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WO2025091408A1 - Procédé d'accès à un canal, procédé de communication, terminal et support de stockage - Google Patents

Procédé d'accès à un canal, procédé de communication, terminal et support de stockage Download PDF

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Publication number
WO2025091408A1
WO2025091408A1 PCT/CN2023/129427 CN2023129427W WO2025091408A1 WO 2025091408 A1 WO2025091408 A1 WO 2025091408A1 CN 2023129427 W CN2023129427 W CN 2023129427W WO 2025091408 A1 WO2025091408 A1 WO 2025091408A1
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WO
WIPO (PCT)
Prior art keywords
transmission
channels
channel access
channel
terminal
Prior art date
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Application number
PCT/CN2023/129427
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English (en)
Chinese (zh)
Inventor
赵群
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Xiaomi Mobile Software Co Ltd
Original Assignee
Beijing Xiaomi Mobile Software Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Xiaomi Mobile Software Co Ltd filed Critical Beijing Xiaomi Mobile Software Co Ltd
Priority to CN202380011941.2A priority Critical patent/CN120304002A/zh
Priority to PCT/CN2023/129427 priority patent/WO2025091408A1/fr
Publication of WO2025091408A1 publication Critical patent/WO2025091408A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present disclosure relates to the field of communication technology, and in particular, to a channel access method, a communication method, a terminal, a communication system, and a storage medium.
  • terminals can communicate not only on licensed frequency bands, but also on unlicensed frequency bands.
  • the communication methods of terminals have also been expanded.
  • terminals can communicate through direct links (sidelink).
  • terminals can communicate through direct links on unlicensed frequency bands, but there are some technical problems in channel access in this scenario.
  • the embodiments of the present disclosure propose a channel access method, a communication method, a terminal and a storage medium to solve the technical problems in the related art.
  • a channel access method is proposed, which is executed by a first terminal.
  • the method includes: triggering a channel access process for multiple channels in an unlicensed frequency band based on a first transmission in a direct link; and determining a multi-channel access mechanism for accessing the multiple channels based on a second transmission after the first transmission.
  • a communication method is proposed, which is executed by a second terminal.
  • the method includes: communicating with the first terminal described in the first aspect through a direct link on multiple channels in an unlicensed frequency band.
  • a terminal comprising: one or more processors; wherein the terminal is used to execute the channel access method described in the first aspect.
  • a terminal comprising: one or more processors; wherein the terminal is used to execute the communication method described in the second aspect.
  • a communication system comprising a first terminal and a second terminal, wherein the first terminal is configured to implement the channel access method described in the first aspect, and the second terminal is configured to implement the communication method described in the second aspect.
  • a storage medium which stores instructions.
  • the communication device executes the channel access method described in the first aspect and/or the communication method described in the second aspect.
  • the terminal when a terminal needs to perform a second transmission after a first transmission, the terminal can comprehensively consider the first transmission and the second transmission, so as to reasonably determine a multi-channel access mechanism for accessing multiple channels, and then perform multi-channel access based on the determined multi-channel access mechanism, which is conducive to avoiding the above-mentioned technical problem of large multi-channel access delay as much as possible.
  • FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.
  • FIG2 is an interactive schematic diagram showing a communication method according to an embodiment of the present disclosure.
  • FIG3 is a schematic diagram showing a multi-channel access scenario according to an embodiment of the present disclosure.
  • FIG4 is a schematic flowchart of a channel access method according to an embodiment of the present disclosure.
  • FIG5 is a schematic diagram showing another multi-channel access scenario according to an embodiment of the present disclosure.
  • FIG6 is a schematic diagram showing another multi-channel access scenario according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic block diagram of a terminal according to an embodiment of the present disclosure.
  • FIG8 is a schematic block diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 9A is a schematic diagram of the structure of a communication device proposed in an embodiment of the present disclosure.
  • FIG. 9B is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide a channel access method, a communication method, a terminal, and a storage medium.
  • an embodiment of the present disclosure proposes a channel access method executed by a first terminal, the method comprising: triggering a channel access process for multiple channels in an unlicensed frequency band based on a first transmission in a direct link; and determining a multi-channel access mechanism for accessing the multiple channels based on a second transmission after the first transmission.
  • the terminal when the terminal needs to perform the second transmission after the first transmission, the terminal can comprehensively consider the first transmission and the second transmission, so as to reasonably determine the multi-channel access mechanism for accessing multiple channels, and then perform multi-channel access based on the determined multi-channel access mechanism, which is conducive to avoiding the above-mentioned technical problem of large multi-channel access delay as much as possible.
  • the multi-channel access mechanism includes at least one of the following: a first multi-channel access mechanism; a second multi-channel access mechanism.
  • the first multi-channel access mechanism includes: a multi-channel access mechanism for direct link transmission.
  • the second multi-channel access mechanism includes at least one of the following:
  • Type B2 multi-channel access mechanism for direct link synchronization broadcast blocks
  • the first transmission includes at least one of the following: a physical direct link feedback channel; and a direct link synchronization broadcast block.
  • the method further includes: the first transmission includes a direct link synchronization broadcast block, and a multi-channel access mechanism for accessing the multiple channels is determined according to a second transmission after the first transmission, or a first part of channels in the multiple channels where the second transmission exists after the first transmission is determined, and repeated transmission of the direct link synchronization broadcast block is determined in the first part of channels.
  • the method further comprises: determining that the multi-channel access mechanism used to access the first part of channels includes the first multi-channel access mechanism.
  • the method further includes: when performing repeated transmission of direct link synchronization broadcast blocks on the first part of the channels, the first part of the channels includes discontinuous channels, and the first terminal does not support repeated transmission of direct link synchronization broadcast blocks on discontinuous channels, determining to perform repeated transmission of direct link synchronization broadcast blocks on a channel between the discontinuous channels.
  • the second transmission includes at least one of the following:
  • a physical direct link channel occupies one channel.
  • determining a multi-channel access mechanism for accessing the multiple channels according to a second transmission after a first transmission comprises: determining a first portion of channels in the multiple channels where the second transmission exists after the first transmission; and determining a multi-channel access mechanism for accessing the first portion of channels according to the second transmission.
  • the multi-channel access mechanism for accessing the first part of the channels is determined according to the second transmission, comprising: the second transmission includes a physical direct link channel occupying multiple channels, and the multi-channel access mechanism for accessing the first part of the channels is determined to be the first multi-channel access mechanism.
  • the multi-channel access mechanism for accessing the first part of the channels is determined according to the second transmission, comprising: the second transmission includes a physical direct link channel occupying one channel, and the multi-channel access mechanism for accessing the multiple channels is determined to be the second multi-channel access mechanism.
