WO2023207718A1 - 一种资源选择的方法和装置 - Google Patents

一种资源选择的方法和装置 Download PDF

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Publication number
WO2023207718A1
WO2023207718A1 PCT/CN2023/089273 CN2023089273W WO2023207718A1 WO 2023207718 A1 WO2023207718 A1 WO 2023207718A1 CN 2023089273 W CN2023089273 W CN 2023089273W WO 2023207718 A1 WO2023207718 A1 WO 2023207718A1
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WIPO (PCT)
Prior art keywords
terminal device
resource
information
time unit
resources
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PCT/CN2023/089273
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English (en)
French (fr)
Inventor
张天虹
杨帆
黎超
黄海宁
李君瑶
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华为技术有限公司
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Publication of WO2023207718A1 publication Critical patent/WO2023207718A1/zh

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Classifications

    • 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
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present application relates to the field of communications, and more specifically, to a resource selection method and device.
  • LBT listen-before-talk
  • SL communication technology such as in new radio (NR) SL communication technology
  • NR new radio
  • the spectrum used is licensed spectrum or dedicated spectrum, and the relevant regulations of unlicensed spectrum are not considered. Therefore, , the current SL communication technology cannot be well integrated with the communication technology on the unlicensed spectrum.
  • the UE in the SL communication scenario of NR, the UE only selects resources for inter-device communication based on the resource sensing results and does not follow LBT. Therefore, when performing SL communication on the unlicensed spectrum, access channels for all types of UEs cannot be guaranteed. fairness.
  • This application provides a resource selection method and device, which can be used, for example, for communications in a sidelink on unlicensed spectrum (SL-U) scenario.
  • This method can ensure the fairness of access channels for various types of UEs by determining the resources used to transmit sidelink information based on the LBT results.
  • the first aspect provides a resource selection method, which can be executed by a terminal device, or can also be executed by a chip or chip system or circuit configured in the terminal device. This application does not limit this. For convenience of description, the following description takes execution by the first terminal device as an example.
  • the method may include: the first terminal device performs listen-before-talking LBT; the first terminal device sends sideline information in a first time unit, and the first time unit includes the time unit or the first time unit when the first terminal device successfully performs LBT. The next time unit of the time unit when a terminal device successfully executes LBT.
  • the time unit may be a time slot, for example.
  • the sidelink information may include at least one of PSCCH, PSSCH, and PSFCH.
  • PSCCH can be used to carry control information
  • PSSCH can be used to carry control information and/or data
  • PSFCH can be used to carry feedback information
  • the sidelink information includes at least one of PSCCH, PSSCH, and PSFCH. It can also be understood as sidelink information.
  • the row information includes at least one of side row data information, side row control information, and side row feedback information.
  • the first terminal device may perform LBT starting from time unit n, or perform channel access. Therefore, the first terminal device may select a resource for sending sidelink information based on the result of performing LBT. Specifically, if the LBT is successful, the first terminal device may access the channel and send sidelink information on the first time unit.
  • the first time unit includes the time slot in which the first terminal device successfully performs LBT or the time slot in which the first terminal device successfully performs LBT. The next time slot of the slot.
  • the time slot in which LBT is successful can be used to send sidelink information. For example, if the time when LBT succeeds is located at the beginning of the time slot, then the first time slot includes the time slot when LBT succeeds.
  • the time slot in which LBT is successful cannot be used to send sidelink information. For example, if the time when LBT succeeds is located in the middle of the time slot, and the time slot after this position is not enough to send sidelink information, the first time slot includes the time slot next to the time slot when LBT succeeds.
  • the first terminal device can send the sidelink information immediately after the LBT is successful, or in the time slot in which the first terminal device successfully performs the LBT or in the time slot in which the first terminal device performs the LBT successfully.
  • the sidelink information is sent in the next time slot of the first terminal device, thereby ensuring the fairness of access channels of various types of UEs, and at the same time, it is beneficial to reduce the delay of the first terminal device in sending the sidelink information.
  • the first terminal device sends sideline information in the first time unit, including: the first terminal device sends the sideline information in the first time unit and at least after the first time unit. Sidelink information is sent in one time unit.
  • the first terminal device can send multiple sidelink information after the LBT is successful.
  • the first terminal device may send the initial transmission information and at least one retransmission information on the first time unit and at least one time unit after the first time unit, wherein the plurality of sideline information includes the initial transmission information and the At least one retransmission message.
  • the method further includes: the first terminal device sending first control information on the second time unit, the first control information being used to indicate the first preset of the sideline information.
  • Reserve resources wherein the first reserved resources are resources determined by the first terminal device based on the sensing results.
  • the first terminal device may send the first control information on the second time unit.
  • the time unit in which the first terminal device sends the first control information is located after the time unit in which the first terminal device selects a resource that can be used to send sideline information according to the sensing result. Therefore, the first control information can be used to indicate Reserved resources based on sensing results, or in other words, the first reserved resources are resources determined based on sensing results.
  • the first reserved resources are resources determined based on the sensing results, or it can also be understood as, the first reserved resources do not include reserved resources of other terminal devices (for example, the second terminal device); or it can also be understood as, The first reserved resources belong to the remaining resources of the first terminal device after excluding the reserved resources of other terminal devices.
  • the first control information is used to indicate reserved resources based on the sensing results. It can also be understood that when the first terminal device indicates the reserved resources through the first control information, the first terminal device considers the reserved resources of other terminal devices, thereby avoiding the third One reserved resource collides with the reserved resources of other terminal devices.
  • the first time unit is before the first moment, then the first terminal device sends the above-mentioned first control information on the second time unit, where the first moment is when the first terminal device sends the first control information according to the sensing result.
  • the time when resources that can be used to send sidelink information are selected; or in other words, the first time is the time when the first terminal device completes processing of the sensing result.
  • the first terminal device when the first terminal device sends the sidelink information, it has not yet selected resources that can be used to send the sidelink information based on the sensing results. At this time, the first terminal device may first access the channel and send sidelink information until resources available for transmitting sidelink information are selected based on the sensing results, and then indicate the reserved resources based on the sensing results by sending first control information.
  • the first terminal device selects a time when resources can be used to send sidelink information according to the sensing result, or in other words,
  • the time for the first terminal device to process the sensing result may be predefined, or may be instructed by the network device, which is not limited by this application.
  • the first terminal device when the LBT is successful, may not have selected resources that can be used to transmit sidelink information based on the sensing results. Therefore, the first terminal device may first send the sidelink information until the sidelink information is transmitted based on the sensing results. Select resources that can be used to transmit sidelink information, and then indicate its reserved resources to other terminal devices by sending first control information. Since the first terminal device considers the sensing results, or the reserved resources of other terminal devices, when indicating the first reserved resources through the first control information, it is possible to avoid the first terminal device's reserved resources (th (a reserved resource) collides with the reserved resources of other terminal devices.
  • the first time unit is located before the first moment, and the time interval between the first time unit and the first moment is greater than the third time interval, where the first moment is The time when the first terminal device selects resources that can be used to send sidelink information based on the sensing results; or in other words, the first time is the time when the first terminal device completes processing the sensing results.
  • the third time interval may be predefined/preconfigured, or may be indicated by the network device, which is not limited by this application.
  • the first terminal device when the first terminal device sends side-link information, it has not yet selected resources that can be used to transmit the side-link information based on the sensing results, and the time to select the resources that can be used to transmit the side-link information is greater than the first terminal device.
  • Three time intervals When the time interval between the first time unit and the first moment is large, it can be considered that the channel state may change significantly before the first moment. Therefore, the first terminal device sends the sideline immediately after successfully executing the LBT. Information can avoid LBT failure caused by changes in channel status, which in turn causes the first terminal device to be unable to access the channel.
  • the first time unit is located before the first moment, and the time interval between the first time unit and the first moment is less than the third time interval, where the first moment is The time when the first terminal device selects resources that can be used to send sidelink information based on the sensing results; or in other words, the first time is the time when the first terminal device completes processing the sensing results.
  • the third time interval may be predefined/preconfigured, or may be indicated by the network device, which is not limited by this application.
  • the first time unit is located after the second moment, where the second moment is the moment when the first terminal device completes the packaging.
  • the channel occupancy time COT where the first reserved resource is located is located after the COT where the first time unit is located.
  • the first control information can be used to indicate where the first time unit is.
  • the resources in the COT after the COT, or in other words, the first reserved resources may be the resources in the COT after the COT where the first time unit is located. Therefore, the first terminal device can reserve resources in the next COT for sidelink information by sending the first control information.
  • the first reserved resources include resources reserved by the first terminal device for the TB to be transmitted; or in other words, the first reserved resources include resources reserved by the first terminal device for transmitting the next TB; or in other words, the first reserved resources include resources reserved by the first terminal device for transmitting the next TB.
  • a reserved resource includes periodic reserved resources of the first terminal device.
  • the first control information includes a first time interval, where the first time interval is the time interval between the second time unit and the time unit where the first reserved resource is located. time interval; or, The first control information includes a second time interval and a period, where the second time interval is the difference between the first time interval and the period, and the period is the period in which the first terminal device sends sideline information.
  • the first control information includes a first time interval, where the first time interval is a time interval between the second time unit and the time unit where the first reserved resource is located. At this time, the first control information may be used to indicate the first reserved resource on the time unit after the first time interval after the second time unit. For example, if the second time unit is time unit t and the first time interval is T1, then the first control information may be used to indicate the first reserved resource on time unit t+T1.
  • the first control information includes a second time interval and a period, where the second time interval is a difference between the first time interval and the period.
  • the first time interval may be represented by the sum of the second time interval and the period.
  • the second time unit is time unit t
  • the second time interval is T2
  • the first control information can be used to indicate the time unit t+T2+P rsvp Reserve resources first.
  • the second time unit is located in the first COT, where the first COT is the COT where the first time unit is located, and the first time unit is located before the second time unit ; Or, the second time unit is located within the second COT, wherein the first COT is located before the second COT.
  • the first control information can be sent in the first COT or in the second COT, where the first COT is the COT where the first time unit is located, or in other words, the side information is in Sent within the first COT.
  • the first COT may also be called the current COT.
  • the first control information may be sent within the first COT, when the first time unit is located before the second time unit.
  • the first control information may be sent within the second COT, and at this time, the first COT is located before the second COT in the time domain.
  • the sidelink information includes second control information, the second control information is used to indicate the second reserved resource of the first terminal device, and the second reserved resource is related to the first reserved resource.
  • a time unit is located within the same COT.
  • the sidelink information includes the second control information. It can also be understood that the resource carrying the sidelink information is also a resource carrying the second control information.
  • the first terminal device when the first terminal device sends the sidelink information, or when sending the second control information, it may not select resources that can be used to send the sidelink information based on the sensing results. Therefore, the first terminal device The device may indicate the reserved resources in the current COT through the second control information instead of indicating the reserved resources in the next COT through the second control information, thereby helping to avoid reserving resources for other terminal devices, that is, avoiding Improper resource reservation.
  • the identification information indicated by the first control information is the same as the identification information indicated by the second control information; or, the identification information indicated by the first control information is the second control information. Part of the bits of the identification information indicated; or, part of the bits of the identification information indicated by the first control information is the identification information indicated by the second control information.
  • the method of this embodiment through at least one of the above methods, it is possible to indicate the first reserved resource of the sidelink information through the first control information.
  • using the first control information to indicate the first reserved resource for the sideline information may also be understood as using the first control information to indicate the first reserved resource for the data in the resource where the second control information is located.
  • the first time unit is the first terminal device according to Perception results determine resources.
  • the first time unit is a resource determined by the first terminal device according to the sensing result, or it can also be understood that the first time unit does not include reserved resources of other UEs; or it can also be understood that the first time unit belongs to the first time unit.
  • the first terminal device if the first terminal device successfully performs LBT, and the first terminal device has selected resources that can be used to transmit sidelink information based on the sensing results, the first terminal device can access the channel, and in the first The sidelink information is sent on a time unit, where the resources available for transmitting the sidelink information include the first time unit. If the first terminal device successfully performs LBT, but the first terminal device has not selected a resource that can be used to transmit sidelink information based on the sensing result, the first terminal device does not access the channel.
  • the first terminal device when the first terminal device selects the resource for sending sidelink information, it not only considers whether the LBT is successful, but also considers whether the time unit for sending sidelink information (ie, the first time unit) is the first time unit according to the first terminal device.
  • the resources that can be used to transmit side-link information are selected based on the sensing results, thereby avoiding resource collisions between terminal devices and ensuring the reliability of side-link transmission.
  • the first terminal device sends sidelink information after the LBT is successful, which can ensure the fairness of access channels for various terminal devices.
  • the method before the first terminal device successfully performs the above LBT, the method further includes: the first terminal device successfully performs the LBT at least once.
  • the first terminal device before the first terminal device accesses the channel and sends sidelink information, the first terminal device can successfully perform LBT multiple times, wherein the first terminal device can access the channel when the last LBT is successfully performed. and send sideline information. For example, when the first terminal device successfully executes LBT for the last time, or before the last LBT execution is successful, the first terminal device selects resources that can be used to transmit sidelink information based on the sensing results, and can be used to transmit sidelink information. The resources include the first time unit when the first terminal device successfully performed LBT for the last time. At this time, the first terminal device can access the channel and send sidelink information.
  • the second aspect provides a resource selection method, which can be executed by a terminal device, or can also be executed by a chip or chip system or circuit configured in the terminal device. This application does not limit this. For convenience of description, the following description takes execution by the second terminal device as an example.
  • the method may include: the second terminal device receives first control information from the first terminal device, the first control information is used to indicate a first reserved resource of the first terminal device, and the first reserved resource is related to the first terminal device.
  • the first sideline information sent by the first time unit is related, wherein the first time unit includes the time unit where the first terminal device successfully performs LBT or the time unit next to the time unit where the first terminal device successfully performs LBT;
  • the second terminal device determines, according to the first control information, resources for sending the second sideline information among resources other than the first reserved resources.
  • the second terminal device receives the first control information from the first terminal device, which can also be understood as the second terminal device detects the first control information from the first terminal device.
  • the first reserved resource is related to the first sideline information sent by the first terminal device in the first time unit. It can be understood that the first reserved resource is reserved for the first sideline information in the first time unit. The reserved, or in other words, the first reserved resource is the reserved resource for the first sideline information on the first time unit.
  • the second terminal device can determine resources for sending the second sideline information among resources other than the first reserved resources according to the first control information from the first terminal device, or in other words , the second terminal device can send the second sideline information on resources other than the first reserved resource according to the first control information, so it can avoid The second sideline information is sent on a reserved resource, thereby improving the reliability of the first terminal device sending the first sideline information.
  • the time unit in which the first control information is located is located after the first time unit. That is to say, the first terminal device may first send the first sideline information in the first time unit, and then indicate the first reserved resource through the first control information. For example, the first terminal device may send the first control information after selecting resources that can be used to transmit the first sideline information based on the sensing results. Therefore, the first control information may be used to indicate reserved resources based on the sensing results, thereby enabling Avoid inappropriate resource reservations.
  • the method further includes: the second terminal device excludes the first reserved resource from the candidate resource set.
  • the candidate resource set refers to the candidate resource set of the second terminal device.
  • the second terminal device can exclude the first reserved resource from the candidate resource set of the second terminal device according to the first control information, thereby avoiding the problem caused by sending the second sideline information on the first reserved resource. resource collision.
  • excluding the first reserved resource from the candidate resource set may also be understood as a way to determine resources for sending the second sideline information among resources other than the first reserved resource, or in other words Determining resources for sending the second sideline information among resources other than the first reserved resources includes: excluding the first reserved resources from the candidate resource set.
  • the first reserved resource is a resource determined by the first terminal device based on the sensing result.
  • the first reserved resources are resources determined based on the sensing results, or it can also be understood as, the first reserved resources do not include reserved resources of other terminal devices (for example, the second terminal device); or it can also be understood as, The first reserved resources belong to the remaining resources of the first terminal device after excluding the reserved resources of other terminal devices.
  • the first control information is used to indicate reserved resources based on the sensing results. It can also be understood that when the first terminal device indicates the reserved resources through the first control information, the first terminal device considers the reserved resources of other terminal devices, thereby avoiding the third One reserved resource collides with the reserved resources of other terminal devices.
  • the channel occupancy time COT where the first reserved resource is located is located after the COT where the first time unit is located.
  • the first control information can be used to indicate where the first time unit is.
  • the resources in the COT after the COT, or in other words, the first reserved resources may be the resources in the COT after the COT where the first time unit is located. Therefore, the first terminal device can reserve resources in the next COT for sidelink information by sending the first control information.
  • the first reserved resources include reserved resources after the first time interval after the time unit in which the first control information is located.
  • the first reserved resources include reserved resources after the first time interval after the time unit where the first control information is located. That is to say, the first control information can be used to indicate the time unit where the first control information is located.
  • the first reserved resource on the time unit after the first time interval For example, if the time unit in which the first control information is located is time unit t and the first time interval is T1, then the first control information may be used to indicate the first reserved resource on time unit t+T1.
  • the first control information includes: a first time interval; or, a second time interval and a period, where the second time interval is a combination of the first time interval and the period.
  • Difference, period is The period during which the first terminal device sends the first sideline information.
  • the first control information includes a first time interval.
  • the second terminal device may exclude the first reserved resources after the first time interval after the time unit in which the first control information is located based on the first control information. For example, if the time unit in which the first control information is located is time unit t and the first time interval is T1, then the second terminal device may exclude the first reserved resource at time unit t+T1 according to the first control information.
  • the first control information includes a second time interval and a period, where the second time interval is a difference between the first time interval and the period.
  • the first time interval may be represented by the sum of the second time interval and the period.
  • the time unit in which the first control information is located is time unit t
  • the second time interval is T2
  • the second terminal device can exclude the time based on the first control information.
  • the first reserved resource at unit t+T2+P rsvp is
  • a resource selection method is provided.
  • the method can be executed by a terminal device, or can also be executed by a chip or chip system or circuit configured in the terminal device. This application does not limit this. For convenience of description, the following description takes execution by the second terminal device as an example.
  • the method may include: the second terminal device receiving control information from the first terminal device, the control information being used to indicate reserved resources of the first terminal device; and the second terminal device, according to the control information, in addition to the reserved resources and the first resources. Determine resources for sending sidelink information among other resources, wherein the first resource and the reserved resource are adjacent in the time domain.
  • the second terminal device not only needs to satisfy the requirements of determining the resources for sending sidelink information among the resources other than the reserved resources of the first terminal device, but also needs to satisfy the requirements of determining the resources for sending the sidelink information among the resources other than the first resources. Determine the resources used to send sidelink information.
  • the second terminal device since the second terminal device does not send sidelink information in the reserved resources of the first terminal device or in the resources adjacent to the reserved resources in the time domain, it is beneficial to improve the performance of the second terminal device.
  • the success rate and reliability of a terminal device sending sidelink information since the second terminal device does not send sidelink information in the reserved resources of the first terminal device or in the resources adjacent to the reserved resources in the time domain, it is beneficial to improve the performance of the second terminal device. The success rate and reliability of a terminal device sending sidelink information.
  • the first resource and the reserved resource are adjacent in the time domain, including: the time unit where the first resource is located is a preset period before the time unit where the reserved resource is located. ; Or, the time unit where the first resource is located is the preset period after the time unit where the reserved resource is located; or the time unit where the first resource is located includes the preset period before the time unit where the reserved resource is located and the time unit after the reserved resource is located. preset time period.
  • the second terminal device can not only exclude the reserved resources of the first terminal device, but also exclude the first resources.
  • the time unit where the first resource is located is the preset period before the time unit where the reserved resource of the first terminal device is located, it is beneficial to avoid the failure of the first terminal device to perform LBT before the time unit where the reserved resource is located, thereby improving the first Reliability of sideline information sent by terminal equipment.
  • the first terminal device When the first resource is a preset period after the time unit where the reserved resource of the first terminal device is located, if the first terminal device fails to perform LBT before the time unit where the reserved resource is located or in the time unit where the reserved resource is located, then The first terminal device can also send side-link information according to the LBT result within a preset period after the time unit where the reserved resource is located, thereby improving the success rate and reliability of the first terminal device sending side-link information.
  • the method further includes: the second terminal device excludes the reserved resources and the first resources from the candidate resource set.
  • an optional way is to select from the candidate resource set. Exclude reserved resources and first resources. Since the second terminal device excludes the reserved resources and the first resources from the candidate resource set, it cannot use the reserved resources.
  • the sidelink information is sent on the source and the first resource, so it is beneficial to improve the success rate and reliability of the first terminal device sending the sidelink information.
  • the method further includes: the second terminal device does not perform LBT in the time unit where the reserved resource is located and the time unit where the first resource is located; or, the second terminal device is in the time unit where the reserved resource is located.
  • the time unit where the reserved resource is located and the time unit where the first resource is located do not measure whether the channel is occupied.
  • the second terminal device may implement the above-mentioned determination of resources for sending sidelink information among resources other than reserved resources and first resources. Therefore, the second terminal device does not perform LBT during the time unit where the reserved resource is located and the time unit where the first resource is located, or does not measure whether the channel is occupied. Therefore, it is possible to avoid the second terminal device from accessing the channel and sending sidelink information within the time unit where the reserved resources and the first resources are located, thereby avoiding the failure of the first terminal device to perform LBT, thus improving the transmission side of the first terminal device. reliability of line information.
  • a fourth aspect provides a resource selection device, which is used to execute the method in any possible implementation manner of the first aspect or the third aspect.
  • the device may include units and/or modules for performing the method in any possible implementation of the first to third aspects, such as a processing unit and/or a communication unit.
  • the device is a first terminal device or a second terminal device.
  • the communication unit may be a transceiver, or an input/output interface;
  • the processing unit may be at least one processor.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the device is a chip, a chip system or a circuit for the first terminal device or the second terminal device.
  • the communication unit may be an input/output interface, interface circuit, output circuit, input circuit on the chip, chip system or circuit , pins or related circuits, etc.; the processing unit may be at least one processor, processing circuit or logic circuit, etc.
  • a fifth aspect provides a communication device.
  • the device includes: at least one processor for executing computer programs or instructions stored in a memory to execute the method in any of the possible implementations of the first to third aspects.
  • the device further includes a memory for storing computer programs or instructions.
  • the device further includes a communication interface, through which the processor reads the computer program or instructions stored in the memory.
  • the device is a first terminal device or a second terminal device.
  • the device is a chip, a chip system or a circuit for the first terminal device or the second terminal device.
  • this application provides a processor for executing the methods provided in the above aspects.
  • processor output, reception, input and other operations can be understood as processor output, reception, input and other operations.
  • transmitting and receiving operations performed by the radio frequency circuit and the antenna, which is not limited in this application.
  • a computer-readable storage medium stores a program code for device execution.
  • the program code includes a method for executing any of the possible implementations of the above-mentioned first to third aspects. method.
  • An eighth aspect provides a computer program product containing instructions, which when the computer program product is run on a computer, causes the computer to execute the method in any of the possible implementations of the first to third aspects.
  • a ninth aspect provides a chip.
  • the chip includes a processor and a communication interface.
  • the processor reads instructions stored in the memory through the communication interface and executes the method provided by any one of the above-mentioned implementations of the first to third aspects.
  • the chip also includes a memory, in which computer programs or instructions are stored.
  • the processor is used to execute the computer programs or instructions stored in the memory.
  • the processor is used to execute The method provided by any one of the above implementations of the first aspect to the third aspect.
  • a chip in a tenth aspect, includes a logic circuit and a communication interface.
  • the communication interface is used to receive data and/or information to be processed and transmit the data and/or information to be processed to the logic circuit.
  • the logic circuit is used to Execute the encoding process provided by any one of the above implementations of the first to third aspects, and the communication interface is also used to output the encoded polarization codeword.
  • a communication system including the above-mentioned first terminal device and second terminal device.
  • FIG. 1 is a schematic diagram of an example of a communication system applicable to the present application.
  • FIG. 2 is a schematic diagram of another example of a communication system applicable to the present application.
  • Figure 3 is a schematic diagram of the transmission structure of PSCCH, PSSCH, and PSFCH in NR.
  • Figure 4 is a schematic diagram of the transmission structure of PSCCH and PSSCH in NR.
  • Figure 5 is a schematic diagram of an example of a method for a UE to exclude resources within a resource selection window based on sensing results.
  • Figure 6 is a schematic diagram of an example of a resource selection method provided by an embodiment of the present application.
  • Figure 7 is a schematic diagram of a situation in which UE#1 sends SL information on the first time slot.
  • Figure 8 is a schematic diagram of another situation in which UE#1 sends SL information on the first time slot.
  • Figure 9 is a schematic diagram of an example of UE#1 sending SL information on the first time slot when LBT is successful again.
  • Figure 10 is a schematic diagram of another example of a resource selection method provided by an embodiment of the present application.
  • Figure 11 is a schematic diagram showing an example of UE#1 sending the first control information in the first COT.
  • Figure 12 is a schematic diagram showing an example of UE#1 sending the first control information in the second COT.
  • Figure 13 is a schematic diagram showing an example of service 1 and service 2 being transmitted within the same COT.
  • Figure 14 is a schematic diagram of another example in which service 1 and service 2 are transmitted within the same COT.
  • Figure 15 is a schematic diagram of another example of the resource selection method provided by the embodiment of the present application.
  • FIG. 16 is a schematic diagram of an example in which UE#2 excludes the first reserved resource of UE#1.
  • Figure 17 is a schematic diagram of another example of the resource selection method provided by the embodiment of the present application.
  • FIG. 18 is a schematic diagram showing an example in which UE#2 excludes the reserved resources and first resources of UE#1.
  • FIG. 19 is a schematic diagram of another example in which UE#2 excludes the reserved resources and first resources of UE#1.
  • Figure 20 is a schematic diagram of another example in which UE#2 excludes the reserved resources and first resources of UE#1.
  • Figure 21 is a schematic block diagram of a resource selection device provided by an embodiment of the present application.
  • Figure 22 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • S-U sidelink on unlicensed spectrum
  • D2D device to device
  • V2X vehicle to everything
  • MTC machine type communication
  • M2M machine to machine
  • the terminal device may be, for example, a terminal device, or a module used to implement the functions of the terminal device, such as a chip or a chip system, and the chip or chip system may be provided in the terminal device.
  • Terminal equipment also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • the terminal device may include a handheld device with a wireless connection function, a vehicle-mounted device, etc.
  • terminal devices can be: mobile phones, tablets, laptops, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (augmented reality (AR) equipment, XR equipment, MR equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, intelligent Wireless terminals in the power grid (smart grid), wireless terminals in transportation safety (transportation safety), wireless terminals in smart cities (smart city), or wireless terminals in smart homes (smart home), etc.
  • MID mobile Internet devices
  • VR virtual reality
  • AR augmented reality
  • XR equipment XR equipment
  • MR equipment augmented reality
  • wireless terminals in industrial control wireless terminals in self-driving
  • wireless terminals in remote medical surgery intelligent Wireless terminals in the power grid (smart grid), wireless terminals in transportation safety (transportation safety), wireless terminals in smart cities (smart city), or wireless terminals in smart homes (smart home), etc.
  • the terminal device in the embodiment of this application may also refer to an access terminal, a mobile device, a user terminal, a terminal, and a wireless communication device.
  • the terminal device of this application can be a device that includes wireless transceiver functions and can provide communication services to users.
  • the terminal device may be a device in the SL-U system, a device in the V2X system, a device in the D2D system, a device in the MTC system, etc.
  • the terminal may refer to an industrial robot, industrial automation equipment, user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless Terminal, mobile terminal, customer premise equipment (CPE), vehicle-mounted terminal, user agent, user device, terminal in virtual reality, terminal in augmented reality, terminal in telemedicine, terminal in smart grid, intelligence Terminals in furniture, terminals in smart offices, terminals in smart wearables, terminals in smart transportation, or terminals in smart cities, etc.
  • UE user equipment
  • CPE customer premise equipment
  • the terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless Handheld devices with communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminals in fifth generation ( 5th generation, 5G) networks or networks after 5G or future evolved communication networks Terminal in etc.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • 5G fifth generation
  • the terminal equipment of this application can also be various types of terminal equipment that communicate on unlicensed spectrum, such as equipment in wireless fidelity (Wi-Fi) scenarios (hereinafter referred to as Wi-Fi UE), Devices in the Bluetooth scenario (hereinafter referred to as Bluetooth UE), devices in the Zigbee scenario (hereinafter referred to as zigbee UE), etc.
  • Wi-Fi wireless fidelity
  • Bluetooth UE Devices in the Bluetooth scenario
  • zigbee UE devices in the Zigbee scenario
  • zigbee UE Zigbee scenario
  • the network device involved in this application can also be called network equipment, which is a device that provides access for terminal devices.
  • Network devices may include radio access network (RAN) devices, such as base stations.
  • RAN radio access network
  • Network equipment may also refer to equipment that communicates with terminal equipment over the air interface.
  • the network equipment may include an evolved base station (evolved Node B) in the LTE system or long term evolution-advanced (LTE-A), which may be referred to as eNB or e-NodeB).
  • eNB is a device deployed in a wireless access network that meets the fourth generation (the fourth generation, 4G) standards of mobile communication technology to provide wireless communication functions for terminal equipment.
  • the network device can also be a new radio controller (NR controller), which can be a (gNode B, gNB) in the 5G system, or a centralized
  • NR controller new radio controller
  • a network element can be a new wireless base station, a remote radio module, a micro base station (also called a small station), a relay, or a distributed unit.
  • TRP transmission reception point
  • TMF transmission measurement function
  • TP transmission point
  • Network equipment may also include a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), and a home base station.
  • RNC radio network controller
  • NB Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station a home base station.
  • a network device may correspond to an eNB in a 4G system and a gNB in a 5G system.
  • the network device may also be a central processing unit (central processing element, CPE), router, etc.
  • CPE central processing element
  • the network device may also be a functional module, a chip or a chip system.
  • functional modules, chips or chip systems may be disposed within the network device.
  • network equipment is taken as an example for explanation. This application does not limit the specific technologies and specific equipment forms used in network equipment.
  • FIGS 1 and 2 are schematic diagrams of communication systems suitable for this application.
  • the terminal device for communication may be, for example, a mobile phone.
  • the communication link between the terminal equipment and the network equipment includes an uplink and a downlink
  • the communication link between the terminal equipment and the terminal equipment is a side link.
