WO2022267898A1 - 一种资源指示方法和装置 - Google Patents

一种资源指示方法和装置 Download PDF

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Publication number
WO2022267898A1
WO2022267898A1 PCT/CN2022/097894 CN2022097894W WO2022267898A1 WO 2022267898 A1 WO2022267898 A1 WO 2022267898A1 CN 2022097894 W CN2022097894 W CN 2022097894W WO 2022267898 A1 WO2022267898 A1 WO 2022267898A1
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WIPO (PCT)
Prior art keywords
resource
control information
field
feedback
terminal
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PCT/CN2022/097894
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English (en)
French (fr)
Inventor
董蕾
苏宏家
郭文婷
卢磊
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华为技术有限公司
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Publication of WO2022267898A1 publication Critical patent/WO2022267898A1/zh

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    • 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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the technical field of wireless communication, and in particular, to a resource indication method and device.
  • D2D device-to-device
  • the application of the D2D technology can reduce the burden of the cellular network, reduce the battery power consumption of the user equipment (UE), improve the data transmission efficiency, and can well meet the service requirements.
  • the D2D technology allows multiple UEs supporting the D2D function to perform direct discovery and direct communication with or without network infrastructure.
  • the application scenario of Internet of Vehicles based on D2D technology has been proposed, but due to the consideration of security, the requirement for delay in this scenario is very high.
  • V2X communication refers to any communication between the vehicle and the outside world. Communication of things, including vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-infrastructure (V2T), vehicle-to-network communication (vehicle to network, V2N), etc.
  • V2V vehicle-to-vehicle
  • V2P vehicle-to-pedestrian
  • V2T vehicle-to-infrastructure
  • V2N vehicle-to-network communication
  • LTE-V2X as an earlier V2X protocol
  • NR V2X new radio
  • the present application provides a resource indication method and device in order to improve the data transmission performance of a V2X terminal.
  • a resource indication method may be executed by the first terminal, or by a chip having a function similar to that of the first terminal.
  • the first terminal may send the first control information and the second control information.
  • the first control information may be used to indicate the first resource; the second control information may be used to indicate the feedback resource.
  • the first resource may include a feedback resource, or the feedback resource may be used to carry feedback information corresponding to the first data carried by the first resource.
  • the first terminal may indicate the first resource and the feedback resource to the user through the first control information and the second control information.
  • the LTE-V2X device can also identify the PSFCH resource of the NR-V2X device and avoid interference with the PSFCH transmission of the NR-V2X device.
  • the first control information may include a first field.
  • the first field may be used to indicate a time domain interval between the first resource and the second resource, and the second resource may be located in the same time unit as the first control information in the time domain.
  • the first terminal may use the first field to indicate the time domain interval between the first resource and the time unit where the first control information is located, so as to indicate the first resource.
  • the first control information may include a second field; when the value of the second field is the first value, the first resource may be a resource reserved by the first terminal.
  • the first resource may be located after the second resource in the time domain, and the second resource may be located in the same time unit as the first control information in the time domain.
  • the first resource when the value of the second field is the first value, the first resource may be a reserved resource, that is, the first resource may be located after the time unit where the first control information is located.
  • the resources reserved by the first terminal can be indicated, so as to prevent other terminals from interfering with the data transmission of the first terminal.
  • the second control information may include a third field; the third field is used to indicate that the first resource includes a feedback resource.
  • the first terminal may indicate whether the first resource includes the feedback resource through the third field, so as to reserve the feedback resource.
  • the first terminal may receive feedback information corresponding to the second data on the feedback resource, where the second data is data sent by the first terminal on the second resource.
  • the feedback resources reserved by the first terminal may be used by other terminals, such as the third terminal.
  • the first terminal can indicate the reserved feedback resource, so as to prevent terminals other than the third terminal from transmitting data on the feedback resource, causing interference to the data transmission of the first terminal.
  • the second control information may include the first index and/or the second index.
  • the first index may be used to identify the source index of the third data
  • the second index may be used to identify the destination index of the third data.
  • the second control information may include at least one of a source index and a destination index used to identify the third data, so that the terminal using the feedback resource reserved by the first terminal can transmit the above third data on the feedback resource feedback information.
  • the first terminal may receive feedback information corresponding to the third data on the feedback resource.
  • the first control information may include a second field; when the value of the second field is a second value, the first resource may be a transmission resource of the second terminal; the first resource may be in the time domain Located before the second resource, the second resource may be located in the same time unit as the first control information in the time domain.
  • the first resource when the value of the second field is the second value, the first resource may be a historical resource, that is, a receiving resource of the first terminal.
  • the first terminal may use the first control information to indicate that the resource transmitted in the time unit where the first control information is located corresponds to the first resource.
  • the second control information may include a third field; the third field may be used to indicate that the second resource includes a feedback resource.
  • the first terminal may indicate that the feedback resource is a feedback resource for the data received on the first resource.
  • the first terminal may send feedback information corresponding to the first data on the feedback resource.
  • the second control information may include a third field; the third field may be used to indicate that the first resource includes a feedback resource, and the first resource may be located at the same time as the first control information in the time domain unit.
  • the first terminal may use the third field to indicate that the time unit occupied by the first control information also includes feedback resources, that is, the first terminal has also sent feedback information.
  • the second control information may include the first index and/or the second index; the first index may be used to identify the source index of the fourth data, and the second index may be used to identify the source index of the fourth data destination index.
  • the first terminal may use at least one of the source index and the destination index included in the second control information to indicate that the feedback resource of the first resource includes the transmission of the feedback of the fourth data identified by the source index and the destination index. information.
  • the first terminal may send feedback information corresponding to the fourth data on the feedback resource.
  • the first control information may further include a first field; the value of the first field is zero.
  • the first control information may further include a fourth field; the fourth field may be used to indicate the frequency domain resource occupied by the first resource.
  • a resource indication method is provided.
  • the method may be executed by the second terminal, or by a chip that functions similarly to the second terminal.
  • the second terminal receives first control information and second control information; wherein, the first control information is used to indicate the first resource; the second control information is used to indicate the feedback resource; the first resource includes the feedback resource, or the feedback resource
  • the resource is used to carry feedback information corresponding to the first data carried by the first resource.
  • the first control information includes a first field; the first field is used to indicate the time domain interval between the first resource and the second resource, and the second resource is different from the first control information in the time domain. in the same time unit.
  • the first control information includes a second field; when the value of the second field is the first value, the first resource is a resource reserved by the first terminal; the first resource is located in the second field in the time domain. After the resource, the second resource is located in the same time unit as the first control information in the time domain.
  • the second control information includes a third field; the third field is used to indicate that the first resource includes a feedback resource.
  • the second terminal sends feedback information corresponding to the second data on the feedback resource, where the second data is data sent by the first terminal on the second resource.
  • the second control information includes a first index and/or a second index; the first index is used to identify a source index of the third data, and the second index is used to identify a destination index of the third data.
  • the second terminal sends feedback information corresponding to the third data on the feedback resource.
  • the first control information includes a second field; when the value of the second field is the second value, the first resource is the transmission resource of the second terminal; the first resource is located in the second terminal in the time domain. Before the resource, the second resource is located in the same time unit as the first control information in the time domain.
  • the second control information includes a third field; the third field is used to indicate that the second resource includes a feedback resource.
  • the second terminal receives the feedback information corresponding to the first data on the feedback resource.
  • the second control information includes a third field; the third field is used to indicate that the first resource includes a feedback resource, and the first resource is located in the same time unit as the first control information in the time domain.
  • the second control information includes a first index and/or a second index; the first index is used to identify a source index of the fourth data, and the second index is used to identify a destination index of the fourth data.
  • the second terminal receives feedback information corresponding to the fourth data on the feedback resource.
  • the first control information further includes a first field; the value of the first field is zero.
  • the first control information further includes a fourth field; the fourth field is used to indicate the frequency domain resource occupied by the first resource.
  • a communication device may be used to execute the method in the foregoing first aspect or any possible implementation manner of the first aspect.
  • the communication device may include a module or unit for executing the method in the first aspect or any possible implementation manner of the first aspect, for example, including a processing unit and a transceiver unit.
  • the processing unit is configured to generate the first control information and the second control information.
  • the first control information is used to indicate the first resource; the second control information is used to indicate the feedback resource; the first resource includes the feedback resource, or the feedback resource is used to carry the feedback information corresponding to the first data carried by the first resource.
  • the transceiver unit is configured to send the first control information and the second control information.
  • the first control information includes a first field; the first field is used to indicate the time domain interval between the first resource and the second resource, and the second resource is located at the same location as the first control information in the time domain. unit of time.
  • the first control information includes a second field; when the value of the second field is the first value, the first resource is a resource reserved by the first terminal; the first resource is located after the second resource in the time domain, The second resource is located in the same time unit as the first control information in the time domain.
  • the second control information includes a third field; the third field is used to indicate that the first resource includes a feedback resource.
  • the transceiving unit is further configured to receive feedback information corresponding to the second data on the feedback resource, where the second data is data sent by the first terminal on the second resource.
  • the second control information includes a first index and/or a second index; the first index is used to identify a source index of the third data, and the second index is used to identify a destination index of the third data.
  • the transceiving unit is further configured to receive feedback information corresponding to the third data on the feedback resource.
  • the first control information includes a second field; when the value of the second field is a second value, the first resource is a transmission resource of the second terminal; the first resource is located before the second resource in the time domain, The second resource is located in the same time unit as the first control information in the time domain.
  • the second control information includes a third field; the third field is used to indicate that the second resource includes a feedback resource.
  • the transceiving unit is further configured to send feedback information corresponding to the first data on the feedback resource.
  • the second control information includes a first index and/or a second index; the first index is used to identify a source index of the fourth data, and the second index is used to identify a destination index of the fourth data.
  • the transceiving unit is further configured to send feedback information corresponding to the fourth data on the feedback resource.
  • the first control information further includes a first field; the value of the first field is zero.
  • the first control information further includes a fourth field; the fourth field is used to indicate the frequency domain resource occupied by the first resource.
  • a communication device may be used to execute the method in the foregoing second aspect or any possible implementation manner of the second aspect.
  • the communication device may include a module or unit for performing the second aspect or the method in any possible implementation manner of the second aspect, for example, including a processing unit and a transceiver unit.
  • the transceiving unit is configured to receive the first control information and the second control information.
  • the first control information is used to indicate the first resource;
  • the second control information is used to indicate the feedback resource;
  • the first resource includes the feedback resource, or the feedback resource is used to carry the feedback information corresponding to the first data carried by the first resource.
  • a processing unit configured to determine at least one of the first resource and the feedback resource.
  • the first control information includes a first field; the first field is used to indicate the time domain interval between the first resource and the second resource, and the second resource is located at the same location as the first control information in the time domain. unit of time.
  • the first control information includes a second field; when the value of the second field is the first value, the first resource is a resource reserved by the first terminal; the first resource is located after the second resource in the time domain, The second resource is located in the same time unit as the first control information in the time domain.
  • the second control information includes a third field; the third field is used to indicate that the first resource includes a feedback resource.
  • the transceiving unit is further configured to send feedback information corresponding to the second data on the feedback resource, where the second data is data sent by the first terminal on the second resource.
  • the second control information includes a first index and/or a second index; the first index is used to identify a source index of the third data, and the second index is used to identify a destination index of the third data.
  • the transceiving unit is further configured to send feedback information corresponding to the third data on the feedback resource.
  • the first control information includes a second field; when the value of the second field is a second value, the first resource is a transmission resource of the second terminal; the first resource is located before the second resource in the time domain, The second resource is located in the same time unit as the first control information in the time domain.
  • the second control information includes a third field; the third field is used to indicate that the second resource includes a feedback resource.
  • the transceiving unit is further configured to receive feedback information corresponding to the first data on the feedback resource.
  • the second control information includes a first index and/or a second index; the first index is used to identify a source index of the fourth data, and the second index is used to identify a destination index of the fourth data.
  • the transceiving unit is further configured to receive feedback information corresponding to the fourth data on the feedback resource.
  • the first control information further includes a first field; the value of the first field is zero.
  • the first control information further includes a fourth field; the fourth field is used to indicate the frequency domain resource occupied by the first resource.
  • the embodiment of the present application provides a communication device, which may be the communication device in any one of the third to fourth aspects in the above embodiments, or be set in the third to fourth aspects A chip in the communication device of any aspect.
  • the communication device includes a communication interface, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions or data
  • the processor is coupled with the memory and the communication interface, and when the processor reads the computer programs or instructions or data, the communication device is made to execute the above first aspect to the second aspect The method performed by the first terminal or the second terminal in the method embodiment of any one aspect.
  • the communication interface may be implemented through the antenna, feeder, codec, etc. in the communication device, or, if the communication device is a chip set in the first terminal or the second terminal, the communication interface may be the chip input/output interface, such as input/output pins, etc.
  • the communication device may also include a transceiver for the communication device to communicate with other devices. Exemplarily, when the communication device is the first terminal, the other device is the second terminal; or, when the communication device is the second terminal, the other device is the first terminal.
  • an embodiment of the present application provides a system-on-a-chip, where the system-on-a-chip includes a processor and may further include a memory, configured to implement the method performed by the communication device in any one of the third aspect to the fourth aspect.
  • the chip system further includes a memory, configured to store program instructions and/or data.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • an embodiment of the present application provides a communication system, where the communication system includes the communication devices described in the third aspect and the fourth aspect.
  • the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is run, implements the methods performed by the first terminal in the above aspects; or implements The method performed by the second terminal in the foregoing aspects.
  • a ninth aspect provides a computer program product, the computer program product including: computer program code, when the computer program code is executed, the method performed by the first terminal in the above aspects is executed, or the The methods performed by the second terminal in the foregoing aspects are performed.
  • FIG. 1 is a schematic diagram of various communication modes of V2X communication
  • FIG. 2A is a schematic diagram of SCI forward indication retransmission resources when PSCCH and PSSCH are transmitted on adjacent resource blocks;
  • FIG. 2B is a schematic diagram of SCI backward indicating initial transmission resources when PSCCH and PSSCH are transmitted on adjacent resource blocks;
  • FIG. 2C is a schematic diagram of SCI forward indication retransmission resources when PSCCH and PSSCH are transmitted on non-adjacent resource blocks;
  • FIG. 2D is a schematic diagram of SCI backward indicating initial transmission resources when PSCCH and PSSCH are transmitted on non-adjacent resource blocks;
  • FIG. 3A is a schematic diagram of retransmission of SL-HARQ
  • Figure 3B is a schematic diagram of PSFCH RB resources configured by the resource pool
  • FIG. 3C is a schematic diagram of the number of RBs occupied by PSFCH resources corresponding to a subchannel
  • FIG. 4 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • FIG. 5 is an exemplary flowchart of a resource indication method provided by an embodiment of the present application.
  • FIG. 6A is one of the specific time-frequency position diagrams of the PSFCH provided by the embodiment of the present application.
