Techniques for multiple physical sidelink feedback channel occasions with collision indication

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a first user equipment (UE) may receive configuration information indicating a set of candidate physical sidelink feedback shared channel (PSFCH) occasions, the set of candidate PSFCH occasions defined at least in part by a sidelink PSFCH parameter value and at least one of a first time slot or a second time slot. The UE may receive a first sidelink control information (SCI) and a second SCI indicating conflicting resources. The UE may transmit a conflict indication associated with the conflicting resource in a selected available PSFCH occasion, where the selected available PSFCH occasion is one of a set of available PSFCH occasions of the set of candidate PSFCH occasions, where the set of available PSFCH occasions is based on the first time slot and the second time slot. Numerous other aspects are described.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to International Patent Application No. PCT / CN2023 / 129559, filed November 3, 2023, entitled “TECHNIQUES FOR MULTIPLEPHYSICAL SIDELINK FEEDBACK CHANNEL (PSFCH) OCCASIONS FOR PSFCH WITH CONFLICTINDICATION,” which is assigned to the assignee of this application. The disclosure of the earlier application is considered part of this patent application and is incorporated herein by reference. Technical Field

[0003] All aspects of this disclosure relate to wireless communication in general, and more particularly to techniques, apparatus and methods for collision indication associated with the timing of feedback channels of multiple physical side links.

[0004] Related technical descriptions

[0005] Wireless communication systems are widely deployed to provide a variety of services, including voice, text, messaging, video, data, and / or other services. Services may include unicast, multicast, and / or broadcast services, etc. Typical wireless communication systems employ multiple access radio access technologies (RATs) capable of supporting communication with multiple users by sharing available system resources (e.g., time-domain resources, frequency-domain resources, spatial-domain resources, and / or device transmit power, etc.). Examples of such multiple access RATs 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, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems.

[0006] These multiple access RATs have been adopted in various telecommunications standards to provide a common protocol enabling different wireless communication devices to communicate at the city, national, regional, or global level. An example telecommunications standard is New Radio (NR). NR (also known as 5G) is part of the continuous evolution of mobile broadband announced by the 3rd Generation Partnership Project (3GPP). NR (and other mobile broadband evolutions beyond NR) can be designed to better support the Internet of Things (IoT) and reduced-capacity device deployments, industrial connectivity, millimeter-wave (mmWave) expansion, licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployments, sidelinks and other device-to-device direct communication technologies (e.g., cellular vehicle-to-everything (CV2X) communications), massive MIMO, decomposed network architectures and network topology expansion, multi-subscriber implementations, high-precision positioning and / or radio frequency (RF) sensing, and more. As the demand for mobile broadband access continues to grow, further improvements to NR can be made, and other radio access technologies (such as 6G) can be introduced to further advance mobile broadband evolution. Summary of the Invention

[0007] Some aspects described herein relate to a first user equipment (UE) for wireless communication. The first UE may include: one or more memories; and one or more processors coupled to the one or more memories. The one or more processors may be configured to cause the first UE to receive configuration information indicating a set of candidate Physical Sidelink Feedback Shared Channel (PSFCH) timings, wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot. The one or more processors may be configured to cause the first UE to receive first sidelink control information (SCI) indicating a first reserved resource from a second UE in a first time slot. The one or more processors may be configured to cause the first UE to receive a second SCI indicating a second reserved resource from a third UE in a second time slot. The one or more processors may be configured to cause the first UE to send a conflict indication associated with a conflicting resource to the second UE in a selected available PSFCH timing, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one available PSFCH timing in a set of available PSFCH timings of a set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on the first time slot and the second time slot.

[0008] Some aspects described herein relate to a second UE for wireless communication. The second user equipment may include: one or more memories; and one or more processors coupled to the one or more memories. The one or more processors may be configured to cause the second UE to transmit a first SCI in a first timeslot, the first SCI indicating a conflicting resource corresponding to a sidelink resource reservation performed by a third UE. The one or more processors may be configured to cause the second UE to monitor a first subset of candidate PSFCH opportunities from a set of candidate PSFCH opportunities for PSFCH communication.

[0009] Some aspects described herein relate to a method of wireless communication performed by a first UE. The method may include receiving configuration information indicating a set of candidate PSFCH timings, wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot. The method may include receiving a first SCI indicating a first reserved resource from a second UE in a first time slot. The method may include receiving a second SCI indicating a second reserved resource from a third UE in a second time slot. The method may include sending a conflict indication associated with a conflicting resource to the second UE in a selected available PSFCH timing, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one of the available PSFCH timings in the set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on the first time slot and the second time slot.

[0010] Some aspects described herein relate to a method for wireless communication performed by a second UE. The method may include transmitting a first SCI in a first timeslot, the first SCI indicating conflicting resources corresponding to sidelink resource reservations performed by a third UE. The method may also include monitoring a first subset of candidate PSFCH opportunities from a set of candidate PSFCH opportunities for PSFCH communication.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a first UE. When executed by one or more processors of the first UE, the set of instructions enables the first UE to receive configuration information indicating a set of candidate PSFCH timings, wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot. When executed by one or more processors of the first UE, the set of instructions enables the first UE to receive a first SCI indicating a first reserved resource from a second UE in a first time slot. When executed by one or more processors of the first UE, the set of instructions enables the first UE to receive a second SCI indicating a second reserved resource from a third UE in a second time slot. When executed by one or more processors of the first UE, the instruction set enables the first UE to send a conflict indication associated with a conflicting resource to the second UE in a selected available PSFCH timing, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one of a set of available PSFCH timings of a set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on the first time slot and the second time slot.

[0012] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a second UE. When executed by one or more processors of the second UE, the set of instructions enables the second UE to transmit a first SCI in a first timeslot, the first SCI indicating a conflicting resource corresponding to a sidelink resource reservation performed by a third UE. When executed by one or more processors of the second UE, the set of instructions enables the second UE to monitor a first subset of candidate PSFCH opportunities from a set of candidate PSFCH opportunities for PSFCH communication.

[0013] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for receiving configuration information indicating a set of candidate PSFCH timings, wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot. The apparatus may include components for receiving a first SCI indicating a first reserved resource from a first UE in a first time slot. The apparatus may include components for receiving a second SCI indicating a second reserved resource from a second UE in a second time slot. The apparatus may include components for transmitting a conflict indication associated with a conflicting resource to the first UE in a selected available PSFCH timing, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one of the available PSFCH timings in the set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on the first time slot and the second time slot.

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for transmitting a first SCI in a first time slot, the first SCI indicating conflicting resources corresponding to a sidelink resource reservation performed by a UE. The apparatus may also include components for monitoring a first subset of candidate PSFCH opportunities within a set of candidate PSFCH opportunities for PSFCH communication.

[0015] Various aspects of this disclosure may be implemented or be implemented as described in whole by or embodied in the methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network nodes, network entities, wireless communication devices and / or processing systems as fully described in the specification and drawings and illustrated in the specification and drawings.

[0016] The preceding paragraphs of this section have broadly summarized some aspects of this disclosure. These and additional aspects and their associated advantages will be described below. The disclosed aspects can serve as the basis for modifying or designing other aspects for performing the same or similar purposes of this disclosure. Such equivalent aspects do not depart from the scope of the appended claims. The characteristics of the aspects disclosed herein, their organization and operation, and their associated advantages will be better understood from the following description taken in conjunction with the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings illustrate some aspects of this disclosure but do not limit its scope, as other aspects can be achieved by this description. Each drawing in the drawings is provided for illustrative and descriptive purposes and not as a definition of limitation of the claims. Identical or similar reference numerals in different drawings may identify identical or similar elements.

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

[0019] Figure 2 This is a diagram illustrating an example network node communicating with an example user equipment (UE) in a wireless network.

[0020] Figure 3 This is a diagram illustrating an example decomposed base station architecture according to this disclosure.

[0021] Figure 4 This is a diagram illustrating an example of sidelink communication according to this disclosure.

[0022] Figure 5 This is a diagram illustrating an example of a sidelink conflict according to this disclosure.

[0023] Figures 6A to 6E This is a diagram illustrating an example of the timing of multiple physical side link feedback channels (PSFCHs) associated with a PSFCH having a conflict indication, according to this disclosure.

[0024] Figure 7 This is a diagram illustrating an example process performed, for example, at the UE or a device of the UE, according to this disclosure.

[0025] Figure 8 This is a diagram illustrating an example process performed, for example, at the UE or a device of the UE, according to this disclosure.

[0026] Figure 9 This is a diagram of an example device for wireless communication according to the present disclosure. Detailed Implementation

[0027] Various aspects of this disclosure are described below with reference to the accompanying drawings. However, aspects of this disclosure may be embodied in many different forms and should not be construed as limited to any specific aspect illustrated or described with reference to the drawings or otherwise presented in this disclosure. Rather, these aspects are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of protection of this disclosure to those skilled in the art. Those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, various combinations or numbers of aspects set forth herein may be used to implement an apparatus or a practice. Furthermore, the scope of this disclosure is intended to cover apparatuses having structures and / or functionalities other than those available for practicing the various aspects of this disclosure set forth herein, or methods practiced using these other structures and / or functionalities. Any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0028] Various methods, operations, apparatuses, and techniques will now be presented with reference to them. These methods, operations, apparatuses, and techniques will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively, “elements”). These elements may be implemented using hardware, software, or a combination of hardware and software. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0029] User equipment (UE) can communicate with another UE via a sidelink. In some cases, a UE receiving a sidelink transmission from another UE can report a sidelink Hybrid Automatic Repeat Request (HARQ)-Acknowledgement (HARQ-ACK) feedback message to the transmitting UE to indicate whether the sidelink transmission can be received and decoded by the receiving UE. The receiving UE can use the sidelink channel, the sidelink feedback channel, and / or the Physical Sidelink Feedback Channel (PSFCH) to report the sidelink HARQ-ACK feedback message.

[0030] Additionally, in some cases, a first UE (e.g., UE A) may provide notification services to the sidelink environment (e.g., during periods when the first UE does not transmit). For example, in some cases, a second UE may transmit first sidelink control information (SCI) indicating the reservation of first sidelink resources, and a third UE may transmit a second SCI indicating the reservation of second sidelink resources. In some cases, first and second sidelink resources may conflict with each other, resulting in a scenario referred to as a conflict. In some cases, the sidelink resources involved in the conflict (e.g., first and second sidelink resources) may be referred to as "conflicting resources." In some cases, a conflict (which may also be referred to as a "collision") may involve complete overlap of frequency and / or time between resources (e.g., between two resources). In some cases, for example, the first resource may be the second resource. Alternatively, a conflict may involve partial overlap of frequency and / or time between resources.

[0031] The first UE can receive a first SCI and a second SCI. The first UE can identify a conflict between a first sidelink resource and a second sidelink resource. To facilitate more efficient resource allocation, the first UE can notify the second UE and / or a third UE of the conflict. For example, in some cases, the first UE can use PSFCH communication to send a conflict indication at a selected PSFCH timing. For example, the first UE can send PSFCH communication to the second UE and the third UE associated with the lowest priority transmission (e.g., a transmission corresponding to a sidelink resource reservation in SCI 1 or SCI 2, respectively). In this way, the UE associated with the lower priority transmission can be notified of the conflict and attempt to mitigate the conflict by reserving different sidelink resources and / or dropping the transmission. The PSFCH timing can be a transmission timing or transmission opportunity associated with one or more PSFCH transmissions (e.g., for the UE to send a conflict indication for reserved sidelink resources). For example, the PSFCH timing may include one or more time-domain resources (e.g., transmission time intervals, subframes, time slots, micro-time slots, symbols and / or other time-domain resources) and one or more frequency-domain resources (e.g., resource blocks, resource elements, subcarriers and / or other frequency-domain resources).

[0032] In some cases, the PSFCH timing to be used for transmitting the collision indication (e.g., the selected PSFCH timing) can be determined based on the value of the sidelink PSFCH timing parameter (sl-PSFCH-Occasion). For example, in some cases, the sidelink PSFCH timing parameter may have a value of 0 or 1. For example, if sl-PSFCH-Occasion = "0", the first UE may transmit PSFCH communication in a first time slot, which includes PSFCH resources and is at least several time slots provided by the first time slot in the resource pool following the time slot that provides the physical sidelink control channel (PSCCH) reception for SCI. In some cases, the PSFCH resources are located in a time slot that is at least several time slots equal to the second time slot preceding the resource associated with the collision indication (e.g., the conflicting resource). For example, the first time slot may be the minimum PSFCH time slot (e.g., sl-MinTimeGapPSFCH), and the second time slot may be the maximum time to complete the sensing and resource selection process (e.g., ...). If sl-PSFCH-Occasion = "1", then the first UE can send PSFCH communication in the latest time slot, which includes PSFCH resources and is at least several times the time slot preceding the resource pool of resources associated with conflict information (e.g., conflicting resources). The PSFCH resource is located in a time slot that is at least several time slots (e.g., sl-MinTimeGapPSFCH) following the time slot that provides PSCCH reception for SCI; otherwise, the first UE may avoid sending PSFCH communications with a collision indication.

[0033] In some cases, UE A can be configured with multiple PSFCH opportunities for sending HARQ-ACK feedback. For example, in some cases, a single PSCCH / PSSCH transmission may have N associated candidate PSFCH opportunities. For sidelink communication over unlicensed frequency bands, multiple PSFCH opportunities can be supported for HARQ-ACK feedback to increase the probability of PSFCH transmission. However, some wireless communication standards may only allow the UE to send a PSFCH including a collision indication in a single PSFCH opportunity.

[0034] Various aspects as a whole relate to sidelink conflict indication. Some aspects more specifically relate to multiple PSFCH timings for transmitting PSFCH communication with conflict indication. For example, in some aspects, a first UE may be configured with a set of candidate PSFCH timings associated with a multiple PSFCH timing conflict indication configuration. The set of candidate PSFCH timings may be defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot. The first UE may receive a first SCI from a second UE and a second SCI from a third UE. The first SCI and the second SCI may include conflicting sidelink resource reservations. The first UE may select a PSFCH timing from the multiple PSFCH timings for transmitting the conflict indication. For example, the first UE may select a PSFCH timing from a set of available PSFCH timings. The set of available PSFCH timings may be a subset of the set of candidate PSFCH timings and may be based on a first time slot and a second time slot.

[0035] Specific aspects of the subject matter described in this disclosure can be implemented to achieve one or more of the following potential advantages. In some examples, by allowing the UE to select a PSFCH timing from multiple PSFCH timings, the described techniques can be used to enable a sidelink UE to support multiple PSFCH timings for transmitting PSFCH communication with conflict indication. In some examples, by enabling a sidelink UE to support multiple PSFCH timings for conflict indication, the described techniques can be used to implement more flexible conflict indication, thereby improving the likelihood that the conflict indication can be received by the UE, and thus increasing the likelihood of mitigating sidelink resource reservation conflicts. In some examples, by selecting a PSFCH timing from a set of available PSFCH timings based on a first time slot and a second time slot, the described techniques can be used to enable the UE to select from multiple PSFCH timings occurring within a time period, making it more likely that the UE receiving the conflict indication will have time to mitigate the conflict, thereby improving sidelink resource allocation efficiency and thus having a positive impact on sidelink performance.

[0036] Multiple access radio access technology (RAT) has been adopted in various telecommunications standards to provide a common protocol that enables wireless communication devices to communicate at the city, enterprise, national, regional, or global level. For example, 5G New Radio (NR) is part of the ongoing evolution of mobile broadband, promulgated by the 3rd Generation Partnership Project (3GPP). 5G NR supports a variety of technologies and use cases, including enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), massive machine-type communication (mMTC), millimeter wave (mmWave) technology, beamforming, network slicing, edge computing, Internet of Things (IoT) connectivity and management, and network function virtualization (NFV).

