Physical sidelink feedback channel based channel occupancy time sharing and recovery in sidelink unlicensed broadband

Abstract

This disclosure provides systems, methods, and devices for physical sidelink feedback channel (PSFCH)-based channel occupancy time (COT) sharing and recovery in supported sidelink unlicensed (SL-U) broadband operations for wireless communications. In a first aspect, a method of wireless communication includes a COT initiating user equipment (UE) establishing a broadband COT associated with a plurality of resource block (RB) sets. The COT initiating UE transmits COT structure information (COT-SI) including a first indication to enable COT sharing with a neighboring UE and a second indication to allow transmission of the PSFCH. The COT initiating UE identifies a shared RB prior to using available RBs to resume transmissions in the COT. A responding UE will receive the COT-SI that allows sharing and transmission of a PSFCH, and will identify at least one selected PSFCH within the COT associated with the COT initiating UE before sharing the COT with respect to PSFCH transmission. Other aspects and features are also claimed and described.

Description

Technical Field

[0001] This disclosure relates generally to wireless communication systems, and more specifically to sidelink unlicensed wireless communication. Several features enable and provide improved communication, including channel occupancy time (COT) sharing and recovery based on the Physical Sidelink Feedback Channel (PSFCH) in sidelink unlicensed (SL-U) broadband operation. Background Technology

[0002] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, message sending and receiving, and broadcasting. These wireless networks can be multiple access networks capable of supporting multiple users by sharing available network resources. Such networks can be multiple access networks that support communication for multiple users by sharing available network resources.

[0003] A wireless communication network may include several components. These components may include wireless communication devices, such as a base station (or node B) that can support communication between multiple user equipments (UEs). UEs may communicate with the base station via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the base station to the UE, and an uplink (or reverse link) refers to the communication link from the UE to the base station or other network entities.

[0004] Network entities can send data and control information to the UE on the downlink or receive data and control information from the UE on the uplink. On the downlink, transmissions from network entities may encounter interference from transmissions from neighboring network entities or other radio frequency (RF) transmitters. On the uplink, transmissions from the UE may encounter interference from other UEs communicating with neighboring network entities or from uplink transmissions from other RF transmitters. This interference can degrade performance on both the downlink and uplink.

[0005] As the demand for mobile broadband access continues to grow, the likelihood of network interference and congestion is also increasing, with more UEs accessing long-range wireless communication networks and more short-range wireless systems being deployed in communities. Research and development are continuously advancing wireless technologies to not only meet the growing demand for mobile broadband access but also to enhance and improve the user experience of mobile communications.

[0006] Device-to-device (D2D) communication is a key enabling factor for connecting devices together to form the Internet of Things (IoT). D2D communication can be achieved using sidelink (SL) communication. Sidelinks are a core topology in 5G system design, enabling direct communication between two devices without the base station's involvement in data transmission and reception. Sidelink communication in unlicensed frequency bands (unlicensed sidelink (SL-U)) helps address this by offloading network traffic from licensed frequency bands, while also reducing associated licensing costs. When SL-U communication occurs on shared spectrum, each UE will first establish a Channel Occupancy Time (COT) on the available shared communication channel. COT refers to the total time that the UE sharing the COT and any other SLUE performs transmissions on the channel. Research and development continue to address the sharing of COT by non-COT-initiating UEs to enhance efficient access to SL-U communication. Summary of the Invention

[0007] The following summary outlines some aspects of this disclosure to provide a basic understanding of the techniques discussed. This summary is not an exhaustive overview of all the intended features of this disclosure, nor is it intended to identify key or essential elements of all aspects of this disclosure, nor to define the scope of any or all aspects of this disclosure. The sole purpose of this summary is to present, in a general form, some concepts of one or more aspects of this disclosure as a prelude to the more detailed description that follows.

[0008] In one aspect of this disclosure, a method of wireless communication performed by a user equipment (UE) includes: establishing a channel occupancy time (COT) with a wideband operating frequency associated with a plurality of resource block (RB) sets; transmitting a COT structure information (COT-SI) message on an unlicensed sidelink (SL-U) channel, the COT structure information (COT-SI) message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing transmission of a physical sidelink feedback channel (PSFCH); completing a first transmission within a portion of the COT; identifying a second transmission to update the transmission within the COT; identifying one or more shared RB sets from the plurality of RB sets; and transmitting the second transmission using one or more available RBs within the one or more shared RB sets.

[0009] In an additional aspect of this disclosure, a method of wireless communication performed by a UE includes: receiving a COT-SI message from a COT-initiating UE, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with a plurality of RB sets and a second indication allowing the transmission of PSFCHs; identifying at least one selected PSFCH for transmission from a plurality of selected PSFCHs within an RB in the plurality of RB sets and associated with the COT-initiating UE; and transmitting one or more selected PSFCHs from the plurality of selected PSFCHs in at least one of the plurality of RB sets on an SL-U channel.

[0010] In an additional aspect of this disclosure, an apparatus includes at least one processor and a memory coupled to the at least one processor. The at least one processor is operable to cause a UE to: establish a COT with a wideband operating frequency associated with a plurality of RB sets; transmit a COT-SI message on an SL-U channel, the COT-SI message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing the transmission of PSFCH; complete a first transmission within a portion of the COT; identify a second transmission to update the transmission within the COT; identify one or more shared RB sets from the plurality of RB sets; and transmit the second transmission using one or more available RBs within the one or more shared RB sets.

[0011] In an additional aspect of this disclosure, an apparatus for a UE includes at least one processor and a memory coupled to the at least one processor. The at least one processor is operable to cause the UE to: receive a COT-SI message from a COT-initiating UE, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with a plurality of RB sets and a second indication allowing the transmission of PSFCHs; identify at least one selected PSFCH for transmission from a plurality of selected PSFCHs within an RB in the plurality of RB sets and associated with the COT-initiating UE; and transmit one or more selected PSFCHs from the plurality of selected PSFCHs in at least one of the plurality of RB sets on an SL-U channel.

[0012] In an additional aspect of this disclosure, an apparatus having a UE includes: components for establishing a COT with a wideband operating frequency associated with a plurality of RB sets; components for transmitting a COT-SI message on an SL-U channel, the COT-SI message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing the transmission of PSFCH; components for completing a first transmission within a portion of the COT; components for identifying a second transmission to update the transmission within the COT; components for identifying one or more shared RB sets from the plurality of RB sets; and components for transmitting the second transmission using one or more available RBs within the one or more shared RB sets.

[0013] In an additional aspect of this disclosure, an apparatus having a UE includes: components for receiving a COT-SI message from a COT-initiating UE, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with a plurality of RB sets and a second indication allowing the transmission of PSFCHs; components for identifying at least one selected PSFCH among a plurality of selected PSFCHs for transmission within an RB in the plurality of RB sets and associated with the COT-initiating UE; and components for transmitting one or more selected PSFCHs among the plurality of selected PSFCHs in at least one of the plurality of RB sets on an SL-U channel.

[0014] In an additional aspect of this disclosure, a non-transitory computer-readable medium stores instructions within a UE, which, when executed by a processor, cause the processor to perform operations. These operations include: establishing a COT (Content Controller) with a wideband operating frequency associated with a plurality of RB (Resource Block) sets; components for transmitting a COT-SI (Content Controller-Initiated Sequence) message on an SL-U (Single-Loop-U) channel, the COT-SI message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing the transmission of PSFCH (Power-On-Side Filtering); components for completing a first transmission within a portion of the COT; components for identifying a second transmission to update the transmission within the COT; components for identifying one or more shared RB sets from the plurality of RB sets; and components for transmitting the second transmission using one or more available RBs within the one or more shared RB sets.

[0015] In an additional aspect of this disclosure, a non-transitory computer-readable medium stores instructions within a UE, which, when executed by a processor, cause the processor to perform operations. These operations include: receiving a COT-SI message from a COT-initiating UE, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with a plurality of RB sets and a second indication allowing the transmission of PSFCHs; identifying at least one selected PSFCH from a plurality of selected PSFCHs for transmission within an RB in the plurality of RB sets and associated with the COT-initiating UE; and transmitting one or more selected PSFCHs from at least one of the plurality of selected PSFCHs in the plurality of RB sets on an SL-U channel.

[0016] The features and technical advantages of the examples according to this disclosure have been summarized rather extensively above in order to better understand the detailed description below. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily utilized as the basis for modifying or designing other structures for achieving the same purpose of this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein (both their organization and manner of operation) and the associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each figure in the drawings is provided for illustrative and descriptive purposes and not as a limitation of the definitions in the claims.

[0017] While aspects and implementations are described herein by way of example, those skilled in the art will understand that additional implementations and use cases may arise in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and package arrangements. For example, aspects and / or implementations may be via integrated chip implementations and other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, AI-enabled devices, etc.). While some examples may or may not specifically point to a use case or application, applicability to various types of the described innovations is possible. The scope of implementations ranges from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more aspects of the described innovations. In some practical contexts, devices incorporating the described aspects and features may also necessarily include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals necessarily involve multiple components (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.) for analog and digital purposes. The innovations described herein are intended to be implemented in a variety of devices, chip-level components, systems, distributed arrangements, end-user equipment, etc., with different sizes, shapes, and constructions. Attached Figure Description

[0018] A further understanding of the nature and advantages of this disclosure can be achieved by referring to the following figures. In the figures, similar components or features may have the same reference numerals. Furthermore, various components of the same type can be distinguished by adding a dash after the reference numeral and a second numeral for differentiation between similar components. If only the first reference numerals are used in the specification, the description applies to any one of the similar components having the same first reference numerals, regardless of the second reference numerals.

[0019] Figure 1 This is a block diagram illustrating details of an example wireless communication system capable of supporting channel occupancy time (COT) sharing and recovery based on the Physical Sidelink Feedback Channel (PSFCH) in sidelink unlicensed (SL-U) broadband operation, according to one or more aspects.

[0020] Figure 2 This is a block diagram illustrating examples of base stations and user equipment (UEs) capable of supporting PSFCH-based COT sharing and recovery in SL-U broadband operations, based on one or more aspects.

[0021] Figure 3This is a block diagram illustrating an example wireless communication system that supports PSFCH-based COT sharing and recovery in SL-U broadband operation according to one or more aspects.

[0022] Figure 4A and Figure 4B This is a block diagram illustrating an example process for PSFCH-based COT sharing and recovery in SL-U broadband operations, based on one or more aspects.

[0023] Figure 5 This is a block diagram illustrating an example SL-U network, including UE0-UE5, configured to support PSFCH-based COT sharing and recovery in SL-U broadband operations according to one or more aspects.

[0024] Figure 6A This is a block diagram illustrating an example SL-U network, including UE0-UE5, configured to support PSFCH-based COT sharing and recovery in SL-U broadband operations according to one or more aspects.

[0025] Figure 6B This is a block diagram illustrating an example SL-U network, including UE0-UE5, configured to support PSFCH-based COT sharing and recovery in SL-U broadband operations according to one or more aspects.

[0026] Figure 7 This is a block diagram of an example base station supporting PSFCH-based COT sharing and recovery in SL-U broadband operations, based on one or more aspects.

[0027] The same reference numerals and names in different figures denote the same elements. Detailed Implementation

[0028] The specific embodiments described below with reference to the accompanying drawings are intended as descriptions of various configurations and are not intended to limit the scope of this disclosure. Rather, the specific embodiments include specific details for providing a thorough understanding of the subject matter of the invention. It will be apparent to those skilled in the art that these specific details are not necessary in every situation, and in some cases, well-known structures and components are shown in block diagram form for clarity of presentation.

[0029] This disclosure provides systems, apparatus, methods, and computer-readable media supporting PSFCH-based COT sharing and recovery in SL-U broadband operation. D2D communication allows multiple UEs and IoT devices to communicate directly with each other within a 5G system. Such D2D communication can be implemented using sidelink communication schemes on licensed or unlicensed spectrum. Sidelink communication in unlicensed bands (unlicensed sidelink (SL-U) communication) occurs on shared spectrum. A UE with data or control information to transmit will first establish a COT on an available shared communication channel. A COT refers to a time segment on a shared channel substantially reserved by the UE, during which the UE can perform communication from other UEs and radio nodes, possibly using different radio technologies, with a low probability of collision or conflict with the communication of the COT-initiating UE. However, the COT-initiating UE may not have a large amount of data or control information to transmit that would occupy the entire available bandwidth of the COT. Therefore, COT sharing is available, allowing adjacent UEs to share available resources within the COT to perform their own communication. The COT-initiating UE can transmit a signal indicating whether a particular COT can be shared. Additionally, this signal can indicate whether COT can be shared for feedback signaling such as PSFCH.

[0030] Problems may arise when a COT-initiating UE identifies control or data information available to resume transmission within the COT after ceasing the initial COT transmission, but the COT is available for sharing. Because available resources within the COT can be occupied by neighboring UEs sharing the COT, including shared feedback resources, the COT-initiating UE will not be able to resume transmission within the COT unless it can identify any resources that have been shared. If the COT-initiating UE cannot identify shared resources, it may not know whether those resources will have conflicting transmissions from neighboring UEs sharing the COT. According to the aspects described herein, the COT-initiating UE can identify shared resources within the COT by detecting feedback messages received from neighboring UEs in those resources. By providing the COT-initiating UE with a mechanism to identify shared resources within the COT, the COT-initiating UE can resume transmission within the COT when it identifies the data or control information used to resume transmission. Therefore, the COT-initiating UE can more efficiently utilize the resources it established in the COT, rather than waiting for a new opportunity to establish a new COT.

[0031] If the COT-initiating UE does not have the mechanism to identify shared resources in the COT, then the COT-initiating UE can determine that sharing the COT is not allowed. Without sharing enabled, neighboring UEs will not be able to transmit during the available resources of the COT. Additionally, the COT-initiating UE will typically not have the data and control information to occupy all available resources in the COT. Therefore, by allowing the mechanism to identify shared resources, COT resources can be used more efficiently by neighboring UEs that identify their ability to share COT resources with the COT-initiating UE.

[0032] An additional aspect of this disclosure further provides that the COT-initiating UE can provide an indication that neighboring UEs may share the COT when these neighboring UEs can occupy the entire bandwidth of the COT or a subset of the resources that need to be occupied. Since sharing by neighboring UEs requires that sharing occur when these neighboring UEs can occupy all the required shared bandwidth, the likelihood that another radio node sharing the channel, using different radio technologies, and possibly unable to receive the indication from the COT-initiating UE, will transmit communications that could potentially collide with other communications from the COT-initiating UE and neighboring UEs in the COT is reduced.

[0033] This disclosure relates throughout to providing or participating in licensed shared access between two or more wireless devices in one or more wireless communication systems (also referred to as wireless communication networks). In various specific implementations, technologies and apparatus can be used in wireless communication networks such as Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, Single Carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, fifth-generation (5G) or new radio (NR) networks (sometimes referred to as “5G NR” networks, systems, or devices), and other communication networks. As described herein, the terms “network” and “system” are used interchangeably.

[0034] For clarity, certain aspects of the apparatus and technology may be described below with reference to example 5G NR implementations or in a 5G-centric manner, and 5G terminology may be used as illustrative examples in the sections described below; however, this description is not intended to be limited to 5G applications.

[0035] Furthermore, it should be understood that, in operation, wireless communication networks adapted according to the concepts herein may operate using any combination of licensed or unlicensed spectrum, depending on load and availability. Therefore, it will be apparent to those skilled in the art that the systems, apparatuses, and methods described herein can be applied to other communication systems and applications besides the specific examples provided.

[0036] While aspects and implementations are described herein by way of example, those skilled in the art will understand that additional implementations and use cases may arise in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and package arrangements. For example, implementations or uses may be achieved via integrated chip implementations or other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail or purchasing devices, medical devices, AI-enabled devices, etc.). While some examples may or may not specifically point to a use case or application, the applicability of various types of the described innovations is evident. The scope of implementations ranges from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more of the described aspects. In some practical contexts, devices incorporating the described aspects and features may also necessarily include additional components and features for implementing and practicing the claimed and described aspects. The innovations described herein are expected to be implemented in a wide variety of specific implementations of different sizes, shapes and constructions, including both large and small devices, chip-level components, multi-component systems (e.g., radio frequency (RF) chains, communication interfaces, processors), distributed deployments, end-user equipment, etc.

[0037] Figure 1 An example of a wireless communication system 100 supporting RF component preferences in hybrid beamforming operations at mmWave frequency bands according to one or more aspects of this disclosure is illustrated. The wireless communication system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating under other systems and radio technologies, including future systems and radio technologies not expressly mentioned herein.

[0038] Network entity 105 may be distributed across a geographical area to form wireless communication system 100, and may include devices in different forms or with different capabilities. In various examples, network entity 105 may be referred to as a network element, mobility element, radio access network (RAN) node, or network equipment, etc. In some examples, network entity 105 and UE 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links).

[0039] UE 115 can be distributed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 can be stationary or mobile, or stationary and mobile at different times. UE 115 can be devices of different forms or with different capabilities. Figure 1 Some example UE 115s are illustrated herein. The UE 115 described herein can be used with various types of devices (such as... Figure 1 Communicate with other UEs 115 or network entities 105 shown.

[0040] As described herein, a node in the wireless communication system 100 (which may be referred to as a network node or a wireless node) may be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, apparatus, device, computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be UE 115. As another example, a node may be network entity 105.

[0041] In some examples, network entity 105 may communicate with core network 130, communicate with each other, or both. For example, network entity 105 may communicate with core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, network entity 105 may communicate with each other directly (e.g., directly between network entities 105) or indirectly (e.g., via core network 130) via backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, network entity 105 may communicate with each other via midhaul communication link 162 (e.g., according to midhaul interface protocol) or fronthaul communication link 168 (e.g., according to fronthaul interface protocol) or any combination thereof. Backhaul communication link 120, midhaul communication link 162, or fronthaul communication link 168 may be or include one or more wired links (e.g., electrical links, fiber optic links), one or more wireless links (e.g., radio links, wireless optical links), etc., or various combinations thereof. UE 115 can communicate with the core network 130 via communication link 155.

[0042] One or more network entities in network entity 105 described herein may include or be referred to as base station 140 (e.g., transceiver base station, radio base station, NR base station, access point, radio transceiver, transmit / receive point (TRP), Node B, evolved Node B (eNB), next-generation Node B or gigabit Node B (any of which may be referred to as gNB), 5G NB, next-generation eNB (ng-eNB), home Node B, home evolved Node B or other suitable terms). In some examples, network entity 105 (e.g., base station 140) may be implemented in a converged (e.g., monolithic, self-contained) base station architecture that may be configured to utilize a protocol stack physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as base station 140).

[0043] In some examples, network entity 105 may be implemented in a decomposed architecture (e.g., a decomposed base station architecture, a decomposed RAN architecture) that can be configured to utilize protocol stacks physically or logically distributed between two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., a near real-time RIC, a non-real-time RIC), a service management and orchestration (SMO) 180 system, or any combination thereof. RU 170 may also be referred to as a radio headend, an intelligent radio headend, a remote radio headend (RRH), a remote radio unit (RRU), or a transmit-receive point (TRP). One or more components of network entity 105 in a decomposed RAN architecture may be co-located, or one or more components of network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 in a decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0044] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other suitable term, wherein "device" may also be referred to as a unit, station, terminal, or client, etc. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine-type communication (MTC) device, etc., which may be implemented in a variety of objects such as electrical appliances, vehicles, meters, satellite radios, Global Positioning System (GPS) devices, Global Navigation Satellite System (GNSS) devices, logistics controllers, unmanned aerial vehicles (UAVs), drones, smart energy or security devices, solar panels or solar arrays, etc.

[0045] The UE 115 described herein is capable of communicating with various types of devices, such as other UEs 115 that may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 As shown in the image.

[0046] UE 115 and network entity 105 can wirelessly communicate with each other over one or more carriers via one or more communication links 125 (e.g., access links). The term "carrier" can refer to a set of RF spectrum resources having a physical layer structure defined for supporting communication link 125.

[0047] Physical channels can be multiplexed on a carrier using various techniques. For example, one or more of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels on a downlink carrier. The control region (e.g., control resource set (CORESET)) of the physical control channel can be defined by a set of symbol periods and can extend across the system bandwidth of the carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESET) can be configured for a set of UEs 115. For example, one or more UEs in UE 115 can monitor or search control regions to obtain control information based on one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a concatenated manner. The aggregation level of control channel candidates can refer to the amount of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space set may include a common search space set configured to transmit control information to multiple UEs 115 and a UE-specific search space set configured to transmit control information to a specific UE among the UEs 115.

[0048] In some examples, UE 115 may be able to communicate directly with other UEs in UE 115 via device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 performing D2D communication in a group may be within the coverage area 110 of network entity 105 (e.g., base station 140, RU 170), which may support various aspects of such D2D communication configured or scheduled by network entity 105. In some examples, one or more UEs 115 in such a group may be outside the coverage area 110 of network entity 105, or may otherwise be unable or not configured to receive transmissions from network entity 105. In some examples, the group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system in which each UE 115 transmits to each of the other UEs in the group. In some examples, network entity 105 may facilitate the scheduling of resources used for D2D communication. In other examples, D2D communication may be performed between UEs 115 without involving network entity 105.

