Resource determination for sidelink hybrid automatic repeat request feedback

Abstract

In summary, various aspects of this disclosure relate to wireless communication. In some aspects, a user equipment (UE) can receive multiple physical side-link shared channel (PSSCH) communications on multiple side-link component carriers. The UE can use a resource set on a single component carrier among the multiple side-link component carriers and, at least in part, based on the determination of the resource set, send multiple hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback indications corresponding to the multiple PSSCH communications, wherein the determination of the resource set is at least in part based on the physical side-link feedback channel (PSFCH) format. Numerous other aspects may be provided.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to U.S. non-provisional patent application No. 17 / 125,856, filed on December 17, 2020, entitled “RESOURCE DETERMINATION FOR SIDELINK HYBRID AUTOMATIC REPEAT REQUEST FEEDBACK”, which is expressly incorporated herein by reference. Technical Field

[0003] In summary, various aspects of this disclosure relate to wireless communications, and various aspects of this disclosure relate to techniques and apparatus for resource determination in side-link hybrid automatic repeat request feedback. Background Technology

[0004] 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 enable communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / Improved LTE is an enhanced set of the Universal Mobile Telecommunications System (UMTS) mobile standard released by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include multiple base stations (BSs) capable of supporting communication for multiple user equipments (UEs). UEs can communicate with base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, and 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 Node B, gNB, Access Point (AP), Radio Headend, Transmit / Receive Point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global levels. New Radio (NR) (also known as 5G) is an enhancement set of the LTE mobile standard released by the 3rd Generation Partnership Project (3GPP). NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Spread Spectrum OFDM (DFT-s-OFDM)) on the uplink (UL), thereby better supporting mobile broadband internet access, as well as beamforming, multiple-input multiple-output (MIMO) antenna technologies, and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0007] In some aspects, a user equipment (UE) for wireless communication includes: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to: receive multiple physical side-link shared channel (PSSCH) communications on multiple side-link component carriers; and transmit multiple hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback indications corresponding to the multiple PSSCH communications using a resource set on a single component carrier among the multiple side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a physical side-link feedback channel (PSFCH) format.

[0008] In some aspects, a UE for wireless communication includes: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to: transmit a plurality of PSSCH communications on a plurality of side-link component carriers; and receive a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a PSFCH format.

[0009] In some aspects, a method of wireless communication performed by a UE includes: receiving a plurality of PSSCH communications on a plurality of side-link component carriers; and transmitting a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a PSFCH format.

[0010] In some aspects, a method of wireless communication performed by a UE includes: transmitting a plurality of PSSCH communications on a plurality of side-link component carriers; and receiving a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a PSFCH format.

[0011] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive a plurality of PSSCH communications on a plurality of side-link component carriers; and transmit a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a PSFCH format.

[0012] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: transmit a plurality of PSSCH communications on a plurality of side-link component carriers; and receive a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a PSFCH format.

[0013] In some aspects, an apparatus for wireless communication includes: a unit for receiving a plurality of PSSCH communications on a plurality of side-link component carriers; and a unit for transmitting a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a PSFCH format.

[0014] In some aspects, an apparatus for wireless communication includes: a unit for transmitting a plurality of PSSCH communications on a plurality of side-link component carriers; and a unit for receiving a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a PSFCH format.

[0015] In general, the aspects include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems as fully described herein with reference to the accompanying drawings and description and as shown by the accompanying drawings and description.

[0016] The foregoing has provided a fairly broad overview of the features and technical advantages of examples according to this disclosure in order to better understand the following detailed description. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein (both their organization and manner of operation) and their associated advantages will be better understood when considered in conjunction with the accompanying drawings, based on the following description. Each drawing in the accompanying drawings is provided for illustrative and descriptive purposes and is not intended to define a limitation of the claims. Attached Figure Description

[0017] To gain a full understanding of the foregoing features of this disclosure, a more specific description of the invention, briefly summarized above, can be obtained by referring to various aspects, 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 are therefore not intended to limit the scope of the disclosure, as other equally valid aspects are permissible under this description. The same reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1This is a diagram illustrating examples of wireless networks according to various aspects of this disclosure.

[0019] Figure 2 This is a diagram illustrating an example of communication between a base station and a UE in a wireless network according to various aspects of this disclosure.

[0020] Figure 3 This is a diagram illustrating an example of sidelink communication according to various aspects of this disclosure.

[0021] Figure 4 This is a diagram illustrating examples of sidelink communication and access link communication according to various aspects of this disclosure.

[0022] Figure 5 This is a diagram illustrating an example of determining sidelink feedback channel resources according to various aspects of this disclosure.

[0023] Figure 6 This is a diagram illustrating an example of side-link feedback for multiple side-link component carriers according to various aspects of this disclosure.

[0024] Figure 7 This is a diagram illustrating an example of signaling associated with resource determination for sidelink Hybrid Automatic Repeat Request (HARQ) feedback, according to various aspects of this disclosure.

[0025] Figure 8 and 9 This is a diagram illustrating an example process associated with determining resources for HARQ feedback, based on various aspects of this disclosure.

[0026] Figure 10 This is a block diagram of an example device for wireless communication according to various aspects of this disclosure. Detailed Implementation

[0027] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented 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 understand 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, an apparatus or a method may be implemented using any number of the aspects set forth herein. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods implemented using structures, functions, or structures and functions other than or different from the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0028] 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 detail below and illustrated in the accompanying drawings, through various frames, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether such an element is implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0029] It should be noted that while this document may use terms commonly associated with 5G or NR radio access technology (RAT) to describe aspects, aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0030] Figure 1This is a diagram illustrating an example of a wireless network 100 according to various aspects of this disclosure. Wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, as well as other examples. Wireless network 100 may include multiple base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, Transmit / Receive Point (TRP), etc. Each BS can 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.

[0031] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed User Group (CSG)). A BS used for macrocells can be referred to as a macro BS. A BS used for picocells can be referred to as a pico BS. A BS used for femtocells can be referred to as a femtocell BS or a home BS. Figure 1 In the examples shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” are used interchangeably herein.

[0032] 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 be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network via various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0033] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and transmit the data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying transmissions for other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, repeater, etc.

[0034] 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 can have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs can have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0035] Network controller 130 can be coupled to a group of base stations (BSs) and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. BSs can also communicate with each other directly or indirectly via wireless or wired backhaul.

[0036] 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, user 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 device, camera, gaming device, netbook, smartbook, ultrabook, medical device or apparatus, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music or video device, or satellite radio unit, etc.), 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.

[0037] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or to a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links, for example. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing housing the components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and memory components can be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0038] Typically, 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, 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.

[0039] 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 communication with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.) and / or mesh networks. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described herein as being performed by base station 110.

[0040] 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) (spanning from 410 MHz to 7.125 GHz), and / or can communicate using an operating band with a second frequency range (FR2) (spanning from 24.25 GHz to 52.6 GHz). The frequencies between FR1 and FR2 are sometimes referred to as intermediate frequencies (IFs). Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the "below 6 GHz" band. Similarly, FR2 is generally referred to as the "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) designated as the "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise explicitly stated, it should be understood that the terms "below 6 GHz" and the like (if used herein) can broadly refer to frequencies below 6 GHz, frequencies within FR1, and / or intermediate frequencies (e.g., above 7.125 GHz). Similarly, unless otherwise explicitly stated, it should be understood that the terms "millimeter wave" and the like (if used herein) can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequencies (e.g., below 24.25 GHz). It is anticipated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0041] As pointed out above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 The example described.

[0042] Figure 2 This is a diagram illustrating an example of communication between a base station 110 and a UE 120 in a wireless network 100 according to various aspects of 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.

[0043] At base station 110, transmitting processor 220 can receive data 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., code 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. Transmitting processor 220 can also process system information (e.g., semi-static resource allocation information (SRPI)) and control information (e.g., CQI requests, permission, and / or upper-layer signaling), and provide overhead symbols and control symbols. Transmitting 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, if applicable) on data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can (e.g., for OFDM) process its corresponding output symbol stream 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.

