Sidelink feedback channel repetition

Abstract

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) can transmit a first physical sidelink shared channel (PSSCH) transmission to a second UE. The first UE can select, for a second PSSCH transmission, a PSSCH resource of the first UE for which a corresponding physical sidelink feedback channel (PSFCH) resource does not collide with one of multiple PSFCH transmissions associated with the first PSSCH transmission according to a repetition factor. The first UE can transmit the second PSSCH transmission to the second UE via the PSSCH resource. Numerous other aspects are described.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to U.S. non-provisional patent application No. 17 / 179,203, filed February 18, 2021, entitled “SIDELINK FEEDBACK CHANNEL REPETITIONS,” which is hereby expressly incorporated herein by reference.

[0003] open field

[0004] Various aspects of this disclosure generally relate to wireless communication, and specifically to techniques and apparatus for sidelink feedback channel repetition. Background Technology

[0005] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is an enhancement set of the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0006] A wireless network may include several base stations (BSs) capable of supporting communication for several user equipments (UEs). UEs may communicate with the BS via downlinks and uplinks. A "downlink" (or "forward link") refers to the communication link from the BS to the UE, while an "uplink" (or "reverse link") refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a B-node, gNB, access point (AP), radio headend, transmit / receive point (TRP), new radio (NR) BS, 5G B-node, etc.

[0007] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different user equipment to communicate at the city, country, region, and even global levels. NR (which can also be referred to as 5G) is an enhancement set of the LTE mobile standard issued by 3GPP. NR is designed to better support mobile broadband Internet access by using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) (CP-OFDM) on the downlink (DL), and using CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation to improve spectral efficiency, reduce costs, improve service, utilize new spectrum, and better integrate with other open standards. Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to grow.

[0008] Overview

[0009] In some aspects, a wireless communication method performed by a first UE includes: receiving sidelink communication from a second UE via a sidelink channel between the first UE and the second UE; and transmitting a physical sidelink feedback channel (PSFCH) with repetition to the second UE based at least in part on the sidelink communication.

[0010] In some aspects, a wireless communication method performed by a first UE includes: transmitting sidelink communication to a second UE via a sidelink channel between the first UE and the second UE; and receiving a PSFCH with a repetition amount from the second UE based at least in part on the sidelink communication.

[0011] In some aspects, a first UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive sidelink communication from the second UE via a sidelink channel between the first UE and the second UE; and transmit a PSFCH with a repetition amount to the second UE based at least in part on the sidelink communication.

[0012] In some aspects, a first UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: transmit sidelink communication to the second UE via a sidelink channel between the first UE and the second UE; and receive a PSFCH with a repetition amount from the second UE based at least in part on the sidelink communication.

[0013] In some aspects, a wireless communication method performed by a first UE includes: transmitting a first physical side link shared channel (PSSCH) transmission to a second UE; selecting a PSSCH resource for the second PSSCH transmission that does not conflict with one of a plurality of PSSCH transmissions associated with the first PSSCH transmission based on a repetition factor; and transmitting the second PSSCH transmission to the second UE via the PSSCH resource.

[0014] In some aspects, a wireless communication method performed by a first UE includes: receiving a first PSSCH transmission from a second UE; and receiving a second PSSCH transmission from the second UE at least in part based on the first PSSCH transmission via a PSSCH resource that does not conflict with one of a plurality of PSSCH transmissions according to a repetition factor via its corresponding PSFCH resource.

[0015] In some aspects, a first UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: transmit a first PSSCH transmission to a second UE; select a PSSCH resource for the second PSSCH transmission whose corresponding PSFCH resource does not conflict with one of a plurality of PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor; and transmit the second PSSCH transmission to the second UE via the PSSCH resource.

[0016] In some aspects, a first UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive a first PSSCH transmission from a second UE; and receive a second PSSCH transmission from the second UE at least in part based on the first PSSCH transmission via a PSSCH resource that does not conflict with one of a plurality of PSSCH transmissions according to a repetition factor via its corresponding PSFCH resource.

[0017] In some aspects, a non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a first UE, cause the first UE to: receive sidelink communication from a second UE via a sidelink channel between the first UE and a second UE; and transmit a PSFCH with a repetition amount to the second UE based at least in part on the sidelink communication.

[0018] In some aspects, a non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to: transmit sidelink communication to a second UE via a sidelink channel between the first UE and a second UE; and receive a PSFCH with a repetition amount from the second UE, at least in part based on the sidelink communication.

[0019] In some aspects, a non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to: transmit a first PSSCH transmission to a second UE; select a PSSCH resource for the second PSSCH transmission whose corresponding PSFCH resource does not conflict with one of a plurality of PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor; and transmit the second PSSCH transmission to the second UE via the PSSCH resource.

[0020] In some aspects, a non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to: receive a first PSSCH transmission from a second UE; and receive a second PSSCH transmission from the second UE, at least in part, based on the first PSSCH transmission via a PSSCH resource that does not conflict with one of a plurality of PSSCH transmissions according to a repetition factor, through its corresponding PSFCH resource.

[0021] In some aspects, a first device for wireless communication includes: means for receiving sidelink communication from a second device via a sidelink channel between the first device and the second device; and means for transmitting a PSFCH with a repetition amount to the second device based at least in part on the sidelink communication.

[0022] In some aspects, a first device for wireless communication includes: means for transmitting sidelink communication to a second device via a sidelink channel between the first device and the second device; and means for receiving a PSFCH with a repetition amount from the second device, at least in part based on the sidelink communication.

[0023] In some aspects, a first device for wireless communication includes: means for transmitting a first PSSCH transmission to a second device; means for selecting a PSSCH resource for the second PSSCH transmission whose corresponding PSFCH resource does not conflict with one of a plurality of PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor; and means for transmitting the second PSSCH transmission to the second device via the PSSCH resource.

[0024] In some aspects, a first device for wireless communication includes: means for receiving a first PSSCH transmission from a second device; and means for receiving a second PSSCH transmission from the second device, at least in part, based on the first PSSCH transmission via PSSCH resources that do not conflict with one of a plurality of PSSCH transmissions according to a repetition factor, through its corresponding PSFCH resources.

[0025] The aspects generally include, as substantially described herein with reference to the accompanying drawings and description, methods, apparatus, systems, computer program products, non-transient computer-readable media, user equipment, base stations, wireless communication equipment, and / or processing systems.

[0026] The foregoing has broadly outlined the features and technical advantages of the examples according to this disclosure in an effort to facilitate a better understanding of the following detailed description. Additional features and advantages will be described thereafter. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for implementing the same purposes as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, in both their organization and manner of operation, and their associated advantages, will be better understood by considering the following description in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and not for defining limitations on the claims. Brief description of the attached diagram

[0028] To gain a more detailed understanding of the features described above in this disclosure, reference can be made to various aspects of the above brief overview, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should not be considered as limiting its scope, as other equivalent aspects are permissible in this description. Identical reference numerals in different drawings may identify the same or similar elements.

[0029] Figure 1 This is a diagram illustrating an example of a wireless network according to this disclosure.

[0030] Figure 2 This is a diagram illustrating an example of communication between a base station and a UE in a wireless network according to this disclosure.

[0031] Figure 3 This is a diagram illustrating an example of sidelink communication according to this disclosure.

[0032] Figure 4 This is a diagram illustrating examples of sidelink communication and access link communication according to this disclosure.

[0033] Figure 5 This is a diagram illustrating an example of a sidelink channel according to this disclosure.

[0034] Figure 6 This is a diagram illustrating an example of determining the Physical Side Link Feedback Channel (PSFCH) according to this disclosure.

[0035] Figure 7 This is a diagram illustrating an example of a PSFCH conflict according to this disclosure.

[0036] Figure 8-13 This is a diagram illustrating an example of repeated association with a sidelink feedback channel according to this disclosure.

[0037] Figure 14-17 This is a diagram illustrating an example process associated with repeated sidelink feedback channel according to this disclosure.

[0038] Figure 18 This is a block diagram of an example device for wireless communication according to the present disclosure.

[0039] Detailed description

[0040] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be implemented in many different forms and should not be construed as being limited to any specific structure or function given throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or method of practice. Furthermore, the scope of this disclosure is intended to cover such apparatus or methods practiced using additional structures, functionalities, or structures and functionalities that complement or supplement the various aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be implemented by one or more elements of the claims.

[0041] Several aspects of a telecommunications system will now be described with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and explained in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0042] It should be noted that although the aspects herein may be described using terms commonly associated with 5G or NR radio access technology (RAT), the aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0043] Figure 1 This is a diagram illustrating an example of a wireless network 100 according to this disclosure. The wireless network 100 may be a 5G (NR) network and / or an LTE network, etc., or may include elements thereof. The wireless network 100 may include several base stations 110 (shown as BS110a, BS110b, BS110c, and BS110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, B-node, gNB, 5G B-node (NB), access point, transmit / receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0044] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. Macrocells can cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs with a service subscription. Picocells can cover a relatively small geographic area and allow unrestricted access by UEs with a service subscription. Femtocells can cover a relatively small geographic area (e.g., a residential area) and allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG)). A BS used for macrocells may be referred to as a macro BS. A BS used for picocells may be referred to as a pico BS. A BS used for femtocells may be referred to as a femto BS or a home BS. Figure 1 In the example shown, BS110a can be a macro BS for macro cell 102a, BS110b can be a pico BS for pico cell 102b, and BS110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “B node,” “5G NB,” and “cell” are used interchangeably herein.

[0045] In some respects, the cell may not be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some respects, BSs may interconnect with each other and / or interconnect to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections or virtual networks, using any suitable transport network).

[0046] The wireless network 100 may also include a relay station. A relay station is an entity capable of receiving data transmissions from an upstream station (e.g., a BS or a UE) and transmitting those data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying transmissions for other UEs. Figure 1 In the example shown, relay BS110d can communicate with macro BS110a and UE 120d to facilitate communication between BS110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, relay, etc.

[0047] Wireless network 100 can be a heterogeneous network comprising different types of Base Stations (BSs) such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs may have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0048] Network controller 130 can be coupled to a set of BSs and can provide coordination and control over these BSs. Network controller 130 can communicate with each BS via backhaul. These BSs can also communicate with each other directly or indirectly, for example, via wireless or wired backhaul.