[0049] In some systems, the D2D communication link 135 may be an example of a communication channel between vehicles (e.g., UE 115), such as a sidelink communication channel. In some examples, vehicles may communicate using vehicle-to-vehicle (V2X) communication, vehicle-to-vehicle (V2V) communication, or a combination of these. Vehicles may signal information related to traffic conditions, signal control, weather, safety, emergencies, or any other information relevant to the V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure such as roadside units, or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170) using vehicle-to-network (V2N) communication, or both.

[0050] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or PDCP layer can be IP-based. The RLC layer can perform packet segmentation and reassembly for transmission over logical channels. The MAC layer can perform priority handling and multiplexing of logical channels to transport channels. The MAC layer can also use error detection, error correction, or both to support retransmission at the MAC layer to improve link efficiency. In the control plane, the RRC protocol layer can provide the establishment, configuration, and maintenance of RRC connections between the UE 115 and network entity 105 or core network 130 that support user plane data radio bearers. At the PHY layer, transport channels can be mapped to physical channels.

[0051] UE 115 and network entity 105 may support data retransmission to increase the likelihood of successful data reception. Hybrid Automatic Repeat Request (HARQ) feedback is a technique used to increase the likelihood of correct data reception over communication links (e.g., communication link 125, D2D communication link 135). HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device may support simultaneous time-slot HARQ feedback, where the device can provide HARQ feedback in a specific time slot for data received in a previous symbol within that time slot. In some other examples, the device may provide HARQ feedback in subsequent time slots or according to a different time interval.

[0052] Figure 2 This is a block diagram illustrating an example of a base station 140 and a UE 115 according to one or more aspects. The base station 140 and UE 115 can be... Figure 1This refers to any network entity and base station within the network entity and base station, as well as one UE within the UE. For restricted association scenarios (as mentioned above), network entity 105 can be a small cell base station, and UE 115 can be UE 115 operating within the service area of ​​the small cell base station. To access the small cell base station, this UE will be included in the small cell base station's list of accessible UEs. Base station 140 can also be some other type of base station. For example... Figure 2 As shown, network entity 105, such as base station 140, may be equipped with antennas 234a to 234t, and UE 115 may be equipped with antennas 252a to 252r for facilitating wireless communication.

[0053] At base station 140, transmitting processor 220 can receive data from data source 212 and control information from controller 240, such as a processor. The control information may be for a Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ (Automatic Repeat Request) Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Enhanced Physical Downlink Control Channel (EPDCCH), MTC Physical Downlink Control Channel (MPDCCH), etc. The data may be for a Physical Downlink Shared Channel (PDSCH), etc. Additionally, transmitting processor 220 can process (e.g., encoding and symbol mapping) the data and control information separately to obtain data symbols and control symbols. Transmitting processor 220 can also generate reference symbols, for example, for primary synchronization signals (PSS) and secondary synchronization signals (SSS), as well as cell-specific reference signals. The transmit (TX) MIMO processor 230 can perform spatial processing (e.g., pre-decoding, where applicable) on data symbols, control symbols, or reference symbols, and can provide an output symbol stream to modulators (MODs) 232a to 232t. For example, spatial processing performed on data symbols, control symbols, or reference symbols may include pre-decoding. Each modulator 232 can (e.g., for OFDM, etc.) process its respective output symbol stream to obtain an output sample stream. Additionally or alternatively, each modulator 232 can process the output sample stream (e.g., perform analog conversion, amplification, filtering, and up-conversion) to obtain a downlink signal. The downlink signal from modulators 232a to 232t can be transmitted via antennas 234a to 234t, respectively.

[0054] At UE 115, antennas 252a to 252r can receive downlink signals from base station 140 and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, down-convert, and digitize) the corresponding received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM, etc.) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide the detected symbols. Receiver processor 258 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide the decoded data for UE 115 to data sink 260, and provide the decoded control information to controller 280, such as a processor.

[0055] On the uplink, at UE 115, the transmitting processor 264 can receive and process data from data source 262 (e.g., for the Physical Uplink Shared Channel (PUSCH)) and control information from controller 280 (e.g., for the Physical Uplink Control Channel (PUCCH)). Additionally, the transmitting processor 264 can also generate reference symbols for reference signals. Symbols from the transmitting processor 264 can be pre-decoded by the TX MIMO processor 266 (where applicable), further processed by modulators 254a to 254r (e.g., for SC-FDM, etc.), and transmitted to network entity 105. At network entity 105, uplink signals from UE 115 can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 where applicable, and further processed by receiving processor 238 to obtain the decoded data and control information transmitted by UE 115. The receiver processor 238 can provide the decoded data to the data sink 239 and the decoded control information to the controller 240.

[0056] Controllers 240 and 280 can respectively direct operations at base station 140 and UE 115. Controller 240 or other processors and modules at base station 140, or controller 280 or other processors and modules at UE 115, can perform or direct the execution of various processes used in the techniques described herein, such as performing or directing... Figure 4A and Figure 4B Other processes executed or used in the techniques described herein. Memory 242 and 282 may store data and program code for base station 140 and UE 115, respectively. Scheduler 244 may schedule the UE to perform data transmission on the downlink or uplink.

[0057] In some cases, UE 115 and base station 140 may operate in a shared radio frequency spectrum band, which may include licensed or unlicensed (e.g., contention-based) frequency spectrum. In the unlicensed frequency portion of the shared radio frequency spectrum band, UE 115 or base station 140 may conventionally perform a medium sensing procedure to compete for access to the frequency spectrum. For example, UE 115 or base station 140 may perform a Listen-Before-Speak or Listen-Before-Send (LBT) procedure such as Clear Channel Assessment (CCA) before communication to determine whether a shared channel is available. In some implementations, CCA may include an energy detection procedure to determine if any other active transmissions are present. CCA may also include the detection of a specific sequence indicating channel usage.

[0058] Typically, four types of LBT procedures have been proposed for sensing signals indicating channel occupancy on a shared channel. In the first category (CAT 1 LBT), no LBT or CCA is applied to detect shared channel occupancy. The second category (CAT2 LBT) (also known as shortened LBT, single LBT, 16-μs LBT, or 25-μs LBT) specifies that nodes perform CCA to detect energy exceeding a predetermined threshold or to detect messages or preambles occupying the shared channel. CAT 2 LBT performs CCA without using random backoff operations, resulting in a shortened length relative to the next category.

[0059] The third category (CAT 3LBT) performs a Control Channel Allocation (CCA) to detect energy or messages on the shared channel, but also uses random backoff and a fixed contention window. Therefore, when a node initiates a CAT 3LBT, it performs a first CCA to detect occupancy of the shared channel. If the shared channel is idle during the duration of the first CCA, the node can continue transmitting. However, if the first CCA detects a signal indicating occupancy of the shared channel, the node selects random backoff based on a fixed contention window size and performs an extended CCA. If the shared channel is detected to be idle during the extended CCA and the random number has decremented to 0, the node can begin transmitting on the shared channel. Otherwise, the node decrements the random number and performs another extended CCA. The node continues performing extended CCAs until the random number reaches 0. If the random number reaches 0 and no channel occupancy is detected in any of the extended CCAs, the node can then transmit on the shared channel. If, during any of the extended CCAs, the node detects channel occupancy, the node can reselect a new random backoff based on a fixed contention window size to restart the countdown.

[0060] The fourth category (CAT 4LBT) (which can also be referred to as the full LBT process) uses random backoff and a variable contention window size to perform CCA with energy or message detection. The sequence of CCA detection is performed similarly to that of the CAT 3LBT process, except that the contention window size is variable for the CAT 4LBT process.

[0061] Sensing for shared channel access can also be classified into full-type or shortened-type LBT procedures. For example, a full LBT procedure, such as a CAT 3 or CAT 4 LBT procedure (which includes extended channel gap assessment (ECCA) over a non-trivial number of 9-μs time slots), can also be referred to as "Type 1 LBT". A shortened LBT procedure, such as a CAT 2 LBT procedure (which may include a one-off CCA for 16-μs or 25-μs), can also be referred to as "Type 2 LBT".

[0062] A key issue with the development of IoT networks is the congestion of cellular spectrum resources caused by the increasing number of IoT devices. Sidelink communication (SL-U) in unlicensed frequency bands helps address this issue by offloading network traffic from licensed bands, while also reducing associated licensing costs. IoT devices and UEs with sidelink capabilities can use direct RF communication interfaces such as PC5 to communicate with other IoT devices and UEs, whether via licensed or unlicensed spectrum.

[0063] When SL-U communication occurs on a shared spectrum, each UE will first establish a Communication over Time (COT) on an available shared communication channel. COT refers to the total time that the UE sharing the COT and any other SL UE perform transmissions on the channel after the COT-initiating UE executes the corresponding channel access procedures, such as the CCA and LBT procedures described above. For aspects related to this disclosure, problems may arise when a COT-initiating UE operating using wideband SL-U communication has stopped transmitting, thus allowing other SL UEs to share the COT, and wants to resume transmission in the SL-U wideband spectrum. If COT sharing is allowed in this scenario, the COT-initiating UE should identify which resource block (RB) sets can be resumed by the COT-initiating UE for transmission, and if not, how the COT-initiating UE ensures that the entire wideband spectrum for SL-U communication will be occupied.

[0064] According to the various aspects described herein, a shared RB set among multiple RB sets constituting a wideband SL-U COT can be identified by detecting the Physical Sidelink Feedback Channel (PSFCH) associated with the COT-initiating UE from other COT-sharing UEs. These COT-sharing UEs transmit PSFCH in response to the Physical Sidelink Shared Channel (PSSCH) from the COT-initiating UE. The PSFCH may include hybrid Automatic Repeat Request (HARQ) Acknowledgment (HARQ-ACK) information, collision indication information, etc. These COT-sharing UEs transmitting PSFCH are referred to herein as responding UEs. When performing PSFCH transmission, responding UEs identify whether they can transmit PSFCH in a COT shared by the COT-initiating UE by identifying at least one PSFCH transmission in the symbols or time slots of the multiple RB sets associated with the COT-initiating UE within the COT. In an additional or alternative aspect, if at least one such PSFCH is scheduled within the Wideband SL-U COT for transmission to the COT-initiating UE, the responding UE may also transmit PSFCHs addressed to UEs other than the COT-initiating UE within the shared COT. However, the COT-initiating UE will detect PSFCHs addressed to that COT-initiating UE. Therefore, the COT-initiating UE may not be able to identify whether some RB sets of the Wideband SL-U COT do not include PSFCHs from the responding UE addressed to it (the COT-initiating UE).

[0065] Because the responding UE may have PSFCHs associated with the COT-initiating UE and PSFCHs associated with other UEs, the responding UE will schedule such PSFCHs based on several considerations, such as the maximum number of PSFCHs the responding UE can transmit simultaneously and the maximum allowed transmit power. To calculate the transmit power of the scheduled PSFCHs, the responding UE can use various parameters and measurements, some of which may be provided by network entities or base stations, such as via Radio Resource Control (RRC) signaling. Some of the parameters provided to the responding UE for calculating the transmit power of the scheduled PSFCHs include: dl-P0-PSFCH, which corresponds to an indication of the initial power (P0) value for power control based on downlink path loss for PSFCH transmission; dl-alpha-PSFCH, which corresponds to an indication of the α or weighted power for power control based on downlink path loss for PSFCH transmission; and alphaPSFCH, which corresponds to a weighted value associated with the PSFCH path loss.

[0066] If dl-P0-PSFCH is provided, the transmit power of PSFCH can be calculated using the following formula:

[0067] P PSFCH,one =P O,PSFCH +10log 10 (2 μ )+α PSFCH ·PL[dBm] (1)

[0068] Where P O,PSFCH It is the value of dl-P0-PSFCH; α PSFCH It is the value of dl-alpha-PSFCH (if provided), or 1 (if dl-alpha-PSFCH is not provided); and when the active side link bandwidth portion (BWP) is on serving cell c, PL = PL b,f,c (q d With the exception that the UE is configured to monitor the Physical Downlink Control Channel (PDCCH) in serving cell c to detect DCI format 0_0, the Reference Signal (RS) resource can be the RS used by the UE in serving cell c to determine the power transmitted by the Physical Uplink Shared Channel (PUSCH) scheduled by DCI format 0_0. For path loss estimation, the UE will maintain the same signal as q. d The indexed RS resource corresponds to the RS resource, where PL b,f,c (q d The RS resource represents the path loss on the active uplink BWPb of carrier f in serving cell c. When the responding UE is not configured to monitor the PDCCH in serving cell c to detect DCI format 0_0, the RS resource may correspond to the synchronization signal (SS) / physical broadcast channel (PBCH) block that the responding UE will use to obtain the master information block (MIB) message.

[0069] When the UE responds during the PSFCH transmission timing, it supports up to N. max,PSFCH Simultaneous PSFCH transmission, and the UE has N responses to be sent at a given PSFCH transmission timing. sch,Tx,PSFCH When scheduling a PSFCH, the responding UE will select N in ascending priority order based on the type of information carried by the PSFCH during the PSFCH transmission timing. Tx,PSFCH The actual PSFCH is sent. For example, the ascending priority rule is first applied to the PSFCH carrying HARQ-ACK information (if any), and then to the PSFCH carrying collision indication information (if any). In the first scenario, when the number of scheduled PSFCHs N is sent... sch,Tx,PSFCH Less than or equal to the maximum number N sent simultaneously by PSFCH max,PSFCH (N sch,Tx,PSFCH ≤N max,PSFCH ), and when dl-P0-PSFCH has been configured or provided, if the total transmit power N of the scheduled PSFCH issch,Tx,PSFCH Equal to or less than the maximum allowable transmission power P CMAX , making P PSFCH,one +10log 10 (N sch,Tx,PSFCH )≤P CMAX Then the UE will send the actual number N of PSFCH messages. Tx,PSFCH The number N selected is equal to the number of PSFCHs scheduled to be sent. sch,Tx,PSFCH (N Tx,PSFCH =N sch,Tx,PSFCH ).

[0070] It should be noted that the ascending priority rule causes the PSFCH associated with the lowest priority value in the priority value field of the corresponding PSSCH to be selected first, and then the PSFCH associated with the next lowest priority value is selected. For example, when multiple scheduled PSFCHs include those carrying HARQ-ACK information and those carrying conflict indication information, the ascending priority rule will cause the lowest to highest priority value associated with the PSFCH carrying HARQ-ACK to be selected first, and then the lowest to highest priority value associated with the PSFCH carrying conflict indication information is selected, until the number of PSFCHs actually selected is reached.

[0071] In another scenario, when N sch,Tx,PSFCH The total transmit power of each PSFCH is greater than P CMAX Furthermore, when dl-P0-PSFCH is configured, the responding UE can first use the ascending priority rule of the priority field value of the PSFCH transmission with HARQ-ACK information (if any), and then autonomously determine the actual number N of PSFCH transmissions using the ascending priority rule of the priority field value of the PSFCH transmission with conflict indication information (if any). Tx,PSFCH This makes the actual number N sent by PSFCH Tx,PSFCH The following equations are satisfied:

[0072]

[0073] Where M i (For 1≤i≤8) is the number of PSFCHs with priority value i that carry HARQ-ACK information, and M i (For i>8) is the number of PSFCHs with priority value i-8 that carry conflict indication information, and K is defined as the maximum value that satisfies the following equation:

[0074]

[0075] Where PCMAX The response UE is based on standards-based calculations targeting The transmission of all PSFCH (if any, or zero (0) otherwise) determines the power P. PSFCH,k (i) For PSFCH transmission, k is given, where 1≤k≤N Tx,PSFCH It is determined according to the following equation:

[0076] P PSFCH,k (i)=min(P CMAX -10log 10 (N Tx,PSFCH ),P PSFCH,one [dBm]. (4)

[0077] Where P CMAX -10log 101 (N Tx,PSFCH ) represents the allowed transmit power at the UE, and P PSFCH,one This indicates the required transmission power.

[0078] In another scenario, when the scheduled number of PSFCH transmissions N is... sch,Tx,PSFCH Exceeding the maximum number N sent simultaneously by PFSCH max,PSFCH (N sch,Tx,PSFCH >N max,PSFCH And when dl-P0-PSFCH has been configured, if according to the following equation, N max,PSFCH The total transmit power of each PSFCH is equal to or less than the maximum transmit power P. CMAX The responding UE first uses the ascending priority rule of the corresponding priority field value sent via PSFCH carrying HARQ-ACK information (if any), and then also uses the ascending priority rule of the corresponding priority field value sent via PSFCH carrying conflict indication information to select N. max,PSFCH One PSFCH:

[0079] P PSFCH,one +10log 10 (N max,PSFCH )≤P CMAX (5)

[0080] The actual number N sent by PSFCH Tx,PSFCH Equal to the maximum number N of simultaneous PSFCH max,PSFCH And P PSFCH,x (i)=P PSFCH,one [dBm].

[0081] In another scenario, when N sch,Tx,PSFCH The total transmit power of each PSFCH is greater than P CMAXFurthermore, when dl-P0-PSFCH is configured, the responding UE can use the ascending priority rule of the corresponding priority field value of the PSFCH transmission carrying HARQ-ACK information (if any), and then autonomously select the actual number N of PSFCH transmissions using the ascending priority rule of the corresponding priority field value of the PSFCH transmission carrying conflict indication information (if any). Tx,PSFCH This ensures that the actual number of PSFCH transmissions will satisfy the relationship in equation (2), where M i (1≤i≤8) represents the number of PSFCHs with priority field value i for each PSFCH carrying HARQ-ACK information, and M i (i>8,) is the number of PSFCHs with a priority field value of i-8 for each PSFCH carrying conflict indication information, and K is defined as the maximum value that satisfies the relationship in equation (3), where P CMAX The response UE is based on standards-based calculations targeting The transmission of all PSFCH (if any, or otherwise zero (0)) determines the P... PSFCH,k (i) Determined according to equation (4).

[0082] In another scenario where dl-P0-PSFCH is not configured, the responding UE can use the ascending priority rule of the corresponding priority field value of the PSFCH transmission carrying HARQ-ACK information (if any), and then autonomously determine the actual number N of PSFCH transmissions using the ascending priority rule of the corresponding priority field value of the PSFCH transmission carrying conflict indication information (if any). Tx,PSFCH , making N Tx,PSFCH ≥1 and the total power P transmitted by the actual number of PSFCHs TX,PSFCH Less than or equal to the maximum transmit power P CMAX .

[0083] For UE-to-UE COT sharing in an SL-U network, when at least one PSFCH transmission from a responding UE is scheduled within a symbol or time slot of one of the RB sets corresponding to the shared COT and is intended for the COT-initiating UE, the responding UE can use the COT shared by the COT-initiating UE. However, due to UE capacity or maximum transmit power constraints, the maximum number of PSFCHs that a UE can transmit simultaneously is limited. When the actual number N of simultaneous PSFCHs is... Tx,PSFCH The total transmit power P exceeding the UE capacity or the actual number of PSFCHs simultaneously TX,PSFCH Exceeding the maximum transmission power P CMAXAt this time, the UE will first select the PSFCH to be transmitted based on the type of information carried by the PSFCH, where HARQ-ACK information has a higher priority than collision indication information, and then within each information type, select the PSFCH to be transmitted according to the ascending priority rule of the priority field value of the given information carried by the PSFCH. This current PSFCH transmission selection process is defined for licensed frequency band communication and may not take into account whether the PSFCH will be transmitted in a shared COT.

[0084] Figure 3 This is a block diagram of an example wireless communication system 300 supporting PSFCH-based COT sharing and recovery in SL-U broadband operation, according to one or more aspects. In some examples, wireless communication system 300 may implement aspects of wireless communication system 100. Wireless communication system 300 includes UE 115s and UE 115b. Although UE 115a and 115b are illustrated, in some other specific implementations, wireless communication system 300 may typically include multiple UE 115s and other network nodes, such as one or more network entities, gNBs, etc.

[0085] UEs 115a and 115b may include various components (such as structural components, hardware components) for performing one or more of the functions described herein. For example, these components may include one or more processors 300a and 300b (hereinafter collectively referred to as “processor 300a” and “processor 300b”), one or more memory devices 282a and 282b (hereinafter collectively referred to as “memory 282a” and “memory 282b”), one or more transmitters 320a and 320b (hereinafter collectively referred to as “transmitter 320a” and “transmitter 320b”), and one or more receivers 330a and 330b (hereinafter collectively referred to as “receiver 330a” and “receiver 330b”). Processors 300a and 300b may be configured to execute instructions stored in memories 282a and 282b, respectively, to perform the operations described herein. In some specific embodiments, processors 300a and 300b respectively include or correspond to Figure 2 The receiver processor 258, the transmitter processor 264, and the controller 280 are one or more of these, and the memories 282a and 282b respectively include or correspond to the receiver processor 258, the transmitter processor 264, and the controller 280. Figure 2 The memory 282. Memory 282a and 282b respectively include or are configured to store SL-U communication logic 301, SL resource configuration 302, SL feedback logic 303, SL-U communication logic 311, SL resource configuration 312, SL feedback logic 313 and COT sharing logic 314.