[0044] 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 adjust (e.g., filter, amplify, down-convert, 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 a received symbol. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receive processor 258 can process (e.g., demodulate and decode) the 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 the Reference Signal Received Power (RSRP) parameter, the Received Signal Strength Indicator (RSSI) parameter, the Reference Signal Received Quality (RSRQ) parameter, and / or the Channel Quality Indicator (CQI) parameter, as well as other examples. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0045] 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.

[0046] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included within the following: one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, and other examples. 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 antenna elements coupled to one or more transmitting and / or receiving components (such as...) Figure 2 One or more antenna elements (one or more components).

[0047] On the uplink, at UE 120, the transmitting processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting RSRP, RSSI, RSRQ, and / or CQI). The transmitting processor 264 can also generate reference symbols for one or more reference signals. Symbols from the transmitting processor 264 can be pre-coded (if applicable) by TX MIMO processor 266, 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, the modulator and demodulator (e.g., MOD / DEMOD 254) of UE 120 can be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264 and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (e.g., as referenced). Figure 6-9 (Described).

[0048] 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 (if applicable), and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide decoded data to data sink 239 and 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 communication. In some aspects, modulators and demodulators (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 antenna 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (e.g., as referenced). Figure 6-9 (Described).

[0049] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2 Any other components may perform one or more techniques associated with resource determination for sidelink Hybrid Automatic Repeat Request (HARQ) feedback, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component can perform or direct, for example Figure 8 The process 800 Figure 9 The operation of process 900 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, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, translation, and / or interpretation), may cause one or more processors, UE 120, and / or base station 110 to perform or instruct, for example... Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. In some aspects, execution instructions may include run instructions, translation instructions, compilation instructions and / or interpretation instructions, and other examples.

[0050] In some aspects, the UE may include: a unit for receiving multiple PSSCH communications on multiple side-link component carriers; and / or a unit for transmitting multiple HARQ-ACK feedback indications corresponding to the multiple PSSCH communications using a resource set on a single component carrier among the multiple side-link component carriers and based at least in part on the determination of the resource set, wherein the determination of the resource set is based at least in part on the PSFCH format. The unit for the UE to perform the operations described herein may include, for example, one or more of antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, or memory 282.

[0051] In some aspects, the UE includes: a unit for receiving an explicit indication for indicating a resource set; and / or a unit for determining a resource set at least in part based on the explicit indication. In some aspects, the UE includes: a unit for receiving an explicit indication from a base station. In some aspects, the UE includes: a unit for receiving an explicit indication from an additional UE, wherein receiving multiple PSSCH communications includes: receiving multiple PSCH communications from the additional UE.

[0052] In some aspects, the UE includes: a unit for determining an implicit indication for indicating a resource set; and / or a unit for determining a resource set at least partially based on the implicit indication. In some aspects, the UE includes: a unit for determining the implicit indication at least partially based on: determining previous transmissions at least partially based on multiple monitoring opportunities associated with time slots spanning multiple component carriers. In some aspects, the UE includes: a unit for determining the implicit indication at least partially based on: determining previous transmissions at least partially based on time periods associated with multiple time slots. In some aspects, the UE includes: a unit for determining a subset of a resource pool at least partially based on the implicit indication; and / or a unit for determining a resource set at least partially based on a PSFCH resource indication. In some aspects, the UE includes: a unit for receiving the implicit indication from a base station. In some aspects, the UE includes: a unit for receiving the implicit indication from a base station via a relay device. In some aspects, the UE includes: a unit for determining the implicit indication at least partially based on negotiation with an additional UE. In some aspects, the UE includes: a unit for determining the PSSCH-HARQ gap based at least partially on explicit indications. In some aspects, the UE includes: a unit for determining the PSSCH-HARQ gap based at least partially on implicit indications. In some aspects, the UE includes: a unit for transmitting a first set of HARQ-ACK feedback indications from a plurality of HARQ-ACK feedback indications; and / or a unit for discarding a second set of HARQ-ACK feedback indications based at least partially on the format of the set of HARQ-ACK feedback indications or the payload of the set of HARQ-ACK feedback indications.

[0053] In some aspects, the UE may include: a unit for transmitting multiple PSSCH communications on multiple side-link component carriers; and / or a unit for receiving multiple HARQ-ACK feedback indications corresponding to the multiple PSSCH communications using a resource set on a single component carrier among the multiple side-link component carriers and based at least in part on the determination of the resource set, wherein the determination of the resource set is based at least in part on the PSFCH format. The unit for the UE to perform the operations described herein may include, for example, one or more of antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, or memory 282.

[0054] In some aspects, the UE includes: a unit for transmitting an explicit indication for indicating a resource set, wherein the determination of the resource set is at least partially based on the explicit indication. In some aspects, the UE includes: a unit for receiving an explicit indication from a base station.

[0055] Although Figure 2 The boxes in the diagram are shown as different components, but the functions described above with respect to these boxes can be implemented in a single hardware, software, or combined component, or in various combinations 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 or under the control of controller / processor 280.

[0056] As pointed out above, Figure 2 This is provided as an example. Other examples may differ from the one provided. Figure 2 The example described.

[0057] Figure 3 This is a diagram illustrating example 300 of sidelink communication according to various aspects of this disclosure.

[0058] 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. UEs 305-1 and 305-2 can communicate using one or more sidelink channels 310. In some aspects, UEs 305 (e.g., UEs 305-1 and / or UEs 305-2) can correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, the one or more sidelink channels 310 can use a PC5 interface and / or can operate in a high-frequency band (e.g., the 5.9 GHz band). Alternatively or additionally, UEs 305 can use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, symbols, etc.).

[0059] like Figure 3 As further shown, one or more sidelink channels 310 may include a Physical Sidelink Control Channel (PSCCH) 315, a Physical Sidelink Shared Channel (PSSCH) 320, and / or a Physical Sidelink Feedback Channel (PSFCH) 325. Similar to the Physical Downlink Control Channel (PDCCH) and / or Physical Uplink Control Channel (PUCCH) used for cellular communication with base station 110 via an access link or access channel, PSCCH 315 may be used to transmit control information. Similar to the Physical Downlink Shared Channel (PDSCH) and / or Physical Uplink Shared Channel (PUSCH) used for cellular communication with base station 110 via an access link or access channel, PSSCH 320 may be used to transmit data. For example, PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, spatial resources, etc.), wherein a transport block (TB) 335 may be carried on PSSCH 320. TB 335 may include data. PSFCH 325 may be used to transmit side-link feedback 340, such as Hybrid Automatic Repeat Request (HARQ) feedback (e.g., ACK / NACK information), Transmit Power Control (TPC), Schedule Request (SR), etc.

[0060] In some aspects, one or more sidelink channels 310 may use resource pooling. For example, scheduling assignments may be transmitted across time using specific resource blocks (RBs) in a subchannel (e.g., included in SCI 330). In some aspects, data transmissions associated with a scheduling assignment (e.g., on PSSCH 320) may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, scheduling assignments and associated data transmissions are not transmitted on adjacent RBs.

[0061] In some aspects, UE 305 may operate using a transmission mode in which resource selection and / or scheduling is performed by UE 305 (e.g., instead of base station 110). In some aspects, UE 305 may perform resource selection and / or scheduling by sensing the availability of the transmission channels. 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, and so on, and may select the channel for transmission for sidelink communication based at least in part on the measurements.

[0062] Alternatively, UE 305 may use SCI 330 received in PSCCH 315 to perform resource selection and / or scheduling, whereby SCI 320 may indicate occupied resources, channel parameters, etc. Alternatively, 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 that UE 305 can use for a particular set of subframes).