[0049] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE may be a cellular phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet, camera, gaming device, netbook, smartbook, ultrabook, medical device or equipment, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), entertainment device (e.g., music or video device, or satellite radio), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0050] Some UEs may be considered Machine-Type Communication (MTC) UEs, or evolved or enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, instruments, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes may provide connectivity to or to a network (e.g., a wide area network, such as the Internet or a cellular network) via wired or wireless communication links, for example. Some UEs may be considered Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs may be considered Customer Premises Equipment (CPE). UE 120 may be included within a housing that houses components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0051] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0052] In some respects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary). For example, UEs 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), and / or mesh networks. In this scenario, UEs 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as performed by base station 110.

[0053] Devices in the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices in the wireless network 100 can communicate using an operating band with a first frequency range (FR1) and / or an operating band with a second frequency range (FR2), where the first frequency range (FR1) spans from 410 MHz to 7.125 GHz and the second frequency range (FR2) spans from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as intermediate frequency bands. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as the "sub-6 GHz" band. Similarly, although different from the extremely high frequency (EHF) band (30 GHz–300 GHz) designated as the "millimeter wave" band by the International Telecommunication Union (ITU), FR2 is often referred to as the "millimeter wave" band. Therefore, unless otherwise stated, it should be understood that, if used herein, the terms "sub-6 GHz" and the like can broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or intermediate frequency band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise stated, it should be understood that, if used herein, the terms "millimeter wave" and the like can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequency band frequencies (e.g., less than 24.25 GHz). It is conceivable that the frequencies included in FR1 and FR2 can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0054] As indicated above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 The example described.

[0055] Figure 2 This is a diagram illustrating an example 200 of communication between a base station 110 and a UE 120 in a wireless network 100 according to this disclosure. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, wherein generally T≥1 and R≥1.

[0056] At base station 110, transmit processor 220 can receive data destined for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQI) received from each UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. Transmit processor 220 can also process system information (e.g., semi-static resource allocation information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling), and provide overhead symbols and control symbols. Transmit processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can process its respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t, respectively.

[0057] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM) to obtain received symbols. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on these received symbols where applicable, and provide detected symbols. Receiver processor 258 can process (e.g., demodulate and decode) these detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine parameters such as Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), and / or Channel Quality Indicator (CQI). In some respects, one or more components of the UE 120 may be included in the housing 284.

[0058] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0059] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include, or be included therein, one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays. 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 multiple antenna elements within housings. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include elements coupled to one or more transmission and / or reception components (such as...). Figure 2 One or more antenna elements (one or more components).

[0060] On the uplink, at UE 120, transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., reports including RSRP, RSSI, RSRQ, and / or CQI). Transmit processor 264 can also generate reference symbols for one or more reference signals. Symbols from transmit processor 264 may be pre-encoded by TX MIMO processor 266 where applicable, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, modulators and demodulators (e.g., MOD / DEMOD 254) of UE 120 may be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antennas 252, modulators and / or demodulators 254, MIMO detectors 256, receiver processors 258, transmitter processors 264, and / or TX MIMO processors 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as referenced. Figure 8-17 As described.

[0061] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 where applicable, and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 for downlink and / or uplink communications. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antennas 234, modulators and / or demodulators 232, MIMO detectors 236, receiver processors 238, transmitter processors 220, and / or TX MIMO processors 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, for example, as referenced. Figure 8-17 As described.

[0062] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component may perform one or more techniques associated with sidelink feedback channel repetition, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component may execute or direct, for example Figure 14 Process 1400 Figure 15 Process 1500 Figure 16 Process 1600 Figure 17 The operation of process 1700 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120 (e.g., direct execution, or execution after compilation, transformation, and / or interpretation), the one or more processors, UE 120, and / or base station 110 may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 14 Process 1400 Figure 15 Process 1500 Figure 16 Process 1600 Figure 17 The operation of process 1700, and / or other processes described herein. In some respects, the execution instructions may include run instructions, translate instructions, compile instructions, and / or interpret instructions, etc.

[0063] In some aspects, the first UE (e.g., UE 120a) includes: means for receiving sidelink communication from the second UE via a sidelink channel between the first UE and the second UE (e.g., UE 120e); and / or means for transmitting a PSFCH with a repetition amount to the second UE, at least in part based on the sidelink communication. Means for the first UE to perform the operations described herein may include, for example, one or more of antenna 252, demodulator 254, MIMO detector 256, receiver processor 258, transmitter processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, or memory 282.

[0064] In some respects, the first UE includes means for determining the amount of repetition based at least in part on the number of information bits carried in the PSFCH.

[0065] In some respects, the first UE includes means for determining a configuration for a plurality of thresholds; and means for determining the amount of repetition based at least in part on the plurality of thresholds.

[0066] In some aspects, the first UE includes: means for receiving sidelink control information indicating the amount of repetition from the second UE, wherein the sidelink control information is associated with the scheduling of sidelink communication via a sidelink channel.

[0067] In some respects, the first UE includes means for determining a configuration indicating the periodicity and repetition amount associated with the PSFCH transmission.

[0068] In some aspects, the first UE includes: means for transmitting sidelink communication to the second UE via a sidelink channel between the first UE and the second UE; and / or means for receiving a PSFCH with a repetition amount from the second UE based at least in part on the sidelink communication.

[0069] In some aspects, the first UE includes: means for transmitting sidelink control information indicating the amount of repetition to the second UE, wherein the sidelink control information is associated with the scheduling of sidelink communication via a sidelink channel.

[0070] In some aspects, the first UE includes means for transmitting a first PSSCH transmission to the second UE; means for selecting a PSSCH resource for the second PSSCH transmission whose corresponding PSFCH resource does not conflict with one of a plurality of PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor; and / or means for transmitting the second PSSCH transmission to the second UE via the PSSCH resource.

[0071] In some respects, the first UE includes means for receiving multiple PSFCH transmissions from the second UE based on a repetition factor, at least in part, based on a first PSSCH transmission.

[0072] In some aspects, the first UE includes means for sending a second PSSCH transmission to the second UE based at least in part on receiving a plurality of PSFCH transmissions from the second UE according to a repetition factor.

[0073] In some aspects, the first UE includes means for sending a second PSSCH transmission associated with a second resource pool to the second UE based at least in part on the first PSSCH transmission, regardless of whether the second UE receives multiple PSFCH transmissions based on a repetition factor.

[0074] In some aspects, the first UE includes means for receiving a first PSSCH transmission from the second UE; and / or means for receiving a second PSSCH transmission from the second UE, at least in part, based on the first PSSCH transmission via a PSSCH resource that does not conflict with one of a plurality of PSSCH transmissions according to a repetition factor, via its corresponding PSFCH resource.

[0075] In some respects, the first UE includes means for transmitting a plurality of PSFCH transmissions to the second UE based on a repetition factor, at least in part based on the first PSSCH transmission.

[0076] In some aspects, the first UE includes means for receiving a second PSSCH transmission from the second UE based at least in part on transmitting a plurality of PSFCH transmissions to the second UE according to a repetition factor.

[0077] In some aspects, the first UE includes means for receiving a second PSSCH transmission associated with a second resource pool from the second UE based at least in part on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on a repetition factor are transmitted to the second UE.

[0078] although Figure 2 The boxes in the diagram are interpreted as different components, but the functions described above with respect to these boxes can be implemented using a single hardware component, software component, or combination of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by controller / processor 280 or under the control of controller / processor 280.

[0079] As indicated above, Figure 2 This is provided as an example. Other examples may differ from the one provided. Figure 2 The example described.

[0080] Figure 3 This is a diagram illustrating example 300 of sidelink communication according to this disclosure.

[0081] like Figure 3As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. UE 305-1 and UE 305-2 can use one or more sidelink channels 310 to communicate for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, vehicle-to-person (V2P) communication, mesh networking, etc.), etc. In some aspects, UE 305 (e.g., UE 305-1 and / or UE 305-2) may correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, the one or more sidelink channels 310 may use a PC5 interface and / or may operate in a high-frequency band (e.g., the 5.9 GHz band). Alternatively or alternatively, UE 305 may use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, symbols, etc.).

[0082] As in Figure 3 As further illustrated, one or more sidelink channels 310 may include a Physical Sidelink Control Channel (PSCCH) 315, a PSSCH 320, and / or a 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) for cellular communication with 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) for cellular communication with 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, spatial resources, etc.), wherein a Transport Block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data. PSFCH 325 can be used to communicate sidelink feedback 340, such as Hybrid Automatic Repeat Request (HARQ) feedback (e.g., ACK / NACK information), Transmit Power Control (TPC), Schedule Request (SR), and so on.

[0083] In some aspects, one or more sidelink channels 310 may use resource pools. For example, specific resource blocks (RBs) may be used across time to transmit scheduling assignments in subchannels (e.g., included in SCI 330). In some aspects, data transmissions associated with scheduling assignments (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, scheduling assignments and associated data transmissions are not transmitted on adjacent RBs.

[0084] In some aspects, UE 305 may operate using a transmission mode in which resource selection and / or scheduling are performed by UE 305 (e.g., rather than base station 110). In some aspects, UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmission. For example, UE 305 may measure Received Signal Strength Indicator (RSSI) parameters (e.g., sidelink-RSSI (S-RSSI) parameters) associated with various sidelink channels; may measure Reference Signal Received Power (RSRP) parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels; may measure Reference Signal Received Quality (RSRQ) parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, etc.; and may select channels for transmitting sidelink communications based at least in part on (these) measurements.

[0085] Alternatively or concurrently, UE 305 may use SCI 330 received in PSCCH 315 (which may indicate the resources used, channel parameters, etc.) to perform resource selection and / or scheduling. Alternatively or concurrently, UE 305 may perform resource selection and / or scheduling by determining the Channel Busy Rate (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating the maximum number of resource blocks available to UE 305 for a particular subframe set).

[0086] In a transmission mode where resource selection and / or scheduling is performed by UE 305, UE 305 may generate sidelink grants, and these grants may be transmitted in SCI 330. Sidelink grants may indicate one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks (e.g., for TB 335) to be used for an upcoming sidelink transmission on PSSCH 320, one or more subframes to be used for an upcoming sidelink transmission, modulation and coding scheme (MCS) to be used for an upcoming sidelink transmission, etc. In some aspects, UE 305 may generate sidelink grants indicating one or more parameters for semi-persistent scheduling (SPS), such as the periodicity of sidelink transmissions. Additionally or alternatively, UE 305 may generate sidelink grants for event-driven scheduling (such as for on-demand sidelink messages).

[0087] As indicated above, Figure 3 This is provided as an example. Other examples may differ from the one provided. Figure 3 The example described.