[0037] As the demand for broadband access increases and as the technologies supported by wireless communication networks evolve, further technological improvements can be adopted or implemented in 5G NR or future RATs (such as 6G) to further drive the evolution of wireless communication for a wide range of existing and new use cases and applications. Such technological improvements may be associated with: new frequency band extensions, licensed and unlicensed spectrum access, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, decomposed network architectures and network topology extensions, device aggregation, advanced duplex communication, sidelinks and direct communication between other devices, IoT (including passive or environmental IoT) networks, RedCap UE functionality, industrial connectivity, multi-user implementations, high-precision positioning, radio frequency (RF) sensing and / or artificial intelligence or machine learning (AI / ML), and more. Such technological improvements can support use cases such as: wireless backhaul, wireless data centers, extended reality (XR) and metaverse applications, meta-services for supporting vehicle connectivity, holographic and mixed reality communications, autonomous and collaborative robotics, vehicle platooning and cooperative maneuvering, sensor networks, gesture detection, brain-computer interfaces, digital twin applications, asset management, and comprehensive coverage applications using off-ground and / or aerial platforms, etc. The methods, operations, apparatuses, and techniques described herein can facilitate one or more of the aforementioned technologies and / or support one or more of the aforementioned use cases.

[0038] Figure 1 This is a diagram illustrating an example of a wireless communication network 100 according to the present disclosure. The wireless communication network 100 may be a 5G (or NR) network or a 6G network, or may include elements of a 5G (or NR) network or a 6G network, etc. The wireless communication network 100 may include a plurality of network nodes 110, shown as network node (NN) 110a, network node 110b, network node 110c, and network node 110d. Network nodes 110 may support communication with a plurality of UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e).

[0039] Network nodes 110 and UEs 120 of wireless communication network 100 can communicate using the electromagnetic spectrum, which can be subdivided by frequency or wavelength into various categories, frequency bands, carriers, and / or channels. For example, devices of wireless communication network 100 can communicate using one or more operating frequency bands. In some aspects, multiple wireless communication networks 100 can be deployed in a given geographical area. Each wireless communication network 100 can support a specific RAT (which may also be referred to as an air interface) and can operate on one or more carrier frequencies within one or more frequency ranges. Examples of RATs include 4G RATs, 5G / NRRATs, and / or 6G RATs, etc. In some examples, when multiple RATs are deployed in a given geographical area, each RAT in that geographical area can operate on a different frequency to avoid interference with each other.

[0040] Various operating frequency bands have been defined as frequency ranges designated FR1 (410 MHz to 7.125 GHz), FR2 (24.25 GHz to 52.6 GHz), FR3 (7.125 GHz to 24.25 GHz), FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Although a portion of FR1 is greater than 6 GHz, in some documents and articles, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band. Similarly, in some documents and articles, FR2 is often (interchangeably) referred to as the “millimeter wave” band, but this is different from the Very High Frequency (EHF) band (30 GHz to 300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU). The frequencies between FR1 and FR2 are often referred to as the mid-band frequencies, including FR3. Frequency bands falling within FR3 can inherit FR1 or FR2 characteristics, thereby effectively extending the characteristics of FR1 or FR2 into mid-band frequencies. Therefore, "below 6 GHz" (if used herein) can broadly refer to frequencies less than 6 GHz, within FR1, and / or included in mid-band frequencies. Similarly, the term "millimeter wave" (if used herein) can broadly refer to frequencies included in mid-band frequencies, within FR2, FR4, FR4-a, FR4-1, or FR5, and / or within the EHF band. Higher frequency bands can extend 5G NR operation, 6G operation, and / or other RATs above 52.6 GHz. For example, each of FR4a, FR4-1, FR4, and FR5 falls within the EHF band. In some examples, the wireless communication network 100 can implement dynamic spectrum sharing (DSS), where multiple RATs (e.g., 4G / LTE and 5G / NR) are implemented within a single frequency band using dynamic bandwidth allocation (e.g., based on user demand). It is conceivable that the frequencies included in these operating frequency bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1 and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0041] Network node 110 may include one or more devices, components, or systems that facilitate communication between UE 120 and one or more devices, components, or systems of wireless communication network 100. Network node 110 may be, may include, or may also be referred to as an NR network node, 5G network node, 6G network node, node B, eNB, gNB, access point (AP), transmit / receive point (TRP), mobility element, core, network entity, network element, network equipment, and / or another type of device, component, or system included in the radio access network (RAN).

[0042] Network node 110 may be implemented as a single physical node (e.g., a single physical structure) or as two or more physical nodes (e.g., two or more different physical structures). For example, network node 110 may be a device or system implementing a portion of the radio protocol stack, a device or system implementing a complete radio protocol stack (such as a complete gNB protocol stack), or a collection of devices or systems collectively implementing a complete radio protocol stack. For example, and as shown, network node 110 may be an aggregated network node (with an aggregated architecture), meaning that network node 110 can implement a complete radio protocol stack physically and logically integrated within a single node (e.g., a single physical structure) in the wireless communication network 100. For example, aggregated network node 110 may consist of a single standalone base station or a single TRP that uses the complete radio protocol stack to implement or facilitate communication between UE 120 and the core network of wireless communication network 100.

[0043] Alternatively, and also as shown in the figure, network node 110 can be a decomposed network node (sometimes referred to as a decomposed base station), meaning that network node 110 can realize a radio protocol stack that is physically distributed and / or logically distributed among two or more nodes in the same or different geographical locations. For example, a decomposed network node may have a decomposed architecture. In some deployments, decomposed network node 110 may be used in integrated access and backhaul (IAB) networks, in open radio access networks (O-RAN) (such as network configurations compliant with the O-RAN Alliance), or in virtualized radio access networks (vRAN) (also referred to as cloud radio access networks (C-RAN)) to facilitate scaling by decomposing base station functionality into multiple units that can be deployed independently.

[0044] Network nodes 110 of wireless communication network 100 may include one or more central units (CUs), one or more distributed units (DUs), and / or one or more radio units (RUs). CUs may host one or more higher-layer control functions, such as Radio Resource Control (RRC) functions, Packet Data Convergence Protocol (PDCP) functions, and / or Service Data Adaptation Protocol (SDAP) functions, etc. DUs may host one or more of the Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and / or one or more high physical (PHY) layers, depending at least in part on a functional split (such as functional splits defined by 3GPP). In some examples, DUs may also host one or more low-PHY layer functions, such as Fast Fourier Transform (FFT), Inverse FFT (iFFT), beamforming, Physical Random Access Channel (PRACH) extraction and filtering, and / or scheduling of resources for one or more UEs 120, etc. RUs may host RF processing functions or low-PHY layer functions, such as FFT, iFFT, beamforming, or PRACH extraction and filtering, etc., depending on a functional split (such as lower-layer functional splits). In this type of architecture, each RU can be operated to handle over-the-air (OTA) communications with one or more UE 120s.

[0045] In some aspects, a single network node 110 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. Additionally or alternatively, network node 110 may include one or more near real-time (near RT) RAN Intelligent Controllers (RICs) and / or one or more non-real-time (non-RT) RICs. In some examples, CUs, DUs, and / or RUs may be implemented as virtual units, such as Virtual Central Units (VCUs), Virtual Distributed Units (VDUs), or Virtual Radio Units (VRUs), etc. Virtual units may be implemented as virtual network functions, such as those associated with cloud deployments.

[0046] Some network nodes 110 (e.g., base stations, RUs, or TRPs) can provide communication coverage for specific geographic areas. In 3GPP, the term "cell" can refer to the coverage area of ​​network node 110 or to network node 110 itself, depending on the context in which the term is used. Network node 110 can support one or more (e.g., three) cells. In some examples, network node 110 can provide communication coverage for macro cells, pico cells, femto cells, or another type of cell. A macro cell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UE 120 with a service subscription. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UE 120 with a service subscription. A femto cell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UE 120 associated with that femto cell (e.g., UE 120 in a Closed Subscriber Group (CSG)). The network node 110 used for a macro cell may be referred to as a macro network node. Network node 110 used for a picocell may be referred to as a pico network node. Network node 110 used for a femtocell may be referred to as a femto network node or a home network node. In some examples, the cell may not necessarily be stationary. For example, the geographical area of ​​the cell may move depending on the location of the associated mobile network node 110 (e.g., a train, satellite base station, drone, or NTN network node).

[0047] The wireless communication network 100 can be a heterogeneous network, comprising different types of network nodes 110, such as macro network nodes, piconet nodes, femtonet nodes, relay network nodes, aggregation network nodes, and / or decomposition network nodes, etc. Figure 1 In the example shown, network node 110a can be a macro network node for macro cell 130a, network node 110b can be a pico network node for pico cell 130b, and network node 110c can be a femto network node for femto cell 130c. Compared to other types of network nodes 110, the various types of network nodes 110 typically transmit at different power levels, serve different coverage areas, and / or have different effects on interference in the wireless communication network 100. For example, macro network nodes may have high transmit power levels (e.g., 5 watts to 40 watts), while pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 watts to 2 watts).

[0048] In some examples, network node 110 may be, may include, or operate as a RU, TRP, or base station communicating with one or more UEs 120 via a radio access link (which may be referred to as a "Uu" link). The radio access link may include a downlink and an uplink. A "downlink" (or "DL") refers to the communication direction from network node 110 to UE 120, and an "uplink" (or "UL") refers to the communication direction from UE 120 to network node 110. Downlink channels may include one or more control channels and one or more data channels. Downlink control channels may be used to transmit downlink control information (DCI) (e.g., scheduling information, reference signals, and / or configuration information) from network node 110 to UE 120. Downlink data channels may be used to transmit downlink data (e.g., user data associated with UE 120) from network node 110 to UE 120. Downlink control channels may include one or more physical downlink control channels (PDCCH), and downlink data channels may include one or more physical downlink shared channels (PDSCH). The uplink channel may similarly include one or more control channels and one or more data channels. The uplink control channel can be used to transmit uplink control information (UCI) from UE 120 to network node 110 (e.g., transmitting corresponding reference signals and / or feedback with one or more downlinks). The uplink data channel can be used to transmit uplink data (e.g., user data associated with UE 120) from UE 120 to network node 110. The uplink control channel may include one or more physical uplink control channels (PUCCH), and the uplink data channel may include one or more physical uplink shared channels (PUSCH). The downlink and uplink may each include a set of resources on which network node 110 and UE 120 can communicate.

[0049] Downlink and uplink resources may include time-domain resources (frames, subframes, time slots, and / or symbols), frequency-domain resources (bands, component carriers, subcarriers, resource blocks, and / or resource elements), and / or spatial-domain resources (specific transmission directions and / or beam parameters). Frequency-domain resources in some bands may be subdivided into bandwidth portions (BWPs). A BWP may be a contiguous block of frequency-domain resources allocated to one or more UEs 120 (e.g., a contiguous block of resource blocks). A UE 120 may be configured with both an uplink BWP and a downlink BWP (where the uplink BWP and downlink BWP may be the same BWP or different BWPs). BWPs may be dynamically configured and / or reconfigured (e.g., by sending DCI configuration to one or more UEs 120 via network node 110), meaning that BWPs may be adjusted in real-time (or near real-time) based on changing network conditions in the wireless communication network 100 and / or based on the specific requirements of one or more UEs 120. This allows for more efficient use of available frequency domain resources in the wireless communication network 100, as fewer frequency domain resources can be allocated to the BWP for UE 120 (which reduces the number of frequency domain resources that UE 120 needs to monitor), thus allowing more frequency domain resources to be distributed across multiple UE 120s. Therefore, the BWP can also assist in the implementation of such UE 120s by facilitating the configuration of smaller bandwidths for communications performed by lower-capacity UE 120s.

[0050] As described above, in some aspects, the wireless communication network 100 may be an IAB network, may include an IAB network, or may be included in an IAB network. In an IAB network, at least one network node 110 is an anchor network node communicating with a core network. The anchor network node 110 may also be referred to as an IAB donor (or "IAB donor"). The anchor network node 110 may be connected to the core network via a wired backhaul link. For example, the Ng interface of the anchor network node 110 may terminate at the core network. Additionally or alternatively, the anchor network node 110 may be connected to one or more devices in the core network that provide core access and mobility management functions (AMF). An IAB network typically also includes multiple non-anchor network nodes 110, which may also be referred to as relay network nodes or simply IAB nodes (or "IAB-nodes"). Each non-anchor network node 110 can directly communicate with the anchor network node 110 via a wireless backhaul link to access the core network, or can indirectly communicate with the anchor network node 110 via one or more other non-anchor network nodes 110 and an associated wireless backhaul link forming a backhaul path to the core network. Some anchor network nodes 110 or other non-anchor network nodes 110 can also directly communicate with one or more UEs 120 via a wireless access link carrying access services. In some examples, network resources used for wireless communication (such as time resources, frequency resources, and / or spatial resources) can be shared between the access link and the backhaul link.

[0051] In some examples, any network node 110 relaying communication may be referred to as a relay network node, a relay station, or simply a repeater. A repeater may receive communications from an upstream station (e.g., another network node 110 or UE 120) and transmit communications to a downstream station (e.g., UE 120 or another network node 110). In this case, the wireless communication network 100 may include or be referred to as a "multi-hop network." Figure 1 In the example shown, network node 110d (e.g., a relay network node) can communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a and UE 120d. Additionally or alternatively, UE 120 can be a relay station capable of relaying transmissions to or from other UE 120s, or can operate as such a relay station. UE 120 relaying communication can be referred to as a UE repeater or relay UE, etc.

[0052] UE 120 may be physically distributed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. UE 120 may be, may include, an access terminal, another terminal, a mobile station, or a subscriber unit, or may be included in an access terminal, another terminal, a mobile station, or a subscriber unit. UE 120 may be, or may include, a cellular phone (e.g., a smartphone), 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smartwatch, smart clothing, smart glasses, a smart wristband and / or smart jewelry (such as a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device and / or a satellite radio), an XR device, a vehicle component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device), a UE function of a network node, and / or any other suitable device or function that can communicate via a wireless medium, or may be coupled to them.

[0053] UE 120 and / or network node 110 may include one or more chips, system-on-a-chip (SoC), chipsets, packages, or devices that individually or collectively constitute or include a processing system. The processing system includes processor (or “processing”) circuitry in the form of one or more processors, microprocessors, processing units (such as central processing units (CPUs), graphics processing units (GPUs), neural processing units (NPUs), and / or digital signal processors (DSPs)), processing blocks, application-specific integrated circuits (ASICs), programmable logic devices (PLDs) (such as field-programmable gate arrays (FPGAs)), or other discrete gate or transistor logic components or circuits (all of which are generally referred to herein individually as “processors” or collectively as “processors” or “processor circuitry”). One or more of these processors may be individually or collectively configured to perform the various functions or operations described herein. A group of processors that can be configured or configured to perform a set of functions may include a first processor that can be configured or configured to perform a first function in the set, and a second processor that can be configured or configured to perform a second function in the set, or may include the entire group of processors that are configured or configured to perform the set of functions.

[0054] The processing system may also include memory circuitry in the form of one or more memory devices, memory blocks, memory elements, or other discrete gate or transistor logic components or circuits, each of which may include tangible storage media such as random access memory (RAM) or read-only memory (ROM) or combinations thereof (all of which are generally referred to herein individually as "memory" or collectively as "memory" or "memory circuitry"). One or more of these memories may be coupled to one or more processors in the processor (e.g., operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) and may store processor-executable code (such as software) individually or collectively, which, when executed by one or more processors in the processor, may configure one or more processors in the processor to perform the various functions or operations described herein. Additionally or alternatively, in some examples, one or more processors in the processor may be pre-configured to perform the various functions or operations described herein without being configured by software. The processing system may also include or be coupled to one or more modems (such as Wi-Fi (e.g., IEEE compliant) modems or cellular (e.g., 3GPP 4G LTE, 5G, or 6G compliant) modems). In some embodiments, one or more processors of the processing system include or implement one or more modems among the modems. The processing system may also include, or be coupled to, multiple radio components (collectively, “radio components”), multiple RF chains, or multiple transceivers, each of which may in turn be coupled to one or more antennas among multiple antennas. In some embodiments, one or more processors of the processing system include or implement one or more of the radio components, RF chains, or transceivers. UE 120 may be included or may be contained in a housing that houses components associated with UE 120, including the processing system.