[0086] Transmitters 320a and 320b are configured to transmit reference signals, control information, and data from UEs 115a and 115b to one or more other devices, including to other UEs such as another UE (UEs 115b and 115a), on a sidelink interface such as PC5, and receivers 330a and 330b are configured to receive reference signals, synchronization signals, control information, and data from one or more other devices, including from other UEs such as another UE (UEs 115b and 115a), on a sidelink interface. For example, via the PC5 sidelink interface, transmitters 320a and 320b can transmit signaling, control information, and data (messages 380 and 370, respectively) to another UE (UEs 115b and 115a), and receivers 330a and 330b can receive signaling, control information, and data (messages 370 and 380, respectively) from that other UE. In some implementations, transmitters 320a and 320b and receivers 330a and 330b may be integrated into one or more transceivers. Additionally or alternatively, transmitters 320a and 320b or receivers 330a and 330b may respectively include or correspond to references. Figure 2 One or more components of the described UE 115.

[0087] In some specific implementations, the wireless communication system 300 implements a 5G NR network. For example, the wireless communication system 300 may include multiple UEs 115a and 115b with 5G capabilities and multiple network entities 105 with 5G capabilities. Figure 1 ), such as UEs and network entities configured to operate according to 5G NR network protocols, such as 5G NR network protocols defined by 3GPP.

[0088] During operation of the wireless communication system 300, when the code and instructions of the SL-U communication logic 301 and the SL feedback logic 303 are executed by the processor 300a (referred herein as the “execution environment” of the SL-U communication logic 301 and the SL feedback logic 303), the features and functionality of UE 115a supporting PSFCH-based COT sharing and recovery in SL-U broadband operation are implemented according to one or more aspects. The execution environment of the SL-U communication logic 301 enables UE 115a to perform sidelink communication on unlicensed spectrum. UE 115a may use the resource configuration stored in memory 282a in conjunction with the execution environment of the SL-U communication logic 301 at the SL resource configuration 302 to enable COT to perform such SL-U communication. SL-U communication may include transmissions such as message 380 associated with UE 115b via PSFCH. The execution environment of the SL feedback logic 303 enables UE 115a, when acting as a COT-initiating UE, to identify feedback transmissions, such as PSFCH, received from one or more neighboring UEs. For example, using one or more PSSCHs sent from UE 115a to UE 115b, UE 115a can expect to receive PSFCHs from UE 115b, such as message 370, within the execution environment of SL feedback logic 303.

[0089] In additional operation of the wireless communication system 300, UE 115b may also execute SL-U communication logic 311 and SL feedback logic 313 via processor 300b, enabling UE 115b to perform sidelink communication on unlicensed spectrum in conjunction with SL resource allocation in SL resource configuration 312 stored in memory 282b. Within the execution environment of SL-U communication logic 311, UE 115b is expected to receive a COT-SI message, which identifies the wideband SL-U bandwidth of the COT enabled by UE 115a. The COT-SI message may indicate whether the COT created by UE 115a can be shared. UE 115b may further receive PSSCH (message 380) from UE 115a via receiver 330b. Within the execution environment of SL-U communication logic 311, SL feedback logic and COT sharing logic 314, UE 115b can generate a feedback message for transmission via PSFCH, indicating whether the PSFCH symbol of COT can be shared, and then share COT by sending PSFCH (message 370) to UE 115a.

[0090] If UE 115a identifies that it wants to resume transmission within the COT, within the execution environment for SL-U communication logic 301 and SL feedback logic 303, UE 115a can identify which RB sets among the multiple RB sets of the SL-U broadband COT are shared. This identification can be performed when it is detected that UE 115a receives any PSFCH, such as message 370, from UE 115b on which RB set. Once UE 115a identifies the shared RB sets within the SL-U broadband COT, the UE can resume transmission on the available RBs in those shared RB sets.

[0091] For reference Figure 3 As described, this disclosure provides techniques for PSFCH-based COT sharing and recovery in SL-U broadband operation. Such techniques allow enhanced COT sharing of broadband SL-U channels, which will allow non-COT-initiating UEs more opportunities to share the COT, while allowing COT-initiating UEs to recover transmissions within the COT by identifying which RB sets in the broadband SL-U COT have been shared. Additional techniques allow COT-initiating UEs to share the COT while ensuring that all RB sets of the broadband SL-U COT are available for use by sharing UEs.

[0092] Figure 4A This is a block diagram illustrating an example procedure 40 for PSFCH-based COT sharing and recovery in SL-U broadband operation, based on one or more aspects. The operation of procedure 40 can be performed by the UE as described in the reference above. Figure 1 , Figure 2 , Figure 3 The UE115 or 115a described or referenced Figure 7 The UE described is to perform this. For example, the example operation of procedure 40 (also referred to as the “box”) enables UE 115 to support PSFCH-based COT sharing and recovery in SL-U broadband operations.

[0093] At box 400, the UE establishes a COT with wideband operating frequencies associated with multiple RB sets. In the SL-U channel, the UE enables the COT to reserve a portion of the unlicensed channel for communication. The UE may perform an LBT or CCA procedure to first detect whether the channel is occupied before enabling the COT. According to the various aspects described herein, the UE will enable SL-U wideband COTs associated with a certain number of RB sets.

[0094] At block 401, the UE transmits a COT-SI message on the SL-U channel. This COT-SI message includes a first indication enabling COT sharing with one or more neighboring UEs capable of SL-U communication and a second indication allowing PSFCH transmission. After enabling SL-U wideband COT, the COT-initiating UE transmits a COT-SI defining the structure of the COT, including the COT-SI representing the set of RBs constituting the wideband SL-U bandwidth. Additionally, the COT-SI may include an indication of whether shared COT transmission for PSFCH is permitted. Neighboring UEs can receive this COT-SI and identify whether communication between these neighboring UEs can be transmitted at the shared portion of the COT.

[0095] At box 402, the UE completes its first transmission within a portion of the COT. After enabling the COT and transmitting the COT-SI, the COT-initiating UE can execute transactions for that COT-initiating UE that enabled the COT. These transmissions can occur via control signals in the PSCCH, data in the PSSCH, etc. In many scenarios, the COT-initiating UE may not have enough transmissions to occupy the entire COT. Therefore, the COT-initiating UE indicates its ability to share the COT with neighboring UEs.

[0096] At box 403, the UE identifies a second transmission to update the transmission within the COT. After completing the original transmission within the COT, the COT-initiating UE can discover additional control or data that it wants to transmit within the COT. Because the COT-initiating UE initially stopped transmitting, which allows adjacent UEs to share the COT, a preference will be given to resuming transmissions within the COT.

[0097] At box 404, the UE identifies one or more shared RB sets from a plurality of RB sets. Because adjacent UEs may share the COT after the COT-initiating UE has completed its initial transmission, the COT-initiating UE will identify which of the number of RB sets constituting the SL-U broadband COT has been shared with the UE. The COT-initiating UE can identify this by detecting the PSFCH associated with and received by the COT-initiating UE.

[0098] At box 405, the UE uses one or more available RBs within one or more shared RB sets to transmit a second transmission. Once the COT-initiating UE has identified which RB sets are shared in the SL-U broadband COT, the COT-initiating UE can use available RBs within those shared RB sets to resume its transmission. If the COT-initiating UE fails to detect the reception of PSFCH in some RB sets constituting the COT, the COT-initiating UE will avoid resuming transmission in the COT within those non-shared RB sets or will lose access to such resuming transmissions.

[0099] Figure 4B This is a block diagram illustrating an example procedure 41 for PSFCH-based COT sharing and recovery in SL-U broadband operation, supporting one or more aspects. The operation of procedure 41 can be performed by the UE as described in the reference above. Figure 1 , Figure 2 , Figure 3 The UE115 or 115b described or referenced Figure 7 The UE described is to perform this. For example, the example operation of procedure 41 (also referred to as the “box”) enables UE 115 to support PSFCH-based COT sharing and recovery in SL-U broadband operations.

[0100] At box 410, the UE initiates the reception of a COT-SI message from the COT. The COT-SI includes a first indication enabling COT sharing among COTs with wideband operating frequencies associated with multiple RB sets, and a second indication allowing PSFCH transmission. UEs capable of sidelink communication on unlicensed spectrum will monitor and receive the COT-SI message, which configures the structure of the COT already enabled by a neighboring UE. The COT-SI defines the number of RB sets constituting the SL-U wideband COT and potentially indicates whether the COT can be shared for PSFCH transmission.

[0101] At box 411, the UE identifies at least one selected PSFCH for transmission from a plurality of selected PSFCHs that is within an RB in a plurality of RB sets and is associated with the COT-initiating UE. As a non-COT-initiating UE, the UE identifies that it has received PSSCH messages from neighboring UEs, which may include COT-initiating UEs that issued COT-SI messages and thus caused PSFCH messages to be transmitted within the SL-U broadband COT. If such a UE identifies a PSFCH for transmission, then such a UE becomes a responding UE and identifies whether the at least one PSFCH selected by such a UE for transmission is within an RB set in the SL-U broadband COT and is associated with the COT-initiating UE. If the PSFCH of such an addressing COT-initiating UE is identified within the COT, the responding UE determines that the responding UE can share the COT. Otherwise, the responding UE may not transmit its PSFCH to other non-COT-initiating UEs within the COT.

[0102] At box 412, the UE transmits one or more selected PSFCHs from at least one of the multiple selected PSFCHs in a plurality of RB sets on the SL-U channel. If the responding UE identifies that it has at least one PSFCH associated with a COT-initiated UE for transmission within the COT, the responding UE may share the COT and transmit one or more scheduled PSFCHs from the PSFCHs scheduled by the responding UE within the COT.

[0103] Figure 5This is a block diagram illustrating an example SL-U network 50 including UE0-UE5, configured to support PSFCH-based COT sharing and recovery in SL-U broadband operation according to one or more aspects. SL-U network 50 includes a broadband SL-U channel 500. UE1 establishes a COT 501 within the broadband SL-U channel 500, including RB sets #0-#2. UE1 transmits a COT-SI including information about COT 501, including indications on whether COT sharing for COT 501 is permitted, and whether COT 501 allows PSFCH-only transmission, PSSCH-only transmission, or both PSFCH and PSSCH transmission. PSFCH symbols 503 and 504 provide feedback symbols available for UE1 and other UEs sharing COT 501 to provide feedback to any received PSSCH included in PSSCH slot 505. Any of the non-COT-initiating UEs (UE0 and UEs 2-5) may share COT 501 within COT-SI transmissions, provided that UE1 permits it, and may transmit only PSFCH, only PSSCH, or both. UE0 and UEs 2 through 5 may share COT 501 for PSFCHs, provided that UE1 permits it, by identifying whether at least one scheduled PSFCH is scheduled within a symbol or slot of any RB set #0-#2 in COT 501. If UE0 or any of UEs 2 through 5 identifies that no PSFCH is associated with UE1 within COT 501, such a non-COT-initiating UE (responding UE) responding to a PSSCH received within PSSCH slot 505 may not share COT 501.

[0104] The COT-initiating UE (UE1) identifies whether partial sharing is permitted by indicating that it has information for resuming transmissions within COT 501. For example, UE1 sends a PSSCH (>UE1) to UE0 in PSSCH slot 505. If UE1 further identifies information that it can transmit further within COT 501, partial sharing is enabled for the remaining RBs in COT 501. To resume transmissions within COT 501, the COT-initiating UE (UE1) identifies which RB sets #0-#2 have been shared with other UEs based on the received PSFCH. As noted above, the responding UEs (UE0 and UEs 2 through UE 5) identify whether to share COT 501 by identifying at least one PSFCH scheduled for the COT-initiating UE (UE1) in a slot or symbol of one of the RB sets #0-#2. The COT shared identifier procedure does not guarantee that a PSFCH transmission associated with the COT-initiating UE (UE1) will exist in each RB set #0-#2 of COT 501. Therefore, if the COT-initiating UE (UE1) does not receive a PSFCH transmission in the slot or symbol of any RB set #0-#2, the COT-initiating UE will avoid that RB set for the remainder of COT 501 or lose its transmission privileges for that RB set.

[0105] like Figure 5 As illustrated, within PSSCH slot 505, UE0 receives PSSCH transmissions from UE4 (>UE4) and UE5 (>UE5) from UE5 in RB set #2, and from COT-initiating UE (UE1) (>UE1), UE2 (>UE2), and UE3 (>UE3) from UE3 in RB set #1. UE0 does not receive any PSSCH in RB set #0. UE0 schedules PSSCH transmissions corresponding to the received PSSCHs (>UE1, >UE2, >UE3, >UE4, and >UE5) for PSSCH symbol 504. The scheduled PSSCH transmissions are reflected in scheduled PSSCH 506a. For illustrative purposes, each PSSCH scheduled by UE0 carries the same information, such as all carrying HARQ-ACK information or all carrying collision indication information. According to the ascending priority rule, the priority of the scheduled PSSCH transmissions in scheduled PSSCH 506a corresponds to the relationship in the following equation:

[0106] PSFCH2 = PSFCH5 > PSFCH4 > PSFCH3 > PSFCH1 (6)

[0107] In this scenario, the COT-initiating UE (UE1) receives the PSFCH from RB set #1 instead of either RB set #0 or #2. Therefore, the COT-initiating UE (UE1) will avoid retransmissions in either RB set #0 or #2, or lose access to these retransmissions.

[0108] In an optional aspect of this disclosure, when any of the responding UEs (UE0 and UEs 2 to UE 5) identifies one or more scheduled PSFCHs to other UEs in one or more RB sets #0-#2 and there are no scheduled PSFCHs in those RB sets associated with the COT-initiating UE (UE1), the responding UE (UE0 or any of UEs 2 to UE 5) will repeatedly send the PSFCHs of the COT-initiating UE (UE1) in those RB sets where no such COT-initiating UE-associated PSFCH is scheduled. For example, as illustrated in the scheduled PSFCH 506b, since UE0 is identified in RB set #2, UE0 has scheduled PSFCH (PSFCH4) to UE4 and PSFCH (PSFCH5) to UE5, but not PSFCH to UE1. Therefore, UE0 schedules a duplicate PSFCH transmission (PSFCH1-1), which is a duplicate of the PSFCH (PSFCH1) associated with UE1 in RB set #1. The optional aspect of the duplicate PSFCH to the COT-initiating UE (UE1) ensures that each RB set occupied by the responding UE (UE0) in the shared broadband COT (COT 501) has at least one PSFCH for the COT-initiating UE (UE1). For the purposes of this optional aspect, each PSFCH scheduled by UE0 carries the same information, such as all carrying HARQ-ACK information or all carrying collision indication information. According to the ascending priority rule, the priority of the scheduled PSFCH transmissions in the scheduled PSFCH506b corresponds to the following relationship:

[0109] PSFCH2=PSFCH5>PSFCH4>PSFCH3>PSFCH1=PSFCH1-1 (7)

[0110] The value Y is used to represent the PSFCH index of a specific PSFCH, and regarding Figure 5 The illustrated example aspect is identified by an index of a specific PSFCH, which ensures that each RB set in the shared broadband COT (COT 501) occupied by the responding UE (UE0) has at least one PSFCH for the COT-initiating UE (UE1), where, according to equation (7), Y = 6, such that N Tx,PSFCH≥6. Since UE0 can send both the PSFCH associated with UE1 in RB set #1 (PSFCH1) and the PSFCH associated with UE1 in RB set #2 (PSFCH1-1), UE1 will identify the PSFCH received in RB sets #1 and #2, and will only avoid RB set #0 or lose the right to resume sending to RB set #0.

[0111] In one specific implementation of the optional aspect, the responding UE (UE0) determines N based on whether each RB set occupied by the responding UE (UE0) in COT 501 has at least one PSFCH for the COT initiating UE (UE1). TX,PSFCH The value of . This determination results in the priority of the PSFCH indicated in equation (7), where the number of PSFCHs N actually sent is . Tx,PSFCH For at least 6 (N) Tx,PSFCH ≥6).

[0112] In another specific implementation of the optional aspect, the responding UE (UE0) selects the actual number N of PSFCHs to be transmitted. TX,PSFCH This ensures that each RB set occupied by UE0 in COT 501 has at least one PSFCH for the COT initiator. Based on the relationship in the following equation, this different implementation results in different priorities:

[0113] PSFCH1=PSFCH1-1>PSFCH2=PSFCH5>PSFCH4>PSFCH3 (8)

[0114] The PSFCH associated with UE1 in RB set #1 (PSFCH1) and the repeated PSFCH for UE1 in RB set #2 (PSFCH1-1) are increased in the order of transmission to increase the probability of these PSFCHs being transmitted when the maximum number of PSFCHs will be less than the number of scheduled PSFCHs.

[0115] It should be noted that when there is more than one PFSCH for UE scheduling initiated by the responding UE for COT, the responding UE selects to repeat the PFSCH corresponding to the PSSCH with the highest or lowest priority value.

[0116] Figure 6AThis is a block diagram illustrating an example SL-U network 60 including UE0-UE5, configured to support PSFCH-based COT sharing and recovery in SL-U broadband operation according to one or more aspects. SL-U network 60 includes a broadband SL-U channel 600. UE1 establishes a COT 601 within the broadband SL-U channel 600, including RB sets #0-#1. UE1 sends a COT-SI including information about COT 601, which includes an indication of whether COT sharing for COT 601 is permitted and whether COT 601 allows PSFCH transmission, PSSCH transmission, or both. The COT-SI also includes an indication of the required sharing bandwidth, which can be configured by the indication to define a specified number of RB sets from the total RB set of the COT that must be occupied by the responding UE identifying the COT to be shared, or the entire broadband SL-U channel 600 that must be occupied, including all RB sets constituting COT 601. PSFCH symbols 603 and 604 provide feedback symbols that can be used by the COT-initiating UE (UE1) and other UEs sharing COT 601 to provide feedback to any received PSSCH included in PSSCH slot 605.

[0117] It should be noted that when identifying a specific set of RBs for the required shared bandwidth, the specific set of RBs in the total broadband SL-U channel 600 can be dynamically selected by the COT-initiating UE (UE1) based on various factors such as scheduled transmissions and channel quality information. Alternatively, the serving network entity within the coverage area can specify a specific set of RBs within the total broadband SL-U channel 600 for the required shared bandwidth.

[0118] exist Figure 6A In the first optional aspect illustrated, the COT-initiating UE (UE1) may communicate with the non-COT-initiating UE (UE0) via PSSCH (>UE1) within PSSCH slot 605. Therefore, when the PSSCH associated with the COT-initiating UE (UE1) can occupy each set of RBs requiring shared bandwidth, UE1 shares COT 601 with those responding UEs. Figure 6AThe illustrated second alternative aspect involves the responding UEs identifying when they can share COT 601 when they identify one of the PSFCHs scheduled by these responding UEs in each RB of the required shared bandwidth and identify at least one PSFCH transmission associated with UE1 in a symbol or slot within RB set #0 or RB set #1 of COT 601. For example, the COT-SI from the COT-initiating UE (UE1) identifies the wideband bandwidth of COT 601 (RB sets #0-#1) as the required shared bandwidth. UE0 receives PSFCHs from UE1 through UE5 respectively during PSFCH slot 605 (>UE1, >UE2, >UE3, >UE4, and >UE5), and will therefore have a corresponding PSFCH for transmission during PSFCH symbol 604. Therefore, UE0, as the responding UE, will identify PSFCH1, PSFCH2, and PSFCH3 for transmission in RB set #0 and PSFCH4 and PSFCH5 for transmission in RB set #1 within the scheduled PSFCH 606. The responding UE (UE0) identifies itself as being able to share COT 601 because it has PSFCH transmissions that can occupy the required shared bandwidth of COT 601 and has at least one PSFCH associated with UE1 within RB set #0.

[0119] The responding UE (UE1) identifies the number N of PSFCHs actually transmitted based on whether the PSFCH transmission can occupy the required shared bandwidth for each RB set and at least one PSFCH transmission from UE0 to UE1 within the RB set corresponding to COT 601. TX,PSFCH In the first example scenario, when the actual number N of PSFCHs sent... Tx,PSFCH Exceeding the maximum number N of simultaneous PSFCH Tx,PSFCH ≤N max,PSFCH Furthermore, when the parameter dl-P0-PSFCH is configured, if the total transmission power N of the scheduled PSFCH transmissions is... sch,Tx,PSFCH Greater than the maximum transmit power P CMAX The actual number of PSFCHs sent can be determined according to the following equation:

[0120] N Tx, PSFCH ≥X≥1 (9)

[0121] in K indicates that the total transmit power of all X PSFCHs is not greater than P. CMAX The maximum value, M iY represents the number of PSFCHs with a priority field value i, and Y represents the PSFCH index for a specific PSFCH, where PSFCHs are indexed according to an ascending priority rule based on the type of information carried by the PSFCH. For PSFCH transmissions with the same priority, the PSFCH transmissions can be indexed based on the time-domain and / or frequency-domain location of their associated PSSCH transmissions.

