Method and apparatus for sidelink channel access

Abstract

A wireless communication method for a wireless terminal is disclosed. The method includes performing a second channel access procedure for a second transmission following the first transmission by using a first channel access procedure for the first transmission.

Description

Technical Field

[0001] The present application is directed generally to wireless communications, and in particular to sidelink (SL) communications. Background Art

[0002] In order to perform transmission via the Type I channel access procedure, it is expected that the SL user equipment (UE) should follow the following Figure 1 Specifically, the counter N determines the total sensing window, i.e. the duration spanned by the sensing time slots that need to be sensed, which are idle before transmission, and is initialized to an initial value Ni.

[0003] Depending on the actual situation of the sensing process, for example due to some perceived busy time slots within a given delay duration Td, the UE may end sensing during a window longer than the window determined by Ni. Figure 1 As shown, the entire perception window is denoted as Nf.

[0004] UE-to-UE channel occupation time (COT) sharing is supported in New Radio (NR) SL in shared channels and is expected to be supported at least in dynamic channel access. Therefore, it may be necessary to specify a type 1 channel access procedure to support UE-to-UE sharing of COT. Summary of the invention

[0005] The present application relates to methods, systems and devices for SL and / or Uu interface (i.e., the wireless interface between a base station (e.g., a gNB or a radio access network (RAN) node) and a UE) transmission (including uplink and / or downlink transmission), and in particular to methods, systems and devices for the channel access process for SL or Uu interface transmission.

[0006] The present disclosure relates to a wireless communication method for a wireless terminal. The method includes: performing a second channel access procedure for a second transmission subsequent to the first transmission by using a first channel access procedure for the first transmission.

[0007] Various embodiments may preferably implement the following features:

[0008] Preferably, the value of a counter associated with the sensing time window of the first channel access procedure is decremented or remains unchanged.

[0009] Preferably, using the first channel access procedure for the second transmission comprises: using the value of a counter associated with the perception time window of the first channel access procedure to perform a second channel access procedure for the second transmission.

[0010] Preferably, the channel access procedure is a Type I channel access procedure.

[0011] Preferably, the first transmission and the second transmission carry the same transport block or different transport blocks.

[0012] Preferably, the first transmission and the second transmission are associated with the same or different hybrid automatic repeat request HARQ process identifiers.

[0013] Preferably, the first transmission and the second transmission cannot share the channel occupancy time COT.

[0014] Preferably, an interval between two consecutive time resources reserved for the first transmission and the second transmission is greater than a threshold.

[0015] Preferably, for the first transmission and the second transmission, cyclic prefix extension is disabled.

[0016] Preferably, the first transmission and the second transmission are sidelink transmissions.

[0017] Preferably, the sidelink transmission is performed over an unlicensed spectrum.

[0018] Preferably, the first transmission is one of an uplink transmission or a sidelink transmission performed on an unlicensed spectrum, and the second transmission is the other of a downlink transmission or a sidelink transmission performed on an unlicensed spectrum.

[0019] Preferably, the first priority value of the first transmission is greater than the second priority value of the second transmission.

[0020] Preferably, a priority value or priority ranking is associated with a channel access priority class.

[0021] Preferably, the prioritization between the first transmission and the second transmission is performed no earlier than a duration before initiation of the first channel access procedure or the second channel access procedure.

[0022] Preferably, the second channel access procedure for the second transmission is initiated after the first channel access procedure is initiated and / or the associated grant for the second transmission is received after the associated grant for the first transmission is received.

[0023] Preferably, a first channel access procedure for a first transmission is initiated and has not yet ended before initiation of a second channel access procedure for a second transmission.

[0024] Preferably, the wireless communication method further comprises sending COT sharing information indicating that COT sharing is unavailable to the wireless network node.

[0025] Preferably, an energy detection threshold for COT sharing is provided, and the COT sharing information indicates a row index corresponding to a parameter list associated with COT sharing, and indicates that COT sharing is not available.

[0026] Preferably, no energy detection threshold is provided for COT sharing, and the COT sharing information indicates zero.

[0027] Preferably, the channel occupancy time of the second transmission is one of the following:

[0028] a first COT determined based on a first priority value of a first transport block associated with the first transmission,

[0029] a second COT determined based on a second priority value of a second transport block associated with the second transmission, or

[0030] A third COT is determined based on a maximum priority value or a minimum priority value among a first priority value of a first transport block associated with the first transmission and a second priority value of a second transport block associated with the second transmission.

[0031] The present disclosure relates to a wireless communication method for a wireless network node. The method includes: receiving channel occupancy time (COT) sharing information indicating that COT sharing is unavailable from a wireless terminal.

[0032] Various embodiments may preferably implement the following features:

[0033] Preferably, an energy detection threshold for COT sharing is provided to the wireless terminal, and the COT sharing information indicates a row index corresponding to a parameter list associated with COT sharing, and indicates that COT sharing is not available.

[0034] Preferably, no energy detection threshold for COT sharing is provided to the wireless terminal, and the COT sharing information indicates zero.

[0035] The present disclosure relates to a wireless communication method for a wireless terminal. The method includes: performing a first channel access procedure for a first transmission, wherein after the first channel access procedure is initiated, a second channel access procedure for a second transmission subsequent to the first transmission is initiated and / or after receiving an associated grant of the first transmission, receiving an associated grant of the second transmission.

[0036] Various embodiments may preferably implement the following features:

[0037] Preferably, the channel access procedure is a Type I channel access procedure.

[0038] Preferably, the first priority value of the first transmission is lower than the second priority value of a second transmission following the first transmission.

[0039] Preferably, the priority value is associated with a channel access priority class.

[0040] Preferably, the prioritization between the first transmission and the second transmission is performed no earlier than a duration T before the initiation of the first channel access procedure or the second channel access procedure.

[0041] Preferably, the first transmission and the second transmission are associated with the same or different hybrid automatic repeat request HARQ process identifiers.