[0055] Some UEs 120 may be considered Machine Type Communication (MTC) UEs, Evolved or Enhanced Machine Type Communication (eMTC) UEs, Further Enhanced eMTC (feMTC) UEs, or Enhanced feMTC (efeMTC) UEs, or further evolutions thereof, all of which may be referred to simply as "MTC UEs". MTC UEs may be, may include, or may be included in or coupled with the following: robots, unmanned aerial vehicles, remote devices, sensors, instruments, monitors, and / or location tags. Some UEs 120 may be considered IoT devices and / or may be implemented as NB-IoT (Narrowband IoT) devices. IoT UEs or NB-IoT devices may be, may include, or may be included in or coupled with the following: industrial machines, appliances, refrigerators, doorbell camera devices, home automation devices, and / or lighting fixtures, etc. Some UEs 120 may be considered customer premises equipment, which may include telecommunications equipment installed at a customer location (such as a home or office) to enable access to a service provider’s network (such as being included in or communicating with the wireless communication network 100).

[0056] Some UEs 120 can be categorized according to different categories associated with varying levels of complexity and / or capabilities. Category 1 UEs 120 facilitate large-scale IoT within the wireless communication network 100 and offer lower complexity and / or cost compared to Category 2 UEs 120. Category 2 UEs 120 may include mission-critical IoT devices capable of URLLC, eMBB, and / or precise positioning within the wireless communication network 100, legacy UEs, baseline UEs, high-level UEs, advanced UEs, full-capability UEs, and / or premium UEs. Category 3 UEs 120 may possess intermediate-level complexity and / or capabilities (e.g., capabilities between Category 1 and Category 2 UEs 120). Category 3 UEs 120 may be referred to as reduced-capability UEs (“RedCap UEs”), intermediate-level UEs, NR lightweight UEs, and / or NR simplified UEs, etc. RedCap UEs bridge the gap in capabilities and complexity between NB-IoT devices and / or eMTC UEs and mission-critical IoT devices and / or premium UEs. RedCap UEs can include, for example, wearable devices, IoT devices, industrial sensors, and / or cameras associated with limited bandwidth, power capacity, and / or transmission range. RedCap UEs can support healthcare environments, building automation, power distribution, process automation, transportation and logistics, and / or smart city deployments, among others.

[0057] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly with each other using sidelink communication (e.g., without communicating through a network node 110 acting as an intermediary). As an example, UE 120a can directly send data, control information, or other signaling to UE 120e as sidelink communication. This contrasts with, for example, UE 120a first sending data to network node 110 in UL communication, and then that network node sending data to UE 120e in DL communication. In various examples, UE 120 can use the following to send and receive sidelink communication: peer-to-peer (P2P) communication protocols, device-to-device (D2D) communication protocols, vehicle-to-everything (V2X) communication protocols (which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, and / or vehicle-to-pedestrian (V2P) protocols), and / or mesh network communication protocols. In some deployments and configurations, network node 110 may schedule and / or allocate resources for sidelink communication between UEs 120 in the wireless communication network 100. In some other deployments and configurations, UE 120 (instead of network node 110) may perform or cooperate with or negotiate with one or more other UEs to perform scheduling operations, resource selection operations, and / or other operations for sidelink communication.

[0058] In various examples, in addition to half-duplex operation, some network nodes and UEs in the wireless communication network 100, including network node 110 and UE 120, can also be configured for full-duplex operation. Network node 110 or UE 120 operating in half-duplex mode can perform only one of transmission or reception during a specific time resource period (such as a specific time slot, symbol, or other time period). Half-duplex operation may involve time division duplex (TDD), where the DL transmission of network node 110 and the UL transmission of UE 120 do not occur in the same time resource (i.e., the transmissions do not overlap in time). In contrast, network node 110 or UE 120 operating in full-duplex mode can transmit and receive communications concurrently (e.g., within the same time resource). By operating in full-duplex mode, network node 110 and / or UE 120 can generally increase the capacity of the network and radio access links. In some examples, full-duplex operation may involve frequency division duplex (FDD), in which network node 110 performs DL transmission in a first frequency band or on a first component carrier, and UE 120 performs transmission in a second frequency band or on a second component carrier, the second frequency band or the second component carrier being different from the first frequency band or the first component carrier, respectively. In some examples, full-duplex operation may be enabled for UE 120 but not for network node 110. For example, UE 120 may simultaneously transmit UL to the first network node 110 and receive DL transmissions from the second network node 110 in the same time resources. In some other examples, full-duplex operation may be enabled for network node 110 but not for UE 120. For example, network node 110 may simultaneously transmit DL to the first UE 120 and receive UL transmissions from the second UE 120 in the same time resources. In some other examples, full-duplex operation may be enabled for both network node 110 and UE 120.

[0059] In some examples, UE 120 and network node 110 can perform MIMO communication. "MIMO" generally refers to the simultaneous transmission or reception of multiple signals (such as multiple layers or multiple data streams) using the same time and frequency resources. MIMO techniques typically utilize multipath propagation. MIMO can be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO can support simultaneous transmission to multiple receivers, which is called multi-user MIMO (MU-MIMO). Some RATs can employ advanced MIMO techniques such as mTRP operations (including redundant transmission or reception on multiple TRPs), reciprocity in the time or frequency domain, single-frequency network (SFN) transmission, or noncoherent joint transmission (NC-JT).

[0060] In some aspects, the first UE (e.g., UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive configuration information indicating a set of candidate PSFCH timings, wherein the set of candidate PSFCH timings is associated with a multi-PSFCH timing conflict indication configuration, and wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot; receive a first SCI indicating a first reserved resource from the second UE in the first time slot; receive a second SCI indicating a second reserved resource from the third UE in the second time slot; and send a conflict indication associated with a conflicting resource to the second UE in a selected available PSFCH timing, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one of the available PSFCH timings in the set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on the first time slot and the second time slot.

[0061] In some aspects, the second UE (e.g., UE 120) may include a communication manager 140. In some aspects, the communication manager 140 may transmit a first SCI in a first timeslot, the first SCI indicating conflicting resources corresponding to sidelink resource reservations made by the third UE; and monitor a first subset of candidate PSFCH opportunities for PSFCH communication. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0062] As indicated above, Figure 1 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 1 The examples described are different.

[0063] Figure 2 This is a diagram illustrating an example network node 110 communicating with example UE 120 in a wireless network.

[0064] like Figure 2As shown, network node 110 may include a data source 212, a transmit processor 214, a transmit (TX) MIMO processor 216, a set of modems 232 (shown as 232a to 232t, where t ≥ 1), a set of antennas 234 (shown as 234a to 234v, where v ≥ 1), a MIMO detector 236, a receive processor 238, a data sink 239, a controller / processor 240, a memory 242, a communication unit 244, and / or a scheduler 246, etc. In some configurations, one or a combination of antennas 234, modems 232, MIMO detectors 236, receive processors 238, transmit processors 214, and / or TX MIMO processors 216 may be included in the transceiver of network node 110. The transceiver may be under the control of and used by one or more processors (such as controller / processor 240), and in some respects, performs aspects of the methods, processes, and / or operations described herein in conjunction with processor-readable code stored in memory 242. In some respects, network node 110 may include one or more interfaces, communication components and / or other components that facilitate communication with UE 120 or another network node.

[0065] The terms “processor,” “controller,” or “controller / processor” can refer to one or more controllers and / or one or more processors. For example, references to “a / the processor,” “a / the controller / processor,” etc. (in the singular) should be understood as referring to a combination of… Figure 2 The processor described refers to any one or more processors, such as a single processor or a combination of multiple different processors. The reference to "one or more processors" should be understood as a combination of references. Figure 2 Any one or more processors described herein. For example, one or more processors of network node 110 may include transmit processor 214, TX MIMO processor 216, MIMO detector 236, receive processor 238, and / or controller / processor 240. Similarly, one or more processors of UE 120 may include MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, and / or controller / processor 280.

[0066] In some aspects, a single processor can perform all operations described as being performed by one or more processors. In some aspects, a first set of one or more processors can perform a first operation described as being performed by that one or more processors, and a second set of one or more processors can perform a second operation described as being performed by that one or more processors. The first set of processors and the second set of processors can be the same set of processors or can be different sets of processors. The reference to "one or more memories" should be understood to refer to any one or more memories of the corresponding device, such as combined... Figure 2 The memory described. For example, an operation described as being performed by one or more memories can be performed by the same subset of the one or more memories or by different subsets of the one or more memories.

[0067] For downlink communication from network node 110 to UE 120, transmitting processor 214 may receive data (“downlink data”) intended for use by UE 120 (or a set of UEs including UE 120) from data source 212 (such as a data pipeline or data queue). In some examples, transmitting processor 214 may select one or more modulation and decoding schemes (MCS) for UE 120 based on one or more channel quality indicators (CQIs) received from UE 120. Network node 110 may process the data (e.g., including encoding the data) according to the MCS selected for UE 120 for transmission to UE 120 on the downlink, thereby generating data symbols. Transmitting processor 214 may process system information (e.g., semi-static resource partitioning information (SRPI)) and / or control information (e.g., CQI requests, grants, and / or upper-layer signaling) and provide overhead symbols and / or control symbols. The transmitting processor 214 can generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS), demodulation reference signals (DMRS), or channel state information (CSI) reference signals (CSI-RS)) and / or synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)).

[0068] The TX MIMO processor 216 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide a set of output symbol streams (e.g., T output symbol streams) to a set of modems 232. For example, each output symbol stream can be provided to a corresponding modulator component (shown as MOD) of modem 232. Each modem 232 can use the corresponding modulator component to process (e.g., modulate) the corresponding output symbol stream (e.g., for Orthogonal Frequency Division Multiplexing (OFDM)) to obtain an output sample stream. Each modem 232 can further use the corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or up-convert) the output sample stream to obtain a time-domain downlink signal. Modems 232a to 232t can transmit a set of downlink signals (e.g., T downlink signals) together via a set of corresponding antennas 234.

[0069] Downlink signals may include DCI communication, MAC control element (MAC-CE) communication, RRC communication, downlink reference signals, or another type of downlink communication. Downlink signals may be transmitted on the PDCCH, PDSCH, and / or on another downlink channel. Downlink signals may carry one or more transport blocks (TBs) of data. A TB may be a data unit transmitted via the air interface in the wireless communication network 100. A data stream (e.g., from data source 212) may be encoded into multiple TBs for transmission via the air interface. The number of TBs used to carry data associated with a particular data stream may be associated with a TB size shared by multiple TBs. The TB size may be based on the radio channel conditions of the air interface, the MCS used to encode the data, downlink resources allocated for transmitting data, and / or other parameters, or otherwise associated with them. Generally, a larger TB size allows for a larger amount of data to be transmitted in a single transmission, reducing signaling overhead. However, a larger TB size may be more prone to transmission and / or reception errors than a smaller TB size, but such errors can be mitigated through more robust error correction techniques.

[0070] For uplink communication from UE 120 to network node 110, the uplink signal from UE 120 may be received by antenna 234, processed by modem 232 (e.g., demodulator component of modem 232, shown as DEMOD), detected where applicable by MIMO detector 236 (e.g., receive (Rx) MIMO processor), and / or further processed by receive processor 238 to obtain decoded data and / or control information. Receive processor 238 may provide the decoded data to data sink 239 (which may be a data pipeline, data queue, and / or another type of data sink) and provide the decoded control information to processors such as controller / processor 240.

[0071] Network node 110 may use scheduler 246 to schedule one or more UEs 120 for downlink or uplink communication. In some aspects, scheduler 246 may use DCI to dynamically schedule DL transmissions to and / or UL transmissions from UE 120. In some examples, scheduler 246 may allocate repetitive time-domain and / or frequency-domain resources that UE 120 may use to transmit and / or receive communication using RRC configuration (e.g., semi-static configuration), for example, to perform semi-persistent scheduling (SPS) or to configure configuration grant (CG) for UE 120.

[0072] One or more of the following may be included in the RF chain of network node 110: transmit processor 214, TX MIMO processor 216, modem 232, antenna 234, MIMO detector 236, receive processor 238, and / or controller / processor 240. The RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs), and / or other devices for converting analog signals (such as those used for transmission or reception via an air interface) to digital signals (such as those used for processing by one or more processors of network node 110). In some aspects, the RF chain may be a transceiver of network node 110, or may be included in such a transceiver.

[0073] In some examples, network node 110 may use communication unit 244 to communicate with the core network and / or other network nodes. Communication unit 244 may support wired and / or wireless communication protocols and / or connections, such as Ethernet, fiber optic, Common Public Radio Interface (CPRI), and / or wired or wireless backhaul, etc. Network node 110 may use communication unit 244 to send and / or receive data associated with UE 120, or to perform network control signaling, etc. Communication unit 244 may include transceivers and / or interfaces, such as network interfaces.

[0074] UE 120 may include a collection of antennas 252 (shown as antennas 252a to 252r, where r ≥ 1), a collection of modems 254 (shown as modems 254a to 254u, where u ≥ 1), a MIMO detector 256, a receive processor 258, a data sink 260, a data source 262, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, a memory 282, and / or a communication manager 140, etc. One or more components of UE 120 may be included in housing 284. In some aspects, one or a combination of antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, or TX MIMO processor 266 may be included in a transceiver included in UE 120. The transceiver may be under the control of and used by one or more processors (such as controller / processor 280), and in some respects, may perform aspects of the methods, procedures, or operations described herein in conjunction with processor-readable code stored in memory 282. In some respects, UE 120 may include another interface, another communication component, and / or another component that facilitates communication with network node 110 and / or another UE 120.

[0075] For downlink communication from network node 110 to UE 120, the set of antennas 252 can receive downlink communication or signals from network node 110 and can provide a set of received downlink signals (e.g., R received signals) to a set of modems 254. For example, each received signal can be provided to a corresponding demodulator component (shown as DEMOD) of modem 254. Each modem 254 can use the corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain an input sample. Each modem 254 can use the corresponding demodulator component to further demodulate or process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from the set of modems 254, can perform MIMO detection on the received symbols where applicable, and can provide the detected symbols. The receiver processor 258 can process (e.g., decode) the detected symbols, provide the decoded data for the UE 120 to the data sink 260 (which may include a data pipeline, a data queue and / or an application executed on the UE 120), and provide the decoded control information and system information to the controller / processor 280.

[0076] For uplink communication from UE 120 to network node 110, the transmitting processor 264 may receive and process data (“uplink data”) from data source 262 (such as data pipelines, data queues, and / or applications running on UE 120) and control information from controller / processor 280. The control information may include one or more parameters, feedback, one or more signal measurements, and / or other types of control information. In some aspects, the receiving processor 258 and / or controller / processor 280 may determine one or more parameters related to the transmission of uplink communication for received signals (such as those received from network node 110 or another UE). One or more parameters may include a Reference Signal Received Power (RSRP) parameter, a Received Signal Strength Indicator (RSSI) parameter, a Reference Signal Received Quality (RSRQ) parameter, a CQI parameter, or a Transmit Power Control (TPC) parameter, etc. The control information may include indications of the RSRP parameter, RSSI parameter, RSRQ parameter, CQI parameter, TPC parameter, and / or another parameter. Control information can facilitate parameter selection and / or scheduling for UE 120 by network node 110.

[0077] Transmit processor 264 can generate reference symbols for one or more reference signals, such as uplink DMRS, uplink sounding reference signal (SRS), and / or another type of reference signal. Symbols from transmit processor 264 can be pre-decoded by TX MIMO processor 266 (where applicable) and further processed by an assembly of modems 254 (e.g., for DFT-s-OFDM or CP-OFDM). TX MIMO processor 266 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols (where applicable) and can provide an assembly of output symbol streams (e.g., U output symbol streams) to the assembly of modems 254. For example, each output symbol stream can be provided to a corresponding modulator component (shown as MOD) of modem 254. Each modem 254 can use the corresponding modulator component to process (e.g., modulate) the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 254 may further use a corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain an uplink signal.

[0078] Modems 254a to 254u can transmit a set of uplink signals (e.g., R uplink signals or U uplink symbols) via a set of corresponding antennas 252. Uplink signals may include UCI communication, MAC-CE communication, RRC communication, or another type of uplink communication. Uplink signals can be transmitted on PUSCH, PUCCH, and / or another type of uplink channel. Uplink signals can carry one or more TBs of data. Sidelink data and control transmission (i.e., transmission directly between two or more UEs 120) typically uses techniques similar to those described for uplink data and control transmission and may use sidelink-specific channels such as the Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH), and / or PSFCH.

