WO2021212505A1 - 一种通信方法、装置及系统 - Google Patents

一种通信方法、装置及系统 Download PDF

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Publication number
WO2021212505A1
WO2021212505A1 PCT/CN2020/086803 CN2020086803W WO2021212505A1 WO 2021212505 A1 WO2021212505 A1 WO 2021212505A1 CN 2020086803 W CN2020086803 W CN 2020086803W WO 2021212505 A1 WO2021212505 A1 WO 2021212505A1
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WIPO (PCT)
Prior art keywords
terminal device
time
frequency resource
information
sci
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PCT/CN2020/086803
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English (en)
French (fr)
Inventor
苏宏家
董蕾
向铮铮
卢磊
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20932427.6A priority Critical patent/EP4132028A4/en
Priority to BR112022021523A priority patent/BR112022021523A2/pt
Priority to PCT/CN2020/086803 priority patent/WO2021212505A1/zh
Priority to KR1020227040490A priority patent/KR20230006514A/ko
Priority to JP2022564463A priority patent/JP2023523257A/ja
Priority to CN202080099664.1A priority patent/CN115398939A/zh
Publication of WO2021212505A1 publication Critical patent/WO2021212505A1/zh
Priority to US17/968,837 priority patent/US20230044818A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/40Resource management for direct mode communication, e.g. D2D or sidelink
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/25Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30Services specially adapted for particular environments, situations or purposes
    • H04W4/40Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/535Allocation or scheduling criteria for wireless resources based on resource usage policies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/16Interfaces between hierarchically similar devices
    • H04W92/18Interfaces between hierarchically similar devices between terminal devices

Definitions

  • This application relates to the field of mobile communication technology, and in particular to a communication method, device and system.
  • the terminal device as the sender can send sidelink control information (sidelink control) to the terminal device as the receiver (called the receiver terminal device) within a time slot (slot).
  • information, SCI) and side line data the receiving end terminal device receives and decodes the side line data by receiving the SCI.
  • mode 1 the new radio (NR)-vehicle to everything (V2X) system
  • mode-2 the transmitting end terminal device selects resources by itself in mode-2.
  • the transmitting end terminal device triggers resource selection in time slot n, and obtains the listening result within a resource sensing window defined by the time slot range. According to the listening result, the transmitting terminal device excludes unavailable time-frequency resources in the resource selection window defined by the time slot range, obtains the time-frequency resources available in the resource selection window, and then selects the available time-frequency resources Determine the time-frequency resource belonging to the sidelink (SL), and then select the time-frequency resource from these time-frequency resources belonging to the sidelink to send data.
  • SL sidelink
  • the transmitting end terminal device only sends data according to the listening result of the transmitting end terminal device, but the transmitting end terminal device does not know the channel conditions around the receiving end terminal device. If there are other terminal devices communicating around the receiving end terminal device, but the sending end terminal device does not hear it, then for the receiving end terminal device, when it receives data from the sending end terminal device, it may be affected by other terminal devices.
  • the strong interference caused by the side-line communication of the terminal device causes poor signal reception quality of the terminal device at the receiving end, and may even fail to receive.
  • the embodiments of the present application provide a communication method, device, and system, which are used to improve the signal reception quality of the receiving end in the side-line communication process.
  • a first communication method comprising: detecting side control information from at least one second terminal device to determine a first time-frequency resource, the at least one second terminal device includes a third terminal device ,
  • the first time-frequency resource includes a time-frequency resource that cannot be used to send data to the third terminal device; sending first information to the third terminal device, and the first information is used to trigger the determination of the second information ;
  • Receiving the second information from the third terminal device the second information is used to indicate a second time-frequency resource, the second time-frequency resource is used to determine the time-frequency to send data to the third terminal device Resource; a third time-frequency resource is determined according to the first time-frequency resource and the second time-frequency resource; the first data is sent to the third terminal device through the third time-frequency resource.
  • the method may be executed by a first communication device, and the first communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the first communication device is a terminal device, and the terminal device is a terminal device, or a chip set in the terminal device for realizing the function of the terminal device, or other device used for realizing the function of the terminal device. part. In the following introduction process, it is assumed that the first communication device is the first terminal device.
  • the first terminal device as the data sending end can send the first information to the third terminal device, so that the third terminal device can send the second information to the first terminal device, and the second information can include the second information.
  • the time-frequency resource the first terminal device may use the second time-frequency resource as a reference factor when selecting the time-frequency resource.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device, indicating that if the first terminal device sends data to the third terminal device on the second time-frequency resource, the third terminal device is receiving the data.
  • the first terminal device can preferentially select the second time-frequency resource to send data to the third terminal device, which can improve signal reception quality and try to avoid reception failure.
  • the second time-frequency resource includes time-frequency resources that are not available for sending data to the third terminal device, indicating that if the first terminal device sends data to the third terminal device on the second time-frequency resource, the third terminal device is When receiving the data, the possibility of interference is relatively high, so the first terminal device may not select the second time-frequency resource to send the data to the third terminal device.
  • the first terminal device when the first terminal device selects the resource for sending data, it can not only take the interception result of the first terminal device as a consideration factor, but also take the interception result of the third terminal device as a consideration factor.
  • the selected resource takes into account both the channel condition around the first terminal device and the channel condition around the third terminal device, so as to improve the signal reception quality.
  • sending the first information to the third terminal device includes:
  • the first control information includes a first SCI and a second SCI
  • the first SCI is a first-level SCI
  • the second SCI is a second-level SCI
  • the second SCI includes the first information.
  • a terminal device When a terminal device sends sideline information, it generally sends the first-stage SCI (1st-stage SCI) and the second-stage SCI (2nd-stage SCI), and may also send data (data).
  • the terminal When sending side line information, the device can only send control information (first-level SCI and second-level SCI), or only data, or can also send first-level SCI, second-level SCI and data.
  • the first-level SCI is sent on the control channel, for example
  • the second-level SCI is sent on the data channel, for example.
  • the first-level SCI may indicate the time-frequency resources used to transmit the second-level SCI.
  • the first terminal device may send the first information included in one of the SCIs to the third terminal device.
  • the first level SCI is generally broadcast information
  • the second level SCI is generally unicast information sent to a terminal device.
  • the first information only needs to be sent to the third terminal device that is to receive the first data, and does not need to be sent to other terminal devices. Therefore, the first terminal device does not need to include the first information in the first-level SCI, but the first terminal device. Only one information is included in the second level SCI.
  • the third terminal device can receive the first information, and other terminal devices will not receive the first information, which improves the success rate of the third terminal device to receive the first information and reduces the number of other terminals. Device interference.
  • the terminal devices with an older version cannot recognize the first information, and these terminal devices cannot exclude the time-frequency resources reserved by the first terminal device, and may occupy the first terminal device.
  • the time-frequency resource to be reserved by the terminal device is generally based on the first-level SCI. Therefore, if the first information is included in the second-level SCI, it will have no effect on the terminal device with an older version, regardless of whether it is an old version of the terminal device. Both the device and the new version of the terminal device can normally perform resource exclusion, and the old version of the terminal device will not occupy these time-frequency resources because it cannot exclude the time-frequency resources reserved by the first terminal device, which can reduce the probability of resource conflicts.
  • the first information is further used to indicate a fourth time-frequency resource
  • the fourth time-frequency resource is used to determine a time-frequency resource for sending the second information.
  • the fourth time-frequency resource is the available time-frequency resource determined by the first terminal device according to the interception result.
  • the fourth time-frequency resource can be understood as a recommended resource, indicating that the first terminal device is receiving on the fourth time-frequency resource.
  • the interference from other terminal devices during data can meet the receiving conditions, that is, it does not affect the reliability of the reception, or in other words, it means that the first terminal device receives more interference from other terminal devices when receiving data on the fourth time-frequency resource. small. Therefore, the first terminal device recommends that the third terminal device use the fourth time-frequency resource to send the second information to the first terminal device.
  • the fourth time-frequency resource is an unavailable time-frequency resource determined by the first terminal device according to the interception result, indicating that interference from other terminal devices that the first terminal device receives when receiving data on the fourth time-frequency resource cannot satisfy the reception
  • the condition which will affect the achievement of the reception reliability, or in other words, indicates that the first terminal device receives greater interference from other terminal devices when receiving data on the fourth time-frequency resource.
  • the first information indicating the fourth time-frequency resource can be considered as instructing the third terminal device to not use the fourth time-frequency resource to send the second information as much as possible.
  • Indicating the fourth time-frequency resource through the first information can assist the third terminal device to determine the time-frequency resource used to send the second information as soon as possible, which can improve the efficiency of determining the time-frequency resource used to send the second information, and can also improve The reception success rate of the first terminal device for the second information.
  • the first SCI is used to indicate a fifth time-frequency resource
  • the fifth time-frequency resource is used to send the second information
  • the fifth time-frequency resource is the available time-frequency resource determined by the first terminal device according to the interception result, indicating that interference from other terminal devices when the first terminal device receives data on the fifth time-frequency resource can meet the receiving conditions, that is, The achievement of the standard that does not affect the reception reliability, or in other words, indicates that the first terminal device receives less interference from other terminal devices when receiving data on the fifth time-frequency resource. Therefore, the first terminal device instructs the third terminal device to use the fifth time-frequency resource to send the second information to the first terminal device. In this case, the third terminal device does not need to determine the time-frequency resource for sending the second information according to other factors (such as the interception result of the third terminal device, etc.), and directly determines that the fifth time-frequency resource is used for sending.
  • the time-frequency resource of the second information is sufficient. By indicating the fifth time-frequency resource, it helps to reduce the burden on the third terminal device, improve the efficiency of determining the time-frequency resource used to send the second information, and also improve the first terminal device’s success rate of receiving the second information .
  • the first SCI further includes a first field, and the first field is used to indicate that the second SCI includes the first information.
  • the first field may reuse existing fields in the first SCI, or may also be a newly added field in the first SCI.
  • the first SCI is a first-level SCI and is sent by broadcasting. If a terminal device receiving the first SCI can recognize the first field, it can be determined that the second SCI includes the first information. For example, if the third terminal device receives the first SCI and the second SCI, and can identify the first field, the third terminal device can determine that the second SCI includes the first information, and the third terminal device is analyzing the second SCI When you get the first information from it. In this way, the third terminal device can recognize the format of the second SCI, so that the first information can be obtained correctly.
  • the method further includes:
  • the first information is retransmitted to the third terminal device in a sixth time-frequency resource, and the sixth time-frequency resource is indicated by the first SCI.
  • the first information may also be sent repeatedly. If the first terminal device repeatedly sends the first information, the time-frequency resource used to repeatedly send the first information can be indicated by the first SCI, so that the third terminal device can correctly receive the repeatedly sent first information. For example, after the first terminal device sends the first information to the third terminal device on the seventh time-frequency resource, it may also retransmit the first information to the third terminal device on the sixth time-frequency resource, and the first SCI may indicate the sixth time. Frequency resources. Therefore, the third terminal device can receive the retransmitted first information from the first terminal device in the sixth time-frequency resource according to the instruction of the first SCI.
  • receiving the second information from the third terminal device includes:
  • the second control information includes a third SCI and a fourth SCI
  • the third SCI is a first-level SCI
  • the fourth SCI is a second-level SCI
  • the fourth SCI includes the second information.
  • the third terminal device does not need to include the second information in the first-level SCI, but the first terminal device.
  • the second information can be included in the second level SCI. Therefore, as an optional implementation manner for sending the second information, the third terminal device may include the second information in the second-level SCI and send it.
  • the third terminal device transmits the second control information to the first terminal device, and the first terminal device receives the second control information from the third terminal device.
  • the second control information may include a third SCI and a fourth SCI, the third SCI is the first level SCI, and the fourth SCI is the second level SCI.
  • the fourth SCI can include the second information.
  • the first terminal device can receive the second information, and other terminal devices will not receive the first information, which improves the success rate of the first terminal device to receive the first information and reduces the number of other terminals. Device interference.
  • the second information is included in the first-level SCI, terminal devices with an older version cannot recognize the second information. These terminal devices cannot exclude the time-frequency resources reserved by the first terminal device, and may occupy the first terminal device. The time-frequency resource to be reserved by the terminal device. The terminal device generally excludes time-frequency resources based on the first-level SCI.
  • the second information if it is included in the second-level SCI, it will have no effect on the terminal device with an older version, regardless of whether it is an old version of the terminal device.
  • Both the device and the new version of the terminal device can normally perform resource exclusion, and the old version of the terminal device will not occupy these time-frequency resources because it cannot exclude the time-frequency resources reserved by the first terminal device, which can reduce the probability of resource conflicts.
  • the third SCI further includes a second field, and the second field is used to indicate that the fourth SCI includes the second information.
  • the second field may reuse existing fields in the third SCI, or may also be a newly added field in the third SCI.
  • the third SCI is the first level SCI, which is sent by broadcasting. If the terminal device receiving the third SCI can recognize the second field, it can determine that the fourth SCI includes the second information. For example, the third terminal device receives the third SCI and the fourth SCI, and can identify the second field, then the third terminal device can determine that the fourth SCI includes the second information, and the third terminal device is analyzing the second SCI The second information will be obtained from it. In this way, the third terminal device can recognize the format of the fourth SCI, so that the second information can be correctly obtained.
  • the first information further includes information used to indicate the data packet size of the first data, and the data packet size of the first data is used to determine the second time frequency resource.
  • the third terminal device can also determine the second information based on the third The terminal device's listening result is determined.
  • the third terminal device performs resource exclusion based on the interception result, it can be performed based on the packet size of the first data. Therefore, the first terminal device can inform the third terminal device of the packet size information of the first data for the first time.
  • Three terminal devices perform resource exclusion.
  • the data packet size of the first data may include the size of the subchannel occupied by the first data, that is, how many subchannels the first data occupies, or the data packet size of the first data may include the transport block size corresponding to the first data, Alternatively, the data packet size of the first data may also include other information.
  • the third time-frequency resource is the second time-frequency resource
  • sending the first data to the third terminal device through the third time-frequency resource includes:
  • the first terminal device determines that the second time-frequency resource is not excluded from use based on the detection of the SCI from at least one second terminal device, that is, the second time-frequency resource is also available for the first terminal device. Resource, the first terminal device may determine to send data through the second time-frequency resource. In this case, the second time-frequency resource and the third time-frequency resource are the same time-frequency resource.
  • Detecting side control information from at least one second terminal device to determine the first time-frequency resource further includes:
  • the side-line control information from the at least one second terminal device is detected to determine a seventh time-frequency resource, where the seventh time-frequency resource is among the available time-frequency resources determined according to the detected side-line control information.
  • Sending the first information to the third terminal device includes:
  • the seventh time-frequency resource is used to send the first information to the third terminal device
  • the first terminal device must first send the first information to the third terminal device, and then receive the second information from the third terminal device before sending the first data to the third terminal device.
  • the terminal device sends data, it needs to ensure that the data is sent within the remaining packet delay budget, otherwise it will be regarded as a transmission failure. Therefore, it can be understood that, in order to ensure that the transmission of the first data is within the remaining packet delay budget, the earlier the time domain position of the seventh time-frequency resource, the better.
  • the first terminal device determines one or more available time-frequency resources according to the listening results, and the seventh time-frequency resource may be the earliest time-frequency resource in the time domain among the one or more available time-frequency resources, Alternatively, the seventh time-frequency resource may not be the earliest time-frequency resource in the time domain among the one or more available time-frequency resources, as long as t 1 ⁇ t a_1 ⁇ t 2 is satisfied, and t a_1 represents the seventh time.
  • the time domain location of the frequency resource is not be the earliest time-frequency resource in the time domain among the one or more available time-frequency resources.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device; or,
  • the second time-frequency resource includes time-frequency resources that are not available for sending data to the third terminal device.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device, indicating that if the first terminal device sends data to the third terminal device on the second time-frequency resource, the third terminal device is receiving the data.
  • the possibility of data interference is relatively small, so the first terminal device can preferentially select the second time-frequency resource to send data to the third terminal device, which can improve signal reception quality and try to avoid reception failure.
  • the second time-frequency resource includes time-frequency resources that are not available for sending data to the third terminal device, indicating that if the first terminal device sends data to the third terminal device on the second time-frequency resource, the third terminal device is When receiving the data, the possibility of interference is relatively high, so the first terminal device may not select the second time-frequency resource to send the data to the third terminal device.
  • a second communication method includes: receiving first information from a first terminal device, where the first information is used to trigger the determination of the second information; and detecting a side line from at least one fourth terminal device Control information to determine a second time-frequency resource, the at least one fourth terminal device includes the first terminal device, and the second time-frequency resource is used to determine a time-frequency resource for sending data by the first terminal device; Sending the second information to the first terminal device, where the second information is used to indicate the second time-frequency resource; and receiving the first data from the first terminal device.
  • the method may be executed by a second communication device, and the second communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip.
  • the second communication device is a terminal device, the terminal device is a terminal device, or is a chip set in the terminal device for realizing the function of the terminal device, or is other device used for realizing the function of the terminal device part.
  • the second communication device is the third terminal device.
  • receiving the first information from the first terminal device includes:
  • the second SCI includes the first information.
  • the second SCI is further used to indicate a fourth time-frequency resource, and the fourth time-frequency resource is used to determine a time-frequency resource for sending the second information.
  • the method further includes:
  • the detection of the side control information from the at least one fourth terminal device it is determined that the fourth time-frequency resource is not excluded from use, and it is determined that the second information is sent through the fourth time-frequency resource; or,
  • the fourth time-frequency resource is excluded from use. Then, when the priority of the second data is higher than the priority threshold, it is determined to pass the failure
  • the time-frequency resource excluded from use sends the second information; otherwise, it is determined to send the second information through the fourth time-frequency resource; or,
  • the fourth time-frequency resource is excluded from use, then, when the priority of the second data is higher than the priority of the first data.
  • the second data is data to be sent by the fourth terminal device that reserves the fourth time-frequency resource through the fourth time-frequency resource.
  • the third terminal device may determine to send the second information through the fourth time-frequency resource.
  • the third terminal device determines that the fourth time-frequency resource is excluded from use based on the detection of side control information from at least one fourth terminal device, that is, the fourth time-frequency resource is not available to the third terminal device If the time-frequency resource is used, the third terminal device can determine whether the priority of the second data is higher than the first priority threshold. If the priority of the second data is higher than the first priority threshold, the third terminal device can use the time-frequency resource (ie, the available time-frequency resource) determined according to the listening result of the third terminal device that is not excluded from use.
  • the time-frequency resource ie, the available time-frequency resource
  • the third terminal device may determine to send the second information through the fourth time-frequency resource .
  • the second data is data to be sent by the fourth terminal device that has reserved the fourth time-frequency resource through the fourth time-frequency resource, and the priority of the second data may be from the fourth terminal device received through the third terminal device.
  • the first level of the device is indicated by the SCI.
  • the fourth time-frequency resource is an unavailable time-frequency resource for the third terminal device, it indicates that the third terminal device determines through listening that the fourth time-frequency resource has been reserved by other terminal devices, then the second data is The other terminal device reserves the data to be transmitted by the fourth time-frequency resource.
  • the first priority threshold may be determined by the third terminal device, or determined through negotiation between the first terminal device and the third terminal device, or may be configured by a network device, or may also be specified by a protocol.
  • the third terminal device determines whether the priority of the second data is higher than the priority of the first data. If the priority of the second data is higher than the priority of the first data, the third terminal device can use the time-frequency resource (ie, the available time-frequency Resource) to select the time-frequency resource used to send the second information; or, if the priority of the second data is lower than or equal to the priority of the first data, the third terminal device may determine to send the second information through the fourth time-frequency resource Two information.
  • the time-frequency resource ie, the available time-frequency Resource
  • the fourth time-frequency resource may also be a time-frequency resource considered unavailable by the first terminal device, that is, the first terminal device instructs the third terminal device to try not to use the fourth time-frequency resource to send the second information. If this is the case, when the third terminal device determines the time-frequency resource for sending the second information, if it is determined that the fourth time-frequency resource is excluded from use according to the detection of the SCI from at least one fourth terminal device, Then the third terminal device may select the time-frequency resource for sending the second information from the time-frequency resources (that is, the available time-frequency resources) that are not excluded from use determined according to the listening result of the third terminal device; and If it is determined that the fourth time-frequency resource is not excluded from use according to the detection of the side control information from at least one fourth terminal device, the third terminal device can obtain the result of the interception from the third terminal device. The time-frequency resource for sending the second information is selected from the used time-frequency resources (that is, the available time-frequency resources), and the fourth time-frequency resource is not selected
  • the first SCI is used to indicate a fifth time-frequency resource
  • the fifth time-frequency resource is used to send the second information
  • the method further includes: determining to send the second information through the fifth time-frequency resource.
  • the first SCI further includes a first field, and the first field is used to indicate that the second SCI includes the first information.
  • the method further includes: receiving the retransmitted first information from the first terminal device in a sixth time-frequency resource, where the sixth time-frequency resource is allocated by the The first SCI instruction.
  • sending the second information to the first terminal device includes:
  • the second control information includes a third SCI and a fourth SCI
  • the third SCI is a first level SCI
  • the fourth SCI is a second level SCI
  • the fourth SCI includes the second information.
  • the third SCI further includes a second field, and the second field is used to indicate that the fourth SCI includes the second information.
  • the first information further includes information for indicating the packet size of the first data, and side control information from at least one first terminal device is detected to determine the second Time-frequency resources, including:
  • the second time-frequency resource is determined according to the detection result and the data packet size of the first data.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device; or,
  • the second time-frequency resource includes time-frequency resources that are not available for sending data to the third terminal device.
  • receiving the first data from the first terminal device includes:
  • the first data from the first terminal device is received through a third time-frequency resource, where the third time-frequency resource is determined according to the first time-frequency resource and the second time-frequency resource, and the first time-frequency resource is The frequency resource is determined by the first terminal device detecting side control information from at least one second terminal device.
  • a communication device is provided, for example, the communication device is the first communication device as described above.
  • the first communication device is configured to execute the method in the foregoing first aspect or any possible implementation manner.
  • the first communication device may include a module for executing the method in the first aspect or any possible implementation manner, for example, including a processing module and a transceiver module.
  • the transceiver module may include a sending module and a receiving module.
  • the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions.
  • the first communication device is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a terminal device.
  • the first terminal device may be a terminal device, or may be a chip or other component provided in the terminal device.
  • the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor.
  • the sending module may be implemented by a transmitter
  • the receiving module may be implemented by a receiver.
  • the transmitter and the receiver may be different functional modules, or may be the same functional module, but can implement different functions.
  • the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device.
  • the transceiver (or transmitter and receiver) is, for example, a communication interface in the chip, and the communication interface is connected to the radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.
  • the first communication device is the first terminal device, and the processing module and the transceiver module are used as examples for the introduction. in,
  • the processing module is configured to detect side control information from at least one second terminal device to determine a first time-frequency resource, the at least one second terminal device includes a third terminal device, and the first time-frequency resource Including time-frequency resources that are not available for sending data to the third terminal device;
  • the transceiver module is configured to send first information to the third terminal device, where the first information is used to trigger the determination of the second information;
  • the transceiver module is further configured to receive the second information from the third terminal device, where the second information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to determine the direction to the third terminal device.
  • the time-frequency resource of the data sent by the terminal device is further configured to receive the second information from the third terminal device, where the second information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to determine the direction to the third terminal device.
  • the processing module is further configured to determine a third time-frequency resource according to the first time-frequency resource and the second time-frequency resource;
  • the transceiver module is further configured to send first data to the third terminal device through the third time-frequency resource.
  • the transceiver module is configured to send the first information to the third terminal device in the following manner:
  • the first control information includes a first SCI and a second SCI
  • the first SCI is a first-level SCI
  • the second SCI is a second-level SCI
  • the second SCI includes the first information.
  • the first information is further used to indicate a fourth time-frequency resource
  • the fourth time-frequency resource is used to determine a time-frequency resource for sending the second information.
  • the first SCI is used to indicate a fifth time-frequency resource
  • the fifth time-frequency resource is used to send the second information
  • the first SCI further includes a first field, and the first field is used to indicate that the second SCI includes the first information.
  • the transceiver module is further configured to retransmit the first information to the third terminal device in a sixth time-frequency resource, and the sixth time-frequency resource is allocated by the first information An SCI instruction.
  • the transceiver module is configured to receive the second information from the third terminal device in the following manner:
  • the second control information includes a third SCI and a fourth SCI
  • the third SCI is a first-level SCI
  • the fourth SCI is a second-level SCI
  • the fourth SCI includes the second information.
  • the third SCI further includes a second field, and the second field is used to indicate that the fourth SCI includes the second information.
  • the first information further includes information used to indicate the data packet size of the first data, and the data packet size of the first data is used to determine the second time frequency resource.
  • the third time-frequency resource is the second time-frequency resource
  • the transceiving module is configured to communicate to the third terminal device through the third time-frequency resource in the following manner Send the first data:
  • the processing module is used to detect side-line control information from at least one second terminal device to determine the first time-frequency resource, and is also used to detect side-line control information from the at least one second terminal device to determine the first time-frequency resource. Seven time-frequency resources, where the seventh time-frequency resource is the earliest time-frequency resource in the time domain among the available time-frequency resources determined according to the detected side-line control information;
  • the transceiver module is configured to send first information to the third terminal device in the following manner: send the first information to the third terminal device through the seventh time-frequency resource.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device; or,
  • the second time-frequency resource includes time-frequency resources that are not available for sending data to the third terminal device.
  • a communication device is provided, for example, the communication device is the second communication device as described above.
  • the second communication device is used to execute the method in the above-mentioned second aspect or any possible implementation manner.
  • the second communication device may include a module for executing the method in the second aspect or any possible implementation manner, for example, including a processing module and a transceiver module.
  • the transceiver module may include a sending module and a receiving module.
  • the sending module and the receiving module may be different functional modules, or may be the same functional module, but can implement different functions.
  • the second communication device is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a terminal device.
  • the first terminal device may be a terminal device, or may be a chip or other component provided in the terminal device.
  • the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor.
  • the sending module may be implemented by a transmitter
  • the receiving module may be implemented by a receiver.
  • the transmitter and the receiver may be different functional modules, or may be the same functional module, but can implement different functions.
  • the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device.
  • the transceiver (or, transmitter and receiver) is, for example, a communication interface in the chip, and the communication interface is connected to a radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.
  • the second communication device is the third terminal device, and the processing module and the transceiving module are used as examples for the introduction. in,
  • the transceiver module is configured to receive first information from a first terminal device, where the first information is used to trigger the determination of second information;
  • the processing module is configured to detect side control information from at least one fourth terminal device to determine a second time-frequency resource, the at least one fourth terminal device includes the first terminal device, and the second time
  • the frequency resource is used to determine the time-frequency resource for sending data by the first terminal device
  • the transceiver module is further configured to send the second information to the first terminal device, where the second information is used to indicate the second time-frequency resource;
  • the transceiver module is also used to receive first data from the first terminal device.
  • the transceiver module is configured to receive the first information from the first terminal device in the following manner:
  • the second SCI includes the first information.
  • the first information is further used to indicate a fourth time-frequency resource
  • the fourth time-frequency resource is used to determine a time-frequency resource for sending the second information.
  • processing module is further configured to:
  • the detection of the side control information from the at least one fourth terminal device it is determined that the fourth time-frequency resource is not excluded from use, and it is determined that the second information is sent through the fourth time-frequency resource; or,
  • the fourth time-frequency resource is excluded from use. Then, when the priority of the second data is higher than the priority threshold, it is determined to pass the failure
  • the time-frequency resource excluded from use sends the second information; otherwise, it is determined to send the second information through the fourth time-frequency resource; or,
  • the fourth time-frequency resource is excluded from use, then, when the priority of the second data is higher than the priority of the first data.
  • the second data is data to be sent by the fourth terminal device that reserves the fourth time-frequency resource through the fourth time-frequency resource.
  • the first SCI is used to indicate a fifth time-frequency resource
  • the fifth time-frequency resource is used to send the second information
  • the processing module is further configured to determine to send the second information through the fifth time-frequency resource.
  • the first SCI further includes a first field, and the first field is used to indicate that the second SCI includes the first information.
