulation reference signal (DMRS) in the PSSCH. In some aspects, SCI-2 may be scrambled separately from the SCH. In some aspects, quadrature phase shift keying (QPSK) may be used to modulate SCI-2. Since the format of SCI-2 may be indicated by SCI-1, the receiver of SCI-2 may not perform blind decoding of SCI-2, thereby saving computational resources.

[0073] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described in Figure 5 Examples described.

[0074] The remote UE can utilize the service of the relay UE to relay the communication between the remote UE and the BS. This may be beneficial for situations where the coverage of the remote UE is limited and in situations where the remote UE is covered by the radio access network of the BS (for example, in the situation where the remote UE has a Uu link with the BS). For example, if the Uu link is congested, multiple side link communications between the remote UE and the associated relay UE can be scheduled. If these multiple side link communications do not interfere with each other, the network capacity can be increased. In addition, in terms of power consumption, since it can be expected that the relay UE is closer to the remote UE than the BS, it may be more desirable for the uplink transmission to be relayed to the BS (because transmission from the remote UE to the relay UE can use less power than transmission from the remote UE to the BS). For example, the amount of power required for each channel may depend on the target block error rate (BLER), the payload, and the code rate. Generally speaking, the power required to transmit a larger packet, such as an uplink shared channel (UL-SCH) on PUSCH, is greater than the power required to transmit a smaller packet, such as a set of bits of a hybrid automatic repeat request (HARQ) acknowledgment (ACK) (HARQ-ACK) on PUCCH.

[0075] Transmitting arbitrarily on the uplink or sidelink may be an inefficient use of the resources of the remote UE. For example, consider uplink control information (UCI) with a variable payload size. The payload of UCI can vary from a single bit to hundreds of bits. Therefore, the UE can transmit a larger payload on the uplink than on the sidelink using significantly more power. As another example, consider aperiodic channel state information (A-CSI) feedback that is not associated with UL-SCH. In such a situation, the BS may not schedule PUSCH / PSSCH for UL-SCH, so the remote UE may not have an indication of whether to transmit A-CSI feedback on the uplink or on the sidelink.

[0076] Some techniques and devices described herein provide for selecting a path from an uplink path and a sidelink path for transmitting an uplink transmission by a remote UE. For example, an uplink transmission may include UCI with a variable payload, A-CSI not associated with UL-SCH, or another form of communication. The determination may be performed at the BS and indicated to the remote UE, or the determination may be performed at the remote UE, or a combination thereof. The determination and / or indication may be performed dynamically or semi-statically. Some techniques and devices described herein provide for determining a path for transmissions configured for uplink (such as scheduling requests, periodic or semi-persistent CSI, physical uplink shared channels with configuration grants, etc.). In this way, the power consumption of the remote UE is reduced, and the reliability of the communication between the remote UE and the BS is improved. In addition, the throughput between the remote UE and the BS is improved.

[0077] Figure 6 600 is a diagram illustrating an example of selecting a path for uplink communication according to the present disclosure. As shown in the figure, Figure 6 A remote UE (e.g., UE 120 or UE 305), a relay UE (e.g., UE 120 or UE 305), and a BS 110 are included. The remote UE 120 is associated with a first path 605 to the BS 110, which may be a link (e.g., an uplink and / or downlink connection) via a radio access network associated with a Uu interface. The remote UE is associated with a second path 610 to the BS 110. The second path 610 is via the relay UE 120. The second path 610 may be associated with a side link interface (such as a PC5 interface) between the remote UE and the relay UE. The second path 610 may be associated with a link via a radio access network associated with a Uu interface. The relay UE 120 may include one or more UEs 120 (e.g., the remote UE 120 may relay traffic via one or more relay UEs).

[0078] As used herein, "selecting a path" may refer to selecting a link for transmitting uplink communications. For example, the first path 605 may be an uplink (e.g., a communication link directly between the remote UE 120 and the BS 110), and the second path 610 may be a sidelink (e.g., a communication link between the remote UE 120 and the relay UE 120). When the remote UE 120 selects the second path 610 (which is equivalent to selecting the sidelink), the remote UE 120 may transmit uplink communications to the relay UE 120 via the sidelink, and the relay UE 120 may forward the uplink communications to the BS 110. When the remote UE 120 selects the first path 605 (which is equivalent to selecting the uplink), the remote UE may transmit uplink communications to the BS 110 via the uplink.

[0079] As indicated by reference numeral 615, BS 110 may select a path for uplink transmission. The path determined by BS 110 may be referred to as a selected path. As indicated by reference numeral 620, remote UE 120 may select a path for uplink transmission. For example, BS 110 may select a path and transmit information identifying the selected path to remote UE 120, and / or remote UE 120 may select the path (e.g., based at least in part on the information identifying the selected path, based at least in part on a configuration of remote UE 120, based at least in part on a semi-static rule). Techniques for selecting a path are described below.

[0080] Uplink transmissions may include UCI associated with a variable payload size (e.g., carrying HARQ-ACK feedback, etc.), A-CSI feedback not associated with UL-SCH, configured uplink transmissions (e.g., scheduling requests (SRs), periodic CSI (P-CSI) feedback, semi-persistent CSI (SP-CSI) feedback, PUSCH with configured grants, etc.), initial transmissions, repetitions of initial transmissions, and the like.