[0063] In a transport mode where resource selection and / or scheduling is performed by UE 305, UE 305 can generate sidelink grants and can send the grants in SCI 330. Sidelink grants can indicate one or more parameters (e.g., transport parameters) for an upcoming sidelink transport, such as one or more resource blocks (e.g., for TB 335) to be used for the upcoming sidelink transport on PSSCH 320, one or more subframes to be used for the upcoming sidelink transport, modulation and coding scheme (MCS) to be used for the upcoming sidelink transport, etc. In some aspects, UE 305 can generate sidelink grants that indicate one or more parameters for semi-persistent scheduling (SPS), such as the period of the sidelink transport. Alternatively or concurrently, UE 305 can generate sidelink grants for event-driven scheduling (e.g., for on-demand sidelink messages).

[0064] As pointed out above, Figure 3 This is provided as an example. Other examples may differ from the one provided. Figure 3 The example described.

[0065] Figure 4 This is a diagram illustrating example 400 of sidelink communication and access link communication according to various aspects of this disclosure.

[0066] like Figure 4 As shown, the transmitter (Tx) / receiver (Rx) UE 405 and the Rx / Tx UE 410 can communicate with each other via a side link, as described above. Figure 3 As described. Further, in some sidelink modes, base station 110 may communicate with Tx / Rx UE 405 via a first access link. 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 UE 120 (e.g., via the PC5 interface) can be referred to as a sidelink, 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. Sidelink communication can be transmitted via the sidelink, and access link communication can be transmitted via the access link. Access link communication can be downlink communication (from base station 110 to UE 120) or uplink communication (from UE 120 to base station 110).

[0067] As pointed out above, Figure 4This is provided as an example. Other examples may differ from the one provided. Figure 4 The example described.

[0068] Figure 5 This is a diagram illustrating example 500 of the determination of sidelink feedback channel resources according to various aspects of this disclosure. Figure 5 Resource pool 505 is shown. Resource pool 505 includes 10 sub-channels (N subch =10), showing four sub-channels. A sub-channel is a frequency-domain subset of the resource pool. A resource pool can be configured with one or more sub-channels. A resource pool can be configured with a PSFCH period, which indicates the period of PSFCH transmissions associated with the resource pool. In Example 500, resource pool 505 is configured with a PSFCH period of 4. PSFCH resource 510, indicated by the PSFCH cycle, is in the fourth time slot of resource pool 505.

[0069] The UE can allocate a configured number of Physical Resource Blocks (PRBs) for PSFCH resource 510. In Example 500, the UE can allocate 80 PRBs for PSFCH resource 510. A PRB is a group of subcarriers and can include up to 12 subcarriers. This is because each PSFCH resource (due to...) ) and 10 sub-channels in the resource pool (due to N subch There are 4 time slots between them, so each subchannel is associated with 2 PSFCH PRBs out of 80 PSFCH PRBs (e.g., 80 PRBs / (4 time slots * 10 subchannels) = 2 PRBs). In this case, side link feedback for subchannels and time slots can be transmitted on 1 of the 2 corresponding PSFCH PRBs. Refer to time slot i and subchannel j, as follows Figure 5 As shown, the UE can receive from A PRB One PRB is allocated to time slot i and sub-channel j, where And 0≤j≤N subch .

[0070] As described above, PSFCH resource 510 can be used to send HARQ feedback regarding PSSCH received in resource pool 505. Sidelink HARQs can be sequence-based and can carry a single bit for each PSSCH. Sidelink HARQs can be sent on two consecutive symbols (e.g., symbols 11 and 12 of the time slot). In some cases, a symbol before and a symbol after the PSFCH timing can be assigned to the slot. A period parameter (e.g., periodPSFCHresource) can indicate the PSFCH period of the resource pool (in order of the number of time slots). For example, the PSFCH period can be set to a value in the set {0, 1, 2, 4}. If the PSFCH period is set to 0, PSFCH transmissions from the UE are disabled in the resource pool. In example 500, the PSFCH period is set to 4, so PSFCH transmissions are performed in every fourth time slot. The UE can transmit PSFCH in a first timeslot, which includes PSFCH resources and is at least a number of timeslots provided by parameters (e.g., MinTimeGapPSFCH) of the resource pool after the last timeslot of PSSCH reception. The parameters (e.g., rbSetPSFCH) can indicate the resource pool used for PSFCH transmission. The set and / or number of PRBs. Parameters (e.g., numSubchannel) can indicate the N used for the resource pool. subch The number of sub-channels. The number of PSSCH slots associated with a PSFCH slot can be indicated, and this number can be determined at least in part based on the aforementioned periodPSFCHresource parameter. In some aspects, and

[0071] As pointed out above, Figure 5 This is provided as an example. Other examples may differ from the one provided. Figure 5 The example described.

[0072] Sidelink deployments can support carrier aggregation (CA). In CA, multiple frequency blocks (referred to as component carriers (CCs) or cells) are assigned to a single user. Compared to a single-carrier configuration, sidelink CA can improve sidelink throughput. For example, in sidelink CA, a first UE and a second UE can use multiple CCs to communicate with each other. In some examples, multiple resource pools can be used to implement sidelink CA. For example, each CC in a sidelink CA configuration can include one or more bandwidth portions (BWPs), and each BWP can include one or more resource pools. In this way, each CC in a sidelink CA configuration can be associated with one or more corresponding resource pools. The techniques and apparatus described herein are not limited to those relating to corresponding resource pools for each CC, but can be applied to situations where multiple CCs are configured on a single resource pool, multiple sub-BWPs are configured on a single resource pool, multiple resource pools are configured on a single CC, and / or multiple resource pools are configured on a single BWP, as well as other examples.

[0073] HARQ feedback provides a mechanism for informing a transmitter whether a communication has been successfully received. For example, the transmitter can send scheduling information for the communication. The receiver, receiving the scheduling information, can monitor the resources indicated by the scheduling information to receive the communication. If the receiver successfully receives the communication, it can send an acknowledgment (ACK) in the HARQ feedback. If the receiver fails to receive the communication, it can send a negative ACK (NACK) in the HARQ feedback. Therefore, based at least in part on HARQ feedback, the transmitter can determine whether the communication should be retransmitted. HARQ feedback is typically implemented using a single bit, where the first value of the bit indicates ACK and the second value indicates NACK. Such a bit can be called a HARQ-ACK bit. HARQ-ACK feedback can be transmitted in a HARQ codebook, which may include one or more bits indicating ACK or NACK corresponding to one or more communications.

[0074] For sidelink CAs, HARQ feedback can relate to communications on multiple sidelink CCs. For example, a first UE may send HARQ feedback to a second UE regarding multiple PSSCHs on different CCs. As another example, a first UE may send HARQ feedback to multiple different UEs regarding PSSCHs received from multiple different UEs on different CCs. However, if the intended set of resources for the transmission used for HARQ feedback is not aligned between the first UE and the second UE (or multiple different UEs), the HARQ feedback cannot be reliably interpreted by the receiver of the HARQ feedback. Failure to properly interpret HARQ feedback can lead to reduced throughput, unnecessary retransmissions, and increased use of computational and communication resources.

[0075] Some of the techniques and apparatus described herein provide HARQ feedback for a sidelink UE using a sidelink CA configuration. For example, some of the techniques and apparatus described herein provide resources for determining sidelink HARQ feedback associated with PSSCH communications received using several component carriers. HARQ feedback can be reported on a single component carrier. In some aspects, HARQ feedback may include multiple bits for each received PSSCH communication. In some cases, resources can be explicitly indicated if the number of resources in each resource set meets a threshold. If the number of resources fails to meet the threshold, implicit indication of resources or sets thereof can be used. In this way, ambiguity regarding the resources on which HARQ is reported is eliminated, making it possible to reliably use HARQ feedback for sidelink CA configuration.

[0076] Figure 6 This is a diagram illustrating example 600 of side-link feedback for multiple side-link component carriers according to various aspects of this disclosure. Example 600 shows a first CC (CC0) and a second CC (CC1), which are side-link CCs between a first UE (e.g., a receiver UE) and a second UE (e.g., a transmitter UE). Figure 6 The receiver UE and transmitter UE are not shown in the diagram.