  • FIG. 6B is one of the specific time-frequency position diagrams of the PSFCH provided by the embodiment of the present application.
  • FIG. 6C is one of the specific time-frequency position diagrams of the PSFCH provided by the embodiment of the present application.
  • FIG. 6D is one of the schematic diagrams of the first level SCI forward indication first resource provided by the embodiment of the present application.
  • FIG. 6E is one of the schematic diagrams of the first level SCI forward indication first resource provided by the embodiment of the present application.
  • FIG. 6F is one of the schematic diagrams of the first level SCI forward indication first resource provided by the embodiment of the present application.
  • FIG. 7 is one of the schematic diagrams of the first-level SCI backward indication first resource provided by the embodiment of the present application.
  • Fig. 8 is one of the schematic diagrams of the first-level SCI backward indication first resource provided by the embodiment of the present application.
  • FIG. 9 is one of the structural schematic diagrams of the communication device provided by the embodiment of the present application.
  • FIG. 10 is one of the schematic structural diagrams of a communication device provided by an embodiment of the present application.
  • V2X communication may include communication modes such as V2V, V2P, V2I, and V2N.
  • V2X communication is aimed at high-speed equipment represented by vehicles. It is the basic technology and key technology for future scenarios that require very high communication delays. For example, it can be widely used in scenarios such as smart cars, autonomous driving, and intelligent transportation systems.
  • LTE V2X communication can support communication scenarios with and without network coverage, and its resource allocation method can adopt the network access device scheduling mode, such as the evolved universal terrestrial radio access network node B (e-utran node B, eNB) scheduling mode and UE self-selection mode.
  • e-utran node B evolved universal terrestrial radio access network node B
  • Vehicle users can send some of their own information, such as periodic events (including information such as position, speed, and intention) and some aperiodic event-triggered information to surrounding V-UEs.
  • the ground V-UE will also receive information from surrounding users in real time.
  • the intention may include turning, merging and reversing.
  • LTE V2X solves some basic requirements in V2X scenarios, but for future fully intelligent driving, autonomous driving and other application scenarios, LTE V2X cannot effectively support it.
  • 5G 5th generation mobile communication technology
  • 5G NR V2X will also develop further, such as supporting lower transmission delay and more reliable communication transmission , higher throughput, and better user experience to meet the needs of a wider range of application scenarios.
  • sidelink control information (sidelink control information, SCI) is carried in a physical layer sidelink control channel (physical sidelink control channel, PSCCH).
  • PSSCH physical sidelink control channel
  • the time-frequency resource of the physical sidelink shared channel (PSSCH) is indicated by the SCI, and the frequency resource is defined as a group of continuous subchannels with a length of L subCH , defined by the "initial transmission and repeated transmission" in the SCI.
  • the "Frequency resource location of the initial transmission and retransmission" field indicates that this field can indicate the initial subchannel index of the frequency domain resource in the sidelink resource pool and length L subCH .
  • N subCH is the total number of sub-channels corresponding to the sidelink resource pool.
  • the frequency domain resources for at most two transmissions of LTE-V2X are the same.
  • the time domain positions of the PSSCH resources for at most two transmissions are as follows: The time domain position of one of the PSSCH resources Determined by the time domain position of the current SCI, the time domain position of another PSSCH resource is determined by the "time gap between initial transmission and retransmission (Time gap between initial transmission and retransmission)" field and the "retransmission index ( Retransmission index)” field is determined.
  • LTE-V2X allows forward indication of retransmission resources during initial transmission, or backward indication of initial transmission resources during retransmission.
  • the specific time domain position is before or after the current SCI.
  • the "Time gap between initial transmission and retransmission” field is 4 bits, indicating 16 possible intervals in total
  • the "Retransmission index” field is 1 bit, indicating two transmission states of initial transmission or retransmission.
  • the PSSCH time-frequency resources indicated by the SCI are as follows: in the frequency domain, they are located in subchannels m, m+1, m+L subCH -1, and in time, they are located in time slots
  • the two PSSCH time-frequency resources indicated by the SCI are as follows: the initial transmission resource is located in the subchannel m, m+1, m+L subCH -1 in the frequency domain, and located in the time slot in time The retransmission resource is located in the subchannel in the frequency domain time slot
  • the PSSCH time-frequency resources indicated by the SCI are as follows:
  • the initial transmission resource is located in the subchannel in the frequency domain time slot
  • the retransmission resource is located in the subchannel m, m+1, m+L subCH -1 in the frequency domain, and in the time slot in time
  • SF gap represents the specific value indicated by the "Time gap between initial transmission and retransmission" field, that is, the time domain interval between two PSSCH resources.
  • PSCCH resources of LTE-V2X can be frequency division multiplexed with PSSCH, that is, PSCCH and PSSCH are transmitted on adjacent resource blocks (resource block, RB) or configured in a resource pool separately, that is, PSCCH and PSSCH are transmitted on non-adjacent RBs.
  • PSCCH and PSSCH are transmitted on adjacent resource blocks (resource block, RB)
  • the PSCCH is transmitted on the first two RBs of the frequency domain resources indicated by the SCI.
  • FIG. 2A it shows a schematic diagram of SCI forward indicating retransmission resources when PSCCH and PSSCH are transmitted on adjacent RBs.
  • FIG. 2B it shows a schematic diagram of SCI backward indicating initial transmission resources when PSCCH and PSSCH are transmitted on adjacent RBs.
  • FIG. 2C it shows a schematic diagram of SCI forward indicating retransmission resources when PSCCH and PSSCH are transmitted on non-adjacent RBs.
  • FIG. 2D it shows a schematic diagram of SCI backward indicating initial transmission resources when PSCCH and PSSCH are transmitted on non-adjacent RBs.
  • LTE-V2X does not support a retransmission scheme based on hybrid automatic repeat request (HARQ), and only supports a maximum of 2 blind retransmission schemes.
  • HARQ hybrid automatic repeat request
  • the sending UE transmits up to 2 times. If at least one of the up to 2 transmissions is successful, the TB transmission is considered successful. If the up to 2 transmissions fail, the TB transmission Fail, and no more physical layer retransmissions will be performed.
  • the frequency domain resources of the PSSCH are indicated by the SCI, which is defined as a group of continuous subchannels with a length of L subCH , and is indicated by the "Frequency resource assignment" field in the SCI, which can indicate that the frequency domain resources are in the The starting subchannel index in the sidelink resource pool and length L subCH .
  • N subCH is the total number of sub-channels corresponding to the sidelink resource pool.
  • the frequency domain resource lengths of up to three transmissions of NR-V2X are the same.
  • the time domain positions of the PSSCH resources for up to three transmissions are as follows: The time domain position of one of the PSSCH resources The time domain position of the current SCI is determined, and the time domain position of another PSSCH resource is determined by the "time resource assignment (Time resource assignment)" field in the SCI. if in time slot There is SCI transmission on , and the transmission is located in subchannel m in the frequency domain, then the specific method for determining the time domain position of the PSSCH resource is as follows:
  • the PSSCH time-frequency resources indicated by the SCI are as follows: in the frequency domain, they are located in subchannels m, m+1, m+L subCH -1, and in time, they are located in time slots
  • the SCI indicates an initial transmission resource and a retransmission resource.
  • the two PSSCH time-frequency resources indicated by the SCI are as follows: the initial transmission resources are located in subchannels m, m+1, m+L subCH -1 in the frequency domain, and located in the time slot in time The retransmission resource is located in the subchannel in the frequency domain time slot
  • the PSSCH time-frequency resources indicated by the SCI are as follows: the initial transmission resources are located in subchannels m, m+1, and m+L subCH -1 in the frequency domain, and in time slots in time The first retransmission resource is located in the subchannel in the frequency domain time slot The second retransmission resource is located in the subchannel in the frequency domain time slot
  • NR-V2X supports a two-level SCI structure, where the first level SCI is carried in the PSCCH, including the necessary fields required for the resource exclusion process, and the second level SCI is carried in the PSSCH, including the necessary fields required for the data decoding process.
  • a retransmission scheme based on sidelink (sidelink, SL)-HARQ has been supported.
  • the receiving UE will feed back SL-HARQ information to the sending UE according to the decoding situation.
  • an acknowledgment (acknowledge character, ACK) is fed back
  • a non-acknowledgement (non-acknowledge character, NACK) is fed back.
  • HARQ retransmission enable/disable indicator (HARQ feedback enabled/disabled indicator)" field in the SCI.
  • the time domain distance between R1 and R2 and between R2 and R3 is greater than the minimum processing time required by PSFCH.
  • R1 is the PSSCH for the initial transmission
  • R2 is the PSSCH for the first retransmission
  • R3 is the PSSCH for the second retransmission. That is to say, the transmission time domain interval of the PSSCH needs to be greater than the minimum processing time required by the PSFCH.
  • the sending UE can reserve retransmission resources through the "Frequency resource assignment" field and "Time resource assignment” field in the SCI.
  • the PSFCH resource is determined by the time-frequency resource occupied by the PSSCH and the high layer parameters periodPSFCHresource, MinTimeGapPSFCH, sl-PSFCH-RB-Set-r16, numSubchannel.
  • periodPSFCHresource is the period of PSFCH
  • a PSFCH resource is configured every periodPSFCHresource time slot, and only the penultimate symbol in each PSFCH time slot is used for PSFCH transmission.
  • MinTimeGapPSFCH indicates the minimum interval that needs to be guaranteed between the PSSCH and the PSFCH.
  • sl-PSFCH-RB-Set-r16 indicates the PSFCH RB resource configured for the resource pool, indicated by bitmap, and numSubchannel indicates the number of subchannels included in the resource pool.
  • numSubchannel 2
  • periodPSFCHresource 4
  • LTE-V2X and NR-V2X have two resource allocation modes, one is resource allocation mode for base stations. Among them, LTE-V2X is called mode 3 (mode-3), and NR-V2X is called mode 1 (mode-1). The other is the user-selected resource mode. Among them, LTE-V2X is called mode 4 (mode-4), and NR-V2X is called mode 2 (mode-2).
  • the resource allocation mode of the base station is mainly applied to V2X communication in the case of network coverage.
  • the base station centrally allocates resources according to the BSR report of the UE.
  • the allocation of resources can be dynamic mode or pre-configured mode.
  • the resources allocated by the base station may include initial resources and/or retransmission resources.
  • the transmission resource of the sending UE does not depend on the base station, and the UE selects the transmission resource for communication by itself.
  • This mode is not limited to network coverage, and the sending UE can also use this mode to communicate without network coverage.
  • the user-selected resources include initial resources and/or retransmission resources.
  • the sending UE selects a transmission resource for communication within the resource selection window according to the result of its own resource interception, and at this time, the sending UE can also be called a listening UE. Defined as a collection of time slots belonging to the sidelink resource pool. Assuming that the listening UE triggers resource selection in time slot n, the listening UE continues to listen to all the time slots belonging to the sidelink resource pool in the window, except for the time slots in which the listening UE itself has transmitted, all the remaining time slots .
  • the resources that have been reserved by other UEs are excluded from the resource selection window, and finally the excluded resource set is reported to the media access control layer (media access control, MAC) layer, and the MAC then selects the final transmission resource .
  • media access control layer media access control, MAC
  • the aforementioned LTE V2X devices and NR V2X devices coexist, additional interference may be introduced because one type of device cannot exclude the resources reserved or configured by the other type of device.
  • the feedback resource PSFCH of the NR-V2X device is configured on the resource pool, while the LTE-V2X device only supports blind retransmission and does not need feedback resources. Therefore, when the NR-V2X device and the LTE-V2X device coexist in the same resource pool, the LTE-V2X device cannot recognize the PSFCH resource pre-configured by the NR-V2X device, so it may transmit on the PSFCH resource of the NR-V2X device, causing Interference of PSFCH transmissions of NR-V2X devices.
  • the resource indication method provided in the embodiment of the present application can be applied in systems such as V2X and D2D where UEs communicate directly with UEs.
  • the technical solutions provided by the embodiments of the present application may be applicable to communication scenarios with or without network coverage.
  • FIG. 4 it is a communication system applicable to the resource indication method provided by the embodiment of the present application.
  • the communication system 400 may include a user equipment 401 and a user equipment 402 .
  • the communication system 400 may further include a network device 403 .
  • both the user equipment 401 and the user equipment 402 may be within the coverage of the network device 403 , or one of the user equipment 401 and the user equipment 402 may not be within the coverage of the network device 403 .
  • the user equipment 401 is not within the coverage of the network equipment.
  • neither the user equipment 401 nor the user equipment 402 is within the coverage of the network device 403, which is not specifically limited in this application.
  • the network equipment for example including access network (access network, AN) equipment, such as base station (for example, access point), may refer to the equipment in the access network that communicates with the wireless terminal equipment through one or more cells through the air interface , or for example, a network device in a vehicle-to-everything (V2X) technology is a road side unit (RSU).
  • the base station can be used to encode the information bits and send the encoded information to the end device.
  • the terminal device receives the information sent by the base station, and decodes the information.
  • the terminal equipment can also be used to encode the information bits and send the encoded information to the base station.
  • the base station receives the information sent by the terminal device, and decodes the information.
  • the RSU can be a fixed infrastructure entity supporting V2X applications, and can exchange messages with other entities supporting V2X applications.
  • the network device can also coordinate the attribute management of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE system or long term evolution-advanced (LTE-A), or may also include the fifth generation mobile
  • the next generation node B (next generation node B, gNB) in the communication technology (the 5th generation, 5G) NR system (also referred to as NR system) may also include the cloud access network (cloud radio access network, Cloud RAN) system
  • the centralized unit (centralized unit, CU) and distributed unit (distributed unit, DU) in the present application are not limited.
  • the network device may also include a core network device, and the core network device includes, for example, an access and mobility management function (access and mobility management function, AMF) or a user plane function (user plane function, UPF). Since the embodiments of the present application mainly relate to the access network, unless otherwise specified in the following, the network equipment mentioned refers to the access network equipment.
  • AMF access and mobility management function
  • UPF user plane function
  • User equipment including equipment that provides voice and/or data connectivity to users, specifically, equipment that provides voice to users, or equipment that provides data connectivity to users, or equipment that provides voice and data connectivity to users equipment. Examples may include a handheld device with wireless connectivity, or a processing device connected to a wireless modem.
  • the user equipment can communicate with the core network via a radio access network (radio access network, RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN.
  • radio access network radio access network
  • the user equipment may include user equipment (user equipment, UE), wireless user equipment, mobile user equipment, device-to-device communication (device-to-device, D2D) user equipment, vehicle to everything (vehicle to everything, V2X) user equipment , machine-to-machine/machine-type communications (machine-to-machine/machine-type communications, M2M/MTC) user equipment, Internet of things (Internet of things, IoT) user equipment, subscriber unit, subscriber station 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.
  • IoT Internet of things
  • IoT Internet of things
  • IoT Internet of things
  • subscriber unit subscriber station station
  • mobile station mobile station
  • remote station remote station
  • access point access point
  • AP remote terminal
  • remote terminal remote terminal
  • access terminal access terminal
  • ⁇ may include mobile telephones (or "cellular" telephones), computers with mobile user equipment, portable, pocket, hand-held, computer built-in mobile devices, and the like.