  • the terminal device of one party to the communication can be, for example, a virtual reality (VR) device, an augmented reality (AR) device, or a mixed reality device (mixed reality, MR).
  • the other terminal device of the communication The device may be a processing device or a display device, for example.
  • the terminal device may be a SL UE, a Wi-Fi UE, a Bluetooth UE or a zigbee UE.
  • the following exemplification mainly takes the terminal equipment as SL UE.
  • Figures 1 and 2 are only simplified schematic diagrams for ease of understanding and do not constitute any limitation on the scope of protection of the present application.
  • the communication system may also include other terminal equipment, which are not shown in Figures 1 and 2 .
  • Resources refer to time-frequency resources in the resource pool.
  • time domain resources include symbols, slots, mini-slots, partial slots, sub-frames, wireless frames, sensing time Sensing slot, etc.
  • Frequency domain resources include resource element (RE), resource block (RB), subchannel (subchannel), resource pool (resource pool), bandwidth (bandwidth), bandwidth part (BWP), and carrier (carrier), channel (channel), interlace (interlace), etc.
  • this article takes the time domain resource as a time slot as an example to describe the resources for transmitting PSCCH and/or PSSCH.
  • PSCCH Physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • PSFCH physical sidelink feedback channel
  • the scheduling granularity of PSCCH and/or PSSCH is a time slot in the time domain, and one or more consecutive sub-channels in the frequency domain.
  • the sending UE can send sidelink information on this resource.
  • One resource can carry three channels: PSCCH, PSSCH, and PSFCH, as well as demodulation reference signal (DMRS), channel state information reference signal (channel state information reference signal, CSI-RS) and other signals.
  • PSCCH carries first-order sidelink control information (SCI)
  • PSSCH carries second-order SCI and/or data
  • PSFCH carries feedback information.
  • PSCCH carries first-order SCI.
  • PSCCH occupies two or three orthogonal frequency division multiplexing (OFDM) symbols starting from the second side row symbol; in the frequency domain, the physical resource blocks that carry PSCCH , PRB) starting from the lowest PRB of the lowest subchannel of the associated PSSCH, and the number of PRBs occupied by the PSCCH is within the subband range of one PSSCH.
  • PSCCH consists of ⁇ 10, 12, 15, 20, 25 ⁇ resource blocks (RB), and the specific value is determined by pre-configuration or network configuration.
  • PSSCH carries second-order SCI and data.
  • time domain on resources without PSFCH, 12 symbols are used to carry PSSCH; on resources with PSFCH, 9 symbols are used to carry PSSCH.
  • frequency domain it occupies continuous L subCh sub-channels.
  • the first OFDM symbol copies the information sent on the second symbol for automatic gain control (Automatic Gain Control, AGC).
  • AGC Automatic Gain Control
  • PSFCH carries feedback information.
  • the penultimate and third OFDM symbols are used to carry PSFCH.
  • the signal on the third to last symbol is a repetition of the signal on the second to last symbol so that the receiving UE can perform AGC adjustment.
  • the UE may receive and send PSSCH respectively on two consecutive time slots, and the UE may also receive and send PSSCH and PSFCH respectively on the same time slot. Therefore, after the PSSCH and the PSFCH symbol, an additional symbol (GAP symbol) may be needed for the UE's transceiver conversion.
  • Figure 3 shows a schematic diagram of the transmission structures of PSCCH, PSSCH, and PSFCH in NR.
  • the PSCCH, PSSCH and PSFCH can be carried on one time slot and three sub-channels, where one time slot includes 14 symbols.
  • Figure 4 shows a schematic diagram of the transmission structure of PSCCH and PSSCH in NR. There is no PSFCH opportunity in the time slot of this transmission structure.
  • the PSCCH and PSSCH can be carried on 1 time slot and 3 sub-channels, where 1 time slot includes 14 symbols.
  • Control information includes SCI, media access control control element (MAC CE), radio resource control (RRC), proximity services communication-5 (proximity-based services communication, PC- 5)RRC etc.
  • SCI can refer to first-order SCI and/or second-order SCI, where first-order SCI can also be recorded as SCI-1 and second-order SCI can also be recorded as SCI-2.
  • the first-order SCI is carried on the PSCCH
  • the second-order SCI and/or MAC CE are carried on the PSSCH
  • RRC and PC-5RRC are carried on the PSSCH.
  • the SCI mentioned in this application refers to first-order SCI and/or second-order SCI.
  • Data information is carried on PSSCH.
  • the data can also be called SL data or MAC service data unit (MAC service data unit, MAC SDU).
  • MAC service data unit MAC service data unit
  • PSSCH may have the same meaning without causing ambiguity.
  • the resource pool refers to a time-frequency resource dedicated to SL communication.
  • the frequency domain resources contained in the resource pool are continuous.
  • the time domain resources contained in the resource pool can be continuous or discontinuous.
  • Different resource pools are distinguished by SL resource pool identifiers (such as SL-ResourcePoolID).
  • the UE receives on the receiving resource pool and sends on the transmitting resource pool. If the resource pools have the same resource pool index, the time-frequency resources of the resource pools can be considered to be completely overlapping.
  • the frequency band is shared by multiple forms of UE.
  • UE in the SL scenario (hereinafter referred to as SL UE), Wi-Fi UE, and Bluetooth UE transmit on the same frequency band.
  • the SL resource pool can also be understood as: a collection of resources that can be used for SL transmission.
  • the resource pool may also be called a channel, an operating channel, a nominal channel bandwidth, or a bandwidth. That is to say, in this application, resource pool, channel, and bandwidth can all represent a set of resources that can be used for SL transmission.
  • the resource pool includes at least one channel.
  • the resource pool includes a channel with a channel bandwidth of 20MHz and a resource pool bandwidth of 20MHz.
  • the resource pool includes 2 channels, the channel bandwidth is 20MHz, and the resource pool bandwidth is 40MHz.
  • the resource pool includes 5 channels, the channel bandwidth is 20MHz, and the resource pool bandwidth is 100MHz.
  • the UE's service priority refers to the UE's transmission priority (transmission priority). Since the UE may send multiple services at the same time, the priorities of the multiple services may be different.
  • the service priority can also be called L1 priority (L1 priority), physical layer priority, the priority carried in the SCI, the priority corresponding to the PSSCH associated with the SCI, the sending priority, the priority of sending the PSSCH, and the user Based on the priority of resource selection, the priority of logical channels, and the highest level priority of logical channels.
  • L1 priority L1 priority
  • physical layer priority the priority carried in the SCI
  • the priority corresponding to the PSSCH associated with the SCI the sending priority
  • the priority of sending the PSSCH and the user Based on the priority of resource selection, the priority of logical channels, and the highest level priority of logical channels.
  • the priority level and the priority value have a corresponding relationship.
  • a higher priority level corresponds to a lower priority value, or it can be understood that a lower priority value represents a higher level of priority.
  • the lower the priority level, the lower the priority value, or it can be understood that a lower priority value represents a lower level of priority is a higher priority level.
  • the priority value range is an integer from 0 to 7.
  • a lower priority value represents a higher level of priority, when the priority value is 0, it represents the highest level of priority.
  • a lower priority value represents When the priority value represents a lower level of priority, a priority value of 7 represents the highest level of priority.
  • this application takes the example that the higher the priority level, the lower the corresponding priority value.
  • Source identifier Destination identifier
  • the layer 2 source identifier (source layer-2 ID or source L2 ID) is 24bit.
  • the lower 8 bits (LSB part (8bits)) of the layer 2 source identifier are called the layer 1 source identifier, which is the source ID (source ID) indicated in the SCI of NR; the upper 16 bits (MSB part (16bits)) are called SRC, indicated in the MAC header of the MAC CE.
  • the source identifier in the control information may refer to the source ID indicated in the SCI of the NR, the SRC in the MAC header, and the layer 2 source identifier.
  • the layer 2 destination identification (destination layer-2 ID or destination L2 ID) is 24bit.
  • the lower 16 bits (LSB part (16bits)) of the layer 2 destination identifier are called the layer 1 destination identifier, which is the destination ID (destination ID) indicated in the SCI of NR; the upper 8 bits (MSB part (8bits) ) is called DST and is indicated in the MAC header of MAC CE.
  • the destination identifier in the control information may refer to the destination ID indicated in the SCI, the DST in the MAC header, and the layer 2 destination identifier.
  • LTE long term evolution
  • destination can also be referred to generally in the protocol.
  • destination represents the pair of layer 2 source identifier and layer 2 destination identifier; for broadcast and multicast, destination represents the layer 2 destination identifier.
  • Radio Frequency Allocation Regulations of the People's Republic of China in order to fully, reasonably and effectively utilize radio spectrum resources, ensure the normal operation of radio services, and prevent mutual interference between various radio services, radio stations and systems, the frequency bands have been classified. divide. Technologies such as 2/3/4/5G use licensed spectrum and need to be applied for by telecom operators before they can be used. They have the characteristics of low interference and security.
  • Wi-Fi, Bluetooth, and Zigbee use unlicensed spectrum. They are intended to serve as supplementary tools for operators to enhance their service offerings. They can use licensed spectrum communications without applying for free, and they are free of charge. Communication on unlicensed spectrum requires compliance with certain regulations, such as listen-before-talk (LBT) and occupied channel nandwidth (OCB) requirements, which are used to ensure that various types of devices operating on this spectrum Fairness of UE access channel.
  • LBT listen-before-talk
  • OCB occupied channel nandwidth
  • SL communication on unlicensed spectrum may be called SL-U.
  • Wi-Fi UE, Bluetooth UE, and Zigbee UE can be collectively referred to as different system UE compared to SL UE.
  • LBT listen-before-talk
  • LBT can also be understood as channel access, that is, it is determined that the channel is idle within a period of time, then the UE can Transmit information within the channel.
  • LBT includes type 1 (type1) LBT and type 2 (type2) LBT.
  • Type 1 LBT is LBT based on fallback. The fallback time is related to CAPC and requires the channel to be idle for a long time before access.
  • the frequency domain unit for performing channel access is a channel.
  • Type 1 channel access (type 1 channel access or type 1 SL channel access):
  • Type 1 channel access may also be referred to as Type 1 LBT. It includes 2 parts: channel sensing of length Td (defer duration) and loop sensing.
  • the sensing time of T f is 9us at the beginning.
  • the value of m p can be found in Table 1 or Table 2, where CW min,p ⁇ CW p ⁇ CW max,p is the contention window, and T cot,p is the maximum length of the COT.
  • Loop awareness is a loop process based on counter N, including the following steps:
  • Step 3 Sense the channel within an additional sensing slot duration. If the sensing result is idle, go to step 4; otherwise, go to step 5;
  • Step 5 Sense the channel until it senses that one sensing slot in Td is busy, or until all sensing slots in Td are idle;
  • Step 6 If all sensing time slots in Td are idle, go to step 4; otherwise, go to step 5.
  • the counter N may also be called the LBT counter N.
  • Table 1 and Table 2 show related parameter values of channel access.
  • Type 2 channel access (type 2 channel access or type 2 SL channel access)
  • Type 2 channel access includes three types, Type 2A, Type 2B, and Type 2C.
  • Type 2 LBT only requires the channel to be idle for a short period of time (such as 16us or 25us) before the UE can access the channel.
  • Type 2 LBT is mainly used when COT is shared and has corresponding execution conditions. For example, the UE of the initial COT and the UE sharing the COT mainly have a sending and receiving relationship.
  • type 2A, type 2B, and type 2C are introduced below respectively.
  • Type 2C channel access UE can transmit without channel sensing, and the transmission time is up to 584us.
  • a channel refers to a carrier or a part of a carrier consisting of a set of contiguous resource blocks (RBs) that performs channel access procedures in unlicensed spectrum. It can be understood that the channel is the bandwidth for the UE to perform channel access.
  • RBs resource blocks
  • the channel can also be called an RB set.
  • Channel occupation refers to the UE's transmission on one or more channels after performing the channel access procedure.
  • COT can be a time concept, that is, the time of SL transmission, or it can be a resource concept, that is, the time-frequency resources occupied by SL transmission. In this application, without further distinction, COT and CO may be the same concept.
  • the UE may transmit information on multiple adjacent or non-adjacent channels.
  • the UE transmitting information on multiple channels can be understood as: the UE transmitting information occupies one COT, and the COT occupies multiple channels in the frequency domain, or the UE transmitting information occupies multiple COTs, and each COT Occupies 1 channel in the frequency domain.
  • COT can be shared for information transmission between UEs (COT sharing).
  • the UE with the initial COT can share the COT with other UEs, that is, used for SL transmission of other UEs.
  • the UE of the initial COT and the UE sharing the COT occupy the channel for a continuous period of time to transmit COT sharing. The corresponding conditions need to be met.
  • the UE of the initial COT is the receiving UE or the sending UE of the UE sharing the COT.
  • Another example is the UE of the initial COT and the sharing
  • the UEs of COT are members of the same group.
  • the time for the UE to transmit information cannot exceed the limit of the maximum channel occupancy time (MCOT), which is recorded as T cot,p .
  • T cot,p the values of T cot,p are different, as shown in Table 1 and Table 2.
  • T cot,p the transmission time does not exceed the maximum channel occupancy time T cot,p .
  • T cot,p the transmission time of the UE in the initial COT and the UE sharing the COT does not exceed the maximum channel occupancy time T cot,p .
  • p is the CAPC of the UE of the initial COT, or p is the CAPC with the smallest CAPC value among the UEs transmitted by COT.
  • ID can also be called identification, sequence, number, and index.
  • the methods for determining resources for transmitting SL information for the UE include mode 1 (mode1) and mode 2 (mode2).
  • mode 1 the resources used by the UE to transmit SL information can be scheduled by the base station.
  • mode 2 the base station can configure a resource pool, so that the UE can select resources that can be used to transmit SL information through resource sensing and resource selection.
  • the method for the UE to perform resource sensing and resource selection may include the following steps:
  • Step 1 The UE senses resources within the resource sensing window by decoding the PSCCH and measuring the PSRP value, or in other words, performs resource sensing.
  • Step 2 Based on the sensing results of the resources in the resource sensing window, the UE determines whether to exclude resources from the resource selection window by comparing the reference signal receiving power (RSRP) threshold and RSRP measurement value, thereby forming a candidate resource set.
  • RSRP reference signal receiving power
  • Figure 5 shows a schematic diagram of an example of a method for a UE to exclude resources within a resource selection window based on sensing results.
  • the RSRP threshold is related to the service priority indicated by the SCI and the UE's own service priority.
  • the reserved resources can be understood as resources pre-designated or occupied by a certain UE (such as UE#1) for subsequent information transmission by the UE (UE#1). Therefore, other UEs (such as UE#2) can use As a result of resource sensing, the reserved resource is excluded from the resource selection window of the UE (UE#2).
  • Step 3 The UE selects resources that can be used to transmit SL information from the candidate resource set, where the SL information transmitted by the UE includes initial transmission information and several retransmission information.
  • Step 4 When certain conditions are met, such as the reserved resources of the UE coincide with the reserved resources of other UEs and the reselection counter, the UE triggers resource reselection.
  • the reselection counter can also be understood as the UE re-evaluating whether the resources in the candidate resource set are available. If not, the UE triggers resource reselection.
  • SL-U communication scenario LBT requirements need to be followed, or channel access needs to be performed to ensure fairness of channel access for all types of UEs.
  • resources that can be used to transmit SL information are only selected based on the resource sensing results, and LBT is not performed, or channel access is not performed. Therefore, the method of selecting resources in the above SL communication scenario does not apply. Suitable for SL-U communication scenarios.
  • this application provides a resource selection method and device for SL-U communication scenarios.
  • the terminal device sends SL information after LBT is successful, which is beneficial to ensuring the fairness of access channels for various types of UEs. .
  • the time unit may be, for example, a symbol, a time slot, a mini-slot, a partial time slot, a subframe, a wireless frame, a sensing time slot, etc., which is not limited in this application.
  • the resource selection method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.
  • the resource selection method provided by the embodiment of the present application can be applied to the communication system shown in FIG. 1 and FIG. 2 above.
  • Figure 6 is a schematic diagram of an example of a resource selection method provided by an embodiment of the present application.
  • the method 600 may include S610 and S620.
  • UE#1 (ie, an example of the first terminal device) may start performing LBT from time slot n, or in other words, start performing channel access. For example, perform type 1LBT. Furthermore, UE#1 can select resources for transmitting SL information according to the LBT result.
  • UE#1 may start performing LBT according to CAPC.
  • parameter values related to channel access such as CAPC can be referred to Table 1 and Table 2 above.
  • UE#1 can also select resources that can be used to transmit SL information starting from time slot n based on the sensing results, or in other words, perform resource selection based on the sensing results. Among them, UE#1 selects resources based on the sensing results. It can also be understood that UE#1 considers the reserved resources of other UEs in the process of selecting resources, or it can also be understood that UE#1 selects resources from The candidate resource set of UE#1 excludes reserved resources of other UEs.
  • UE#1 considers the sensing results when selecting resources, or considers the reserved resources of other UEs, then UE#1 selects resources that can be used to transmit SL information based on the sensing results. , may not include the reserved resources of other UEs, or in other words, the resources that UE#1 selects according to the sensing results and can be used to transmit SL information do not belong to the reserved resources of other UEs.
  • the SL information may include at least one of PSCCH, PSSCH, and PSFCH.
  • the transmission structure of the SL information may be, for example, the transmission structure shown in FIG. 3 or FIG. 4 .
  • PSCCH can be used to carry control information
  • PSSCH can be used to carry control information and/or data
  • PSFCH can be used to carry feedback information. Therefore, SL information includes PSCCH, At least one of PSSCH and PSFCH can also be understood as the SL information includes at least one of SL data information, SL control information, and SL feedback information.
  • time slot n can also be used to represent any of the following moments: the moment when resource selection is triggered, the moment when transmission parameters are determined, the moment when data is determined to be sent, the moment when the physical layer reaches the packet, the moment when the MAC layer The time when the packet is received and the time when channel access is started.
  • the transmission parameters may include, for example, one or more of the following parameters: physical layer priority (L1 priority), channel access priority class (channel access priority class, CAPC), number of sub-channels, number of interleaves, and period.
  • L1 priority physical layer priority
  • CAPC channel access priority class
  • number of sub-channels number of interleaves, and period.
  • the time (duration) elapsed from the time slot n when UE#1 starts selecting resources based on the sensing results to selecting resources that can be used to transmit SL information or in other words, UE#1 selects resources that can be used for transmission based on the sensing results.
  • the time of SL information can be recorded as T proc .
  • T proc can also be understood as: the time for resource selection based on sensing results, the time for selecting resources that can be used to transmit SL information based on transmission parameters, the processing time for selecting resources that can be used for SL transmission, and the time for selecting resources that can be used for SL transmission based on sensing results.
  • time slot n+T proc can be understood as: a time slot that selects resources that can be used to transmit SL information, a time slot that selects resources that can be used to transmit SL information based on transmission parameters, a time slot that selects SL resources, A time slot in which resources available for SL transmission is selected, a time slot in which resources available for SL transmission are selected based on the sensing results, a time slot in which the sensing results are processed, or a time slot in which the sensing results are processed based on transmission parameters.
  • T proc may be predefined, or may also be indicated by the network device, which is not limited by this application.
  • the time T proc for resource selection based on the sensing results may include any one of the following times, or the sum of at least two of them: time to prepare sensing results, time to report sensing results to the MAC layer, MAC layer selection The time for resource or creation authorization (selected sidelink grant), the time for the MAC layer to indicate the resource to the physical layer, the time for transceiver conversion, and the data preparation time.
  • the data preparation time includes any one of the following times, or the sum of at least two of them: channel coding time, modulation time, RE mapping time, OFDM signal generation time, and packetization time.
  • the value of T proc is related to the subcarrier spacing (subcarrier space, SCS).
  • the subcarrier spacing of NR can be 2 ⁇ ⁇ 15KHz.
  • T proc is any one of T proc optional value 1, T proc optional value 2 or T proc optional value 3.
  • the unit of T proc in Table 3 is time slot, and the unit of T proc in Table 4 is millisecond (ms).
  • the value of T proc can also be the sum of times corresponding to A milliseconds + B number of time slots.
  • the values of A and B can be determined according to the transmission capability of the UE.
  • S620 UE#1 sends SL information on the first timeslot.
  • the first time slot includes the time slot in which UE#1 successfully performs LBT or the time slot next to the time slot in which UE#1 successfully performs LBT.
  • UE#1 may select a resource for transmitting SL information according to the result of performing LBT. Specifically, if the LBT is successful, UE#1 may send SL information on the first time slot.
  • the first time slot includes the time slot in which the LBT is successful or the time slot next to the time slot in which the LBT is successful.
  • the time when UE#1 performs LBT and the time when it selects resources based on the sensing results may be different, it may happen that the resources that can be used to transmit SL information have not been selected based on the sensing results when LBT is successful. If UE#1 does not send SL information when LBT is successful, or does not access the channel, other UEs may access the channel, causing LBT to fail when UE#1 selects resources that can be used to transmit SL information based on the sensing results. . Therefore, in a possible implementation of this embodiment, regardless of whether UE#1 selects resources that can be used to transmit SL information based on the sensing results, UE#1 immediately accesses the channel and sends SL information after the LBT succeeds. , or in other words, the SL information is sent in the time slot in which UE#1 successfully performs LBT or the next time slot in which UE#1 successfully performs LBT, thus ensuring the fairness of access channels for all types of UEs.
  • the time slot in which LBT is successful can be used to send SL information. For example, if the time when LBT succeeds is located at the beginning of the time slot, then the first time slot includes the time slot when LBT succeeds.
  • the time slot in which LBT is successful cannot be used to send SL information. For example, if the time when LBT succeeds is located in the middle of the time slot, and the time slot after this position is not enough to send SL information, then the first time slot includes the time slot next to the time slot when LBT succeeds.
  • the sensing slot of LBT is a time unit of 9us. If UE#1 succeeds in LBT in one sensing time slot, it will access the channel in the next sensing time slot.
  • UE#1 sending SL information on the first timeslot may include the following situations:
  • Case 1 The first time slot does not belong to the candidate resource set of UE#1.
  • UE#1 still sends SL information on the first slot. That is to say, regardless of whether the resource belongs to the candidate resource set of UE#1, UE#1 sends SL information on the first time slot.
  • the fact that the first time slot does not belong to the candidate resource set of UE#1 can also be understood to mean that the resource in which the first time slot is located does not belong to the candidate resource set of UE#1.
  • Case 2 When LBT is successful, UE#1 has not selected resources that can be used to transmit SL information based on the sensing results, or in other words, the first time slot is earlier than time slot n+T proc . In this case, UE#1 still sends SL information on the first slot. That is, no matter whether the first time slot is earlier or later than time slot n+T proc , UE#1 sends SL information on the first time slot.
  • Figure 7 shows an example schematic diagram of case 2.
  • UE#1 starts to perform LBT from time slot n, and at the same time starts to select resources that can be used to transmit SL information based on the sensing results. Moreover, UE#1 successfully performs LBT in time slot m, and in time slot n+T proc selects resources that can be used to transmit SL information based on the sensing results, then the time slot in which UE#1 sends SL information includes time slot m, or Time slot m+1. In other words, the time slot in which UE#1 sends SL information is the first time slot.
  • Case 3 The time slot in which UE#1 successfully performs LBT is earlier than time slot n+T proc , and the time interval between time slot n+T proc and time slot n+T proc is less than the time interval T, then UE#1 is in the first time slot Send SL information on.
  • the time interval between the time slot in which UE#1 successfully performs LBT and time slot n+T proc is less than the time interval T, it can be considered that UE#1 will soon be able to perform the LBT in time slot n+T proc .
  • the SL information is sent on the resource determined based on the sensing result.
  • the first time slot before the time slot where the resource is located does not belong to the resources determined based on the sensing results, even if UE#1's SL information is transmitted for 1 or 2 time slots, it will not seriously affect the resources. other UEs in the pool. Therefore, UE#1 sends sidelink information immediately after successfully executing LBT.
  • the time interval T is related to the physical layer priority and/or CAPC of UE#1. For example, the smaller the value of the physical layer priority and/or CAPC, the larger the time interval T.
  • UE#1 when the physical layer priority value and/or CAPC is less than the first priority value, UE#1 sends SL information on the first timeslot; in another example, when the physical layer priority level and/or the first priority value /or When the CAPC level is higher than the first priority level, UE#1 sends SL information on the first time slot.
  • the first priority value and the first priority level may be predefined by the protocol, or may be generated according to predefined rules, or may be preconfigured, or may be dynamically configured, No restrictions.
  • Case 4 The time slot in which UE#1 successfully performs LBT is earlier than time slot n+T proc , and the time interval between time slot n+T proc and time slot n+T proc is greater than the time interval T', then UE#1 is in the first time slot. Send SL information on the slot.
  • UE#1 sends sidelink information immediately after successfully executing LBT, which can avoid LBT failure due to channel state changes, which in turn causes the first terminal device to be unable to access the channel.
  • the time interval T' may be predefined, or may be indicated by the network device, which is not limited by this application.
  • the time interval T' is related to the physical layer priority and/or CAPC of UE#1. For example, the smaller the value of the physical layer priority and/or CAPC, the larger the time interval T'.
  • UE#1 when the physical layer priority value and/or CAPC is less than the first priority value, UE#1 sends SL information on the first timeslot; in another example, when the physical layer priority level and /or When the CAPC level is higher than the first priority level, UE#1 sends SL information on the first time slot.
  • the first priority value and the first priority level may be predefined by the protocol, or may be generated according to predefined rules, or may be preconfigured, or may be dynamically configured, No restrictions.
  • Figure 8 shows an example schematic diagram of case 3.
  • UE#1 starts to perform LBT from time slot n, and at the same time starts to select resources that can be used to transmit SL information based on the sensing results. Subsequently, UE#1 performs LBT formation in time slot m. Successfully, in time slot n+T proc, resources that can be used to transmit SL information are selected based on the sensing results, and the time interval between time slot m and time slot n+T proc is less than the time interval T, then UE#1 sends The time slot of the SL information can be time slot m, or time slot m+1. In other words, the time slot in which UE#1 sends SL information is the first time slot.
  • the first time slot is located after the second time, where the second time is the time when the first terminal device completes the grouping.
  • UE#1 sends SL information on the first time slot, including: UE#1 sends SL information on the first time slot and at least one time slot after the first time slot.
  • the time slot for sending SL information can be more than 1 time slot, for example, the time slot for sending SL information includes M time slots, therefore, UE#1 can send M SL information after LBT is successful. , or in other words, UE#1 can send M PSCCHs and/or PSSCHs after successful LBT, and optionally, M PSFCHs can also be sent.
  • the last M-1 SL information is a repetition or retransmission of the first SL information.
  • the M SL information may include initial transmission information and at least one retransmission information. Among them, M is an integer greater than or equal to 1.
  • the first time slot among the M time slots may be the time slot where the LBT is successful, and the last time slot among the M time slots may be the time slot n+T proc .
  • the first time slot among the M time slots may be the time slot when LBT succeeds, and the last time slot among the M time slots may be the time slot n+T proc +1.
  • the first time slot among the M time slots may be the next time slot of the time slot when the LBT is successful, and the last time slot among the M time slots may be the time slot n+T proc .
  • the first time slot among the M time slots may be the time slot next to the time slot when LBT succeeds, and the last time slot among the M time slots may be the time slot n+T proc + 1.
  • UE#1 regardless of whether UE#1 selects resources that can be used to transmit SL information based on the sensing results, UE#1 immediately accesses the channel and sends SL information after the LBT succeeds, or in other words, after UE#1
  • the SL information is sent in the time slot in which the LBT is successfully performed or in the time slot next to the time slot in which the LBT is successful, thus ensuring the fairness of access channels for all types of UEs.
  • the time slot in which UE#1 performs LBT successfully or the time slot next to the time slot in which LBT succeeds may be reserved resources of other UEs (such as UE#2), that is to say , if UE#1 sends SL information on this resource, it may cause other UEs to be unable to send SL information on this reserved resource.
  • the physical layer priority level of other UEs is higher, it may happen that the UE with a higher priority level cannot use the transmission resources first, thereby reducing the reliability of other UEs sending SL information and increasing the risk of other UEs. time delay.
  • UE#1 can select a resource that can be used to transmit SL information according to the sensing result, if the LBT is successfully performed on the time slot where the resource is located, or if If the LBT is successfully executed in the time slot preceding the time slot in which the resource is located, UE#1 accesses the channel and sends SL information on the resource. Therefore, resource collision between the first time slot and the reserved resources of other UEs can be avoided, or in other words, the first time slot can be prevented from belonging to the reserved resources of other UEs.
  • UE#1 can access the channel and send SL information on the first time slot , wherein the resources available for transmitting SL information include the first time slot. If UE#1 successfully performs LBT, but UE#1 has not selected resources that can be used to transmit SL information based on the sensing results, UE#1 does not access the channel.
  • the time slot in which UE#1 starts to perform channel access is located before the time slot in which UE#1 selects resources that can be used to transmit SL information, or in other words, before time slot n+T proc .
  • UE#1 has not yet selected a resource that can be used to transmit SL information based on the sensing results. In other words, UE#1 cannot determine whether the first time slot is a resource that can be used to transmit SL information. .
  • an optional implementation method is that even if the LBT is successful, UE#1 does not access the channel, but waits until time slot n After +T proc , if LBT is successful again, and UE#1 can judge based on the sensing result that the first time slot when LBT is successful again is a resource that can be used to transmit SL information, then UE#1 can access immediately after LBT is successful again. channel and send SL information.
  • the first time slot when LBT is successful again includes the time slot when LBT is successful again, or the time slot next to the time slot when LBT is successful again.
  • UE#1 may successfully perform LBT multiple times, wherein UE#1 may access the channel and send SL information when the last time it successfully performs LBT. For example, when UE#1 successfully performs LBT for the last time, or before successfully performing LBT for the last time, it selects resources that can be used to transmit SL information based on the sensing results. At this time, UE#1 can access the channel and send SL information. .
  • Figure 9 shows an example of UE#1 sending SL information on the first time slot when LBT is successful again.
  • the time slot m1 where LBT was successful for the first time is located before time slot n+T proc
  • the time slot m2 where LBT was successful for the second time is located after time slot n+T proc . Therefore, UE#1 can determine according to the sensing result whether the first time slot when LBT succeeds for the second time is a resource that can be used to transmit SL information.