[0088] Figure 4 This is a diagram illustrating example 400 of sidelink communication and access link communication according to this disclosure.

[0089] like Figure 4 As shown, the transmitting (Tx) / receiving (Rx) UE 405 and the Rx / Tx UE 410 can communicate with each other via a side link, as described above. Figure 3 As further illustrated, in some sidelink modes, base station 110 may communicate with Tx / Rx UE 405 via a first access link. Additionally or alternatively, in some sidelink modes, base station 110 may communicate with Rx / Tx UE 410 via a second access link. Tx / Rx UE 405 and / or Rx / Tx UE 410 may correspond to one or more UEs described elsewhere herein, such as... Figure 1 UE 120. Therefore, the direct link between UEs 120 (e.g., via the PC5 interface) can be referred to as a side link, and the direct link between base station 110 and UE 120 (e.g., via the Uu interface) can be referred to as an access link. Side link communication can be transmitted via the side link, and access link communication can be transmitted via the access link. Access link communication can be downlink communication (from base station 110 to UE 120) or uplink communication (from UE 120 to base station 110).

[0090] As indicated above, Figure 4 This is provided as an example. Other examples may differ from the one provided. Figure 4 The example described.

[0091] Figure 5 This is a diagram illustrating Example 500 of a sidelink channel according to this disclosure.

[0092] like Figure 5 As shown, PSCCH and PSSCH can be associated with multiple resources in the time and frequency domains. PSFCH can be associated with multiple resources in the time and frequency domains. PSCCH and PSSCH can be without a gap. PSCCH and PSSCH can be separated from PSFCH by a gap.

[0093] As indicated above, Figure 5 This is provided as an example. Other examples may differ from the one provided. Figure 5 The example described.

[0094] Figure 6 This is a diagram illustrating Example 600 of determining PSFCH resources according to this disclosure.

[0095] The `periodPSFCHresource` parameter indicates the periodicity of PSFCH transmissions in the sidelink resource pool, measured in slots. The `periodPSFCHresource` parameter can be set to {0, 1, 2, or 4}. When the `periodPSFCHresource` parameter is set to 0, PSFCH transmissions from the UE in the sidelink resource pool are disabled. The UE can transmit a PSFCH in the first slot after the last slot of PSSCH reception; this PSFCH includes PSFCH resources and is at least the number of slots provided by the minimum time slot specified by the `MinTimeGapPSFCH` parameter in the sidelink resource pool. The `rbSetPSFCH` parameter indicates the number of slots in the sidelink resource pool used for PSFCH transmission. The set of physical resource blocks. The number of subchannels (numSubchannel) parameter indicates the N used for the sidelink resource pool. subch The number of sub-channels. The number of PSSCH slots associated with a PSFCH slot can be determined by... This indicates, and can be determined at least in part, based on the periodPSFCHresource parameter. Furthermore, Where α represents an integer value. Furthermore, in This indicates the number of PSFCH physical resource blocks (PRBs) for the sub-channel.

[0096] UE can be from Physical resource block allocation to slot i and sub-channel j One physical resource block, of which And 0≤j≤Nsubch .

[0097] exist Figure 6 In the example shown, It can be equal to 4, which corresponds to the periodicity of PSFCH. Furthermore, N... subch It can be equal to 10, which corresponds to the number of sub-channels used for the sidelink resource pool. Furthermore, Can correspond to It equals 2. In other words, each subchannel can be associated with two PSFCH PRBs, which can correspond to 80 PRBs used for PSFCH. In this example, each subchannel can be associated with two PSFCH PRBs, but PSFCH can be transmitted on one of the PSFCH PRBs.

[0098] As indicated above, Figure 6 This is provided as an example. Other examples may differ from the one provided. Figure 6 The example described.

[0099] HARQ-ACK feedback can be transmitted for NR sidelink communication. For example, a first UE may receive sidelink communication from a second UE, and the first UE may transmit HARQ-ACK feedback to the second UE at least in part based on the sidelink communication. HARQ-ACK feedback may be transmitted on the PSFCH. HARQ-ACK feedback may include an ACK indicating successful sidelink communication or a NACK indicating unsuccessful sidelink communication.

[0100] For sidelink communication, one or more resource pools can be configured with PSFCH resources. Sidelink HARQ-ACK feedback can be sequence-based. Sidelink HARQ-ACK feedback can carry a single bit for each PSFCH, and it can be transmitted over two consecutive symbols. For example, symbols 11 and 12 of a time slot can be used to transmit sidelink HARQ-ACK feedback. A symbol preceding a PSFCH symbol and a symbol following a PSFCH symbol can be assigned to a time slot. Symbol 11 can be used for automatic gain control (AGC) purposes, so the sidelink HARQ-ACK feedback (e.g., a single bit) can be decoded using only one symbol (e.g., symbol 12).

[0101] In NR PSFCH, a one-bit sidelink HARQ-ACK feedback can be transmitted in each PSFCH transmission. In other words, each PSFCH can correspond to a single transport block. In some cases, it may be beneficial to configure the PSFCH to transmit one or more HARQ-ACK bits in a single PSFCH transmission. For example, in carrier aggregation scenarios, the UE can transmit a HARQ-ACK codebook that includes one or more HARQ-ACK bits corresponding to multiple transport blocks in the same PSFCH transmission. As another example, when Block Groups (CBGs) are supported, a transport block can include multiple CBGs, and the UE can transmit one bit of HARQ-ACK feedback for each CBG. As yet another example, the UE can combine the HARQ-ACK bit with additional control information, such as Channel State Information (CSI) or Scheduling Request (SR)).

[0102] Existing PSFCH designs may be insufficient in terms of link budget for transmitting one or more HARQ-ACK bits within the PSFCH. In existing PSFCH designs, the PSFCH can occupy two symbols, one of which is associated with AGC. In other words, in existing PSFCH designs, one of the two symbols in the PSFCH can be an AGC symbol, leaving a single symbol to carry one or more HARQ-ACK bits. Furthermore, the NR-side link may only support CP-OFDM waveforms, and a single PSFCH can occupy a maximum of two OFDM symbols.

[0103] Figure 7 This is a diagram illustrating Example 700 of a PSFCH conflict according to this disclosure.

[0104] Within the resource pool, some UEs can transmit non-repeating PSFCHs. A UE can transmit a non-repeating PSFCH when a single ACK / NACK bit is transmitted. In other words, a single ACK / NACK bit transmitted in a PSFCH transmission can be non-repeating. However, some UEs can transmit PSFCHs with repetition. A UE can transmit a PSFCH with repetition when one or more ACK / NACK bits are transmitted. In other words, one or more ACK / NACK bits associated with the same PSFCH transmission can be repeated. Non-repeating PSFCHs and PSFCHs with repetition can be transmitted within the same PSFCH resource set in the resource pool.

[0105] In some cases, the PSSCH to PSFCH mapping rule can cause two PSSCH transmissions to be mapped to two PSFCH transmission times, where these two PSFCH transmission times can correspond to PSFCH and PSFCH repetitions. In other words, one of the PSSCH transmissions can be mapped to a PSFCH transmission time that already carries a PSFCH repetition, thus causing a collision at the PSFCH transmission time.

[0106] like Figure 7 As shown, the first PSSCH can be associated with a PSFCH transmission and a repetition of the PSFCH transmission. The second PSSCH can be associated with a PSFCH transmission. However, based at least in part on the PSSCH-to-PSFCH mapping rules, a repetition of the PSFCH transmission associated with the first PSSCH can conflict with a PSFCH transmission associated with the second PSSCH. Conflicts between two PSFCH transmissions at the same PSFCH transmission time can negatively impact UE performance.

[0107] As indicated above, Figure 7 This is provided as an example. Other examples may differ from the one provided. Figure 7 The example described.

[0108] In various aspects of the techniques and apparatus described herein, a first UE may transmit a first PSSCH transmission to a second UE. The first UE may receive multiple PSFCH transmissions from the second UE based at least in part on the first PSSCH transmission, according to a repetition factor. The multiple PSFCH transmissions may include one or more HARQ-ACK bits. In some aspects, the multiple PSFCH transmissions may be associated with the number of PSFCH transmissions, wherein this number may be based at least in part on the number of information bits carried in the PSFCH, an indication from the first UE in the last PSSCH transmission (e.g., in the SCI), a pre-configured repetition factor, and / or a priority level associated with one or more HARQ-ACK bits. The PSFCH resources used to transmit the multiple PSFCH transmissions may be associated with the same sidelink time slot, or may be associated with multiple sidelink time slots (e.g., one PSFCH repetition per sidelink time slot). In some aspects, the first UE may select a PSSCH resource for the second PSSCH transmission that does not conflict with one of the multiple PSFCH transmissions associated with the first PSSCH transmission. The first UE may transmit the second PSSCH transmission to the second UE via this PSSCH resource. As a result, the PSFCH resources used to perform the second PSSCH transmission can be repeated without conflict with the PSFCH associated with the first PSSCH transmission, thereby improving the performance of the first UE and / or the second UE. In other words, the PSFCH associated with the second PSSCH transmission can be repeated without conflict with the PSFCH associated with the first PSSCH transmission.

[0109] Figure 8 This is a diagram illustrating example 800 of the sidelink feedback channel repetition according to this disclosure. For example... Figure 8 As shown, Example 800 includes communication between a first UE (e.g., UE 120a) and a second UE (e.g., UE 120e). In some aspects, the first UE and the second UE may be included in a wireless network (such as wireless network 100). In some aspects, the first UE and the second UE may communicate on a sidelink.

[0110] As shown by reference numeral 802 in the attached figure, the first UE can receive sidelink communication from the second UE via a sidelink channel between the first UE and the second UE. For example, the first UE can receive sidelink communication from the second UE via PSSCH or PSCCH.

[0111] As shown by reference numeral 804 in the accompanying figure, the first UE can determine the amount of repetition associated with the PSFCH, which may be based at least in part on sidelink communication received from the second UE. In other words, the first UE can determine the number of repetitions of the PSFCH, which may be based at least in part on whether sidelink communication was successfully received and decoded at the first UE to indicate one or more HARQ-ACK bits. The PSFCH may also indicate other control information on the sidelink, such as sidelink CSI or sidelink scheduling requests. The PSFCH may be retransmitted to improve the sidelink link budget.

[0112] In some aspects, the first UE may determine the repetition amount based at least in part on the number of information bits carried in the PSFCH. The first UE may receive configuration from a base station or a second UE that configures multiple thresholds to determine the repetition amount based at least in part on the number of information bits carried in the PSFCH. In some aspects, the first UE may determine the configuration based at least in part on reception from the base station or at least in part on a pre-configuration of the first UE.

