WO2023001220A1 - 信道接入方法、设备和存储介质 - Google Patents

信道接入方法、设备和存储介质 Download PDF

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Publication number
WO2023001220A1
WO2023001220A1 PCT/CN2022/106962 CN2022106962W WO2023001220A1 WO 2023001220 A1 WO2023001220 A1 WO 2023001220A1 CN 2022106962 W CN2022106962 W CN 2022106962W WO 2023001220 A1 WO2023001220 A1 WO 2023001220A1
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Prior art keywords
signal
sent
channel access
transmission resource
channel
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PCT/CN2022/106962
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English (en)
French (fr)
Inventor
邢卫民
卢有雄
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中兴通讯股份有限公司
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Priority to KR1020247005782A priority Critical patent/KR20240034841A/ko
Publication of WO2023001220A1 publication Critical patent/WO2023001220A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present application relates to the communication field, for example, to a channel access method, device and storage medium.
  • SideLink Sidelink
  • SL Sidelink
  • V2X vehicle to anything
  • SL communication operates on licensed frequency bands or dedicated frequency bands, for example, V2X (vehicle to anything) communication can operate on frequency bands dedicated to the Internet of Vehicles.
  • V2X vehicle to anything
  • the traditional SL communication mechanism does not consider the coexistence problem between the SL device and other system devices in the license-exempt frequency band, such as the coexistence with the WiFi device.
  • Embodiments of the present application provide a channel access method, device, and storage medium, which realize coexistence between SL devices and other devices in a license-exempt frequency band.
  • An embodiment of the present application provides a channel access method applied to a first communication node, including:
  • Determining the transmission resource corresponding to the SL signal to be sent in the case of detecting a sent SL signal that satisfies a preset condition at a previous opportunity of the transmission resource, using the first channel access type to perform channel access; wherein, the The detection duration of the channel access process corresponding to the first channel access type is a fixed value.
  • An embodiment of the present application provides a channel access method applied to a second communication node, including:
  • An embodiment of the present application provides a channel access device applied to a first communication node, including:
  • the determination module is configured to determine the transmission resource corresponding to the SL signal to be sent; the first access module is configured to detect a sent SL signal that satisfies a preset condition at a previous opportunity of the transmission resource, and use the first The channel access type performs channel access; wherein, the detection duration of the channel access process corresponding to the first channel access type is a constant value.
  • An embodiment of the present application provides a channel access device applied to a second communication node, including:
  • a configurator configured to configure at least one transmission resource or transmission resource pool of SL signals corresponding to each SL signal type, so that the first communication node uses the transmission resources or transmission resources in the transmission resource pool to perform SL signals transmission.
  • An embodiment of the present application provides a channel access device, including: a communication module, a memory, and one or more processors; the communication module is configured to perform communication interaction between a first communication node and a second communication node; The memory is configured to store one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors are configured to implement any of the above-mentioned embodiments. channel access method.
  • An embodiment of the present application provides a storage medium, where a computer program is stored in the storage medium, and when the computer program is executed by a processor, the channel access method described in any one of the foregoing embodiments is implemented.
  • FIG. 1 is a schematic diagram of the relationship between a LBT duration and transmission resources provided by an embodiment of the present application
  • FIG. 2 is a flow chart of a channel access method provided in an embodiment of the present application.
  • FIG. 3 is a flow chart of another channel access method provided by an embodiment of the present application.
  • FIG. 4 is an access schematic diagram of a channel access process provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of the composition of a sent SL signal that satisfies preset conditions provided by an embodiment of the present application
  • FIG. 6 is a structural block diagram of a channel access device provided in an embodiment of the present application.
  • FIG. 7 is a structural block diagram of another channel access device provided by an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a channel access device provided by an embodiment of the present application.
  • SL communication refers to all direct communication.
  • SideLink communication can be divided into two types of communication modes: the first type of mode (abbreviation, mode 1 or mode 1), in which the user equipment (User Equipment, UE) sends SideLink signals The resource comes from the scheduling of the base station; in the second type of mode (abbreviation, mode 2 or mode 2), the UE independently selects the resource pool in the network configuration or pre-configured resource pool (resource pool) according to the resource selection strategy.
  • resources, resource selection strategies include: sensing mechanism, partial sensing mechanism, and random selection mechanism.
  • the side link communication resource obtained by mode 1 or mode 2 can be called a side link resource authorization (SL grant).
  • SL grant side link resource authorization
  • SL resource allocation process whether it is mode 1 based on scheduling or mode 2 based on sensing, after the UE is granted a grant, it can perform signal transmission on the resource of the grant, but SL is performed in the traditional license-free frequency band.
  • LBT Listen Before Talk
  • the UE can continue to send signals; otherwise, the UE needs to give up signal transmission on the selected resource.
  • FIG. 1 is a schematic diagram of a relationship between an LBT duration and a transmission resource provided by an embodiment of the present application. As shown in FIG. 1 , when the channel is determined to be idle (idle) within the LBT duration, the device can perform signal transmission.
  • the channel When describing channel access, the channel represents a physical layer communication medium, for example, a wireless channel with a 20MHz bandwidth; when describing the channel/signal sent or received by the device, the channel represents a signal Structure or format, such as Physical Sidelink Control Channel (PSCCH), which is a channel/signal structure designed for control information; Physical Sidelink Shared Channel (PSSCH), which is expressed as A channel/signal structure designed for data information; Physical Sidelink Feedback Channel (PSFCH), which represents a channel/signal structure designed for feedback information.
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSFCH Physical Sidelink Feedback Channel
  • SL communication has designed a variety of channels/signals, including the above-mentioned PSCCH, PSSCH, and PSFCH, and can also include signals/channels for synchronization, such as Sidelink Synchronization signal/physical broadcast channel Block (Sidelink Synchronization signal/physical broadcast channel Block, S-SSB), in the future, it can also include other channels or reference signals (Reference Signal, RS), for example, RS can include side link positioning reference signal (SideLink Positioning Reference Signal, SL PRS), etc., and these SL channels will be collectively referred to hereafter Or the SL reference signal is the SL signal.
  • S-SSB Sidelink Synchronization signal/physical broadcast channel Block
  • Configuration including pre-configuration, refers to the process of notifying some configuration or pre-configuration information to one or a group of devices.
  • NR-U New Radio on Unlicensed band
  • LBT procedures also called channel access procedure, channel access procedure
  • the duration of the LBT before the process is sent is a fixed value, for example, the duration of the LBT of Type 2A is equal to 25us, and the duration of the LBT of Type 2B/2C The duration is equal to 16us, and for Type 2C, the device does not perform LBT monitoring during this duration. You can refer to the agreement, and will not repeat it here.
  • Random-duration channel access procedure (Type 1 channel access procedure): The duration of the LBT before the process is sent is not a fixed value, but a random value.
  • the LBT duration may be equal to Td+N*Tsl, wherein Td is a deffer duration (deffer duration), Tsl is the duration of a LBT sensing slot (sensing slot) (generally 9us), and N is a random value.
  • Type 1 can be divided into multiple channel access priority classes (CAPC, Channel Access Priority Class). Different CAPCs can correspond to different backoff time, channel occupation time (Channel Occupied Time, COT), random number interval and other parameters. You can refer to the agreement, and will not repeat it here. In an embodiment, FIG.
  • FIG. 2 is a flowchart of a channel access method provided in an embodiment of the present application. This embodiment can be executed by a channel access device.
  • the channel access device may be the first communication node.
  • the first communication node may be a terminal side (for example, user equipment). As shown in FIG. 2, this embodiment includes S210-S220.
  • the SL signal to be sent refers to the SL signal that needs to be sent.
  • the transmission resource corresponding to the SL signal to be sent may come from the scheduling of the second communication node; it may also be selected by the first communication node from the resource pool configured in the network or pre-configured according to the resource selection strategy.
  • resources that is, the transmission resources corresponding to the SL to be sent can be realized through mode 1 or mode 2.
  • the resource selection strategy may include: a perception mechanism; a partial perception mechanism; a random selection mechanism.
  • the second communications node refers to the base station side or the network side.
  • the detection duration of the channel access process corresponding to the first channel access type is a fixed value.
  • the first channel access type corresponds to the channel access procedure (namely Type 2 channel access procedure) with a certain duration in the above embodiment.
  • the sent SL signal refers to the SL signal whose transmission has been completed.
  • the channel access procedure corresponding to the first channel access type is used to perform channel access. enter.
  • the device corresponding to the SL signal to be sent and the device corresponding to the sent LS signal belong to the same type of device, that is, both belong to the SL device.
  • Detecting the sent SL signal that satisfies the preset conditions at the previous opportunity of the transmission resource corresponding to the SL signal to be sent refers to detecting that similar devices have successfully competed for the channel at the previous opportunity of the transmission resource corresponding to the SL signal to be sent resources (i.e. transfer resources).
  • the SL signal to be transmitted directly uses a fixed value of detection duration to perform channel access, thereby realizing The channel access effect of SL equipment in the license-free frequency band to achieve coexistence with other equipment.
  • the channel access method applied to the first communication node further includes: when the transmitted SL signal satisfying the preset condition is not detected at the previous opportunity of the transmission resource, using the second channel access type for channel access; wherein, the duration of the channel access process corresponding to the second channel access type is a random value or a fixed value, that is, the second channel access type corresponds to the channel access of the determined duration in the above-mentioned embodiment
  • the channel access procedure corresponding to the second channel access type is used to perform channel access. enter.
  • the LBT process is performed before the transmission resource corresponding to the SL signal to be sent, and the LBT process corresponds to a random or definite LBT duration configured by the network.
  • the SL signal detection is performed at the previous opportunity between the transmission resources corresponding to the SL signal to be sent, and the channel access type is determined according to the detection result, that is, it is determined whether to use the first channel access type or the second channel access
  • the channel access process corresponding to the type performs channel access and SL signal transmission.
  • the SL signal to be sent is sent , or, send the filling signal and the SL signal to be sent.
  • the filling signal may be sent first, and then the SL signal to be sent is sent; or the SL signal to be sent may be sent first, and then the filling signal is sent.
  • the length of the filling signal may be predefined, or may be configured by the base station or the network.
  • the filler signal may be a signal composed of a specific sequence, for example, various reference signals; it may also be a normal or truncated data or control channel signal; or a signal sent in a frequency domain comb. This example does not limit the format of the filling signal.
  • the current channel access is switched to the first channel access type.
  • the detection of the sent SL signal meeting the preset condition includes one of the following:
  • At the previous opportunity of the transmission resource at least one sent SL signal is detected; at the previous opportunity of the transmission resource, at least one sent SL signal is detected, and the time domain length of the transmission resource for which the SL signal is to be sent is X symbols Within, where X is a positive integer greater than 2 and less than 7; at the previous opportunity of the transmission resource, at least one transmitted SL signal is detected, and the transmission resource to transmit the SL signal is indicated by the detected transmitted SL signal within the remaining channel occupation time COT; at least one sent SL signal is detected, the transmission resource of the SL signal to be sent is within the remaining COT indicated by the detected sent SL signal, and the priority of the SL signal to be sent is higher than or equal to The priority of the detected sent SL signal.
  • detecting a sent SL signal that satisfies a preset condition at a timing before the transmission resource corresponding to the SL signal to be sent means that the first communication node detects any Send SL signal.
  • the first communication node detects any Send SL signal.
  • the UE corresponding to sending the SL signal can use the channel access procedure corresponding to the first channel access type with a shorter LBT time to perform fast channel access, and when it detects that the accessed channel is idle, the UE to send the SL signal
  • the corresponding UE may send its own SL signal.
  • detecting a sent SL signal that satisfies a preset condition at a timing before the transmission resource corresponding to the SL signal to be sent means that the first communication node detects at least one The SL signal has been sent, and the length of the time domain of the transmission resource of the SL signal to be sent is within X symbols.
  • the length of the time domain of the transmission resource for sending the SL signal is within the number of symbols corresponding to the short signal.
  • X is a positive integer greater than 2 and less than 7.
  • detecting a sent SL signal that satisfies a preset condition at a timing before the transmission resource corresponding to the SL signal to be sent refers to detecting at least one sent SL signal at a timing before the transmission resource , and the transmission resource of the SL signal to be sent is within the remaining channel occupation time COT indicated by the detected sent SL signal.
  • the UE corresponding to the SL signal to be sent detects the sent SL signal indicating the remaining COT, and if the transmission resource of the SL signal to be sent is within the remaining COT, the UE corresponding to the SL signal to be sent can share the duration of the remaining COT so that the UE corresponding to the SL signal to be sent uses the shorter channel access procedure corresponding to the first channel access type to perform fast channel access, and the UE corresponding to the SL signal to be sent detects that the accessed When the channel is idle, the UE corresponding to the SL signal to be sent may send its own SL signal.
  • detecting a sent SL signal that satisfies a preset condition at a timing before the transmission resource corresponding to the SL signal to be sent refers to detecting at least one sent SL signal at a timing before the transmission resource , the transmission resource of the SL signal to be sent is within the remaining COT indicated by the detected sent SL signal, and the priority of the to-be-sent SL signal is higher than or equal to the priority of the detected sent SL signal.
  • the UE corresponding to the SL signal to be sent detects the sent SL signal indicating the remaining COT, and if the transmission resource of the SL signal to be sent is within the remaining COT, the UE corresponding to the sent SL signal can share the remaining COT duration so that the UE corresponding to the SL signal to be sent uses the shorter channel access procedure corresponding to the first channel access type to perform fast channel access, and the UE corresponding to the SL signal to be sent detects that the accessed When the channel is idle, the UE corresponding to the SL signal to be sent may send its own SL signal.