  • the method further includes: determining a second portion of channels in the multiple channels where the second transmission does not exist after the first transmission; and determining a multi-channel access mechanism for accessing the second portion of channels based on the number of channels in the second portion of channels.
  • the multi-channel access mechanism for accessing the second part of channels according to the number of channels in the second part of channels comprises: the number of channels in the second part of channels is multiple, and the multi-channel access mechanism for accessing the second part of channels comprises the second multi-channel access mechanism; wherein the method further comprises: the number of channels in the second part of channels is one, and the channel access mechanism for accessing the second part of channels comprises a single-channel access mechanism.
  • the method further includes at least one of the following:
  • the second part of the channels is successfully accessed and transmission is performed on the second part of the channels.
  • the physical direct link channel includes at least one of the following: a physical direct link control channel; and a physical direct link shared channel.
  • the second transmission includes at least one of the following: a second transmission sent by the first terminal; a second transmission sent by a second terminal other than the first terminal, wherein the first terminal and the second terminal share the multiple channels.
  • the second transmission after the first transmission includes at least one of the following: a second transmission adjacent to the first transmission in the time domain; a second transmission with a first interval in the time domain being less than an interval threshold.
  • the method further comprises: when the first interval is greater than 16 microseconds, performing channel occupancy time recovery when performing the second transmission.
  • an embodiment of the present disclosure proposes a communication method, which is executed by a second terminal, and the method includes: communicating with the first terminal described in any one of the first aspect and the optional embodiments of the first aspect through a direct link on multiple channels in an unlicensed frequency band.
  • an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the terminal is used to execute the channel access method described in any one of the first aspect and the optional embodiments of the first aspect.
  • an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the terminal is used to execute the communication method described in the second aspect.
  • an embodiment of the present disclosure proposes a communication system, comprising a first terminal and a second terminal, wherein the first terminal is configured to implement the channel access method described in any one of the first aspect and the optional embodiments of the first aspect, and the second terminal is configured to implement the communication method described in the second aspect.
  • an embodiment of the present disclosure proposes a storage medium, which stores instructions.
  • the communication device executes the channel access method described in any one of the first aspect, the optional embodiments of the first aspect, and/or the communication method described in the second aspect.
  • an embodiment of the present disclosure proposes a program product.
  • the communication device executes the method described in the first aspect, the second aspect, or any one of the optional embodiments of the first aspect.
  • an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect, the second aspect, or any one of the optional embodiments of the first aspect.
  • the embodiments of the present disclosure provide a channel access method, a communication method, a terminal, and a storage medium.
  • the terms such as channel access method, information processing method, and communication method can be interchangeable, the terms such as terminal, information processing device, and communication device can be interchangeable, and the terms such as information processing system and communication system can be interchangeable.
  • each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined.
  • a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged.
  • the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.
  • plurality refers to two or more.
  • the terms "at least one of”, “one or more”, “a plurality of”, “multiple”, etc. can be used interchangeably.
  • "at least one of A and B", “A and/or B", “A in one case, B in another case”, “in response to one case A, in response to another case B”, etc. may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.
  • the recording method of "A or B” may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed).
  • A A is executed independently of B
  • B B is executed independently of A
  • execution is selected from A and B (A and B are selectively executed).
  • prefixes such as “first” and “second” in the embodiments of the present disclosure are only for distinguishing different description objects and do not constitute any restrictions on the position, order, priority, quantity or content of the description objects.
  • description objects please refer to the description in the context of the claims or embodiments, and no unnecessary restrictions should be constituted due to the use of prefixes.
  • the description object is "field”
  • the ordinal number before “field” in “first field” and “second field” does not limit the position or order between “fields”
  • “first” and “second” do not limit whether the "fields” they modify are in the same message, nor do they limit the order of "first field” and “second field”.
  • the description object is "level”
  • the ordinal number before “level” in “first level” and “second level” does not limit the priority between “levels”.
  • the number of description objects is not limited by ordinal numbers and can be one or more.
  • “first device” can be one or more.
  • the objects modified by different prefixes can be the same or different.
  • first device and second device can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information”, “first transmission” and “second transmission” can be the same information or different information, and their contents can be the same or different.
  • “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.
  • the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not less than,” and “above” may be used.
  • the terms “less than”, “less than or equal to”, “not greater than”, “less than”, “less than or equal to”, “no more than”, “lower than”, “lower than or equal to”, “not higher than”, “below” and the like can be used interchangeably.
  • devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments.
  • Terms such as “device”, “equipment”, “device”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.
  • network may be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).
  • terminal In some embodiments, the terms "terminal”, “terminal device”, “user equipment (UE)”, “user terminal” “mobile station (MS)”, “mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client and the like can be used interchangeably.
  • the access network device, the core network device, or the network device can be replaced by a terminal.
  • the various embodiments of the present disclosure can also be applied to a structure in which the access network device, the core network device, or the network device and the communication between the terminals is replaced by the communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.).
  • D2D device-to-device
  • V2X vehicle-to-everything
  • it can also be set as a structure in which the terminal has all or part of the functions of the access network device.
  • terms such as "uplink” and "downlink” can also be replaced by terms corresponding to communication between terminals (for example, "side”).
  • uplink channels, downlink channels, etc. can be replaced by side channels
  • uplinks, downlinks, etc. can be replaced by side links.
  • the terminal may be replaced by an access network device, a core network device, or a network device.
  • the access network device, the core network device, or the network device may also be configured to have a structure that has all or part of the functions of the terminal.
  • acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.
  • data, information, etc. may be obtained with the user's consent.
  • each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.
  • FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.
  • a communication system 100 includes a first terminal 101 and a second terminal 102 , wherein the first terminal and the second terminal can communicate via a direct link, and further, the first terminal and the second terminal can communicate via a direct link on one or more channels in an unlicensed frequency band.
  • the first terminal and the second terminal may also communicate with a network device, for example, the network device includes at least one of the following: an access network device, a core network device (core network device).
  • the network device includes at least one of the following: an access network device, a core network device (core network device).
  • the first terminal 101 and the second terminal 102 include, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in a smart city (smart city), and at least one of a wireless terminal device in a smart home (smart home), but are not limited to these.
  • a mobile phone a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR)
  • the access network device is, for example, a node or device that accesses a terminal to a wireless network.
  • the access network device may include an evolved Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.
  • eNB evolved Node B
  • ng-eNB next generation evolved Node B
  • gNB next generation Node B
  • NB node
  • the core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements.
  • the network element may be virtual or physical.
  • the core network may include, for example, at least one of the Evolved Packet Core (EPC), the 5G Core Network (5GCN), and the Next Generation Core (NGC).
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the technical solution of the present disclosure may be applicable to the Open RAN architecture.
