Hybrid automatic repeat request feedback resource configuration for sidelink with carrier aggregation

Abstract

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive a plurality of physical sidelink shared channel (PSSCH) communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation. The UE can transmit, using a set of resources on a single component carrier of the plurality of sidelink component carriers, a plurality of hybrid automatic repeat request acknowledgement feedback indications corresponding to the plurality of PSSCH communications. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This Patent Application claims priority to U.S. Nonprovisional Patent Application No. 17 / 125,849, filed December 17, 2020, for “HYBRID AUTOMATIC REPEAT REQUEST FEEDBACK RESOURCE CONFIGURATION FOR SIDELINK WITH CARRIER AGGREGATION,” which is hereby expressly incorporated by reference herein in its entirety. TECHNICAL FIELD

[0003] Aspects of the disclosure relate generally to wireless communication, and more specifically to techniques and apparatuses for hybrid automatic repeat request feedback resource configuration for sidelink with carrier aggregation. BACKGROUND

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems can employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3 GPP).

[0005] A wireless network can include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A user equipment (UE) can communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the 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 can be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a new radio (NR) BS, a 5G Node B, and / or the like.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols to communicate between user equipment (UE) and base stations, e.g., LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP), a wireless protocol to support mobile communications using distributed units (DUs) (e.g., remote radio heads) connected to a central unit (CU) or access network controller (ANC), e.g., 5G NR, a wireless protocol to support mobile communications released by the 3GPP, and others. The 3GPP now has defined LTE-Advanced (denoted as LTE-A) and New Radio (NR) standards. NR is a set of enhancements to the LTE mobile standard promulgated by the 3GPP cell performance. It is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDM with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP- OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM)) on the uplink (UL), as well as promoting SUMMARY

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) includes receiving a plurality of physical sidelink shared channel (PSSCH) communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and transmitting, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[0008] In some aspects, a method of wireless communication performed by a user equipment (UE) includes receiving a plurality of physical sidelink shared channel (PSSCH) communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and transmitting, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[0009] In some aspects, a method of wireless communication performed by a user equipment (UE) includes receiving a plurality of physical sidelink shared channel (PSSCH) communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and transmitting, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[0010] 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 configured to: transmit a plurality of PSSCH communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and receive, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[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 sidelink component carriers of a sidelink network with carrier aggregation; and transmit, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[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 sidelink component carriers of a sidelink network with carrier aggregation; and receive, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[0013] In some aspects, an apparatus for wireless communication includes means for receiving a plurality of PSSCH communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and means for transmitting, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[0014] In some aspects, an apparatus for wireless communication includes means for transmitting a plurality of PSSCH communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and means for receiving, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[0015] The aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems, as substantially described herein with reference to and as illustrated by the accompanying drawings and specification.

[0016] The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows can be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be readily utilized as bases for modifying or designing other for carrying the same purposes thereof. Such equivalent constructions are not to depart from the scope of the appended claims. The present disclosure, both as to organization and method of operation, together with features and advantages thereof can best be understood by reference to the following description taken in connection with the accompanying drawings. Each of the drawings is provided for the purposes of illustration and description and not as a definition of the limits of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0017] So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, can be had by reference to various aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description can admit to other equally effective aspects. Like reference numerals in different drawings can identify the same or similar elements.

[0018] Figure 1 FIG. 1 is a diagram illustrating an example of a wireless network according to various aspects of the present disclosure.

[0019] Figure 2 FIG. 2 is a diagram illustrating an example of a base station in communication with a UE in a wireless network according to various aspects of the present disclosure.

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

[0021] Figure 4 FIG. 4 is a diagram illustrating an example of sidelink communication and access link communication according to various aspects of the present disclosure.

[0022] Figure 5 FIG. 5 is a diagram illustrating an example of sidelink feedback channel resource determination according to various aspects of the present disclosure.

[0023] Figure 6 FIG. 6 is a diagram illustrating an example of sidelink feedback for multiple sidelink component carriers according to various aspects of the present disclosure.

[0024] Figure 7 FIG. 1 is a diagram illustrating an example of a wireless communications system that supports hybrid automatic repeat request (HARQ) feedback resource configuration for sidelink with carrier aggregation in accordance with various aspects of the present disclosure.

[0025] Figures 8-12 FIG. 2 is a diagram illustrating an example of HARQ feedback resource configuration for sidelink with carrier aggregation in accordance with various aspects of the present disclosure.

[0026] Figure 13 and 14 FIG. 3 is a diagram illustrating an example process for HARQ feedback resource configuration for sidelink with carrier aggregation in accordance with various aspects of the present disclosure.

[0027] Figure 15 FIG. 4 is a block diagram of an example apparatus for wireless communication in accordance with various aspects of the present disclosure. DETAILED DESCRIPTION

[0028] Various aspects of the disclosure are more fully described below with reference to the figures. The disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific 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 the disclosure to those skilled in the art. Based on the teachings herein one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using, in addition to or in place of the aspects set forth herein, other structures, functionalities, or structures and

[0029] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0030] It should be noted that while aspects can be described herein using terminology commonly associated with a 5G or NR radio access technology (RAT), aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and / or a RAT subsequent to 5G (e.g., 6G).

[0031] Figure 1 FIG. 1 is a diagram illustrating an example of a wireless network 100, in accordance with various aspects of the present disclosure. The wireless network 100 can be or include elements of a 5G (NR) network and / or a LTE network, among other examples. The wireless network 100 can include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 1 lOd) and other network entities. A base station (BS) is an entity that communicates with user equipment (UEs) and can also be referred to as an NR BS, a NodeB, a gNB, a 5G nodeB (NB), an access point, a transmit receive point (TRP), or the like. Each BS can provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to a coverage area of a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0032] BSs can provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell can cover a relatively large geographic area (e.g., several kilometers in radius) and can allow unrestricted access by UEs with service subscriptions appropriate for the Figure 1 In an example shown in FIG. 1, the BS 110a can be a macro BS for a macro cell 102a, the BS 110b can be a pico BS for a pico cell 102b, and the BS 110c can be a femto BS for a femto cell 102c. A BS can be referred to as a gNB, NodeB, eNodeB (eNB), Home Base Station (Home BS), or some other similar terminology, which can depend on the technology generation and / or specific terminology used in a given context. In the example of FIG. 1, a geographic area 101 of the wireless network 100 can be split into a macro cell area 101a (which can be covered by the macro cell 102a), a pico cell area 101b (which can be covered by the pico cell 102b), and a femto cell area 101c (which can be covered by the femto cell 102c). The wireless network 100 can include one or more BSs, which communicate with UEs 120 (which can be more generally referred to as a user equipment (UE)) and / or other base stations and network entities. A BS can communicate with the UEs 120 under the control of a serving base station controller (BSC) 130 for a 5G network or a base station controller (BSC) 130 for an E-UTRAN (e.g., that can be a part of a 4G network). In this example, the BSC 130 can be part of a mobile core network (MCN) 140. The BSs 110 can also communicate with one another, e.g., directly or through a backhaul network, to hand over UEs 120 traveling between different geographic areas and / or to co-ordinate operations between BSs 110.

[0033] In some aspects, a cell can not necessarily be stationary, and the geographic area of the cell can move based on the location of a mobile BS. In some aspects, BSs can be interconnected to one another and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transmission network, including a direct physical connection or a virtual network.

[0034] Wireless network 100 can also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in Figure 1, a relay BS 1 lOd can communicate with macro BS 110a and a UE 120d in order to facilitate communications between the BS 110a and UE 120d. A relay BS can also be referred to as a relay station, a relay base station, a relay, or the like.

[0035] Wireless network 100 can be a heterogeneous network that includes BSs of different types, such as macro BSs, pico BSs, femto BSs, relay BSs, or the like. These different types of BSs can have different transmit power levels, different coverage areas, and different impacts on interference. For example, macro BSs can have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs can have relatively lower transmit power levels (e.g., 0.1 to 2 Watts).

[0036] A network controller 130 can couple to a set of BSs and can provide coordination and control for these BSs. Network controller 130 can be in communication with the BSs via a backhaul. The BSs can also communicate with one another directly or indirectly via a wireless or wireline backhaul.

[0037] The UEs 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. A UE can also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc. A UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, a smart jewel (e.g., a smart ring, a smart bracelet, etc.), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicular component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.

[0038] Some UEs can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, e.g., robots, drones, remote devices, sensors, meters, monitors, and / or location tags, that can communicate with a base station, another device (e.g., remote device), or some other entity. A wireless node can provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs can be considered Intemet-of-Things (IoT) devices, and / or can be implemented as NB-IoT (narrowband

[0039] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a particular RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, an air interface, etc. A frequency can also be referred to as a carrier, a frequency channel, etc. Each frequency can support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0040] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another). For example, UEs 120 can communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, vehicle-to-everything (V2X) protocols (which can include vehicle-to- vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), and / or netw orked communications. In this case, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base stations 110.

[0041] Devices of wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided, based on frequency or wavelength, into various classes, bands, channels, and / or the like. For example, devices of wireless network 100 can communicate using an operating band having a first frequency range (FR1), which can span, for example, from 410 MHz to 7.125 GHz, and / or can communicate using an operating band having a second frequency range (FR2), which can span, for example, from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid- frequencies. Notably, although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a “sub-6 GHz” frequency band. Similarly, FR2 is often referred to as a “millimeter wave” frequency band, despite being different from the extremely high frequency (EHF) frequency band, which is identified by the International Telecommunications Union (ITU) as spanning from 30 GHz to 300 GHz. Thus, unless specifically stated otherwise, the term “sub-6 GHz” or the like, if used herein, can broadly represent frequencies less than 6 GHz, frequencies within FR1, and / or mid-frequencies (e.g., greater than 7.125 GHz). Similarly, unless specifically stated otherwise, the term “millimeter wave” or the like, if used herein, can broadly represent frequencies within the EHF band, frequencies within FR2, and / or mid-frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 can be modified, and, as such, the techniques described herein are applicable to those modified frequency ranges.

[0042] As indicated above, Figure 1 are provided as examples. Other examples can differ from what is described with respect to at least one of the Figure 1 described examples.

[0043] Figure 2is a diagram illustrating an example of a base station 110 in communication with a UE 120 in a wireless network, in accordance with various aspects of the present disclosure. Base stations 110 can be equipped with T antennas 234a through 234t, and UEs 120 can be equipped with R antennas 252a through 252r, where in general T > 1 and R > 1.

[0044] At base station 110, a transmit processor 220 can receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. Transmit processor 220 can also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling) and provide overhead symbols and control symbols. Transmit processor 220 can also generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and can provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 can process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t can be transmitted via T antennas 234a through 234t, respectively.

[0045] At the UE 120, the antennas 252a-252r can receive the downlink signals from the base station 110 and / or other base stations and can provide received signals to the demodulators (DEMODs) 254a-254r, respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 can obtain received symbols from all R demodulators 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The term “controller / processor” can refer to one or more controllers, one or more processors, or a combination thereof. A channel processor can determine reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal received quality (RSRQ) parameters, and / or channel quality indicator (CQI) parameters, among other examples. In some aspects, one or more components of UE 120 can be included in a housing 284.

[0046] The network controller 130 can include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 can include, for example, one or more devices in a core network. The network controller 130 can communicate with the base station 110 via the communication unit 294.