  • PCS personal communication service
  • cordless telephone cordless telephone
  • session initiation protocol session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • constrained devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities, etc.
  • it includes barcodes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning system (global positioning system, GPS), laser scanners and other information sensing devices.
  • the user equipment may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc., which is a general term for the application of 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 worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various user equipments described above are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), they can be considered as vehicle-mounted user equipment, and the vehicle-mounted user equipment is also called an on-board unit (OBU). ).
  • OBU on-board unit
  • the two parties of wireless communication include network equipment and user equipment; considering SL air interface transmission, the transceiver end of wireless communication is both user equipment.
  • the device for implementing the function of the user equipment may be the user equipment, or may be a device capable of supporting the user equipment to implement the function, such as a chip system, and the device may be installed in the user equipment.
  • the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • FIG. 5 it is an exemplary flow chart of a resource indication method provided in an embodiment of the present application, which may include the following operations.
  • S501 A first terminal sends first control information and second control information, and a corresponding second terminal receives the first control information and second control information.
  • the foregoing first control information may be used to indicate the first resource, and the second control information may be used to indicate the feedback resource.
  • the first control information and the second control information may be SCI.
  • the first resource may be a PSSCH resource, and the feedback resource may be a PSFCH resource.
  • the second terminal determines at least one of the first resource and the feedback resource.
  • the first resource may include a feedback resource.
  • the feedback resource may be a part of the first resource.
  • the feedback resource may be used to carry feedback information corresponding to the first data carried by the first resource.
  • the first resource may be used to transmit the first data, and the feedback resource may be used to transmit the feedback information of the first data.
  • the foregoing first terminal and the second terminal may be terminals under the same network standard.
  • the first terminal and the second terminal may be NR-V2X terminals.
  • the first terminal may indicate the feedback resource and the first resource through the first control information and the second control information, and a terminal that is not in the same network standard as the first terminal and the second terminal, such as a terminal supporting LTE V2X, may also be based on the first
  • the control information identifies the first resource indicated by the first terminal, so as to avoid interference with data transmission of the first terminal and the second terminal.
  • the above-mentioned first terminal and second terminal may also be terminals under different network standards.
  • the first terminal may be a terminal of the NR-V2X system
  • the second terminal may be a terminal of the LTE-V2X system.
  • the first terminal may be a terminal of the LTE-V2X system
  • the second terminal may be a terminal of NR-V2X.
  • the first terminal and the second terminal are terminals under different network standards
  • the first resource and/or the feedback resource indicated by the first terminal may also be determined according to the first control information and the second control information, so that the second terminal can Avoiding using the first resource and the feedback resource indicated by the first terminal, thus avoiding interference to data transmission of the first terminal.
  • the first resource and the feedback resource are different.
  • the first control information as the first-level SCI and the second control information as the second-level SCI as an example, different situations will be introduced.
  • the fields included in the first-level SCI are introduced below.
  • the fields contained in the first-level SCI may be the same as the fields contained in the LTE-V2X SCI format 1 (format-1).
  • the first-level SCI can adopt the same SCI format as that of LTE-V2X, so that terminals in the LTE-V2X system can identify the first resource and the feedback resource.
  • the first-level SCI can include:
  • -Priority-3bits can indicate the priority of data carried by the PSSCH through 3 bits (bits).
  • -Resource reservation–4bits is defined as the resource reservation period, and resources can be reserved through the 4bits period.
  • -Frequency resource location of initial transmission and retransmission is defined as the frequency domain resource location of initial transmission and retransmission.
  • -Time gap between initial transmission and retransmission-4bits which is defined as the time domain interval between initial transmission and retransmission, can be indicated by 4bits.
  • -Retransmission index–1bit defined as the retransmission index, can be used to indicate whether there is a retransmission.
  • -Transmission format–1bit is defined as the transmission format.
  • the sum of the number of bits occupied by reserved information and the number of bits occupied by other fields is 32.
  • each field of the above-mentioned first-level SCI can refer to each field in the SCI format-1 of LTE-V2X.
  • the first resource is a transmission resource after the current time unit.
  • the first-level SCI may include the second field.
  • the second field may be "Retransmission index" in the above fields.
  • the first-level SCI may be used to indicate a reserved resource (first resource).
  • the value of "Retransmission index” is 1, the first-level SCI can be used to indicate the reserved resource (first resource).
  • the first resource may be behind the second resource in the time domain.
  • the second resource is located in the same time unit as the first-level SCI in the time domain, the second resource bears the transmission of the PSSCH, and the second-level SCI may be included in the PSSCH. That is to say, the first resource may be behind the time unit where the first-level SCI is located in the time domain.
  • the unit of the time unit may be a symbol, a time slot, a mini-slot, etc., which are not specifically limited in this application.
  • Level 1 SCIs can occupy one or more time units.
  • the second resource may also occupy one or more time units.
  • a first level SCI may include a first field.
  • the first field may be used to indicate the time domain interval between the first resource and the second resource. That is to say, the first field may be used to indicate the time-domain interval between the first resource and the first-level SCI.
  • the first field may be "Time gap between initial transmission and retransmission" in the above fields.
  • the time domain interval between the first resource and the second resource may be determined by the value of the first field. For example, when the value of the first field is 10, it can be considered that the time domain interval between the first resource and the second resource is 10 time units, such as 10 time slots.
  • the resource reserved by the first terminal may be used for its own transmission.
  • the first terminal may transmit the PSSCH on the reserved first resource.
  • the resources reserved by the first terminal may also be used for transmission by the receiving terminal of the first terminal, such as transmission by the second terminal.
  • the second terminal may transmit the PSFCH and/or PSSCH on the first resource reserved by the first terminal.
  • the first terminal may indicate in the second-level SCI whether the reserved resources include feedback resources.
  • the second-level SCI may include the third field, or the reserved field of the first-level SCI may include the third field.
  • the third field may be used to indicate whether PSFCH resources are included. If the third field indicates that PSFCH resources are included, it may indicate that the reserved resources are used by the second terminal.
  • the specific time-frequency domain position of the PSFCH resource may be indicated in the second-level SCI. Alternatively, it may also be indicated by means of pre-configuration, pre-definition, or radio resource control (radio resource control, RRC) signaling configuration.
  • RRC radio resource control
  • the specific time-frequency position of the PSFCH resource may include information about the time-domain resource, frequency-domain resource or code-domain resource occupied by the feedback resource.
  • the time domain resource is a time slot or symbol occupied by the PSFCH resource in the first resource.
  • the frequency domain resource is a subchannel or resource block occupied by the PSFCH resource in the first resource.
  • the starting subchannel index or resource block index of the PSFCH resource in the first resource the number of occupied subchannels or resource blocks, and the like.
  • the first resource includes 10 resource blocks in the frequency domain and one time slot in the time domain, that is, 14 symbols, and the index numbers of time domain resources and frequency domain resources start from 0.
  • the PSFCH resource occupies the first resource block in the frequency domain. Assume that the starting resource block index is 0, and the number of occupied resource blocks is 1. In the time domain, all 14 symbols are occupied, and the starting symbol index is 0. The occupied The number of symbols is 14.
  • the first resource includes 10 resource blocks in the frequency domain and one time slot in the time domain, that is, 14 symbols.
  • PSFCH resources occupy all 10 resource blocks in the frequency domain.
  • the starting resource block The index is 0, the number of occupied resource blocks is 10, the 13th symbol is occupied in the time domain, the starting symbol index is 12, and the number of occupied symbols is 1.
  • the first resource includes 10 resource blocks in the frequency domain and one time slot in the time domain, that is, 14 symbols.
  • PSFCH resources occupy 1 to 5 resource blocks in the frequency domain.
  • the starting resource The block index is 0, the number of occupied resource blocks is 5, the third symbol is occupied in the time domain, the starting symbol index is 2, and the number of occupied symbols is 1.
  • the code domain resource is the sequence cyclic phase offset, specifically including m 0 and m cs .
  • the PSFCH sequence can be generated by a ZC sequence based on low peak-to-average ratio, which occupies one or more consecutive orthogonal OFDM symbols in the time domain, and can be one or more resource blocks in the frequency domain. Specifically, the generation method of the PSFCH sequence is as follows:
  • a basic sequence r(n) can be generated according to the sequence length, 0 ⁇ n ⁇ M ZC , and then the phase rotation of the basic sequence r(n) can be performed to obtain a low peak-to-average ratio sequence that can be reused.
  • the comparison sequence satisfies the following formula:
  • phase rotation value ⁇ l can be used to generate different PSFCH sequences, and each PSFCH sequence can be code-division-multiplexed on one physical resource block PRB for transmission. Since the UE at the receiving end needs to feed back ACK/NACK information, it is necessary to allocate at least two sequences corresponding to different values of ⁇ 1 to each user.
  • the phase rotation value ⁇ l can satisfy the following formula:
  • m 0 represents the initial phase of a PSFCH resource pair.
  • m cs represents the offset of the ACK/NACK sequence in a PSFCH resource pair relative to the initial phase, where a PSFCH resource pair can be used for HARQ-ACK feedback, one sequence can be used for ACK feedback, and the other sequence can be used for NACK feedback .
  • the value of m 0 may be related to the number of sequence pairs on the same PSFCH time-frequency resource, as shown in Table 1. Table 1 is just an example, and the value of m 0 may also be determined by other factors, which is not limited in this application.
  • the value of m cs may be as shown in Table 2 or Table 3.
  • Table 2 and Table 3 are just examples, and the value of m cs can also be determined by other factors, which is not limited in this application.
  • the second terminal may transmit its own PSSCH on the remaining resources except the PSFCH resource within the reserved first resource.
  • the second terminal may send feedback information to the first terminal in the PSFCH, or may also send feedback information to other terminals other than the first terminal.
  • FIG. 6D it shows a schematic diagram of a first resource reserved by a first-level SCI and a second-level SCI.
  • the first terminal may send the first-level SCI and the second-level SCI at time unit t_n.
  • the first terminal may also send data in time unit t_n.
  • the second-level SCI includes the third field, or the reserved field of the first-level SCI may include the third field, then the first terminal also reserves PSFCH resources.
  • the PSSCH resources may include PSFCH resources.
  • LTE-V2X terminals when NR-V2X terminals and LTE-V2X terminals coexist in the same resource pool, by letting NR-V2X terminals adopt the same SCI format as LTE-V2X terminals, LTE-V2X terminals can identify Reserved resources of NR-V2X terminals, and the reserved resources can be used for PSFCH transmission of NR-V2X terminals, avoiding LTE-V2X terminals because they cannot recognize NR-V2X terminal reservations, and for NR-V2X terminals Interference caused by reserved resources.
  • the feedback information transmitted by the second terminal on the PSFCH resource may be feedback information for data transmitted on the second resource.
  • the feedback information may be an acknowledgment (acknowledge character, ACK) or a non-acknowledgment response (non-acknowledge character, NACK) of data located on the same time unit t_n as the first-level SCI and the second-level SCI in FIG. 6D.
  • FIG. 6E it shows a schematic diagram of a first resource reserved by a first-level SCI and a second-level SCI.
  • the first terminal sends the first-level SCI, the second-level SCI and the second data at the time unit t_n, wherein the second-level SCI and the second data are carried in the second resource, and the first-level SCI indicates that the reservation is made at time PSSCH resource of unit t_n+gap.
  • the second-level SCI includes the third field, or the reserved field of the first-level SCI may include the third field. Therefore, PSSCH resources also include PSFCH resources.
  • the first terminal may receive the PSFCH on the PSFCH resource of the time unit t_n+gap, and the PSFCH may include feedback information for the second data.
  • the data corresponding to the feedback information transmitted by the second terminal in the PSFCH may be indicated in the second-level SCI.
  • the first terminal may use at least one of the source index and the destination index in the second-level SCI to indicate the second data corresponding to the PFSCH carried on the reserved PSFCH resource.
  • the source index may be "PSFCH Source ID (PSFCH Source ID)”
  • the destination index may be "PSFCH Purpose ID (PSFCH Destination ID)".
  • PSFCH Source ID and PSFCH Destination ID are exclusively used to indicate the PSSCH corresponding to the PSFCH. It is different from the Source ID field and Destination ID field contained in the second-level SCI in the NR-V2X system.
  • the Source ID field and Destination ID field in NR-V2X are to indicate the source index and destination index of the data carried by the current PSSCH.
  • the second terminal can compare the PSFCH Source ID and PSFCH Destination ID in the second-level SCI with the Source ID and Destination ID corresponding to the previously received PSSCH, and if they are the same, it means the PSFCH reserved by the first terminal Resources are used to transmit the PSFCH of the previously received PSSCH.
  • the data corresponding to the feedback information transmitted by the second terminal in the PSFCH can also be passed through the "PSFCH HARQ process number (PSFCH HARQ process number)" and "PSFCH new data indication (PSFCH) New" in the second-level SCI. data indicator" instruction.
  • PSFCH HARQ process number and "PSFCH New data indicator” are dedicated to indicating the PSSCH corresponding to PSFCH, and the "HARQ process number” and “New data indicator” fields indicated by the second-level SCI in NR-V2X different.
  • the "HARQ process number” and “New data indicator” fields of NR-V2X are used to indicate the HARQ information of the data carried by the current PSSCH.
  • the second terminal may compare the "PSFCH HARQ process number" and "PSFCH New data indicator" in the second-level SCI with the "HARQ process number" and "New data indicator” corresponding to the previously received PSSCH . If they are the same, it means that the PSFCH resource reserved by the first terminal is used to transmit the PSFCH of the previously received PSSCH.
  • the first terminal may determine whether to retransmit the data sent on the PSSCH according to the received HARQ result fed back on the PSFCH.
  • FIG. 6F it shows a schematic diagram of a first resource reserved by a first-level SCI and a second-level SCI.
  • the first terminal sends the first-level SCI and the second-level SCI in time unit t_n.
  • the first-level SCI indicates that the PSSCH resources at the time unit t_n+gap are reserved.
  • the second-level SCI includes the third field, or the reserved field of the first-level SCI may include the third field. Therefore, PSSCH resources also include PSFCH resources.
  • the first terminal may receive the PSFCH on the PSFCH resource of the time unit t_n+gap. Since the second-level SCI includes the source index and the destination index, the third data corresponding to the PSFCH can be determined according to the source index and the destination index.
  • the LTE-V2X terminal when the NR-V2X terminal and the LTE-V2X terminal coexist in the same resource pool, by letting the NR-V2X terminal adopt the same SCI format as the LTE-V2X terminal, the LTE-V2X terminal can identify the NR-V2X terminal Reserve resources, and the reserved resources can be used for PSFCH transmission of NR-V2X terminals, avoiding the interference caused by LTE-V2X terminals to the reserved resources of NR-V2X terminals because they cannot recognize the reservations of NR-V2X terminals.