[0042] Preferably, the first transmission and the second transmission carry the same transport block or different transport blocks.

[0043] Preferably, the first transmission and the second transmission are sidelink transmissions.

[0044] Preferably, the sidelink transmission is performed over an unlicensed spectrum.

[0045] Preferably, the first transmission is one of an uplink transmission or a sidelink transmission performed on an unlicensed spectrum, and the second transmission is the other of a downlink transmission or a sidelink transmission performed on an unlicensed spectrum.

[0046] Preferably, a first channel access procedure for a first transmission is initiated and has not yet ended before initiation of a second channel access procedure for a second transmission.

[0047] Preferably, the second channel access procedure for the second transmission is terminated.

[0048] Preferably, the wireless communication method further comprises initiating a second channel access procedure for the second transmission.

[0049] The present disclosure relates to a wireless communication method for a wireless terminal. The method includes: performing a channel access procedure for a priority transmission having a lower priority value among a first transmission and a second transmission, wherein the channel access procedure is performed based on at least one channel access parameter of the priority transmission.

[0050] Various embodiments may preferably implement the following features:

[0051] Preferably, the channel access procedure is a Type I channel access procedure.

[0052] Preferably, the at least one channel access parameter comprises a priority value for priority transmission.

[0053] Preferably, the priority value is associated with a channel access priority class.

[0054] Preferably, the first transmission is one of an uplink transmission or a sidelink transmission performed on an unlicensed spectrum, and the second transmission is the other of a downlink transmission or a sidelink transmission performed on an unlicensed spectrum.

[0055] Preferably, the first transmission and the second transmission are sidelink transmissions.

[0056] Preferably, the sidelink transmission is performed over an unlicensed spectrum.

[0057] Preferably, the channel access procedure for the first transmission is initiated and has not yet ended before the initiation of the channel access procedure for the second transmission.

[0058] The present disclosure relates to a wireless terminal. The wireless terminal comprises:

[0059] communication unit, and

[0060] A processor is configured to perform a second channel access procedure for a second transmission subsequent to the first transmission by using the first channel access procedure for the first transmission.

[0061] Various embodiments may preferably implement the following features:

[0062] Preferably, the processor is further configured to execute any one of the aforementioned wireless communication methods.

[0063] The present disclosure relates to a wireless network node. The wireless network node includes a communication unit configured to receive channel occupancy time (COT) sharing information indicating that COT sharing is unavailable from a wireless terminal.

[0064] Various embodiments may preferably implement the following features:

[0065] Preferably, the wireless network node further comprises a processor, and the processor is configured to execute any one of the aforementioned wireless communication methods.

[0066] The present disclosure relates to a wireless terminal. The wireless terminal comprises:

[0067] communication unit, and

[0068] A processor configured to perform a first channel access procedure for a first transmission, wherein after the first channel access procedure is initiated, a second channel access procedure for a second transmission subsequent to the first transmission is initiated, and / or after receiving an associated authorization for the first transmission, an associated authorization for the second transmission is received.

[0069] Various embodiments may preferably implement the following features:

[0070] Preferably, the processor is further configured to execute any one of the aforementioned wireless communication methods.

[0071] The present disclosure relates to a wireless terminal, the wireless terminal comprising:

[0072] communication unit, and

[0073] A processor is configured to perform a channel access procedure for a priority transmission having a lower priority value among the first transmission and the second transmission, wherein the channel access procedure is performed based on at least one channel access parameter of the priority transmission.

[0074] Various embodiments may preferably implement the following features:

[0075] Preferably, the processor is further configured to execute any one of the aforementioned wireless communication methods.

[0076] The present disclosure relates to a computer program product, which includes a computer-readable program medium code stored thereon, and when the code is executed by a processor, the processor implements the wireless communication method described in any one of the aforementioned methods.

[0077] The exemplary embodiments disclosed herein are intended to provide features that will become apparent by reference to the following description when taken in conjunction with the accompanying drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who have read this disclosure that various modifications may be made to the disclosed embodiments while remaining within the scope of this disclosure.

[0078] Therefore, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. In addition, the specific order and / or hierarchy of the steps in the methods disclosed herein are merely exemplary approaches. Based on design preferences, the specific order or hierarchy of the steps of the disclosed methods or processes can be rearranged while still remaining within the scope of the present disclosure. Therefore, it should be understood by those of ordinary skill in the art that the methods and techniques disclosed herein present various steps or actions in a sample order, and unless otherwise expressly stated, the present disclosure is not limited to the specific order or hierarchy presented.

[0079] The above and other aspects and embodiments thereof will be described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 A schematic diagram of the perception window is shown.

[0081] Figure 2 A schematic diagram of a network (architecture) according to an embodiment of the present disclosure is shown.

[0082] Figure 3 An example of a schematic diagram of a wireless terminal according to an embodiment of the present disclosure is shown.

[0083] Figure 4 An example of a schematic diagram of a wireless network node according to an embodiment of the present disclosure is shown.

[0084] Figures 5 to 8 A flow chart of a method according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0085] Figure 2 A schematic diagram of a network (architecture) according to an embodiment of the present disclosure is shown. Figure 1 The network shown includes a base station (BS), a relay (node) (e.g., a group head UE), and two UEs (UE1 and UE2). For example, UE1 may be a mobile phone, and UE2 may be a smart gadget (e.g., smart glasses). As an alternative, UE1 and / or UE2 may be Internet of Things (IoT) devices. UE1 and / or UE2 may communicate with the BS directly or via a relay. Based on the SL scheduling received from the BS, the relay, UE1, and UE2 may communicate with each other, wherein the communication between each two of the relay, UE1, and UE2 is referred to as SL communication. The SL communication may be in the form of unicast, multicast, or broadcast. In addition, UE2 may communicate with the BS / relay via UE1. That is, UE1 may act as a UE / mobile relay.