  • the first time slot when LBT succeeds for the second time is a resource that can be used to transmit SL information, resources, then UE#1 can send SL information on the first time slot when LBT succeeds for the second time, or in other words, UE#1 can send SL information on time slot m2 or time slot m2+1, or in other words, UE #1 can access the channel the second time LBT succeeds.
  • UE#1 does not perform LBT before time slot n+T proc until time slot n+T proc starts to perform LBT. Therefore, UE#1 can first select based on the sensing result. resources that can be used to transmit SL information. If LBT is successful and the first time slot is the resource that UE#1 selects and can be used to transmit SL information, UE#1 can access the channel and send SL on the first time slot. information.
  • UE#1 when UE#1 selects the resource to send SL information, it not only considers whether the LBT is successful, but also considers whether the time slot for sending SL information is the one selected by UE#1 based on the sensing result and can be used to transmit SL information. resources, thereby avoiding resource collisions between UEs and ensuring the reliability of SL transmission.
  • UE#1 sends SL information after LBT is successful, which can ensure fairness of access channels for all types of UEs.
  • the method 600 further includes: UE#1 excludes resources in the candidate resource set according to the sensing result.
  • the candidate resource set refers to the candidate resource set of UE#1.
  • UE#1 excludes resources from the candidate resource set based on the sensing result, which can also be understood as UE#1 excludes resources reserved by other UEs from the candidate resource set based on the sensing result to avoid resource collision.
  • the candidate resource set is a set of resources within the resource selection window.
  • the starting position of the resource selection window may be determined based on at least one of the following parameters: physical layer priority, CAPC, contention window CW p (Contention window), and LBT counter initial value (N init ).
  • the starting position of the resource selection window can be determined according to the following parameters: n+T f +m p ⁇ T sl +N init ⁇ T sl , or n+min ⁇ T f +m p ⁇ T sl +N init ⁇ T sl ,T proc ⁇ , or n+max ⁇ T f +m p ⁇ T sl +N init ⁇ T sl ,T proc ⁇ .
  • n represents time slot n.
  • N init can be a preset value, or a random number ranging from 0 to CW p .
  • N2 is an integer.
  • UE#1 may exclude the reserved resources of other UEs in the candidate resource set according to the sensing results in various ways. Two situations are described below.
  • UE#1 only considers whether the LBT is successful and needs to access the channel and send SL information immediately after the LBT is successful. Then UE#1 excludes the reserved resources of other UEs in the candidate resource set based on the sensing results. For example, it may be: excluding the reserved resources of other UEs after the first time slot according to the sensing result, or UE#1 does not exclude the first time slot when excluding the reserved resources of other UEs in the candidate resource set according to the sensing result; or , UE#1 selects the resource of the first time slot; thus, the first time slot can be used to transmit SL information.
  • UE#1 not only considers whether the LBT is successful, but also considers the sensing results to avoid resource collisions between UEs. Then UE#1 excludes the reserved resources of other UEs in the candidate resource set based on the sensing results, such as It may be that the reserved resources of other UEs after time slot n+T proc are excluded according to the sensing result, so that UE#1 can select resources that can be used to transmit SL information according to the sensing result.
  • the implementation method that only considers the success of LBT when selecting resources is described as method 1, and the implementation method that considers both LBT results and perceived results is described as method 2.
  • mode 1 regardless of whether UE#1 selects resources that can be used to transmit SL information based on the sensing results, UE#1 sends SL information immediately after LBT succeeds.
  • mode 2 after UE#1 selects a resource that can be used to transmit SL information based on the sensing result, if the LBT is successful, it sends SL information on the resource.
  • the above method 1 or method 2 can be enabled through resource pool level (pre) configuration or network configuration, or in other words, the method can be enabled through resource pool level (pre) configuration or network configuration. Decide to use the above method 1 or method 2 to select resources for transmitting SL information.
  • mode 1 can be used by default. If the resource pool level (pre-)configuration or network If the configuration mode enables mode 2, use mode 2.
  • mode 2 can be used by default. If mode 1 is enabled through resource pool-level (pre)configuration or network configuration, mode 1 is used.
  • UE#1 can send SL information immediately after LBT is successful, thus ensuring the fairness of access channels for various types of UEs, and at the same time helping to reduce the delay for UE#1 to send SL information.
  • Figure 10 is a schematic diagram of another example of a resource selection method provided by an embodiment of the present application.
  • the method 1000 may include S1010 to S1030.
  • the first time slot includes the time slot in which UE#1 successfully performs LBT or the time slot next to the time slot in which UE#1 successfully performs LBT.
  • S1010 and S1020 are the same as S610 and S620 in the foregoing method embodiment, so duplication is not avoided and will not be described again.
  • the following mainly takes as an example the case where the time slot when the LBT is successful is located before the time slot n+T proc , and the channel is accessed and SL information is sent immediately after the LBT is successful. That is to say, without special explanation, in this embodiment, the time slot in which UE#1 sends SL information is located before time slot n+T proc , or in other words, when UE#1 sends SL information, it has not yet Resources that can be used to transmit SL information are selected based on the sensing results.
  • S1030 UE#1 sends first control information, where the first control information is used to indicate the first reserved resource of SL information.
  • the first reserved resources are resources determined by UE#1 based on the sensing results.
  • the SL information here is the SL information sent by UE#1 on the first time slot in S1020.
  • UE#1 may send the first control information on the second time slot, where the second time slot is located after the time slot n+T proc . Therefore, UE#1 can indicate the first reserved resources of UE#1 to other UEs by sending the first control information.
  • the first control information since the first control information is sent after time slot n+T proc , that is to say, when UE#1 sends the first control information, it has selected the SL information that can be used to send the SL information based on the sensing results. resources, therefore, the first control information may be used to indicate reserved resources based on the sensing results, that is, the first reserved resources are resources determined based on the sensing results.
  • the first reserved resources are resources determined based on the sensing results, or it can also be understood that the first reserved resources do not include reserved resources of other UEs; or it can also be understood that the first reserved resources belong to the first
  • the first control information is used to indicate reserved resources based on the sensing results. It can also be understood that UE#1 considers the reserved resources of other UEs when indicating the reserved resources of UE#1's SL information through the first control information. , thereby avoiding resource collision between the first reserved resource and the reserved resources of other UEs.
  • the COT where the first reserved resource of UE#1 is located is located after the COT where the first time slot is located.
  • the first reserved resources include resources reserved by the first terminal device for the TB to be transmitted.
  • the first reserved resources include resources reserved by the first terminal device for transmitting the next TB.
  • the first reserved resources of UE#1 may include at least one of the following resources:
  • Retransmission reserved resources periodic reserved resources, periodic reserved resources for retransmission reserved resources, reserved resources within the next COT, reserved resources within the current COT, and reserved resources between COTs.
  • the current COT is the COT where the first time slot is located.
  • periodic reserved resources can be understood as reserved resources for the next TB.
  • the transmission of the next TB can be called periodic transmission of the current TB.
  • SL information can be sent through multiple TBs, including TB1 and TB2, where TB2 is the next TB of TB1 in the time domain. Therefore, for TB1, TB2 is the next TB of TB1.
  • a TB, the time slot (or resource) where TB2 is located can be called the periodic reserved resource of TB1.
  • the first control information indicates the method of reserving resources
  • UE#1 may indicate the first reserved resources to other UEs by sending the first control information in multiple ways.
  • two possible implementation methods are given below:
  • the first control information includes a first time interval, where the first time interval is a time interval between the second time slot and the time slot in which the first reserved resource is located.
  • the first control information may be used to indicate the first reserved resource on the time slot after the first time interval after the second time slot. For example, if the second time slot is located in time slot t and the first time interval is T1, then the first control information may be used to indicate the first reserved resource on time slot t+T1.
  • the first control information may also be used to indicate reserved resources for retransmission information of SL information.
  • the first control information can indicate B by indicating the value of B.
  • the first reserved resources include reserved resources for the initial transmission of information and reserved resources for the B retransmissions of information.
  • the first control information can be used to indicate the initial transmission information and B retransmission information.
  • the time interval for retransmitting information is ⁇ r1, r2,...,rB ⁇ to indicate the reserved resources for B retransmission information.
  • the time interval between the initial transmission of information and B retransmissions of information can be expressed by the value of the time interval, or by TRIV (time resource indication value), which is not limited in this application.
  • the first control information can also be used to indicate that time slots t+T1+r1 and t+T1+r2 are B retransmission information respectively.
  • reserved resources include reserved resources for the initial transmission of information and reserved resources for the B retransmissions of information.
  • the first control information includes a second time interval and a period, where the second time interval is the difference between the first time interval and the period, and the period is the period in which UE#1 sends SL information.
  • the first time interval may be represented by the sum of the second time interval and the period.
  • the second time slot is located in time slot t
  • the second time interval is T2
  • the first control information can be used to indicate the time slot t+T2+P rsvp Reserve resources first.
  • the first control information may also be used to indicate reserved resources for retransmission information of SL information.
  • time slot t+T2+P rsvp is the reserved resource for the initial transmission of SL information
  • B retransmission resources are continuously transmitted after the initial transmission resources
  • the first control information can be used to indicate the time Slots t+T2+P rsvp +1 and t+T2+P rsvp +2 are reserved resources for B retransmission messages respectively.
  • B 2
  • B retransmission resources are transmitted discontinuously after the initial transmission resources, and the time intervals between the initial transmission information and the B retransmission information are ⁇ r1, r2,...,rB ⁇ respectively, then the first control
  • the information can also be used to indicate that time slots t+T2+P rsvp +r1 and t+T2+P rsvp +r2 are reserved resources for B retransmissions of information respectively.
  • the first reserved resources include reserved resources for the initial transmission of information and reserved resources for the B retransmissions of information.
  • the first control information may also include the first time interval T1 and the period P rsvp . At this time, the first control information may also be used to indicate the first reserved resource on the time slot t+T1+q ⁇ P rsvp .
  • the first control information may also be used to indicate the first reserved resource on the time slot t+T2+q ⁇ P rsvp .
  • q is an integer greater than or equal to 1.
  • the first control information can be configured through the period field and/or other information in the first control information.
  • the field (for example, recorded as the first field) indicates the first time interval to implement the above manner 1.
  • the first control information may jointly indicate the second time interval and the period through the first field and the period field in the first control information, to implement the above manner 2.
  • the first field indicates the second time interval
  • the period field indicates the period; for another example, the first field indicates the period, and the period field indicates the second time interval.
  • a certain field may be used to indicate that the period field is used to indicate a period or a first time interval.
  • the period field indicates the period; when the second field is 1, the period field indicates the first time interval; for another example, when the second field is 1, the period field indicates the period; when the second field is 0, the period field indicates the first time interval.
  • the period field indicates the first time interval.
  • Indicating the first time interval/second time interval can also be understood as indicating the value of the first time interval/second time interval, or information indicating the first time interval/second time interval.
  • indicating a period can also be understood as indicating a period value, or information indicating a period.
  • the second time interval may be a positive value, a negative value, or 0.
  • the second time interval is smaller than the third time interval; in another possible situation, the absolute value of the second time interval is smaller than the third time interval.
  • the third time interval is, for example, c ⁇ period, where the value range of c is [0, 1].
  • the first control information can be carried in any one of SCI, MAC CE, RRC or PC-5RRC.
  • the first control information may be instructed to be carried in any one of SCI, MAC CE, RRC or PC-5RRC through pre-configuration or network configuration.
  • the first control information can be instructed to be carried on the MAC CE through preconfiguration or network configuration.
  • the first control information can be carried on the MAC CE.
  • the MAC subheader includes an LCID (Logical Channel ID) value, and the LCID value can be used to indicate that the MAC CE carries the first control information. in.
  • the decimal value corresponding to the LCID value ranges from 20 to 61 integers.
  • the first control information may be carried in the SCI.
  • the SCI includes bits used to indicate that the SCI carries first control information. As an example, when the value of this bit is 0, it indicates that the SCI is used to carry the first control information. In another example, when the value of this bit is 1, it indicates that the SCI is used to carry the first control information.
  • the first control information can be sent in the first COT or in the second COT, where the first COT is the COT where the first time slot is located, or in other words, the SL information is in the first COT. Sent within COT.
  • the first COT may also be called the current COT.
  • the first control information may be sent within the first COT, when the first time slot is located before the second time slot.
  • the first control information may be sent within the second COT, and at this time, the first COT is located before the second COT in the time domain.
  • the first control information may be sent in the same COT as the SL information on the first time slot, or may be sent in a different COT than the SL information on the first time slot.
  • the second time slot and the first time slot may be in the same COT or may be in different COTs.
  • Figures 11 and 12 respectively show schematic diagrams of sending the first control information in the first COT and sending the first control information in the second COT.
  • the first control information may be used to indicate the first reserved resource.
  • time slot n is the time slot when UE#1 starts to perform LBT
  • time slot m is the time slot when UE#1 successfully performs LBT
  • time slot n+T proc is the time slot for UE#1 #1 Selects a time slot that can be used to transmit SL information based on the sensing results.
  • the first control information may be sent within the first COT, or in other words, the second time slot and the first time slot may be within the same COT.
  • the first time slot is located before the second time slot.
  • the second time slot is located after time slot n+T proc , and the second time slot is located at the A-th time slot from the bottom of the first COT, and the value of A is, for example, 1.
  • the first control information can also be sent in the second COT, or in other words, the second time slot and the first time slot can be in different COTs.
  • the first COT is located before the second COT in the time domain.
  • the second COT may be determined through the Type 1 LBT access channel, or may be determined through the Type 2 LBT access channel, which is not limited in this application.
  • the SL information may correspond to a certain service, and in some scenarios, the SL information may also be replaced by the service corresponding to the SL information.
  • multiple different services of UE#1 can be transmitted in the same COT.
  • UE#1 can also transmit service 2 in the first COT.
  • FIGS 13 and 14 show schematic diagrams of service 1 and service 2 being transmitted within the same COT.
  • the channel occupancy time of service 1 and service 2 does not exceed the maximum channel occupancy time.
  • the priority value or CAPC of service 1 is greater than or equal to the priority value or CAPC of service 2.
  • time slot n1 is the time slot when UE#1 starts to perform LBT for service 1 (the time slot that triggers resource selection), and time slot n2 is the time slot when UE#1 starts to perform resource selection for service 2.
  • the time slot n1+T proc is the time slot of the sensing result processed according to the transmission parameters of service 1, or in other words, the time slot that can be used to transmit the resources of the service 1 is selected based on the sensing result; the time slot n2+T proc is the time slot based on The time slot of the sensing result after the transmission parameters of service 2 have been processed, or in other words, the time slot of the resource that can be used to transmit the service 2 is selected based on the sensing result.
  • service 1 performed one initial transmission (represented by TB 1-1) and two retransmissions (represented by TB 1-2 and TB 1-3 respectively) in the first COT.
  • Service 2 performed one initial transmission (indicated by TB 2-1) and one retransmission (indicated by TB 2-2) in the first COT.
  • the first control information of service 1 (for example, SCI 1 carried in Figures 13 and 14) is sent after time slot n1+T proc .
  • the first control information of service 1 can be transmitted in the same COT as service 1 (as shown in Figure 13), or can be transmitted in a different COT as service 1 (as shown in Figure 14).
  • the first control information of service 1 may be used to indicate the first reserved resource of service 1.
  • Figures 13 and 14 only show some of the first reserved resources of service 1 (such as the periodic reserved resources of TB 1-1).
  • the first control information of service 2 (for example, SCI 2 carried in Figures 13 and 14) is sent after time slot n2+T proc .
  • the first control information of service 2 can be transmitted in the same COT as service 2 (as shown in Figure 13), or can be transmitted in a different COT as service 2 (as shown in Figure 14).
  • the first control information of service 2 may be used to indicate the first reserved resource of service 2.
  • Figures 13 and 14 only show some of the first reserved resources of Service 2 (such as the periodic reserved resources of TB 2-1)
  • service 1, service 2, the first control information of service 1, and the first control information of service 2 are in The transmission sequence in the time domain can take many forms.
  • the transmission sequence may be: A transmission of service 1, the first control information of service 1, B transmission of service 2, and the first control information of service 2; it may also be: A transmission of service 1, The B transmission of service 2, the first control information of service 1, and the first control information of service 2.
  • a and B are positive integers.
  • A is 3 and B is 2.
  • the first control information of multiple services can be sent in the same time slot.
  • the first control information of service 1 and the first control information of service 2 can be sent by the same time slot.
  • a SCI bearer The first control information of multiple services can also be sent in different time slots.
  • the first control information of service 1 and the first control information of service 2 can be carried by different SCIs respectively.
  • the first control information of multiple services can be sent in the same time slot.
  • the two MAC CEs are sent in one time slot, and the two MAC CEs can Carrying the first control information of service 1 and the first control information of service 2 respectively.
  • the first control information of multiple services can also be sent in different time slots.
  • service 2 by transmitting multiple services (for example, service 1 and service 2) in the same COT, service 2 can be prevented from re-accessing the channel according to type 1 LBT, thereby reducing the channel access time.
  • multiple services for example, service 1 and service 2
  • service 2 can be prevented from re-accessing the channel according to type 1 LBT, thereby reducing the channel access time.
  • the SL information includes second control information
  • the second control information may be used to indicate the second reserved resources of UE#1.
  • the SL information includes the second control information. It can also be understood that the resource carrying the SL information is also a resource carrying the second control information.
  • the SL information is sent before time slot n+T proc , that is to say, the second control information is sent before time slot n+T proc , or in other words, UE#1 is sent before time slot n+T proc.
  • the second control information resources that can be used to send the SL information have not been selected based on the sensing results.
  • an optional implementation manner is that the second control information is not used to indicate periodic resource reservation to avoid reserving resources for other UEs, that is, to avoid inappropriate resource reservation.
  • the period field of the second control information may be a fixed value, such as 0, or the period field of the second control information may be omitted or invalid.
  • the second control information is used to indicate reserved resources within the current COT (for example, the first COT), or in other words, the second reserved resources are located within the current COT.
  • the second control information may be used to indicate at least one of the following reserved resources, or in other words, the second reserved resource may include at least one of the following reserved resources:
  • the current COT is the COT where the first time slot is located.
  • UE#1 since UE#1 has not selected resources that can be used by UE#1 to send SL information based on the sensing results when sending the second control information, UE#1 can indicate the current COT through the second control information. of reserved resources without indicating the reserved resources in the next COT through the second control information, thereby helping to avoid reserving resources for other UEs, that is, avoiding inappropriate resource reservation.
  • the second control information may also include at least one of physical layer priority, DMRS pattern (pattern) and other information.
  • the SL information includes PSCCH and PSSCH, where the PSCCH can be used to carry the second control information, and the PSSCH can be used to carry the data information.
  • the second control information may be carried by first-order SCI, for example.
  • the first-order SCI may include bits used to indicate that the first-order SCI carries second control information. As an example, when the value of this bit is 0, it indicates that the first-order SCI is used to carry second control information. In another example, when the value of this bit is 1, it indicates that the first-order SCI is used to carry second control information.
  • a certain bit in the first-order SCI may be used to indicate that the first-order SCI is used to carry the first control information or the second control information. For example, when the value of this bit is 0, it means that the first-order SCI is used to carry the second control information; when the value of the bit is 1, it means that the first-order SCI is used to carry the first control information. In another example, when the value of the bit is 1, it means that the first-order SCI is used to carry the second control information; when the value of the bit is 1, it means that the first-order SCI is used to carry the first control information.
  • a certain field for example, recorded as a third field
  • the first-order SCI is used to carry the first control information or the second control information.
  • the third field is omitted (omit)
  • the first-order SCI is used to carry the first control information
  • the third field is present, the first-order SCI is used to carry the second control information.
  • the first-order SCI is used to carry the first control information or the second control information according to whether a certain field (for example, recorded as the third field) is 0 bit. For example, if the third field is 0 bit, the first-order SCI is used to carry the first control information; if the third field is not 0 bit, the first-order SCI is used to carry the second control information.
  • a certain field for example, recorded as the third field
  • the first control information is used to indicate the first reserved resource of the SL information. It can also be understood that the first control information is used to indicate the first reserved resource of the data in the resource where the second control information is located. Reserve resources.
  • the way in which the first reserved resource of the data in the resource where the second control information is located is indicated by the first control information may be: the identification information indicated by the first control information is the same as the identification information indicated by the second control information, or , the identification information indicated by the first control information is the same as part of the identification information indicated by the second control information, or part of the bits of the identification information indicated by the first control information is the same as the identification information indicated by the second control information.
  • the first control information is carried by the first-order SCI, then the identification information indicated by the first control information can also be understood as the first control information indicates the second-order SCI, and the second-order SCI includes the identification information; another In one possible situation, the first control information is carried by the first-order SCI and the second-order SCI, then the identification information indicated by the first control information can also be understood as the identification information included in the second-order SCI.
  • the first control information is carried by the first-order SCI
  • the identification information indicated by the first control information can also be understood as the first control information indicates the second-order SCI, which The identification information included in the second-order SCI
  • the first control information is carried by the first-order SCI and the second-order SCI
  • the identification information indicated by the first control information can also be understood as the identification information included in the second-order SCI. Identification information.
  • the first control information may indicate at least one of the following identification information: first source ID information, first destination ID information, and first UE ID information.
  • the second control information may indicate at least one of the following identification information: second source ID information, second destination ID information, and second UE ID information.
  • the first reserved resource indicating the data in the resource where the second control information is located through the first control information may include the following situations:
  • Case 1 The first source ID information and the first destination ID information are respectively the same as the second source ID information and the second destination ID information; or the first source ID information and the first destination ID information are respectively the same as the second source ID information. Part of the bits of the information and part of the second destination ID information are the same; or part of the bits of the first source ID information and part of the first destination ID information are respectively the same as those of the second source ID information and the second destination.
  • the ID information is the same.
  • the first source ID information, the first destination ID information, and the first UE ID information are respectively related to the second source ID information.
  • information, the second destination ID information, and the second UE ID information are the same; or, the first source ID information, the first destination ID information, and the first UE ID information are respectively the same as some bits of the second source ID information, the second destination Part of the bits of the ID information and part of the second UE ID information are the same; or part of the bits of the first source ID information, part of the first destination ID information, and part of the first UE ID information, They are respectively the same as the second source ID information, the second destination ID information, and the second UE ID information.
  • UE#1 when LBT is successful, UE#1 may not have selected resources that can be used to transmit SL information based on the sensing results. Therefore, UE#1 may send SL information first, or access the channel first, Until resources that can be used to transmit SL information are selected according to the sensing results, the first control information is sent to indicate its reserved resources to other UEs. Since UE#1 considers the sensing results, or the reserved resources of other UEs, when indicating the reserved resources through the first control information, it can avoid the conflict between the reserved resources of UE#1 and the reserved resources of other UEs. A resource collision occurred.
  • the following describes a method for other UEs (eg, UE#2) to exclude the reserved resources of UE#1 based on the first control information and/or the second control information sent by UE#1 with reference to FIGS. 15 to 20 .
  • Figure 15 is a schematic diagram of another example of the resource selection method provided by the embodiment of the present application.
  • the method 1500 may include S1510 to S1540.
  • UE#2 receives the first control information from UE#1.
  • the first control information is used to indicate the first reserved resource of UE#1.
  • the first reserved resource is the same as the first reserved resource sent by UE#1 in the first time slot.
  • One SL information is related, wherein the first time slot includes the time slot in which UE#1 successfully performs LBT or the time slot next to the time slot in which UE#1 successfully performs LBT.
  • UE#2 (ie, an example of the second terminal device) receives the first control information from UE#1. It can also be understood that UE#2 detects the first control information from UE#1.
  • the first control information is used to indicate the first reserved resources of UE#1. It can also be understood that the first control information is used to indicate the first reserved resources of the SL information sent by UE#1.
  • the first reserved resource is related to the first SL information sent by UE#1 in the first time slot. It can be understood that the first reserved resource is reserved for the first SL information in the first time slot, In other words, the first reserved resource is the reserved resource for the first SL information on the first time slot.
  • the COT where the first reserved resource is located is located after the COT where the first time slot is located.
  • UE#1 may first send the first SL information on the first time slot, and then indicate the first reserved resource through the first control information. For example, UE#1 may send the first control information after selecting resources that can be used to transmit the first SL information according to the sensing result, thereby avoiding inappropriate resource reservation.
  • the first control information may be, for example, the first control information in S1030 of the foregoing method embodiment.
  • the first control information please refer to S1030 in the foregoing method embodiment. To avoid duplication, details will not be described here.
  • S1520: UE#2 determines, according to the first control information, resources other than the first reserved resources for sending the second A resource for SL information.
  • resources for sending the second SL information are determined among resources other than the first reserved resources, or it can also be understood as sending the second SL information on resources other than the first reserved resources.
  • UE#1 determines resources for sending the second SL information in resources other than the first reserved resources, for example, : UE#2 excludes the first reserved resources of UE#1 from the candidate resource set of UE#2 according to the first control information to prevent UE#2 from sending the second SL information on the first reserved resources of UE#1 resource collisions.
  • the first reserved resources include reserved resources after the first time interval after the time slot in which the first control information is located.
  • time slot in which the first control information is located can also be understood as the time slot occupied by the first control information, or can also be understood as the time slot when UE#1 sends the first control information.
  • UE#2 may exclude the first reserved resources of UE#1 based on the first control information.
  • two possible implementation methods are introduced below:
  • the first control information includes the first time interval.
  • UE#2 may exclude the first reserved resources after the first time interval after the time slot in which the first control information is located based on the first control information. For example, the time slot in which the first control information is located is time slot t, and the first time interval is T1, then UE#2 can exclude the first reserved resource at time slot t+T1 according to the first control information.
  • FIG. 16 shows an example of excluding the first reserved resources of UE#1 according to method 1.
  • the first time interval is T1
  • UE#1 can exclude the first reserved resource of UE#1 (that is, the time slot where TB 2 is located) based on T1.
  • the time slot in which TB 2 is located can also be called the periodic reserved resource of TB 1.
  • the first reserved resources may include reserved resources for initial transmission information of the first SL information and reserved resources for B retransmission information.
  • time slot t+T1 is the reserved resource for the initial transmission of the first SL information.
  • first control information also indicates reserved resources for B retransmission information, then UE# 2.
  • B 2
  • B retransmission information is transmitted discontinuously after the initial transmission information
  • the first control information indicates that the time interval between the initial transmission information and the B retransmission information is ⁇ r1, r2 ⁇ , then UE# 2.
  • the first reserved resources at time slots t+T1+r1 and t+T1+r2 may be excluded according to the first control information.
  • the first control information includes a second time interval and a period, where the second time interval is the difference between the first time interval and the period.
  • the first time interval may be represented by the sum of the second time interval and the period.
  • the time slot in which the first control information is located is time slot t
  • the second time interval is T2
  • UE#2 can exclude the time slot according to the first control information.
  • t+T2+P The first reserved resource at rsvp .
  • time slot t+T2+P rsvp is the reserved resource for the initial transmission of the first SL information.
  • first control information also indicates the reserved resources for B retransmission information
  • B 2
  • B retransmission information is transmitted discontinuously after the initial transmission information
  • the first control information indicates that the time interval between the initial transmission information and the B retransmission information is ⁇ r1, r2 ⁇
  • UE# 2 can be based on the One control information excludes the first reserved resources at time slots t+T2+P rsvp +r1 and t+T2+P rsvp +r2.
  • UE#2 can also exclude the first time slot t+T1+q ⁇ P rsvp according to the first control information. Reserve resources.
  • UE#2 may also exclude the first reserved resource at the time slot t+T2+q ⁇ P rsvp according to the first control information.
  • q is an integer greater than or equal to 1.
  • the first reserved resource is located within the resource selection window of UE#2, or in other words, the first reserved resource belongs to the candidate resource set of UE#2, then UE#1 excludes the first reserved resource,
  • UE#2 excludes the first reserved resource.
  • the first signal strength threshold is related to the physical layer priority of UE#1 and/or the physical layer priority of UE#2.
  • method 1500 may also include S1530, UE#2 receives second control information from UE#1, the second control information is used to indicate the second reserved resources of UE#1, where the second reserved resources are The first time slot is located within the same COT.
  • the second control information may be, for example, the second control information in S1030 of the foregoing method embodiment.
  • the second control information please refer to S1030 in the foregoing method embodiment. To avoid duplication, it will not be described again here.
  • method 1500 may also include S1540, where UE#2 determines resources for sending the second SL information among resources other than the second reserved resources according to the second control information.
  • resources for sending the second SL information are determined among resources other than the second reserved resources, or it can also be understood that the second SL information is sent on resources other than the second reserved resources.
  • UE#2 when UE#2 selects the resource to send the second SL information, it not only needs to exclude the first reserved resource of UE#1 based on the first control information, but also needs to exclude the first reserved resource of UE#1 based on the second control information.
  • the control information excludes the second reserved resources of UE#1.
  • UE#2 can use the reserved resources (for example, the first Resources used to send the second SL information are determined among resources other than reserved resources (for example, second reserved resources), so it is possible to avoid sending the second SL information on the reserved resources of UE#1, thereby improving Reliability of the first SL information sent by UE#1.
  • the reserved resources for example, the first Resources used to send the second SL information are determined among resources other than reserved resources (for example, second reserved resources), so it is possible to avoid sending the second SL information on the reserved resources of UE#1, thereby improving Reliability of the first SL information sent by UE#1.
  • Figure 17 is a schematic diagram of another example of the resource selection method provided by the embodiment of the present application.
  • the method 1700 may include S1710 and S1720.
  • UE#2 receives control information from UE#1.
  • the control information is used to indicate the reserved resources of UE#1.
  • the control information from UE #1 can be at least one of the following control information.
  • the reserved resources in this embodiment may be, for example, at least one of the following reserved resources: the first reserved resource in S1030, the second reserved resource in S1030, and other reserved resources indicated by the control information. resources, there is no limit on this.
  • S1720 UE#2 determines the username among resources other than the reserved resources and first resources of UE#1 according to the control information. For resources for sending SL information, the first resource is adjacent to the reserved resource of UE#1 in the time domain.
  • UE#2 may determine resources for sending SL information in resources other than the reserved resources and first resources of UE#1 according to the control information from UE#1, so as to avoid UE#2
  • the SL information is sent on the reserved resources and first resources of UE#1.