  • the first-level SCI further includes a fourth field, where the fourth field is used to indicate the frequency domain resource occupied by the first resource.
  • the fourth field may be "Frequency resource location of initial transmission and retransmission”. Therefore, the PSSCH resource and PSFCH resource can be forward reserved through the "Time gap between initial transmission and retransmission", "Frequency resource location of initial transmission and retransmission” and "Retransmission index” fields.
  • Case 2 the first resource is a transmission resource before the current time unit.
  • the first-level SCI may include the second field.
  • the value of the second field when the value of the second field is the second value, it may indicate that the first resource is a certain transmission resource before the current time unit, and the current time unit may be the time unit for sending the first-level SCI.
  • the first resource may be a transmission resource of the second terminal, such as a PSSCH of the second terminal.
  • the second field may be "Retransmission index" in the above fields.
  • the first-level SCI may be used to indicate the transmission resource (first resource) before the current time unit.
  • the value of "Retransmission index" when the value of "Retransmission index" is 1, the first-level SCI may be used to indicate the transmission resource (first resource) before the current time unit.
  • the first resource may be ahead of the second resource in the time domain.
  • the second resource may be located in the same time unit as the first-level SCI in the time domain, the second resource bears the transmission of the PSSCH, and the second-level SCI may be included in the PSSCH. That is to say, the first resource may be before the time unit where the first-level SCI is located in the time domain.
  • a first level SCI may include a first field.
  • the first field may be used to indicate the time domain interval between the first resource and the second resource. That is to say, the first field may be used to indicate the time-domain interval between the first resource and the first-level SCI.
  • the first field may be "Time gap between initial transmission and retransmission" in the above fields.
  • the time domain interval between the first resource and the second resource may be determined by the value of the first field. For example, when the value of the first field is 10, it can be considered that the time domain interval between the first resource and the second resource is 10 time units, such as 10 time slots.
  • the second resource may be autonomously selected by monitoring to transmit the PSSCH and/or PSFCH.
  • the method for autonomously selecting resources in a monitoring manner may refer to the foregoing related descriptions, and details are not repeated here.
  • the second-level SCI may include an identification field, such as the third field, or the reserved field of the first-level SCI may include the third field, indicating that the resources independently selected by the first terminal include PSFCH resources.
  • the feedback information transmitted by the first terminal on the PSFCH resource may be feedback information for data in the PSSCH received on the first resource.
  • the second terminal may identify the PSSCH corresponding to the PSFCH from the first terminal through the first-level SCI and the second-level SCI sent by the first terminal.
  • the identification manner may have the following two types.
  • the first method bind the PSFCH resource with the first resource indicated by the first-level SCI, that is, as long as the third field indicates that the second resource contains the PSFCH resource, and the first-level SCI indicates the first resource before the current time unit If there is one resource, the feedback information transmitted on the PSFCH corresponds to the PSSCH in the first resource in the history indicated by the first-level SCI.
  • the second method a display indication method.
  • a field may be used to indicate that the feedback information to be transmitted by the PSFCH corresponds to the PSSCH in the historical first resource indicated by the first-level SCI.
  • the field may be a newly added field, or an existing field may be reused.
  • FIG. 7 it shows a schematic diagram of a first-level SCI and a second-level SCI indicating a first resource.
  • the first terminal may send the first-level SCI and the second-level SCI in time unit t_n.
  • the second-level SCI indicates that the second resource also includes PSFCH resources, that is to say, the first terminal sends feedback information on the PSFCH.
  • Retransmission index 1
  • the "Resource reservation" field in the first-level SCI is not zero, it means that the first terminal periodically reserves the second resource selected independently.
  • the second resource independently selected by the first terminal may be used to transmit its own PSFCH and/or PSSCH to the second terminal.
  • the specific time-frequency domain position of the PSFCH can be indicated in the second-level SCI, or can also be indicated through pre-configuration, pre-definition, or RRC signaling configuration. For details, please refer to the relevant description in case 1. The difference is that the resource of PSFCH is included in the second resource, which will not be repeated here.
  • the first-level SCI further includes a fourth field, where the fourth field is used to indicate the frequency domain resource occupied by the first resource.
  • the fourth field may be "Frequency resource location of initial transmission and retransmission”. Therefore, the PSSCH corresponding to the PSFCH can be indicated forward through the "Time gap between initial transmission and retransmission", "Frequency resource location of initial transmission and retransmission” and "Retransmission index” fields.
  • NR-V2X terminals can independently select PSFCH and/or PSSCH resources, and in order to reduce the complexity of blind detection, let NR-V2X terminals use
  • the same SCI format as LTE-V2X terminals enables NR-V2X terminals and LTE-V2X terminals to identify the reserved PSFCH resources and corresponding PSSCH resources of NR-V2X terminals, avoiding the problem that LTE-V2X terminals cannot recognize NR-V2X Reserved PSFCH resources, but the interference caused to the reserved PSFCH resources of NR-V2X terminals.
  • Case 3 the first resource is a transmission resource in the current time unit.
  • the first resource may be located in the same time unit as the first-level SCI in the time domain.
  • Time gap between initial transmission and retransmission in the first-level SCI can be equal to 0, or it can be a reserved value.
  • the second-level SCI may include an identification field, such as the third field, or the reserved field of the first-level SCI may include the third field, indicating that the first resource independently selected by the first terminal includes PSFCH resources.
  • the feedback information transmitted by the first terminal on the PSFCH resource may be feedback information for the fourth data.
  • the fourth data may be indicated by a source index and/or a destination index in the second-level SCI.
  • a source index and/or a destination index in the second-level SCI For example, it can be indicated through the "PSFCH Source ID" and "PSFCH Destination ID” fields in the second-level SCI.
  • PSFCH Source ID and "PSFCH Destination ID” fields in the second-level SCI.
  • the fourth data can be passed or indicated by the "PSFCH HARQ process number" and "PSFCH New data indicator" in the second-level SCI.
  • PSFCH HARQ process number and "PSFCH New data indicator” in the second-level SCI.
  • the receiving terminal of the first terminal may determine whether to retransmit the fourth data according to the HARQ result fed back on the PSFCH.
  • the "Resource reservation" field in the first-level SCI when the "Resource reservation" field in the first-level SCI is not zero, it means that the first terminal periodically reserves the first resource selected independently.
  • the first resource independently selected by the first terminal may be used to transmit its own PSFCH and/or PSSCH to the second terminal.
  • the specific time-frequency domain position of the PSFCH may be indicated in the second-level SCI, for details, please refer to the relevant description in Case 1, which will not be repeated here.
  • FIG. 8 it shows a schematic diagram of the first level SCI and the second level SCI indicating the first resource and the fourth data.
  • the first terminal may send the first-level SCI and the second-level SCI in time unit t_n.
  • the second-level SCI indicates that the first resource also includes PSFCH resources, that is to say, the first terminal sends feedback information on the PSFCH.
  • the fourth data corresponding to the PSFCH in the first-level SCI may be indicated by the source index and the destination index in the second-level SCI. That is to say, the source index and the destination index contained in the second-level SCI may indicate the fourth data, and the feedback information sent by the first terminal is aimed at the fourth data.
  • the receiving UE through NR-V2X can independently select PSFCH and/or PSSCH resources, and in order to reduce the complexity of blind detection, let NR-V2X Adopt the same SCI format as LTE-V2X, so that NR-V2X and LTE-V2X users can identify NR-V2X reservation resources and corresponding PSSCH resources, avoiding LTE-V2X because it cannot recognize NR-V2X reservations, and NR - Interference caused by reserved resources of V2X.
  • the first terminal and the second terminal include hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.
  • FIG. 9 and FIG. 10 are schematic structural diagrams of possible communication devices provided by the embodiments of the present application. These communication devices can be used to implement the functions of the first terminal or the second terminal in the above method embodiments, and therefore can also realize the beneficial effects of the above method embodiments.
  • the communication device may be one of user equipment 401 and user equipment 402 as shown in FIG. 4 , and may also be a module (such as a chip) applied to a terminal.
  • a communication device 900 includes a processing unit 910 and a transceiver unit 920 .
  • the communication device 900 is configured to realize the functions of the first terminal or the second terminal in the method embodiment shown in FIG. 5 or FIG. 7 above.
  • the processing unit 910 is configured to generate first control information and second control information.
  • the first control information is used to indicate the first resource; the second control information is used to indicate the feedback resource; the first resource includes the feedback resource, or the feedback resource is used to carry the feedback information corresponding to the first data carried by the first resource.
  • the transceiver unit 920 is configured to send the first control information and the second control information.
  • the transceiver unit 920 is configured to receive the first control information and the second control information.
  • the first control information is used to indicate the first resource; the second control information is used to indicate the feedback resource; the first resource includes the feedback resource, or the feedback resource is used to carry the feedback information corresponding to the first data carried by the first resource.
  • the processing unit 910 is configured to determine at least one of the first resource and the feedback resource.
  • processing unit 910 and the transceiver unit 920 can be directly obtained by referring to related descriptions in the method embodiments shown in FIG. 5 to FIG. 7 , and details are not repeated here.
  • a communication device 1000 includes a processor 1010 and an interface circuit 1020 .
  • the processor 1010 and the interface circuit 1020 are coupled to each other.
  • the interface circuit 1020 may be a transceiver or an input-output interface.
  • the communication device 1000 may further include a memory 1030 for storing instructions executed by the processor 1010 or storing input data required by the processor 1010 to execute the instructions or storing data generated by the processor 1010 after executing the instructions.
  • the processor 1010 is used to implement the functions of the above-mentioned processing unit 910
  • the interface circuit 1020 is used to implement the functions of the above-mentioned transceiver unit 920 .
  • the terminal chip implements the function of the first terminal in the above method embodiment.
  • the terminal chip receives information from other modules in the terminal (such as radio frequency modules or antennas), and the information is sent to the first terminal by the second terminal or base station; or, the terminal chip sends information to other modules in the first terminal (such as radio frequency modules) module or antenna) to send information, the information is sent by the first terminal to the second terminal or the base station.
  • the base station module implements the function of the second terminal in the above method embodiment.
  • the terminal chip receives information from other modules in the terminal (such as radio frequency modules or antennas), and the information is sent to the second terminal by the first terminal or base station; or, the terminal chip sends information to other modules in the second terminal (such as radio frequency modules) module or antenna) to send information, the information is sent by the second terminal to the first terminal or the base station.
  • the processor in the embodiments of the present application can be a central processing unit (Central Processing Unit, CPU), and can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application-specific integrated circuits (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC can be located in the base station or the terminal.
  • the processor and the storage medium may also exist in the base station or the terminal as discrete components.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable devices.
  • the computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; and it may also be a semiconductor medium, such as a solid state disk.
  • the computer readable storage medium may be a volatile or a nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.
  • “at least one” means one or more, and “multiple” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A exists alone, 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 contextual objects are an “or” relationship; in the formulas of this application, the character “/” indicates that the contextual objects are a “division” Relationship.
