WO2021148042A1 - 辅链路通信方法、设备和存储介质 - Google Patents

辅链路通信方法、设备和存储介质 Download PDF

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Publication number
WO2021148042A1
WO2021148042A1 PCT/CN2021/074493 CN2021074493W WO2021148042A1 WO 2021148042 A1 WO2021148042 A1 WO 2021148042A1 CN 2021074493 W CN2021074493 W CN 2021074493W WO 2021148042 A1 WO2021148042 A1 WO 2021148042A1
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Prior art keywords
terminal device
link resource
information
auxiliary link
resource
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PCT/CN2021/074493
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English (en)
French (fr)
Inventor
曲鑫
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北京紫光展锐通信技术有限公司
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Priority to US17/759,189 priority Critical patent/US20230040934A1/en
Publication of WO2021148042A1 publication Critical patent/WO2021148042A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • This application relates to the field of communication technology, and in particular to a method, device and storage medium for auxiliary link communication.
  • NR V2X Vehicle to Everything
  • LTE Long Term Evolution
  • the auxiliary link terminal can adopt a random resource selection method.
  • the secondary link terminal When the secondary link terminal has data to send, it directly selects a resource of an appropriate size in a network configuration or a pre-configured resource pool to send it randomly. This method causes resource collisions between auxiliary link terminals, and the reliability is low.
  • This application provides an auxiliary link communication method, device, and storage medium to improve communication reliability and resource utilization.
  • this application provides an auxiliary link communication method, including:
  • the first terminal device obtains the first auxiliary link resource reserved for the second terminal device
  • the first terminal device sends the information of the first auxiliary link resource to the second terminal device, so that the second terminal device obtains the first auxiliary link resource information according to the information of the first auxiliary link resource.
  • Link resources
  • this application provides a method for auxiliary link communication, including:
  • the second terminal device receives the information of the first secondary link resource sent by the first terminal device;
  • the first secondary link resource is the secondary link resource reserved for use by the second terminal device;
  • the second terminal device obtains the first secondary link resource according to the information of the first secondary link resource.
  • an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the method according to any one of the first aspects is implemented.
  • an embodiment of the present application provides a first terminal device, including:
  • a memory for storing executable instructions of the processor
  • the processor is configured to execute the method according to any one of the first aspects by executing the executable instruction.
  • an embodiment of the present application provides a second terminal device, including:
  • a memory for storing executable instructions of the processor
  • the processor is configured to execute the method according to any one of the second aspects by executing the executable instruction.
  • the first terminal device obtains the first auxiliary link resource reserved for the second terminal device; the first terminal device sends the information to the second terminal device Sending the information of the first auxiliary link resource so that the second terminal device obtains the first auxiliary link resource according to the information of the first auxiliary link resource, and the first terminal device obtains it as the second terminal
  • the first auxiliary link resource reserved by the device, the first auxiliary link resource is allocated according to the resource occupancy of the area, and the information of the first auxiliary link resource is sent to the second terminal device, the second terminal device
  • the first auxiliary link resource is acquired according to the information of the first auxiliary link resource, and data is sent according to the first auxiliary link resource reserved for it, which improves the reliability of communication and the resource utilization rate.
  • Figure 1 is an application scenario diagram provided by an embodiment of the application
  • Figure 2 is a schematic diagram of a resource pool provided by an embodiment of the application.
  • FIG. 3 is a schematic flowchart of an embodiment of a secondary link communication method provided by the present application.
  • FIG. 4 is a schematic diagram of the principle of an embodiment of the auxiliary link communication method provided by the present application.
  • FIG. 5 is a schematic diagram of a scenario of an embodiment of the method provided by the present application.
  • FIG. 6 is a schematic flowchart of another embodiment of the auxiliary link communication method provided by the present application.
  • FIG. 7 is a schematic diagram of the interaction flow of an embodiment of the auxiliary link communication method provided by the present application.
  • FIG. 8 is a schematic structural diagram of an embodiment of the first terminal device provided by the present application.
  • FIG. 9 is a schematic structural diagram of an embodiment of a second terminal device provided by the present application.
  • FIG. 10 is a schematic structural diagram of another embodiment of the first terminal device provided by the present application.
  • FIG. 11 is a schematic structural diagram of another embodiment of a second terminal device provided by the present application.
  • V2X Vehicle-to-pedestrian V2P
  • V2P is a type of V2X technology. Through information exchange between pedestrian terminal equipment and vehicle-mounted equipment, it prevents the vehicle and pedestrian from being exchanged. Collision.
  • V2P can detect the position, direction and speed of pedestrians with the help of terminal devices such as smart phones or smart wearable devices, and obtain the position, direction and speed of surrounding vehicles through shortwave communication technology. If two or more of them are considered to remain in the original state after calculation If you continue to exercise, a collision will occur, and a warning message will be issued on the user's terminal device.
  • the intelligent driving assistance system will also prompt the driver of the danger ahead through sounds, images, etc.
  • data can be sent directly between two terminal devices without first sending the data to the network device, and then forwarding it through the network device, and then sending it to the terminal device at the receiving end.
  • Figure 1 is a schematic diagram of a network architecture provided by an embodiment of this application.
  • the technical solution provided by this application is based on the network architecture shown in Figure 1.
  • the network architecture includes a first terminal device and at least one second terminal device.
  • Figure 1 shows a first terminal device and two second terminal devices.
  • the first terminal device may be a Road Side Unit (RSU) in a secondary link terminal, for example, a road side unit arranged at an intersection, or a secondary link terminal that is not sensitive to power consumption.
  • RSU Road Side Unit
  • the terminal device may be an auxiliary link terminal that is sensitive or insensitive to power consumption, such as a pedestrian's cell phone, smart wearable device, etc., or a vehicle-mounted device.
  • V2X technology includes two resource acquisition methods.
  • One method is a resource allocation method that requires network equipment (such as base stations) to perform resource scheduling. It corresponds to Mode 3 in LTE V2X and Mode 1 in NR V2X.
  • the other method is based on Perceived resource selection is a resource allocation method that does not require network equipment to perform resource scheduling. It includes mode 4 in LTE V2X and mode 2 in NR V2X, as well as partially-aware resource selection methods.
  • the auxiliary link terminal can adopt a random resource selection method.
  • the secondary link terminal When the secondary link terminal has data to send, it directly selects a resource of an appropriate size in the network configuration or pre-configured resource pool to send it (there is no need to perform resource selection through perception). This method causes resource collisions between auxiliary link terminals, and the reliability is low.
  • the granularity of the time domain is a set of slots
  • the granularity of the frequency domain is a set of subchannels.
  • a set of subchannels contains M resource blocks RB, where M is High-level configuration.
  • the terminal device determines that L subchannels are required for transmission according to the size of the data packet.
  • the selected transmission resource is L continuous subchannels in a certain subframe subframe in the resource pool.
  • the method of the embodiment of the present application makes flexible adjustments according to the resource occupancy of the area where the second terminal device is located, and obtains secondary link resources reserved for the second terminal device, where the secondary link resources are resources that are not occupied by other terminal devices. Or, there are no resources allocated to other terminal devices, which improves communication reliability and resource utilization.
  • FIG. 3 is a schematic flowchart of an embodiment of a secondary link communication method provided by the present application. As shown in Figure 3, the method provided in this embodiment includes:
  • Step 101 The first terminal device obtains the first secondary link resource reserved for the second terminal device.