[0077] As shown in the figure, a first UE can receive multiple PSSCHs from a second UE. For example, the first UE can receive one or more PSSCHs on a first CC and one or more PSSCHs on a second CC. As indicated by the arrows from the PSSCHs, the UE can provide HARQ feedback on multiple PSSCHs on PSFCHs transmitted via a specified set of CCs. In Example 600, the specified set of CCs includes only CC0, but other examples may include different CCs (e.g., CC1) or multiple CCs (e.g., CC0 and CC1). HARQ feedback can be reported using resources that have been configured to report HARQ on a single component carrier using one or more bits.

[0078] As pointed out above, Figure 6 This is provided as an example. Other examples may differ from the one provided. Figure 6 The example described.

[0079] Figure 7 This is a diagram illustrating example 700 of signaling associated with HARQ feedback resource configuration for a side link with carrier aggregation, according to various aspects of this disclosure. Figure 7 As shown, the first UE 705 and the second UE 710 can communicate with each other.

[0080] As shown by reference numeral 715, the first UE 705 may send an indication of a HARQ feedback resource set to the second UE 710. The HARQ feedback resource set may include a resource set on a single component carrier among multiple sidelink component carriers, which can be used to send one or more HARQ acknowledgment (HARQ-ACK) feedback indications. This resource set may include a PSFCH resource set. In some aspects, the first UE 705 may determine this resource set. In some aspects, the second UE 710 may determine this resource set. As shown by reference numeral 720, in some aspects, the second UE 710 may send and the first UE 705 may receive an indication of a HARQ feedback resource set. In some examples, this indication may be provided by another entity (e.g., a base station).

[0081] In some aspects, UE 705 and / or UE 710 may determine the resource set based at least in part on explicit and / or implicit indications. In some aspects, resources may be explicitly indicated if the number of resources in the resource set meets a resource threshold. The threshold may be associated with the number of bits available in the sidelink control information (SCI) message used to explicitly indicate the resources. Thus, for example, in some aspects, an SCI message may be used if the number of resources is less than or equal to the maximum number of resources that can be indicated using an SCI message (e.g., an SCI-2 message). Otherwise, implicit indications may be used instead of explicit indications or in addition to explicit indications. In some aspects, the resource pool may be divided into different sets at least in part based on the maximum payload size.

[0082] For example, an SCI message can be used if the number of resources in the set is less than or equal to X (where log2(X) bits are available in the SCI (e.g., SCI2) message). This indication can be received directly or indirectly from the base station. For example, the base station can send this indication to the second UE 710, and the second UE 710 can include this indication in its transmission to the first UE 705. In some aspects, the second UE 710 can select the resource set.

[0083] In some aspects, an implicit indication may be used if the number of resources in each set fails to meet a resource threshold (e.g., the number of resources in the set > X). The implicit indication may be a function of the set of subchannels used for previous transmissions (e.g., the index of the starting subchannel or the index of the starting resource block). Previous transmissions may be PSCCH transmissions and / or PSSCH transmissions. Previous transmissions may include the most recent transmission (e.g., the PSCCH associated with the most recent PSSCH). In some aspects, UE 705 and / or 710 may determine previous transmissions at least in part based on multiple monitoring opportunities associated with time slots spanning multiple component carriers. UE 705 and / or 710 may determine the implicit indication at least in part based on: determining previous transmissions at least in part based on time periods associated with multiple time slots.

[0084] In some aspects, implicit indications may include at least one of the following: source identifier (ID), destination ID, timeslot ID, sidelink area ID, resource pool ID, sidelink component carrier ID, and / or bandwidth portion ID, and other examples. UE 705 and / or 710 may determine a subset of the resource pool based at least in part on implicit indications and at least in part on PSFCH resource indications. In some aspects, UE 705 and / or 710 may determine a subset of the resource pool based at least in part on the determination of the resource pool. The determination of a subset of the resource pool may be based at least in part on the determination of a single carrier and / or the broadcast type associated with sending multiple HARQ-ACK feedback indications, and other examples.

[0085] For example, if the resource set has more than X resources, X' resources can be selected based on one or more of the factors mentioned above. The sidelink PSFCH resource indication (S-PRI) can be used to indicate the set of X' resources to be selected. The selection of the subset can be indicated directly or indirectly by the base station, can be negotiated between the sidelink UEs 705 and 710, and / or can be defined on a per-resource-pool and / or-carrier basis. In some aspects, the selection formula can depend on the broadcast type (e.g., unicast, connectionless multicast, or managed multicast).

[0086] In some aspects, UE 705 and / or 710 may determine the PSSCH-HARQ gap K1 at least in part based on explicit indications. UE 705 and / or 710 may also determine the PSSCH-HARQ gap at least in part based on implicit indications. For example, K1 may be signaled by a second UE 710 as part of the PSSCH resource determination. The second UE 710 may have already received this indication directly or indirectly from the base station. In some aspects, the set of K1 values ​​may be configured for resource pools and / or carriers, and may also depend on broadcast type, area ID, and / or channel busy ratio (CBR). In some aspects, this may be useful, for example, where the repeater supports multiple remote UEs and has the ability to manage HARQ feedback from different UEs.

[0087] In some aspects, the UE may not be able to simultaneously send all corresponding feedback indications in response to PSSCH communications received by the UE. In such cases, the format and payload of the PSFCH transmission can be considered to help determine which indications should be discarded. This can be in addition to considering the packet priority associated with the HARQ-ACK bits. In some aspects, the UE 705 may send a first set of multiple HARQ-ACK feedback indications based at least in part on the format of the HARQ-ACK feedback indication set or the payload of the HARQ-ACK feedback indication, and discard a second set of HARQ-ACK feedback indications. In this way, by discarding PSSCHs carrying larger payloads, more retransmissions may be triggered, which may cause resource pool congestion.

[0088] As shown by reference numeral 725 in the accompanying drawings, the second UE 710 can transmit multiple PSSCH communications on multiple sidelink component carriers of a sidelink network with carrier aggregation, and the first UE 705 can receive multiple PSSCH communications on multiple sidelink component carriers of a sidelink network with carrier aggregation. As shown by reference numeral 730 in the accompanying drawings, the first UE 705 can transmit, and the second UE 710 can receive, multiple HARQ-ACK feedback indications corresponding to the multiple PSSCH communications. In some aspects, the first UE 705 can use a set of HARQ feedback resources to transmit HARQ-ACK feedback indications.

[0089] As pointed out above, Figure 7 This is provided as an example. Other examples may differ from the one provided. Figure 7 The example described.

[0090] Figure 8This is a diagram illustrating, for example, an example process 800 performed by a UE according to various aspects of this disclosure. Example process 800 is an example in which a UE (e.g., UE 705) performs operations associated with resource determination for sidelink HARQ feedback.

[0091] like Figure 8 As shown, in some aspects, process 800 may include: receiving multiple PSSCH communications on multiple side link component carriers (block 810). For example, the UE (e.g., using...) Figure 10 The receiving component 1002 described herein can receive multiple PSSCH communications on multiple side link component carriers, as described above.

[0092] like Figure 8 Further, in some aspects, process 800 may include: using a resource set on a single component carrier among a plurality of side-link component carriers and based at least in part on the determination of the resource set, to send a plurality of HARQ-ACK feedback indications corresponding to a plurality of PSSCH communications, wherein the determination of the resource set is based at least in part on the PSSCH format (box 820). For example, the UE (e.g., using...) Figure 10 The transmitting component 1004 described herein can use a resource set on a single component carrier among a plurality of side-link component carriers and at least in part based on the determination of the resource set to transmit a plurality of HARQ-ACK feedback indications corresponding to a plurality of PSSCH communications, wherein the determination of the resource set is at least in part based on the PSFCH format, as described above.

