System and method for performing sidelink channel occupation time cot sharing on unlicensed carrier

Abstract

Systems and methods for performing sidelink channel occupancy time (COT) sharing on an unlicensed carrier are presented. The first wireless communication device may transmit a first message including channel occupancy time (COT) assistance information to the second wireless communication device; the second wireless communication device can initiate sharing the COT with the first wireless communication device.

Description

Technical Field

[0001] Embodiments of the present application relate to wireless communication, including but not limited to systems and methods for performing sidelink channel occupancy time (COT) sharing on unlicensed carriers / shared spectrum. Background Art

[0002] The standardization organization, the 3rd Generation Partnership Project (3GPP), is currently specifying the new radio interface of 5G new radio (5G NR) and the next-generation packet core network (NG-CN or NGC). 5G NR will have three main components: a 5G access network (5G-AN), a 5G core network (5GC), and a user equipment (UE). To facilitate the implementation of different data services and requirements, the elements of the 5GC (also known as network functions) have been simplified, where some elements are software-based and some are hardware-based, enabling these elements to be adjusted as needed. Summary of the Invention

[0003] Embodiments of the present application aim to solve problems related to one or more problems existing in the prior art and provide additional features that will become apparent when referring to the following detailed description in conjunction with the accompanying drawings. According to various embodiments, embodiments of the present application disclose example systems, methods, devices, and computer program products. However, it should be understood that these embodiments are presented by way of example and not limitation, and various modifications to the disclosed embodiments will be apparent to those of ordinary skill in the art who have read the embodiments of the present application, while remaining within the scope of the embodiments of the present application.

[0004] At least one aspect relates to the following systems, methods, apparatuses, or computer-readable media. A first wireless communication device (e.g., a responding UE) sends a first message including Channel Occupancy Time (COT) assistance information to a second wireless communication device (e.g., a initiating UE). The second wireless communication device is capable of initiating sharing of the COT with the first wireless communication device. The COT assistance information includes one or more sets of parameters for each Channel Access Priority Class (CAPC) value, and each set of parameters is associated with one or more logical channels. Each set of parameters includes at least one of the following: traffic periodicity, duration, Radio Bearer Number (RBNum), Subband Number (SubbandNum), Minimum Timing Offset (MintimingOffset), Maximum Timing Offset (MaxtimingOffset), or buffer size information. In a case where one CAPC value is associated with multiple logical channels, the COT assistance information includes multiple sets of parameters for the CAPC value. In a case where one CAPC value is associated with multiple logical channels, the buffer size information or data estimated arrival amount corresponds to the sum of all associated logical channels.

[0005] In some embodiments, the COT assistance information includes parameters of one or more logical channels associated with a corresponding dedicated destination identifier (ID). The COT assistance information includes a buffer size field and a CAPC value field. The buffer size field is used to indicate the total amount of data available on all logical channels associated with the CAPC value, and the CAPC value field is used to indicate the CAPC value of one or more logical channels having a reported sidelink buffer status.

[0006] In some embodiments, the first wireless communication device determines to send the COT assistance information when at least one of the following is satisfied: the content of the COT assistance information has changed; the sidelink data of a logical channel has become available, and the logical channel where the sidelink data is located has a higher priority than any other logical channel containing available sidelink data; the sidelink data of a logical channel associated with a higher priority CAPC value has become available; the sidelink data of a logical channel associated with a lower priority CAPC value has become available; a Listen-Before-Talk (LBT) failure has been detected; a timer has expired; the first wireless communication device has received a second message from the second wireless communication device indicating that the second wireless communication device is capable of providing the COT; X LBT failures have been detected.

[0007] In some embodiments, before sending COT assistance information, the first wireless communication device receives a second message from the second wireless communication device, where the second message is used to indicate the sharing of the COT. The second message is further used to indicate one or more destination IDs. The COT assistance information includes multiple sets of parameters, and the values of the multiple sets of parameters are sequentially indexed in the same order as presented in the second message. The second wireless communication device selects the first wireless communication device to share the COT when at least one of the following is satisfied: the CAPC value indicated in the COT assistance information is less than or equal to the CAPC value associated with the COT resource and the lowest CAPC value; the CAPC value indicated in the COT assistance information is less than or equal to the CAPC value associated with the COT resource and the highest CAPC value; the estimated arrival or cached data size in the COT assistance information is the largest, where the CAPC value of the data is less than or equal to the CAPC value associated with the COT resource.

[0008] In some embodiments, the first wireless communication device (e.g., a responding UE) initiates a logical channel prioritization (LCP) process for performing sidelink transmission in response to an acquired first sidelink authorization, where the LCP process further includes:

[0009] The first wireless communication device selects a destination from multiple destinations on the list;

[0010] The first wireless communication device selects one or more logical channels from multiple logical channels belonging to the selected destination;

[0011] The first sidelink authorization is associated with one or more channel occupancy times (COTs), and the COTs are shared by one or more second wireless communication devices with the first wireless communication device. The COTs can be received from multiple different UEs. The shared resources in different COTs overlap. For some authorizations (e.g., in the overlapping part), the shared resources can correspond to multiple COTs.

[0012] In some embodiments, the first wireless communication device identifies that the first sidelink authorization is associated with a single COT, and the single COT corresponds to a specified destination identification (ID) and a specified CAPC value; the first wireless communication device selects a destination with the specified destination ID, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; the first wireless communication device selects a logical channel that has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

[0013] In some embodiments, a first wireless communication device identifies that a first sidelink grant is associated with at least a first COT and a second COT, wherein the first COT corresponds to a first specified destination ID and a first specified CAPC value, and the second COT corresponds to a second specified destination ID and a second specified CAPC value; the first wireless communication device selects a destination having the first or second specified destination ID, the destination having sidelink data available for transmission and a CAPC value less than or equal to the first or second specified CAPC value; the first wireless communication device selects a logical channel having sidelink data available for transmission and a CAPC value less than or equal to the first or second specified CAPC value.

[0014] In some embodiments, a first wireless communication device identifies that a first sidelink grant is associated with at least a first COT and a second COT, wherein the first COT corresponds to a first specified destination list and a first specified CAPC value, and the second COT corresponds to a second specified destination list and a second specified CAPC value; the first wireless communication device selects a destination on the first or second specified destination list, the destination having sidelink data available for transmission and a CAPC value less than or equal to the first or second specified CAPC value, wherein the logical channel of the selected destination has the highest priority; the first wireless communication device selects a logical channel having sidelink data available for transmission and a CAPC value less than or equal to the first or second specified CAPC value.

[0015] The first wireless communication device receives a message from the second wireless communication device indicating sharing of one or more COTs.

[0016] In some embodiments, if no destination is selected in any of the above embodiments, the first wireless communication device selects a destination including a MAC CE and / or a logical channel having the highest priority.

[0017] In some embodiments, the first wireless communication device determines that a type 1 listen-before-talk LBT procedure for the grant will fail. If no destination is selected in any of the above embodiments, the first wireless communication device does not select a destination.

[0018] In some embodiments, the first wireless communication device determines that a type 1 LBT procedure for the grant will succeed. If no destination is selected in any of the above embodiments, the first wireless communication device selects a destination including a MAC CE and / or a logical channel having the highest priority.

[0019] In some embodiments, the first wireless communication device may identify that the size of the remainder of the first sidelink grant is less than or equal to N bytes. The first wireless communication device may transmit a padding symbol.

[0020] In some embodiments, the first wireless communication device identifies that the size of the remaining portion of the first sidelink grant is greater than or equal to N bytes; the first wireless communication device selects a logical channel without considering the CAPC value.

[0021] In some embodiments, the first wireless communication device may identify that the size of the remaining portion of the first sidelink grant is equal to or greater than N bytes to determine that the type 1 LBT procedure for the grant will succeed; the first wireless communication device selects a logical channel without considering the CAPC value.

[0022] In some embodiments, the first wireless communication device may identify that the size of the remaining portion of the first sidelink grant is equal to or greater than N bytes to determine that the type 1 LBT procedure for the grant will succeed. The first wireless communication device may select a logical channel without considering the CAPC value.

[0023] In some embodiments, the first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; in response to determining that the first sidelink grant is the first of the M sidelink grants, the first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; the first wireless communication device selects a logical channel that has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

[0024] The first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink grant is not the first of the M sidelink grants, and a destination has been selected from the specified destination ID list for the previous one of the M sidelink grants; the first wireless communication device selects a destination that includes a MAC CE and / or a logical channel with the highest priority.

[0025] In some embodiments, the first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink grant is not the first of the M sidelink grants, and a destination has been selected from the specified destination ID list for the previous one of the M sidelink grants, and no indication of LBT failure has been received; the first wireless communication device selects a destination that includes a MAC CE and / or a logical channel with the highest priority.