[0047] Antennas (e.g., antennas 234a-234t and / or antennas 252a-252r) can include or be included within one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, among other examples. An antenna panel, antenna group, antenna element set, and / or antenna array can include one or more antenna elements. An antenna panel, antenna group, antenna element set, and / or antenna array can include a set of co-planar antenna elements and / or a set of non-co-planar antenna elements. An antenna panel, antenna group, antenna element set, and / or antenna array can include antenna elements within a single housing and / or antenna elements within multiple housings. An antenna panel, antenna group, antenna element set, and / or antenna array can include one or more antenna elements coupled to one or more transmit and / or receive components (such as one or more components of a transceiver 264 and / or a wireless communication and / or processing component 270). Figure 2 An antenna panel, antenna group, antenna element set, and / or antenna array can include one or more antenna elements coupled to one or more transmit and / or receive components (such as one or more components of a transceiver 264 and / or a wireless communication and / or processing component 270).

[0048] On the uplink, at UE 120, a transmit processor 264 can receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from controller / processor 280. Transmit processor 264 can also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 can be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, a modulator and a demodulator (e.g., MOD / DEMOD 254) of the UE 120 can be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver can include any combination of antennas 252, modulators and / or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver can be used by a processor (e.g., controller / processor 280) and memory 282 to perform any of the methods described herein (for example, as described with reference to Figures 6-14 FIGS. 15 and 16).

[0049] At base station 110, the uplink signals from UE 120 and other UEs can be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 can provide the decoded data to a data sink 239 and the decoded control information to controller / processor 240. Base station 110 can include communication unit 244 and communicate to network controller 130 via communication unit 244. Base station 110 can include a scheduler 246 to schedule UEs 120 for downlink and / or uplink communications. In some aspects, a modulator and a demodulator (e.g., MOD / DEMOD 232) of the base station 110 can be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver can include any combination of antennas 234, modulators and / or demodulators 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver can be used by a processor (e.g., controller / processor 240) and memory 242 to perform any of the methods described herein (for example, as described with reference to Figures 6-14 FIGS. 15 and 16).

[0050] 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 Hybrid Automatic Repeat Request (HARQ) feedback resource configuration for sidelinks with carrier aggregation, 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 13 Process 1300 Figure 14 The operation of process 1400 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 13 Process 1300 Figure 14 The operation of process 1400 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.

[0051] In some aspects, the UE may include: elements for receiving multiple Physical Side Link Shared Channel (PSSCH) communications on multiple side link component carriers of a side link network with carrier aggregation; and / or elements for using a resource set on a single component carrier among the multiple side link component carriers to transmit multiple Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) feedback indications corresponding to the multiple PSSCH communications. Elements 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.

[0052] In some aspects, the UE includes: a unit for receiving first PSSCH communication on a first component carrier among a plurality of side-link component carriers; and / or a unit for receiving second PSSCH communication on a second component carrier among a plurality of side-link component carriers, wherein the second component carrier is different from the first component carrier.

[0053] In some aspects, the UE includes means for transmitting a first HARQ-ACK feedback indication using a first PSFCH format 2 transmission; and / or means for transmitting a second HARQ-ACK feedback indication using a second PSFCH format 2 transmission. In some aspects, the UE includes means for transmitting the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a first slot; and / or means for transmitting the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a second slot. In some aspects, the UE includes means for transmitting the first HARQ-ACK feedback indication using a first set of symbols corresponding to a slot; and / or means for transmitting the first HARQ-ACK feedback indication using a second set of symbols corresponding to the slot.

[0054] In some aspects, the UE includes means for transmitting a first HARQ-ACK feedback indication using a PSFCH format 0 transmission; and / or means for transmitting a second HARQ-ACK feedback indication using a PSFCH format 2 transmission. In some aspects, the UE includes means for transmitting the first HARQ-ACK feedback indication using a first set of resources of a slot of a set of slots; and / or means for transmitting the second HARQ-ACK feedback indication using a second set of resources of the slot. In some aspects, the UE includes means for transmitting the first HARQ-ACK feedback indication using a first set of resources of a first subset of slots of the set of slots; and / or means for transmitting the second HARQ-ACK feedback indication using a second set of resources of a second subset of slots of the set of slots.

[0055] In some aspects, the UE includes means for reporting a plurality of HARQ-ACK feedback indications as dedicated medium access control (MAC) control elements; means for piggybacking the plurality of HARQ-ACK feedback indications on a set of PSSCH resources; means for reporting the plurality of HARQ-ACK feedback indications using a dedicated sidelink control information (SCI) format 2; and / or means for reporting the plurality of HARQ-ACK feedback indications using a dedicated SCI format 1.

[0056] In some aspects, the UE includes means for receiving an indication of a set of PSSCH resources from a base station. In some aspects, the UE includes means for receiving an allocation of a reporting resource; and / or means for reporting the indication of the set of PSSCH resources to an additional UE using the reporting resource. In some aspects, the UE includes means for receiving an indication of a selection of the set of PSSCH resources from another UE.

[0057] In some aspects, the UE can include means for transmitting a plurality of PSSCH communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and / or means for receiving a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using a set of resources on a single component carrier of the plurality of sidelink component carriers. Means for the UE to perform operations described herein can 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.

[0058] In some aspects, the UE includes means for transmitting a first PSSCH communication on a first component carrier of a plurality of sidelink component carriers; and / or means for transmitting a second PSSCH communication on a second component carrier of the plurality of sidelink component carriers, wherein the second component carrier is different from the first carrier. In some aspects, the UE includes means for receiving a first HARQ-ACK feedback indication using a first PSFCH format 2 transmission; and / or means for receiving a second HARQ-ACK feedback indication using a second PSFCH format 2 transmission.

[0059] In some aspects, the UE includes means for receiving the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a first slot; and / or means for receiving the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a second slot. In some aspects, the UE includes means for receiving the first HARQ-ACK feedback indication using a first set of symbols corresponding to a slot; and / or means for receiving the first HARQ-ACK feedback indication using a second set of symbols corresponding to the slot.

[0060] In some aspects, the UE includes means for receiving the first HARQ-ACK feedback indication using a PSFCH format 0 transmission; and / or means for receiving the second HARQ-ACK feedback indication using a PSFCH format 2 transmission. In some aspects, the UE includes means for receiving the first HARQ-ACK feedback indication using a first set of resources of a slot of a set of slots; and / or means for receiving the second HARQ-ACK feedback indication using a second set of resources of the slot. In some aspects, the UE includes means for receiving the first HARQ-ACK feedback indication using a first set of resources of a first subset of slots of the set of slots; and / or means for receiving the second HARQ-ACK feedback indication using a second set of resources of a second subset of slots of the set of slots.

[0061] In some aspects, the UE includes means for receiving a plurality of HARQ-ACK feedback indications as a dedicated MAC-CE; means for receiving a set of PSSCH resources, wherein the plurality of HARQ-ACK feedback indications are piggybacked on the set of PSSCH resources; means for receiving the plurality of HARQ-ACK feedback indications using a dedicated Sidelink Control Information (SCI) format 2; and / or means for receiving the plurality of HARQ-ACK feedback indications using a dedicated SCI format 1. In some aspects, the UE includes means for receiving an indication of the set of PSSCH resources from a base station. In some aspects, the UE includes means for receiving an indication of the set of PSSCH resources from an additional UE.

[0062] Although Figure 2 The blocks in FIG. 13 are illustrated as distinct components, but the functionality described above with respect to these blocks can be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by controller / processor 280 or under its control.

[0063] As indicated above, Figure 2 are provided as examples. Other examples can differ from what is described with respect to Figure 2 the examples described with respect to FIG. 13.

[0064] Figure 3 is a diagram illustrating an example 300 of sidelink communications, in accordance with various aspects of the present disclosure.

[0065] As Figure 3 indicated, a first UE 305-1 can communicate with a second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. The UEs 305-1 and 305-2 can communicate using the one or more sidelink channels 310 for P2P communications, D2D communications, V2X communications (which can include V2V communications, V2I communications, V2P communications, etc.), mesh networks, and / or the like. In some aspects, the UEs 305 (e.g., UE 305-1 and / or UE 305-2) can correspond to one or more other UEs described elsewhere herein, such as the 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., a 5.9 GHz band). Additionally, or alternatively, the UEs 305 can synchronize timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, symbols, etc.) using global navigation satellite system (GNSS) timing.

[0066] As Figure 3Further, the one or more sidelink channels 310 can 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 a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communications with base stations 110 via an access link or access channel, the PSCCH 315 can be used to convey control information. Similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communications with base stations 110 via an access link or access channel, the PSSCH 320 can be used to convey data. For example, the PSCCH 315 can carry sidelink control information (SCI) 330, which can indicate various control information for sidelink communications, such as one or more resources (e.g., time resources, frequency resources, spatial resources, etc.) where a transport block (TB) 335 can be carried on the PSSCH 320. The TB 335 can include data. The PSFCH 325 can be used to convey sidelink feedback 340, such as hybrid automatic repeat request (HARQ) feedback (e.g., acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), scheduling request (SR), etc.

[0067] In some aspects, the one or more sidelink channels 310 can use resource pools. For example, a scheduling assignment (e.g., included in SCI 330) can be transmitted in a subchannel using specific resource blocks (RBs) across time. In some aspects, a data transmission associated with the scheduling assignment (e.g., on PSSCH 320) can occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, the scheduling assignment and associated data transmission are not transmitted on adjacent RBs.

[0068] In some aspects, the UE 305 can operate using a transmission mode in which resource selection and / or scheduling is performed by the UE 305 (e.g., rather than a base station 110). In some aspects, the UE 305 can perform resource selection and / or scheduling by sensing channel availability for transmissions. For example, the UE 305 can measure a received signal strength indicator (RSSI) parameter (e.g., a sidelink RSSI (S-RSSI) parameter) associated with various sidelink channels, can measure a reference signal received power (RSRP) parameter (e.g., a PSSCH-RSRP parameter) associated with various sidelink channels, can measure a reference signal received quality (RSRQ) parameter (e.g., a PSSCH-RSRQ parameter) associated with various sidelink channels, and / or the like, and can select a channel for a transmission of a sidelink communication based at least in part on the measurements.

[0069] Additionally, or alternatively, the UE 305 can perform resource selection and / or scheduling using SCI 330 received in the PSCCH 315, which can indicate occupied resources, channel parameters, and / or the like. Additionally, or alternatively, the UE 305 can perform resource selection and / or scheduling by determining a channel busy ratio (CBR) associated with various sidelink channels, which can be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 can use for a particular set of subframes).

[0070] In transmission modes in which resource selection and / or scheduling is performed by the UE 305, the UE 305 can generate a sidelink grant and can transmit the grant in SCI 330. The sidelink grant can indicate, for example, one or more parameters (e.g., transmission parameters) for an upcoming sidelink transmission, such as one or more resource blocks to be used for an upcoming sidelink transmission on the PSSCH 320 (e.g., for a TB 335), one or more subframes to be used for the upcoming sidelink transmission, a modulation and coding scheme (MCS) to be used for the upcoming sidelink transmission, and / or the like. In some aspects, the UE 305 can generate a sidelink grant that indicates one or more parameters for a semi-persistent scheduling (SPS), such as a periodicity of sidelink transmissions. Additionally, or alternatively, the UE 305 can generate a sidelink grant for event-driven scheduling (e.g., for on-demand sidelink messages).

[0071] As indicated above, Figure 3 are provided as examples. Other examples can differ from what is described with respect to at least one of the Figure 3 described examples.

[0072] Figure 4is a diagram illustrating an example 400 of sidelink communications and access link communications, in accordance with various aspects of the present disclosure.