  • the UE corresponding to the SL signal to be sent detects that the sent SL signal of other SL UEs with the same priority occupies the channel at the previous opportunity of the transmission resource, and the remaining shared COT includes the SL signal to be sent
  • the UE corresponding to the SL signal to be sent uses the channel access procedure corresponding to the first channel access type to perform channel access.
  • the remaining COT indicated by the sent SL signal includes one of the following:
  • the longest or shortest remaining COT among all remaining COTs The longest or shortest remaining COT among the remaining COTs corresponding to the detected SL signals whose priority is equal to that of the SL signal to be sent; The longest or shortest remaining COT among the remaining COTs corresponding to the sent SL signals whose priority is equal to or lower than that of the sent SL signal.
  • the sent SL signal also meets one of the following conditions: the power of the sent SL signal exceeds the detection threshold; or, the power of the sent SL signal exceeds the detection threshold corresponding to the priority of the sent SL signal.
  • different priorities may be configured for the sent SL signals, that is, different detection thresholds for whether preset conditions are met. Exemplarily, if a low-priority sent SL signal is detected, when the power of the low-priority sent SL signal exceeds the detection threshold Y1, the detected sent SL signal can be considered valid; As for a high-priority sent SL signal, when the power of the high-priority sent SL signal exceeds the detection threshold Y2, the sent SL signal can be considered valid.
  • the detection thresholds corresponding to different priorities are different. Wherein, the detection threshold Y1 and the detection threshold Y2 are different.
  • the sent SL signal also meets one of the following conditions: the sent SL signal indicates the identity of the UE corresponding to the SL signal to be sent; or, the UE corresponding to the SL signal to be sent is indicated by the sent SL signal One of a group of UEs.
  • detecting a transmitted SL signal further includes:
  • the type of the SL signal to be sent includes at least one of the following: Physical Side Link Control Channel PSCCH, Physical Side Link Shared Channel PSSCH, Physical Side Link Feedback Channel PSFCH, Side Link Synchronization Signal S- SSB, SideLike-Channel State Information Reference Signal (SideLike-Channel State Information Reference Signal, SL CSI-RS), SideLink-Positioning Reference Signal (SideLink-Positioning Reference Signal, SL PRS).
  • the SL signal to be sent, or both the stuffing signal and the SL signal to be sent include at least one of the following: carrying an indication of the priority of the SL signal to be sent; carrying an indication of the remaining COT; carrying an indication of whether to send the filling signal instruct.
  • the indication of the remaining COT includes one of the following:
  • the difference between the detected remaining COT indicated by the sent SL signal and the duration of the transmission resource occupied by the SL signal to be sent; the remaining COT corresponding to the priority of the SL signal to be sent; is zero.
  • the priority corresponding to the SL signal to be sent includes one of the following: the channel access priority CAPC of the SL signal to be sent; the ProSe Per-Packet Priority (ProSe Per-Packet Priority) carried by the SL signal to be sent , PPPP).
  • the previous opportunity is in the same time slot as the transmission resource corresponding to the SL signal to be sent, or the previous opportunity is in a time slot preceding the time slot to which the transmission resource corresponding to the SL signal to be sent belongs.
  • the manner of determining the transmission resource includes one of the following:
  • FIG. 3 is a flow chart of another channel access method provided in an embodiment of the present application.
  • This embodiment can be executed by a channel access device.
  • the channel access device may be the second communication node.
  • the second communication node may be a network side or a base station side. As shown in FIG. 3 , this embodiment includes S310.
  • the second communication node configures at least one transmission resource or transmission resource pool of the SL signal corresponding to each SL signal type, and sends configuration information of the transmission resource or transmission resource pool to the first communication node, The first communication node uses the received transmission resource or the transmission resource in the transmission resource pool to transmit the SL signal.
  • the configuration information of the transmission resource or the transmission resource pool includes at least one of the following:
  • the SL signal type includes one of the following: PSCCH, PSSCH, PSFCH, S-SSB, SL CSI-RS, SL PRS;
  • the channel access type includes one of the following: the first channel access type; The second channel access type; wherein, the duration of LBT in the channel access process corresponding to the first channel access type is a fixed value; the duration of LBT in the channel access process corresponding to the second channel access type is a random value or a fixed value.
  • the channel access process is an LBT process performed before a transmission to be performed, and the LBT process corresponds to a random or definite LBT duration configured by the network.
  • the SL signal detection is performed at an opportunity before the transmission to be performed, and then the channel access and signal transmission schemes to be performed are determined according to the detection results. See the description of the Examples below.
  • the SL signal detection is performed at the previous opportunity of the transmission resource
  • the previous opportunity of the transmission resource may be one used for PSCCH, PSSCH, PSFCH, S-SSB, SL CSI-RS, SL PRS or the above-mentioned An opportunity for a combination.
  • the transmission resource and the previous opportunity are adjacent in physical time.
  • the previous opportunity may be in the same physical time slot as the transmission resource, or in the previous physical time slot of the time slot to which the transmission resource belongs.
  • the previous opportunity may be in the same resource pool as the transmission resource, or may belong to a different resource pool.
  • FIG. 4 is an access schematic diagram of a channel access process provided in an embodiment of the present application.
  • the UE performs the channel access procedure corresponding to the second channel access type in the above embodiment before sending the SL signal (for example, using Type 1 channel access procedure, or Type 2 channel access procedure);
  • the first channel access type for example, Type 2 channel access procedure
  • the sending of stuffing signals is described in the following example.
  • the UE has detected a sent SL signal at a previous opportunity, and the end of the sent SL signal also includes a filling signal (the filling signal can also be called an extended signal, and it will be collectively called a filling signal later), Then the UE can perform the LBT channel access process before the SL signal to be sent (that is, the SL signal to be sent in the above embodiment) after the detected filling signal of the sent SL signal, as shown in the composition example of the interval in Figure 4 2.
  • the base station or the network may configure whether to enable sending a filling signal at the end of the SL signal when configuring the SL resource or the SL resource pool.
  • the length of the padding signal is predefined, or configured by the base station or the network.
  • the detected SL signal indicates whether a fill signal was sent.
  • the detected SL signal also indicates the length of the stuffing signal sent.
  • the UE detects that the SL signal has been sent at the previous opportunity, and the UE sends the signal after the above-mentioned channel access is successful, and the UE sends a filling signal at the head of the SL signal, as shown in the interval in Figure 4 As shown in example 1.
  • the UE sends data packets PSCCH/PSSCH.
  • the UE can start using the above Type 2 channel access type for channel access after the transmission of the data packet at the previous opportunity is completed, and after the detection channel is idle, it first sends a filling signal and then sends an SL signal to be sent , thereby shortening the length of the GP and preventing other devices from seizing the channel.
  • the base station or the network may configure whether to enable sending a filling signal at the header of the SL signal.
  • the length of the padding signal is predefined, or configured by the base station or the network.
  • the UE may also send a filling signal at the end of the SL signal to be sent, and the SL signal to be sent may also indicate whether the filling signal is sent, and may also indicate the length of the filling signal.
  • the filler signal may be a signal composed of a specific sequence, such as various reference signals, or a normal or truncated data or control channel signal, or a signal sent in a frequency domain comb, and Or an extended cyclic prefix signal, that is, the format of the filler signal is not restricted.
  • the UE may only send the SL signal to be sent, or may send a filling signal at the head of the SL signal to be sent, and/or at the end of the SL signal to be sent.
  • the UE before sending the SL signal, performs the channel access procedure corresponding to the second channel access type in the above embodiment (for example, using Type 1 channel access procedure); in another embodiment, when When the UE detects the sent SL signal that meets the preset conditions at the previous opportunity of the transmission resource corresponding to the SL signal to be sent, it uses the first channel access type (such as Type 2 channel access procedure) to access the channel.
  • the first channel access type such as Type 2 channel access procedure
  • the fact that the UE detects a sent SL signal satisfying a preset condition at a timing before the transmission resource corresponding to the SL signal to be sent means that the UE detects any sent SL signal at a timing before the transmission resource. For example, if any sent SL signal is detected, it is considered that other UEs (UE corresponding to the sent SL signal) have already accessed the channel nearby, and the UE can use the first channel access type with a shorter LBT duration to perform fast For channel access, if it detects that the channel is idle after accessing the channel, the UE can send its own SL signal (that is, the SL signal to be sent).
  • the resource of these short signals generally belongs to the same time slot as the resource of the previous opportunity, or when a special SL signal (synchronization signal, discovery signal, etc.), this rule can be used.
  • the fact that the UE detects a sent SL signal that satisfies the preset condition at the previous timing of the transmission resource corresponding to the SL signal to be sent means that the UE detects the sent SL signal at the previous timing of the transmission resource, and the detected The sent SL signal indicates the remaining COT, and the transmission resource of the SL signal to be sent is within the remaining COT.
  • the UE detects the above-mentioned transmitted SL signal indicating the duration of the remaining COT if the transmission of the SL signal to be transmitted by the UE is within the remaining COT, the UE can share the remaining COT and can use the shorter first channel access type.
  • the UE can send its own SL signal.
  • the COT sharing is also restricted, for example, the protocol pre-defined or the base station/network configures a maximum COT duration, which can prevent the SL UE from occupying the channel for too long.
  • the UE can use the first channel access type, otherwise if the remaining COT is too short or is 0, the UE still uses the second channel access type for channel access.
  • the fact that the UE detects a sent SL signal that satisfies a preset condition at a timing before the transmission resource corresponding to the SL signal to be sent refers to detecting at least one sent SL signal at a timing before the transmission resource , the transmission resource of the SL signal to be sent is within the remaining COT indicated by the detected sent SL signal, and the priority of the to-be-sent SL signal is equal to the priority of the detected sent SL signal. For example, if the UE detects the above-mentioned sent SL signal that meets the preset conditions, the UE can share the remaining COT and use the first channel access type with a shorter LBT duration to perform fast channel access.
  • the UE can send its own SL signal (that is, the SL signal to be sent). In an example, when the UE sends its own SL signal, it guarantees to complete the transmission within the remaining COT.
  • COT sharing can also be described based on priority. For example, the protocol is predefined or the base station/network is configured with a maximum COT duration. Different priorities (such as different CAPCs) have different COT limits. This allows sharing of channel occupancy time between SL signals with the same priority.
  • the UE Only when the UE detects that the signal of other SL UEs with the same priority occupies the channel at the previous opportunity of transmitting resources, and the shared remaining COT covers the transmission of the UE, the UE can use the first channel access type, otherwise , the UE still uses the second channel access type for channel access.
  • the fact that the UE detects a sent SL signal that satisfies a preset condition at a timing before the transmission resource corresponding to the SL signal to be sent refers to detecting at least one sent SL signal at a timing before the transmission resource
  • the transmission resource of the SL signal to be sent is within the remaining COT indicated by the detected sent SL signal, and the priority of the to-be-sent SL signal is higher than or equal to the priority of the detected sent SL signal.
  • the UE detects the above-mentioned SL signal that meets the preset conditions the UE can share the remaining COT and use the first channel access type with a shorter LBT duration to perform fast channel access.
  • the UE can send its own SL signal.
  • COT sharing can also be described based on priority.
  • the protocol pre-defined or the base station/network configures a maximum COT duration, and different priorities (such as different CAPCs) have different COT limits. , so that the UE (that is, the device corresponding to the SL signal to be sent) can share the channel occupancy time of the sent SL signal with the same priority as itself, or with a lower priority than itself.
  • the sent SL signal also meets one of the following conditions: the power of the sent SL signal exceeds the detection threshold; or, the power of the sent SL signal exceeds the detection threshold corresponding to the priority of the sent SL signal.
  • the network or the base station may set a detection threshold, and the UE detects that the transmitted SL signal exceeds the detection threshold, and considers the detected transmitted SL signal to be valid.
  • the network or the base station can set a detection threshold for each priority, and the detected transmitted SL signal is considered valid only when the detected transmitted SL signal exceeds the detection threshold corresponding to the priority.
  • the detection threshold refers to a reference signal receiving power (Reference Signal Receiving Power, RSRP) detection threshold, for example, a detection threshold of a demodulation reference signal (DeModulation Reference Signal, DMRS) for a control or data channel.
  • RSRP Reference Signal Receiving Power
  • DMRS DeModulation Reference Signal
  • detecting a sent SL signal may also include: obtaining side link control information (Sidelink Control Information, SCI) carried by the sent SL signal; or obtaining the type of the sent SL signal.
  • SCI Sidelink Control Information
  • the remaining COT and SL signal priorities and the like may be carried in the SCI.
  • the type of the transmitted SL signal includes one of the following: Physical Side Link Control Channel PSCCH, Physical Side Link Shared Channel PSSCH, Physical Side Link Feedback Channel PSFCH, Side Link Synchronization Signal/Physical Broadcast Channel Block S- SSB, side link channel state information reference signal SL CSI-RS, side link positioning reference signal SL PRS.
  • the sent SL signal also meets one of the following conditions: the sent SL signal indicates the identity of the UE corresponding to the SL signal to be sent; or, the UE corresponding to the SL signal to be sent is a UE indicated by the sent SL signal One of the group UEs.
  • the identifier of the above-mentioned UE or information of a group of UEs indicated is carried in the SCI. For example, only when the UE is a UE that is allowed to use the remaining COT or a UE in a group of UEs, the UE can use the first channel access type with a shorter LBT duration to perform fast channel access.
  • the detected remaining COT indicated by the sent SL signal means that the remaining COT is indicated in the SCI carried in the detected sent SL signal.