[0026] In some embodiments, a first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is not the first of the M sidelink authorizations, and a destination from the specified destination ID list has not been selected for the previous one of the M sidelink authorizations; the first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; the first wireless communication device selects a logical channel, where the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

[0027] In some embodiments, a first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is the last of the M sidelink authorizations, and a destination from the specified destination ID list has been selected for the previous one of the M sidelink authorizations; the first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

[0028] In some embodiments, a first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is the last of the M sidelink authorizations, and a destination from the specified destination ID list has not been selected for the previous one of the M sidelink authorizations; the first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; the first wireless communication device selects a logical channel, where the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

[0029] In some embodiments, a first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is the last of the M sidelink authorizations, and a destination from the specified destination ID list has been selected for the previous one of the M sidelink authorizations, and an indication of LBT failure has not been received; the first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

[0030] In some embodiments, a first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is not the last one among the M sidelink authorizations; the first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

[0031] In some embodiments, a second wireless communication device receives a first message from a first wireless communication device, where the first message includes first channel occupancy time (COT) assistance information; wherein, the second wireless communication device is capable of initiating sharing of the COT with the first wireless communication device. The second wireless communication device receives a third message from a third wireless communication device, where the third message includes second COT assistance information. The second wireless communication device selects the first wireless communication device to share the COT when at least one of the following conditions is met: the CAPC value indicated in the first COT assistance information is less than or equal to the CAPC value associated with the COT resource and the lowest CAPC value; the CAPC value indicated in the first COT assistance information is less than or equal to the CAPC value associated with the COT resource and the highest CAPC value; the estimated arrival or buffered data size in the first COT assistance information is the largest, where the CAPC value of the data is less than or equal to the CAPC value associated with the COT resource. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various exemplary embodiments of the present solution are described in detail below with reference to the following drawings. The drawings or figures are provided for illustrative purposes only and depict only the exemplary embodiments of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings should not be considered as a limitation on the breadth, scope, or applicability of the present solution. It should be noted that these drawings are not necessarily drawn to scale for clarity and ease of illustration.

[0033] Figure 1 An example cellular communication network according to an embodiment of the present application is shown, where the technology disclosed in the embodiments of the present application can be implemented;

[0034] Figure 2 A block diagram of an example base station and user equipment device according to an embodiment of the present application is shown;

[0035] Figure 3 A block diagram of an example of a wireless communication system according to an embodiment of the present application is shown;

[0036] Figure 4 A flowchart of an example method for wireless communication according to an embodiment of the present application is shown, the method including detecting a listen-before-talk (LBT) failure; and

[0037] Figure 5A flowchart showing an example method for performing sidelink channel occupancy time (COT) sharing on an unlicensed carrier according to an embodiment of the present application. Detailed implementation

[0038] 1. Mobile communication technology and environment

[0039] Figure 1 An example wireless communication network and / or system 100 according to an embodiment of the present application is shown, in which the technologies disclosed in the embodiments of the present application can be implemented. In the following discussion, the wireless communication network 100 can be any wireless network, such as a cellular network or a narrowband Internet of Things (NB-IoT) network, and is hereinafter referred to as "network 100". Such an example network 100 includes base stations 102 (hereinafter referred to as "BS102"; also referred to as wireless communication nodes) and user equipment devices 104 (hereinafter referred to as "UE 104"; also referred to as wireless communication devices) that can communicate with each other via communication links 110 (e.g., wireless communication channels), and a cluster of cells 126, 130, 132, 134, 136, 138, and 140 covering a geographical area 101. In Figure 1 BS102 and UE 104 are included within the respective geographical boundaries of cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one base station that operates with its allocated bandwidth to provide sufficient radio coverage to its intended users.

[0040] For example, BS102 may operate on an allocated channel transmission bandwidth to provide sufficient coverage to UE 104. BS102 and UE 104 may communicate via a downlink radio frame 118 and an uplink radio frame 124, respectively. Each radio frame 118 / 124 may be further divided into subframes 120 / 127, which may include data symbols 122 / 128. In the embodiments of the present application, BS102 and UE 104 are described as non-limiting examples of "communication nodes" that can generally practice the methods disclosed in the embodiments of the present application. According to various embodiments of the present solution, such communication nodes may be capable of wireless and / or wired communication.

[0041] Figure 2 A block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) according to some embodiments of the present solution is shown. System 200 may include components and elements configured to support known or conventional operating features that are not described in detail in the embodiments of the present application. In an illustrative embodiment, as described above, system 200 may be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment 100 such as Figure 1 in a wireless communication environment.

[0042] System 200 generally includes a base station 202 (hereinafter referred to as "BS202") and a user equipment device 204 (hereinafter referred to as "UE204"). BS202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, and each module is coupled and interconnected with each other via a data communication bus 220 as needed. UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, and each module is coupled and interconnected with each other via a data communication bus 240 as needed. BS202 communicates with UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for data transmission as described in the embodiments of the present application.

[0043] As understood by those of ordinary skill in the art, system 200 may also include any number of modules other than Figure 2 the modules shown. Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logics described in connection with the embodiments disclosed in the embodiments of the present application may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are generally described according to their functions. Whether such a function is implemented as hardware, firmware, or software depends on the specific application and design constraints imposed on the entire system. Those familiar with the concepts described in the embodiments of the present application can implement such functions in a manner suitable for each specific application, but such implementation decisions should not be construed as limiting the scope of the embodiments of the present application.

[0044] According to some embodiments, the UE transceiver 230 may herein be referred to as an "uplink" transceiver 230, which includes a radio frequency (RF) transmitter and an RF receiver, each including circuitry coupled to an antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in a time-division duplexing manner. Similarly, according to some embodiments, the BS transceiver 210 may herein be referred to as a "downlink" transceiver 210, which includes an RF transmitter and an RF receiver, each including circuitry coupled to an antenna 212. The downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in a time-division duplexing manner. The operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 to receive transmissions over the wireless transmission link 250 while the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 to receive transmissions over the wireless transmission link 250 while the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is tight time synchronization with a minimum guard time between changes in the duplex direction.

[0045] The UE transceiver 230 and the base station transceiver 210 are configured to communicate via a wireless data communication link 250 and cooperate with a suitably configured RF antenna arrangement 212 / 232 that can support a particular wireless communication protocol and modulation scheme. In some illustrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as Long Term Evolution (LTE) and emerging 5G standards. However, it should be understood that the embodiments of the present application are not necessarily limited to applications to specific standards and related protocols. Instead, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternative or additional wireless data communication protocols, including future standards or variations thereof.

[0046] According to various embodiments, for example, BS202 may be an evolved Node B (eNB), serving eNB, target eNB, femtocell, or picocell. In some embodiments, UE 204 may be embodied in various types of user equipment, such as a mobile phone, smartphone, personal digital assistant (PDA), tablet computer, laptop computer, wearable computing device, etc. The processor modules 214 and 236 may be implemented or completed with a general-purpose processor, content addressable memory, digital signal processor, application specific integrated circuit, field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof for performing the functions described in the embodiments of the present application. In this way, the processor may be implemented as a microprocessor, controller, microcontroller, state machine, etc. The processor may also be implemented as a combination of computing devices, for example, a combination of a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other such configuration.

[0047] In addition, the steps of the methods or algorithms described in connection with the embodiments disclosed in the present application may be directly embodied in hardware, firmware, software modules executed respectively by the processor modules 214 and 236, or any actual combination thereof. The memory modules 216 and 234 may be implemented as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. In this regard, the memory modules 216 and 234 may be respectively coupled to the processor modules 210 and 230 such that the processor modules 210 and 230 can respectively read information from and write information to the memory modules 216 and 234. The memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during the execution of instructions respectively executed by the processor modules 210 and 230. The memory modules 216 and 234 may also each include a non-volatile memory for respectively storing instructions to be executed by the processor modules 210 and 230.

[0048] The network communication module 218 generally represents the hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable two-way communication between the base station transceiver 210 and other network components and communication nodes configured to communicate with the base station 202. For example, the network communication module 218 may be configured to support Internet or WiMAX services. In a typical deployment, but not limited to, the network communication module 218 provides an 802.3 Ethernet interface that enables the base station transceiver 210 to communicate with a traditional Ethernet-based computer network. In this manner, the network communication module 218 may include a physical interface for connecting to a computer network (e.g., a mobile switching center (MSC)). The terms "configured for", "configured to", and their conjugates as used herein with respect to a particular operation or function refer to a device, component, circuit, structure, machine, signal, etc. that is physically constructed, programmed, formatted, and / or arranged to perform the particular operation or function.

[0049] The Open Systems Interconnection (OSI) model (referred to herein as the "Open Systems Interconnection model") is a conceptual and logical layout of network communication defined for systems (e.g., wireless communication devices, wireless communication nodes) that are open to interconnection and communication with other systems. The model is divided into seven sub-components or layers, each representing a set of concepts of services provided to the layers above and below it. The OSI model also defines a logical network and effectively describes computer packet transmission by using different layer protocols. The OSI model may also be referred to as the seven-layer OSI model or the seven-layer model. In some embodiments, the first layer may be the physical layer. In some embodiments, the second layer may be the Medium Access Control (MAC) layer. In some embodiments, the third layer may be the Radio Link Control (RLC) layer. In some embodiments, the fourth layer may be the Packet Data Convergence Protocol (PDCP) layer. In some embodiments, the fifth layer may be the Radio Resource Control (RRC) layer. In some embodiments, the sixth layer may be the Non-Access (NAS) layer or the Internet Protocol (IP) layer, and the seventh layer is another layer.

[0050] Various exemplary embodiments of the present solution are described below with reference to the accompanying drawings, so that those of ordinary skill in the art can make and use the present solution. It will be obvious to those of ordinary skill in the art that, after reading the embodiments of the present application, various changes or modifications can be made to the examples described in the embodiments of the present application without departing from the scope of the present solution. Therefore, the present solution is not limited to the exemplary embodiments and applications described and illustrated in the embodiments of the present application. Additionally, the specific order or hierarchy of steps in the methods disclosed in the embodiments of the present application is merely an exemplary method. Based on design preferences, the specific order or hierarchy of steps of the disclosed method or process can be rearranged while remaining within the scope of the present solution. Therefore, those of ordinary skill in the art will understand that the methods and techniques disclosed in the embodiments of the present application present various steps or actions in a sample order, and unless otherwise clearly stated, the present solution is not limited to the presented specific order or hierarchy.