  • the first terminal device obtains the first auxiliary link resource reserved for the second terminal device, which may be obtained from the second auxiliary link resource scheduled and allocated by the network device, or from the resource configured or pre-configured by the network device
  • the pool is acquired through autonomous perception.
  • the first terminal device before acquiring the first auxiliary link resource from the second auxiliary link resource allocated by the network device scheduling, the first terminal device receives the information of the second auxiliary link resource sent by the network device.
  • the second secondary link resource is, for example, a resource reserved for at least one second terminal device scheduled and allocated by the first terminal device, and the first terminal device selects some resources from the second secondary link resources to the current second terminal
  • the device, or, the second auxiliary link resource is the resource allocated by the network device to the current second terminal device.
  • the resource pool may be a resource pool as shown in FIG. 2.
  • the first terminal device obtains the resource reserved for the second terminal device from the resource pool through autonomous sensing, and the resource may not be used by other terminal devices, and/ Or, there are no resources reserved for other terminal devices. Further, the resource may also be a resource with less interference.
  • the first secondary link resource includes frequency domain resources and time domain resources; the frequency domain resources include at least one subchannel, and the time domain resources include at least one time slot.
  • it includes at least two sub-channels that are continuous or discontinuous in the frequency domain, and at least two time slots that are continuous or discontinuous in the time domain.
  • the first terminal device may actively obtain and reserve the first auxiliary link resource for the second terminal device and send the information of the first auxiliary link resource to the second terminal device, or after receiving the resource request sent by the second terminal device Acquire the first auxiliary link resource and send the information of the first auxiliary link resource to the second terminal device.
  • the method before step 101, the method further includes:
  • the first terminal device receives a resource request from the second terminal device; the resource request is used to request the first terminal device to send the first secondary link resource reserved for the second terminal device Information.
  • Step 102 The first terminal device sends the information of the first auxiliary link resource to the second terminal device, so that the second terminal device obtains the first auxiliary link resource according to the information of the first auxiliary link resource.
  • the first terminal device after acquiring the first secondary link resource reserved for the second terminal device, the first terminal device sends the information of the first secondary link resource to the second terminal device, and the second terminal device receives the first secondary link resource.
  • the terminal device sends the information of the first auxiliary link resource, acquires the first auxiliary link resource according to the information of the first auxiliary link resource, sends data according to the first auxiliary link resource, and communicates with other terminal devices.
  • the second terminal device selects all or part of the first auxiliary link resources to send data.
  • the first terminal device sends the information of the first secondary link resource to the second terminal device through a secondary link physical layer control channel (PSCCH).
  • PSCCH secondary link physical layer control channel
  • the first terminal device can obtain the first auxiliary link resource reserved for the second terminal device according to the resource occupation of the area, and send the information of the first auxiliary link resource to the second terminal device.
  • the terminal device, the second terminal device obtains the first auxiliary link resource according to the information of the first auxiliary link resource, and sends data according to the first auxiliary link resource reserved for it, which improves the reliability and resources of communication Utilization rate.
  • step 102 can be implemented in the following ways:
  • the first terminal device uses the broadcast service identifier to send the information of the first auxiliary link resource to the second terminal device by broadcasting.
  • the broadcast service identifier is used to indicate that the second terminal device receives the first terminal device broadcasting the first auxiliary link resource.
  • the ID corresponding to the information.
  • the first terminal device sends the information of the first auxiliary link resource to the second terminal device by broadcasting, and the second terminal device uses the corresponding broadcast service identifier to receive the information of the first auxiliary link resource, and the broadcast service identifier It can be recorded as destination ID.
  • the first terminal device may actively obtain the reserved first secondary link resource for the second terminal device and send the information of the first secondary link resource to the second terminal device.
  • the first terminal device uses the multicast user service identifier corresponding to the second terminal device to send information about the first auxiliary link resource to the second terminal device in a multicast manner.
  • the multicast user service identifier is used to indicate a group of second terminals
  • the device receives the identifier corresponding to the information of the first auxiliary link resource multicast by the first terminal device.
  • the first terminal device sends the information of the first auxiliary link resource to the second terminal device in a multicast manner, and the second terminal device uses the corresponding multicast user service identifier to receive the information of the first auxiliary link resource,
  • the service identifier of a multicast user can be recorded as a group ID.
  • the first terminal device may actively obtain the reserved first auxiliary link resource for the second terminal device and send the information of the first auxiliary link resource to the second terminal device, or when receiving the second terminal device After sending the resource request, the device obtains the first auxiliary link resource and sends the information of the first auxiliary link resource to the second terminal device.
  • the first terminal device uses the user service identifier of the second terminal device to send the information of the first auxiliary link resource to the second terminal device through unicast, and the user service identifier of the second terminal device is used to indicate that the second terminal device receives The identifier corresponding to the information of the first secondary link resource unicast sent by the first terminal device.
  • the first terminal device sends the information of the first auxiliary link resource to the second terminal device in a unicast manner
  • the second terminal device uses the user service identifier of the second terminal device to receive the order from the first terminal device to the second terminal device.
  • the user service identifier of the second terminal device can be recorded as the destination ID.
  • the first terminal device may actively obtain the reserved first auxiliary link resource for the second terminal device and send the information of the first auxiliary link resource to the second terminal device, or when receiving the second terminal device After sending the resource request, the device obtains the first auxiliary link resource and sends the information of the first auxiliary link resource to the second terminal device.
  • the foregoing service may refer to a service in which the first terminal device sends information about the auxiliary link resource to at least one second terminal device.
  • the information of the first secondary link resource is carried in secondary link control information (sidelink control information, SCI for short).
  • SCI sidelink control information
  • the SCI is carried by the PSCCH, and the SCI may also contain any of the above-mentioned service identifiers.
  • the SCI includes a first SCI field and a second SCI field
  • the first SCI field carries information about the first auxiliary link resource
  • the second SCI field carries at least one of the following identifiers: broadcast service identifier , The corresponding multicast user service identifier of the second terminal device or the user service identifier of the second terminal device.
  • the first terminal device includes the information of the first secondary link resource in the secondary link control information SCI.
  • it can use the format of the SCI in NR V2X to indicate its associated data channel occupation resource information.
  • the first terminal device uses SCI to indicate a group of auxiliary link resources to be reserved and sent to the second terminal device for use.
  • the first terminal device uses one sub-channel to transmit the SCI. That is, a subchannel in the frequency domain is used to send SCI, including the first SCI field (or called the 1st stage SCI) and the second SCI field (or 2nd stage SCI), and the first SCI field carries the first auxiliary link. Resource information, the second SCI field contains the corresponding service identifier.
  • the first terminal device sends the SCI on a single sub-channel (occupies the dark gray resource block in Figure 4), the period is P, and the SCI carries the first auxiliary link resource reserved for the second terminal device
  • the information indicated in the SCI is the information of the first auxiliary link resource
  • the second terminal device monitors the SCI sent by the first terminal to obtain the information of the first auxiliary link resource, and obtain the first auxiliary link resource ( The light gray resource block in Fig. 4), and select all or part of the first auxiliary link resource to send the auxiliary link data.
  • the period P can also be indicated in the SCI.
  • the second terminal device determines the value of the corresponding field in the SCI to be sent according to the time-frequency domain information of the selected resource, and the second terminal device sends the SCI and data on the selected resource.