[0086] For SL operation on unlicensed spectrum, a single SL Control Information (SCI) Format 1-A is expected to reserve time and frequency resources for up to MaxNumPerReserve physical SL shared channel (PSSCH) transmissions, where MaxNumPerReserve is a value up to 3. MaxNumPerReserve PSSCH transmissions can be associated with the same hybrid automatic repeat request (HARQ) process identifier and / or carry the same transport block (TB). It should be noted that MaxNumPerReserve can vary depending on different situations. When a Type I channel access procedure is initiated for a first PSSCH transmission opportunity and the reserved resources are not equipped with a cyclic prefix extension (CPE) and / or are not back-to-back in time, subsequent / subsequent PSSCH transmission opportunities cannot share the COT initiated by the Type I channel access procedure initiated for the first PSSCH transmission opportunity. It should be noted that in the present disclosure, non-back-to-back (in time) (time / frequency) resources refer to the interval between two consecutive resources being greater than a threshold (e.g., 16 or 25 microseconds). In this case, it may be necessary to specify a dedicated (Type I) channel access procedure for a given subsequent PSSCH transmission. Therefore, relevant rules and mechanisms need to be specified to ensure the successful transmission of the MaxNumPerReserve PSSCH.

[0087] Furthermore, relevant rules and mechanisms may need to be specified to ensure successful PSSCH transmission of (different) TBs that may occupy different HARQ processes.

[0088] In one embodiment, NR transmissions and SL transmissions on unlicensed spectrum may be authorized to overlap in time, and one or both of the NR and SL transmissions require a Type I channel access procedure. That is, relevant rules or mechanisms need to be specified for, for example, a case where one of the uplink (UL) and SL transmissions occurs based on the priority ranking of the transmissions, and another case where both UL and SL transmissions occur regardless of the priority of each transmission. It should be noted that the rules and mechanisms in the relevant embodiments need to avoid affecting other NR unlicensed (NR-U) operations, such as NR-U downlink (DL) operations.

[0089] In some embodiments, PSSCH transmissions associated with the same HARQ process identifier and / or carrying the same TB cannot share the same COT. For example, the transmission resources reserved by SCI (format) 1-A are not back-to-back and / or the CPE is not enabled or disabled. In this embodiment, subsequent (PSSCH) transmissions of previous (PSSCH) transmissions associated with the same HARQ process identifier and / or carrying the same transport block (and / or reserved in the same SCI 1-A) can perform a Type I channel access procedure in the following manner:

[0090] - For previous (PSSCH) transmissions that are retained in the same SCI 1-A, use the ongoing / existing Type I channel access procedure.

[0091] In one embodiment, using an ongoing / existing type I channel access procedure refers to decrementing a counter N (associated with a sensing time window) from the Nc value of the ongoing / existing type I channel access procedure, rather than initiating the counter N from an initial value Ni. For example, the UE may initiate a (type I) channel access procedure for a transmission and start the counter N from the initial value Ni. Based on the sensing result in each delay duration Td, when the UE (needs to) initiate another (type I) channel access procedure for a subsequent transmission, the value of the counter N may be decremented to the (ongoing) and / or maintained as the (existing) Nc value. In this example, the UE may initiate a channel access procedure for a subsequent transmission by initiating the counter N from the Nc value (i.e., using the ongoing / existing (type I) channel access procedure).

[0092] In one embodiment, the ongoing type I channel access procedure indicates that the value of the counter N in the type I channel access procedure is still decreasing (eg, the counter N is still counting).

[0093] In one embodiment, the existing type I channel access procedure means that the value of the counter N in the type I channel access procedure remains unchanged (eg, the counter N stops counting).

[0094] In some embodiments, for a type I channel access procedure preceding a TB transmission that may occupy different HARQ processes (e.g., with the same or different HARQ identifiers), the type I channel access procedure for transmission of the first TB may:

[0095] - if the priority value of the transmission of the first TB is equal to or less than the priority value of the transmission of the second TB, then use the ongoing / existing Type I channel access procedure for another second TB, and / or

[0096] - if the transmission of the first TB is greater than the priority value of the transmission of the second TB, a new Type I channel access procedure is initiated and the ongoing / existing Type I channel access procedure is not terminated for the transmission of another second TB, provided that these transmissions are very independent of each other, and / or

[0097] - Initiate a new Type I channel access procedure.

[0098] It should be noted that the priority value may be a channel access priority class or a value associated with a channel access priority class. In the present disclosure, a transmission has a higher priority if it has a smaller priority value. In other words, if a first priority value of a first transmission is less than a second priority value of a second transmission, then the first transmission takes precedence over the second transmission, or the first transmission has a higher priority than the second transmission.

[0099] For the aforementioned embodiments, a channel access procedure for transmission of the second TB is initiated before a channel access procedure for transmission of the first TB is initiated, and / or an associated authorization for transmission of the second TB is received before an associated authorization for transmission of the first TB is received. Prioritization between transmission of the first TB and transmission of the second TB is performed / determined no earlier than a duration before initiation of the first channel access procedure or the second channel access procedure.

[0100] In some embodiments, NR transmissions (e.g., UL transmissions) and SL transmissions (on unlicensed spectrum) may overlap in time, and both the NR transmissions and the SL transmissions need to perform a Type I channel access procedure. In this case, the Type I channel access procedure for one of the NR transmission and the SL transmission may not be completed before initiating the Type I channel access procedure for one of the NR transmission and the SL transmission. In these embodiments, it can be assumed that the Type I channel access procedure occurs when the priority sorting procedure for determining priority transmission from the NR transmission and the SL transmission is performed after or before the Type I channel access procedure for any one of the NR transmission and the SL transmission for a duration of at least T, so that there is insufficient time to determine the priority transmission from the NR transmission or the SL transmission.