  • the interfaces between access network devices or within access network devices involved in the embodiments of the present disclosure may become internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.
  • the access network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit).
  • the CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.
  • the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure.
  • a person of ordinary skill in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.
  • the following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or part of the subject, but are not limited thereto.
  • the subjects shown in FIG1 are examples, and the communication system may include all or part of the subjects in FIG1 , and may also include other subjects other than FIG1 , the number and form of each subject are arbitrary, each subject may be physical or virtual, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be Any method, it can be direct connection or indirect connection, it can be wired connection or wireless connection.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G the fourth generation mobile communication system
  • 5G 5G new radio
  • FAA Future Radio Access
  • RAT New Radio
  • NR New Radio
  • NX New radio access
  • the present invention relates to wireless communication systems such as LTE, Wi-Fi (X), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) network, Device to Device (D2D) system, Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle to Everything (V2X), systems using other communication methods, and next-generation systems expanded based on them.
  • PLMN Public Land Mobile Network
  • D2D Device to Device
  • M2M Machine to Machine
  • IoT Internet of Things
  • V2X Vehicle to Everything
  • systems using other communication methods and next-generation systems expanded based on them.
  • next-generation systems expanded based on them.
  • a combination of multiple systems for example, a combination of
  • FIG2 is an interactive schematic diagram showing a communication method according to an embodiment of the present disclosure.
  • the communication method includes:
  • Step S201 A first terminal accesses multiple channels through a multi-channel access mechanism.
  • the plurality of channels are a plurality of channels in an unlicensed frequency band.
  • the channel access process to the plurality of channels is triggered based on a first transmission by the first terminal on the direct link.
  • the multi-channel access mechanism includes at least one of the following: a first multi-channel access mechanism; a second multi-channel access mechanism.
  • the first multi-channel access mechanism includes: a multi-channel access mechanism for direct link transmission.
  • the second multi-channel access mechanism includes at least one of the following:
  • Type B2 multi-channel access mechanism for direct link synchronization broadcast blocks
  • the first transmission includes at least one of: a physical direct link feedback channel; a direct link synchronization broadcast block.
  • the first terminal A second transmission subsequent to the first transmission determines a multi-channel access mechanism for accessing the plurality of channels.
  • the first terminal upon determining that a first portion of channels for the second transmission exists after the first transmission in the plurality of channels, the first terminal determines to perform repeated transmission of direct link synchronization broadcast blocks in the first portion of channels.
  • the multi-channel access mechanism determined by the first terminal for accessing the first portion of channels includes the first multi-channel access mechanism.
  • the first part of the channel when direct link synchronization broadcast block repetition transmission is performed on the first part of the channel, the first part of the channel includes discontinuous channels, and the first terminal does not support direct link synchronization broadcast block repetition transmission on discontinuous channels, the first terminal determines to perform direct link synchronization broadcast block repetition transmission on the channel between the discontinuous channels.
  • the second transmission includes at least one of the following:
  • a physical direct link channel occupies one channel.
  • the first terminal determines a first portion of channels among the multiple channels where the second transmission exists after the first transmission; and determines a multi-channel access mechanism for accessing the first portion of channels according to the second transmission.
  • the first terminal determines that a multi-channel access mechanism used to access the first part of channels is the first multi-channel access mechanism.
  • the first terminal determines that the multi-channel access mechanism used to access the multiple channels is the second multi-channel access mechanism.
  • the first terminal determines that a second portion of channels of the multiple channels does not exist for the second transmission after the first transmission; and determines a multi-channel access mechanism for accessing the second portion of channels based on the number of channels in the second portion of channels.
  • the first terminal determines that a multi-channel access mechanism for accessing the second part of channels includes the second multi-channel access mechanism.
  • the first terminal determines that the channel access mechanism for accessing the second part of channels includes a single channel access mechanism.
  • the method further comprises at least one of the following:
  • the second part of the channels is successfully accessed and transmission is performed on the second part of the channels.
  • the physical direct link channel includes at least one of the following:
  • the second transmission includes at least one of the following:
  • a second transmission sent by a second terminal other than the first terminal, wherein the first terminal and the second terminal The plurality of channels are shared.
  • the second transmission after the first transmission includes at least one of the following:
  • the first terminal when the first interval is greater than 16 microseconds, performs channel occupancy time recovery when performing the second transmission.
  • Step S202 The first terminal communicates with the second terminal through a direct link on multiple accessed channels.
  • the communication method involved in the embodiment of the present disclosure may include at least one of step S201 to step S202.
  • step S201 may be implemented as an independent embodiment
  • step S202 may be implemented as an independent embodiment, but is not limited thereto.
  • steps S201 and S202 may be performed in an interchangeable order or simultaneously.
  • step S201 is optional, and one or more of these steps may be omitted or replaced in different embodiments.
  • step S202 is optional, and one or more of these steps may be omitted or replaced in different embodiments.
  • terminals can communicate with each other through a direct link (sidelink, SL) in an unlicensed frequency band.
  • SL direct link
  • a first terminal can communicate with a second terminal through a direct link in an unlicensed frequency band, which can be referred to as SL-U (sidelink Unlicensed).
  • a terminal Before accessing a channel in an unlicensed frequency band, a terminal needs to monitor the channel to determine whether it is idle.
  • the monitoring method includes but is not limited to Listen Before Talk (LBT). Only when the channel is determined to be idle can the terminal access the channel for communication.
  • LBT Listen Before Talk
  • one channel may correspond to one resource block set (RB (Resource Block) set), and multiple channels may correspond to multiple resource block sets.
  • RB Resource Block
  • multiple channels may correspond to multiple resource block sets.
  • the terminal when performing some transmissions, the terminal needs to occupy multiple channels in the unlicensed frequency band, and the multi-channel access mechanism may include a first multi-channel access mechanism and a second multi-channel access mechanism.
  • multi-channel access is performed based on the first multi-channel access mechanism.
  • the terminal monitors multiple channels and determines that multiple channels are idle. Only then can the terminal access multiple channels and transmit on multiple channels. Otherwise, if any of the multiple channels is not idle (that is, busy), the terminal cannot access multiple channels and needs to continue to monitor these multiple channels.
  • the base station and the terminal can communicate in an unlicensed frequency band (for example, NR-U (New Radio Unlicensed), and the above-mentioned first multi-channel mechanism is used for the transmission of multiple channels in the uplink transmission.
  • NR-U New Radio Unlicensed
  • the terminal Based on the second multi-channel access mechanism, the terminal monitors multiple channels. When it is determined that some of the multiple channels are idle, the terminal can access some of the idle channels and transmit on the accessed channels, without having to access the channels when multiple channels are idle.