[0081] As indicated by reference numeral 625, BS 110 may provide configuration information to remote UE 120 (e.g., via first path 605 and / or second path 610). The configuration information may include information associated with configured communications (e.g., SR, P-CSI report, SP-CSI report, configured PUSCH, etc.) or configuration associated with selecting a path. In some aspects, the configuration information may be transmitted by BS 110 before BS 110 and / or UE 120 selects a path for uplink transmission. For example, the configuration information may indicate how to select a path, and UE 120 and / or BS 110 may select a path based on the configuration information. In some aspects, the configuration information may be provided using radio resource control (RRC) signaling, etc. Path selection based at least in part on the configuration information may be referred to as a semi-static indication or selection of a selected path.

[0082] In some aspects, one or more SR configurations to be used for transmitting the SR on the first path may be indicated, and one or more other SR configurations to be used for transmitting the SR on the second path may be indicated. In some aspects, one or more P-CSI / SP-CSI configurations to be used for transmitting the P-CSI / SP-CSI report on the first path may be indicated, and one or more other P-CSI / SP-CSI configurations to be used for transmitting the P-CSI / SP-CSI report on the second path may be indicated.

[0083] In some aspects, the remote UE 120 may be configured with one or more thresholds associated with selecting a path based at least in part on the configuration information. The thresholds may be related to payload size, code rate, modulation and coding scheme (MCS), parameters in downlink control information (DCI) related to uplink communication (e.g., timing parameters (such as K0, K1, or K2) or a different parameter), CSI type for uplink communication, PUCCH format for uplink transmission, etc. In some aspects, the configuration information may indicate which path to select. For example, the configuration information may indicate that one of the first path 605 or the second path 610 will be selected for a given uplink transmission, a given type of uplink transmission, an uplink transmission in a given time window, an uplink transmission performed after receiving the configuration information until receiving updated configuration information, etc.

[0084] In some aspects, the configuration information may indicate a configuration for selecting between a first path 605 and a second path 610 for a configured uplink transmission (e.g., SR, P-CSI, SP / CSI, PUSCH with a configured grant, etc.). For example, the selection of the path may be configured via RRC signaling. In some aspects, for SR, the selection may be configured for an SR configuration (e.g., for a specific SR configuration, for each SR configuration, etc.). In some aspects, for SR, the selection of the path may be based at least in part on a configured priority level associated with the SR configuration of the SR. For example, the first path 605 may be selected for a first priority level (e.g., a higher priority level), and the second path 610 may be selected for a second priority level (e.g., a lower priority level). In some aspects, for a configured grant PUSCH (CG-PUSCH), the selection may be configured for a CG-PUSCH configuration (e.g., for a specific CG-PUSCH configuration, for each CG-PUSCH configuration, etc.). In some aspects, for CG-PUSCH, selection of a path may be based at least in part on a configured priority level associated with a CG-PUSCH configuration of the CG-PUSCH. For example, a first path 605 may be selected for a first priority level (e.g., a higher priority level), and a second path 610 may be selected for a second priority level (e.g., a lower priority level). In some aspects, for P-CSI or SP-CSI, the selected path may be configured. Additionally or alternatively, the selected path may be selected based at least in part on a configured priority level associated with the P-CSI or SP-CSI, similar to that described with respect to SR and CG-PUSCH.

[0085] As shown by reference numeral 630, BS 110 may provide DCI to UE 120. In some aspects, DCI may be related to uplink communication. For example, DCI may include scheduling information for uplink communication. In some aspects, DCI may not be directly related to uplink communication. For example, DCI may be used to indicate a selected path for uplink communication not scheduled by DCI. In some aspects, UE 120 may select a path for uplink communication based at least in part on DCI. Selecting a path for uplink communication based at least in part on DCI may be referred to herein as a dynamic selection or determination of a selected path.

[0086] In some aspects, the path may be selected based at least in part on information included in the DCI. For example, a bit field of the DCI (e.g., DCI 0-X format for A-CSI and / or DCI 1-X format for PDSCH scheduling) may indicate whether the first path 605 or the second path 610 is to be used for the corresponding uplink transmission.

[0087] In some aspects, the path may be selected based at least in part on a radio network temporary identifier (RNTI) associated with the DCI. For example, if a first RNTI is used to decode a PDCCH associated with the DCI, the UE 120 may select a first path 605 for a corresponding uplink transmission, and if a second RNTI is used to decode the PDCCH associated with the DCI, the UE 120 may select a second path 610 for a corresponding uplink transmission.

[0088] In some aspects, a path may be selected based at least in part on a control resource set (CORESET) associated with the DCI. For example, if the DCI is in a first CORESET or a first set of CORESETs, the UE 120 may select a first path 605 for a corresponding uplink transmission, and if the DCI is in a second CORESET or a second set of CORESETs, the UE 120 may select a second path 610 for a corresponding uplink transmission.

[0089] In some aspects, a path may be selected based at least in part on a search space associated with a candidate on which the DCI is transmitted. For example, if the DCI is transmitted or decoded in a first search space set, the UE 120 may select a first path 605 for the corresponding uplink transmission, and if the DCI is transmitted or decoded in a second search space set, the UE 120 may select a second path 610 for the corresponding uplink transmission. If candidates are shared between two or more search spaces, the UE 120 may select a path based at least in part on a rule, such as a priority rule. For example, a DCI detected on a shared candidate may be selected for the first path 605 or the second path 610 based at least in part on a rule. In some aspects, the priority rule may be fixed or modified by configuration information shown in reference numeral 625.