  • “Including at least one of A, B and C” may mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

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Abstract

一种资源指示方法和装置，其中，方法包括：第一终端发送第一控制信息和第二控制信息；其中，第一控制信息用于指示第一资源；第二控制信息用于指示反馈资源；第一资源包括反馈资源，或者反馈资源用于承载第一资源承载的第一数据所对应的反馈信息。

Description

一种资源指示方法和装置
相关申请的交叉引用
本申请要求在2021年06月21日提交中国国家知识产权局、申请号为202110686691.5、申请名称为“一种资源指示方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种资源指示方法和装置。
背景技术
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也逐渐增加，因此设备到设备(device-to-device，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(user equipment，UE)的电池功耗、提高数据传输效率，并能很好的满足服务的需求。D2D技术允许多个支持D2D功能的UE在有网络基础设备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，但是因考虑到安全性，这种场景下对时延的要求非常高。
因此第三代合作伙伴计划(the 3 rd generation partnership project，3GPP)提出基于长期演进(long term evolution，LTE)网络的车联网技术(vehicle to everything，V2X)，V2X通信是指车辆与外界的任何事物的通信，包括车与车的通信(vehicle to vehicle，V2V)、车与行人的通信(vehicle to pedestrian，V2P)、车与基础设施的通信(vehicle to infrastructure，V2T)、车与网络的通信(vehicle to network，V2N)等。
其中，LTE-V2X作为较早的V2X协议，已经实现部分商用，而新无线(new radio，NR)V2X作为较晚发展的协议，还在进一步演进中。当基于LTE-V2X协议的设备和基于NRV2X协议的两类设备共存时，可能因为一类设备无法排除另一类设备预约或配置的资源，而对数据传输造成干扰。
发明内容
本申请提供一种资源指示方法和装置，以期提高V2X终端的数据传输性能。
第一方面，提供了一种资源指示方法。该方法可以由第一终端执行，或者类似第一终端的功能的芯片执行。该方法中，第一终端可以发送第一控制信息和第二控制信息。其中，第一控制信息可以用于指示第一资源；第二控制信息可以用于指示反馈资源。第一资源可以包括反馈资源，或者反馈资源可以用于承载第一资源承载的第一数据所对应的反馈信息。
基于上述方案，第一终端可以通过第一控制信息和第二控制信息向指示第一资源和反馈资源。当NR-V2X和LTE-V2X共存在同一资源池内时,LTE-V2X设备也可以识别NR-V2X设备的PSFCH资源，并避免对NR-V2X设备的PSFCH传输的干扰。
在一种可能的实现方式中，第一控制信息可以包括第一字段。第一字段可以用于指示 第一资源与第二资源之间的时域间隔，第二资源在时域上可以与第一控制信息位于相同的时间单元。
基于上述方案，第一终端可以通过第一字段指示第一资源与第一控制信息所在的时间单元之间的时域间隔，以实现指示第一资源。
在一种可能的实现方式中，第一控制信息可以包括第二字段；第二字段取值为第一数值时，第一资源可以为第一终端预约的资源。第一资源在时域上可以位于第二资源之后，第二资源在时域上可以与第一控制信息位于相同的时间单元。
基于上述方案，在第二字段的取值为第一数值时，第一资源可以是预约的资源，也就是第一资源可以位于第一控制信息所在的时间单元之后。通过上述方案，可以指示第一终端预约的资源，以避免其他的终端对第一终端的数据传输造成干扰。
在一种可能的实现方式中，第二控制信息可以包括第三字段；第三字段用于指示第一资源包括反馈资源。
基于上述方案，第一终端可以通过第三字段指示第一资源是否包括反馈资源，以预约反馈资源。
在一种可能的实现方式中，第一终端可以在反馈资源上接收第二数据对应的反馈信息，第二数据为第一终端在第二资源上发送的数据。
基于上述方案，第一终端预约的反馈资源的使用对象可以是其他终端，如第三终端。通过上述方案，第一终端可以指示预约的反馈资源，以避免除第三终端以外的终端在反馈资源上传输数据，造成对第一终端的数据传输的干扰。
在一种可能的实现方式中，第二控制信息可以包括第一索引和/或第二索引。其中，第一索引可以用于标识第三数据的源索引，第二索引可以用于标识第三数据的目的索引。
基于上述方案，第二控制信息中可以包含用于标识第三数据的源索引和目的索引中的至少一个，以让使用第一终端预约的反馈资源的终端，在反馈资源上传输上述第三数据的反馈信息。
在一种可能的实现方式中，第一终端可以在反馈资源上接收第三数据对应的反馈信息。
在一种可能的实现方式中，第一控制信息可以包括第二字段；第二字段取值为第二数值时，第一资源可以为第二终端的发送资源；第一资源在时域上可以位于第二资源之前，第二资源在时域上可以与第一控制信息位于相同的时间单元。
基于上述方案，在第二字段取值为第二数值时，第一资源可以是历史的资源，也就是第一终端的接收资源。第一终端可以通过第一控制信息指示第一控制信息所在的时间单元上传输的资源与第一资源相对应。
在一种可能的实现方式中，第二控制信息可以包括第三字段；第三字段可以用于指示第二资源包括反馈资源。
基于上述方案，在第三字段指示第二资源包括反馈资源时，第一终端可以指示该反馈资源是针对上述第一资源上接收到的数据的反馈资源。
在一种可能的实现方式中，第一终端可以在反馈资源上发送第一数据对应的反馈信息。
在一种可能的实现方式中，第二控制信息可以包括第三字段；第三字段可以用于指示第一资源包括反馈资源，第一资源在时域上可以与第一控制信息位于相同的时间单元。
基于上述方案，第一终端可以通过第三字段指示在第一控制信息所占用的时间单元上，还包括反馈资源，也就是第一终端还发送了反馈信息。
在一种可能的实现方式中，第二控制信息可以包括第一索引和/或第二索引；第一索引可以用于标识第四数据的源索引，第二索引可以用于标识第四数据的目的索引。
基于上述方案，第一终端可以通过第二控制信息包含的源索引和目的索引中的至少一个，指示第一资源包括的反馈资源上传输了上述源索引和目的索引所标识的第四数据的反馈信息。
在一种可能的实现方式中，第一终端可以在反馈资源上发送第四数据对应的反馈信息。
在一种可能的实现方式中，第一控制信息还可以包括第一字段；第一字段取值为零。
在一种可能的实现方式中，第一控制信息还可以包括第四字段；第四字段可以用于指示第一资源所占用的频域资源。
第二方面，提供了一种资源指示方法。该方法可以由第二终端执行，或者类似第二终端功能的芯片执行。该方法中，第二终端接收第一控制信息和第二控制信息；其中，第一控制信息用于指示第一资源；第二控制信息用于指示反馈资源；第一资源包括反馈资源，或者反馈资源用于承载第一资源承载的第一数据所对应的反馈信息。
在一种可能的实现方式中，第一控制信息包括第一字段；第一字段用于指示第一资源与第二资源之间的时域间隔，第二资源在时域上与第一控制信息位于相同的时间单元。
在一种可能的实现方式中，第一控制信息包括第二字段；第二字段取值为第一数值时，第一资源为第一终端预约的资源；第一资源在时域上位于第二资源之后，第二资源在时域上与第一控制信息位于相同的时间单元。
在一种可能的实现方式中，第二控制信息包括第三字段；第三字段用于指示第一资源包括反馈资源。
在一种可能的实现方式中，第二终端在反馈资源上发送第二数据对应的反馈信息，第二数据为第一终端在第二资源上发送的数据。
在一种可能的实现方式中，第二控制信息包括第一索引和/或第二索引；第一索引用于标识第三数据的源索引，第二索引用于标识第三数据的目的索引。
在一种可能的实现方式中，第二终端在反馈资源上发送第三数据对应的反馈信息。
在一种可能的实现方式中，第一控制信息包括第二字段；第二字段取值为第二数值时，第一资源为第二终端的发送资源；第一资源在时域上位于第二资源之前，第二资源在时域上与第一控制信息位于相同的时间单元。
在一种可能的实现方式中，第二控制信息包括第三字段；第三字段用于指示第二资源包括反馈资源。
在一种可能的实现方式中，第二终端在反馈资源上接收第一数据对应的反馈信息。
在一种可能的实现方式中，第二控制信息包括第三字段；第三字段用于指示第一资源包括反馈资源，第一资源在时域上与第一控制信息位于相同的时间单元。
在一种可能的实现方式中，第二控制信息包括第一索引和/或第二索引；第一索引用于标识第四数据的源索引，第二索引用于标识第四数据的目的索引。
在一种可能的实现方式中，第二终端在反馈资源上接收第四数据对应的反馈信息。
在一种可能的实现方式中，第一控制信息还包括第一字段；第一字段取值为零。
在一种可能的实现方式中，第一控制信息还包括第四字段；第四字段用于指示第一资源所占用的频域资源。
第三方面，提供一种通信装置。通信装置可用于执行上述第一方面或第一方面的任一可能的实现方式中的方法。具体地，通信装置可以包括用于执行第一方面或第一方面的任一可能的实现方式中的方法的模块或单元，例如包括处理单元和收发单元。其中，处理单元，用于生成第一控制信息和第二控制信息。第一控制信息用于指示第一资源；第二控制信息用于指示反馈资源；第一资源包括反馈资源，或者反馈资源用于承载第一资源承载的第一数据所对应的反馈信息。收发单元，用于发送第一控制信息和第二控制信息。
在一种设计中，第一控制信息包括第一字段；第一字段用于指示第一资源与第二资源之间的时域间隔，第二资源在时域上与第一控制信息位于相同的时间单元。
在一种设计中，第一控制信息包括第二字段；第二字段取值为第一数值时，第一资源为第一终端预约的资源；第一资源在时域上位于第二资源之后，第二资源在时域上与第一控制信息位于相同的时间单元。
在一种设计中，第二控制信息包括第三字段；第三字段用于指示第一资源包括反馈资源。
在一种设计中，收发单元，还用于在反馈资源上接收第二数据对应的反馈信息，第二数据为第一终端在第二资源上发送的数据。
在一种设计中，第二控制信息包括第一索引和/或第二索引；第一索引用于标识第三数据的源索引，第二索引用于标识第三数据的目的索引。
在一种设计中，收发单元，还用于在反馈资源上接收第三数据对应的反馈信息。
在一种设计中，第一控制信息包括第二字段；第二字段取值为第二数值时，第一资源为第二终端的发送资源；第一资源在时域上位于第二资源之前，第二资源在时域上与第一控制信息位于相同的时间单元。
在一种设计中，第二控制信息包括第三字段；第三字段用于指示第二资源包括反馈资源。
在一种设计中，收发单元，还用于在反馈资源上发送第一数据对应的反馈信息。
在一种设计中，第二控制信息包括第一索引和/或第二索引；第一索引用于标识第四数据的源索引，第二索引用于标识第四数据的目的索引。
在一种设计中，收发单元，还用于在反馈资源上发送第四数据对应的反馈信息。
在一种设计中，第一控制信息还包括第一字段；第一字段取值为零。
在一种设计中，第一控制信息还包括第四字段；第四字段用于指示第一资源所占用的频域资源。
第四方面，提供一种通信装置。通信装置可用于执行上述第二方面或第二方面的任一可能的实现方式中的方法。具体地，通信装置可以包括用于执行第二方面或第二方面的任一可能的实现方式中的方法的模块或单元，例如包括处理单元和收发单元。其中，收发单元，用于接收第一控制信息和第二控制信息。第一控制信息用于指示第一资源；第二控制信息用于指示反馈资源；第一资源包括反馈资源，或者反馈资源用于承载第一资源承载的第一数据所对应的反馈信息。处理单元，用于确定第一资源和反馈资源中的至少一个。
在一种设计中，第一控制信息包括第一字段；第一字段用于指示第一资源与第二资源之间的时域间隔，第二资源在时域上与第一控制信息位于相同的时间单元。
在一种设计中，第一控制信息包括第二字段；第二字段取值为第一数值时，第一资源为第一终端预约的资源；第一资源在时域上位于第二资源之后，第二资源在时域上与第一 控制信息位于相同的时间单元。
在一种设计中，第二控制信息包括第三字段；第三字段用于指示第一资源包括反馈资源。
在一种设计中，收发单元，还用于在反馈资源上发送第二数据对应的反馈信息，第二数据为第一终端在第二资源上发送的数据。
在一种设计中，第二控制信息包括第一索引和/或第二索引；第一索引用于标识第三数据的源索引，第二索引用于标识第三数据的目的索引。
在一种设计中，收发单元，还用于在反馈资源上发送第三数据对应的反馈信息。
在一种设计中，第一控制信息包括第二字段；第二字段取值为第二数值时，第一资源为第二终端的发送资源；第一资源在时域上位于第二资源之前，第二资源在时域上与第一控制信息位于相同的时间单元。
在一种设计中，第二控制信息包括第三字段；第三字段用于指示第二资源包括反馈资源。
在一种设计中，收发单元，还用于在反馈资源上接收第一数据对应的反馈信息。
在一种设计中，第二控制信息包括第一索引和/或第二索引；第一索引用于标识第四数据的源索引，第二索引用于标识第四数据的目的索引。
在一种设计中，收发单元，还用于在反馈资源上接收第四数据对应的反馈信息。
在一种设计中，第一控制信息还包括第一字段；第一字段取值为零。
在一种设计中，第一控制信息还包括第四字段；第四字段用于指示第一资源所占用的频域资源。
第五方面，本申请实施例提供一种通信装置，该通信装置可以为上述实施例中第三方面至第四方面中任一方面的通信装置，或者为设置在第三方面至第四方面中任一方面的通信装置中的芯片。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令或者数据，处理器与存储器、通信接口耦合，当处理器读取所述计算机程序或指令或数据时，使通信装置执行上述第一方面至第二方面中任一方面方法实施例中由第一终端或第二终端所执行的方法。
应理解，该通信接口可以通过所述通信装置中的天线、馈线和编解码器等实现，或者，如果通信装置为设置在第一终端或第二终端中的芯片，则通信接口可以是该芯片的输入/输出接口，例如输入/输出管脚等。所述通信装置还可以包括收发器，用于该通信装置与其它设备进行通信。示例性地，当该通信装置为第一终端时，该其它设备为第二终端；或者，当该通信装置为第二终端时，该其它设备为第一终端。
第六方面，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现第三方面至第四方面中任一方面中的通信装置执行的方法。在一种可能的实现方式中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第七方面，本申请实施例提供了一种通信系统，所述通信系统包括第三方面和所述第四方面所述的通信装置。
第八方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述各方面中由第一终端执行的方法；或实现上述各方面中由第二终端执行的方法。
第九方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被运行时，使得上述各方面中由第一终端执行的方法被执行，或使得上述各方面中由第二终端执行的方法被执行。
上述第二方面至第八方面及其实现方式的有益效果可以参考对第一方面的方法及其实现方式的有益效果的描述。
附图说明
图1为V2X通信的多种通信方式示意图；
图2A为PSCCH和PSSCH在临近的资源块上传输时，SCI前向指示重传资源的示意图；
图2B为PSCCH和PSSCH在临近的资源块上传输时，SCI后向指示初传资源的示意图；
图2C为PSCCH和PSSCH在非临近的资源块上传输时，SCI前向指示重传资源的示意图；
图2D为PSCCH和PSSCH在非临近的资源块上传输时，SCI后向指示初传资源的示意图；
图3A为SL-HARQ的重传示意图；
图3B为资源池配置的PSFCH RB资源的示意图；
图3C为一个子信道对应的PSFCH资源所占用的RB数目示意图；
图4为本申请实施例提供的通信系统示意图；
图5为本申请实施例提供的资源指示方法的示例性流程图；
图6A为本申请实施例提供的PSFCH的具体时频位置示意图之一；
图6B为本申请实施例提供的PSFCH的具体时频位置示意图之一；
图6C为本申请实施例提供的PSFCH的具体时频位置示意图之一；
图6D为本申请实施例提供的第一级SCI前向指示第一资源的示意图之一；
图6E为本申请实施例提供的第一级SCI前向指示第一资源的示意图之一；
图6F为本申请实施例提供的第一级SCI前向指示第一资源的示意图之一；
图7为本申请实施例提供的第一级SCI后向指示第一资源的示意图之一；
图8为本申请实施例提供的第一级SCI后向指示第一资源的示意图之一；
图9为本申请实施例提供的通信装置的结构示意图之一；
图10为本申请实施例提供的通信装置的结构示意图之一。
具体实施方式
参阅图1，V2X通信可以包括V2V、V2P、V2I和V2N等通信方式。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，如可以大量应用在智能汽车、自动驾驶和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接入设备调度模式，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。车辆用户(vehicle UE，V-UE)能将自身的一些信息，例如周期性事件(包括位置、速 度和意图等信息)以及一些非周期性的事件触发的信息向周围的V-UE发送，同样地V-UE也会实时接收周围用户的信息。其中，意图可以包括转弯、并线和倒车等。