[0122] exist Figure 6A In the illustrated first alternative implementation, a particular PSFCH may be identified as the first PSFCH that ensures at least one PSFCH is transmitted in each RB set of the required shared bandwidth of COT 601. Figure 6A In the second alternative embodiment illustrated, a particular PSFCH may be identified as a first PSFCH that ensures at least one PSFCH is transmitted in each RB set of the required shared bandwidth of COT 601 and that at least one PSFCH associated with the COT-initiating UE (UE1) is transmitted in COT 601.

[0123] The responding UE (UE0) considers the type of information carried by the PSFCH and selects the number of PSFCHs to schedule based on an ascending priority rule. UE0 then selects the scheduled PSFCHs according to the relationship in the following equation:

[0124] PSFCH2>PSFCH4=PSFCH5>PSFCH3>PSFCH1 (10)

[0125] The following equation can be used based on the maximum transmission power P. CMAX Calculate the transmitted power for all five PSFCHs used in equation (10):

[0126] P PSFCH +P PSFCH4 +P PSFCH5 +P PSFCH +P PSFCH >P CMAX (11) Therefore, the transmit power N of all five scheduled PSFCHs sch,Tx,PSFCH Exceeding the maximum transmission power P CMAX For the purposes of this example, and while the maximum number of PSFCHs is set to five, N max,PSFCH =5. Therefore, the number N of scheduled PSFCHs is 5. sch,Tx,PSFCH It also exceeds the maximum number N of PSFCH at the same time. max,PSFCH .

[0127] The UE (UE0) responds and can then select N from equation (10). max,PSFCH PSFCH to conform to N max,PSFCH=5 limit. Based on the priority illustrated in equation (10), UE0 will target N Tx,PSFCH Each PSFCH can be selected from PSFCH2, PSFCH4, PSFCH5, PSFCH3, and PSFCH1. The total transmit power P of all such PSFCHs is given in the following equation. CMAX It can be calculated based on the maximum transmission power:

[0128] P PSFCH +P PSF +P PSFCH +P PSFCH3 +P PSFCH ≤ P CMAX (12) in Of the five PSFCHs to be sent, two PSFCHs (PSFCH4 and PSFCH5) share the same priority; therefore, M i The value reflects M1 = 1 (PSFCH2), M2 = 2 (PSFCH4 and PSFCH5), M3 = 1 (PSFCH3), and M4 = 1 (PSFCH1), such that M1 + M2 + M3 + M4 = 5. When determining Y according to the first alternative embodiment, UE0 identifies the PSFCH occupying RB set #0 and the PSFCH occupying RB set #1, which satisfies the constraint of each RB set within the required shared bandwidth of COT 601. Therefore, according to the first alternative embodiment, UE0 determines Y = 2. Equation

[0129] When determining Y according to the second alternative implementation, the UE0 identifier not only occupies the PSFCH of each RB set (RB set #0 and RB set #1) in COT 601, but also identifies at least one PSFCH within COT 601 associated with the COT-initiating UE (UE1). Based on the priority of PSFCH in equation (10), PSFCH1 is the last in priority, therefore Y = 5. However, since Y = 5 > N max,PSFCH Therefore, Y will also be based on To determine. Therefore, the equation

[0130] exist Figure 6A In the second example scenario illustrated, when the number N of PSFCHs scheduled... sch,Tx,PSFCH Exceeding the maximum number N of simultaneous PSFCH sch,Tx,PSFCH >N max,PSFCH Furthermore, when parameter dl-P0-PSFCH is configured, the responding UE (UE0) first selects N based on the ascending priority rule. max,PSFCH PSFCH, then from N max,PSFCHSelect the actual number of PSFCHNs from the PSFCHs. Tx,PSFCH , where N Tx,PSFCH ≥X≥1 and Where K represents the total transmit power of all X PSFCHs not exceeding P. CMAX The maximum value of M, and M i The number of PSFCHs with priority field value i, and if the PSFCH index is not greater than N. max,PSFCH If Y represents the PSFCH index of a specific PSFCH, then Y represents the PSFCH index of that specific PSFCH; otherwise...

[0131] It should be noted that a particular PSFCH may be identified according to the first alternative implementation or the second alternative implementation mentioned above.

[0132] exist Figure 6A In the third example scenario illustrated, when the parameter dl-P0-PSFCH is not configured, the responding UE (UE0) selects N based on an ascending priority rule. Tx,PSFCH The actual number of PSFCHs sent can be determined according to the following equation:

[0133] N Tx, PSFCH ≥Y≥1 (13) where Y represents the PSFCH index of a particular PSFCH, which may also be determined according to the first alternative implementation or the second alternative implementation mentioned above.

[0134] exist Figure 6A The illustrated third alternative aspect involves the UE (UE0) selecting N based on whether each set of RBs can occupy the required shared bandwidth via PSFCH transmission. Tx,PSFCH At least one PSFCH transmission of UE0 associated with the COT-initiated UE (UE1) is sent within a symbol or time slot of the RB set in COT 601. Figure 6A In another example scenario illustrated, when the number N PSFCHs scheduled... sch,Tx,PSFCH Less than or equal to the maximum number N sent simultaneously sch,Tx,PSFCH ≤N max,PSFCH And when the parameter dl-P0-PSFCH has been configured, if N sc,Tx,PSFCH The total transmit power of each PSFCH is greater than P CMAX Then UE0 selects N based on one of the following rules. Tx,PSFCH N PSFCH, where N TX,PSFCH ≥X≥1, Where K represents the total transmit power of all X PSFCHs not exceeding P. CMAXThe maximum value, M i This indicates the number of PSFCHs with priority field value i, and if the PSFCH index is not greater than N. max,PSFCH If Y represents the PSFCH index of a specific PSFCH, then Y represents the PSFCH index of that specific PSFCH; otherwise,

[0135] exist Figure 6A In one of the illustrated alternative implementations, if the scheduled N sc,Tx,PSFCH The total transmit power of the PSFCHs exceeds the maximum transmit power P. CMAX Based on the set of RBs requiring shared bandwidth, the responding UE (UE0) can first select the PSFCH associated with the lowest priority field value of the corresponding PSFCH in the scheduled PSFCH 606, or the PSFCH associated with the earliest slot when there are multiple intra-COT PSFCHs with the same priority for the scheduled PSFCH 606. Then, based on the corresponding priority field value of the remaining scheduled PSFCH transmissions (if any) carrying HARQ-ACK information in the scheduled PSFCH 606, it can use an ascending priority rule, and then use the ascending priority rule of the priority field value of the remaining scheduled PSFCH transmissions (if any) carrying conflict indication information in the scheduled PSFCH 606 ​​to select the PSFCH among the remaining scheduled PSFCH transmissions in the scheduled PSFCH 606.

[0136] exist Figure 6A In another alternative implementation illustrated, if the scheduled N sch,Tx,PSFCH The total transmit power of the PSFCHs (the scheduled PSFCH 606) exceeds the maximum transmit power P. CMAXThen, the responding UE (UE0) may first select the PSFCH associated with the lowest priority field value of the corresponding PSFCH in the scheduled PSFCH 606 ​​or the PSFCH associated with the earliest time slot when there are multiple scheduled PSFCHs with the same priority for PSFCH transmission in the scheduled PSFCH 606 ​​associated with the COT-initiating UE (UE1). Then, except for one or more RB sets of the remaining RB sets (RB set #0 and RB set #1) of COT 601 that have PSFCHs associated with the COT-initiating UE (UE1) for the required shared bandwidth, the UE may select the PSFCH associated with the lowest priority field value of the remaining PSFCH in the scheduled PSFCH 606 ​​by RB set, or select the PSFCH associated with the earliest time slot when there are multiple COT-intra-PSFCHs with the same priority by RB set. The responding UE (UE0) can then use the ascending priority rule of the corresponding priority field value of the remaining PSFCH transmission (if any) carrying HARQ-ACK information in the scheduled PSFCH 606, and then use the ascending priority rule of the remaining PSFCH transmission (if any) carrying conflict indication information in the scheduled PSFCH 606 ​​to select a PSFCH on the remaining PSFCH transmission of the scheduled PSFCH 606.

[0137] exist Figure 6A In another example scenario illustrated, when the number N PSFCHs scheduled... sch,Tx,PSFCH Exceeding the maximum number N of simultaneous PSFCH sc,Tx,PSFCH >N max,PSFCH And when parameter dl-P0-PSFCH has been configured, the responding UE (UE0) can select N as follows. max,PSFCH PSFCH: (1) Based on the ascending priority rule of multiple scheduled PSFCHs, the maximum number of selected PSFCHs N is N. Tx,PSFCH This number is based on the number N of scheduled PSFCHs in each RB set occupied by PSFCHs scheduled by one or more addressing COTs for UEs. sch,Tx,PSFCH To determine, or (2) to ensure N Tx,PSFCH At least one PSFCH of the addressing COT-initiated UE is transmitted in each RB set occupied by the PSFCH transmission of the responding UE (UE0) in COT 601, wherein the number N of multiple selected PSFCHs is... Tx,PSFCH ≥X≥1, where And the total transmit power P of multiple selected PSFCHs Tx,PSFCH Less than or equal to the maximum transmit power P CMAX .

[0138] exist Figure 6A In another example scenario illustrated, when the parameter dl-P0-PSFCH has not yet been configured, the responding UE (UE0) can select N as follows. Tx,PSFCH Sending one PSFCH: (1) According to the ascending priority rule of multiple scheduled PSFCHs, up to a maximum of N selected PSFCHs. Tx,PSFCH This number is based on the number N of scheduled PSFCHs in each RB set occupied by PSFCHs scheduled by one or more addressing COTs for UEs. sch,Tx,PSFCH To determine, or (2) to ensure N Tx,PSFCH At least one PSFCH of the addressing COT-initiated UE is transmitted in each RB set occupied by the PSFCH transmission of the responding UE (UE0) in COT 601, wherein the number N of multiple selected PSFCHs is... Tx,PSFCH ≥X≥1, where And the total transmit power P of multiple selected PSFCHs Tx,PSFCH Less than or equal to the maximum transmit power P CMAX .

[0139] For the purposes of this other example scenario, and with the maximum number of PSFCHs set to four, N max,PSFCH =4. The responding UE (UE0) uses an ascending priority rule to prioritize PSFCH transmission based on the type of information carried by the PSFCH in the scheduled PSFCH 606. In this other example scenario, UE0 identifies the priority of PSFCH transmission according to the relationship in the following equation:

[0140] PSFCH2=PSFCH5>PSFCH4>PSFCH3>PSFCH1 (14)

[0141] According to an alternative implementation described above, UE0 can select four PSFCHs based on the priority of the PSFCHs in equation (14) by prioritizing the occupancy of the required shared bandwidth by at least one PSFCH in each of RB set #0 and RB set #1. Therefore, UE0 will select PSFCH2, PSFCH5, PSFCH4, and PSFCH3 for transmission.

[0142] Conversely, according to another alternative implementation noted above, UE0 can select four PSFCHs based on the priority of the PSFCHs in equation (14) by not only prioritizing the occupancy of the required shared bandwidth but also by ensuring that at least one PSFCH associated with the COT-initiating UE (UE1) is within at least one RB set of the required shared bandwidth. Therefore, UE0 will select PSFCH1, PSFCH5, PSFCH2, and PSFCH4 for transmission.

[0143] Figure 6B This is a block diagram illustrating an example SL-U network 61, including UE0-UE5, configured to support PSFCH-based COT sharing and recovery in SL-U broadband operation according to one or more aspects. SL-U network 61 includes a broadband SL-U channel 600. UE1 establishes a COT 601 within the broadband SL-U channel 600, including RB sets #0-#1. UE1 will transmit a COT-SI including information about COT 601, which includes an indication of whether COT sharing for COT 601 is permitted and whether COT 601 allows PSFCH transmission, PSSCH transmission, or both. PSFCH symbols 603 and 604 provide feedback symbols for the COT initiating UE (UE1) and other UEs sharing COT 601 to provide feedback to any received PSSCH included in PSSCH slot 605.

[0144] Partial sharing can be based on various conditions. In some respects, partial sharing can always be allowed. In such cases, a non-COT-initiating UE (UE0 and UEs 2 through UE5) can transmit a shared COT 601 PSFCH, wherein such a non-COT-initiating UE satisfies the basic condition of having at least one PSFCH associated with the COT-initiating UE (UE1) in a slot or symbol within COT 601. Alternatively, the COT-initiating UE (UE1) can adjust partial sharing based on the priority between the PSFCH and PSSCH to be transmitted by UE1. In such an alternative, the COT-initiating UE (UE1) can select the highest priority among the PSFCH and PSSCH to be transmitted by UE1 within either RB set #0 or RB set #1 of COT 601. Partial sharing is allowed when PSFCH transmission has a higher priority than PSSCH transmission. Otherwise, the COT-initiating UE (UE1) includes an indication of the required shared bandwidth in the COT-SI, which can be configured by the indication to require the responding UE to occupy a specified number of RBs in the total RB set associated with the COT in order to partially share the specified number of RBs in COT 601.

[0145] In either of the aspects where partial sharing is always permitted, or in an alternative aspect where the COT-initiating UE (UE1) is identified to allow partial sharing when conditions are met, such as when a PSFCH scheduled by UE1 has a higher priority than a PSSCH scheduled by UE1 within COT 601, non-COT-initiating UEs (UE0 and UE2 to UE5) may identify whether these non-COT-initiating UEs are permitted to share COT 601 based on the following condition: at least one PSFCH of the non-COT-initiating UE associated with the COT-initiating UE (UE1) will be transmitted within a slot or symbol within COT 601.

[0146] like Figure 6B As illustrated, UE0 receives multiple PSSCHs in PSSCH slot 605 and will have a responsive PSFCH for PSFCH symbol 604. In response, UE0 identifies the PSFCHs scheduled for PSFCH 606 ​​as PSFCH1, PSFCH2, and PSFCH3 in RB set #0 and PSFCH4 and PSFCH5 in RB set #1, and identifies that UE0 can share COT 601. Then, UE0 can prioritize the scheduled PSFCHs in scheduled PSFCH 606 ​​based on the type of information carried by the PSFCH using an ascending priority rule. UE0 will determine the priority of the PSFCHs according to the relationship reflected in the following equation:

[0147] PSFCH2>PSFCH1=PSFCH3>PSFCH4>PSFCH5 (15)

[0148] For the purpose of illustrating specific implementations, and also for the maximum number N of PSFCHs max,PSFCH Set to three, N max,PSFCH =3. Therefore, UE0 will select the following three PSFCHs for transmission according to the priority indicated in equation (15): PSFCH2, PSFCH1, and PSFCH3, all of which are scheduled for transmission in RB set #0. When the COT-initiating UE (UE1) identifies that the COT-initiating UE wants to resume transmission in COT 601, the COT-initiating UE will identify the RB set in which the COT-initiating UE received the PSFCH in order to identify which RB sets in COT 601 have been shared. Because UE1 received the PSFCH in RB set #0 instead of RB set #1, UE1 will avoid RB set #1 or lose the right to transmit in RB set #1 for the remainder of COT 601.

[0149] In an alternative aspect, where the COT-initiating UE (UE1) identifier has not yet met the conditions for partial sharing, such as in some aspects, where UE1 discovers that the priority of the PSSCH scheduled by UE1 is higher than the priority of the PSFCH within COT 601, the COT-initiating UE (UE1) adds an indication to COT-SI for the required shared bandwidth, which, for the purposes of the specific implementation of the described example, can be configured by the indication to be occupied by the responding UE in COT 601 in order to partially share the entire SL-U broadband bandwidth of COT 601, including RB set #0 and RB set #1.

[0150] In response, UE0 identifies the PSFCH scheduled for PSFCH 606 ​​and then prioritizes the scheduled PSFCH based on the type of information carried by the PSFCH using an ascending priority rule. UE0 will obtain the priority of the PSFCH according to the relationship reflected in equation (15). For the purposes of the specific implementation of the described example, the maximum number N of PSFCHs sent simultaneously is... max,PSFCH Set to three, N max,PSFCH =3. When the PSFCH to be sent is identified from the preferred PSFCH in equation (15) according to the first alternative implementation described above, UE0 will, according to N Tx,PSFCH ≥X≥1 indicates the actual number N of PSFCHs sent. Tx,PSFCH ,in K indicates that the total transmit power of all X PSFCHs is not greater than P. CMAX The maximum value, M i Y represents the number of PSFCHs with priority field value i, and Y represents the PSFCH index of a particular PSFCH, where the PSFCHs are indexed according to an ascending priority rule based on the type of information carried by the PSFCH. In this first alternative embodiment, UE0 determines that Y = 4 and X = 4, and therefore selects the following four PSFCHs for transmission: PSFCH2, PSFCH1, PSFCH3, and PSFCH4. When identifying the PSFCHs for transmission from the preferred PSFCHs in equation (15) according to the second alternative embodiment described above, UE0 will again select the PSFCHs according to N. Tx,PSFCH ≥X≥1 indicates the actual number N of PSFCHs sent. Tx,PSFCH ,in This again results in Y=4 and X=4. Because one of the higher priority PSFCHs includes PSFCH1 associated with the COT-initiating UE (UE1), which will be transmitted within COT 601, UE0 will select the following four identical PSFCHs for transmission: PSFCH2, PSFCH1, PSFCH3, and PSFCH4.

[0151] UE0 can also use an alternative implementation discussed above to select the number of PSFCHs actually transmitted. In this implementation, UE0 determines the scheduled N. sch,Tx,PSFCH The total transmit power of the PSFCHs exceeds the maximum transmit power P. CMAX In this case, UE0 selects N from the PSFCH of the preferred scheduling in equation (15). max,PSFCH Each PSFCH is sent to further prioritize the use of the required shared bandwidth. Therefore, UE0 will select PSFCH2, PSFCH4, and PSFCH1.

[0152] UE0 can also use another alternative implementation discussed above to select the number of PSFCHs actually transmitted. In this implementation, UE0 determines the scheduled N. sch,Tx,PSFCH The total transmit power of the PSFCHs (the scheduled PSFCH 606) exceeds the maximum transmit power P. CMAX In response, the responding UE (UE0) selects N from the PSFCH of the preferred scheduling in equation (15). max,PSFCH The system prioritizes both the required shared bandwidth usage and at least one PSFCH transmission associated with the COT-initiated UE (UE1). Therefore, UE0 will select PSFCH1, PSFCH4, and PSFCH2 for transmission.

[0153] Figure 7 This is a block diagram of an example UE 115 supporting PSFCH-based COT sharing and recovery in SL-U broadband operations, based on one or more aspects. UE 115 can be configured to perform operations, including referencing... Figure 4A and Figure 4B The described process is a box. In some specific implementations, UE 115 includes references. Figures 1 to 3 The UE 115 shows and describes its structure, hardware, and components. For example, UE 115 includes a controller 280 that operates to execute logical or computer instructions stored in memory 282, and components that control UE 115 to provide its features and functionality. Under the control of controller 280, UE 115 transmits and receives signals via radio components 700a-r and antennas 252a-r. Radio components 700a-r include, for example... Figure 2 The various components and hardware exemplified for UE 115 include modulators and demodulators 254a-r, MIMO detector 256, receiver processor 258, transmitter processor 264, and TX MIMO processor 266.

[0154] As shown in the figure, memory 282 may include SL-U communication logic 701, SL resource configuration 702, SL feedback logic 703, and COT sharing logic 704. When executed by controller 280, SL-U communication logic 701 enables UE 115 to perform sidelink communication on unlicensed spectrum using radio components 700a-r and antennas 252a-r. The execution environment of SL-U communication logic 701 will enable UE 115, as a COT-initiating UE, to implement SL-U broadband COT in some cases after performing LBT procedures using the SL resource allocation found in SL resource configuration 702 in memory 282, and to transmit within the COT via radio components 700a-r and antennas 252a-r. In response to the UE, the execution environment of SL-U communication logic 701 enables sidelink communication on unlicensed spectrum, recognizing the structure of a specific SL-U broadband COT received via antenna 252a-r and radio component 700a-r, and identifying the COT-SI message indicating whether the COT can be shared. When executed by controller 280, SL feedback logic 703 enables UE 115, as the COT initiating UE, to detect PSFCH feedback transmitted by the responding UE that sent a PSSCH message within the COT via radio component 700a-r and antenna 252a-r. For UE 115 as the responding UE, the execution environment of SL feedback logic 703 enables UE 115 to generate a PSFCH in response to the PSSCH received from the COT initiating UE. When executed by controller 280, COT sharing logic 704 enables UE 115 as the responding UE to identify when and how to share the COT. For example, when UE 115 identifies, within the execution environment of SL communication logic 701 and SL feedback logic 703, that the UE has a PSFCH for transmission in the COT based on a PSSCH message received earlier in the COT within the execution environment of COT sharing logic 704, UE 115 identifies whether at least one such PSFCH is associated with a COT-initiating UE and will be transmitted within at least one RB set in the RB set constituting the COT. UE 115 can then... Figures 1 to 3 One or more neighboring UEs, such as UE 115b, or other network entities, such as network entity 105 or base station 140, receive signals or send signals to the one or more neighboring UEs.