[0090] In some aspects, a path may be selected based at least in part on the DCI size. For example, a first DCI size or DCI size range may correspond to the first path 605, and a second DCI size or DCI size range may correspond to the second path 610. As another example, a DCI having a size that meets a threshold may correspond to the first path 605, and a DCI having a size that fails to meet the threshold may correspond to the second path 610.

[0091] In some aspects, a path may be selected based at least in part on a DCI format. For example, a DCI format may be associated with a report on a side link. If the remote UE 120 receives a DCI using a DCI format corresponding to an uplink transmission, the remote UE 120 may select the second path 610 for the uplink transmission. If the DCI format is size aligned with another DCI format (e.g., a DCI format associated with scheduling uplink communications on the first path 605), and the remote UE 120 is configured to monitor both DCI formats in a search space set associated with the same CORESET, the remote UE 120 may select a path according to one or more of the rules described elsewhere herein.

[0092] In some aspects, a path may be selected based at least in part on a priority level indicated by a DCI. For example, an uplink transmission associated with a first priority level may be transmitted on a first path 605, and an uplink transmission associated with a second priority level may be transmitted on a second path 610. In some aspects, the first priority level may be a higher priority level, and the transmission associated with the first priority level may be transmitted via the first path 605 so that the waiting time associated with such transmission is reduced relative to relaying via a relay UE 120. In some aspects, an uplink channel may be associated with a priority level. For example, a PUCCH carrying HARQ-ACK feedback may be assigned a HARQ-ACK codebook associated with a configured priority. As another example, a priority level for dynamically granting a PUSCH (DG-PUSCH) may be indicated in a corresponding DCI. As another example, an uplink transmission including a CSI report triggered by a downlink may be associated with a priority level indicated in a corresponding DCI. UE 120 may select a path based at least in part on a priority level associated with uplink communication. In some aspects, the DCI may include a bit field (eg, one or more bits) that indicates which path should be selected.

[0093] As indicated by reference numeral 635, the remote UE 120 may transmit an uplink transmission on the selected path. As indicated by reference numeral 640, the BS 110 may receive the uplink transmission on the selected path. Thus, the remote UE 120 and / or the BS 110 may select a path for uplink transmission from the first path 605 and the second path 610, which improves resource utilization of the remote UE 120 and the BS 110, reduces power consumption of the remote UE 120, and improves coverage and performance of the remote UE 120 and / or the BS 110.

[0094] In some aspects, the remote UE 120 may select a first path for the first transmission and a second path for the second transmission. For example, the remote UE 120 may select a first path for the initial transmission of a communication and a second path for the retransmission of the communication, which increases the diversity of the communication, thereby increasing the likelihood that the communication is successfully received by the BS 110.

[0095] As indicated above, Figure 6 are provided as examples. Other examples may differ from those described herein. Figure 6 Examples described.

[0096] Figure 7 is a diagram illustrating an example process 700 performed, for example, by a UE in accordance with the present disclosure. Example process 700 is an example in which a UE (eg, UE 120, remote UE 120, UE 305, etc.) performs operations associated with path selection for sidelink relay.

[0097] like Figure 7 As shown in , in some aspects, process 700 may include: selecting a path for uplink communication associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or channel state information (CSI) feedback from a first path and a second path, wherein the first path is on the uplink of the UE and the second path is on the sidelink of the UE (block 710). For example, the UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) may select a path for uplink communication associated with at least one of a variable payload size for HARQ feedback or CSI feedback from the first path and the second path, as described above. In some aspects, the first path is on the uplink of the UE and the second path is on the sidelink of the UE. The sidelink may be a link to another UE (such as a dedicated relay). The other UE may receive the uplink communication on the second path and may forward the uplink communication to the base station.

[0098] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include transmitting an uplink communication on a selected path (block 720). For example, the UE (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) may transmit an uplink communication on a selected path, as described above.

[0099] 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.

[0100] In a first aspect, selecting a path for uplink communications is based at least in part on a dynamic determination.

[0101] In a second aspect, alone or in combination with the first aspect, selecting a path for uplink communication further comprises selecting a path based at least in part on a field of downlink control information associated with CSI feedback or a downlink shared channel associated with HARQ feedback.

[0102] In a third aspect, either alone or in combination with one or more of the first and second aspects, selecting a path for uplink communications further comprises selecting a path based at least in part on a radio network temporary identifier associated with a downlink control channel related to the uplink communications.

[0103] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, selecting a path for uplink communication further comprises selecting the path based at least in part on a control resource set associated with a downlink control channel related to the uplink communication.

[0104] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, selecting a path for uplink communication further comprises selecting a path based at least in part on a search space associated with candidates associated with downlink control information related to the uplink communication.

[0105] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, when the candidate is associated with two or more search spaces, selecting a path for uplink communication further includes selecting a path based at least in part on a priority rule.

[0106] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the priority rules are configured using radio resource control signaling.

[0107] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, selecting a path for uplink communication further comprises: selecting a path based at least in part on a size of downlink control information related to the uplink communication.

[0108] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, selecting a path for uplink communication further comprises selecting a path based at least in part on a format of downlink control information associated with the uplink communication, and the format being specific to sidelink reporting.