  • the transceiver module is further configured to receive the retransmitted first information from the first terminal device in a sixth time-frequency resource, where the sixth time-frequency resource is determined by The first SCI instruction.
  • the transceiver module is configured to send the second information to the first terminal device in the following manner:
  • the second control information includes a third SCI and a fourth SCI
  • the third SCI is a first level SCI
  • the fourth SCI is a second level SCI
  • the fourth SCI includes the second information.
  • the third SCI further includes a second field, and the second field is used to indicate that the fourth SCI includes the second information.
  • the first information further includes information used to indicate the size of the data packet of the first data
  • the processing module is configured to detect data from at least one first terminal device in the following manner Side line control information to determine the second time-frequency resource:
  • the second time-frequency resource is determined according to the detection result and the data packet size of the first data.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device; or,
  • the second time-frequency resource includes time-frequency resources that are not available for sending data to the third terminal device.
  • the transceiver module is configured to receive the first data from the first terminal device in the following manner:
  • the first data from the first terminal device is received through a third time-frequency resource, where the third time-frequency resource is determined according to the first time-frequency resource and the second time-frequency resource, and the first time-frequency resource is The frequency resource is determined by the first terminal device detecting side control information from at least one second terminal device.
  • a communication device is provided.
  • the communication device is, for example, the first communication device as described above.
  • the communication device includes a processor and a communication interface, and the communication interface can be used to communicate with other devices or equipment.
  • it may also include a memory for storing computer instructions.
  • the processor and the memory are coupled with each other, and are used to implement the methods described in the first aspect or various possible implementation manners.
  • the first communication device may not include a memory, and the memory may be located outside the first communication device.
  • the processor, the memory, and the communication interface are coupled with each other, and are used to implement the methods described in the first aspect or various possible implementation manners.
  • the first communication device when the processor executes the computer instructions stored in the memory, the first communication device is caused to execute the method in the foregoing first aspect or any one of the possible implementation manners.
  • the first communication device is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a terminal device.
  • the first communication device is a first terminal device, and the first terminal device is a terminal device, or a chip or other component provided in the terminal device.
  • the communication interface is realized by a transceiver (or a transmitter and a receiver) in the communication device, for example, the transceiver is realized by an antenna, a feeder and a receiver in the communication device. Codec and other implementations.
  • the communication interface is, for example, an input/output interface of the chip, such as input/output pins, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.
  • a communication device is provided.
  • the communication device is, for example, the second communication device as described above.
  • the communication device includes a processor and a communication interface, and the communication interface can be used to communicate with other devices or equipment.
  • it may also include a memory for storing computer instructions.
  • the processor and the memory are coupled with each other, and are used to implement the methods described in the second aspect or various possible implementation manners.
  • the second communication device may not include a memory, and the memory may be located outside the second communication device.
  • the processor, the memory, and the communication interface are coupled with each other, and are used to implement the methods described in the second aspect or various possible implementation manners.
  • the second communication device when the processor executes the computer instructions stored in the memory, the second communication device is caused to execute the method in the second aspect or any one of the possible implementation manners.
  • the second communication device is a communication device, or a chip or other component provided in the communication device.
  • the communication device is a terminal device.
  • the second communication device is a third terminal device, and the third terminal device is a terminal device, or a chip or other component provided in the terminal device.
  • the communication interface is realized by, for example, a transceiver (or transmitter and receiver) in the communication device.
  • the transceiver is realized by the antenna, feeder, and Codec and other implementations.
  • the communication interface is, for example, an input/output interface of the chip, such as an input/output pin, etc., and the communication interface is connected to a radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components.
  • a chip in a seventh aspect, includes a processor and a communication interface, the processor is coupled with the communication interface, and is configured to implement the method provided in the first aspect or any of the optional implementation manners above .
  • the chip may also include a memory.
  • the processor may read and execute a software program stored in the memory to implement the above-mentioned first aspect or any one of the optional implementation manners. method.
  • the memory may not be included in the chip, but located outside the chip, which is equivalent to that the processor can read and execute the software program stored in the external memory to implement the first aspect or Any of the methods provided by the alternative implementations.
  • a chip in an eighth aspect, includes a processor and a communication interface.
  • the processor is coupled to the communication interface and configured to implement the method provided in the second aspect or any of the optional implementation manners. .
  • the chip may also include a memory.
  • the processor may read and execute a software program stored in the memory to implement the above-mentioned second aspect or any one of the optional implementation manners. method.
  • the memory may not be included in the chip, but located outside the chip, which is equivalent to that the processor can read and execute the software program stored in the external memory to implement the second aspect or Any of the methods provided by the alternative implementations.
  • a first communication system includes the communication device described in the third aspect, the communication device described in the fifth aspect, or the communication device described in the seventh aspect.
  • a second communication system includes the communication device described in the fourth aspect, the communication device described in the sixth aspect, or the communication device described in the eighth aspect.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer executes the first aspect or any one of the above. The method described in one possible implementation.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and when the computer program runs on a computer, the computer executes the second aspect or any one of the above.
  • a computer program product containing instructions is provided.
  • the computer program product is used to store a computer program.
  • the computer program runs on a computer, the computer executes the first aspect or any one of the above. The method described in one possible implementation.
  • a computer program product containing instructions is provided.
  • the computer program product is used to store a computer program.
  • the computer program runs on a computer, the computer executes the second aspect or any one of the above. The method described in one possible implementation.
  • the first terminal device when the first terminal device selects the resource for sending data, it may not only take the interception result of the first terminal device as a consideration factor, but also take the interception result of the third terminal device as a consideration factor, so that The selected resource not only considers the channel conditions around the first terminal device, but also considers the channel conditions around the third terminal device, so as to improve the signal reception quality.
  • FIG. 1 is a schematic diagram of several application scenarios of V2X
  • Figure 2 is a schematic diagram of a resource listening window and a resource selection window when the terminal device performs resource selection
  • FIG. 3 is a schematic diagram of a receiving end device that does not consider the situation of the receiving end terminal device when sending data, which results in reception failure;
  • FIG. 4 is a schematic diagram of excessive resource exclusion caused by the sending end terminal device ignoring the situation of the receiving end terminal device when sending data;
  • FIG. 5 is a schematic diagram of an application scenario of an embodiment of the application.
  • FIG. 6 is a flowchart of a communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of repeatedly sending first information in an embodiment of the application.
  • FIG. 8 is a schematic diagram of the time-frequency resource for sending the second information through the first-level SCI in an embodiment of the application
  • FIG. 9 is a schematic diagram of the time slot where the time-frequency resource used to send the second information in an embodiment of the application needs to be before the time slot n+t 2;
  • FIG. 10 is a schematic diagram of a first terminal device sending first data to a third terminal device in an embodiment of the application
  • FIG. 11 is a schematic block diagram of a first terminal device according to an embodiment of this application.
  • FIG. 12 is a schematic block diagram of a third terminal device according to an embodiment of this application.
  • FIG. 13 is a schematic block diagram of a communication device provided by an embodiment of this application.
  • FIG. 14 is another schematic block diagram of a communication device provided by an embodiment of this application.
  • FIG. 15 is still another schematic block diagram of the communication device provided by an embodiment of the application.
  • a terminal device for example, a terminal device, or a module for realizing the functions of the terminal device, such as a chip system, which can be set in the terminal device.
  • Terminal devices include devices that provide users with voice and/or data connectivity. Specifically, they include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity. . For example, it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, light UE, subscriber unit ( subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), User terminal (user terminal), user agent (user agent), or user equipment (user device), etc.
  • UE user equipment
  • M2M/MTC Machine-to-machine/machine-type communications
  • IoT Internet of things
  • it may include mobile phones (or “cellular” phones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, mobile devices with built-in computers, and so on.
  • PCS personal communication service
  • PCS cordless phones
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • restricted devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing devices.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanners and other information sensing devices.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various terminal devices described above if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be regarded as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ).
  • OBU on-board unit
  • the terminal device may also include a relay. Or it can be understood that everything that can communicate with the base station can be regarded as a terminal device.
  • the device used to implement the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system, and the device may be installed in the terminal device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device used to implement the functions of the terminal is a terminal device as an example to describe the technical solutions provided in the embodiments of the present application.
  • Network equipment including, for example, access network (AN) equipment, such as a base station (e.g., access point), which may refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network
  • AN access network
  • a base station e.g., access point
  • V2X vehicle-to-everything
  • the base station can be used to convert the received air frame and IP packet to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network can include the IP network.
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment may include the next generation node B (gNB) in the new radio (NR) system (also referred to as the NR system) of the fifth generation mobile communication technology (the 5th generation, 5G), Or, it may also include a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (Cloud RAN) system, which is not limited in the embodiment of the present application.
  • gNB next generation node B
  • NR new radio
  • 5G fifth generation
  • CU centralized unit
  • DU distributed unit
  • Cloud RAN cloud radio access network
  • the network equipment may also include core network equipment.
  • the core network equipment includes, for example, access and mobility management functions (AMF) or user plane functions (UPF).
  • AMF access and mobility management functions
  • UPF user plane functions
  • the network equipment mentioned refers to the access network equipment.
  • the device used to implement the function of the network device may be a network device, or a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device.
  • the device used to implement the functions of the network equipment is a network device as an example to describe the technical solutions provided in the embodiments of the present application.
  • V2X is the interconnection between vehicles and the outside world. This is the foundation and key technology of future smart cars, autonomous driving, and smart transportation systems. V2X will optimize the specific application requirements of V2X based on the existing device-to-device (D2D) technology. It is necessary to further reduce the access delay of V2X devices and solve the problem of resource conflicts.
  • D2D device-to-device
  • V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and There are several application requirements such as vehicle-to-network (V2N) communication and interaction.
  • V2V refers to the communication between vehicles
  • V2P refers to the communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers)
  • V2I refers to the communication between vehicles and network equipment, such as RSU
  • V2N refers to the communication between the vehicle and the base station/network.
  • V2P can be used as a safety warning for pedestrians or non-motorized vehicles on the road.
  • vehicles can communicate with roads and even other infrastructure, such as traffic lights, roadblocks, etc., to obtain road management information such as traffic light signal timing.
  • V2V can be used for information interaction and reminding between vehicles, and the most typical application is for the anti-collision safety system between vehicles.
  • V2N is currently the most widely used form of Internet of Vehicles. Its main function is to enable vehicles to connect to a cloud server through a mobile network, and use the navigation, entertainment, or anti-theft application functions provided by the cloud server.
  • V2X it is mainly the communication between terminal equipment and terminal equipment.
  • the current standard protocol supports broadcast, multicast, and unicast.
  • the broadcast mode means that the terminal device as the sender uses the broadcast mode to send data, and multiple terminal device ends can receive sidelink control information (SCI) or sidelink sharing from the sender Channel (sidelink shared channel, SSCH).
  • SCI sidelink control information
  • SSCH sidelink shared channel
  • the way to ensure that all terminal devices parse the control information from the sender is that the sender does not scramble the control information, or the sender uses a scrambling code known to all terminal devices to add to the control information. Disturb.
  • the multicast mode is similar to broadcast transmission.
  • the terminal equipment as the transmitting end uses the broadcast mode for data transmission, and a group of terminal equipment can parse SCI or SSCH.
  • the unicast mode is that one terminal device sends data to another terminal device, and other terminal devices do not need or cannot parse the data.
  • At least one means one or more, and “plurality” means two or more.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • "The following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • the ordinal numbers such as “first” and “second” mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects. , Priority or importance, etc.
  • the second time-frequency resource and the first time-frequency resource are only for distinguishing different time-frequency resources, but do not indicate the difference in size, priority, or importance of the two time-frequency resources.
  • D2D technology can lighten the burden of cellular networks, reduce battery power consumption of user equipment, increase data rates, and meet the needs of proximity services.
  • D2D technology allows multiple terminal devices that support D2D functions to directly discover and communicate directly with or without network infrastructure.
  • an application scenario for the Internet of Vehicles based on the D2D technology has been proposed. However, due to security considerations, the delay requirements in this scenario are very high, and the existing D2D technology cannot be implemented.
  • V2X communication refers to the communication between the vehicle and anything outside, including V2V, V2P, V2I, and V2N. Refer to Figure 1.
  • V2X communication is aimed at high-speed devices represented by vehicles. It is the basic technology and key technology applied in scenarios with very high communication delay requirements in the future, such as smart cars, autonomous driving, intelligent transportation systems and other scenarios.
  • LTE V2X communication can support communication scenarios with and without network coverage, and its resource allocation method can adopt the mode of network equipment scheduling, such as the E-UTRAN Node B (eNB) scheduling mode and UE optional mode.
  • eNB E-UTRAN Node B
  • UE optional mode UE optional mode.
  • vehicle user equipment Vehicle UE, V-UE
  • V-UE can periodically or pass some non-periodical information such as position information, speed information, or intent information (turning, merging, and reversing).
  • the trigger of the event is sent to the surrounding V-UEs, and the V-UE will also receive the information of other surrounding V-UEs in real time.
  • LTE-V2X Long term evolution (LTE)-V2X solves some of the basic requirements in V2X scenarios, but for future application scenarios such as fully intelligent driving and autonomous driving, LTE-V2X cannot effectively support it. Therefore, 5G NR technology has further developed V2X. NR-V2X can support lower transmission delay, more reliable communication transmission, higher throughput, better user experience, and meet the needs of a wider range of application scenarios.
  • the terminal device as the transmitting end (also called the transmitting end terminal device) sends SCI and sideline data to the terminal device as the receiving end (also called the receiving end terminal device) in a time slot, and the receiving end terminal The device receives and decodes the side line data by receiving SCI.
  • the resource allocation modes there are two resource allocation modes for the transmitting end terminal equipment.
  • One of the resource allocation modes is mode 1 (mode-1).
  • mode-1 the base station allocates resources for the transmitting end terminal equipment; the other is mode-1.
  • One resource allocation mode is mode-2, in which the sending end terminal device selects resources by itself.
  • mode-1 is mainly applied to V2X communication in the case of network coverage, and the base station performs resource allocation.
  • mode-1 may include dynamic scheduling (dynamic grant, DG) mode and pre-configured scheduling (configured grant, CG) mode.
  • DCI downlink control information
  • CG configured grant
  • the base station will schedule the transmitting end terminal device to send sideline data to the receiving end terminal device through downlink control information (DCI).
  • DCI downlink control information
  • CG mode of mode-1 the base station will configure related side-line time-frequency resources through high-level signaling, such as radio resource control (Radio Resource Control, RRC) signaling.
  • the CG mode includes CG type 1 (CG type 1) and CG type 2 (CG type 2).
  • the first type of CG means that the transmitting terminal device directly sends sideline data on the sideline time-frequency resources configured by the base station;
  • the second type of CG means that the base station will send DCI to activate the side-line time-frequency resources configured by the base station, and the transmitting end terminal device will send the side-line data on the side-line time-frequency resources configured by the base station after receiving the DCI.
  • mode-2 the selection of the side-line time-frequency resources of the transmitting end terminal device does not depend on the base station. This mode is not limited to network coverage. In the absence of network coverage, the sending end terminal device can also use this mode to communicate.
  • the sending end terminal device triggers resource selection in time slot n , and obtains the listening result in the resource listening window [nt 0 , nt proc, 0 ) defined by the time slot range.
  • t proc,0 is the time for the sender terminal device to process the listening result. The value of t proc,0 will vary depending on the capabilities of the terminal device, t proc,0 ⁇ 0.
  • the sending end terminal device excludes unavailable time-frequency resources in the resource selection window [n+t 1 ,n+t 2 ] defined by the time slot range, and then the sending end terminal device obtains available The time-frequency resource of the side line data is sent.
  • 0 ⁇ t 1 ⁇ t proc,1 , t proc,1 is the time for the terminal device to process the listening result.
  • the value is different according to the different capabilities of the terminal device, and the value of t proc,1 will change according to the different capabilities of the terminal device. It's different.
  • PDB is the maximum delay time required for a data packet from being generated in the business layer to being successfully sent.
  • the remaining PDB is the remaining delay time from when the data packet is generated from the service layer to time n.
  • the unit of the PDB can be a time slot, a subframe or a frame, or it can also be an absolute time, for example, the unit is milliseconds or seconds.
  • the specific resource selection method of the sender terminal device is introduced as follows:
  • the sender terminal device receives the SCI from other terminal devices in the resource pool in the resource listening window [nt 0 , nt proc, 0 ), and the SCI contains the listening information of the other terminal devices. Further, the SCI is a first-stage SCI (1st-stage SCI), which is sent on a physical sidelink control channel (PSCCH).
  • PSCCH physical sidelink control channel
  • one SCI can schedule 3 transmissions.
  • the first transmission among these 3 transmissions is the initial transmission, and the last two transmissions are retransmissions, or all the 3 transmissions are retransmissions.
  • the interception information included in the SCI includes time-frequency resource information of the second and third retransmitted scheduling data, periodic time-frequency resource information that reflects the data service cycle, and data priority information (priority of PSSCH), etc. . It is understandable that at a given moment, a terminal device sends an SCI to reserve resources (including time-frequency resources) after that moment for data retransmission and new periodic data transmission.
  • the sending end terminal device learns from the received SCI listening information from the terminal device 1, the time-frequency resource reserved by the terminal device 1 is located in the resource selection window of the sending end terminal device [n+t 1 ,n+ t 2 ], the transmitting terminal device measures the data or the demodulation reference signal (DMRS) of the control channel that the terminal device 1 needs to transmit on the time-frequency resource according to the interception information, and obtains a reference Signal received power (reference signal received power, RSRP). If the RSRP is greater than the preset RSRP threshold Th RSRP , the sending end terminal device excludes the time-frequency resource from the resource selection window.
  • DMRS demodulation reference signal
  • the transmitting terminal terminal device may determine the available time-frequency resources among the resources remaining in the resource selection window. Therefore, the sending end terminal device selects time-frequency resources from the available time-frequency resources to send data.
  • the time-frequency resource used by the sending end terminal device when sending data is selected based on the listening result of the sending end terminal device in the resource listening window [nt 0 , nt proc, 0 ).
  • the interception result refers to the result determined through the above three steps 1, 2, and 3.
  • the transmitting end terminal device does not know the channel conditions around the receiving end terminal device. If there are other terminal devices communicating around the receiving end terminal device, but the sending end terminal device does not hear it, then for the receiving end terminal device, when it receives data from the sending end terminal device, it may be affected by other terminal devices.
  • the strong interference caused by the side-line communication of the terminal device causes poor signal reception quality of the terminal device at the receiving end, and may even fail to receive.
  • UE1 selects time-frequency resources to send data to UE2 according to the listening result of UE1. Since the distance between UE3 and UE4 and UE1 is relatively long, when UE1 is listening, it will be considered that there is no other terminal device around UE1 for sideline communication, and UE1 sends data to UE2. But in fact, UE3 is sending data to UE4. Since UE3 and UE2 are relatively close, UE3 sending data to UE4 causes strong interference for UE2 to receive data from UE1, causing UE2 to fail to correctly decode the data from UE1.
  • UE1 listens and can listen to UE3 sending data to UE4.
  • the RSRP measured by the UE1 is higher than the preset RSRP threshold Th RSRP , and the UE1 considers that it cannot send data to the UE2 through the time-frequency resource used by the UE3, and considers the time-frequency resource to be an unusable time-frequency resource.
  • Th RSRP the preset RSRP threshold
  • the first terminal device as the data sending end can send the first information to the third terminal device, so that the third terminal device can send the second information to the first terminal device, and the second information can include the second information.
  • the time-frequency resource the first terminal device may use the second time-frequency resource as a reference factor when selecting the time-frequency resource.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device, indicating that if the first terminal device sends data to the third terminal device on the second time-frequency resource, the third terminal device is receiving the data.
  • the first terminal device can preferentially select the second time-frequency resource to send data to the third terminal device, which can improve signal reception quality and try to avoid reception failure.
  • the second time-frequency resource includes time-frequency resources that are not available for sending data to the third terminal device, indicating that if the first terminal device sends data to the third terminal device on the second time-frequency resource, the third terminal device is When receiving the data, the possibility of interference is relatively high, so the first terminal device may not select the second time-frequency resource to send the data to the third terminal device.
  • the first terminal device when the first terminal device selects the resource for sending data, it can not only take the interception result of the first terminal device as a consideration factor, but also take the interception result of the third terminal device as a consideration factor.
  • the selected resource takes into account both the channel condition around the first terminal device and the channel condition around the third terminal device, so as to improve the signal reception quality.
  • the technical solutions provided by the embodiments of this application can be applied to D2D scenes, such as NR-D2D scenes, etc., or can be applied to V2X scenes, such as NR-V2X scenes, etc., for example, can be applied to the Internet of Vehicles, such as V2X, V2V, etc., or available In the fields of intelligent driving, assisted driving, or intelligent networked vehicles. Or it can also be applied to other scenarios or other communication systems, for example, it can also be used for resource selection of the Uu interface of the NR system or the next-generation mobile communication system, which is not specifically limited.
  • FIG. 5 is a network architecture applied in the embodiment of this application.
  • Figure 5 includes a network device and two terminal devices, terminal device 1 and terminal device 2, respectively. Both of the two terminal devices may be within the coverage area of the network device; or for the two terminal devices, only the terminal device 1 may be within the coverage area of the network device, and the terminal device 2 may not be within the coverage area of the network device; Or neither of the two terminal devices is within the coverage of the network device.
  • the two terminal devices can communicate through sidelink.
  • FIG. 5 takes the terminal device 1 in the coverage area of the network device and the terminal device 2 not in the coverage area of the network device as an example. Of course, the number of terminal devices in FIG. 5 is only an example. In practical applications, a network device can provide services for multiple terminal devices.
  • the network device in FIG. 5 is, for example, an access network device, such as a base station.
  • the access network equipment corresponds to different equipment in different systems.
  • a 5G system it corresponds to an access network equipment in 5G, such as gNB, or is an access network equipment in a subsequent evolved communication system.
  • the terminal device in FIG. 5 is a vehicle-mounted terminal device or a car as an example, but the terminal device in the embodiment of the present application is not limited to this.
  • FIG. 6 is a flowchart of the method.
  • the application of this method to the network architecture shown in FIG. 5 is taken as an example.
  • the method executed by the first terminal device and the third terminal device is taken as an example. Because this embodiment is applied to the network architecture shown in FIG. 5 as an example, the first terminal device described below may be the terminal device 1 in the network architecture shown in FIG. 5, or may be set in the terminal device 1 The chip system in the device 1; the third terminal device described below may be the terminal device 2 in the network architecture shown in FIG. 5, or may be a chip system set in the terminal device 2.
  • the first terminal device detects (or is referred to as intercepting) side-line control information from at least one second terminal device to determine the first time-frequency resource.
  • network equipment configures the terminal devices in the cell through system information block (SIB), cell-specific RRC signaling, or user-specific RRC signaling.
  • SIB system information block
  • RRC Radio Resource Control
  • SL resource pool information In a non-network coverage area, the terminal device uses the SL resource pool information pre-configured when the device leaves the factory to select time-frequency resources.
  • the SL resource pool information is used to indicate the SL resource pool.
  • the terminal device selects time-frequency resources in the SL resource pool to perform SL communication with other terminal devices, and the communication process includes one or more of unicast communication, multicast communication, or broadcast communication. In the time domain of the SL resource pool, it includes one or more time units.
  • a time unit can be a symbol, several symbols, a time slot, or a subframe.
  • One or more time units included in the time domain of an SL resource pool may be continuous in physical time or discrete.
  • the frequency domain of the SL resource pool it includes one or more frequency domain units.
  • a frequency domain unit may be a resource block (resource block, RB), several RBs, or a subchannel (subchannel), etc.
  • the subchannel may include one or more RBs.
  • the first terminal device wants to send data to the third terminal device. For example, if the data is the first data, the first terminal device listens in time slot n; or, the first terminal device wants to send control to the third terminal device. Information, the first terminal device listens in time slot n; or, if the first terminal device wants to send control information and data to the third terminal device, the first terminal device listens in time slot n to select resources.
  • the embodiment of the present application takes as an example that the first terminal device wants to send the first data to the third terminal device, but what is actually sent may be control information and/or data.
  • at least one second terminal device may include a third terminal device, and at least one second terminal device may include a third terminal device to emphasize other terminal devices. Therefore, the third terminal device may not be included here.
  • the first terminal device listens in time slot n, that is, the first terminal device detects SCI from at least one second terminal device in time slot n. According to the listening result of listening in the listening window [nt 0 ,nt proc,0 ) defined by the time slot range, the first terminal device selects the resource selection window [n+t 1 ,n] defined by the time slot range. +t 2 ], select the available time-frequency resources.
  • the resource selection window [n+t 1 ,n] defined by the time slot range. +t 2 ]
  • the first terminal device when the first terminal device performs resource exclusion, it can exclude time-frequency resources reserved by other terminal devices for sending data, or exclude time-frequency resources reserved by other terminal devices for sending control information, or exclude time-frequency resources reserved by other terminal devices for sending control information.
  • the third terminal device before the first terminal device sends data, the third terminal device may be triggered to perform the resource assistance process. Therefore, the first terminal device may first send data to the third terminal device before sending data to the third terminal device.
  • the terminal device sends the first information to trigger the third terminal device to send the second information to the first terminal device.
  • the first terminal device may select the available seventh time-frequency resource according to the listening result, so that the first information may be sent to the third terminal device through the seventh time-frequency resource.
  • the time domain position of the seventh time-frequency resource is n+t a_1 , where t 1 ⁇ t a_1 ⁇ t 2 .
  • the first terminal device must first send the first information to the third terminal device, and then receive the second information from the third terminal device, before it can send the first data to the third terminal device, that is, t a_1 at the moment when the first data is sent Previously, and currently it is stipulated that when one terminal device sends data to another terminal device, it is necessary to ensure that the data is sent within the remaining packet delay budget, otherwise it will be regarded as a transmission failure. Therefore, it is understandable that in order to ensure that the transmission of the first data is within the remaining packet delay budget, the smaller ta_1 is, the better.
  • the first terminal device determines one or more available time-frequency resources according to the listening results, and the seventh time-frequency resource may be the earliest time-frequency resource in the time domain among the one or more available time-frequency resources, Alternatively, the seventh time-frequency resource may not be the earliest time-frequency resource in the time domain among the one or more available time-frequency resources, as long as t 1 ⁇ t a_1 ⁇ t 2 is satisfied.
  • the first terminal device may only determine the time-frequency resource used to send data to the third terminal device based on the second information of the third terminal device, or the first terminal device may also determine the time-frequency resource used to transmit data to the third terminal device based on the listening result of the first terminal device and The second information of the third terminal device determines the time-frequency resource used to send data to the third terminal device.
  • the first terminal device may also determine The first time-frequency resource, the first time-frequency resource may include a time-frequency resource that is not available for sending data to the third terminal device, or may include a time-frequency resource that can be used for sending data to the third terminal device. Therefore, the first terminal device can subsequently determine the time-frequency resource used to send data to the third terminal device according to the first time-frequency resource and the second information.
  • the first terminal device sends the first information to the third terminal device, and the third terminal device receives the first information from the first terminal device.
  • the first information is used to trigger the determination of the second information, where the first information can be used as trigger information to trigger the third terminal device to determine the second information. Therefore, the first information can also be called trigger information, or called request information, etc., and there is no restriction on the name of the information.
  • the second information may be used by the first terminal device to determine the time-frequency resource for sending data to the third terminal device.
  • the third terminal device before the first terminal device sends data to the third terminal device, the third terminal device may be triggered to perform the resource assistance process, and then the third terminal device may be selected to send data to the third terminal device according to the second information fed back by the third terminal device.
  • the time-frequency resource for the terminal device to transmit data In order to obtain the second information from the third terminal device, the first terminal device may first send the first information to the third terminal device to trigger the third terminal device to determine the second information.
  • the first terminal device selects the seventh time-frequency resource to send the first information, then in S62, the first terminal device can send the first information to the third terminal device through the seventh time-frequency resource.
  • the three terminal devices may also receive the first information from the first terminal device in the seventh time-frequency resource.
  • a terminal device When a terminal device sends sideline information, it generally sends the first-stage SCI (1st-stage SCI) and the second-stage SCI (2nd-stage SCI), and may also send data (data).
  • the terminal When sending side line information, the device can only send control information (first-level SCI and second-level SCI), or only data, or can also send first-level SCI, second-level SCI and data.