[0093] Process 800 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other process descriptions elsewhere described herein.

[0094] In the first aspect, process 800 includes: receiving an explicit indication for indicating a set of resources; and determining the set of resources based at least in part on the explicit indication.

[0095] In the second aspect, either alone or in combination with the first aspect, process 800 includes: receiving an explicit instruction from a base station.

[0096] In the third aspect, either alone or in combination with one or more of the first and second aspects, process 800 includes: receiving an explicit indication from an additional UE, wherein receiving multiple PSSCH communications includes: receiving multiple PSCH communications from the additional UE.

[0097] In the fourth aspect, receiving an explicit instruction, either alone or in combination with one or more of the first to third aspects, includes receiving an explicit instruction based at least in part on a determination of whether the number of resources in the resource set satisfies a resource threshold.

[0098] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 800 includes: determining an implicit indication for indicating a set of resources; and determining the set of resources based at least in part on the implicit indication.

[0099] In the sixth aspect, determining an implicit instruction, either alone or in combination with the fifth aspect, includes determining the implicit instruction based at least in part on the determination of the number of resources in the resource set that fails to meet the resource threshold.

[0100] In the seventh aspect, either alone or in combination with one or more aspects of the fifth or sixth aspect, an implicit indication is made of a function that includes a set of sub-channels used for previous transmissions.

[0101] In the eighth aspect, either alone or in combination with the seventh aspect, previous transmissions may include the most recent transmissions.

[0102] In the ninth aspect, either alone or in combination with the seventh aspect, an implicit indication is made of the index of the starting sub-channel in the set of sub-channels.

[0103] In the tenth aspect, either alone or in combination with one or more aspects from the seventh to the ninth aspect, an index of the starting resource block comprising the resource set is implicitly indicated.

[0104] In the eleventh aspect, either alone or in combination with one or more aspects from the seventh to the tenth aspects, process 800 includes: determining an implicit indication based at least in part on: determining previous transmissions based at least in part on multiple monitoring opportunities associated with time slots spanning multiple component carriers.

[0105] In the twelfth aspect, either alone or in combination with one or more aspects from the seventh to the eleventh aspects, process 800 includes: determining an implicit indication based at least in part on: determining previous transmissions based at least in part on time periods associated with multiple time slots.

[0106] In the thirteenth aspect, either alone or in combination with one or more of the fifth to twelfth aspects, the implicit indication includes at least one of the following: source identifier (ID), destination ID, time slot ID, sidelink area ID, resource pool ID, sidelink component carrier ID, or bandwidth portion ID.

[0107] In the fourteenth aspect, alone or in combination with the thirteenth aspect, process 800 includes: determining a subset of the resource pool based at least in part on implicit indications; and determining a set of resources based at least in part on PSFCH resource indications.

[0108] In the fifteenth aspect, determining a subset of the resource pool, either alone or in combination with the fourteenth aspect, includes determining a subset of the resource pool based at least in part on the determination of the resource pool.

[0109] In the sixteenth aspect, determining a subset of the resource pool, either alone or in combination with one or more aspects of the fourteenth or fifteenth aspect, includes determining a subset of the resource pool based at least in part on the determination of a single carrier.

[0110] In the seventeenth aspect, determining a subset of the resource pool, either alone or in combination with one or more aspects from the fourteenth to the sixteenth aspects, includes determining the subset of the resource pool based at least in part on the broadcast type associated with sending multiple HARQ-ACK feedback indications.

[0111] In the eighteenth aspect, alone or in combination with one or more aspects from the fourteenth to the seventeenth aspects, process 800 includes: receiving an implicit indication from a base station.

[0112] In the nineteenth aspect, alone or in combination with one or more aspects from the fifth to the eighteenth aspects, process 800 includes: receiving an implicit indication from a base station via a relay device.

[0113] In the twentieth aspect, either alone or in combination with one or more of the fifth to nineteenth aspects, process 800 includes: determining an implicit indication based at least in part on negotiation with the additional UE.

[0114] In the twenty-first aspect, either alone or in combination with one or more aspects from the first to the twentieth, process 800 includes: determining the PSSCH to HARQ gap based at least in part on explicit instructions.

[0115] In the twenty-second aspect, either alone or in combination with one or more aspects from the first to the twenty-first aspect, process 800 includes: determining the PSSCH to HARQ gap based at least in part on implicit indications.

[0116] In the twenty-third aspect, sending a plurality of HARQ-ACK feedback indications, either alone or in combination with one or more of the first to twenty-second aspects, includes: sending a first set of HARQ-ACK feedback indications among the plurality of HARQ-ACK feedback indications; and discarding a second set of HARQ-ACK feedback indications, at least in part based on at least one of the format of the set of HARQ-ACK feedback indications or the payload of the set of HARQ-ACK feedback indications.

[0117] Although Figure 8 An example box of process 800 is shown, but in some aspects, process 800 may include... Figure 8 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 800 may be executed in parallel.

[0118] Figure 9 This is a diagram illustrating, for example, an example process 900 performed by a UE according to various aspects of this disclosure. Example process 900 is an example in which a UE (e.g., UE 710) performs operations associated with resource determination for sidelink HARQ feedback.

[0119] like Figure 9 As shown, in some aspects, process 900 may include: transmitting multiple PSSCH communications on multiple side link component carriers (block 910). For example, the UE (e.g., using...) Figure 10 The transmitting component 1004 described herein can transmit multiple PSSCH communications on multiple side link component carriers, as described above.

[0120] like Figure 9 Further, in some aspects, process 900 may include: receiving multiple HARQ-ACK feedback indications corresponding to multiple PSSCH communications using a resource set on a single component carrier among multiple side-link component carriers and based at least in part on the determination of the resource set, wherein the determination of the resource set is based at least in part on the PSSCH format (box 920). For example, the UE (e.g., using...) Figure 10 The receiving component 1002 described herein can receive multiple HARQ-ACK feedback indications corresponding to multiple PSSCH communications using a resource set on a single component carrier among multiple side-link component carriers and based at least in part on the determination of the resource set, wherein the determination of the resource set is based at least in part on the PSFCH format as described above.

[0121] Process 900 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other process descriptions elsewhere described herein.

[0122] In the first aspect, process 900 includes: sending an explicit indication for indicating a set of resources, wherein the determination of the set of resources is based at least in part on the explicit indication.

[0123] In the second aspect, either alone or in combination with the first aspect, process 900 includes: receiving an explicit instruction from a base station.

[0124] In the third aspect, sending an explicit instruction, either alone or in combination with one or more of the first and second aspects, includes sending the explicit instruction based at least in part on a determination of whether the number of resources in the resource set satisfies a resource threshold.

[0125] In the fourth aspect, the determination of the resource set is based, at least in part, on the determination of the implicit indication, either alone or in combination with one or more of the first to third aspects.

[0126] In the fifth aspect, either alone or in combination with the fourth aspect, the determination of implicit indications is based at least in part on the determination of the number of resources in the resource set that fails to meet the resource threshold.

[0127] In the sixth aspect, either alone or in combination with one or more aspects of the fourth or fifth aspect, an implicit indication is made of a function that includes a set of sub-channels used for previous transmissions.

[0128] In the seventh aspect, previous transmissions may include the most recent transmissions.

[0129] In the eighth aspect, either alone or in combination with one or more aspects from the fourth to the sixth aspect, an implicit indication is made of the index of the starting subchannel in the set of subchannels.

[0130] In the ninth aspect, either alone or in combination with one or more aspects from the fourth to the eighth, an index of the starting resource block comprising the resource set is implicitly indicated.

[0131] In the tenth aspect, the determination of the implicit indication, either alone or in combination with one or more of the fourth to ninth aspects, is based at least in part on the determination of previous transmissions based at least in part on multiple monitoring opportunities associated with time slots spanning multiple component carriers.

[0132] In the eleventh aspect, either alone or in combination with one or more of the fourth to tenth aspects, the determination of the implicit indication is based at least in part on the determination of the previous transmission based at least in part on the time periods associated with multiple time slots.