  • the first terminal device can obtain the first auxiliary link resource reserved for the second terminal device according to the resource occupancy of the area, and broadcast, multicast or unicast the first auxiliary link resource.
  • the information of the secondary link resource is sent to the second terminal device, and the second terminal device obtains the first secondary link resource according to the information of the first secondary link resource, and sends it according to the first secondary link resource reserved for it Data improves the reliability of communication and resource utilization.
  • the first terminal device sending the information of the first secondary link resource can be implemented in the following manner:
  • the first terminal device sends time slot offset information to the second terminal device, where the time slot offset information is used to indicate the time slot of the SCI carrying the information of the first auxiliary link resource and the first auxiliary link resource information.
  • the offset between the first time slot in the link resource is used to indicate the time slot of the SCI carrying the information of the first auxiliary link resource and the first auxiliary link resource information.
  • the information of the first secondary link resource may be indicated by the time slot offset, and the time slot offset information may be used to indicate the time slot and the first time slot of the indication information carrying the information of the first secondary link resource.
  • the slot offset of the first slot in the secondary link resource is SCI
  • the time slot offset may be the time slot offset of the time slot where the SCI is located and the first time slot in the first auxiliary link resource.
  • the method for indicating time domain resources of other time slots in the first secondary link resource may adopt the existing R16 V2X solution.
  • the method for indicating the frequency domain resources included in the first auxiliary link resource may adopt the existing scheme of the existing R16V2X.
  • the first terminal device 1 may be a roadside unit in this embodiment, and may transmit the reserved first auxiliary link to the P user (the second terminal device) through the PC5 port Resource information.
  • the first terminal device is set at a certain intersection.
  • the second terminal device 2-5 is a P user, and when it has the PC5 port receiving capability, it can receive the first auxiliary link resource information sent by the first terminal device 1.
  • the second terminal device 2-5 can send at least one item of information such as its own location information, speed information, or travel direction to other vehicles, and send the above information to other vehicles.
  • the resource can be selected according to the information of the first secondary link resource sent by the roadside device.
  • the first terminal device may send the information of the first auxiliary link resource reserved for the second terminal device 2-5 to at least one of the second terminal devices 2-5 through broadcast, unicast, or multicast.
  • the link resource may be selected by the first terminal device from a configured resource pool in a perceptual manner, or selected according to resources allocated by the network device.
  • the second terminal device 2-5 may randomly select part or all of the resources of the first auxiliary link reserved for it for data transmission.
  • FIG. 6 is a schematic flowchart of another embodiment of the auxiliary link communication method provided by the present application. As shown in Figure 6 and Figure 7, the method provided in this embodiment includes:
  • Step 201 The second terminal device receives the information of the first secondary link resource sent by the first terminal device; the first secondary link resource is the secondary link resource reserved for use by the second terminal device;
  • Step 202 The second terminal device obtains the first auxiliary link resource according to the information of the first auxiliary link resource.
  • the first terminal device obtains the first auxiliary link resource reserved for the second terminal device, which may be obtained from the second auxiliary link resource scheduled and allocated by the network device, or from the configured resource pool through autonomous sensing Way to get.
  • the first terminal device before acquiring the first auxiliary link resource from the second auxiliary link resource allocated by the network device scheduling, the first terminal device receives the information of the second auxiliary link resource sent by the network device.
  • the second secondary link resource is, for example, the resource allocated by the first terminal device and reserved for at least one second terminal device.
  • the first terminal device selects some resources from the second secondary link resources and reserves it for the current second terminal device.
  • the terminal device, or, the second auxiliary link resource is a resource allocated by the network device to the current second terminal device.
  • the resource pool may be a resource pool as shown in FIG. 2.
  • the first terminal device obtains the resource reserved for the second terminal device from the resource pool through autonomous sensing, and the resource may not be used by other terminal devices, and/ Or, there are no resources allocated to other terminal devices. Further, the resource may also be a resource with less interference.
  • the first secondary link resource includes frequency domain resources and time domain resources; the frequency domain resources include at least one subchannel, and the time domain resources include at least one time slot.
  • it includes at least two sub-channels that are continuous or discontinuous in the frequency domain, and at least two time slots that are continuous or discontinuous in the time domain.
  • the first terminal device may actively obtain the reserved first auxiliary link resource for the second terminal device and send the information of the first auxiliary link resource to the second terminal device, or after receiving a resource request sent by the second terminal device Then, the first auxiliary link resource is acquired and the information of the first auxiliary link resource is sent to the second terminal device.
  • the method before step 201, the method further includes:
  • the second terminal device sends a resource request to the first terminal device; the resource request is used to request the first terminal device to send information about the first secondary link resource reserved for the second terminal device information.
  • the first terminal device After acquiring the first auxiliary link resource reserved for the second terminal device, the first terminal device sends the information of the first auxiliary link resource to the second terminal device, and the second terminal device receives the information sent by the first terminal device And obtain the first auxiliary link resource according to the information of the first auxiliary link resource, and send data according to the first auxiliary link resource to communicate with other terminal devices. For example, the second terminal device selects all or part of the first auxiliary link resources to send data.
  • the first terminal device transmits the information of the first secondary link resource to the second terminal device through a secondary link physical layer control channel (physical sidelink control channel, PSCCH for short).
  • a secondary link physical layer control channel physical sidelink control channel, PSCCH for short.
  • the receiving, by the second terminal device, the information of the first secondary link resource sent by the first terminal device includes:
  • the second terminal device uses a broadcast service identifier to receive the information of the first auxiliary link resource broadcasted by the first terminal device; or,
  • the second terminal device uses the multicast user service identifier corresponding to the second terminal device to receive the information of the first auxiliary link resource multicast sent by the first terminal device; or,
  • the second terminal device uses the user service identifier of the second terminal device to receive the information of the first auxiliary link resource unicast sent by the first terminal device.
  • the method further includes:
  • the second terminal device randomly selects a second auxiliary link resource from the first auxiliary link resource, and uses the second auxiliary link resource to transmit data; the first auxiliary link resource includes the second auxiliary link Road resources.
  • the meaning of the second secondary link resource here is different from that of the second secondary link resource on the side of the first terminal device.
  • the second secondary link resource refers to the second terminal device in the first secondary link resource.
  • the randomly selected secondary link resource, that is, the second secondary link resource may be all or part of the first secondary link resource.
  • the information of the first secondary link resource is carried in the secondary link control information SCI.
  • the SCI includes a first SCI field and a second SCI field
  • the first SCI field carries information about the first auxiliary link resource
  • the second SCI field carries at least one of the following identifiers : A broadcast service identifier, a multicast user service identifier corresponding to the second terminal device, or a user service identifier of the second terminal device.
  • the receiving, by the second terminal device, the information of the first secondary link resource sent by the first terminal device includes:
  • the second terminal device receives time slot offset information, where the time slot offset information is used to indicate the first of the first auxiliary link resource and the time slot of the SCI carrying the information of the first auxiliary link resource The offset between time slots.
  • the method in this embodiment is similar to the method in the embodiment on the first terminal device side, and its implementation principles and technical effects are similar, and will not be repeated here.
  • FIG. 8 is a structural diagram of an embodiment of the first terminal device provided by this application. As shown in FIG. 8, the first terminal device of this embodiment includes:
  • the obtaining module 801 is configured to obtain the first auxiliary link resource reserved for the second terminal device;
  • the sending module 802 is configured to send the information of the first auxiliary link resource to the second terminal device, so that the second terminal device obtains the first auxiliary link resource information according to the information of the first auxiliary link resource.