[0051] 2. Systems and Methods for Performing Sidelink Channel Occupation Time (COT) Sharing on Unlicensed Carriers

[0052] Wireless communication is typically performed by user terminal devices and base stations. Additionally, wireless communication is performed on carriers or frequency bands. Some carriers are licensed carriers, which are carriers licensed to a service provider for exclusive use by a government or other authoritative entity. Other carriers are unlicensed carriers, i.e., carriers not licensed by such a government or other authoritative entity. Currently, user terminal devices communicate directly with each other on licensed carriers (i.e., without using a base station). However, it may be desirable for user terminal devices to communicate directly with each other on unlicensed carriers.

[0053] This specification describes various embodiments of systems, apparatuses, devices, and methods for wireless communication, which involve sidelink transmissions, including sidelink transmissions in unlicensed carriers.

[0054] Figure 3 A schematic diagram of an example wireless communication system 300 is shown, which includes a plurality of communication nodes (or simply nodes) configured to communicate wirelessly with each other. Generally, communication nodes include at least one user equipment 302 and at least one radio access node 304. Figure 3The example wireless communication system 300 shown therein is shown to include two user devices 302 (including a first user device 302(1) and a second user device 302(2)) and a wireless access node 304. However, various other examples of the wireless communication system 300 include any combination of various combinations of user devices 302 and wireless access nodes 304, including two or more user devices 302 without any wireless access nodes 304, only one user device 302 and only one wireless access node 304, only one user device 302 and two or more wireless access nodes 304, two or more user devices 302 and one or more wireless access nodes 304, or two or more wireless access nodes 304 without any user devices 302.

[0055] Generally, the user equipment described in the embodiments of the present application (for example, the user equipment 302) may include a single electronic device or apparatus capable of wireless communication through a network, or multiple (for example, network) electronic devices or apparatuses. The user equipment may include or be referred to as a user terminal, a user terminal device, or a user equipment (UE). In addition, the user equipment may be or include, but is not limited to, a mobile device (for example, a mobile phone, a smart phone, a smart watch, a tablet computer, a laptop computer, a vehicle or other means of transportation (human-powered, motor-driven, or engine-driven, as non-limiting examples, such as a car, an airplane, a train, a ship, or a bicycle)) or a fixed or stationary device (for example, a desktop computer or other computing device that generally does not move for a long time, as non-limiting examples, such as an electrical appliance, other relatively heavy devices including the Internet of Things (IoT), or computing devices used in a commercial or industrial environment). In various embodiments, the user equipment 302 may include a transceiver circuit 306 coupled to an antenna 308 to enable wireless communication with the wireless access node 304. The transceiver circuit 306 may also be coupled to a processor 310, and the processor 310 may also be coupled to a memory 312 or other storage device. The memory 312 may store instructions or code therein, which, when read and executed by the processor 310, cause the processor 310 to implement the various methods described in the embodiments of the present application.

[0056] In addition, generally, the wireless access node (e.g., wireless access node 304) described in the embodiments of the present application may include a single electronic device or apparatus, or multiple electronic devices or apparatuses (e.g., a network of electronic devices or apparatuses), and may include one or more base stations or other wireless network access points capable of wirelessly communicating with one or more user devices and / or one or more other wireless access nodes 304 via a network. For example, in various embodiments, the wireless access node 304 may include a 4G LTE base station, a 5G NR base station, a 5G central unit base station, a 5G distributed unit base station, a next-generation node B (gNB), an enhanced node B (eNB), or other similar or next-generation (e.g., 6G) base stations. The wireless access node 304 may include a transceiver circuit 314 coupled to an antenna 316, and the antenna may include an antenna tower 318 in various ways to enable wireless communication with the user device 302 or another wireless access node 104. The transceiver circuit 314 may also be coupled to one or more processors 320, and the processors may also be coupled to a memory 322 or other storage devices. The memory 322 may store instructions or code therein, which, when read and executed by the processor 320, cause the processor 320 to implement one or more methods described in the embodiments of the present application.

[0057] In various embodiments, two communication nodes in the wireless system 300 - for example, the user device 302 and the wireless access node 304, two user devices 302 without a wireless access node 304, or two wireless access nodes 304 without a user device 302 - may be configured to wirelessly communicate with each other in a mobile network and / or a wireless access network or via a mobile network and / or a wireless access network according to one or more standards and / or specifications. Generally, the standards and / or specifications may define the rules or procedures by which the communication nodes may wirelessly communicate, and in various embodiments, these rules or procedures may include rules or procedures for communicating in the millimeter (mm) waveband and / or using multi-antenna schemes and beamforming functions. Additionally or alternatively, the standards and / or specifications are those that define radio access technologies and / or cellular technologies, and as non-limiting examples, for instance, the fourth-generation (4G) long-term evolution (LTE), the fifth-generation (5G) new radio (NR), or new radio unlicensed (NR-U).

[0058] In addition, in various embodiments, two or more communication nodes in the wireless system 300 may be configured to communicate according to vehicle networking standards and / or specifications. As used in the embodiments of the present application, vehicle networking refers to a large-scale system for wireless communication and information exchange involving vehicles, pedestrians, roadside devices, and the Internet according to any of various communication protocols and data exchange standards. Vehicle networking communication can enhance the performance of vehicles in terms of driving safety, traffic efficiency, availability, or user convenience features or entertainment. In addition, in any of various embodiments, vehicle networking communication can be classified into three types: communication between vehicles (also referred to as vehicle-to-vehicle (V2V)); communication between a vehicle and a roadside device / network infrastructure (referred to as vehicle-to-infrastructure / vehicle-to-network (V2I / V2N)); and communication between a vehicle and a pedestrian (referred to as vehicle-to-pedestrian (V2P)). These types of communication are collectively referred to as vehicle-to-everything (V2X) communication. Communication nodes participating in V2X communication can communicate with each other according to any of various V2X standards or specifications.

[0059] In the wireless system 300, communication nodes are configured to wirelessly transmit signals to each other. Generally, communication between two communication nodes in the wireless system 100 can be or include transmission or reception, and is typically simultaneous, depending on the perspective of the particular node in the communication. For example, for a given communication between a first node and a second node, where the first node transmits a signal to the second node and the second node receives the signal from the first node, the first node can be referred to as the source or transmission node or device, the second node can be referred to as the destination or receiving node or device, and the communication can be considered as the transmission of the first node and the reception of the second node. Of course, since the communication nodes in the wireless system 300 can send and receive signals, a single communication node can be both a transmission / source node and a receiving / destination node at the same time, or switch between being a sending node and a receiving node.

[0060] In addition, a particular signal can be characterized or defined as an uplink (UL) signal, a downlink (DL) signal, or a sidelink (SL) signal. An uplink signal is a signal transmitted from the user equipment 302 to the radio access node 304. A downlink signal is a signal transmitted from the radio access node 304 to the user equipment 302. A sidelink signal is a signal transmitted from one user equipment 302 to another user equipment 302, or from one radio access node 304 to another radio access node 304. In addition, for sidelink transmission, the first / source user equipment 302 directly transmits the sidelink signal to the second / destination user equipment 302 without forwarding any sidelink signal to the radio access node 304.

[0061] For at least some embodiments involving V2X communication, the user equipment 302 may perform sidelink transmissions. Such sidelink communication in V2X may be referred to as PC5-based V2X communication or V2X communication. Further, for sidelink communication in V2X, the user equipment 102 may use the PC5 interface to transmit sidelink signals to each other, where PC5 refers to the reference point at which the user equipment 302 communicates with another user equipment 302 via a direct channel.

[0062] With the advancement of V2X technology, including in the automation industry, the scenarios of V2X communication are becoming increasingly diverse and require higher performance. Examples of advanced V2X services include platooning, extended sensors, advanced driving (semi-autonomous and fully autonomous driving), and remote driving. As non-limiting examples, the example performance requirements for these advanced V2X services may include: supporting data packets sized from 50 to 12,000 bytes, a transmission rate of 2 to 50 messages per second, a maximum end-to-end latency of 3 to 500 milliseconds, a reliability of 90% to 99.999%, a data rate of 0.5 to 1,000 megabits per second (Mbps), or a transmission range of 50 to 1,000 meters.

[0063] In addition, a communication node using NR radio access operating with shared spectrum channel access may be configured to operate in different modes, where the primary cell (PCell), primary and secondary cells (PSCell), or secondary cell (SCell) may be in the shared spectrum, and the SCell may or may not be configured with uplink transmission. Further, in both of these channel access modes, the radio access node 304 and the user equipment 302 may be configured to apply or perform a listen-before-talk (LBT) procedure before performing a transmission on a cell configured with shared spectrum channel access.

[0064] Example 0: LBT and CAPC

[0065] Figure 4 An example method 400 for wireless communication is shown, which includes sidelink communication between a first user equipment 302(1) and a second user equipment 302(2) on an unlicensed carrier. Embodiments of the method 400 cause the first user equipment 302(1) to act as a source or transmitting user equipment for transmitting sidelink signals to the second user equipment 302(2), while the second user equipment 302(2) acts as a destination or receiving user equipment for receiving sidelink signals from the first user equipment 302(1).

[0066] In addition, generally, a licensed carrier is a carrier, frequency band, or spectrum licensed to a service provider for exclusive use by a government or other authoritative entity (e.g., the Federal Communications Commission (FCC) in the United States or the European Telecommunications Standards Institute (ETSI) in Europe). An unlicensed carrier, also known as shared spectrum, refers to a carrier, frequency band, or spectrum that is not licensed by a government or other authoritative body.