  • the first-level SCI is sent on the control channel, for example
  • the second-level SCI is sent on the data channel, for example.
  • the first-level SCI is used to schedule the second-level SCI and the data.
  • the second-level SCI is also used to schedule the data.
  • the second-level SCI includes at least a source address (source ID), the control channel is, for example, a physical sidelink control channel (PSCCH), and the data channel is, for example, a physical sidelink. Shared channel (physical sidelink shared channel, PSSCH).
  • the first-level SCI may indicate the time-frequency resources used to transmit the second-level SCI, including information indicating the code rate used to determine the second-level SCI. Then, the first terminal device may send the first information included in one of the SCIs to the third terminal device.
  • the first-level SCI is generally broadcast information, and all terminal devices need to receive and decode the first-level SCI.
  • the first level SCI includes control information for line interception and user autonomous resource selection, such as time-frequency resource information, priority information, or One or more of information such as periodic time-frequency resource information that reflects the data service cycle.
  • the second-level SCI can have different formats, for example, it contains different control information fields for different transmissions, such as multicast based on geographic location.
  • the control information required for terminal devices of different standard versions or terminal devices supporting different functions is only carried in the second level SCI, and the first level SCI is for all terminal devices (for example, including terminal devices of different standard versions (for example, the third generation partnership project (3rd generation partnership project, 3GPP) version Rel-16 terminal device, 3GPP Rel-17 terminal device), terminal devices that support geographic location-based multicast, or terminal devices that support resource assistance One or more) required public information, including control information for interception and user autonomous resource selection, then all the terminal devices can coexist in a resource pool, because the time-frequency resources are excluded based on When the first-level SCI is eliminated, all the terminal devices can mutually eliminate unavailable resources by detecting the first-level SCI, thereby reducing the probability of resource conflicts and improving resource utilization.
  • the first terminal device may include the first information in the second-level SCI and send it.
  • the first terminal device transmits the first control information to the third terminal device, and the third terminal device receives the first control information from the first terminal device.
  • the first control information may include a first SCI and a second SCI, the first SCI being the first level SCI, and the second SCI being the second level SCI.
  • the second SCI can include the first information.
  • the first SCI may include a first field, and the first field may indicate that the second-level SCI scheduled by the first SCI includes the first information.
  • the second level SCI scheduled by the first SCI is the second SCI. That is, the first field may indicate that the second SCI includes the first information.
  • the first SCI is a first-level SCI and is sent by broadcasting. If a terminal device receiving the first SCI can recognize the first field, it can be determined that the second SCI includes the first information. For example, if the third terminal device receives the first SCI and the second SCI, and can identify the first field, the third terminal device can determine that the second SCI includes the first information, and the third terminal device is analyzing the second SCI When you get the first information from it.
  • the third terminal device can recognize the format of the second SCI, so that the first information can be obtained correctly.
  • the priority information in the first SCI may be priority information of data to be sent to the third terminal device, or may be the priority of data corresponding to/scheduled by the first SCI.
  • the second SCI may also include one or more of the following information: layer 1 (layer 1, L1) source ID (source ID), L1 destination ID (destination ID), geographic location information of the first terminal device, Or communication range information.
  • layer 1 layer 1, L1 source ID (source ID), L1 destination ID (destination ID), geographic location information of the first terminal device, Or communication range information.
  • the second SCI includes the L1 source identifier; or, the second SCI includes the L1 target identifier; or, the second SCI includes the geographic location information of the first terminal device; or, the second SCI includes communication range information; or, the second SCI Including the L1 source identification and the L1 target identification; or, the second SCI includes the L1 source identification, the L1 target identification, and the geographic location information of the first terminal device; or, the second SCI includes the L1 source identification, the L1 target identification, and the first terminal device Geographic location information and communication range information, etc.
  • the L1 source identifier is used to indicate the first terminal device
  • the L1 target identifier is used to indicate the third terminal device.
  • the L1 source identifier and the L1 target identifier can be used to indicate the data sent by the first terminal device to the third terminal device (including but not limited to the service to which the data belongs), then the first terminal device and the third terminal device can be based on the L1 source Identification and L1 target identification to determine whether the current communication is related to itself.
  • the geographic location information of the first terminal device may be zone identification information (Zone ID) or other geographic location-related information, which is used to identify the geographic location of the first terminal device; the communication range information is used to indicate the information sent by the first terminal device.
  • the communication range required for control and/or data.
  • the third terminal device can determine whether to respond to control information or data from the first terminal device based on the geographic location information and communication range information of the first terminal device. For example, the third terminal device determines that the control information and/or data from the first terminal device does not meet the requirements of the communication range information included in the second SCI (for example, the communication range is 100m), then the third terminal device may not respond to the information from the first terminal.
  • the information (control information and/data) of the device responds, for example, the second information is not sent to the first terminal device; on the contrary, the third terminal device can respond to the information (control information and/data) from the first terminal device. In response, for example, the second information is sent to the first terminal device.
  • the information from the first terminal device does not meet the requirements of the communication range information, it indicates that the first terminal device and the third terminal device are far away. In this case, even if the third terminal device sends the first terminal device to the first terminal device, The second information is not very helpful to the sending process of the first terminal device, so the third terminal device may not need to send the second information to the first terminal device. In this way, the signaling overhead can be reduced.
  • the first information may be sent repeatedly, that is, the first information may be sent again in the time slot after n+ta_1.
  • the time-frequency resource used to repeatedly send the first information can be indicated by the first SCI, so that the third terminal device can correctly receive the repeatedly sent first information.
  • the first terminal device may also retransmit the first information to the third terminal device on the sixth time-frequency resource, and the first SCI may indicate the sixth time. Frequency resources.
  • the third terminal device can receive the retransmitted first information from the first terminal device in the sixth time-frequency resource according to the instruction of the first SCI.
  • the embodiment of the present application does not limit the number of repeated transmissions of the first information.
  • FIG. 7 which is a schematic diagram of repeated transmission of the first information.
  • the first terminal device triggers resource selection in time slot n, and the first terminal device selects resources in the resource selection window [n+t 1 ,n according to the listening result in the listening window [nt 0 ,nt proc,0 +t 2 ] in the time slot n+t a_1 through the second level SCI (the first SCI-2 from left to right in FIG.
  • the first-level SCI sent by a_1 (the first SCI-1 from left to right in Figure 7) also indicates the time-frequency resource for repeatedly sending the first information, and the time-domain position of the time-frequency resource is time slot n+t a_2 , the first terminal device repeatedly sends the first information to the third terminal device through the second level SCI (the second SCI-2 from left to right in FIG. 7) in the time slot n+t a_2.
  • FIG slot n 7 + t a for example, transmitting second information to the first terminal device is a terminal device when the third domain location.
  • the data in Figure 7 may or may not be sent.
  • the first information can be used to trigger the third terminal device to determine the second information. After the second information is determined, the third terminal device can send the second information to the first terminal device. This involves the third terminal device needing to determine The time-frequency resource used to send the second information.
  • the first information may also indicate a fourth time-frequency resource, the fourth time-frequency resource may be determined by the first terminal device according to a listening result of the first terminal device, and the fourth time-frequency resource may Used for the third terminal device to determine the time-frequency resource for sending the second information.
  • the fourth time-frequency resource is the available time-frequency resource determined by the first terminal device according to the interception result.
  • the fourth time-frequency resource can be understood as a recommended resource, indicating that the first terminal device is receiving on the fourth time-frequency resource.
  • the interference from other terminal devices during data can meet the receiving conditions, that is, it does not affect the reliability of the reception, or in other words, it means that the first terminal device receives more interference from other terminal devices when receiving data on the fourth time-frequency resource. small. Therefore, the first terminal device recommends that the third terminal device use the fourth time-frequency resource to send the second information to the first terminal device.
  • the fourth time-frequency resource is an unavailable time-frequency resource determined by the first terminal device according to the interception result, indicating that interference from other terminal devices that the first terminal device receives when receiving data on the fourth time-frequency resource cannot satisfy the reception
  • the condition which will affect the achievement of the reception reliability, or in other words, indicates that the first terminal device receives greater interference from other terminal devices when receiving data on the fourth time-frequency resource.
  • the first information indicating the fourth time-frequency resource can be considered as instructing the third terminal device to not use the fourth time-frequency resource to send the second information as much as possible.
  • the fourth time-frequency resource may include time-domain resources, or include frequency-domain resources, or include time-domain resources and frequency-domain resources.
  • the time domain resource may include one or more time slots
  • the frequency domain resource may include one or more subchannels.
  • the first information may not indicate the fourth time-frequency resource, but the first SCI may indicate the time-frequency resource used to send the second information.
  • the first SCI may indicate the fifth time-frequency resource, the fifth time-frequency resource may be determined by the first terminal device according to the listening result of the first terminal device, and the fifth time-frequency resource may be used to send the second information.
  • the fifth time-frequency resource is the available time-frequency resource determined by the first terminal device according to the interception result, indicating that interference from other terminal devices when the first terminal device receives data on the fifth time-frequency resource can meet the receiving conditions, that is, The achievement of the standard that does not affect the reception reliability, or in other words, indicates that the first terminal device receives less interference from other terminal devices when receiving data on the fifth time-frequency resource. Therefore, the first terminal device instructs the third terminal device to use the fifth time-frequency resource to send the second information to the first terminal device. In this case, the third terminal device does not need to determine the time-frequency resource for sending the second information according to other factors (such as the interception result of the third terminal device, etc.), and directly determines that the fifth time-frequency resource is used for sending.
  • the time-frequency resource of the second information is sufficient. That is, the first terminal device reserves the time-frequency resource for the third terminal device to send the second information through the first-level SCI. Referring to FIG. 8, the first terminal device sends the first SCI (ie SCI-1 in FIG. 8) to the third terminal device in the time slot n+t a_1 .
  • the first SCI includes information about the fifth time-frequency resource, such as the first SCI.
  • the time domain position of the five-time-frequency resource is the time slot n+t a .
  • the data in Figure 8 may or may not be sent.
  • the third terminal device may also jointly determine the time-frequency resource for sending the second information according to the listening result of the third terminal device and the fourth time-frequency resource. In this case, the third terminal device’s selection of the time-frequency resource for sending the second information takes into account both the receiving situation of the third terminal device and the listening situation of the third terminal device on the resource, so that the selected Time-frequency resources are more appropriate. If the first SCI indicates the fifth time-frequency resource, the fifth time-frequency resource is the time-frequency resource reserved by the first terminal device for the third terminal device to send the second information.
  • the third terminal device can directly send the second information in the fifth time-frequency resource, and there is no need to determine the time-frequency resource for sending the second information according to other factors.
  • This method can simplify the operation process of the third terminal device and speed up the process of sending the second information by the third terminal device, thereby reducing the time delay of the first data.
  • the first information may further include information for indicating the size of the data packet of the first data.
  • the second information can be used to determine the time-frequency resource for sending data to the third terminal device, that is, the second information can indicate the corresponding time-frequency resource, so the third terminal device can also determine the second information based on the third The terminal device's listening result is determined.
  • the third terminal device performs resource exclusion based on the interception result, it can be performed based on the packet size of the first data. Therefore, the first terminal device can inform the third terminal device of the packet size information of the first data for the first time. Three terminal devices perform resource exclusion.
  • the data packet size of the first data may include the size of the subchannel occupied by the first data, that is, how many subchannels the first data occupies. For example, the number of all sub-channels occupied by the first data is recorded as L sub .
  • the third terminal device performs resource exclusion based on the listening result, it can be performed based on the size of the subchannel occupied by the PSSCH carrying the first data. Therefore, the first terminal device can reduce the size of the subchannel occupied by the first data. The information is notified to the third terminal device.
  • the PSSCH carrying the first data occupies 2 subchannels, and the third terminal device can exclude resources based on the size of the two subchannels when the third terminal device performs resource exclusion based on the listening results, instead of depending on other sizes (for example, 1 subchannel). Or 3 sub-channels, etc.) for resource exclusion.
  • the data packet size of the first data may include a transport block (TB) size (transport block, TB) corresponding to the first data, and the third terminal device may exclude resources according to the TB size.
  • the data packet size of the first data may also include other information.
  • the first terminal device sends the first information to the third terminal device to trigger the third terminal device to perform the resource assistance process.
  • the first terminal device can trigger the third terminal device to perform the resource assistance process when there is a demand, which can reduce the redundant information received by the first terminal device, and the manner is more flexible.
  • the first terminal device can also inform the third terminal device of the data packet size of the first data, so that the second time-frequency resource indicated by the third terminal device through the second information is more consistent with the first data, and the resource assistance process Can be more precise.
  • the resource assistance process may be a process in which the third terminal device listens to its surrounding terminal devices as described in steps S63 to S64, that is, detects the side control information of the surrounding terminal devices, and determines the second information according to the detection result.
  • the third terminal device can also actively perform the resource assistance process without triggering by the first terminal device, that is, without receiving the first information from the first terminal device, the resource assistance process can be performed.
  • S62 may not be executed, that is, the first terminal device does not need to send the first information to the third terminal device, and the third terminal device may actively send the second information. Therefore, S62 is an optional step and does not have to be performed, and is represented by a dotted line in FIG. 6.
  • the third terminal device may periodically send the second information, the third terminal device may send the second information in a broadcast mode or a multicast mode, for example, and one or more terminal devices around the third terminal device may receive information from the third terminal device. The second information of the third terminal device.
  • the resource for sending data to the third terminal device can be determined according to the second information. In this way, there is no need for the first terminal device to send information to trigger the third terminal device.
  • the third terminal device can actively perform the resource assistance process, which helps to save the signaling overhead between the first terminal device and the third terminal device. .
  • the first information may include information indicating the packet size of the first data
  • the third terminal device performs resource exclusion based on the listening result. It can be done according to the data packet size of the first data. If the first terminal device does not send the first information to the third terminal device, the third terminal device cannot know which terminal device will send data to the third terminal device, nor can it know the packet size of the data to be sent. Then the third terminal device can perform resource exclusion according to one or more data packet sizes. For example, the data packet size of a piece of data includes the size of the sub-channel occupied by the data, that is, how many sub-channels the data occupies.
  • the third terminal device when the third terminal device performs resource exclusion based on the listening result, it can be performed based on the size of one or more sub-channels.
  • the size of one or more sub-channels may be pre-configured in the third terminal device, or the third terminal device may determine the size of one or more sub-channels occupied by data historically received or sent by the third terminal device, so that the third The terminal device may exclude resources according to the size of one or more sub-channels.
  • the size of 3 sub-channels is pre-configured in the third terminal device, which are 1 sub-channel, 2 sub-channels, and 3 sub-channels.
  • the third terminal device performs resource exclusion based on the listening results, it can be based on 1 sub-channel.
  • the second time-frequency resource that may be determined by the third terminal device may include at least one time-frequency resource, and the at least one time-frequency resource may include the first part of the time-frequency resource, the second part of the time-frequency resource, or the third time-frequency resource. One or more of some time-frequency resources.
  • the first part of time-frequency resources includes all or part of the time-frequency resources determined by the third terminal device according to the resource exclusion result 1
  • the second part of time-frequency resources includes all or part of the time-frequency resources determined by the third terminal device according to the resource exclusion result 2.
  • the third part of the time-frequency resources includes all or part of the time-frequency resources determined by the third terminal device according to the resource exclusion result 3.
  • the third terminal device detects the side-line control information from at least one fourth terminal device to determine the second time-frequency resource.
  • the second time-frequency resource may be used to determine the time-frequency resource for sending data to the third terminal device.
  • the at least one fourth terminal device may include the first terminal device, or may not include the first terminal device.
  • the third terminal device can listen (or detect), that is, the third terminal device detects the SCI from at least one fourth terminal device.
  • the third terminal device detects the SCI from at least one fourth terminal device in the resource listening window (n+t a_1 -t 0 ,n+t a_1 -t proc,0 ), obtains the listening result, and based on the listening The result is in the resource selection window Time-frequency resources are selected within, where t 2 ⁇ t′ 2 ⁇ the remaining PDB.
  • the third terminal device may determine the time-frequency resource for sending the first information according to the listening result of the third terminal device and the fourth time-frequency resource, In addition, the time-frequency resource indicated by the second information, that is, the second time-frequency resource, may also be determined according to the listening result; or, if the first information received by the third terminal device does not indicate the fourth time-frequency resource, but the first The first SCI received by the three terminal devices indicates the fifth time-frequency resource, the third terminal device may determine to send the second information through the fifth time-frequency resource, and the third terminal device may determine the second information according to the interception result of the third terminal device. Time-frequency resources.
  • the third terminal device determines the time-frequency resource for sending the second information according to the interception result of the third terminal device and the fourth time-frequency resource.
  • the fourth time-frequency resource is considered by the first terminal device.
  • the situation of the available time-frequency resources that is, the first terminal device recommends the third terminal device to use the fourth time-frequency resource to send the second information.
  • the third terminal device may determine to send the second information through the fourth time-frequency resource.
  • the third terminal device determines that the fourth time-frequency resource is excluded from use based on the detection of side control information from at least one fourth terminal device, that is, the fourth time-frequency resource is not available to the third terminal device If the time-frequency resource is used, the third terminal device can determine whether the priority of the second data is higher than the first priority threshold. If the priority of the second data is higher than the first priority threshold, the third terminal device can use the time-frequency resource (ie, the available time-frequency resource) determined according to the listening result of the third terminal device that is not excluded from use.
  • the time-frequency resource ie, the available time-frequency resource
  • the third terminal device may determine to send the second information through the fourth time-frequency resource .
  • the second data is data to be sent by the fourth terminal device that has reserved the fourth time-frequency resource through the fourth time-frequency resource, and the priority of the second data may be from the fourth terminal device received through the third terminal device.
  • the first level of the device is indicated by the SCI.
  • the fourth time-frequency resource is an unavailable time-frequency resource for the third terminal device, it indicates that the third terminal device determines through listening that the fourth time-frequency resource has been reserved by other terminal devices, then the second data is The other terminal device reserves the data to be transmitted by the fourth time-frequency resource.
  • the first priority threshold may be determined by the third terminal device, or determined through negotiation between the first terminal device and the third terminal device, or may be configured by a network device, or may also be specified by a protocol.
  • the third terminal device determines whether the priority of the second data is higher than the priority of the first data. If the priority of the second data is higher than the priority of the first data, the third terminal device can use the time-frequency resource (ie, the available time-frequency Resource) to select the time-frequency resource used to send the second information; or, if the priority of the second data is lower than or equal to the priority of the first data, the third terminal device may determine to send the second information through the fourth time-frequency resource Two information.
  • the time-frequency resource ie, the available time-frequency Resource
  • the fourth time-frequency resource may also be a time-frequency resource considered unavailable by the first terminal device, that is, the first terminal device instructs the third terminal device to try not to use the fourth time-frequency resource to send the second information. If this is the case, when the third terminal device determines the time-frequency resource for sending the second information, if it is determined that the fourth time-frequency resource is excluded from use according to the detection of the SCI from at least one fourth terminal device, Then the third terminal device may select the time-frequency resource for sending the second information from the time-frequency resources (that is, the available time-frequency resources) that are not excluded from use determined according to the listening result of the third terminal device; and If it is determined that the fourth time-frequency resource is not excluded from use according to the detection of the side control information from at least one fourth terminal device, the third terminal device can obtain the result of the interception from the third terminal device. The time-frequency resource for sending the second information is selected from the used time-frequency resources (that is, the available time-frequency resources), and the fourth time-frequency resource is not selected
  • the third terminal device selects the time-frequency resource for sending the second information.
  • the embodiment of the present application does not limit the third terminal device to use other ways to select the time-frequency resource for sending the second information. resource.
  • the second information may indicate the second time-frequency resource.
  • the second time-frequency resource is the available time-frequency resource determined by the third terminal device by detecting the SCI from at least one fourth terminal device, that is, the second time-frequency resource includes data that can be used to send data to the third terminal device.
  • the second time-frequency resource can be understood as a recommended resource, indicating that interference from other terminal devices that the third terminal device receives when receiving data on the second time-frequency resource can meet the receiving conditions, that is, it does not
  • the compliance that affects the reception reliability indicates that the third terminal device receives less interference from other terminal devices when receiving data on the second time-frequency resource.
  • the third terminal device recommends that the first terminal device use the second time-frequency resource to transmit data to the third terminal device.
  • the second time-frequency resource is an unusable time-frequency resource determined by the third terminal device by detecting the SCI from at least one fourth terminal device, that is, the second time-frequency resource includes the unavailable time-frequency resource for the third terminal device.
  • the time-frequency resource of the data sent by the device indicates that the third terminal device's interference from other terminal devices when receiving data on the second time-frequency resource cannot meet the receiving conditions, that is, it will affect the reception reliability standard, or in other words, it indicates that the third terminal device receives data on the second time-frequency resource.
  • the third terminal device instructs the first terminal device to try not to use the second time-frequency resource to transmit data to the third terminal device.
  • the second time-frequency resource may include time-domain resources, or include frequency-domain resources, or include time-domain resources and frequency-domain resources.
  • the time domain resource may include one or more time slots
  • the frequency domain resource may include one or more subchannels.
  • the third terminal device sends the second information to the first terminal device, and the first terminal device receives the second information from the third terminal device.
  • the second information is used as a resource auxiliary process, so the second information may also be referred to as auxiliary information, or the second information may also have other names, and the names do not constitute a restriction on technical features.
  • the third terminal device determines the time-frequency resource used to send the second information, and determines the second time-frequency resource indicated by the second information, and can send the second information to the first terminal device.
  • the second information may indicate the second time-frequency resource, and the second time-frequency resource is used to determine the time-frequency resource for sending data to the third terminal device.
  • the time slot of the time-frequency resource selected by the third terminal device for sending the second information needs to be in the time slot n+t 2
  • the third terminal device receives the first information from the first terminal device in the time slot n+t a_1 and is triggered to perform resource selection.
  • the SCI of the four terminal devices is tested.
  • the third terminal device performs resource exclusion, it can exclude the time-frequency resources reserved by other terminal devices for sending data, or exclude the time-frequency resources reserved by other terminal devices for sending control information, or exclude being reserved by other terminal devices Time-frequency resources used to send data and time-frequency resources reserved by other terminal devices to send control information.
  • the third terminal device if the third terminal device fails to receive the first information in the time slot n+ta_1 , the third terminal device can receive the retransmitted first information from the first terminal device in the time slot n+ta_2, then the first The third terminal device will also be triggered to perform resource listening in the time slot n+t a_2 , that is, the third terminal device can trigger the resource listening every time it receives the first information. If the third terminal device has listened for multiple times and the listening results are consistent, it can perform resource exclusion based on the listening results; or if the third terminal device has listened multiple times and the listening results are inconsistent, then When the terminal device performs operations such as resource exclusion, the resource listening process triggered by the last received first information may prevail.
  • N+ta_2 in FIG. 9 represents the time domain position at which the third terminal device transmits the second information to the first terminal device.
  • the third terminal device listens in the resource listening window [n+t a_1 -t 0 ,n+t a_1 -t proc,0 ) with the frequency domain size of the number of subchannels occupied by the first information (the first
  • the number of sub-channels occupied by a piece of information may be configured, pre-configured or predefined, for example, the number of sub-channels occupied by the first piece of information is 1).
  • the first information also indicates the fourth time-frequency resource, and then the third terminal device according to the listening result of the third terminal device and the fourth time-frequency resource, in the resource selection window [n+t a_1 +t 1 ,n+t′ 2 ] Determine the time-frequency resource used to send the second information.
  • the third terminal device chooses to send the second information in the time slot n+t a_2 , the second information indicates the second time-frequency resource, and the second time-frequency resource is, for example, the third terminal device is listening on the resource [n+t a_1- t 0 ,n+t a_1 -t proc,0 ) in the frequency domain size of L sub to listen to the available time-frequency resources determined, for example, the time-domain position of the second time-frequency resource is time slot n+t a , The starting sub-channel position and length in the frequency domain are L sub .
  • the first-level SCI is generally broadcast information, and all terminal devices need to receive and decode the first-level SCI.
  • the first level SCI includes control information for line interception and user autonomous resource selection, such as time-frequency resource information, priority information, or One or more of information such as periodic time-frequency resource information that reflects the data service cycle.
  • the second-level SCI can have different formats, for example, it contains different control information fields for different transmissions, such as multicast based on geographic location.
  • the control information required for terminal devices of different standard versions or terminal devices supporting different functions is only carried in the second level SCI, and the first level SCI is for all terminal devices (for example, including terminal devices of different standard versions ( For example, 3GPP Rel-16 terminal device, 3GPP Rel-17 terminal device), a terminal device that supports geographic location-based multicast, or one or more of terminal devices that support resource assistance) required public information, including
  • all the terminal devices described can coexist in a resource pool, because the time-frequency resources are excluded according to the first-level SCI, and all the terminal devices described Both can mutually exclude unavailable resources by detecting the first-level SCI, reduce the probability of resource conflicts, and improve resource utilization.
  • the third terminal device may include the second information in the second-level SCI and send it.
  • the third terminal device transmits the second control information to the first terminal device, and the first terminal device receives the second control information from the third terminal device.
  • the second control information may include a third SCI and a fourth SCI, the third SCI is the first level SCI, and the fourth SCI is the second level SCI.
  • the fourth SCI can include the second information.
  • the third SCI may include a second field, and the second field may indicate that the second level SCI scheduled by the third SCI includes second information.
  • the second level SCI scheduled by the third SCI is the fourth SCI. That is, the second field may indicate that the fourth SCI includes the second information.
  • the third SCI is the first level SCI, which is sent by broadcasting. If the terminal device receiving the third SCI can recognize the second field, it can determine that the fourth SCI includes the second information. For example, the third terminal device receives the third SCI and the fourth SCI, and can identify the second field, then the third terminal device can determine that the fourth SCI includes the second information, and the third terminal device is analyzing the second SCI The second information will be obtained from it. In this way, the third terminal device can recognize the format of the fourth SCI, so that the second information can be correctly obtained.
  • the first terminal device determines a third time-frequency resource according to the second time-frequency resource and the first time-frequency resource. Or, the first terminal device determines that the second time-frequency resource is the third time-frequency resource.
  • the third time-frequency resource is a time-frequency resource used by the first terminal device to send data to the third terminal device.
  • the first terminal device may directly determine that the second time-frequency resource is used to send data to the third terminal device.
  • the third terminal device sends data, that is, the first terminal device does not need to consider other factors (such as the listening result of the first terminal device, etc.) when determining the time-frequency resource for sending data to the third terminal device, but determines the second terminal device.
  • the time-frequency resource is the third time-frequency resource.
  • the implementation is relatively simple, which simplifies the operation process, speeds up the transmission of the first data, and reduces the time delay of the first data.
  • the first terminal device may determine the third time-frequency resource according to the second time-frequency resource and the first time-frequency resource. Frequency resources.
  • the second time-frequency resource indicated by the second information includes a time-frequency resource that can be used to send data to a third terminal device or is not available to send data to a third terminal device
  • the first terminal device determines the third time-frequency resource according to the second time-frequency resource and the first time-frequency resource, instead of directly determining that the second time-frequency resource is the third time-frequency resource.
  • the first terminal device determines the third time-frequency resource based on the second time-frequency resource and the first time-frequency resource.
  • the second time-frequency resource includes the time-frequency resource that can be used to send data to the third terminal device. Condition.
  • the first terminal device may determine to send data through the second time-frequency resource, and in this case, the second time-frequency resource and the third time-frequency resource are the same time-frequency resource.
  • the first terminal device can determine whether the priority of the third data is higher than the second priority threshold.
  • the first terminal device may determine that the first time-frequency resource is The third time-frequency resource, or, if the first time-frequency resource includes a time-frequency resource that is not available for sending data to the third terminal device, the first terminal device may obtain information based on the detection of the SCI from at least one second terminal device.
  • the apparatus may determine to send data through the second time-frequency resource, and in this case, the second time-frequency resource and the third time-frequency resource are the same time-frequency resource.
  • the third data is the data to be transmitted by the second time-frequency resource by the second terminal device that has reserved the second time-frequency resource, and the priority of the third data may be from the second terminal device received by the first terminal device.
  • the first level of the device is indicated by the SCI.