  • Link resources In a possible implementation manner, the sending module 802 is configured to:
  • the broadcast service identifier is used to send the information of the first auxiliary link resource to the second terminal device by broadcasting.
  • the broadcast service identifier is used to indicate that the second terminal device receives the first terminal device to broadcast the The identifier corresponding to the information of the first auxiliary link resource; or,
  • the multicast user service identifier corresponding to the second terminal device is used to send the information of the first auxiliary link resource to the second terminal device in a multicast manner, and the multicast user service identifier is used to indicate a
  • the group of the second terminal device receives the identifier corresponding to the information of the first auxiliary link resource multicasted by the first terminal device; or,
  • the user service identifier of the second terminal device is used to send the information of the first auxiliary link resource to the second terminal device in a unicast manner, and the user service identifier of the second terminal device is used to indicate the second terminal device.
  • the second terminal device receives the identifier corresponding to the information of the first auxiliary link resource unicast sent to the first terminal device.
  • the information of the first secondary link resource is carried in the secondary link control information SCI.
  • the SCI includes a first SCI field and a second SCI field
  • the first SCI field carries information about the first auxiliary link resource
  • the second SCI field carries at least the following An identifier: a broadcast service identifier, a corresponding multicast user service identifier of the second terminal device, or a user service identifier of the second terminal device.
  • the first secondary link resource includes a frequency domain resource and a time domain resource; the frequency domain resource includes at least one subchannel, and the time domain resource includes at least one time slot.
  • the sending module 802 is configured to:
  • time slot offset information is used to indicate that the time slot of the SCI carrying the information of the first secondary link resource and the first secondary link resource are The offset between slots.
  • the obtaining module 801 is used to:
  • the first terminal device obtains the first auxiliary link resource from the second auxiliary link resource allocated by the network device; or,
  • the first terminal device obtains the first auxiliary link resource from the configured resource pool in an autonomous sensing manner.
  • the obtaining module 801 is further used for:
  • the first terminal device receives a resource request from the second terminal device; the resource request is used to request the first terminal device to send the first secondary link resource reserved for the second terminal device Information.
  • the first terminal device of this embodiment may be used to execute the technical solutions of the foregoing method embodiments, and its implementation principles and technical effects are similar, and will not be repeated here.
  • FIG. 9 is a structural diagram of an embodiment of a second terminal device provided by this application. As shown in FIG. 9, the second terminal device of this embodiment includes:
  • the receiving module 901 is configured to receive information about the first secondary link resource sent by the first terminal device; the first secondary link resource is the secondary link resource reserved for use by the second terminal device;
  • the processing module 902 is configured to obtain the first auxiliary link resource according to the information of the first auxiliary link resource.
  • the receiving module 901 is configured to:
  • the second terminal device uses a broadcast service identifier to receive the information of the first auxiliary link resource broadcasted by the first terminal device; or,
  • the second terminal device uses the multicast user service identifier corresponding to the second terminal device to receive the information of the first auxiliary link resource multicast sent by the first terminal device; or,
  • the second terminal device uses the user service identifier of the second terminal device to receive the information of the first auxiliary link resource unicast sent by the first terminal device.
  • processing module 902 is further configured to:
  • the second terminal device randomly selects a second auxiliary link resource from the first auxiliary link resource, and uses the second auxiliary link resource to transmit data; the first auxiliary link resource includes the second auxiliary link Road resources.
  • the information of the first secondary link resource is carried in the secondary link control information SCI.
  • the SCI includes a first SCI field and a second SCI field
  • the first SCI field carries information about the first auxiliary link resource
  • the second SCI field carries at least the following An identifier: a broadcast service identifier, a multicast user service identifier corresponding to the second terminal device, or a user service identifier of the second terminal device.
  • the receiving module 901 is configured to:
  • Receive time slot offset information where the time slot offset information is used to indicate the deviation between the time slot of the SCI carrying the information of the first secondary link resource and the first time slot in the first secondary link resource shift.
  • the second terminal device of this embodiment may be used to execute the technical solutions of the foregoing method embodiments, and its implementation principles and technical effects are similar, and will not be repeated here.
  • FIG. 10 is a structural diagram of another embodiment of the first terminal device provided by this application. As shown in FIG. 10, the first terminal device includes:
  • a communication interface 1003 which is used to implement communication with other devices.
  • the above-mentioned components can communicate via one or more buses.
  • the processor 1001 is configured to execute the corresponding method in the foregoing method embodiment by executing the executable instruction.
  • the executable instruction For the specific implementation process, please refer to the foregoing method embodiment, which will not be repeated here.
  • FIG. 11 is a structural diagram of another embodiment of a second terminal device provided by this application. As shown in FIG. 11, the second terminal device includes:
  • a communication interface 1103 which is used to implement communication with other devices.
  • the above-mentioned components can communicate via one or more buses.
  • the processor 1101 is configured to execute the corresponding method in the foregoing method embodiment by executing the executable instruction.
  • the executable instruction For the specific implementation process, refer to the foregoing method embodiment, which will not be repeated here.
  • the embodiments of the present application also provide a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the corresponding method in the foregoing method embodiment is implemented.
  • the specific implementation process refer to the foregoing method
  • the implementation principles and technical effects are similar, so I won’t repeat them here.