  • UE#2 not only needs to satisfy the requirements of determining resources for sending SL information among resources other than the reserved resources of UE#1, but also needs to satisfy the requirements of determining resources for sending SL information among resources other than the first resources.
  • the resource used to send SL information is determined in the resource.
  • UE#2 not only needs to exclude the reserved resources of UE#1, but also needs to additionally exclude resources adjacent to the reserved resources in the time domain.
  • UE#2 determines resources for sending SL information among resources other than the reserved resources and first resources of UE#1, which can be implemented in any of the following ways:
  • UE#2 excludes the reserved resources and first resources of UE#1 from the candidate resource set of UE#2; or, UE#2 sends SL on resources other than the reserved resources and first resources of UE#1 information; or, UE#2 sends the SL information after the time slot where the reserved resources of UE#1 and the first resource are located; or, UE#2 cancels the COT in the time slot where the reserved resources of UE#1 and the first resource are located.
  • SL transmission within; or, the starting position of the resource selection window of UE#2 is located after the time slot where the reserved resources and the first resource of UE#1 are located.
  • the time slot in which the first resource is located is a preset period adjacent to the time slot in which the reserved resource of UE#1 is located, or in other words, the first resource and the reserved resource of UE#1 are adjacent in the time domain.
  • the time slot in which the first resource is located may be a preset period before the time slot in which the reserved resource of UE#1 is located.
  • time slot in which the first resource is located can also be understood as the time slot occupied by the reserved resource; the time slot in which the reserved resource is located can also be understood as the time slot occupied by the reserved resource.
  • UE#2 Since UE#2 sends SL information within the preset period before the time slot where the reserved resource is located, the LBT of UE#1 before the time slot where the reserved resource is located may fail, resulting in UE#1 being unable to perform the LBT before the reserved resource.
  • SL information is sent on the reserved resources. Therefore, by additionally excluding the preset period before the time slot where the reserved resources are located, it is helpful to avoid the failure of UE#1 to perform LBT before the time slot where the reserved resources are located, thereby improving the efficiency of UE#1 Reliability of sending SL information.
  • the time slot in which the first resource is located may also be a preset period after the time slot in which the reserved resource of UE#1 is located.
  • UE#2 can additionally exclude the preset time period after the time slot where the reserved resources are located. In this way, Even if UE#1 cannot send SL information on the reserved resources of UE#1, because UE#2 excludes the preset period after the time slot where the reserved resources are located, if UE#1 is located where the reserved resources are located If the LBT is successfully performed within the preset period after the time slot, the channel can still be accessed and SL information can be sent successfully, thereby improving the success rate and reliability of UE#1 sending SL information.
  • the first resource may also include a preset period before the time slot where the reserved resources of UE#1 are located, and a preset period after the time slot where the reserved resources of UE#1 are located.
  • FIG. 18 shows an example of excluding reserved resources and first resources of UE#1.
  • the first resource includes a preset period before the time slot where the reserved resources of UE#1 are located, and a preset period after the time slot where the reserved resources of UE#1 are located.
  • UE#2 may exclude the reserved resources and first resources of UE#1 in the following manner:
  • UE#2 determines the end position of UE#2's COT in the time domain based on the reserved resources of UE#1 and the time slot in which the first resource is located. For example, when the time slot in which the first resource is located is a preset period before the time slot in which the reserved resource of UE#1 is located, UE#2 may determine the end position of the COT to be before the time slot in which the first resource is located. For another example, when the time slot where the first resource is located is a preset period after the time slot where the reserved resources of UE#1 are located, UE#2 can determine the end position of the COT to be before the time slot where the reserved resources of UE#1 are located. .
  • the first resource also includes a preset period before the timeslot where the reserved resource of UE#1 is located, and the preset period after the time slot where the reserved resources of UE#1 are located
  • UE#2 can determine the end position of the COT to be before the preset period before the time slot where the reserved resources of UE#1 are located. Therefore, UE#2 can be prevented from sending SL information in the time slot where the reserved resources and the first resource of UE#1 are located.
  • UE#2 can also exclude the reserved resources and first resources of UE#1 in one of the following ways: UE#2 excludes the reserved resources of UE#1 from the channel. The time slot in which the reserved resource is located and the time slot in which the first resource is located are used, and LBT is not performed; or, UE#2 determines the time or period for UE#2 to perform LBT based on the reserved resource of UE#1 and the time slot in which the first resource is located; Alternatively, UE#2 does not measure whether the channel is occupied in the time slot where the reserved resource of UE#1 is located and the time slot where the first resource is located.
  • not performing LBT can include the following two situations:
  • Case 1 UE#2 does not perform LBT in the time slot where the reserved resources of UE#1 are located and the time slot where the first resource is located, until it starts to perform LBT after the time slot where the reserved resources of UE#1 and the first resource are located.
  • Case 2 UE#2 performs LBT before the time slot where the reserved resource of UE#1 is located and the time slot where the first resource is located (LBT has not yet succeeded), but it is not performed before the time slot where the reserved resource of UE#1 is located and or The time slot where the first resource is located suspends execution of LBT, that is, UE#2 suspends execution of LBT after starting to execute LBT.
  • FIG. 19 shows another schematic diagram excluding reserved resources and first resources of UE#1.
  • the first resource includes a preset period before the timeslot in which the reserved resource of UE#1 is located.
  • UE#2 does not perform LBT in the time slot where the reserved resources and the first resource of UE#1 are located. LBT is performed until the time slot where the reserved resources of UE#1 and the first resource are located.
  • FIG. 20 shows another schematic diagram excluding reserved resources and first resources of UE#1.
  • the first resource includes a preset period before the timeslot in which the reserved resource of UE#1 is located.
  • UE#2 performs LBT before the time slot where the reserved resources of UE#1 and the first resource are located (LBT has not yet succeeded), but before the time slot where the reserved resources and the first resource of UE#1 are located. Perform LBT. In other words, UE#2 suspends performing LBT in the time slot where the reserved resources of UE#1 and the first resource are located.
  • suspending the execution of LBT can be implemented, for example, by suspending the LBT counter (the value of the LBT counter does not decrease).
  • the time slot in which UE#2 sends SL information is the time slot in which UE#2 successfully performs LBT or the time slot next to the time slot in which UE#2 successfully performs LBT, therefore, according to the method of this embodiment, UE#2 LBT is not performed in the time slot where the reserved resources and first resources of UE#1 are located, which can prevent UE#2 from sending SL information on the reserved resources and first resources of UE#1, thereby preventing UE#1 from failing to perform LBT. Therefore, The reliability of UE#1 sending SL information is improved.
  • the first resource may include multiple time slots; alternatively, the first resource may include multiple resources, and the resource may be a time slot.
  • UE#2 may determine the first priority based on at least one of the physical layer priority of UE#1, the CAPC of UE#1, the physical layer priority of UE#2, and the CAPC of UE#2.
  • the time domain length of the resource can also be understood as the length of time occupied by the first resource in the time domain.
  • the physical layer priority and/or CAPC of UE#1 may be carried in the control information of UE#1.
  • the time domain length of the first resource is related to the CAPC of UE#1 and/or the CAPC of UE#2.
  • the smaller the CAPC value of UE#2 the shorter the time domain length of the first resource.
  • the time domain length of the first resource is related to the priority of UE#1 and/or the priority of UE#2.
  • the first resource is a preset period before the time slot where the reserved resources of UE#1 are located or a preset period after the timeslot where the reserved resources of UE#1 are located, then the time domain length of the first resource can satisfy T f +m p ⁇ T sl +N ⁇ T sl .
  • the first resource includes both the preset period before the timeslot where the reserved resources of UE#1 are located, and the preset period after the timeslot where the reserved resources of UE#1 are located, then the time domain length of the first resource is It can satisfy T f +m p ⁇ T sl +N ⁇ T sl or T f +m p ⁇ T sl +N ⁇ T sl +C.
  • the value of m p can be determined according to the CAPC of UE#1
  • the value of N can be CW min, CW max , or a random number in the range of [0, CW p ], CW min, CW max , or CW p may be determined according to the CAPC of UE#1.
  • C is a constant.
  • C can be different constants under different SCS.
  • UE#2 may exclude the first resource when at least one of the following conditions is met: the physical layer priority value of UE#1 is less than the first priority value, and the CAPC of UE#1 is less than the second priority value. value, the physical layer priority value of UE#1 is smaller than the physical layer priority value of UE#2, and the CAPC of UE#1 is smaller than the CAPC of UE#2.
  • UE#2 may exclude the first resource when the channel busy ratio (CBR) is lower than the first congestion threshold, or the inter-system CBR is lower than the second congestion threshold.
  • CBR channel busy ratio
  • the first priority value, the second priority value, the first congestion threshold, or the second congestion threshold may be numerical values, or may also be numerical ranges, without limitation.
  • the first priority value, the second priority value, the first congestion threshold, or the second congestion threshold may be a fixed value predefined by the protocol, or may be a value generated according to a predefined rule, or may be Preconfigured fixed values, or dynamically configured values, are not restricted.
  • UE#2 can not only exclude the reserved resources of UE#1 according to the control information from UE#1, but also exclude the first resource.
  • the first resource is the preset period before the time slot where the reserved resource of UE#1 is located, it is helpful to avoid the failure of UE#1 to perform LBT before the time slot where the reserved resource is located, thereby improving the efficiency of UE#1 in sending SL information. reliability.
  • the first resource is the preset period after the time slot where the reserved resource of UE#1 is located
  • UE#1 fails to perform LBT before the time slot of the reserved resource or in the time slot of the reserved resource, still
  • the SL information can be sent according to the LBT result within a preset period after the time slot where the reserved resource is located, thereby improving the success rate and reliability of UE#1 sending SL information.
  • the methods and operations implemented by the terminal device can also be implemented by components of the terminal device (such as chips or circuits). ) to achieve without limitation.
  • embodiments of the present application also provide corresponding devices, and the devices include modules for executing corresponding modules in each of the above method embodiments.
  • the module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above method embodiments are also applicable to the following device embodiments.
  • FIG. 21 is a schematic block diagram of a resource selection device provided by an embodiment of the present application.
  • the device 2100 includes a transceiver unit 2110 and a processing unit 2120.
  • the transceiver unit 2110 can be used to implement corresponding communication functions, such as sending sideline information.
  • the transceiver unit 2110 may also be called a communication interface or communication unit.
  • the processing unit 2120 can be used to implement corresponding processing functions, such as executing LBT.
  • the device 2100 also includes a storage unit, which can be used to store instructions and/or data, and the processing unit 2120 can read the instructions and/or data in the storage unit, so that the device implements each of the foregoing method embodiments. action of the first terminal device or the second terminal device.
  • a storage unit which can be used to store instructions and/or data
  • the processing unit 2120 can read the instructions and/or data in the storage unit, so that the device implements each of the foregoing method embodiments. action of the first terminal device or the second terminal device.
  • the device 2100 may be UE#1 in the aforementioned embodiment, or may be a component (such as a chip) of UE#1.
  • the device 2100 can implement steps or processes corresponding to those performed by UE#1 in the above method embodiment, wherein the transceiver unit 2110 can be used to perform operations related to the transceiver of UE#1 in the above method embodiment, and the processing unit 2120 can To perform operations related to the processing of UE#1 in the above method embodiment.
  • the transceiver unit 2110 may be a transceiver, or an input/output interface; the processing unit 2120 may be at least one processor.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the transceiver unit 2110 may be an input/output interface, interface circuit, output circuit, input circuit, pin or related information on the chip, chip system or circuit. circuit, etc.; the processing unit 2120 may be at least one processor, processing circuit or logic circuit, etc.
  • the processing unit 2120 is used to perform listen-before-talk LBT; the transceiver unit 2110 is used to send sideline information in the first time unit.
  • the first time unit includes the location where UE#1 successfully performs LBT. time unit or the next time unit of the time unit when UE#1 successfully performs LBT.
  • the transceiver unit 2110 is also configured to send sideline information in the first time unit and at least one time unit after the first time unit.
  • the transceiver unit 2110 is also configured to send the first control information on the second time unit.
  • the first control information is used to indicate the first reserved resource of the sideline information, where the first reserved resource is UE# 1Resources determined based on sensing results.
  • the channel occupancy time COT where the first reserved resource is located is located after the COT where the first time unit is located.
  • the first control information includes a first time interval, where the first time interval is a time interval between the second time unit and the time unit where the first reserved resource is located; or the first control information includes a second time interval.
  • the time interval and the period, where the second time interval is the difference between the first time interval and the period, and the period is the period in which UE#1 sends sidelink information.
  • the second time unit is located within the first COT, where the first COT is the COT where the first time unit is located, and the first time unit is located before the second time unit; or the second time unit is located within the second COT. , where the first COT is located before the second COT.
  • the sidelink information includes second control information, the second control information is used to indicate the second reserved resources of UE#1, and the second reserved resources are located in the same COT as the first time unit.