[0101] In one embodiment, when both NR transmissions and SL transmissions (performed on unlicensed spectrum) require a Type I channel access procedure, only one of the SL transmission or the NR transmission is determined to be transmitted as a result of certain prioritization rules:

[0102] - if a (UL or SL) transmission whose channel access procedure was initiated later in time or whose associated grant was received later in time is prioritized and is to be transmitted, then the Type I channel access procedure for the prioritized transmission shall use the ongoing / existing Type I channel access procedure of the previous (SL or UL) transmission in time, and / or

[0103] - if a (UL or SL) transmission whose channel access procedure was initiated earlier in time or whose associated grant was received earlier in time is prioritized, the Type I channel access procedure for the prioritized transmission is maintained until the final transmission of the prioritized transmission, and / or

[0104] -If a (UL or SL) transmission whose channel access procedure is initiated earlier in time or whose associated authorization is received earlier in time is prioritized, the Type I channel access procedure for the prioritized transmission is maintained until the final transmission of the prioritized transmission, and the Type I channel access procedure for the (UL or SL) transmission whose channel access procedure is initiated later in time or whose associated authorization is received later in time is terminated.

[0105] In one embodiment, assuming that a priority sorting is performed at least within a duration of T (e.g., 4ms, 5ms, 6ms) before a channel access procedure of at least one of SL or UL transmission (e.g., one or both), a Type I channel access procedure occurs, so that there is enough time to determine the priority transmission between SL transmission and UL transmission, and the need to perform its Type I channel access procedure. In this embodiment, when only one of SL transmission and UL transmission is transmitted, the relevant Type I channel access procedure can be performed after determining the priority transmission:

[0106] – The Type I channel access procedure follows the parameters of the priority transmission between SL transmission and UL transmission.

[0107] In one embodiment, regardless of the priority of each transmission, UL transmission and SL transmission will occur (e.g., in the same time slot). In this embodiment, the type I channel access procedure can be performed according to at least one of the following:

[0108] - if the priority value of the later-in-time transmission among the UL transmission and the SL transmission is equal to or less than the priority value of the earlier-in-time transmission, the later transmission uses the ongoing / existing Type I channel access procedure corresponding to the earlier-in-time transmission, and / or

[0109] -A transmission that is later in time among the UL transmission and the SL transmission uses an ongoing / existing Type I channel access procedure to initiate a new Type I channel access procedure for the earlier transmission among the UL transmission and the SL transmission, and if the priority value of the transmission that is later in time is greater than the priority value of the transmission that is earlier in time (assuming that the transmissions are completely independent of each other), the ongoing / existing Type I channel access procedure is not terminated (i.e., is maintained).

[0110] In one embodiment, a transmission that is later in time than another transmission refers to / includes at least one of the following:

[0111] - a transmission is later in time than another transmission,

[0112] - a channel access procedure for a transmission is initiated later in time than a channel access procedure for another transmission, or

[0113] - The associated grant of the transmission is received later in time than the associated grant of the other transmission.

[0114] In some embodiments of transmission using an ongoing / existing Type I channel access procedure for another transmission, the UE may indicate to the BS via UL Control Information (UCI) that COT is not available. Depending on whether the higher layer parameter ul-toDL-COT-SharingED-Tehreshold-r16 is provided, the following indication rules need to be specified:

[0115] -If the higher layer parameter ul-toDL-COT-SharingED-Tehreshold-r16 is provided, the UE is configured by the higher layer parameter cg-COT-SharingList-r16, where the higher layer parameter cg-COT-ShareList-r16 provides a table configured by the higher layer. Each row of the table provides channel occupancy sharing information given by the higher layer parameter CG-COT-Share-r16. One row of the table is configured to indicate that channel occupancy sharing is not available. For example, the "COT sharing information" in the CG-UCI detected in time slot n may indicate a row index corresponding to the higher layer parameter CG-COT-Share-r16, indicating that channel occupancy sharing is not available.

[0116] - If the higher layer parameter ul-toDL-COT-SharingED-Tehreshold-r16 is not provided, the "COT sharing information" in the CG-UCI indicates "0".

[0117] It should be noted that the higher layer parameter ul-to-DL-COT-SharingED-Tehreshold-r16 is associated with the energy detection threshold for COT sharing. For example, the provision of the higher layer parameter ul-to-DL-COT-SharingED-Tehreshold-r16 means that the energy detection threshold for COT sharing is provided. The failure to provide the higher layer parameter ul-to-DL-COT-SharingED-Tehreshold-r16 means that the energy detection threshold for COT sharing is not provided.

[0118] In some embodiments, when a Type I channel access procedure for transmission of a TB uses an ongoing / existing Type I channel access procedure, the (remaining) channel occupancy time shall be at least one of the following:

[0119] -Channel occupancy time determined by the priority of the TB itself,

[0120] - the channel occupancy time determined by the TB whose ongoing / existing Type I channel access procedure is being used, or

[0121] - The channel occupancy time determined by the maximum or minimum value of the TB used by the TB itself or its ongoing / existing Type I channel access procedures.

[0122] It should be noted that the above-mentioned priority (value) can be a priority value of a TB or a channel value priority category value.

[0123] Figure 3 A schematic diagram of a wireless terminal 30 according to an embodiment of the present disclosure is provided. The wireless terminal 30 may be a user equipment (UE), a mobile phone, a laptop, a tablet computer, an e-book, or a portable computer system, and is not limited thereto. The wireless terminal 30 may include a processor 300 such as a microprocessor or an application-specific integrated circuit (ASIC), a storage unit 310, and a communication unit 320. The storage unit 310 may be any data storage device that stores program code 312 accessed and executed by the processor 300. Embodiments of the storage unit 310 include, but are not limited to, a subscriber identity module (SIM), a read-only memory (ROM), a flash memory, a random access memory (RAM), a hard disk, and an optical data storage device. The communication unit 320 may be a transceiver and is used to send and receive signals (e.g., messages or data packets) based on the processing results of the processor 300. In one embodiment, the communication unit 320 communicates with the communication unit 320 via Figure 3 At least one antenna 322 is shown for transmitting and receiving signals.