[0133] In the twelfth aspect, either alone or in combination with one or more aspects from the fourth to the eleventh aspects, the implicit indication includes at least one of the following: source identifier (ID), destination ID, time slot ID, sidelink area ID, resource pool ID, sidelink component carrier ID, or bandwidth portion ID.

[0134] In aspect thirteen, either alone or in combination with aspect twelf, the determination of the resource set is based at least in part on the determination of a subset of the resource pool by implicit indication and the determination of PSFCH resource indication.

[0135] In aspect fourteen, either alone or in combination with aspect thirteen, the determination of a subset of the resource pool is at least partially based on the determination of the resource pool.

[0136] In the fifteenth aspect, either alone or in combination with one or more aspects of the thirteenth or fourteenth aspect, the determination of a subset of the resource pool is based at least in part on the determination of individual carriers.

[0137] In the sixteenth aspect, either alone or in combination with one or more of aspects thirteen through fifteen, the determination of a subset of the resource pool is based at least in part on the broadcast type associated with sending multiple HARQ-ACK feedback indications.

[0138] In the seventeenth aspect, either alone or in combination with one or more aspects from the thirteenth to the sixteenth aspect, the determination of the implicit indication is based at least in part on negotiation with the additional UE.

[0139] Although Figure 9 An example box of process 900 is shown, but in some aspects, process 900 may include... Figure 9 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 900 may be executed in parallel.

[0140] Figure 10This is a block diagram of an example device 1000 for wireless communication. Device 1000 may be a UE, or a UE may include device 1000. In some aspects, device 1000 includes a receiving component 1002 and a transmitting component 1004, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1000 can use the receiving component 1002 and the transmitting component 1004 to communicate with another device 1006 (such as a UE, a base station, or another wireless communication device). As further shown, device 1000 may include a HARQ component 1008 configured to generate, interpret, and / or otherwise manage HARQ-ACK feedback indications.

[0141] In some respects, device 1000 can be configured to perform the functions described herein. Figure 6-7 One or more operations described herein. Alternatively or concurrently, the apparatus 1000 may be configured to perform one or more processes described herein, such as... Figure 8 The process 800 Figure 9 The process 900 or a combination thereof. In some respects, Figure 10 The device 1000 and / or one or more components shown may include the above-described components. Figure 2 One or more components of the UE as described. Alternatively or in addition, Figure 10 One or more components shown can be combined with the above. Figure 2 The description refers to implementation within one or more components. 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 executable by a controller or processor to perform the function or operation of the component.

[0142] Receiver 1002 may receive communications from device 1006, such as reference signals, control information, data communications, or combinations thereof. Receiver 1002 may provide the received communications to one or more other components of device 1000. In some aspects, receiver 1002 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, and other examples), and may provide the processed signal to one or more other components of device 1006. In some aspects, receiver 1002 may include the elements described above. Figure 2 The described UE includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0143] Transmitting component 1004 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1006. In some aspects, one or more other components of device 1006 can generate communications and provide the generated communications to transmitting component 1004 for transmission to device 1006. In some aspects, transmitting component 1006 can perform signal processing (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, and other examples) on the generated communications and can transmit the processed signal to device 1006. In some aspects, transmitting component 1004 can include the combinations described above. Figure 2 The described UE includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, transmit component 1004 may be co-located with receive component 1002 in a transceiver. HARQ component 1008 may include the elements described above. Figure 2 The described UE includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof.

[0144] The receiving component 1002 can receive multiple PSSCH communications on multiple side-link component carriers. The transmitting component 1004 can use a resource set on a single component carrier among the multiple side-link component carriers and, at least in part, based on the determination of the resource set, to transmit multiple HARQ-ACK feedback indications corresponding to the multiple PSSCH communications, wherein the determination of the resource set is at least in part based on the PSFCH format.

[0145] The receiving component 1002 can receive an explicit indication for indicating a resource set. The HARQ component 1008 can determine the resource set at least in part based on the explicit indication. The receiving component 1002 can receive the explicit indication from the base station.

[0146] The receiving component 1002 can receive explicit indications from an additional UE, wherein receiving multiple PSSCH communications includes receiving multiple PSSCH communications from the additional UE. The HARQ component 1008 can determine implicit indications for indicating a resource set. The HARQ component 1008 can determine the resource set at least partially based on the implicit indications. The HARQ component 1008 can determine the implicit indications at least partially based on: determining previous transmissions at least partially based on: multiple monitoring opportunities associated with time slots spanning multiple component carriers. The HARQ component 1008 can determine the implicit indications at least partially based on: time periods associated with multiple time slots. The HARQ component 1008 can determine a subset of the resource pool at least partially based on the implicit indications. The HARQ component 1008 can determine the resource set at least partially based on PSFCH resource indications.

[0147] The receiving component 1002 can receive implicit indications from the base station. The receiving component 1002 can receive implicit indications from the base station via a relay device. The HARQ component 1008 can determine the implicit indications at least partially based on negotiation with an additional UE. The HARQ component 1008 can determine the PSSCH-HARQ gap at least partially based on explicit indications. The HARQ component 1008 can determine the PSSCH-HARQ gap at least partially based on implicit indications.

[0148] The transmitting component 1004 can transmit multiple PSSCH communications on multiple side-link component carriers. The receiving component 1002 can receive multiple HARQ-ACK feedback indications corresponding to the multiple PSSCH communications using a resource set on a single component carrier among the multiple side-link component carriers and based at least in part on the determination of the resource set, wherein the determination of the resource set is based at least in part on the PSFCH format.

[0149] The transmitting component 1004 can transmit an explicit indication for indicating a resource set, wherein the determination of the resource set is at least partially based on the explicit indication. The receiving component 1002 can receive the explicit indication from the base station.

[0150] Figure 10 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 10 The components shown are compared to additional components, fewer components, different components, or components arranged in a different way. Furthermore, Figure 10 The two or more components shown can be implemented within a single component, or Figure 10 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 10The set (one or more) components shown can perform actions described by Figure 10 The other set of components shown performs one or more functions.

[0151] The following provides a summary of various aspects of this disclosure:

[0152] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving a plurality of physical side-link shared channel (PSSCH) communications on a plurality of side-link component carriers; and transmitting a plurality of hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a physical side-link feedback channel (PSFCH) format.

[0153] Aspect 2: The method according to aspect 1 further includes: receiving an explicit indication for indicating the resource set; and determining the resource set at least in part based on the explicit indication.

[0154] Aspect 3: The method according to aspect 2 further includes: receiving the explicit instruction from the base station.

[0155] Aspect 4: The method according to any one of Aspect 2 or 3 further includes: receiving the explicit indication from an additional UE, wherein receiving the plurality of PSSCH communications includes: receiving the plurality of PSSCH communications from the additional UE.

[0156] Aspect 5: The method according to any one of Aspects 2-4, wherein receiving the explicit instruction comprises: receiving the explicit instruction based at least in part on a determination regarding the quantity of resources in the resource set satisfying a resource threshold.

[0157] Aspect 6: The method according to any one of Aspects 1-5 further includes: determining an implicit indication for indicating the resource set; and determining the resource set at least in part based on the implicit indication.

[0158] Aspect 7: According to the method of aspect 6, determining the implicit indication includes: determining the implicit indication at least in part based on the determination that the number of resources in the resource set fails to meet a resource threshold.

[0159] Aspect 8: The method according to any one of Aspects 6 or 7, wherein the implicit indication includes a function for the set of sub-channels for previous transmissions.

[0160] Aspect 9: The method according to any one of Aspects 6-8, wherein the previous transmission is the most recent transmission.

[0161] Aspect 10: According to the method of aspect 8, wherein the implicit indication includes the index of the starting subchannel in the subchannel set.

[0162] Aspect 11: The method according to any one of Aspects 8-10, wherein the implicit indication includes an index of the starting resource block of the resource set.