[0079] One or more antennas in the set of antennas 252 or the set of antennas 234 may include one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, etc., or may be included in one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, or with one or more transmitting or receiving components (such as...) Figure 2 An antenna module is a combination of one or more antenna elements coupled to one or more components. As used herein, "antenna" can mean one or more antennas, one or more antenna panels, one or more antenna groups, one or more collections of antenna elements, or one or more antenna arrays. "Antenna panel" can mean a group of antennas (such as antenna elements) arranged in an array or panel that can facilitate beamforming by manipulating the parameters of that group of antennas. "Antenna module" can mean a circuit that includes one or more antennas, and may also include one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device.

[0080] In some examples, each antenna element of antenna 234 or antenna 252 may include one or more sub-elements for radiating or receiving radio frequency signals. For example, a single antenna element may include a first sub-element cross-polarized with a second sub-element, which can be used to independently transmit cross-polarized signals. Antenna elements may include patch antennas, dipole antennas, and / or other types of antennas arranged in a linear pattern, a two-dimensional pattern, or another pattern. The spacing between antenna elements can allow signals with a desired wavelength transmitted individually by the antenna elements to interact or interfere (e.g., to form a desired beam) in various directions. For example, given a desired wavelength or frequency range, the spacing may provide a quarter wavelength, half a wavelength, or another fraction of the wavelength between adjacent antenna elements to allow desired constructive and destructive interference modes of signals transmitted by individual antenna elements within that desired range.

[0081] The amplitude and / or phase of signals transmitted via antenna elements and / or sub-elements can be modulated and (e.g., by manipulating phase shifts, phase offsets, and / or amplitudes) shifted relative to each other to generate one or more beams; this is known as beamforming. The term "beam" can refer to the directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction. "Beam" can also generally refer to the direction associated with such directional signal transmission, the set of directional resources associated with the signal transmission (e.g., angle of arrival, horizontal direction, and / or vertical direction), and / or a set of parameters indicating one or more aspects of the directional signal, the direction associated with the signal, and / or the set of directional resources associated with the signal. In some implementations, antenna elements can be individually selected or deselected for the directional transmission of a signal (or multiple signals) by controlling the amplitude of one or more corresponding amplifiers and / or the phase of the signal to form one or more beams. The shape of the beam (such as amplitude, width, and / or the presence of sidelobes) and / or the direction of the beam (such as the angle of the beam relative to the surface of the antenna array) can be dynamically controlled by modifying the phase shifts, phase offsets, and / or amplitudes of multiple signals relative to each other.

[0082] Different UEs 120 or network nodes 110 may include different numbers of antenna elements. For example, UE 120 may include a single antenna element, two antenna elements, four antenna elements, eight antenna elements, or different numbers of antenna elements. As another example, network node 110 may include eight antenna elements, 24 antenna elements, 64 antenna elements, 128 antenna elements, or different numbers of antenna elements. Generally speaking, a larger number of antenna elements provides increased control over the parameters used for beamforming compared to a smaller number of antenna elements, while a smaller number of antenna elements may be less complex to implement and can use less power. Multiple antenna elements can support multi-layer transmission, in which the same time and frequency resources are used to utilize spatial multiplexing to transmit a first layer of communication (which may include a first data stream) and a second layer of communication (which may include a second data stream).

[0083] In some respects, the controller / processor 280 may be a component of a processing system. A processing system can typically be a system or a series of machines or components that receive input and process it to produce output (which may be passed to other systems or components, such as UE 120). For example, the processing system of UE 120 may be a system that includes various other components or sub-components of UE 120.

[0084] The processing system of UE 120 can interface with one or more other components of UE 120, and can process information (such as input or signals) received from one or more other components, or can output information to one or more other components. For example, the chip or modem of UE 120 may include a processing system, a first interface for receiving or acquiring information, and a second interface for outputting, transmitting, or providing information. In some examples, the first interface may be an interface between the processing system of the chip or modem and a receiver, allowing UE 120 to receive information or signal input and to pass information to the processing system. In some examples, the second interface may be an interface between the processing system of the chip or modem and a transmitter, allowing UE 120 to transmit information output from the chip or modem. Those skilled in the art will readily recognize that the second interface may also acquire or receive information or signal input, and the first interface may also output, transmit, or provide information.

[0085] In some respects, the controller / processor 240 may be a component of a processing system. A processing system can typically be a system or a series of machines or components that receive input and process it to produce output (which may be passed to other systems or components, such as network node 110). For example, the processing system of network node 110 may be a system that includes various other components or sub-components of network node 110.

[0086] The processing system of network node 110 may interface with one or more other components of network node 110, and may process information (such as input or signals) received from one or more other components, or may output information to one or more other components. For example, the chip or modem of network node 110 may include a processing system, a first interface for receiving or acquiring information, and a second interface for outputting, transmitting, or providing information. In some examples, the first interface may be an interface between the processing system of the chip or modem and a receiver, allowing network node 110 to receive information or signal input and to pass information to the processing system. In some examples, the second interface may be an interface between the processing system of the chip or modem and a transmitter, allowing network node 110 to transmit information output from the chip or modem. Those skilled in the art will readily recognize that the second interface may also acquire or receive information or signal input, and the first interface may also output, transmit, or provide information.

[0087] Although Figure 2 The boxes in the diagram are illustrated as different components, but the functions described above with respect to these boxes may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0088] Figure 3 This is an illustration of an example decomposed base station architecture 300 according to the present disclosure. One or more components of the example decomposed base station architecture 300 may be, may include, or may be included in one or more network nodes (such as one or more network nodes 110). The decomposed base station architecture 300 may include a CU 310, which may communicate directly with the core network 320 via a backhaul link, or may communicate indirectly with the core network 320 via one or more decomposed control units (such as non-RT RIC 350 and / or near-RT RIC 370 associated with a Service Management and Orchestration (SMO) framework 360) (e.g., via an E2 link). The CU 310 may communicate with one or more DU 330 via a corresponding midhaul link (such as via an F1 interface). Each DU 330 may communicate with one or more RU 340 via a corresponding fronthaul link. Each RU 340 may communicate with one or more UE 120 via a corresponding RF access link. In some deployments, a UE 120 may be served simultaneously by multiple RU 340s.

[0089] Each component of the disassembled base station architecture 300 (including CU 310, DU 330, RU 340, near-RT RIC 370, non-RT RIC 350, and SMO frame 360) may include one or more interfaces or may be coupled to one or more interfaces for receiving or transmitting signals, such as data or information, via wired or wireless transmission media.

[0090] In some respects, the CU 310 can be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units can communicate bidirectionally with the CU-CP units via an interface such as an E1 interface. The CU 310 can be deployed to communicate with one or more DU 330s for network control and signaling, as needed. Each DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RU 340s. For example, the DU 330 may host various layers, such as the RLC layer, MAC layer, or one or more PHY layers (such as one or more high PHY layers or one or more low PHY layers). Each layer (which may also be referred to as a module) can be implemented using an interface for signaling to other layers (and modules) hosted by the DU 330, or for signaling to control functions hosted by the CU 310. Each RU 340 may implement lower-layer functionality. In some respects, the real-time and non-real-time aspects of communication with the control plane and user plane of the RU 340 can be controlled by the corresponding DU 330.

[0091] The SMO framework 360 supports RAN deployment and provisioning for both non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO framework 360 supports the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, the SMO framework 360 can interact with cloud computing platforms such as the Open Cloud (O-Cloud) platform 390 to perform network element lifecycle management (such as instantiating virtualized network elements) via cloud computing platform interfaces such as the O2 interface. Virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 350, and / or near-RT RIC 370. In some aspects, the SMO framework 360 can communicate with hardware aspects of the 4G RAN, 5G NR RAN, and / or 6G RAN (such as the Open eNB (O-eNB) 380) via the O1 interface. Additionally or alternatively, the SMO framework 360 can communicate directly with each of one or more RUs 340 via the corresponding O1 interface. In some deployments, this configuration enables each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.

[0092] The non-RT RIC 350 may include or implement logic functions that enable non-real-time control and optimization of RAN elements and resources, including AI / ML workflows for model training and updates, and / or policy-based guidance of applications and / or features in the near-RT RIC 370. The non-RT RIC 350 may be coupled to or communicate with the near-RT RIC 370, such as via an A1 interface. The near-RT RIC 370 may include or implement logic functions that enable near real-time control and optimization of RAN elements and resources via an interface, such as an E2 interface, through data collection and actions, connecting one or more CU 310s, one or more DU 330s, and / or O-eNBs to the near-RT RIC 370.

[0093] In some aspects, to generate AI / ML models to be deployed in the near-RT RIC 370, the non-RT RIC 350 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 370 and can be received from non-network data sources or network functions at the SMO framework 360 or the non-RT RIC 350. In some examples, the non-RT RIC 350 or near-RT RIC 370 may modulate RAN behavior or performance. For example, the non-RT RIC 350 may monitor long-term trends and patterns in performance and may employ AI / ML models to perform corrective actions via the SMO framework 360 (such as reconfiguration via the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0094] Network node 110, network node 110's controller / processor 240, UE 120, UE 120's controller / processor 280, CU 310, DU 330, RU 340 or Figure 1 , Figure 2 or Figure 3 Any other component may implement one or more technologies or perform one or more operations associated with multiple PSFCH timings, as described in more detail elsewhere herein. For example, the controller / processor 240 of network node 110, the controller / processor 280 of UE 120, Figure 2 Any other component (or combination of components), CU 310, DU 330, or RU 340 may (alone or in combination with one or more other processors) perform or direct, for example Figure 7 Process 700 Figure 8 The operation of process 800 or other processes as described herein. Memory 242 may store data and program code for network node 110, CU 310, DU 330, or RU 340. Memory 282 may store data and program code for UE 120. In some examples, memory 242 or memory 282 may include a non-transitory computer-readable medium storing instruction sets (e.g., code or program code) for wireless communication. Memory 242 may include one or more memories, such as a single memory or multiple different memories (of the same or different types). Memory 282 may include one or more memories, such as a single memory or multiple different memories (of the same or different types). For example, the instruction set may be made to be executed by one or more processors of network node 110, UE 120, CU 310, DU 330, or RU 340 (e.g., directly, or after compilation, transformation, or interpretation). Figure 7 Process 700 Figure 8The process 800 or other processes as described herein. In some examples, the execution instructions may include run instructions, transform instructions, compile instructions, and / or interpret instructions, etc.

[0095] In some aspects, the first UE (e.g., UE 120) includes components for receiving configuration information indicating a set of candidate PSFCH timings, wherein the set of candidate PSFCH timings is associated with a multi-PSFCH timing conflict indication configuration, and wherein the set of candidate PSFCH timings is defined at least in part by side-link PSFCH parameter values ​​and at least one of a first time slot or a second time slot; components for receiving a first SCI indicating a first reserved resource from the second UE in the first time slot; components for receiving a second SCI indicating a second reserved resource from the third UE in the second time slot; and / or components for sending a conflict indication associated with a conflicting resource to the second UE in a selected available PSFCH timing, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one of the available PSFCH timings in the set of candidate PSFCH timings, and wherein the set of available PSFCH timings is based on the first time slot and the second time slot. Components for enabling the first UE to perform the operations described herein may include, for example, one or more of the following: communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0096] In some aspects, the second UE (e.g., UE 120) includes components for transmitting a first SCI in a first time slot, the first SCI indicating conflicting resources corresponding to sidelink resource reservations made by the third UE; and / or components for monitoring a first subset of candidate PSFCH opportunities for PSFCH communication. Components for enabling the second UE to perform the operations described herein may include one or more of, for example, a communication manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0097] Figure 4 This is a diagram illustrating example 400 of sidelink communication according to this disclosure.

[0098] like Figure 4As shown, the first UE 405-1 can communicate with the second UE 405-2 (and one or more other UEs 405) via one or more sidelink channels 410. UEs 405-1 and 405-2 can communicate using one or more sidelink channels 410 for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, and / or V2P communication), and / or mesh networking. In some aspects, UEs 405 (e.g., UEs 405-1 and / or UEs 405-2) can correspond to one or more other UEs (such as UE 120) described elsewhere herein. In some aspects, one or more sidelink channels 410 can use a PC5 interface and / or can operate in a high-frequency band (e.g., the 5.9 GHz band). Additionally or alternatively, UEs 405 can use GNSS timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, or symbols).

[0099] like Figure 4 As further shown, one or more sidelink channels 410 may include PSCCH 415, PSSCH 420, and / or PSFCH 425. PSCCH 415 may be used to transmit control information, similar to PDCCH and / or PUCCH for cellular communication with network node 110 via an access link or access channel. PSSCH 420 may be used to transmit data, similar to PDSCH and / or PUSCH for cellular communication with network node 110 via an access link or access channel. For example, PSCCH 415 may carry SCI 430, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources) that may be carried on PSSCH 420. TB 435 may include data. PSFCH 425 may be used to transmit sidelink feedback 440, such as HARQ feedback (e.g., ACK / NACK information), TPC, and / or scheduling requests (SR).

[0100] HARQ feedback provides a mechanism for informing a transmitter whether a communication has been successfully received. For example, the transmitter can send scheduling information for the communication. A receiver can monitor the resources indicated by the scheduling information to receive the communication. If the receiver successfully receives the communication, it can send an acknowledgment (ACK) in the HARQ feedback. If the receiver fails to receive the communication, it can send a negative ACK (NACK) in the HARQ feedback. 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 ACK and a second value indicates NACK. This bit may be referred to as the HARQ-ACK bit. HARQ-ACK feedback can be transmitted in a HARQ codebook, which may include one or more bits indicating ACK or NACK corresponding to one or more communications, and may be referred to as HARQ feedback information (or, in the case of sidelink communication, "sidelink HARQ feedback information").

[0101] The HARQ-ACK bit can be referred to as ACK / NACK and / or HARQ-ACK, and can be associated with the HARQ procedure. The “HARQ procedure” refers to determining whether to report an ACK or NACK associated with transmission, the time resources associated with transmission (e.g., symbols or time slots), and / or the frequency resources associated with transmission (e.g., resource blocks (RBs), sub-channels, channels, bandwidth, and / or bandwidth portions). Therefore, ACK / NACK can be interchangeably referred to as being associated with transmission, time resources, frequency resources, and / or the HARQ procedure.

[0102] Although shown on PSCCH 415, SCI 430 may, in some respects, include multiple communications at different levels, such as Level 1 SCI (SCI-1) and Level 2 SCI (SCI-2) . SCI-1 may be transmitted on PSCCH 415. SCI-2 may be transmitted on PSSCH 420. SCI-1 may include, for example, indications of one or more resources on PSSCH 420 (e.g., time resources, frequency resources, and / or spatial resources), information for decoding sidelink communications on PSSCH, Quality of Service (QoS) priority values, resource reservation periods, PSSCH DMRS modes, SCI formats for SCI-2, beta offsets for SCI-2, the number of PSSCH DMRS ports, and / or MCS. SCI-2 may include information associated with data transmission on PSSCH 420, such as HARQ process ID, New Data Indicator (NDI), source identifier, destination identifier, and / or CSI report triggering.

[0103] In some aspects, one or more sidelink channels 410 may use a resource pool. A resource pool can be defined for sidelink transmission and sidelink reception. The resource pool may include frequency domain resources (e.g., one or more subchannels or subcarriers) in the frequency domain and time domain resources (e.g., one or more time slots or other time domain resources) in the time domain. For example, the minimum resource allocation in the frequency domain may be a subchannel, and the minimum resource allocation in the time domain may be a time slot. In some aspects, one or more time slots in the resource pool may be unavailable for sidelink communication. For example, a scheduling assignment (e.g., included in SCI 430) may be transmitted across time using a specific RB in a subchannel. In some aspects, data transmissions associated with a scheduling assignment (e.g., on PSSCH 420) may (e.g., using frequency division multiplexing) occupy adjacent RBs in the same subframe as the scheduling assignment. In some aspects, the scheduling assignment and associated data transmissions are not transmitted on adjacent RBs.