[0109] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, when a format of the downlink control information is indistinguishable from another format of the downlink control information, selecting a path for uplink communication further comprises selecting the path based at least in part on a priority rule.

[0110] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, selecting a path for uplink communications further comprises selecting a path based at least in part on a priority level associated with the uplink communications.

[0111] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the priority level is associated with a HARQ codebook or a scheduling request configuration associated with uplink communications.

[0112] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the priority level is indicated by uplink downlink control information triggering CSI feedback.

[0113] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, a first path is selected when the priority level is associated with a first priority, and a second path is selected when the priority level is associated with a second priority, wherein the first priority is higher than the second priority.

[0114] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, process 700 includes receiving configuration information indicating a rule for selecting a path, wherein the path is selected according to the rule.

[0115] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the rule is based at least in part on a threshold payload size.

[0116] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the rule is based at least in part on a threshold code rate.

[0117] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, the rule is based at least in part on a modulation and coding scheme index.

[0118] In a nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the rule is based at least in part on parameters in downlink control information associated with uplink communications.

[0119] In a twentieth aspect, either alone or in combination with one or more of the first to nineteenth aspects, the rule indicates that a particular path is to be selected.

[0120] In a twenty-first aspect, alone or in combination with one or more of the first to twentieth aspects, the rule is based at least in part on a CSI type of the CSI feedback.

[0121] In a twenty-second aspect, alone or in combination with one or more of the first to twenty-first aspects, the uplink communication is associated with a configured uplink transmission, and the selection of the path is configured via radio resource control signaling.

[0122] In aspect twenty-third, either alone or in combination with one or more of aspects one to twenty-second, when a configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is configured per scheduling request configuration or per CG-PUSCH transmission configuration.

[0123] In an aspect of twenty-fourth aspect, either alone or in combination with one or more of aspects one to twenty-third, when a configured uplink transmission is associated with a scheduling request or a CG-PUSCH, selection is based at least in part on a priority level of the scheduling request or the CG-PUSCH.

[0124] In aspect twenty-fifth, either alone or in combination with one or more of aspects one to twenty-fourth, when a configured uplink transmission is associated with CSI feedback, selection is based at least in part on a priority level of the CSI feedback or a configured path for the CSI feedback.

[0125] although Figure 7 An example block diagram of process 700 is shown, but in some aspects, process 700 may include Figure 7 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 700. Additionally or alternatively, two or more blocks of the process 700 may be executed in parallel.

[0126] Figure 8 is a diagram illustrating an example process 800 performed, for example, by a base station in accordance with the present disclosure. Example process 800 is an example of a base station (eg, BS 110, etc.) performing operations associated with path selection for sidelink relay.

[0127] like Figure 8As shown in, in some aspects, process 800 may include: selecting a path for uplink communication from a remote UE from a first path and a second path, wherein the uplink communication is associated with at least one of a variable payload size for HARQ feedback or CSI feedback, and wherein the first path is on the uplink of the remote UE and the second path is on the sidelink of the remote UE (block 810). 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 path for uplink communication from a remote UE from the first path and the second path, as described above. In some aspects, the uplink communication is associated with at least one of a variable payload size for HARQ feedback or CSI feedback. In some aspects, the first path is on the uplink of the remote UE and the second path is on the sidelink of the remote UE.

[0128] like Figure 8 As further shown in FIG. 8 , in some aspects, process 800 may include receiving the uplink communication based at least in part on the selected path (block 820). For example, the base station (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) may receive the uplink communication based at least in part on the selected path, as described above.

[0129] 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.

[0130] In a first aspect, process 800 includes transmitting downlink control information associated with CSI feedback or a downlink shared channel associated with HARQ feedback, wherein a field of the downlink control information indicates a selected path.

[0131] In a second aspect, alone or in combination with the first aspect, process 800 includes transmitting a downlink control channel related to uplink communications, wherein a radio network temporary identifier associated with the downlink control channel indicates a selected path.

[0132] In a third aspect, alone or in combination with one or more of the first and second aspects, process 800 includes transmitting a downlink control channel related to uplink communications, wherein a control resource set associated with the downlink control channel indicates a selected path.

[0133] In a fourth aspect, alone or in combination with one or more of the first to third aspects, process 800 includes transmitting downlink control information related to uplink communications, wherein a search space associated with a candidate associated with the downlink control information indicates a selected path.

[0134] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, when the candidate is associated with two or more search spaces, selecting a path for uplink communication further includes selecting a path based at least in part on a priority rule.

[0135] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the priority rules are configured using radio resource control signaling.

[0136] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, a size of downlink control information associated with uplink communications indicates a selected path.

[0137] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, a format of downlink control information associated with uplink communications indicates a selected path, and the format is specific to sidelink reporting.

[0138] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, when a format of the downlink control information is indistinguishable from another format of the downlink control information, the selected path is determined based at least in part on a priority rule.

[0139] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, selecting a path for uplink communications further comprises selecting a path based at least in part on a priority level associated with the uplink communications.

[0140] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the priority level is associated with a HARQ codebook or a scheduling request configuration associated with uplink communications.

[0141] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the priority level is indicated by uplink-downlink control information triggering CSI feedback.

[0142] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, a first path is determined when the priority level is associated with a first priority, and a second path is determined when the priority level is associated with a second priority, wherein the first priority is higher than the second priority.