  • the identification information indicated by the first control information is the same as the identification information indicated by the second control information; or, the identification information indicated by the first control information is part of the bits of the identification information indicated by the second control information; or, Part of the bits of the identification information indicated by one control information is the identification information indicated by the second control information.
  • the first time unit is a resource determined by UE#1 according to the sensing result.
  • the processing unit 2120 is also configured to perform LBT successfully at least once.
  • the device 2100 may be UE#2 in the aforementioned embodiment, or may be a component (such as a chip) of UE#2.
  • the device 2100 can implement steps or processes corresponding to those performed by UE#2 in the above method embodiment, wherein the transceiver unit 2110 can be used to perform operations related to the transceiver of UE#2 in the above method embodiment, and the processing unit 2120 can To perform operations related to the processing of UE#2 in the above method embodiment.
  • the transceiver unit 2110 may be a transceiver, or an input/output interface; the processing unit 2120 may be at least one processor.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the transceiver unit 2110 may be an input/output interface, interface circuit, output circuit, input circuit, pin or related information on the chip, chip system or circuit. circuit, etc.; the processing unit 2120 may be at least one processor, processing circuit or logic circuit, etc.
  • the transceiver unit 2110 is configured to receive the first control information from UE#1.
  • the first control information is used to indicate the first reserved resources of the UE#1.
  • the first reserved resources are related to the UE#1.
  • the first sideline information sent by #1 in the first time unit is related, where the first time unit includes the time unit where UE#1 successfully performs LBT or the next time unit of the time unit where UE#1 successfully performs LBT. ;
  • the processing unit 2120 is configured to determine resources for sending the second sideline information among resources other than the first reserved resources according to the first control information.
  • processing unit 2120 is also configured to exclude the first reserved resource from the candidate resource set.
  • the first reserved resource is a resource determined by UE#1 according to the sensing result.
  • the channel occupancy time COT where the first reserved resource is located is located after the COT where the first time unit is located.
  • the first reserved resources include reserved resources after the first time interval after the time unit in which the first control information is located.
  • the first control information includes: a first time interval; or a second time interval and a period, where the second time interval is the difference between the first time interval and the period, and the period is when UE#1 sends the first The period of row information.
  • the transceiver unit 2110 is used to receive control information from UE#1, and the control information is used to indicate the reserved resources of UE#1; the processing unit 2120 is used to, according to the control information, in addition to the reserved resources Resources used to send sidelink information are determined among resources other than the first resource and the first resource, where the first resource and the reserved resource are adjacent in the time domain.
  • the first resource and the reserved resource are adjacent in the time domain, including: the time unit where the first resource is located is a preset period before the time unit where the reserved resource is located; or the time unit where the first resource is located is the reserved resource.
  • a preset period after the time unit where the resource is located; or, the time unit where the first resource is located includes a preset period before the time unit where the reserved resource is located and a preset period after the time unit where the reserved resource is located.
  • processing unit 2120 is also configured to exclude reserved resources and first resources from the candidate resource set.
  • the processing unit 2120 is also configured to not perform LBT in the time unit where the reserved resource is located and the time unit where the first resource is located; or, the processing unit 2120 is also configured to not perform LBT between the time unit where the reserved resource is located and the first resource. In the time unit, whether the channel is occupied is not measured.
  • the device 2100 here is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor, or a group of processors) used to execute one or more software or firmware programs. processor, etc.) and memory, merged logic circuitry, and/or other suitable components to support the described functionality.
  • ASIC application specific integrated circuit
  • the device 2100 can be specifically UE#1 in the above embodiments, and can be used to perform various processes and/or steps corresponding to UE#1 in the above method embodiments. ;
  • the device 2100 may be specifically UE#2 in the above embodiments, and may be used to execute various processes and/or steps corresponding to UE#2 in the above method embodiments. To avoid duplication, they will not be described again.
  • the apparatus 2100 of each of the above solutions has the function of implementing the corresponding steps performed by the device (such as UE#1, or UE#2) in the above method.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiving unit. (machine replacement), other units, such as processing units, etc., can be replaced by processors to respectively perform the sending and receiving operations and related processing operations in each method embodiment.
  • transceiver unit 2110 may also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit 2120 may be a processing circuit.
  • the device in Figure 21 may be the device in the previous embodiment (such as UE#1, or UE#2), or it may be a chip or a chip system, such as a system on chip (SoC).
  • the transceiver unit may be an input-output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. No limitation is made here.
  • this embodiment of the present application provides another communication device 2200.
  • the device 2200 includes a processor 2210.
  • the processor 2210 is configured to execute computer programs or instructions stored in the memory 2220, or read data/signaling stored in the memory 2220, to perform the methods in each of the above method embodiments.
  • the device 2200 further includes a memory 2220, which is used to store computer programs or instructions and/or data.
  • the memory 2220 may be integrated with the processor 2210, or may be provided separately.
  • the device 2200 also includes a transceiver 2230, which is used for receiving and/or transmitting signals.
  • the processor 2210 is used to control the transceiver 2230 to receive and/or transmit signals.
  • the device 2200 is used to implement the operations performed by UE#1 in each of the above method embodiments.
  • the processor 2210 is used to execute computer programs or instructions stored in the memory 2220 to implement related operations of UE#1 in each of the above method embodiments.
  • the device 2200 is used to implement the operations performed by UE#2 in each of the above method embodiments.
  • the processor 2210 is used to execute computer programs or instructions stored in the memory 2220 to implement related operations of UE#2 in each of the above method embodiments.
  • processors mentioned in the embodiments of this application may be a central processing unit (CPU), or other general-purpose processor, digital signal processor (DSP), or application-specific integrated circuit (ASIC).
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • non-volatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically removable memory. Erase electrically programmable read-only memory (EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache.
  • RAM includes the following forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), Double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) and direct Memory bus random access memory (direct rambus RAM, DR RAM).
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.
  • Embodiments of the present application also provide a computer-readable storage medium on which are stored computer instructions for implementing the methods executed by the device (such as UE#1, or UE#2) in each of the above method embodiments.
  • the computer program when executed by a computer, the computer can implement the method executed by UE#1 in each embodiment of the above method.
  • the computer program when executed by a computer, the computer can implement the method executed by UE#2 in each embodiment of the above method.
  • Embodiments of the present application also provide a computer program product, which includes instructions.
  • the instructions are executed by a computer, the methods executed by the device (such as UE#1, or UE#2) in each of the above method embodiments are implemented.
  • An embodiment of the present application also provides a communication system, including the aforementioned UE#1 and UE#2.
  • the disclosed devices and methods can be used through other way to achieve.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer may be a personal computer, a server, or a network device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated.
  • the available media may be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as DVDs), or semiconductor media (such as solid state disks (SSD)), etc.
  • the aforementioned available media include but Not limited to: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code.

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Abstract

本申请提供了一种资源选择的方法和装置，该方法包括：第一终端设备执行先听后说LBT；第一终端设备在第一时间单元上发送侧行信息，第一时间单元包括所述第一终端设备执行LBT成功时所在的时间单元或第一终端设备执行LBT成功时所在时间单元的下一个时间单元。根据本申请提供的技术方案，终端设备通过根据LBT结果确定用于传输侧行信息的资源，因此有利于保证各类终端设备接入信道的公平性。

Description

一种资源选择的方法和装置
本申请要求于2022年4月29日提交中国国家知识产权局、申请号为202210476430.5、申请名称为“一种资源选择的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种资源选择的方法和装置。
背景技术
在非授权频谱上通信需要遵守某些规定，例如先听后说(listen-before-talk，LBT)，以保证在该频谱上通信的各类用户设备(user equipment，UE)接入信道的公平性。
在目前的侧行(sidelink，SL)通信技术中，例如在新无线(new radio，NR)的SL通信技术中，使用的频谱为授权频谱或专用频谱，未考虑非授权频谱的相关规定，因此，目前的SL通信技术无法与非授权频谱上的通信技术很好地融合。例如，在NR的SL通信场景中，UE仅根据资源感知结果选择用于设备间通信的资源，不遵循LBT，因此，在非授权频谱上进行SL通信时，无法保证各类UE接入信道的公平性。
发明内容
本申请提供一种资源选择的方法和装置，该方法例如可用于侧行非授权频谱(sidelink on unlicensed spectrum，SL-U)场景下的通信。该方法通过根据LBT结果确定用于传输侧行信息的资源，能够保证各类UE接入信道的公平性。
第一方面，提供了一种资源选择的方法，该方法可以由终端设备执行，或者，也可以由配置于终端设备中的芯片或芯片系统或电路执行，本申请对此不做限制。为了便于描述，下面以由第一终端设备执行为例进行说明。
该方法可以包括：第一终端设备执行先听后说LBT；第一终端设备在第一时间单元上发送侧行信息，第一时间单元包括第一终端设备执行LBT成功时所在的时间单元或第一终端设备执行LBT成功时所在时间单元的下一个时间单元。
其中，时间单元例如可以为时隙。
其中，侧行信息可以包括PSCCH、PSSCH、PSFCH中的至少一种。
其中，PSCCH可用于承载控制信息，PSSCH可用于承载控制信息和/或数据，PSFCH可用于承载反馈信息，因此，侧行信息包括PSCCH、PSSCH、PSFCH中的至少一种，还可以理解为，侧行信息包括侧行数据信息、侧行控制信息、侧行反馈信息中的至少一种。
在本实施例中，第一终端设备可从时间单元n开始执行LBT，或者说，执行信道接入，从而，第一终端设备可根据执行LBT的结果选择发送侧行信息的资源。具体地，若LBT成功，则第一终端设备可接入信道并在第一时间单元上发送侧行信息。其中，第一时间单元包括第一终端设备执行LBT成功时所在的时隙或第一终端设备执行LBT成功时所在时 隙的下一个时隙。
其中，LBT成功时所在的时隙，也可以理解为，LBT计数器N＝0的时隙。
一种可能的情况，LBT成功时所在的时隙能够用于发送侧行信息。例如，LBT成功的时刻位于该时隙的起始位置，则第一时隙包括LBT成功时所在的时隙。
另一种可能的情况，LBT成功时所在的时隙不能够用于发送侧行信息。例如，LBT成功的时刻位于该时隙的中间位置，而该位置之后的该时隙不足以用于发送侧行信息，则第一时隙包括LBT成功时所在时隙的下一个时隙。
根据本实施例的方法，第一终端设备可在LBT成功后立即发送侧行信息，或者说，在第一终端设备执行LBT成功时所在的时隙或第一终端设备执行LBT成功时所在时隙的下一个时隙发送侧行信息，因此能够保证各类UE接入信道的公平性，同时有利于减小第一终端设备发送侧行信息的时延。
结合第一方面，在第一方面的某些实现方式中，第一终端设备在第一时间单元上发送侧行信息，包括：第一终端设备在第一时间单元和第一时间单元之后的至少一个时间单元上发送侧行信息。
根据本实施例的方法，由于发送侧行信息的时间单元可以多于1个时间单元，因此，第一终端设备可在LBT成功后发送多个侧行信息。例如，第一终端设备可在第一时间单元和第一时间单元之后的至少一个时间单元上发送初传信息和至少一个重传信息，其中，该多个侧行信息包括该初传信息和该至少一个重传信息。
结合第一方面，在第一方面的某些实现方式中，方法还包括：第一终端设备在第二时间单元上发送第一控制信息，第一控制信息用于指示侧行信息的第一预留资源，其中，第一预留资源是第一终端设备根据感知结果确定的资源。
在本实施例中，第一终端设备可在第二时间单元上发送第一控制信息。其中，第一终端设备发送第一控制信息的时间单元，位于第一终端设备根据感知结果选择出了可用于发送侧行信息的资源时所在的时间单元之后，因此，第一控制信息可用于指示基于感知结果的预留资源，或者说，第一预留资源是根据感知结果的确定的资源。
其中，第一预留资源是根据感知结果确定的资源，或者还可理解为，第一预留资源中不包括其他终端设备(例如第二终端设备)的预留资源；或者还可以理解为，第一预留资源属于第一终端设备排除其他终端设备的预留资源后剩余的资源。第一控制信息用于指示基于感知结果的预留资源，还可理解为，第一终端设备在通过第一控制信息指示预留资源时，考虑了其他终端设备的预留资源，从而避免了第一预留资源与其他终端设备的预留资源发生资源碰撞。
在一个可选的实施例中，第一时间单元位于第一时刻之前，则第一终端设备在第二时间单元上发送上述第一控制信息，其中，第一时刻为第一终端设备根据感知结果选择出可用于发送侧行信息的资源的时刻；或者说，第一时刻为第一终端设备处理完感知结果的时刻。
也就是说，第一终端设备发送侧行信息时，还未根据感知结果选择出可用于发送侧行信息的资源。此时，第一终端设备可以先接入信道并发送侧行信息，直到根据感知结果选择出可用于传输侧行信息的资源，再通过发送第一控制信息指示基于感知结果的预留资源。
可选地，第一终端设备根据感知结果选择可用于发送侧行信息的资源的时间，或者说， 第一终端设备处理感知结果的时间，可以是预定义的，或者还可以是由网络设备指示的，本申请不予限定。
根据本实施例的方法，由于LBT成功时，第一终端设备可能还未根据感知结果选择出可用于传输侧行信息的资源，因此，第一终端设备可以先发送侧行信息，直到根据感知结果选择出可用于传输侧行信息的资源，再通过发送第一控制信息向其他终端设备指示自身的预留资源。由于第一终端设备在通过第一控制信息指示第一预留资源时，考虑了感知结果，或者说，考虑了其他终端设备的预留资源，因此能够避免第一终端设备的预留资源(第一预留资源)与其他终端设备的预留资源发生资源碰撞。
结合第一方面，在第一方面的某些实现方式中，第一时间单元位于第一时刻之前，且第一时间单元与第一时刻的时间间隔大于第三时间间隔，其中，第一时刻为第一终端设备根据感知结果选择出可用于发送侧行信息的资源的时刻；或者说，第一时刻为第一终端设备处理完感知结果的时刻。
其中，第三时间间隔可以是预定义/预配置的，或者还可以是由网络设备指示的，本申请不予限定。
根据本实施例的方法，第一终端设备发送侧行信息时，还未根据感知结果选择出可用于传输侧行信息的资源，并且，距离选择出可用于传输侧行信息的资源的时间大于第三时间间隔。当第一时间单元与第一时刻之间的时间间隔较大时，可认为在第一时刻之前，信道状态可能会发生较大变化，因此，第一终端设备在执行LBT成功后立即发送侧行信息，能够避免由于信道状态变化造成的LBT失败，进而导致第一终端设备无法接入信道。
结合第一方面，在第一方面的某些实现方式中，第一时间单元位于第一时刻之前，且第一时间单元与第一时刻的时间间隔小于第三时间间隔，其中，第一时刻为第一终端设备根据感知结果选择出可用于发送侧行信息的资源的时刻；或者说，第一时刻为第一终端设备处理完感知结果的时刻。
其中，第三时间间隔可以是预定义/预配置的，或者还可以是由网络设备指示的，本申请不予限定。
结合第一方面，在第一方面的某些实现方式中，第一时间单元位于第二时刻之后，其中，第二时刻为第一终端设备完成组包的时刻。
结合第一方面，在第一方面的某些实现方式中，第一预留资源所在的信道占用时间COT位于第一时间单元所在的COT之后。
根据本实施例的方法，由于第一终端设备在发送第一控制信息时，已经根据感知结果选择出了可用于传输侧行信息的资源，因此，第一控制信息可用于指示第一时间单元所在COT之后的COT中的资源，或者说，第一预留资源可以是第一时间单元所在COT之后的COT中的资源。从而，第一终端设备可以通过发送第一控制信息，为侧行信息预留下一个COT内的资源。
可选地，第一预留资源包括第一终端设备为待传输TB预留的资源；或者说，第一预留资源包括第一终端设备为传输下一个TB预留的资源；或者说，第一预留资源包括第一终端设备的周期预留资源。
结合第一方面，在第一方面的某些实现方式中，第一控制信息包括第一时间间隔，其中，第一时间间隔为第二时间单元与第一预留资源所在的时间单元之间的时间间隔；或者， 第一控制信息包括第二时间间隔和周期，其中，第二时间间隔为第一时间间隔与周期的差值，周期为第一终端设备发送侧行信息的周期。
在一种可能的实现方式中，第一控制信息包括第一时间间隔，其中，第一时间间隔为第二时间单元与第一预留资源所在的时间单元之间的时间间隔。此时，第一控制信息可用于指示第二时间单元后的第一时间间隔之后的时间单元上的第一预留资源。例如，第二时间单元为时间单元t，第一时间间隔为T1，则第一控制信息可用于指示时间单元t+T1上的第一预留资源。
在另一种可能的实现方式中，第一控制信息包括第二时间间隔和周期，其中，第二时间间隔为第一时间间隔与周期的差值。此时，第一时间间隔可通过第二时间间隔与周期的和进行表示。例如，第二时间单元为时间单元t，第二时间间隔为T2，周期为Prsvp，其中，T2＝T1-Prsvp，则第一控制信息可用于指示时间单元t+T2+Prsvp上的第一预留资源。
结合第一方面，在第一方面的某些实现方式中，第二时间单元位于第一COT内，其中，第一COT为第一时间单元所在的COT，第一时间单元位于第二时间单元之前；或者，第二时间单元位于第二COT内，其中，第一COT位于第二COT之前。
根据本实施例的方法，第一控制信息可以在第一COT内发送，也可以在第二COT内发送，其中，第一COT为第一时间单元所在的COT，或者说，侧行信息是在第一COT内发送的。第一COT还可以称为当前COT。
作为一个示例，第一控制信息可以在第一COT内发送，此时，第一时间单元位于第二时间单元之前。
作为另一个示例，第一控制信息可以在第二COT内发送，此时，第一COT在时域上位于第二COT之前。
结合第一方面，在第一方面的某些实现方式中，侧行信息包括第二控制信息，第二控制信息用于指示第一终端设备的第二预留资源，第二预留资源与第一时间单元位于同一COT内。
其中，侧行信息包括第二控制信息，还可以理解为，承载侧行信息的资源同时也是承载第二控制信息的资源。
根据本实施例的方法，由于第一终端设备在发送侧行信息时，或者说在发送第二控制信息时，可能还未根据感知结果选择出可用于发送侧行信息的资源，因此第一终端设备可通过第二控制信息指示当前COT内的预留资源，而不通过第二控制信息指示下一个COT内的预留资源，从而有利于避免预留到其他终端设备的预留资源，即避免不恰当的资源预留。
结合第一方面，在第一方面的某些实现方式中，第一控制信息指示的标识信息与第二控制信息指示的标识信息相同；或者，第一控制信息指示的标识信息为第二控制信息指示的标识信息的部分比特位；或者，第一控制信息指示的标识信息的部分比特位为第二控制信息指示的标识信息。
根据本实施例的方法，通过上述方式中的至少一种，可实现通过第一控制信息指示侧行信息的第一预留资源。其中，通过第一控制信息指示侧行信息的第一预留资源，还可以理解为，通过第一控制信息指示第二控制信息所在资源中的数据的第一预留资源。
结合第一方面，在第一方面的某些实现方式中，第一时间单元是第一终端设备根据 感知结果确定的资源。
其中，第一时间单元是第一终端设备根据感知结果确定的资源，或者还可理解为，第一时间单元内不包括其他UE的预留资源；或者还可以理解为，第一时间单元属于第一终端设备排除其他终端设备的预留资源后剩余的资源。
在本实施例中，若第一终端设备执行LBT成功，且第一终端设备已经根据感知结果选择出了可用于传输侧行信息的资源，则第一终端设备可接入信道，并在第一时间单元上发送侧行信息，其中，可用于传输侧行信息的资源包括该第一时间单元。若第一终端设备执行LBT成功，但第一终端设备还未根据感知结果选择出可用于传输侧行信息的资源，则第一终端设备不接入信道。
根据本实施例的方法，第一终端设备在选择发送侧行信息的资源时，不仅考虑LBT是否成功，还考虑发送侧行信息的时间单元(即第一时间单元)是否为第一终端设备根据感知结果选择出的可用于传输侧行信息的资源，从而，可以避免终端设备之间的资源碰撞，进而保证侧行传输的可靠性。此外，第一终端设备在LBT成功后发送侧行信息，能够保证各类终端设备接入信道的公平性。
结合第一方面，在第一方面的某些实现方式中，第一终端设备执行上述LBT成功之前，方法还包括：第一终端设备至少一次执行LBT成功。
根据本实施例的方法，第一终端设备在接入信道并发送侧行信息之前，第一终端设备可多次执行LBT成功，其中，第一终端设备可在最后一次执行LBT成功时接入信道并发送侧行信息。例如，第一终端设备在最后一次执行LBT成功时，或在最后一次执行LBT成功前，第一终端设备根据感知结果选择出了可用于传输侧行信息的资源，并且，可用于传输侧行信息的资源中，包括第一终端设备最后一次执行LBT成功时的第一时间单元，此时，第一终端设备可接入信道并发送侧行信息。
第二方面，提供了一种资源选择的方法，该方法可以由终端设备执行，或者，也可以由配置于终端设备中的芯片或芯片系统或电路执行，本申请对此不做限制。为了便于描述，下面以由第二终端设备执行为例进行说明。
该方法可以包括：第二终端设备接收来自第一终端设备的第一控制信息，第一控制信息用于指示第一终端设备的第一预留资源，第一预留资源与第一终端设备在第一时间单元发送的第一侧行信息相关，其中，第一时间单元包括第一终端设备执行LBT成功时所在的时间单元或第一终端设备执行LBT成功时所在时间单元的下一个时间单元；第二终端设备根据第一控制信息，在除第一预留资源之外的资源中确定用于发送第二侧行信息的资源。
在本实施例中，第二终端设备接收来自第一终端设备的第一控制信息，还可以理解为，第二终端设备检测来自第一终端设备的第一控制信息。
其中，第一预留资源与第一终端设备在第一时间单元发送的第一侧行信息相关，可以理解为，第一预留资源是为第一时间单元上的第一侧行信息所预留的，或者说，第一预留资源是第一时间单元上的第一侧行信息的预留资源。
根据本实施例的方法，第二终端设备可根据来自第一终端设备的第一控制信息，在除第一预留资源之外的资源中确定用于发送第二侧行信息的资源，或者说，第二终端设备可根据第一控制信息在除第一预留资源之外的资源上发送第二侧行信息，因此能够避免在第 一预留资源上发送第二侧行信息，从而提高了第一终端设备发送第一侧行信息的可靠性。
在一个可选的实施例中，第一控制信息所在的时间单元位于第一时间单元之后。也就是说，第一终端设备可以先在第一时间单元上发送第一侧行信息，之后再通过第一控制信息指示第一预留资源。例如，第一终端设备可以在根据感知结果选择出可用于传输第一侧行信息的资源之后再发送第一控制信息，因此第一控制信息可用于指示基于感知结果的预留资源，从而，能够避免不恰当的资源预留。
结合第二方面，在第二方面的某些实现方式中，方法还包括：第二终端设备从候选资源集中排除第一预留资源。
其中，该候选资源集指的是第二终端设备的候选资源集。
在本实施例中，第二终端设备可根据第一控制信息从第二终端设备的候选资源集中排除第一预留资源，从而能够避免在第一预留资源上发送第二侧行信息所导致的资源碰撞。