[0104] In some aspects, UE 405 may operate using a sidelink transmission mode (e.g., mode 1), in which resource selection and / or scheduling is performed by network node 110 (e.g., a base station, CU, or DU). For example, UE 405 may receive permission for sidelink channel access and / or scheduling from network node 110 (e.g., permission for configuration in a DCI or RRC message). In some aspects, UE 405 may operate using a transmission mode (e.g., mode 2), in which resource selection and / or scheduling is performed by UE 405 (e.g., not by network node 110). In some aspects, UE 405 may perform resource selection and / or scheduling by sensing the availability of channels for transmission. For example, UE 405 can measure RSSI parameters (e.g., sidelink-RSSI (S-RSSI) parameters) associated with various sidelink channels, can measure RSRP parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels, and / or can measure RSRQ parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, and can select the channel for transmitting sidelink communication based at least in part on the measurements.

[0105] Alternatively or additionally, UE 405 may use the SCI 430 received in PSCCH 415 to perform resource selection and / or scheduling, which may indicate the occupied resources and / or channel parameters. Alternatively or additionally, UE 405 may perform resource selection and / or scheduling by determining the Channel Busy Ratio (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating the maximum number of resource blocks that UE 405 may use for a specific set of subframes).

[0106] In a transmission mode where resource selection and / or scheduling is performed by UE 405, UE 405 may generate sidelink grants and transmit grants in SCI 430. Sidelink grants may indicate one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks (e.g., for TB 435) to be used for an upcoming sidelink transmission on PSSCH 420, one or more subframes to be used for an upcoming sidelink transmission, and / or the MCS to be used for an upcoming sidelink transmission. In some aspects, UE 405 may generate sidelink grants indicating one or more parameters for SPS (such as the periodicity of sidelink transmission). Additionally or alternatively, UE 405 may generate sidelink grants for event-driven scheduling (such as for on-demand sidelink messages).

[0107] As shown in the figure, network node 450 can communicate with UE 405-1 and / or UE 405-2 (e.g., directly or via one or more network nodes), such as via access link 455. A direct link between UE 405-1 and UE 405-2 (e.g., via the PC5 interface) may be referred to as a sidelink, and a direct link between network node 450 and UE 405-1 or 405-2 (e.g., via the Uu interface) may be referred to as an access link. Sidelink communication can be transmitted via the sidelink, and access link communication can be transmitted via the access link. Access link communication can be downlink communication (from network node 450 to UE 405-1 or 405-2) or uplink communication (from UE 405-1 or 405-2 to network node 450).

[0108] As indicated above, Figure 4 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 4 The descriptions are different.

[0109] Some aspects described herein relate to unlicensed radio frequency spectrum bands that can be used for communications in wireless networks, such as wireless communication network 100. In some aspects, unlicensed radio spectrum bands may be used by network nodes 110 and UEs 120 of a cellular network for cellular communications (e.g., NR communications), and / or by Wi-Fi access points and Wi-Fi stations of a Wi-Fi network for Wi-Fi communications, and so on. Unlicensed radio spectrum bands may be used in combination with licensed radio spectrum bands in a cellular network or independently of them. In some examples, an unlicensed radio spectrum band may be a spectrum band that a device might need to contend for access to because that spectrum band is at least partially available for unlicensed use, such as Wi-Fi.

[0110] Before gaining access to and communicating on an unlicensed sidelink RF band, a UE may perform a Listen-Before-Speak (LBT) procedure to contend for access to that unlicensed RF band. The LBT procedure (sometimes referred to as the Idle Channel Assessment (CCA) procedure) may include performing a CCA to determine if a channel in the unlicensed sidelink RF band is available. If it is determined that a channel in the unlicensed sidelink RF band is unavailable (e.g., because another device is already using that channel), the CCA procedure may be performed again for that channel at a later time. In environments where the UE may lack access to a channel in an unlicensed sidelink RF band due to Wi-Fi activity, an extended CCA procedure may be employed to increase the likelihood that the UE will successfully contend for access to a channel in the unlicensed sidelink RF band. The extended CCA procedure involves performing a random number of CCA procedures (from 1 to q) according to an extended CCA counter.

[0111] Whether a single CCA procedure is performed or multiple CCA procedures are performed, each CCA procedure may include detecting or sensing the energy level on the channel in the unlicensed sidelink RF band and determining whether that energy level is below a threshold. When the energy level meets (e.g., is not equal to or exceeds) the threshold, the CCA procedure is considered successful, and the transmitting device can obtain access to the unlicensed channel for a duration known as Channel Occupied Time (COT), during which the transmitting device can perform transmissions without performing additional LBT operations. When the energy level does not meet the threshold, the CCA procedure is unsuccessful, and contention for access to the unlicensed channel may be considered unsuccessful.

[0112] When the CCA procedure or extended CCA procedure is successful, transmission can be performed on a channel in the unlicensed sidelink RF band. When a packet error is encountered (e.g., due to a collision in transmissions by two or more transmitters or due to poor channel conditions), a HARQ-based retransmission can be performed. In some examples, rate adaptation (e.g., at least in part based on CQI reported by the UE) can be used to modify the retransmission from the original transmission.

[0113] The LBT category defines the channel-sensing duration during which a UE contending for channel access performs a CCA procedure. The channel-sensing duration indicates the length of time the UE detects or senses the energy level on the channel to determine if that energy level is less than (or equal to) a threshold. If the energy level is less than (or equal to) the threshold, the LBT / CCA procedure succeeds, and the UE can transmit communication. If the energy level is greater than (or equal to) the threshold, the CCA procedure fails, and the UE can wait for a period of time (e.g., the backoff duration) before attempting the CCA procedure again.

[0114] In some cases, the first UE may reserve sidelink resources that conflict with those reserved by the second UE.

[0115] Figure 5 This is a diagram illustrating example 500 of a sidelink conflict according to this disclosure. Example 500 includes a first UE (shown as "UE A"), a second UE (shown as "UE0"), and a third UE (shown as "UE1"). The second UE is... Figure 5 It is also marked as "UE B". For example... Figure 5 As shown, UE0 may send a first SCI 502 indicating the reservation of a first sidelink resource, and UE1 may send a second SCI 504 indicating the reservation of a second sidelink resource. In some cases, the first sidelink resource and the second sidelink resource may conflict with each other, resulting in a scenario referred to as a conflict. In some cases, the sidelink resources involved in the conflict (e.g., the first sidelink resource and the second sidelink resource) may be referred to as "conflicting resources" 512. In some cases, the conflict (which may also be referred to as a "collision") may involve complete frequency and / or time overlap between resources (e.g., between two or more resources). Sidelink resources may conflict in the time domain and / or frequency domain. In some cases, for example, the first resource may be the second resource. Alternatively, the conflict may involve partial frequency and / or time overlap between two or more resources.

[0116] In some cases (e.g., during periods when UE A is not transmitting), UE A may provide notification services to the sidelink environment. For example, UE A may receive a first SCI 502 and a second SCI 504, and may identify conflicts between first and second sidelink resources. To facilitate more efficient resource allocation, UE A may notify UE0 and / or UE1 of the conflicts. For example, in some cases, UE A may send a conflict indication in PSFCH communication 508. UE A may send PSFCH communication 508 in a selected PSFCH timing 510.

[0117] For example, UE A may send PSFCH communication 508 to the UEs in UE0 and UE1 associated with the lowest priority transmission (e.g., a transmission corresponding to a sidelink resource reservation in SCI 1 or SCI 2, respectively). In this context, the phrase "UEs in UE0 and UE1" means that the UE is UE0 or UE1. That is, for example, UE0 may send a first SCI 502 indicating a first reservation for a first transmission, and UE1 may send a second SCI 504 indicating a second reservation for a second transmission. The first transmission may be associated with a first priority (via an indication of a first priority value), and the second transmission may be associated with a second priority (via an indication of a second priority value). The first priority may be lower than the second priority (e.g., the first priority value may be higher than the second priority value). In this way, the UE associated with the lower priority transmission may be notified of a conflict by UE A, and the notified UE may then attempt to mitigate the conflict by reserving different sidelink resources and / or dropping the transmission.

[0118] In some cases, the PSFCH timing to be used for transmitting the conflict indication (e.g., the selected PSFCH timing) can be determined based on the value of the sidelink PSFCH timing parameter (e.g., in an example implementation, the sidelink PSFCH timing parameter could be the parameter sl-PSFCH-Occasion). For example, in some cases, if the UE transmits PSFCH communication with a conflict indication corresponding to the reserved resources indicated in SCI format 1-A, the UE transmits the PSFCH communication in the resource pool in the time slot determined based on sl-PSFCH-Occasion.

[0119] In some cases, for example, the sidelink PSFCH timing parameter can be configured with a value of 0 or 1. For example, if sl-PSFCH-Occasion = "0", UE A can transmit PSFCH communication in a first time slot, which includes PSFCH resources and is at least a number of time slots provided by the first time slot in the resource pool following the time slot that provides PSCCH reception in SCI format 1-A. In some cases, the PSFCH resources are located in a time slot that is at least a number of time slots equal to a second time slot preceding the resource associated with the collision indication (e.g., collision resource 512). For example, the first time slot can be the minimum PSFCH time slot (e.g., sl-MinTimeGapPSFCH), and the second time slot can be the maximum time to complete the sensing and resource selection process (e.g., ...). Similarly, in chronological order, the first time interval precedes the second time interval in the time domain, such as... Figure 5As shown in Example 500, the selected PSFCH timing is PSFCH timing 510. In some cases, if the PSFCH resource is not in a time slot that satisfies the second time slot condition, UE A may avoid sending PSFCH communication with a conflict indication.

[0120] If sl-PSFCH-Occasion = "1", then UE A can send PSFCH communication in the latest time slot, which includes PSFCH resources and is at least several times the time slot preceding the resource pool of the resource associated with the conflict information (e.g., conflicting resource 512). The PSFCH resource is located in a time slot that is at least several time slots (e.g., sl-MinTimeGapPSFCH) following the time slot that provides PSFCH reception for SCI format 1-A; otherwise, UE A may avoid sending PSFCH communication with a collision indication. Therefore, as shown in Example 500, the selected PSFCH timing is PSFCH timing 514.

[0121] In some cases, a sidelink UE A can be configured with multiple PSFCH opportunities for sending HARQ-ACK feedback. For example, in some cases, a PSCCH / PSSCH transmission may have N associated candidate PSFCH opportunities. In some cases, for a PSCCH / PSSCH transmission, UE A can be configured to support at least the associated candidate PSFCH opportunities located in different slots within the same RB set. For example, UE A can be configured to support determining the slot index of the first PSFCH opportunity (denoted as slot k) for PSCCH / PSSCH transmission in the same manner as in legacy NR sidelinks. Then, the nth PSFCH opportunity in slot k... In some cases, P can be equal to the configured (and / or specified) PSFCH periodicity. For example, in some cases, P can be provided by the parameter sl-PSFCH-Period, where In some cases, for a PSCCH / PSSCH transmission, the PSCCH / PSSCH receiver UE (e.g., UE A) may attempt to transmit the PSFCH at a candidate PSFCH timing if and only if it failed to transmit at a previous PSFCH timing (e.g., due to LBT failure and / or due to uplink / sidelink priority, etc.).

[0122] For conflict indication, if sl-PSFCH-Occasion = "0", then UE A can be configured to transmit PSFCH in a first time slot, which includes PSFCH resources and at least several time slots of the resource pool provided by the first time slot (e.g., sl-MinTimeGapPSFCH) after the time slot providing PSCCH reception in SCI format 1-A. If sl-PSFCH-Occasion = "1", then UE A can transmit PSFCH communication in the latest time slot, which includes PSFCH resources and at least several time slots of the resource pool provided by the second time slot (e.g., sl-MinTimeGapPSFCH) before the time slot of the resource associated with the conflict information (e.g., conflict resource 512). (Several time slots provided.)

[0123] For sidelink communication over unlicensed frequency bands, multiple PSFCH opportunities can be supported for HARQ-ACK feedback to increase the probability of PSFCH transmission. However, some wireless communication standards may only allow the UE to transmit a PSFCH including a collision indication in a single PSFCH opportunity (e.g., over unlicensed frequency bands).

[0124] Some aspects of the technology described herein may generally relate to sidelink conflict indication (e.g., via unlicensed frequency bands). More specifically, some aspects of the technology may relate to multiple PSFCH timings for transmitting PSFCH communication with conflict indication. For example, in some aspects, a first UE may be configured using a set of candidate PSFCH timings associated with a multiple PSFCH timing conflict indication configuration. The set of candidate PSFCH timings may be defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot. The first UE may receive a first SCI from a second UE and a second SCI from a third UE. The first SCI and the second SCI may include conflicting sidelink resource reservations. The first UE may select a PSFCH timing for transmitting the conflict indication from the multiple PSFCH timings. For example, the first UE may select a PSFCH timing from a set of available PSFCH timings. The set of available PSFCH timings may be a subset of the set of candidate PSFCH timings and may be based on a first time slot and a second time slot.

[0125] Some examples of the described technique, by allowing the UE to select a PSFCH timing from multiple PSFCH timings, enable a sidelink UE to support multiple PSFCH timings for transmitting PSFCH communication with conflict indication. By enabling the sidelink UE to support multiple PSFCH timings for conflict indication, the described technique can be used to implement more flexible conflict indication, thereby improving the likelihood that the conflict indication can be received by the UE, and thus increasing the likelihood of mitigating sidelink resource reservation conflicts. By selecting a PSFCH timing from a set of available PSFCH timings based on a first time slot and a second time slot, some examples of the described technique can be used to enable the UE to select from multiple PSFCH timings occurring within a time period, making it more likely that the UE receiving the conflict indication will have time to mitigate the conflict, thereby improving sidelink resource allocation efficiency and thus positively impacting sidelink performance.

[0126] Figures 6A to 6E These are illustrations of examples 600, 668, 678, 684, and 690 associated with multiple PSFCH timings having conflict indications according to this disclosure. As shown, UE A 602 can communicate with UE B 604 and UE C 606 via a side link. UE A 602 can also communicate with network node 608. UEs 602, 604, and 606 can be, similar to, include, or be included in the following: Figure 5 The UE A, UE0 and UE1 depicted in the text Figure 4 UE 405-1 and / or UE 405-2 as depicted, and / or Figures 1 to 3 The UE 120 is depicted in the diagram. Network node 608 may be, similar to, include, or be included in the following: Figure 4 The network node 450 described in the text Figure 1 and Figure 2 The network node 110 depicted in the text, and / or Figure 3 One or more components of the decomposed base station architecture 300 described herein.

[0127] As indicated by reference numeral 610, network node 608 may send configuration information to UE A 602. Alternatively, the configuration information may be provided to UE A 602 by another UE. In some aspects, the configuration information may indicate a set 612 of candidate PSFCH timings. For example, as shown, the set 612 of candidate PSFCH timings may include N candidate PSFCH timings (e.g., N=4). The set 612 of candidate PSFCH timings may be associated with a multi-PSFCH timing conflict indication configuration. In some aspects, the set 612 of candidate PSFCH timings may be defined at least in part by a sidelink PSFCH parameter value (e.g., sl-PSFCH-Occasion) and at least one of a first time gap or a second time gap. The first time gap may include a minimum PSFCH time gap (e.g., sl-MinTimeGapPSFCH). The second time gap may include a maximum time for completing the sensing and resource selection process (e.g., ...). ).

[0128] In some aspects, such as Figure 6A As shown, based on the sidelink PSFCH parameter value including the first value (e.g., sl-PSFCH-Occasion="0"), the set 612 of candidate PSFCH timings can include the leftmost subset of multiple PSFCH timings 614 occurring after time period 616, which begins at first time slot 618 (e.g., the time slot in which UE B 604 transmits the first SCI 622) and has a length equal to the first time slot. "Leftmost" can refer to the earliest or first timing in the time domain, and "rightmost" can refer to the latest or last timing in the time domain. For example, if sl-PSFCH-Occasion="0", the leftmost N PSFCH timings after time slot n plus sl-MinTimeGapPSFCH can be candidate PSFCH timings, where time slot n is the time slot from which UE B 604 receives PSCCH (e.g., time slot 618). The scenario where sl-PSFCH-Occasion="1" is... Figure 6B It is described in the text and as follows.