  • base stations and terminals can communicate in unlicensed frequency bands (such as NR-U (New Radio Unlicensed), and the above-mentioned second multi-channel mechanism is used for transmission that occupies multiple channels in downlink transmission.
  • the access conditions of the second multi-channel access mechanism are more relaxed. That is, compared with multi-channel access through the first multi-channel access mechanism, the terminal can more easily access the channel through the second multi-channel access mechanism to ensure that the communication operation is carried out in a timely manner.
  • the terminal needs to occupy multiple channels in the unlicensed frequency band for direct link transmission, including at least one of the following:
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • the direct link synchronization broadcast block (Sidelink Synchronization Signal/PBCH (Physical Broadcast Channel) Block, S-SSB) is transmitted on multiple channels.
  • PBCH Physical Broadcast Channel
  • a single transmission may occupy multiple channels.
  • multiple PSFCHs may occupy multiple channels, and one PSFCH corresponds to one physical direct link transmission, and is used to transmit feedback information for the physical direct link, such as feedback on whether the physical direct link transmission is successfully received.
  • the terminal may perform repeated transmission (repetition) of S-SSB on multiple channels.
  • the purpose of performing repeated transmission of S-SSB includes but is not limited to occupying multiple channels.
  • the terminal can use the first multi-channel access mechanism for multi-channel access. Take PSSCH transmission as an example. Since the terminal can access multiple channels required for PSSCH when multi-channel access is performed based on the first multi-channel access mechanism, the smooth transmission of PSSCH can be ensured.
  • the terminal can use the second multi-channel access mechanism for multi-channel access.
  • the terminal when multiple channels need to be occupied, the terminal can use the second multi-channel access mechanism for multi-channel access.
  • the terminal Taking S-SSB transmission as an example, in the case of multi-channel access based on the second multi-channel access mechanism, the terminal only needs to access some channels for S-SSB repeated transmission when some channels among the multiple channels are idle, which is conducive to ensuring that the S-SSB repeated transmission is carried out in a timely manner.
  • the terminal when the terminal performs multi-channel access in an unlicensed frequency band, it needs to first transmit one of PSFCH and S-SSB, and then transmit at least one of PSCCH and PSSCH.
  • the channel required for the first direct link transmission and the channel required for the subsequent direct link transmission may be different, so there will be some technical problems in determining the multi-channel access mechanism.
  • FIG3 is a schematic diagram showing a multi-channel access scenario according to an embodiment of the present disclosure.
  • the direct link transmission first performed by the terminal on multiple channels in the unlicensed frequency band includes S-SSB repeated transmission, and the subsequent direct link transmission includes PSSCH.
  • the terminal's first repeated S-SSB transmission needs to occupy three channels: CH#1, CH#2, and CH#3; the subsequent PSSCH transmission only needs to occupy two channels: CH#1 and CH#2.
  • the terminal can only access the three channels for transmission at the same time when all three channels are idle.
  • the second multi-channel access mechanism since the access conditions of the first multi-channel access mechanism are more stringent, it is easy to fail to meet the access conditions of the first multi-channel access mechanism. If it is necessary to continue monitoring these multiple channels, it will lead to a technical problem of large multi-channel access delay.
  • an embodiment of the present disclosure proposes a channel access method.
  • Figure 4 is a schematic flow chart of a channel access method according to an embodiment of the present disclosure. The channel access method shown in this embodiment can be executed by a first terminal.
  • the channel access method may include the following steps:
  • step S401 a channel access process for multiple channels in an unlicensed frequency band is triggered based on a first transmission in a direct link;
  • step S402 a multi-channel access mechanism for accessing multiple channels is determined according to a second transmission after the first transmission.
  • FIG. 4 can be implemented independently or in combination with at least one other embodiment in the present disclosure.
  • the specific selection can be made as needed, and the present disclosure is not limited thereto.
  • a channel access process to multiple channels in the unlicensed frequency band may be triggered.
  • a multi-channel access mechanism needs to be determined first.
  • the terminal when a terminal needs to perform a second transmission after a first transmission, the terminal can comprehensively consider the first transmission and the second transmission, so as to reasonably determine a multi-channel access mechanism for accessing multiple channels, and then perform multi-channel access based on the determined multi-channel access mechanism, which is conducive to avoiding the above-mentioned technical problem of large multi-channel access delay as much as possible.
  • the number of channels occupied by the first transmission is different from the number of channels occupied by the second transmission that is subsequently performed. Therefore, in some embodiments, before executing the steps in the embodiments of the present disclosure, it may be determined whether the number of channels occupied by the first transmission is the same as the number of channels occupied by the second transmission that is subsequently performed. If they are different, the steps in the embodiments of the present disclosure are executed. If they are the same, the steps in the embodiments of the present disclosure may not be executed, but multi-channel access may be performed according to the first multi-channel access mechanism.
  • the multi-channel access mechanism includes at least one of the following:
  • multi-channel access is performed based on the first multi-channel access mechanism.
  • the terminal monitors multiple channels and determines that multiple channels are idle. Only then can the terminal access multiple channels and transmit on multiple channels. Otherwise, if any channel among the multiple channels is not idle (that is, busy), the terminal cannot access multiple channels and needs to continue to monitor these multiple channels.
  • the terminal monitors multiple channels. When it is determined that some of the multiple channels are idle, the terminal can access the idle channels and transmit on the accessed channels, without having to access the channels only when multiple channels are idle.
  • the first multi-channel access mechanism includes: multi-channel access mechanism for direct link transmission (Multi-channel access procedures for SL transmissions).
  • the multi-channel access mechanism for direct link transmission may be applied to at least one of the following: PSCCH, PSSCH, S-SSB, PSFCH.
  • a terminal may perform multi-channel access and perform direct link transmission on multiple accessed channels.
  • the multiple channels that the terminal needs to access are called a channel set C.
  • the following is an exemplary description of the specific content of the multi-channel access mechanism for direct link transmission:
  • Type 1 channel access procedure is used for direct link transmission on channel set C
  • the terminal may transmit on a channel c i in the channel set C using the type 2A channel access mechanism described in section 4.5.2.1,
  • channel frequencies of channel set C are a subset of the channel frequency set defined in section [2X], and
  • the terminal uniformly randomly selects a channel c j from the channel set C,
  • a terminal may transmit on channel c i using a type 1 channel access mechanism
  • the terminal may not transmit on the channel c i within the carrier bandwidth on which the terminal is scheduled or configured with direct link resources.
  • the second multi-channel access mechanism includes at least one of the following:
  • Type B2 multi-channel access mechanism for direct link synchronization broadcast blocks
  • PSFCH and S-SSB are collectively referred to as the first transmission below.
  • the terminal can access multiple channels that perform only the first transmission.