[0113] In some respects, the first UE may determine the repetition amount (e.g., repetition factor) of the PSFCH based at least in part on the number of information bits carried in the PSFCH. The first UE may implicitly derive the repetition amount based at least in part on the number of information bits. For example, a PSFCH with one or two bits may be transmitted without repetition, a PSFCH with K1 bits may be transmitted with two repetitions, and a PSFCH with K1+1 or K2 bits may be transmitted with four repetitions, where K1 and K2 may be predefined values. In some cases, the payload size between 3 and K1 bits may be transmitted using the repetition amount (e.g., two repetitions), the payload size between K1+1 and K2 bits may be transmitted using the repetition amount (e.g., two repetitions), and so on. Furthermore, the threshold used to determine whether a given number of bits is transmitted without repetition, with two repetitions, with four repetitions, etc., may be pre-configured to the first UE (e.g., on a resource pool) or may be hard-coded from the 3GPP specification (e.g., pre-loaded by the first UE).

[0114] In some aspects, the first UE may receive an SCI indicating the amount of repetition from the second UE. The SCI may be associated with the scheduling of sidelink communications via a sidelink channel. In some aspects, the amount of repetition associated with the PSFCH may be indicated by the second UE (e.g., in the SCI scheduling the last PSSCH transmission).

[0115] In some aspects, the repetition amount may be associated with a pre-configured repetition factor. For example, the repetition amount may be associated with a pre-configured repetition factor on a corresponding resource pool. In some aspects, the repetition amount may be associated with a priority level of one or more HARQ-ACK bits or control information indicated in the PSFCH. For example, the first UE may determine a configuration indicating the association between the repetition amount and the priority level of one or more HARQ-ACK bits. In some aspects, the first UE may be configured / pre-configured to have a lookup table that can be used to identify the corresponding repetition number for each of a plurality of priority levels.

[0116] As shown by reference numeral 806 in the accompanying drawing, the first UE may transmit a PSFCH indicating one or more HARQ-ACK bits with repetition to the second UE, at least partially based on sidelink communication. In other words, the first UE may transmit a PSFCH with repetition.

[0117] In some aspects, the first UE can transmit PSFCHs with repetition in a single sidelink time slot. In other aspects, PSFCH resources for transmitting PSFCHs with repetition can be associated with the same sidelink time slot. For example, PSFCH resources can be located on back-to-back OFDM symbols, in which case the number of OFDM symbols allocated to the sidelink PSFCH in the sidelink time slot can be increased compared to the 3GPP Release 16NR sidelink design.

[0118] In some aspects, when transmitting a PSFCH with repetition, the first UE may transmit the repetition in a corresponding number of sidelink time slots, wherein each repetition is transmitted in a respective sidelink time slot. In some aspects, the first UE may transmit a PSFCH with repetition in consecutive sidelink time slots or in consecutive time slots that include PSFCH resources. In some aspects, the PSFCH resources used for transmitting a PSFCH with repetition may be associated with a single repetition in each sidelink time slot. For example, repetitions of PSFCH may be transmitted in several consecutive sidelink time slots or in several consecutive time slots that include PSFCH resources.

[0119] In some aspects, PSFCHs with duplicates may be associated with a first resource set, while PSFCHs without duplicates may be associated with a second resource set different from the first resource set. In some aspects, to avoid conflicts, resources used for transmitting PSFCHs with duplicates may be configured in a separate resource set from resources used for transmitting other PSFCHs without duplicates. For example, PSFCH duplicates may be transmitted in different time slots or in different resource blocks compared to other PSFCHs without duplicates.

[0120] In some respects, the first UE can determine the configuration indicating the periodicity and repetition amount associated with PSFCH transmission. In other words, for PSFCH repetition, the first UE can be configured to have a periodicity N. PSFCH And the amount of repetition (or the repetition factor).

[0121] In some respects, a PSFCH with repetition may include a first PSFCH transmission (i.e., the initial PSFCH transmission) and a PSFCH repetition of the first PSFCH transmission. The first PSFCH transmission may satisfy k mod N. PSFCH =0 time slot t k PSFCH repetition can occur in the same time slot or in time slot t. k+1 Above, where t k+1 It is the next side link time slot starting from the k-th side link time slot (e.g., the (k+1)-th side link time slot). Further, t k The physical slot index can be used to indicate the k-th side link slot, since not all slots are available for side link communication in NR.

[0122] In some aspects, PSSCH can be mapped to a first PSFCH transmission, at least in part, based on mapping rules between PSSCH and PSFCH, such as mapping to the starting resource block of the first PSFCH transmission. In some aspects, the same set of resource blocks can be associated with both the first PSFCH transmission and PSFCH repetition. For example, the same resource blocks can be used for PSFCH repetition. In some aspects, based at least in part on frequency hopping patterns, a first set of resource blocks can be associated with the first PSFCH transmission, while a second set of resource blocks can be associated with PSFCH repetition. Frequency hopping patterns can be defined for PSFCH repetition, where each repetition can occupy a different set of resource blocks. For example, the resource blocks used for PSFCH repetition can be equal to... Where R1 is the resource block index of the first PSFCH transmission, N hop It is a frequency hopping gap, and This refers to the total number of resource blocks in the resource pool used for PSFCH transmission. In some respects, the second set of resource blocks may be determined at least in part based on the source ID and / or destination ID and / or slot / frame index.

[0123] As indicated above, Figure 8 This is provided as an example. Other examples may differ from the one provided. Figure 8 The example described.

[0124] Figure 9 This is a diagram illustrating example 900 of the sidelink feedback channel repetition according to this disclosure.

[0125] like Figure 9 As shown, a single time slot may include 14 symbols. The PSSCH and / or PSCCH within a time slot may occupy the first 8 symbols of the time slot. The PSFCH within a time slot may occupy four symbols of the time slot. The PSFCH and PSSCH / PSCCH may be separated by a one-symbol gap. The PSFCH may carry feedback based at least in part on sidelink communication carried in the PSSCH / PSCCH. In some aspects, the PSFCH may include multiple PSFCH repetitions. For example, the PSFCH may include a first PSFCH repetition occupying two symbols and a second PSFCH repetition occupying two symbols. In this example, multiple PSFCH repetitions may be included in a single time slot. In another example, each PSFCH transmission may be scheduled using one OFDM symbol, and an AGC symbol may be transmitted before the PSFCH repetition (e.g., all PSFCH repetitions). In this example, the UE may transmit one AGC symbol and K OFDM symbols for the PSFCH, where K is a determined repetition factor.

[0126] As indicated above, Figure 9This is provided as an example. Other examples may differ from the one provided. Figure 9 The example described.

[0127] Figure 10 This is a diagram illustrating Example 1000 of the side-link feedback channel repetition according to this disclosure.

[0128] like Figure 10 As shown, the first time slot may include a first PSSCH / PSCCH and a first PSFCH, while the second time slot may include a second PSSCH / PSCCH and a second PSFCH. The first PSFCH may be associated with a repeat of the first PSFCH, and the second PSFCH may be associated with a repeat of the second PSFCH. In this example, a single PSFCH repeat may be included in each time slot.

[0129] As indicated above, Figure 10 This is provided as an example. Other examples may differ from the one provided. Figure 10 The example described.

[0130] Figure 11 This is a diagram illustrating Example 1100 of the side-link feedback channel repetition according to this disclosure.

[0131] like Figure 11 As shown, the UE can be configured to have a periodicity of 4 and a repetition factor of 2, such that the PSFCH can appear in time slot t. k In this example, k mod 4 = 0 or 1. The first PSFCH (PSFCH 1) can be associated with a time slot from a previous PSFCH period for PSFCH repetition, and the second PSFCH (PSFCH 2) can be a time slot for the first PSFCH transmission (i.e., the initial PSFCH transmission) and can correspond to time slot t. k The third PSFCH (PSFCH 3) can be a time slot used for PSFCH repetition and can correspond to time slot t. k+1 PSFCH repetition can be a repetition of the first PSFCH transmission.

[0132] In some respects, the time slots used for the first PSFCH transmission can also be used to transmit non-repeating PSFCHs. However, the time slots used for PSFCH repetitions can be used to transmit PSFCH repetitions (e.g., the time slot can be used only to transmit PSFCH repetitions).

[0133] As indicated above, Figure 11 This is provided as an example. Other examples may differ from the one provided. Figure 11 The example described.

[0134] Figure 12This is a diagram illustrating Example 1200 of the side-link feedback channel repetition according to this disclosure. For example... Figure 12 As shown, Example 1200 includes communication between a first UE (e.g., UE 120a) and a second UE (e.g., UE 120e). In some aspects, the first UE and the second UE may be included in a wireless network (such as wireless network 100). In some aspects, the first UE and the second UE may communicate on a sidelink.

[0135] As shown by reference numeral 1202 in the attached figure, the first UE can send a first PSSCH transmission to the second UE. In other words, the first UE can perform a first PSSCH transmission destined for the second UE.

[0136] In some aspects, the first UE may receive multiple PSFCH transmissions from the second UE based at least in part on the first PSSCH transmission, according to a repetition factor. In other words, the second UE may receive the first PSSCH transmission from the first UE, and at least in part on the first PSSCH transmission, the second UE may transmit multiple PSFCH transmissions to the first UE. The multiple PSFCH transmissions may be associated with a HARQ-ACK feedback including one or more HARQ-ACK bits. The second UE may transmit multiple PSFCH transmissions according to a repetition factor. The second UE may transmit the first PSFCH transmission and multiple repetitions of the first PSFCH transmission based at least in part on the first PSSCH transmission.

[0137] As shown by reference numeral 1204 in the accompanying drawings, a first UE can select PSSCH resources for a second PSSCH transmission destined for a second UE. The first UE can select PSSCH resources whose corresponding PSFCH resources do not conflict with one of a plurality of PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor. In other words, the first UE can select PSSCH resources whose corresponding PSFCH resources do not yet carry the first PSFCH transmission or a repetition of the first PSFCH transmission, which would cause a conflict if used for the second PSSCH transmission. In some aspects, the PSFCH corresponding to the second PSSCH transmission can be transmitted in the same time slot (e.g., by the receiving UE) on a resource block different from the repetition of the PSFCH used for the first PSSCH transmission.