[0067] At block 402, the first user equipment 302(1) may perform a listen-before-talk (LBT) process in an unlicensed carrier for transmitting a sidelink signal. Generally, when a user equipment 302 wants to transmit a signal (e.g., an uplink signal or a sidelink signal) on a channel in a particular carrier (unlicensed), the user equipment may perform an LBT process in that carrier before transmitting the signal. During the LBT process, the user equipment 302 may listen to or sense the channel to determine whether the channel is available (idle) or busy. In response to or as a result of performing the LBT process, the user equipment 302 may determine whether the LBT process is successful or failed. A successful indication means the channel is available, and the user equipment 302 may then proceed to transmit the signal. A failed indication means the channel is busy, and the user equipment 302 may then determine not to transmit the signal.

[0068] In various embodiments, at block 402, the first user equipment 302(1) may perform the LBT process according to a sidelink channel access priority. Specifically, during the LBT process, the amount of time the first device 302 must monitor the channel may depend on the value of the sidelink channel access priority. In addition, if the LBT process is successful, the amount of time resources occupied by the channel may depend on the value of the sidelink channel access priority.

[0069] In some of these embodiments, the sidelink channel access priority is the sidelink channel access priority of the sidelink logic. For example, the first user equipment 302(1) may be configured with multiple logical channels, and each logical channel may have or be mapped to an associated priority value of the sidelink channel access priority. For different logical channels, the priority values may be the same as or different from each other. Accordingly, when the first user equipment 302(1) determines to transmit data (e.g., data of a MAC protocol data unit (PDU)) as part of a sidelink signal, the first user equipment 302(1) may determine the logical channel corresponding to the data and then determine the priority value corresponding to the logical channel. The first user equipment 302(1) may then perform the LBT process according to the determined priority value.

[0070] Example 1: COT Auxiliary Information

[0071] During sidelink on an unauthorized frequency band (SL-U), when a UE (e.g., the UE that initiates a Channel Occupation Time (COT)) obtains a COT on SL-U, the UE can initiate a COT shared with one or more responding UEs. However, the mimicking UE may not know the traffic pattern or buffer size information of the candidate COT responding UEs. If there are multiple candidate responding UEs, it may be difficult to determine which UE can be selected to initiate a shared COT with it. If the selected COT responding UE has no available data to send during the shared COT, the COT will be wasted. To solve this problem, before the UE initiates a COT shared with one or more responding UEs, the UE can receive COT assistance information from at least one responding UE.

[0072] Embodiment 1-1: Content of COT Assistance Information

[0073] If a UE can be a candidate COT responding UE, the UE can send COT assistance information to the candidate COT initiating UE. The COT assistance information can include the traffic pattern or buffer size information of the UE.

[0074] In some embodiments, the COT assistance information can include at least one of the following: trafficPeriodicity, duration, RBNum or SubbandNum, MintimingOffset, MaxtimingOffset, channelAccessPriority, or buffer size information. trafficPeriodicity can indicate the estimated data arrival period (e.g., the value ms20 corresponds to 20 ms, and ms50 corresponds to 50 ms). The duration can indicate the estimated data arrival duration. RBNum or SubbandNum can indicate the maximum number of RBs or subbands based on the observed traffic pattern. MintimingOffset can indicate the minimum estimated timing of packet arrival. MaxtimingOffset can indicate the maximum estimated timing of packet arrival. The channel access priority can indicate the channel access priority of estimated data arrival. The buffer size information can indicate the buffer size information.

[0075] Embodiment 1-1-1: A Set of Parameters

[0076] If SL data of multiple logical channels associated with different Channel Access Priority Class (CAPC) values is available, and the COT assistance information only includes a set of parameters, at least one of the following steps can be considered for setting the CAPC value in the COT assistance information: selecting the lowest CAPC value of the available logical channels, or selecting the highest CAPC value of the available logical channels.

[0077] Embodiment 1-1-2: A set of parameters

[0078] If SL data of multiple logical channels associated with different Channel Access Priority Class (CAPC) values is available or will be available, the COT assistance information may include N sets of parameters, and one set of parameters may be associated with one CAPC value.

[0079] If SL data of multiple logical channels associated with N CAPC values is available, the COT assistance information may include N sets of parameters, and one set of parameters is associated with one CAPC value.

[0080] For example, if SL data is available or predicted for logical channel 1 configured with CAPC value 1, and SL data is available for logical channel 2 configured with CAPC value 2, the UE may determine at least one of the following: trafficPeriodicity, duration, RBNum, SubbandNum, MintimingOffset, MaxtimingOffset, or buffer size information of logical channel 1 and / or logical channel 2. The UE may send the COT assistance information to other candidate COT initiating UEs, and the COT assistance information includes at least one of the parameters of the above CAPC value 1 and / or CAPC value 2. The COT assistance information may include one or more sets of logical channel parameters for each CAPC value. One set of parameters may be at least one of the following: trafficPeriodicity, duration, RBNum, SubbandNum, MintimingOffset, MaxtimingOffset, or buffer size information.

[0081] For another example, if the SL data is available for logical channel 1 configured with a CAPC value of 1, and the SL data is available for logical channels 2 and 3 configured with a CAPC value of 2, the UE may determine at least one of the trafficPeriodicity, duration, RBNum, SubbandNum, MintimingOffset, MaxtimingOffset, or buffer size information for logical channel 1 and / or logical channel 2 / 3. The UE may send COT assistance information to other candidate COT initiating UEs, and the COT assistance information includes at least one of the above parameters of CAPC value 1 and / or CAPC value 2. Since the CAPC value 2 is associated with two logical channels, the CAPC value 2 may be associated with two sets of parameters of trafficPeriodicity, duration, RBNum, SubbandNum, MintimingOffset, MaxtimingOffset, or buffer size information. However, if the trafficPeriodicity, minimum timing offset, or maximum timing offset of logical channels 2 and 3 are the same or very similar, the CAPC value 2 may be associated with only one set of parameters of trafficPeriodicity, Duration, RBNum, SubbandNum, MintimingOffset, MaxtimingOffset, or buffer size information. For this case, the RBNum, SubbandNum, or buffer size information may be the sum of logical channels 2 and 3.

[0082] If the CAPC value x is associated with more than one logical channel, the COT assistance information may include one or more sets of parameters of the CAPC value x.

[0083] If the traffic of logical channel L has no periodic character, the parameter set may not include trafficPeriodicity. The parameter set may include buffer size information for each CAPC value. If a CAPC value is associated with multiple logical channels, the buffer size may be the sum of all relevant logical channels.

[0084] If the CAPC value x is associated with more than one logical channel, the COT assistance information may include one or more sets of parameters of the CAPC value x.

[0085] In some embodiments, if the SL data is available for logical channel 1 configured with a CAPC value of 1, and the SL data is available for logical channels 2 and 3 both configured with a CAPC value of 2, logical channel 1 may be associated with destination ID 1, logical channel 2 may be associated with destination ID 2, and logical channel 3 may be associated with destination ID 3.

[0086] In addition, if the COT resources from the candidate COT initiating UE-1 can be used for sidelink transmissions associated with destination ID 1, the COT resources from the candidate COT initiating UE-2 can be used for transmissions associated with destination ID 2, and the COT resources from the candidate COT initiating UE-3 can be used for sidelink transmissions associated with destination ID 3.

[0087] The UE may send COT assistance information to the candidate COT initiating UE-1, and the information only includes the parameters for logical channel 1 with a CAPC value of 1. The UE may send COT assistance information to the candidate COT initiating UE-2, and the information only includes the parameters for logical channel 2 with a CAPC value of 2. The UE may send COT assistance information to the candidate COT initiating UE-3, and the information only includes the parameters for logical channel 3 with a CAPC value of 2. The COT assistance information may only include the parameters of the logical channel associated with the dedicated destination ID. The dedicated destination ID may correspond to the candidate COT initiating UE.

[0088] Embodiment 1-2: When to send COT assistance information

[0089] If SL resources are allocated when configured with the network scheduling mode, or SL resources are selected when configured with the UE selection mode, and the number of padding bits is equal to or greater than the size of the COT assistance information plus its sub-header, the UE may send the COT assistance information. In this case, the COT assistance information may be carried in the SL MAC CE.

[0090] The COT assistance information may include a buffer size field and a CAPC value field. The buffer size field may identify the total amount of data available on all logical channels with the CAPC value of the destination. The CAPC value field may identify the CAPC value of the logical channel for which the SL buffer status is being reported. The length of this field may be 2 bits.

[0091] 1> If the number of padding bits is equal to or greater than the size of the field that only includes one of the CAPC value and the buffer size plus its sub-header, but less than the size of the field that includes all CAPC values and the buffer size plus its sub-header:

[0092] 2> If there is data available for transmission on more than one logical channel associated with more than one CAPC value, then

[0093] report the CAPC value and the buffer size using the logical channel with the highest priority for which there is data available for transmission; or

[0094] report the CAPC value and the buffer size using the logical channel with the lowest priority for which there is data available for transmission; or

[0095] Report the CAPC values and buffer sizes using logical channels with data available for transmission, in descending order of the highest priority logical channel associated with each of these CAPCs; or

[0096] Report the CAPC values and buffer sizes using logical channels with data available for transmission, in ascending order of the highest priority logical channel associated with each of these CAPCs.

[0097] 1> If the number of padding bits is equal to or greater than the field size including all CAPC values and buffer sizes plus its sub-header:

[0098] 2> Report the CAPC values and buffer sizes of all logical channels with data available for transmission.

[0099] If the UE can be a candidate COT response UE, the UE can send COT assistance information to the candidate COT initiating UE when at least one of the following conditions is met: the content of the COT assistance information has changed; SL data of a logical channel becomes available and the SL data belongs to a logical channel with a higher priority than any logical channel containing available SL data associated with any CAPC value; SL data of a logical channel associated with a higher priority CAPC value becomes available; SL data of a logical channel associated with a lower priority CAPC value becomes available; an LBT failure has been detected; a timer has expired; or when receiving a message from the candidate COT initiating UE, the message indicates that the candidate COT initiating UE can share COT resources.