[0143] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, process 800 includes transmitting configuration information indicating a rule for selecting a path.

[0144] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the rule is based at least in part on a threshold payload size.

[0145] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the rule is based at least in part on a threshold code rate.

[0146] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the rule is based at least in part on a modulation and coding scheme index.

[0147] In an eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, the rule is based at least in part on parameters in downlink control information related to uplink communications.

[0148] In a nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the rule indicates that a particular path is to be selected.

[0149] In a twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, the rule is based at least in part on a CSI type of the CSI feedback.

[0150] In a twenty-first aspect, alone or in combination with one or more of the first to twentieth aspects, the uplink communication is associated with a configured uplink transmission, and the method further comprises configuring selection of the path via radio resource control signaling.

[0151] In aspect twenty-second, either alone or in combination with one or more of aspects one to twenty-first, when a configured uplink transmission is associated with a scheduling request or a CG-PUSCH, the selection is configured per scheduling request configuration or per CG-PUSCH transmission configuration.

[0152] In an aspect of twenty-third, either alone or in combination with one or more of aspects one to twenty-second, when a configured uplink transmission is associated with a scheduling request or a CG-PUSCH, selection is based at least in part on a priority level of the scheduling request or the CG-PUSCH.

[0153] In a twenty-fourth aspect, either alone or in combination with one or more of the first to twenty-third aspects, when the configured uplink transmission is associated with CSI feedback, selection is based at least in part on a priority level of the CSI feedback or a configured path for the CSI feedback.

[0154] although Figure 8 An example block diagram of process 800 is shown, but in some aspects, process 800 may include Figure 8 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 800. Additionally or alternatively, two or more blocks of process 800 may be executed in parallel.

[0155] The following provides an overview of some aspects of the disclosure:

[0156] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising: selecting a path for uplink communication associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or channel state information (CSI) feedback from a first path and a second path, wherein the first path is on an uplink of the UE and the second path is on a sidelink of the UE; and transmitting the uplink communication on the selected path.

[0157] Aspect 2: The method of aspect 1, wherein selecting a path for uplink communication is based at least in part on a dynamic determination.

[0158] Aspect 3: The method of any of aspects 1-2, wherein selecting a path for uplink communication further comprises: selecting a path based at least in part on a field of downlink control information associated with CSI feedback or a downlink shared channel associated with HARQ feedback.

[0159] Aspect 4: The method of any of aspects 1-3, wherein selecting a path for uplink communication further comprises: selecting the path based at least in part on a radio network temporary identifier associated with a downlink control channel related to the uplink communication.

[0160] Aspect 5: The method of any of aspects 1-4, wherein selecting a path for uplink communication further comprises: selecting the path based at least in part on a set of control resources associated with a downlink control channel related to the uplink communication.

[0161] Aspect 6: The method of any of aspects 1-5, wherein selecting a path for uplink communication further comprises: selecting a path based at least in part on a search space associated with a candidate associated with downlink control information related to the uplink communication.

[0162] Aspect 7: The method of aspect 6, wherein when the candidate is associated with two or more search spaces, selecting the path for uplink communication further comprises selecting the path based at least in part on a priority rule.

[0163] Aspect 8: The method of aspect 7, wherein the priority rule is configured using radio resource control signaling.

[0164] Aspect 9: The method of any one of aspects 1-8, wherein selecting a path for uplink communication further comprises: selecting a path based at least in part on a size of downlink control information related to the uplink communication.

[0165] Aspect 10: The method of any of aspects 1-9, wherein selecting a path for uplink communication further comprises: selecting a path based at least in part on a format of downlink control information related to the uplink communication, wherein the format is specific for sidelink reporting.

[0166] Aspect 11: The method of aspect 10, wherein when the format of the downlink control information is indistinguishable from another format of the downlink control information, selecting the path for uplink communication further comprises selecting the path based at least in part on a priority rule.

[0167] Aspect 12: The method of any of aspects 1-11, wherein selecting a path for uplink communication further comprises: selecting a path based at least in part on a priority level associated with the uplink communication.

[0168] Aspect 13: The method of aspect 12, wherein the priority level is associated with a HARQ codebook or a scheduling request configuration associated with uplink communication.

[0169] Aspect 14: The method of aspect 12, wherein the priority level is indicated by uplink / downlink control information triggering CSI feedback.

[0170] Aspect 15: The method of aspect 12, wherein the first path is selected when the priority level is associated with a first priority, and the second path is selected when the priority level is associated with a second priority, wherein the first priority is higher than the second priority.

[0171] Aspect 16: The method of any one of aspects 1-15, further comprising: receiving configuration information indicating a rule for selecting a path, wherein the path is selected according to the rule.

[0172] Aspect 17: The method of Aspect 16, wherein the rule is based at least in part on a threshold payload size.

[0173] Aspect 18: The method of aspect 16, wherein the rule is based at least in part on a threshold code rate.

[0174] Aspect 19: The method of Aspect 16, wherein the rule is based at least in part on a modulation and coding scheme (MCS) index.

[0175] Aspect 20: The method of aspect 16, wherein the rule is based at least in part on a parameter in downlink control information related to uplink communications.

[0176] Aspect 21: The method of Aspect 16, wherein the rule indicates that a specific path is to be selected.

[0177] Aspect 22: The method of Aspect 16, wherein the rule is based at least in part on a CSI type of the CSI feedback.