Abstract

本申请提供一种辅链路通信方法、设备和存储介质，该方法包括：第一终端设备获取为第二终端设备预留的第一辅链路资源；所述第一终端设备向所述第二终端设备发送所述第一辅链路资源的信息，以使所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源。本申请实施例的方法中第一终端设备可以根据所在区域的资源占用情况，获取为第二终端设备预留的第一辅链路资源，第二终端设备根据为其预留的第一辅链路资源发送数据，提高了通信的可靠性以及资源利用率。

Description

辅链路通信方法、设备和存储介质
本申请要求于2020年01月21日提交中国专利局、申请号为202010070301.7、申请名称为“辅链路通信方法、设备和存储介质”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种辅链路通信方法、设备和存储介质。
背景技术
随着通信技术的发展，新空口(New Radio，NR)车联网(Vehicle to Everything，V2X)作为R16(Release 16)版本的一个关键技术方向正在进行研究。NR V2X作为长期演进(Long Term Evolution，LTE)V2X技术的增强是使能车联网的关键技术手段。
在LTE V2X中，为进一步降低辅链路终端的复杂度和耗电，对于车对行人V2P通信，辅链路终端可以采用随机资源选择的方式。当辅链路终端有数据发送时，直接在网络配置或预配置的资源池中随机选择合适大小的资源进行发送。该方法导致辅链路终端之间发生资源碰撞，可靠性低。
发明内容
本申请提供一种辅链路通信方法、设备和存储介质，以提高通信的可靠性和资源利用率。
第一方面，本申请提供一种辅链路通信方法，包括：
第一终端设备获取为第二终端设备预留的第一辅链路资源；
所述第一终端设备向所述第二终端设备发送所述第一辅链路资源的信息，以使所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源。
第二方面，本申请提供一种辅链路通信方法，包括：
第二终端设备接收第一终端设备发送的第一辅链路资源的信息；所述第一辅链路资源为预留给所述第二终端设备使用的辅链路资源；
所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源。
第三方面，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现第一方面中任一项所述的方法。
第四方面，本申请实施例提供一种第一终端设备，包括：
处理器；以及
存储器，用于存储所述处理器的可执行指令；
其中，所述处理器配置为经由执行所述可执行指令来执行第一方面中任一项所述的方法。
第五方面，本申请实施例提供一种第二终端设备，包括：
处理器；以及
存储器，用于存储所述处理器的可执行指令；
其中，所述处理器配置为经由执行所述可执行指令来执行第二方面中任一项所述的方法。
本申请实施例提供的辅链路通信方法、设备和存储介质，第一终端设备获取为第二终端设备预留的第一辅链路资源；所述第一终端设备向所述第二终端设备发送所述第一辅链路资源的信息，以使所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源，第一终端设备获取为第二终端设备预留的第一辅链路资源，第一辅链路资源是根据所在区域的资源占用情况分配的，并将该第一辅链路资源的信息发送给第二终端设备，第二终端设备根据第一辅链路资源的信息获取所述第一辅链路资源，并根据为其预留的第一辅链路资源发送数据，提高了通信的可靠性以及资源利用率。
附图说明
图1为本申请一实施例提供的应用场景图；
图2为本申请一实施例提供的资源池示意图；
图3是本申请提供的辅链路通信方法一实施例的流程示意图；
图4是本申请提供的辅链路通信方法一实施例的原理示意图；
图5是本申请提供的方法一实施例的场景示意图；
图6是本申请提供的辅链路通信方法另一实施例的流程示意图；
图7是本申请提供的辅链路通信方法一实施例的交互流程示意图；
图8是本申请提供的第一终端设备一实施例的结构示意图；
图9是本申请提供的第二终端设备一实施例的结构示意图；
图10是本申请提供的第一终端设备另一实施例的结构示意图；
图11是本申请提供的第二终端设备另一实施例的结构示意图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
本申请的说明书和权利要求书及所述附图中的术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
首先对本申请所涉及的应用场景进行介绍：
本申请实施例的方法，适用于V2X场景，例如车对行人V2P场景中，车对行人 V2P属于V2X技术的一种，通过行人的终端设备与车载设备之间信息交换，防止车辆与行人之间发生碰撞。V2P可以借助于智能手机或智能穿戴设备等终端设备检测行人位置、方向、速度，并通过短波通讯技术，获取周围车辆的位置、方向及速度，若计算后认为两者或多者保持原有状态继续运动会发生碰撞，则会在用户的终端设备上发出警告信息。同时车辆的车载设备在接收到用户的终端设备发送的相关信息后，智能辅助驾驶系统也会通过声音、图像等提示驾驶员前方的危险。
在辅链路sidelink中，两个终端设备之间可以直接发送数据，而不需要先把数据发送给网络设备，再通过网络设备的转发，再发给接收端的终端设备。
图1为本申请一实施例提供的网络架构示意图，本申请提供的技术方案基于如图1所示的网络架构，该网络架构中包括第一终端设备、至少一个第二终端设备，示例性的，图1中示出了一个第一终端设备和两个第二终端设备。
第一终端设备可以为辅链路终端中的路侧单元(Road Side Unit，简称RSU)，例如布置在十字路口的路侧单元，还可以为对功耗不敏感的辅链路终端，第二终端设备可以为对功耗敏感或不敏感的辅链路终端，例如行人的手机、智能穿戴设备等，或车载设备。
V2X技术包含两种资源获取方式，一种方式是需要网络设备(如基站)进行资源调度的资源分配方式，对应于LTE V2X中的模式3和NR V2X中的模式1，另一种方式是基于感知的资源选择，是不需要网络设备进行资源调度的资源分配方式，包含LTE V2X中的模式4和NR V2X中的模式2，以及部分感知的资源选择方法。在LTE V2X中，为进一步降低辅链路终端的复杂度和耗电，对于车对行人V2P通信，辅链路终端可以采用随机资源选择的方式。当辅链路终端有数据发送时，直接在网络配置或预配置的资源池中随机选择合适大小的资源进行发送(无需通过感知进行资源选择)。该方法导致辅链路终端之间发生资源碰撞，可靠性低。
如图2所示，是一组资源池，时域的粒度为一组时隙(slot),频域的粒度为一组子信道(subchannel),一组subchannel包含M个资源块RB，M是高层配置的。终端设备在资源选择的时候，根据数据包的大小，确定需要L个subchannel进行传输。选择的传输资源为资源池中的某个子帧subframe中的连续的L个subchannel。如图2中划斜线部分为M＝3的一组传输资源。
本申请实施例的方法，根据第二终端设备所在区域的资源占用情况进行灵活调整，获取为第二终端设备预留的辅链路资源，该辅链路资源为其他终端设备没有占用的资源，或，没有给其他终端设备分配的资源，提高通信可靠性，以及资源利用率。
下面以具体的实施例对本申请的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例不再赘述。
图3是本申请提供的辅链路通信方法一实施例的流程示意图。如图3所示，本实施例提供的方法，包括：
步骤101、第一终端设备获取为第二终端设备预留的第一辅链路资源；
具体的，第一终端设备获取为第二终端设备预留的第一辅链路资源，可以从网络设备调度分配的第二辅链路资源中获取，或，从网络设备配置或预配置的资源池 中通过自主感知方式获取。
在一实施例中，从网络设备调度分配的第二辅链路资源中获取第一辅链路资源之前，第一终端设备接收网络设备发送的第二辅链路资源的信息。
其中，第二辅链路资源例如为第一终端设备调度分配的为至少一个第二终端设备预留的资源，第一终端设备从第二辅链路资源中选择部分资源给当前的第二终端设备，或，第二辅链路资源为网络设备分配给当前的第二终端设备的资源。