[0124] In one embodiment, the storage unit 310 and the program code 312 may be omitted, and the processor 300 may include the storage unit with the stored program code.

[0125] The processor 300 may implement any one of the steps of the exemplary embodiments on the wireless terminal 30 , for example, by executing the program code 312 .

[0126] The communication unit 320 may be a transceiver. Alternatively or additionally, the communication unit 320 may combine a transmitting unit and a receiving unit configured to transmit and receive signals to and from a wireless network node (eg, a base station), respectively.

[0127] Figure 4A schematic diagram of a radio network node 40 according to an embodiment of the present disclosure is provided. The radio network node 40 may be a satellite, a base station (BS), a network entity, a mobility management entity (MME), a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), a radio access network (RAN) node, a next generation RAN (NG-RAN) node, a gNB, an eNB, a gNB centralized unit (gNB-CU), a gNB distributed unit (gNB-DU), a data network, a core network or a radio network controller (RNC) and is not limited thereto. In addition, the radio network node 40 may include (execute) at least one network function such as an access and mobility management function (AMF), a session management function (SMF), a user location function (UPF), a policy control function (PCF), an application function (AF), etc. The radio network node 40 may include a processor 400 such as a microprocessor or an ASIC, a storage unit 410, and a communication unit 420. The storage unit 410 may be any data storage device that stores a program code 412 accessed and executed by the processor 400. Examples of the storage unit 410 include, but are not limited to, a SIM, a ROM, a flash memory, a RAM, a hard disk, and an optical data storage device. The communication unit 420 may be a transceiver and is used to send and receive signals (e.g., messages or data packets) according to the processing results of the processor 400. In one example, the communication unit 420 communicates with the processor 400 via Figure 4 At least one antenna 422 is shown for transmitting and receiving signals.

[0128] In one embodiment, storage unit 410 and program code 412 may be omitted. Processor 400 may include a storage unit with stored program code.

[0129] The processor 400 may implement any of the steps described in the exemplary embodiments on the radio network node 40 , for example, by executing the program code 412 .

[0130] The communication unit 420 may be a transceiver. Alternatively or additionally, the communication unit 420 may combine a transmitting unit and a receiving unit configured to transmit and receive signals to and from a wireless terminal (eg, a user equipment or another wireless network node), respectively.

[0131] Figure 5 A flow chart of a method according to an embodiment of the present disclosure is shown. Figure 5 The method shown may be used in a wireless terminal (e.g., UE) and includes the following steps:

[0132] Step 501: By using the first channel access procedure for the first transmission, a second channel access procedure for the second transmission following the first transmission is performed.

[0133] exist Figure 5 In the embodiment, the second transmission is (configured to be) after the first transmission, and the second channel access procedure for the second transmission is performed by using the first channel access procedure for the first transmission. Specifically, the wireless terminal may need to perform the first channel access procedure for the first transmission, and perform the second channel access procedure for the second transmission, which is after the first transmission (configured to be initiated after the first transmission). In this case, the first channel access procedure may not end before the second channel access procedure is initiated. In this embodiment, the wireless terminal performs the second channel access procedure by using the first channel access procedure to ensure that the second transmission can be successfully performed.

[0134] In one embodiment, the value of the counter associated with the sensing time window of the first channel access process is decreasing or remains unchanged. This means that the first channel access process is still in progress or exists or has not yet ended.

[0135] In one embodiment, using the first channel access procedure for the second transmission refers to using the value of the counter associated with the perception time window of the first channel access procedure to perform the second channel access procedure for the second transmission. For example, the wireless terminal may use the value of the counter of the ongoing / existing first channel access procedure as the initial value of the counter associated with the perception time window of the second channel access procedure.

[0136] In one embodiment, the first channel access procedure / the second channel access procedure is a Type I channel access procedure.

[0137] In one embodiment, the first transmission and the second transmission carry the same TB or different TBs.

[0138] In one embodiment, the first transmission and the second transmission are associated with the same or different HARQ process identification (ID).

[0139] In one embodiment, the first transmission and the second transmission cannot share a COT.

[0140] In one embodiment, an interval between two consecutive time resources reserved for the first transmission and the second transmission is greater than a threshold, and / or the CPE is disabled for the first transmission and the second transmission.

[0141] In one embodiment, the first transmission and the second transmission are SL transmissions. Note that SL transmissions may be performed on unlicensed spectrum.

[0142] In one embodiment, the first transmission is one of a UL transmission or a SL transmission performed on an unlicensed spectrum, and the second transmission is the other of the UL transmission or the SL transmission performed on the unlicensed spectrum.

[0143] In one embodiment, the first priority value of the first transmission is greater than the second priority value of the second transmission. It should be noted that in the present disclosure, a larger priority value refers to a lower priority. In other words, in this embodiment, the priority of the first transmission is lower than the priority of the second transmission.

[0144] In one embodiment, the priority sorting (procedure) between the first transmission and the second transmission is performed no earlier than the duration before the initiation of the first channel access procedure or the second channel access procedure. In this embodiment, the wireless terminal does not confirm the priority sequence of the first transmission and the second transmission before initiating the first channel access procedure or the second channel access procedure.

[0145] In one embodiment, the priority value is associated with a channel access priority class.

[0146] In one embodiment, the second channel access procedure for the second transmission is (configured to be) initiated after the first channel access procedure is initiated.

[0147] In one embodiment, the wireless terminal receives a grant associated with a second transmission after receiving a grant associated with a first transmission.

[0148] In one embodiment, a first channel access procedure for a first transmission is initiated and has not yet ended before initiation of a second channel access procedure for a second transmission.

[0149] In one embodiment, the wireless terminal sends COT sharing information indicating that COT sharing is unavailable to the radio network node. The COT sharing information may be transmitted in the UCI.