[0100] Embodiments 1 - 3: COT Initiating UE Trigger

[0101] If the UE can be a COT initiating UE, the UE can send a COT sharing indication to one or more candidate COT response UEs before sending COT information to the COT response UE. The COT sharing indication can indicate that the UE provides COT sharing resources. In addition, the COT sharing indication can also carry a CAPC value that indicates the allowed CAPC value or the highest allowed CAPC value when the COT response UE uses the COT resources. In addition, the COT sharing indication can carry a list of destination IDs that indicates which destination IDs can use the COT resources.

[0102] In some embodiments, after the candidate COT response UE receives the COT sharing indication, the UE can send COT assistance information to the candidate COT initiating UE.

[0103] In some embodiments, after the candidate COT response UE receives a COT sharing indication with a CAPC value, the UE may send COT assistance information to the candidate COT initiating UE, where the COT assistance information includes one or more sets of parameters associated with CAPC values less than or equal to the value indicated in the COT sharing indication.

[0104] In some embodiments, after the candidate COT response UE receives a COT sharing indication with a destination ID list, the UE may send COT assistance information to the candidate COT initiating UE, where the COT assistance information includes one or more sets of parameters associated with the destination ID indicated in the COT sharing indication. When multiple sets of parameters are included in the COT assistance information, the values may be indexed sequentially in all lists in the same order as presented in the COT sharing indication.

[0105] In some embodiments, the COT sharing indication may be carried in sidelink control information (SCI), MAC CE, or SLRRC message.

[0106] Example 2: Receiving COT assistance information

[0107] After the second UE (e.g., COT initiating UE) receives the COT assistance information, the UE may consider the COT assistance information when deciding which UE is the COT response UE.

[0108] In some embodiments, the second UE (e.g., COT initiating UE) receives multiple COT assistance information from multiple candidate COT response UEs. For a COT resource, if based on the COT assistance information, multiple candidate COT response UEs can use the COT resource, the UE may select the COT response UE for the COT according to at least one of the following schemes: the CAPC value indicated in the COT assistance information is equal to or less than the CAPC value associated with the COT resource and the lowest CAPC value; the CAPC value indicated in the COT assistance information is equal to or less than the CAPC value associated with the COT resource and the highest CAPC value; or the size of the estimated arriving or cached data is the largest, where the CAPC value of the data is equal to or less than the CAPC value associated with the COT resource.

[0109] Example 3: Logical channel prioritization (LCP)

[0110] Based on the existing LCP process, the UE needs to select a destination in the first step and then select an LCH that belongs to the destination and meets some other defined conditions (e.g., CG and / or HARQ restrictions).

[0111] In some embodiments, when the first UE obtains a sidelink grant, if the UE wants to use the COT resource and perform type 2 LBT detection, the data multiplexed in the grant can meet some conditions (for example, there is data destined for the initiating UE and the CAPC of the data is less than or equal to the CAPC indicated in the COT information). Otherwise, the UE may have to perform type 1 LBT.

[0112] After the first UE obtains a sidelink grant, the UE can decide which type of LBT can be used for the transmission.

[0113] In some embodiments, if the grant does not correspond to any shared COT, or the grant corresponds to a shared COT but the UE decides that type 1 LBT may succeed, the UE can perform a logical channel prioritization (LCP) process. If the grant corresponds to any shared COT, the UE can consider first selecting the destination indicated in the COT information during the LCP process.

[0114] Example 3-1: A COT scenario

[0115] When the first UE obtains a sidelink grant, the first UE can perform a sidelink logical channel prioritization (LCP) process to obtain the media access control protocol data unit (MAC PDU) to be transmitted. During the sidelink logical channel prioritization process, the UE can determine which destination identifier (ID) can be selected. The first UE can further determine which logical channels can be selected for the selected destination ID.

[0116] In some embodiments, the first UE can obtain the first COT from the second UE or the network (e.g., gNB). If the first UE obtains a sidelink grant, at least one of the following cases can be performed.

[0117] Case 1: If the sidelink grant corresponds to the first shared COT, or the sidelink grant corresponds to the first shared COT, type 1 LBT may fail for the grant. The first COT resource is associated with a destination x and a CAPC value x. During the sidelink logical channel prioritization process, the first UE can select destination x when there is at least one of the following at the destination: MAC CE and a logical channel with SL data available for transmission, and the CAPC value is equal to or less than the associated CAPC value x.

[0118] In some embodiments, the first UE can select a MAC CE or a logical channel that meets all of the following conditions in the logical channels belonging to the selected destination: SL data is available for transmission; and the CAPC value is equal to or less than the associated CAPC value.

[0119] Scenario 2: If the sidelink authorization is associated with the first COT resource, the first COT resource may be associated with a list of (more than one) destinations and a CAPC value x. During the sidelink logical channel prioritization process, if any destination belonging to the list includes at least one of a MAC CE and the logical channel with the highest priority in the logical channel and MAC CE that meet all of the following conditions, the first UE may select a destination from the list of destinations. The logical channel with SL data available for transmission and the CAPC value may be equal to or less than the associated CAPC value x. The first UE may select a MAC CE or logical channel that meets all of the following conditions in the logical channel belonging to the selected destination: SL data is available for transmission; and the CAPC value is equal to or less than the CAPC value associated with the selected destination or COT.

[0120] For Scenario 1 and Scenario 2, if destination x or any destination belonging to the list of destinations has neither a MAC CE nor a logical channel with SL data available for transmission, and the CAPC value is equal to or less than the associated CAPC value x, at least one of the following scenarios may be performed.

[0121] In some embodiments, the UE may perform the LCP process. For example, the UE may select a destination that includes at least one of a MAC CE and the logical channel with the highest priority in the logical channel that meets some conditions.

[0122] In some embodiments, if the UE determines that type 1 LBT may fail for the authorization, the UE may ignore the authorization, or alternatively, the UE may not select anything for the authorization.

[0123] In some embodiments, if the UE determines that type 1 LBT may succeed for the authorization, the UE may perform the LCP process. For example, the UE may select a destination that includes at least one of a MAC CE and the logical channel with the highest priority in the logical channel that meets some conditions.

[0124] Scenario 3: If the sidelink authorization is associated with the first COT resource, the first COT resource may be associated with a CAPC value x. During the sidelink logical channel prioritization process, the first UE may select a destination that includes at least one of a MAC CE and the logical channel with the highest priority in the logical channel and MAC CE that meet all of the following conditions: the logical channel with SL data available for transmission, and the CAPC value is equal to or less than the associated CAPC value x.

[0125] The first UE may select a MAC CE or a logical channel that meets all of the following conditions in a logical channel belonging to the selected destination: SL data is available for transmission; and the CAPC value is equal to or less than the CAPC value associated with the selected destination or COT.

[0126] For the above cases 1, 2, and 3, after the first UE selects a MAC CE or a logical channel that meets all the conditions, at least one of the following cases may be executed.

[0127] In some embodiments, if the left link grant size is equal to or less than N bytes, the MAC entity may transmit a filler.

[0128] In some embodiments, if the left link grant size is equal to or greater than N bytes and the UE determines that type 1 LBT may fail for the grant, the UE may transmit a filler.

[0129] In some embodiments, if the left link grant size is equal to or greater than N bytes, the UE may select a MAC CE or a logical channel belonging to the selected destination without considering the CAPC value.

[0130] In some embodiments, if the left link grant size is equal to or greater than N bytes and the UE determines that type 1 LBT may successfully obtain the grant, the UE may select a MAC CE or a logical channel belonging to the selected destination without considering the CAPC value of the logical channel.

[0131] In some embodiments, the value N may be configured by the network, may be pre-configured, or may be defined.

[0132] Example 3-2: UE Obtains Grants Corresponding to Multiple COTs

[0133] In some embodiments, the first UE may obtain a first COT from the second UE or the network, and / or may obtain a second COT from the third UE or the network (e.g., gNB). If the first UE obtains a sidelink grant, and if the sidelink grant is related to the first COT resource and the second COT resource, the first COT resource may be associated with a destination x and a CAPC value x, and the second COT resource may be associated with a destination y and a CAPC value y. During the sidelink logical channel prioritization process, among the logical channels that satisfy all of the following conditions, if any destination belonging to the list includes at least one of the MAC CE and the logical channel with the highest priority, the first UE may select a destination from the list of [destination x, destination y]: the logical channel having SL data available for transmission; and the CAPC value of the logical channel belonging to destination x is equal to or less than the CAPC value x; or the CAPC value of the logical channel belonging to destination y is equal to or less than the CAPC value y.

[0134] In some embodiments, among the logical channels that satisfy all of the following conditions, if any destination belonging to the list includes at least one of the MAC CE and the logical channel with the highest buffer size, the first UE may select a destination from the list of [destination x, destination y]: the logical channel having SL data available for transmission; and the CAPC value of the logical channel belonging to destination x is equal to or less than the CAPC value x; or the CAPC value of the logical channel belonging to destination y is equal to or less than the CAPC value y.

[0135] The first UE may select a MAC CE or a logical channel that satisfies all of the following conditions in the logical channel belonging to the selected destination: SL data is available for transmission; and the CAPC value is equal to or less than the CAPC value associated with the selected destination.

[0136] For another embodiment, if the sidelink grant is related to the first COT resource and the second COT resource, and the first COT resource is associated with a destination x and a CAPC value x, the second COT resource may be associated with a destination y and a CAPC value y, the UE may ignore the grant, or alternatively, the UE may not select anything for the grant.