[0073] As Figure 4 illustrated, a transmitter (Tx) / receiver (Rx) UE 405 and an Rx / Tx UE 410 can communicate with one another via a sidelink, as described above in connection with Figure 3 FIG. 2. As further illustrated, in some sidelink modes, a base station 110 can communicate with the Tx / Rx UE 405 via a first access link. Additionally, or alternatively, in some sidelink modes, the base station 110 can communicate with the Rx / Tx UE 410 via a second access link. The Tx / Rx UE 405 and / or the Rx / Tx UE 410 can correspond to one or more UEs described elsewhere herein, such as the UEs 120 of Figure 1 FIG. 1. Thus, a direct link between UEs 120 (e.g., via a PC5 interface) can be referred to as a sidelink, and a direct link between a base station 110 and a UE 120 (e.g., via a Uu interface) can be referred to as an access link. Sidelink communications can be transmitted via a sidelink, and access link communications can be transmitted via an access link. Access link communications can be downlink communications (from a base station 110 to a UE 120) or uplink communications (from a UE 120 to a base station 110).

[0074] As noted above, Figure 4 is provided by way of example. Other examples can differ from what is described with respect to at least one of the described examples. Figure 4

[0075] Figure 5 is a diagram illustrating an example 500 of sidelink feedback channel resource determination, in accordance with various aspects of the present disclosure. Figure 5 A resource pool 505 is illustrated. The resource pool 505 includes 10 subchannels (N subch = 10), four of which are illustrated. A subchannel is a frequency domain subset of a resource pool. A resource pool can be configured with one or more subchannels. A resource pool can be configured with a PSFCH periodicity, which indicates a periodicity of PSFCH transmissions associated with the resource pool. In example 500, the resource pool 505 is configured with a PSFCH periodicity of 4 The PSFCH resources 510 indicated by the PSFCH periodicity are in the fourth slot of the resource pool 505.

[0076] A UE can allocate a configured number of physical resource blocks (PRBs) for the PSFCH resources 510. In example 500, the UE can allocate 80 PRBs for the PSFCH resources 510 ​A PRB is a set of subcarriers and can include 12 subcarriers. Since there are 4 slots between each PSFCH resource (due to ) and 10 subchannels in the resource pool (due to N subch ), each subchannel is associated with 2 PSFCH PRBs out of 80 PSFCH PRBs (e.g., 80 PRBs / (4 slots * 10 subchannels) = 2 PRBs). In this case, the sidelink feedback for a subchannel and a slot can be transmitted on 1 PSFCH PRB out of the 2 corresponding PSFCH PRBs. Referring to slot i and subchannel j, as shown in Figure 5 , a UE can allocate PRBs out of the PRBs to slot i and subchannel j, where and 0 ≤ j ≤ N subch .

[0077] As described above, the PSFCH resources 510 can be used to transmit HARQ feedback regarding PSSCHs received in the resource pool 505. The sidelink HARQ can be sequence-based and can carry a single bit per PSSCH. The sidelink HARQ can be transmitted on two consecutive symbols (e.g., symbols 11 and 12 of a slot). In some cases, one symbol before and one symbol after the PSFCH occasion can be allocated to a gap. A period parameter (e.g., periodPSFCHresource) can indicate a PSFCH periodicity (in terms of number of slots) of the resource pool. For example, the PSFCH periodicity can be set to a value in the set {0, 1, 2, 4}. If the PSFCH periodicity is set to 0, then PSFCH transmission from a UE in the resource pool is disabled. In the example 500, the PSFCH periodicity is set to 4, so PSFCH transmission is performed in every fourth slot. A UE can transmit a PSFCH in a first slot that includes a PSFCH resource and is at least a number of slots after a last slot of PSSCH reception provided by a parameter (e.g., MinTimeGapPSFCH) of the resource pool. A parameter (e.g., rbSetPSFCH) can indicate a set and / or a number of PRBs in the resource pool for PSFCH transmission. A parameter (e.g., numSubchannel) can indicate a number of N subch subchannels for the resource pool. A number of PSSCH slots associated with a PSFCH slot can be indicated, which can be determined based at least in part on the parameter periodPSFCHresource described above. In some aspects, and

[0078] As indicated above, Figure 5 are provided by way of example. Other examples can differ from those described. Figure 5

[0079] 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. Relative to a single carrier configuration, sidelink CA can improve sidelink throughput. For example, in sidelink CA, a first UE and a second UE can communicate with each other using multiple CCs. In some examples, sidelink CA can be implemented using multiple resource pools. For example, each CC of a sidelink CA configuration can include one or more bandwidth parts (BWPs), and each BWP can include one or more resource pools. In this way, each CC of a sidelink CA configuration can be associated with a respective one or more resource pools. The techniques and apparatuses described herein are not limited to techniques and apparatuses involving respective resource pools for each CC, and can be applied to cases 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, among other examples.

[0080] HARQ feedback provides a mechanism for indicating to a transmitter of a communication whether the communication was successfully received. For example, a transmitter can transmit scheduling information for a communication. A receiver of the scheduling information can monitor resources indicated by the scheduling information in order to receive the communication. If the receiver successfully receives the communication, the receiver can transmit an acknowledgement (ACK) in HARQ feedback. If the receiver fails to receive the communication, the receiver can transmit a negative ACK (NACK) in HARQ feedback. Thus, 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 a first value of the bit indicates an ACK and a second value of the bit indicates a NACK. Such a bit can be referred to as a HARQ-ACK bit. HARQ-ACK feedback can be conveyed in a HARQ codebook, which can include one or more bits indicating an ACK or a NACK corresponding to one or more communications.

[0081] ​For sidelink CA, HARQ feedback can be related to communications on multiple sidelink CCs. For example, a first UE can transmit HARQ feedback to a second UE regarding multiple PSSCHs on different CCs. As another example, a first UE can transmit separate HARQ feedback to multiple different UEs regarding PSSCHs received from multiple different UEs on different CCs. However, if the expected configuration of HARQ feedback does not align between the first UE and the second UE (or multiple different UEs), the HARQ feedback cannot be reliably interpreted by the recipient of the HARQ feedback. Failure to properly interpret HARQ feedback can result in reduced throughput, unnecessary retransmissions, and use of computing and communication resources.

[0082] Some techniques and apparatuses described herein provide HARQ feedback for sidelink UEs using sidelink CA configurations. For example, some techniques and apparatuses described herein provide for reporting sidelink HARQ feedback associated with PSSCH communications received using multiple component carriers. The HARQ feedback can be reported on a single component carrier. In some aspects, the HARQ feedback can include one bit for each received PSSCH communication. In some aspects, a mapping can be defined between PSSCH occasions across multiple carriers and PSFCH resources on a single carrier. In this way, ambiguity regarding the carrier on which to report HARQ is eliminated, which enables reliable use of HARQ feedback for sidelink CA configurations.

[0083] Figure 6 FIG. 6 is a diagram illustrating an example 600 of sidelink feedback for multiple sidelink component carriers, in accordance with various aspects of the present disclosure. Example 600 shows a first CC (CC0) and a second CC (CC1) that are sidelink 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 the transmitter UE are not shown in FIG. 6.

[0084] As shown, 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 shown by the arrows from the PSSCHs, the UE can provide HARQ feedback on the PSFCH transmitted via a designated set of CCs for the multiple PSSCHs. In example 600, the designated set of CCs includes only CC0, although other examples can include a different CC (e.g., CC1) or multiple CCs (e.g., CC0 and CC1). The HARQ feedback can be reported using resources that have been configured for reporting one or more bits of HARQ on a single component carrier. In some aspects, the timing of the resources (e.g., in which time slot and which symbols the PSFCH resources exist) can be the same, but the PSFCH format can be different for different feedback transmissions. For example, format 0 can be used to carry 1 or 2 bits of information, while format 2 can be used to carry more than 2 bits of information.

[0085] As indicated above, Figure 6 are provided by way of example. Other examples can differ from those described Figure 6 without departing from the spirit of the disclosure.

[0086] Figure 7 is a diagram illustrating an example 700 of signaling associated with HARQ feedback resource configuration for sidelink with carrier aggregation, in accordance with various aspects of the present disclosure. As shown, Figure 7 the first UE 705 and the second UE 710 can communicate with one another.

[0087] As shown by reference 715, the first UE 705 can transmit an indication of a HARQ configuration to the second UE 710. The HARQ configuration can be an indication of one or more aspects of a HARQ reporting configuration, such as an indication of one or more CCs on which to transmit HARQ indications, an indication of a mapping between PSSCH occasions and PSFCH occasions, an indication of a message format to use to transmit HARQ-ACK feedback indications, and an indication of a number of bits of HARQ-ACK to report for each PSSCH occasion, among other examples. In some aspects, a base station can transmit the indication of the HARQ configuration to the UE 705 and / or the UE 710.

[0088] As shown by reference 720, the second UE 710 can transmit and the first UE 705 can receive an indication of a HARQ configuration. In some aspects, the first UE 705 and the second UE 710 can negotiate one or more aspects of the HARQ configuration. In some examples, one or more aspects of the HARQ configuration can be provided by another entity, such as a base station.

[0089] As shown by reference 725, 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 the multiple PSSCH communications on multiple sidelink component carriers of the sidelink network with carrier aggregation. As shown by reference 730, 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 transmit the HARQ-ACK feedback indications using a set of resources on a subset of sidelink component carriers of the multiple sidelink component carriers. For example, the set of resources can include a set of PSFCH resources.

[0090] In some aspects, the subset of sidelink component carriers can include multiple sidelink component carriers. For example, four component carriers can be aggregated between two UEs, and two of the component carriers can be used for HARQ-ACK reporting. For example, a first component carrier can be used for HARQ-ACK reporting of PSSCHs received on the first component carrier and a second component carrier, and a third component carrier can be used for HARQ-ACK reporting of PSSCHs received on the third component carrier and a fourth component carrier. In some aspects, the subset of sidelink component carriers can include a single component carrier.

[0091] In some aspects, the subset of sidelink component carriers can include a UE-specific component carrier. A UE-specific component carrier can be a component carrier allocated and / or reserved by a particular UE for HARQ-ACK reporting. For example, in some aspects, two component carriers can be aggregated between a first UE and a second UE. A first component carrier can be used for HARQ-ACK reporting by the first UE, and a second component carrier can be used for HARQ-ACK reporting by the second UE.

[0092] In some aspects, a mapping of PSFCH resources on a single carrier can be defined across carriers between PSSCHs. The UE 705 can transmit the multiple HARQ-ACK feedback indications based at least in part on the mapping. For example, a first HARQ-ACK feedback indication of the multiple HARQ-ACK feedback indications can correspond to a first PSSCH communication of the multiple PSSCH communications (which can be received using a first component carrier), and a second HARQ-ACK feedback indication of the multiple HARQ-ACK feedback indications can correspond to a second PSSCH communication (which can be received using a second component carrier).

[0093] In some aspects, as described below in connection with Figure 8In some aspects, the index of the subchannel can be on each carrier, with a subset of PSFCH reserved for each carrier or across all subchannels. In some aspects, the HARQ-ACK feedback indication can include multiple bits. For example, a HARQ format (format 2) can be used to carry two or more sidelink HARQ-ACK feedback bits. In some aspects, for example, a first HARQ-ACK feedback indication can be transmitted using a first PSFCH format 2 transmission, and a second HARQ-ACK feedback indication can be transmitted using a second PSFCH format 2 transmission.