[0155] The execution environment of SL-U communication logic 701 and SL feedback logic 703 implements features and functionality for UE 115 to support PSFCH-based COT sharing and recovery in SL-U broadband operation, according to one or more aspects. The execution environment of SL-U communication logic 701 enables UE 115 to perform sidelink communication on unlicensed spectrum using radio components 700a-r and antennas 252a-r. UE 115, acting as a COT-initiating UE, can combine the execution environment of SL-U communication logic 701 at SL resource configuration 702 to use resource configuration stored in memory 282 to enable SL-U broadband COT to perform such SL-U communication. SL-U communication may include transmissions such as PSFCHs associated with neighboring UEs. The execution environment of SL feedback logic 703 enables UE 115, when acting as a COT-initiating UE, to identify feedback transmissions, such as PSFCHs, received from one or more neighboring UEs. For example, by using one or more PSSCHs sent from UE 115 to at least one other neighboring UE, UE 115 can expect to receive PSFCHs from those neighboring UEs within the execution environment of SL feedback logic 303.

[0156] When acting as a non-COT-initiating UE or responding UE, UE 115 can also execute SL-U communication logic 701 and SL feedback logic 703 via processor 282. This enables UE 115, acting as a non-COT-initiating UE or responding UE, to perform sidelink communication on unlicensed spectrum using radio components 700a-r and antennas 252a-r, in conjunction with the SL resource allocation stored in SL resource configuration 702 at memory 282. Within the execution environment of SL-U communication logic 701, UE 115 is expected to receive a COT-SI message, which identifies the wideband SL-U bandwidth of the COT enabled by the COT-initiating UE. The COT-SI message may indicate whether the COT established through COT initiation can be shared. UE 115, acting as a non-COT-initiating UE or responding UE, can further receive PSSCH from another UE, including the COT-initiating UE, via radio components 700a-r and antennas 252a-r. Within the execution environment of SL-U communication logic 701, SL feedback logic 703, and COT sharing logic 704, UE 115, as a response to UE operation, can generate a feedback message for the transmission of PSFCH, indicating whether the PSFCH symbol of COT can be shared, and then share COT by sending PSFCH messages to other UEs, including the COT initiating UE, via radio components 700a-r and antenna 252a-r.

[0157] When UE 115, acting as the COT initiating UE, identifies that it wants to resume transmission within the COT, within the execution environment of SL-U communication logic 701 and SL feedback logic 703, UE 115 can identify which RB sets among the multiple RB sets of the SL-U broadband COT have been shared. This identification can be performed when it is detected that UE 115 has received any PSFCH on which RB sets. Once UE 115, acting as the COT initiating UE, identifies the shared RB sets within the SL-U broadband COT, the UE can use radio components 700a-r and antenna 252a-r to resume transmission on the available RBs in those shared RB sets.

[0158] It should be noted that, for reference Figure 4A and Figure 4B The described one or more boxes (or operations) may be combined with one or more boxes (or operations) described with reference to another figure. For example, Figure 4A One or more boxes (or operations) can be connected with Figure 5 A combination of one or more boxes (or operations). For example, with... Figure 4B One or more associated boxes can be connected with and Figure 6B A group of one or more related boxes. For example, with... Figure 4A and Figure 4B One or more associated boxes can be connected with and Figures 1 to 3 A combination of one or more related boxes (or operations). Additionally or alternatively, see above for reference. Figures 1 to 3 One or more operations described can be compared with the reference Figure 7 The described combination of one or more operations.

[0159] In one or more aspects, techniques for supporting PSFCH-based COT sharing and recovery in SL-U broadband operation may include additional aspects, such as any single aspect or any combination of aspects described below or in conjunction with one or more other processes or devices described elsewhere herein. In a first aspect, supporting PSFCH-based COT sharing and recovery in SL-U broadband operation may include an apparatus such as a UE capable of SL-U communication, configured to establish a COT with a broadband operating frequency associated with multiple RB sets, and to transmit a COT-SI message on the SL-U channel, the COT-SI message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing PSFCH transmission. The UE may complete the first transmission within a portion of the COT, but then identify a second transmission to update the transmission within the COT. The UE may identify one or more shared RB sets from the multiple RB sets and use one or more available RBs within the one or more shared RB sets to transmit the second transmission.

[0160] Additionally, the device may perform or operate according to one or more aspects described below. In some embodiments, the device includes a wireless device, such as a UE. In some embodiments, the device may include at least one processor and memory coupled to the processor. The processor may be configured to perform the operations described herein with respect to the device. In some other embodiments, the device may include a non-transitory computer-readable medium having program code recorded thereon, and the program code may be executable by a computer to cause the computer to perform the operations described herein with reference to the device. In some embodiments, the device may include one or more components configured to perform the operations described herein. In some embodiments, a method of wireless communication may include one or more operations described herein with reference to the device.

[0161] In a second aspect, in combination with the first aspect, at least one processor that is operable to enable the UE to identify the one or more shared RB sets is further operable to enable the UE to: detect at least one PSFCH from at least one of the one or more adjacent UEs within the one or more shared RB sets.

[0162] In a third aspect, in combination with one or more of the first or second aspects, the COT-SI message further includes: a third indication identifying the required shared bandwidth that the COT needs to be occupied by any of the one or more adjacent UEs, the required shared bandwidth including one of the following: a designated set of RB sets in the plurality of RB sets, or the broadband operating frequency.

[0163] In a fourth aspect, in conjunction with the third aspect, the at least one processor is operable to cause the UE to: send a sidelink control information (SCI) message, the sidelink control information (SCI) message including a priority indicator identifying the priority associated with the UE transmission of the corresponding PSSCH in the one or more PSSCHs; and send one or more physical sidelink shared channels (PSSCHs) to at least one non-COT initiating UE among the one or more neighboring UEs.

[0164] In a fifth aspect, in combination with one or more of the first to fourth aspects, the at least one processor is operable to cause the UE to: decide to avoid including the first indication in the COT-SI in response to the determination that an unscheduled PSSCH within a plurality of Physical Side Link Shared Channel (PSSCH) slots in the COT is associated with the plurality of neighboring UEs; and decide to include the first indication in the COT-SI in response to at least one scheduled PSSCH among the plurality of neighboring UEs being associated with at least one neighboring UE among the plurality of neighboring UEs.

[0165] A sixth aspect may include an apparatus for wireless communication at a UE, the apparatus including at least one memory; and at least one processor coupled to the at least one memory. The at least one processor is operable to cause the UE to: receive a COT-SI message from a COT-initiating UE, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with a plurality of RB sets and a second indication allowing the transmission of PSFCHs; identify at least one selected PSFCH for transmission from a plurality of selected PSFCHs within RBs in the plurality of RB sets and associated with the COT-initiating UE; and transmit one or more selected PSFCHs from at least one of the plurality of selected PSFCHs in the plurality of RB sets on an SL-U channel.

[0166] In a seventh aspect, in conjunction with the sixth aspect, the at least one processor is operable to cause the UE to: identify one or more RB sets among the plurality of RB sets, wherein at least one of the plurality of selected PSFCHs addresses a PSFCH of a non-COT-initiating UE located in the one or more RB sets and none of the at least one selected PSFCHs among the plurality of selected PSFCHs is located in the one or more RB sets; and repeat the transmission of the PSFCH of the at least one selected PSFCH associated with the COT-initiating UE in each of the one or more RB sets.

[0167] In an eighth aspect, in conjunction with the seventh aspect, the at least one processor is operable to cause the UE to: identify at least two addressable COT-initiating UE PSFCHs among the at least one selected PSFCHs associated with the COT-initiating UE; and select the addressable COT-initiating UE PSFCH from the at least two addressable COT-initiating UE PSFCHs according to the associated priority of the physical side link shared channel (PSSCH) corresponding to each of the at least two addressable COT-initiating UE PSFCHs, wherein the associated priority of the PSFCH corresponding to the addressable COT-initiating UE PSFCH is one of the following: highest priority PSFCH or lowest priority PSFCH.

[0168] In a ninth aspect, in combination with one or more of aspects seven to eight, the at least one processor is operable to cause the UE to: identify a plurality of scheduled PSFCHs on the plurality of RB sets, the plurality of scheduled PSFCHs including one or more scheduled PSFCHs of an addressing COT-initiated UE corresponding to the at least one selected PSFCH associated with the COT-initiated UE and the PSFCH of the addressing COT-initiated UE in each of the one or more RB sets; and select the plurality of selected PSFCHs from the plurality of scheduled PSFCHs, the total number of the plurality of selected PSFCHs being N. Tx,PSFCH The number N of scheduled PSFCHs in each RB set is determined by the PSFCHs of the UEs scheduled by the one or more addressing COTs. sch,Tx,PSFCH To choose.

[0169] In the tenth aspect, in combination with one or more of the seventh to ninth aspects, the at least one processor is operable to enable the UE to: identify a plurality of scheduled PSFCHs for transmission in the COT; and to ensure that at least one addressing COT-initiating UE's PSFCH selects the plurality of selected PSFCHs in each of the plurality of RB sets occupied by the UE's PSFCH transmission.

[0170] In the eleventh aspect, in combination with one or more of the sixth to tenth aspects, the COT-SI further includes a third indication identifying the required shared bandwidth that the UE needs to occupy when sharing the COT, the required shared bandwidth including one or more required RB sets corresponding to one of the following: a predefined set of RB sets among the plurality of RB sets, or the broadband operating frequency.

[0171] In a twelfth aspect, in conjunction with the eleventh aspect, the at least one processor is operable to cause the UE to: receive a Side Link Control Information (SCI) message from the COT-initiated UE, the SCI message including a priority indicator identifying the priority of a corresponding PSSCH associated with the UE in one or more PSSCHs, the priority being related to the COT-initiated UE transmission of the corresponding PSSCH; identify the highest priority among one or more PSFCHs to be transmitted by the UE within the COT and one or more Physical Side Link Shared Channels (PSSCHs) to be transmitted by the UE within the COT; identify that the COT can be partially shared in response to the one or more PSFCHs being identified as having the highest priority; and occupy the required shared bandwidth for PSFCH transmission in response to the one or more PSSCHs having the highest priority.

[0172] In the thirteenth aspect, in combination with one or more of the eleventh to twelfth aspects, the at least one processor is operable to cause the UE to: select from a plurality of scheduled PSFCHs a selected PSFCH for transmission to include at least one desired PSFCH for transmission in each desired RB set for desired shared bandwidth and to include at least one PSFCH of an addressing COT-initiated UE in at least one shared RB in the plurality of RB sets of the COT.

[0173] In the fourteenth aspect, in conjunction with the thirteenth aspect, the at least one processor is operable to cause the UE to: select the number N of the plurality of PSFCHs. Tx,PSFCH Choose ≥X≥1, where K is the total transmit power of all X selected PSFCHs among the multiple selected PSFCHs, which is no greater than P. CMAX The maximum value, M i Y is a defined number of PSFCHs with priority value i, and Y is the PSFCH index of a specific PSFCH. Each of the multiple selected PSFCHs is indexed according to an ascending priority rule. The at least one processor is operable to cause the UE to select the number N of the multiple selected PSFCHs. Tx,PSFCH It is performed in response to the following condition: the total transmit power P of the plurality of selected PSFCHs. Tx,PSFCH Greater than P CMAX The number N of the plurality of selected PSFCH Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFcHAn initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0174] In the fifteenth aspect, in conjunction with the fourteenth aspect, the at least one processor is operable to cause the UE to: index each of the plurality of selected PSFCHs according to one of the following: the time-domain position, frequency-domain position, or a combination thereof of the Physical Side Link Shared Channel (PSSCH) corresponding to each of the selected PSFCHs, wherein the at least one processor is operable to cause the UE to index each of the plurality of selected PSFCHs in response to two or more selected PSFCHs having the same priority under the ascending priority rule.

[0175] In the sixteenth aspect, in combination with one or more of aspects fourteen to fifteen, the specific PSFCH is identified as one of the following: a first selected PSFCH among the plurality of selected PSFCHs that ensures the at least one required PSFCH is transmitted within each of the one or more required RB sets, or a first selected PSFCH among the plurality of selected PSFCHs that ensures the at least one required PSFCH is transmitted within each of the required RB sets with required shared bandwidth, and the PSFCH of the at least one addressing COT-initiating UE is transmitted within the at least one shared RB in the plurality of RB sets of the COT.

[0176] In the seventeenth aspect, in combination with one or more of aspects eleven to sixteen, the at least one processor is operable to cause the UE to: select the number N of the plurality of PSFCHs. Tx,PSFCH Choose ≥X≥1, and the maximum number N of PSFCHs at any given time. max,PSFCH ,in K is the total transmit power of all X selected PSFCHs, which is no greater than P. CMAX The maximum value of, and Y is the PSFCH index of the specific PSFCH, and Y < the maximum number N of PSFCHs. max,PSFCH ,otherwise The at least one processor is operable to enable the UE to select the number N of the plurality of selected PSFCHs. Tx,PSFCH It is executed in response to the following condition: the number N of the plurality of scheduled PSFCHs. Tx,PSFCH Exceeding the maximum number of simultaneous PSFCH, N Tx,PSFCH >N max,PSFCHAn initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0177] In the eighteenth aspect, in combination with the seventeenth aspect, the at least one processor is operable to cause the UE to: select one of the plurality of selected PSFCHs according to the ascending priority rule, wherein the plurality of selected PSFCHs are selected as ≥Y′≥1, where Y′ is the PSFCH index of the particular PSFCH, and the at least one processor is operable to cause the UE to select one of the plurality of selected PSFCHs according to the ascending priority rule in response to the dl-P0-PSFCH not being configured at the UE.

[0178] In the nineteenth aspect, in combination with one or more of aspects eleven to eighteen, the at least one processor is operable to cause the UE to: select a number N of the plurality of selected PSFCHs according to the PSFCH selection sequence. Tx,PSFCH , PSFCH, where N Tx,PSFCH ≥X≥1, where The at least one processor is operable to enable the UE to select one of the plurality of selected PSFCHs according to the PSFCH selection sequence, which is performed in response to the following condition: the total transmit power P of the plurality of scheduled PSFCHs. sc,PSFCH Greater than the maximum transmit power P CMAX The number N of the multiple scheduled PSFCHs sc,Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0179] In a twentieth aspect, in conjunction with the nineteenth aspect, the PSFCH selection sequence includes the at least one processor, the at least one processor being operable to cause the UE to: select a first set of selected PSFCHs from the plurality of scheduled PSFCHs on a per RB basis in the one or more desired RB sets, each PSFCH in the first set of selected PSFCHs being associated with one of: the lowest priority or the earliest time slot according to an ascending priority rule; and, according to the ascending priority rule, first selecting a next set of selected PSFCHs on the remaining scheduled PSFCHs that contain hybrid automatic repeat request-acknowledgment (HARQ-ACK) information, and then selecting a PSFCH containing conflict information on the remaining scheduled PSFCHs.

[0180] In a twenty-first aspect, in combination with one or more of aspects nineteen and twentieth, the PSFCH selection sequence includes the at least one processor, the at least one processor being operable to cause the UE to: select from one or more COT-initiating UE-associated PSFCHs among the plurality of scheduled PSFCHs a first set of selected PSFCHs associated with one of the following: the lowest priority according to an ascending priority rule, or the earliest time slot; or select from one or more non-COT-initiating UE-associated RB sets among the plurality of scheduled PSFCHs that do not have an association with the COT-initiating UE. A second set of PSFCHs is selected from the remaining scheduled PSFCHs of the PSFCHs. Each PSFCH in the second set of selected PSFCHs is associated with one of the following: the lowest priority or the earliest time slot according to the ascending priority rule; and a third set of selected PSFCHs is selected from the remaining scheduled PSFCHs according to the ascending priority rule, first for PSFCHs containing Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information, and then for PSFCHs containing conflict information.

[0181] In a twenty-second aspect, in combination with one or more of aspects eleven to twenty-one, the at least one processor is operable to cause the UE to: select from the maximum number N of simultaneous PSFCHs according to the PSFCH selection sequence in response to the following condition. max,PSFCH The number N of the multiple PSFCH selections. Tx,PSFCH : The number N of PSFCHs scheduled sch,Tx,PSFCH Greater than the maximum number N of simultaneous PSFCH sch,Tx,PSFCH >N max,PSFCH An initial power value dl-P0-PSFCH based on downlink path loss for power control of PSFCH is configured, the PSFCH selection sequence including at least one processor capable of operating such that the UE: selects from the maximum number N of simultaneous PSFCHs according to one of the following max,PSFCH The multiple PSFCHs to be selected are selected according to the ascending priority rule of the multiple scheduled PSFCHs, up to a maximum of N, the number of PSFCHs to be selected. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or to ensure that the N Tx,PSFCHAt least one addressing COT-initiating UE PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission, wherein the number N of the plurality of selected PSFCHs is... Tx,PSFCH ≥X≥1, and The at least one processor is operable to cause the UE to select the plurality of selected PSFCHs according to one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or to ensure that the PSFCH of the at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE is performed in response to the following condition: the total transmission power P of the plurality of scheduled PSFCHs. sch,Tx,PSFCH Greater than the maximum transmit power P CMAX The number N of the plurality of scheduled PSFCHs sch,Tx,PSFCH The maximum number N of simultaneous PSFCH is less than or equal to the number of PSFCH. max,PSFCH And the dl-P0-PSFCH is configured at the UE.

[0182] In the twenty-third aspect, in combination with one or more of aspects eleven to twenty-two, the at least one processor is operable to cause the UE to: from the maximum number N of simultaneous PSFCH according to one of the following max,PSFCH The multiple PSFCHs to be selected are selected according to the ascending priority rule of the multiple scheduled PSFCHs, up to a maximum of N, the number of PSFCHs to be selected. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or to ensure that the N Tx,PSFCH At least one addressing COT-initiating UE PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission, wherein the number N of the plurality of selected PSFCHs is... Tx,PSFCH ≥X≥1, and And the total transmit power P of the multiple selected PSFCHs Tx,PSFCH Less than or equal to the maximum transmit power P CMAXThe at least one processor is operable to cause the UE to select the plurality of selected PSFCHs according to one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or to ensure that the PSFCH of the at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE is performed in response to the fact that the downlink path loss-based power control dl-PO-PSFCH for the PSFCH is not configured at the UE.

[0183] The twenty-fourth aspect of wireless communication performed by a UE may include: establishing a COT with a wideband operating frequency associated with a plurality of RB sets; transmitting a COT-SI message on an SL-U channel, the COT-SI message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing the transmission of PSFCH; completing a first transmission within a portion of the COT; identifying a second transmission to update the transmission within the COT; identifying one or more shared RB sets from the plurality of RB sets; and transmitting the second transmission using one or more available RBs within the one or more shared RB sets.

[0184] In the twenty-fifth aspect, in conjunction with the twenty-fourth aspect, identifying the one or more shared RB sets further includes: detecting at least one PSFCH from at least one of the one or more adjacent UEs within the one or more shared RB sets.

[0185] In the twenty-sixth aspect, in combination with one or more of the twenty-fourth to twenty-fifth aspects, the COT-SI message further includes: a third indication identifying the required shared bandwidth that the COT needs to be occupied by any of the one or more adjacent UEs, the required shared bandwidth including one of the following: a designated set of RB sets in the plurality of RB sets, or the broadband operating frequency.

[0186] In the twenty-seventh aspect, in conjunction with the twenty-sixth aspect, a sidelink control information (SCI) message is transmitted, the SCI message including a priority indicator identifying the priority associated with the UE transmission of the corresponding PSSCH in the one or more PSSCHs, and transmitting one or more Physical Sidelink Shared Channels (PSSCHs) to at least one non-COT initiating UE among the one or more neighboring UEs.

[0187] In the twentieth aspect, in combination with one or more of the twentieth to the twenty-seventh aspects, in response to the determination that an unscheduled PSSCH within a plurality of Physical Side Link Shared Channel (PSSCH) slots of the COT is associated with the plurality of neighboring UEs, it is decided to avoid including the first indication in the COT-SI; and in response to at least one scheduled PSSCH among the scheduled PSSCHs being associated with at least one neighboring UE among the plurality of neighboring UEs, it is decided to include the first indication in the COT-SI.

[0188] The twenty-ninth aspect of wireless communication performed by the UE may include: receiving a COT-SI message from the COT-initiating UE, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with a plurality of RB sets and a second indication allowing the transmission of PSFCHs; identifying at least one selected PSFCH for transmission from a plurality of selected PSFCHs within an RB in the plurality of RB sets and associated with the COT-initiating UE; and transmitting one or more selected PSFCHs from at least one of the plurality of selected PSFCHs in the plurality of RB sets on an SL-U channel.

[0189] In the thirtieth aspect, in conjunction with the twenty-ninth aspect, one or more RB sets are identified among the plurality of RB sets, wherein at least one of the plurality of selected PSFCHs addresses a PSFCH of a non-COT-initiated UE located in the one or more RB sets and none of the at least one selected PSFCHs among the plurality of selected PSFCHs is located in the one or more RB sets; and in each of the one or more RB sets, the transmission of the PSFCH of the at least one selected PSFCH associated with the COT-initiated UE is repeated.