[0129] As shown by reference numeral 620, UE B 604 may transmit a first SCI 622, and UE A 602 may receive the first SCI. The first SCI 622 may be transmitted in time slot 618 and may indicate a first reserved resource (e.g., conflicting resource 624). As shown by reference numeral 626, UE C 606 may transmit a second SCI 628, and UE A 602 may receive the second SCI. The second SCI 628 may be transmitted in time slot 630 and may indicate a second reserved resource (e.g., conflicting resource 624). While some examples may refer to time interval types (e.g., time slots), other examples may be associated with other types of time intervals (e.g., TTIs, frames, subframes, microslots, or symbols).

[0130] As indicated by reference numeral 632, UE A 602 can identify conflicts associated with the first reserved resource and the second reserved resource. As indicated by reference numeral 634, UE A 602 can select an available PSFCH timing 636 (referred to herein as the "selected available PSFCH timing") to send PSFCH communication 638 including a conflict indication associated with the conflicting resource. UE A 602 can select the available PSFCH timing 636 from a set 640 of available PSFCH timings (in the set 612 of candidate PSFCH timings).

[0131] In some respects, the set 640 of available PSFCH opportunities may include a second number (denoted as N2=2) of PSFCH opportunities. The set 640 of available PSFCH opportunities may include a subset of the set 612 of candidate PSFCH opportunities that occur after a time period that begins at both the first time slot 618 (e.g., time period 616) and the second time slot 630 (e.g., time period 642) and has a length equal to that of the first time slot, and before a time period 644 that ends at time slot 646 (denoted as "time slot n2") associated with conflicting resource 624 and has a length equal to that of the second time slot.

[0132] As indicated by reference numeral 648, UE A 602 may transmit PSFCH communication 638 including a collision indication, and UE B 604 may receive the PSFCH communication. The collision indication may be associated with collision resource 624. In some aspects, as shown in Example 600, UE A 602 may transmit PSFCH communication 638 at a selected available PSFCH time 636. PSFCH communication 638 may be transmitted using sidelink resources of the PSFCH (which may be referred to as "PSFCH resources"). For example, PSFCH resources may include one or more physical resource blocks (PRBs) of the PSFCH.

[0133] like Figure 6AAs shown, the set 612 of candidate PSFCH opportunities may be associated with the set 650 of PSFCH resources. For example, in some aspects, for each of PSFCH opportunities 660, 662, 664, and 636, the set 650 of PSFCH resources may include a first set 652 of PSFCH resources associated with a first candidate PSFCH opportunity, a second set 654 of PSFCH resources associated with a second candidate PSFCH opportunity, a third set 656 of PSFCH resources associated with a third candidate PSFCH opportunity, and a fourth set 658 of PSFCH resources associated with a fourth candidate PSFCH opportunity. For example, in some aspects, the sets 652, 654, 656, and 658 of PSFCH resources may include PRBs and may have different PSFCH resources relative to the frequency domain.

[0134] In some aspects, sets 652, 654, 656, and 658 of PSFCH resources can be indexed (e.g., using corresponding indices 1, 2, 3, and 4). UE A 602 can map PSFCH communication 638 to PSFCH resources in the sets of PSFCH resources based on the indexes. In some aspects, the index for selecting an available timing can be based on an indexing scheme associated with a set 612 of candidate PSFCH timings. In some other aspects, the index for selecting an available timing can be based on an indexing scheme associated with a set 640 of available PSFCH timings.

[0135] In some aspects, for example, the corresponding index associated with the set 612 of PSFCH timings can be determined based on the set 612 of candidate PSFCH timings. For example, in such an aspect, the first (e.g., the leftmost) PSFCH timing 660 may have index 1 and can be mapped to a PSFCH resource (index 1) in the set 652 of PSFCH resources; the second PSFCH timing 662 may have index 2 and can be mapped to a PSFCH resource (index 2) in the set 654 of PSFCH resources; the third PSFCH timing 664 may have index 3 and can be mapped to a PSFCH resource (index 3) in the set 656 of PSFCH resources; and the PSFCH timing 636 may have index 4 and can be mapped to a PSFCH resource (index 4) in the set 658 of PSFCH resources. Therefore, in order to send PSFCH communication 638 in PSFCH timing 636, UE A 602 may map PSFCH communication 638 to one of the PSFCH resources (index 4) in the set 658 of PSFCH resources in PSFCH timing 636.

[0136] In some other aspects, for example, the corresponding index associated with the set 612 of PSFCH timings can be determined based on the set 640 of available PSFCH timings. For example, PSFCH timing 664 may have index 1 and can be mapped to a PSFCH resource (index 1) in the set 652 of PSFCH resources, and PSFCH timing 636 may have index 2 and can be mapped to a PSFCH resource (index 2) in the set 654 of PSFCH resources. Therefore, as shown, in order to send PSFCH communication 666 in PSFCH timing 664, UE A 602 may map PSFCH communication 666 to a PSFCH resource in the set 652 of PSFCH resources in PSFCH timing 664.

[0137] Figure 6B This is a diagram illustrating example 668, where the sidelink PSFCH parameter value has a second value (e.g., sl-PSFCH-Occasion="1"). As shown, the set 670 of candidate PSFCH opportunities may include the rightmost subset of multiple PSFCH opportunities 614 occurring before time period 644 based on the sidelink PSFCH parameter value including the second value. In the illustrated example 668, the set 670 of candidate PSFCH opportunities includes four PSFCH opportunities (N=4). For example, as shown, the set 670 of candidate PSFCH opportunities includes PSFCH opportunities 672 and 674, instead of including PSFCH opportunities 660 and 662. In example 668, the set 676 of available PSFCH opportunities may include a second number (e.g., N2=2) of PSFCH opportunities. The set 676 of available PSFCH opportunities may include a subset of the set 670 of candidate PSFCH opportunities that occur before time slot 644 and after time slots 616 or 642 that begin with both first time slot 618 and second time slot 630 and have a length equal to that of the first time slot. The PSFCH resource mapping in example 668 may be combined with the above, depending on various aspects. Figure 6A Similar to the description in Example 600.

[0138] In some aspects, UE A 602 may attempt to send PSFCH communication on N2 available PSFCH opportunities. For example, UE A 602 may attempt to send PSFCH communication on several first N2 PSFCH opportunities, and when UE A 602 fails to send a PSFCH with a conflict indication in all previous PSFCH opportunities, UE A 602 may attempt to send PSFCH communication in a time slot. In some aspects, for example, UE A 602 may skip at least one candidate PSFCH opportunity in the set of PSFCH opportunities that have not met the timeline, and may attempt to send a conflict indication in at least one available PSFCH opportunity that occurs after the first subset of the set of available PSFCH opportunities, based on the failure to send a conflict indication in the first subset of the set of available PSFCH opportunities. As used herein, a non-satisfied timeline may include a candidate PSFCH opportunity within time slot n1 plus the minimum PSFCH time gap (e.g., sl-MinTimeGapPSFCH), or within time slot n2 minus T3, where time slot n2 is the time slot of the conflicting resource. In some aspects, a non-satisfied timeline may be associated with at least one candidate PSFCH opportunity within a time period that begins in at least one of the first or second time slots (e.g., begins in the later of the first or second time slot) and has a length equal to the first time slot. In some aspects, a non-satisfied timeline may be associated with at least one candidate PSFCH opportunity within a time period that ends in the time slot associated with the conflicting resource and has a length equal to the second time slot.

[0139] For example, such as Figure 6C As shown in Example 678, where sl-PSFCH-Occasion="0", UE A 602 may attempt to send PSFCH communication with a conflict indication in the first and second PSFCH timestamps, which include the set 680 of candidate PSFCH timestamps, but UE A 602 may fail (as indicated by "X" in the figure). The first and second PSFCH timestamps may correspond to the set 682 of available PSFCH timestamps. In some respects, UE A 602 may avoid sending PSFCH communication in the third and fourth PSFCH timestamps because the third and fourth PSFCH timestamps are within the T3 time slot preceding the time slot of resource 624 associated with the conflict indication.

[0140] like Figure 6DAs shown in Example 684, where sl-PSFCH-Occasion="1", UE A 602 can avoid sending PSFCH communication including a conflict indication in the first and second PSFCH times within the set 686 of candidate PSFCH times, because the first and second PSFCH times are within n1+sl-MinTimeGapPSFCH, where time slot n1 is the time slot of the first SCI or the second SCI. UE A 602 may attempt to send PSFCH communication in the third PSFCH time (e.g., the first PSFCH time in the set 686 of available PSFCH times) but fail (as indicated by "X"), and UE A 602 may send PSFCH communication in the fourth PSFCH time. The third and fourth PSFCH times may correspond to the set 688 of available PSFCH times.

[0141] In some aspects, UE B 604 may monitor a first subset of the set of candidate PSFCH opportunities for PSFCH communication. In some aspects, for example, UE B 604 may detect PSFCH communication associated with a conflicting resource within a first candidate PSFCH opportunity in the first subset of candidate PSFCH opportunities. UE B 604 may avoid monitoring a second subset of the set of candidate PSFCH opportunities in connection with detecting PSFCH communication associated with a conflicting resource. In some aspects, for example, the second subset of candidate PSFCH opportunities may include one or more candidate PSFCH opportunities occurring after the first candidate PSFCH opportunity. In some aspects, UE B 604 may monitor a first subset of candidate PSFCH opportunities in connection with a first subset of candidate PSFCH opportunities occurring before a time period that ends at a time slot associated with a conflicting resource and has a length equal to the time slot.

[0142] In some aspects, in addition to the set of candidate PSFCH timings used for conflict indication, UE A 602 may also utilize an additional set of candidate PSFCH timings used for HARQ-ACK feedback for configuration. In some aspects, the set of candidate PSFCH timings may be a subset of the additional set of PSFCH timings. In some aspects, the set of candidate PSFCH timings may include a first number of PSFCH timings, and the additional set of candidate PSFCH timings may include a second number of PSFCH timings. In some aspects, the second number may be less than or equal to the first number.

[0143] For example, such as Figure 6EAs shown in Example 690, an additional set 692 of PSFCH timings may be associated with a first SCI 622. In some aspects, an additional set 694 of PSFCH timings may be associated with an SCI of either the first SCI 622 or the second SCI 628, wherein the destination of the SCI is UE A 602. In some aspects, UE A 602 may receive configuration information indicating a set 612 of candidate PSFCH timings in association with the destination of the first SCI 622 being UE A 602. In some aspects, UE A 602 may receive configuration information indicating a set 612 of candidate PSFCH timings in association with the sidelink type associated with UE A 602 (e.g., sl-Type UE-A) being disabled.

[0144] For example, in some aspects, if N 1,max One PSFCH timing is configured for PSFCH with HARQ-ACK feedback, N 2,max N2 candidate PSFCH timings can be configured for PSFCHs with conflict indication, and UE A 602 may expect the N2 candidate PSFCH timings used for conflict indication to share a subset of the N1 candidate PSFCH timings used for HARQ-ACK feedback. In some aspects, the maximum number N PSFCH timings configured for conflict indication is... 2,max The maximum number N of PSFCH timings for the HARQ-ACK configuration may not exceed [the maximum number of timings]. 1,max In some respects, the N1 candidate PSFCH timings can be associated with the SCI of UE B 604. In some respects, the N1 candidate PSFCH timings can be associated with the SCI of the destination UE being UE A 602.

[0145] In some aspects, UE A 602 may receive a first SCI 622 on a first RB set and may transmit PSFCH communication including a conflict indication on the first RB set in association with a second SCI 628 indicating a conflicting resource 624. For example, in some aspects, for a PSFCH with HARQ-ACK feedback, the PSFCH may be transmitted on the same RB set as the associated PSCCH / PSSCH. For a PSFCH with a conflict indication, UE A 602 may receive two corresponding SCIs indicating conflicting resources. In this case, if UE A 602 transmits PSFCH communication with a conflict indication to UE B 604 in response to receiving a first SCI 622 from UE B 604 and a second SCI 628 from UE C 606, where the first SCI 622 and the second SCI 628 indicate conflicting resource 624, the PSFCH communication may be transmitted on the same RB set on which the first SCI 622 is received.

[0146] As indicated above, Figures 6A to 6E Provided as an example. Other examples may be provided relative to... Figures 6A to 6E The descriptions are different.

[0147] Figure 7 This is a diagram illustrating an example process 700 performed, for example, at a UE or a device of a UE, according to this disclosure. Example process 700 is an example in which a device or UE (e.g., UE A 602) performs operations associated with techniques for multiple PSFCH timings for a PSFCH with a conflict indication.

[0148] like Figure 7 As shown, in some aspects, process 700 may include receiving configuration information indicating a set of candidate PSFCH timings, and wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot (block 710). For example, the UE (e.g., using...) Figure 9 The receiving component 902 and / or communication manager 906 depicted herein may receive configuration information indicating a set of candidate PSFCH timings, wherein the set of candidate PSFCH timings is defined at least in part by side-link PSFCH parameter values ​​and at least one of a first time slot or a second time slot, as described above.

[0149] like Figure 7 As further shown, in some aspects, process 700 may include receiving a first SCI (block 720) indicating a first reserved resource from a second UE in a first time slot. For example, the UE (e.g., using...) Figure 9 The receiving component 902 and / or communication manager 906 depicted herein may receive a first SCI indicating a first reserved resource from the second UE in a first time slot, as described above. The first reserved resource may be used for a first transmission (by the second UE) associated with a first priority (via an indication of a first priority value).

[0150] like Figure 7 Further shown, in some aspects, process 700 may include receiving a second SCI (block 730) indicating a second reserved resource from a third UE in a second time slot. For example, the UE (e.g., using...) Figure 9 The receiving component 902 and / or communication manager 906 depicted herein may receive a second SCI indicating a second reserved resource from the third UE in a second time slot, as described above. The second reserved resource may be used for a second transmission (by the third UE) associated with a second priority (via an indication of a second priority value). The second priority may be higher than the first priority (e.g., the first priority value is lower than the second priority value).

[0151] like Figure 7 Further shown, in some aspects, process 700 may include sending a conflict indication associated with a conflicting resource to a second UE during a selected available PSFCH timing, wherein the conflicting resource corresponds to a first reserved resource, wherein the selected available PSFCH timing is one of a set of available PSFCH timings from a set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on a first time slot and a second time slot (box 740). For example, the UE (e.g., using...) Figure 9 The transmitting component 904 and / or communication manager 906 depicted herein can transmit a conflict indication associated with a conflicting resource to a second UE in a selected available PSFCH timing, wherein the conflicting resource corresponds to a first reserved resource, wherein the selected available PSFCH timing is one of a set of available PSFCH timings from a set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on a first time slot and a second time slot, as described above. In this way, the UE associated with lower priority transmission (e.g., Figure 7 The second UE in the context may be notified of the conflict by the device or UE (e.g., UE A602), and the notified UE may attempt to mitigate the conflict by reserving different sidelink resources and / or dropping the associated transmissions.

[0152] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere in this document.

[0153] In the first aspect, the first time gap includes the minimum PSFCH time gap.

[0154] In a second aspect, either alone or in combination with the first aspect, the second time interval includes the maximum time for completing the sensing and resource selection process.

[0155] In a third aspect, either alone or in combination with one or more of the first and second aspects, based on the sidelink PSFCH parameter value including the first value and the second value, the set of candidate PSFCH timings includes the leftmost subset of multiple PSFCH timings occurring after a time period that begins at the first time slot and has a length equal to the first time slot, and the set of candidate PSFCH timings includes a first number of PSFCH timings.

[0156] In the fourth aspect, alone or in combination with the third aspect, the set of available PSFCH timings includes a second number of PSFCH timings, and the set of available PSFCH timings includes a subset of the set of candidate PSFCH timings that occur after a time period that begins at both the first and second time slots and has a length equal to that of the first time slot, and before a time period that ends at the time slot associated with the conflicting resource and has a length equal to that of the second time slot.

[0157] In the fifth aspect, either alone or in combination with one or more of the first and second aspects, based on the sidelink PSFCH parameter value including the second value of the first and second values, the set of candidate PSFCH timings includes the rightmost subset of multiple PSFCH timings that occurred before a time period that ends at a time slot associated with the conflicting resource and has a length equal to the second time slot, and the set of candidate PSFCH timings includes a first number of PSFCH timings.