[0138] In some respects, when selecting resources for PSSCH transmission to a second UE, the first UE can avoid using PSSCH resources on the same resources or resource blocks that are duplicated in the PSSCH transmission of the second UE’s previous PSSCH transmission.

[0139] In some respects, the first UE may select PSSCH resources whose corresponding PSSCH resources do not conflict with one of a plurality of PSSCH transmissions, at least in part, based on the priority associated with the second PSSCH transmission not being higher than the priority associated with the first PSSCH transmission, and may avoid using PSSCH resources on resources or resource blocks that are repeated in the PSSCH of the previous PSSCH transmission. In other respects, when the priority of the second PSSCH transmission is greater than the priority of the first PSSCH transmission, the first UE may not be restricted in selecting PSSCH resources.

[0140] As shown by reference numeral 1206 in the accompanying drawings, the first UE may transmit a second PSSCH transmission to the second UE via PSSCH resources. The first UE may transmit the second PSSCH transmission at least in part based on receiving multiple PSFCH transmissions from the second UE according to a repetition factor. The PSSCH resources used to perform the second PSSCH transmission may not correspond to PSFCH resources that conflict with one of the multiple PSFCH transmissions according to a repetition factor associated with the first PSSCH transmission.

[0141] In some aspects, the first UE may send a second PSSCH transmission after receiving multiple PSFCH transmissions from the second UE, at least in part, based on a first PSSCH transmission. In other words, for the first UE performing the first PSSCH transmission, the first UE may not perform the second PSSCH transmission until the first UE receives multiple PSFCH repetitions (e.g., all PSFCH repetitions) of the first PSSCH transmission from the second UE. In this case, the first PSSCH transmission may be a previous PSSCH transmission relative to the second PSSCH transmission.

[0142] In some respects, the first PSSCH transmission and the second PSSCH transmission can be associated with a single resource pool. In this example, when the first PSSCH transmission and the second PSSCH transmission are associated with the same resource pool, the first UE may not perform the second PSSCH transmission until the first UE receives multiple PSFCH repetitions (e.g., all PSFCH repetitions) of the first PSSCH transmission from the second UE. In other words, the first UE may apply a restriction on not transmitting PSSCH before receiving PSFCH repetitions used for the previous PSSCH on a per-resource-pool basis.

[0143] In some respects, for a first PSSCH transmission and a second PSSCH transmission not associated with the same resource pool, the first UE may perform the second PSSCH transmission before receiving multiple PSFCH repetitions of the first PSSCH transmission from the second UE. For example, the first PSSCH transmission may be associated with a first resource pool, and the first UE may send a second PSSCH transmission associated with a second resource pool to the second UE, regardless of whether it receives multiple PSFCH transmissions from the second UE based at least in part on the first PSSCH transmission. In other words, the first UE may still transmit PSSCH in another resource pool without waiting for multiple PSFCH repetitions (e.g., all PSFCH repetitions) for the previous PSSCH transmission to complete.

[0144] As indicated above, Figure 12 This is provided as an example. Other examples may differ from the one provided. Figure 12 The example described.

[0145] Figure 13 This is a diagram illustrating Example 1300 of the sidelink feedback channel repetition according to this disclosure.

[0146] As by Figure 13 As shown, several PSSCH resources can be mapped to PSFCH slots at least in part based on the periodicity associated with the PSFCH slots. For example, the PSFCH can be configured to have a periodicity of two slots. In this case, every two PSSCH slots can be mapped to a PSFCH slot. The UE can transmit a first PSSCH (PSSCH 1) in a first PSSCH resource. The first PSSCH can correspond to a second PSFCH resource (PSFCH 2).

[0147] In some respects, the UE may not transmit subsequent PSSCHs (e.g., any subsequent PSSCHs) until multiple PSFCH repetitions associated with the first PSSCH (e.g., all PSFCH repetitions) have been completed. In other words, the UE may not transmit additional PSSCHs until it receives PSFCH repetitions at least in part based on the first PSSCH.

[0148] In some respects, the UE may choose not to use the second PSSCH (PSSCH 2) for PSSCH transmission because the corresponding PSFCH resource can be mapped to a third PSFCH resource (PSFCH 3), which may conflict with a previous PSFCH transmission associated with the first PSSCH. In other words, because the second PSFCH resource can be used for PSFCH transmission of the first PSSCH and the third PSFCH resource can be used for a repetition of PSFCH transmissions, using the second PSSCH may lead to a conflict at the third PSFCH resource, since the second PSSCH can also be mapped to the third PSFCH resource. As a result, the UE may choose not to use the second PSSCH for PSSCH transmission, thereby avoiding a conflict at the third PSFCH resource.

[0149] As indicated above, Figure 13 This is provided as an example. Other examples may differ from the one provided. Figure 13 The example described.

[0150] Figure 14 This is a diagram illustrating an example process 1400 performed, for example, by a first UE according to this disclosure. Example process 1400 is an example in which the first UE (e.g., UE 120a) performs an operation repeatedly associated with the sidelink feedback channel.

[0151] like Figure 14 As shown, in some aspects, process 1400 may include receiving sidelink communication from the second UE via a sidelink channel between the first UE and the second UE (block 1410). For example, the UE (e.g., using...) Figure 18 The receiving component 1802 described above can receive sidelink communication from the second UE via a sidelink channel between the first UE and the second UE, as described above.

[0152] like Figure 14 As further shown, in some aspects, process 1400 may include at least partially based on the sidelink communication and transmitting a PSFCH with a repetitive amount to the second UE (block 1420). For example, the UE (e.g., using...) Figure 18 The transmission component 1804 described above can communicate at least in part based on the side link and transmit a PSFCH with a repetitive amount to the second UE, as described above.

[0153] Process 1400 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.

[0154] In the first aspect, process 1400 includes determining the amount of repetition based at least in part on the number of information bits carried in the PSFCH.

[0155] In a second aspect, either alone or in combination with the first aspect, process 1400 includes determining a configuration for a plurality of thresholds; and determining the amount of repetition based at least in part on the plurality of thresholds.

[0156] In a third aspect, either alone or in combination with one or more of the first and second aspects, process 1400 includes receiving sidelink control information indicating the amount of repetition from a second UE, wherein the sidelink control information is associated with the scheduling of sidelink communications via a sidelink channel.

[0157] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the amount of repetition is associated with a pre-configured repetition factor.

[0158] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the PSFCH indicates one or more HARQ-ACK bits, and the process 1400 includes a configuration for determining the association between the amount of repetition and the priority level of the one or more HARQ-ACK bits.

[0159] In the sixth aspect, alone or in combination with one or more of the first to fifth aspects, transmitting a PSFCH with a repetition amount includes transmitting a PSFCH with a repetition amount in a single side link time slot.

[0160] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, transmitting a PSFCH with a repetition amount includes transmitting the repetition amount in a corresponding number of side link time slots, wherein each repetition is transmitted in a corresponding side link time slot.

[0161] In the eighth aspect, transmitting a PSFCH with a repetition amount, either alone or in combination with one or more of the first to seventh aspects, includes: transmitting a PSFCH with a repetition amount in a continuous sidelink time slot; or transmitting a PSFCH with a repetition amount in a continuous sidelink time slot that includes PSFCH resources.

[0162] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, PSFCHs with a repeating amount are associated with the first resource set, while PSFCHs without a repeating amount are associated with a second resource set different from the first resource set.

[0163] In the tenth aspect, or in combination with one or more of the first to ninth aspects, time slots for initial PSFCH transmissions are used to transmit PSFCHs that do not repeat, and time slots for PSFCH repetitions are not used to transmit non-PSFCH repetitions.

[0164] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, process 1400 includes determining a configuration indicating the periodicity and repetition amount associated with PSFCH transmission.

[0165] In the twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, a PSFCH with a repetition amount includes a first PSFCH transmission and a PSFCH repetition.

[0166] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the same set of resource blocks is associated with the first PSFCH transmission and PSFCH repetition.

[0167] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the first resource block set is associated with the first PSFCH transmission, while the second resource block set is associated with PSFCH repetition.

[0168] although Figure 14 An example box of process 1400 is shown, but in some respects, process 1400 may include... Figure 14 The boxes depicted in the process are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Additionally or alternatively, two or more boxes in process 1400 can be executed in parallel.

[0169] Figure 15 This is a diagram illustrating an example process 1500 performed, for example, by a first UE according to this disclosure. Example process 1500 is an example in which the first UE (e.g., UE 120a) performs an operation repeatedly associated with the sidelink feedback channel.

[0170] like Figure 15 As shown, in some aspects, process 1500 may include transmitting sidelink communication to the second UE via a sidelink channel between the first UE and the second UE (block 1510). For example, the UE (e.g., using...) Figure 18 The transmission component 1804 described above can transmit sidelink communication to the second UE via a sidelink channel between the first UE and the second UE, as described above.

[0171] like Figure 15 As further shown, in some aspects, process 1500 may include at least partially based on the sidelink communication and receiving a PSFCH with a repetitive amount from the second UE (box 1520). For example, the UE (e.g., using...) Figure 18 The receiving component 1802 described above can communicate at least in part based on the side link and receive a PSFCH with a repetition amount from the second UE, as described above.

[0172] Process 1500 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.

[0173] In the first aspect, the amount of repetition is determined at least in part based on the number of information bits carried in the PSFCH.

[0174] In a second aspect, either alone or in conjunction with the first aspect, process 1500 includes transmitting sidelink control information indicating the amount of repetition to the second UE, wherein the sidelink control information is associated with the scheduling of sidelink communications via the sidelink channel.

[0175] In the third aspect, either alone or in combination with one or more of the first and second aspects, the amount of repetition is associated with a pre-configured repetition factor.

[0176] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the PSFCH indicates one or more HARQ-ACK bits, and the process 1500 includes a configuration for determining the association between the amount of repetition and the priority level of the one or more HARQ-ACK bits.

[0177] In the fifth aspect, alone or in combination with one or more of the first to fourth aspects, receiving a PSFCH with a repetition amount includes receiving a PSFCH with a repetition amount in a single sidelink time slot.

[0178] In the sixth aspect, receiving a PSFCH with a repetition amount, either alone or in combination with one or more of the first to fifth aspects, includes receiving the repetition amount in a corresponding number of side link time slots, wherein each repetition is received in a corresponding side link time slot.

[0179] In the seventh aspect, receiving a PSFCH with a repetition amount, either alone or in combination with one or more of the first to sixth aspects, includes: receiving a PSFCH with a repetition amount in a continuous sidelink time slot; or receiving a PSFCH with a repetition amount in a continuous sidelink time slot that includes PSFCH resources.