其中，从候选资源集中排除第一预留资源，或者还可以理解为是实现在除第一预留资源之外的资源中确定用于发送第二侧行信息的资源的一种方式，或者说，在除第一预留资源之外的资源中确定用于发送第二侧行信息的资源，包括：从候选资源集中排除第一预留资源。
结合第二方面，在第二方面的某些实现方式中，第一预留资源是第一终端设备根据感知结果确定的资源。
其中，第一预留资源是根据感知结果确定的资源，或者还可理解为，第一预留资源中不包括其他终端设备(例如第二终端设备)的预留资源；或者还可以理解为，第一预留资源属于第一终端设备排除其他终端设备的预留资源后剩余的资源。第一控制信息用于指示基于感知结果的预留资源，还可理解为，第一终端设备在通过第一控制信息指示预留资源时，考虑了其他终端设备的预留资源，从而避免了第一预留资源与其他终端设备的预留资源发生资源碰撞。
结合第二方面，在第二方面的某些实现方式中，第一预留资源所在的信道占用时间COT位于第一时间单元所在的COT之后。
根据本实施例的方法，由于第一终端设备在发送第一控制信息时，已经根据感知结果选择出了可用于传输侧行信息的资源，因此，第一控制信息可用于指示第一时间单元所在COT之后的COT中的资源，或者说，第一预留资源可以是第一时间单元所在COT之后的COT中的资源。从而，第一终端设备可以通过发送第一控制信息，为侧行信息预留下一个COT内的资源。
结合第二方面，在第二方面的某些实现方式中，第一预留资源包括第一控制信息所在时间单元后的第一时间间隔之后的预留资源。
根据本实施例的方法，第一预留资源包括第一控制信息所在时间单元后的第一时间间隔之后的预留资源，也就是说，第一控制信息可用于指示第一控制信息所在时间单元后的第一时间间隔之后的时间单元上的第一预留资源。例如，第一控制信息所在时间单元为时间单元t，第一时间间隔为T1，则第一控制信息可用于指示时间单元t+T1上的第一预留资源。
结合第二方面，在第二方面的某些实现方式中，第一控制信息包括：第一时间间隔；或者，第二时间间隔和周期，其中，第二时间间隔为第一时间间隔与周期的差值，周期为 第一终端设备发送第一侧行信息的周期。
在一种可能的实现方式中，第一控制信息包括第一时间间隔。此时，第二终端设备可根据第一控制信息，排除第一控制信息所在时间单元后的第一时间间隔之后的第一预留资源。例如，第一控制信息所在的时间单元为时间单元t，第一时间间隔为T1，则第二终端设备可根据第一控制信息，排除时间单元t+T1处的第一预留资源。
在另一种可能的实现方式中，第一控制信息包括第二时间间隔和周期，其中，第二时间间隔是第一时间间隔与周期的差值。此时，第一时间间隔可通过第二时间间隔与周期的和进行表示。例如，第一控制信息所在的时间单元为时间单元t，第二时间间隔为T2，周期为Prsvp，其中，T2＝T1-Prsvp，则第二终端设备可根据第一控制信息，排除时间单元t+T2+Prsvp处的第一预留资源。
第三方面，提供了一种资源选择的方法，该方法可以由终端设备执行，或者，也可以由配置于终端设备中的芯片或芯片系统或电路执行，本申请对此不做限制。为了便于描述，下面以由第二终端设备执行为例进行说明。
该方法可以包括：第二终端设备接收来自第一终端设备的控制信息，控制信息用于指示第一终端设备的预留资源；第二终端设备根据控制信息，在除预留资源和第一资源之外的资源中确定用于发送侧行信息的资源，其中，第一资源与预留资源在时域上相邻。
在本实施例中，第二终端设备不但需要满足在除第一终端设备的预留资源之外的资源中确定用于发送侧行信息的资源，还需要满足在除第一资源之外的资源中确定用于发送侧行信息的资源。
根据本实施例的方法，由于第二终端设备在第一终端设备的预留资源，以及在与该预留资源在时域上相邻的资源内都不发送侧行信息，因此有利于提高第一终端设备发送侧行信息的成功率和可靠性。
结合第三方面，在第三方面的某些实现方式中，第一资源与预留资源在时域上相邻，包括：第一资源所在时间单元是预留资源所在时间单元前的预设时段；或者，第一资源所在时间单元是预留资源所在时间单元后的预设时段；或者，第一资源所在时间单元包括预留资源所在时间单元前的预设时段和预留资源所在时间单元后的预设时段。
根据本实施例的方法，第二终端设备不仅可以排除第一终端设备的预留资源，还可以排除第一资源。当第一资源所在时间单元为第一终端设备的预留资源所在时间单元前的预设时段时，有利于避免第一终端设备在预留资源所在时间单元前执行LBT失败，从而提高了第一终端设备发送侧行信息的可靠性。当第一资源为第一终端设备的预留资源所在时间单元后的预设时段时，若第一终端设备在预留资源所在时间单元前或在预留资源所在时间单元执行LBT未成功，则第一终端设备还可以在预留资源所在时间单元后的预设时段内根据LBT结果发送侧行信息，从而提高了第一终端设备发送侧行信息的成功率和可靠性。
结合第三方面，在第三方面的某些实现方式中，方法还包括：第二终端设备从候选资源集中排除预留资源和第一资源。
根据本实施例的方法，第二终端设备为实现上述在除预留资源和第一资源之外的资源中确定用于发送侧行信息的资源，一种可选的方式为，从候选资源集中排除预留资源和第一资源。由于第二终端设备从候选资源集中排除预留资源和第一资源后，无法在该预留资 源和第一资源上发送侧行信息，因此有利于提高第一终端设备发送侧行信息的成功率和可靠性。
结合第三方面，在第三方面的某些实现方式中，方法还包括：第二终端设备在预留资源所在时间单元和第一资源所在时间单元，不执行LBT；或者，第二终端设备在预留资源所在时间单元和第一资源所在时间单元，不测量信道是否被占用。
对于第二终端设备还未接入信道的场景，第二终端设备为实现上述在除预留资源和第一资源之外的资源中确定用于发送侧行信息的资源，一种可选的方式为，第二终端设备在预留资源所在时间单元和第一资源所在时间单元，不执行LBT，或者，不测量信道是否被占用。从而，能够避免第二终端设备在预留资源以及第一资源所在的时间单元内接入信道并发送侧行信息，进而避免了第一终端设备执行LBT失败，因此提高了第一终端设备发送侧行信息的可靠性。
第四方面，提供一种资源选择的装置，该装置用于执行上述第一方面或第三方面任一种可能实现方式中的方法。具体地，该装置可以包括用于执行第一方面至第三方面任一种可能实现方式中的方法的单元和/或模块，如处理单元和/或通信单元。
在一种实现方式中，该装置为第一终端设备或第二终端设备。当该装置为第一终端设备或第二终端设备时，通信单元可以是收发器，或，输入/输出接口；处理单元可以是至少一个处理器。可选地，收发器可以为收发电路。可选地，输入/输出接口可以为输入/输出电路。
在另一种实现方式中，该装置为用于第一终端设备或第二终端设备的芯片、芯片系统或电路。当该装置为用于第一终端设备或第二终端设备的芯片、芯片系统或电路时，通信单元可以是该芯片、芯片系统或电路上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等；处理单元可以是至少一个处理器、处理电路或逻辑电路等。
第五方面，提供一种通信的装置，该装置包括：至少一个处理器，用于执行存储器存储的计算机程序或指令，以执行上述第一方面至第三方面任一种可能实现方式中的方法。可选地，该装置还包括存储器，用于存储的计算机程序或指令。可选地，该装置还包括通信接口，处理器通过通信接口读取存储器存储的计算机程序或指令。
在一种实现方式中，该装置为第一终端设备或第二终端设备。
在另一种实现方式中，该装置为用于第一终端设备或第二终端设备的芯片、芯片系统或电路。
第六方面，本申请提供一种处理器，用于执行上述各方面提供的方法。
对于处理器所涉及的发送和获取/接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则可以理解为处理器输出和接收、输入等操作，也可以理解为由射频电路和天线所进行的发送和接收操作，本申请对此不做限定。
第七方面，提供一种计算机可读存储介质，该计算机可读介质存储用于设备执行的程序代码，该程序代码包括用于执行上述第一方面至第三方面任一种可能实现方式中的方法。
第八方面，提供一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述第一方面至第三方面任一种可能实现方式中的方法。
第九方面，提供一种芯片，芯片包括处理器与通信接口，处理器通过通信接口读取存储器上存储的指令，执行上述第一方面至第三方面任意一种实现方式提供的方法。
可选地，作为一种实现方式，芯片还包括存储器，存储器中存储有计算机程序或指令，处理器用于执行存储器上存储的计算机程序或指令，当计算机程序或指令被执行时，处理器用于执行上述第一方面至第三方面任意一种实现方式提供的方法。
第十方面，提供一种芯片，芯片包括逻辑电路和通信接口，通信接口用于接收待处理的数据和/或信息，并将待处理的数据和/或信息传输至逻辑电路，逻辑电路用于执行上述第一方面至第三方面任意一种实现方式提供的编码的处理，以及，所述通信接口还用于输出编码后的极化码字。
第十一方面，提供一种通信系统，包括上述的第一终端设备和第二终端设备。
附图说明
图1是适用于本申请的通信系统的一例示意图。
图2是适用于本申请的通信系统的另一例示意图。
图3是NR中PSCCH、PSSCH、PSFCH的传输结构的示意图。
图4是NR中PSCCH、PSSCH的传输结构的示意图。
图5是UE根据感知结果排除资源选择窗内的资源的方法的一例示意图。
图6是本申请实施例提供的资源选择方法的一例示意图。
图7是UE#1在第一时隙上发送SL信息的一种情况的示意图。
图8是UE#1在第一时隙上发送SL信息的另一种情况的示意图。
图9是UE#1在LBT又成功时的第一时隙上发送SL信息的一例示意图。
图10是本申请实施例提供的资源选择方法的另一例示意图。
图11是UE#1在第一COT内发送第一控制信息的一例示意图。
图12是UE#1在第二COT内发送第一控制信息的一例示意图。
图13是业务1和业务2在同一COT内进行传输的一例示意图。
图14是业务1和业务2在同一COT内进行传输的另一例示意图。
图15是本申请实施例提供的资源选择方法的另一例示意图。
图16是UE#2排除UE#1的第一预留资源的一例示意图。
图17是本申请实施例提供的资源选择方法的另一例示意图。
图18是UE#2排除UE#1的预留资源和第一资源的一例示意图。
图19是UE#2排除UE#1的预留资源和第一资源的另一例示意图。
图20是UE#2排除UE#1的预留资源和第一资源的另一例示意图。
图21是本申请实施例提供的一种资源选择的装置的示意性框图。
图22是本申请实施例提供的一种通信的装置的示意性框图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
本申请的技术方案可以应用于各种终端装置与终端装置通信的场景。例如，侧行非授权频谱(sidelink on unlicensed spectrum，SL-U)场景、设备到设备(device to device，D2D)场景、车到一切(vehicle to everything，V2X)场景、机器通信(machine type communication，MTC)/机器到机器通信(machine to machine，M2M)场景等。
终端装置，例如可以是终端设备，或者是用于实现终端设备的功能的模块，例如芯片或芯片系统，该芯片或芯片系统可以设置在终端设备中。
终端设备，又可以称之为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等，是一种向用户提供语音和/或数据连通性的设备。例如，终端设备可以包括具有无线连接功能的手持式设备、车载设备等。目前，终端设备可以是：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、XR设备、MR设备、工业控制(industrial control)中的无线终端、无人驾驶(self-driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端，或智慧家庭(smart home)中的无线终端等。
本申请实施例中的终端设备还可以指接入终端、移动设备、用户终端、终端、无线通信设备。
本申请的终端设备可以为包含无线收发功能，且可以为用户提供通讯服务的设备。具体地，终端设备可以为SL-U系统中的设备，V2X系统中的设备、D2D系统中的设备、MTC系统中的设备等。例如，终端可以指工业机器人、工业自动化设备、用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、无线终端、移动终端、用户端设备(customer premise equipment，CPE)、车载终端、用户代理、用户装置、虚拟现实中的终端、增强现实中的终端、远程医疗中的终端、智能电网中的终端、智能家具中的终端、智能办公中的终端、智能穿戴中的终端、智能交通中的终端、或智慧城市中的终端等。又例如，终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，第五代(5th generation，5G)网络或5G之后的网络中的终端或未来演进的通信网络中的终端等。
本申请的终端设备还可以为在非授权频谱上进行通信的各类终端设备，例如，如无线保真(wireless fidelity，Wi-Fi)场景中的设备(下文中简称为Wi-Fi UE)、蓝牙场景中的设备(下文中简称为蓝牙UE)、紫蜂(zigbee)场景中的设备(下文中简称为zigbee UE)等。
本申请的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
本申请中涉及的网络装置，也可以称为网络设备，为终端装置提供接入的设备。网络设备可以包括无线接入网(radio access network，RAN)设备，例如基站。网络设备也可以是指在空口与终端设备通信的设备。网络设备可以包括LTE系统或高级长期演进(long term evolution-advanced，LTE-A)中的演进型基站(evolved Node B)，可简称为eNB或e-NodeB)。eNB是一种部署在无线接入网中满足第四代移动通信技术(the fourth generation，4G)标准的为终端设备提供无线通信功能的装置。网络设备还可以是新无线控制器(new radio controller，NR controller)，可以是5G系统中的(gNode B，gNB)，可以是集中式 网元(centralized unit)，可以是新无线基站，可以是射频拉远模块，可以是微基站(也称为小站)，可以是中继(relay)，可以是分布式网元(distributed unit)，可以是各种形式的宏基站，可以是传输接收点(transmission reception point，TRP)、传输测量功能(transmission measurement function，TMF)或传输点(transmission point，TP)或者任何其它无线接入设备，本申请实施例不限于此。网络设备也可以包括无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)或射频拉远单元(remote radio unit，RRU)，或无线保真(wireless fidelity，Wifi)接入点(access point，AP)，或者在云无线接入网(cloud radio access netowrk，CRAN)中的基带池(BBU pool)和RRU等。本申请的实施例对网络设备所使用的具体技术和具体设备形态不做限定。例如，网络设备在4G系统中可以对应eNB，在5G系统中对应gNB。
本申请中，网络装置也可以是中央处理单元(central processing element，CPE)、路由器等。
本申请中，网络装置也可以是一个功能模块、芯片或芯片系统。可选地，功能模块、芯片或芯片系统可以设置于网络装置内。
在本申请实施例的描述中，以网络设备为例进行说明。本申请对网络设备所采用的具体技术和具体设备形态不做限定。
下面主要以SL-U通信场景为例对本申请的技术方案进行描述。
图1和图2为适用于本申请的通信系统的示意图。
如图1所示，通信的终端设备例如可以是手机。其中，终端设备与网络设备之间通信的链路包括上行链路和下行链路，终端设备与终端设备之间通信的链路为侧行链路。
本申请对网络设备所采用的具体技术和具体设备形态不做限定。
如图2所示，通信的一方终端设备例如可以是虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、或混合现实设备(mixed reality，MR)，通信的另一方终端设备例如可以是处理设备或显示设备。
应理解，本申请实施例中对于终端设备的具体形式不做特殊限制，在此仅是示例性说明。
还应理解，本申请对于终端设备的类型不做限制。示例性地，终端设备可以是SL UE、Wi-Fi UE、蓝牙UE或zigbee UE。为便于描述，下文中主要以终端设备为SL UE进行示例性说明。
还应理解，图1和图2仅为便于理解而示例的简化示意图，不对本申请的保护范围构成任何限定。例如，该通信系统中还可以包括其他终端设备，图1和图2中未予以画出。
需要说明的是，本申请描述的场景是为了更加清楚地说明本申请的技术方案，并不构成对于本申请的技术方案的限定，本领域普通技术人员可知，随着新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
为了便于理解，下面对本申请涉及的名词、术语或技术进行说明。
1.资源
资源是指在资源池中的时频资源。
其中，时域资源包括符号(symbol)、时隙(slot)、迷你时隙(mini-slot)、部分时隙(partial slot)、子帧(sub-frame)、无线帧(frame)、感知时隙(sensing slot)等。频域资源包括资源单元(resource element，RE)、资源块(resource block，RB)、子信道(subchannel)、资源池(resource pool)、带宽(bandwidth)、带宽部分(bandwidth part，BWP)、载波(carrier)、信道(channel)、交错(interlace)等。
为了便于描述，本文以时域资源为时隙为例描述传输PSCCH和/或PSSCH的资源。
2.物理侧行控制信道(physical sidelink control channel，PSCCH)、物理侧行共享信道(physical sidelink shared channel，PSSCH)、物理侧行反馈信道(Physical Sidelink Feedback Channel，PSFCH)的传输结构
按照Rel-16/Rel-17NR协议，PSCCH和/或PSSCH的调度粒度在时域上的单位为一个时隙，在频域上的单位为连续的一个或多个子信道。发送UE可以在该资源上发送侧行信息。在一个资源上可以承载PSCCH、PSSCH、PSFCH三种信道和解调参考信号(demodulation reference signal，DMRS)、信道状态信息参考信号(channel state information reference signal，CSI-RS)等信号。其中，PSCCH中承载一阶侧行控制信息(sidelink control information，SCI)，PSSCH中承载二阶SCI和/或数据，PSFCH承载反馈信息。
1)PSCCH的传输结构：
PSCCH承载一阶SCI。时域上，PSCCH占用从第二个侧行符号开始的两个或三个正交频分复用(orthogonal frequency division multiplexing，OFDM)符号；频域上，承载PSCCH的物理资源块(physical resource blocks，PRB)从关联的PSSCH的最低子信道的最低PRB开始，且PSCCH占据的PRB个数在一个PSSCH的子带范围内。PSCCH由{10,12,15,20,25}个资源块(resource block，RB)组成，具体取值由预配置或者网络配置。
2)PSSCH的传输结构：
PSSCH承载二阶SCI和数据。时域上，在没有PSFCH的资源上，有12个符号用于承载PSSCH；在有PSFCH的资源上，有9个符号用于承载PSSCH。频域上，占据连续LsubCh个子信道。另外，在一个时隙内，第一个OFDM符号复制第二个符号上发送的信息，用于自动增益控制(Automatic Gain Control，AGC)。
3)PSFCH的传输结构：
PSFCH承载反馈信息。在有PSFCH的资源上，倒数第二个和第三个OFDM符号用于承载PSFCH。倒数第三个符号上的信号是倒数第二个符号上信号的重复，以便接收UE进行AGC调整。
此外，UE可能在连续的两个时隙上分别接收和发送PSSCH，UE还可能在同一个时隙上分别接收和发送PSSCH和PSFCH。因此，在PSSCH后和PSFCH符号之后，可能需要额外增加一个符号(GAP符号)，用于UE的收发转换。
图3示出了NR中，PSCCH、PSSCH、PSFCH的传输结构的示意图。该PSCCH、PSSCH、PSFCH可承载于1个时隙、3个子信道上，其中，1个时隙包括14个符号。
图4示出了NR中PSCCH、PSSCH的传输结构的示意图。该传输结构的时隙上无PSFCH时机，该PSCCH、PSSCH可承载于1个时隙、3个子信道上，其中，1个时隙包括14个符号。
3.控制信息、数据信息和反馈信息
1)控制信息包括SCI、媒体接入控制-控制元素(medium access control control element，MAC CE)、无线资源控制(radio resource contro，RRC)、邻近服务通信-5(proximity-based services communication，PC-5)RRC等。在NR系统中，SCI可以指一阶SCI和/或二阶SCI，其中，一阶SCI还可以记作SCI-1，二阶SCI还可以记作SCI-2。一阶SCI承载于PSCCH，二阶SCI和/或MAC CE承载于PSSCH，RRC、PC-5RRC承载于PSSCH。为便于描述，在不引起歧义的情况下，本申请中所提及的SCI，均指的是一阶SCI和/或二阶SCI。
2)数据信息承载于PSSCH。数据还可以称为SL数据或者MAC业务数据单元(MAC service data unit，MAC SDU)。在本申请中，在不引起歧义的情况下，数据与PSSCH可表示相同的含义。
3)反馈信息承载于PSFCH。
4.资源池
NR SL通信基于资源池(resource pool)进行。其中，资源池指的是一块专用于SL通信的时频资源。资源池包含的频域资源是连续的。资源池包含的时域资源可以是连续的，也可以是不连续的。不同的资源池由SL资源池标识(例如SL-ResourcePoolID)区分。UE在收资源池上接收，在发资源池上发送。如果资源池具有相同的资源池索引，则可以认为资源池的时频资源是完全重合的。
在SL-U通信场景中，由于频带是由多种形式的UE共享的，如SL场景中的UE(下文简称为SL UE)、Wi-Fi UE、蓝牙UE在相同的频带上传输。因此，SL资源池还可以理解为：可用于SL传输的资源集合。在本申请中，资源池还可以称为信道(channel)、工作信道(operating channel)、名义信道(nominal channel bandwidth)、带宽(bandwith)。也就是说，在本申请中，资源池、信道、带宽均可表示可用于SL传输的资源集合。
资源池与信道的关系：资源池中包括至少一个信道。例如，资源池包括一个信道，信道带宽为20MHz，资源池带宽为20MHz。再例如，资源池包括2个信道，信道带宽为20MHz，资源池带宽为40MHz。再例如，资源池包括5个信道，信道带宽为20MHz，资源池带宽为100MHz。
5.优先级
UE的业务优先级是指UE的发送优先级(transmission priority)。由于UE可能同时发送了多个业务，因此该多个业务的优先级可能不同。
其中，业务优先级，还可以称为L1优先级(L1 priority)、物理层优先级、SCI中携带的优先级、SCI关联的PSSCH对应的优先级、发送优先级、发送PSSCH的优先级、用于资源选择的优先级、逻辑信道的优先级、逻辑信道的最高等级的优先级。
其中，优先级等级与优先级值具有对应关系。例如，在某些场景中，优先级等级越高对应的优先级值越低，或者可以理解为，更低的优先级值代表更高等级的优先级。又例如，在某些场景中，优先级等级越低对应的优先级值越低，或者可以理解为，更低的优先级值代表更低等级的优先级。
举例来说，优先级值取值范围例如为0至7的整数，当更低的优先级值代表更高等级的优先级时，优先级值为0时代表最高等级的优先级，当更低的优先级值代表更低等级的优先级时，优先级值为7时代表最高等级的优先级。
为便于描述，在不引起歧义的情况下，本申请中均以优先级等级越高对应的优先级值越低为例进行说明。
6.源标识、目的地标识
层2源标识(source layer-2 ID或source L2 ID)为24bit。其中层2源标识的低8位(LSB part(8bits))称为层1源标识，即为NR的SCI中指示的源ID(source ID)；高16位(MSB part(16bits))称为SRC，在MAC CE的MAC头中指示。控制信息中的源标识可以指NR的SCI中指示的源ID、MAC头中的SRC、层2源标识。层2目的地标识(destination layer-2 ID或destination L2 ID)为24bit。其中层2目的地标识的低16位(LSB part(16bits))称为层1目的地标识，即为NR的SCI中指示的目的地ID(destination ID)；高8位(MSB part(8bits))称为DST，在MAC CE的MAC头中指示。控制信息中的目的地标识可以指SCI中指示的目的地ID、MAC头中的DST、层2目的地标识。
长期演进(long term evolution，LTE)的SCI中无源标识，只有24bit的层2源标识，在MAC头中SRC字段指示。LTE的SCI中无目的地标识，只有24bit的层2目的地标识，在MAC头中DST字段指示层2目的地标识或者层2目的地标识的高16位。
另外，在协议中目的地(destination)还可以泛指。例如，对于单播来说，destination代表层2源标识和层2目的地标识对；对于广播和组播来说，destination代表层2目的地标识。
7.非授权频谱(unlicensed spectrum)
根据《中华人民共和国无线电频率划分规定》，为了充分、合理、有效地利用无线电频谱资源，保证无线电业务的正常运行，防止各种无线电业务、无线电台站和系统之间的相互干扰对频段进行了划分。2/3/4/5G等技术使用是授权频谱，需要由电信运营商申请才能使用，具有干扰小、安全的特点。
Wi-Fi、蓝牙、Zigbee等技术使用的是非授权频谱，目的是作为运营商增强其服务提供的补充工具，无需申请就能使用授权频谱通信，并且免费。在非授权频谱上通信需要遵守某些规定，例如先听后说(listen-before-talk，LBT)和占用信道带宽(occupied channel nandwidth，OCB)要求，用于保证在该频谱上运行的各类UE接入信道的公平性。在非授权频谱上的SL通信可称为SL-U。其中，Wi-Fi UE、蓝牙UE、Zigbee UE相对于SL UE可以统称为异系统UE。
8.LBT或信道接入
在非授权频谱上接入需要进行先听后说(listen-before-talk，LBT)，其中，进行LBT，还可以理解为进行信道接入，即确定在一段时间内信道空闲，则UE才能够在信道内传输信息。LBT包括类型1(type1)LBT和类型2(type2)LBT。其中，类型1LBT是基于回退的LBT，回退的时间与CAPC有关，需要信道空闲较长时间才能接入。其中，执行信道接入的频域单位为信道。
下面分别介绍LBT的两种类型。
类型1信道接入(type 1 channel access或type 1 SL channel access)：
类型1信道接入还可以称为类型1LBT。包括2个部分：长度为Td的信道感知(defer duration)和循环感知。
长度为Td的信道感知由一个Tf＝16us和后续连续的mp个Tsl＝9us组成，即Td＝Tf+mp ×Tsl。其中，Tf的感知时间在最开始的9us，当Td的所有感知时间都空闲后进入循环感知。mp的取值可参见表1或表2，其中CWmin,p≤CWp≤CWmax,p为竞争窗(contention window)，Tcot,p为COT的最大长度。
循环感知是基于计数器N的循环过程，包括以下步骤：
步骤1：令N＝Ninit，其中Ninit是取值范围为0到CWp的随机数。然后进入步骤4；
步骤2：如果N>0，则UE减小计数器值，令N＝N-1；
步骤3：在感知时隙(an additional sensing slot duration)内感知信道(sense the channel)，如果感知结果为空闲(idle)，进入步骤4；否则，进入步骤5；
步骤4：如果N＝0，停止；否则，进入步骤2；
步骤5：感知信道直到感知到Td中有一个感知时隙(sensing slot)为繁忙(busy)，或者直到Td中所有感知时隙均为空闲；
步骤6：如果Td中所有感知时隙均为空闲，进入步骤4；否则进入步骤5。
应理解，在本申请中，计数器N也可以称为LBT计数器N。
示例性地，表1和表2示出了信道接入的相关参数值。
表1
表2
类型2信道接入(type 2 channel access或者type 2 SL channel access)
类型2信道接入包含三种类型，类型2A、类型2B、类型2C。类型2 LBT仅需要信道空闲较短的时间(如16us或者25us)UE就可以接入信道。类型2 LBT主要在COT共享时使用，并有相应的执行条件，如初始COT的UE和共享COT的UE主要有收发关系。
下面分别介绍上述类型2A、类型2B、和类型2C。
类型2A信道接入：UE在至少感知到感知间隔Tshort＝25us内信道空闲后立即传输。具体地，Tshort＝25us由1个Tf＝16us的感知时隙和1个Tsl＝9us的感知时隙组成。如果这两个感知时隙均为空闲，则认为信道空闲。
类型2B信道接入：UE在感知到Tf＝16us内信道空闲后立即传输。具体的，信道感知发生在Tf的最后9us，信道感知时间不小于5us，如果有4us以上感知信道空闲，则认为信道空闲。
类型2C信道接入：UE不进行信道感知即可传输，传输时间最多584us。
9.信道占用(channel occupancy，CO)和信道占用时间(channel occupancy time，COT)
信道是指在非授权频谱中执行信道接入过程的一组连续资源块(RB)组成的载波或载波的一部分。可以理解为，信道为UE执行信道接入的带宽。
信道还可以称为RB集合(RB set)。
信道占用是指UE在执行信道接入过程后在一个或者多个信道上的传输。
UE执行类型1信道接入后在一段连续的时间内占用信道传输信息，称为信道占用时间。COT的频域单元为信道，时域单元为ms或时隙。在本申请中，COT可以是一个时间概念，即SL传输的时间，也可是一个资源的概念，即SL传输所占的时频资源。在本申请中，若不做进一步区分，COT和CO可为同一概念。
应理解，UE可以在相邻或者不相邻的多个信道传输信息。在本申请中，UE在多个信道传输信息可以理解成：UE传输信息占用了1个COT，COT在频域上占用了多个信道，或者，UE传输信息占用了多个COT，每个COT在频域上占用了1个信道。
COT可以共享用于UE之间的信息传输(COT sharing)。初始COT的UE可以把COT共享给其他UE，即用于其他UE的SL传输。初始COT的UE和共享COT的UE在一段连续的时间内占用信道传输COT共享需要满足相应条件，如初始COT的UE为共享COT的UE的接收UE或者发送UE，再如初始COT的UE和共享COT的UE为同一个组内的组员。
UE传输信息的时间不能超过最大信道占用时间的限制(maximum channel occupancy time，MCOT)，记为Tcot,p。对于不同的CAPC，Tcot,p的值不同，如表1、表2所示。对于1个UE接入信道并在COT内传输信息，传输时间不超过最大信道占用时间Tcot,p。对于多个UE在COT内传输信息，初始COT的UE和共享COT的UE的传输时间不超过最大信道占用时间Tcot,p。p为初始COT的UE的CAPC，或者，p为在COT传输的UE中CAPC值最小的CAPC。
10.ID
在本申请中，ID也可以称为标识、序列、编号、索引。
在R16的SL通信场景中，为UE确定用于传输SL信息的资源的方式包括方式1(mode1)和方式2(mode2)。在方式1中，UE用于传输SL信息的资源可由基站进行调度。在方式2中，基站可配置资源池，从而，UE可通过资源感知和资源选择的方式，选择可用于传输SL信息的资源。UE进行资源感知和资源选择的方法可以包括如下步骤：
步骤1：UE通过对PSCCH解码和对PSRP值进行测量，在资源感知窗内感知资源，或者说，进行资源感知。
步骤2：UE根据资源感知窗内资源的感知结果，通过比较参考信号接收功率(reference signal receiving power，RSRP)阈值、RSRP测量值，判断是否从资源选择窗内排除资源，从而形成候选资源集。
图5示出了UE根据感知结果排除资源选择窗内的资源的方法的一例示意图。
例如：在资源感知窗内，资源1的RSRP测量值高于RSRP阈值，则排除资源1中SCI指示的预留资源中落入资源选择窗内的资源。又例如，在资源感知窗内资源2上的RSRP测量值低于RSRP阈值，则不排除资源2中SCI指示的预留资源中落入资源选择窗 内的资源。其中，RSRP阈值与SCI指示的业务优先级以及UE自身的业务优先级有关。
其中，预留资源可以理解为是某个UE(例如UE#1)预先指定或占用的用于该UE(UE#1)后续发送信息的资源，从而，其他UE(例如UE#2)可根据资源感知结果，从该UE(UE#2)的资源选择窗内排除该预留资源。
步骤3：UE从候选资源集中选择可用于传输SL信息的资源，其中，UE传输的SL信息包括初传信息和若干个重传信息。
步骤4：当满足一定条件，例如该UE的预留资源与其他UE的预留资源重合、重选计数器，则UE触发资源重选。其中，重选计数器还可以理解为，UE重新评估候选资源集中的资源是否可用，若不可用，则UE触发资源重选。
在SL-U通信场景中，需要遵循LBT要求，或者说，需要执行信道接入，以保证各类UE接入信道的公平性。然而，在目前R16的SL通信场景中，仅根据资源感知结果选择可用于传输SL信息的资源，不执行LBT，或者说，不执行信道接入，因此，上述SL通信场景中选择资源的方法不适用于SL-U的通信场景。
为此，本申请针对SL-U通信场景，提供一种资源选择的方法和装置，在该方法中，终端设备在LBT成功之后发送SL信息，因此有利于保证各类UE接入信道的公平性。
其中，时间单元例如可以是符号、时隙、迷你时隙、部分时隙、子帧、无线帧、感知时隙等，本申请不予限定。
为便于理解本申请的实施例，下文中以时间单元是时隙为例进行示例性说明。
下文将结合附图详细说明本申请实施例提供的资源选择的方法。本申请实施例提供的资源选择的方法可以应用于上述图1和图2所示的通信系统中。
图6是本申请实施例提供的资源选择方法的一例示意图。该方法600可以包括S610和S620。
S610，UE#1执行LBT。
在本实施例中，UE#1(即第一终端设备的一例)可从时隙n开始执行LBT，或者说，开始执行信道接入。例如，执行类型1LBT。进而，UE#1可根据LBT结果选择用于发送SL信息的资源。
可选地，UE#1可根据CAPC开始执行LBT。其中，CAPC等有关信道接入的参数值可以参考上述表1和表2。
可选地，UE#1还可以从时隙n开始，根据感知结果选择可用于传输SL信息的资源，或者说，根据感知结果进行资源选择。其中，UE#1根据感知结果进行资源选择，还可以理解为，UE#1在选择资源的过程中考虑其他UE的预留资源，或者还可以理解为，UE#1在选择资源的过程，从该UE#1的候选资源集中排除其他UE的预留资源。
可以理解的是，若UE#1在进行资源选择时考虑了感知结果，或者说，考虑了其他UE的预留资源，那么，UE#1根据感知结果选择出的可用于传输SL信息的资源选中，可不包括其他UE的预留资源，或者说，UE#1根据感知结果选择出的可用于传输SL信息的资源不属于其他UE的预留资源。
其中，SL信息可以包括PSCCH、PSSCH、PSFCH中的至少一种。SL信息的传输结构例如可以为图3或图4所示的传输结构。其中，PSCCH可用于承载控制信息，PSSCH可用于承载控制信息和/或数据，PSFCH可用于承载反馈信息，因此，SL信息包括PSCCH、 PSSCH、PSFCH中的至少一种，还可以理解为，SL信息包括SL数据信息、SL控制信息、SL反馈信息中的至少一种。
在本实施例中，时隙n还可用于表示以下任一项所述的时刻：触发资源选择的时刻、确定传输参数的时刻、确定有数据发送的时刻、物理层到包的时刻、MAC层到包的时刻、开始执行信道接入的时刻。
其中，传输参数例如可以包括以下参数中的一项或多项：物理层优先级(L1 priority)、信道访问优先级类(channel access priority class，CAPC)、子信道数、交错数、周期。
为便于描述，UE#1从时隙n开始根据感知结果进行资源选择，到选择出可用于传输SL信息的资源所经过的时间(时长)，或者说，UE#1根据感知结果选择可用于传输SL信息的时间，可以记作Tproc。
在本实施例中，Tproc还可以理解为：根据感知结果进行资源选择的时间、根据传输参数选择可用于传输SL信息的资源的时间、选择可用于SL传输的资源的处理时间、基于感知结果选择可用于SL传输的资源的时间、对感知结果进行处理的时间、或根据传输参数对感知结果进行处理的时间。
相应地，时隙n+Tproc可以理解为：选择出可用于传输SL信息的资源的时隙、根据传输参数选择出可用于传输SL信息的资源的时隙、选择出SL资源的时隙、选择出可用于SL传输的资源的时隙、基于感知结果选择出可用于SL传输的资源的时隙、处理完感知结果的时隙、或根据传输参数处理完感知结果的时隙。
可选地，Tproc可以是预定义的，或者还可以是由网络设备指示的，本申请不予限定。
可选地，根据感知结果进行资源选择的时间Tproc可以包括以下时间中的任一项，或者至少两项之和：准备感知结果的时间、将感知结果上报至MAC层的时间、MAC层选择资源或创建授权(selected sidelink grant)的时间、MAC层将资源指示给物理层的时间、收发转换的时间、数据准备时间。其中，数据准备时间包括以下时间中的任一项，或者至少两项之和：信道编码的时间、调制时间、RE映射的时间、产生OFDM信号的时间、组包时间。
在一种可能的实现方式中，Tproc的取值与子载波间隔(subcarrier space，SCS)有关。在NR中，NR的子载波间隔可以为2μ·15KHz。
作为示例，表3和表4示出了μ的取值、SCS以及Tproc的取值之间的对应关系。其中，Tproc为Tproc可选值1、Tproc可选值2或Tproc可选值3中的任意一项。表3中Tproc的单位为时隙，表4中Tproc的单位为毫秒(ms)。
表3
表4
在另一种可能的实现方式中，Tproc的取值还可以是一个A毫秒+B个时隙数对应的时间之和。其中，A和B的值可根据UE的传输能力确定。
S620，UE#1在第一时隙上发送SL信息。其中，第一时隙包括UE#1执行LBT成功时所在的时隙或UE#1执行LBT成功时所在时隙的下一个时隙。
其中，LBT成功时所在的时隙，也可以理解为，LBT计数器N＝0的时隙。
举例来说，假设UE#1在时隙1、时隙2、时隙3和时隙4上执行LBT，且UE#1在时隙2上执行LBT成功，或者说，在时隙2上LBT计数器N＝0，则LBT成功时所在的时隙为时隙2，或者说，时隙2即为LBT成功时所在的时隙。