[0094] In some aspects, a set of resources can be reserved for PSFCH transmissions with format 0 and format 2. The PSFCH resource pool can include a set of slots configured for HARQ-ACK transmissions. In some aspects, the UE 705 can use the set of slots to transmit multiple HARQ-ACK feedback indications. For example, the UE 705 can use a PSFCH format 0 transmission to transmit a first HARQ-ACK feedback indication, and a PSFCH format 2 transmission to transmit a second HARQ-ACK feedback indication. In some aspects, the UE 705 can use a first set of resources of a slot of the set of slots to transmit the first HARQ-ACK feedback indication, and a second set of resources of the slot to transmit the second HARQ-ACK feedback indication.

[0095] In some aspects, a multi-bit HARQ indication can be assigned resources in one or two symbols of some slots. For example, the UE 705 can use less than or equal to two symbols corresponding to a first slot to transmit a first HARQ-ACK feedback indication, and less than or equal to two symbols corresponding to a second slot to transmit a second HARQ-ACK feedback indication. In some aspects, PSFCH transmissions can be supported on different symbols of a slot. For example, the UE 705 can use a first set of symbols corresponding to a slot to transmit a first HARQ-ACK feedback indication, and can use a second set of symbols corresponding to the slot to transmit a second HARQ-ACK feedback indication.

[0096] In some aspects, PSSCH resources can be used to report a multi-bit HARQ-ACK feedback indication. For example, the UE 705 can use a set of PSSCH resources to transmit multiple HARQ-ACK feedback indications. In some aspects, the PSSCH resources can include a dedicated MAC-CE. For example, the dedicated MAC-CE can include a MAC-CE configured to carry multiple HARQ-ACK feedback indications.

[0097] In some aspects, the UE 705 can transmit the multi-bit HARQ-ACK feedback indication using the PSSCH resources by piggybacking the HARQ-ACK feedback indication on a PSSCH communication. In some aspects, “piggybacking” can refer to puncturing the PSSCH communication with the HARQ-ACK feedback indication by replacing one or more bits of the PSSCH communication with one or more bits of the HARQ-ACK feedback indication. In some aspects, “piggybacking” can refer to rate matching the PSSCH communication around the HARQ-ACK feedback indication bits. In this way, the HARQ-ACK feedback indication can be transmitted on the PSSCH.

[0098] In some aspects, the multi-bit HARQ-ACK feedback indication can be transmitted using the PSSCH resources by using a dedicated sidelink control information (SCI) format 2. The SCI format 2 can include a second portion of the sidelink control information message, which can be referred to as SCI-2. In some aspects, the SCI-2 can be transmitted with shared channel data, and in other aspects, the SCI-2 can be transmitted without shared channel data. In some aspects, the multi-bit HARQ-ACK feedback indication can be transmitted by transmitting the indications as part of a dedicated SCI format 1, which can be referred to as SCI-1, using the PSSCH resources. For example, the SCI-1 can be transmitted using the PSCCH.

[0099] In some aspects, the PSSCH resources for reporting the HARQ can be indicated by the base station. In some aspects, for example, the base station can transmit an indication of a set of PSSCH resources to the UE 710 (e.g., a transmitting UE). The base station can also transmit an allocation of reporting resources to the UE 705 for reporting the indication of the set of PSSCH resources. The PSSCH resources for reporting can be the same as the PSSCH resources used for communication, and / or can be from a subset set aside for reporting HARQ-ACK. The UE 710 can transmit the indication of the PSSCH resources to the UE 705 (e.g., a receiving UE) using the reporting resources. In some aspects, the UE 705 can receive the indication of the PSSCH resources from the base station, either directly or through a relay device.

[0100] In some aspects, the UE 705 can select a set of PSSCH resources for reporting. For example, in some aspects, the UE 705 can use sensing measurements to determine channel quality, signal quality, and / or channel congestion, among other examples. The UE 705 can select a set of PSSCH resources based at least in part on such measurements and / or reservation information (e.g., information about resources reserved for other communications). In some aspects, the UE 705 can transmit and the UE 710 can receive an indication of the selected set of PSSCH resources. To reserve the PSSCH resources, a priority can be assigned to the transmission. In some aspects, the priority of the sidelink communication is higher than a priority associated with transmitting multiple HARQ-ACK feedback indications.

[0101] As indicated above, Figure 7 are provided by way of example. Other examples can differ from those described Figure 7 without departing from the spirit of the disclosure.

[0102] Figure 8 is a diagram illustrating an example 800 associated with HARQ feedback resource configuration for sidelink with carrier aggregation, in accordance with various aspects of the present disclosure. As shown Figure 8 , a sidelink environment can include a first component carrier, CC0, and a second component carrier, CC1.

[0103] As shown, as described above, indices of sub-channels can be per carrier, with a subset of PSFCH set aside for each carrier or across all sub-channels. Indexing a sub-channel refers to assigning an index (e.g., an identifier) to a sub-channel that can be used to map resources. In some aspects, for example, four sub-channels in CC0 can be indexed as S1, S2, S3, and S4, respectively, as shown in Figure 8 Corresponding sub-channels in CC1 can be similarly indexed as S1, S2, S3, and S4.

[0104] A sub-channel of one component carrier can correspond to a sub-channel of another component carrier based on its relationship to other sub-channels. For example, CC0 can be divided into four equivalent sub-channels based on a frequency range, and the sub-channels can be indexed from a lowest frequency to a highest frequency (e.g., with reference to a center frequency, a minimum frequency, a maximum frequency, etc.). In some aspects, the indices can span all sub-channels as if they were on the same carrier / pool. For example, a first set of sub-channels can be indexed separately from a second set of sub-channels. In Figure 8 , for example, sub-channels of CC1 can be indexed as S4, S5, S6, and S7, respectively, such that the indices are unique with respect to each other and with respect to all indices associated with CC0.

[0105] In some aspects, as described above, a mapping between PSSCH resources and corresponding PSFCH resources can be defined. As shown, Figure 8 the PSSCH resources can be associated with more than one component carrier, while the PSFCH resources are associated with a single component carrier. In some aspects, a single bit HARQ report can be used for each PSSCH. In some aspects, a multi-bit HARQ report can be used. As shown, the mapping can be defined based at least in part on an index. In some aspects, the number of PSFCH resources can be equal to the number of sub-channels in a given PSFCH period across the carriers. In some aspects, the number of PFSCH resources can be a multiple of the number of sub-channels in a given PSFCH period across the carriers.

[0106] As noted above, Figure 8 are provided as examples. Other examples can differ from what is described with respect to at least one of the described examples. Figure 8

[0107] Figure 9 FIG. 9 is a diagram illustrating an example 900 associated with HARQ feedback resource configuration for sidelink with carrier aggregation, in accordance with various aspects of the present disclosure. As shown, Figure 9 the sidelink environment can include a first component carrier CC0 and a second component carrier CC1. PSFCH resources with format 0 are indicated by “0,” and PSFCH resources with format 2 are indicated by “2.”

[0108] In some aspects, as shown, a single PSFCH configuration per resource pool can be used. The PSFCH configuration can be independent of the format used. For example, as shown, a resource pool configured with PSFCH includes a single set of slots for HARQ transmissions (one slot for HARQ transmissions is shown in Figure 9 the set of slots can include a repeating slot that repeats based on a periodicity established that applies independent of the format.

[0109] As noted above, Figure 9 are provided as examples. Other examples can differ from what is described with respect to at least one of the described examples. Figure 9

[0110] Figure 10 FIG. 10 is a diagram illustrating an example 1000 associated with HARQ feedback resource configuration for sidelink with carrier aggregation, in accordance with various aspects of the present disclosure. As shown, Figure 10 the sidelink environment can include a first component carrier CC0 and a second component carrier CC1. PSFCH resources with format 0 are indicated by “0,” and PSFCH resources with format 2 are indicated by “2.” ​​

[0111] In some aspects, independent PSFCH configurations for each resource pool can be defined based on the format. For example, as shown, a resource pool for format 0 can be configured differently than a resource pool for format 2. The resource pools can have separate, independent slot offsets and / or periodicities. For example, in some aspects, a UE can transmit a first HARQ-ACK feedback indication using a first set of resources of a first subset of slots of a set of slots; and can transmit a second HARQ-ACK feedback indication using a second set of resources of a second subset of slots of the set of slots.

[0112] As indicated above, Figure 10 is provided as an example. Other examples can differ from what is described with respect to at least one of the described examples. Figure 10 As indicated above,

[0113] Figure 11 is a diagram illustrating an example 1100 associated with HARQ feedback resource configuration for sidelink with carrier aggregation, in accordance with various aspects of the present disclosure. As shown, Figure 11 As shown, the sidelink environment can include a component carrier, CC0. PSFCH resources with format 0 are indicated by “0,” and PSFCH resources with format 2 are indicated by “2.”

[0114] As shown, Figure 11 A separate resource pool can be defined for PSFCH resources with format 2. In some aspects, each resource pool can have one of the following configurations: no PSFCH resources, PSFCH resources with format 0 and a specified slot offset and periodicity, or PSFCH resources with format 2 and a specified slot offset and periodicity. In some aspects, for example, a first PSFCH resource pool can correspond to PSFCH format 0 HARQ-ACK transmissions, and a second PSFCH resource pool can correspond to PSFCH format 2 HARQ-ACK transmissions. The first PSFCH resource pool can correspond to at least one of: a first slot offset or a first periodicity, and the second PSFCH resource pool can correspond to at least one of: a second slot offset or a second periodicity. In some aspects, separate sets of slots can be configured for different PSFCH formats. In these slots, more symbols can be allocated to PSFCH than can be allocated in other slots. In some slots, all of the symbols can be allocated to PSFCH.

[0115] As indicated above, Figure 11 is provided as an example. Other examples can differ from what is described with respect to at least one of the described examples. Figure 11 As indicated above,

[0116] Figure 12is a diagram illustrating example 1200 associated with HARQ feedback resource configuration for sidelink with carrier aggregation, in accordance with various aspects of the present disclosure. In Figure 12 In some aspects, PSFCH resources with format 0 are indicated by “0” and PSFCH resources with format 2 are indicated by “2”.

[0117] As described above, PSFCH resources can be overlapping or non-overlapping. As shown by reference number 1210, a PSFCH configuration can include non-overlapping PSFCH resources with different formats. As shown by reference number 1220, a PSFCH configuration can include overlapping PSFCH resources with different formats. Overlapping resources can be resources that can be used to transmit PSFCH communications with either format. In some aspects, when resources overlap and a UE is to transmit a feedback indication with a first format and a feedback indication with a second format, the UE can drop one of the feedback indications. The UE can drop the indication based at least in part on a priority associated with the PSFCH transmission and / or the corresponding PSSCH transmission.

[0118] As indicated above, Figure 12 are provided as examples. Other examples can differ from what is described with respect to at least one of the Figure 12 described examples.

[0119] Figure 13 is a diagram illustrating an example process 1300 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 1300 is an example where the UE (e.g., UE 705) performs operations associated with hybrid automatic repeat request feedback resource configuration for sidelink with carrier aggregation.