  • the counter N described in Section 4.5.1 is determined for each channel c i and is denoted as N Ci , which is maintained based on Section 4.5.6.1.1 or 4.5.6.1.2.
  • CW refers to the contention window.
  • the counter N described in Section 4.5.1 is determined independently for each channel ci and is denoted N Ci .
  • the terminal when the absence of any other technology for sharing the channel cannot be guaranteed in the long term (e.g. by adjusting the level), when the terminal stops transmitting on any channel c j in C, for each channel c i , when an idle sensing slot is detected after waiting for a duration of 4T sl or after reinitializing N Ci , the terminal can resume decrementing N Ci for performing the channel access procedure respectively.
  • the terminal When a terminal stops the first transmission on any channel for which N Ci is determined, the terminal shall reinitialize N Ci for all channels separately.
  • the terminal can access multiple channels that perform only the first transmission.
  • the terminal selects a channel c j in C based on at least one of the following methods:
  • the terminal selects c j uniformly randomly from C before each transmission on multiple channels c i in C;
  • C is the set of channels on which the terminal intends to transmit
  • i 0, 1, ..., q-1
  • q is the number of channels on which the terminal intends to make the first transmission.
  • the terminal shall perform channel access on channel c j according to the procedure described in Section 4.5.1 with the modifications described in Section 4.5.6.2.1 or 4.5.6.2.2 in order to access the channel to perform the first transmission.
  • Channel c i is considered idle for a duration T mc if the channel is sensed as idle during all the durations of performing such idle sensing on channel c j in a given interval T mc .
  • the terminal may not transmit on channel c i (i not equal to j) for a period exceeding T m cot,p given in Table 4.5-1, where the value of T m cot,p is determined using the channel access parameters for channel c j used to access the channel to perform the first transmission.
  • the channels of the channel set C selected by the terminal for the first transmission are a subset of the RB set in the (pre-)configured sidelink resource pool.
  • a single CW p value is maintained for the channel set C.
  • any PSSCH that fully or partially overlaps with channel c i is used in the process described in Section 4.5.4.
  • One CW p value is maintained, independently for each channel c i , using the procedure described in Section 4.5.4.
  • any PSSCH that fully or partially overlaps with channel c i is used in the process described in Section 4.5.4.
  • the CWp value of channel cj1 in C can be used, where cj1 is the channel with the largest CWp value in the channel set C.
  • the first transmission includes at least one of the following:
  • Direct link synchronization broadcast block S-SSB Direct link synchronization broadcast block
  • a multi-channel access process when the terminal needs to perform PSFCH transmission on multiple channels in an unlicensed frequency band, a multi-channel access process can be triggered, wherein, for PSFCH transmission, multiple PSFCHs may occupy multiple channels, and one PSFCH corresponds to one direct link transmission, which is used to transmit feedback information for the direct link, such as feedback on whether the physical direct link transmission is successfully received.
  • a multi-channel access process when a terminal needs to perform S-SSB transmission on multiple channels in an unlicensed frequency band, a multi-channel access process can be triggered, wherein, for S-SSB transmission, the terminal can perform repeated transmission (repetition) of S-SSB on multiple channels.
  • the purpose of repeated transmission of S-SSB includes but is not limited to occupying multiple channels.
  • the channel access method also includes: the first transmission includes a direct link synchronization broadcast block, and a multi-channel access mechanism for accessing multiple channels is determined based on a second transmission after the first transmission, or a first part of channels in multiple channels where a second transmission exists after the first transmission is determined, and repeated transmission of the direct link synchronization broadcast block is determined on the first part of channels.
  • the channel access method further includes: determining that the multi-channel access mechanism used to access the first part of the channels includes a first multi-channel access mechanism.
  • the terminal may trigger the multi-channel access process when it needs to repeatedly transmit S-SSB on multiple channels in the unlicensed frequency band.
  • S-SSB is a repeated transmission and the transmission process is controllable for the terminal, the terminal can choose one of the two operation modes.
  • Method 1 The terminal can determine that there is a first part of channels for the second transmission after the first transmission in multiple channels, and adjust to perform repeated transmission of S-SSB on the first part of channels.
  • the first transmission is performed on the first part of channels
  • the second transmission is also performed on the first part of channels, so the number of channels occupied by the first transmission is the same as the number of channels occupied by the subsequent second transmission. Therefore, there is no need to select a multi-channel access mechanism based on the second transmission, but multi-channel access can be performed directly based on the first multi-channel access mechanism.
  • FIG5 is a schematic diagram showing another multi-channel access scenario according to an embodiment of the present disclosure.
  • the second transmission includes PSSCH.
  • S-SSB repeated transmission needs to occupy 3 channels: CH#1, CH#2, CH#3; the subsequent PSSCH transmission only needs to occupy 2 channels: CH#1 and CH#2.
  • the terminal can determine that the first part of the channels is CH#1 and CH#2. Then, as shown in Figure 5, the terminal can adjust to repeatedly transmit S-SSB on CH#1 and CH#2, that is, the terminal repeatedly transmits S-SSB on CH#1 and CH#2, and then transmits PSSCH.
  • the channels required to be occupied are CH#1 and CH#2, so CH#1 and CH#2 can be accessed based on the first multi-channel access mechanism.
  • Method 2 The terminal may not adjust the channel where the repeated transmission of S-SSB is located, and still based on the embodiment shown in Figure 4, determine the multi-channel access mechanism for accessing multiple channels according to the second transmission after the first transmission.
  • the channel access method also includes: when performing repeated transmission of direct link synchronization broadcast blocks on a first part of the channel, the first part of the channel includes non-contiguous channels, and the first terminal does not support repeated transmission of direct link synchronization broadcast blocks on non-contiguous channels, determining to perform repeated transmission of direct link synchronization broadcast blocks on a channel between non-contiguous channels.
  • the first terminal When the first terminal repeatedly transmits S-SSB on multiple channels in the unlicensed frequency band, if the first terminal does not support repeated transmission of S-SSB on discontinuous channels, the channels occupied by S-SSB need to remain continuous in the frequency domain. However, when the first terminal attempts to perform the operation according to the above method 1, but the channels in the determined first part of the channels are discontinuous, in order to ensure that the capabilities of the first terminal are met, repeated transmission of S-SSB is still required on the channels between the discontinuous channels, thereby ensuring that the channels occupied by S-SSB are continuous in the frequency domain.
  • the operation can be performed according to the above-mentioned method 2.
  • the first terminal may not perform the first transmission, or the first terminal may give up the first transmission on one or more channels to ensure the continuity of the channels used to transmit the first transmission.
  • the second transmission includes at least one of the following:
  • a physical direct link channel occupies one channel.