  • the remaining COT indicates the number of time slots included in the remaining COT. For example, a counter of remaining time slots may be indicated, and when the counter or timer is 0, it means that the COT has ended or the COT is not shared.
  • the network or the base station can configure whether to enable COT sharing, and this configuration can be configured for each resource pool or each group of resources.
  • the UE may also choose to close COT sharing, for example, the UE may not indicate the remaining COT or set the indicated remaining COT to 0 in the sent SL signal.
  • the remaining COT duration indicated by the detected sent SL signal refers to the longest or shortest of the remaining COTs remaining COTs.
  • the UE may detect sent SL signals sent by multiple UEs at a previous opportunity of the transmission resource, and there may be multiple remaining COTs carried therein.
  • the transmission of the UE needs to be within all indicated remaining COTs, that is, within the shortest remaining COT; in one example, if a more aggressive method is used, the transmission of the UE only needs to Within the longest remaining COT.
  • the UE when determining the remaining COTs indicated by the detected sent SL signals, the priority of the detected sent SL signals and The priority of the SL signal to be sent.
  • the UE may share the remaining COT with the same priority as the SL signal to be transmitted.
  • the detected sent SL signals may contain SL signals with the same priority as the SL signals to be sent, and the SL signals sent by these UEs are within the longest or shortest remaining COT indicated by the sent SL signals of the same priority. within.
  • the UE may share the same priority as the SL signal to be sent after determining the remaining COT indicated by the detected sent SL signal, Or, the remaining COTs with a lower priority than the SL signal to be sent.
  • the detected sent SL signal may contain the sent SL signal with the same priority as the SL signal to be sent, and/or, the sent SL signal with a lower priority than the SL signal to be sent, the UE sends The SL signal to be sent is within the longest or shortest remaining COT indicated by these sent SL signals of the same or lower priority.
  • the remaining COT it carries is the COT duration corresponding to the priority of the SL signal to be sent. For example, if the UE does not detect the transmitted SL signal that meets the preset conditions, the UE uses the channel access procedure corresponding to the second channel access type to access and succeeds. At this time, the UE starts a COT, and the remaining COTs are allocated by the UE. Set according to the priority of the signal sent by itself.
  • the remaining COT duration carried by it is the remaining COT indicated by the detected SL signal sent minus the remaining time occupied by the SL signal corresponding to the UE to be sent. duration. For example, if the UE detects a sent SL signal that satisfies the preset conditions, the UE uses the channel access procedure corresponding to the first channel access type to access and succeeds. At this time, it can be considered that the UE shares a COT enabled by other UEs. , the UE itself does not open a new COT, then the remaining COT carried by the sent SL signal to be sent is the remaining COT indicated by the detected sent SL signal minus the duration occupied by the UE sent by the SL signal to be sent.
  • the UE if the UE executes the above-mentioned first channel access type or the second channel access type and accesses the channel, it does not carry an indication of the remaining COT, or the carried remaining COT is set to 0. For example, UE turns off COT sharing.
  • different SL signals to be sent correspond to different priorities.
  • the priority of the SL signal to be sent may be PPPP.
  • a PPPP can be bound, and its value is 1 to 8. The smaller the value, the higher the priority, that is, the priority The priority is high, and it can also be equivalent to a small or low priority number.
  • S-SSB S-SSB
  • PSFCH Packet Control Channel
  • SL PRS SL PRS
  • the PPPP of the SL signal to be sent can be configured by the base station or the network, such as S-SSB , PSFCH, SL PRS priority.
  • the priority of an SL signal to be sent is determined by the PPPP of other SL signals that trigger or correlate with the signal.
  • the PPPP of PSFCH is set to the PPPP used by the SL data packet it responds to, and the PPPP of SL PRS is also the same as its associated SL data packet (PSCCH/PSSCH).
  • the priority of the SL signal to be sent may be CAPC.
  • a CAPC can be bound, and its value is 1 to 4. The smaller the value, the higher the priority, that is, the priority High, it can also be equivalent to a small or low priority number.
  • the priority of the SL signal to be sent may be CAPC, and there is a mapping relationship between PPPP and CAPC.
  • each PPPP corresponds to one of the four CAPCs
  • a high-priority PPPP corresponds to a high-priority CAPC.
  • a PPPP can be bound, and then the CAPC of the data packet can be determined according to the mapping relationship between PPPP and CAPC.
  • the priority of the SL signal to be sent may be CAPC.
  • CAPC of the SL signal to be sent can be configured by the base station or the network, or the protocol is predefined, for example, the CAPC of S-SSB, PSFCH, and SL PRS is determined by the configuration.
  • the priority of an SL signal to be transmitted is determined by the CAPC of other SL signals that trigger or correlate to that signal.
  • the CAPC of PSFCH is set to the CAPC used by the SL data packet it responds to, and the CAPC of SL PRS is also the same as its associated SL data packet (PSCCH/PSSCH).
  • the PPPP of the SL signal to be sent can be configured by the base station or the network, such as S-SSB, PSFCH, PPPP of SL PRS, and the CAPC can be determined according to the mapping relationship.
  • the PPPP of the SL signal to be sent is determined by the PPPP of other SL signals triggering or associated with the signal, and then the CAPC of these signals can be determined according to the mapping relationship.
  • the UE before transmitting the SL signal to be sent, the UE first determines the transmission resource corresponding to the SL signal to be sent.
  • the acquisition and determination method of the transmission resource includes one of the following: determining the transmission resource corresponding to the SL signal to be transmitted based on the scheduling of the second communication node; autonomously selecting the transmission resource corresponding to the SL signal to be transmitted in the resource pool; Based on the configuration of the second communication node, the transmission resource corresponding to the SL signal to be sent is determined; and the transmission resource corresponding to the SL signal to be sent is determined based on the associated SL signal.
  • the transmission resource is determined in the following manner:
  • the UE determines the transmission resource corresponding to the SL signal to be sent based on the scheduling of the base station or the central node (eg, the group head node). For example, the base station or the central node allocates or schedules specific transmission resources for the UE.
  • the base station or the central node allocates or schedules specific transmission resources for the UE.
  • the UE autonomously selects the transmission resource corresponding to the SL signal to be sent from the resource pool.
  • the UE may randomly select the transmission resource corresponding to the SL signal to be sent from the resource pool based on sensing or partial sensing.
  • the UE determines the transmission resource corresponding to the SL signal to be sent based on the configuration of the base station or the network.
  • the resources of the S-SSB can be configured by the network or the base station.
  • the UE determines the transmission resource corresponding to the SL signal to be sent based on other associated SL signals.
  • the resource used for the feedback is determined by the associated The data packet is determined.
  • the resources of the data packet and the feedback resources have a definite mapping relationship.
  • the feedback can be PSFCH, SL PRS or SL CSI-RS.
  • the channel access process of the SL synchronization signal is described.
  • the network or the base station may configure or pre-configure the resources used by the SL synchronization signal, and periodically configure one or more groups of SL synchronization on each carrier or each bandwidth part (BandWidth Part, BWP) of each carrier Signal resources.
  • the network or the base station can also configure the channel access priority of the synchronization signal, such as configuring the CAPC of the S-SSB, or the S-SSB can be any CAPC, and can share COT with any priority SL signal, so as to share with other SL Signals are shared by COT. Take S-SSB as a synchronization signal as an example for illustration.
  • a group of S-SSB resources can include multiple S-SSB resources, each S-SSB resource can be regarded as a potential occasion for S-SSB transmission, and multiple S-SSB resources can be continuously distributed in time , or discretely distributed; one S-SSB resource may occupy one time slot or several symbols in one time slot in time.
  • a time slot may also include multiple S-SSB resources.
  • the UE may send S-SSB synchronization signals on these S-SSB resources.
  • the channel access method of S-SSB can be predefined, or directly configured as Type 2A type, and the LBT duration is 25us (25 microseconds).
  • the UE can detect the transmitted SL signal at the previous opportunity of an S-SSB transmission resource.
  • the previous opportunity of the transmission resource corresponding to the SL signal to be transmitted can be in the previous time slot PSCCH/PSSCH resources, or PSFCH resources, etc., or the last S-SSB resource in the same time slot as the S-SSB.
  • the UE performs Type 2A channel access (the second type of channel access above) before sending the S-SSB; Signal, use Type 2B or Type 2C to access the channel (the first channel access type), that is, the corresponding LBT duration becomes 16us.
  • the UE when the UE uses the first channel access type or the second channel type for channel access, the UE can use one or a combination of the above embodiments to perform S-SSB channel access and transmission .
  • the UE can use Type 2A/2B/2C to send S-SSB.
  • S-SSB is a special signal, and the limitation of the remaining COT may not be considered.
  • the S-SSB carries an indication of the remaining COT, or the remaining COT is 0.
  • the S-SSB can share the COTs of all priorities. Similarly, in order to realize COT sharing, it is necessary to add an indication of the remaining COTs in the S-SSB.
  • the network or the base station may configure or pre-configure resource pools used for SL data communication, and configure one or more transmission resource pools or receive resource pools for SL data communication on each carrier or each BWP of each carrier. resource pool.
  • resource pool in addition to configuring the control channel and data channel resources used by SL data communication, feedback channel resources, such as PSFCH resources, and SL reference signal resources, such as SL PRS resources, can also be configured.
  • the PSCCH and the PSSCH can be sent together, and their channel access procedures are also carried out together.
  • the UE may use the channel access solutions in the above embodiments to perform channel access and transmission of PSCCH and PSSCH.
  • the UE performs a Type 1 channel access process (the second channel access type above) before sending PSCCH/PSSCH, and different data priorities correspond to Type 1 channel access processes with different parameters; in another example Among them, when the UE detects the sent SL signal that meets the preset conditions at the time before sending the PSCCH/PSSCH, then use Type 2A, Type 2B or Type 2C to access the channel (the first channel access type), that is, the corresponding The LBT duration of becomes a definite value.
  • Type 1 channel access process the second channel access type above
  • different data priorities correspond to Type 1 channel access processes with different parameters
  • access to the data channel limits the COT sharing duration.
  • the priority of the SL signal to be sent may also be configured.
  • FIG. 5 is a schematic diagram of the composition of a sent SL signal that satisfies a preset condition provided by an embodiment of the present application.
  • the UE detects the timing of a sent SL signal that satisfies a preset condition, That is, the previous opportunity is a combined time slot or combined opportunity including the PSCCH/PSSCH opportunity and the PSFCH opportunity.
  • the UE detects the PSCCH/PSSCH signal in the previous time slot of the transmission resource, and if necessary, detects the indication of priority and/or indication of remaining COT contained therein.
  • the UE in addition to detecting the priority indication and/or remaining COT indication included in the PSCCH/PSSCH, the UE also needs to detect the PSFCH signal. If the PSFCH exists, the UE uses the first channel access type, otherwise the UE uses The second channel access type.
  • the aforementioned PSFCH may also be other SL signals, such as reference signals such as SL PRS.
  • PSFCH for the channel access of the SL feedback channel reference signal, PSFCH is taken as an example for illustration, and the solution in this embodiment is applicable to other SL channels or SL reference signals (such as SL PRS).
  • the network or the base station may configure or pre-configure resource pools used for SL communication, and configure one or more sending resource pools or receiving resource pools for SL communication on each carrier or each BWP of each carrier .
  • resource pool in addition to configuring the control channel and data channel resources used in SL communication, feedback channel resources, such as PSFCH resources, and SL reference signal resources, such as SL PRS resources, can also be configured.
  • UE defaults to using Type 1 channel access (the second channel access type above) to send PSFCH, and the above different data priorities correspond to Type 1 channel access with different parameters; but PSFCH is not a data channel, and there is no direct priority.
  • the PSFCH has the same priority as its associated PSCCH/PSSCH to be fed back.
  • the PSFCH uses a protocol-predefined priority.
  • the PSFCH has a short duration, and the CAPC access channel with the highest priority can be predefined.
  • the PSFCH uses a priority configured by the network or the base station.
  • a PSFCH resource or opportunity may occupy several symbols (for example, 2 symbols) in one time slot, and there may also be resources or opportunities for other SL signals in the same time slot, for example, there may also be PSCCH/PSSCH resources, such as Figure 5 shows.
  • the previous opportunity of a PSFCH resource may be other SL signal resources in the same time slot, such as PSCCH/PSSCH resources in the same time slot.
  • the UE performs Type 1 channel access (the second channel access type above) before sending the PSFCH; in another example, when the UE detects that the SL signal has been sent before sending the PSFCH, for example, in If PSCCH/PSSCH is detected in the same time slot, use Type 2A, 2B or Type 2C to access the channel (the first channel access type), that is, the corresponding LBT duration becomes a definite value.
  • the UE can use Type 2A/2B/2C to send the PSFCH after detecting the sent SL signal at the previous opportunity.
  • the PSFCH signal is short, and in a time slot, if other SL signals are detected in the same time slot, a channel access method with a shorter LBT duration can be used. The limitation of the remaining COT is not considered at this time.
  • the UE when the UE uses the first channel access type or the second channel type for channel access, the UE can use one or a combination of the above embodiments to perform channel access for signals such as PSFCH and SL-PRS. input and send.
  • signals such as PSFCH and SL-PRS. input and send.
  • FIG. 6 is a structural block diagram of a channel access device provided in an embodiment of the present application. This embodiment is applied to the first communication node. As shown in FIG. 6 , this embodiment includes: a determination module 610 and a first access module 620 .