  • the second priority threshold may be determined by the first terminal device, or determined through negotiation between the first terminal device and the third terminal device, or may be configured by a network device, or may be specified by a protocol.
  • the first terminal device can determine whether the priority of the third data is higher than the priority of the first data.
  • the first terminal device may determine the first time-frequency resource Is a third time-frequency resource, or if the first time-frequency resource includes a time-frequency resource that is not available for sending data to a third terminal device, the first terminal device may be The third time-frequency resource is selected from the determined time-frequency resources (that is, the available time-frequency resources) that are not excluded from use; or, if the priority of the third data is lower than or equal to the priority of the first data, the first A terminal device may determine to send data through the second time-frequency resource. In this case, the second time-frequency resource and the third time-frequency resource are the same time-frequency resource.
  • the third data and the priority of the third data please refer to the previous paragraph.
  • the second time-frequency resource may also include time-frequency resources that are not available for sending data to the third terminal device. If this is the case, when the first terminal device determines the time-frequency resource for sending data, if it is determined that the second time-frequency resource is excluded from use based on the detection of the SCI from at least one second terminal device, then, If the first time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device, the first terminal device may determine that the first time-frequency resource is the third time-frequency resource, or if the first time-frequency resource includes unavailable For the time-frequency resource for sending data to the third terminal device, the first terminal device can obtain the unexcluded time-frequency resource (ie, the available time-frequency resource) determined based on the detection of the SCI from the at least one second terminal device.
  • the unexcluded time-frequency resource ie, the available time-frequency resource
  • the first terminal device may determine that the first time-frequency resource is the third time-frequency resource, or if the first time-frequency resource includes the time-frequency resource that is not available for sending data to the third terminal device Frequency resources, the first terminal device may select a third time-frequency resource from time-frequency resources (that is, available time-frequency resources) that are not excluded from use determined according to the detection of the SCI from at least one second terminal device, And the second time-frequency resource is not selected as the third time-frequency resource.
  • time-frequency resources that is, available time-frequency resources
  • the first terminal device selects the time-frequency resource for sending data.
  • the embodiment of the present application does not limit the first terminal device to use other ways to select the time-frequency resource for sending data.
  • the first terminal device sends the first data to the third terminal device through the third time-frequency resource, and the third terminal device receives the first data from the first terminal device through the third time-frequency resource.
  • the first terminal device sends the first data to the third terminal device as an example, but what is actually sent may be control information, or data, or control information and data. If what is sent is control information, or control information and data, the methods in the embodiments of this application are also applicable.
  • the third terminal device listens within the resource listening window [n+ ta_1- t 0 , n+ ta_1- t proc, 0 ) to determine the second time-frequency resource.
  • the third terminal device receives the first data from the first terminal device on the time slot n+t a within the resource selection window [n+t a_1 +t 1 ,n+t′ 2 ], and the first data is carried by the PSSCH, slot n + t a time domain position of the third time-frequency resources.
  • the first information sent by the first terminal device and the second information sent by the third terminal device can use the same control information format, that is, carry the first information
  • the size of the second SCI and the fourth SCI carrying the second information are the same.
  • the value of some fields is defined as 0, or some fields do not exist and can be filled with reserved bits to ensure the second
  • the size of the SCI and the fourth SCI are the same, so that it is possible to avoid defining a new second-level SCI format as much as possible, thereby reducing the signaling overhead of indicating different second-level SCI formats.
  • the first information may not be included in the second SCI, for example, carried in the media access control (MAC) control element (CE), and/or, the second information may not include In the fourth SCI, for example, it is carried in the MAC CE.
  • MAC media access control
  • CE control element
  • the first terminal device may select the time-frequency resource for sending data to the third terminal device according to the interception result of the third terminal device, or may select the time-frequency resource for sending data to the third terminal device according to the interception result of the first terminal device and the first terminal device.
  • the interception results of the three terminal devices are used to select the time-frequency resource used to send data to the third terminal device, which solves the problem that the selected time-frequency resource may be used by other terminals due to the incomplete interception result of the first terminal device.
  • the problem of device interference or misjudgment can further reduce the probability of resource selection conflicts, and improve transmission reliability and system resource utilization.
  • FIG. 11 is a schematic block diagram of a communication device 1100 according to an embodiment of the application.
  • the communication device 1100 is, for example, the first terminal device 1100.
  • the first terminal device 1100 includes a processing module 1110 and a transceiver module 1120.
  • the first terminal device 1100 may be a terminal device, or may be a chip applied to the terminal device or other combination devices, components, etc. having the above-mentioned terminal device functions.
  • the transceiver module 1120 may be a transceiver
  • the transceiver may include an antenna and a radio frequency circuit, etc.
  • the processing module 1110 may be a processor, such as a baseband processor.
  • the baseband processor may include one or Multiple central processing units (central processing units, CPUs).
  • the transceiver module 1120 may be a radio frequency unit, and the processing module 1110 may be a processor, such as a baseband processor.
  • the transceiver module 1120 may be an input/output interface of a chip (such as a baseband chip), and the processing module 1110 may be a processor of the chip system, and may include one or more central processing units.
  • the processing module 1110 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 1120 may be implemented by a transceiver or a transceiver-related circuit component.
  • the processing module 1110 may be used to perform all operations other than the transceiving operations performed by the first terminal device in the embodiment shown in FIG. 6, such as S61 and S65, and/or to support the technology described herein Other processes.
  • the transceiving module 1120 may be used to perform all the transceiving operations performed by the first terminal device in the embodiment shown in FIG. 6, such as S62, S64, and S66, and/or other processes used to support the technology described herein.
  • the transceiver module 1120 may be a functional module that can perform both sending operations and receiving operations.
  • the transceiver module 1120 may be used to perform all the operations performed by the first terminal device in the embodiment shown in FIG. 6 Sending operation and receiving operation.
  • the transceiver module 1120 when performing a sending operation, can be considered as a sending module, and when performing a receiving operation, the transceiver module 1120 can be considered as a receiving module; or, the transceiver module 1120 can also have two functions.
  • the transceiver module 1120 can be regarded as the collective name of these two functional modules.
  • the two functional modules are the sending module and the receiving module.
  • the sending module is used to complete the sending operation.
  • the sending module can be used to perform the implementation shown in Figure 6.
  • the receiving module is used to complete all the sending operations performed by the first terminal device.
  • the receiving module can be used to perform all the operations performed by the first terminal device in the embodiment shown in FIG. 6 Receive operation.
  • the processing module 1110 is configured to detect side control information from at least one second terminal device to determine the first time-frequency resource, the at least one second terminal device includes a third terminal device, and the first time-frequency resource
  • the resources include time-frequency resources that are not available for sending data to the third terminal device;
  • the transceiver module 1120 is configured to send first information to the third terminal device, where the first information is used to trigger the determination of the second information;
  • the transceiver module 1120 is further configured to receive the second information from the third terminal device, where the second information is used to indicate a second time-frequency resource, and the second time-frequency resource is used to determine the The time-frequency resource for the device to send data;
  • the processing module 1110 is further configured to determine a third time-frequency resource according to the first time-frequency resource and the second time-frequency resource;
  • the transceiver module 1120 is further configured to send first data to the third terminal device through the third time-frequency resource.
  • the transceiver module 1120 is configured to send the first information to the third terminal device in the following manner:
  • the first control information includes a first SCI and a second SCI
  • the first SCI is a first-level SCI
  • the second SCI is a second-level SCI
  • the second SCI includes the first information.
  • the first information is further used to indicate a fourth time-frequency resource
  • the fourth time-frequency resource is used to determine a time-frequency resource for sending the second information.
  • the first SCI is used to indicate a fifth time-frequency resource
  • the fifth time-frequency resource is used to send the second information
  • the first SCI further includes a first field, and the first field is used to indicate that the second SCI includes the first information.
  • the transceiver module 1120 is further configured to retransmit the first information to the third terminal device in a sixth time-frequency resource, and the sixth time-frequency resource is allocated by the first SCI instruct.
  • the transceiver module 1120 is configured to receive the second information from the third terminal device in the following manner:
  • the second control information includes a third SCI and a fourth SCI
  • the third SCI is a first-level SCI
  • the fourth SCI is a second-level SCI
  • the fourth SCI includes the second information.
  • the third SCI further includes a second field, and the second field is used to indicate that the fourth SCI includes the second information.
  • the first information further includes information used to indicate the data packet size of the first data, and the data packet size of the first data is used to determine the second time-frequency resource .
  • the third time-frequency resource is the second time-frequency resource
  • the transceiver module 1120 is configured to send the second time-frequency resource to the third terminal device through the third time-frequency resource in the following manner.
  • the processing module 1110 is configured to detect side-line control information from at least one second terminal device to determine the first time-frequency resource, and is also configured to detect side-line control information from the at least one second terminal device to determine the seventh Time-frequency resources, where the seventh time-frequency resource is the earliest time-frequency resource in the time domain among the available time-frequency resources determined according to the detected side-line control information;
  • the transceiver module 1120 is configured to send first information to the third terminal device in the following manner: send the first information to the third terminal device through the seventh time-frequency resource.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device; or,
  • the second time-frequency resource includes time-frequency resources that are not available for sending data to the third terminal device.
  • FIG. 12 is a schematic block diagram of a communication device 1200 according to an embodiment of the application.
  • the communication device 1200 is, for example, a third terminal device 1200.
  • the third terminal device 1200 includes a processing module 1210 and a transceiver module 1220.
  • the third terminal device 1200 may be a terminal device, or may be a chip applied to the terminal device, or other combination devices, components, etc. having the above-mentioned terminal device functions.
  • the transceiver module 1220 may be a transceiver
  • the transceiver may include an antenna and a radio frequency circuit, etc.
  • the processing module 1210 may be a processor, such as a baseband processor.
  • the baseband processor may include one or Multiple CPUs.
  • the transceiver module 1220 may be a radio frequency unit, and the processing module 1210 may be a processor, such as a baseband processor.
  • the transceiver module 1220 may be an input/output interface of a chip (such as a baseband chip), and the processing module 1210 may be a processor of the chip system, and may include one or more central processing units.
  • the processing module 1210 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 1220 may be implemented by a transceiver or a transceiver-related circuit component.
  • the processing module 1210 may be used to perform all operations other than the transceiving operation performed by the third terminal device in the embodiment shown in FIG. 6, such as S63, and/or other operations used to support the technology described herein. process.
  • the transceiving module 1220 may be used to perform all the transceiving operations performed by the third terminal device in the embodiment shown in FIG. 6, such as S62, S64, and S66, and/or other processes used to support the technology described herein.
  • the transceiver module 1220 may be a functional module that can perform both sending operations and receiving operations.
  • the transceiver module 1220 may be used to perform all the operations performed by the third terminal device in the embodiment shown in FIG. 6 Sending operation and receiving operation.
  • the transceiver module 1220 when performing a sending operation, can be considered as a sending module, and when performing a receiving operation, the transceiver module 1220 can be considered as a receiving module; or, the transceiver module 1220 can also have two functions.
  • the transceiver module 1220 can be regarded as a collective term for these two functional modules.
  • the two functional modules are the sending module and the receiving module.
  • the sending module is used to complete the sending operation.
  • the sending module can be used to perform the implementation shown in Figure 6.
  • the receiving module is used to complete the receiving operation.
  • the receiving module can be used to perform all the operations performed by the third terminal device in the embodiment shown in FIG. 6 Receive operation.
  • the transceiver module 1220 is configured to receive first information from the first terminal device, and the first information is used to trigger the determination of the second information;
  • the processing module 1210 is configured to detect side control information from at least one fourth terminal device to determine a second time-frequency resource, the at least one fourth terminal device includes the first terminal device, and the second time-frequency resource The resource is used to determine the time-frequency resource for sending data by the first terminal device;
  • the transceiver module 1220 is further configured to send the second information to the first terminal device, where the second information is used to indicate the second time-frequency resource;
  • the transceiver module 1220 is also configured to receive first data from the first terminal device.
  • the transceiver module 1220 is configured to receive the first information from the first terminal device in the following manner:
  • the second SCI includes the first information.