[0180] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, PSFCHs with a repeating amount are associated with the first resource set, while PSFCHs without a repeating amount are associated with a second resource set different from the first resource set.

[0181] In the ninth aspect, time slots for initial PSFCH transmissions are used to transmit PSFCHs that do not repeat, either alone or in combination with one or more of the first to eighth aspects, and time slots for repeating PSFCHs are not used to transmit non-PSFCH repeats.

[0182] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, a PSFCH with a repetition amount includes a first PSFCH transmission and a PSFCH repetition.

[0183] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the same set of resource blocks is associated with the first PSFCH transmission and PSFCH repetition.

[0184] In the twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the first resource block set is associated with the first PSFCH transmission, while the second resource block set is associated with PSFCH repetition.

[0185] although Figure 15 An example box of process 1500 is shown, but in some respects, process 1500 may include... Figure 15 The boxes depicted in the process are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Additionally or alternatively, two or more boxes in process 1500 can be executed in parallel.

[0186] Figure 16 This is a diagram illustrating an example process 1600 performed, for example, by a first UE according to this disclosure. Example process 1600 is an example in which the first UE (e.g., UE 120a) performs an operation repeatedly associated with the sidelink feedback channel.

[0187] like Figure 16 As shown, in some aspects, process 1600 may include sending a first PSSCH transmission to a second UE (block 1610). For example, the UE (e.g., using...) Figure 18 The transmission component 1804 described above can send a first PSSCH transmission to the second UE.

[0188] like Figure 16 As further shown, in some aspects, process 1600 may include selecting, for the second PSSCH transmission, a corresponding PSFCH resource that does not conflict with one of a plurality of PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor (box 1620). For example, the UE (e.g., using...) Figure 18 The selection component 1810 described above can select a PSSCH resource for the second PSSCH transmission whose corresponding PSFCH resource does not conflict with one of a plurality of PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor, as described above.

[0189] like Figure 16As further shown, in some aspects, process 1600 may include sending a second PSSCH transmission to a second UE via the PSSCH resource (block 1630). For example, the UE (e.g., using...) Figure 18 The transmission component 1804 described above can send a second PSSCH transmission to the second UE via the PSSCH resource.

[0190] Process 1600 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.

[0191] In a first aspect, process 1600 includes receiving multiple PSFCH transmissions from a second UE based at least in part on a first PSSCH transmission according to a repetition factor.

[0192] In a second aspect, either alone or in conjunction with the first aspect, process 1600 includes sending a second PSSCH transmission to the second UE based at least in part on receiving a plurality of PSFCH transmissions from the second UE according to a repetition factor.

[0193] In the third aspect, either alone or in combination with one or more of the first and second aspects, a second PSSCH transmission is performed after receiving multiple PSFCH transmissions from a second UE based at least in part on a first PSSCH transmission.

[0194] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the first PSSCH transmission and the second PSSCH transmission are associated with a single resource pool.

[0195] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the first PSSCH transmission is associated with the first resource pool, and process 1600 includes sending a second PSSCH transmission associated with the second resource pool to the second UE based at least in part on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on the repetition factor are received from the second UE.

[0196] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, several PSSCH resources are mapped to PSFCH slots at least in part based on the periodicity associated with PSFCH slots.

[0197] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, multiple PSFCH transmissions based on the repetition factor are associated with a HARQ-ACK feedback including one or more HARQ-ACK bits.

[0198] In the eighth aspect, either alone or in combination with one or more of the first to sixth aspects, the PSFCH corresponding to the second PSSCH transmission is transmitted by the second UE in the same time slot on a resource block that is different from the repeat of the PSFCH used for the first PSSCH transmission.

[0199] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the priority associated with the second PSSCH transmission is no higher than the priority associated with the first PSSCH transmission.

[0200] although Figure 16 An example box of process 1600 is shown, but in some respects, process 1600 may include... Figure 16 The boxes depicted in the process are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Additionally or alternatively, two or more boxes in process 1600 can be executed in parallel.

[0201] Figure 17 This is a diagram illustrating an example process 1700 performed, for example, by a first UE according to this disclosure. Example process 1700 is an example in which the first UE (e.g., UE 120a) performs an operation repeatedly associated with the sidelink feedback channel.

[0202] like Figure 17 As shown, in some aspects, process 1700 may include receiving a first PSSCH transmission from a second UE (block 1710). For example, the UE (e.g., using...) Figure 18 The receiving component 1802 depicted above can receive the first PSSCH transmission from the second UE.

[0203] like Figure 17 As further shown, in some aspects, process 1700 may include receiving a second PSSCH transmission from a second UE at least in part based on the first PSSCH transmission via its corresponding PSFCH resource that does not conflict with one of a plurality of PSFCH transmissions according to a repetition factor (box 1720). For example, the UE (e.g., using...) Figure 18 The receiving component 1802 described above can receive a second PSSCH transmission from the second UE at least in part based on the first PSSCH transmission via its corresponding PSFCH resource and a PSSCH resource that does not conflict with one of a plurality of PSFCH transmissions according to a repetition factor, as described above.

[0204] Process 1700 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.

[0205] In a first aspect, process 1700 includes transmitting multiple PSFCH transmissions to a second UE based on a repetition factor, at least in part, based on a first PSSCH transmission.

[0206] In a second aspect, either alone or in conjunction with the first aspect, process 1700 includes receiving a second PSSCH transmission from the second UE based at least in part on transmitting a plurality of PSFCH transmissions to the second UE according to a repetition factor.

[0207] In the third aspect, either alone or in combination with one or more of the first and second aspects, a second PSSCH transmission is received after a plurality of PSFCH transmissions have been transmitted to the second UE based at least in part on a first PSSCH transmission.

[0208] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the first PSSCH transmission and the second PSSCH transmission are associated with a single resource pool.

[0209] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the first PSSCH transmission is associated with the first resource pool, and process 1700 includes receiving a second PSSCH transmission associated with the second resource pool from the second UE based at least in part on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on the repetition factor are transmitted to the second UE.

[0210] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, several PSSCH resources are mapped to PSFCH slots at least in part based on the periodicity associated with PSFCH slots.

[0211] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, multiple PSFCH transmissions based on the repetition factor are associated with a HARQ-ACK feedback including one or more HARQ-ACK bits.

[0212] In the eighth aspect, either alone or in combination with one or more of the first to sixth aspects, the PSFCH corresponding to the second PSSCH transmission is transmitted to the second UE in the same time slot on a resource block that is different from the repeat of the PSFCH used for the first PSSCH transmission.

[0213] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the priority associated with the second PSSCH transmission is no higher than the priority associated with the first PSSCH transmission.

[0214] although Figure 17 An example box of process 1700 is shown, but in some respects, process 1700 may include... Figure 17The boxes depicted in the process are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Additionally or alternatively, two or more boxes in process 1700 can be executed in parallel.

[0215] Figure 18 This is a block diagram of an example device 1800 for wireless communication. Device 1800 may be a first UE, or a first UE may include device 1800. In some aspects, device 1800 includes a receiving component 1802 and a transmitting component 1804, which may be in communication with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1800 may use the receiving component 1802 and the transmitting component 1804 to communicate with another device 1806 (such as a UE, a base station, or another wireless communication device). As further shown, device 1800 may include one or more of a determining component 1808 or a selecting component 1810, etc.

[0216] In some respects, device 1800 can be configured to perform the functions described herein. Figure 8-13 The described one or more operations. Additionally or alternatively, the apparatus 1800 may be configured to perform one or more processes described herein, such as Figure 14 Process 1400 Figure 15 Process 1500 Figure 16 Process 1600 Figure 17 Process 1700 or a combination thereof. In some aspects, device 1800 and / or Figure 18 One or more components shown may include the above combination Figure 2 One or more components of the first UE as described. Additionally or alternatively, Figure 18 One or more components shown can be combined as described above. Figure 2 Implementation within one or more of the described components. Additionally or alternatively, one or more components in the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of that component.

[0217] Receiver 1802 may receive communications (such as reference signals, control information, data communications, or combinations thereof) from device 1806. Receiver 1802 may provide the received communications to one or more other components of device 1800. In some aspects, receiver 1802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.), and may provide the processed signal to one or more other components of device 1806. In some aspects, receiver 1802 may include combinations of the above. Figure 2 The first UE described includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0218] The transmission component 1804 can transmit communications (such as reference signals, control information, data communications, or combinations thereof) to the device 1806. In some aspects, one or more other components of the device 1806 can generate communications and provide the generated communications to the transmission component 1804 for transmission to the device 1806. In some aspects, the transmission component 1804 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, encoding, etc.) on the generated communications and can transmit the processed signals to the device 1806. In some aspects, the transmission component 1804 may include combinations of the above. Figure 2 The first UE described includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 1804 may be co-located with the receive component 1802 in a transceiver.

[0219] The receiving component 1802 can receive sidelink communication from the second UE via a sidelink channel between the first UE and the second UE. The transmitting component 1804 can transmit a PSFCH with repetitions to the second UE based at least in part on the sidelink communication.

[0220] The determining component 1808 can determine the repetition amount based at least in part on the number of information bits carried in the PSFCH. The receiving component 1802 can receive configuration from the base station that configures multiple thresholds for determining the repetition amount based at least in part on the number of information bits carried in the PSFCH. The receiving component 1802 can receive sidelink control information indicating the repetition amount from the second UE, wherein the sidelink control information is associated with the scheduling of sidelink communication via the sidelink channel. The receiving component 1802 can determine the configuration indicating the periodicity and repetition amount associated with PSFCH transmission.

[0221] The transmission component 1804 can transmit sidelink communication to the second UE via a sidelink channel between the first UE and the second UE. The receiving component 1802 can receive a PSFCH with repetition from the second UE based at least in part on the sidelink communication.

[0222] The transmission component 1804 can transmit sidelink control information indicating the amount of repetition to the second UE, wherein the sidelink control information is associated with the scheduling of sidelink communication via the sidelink channel.

[0223] Transmission component 1804 can send a first PSSCH transmission to a second UE. Selection component 1810 can select a PSSCH resource for the second PSSCH transmission whose corresponding PSFCH resource does not conflict with one of a plurality of PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor. Transmission component 1804 can then send the second PSSCH transmission to the second UE via this PSSCH resource.

[0224] The receiving component 1802 may receive multiple PSFCH transmissions from the second UE based at least in part on the first PSSCH transmission, according to a repetition factor. The transmitting component 1804 may send a second PSSCH transmission to the second UE based at least in part on receiving multiple PSFCH transmissions from the second UE according to a repetition factor.