  • the determination module 610 is configured to determine the transmission resource corresponding to the SL signal to be sent; the first access module 620 is configured to detect a sent SL signal meeting a preset condition at a previous opportunity of the transmission resource, and use the first The channel access type is used for channel access; wherein, the detection duration of the channel access process corresponding to the first channel access type is a fixed value.
  • the channel access device applied to the first communication node further includes:
  • the second access module is configured to use the second channel access type to perform channel access when the transmitted SL signal meeting the preset condition is not detected at the previous opportunity of the transmission resource; wherein, the second channel access
  • the detection duration of the channel access process corresponding to the type is a random value or a fixed value.
  • the SL signal to be sent is sent , or, send the filling signal and the SL signal to be sent.
  • the current channel access is switched to the first channel access type.
  • the detection of the sent SL signal meeting the preset condition includes one of the following:
  • At the previous opportunity of the transmission resource at least one sent SL signal is detected; at the previous opportunity of the transmission resource, at least one sent SL signal is detected, and the time domain length of the transmission resource for which the SL signal is to be sent is X symbols Within, where X is a positive integer greater than 2 and less than 7; at the previous opportunity of the transmission resource, at least one transmitted SL signal is detected, and the transmission resource to transmit the SL signal is indicated by the detected transmitted SL signal The remaining channel occupancy duration COT of the remaining channel; at the previous opportunity of the transmission resource, at least one transmitted SL signal is detected, the transmission resource of the SL signal to be transmitted is within the remaining COT indicated by the detected transmitted SL signal, and the SL signal to be transmitted is within the remaining COT The priority of the signal is higher than or equal to the priority of the detected sent SL signal.
  • the remaining COT indicated by the sent SL signal includes one of the following:
  • the longest or shortest remaining COT among all remaining COTs The longest or shortest remaining COT among the remaining COTs corresponding to the detected SL signals whose priority is equal to that of the SL signal to be sent; The longest or shortest remaining COT among the remaining COTs corresponding to the sent SL signals whose priority is equal to or lower than that of the sent SL signal.
  • the sent SL signal also meets one of the following conditions: the power of the sent SL signal exceeds the detection threshold; or, the power of the sent SL signal exceeds the detection threshold corresponding to the priority of the sent SL signal.
  • detecting a transmitted SL signal further includes:
  • the types of SL signals to be sent include at least one of the following: Physical Side Link Control Channel PSCCH, Physical Side Link Shared Channel PSSCH, Physical Side Link Feedback Channel PSFCH, Side Link Synchronization Signal S- SSB, side link channel state information reference signal SL CSI-RS, side link positioning reference signal SL PRS.
  • the SL signal to be sent, or both the stuffing signal and the SL signal to be sent include at least one of the following: carrying an indication of the priority of the SL signal to be sent; carrying an indication of the remaining COT; carrying an indication of whether to send the filling signal instruct.
  • the indication of the remaining COT includes one of the following:
  • the difference between the detected remaining COT indicated by the sent SL signal and the duration of the transmission resource occupied by the SL signal to be sent; the remaining COT corresponding to the priority of the SL signal to be sent; is zero.
  • the priority corresponding to the SL signal to be sent includes one of the following: channel access priority CAPC of the SL signal to be sent; PPPP carried in the SL signal to be sent.
  • the previous opportunity is in the same time slot as the transmission resource corresponding to the SL signal to be sent, or the previous opportunity is in a time slot preceding the time slot to which the transmission resource corresponding to the SL signal to be sent belongs.
  • the manner of determining the transmission resource includes one of the following:
  • the channel access device provided in this embodiment is configured to implement the channel access method applied to the first communication node in the embodiment shown in FIG. 2 .
  • the implementation principle and technical effect of the channel access device provided in this embodiment are similar. Let me repeat.
  • FIG. 7 is a structural block diagram of another channel access device provided in an embodiment of the present application. This embodiment is applied to the second communication node. As shown in FIG. 7 , this embodiment includes: a configurator 710 .
  • the configurator 710 is configured to configure at least one transmission resource or transmission resource pool of the SL signal corresponding to each SL signal type, so that the first communication node uses the transmission resource or transmission resources in the transmission resource pool to transmit the SL signal.
  • the configuration information of the transmission resource or the transmission resource pool includes at least one of the following:
  • the SL signal type includes one of the following: Physical Sidelink Control Channel PSCCH, Physical Sidelink Shared Channel PSSCH, Physical Sidelink Feedback Channel PSFCH, Sidelink Synchronization Signal S-SSB, Sidechain channel state information reference signal SL CSI-RS, side link positioning reference signal SL PRS;
  • the channel access type includes one of the following: the first channel access type; the second channel access type; where the first channel access
  • the duration of the LBT in the channel access process corresponding to the input type is a fixed value; the duration of the LBT in the channel access process corresponding to the second channel access type is a random value or a fixed value.
  • the channel access device provided in this embodiment is configured to implement the channel access method applied to the second communication node in the embodiment shown in FIG. 3 .
  • the implementation principle and technical effect of the channel access device provided in this embodiment are similar. Let me repeat.
  • Fig. 8 is a schematic structural diagram of a channel access device provided by an embodiment of the present application.
  • the device provided by this application includes: a processor 810 , a memory 820 and a communication module 830 .
  • the number of processors 810 in the device may be one or more, and one processor 810 is taken as an example in FIG. 8 .
  • the number of storage 820 in the device may be one or more, and one storage 820 is taken as an example in FIG. 8 .
  • the processor 810, the memory 820, and the communication module 830 of the device may be connected through a bus or in other ways, and connection through a bus is taken as an example in FIG. 8 .
  • the channel access device may be a first communication node, where the first communication node may be a terminal side (for example, user equipment).