[0190] In the thirty-first aspect, in conjunction with the thirtieth aspect, identifying at least two addressing COT-initiating UE PSFCHs among the at least one selected PSFCHs associated with the COT-initiating UE; and selecting the addressing COT-initiating UE PSFCH from the at least two addressing COT-initiating UE PSFCHs according to the associated priority of the Physical Side Link Shared Channel (PSSCH) corresponding to each addressing COT-initiating UE PSFCH, wherein the associated priority of the PSSCH corresponding to the addressing COT-initiating UE PSFCH is one of the following: highest priority PSSCH or lowest priority PSSCH.

[0191] In the thirty-second aspect, in combination with one or more of aspects thirty to thirty-one, a plurality of scheduled PSFCHs on the plurality of RB sets are identified, the plurality of scheduled PSFCHs including PSFCHs of one or more addressing COT-initiated UEs corresponding to at least one selected PSFCH associated with the COT-initiated UE and PSFCHs of the addressing COT-initiated UEs in each of the one or more RB sets; and the plurality of selected PSFCHs are selected from the plurality of scheduled PSFCHs, the total number of the plurality of selected PSFCHs being N. Tx,PSFCH The number N of scheduled PSFCHs in each RB set is determined by the PSFCHs of the UEs scheduled by the one or more addressing COTs. sch,Tx,PSFC To choose.

[0192] In the thirty-third aspect, in combination with one or more of the thirty to thirty-second aspects, a plurality of scheduled PSFCHs for transmission in the COT are identified; and in order to ensure that at least one addressing COT-initiating UE's PSFCH is selected from each of the plurality of RB sets occupied by the UE's PSFCH transmission, the plurality of selected PSFCHs are selected.

[0193] In the thirty-fourth aspect, in combination with one or more of the twenty-ninth to thirty-fourth aspects, the COT-SI further includes a third indication identifying the required shared bandwidth that the UE needs to occupy when sharing the COT, the required shared bandwidth including one or more required RB sets corresponding to one of the following: a predefined set of RB sets among the plurality of RB sets, or the broadband operating frequency.

[0194] In the thirty-fifth aspect, in conjunction with the thirty-fourth aspect, the UE receives a sidelink control information (SCI) message from the COT, the SCI message including a priority indicator identifying the priority of a corresponding PSSCH associated with the UE in one or more PSSCHs, the priority being related to the COT-initiated UE transmission of the corresponding PSSCH; identifying the highest priority among one or more PSFCHs to be transmitted by the UE within the COT and one or more Physical Sidelink Shared Channels (PSSCHs) to be transmitted by the UE within the COT; identifying that the COT can be partially shared in response to the one or more PSFCHs being identified as having the highest priority; and occupying the required shared bandwidth for PSFCH transmission in response to the one or more PSSCHs having the highest priority.

[0195] In the thirty-sixth aspect, in combination with one or more of the thirty-fourth to thirty-fifth aspects, the selected PSFCH for transmission is chosen from a plurality of scheduled PSFCHs to include at least one desired PSFCH for transmission in each desired RB set for the desired shared bandwidth and to include at least one PSFCH of at least one addressing COT-initiating UE in at least one shared RB in the plurality of RB sets of the COT.

[0196] In aspect thirty-seven, in combination with one or more of aspects thirty-six, the number N of the plurality of selected PSFCHs is... Tx,PSFCH Choose ≥X≥1, where K is the total transmit power of all X selected PSFCHs among the multiple selected PSFCHs, which is no greater than P. CMAX The maximum value, M i Y is a defined number of PSFCHs with priority value i, and Y is the PSFCH index of a specific PSFCH. Each of the multiple selected PSFCHs is indexed according to an ascending priority rule, and N is the number of selected PSFCHs. Tx,PSFCH It is performed in response to the following condition: the total transmit power P of the plurality of selected PSFCHs. Tx,PSFCH Greater than P CMAX The number N of the plurality of selected PSFCH Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0197] In the thirty-eighth aspect, in combination with the thirty-seventh aspect, it includes: indexing each of the plurality of selected PSFCHs according to one of the following: the time-domain position, frequency-domain position, or a combination thereof corresponding to the physical side link shared channel (PSSCH) of each selected PSFCH; the indexing of each of the plurality of selected PSFCHs is performed in response to two or more selected PSFCHs having the same priority under the ascending priority rule.

[0198] In aspect thirty-nine, in combination with one or more of aspects thirty-seven to thirty-eight, the particular PSFCH is identified as one of the following: a first selected PSFCH among the plurality of selected PSFCHs that ensures the at least one required PSFCH is transmitted within each of the one or more required RB sets, or a first selected PSFCH among the plurality of selected PSFCHs that ensures the at least one required PSFCH is transmitted within each of the required RB sets with required shared bandwidth, and the PSFCH of the at least one addressing COT-initiating UE is transmitted within the at least one shared RB in the plurality of RB sets of the COT.

[0199] In the fortieth aspect, in combination with one or more of aspects thirty-four to thirty-nine, the number N of the plurality of selected PSFCHs is... Tx,PSFCH Choose ≥X≥1, and the maximum number N of PSFCHs at any given time. max,PSFCH ,in K is the total transmit power of all X selected PSFCHs, which is no greater than P. CMAX The maximum value of, and Y is the PSFCH index of the specific PSFCH, and Y < the maximum number N of PSFCHs. max,PSFCH ,otherwise The number N of the multiple selected PSFCHs Tx,PSFCH It is executed in response to the following condition: the number N of the plurality of scheduled PSFCHs. Tx,PSFCH Exceeding the maximum number of simultaneous PSFCH, N Tx,PSFCH >N max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0200] In the forty-first aspect, in conjunction with the fortieth aspect, the plurality of selected PSFCHs are selected according to the ascending priority rule, wherein the plurality of selected PSFCHs are selected as ≥Y′≥1, where Y′ is the PSFCH index of the particular PSFCH, and the selection of the plurality of selected PSFCHs according to the ascending priority rule is performed in response to the dl-P0-PSFCH not being configured at the UE.

[0201] In aspect 42, in combination with one or more of aspects 34 to 41, the number N of the plurality of selected PSFCHs is selected according to the PSFCH selection sequence. Tx,PSFCH , PSFCH, where N Tx,PSFCH ≥X≥1, where The selection of the plurality of PSFCHs according to the PSFCH selection sequence is performed in response to the following condition: the total transmit power P of the plurality of scheduled PSFCHs. sch,PSFCH Greater than the maximum transmit power P CMAX The number N of the multiple scheduled PSFCHs sc,Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0202] In aspect forty-third, in combination with aspect forty-second, the PSFCH selection sequence includes: selecting a first set of selected PSFCHs from the plurality of scheduled PSFCHs on a per RB basis in the one or more desired RB sets, each PSFCH in the first set of selected PSFCHs being associated with one of: the lowest priority or the earliest time slot according to an ascending priority rule; and selecting the next set of selected PSFCHs on the remaining scheduled PSFCHs according to the ascending priority rule, first for PSFCHs containing Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information among the remaining scheduled PSFCHs, and then for PSFCHs containing conflict information among the remaining scheduled PSFCHs.

[0203] In aspect 44, in combination with one or more of aspects 42 to 43, the PSFCH selection sequence includes: selecting a first set of selected PSFCHs associated with one or more COT-initiating UEs from the plurality of scheduled PSFCHs, which are associated with one of the following: the lowest priority or the earliest time slot according to an ascending priority rule; selecting a second set of selected PSFCHs from the remaining scheduled PSFCHs of the plurality of scheduled PSFCHs that do not have a PSFCH associated with the COT-initiating UE from one or more non-COT-initiating UEs from the plurality of required RB sets, each PSFCH in the second set of selected PSFCHs being associated with one of the following: the lowest priority or the earliest time slot according to the ascending priority rule; and selecting a third set of selected PSFCHs from the remaining scheduled PSFCHs that contain Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information, first for PSFCHs containing conflict information, and then for PSFCHs containing conflict information, according to the ascending priority rule.

[0204] In aspect forty-fifth, in combination with one or more of aspects thirty-four to forty-fourth, the maximum number N of simultaneous PSFCHs is selected from the PSFCH selection sequence according to the following condition. max,PSFCH The number N of the multiple PSFCH selections. Tx,PSFCH : The number N of PSFCHs scheduled sch,Tx,PSFCH Greater than the maximum number N of simultaneous PSFCH sch,Tx,PSFCH >N max,PSFCH An initial power value dl-P0-PSFCH based on downlink path loss for power control of PSFCH is configured, wherein the PSFCH selection sequence includes selecting from the maximum number N of simultaneous PSFCHs according to one of the following. max,PSFCH The multiple PSFCHs to be selected are selected according to the ascending priority rule of the multiple scheduled PSFCHs, up to a maximum of N, the number of PSFCHs to be selected. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sc,Tx,PSFCH To determine, or to ensure that the N Tx,PSFCH At least one addressing COT-initiating UE PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission, wherein the number N of the plurality of selected PSFCHs is... Tx,PSFCH ≥X≥1, and The selection of the plurality of PSFCHs is based on one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or, to ensure that the PSFCH of at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE, is performed in response to the following condition: the total transmission power P of the plurality of scheduled PSFCHs. sch,Tx,PSFCH Greater than the maximum transmit power P CMAX The number N of the multiple scheduled PSFCHs sch,Tx,PSFCH The maximum number N of simultaneous PSFCH is less than or equal to the number of PSFCH. nax,PSFCH And the dl-P0-PSFCH is configured at the UE.

[0205] In aspect 46, in combination with one or more of aspects 34 to 45, the maximum number N of simultaneous PSFCH is determined according to one of the following: max,PSFCHThe multiple PSFCHs to be selected are selected according to the ascending priority rule of the multiple scheduled PSFCHs, up to a maximum of N, the number of PSFCHs to be selected. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or to ensure that the N Tx,PSFCH At least one addressing COT-initiating UE PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission, wherein the number N of the plurality of selected PSFCHs is... Tx,PSFCH ≥X≥1, and And the total transmit power P of the multiple selected PSFCHs Tx,PSFCH Less than or equal to the maximum transmit power P CMAX The plurality of selected PSFCHs are selected according to one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or to ensure that the PSFCH of at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE is performed in response to the fact that the downlink path loss-based power control dl-P0-PSFCH for the PSFCH is not configured at the UE.

[0206] The forty-seventh aspect for wireless communication performed by a UE may include: components for establishing a COT with a wideband operating frequency associated with a plurality of RB sets; transmitting a COT-SI message on an SL-U channel, the COT-SI message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing the transmission of PSFCH; components for completing a first transmission within a portion of the COT; components for identifying a second transmission to update the transmission within the COT; components for identifying one or more shared RB sets from the plurality of RB sets; and components for transmitting the second transmission using one or more available RBs within the one or more shared RB sets.

[0207] In the forty-eighth aspect, in combination with the forty-seventh aspect, the component for identifying the one or more shared RB sets further includes a component for detecting at least one PSFCH from at least one of the one or more adjacent UEs within the one or more shared RB sets.

[0208] In aspect 49, in combination with one or more of aspects 47 to 48, the COT-SI message further includes: a third indication identifying the required shared bandwidth that the COT needs to be occupied by any of the one or more adjacent UEs, the required shared bandwidth including one of the following: a designated set of RB sets in the plurality of RB sets, or the broadband operating frequency.

[0209] In the fiftieth aspect, in conjunction with the forty-ninth aspect, the component for transmitting a sidelink control information (SCI) message, the sidelink control information (SCI) message including a priority indicator identifying the priority associated with the UE transmission of the corresponding PSSCH in the one or more PSSCHs; and the component for transmitting one or more physical sidelink shared channels (PSSCHs) to at least one non-COT initiating UE among the one or more adjacent UEs.

[0210] In the fifty-first aspect, in combination with one or more of aspects forty-seven to fifty, there are components for deciding to avoid including the first indication in the COT-SI in response to the determination that an unscheduled PSSCH within a plurality of Physical Side Link Shared Channel (PSSCH) slots of the COT is associated with the plurality of adjacent UEs; and components for deciding to include the first indication in the COT-SI in response to at least one scheduled PSSCH among the plurality of adjacent UEs being associated with at least one adjacent UE among the plurality of adjacent UEs.

[0211] The fifty-second aspect for wireless communication performed by a UE may include: components for receiving a COT-SI message from a COT-initiating UE, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with a plurality of RB sets and a second indication allowing the transmission of PSFCHs; components for identifying at least one selected PSFCH among a plurality of selected PSFCHs for transmission within an RB in the plurality of RB sets and associated with the COT-initiating UE; and components for transmitting one or more selected PSFCHs among the plurality of selected PSFCHs in at least one of the plurality of RB sets on an SL-U channel.

[0212] In aspect 53, in conjunction with aspect 52, there are components for identifying one or more RB sets among the plurality of RB sets, wherein at least one of the plurality of selected PSFCHs addresses a PSFCH of a non-COT-initiated UE located in the one or more RB sets and none of the at least one selected PSFCHs among the plurality of selected PSFCHs is located in the one or more RB sets; and components for repeating the transmission of the PSFCH of the at least one selected PSFCH associated with the COT-initiated UE in each of the one or more RB sets.

[0213] In the fifty-fourth aspect, in conjunction with the fifty-third aspect, there are components for identifying at least two addressable PSFCHs of the at least one selected PSFCH associated with the COT-initiating UE; and components for selecting the addressable COT-initiating UE's PSFCH from the at least two addressable COT-initiating UE's PSFCHs based on the associated priority of the Physical Side Link Shared Channel (PSSCH) corresponding to each addressable COT-initiating UE's PSFCH, wherein the associated priority of the PSSCH corresponding to the addressable COT-initiating UE's PSFCH is one of the following: highest priority PSSCH or lowest priority PSSCH.

[0214] In aspect 55, in combination with one or more of aspects 53 to 54, a component for identifying multiple scheduled PSFCHs on the multiple RB sets, the multiple scheduled PSFCHs including PSFCHs of one or more addressing COT-initiated UEs corresponding to at least one selected PSFCH associated with the COT-initiated UE and PSFCHs of the addressing COT-initiated UEs in each of the one or more RB sets; and a component for selecting the multiple selected PSFCHs from the multiple scheduled PSFCHs, the total number N of the multiple selected PSFCHs being... Tx,PSFCH The number N of scheduled PSFCHs in each RB set is determined by the PSFCHs of the UEs scheduled by the one or more addressing COTs. sch,Tx,PSFCH To choose.

[0215] In aspect 56, in combination with one or more of aspects 53 to 55, there are components for identifying multiple scheduled PSFCHs for transmission in the COT; and components for selecting the multiple selected PSFCHs in each of the multiple RB sets occupied by the PSFCH transmission of the UE in order to ensure that at least one addressing COT-initiating UE's PSFCH is selected from the multiple RB sets.

[0216] In aspect 57, in combination with one or more of aspects 52 to 56, the COT-SI further includes a third indication identifying the required shared bandwidth that the UE needs to occupy when sharing the COT, the required shared bandwidth including one or more required RB sets corresponding to one of the following: a predefined set of RB sets among the plurality of RB sets, or the broadband operating frequency.

[0217] In the fifty-eighth aspect, in conjunction with the fifty-seventh aspect, there are components for receiving a sidelink control information (SCI) message from the COT-initiating UE, the sidelink control information (SCI) message including a priority indicator identifying the priority of a corresponding PSSCH associated with the UE in one or more PSSCHs, the priority being related to the COT-initiating UE transmission of the corresponding PSSCH; components for identifying the highest priority among one or more PSFCHs to be transmitted by the UE within the COT and one or more Physical Sidelink Shared Channels (PSSCHs) to be transmitted by the UE within the COT; components for identifying that the COT can be partially shared in response to the one or more PSFCHs being identified as having the highest priority; and components for occupying the required shared bandwidth for PSFCH transmission in response to the one or more PSSCHs having the highest priority.

[0218] In aspect 59, in combination with one or more of aspects 57 to 58, there is a component for selecting, from a plurality of scheduled PSFCHs, the plurality of selected PSFCHs for transmission to include at least one desired PSFCH for transmission within each desired RB set for desired shared bandwidth and to include at least one PSFCH of an addressing COT-initiating UE within at least one shared RB in the plurality of RB sets of the COT.

[0219] In the sixtieth aspect, in combination with the fifty-ninth aspect, for the purpose of selecting the number N of the plurality of PSFCHs. Tx,PSFCH Select the components that are ≥X≥1, where K is the total transmit power of all X selected PSFCHs among the multiple selected PSFCHs, which is no greater than P.CMAX The maximum value, M i Y is a defined number of PSFCHs with priority value i, and Y is the PSFCH index of a specific PSFCH. Each of the multiple selected PSFCHs is indexed according to an ascending priority rule, and the number N used to select the multiple selected PSFCHs is... Tx,PSFCH It is a component that operates in response to the following condition: the total transmit power P of the plurality of selected PSFCHs. Tx,PSFCH Greater than P CMAX The number N of the plurality of selected PSFCH Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0220] In the sixty-first aspect, in conjunction with the sixtieth aspect, the component for indexing each of the plurality of selected PSFCHs according to one of the following: the time-domain position, frequency-domain position, or a combination thereof of the physical side link shared channel (PSSCH) corresponding to each of the selected PSFCHs; the component for indexing each of the plurality of selected PSFCHs is performed in response to two or more selected PSFCHs having the same priority under the ascending priority rule.

[0221] In aspect sixty-two, in combination with one or more of aspects sixty to sixty-one, the particular PSFCH is identified as one of the following: a first selected PSFCH among the plurality of selected PSFCHs that ensures the at least one required PSFCH is transmitted within each of the one or more required RB sets, or a first selected PSFCH among the plurality of selected PSFCHs that ensures the at least one required PSFCH is transmitted within each of the required RB sets with required shared bandwidth, and the PSFCH of the at least one addressing COT-initiating UE is transmitted within the at least one shared RB in the plurality of RB sets of the COT.

[0222] In aspect sixty-three, in combination with one or more of aspects fifty-seven to sixty-two, the method for increasing the number N of the plurality of selected PSFCHs is as follows: Tx,PSFCH Choose ≥X≥1, and the maximum number N of PSFCHs at any given time. max,PSFCH The components, among which K is the total transmit power of all X selected PSFCHs, which is no greater than P. CMAX The maximum value of, and Y is the PSFCH index of the specific PSFCH, and Y < the maximum number N of PSFCHs. max,PSFCH ,otherwise The number N used to select the plurality of PSFCHs Tx,PSFCH It is a component that executes in response to the following condition: the number N of the plurality of scheduled PSFCHs. Tx,PSFCH Exceeding the maximum number of simultaneous PSFCH, N Tx,PSFCH >N max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0223] In the sixty-fourth aspect, in conjunction with the sixty-third aspect, the component for selecting the plurality of selected PSFCHs according to the ascending priority rule, wherein the plurality of selected PSFCHs are selected as ≥Y′≥1, where Y′ is the PSFCH index of the particular PSFCH, the component for selecting the plurality of selected PSFCHs according to the ascending priority rule is performed in response to the dl-P0-PSFCH not being configured at the UE.

[0224] In aspect sixty-fif, in combination with one or more of aspects fifty-seven to sixty-four, the number N of PSFCHs used to select the plurality of selections according to the PSFCH selection sequence is specified. Tx,PSFCH The component, PSFCH, where N Tx,PSFCH ≥X≥1, where The component for selecting the plurality of PSFCHs according to the PSFCH selection sequence is executed in response to the following condition: the total transmission power P of the plurality of scheduled PSFCHs. sch,PSFCH Greater than the maximum transmit power P CMAX The number N of the multiple scheduled PSFCHs sch,Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0225] In a sixty-sixth aspect, in combination with a sixty-fifth aspect, the PSFCH selection sequence includes: a component for selecting a first set of selected PSFCHs from the plurality of scheduled PSFCHs on a per-RB basis in the one or more desired RB sets, each PSFCH in the first set of selected PSFCHs being associated with one of: the lowest priority according to an ascending priority rule, or the earliest time slot; and a component for selecting the next set of selected PSFCHs on the remaining scheduled PSFCHs, according to the ascending priority rule, first for PSFCHs containing Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information among the remaining scheduled PSFCHs, and then for PSFCHs containing conflict information among the remaining scheduled PSFCHs.

[0226] In aspect sixty-seven, in combination with one or more of aspects sixty-five to sixty-six, the PSFCH selection sequence includes: a component for selecting a first set of PSFCHs associated with one or more COT-initiated UEs from the plurality of scheduled PSFCHs, which is associated with one of: the lowest priority according to an ascending priority rule, or the earliest time slot; and a component for selecting from the remaining scheduled PSFCHs of the plurality of scheduled RB sets that do not have a PSFCH associated with the COT-initiated UE from the one or more non-COT-initiated UE-associated RB sets of the plurality of required RB sets. The component that selects a second set of PSFCHs in the FCH, each PSFCH in the second set of selected PSFCHs being associated with one of the following: the lowest priority or earliest slot according to the ascending priority rule; and the component that selects a third set of PSFCHs from the remaining scheduled PSFCHs according to the ascending priority rule, first for PSFCHs containing Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information among the remaining scheduled PSFCHs, and then for PSFCHs containing conflict information among the remaining scheduled PSFCHs.