[0120] As Figure 13 further shown, in some aspects, process 1300 can include receiving a plurality of PSSCH communications over a plurality of sidelink component carriers of a sidelink network with carrier aggregation (block 1310). For example, the UE (e.g., using reception component 1502 depicted in FIG. 15) can receive a plurality of PSSCH communications over a plurality of sidelink component carriers of a sidelink network with carrier aggregation, as described above. Figure 15

[0121] As Figure 13 further shown, in some aspects, process 1300 can include transmitting a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using the set of resources over a subset of the plurality of sidelink component carriers (block 1320). For example, the UE (e.g., using transmission component 1504 depicted in FIG. 15) can transmit a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications using the set of resources over a subset of the plurality of sidelink component carriers, as described above. Figure 15 ​The depicted transmitting component 1504) can transmit, using a set of resources on a subset of the plurality of sidelink component carriers, a plurality of HARQ-ACK feedback indications corresponding to a plurality of PSSCH communications, as described above.

[0122] Process 1300 can include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0123] In a first aspect, the set of resources includes a set of PSFCH resources.

[0124] In a second aspect, alone or in combination with the first aspect, transmitting the plurality of HARQ-ACK feedback indications includes transmitting the plurality of HARQ-ACK feedback indications based at least in part on a mapping between a set of PSSCH resources associated with the plurality of PSSCH communications and the set of PSFCH resources.

[0125] In a third aspect, alone or in combination with one or more of the first and second aspects, a first HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications corresponds to a first PSSCH communication of the plurality of PSSCH communications, and a second HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications corresponds to a second PSSCH communication of the plurality of PSSCH communications.

[0126] In a fourth aspect, alone or in combination with the third aspect, the first HARQ-ACK feedback indication includes a first single bit, and the second HARQ-ACK feedback indication includes a second single bit.

[0127] In a fifth aspect, alone or in combination with one or more of the third or fourth aspects, receiving the plurality of PSSCH communications includes receiving a first PSSCH communication on a first component carrier of the plurality of sidelink component carriers, and receiving a second PSSCH communication on a second component carrier of the plurality of sidelink component carriers, where the second component carrier is different from the first component carrier.

[0128] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the first set of PSFCH resources is associated with a first component carrier of the plurality of sidelink component carriers, and the second set of PSFCH resources is associated with a second component carrier of the plurality of sidelink component carriers.

[0129] In a seventh aspect, alone or in combination with the sixth aspect, the first set of PSFCH resources is associated with a first set of sub-channels, and the second set of PSFCH resources is associated with a second set of sub-channels.

[0130] In an eighth aspect, alone or in combination with the seventh aspect, the first set of sub-channels corresponds to the second set of sub-channels via a sub-channel index.

[0131] In a ninth aspect, alone or in combination with the seventh aspect, the first set of sub-channels is indexed separately from the second set of sub-channels.

[0132] In a tenth aspect, alone or in combination with one or more of the first or second aspects, a first HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications includes a first plurality of bits and a second HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications includes a second plurality of bits.

[0133] In an eleventh aspect, alone or in combination with the tenth aspect, transmitting the plurality of HARQ-ACK feedback indications includes: transmitting the first HARQ-ACK feedback indication using a first PSFCH format 2 transmission; and transmitting the second HARQ-ACK feedback indication using a second PSFCH format 2 transmission.

[0134] In a twelfth aspect, alone or in combination with the tenth or eleventh aspects, transmitting the plurality of HARQ-ACK feedback indications includes: transmitting the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a first slot; and transmitting the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a second slot.

[0135] In a thirteenth aspect, alone or in combination with one or more of the tenth through twelfth aspects, transmitting the plurality of HARQ-ACK feedback indications includes: transmitting the first HARQ-ACK feedback indication using a first set of symbols corresponding to a slot; and transmitting the first HARQ-ACK feedback indication using a second set of symbols corresponding to the slot.

[0136] In a fourteenth aspect, alone or in combination with the tenth aspect, the PSFCH resource pool includes a set of slots configured for HARQ-ACK transmissions, and transmitting the plurality of HARQ-ACK feedback indications includes: transmitting the first HARQ-ACK feedback indication using a PSFCH format 0 transmission; and transmitting the second HARQ-ACK feedback indication using a PSFCH format 2 transmission.

[0137] In a fifteenth aspect, alone or in combination with the fourteenth aspect, transmitting the multiple HARQ-ACK feedback indications includes transmitting a first HARQ-ACK feedback indication using a first resource set of slots in the set of slots and transmitting a second HARQ-ACK feedback indication using a second resource set of slots.

[0138] In a sixteenth aspect, alone or in combination with the fourteenth aspect, transmitting the multiple HARQ-ACK feedback indications includes transmitting a first HARQ-ACK feedback indication using a first resource set of a first subset of slots of the set of slots and transmitting a second HARQ-ACK feedback indication using a second resource set of a second subset of slots of the set of slots.

[0139] In a seventeenth aspect, alone or in combination with the sixteenth aspect, the first resource set overlaps with the second resource set.

[0140] In an eighteenth aspect, alone or in combination with the tenth aspect, the first PSFCH resource pool corresponds to PSFCH format 0 HARQ-ACK transmissions and the second PSFCH resource pool corresponds to PSFCH format 2 HARQ-ACK transmissions.

[0141] In a nineteenth aspect, alone or in combination with the eighteenth aspect, the first PSFCH resource pool corresponds to at least one of a first slot offset or a first periodicity and the second PSFCH resource pool corresponds to at least one of a second slot offset or a second periodicity.

[0142] In a twentieth aspect, transmitting the multiple HARQ-ACK feedback indications includes transmitting the multiple HARQ-ACK feedback indications using a set of PSSCH resources.

[0143] In a twenty-first aspect, alone or in combination with the twentieth aspect, transmitting the multiple HARQ-ACK feedback indications using the set of PSSCH resources includes reporting the multiple HARQ-ACK feedback indications as dedicated medium access control (MAC) control elements, piggybacking the multiple HARQ-ACK feedback indications on the set of PSSCH resources, reporting the multiple HARQ-ACK feedback indications using a dedicated SCI format 2, or reporting the multiple HARQ-ACK feedback indications using a dedicated SCI format 1.

[0144] In a twenty-second aspect, alone or in combination with the twentieth aspect or the twenty-first aspect, process 1300 includes receiving, from the base station, an indication of the set of PSSCH resources.

[0145] In a twenty-third aspect, alone or in combination with the twenty-second aspect, process 1300 includes receiving an allocation of a reporting resource; and reporting the indication of the set of PSSCH resources to the additional UE using the reporting resource.

[0146] In a twenty-fourth aspect, alone or in combination with the twenty-second aspect or the twenty-third aspect, process 1300 includes receiving, from another UE, an indication of a selection of the set of PSSCH resources.

[0147] In a twenty-fifth aspect, alone or in combination with the twenty-fourth aspect, the set of PSSCH resources includes a set of PSSCH resources reserved for sidelink communications or a set of resources reserved for HARQ-ACK reporting.

[0148] In a twenty-sixth aspect, alone or in combination with the twenty-fifth aspect, a priority of the sidelink communication is higher than a priority associated with transmitting the plurality of HARQ-ACK feedback indications.

[0149] In a twenty-seventh aspect, alone or in combination with one or more of the first aspect through the twenty-sixth aspect, the subset of sidelink component carriers includes a single sidelink component carrier.

[0150] In a twenty-eighth aspect, alone or in combination with one or more of the first aspect through the twenty-seventh aspect, the subset of sidelink component carriers includes one or more UE-specific sidelink component carriers.

[0151] Although Figure 13 Example blocks of process 1300 are illustrated, but in some aspects, process 1300 can include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in FIG. 13. Additionally, or alternatively, two or more of the blocks of process 1300 can be performed concurrently. Figure 13 In a twenty-seventh aspect, alone or in combination with one or more of the first aspect through the twenty-sixth aspect, the subset of sidelink component carriers includes a single sidelink component carrier.

[0152] Figure 14 FIG. 14 is a diagram illustrating an example process 1400 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 1400 is an example where a UE (e.g., UE 710) performs operations associated with hybrid automatic repeat request feedback resource configuration for sidelink with carrier aggregation.

[0153] As Figure 14 shown, in some aspects, process 1400 can include transmitting a plurality of PSSCH communications over a plurality of sidelink component carriers of a sidelink network with carrier aggregation (block 1410). For example, the UE (e.g., using communication component 820, transmission component 830, reception component 840, communication management component 850, and / or one or more other components of the UE 710) can transmit a plurality of PSSCH communications over a plurality of sidelink component carriers of a sidelink network with carrier aggregation, as described herein. Figure 15The transmission component 1504, depicted in FIG. 15, can transmit the plurality of PSSCH communications on a plurality of sidelink component carriers of the sidelink network with carrier aggregation, as described above.

[0154] As further shown, in some aspects, process 1400 can include receiving, using a set of resources, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications on a subset of sidelink component carriers of the plurality of sidelink component carriers (block 1420). For example, the UE (e.g., using reception component 1402, depicted in FIG. 14) can receive, using a set of resources, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications on a subset of sidelink component carriers of the plurality of sidelink component carriers, as described above. Figure 14 As further shown, in some aspects, process 1400 can include receiving, using a set of resources, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications on a subset of sidelink component carriers of the plurality of sidelink component carriers (block 1420). For example, the UE (e.g., using reception component 1402, depicted in FIG. 14) can receive, using a set of resources, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications on a subset of sidelink component carriers of the plurality of sidelink component carriers, as described above. Figure 15

[0155] Process 1400 can include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0156] In a first aspect, the set of resources includes a set of PSFCH resources.

[0157] In a second aspect, alone or in combination with the first aspect, receiving the plurality of HARQ-ACK feedback indications includes receiving the plurality of HARQ-ACK feedback indications based at least in part on a mapping between a set of PSSCH resources associated with the plurality of PSSCH communications and the set of PSFCH resources.

[0158] In a third aspect, alone or in combination with one or more of the first and second aspects, a first HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications corresponds to a first PSSCH communication of the plurality of PSSCH communications, and a second HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications corresponds to a second PSSCH communication of the plurality of PSSCH communications.

[0159] In a fourth aspect, alone or in combination with the third aspect, the first HARQ-ACK feedback indication includes a first single bit, and the second HARQ-ACK feedback indication includes a second single bit.

[0160] In a fifth aspect, alone or in combination with one or more of the third or fourth aspects, transmitting the plurality of PSSCH communications includes transmitting a first PSSCH communication on a first component carrier of the plurality of sidelink component carriers, and transmitting a second PSSCH communication on a second component carrier of the plurality of sidelink component carriers, where the second component carrier is different from the first component carrier. ​

[0161] In a sixth aspect, alone or in combination with the fifth aspect, the first set of PSFCH resources is associated with a first component carrier of the plurality of component carriers, and the second set of PSFCH resources is associated with a second component carrier of the plurality of component carriers.

[0162] In a seventh aspect, alone or in combination with the sixth aspect, the first set of PSFCH resources is associated with a first set of sub-channels, and the second set of PSFCH resources is associated with a second set of sub-channels.

[0163] In an eighth aspect, alone or in combination with the sixth aspect, the first set of sub-channels corresponds to the second set of sub-channels via a sub-channel index.

[0164] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the first set of sub-channels is indexed separately from the second set of sub-channels.

[0165] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, a first HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications includes a first plurality of bits, and a second HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications includes a second plurality of bits.

[0166] In an eleventh aspect, alone or in combination with the tenth aspect, receiving the plurality of HARQ-ACK feedback indications includes: receiving the first HARQ-ACK feedback indication using a first PSFCH format 2 transmission; and receiving the second HARQ-ACK feedback indication using a second PSFCH format 2 transmission.