[0163] Aspect 12: The method according to any one of Aspects 8-11 further includes: determining the implicit indication based at least in part on: determining the previous transmission based at least in part on a plurality of monitoring opportunities associated with time slots spanning the plurality of component carriers.

[0164] Aspect 13: The method according to any one of aspects 8-12 further includes: determining the implicit indication based at least in part on the following: determining the previous transmission based at least in part on time periods associated with a plurality of time slots.

[0165] Aspect 14: The method according to any one of Aspects 6-13, wherein the implicit indication includes at least one of the following: source identifier (ID), destination ID, time slot ID, sidelink area ID, resource pool ID, sidelink component carrier ID, or bandwidth portion ID.

[0166] Aspect 15: The method according to aspect 14 further includes: determining a subset of the resource pool based at least in part on the implicit indication; and determining the resource set based at least in part on the PSFCH resource indication.

[0167] Aspect 16: According to the method of aspect 15, determining the subset of the resource pool includes: determining the subset of the resource pool at least in part based on the determination of the resource pool.

[0168] Aspect 17: The method according to any one of Aspects 15 or 16, wherein determining the subset of the resource pool comprises: determining the subset of the resource pool based at least in part on the determination of a single carrier.

[0169] Aspect 18: The method according to any one of Aspects 15-17, wherein determining the subset of the resource pool comprises: determining the subset of the resource pool based at least in part on the broadcast type associated with sending the plurality of HARQ-ACK feedback indications.

[0170] Aspect 19: The method according to any one of aspects 15-18 further includes: receiving the implicit indication from a base station.

[0171] Aspect 20: The method according to any one of aspects 6-19 further includes: receiving the implicit indication from the base station via a relay device.

[0172] Aspect 21: The method according to any one of Aspects 6-20 further includes: determining the implicit indication at least in part based on negotiation with the additional UE.

[0173] Aspect 22: The method according to any one of aspects 1-21 further includes: determining the PSSCH to HARQ gap based at least in part on explicit instructions.

[0174] Aspect 23: The method according to any one of aspects 1-22 further includes: determining the PSSCH to HARQ gap based at least in part on implicit indications.

[0175] Aspect 24: The method according to any one of Aspects 1-23, wherein sending the plurality of HARQ-ACK feedback indications comprises: sending a first set of HARQ-ACK feedback indications among the plurality of HARQ-ACK feedback indications; and discarding a second set of HARQ-ACK feedback indications at least in part based on at least one of the format of the set of HARQ-ACK feedback indications or the payload of the set of HARQ-ACK feedback indications.

[0176] Aspect 25: A method of wireless communication performed by a user equipment (UE), comprising: transmitting a plurality of physical side-link shared channel (PSSCH) communications on a plurality of side-link component carriers; and receiving a plurality of hybrid automatic repeat request acknowledgment (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on a determination of the resource set, wherein the determination of the resource set is based at least in part on a physical side-link feedback channel (PSFCH) format.

[0177] Aspect 26: The method according to aspect 25 further includes: sending an explicit indication for indicating the resource set, wherein the determination of the resource set is based at least in part on the explicit indication.

[0178] Aspect 27: The method according to aspect 26 further includes: receiving the explicit instruction from the base station.

[0179] Aspect 28: The method according to any one of Aspects 26 or 27, wherein sending the explicit indication comprises: sending the explicit indication based at least in part on a determination regarding the quantity of resources in the resource set satisfying a resource threshold.

[0180] Aspect 29: The method according to any one of Aspects 25-28, wherein the determination of the resource set is based at least in part on the determination of the implicit indication.

[0181] Aspect 30: The method according to aspect 29, wherein the determination of the implicit indication is based at least in part on the determination that the number of resources in the resource set fails to meet the resource threshold.

[0182] Aspect 31: The method according to any one of Aspects 29 or 30, wherein the implicit indication includes a function for the set of sub-channels for previous transmissions.

[0183] Aspect 32: The method according to any one of Aspects 30-31, wherein the implicit indication includes the index of the starting subchannel in the set of subchannels.

[0184] Aspect 33: The method according to any one of Aspects 29-32, wherein the implicit indication includes an index of the starting resource block of the resource set.

[0185] Aspect 34: The method according to any one of Aspects 29-33, wherein the determination of the implicit indication is based at least in part on the determination of previous transmissions based at least in part on multiple monitoring opportunities associated with time slots spanning the plurality of component carriers.

[0186] Aspect 35: The method according to any one of Aspects 29-34, wherein the determination of the implicit indication is based at least in part on the determination of previous transmissions based at least in part on time periods associated with a plurality of time slots.

[0187] Aspect 36: The method according to any one of Aspects 29-35, wherein the implicit indication includes at least one of the following: source identifier (ID), destination ID, time slot ID, sidelink area ID, resource pool ID, sidelink component carrier ID, or bandwidth portion ID.

[0188] Aspect 37: The method according to aspect 36, wherein the determination of the resource set is based at least in part on: at least in part on the determination of a subset of the resource pool based on the implicit indication; and on the determination of the PSFCH resource indication.

[0189] Aspect 38: The method according to aspect 37, wherein the determination of the subset of the resource pool is at least in part based on the determination of the resource pool.

[0190] Aspect 39: The method according to any one of Aspects 37 or 38, wherein the determination of the subset of the resource pool is based at least in part on the determination of a single carrier.

[0191] Aspect 40: The method according to any one of Aspects 37-39, wherein the determination of the subset of the resource pool is based at least in part on the broadcast type associated with sending the plurality of HARQ-ACK feedback indications.

[0192] Aspect 41: The method according to any one of Aspects 37-40, wherein the determination of the implicit indication is based at least in part on negotiation with the additional UE.

[0193] Aspect 42: 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 the method according to one or more of aspects 1-24.

[0194] Aspect 43: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method according to one or more of aspects 1-24.

[0195] Aspect 44: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 1-24.

[0196] Aspect 45: A non-transitory computer-readable medium storing code for wireless communication, said code comprising instructions executable by a processor to perform the methods described in accordance with one or more of aspects 1-24.

[0197] Aspect 46: A non-transitory 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 device, cause the device to perform the method according to one or more aspects of aspects 1-24.

[0198] Aspect 47: 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 the method according to one or more of aspects 25-41.

[0199] Aspect 48: 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 the method according to one or more aspects of aspects 25-41.

[0200] Aspect 49: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more aspects 25-41.

[0201] Aspect 50: A non-transitory computer-readable medium storing code for wireless communication, said code comprising instructions executable by a processor to perform the methods described in one or more of aspects 25-41.

[0202] Aspect 51: A non-transitory 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 device, cause the device to perform the method according to one or more aspects of aspects 25-41.

[0203] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made based on the foregoing disclosure, or modifications and variations may be derived from practice in the aspects.

[0204] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, "software" should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, and other examples. 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 using various forms of hardware and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not a limitation in any respect. Therefore, while the operation and behavior of systems and / or methods are described herein without reference to specific software code, it is to be understood that software and hardware can be designed to implement systems and / or methods, at least in part, based on the descriptions herein.

[0205] As used in this article, depending on the context, satisfying the 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.

[0206] Even if a specific combination of features is recited in the claims and / or disclosed in the specification, such combinations are not intended to limit the disclosure of the aspects. In fact, many of these features can be combined in ways that are not specifically recited in the claims and / or specifically disclosed in the specification. While each dependent claim listed below may directly depend on only one claim, the disclosure of an aspect includes a combination of each dependent claim with every other claim in the claim set. As used herein, the phrase “at least one of” in the list of items refers to any combination of those items, including single members. For 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 of multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0207] None of the elements, actions, or instructions used herein should be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items referenced in combination with the article “the” and is interchangeable 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 are interchangeable with “one or more.” Where only one item is anticipated, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.” Furthermore, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or” unless otherwise expressly stated (e.g., if used in conjunction with “any” or “only one of”).