[0227] In aspect sixty-eight, in combination with one or more of aspects fifty-seven to sixty-seven, it is used to select from the maximum number N of simultaneous PSFCHs according to the PSFCH selection sequence in response to the following condition. max,PSFCH The number N of the multiple PSFCH selections. Tx,PSFCH Components: Number N of scheduled PSFCHs sch,Tx,PSFCH Greater than the maximum number N of simultaneous PSFCH sch,Tx,PSFCH >N max,PSFCHAn initial power value dl-P0-PSFCH based on downlink path loss for power control of PSFCH is configured, the PSFCH selection sequence including: for selecting from the maximum number N of simultaneous PSFCHs according to one of the following. max,PSTCH The component that selects the plurality of PSFCHs: the ascending priority rule of the plurality of scheduled PSFCHs, up to the number N of the plurality of selected PSFCHs. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or to ensure that the N Tx,PSFCH At least one addressing COT-initiating UE PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission, wherein the number N of the plurality of selected PSFCHs is... Tx,PSFCH ≥X≥1, and The component for selecting the plurality of PSFCHs based on one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or to ensure that the PSFCH of at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE, is executed in response to the following condition: the total transmission power P of the plurality of scheduled PSFCHs. sch,Tx,PSFCH Greater than the maximum transmit power P CMAX The number N of the multiple scheduled PSFCHs sch,Tx,PSFCH The maximum number N of simultaneous PSFCH is less than or equal to the number of PSFCH. max,PSFCH And the dl-P0-PSFCH is configured at the UE.

[0228] In aspect sixty-nine, in combination with one or more of aspects fifty-seven to sixty-eight, it is used to determine from the maximum number N of simultaneous PSFCH according to one of the following max,PSFCH The component that selects the plurality of PSFCHs: the ascending priority rule of the plurality of scheduled PSFCHs, up to the number N of the plurality of selected PSFCHs. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or to ensure that the N Tx,PSFCHAt least one addressing COT-initiating UE PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission, wherein the number N of the plurality of selected PSFCHs is... Tx,PSFCH ≥X≥1, and And the total transmit power P of the multiple selected PSFCHs Tx,PSFCH Less than or equal to the maximum transmit power P CMAX The component is used to select the plurality of selected PSFCHs based on one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or to ensure that the PSFCH of at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE, in response to the fact that the downlink path loss-based power control dl-P0-PSFCH for the PSFCH is not configured at the UE.

[0229] The seventieth aspect includes a non-transitory computer-readable medium storing instructions on a UE. When executed by a processor, the instructions cause the processor to perform operations including: establishing a channel COT with a wideband operating frequency associated with a plurality of RB sets; transmitting a COT-SI message on an SL-U channel, the COT-SI message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing the transmission of PSFCH; completing a first transmission within a portion of the COT; identifying a second transmission to update the transmission within the COT; identifying one or more shared RB sets from the plurality of RB sets; and transmitting the second transmission using one or more available RBs within the one or more shared RB sets.

[0230] In the seventy-first aspect, in conjunction with the seventy-first aspect, identifying the one or more shared RB sets further includes: detecting at least one PSFCH from at least one of the one or more adjacent UEs within the one or more shared RB sets.

[0231] In aspect seventy-two, in conjunction with aspect seventy-one, the COT-SI message further includes a third indication identifying the required shared bandwidth that the COT needs to be occupied by any of the one or more adjacent UEs, the required shared bandwidth including one of the following: a designated set of RB sets in the plurality of RB sets, or the broadband operating frequency.

[0232] In aspect seventy-three, in conjunction with aspect seventy-two, a side link control information (SCI) message is transmitted, the side link control information (SCI) message including a priority indicator identifying the priority associated with the UE transmission of the corresponding PSSCH in the one or more PSSCHs; and transmitting one or more physical side link shared channels (PSSCHs) to at least one non-COT initiating UE among the one or more adjacent UEs.

[0233] In the seventy-fourth aspect, in conjunction with the seventieth aspect, in response to the determination that an unscheduled PSSCH within a plurality of Physical Side Link Shared Channel (PSSCH) slots of the COT is associated with the plurality of neighboring UEs, it is decided to avoid including the first indication in the COT-SI; and in response to at least one scheduled PSSCH among the scheduled PSSCHs being associated with at least one neighboring UE among the plurality of neighboring UEs, it is decided to include the first indication in the COT-SI.

[0234] A seventy-fifth aspect includes a non-transitory computer-readable medium storing instructions on a UE. When executed by a processor, the instructions cause the processor to perform operations including: receiving a COT-SI message from a COT-initiating UE, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with a plurality of RB sets and a second indication allowing the transmission of PSFCHs; identifying at least one selected PSFCH for transmission from a plurality of selected PSFCHs within RBs in the plurality of RB sets and associated with the COT-initiating UE; and transmitting one or more selected PSFCHs from at least one of the plurality of selected PSFCHs in the plurality of RB sets on an SL-U channel.

[0235] In the seventy-sixth aspect, in conjunction with the seventy-fifth aspect, one or more RB sets are identified in which at least one of the plurality of selected PSFCHs addresses a PSFCH of a non-COT-initiated UE located in the one or more RB sets and none of the at least one selected PSFCHs in the plurality of selected PSFCHs are located in the one or more RB sets; and in each of the one or more RB sets, the transmission of the PSFCH of the at least one selected PSFCH associated with the COT-initiated UE is repeated.

[0236] In the seventy-seventh aspect, in conjunction with the seventy-sixth aspect, at least two addressing COT-initiating UE PSFCHs among the at least one selected PSFCHs associated with the COT-initiating UE are identified; and the addressing COT-initiating UE PSFCH is selected from the at least two addressing COT-initiating UE PSFCHs according to the associated priority of the Physical Side Link Shared Channel (PSSCH) corresponding to each of the at least two addressing COT-initiating UE PSFCHs, wherein the associated priority of the PSSCH corresponding to the addressing COT-initiating UE PSFCH is one of the following: highest priority PSSCH or lowest priority PSSCH.

[0237] In aspect seventy-eight, in combination with one or more of aspects seventy-six to seventy-seven, identifying multiple scheduled PSFCHs on the multiple RB sets, the multiple scheduled PSFCHs including PSFCHs of one or more addressing COT-initiated UEs corresponding to at least one selected PSFCH associated with the COT-initiated UE and PSFCHs of the addressing COT-initiated UEs in each of the one or more RB sets; and selecting the multiple selected PSFCHs from the multiple scheduled PSFCHs, the total number N of the multiple selected PSFCHs. Tx,PSF The number N of scheduled PSFCHs in each RB set is determined by the PSFCHs of the UEs scheduled by the one or more addressing COTs. sch,Tx,PSFCH To choose.

[0238] In aspect seventy-nine, in combination with one or more of aspects seventy-six to seventy-eight, a plurality of scheduled PSFCHs for transmission in the COT are identified; and in order to ensure that at least one addressing COT-initiating UE's PSFCH is selected from each of the plurality of RB sets occupied by the UE's PSFCH transmission, the plurality of selected PSFCHs are selected.

[0239] In the 80th aspect, in combination with one or more of aspects 75 to 79, the COT-SI further includes a third indication identifying the required shared bandwidth that the UE needs to occupy when sharing the COT, the required shared bandwidth including one or more required RB sets corresponding to one of the following: a predefined set of RB sets among the plurality of RB sets, or the broadband operating frequency.

[0240] In an eighty-first aspect, in conjunction with the eightieth aspect, the COT-initiating UE receives a Side Link Control Information (SCI) message, the SCI message including a priority indicator identifying the priority of a corresponding PSSCH associated with the UE in one or more PSSCHs, the priority being related to the COT-initiating UE transmission of the corresponding PSSCH; identifying the highest priority among one or more PSFCHs to be transmitted by the UE within the COT and one or more Physical Side Link Shared Channels (PSSCHs) to be transmitted by the UE within the COT; identifying that the COT can be partially shared in response to the one or more PSFCHs being identified as having the highest priority; and occupying the required shared bandwidth for PSFCH transmission in response to the one or more PSSCHs having the highest priority.

[0241] In aspect 82, in combination with one or more of aspects 80 to 81, the selected PSFCH for transmission is selected from a plurality of scheduled PSFCHs to include at least one required PSFCH for transmission in each required RB set for required shared bandwidth and to include at least one PSFCH of at least one addressing COT-initiating UE in at least one shared RB in the plurality of RB sets of the COT.

[0242] In aspect eighty-three, in combination with aspect eighty-two, the number N of the plurality of selected PSFCHs is... Tx,PSFCH Choose ≥X≥1, where K is the total transmit power of all X selected PSFCHs among the multiple selected PSFCHs, which is no greater than P. CMAX The maximum value, M i Y is a defined number of PSFCHs with priority value i, and Y is the PSFCH index of a specific PSFCH. Each of the multiple selected PSFCHs is indexed according to an ascending priority rule, and N is the number of selected PSFCHs. Tx,PSFCH It is performed in response to the following condition: the total transmit power P of the plurality of selected PSFCHs. Tx,PSFCH , greater than P CMAX The number N of the plurality of selected PSFCH Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0243] In aspect 84, in conjunction with aspect 83, each of the plurality of selected PSFCHs is indexed according to one of the following: the time-domain position, frequency-domain position, or a combination thereof corresponding to the physical side link shared channel (PSSCH) of each selected PSFCH; indexing of each of the plurality of selected PSFCHs is performed in response to two or more selected PSFCHs having the same priority under the ascending priority rule.

[0244] In aspect 85, in combination with one or more of aspects 83 to 84, the specific PSFCH is identified as one of the following: a first selected PSFCH among the plurality of selected PSFCHs that ensures the at least one required PSFCH is transmitted within each of the one or more required RB sets, or a first selected PSFCH among the plurality of selected PSFCHs that ensures the at least one required PSFCH is transmitted within each of the required RB sets with required shared bandwidth, and the PSFCH of the at least one addressing COT-initiating UE is transmitted within the at least one shared RB in the plurality of RB sets of the COT.

[0245] In aspect 86, in combination with one or more of aspects 80 to 85, the number N of the plurality of selected PSFCHs is... Tx,PSFCH Choose ≥X≥1, and the maximum number N of PSFCHs at any given time. max,PSFCH ,in K is the total transmit power of all X selected PSFCHs, which is no greater than P. CMAX The maximum value of, and Y is the PSFCH index of the specific PSFCH, and Y < the maximum number N of PSFCHs. max,PSFCH ,otherwise The number N of the multiple selected PSFCHs Tx,PSFCH It is executed in response to the following condition: the number N of the plurality of scheduled PSFCHs. Tx,PSFCH Exceeding the maximum number of simultaneous PSFCH, N Tx,pSFCH >N max,pSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0246] In the 87th aspect, in conjunction with the 86th aspect, the plurality of selected PSFCHs are selected according to the ascending priority rule, wherein the plurality of selected PSFCHs are selected as ≥Y′≥1, where Y′ is the PSFCH index of the particular PSFCH, and the selection of the plurality of selected PSFCHs according to the ascending priority rule is performed in response to the dl-P0-PSFCH not being configured at the UE.

[0247] In aspect 88, in combination with one or more of aspects 80 to 87, the number N of the plurality of PSFCH selections is selected according to the PSFCH selection sequence. Tx,PSFCH , PSFCH, where N Tx,PSFCH ≥X≥1, where The selection of the plurality of PSFCHs according to the PSFCH selection sequence is performed in response to the following condition: the total transmit power P of the plurality of scheduled PSFCHs. sch,PSFCH Greater than the maximum transmit power P CM The number N of the multiple scheduled PSFCHs sc,Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

[0248] In the 89th aspect, in combination with the 88th aspect, the PSFCH selection sequence includes: selecting a first set of selected PSFCHs from the plurality of scheduled PSFCHs on a per RB basis in the one or more desired RB sets, each PSFCH in the first set of selected PSFCHs being associated with one of: the lowest priority or the earliest time slot according to an ascending priority rule; and selecting the next set of selected PSFCHs on the remaining scheduled PSFCHs according to the ascending priority rule, first for PSFCHs containing Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information among the remaining scheduled PSFCHs, and then for PSFCHs containing conflict information among the remaining scheduled PSFCHs.

[0249] In aspect ninety, in combination with one or more of aspects eighty-eighth to eighty-ninth, the PSFCH selection sequence includes: selecting a first set of selected PSFCHs associated with one or more COT-initiating UEs from the plurality of scheduled PSFCHs, which are associated with one of the following: the lowest priority according to an ascending priority rule, or the earliest time slot; selecting a second set of selected PSFCHs from the remaining scheduled PSFCHs in the plurality of scheduled PSFCHs that do not have a PSFCH associated with the COT-initiating UE from the plurality of scheduled PSFCHs in the plurality of required RB sets, each PSFCH in the second set of selected PSFCHs being associated with one of the following: the lowest priority according to the ascending priority rule, or the earliest time slot; and selecting a third set of selected PSFCHs from the remaining scheduled PSFCHs, first for PSFCHs containing Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information, and then for PSFCHs containing conflict information, according to the ascending priority rule.

[0250] In aspect ninety-one, in combination with one or more of aspects eighty to ninety, the maximum number N of simultaneous PSFCHs is selected from the PSFCH selection sequence according to the following condition. max,PSFCH The number N of the multiple PSFCH selections. Tx,PSFCH : The number N of PSFCHs scheduled sch,Tx,PSFCH Greater than the maximum number N of simultaneous PSFCH sch,Tx,PSFCH >N max,PSFCH An initial power value dl-P0-PSFCH based on downlink path loss for power control of PSFCH is configured, wherein the PSFCH selection sequence includes selecting from the maximum number N of simultaneous PSFCHs according to one of the following. max,PSFCH The multiple PSFCHs to be selected are selected according to the ascending priority rule of the multiple scheduled PSFCHs, up to a maximum of N, the number of PSFCHs to be selected. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or to ensure that the N Tx,PSFCH At least one addressing COT-initiating UE PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission, wherein the number N of the plurality of selected PSFCHs is...Tx,PSFCH ≥X≥1, and The selection of the plurality of PSFCHs is based on one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or, to ensure that the PSFCH of at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE, is performed in response to the following condition: the total transmission power P of the plurality of scheduled PSFCHs. sch,Tx,PSFCH Greater than the maximum transmit power P CMAX The number N of the multiple scheduled PSFCHs sch,Tx,PSFCH The maximum number N of simultaneous PSFCH is less than or equal to the number of PSFCH. max,PSFCH And the dl-P0-PSFCH is configured at the UE.

[0251] In aspect ninety-two, in combination with one or more of aspects eighty to ninety-one, the maximum number N of simultaneous PSFCH is determined according to one of the following. max,PSFCH The multiple PSFCHs to be selected are selected according to the ascending priority rule of the multiple scheduled PSFCHs, up to a maximum of N, the number of PSFCHs to be selected. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or to ensure that the N Tx,PSfCH At least one addressing COT-initiating UE PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission, wherein the number N of the plurality of selected PSFCHs is... Tx,PSFCH ≥X≥1, and And the total transmit power P of the multiple selected PSFCHs Tx,PSFCH Less than or equal to the maximum transmit power P CMAX The plurality of selected PSFCHs are selected according to one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or to ensure that the PSFCH of at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE is performed in response to the fact that the downlink path loss-based power control dl-P0-PSFCH for the PSFCH is not configured at the UE.

[0252] Those skilled in the art will understand that information and signals can be represented using any of a variety of different techniques and skills. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or optical particles, or any combination thereof.

[0253] This article is about Figures 1 to 7 The components, functional blocks, and modules described include processors, electronic devices, hardware devices, electronic components, logic circuits, memory, software code, firmware code, and so on, or any combination thereof. Software should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, and / or functions, regardless of whether it is referred to as software, firmware, middleware, microcode, hardware description languages, or other terms. Furthermore, the features discussed herein can be implemented via dedicated processor circuitry, via executable instructions, or a combination thereof.

[0254] Those skilled in the art will further understand that the various exemplary logic blocks, modules, circuits, and algorithm steps described in conjunction with the disclosure herein can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, various exemplary components, blocks, modules, circuits, and steps have been described above in general terms of their functionality. Whether this functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole. Those skilled in the art may implement the described functionality in different ways for each specific application, but such specific implementation decisions should not be construed as departing from the scope of this disclosure. Those skilled in the art will also readily recognize that the order or combination of components, methods, or interactions described herein are merely examples, and that components, methods, or interactions of various aspects of this disclosure may be combined or performed in ways other than those illustrated and described herein.

[0255] The various exemplary logic components, blocks, modules, circuits, and algorithmic processes described in conjunction with the specific implementations disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. The interchangeability of hardware and software has been broadly described in terms of functionality and illustrated in the aforementioned exemplary components, blocks, modules, circuits, and processes. Whether such functionality is implemented in hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0256] Hardware and data processing means for implementing the various exemplary logic units, 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 units, 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. In some embodiments, the processor may 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 embodiments, specific processes and methods may be performed by circuitry specific to a given function.

[0257] 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. Specific implementations of the subject matter described in this specification may also be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a computer storage medium for execution by a data processing apparatus or for controlling the operation of a data processing apparatus.

[0258] 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, including any medium that can be implemented to transfer a computer program from one location 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 random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), CD-ROM or other optical disc storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium capable of storing desired program code in the form of instructions or data structures and accessible to a computer. Additionally, any connection may be appropriately 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, wherein disks typically magnetically reproduce data, while optical discs optically reproduce data using lasers. Combinations of the above 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.

[0259] Various modifications to the specific embodiments described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other specific embodiments without departing from the spirit or scope of this disclosure. Therefore, the claims are not intended to be limited to the specific embodiments shown herein, but are to be accorded the widest scope consistent with this disclosure, the principles disclosed herein, and the novel features thereof.

[0260] 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.

[0261] Certain features described in this specification in the context of a single embodiment may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although features may be described above as functioning in certain combinations and even originally claimed in this way, in some cases one or more features of the claimed combination may be removed from the claimed combination, and the claimed combination may involve sub-combinations or variations thereof.

[0262] Similarly, although operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring such operations to be performed in the indicated specific order or sequential order, or to perform all illustrated operations to achieve the desired result. Furthermore, the drawings may schematically depict one or more example processes in the form of flowcharts. However, other operations not depicted may be combined with the schematically illustrated example processes. For example, one or more additional operations may be performed before, after, simultaneously with, or between any illustrated operation. In some contexts, multitasking and parallel processing are advantageous. Moreover, the separation of various system components in the embodiments described above should not be construed as requiring such separation in all embodiments, 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. Additionally, several other embodiments 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.

[0263] As used herein (including the claims), the term “or” in a list of two or more items means that any one of the listed items may be used alone, or any combination of two or more listed items may be used. For example, if a composition is described as containing component A, B, or C, the composition may contain A alone; B alone; C alone; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B, and C. Furthermore, as used herein (including the claims), “or” in a list of items beginning with “at least one of” indicates a separate list, such that a list such as “at least one of A, B, or C” refers to A or B or C or AB or AC or BC or ABC (i.e., A and B and C) or any combination of any of these items. The term “substantially” is defined as being substantially, but not necessarily entirely, what is specified (and includes what is specified; for example, substantially 90 degrees includes 90 degrees, and substantially parallel includes parallel), as understood by one of ordinary skill in the art. In any disclosed specific implementation, the term “substantially” may be used in place of “[percentage]” for the specified content, where the percentage includes 0.1%, 1%, 5%, or 10%.

[0264] The prior description of this disclosure is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: At least one memory; and At least one processor, coupled to at least one memory, and operable to enable the UE to: Establish channel occupancy time (COT) with wideband operating frequencies associated with multiple resource block (RB) sets; Transmit a COT Structure Information (COT-SI) message on an unlicensed sidelink (SL-U) channel. The COT Structure Information (COT-SI) message includes a first indication to enable COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication to allow transmission of the Physical Sidelink Feedback Channel (PSFCH). The first transmission is completed within a portion of the COT; Identify the second transmission to update the transmission within the COT; Identify one or more shared RB sets from the plurality of RB sets; as well as The second transmission is sent using one or more available RBs within the one or more shared RB sets.

2. The apparatus of claim 1, wherein the at least one processor operable to cause the UE to identify the one or more shared RB sets is further operable to cause the UE to: detect at least one PSFCH from at least one of the one or more adjacent UEs within the one or more shared RB sets.

3. The apparatus of claim 1, wherein the COT-SI message further comprises: A third indication identifying the required shared bandwidth of the COT to be occupied by any of the one or more adjacent UEs, the required shared bandwidth including one of the following: a specified set of RB sets in the plurality of RB sets, or the broadband operating frequency.