  • the first information is further used to indicate a fourth time-frequency resource
  • the fourth time-frequency resource is used to determine a time-frequency resource for sending the second information.
  • processing module 1210 is further configured to:
  • the detection of the side control information from the at least one fourth terminal device it is determined that the fourth time-frequency resource is not excluded from use, and it is determined that the second information is sent through the fourth time-frequency resource; or,
  • the fourth time-frequency resource is excluded from use. Then, when the priority of the second data is higher than the priority threshold, it is determined to pass the failure
  • the time-frequency resource excluded from use sends the second information; otherwise, it is determined to send the second information through the fourth time-frequency resource; or,
  • the fourth time-frequency resource is excluded from use, then, when the priority of the second data is higher than the priority of the first data.
  • the second data is data to be sent by the fourth terminal device that reserves the fourth time-frequency resource through the fourth time-frequency resource.
  • the first SCI is used to indicate a fifth time-frequency resource
  • the fifth time-frequency resource is used to send the second information
  • the processing module 1210 is further configured to determine to send the second information through the fifth time-frequency resource.
  • the first SCI further includes a first field, and the first field is used to indicate that the second SCI includes the first information.
  • the transceiver module 1220 is further configured to receive the retransmitted first information from the first terminal device in a sixth time-frequency resource, where the sixth time-frequency resource is allocated by the The first SCI instruction.
  • the transceiver module 1220 is configured to send the second information to the first terminal device in the following manner:
  • the second control information includes a third SCI and a fourth SCI
  • the third SCI is a first level SCI
  • the fourth SCI is a second level SCI
  • the fourth SCI includes the second information.
  • the third SCI further includes a second field, and the second field is used to indicate that the fourth SCI includes the second information.
  • the first information further includes information for indicating the size of the data packet of the first data
  • the processing module 1210 is configured to detect the side line from the at least one first terminal device in the following manner Control information to determine the second time-frequency resource:
  • the second time-frequency resource is determined according to the detection result and the data packet size of the first data.
  • the second time-frequency resource includes time-frequency resources that can be used to send data to the third terminal device 1200; or,
  • the second time-frequency resources include time-frequency resources that are not available for sending data to the third terminal device 1200.
  • the transceiver module 1220 is configured to receive the first data from the first terminal device in the following manner:
  • the first data from the first terminal device is received through a third time-frequency resource, where the third time-frequency resource is determined according to the first time-frequency resource and the second time-frequency resource, and the first time-frequency resource is The frequency resource is determined by the first terminal device detecting side control information from at least one second terminal device.
  • the embodiment of the present application also provides a communication device, and the communication device may be a terminal device or a circuit.
  • the communication device may be used to perform the actions performed by the first terminal device in the foregoing method embodiments.
  • FIG. 13 shows a simplified schematic diagram of the structure of the terminal device. It is easy to understand and easy to illustrate.
  • the terminal device uses a mobile phone as an example.
  • the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 13 only one memory and processor are shown in FIG. 13. In an actual terminal device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with transceiving functions can be regarded as the transceiving unit of the terminal device (the transceiving unit can be a functional unit that can realize the sending and receiving functions; or the transceiving unit can also be It includes two functional units, namely a receiving unit capable of realizing the receiving function and a transmitting unit capable of realizing the transmitting function), and the processor with the processing function is regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1310 and a processing unit 1320.
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1310 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1310 as the sending unit, that is, the transceiver unit 1310 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiving unit 1310 is configured to perform sending and receiving operations on the terminal device side in the foregoing method embodiment
  • processing unit 1320 is configured to perform other operations on the terminal device in the foregoing method embodiment except for the transceiving operation.
  • the processing unit 1320 may be used to perform all operations performed by the first terminal device in the embodiment shown in FIG. 6 except for receiving and sending operations, such as S61 and S65, and/or using To support other processes of the technology described in this article.
  • the transceiving unit 1310 may be used to perform all the transceiving operations performed by the first terminal device in the embodiment shown in FIG. 6, such as S62, S64, and S66, and/or other processes used to support the technology described herein.
  • the processing unit 1320 may be configured to perform all operations other than the transceiving operations performed by the third terminal device in the embodiment shown in FIG. 6, such as S63, and/or for Other processes that support the technology described in this article.
  • the transceiving unit 1310 may be used to perform all the transceiving operations performed by the third terminal device in the embodiment shown in FIG. 6, such as S62, S64, and S66, and/or other processes used to support the technology described herein.
  • the device may include a transceiver unit and a processing unit.
  • the transceiving unit may be an input/output circuit and/or a communication interface;
  • the processing unit is an integrated processor or microprocessor or integrated circuit.
  • the device shown in FIG. 14 can be referred to.
  • the device can perform functions similar to the processing module 1110 in FIG. 11.
  • the device can perform functions similar to the processing module 1210 in FIG. 12.
  • the device includes a processor 1410, a data sending processor 1420, and a data receiving processor 1430.
  • the processing module 1110 in the foregoing embodiment may be the processor 1410 in FIG. 14 and complete corresponding functions; the transceiver module 1120 in the foregoing embodiment may be the sending data processor 1420 in FIG. 14 and/or receiving data Processor 1430, and complete the corresponding functions.
  • the processing module 1210 in the foregoing embodiment may be the processor 1410 in FIG.
  • the transceiving module 1220 in the foregoing embodiment may be the sending data processor 1420 in FIG. 14, and/or Receive data processor 1430 and complete corresponding functions.
  • the channel encoder and the channel decoder are shown in FIG. 14, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are only illustrative.
  • the processing device 1500 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the communication device in this embodiment can be used as the modulation subsystem therein.
  • the modulation subsystem may include a processor 1503 and an interface 1504.
  • the processor 1503 completes the function of the aforementioned processing module 1110
  • the interface 1504 completes the function of the aforementioned transceiver module 1120.
  • the processor 1503 completes the function of the aforementioned processing module 1210
  • the interface 1504 completes the function of the aforementioned transceiver module 1220.
  • the modulation subsystem includes a memory 1506, a processor 1503, and a program stored in the memory 1506 and running on the processor.
  • the processor 1503 executes the program, the terminal device side in the above method embodiment is implemented.
  • Methods It should be noted that the memory 1506 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1500, as long as the memory 1506 can be connected to the The processor 1503 is fine.
  • the embodiment of the present application provides a communication system.
  • the communication system may include the first terminal device involved in the embodiment shown in FIG. 6 and the third terminal device involved in the embodiment shown in FIG. 6 described above.
  • the first terminal device is, for example, the first terminal device 1100 in FIG. 11.
  • the third terminal device is, for example, the third terminal device 1200 in FIG. 12.
  • the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer can implement the method shown in FIG. 6 provided by the foregoing method embodiment.
  • the process related to the first terminal device in the embodiment is not limited to the embodiment.
  • the embodiments of the present application also provide a computer-readable storage medium, the computer-readable storage medium is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the method shown in FIG. 6 provided by the foregoing method embodiment.
  • the process related to the third terminal device in the embodiment is not limited to the embodiment.
  • the embodiments of the present application also provide a computer program product, the computer program product is used to store a computer program, when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 6 provided by the above method embodiment The process related to the first terminal device.
  • the embodiments of the present application also provide a computer program product, the computer program product is used to store a computer program, when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 6 provided by the above method embodiment The flow related to the third terminal device.
  • processors mentioned in the embodiments of this application may be a CPU, or other general-purpose processors, digital signal processors (digital signal processors, DSP), application specific integrated circuits (ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic RAM
  • DRAM dynamic random access memory
  • 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 connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM 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
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned computer-readable storage medium may be any available medium that can be accessed by a computer.
  • computer-readable media can include random access memory (RAM), read-only memory (ROM), and electrically erasable programmable read-only memory (electrically erasable programmable read-only memory).
  • RAM random access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • USB flash disk universal serial bus flash disk
  • mobile hard disk or other optical disk storage
  • disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer.

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Abstract

本申请涉及一种通信方法、装置及系统,适用于车联网、智能驾驶、辅助驾驶、智能网联车等领域。第一终端装置检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源。第一终端装置向第三终端装置发送第一信息,用于触发确定第二信息。第一终端装置接收来自第三终端装置的第二信息,指示第二时频资源,第二时频资源用于确定向第三终端装置发送数据的时频资源。第一终端装置根据第二时频资源和第一时频资源确定第三时频资源,并通过第三时频资源向第三终端装置发送第一数据。第一终端装置可以将第一终端装置的侦听结果和第三终端装置的侦听结果均作为考虑因素以选择发送数据的资源,以提高信号接收质量。

Description

一种通信方法、装置及系统 技术领域
本申请涉及移动通信技术领域,尤其涉及一种通信方法、装置及系统。
背景技术
在侧行通信过程中,作为发送端的终端设备(称为发送端终端设备)可以在一个时隙(slot)内向作为接收端的终端设备(称为接收端终端设备)发送侧行控制信息(sidelink control information,SCI)和侧行数据,接收端终端设备通过接收SCI来接收和译码该侧行数据。在新空口(new radio,NR)-车到一切(vehicle to everything,V2X)系统中,对于发送端终端设备来说存在两种资源分配模式,其中的一种资源分配模式为模式1(mode-1),在mode-1下由基站为发送端终端设备分配资源;另一种资源分配模式为mode-2,在mode-2下由发送端终端设备自行选择资源。
在mode-2下,发送端终端设备在时隙n触发资源选择,在以时隙范围所定义的资源侦听窗(sensing window)内获取侦听结果。发送端终端设备根据该侦听结果,在以时隙范围定义的资源选择窗内排除不可用的时频资源,得到该资源选择窗内可用的时频资源,再从这些可用的时频资源中确定属于侧行链路(sidelink,SL)的时频资源,再从这些属于sidelink的时频资源中选择时频资源以发送数据。
可见,目前发送端终端设备只是根据发送端终端设备的侦听结果发送数据,但发送端终端设备并不知晓接收端终端设备周围的信道情况。如果在接收端终端设备周围还存在其他终端设备在通信,但是发送端终端设备没有侦听到,则对于接收端终端设备而言,其在接收来自发送端终端设备数据时,就有可能受到其他终端设备的侧行通信所带来的强干扰,导致接收端终端设备的信号接收质量较差,甚至可能接收失败。
发明内容
本申请实施例提供一种通信方法、装置及系统,用于提高侧行通信过程中接收端的信号接收质量。
第一方面,提供第一种通信方法,该方法包括:检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,所述至少一个第二终端装置包括第三终端装置,所述第一时频资源包括不可用于向所述第三终端装置发送数据的时频资源;向所述第三终端装置发送第一信息,所述第一信息用于触发确定第二信息;接收来自所述第三终端装置的所述第二信息,所述第二信息用于指示第二时频资源,所述第二时频资源用于确定向第三终端装置发送数据的时频资源;根据所述第一时频资源和所述第二时频资源确定第三时频资源;通过所述第三时频资源向所述第三终端装置发送第一数据。
该方法可由第一通信装置执行,第一通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置,例如芯片。示例性地,所述第一通信装置为终端装置,该终端装置为终端设备,或者为设置在终端设备中的用于实现终端设备的功能的芯片,或 者为用于实现终端设备的功能的其他部件。在下文的介绍过程中,以第一通信装置是第一终端装置为例。
在本申请实施例中,作为数据发送端的第一终端装置可以向第三终端装置发送第一信息,从而第三终端装置可以向第一终端装置发送第二信息,该第二信息可以包括第二时频资源,第一终端装置在选择时频资源时可以将第二时频资源作为参考因素。例如第二时频资源包括可用于向第三终端装置发送数据的时频资源,表明第一终端装置如果在第二时频资源上向第三终端装置发送数据,则第三终端装置在接收该数据时受到干扰的可能性就比较小,则第一终端装置可以优先选择第二时频资源向第三终端装置发送数据,可以提高信号接收质量,也尽量避免出现接收失败的情况。或者,第二时频资源包括不可用于向第三终端装置发送数据的时频资源,表明第一终端装置如果在第二时频资源上向第三终端装置发送数据,则第三终端装置在接收该数据时受到干扰的可能性就比较大,则第一终端装置可以不选择第二时频资源向第三终端装置发送数据。可见在本申请实施例中,第一终端装置在选择发送数据的资源时,不仅可以将第一终端装置的侦听结果作为考虑因素,还可以将第三终端装置的侦听结果作为考虑因素,使得所选择的资源既考虑了第一终端装置周围的信道情况,也考虑了第三终端装置周围的信道情况,以提高信号接收质量。
在一种可选的实施方式中,向所述第三终端装置发送第一信息,包括:
向所述第三终端装置发送第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
一个终端装置在发送侧行信息时,一般都会发送第一级SCI(1st-stage SCI)和第二级SCI(2nd-stage SCI),还可能发送数据(data),对此可以理解为,终端装置在发送侧行信息时可以只发送控制信息(第一级SCI和第二级SCI),或者只发送数据,或者也可以发送第一级SCI、第二级SCI和数据。其中,第一级SCI例如在控制信道发送,第二级SCI例如在数据信道发送。另外,第一级SCI可以指示用于发送第二级SCI的时频资源。那么,第一终端装置可以将第一信息包括在其中的一个SCI中发送给第三终端装置。第一级SCI一般为广播信息,第二级SCI一般是发送给一个终端装置的单播信息。而第一信息只需要发送给待接收第一数据的第三终端装置即可,无需发送给其他终端装置,因此第一终端装置不必将第一信息包括在第一级SCI中,而是将第一信息包括在第二级SCI中即可。通过这种单播发送方式,使得第三终端装置可以接收第一信息,且其他终端装置不会接收第一信息,提高第三终端装置能够接收第一信息的成功率,也减小对于其他终端装置的干扰。另外,如果将第一信息包括在第一级SCI中,则版本较老的终端装置无法识别第一信息,则这些终端装置无法排除第一终端装置所要预约的时频资源,可能会占用第一终端装置所要预约的时频资源。而终端装置在排除时频资源时一般是根据第一级SCI进行排除,因此如果将第一信息包括在第二级SCI中,则对于版本较老的终端装置没有影响,无论是老版本的终端装置还是新版本的终端装置都可以正常进行资源排除,老版本的终端装置也不会因为无法排除第一终端装置所要预约的时频资源而占用这些时频资源,可以减小资源冲突的概率。
在一种可选的实施方式中,所述第一信息还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
例如,第四时频资源是第一终端装置根据侦听结果确定的可用的时频资源,此时第四 时频资源可以理解为推荐资源,表明第一终端装置在第四时频资源上接收数据时受到的其他终端装置的干扰可以满足接收条件,即不影响接收可靠性的达标,或者说,是表明第一终端装置在第四时频资源上接收数据时受到的其他终端装置的干扰较小。因此,第一终端装置推荐第三终端装置使用第四时频资源向第一终端装置发送第二信息。或者,第四时频资源是第一终端装置根据侦听结果确定的不可用的时频资源,表明第一终端装置在第四时频资源上接收数据时受到的其他终端装置的干扰无法满足接收条件,即会影响接收可靠性的达标,或者说,是表明第一终端装置在第四时频资源上接收数据时受到的其他终端装置的干扰较大。在这种情况下,第一信息指示第四时频资源,可以认为是指示第三终端装置尽量不使用第四时频资源发送第二信息。通过第一信息指示第四时频资源,可以辅助第三终端装置尽快确定用于发送第二信息的时频资源,能够提高确定用于发送第二信息的时频资源的效率,而且也能提高第一终端装置对于第二信息的接收成功率。
在一种可选的实施方式中,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
第五时频资源是第一终端装置根据侦听结果确定的可用的时频资源,表明第一终端装置在第五时频资源上接收数据时受到的其他终端装置的干扰可以满足接收条件,即不影响接收可靠性的达标,或者说,是表明第一终端装置在第五时频资源上接收数据时受到的其他终端装置的干扰较小。因此,第一终端装置指示第三终端装置使用第五时频资源向第一终端装置发送第二信息。在这种情况下,第三终端装置无需再根据其他因素(例如第三终端装置的侦听结果等)确定用于发送第二信息的时频资源,直接确定第五时频资源为用于发送第二信息的时频资源即可。通过指示第五时频资源,有助于减轻第三终端装置的负担,提高确定用于发送第二信息的时频资源的效率,且也能提高第一终端装置对于第二信息的接收成功率。
在一种可选的实施方式中,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
第一字段可以复用第一SCI中的已有字段,或者也可以是第一SCI中的新增字段。第一SCI是第一级SCI,是通过广播方式发送的,接收第一SCI的终端装置如果能够识别第一字段,则可以确定第二SCI包括第一信息。例如第三终端装置接收了第一SCI和第二SCI,且能识别第一字段,则第三终端装置就可以明确第二SCI包括了第一信息,第三终端装置在对第二SCI进行解析时就会从中获得第一信息。通过这种方式使得第三终端装置能够识别第二SCI的格式,从而能够正确获得第一信息。
在一种可选的实施方式中,所述方法还包括:
在第六时频资源向所述第三终端装置重传所述第一信息,所述第六时频资源由所述第一SCI指示。
为了提高第一信息的发送成功率,作为一种可选的实施方式,第一信息还可以重复发送。如果第一终端装置会重复发送第一信息,则用于重复发送第一信息的时频资源可以通过第一SCI指示,从而第三终端装置能够正确接收重复发送的第一信息。例如,第一终端装置在第七时频资源向第三终端装置发送第一信息之后,还可以在第六时频资源向第三终端装置重传第一信息,第一SCI可以指示第六时频资源。从而第三终端装置根据第一SCI的指示,就可以在第六时频资源接收来自第一终端装置的重传的第一信息。
在一种可选的实施方式中,接收来自所述第三终端装置的所述第二信息,包括:
接收来自所述第三终端装置的第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
因为第二信息只需要发送给待发送第一数据的第一终端装置即可,无需发送给其他终端装置,因此第三终端装置不必将第二信息包括在第一级SCI中,而是将第二信息包括在第二级SCI中即可。因此,作为发送第二信息的一种可选的实施方式,第三终端装置可以将第二信息包括在第二级SCI中发送。例如,第三终端装置向第一终端装置发送第二控制信息,第一终端装置接收来自第三终端装置的第二控制信息。第二控制信息可以包括第三SCI和第四SCI,第三SCI为第一级SCI,第四SCI为第二级SCI。第四SCI就可以包括第二信息。通过这种单播发送方式,使得第一终端装置可以接收第二信息,且其他终端装置不会接收第一信息,提高第一终端装置能够接收第一信息的成功率,也减小对于其他终端装置的干扰。另外,如果将第二信息包括在第一级SCI中,则版本较老的终端装置无法识别第二信息,则这些终端装置无法排除第一终端装置所要预约的时频资源,可能会占用第一终端装置所要预约的时频资源。而终端装置在排除时频资源时一般是根据第一级SCI进行排除,因此如果将第二信息包括在第二级SCI中,则对于版本较老的终端装置没有影响,无论是老版本的终端装置还是新版本的终端装置都可以正常进行资源排除,老版本的终端装置也不会因为无法排除第一终端装置所要预约的时频资源而占用这些时频资源,可以减小资源冲突的概率。
在一种可选的实施方式中,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
第二字段可以复用第三SCI中的已有字段,或者也可以是第三SCI中的新增字段。第三SCI是第一级SCI,是通过广播方式发送的,接收第三SCI的终端装置如果能够识别第二字段,则可以确定第四SCI包括第二信息。例如第三终端装置接收了第三SCI和第四SCI,且能识别第二字段,则第三终端装置就可以明确第四SCI包括了第二信息,第三终端装置在对第二SCI进行解析时就会从中获得第二信息。通过这种方式使得第三终端装置能够识别第四SCI的格式,从而能够正确获得第二信息。
在一种可选的实施方式中,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,所述第一数据的数据包大小用于确定所述第二时频资源。
因为第二信息可以用于确定向第三终端装置发送数据的时频资源,也就是说,第二信息可以指示相应的时频资源,那么第三终端装置确定第二信息时也可以根据第三终端装置的侦听结果来确定。而第三终端装置根据侦听结果进行资源排除时,可以根据第一数据的数据包大小来进行,因此第一终端装置可以将第一数据的数据包大小的信息告知第三终端装置,以便第三终端装置进行资源排除。例如,第一数据的数据包大小可以包括第一数据占用的子信道的大小,即第一数据占用多少个子信道,或者,第一数据的数据包大小可以包括第一数据对应的传输块大小,或者,第一数据的数据包大小还可以包括其他的信息。
在一种可选的实施方式中,所述第三时频资源为所述第二时频资源,通过所述第三时频资源向所述第三终端装置发送第一数据,包括:
通过所述第二时频资源向所述第三终端装置发送所述第一数据。
例如,第一终端装置根据对来自至少一个第二终端装置的SCI的检测,确定第二时频资源未被排除使用,即,第二时频资源对于第一终端装置来说也是可用的时频资源,则第 一终端装置可以确定通过第二时频资源发送数据,此时第二时频资源和第三时频资源为同一时频资源。