[0150] In one embodiment, an energy detection threshold for COT sharing (e.g., a high-level parameter ul-to-DL-COT-SharingED-Tehreshold-r16) is provided to the wireless terminal. In this embodiment, the COT sharing information indicates a row index corresponding to a parameter list associated with COT sharing and indicates that COT sharing is not available.

[0151] In one embodiment, no energy detection threshold for COT sharing (eg, higher layer parameter ul-to-DL-COT-SharingED-Tehreshold-r16) is provided to the wireless terminal. In this embodiment, the COT sharing information indicates a bit (value) of "0".

[0152] In one embodiment, the (remaining) COT of the second transmission is a first COT determined based on a first priority value of a first transmission block associated with the first transmission.

[0153] In one embodiment, the (remaining) COT of the second transmission is a second COT determined based on a second priority value of a second transport block associated with the second transmission.

[0154] In one embodiment, the (remaining) COT of the second transmission is a third COT determined based on the first priority value of the first transmission block associated with the first transmission and the maximum priority value or the minimum priority value within the second priority value of the second transmission block associated with the second transmission.

[0155] Figure 6 A flow chart of a method according to an embodiment of the present disclosure is shown. Figure 6 The method shown may be used in a wireless network node and comprises the following steps:

[0156] Step 601: Receive COT sharing information indicating that COT sharing is unavailable from a wireless terminal.

[0157] In this embodiment, the radio network node receives COT sharing information from a wireless terminal (eg, UE). The received COT sharing information indicates that COT sharing is not available for transmission from the wireless terminal.

[0158] In one embodiment, an energy detection threshold for COT sharing is provided to the wireless terminal.In this embodiment, the COT sharing information indicates a row index corresponding to a parameter list associated with COT sharing, and indicates that COT sharing is not available.

[0159] In one embodiment, no energy detection threshold for COT sharing is provided to the wireless terminal. In this embodiment, the COT sharing information indicates a bit (value) "0".

[0160] Figure 7 A flow chart of a method according to an embodiment of the present disclosure is shown.

[0161] Step 701: Execute a first channel access process for a first transmission, wherein, after the first channel access process is initiated, a second channel access process for a second transmission following the first transmission is initiated, and / or after receiving an associated authorization for the first transmission, an associated authorization for the second transmission is received.

[0162] exist Figure 7In the embodiment, the wireless terminal performs a first channel access procedure for a first transmission. In this embodiment, a second channel access procedure for a second transmission after the first transmission is (configured to be) initiated after the initiation of the first channel access procedure or after the first channel access procedure is initiated. As an alternative or supplement, after receiving the associated authorization of the first transmission, the associated authorization of the second transmission is received. In this embodiment, the first channel access procedure is maintained or kept running, or is not terminated.

[0163] In one embodiment, the channel access procedure is a Type I channel access procedure.

[0164] In one embodiment, the first priority value of a first transmission is lower than the second priority value of a second transmission following the first transmission. That is, the first transmission takes precedence over or has a higher priority than the second transmission.

[0165] In one embodiment, the priority value is associated with a channel access priority class.

[0166] In one embodiment, prioritization between the first transmission and the second transmission is performed no earlier than a duration T before initiation of the first channel access procedure or the second channel access procedure.

[0167] In one embodiment, the first transmission and the second transmission are associated with the same or different HARQ process IDs.

[0168] In one embodiment, the first transmission and the second transmission carry the same transport block or different transport blocks.

[0169] In one embodiment, the first transmission and the second transmission are SL transmissions (performed on an unlicensed spectrum).

[0170] In one embodiment, the first transmission is one of a UL transmission or a SL transmission performed on an unlicensed spectrum, and the second transmission is the other of the UL transmission or the SL transmission performed on the unlicensed spectrum.

[0171] In one embodiment, a first channel access procedure for a first transmission is initiated and has not yet ended before initiation of a second channel access procedure for a second transmission.

[0172] In one embodiment, the second channel access procedure for the second transmission is terminated.

[0173] In one embodiment, the wireless terminal initiates a second channel access procedure for the second transmission, that is, the second channel access procedure is not terminated.

[0174] Figure 8 A flow chart of a method according to an embodiment of the present disclosure is shown. Figure 8 The method shown may be used in a wireless terminal (e.g., UE) and includes the following steps:

[0175] Step 801: Perform a channel access process on a priority transmission having a lower priority value between a first transmission and a second transmission, wherein the channel access process is performed based on at least one channel access parameter of the priority transmission.

[0176] exist Figure 8 In the illustrated embodiment, the wireless terminal performs a channel access procedure for a priority transmission having a lower priority value within the first transmission and the second transmission. It should be noted that having a lower priority value means having a higher priority. In this embodiment, the channel access procedure is performed based on at least one channel access parameter of the priority transmission.

[0177] In one embodiment, the channel access procedure is a Type I channel access procedure.

[0178] In one embodiment, the priority value is associated with a channel access priority class.

[0179] In one embodiment, the at least one channel access parameter is / comprises a priority value for prioritized transmission.

[0180] In one embodiment, the first transmission is one of a UL transmission or a SL transmission performed on an unlicensed spectrum, and the second transmission is the other of the UL transmission or the SL transmission performed on the unlicensed spectrum.

[0181] In one embodiment, the first transmission and the second transmission are SL transmissions (performed on an unlicensed spectrum).

[0182] In one embodiment, a channel access procedure for a first transmission is initiated and has not yet ended before the initiation of a channel access procedure for a second transmission. In this embodiment, if the second transmission has a higher priority than the first transmission, the channel access procedure for the first transmission may be terminated or used by / for the second transmission.

[0183] Although various embodiments of the present disclosure have been described above, it should be understood that they are presented only by way of example and not by way of limitation. Similarly, various figures may depict example architectures or configurations, which are provided to enable those of ordinary skill in the art to understand the exemplary features and functions of the present disclosure. However, these personnel should understand that the present disclosure is not limited to the example architectures or configurations shown, but can be implemented using a variety of alternative architectures and configurations. In addition, as those of ordinary skill in the art should understand, one or more features of an embodiment can be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of the present disclosure should not be limited by any of the exemplary embodiments described above.