资源池可以为如图2所示的资源池，第一终端设备从资源池中通过自主感知方式获取为第二终端设备预留的资源，该资源可以是没有被其他终端设备使用的，和/或，没有预留给其他终端设备的资源。进一步，该资源还可以是干扰较小的资源。
其中，第一辅链路资源包括频域资源和时域资源；频域资源包括至少一个子信道，时域资源包括至少一个时隙。
例如，包含频域上连续或不连续的至少两个子信道，时域上连续或不连续的至少两个时隙。
第一终端设备可以主动为第二终端设备获取预留第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备，或者是在接收到第二终端设备发送资源请求后获取第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备。
在一实施例中，步骤101之前，还包括：
所述第一终端设备接收来自所述第二终端设备的资源请求；所述资源请求用于请求所述第一终端设备发送为所述第二终端设备预留的所述第一辅链路资源的信息。
步骤102、第一终端设备向第二终端设备发送第一辅链路资源的信息，以使第二终端设备根据第一辅链路资源的信息获取第一辅链路资源。
具体的，第一终端设备在获取到为第二终端设备预留的第一辅链路资源后，将该第一辅链路资源的信息发送给第二终端设备，第二终端设备接收第一终端设备发送的该第一辅链路资源的信息，并根据该第一辅链路资源的信息获取第一辅链路资源，根据第一辅链路资源发送数据，与其他终端设备通信。例如第二终端设备选择全部或部分第一辅链路资源发送数据。
在一实施例中，第一终端设备通过辅链路物理层控制信道(physical sidelink control channel，简称PSCCH)向第二终端设备发送第一辅链路资源的信息。
本实施例的方法，第一终端设备可以根据所在区域的资源占用情况，获取为第二终端设备预留的第一辅链路资源，并将该第一辅链路资源的信息发送给第二终端设备，第二终端设备根据第一辅链路资源的信息获取所述第一辅链路资源，并根据为其预留的第一辅链路资源发送数据，提高了通信的可靠性以及资源利用率。
在上述实施例的基础上，步骤102可以通过如下几种方式实现：
一种实现方式：
第一终端设备采用广播业务标识，通过广播的方式向第二终端设备发送第一辅链路资源的信息，广播业务标识用来表示第二终端设备接收第一终端设备广播第一辅链路资源的信息所对应的标识。
具体的，第一终端设备通过广播的方式向第二终端设备发送第一辅链路资源的 信息，第二终端设备采用对应的广播业务标识接收该第一辅链路资源的信息，广播业务标识可以记为destination ID。
该方式中，可以是第一终端设备主动为第二终端设备获取预留的第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备。
另一种实现方式：
第一终端设备采用第二终端设备对应的组播用户业务标识，通过组播的方式向第二终端设备发送第一辅链路资源的信息，组播用户业务标识用来表示一组第二终端设备接收第一终端设备组播的第一辅链路资源的信息所对应的标识。
具体的，第一终端设备通过组播的方式向第二终端设备发送第一辅链路资源的信息，第二终端设备采用对应的组播用户业务标识接收该第一辅链路资源的信息，组播用户业务标识可以记为group ID。
该方式中，第一终端设备可以主动为第二终端设备获取预留的第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备，或者是在接收到第二终端设备发送资源请求后获取第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备。
又一种实现方式：
第一终端设备采用第二终端设备的用户业务标识，通过单播的方式向第二终端设备发送第一辅链路资源的信息，第二终端设备的用户业务标识用来表示第二终端设备接收第一终端设备向其单播发送的第一辅链路资源的信息所对应的标识。
具体的，第一终端设备通过单播的方式向第二终端设备发送第一辅链路资源的信息，第二终端设备采用该第二终端设备的用户业务标识接收该第一终端设备向其单播发送的第一辅链路资源的信息，第二终端设备的用户业务标识可以记为destination ID。
该方式中，第一终端设备可以主动为第二终端设备获取预留的第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备，或者是在接收到第二终端设备发送资源请求后获取第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备。
上述业务可以指第一终端设备向至少一个第二终端设备发送辅链路资源的信息的业务。
在一实施例中，第一辅链路资源的信息携带在辅链路控制信息(sidelink control information，简称SCI)中。SCI由PSCCH承载，SCI中还可以包含上述任一业务标识。
在一实施例中，SCI包括第一SCI字段和第二SCI字段，第一SCI字段携带所述第一辅链路资源的信息，所述第二SCI字段携带以下至少一项标识：广播业务标识、所述第二终端设备的对应的组播用户业务标识或所述第二终端设备的用户业务标识。
第一终端设备将该第一辅链路资源的信息包含在辅链路控制信息SCI中，可选的，可以沿用NR V2X中SCI指示其关联数据信道占用资源信息的格式，在本申请实施例中第一终端设备用SCI指示要预留并发送给第二终端设备使用的一组辅链路 资源。
因第一终端设备仅传递辅链路资源的信息给第二终端设备，而无数据发送给第二终端设备，因此，在一实施例中，第一终端设备采用一个子信道传输SCI的方式，即采用频域上的一个子信道来发送SCI，包含第一SCI字段(或称为1st stage SCI)和第二SCI字段(或称为2nd stage SCI),第一SCI字段携带第一辅链路资源的信息，第二SCI字段包含对应业务标识。
如图4所示，第一终端设备在单个子信道上发送SCI(占用图4中深灰色的资源块)，周期为P，SCI中携带为第二终端设备预留的第一辅链路资源的信息，即SCI中指示的是第一辅链路资源的信息，第二终端设备监听第一终端发送的SCI，获得该第一辅链路资源的信息，获取该第一辅链路资源(图4中浅灰色的资源块)，并从该第一辅链路资源中选择全部或部分资源发送辅链路数据。其中，SCI中还可以指示周期P。
第二终端设备根据选择的资源的时频域信息确定待发送的SCI中对应域的取值，第二终端设备在所选择的资源上发送SCI和数据。
本实施例的方法，第一终端设备可以根据所在区域的资源占用情况，获取为第二终端设备预留的第一辅链路资源，并通过广播、组播或单播的方式将该第一辅链路资源的信息发送给第二终端设备，第二终端设备根据第一辅链路资源的信息获取所述第一辅链路资源，并根据为其预留的第一辅链路资源发送数据，提高了通信的可靠性以及资源利用率。
在一实施例中，第一终端设备发送第一辅链路资源的信息，可以通过如下方式实现：
所述第一终端设备向所述第二终端设备发送时隙偏移信息，所述时隙偏移信息用于指示携带所述第一辅链路资源的信息的SCI所在时隙与第一辅链路资源中第一个时隙之间的偏移。
具体的，第一辅链路资源的信息可以通过时隙偏移进行指示，该时隙偏移信息可以用于指示携带所述第一辅链路资源的信息的指示信息所在时隙与第一辅链路资源中第一个时隙所在的时隙偏移。例如指示信息为SCI，则可该时隙偏移为SCI所在时隙与第一辅链路资源中第一个时隙所在的时隙偏移。
在一实施例中，第一辅链路资源中其它时隙的时域资源指示方法可以采用现有R16 V2X已有的方案。第一辅链路资源包括的频域资源的指示方法可以采用现有R16V2X已有的方案。
在一实施例中，如图5所示，第一终端设备1在本实施例中可以为路侧单元，可以通过PC5口向P用户(第二终端设备)传输预留的第一辅链路资源的信息。第一终端设备设置在某十字路口。
第二终端设备2-5为P用户，当其具有PC5口接收能力时，可以接收第一终端设备1发送第一辅链路资源的信息。当第二终端设备2-5行驶到该十字路口附近时，为了降低和车辆的碰撞风险，可以将自己的位置信息、速度信息或行进方向等至少一项信息发送给其它车辆，发送上述信息的资源可以根据路侧设备发送的第一辅链路资源的信息进行选择。