  • the memory 820 can be configured to store software programs, computer-executable programs and modules, such as program instructions/modules corresponding to the equipment in any embodiment of the present application (for example, the determination module in the channel access device 610 and the first access module 620).
  • the memory 820 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to usage of the device, and the like.
  • the memory 820 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage devices.
  • memory 820 may include memory located remotely from processor 810, which remote memory may be connected to the device via a network.
  • networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
  • the communication module 830 is configured to perform communication interaction between the first communication node and the second communication node.
  • the channel access device is the first communication node
  • the device provided above may be configured to execute the channel access method applied to the first communication node provided in any of the above embodiments, and have corresponding functions and effects.
  • the channel access device is the second communication node
  • the device provided above may be configured to execute the channel access method applied to the second communication node provided in any of the above embodiments, and have corresponding functions and effects.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions When executed by a computer processor, the computer-executable instructions are used to execute a channel access method applied to a first communication node.
  • the method includes: determining The transmission resource corresponding to the SL signal to be sent; when the sent SL signal meeting the preset condition is detected at the previous opportunity of the transmission resource, the first channel access type is used for channel access; wherein, the first channel access The detection duration of the channel access process corresponding to the type is a fixed value.
  • the embodiment of the present application also provides a storage medium containing computer-executable instructions.
  • the computer-executable instructions When executed by a computer processor, the computer-executable instructions are used to execute a channel access method applied to a second communication node.
  • the method includes: configuring Each SL signal type corresponds to at least one transmission resource or a transmission resource pool for the SL signal, so that the first communication node uses the transmission resource or transmission resources in the transmission resource pool to transmit the SL signal.
  • user equipment covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a vehicle-mounted mobile station.
  • the various embodiments of the present application can be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.
  • Computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages source or object code.
  • ISA Instruction Set Architecture
  • Any logic flow block diagrams in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules and functions, or may represent a combination of program steps and logic circuits, modules and functions.
  • Computer programs can be stored on memory.
  • the memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to Read-Only Memory (ROM), Random Access Memory (RAM), Optical Memory devices and systems (Digital Video Disc (DVD) or Compact Disk (CD)), etc.
  • Computer readable media may include non-transitory storage media.
  • Data processors can be of any type suitable for the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC ), programmable logic devices (Field-Programmable Gate Array, FPGA), and processors based on multi-core processor architectures.
  • DSP Digital Signal Processing
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • processors based on multi-core processor architectures.

Abstract

本文公开一种信道接入方法、设备和存储介质。该信道接入方法包括：确定待发送SL信号对应的传输资源；在传输资源的前一个时机检测到满足预设条件的已发送SL信号的情况下，采用第一信道接入类型进行信道接入；其中，第一信道接入类型所对应的信道接入过程进行探测的时长是一个定值。

Description

信道接入方法、设备和存储介质 技术领域
本申请涉及通信领域，例如涉及一种信道接入方法、设备和存储介质。
背景技术
边链路(SideLink，SL)通信运行在许可频段或者专用频段上，例如V2X(vehicle to anything)通信可以运行在专门用于车联网的频段上。随着SL通信的发展，在传统的免许可频段(unlicensed band)上进行SL发送的需求也越来越强烈。但是，传统的SL通信机制并未考虑SL设备与免许可频段的其他系统的设备之间的共存问题，例如与WiFi设备的共存。
发明内容
本申请实施例提供一种信道接入方法、设备和存储介质，实现了SL设备在免许可频段与其他设备之间的共存。
本申请实施例提供一种信道接入方法，应用于第一通信节点，包括：
确定待发送SL信号对应的传输资源；在所述传输资源的前一个时机检测到满足预设条件的已发送SL信号的情况下，采用第一信道接入类型进行信道接入；其中，所述第一信道接入类型所对应的信道接入过程进行探测的时长是一个定值。
本申请实施例提供一种信道接入方法，应用于第二通信节点，包括：
配置每个SL信号类型所对应的SL信号的至少一个传输资源或传输资源池，以使第一通信节点采用所述传输资源或所述传输资源池中的传输资源进行SL信号的传输。
本申请实施例提供一种信道接入装置，应用于第一通信节点，包括：
确定模块，配置为确定待发送SL信号对应的传输资源；第一接入模块，配置为在所述传输资源的前一个时机检测到满足预设条件的已发送SL信号的情况下，采用第一信道接入类型进行信道接入；其中，所述第一信道接入类型所对应的信道接入过程进行探测的时长是一个定值。
本申请实施例提供一种信道接入装置，应用于第二通信节点，包括：
配置器，配置为配置每个SL信号类型所对应的SL信号的至少一个传输资 源或传输资源池，以使第一通信节点采用所述传输资源或所述传输资源池中的传输资源进行SL信号的传输。
本申请实施例提供一种信道接入设备，包括：通信模块，存储器，以及一个或多个处理器；所述通信模块，配置为在第一通信节点和第二通信节点之间进行通信交互；所述存储器，配置为存储一个或多个程序；当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现上述任一实施例所述的信道接入方法。
本申请实施例提供一种存储介质，所述存储介质存储有计算机程序，所述计算机程序被处理器执行时实现上述任一实施例所述的信道接入方法。
附图说明
图1是本申请实施例提供的一种LBT时长和传输资源之间的关系示意图；
图2是本申请实施例提供的一种信道接入方法的流程图；
图3是本申请实施例提供的另一种信道接入方法的流程图；
图4是本申请实施例提供的一种信道接入过程的接入示意图；
图5是本申请实施例提供的一种满足预设条件的已发送SL信号的组成示意图；
图6是本申请实施例提供的一种信道接入装置的结构框图；
图7是本申请实施例提供的另一种信道接入装置的结构框图；
图8是本申请实施例提供的一种信道接入设备的结构示意图。
具体实施方式
下文中将结合附图对本申请的实施例进行说明。以下结合实施例附图对本申请进行描述，所举实例仅用于解释本申请。
在SL通信系统或者直连通信系统中，设备之间存在业务需要传输的情况下，设备之间的业务数据不经过其他网络设备的转发，而是直接由数据源设备传输给目标设备，即设备间的直接通信。其中，在后续描述中，以SL通信代指所有的直接通信。另外，根据边链路通信资源的分配方法，SideLink通信可以分为两大类通信模式：第一类模式(简称，模式一或mode 1)中，用户设备(User Equipment，UE)发送SideLink信号的资源来自于基站的调度；而第二类模式(简称，模式二或mode 2)中，UE在网络配置或者预配置的资源池(resource pool)中，根据资源选择策略，自主地选择资源池中的资源，资源选择策略包括：感 知(sensing)机制，部分感知(partial sensing)机制，随机选择(random selection)机制。不论是mode 1还是mode 2获取的边链路通信资源，均可以称之为一个边链路资源授权(SL grant)。
对于传统的SL资源分配过程，不论是基于调度的mode 1还是基于sensing的mode 2，UE在获得授权(grant)之后，就可以在grant的资源进行信号传输，但是在传统的免许可频段进行SL的发送之前，按照相关的频段使用规范，需要进行发送前监听(Listen Before Talk，LBT)过程以避免和其他系统的设备的干扰。一般的，若在LBT时长内信道资源被判定为空闲(LBT成功)，UE可以继续发送信号，否则，UE需要放弃在选定的资源上进行信号传输。为了便于后续描述，对感知(Sensing)、信道、配置的含义进行解释说明。
Sensing：一般的，LBT过程和SL资源调度过程中都有sensing过程，但二者是不同的技术。为了后续描述方便，后续将传统SL定义的sensing过程称之为sensing，将LBT对应的sensing过程称之为LBT过程。一般的LBT过程或者信道接入过程发生在设备(可以是基站或终端)进行信号传输之前，其长度在时间上的跨度，可以称之为LBT时长(该时长可以包括多个探测时隙(sensing slots))。图1是本申请实施例提供的一种LBT时长和传输资源之间的关系示意图。如图1所示，在LBT时长内信道被确定为空闲(idle)时，该设备可以进行信号发送。
信道：在描述信道接入时，信道代表的是一种物理层通信媒介，例如，一个20MHz带宽的一个无线信道；当描述设备发送或接收的信道/信号时，所述的信道代表一种信号结构或格式，例如物理边链路控制信道(Physical Sidelink Control Channel，PSCCH)，表示为控制信息设计的一种信道/信号结构；物理边链路共享信道(Physical Sidelink Shared Channel，PSSCH)，表示为数据信息设计的一种信道/信号结构；物理边链路反馈信道(Physical Sidelink Feedback Channel，PSFCH)，表示为反馈信息设计的一种信道/信号结构。SL通信设计了多种信道/信号，包括上述PSCCH，PSSCH，PSFCH，还可以包括用于同步的信号/信道，比如边链路同步信号/物理广播信道块(Sidelink Synchronization signal/physical broadcast channel Block，S-SSB)，在未来还可以包括其他信道或者参考信号(Reference Signal，RS)，例如RS可以包括边链路定位参考信号(SideLink Positioning Reference Signal，SL PRS)等，后续这里统一称这些SL信道或SL参考信号为SL信号。
配置：包括预配置，是指将一些配置或者预配置信息通知给一个或一组设备的过程。
NR-U(New Radio on Unlicensed band)定义了多种LBT过程(也可以称为信 道接入过程，channel access procedure)，以适用于不同的场景。
确定时长的信道接入过程(Type 2 channel access procedure)：该过程在进行发送之前进行的LBT的时长(duration)是一个定值，例如，Type 2A的LBT时长等于25us，Type 2B/2C的LBT时长等于16us，其中对于Type 2C，设备在该时长内并不进行LBT监听。可参考协议，这里不再赘述。
随机时长的信道接入过程(Type 1 channel access procedure)：该过程在进行发送之前进行的LBT的时长(duration)不是一个定值，而是一个随机值。例如，该LBT时长可以等于Td+N*Tsl，其中Td为退避时长(deffer duration)，Tsl为一个LBT探测时隙(sensing slot)的时长(一般为9us)，N为随机值。Type 1又可以分为多种信道接入优先等级(CAPC，Channel Access Priority Class)，不同的CAPC可以对应不同的退避时长，信道占用时长(Channel Occupied Time，COT)，随机数的区间等参数，可参考协议，这里不再赘述。在一实施例中，图2是本申请实施例提供的一种信道接入方法的流程图。本实施例可以由信道接入设备执行。其中，信道接入设备可以为第一通信节点。第一通信节点可以为终端侧(比如，用户设备)。如图2所示，本实施例包括S210-S220。
S210、确定待发送SL信号对应的传输资源。
待发送SL信号指的是需要进行发送的SL信号。在实施例中，待发送SL信号对应的传输资源可以来自第二通信节点的调度；也可以通过第一通信节点在网络配置或预配置的资源池中，根据资源选择策略自主地选择资源池中的资源，即待发送SL对应的传输资源可以通过模式一实现，也可以通过模式二实现。其中，资源选择策略可以包括：感知机制；部分感知机制；随机选择机制。示例性地，第二通信节点指的是基站侧或网络侧。