[0167] In a twelfth aspect, alone or in combination with one or more of the tenth or eleventh aspects, receiving the plurality of HARQ-ACK feedback indications includes: receiving the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a first slot; and receiving the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a second slot.

[0168] In a thirteenth aspect, alone or in combination with one or more of the tenth through twelfth aspects, receiving the plurality of HARQ-ACK feedback indications includes: receiving the first HARQ-ACK feedback indication using a first set of symbols corresponding to a slot; and receiving the first HARQ-ACK feedback indication using a second set of symbols corresponding to the slot.

[0169] In a fourteenth aspect, alone or in combination with the thirteenth aspect, the PSFCH resource pool includes a set of slots configured for HARQ-ACK transmissions, and receiving the plurality of HARQ-ACK feedback indications includes: receiving a first HARQ-ACK feedback indication using a PSFCH format 0 transmission; and receiving a second HARQ-ACK feedback indication using a PSFCH format 2 transmission.

[0170] In a fifteenth aspect, alone or in combination with the fourteenth aspect, receiving the plurality of HARQ-ACK feedback indications includes: receiving a first HARQ-ACK feedback indication using a first set of resources of a slot of the set of slots; and receiving a second HARQ-ACK feedback indication using a second set of resources of the slot.

[0171] In a sixteenth aspect, alone or in combination with the fourteenth aspect, receiving the plurality of HARQ-ACK feedback indications includes: receiving a first HARQ-ACK feedback indication using a first set of resources of a first subset of slots of the set of slots; and receiving a second HARQ-ACK feedback indication using a second set of resources of a second subset of slots of the set of slots.

[0172] In a seventeenth aspect, alone or in combination with the sixteenth aspect, the first set of resources overlaps with the second set of resources.

[0173] In an eighteenth aspect, alone or in combination with the tenth aspect, the first PSFCH resource pool corresponds to PSFCH format 0 HARQ-ACK transmissions, and the second PSFCH resource pool corresponds to PSFCH format 2 HARQ-ACK transmissions.

[0174] In a nineteenth aspect, alone or in combination with the eighteenth aspect, the first PSFCH resource pool corresponds to at least one of a first slot offset or a first periodicity, and the second PSFCH resource pool corresponds to at least one of a second slot offset or a second periodicity.

[0175] In a twentieth aspect, receiving the plurality of HARQ-ACK feedback indications includes: receiving the plurality of HARQ-ACK feedback indications using a set of PSSCH resources.

[0176] In aspect 21, receiving multiple HARQ-ACK feedback indications using a PSSCH resource set, either alone or in combination with aspect 20, includes: receiving the multiple HARQ-ACK feedback indications as a dedicated media access control (MAC) control element; receiving a PSSCH resource set, wherein the multiple HARQ-ACK feedback indications are carried on the PSSCH resource set; receiving the multiple HARQ-ACK feedback indications using dedicated side link control information (SCI) format 2; or receiving the multiple HARQ-ACK feedback indications using dedicated SCI format 1.

[0177] In the twenty-second aspect, alone or in combination with one or more aspects of the twentieth or twenty-first aspect, process 1400 includes: receiving an indication of a PSSCH resource set from a base station.

[0178] In the twenty-third aspect, alone or in combination with one or more aspects of the twentieth or twenty-first aspect, process 1400 includes: receiving an indication of a PSSCH resource set from an additional UE.

[0179] In aspect 24, either alone or in combination with aspect 23, the PSSCH resource set includes a PSSCH resource set reserved for sidelink communication or a resource set reserved for HARQ-ACK reporting.

[0180] In aspect 25, either alone or in combination with aspect 24, sidelink communication has a higher priority than the priority associated with sending multiple HARQ-ACK feedback indications.

[0181] In the twenty-sixth aspect, either alone or in combination with one or more aspects from the first to the twenty-fifth aspects, the lateral link component carrier subset includes a single lateral link component carrier.

[0182] In the twenty-seventh aspect, either alone or in combination with one or more of the first to twenty-sixth aspects, the lateral link component carrier subset includes one or more UE-specific lateral link component carriers.

[0183] Although Figure 14 An example box of process 1400 is shown, but in some aspects, process 1400 may include... Figure 14 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 1400 may be executed in parallel.

[0184] Figure 15is a block diagram of an example apparatus 1500 for wireless communication. The apparatus 1500 can be a UE, or a UE can include the apparatus 1500. In some aspects, the apparatus 1500 includes a reception component 1502 and a transmission component 1504, which can be in communication with one another (for example, via one or more buses and / or one or more other components). As shown, the apparatus 1500 can communicate with another apparatus 1506 (such as a UE, a base station, or another wireless communication device) using the reception component 1502 and the transmission component 1504. As further shown, the apparatus 1500 can include a HARQ component 1508, which is configured to generate, interpret, and / or otherwise manage HARQ-ACK feedback indications.

[0185] In some aspects, the apparatus 1500 can be configured to perform one or more operations described herein with reference to Figures 6-12 In some aspects, the apparatus 1500 can be configured to perform one or more operations described herein with reference to Figure 13 In some aspects, the apparatus 1500 can be configured to perform one or more operations described herein with reference to Figure 14 In some aspects, the apparatus 1500 and / or one or more components shown in Figure 15 may include one or more components of the UE described above in connection with Figure 2 In some aspects, one or more components shown in Figure 15 may be implemented within one or more components of the UE described above in connection with Figure 2 In some aspects, one or more components of the set of components can be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) can be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

[0186] The reception component 1502 can receive communications, such as reference signals, control information, data communications, or combinations thereof, from the apparatus 1506. The reception component 1502 can provide received communications to one or more other components of the apparatus 1500. In some aspects, the reception component 1502 can perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and can provide the processed signals to the one or more other components of the apparatus 1506. In some aspects, the reception component 1502 can include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or combinations thereof, of the UE described above in connection with Figure 2

[0187] ​The transmission component 1504 can transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1506. In some aspects, one or more other components of the apparatus 1506 can generate communications and can provide the generated communications to the transmission component 1504 for transmission to the apparatus 1506. In some aspects, the transmission component 1506 can perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and can transmit the processed signals to the apparatus 1506. In some aspects, the transmission component 1504 can include one or more antennas, modulators, transmit MIMO processors, transmit processors, controller / processors, memories, or combinations thereof, of the apparatus 1506, as described above. Figure 2 The transmission component 1504 can transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1506. In some aspects, one or more other components of the apparatus 1506 can generate communications and can provide the generated communications to the transmission component 1504 for transmission to the apparatus 1506. In some aspects, the transmission component 1506 can perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and can transmit the processed signals to the apparatus 1506. In some aspects, the transmission component 1504 can include one or more antennas, modulators, transmit MIMO processors, transmit processors, controller / processors, memories, or combinations thereof, of the apparatus 1506, as described above.

[0188] The reception component 1502 can receive a plurality of PSSCH communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation. The transmission component 1504 can transmit, using a set of resources on a subset of the plurality of sidelink component carriers, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications. The reception component 1502 can receive, from a base station, an indication of the set of PSSCH resources. The reception component 1502 can receive an allocation of a reporting resource. The transmission component 1504 can report, using the reporting resource, the indication of the set of PSSCH resources to an additional UE. The reception component 1502 can receive, from another UE, an indication of a selection of the set of PSSCH resources.

[0189] The transmission component 1504 can transmit a plurality of PSSCH communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation. The reception component 1502 can receive, using a set of resources on a subset of the plurality of sidelink component carriers, a plurality of HARQ-ACK feedback indications corresponding to the plurality of PSSCH communications. The reception component 1502 can receive, from a base station, an indication of the set of PSSCH resources. The reception component 1502 can receive, from an additional UE, an indication of the set of PSSCH resources.

[0190] Figure 15 The number and arrangement of components shown in FIG. 10 are provided as an example. In practice, there can be additional components, fewer components, different components, or differently arranged components than those shown in FIG. 10. Additionally or alternatively, the components shown in FIG. 10 can be implemented as part of a system, such as the system 1000 of FIG. 10. Figure 15 Components shown in FIG. 10 can interface with one or more other components Figure 15 Two or more components shown in FIG. 10 can be implemented within a single component, or a single component shown in FIG. 10 can be implemented as multiple, distributed components. Additionally or alternatively, a single component shown in FIG. 10 can be implemented as multiple components. Figure 15 Two or more components shown in FIG. 10 can be implemented within a single component, or a single component shown in FIG. 10 can be implemented as multiple, distributed components. Additionally or alternatively, a single component shown in FIG. 10 can be implemented as multiple components. Figure 15The illustrated set of one or more components can perform one or more functions described as being performed by Figure 15 The illustrated set of one or more components performs one or more functions described as being performed by

[0191] The following provides an overview of aspects of the disclosure:

[0192] Aspect 1 : A method of wireless communication performed by a user equipment (UE), comprising: receiving a plurality of physical sidelink shared channel (PSSCH) communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and transmitting, using a set of resources, a plurality of hybrid automatic repeat request-acknowledgment (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications on a subset of sidelink component carriers of the plurality of sidelink component carriers.

[0193] Aspect 2: The method of aspect 1, wherein the set of resources comprises a set of physical sidelink feedback channel (PSFCH) resources.

[0194] Aspect 3: The method of aspect 2, wherein transmitting the plurality of HARQ-ACK feedback indications comprises transmitting the plurality of HARQ-ACK feedback indications based at least in part on a mapping between a set of PSSCH resources associated with the plurality of PSSCH communications and the set of PSFCH resources.

[0195] Aspect 4: The method of any of aspects 1-3, wherein a first HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications corresponds to a first PSSCH communication of the plurality of PSSCH communications, and wherein a second HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications corresponds to a second PSSCH communication of the plurality of PSSCH communications.

[0196] Aspect 5: The method of aspect 4, wherein the first HARQ-ACK feedback indication comprises a first single bit, and wherein the second HARQ-ACK feedback indication comprises a second single bit.

[0197] Aspect 6: The method of any of aspects 4 or 5, wherein receiving the plurality of PSSCH communications comprises: receiving the first PSSCH communication on a first component carrier of the plurality of sidelink component carriers; and receiving the second PSSCH communication on a second component carrier of the plurality of sidelink component carriers, wherein the second component carrier is different from the first component carrier.

[0198] Aspect 7: The method of any one of aspects 1-6, wherein a first set of PSFCH resources is associated with a first component carrier of the plurality of component carriers, and wherein a second set of PSFCH resources is associated with a second component carrier of the plurality of component carriers.

[0199] Aspect 8: The method of aspect 7, wherein the first set of PSFCH resources is associated with a first set of sub-channels, and wherein the second set of PSFCH resources is associated with a second set of sub-channels.

[0200] Aspect 9: The method of aspect 8, wherein the first set of sub-channels corresponds to the second set of sub-channels via a sub-channel index.

[0201] Aspect 10: The method of aspect 8, wherein the first set of sub-channels is indexed separately from the second set of sub-channels.

[0202] Aspect 11: The method of any one of aspects 1-3, wherein a first HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications comprises a first plurality of bits, and wherein a second HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications comprises a second plurality of bits.

[0203] Aspect 12: The method of aspect 11, wherein transmitting the plurality of HARQ-ACK feedback indications comprises: transmitting the first HARQ-ACK feedback indication using a first PSFCH format 2 transmission; and transmitting the second HARQ-ACK feedback indication using a second PSFCH format 2 transmission.

[0204] Aspect 13: The method of any one of aspects 11 or 12, wherein transmitting the plurality of HARQ-ACK feedback indications comprises: transmitting the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a first slot; and transmitting the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a second slot.