4. The apparatus of claim 3, further comprising the at least one processor, the at least one processor being operable to cause the UE to: Send a Side Link Control Information (SCI) message, the SCI message including a priority indicator that identifies the priority associated with the UE transmission of the corresponding PSSCH in the one or more PSSCHs; and Send one or more Physical Side Link Shared Channels (PSSCHs) to at least one non-COT initiating UE among the one or more adjacent UEs.

5. The apparatus of claim 1, further comprising the at least one processor, the at least one processor being operable to cause the UE to: In response to the determination that unscheduled PSSCHs within multiple Physical Side Link Shared Channel (PSSCH) slots of the COT are associated with the multiple neighboring UEs, it is decided to avoid including the first indication in the COT-SI; and In response to the fact that at least one of the scheduled PSSCHs is associated with at least one of the plurality of neighboring UEs, it is decided to include the first indication in the COT-SI.

6. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: At least one memory; and At least one processor, coupled to at least one memory, and operable to enable the UE to: The UE initiates a Channel Occupancy Time-Structure Information (COT-SI) message from the COT, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with multiple resource block (RB) sets and a second indication allowing the transmission of the Physical Side Link Feedback Channel (PSFCH); The PSFCH identified from multiple selected PSFCHs is within an RB in the multiple RB sets and is associated with the COT-initiating UE; as well as Transmit one or more selected PSFCHs from at least one of the multiple selected PSFCHs in the multiple RB sets on the unlicensed sidelink (SL-U) channel.

7. The apparatus of claim 6, further comprising the at least one processor, the at least one processor being operable to cause the UE to: Identify one or more RB sets among the plurality of RB sets, wherein at least one PSFCH of the plurality of selected PSFCHs addresses a non-COT-initiated UE and is located in the one or more RB sets, and none of the at least one selected PSFCHs among the plurality of selected PSFCHs is located in the one or more RB sets; and In each of the one or more RB sets, the transmission of the PSFCH of the addressing COT-initiating UE in at least one selected PSFCH associated with the COT-initiating UE is repeated.

8. The apparatus of claim 7, further comprising the at least one processor, the at least one processor being operable to cause the UE to: Identifying at least two of the at least selected PSFCHs associated with the COT-initiating UE, and the PSFCHs addressing the COT-initiating UE; and The PSFCH of the addressing COT-initiated UE is selected from the at least two PSFCHs of the addressing COT-initiated UE based on the associated priority of the Physical Side Link Shared Channel (PSSCH) of each PSFCH of the addressing COT-initiated UE, wherein the associated priority of the PSSCH corresponding to the PSFCH of the addressing COT-initiated UE is one of the following: the highest priority PSSCH or the lowest priority PSSCH.

9. The apparatus of claim 7, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The PSFCHs of multiple schedules on the plurality of RB sets are identified, the PSFCHs of the plurality of schedules including the PSFCHs of one or more addressing COT-initiated UEs corresponding to the at least one selected PSFCH associated with the COT-initiated UE, and the PSFCHs of the addressing COT-initiated UEs in each of the one or more RB sets; and The multiple selected PSFCHs are chosen from the multiple scheduled PSFCHs, and the total number of the multiple selected PSFCHs is N. Tx,PSFCH The number N of scheduled PSFCHs in each RB set is determined by the PSFCHs of the UEs scheduled by the one or more addressing COTs. sc,Tx,PSFCH To choose.

10. The apparatus of claim 7, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The PSFCH identifies the multiple schedules used for transmission in the COT; and To ensure that at least one addressing COT-initiating UE's PSFCH is selected from each of the plurality of RB sets occupied by the UE's PSFCH transmission, the plurality of selected PSFCHs are chosen.

11. The apparatus of claim 6, wherein the COT-SI further includes a third indication identifying the required shared bandwidth that the COT needs to be occupied by the UE when sharing the COT, the required shared bandwidth including one or more required RB sets corresponding to one of the following: a predefined set of RB sets among the plurality of RB sets, or the broadband operating frequency.

12. The apparatus of claim 11, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The COT-initiated UE receives a Side Link Control Information (SCI) message, which includes a priority indicator that identifies the priority of a corresponding PSSCH associated with the UE in one or more PSSCHs, the priority being related to the COT-initiated UE transmission of the corresponding PSSCH. Identify the highest priority among one or more PSFCHs to be transmitted by the UE within the COT and one or more Physical Side Link Shared Channels (PSSCHs) to be transmitted by the UE within the COT; In response to the one or more PSFCHs being identified as having the highest priority, the COT is identified as being able to be partially shared; as well as In response to the one or more PSSCHs having the highest priority, the required shared bandwidth for PSFCH transmission is occupied.

13. The apparatus of claim 11, further comprising the at least one processor, the at least one processor being operable to cause the UE to: Select the multiple selected PSFCHs for transmission from multiple scheduled PSFCHs to include at least one required PSFCH for transmission in each required RB set for the required shared bandwidth and to include at least one PSFCH of the addressing COT-initiated UE in at least one shared RB in the multiple RB sets of the COT.

14. The apparatus of claim 13, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The number N of the multiple selected PSFCH Tx,PSFCH Choose ≥X≥1, where K is the total transmit power of all X selected PSFCHs among the multiple selected PSFCHs, which is no greater than P. CMAX The maximum value, M i Y is a defined number of PSFCHs with priority value i, and Y is the PSFCH index of a specific PSFCH. Each of the multiple selected PSFCHs is indexed according to an ascending priority rule. The at least one processor is operable to cause the UE to select the number N of the multiple selected PSFCHs. Tx,PSFCH It is performed in response to the following condition: the total transmit power P of the plurality of selected PSFCHs. Tx,PSFCH Greater than P CMAX The number N of the multiple selected PSFCH Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

15. The apparatus of claim 14, further comprising the at least one processor, the at least one processor being operable to cause the UE to: Indexing each of the plurality of selected PSFCHs is performed based on one of the following: the time-domain location, frequency-domain location, or a combination thereof of the Physical Side Link Shared Channel (PSSCH) corresponding to each selected PSFCH, wherein the at least one processor is operable such that the UE indexing each of the plurality of selected PSFCHs is performed in response to two or more selected PSFCHs having the same priority under the ascending priority rule.

16. The apparatus of claim 14, wherein the specific PSFCH is identified as one of the following: The first selected PSFCH among the multiple selected PSFCHs ensures that at least one required PSFCH is sent within each of the one or more required RB sets, or The first selected PSFCH among the plurality of selected PSFCHs ensures that at least one required PSFCH is transmitted within each required RB set of required shared bandwidth and that the PSFCH of at least one addressing COT-initiated UE is transmitted within at least one shared RB in the plurality of RB sets of the COT.

17. The apparatus of claim 11, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The number N of the multiple selected PSFCH Tx,PSFCH Choose ≥X≥1, and the maximum number N of PSFCHs at any given time. max,PSFCH ,in K is the total transmit power of all X selected PSFCHs, which is no greater than P. CMAX The maximum value of, and Y is the PSFCH index of the specific PSFCH, and Y < the maximum number N of PSFCHs. max,PSFCH ,otherwise The at least one processor is operable to enable the UE to select the number N of the plurality of selected PSFCHs. Tx,PSFCH It is executed in response to the following condition: the number N of the plurality of scheduled PSFCHs. Tx,PSFCH Exceeding the maximum number of simultaneous PSFCH, N Tx,PSFCH >N max,PSfCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

18. The apparatus of claim 17, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The plurality of selected PSFCHs are chosen according to the ascending priority rule, and the plurality of selected PSFCHs are chosen as ≥Y. ′ ≥1, Y ′ The PSFCH index of the specific PSFCH, and the ability of the at least one processor to operate so that the UE selects the plurality of selected PSFCHs according to the ascending priority rule, is performed in response to the fact that the dl-P0-PSFCH is not configured at the UE.

19. The apparatus of claim 11, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The number N of the multiple selected PSFCHs is determined according to the PSFCH selection sequence. Tx,PSFCH , PSFCH, where N Tx,PSFCH ≥X≥1, where The at least one processor is operable to enable the UE to select one of the plurality of selected PSFCHs according to the PSFCH selection sequence, which is performed in response to the following condition: the total transmit power P of the plurality of scheduled PSFCHs. sch,PSFCH Greater than the maximum transmit power P CMAX The number N of the multiple scheduled PSFCHs sch,Tx,PSFCH The maximum number N of simultaneous PSFCHs is less than or equal to N. max,PSFCH An initial power value dl-P0-PSFCH for power control based on downlink path loss for PSFCH is configured at the UE.

20. The apparatus of claim 19, wherein the PSFCH selection sequence includes the at least one processor, the at least one processor being operable to cause the UE to: A first set of selected PSFCHs is selected from the plurality of scheduled PSFCHs based on each RB in the one or more required RB sets, each PSFCH in the first set of selected PSFCHs being associated with one of: the lowest priority according to an ascending priority rule, or the earliest time slot; and According to the ascending priority rule, firstly, for the PSFCHs of the remaining schedules among the multiple scheduled PSFCHs that contain mixed automatic repeat request-acknowledge (HARQ-ACK) information, then for the PSFCHs of the remaining schedules that contain conflict information, select the next set of PSFCHs on the remaining schedules.

21. The apparatus of claim 19, wherein the PSFCH selection sequence includes the at least one processor, the at least one processor being operable to cause the UE to: From one or more COTs of the plurality of scheduled PSFCHs, a first set of PSFCHs associated with the UE is selected, which is associated with one of the following: the lowest priority according to the ascending priority rule, or the earliest time slot; A second set of selected PSFCHs is selected from the remaining scheduled PSFCHs in the PSFCHs of the multiple scheduled PSFCHs of the one or more required RB sets associated with one or more non-COT-initiating UEs, and each PSFCH in the second set of selected PSFCHs is associated with one of the following: the lowest priority according to the ascending priority rule, or the earliest time slot. as well as According to the ascending priority rule, firstly, for the PSFCHs of the remaining schedules among the multiple scheduled PSFCHs that contain mixed automatic repeat request-acknowledge (HARQ-ACK) information, then for the PSFCHs of the remaining schedules that contain conflict information, a third set of PSFCHs is selected from the PSFCHs of the remaining schedules.

22. The apparatus of claim 11, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The maximum number N of simultaneous PSFCH sequences are selected according to the following conditions: max,PSFCH The number N of the multiple PSFCH selections Tx,PSFCH : The number N of PSFCHs scheduled sc,Tx,PSFCH Greater than the maximum number N of simultaneous PSFCH sch,Tx,PSFCH >N max,PSFCH An initial power value dl-P0-PSFCH based on downlink path loss for power control of the PSFCH is configured, the PSFCH selection sequence including at least one processor operable to enable the UE to: The maximum number N of simultaneous PSFCH is determined according to one of the following: max,PSFCH Select the PSFCH from the multiple options: The ascending priority rule for the multiple scheduled PSFCHs is up to the number N of the multiple selected PSFCHs. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or To ensure that the N Tx,PSFCH At least one addressing COT-initiating UE's PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission. The number N of the plurality of selected PSFCHs Tx,PSFCH ≥X≥1, and The at least one processor is operable to cause the UE to select the plurality of selected PSFCHs according to one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or to ensure that the PSFCH of the at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE is performed in response to the following condition: the total transmission power P of the plurality of scheduled PSFCHs. sc,Tx,PSFCH Greater than the maximum transmit power P CMAX The number N of the multiple scheduled PSFCHs sch,Tx,PSFCH The maximum number N of simultaneous PSFCH is less than or equal to the number of PSFCH. max,PSFCH And the dl-P0-PSFCH is configured at the UE.

23. The apparatus of claim 11, further comprising the at least one processor, the at least one processor being operable to cause the UE to: The maximum number N of simultaneous PSFCH is determined according to one of the following: max,PSFCH Select the PSFCH from the multiple options: The ascending priority rule for the multiple scheduled PSFCHs is up to the number N of the multiple selected PSFCHs. Tx,PSFCH The quantity is N based on the number of scheduled PSFCHs N in each of the plurality of RB sets occupied by PSFCHs scheduled by one or more addressing COT-initiated UEs. sch,Tx,PSFCH To determine, or To ensure that the N Tx,PSFCH At least one addressing COT-initiating UE's PSFCH is transmitted in each of the plurality of RB sets occupied by the UE's PSFCH transmission. The number N of the plurality of selected PSFCHs Tx,PSFCH ≥X≥1, and And the total transmit power P of the multiple selected PSFCHs Tx,PSFCH Less than or equal to the maximum transmit power P CMAX The at least one processor is operable to cause the UE to select the plurality of selected PSFCHs according to one of the following: the ascending priority rule of the plurality of scheduled PSFCHs, or to ensure that the PSFCH of the at least one addressing COT-initiating UE is transmitted in each RB set occupied by the PSFCH transmission of the UE is performed in response to the fact that the downlink path loss-based power control dl-PO-PSFCH for the PSFCH is not configured at the UE.

24. A method for wireless communication performed by a user equipment (UE), the method comprising: Establish channel occupancy time (COT) with wideband operating frequencies associated with multiple resource block (RB) sets; Transmit a COT Structure Information (COT-SI) message on an unlicensed sidelink (SL-U) channel. The COT Structure Information (COT-SI) message includes a first indication to enable COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication to allow transmission of the Physical Sidelink Feedback Channel (PSFCH). The first transmission is completed within a portion of the COT; Identify the second transmission to update the transmission within the COT; Identify one or more shared RB sets from the plurality of RB sets; as well as The second transmission is sent using one or more available RBs within the one or more shared RB sets.

25. The method of claim 24, wherein identifying the one or more shared RB sets from the plurality of RB sets comprises: Detect at least one PSFCH from at least one of the one or more neighboring UEs within the one or more shared RB sets.

26. The method of claim 24, wherein the COT-SI message further comprises: A third indication identifying the required shared bandwidth of the COT to be occupied by any of the one or more adjacent UEs, the required shared bandwidth including one of the following: a specified set of RB sets in the plurality of RB sets, or the broadband operating frequency.

27. A method for wireless communication performed by a user equipment (UE), the method comprising: The UE initiates a Channel Occupancy Time-Structure Information (COT-SI) message from the COT, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with multiple resource block (RB) sets and a second indication allowing the transmission of the Physical Side Link Feedback Channel (PSFCH); The PSFCH identified from multiple selected PSFCHs is within an RB in the multiple RB sets and is associated with the COT-initiating UE; as well as Transmit one or more selected PSFCHs from at least one of the multiple selected PSFCHs in the multiple RB sets on the SL-U channel.

28. The method of claim 27, further comprising: Identify one or more RB sets among the plurality of RB sets, wherein at least one PSFCH of the plurality of selected PSFCHs addresses a non-COT-initiated UE and is located in the one or more RB sets, and none of the at least one selected PSFCHs among the plurality of selected PSFCHs is located in the one or more RB sets; as well as In each of the one or more RB sets, the transmission of the PSFCH of the addressing COT-initiating UE in at least one selected PSFCH associated with the COT-initiating UE is repeated.

29. The method of claim 28, further comprising one of the following: The PSFCH of multiple schedules on the plurality of RB sets is identified, the PSFCH of the plurality of schedules including one or more PSFCHs of the schedule of the addressing COT-initiated UE corresponding to at least one selected PSFCH associated with the COT-initiated UE and the PSFCH of the addressing COT-initiated UE in each of the one or more RB sets; and the plurality of selected PSFCHs are selected from the plurality of schedules, the total number of the plurality of selected PSFCHs being N. Tx,PSFCH The number N of scheduled PSFCHs in each RB set is determined by the PSFCHs of the UEs scheduled by the one or more addressing COTs. sch,Yx,PSFCH Determined; or Identify the multiple scheduled PSFCHs for transmission in the COT; and in order to ensure that at least one addressing COT-initiating UE's PSFCH is selected from each of the multiple RB sets occupied by the UE's PSFCH transmission, the multiple selected PSFCHs are selected.

30. The method of claim 27, wherein the COT-SI further includes a third indication identifying the required shared bandwidth that the COT needs to be occupied by the UE when sharing the COT, the required shared bandwidth including one or more required RB sets corresponding to one of the following: a predefined set of RB sets among the plurality of RB sets, or the broadband operating frequency.

31. An apparatus configured for wireless communication by a user equipment (UE), the apparatus comprising: A component used to establish the Channel Occupancy Time (COT) with a wideband operating frequency associated with a set of multiple Resource Blocks (RBs); A component for transmitting a COT Structure Information (COT-SI) message on an unlicensed sidelink (SL-U) channel, the COT Structure Information (COT-SI) message including a first indication enabling COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication allowing transmission of the Physical Sidelink Feedback Channel (PSFCH); Components used to complete the first transmission within a portion of the COT; Components used to identify the second transmission in order to update the transmission within the COT; Components used to identify one or more shared RB sets from the plurality of RB sets; and The component used to transmit the second transmission using one or more available RBs within the one or more shared RB sets.

32. The apparatus of claim 31, wherein the COT-SI message further comprises: A third indication identifying the required shared bandwidth of the COT to be occupied by any of the one or more adjacent UEs, the required shared bandwidth including one of the following: a specified set of RB sets in the plurality of RB sets, or the broadband operating frequency.

33. An apparatus configured for wireless communication by a user equipment (UE), the apparatus comprising: A component for initiating a UE receive Channel Occupancy Time-Structure Information (COT-SI) message from a COT, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with multiple resource block (RB) sets and a second indication allowing the transmission of the Physical Side Link Feedback Channel (PSFCH); A component used to identify at least one selected PSFCH for transmission among multiple selected PSFCHs within an RB in the multiple RB sets and associated with the COT-initiating UE; and A component for transmitting one or more selected PSFCHs from at least one of the multiple selected PSFCHs in the multiple RB sets on the SL-U channel.

34. The apparatus of claim 33, further comprising: A component for identifying one or more RB sets among the plurality of RB sets, wherein at least one PSFCH of the plurality of selected PSFCHs addresses a non-COT-initiating UE and is located in the one or more RB sets, and none of the at least one selected PSFCH among the plurality of selected PSFCHs is located in the one or more RB sets; and A component for repeating the transmission of the addressing COT-initiated UE's PSFCH in at least one selected PSFCH associated with the COT-initiated UE in each of the one or more RB sets.

35. The apparatus of claim 33, wherein the COT-SI further includes a third indication identifying the required shared bandwidth that the COT needs to be occupied by the UE when sharing the COT, the required shared bandwidth including one or more required RB sets corresponding to one of the following: a predefined set of RB sets among the plurality of RB sets, or the broadband operating frequency.

36. A non-transitory computer-readable medium storing instructions on a user equipment (UE), the instructions causing the processor to perform operations when executed by a processor, the operations including: Establish channel occupancy time (COT) with wideband operating frequencies associated with multiple resource block (RB) sets; Transmit a COT Structure Information (COT-SI) message on an unlicensed sidelink (SL-U) channel. The COT Structure Information (COT-SI) message includes a first indication to enable COT sharing with one or more adjacent UEs capable of SL-U communication and a second indication to allow transmission of the Physical Sidelink Feedback Channel (PSFCH). The first transmission is completed within a portion of the COT; Identify the second transmission to update the transmission within the COT; Identify one or more shared RB sets from the plurality of RB sets; as well as The second transmission is sent using one or more available RBs within the one or more shared RB sets.

37. The non-transitory computer-readable medium of claim 36, wherein the COT-SI message further comprises: A third indication identifying the required shared bandwidth of the COT to be occupied by any of the one or more adjacent UEs, the required shared bandwidth including one of the following: a specified set of RB sets in the plurality of RB sets, or the broadband operating frequency.

38. A non-transitory computer-readable medium storing instructions on a user equipment (UE), the instructions causing the processor to perform operations when executed by a processor, the operations including: The UE initiates a Channel Occupancy Time-Structure Information (COT-SI) message from the COT, the COT-SI including a first indication enabling COT sharing of COTs with wideband operating frequencies associated with multiple resource block (RB) sets and a second indication allowing the transmission of the Physical Side Link Feedback Channel (PSFCH); The PSFCH identified from multiple selected PSFCHs is within an RB in the multiple RB sets and is associated with the COT-initiating UE; as well as Transmit one or more selected PSFCHs from at least one of the multiple selected PSFCHs in the multiple RB sets on the SL-U channel.

39. The non-transitory computer-readable medium according to claim 38, further comprising: Identify one or more RB sets among the plurality of RB sets, wherein at least one PSFCH of the plurality of selected PSFCHs addresses a non-COT-initiated UE and is located in the one or more RB sets, and none of the at least one selected PSFCHs among the plurality of selected PSFCHs is located in the one or more RB sets; as well as In each of the one or more RB sets, the transmission of the PSFCH of the addressing COT-initiating UE in at least one selected PSFCH associated with the COT-initiating UE is repeated.

40. The non-transitory computer-readable medium of claim 38, wherein the COT-SI further includes a third indication identifying the required shared bandwidth that the COT needs to be occupied by the UE when sharing the COT, the required shared bandwidth including one or more required RB sets corresponding to one of the following: a predefined set of RB sets among the plurality of RB sets, or the broadband operating frequency.

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