[0137] If the sidelink grant is related to a first COT resource and a second COT resource, and the first COT resource is associated with a destination list x and a CAPC value x, then the second COT resource may be associated with a destination list y and a CAPC value y. During the sidelink logical channel prioritization process, among the logical channels that satisfy all of the following conditions, if any destination belonging to the list includes at least one of the MAC CE and the logical channel with the highest priority, the first UE may select a destination from the destination list x and the list y: a logical channel with SL data available for transmission; and the CAPC value of the logical channel belonging to the destination list x is equal to or less than the CAPC value x; or the CAPC value of the logical channel belonging to the destination list y is equal to or less than the CAPC value y.

[0138] The first UE may select a MAC CE or a logical channel that satisfies all of the following conditions in the logical channel belonging to the selected destination: SL data is available for transmission; and the CAPC value is equal to or less than the CAPC value associated with the selected destination.

[0139] Embodiment 3-3: The UE obtains M (M>1) grants corresponding to the same COT

[0140] If the UE obtains M (M>1) grants corresponding to the same COT, there may be several scenarios.

[0141] Scenario 1: If the grant is the first of the M grants, the UE may perform the sidelink logical channel prioritization process as in Implementation Example 3-1.

[0142] If the grant is not the first of the M grants, and the UE has already selected a destination corresponding to the COT of the previous grant among the M grants, the UE may select a destination that includes at least one of the MAC CE and the logical channel with the highest priority, and then select a MAC CE or a logical channel that satisfies all of the following conditions in the logical channel belonging to the selected destination: SL data is available for transmission; and the CAPC value is equal to or less than the CAPC value associated with the selected destination.

[0143] If the grant is not the first of the M grants, and the UE has already selected a destination corresponding to the COT, and has not received an LBT failure indication for the previous grant among the M grants, the UE may select a destination that includes at least one of the MAC CE and the logical channel with the highest priority, and then select a MAC CE or a logical channel that satisfies all of the following conditions in the logical channel belonging to the selected destination: SL data is available for transmission; and the CAPC value is equal to or less than the CAPC value associated with the selected destination.

[0144] Solution 2: If the grant is not the last one among the M grants, the UE can select a destination including at least one of the MAC CE and the logical channel with the highest priority, and then select a MAC CE or a logical channel in the logical channel belonging to the selected destination that satisfies all of the following conditions: SL data is available for transmission; and the CAPC value is equal to or less than the CAPC value associated with the selected destination.

[0145] If the grant is the last one among the M grants, and the UE has selected a destination corresponding to the COT for the previous grant among the M grants, or the UE has selected a destination corresponding to the COT for the previous grant among the M grants and has not received an LBT failure indication, the UE can select a destination including at least one of the MAC CE and the logical channel with the highest priority, and then select a MAC CE or a logical channel in the logical channel belonging to the selected destination that satisfies all of the following conditions: SL data is available for transmission; and the CAPC value is equal to or less than the CAPC value associated with the selected destination.

[0146] If the grant is the last one among the M grants, and the UE has not selected a destination corresponding to the COT for the previous grant among the M grants, or the UE has selected a destination corresponding to the COT for the previous grant among the M grants and has received an LBT failure indication, the UE can perform a sidelink logical channel prioritization process, such as Implementation Example 3-1.

[0147] Example 4: Consistent LBT Failure

[0148] In SL-U, an SL-specific LBT failure indication counter (e.g., SL_LBT_counter) can be introduced for SL-specific consistent LBT failure detection. If an SL-specific LBT failure indication is received from the lower layer, the SL-specific LBT failure indication counter (e.g., SL_LBT_counter) can be incremented by 1. If the SL-specific LBT failure indication counter value is equal to or greater than the SL-specific maximum LBT failure instance count threshold (e.g., sl-LBT-FailureInstanceMaxCount), a consistent LBT failure can be triggered / declared by the MAC entity.

[0149] If a UE can perform sidelink in multiple RB sets, the UE can maintain multiple SL-specific LBT failure indication counters for each RB set. For example, if a physical sidelink shared channel (PSSCH) corresponds to multiple PSFCHs, for example, N PSFCHs, when LBT failure is detected for any one of the N PSFCHs, the SL-specific LBT failure indication counter for the RB SET can be incremented by 1. For another example, when LBT failure is detected for all N PSFCHs, the SL-specific LBT failure indication counter for the RB SET can be incremented by 1.

[0150] It should be understood that one or more features from the above-described implementations are not exclusive to a particular implementation, but may be combined in any manner (eg, in any priority and / or order, simultaneously or otherwise).

[0151] Figure 5 A flow chart of a method 500 for performing sidelink channel occupancy time (COT) sharing on an unlicensed carrier / shared spectrum is shown. The method 500 may be used in conjunction with the embodiment of the present application. Figure 1 and Figure 2 The method 500 may be implemented by any one or more components and devices described in detail. In general, in some embodiments, the method 500 may be performed by a wireless communication device (e.g., a UE). Depending on the embodiment, additional, fewer, or different operations may be performed in the method 500. At least one aspect of the operation relates to a system, method, apparatus, or computer-readable medium.

[0152] A first wireless communication device (e.g., a responding UE) sends a first message including Channel Occupancy Time (COT) assistance information to a second wireless communication device (e.g., an initiating UE). The second wireless communication device can initiate sharing of the COT with the first wireless communication device. The COT assistance information includes one or more sets of parameters for each Channel Access Priority Level (CAPC) value, each set of parameters being associated with one or more logical channels. Each set of parameters includes at least one of the following: traffic periodicity (trafficPeriodicity), duration (Duration), number of radio bearers (RBNum), number of subbandwidths (SubbandNum), minimum bandwidth offset (MintimingOffset), maximum bandwidth offset (MaxtimingOffset), or buffer size information. When a CAPC value is associated with multiple logical channels, the COT assistance information includes multiple sets of parameters for the CAPC value. When a CAPC value is associated with multiple logical channels, the buffer size information or estimated data arrival amount corresponds to the sum of all associated logical channels.

[0153] In some embodiments, the COT assistance information includes parameters of one or more logical channels associated with a corresponding dedicated destination identifier ID. The COT assistance information includes a buffer size field and a CAPC value field. The buffer size field is used to indicate the total amount of data available on all logical channels associated with the CAPC value, and the CAPC value field is used to indicate the CAPC value of one or more logical channels having a reported sidelink buffer status.

[0154] In some embodiments, the first wireless communication device determines to send the COT assistance information when at least one of the following is satisfied: the content of the COT assistance information has changed; the sidelink data of a logical channel has become available, and the logical channel where the sidelink data is located has a higher priority than any other logical channel containing available sidelink data; the sidelink data of a logical channel associated with a higher priority CAPC value has become available; the sidelink data of a logical channel associated with a lower priority CAPC value has become available; a listen-before-talk LBT failure has been detected; a timer has expired; the first wireless communication device has received a second message from the second wireless communication device indicating that the second wireless communication device is capable of providing COT; X LBT failures have been detected.

[0155] In some embodiments, before sending the COT assistance information, the first wireless communication device receives a second message from the second wireless communication device, and the second message is used to indicate the sharing of COT. Among them, the second message is also used to indicate one or more destination IDs. The COT assistance information includes multiple sets of parameters, and the values of the multiple sets of parameters are sequentially indexed in the same order as presented in the second message. The second wireless communication device selects the first wireless communication device to share COT when at least one of the following is satisfied: the CAPC value indicated in the COT assistance information is less than or equal to the CAPC value associated with the COT resource and the lowest CAPC value; the CAPC value indicated in the COT assistance information is less than or equal to the CAPC value associated with the COT resource and the highest CAPC value; the estimated arrival or cached data size in the COT assistance information is the largest, where the CAPC value of the data is less than or equal to the CAPC value associated with the COT resource.

[0156] In some embodiments, the first wireless communication device (e.g., a responding UE) initiates a logical channel prioritization LCP process for performing sidelink transmission in response to an acquired first sidelink grant, where the LCP process further includes:

[0157] The first wireless communication device selects a destination from multiple destinations on the list;

[0158] The first wireless communication device selects one or more logical channels from multiple logical channels belonging to the selected destination;

[0159] Among them, the first sidelink authorization is associated with one or more channel occupancy times (COTs), and the COTs are shared by one or more second wireless communication devices and the first wireless communication device. The COTs can be received from multiple different UEs. The shared resources in different COTs overlap. For some authorizations (e.g., in the overlapping part), the shared resources can correspond to multiple COTs.

[0160] In some embodiments, the first wireless communication device identifies that the first sidelink authorization is associated with a single COT, and the single COT corresponds to a specified destination identifier (ID) and a specified CAPC value; the first wireless communication device selects a destination with the specified destination ID, and the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; the first wireless communication device selects a logical channel, and the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

[0161] In some embodiments, the first wireless communication device identifies that the first sidelink authorization is associated with at least a first COT and a second COT, where the first COT corresponds to a first specified destination ID and a first specified CAPC value, and the second COT corresponds to a second specified destination ID and a second specified CAPC value; the first wireless communication device selects a destination with the first or second specified destination ID, and the destination has sidelink data available for transmission and a CAPC value less than or equal to the first or second specified CAPC value; the first wireless communication device selects a logical channel, and the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the first or second specified CAPC value.

[0162] In some embodiments, the first wireless communication device identifies that the first sidelink authorization is associated with at least a first COT and a second COT, where the first COT corresponds to a first specified destination list and a first specified CAPC value, and the second COT corresponds to a second specified destination list and a second specified CAPC value; the first wireless communication device selects a destination on the first or second specified destination list, and the destination has sidelink data available for transmission and a CAPC value less than or equal to the first or second specified CAPC value, where the logical channel of the selected destination has the highest priority; the first wireless communication device selects a logical channel, and the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the first or second specified CAPC value.