[0184] It should also be understood that any reference to an element using names such as "first," "second," etc., herein generally does not limit the number or order of these elements. Instead, these names may be used herein as a convenient means of distinguishing two or more elements or instances of an element. Thus, reference to a first element and a second element does not mean that only two elements can be used, or that the first element must precede the second element in some way.

[0185] In addition, it should be understood by those skilled in the art that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols that can be referenced in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0186] Those skilled in the art should also understand that any of the various illustrative logical blocks, units, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein may be implemented via electronic hardware (e.g., digital implementations, analog implementations, or a combination of both), firmware, various forms of programs or design codes containing instructions (for convenience, may be referred to herein as "software" or "software units"), or any combination of these technologies.

[0187] In order to clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, units, circuits and steps have been generally described above with respect to their functionality. Whether such functions are implemented as hardware, firmware, or as software, or as a combination of these technologies, depends on the specific application and the design constraints imposed on the entire system. Those skilled in the art can implement the described functions in various ways for each specific application, but such implementation decisions will not lead to deviations from the scope of the present disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, units, etc. may be configured to perform one or more functions described herein. The terms "configured to" or "configured for" used herein with respect to a specified operation or function refer to a processor, device, component, circuit, structure, machine, unit, etc. that is physically constructed, programmed and / or arranged to perform a specified operation or function.

[0188] In addition, the technician should understand that the various illustrative logic blocks, units, devices, components and circuits described herein can be implemented in or performed by an integrated circuit (IC), which can include 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 device, or any combination thereof. The logic blocks, units and circuits may also 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 in an alternative, 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, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or any other suitable configuration for performing the functions described herein. If implemented in software, the function can be stored as one or more instructions or codes on a computer-readable medium. Therefore, the steps of the method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium.

[0189] Computer-readable media include computer storage media and communication media, which include any media that enable a computer program or code to be transferred from one place to another. Storage media can be any available media that can be accessed 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, or any other media that can be used to store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0190] In this application, the term "unit" used herein refers to software, firmware, hardware, and any combination of these elements for performing the relevant functions described herein. In addition, for ease of discussion, various units are described as discrete units; however, it is obvious to those of ordinary skill in the art that two or more units can be combined to form a single unit that performs the relevant functions according to the embodiments of the present disclosure.

[0191] In addition, memory or other memory and communication components may be used in the embodiments of the present disclosure. It should be understood that, for the sake of clarity, the above description has described the embodiments of the present disclosure with reference to different functional units and processors. However, it should be apparent that any appropriate functional distribution may be used between different functional units, processing logic elements or domains without departing from the present disclosure. For example, functions shown as being performed by different processing logic elements or controllers may be performed by the same processing logic element or controller. Therefore, reference to a specific functional unit is only a reference to an appropriate means for providing the described functions, rather than an indication of a strict logical or physical structure or organization.

[0192] Various modifications to the embodiments described in this disclosure should be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of the claims. Therefore, the present disclosure is not intended to be limited to the embodiments shown herein, but is to be given the widest scope consistent with the novel features and principles disclosed herein, as described in the claims.

Claims

1. A wireless communication method for a wireless terminal, the method comprising: By using the first channel access procedure for the first transmission, a second channel access procedure for a second transmission subsequent to the first transmission is performed.

2. The wireless communication method according to claim 1, wherein: The value of a counter associated with the perception time window of the first channel access procedure is decreasing or remains unchanged.

3. The wireless communication method according to claim 1 or 2, wherein: Using the first channel access process to perform a second transmission includes: A second channel access procedure for the second transmission is performed using the value of the counter associated with the perception time window of the first channel access procedure.

4. The wireless communication method according to any one of claims 1 to 3, wherein: The channel access procedure is a type I channel access procedure.

5. The wireless communication method according to any one of claims 1 to 4, wherein: The first transmission and the second transmission carry the same transport block or different transport blocks.

6. The wireless communication method according to any one of claims 1 to 5, wherein: The first transmission and the second transmission are associated with the same or different hybrid automatic repeat request HARQ process identifiers.

7. The wireless communication method according to any one of claims 1 to 6, wherein: The first transmission and the second transmission cannot share a channel occupation time COT, and / or The interval between two consecutive time resources reserved for the first transmission and the second transmission is greater than a threshold, and / or For the first transmission and the second transmission, cyclic prefix extension is disabled.

8. The wireless communication method according to any one of claims 1 to 7, wherein: The first transmission and the second transmission are sidelink transmissions.

9. The wireless communication method according to any one of claims 1 to 7, wherein: The first transmission is one of an uplink transmission or a sidelink transmission on an unlicensed spectrum, and the second transmission is the other of a downlink transmission or a sidelink transmission on the unlicensed spectrum.

10. The wireless communication method according to any one of claims 1 to 9, wherein: The first priority value of the first transmission is greater than the second priority value of the second transmission.

11. The wireless communication method according to claim 10, wherein: The priority value is associated with a channel access priority class.

12. The wireless communication method according to any one of claims 1 to 11, wherein: Prioritization between the first transmission and the second transmission is performed no earlier than a duration prior to initiation of the first channel access procedure or the second channel access procedure.

13. The wireless communication method according to any one of claims 1 to 12, wherein: The second channel access procedure for the second transmission is initiated after the first channel access procedure is initiated and / or the associated grant for the second transmission is received after the associated grant for the first transmission is received.

14. The wireless communication method according to any one of claims 1 to 13, wherein: A first channel access procedure for the first transmission is initiated and has not yet ended before initiation of a second channel access procedure for the second transmission.

15. The wireless communication method according to any one of claims 1 to 14, further comprising: COT sharing information indicating that COT sharing is unavailable is sent to the wireless network node.