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。随着第五代移动通信技术(5 th generation mobile communication technology，5G)技术在3GPP标准组织中的开发，5G NR V2X也将进一步发展，比如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，以满足更加广泛的应用场景需求。
以下，分别对LTE V2X和NR V2X进行介绍。
1、LTE V2X。
在LTE-V2X中，侧行链路控制信息(sidelink control information，SCI)承载在物理层侧行链路控制信道(physical sidelink control channel，PSCCH)中。物理层侧行链路共享信达(physical sidelink shared channel，PSSCH)的时频资源由SCI指示，频率资源定义为一组长度为L subCH的连续子信道，由SCI中的“初始传输和重复传输的频域资源位置(Frequency resource location of the initial transmission and retransmission)”字段指示，该字段可以指示频域资源在侧行链路(sidelink)资源池中的起始子信道索引
Figure PCTCN2022097894-appb-000001
和长度L subCH。其中1≤L subCH≤N subCH,
Figure PCTCN2022097894-appb-000002
N subCH为sidelink资源池对应的子信道总数。并且LTE-V2X最多两次传输的频域资源相同。
最多两次传输的PSSCH资源的时域位置如下所示:其中一个PSSCH资源的时域位置
Figure PCTCN2022097894-appb-000003
由当前SCI的时域位置确定，另外一个PSSCH资源的时域位置由SCI中的“初始传输和重复传输之间的时域间隔(Time gap between initial transmission and retransmission)”字段和“重传索引(Retransmission index)”字段确定。LTE-V2X允许在初传时前向指示重传资源，或者在重传时后向指示初传资源。
具体的，首先通过“Time gap between initial transmission and retransmission”字段确定两个PSSCH资源的时域间隔，再通过“Retransmission index”字段确定当前的传输为初传或重传，最终确定另外一个PSSCH资源的具体时域位置在当前SCI的之前或之后。其中“Time gap between initial transmission and retransmission”字段为4个比特，共指示16个可能的间隔，“Retransmission index”字段为1个比特，指示两种初传或重传两种传输状态。如果在时隙
Figure PCTCN2022097894-appb-000004
上存在SCI的传输，则具体的PSSCH资源时域位置的确定方式如下所示：
1)、如果SCI中的“Time gap between initial transmission and retransmission”字段为0，表示没有重传资源或者初传资源。该SCI指示的PSSCH时频资源如下所示：频域上位于子信道m，m+1，m+L subCH-1，时间上位于时隙
Figure PCTCN2022097894-appb-000005
2)、如果“Retransmission index”字段为0，表示当前传输为初传。该SCI指示的两个PSSCH时频资源如下所示：初传资源在频域上位于子信道m，m+1，m+L subCH-1，时间上位于时隙
Figure PCTCN2022097894-appb-000006
重传资源在频域上位于子信道
Figure PCTCN2022097894-appb-000007
间上位于时隙
Figure PCTCN2022097894-appb-000008
3)、如果“Retransmission index”字段为1，表示当前传输为重传。该SCI指示的PSSCH时频资源如下所示：
初传资源在频域上位于子信道
Figure PCTCN2022097894-appb-000009
时间上位于时隙
Figure PCTCN2022097894-appb-000010
重传资源在频域上位于子信道m，m+1，m+L subCH-1，时间上位于时隙
Figure PCTCN2022097894-appb-000011
这里SF gap表示“Time gap between initial transmission and retransmission”字段指示的具体数值，即两个PSSCH资源的时域间隔。
LTE-V2X的PSCCH资源可以跟PSSCH频分复用，即PSCCH和PSSCH在临近的资源块(resource block，RB)上传输或者单独配置资源池中，即PSCCH和PSSCH在非临近RB上传输。当PSCCH和PSSCH在临近的资源块(resource block，RB)上传输时，PSCCH在SCI指示的频域资源的前两个RB上传输。
参阅图2A所示，示出了PSCCH和PSSCH在临近的RB上传输时，SCI前向指示重传资源的示意图。
参阅图2B所示，示出了PSCCH和PSSCH在临近的RB上传输时，SCI后向指示初传资源的示意图。
参阅图2C所示，示出了PSCCH和PSSCH在非临近的RB上传输时，SCI前向指示重传资源的示意图。
参阅图2D所示，示出了PSCCH和PSSCH在非临近的RB上传输时，SCI后向指示初传资源的示意图。
LTE-V2X不支持基于混合式自动重传请求(hybrid automatic repeat request，HARQ)的重传方案，只支持最多2次的盲重传方案。针对同一个传输块(transport block，TB)，发送UE最多传输2次，如果最多2次传输中至少有一次传输成功，则认为该TB传输成功，如果最多2次传输都失败，则该TB传输失败，并且不再进行物理层重传。
2、NR V2X。
在NR-V2X中只支持前向指示重传资源，不支持后向指示初传资源，并且最多可以指示包括当前传输的2个或3个传输资源。PSSCH的频域资源由SCI指示，频率资源定义为一组长度为L subCH的连续子信道，由SCI中的“频域资源分配(Frequency resource assignment)”字段指示，该字段可以指示频域资源在sidelink资源池中的起始子信道索引
Figure PCTCN2022097894-appb-000012
和长度L subCH。其中1≤L subCH≤N subCH,
Figure PCTCN2022097894-appb-000013
Figure PCTCN2022097894-appb-000014
N subCH为sidelink资源池对应的子信道总数。并且NR-V2X最多三次传输的频域资源的长度相同。
最多三次传输的PSSCH资源的时域位置如下所示:其中一个PSSCH资源的时域位置
Figure PCTCN2022097894-appb-000015
由当前SCI的时域位置确定，另外的PSSCH资源的时域位置由SCI中的“时域资源分配(Time resource assignment)”字段确定。如果在时隙
Figure PCTCN2022097894-appb-000016
上存在SCI的传输，并且该传输在频域上位于子信道m，则具体的PSSCH资源时域位置的确定方式如下所示：
1)、如果SCI中的“Time resource assignment”字段为0，表示没有重传资源。该SCI指示的PSSCH时频资源如下所示：频域上位于子信道m,m+1,m+L subCH-1,时间上位于时隙
Figure PCTCN2022097894-appb-000017
2)、如果“Time resource assignment”字段的值大于等于1并且小于等于31,表示该SCI指示初传资源和一个重传资源。该SCI指示的两个PSSCH时频资源如下所示：初传资源在频域上位于子信道m,m+1,m+L subCH-1,时间上位于时隙
Figure PCTCN2022097894-appb-000018
重传资源在频域上位于子信道
Figure PCTCN2022097894-appb-000019
时间上位于时隙
Figure PCTCN2022097894-appb-000020
3)、如果“Time resource assignment”字段的值大于31，表示该SCI指示初传资源和两个重传资源。该SCI指示的PSSCH时频资源如下所示：初传资源在频域上位于子信道m，m+1，m+L subCH-1，时间上位于时隙
Figure PCTCN2022097894-appb-000021
第一个重传资源在频域上位于子信道
Figure PCTCN2022097894-appb-000022
Figure PCTCN2022097894-appb-000023
时间上位于时隙
Figure PCTCN2022097894-appb-000024
第二个重传资源在频域上位于子信道
Figure PCTCN2022097894-appb-000025
时间上位于时隙
Figure PCTCN2022097894-appb-000026
NR-V2X支持两级SCI结构，其中第一级SCI承载在PSCCH中，包括资源排除流程所需要的必要字段，第二级SCI承载在PSSCH中，包括数据译码流程所需要的必要字段。
在NR-V2X中，基于侧行链路(sidelink，SL)-HARQ的重传方案已经被支持。接收UE会根据译码的情况向发送UE反馈SL-HARQ信息。当接收端正确译码PSSCH时，反馈确认应答(acknowledge character，ACK)，当接收端不能正确译码PSSCH时，反馈非确认应答(non-acknowledge character，NACK)。是否支持PSFCH反馈取决于资源池配置以及SCI中的“HARQ重传开启/关闭指示(HARQ feedback enabled/disabled indicator)”字段。
参阅图3A，当支持PSFCH反馈时，R1和R2以及R2和R3之间的时域距离要大于PSFCH所需要的最小处理时间。其中，R1是初传的PSSCH，R2是第一次重传的PSSCH，R3是第二次重传的PSSCH。也就是说，PSSCH的传输时域间隔需要大于PSFCH所需要的最小处理时间。
在NR-V2X中，发送UE可以通过SCI中的“Frequency resource assignment”字段和“Time resource assignment”字段对重传资源进行预约。参阅图3B，PSFCH资源由PSSCH占用的时频资源和高层参数periodPSFCHresource，MinTimeGapPSFCH，sl-PSFCH-RB-Set-r16，numSubchannel确定。其中periodPSFCHresource为PSFCH的周期，每隔periodPSFCHresource时隙会配置一个PSFCH资源，在每一个PSFCH时隙上只有倒数第二个符号会用作PSFCH传输。MinTimeGapPSFCH表示PSSCH与PSFCH之间需要保证的最小间隔。sl-PSFCH-RB-Set-r16表示为资源池配置的PSFCH RB资源，用bitmap指示，numSubchannel表示资源池包括的子信道个数。
参阅图3C，numSubchannel＝2，periodPSFCHresource＝4，sl-PSFCH-RB-Set-r16指示的PSFCH RB的个数为NF＝16，一个子信道上的PSSCH传输对应的PSFCH资源占用16/(2*4)＝2个RB。当需要多个UE需要在同一个PSFCH时频资源上发送时，可采用码分的方式，具体的序列由发送UE的ID和接收UE的ID确定。
LTE-V2X和NR-V2X均存在两种资源分配模式，一种为基站分配资源模式。其中，其中LTE-V2X中称为模式3(mode-3)，NR-V2X称为模式1(mode-1)。另一种为用户自选资源模式。其中，LTE-V2X中称为模式4(mode-4)，NR-V2X称为模式2(mode-2)。基站分配资源模式主要应用于有网络覆盖的情形下的V2X通信，基站统一根据UE的BSR上报情况，集中进行资源分配。资源的分配可以是动态模式或预配置模式。基站分配的资源可以包括初始资源和/或重传资源。
在用户自选资源模式下，发送UE的传输资源不依赖于基站，UE自己选择传输资源进行通信。该模式不受限于网络覆盖，在没有网络覆盖情况下，发送UE也可以用该模式进行通信。用户自选的资源包括初始资源和/或重传资源。
在用户自选资源模式下，发送UE根据自身资源侦听的结果在资源选择窗口内自行选择传输资源进行通信，此时发送UE也可以称为侦听UE。
Figure PCTCN2022097894-appb-000027
定义为属于sidelink资源池的时隙集合。假设侦听UE在时隙n触发资源选择，侦听UE持续侦听该窗口内所有属于sidelink资源池的时隙中除过侦听UE自身进行过传输的时隙之外，剩余 的所有时隙。再根据侦听的结果从资源选择窗口内排除已经被其他UE预约的资源，最终将排除后的资源集合上报给介质访问控制层(media access control，MAC)层，MAC再从中选择最终的传输资源。
然而，上述LTE V2X设备和NR V2X设备共存时，可能因为其中一类设备无法排除另一类设备预约或配置的资源，从而引入额外的干扰。具体的，NR-V2X设备的反馈资源PSFCH是配置在资源池上的，而LTE-V2X设备只支持盲重传，不需要反馈资源。因此，当NR-V2X设备和LTE-V2X设备共同存在同一资源池内时，LTE-V2X设备无法识别NR-V2X设备预配置的PSFCH资源，因此可能在NR-V2X设备的PSFCH资源上传输，造成对NR-V2X设备的PSFCH传输的干扰。
本申请实施例提供的资源指示方法可以应用在V2X和D2D等用户端和用户端直接通信的系统中。本申请实施例提供的技术方案可以适用于有网络覆盖也可以适用于无网络覆盖的通信场景。参阅图4，为适用于本申请实施例提供的资源指示方法的通信系统。通信系统400可以包括用户设备401和用户设备402。可选的，通信系统400还可以包含网络设备403。
其中，用户设备401和用户设备402可以都在网络设备403的覆盖范围内，或者用户设备401和用户设备402中可以有一个不在网络设备403的覆盖范围内。例如，用户设备401不在网络设备的覆盖范围内。或者，用户设备401和用户设备402均不在网络设备403的覆盖范围内，本申请不做具体限定。
其中，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)。基站可用于对信息比特进行编码，并将编码后的信息发送至终端设备。对应的，终端设备接收基站发送的信息，并对该信息进行译码。反过来，终端设备也可用于对信息比特进行编码，并将编码后的信息发送至基站。对应的，基站接收终端设备发送的信息，并对该信息进行译码。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LTE系统或高级长期演进(long term evolution-advanced，LTE-A)中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，或者也可以包括第五代移动通信技术(the 5th generation，5G)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)或用户平面功能(user plane function，UPF)等。本申请实施例由于主要涉及的是接入网，因此在后文中如无特殊说明，则所述的网络设备均是指接入网设备。
用户设备，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。该用户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。该用户设备可以包括用户设备(user equipment，UE)、无线用户设备、移动用户设备、设备到设备通信(device-to-device，D2D)用户设备、车到一切(vehicle to everything，V2X)用户设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)用户设备、物联网(internet of things，IoT)用户设备、签约单元(subscriber unit)、签约站(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)，具有移动用户设备的计算机，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，该用户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。
而如上介绍的各种用户设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载用户设备，车载用户设备例如也称为车载单元(on-board unit，OBU)。
其中，如果考虑Uu(UTRAN-to-UE)空口传输，无线通信的双方包括网络设备和用户设备；考虑SL空口传输，无线通信的收发端都是用户设备。
本申请实施例中，用于实现用户设备的功能的装置可以是用户设备，也可以是能够支持用户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用户设备中。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用户设备为例，描述本申请实施例提供的技术方案。
参阅图5，为本申请实施例提供的资源指示方法的示例性流程图，可以包括以下操作。
S501：第一终端发送第一控制信息和第二控制信息，相应的第二终端接收第一控制信息和第二控制信息。
上述第一控制信息可以用于指示第一资源，第二控制信息可以用于指示反馈资源。第一控制信息和第二控制信息可以是SCI。其中，第一资源可以是PSSCH资源，反馈资源可以是PSFCH资源。