[0178] Aspect 23: The method of any one of aspects 1-22, wherein the uplink communication is associated with a configured uplink transmission, and wherein the selection of the path is configured via radio resource control signaling.

[0179] Aspect 24: A method as in Aspect 23, wherein, when the configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is configured per scheduling request configuration or per CG-PUSCH transmission.

[0180] Aspect 25: A method as in Aspect 23, wherein, when the configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is based at least in part on a priority level of the scheduling request or the CG-PUSCH.

[0181] Aspect 26: The method of aspect 23, wherein, when the configured uplink transmission is associated with CSI feedback, the selection is based at least in part on a priority level of the CSI feedback or a configured path for the CSI feedback.

[0182] Aspect 27: A wireless communication method performed by a base station, comprising: selecting a path for uplink communication from a remote user equipment (UE) from a first path and a second path, wherein the uplink communication is associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or channel state information (CSI) feedback, and wherein the first path is on an uplink of the remote UE and the second path is on a sidelink of the remote UE; and receiving the uplink communication based at least in part on the selected path.

[0183] Aspect 28: The method as described in Aspect 27 further includes: transmitting downlink control information associated with CSI feedback or a downlink shared channel associated with HARQ feedback, wherein a field of the downlink control information indicates the selected path.

[0184] Aspect 29: The method of any one of aspects 27-28, further comprising: transmitting a downlink control channel related to the uplink communication, wherein the radio network temporary identifier associated with the downlink control channel indicates the selected path.

[0185] Aspect 30: The method of any one of aspects 27-29, further comprising: transmitting a downlink control channel related to uplink communication, wherein the control resource set associated with the downlink control channel indicates the selected path.

[0186] Aspect 31: The method of any one of aspects 27-30, further comprising: transmitting downlink control information related to uplink communication, wherein the search space associated with the candidate associated with the downlink control information indicates the selected path.

[0187] Aspect 32: The method of aspect 31, wherein when the candidate is associated with two or more search spaces, selecting the path for uplink communication further comprises selecting the path based at least in part on a priority rule.

[0188] Aspect 33: The method of Aspect 32, wherein the priority rule is configured using radio resource control signaling.

[0189] Aspect 34: The method of any one of aspects 27-33, wherein the size of the downlink control information related to the uplink communication indicates the selected path.

[0190] Aspect 35: The method of any one of aspects 27-34, wherein a format of downlink control information related to uplink communications indicates the selected path, wherein the format is specific for sidelink reporting.

[0191] Aspect 36: The method of aspect 35, wherein when the format of the downlink control information is indistinguishable from another format of the downlink control information, the selected path is determined based at least in part on a priority rule.

[0192] Aspect 37: The method of any of Aspects 27-36, wherein selecting a path for uplink communications further comprises: selecting a path based at least in part on a priority level associated with the uplink communications.

[0193] Aspect 38: The method of aspect 37, wherein the priority level is associated with a HARQ codebook or a scheduling request configuration associated with uplink communication.

[0194] Aspect 39: The method of Aspect 37, wherein the priority level is indicated by uplink / downlink control information triggering CSI feedback.

[0195] Aspect 40: The method of aspect 37, wherein the first path is determined when the priority level is associated with a first priority, and the second path is determined when the priority level is associated with a second priority, wherein the first priority is higher than the second priority.

[0196] Aspect 41: The method of any one of Aspects 27-40, further comprising: transmitting configuration information indicating a rule for selecting a path.

[0197] Aspect 42: The method of Aspect 41, wherein the rule is based at least in part on a threshold payload size.

[0198] Aspect 43: The method of Aspect 41, wherein the rule is based at least in part on a threshold code rate.

[0199] Aspect 44: The method of Aspect 41, wherein the rule is based at least in part on a modulation and coding scheme (MCS) index.

[0200] Aspect 45: The method of aspect 41, wherein the rule is based at least in part on a parameter in downlink control information related to uplink communications.

[0201] Aspect 46: The method of Aspect 41, wherein the rule indicates that a specific path is to be selected.

[0202] Aspect 47: The method of Aspect 41, wherein the rule is based at least in part on a CSI type of the CSI feedback.

[0203] Aspect 48: The method of any of Aspects 27-47, wherein the uplink communication is associated with a configured uplink transmission, and wherein the method further comprises: configuring the selection of the path via radio resource control signaling.

[0204] Aspect 49: A method as in Aspect 48, wherein, when the configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is configured per scheduling request configuration or per CG-PUSCH transmission configuration.

[0205] Aspect 50: A method as in aspect 48, wherein, when the configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is based at least in part on a priority level of the scheduling request or the CG-PUSCH.

[0206] Aspect 51: The method of aspect 48, wherein when the configured uplink transmission is associated with CSI feedback, the selection is based at least in part on a priority level of the CSI feedback or a configured path for the CSI feedback.

[0207] Aspect 52: 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 a method as in one or more of Aspects 1-51.

[0208] Aspect 53: A device 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 the method of one or more aspects of aspects 1-51.

[0209] Aspect 54: An apparatus for wireless communication, comprising at least one means for performing the method of one or more aspects of aspects 1-51.

[0210] Aspect 55: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-51.

[0211] Aspect 56: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method as in one or more aspects of aspects 1-51.