  • the physical direct link channel includes at least one of the following:
  • a channel access process to multiple channels in an unlicensed frequency band is triggered based on a first transmission in a direct link, including: a terminal performs a first transmission (for example, transmitting PSFCH and/or S-SSB) on n channels in the unlicensed frequency band through a direct link to trigger a channel access process to n channels.
  • a first transmission for example, transmitting PSFCH and/or S-SSB
  • a multi-channel access mechanism for accessing multiple channels is determined according to a second transmission after a first transmission, including: if a second transmission is required on m channels out of n channels after the first transmission (for example, transmitting PSCCH and/or PSSCH), then the terminal can select a multi-channel access mechanism for accessing n channels according to the situation of PSCCH and/or PSSCH, wherein m and n are integers, m ⁇ n, and m is greater than or equal to 1.
  • a multi-channel access mechanism for accessing multiple channels is determined based on a second transmission after a first transmission, including: determining a first portion of channels among multiple channels where a second transmission exists after the first transmission; and determining a multi-channel access mechanism for accessing the first portion of channels based on the second transmission.
  • the terminal can determine a first portion of channels among multiple channels on which the second transmission needs to be performed. Then, for this first portion of channels, the terminal can determine a multi-channel access mechanism based on the second transmission, and access the first portion of channels based on the determined multi-channel access mechanism.
  • a channel access mechanism for accessing the second part of channels will be exemplarily described in subsequent embodiments.
  • a multi-channel access mechanism for accessing the first part of the channels is determined based on the second transmission, including: the second transmission includes a physical direct link channel occupying multiple channels, and the multi-channel access mechanism for accessing the first part of the channels is determined to be a first multi-channel access mechanism.
  • the first part of the channels includes multiple channels, and in the multiple channels included in the first part of the channels, there are both first transmissions and second transmissions, so the number of channels occupied by the first transmission in the first part of the channels is the same as the number of channels occupied by the subsequent second transmission.
  • multi-channel access can be selected in the first part of the channels based on the first multi-channel access mechanism, so that the second transmission can be performed when all the channels in the first part are idle, which is conducive to ensuring the smooth progress of the second transmission.
  • determining a multi-channel access mechanism for accessing the first portion of channels based on the second transmission includes:
  • the second transmission includes a physical direct link channel occupying one channel, and a multi-channel access mechanism for accessing multiple channels is determined to be a second multi-channel access mechanism.
  • the second transmission after the first transmission includes a physical direct link channel (such as PSCCH and/or PSSCH) occupying a channel
  • a physical direct link channel such as PSCCH and/or PSSCH
  • the channel access method further includes: determining a second portion of channels in multiple channels where no second transmission occurs after a first transmission; and determining a multi-channel access mechanism for accessing the second portion of channels based on the number of channels in the second portion of channels.
  • the terminal may determine a first portion of channels among the multiple channels on which the second transmission is required, and a second portion of channels other than the first portion of channels among the multiple channels.
  • the second portion of channels since they are only used for the first transmission and not for the second transmission, when determining a channel access mechanism for accessing the second portion of channels, it is not necessary to consider the second transmission, but rather determine a multi-channel access mechanism for accessing the second portion of channels based on the number of channels in the second portion of channels.
  • determining a multi-channel access mechanism for accessing the second portion of channels according to the number of channels in the second portion of channels includes: the number of channels in the second portion of channels is multiple, and determining that the multi-channel access mechanism for accessing the second portion of channels includes a second multi-channel access mechanism;
  • the channel access method further includes: the number of channels in the second part of channels is one, and determining that the channel access mechanism used to access the second part of channels includes a single channel access mechanism.
  • a second multi-channel access mechanism can be selected to access the second part of the channels as quickly as possible and reduce the delay of the transmission operation.
  • the number of channels in the second part of channels is one, then it is not necessary to use a multi-channel access mechanism for accessing the second part of channels, but a single-channel access mechanism can be selected for accessing.
  • the channel access method further includes at least one of the following:
  • the second part of the channel is successfully accessed and transmission is performed on the second part of the channel.
  • the terminal For the first part of the channel and the second part of the channel, if the terminal successfully accesses any part, it can transmit on the part of the channel that has been successfully accessed, without having to transmit only when both the first part of the channel and the second part of the channel have been successfully accessed. This is helpful to ensure that the transmission operation is carried out as soon as possible.
  • the second transmission includes at least one of the following:
  • the first terminal may share multiple channels in an unlicensed frequency band with a second terminal (which may be one or more terminals), for example, the second terminal is a responding terminal of the first terminal.
  • the first terminal and the second terminal share multiple channels in an unlicensed frequency band
  • the first terminal shares its own channel occupancy time (COT) with the second terminal, so that the second terminal can perform SL-U transmission on the reserved resources within the COT.
  • COT channel occupancy time
  • the first terminal When the first terminal triggers the channel access process for the multiple channels based on the first transmission on the direct link, even if the first terminal does not need to perform a second transmission after the first transmission, if the second terminal needs to perform a second transmission after the first transmission (for example, on reserved resources), the first terminal still needs to determine the multi-channel access mechanism for accessing the multiple channels based on the second transmission.
  • the first terminal determines the multi-channel access mechanism for accessing multiple channels, in addition to considering the second transmission of the first terminal itself after the first transmission, it also needs to consider the second transmission of the second terminal after the first transmission.
  • the second transmission after the first transmission includes at least one of the following:
  • the embodiments of the present disclosure are mainly implemented in a scenario where a terminal needs to perform a second transmission after a first transmission.
  • the second transmission after the first transmission does not refer to any transmission after the first transmission, but a transmission that needs to meet certain conditions in the time domain.
  • the second transmission may be a second transmission that is adjacent to the first transmission in the time domain; for example, the second transmission may be a second transmission that has a first interval in the time domain with the first transmission that is less than an interval threshold, wherein the interval threshold may be configured by a network device, or may be determined based on a protocol agreement, for example, the interval threshold may be a channel occupancy time (COT), for example, the interval threshold may include multiple time domain units, and the time domain unit includes at least one of the following: frame, subframe, time slot (slot), symbol (symbol).
  • COT channel occupancy time
  • the interval threshold may include multiple time domain units, and the time domain unit includes at least one of the following: frame, subframe, time slot (slot), symbol (symbol).
  • FIG6 is a schematic diagram showing another multi-channel access scenario according to an embodiment of the present disclosure.
  • the terminal's first repeated S-SSB transmission needs to occupy three channels: CH#1, CH#2, and CH#3; the subsequent PSSCH#1 transmission is in CH#1 and is adjacent to the S-SSB, and the subsequent PSSCH#2 is in CH#2, and the first interval between it and the S-SSB is less than the interval threshold, then PSSCH#1 and PSSCH#2 both belong to the second transmission after the first transmission.
  • the second transmission is not limited to the transmission in the above-mentioned cases.