在一种可选的实施方式中,
检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,还包括:
检测来自所述至少一个第二终端装置的侧行控制信息,以确定第七时频资源,所述第七时频资源是根据所述检测的侧行控制信息确定的可用的时频资源中在时域上最早的时频资源;
向所述第三终端装置发送第一信息,包括:
通过所述第七时频资源向所述第三终端装置发送所述第一信息。
第七时频资源用于向第三终端装置发送第一信息,
第一终端装置要先向第三终端装置发送第一信息,再接收来自第三终端装置的第二信息,之后才能向第三终端装置发送第一数据,而目前规定,一个终端装置向另一个终端装置发送数据,需要保证该数据在remaining packet delay budget内得到发送,否则会视为发送失败。因此,可以理解的,为了保证第一数据的发送在remaining packet delay budget之内,第七时频资源的时域位置越早越好。例如,第一终端装置根据侦听结果确定了一个或多个可用的时频资源,第七时频资源可以是这一个或多个可用的时频资源中在时域上最早的时频资源,或者,第七时频资源也可以不是这一个或多个可用的时频资源中在时域上最早的时频资源,只要满足t 1≤t a_1<t 2即可,t a_1表示第七时频资源的时域位置。
在一种可选的实施方式中,
所述第二时频资源包括可用于向所述第三终端装置发送数据的时频资源;或,
所述第二时频资源包括不可用于向所述第三终端装置发送数据的时频资源。
例如第二时频资源包括可用于向第三终端装置发送数据的时频资源,表明第一终端装置如果在第二时频资源上向第三终端装置发送数据,则第三终端装置在接收该数据时受到干扰的可能性就比较小,则第一终端装置可以优先选择第二时频资源向第三终端装置发送数据,可以提高信号接收质量,也尽量避免出现接收失败的情况。或者,第二时频资源包括不可用于向第三终端装置发送数据的时频资源,表明第一终端装置如果在第二时频资源上向第三终端装置发送数据,则第三终端装置在接收该数据时受到干扰的可能性就比较大,则第一终端装置可以不选择第二时频资源向第三终端装置发送数据。
第二方面,提供第二种通信方法,该方法包括:接收来自第一终端装置的第一信息,所述第一信息用于触发确定第二信息;检测来自至少一个第四终端装置的侧行控制信息,以确定第二时频资源,所述至少一个第四终端装置包括所述第一终端装置,所述第二时频资源用于确定所述第一终端装置发送数据的时频资源;向所述第一终端装置发送所述第二信息,所述第二信息用于指示所述第二时频资源;接收来自所述第一终端装置的第一数据。
该方法可由第二通信装置执行,第二通信装置可以是通信设备或能够支持通信设备实现该方法所需的功能的通信装置,例如芯片。示例性地,所述第二通信装置为终端装置,该终端装置为终端设备,或者为设置在终端设备中的用于实现终端设备的功能的芯片,或者为用于实现终端设备的功能的其他部件。在下文的介绍过程中,以第二通信装置是第三终端装置为例。
在一种可选的实施方式中,接收来自第一终端装置的第一信息,包括:
接收来自所述第一终端装置的第一控制信息,所述第一控制信息包括第一SCI和第二 SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
在一种可选的实施方式中,所述第二SCI还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
在一种可选的实施方式中,所述方法还包括:
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源未被排除使用,确定通过所述第四时频资源发送所述第二信息;或,
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于优先级门限时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;或,
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于所述第一数据的优先级时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;
其中,所述第二数据为预约所述第四时频资源的第四终端装置待通过所述第四时频资源发送的数据。
如果第三终端装置根据对来自至少一个第四终端装置的侧行控制信息的检测,确定第四时频资源未被排除使用,即,第四时频资源对于第三终端装置来说是可用的时频资源,则第三终端装置可以确定通过第四时频资源发送第二信息。
或者,如果第三终端装置根据对来自至少一个第四终端装置的侧行控制信息的检测,确定第四时频资源被排除使用,即,第四时频资源对于第三终端装置来说是不可用的时频资源,则第三终端装置可以确定第二数据的优先级是否高于第一优先级门限。如果第二数据的优先级高于第一优先级门限,则第三终端装置可以从根据第三终端装置的侦听结果所确定的未被排除使用的时频资源(即,可用的时频资源)中选择用于发送第二信息的时频资源;或者,如果第二数据的优先级低于或等于第一优先级门限,则第三终端装置可以确定通过第四时频资源发送第二信息。其中,第二数据是预约了第四时频资源的第四终端装置待通过第四时频资源所发送的数据,第二数据的优先级可以是通过第三终端装置接收的来自该第四终端装置的第一级SCI指示的。即,既然第四时频资源对于第三终端装置来说是不可用的时频资源,表明第三终端装置通过侦听确定第四时频资源已经被其他终端装置所预约,那么第二数据就是该其他终端装置预约第四时频资源所要发送的数据。所述的第一优先级门限可以是第三终端装置确定的,或者是第一终端装置和第三终端装置协商确定的,或者可以是网络设备配置的,或者也可以是协议规定的。
或者,如果第三终端装置根据对来自至少一个第四终端装置的侧行控制信息的检测,确定第四时频资源被排除使用,即,第四时频资源对于第三终端装置来说是不可用的时频资源,则第三终端装置可以确定第二数据的优先级是否高于第一数据的优先级。如果第二数据的优先级高于第一数据的优先级,则第三终端装置可以从根据第三终端装置的侦听结果所确定的未被排除使用的时频资源(即,可用的时频资源)中选择用于发送第二信息的时频资源;或者,如果第二数据的优先级低于或等于第一数据的优先级,则第三终端装置可以确定通过第四时频资源发送第二信息。关于第二数据及第二数据的优先级等内容的解释可参考上一段落。
第四时频资源还有可能是第一终端装置认为的不可用的时频资源的情况,即,第一终端装置指示第三终端装置尽量不使用第四时频资源发送第二信息。如果是这种情况,则第三终端装置在确定用于发送第二信息的时频资源时,如果根据对来自至少一个第四终端装置的SCI的检测,确定第四时频资源被排除使用,则第三终端装置可以从根据第三终端装置的侦听结果所确定的未被排除使用的时频资源(即,可用的时频资源)中选择用于发送第二信息的时频资源;而如果根据对来自至少一个第四终端装置的侧行控制信息的检测,确定第四时频资源未被排除使用,则第三终端装置可以从根据第三终端装置的侦听结果所确定的未被排除使用的时频资源(即,可用的时频资源)中选择用于发送第二信息的时频资源,且不选择第四时频资源。
在一种可选的实施方式中,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
在一种可选的实施方式中,所述方法还包括:确定通过所述第五时频资源发送所述第二信息。
在一种可选的实施方式中,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
在一种可选的实施方式中,所述方法还包括:在第六时频资源接收来自所述第一终端装置的重传的所述第一信息,所述第六时频资源由所述第一SCI指示。
在一种可选的实施方式中,向所述第一终端装置发送所述第二信息,包括:
向所述第一终端装置发送第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
在一种可选的实施方式中,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
在一种可选的实施方式中,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,检测来自至少一个第一终端装置的侧行控制信息,以确定第二时频资源,包括:
根据检测结果以及所述第一数据的数据包大小确定所述第二时频资源。
在一种可选的实施方式中,
所述第二时频资源包括可用于向所述第三终端装置发送数据的时频资源;或,
所述第二时频资源包括不可用于向所述第三终端装置发送数据的时频资源。
在一种可选的实施方式中,接收来自所述第一终端装置的第一数据,包括:
通过第三时频资源接收来自所述第一终端装置的第一数据,其中,所述第三时频资源根据第一时频资源和所述第二时频资源确定的,所述第一时频资源是所述第一终端装置检测来自至少一个第二终端装置的侧行控制信息而确定的。
关于第二方面或第二方面的部分可选的实施方式所带来的技术效果,可参考对于第一方面或相应的实施方式的技术效果的介绍。
第三方面,提供一种通信装置,例如该通信装置为如前所述的第一通信装置。所述第一通信装置用于执行上述第一方面或任一可能的实施方式中的方法。具体地,所述第一通信装置可以包括用于执行第一方面或任一可能的实施方式中的方法的模块,例如包括处理模块和收发模块。示例性地,收发模块可以包括发送模块和接收模块,发送模块和接收模块可以是不同的功能模块,或者也可以是同一个功能模块,但能够实现不同的功能。示例 性地,所述第一通信装置为通信设备,或者为设置在通信设备中的芯片或其他部件。示例性地,所述通信设备为终端设备。下面以第一通信装置是第一终端装置为例,第一终端装置可以是终端设备,或者可以是设置在终端设备中的芯片或其他部件。例如,所述收发模块也可以通过收发器实现,所述处理模块也可以通过处理器实现。或者,发送模块可以通过发送器实现,接收模块可以通过接收器实现,发送器和接收器可以是不同的功能模块,或者也可以是同一个功能模块,但能够实现不同的功能。如果第一通信装置为通信设备,收发器例如通过通信设备中的天线、馈线和编解码器等实现。或者,如果第一通信装置为设置在通信设备中的芯片,那么收发器(或,发送器和接收器)例如为芯片中的通信接口,该通信接口与通信设备中的射频收发组件连接,以通过射频收发组件实现信息的收发。在第三方面的介绍过程中,继续以所述第一通信装置是第一终端装置,以及,以所述处理模块和所述收发模块为例进行介绍。其中,
所述处理模块,用于检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,所述至少一个第二终端装置包括第三终端装置,所述第一时频资源包括不可用于向所述第三终端装置发送数据的时频资源;
所述收发模块,用于向所述第三终端装置发送第一信息,所述第一信息用于触发确定第二信息;
所述收发模块,还用于接收来自所述第三终端装置的所述第二信息,所述第二信息用于指示第二时频资源,所述第二时频资源用于确定向第三终端装置发送数据的时频资源;
所述处理模块,还用于根据所述第一时频资源和所述第二时频资源确定第三时频资源;
所述收发模块,还用于通过所述第三时频资源向所述第三终端装置发送第一数据。
在一种可选的实施方式中,所述收发模块用于通过如下方式向所述第三终端装置发送第一信息:
向所述第三终端装置发送第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
在一种可选的实施方式中,所述第一信息还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
在一种可选的实施方式中,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
在一种可选的实施方式中,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
在一种可选的实施方式中,所述收发模块,还用于在第六时频资源向所述第三终端装置重传所述第一信息,所述第六时频资源由所述第一SCI指示。
在一种可选的实施方式中,所述收发模块用于通过如下方式接收来自所述第三终端装置的所述第二信息:
接收来自所述第三终端装置的第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
在一种可选的实施方式中,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
在一种可选的实施方式中,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,所述第一数据的数据包大小用于确定所述第二时频资源。
在一种可选的实施方式中,所述第三时频资源为所述第二时频资源,所述收发模块用于通过如下方式通过所述第三时频资源向所述第三终端装置发送第一数据:
通过所述第二时频资源向所述第三终端装置发送所述第一数据。
在一种可选的实施方式中,
所述处理模块用于检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,还用于检测来自所述至少一个第二终端装置的侧行控制信息,以确定第七时频资源,所述第七时频资源是根据所述检测的侧行控制信息确定的可用的时频资源中在时域上最早的时频资源;
所述收发模块,用于通过如下方式向所述第三终端装置发送第一信息:通过所述第七时频资源向所述第三终端装置发送所述第一信息。
在一种可选的实施方式中,
所述第二时频资源包括可用于向所述第三终端装置发送数据的时频资源;或,
所述第二时频资源包括不可用于向所述第三终端装置发送数据的时频资源。
关于第三方面或各种可选的实施方式所带来的技术效果,可参考对于第一方面或相应的实施方式的技术效果的介绍。
第四方面,提供一种通信装置,例如该通信装置为如前所述的第二通信装置。所述第二通信装置用于执行上述第二方面或任一可能的实施方式中的方法。具体地,所述第二通信装置可以包括用于执行第二方面或任一可能的实施方式中的方法的模块,例如包括处理模块和收发模块。示例性地,收发模块可以包括发送模块和接收模块,发送模块和接收模块可以是不同的功能模块,或者也可以是同一个功能模块,但能够实现不同的功能。示例性地,所述第二通信装置为通信设备,或者为设置在通信设备中的芯片或其他部件。示例性地,所述通信设备为终端设备。下面以第二通信装置是第三终端装置为例,第一终端装置可以是终端设备,或者可以是设置在终端设备中的芯片或其他部件。例如,所述收发模块也可以通过收发器实现,所述处理模块也可以通过处理器实现。或者,发送模块可以通过发送器实现,接收模块可以通过接收器实现,发送器和接收器可以是不同的功能模块,或者也可以是同一个功能模块,但能够实现不同的功能。如果第二通信装置为通信设备,收发器例如通过通信设备中的天线、馈线和编解码器等实现。或者,如果第二通信装置为设置在通信设备中的芯片,那么收发器(或,发送器和接收器)例如为芯片中的通信接口,该通信接口与通信设备中的射频收发组件连接,以通过射频收发组件实现信息的收发。在第四方面的介绍过程中,继续以所述第二通信装置是第三终端装置,以及,以所述处理模块和所述收发模块为例进行介绍。其中,
所述收发模块,用于接收来自第一终端装置的第一信息,所述第一信息用于触发确定第二信息;
所述处理模块,用于检测来自至少一个第四终端装置的侧行控制信息,以确定第二时频资源,所述至少一个第四终端装置包括所述第一终端装置,所述第二时频资源用于确定所述第一终端装置发送数据的时频资源;
所述收发模块,还用于向所述第一终端装置发送所述第二信息,所述第二信息用于指示所述第二时频资源;
所述收发模块,还用于接收来自所述第一终端装置的第一数据。
在一种可选的实施方式中,所述收发模块用于通过如下方式接收来自第一终端装置的第一信息:
接收来自所述第一终端装置的第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
在一种可选的实施方式中,所述第一信息还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
在一种可选的实施方式中,所述处理模块还用于:
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源未被排除使用,确定通过所述第四时频资源发送所述第二信息;或,
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于优先级门限时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;或,
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于所述第一数据的优先级时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;
其中,所述第二数据为预约所述第四时频资源的第四终端装置待通过所述第四时频资源发送的数据。
在一种可选的实施方式中,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
在一种可选的实施方式中,所述处理模块,还用于确定通过所述第五时频资源发送所述第二信息。
在一种可选的实施方式中,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
在一种可选的实施方式中,所述收发模块,还用于在第六时频资源接收来自所述第一终端装置的重传的所述第一信息,所述第六时频资源由所述第一SCI指示。
在一种可选的实施方式中,所述收发模块用于通过如下方式向所述第一终端装置发送所述第二信息:
向所述第一终端装置发送第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
在一种可选的实施方式中,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
在一种可选的实施方式中,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,所述处理模块用于通过如下方式检测来自至少一个第一终端装置的侧行控制信息,以确定第二时频资源:
根据检测结果以及所述第一数据的数据包大小确定所述第二时频资源。
在一种可选的实施方式中,
所述第二时频资源包括可用于向所述第三终端装置发送数据的时频资源;或,
所述第二时频资源包括不可用于向所述第三终端装置发送数据的时频资源。
在一种可选的实施方式中,所述收发模块用于通过如下方式接收来自所述第一终端装置的第一数据:
通过第三时频资源接收来自所述第一终端装置的第一数据,其中,所述第三时频资源根据第一时频资源和所述第二时频资源确定的,所述第一时频资源是所述第一终端装置检测来自至少一个第二终端装置的侧行控制信息而确定的。
关于第四方面或各种可选的实施方式所带来的技术效果,可参考对于第二方面或相应的实施方式的技术效果的介绍。
第五方面,提供一种通信装置,该通信装置例如为如前所述的第一通信装置。该通信装置包括处理器和通信接口,通信接口可用于与其他装置或设备进行通信。可选的,还可以包括存储器,用于存储计算机指令。处理器和存储器相互耦合,用于实现上述第一方面或各种可能的实施方式所描述的方法。或者,第一通信装置也可以不包括存储器,存储器可以位于第一通信装置外部。处理器、存储器和通信接口相互耦合,用于实现上述第一方面或各种可能的实施方式所描述的方法。例如,当处理器执行所述存储器存储的计算机指令时,使第一通信装置执行上述第一方面或任意一种可能的实施方式中的方法。示例性地,所述第一通信装置为通信设备,或者为设置在通信设备中的芯片或其他部件。示例性的,所述通信设备为终端设备。例如,第一通信装置为第一终端装置,第一终端装置为终端设备,或者为设置在终端设备中的芯片或其他部件。
其中,如果第一通信装置为通信设备,通信接口例如通过所述通信设备中的收发器(或者,发送器和接收器)实现,例如所述收发器通过所述通信设备中的天线、馈线和编解码器等实现。或者,如果第一通信装置为设置在通信设备中的芯片,那么通信接口例如为芯片的输入/输出接口,例如输入/输出管脚等,该通信接口与通信设备中的射频收发组件连接,以通过射频收发组件实现信息的收发。
第六方面,提供一种通信装置,该通信装置例如为如前所述的第二通信装置。该通信装置包括处理器和通信接口,通信接口可用于与其他装置或设备进行通信。可选的,还可以包括存储器,用于存储计算机指令。处理器和存储器相互耦合,用于实现上述第二方面或各种可能的实施方式所描述的方法。或者,第二通信装置也可以不包括存储器,存储器可以位于第二通信装置外部。处理器、存储器和通信接口相互耦合,用于实现上述第二方面或各种可能的实施方式所描述的方法。例如,当处理器执行所述存储器存储的计算机指令时,使第二通信装置执行上述第二方面或任意一种可能的实施方式中的方法。示例性地,所述第二通信装置为通信设备,或者为设置在通信设备中的芯片或其他部件。示例性的,所述通信设备为终端设备。例如,第二通信装置为第三终端装置,第三终端装置为终端设备,或者为设置在终端设备中的芯片或其他部件。
其中,如果第二通信装置为通信设备,通信接口例如通过所述通信设备中的收发器(或者,发送器和接收器)实现,例如所述收发器通过所述通信设备中的天线、馈线和编解码器等实现。或者,如果第二通信装置为设置在通信设备中的芯片,那么通信接口例如为芯片的输入/输出接口,例如输入/输出管脚等,该通信接口与通信设备中的射频收发组件连接,以通过射频收发组件实现信息的收发。
第七方面,提供一种芯片,所述芯片包括处理器和通信接口,所述处理器与所述通信 接口耦合,用于实现上述第一方面或任一种可选的实施方式所提供的方法。
可选的,所述芯片还可以包括存储器,例如,所述处理器可以读取并执行所述存储器所存储的软件程序,以实现上述第一方面或任一种可选的实施方式所提供的方法。或者,所述存储器也可以不包括在所述芯片内,而是位于所述芯片外部,相当于,所述处理器可以读取并执行外部存储器所存储的软件程序,以实现上述第一方面或任一种可选的实施方式所提供的方法。
第八方面,提供一种芯片,所述芯片包括处理器和通信接口,所述处理器与所述通信接口耦合,用于实现上述第二方面或任一种可选的实施方式所提供的方法。
可选的,所述芯片还可以包括存储器,例如,所述处理器可以读取并执行所述存储器所存储的软件程序,以实现上述第二方面或任一种可选的实施方式所提供的方法。或者,所述存储器也可以不包括在所述芯片内,而是位于所述芯片外部,相当于,所述处理器可以读取并执行外部存储器所存储的软件程序,以实现上述第二方面或任一种可选的实施方式所提供的方法。
第九方面,提供第一通信系统,该通信系统包括第三方面所述的通信装置、第五方面所述的通信装置或第七方面所述的通信装置。
第十方面,提供第二通信系统,该通信系统包括第四方面所述的通信装置、第六方面所述的通信装置或第八方面所述的通信装置。
第十一方面,提供一种计算机可读存储介质,所述计算机可读存储介质用于存储计算机程序,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上述第一方面或任意一种可能的实施方式中所述的方法。
第十二方面,提供一种计算机可读存储介质,所述计算机可读存储介质用于存储计算机程序,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上述第二方面或任意一种可能的实施方式中所述的方法。
第十三方面,提供一种包含指令的计算机程序产品,所述计算机程序产品用于存储计算机程序,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上述第一方面或的任意一种可能的实施方式中所述的方法。
第十四方面,提供一种包含指令的计算机程序产品,所述计算机程序产品用于存储计算机程序,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上述第二方面或的任意一种可能的实施方式中所述的方法。
在本申请实施例中,第一终端装置在选择发送数据的资源时,不仅可以将第一终端装置的侦听结果作为考虑因素,还可以将第三终端装置的侦听结果作为考虑因素,使得所选择的资源既考虑了第一终端装置周围的信道情况,也考虑了第三终端装置周围的信道情况,以提高信号接收质量。
附图说明
图1为V2X的几种应用场景的示意图;
图2为终端设备在进行资源选择时的资源侦听窗和资源选择窗的示意图;
图3为发送端终端设备在发数据时不考虑接收端终端设备的情况而导致接收失败的示意图;
图4为发送端终端设备在发数据时不考虑接收端终端设备的情况而导致资源排除过度的示意图;
图5为本申请实施例的一种应用场景示意图;
图6为本申请实施例提供的一种通信方法的流程图;
图7为本申请实施例中重复发送第一信息的一种示意图;
图8为本申请实施例中通过第一级SCI指示发送第二信息的时频资源的示意图;
图9为本申请实施例中用于发送第二信息的时频资源所在的时隙需要在时隙n+t 2之前的一种示意图;
图10为本申请实施例中第一终端装置向第三终端装置发送第一数据的一种示意图;
图11为本申请实施例提供的第一终端装置的一种示意性框图;
图12为本申请实施例提供的第三终端装置的一种示意性框图;
图13为本申请实施例提供的通信装置的一种示意性框图;
图14为本申请实施例提供的通信装置的另一示意性框图;
图15为本申请实施例提供的通信装置的再一示意性框图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚,下面将结合附图对本申请实施例作进一步地详细描述。
以下,对本申请实施例中的部分用语进行解释说明,以便于本领域技术人员理解。
1)终端装置,例如是终端设备,或者是用于实现终端设备的功能的模块,例如芯片系统,该芯片系统可以设置在终端设备中。终端设备包括向用户提供语音和/或数据连通性的设备,具体的,包括向用户提供语音的设备,或包括向用户提供数据连通性的设备,或包括向用户提供语音和数据连通性的设备。例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network,RAN)与核心网进行通信,与RAN交换语音或数据,或与RAN交互语音和数据。该终端设备可以包括用户设备(user equipment,UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device,D2D)终端设备、车到一切(vehicle to everything,V2X)终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications,M2M/MTC)终端设备、物联网(internet of things,IoT)终端设备、轻型终端设备(light UE)、订户单元(subscriber unit)、订户站(subscriber station),移动站(mobile station)、远程站(remote station)、接入点(access point,AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如,可以包括移动电话(或称为“蜂窝”电话),具有移动终端设备的计算机,便携式、袖珍式、手持式、计算机内置的移动装置等。例如,个人通信业务(personal communication service,PCS)电话、无绳电话、会话发起协议(session initiation protocol,SIP)话机、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)、等设备。还包括受限设备,例如功耗较低的设备,或存储能力有限的设备,或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification,RFID)、传感器、全球定位系统(global positioning system,GPS)、激光扫描器等信息传感 设备。
作为示例而非限定,在本申请实施例中,该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等,是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称,如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上,或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备,更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能,例如:智能手表或智能眼镜等,以及只专注于某一类应用功能,需要和其它设备如智能手机配合使用,如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备,如果位于车辆上(例如放置在车辆内或安装在车辆内),都可以认为是车载终端设备,车载终端设备例如也称为车载单元(on-board unit,OBU)。
本申请实施例中,终端设备还可以包括中继(relay)。或者理解为,能够与基站进行数据通信的都可以看作终端设备。
本申请实施例中,用于实现终端设备的功能的装置可以是终端设备,也可以是能够支持终端设备实现该功能的装置,例如芯片系统,该装置可以被安装在终端设备中。本申请实施例中,芯片系统可以由芯片构成,也可以包括芯片和其他分立器件。本申请实施例提供的技术方案中,以用于实现终端的功能的装置是终端设备为例,描述本申请实施例提供的技术方案。
2)网络设备,例如包括接入网(access network,AN)设备,例如基站(例如,接入点),可以是指接入网中在空口通过一个或多个小区与无线终端设备通信的设备,或者例如,一种车到一切(vehicle-to-everything,V2X)技术中的网络设备为路侧单元(road side unit,RSU)。基站可用于将收到的空中帧与IP分组进行相互转换,作为终端设备与接入网的其余部分之间的路由器,其中接入网的其余部分可包括IP网络。RSU可以是支持V2X应用的固定基础设施实体,可以与支持V2X应用的其他实体交换消息。网络设备还可协调对空口的属性管理。例如,网络设备可以包括第五代移动通信技术(the 5th generation,5G)新空口(new radio,NR)系统(也简称为NR系统)中的下一代节点B(next generation node B,gNB),或者也可以包括云接入网(cloud radio access network,Cloud RAN)系统中的集中式单元(centralized unit,CU)和分布式单元(distributed unit,DU),本申请实施例并不限定。
网络设备还可以包括核心网设备,核心网设备例如包括访问和移动管理功能(access and mobility management function,AMF)或用户面功能(user plane function,UPF)等。
因为本申请实施例主要涉及接入网设备,因此在下文中,如无特殊说明,则所述的网络设备均是指接入网设备。
本申请实施例中,用于实现网络设备的功能的装置可以是网络设备,也可以是能够支持网络设备实现该功能的装置,例如芯片系统,该装置可以被安装在网络设备中。在本申请实施例提供的技术方案中,以用于实现网络设备的功能的装置是网络设备为例,描述本申请实施例提供的技术方案。
3)V2X,就是车与外界进行互联互通,这是未来智能汽车、自动驾驶、智能交通运输系统的基础和关键技术。V2X将在已有的设备到设备(device-to-device,D2D)技术的基础上对V2X的具体应用需求进行优化,需要进一步减少V2X设备的接入时延,解决资源 冲突问题。
V2X具体又包括车与车(vehicle-to-vehicle,V2V)、车与路侧基础设施(vehicle-to-infrastructure,V2I)、车与行人(vehicle-to-pedestrian,V2P)的直接通信,以及车与网络(vehicle-to-network,V2N)的通信交互等几种应用需求。如图1所示。V2V指的是车辆间的通信;V2P指的是车辆与人(包括行人、骑自行车的人、司机、或乘客)的通信;V2I指的是车辆与网络设备的通信,网络设备例如RSU,另外还有一种V2N可以包括在V2I中,V2N指的是车辆与基站/网络的通信。
其中,V2P可以用做给道路上行人或非机动车安全警告。通过V2I,车辆可以与道路甚至其他基础设施,例如交通灯、路障等,进行通信,获取交通灯信号时序等道路管理信息。V2V可以用做车辆间信息交互和提醒,最典型的应用是用于车辆间防碰撞安全系统。V2N是目前应用最为广泛的车联网形式,其主要功能是使车辆通过移动网络,连接到云服务器,使用云服务器提供的导航、娱乐、或防盗等应用功能。
在V2X中,主要是终端设备和终端设备之间的通信。对于终端设备和终端设备之间的传输模式,当前标准协议支持的有广播方式,组播方式,和单播方式。
广播方式:广播方式是指作为发送端的终端设备采用广播的模式进行数据发送,多个终端设备端均能接收来自发送端的侧行链路控制信息(sidelink control information,SCI)或侧行链路共享信道(sidelink shared channel,SSCH)。
在侧行链路中,保证所有的终端设备都解析来自发送端的控制信息的方式是,发送端不对控制信息不加扰,或者发送端使用所有的终端设备都已知的扰码对控制信息加扰。
组播方式:组播方式和广播发送相似,作为发送端的终端设备采用广播的模式进行数据发送,一组终端设备均能解析SCI或SSCH。
单播方式:单播方式是一个终端设备向另外一个终端设备发送数据,其它终端设备不需要或者不能够解析该数据。
4)本申请实施例中的术语“系统”和“网络”可被互换使用。“至少一个”是指一个或者多个,“多个”是指两个或两个以上。“和/或”,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的情况,其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达,是指的这些项中的任意组合,包括单项(个)或复数项(个)的任意组合。例如,a,b,或c中的至少一项(个),可以表示:a,b,c,a-b,a-c,b-c,或a-b-c,其中a,b,c可以是单个,也可以是多个。
以及,除非有相反的说明,本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分,不用于限定多个对象的大小、内容、顺序、时序、优先级或者重要程度等。例如,第二时频资源和第一时频资源,只是为了区分不同的时频资源,而并不是表示这两个时频资源的大小、优先级或者重要程度等的不同。
前文介绍了本申请实施例所涉及到的一些名词概念,下面介绍本申请实施例涉及的技术特征。
随着无线通信技术的发展,人们对高数据速率和用户体验的需求日益增长,同时人们对了解周边人或事物并与之通信的邻近服务的需求逐渐增加,因此设备到设备D2D技术应运而生。D2D技术的应用,可以减轻蜂窝网络的负担、减少用户设备的电池功耗、提高数据速率,并能很好地满足邻近服务的需求。D2D技术允许多个支持D2D功能的终端设备 在有网络基础设施或无网络基础设施的情况下进行直接发现和直接通信。鉴于D2D技术的特点和优势,基于D2D技术的车联网应用场景被提出,但是因涉及安全性的考虑,这种场景下对时延的要求非常高,现有的D2D技术无法实现。
因此在第三代合作伙伴计划(the 3rd generation partnership project,3GPP)提出的LTE技术的网络下,V2X的车联网技术被提出。V2X通信是指车辆与外界的任何事物的通信,包括V2V、V2P、V2I、V2N,可参考图1。
V2X通信针对以车辆为代表的高速设备,是未来对通信时延要求非常高的场景下应用的基础技术和关键技术,如智能汽车、自动驾驶、智能交通运输系统等场景。LTE V2X通信可以支持有网络覆盖和无网络覆盖的通信场景,其资源分配方式可以采取网络设备调度的模式,如演进通用陆地无线接入网节点B(E-UTRAN Node B,eNB)调度模式和UE自选模式。基于V2X技术,车辆用户设备(Vehicle UE,V-UE)能将自身的一些信息,例如位置信息、速度信息、或意图信息(转弯、并线、倒车)等信息周期性或通过一些非周期性的事件的触发向周围的V-UE发送,同样地V-UE也会实时接收周围其他的V-UE的信息。
长期演进(long term evolution,LTE)-V2X解决了V2X场景中的一些部分基础性的需求,但对于未来的完全智能驾驶、自动驾驶等应用场景而言,LTE-V2X还不能有效的支持。因此5G NR技术对于V2X做了进一步发展。NR-V2X可以支持更低的传输时延,更可靠的通信传输,更高的吞吐量,更好的用户体验,满足更加广泛的应用场景需求。
在V2X的通信过程中,作为发送端的终端设备(也称为发送端终端设备)在一个时隙内向作为接收端的终端设备(也称为接收端终端设备)发送SCI和侧行数据,接收端终端设备通过接收SCI来接收和译码该侧行数据。在NR-V2X中,发送端终端设备存在两种资源分配模式,其中的一种资源分配模式为模式1(mode-1),在mode-1下由基站为发送端终端设备分配资源;另一种资源分配模式为mode-2,在mode-2下由发送端终端设备自行选择资源。
其中,mode-1主要应用于有网络覆盖的情形下的V2X通信,由基站进行资源分配。具体地,mode-1又可以包括动态调度(dynamic grant,DG)模式和预配置调度(configured grant,CG)模式。在mode-1的DG模式下,基站会通过下行控制信息(downlink control information,DCI)调度发送端终端设备向接收端终端设备发送侧行数据。在mode-1的CG模式下,基站会通过高层信令,例如无线资源控制(radio resource control,RRC)信令,配置相关的侧行时频资源。CG模式包括CG第一类型(CG type 1)和CG第二类型(CG type 2),CG第一类型是指,发送端终端设备直接在基站配置的侧行时频资源上发送侧行数据;CG第二类型是指,基站会发送DCI激活基站所配置的侧行时频资源,发送端终端设备在接收该DCI后再在基站所配置的侧行时频资源上发送侧行数据。
在mode-2下,发送端终端设备的对于侧行时频资源的选择不依赖于基站。该模式不受限于网络覆盖,在没有网络覆盖情况下,发送端终端设备也可以用该模式进行通信。
在Mode-2下,发送端终端设备在时隙n触发资源选择,在以时隙范围定义的资源侦听窗口[n-t 0,n-t proc,0)获取侦听结果,可参考图2。t 0为资源侦听窗的边界值,例如t 0可以为1100ms或100ms,或者也可以为其他值。以15kHz子载波间隔为例,t 0=1100时隙或100时隙;或者,若以60kHz子载波间隔为例,t 0=4400时隙或400时隙。t proc,0是发送端终端设备处理侦听结果的时间,根据终端设备能力的不同t proc,0的取值会有所不同,t proc,0≥0。
发送端终端设备根据该侦听结果,在以时隙范围定义的资源选择窗[n+t 1,n+t 2]内排除不可用的时频资源,进而发送端终端设备获得可用的用于发送侧行数据的时频资源,对此可继续参考图2。其中0≤t 1≤t proc,1,t proc,1是终端设备处理侦听结果的时间,根据终端设备能力的不同取值不同,根据终端设备能力的不同,t proc,1的取值会有所不同。t 2_min<t 2≤剩余的包延迟预算(packet delay budget,PDB)。PDB为一个数据包从在业务层产生到成功发送所需的最大的延时时间。例如在时刻n,剩余的PDB则为数据包从业务层产生到时刻n所剩余的延时时间。PDB的单位可以是以时隙,子帧或帧,或者也可是绝对时间,例如单位为毫秒或秒等。
发送端终端设备具体的资源选择的方式介绍如下:
1、发送端终端设备在资源侦听窗[n-t 0,n-t proc,0)内的资源池内接收来自其他终端设备的SCI,所述SCI包含其他终端设备的侦听信息。进一步地,所述SCI为第一级SCI(1st-stage SCI),在物理侧行控制信道(physical sidelink control channel,PSCCH)上发送。
其中,一个SCI可以调度3次传输,例如,这3次传输中第一次传输是初传,后两次传输是重传,或者这3次传输都是重传。所述SCI包括的侦听信息包含第二次和第三次的重传的调度数据的时频资源信息、体现数据业务周期的周期性时频资源信息和数据优先级信息(priority of PSSCH)等。可以理解的,在给定的一个时刻,一个终端设备通过发送一个SCI来预约在该时刻之后的资源(包括时频资源)用于数据的重传和新的周期性的数据的传输。