S220、在传输资源的前一个时机检测到满足预设条件的已发送SL信号的情况下，采用第一信道接入类型进行信道接入。
第一信道接入类型所对应的信道接入过程进行探测的时长是一个定值。在实施例中，第一信道接入类型对应上述实施例中确定时长的信道接入过程(即Type 2 channel access procedure)。其中，已发送SL信号指的是已经完成传输的SL信号。在实施例中，在待发送SL信号对应的传输资源的前一个时机检测到满足预设条件的已发送SL信号的情况下，采用第一信道接入类型所对应的信道接入过程进行信道接入。在实施例中，待发送SL信号对应的设备和已发送LS信号对应的设备属于同类设备，即均属于SL设备。在待发送SL信号所对应的传输资源的前一个时机检测到满足预设条件的已发送SL信号，指的是在待发送SL信号对应的传输资源的前一个时机检测到同类设备成功竞争到信道资源(即传输资源)。
在实施例中，在待发送SL信号对应的传输资源的前一个时机检测到同类设备的已发送SL信号的情况下，待发送SL信号直接采用定值的探测时长进行信道接入，从而实现了SL设备在免许可频段的信道接入效果，以实现和其它设备的共存。
在一实施例中，应用于第一通信节点的信道接入方法，还包括：在传输资源的前一个时机未检测到满足预设条件的已发送SL信号的情况下，采用第二信道接入类型进行信道接入；其中，第二信道接入类型所对应的信道接入过程进行探测的时长是一个随机值或定值，即第二信道接入类型对应上述实施例中确定时长的信道接入过程(即Type 2 channel access procedure)，或者随机时长的信道接入过程(Type 1 channel access procedure)。
在实施例中，在待发送SL对应的传输资源的前一个时机未检测到满足预设条件的已发送SL信号的情况下，采用第二信道接入类型所对应的信道接入过程进行信道接入。在信道接入过程中，在待发送SL信号对应的传输资源之前进行LBT过程，该LBT过程对应一个网络配置的随机或确定的LBT时长。在实施例中，在待发送SL信号对应的传输资源之间的前一个时机进行SL信号检测，根据检测结果确定信道接入类型，即确定采用第一信道接入类型还是采用第二信道接入类型所对应的信道接入过程进行信道接入以及SL信号的发送。
在一实施例中，在采用第一信道接入类型或第二信道接入类型进行信道接入，并且在探测的时长内探测到所接入的信道处于空闲的情况下，发送待发送SL信号，或者，发送填充信号和待发送SL信号。在实施例中，在发送填充信号和待发送SL信号的情况下，可以先发送填充信号，再发送待发送SL信号；也可以先发送待发送SL信号，再发送填充信号。其中，填充信号的长度可以是预定义的，也可以是由基站或网络配置。在实施例中，填充信号可以是特定序列组成的信号，例如，各种参考信号；还可以是正常的或者截断的数据或者控制信道的信号；又或者是频域梳状发送的信号，本实施例对填充信号的格式不作限定。
在一实施例中，在检测到满足预设条件的已发送SL信号的情况下，若第二信道接入类型所对应的信道接入过程已经开始，则将当前信道接入切换为第一信道接入类型。
在一实施例中，检测到满足预设条件的已发送SL信号包括下述之一：
在传输资源的前一个时机，检测到至少一个已发送SL信号；在传输资源的前一个时机，检测到至少一个已发送SL信号，且待发送SL信号的传输资源的时域长度在X个符号之内，其中，X为大于2且小于7的正整数；在传输资源的前一个时机，检测到至少一个已发送SL信号，且待发送SL信号的传输资源 在检测到的已发送SL信号指示的剩余信道占用时长COT内；检测到至少一个已发送SL信号，待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余COT内，且待发送SL信号的优先级高于或等于检测到的已发送SL信号的优先级。
在一实施例中，在待发送SL信号对应的传输资源的前一个时机检测到满足预设条件的已发送SL信号，指的是第一通信节点在传输资源的前一个时机检测到了任意一个已发送SL信号。在实施例中，在待发送SL信号对应的传输资源的前一个时机，检测到至少一个已发送SL信号，则认为待发送SL信号所对应UE的附近已经有其他UE接入了信道，则待发送SL信号所对应UE可以采用LBT时长较短的第一种信道接入类型所对应的信道接入过程进行快速的信道接入，并且在检测到接入的信道处于空闲时，待发送SL信号所对应UE可以发送自身的SL信号。
在一实施例中，在待发送SL信号对应的传输资源的前一个时机检测到满足预设条件的已发送SL信号，指的是第一通信节点在传输资源的前一个时机，检测到至少一个已发送SL信号，且待发送SL信号的传输资源的时域长度在X个符号之内。待发送SL信号的传输资源的时域长度在短信号所对应的符号数量之内。其中，X为大于2且小于7的正整数。
在一实施例中，在待发送SL信号对应的传输资源的前一个时机检测到满足预设条件的已发送SL信号，指的是在传输资源的前一个时机，检测到至少一个已发送SL信号，且待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余信道占用时长COT内。在实施例中，在待发送SL信号对应的UE检测到指示剩余COT的已发送SL信号，若待发送SL信号的传输资源在剩余COT内，则待发送SL信号对应的UE可以共享剩余COT时长，以使待发送SL信号对应的UE使用较短的第一种信道接入类型所对应的信道接入过程进行快速的信道接入，并且，待发送SL信号对应的UE检测到所接入的信道处于空闲时，待发送SL信号对应的UE可以发送自身的SL信号。
在一实施例中，在待发送SL信号对应的传输资源的前一个时机检测到满足预设条件的已发送SL信号，指的是在传输资源的前一个时机，检测到至少一个已发送SL信号，待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余COT内，且待发送SL信号的优先级高于或等于检测到的已发送SL信号的优先级。在实施例中，在待发送SL信号对应的UE检测到指示剩余COT的已发送SL信号，若待发送SL信号的传输资源在剩余COT内，则已发送SL信号对应的UE可以共享剩余COT时长，以使待发送SL信号对应的UE使用较短的第一种信道接入类型所对应的信道接入过程进行快速的信道接入，并且，待发 送SL信号对应的UE检测到所接入的信道处于空闲时，待发送SL信号对应的UE可以发送自身的SL信号。在实施例中，在待发送SL信号对应的UE在传输资源的前一个时机检测到了具有相同优先级的其它SL UE的已发送SL信号占用了信道，并且共享的剩余COT包含了待发送SL信号对应UE的传输资源时，待发送SL信号对应的UE采用第一种信道接入类型所对应的信道接入过程进行信道接入。
在一实施例中，在检测到的至少一个已发送SL信号对应的剩余COT为至少两个的情况下，已发送SL信号指示的剩余COT包括下述之一：
所有剩余COT中最长的或最短的剩余COT；检测到的与待发送SL信号的优先级相等的已发送SL信号所对应的剩余COT中最长的或最短的剩余COT；检测到的与待发送SL信号的优先级相等或低于的已发送SL信号所对应的剩余COT中最长的或最短的剩余COT。
在一实施例中，已发送SL信号还满足下述条件之一：已发送SL信号的功率超过检测门限；或者，已发送SL信号的功率超过已发送SL信号的优先级所对应的检测门限。在实施例中，已发送SL信号可以配置不同的优先级，即是否满足预设条件的检测门限是不同的。示例性地，若检测到一个低优先级的已发送SL信号，则这个低优先级的已发送SL信号的功率超过检测门限Y1时，即可认为检测到的该已发送SL信号是有效的；而对于一个高优先级的已发送SL信号，则这个高优先级的已发送SL信号的功率超过检测门限Y2时，即可认为该已发送SL信号是有效的。不同优先级对应的检测门限是不同的。其中，检测门限Y1和检测门限Y2是不同的。
在一实施例中，已发送SL信号还满足下述条件之一：已发送SL信号指示了待发送SL信号所对应UE的标识；或者，待发送SL信号所对应UE是已发送SL信号指示的一组UE中的一个。
在一实施例中，检测到一个已发送SL信号，还包括：
获取已发送SL信号携带的边链路控制信息SCI；或者，获取已发送SL信号的类型。
在一实施例中，待发送SL信号的类型至少包括下述之一：物理边链路控制信道PSCCH，物理边链路共享信道PSSCH，物理边链路反馈信道PSFCH，边链路同步信号S-SSB，边链路信道状态信息参考信号(SideLike-Channel State Information Reference Signal，SL CSI-RS)，边链路定位参考信号(SideLink-Positioning Reference Signal，SL PRS)。
在一实施例中，待发送SL信号，或者，填充信号和待发送SL信号均至少 包括下述之一：携带待发送SL信号的优先级指示；携带剩余COT的指示；携带是否发送填充信号的指示。
在一实施例中，携带剩余COT的指示包括下述之一：
检测到的已发送SL信号指示的剩余COT与待发送SL信号所占用传输资源的时长之间的差值；待发送SL信号的优先级所对应的剩余COT；为零。
在一实施例中，待发送SL信号对应的优先级包括下述之一：待发送SL信号的信道接入优先等级CAPC；待发送SL信号携带的临近服务每分组优先级(ProSe Per-Packet Priority，PPPP)。
在一实施例中，前一个时机与待发送SL信号对应的传输资源在同一个时隙内，或者，前一个时机在待发送SL信号对应的传输资源所属时隙的前一个时隙。
在一实施例中，传输资源的确定方式包括下述之一：
基于第二通信节点的调度，确定待发送SL信号对应的传输资源；自主在资源池中选择待发送SL信号对应的传输资源；基于第二通信节点的配置，确定待发送SL信号对应的传输资源；基于关联SL信号确定待发送SL信号对应的传输资源。
在一实施例中，图3是本申请实施例提供的另一种信道接入方法的流程图。本实施例可以由信道接入设备执行。其中，信道接入设备可以为第二通信节点。第二通信节点可以为网络侧，或者基站侧。如图3所示，本实施例包括S310。
S310、配置每个SL信号类型所对应的SL信号的至少一个传输资源或传输资源池，以使第一通信节点采用传输资源或传输资源池中的传输资源进行SL信号的传输。
在实施例中，第二通信节点对每个SL信号类型所对应的SL信号的至少一个传输资源或传输资源池进行配置，并将传输资源或传输资源池的配置信息发送至第一通信节点，以使第一通信节点采用接收到的传输资源或传输资源池中的传输资源进行SL信号的传输。
在一实施例中，传输资源或传输资源池的配置信息包括下述至少之一：
每个SL信号类型所对应的SL信号在资源池中的资源位置以及对应的信道接入类型；每个SL信号类型所对应的SL信号对应的信道接入优先等级；SL信号的信道接入优先等级CAPC与SL信号的PPPP之间的映射关系。
在一实施例中，SL信号类型包括下述之一：PSCCH，PSSCH，PSFCH，S-SSB，SL CSI-RS，SL PRS；信道接入类型包括下述之一：第一信道接入类型；第二信 道接入类型；其中，第一信道接入类型所对应的信道接入过程进行的LBT的时长是一个定值；第二信道接入类型所对应的信道接入过程进行的LBT的时长是一个随机值或定值。
信道接入过程为在一个要进行的传输之前进行LBT过程，该LBT过程对应一个网络配置的随机或确定的LBT时长。本申请实施例中的信道接入方法，首先在要进行的传输的前一个时机进行SL信号检测，根据检测结果再确定进行的信道接入和信号发送方案。见下述实施例的描述。
在一个实施例中，在传输资源的前一个时机进行SL信号检测，所述传输资源的前一个时机可以是一个用于PSCCH，PSSCH，PSFCH，S-SSB，SL CSI-RS，SL PRS或者上述的组合的一个时机。在一个实例中，所述传输资源和前一个时机在物理时间上是相邻的。前一时机可以和传输资源在同一个物理时隙内，或者在传输资源所属时隙的前一个物理时隙。前一个时机可以和传输资源在同一个资源池内，也可以属于不同的资源池。
在一实施例中，图4是本申请实施例提供的一种信道接入过程的接入示意图。在实施例中，UE在发送SL信号之前执行上述实施例中的第二种信道接入类型所对应的信道接入过程(例如使用Type 1 channel access procedure，或者，Type 2 channel access procedure)；在另一个实施例中，当UE在要进行的发送SL信号所对应传输资源的前一个时机检测到了满足预设条件的已发送SL信号，则使用第一种信道接入类型(例如Type 2 channel access procedure)接入信道。在下述实例中描述填充信号的发送。
一种实例中，UE在前一个时机中检测到了已发送SL信号，且该已发送SL信号的末尾还包括填充信号(填充信号也可以称之为扩展信号，后续统一称之为填充信号)，则UE可以在检测到的已发送SL信号的填充信号之后，在要发送的SL信号(即上述实施例中的待发送SL信号)之前进行LBT信道接入过程，如图4中间隔的构成示例2所示。一种实例中，基站或者网络可以在配置SL资源或者SL资源池时，配置是否使能SL信号的末尾发送填充信号。在一种实例中填充信号的长度是预定义的，或者由基站或者网络配置的。在一种实例中，检测到的SL信号指示了是否发送了填充信号。在一种实例中，检测到的SL信号还指示了发送的填充信号的长度。
一种实例中，UE在前一个时机中检测到了已发送SL信号，UE在上述信道接入成功后，进行信号发送，UE在发送SL信号的头部先发送填充信号，如图4中间隔的构成示例1所示。例如在前一个时隙中有其他UE发送了数据包PSCCH/PSSCH，按照SL的帧结构，上述发送资源之前和前一个时机之间有一 个间隔(Guard Period，GP)，长度可以为一个符号，由于一个符号的长度较长，其他网络的设备可以在空闲的GP内认为信道空闲，从而将信道抢占，从而造成要发送的SL信号(待发送SL信号)无法发送。为了防止这种情况，UE可以在上一时机的数据包发送完成后，开始使用上述Type 2信道接入类型进行信道接入，并且在探测信道空闲后，先发送填充信号然后发送待发送SL信号，从而缩短了GP的长度，避免了其他设备抢占信道。在一种实例中，基站或者网络可以在配置SL资源或者SL资源池时，配置是否使能在SL信号头部发送填充信号。在一种实例中填充信号的长度是预定义的，或者由基站或者网络配置的。在一种实例中，UE还可以在待发送SL信号的末尾发送填充信号，并且在待发送SL信号中还可以指示是否发送了填充信号，还可以指示填充信号的长度。
在一种实例中，填充信号可以是特定序列组成的信号，例如各种参考信号，还可以是正常的或者截短的数据或者控制信道的信号，又或者是频域梳状发送的信号，又或者是扩展的循环前缀信号，即不限制填充信号的格式。
如上述实施例中的描述，UE在LBT判定信道空闲时，可以只发送待发送SL信号，也可以在待发送SL信号的头部，和/或，待发送SL信号的尾部发送填充信号。
在一实施例中，UE在发送SL信号之前执行上述实施例中的第二种信道接入类型所对应的信道接入过程(例如使用Type 1 channel access procedure)；在另一个实施例中，当UE在要进行的发送SL信号所对应传输资源的前一个时机检测到了满足预设条件的已发送SL信号，则使用第一种信道接入类型(例如Type 2 channel access procedure)接入信道。在下述实例中描述检测到满足预设条件的已发送SL信号。
在一个实例中，UE在待发送SL信号所对应传输资源的前一个时机检测到了满足预设条件的已发送SL信号是指，UE在传输资源的前一个时机检测到了任意已发送SL信号。例如，检测到任意已发送SL信号，则认为附近已经有其他UE(已发送SL信号对应的UE)接入了信道，则UE可以使用LBT时长较短的第一种信道接入类型进行快速的信道接入，如果接入信道之后检测到信道处于空闲，则UE可以发送自身的SL信号(即待发送SL信号)。例如，在待发送SL信号是较短的SL信号(时域长度在X个符号之内，其中，X为大于2且小于7的正整数，例如SL PRS，SL PSFCH，SL CSI-RS等)，这些短信号的资源一般和前一个时机的资源属于同一个时隙，或者特殊的SL信号(同步信号，发现信号等)时，可以使用该规则。
在一个实例中，UE在待发送SL信号所对应传输资源的前一个时机检测到 了满足预设条件的已发送SL信号是指，UE在传输资源的前一个时机检测到了已发送SL信号，检测的已发送SL信号指示了剩余COT，且待发送SL信号的传输资源在剩余COT之内。例如UE检测到上述指示了剩余COT时长的已发送SL信号，如果UE对待发送SL信号的发送在剩余COT之内，则UE可以共享剩余COT并且可以使用较短的第一种信道接入类型进行快速的信道接入，如果接入信道之后，检测到该信道空闲，则UE可以发送自身的SL信号。一个实例中，UE在发送自身的SL信号时，保证在剩余COT时长内完成传输。在实施例中，还对COT共享进行了限制，例如，协议预定义或者基站/网络配置了COT的时长有最大限制，这样可以避免SL UE占用信道的时间过长。只有当UE在传输资源的前一个时机检测到了其他SL UE占用了信道，并且共享的剩余COT涵盖了UE的发送时，UE可以使用第一种信道接入类型，否则如果剩余COT太短或者为0，UE仍使用第二种信道接入类型进行信道接入。
在一种实例中，UE在待发送SL信号所对应传输资源的前一个时机检测到了满足预设条件的已发送SL信号是指，在传输资源的前一个时机，检测到至少一个已发送SL信号，待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余COT内，且待发送SL信号的优先级等于检测到的已发送SL信号的优先级。例如，UE检测到上述满足预设条件的已发送SL信号，则UE可以共享剩余COT并且可以使用LBT时长较短的第一种信道接入类型进行快速的信道接入，如果接入信道后检测信道空闲，则UE可以发送自身的SL信号(即待发送SL信号)。一个实例中，UE在发送自身的SL信号时，保证在剩余COT内完成传输。在一实施例中，还可以基于优先级对COT共享进行说明，例如，协议预定义或者基站/网络配置了COT时长有最大限制，不同的优先级(例如不同的CAPC)具有不同的COT限制，这样可以让具有相同优先级的SL信号之间共享信道占用时间。只有当UE在传输资源的前一个时机检测到了具有相同优先级的其他SL UE的信号占用了信道，并且共享的剩余COT涵盖了UE的发送时，UE可以使用第一种信道接入类型，否则，UE仍使用第二种信道接入类型进行信道接入。