[0225] The receiving component 1802 can receive a first PSSCH transmission from the second UE. The receiving component 1802 can receive a second PSSCH transmission from the second UE at least in part based on the first PSSCH transmission via its corresponding PSFCH resource and a PSSCH resource that does not conflict with one of a plurality of PSFCH transmissions according to a repetition factor.

[0226] The transmission component 1804 can transmit multiple PSFCH transmissions to the second UE based at least in part on the first PSSCH transmission according to a repetition factor. The receiving component 1802 can receive a second PSSCH transmission from the second UE based at least in part on the transmission of multiple PSFCH transmissions to the second UE according to a repetition factor.

[0227] Figure 18 The number and arrangement of components shown are provided as an example. In practice, different arrangements may exist. Figure 18 The components shown are compared to additional components, fewer components, different components, or components arranged differently. Furthermore, Figure 18 The two or more components shown can be implemented within a single component, or Figure 18 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 18 The collection of components shown (e.g., one or more components) can be executed as described by Figure 18The other set of components shown in the diagram performs one or more functions.

[0228] The following provides an overview of some aspects of this disclosure:

[0229] Aspect 1: A wireless communication method performed by a first user equipment (UE), comprising: receiving sidelink communication from a second UE via a sidelink channel between the first UE and a second UE; and transmitting a physical sidelink feedback channel (PSFCH) with a repetition amount to the second UE based at least in part on the sidelink communication.

[0230] Aspect 2: The method of aspect 1 further includes: determining the amount of repetition based at least in part on the number of information bits carried in the PSFCH.

[0231] Aspect 3: The method of aspect 2 further includes: determining a configuration for multiple thresholds; and determining the amount of repetition based at least in part on the multiple thresholds.

[0232] Aspect 4: The method of any one of Aspects 1 to 3 further includes: receiving sidelink control information indicating the amount of repetition from a second UE, wherein the sidelink control information is associated with the scheduling of sidelink communication via a sidelink channel.

[0233] Aspect 5: The method of any one of Aspects 1 to 4, wherein the amount of repetition is associated with a pre-configured repetition factor.

[0234] Aspect 6: The method of any one of Aspects 1 to 5, wherein the PSFCH indicates one or more Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) bits, and the method further includes: determining a configuration for the association between the amount of repeats and the priority level of the one or more HARQ-ACK bits.

[0235] Aspect 7: The method of any one of Aspects 1 to 6, wherein transmitting a PSFCH with a repetition amount includes transmitting a PSFCH with a repetition amount in a single side link time slot.

[0236] Aspect 8: The method of any one of Aspects 1 to 7, wherein transmitting a PSFCH with a repetition amount includes transmitting the repetition amount in a corresponding number of side link time slots, wherein each repetition is transmitted in a corresponding side link time slot.

[0237] Aspect 9: The method of any one of Aspects 1 to 8, wherein transmitting a PSFCH with a repetition includes: transmitting a PSFCH with a repetition in a coherent sidelink time slot; or transmitting a PSFCH with a repetition in a coherent sidelink time slot that includes PSFCH resources.

[0238] Aspect 10: The method of any one of Aspects 1 to 9, wherein a PSFCH with a repeating amount is associated with a first resource set, and a PSFCH without a repeating amount is associated with a second resource set different from the first resource set.

[0239] Aspect 11: The method of any one of Aspects 1 to 10, wherein time slots for initial PSFCH transmission are used to transmit PSFCHs that do not repeat, and time slots for PSFCH repetition are not used to transmit non-PSFCH repetitions.

[0240] Aspect 12: The method of any one of Aspects 1 to 11 further includes: determining a configuration indicating the periodicity and repetition amount associated with the PSFCH transmission.

[0241] Aspect 13: The method of any one of Aspects 1 to 12, wherein the PSFCH with repetition includes a first PSFCH transmission and PSFCH repetition.

[0242] Aspect 14: The method of aspect 13, wherein the same set of resource blocks is associated with the first PSFCH transmission and PSFCH repetition.

[0243] Aspect 15: The method of aspect 13, wherein the first resource block set is associated with the first PSFCH transmission, and the second resource block set is associated with PSFCH repetition.

[0244] Aspect 16: A wireless communication method performed by a first user equipment (UE), comprising: transmitting sidelink communication to a second UE via a sidelink channel between the first UE and a second UE; and transmitting a physical sidelink feedback channel (PSFCH) with repetition at least in part based on the sidelink communication and from the second UE.

[0245] Aspect 17: The method of aspect 16, wherein the amount of repetition is determined at least in part based on the number of information bits carried in the PSFCH.

[0246] Aspect 18: The method of any one of Aspects 16 to 17 further includes: transmitting sidelink control information indicating the amount of repetition to a second UE, wherein the sidelink control information is associated with the scheduling of sidelink communication via a sidelink channel.

[0247] Aspect 19: The method of any one of Aspects 16 to 18, wherein the amount of repetition is associated with a pre-configured repetition factor.

[0248] Aspect 20: The method of any one of Aspects 16 to 19, wherein the PSFCH indicates one or more Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) bits, and the method further includes: determining a configuration for the association between the amount of repeats and the priority level of the one or more HARQ-ACK bits.

[0249] Aspect 21: The method of any one of Aspects 16 to 20, wherein receiving a PSFCH with a repetition amount includes receiving a PSFCH with a repetition amount in a single side link time slot.

[0250] Aspect 22: The method of any one of Aspects 16 to 21, wherein receiving a PSFCH with a repetition amount includes receiving the repetition amount in a corresponding number of side link time slots, wherein each repetition is received in a corresponding side link time slot.

[0251] Aspect 23: The method of any one of Aspects 16 to 22, wherein receiving a PSFCH with a repetition amount includes receiving a PSFCH with a repetition amount in a continuous side link time slot.

[0252] Aspect 24: The method of any one of Aspects 16 to 23, wherein receiving a PSFCH with a repetition amount includes receiving a PSFCH with a repetition amount in a coherent sidelink time slot that includes PSFCH resources.

[0253] Aspect 25: The method of any one of Aspects 16 to 24, wherein a PSFCH with repetition is associated with a first resource set, and a PSFCH without repetition is associated with a second resource set different from the first resource set, and wherein time slots for the initial PSFCH transmission are used to transmit a PSFCH without repetition, and time slots for PSFCH repetition are not used to transmit non-PSFCH repetition.

[0254] Aspect 26: The method of any one of Aspects 16 to 25, wherein the PSFCH with repetition includes a first PSFCH transmission and PSFCH repetition.

[0255] Aspect 27: The method of aspect 26, wherein the same set of resource blocks is associated with the first PSFCH transmission and PSFCH repetition.

[0256] Aspect 28: The method of aspect 26, wherein the first resource block set is associated with the first PSFCH transmission, and the second resource block set is associated with the PSFCH repeat.

[0257] Aspect 29: A wireless communication method performed by a first user equipment (UE) includes: transmitting a first physical side link shared channel (PSSCH) transmission to a second UE; selecting a corresponding physical side link feedback channel (PSFCH) resource for the second PSSCH transmission that does not conflict with one of a plurality of PSSCH transmissions associated with the first PSSCH transmission based on a repetition factor; and transmitting the second PSSCH transmission to the second UE via the PSSCH resource.

[0258] Aspect 30: The method of aspect 29 further includes: receiving multiple PSFCH transmissions from a second UE based on a repetition factor, at least in part, based on a first PSSCH transmission.

[0259] Aspect 31: The method of any one of Aspects 29 to 30 further includes: sending a second PSSCH transmission to the second UE based at least in part on receiving a plurality of PSFCH transmissions from the second UE according to a repetition factor.

[0260] Aspect 32: The method of any one of Aspects 29 to 31, wherein a second PSSCH transmission is performed after receiving a plurality of PSFCH transmissions from a second UE based at least in part on a first PSSCH transmission.

[0261] Aspect 33: The method of any one of Aspects 29 to 32, wherein the first PSSCH transmission and the second PSSCH transmission are associated with a single resource pool.

[0262] Aspect 34: The method of any one of Aspects 29 to 33, wherein the first PSSCH transmission is associated with a first resource pool, and further includes: sending a second PSSCH transmission associated with a second resource pool to a second UE based at least in part on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on a repetition factor are received from the second UE.

[0263] Aspect 35: The method of any one of Aspects 29 to 34, wherein several PSSCH resources are mapped to PSFCH slots at least in part based on periodicity associated with PSFCH slots.

[0264] Aspect 36: The method of any one of Aspects 29 to 35, wherein multiple PSFCH transmissions based on the repetition factor are associated with HARQ-ACK feedback including one or more Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) bits.

[0265] Aspect 37: The method of any one of Aspects 29 to 36, wherein the PSFCH corresponding to the second PSSCH transmission is transmitted by the second UE in the same time slot on a resource block that is different from the repeat of the PSFCH used for the first PSSCH transmission.

[0266] Aspect 38: The method of any one of Aspects 29 to 37, wherein the priority associated with the second PSSCH transmission is not higher than the priority associated with the first PSSCH transmission.

[0267] Aspect 39: A wireless communication method performed by a first user equipment (UE) includes: receiving a first physical side link shared channel (PSSCH) transmission from a second UE; and receiving a second PSSCH transmission from the second UE at least in part based on the first PSSCH transmission via a corresponding physical side link feedback channel (PSFCH) resource that does not conflict with one of a plurality of PSSCH transmissions according to a repetition factor.

[0268] Aspect 40: The method of aspect 39 further includes: transmitting multiple PSFCH transmissions to the second UE based on a repetition factor, at least in part, based on the first PSSCH transmission.

[0269] Aspect 41: The method of any one of Aspects 39 to 40 further includes: receiving a second PSSCH transmission from the second UE based at least in part on transmitting a plurality of PSFCH transmissions to the second UE according to a repetition factor.

[0270] Aspect 42: The method of any one of Aspects 39 to 41, wherein a second PSSCH transmission is received after transmitting a plurality of PSFCH transmissions to a second UE, based at least in part on a first PSSCH transmission.

[0271] Aspect 43: The method of any one of Aspects 39 to 42, wherein the first PSSCH transmission and the second PSSCH transmission are associated with a single resource pool.

[0272] Aspect 44: The method of any one of Aspects 39 to 43, wherein the first PSSCH transmission is associated with a first resource pool, and further includes: receiving a second PSSCH transmission associated with a second resource pool from a second UE based at least in part on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on a repetition factor are transmitted to the second UE.