[0205] Aspect 14: The method of any one of aspects 11-13, wherein transmitting the plurality of HARQ-ACK feedback indications comprises: transmitting the first HARQ-ACK feedback indication using a first set of symbols corresponding to a slot; and transmitting the first HARQ-ACK feedback indication using a second set of symbols corresponding to the slot.

[0206] Aspect 15: The method of aspect 11, wherein the PSFCH resource pool comprises a set of slots configured for HARQ-ACK transmissions, and wherein transmitting the plurality of HARQ-ACK feedback indications comprises: transmitting the first HARQ-ACK feedback indication using a PSFCH format 0 transmission; and transmitting the second HARQ-ACK feedback indication using a PSFCH format 2 transmission.

[0207] Aspect 16: The method of aspect 15, wherein transmitting the plurality of HARQ-ACK feedback indications comprises: transmitting the first HARQ-ACK feedback indication using a first set of resources of a slot of the set of slots; and transmitting the second HARQ-ACK feedback indication using a second set of resources of the slot.

[0208] Aspect 17: The method of aspect 15, wherein transmitting the plurality of HARQ-ACK feedback indications comprises: transmitting the first HARQ-ACK feedback indication using a first set of resources of a first subset of slots of the set of slots; and transmitting the second HARQ-ACK feedback indication using a second set of resources of a second subset of slots of the set of slots.

[0209] Aspect 18: The method of aspect 17, wherein the first set of resources overlaps with the second set of resources.

[0210] Aspect 19: The method of aspect 11, wherein a first PSFCH resource pool corresponds to PSFCH format 0 HARQ-ACK transmissions, and wherein a second PSFCH resource pool corresponds to PSFCH format 2 HARQ-ACK transmissions.

[0211] Aspect 20: The method of aspect 19, wherein the first PSFCH resource pool corresponds to at least one of: a first slot offset, or a first periodicity, and wherein the second PSFCH resource pool corresponds to at least one of: a second slot offset, or a second periodicity.

[0212] Aspect 21: The method of aspect 1, wherein transmitting the plurality of HARQ-ACK feedback indications comprises: transmitting the plurality of HARQ-ACK feedback indications using a set of PSSCH resources.

[0213] Aspect 22: The method of aspect 21, wherein transmitting the plurality of HARQ-ACK feedback indications using the set of PSSCH resources comprises reporting the plurality of HARQ-ACK feedback indications as dedicated medium access control (MAC) control elements, piggybacking the plurality of HARQ-ACK feedback indications on the set of PSSCH resources, reporting the plurality of HARQ-ACK feedback indications using a dedicated sidelink control information (SCI) format 2, or reporting the plurality of HARQ-ACK feedback indications using a dedicated SCI format 1.

[0214] Aspect 23: The method of any one of aspects 21 or 22, further comprising: receiving an indication of the set of PSSCH resources from a base station.

[0215] Aspect 24: The method of aspect 23, further comprising: receiving an allocation of a reporting resource; and reporting the indication of the set of PSSCH resources to an additional UE using the reporting resource.

[0216] Aspect 25: The method of any one of aspects 21 or 22, further comprising: receiving an indication of a selection of the set of PSSCH resources from another UE.

[0217] Aspect 26: The method of aspect 25, wherein the set of PSSCH resources comprises a set of PSSCH resources reserved for the sidelink communication or a set of resources reserved for HARQ-ACK reporting.

[0218] Aspect 27: The method of aspect 26, wherein a priority of the sidelink communication is higher than a priority associated with transmitting the plurality of HARQ-ACK feedback indications.

[0219] Aspect 28: The method of any one of aspects 1-27, wherein the subset of sidelink component carriers comprises a single sidelink component carrier.

[0220] Aspect 29: The method of any one of aspects 1-28, wherein the subset of sidelink component carriers comprises one or more UE-specific sidelink component carriers.

[0221] Aspect 30: A method of wireless communication performed by a user equipment (UE), comprising: transmitting a plurality of physical sidelink shared channel (PSSCH) communications on a plurality of sidelink component carriers of a sidelink network with carrier aggregation; and receiving, on a subset of sidelink component carriers of the plurality of sidelink component carriers, a plurality of hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback indications corresponding to the plurality of PSSCH communications using a set of resources.

[0222] Aspect 31 : The method of aspect 30, wherein the set of resources comprises a set of physical sidelink feedback channel (PSFCH) resources.

[0223] Aspect 32: The method of aspect 31, wherein receiving the plurality of HARQ-ACK feedback indications comprises receiving the plurality of HARQ-ACK feedback indications based at least in part on a mapping between a set of PSSCH resources associated with the plurality of PSSCH communications and the set of PSFCH resources.

[0224] Aspect 33: The method of any of aspects 30-32, wherein a first HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications corresponds to a first PSSCH communication of the plurality of PSSCH communications, and wherein a second HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications corresponds to a second PSSCH communication of the plurality of PSSCH communications.

[0225] Aspect 34: The method of aspect 33, wherein the first HARQ-ACK feedback indication comprises a first single bit, and wherein the second HARQ-ACK feedback indication comprises a second single bit.

[0226] Aspect 35: The method of any of aspects 33 or 34, wherein transmitting the plurality of PSSCH communications comprises transmitting the first PSSCH communication on a first component carrier of the plurality of component carriers; and transmitting the second PSSCH communication on a second component carrier of the plurality of component carriers, wherein the second component carrier is different from the first component carrier.

[0227] Aspect 36: The method of any of aspects 30-35, wherein a first set of PSFCH resources is associated with a first component carrier of the plurality of component carriers, and wherein a second set of PSFCH resources is associated with a second component carrier of the plurality of component carriers.

[0228] Aspect 37: The method of aspect 36, wherein the first set of PSFCH resources is associated with a first set of sub-channels, and wherein the second set of PSFCH resources is associated with a second set of sub-channels.

[0229] Aspect 38: The method of aspect 37, wherein the first set of sub-channels corresponds to the second set of sub-channels via a sub-channel index.

[0230] Aspect 39: The method of aspect 37, wherein the first set of sub-channels is indexed separately from the second set of sub-channels.

[0231] Aspect 40: The method of any of aspects 30-32, wherein a first HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications comprises a first plurality of bits, and wherein a second HARQ-ACK feedback indication of the plurality of HARQ-ACK feedback indications comprises a second plurality of bits.

[0232] Aspect 41: The method of aspect 40, wherein receiving the plurality of HARQ-ACK feedback indications comprises: receiving the first HARQ-ACK feedback indication using a first PSFCH format 2 transmission; and receiving the second HARQ-ACK feedback indication using a second PSFCH format 2 transmission.

[0233] Aspect 42: The method of any of aspects 40 or 41, wherein receiving the plurality of HARQ-ACK feedback indications comprises: receiving the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a first slot; and receiving the first HARQ-ACK feedback indication using less than or equal to two symbols corresponding to a second slot.

[0234] Aspect 43: The method of any of aspects 40-42, wherein receiving the plurality of HARQ-ACK feedback indications comprises: receiving the first HARQ-ACK feedback indication using a first set of symbols corresponding to a slot; and receiving the first HARQ-ACK feedback indication using a second set of symbols corresponding to the slot.

[0235] Aspect 44: The method of aspect 40, wherein a PSFCH resource pool comprises a set of slots configured for HARQ-ACK transmissions, and wherein receiving the plurality of HARQ-ACK feedback indications comprises: receiving the first HARQ-ACK feedback indication using a PSFCH format 0 transmission; and receiving the second HARQ-ACK feedback indication using a PSFCH format 2 transmission.

[0236] Aspect 45: The method of aspect 44, wherein receiving the plurality of HARQ-ACK feedback indications comprises: receiving the first HARQ-ACK feedback indication using a first set of resources of a slot of the set of slots; and receiving the second HARQ-ACK feedback indication using a second set of resources of the slot.

[0237] Aspect 46: The method of Aspect 44, wherein receiving the plurality of HARQ-ACK feedback indications comprises: receiving the first HARQ-ACK feedback indication using a first set of resources of a first subset of slots of the set of slots; and receiving the second HARQ-ACK feedback indication using a second set of resources of a second subset of slots of the set of slots.

[0238] Aspect 47: The method of Aspect 46, wherein the first set of resources overlaps with the second set of resources.

[0239] Aspect 48: The method of Aspect 40, wherein a first PSFCH resource pool corresponds to PSFCH format 0 HARQ-ACK transmissions, and wherein a second PSFCH resource pool corresponds to PSFCH format 2 HARQ-ACK transmissions.

[0240] Aspect 49: The method of Aspect 48, wherein the first PSFCH resource pool corresponds to at least one of: a first slot offset, or a first periodicity, and wherein the second PSFCH resource pool corresponds to at least one of: a second slot offset, or a second periodicity.

[0241] Aspect 50: The method of Aspect 30, wherein receiving the plurality of HARQ-ACK feedback indications comprises: receiving the plurality of HARQ-ACK feedback indications using a set of PSSCH resources.

[0242] Aspect 51: The method of Aspect 50, wherein receiving the plurality of HARQ-ACK feedback indications using the set of PSSCH resources comprises: receiving the plurality of HARQ-ACK feedback indications as dedicated medium access control (MAC) control elements; receiving the set of PSSCH resources with the plurality of HARQ-ACK feedback indications piggybacked on the set of PSSCH resources; receiving the plurality of HARQ-ACK feedback indications using a dedicated sidelink control information (SCI) format 2; or receiving the plurality of HARQ-ACK feedback indications using a dedicated SCI format 1.

[0243] Aspect 52: The method of any of Aspect 50 or 51, further comprising: receiving an indication of the set of PSSCH resources from a base station.

[0244] Aspect 53: The method of any of Aspect 50 or 51, further comprising: receiving an indication of the set of PSSCH resources from an additional UE.

[0245] Aspect 54: The method of aspect 52, wherein the set of PSSCH resources comprises a set of PSSCH resources reserved for the sidelink communication or a set of resources reserved for HARQ-ACK reporting.

[0246] Aspect 55: The method of aspect 54, wherein a priority of the sidelink communication is higher than a priority associated with transmitting the plurality of HARQ-ACK feedback indications.

[0247] Aspect 56: The method of any of aspects 30-55, wherein the subset of sidelink component carriers comprises a single sidelink component carrier.

[0248] Aspect 57: The method of any of aspects 30-56, wherein the subset of sidelink component carriers comprises one or more UE-specific sidelink component carriers.

[0249] Aspect 58: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more aspects of aspects 1-29.

[0250] Aspect 59: 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 configured to perform the method of one or more aspects of aspects 1-29.

[0251] Aspect 60: An apparatus for wireless communication, comprising at least one means for performing the method of one or more aspects of aspects 1-29.

[0252] Aspect 61: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-29.

[0253] Aspect 62: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 1-29.

[0254] Aspect 63: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of Aspects 30-57.

[0255] Aspect 64: 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 configured to perform the method of one or more of Aspects 30-57.

[0256] Aspect 65: An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 30-57.

[0257] Aspect 66: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 30-57.

[0258] Aspect 67: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 30-57.

[0259] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations can be possible in light of the above disclosure or can be acquired from practice of the aspects.

[0260] As used herein, the term “component” is intended to be broadly interpreted to include hardware and / or a combination of hardware and software. “Software” shall be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a processor is implemented in hardware and / or a combination of hardware and software. It will be apparent that systems and / or methods described herein can be implemented in different forms of hardware and / or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and / or methods were described herein without reference to specific software code — it being understood that software and hardware can be designed to implement the systems and / or methods based, at least in part, on the description herein.