[0158] In the sixth aspect, alone or in conjunction with the fifth aspect, the set of available PSFCH opportunities includes a second number of PSFCH opportunities, and the set of available PSFCH opportunities includes a subset of the set of candidate PSFCH opportunities that occur: before a time period ending at a time slot associated with the conflicting resource and having a length equal to the second time slot, and after a time period beginning at both the first time slot and the second time slot and having a length equal to the first time slot.

[0159] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 700 includes skipping at least one candidate PSFCH timing in the set of candidate PSFCH timings based on a timeline not being met; and, based on the failure to send the conflict indication in a first subset of the set of available PSFCH timings, attempting to send the conflict indication in at least one available PSFCH timing in the set of available PSFCH timings that occurs after the first subset.

[0160] In the eighth aspect, alone or in combination with the seventh aspect, the timeline does not satisfy the association with the at least one candidate PSFCH timing during a time period that begins in at least one of the first time slot or the second time slot and has a length equal to that of the first time slot.

[0161] In the ninth aspect, either alone or in combination with one or more of the seventh or eighth aspects, the unmet timeline is associated with the at least one candidate PSFCH timing within a time period ending in a time slot associated with the conflicting resource and having a length equal to that of the second time slot.

[0162] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, sending the conflict indication includes sending the conflict indication according to a mapped PSFCH resource, wherein the mapped PSFCH resource is associated with an index of the selected available PSFCH timing.

[0163] In the eleventh aspect, either alone or in conjunction with the tenth aspect, the index of the selected available PSFCH timing is based on an indexing scheme associated with the set of candidate PSFCH timings.

[0164] In the twelfth aspect, alone or in conjunction with the tenth aspect, the index of the selected available PSFCH timings is based on an indexing scheme associated with the set of available PSFCH timings.

[0165] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the configuration information indicates a first number of PSFCH timings associated with the set of candidate PSFCH timings, and process 700 includes receiving additional configuration information indicating an additional set of PSFCH timings, the additional set of PSFCH timings having a second number of PSFCH timings and associated with HARQ-ACK feedback.

[0166] In the fourteenth aspect, alone or in conjunction with the thirteenth aspect, the set of candidate PSFCH timings is a subset of the additional set of PSFCH timings.

[0167] In the fifteenth aspect, alone or in combination with one or more of the thirteenth to fourteenth aspects, the second quantity is less than or equal to the first quantity.

[0168] In the sixteenth aspect, alone or in combination with one or more aspects from the thirteenth to the fifteenth aspect, this additional set of PSFCH timings is associated with the first SCI.

[0169] In the seventeenth aspect, alone or in combination with one or more of the thirteenth to sixteenth aspects, the additional set of PSFCH timings is associated with an SCI in the first SCI or the second SCI, wherein the destination of the SCI is the first UE.

[0170] In the eighteenth aspect, alone or in combination with the seventeenth aspect, receiving the configuration information of the set indicating the timing of candidate PSFCHs includes receiving the configuration information in association with the destination of the first SCI being the first UE.

[0171] In the nineteenth aspect, receiving the configuration information alone or in combination with the eighteenth aspect includes receiving the configuration information in connection with the side link type associated with the first UE being disabled.

[0172] In the twentieth aspect, receiving the first SCI, either alone or in combination with one or more of the first to nineteenth aspects, includes receiving the first SCI on the first RB set, and sending the conflict indication includes sending the conflict indication on the first RB set in association with the second SCI indicating the conflicting resource.

[0173] although Figure 7 An example box of process 700 is shown, but in some respects, process 700 may include... Figure 7 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in the process 700 may be executed in parallel.

[0174] Figure 8 This is a diagram illustrating an example process 800 performed, for example, at a UE or a device of a UE, according to this disclosure. Example process 800 is an example in which a device or UE (e.g., UE B 604) performs operations associated with techniques for multiple PSFCH timings for a PSFCH with a conflict indication.

[0175] like Figure 8 As shown, in some aspects, process 800 may include transmitting a first SCI in a first time slot, the first SCI indicating conflicting resources corresponding to sidelink resource reservations made by a third UE (block 810). For example, the UE (e.g., using...) Figure 9 The transmitting component 904 and / or communication manager 906 depicted herein may transmit a first SCI in a first time slot, the first SCI indicating conflicting resources corresponding to sidelink resource reservations made by a third UE, as described above.

[0176] like Figure 8 Further shown, in some aspects, process 800 may include monitoring a first subset (box 820) of a set of candidate PSFCH opportunities for PSFCH communication. For example, the UE (e.g., using...) Figure 9 The communication manager 906 depicted in the text can monitor a first subset of the set of candidate PSFCH opportunities for PSFCH communication, as described above.

[0177] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0178] In a first aspect, process 800 includes detecting PSFCH communication associated with the conflicting resource in a first candidate PSFCH timing within the first subset of candidate PSFCH timings, and avoiding monitoring a second subset of candidate PSFCH timings in connection with detecting the PSFCH communication associated with the conflicting resource, wherein the second subset of candidate PSFCH timings includes one or more candidate PSFCH timings occurring after the first candidate PSFCH timing.

[0179] In the second aspect, either alone or in combination with the first aspect, the first subset of monitoring candidate PSFCH timings includes monitoring the first subset of candidate PSFCH timings that occurred prior to a time period ending at a time slot associated with the conflicting resource and having a length equal to the time slot.

[0180] In the third aspect, either alone or in combination with the second aspect, the time gap includes the maximum time required to complete the sensing and resource selection process.

[0181] although Figure 8 An example box of process 800 is shown, but in some respects, process 800 may include... Figure 8 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in the process 800 may be executed in parallel.

[0182] Figure 9 This is a diagram illustrating an example device 900 for wireless communication according to the present disclosure. Device 900 may be a UE, or a UE may include device 900. In some aspects, device 900 includes a receiving component 902, a transmitting component 904, and / or a communication manager 906 that can communicate with each other (e.g., via one or more buses and / or one or more other components). In some aspects, the communication manager 906 is combined with... Figure 1 The described communication manager 140. As shown, device 900 can communicate with another device 908 (such as a UE or a network node (such as a CU, DU, RU or base station)) using receiving component 902 and transmitting component 904.

[0183] In some respects, device 900 can be configured to perform the functions described herein. Figures 6A to 6E One or more operations described herein. Additionally or alternatively, device 900 may be configured to perform one or more processes described herein, such as Figure 7 Process 700 and / or Figure 8 The process is 800. In some respects, Figure 9The illustrated device 900 and / or one or more components may include a combination Figure 2 One or more components of the described UE. Additionally or alternatively, Figure 9 One or more components shown can be combined Figure 2 Implementation within one or more of the described components. Additionally or alternatively, one or more components in the set of components may be implemented at least partially as software stored in one or more memories. For example, a component (or a portion thereof) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the function or operation of the component.

[0184] Receiver 902 may receive communications from device 908, such as reference signals, control information, data communications, or combinations thereof. Receiver 902 may provide the received communications to one or more other components of device 900. In some aspects, receiver 902 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.), and may provide the processed signals to one or more other components of device 900. In some aspects, receiver 902 may include combinations of... Figure 2 The described UE includes one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receiver processors, one or more controllers / processors, one or more memories, or combinations thereof.

[0185] Transmitting component 904 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 908. In some aspects, one or more other components of device 900 can generate communications and provide the generated communications to transmitting component 904 for transmission to device 908. In some aspects, transmitting component 904 can perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to device 908. In some aspects, transmitting component 904 may include combinations of... Figure 2 The described UE may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or combinations thereof. In some aspects, the transmit component 904 may co-located with the receive component 902 in one or more transceivers.

[0186] The communication manager 906 may support the operation of the receiving component 902 and / or the transmitting component 904. For example, the communication manager 906 may receive information associated with configuring the reception of communications by the receiving component 902 and / or the transmission of communications by the transmitting component 904. Additionally or alternatively, the communication manager 906 may generate control information and / or provide control information to the receiving component 902 and / or the transmitting component 904 to control the reception and / or transmission of communications.

[0187] The receiving component 902 can receive configuration information indicating a set of candidate PSFCH timings, wherein the set of candidate PSFCH timings is associated with a multi-PSFCH timing conflict indication configuration, and wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot. The receiving component 902 can receive a first SCI indicating a first reserved resource from a second UE in a first time slot. The receiving component 902 can receive a second SCI indicating a second reserved resource from a third UE in a second time slot. The transmitting component 904 can transmit a conflict indication associated with a conflicting resource to the second UE in a selected available PSFCH timing, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one of the available PSFCH timings in the set of candidate PSFCH timings, and wherein the set of available PSFCH timings is based on a first time slot and a second time slot.

[0188] The communication manager 906 can skip at least one candidate PSFCH timing from the set of candidate PSFCH timings based on the timeline not being met.

[0189] The communication manager 906 may attempt to send a collision indication in at least one available PSFCH moment that occurs after the first subset of the set of available PSFCH moments, based on the failure to send a collision indication in the first subset of the set of available PSFCH moments.

[0190] Transmitting component 904 may transmit a first SCI in a first timeslot, the first SCI indicating a conflicting resource corresponding to a sidelink resource reservation performed by a third UE. Communication manager 906 may monitor a first subset of candidate PSFCH opportunities for PSFCH communication.

[0191] The communication manager 906 can detect PSFCH communications associated with conflicting resources in the first candidate PSFCH timing of the first subset of candidate PSFCH timings.

[0192] The communication manager 906 may, in association with the detection of PSFCH communications associated with conflicting resources, avoid monitoring a second subset of the set of candidate PSFCH timings, wherein the second subset of candidate PSFCH timings includes one or more candidate PSFCH timings that occur after the first candidate PSFCH timing.

[0193] Figure 9 The number and arrangement of components shown are provided as an example. In practice, different arrangements may exist. Figure 9 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 9 The two or more components shown can be implemented within a single component, or Figure 9 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 9 The collection of (one or more) components shown is executable and described as being composed of Figure 9 Another set of components shown performs one or more functions.

[0194] The following provides an overview of some aspects of this disclosure:

[0195] Aspect 1: A method of wireless communication performed by a first user equipment (UE), the method comprising: receiving configuration information indicating a set of candidate physical sidelink feedback shared channel (PSFCH) opportunities, wherein the set of candidate PSFCH opportunities is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot; receiving first sidelink control information (SCI) indicating a first reserved resource from a second UE in a first time slot; receiving a second SCI indicating a second reserved resource from a third UE in a second time slot; and transmitting a conflict indication associated with a conflicting resource to the second UE in a selected available PSFCH opportunity, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH opportunity is one of the available PSFCH opportunities in the set of candidate PSFCH opportunities, wherein the set of available PSFCH opportunities is based on the first time slot and the second time slot.

[0196] Aspect 2: According to the method of aspect 1, the first time gap includes a minimum PSFCH time gap.

[0197] Aspect 3: The method according to any one of Aspect 1 or 2, wherein the second time interval includes a maximum time for completing the sensing and resource selection process.

[0198] Aspect 4: The method according to any one of Aspects 1 to 3, wherein, based on the side-link PSFCH parameter value including the first value of a first value and a second value, the set of candidate PSFCH timings includes the leftmost subset of a plurality of PSFCH timings occurring after a time period that begins at the first time slot and has a length equal to the first time slot, and wherein the set of candidate PSFCH timings includes a first number of PSFCH timings.

[0199] Aspect 5: According to the method of aspect 4, wherein the set of available PSFCH opportunities includes a second number of PSFCH opportunities, and wherein the set of available PSFCH opportunities includes a subset of the set of candidate PSFCH opportunities that occur after a time period that begins at both the first time slot and the second time slot and has a length equal to the first time slot, and before a time period that ends at the time slot associated with the conflicting resource and has a length equal to the second time slot.

[0200] Aspect 6: The method according to any one of Aspects 1 to 3, wherein, based on the sidelink PSFCH parameter value including the second value of the first value and the second value, the set of candidate PSFCH timings includes the rightmost subset of a plurality of PSFCH timings occurring before a time period, the time period ending at a time slot associated with the conflicting resource and having a length equal to the second time slot, and wherein the set of candidate PSFCH timings includes a first number of PSFCH timings.

[0201] Aspect 7: According to the method of aspect 6, wherein the set of available PSFCH opportunities includes a second number of PSFCH opportunities, and wherein the set of available PSFCH opportunities includes a subset of the set of candidate PSFCH opportunities that occur: before a time period ending at a time slot associated with the conflicting resource and having a length equal to the second time slot, and after a time period beginning at both the first time slot and the second time slot and having a length equal to the first time slot.

[0202] Aspect 8: The method according to any one of Aspects 1 to 7, the method further comprising: skipping at least one candidate PSFCH timing in the set of candidate PSFCH timings based on the failure to meet the timeline; and, based on the failure to send the conflict indication in a first subset of the set of available PSFCH timings, attempting to send the conflict indication in at least one available PSFCH timing in the set of available PSFCH timings that occurs after the first subset.

[0203] Aspect 9: According to the method of aspect 8, the failure to satisfy the timeline is associated with at least one candidate PSFCH timing within a time period that begins in at least one of the first time slot or the second time slot and has a length equal to that of the first time slot.

[0204] Aspect 10: The method according to any one of Aspects 8 or 9, wherein the failure to satisfy the timeline is associated with the at least one candidate PSFCH timing within a time period ending in a time slot associated with the conflicting resource and having a length equal to the second time slot.

[0205] Aspect 11: The method according to any one of Aspects 1 to 10, wherein sending the conflict indication includes sending the conflict indication according to a mapped PSFCH resource, wherein the mapped PSFCH resource is associated with an index of the selected available PSFCH timing.

[0206] Aspect 12: According to the method of aspect 11, wherein the index of the selected available PSFCH timing is based on an indexing scheme associated with the set of candidate PSFCH timings.

[0207] Aspect 13: The method according to any one of Aspects 11 to 12, wherein the index of the selected available PSFCH timing is based on an indexing scheme associated with the set of available PSFCH timings.

[0208] Aspect 14: The method according to any one of Aspects 1 to 13, wherein the configuration information indicates a first number of PSFCH timings associated with the set of candidate PSFCH timings, the method further comprising: receiving additional configuration information indicating an additional set of PSFCH timings, the additional set of PSFCH timings having a second number of PSFCH timings and associated with a Hybrid Automatic Repeat Request (HARQ)-Acknowledgement (ACK) (HARQ-ACK) feedback.

[0209] Aspect 15: The method according to aspect 14, wherein the set of candidate PSFCH timings is a subset of the additional set of PSFCH timings.

[0210] Aspect 16: The method according to any one of Aspects 14 or 15, wherein the second quantity is less than or equal to the first quantity.

[0211] Aspect 17: The method according to any one of Aspects 14 to 16, wherein the additional set of PSFCH timings is associated with the first SCI.

[0212] Aspect 18: The method according to any one of Aspects 14 to 17, wherein the additional set of PSFCH timings is associated with an SCI in the first SCI or the second SCI, wherein the destination of the SCI is the first UE.

[0213] Aspect 19: According to the method of aspect 18, wherein receiving the configuration information of the set indicating the timing of candidate PSFCH includes receiving the configuration information in association with the destination of the first SCI being the first UE.

[0214] Aspect 20: According to the method of aspect 19, receiving the configuration information includes receiving the configuration information in association with the side link type associated with the first UE being disabled.

[0215] Aspect 21: The method according to any one of Aspects 1 to 20, wherein receiving the first SCI includes receiving the first SCI on a first resource block (RB) set, and wherein sending the conflict indication includes sending the conflict indication on the first RB set in association with the second SCI indicating the conflicting resource.

[0216] Aspect 22: A method of wireless communication performed by a second user equipment (UE), the method comprising: transmitting first sidelink control information (SCI) in a first time slot, the first SCI indicating conflicting resources corresponding to sidelink resource reservations performed by a third UE; and monitoring a first subset of candidate PSFCH timings of a set of candidate PSFCH timings for physical sidelink feedback channel (PSFCH) communication.

[0217] Aspect 23: The method according to aspect 22, the method further comprising: detecting PSFCH communication associated with the conflicting resource in a first candidate PSFCH timing within a first subset of the candidate PSFCH timings; and avoiding monitoring a second subset of the set of candidate PSFCH timings in connection with detecting the PSFCH communication associated with the conflicting resource, wherein the second subset of candidate PSFCH timings includes one or more candidate PSFCH timings occurring after the first candidate PSFCH timing.