[0273] Aspect 45: The method of any one of Aspects 39 to 44, wherein several PSSCH resources are mapped to PSFCH slots at least in part based on periodicity associated with PSFCH slots.

[0274] Aspect 46: The method of any one of Aspects 39 to 45, wherein multiple PSFCH transmissions based on the repetition factor are associated with HARQ-ACK feedback including one or more Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) bits.

[0275] Aspect 47: The method of any one of Aspects 39 to 46, wherein the PSFCH corresponding to the second PSSCH transmission is transmitted by the second UE in the same time slot on a resource block that is different from the repeat of the PSFCH used for the first PSSCH transmission.

[0276] Aspect 48: The method of any one of Aspects 39 to 47, wherein the priority associated with the second PSSCH transmission is not higher than the priority associated with the first PSSCH transmission.

[0277] Aspect 49: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform methods as described in one or more of aspects 1-15.

[0278] Aspect 50: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform methods as described in one or more aspects of aspects 1-15.

[0279] Aspect 51: An apparatus for wireless communication, comprising at least one means for performing a method as described in one or more aspects of aspects 1-15.

[0280] Aspect 52: A non-transient computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform methods as described in one or more aspects of aspects 1-15.

[0281] Aspect 53: A non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform methods as described in one or more aspects of aspects 1-15.

[0282] Aspect 54: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform methods as described in one or more aspects of aspects 16-28.

[0283] Aspect 55: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform methods as described in one or more aspects of aspects 16-28.

[0284] Aspect 56: An apparatus for wireless communication, comprising at least one means for performing a method as described in one or more aspects of aspects 16-28.

[0285] Aspect 57: A non-transient computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform methods as described in one or more aspects of aspects 16-28.

[0286] Aspect 58: A non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform methods as described in one or more aspects of aspects 16-28.

[0287] Aspect 59: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform methods as described in one or more aspects of aspects 29-38.

[0288] Aspect 60: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform methods as described in one or more aspects of aspects 29-38.

[0289] Aspect 61: An apparatus for wireless communication, comprising at least one means for performing the method as described in one or more aspects of aspects 29-38.

[0290] Aspect 62: A non-transient computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform methods as described in one or more aspects of aspects 29-38.

[0291] Aspect 63: A non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform methods as described in one or more aspects of aspects 29-38.

[0292] Aspect 64: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform methods as described in one or more aspects of aspects 39-48.

[0293] Aspect 65: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform methods as described in one or more aspects of aspects 39-48.

[0294] Aspect 66: An apparatus for wireless communication, comprising at least one means for performing a method as described in one or more aspects of aspects 39-48.

[0295] Aspect 67: A non-transient computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform methods as described in one or more aspects of aspects 39-48.

[0296] Aspect 68: A non-transient computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform methods as described in one or more aspects of aspects 39-48.

[0297] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the foregoing disclosure or may be obtained through practice.

[0298] As used herein, the term "component" is intended to be broadly interpreted as hardware and / or a combination of hardware and software. "Software" should be broadly interpreted as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, whether referred to as software, firmware, middleware, microcode, hardware description languages, or other terms. As used herein, processors are implemented using hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limited in any way. Thus, the operation and behavior of these systems and / or methods are described herein without reference to any specific software code—it is understood that software and hardware can be designed to implement these systems and / or methods, at least in part, based on the descriptions herein.

[0299] As used in this article, depending on the context, a threshold can refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0300] Although specific combinations of features are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below may be directly subordinated to only one claim, the disclosure of aspects includes each dependent claim being combined with each other claim in this set of claims. As used herein, the phrase “at least one of” refers to any combination of these items, including single members. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination having multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0301] The elements, actions, or instructions used herein should not be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “a certain” are intended to include one or more items and may be used interchangeably with “one or more.” Additionally, as used herein, the article “the” is intended to include one or more items referenced in conjunction with the article “the” and may be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Moreover, as used herein, the terms “have,” “contain,” “include,” etc., are intended to be open-ended terms. Furthermore, the phrase “based on” is intended to mean “at least partially based on” unless otherwise explicitly stated. Moreover, as used herein, the term “or” is intended to be inclusive when used in a sequence and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., in combination with “either of” or “only one of”).

Claims

1. A wireless communication method performed by a first user equipment (UE), comprising: Send the first physical side link shared channel (PSSCH) transmission to the second UE; For the second Physical Side Link Shared Channel (PSSCH) transmission, select its corresponding Physical Side Link Feedback Channel (PSFCH) resource that does not conflict with one of the multiple PSFCH transmissions associated with the first PSSCH transmission based on a repetition factor; and The second PSSCH transmission is sent to the second UE via the PSSCH resource.

2. The method of claim 1, further comprising: The plurality of PSFCH transmissions are received from the second UE based at least in part on the first PSSCH transmission according to the repetition factor.

3. The method of claim 1, further comprising: The second PSSCH transmission is sent to the second UE at least in part based on receiving the plurality of PSFCH transmissions from the second UE according to the repetition factor.

4. The method of claim 1, wherein the second PSSCH transmission is performed after receiving the plurality of PSFCH transmissions from the second UE based at least in part on the first PSSCH transmission.

5. The method of claim 1, wherein the first PSSCH transmission and the second PSSCH transmission are associated with a single resource pool.

6. The method of claim 1, wherein the first PSSCH transmission is associated with a first resource pool, and further comprises: The second PSSCH transmission associated with the second resource pool is sent to the second UE at least in part based on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on the repetition factor are received from the second UE.

7. The method of claim 1, wherein a plurality of PSSCH resources are mapped to the PSFCH slot at least in part based on periodicity associated with the PSFCH slot.

8. The method of claim 1, wherein the plurality of PSFCH transmissions based on the repetition factor are associated with a HARQ-ACK feedback comprising one or more Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) bits.

9. The method of claim 1, wherein the PSFCH corresponding to the second PSSCH transmission is transmitted by the second UE in the same time slot on a resource block that is different from the repetition of the PSFCH used for the first PSSCH transmission.

10. The method of claim 1, wherein the priority associated with the second PSSCH transmission is not higher than the priority associated with the first PSSCH transmission.

11. A wireless communication method performed by a first user equipment (UE), comprising: Receives the first physical side link shared channel (PSSCH) transmission from the second UE; as well as The second PSSCH transmission is received from the second UE at least in part based on the first PSSCH transmission via its corresponding Physical Side Link Feedback Channel (PSFCH) resource, which does not conflict with one of a plurality of PSSCH transmissions according to the repetition factor.

12. The method of claim 11, further comprising: The plurality of PSFCH transmissions are transmitted to the second UE based at least in part on the first PSSCH transmission according to the repetition factor.

13. The method of claim 11, further comprising: The second PSSCH transmission is received from the second UE at least in part based on transmitting the plurality of PSFCH transmissions to the second UE according to the repetition factor.

14. The method of claim 11, wherein the second PSSCH transmission is received after the plurality of PSFCH transmissions are transmitted to the second UE at least in part based on the first PSSCH transmission.

15. The method of claim 11, wherein the first PSSCH transmission and the second PSSCH transmission are associated with a single resource pool.

16. The method of claim 11, wherein the first PSSCH transmission is associated with a first resource pool, and further comprises: The second PSSCH transmission associated with the second resource pool is received from the second UE at least in part based on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on the repetition factor are transmitted to the second UE.

17. The method of claim 11, wherein a plurality of PSSCH resources are mapped to the PSFCH slot at least in part based on periodicity associated with the PSFCH slot.

18. The method of claim 11, wherein the plurality of PSFCH transmissions based on the repetition factor are associated with a HARQ-ACK feedback comprising one or more Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) bits.

19. The method of claim 11, wherein the PSFCH corresponding to the second PSSCH transmission is transmitted to the second UE in the same time slot on a resource block that is different from the repetition of the PSFCH used for the first PSSCH transmission.

20. The method of claim 11, wherein the priority associated with the second PSSCH transmission is not higher than the priority associated with the first PSSCH transmission.

21. A first user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: Send the first physical side link shared channel (PSSCH) transmission to the second UE; For the second PSSCH transmission, select a PSSCH resource whose corresponding Physical Side Link Feedback Channel (PSFCH) resource does not conflict with one of a plurality of PSSCH transmissions associated with the first PSSCH transmission based on a repetition factor; and The second PSSCH transmission is sent to the second UE via the PSSCH resource.

22. The first UE of claim 21, wherein the memory and the one or more processors are further configured to: The plurality of PSFCH transmissions are received from the second UE based at least in part on the first PSSCH transmission according to the repetition factor.

23. The first UE of claim 21, wherein the memory and the one or more processors are further configured to: The second PSSCH transmission is sent to the second UE at least in part based on receiving the plurality of PSFCH transmissions from the second UE according to the repetition factor.

24. The first UE of claim 21, wherein the second PSSCH transmission is performed after receiving the plurality of PSFCH transmissions from the second UE based at least in part on the first PSSCH transmission.

25. The first UE of claim 21, wherein the first PSSCH transmission is associated with a first resource pool, and wherein the memory and the one or more processors are further configured to: The second PSSCH transmission associated with the second resource pool is sent to the second UE at least in part based on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on the repetition factor are received from the second UE.

26. A first user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: Receives first physical side link shared channel (PSSCH) transmission from the second UE; and The second PSSCH transmission is received from the second UE at least in part based on the first PSSCH transmission via its corresponding Physical Side Link Feedback Channel (PSFCH) resource, which does not conflict with one of a plurality of PSSCH transmissions according to the repetition factor.

27. The first UE of claim 26, wherein the memory and the one or more processors are further configured to: The plurality of PSFCH transmissions are transmitted to the second UE based at least in part on the first PSSCH transmission according to the repetition factor.

28. The first UE of claim 26, wherein the memory and the one or more processors are further configured to: The second PSSCH transmission is received from the second UE at least in part based on transmitting the plurality of PSFCH transmissions to the second UE according to the repetition factor.

29. The first UE of claim 26, wherein the second PSSCH transmission is received after the plurality of PSFCH transmissions have been transmitted to the second UE at least in part based on the first PSSCH transmission.

30. The first UE of claim 26, wherein the first PSSCH transmission is associated with a first resource pool, and wherein the memory and the one or more processors are further configured to: The second PSSCH transmission associated with the second resource pool is received from the second UE at least in part based on the first PSSCH transmission, regardless of whether multiple PSFCH transmissions based on the repetition factor are transmitted to the second UE.

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