  • it can also be a transmission within the same channel occupancy time (COT) as the first transmission, and the present disclosure does not limit this.
  • COT channel occupancy time
  • the channel access method further includes: the first interval is greater than 16 microseconds, and the second transmission Channel occupancy time recovery (COT resuming) is performed during the transmission, and channel access is performed on each channel through type 2A.
  • the first interval is greater than 16 microseconds
  • the second transmission Channel occupancy time recovery (COT resuming) is performed during the transmission, and channel access is performed on each channel through type 2A.
  • the terminal Since the first transmission and the second transmission are performed on the unlicensed frequency band, when the interval between the second transmission and the first transmission is relatively large (for example, greater than 16 microseconds), the terminal needs to perform channel occupation time recovery when performing the second transmission, so as to ensure that the second transmission is still performed on the unlicensed frequency band.
  • the terminal When the interval between the second transmission and the first transmission is relatively small (for example, less than or equal to 16 microseconds), the terminal does not need to perform channel occupation time recovery when performing the second transmission, and can directly perform the second transmission.
  • the names of information, etc. are not limited to the names recorded in the embodiments, and terms such as “information”, “message”, “signal”, “signaling”, “report”, “configuration”, “indication”, “instruction”, “command”, “channel”, “parameter”, “domain”, “field”, “symbol”, “symbol”, “code element”, “codebook”, “codeword”, “codepoint”, “bit”, “data”, “program”, and “chip” can be used interchangeably.
  • terms such as “uplink”, “uplink”, “physical uplink” can be interchangeable, and terms such as “downlink”, “downlink”, “physical downlink” can be interchangeable, and terms such as “side”, “sidelink”, “side communication”, “sidelink communication”, “direct connection”, “direct link”, “direct communication”, “direct link communication” can be interchangeable.
  • terms such as “moment”, “time point”, “time”, and “time position” can be interchangeable, and terms such as “duration”, “period”, “time window”, “window”, and “time” can be interchangeable.
  • frame radio frame
  • subframe slot
  • sub-slot sub-slot
  • mini-slot mini-slot
  • sub-slot sub-slot
  • mini-slot mini-slot
  • obtain can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from high levels, obtaining by self-processing, autonomous implementation, etc.
  • the present disclosure also provides an embodiment of a terminal.
  • FIG7 is a schematic block diagram of a terminal according to an embodiment of the present disclosure. As shown in FIG7 , the terminal includes a processing module 701 and a communication module 702 .
  • the processing module is used to trigger a channel access process for multiple channels in an unlicensed frequency band based on a first transmission in a direct link; and determine a multi-channel access mechanism for accessing the multiple channels based on a second transmission after the first transmission.
  • the multi-channel access mechanism includes at least one of the following: a first multi-channel access mechanism; a second multi-channel access mechanism.
  • the first multi-channel access mechanism includes: a multi-channel access mechanism for direct link transmission.
  • the second multi-channel access mechanism includes at least one of the following:
  • Type B2 multi-channel access mechanism for direct link synchronization broadcast blocks
  • the first transmission includes at least one of: a physical direct link feedback channel; a direct link synchronization broadcast block.
  • the processing module is used to, when the first transmission includes a direct link synchronization broadcast block, determine a multi-channel access mechanism for accessing the multiple channels based on a second transmission after the first transmission, or determine a first portion of channels among the multiple channels where the second transmission exists after the first transmission, and determine to perform repeated transmission of the direct link synchronization broadcast block on the first portion of channels.
  • the processing module is used to determine that the multi-channel access mechanism used to access the first part of channels includes the first multi-channel access mechanism.
  • the processing module is also used to, when direct link synchronization broadcast block repeated transmission is performed on the first part of the channel, the first part of the channel includes discontinuous channels, and the first terminal does not support direct link synchronization broadcast block repeated transmission on discontinuous channels, determine to perform direct link synchronization broadcast block repeated transmission on the channel between the discontinuous channels.
  • the second transmission includes at least one of the following:
  • a physical direct link channel occupies one channel.
  • the processing module is used to determine a first portion of channels among the multiple channels where the second transmission exists after the first transmission; and determine a multi-channel access mechanism for accessing the first portion of channels based on the second transmission.
  • the processing module is used to, when the second transmission includes a physical direct link channel occupying multiple channels, determine a multi-channel access mechanism for accessing the first part of channels as the first multi-channel access mechanism.
  • the processing module is used to, when the second transmission includes a physical direct link channel occupying one channel, determine that a multi-channel access mechanism for accessing the multiple channels is the second multi-channel access mechanism.
  • the processing module is also used to determine a second portion of channels among the multiple channels in which the second transmission does not exist after the first transmission; and determine a multi-channel access mechanism for accessing the second portion of channels based on the number of channels in the second portion of channels.
  • the processing module is used to: the number of channels in the second part of channels is multiple, and the multi-channel access mechanism for accessing the second part of channels includes the second multi-channel access mechanism; the number of channels in the second part of channels is one, and the channel access mechanism for accessing the second part of channels includes Including single channel access mechanism.
  • the communication module is used to successfully access the first portion of channels and transmit on the first portion of channels; and successfully access the second portion of channels and transmit on the second portion of channels.
  • the physical direct link channel includes at least one of the following: a physical direct link control channel; a physical direct link shared channel.
  • the second transmission includes at least one of: a second transmission sent by the first terminal; a second transmission sent by a second terminal other than the first terminal, wherein the first terminal shares the plurality of channels with the second terminal.
  • the second transmission after the first transmission includes at least one of the following:
  • the processing module is further configured to, when the first interval is greater than 16 microseconds, perform channel occupancy time recovery during the second transmission.
  • Fig. 8 is a schematic block diagram of a terminal according to an embodiment of the present disclosure. As shown in Fig. 8 , the terminal includes: a communication module 801 .
  • the communication module is used to communicate with the first terminal described in any of the above embodiments through a direct link on multiple channels in an unlicensed frequency band.
  • the relevant parts refer to the partial description of the method embodiment.
  • the device embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.
  • the embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods.
  • a device is also proposed, including a unit or module for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.
  • a network device such as an access network device, a core network function node, a core network device, etc.
  • the division of the units or modules in the above device is only a division of logical functions, and in actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated.
  • the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory.
  • the processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device.
  • CPU central processing unit
  • microprocessor a microprocessor
  • the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be realized by designing the hardware circuits.
  • the hardware circuits may be understood as one or more processors.
  • the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules are realized by designing the logical relationship of the components within the circuits.
  • the hardware circuits may be implemented by programmable logic devices (PLDs).
  • field programmable gate arrays may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuration files, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices may be called by the processor using software.