[0218] Aspect 24: The method according to any one of Aspects 22 or 23, wherein the first subset of monitoring candidate PSFCH timings includes monitoring the first subset of candidate PSFCH timings in association with the first subset of candidate PSFCH timings that occurred a time period prior to a time period ending at a time slot associated with the conflicting resource and having a length equal to the time slot.

[0219] Aspect 25: According to the method of aspect 24, the time interval includes a maximum time for completing the sensing and resource selection process.

[0220] Aspect 26: An apparatus for wireless communication at a device, the apparatus comprising: one or more processors; one or more memories coupled to the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method according to one or more of aspects 1 to 21.

[0221] Aspect 27: An apparatus for wireless communication at a device, the apparatus comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors being configured to cause the device to perform the method according to one or more of aspects 1 to 21.

[0222] Aspect 28: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 1 to 21.

[0223] Aspect 29: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by one or more processors to perform the method according to one or more of aspects 1 to 21.

[0224] Aspect 30: 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 according to one or more of aspects 1 to 21.

[0225] Aspect 31: A device for wireless communication, the device including a processing system comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the device to perform the method according to one or more of aspects 1 to 21.

[0226] Aspect 32: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors being individually or collectively configured to cause the device to perform the method according to one or more of aspects 1 to 21.

[0227] Aspect 33: An apparatus for wireless communication at a device, the apparatus comprising: one or more processors; one or more memories coupled to the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method according to one or more of aspects 22 to 25.

[0228] Aspect 34: An apparatus for wireless communication at a device, the apparatus comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors being configured to cause the device to perform the method according to one or more of aspects 22 to 25.

[0229] Aspect 35: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 22 to 25.

[0230] Aspect 36: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by one or more processors to perform the method according to one or more of aspects 22 to 25.

[0231] Aspect 37: 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 according to one or more of aspects 22 to 25.

[0232] Aspect 38: A device for wireless communication, the device including a processing system comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the device to perform the method according to one or more of aspects 22 to 25.

[0233] Aspect 39: An apparatus for wireless communication at a device, the apparatus comprising: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors being individually or collectively configured to cause the device to perform the method according to one or more of aspects 22 to 25.

[0234] While the foregoing disclosure provides examples and descriptions, it is not intended to be exhaustive or to limit aspects to the precise forms disclosed. Modifications and variations can be made based on the foregoing disclosure, or from various aspects of practice.

[0235] As used herein, the term "component" is intended to be interpreted broadly as hardware, firmware, or a combination of hardware and software. As used herein, a processor is implemented as hardware, firmware, or a combination of hardware and software. As used herein, the phrase "based on" is intended to be interpreted broadly as "at least partially based on". As used herein, depending on the context, "meeting a threshold" can refer to a value greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc. As used herein, the phrase referring to "at least one of" a list of items refers to any combination of these items, including a single member. 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.

[0236] Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more”. Furthermore, as used herein, the article “the” is intended to include one or more items mentioned in connection with the article “the” and is interchangeable with “one or more”. Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and are interchangeable with “one or more”. If only one item is desired, the phrase “only one” or similar terms will be used. Moreover, as used herein, the terms “having” and similar terms are intended to be open-ended terms that do not limit the elements they modify (e.g., an element “having” A may also have B). Furthermore, as used herein, the term “or” when used in a sequence is intended to be inclusive and is interchangeable with “and / or” unless otherwise explicitly stated (e.g., in conjunction with “either of” or “only one of”).

[0237] The various exemplary logic components, logic blocks, modules, circuits, and algorithmic processes described in conjunction with the aspects disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. The interchangeability of hardware and software has been generally described in terms of functionality and illustrated in the various exemplary components, blocks, modules, circuits, and processes described herein. Whether such functionality is implemented in hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0238] Hardware and data processing means for implementing the various exemplary logic, logic blocks, modules, and circuits described herein can be implemented or executed using general-purpose single-chip or multi-chip processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor can be a microprocessor, or any conventional processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration. In some aspects, specific processes and methods can be performed by circuitry dedicated to a given function.

[0239] In one or more aspects, the described functionality may be implemented in hardware, digital electronic circuits, computer software, firmware, including the structures disclosed in this specification and their structural equivalents or any combination thereof. Aspects of the subject matter described in this specification may also be implemented as one or more computer programs (such as one or more modules of computer program instructions) encoded on a computer storage medium for execution by or control of the operation of a data processing apparatus.

[0240] If implemented in software, the functionality can be stored as one or more instructions or code on or transmitted through a computer-readable medium. The processes of the methods or algorithms disclosed herein can be implemented in a processor-executable software module that can reside on a computer-readable medium. Computer-readable media include both computer storage media and communication media, with communication media including any medium capable of transferring a computer program from one place to another. Storage media can be any available medium accessible to a computer. By way of example, and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage devices, disk storage devices or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and is accessible to a computer. Furthermore, any connection may be properly referred to as a computer-readable medium. As used herein, disks and optical discs include compact optical discs (CDs), laser discs, optical discs, digital versatile optical discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical discs reproduce data optically using lasers. Combinations of media described herein should also be included within the scope of computer-readable media. Additionally, the operation of a method or algorithm may reside as a set of code and instructions or any combination of code and instructions on a machine-readable medium and a computer-readable medium that may be incorporated into a computer program product.

[0241] Various modifications to the aspects described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the spirit or scope of this disclosure. Therefore, the claims are not intended to be limited to the aspects shown herein, but are to be granted the widest scope consistent with this disclosure, the principles disclosed herein, and the novel features.

[0242] Additionally, those skilled in the art will readily recognize that the terms “upper” and “lower” are sometimes used to facilitate the description of the drawings and to indicate relative positions on a correctly oriented page corresponding to the orientation of the drawings, and may not reflect the correct orientation of any device as implemented.

[0243] Some features described in the context of an independent aspect in this specification may also be implemented in combination in a single aspect. Conversely, various features described in the context of a single aspect may also be implemented individually or in any suitable sub-combination in multiple aspects. Furthermore, although features may be described as functioning in certain combinations and even originally claimed in this way, one or more features from the claimed combination may be removed from that combination in some cases, and the claimed combination may be for sub-combinations or variations thereof.

[0244] Similarly, although operations are depicted in a specific order in the figures, this should not be construed as requiring such operations to be performed in the specific order shown or in sequential order, or to perform all illustrated operations to achieve the desired result. Furthermore, the figures may schematically depict one or more example processes in the form of flowcharts. However, other operations not depicted may be incorporated into the schematically illustrated example processes. For example, one or more additional operations may be performed before, after, simultaneously with, or between any of the illustrated operations. In some contexts, multitasking and parallel processing are advantageous. Moreover, the separation of various system components in the described aspects should not be construed as requiring such separation in all aspects, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products. Additional aspects also fall within the scope of the appended claims. In some cases, the actions recited in the claims may be performed in a different order and still achieve the desired result.

Claims

1. A first user equipment (UE) for wireless communication, the first user equipment (UE) comprising: One or more memory units; and One or more processors, said one or more processors coupled to said one or more memories, said one or more processors being configured to cause the first UE to: Receive configuration information indicating a set of candidate physical sidelink feedback shared channel (PSFCH) timings, wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot; In the first time slot, receive first side link control information (SCI) indicating the first reserved resources from the second UE; In the second time slot, a second SCI indicating a second reserved resource is received from a third UE; as well as In a selected available PSFCH timing, a conflict indication associated with a conflicting resource is sent to the second UE, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one of the available PSFCH timings in the set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on the first time slot and the second time slot.

2. The first UE according to claim 1, wherein the first time gap includes the minimum PSFCH time gap.

3. The first UE according to claim 1, wherein the second time interval includes a maximum time for completing the sensing and resource selection process.

4. The first UE according to claim 1, wherein the sidelink PSFCH parameter value includes the first value of a first value and a second value, the set of candidate PSFCH timings includes the leftmost subset of a plurality of PSFCH timings occurring after a time period, the time period starting at the first time slot and having a length equal to the first time slot, and wherein the set of candidate PSFCH timings includes a first number of PSFCH timings.

5. The first UE of claim 4, wherein the set of available PSFCH opportunities includes a subset of the set of candidate PSFCH opportunities that occur when: After a time period that begins in both the first and second time slots and has a length equal to that of the first time slot, and Before the time slot associated with the conflicting resource ends and has a length equal to that of the second time slot.

6. The first UE of claim 1, wherein the sidelink PSFCH parameter value includes the second value of a first value and a second value, the set of candidate PSFCH timings includes the rightmost subset of a plurality of PSFCH timings that occurred before a time period, the time period ending at a time slot associated with the conflicting resource and having a length equal to the second time slot, and wherein the set of candidate PSFCH timings includes a first number of PSFCH timings.

7. The first UE of claim 6, wherein the set of available PSFCH opportunities includes a subset of the set of candidate PSFCH opportunities that occur when: Before the time period ending at the time slot associated with the conflicting resource and having a length equal to the second time slot, and After a time period that begins in both the first and second time slots and has a length equal to that of the first time slot.

8. The first UE according to claim 1, wherein the one or more processors are further configured to cause the first UE to: At least one candidate PSFCH opportunity from the set of candidate PSFCH opportunities that are skipped based on unmet timelines; and Based on the failure to send the conflict indication in a first subset of the set of available PSFCH opportunities, an attempt is made to send the conflict indication in at least one available PSFCH opportunity in the set of available PSFCH opportunities that occurs after the first subset.

9. The first UE of claim 8, wherein the failure to satisfy the timeline is associated with the at least one candidate PSFCH timing within a time period that begins in at least one of the first time slot or the second time slot and has a length equal to that of the first time slot.

10. The first UE of claim 8, wherein the failure to satisfy the timeline is associated with the at least one candidate PSFCH timing within a time period ending in a time slot associated with the conflicting resource and having a length equal to that of the second time slot.

11. The first UE of claim 1, wherein, in order for the first UE to send the conflict indication, the one or more processors are configured to cause the first UE to send the conflict indication based on a mapped PSFCH resource, wherein the mapped PSFCH resource is associated with an index of the selected available PSFCH timing.

12. The first UE of claim 11, wherein the index of the selected available PSFCH timing is based on an indexing scheme associated with the set of candidate PSFCH timings.

13. The first UE of claim 11, wherein the index of the selected available PSFCH timing is based on an indexing scheme associated with the set of available PSFCH timings.

14. The first UE of claim 1, wherein the configuration information indicates a first number of PSFCH timings associated with the set of candidate PSFCH timings, and wherein the one or more processors are further configured to cause the first UE to receive additional configuration information indicating an additional set of PSFCH timings, the additional set of PSFCH timings having a second number of PSFCH timings and associated with Hybrid Automatic Repeat Request (HARQ)-Acknowledgement (ACK) feedback.

15. The first UE of claim 14, wherein the set of candidate PSFCH timings is a subset of the additional set of PSFCH timings.

16. The first UE of claim 14, wherein the second quantity is less than or equal to the first quantity.

17. The first UE of claim 14, wherein the additional set of PSFCH timings is associated with the first SCI.

18. The first UE of claim 14, wherein the additional set of PSFCH timings is associated with an SCI in the first SCI or the second SCI, wherein the destination of the SCI is the first UE.

19. The first UE of claim 18, wherein, in order for the first UE to receive the configuration information indicating the set of candidate PSFCH timings, the one or more processors are configured to associate the first UE receiving the configuration information with the destination of the first SCI being the first UE.

20. The first UE of claim 19, wherein, in order for the first UE to receive the configuration information, the one or more processors are configured to cause the first UE to receive the configuration information in association with the side link type associated with the first UE being disabled.

21. The first UE of claim 1, wherein, in order for the first UE to receive the first SCI, the one or more processors are configured to cause the first UE to receive the first SCI on a first resource block (RB) set, and wherein, in order for the first UE to send the conflict indication, the one or more processors are configured to cause the first UE to send the conflict indication on the first RB set in association with the second SCI indicating the conflicting resource.

22. A second user equipment (UE) for wireless communication, the second user equipment (UE) comprising: One or more memory units; and One or more processors, said one or more processors coupled to said one or more memories, said one or more processors being configured to cause the second UE to: In the first time slot, a first sidelink control information (SCI) is transmitted, the first SCI indicating conflicting resources corresponding to sidelink resource reservations performed by a third UE; and The first subset of candidate PSFCH opportunities is monitored for the set of candidate PSFCH opportunities used for Physical Side Link Feedback Channel (PSFCH) communication.

23. The second UE of claim 22, wherein the one or more processors are further configured to cause the second UE to: Detect PSFCH communication associated with the conflicting resource in the first candidate PSFCH timing within the first subset of candidate PSFCH timings; and In connection with detecting the PSFCH communication associated with the conflicting resource, avoid monitoring a second subset of the set of candidate PSFCH timings, wherein the second subset of candidate PSFCH timings includes one or more candidate PSFCH timings that occur after the first candidate PSFCH timing.

24. The second UE of claim 22, wherein, in order for the second UE to monitor the first subset of candidate PSFCH timings, the one or more processors are configured to monitor the first subset of candidate PSFCH timings that occurred before a time period, the time period ending at a time slot associated with the conflicting resource and having a length equal to the time slot.

25. The second UE of claim 24, wherein the time interval includes a maximum time for completing the sensing and resource selection process.

26. A method for wireless communication performed by a first user equipment (UE), the method comprising: Receive configuration information indicating a set of candidate physical sidelink feedback shared channel (PSFCH) timings, wherein the set of candidate PSFCH timings is defined at least in part by sidelink PSFCH parameter values ​​and at least one of a first time slot or a second time slot; In the first time slot, receive first side link control information (SCI) indicating the first reserved resources from the second UE; In the second time slot, a second SCI indicating a second reserved resource is received from a third UE; as well as In a selected available PSFCH timing, a conflict indication associated with a conflicting resource is sent to the second UE, wherein the conflicting resource corresponds to the first reserved resource, wherein the selected available PSFCH timing is one of the available PSFCH timings in the set of candidate PSFCH timings, wherein the set of available PSFCH timings is based on the first time slot and the second time slot.

27. The method of claim 26, wherein, based on the sidelink PSFCH parameter value including the first value of a first value and a second value, the set of candidate PSFCH timings includes the leftmost subset of a plurality of PSFCH timings occurring after a time period that begins in the first time slot and has a length equal to the first time slot, wherein the set of candidate PSFCH timings includes a first number of PSFCH timings, and wherein the set of available PSFCH timings includes a subset of the set of candidate PSFCH timings that occurs under the following conditions: After a time period that begins in both the first and second time slots and has a length equal to that of the first time slot, and Before the time slot associated with the conflicting resource ends and has a length equal to that of the second time slot.

28. The method of claim 26, wherein, based on the sidelink PSFCH parameter value including the second value of a first value and a second value, the set of candidate PSFCH opportunities includes the rightmost subset of a plurality of PSFCH opportunities that occurred before a time period, the time period ending at a time slot associated with the conflicting resource and having a length equal to the second time slot, wherein the set of candidate PSFCH opportunities includes a first number of candidate PSFCH opportunities, and wherein the set of available PSFCH opportunities includes a subset of the set of candidate PSFCH opportunities that occur under the following conditions: Before the time slot ending with the conflicting resource and having a length equal to the second time slot, and After a time period that begins in both the first and second time slots and has a length equal to that of the first time slot.

29. A method for wireless communication performed by a second user equipment (UE), the method comprising: In the first time slot, a first side link control information (SCI) is sent, the first SCI indicating conflicting resources corresponding to the side link resource reservation performed by the third UE; as well as The first subset of candidate PSFCH opportunities is monitored for the set of candidate PSFCH opportunities used for Physical Side Link Feedback Channel (PSFCH) communication.

30. The method according to claim 29, further comprising: Detect PSFCH communication associated with the conflicting resource in the first candidate PSFCH timing within the first subset of the candidate PSFCH timings; as well as In association with detecting the PSFCH communication associated with the conflicting resource, a second subset of the set of candidate PSFCH timings is avoided from being monitored, wherein the second subset of candidate PSFCH timings includes one or more candidate PSFCH timings that occur after the first candidate PSFCH timing.

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