2、如果发送端终端设备从接收到的来自终端设备1的SCI的侦听信息中得知,终端设备1预约的时频资源位于发送端终端设备的资源选择窗口[n+t 1,n+t 2]内,则发送端终端设备根据该侦听信息,对终端设备1需要在该时频资源上发送的数据或控制信道的解调参考信号(demodulation reference signal,DMRS)进行测量,得到参考信号接收功率(reference signal received power,RSRP)。如果该RSRP大于预先设定的RSRP门限Th RSRP,则发送端终端设备从资源选择窗中排除该时频资源。
3、发送端终端设备在排除资源选择窗内的不可用的时频资源后,可以确定资源选择窗内剩余的资源中的可用的时频资源。从而发送端终端设备从可用的时频资源中选择时频资源以发送数据。
在现有机制中,发送端终端设备在发送数据时所使用的时频资源,是基于发送端终端设备在资源侦听窗[n-t 0,n-t proc,0)内的侦听结果来选择的。本申请实施例提供的技术方案中,除特殊说明,侦听结果是指通过上述1、2和3这3个步骤来确定的结果。但是发送端终端设备并不知晓接收端终端设备周围的信道情况。如果在接收端终端设备周围还存在其他终端设备在通信,但是发送端终端设备没有侦听到,则对于接收端终端设备而言,其在接收来自发送端终端设备数据时,就有可能受到其他终端设备的侧行通信所带来的强干扰,导致接收端终端设备的信号接收质量较差,甚至可能接收失败。
例如可参考图3。UE1根据UE1的侦听结果选择时频资源以向UE2发送数据。由于UE3和UE4与UE1之间的距离较远,因此UE1在进行侦听时,会认为判断UE1周围没有其他终端设备进行侧行通信,则UE1向UE2发送数据。但实际上UE3在向UE4发送数据,由于UE3和UE2相距较近,UE3向UE4发送数据,对于UE2接收UE1的数据来说造成了很强的干扰,导致UE2无法正确译码来自UE1的数据。
再例如,可参考图4。UE1进行侦听,能够侦听到UE3向UE4发送数据。UE1所测 量的RSRP高于预设RSRP门限Th RSRP,则UE1认为无法通过UE3使用的时频资源向UE2发送数据,会认为该时频资源是不可用的时频资源。但实际由于UE1和UE4相距很远,UE1对UE4的干扰很小,UE1向UE2发送数据并不会影响UE4接收来自UE3的数据。同样地,UE3向UE4发送数据也不会影响UE2接收来自UE1的数据。这对于UE1来说是资源排除过度的情况,会将一些本应可以使用的资源认为是不可用的时频资源,导致UE1可用的时频资源减少。
鉴于此,提供本申请实施例的技术方案。在本申请实施例中,作为数据发送端的第一终端装置可以向第三终端装置发送第一信息,从而第三终端装置可以向第一终端装置发送第二信息,该第二信息可以包括第二时频资源,第一终端装置在选择时频资源时可以将第二时频资源作为参考因素。例如第二时频资源包括可用于向第三终端装置发送数据的时频资源,表明第一终端装置如果在第二时频资源上向第三终端装置发送数据,则第三终端装置在接收该数据时受到干扰的可能性就比较小,则第一终端装置可以优先选择第二时频资源向第三终端装置发送数据,可以提高信号接收质量,也尽量避免出现接收失败的情况。或者,第二时频资源包括不可用于向第三终端装置发送数据的时频资源,表明第一终端装置如果在第二时频资源上向第三终端装置发送数据,则第三终端装置在接收该数据时受到干扰的可能性就比较大,则第一终端装置可以不选择第二时频资源向第三终端装置发送数据。可见在本申请实施例中,第一终端装置在选择发送数据的资源时,不仅可以将第一终端装置的侦听结果作为考虑因素,还可以将第三终端装置的侦听结果作为考虑因素,使得所选择的资源既考虑了第一终端装置周围的信道情况,也考虑了第三终端装置周围的信道情况,以提高信号接收质量。
本申请实施例提供的技术方案可以应用于D2D场景,例如NR-D2D场景等,或者可以应用于V2X场景,例如NR-V2X场景等,例如可应用于车联网,例如V2X、V2V等,或可用于智能驾驶、辅助驾驶、或智能网联车等领域。或者还可以应用于其他的场景或其他的通信系统,例如还可以用于NR系统或下一代移动通信系统的Uu接口的资源选择,具体的不做限制。
下面介绍本申请实施例所应用的网络架构。请参考图5,为本申请实施例所应用的一种网络架构。
图5包括网络设备和两个终端设备,分别为终端设备1和终端设备2。这两个终端设备均可以处于该网络设备的覆盖范围内;或者这两个终端设备可以只有终端设备1处于该网络设备的覆盖范围内,而终端设备2不处于该网络设备的覆盖范围内;或者这两个终端设备均不处于该网络设备的覆盖范围内。这两个终端设备之间可以通过sidelink进行通信。图5以终端设备1处于该网络设备的覆盖范围、终端设备2不处于该网络设备的覆盖范围为例。当然图5中的终端设备的数量只是举例,在实际应用中,网络设备可以为多个终端设备提供服务。
图5中的网络设备例如为接入网设备,例如基站。其中,接入网设备在不同的系统对应不同的设备,例如,在5G系统中对应5G中的接入网设备,例如gNB,或为后续演进的通信系统中的接入网设备。
其中,图5中的终端设备是以车载终端设备或车为例,但本申请实施例中的终端设备不限于此。
接下来结合附图介绍本申请实施例提供的技术方案。
本申请实施例提供一种通信方法,请参见图6,为该方法的流程图。在下文的介绍过程中,以该方法应用于图5所示的网络架构为例。
为了便于介绍,在下文中,以该方法由第一终端装置和第三终端装置执行为例。因为本实施例是以应用在图5所示的网络架构为例,因此,下文中所述的第一终端装置可以是图5所示的网络架构中的终端设备1,或者可以是设置在终端设备1中的芯片系统;下文中所述的第三终端装置可以是图5所示的网络架构中的终端设备2,或者可以是设置在终端设备2中的芯片系统。
S61、第一终端装置检测(或者,称为侦听)来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源。
在网络覆盖范围下,网络设备通过系统信息块(system information block,SIB)、小区专用(cell-specific)的RRC信令或者用户专用(UE-specific)RRC信令配置本小区内的终端装置的侧行链路(sidelink,SL)资源池(resource pool)信息。在非网络覆盖范围下,终端装置使用设备出厂时预配置的SL资源池信息选择时频资源。SL资源池信息用于指示SL资源池。终端装置在SL资源池内选择时频资源与其他终端装置进行SL通信,通信过程包括单播通信、组播通信或广播通信中的一种或多种。在SL资源池的时域上,包括一个或多个时间单元,一个时间单元可以是一个符号(symbol)、若干个符号、一个时隙、或一个子帧(subframe)等。一个SL资源池的时域上包括的一个或多个时间单元可以是在物理时间上连续的,也可以是离散的。在SL资源池的频域上,包括一个或多个频域单元,一个频域单元可以是一个资源块(resource block,RB)、若干个RB或一个子信道(sub channel)等,所述一个子信道可以包括一个或多个RB。
例如,第一终端装置要向第三终端装置发送数据,例如该数据为第一数据,则第一终端设备在时隙n进行侦听;或者,第一终端装置要向第三终端装置发送控制信息,则第一终端设备在时隙n进行侦听;或者,第一终端装置要向第三终端装置发送控制信息和数据,则第一终端设备在时隙n进行侦听,以选择资源。本申请实施例以第一终端装置要向第三终端装置发送第一数据为例,但实际发送的可能是控制信息和/或数据。其中,至少一个第二终端装置可以包括第三终端装置,至少一个第二终端装置可以包括第三终端装置是强调其他的终端装置,所以,这里也可以不包括第三终端装置。
第一终端装置在时隙n进行侦听,即,第一终端装置在时隙n检测来自至少一个第二终端装置的SCI。第一终端装置根据在以时隙范围定义的侦听窗[n-t 0,n-t proc,0)内进行侦听的侦听结果,在以时隙范围定义的资源选择窗[n+t 1,n+t 2]内选择可用的时频资源,关于第一终端装置进行资源选择的具体过程可参考前文的描述。其中,第一终端装置在进行资源排除时,可以排除被其他终端装置预约用来发送数据的时频资源,或排除被其他终端装置预约用来发送控制信息的时频资源,或排除被其他终端装置预约用来发送数据的时频资源以及被其他终端装置预约用来发送控制信息的时频资源。在本申请实施例中,在第一终端装置在发送数据之前,可以先触发第三终端装置进行资源辅助流程,因此,第一终端装置在向第三终端装置发送数据之前,可以先向第三终端装置发送第一信息,以触发第三终端装置向第一终端装置发送第二信息。例如第一终端装置可以根据侦听结果选择可用的第七时频资源,从而可以通过第七时频资源向第三终端装置发送第一信息。
例如第七时频资源的时域位置为n+t a_1,其中t 1≤t a_1<t 2。第一终端装置要先向第三终端装置发送第一信息,再接收来自第三终端装置的第二信息,之后才能向第三终端装 置发送第一数据,即t a_1在发送第一数据的时刻之前,而目前规定,一个终端装置向另一个终端装置发送数据,需要保证该数据在remaining packet delay budget内得到发送,否则会视为发送失败。因此,可以理解的,为了保证第一数据的发送在remaining packet delay budget之内,t a_1越小越好。例如,第一终端装置根据侦听结果确定了一个或多个可用的时频资源,第七时频资源可以是这一个或多个可用的时频资源中在时域上最早的时频资源,或者,第七时频资源也可以不是这一个或多个可用的时频资源中在时域上最早的时频资源,只要满足t 1≤t a_1<t 2即可。
另外,第一终端装置可以仅根据第三终端装置的第二信息确定用于向第三终端装置发送数据的时频资源,或者,第一终端装置也可以根据第一终端装置的侦听结果和第三终端装置的第二信息确定用于向第三终端装置发送数据的时频资源。如果第一终端装置根据第一终端装置的侦听结果和第三终端装置的第二信息确定用于向第三终端装置发送数据的时频资源,那么第一终端装置还可以根据侦听结果确定第一时频资源,第一时频资源可以包括不可用于向第三终端装置发送数据的时频资源,或者包括可用于向第三终端装置发送数据的时频资源。从而第一终端装置后续可以根据第一时频资源和第二信息确定用于向第三终端装置发送数据的时频资源。
S62、第一终端装置向第三终端装置发送第一信息,第三终端装置接收来自第一终端装置的第一信息。第一信息用于触发确定第二信息,其中,第一信息是可以作为触发信息,以触发第三终端装置确定第二信息。因此,第一信息也可以称为触发信息,或称为请求信息等,对于信息的名称不做限制。第二信息可以用于第一终端装置确定向第三终端装置发送数据的时频资源。
在本申请实施例中,第一终端装置向第三终端装置发送数据前,可以先触发第三终端装置进行资源辅助流程,再根据第三终端装置反馈的第二信息来选择用于向第三终端装置发送数据的时频资源。为了获得来自第三终端装置的第二信息,第一终端装置可以先向第三终端装置发送第一信息,以触发第三终端装置确定第二信息。
在前文介绍了,例如第一终端装置选择了第七时频资源来发送第一信息,那么在S62中,第一终端装置可以通过第七时频资源向第三终端装置发送第一信息,第三终端装置也可以在第七时频资源接收来自第一终端装置的第一信息。
一个终端装置在发送侧行信息时,一般都会发送第一级SCI(1st-stage SCI)和第二级SCI(2nd-stage SCI),还可能发送数据(data),对此可以理解为,终端装置在发送侧行信息时可以只发送控制信息(第一级SCI和第二级SCI),或者只发送数据,或者也可以发送第一级SCI、第二级SCI和数据。其中,第一级SCI例如在控制信道发送,第二级SCI例如在数据信道发送。该第一级SCI用于调度该第二级SCI和该数据。第二级SCI也用于调度该数据,例如第二级SCI包括至少源地址(source ID),控制信道例如为物理侧行控制信道(physical sidelink control channel,PSCCH),数据信道例如为物理侧行共享信道(physical sidelink shared channel,PSSCH)。另外,第一级SCI可以指示用于发送第二级SCI的时频资源,包括指示用于确定第二级SCI的码率信息。那么,第一终端装置可以将第一信息包括在其中的一个SCI中发送给第三终端装置。第一级SCI一般为广播信息,所有终端装置都需对第一级SCI进行接收和译码。具体地,对于需要进行侦听和用户自主资源选择的终 端装置,所述第一级SCI包括了用于行侦听和用户自主资源选择的控制信息,例如时频资源信息,优先级信息,或体现数据业务周期的周期性时频资源信息等信息中的一种或多种。第二级SCI可以有不同的格式,例如,包含不同的控制信息字段用于不同的传输,比如用于基于地理位置的组播等。所以,对于不同标准版本的终端装置或者支持不同功能的终端装置所需要的控制信息只承载于在第二级SCI中,而第一级SCI为所有终端装置(例如包括不同标准版本的终端装置(例如第三代合作伙伴计划(3rd generation partnership project,3GPP)版本Rel-16终端装置,3GPP Rel-17终端装置),支持基于地理位置的组播的终端装置,或支持资源辅助的终端装置中的一种或多种)所需要的公共信息,包括用于侦听和用户自主资源选择的控制信息,那么所述的所有终端装置则可以在一个资源池中共存,因为排除时频资源时是根据第一级SCI进行排除的,所述的所有终端装置都可以通过检测所述第一级SCI来相互排除不可用的资源,降低资源冲突的概率,提升资源利用率。
因此,作为发送第一信息的一种可选的实施方式,第一终端装置可以将第一信息包括在第二级SCI中发送。例如,第一终端装置向第三终端装置发送第一控制信息,第三终端装置接收来自第一终端装置的第一控制信息。第一控制信息可以包括第一SCI和第二SCI,第一SCI为第一级SCI,第二SCI为第二级SCI。第二SCI就可以包括第一信息。
可选的,第一SCI可以包括第一字段,第一字段可以指示第一SCI所调度的第二级SCI包括第一信息。第一SCI所调度的第二级SCI,也就是第二SCI。也就是说,第一字段可以指示第二SCI包括第一信息。第一SCI是第一级SCI,是通过广播方式发送的,接收第一SCI的终端装置如果能够识别第一字段,则可以确定第二SCI包括第一信息。例如第三终端装置接收了第一SCI和第二SCI,且能识别第一字段,则第三终端装置就可以明确第二SCI包括了第一信息,第三终端装置在对第二SCI进行解析时就会从中获得第一信息。通过这种方式使得第三终端装置能够识别第二SCI的格式,从而能够正确获得第一信息。可选地,第一SCI中的优先级信息可以是要向第三终端装置发送数据的优先级信息,也可以是与第一SCI对应的/调度的数据的优先级。
可选的,第二SCI还可以包括以下一种或多种信息:层一(layer 1,L1)源标识(source ID),L1目标标识(destination ID),第一终端装置的地理位置信息,或通信范围信息。例如,第二SCI包括L1源标识;或者,第二SCI包括L1目标标识;或者,第二SCI包括第一终端装置的地理位置信息;或者,第二SCI包括通信范围信息;或者,第二SCI包括L1源标识和L1目标标识;或者,第二SCI包括L1源标识、L1目标标识和第一终端装置的地理位置信息;或者,第二SCI包括L1源标识、L1目标标识、第一终端装置的地理位置信息和通信范围信息,等等。
L1源标识用于指示第一终端装置,L1目标标识用于指示第三终端装置。或者,L1源标识和L1目标标识可用于指示第一终端装置向第三终端装置发送的数据(包括但不限于该数据所属的业务),则第一终端装置和第三终端装置可以根据L1源标识和L1目标标识来确定当前的通信是否与自身相关。
第一终端装置的地理位置信息,可以为区域标识信息(Zone ID)或其他地理位置相关的信息,用于标识第一终端装置的地理位置;通信范围信息用于指示第一终端装置所发送的控制和/或数据所要求的通信范围。
那么,第三终端装置在接收及译码第二SCI后,根据第一终端装置的地理位置信息和通信范围信息,可以判断是否对来自第一终端装置的控制信息或数据等做出响应。例如第 三终端装置判断来自第一终端装置的控制信息和/或数据不满足第二SCI所包括的通信范围信息的要求(例如通信范围为100m),那么第三终端装置可以不对来自第一终端装置的信息(控制信息和/数据)做出响应,例如不向第一终端装置发送第二信息;反之,第三终端装置可以对来自第一终端装置的信息(控制信息和/数据)做出响应,例如向第一终端装置发送第二信息。如果来自第一终端装置的信息不满足通信范围信息的要求,表明第一终端装置和第三终端装置距离较远,在这种情况下,可能即使第三终端装置向第一终端装置发送了第二信息,对于第一终端装置的发送过程来说帮助也不大,因此第三终端装置可以不必向第一终端装置发送第二信息。通过这种方式可以减小信令开销。
为了提高第一信息的发送成功率,作为一种可选的实施方式,第一信息还可以重复发送,即,在n+t a_1之后的时隙上还可以再发送第一信息。如果第一终端装置会重复发送第一信息,则用于重复发送第一信息的时频资源可以通过第一SCI指示,从而第三终端装置能够正确接收重复发送的第一信息。例如,第一终端装置在第七时频资源向第三终端装置发送第一信息之后,还可以在第六时频资源向第三终端装置重传第一信息,第一SCI可以指示第六时频资源。从而第三终端装置根据第一SCI的指示,就可以在第六时频资源接收来自第一终端装置的重传的第一信息。另外,本申请实施例对于第一信息重复发送的次数不作限制。可参考图7,为第一信息重复发送的示意图。例如,第一终端装置在时隙n触发进行资源选择,第一终端装置根据在侦听窗[n-t 0,n-t proc,0)内的侦听结果,在资源选择窗[n+t 1,n+t 2]内的时隙n+t a_1通过第二级SCI(图7中从左至右的第一个SCI-2)向第三终端装置发送第一信息,例如在时隙n+t a_1发送的第一级SCI(图7中从左至右的第一个SCI-1)还指示了重复发送第一信息的时频资源,该时频资源的时域位置为时隙n+t a_2,则第一终端装置在时隙n+t a_2通过第二级SCI(图7中从左至右的第二个SCI-2)向第三终端装置重复发送第一信息。图7中的时隙n+t a,例如为第三终端装置向第一终端装置发送第二信息的时域位置。另外,图7中的数据,可能发送,也可能不发。
第一信息可以用于触发第三终端装置确定第二信息,在确定第二信息后,第三终端装置可以将该第二信息发送给第一终端装置,这就涉及到第三终端装置需要确定用于发送第二信息的时频资源。作为一种可选的实施方式,第一信息还可以指示第四时频资源,第四时频资源可以是第一终端装置根据第一终端装置的侦听结果确定的,第四时频资源可以用于第三终端装置确定发送第二信息的时频资源。例如,第四时频资源是第一终端装置根据侦听结果确定的可用的时频资源,此时第四时频资源可以理解为推荐资源,表明第一终端装置在第四时频资源上接收数据时受到的其他终端装置的干扰可以满足接收条件,即不影响接收可靠性的达标,或者说,是表明第一终端装置在第四时频资源上接收数据时受到的其他终端装置的干扰较小。因此,第一终端装置推荐第三终端装置使用第四时频资源向第一终端装置发送第二信息。或者,第四时频资源是第一终端装置根据侦听结果确定的不可用的时频资源,表明第一终端装置在第四时频资源上接收数据时受到的其他终端装置的干扰无法满足接收条件,即会影响接收可靠性的达标,或者说,是表明第一终端装置在第四 时频资源上接收数据时受到的其他终端装置的干扰较大。在这种情况下,第一信息指示第四时频资源,可以认为是指示第三终端装置尽量不使用第四时频资源发送第二信息。
例如,第四时频资源可以包括时域资源,或包括频域资源,或包括时域资源和频域资源。其中,所述的时域资源可以包括1个或多个时隙,所述的频域资源可以包括1个或多个子信道(subchannel)。
或者,作为另一种可选的实施方式,第一信息也可以不指示第四时频资源,而是由第一SCI来指示用于发送第二信息的时频资源。例如,第一SCI可以指示第五时频资源,第五时频资源可以是第一终端装置根据第一终端装置的侦听结果确定的,第五时频资源可以用于发送第二信息。第五时频资源是第一终端装置根据侦听结果确定的可用的时频资源,表明第一终端装置在第五时频资源上接收数据时受到的其他终端装置的干扰可以满足接收条件,即不影响接收可靠性的达标,或者说,是表明第一终端装置在第五时频资源上接收数据时受到的其他终端装置的干扰较小。因此,第一终端装置指示第三终端装置使用第五时频资源向第一终端装置发送第二信息。在这种情况下,第三终端装置无需再根据其他因素(例如第三终端装置的侦听结果等)确定用于发送第二信息的时频资源,直接确定第五时频资源为用于发送第二信息的时频资源即可。也就是说,第一终端装置通过第一级SCI预约了用于第三终端装置发送第二信息的时频资源。可参考图8,第一终端装置在时隙n+t a_1向第三终端装置发送第一SCI(即图8中的SCI-1),第一SCI包括第五时频资源的信息,例如第五时频资源的时域位置为时隙n+t a。图8中的数据,可能发送也可能不发送。
如果第一信息指示第四时频资源,第三终端装置还可以根据第三终端装置的侦听结果和第四时频资源来共同确定用于发送第二信息的时频资源。在这种情况下,第三终端装置对于发送第二信息的时频资源的选择既考虑了第三终端装置的接收情况,又考虑了第三终端装置对于资源的侦听情况,使得所选择的时频资源更为合适。而如果第一SCI指示第五时频资源,则第五时频资源是第一终端装置已预约的用于第三终端装置发送第二信息的时频资源。在这种情况下,第三终端装置直接在第五时频资源发送第二信息即可,无需再根据其他因素来确定用于发送第二信息的时频资源。这种方式可以简化第三终端装置的操作过程,加快第三终端装置发送第二信息的过程,从而可以减小第一数据的时延。
另外,可选地,第一信息还可以包括用于指示第一数据的数据包大小的信息。因为第二信息可以用于确定向第三终端装置发送数据的时频资源,也就是说,第二信息可以指示相应的时频资源,那么第三终端装置确定第二信息时也可以根据第三终端装置的侦听结果来确定。而第三终端装置根据侦听结果进行资源排除时,可以根据第一数据的数据包大小来进行,因此第一终端装置可以将第一数据的数据包大小的信息告知第三终端装置,以便第三终端装置进行资源排除。例如,第一数据的数据包大小可以包括第一数据占用的子信道的大小,即第一数据占用多少个子信道。例如将第一数据占用的全部子信道的个数记为L sub。例如,第三终端装置根据侦听结果进行资源排除时,可以根据承载第一数据的PSSCH所占用的子信道的大小来进行,因此第一终端装置可以将第一数据占用的子信道的大小的信息告知第三终端装置。例如承载第一数据的PSSCH占据2个子信道,那么第三终端装置在根据侦听结果进行资源排除时,可以根据2个子信道的大小来进行资源排除,而无需根据其他的大小(例如1个子信道或3个子信道等)进行资源排除。又例如,第一数据的数据包大小可以包括第一数据对应的传输块(transport block,TB)大小(size),第三终端 装置可以根据该TB size进行资源排除。或者,第一数据的数据包大小还可以包括其他的信息。
在S62中,第一终端装置向第三终端装置发送第一信息,以触发第三终端装置进行资源辅助流程。在这种方式下,第一终端装置可以在有需求时再触发第三终端装置进行资源辅助流程,可以减少第一终端装置接收的冗余信息,且方式较为灵活。而且第一终端装置还可以将第一数据的数据包大小告知第三终端装置,从而使得第三终端装置通过第二信息所指示的第二时频资源与第一数据更为相符,资源辅助流程可以更为精确。资源辅助流程可以为S63到S64步骤中所记载的第三终端装置对其周围的终端装置进行侦听,即检测周围终端装置的侧行控制信息,并根据检测的结果确定第二信息的过程。
或者在本申请实施例中,第三终端装置也可以主动进行资源辅助流程,而无需第一终端装置的触发,即无须接收来自第一终端装置的第一信息即可进行资源辅助流程,在这种情况下可以无需执行S62,即,第一终端装置无需向第三终端装置发送第一信息,而第三终端装置可以主动发送第二信息。因此,S62是可选的步骤,不是必须执行的,在图6中用虚线表示。例如第三终端装置可以周期性地发送第二信息,第三终端装置发送第二信息的方式例如为广播方式或组播方式等,第三终端装置周围的一个或多个终端装置可以接收来自第三终端装置的第二信息。如果有需要向第三终端装置发送数据的终端装置(例如第一终端装置),在接收第二信息后就可以根据第二信息来确定用于向第三终端装置发送数据的资源。在这种方式下,无需第一终端装置发送信息来触发第三终端装置,第三终端装置可以主动进行资源辅助流程,有助于节省第一终端装置和第三终端装置之间的信令开销。
在前文介绍了,如果第一终端装置向第三终端装置发送第一信息,那么第一信息可以包括用于指示第一数据的数据包大小的信息,第三终端装置根据侦听结果进行资源排除时,可以根据第一数据的数据包大小来进行。而如果第一终端装置不向第三终端装置发送第一信息,则第三终端装置无法获知究竟哪个终端装置会向第三终端装置发送数据,也无法获知待发送的数据的数据包大小。那么第三终端装置在进行资源排除时,可根据一种或多种数据包大小来进行。例如,一个数据的数据包大小包括该数据占用的子信道的大小,即该数据占用多少个子信道。那么第三终端装置根据侦听结果进行资源排除时,可以根据一种或多种子信道的大小来进行。例如可以在第三终端装置中预配置一种或多种子信道的大小,或者第三终端装置可以确定第三终端装置历史接收或发送的数据占用的一种或多种子信道的大小,从而第三终端装置可以根据一种或多种子信道的大小来进行资源排除。例如在第三终端装置中预配置了3种子信道的大小,分别为1个子信道、2个子信道和3个子信道,则第三终端装置在根据侦听结果进行资源排除时,可以根据1个子信道的大小来进行资源排除,得到资源排除结果1,根据2个子信道的大小来进行资源排除,得到资源排除结果2,以及根据3个子信道的大小来进行资源排除,得到资源排除结果3。如果是这种情况,第三终端装置可能所确定的第二时频资源可能包括至少一个时频资源,这至少一个时频资源可能包括第一部分时频资源、第二部分时频资源或第三部分时频资源中的一项或多项。其中,第一部分时频资源包括第三终端装置根据资源排除结果1确定的全部或部分时频资源,第二部分时频资源包括第三终端装置根据资源排除结果2确定的全部或部分时频资源,第三部分时频资源包括第三终端装置根据资源排除结果3确定的全部或部分时频资源。
S63、第三终端装置检测来自至少一个第四终端装置的侧行控制信息,以确定第二时 频资源,第二时频资源可以用于确定向第三终端装置发送数据的时频资源。其中,至少一个第四终端装置可以包括第一终端装置,也可以不包括第一终端装置。
例如第三终端装置在时隙n+t a_1接收第一信息,则第三终端装置可以进行侦听(或者说,检测),即,第三终端装置检测来自至少一个第四终端装置的SCI。例如第三终端装置在资源侦听窗[n+t a_1-t 0,n+t a_1-t proc,0)检测来自至少一个第四终端装置的SCI,获得侦听结果,并根据该侦听结果在资源选择窗
Figure PCTCN2020086803-appb-000001
内选择时频资源,其中t 2≤t′ 2<剩余的PDB。如果第三终端装置接收的第一信息指示第四时频资源,则第三终端装置可以根据第三终端装置的侦听结果和第四时频资源确定用于发送第一信息的时频资源,另外还可以根据该侦听结果确定第二信息所指示的时频资源,也就是第二时频资源;或者,如果第三终端装置接收的第一信息不指示第四时频资源,而是第三终端装置接收的第一SCI指示第五时频资源,则第三终端装置可以确定通过第五时频资源发送第二信息,第三终端装置可以根据第三终端装置的侦听结果确定第二时频资源。
下面简单介绍第三终端装置根据第三终端装置的侦听结果和第四时频资源确定用于发送第二信息的时频资源的方式,首先介绍第四时频资源是第一终端装置认为的可用的时频资源的情况,即,第一终端装置推荐第三终端装置使用第四时频资源发送第二信息。
如果第三终端装置根据对来自至少一个第四终端装置的侧行控制信息的检测,确定第四时频资源未被排除使用,即,第四时频资源对于第三终端装置来说是可用的时频资源,则第三终端装置可以确定通过第四时频资源发送第二信息。
或者,如果第三终端装置根据对来自至少一个第四终端装置的侧行控制信息的检测,确定第四时频资源被排除使用,即,第四时频资源对于第三终端装置来说是不可用的时频资源,则第三终端装置可以确定第二数据的优先级是否高于第一优先级门限。如果第二数据的优先级高于第一优先级门限,则第三终端装置可以从根据第三终端装置的侦听结果所确定的未被排除使用的时频资源(即,可用的时频资源)中选择用于发送第二信息的时频资源;或者,如果第二数据的优先级低于或等于第一优先级门限,则第三终端装置可以确定通过第四时频资源发送第二信息。其中,第二数据是预约了第四时频资源的第四终端装置待通过第四时频资源所发送的数据,第二数据的优先级可以是通过第三终端装置接收的来自该第四终端装置的第一级SCI指示的。即,既然第四时频资源对于第三终端装置来说是不可用的时频资源,表明第三终端装置通过侦听确定第四时频资源已经被其他终端装置所预约,那么第二数据就是该其他终端装置预约第四时频资源所要发送的数据。所述的第一优先级门限可以是第三终端装置确定的,或者是第一终端装置和第三终端装置协商确定的,或者可以是网络设备配置的,或者也可以是协议规定的。
或者,如果第三终端装置根据对来自至少一个第四终端装置的侧行控制信息的检测,确定第四时频资源被排除使用,即,第四时频资源对于第三终端装置来说是不可用的时频资源,则第三终端装置可以确定第二数据的优先级是否高于第一数据的优先级。如果第二数据的优先级高于第一数据的优先级,则第三终端装置可以从根据第三终端装置的侦听结果所确定的未被排除使用的时频资源(即,可用的时频资源)中选择用于发送第二信息的时频资源;或者,如果第二数据的优先级低于或等于第一数据的优先级,则第三终端装置 可以确定通过第四时频资源发送第二信息。关于第二数据及第二数据的优先级等内容的解释可参考上一段落。
第四时频资源还有可能是第一终端装置认为的不可用的时频资源的情况,即,第一终端装置指示第三终端装置尽量不使用第四时频资源发送第二信息。如果是这种情况,则第三终端装置在确定用于发送第二信息的时频资源时,如果根据对来自至少一个第四终端装置的SCI的检测,确定第四时频资源被排除使用,则第三终端装置可以从根据第三终端装置的侦听结果所确定的未被排除使用的时频资源(即,可用的时频资源)中选择用于发送第二信息的时频资源;而如果根据对来自至少一个第四终端装置的侧行控制信息的检测,确定第四时频资源未被排除使用,则第三终端装置可以从根据第三终端装置的侦听结果所确定的未被排除使用的时频资源(即,可用的时频资源)中选择用于发送第二信息的时频资源,且不选择第四时频资源。
这里只是对第三终端装置选择用于发送第二信息的时频资源的方式的几种举例,本申请实施例不限制第三终端装置还可以使用其他方式选择用于发送第二信息的时频资源。
第二信息可以指示第二时频资源。例如第二时频资源是第三终端装置通过检测来自至少一个第四终端装置的SCI所确定的可用的时频资源,也就是说,第二时频资源包括可用于向第三终端装置发送数据的时频资源,在这种情况下第二时频资源可以理解为推荐资源,表明第三终端装置在第二时频资源上接收数据时受到的其他终端装置的干扰可以满足接收条件,即不影响接收可靠性的达标,或者说,是表明第三终端装置在第二时频资源上接收数据时受到的其他终端装置的干扰较小。因此,第三终端装置推荐第一终端装置使用第二时频资源向第三终端装置发送数据。或者,第二时频资源是第三终端装置通过检测来自至少一个第四终端装置的SCI所确定的不可用的时频资源,也就是说,第二时频资源包括不可用于向第三终端装置发送数据的时频资源,表明第三终端装置在第二时频资源上接收数据时受到的其他终端装置的干扰无法满足接收条件,即会影响接收可靠性的达标,或者说,是表明第三终端装置在第二时频资源上接收数据时受到的其他终端装置的干扰较大。因此,第三终端装置指示第一终端装置尽量不使用第二时频资源向第三终端装置发送数据。
例如,第二时频资源可以包括时域资源,或包括频域资源,或包括时域资源和频域资源。其中,所述的时域资源可以包括1个或多个时隙,所述的频域资源可以包括1个或多个子信道。
S64、第三终端装置向第一终端装置发送第二信息,第一终端装置接收来自第三终端装置的第二信息。在本申请实施例中,第二信息是用作资源辅助流程的,因此第二信息也可以称为辅助信息,或者第二信息还可以有其他名称,名称不构成对于技术特征的限制。
第三终端装置确定了用于发送第二信息的时频资源,以及确定了第二信息所指示的第二时频资源,就可以向第一终端装置发送第二信息。第二信息可以指示第二时频资源,第二时频资源用于确定向第三终端装置发送数据的时频资源。
为了保证第一终端装置向第三终端装置发送的第一数据对于时延的要求,第三终端装置选择的用于发送第二信息的时频资源所在的时隙需要在时隙n+t 2之前,对此可参考图9。图9中,第三终端装置在时隙n+t a_1接收来自第一终端装置的第一信息,从而被触发进行资源选择,则第三终端装置进行资源侦听,也就是对来自至少一个第四终端装置的SCI进行检测。第三终端装置在进行资源排除时,可以排除被其他终端装置预约用来发送数据 的时频资源,或排除被其他终端装置预约用来发送控制信息的时频资源,或排除被其他终端装置预约用来发送数据的时频资源以及被其他终端装置预约用来发送控制信息的时频资源。其中,如果第三终端装置在时隙n+t a_1接收第一信息失败,则第三终端装置可以在时隙n+t a_2上接收来自第一终端装置的重传的第一信息,则第三终端装置在时隙n+t a_2也会被触发进行资源侦听,即,第三终端装置在每次接收第一信息时,就可以触发进行资源侦听。如果第三终端装置侦听了多次,且侦听结果一致,则可按照该侦听结果进行资源排除等;或者,如果第三终端装置侦听了多次,且侦听结果不一致,则第三终端装置进行资源排除等操作时可以以最近一次接收的第一信息所触发的资源侦听过程为准。但图9中对于第一信息的重传并未示出,即,图9并未示意时隙n+t a_2。图9中的n+t a_2是表示第三终端装置向第一终端装置发送第二信息的时域位置。第三终端装置在资源侦听窗[n+t a_1-t 0,n+t a_1-t proc,0)内,以第一信息所占用的子信道个数的频域大小进行侦听(第一信息所占用的子信道个数可以是配置、预配置或预先定义的,例如第一信息所占用的子信道个数为1)。例如第一信息还指示第四时频资源,则第三终端装置根据第三终端装置的侦听结果和第四时频资源,在资源选择窗[n+t a_1+t 1,n+t′ 2]内确定用于发送第二信息的时频资源。例如第三终端装置选择了在时隙n+t a_2发送第二信息,第二信息指示第二时频资源,第二时频资源例如为第三终端装置在资源侦听[n+t a_1-t 0,n+t a_1-t proc,0)内以L sub的频域大小进行侦听所确定的可用的时频资源,例如第二时频资源的时域位置为时隙n+t a,在频域起始子信道位置和长度为L sub
在前文介绍了,第一级SCI一般为广播信息,所有终端装置都需对第一级SCI进行接收和译码。具体地,对于需要进行侦听和用户自主资源选择的终端装置,所述第一级SCI包括了用于行侦听和用户自主资源选择的控制信息,例如时频资源信息,优先级信息,或体现数据业务周期的周期性时频资源信息等信息中的一种或多种。第二级SCI可以有不同的格式,例如,包含不同的控制信息字段用于不同的传输,比如用于基于地理位置的组播等。所以,对于不同标准版本的终端装置或者支持不同功能的终端装置所需要的控制信息只承载于在第二级SCI中,而第一级SCI为所有终端装置(例如包括不同标准版本的终端装置(例如3GPP Rel-16终端装置,3GPP Rel-17终端装置),支持基于地理位置的组播的终端装置,或支持资源辅助的终端装置中的一种或多种)所需要的公共信息,包括用于侦听和用户自主资源选择的控制信息,那么所述的所有终端装置则可以在一个资源池中共存,因为排除时频资源时是根据第一级SCI进行排除的,所述的所有终端装置都可以通过检测所述第一级SCI来相互排除不可用的资源,降低资源冲突的概率,提升资源利用率。
因此,作为发送第二信息的一种可选的实施方式,第三终端装置可以将第二信息包括在第二级SCI中发送。例如,第三终端装置向第一终端装置发送第二控制信息,第一终端装置接收来自第三终端装置的第二控制信息。第二控制信息可以包括第三SCI和第四SCI,第三SCI为第一级SCI,第四SCI为第二级SCI。第四SCI就可以包括第二信息。
可选的,第三SCI可以包括第二字段,第二字段可以指示第三SCI所调度的第二级SCI包括第二信息。第三SCI所调度的第二级SCI,也就是第四SCI。也就是说,第二字段可以指示第四SCI包括第二信息。第三SCI是第一级SCI,是通过广播方式发送的,接收第三SCI的终端装置如果能够识别第二字段,则可以确定第四SCI包括第二信息。例如第三终端装置接收了第三SCI和第四SCI,且能识别第二字段,则第三终端装置就可以明确第四SCI包括了第二信息,第三终端装置在对第二SCI进行解析时就会从中获得第二信息。通过这种方式使得第三终端装置能够识别第四SCI的格式,从而能够正确获得第二信息。
S65、第一终端装置根据第二时频资源和第一时频资源,确定第三时频资源。或者,第一终端装置确定第二时频资源为第三时频资源。其中,第三时频资源是用于第一终端装置向第三终端装置发送数据的时频资源。
作为一种可选的实施方式,如果第二信息指示的第二时频资源包括可用于向第三终端装置发送数据的时频资源,那么第一终端装置可以直接确定通过第二时频资源向第三终端装置发送数据,即,第一终端装置在确定向第三终端装置发送数据的时频资源时无需再考虑其他因素(例如第一终端装置的侦听结果等),而是确定第二时频资源为第三时频资源。对于第一终端装置来说实现较为简单,简化了操作过程,也能加快第一数据的发送,减小第一数据的时延。
或者,如果第二信息指示的第二时频资源包括可用于向第三终端装置发送数据的时频资源,则第一终端装置可以根据第二时频资源和第一时频资源确定第三时频资源。
或者,作为再一种可选的实施方式,无论第二信息指示的第二时频资源包括的是可用于向第三终端装置发送数据的时频资源还是不可用于向第三终端装置发送数据的时频资源,第一终端装置都根据第二时频资源和第一时频资源确定第三时频资源,而不是直接确定第二时频资源为第三时频资源。
下面简单介绍第一终端装置根据第二时频资源和第一时频资源确定第三时频资源的方式,首先介绍第二时频资源包括可用于向第三终端装置发送数据的时频资源的情况。
如果第一终端装置根据对来自至少一个第二终端装置的SCI的检测,确定第二时频资源未被排除使用,即,第二时频资源对于第一终端装置来说也是可用的时频资源,则第一终端装置可以确定通过第二时频资源发送数据,此时第二时频资源和第三时频资源为同一时频资源。
或者,如果第一终端装置根据对来自至少一个第二终端装置的SCI的检测,确定第二时频资源被排除使用,即,第二时频资源对于第一终端装置来说是不可用的时频资源,则第一终端装置可以确定第三数据的优先级是否高于第二优先级门限。如果第三数据的优先级高于第二优先级门限,则,如果第一时频资源包括可用于向第三终端装置发送数据的时频资源,第一终端装置可以确定第一时频资源为第三时频资源,或者,如果第一时频资源包括不可用于向第三终端装置发送数据的时频资源,第一终端装置可以从根据对来自至少一个第二终端装置的SCI的检测所确定的未被排除使用的时频资源(即,可用的时频资源)中选择第三时频资源;或者,如果第三数据的优先级低于或等于第二优先级门限,则第一终端装置可以确定通过第二时频资源发送数据,此时第二时频资源和第三时频资源为同一时频资源。其中,第三数据是预约了第二时频资源的第二终端装置待通过第二时频资源所发送的数据,第三数据的优先级可以是通过第一终端装置接收的来自该第二终端装置的第一级SCI指示的。即,既然第二时频资源对于第一终端装置来说是不可用的时频资源,表 明第一终端装置通过侦听确定第二时频资源已经被其他终端装置所预约,那么第三数据就是该其他终端装置预约第二时频资源所要发送的数据。所述的第二优先级门限可以是第一终端装置确定的,或者是第一终端装置和第三终端装置协商确定的,或者可以是网络设备配置的,或者也可以是协议规定的。
或者,如果第一终端装置根据对来自至少一个第二终端装置的SCI的检测,确定第二时频资源被排除使用,即,第二时频资源对于第一终端装置来说是不可用的时频资源,则第一终端装置可以确定第三数据的优先级是否高于第一数据的优先级。如果第三数据的优先级高于第一数据的优先级,则,如果第一时频资源包括可用于向第三终端装置发送数据的时频资源,第一终端装置可以确定第一时频资源为第三时频资源,或者,如果第一时频资源包括不可用于向第三终端装置发送数据的时频资源,第一终端装置可以从根据对来自至少一个第二终端装置的SCI的检测所确定的未被排除使用的时频资源(即,可用的时频资源)中选择第三时频资源;或者,如果第三数据的优先级低于或等于第一数据的优先级,则第一终端装置可以确定通过第二时频资源发送数据,此时第二时频资源和第三时频资源为同一时频资源。关于第三数据及第三数据的优先级等内容的解释可参考上一段落。