16. The wireless communication method according to claim 15, wherein: An energy detection threshold for COT sharing is provided, and The COT sharing information indicates a row index corresponding to a parameter list associated with the COT sharing, and indicates that the COT sharing is unavailable.

17. The wireless communication method according to claim 15 or 16, wherein: No energy detection threshold is provided for COT sharing, and Among them, the COT sharing information indication is 0.

18. The wireless communication method according to any one of claims 1 to 17, wherein: The channel occupancy time of the second transmission is one of the following: a first COT determined based on a first priority value of a first transport block associated with the first transmission, a second COT determined based on a second priority value of a second transport block associated with the second transmission, or A third COT is determined based on a maximum priority value or a minimum priority value among a first priority value of a first transport block associated with the first transmission and a second priority value of a second transport block associated with the second transmission.

19. A wireless communication method for a wireless network node, the method comprising: Channel occupancy time (COT) sharing information is received from a wireless terminal indicating that COT sharing is unavailable.

20. The wireless communication method according to claim 19, wherein: providing an energy detection threshold for COT sharing to the wireless terminal, and The COT sharing information indicates a row index corresponding to a parameter list associated with the COT sharing, and indicates that the COT sharing is unavailable.

21. The wireless communication method according to claim 19 or 20, wherein: No energy detection threshold for COT sharing is provided to the wireless terminal, and Among them, the COT sharing information indication is 0.

22. A wireless communication method for a wireless terminal, the method comprising: performing a first channel access procedure for a first transmission, Wherein, after the first channel access procedure is initiated, a second channel access procedure for a second transmission subsequent to the first transmission is initiated, and / or after the associated authorization of the first transmission is received, the associated authorization of the second transmission is received.

23. The wireless communication method according to claim 22, wherein: The channel access procedure is a type I channel access procedure.

24. The wireless communication method according to claim 22 or 23, wherein: The first priority value of the first transmission is lower than the second priority value of the second transmission subsequent to the first transmission.

25. The wireless communication method according to claim 24, wherein: The priority value is associated with a channel access priority class.

26. The wireless communication method according to claims 22 to 25, wherein: Prioritization between the first transmission and the second transmission is performed no earlier than a duration T before initiation of the first channel access procedure or the second channel access procedure.

27. The wireless communication method according to any one of claims 22 to 26, wherein: The first transmission and the second transmission are associated with the same or different hybrid automatic repeat request HARQ process identifiers.

28. The wireless communication method according to any one of claims 22 to 27, wherein: The first transmission and the second transmission carry the same transport block or different transport blocks.

29. The wireless communication method according to any one of claims 22 to 28, wherein: The first transmission and the second transmission are sidelink transmissions.

30. The wireless communication method according to any one of claims 22 to 29, wherein: The first transmission is one of an uplink transmission or a sidelink transmission performed on an unlicensed spectrum, and the second transmission is the other of a downlink transmission or a sidelink transmission performed on the unlicensed spectrum.

31. The wireless communication method according to any one of claims 22 to 30, wherein: A first channel access procedure for the first transmission is initiated and has not yet ended before initiation of a second channel access procedure for the second transmission.

32. The wireless communication method according to any one of claims 22 to 31, wherein: The second channel access procedure for the second transmission is terminated.

33. The wireless communication method according to any one of claims 22 to 31, further comprising: A second channel access procedure for the second transmission is initiated.

34. A wireless communication method for a wireless terminal, the method comprising: performing a channel access procedure for a priority transmission having a lower priority value within the first transmission and the second transmission, The channel access process is performed based on at least one channel access parameter of the priority transmission.

35. The wireless communication method according to claim 34, wherein: The channel access procedure is a type I channel access procedure.

36. The wireless communication method according to claim 34 or 35, wherein: The at least one channel access parameter comprises a priority value for the priority transmission.

37. The wireless communication method according to any one of claims 34 to 36, wherein: The priority value is associated with a channel access priority class.

38. The wireless communication method according to any one of claims 34 to 37, wherein: The first transmission is one of an uplink transmission or a sidelink transmission on an unlicensed spectrum, and the second transmission is the other of a downlink transmission or a sidelink transmission on the unlicensed spectrum.

39. The wireless communication method according to any one of claims 34 to 37, wherein: The first transmission and the second transmission are sidelink transmissions.

40. The wireless communication method according to any one of claims 34 to 39, wherein: The channel access procedure for the first transmission is initiated and has not yet ended before the initiation of the channel access procedure for the second transmission.

41. A wireless terminal, comprising: communication unit, and A processor is configured to perform a second channel access procedure for a second transmission subsequent to the first transmission by using the first channel access procedure for the first transmission.

42. The wireless terminal according to claim 41, wherein: The processor is further configured to perform the wireless communication method according to any one of claims 2 to 18.

43. A wireless network node, the wireless network node comprising: A communication unit is configured to receive, from a wireless terminal, channel occupancy time (COT) sharing information indicating that COT sharing is unavailable.

44. The radio network node according to claim 43, further comprising a processor, wherein the processor is configured to execute the wireless communication method according to claim 20 or 21.

45. A wireless terminal, comprising: communication unit, and A processor configured to perform a first channel access procedure for a first transmission, wherein after the first channel access procedure is initiated, a second channel access procedure for a second transmission subsequent to the first transmission is initiated, and / or after the associated authorization of the first transmission is received, an associated authorization of the second transmission is received.

46. ​​The wireless terminal according to claim 45, wherein: The processor is further configured to perform the wireless communication method according to any one of claims 23 to 33.

47. A wireless terminal, comprising: communication unit, and A processor is configured to perform a channel access procedure on a priority transmission having a lower priority value among the first transmission and the second transmission, wherein the channel access procedure is performed based on at least one channel access parameter of the priority transmission.

48. The wireless terminal according to claim 47, wherein: The processor is further configured to perform the wireless communication method according to any one of claims 35 to 40.

49. A computer program product comprising computer readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement the wireless communication method according to any one of claims 1 to 40.

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