[0163] The first wireless communication device receives a message from the second wireless communication device indicating sharing of one or more COTs.

[0164] In some embodiments, if no destination is selected in any of the above embodiments, the first wireless communication device selects a destination, which includes a MAC CE and / or a logical channel with the highest priority.

[0165] In some embodiments, the first wireless communication device determines that the type 1 listen-before-talk (LBT) process for authorization will fail. If no destination is selected in any of the above embodiments, the first wireless communication device does not select a destination.

[0166] In some embodiments, the first wireless communication device determines that the type 1 LBT process for authorization will succeed. If no destination is selected in any of the above embodiments, the first wireless communication device selects a destination, which includes a MAC CE and / or a logical channel with the highest priority.

[0167] In some embodiments, the first wireless communication device can identify that the size of the remaining part of the first sidelink authorization is less than or equal to N bytes. The first wireless communication device can transmit a filler.

[0168] In some embodiments, the first wireless communication device identifies that the size of the remaining part of the first sidelink authorization is greater than or equal to N bytes; the first wireless communication device selects a logical channel without considering the CAPC value.

[0169] In some embodiments, the first wireless communication device can identify that the size of the remaining part of the first sidelink authorization is equal to or greater than N bytes to determine that the type 1 LBT process for authorization will succeed; the first wireless communication device selects a logical channel without considering the CAPC value.

[0170] In some embodiments, the first wireless communication device can identify that the size of the remaining part of the first sidelink authorization is equal to or greater than N bytes to determine that the type 1 LBT process for authorization will succeed. The first wireless communication device can select a logical channel without considering the CAPC value.

[0171] In some embodiments, the first wireless communication device obtains M sidelink authorizations corresponding to the same cycle of transmissions (COT), where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; in response to determining that the first sidelink authorization is the first of the M sidelink authorizations, the first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; the first wireless communication device selects a logical channel, where the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

[0172] The first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is not the first of the M sidelink authorizations, and a destination from the specified destination ID list has been selected for the previous one of the M sidelink authorizations; the first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

[0173] In some embodiments, the first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is not the first of the M sidelink authorizations, and a destination from the specified destination ID list has been selected for the previous one of the M sidelink authorizations, and an indication of LBT failure has not been received; the first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

[0174] In some embodiments, the first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is not the first of the M sidelink authorizations, and a destination from the specified destination ID list has not been selected for the previous one of the M sidelink authorizations; the first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; the first wireless communication device selects a logical channel, where the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

[0175] In some embodiments, the first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is the last of the M sidelink authorizations, and a destination from the specified destination ID list has been selected for the previous one of the M sidelink authorizations; the first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

[0176] In some embodiments, a first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is the last one of the M sidelink authorizations, and for the previous one of the M sidelink authorizations, a destination from the specified destination ID list has not been selected; the first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; the first wireless communication device selects a logical channel, where the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

[0177] In some embodiments, a first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is the last one of the M sidelink authorizations, and for the previous one of the M sidelink authorizations, a destination from the specified destination ID list has been selected and an indication of LBT failure has not been received; the first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

[0178] In some embodiments, a first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; the first wireless communication device determines that the first sidelink authorization is not the last one of the M sidelink authorizations; the first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

[0179] In some embodiments, a second wireless communication device receives a first message from a first wireless communication device, where the first message includes first channel occupancy time (COT) assistance information; where the second wireless communication device is capable of initiating sharing of the COT with the first wireless communication device. The second wireless communication device receives a third message from a third wireless communication device, where the third message includes second COT assistance information. The second wireless communication device selects the first wireless communication device to share the COT when at least one of the following is satisfied: the CAPC value indicated in the first COT assistance information is less than or equal to the CAPC value associated with the COT resource and the lowest CAPC value; the CAPC value indicated in the first COT assistance information is less than or equal to the CAPC value associated with the COT resource and the highest CAPC value; the estimated arrival or cached data size in the first COT assistance information is the largest, where the CAPC value of the data is less than or equal to the CAPC value associated with the COT resource.

[0180] Although various embodiments of the present solution have been described above, it should be understood that they are given by way of example only and not by way of limitation. Similarly, the various figures may depict example architectures or configurations provided to enable those of ordinary skill in the art to understand the exemplary features and functions of the present solution. However, those skilled in the art will understand that the present solution is not limited to the example architectures or configurations shown, but can be implemented using a variety of alternative architectures and configurations. Additionally, as will be understood by those of ordinary skill in the art, one or more features of one embodiment may be combined with one or more features of another embodiment described in the embodiments of the present application. Therefore, the breadth and scope of the embodiments of the present application should not be limited by any of the above exemplary embodiments.

[0181] It should also be understood that any reference in the embodiments of the present application to elements using names such as "first", "second", etc. generally does not limit the number or order of those elements. On the contrary, these names can be used in the embodiments of the present application as a convenient means for distinguishing between two or more elements or examples of an element. Therefore, the reference to the first and second elements does not imply that only two elements can be employed, or that the first element must be located before the second element in a certain manner.

[0182] In addition, those of ordinary skill in the art will understand that any of a variety of different technologies can be used to represent information and signals. For example, the data, instructions, commands, information, signals, bits, and symbols referred to in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0183] Those of ordinary skill in the art will further understand that any of the various illustrative logical blocks, modules, processors, devices, circuits, methods, and functions described in connection with the aspects disclosed in the embodiments of the present application can be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of both), firmware, various forms of programs or design code containing instructions (which may be referred to as "software" or "software modules" for convenience in the embodiments of the present application), or any combination of these technologies. To clearly illustrate this interchangeability of hardware, firmware, and software, the various illustrative components, blocks, modules, circuits, and steps have generally been described above in terms of their functionality. Implementing such functionality as hardware, firmware, or software, or a combination of these technologies, depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functionality in various ways for each specific application, but such implementation decisions will not depart from the scope of the embodiments of the present application.

[0184] In addition, those of ordinary skill in the art will understand that the various illustrative logical blocks, modules, devices, components, and circuits described in the embodiments of the present application can be implemented within or executed by an integrated circuit (IC) including a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, or any combination thereof. The logical blocks, modules, and circuits can further include antennas and / or transceivers to communicate with various components within a network or within a device. The general-purpose processor can be a microprocessor, but alternatively, the processor can be any conventional processor, controller, or state machine. The processor can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other suitable configuration to perform the functions described in the embodiments of the present application.

[0185] If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of the methods or algorithms disclosed in the embodiments of the present application can be implemented as software stored on a computer-readable medium. The computer-readable medium includes computer storage media and communication media, and the communication media includes any medium that can transfer a computer program or code from one place to another. The storage media can be any available medium accessible by a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM, or other optical disk storage, magnetic disk storage, or other magnetic storage devices, and any other medium that can be used to store the desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0186] The term "module" as used in the embodiments of the present application refers to software, firmware, hardware, and any combination of these elements to perform the related functions described in the embodiments of the present application. Additionally, for purposes of discussion, the various modules are described as discrete modules; however, it will be apparent to those of ordinary skill in the art that two or more modules can be combined to form a single module that performs the related functions according to the embodiments of the present solution.

[0187] In addition, a memory or other storage and communication components may be employed in the application embodiments. It should be understood that, for clarity, the above description has described embodiments of the present solution with reference to different functional units and processors. However, it will be apparent that any suitable functional distribution between different functional units, processing logic elements or domains may be used without departing from the present solution. For example, functions illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Thus, the reference to a particular functional unit is only a reference to a suitable device for providing the described function, rather than indicating a strict logical or physical structure or organization.

[0188] Various modifications to the embodiments described in the embodiments of the present application will be apparent to those skilled in the art, and the general principles defined in the embodiments of the present application may be applied to other embodiments without departing from the scope of the embodiments of the present application. Therefore, the embodiments of the present application are not intended to be limited to the embodiments shown in the embodiments of the present application, but rather to be accorded the widest scope consistent with the novel features and principles disclosed in the embodiments of the present application, as set forth in the claims.

Claims

1. A wireless communication method, comprising: The first wireless communication device sends a first message including Channel Occupancy Time (COT) assistance information to the second wireless communication device; Wherein, the second wireless communication device is capable of initiating sharing of the COT with the first wireless communication device.

2. The wireless communication method according to claim 1, wherein, The COT assistance information includes one or more sets of parameters for each Channel Access Priority Class (CAPC) value, and each set of parameters is associated with one or more logical channels.

3. The wireless communication method according to claim 2, wherein, Each set of parameters includes at least one of the following: traffic periodicity, duration, number of radio bearers, number of sub - bandwidths, minimum bandwidth offset, maximum bandwidth offset, or buffer size information.

4. The wireless communication method according to claim 2, wherein, In the case where one CAPC value is associated with multiple logical channels, the COT assistance information includes multiple sets of parameters for the CAPC value.

5. The wireless communication method according to claim 3, wherein, In the case where one CAPC value is associated with multiple logical channels, the buffer size information or data estimated arrival amount corresponds to the sum of all associated logical channels.

6. The wireless communication method according to claim 2, wherein, The COT assistance information includes parameters of one or more logical channels associated with the corresponding dedicated destination identifier (ID).

7. The wireless communication method according to claim 2, wherein, The COT assistance information includes a buffer size field and a CAPC value field. The buffer size field is used to indicate the total amount of data available on all logical channels associated with the CAPC value, and the CAPC value field is used to indicate the CAPC value of one or more logical channels with a reported sidelink buffer status.