在S620中，UE#1可根据执行LBT的结果选择发送SL信息的资源。具体地，若LBT成功，则UE#1可在第一时隙上发送SL信息。其中，第一时隙包括LBT成功时所在的时隙或LBT成功时所在时隙的下一个时隙。
由于UE#1执行LBT的时间和根据感知结果进行资源选择的时间可能不同，因此，可能出现LBT成功时还未根据感知结果选择出可用于传输SL信息的资源。如果UE#1在LBT成功时不发送SL信息，或者说，不接入信道，则其他UE可能会接入信道，从而导致UE#1根据感知结果选择出可用于传输SL信息的资源时LBT失败。因此，在本实施例的一种可能的实现方式中，无论UE#1是否根据感知结果选择出了可用于传输SL信息的资源，UE#1均在LBT成功后立即接入信道并发送SL信息，或者说，在UE#1执行LBT成功时所在的时隙或UE#1执行LBT成功时所在时隙的下一个时隙发送SL信息，因此能够保证各类UE接入信道的公平性。
一种可能的情况，LBT成功时所在的时隙能够用于发送SL信息。例如，LBT成功的时刻位于该时隙的起始位置，则第一时隙包括LBT成功时所在的时隙。
另一种可能的情况，LBT成功时所在的时隙不能够用于发送SL信息。例如，LBT成功的时刻位于该时隙的中间位置，而该位置之后的该时隙不足以用于发送SL信息，则第一时隙包括LBT成功时所在时隙的下一个时隙。
值得说明的是，LBT的感知时隙(sensing slot)为9us的时间单元。UE#1在一个感知时隙LBT成功，则会在下一个感知时隙接入信道。
其中，UE#1在第一时隙上发送SL信息可能包括以下几种情况：
情况1：第一时隙不属于UE#1的候选资源集。在该情况下，UE#1仍在第一时隙上发送SL信息。也就是说，无论该资源是否属于UE#1的候选资源集，UE#1均在第一时隙上发送SL信息。其中，第一时隙不属于UE#1的候选资源集还可以理解为，第一时隙所在的资源不属于UE#1的候选资源集。
其中，有关候选资源集的介绍在下文中进行描述。
情况2：LBT成功时，UE#1还未根据感知结果选择出可用于传输SL信息的资源，或者说，第一时隙早于时隙n+Tproc。在该情况下，UE#1仍在第一时隙上发送SL信息。也就是说，无论第一时隙早于或晚于时隙n+Tproc，UE#1均在第一时隙上发送SL信息。
图7示出了情况2的一例示意图。
如图7所示，UE#1从时隙n开始执行LBT，同时开始根据感知结果选择可用于传输SL信息的资源。并且，UE#1在时隙m执行LBT成功，在时隙n+Tproc根据感知结果选择出了可用于传输SL信息的资源，则UE#1发送SL信息的时隙包括时隙m，或时隙m+1。或者说，UE#1发送SL信息的时隙为第一时隙。
情况3：UE#1执行LBT成功时所在的时隙早于时隙n+Tproc，且与时隙n+Tproc之间的时间间隔小于时间间隔T，则UE#1在第一时隙上发送SL信息。
在该情况下，若UE#1执行LBT成功时所在的时隙与时隙n+Tproc之间的时间间隔小于时间间隔T，可认为UE#1很快就能够在时隙n+Tproc或时隙n+Tproc之后，在基于感知结果确定的资源上发送SL信息。也就是说，在该资源所在的时隙前，虽然第一时隙不属于基于感知结果确定的资源，但即使UE#1的SL信息传输1或2个时隙，也不会严重影响到资源池中的其他UE。因此，UE#1在执行LBT成功后立即发送侧行信息。
其中，时间间隔T与UE#1的物理层优先级和/或CAPC有关。例如，物理层优先级和/或CAPC的值越小，时间间隔T越大。
对于上述情况3，一示例，当物理层优先级值和/或CAPC小于第一优先级值时，UE#1在第一时隙上发送SL信息；又一示例，当物理层优先级等级和/或CAPC等级高于第一优先级等级时，UE#1在第一时隙上发送SL信息。
其中，第一优先级值、第一优先级等级时，可以是协议预定义的，或者也可以是根据预先定义的规则生成的，或者也可以是预先配置的，或者也可以是动态配置的，不予限制。
情况4：UE#1执行LBT成功时所在的时隙早于时隙n+Tproc，且与时隙n+Tproc之间的时间间隔大于时间间隔T’，则UE#1在第一时隙上发送SL信息。
在该情况下，若UE#1执行LBT成功时所在的时隙与时隙n+Tproc之间的时间间隔大于时间间隔T’，可认为在时隙n+Tproc，信道状态可能会发生较大变化，因此，UE#1在执行LBT成功后立即发送侧行信息，能够避免由于信道状态变化造成的LBT失败，进而导致第一终端设备无法接入信道。
其中，时间间隔T’可以是预定义的，或者还可以是由网络设备指示的，本申请不予限定。
其中，时间间隔T’与UE#1的物理层优先级和/或CAPC有关。例如，物理层优先级和/或CAPC的值越小，时间间隔T’越大。
对于上述情况4，一示例，当物理层优先级值和/或CAPC小于第一优先级值时，UE#1在第一时隙上发送SL信息；又一示例，当物理层优先级等级和/或CAPC等级高于第一优先级等级时，UE#1在第一时隙上发送SL信息。
其中，第一优先级值、第一优先级等级时，可以是协议预定义的，或者也可以是根据预先定义的规则生成的，或者也可以是预先配置的，或者也可以是动态配置的，不予限制。
图8示出了情况3的一例示意图。如图8所示，UE#1从时隙n开始执行LBT，同时开始根据感知结果选择可用于传输SL信息的资源。随后，UE#1在时隙m执行LBT成 功，在时隙n+Tproc根据感知结果选择出了可用于传输SL信息的资源，并且，时隙m与时隙n+Tproc之间的时间间隔小于时间间隔T，则UE#1发送SL信息的时隙可以为时隙m，或时隙m+1。或者说，UE#1发送SL信息的时隙为第一时隙。
可选地，第一时隙位于第二时刻之后，其中，第二时刻为第一终端设备完成组包的时刻。
在一种可能的实现方式中，UE#1在第一时隙上发送SL信息，包括：UE#1在第一时隙和第一时隙之后的至少一个时隙上发送SL信息。
在该实现方式中，由于发送SL信息的时隙可以多于1个时隙，例如，发送SL信息的时隙包括M个时隙，因此，UE#1可在LBT成功后发送M个SL信息，或者说，UE#1可在LBT成功后发送M个PSCCH和/或PSSCH，可选地，还可以发送M个PSFCH。其中，后M-1个SL信息为第一个SL信息的重复(repetition)或重传(retransmission)，或者说，M个SL信息可以包括初传信息和至少一个重传信息。其中，M为大于或等于1的整数。
一示例，该M个时隙中的第一个时隙可以是LBT成功时所在的时隙，该M个时隙中的最后一个时隙可以是时隙n+Tproc。
另一示例，该M个时隙中的第一个时隙可以是LBT成功时所在的时隙，该M个时隙中的最后一个时隙可以是时隙n+Tproc+1。
另一示例，该M个时隙中的第一个时隙可以是LBT成功时所在时隙的下一个时隙，该M个时隙中的最后一个时隙可以是时隙n+Tproc。
另一示例，该M个时隙中的第一个时隙可以是LBT成功时所在时隙的下一个时隙，该M个时隙中的最后一个时隙可以是时隙n+Tproc+1。
根据本实施例的方法，无论UE#1是否根据感知结果选择出了可用于传输SL信息的资源，UE#1均在LBT成功后立即接入信道并发送SL信息，或者说，在UE#1执行LBT成功时所在的时隙或LBT成功时所在时隙的下一个时隙发送SL信息，因此能够保证各类UE接入信道的公平性。
但是，存在一种可能的情况，UE#1执行LBT成功时所在的时隙或LBT成功时所在时隙的下一个时隙可能是其他UE(例如UE#2)的预留资源，也就是说，若UE#1在该资源上发送SL信息可能会导致其他UE无法在该预留资源上发送SL信息。尤其是当其他UE的物理层优先级等级更高时，可能会出现优先级等级更高的UE无法优先使用传输资源的情况，从而降低了其他UE发送SL信息的可靠性，增加了其他UE的时延。
鉴于此，在本实施例的另一种可能的实现方式中，UE#1可根据感知结果选择出可用于传输SL信息的资源，如果在该资源所在的时隙上执行LBT成功，或者，如果在该资源所在的时隙的上一个时隙执行LBT成功，则UE#1接入信道，并在该资源上发送SL信息。从而，能够避免第一时隙与其他UE的预留资源发生资源碰撞，或者说，能够使得第一时隙不属于其他UE的预留资源。
换句话说，若UE#1执行LBT成功，且UE#1已经根据感知结果选择出了可用于传输SL信息的资源，则UE#1可接入信道，并在第一时隙上发送SL信息，其中，可用于传输SL信息的资源包括该第一时隙。若UE#1执行LBT成功，但UE#1还未根据感知结果选择出可用于传输SL信息的资源，则UE#1不接入信道。
其中，UE#1开始执行信道接入时所在的时隙，位于UE#1选择出可用于传输SL信息的资源时所在的时隙之前，或者说，位于时隙n+Tproc之前。
在一种可能的实现方式中，LBT计数器N＝N0(例如N0＝1)所在的时隙在时域上位于时隙n+Tproc之前，此时UE#1可保持LBT计数器N＝N0，直到时隙n+Tpro前N1(例如N1＝1)个感知时隙(sensing slot)，然后继续执行信道接入过程。
一种可能的情况，LBT成功时，UE#1还未根据感知结果选择出可用于传输SL信息的资源，也就是说，UE#1无法判断第一时隙是否为可用于传输SL信息的资源。在该情况下，为避免第一时隙与其他UE的预留资源发生资源碰撞，一种可选的实现方式是，即使LBT成功，UE#1也不接入信道，而是等到时隙n+Tproc之后，若LBT又成功，且UE#1根据感知结果能够判断LBT又成功时的第一时隙为可用于传输SL信息的资源，则UE#1可在LBT又成功后立即接入信道并发送SL信息。其中，LBT又成功时的第一时隙，包括LBT又成功时所在的时隙，或LBT又成功时所在时隙的下一个时隙。
应理解，UE#1在接入信道并发送SL信息之前，UE#1可多次执行LBT成功，其中，UE#1可在最后一次执行LBT成功时接入信道并发送SL信息。例如，UE#1在最后一次执行LBT成功时，或在最后一次执行LBT成功前，根据感知结果选择出了可用于传输SL信息的资源，此时，UE#1可接入信道并发送SL信息。
图9示出了UE#1在LBT又成功时的第一时隙上发送SL信息的一例示意图。
其中，LBT第一次成功时所在的时隙m1位于时隙n+Tproc之前，LBT第二次成功时所在的时隙m2位于时隙n+Tproc之后。因此，UE#1可根据感知结果判断LBT第二次成功时的第一时隙是否为可用于传输SL信息的资源，若LBT第二次成功时的第一时隙为可用于传输SL信息的资源，则UE#1可在LBT第二次成功时的第一时隙上发送SL信息，或者说，UE#1可在时隙m2或时隙m2+1上发送SL信息，或者说，UE#1可在LBT第二次成功时接入信道。
对于上述情况，另一种可选的方式是，UE#1在时隙n+Tproc之前不执行LBT，直到时隙n+Tproc开始执行LBT，从而，UE#1可先根据感知结果选择出可用于传输SL信息的资源，若LBT成功，且第一时隙为UE#1选择出的可用于传输SL信息的资源，则UE#1可接入信道并在第一时隙上发送SL信息。
可选地，对于UE#1在时隙n+Tproc之前已经开始执行LBT的情况，UE#1可暂停执行LBT，直到时隙n+Tproc之后，再继续执行LBT。例如，在时隙n+Tproc之前，LBT计数器N＝A(A为大于或等于1的整数)，则UE#1可保持N＝A，直到时隙n+Tproc之后，UE#1再令LBT计数器继续计数。
根据本实施例的方法，UE#1在选择发送SL信息的资源时，不仅考虑LBT是否成功，还考虑发送SL信息的时隙是否为UE#1根据感知结果选择出的可用于传输SL信息的资源，从而，可以避免UE之间的资源碰撞，进而保证SL传输的可靠性。此外，UE#1在LBT成功后发送SL信息，能够保证各类UE接入信道的公平性。
可选地，方法600还包括：UE#1根据感知结果排除候选资源集中的资源。该候选资源集指的是UE#1的候选资源集。
其中，UE#1根据感知结果排除候选资源集中的资源，也可以理解为，UE#1根据感知结果，排除候选资源集中其他UE的预留资源，以避免发生资源碰撞。
其中，候选资源集为资源选择窗内的资源的集合。资源选择窗的起始位置可根据以下参数中的至少一项确定：物理层优先级、CAPC、竞争窗CWp(Contention window)、LBT计数器初始值(Ninit)。
可选地，资源选择窗的起始位置可根据以下参数确定为：n+Tf+mp×Tsl+Ninit×Tsl，或者n+min{Tf+mp×Tsl+Ninit×Tsl,Tproc}，或者n+max{Tf+mp×Tsl+Ninit×Tsl,Tproc}。其中，n代表时隙n。Tf、mp、Tsl参数的值参见上文介绍。可选地，Ninit可以是一个预设的值，或者为取值范围为0到CWp的随机数。
可选地，资源选择窗的起始位置可与LBT计数器N＝0的时隙有关，或者说，资源选择窗的起始位置与LBT成功时所在的时隙有关。例如，资源选择窗的起始位置为LBT计数器N＝0的时隙后的Tproc之后的时隙，或者说，资源选择窗的起始位置为LBT成功时的时隙经过Tproc之后的时隙。
可选地，资源选择窗的起始位置还可以与LBT计数器N＝N2的时隙有关。其中N2为整数。例如是预配置或者网络配置的值。例如，资源选择窗的起始位置为LBT计数器N＝N2的时隙后的Tproc之后的时隙。
在本实施例中，UE#1根据感知结果排除候选资源集中其他UE的预留资源可以有多种实现方式。下面分两种情况进行描述。
在第一种情况中，UE#1仅考虑LBT是否成功，并需要在LBT成功后立即接入信道并发送SL信息，则UE#1根据感知结果排除候选资源集中其他UE的预留资源的方式例如可以为：根据感知结果排除第一时隙之后的其他UE的预留资源，或者，UE#1在根据感知结果排除候选资源集中其他UE的预留资源时，不排除第一时隙；或者，UE#1选择第一时隙的资源；从而，第一时隙可用于传输SL信息。
在第二中情况中，UE#1不仅考虑LBT是否成功，还考虑感知结果，以避免UE之间的资源碰撞，则UE#1根据感知结果排除候选资源集中其他UE的预留资源的方式例如可以为：根据感知结果排除时隙n+Tproc之后的其他UE的预留资源，从而，UE#1可根据感知结果选择出可用于传输SL信息的资源。
应理解，上述UE#1根据感知结果排除候选资源集中其他UE的预留资源的方式是示例性地，在实际应用中，还可以按照其他方式排除候选资源集中其他UE的预留资源，本申请不予限定。
为便于描述，下面将进行资源选择时仅考虑LBT是否成功的实现方式记作方式1，将同时考虑LBT结果和感知结果的实现方式记作方式2。在方式1中，无论UE#1是否根据感知结果选择出了可用于传输SL信息的资源，UE#1均在LBT成功后立即发送SL信息。在方式2中，UE#1根据感知结果选择出可用于传输SL信息的资源后，如果LBT成功，则在该资源上发送SL信息。
其中，对于方式1，由于UE#1可在LBT第一次成功后可立即发送SL信息，因此有利于减小UE#1发送SL信息的时延。
可选地，在本实施例中，可以通过资源池级(预)配置或网络配置的方式使能上述方式1或方式2，或者说，可以通过资源池级(预)配置或网络配置的方式决定使用上述方式1或方式2选择用于传输SL信息的资源。
在一种可能的实现方式中，可默认使用方式1，如果通过资源池级(预)配置或网络 配置的方式使能了方式2，则使用方式2。
在另一种可能的实现方式中，可默认使用方式2，如果通过资源池级(预)配置或网络配置的方式使能了方式1，则使用方式1。
根据本实施例的方法，UE#1可在LBT成功后立即发送SL信息，因此能够保证各类UE接入信道的公平性，同时有利于减小UE#1发送SL信息的时延。
图10是本申请实施例提供的资源选择方法的另一例示意图。该方法1000可以包括S1010至S1030。
S1010，UE#1执行LBT。
S1020，UE#1在第一时隙上发送SL信息。其中，第一时隙包括UE#1执行LBT成功时所在的时隙或UE#1执行LBT成功时所在时隙的下一个时隙。
其中，S1010和S1020同前述方法实施例中的S610和S620，未避免重复，在此不再赘述。
为便于理解本实施例，下面主要以LBT成功时所在的时隙位于时隙n+Tproc之前，且LBT成功后立即接入信道并发送SL信息的情况为例进行示例性说明。也就是说，在不做特殊说明的情况下，在本实施例中，UE#1发送SL信息的时隙位于时隙n+Tproc之前，或者说，UE#1发送SL信息时，还未根据感知结果选择出可用于传输SL信息的资源。
S1030，UE#1发送第一控制信息，第一控制信息用于指示SL信息的第一预留资源。其中，第一预留资源是UE#1根据感知结果确定的资源。
应理解，这里的SL信息，即为S1020中UE#1在第一时隙上发送的SL信息。
在本实施例中，UE#1可在第二时隙上发送第一控制信息，其中，第二时隙位于时隙n+Tproc之后。从而，UE#1可通过发送第一控制信息，向其他UE指示UE#1的第一预留资源。
可以理解的是，由于第一控制信息是在时隙n+Tproc之后发送的，也就是说，UE#1在发送第一控制信息时，已经根据感知结果选择出了可用于发送SL信息的资源，因此，第一控制信息可用于指示基于感知结果的预留资源，也就是说，第一预留资源是根据感知结果的确定的资源。
其中，第一预留资源是根据感知结果确定的资源，或者还可理解为，第一预留资源中不包括其他UE的预留资源；或者还可以理解为，第一预留资源属于第一终端设备排除其他终端设备的预留资源后剩余的资源。第一控制信息用于指示基于感知结果的预留资源，还可理解为，UE#1在通过第一控制信息指示UE#1的SL信息的预留资源时，考虑了其他UE的预留资源，从而避免第一预留资源与其他UE的预留资源发生资源碰撞。
可选地，UE#1的第一预留资源所在的COT位于第一时隙所在的COT之后。
可选地，第一预留资源包括第一终端设备为待传输TB预留的资源。或者说，第一预留资源包括第一终端设备为传输下一个TB预留的资源。
可选地，UE#1的第一预留资源可包括以下资源中的至少一种：
重传预留资源、周期预留资源、重传预留资源的周期预留资源、下一个COT内的预留资源、当前COT内的预留资源、COT间的预留资源。其中，当前COT为第一时隙所在的COT。其中，周期预留资源可以理解为，下一个TB的预留资源，相应地，下一个TB的传输可以称为当前TB的周期传输。
举例来说，假设SL信息可通过多个TB进行发送，该多个TB包括TB1和TB2，其中，TB2为TB1在时域上的下一个TB，因此，对于TB1来说，TB2为TB1的下一个TB，TB2所在的时隙(或资源)可以称为TB1的周期预留资源。
(第一控制信息指示预留资源的方式)
在本实施例中，UE#1通过发送第一控制信息向其他UE指示第一预留资源的方式可以有多种，作为示例，下面给出两种可能的实现方式：
方式1：第一控制信息包括第一时间间隔，其中，第一时间间隔为第二时隙与第一预留资源所在的时隙之间的时间间隔。此时，第一控制信息可用于指示第二时隙后的第一时间间隔之后的时隙上的第一预留资源。例如，第二时隙位于时隙t，第一时间间隔为T1，则第一控制信息可用于指示时隙t+T1上的第一预留资源。
可选地，在方式1中，第一控制信息还可用于指示SL信息的重传信息的预留资源。
一示例，假设时隙t+T1为SL信息的初传信息的预留资源，B个重传信息在初传信息后连续传输，则第一控制信息可通过指示B的值的方式指示B个重传信息的预留资源。例如，B＝2，且B个重传信息在初传信息后连续传输，则第一控制信息还可用于指示时隙t+T1+1、t+T1+2分别为B个重传信息的预留资源。其中，第一预留资源包括该初传信息的预留资源和该B个重传信息的预留资源。
另一示例，假设时隙t+T1为SL信息的初传信息的预留资源，B个重传信息在初传信息后不连续传输，则第一控制信息可通过指示初传信息与B个重传信息的时间间隔{r1,r2,…,rB}的方式指示B个重传信息的预留资源。可选地，初传信息与B个重传信息的时间间隔可以用时间间隔的值进行表示，也可以用TRIV(time resource indication value)进行表示，本申请对此不做限定。例如，B＝2，且B个重传信息在初传信息后不连续传输，则第一控制信息还可用于指示时隙t+T1+r1、t+T1+r2分别为B个重传信息的预留资源。其中，第一预留资源包括该初传信息的预留资源和该B个重传信息的预留资源。
方式2：第一控制信息包括第二时间间隔和周期，其中，第二时间间隔为第一时间间隔与周期的差值，该周期为UE#1发送SL信息的周期。此时，第一时间间隔可通过第二时间间隔与周期的和进行表示。例如，第二时隙位于时隙t，第二时间间隔为T2，周期为Prsvp，其中，T2＝T1-Prsvp，则第一控制信息可用于指示时隙t+T2+Prsvp上的第一预留资源。
类似地，在方式2中，第一控制信息也可用于指示SL信息的重传信息的预留资源。
例如，假设时隙t+T2+Prsvp为SL信息的初传信息的预留资源，B＝2，且B个重传资源在初传资源后连续传输，则第一控制信息可用于指示时隙t+T2+Prsvp+1、t+T2+Prsvp+2分别为B个重传信息的预留资源。又例如，B＝2，且B个重传资源在初传资源后不连续传输，初传信息与B个重传信息的时间间隔分别为{r1,r2,…,rB}，则第一控制信息还可用于指示时隙t+T2+Prsvp+r1、t+T2+Prsvp+r2分别为B个重传信息的预留资源。其中，第一预留资源包括该初传信息的预留资源和该B个重传信息的预留资源。
作为一个可选的实施例，第一控制信息还可以包括第一时间间隔T1和周期Prsvp。此时，第一控制信息还可用于指示时隙t+T1+q×Prsvp上的第一预留资源。可选地，当第一控制信息包括第二时间间隔T2和周期Prsvp时，第一控制信息还可用于指示时隙t+T2+q×Prsvp上的第一预留资源。其中，q为大于或等于1的整数。
一种可能的实现方式，第一控制信息可通过该第一控制信息中的周期字段和/或其他 字段(例如，记为第一字段)指示第一时间间隔，以实现上述方式1。
另一种可能的实现方式，第一控制信息可通过该第一控制信息中的第一字段和周期字段联合指示第二时间间隔和周期，以实现上述方式2。例如，第一字段指示第二时间间隔，周期字段指示周期；又例如，第一字段指示周期，周期字段指示第二时间间隔。
可选地，可通过某个字段(例如，记为第二字段)指示该周期字段用于指示周期或第一时间间隔。例如，第二字段为0时，周期字段指示周期，第二字段为1时，周期字段指示第一时间间隔；再例如，第二字段为1时，周期字段指示周期；第二字段为0时，周期字段指示第一时间间隔。
其中，指示第一时间间隔/第二时间间隔，还可以理解为，指示第一时间间隔/第二时间间隔的值，或者，指示第一时间间隔/第二时间间隔的信息。其中，指示周期，还可以理解为，指示周期值，或者，指示周期的信息。
可选地，第二时间间隔可为正值、负值或0。
一种可能的情况，第二时间间隔小于第三时间间隔；又一种可能的情况，第二时间间隔的绝对值小于第三时间间隔。作为示例，第三时间间隔例如为c×周期，其中，c的取值范围为[0，1]。
可选地，第一控制信息可承载于SCI、MAC CE、RRC或PC-5RRC中的任意一种。
可选地，可通过预配置或网络配置的方式，指示第一控制信息承载于SCI、MAC CE、RRC或PC-5RRC中的任意一种。例如，可通过预配置或网络配置的方式，指示第一控制信息承载于MAC CE。
一种可能的情况，第一控制信息可承载于MAC CE。该MAC子头中包括LCID(Logical Channel ID)值，LCID值可用于指示MAC CE承载第一控制信息。其中。LCID值对应的十进制值的取值范围为20～61的整数。
一种可能的情况，第一控制信息可承载于SCI。该SCI中包括用于指示该SCI承载第一控制信息的比特位。一示例，当该比特位的值为0时，表示该SCI用于承载第一控制信息。另一示例，当该比特位的值为1时，表示该SCI用于承载第一控制信息。
在本实施例中，第一控制信息可以在第一COT内发送，也可以在第二COT内发送，其中，第一COT为第一时隙所在的COT，或者说，SL信息是在第一COT内发送的。第一COT还可以称为当前COT。
作为一个示例，第一控制信息可以在第一COT内发送，此时，第一时隙位于第二时隙之前。
作为另一个示例，第一控制信息可以在第二COT内发送，此时，第一COT在时域上位于第二COT之前。
换句话说，第一控制信息可以与第一时隙上的SL信息在同一COT内发送，也可以与第一时隙上的SL信息在不同COT内发送。或者也可以理解为，第二时隙与第一时隙可以在同一COT内，也可以在不同COT内。当第一控制信息与SL信息在同一COT内发送时，第一时隙位于第二时隙之前；当第一控制信息与SL信息在不同COT内发送时，SL信息所在的COT位于第一控制信息所在的COT之前。
图11和图12分别示出了在第一COT内发送第一控制信息和在第二COT内发送第一控制信息的示意图。其中，第一控制信息可用于指示第一预留资源。
还应理解，在图11和图12中，时隙n为UE#1开始执行LBT的时隙；时隙m为UE#1执行LBT成功时所在的时隙；时隙n+Tproc为UE#1根据感知结果选择出可用于传输SL信息的时隙。
如图11所示，第一控制信息可以在第一COT内发送，或者说，第二时隙与第一时隙可以在同一COT内。其中，第一时隙位于第二时隙之前。可选地，第二时隙位于时隙n+Tproc之后，且第二时隙位于第一COT的倒数第A个时隙，A的取值例如为1。
如图12所示，第一控制信息还可以在第二COT内发送，或者说，第二时隙与第一时隙可以在不同COT内。其中，第一COT在时域上位于第二COT之前。
可选地，第二COT可以是通过类型1LBT接入信道确定的，也可以是通过类型2 LBT接入信道确定的，本申请不予限定。
应理解，在本实施例中，SL信息可对应于某个业务，在某些场景中，SL信息也可以替换为该SL信息对应的业务。
在一种可能的实现方式中，UE#1的多个不同业务可以在同一COT内传输。
为便于描述，下面以UE#1的2个业务(业务1和业务2)在同一COT内传输为例进行示例性说明。
假设业务1在第一COT内传输A次的信道占用时间小于最大信道占用时间，则UE#1还可以在第一COT内传输业务2。
图13和图14示出了业务1和业务2在同一COT内进行传输的示意图。
其中，业务1和业务2的信道占用时间不超过最大信道占用时间。可选地，业务1的优先级值或CAPC大于或等于业务2的优先级值或者CAPC。
在图13和图14中，时隙n1为UE#1开始为业务1执行LBT的时隙(触发资源选择的时隙)，时隙n2为UE#1开始为业务2进行资源选择的时隙。时隙n1+Tproc为根据业务1的传输参数处理完的感知结果的时隙，或者说，根据感知结果选择出可用于传输该业务1的资源的时隙；时隙n2+Tproc为根据业务2的传输参数处理完的感知结果的时隙，或者说，根据感知结果选择出可用于传输该业务2的资源的时隙。
如图13和图14所示，业务1在第一COT内进行了1次初传(用TB 1-1表示)和2次重传(分别用TB 1-2和TB 1-3表示)，业务2在第一COT内进行了1次初传(用TB 2-1表示)和1次重传(用TB 2-2表示)。
其中，业务1的第一控制信息(例如承载于图13、图14中的SCI 1)在时隙n1+Tproc之后发送。业务1的第一控制信息可以和该业务1在同一COT内传输(如图13所示)，也可以和该业务1在不同COT内传输(如图14所示)。业务1的第一控制信息可用于指示业务1的第一预留资源。为简洁，图13和图14仅示出了业务1的第一预留资源中的部分资源(如TB 1-1的周期预留资源)。
类似地，业务2的第一控制信息(例如承载于图13、图14中的SCI 2)在时隙n2+Tproc之后发送。业务2的第一控制信息可以和该业务2在同一COT内传输(如图13所示)，也可以和该业务2在不同COT内传输(如图14所示)。业务2的第一控制信息可用于指示业务2的第一预留资源。为简洁，图13和图14仅示出了业务2的第一预留资源中的部分资源(如TB 2-1的周期预留资源)
可以理解的是，业务1、业务2、业务1的第一控制信息、业务2的第一控制信息在 时域上的传输顺序可以有多种形式。
示例性地，传输顺序可以是：业务1的A次传输、业务1的第一控制信息、业务2的B次传输、业务2的第一控制信息；还可以是：业务1的A次传输、业务2的B次传输、业务1的第一控制信息、业务2的第一控制信息。其中，A、B为正整数。例如，在图13和14中，A为3，B为2。
可选地，当第一控制信息承载于SCI时，多个业务的第一控制信息可以在同一时隙内发送，例如，业务1的第一控制信息和业务2的第一控制信息可以由同一个SCI承载。多个业务的第一控制信息也可以在不同的时隙内发送，例如，业务1的第一控制信息和业务2的第一控制信息可以分别由不同SCI承载。
可选地，当第一控制信息承载于MAC CE时，多个业务的第一控制信息可以在同一时隙内发送，例如，在一个时隙中发送两个MAC CE，该两个MAC CE可分别承载业务1的第一控制信息和业务2的第一控制信息。多个业务的第一控制信息也可以在不同的时隙内发送。
根据本实施例的方法，通过在同一COT内传输多个业务(例如，业务1和业务2)，能够避免业务2重新按照类型1LBT接入信道，从而减少了信道接入时间。
可选地，在本实施例中，SL信息包括第二控制信息，第二控制信息可用于指示UE#1的第二预留资源。
其中，SL信息包括第二控制信息，还可以理解为，承载SL信息的资源同时也是承载第二控制信息的资源。
在一种可能的实现方式中，SL信息是在时隙n+Tproc之前发送的，也就是说，第二控制信息是在时隙n+Tproc之前发送的，或者说，UE#1在发送第二控制信息时，还未根据感知结果选择出可用于发送SL信息的资源。
因此，一种可选的实现方式为，第二控制信息不用于指示周期预留资源，以避免预留到其他UE的预留资源，即避免不恰当的资源预留。在该情况下，第二控制信息的周期字段可以是固定值，例如0，或者，第二控制信息的周期字段可省略或无效。
另一种可选的实现方式为，第二控制信息用于指示当前COT内(例如，第一COT)的预留资源，或者说，第二预留资源位于当前COT内。
可选地，第二控制信息可用于指示以下预留资源中的至少一种，或者说，第二预留资源可包括以下预留资源中的至少一种：
当前COT内的预留资源、当前COT内的重传预留资源、当前COT内的周期预留资源。其中，当前COT为第一时隙所在的COT。
在该实现方式中，由于UE#1在发送第二控制信息时，还未根据感知结果选择出可用于UE#1发送SL信息的资源，因此UE#1可通过第二控制信息指示当前COT内的预留资源，而不通过第二控制信息指示下一个COT内的预留资源，从而有利于避免预留到其他UE的预留资源，即避免不恰当的资源预留。
可选地，第二控制信息还可以包括物理层优先级、DMRS模式(pattern)等信息中的至少一项。
在一种可能的实现方式中，SL信息包括PSCCH和PSSCH，其中，PSCCH可用于承载第二控制信息，PSSCH可用于承载数据信息。
可选地，第二控制信息例如可以由一阶SCI承载。该一阶SCI中可包括用于指示该一阶SCI承载第二控制信息的比特位。一示例，当该比特位的值为0时，表示该一阶SCI用于承载第二控制信息。另一示例，当该比特位的值为1时，表示该一阶SCI用于承载第二控制信息。
可选地，可通过一阶SCI中的某个比特位指示该一阶SCI用于承载第一控制信息或第二控制信息。一示例，当该比特位的值为0时，表示该一阶SCI用于承载第二控制信息；当该比特位的值为1时，表示该一阶SCI用于承载第一控制信息。另一示例，当该比特位的值为1时，表示该一阶SCI用于承载第二控制信息；当该比特位的值为1时，表示该一阶SCI用于承载第一控制信息。
可选地，可通过某个字段(例如，记为第三字段)是否省略(omit)指示该一阶SCI用于承载第一控制信息或第二控制信息。例如，第三字段省略(omit)，该一阶SCI用于承载第一控制信息；第三字段存在，该一阶SCI用于承载第二控制信息。
可选地，可根据某个字段(例如，记为第三字段)是否为0bit指示该一阶SCI用于承载第一控制信息或第二控制信息。例如，第三字段为0bit，该一阶SCI用于承载第一控制信息；第三字段不为0bit，该一阶SCI用于承载第二控制信息。
在一种可能的实现方式中，第一控制信息用于指示SL信息的第一预留资源，还可以理解为，第一控制信息用于指示第二控制信息所在资源中的数据的第一预留资源。
作为示例，通过第一控制信息指示第二控制信息所在资源中的数据的第一预留资源的方式例如可以为：第一控制信息指示的标识信息与第二控制信息指示的标识信息相同，或者，第一控制信息指示的标识信息与第二控制信息指示的标识信息的部分比特位相同，或者，第一控制信息指示的标识信息的部分比特位与第二控制信息指示的标识信息相同。
一种可能的情况，第一控制信息由一阶SCI承载，则第一控制信息指示的标识信息，还可以理解为，第一控制信息指示二阶SCI，该二阶SCI包括的标识信息；另一种可能的情况，第一控制信息由一阶SCI和二阶SCI承载，则第一控制信息指示的标识信息，还可以理解为，该二阶SCI包括的标识信息。
类似地，对于第二控制信息，一种可能的情况，第一控制信息由一阶SCI承载，则第一控制信息指示的标识信息，还可以理解为，第一控制信息指示二阶SCI，该二阶SCI包括的标识信息；另一种可能的情况，第一控制信息由一阶SCI和二阶SCI承载，则第一控制信息指示的标识信息，还可以理解为，该二阶SCI包括的标识信息。
作为示例，第一控制信息可指示以下标识信息中的至少一种：第一源ID信息、第一目的ID信息、第一UE ID信息。第二控制信息可指示以下标识信息中的至少一种：第二源ID信息、第二目的ID信息、第二UE ID信息。
示例性地，通过第一控制信息指示第二控制信息所在资源中的数据的第一预留资源例如可以包括以下几种情况：
情况1：第一源ID信息、第一目的ID信息，分别与第二源ID信息、第二目的ID信息相同；或者，第一源ID信息、第一目的ID信息，分别与第二源ID信息的部分比特位、第二目的ID信息的部分比特位相同；或者，第一源ID信息的部分比特位、第一目的ID信息的部分比特位，分别与第二源ID信息、第二目的ID信息相同。
情况2：第一源ID信息、第一目的ID信息、第一UE ID信息，分别与第二源ID信 息、第二目的ID信息、第二UE ID信息相同；或者，第一源ID信息、第一目的ID信息、第一UE ID信息，分别与第二源ID信息的部分比特位、第二目的ID信息的部分比特位、第二UE ID信息的部分比特位相同；或者，第一源ID信息的部分比特位、第一目的ID信息的部分比特位、第一UE ID信息的部分比特位，分别与第二源ID信息、第二目的ID信息、第二UE ID信息相同。
根据本实施例的方法，由于LBT成功时，UE#1可能还未根据感知结果选择出可用于传输SL信息的资源，因此，UE#1可以先发送SL信息，或者说，先接入信道，直到根据感知结果选择出可用于传输SL信息的资源，再通过发送第一控制信息向其他UE指示自身的预留资源。由于UE#1在通过第一控制信息指示预留资源时，考虑了感知结果，或者说，考虑了其他UE的预留资源，因此能够避免UE#1的预留资源与其他UE的预留资源发生资源碰撞。
上文结合图6至图14介绍了UE#1根据LBT结果选择发送SL信息的资源的方法，并且介绍了通过发送第一控制信息和/或第二控制信息向其他UE指示自身的预留信息的方法。
应理解，图6至图14中的方法由UE#1执行仅为示例性说明，该UE#1还可以替换为其他任意UE，例如UE#2。
下面结合图15至图20介绍其他UE(例如UE#2)根据UE#1发送的第一控制信息和/或第二控制信息排除UE#1的预留资源的方法。
为便于描述，下面以该方法由UE#2执行为例进行示例性说明。
图15是本申请实施例提供的资源选择方法的另一例示意图。该方法1500可以包括S1510至S1540。
S1510，UE#2接收来自UE#1的第一控制信息，第一控制信息用于指示UE#1的第一预留资源，第一预留资源与UE#1在第一时隙发送的第一SL信息相关，其中，第一时隙包括UE#1执行LBT成功时所在的时隙或UE#1执行LBT成功时所在时隙的下一个时隙。
其中，UE#2(即第二终端设备的一例)接收来自UE#1的第一控制信息，还可以理解为，UE#2检测来自UE#1的第一控制信息。
其中，第一控制信息用于指示UE#1的第一预留资源，还可以理解为，第一控制信息用于指示UE#1发送的SL信息的第一预留资源。
其中，第一预留资源与UE#1在第一时隙发送的第一SL信息相关，可以理解为，第一预留资源是为第一时隙上的第一SL信息所预留的，或者说，第一预留资源是第一时隙上的第一SL信息的预留资源。
可选地，第一预留资源所在的COT位于第一时隙所在的COT之后。
在本实施例中，UE#1可以先在第一时隙上发送第一SL信息，之后再通过第一控制信息指示第一预留资源。例如，UE#1可以在根据感知结果选择出可用于传输第一SL信息的资源之后再发送第一控制信息，从而，能够避免不恰当的资源预留。
可选地，第一控制信息例如可以是前述方法实施例的S1030中的第一控制信息。有关第一控制信息的详细介绍可以参考前述方法实施例中的S1030，为避免重复，这里不再赘述。
S1520，UE#2根据第一控制信息，在除第一预留资源之外的资源中确定用于发送第二 SL信息的资源。
其中，在除第一预留资源之外的资源中确定用于发送第二SL信息的资源，或者还可以理解为，在除第一预留资源之外的资源上发送第二SL信息。
在一种可能的实现方式中，UE#2在发送第二SL信息前，UE#1在除第一预留资源之外的资源中确定用于发送第二SL信息的资源的方式例如可为：UE#2的根据第一控制信息从UE#2的候选资源集中排除UE#1的第一预留资源，以避免UE#2在UE#1的第一预留资源上发送第二SL信息所导致的资源碰撞。
在一种可能的实现方式中，第一预留资源包括第一控制信息所在时隙后的第一时间间隔之后的预留资源。
应理解，第一控制信息所在时隙，还可以理解为，第一控制信息所占用的时隙，或者还可以理解为，UE#1发送第一控制信息时的时隙。
在本实施例中，UE#2根据第一控制信息排除UE#1的第一预留资源的方式可以有多种，作为示例，下面介绍两种可能的实现方式：
方式1：第一控制信息包括第一时间间隔。此时，UE#2可根据第一控制信息，排除第一控制信息所在时隙后的第一时间间隔之后的第一预留资源。例如，第一控制信息所在的时隙为时隙t，第一时间间隔为T1，则UE#2可根据第一控制信息，排除时隙t+T1处的第一预留资源。
图16示出了根据方式1排除UE#1的第一预留资源的一例示意图。其中，第一时间间隔为T1，UE#1可根据T1排除UE#1的第一预留资源(即TB 2所在的时隙)。其中，TB 2所在的时隙还可以称为TB 1的周期预留资源。
可选地，第一预留资源可以包括第一SL信息的初传信息的预留资源和B个重传信息的预留资源。
可选地，在方式1中，假设时隙t+T1为第一SL信息的初传信息的预留资源，若第一控制信息还指示了B个重传信息的预留资源，则UE#2还可根据第一控制信息排除该B个重传信息的预留资源。例如，B＝2，B个重传信息在初传信息后连续传输，且第一控制信息指示了B的值(即2)，则UE#2可根据第一控制信息排除时隙t+T1+1、t+T1+2处的第一预留资源。又例如，B＝2，B个重传信息在初传信息后不连续传输，且第一控制信息指示了初传信息与B个重传信息的时间间隔为{r1,r2}，则UE#2可根据第一控制信息排除时隙t+T1+r1、t+T1+r2处的第一预留资源。
方式2：第一控制信息包括第二时间间隔和周期，其中，第二时间间隔是第一时间间隔与周期的差值。此时，第一时间间隔可通过第二时间间隔与周期的和进行表示。例如，第一控制信息所在的时隙为时隙t，第二时间间隔为T2，周期为Prsvp，其中，T2＝T1-Prsvp，则UE#2可根据第一控制信息，排除时隙t+T2+Prsvp处的第一预留资源。