第一终端设备可以通过广播、单播或组播的方式向第二终端设备2-5中的至少一个第二终端设备发送为其预留的第一辅链路资源的信息，该第一辅链路资源可以是第一终端设备通过感知的方式从配置的资源池中选择的，或是根据网络设备分配的资源选择的。
第二终端设备2-5可以在为其预留的第一辅链路资源中随机选择部分或全部资源进行数据发送。
图6是本申请提供的辅链路通信方法另一实施例的流程示意图。如图6、图7所示，本实施例提供的方法，包括：
步骤201、第二终端设备接收第一终端设备发送的第一辅链路资源的信息；第一辅链路资源为预留给第二终端设备使用的辅链路资源；
步骤202、第二终端设备根据第一辅链路资源的信息获取第一辅链路资源。
具体的，第一终端设备获取为第二终端设备预留的第一辅链路资源，可以从网络设备调度分配的第二辅链路资源中获取，或，从配置的资源池中通过自主感知方式获取。
在一实施例中，从网络设备调度分配的第二辅链路资源中获取第一辅链路资源之前，第一终端设备接收网络设备发送的第二辅链路资源的信息。
其中，第二辅链路资源例如为第一终端设备分配的为至少一个第二终端设备预留的资源，第一终端设备从第二辅链路资源中选择部分资源预留给当前的第二终端设备，或，第二辅链路资源为网络设备分配给当前的第二终端设备的资源。
资源池可以为如图2所示的资源池，第一终端设备从资源池中通过自主感知方式获取为第二终端设备预留的资源，该资源可以是没有被其他终端设备使用的，和/或，没有分配给其他终端设备的资源。进一步，该资源还可以是干扰较小的资源。
其中，第一辅链路资源包括频域资源和时域资源；频域资源包括至少一个子信道，时域资源包括至少一个时隙。
例如，包含频域上连续或不连续的至少两个子信道，时域上连续或不连续的至少两个时隙。
第一终端设备可以主动为第二终端设备获取预留的第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备，或者是在接收到第二终端设备发送资源请求后获取第一辅链路资源并将第一辅链路资源的信息发送给第二终端设备。
在一实施例中，步骤201之前，还包括：
所述第二终端设备向所述第一终端设备发送资源请求；所述资源请求用于请求所述第一终端设备发送为所述第二终端设备预留的所述第一辅链路资源的信息。
第一终端设备在获取到为第二终端设备预留的第一辅链路资源后，将该第一辅链路资源的信息发送给第二终端设备，第二终端设备接收第一终端设备发送的该第一辅链路资源的信息，并根据该第一辅链路资源的信息获取第一辅链路资源，根据第一辅链路资源发送数据，与其他终端设备通信。例如第二终端设备选择全部或部分第一辅链路资源发送数据。
在一实施例中，第一终端设备通过辅链路物理层控制信道(physical sidelink control channel，简称PSCCH)向第二终端设备发送第一辅链路资源的信息。
在一实施例中，所述第二终端设备接收第一终端设备发送的第一辅链路资源的信息，包括：
所述第二终端设备采用广播业务标识，接收所述第一终端设备广播发送的所述第一辅链路资源的信息；或，
所述第二终端设备采用所述第二终端设备对应的组播用户业务标识，接收所述第一终端设备组播发送的所述第一辅链路资源的信息；或，
所述第二终端设备采用所述第二终端设备的用户业务标识，接收所述第一终端设备单播发送的所述第一辅链路资源的信息。
在一实施例中，所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源之后，还包括：
所述第二终端设备在所述第一辅链路资源中随机选择第二辅链路资源，利用第二辅链路资源传输数据；所述第一辅链路资源包括所述第二辅链路资源。
此处的第二辅链路资源与第一终端设备侧的第二辅链路资源代表的含义不同，此处第二辅链路资源指的是第二终端设备在第一辅链路资源中随机选择的辅链路资源，即第二辅链路资源可以是第一辅链路资源的全部或部分资源。
在一实施例中，所述第一辅链路资源的信息携带在辅链路控制信息SCI中。
在一实施例中，所述SCI包括第一SCI字段和第二SCI字段，所述第一SCI字段携带所述第一辅链路资源的信息，所述第二SCI字段携带以下至少一项标识：广播业务标识、所述第二终端设备对应的组播用户业务标识或所述第二终端设备的用户业务标识。
在一实施例中，所述第二终端设备接收第一终端设备发送的第一辅链路资源的信息，包括：
所述第二终端设备接收时隙偏移信息，所述时隙偏移信息用于指示携带所述第一辅链路资源的信息的SCI所在时隙与第一辅链路资源中第一个时隙之间的偏移。
本实施例的方法与第一终端设备侧实施例的方法，其实现原理和技术效果类似，此处不再赘述。
图8为本申请提供的第一终端设备一实施例的结构图，如图8所示，本实施例的第一终端设备，包括：
获取模块801，用于获取为第二终端设备预留的第一辅链路资源；
发送模块802，用于向所述第二终端设备发送所述第一辅链路资源的信息，以使所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源。在一种可能的实现方式中，所述发送模块802，用于：
采用广播业务标识，通过广播的方式向所述第二终端设备发送所述第一辅链路资源的信息，所述广播业务标识用来表示第二终端设备接收所述第一终端设备广播所述第一辅链路资源的信息所对应的标识；或，
采用所述第二终端设备对应的组播用户业务标识，通过组播的方式向所述第二终端设备发送所述第一辅链路资源的信息，所述组播用户业务标识用来表示一组第二终端设备接收所述第一终端设备组播的所述第一辅链路资源的信息所对应的标识；或，
采用所述第二终端设备的用户业务标识，通过单播的方式向所述第二终端设备发送所述第一辅链路资源的信息，所述第二终端设备的用户业务标识用来表示第二终端设备接收第一终端设备向其单播发送的第一辅链路资源的信息所对应的标识。
在一种可能的实现方式中，所述第一辅链路资源的信息携带在辅链路控制信息SCI中。
在一种可能的实现方式中，所述SCI包括第一SCI字段和第二SCI字段，所述第一SCI字段携带所述第一辅链路资源的信息，所述第二SCI字段携带以下至少一项标识：广播业务标识、所述第二终端设备的对应的组播用户业务标识或所述第二终端设备的用户业务标识。
在一种可能的实现方式中，所述第一辅链路资源包括频域资源和时域资源；所述频域资源包括至少一个子信道，所述时域资源包括至少一个时隙。
在一种可能的实现方式中，所述发送模块802，用于：
向所述第二终端设备发送时隙偏移信息，所述时隙偏移信息用于指示携带所述第一辅链路资源的信息的SCI所在时隙与第一辅链路资源中第一个时隙之间的偏移。
在一种可能的实现方式中，获取模块801，用于：
所述第一终端设备从网络设备分配的第二辅链路资源中获取所述第一辅链路资源；或，
所述第一终端设备通过自主感知方式从配置的资源池中获取所述第一辅链路资源。
在一种可能的实现方式中，所述获取模块801，还用于：
所述第一终端设备接收来自所述第二终端设备的资源请求；所述资源请求用于请求所述第一终端设备发送为所述第二终端设备预留的所述第一辅链路资源的信息。
本实施例的第一终端设备，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
图9为本申请提供的第二终端设备一实施例的结构图，如图9所示，本实施例的第二终端设备，包括：
接收模块901，用于接收第一终端设备发送的第一辅链路资源的信息；所述第一辅链路资源为预留给所述第二终端设备使用的辅链路资源；
处理模块902，用于根据所述第一辅链路资源的信息获取所述第一辅链路资源。
在一种可能的实现方式中，所述接收模块901，用于：
所述第二终端设备采用广播业务标识，接收所述第一终端设备广播发送的所述第一辅链路资源的信息；或，
所述第二终端设备采用所述第二终端设备对应的组播用户业务标识，接收所述第一终端设备组播发送的所述第一辅链路资源的信息；或，
所述第二终端设备采用所述第二终端设备的用户业务标识，接收所述第一终端设备单播发送的所述第一辅链路资源的信息。
在一种可能的实现方式中，所述处理模块902，还用于：
所述第二终端设备在所述第一辅链路资源中随机选择第二辅链路资源，利用第二辅链路资源传输数据；所述第一辅链路资源包括所述第二辅链路资源。
在一种可能的实现方式中，所述第一辅链路资源的信息携带在辅链路控制信息SCI中。
在一种可能的实现方式中，所述SCI包括第一SCI字段和第二SCI字段，所述第一SCI字段携带所述第一辅链路资源的信息，所述第二SCI字段携带以下至少一项标识：广播业务标识、所述第二终端设备对应的组播用户业务标识或所述第二终端设备的用户业务标识。