另外,第二时频资源也有可能包括不可用于向第三终端装置发送数据的时频资源。如果是这种情况,则第一终端装置在确定用于发送数据的时频资源时,如果根据对来自至少一个第二终端装置的SCI的检测,确定第二时频资源被排除使用,则,如果第一时频资源包括可用于向第三终端装置发送数据的时频资源,第一终端装置可以确定第一时频资源为第三时频资源,或者,如果第一时频资源包括不可用于向第三终端装置发送数据的时频资源,第一终端装置可以从根据对来自至少一个第二终端装置的SCI的检测所确定的未被排除使用的时频资源(即,可用的时频资源)中选择第三时频资源;或者,如果根据对来自至少一个第二终端装置的SCI的检测,确定第二时频资源未被排除使用,则,如果第一时频资源包括可用于向第三终端装置发送数据的时频资源,第一终端装置可以确定第一时频资源为第三时频资源,或者,如果第一时频资源包括不可用于向第三终端装置发送数据的时频资源,第一终端装置可以从根据对来自至少一个第二终端装置的SCI的检测所确定的未被排除使用的时频资源(即,可用的时频资源)中选择第三时频资源,且不选择第二时频资源作为第三时频资源。
这里只是对第一终端装置选择用于发送数据的时频资源的方式的几种举例,本申请实施例不限制第一终端装置还可以使用其他方式选择用于发送数据的时频资源。
S66、第一终端装置通过第三时频资源向第三终端装置发送第一数据,第三终端装置通过第三时频资源接收来自第一终端装置的第一数据。
本申请实施例以第一终端装置向第三终端装置发送第一数据为例,但实际发送的可能是控制信息,或数据,或控制信息和数据。如果发送的是控制信息,或控制信息和数据,则本申请实施例的方法也是适用的。
例如可参考图10,第三终端装置在资源侦听窗[n+t a_1-t 0,n+t a_1-t proc,0)内进行侦听,以确定第二时频资源。第三终端装置在资源选择窗[n+t a_1+t 1,n+t′ 2]内的时隙n+t a上接收来自第一终端装置的第一数据,第一数据通过PSSCH承载,时隙n+t a是第三时频资源的时域位置。
作为一种可选的实施方式,第一终端装置所发送的第一信息,和第三终端装置所发送的第二信息,这两种信息可以使用相同的控制信息格式,即,承载第一信息的第二SCI和 承载第二信息的第四SCI的大小相同,其中的某些字段在一些情况下的取值定义为0,或者某些字段不存在可以由预约比特来填充,进而保证第二SCI和第四SCI的大小一样,这样可以尽量避免定义新的第二级SCI的格式,进而减少指示不同的第二级SCI的格式的信令开销。
另外,第一信息也可以不包括在第二SCI中,例如承载于媒体接入控制(media access control,MAC)控制元素(control element,CE)中,和/或,第二信息也可以不包括在第四SCI中,例如承载于MAC CE中。上述的流程不会发生变化。
在本申请实施例中,第一终端装置可以根据第三终端装置的侦听结果来选择用于向第三终端装置发送数据的时频资源,或者可以根据第一终端装置的侦听结果和第三终端装置的侦听结果来一并选择用于向第三终端装置发送数据的时频资源,解决了第一终端装置的侦听结果不完整而导致的所选择的时频资源可能被其他终端装置干扰或者误判断的问题,进而可以降低资源选择冲突的概率,提升传输可靠性和系统资源的利用率。
下面结合附图介绍本申请实施例中用来实现上述方法的装置。因此,上文中的内容均可以用于后续实施例中,重复的内容不再赘述。
图11为本申请实施例提供的通信装置1100的示意性框图。示例性地,通信装置1100例如为第一终端装置1100。
第一终端装置1100包括处理模块1110和收发模块1120。示例性地,第一终端装置1100可以是终端设备,也可以是应用于终端设备中的芯片或者其他具有上述终端设备功能的组合器件、部件等。当第一终端装置1100是终端设备时,收发模块1120可以是收发器,收发器可以包括天线和射频电路等,处理模块1110可以是处理器,例如基带处理器,基带处理器中可以包括一个或多个中央处理单元(central processing unit,CPU)。当第一终端装置1100是具有上述终端设备功能的部件时,收发模块1120可以是射频单元,处理模块1110可以是处理器,例如基带处理器。当第一终端装置1100是芯片系统时,收发模块1120可以是芯片(例如基带芯片)的输入输出接口、处理模块1110可以是芯片系统的处理器,可以包括一个或多个中央处理单元。应理解,本申请实施例中的处理模块1110可以由处理器或处理器相关电路组件实现,收发模块1120可以由收发器或收发器相关电路组件实现。
例如,处理模块1110可以用于执行图6所示的实施例中由第一终端装置所执行的除了收发操作之外的全部操作,例如S61和S65,和/或用于支持本文所描述的技术的其它过程。收发模块1120可以用于执行图6所示的实施例中由第一终端装置所执行的全部收发操作,例如S62、S64和S66,和/或用于支持本文所描述的技术的其它过程。
另外,收发模块1120可以是一个功能模块,该功能模块既能完成发送操作也能完成接收操作,例如收发模块1120可以用于执行图6所示的实施例中由第一终端装置所执行的全部发送操作和接收操作,例如,在执行发送操作时,可以认为收发模块1120是发送模块,而在执行接收操作时,可以认为收发模块1120是接收模块;或者,收发模块1120也可以是两个功能模块,收发模块1120可以视为这两个功能模块的统称,这两个功能模块分别为发送模块和接收模块,发送模块用于完成发送操作,例如发送模块可以用于执行图6所示的实施例的任一个实施例中由第一终端装置所执行的全部发送操作,接收模块用于完成接收操作,例如接收模块可以用于执行图6所示的实施例由第一终端装置所执行的全部接收操作。
其中,处理模块1110,用于检测来自至少一个第二终端装置的侧行控制信息,以确定 第一时频资源,所述至少一个第二终端装置包括第三终端装置,所述第一时频资源包括不可用于向所述第三终端装置发送数据的时频资源;
收发模块1120,用于向所述第三终端装置发送第一信息,所述第一信息用于触发确定第二信息;
收发模块1120,还用于接收来自所述第三终端装置的所述第二信息,所述第二信息用于指示第二时频资源,所述第二时频资源用于确定向第三终端装置发送数据的时频资源;
处理模块1110,还用于根据所述第一时频资源和所述第二时频资源确定第三时频资源;
收发模块1120,还用于通过所述第三时频资源向所述第三终端装置发送第一数据。
作为一种可选的实施方式,收发模块1120用于通过如下方式向所述第三终端装置发送第一信息:
向所述第三终端装置发送第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
作为一种可选的实施方式,所述第一信息还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
作为一种可选的实施方式,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
作为一种可选的实施方式,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
作为一种可选的实施方式,收发模块1120,还用于在第六时频资源向所述第三终端装置重传所述第一信息,所述第六时频资源由所述第一SCI指示。
作为一种可选的实施方式,收发模块1120用于通过如下方式接收来自所述第三终端装置的所述第二信息:
接收来自所述第三终端装置的第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
作为一种可选的实施方式,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
作为一种可选的实施方式,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,所述第一数据的数据包大小用于确定所述第二时频资源。
作为一种可选的实施方式,所述第三时频资源为所述第二时频资源,收发模块1120用于通过如下方式通过所述第三时频资源向所述第三终端装置发送第一数据:
通过所述第二时频资源向所述第三终端装置发送所述第一数据。
作为一种可选的实施方式,
处理模块1110用于检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,还用于检测来自所述至少一个第二终端装置的侧行控制信息,以确定第七时频资源,所述第七时频资源是根据所述检测的侧行控制信息确定的可用的时频资源中在时域上最早的时频资源;
收发模块1120用于通过如下方式向所述第三终端装置发送第一信息:通过所述第七时频资源向所述第三终端装置发送所述第一信息。
作为一种可选的实施方式,
所述第二时频资源包括可用于向所述第三终端装置发送数据的时频资源;或,
所述第二时频资源包括不可用于向所述第三终端装置发送数据的时频资源。
关于第一终端装置1100所能实现的其他功能,可参考图6所示的实施例的相关介绍,不多赘述。
图12为本申请实施例提供的通信装置1200的示意性框图。示例性地,通信装置1200例如为第三终端装置1200。
第三终端装置1200包括处理模块1210和收发模块1220。示例性地,第三终端装置1200可以是终端设备,也可以是应用于终端设备中的芯片或者其他具有上述终端设备功能的组合器件、部件等。当第三终端装置1200是终端设备时,收发模块1220可以是收发器,收发器可以包括天线和射频电路等,处理模块1210可以是处理器,例如基带处理器,基带处理器中可以包括一个或多个CPU。当第三终端装置1200是具有上述终端设备功能的部件时,收发模块1220可以是射频单元,处理模块1210可以是处理器,例如基带处理器。当第三终端装置1200是芯片系统时,收发模块1220可以是芯片(例如基带芯片)的输入输出接口、处理模块1210可以是芯片系统的处理器,可以包括一个或多个中央处理单元。应理解,本申请实施例中的处理模块1210可以由处理器或处理器相关电路组件实现,收发模块1220可以由收发器或收发器相关电路组件实现。
例如,处理模块1210可以用于执行图6所示的实施例中由第三终端装置所执行的除了收发操作之外的全部操作,例如S63,和/或用于支持本文所描述的技术的其它过程。收发模块1220可以用于执行图6所示的实施例中由第三终端装置所执行的全部收发操作,例如S62、S64和S66,和/或用于支持本文所描述的技术的其它过程。
另外,收发模块1220可以是一个功能模块,该功能模块既能完成发送操作也能完成接收操作,例如收发模块1220可以用于执行图6所示的实施例中由第三终端装置所执行的全部发送操作和接收操作,例如,在执行发送操作时,可以认为收发模块1220是发送模块,而在执行接收操作时,可以认为收发模块1220是接收模块;或者,收发模块1220也可以是两个功能模块,收发模块1220可以视为这两个功能模块的统称,这两个功能模块分别为发送模块和接收模块,发送模块用于完成发送操作,例如发送模块可以用于执行图6所示的实施例的任一个实施例中由第三终端装置所执行的全部发送操作,接收模块用于完成接收操作,例如接收模块可以用于执行图6所示的实施例由第三终端装置所执行的全部接收操作。
其中,收发模块1220,用于接收来自第一终端装置的第一信息,所述第一信息用于触发确定第二信息;
处理模块1210,用于检测来自至少一个第四终端装置的侧行控制信息,以确定第二时频资源,所述至少一个第四终端装置包括所述第一终端装置,所述第二时频资源用于确定所述第一终端装置发送数据的时频资源;
收发模块1220,还用于向所述第一终端装置发送所述第二信息,所述第二信息用于指示所述第二时频资源;
收发模块1220,还用于接收来自所述第一终端装置的第一数据。
作为一种可选的实施方式,收发模块1220用于通过如下方式接收来自第一终端装置的第一信息:
接收来自所述第一终端装置的第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
作为一种可选的实施方式,所述第一信息还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
作为一种可选的实施方式,处理模块1210还用于:
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源未被排除使用,确定通过所述第四时频资源发送所述第二信息;或,
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于优先级门限时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;或,
根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于所述第一数据的优先级时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;
其中,所述第二数据为预约所述第四时频资源的第四终端装置待通过所述第四时频资源发送的数据。
作为一种可选的实施方式,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
作为一种可选的实施方式,处理模块1210,还用于确定通过所述第五时频资源发送所述第二信息。
作为一种可选的实施方式,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
作为一种可选的实施方式,收发模块1220,还用于在第六时频资源接收来自所述第一终端装置的重传的所述第一信息,所述第六时频资源由所述第一SCI指示。
作为一种可选的实施方式,收发模块1220用于通过如下方式向所述第一终端装置发送所述第二信息:
向所述第一终端装置发送第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
作为一种可选的实施方式,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
作为一种可选的实施方式,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,处理模块1210用于通过如下方式检测来自至少一个第一终端装置的侧行控制信息,以确定第二时频资源:
根据检测结果以及所述第一数据的数据包大小确定所述第二时频资源。
作为一种可选的实施方式,
所述第二时频资源包括可用于向第三终端装置1200发送数据的时频资源;或,
所述第二时频资源包括不可用于向第三终端装置1200发送数据的时频资源。
作为一种可选的实施方式,收发模块1220用于通过如下方式接收来自所述第一终端 装置的第一数据:
通过第三时频资源接收来自所述第一终端装置的第一数据,其中,所述第三时频资源根据第一时频资源和所述第二时频资源确定的,所述第一时频资源是所述第一终端装置检测来自至少一个第二终端装置的侧行控制信息而确定的。
关于第三终端装置1200所能实现的其他功能,可参考图6所示的实施例的相关介绍,不多赘述。
本申请实施例还提供一种通信装置,该通信装置可以是终端设备也可以是电路。该通信装置可以用于执行上述方法实施例中由第一终端装置所执行的动作。
当该通信装置为终端设备时,图13示出了一种简化的终端设备的结构示意图。便于理解和图示方便,图13中,终端设备以手机作为例子。如图13所示,终端设备包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理,以及对终端设备进行控制,执行软件程序,处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置,例如触摸屏、显示屏,键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是,有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时,处理器对待发送的数据进行基带处理后,输出基带信号至射频电路,射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时,射频电路通过天线接收到射频信号,将射频信号转换为基带信号,并将基带信号输出至处理器,处理器将基带信号转换为数据并对该数据进行处理。为便于说明,图13中仅示出了一个存储器和处理器。在实际的终端设备产品中,可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置,也可以是与处理器集成在一起,本申请实施例对此不做限制。
在本申请实施例中,可以将具有收发功能的天线和射频电路视为终端设备的收发单元(收发单元可以是一个功能单元,该功能单元能够实现发送功能和接收功能;或者,收发单元也可以包括两个功能单元,分别为能够实现接收功能的接收单元和能够实现发送功能的发送单元),将具有处理功能的处理器视为终端设备的处理单元。如图13所示,终端设备包括收发单元1310和处理单元1320。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器,处理单板,处理模块、处理装置等。可选的,可以将收发单元1310中用于实现接收功能的器件视为接收单元,将收发单元1310中用于实现发送功能的器件视为发送单元,即收发单元1310包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解,收发单元1310用于执行上述方法实施例中终端设备侧的发送操作和接收操作,处理单元1320用于执行上述方法实施例中终端设备上除了收发操作之外的其他操作。
例如,在一种实现方式中,处理单元1320可以用于执行图6所示的实施例中由第一终端装置所执行的除了收发操作之外的全部操作,例如S61和S65,和/或用于支持本文所描述的技术的其它过程。收发单元1310可以用于执行图6所示的实施例中由第一终端装置所执行的全部收发操作,例如S62、S64和S66,和/或用于支持本文所描述的技术的其 它过程。
又例如,在一种实现方式中,处理单元1320可以用于执行图6所示的实施例中由第三终端装置所执行的除了收发操作之外的全部操作,例如S63,和/或用于支持本文所描述的技术的其它过程。收发单元1310可以用于执行图6所示的实施例中由第三终端装置所执行的全部收发操作,例如S62、S64和S66,和/或用于支持本文所描述的技术的其它过程。
当该通信装置为芯片类的装置或者电路时,该装置可以包括收发单元和处理单元。其中,所述收发单元可以是输入输出电路和/或通信接口;处理单元为集成的处理器或者微处理器或者集成电路。
本实施例中的通信装置为终端设备时,可以参照图14所示的设备。作为一个例子,该设备可以完成类似于图11中处理模块1110的功能。作为又一个例子,该设备可以完成类似于图12中处理模块1210的功能。在图14中,该设备包括处理器1410,发送数据处理器1420,接收数据处理器1430。上述实施例中的处理模块1110可以是图14中的该处理器1410,并完成相应的功能;上述实施例中的收发模块1120可以是图14中的发送数据处理器1420,和/或接收数据处理器1430,并完成相应的功能。或者,上述实施例中的处理模块1210可以是图14中的该处理器1410,并完成相应的功能;上述实施例中的收发模块1220可以是图14中的发送数据处理器1420,和/或接收数据处理器1430,并完成相应的功能。虽然图14中示出了信道编码器、信道解码器,但是可以理解这些模块并不对本实施例构成限制性说明,仅是示意性的。
图15示出本实施例的另一种形式。处理装置1500中包括调制子系统、中央处理子系统、周边子系统等模块。本实施例中的通信装置可以作为其中的调制子系统。具体的,该调制子系统可以包括处理器1503,接口1504。其中,处理器1503完成上述处理模块1110的功能,接口1504完成上述收发模块1120的功能。或者,处理器1503完成上述处理模块1210的功能,接口1504完成上述收发模块1220的功能。作为另一种变形,该调制子系统包括存储器1506、处理器1503及存储在存储器1506上并可在处理器上运行的程序,该处理器1503执行该程序时实现上述方法实施例中终端设备侧的方法。需要注意的是,所述存储器1506可以是非易失性的,也可以是易失性的,其位置可以位于调制子系统内部,也可以位于处理装置1500中,只要该存储器1506可以连接到所述处理器1503即可。
本申请实施例提供一种通信系统。该通信系统可以包括上述的图6所示的实施例所涉及的第一终端装置,以及包括上述的图6所示的实施例所涉及的第三终端装置。第一终端装置例如为图11中的第一终端装置1100。第三终端装置例如为图12中的第三终端装置1200。
本申请实施例还提供一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,该计算机程序被计算机执行时,所述计算机可以实现上述方法实施例提供的图6所示的实施例中与第一终端装置相关的流程。
本申请实施例还提供一种计算机可读存储介质,所述计算机可读存储介质用于存储计算机程序,该计算机程序被计算机执行时,所述计算机可以实现上述方法实施例提供的图6所示的实施例中与第三终端装置相关的流程。
本申请实施例还提供一种计算机程序产品,所述计算机程序产品用于存储计算机程序,该计算机程序被计算机执行时,所述计算机可以实现上述方法实施例提供的图6所示的实 施例中与第一终端装置相关的流程。
本申请实施例还提供一种计算机程序产品,所述计算机程序产品用于存储计算机程序,该计算机程序被计算机执行时,所述计算机可以实现上述方法实施例提供的图6所示的实施例中与第三终端装置相关的流程。
应理解,本申请实施例中提及的处理器可以是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或非易失性存储器,或可包括易失性和非易失性存储器两者。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),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如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)集成在处理器中。
应注意,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。
应理解,在本申请的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、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。另一点,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。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的 部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的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。以此为例但不限于:计算机可读介质可以包括随机存取存储器(random access memory,RAM)、只读存储器(read-only memory,ROM)、电可擦可编程只读存储器(electrically erasable programmable read only memory,EEPROM)、紧凑型光盘只读存储器(compact disc read-only memory,CD-ROM)、通用串行总线闪存盘(universal serial bus flash disk)、移动硬盘、或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
以上所述,仅为本申请的具体实施方式,但本申请实施例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实施例揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请实施例的保护范围之内。因此,本申请实施例的保护范围应所述以权利要求的保护范围为准。

Claims (54)

  1. 一种通信方法,其特征在于,包括:
    检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,所述至少一个第二终端装置包括第三终端装置,所述第一时频资源包括不可用于向所述第三终端装置发送数据的时频资源;
    向所述第三终端装置发送第一信息,所述第一信息用于触发确定第二信息;
    接收来自所述第三终端装置的所述第二信息,所述第二信息用于指示第二时频资源,所述第二时频资源用于确定向第三终端装置发送数据的时频资源;
    根据所述第一时频资源和所述第二时频资源确定第三时频资源;
    通过所述第三时频资源向所述第三终端装置发送第一数据。
  2. 根据权利要求1所述的方法,其特征在于,向所述第三终端装置发送第一信息,包括:
    向所述第三终端装置发送第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
  3. 根据权利要求2所述的方法,其特征在于,所述第一信息还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
  4. 根据权利要求2所述的方法,其特征在于,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
  5. 根据权利要求2~4任一项所述的方法,其特征在于,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
  6. 根据权利要求2~5任一项所述的方法,其特征在于,所述方法还包括:
    在第六时频资源向所述第三终端装置重传所述第一信息,所述第六时频资源由所述第一SCI指示。
  7. 根据权利要求1~6任一项所述的方法,其特征在于,接收来自所述第三终端装置的所述第二信息,包括:
    接收来自所述第三终端装置的第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
  8. 根据权利要求7所述的方法,其特征在于,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
  9. 根据权利要求1~8任一项所述的方法,其特征在于,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,所述第一数据的数据包大小用于确定所述第二时频资源。
  10. 根据权利要求1~9任一项所述的方法,其特征在于,所述第三时频资源为所述第二时频资源,通过所述第三时频资源向所述第三终端装置发送第一数据,包括:
    通过所述第二时频资源向所述第三终端装置发送所述第一数据。
  11. 根据权利要求1~10任一项所述的方法,其特征在于,
    检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,还包括:
    检测来自所述至少一个第二终端装置的侧行控制信息,以确定第七时频资源,所述第 七时频资源是根据所述检测的侧行控制信息确定的可用的时频资源中在时域上最早的时频资源;
    向所述第三终端装置发送第一信息,包括:
    通过所述第七时频资源向所述第三终端装置发送所述第一信息。
  12. 根据权利要求1~11任一项所述的方法,其特征在于,
    所述第二时频资源包括可用于向所述第三终端装置发送数据的时频资源;或,
    所述第二时频资源包括不可用于向所述第三终端装置发送数据的时频资源。
  13. 一种通信方法,其特征在于,包括:
    接收来自第一终端装置的第一信息,所述第一信息用于触发确定第二信息;
    检测来自至少一个第四终端装置的侧行控制信息,以确定第二时频资源,所述至少一个第四终端装置包括所述第一终端装置,所述第二时频资源用于确定所述第一终端装置发送数据的时频资源;
    向所述第一终端装置发送所述第二信息,所述第二信息用于指示所述第二时频资源;
    接收来自所述第一终端装置的第一数据。
  14. 根据权利要求13所述的方法,其特征在于,接收来自第一终端装置的第一信息,包括:
    接收来自所述第一终端装置的第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
  15. 根据权利要求14所述的方法,其特征在于,所述第一信息还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
  16. 根据权利要求15所述的方法,其特征在于,所述方法还包括:
    根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源未被排除使用,确定通过所述第四时频资源发送所述第二信息;或,
    根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于优先级门限时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;或,
    根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于所述第一数据的优先级时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;
    其中,所述第二数据为预约所述第四时频资源的第四终端装置待通过所述第四时频资源发送的数据。
  17. 根据权利要求14所述的方法,其特征在于,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
  18. 根据权利要求17所述的方法,其特征在于,所述方法还包括:
    确定通过所述第五时频资源发送所述第二信息。
  19. 根据权利要求14~18任一项所述的方法,其特征在于,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
  20. 根据权利要求14~19任一项所述的方法,其特征在于,所述方法还包括:
    在第六时频资源接收来自所述第一终端装置的重传的所述第一信息,所述第六时频资源由所述第一SCI指示。
  21. 根据权利要求13~20任一项所述的方法,其特征在于,向所述第一终端装置发送所述第二信息,包括:
    向所述第一终端装置发送第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
  22. 根据权利要求21所述的方法,其特征在于,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
  23. 根据权利要求13~22任一项所述的方法,其特征在于,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,检测来自至少一个第一终端装置的侧行控制信息,以确定第二时频资源,包括:
    根据检测结果以及所述第一数据的数据包大小确定所述第二时频资源。
  24. 根据权利要求13~23任一项所述的方法,其特征在于,
    所述第二时频资源包括可用于向所述第三终端装置发送数据的时频资源;或,
    所述第二时频资源包括不可用于向所述第三终端装置发送数据的时频资源。
  25. 根据权利要求13~24任一项所述的方法,其特征在于,接收来自所述第一终端装置的第一数据,包括:
    通过第三时频资源接收来自所述第一终端装置的第一数据,其中,所述第三时频资源根据第一时频资源和所述第二时频资源确定的,所述第一时频资源是所述第一终端装置检测来自至少一个第二终端装置的侧行控制信息而确定的。
  26. 一种终端装置,其特征在于,包括:
    处理模块,用于检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,所述至少一个第二终端装置包括第三终端装置,所述第一时频资源包括不可用于向所述第三终端装置发送数据的时频资源;
    收发模块,用于向所述第三终端装置发送第一信息,所述第一信息用于触发确定第二信息;
    所述收发模块,还用于接收来自所述第三终端装置的所述第二信息,所述第二信息用于指示第二时频资源,所述第二时频资源用于确定向第三终端装置发送数据的时频资源;
    所述处理模块,还用于根据所述第一时频资源和所述第二时频资源确定第三时频资源;
    所述收发模块,还用于通过所述第三时频资源向所述第三终端装置发送第一数据。
  27. 根据权利要求26所述的终端装置,其特征在于,所述收发模块用于通过如下方式向所述第三终端装置发送第一信息:
    向所述第三终端装置发送第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
  28. 根据权利要求27所述的终端装置,其特征在于,所述第二SCI还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
  29. 根据权利要求27所述的终端装置,其特征在于,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
  30. 根据权利要求27~29任一项所述的终端装置,其特征在于,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
  31. 根据权利要求27~30任一项所述的终端装置,其特征在于,所述收发模块,还用于在第六时频资源向所述第三终端装置重传所述第一信息,所述第六时频资源由所述第一SCI指示。
  32. 根据权利要求26~31任一项所述的终端装置,其特征在于,所述收发模块,用于通过如下方式接收来自所述第三终端装置的所述第二信息:
    接收来自所述第三终端装置的第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
  33. 根据权利要求32所述的终端装置,其特征在于,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
  34. 根据权利要求26~33任一项所述的终端装置,其特征在于,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,所述第一数据的数据包大小用于确定所述第二时频资源。
  35. 根据权利要求26~34任一项所述的终端装置,其特征在于,所述第三时频资源为所述第二时频资源,所述收发模块用于通过如下方式通过所述第三时频资源向所述第三终端装置发送第一数据:
    通过所述第二时频资源向所述第三终端装置发送所述第一数据。
  36. 根据权利要求26~35任一项所述的终端装置,其特征在于,
    所述处理模块用于检测来自至少一个第二终端装置的侧行控制信息,以确定第一时频资源,还用于检测来自所述至少一个第二终端装置的侧行控制信息,以确定第七时频资源,所述第七时频资源是根据所述检测的侧行控制信息确定的可用的时频资源中在时域上最早的时频资源;
    所述收发模块用于通过如下方式向所述第三终端装置发送第一信息:通过所述第七时频资源向所述第三终端装置发送所述第一信息。
  37. 根据权利要求26~36任一项所述的终端装置,其特征在于,
    所述第二时频资源包括可用于向所述第三终端装置发送数据的时频资源;或,
    所述第二时频资源包括不可用于向所述第三终端装置发送数据的时频资源。
  38. 一种终端装置,其特征在于,包括:
    收发模块,用于接收来自第一终端装置的第一信息,所述第一信息用于触发确定第二信息;
    处理模块,用于检测来自至少一个第四终端装置的侧行控制信息,以确定第二时频资源,所述至少一个第四终端装置包括所述第一终端装置,所述第二时频资源用于确定向所述终端装置发送数据的时频资源;
    所述收发模块,还用于向所述第一终端装置发送所述第二信息,所述第二信息用于指示所述第二时频资源;
    所述收发模块,还用于接收来自所述第一终端装置的第一数据。
  39. 根据权利要求38所述的终端装置,其特征在于,所述收发模块用于通过如下方式接收来自第一终端装置的第一信息:
    接收来自所述第一终端装置的第一控制信息,所述第一控制信息包括第一SCI和第二SCI,所述第一SCI为第一级SCI,所述第二SCI为第二级SCI,所述第二SCI包括所述第一信息。
  40. 根据权利要求39所述的终端装置,其特征在于,所述第二SCI还用于指示第四时频资源,所述第四时频资源用于确定发送所述第二信息的时频资源。
  41. 根据权利要求40所述的终端装置,其特征在于,所述处理模块还用于:
    根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源未被排除使用,确定通过所述第四时频资源发送所述第二信息;或,
    根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于优先级门限时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;或,
    根据对来自所述至少一个第四终端装置的侧行控制信息的检测,确定所述第四时频资源被排除使用,则,当第二数据的优先级高于所述第一数据的优先级时,确定通过未被排除使用的时频资源发送所述第二信息,否则,确定通过所述第四时频资源发送所述第二信息;
    其中,所述第二数据为预约所述第四时频资源的第四终端装置待通过所述第四时频资源发送的数据。
  42. 根据权利要求39所述的终端装置,其特征在于,所述第一SCI用于指示第五时频资源,所述第五时频资源用于发送所述第二信息。
  43. 根据权利要求42所述的终端装置,其特征在于,所述处理模块,还用于确定通过所述第五时频资源发送所述第二信息。
  44. 根据权利要求39~43任一项所述的终端装置,其特征在于,所述第一SCI还包括第一字段,所述第一字段用于指示所述第二SCI包括所述第一信息。
  45. 根据权利要求39~44任一项所述的终端装置,其特征在于,所述收发模块,还用于在第六时频资源接收来自所述第一终端装置的重传的所述第一信息,所述第六时频资源由所述第一SCI指示。
  46. 根据权利要求38~45任一项所述的终端装置,其特征在于,所述收发模块用于通过如下方式向所述第一终端装置发送所述第二信息:
    向所述第一终端装置发送第二控制信息,所述第二控制信息包括第三SCI和第四SCI,所述第三SCI为第一级SCI,所述第四SCI为第二级SCI,所述第四SCI包括所述第二信息。
  47. 根据权利要求46所述的终端装置,其特征在于,所述第三SCI还包括第二字段,所述第二字段用于指示所述第四SCI包括所述第二信息。
  48. 根据权利要求38~47任一项所述的终端装置,其特征在于,所述第一信息还包括用于指示所述第一数据的数据包大小的信息,所述处理模块用于通过如下方式检测来自至少一个第一终端装置的侧行控制信息,以确定第二时频资源:
    根据检测结果以及所述第一数据的数据包大小确定所述第二时频资源。
  49. 根据权利要求38~48任一项所述的终端装置,其特征在于,
    所述第二时频资源包括可用于向所述终端装置发送数据的时频资源;或,
    所述第二时频资源包括不可用于向所述终端装置发送数据的时频资源。
  50. 根据权利要求38~49任一项所述的终端装置,其特征在于,所述收发模块用于通过如下方式接收来自所述第一终端装置的第一数据:
    通过第三时频资源接收来自所述第一终端装置的第一数据,其中,所述第三时频资源根据第一时频资源和所述第二时频资源确定的,所述第一时频资源是所述第一终端装置检测来自至少一个第二终端装置的侧行控制信息而确定的。
  51. 一种终端装置,其特征在于,包括处理器,所述处理器与至少一个存储器耦合,所述处理器用于读取所述至少一个存储器所存储的计算机程序,以执行如权利要求1~12中任意一项所述的方法,或执行如权利要求13~25中任意一项所述的方法。
  52. 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用于存储计算机程序,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1~12中任意一项所述的方法,或者使得所述计算机执行如权利要求13~25中任意一项所述的方法。
  53. 一种芯片,其特征在于,包括处理器和通信接口,所述处理器用于读取指令以执行权利要求1~12中任意一项所述的方法,或者执行权利要求13~25中任意一项所述的方法。
  54. 一种通信系统,其特征在于,包括如权利要求26~37中任意一项所述的终端装置,以及包括如权利要求38~50中任意一项所述的终端装置。
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