[0212] The foregoing disclosure provides illustration and description, 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 above disclosure or may be acquired by practice of the various aspects.

[0213] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. "Software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description language or other terms. As used herein, processors are implemented with hardware, and / or a combination of hardware and software. It will be obvious that the systems and / or methods described herein can be implemented in different forms of hardware, and / or a combination of hardware and software. The actual dedicated control hardware or software code for implementing these systems and / or methods does not limit various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes--it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0214] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0215] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or undisclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. As used herein, the phrase quoting "at least one of" a column of items 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, and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other sorting of a, b and c).

[0216] Elements, actions or instructions used herein should not be interpreted as key or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more projects, and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more projects quoted in conjunction with the article "the", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set (set)" and "group" are intended to include one or more projects (for example, a combination of related items, non-related items, or related items and non-related items), and can be used interchangeably with "one or more". In the occasion of intending to have only one project, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including" etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a sequence is intended to be inclusive and may be used interchangeably with "and / or" unless explicitly stated otherwise (e.g., when used in conjunction with "either of" or "only one of").

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: selecting a path for uplink communications associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or channel state information (CSI) feedback from a first path and a second path, wherein the first path is on an uplink of the UE and the second path is on a sidelink of the UE; selecting a different path from the first path and the second path for retransmission of the uplink communication; as well as The uplink communication is transmitted over the selected path, wherein the retransmission of the uplink communication is performed over the selected different path when the transmission of the uplink communication over the selected path is unsuccessful.

2. The method of claim 1, wherein selecting the path for the uplink communication is based at least in part on a dynamic determination.

3. The method of claim 1 , wherein selecting the path for the uplink communication further comprises: The path is selected based at least in part on a field of downlink control information associated with the CSI feedback or a downlink shared channel associated with the HARQ feedback.

4. The method of claim 1 , wherein selecting the path for the uplink communication further comprises: The path is selected based at least in part on a radio network temporary identifier associated with a downlink control channel related to the uplink communication.

5. The method of claim 1 , wherein selecting the path for the uplink communication further comprises: The path is selected based at least in part on a set of control resources associated with a downlink control channel related to the uplink communication.

6. The method of claim 1 , wherein selecting the path for the uplink communication further comprises: The path is selected based at least in part on a search space associated with candidates associated with downlink control information related to the uplink communication.

7. The method of claim 6, wherein: When the candidate is associated with two or more search spaces, selecting the path for the uplink communication further includes selecting the path based at least in part on a priority rule.

8. The method of claim 1 , wherein selecting a path for uplink communication further comprises: The path is selected based at least in part on a size of downlink control information associated with the uplink communication.

9. The method of claim 1 , wherein selecting the path for the uplink communication further comprises: The path is selected based at least in part on a format of downlink control information associated with the uplink communication, wherein the format is specific for sidelink reporting.

10. The method of claim 9, wherein: When the format of the downlink control information is indistinguishable from another format of downlink control information, selecting the path for the uplink communication further includes selecting the path based at least in part on a priority rule.

11. The method of claim 1 , wherein selecting the path for the uplink communication further comprises: The path is selected based at least in part on a priority level associated with the uplink communication.

12. The method of claim 11, wherein the priority level is associated with a HARQ codebook or a scheduling request configuration associated with the uplink communication.

13. The method of claim 11, wherein the priority level is indicated by downlink control information that triggers the CSI feedback.

14. The method of claim 11, wherein the first path is selected when the priority level is associated with a first priority, and the second path is selected when the priority level is associated with a second priority, wherein the first priority is higher than the second priority.

15. The method of claim 1, further comprising: Configuration information indicating a rule for selecting the path is received, wherein the path is selected according to the rule.

16. The method of claim 15, wherein the rule is based at least in part on at least one of: Threshold payload size, Threshold bit rate, Modulation and Coding Scheme (MCS) index, or The CSI type of the CSI feedback.

17. The method of claim 15, wherein the rule is based at least in part on a parameter in downlink control information related to the uplink communication.

18. The method of claim 15, wherein the rule indicates that a particular path is to be selected.

19. The method of claim 1, wherein the uplink communication is associated with a configured uplink transmission, and wherein selection of the path is configured via radio resource control signaling.

20. The method of claim 19, wherein: When the configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is configured per scheduling request configuration or per CG-PUSCH transmission.

21. The method of claim 19, wherein: When the configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is based at least in part on a priority level of the scheduling request or the CG-PUSCH.

22. The method of claim 19, wherein: When the configured uplink transmission is associated with the CSI feedback, the selecting is based at least in part on a priority level of the CSI feedback or a configured path for the CSI feedback.

23. The method of claim 1, wherein selecting the path further comprises: Selecting the first path for initial transmission of the uplink communication, wherein selecting the different path further comprises: The second path is selected for retransmission of the initial transmission.

24. A wireless communication method performed by a network entity, comprising: selecting a path for uplink communications from a remote user equipment (UE) from a first path and a second path, wherein the uplink communications are associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or with channel state information (CSI) feedback, and wherein the first path is on an uplink of the remote UE and the second path is on a sidelink of the remote UE; selecting a different path from the first path and the second path for retransmission of the uplink communication; as well as The uplink communication is received based at least in part on the selected path or the retransmission of the uplink communication is received based at least in part on the selected different path.