S502：第二终端确定第一资源和反馈资源中的至少一个。
其中，第一资源可以包括反馈资源。例如，反馈资源可以是第一资源中的一部分资源。 或者反馈资源可以用于承载第一资源承载的第一数据所对应的反馈信息。例如，第一资源上可以用于传输第一数据，反馈资源可以用于传输第一数据的反馈信息。
一种可能的实施方式中，上述第一终端和第二终端可以是同一网络制式下的终端。例如，第一终端和第二终端可以是NR-V2X的终端。第一终端可以通过第一控制信息和第二控制信息指示反馈资源和第一资源，与第一终端和第二终端不在同一网络制式下的终端，例如支持LTE V2X的终端，也可以根据第一控制信息识别到第一终端指示的第一资源，从而避免对第一终端和第二终端的数据传输造成干扰。
可选的，上述第一终端和第二终端也可以是不同网络制式下的终端。例如，第一终端可以是NR-V2X系统的终端，第二终端可以是LTE-V2X系统的终端。或者，第一终端可以是LTE-V2X系统的终端，第二终端可以是NR-V2X的终端。虽然第一终端和第二终端为不同网络制式下的终端，但也可以根据第一控制信息和第二控制信息，确定第一终端指示的第一资源和/或反馈资源，从而第二终端可以避免使用第一终端指示的第一资源和反馈资源，因此可以避免对第一终端的数据传输造成干扰。
根据第一控制信息和第二控制信息的指示，第一资源和反馈资源有所不同。以下，以第一控制信息为第一级SCI，第二控制信息为第二级SCI为例，对不同的情况进行介绍。
为了便于理解本申请实施例提供的技术方案，以下对第一级SCI包含的字段进行介绍。示例性的，第一级SCI包含的字段可以与LTE-V2X的SCI格式1(format-1)包含的字段相同。第一级SCI可以采用与LTE-V2X相同的SCI格式，使得LTE-V2X系统的终端可以识别第一资源和反馈资源。具体的，第一级SCI可以包含：
-Priority-3bits，被定义为优先级，可以通过3个比特(bits)指示PSSCH承载的数据优先级。
-Resource reservation–4bits，被定义为资源预约周期，可以通过4bits周期预约资源。
-Frequency resource location of initial transmission and retransmission，被定义为初传和重传的频域资源位置。
-Time gap between initial transmission and retransmission-4bits，被定义为初传和重传的时域间隔，可以通过4bits指示。
-Modulation and coding scheme–5bits，被定义为调制与编码策略。
-Retransmission index–1bit，被定义为重传索引，可以用于指示是否有重传。
-Transmission format–1bit，被定义为传输格式。
-Reserved information bits,预留信息占用的比特个数与其他字段占用的比特个数的总和为32。
需要说明的是，上述第一级SCI的各个字段的用途和取值等，可以参见LTE-V2X的SCI format-1中的各个字段。
以下，对第一级SCI指示的第一资源和第二级SCI指示的反馈信息进行解释和说明。
情况1：第一资源是当前时间单元之后的传输资源。
一种可选的实施方式中，第一级SCI中可以包含第二字段。其中，第二字段取值为第一数值时，可以表示第一终端预约了未来的某个传输资源，如第一资源。例如，第二字段取值为第一数值时，可以是第一终端预约了未来的PSSCH和/或PSFCH。可选的，第二字段可以是上述字段中的“Retransmission index”。在“Retransmission index”的取值为0时，第一级SCI可以用于指示预约的资源(第一资源)。或者，在“Retransmission index”的取 值为1时，第一级SCI可以用于指示预约的资源(第一资源)。
需要说明的是，第一资源在时域上可以在第二资源之后。其中，第二资源在时域上与第一级SCI位于相同的时间单元，第二资源上承载PSSCH的传输，第二级SCI可以包括在PSSCH中。也就是说，第一资源在时域上可以在第一级SCI所在的时间单元之后。所述时间单元的单位可以是符号，时隙，迷你时隙等，本申请不做具体限定。第一级SCI可以占用一个或多个时间单元。第二资源也可以占用一个或多个时间单元。
在一个示例中，第一级SCI可以包括第一字段。其中，第一字段可以用于指示第一资源与第二资源之间的时域间隔。也就是说，第一字段可以用于指示第一资源与第一级SCI的时域间隔。示例性的，第一字段可以是上述字段中的“Time gap between initial transmission and retransmission”。第一资源和第二资源的时域间隔可以由第一字段的取值确定。例如，第一字段取值为10时，可以认为第一资源和第二资源的时域间隔为10个时间单元，如10个时隙。
需要说明的是，上述第一终端预约的资源可以用于自己进行传输。例如，第一终端可以在预约的第一资源上传输PSSCH。或者，第一终端预约的资源也可以用于第一终端的接收终端进行传输，如第二终端的传输。第二终端可以在第一终端预约的第一资源上传输PSFCH和/或PSSCH。例如，第一终端可以在第二级SCI中指示预约的资源是否包括反馈资源。例如，第二级SCI可以包括第三字段，或者第一级SCI的预留字段可以包括第三字段。第三字段可以用于指示是否包括PSFCH资源。如果第三字段指示包括PSFCH资源，则可以表示预约资源的使用对象是第二终端。
当第一资源包括PSFCH资源时，PSFCH资源的具体时频域位置可以在第二级SCI中指示。或者，也可以通过预配置、预定义或者无线资源控制(radio resource control，RRC)信令配置的方式指示。
可选的，PSFCH资源的具体时频位置可以包括反馈资源占用的时域资源，频域资源或码域资源的信息。其中时域资源为PSFCH资源在第一资源中占用的时隙或符号。例如，PSFCH资源在第一资源中的起始符号索引，占用的符号个数等。频域资源为PSFCH资源在第一资源中占用的子信道或资源块。例如，PSFCH资源在第一资源中的起始子信道索引或者资源块索引，占用的子信道或资源块个数等。
参阅图6A，假设第一资源包括在频域上包括10个资源块，在时域上包括一个时隙，即14个符号，时域资源和频域资源的索引编号从0开始。PSFCH资源在频域上占用第一个资源块，假设起始资源块索引为0，占用的资源块个数为1，在时域上占用全部14个符号，起始符号索引为0，占用的符号个数为14。
参阅图6B，假设第一资源包括在频域上包括10个资源块，在时域上包括一个时隙，即14个符号，PSFCH资源在频域上占用全部10个资源块，起始资源块索引为0，占用的资源块个数为10，在时域上占用第13个符号，起始符号索引为12，占用的符号个数为1。
参阅图6C，假设第一资源包括在频域上包括10个资源块，在时域上包括一个时隙，即14个符号，PSFCH资源在频域上占用1至5个资源块，起始资源块索引为0，占用的资源块个数为5，在时域上占用第3个符号，起始符号索引为2，占用的符号个数为1。
当PSFCH在PSFCH资源上通过序列发送时，码域资源为序列循环相位偏移，具体包括m 0和m cs。PSFCH序列可以由基于低峰均比的ZC序列生成，其在时域上占用一个或多个连续的正交OFDM符号，在频域上可以是一个或多个资源块。具体地，PSFCH序列 的生成方式如下：
首先，可以根据序列长度生成一个基础序列r(n)，0≤n＜M ZC，然后对该基础序列r(n)进行相位旋转，得到可以复用的低峰均比序列，该低峰均比序列满足如下公式：
Figure PCTCN2022097894-appb-000028
其中，M ZC＝12，l表示PSFCH传输时隙上的OFDM符号的编号，例如，l＝0表示当前PSFCH传输时隙上的第一个OFDM符号，α l表示相位旋转值。也就是说，可以采用不同的相位旋转值α l，以生成不同的PSFCH序列，并且可以将各个PSFCH序列码分复用在一个物理资源块PRB上进行发送。由于接收端UE需要反馈ACK/NACK信息，因此需要给每个用户分配分别对应于不同取值的α l的至少两个序列。相位旋转值α l可以满足如下公式：
Figure PCTCN2022097894-appb-000029
其中，
Figure PCTCN2022097894-appb-000030
表示一个PRB中的子载波个数，NR系统中
Figure PCTCN2022097894-appb-000031
的取值可以为12。mod()表示取余，
Figure PCTCN2022097894-appb-000032
表示在一个无线帧中当前子载波间隔μ对应的SL传输时隙的编号。l′表示当前PSFCH传输时隙上相对于第一个OFDM符号的符号索引。m 0表示一个PSFCH资源对的初始相位。m cs表示一个PSFCH资源对中ACK/NACK序列相对于初始相位的偏移，其中，一个PSFCH资源对可以用于HARQ-ACK反馈，其中一个序列可以用于反馈ACK，另一个序列用于反馈NACK。m 0的取值可以与同一个PSFCH时频资源上的序列对的个数相关，如表1所示。表1只是一个示例，m 0的取值还可以由其他因素确定，本申请不做限制。
表1：m 0的一种示例
Figure PCTCN2022097894-appb-000033
Figure PCTCN2022097894-appb-000034
表示一个PSFCH时频资源上的序列对的个数，例如当
Figure PCTCN2022097894-appb-000035
时，m 0＝0,
Figure PCTCN2022097894-appb-000036
时，m 0＝0，1，2，3，4，5。m cs的取值可以如表2或表3所示。表2和表3只是一个示例，m cs的取值还可以由其他因素确定，本申请不做限制。
表2：m cs的一种示例
Figure PCTCN2022097894-appb-000037
表3：m cs的一种示例
Figure PCTCN2022097894-appb-000038
第二终端可以在预约的第一资源内，除PSFCH资源之外的剩余资源上传输自己的PSSCH。第二终端可以在PSFCH中向第一终端发送反馈信息，或者也可以向第一终端以外的其他终端发送反馈信息。
参阅图6D，示出了第一级SCI和第二级SCI预约第一资源的示意图。第一终端可以在时间单元t_n发送第一级SCI和第二级SCI。可选的，第一终端还可以在时间单元t_n发送数据。第一级SCI中Retransmission index＝0，第一级SCI中Time gap between initial transmission and retransmission＝gap。因此，可以根据第一级SCI和第二级SCI确定第一终端预约了时间单元t_n+gap的PSSCH资源。可选的，如果第二级SCI中包括第三字段，或者第一级SCI的预留字段可以包括第三字段，则第一终端还预约了PSFCH资源。其中，PSSCH资源中可以包括PSFCH资源。
基于上述方案，当NR-V2X的终端和LTE-V2X的终端共存在同一资源池内时，通过让NR-V2X的终端采用与LTE-V2X的终端相同的SCI格式，使得LTE-V2X的终端可以识别NR-V2X的终端的预约资源，并且该预约资源可以用于NR-V2X的终端的PSFCH传输，避免了LTE-V2X的终端因为无法识别NR-V2X的终端预约，而对NR-V2X的终端的预约资源造成的干扰。
在一个示例中，第二终端在PSFCH资源上传输的反馈信息可以是针对上述第二资源上传输的数据的反馈信息。例如，反馈信息可以是图6D中与第一级SCI和第二级SCI位于相同时间单元t_n上的数据的确认应答(acknowledge character，ACK)或者是非确认应答(non-acknowledge character，NACK)。
参阅图6E，示出了第一级SCI和第二级SCI预约第一资源的示意图。其中，第一终端在时间单元t_n发送了第一级SCI、第二级SCI和第二数据，其中第二级SCI和第二数据承载在第二资源中，第一级SCI指示预约了在时间单元t_n+gap的PSSCH资源。另外，第二级SCI中包括第三字段，或者第一级SCI的预留字段可以包括第三字段。因此，PSSCH资源中还包括PSFCH资源。第一终端可以位于时间单元t_n+gap的PSFCH资源上接收PSFCH，PSFCH中可以包含针对第二数据的反馈信息。
另一种示例中，第二终端在PSFCH中传输的反馈信息所对应的数据可以在第二级SCI中指示。例如，第一终端可以通过第二级SCI中的源索引和目的索引中的至少一个指示预约的PSFCH资源上携带的PFSCH所对应的第二数据。其中，源索引可以是“PSFCH源ID(PSFCH Source ID)”，目的索引可以是“PSFCH目的ID(PSFCH Destination ID)”。
需要说明的是，上述PSFCH Source ID和PSFCH Destination ID专用于指示PSFCH所对应的PSSCH。与NR-V2X系统中第二级SCI包含的Source ID字段和Destination ID字段不同。NR-V2X中的Source ID字段和Destination ID字段是为了指示当前的PSSCH承载的数据的源索引和目的索引。
可选的，第二终端可以将第二级SCI中的PSFCH Source ID和PSFCH Destination ID，与之前接收到的PSSCH对应的Source ID和Destination ID进行比较，如果相同，则表示第一终端预约的PSFCH资源用于传输该之前接收到的PSSCH的PSFCH。
再一个示例中，第二终端在PSFCH中传输的反馈信息所对应的数据还可以通过第二级SCI中的“PSFCH HARQ进程序号(PSFCH HARQ process number)”和“PSFCH新数据指示(PSFCH)New data indicator”指示。
需要说明的是，上述“PSFCH HARQ process number”和“PSFCH New data indicator”专用于指示PSFCH对应的PSSCH，与NR-V2X中第二级SCI指示的“HARQ process number”和“New data indicator”字段不同。NR-V2X的“HARQ process number”和“New data indicator”字段是为了指示当前PSSCH承载的数据的HARQ信息。
可选的，第二终端可以将第二级SCI中的“PSFCH HARQ process number”和“PSFCH New data indicator”，与之前接收到的PSSCH对应的“HARQ process number”和“New data indicator”相比较。如果相同，则表示第一终端预约的PSFCH资源用于传输该之前接收到的PSSCH的PSFCH。
第一终端可以根据接收到的PSFCH上反馈的HARQ结果，确定是否对在PSSCH上发送的数据进行重传。
参阅图6F，示出了第一级SCI和第二级SCI预约第一资源的示意图。其中，第一终端在时间单元t_n发送了第一级SCI、第二级SCI。其中，第一级SCI指示预约了在时间单元t_n+gap的PSSCH资源。另外，第二级SCI中包括第三字段，或者第一级SCI的预留字段可以包括第三字段。因此，PSSCH资源中还包括PSFCH资源。第一终端可以位于时间单元t_n+gap的PSFCH资源上接收PSFCH。由于第二级SCI中包含了源索引和目的索引，因此该PSFCH所对应的第三数据可以根据源索引和目的索引确定。
基于上述方案，当NR-V2X终端和LTE-V2X终端共存在同一资源池内时，通过让NR-V2X终端采用与LTE-V2X终端相同的SCI格式，使得LTE-V2X终端可以识别NR-V2X终端的预约资源，并且该预约资源可以用于NR-V2X终端的PSFCH传输，避免了LTE-V2X终端因为无法识别NR-V2X终端的预约，而对NR-V2X终端的预约资源造成的干扰。
一种可选的实施方式中，第一级SCI中还包括第四字段，该第四字段用于指示第一资源所占用的频域资源。例如，第四字段可以是“Frequency resource location of initial transmission and retransmission”。因此，可以通过“Time gap between initial transmission and retransmission”，“Frequency resource location of initial transmission and retransmission”和“Retransmission index”字段来前向预约PSSCH资源和PSFCH资源。
情况2：第一资源是当前时间单元之前的传输资源。
一种可选的实施方式中，第一级SCI中可以包含第二字段。其中，第二字段的取值为第二数值时，可以表示第一资源为当前时间单元之前的某个传输资源，当前时间单元可以是第一级SCI发送的时间单元。第一资源可以是第二终端的发送资源，如可以是第二终端的PSSCH。可选的，第二字段可以是上述字段中的“Retransmission index”。在“Retransmission index”的取值为0时，第一级SCI可以用于指示当前时间单元之前的传输资源(第一资源)。或者，在“Retransmission index”的取值为1时，第一级SCI可以用于指示当前时间单元之前的传输资源(第一资源)。
需要说明的是，第一资源在时域上可以在第二资源之前。其中，第二资源在时域上可以与第一级SCI位于相同的时间单元，第二资源上承载PSSCH的传输，第二级SCI可以包括在PSSCH中。也就是说，第一资源在时域上可以在第一级SCI所在的时间单元之前。
在一个示例中，第一级SCI可以包括第一字段。其中，第一字段可以用于指示第一资源与第二资源之间的时域间隔。也就是说，第一字段可以用于指示第一资源与第一级SCI的时域间隔。示例性的，第一字段可以是上述字段中的“Time gap between initial transmission  and retransmission”。第一资源和第二资源的时域间隔可以由第一字段的取值确定。例如，第一字段取值为10时，可以认为第一资源和第二资源的时域间隔为10个时间单元，如10个时隙。