在一种可能的实现方式中，所述接收模块901，用于：
接收时隙偏移信息，所述时隙偏移信息用于指示携带所述第一辅链路资源的信息的SCI所在时隙与第一辅链路资源中第一个时隙之间的偏移。
本实施例的第二终端设备，可以用于执行上述方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。
图10为本申请提供的第一终端设备设备另一实施例的结构图，如图10所示，该第一终端设备包括：
处理器1001，以及，用于存储处理器1001的可执行指令的存储器1002。
可选的，还可以包括：通信接口1003，用于实现与其他设备的通信。
上述部件可以通过一条或多条总线进行通信。
其中，处理器1001配置为经由执行所述可执行指令来执行前述方法实施例中对应的方法，其具体实施过程可以参见前述方法实施例，此处不再赘述。
图11为本申请提供的第二终端设备设备另一实施例的结构图，如图11所示，该第二终端设备包括：
处理器1101，以及，用于存储处理器1101的可执行指令的存储器1102。
可选的，还可以包括：通信接口1103，用于实现与其他设备的通信。
上述部件可以通过一条或多条总线进行通信。
其中，处理器1101配置为经由执行所述可执行指令来执行前述方法实施例中对应的方法，其具体实施过程可以参见前述方法实施例，此处不再赘述。
本申请实施例中还提供一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现前述方法实施例中对应的方法，其具体实施过程可以参见前述方法实施例，其实现原理和技术效果类似，此处不再赘述。
本领域技术人员在考虑说明书及实践这里公开的发明后，将容易想到本公开的其它实施方案。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求书指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求书来限制。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (17)

  1. 一种辅链路通信方法，其特征在于，包括：
    第一终端设备获取为第二终端设备预留的第一辅链路资源；
    所述第一终端设备向所述第二终端设备发送所述第一辅链路资源的信息，以使所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源。
  2. 根据权利要求1所述的方法，其特征在于，所述第一终端设备向所述第二终端设备发送所述第一辅链路资源的信息，包括：
    所述第一终端设备采用广播业务标识，通过广播的方式向所述第二终端设备发送所述第一辅链路资源的信息，所述广播业务标识用来表示第二终端设备接收所述第一终端设备广播所述第一辅链路资源的信息所对应的标识；或，
    所述第一终端设备采用所述第二终端设备对应的组播用户业务标识，通过组播的方式向所述第二终端设备发送所述第一辅链路资源的信息，所述组播用户业务标识用来表示一组第二终端设备接收所述第一终端设备组播的所述第一辅链路资源的信息所对应的标识；或，
    所述第一终端设备采用所述第二终端设备的用户业务标识，通过单播的方式向所述第二终端设备发送所述第一辅链路资源的信息，所述第二终端设备的用户业务标识用来表示第二终端设备接收第一终端设备向其单播发送的第一辅链路资源的信息所对应的标识。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一辅链路资源的信息携带在辅链路控制信息SCI中。
  4. 根据权利要求3所述的方法，其特征在于，所述SCI包括第一SCI字段和第二SCI字段，所述第一SCI字段携带所述第一辅链路资源的信息，所述第二SCI字段携带以下至少一项标识：广播业务标识、所述第二终端设备的对应的组播用户业务标识或所述第二终端设备的用户业务标识。
  5. 根据权利要求1或2所述的方法，其特征在于，所述第一辅链路资源包括频域资源和时域资源；所述频域资源包括至少一个子信道，所述时域资源包括至少一个时隙。
  6. 根据权利要求3所述的方法，其特征在于，所述第一终端设备向所述第二终端设备发送所述第一辅链路资源的信息，包括：
    所述第一终端设备向所述第二终端设备发送时隙偏移信息，所述时隙偏移信息用于指示携带所述第一辅链路资源的信息的SCI所在时隙与第一辅链路资源中第一个时隙之间的偏移。
  7. 根据权利要求1或2所述的方法，其特征在于，所述第一终端设备获取为第二终端设备预留的第一辅链路资源，包括：
    所述第一终端设备从网络设备调度的第二辅链路资源中获取所述第一辅链路资源；或，
    所述第一终端设备通过自主感知方式从网络配置或预配置的资源池中获取所述第一辅链路资源。
  8. 根据权利要求1或2所述的方法，其特征在于，所述第一终端设备向所述第二终 端设备发送所述第一辅链路资源的信息之前，还包括：
    所述第一终端设备接收来自所述第二终端设备的资源请求；所述资源请求用于请求所述第一终端设备发送为所述第二终端设备预留的所述第一辅链路资源的信息。
  9. 一种辅链路通信方法，其特征在于，包括：
    第二终端设备接收第一终端设备发送的第一辅链路资源的信息；所述第一辅链路资源为预留给所述第二终端设备使用的辅链路资源；
    所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源。
  10. 根据权利要求9所述的方法，其特征在于，所述第二终端设备接收第一终端设备发送的第一辅链路资源的信息，包括：
    所述第二终端设备采用广播业务标识，接收所述第一终端设备广播发送的所述第一辅链路资源的信息；或，
    所述第二终端设备采用所述第二终端设备对应的组播用户业务标识，接收所述第一终端设备组播发送的所述第一辅链路资源的信息；或，
    所述第二终端设备采用所述第二终端设备的用户业务标识，接收所述第一终端设备单播发送的所述第一辅链路资源的信息。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第二终端设备根据所述第一辅链路资源的信息获取所述第一辅链路资源之后，还包括：
    所述第二终端设备在所述第一辅链路资源中随机选择第二辅链路资源，利用第二辅链路资源传输数据；所述第一辅链路资源包括所述第二辅链路资源。
  12. 根据权利要求9或10所述的方法，其特征在于，所述第一辅链路资源的信息携带在辅链路控制信息SCI中。
  13. 根据权利要求12所述的方法，其特征在于，所述SCI包括第一SCI字段和第二SCI字段，所述第一SCI字段携带所述第一辅链路资源的信息，所述第二SCI字段携带以下至少一项标识：广播业务标识、所述第二终端设备对应的组播用户业务标识或所述第二终端设备的用户业务标识。
  14. 根据权利要求12所述的方法，其特征在于，所述第二终端设备接收第一终端设备发送的第一辅链路资源的信息，包括：
    所述第二终端设备接收时隙偏移信息，所述时隙偏移信息用于指示携带所述第一辅链路资源的信息的SCI所在时隙与第一辅链路资源中第一个时隙之间的偏移。
  15. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器执行时实现权利要求1-14任一项所述的方法。
  16. 一种第一终端设备，其特征在于，包括：
    处理器；以及
    存储器，用于存储所述处理器的可执行指令；
    其中，所述处理器配置为经由执行所述可执行指令来执行权利要求1-8任一项所述的方法。
  17. 一种第二终端设备，其特征在于，包括：
    处理器；以及
    存储器，用于存储所述处理器的可执行指令；
    其中，所述处理器配置为经由执行所述可执行指令来执行权利要求9-14任一项所述的方法。
PCT/CN2021/074493 2020-01-21 2021-01-29 辅链路通信方法、设备和存储介质 WO2021148042A1 (zh)

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