25. The method of claim 24, wherein: A candidate is associated with downlink control information related to the uplink, and wherein, when the candidate is associated with two or more search spaces, selecting the path for the uplink communication further comprises selecting the path based at least in part on a priority rule.

26. The method of claim 24, further comprising: Configuration information indicating rules for selecting the path is transmitted.

27. A user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the one or more processors configured to: selecting a path for uplink communications associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or channel state information (CSI) feedback from a first path and a second path, wherein the first path is on an uplink of the UE and the second path is on a sidelink of the UE; selecting a different path from the first path and the second path for retransmission of the uplink communication; as well as The uplink communication is transmitted over the selected path, wherein the retransmission of the uplink communication is performed over the selected different path when the transmission of the uplink communication over the selected path is unsuccessful.

28. The UE of claim 27, wherein selecting the path for the uplink communication is based at least in part on a dynamic determination.

29. The UE of claim 27, wherein the one or more processors are configured to select the path for the uplink communication further comprises: The one or more processors are configured to select the path based at least in part on a field of downlink control information associated with the CSI feedback or a downlink shared channel associated with the HARQ feedback.

30. The UE of claim 27, wherein the one or more processors are configured to select the path for the uplink communication further comprises: The one or more processors are configured to select the path based at least in part on a radio network temporary identifier associated with a downlink control channel related to the uplink communication.

31. The UE of claim 27, wherein the one or more processors are configured to select the path for the uplink communication further comprises: The one or more processors are configured to select the path based at least in part on a set of control resources associated with a downlink control channel related to the uplink communication.

32. The UE of claim 27, wherein the one or more processors are configured to select the path for the uplink communication further comprises: The one or more processors are configured to select the path based at least in part on a search space associated with candidates associated with downlink control information related to the uplink communication.

33. The UE according to claim 32, wherein: When the candidate is associated with two or more search spaces, the one or more processors configured to select the path for the uplink communication further includes the one or more processors configured to select the path based at least in part on a priority rule.

34. The UE of claim 27, wherein the one or more processors are configured to select the path for the uplink communication further comprises: The one or more processors are configured to select the path based at least in part on a size of downlink control information related to the uplink communication.

35. The UE of claim 27, wherein the one or more processors are configured to select the path for the uplink communication further comprises: The one or more processors are configured to select the path based at least in part on a format of downlink control information related to the uplink communication, wherein the format is specific for sidelink reporting.

36. The UE according to claim 35, wherein: When the format of the downlink control information is indistinguishable from another format of downlink control information, the one or more processors being configured to select the path for the uplink communication further includes the one or more processors being configured to select the path based at least in part on a priority rule.

37. The UE of claim 27, wherein the one or more processors are configured to select the path for the uplink communication further comprises: The one or more processors are configured to select the path based at least in part on a priority level associated with the uplink communication.

38. The UE of claim 37, wherein the priority level is associated with a HARQ codebook or a scheduling request configuration associated with the uplink communication.

39. The UE of claim 37, wherein the priority level is indicated by downlink control information triggering the CSI feedback.

40. The UE of claim 37, wherein the first path is selected when the priority level is associated with a first priority, and the second path is selected when the priority level is associated with a second priority, wherein the first priority is higher than the second priority.

41. The UE of claim 27, wherein the one or more processors are further configured to: Configuration information indicating a rule for selecting the path is received, wherein the path is selected according to the rule.

42. The UE of claim 41 , wherein the rule is based at least in part on at least one of: Threshold payload size, Threshold bit rate, Modulation and Coding Scheme (MCS) index, or The CSI type of the CSI feedback.

43. The UE of claim 41, wherein the rule is based at least in part on a parameter in downlink control information related to the uplink communication.

44. The UE of claim 41, wherein the rule indicates that a specific path is to be selected.

45. The UE of claim 27, wherein the uplink communication is associated with a configured uplink transmission, and wherein selection of the path is configured via radio resource control signaling.

46. ​​The UE according to claim 45, wherein: When the configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is configured per scheduling request configuration or per CG-PUSCH transmission.

47. The UE according to claim 45, wherein: When the configured uplink transmission is associated with a scheduling request or a configured grant physical uplink shared channel (CG-PUSCH), the selection is based at least in part on a priority level of the scheduling request or the CG-PUSCH.

48. The UE according to claim 45, wherein: When the configured uplink transmission is associated with the CSI feedback, the selecting is based at least in part on a priority level of the CSI feedback or a configured path for the CSI feedback.

49. A network entity for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the one or more processors configured to: selecting a path for uplink communications from a remote user equipment (UE) from a first path and a second path, wherein the uplink communications are associated with at least one of a variable payload size for hybrid automatic repeat request (HARQ) feedback or with channel state information (CSI) feedback, and wherein the first path is on an uplink of the remote UE and the second path is on a sidelink of the remote UE; selecting a different path from the first path and the second path for retransmission of the uplink communication; as well as The uplink communication is received based at least in part on the selected path or the retransmission of the uplink communication is received based at least in part on the selected different path.

50. The network entity of claim 49, wherein the candidate is associated with downlink control information related to the uplink, and wherein, When the candidate is associated with two or more search spaces, the one or more processors configured to select the path for the uplink communication further includes the one or more processors configured to select the path based at least in part on a priority rule.

51. The network entity of claim 49, wherein the one or more processors are configured to: Configuration information indicating rules for selecting a path for the uplink communication is transmitted.

Images