需要说明的是，在第一终端发送第一级SCI和第二级SCI之前，可以通过监听的方式自主选择第二资源，用于传输PSSCH和/或PSFCH。其中，监听的方式自主选择资源的方法可以参见前述的相关描述，此处不再赘述。
其中，第二级SCI中可以包括一个标识字段，如第三字段，或者第一级SCI的预留字段可以包括第三字段，指示第一终端自主选择的资源中包含PSFCH资源。第一终端在该PSFCH资源上传输的反馈信息可以是针对第一资源上接收到的PSSCH中的数据的反馈信息。第二终端可以通过第一终端发送的第一级SCI和第二级SCI，识别来自第一终端的PSFCH对应的PSSCH。其中，识别方式可以有以下两种。
第一种方式：将PSFCH资源与第一级SCI指示的第一资源进行绑定，即只要第三字段指示第二资源中包含PSFCH资源，并且第一级SCI中指示了当前时间单元之前的第一资源，则PSFCH上传输的反馈信息与第一级SCI指示的历史的第一资源中的PSSCH对应。
第二种方式：一种显示的指示方式。例如，可以通过一个字段指示PSFCH待传输的反馈信息与第一级SCI指示的历史的第一资源中的PSSCH对应。其中，该字段可以是新增字段，或者也可以复用现有的字段。
参阅图7，示出了第一级SCI和第二级SCI指示第一资源的示意图。第一终端可以在时间单元t_n上发送第一级SCI和第二级SCI。其中，第二级SCI指示第二资源上还包括PSFCH资源，也就是说第一终端在PSFCH上发送了反馈信息。第一级SCI中Retransmission index＝1，Time gap between initial transmission and retransmission＝gap。也就是说，第一终端可以通过第一级SCI和第二级指示PSFCH传输的是针对位于时间单元t_n-gap的第一资源上的第一数据的反馈信息。
可选的，在第一级SCI中的“Resource reservation”字段不为零时，表示第一终端周期预约了自主选择的第二资源。第一终端自主选择的第二资源可以用于向第二终端传输自己的PSFCH和/或PSSCH。其中，PSFCH的具体时频域位置可以在第二级SCI中指示，或者也可以通过预配置、预定义或者RRC信令配置的方式指示，具体可以参见情况1中的相关描述，与情况1的区别在于，PSFCH的资源是包括在第二资源中，此处不再赘述。
在一个示例中，第一级SCI中还包括第四字段，该第四字段用于指示第一资源所占用的频域资源。例如，第四字段可以是“Frequency resource location of initial transmission and retransmission”。因此，可以通过“Time gap between initial transmission and retransmission”，“Frequency resource location of initial transmission and retransmission”和“Retransmission index”字段来前向指示PSFCH所对应的PSSCH。
基于上述方案，当NR-V2X终端和LTE-V2X终端共存在同一资源池内时，NR-V2X终端可以自主选择PSFCH和/或PSSCH资源，并且为了减小盲检复杂度，让NR-V2X终端采用与LTE-V2X终端相同的SCI格式，使得NR-V2X终端和LTE-V2X终端可以识别NR-V2X终端的预约的PSFCH资源和对应的PSSCH资源，避免了LTE-V2X终端因为无法识别NR-V2X的预约的PSFCH资源，而对NR-V2X终端的预约的PSFCH资源造成的干扰。
情况3：第一资源为当前时间单元上的传输资源。
其中，第一资源在时域上可以与第一级SCI位于相同的时间单元。
一种可选的实施方式中，由于第一级SCI中的字段“Time gap between initial transmission and retransmission”只能指示有限的时域间隔，PSFCH资源上传输的反馈信息对应的PSSCH上的数据可以在第二级SCI中指示。因此，第一级SCI中的Time gap between initial transmission and retransmission可以等于0，或者可以是保留值。
第二级SCI中可以包括一个标识字段，如第三字段，或者第一级SCI的预留字段可以包括第三字段，指示第一终端自主选择的第一资源中包含PSFCH资源。第一终端在该PSFCH资源上传输的反馈信息可以是针对第四数据的反馈信息。
一个示例中，第四数据可以通过第二级SCI中的源索引和/或目的索引指示。例如，可以通过第二级SCI中的“PSFCH Source ID”和“PSFCH Destination ID”字段来指示，具体可以参见上述情况1中的相关描述，此处不再赘述。
另一个示例中第四数据的可以通过还可以通过第二级SCI中的“PSFCH HARQ process number”和“PSFCH New data indicator”指示，具体可以参见上述情况1中的相关描述，此处不再赘述。
第一终端的接收终端，如第二终端可以根据PSFCH上反馈的HARQ结果，确定是否对第四数据进行重传。
可选的，在第一级SCI中的“Resource reservation”字段不为零时，表示第一终端周期预约了自主选择的第一资源。第一终端自主选择的第一资源可以用于向第二终端传输自己的PSFCH和/或PSSCH。其中，PSFCH的具体时频域位置可以在第二级SCI中指示，具体可以参见情况1中的相关描述，此处不再赘述。
参阅图8，示出了第一级SCI和第二级SCI指示第一资源和第四数据的示意图。其中，第一终端可以在时间单元t_n上发送第一级SCI和第二级SCI。其中，第二级SCI指示第一资源上还包括PSFCH资源，也就是说第一终端在PSFCH上发送了反馈信息。第一级SCI中PSFCH对应的第四数据可以通过第二级SCI中的源索引和目的索引指示的。也就是说，第二级SCI中包含的源索引和目的索引可以指示第四数据，第一终端发送的反馈信息是针对第四数据的。
基于上述方案，当NR-V2X终端和LTE-V2X共存在同一资源池内时，通过NR-V2X的接收UE可以自主选择PSFCH和/或PSSCH资源，并且为了减小盲检复杂度，让NR-V2X采用与LTE-V2X相同的SCI格式，使得NR-V2X和LTE-V2X用户可以识别NR-V2X的预约资源和对应的PSSCH资源，避免了LTE-V2X因为无法识别NR-V2X的预约，而对NR-V2X的预约资源造成的干扰。
可以理解的是，为了实现上述实施例中功能，第一终端和第二终端包括了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本申请中所公开的实施例描述的各示例的单元及方法步骤，本申请能够以硬件或硬件和计算机软件相结合的形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用场景和设计约束条件。
图9和图10为本申请的实施例提供的可能的通信装置的结构示意图。这些通信装置可以用于实现上述方法实施例中第一终端或第二终端的功能，因此也能实现上述方法实施例所具备的有益效果。在本申请的实施例中，该通信装置可以是如图4所示的用户设备401 和用户设备402中的一个，还可以是应用于终端的模块(如芯片)。
如图9所示，通信装置900包括处理单元910和收发单元920。通信装置900用于实现上述图5或图7中所示的方法实施例中第一终端或第二终端的功能。
当通信装置900用于实现图5所示的方法实施例中第一终端的功能时：处理单元910，用于生成第一控制信息和第二控制信息。第一控制信息用于指示第一资源；第二控制信息用于指示反馈资源；第一资源包括反馈资源，或者反馈资源用于承载第一资源承载的第一数据所对应的反馈信息。收发单元920，用于发送第一控制信息和第二控制信息。
当通信装置900用于实现图5所示的方法实施例中第二终端的功能时：收发单元920，用于接收第一控制信息和第二控制信息。第一控制信息用于指示第一资源；第二控制信息用于指示反馈资源；第一资源包括反馈资源，或者反馈资源用于承载第一资源承载的第一数据所对应的反馈信息。处理单元910，用于确定第一资源和反馈资源中的至少一个。
有关上述处理单元910和收发单元920更详细的描述可以直接参考图5至图7所示的方法实施例中相关描述直接得到，这里不加赘述。
如图10所示，通信装置1000包括处理器1010和接口电路1020。处理器1010和接口电路1020之间相互耦合。可以理解的是，接口电路1020可以为收发器或输入输出接口。可选的，通信装置1000还可以包括存储器1030，用于存储处理器1010执行的指令或存储处理器1010运行指令所需要的输入数据或存储处理器1010运行指令后产生的数据。
当通信装置1000用于实现图5所示的方法时，处理器1010用于实现上述处理单元910的功能，接口电路1020用于实现上述收发单元920的功能。
当上述通信装置为应用于终端的芯片时，该终端芯片实现上述方法实施例中第一终端的功能。该终端芯片从终端中的其它模块(如射频模块或天线)接收信息，该信息是第二终端或基站发送给第一终端的；或者，该终端芯片向第一终端中的其它模块(如射频模块或天线)发送信息，该信息是第一终端发送给第二终端或基站的。
当上述通信装置为应用于基站的模块时，该基站模块实现上述方法实施例中第二终端的功能。该终端芯片从终端中的其它模块(如射频模块或天线)接收信息，该信息是第一终端或基站发送给第二终端的；或者，该终端芯片向第二终端中的其它模块(如射频模块或天线)发送信息，该信息是第二终端发送给第一终端或基站的。
可以理解的是，本申请的实施例中的处理器可以是中央处理单元(Central Processing Unit，CPU)，还可以是其它通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器、闪存、只读存储器、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于基站或终端中。当然，处理器和存储介质也可以作为分立组件存在于基站或终端中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、网络设备、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘；还可以是半导体介质，例如，固态硬盘。该计算机可读存储介质可以是易失性或非易失性存储介质，或可包括易失性和非易失性两种类型的存储介质。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本申请中，“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。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系；在本申请的公式中，字符“/”，表示前后关联对象是一种“相除”的关系。“包括A，B和C中的至少一个”可以表示：包括A；包括B；包括C；包括A和B；包括A和C；包括B和C；包括A、B和C。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。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。

Claims (30)

  1. 一种资源指示方法，其特征在于，包括：
    第一终端发送第一控制信息和第二控制信息；
    其中，所述第一控制信息用于指示第一资源；所述第二控制信息用于指示反馈资源；所述第一资源包括所述反馈资源，或者所述反馈资源用于承载所述第一资源承载的第一数据所对应的反馈信息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一控制信息包括第一字段；所述第一字段用于指示所述第一资源与第二资源之间的时域间隔，所述第二资源在时域上与所述第一控制信息位于相同的时间单元。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一控制信息包括第二字段；所述第二字段取值为第一数值时，所述第一资源为所述第一终端预约的资源；所述第一资源在时域上位于第二资源之后，所述第二资源在时域上与所述第一控制信息位于相同的时间单元。
  4. 根据权利要求3所述的方法，其特征在于，所述第二控制信息包括第三字段；所述第三字段用于指示所述第一资源包括所述反馈资源。
  5. 根据权利要求3或4所述的方法，其特征在于，还包括：
    所述第一终端在所述反馈资源上接收第二数据对应的反馈信息，所述第二数据为所述第一终端在所述第二资源上发送的数据。
  6. 根据权利要求3或4所述的方法，其特征在于，所述第二控制信息包括第一索引和/或第二索引；所述第一索引用于标识第三数据的源索引，所述第二索引用于标识所述第三数据的目的索引。
  7. 根据权利要求6所述的方法，其特征在于，还包括：
    所述第一终端在所述反馈资源上接收所述第三数据对应的反馈信息。
  8. 根据权利要求1或2所述的方法，其特征在于，所述第一控制信息包括第二字段；所述第二字段取值为第二数值时，所述第一资源为第二终端的发送资源；所述第一资源在时域上位于第二资源之前，所述第二资源在时域上与所述第一控制信息位于相同的时间单元。
  9. 根据权利要求8所述的方法，其特征在于，所述第二控制信息包括第三字段；所述第三字段用于指示所述第二资源包括所述反馈资源。
  10. 根据权利要求8或9所述的方法，其特征在于，还包括：
    所述第一终端在所述反馈资源上发送所述第一数据对应的反馈信息。
  11. 根据权利要求1或2所述的方法，其特征在于，所述第二控制信息包括第三字段；所述第三字段用于指示所述第一资源包括所述反馈资源，所述第一资源在时域上与所述第一控制信息位于相同的时间单元。
  12. 根据权利要求11所述的方法，其特征在于，所述第二控制信息包括第一索引和/或第二索引；所述第一索引用于标识第四数据的源索引，所述第二索引用于标识所述第四数据的目的索引。
  13. 根据权利要求12所述的方法，其特征在于，还包括：
    所述第一终端在所述反馈资源上发送所述第四数据对应的反馈信息。
  14. 一种资源指示方法，其特征在于，包括：
    第二终端接收第一控制信息和第二控制信息；
    其中，所述第一控制信息用于指示第一资源；所述第二控制信息用于指示反馈资源；所述第一资源包括所述反馈资源，或者所述反馈资源用于承载所述第一资源承载的第一数据所对应的反馈信息。
  15. 根据权利要求14所述的方法，其特征在于，所述第一控制信息包括第一字段；所述第一字段用于指示所述第一资源与第二资源之间的时域间隔，所述第二资源在时域上与所述第一控制信息位于相同的时间单元。
  16. 根据权利要求14或15所述的方法，其特征在于，所述第一控制信息包括第二字段；所述第二字段取值为第一数值时，所述第一资源为所述第一终端预约的资源；所述第一资源在时域上位于第二资源之后，所述第二资源在时域上与所述第一控制信息位于相同的时间单元。
  17. 根据权利要求16所述的方法，其特征在于，所述第二控制信息包括第三字段；所述第三字段用于指示所述第一资源包括所述反馈资源。
  18. 根据权利要求16或17所述的方法，其特征在于，还包括：
    所述第二终端在所述反馈资源上发送第二数据对应的反馈信息，所述第二数据为所述第一终端在所述第二资源上发送的数据。
  19. 根据权利要求16或17所述的方法，其特征在于，所述第二控制信息包括第一索引和/或第二索引；所述第一索引用于标识第三数据的源索引，所述第二索引用于标识所述第三数据的目的索引。
  20. 根据权利要求19所述的方法，其特征在于，还包括：
    所述第二终端在所述反馈资源上发送所述第三数据对应的反馈信息。
  21. 根据权利要求14或15所述的方法，其特征在于，所述第一控制信息包括第二字段；所述第二字段取值为第二数值时，所述第一资源为所述第二终端的发送资源；所述第一资源在时域上位于第二资源之前，所述第二资源在时域上与所述第一控制信息位于相同的时间单元。
  22. 根据权利要求21所述的方法，其特征在于，所述第二控制信息包括第三字段；所述第三字段用于指示所述第二资源包括所述反馈资源。
  23. 根据权利要求21或22所述的方法，其特征在于，还包括：
    所述第二终端在所述反馈资源上接收所述第一数据对应的反馈信息。
  24. 根据权利要求14或15所述的方法，其特征在于，所述第二控制信息包括第三字段；所述第三字段用于指示所述第一资源包括所述反馈资源，所述第一资源在时域上与所述第一控制信息位于相同的时间单元。
  25. 根据权利要求24所述的方法，其特征在于，所述第二控制信息包括第一索引和/或第二索引；所述第一索引用于标识第四数据的源索引，所述第二索引用于标识所述第四数据的目的索引。
  26. 根据权利要求25所述的方法，其特征在于，还包括：
    所述第二终端在所述反馈资源上接收所述第四数据对应的反馈信息。
  27. 一种通信装置，其特征在于，用于执行如权利要求1～13中任一项所述的方法，或者用于执行如权利要求14～26中任一项所述的方法。
  28. 一种通信装置，其特征在于，所述装置包括处理器和存储器，
    所述存储器，用于存储计算机程序或指令；
    所述处理器，用于执行存储器中的计算机程序或指令，使得权利要求1～13中任一项所述的方法被执行或者使得权利要求14～26任一项所述的方法被执行。
  29. 一种计算机存储介质，其特征在于，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令在被计算机调用时，使所述计算机执行如权利要求1～13任一项所述的方法或者执行如权利要求14～26任一项所述的方法。
  30. 一种计算机程序产品，其特征在于，包含计算机可执行指令，当所述指令在计算机上运行时，使得如权利要求1～13中任一项所述的方法被执行；或者如权利要求14～26中任一项所述的方法被执行。
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