Claims

1. A user equipment (UE) for wireless communication, comprising: One or more memory units; as well as One or more processors coupled to the one or more memories, the one or more processors being configured to: Receive multiple physical side crosslink shared channel (PSSCH) communications on multiple side crosslink component carriers; and Using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on the determination of the resource set, a plurality of Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications are transmitted, wherein the plurality of HARQ-ACK feedback indications include a first HARQ-ACK feedback indication set, and wherein the determination of the resource set is based at least in part on the Physical Side-Link Feedback Channel (PSFCH) format; and The second HARQ-ACK feedback indication set is discarded, at least in part, based on the format of the second HARQ-ACK feedback indication set.

2. The UE according to claim 1, wherein, The one or more processors are further configured to: Receive an instruction for indicating the set of resources; and The resource set is determined at least in part based on the indication, wherein the indication includes at least one of explicit or implicit indications.

3. The UE according to claim 2, wherein, The one or more processors are further configured to receive the explicit indication from an additional UE, wherein, when receiving the plurality of PSSCH communications, the one or more processors are configured to receive the plurality of PSSCH communications from the additional UE.

4. The UE according to claim 2, wherein, When the explicit instruction is received, the one or more processors are configured to receive the explicit instruction based at least in part on a determination of whether the number of resources in the resource set meets a resource threshold.

5. The UE according to claim 2, wherein, When the implicit indication is determined, the one or more processors are configured to determine the implicit indication at least in part based on a determination that the number of resources in the resource set fails to meet a resource threshold.

6. The UE according to claim 2, wherein, The implicit indication includes a function for the set of sub-channels used in previous transmissions.

7. The UE according to claim 6, wherein, The previous transmission is the most recent transmission.

8. The UE according to claim 6, wherein, The implicit indication includes an index to at least one of the following: the starting subchannel in the subchannel set, or the starting resource block in the resource set.

9. The UE according to claim 6, wherein, The one or more processors are also configured to determine the implicit indication based at least in part on multiple monitoring opportunities associated with time slots spanning the multiple side link component carriers.

10. The UE according to claim 2, wherein, The implicit indication includes at least one of the following: Source Identifier (ID), Destination ID Slot ID, Side link area ID, Resource pool ID, Side link component carrier ID, or Bandwidth section ID.

11. The UE according to claim 10, wherein, The one or more processors are further configured to: A subset of the resource pool is determined at least in part based on the implicit indication; and The resource set is determined at least in part based on the PSFCH resource indication.

12. The UE according to claim 11, wherein, When determining the subset of the resource pool, the one or more processors are configured to determine the subset of the resource pool based at least in part on the determination of at least one of the following: the broadcast type associated with sending the plurality of HARQ-ACK feedback indications, the resource pool, or the single component carrier.

13. The UE according to claim 2, wherein, The one or more processors are also configured to determine the implicit indication at least in part based on negotiation with the additional UE.

14. The UE according to claim 1, wherein, The one or more processors are also configured to determine the PSSCH to HARQ gap based at least in part on at least one of the following: explicit indication or implicit indication.

15. The UE according to claim 1, wherein, When the second HARQ-ACK feedback indication set is discarded, the one or more processors are configured to: Furthermore, the second HARQ-ACK feedback indication set is discarded, at least in part, based on the payload of the HARQ-ACK feedback indication set.

16. A method for wireless communication performed by a user equipment (UE), comprising: Receive multiple physical side crosslink shared channel (PSSCH) communications on multiple side crosslink component carriers; Using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on the determination of the resource set, a plurality of Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications are transmitted, wherein the plurality of HARQ-ACK feedback indications include a first HARQ-ACK feedback indication set, and wherein the determination of the resource set is based at least in part on the Physical Side-Link Feedback Channel (PSFCH) format; and The second HARQ-ACK feedback indication set is discarded, at least in part, based on the format of the second HARQ-ACK feedback indication set.

17. The method of claim 16, further comprising: Receive an instruction for indicating the set of resources; and The resource set is determined at least in part based on the indication, wherein the indication includes at least one of the following: an explicit indication or an implicit indication.

18. The method of claim 17, further comprising: Receiving the explicit indication from an additional UE, wherein receiving the plurality of PSSCH communications includes: receiving the plurality of PSSCH communications from the additional UE.

19. The method according to claim 17, wherein, Receiving the explicit instruction includes receiving the explicit instruction based at least in part on a determination regarding the number of resources in the resource set that satisfies a resource threshold.

20. The method of claim 17, wherein, Determining the implicit indication includes: determining the implicit indication based at least in part on a determination that the number of resources in the resource set fails to meet a resource threshold.

21. The method according to claim 17, wherein, The implicit indication includes a function for the set of sub-channels used in previous transmissions.

22. The method according to claim 21, wherein, The previous transmission is the most recent transmission.

23. The method according to claim 21, wherein, The implicit indication includes an index to at least one of the following: the starting subchannel in the subchannel set, or the starting resource block in the resource set.

24. The method of claim 21, further comprising: The implicit indication is determined at least in part based on the following: the previous transmission is determined at least in part based on multiple monitoring opportunities associated with time slots spanning the multiple side link component carriers.

25. The method according to claim 17, wherein, The implicit indication includes at least one of the following: Source Identifier (ID), Destination ID Slot ID, Side link area ID, Resource pool ID, Side link component carrier ID, or Bandwidth section ID.

26. The method of claim 25, further comprising: A subset of the resource pool is determined at least in part based on the implicit indication; as well as The resource set is determined at least in part based on the PSFCH resource indication.

27. The method according to claim 26, wherein, Determining the subset of the resource pool includes determining the subset of the resource pool based at least in part on the following: the broadcast type associated with sending the plurality of HARQ-ACK feedback indications, and the determination of at least one of the resource pool or the individual component carrier.

28. The method of claim 17, further comprising: The implicit indication is determined at least in part based on negotiation with the additional UE.

29. The method of claim 16, further comprising determining the PSSCH to HARQ gap based at least in part on at least one of the following: explicit indication or implicit indication.

30. The method of claim 16, wherein, The set of second HARQ-ACK feedback indications to be discarded includes: Furthermore, the second HARQ-ACK feedback indication set is discarded, at least in part, based on the payload of the HARQ-ACK feedback indication set.

31. A non-transitory computer-readable medium storing a set of instructions for wireless communication, comprising one or more instructions that, when executed by one or more processors of a UE, cause the UE to perform the following operations: Receive multiple physical side crosslink shared channel (PSSCH) communications on multiple side crosslink component carriers; Using a resource set on a single component carrier among the plurality of side-link component carriers and based at least in part on the determination of the resource set, multiple Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications are transmitted, wherein, The plurality of HARQ-ACK feedback indications includes a first HARQ-ACK feedback indication set, wherein the determination of the resource set is at least in part based on the Physical Side Link Feedback Channel (PSFCH) format; and The second HARQ-ACK feedback indication set is discarded, at least in part, based on the format of the second HARQ-ACK feedback indication set.

32. The non-transitory computer-readable medium according to claim 31, wherein, The one or more instructions, when executed by the one or more processors of the UE, also cause the UE to perform the method according to any one of claims 16 to 30.

33. An apparatus for wireless communication includes: A unit used to receive multiple physical side link shared channel (PSSCH) communications on multiple side link component carriers; A unit for transmitting multiple Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) feedback indications corresponding to the multiple PSSCH communications, using a resource set on a single component carrier among the multiple side-link component carriers and based at least in part on the determination of the resource set, wherein the multiple HARQ-ACK feedback indications include a first HARQ-ACK feedback indication set, and wherein the determination of the resource set is based at least in part on the Physical Side-Link Feedback Channel (PSFCH) format; and The unit of the second HARQ-ACK feedback indication set is used to discard the unit in a format that is at least partially based on the second HARQ-ACK feedback indication set.

34. The apparatus of claim 33, further comprising: A unit for performing the method according to any one of claims 16 to 30.

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