[0261] As used herein, depending on the context, satisfying a threshold can refer to a value being 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, and / or the like.

[0262] Even if a particular combination is not recited in the claims and / or disclosed in the specification, the combination is deemed to be within the scope of the present aspects. Indeed, many combinations of features that are not recited in the claims and / or disclosed in the specification are deemed to be within the scope of the present aspects. Although each dependent claim listed below can only directly depend on one claim, the disclosure of each dependent claim is deemed to be combined with the disclosure of each other dependent claim. As used herein, a phrase referring to “at least one of’ a list of items refers to any combination of those items, including single members. As an example, “at least one of a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination of multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

[0263] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items, and can be used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items, and can be used interchangeably with “the one or more.” Also, as used herein, the terms “set” and “group” are intended to include one or more items (for example, related items, unrelated items, or a combination of related and unrelated items), and can be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series of items (for example, “a, b, or c” or “a, b, and c”) unless explicitly stated otherwise (for example, if used in the context of “either a, b, or c, but not both”).

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 Link Shared Channel (PSSCH) communications on multiple side link component carriers in a side link network with side link carrier aggregation; and Based at least in part on the mapping between the PSSCH resource set associated with the plurality of PSSCH communications and the Physical Side Link Feedback Channel (PSFCH) resource set, the PSFCH resource set on a single side link component carrier among the plurality of side link component carriers is used and one or more format types are used to send a plurality of Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) feedback indications, and wherein the PSFCH resource set on the single side link component carrier includes: a first PSFCH resource pool corresponding to a first format type among the one or more format types for a first HARQ-ACK transmission, and a second PSFCH resource pool corresponding to a second format type among the one or more format types for a second HARQ-ACK transmission.

2. The UE of claim 1, wherein, The first HARQ-ACK feedback indication among the plurality of HARQ-ACK feedback indications corresponds to the first PSSCH communication among the plurality of PSSCH communications, and Wherein, the second HARQ-ACK feedback indication among the plurality of HARQ-ACK feedback indications corresponds to the second PSSCH communication among the plurality of PSSCH communications, wherein, when receiving the plurality of PSSCH communications, the one or more processors are configured to: The first PSSCH communication is received on the first component carrier of the plurality of side-link component carriers; and The second PSSCH communication is received on the second component carrier among the plurality of side link component carriers, wherein the second component carrier is different from the first component carrier.

3. The UE of claim 1, wherein, The first PSFCH resource set is associated with the first component carrier among the plurality of sidelink component carriers, and The second PSFCH resource set is associated with the second component carrier among the plurality of side-link component carriers.

4. The UE of claim 3, wherein, The first PSFCH resource set is associated with the first sub-channel set, and The second PSFCH resource set is associated with the second sub-channel set.

5. The UE according to claim 1, wherein, When sending the plurality of HARQ-ACK feedback indications, the one or more processors are configured to: The first HARQ-ACK feedback indication is sent using the second format type from the one or more format types, wherein the second format type includes a first PSFCH format 2 transmission; and The second HARQ-ACK feedback indication is sent using the second PSFCH format 2 transmission.

6. The UE according to claim 5, wherein, When sending the plurality of HARQ-ACK feedback indications, the one or more processors are configured to: The first HARQ-ACK feedback indication is sent using two symbols less than or equal to those corresponding to the first time slot; and The first HARQ-ACK feedback indication is sent using two symbols less than or equal to those corresponding to the second time slot.

7. The UE according to claim 5, wherein, When sending the plurality of HARQ-ACK feedback indications, the one or more processors are configured to: The first HARQ-ACK feedback indication is sent using the first symbol set corresponding to the time slot; and The first HARQ-ACK feedback indication is sent using a second set of symbols corresponding to the time slot.

8. The UE according to claim 5, wherein, The PSFCH resource pool includes a set of time slots configured for HARQ-ACK transmission, wherein sending the plurality of HARQ-ACK feedback indications includes: The first HARQ-ACK feedback indication is sent using the first format type from one or more of the aforementioned format types, wherein the first format type includes PSFCH format 0 transmission; and The second HARQ-ACK feedback indication is sent using the second format type from one or more of the format types, wherein the second format type includes PSFCH format 2 transmission.

9. The UE according to claim 8, wherein, When sending the plurality of HARQ-ACK feedback indications, the one or more processors are configured to: The first resource set of time slots in the time slot set is used to send the first HARQ-ACK feedback indication; and The second resource set of the time slot is used to send the second HARQ-ACK feedback indication.

10. The UE according to claim 9, wherein, When sending the plurality of HARQ-ACK feedback indications, the one or more processors are configured to: The first HARQ-ACK feedback indication is sent using a first resource set of a first subset of the time slot set; and The second HARQ-ACK feedback indication is sent using the second resource set of the second time slot subset of the time slot set.

11. The UE according to claim 5, wherein, The first format type includes a PSFCH format 0HARQ-ACK transmission with at least one of a first time slot offset or a first period, and wherein the second format type includes a PSFCH format 2HARQ-ACK transmission with at least one of a second time slot offset or a second period.

12. The UE according to claim 1, wherein, When sending the plurality of HARQ-ACK feedback indications, the one or more processors are configured to: use a PSSCH resource set to send the plurality of HARQ-ACK feedback indications, and wherein, when using the PSSCH resource set to send the plurality of HARQ-ACK feedback indications, the one or more processors are configured to: The multiple HARQ-ACK feedback indications are reported as dedicated media access control (MAC) control elements; The multiple HARQ-ACK feedback indicators are mounted on the PSSCH resource set; The multiple HARQ-ACK feedback indications are reported using Dedicated Side Link Control Information (SCI) Format 2; or The multiple HARQ-ACK feedback indications are reported using the dedicated SCI format 1.

13. The UE according to claim 12, wherein, The one or more processors are further configured to: Receive an indication of the PSSCH resource set from the base station; Receive allocation of reporting resources; and Use the reporting resources to report the indications for the PSSCH resource set to additional UEs.

14. The UE according to claim 13, wherein, The one or more processors are further configured to: receive from another UE an indication of selection of the PSSCH resource set, wherein the PSSCH resource set includes a PSSCH resource set reserved for the plurality of PSSCH communications or a resource set reserved for HARQ-ACK reports.

15. The UE according to claim 1, wherein, The single sidelink component carrier includes UE-specific sidelink component carriers.

16. The UE according to claim 1, wherein, The mapping is based, at least in part, on an index of the set of subchannels associated with the plurality of sidelink component carriers.

17. A method for wireless communication performed by a user equipment (UE), comprising: Receive multiple physical sidelink shared channel (PSSCH) communications on multiple sidelink component carriers in a sidelink network with sidelink carrier aggregation; as well as Based at least in part on the mapping between the PSSCH resource set associated with the plurality of PSSCH communications and the Physical Side Link Feedback Channel (PSFCH) resource set, the PSFCH resource set on a single side link component carrier among the plurality of side link component carriers is used and one or more format types are used to send a plurality of Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) feedback indications, and wherein the PSFCH resource set on the single side link component carrier includes: a first PSFCH resource pool corresponding to a first format type among the one or more format types for a first HARQ-ACK transmission, and a second PSFCH resource pool corresponding to a second format type among the one or more format types for a second HARQ-ACK transmission.

18. The method according to claim 17, wherein, The first HARQ-ACK feedback indication among the plurality of HARQ-ACK feedback indications corresponds to the first PSSCH communication among the plurality of PSSCH communications, and Wherein, the second HARQ-ACK feedback indication among the plurality of HARQ-ACK feedback indications corresponds to the second PSSCH communication among the plurality of PSSCH communications, wherein receiving the plurality of PSSCH communications includes: The first PSSCH communication is received on the first component carrier of the plurality of side-link component carriers; and The second PSSCH communication is received on the second component carrier among the plurality of side link component carriers, wherein the second component carrier is different from the first component carrier.

19. The method of claim 17, wherein, The first PSFCH resource set is associated with the first component carrier among the plurality of sidelink component carriers, and The second PSFCH resource set is associated with the second component carrier among the plurality of side-link component carriers.

20. The method according to claim 19, wherein, The first PSFCH resource set is associated with the first sub-channel set, and The second PSFCH resource set is associated with the second sub-channel set.

21. The method according to claim 17, wherein, Sending the multiple HARQ-ACK feedback indications includes: The first HARQ-ACK feedback indication is sent using the second format type from the one or more format types, wherein the second format type includes a first PSFCH format 2 transmission; and The second HARQ-ACK feedback indication is sent using the second PSFCH format 2 transmission.

22. The method according to claim 21, wherein, Sending the multiple HARQ-ACK feedback indications includes: The first HARQ-ACK feedback indication is sent using two symbols less than or equal to those corresponding to the first time slot; and The first HARQ-ACK feedback indication is sent using two symbols less than or equal to those corresponding to the second time slot.

23. The method according to claim 21, wherein, Sending the multiple HARQ-ACK feedback indications includes: The first HARQ-ACK feedback indication is sent using the first symbol set corresponding to the time slot; and The first HARQ-ACK feedback indication is sent using a second set of symbols corresponding to the time slot.

24. The method according to claim 21, wherein, The PSFCH resource pool includes a set of time slots configured for HARQ-ACK transmission, wherein sending the plurality of HARQ-ACK feedback indications includes: The first HARQ-ACK feedback indication is sent using the first format type from one or more of the aforementioned format types, wherein the first format type includes PSFCH format 0 transmission; and The second HARQ-ACK feedback indication is sent using the second format type from one or more of the format types, wherein the second format type includes PSFCH format 2 transmission.

25. The method according to claim 24, wherein, Sending the multiple HARQ-ACK feedback indications includes: The first HARQ-ACK feedback indication is sent using a first resource set of a first subset of the time slot set; and The second HARQ-ACK feedback indication is sent using the second resource set of the second time slot subset of the time slot set.

26. The method according to claim 21, wherein, The first format type includes a PSFCH format 0HARQ-ACK transmission with at least one of a first time slot offset or a first period, and wherein the second format type includes a PSFCH format 2HARQ-ACK transmission with at least one of a second time slot offset or a second period.

27. The method according to claim 17, wherein, Sending the plurality of HARQ-ACK feedback indications includes: using a PSSCH resource set to send the plurality of HARQ-ACK feedback indications, wherein using the PSSCH resource set to send the plurality of HARQ-ACK feedback indications includes: The multiple HARQ-ACK feedback indications are reported as dedicated media access control (MAC) control elements. The multiple HARQ-ACK feedback indicators are mounted on the PSSCH resource set. The multiple HARQ-ACK feedback indications are reported using Dedicated Side Link Control Information (SCI) Format 2, or The multiple HARQ-ACK feedback indications are reported using the dedicated SCI format 1.

28. The method of claim 27, further comprising: Receive an indication of the PSSCH resource set from the base station; Receive allocation of report resources; as well as Use the reporting resources to report the indications for the PSSCH resource set to additional UEs.

29. The method of claim 17, further comprising: Receive an indication from another UE to select the PSSCH resource set, wherein the PSSCH resource set includes a PSSCH resource set reserved for the plurality of PSSCH communications or a resource set reserved for HARQ-ACK reports.

30. The method of claim 17, wherein, The single sidelink component carrier includes UE-specific sidelink component carriers.

31. The method according to claim 17, wherein, The mapping is based, at least in part, on an index of the set of subchannels associated with the plurality of sidelink component carriers.

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