在一个实例中，UE在待发送SL信号所对应传输资源的前一个时机检测到了满足预设条件的已发送SL信号是指，在传输资源的前一个时机，检测到至少一个已发送SL信号，待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余COT内，且待发送SL信号的优先级高于或等于检测到的已发送SL信号的优先级。例如，UE检测到上述满足预设条件的SL信号，则UE可以共享剩余COT并且可以使用LBT时长较短的第一种信道接入类型进行快速的信道接入，如果接入信道后检测到信道处于空闲，则UE可以发送自身的SL信号。一个实例中，UE在发送自身的SL信号时，保证在剩余COT内完成传输。在一实 施例中，还可以基于优先级对COT共享进行说明，例如，协议预定义或者基站/网络配置了COT的时长有最大限制，不同的优先级(例如不同的CAPC)具有不同的COT限制，这样可以让UE(即待发送SL信号对应的设备)共享与自身具有相同优先级，或，比自身优先级低的已发送SL信号的信道占用时间。
在一个实例中，已发送SL信号还满足下述条件之一：已发送SL信号的功率超过检测门限；或者，已发送SL信号的功率超过已发送SL信号的优先级所对应的检测门限。一个实例中，网络或者基站可以设置一个检测门限，UE检测的已发送SL信号超过检测门限，认为检测的已发送SL信号有效。在一个实例中，网络或者基站可以为每一个优先级设置一个检测门限，只有检测的已发送SL信号超过其优先级对应的检测门限，才认为检测的已发送SL信号有效。一个实例中，检测门限是指参考信号接收功率(Reference Signal Receiving Power，RSRP)检测门限，例如为针对控制或者数据信道的解调参考信号(DeModulation Reference Signal，DMRS)的检测门限。
在一个实例中，检测到了一个已发送SL信号还可以包括：获取已发送SL信号携带的边链路控制信息(Sidelink Control Information，SCI)；或者，获取已发送SL信号的类型。在实施例中，剩余COT和SL信号优先级等均可以携带在SCI中。其中，已发送SL信号的类型包括下述之一：物理边链路控制信道PSCCH，物理边链路共享信道PSSCH，物理边链路反馈信道PSFCH，边链路同步信号/物理广播信道块S-SSB，边链路信道状态信息参考信号SL CSI-RS，边链路定位参考信号SL PRS。
在一个实例中，已发送SL信号还满足下述条件之一：已发送SL信号指示了待发送SL信号所对应UE的标识；或者，待发送SL信号所对应UE是已发送SL信号指示的一组UE中的一个。在实施例中，上述UE的标识或者指示的一组UE的信息携带在SCI中。例如，只有UE是被允许进行使用剩余COT的一个UE或一组UE中的一个UE时，UE才可以使用LBT时长较短的第一种信道接入类型进行快速的信道接入。
在一实施例中，检测的已发送SL信号指示的剩余COT指的是，在检测到的已发送SL信号携带的SCI中指示了剩余COT。
在一个实例中，剩余COT指示了剩余COT包含的时隙个数。例如，可以指示剩余时隙的计数器，当计数器或计时器为0时，表示COT已经结束或者不进行COT的共享。在一个实例中，网络或者基站可以配置是否开启COT共享，这种配置可以是每个资源池或者每组资源进行配置的。在一个实例中，UE也可以选择关闭COT共享，例如UE可以在已发送SL信号中不指示剩余COT或者 将指示的剩余COT设为0。
在一个实例中，在检测到的已发送SL信号指示的剩余COT为多个的情况下，检测到的已发送SL信号指示的剩余COT时长是指，多个剩余COT中最长的或最短的剩余COT。例如，UE可以在传输资源的前一个时机检测到多个UE发送的已发送SL信号，其中携带的剩余COT可以为多个。一个实例中，若使用较为保守的方法，UE的传输需要在所有指示的剩余COT之内，即需要在最短的剩余COT之内；一个实例中，若使用较为激进的方法，UE的传输只需要在最长的剩余COT之内即可。
在一个实例中，在检测到的已发送SL信号指示的剩余COT为多个的情况下，在确定检测的已发送SL信号指示的剩余COT时，确定检测到的已发送SL信号的优先级以及待发送SL信号的优先级。在一个实例中，UE可以共享与待发送SL信号的优先级相同的剩余COT。例如，在检测的已发送SL信号中可以包含与待发送SL信号具有相同优先级的SL信号，这些UE发送的SL信号在这些相同优先级的已发送SL信号指示的最长或者最短的剩余COT之内。
在一个实例中，在检测到的已发送SL信号指示的剩余COT为多个的情况下，在确定检测的已发送SL信号指示的剩余COT，UE可以共享与待发送SL信号优先级相同的，或者，比待发送SL信号优先级更低的剩余COT。例如，在检测的已发送SL信号中可以包含与待发送SL信号具有相同优先级的已发送SL信号，和/或，比待发送SL信号的优先级更低的已发送SL信号，UE发送的待发送SL信号在这些相同或更低优先级的已发送SL信号指示的最长或者最短的剩余COT之内。
在一个实例中，若UE执行上述第二种信道接入类型并接入信道，其携带的剩余COT为待发送SL信号的优先级对应的COT时长。例如，UE未检测到满足预设条件的已发送SL信号，则UE使用第二信道接入类型所对应的信道接入过程进行接入并成功，此时UE开启一个COT，则剩余COT由UE根据自身发送信号的优先级进行设置。
在一个实例中，若UE执行上述第一种信道接入类型并接入信道，其携带的剩余COT时长为检测的已发送SL信号指示的剩余COT减去UE所对应的待发送SL信号占用的时长。例如，UE检测到满足预设条件的已发送SL信号，则UE使用第一信道接入类型所对应的信道接入过程进行接入并成功，此时可以认为UE共享了其他UE开启的一个COT，UE自身未开启新的COT，则发送的待发送SL信号携带的剩余COT为检测的已发送SL信号指示的剩余COT减去UE所发送的待发送SL信号占用的时长。
在一个实例中，若UE执行上述第一信道接入类型或第二种信道接入类型并 接入信道，其不携带剩余COT的指示，或携带的剩余COT设为0。例如，UE关闭COT共享。
在一实施例中，不同的待发送SL信号对应不同的优先级。在一个实例中，待发送SL信号的优先级可以为PPPP。例如，对于每个待发送SL信号所对应的SL数据包(PSCCH/PSSCH)，根据其业务属性，可以绑定一个PPPP，其值为1～8，值越小代表优先级越高，即优先级高，也可以等效为优先级序号小或者低。对于一些特殊的待发送SL信号，例如S-SSB，PSFCH，SL PRS等，需要额外确定其对应的PPPP，一个实例中，待发送SL信号的PPPP可以由基站或者网络进行配置，例如S-SSB，PSFCH，SL PRS的优先级。在一个实例中，待发送SL信号的优先级由触发或关联该信号的其他SL信号的PPPP确定。例如，PSFCH的PPPP设置为其应答的SL数据包所使用的PPPP，SL PRS的PPPP，也和其关联的SL数据包(PSCCH/PSSCH)相同。
在一个实例中，待发送SL信号的优先级可以为CAPC。例如，对于每个待发送SL信号对应的SL数据包(PSCCH/PSSCH)，根据其业务属性，可以绑定一个CAPC，其值为1～4，值越小代表优先级越高，即优先级高，也可以等效为优先级序号小或者低。
在一个实例中，待发送SL信号的优先级可以为CAPC，并且PPPP与CAPC之间有映射关系。例如，每个PPPP对应4个CAPC的一个，高优先级的PPPP对应高优先级的CAPC。例如，对于每个待发送SL信号对应的SL数据包(PSCCH/PSSCH)，根据其业务属性，可以绑定一个PPPP，然后根据PPPP与CAPC的映射关系可以确定数据包的CAPC。
在一个实例中，待发送SL信号的优先级可以为CAPC。例如对于一些特殊的待发送SL信号，例如S-SSB，PSFCH，SL PRS等，需要额外确定其对应的CAPC。一个实例中，待发送SL信号的CAPC可以由基站或者网络进行配置，或者协议预定义，例如S-SSB，PSFCH，SL PRS的CAPC由配置决定。在一个实例中，待发送SL信号的优先级由触发或关联该信号的其他SL信号的CAPC确定。例如，PSFCH的CAPC设置为其应答的SL数据包所使用的CAPC，SL PRS的CAPC也和其关联的SL数据包(PSCCH/PSSCH)相同。一个实例中，待发送SL信号的PPPP可以由基站或者网络进行配置，例如S-SSB，PSFCH，SL PRS的PPPP，根据映射关系可以确定CAPC。在一个实例中，待发送SL信号的PPPP由触发或关联该信号的其他SL信号的PPPP确定，然后根据映射关系可以确定这些信号的CAPC。
在一实施例中，UE在进行待发送SL信号的传输之前，首先确定待发送SL信号对应的传输资源。在实施例中，传输资源的获取确定方式包括下述之一： 基于第二通信节点的调度，确定待发送SL信号对应的传输资源；自主在资源池中选择待发送SL信号对应的传输资源；基于第二通信节点的配置，确定待发送SL信号对应的传输资源；基于关联SL信号确定待发送SL信号对应的传输资源。
在实施例中，传输资源的确定方式如下：
一个实例中，UE基于基站或者中心节点(例如组头节点)的调度，确定待发送SL信号对应的传输资源。例如，基站或者中心节点为UE分配或者调度特定的传输资源。
一个实例中，UE自主的在资源池中选择待发送SL信号对应的传输资源。在实施例中，UE可以随机的，基于sensing或者partial sensing在资源池中选择待发送SL信号对应的传输资源。
一个实例中，UE基于基站或者网络的配置，确定待发送SL信号对应的传输资源。例如，S-SSB的资源可以由网络或者基站配置。
一个实例中，UE基于其他关联的SL信号确定待发送SL信号对应的传输资源。其中，其他关联SL信号的资源与待发送SL信号之间存在确定的关联关系，例如，UE检测到发送给自身的数据包时，且该数据包要求进行反馈，则反馈使用的资源由关联的数据包确定，一般的，数据包的资源与反馈资源有确定的映射关系。一个实例中，反馈可以为PSFCH，SL PRS或者SL CSI-RS。
在一实施例中，对SL同步信号的信道接入的过程进行说明。在实施例中，网络或者基站可以配置或者预配置SL同步信号使用的资源，在每个载波或者每个载波的每个带宽部分(BandWidth Part，BWP)上周期的配置一组或多组SL同步信号的资源。另外，网络或基站还可以配置同步信号的信道接入优先级，例如配置S-SSB的CAPC，或者S-SSB可以是任意CAPC，可以和任意优先级的SL信号进行COT共享，以便和其他SL信号进行COT共享。以S-SSB作为同步信号为例进行说明。
一组S-SSB的资源可以包括多个S-SSB资源，每个S-SSB资源可以看作一个S-SSB发送的潜在时机(occasion)，多个S-SSB资源可以是时间上连续分布的，或者离散分布的；一个S-SSB资源可以在时间上占用一个时隙或者一个时隙上的若干符号。一个时隙上也可以包括多个S-SSB资源。UE可在这些S-SSB资源上发送S-SSB同步信号。
在实施例中，可以预定义S-SSB的信道接入方式，或者直接配置为Type 2A类型，LBT时长为25us(25微秒)。除了进行传统的LBT之外，UE可以在一个S-SSB发送资源的前一个时机进行已发送SL信号的检测，例如，待发送SL 信号所对应传输资源的前一个时机可以是上一个时隙中的PSCCH/PSSCH资源，或PSFCH资源等，或者，与S-SSB在同一个时隙的上一个S-SSB资源。
在一个实例中，UE在发送S-SSB之前执行Type 2A信道接入(上述第二种信道接入类型)；在另一个实例中，在UE发送S-SSB的前一个时机检测到了已发送SL信号，则使用Type 2B或者Type 2C接入信道(第一种信道接入类型)，即对应的LBT时长变为16us。
在实施例中，在UE采用第一信道接入类型或第二信道类型进行信道接入的情况下，UE可以使用上述实施例中的其中一种或组合进行S-SSB的信道接入和发送。
在一个实例中，若在前一个时机检测到了已发送SL信号，UE就可以使用Type 2A/2B/2C进行S-SSB的发送。其中，S-SSB是特殊信号，可以不考虑剩余COT的限制。在一个实例中S-SSB中携带剩余COT的指示，或者剩余COT为0。
在一实例中，S-SSB可以共享所有优先级的COT，同样的为了实现COT共享，需要在S-SSB增加剩余COT的指示。
在一实施例中，对Sidelink数据的信道接入的过程进行说明。在实施例中，网络或者基站可以配置或者预配置SL数据通信使用的资源池，在每个载波或者每个载波的每个BWP上配置用于SL数据通信的一个或多个发送资源池或者接收资源池。在一个资源池中，除了配置SL数据通信使用的控制信道和数据信道的资源以外，还可以配置反馈信道的资源，例如PSFCH的资源，也可以配置SL参考信号的资源，例如SL PRS的资源。
在实施例中，PSCCH和PSSCH是可以一起发送的，其信道接入过程也是一起的。UE可以使用上述实施例中的信道接入方案进行PSCCH和PSSCH的信道接入和发送。
在一个实例中，UE在发送PSCCH/PSSCH之前执行Type 1信道接入过程(上述第二种信道接入类型)，不同的数据优先级对应不同参数的Type 1信道接入过程；在另一个实例中，在UE在发送PSCCH/PSSCH的前一个时机检测到了满足预设条件的已发送SL信号，则使用Type 2A，Type 2B或者Type 2C接入信道(第一种信道接入类型)，即对应的LBT时长变为确定值。
在实施例中，数据信道的接入对COT共享时长进行限制。在一实施例中，还可以配置待发送SL信号的优先级。
在一个实例中，图5是本申请实施例提供的一种满足预设条件的已发送SL信号的组成示意图，如图5所示，UE检测到满足预设条件的已发送SL信号的 时机，即所述前一个时机，为一个包含PSCCH/PSSCH时机与PSFCH时机的组合时隙或组合时机。如上述实例所述，UE在传输资源的前一个时隙中检测PSCCH/PSSCH信号，如果有必要，检测其中包含的优先级指示和/或剩余COT的指示。在一个实例中，UE除了检测PSCCH/PSSCH中包含的优先级指示和/或剩余COT的指示，UE还需要检测PSFCH信号，若PSFCH存在，则UE使用第一种信道接入类型，否则UE使用第二种信道接入类型。在一个实例中，上述PSFCH也可以是其他SL信号，例如SL PRS等参考信号。
在一实施例中，针对SL反馈信道参考信号的信道接入，以PSFCH为例进行说明，本实施例中的方案适用于其他SL信道或者SL参考信号(例如SL PRS)。
在实施例中，网络或者基站可以配置或者预配置SL通信使用的资源池，在每个载波或者每个载波的每个BWP上配置用于SL通信的一个或多个发送资源池或者接收资源池。在一个资源池中，除了配置SL通信使用的控制信道和数据信道的资源以外，还可以配置反馈信道的资源，例如PSFCH的资源，也可以配置SL参考信号的资源，例如SL PRS的资源。
在实施例中，UE默认使用Type 1信道接入(上述第二种信道接入类型)发送PSFCH，如上不同的数据优先级对应不同参数的Type 1信道接入；但是PSFCH不是数据信道，没有直接的优先级。在一个实例中，PSFCH与其关联的要进行反馈的PSCCH/PSSCH的优先级相同。或者，PSFCH使用协议预定义的优先级，例如PSFCH持续时间短，可以预定义使用最高优先级的CAPC接入信道，又或者，PSFCH使用网络或者基站配置的优先级。
一个PSFCH资源或者时机可以在一个时隙内占用若干个符号(例如2个符号)，在同一个时隙内还可以存在其他SL信号的资源或时机，例如，还可以存在PSCCH/PSSCH资源，如图5所示。一个PSFCH资源的前一个时机可以为同一个时隙内的其他SL信号资源，例如同一个时隙中的PSCCH/PSSCH资源。
一个实例中，UE在发送PSFCH之前执行Type 1信道接入(上述第二种信道接入类型)；在另一个实例中，当UE在发送PSFCH的前一个时机检测到了已发送SL信号，例如在同一个时隙中检测到了PSCCH/PSSCH，则使用Type 2A，2B或者Type 2C接入信道(第一种信道接入类型)，即对应的LBT时长变为确定值。在实施例中，在前一个时机检测到了已发送SL信号，UE就可以使用Type 2A/2B/2C进行PSFCH的发送。PSFCH的信号较短，且在一个时隙内，如果在同一个时隙检测到了其他SL信号，可以使用较短LBT时长的信道接入方法。此时不考虑剩余COT的限制。
实施例中，在UE采用第一信道接入类型或第二信道类型进行信道接入的情况下，UE可以使用上述实施例中的其中一种或组合进行PSFCH，SL-PRS等信号的信道接入和发送。
在一实施例中，图6是本申请实施例提供的一种信道接入装置的结构框图。本实施例应用于第一通信节点。如图6所示，本实施例包括：确定模块610和第一接入模块620。
确定模块610，配置为确定待发送SL信号对应的传输资源；第一接入模块620，配置为在传输资源的前一个时机检测到满足预设条件的已发送SL信号的情况下，采用第一信道接入类型进行信道接入；其中，第一信道接入类型所对应的信道接入过程进行探测的时长是一个定值。
在一实施例中，应用于第一通信节点的信道接入装置，还包括：
第二接入模块，配置为在传输资源的前一个时机未检测到满足预设条件的已发送SL信号的情况下，采用第二信道接入类型进行信道接入；其中，第二信道接入类型所对应的信道接入过程进行探测的时长是一个随机值或定值。
在一实施例中，在采用第一信道接入类型或第二信道接入类型进行信道接入，并且在探测的时长内探测到所接入的信道处于空闲的情况下，发送待发送SL信号，或者，发送填充信号和待发送SL信号。
在一实施例中，在检测到满足预设条件的已发送SL信号的情况下，若第二信道接入类型所对应的信道接入过程已经开始，则将当前信道接入切换为第一信道接入类型。