  • the present invention may be implemented in the form of a software component, or entirely implemented in the form of a hardware circuit, or partially implemented in the form of a processor calling software and the rest implemented in the form of a hardware circuit.
  • the processor is a circuit with signal processing capability.
  • the processor may be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the process of the processor loading a configuration document to implement the hardware circuit configuration may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules.
  • it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as Neural Network Processing Unit (NPU), Tensor Processing Unit (TPU), Deep Learning Processing Unit (DPU), etc.
  • ASIC Neural Network Processing Unit
  • NPU Neural Network Processing Unit
  • TPU Tensor Processing Unit
  • DPU Deep Learning Processing Unit
  • the communication device 9100 may be a network device (e.g., an access network device, a core network device, etc.), or a terminal (e.g., a user device, etc.), or a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods.
  • the communication device 9100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.
  • the communication device 9100 includes one or more processors 9101.
  • the processor 9101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit.
  • the baseband processor may be used to process the communication protocol and the communication data
  • the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute the program, and process the data of the program.
  • the communication device 9100 is used to execute any of the above methods.
  • one or more processors 9101 are used to call instructions so that the communication device 9100 executes any of the above methods.
  • the communication device 9100 further includes one or more transceivers 9102.
  • the transceiver 9102 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, steps S201, S202), but not limited thereto), and the processor 9101 performs at least one of the other steps (for example, steps S201, S202, but not limited thereto).
  • the transceiver may include a receiver and/or a transmitter, and the receiver and the transmitter may be separate or integrated together.
  • the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc. may be replaced with each other, the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc. may be replaced with each other, and the terms receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.
  • the communication device 9100 further includes one or more memories 9103 for storing data.
  • the memories 9103 may also be outside the communication device 9100.
  • the communication device 9100 may include one or more interface circuits 9104.
  • the interface circuit 9104 is connected to the memory 9102, and the interface circuit 9104 may be used to receive data from the memory 9102 or other devices, and may be used to send data to the memory 9102 or other devices.
  • the interface circuit 9104 may read the data stored in the memory 9102 and send the data to the processor 9101.
  • the communication device 9100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 9100 described in the present disclosure is not limited thereto, and the structure of the communication device 9100 may not be limited by FIG. 9A.
  • the communication device may be an independent device or may be part of a larger device.
  • the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs,
  • the above IC assembly may also include a storage component for storing data and programs; (3) ASIC, such as a modem; (4) modules that can be embedded in other devices; (5) receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.; (6) others, etc.
  • FIG. 9B is a schematic diagram of the structure of a chip 9200 provided in an embodiment of the present disclosure.
  • the communication device 9100 may be a chip or a chip system
  • the chip 9200 includes one or more processors 9201.
  • the chip 9200 is configured to execute any of the above methods.
  • the chip 9200 further includes one or more interface circuits 9202.
  • the terms interface circuit, interface, transceiver pin, etc. can be interchangeable.
  • the chip 9200 further includes one or more memories 9203 for storing data.
  • all or part of the memory 9203 can be outside the chip 9200.
  • the interface circuit 9202 is connected to the memory 9203, and the interface circuit 9202 can be used to receive data from the memory 9203 or other devices, and the interface circuit 9202 can be used to send data to the memory 9203 or other devices.
  • the interface circuit 9202 can read the data stored in the memory 9203 and send the data to the processor 9201.
  • the interface circuit 9202 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, steps S201 and S202, but not limited thereto).
  • the interface circuit 9202 performs the communication steps such as sending and/or receiving in the above method, for example, means that the interface circuit 9202 performs data interaction between the processor 9201, the chip 9200, the memory 9203, or the transceiver device.
  • the processor 9201 performs at least one of the other steps (for example, steps S201 and S202, but not limited thereto).
  • modules and/or devices described in the embodiments such as virtual devices, physical devices, chips, etc. can be combined or separated as needed.
  • some or all steps can also be performed by multiple modules and/or devices in collaboration, which is not limited here.
  • the present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 9100, the communication device 9100 executes any of the above methods.
  • the storage medium is an electronic storage medium.
  • the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices.
  • the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.
  • the present disclosure also proposes a program product, which, when executed by the communication device 9100, enables the communication device 9100 to execute any of the above methods.
  • the program product is a computer program product.
  • the present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente divulgation se rapporte au domaine technique des communications, et concerne en particulier un procédé d'accès à un canal, un procédé de communication, un terminal et un support de stockage. Le procédé d'accès au canal consiste à : déclencher un processus d'accès au canal pour une pluralité de canaux dans une bande de fréquences sans licence sur la base d'une première transmission dans une liaison latérale ; et sur la base d'une seconde transmission après la première transmission, déterminer un mécanisme d'accès multicanal pour accéder à la pluralité de canaux. Selon la présente divulgation, lorsqu'un terminal doit effectuer une seconde transmission après une première transmission, le terminal peut considérer globalement la première transmission et la seconde transmission, ce qui permet de déterminer raisonnablement un mécanisme d'accès multicanal pour accéder à une pluralité de canaux, puis d'effectuer un accès multicanal sur la base du mécanisme d'accès multicanal déterminé, ce qui facilite l'évitement du problème technique d'un grand retard d'accès multicanal dans la mesure du possible.
PCT/CN2023/129427 2023-11-02 2023-11-02 Procédé d'accès à un canal, procédé de communication, terminal et support de stockage Pending WO2025091408A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202380011941.2A CN120304002A (zh) 2023-11-02 2023-11-02 信道接入方法、通信方法、终端和存储介质
PCT/CN2023/129427 WO2025091408A1 (fr) 2023-11-02 2023-11-02 Procédé d'accès à un canal, procédé de communication, terminal et support de stockage

Applications Claiming Priority (1)

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PCT/CN2023/129427 WO2025091408A1 (fr) 2023-11-02 2023-11-02 Procédé d'accès à un canal, procédé de communication, terminal et support de stockage

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US20190075562A1 (en) * 2017-09-01 2019-03-07 Laurent Cariou Enhanced channel access for wireless communications
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CN115669174A (zh) * 2020-04-15 2023-01-31 诺基亚技术有限公司 免许可频谱中的节点之间的通信
WO2023044713A1 (fr) * 2021-09-24 2023-03-30 Oppo广东移动通信有限公司 Procédé et appareil de communication

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CN115669174A (zh) * 2020-04-15 2023-01-31 诺基亚技术有限公司 免许可频谱中的节点之间的通信
CN113632582A (zh) * 2021-07-08 2021-11-09 北京小米移动软件有限公司 基于物理直连通信数据信道的通信方法、装置及存储介质
WO2023044713A1 (fr) * 2021-09-24 2023-03-30 Oppo广东移动通信有限公司 Procédé et appareil de communication

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