类似地，在方式2中，假设时隙t+T2+Prsvp为第一SL信息的初传信息的预留资源，若第一控制信息还指示了B个重传信息的预留资源，则UE#2还可根据第一控制信息排除该B个重传信息的预留资源。例如，B＝2，B个重传信息在初传信息后连续传输，且第一控制信息指示了B的值(即2)，则UE#2可根据第一控制信息排除时隙t+T2+Prsvp+1、t+T2+Prsvp+2处的第一预留资源。又例如，B＝2，B个重传信息在初传信息后不连续传输，且第一控制信息指示了初传信息与B个重传信息的时间间隔为{r1,r2}，则UE#2可根据第 一控制信息排除时隙t+T2+Prsvp+r1、t+T2+Prsvp+r2处的第一预留资源。
作为一个可选的实施例，若第一控制信息包括第一时间间隔T1和周期Prsvp，则UE#2还可以根据第一控制信息排除时隙t+T1+q×Prsvp处的第一预留资源。类似地，当第一控制信息包括第二时间间隔T2和周期Prsvp时，UE#2还可以根据第一控制信息排除时隙t+T2+q×Prsvp处的第一预留资源。其中，q为大于或等于1的整数。
可选地，若第一预留资源位于UE#2的资源选择窗内，或者说，第一预留资源属于UE#2的候选资源集，则UE#1排除该第一预留资源，
可选地，若第一预留资源的RSRP测量值大于第一信号强度阈值，则UE#2排除该第一预留资源。其中，第一信号强度阈值与UE#1的物理层优先级和/或UE#2的物理层优先级有关。
可选地，方法1500还可以包括S1530，UE#2接收来自UE#1的第二控制信息，第二控制信息用于指示UE#1的第二预留资源，其中，第二预留资源与第一时隙位于同一COT内。
可选地，第二控制信息例如可以是前述方法实施例的S1030中的第二控制信息。有关第二控制信息的详细介绍可以参考前述方法实施例中的S1030，为避免重复，这里不再赘述。
可选地，方法1500还可以包括S1540，UE#2根据第二控制信息，在除第二预留资源之外的资源中确定用于发送第二SL信息的资源。
其中，在除第二预留资源之外的资源中确定用于发送第二SL信息的资源，或者还可以理解为，在除第二预留资源之外的资源上发送第二SL信息。
也就是说，在一种可能的实现方式中，UE#2在选择发送第二SL信息的资源时，不仅要根据第一控制信息排除UE#1的第一预留资源，还要根据第二控制信息排除UE#1的第二预留资源。
根据本实施例的方法，UE#2可根据来自UE#1的控制信息(例如，第一控制信息，又例如，第二控制信息)，在除UE#1的预留资源(例如，第一预留资源，又例如，第二预留资源)之外的资源中确定用于发送第二SL信息的资源，因此能够避免在UE#1的预留资源上发送第二SL信息，从而提高了UE#1发送第一SL信息的可靠性。
图17是本申请实施例提供的资源选择方法的另一例示意图。该方法1700可以包括S1710和S1720。
S1710，UE#2接收来自UE#1的控制信息，控制信息用于指示UE#1的预留资源。
应理解，本实施例提供的方法可以适用于各种控制信息指示了预留资源的场景，也就是说，在本实施例中，来自UE#1的控制信息例如可以是以下控制信息中的至少一种：S1030中的第一控制信息、S1030中的第二控制信息、其他指示了的预留资源的控制信息，对此不做限制。相应地，本实施例中的预留资源例如可以是以下预留资源中的至少一种：S1030中的第一预留资源、S1030中的第二预留资源、其他通过控制信息指示的预留资源，对此不做限制。
还应理解，本实施例提供的方法可以在前述方法1500的基础上实施，还可以独立实施，本申请不予限定。
S1720，UE#2根据控制信息，在除UE#1的预留资源和第一资源之外的资源中确定用 于发送SL信息的资源，其中，第一资源与UE#1的预留资源在时域上相邻。
在S1720中，UE#2可根据来自UE#1的控制信息，在除UE#1的预留资源和第一资源之外的资源中确定用于发送SL信息的资源，以避免UE#2在UE#1的预留资源和第一资源上发送SL信息。
换句话说，在本实施例中，UE#2不但需要满足在除UE#1的预留资源之外的资源中确定用于发送SL信息的资源，还需要满足在除第一资源之外的资源中确定用于发送SL信息的资源。或者说，UE#2不但需要排除UE#1的预留资源，还需要额外排除与该预留资源在时域上相邻的资源。
可选地，UE#2在除UE#1的预留资源和第一资源之外的资源中确定用于发送SL信息的资源，可通过以下任一种方式实现：
UE#2从该UE#2的候选资源集中排除UE#1的预留资源和第一资源；或者，UE#2在除UE#1的预留资源和第一资源之外的资源上发送SL信息；或者，UE#2在UE#1的预留资源和第一资源所在时隙之后发送SL信息；或者，UE#2在UE#1的预留资源和第一资源所在的时隙取消COT内的SL传输；或者，令UE#2的资源选择窗的起始位置位于UE#1的预留资源和第一资源所在时隙之后。其中，第一资源所在时隙是与UE#1的预留资源所在的时隙相邻的预设时段，或者说，第一资源与UE#1的预留资源在时域上相邻。
可选地，第一资源所在时隙可以是UE#1的预留资源所在时隙前的预设时段。
应理解，在本申请中，第一资源所在时隙，还可以理解为，预留资源所占用的时隙；预留资源所在时隙，还可以理解为，预留资源所占用的时隙。
由于UE#2在该预留资源所在时隙前的预设时段内发送SL信息，可能会导致UE#1在该预留资源所在时隙前的LBT失败，从而导致UE#1无法在该预留资源上发送SL信息，因此，通过额外排除该预留资源所在时隙前的预设时段，有利于避免UE#1在该预留资源所在时隙前执行LBT失败，从而提高了UE#1发送SL信息的可靠性。
可选地，第一资源所在时隙还可以是UE#1的预留资源所在时隙后的预设时段。
由于UE#1执行LBT成功时的时隙可能晚于UE#1的预留资源所在的时隙，因此，UE#2还可以额外排除该预留资源所在时隙后的预设时段，这样，即便UE#1无法在UE#1的预留资源上发送SL信息，但由于UE#2排除了该预留资源所在时隙后的预设时段，因此，如果UE#1在该预留资源所在时隙后的预设时段内执行LBT成功，仍然可以接入信道并成功发送SL信息，从而提高了UE#1发送SL信息的成功率和可靠性。
可选地，第一资源还可以同时包括UE#1的预留资源所在时隙前的预设时段，以及UE#1的预留资源所在时隙后的预设时段。
图18示出了排除UE#1的预留资源和第一资源的一例示意图。其中，第一资源包括UE#1的预留资源所在时隙前的预设时段，以及UE#1的预留资源所在时隙后的预设时段。
可选地，UE#2排除UE#1的预留资源和第一资源还可以通过以下方式实现：
UE#2根据UE#1的预留资源和第一资源所在的时隙确定UE#2的COT在时域上的结束位置。例如，当第一资源所在时隙为UE#1的预留资源所在时隙前的预设时段时，UE#2可将COT的结束位置确定为第一资源所在时隙之前。又例如，当第一资源所在时隙为UE#1的预留资源所在时隙后的预设时段时，UE#2可将COT的结束位置确定为UE#1的预留资源所在时隙之前。再例如，当第一资源同时包括UE#1的预留资源所在时隙前的预设时段， 以及UE#1的预留资源所在时隙后的预设时段时，UE#2可将COT的结束位置确定为UE#1的预留资源所在时隙前的预设时段之前。从而，能够使得UE#2在UE#1的预留资源和第一资源所在的时隙不发送SL信息。
可选地，对于UE#2还未接入信道的场景，UE#2还可以通过以下方式中的一种排除UE#1的预留资源和第一资源：UE#2在UE#1的预留资源所在的时隙和第一资源所在的时隙，不执行LBT；或者，UE#2根据UE#1的预留资源和第一资源所在时隙确定UE#2执行LBT的时刻或时段；或者，UE#2在UE#1的预留资源所在的时隙和第一资源所在的时隙，不测量信道是否被占用。
其中，不执行LBT可包括以下两种情况：
情况1：UE#2在UE#1的预留资源所在的时隙和第一资源所在的时隙不执行LBT，直到UE#1的预留资源和第一资源所在时隙之后开始执行LBT。
情况2：UE#2在UE#1的预留资源所在的时隙和第一资源所在的时隙之前执行LBT(LBT尚未成功)，但在UE#1的预留资源所在的时隙和或第一资源所在的时隙暂停执行LBT，即UE#2开始执行LBT后暂停执行LBT。
图19示出了排除UE#1的预留资源和第一资源的另一例示意图。其中，第一资源包括UE#1的预留资源所在时隙前的预设时段。
如图19所示，UE#2在UE#1的预留资源和第一资源所在时隙不执行LBT。直到UE#1的预留资源和第一资源所在时隙之后开始执行LBT。
图20示出了排除UE#1的预留资源和第一资源的另一例示意图。其中，第一资源包括UE#1的预留资源所在时隙前的预设时段。
如图20所示，UE#2在UE#1的预留资源和第一资源所在时隙之前执行LBT(LBT尚未成功)，但在UE#1的预留资源和第一资源所在时隙不执行LBT。或者说，UE#2在UE#1的预留资源和第一资源所在时隙暂停执行LBT。
其中，暂停执行LBT例如可以通过暂停LBT计数器(LBT计数器的值不减小)的方式实现。
由于UE#2发送SL信息的时隙为UE#2执行LBT成功时所在的时隙或执行LBT成功时所在时隙的下一个时隙，因此，根据本实施例的方法，UE#2通过在UE#1的预留资源和第一资源所在时隙不执行LBT，能够避免UE#2在UE#1的预留资源和第一资源上发送SL信息，从而避免UE#1执行LBT失败，因此提高了UE#1发送SL信息的可靠性。
可选地，第一资源可以包括多个时隙；或者，第一资源可包括多个资源，该资源可以是时隙。
在一种可能的实现方式中UE#2可根据UE#1的物理层优先级、UE#1的CAPC、UE#2的物理层优先级、UE#2的CAPC中的至少一项确定第一资源的时域长度。其中，第一资源的时域长度还可以理解为第一资源在时域上所占的时间的长度。其中，UE#1的物理层优先级和/或CAPC可携带于UE#1的控制信息中。
可选地，第一资源的时域长度与UE#1的CAPC和/或UE#2的CAPC有关。例如，UE#1的CAPC值小，第一资源的时域长度越长。又例如，UE#2的CAPC值越小，第一资源的时域长度越短。
可选地，第一资源的时域长度与UE#1的优先级和/或UE#2的优先级有关。例如， UE#1的优先级值小，第一资源的时域长度越长。又例如，UE#2的优先级值越小，第一资源的时域长度越短。一示例，第一资源为UE#1的预留资源所在时隙前的预设时段或UE#1的预留资源所在时隙后的预设时段，则第一资源的时域长度可满足Tf+mp×Tsl+N×Tsl。
另一示例，第一资源同时包括UE#1的预留资源所在时隙前的预设时段，以及UE#1的预留资源所在时隙后的预设时段，则第一资源的时域长度可满足Tf+mp×Tsl+N×Tsl或Tf+mp×Tsl+N×Tsl+C。其中，mp的值可根据UE#1的CAPC确定，N的值可以是CWmin,、CWmax、或取值范围在[0，CWp]之间的随机数，CWmin,、CWmax、或CWp可根据UE#1的CAPC确定。其中，C为常数，可选地，C在不同的SCS下可以是不同的常数。
可选地，当满足以下条件中的至少一项时，UE#2可排除第一资源：UE#1的物理层优先级值小于第一优先级值、UE#1的CAPC小于第二优先级值、UE#1的物理层优先级值小于UE#2的物理层优先级值、UE#1的CAPC小于UE#2的CAPC。
可选地，当信道忙率(channel busy ratio，CBR)低于第一拥塞阈值，或异系统CBR低于第二拥塞阈值时，UE#2可排除第一资源。
其中，第一优先级值、第二优先级值、第一拥塞阈值、或第二拥塞阈可以是数值，或者也可以是数值范围，不予限制。该第一优先级值、第二优先级值、第一拥塞阈值、或第二拥塞阈，可以是协议预定义的定值，或者也可以是根据预先定义的规则生成的值，或者也可以是预先配置的定值，或者也可以是动态配置的值，不予限制。
根据本实施例的方法，UE#2不仅可以根据来自UE#1的控制信息排除UE#1的预留资源，还可以排除第一资源。当第一资源为UE#1的预留资源所在时隙前的预设时段时，有利于避免UE#1在该预留资源所在时隙前执行LBT失败，从而提高了UE#1发送SL信息的可靠性。当第一资源为UE#1的预留资源所在时隙后的预设时段时，若UE#1在该预留资源所在时隙前或在该预留资源所在时隙执行LBT未成功，还可以在该预留资源所在时隙后的预设时段内根据LBT结果发送SL信息，从而提高了UE#1发送SL信息的成功率和可靠性。
可以理解，本申请实施例中的图6至图20中的例子仅仅是为了便于本领域技术人员理解本申请实施例，并非要将本申请实施例限于例示的具体场景。本领域技术人员根据图6至图20的例子，显然可以进行各种等价的修改或变化，这样的修改或变化也落入本申请实施例的范围内。
还可以理解，本申请的各实施例中的一些可选的特征，在某些场景下，可以不依赖于其他特征，也可以在某些场景下，与其他特征进行结合，不做限定。
还可以理解，本申请的各实施例中的方案可以进行合理的组合使用，并且实施例中出现的各个术语的解释或说明可以在各个实施例中互相参考或解释，对此不做限定。
还可以理解，在本申请的各实施例中的各种数字序号的大小并不意味着执行顺序的先后，仅为描述方便进行的区分，不应对本申请实施例的实施过程构成任何限定。
还可以理解，在本申请各个实施例中涉及到的公式是示例性说明，其不对本申请实施例的保护范围造成限定。在计算上述各个涉及的参数的过程中，也可以根据上述公式进行计算，或者基于上述公式的变形进行计算，或者，按照本申请实施例提供的方法确定的公式进行计算，或者也可以根据其它方式进行计算以满足公式计算的结果。
还可以理解，在本申请的各实施例中的通信装置之间所传输的信息的名称，其命名不 对本申请实施例的保护范围造成限定。
还可以理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
还应理解，本文中涉及的第一、第二、#1、#2等各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。
还可以理解，上述各个方法实施例中，由终端设备(例如，第一终端设备；又例如，第二终端设备)实现的方法和操作，也可以由可由终端设备的组成部件(例如芯片或者电路)来实现，不做限定。
相应于上述各方法实施例给出的方法，本申请实施例还提供了相应的装置，所述装置包括用于执行上述各个方法实施例相应的模块。该模块可以是软件，也可以是硬件，或者是软件和硬件结合。可以理解的是，上述各方法实施例所描述的技术特征同样适用于以下装置实施例。
图21是本申请实施例提供的一种资源选择的装置的示意性框图。该装置2100包括收发单元2110和处理单元2120。收发单元2110可以用于实现相应的通信功能，如发送侧行信息。收发单元2110还可以称为通信接口或通信单元。处理单元2120可以用于实现相应的处理功能，如执行LBT。
可选地，该装置2100还包括存储单元，该存储单元可以用于存储指令和/或数据，处理单元2120可以读取存储单元中的指令和/或数据，以使得装置实现前述各个方法实施例中第一终端设备或第二终端设备的动作。
在第一种设计中，该装置2100可以是前述实施例中的UE#1，也可以是UE#1的组成部件(如芯片)。该装置2100可实现对应于上文方法实施例中的UE#1执行的步骤或者流程，其中，收发单元2110可用于执行上文方法实施例中UE#1的收发相关的操作，处理单元2120可用于执行上文方法实施例中UE#1的处理相关的操作。当该装置2100为UE#1时，收发单元2110可以是收发器，或，输入/输出接口；处理单元2120可以是至少一个处理器。可选地，收发器可以为收发电路。可选地，输入/输出接口可以为输入/输出电路。当该装置2100为UE#1中的芯片、芯片系统或电路时，收发单元2110可以是该芯片、芯片系统或电路上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等；处理单元2120可以是至少一个处理器、处理电路或逻辑电路等。
一种可能的实现方式，处理单元2120，用于执行先听后说LBT；收发单元2110，用于在第一时间单元上发送侧行信息，第一时间单元包括UE#1执行LBT成功时所在的时间单元或UE#1执行LBT成功时所在时间单元的下一个时间单元。
可选地，收发单元2110，还用于在第一时间单元和第一时间单元之后的至少一个时间单元上发送侧行信息。
可选地，收发单元2110，还用于在第二时间单元上发送第一控制信息，第一控制信息用于指示侧行信息的第一预留资源，其中，第一预留资源是UE#1根据感知结果确定的资源。
可选地，第一预留资源所在的信道占用时间COT位于第一时间单元所在的COT之后。
可选地，第一控制信息包括第一时间间隔，其中，第一时间间隔为第二时间单元与第一预留资源所在的时间单元之间的时间间隔；或者，第一控制信息包括第二时间间隔和周期，其中，第二时间间隔为第一时间间隔与周期的差值，周期为UE#1发送侧行信息的周期。
可选地，第二时间单元位于第一COT内，其中，第一COT为第一时间单元所在的COT，第一时间单元位于第二时间单元之前；或者，第二时间单元位于第二COT内，其中，第一COT位于第二COT之前。
可选地，侧行信息包括第二控制信息，第二控制信息用于指示UE#1的第二预留资源，第二预留资源与第一时间单元位于同一COT内。
可选地，第一控制信息指示的标识信息与第二控制信息指示的标识信息相同；或者，第一控制信息指示的标识信息为第二控制信息指示的标识信息的部分比特位；或者，第一控制信息指示的标识信息的部分比特位为第二控制信息指示的标识信息。
可选地，第一时间单元是UE#1根据感知结果确定的资源。
可选地，UE#1执行LBT成功之前，处理单元2120，还用于至少一次执行LBT成功。
在第二种设计中，该装置2100可以是前述实施例中的UE#2，也可以是UE#2的组成部件(如芯片)。该装置2100可实现对应于上文方法实施例中的UE#2执行的步骤或者流程，其中，收发单元2110可用于执行上文方法实施例中UE#2的收发相关的操作，处理单元2120可用于执行上文方法实施例中UE#2的处理相关的操作。当该装置2100为UE#2时，收发单元2110可以是收发器，或，输入/输出接口；处理单元2120可以是至少一个处理器。可选地，收发器可以为收发电路。可选地，输入/输出接口可以为输入/输出电路。当该装置2100为UE#2中的芯片、芯片系统或电路时，收发单元2110可以是该芯片、芯片系统或电路上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等；处理单元2120可以是至少一个处理器、处理电路或逻辑电路等。
一种可能的实现方式，收发单元2110，用于接收来自UE#1的第一控制信息，第一控制信息用于指示所述UE#1的第一预留资源，第一预留资源与UE#1在第一时间单元发送的第一侧行信息相关，其中，第一时间单元包括UE#1执行LBT成功时所在的时间单元或UE#1执行LBT成功时所在时间单元的下一个时间单元；处理单元2120，用于根据第一控制信息，在除第一预留资源之外的资源中确定用于发送第二侧行信息的资源。
可选地，处理单元2120，还用于从候选资源集中排除第一预留资源。
可选地，第一预留资源是UE#1根据感知结果确定的资源。
可选地，第一预留资源所在的信道占用时间COT位于第一时间单元所在的COT之后。
可选地，第一预留资源包括第一控制信息所在时间单元后的第一时间间隔之后的预留资源。
可选地，第一控制信息包括：第一时间间隔；或者，第二时间间隔和周期，其中，第二时间间隔为第一时间间隔与周期的差值，周期为UE#1发送第一侧行信息的周期。
另一种可能的实现方式，收发单元2110，用于接收来自UE#1的控制信息，控制信息用于指示UE#1的预留资源；处理单元2120，用于根据控制信息，在除预留资源和第一资源之外的资源中确定用于发送侧行信息的资源，其中，第一资源与预留资源在时域上相邻。
可选地，第一资源与预留资源在时域上相邻，包括：第一资源所在时间单元是预留资源所在时间单元前的预设时段；或者，第一资源所在时间单元是预留资源所在时间单元后的预设时段；或者，第一资源所在时间单元包括预留资源所在时间单元前的预设时段和预留资源所在时间单元后的预设时段。
可选地，处理单元2120，还用于从候选资源集中排除预留资源和第一资源。
可选地，处理单元2120，还用于在预留资源所在时间单元和第一资源所在时间单元，不执行LBT；或者，处理单元2120，还用于在预留资源所在时间单元和第一资源所在时间单元，不测量信道是否被占用。
应理解，各单元执行上述相应步骤的具体过程在上述各方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，这里的装置2100以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，装置2100可以具体为上述实施例中的UE#1，可以用于执行上述各方法实施例中与UE#1对应的各个流程和/或步骤；或者，装置2100可以具体为上述实施例中的UE#2，可以用于执行上述各方法实施例中与UE#2对应的各个流程和/或步骤，为避免重复，在此不再赘述。
上述各个方案的装置2100具有实现上述方法中设备(如UE#1，或UE#2)所执行的相应步骤的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块；例如收发单元可以由收发机替代(例如，收发单元中的发送单元可以由发送机替代，收发单元中的接收单元可以由接收机替代)，其它单元，如处理单元等可以由处理器替代，分别执行各个方法实施例中的收发操作以及相关的处理操作。
此外，上述收发单元2110还可以是收发电路(例如可以包括接收电路和发送电路)，处理单元2120可以是处理电路。
需要指出的是，图21中的装置可以是前述实施例中的设备(如UE#1，或UE#2)，也可以是芯片或者芯片系统，例如：片上系统(system on chip，SoC)。其中，收发单元可以是输入输出电路、通信接口；处理单元为该芯片上集成的处理器或者微处理器或者集成电路。在此不做限定。
如图22所示，本申请实施例提供另一种通信的装置2200。该装置2200包括处理器2210，处理器2210用于执行存储器2220存储的计算机程序或指令，或读取存储器2220存储的数据/信令，以执行上文各方法实施例中的方法。可选地，处理器2210为一个或多个。
可选地，如图22所示，该装置2200还包括存储器2220，存储器2220用于存储计算机程序或指令和/或数据。该存储器2220可以与处理器2210集成在一起，或者也可以分离设置。可选地，存储器2220为一个或多个。
可选地，如图22所示，该装置2200还包括收发器2230，收发器2230用于信号的接收和/或发送。例如，处理器2210用于控制收发器2230进行信号的接收和/或发送。
作为一种方案，该装置2200用于实现上文各个方法实施例中由UE#1执行的操作。
例如，处理器2210用于执行存储器2220存储的计算机程序或指令，以实现上文各个方法实施例中UE#1的相关操作。
作为另一种方案，该装置2200用于实现上文各个方法实施例中由UE#2执行的操作。
例如，处理器2210用于执行存储器2220存储的计算机程序或指令，以实现上文各个方法实施例中UE#2的相关操作。
应理解，本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器和/或非易失性存储器。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)。例如，RAM可以用作外部高速缓存。作为示例而非限定，RAM包括如下多种形式：静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)可以集成在处理器中。
还需要说明的是，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述各方法实施例中由设备(如UE#1，或UE#2)执行的方法的计算机指令。
例如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法各实施例中由UE#1执行的方法。
又如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法各实施例中由UE#2执行的方法。
本申请实施例还提供一种计算机程序产品，包含指令，该指令被计算机执行时以实现上述各方法实施例中由设备(如UE#1，或UE#2)执行的方法。
本申请实施例还提供一种通信的系统，包括前述的UE#1和UE#2。
上述提供的任一种装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它 的方式实现。例如，以上所描述的装置实施例仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。此外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。例如，所述计算机可以是个人计算机，服务器，或者网络设备等。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD)等。例如，前述的可用介质包括但不限于：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (50)

  1. 一种资源选择的方法，其特征在于，包括：
    第一终端设备执行先听后说LBT；
    所述第一终端设备在第一时间单元上发送侧行信息，所述第一时间单元包括所述第一终端设备执行LBT成功时所在的时间单元或所述第一终端设备执行LBT成功时所在时间单元的下一个时间单元。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端设备在所述第一时间单元上发送所述侧行信息，包括：
    所述第一终端设备在所述第一时间单元和所述第一时间单元之后的至少一个时间单元上发送所述侧行信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述第一终端设备在第二时间单元上发送第一控制信息，所述第一控制信息用于指示所述侧行信息的第一预留资源，其中，所述第一预留资源是所述第一终端设备根据感知结果确定的资源。
  4. 根据权利要求3所述的方法，其特征在于，
    所述第一预留资源所在的信道占用时间COT位于所述第一时间单元所在的COT之后。
  5. 根据权利要求3或4所述的方法，其特征在于，
    所述第一控制信息包括第一时间间隔，其中，所述第一时间间隔为所述第二时间单元与所述第一预留资源所在的时间单元之间的时间间隔；或者，
    所述第一控制信息包括第二时间间隔和周期，其中，所述第二时间间隔为所述第一时间间隔与所述周期的差值，所述周期为所述第一终端设备发送所述侧行信息的周期。
  6. 根据权利要求3至5中任一项所述的方法，其特征在于，
    所述第二时间单元位于第一COT内，其中，所述第一COT为所述第一时间单元所在的COT，所述第一时间单元位于所述第二时间单元之前；
    或者，所述第二时间单元位于第二COT内，其中，所述第一COT位于所述第二COT之前。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，
    所述侧行信息包括第二控制信息，所述第二控制信息用于指示所述第一终端设备的第二预留资源，所述第二预留资源与所述第一时间单元位于同一COT内。
  8. 根据权利要求7中任一项所述的方法，其特征在于，
    所述第一控制信息指示的标识信息与所述第二控制信息指示的标识信息相同；或者，
    所述第一控制信息指示的标识信息为所述第二控制信息指示的标识信息的部分比特位；或者，
    所述第一控制信息指示的标识信息的部分比特位为所述第二控制信息指示的标识信息。
  9. 根据权利要求1至8中任一项所述的方法，其特征在于，
    所述第一时间单元是所述第一终端设备根据感知结果确定的资源。
  10. 根据权利要求1至9中任一项所述的方法，其特征在于，所述第一终端设备执行所述LBT成功之前，所述方法还包括：
    所述第一终端设备至少一次执行LBT成功。
  11. 一种资源选择的方法，其特征在于，包括：
    第二终端设备接收来自第一终端设备的第一控制信息，所述第一控制信息用于指示所述第一终端设备的第一预留资源，所述第一预留资源与所述第一终端设备在第一时间单元发送的第一侧行信息相关，其中，所述第一时间单元包括所述第一终端设备执行LBT成功时所在的时间单元或所述第一终端设备执行LBT成功时所在时间单元的下一个时间单元；
    所述第二终端设备根据所述第一控制信息，在除所述第一预留资源之外的资源中确定用于发送第二侧行信息的资源。
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备从候选资源集中排除所述第一预留资源。
  13. 根据权利要求11或12所述的方法，其特征在于，
    所述第一预留资源是所述第一终端设备根据感知结果确定的资源。
  14. 根据权利要求11至13中任一项所述的方法，其特征在于，
    所述第一预留资源所在的信道占用时间COT位于所述第一时间单元所在的COT之后。
  15. 根据权利要求11至14中任一项所述的方法，其特征在于，
    所述第一预留资源包括所述第一控制信息所在时间单元后的第一时间间隔之后的预留资源。
  16. 根据权利要求15所述的方法，其特征在于，
    所述第一控制信息包括：所述第一时间间隔；或者，第二时间间隔和周期，
    其中，所述第二时间间隔为所述第一时间间隔与所述周期的差值，所述周期为所述第一终端设备发送所述第一侧行信息的周期。
  17. 一种资源选择的方法，其特征在于，包括：
    第二终端设备接收来自第一终端设备的控制信息，所述控制信息用于指示所述第一终端设备的预留资源；
    所述第二终端设备根据所述控制信息，在除所述预留资源和第一资源之外的资源中确定用于发送侧行信息的资源，其中，所述第一资源与所述预留资源在时域上相邻。
  18. 根据权利要求17所述的方法，其特征在于，所述第一资源与所述预留资源在时域上相邻，包括：
    所述第一资源所在时间单元是所述预留资源所在时间单元前的预设时段；或者，
    所述第一资源所在时间单元是所述预留资源所在时间单元后的预设时段；或者，
    所述第一资源所在时间单元包括所述预留资源所在时间单元前的预设时段和所述预留资源所在时间单元后的预设时段。
  19. 根据权利要求17或18所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备从候选资源集中排除所述预留资源和所述第一资源。
  20. 根据权利要求17或18所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备在所述预留资源所在时间单元和所述第一资源所在时间单元，不执行LBT；或者，
    所述第二终端设备在所述预留资源所在时间单元和所述第一资源所在时间单元，不测量信道是否被占用。
  21. 根据权利要求17或18所述的方法，其特征在于，所述第一资源的时域长度是根据所述第一终端设备的信道访问优先级类和/或所述第二终端设备的信道访问优先级类确定的。
  22. 根据权利要求19所述的方法，其特征在于，所述第二终端设备从候选资源集中排除所述第一资源包括：当满足第一条件时，所述第二终端设备从候选资源集中排除所述第一资源；
    其中，所述第一条件包括以下至少一项：
    所述第一终端设备的物理层优先级值小于第一优先级值；
    所述第一终端设备的信道访问优先级类小于第一优先级值；
    所述第一终端设备的物理层优先级值小于第二终端设备的物理层优先级值；
    所述第一终端设备的信道访问优先级小于第二终端设备的信道访问优先级；
    信道忙率低于第一拥塞阈值。
  23. 一种资源选择的方法，其特征在于，包括：
    第一终端设备执行先听后说LBT；
    所述第一终端设备在第一时间单元上发送侧行信息，所述第一时间单元包括所述第一终端设备执行LBT成功时所在的时间单元或所述第一终端设备执行LBT成功时所在时间单元的下一个时间单元；
    所述第一终端设备在第二时间单元上发送第一控制信息，所述第一控制信息用于指示所述侧行信息的第一预留资源，其中，所述第一预留资源是所述第一终端设备根据感知结果确定的资源；
    第二终端设备接收所述第一控制信息；
    所述第二终端设备根据所述第一控制信息，在除所述第一预留资源之外的资源中确定用于发送第二侧行信息的资源。
  24. 根据权利要求23所述的方法，其特征在于，所述第一终端设备在所述第一时间单元上发送所述侧行信息，包括：
    所述第一终端设备在所述第一时间单元和所述第一时间单元之后的至少一个时间单元上发送所述侧行信息。
  25. 根据权利要求23或24所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备从候选资源集中排除所述第一预留资源。
  26. 根据权利要求23至25中任一项所述的方法，其特征在于，
    所述第一预留资源所在的信道占用时间COT位于所述第一时间单元所在的COT之后。
  27. 根据权利要求23至26中任一项所述的方法，其特征在于，
    所述第一预留资源包括所述第一控制信息所在时间单元后的第一时间间隔之后的预 留资源。
  28. 根据权利要求23至27中任一项所述的方法，其特征在于，
    所述第一控制信息包括第一时间间隔，其中，所述第一时间间隔为所述第二时间单元与所述第一预留资源所在的时间单元之间的时间间隔；或者，
    所述第一控制信息包括第二时间间隔和周期，其中，所述第二时间间隔为所述第一时间间隔与所述周期的差值，所述周期为所述第一终端设备发送所述侧行信息的周期。
  29. 根据权利要求23至28中任一项所述的方法，其特征在于，
    所述第二时间单元位于第一COT内，其中，所述第一COT为所述第一时间单元所在的COT，所述第一时间单元位于所述第二时间单元之前；
    或者，所述第二时间单元位于第二COT内，其中，所述第一COT位于所述第二COT之前。
  30. 根据权利要求23至29中任一项所述的方法，其特征在于，
    所述侧行信息包括第二控制信息，所述第二控制信息用于指示所述第一终端设备的第二预留资源，所述第二预留资源与所述第一时间单元位于同一COT内。
  31. 根据权利要求30中任一项所述的方法，其特征在于，
    所述第一控制信息指示的标识信息与所述第二控制信息指示的标识信息相同；或者，
    所述第一控制信息指示的标识信息为所述第二控制信息指示的标识信息的部分比特位；或者，
    所述第一控制信息指示的标识信息的部分比特位为所述第二控制信息指示的标识信息。
  32. 根据权利要求23至31中任一项所述的方法，其特征在于，
    所述第一时间单元是所述第一终端设备根据感知结果确定的资源。
  33. 根据权利要求23至32中任一项所述的方法，其特征在于，所述第一终端设备执行所述LBT成功之前，所述方法还包括：
    所述第一终端设备至少一次执行LBT成功。
  34. 一种资源选择的方法，其特征在于，包括：
    第一终端设备发送控制信息，所述控制信息用于指示所述第一终端设备的预留资源；
    第二终端设备接收所述控制信息；
    所述第二终端设备根据所述控制信息，在除所述预留资源和第一资源之外的资源中确定用于发送侧行信息的资源，其中，所述第一资源与所述预留资源在时域上相邻。
  35. 根据权利要求34所述的方法，其特征在于，所述第一资源与所述预留资源在时域上相邻，包括：
    所述第一资源所在时间单元是所述预留资源所在时间单元前的预设时段；或者，
    所述第一资源所在时间单元是所述预留资源所在时间单元后的预设时段；或者，
    所述第一资源所在时间单元包括所述预留资源所在时间单元前的预设时段和所述预留资源所在时间单元后的预设时段。
  36. 根据权利要求34或35所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备从候选资源集中排除所述预留资源和所述第一资源。
  37. 根据权利要求34或35所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备在所述预留资源所在时间单元和所述第一资源所在时间单元，不执行LBT；或者，
    所述第二终端设备在所述预留资源所在时间单元和所述第一资源所在时间单元，不测量信道是否被占用。
  38. 根据权利要求34或35所述的方法，其特征在于，所述第一资源的时域长度为根据所述第一终端设备的信道访问优先级类和/或所述第二终端设备的信道访问优先级类确定的。
  39. 根据权利要求34或35所述的方法，其特征在于，所述方法还包括：
    所述第二终端设备从候选资源集中排除所述第一资源包括：当满足第一条件时，所述第二终端设备从候选资源集中排除所述第一资源；
    其中，所述第一条件包括以下至少一项：
    所述第一终端设备的物理层优先级值小于第一优先级值；
    所述第一终端设备的信道访问优先级类小于第一优先级值；
    所述第一终端设备的物理层优先级值小于第二终端设备的物理层优先级值；
    所述第一终端设备的信道访问优先级小于第二终端设备的信道访问优先级；
    信道忙率低于第一拥塞阈值。
  40. 一种资源选择的装置，其特征在于，包括：
    用于实现权利要求1至10中任一项所述的方法的单元；或者，用于实现权利要求11至16中任一项所述的方法的单元；或者，用于实现权利要求17至22中任一项所述的方法的单元。
  41. 一种通信的装置，其特征在于，包括：
    处理器，用于执行存储器中存储的计算机程序，以使得所述装置执行如权利要求1至10中任一项所述的方法；或者以使得所述装置执行如权利要求11至16中任一项所述的方法；或者以使得所述装置执行如权利要求17至22中任一项所述的方法。
  42. 根据权利要求41所述的装置，其特征在于，所述装置还包括所述存储器。
  43. 一种芯片，其特征在于，包括逻辑电路和通信接口，所述通信接口用于接收待处理的数据和/或信息，并将所述待处理的数据和/或信息传输至所述逻辑电路，所述逻辑电路用于执行如权利要求1至22中任一项所述的编码的处理，以及，所述通信接口还用于输出编码后的极化码字。
  44. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1至10中任意一项所述的方法，或者以使得所述计算机执行如权利要求11至16中任一项所述的方法，或者以使得所述计算机执行如权利要求17至22中任一项所述的方法。
  45. 一种计算机程序产品，其特征在于，所述计算机程序产品包括用于执行如权利要求1至10中任一项所述的方法的指令，或者，所述计算机程序产品包括用于执行如权利要求11至16中任一项所述的方法的指令，或者，所述计算机程序产品包括用于执行如权利要求17至22中任一项所述的方法的指令。
  46. 一种通信系统，其特征在于，包括第一终端设备和第二终端设备，所述第一终端设备用于执行如权利要求1至10中任一项所述的方法，所述第二终端设备用于执行如权 利要求11至16中任一项所述的方法。
  47. 一种通信系统，其特征在于，包括第一终端设备和第二终端设备，所述第一终端设备和所述第二终端设备用于执行如权利要求34至39中任一项所述的方法。
  48. 一种通信装置，其特征在于，所述通信装置用于执行如权利要求1至10中任一项所述的方法。
  49. 一种通信装置，其特征在于，所述通信装置用于执行如权利要求11至16中任一项所述的方法。
  50. 一种通信装置，其特征在于，所述通信装置用于执行如权利要求17至22中任一项所述的方法。
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