在一实施例中，检测到满足预设条件的已发送SL信号包括下述之一：
在传输资源的前一个时机，检测到至少一个已发送SL信号；在传输资源的前一个时机，检测到至少一个已发送SL信号，且待发送SL信号的传输资源的时域长度在X个符号之内，其中，X为大于2且小于7的正整数；在传输资源的前一个时机，检测到至少一个已发送SL信号，且待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余信道占用时长COT内；在传输资源的前一个时机，检测到至少一个已发送SL信号，待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余COT内，且待发送SL信号的优先级高于或等于检测到的已发送SL信号的优先级。
在一实施例中，在检测到的至少一个已发送SL信号对应的剩余COT为至少两个的情况下，已发送SL信号指示的剩余COT包括下述之一：
所有剩余COT中最长的或最短的剩余COT；检测到的与待发送SL信号的优先级相等的已发送SL信号所对应的剩余COT中最长的或最短的剩余COT；检测到的与待发送SL信号的优先级相等或低于的已发送SL信号所对应的剩余COT中最长的或最短的剩余COT。
在一实施例中，已发送SL信号还满足下述条件之一：已发送SL信号的功率超过检测门限；或者，已发送SL信号的功率超过已发送SL信号的优先级所对应的检测门限。
在一实施例中，检测到一个已发送SL信号，还包括：
获取已发送SL信号携带的边链路控制信息SCI；或者，获取已发送SL信号的类型。
在一实施例中，待发送SL信号的类型至少包括下述之一：物理边链路控制信道PSCCH，物理边链路共享信道PSSCH，物理边链路反馈信道PSFCH，边链路同步信号S-SSB，边链路信道状态信息参考信号SL CSI-RS，边链路定位参考信号SL PRS。
在一实施例中，待发送SL信号，或者，填充信号和待发送SL信号均至少包括下述之一：携带待发送SL信号的优先级指示；携带剩余COT的指示；携带是否发送填充信号的指示。
在一实施例中，携带剩余COT的指示包括下述之一：
检测到的已发送SL信号指示的剩余COT与待发送SL信号所占用传输资源的时长之间的差值；待发送SL信号的优先级所对应的剩余COT；为零。
在一实施例中，待发送SL信号对应的优先级包括下述之一：待发送SL信号的信道接入优先等级CAPC；待发送SL信号携带的PPPP。
在一实施例中，前一个时机与待发送SL信号对应的传输资源在同一个时隙内，或者，前一个时机在待发送SL信号对应的传输资源所属时隙的前一个时隙。
在一实施例中，传输资源的确定方式包括下述之一：
基于第二通信节点的调度，确定待发送SL信号对应的传输资源；自主在资源池中选择待发送SL信号对应的传输资源；基于第二通信节点的配置，确定待发送SL信号对应的传输资源；基于关联SL信号确定待发送SL信号对应的传输资源。
本实施例提供的信道接入装置设置为实现图2所示实施例的应用于第一通信节点的信道接入方法，本实施例提供的信道接入装置实现原理和技术效果类似，此处不再赘述。
在一实施例中，图7是本申请实施例提供的另一种信道接入装置的结构框图。本实施例应用于第二通信节点。如图7所示，本实施例包括：配置器710。
配置器710，配置为配置每个SL信号类型所对应的SL信号的至少一个传输资源或传输资源池，以使第一通信节点采用传输资源或传输资源池中的传输资源进行SL信号的传输。
在一实施例中，传输资源或传输资源池的配置信息包括下述至少之一：
每个SL信号类型所对应的SL信号在资源池中的资源位置以及对应的信道接入类型；每个SL信号类型所对应的SL信号对应的信道接入优先等级；SL信号的信道接入优先等级CAPC与SL信号的PPPP之间的映射关系。
在一实施例中，SL信号类型包括下述之一：物理边链路控制信道PSCCH，物理边链路共享信道PSSCH，物理边链路反馈信道PSFCH，边链路同步信号S-SSB，边链路信道状态信息参考信号SL CSI-RS，边链路定位参考信号SL PRS；信道接入类型包括下述之一：第一信道接入类型；第二信道接入类型；其中，第一信道接入类型所对应的信道接入过程进行的LBT的时长是一个定值；第二信道接入类型所对应的信道接入过程进行的LBT的时长是一个随机值或定值。
本实施例提供的信道接入装置设置为实现图3所示实施例的应用于第二通信节点的信道接入方法，本实施例提供的信道接入装置实现原理和技术效果类似，此处不再赘述。
图8是本申请实施例提供的一种信道接入设备的结构示意图。如图8所示，本申请提供的设备，包括：处理器810、存储器820和通信模块830。该设备中处理器810的数量可以是一个或者多个，图8中以一个处理器810为例。该设备中存储器820的数量可以是一个或者多个，图8中以一个存储器820为例。该设备的处理器810、存储器820和通信模块830可以通过总线或者其他方式连接，图8中以通过总线连接为例。在该实施例中，该信道接入设备为可以为第一通信节点，其中，第一通信节点可以为终端侧(比如，用户设备)。
存储器820作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请任意实施例的设备对应的程序指令/模块(例如，信道接入装置中的确定模块610和第一接入模块620)。存储器820可包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据设备的使用所创建的数据等。此外，存储器820可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储器820可包括相对于处理器810远程设置的存储器，这些远程存储 器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
通信模块830，配置为用于在第一通信节点和第二通信节点之间进行通信交互。
在信道接入设备为第一通信节点的情况下，上述提供的设备可设置为执行上述任意实施例提供的应用于第一通信节点的信道接入方法，具备相应的功能和效果。
在信道接入设备为第二通信节点的情况下，上述提供的设备可设置为执行上述任意实施例提供的应用于第二通信节点的信道接入方法，具备相应的功能和效果。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种应用于第一通信节点的信道接入方法，该方法包括：确定待发送SL信号对应的传输资源；在传输资源的前一个时机检测到满足预设条件的已发送SL信号的情况下，采用第一信道接入类型进行信道接入；其中，第一信道接入类型所对应的信道接入过程进行探测的时长是一个定值。
本申请实施例还提供一种包含计算机可执行指令的存储介质，计算机可执行指令在由计算机处理器执行时用于执行一种应用于第二通信节点的信道接入方法，该方法包括：配置每个SL信号类型所对应的SL信号的至少一个传输资源或传输资源池，以使第一通信节点采用传输资源或传输资源池中的传输资源进行SL信号的传输。
本领域内的技术人员应明白，术语用户设备涵盖任何适合类型的无线用户设备，例如移动电话、便携数据处理装置、便携网络浏览器或车载移动台。
一般来说，本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如，一些方面可以被实现在硬件中，而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中，尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现，例如在处理器实体中，或者通过硬件，或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture，ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序步骤，或者可以表示相 互连接的逻辑电路、模块和功能，或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现，例如但不限于只读存储器(Read-Only Memory，ROM)、随机访问存储器(Random Access Memory，RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc，DVD)或光盘(Compact Disk，CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型，例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processing，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、可编程逻辑器件(Field-Programmable Gate Array，FPGA)以及基于多核处理器架构的处理器。

Claims (19)

  1. 一种信道接入方法，应用于第一通信节点，包括：
    确定待发送边链路SL信号对应的传输资源；
    在所述传输资源的前一个时机检测到满足预设条件的已发送SL信号的情况下，采用第一信道接入类型进行信道接入；其中，所述第一信道接入类型所对应的信道接入过程进行探测的时长是一个定值。
  2. 根据权利要求1所述的方法，还包括：
    在所述传输资源的前一个时机未检测到满足所述预设条件的已发送SL信号的情况下，采用第二信道接入类型进行信道接入；其中，所述第二信道接入类型所对应的信道接入过程进行探测的时长是一个随机值或定值。
  3. 根据权利要求1或2所述的方法，还包括：
    在采用所述第一信道接入类型或所述第二信道接入类型进行信道接入，并且在探测的时长内探测到所接入的信道处于空闲的情况下，发送所述待发送SL信号，或者，发送填充信号和所述待发送SL信号。
  4. 根据权利要求1所述的方法，还包括：
    在检测到满足所述预设条件的已发送SL信号的情况下，且第二信道接入类型所对应的信道接入过程已经开始的情况下，将当前信道接入切换为所述第一信道接入类型。
  5. 根据权利要求1或2所述的方法，其中，所述检测到满足预设条件的已发送SL信号包括下述之一：
    在所述传输资源的前一个时机，检测到至少一个已发送SL信号；
    在所述传输资源的前一个时机，检测到至少一个已发送SL信号，且所述待发送SL信号的传输资源的时域长度在X个符号之内，其中，X为大于2且小于7的正整数；
    在所述传输资源的前一个时机，检测到至少一个已发送SL信号，且所述待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余信道占用时长COT内；
    在所述传输资源的前一个时机，检测到至少一个已发送SL信号，所述待发送SL信号的传输资源在检测到的已发送SL信号指示的剩余COT内，且所述待发送SL信号的优先级高于或等于检测到的已发送SL信号的优先级。
  6. 根据权利要求5所述的方法，其中，在检测到的至少一个已发送SL信号对应的剩余COT为至少两个的情况下，所述已发送SL信号指示的剩余COT包 括下述之一：
    所有剩余COT中最长的或最短的剩余COT；
    检测到的与所述待发送SL信号的优先级相等的已发送SL信号所对应的剩余COT中最长的或最短的剩余COT；
    检测到的与所述待发送SL信号的优先级相等或较低的已发送SL信号所对应的剩余COT中最长的或最短的剩余COT。
  7. 根据权利要求5所述的方法，其中，所述已发送SL信号还满足下述条件之一：所述已发送SL信号的功率超过检测门限；所述已发送SL信号的功率超过所述已发送SL信号的优先级所对应的检测门限。
  8. 根据权利要求1所述的方法，其中，检测到一个已发送SL信号，包括：
    获取所述已发送SL信号携带的边链路控制信息SCI；或者，获取所述已发送SL信号的类型。
  9. 根据权利要求1或2所述的方法，其中，所述待发送SL信号的类型至少包括下述之一：物理边链路控制信道PSCCH，物理边链路共享信道PSSCH，物理边链路反馈信道PSFCH，边链路同步信号/物理广播信道块S-SSB，边链路信道状态信息参考信号SL CSI-RS，边链路定位参考信号SL PRS。
  10. 根据权利要求3所述的方法，其中，所述待发送SL信号，或者，所述填充信号和所述待发送SL信号均至少包括下述之一：携带所述待发送SL信号的优先级指示；携带剩余COT的指示；携带是否发送填充信号的指示。
  11. 根据权利要求10所述的方法，其中，所述携带剩余COT的指示包括下述之一：
    检测到的已发送SL信号指示的剩余COT与所述待发送SL信号所占用传输资源的时长之间的差值；
    所述待发送SL信号的优先级所对应的剩余COT；
    为零。
  12. 根据权利要求10所述的方法，其中，所述待发送SL信号对应的优先级包括下述之一：待发送SL信号的信道接入优先等级CAPC；待发送SL信号携带的临近服务每分组优先级PPPP。
  13. 根据权利要求1或2所述的方法，其中，所述前一个时机与所述待发送SL信号对应的传输资源在同一个时隙内，或者，所述前一个时机在所述待发送SL信号对应的传输资源所属时隙的前一个时隙。
  14. 根据权利要求1或2所述的方法，其中，所述传输资源的确定方式包括下述之一：
    基于第二通信节点的调度，确定所述待发送SL信号对应的传输资源；
    自主在资源池中选择所述待发送SL信号对应的传输资源；
    基于第二通信节点的配置，确定所述待发送SL信号对应的传输资源；
    基于关联SL信号确定所述待发送SL信号对应的传输资源。
  15. 一种信道接入方法，应用于第二通信节点，包括：
    配置每个边链路SL信号类型所对应的SL信号的至少一个传输资源或传输资源池，以使第一通信节点采用所述传输资源或所述传输资源池中的传输资源进行SL信号的传输。
  16. 根据权利要求15所述的方法，其中，所述传输资源或所述传输资源池的配置信息包括下述至少之一：
    每个SL信号类型所对应的SL信号在资源池中的资源位置以及对应的信道接入类型；
    每个SL信号类型所对应的SL信号对应的信道接入优先等级；
    所述SL信号的信道接入优先等级CAPC与所述SL信号的临近服务每分组优先级PPPP之间的映射关系。
  17. 根据权利要求15或16所述的方法，其中，所述SL信号类型包括下述之一：物理边链路控制信道PSCCH，物理边链路共享信道PSSCH，物理边链路反馈信道PSFCH，边链路同步信号/物理广播信道块S-SSB，边链路信道状态信息参考信号SL CSI-RS，边链路定位参考信号SL PRS；所述信道接入类型包括下述之一：第一信道接入类型；第二信道接入类型；其中，所述第一信道接入类型所对应的信道接入过程进行的发送前监听LBT的时长是一个定值；所述第二信道接入类型所对应的信道接入过程进行的LBT的时长是一个随机值或定值。
  18. 一种信道接入设备，包括：通信模块，存储器，以及至少一个处理器；
    所述通信模块，配置为在第一通信节点和第二通信节点之间进行通信交互；
    所述存储器，配置为存储至少一个程序；
    当所述至少一个程序被所述至少一个处理器执行，使得所述至少一个处理器实现如权利要求1-14或15-17中任一项所述的信道接入方法。
  19. 一种存储介质，存储有计算机程序，所述计算机程序被处理器执行时实现如上述权利要求1-14或15-17中任一项所述的信道接入方法。
PCT/CN2022/106962 2021-07-21 2022-07-21 信道接入方法、设备和存储介质 WO2023001220A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112153618A (zh) * 2020-09-23 2020-12-29 中兴通讯股份有限公司 一种确定信道资源配置的方法、通信节点及存储介质
WO2021016973A1 (zh) * 2019-07-31 2021-02-04 Oppo广东移动通信有限公司 一种信息传输方法、电子设备及存储介质
US20210058905A1 (en) * 2019-08-19 2021-02-25 Lenovo (Singapore) Pte. Ltd. Using a configured feedback resource for feedback
WO2021093893A1 (en) * 2019-11-17 2021-05-20 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Methods for channel access procedure switching

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021016973A1 (zh) * 2019-07-31 2021-02-04 Oppo广东移动通信有限公司 一种信息传输方法、电子设备及存储介质
US20210058905A1 (en) * 2019-08-19 2021-02-25 Lenovo (Singapore) Pte. Ltd. Using a configured feedback resource for feedback
WO2021093893A1 (en) * 2019-11-17 2021-05-20 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Methods for channel access procedure switching
CN112153618A (zh) * 2020-09-23 2020-12-29 中兴通讯股份有限公司 一种确定信道资源配置的方法、通信节点及存储介质

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