8. The wireless communication method according to claim 1, wherein the first wireless communication device determines to send the COT assistance information when at least one of the following is satisfied: The content of the COT assistance information has changed; The sidelink data of the logical channel has become available, and the logical channel where the sidelink data is located has a higher priority compared to any other logical channel containing available sidelink data; The sidelink data of the logical channel associated with a higher - priority CAPC value has become available; The sidelink data of the logical channel associated with a lower - priority CAPC value has become available; A Listen - Before - Talk (LBT) failure has been detected; A timer has expired; The first wireless communication device has received a second message from the second wireless communication device, indicating that the second wireless communication device is capable of providing the COT; X LBT failures have been detected.

9. The wireless communication method according to claim 1, further comprising: Before sending the COT assistance information, the first wireless communication device receives a second message from the second wireless communication device, and the second message is used to indicate the sharing of the COT; Wherein, the second message is further used to indicate one or more destination IDs.

10. The wireless communication method according to claim 9, wherein, The COT assistance information includes multiple sets of parameters, and the values of the multiple sets of parameters are sequentially indexed in the same order as presented in the second message.

11. The wireless communication method according to claim 1, wherein, In the case where at least one of the following is satisfied, The second wireless communication device selects the first wireless communication device to share the COT: The CAPC value indicated in the COT auxiliary information is less than or equal to the CAPC value associated with the COT resource and the lowest CAPC value; The CAPC value indicated in the COT auxiliary information is less than or equal to the CAPC value associated with the COT resource and the highest CAPC value; The estimated arrival or cached data size in the COT auxiliary information is the largest, where the CAPC value of the data is less than or equal to the CAPC value associated with the COT resource.

12. A wireless communication method, comprising: A first wireless communication device, in response to obtaining a first sidelink grant, starts a logical channel prioritization (LCP) process for performing sidelink transmission, where the LCP process further includes: The first wireless communication device selects one destination from multiple destinations on a list; The first wireless communication device selects one or more logical channels from multiple logical channels belonging to the selected destination; Wherein, the first sidelink grant is associated with one or more channel occupancy times (COTs), and the COTs are shared by one or more second wireless communication devices with the first wireless communication device.

13. The wireless communication method according to claim 12, further comprising: The first wireless communication device identifies that the first sidelink grant is associated with a single COT, and the single COT is associated with a specified destination identifier (ID) and a specified CAPC value; The first wireless communication device selects a destination with the specified destination ID, and the destination has sidelink data that can be used for transmission and the CAPC value is less than or equal to the specified CAPC value; The first wireless communication device selects a logical channel, and the logical channel has sidelink data that can be used for transmission and the CAPC value is less than or equal to the specified CAPC value.

14. The wireless communication method according to claim 12, further comprising: The first wireless communication device identifies that the first sidelink grant is associated with a single COT, and the single COT is associated with a specified destination list and a specified CAPC value; The first wireless communication device selects the destination on the specified destination list, and the destination has sidelink data that can be used for transmission and the CAPC value is less than or equal to the specified CAPC value, where the logical channel of the selected destination has the highest priority; The first wireless communication device selects a logical channel, and the logical channel has sidelink data that can be used for transmission and the CAPC value is less than or equal to the specified CAPC value.

15. The wireless communication method according to claim 12, further comprising: The first wireless communication device identifies that the first sidelink grant is associated with at least a first COT and a second COT, where the first COT is associated with a first specified destination ID and a first specified CAPC value, and the second COT is associated with a second specified destination ID and a second specified CAPC value; The first wireless communication device selects a destination having a first or second specified destination ID, the destination having sidelink data that is available for transmission and has a CAPC less than or equal to the first or second specified CAPC value; The first wireless communication device selects a logical channel that has sidelink data that is available for transmission and has a CAPC less than or equal to the first or second specified CAPC value.

16. The wireless communication method according to claim 12, further comprising: The first wireless communication device identifies that the first sidelink grant is associated with at least a first COT and a second COT, wherein the first COT is associated with a first specified destination list and a first specified CAPC value, and the second COT is associated with a second specified destination list and a second specified CAPC value; The first wireless communication device selects the destination on the first or second specified destination list, the destination having sidelink data that is available for transmission and has a CAPC value less than or equal to the first or second specified CAPC value, wherein the logical channel of the selected destination has the highest priority; The first wireless communication device selects a logical channel that has sidelink data that is available for transmission and has a CAPC value less than or equal to the first or second specified CAPC value.

17. The wireless communication method according to claim 12, further comprising: The first wireless communication device receives a message from the second wireless communication device indicating sharing of the one or more COTs.

18. The wireless communication method according to any one of claims 13 to 17, further comprising: The first wireless communication device selects a destination that has at least one MAC CE or a logical channel with the highest priority.

19. The wireless communication method according to any one of claims 13 to 17, further comprising: The first wireless communication device determines that a type 1 listen-before-talk LBT procedure for the grant will fail; The first wireless communication device does not select a destination.

20. The wireless communication method according to any one of claims 13 to 17, further comprising: The first wireless communication device determines that a type 1 LBT procedure for the grant will succeed; The first wireless communication device selects a destination that includes a MAC CE and / or a logical channel with the highest priority.

21. The wireless communication method according to any one of claims 13 to 17, further comprising: The first wireless communication device identifies that the size of the remaining part of the first sidelink grant is less than or equal to N bytes; The first wireless communication device transmits a padding.

22. The wireless communication method according to any one of claims 13 to 17, further comprising: The first wireless communication device identifies that the size of the remaining part of the first sidelink grant is greater than or equal to N bytes, determines that a type 1 LBT procedure for the grant will fail; The first wireless communication device transmits a padding.

23. The wireless communication method according to any one of claims 13 to 17, further comprising: The first wireless communication device identifies that the size of the remaining part of the first sidelink grant is greater than or equal to N bytes; The first wireless communication device selects a logical channel without considering the CAPC value.

24. The wireless communication method according to any one of claims 13 to 17, further comprising: The first wireless communication device identifies that the size of the remaining part of the first sidelink grant is equal to or greater than N bytes to determine that the type 1 LBT procedure for the grant will succeed; The first wireless communication device selects a logical channel without considering the CAPC value.

25. The wireless communication method according to claim 12, further comprising: The first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; In response to determining that the first sidelink grant is the first of the M sidelink grants, The first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; The first wireless communication device selects a logical channel, where the logical channel has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

26. The wireless communication method according to claim 12, further comprising: The first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; The first wireless communication device determines that the first sidelink grant is not the first of the M sidelink grants, and a destination has been selected from the specified destination ID list for the previous one of the M sidelink grants; The first wireless communication device selects the destination, where the destination includes a MAC CE and / or has the highest priority logical channel.

27. The wireless communication method according to claim 12, further comprising: The first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; The first wireless communication device determines that the first sidelink grant is not the first of the M sidelink grants, and a destination has been selected from the specified destination ID list for the previous one of the M sidelink grants, and no indication of LBT failure has been received; The first wireless communication device selects a destination, where the destination includes a MAC CE and / or has the highest priority logical channel.

28. The wireless communication method according to claim 12, further comprising: The first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; The first wireless communication device determines that the first sidelink grant is not the first one among the M sidelink grants, and a destination has not been selected from the specified destination ID list for the previous one among the M sidelink grants; The first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; The first wireless communication device selects a logical channel that has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

30. The wireless communication method according to claim 12, further comprising: The first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; The first wireless communication device determines that the first sidelink grant is the last one among the M sidelink grants, and a destination has been selected from the specified destination ID list for the previous one among the M sidelink grants; The first wireless communication device selects a destination that includes a MAC CE and / or a logical channel with the highest priority.

31. The wireless communication method according to claim 12, further comprising: The first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; The first wireless communication device determines that the first sidelink grant is the last one among the M sidelink grants, and a destination has not been selected from the specified destination ID list for the previous one among the M sidelink grants; The first wireless communication device selects a destination from the specified destination ID list, where the destination has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value; The first wireless communication device selects a logical channel that has sidelink data available for transmission and a CAPC value less than or equal to the specified CAPC value.

32. The wireless communication method according to claim 12, further comprising: The first wireless communication device obtains M sidelink grants corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; The first wireless communication device determines that the first sidelink grant is the last one among the M sidelink grants, and a destination has been selected from the specified destination ID list for the previous one among the M sidelink grants, and an indication of LBT failure has not been received; The first wireless communication device selects a destination that includes a MAC CE and / or a logical channel with the highest priority.

33. The wireless communication method according to claim 12, further comprising: The first wireless communication device obtains M sidelink authorizations corresponding to the same COT, where the COT corresponds to a specified destination ID list and a specified CAPC value, and M is greater than 1; The first wireless communication device determines that the first sidelink authorization is not the last one among the M sidelink authorizations; The first wireless communication device selects a destination, where the destination includes a MAC CE and / or a logical channel with the highest priority.

33. A wireless communication method, comprising: A second wireless communication device receives a first message from a first wireless communication device, the first message including first channel occupancy time (COT) assistance information; Wherein, the second wireless communication device is capable of initiating sharing of the COT with the first wireless communication device.

34. The wireless communication method according to claim 32, further comprising: The second wireless communication device receives a third message from a third wireless communication device, the third message including second COT assistance information, The second wireless communication device selects the first wireless communication device to share the COT when at least one of the following is satisfied: The CAPC value indicated in the first COT assistance information is less than or equal to the CAPC value associated with the COT resource and the lowest CAPC value; The CAPC value indicated in the first COT assistance information is less than or equal to the CAPC value associated with the COT resource and the highest CAPC value; The estimated arrival or cached data size in the first COT assistance information is the largest, where the CAPC value of the data is less than or equal to the CAPC value associated with the COT resource.

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