WO2020192425A1 - 用于v2x业务的反馈资源确定方法及装置、存储介质、终端 - Google Patents

用于v2x业务的反馈资源确定方法及装置、存储介质、终端 Download PDF

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Publication number
WO2020192425A1
WO2020192425A1 PCT/CN2020/078817 CN2020078817W WO2020192425A1 WO 2020192425 A1 WO2020192425 A1 WO 2020192425A1 CN 2020078817 W CN2020078817 W CN 2020078817W WO 2020192425 A1 WO2020192425 A1 WO 2020192425A1
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Prior art keywords
resource
time domain
time slot
domain position
symbol
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English (en)
French (fr)
Inventor
曲鑫
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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Priority to EP20778168.3A priority Critical patent/EP3952522B1/en
Priority to US17/599,484 priority patent/US12069619B2/en
Publication of WO2020192425A1 publication Critical patent/WO2020192425A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to the field of communication technology, in particular to a method and device, storage medium, and terminal for determining feedback resources for V2X services.
  • NR New Radio
  • LTE Long Term Evolution
  • NRV2X can support three data transmission modes: unicast, multicast and broadcast in order to meet the various business needs of the Internet of Vehicles.
  • 3GPP has reached an agreement through discussion to introduce feedback mechanisms in unicast and multicast, such as hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ for short) feedback mechanism .
  • the HARQ feedback content is included in the secondary link feedback control information (Sidelink Feedback Control Information, referred to as SFCI) for transmission, and this information is transmitted through the secondary link physical layer feedback channel (Physical Sidelink Feedback Channel, referred to as PSFCH, can be referred to as secondary chain for short) Channel feedback channel) bearer.
  • SFCI Secondary Link Feedback Control Information
  • PSFCH Physical Sidelink Feedback Channel
  • PSFCH Physical Sidelink Feedback Channel
  • the latest agreement further determines: the time difference between the secondary link physical layer data channel (Physical Sidelink Shared Channel, PSSCH, or secondary link data channel) and its associated secondary link feedback channel can be configured or pre-configured through the network Obtained by configuration.
  • the secondary link physical layer data channel Physical Sidelink Shared Channel, PSSCH, or secondary link data channel
  • resource pools are configured for the secondary link data channel and secondary link physical layer control channel (PSCCH, also known as the Women’s Federation Record Control Channel) through network configuration or pre-configuration.
  • PSCCH secondary link physical layer control channel
  • the resource pool contains multiple resources.
  • UE User Equipment
  • the technical problem solved by the present invention is how to ensure that the UE in the NR V2X scenario can efficiently and accurately determine the resources of the secondary link feedback channel.
  • an embodiment of the present invention provides a method for determining feedback resources for V2X services, including: acquiring a first resource set, the first resource set including the time domain location of at least one first resource,
  • the first resource is the PSSCH transmission resource; for each first resource, the candidate time domain position of the second resource corresponding to the first resource is determined according to the time domain position of the first resource and the associated feedback information.
  • the second resource is the transmission resource of the PSFCH, and the associated feedback information is used to indicate the time difference between the PSSCH and the PSFCH; for each candidate time domain position, it is determined whether the symbol occupied by the candidate time domain position includes an unusable symbol.
  • the symbol used refers to the symbol that cannot be used to transmit the second resource; when the judgment result indicates that the symbol occupied by the candidate time domain position does not contain unusable symbols, it is determined that the candidate time domain position is the second resource. Domain location.
  • the determining that the candidate time domain position is the time domain position of the second resource when the judgment result indicates that the symbol occupied by the candidate time domain position does not include an unusable symbol includes: when the judgment result indicates When the symbol occupied by the candidate time domain location does not include unusable symbols, it is determined whether the time slot in which the candidate time domain location is located includes a third resource, and the third resource is a PSSCH or PSCCH transmission resource, and the second The data transmission direction of the third resource is different from the data transmission direction of the first resource; when the judgment result indicates that the time slot in which the candidate time domain position is located contains the third resource, it is determined that the candidate time domain position is the second The time domain location of the resource.
  • the third resource is a receiving resource; when the first resource is a receiving resource, the third resource is a sending resource.
  • the determining that the candidate time domain position is the time domain position of the second resource when the judgment result indicates that the symbol occupied by the candidate time domain position does not include an unusable symbol includes: when the judgment result indicates When the symbol occupied by the candidate time domain location does not include unusable symbols, it is determined whether the time slot in which the candidate time domain location is located includes a fourth resource, where the fourth resource is a PSSCH or PSCCH transmission resource, and the first The data transmission direction of the fourth resource is the same as or different from the data transmission direction of the first resource; when the judgment result shows that the time slot in which the candidate time domain location is located contains the fourth resource, it is determined that the candidate time domain location is the The time domain location of the second resource.
  • the fourth resource when the first resource is a sending resource, the fourth resource is a receiving resource or a sending resource; when the first resource is a receiving resource, the fourth resource is a receiving resource or a sending resource.
  • the determining the candidate time domain position of the second resource corresponding to the first resource according to the time domain position of the first resource and associated feedback information includes: according to the time slot where the end position of the first resource is located And the associated feedback information to determine the candidate time slot where the second resource is located; determine the candidate of the second resource in the candidate time slot according to the position information of the configured or pre-configured second resource in the time slot Time domain location.
  • the second resource is a receiving resource; when the first resource is a receiving resource, the second resource is a sending resource.
  • the first resource set is obtained through configuration or pre-configuration; the associated feedback information is determined through configuration or pre-configuration, and the first resource set corresponds to the associated feedback information one-to-one .
  • the first resource and the second resource are resources of a secondary link and multiplex transmission resources of a Uu link
  • the unavailable symbols include downlink symbols of the Uu link.
  • the unavailable symbol further includes a flexible symbol of the Uu link.
  • the feedback resource determination method further includes: before determining whether the symbol occupied by the candidate time domain position contains an unusable symbol, determining whether the UE is in the network coverage area; when the determination result indicates that the UE is in the network coverage area When other than that, each candidate time domain position is determined as the time domain position of the second resource.
  • An embodiment of the present invention also provides a feedback resource determining device for V2X services, including: an acquisition module, configured to acquire a first resource set, the first resource set including the time domain location of at least one first resource, The first resource is the PSSCH transmission resource; the first determining module, for each first resource, determines the candidate time domain of the second resource corresponding to the first resource according to the time domain location of the first resource and associated feedback information Position, the second resource is a PSFCH transmission resource, and the associated feedback information is used to indicate the time difference between PSSCH and PSFCH; the first judgment module, for each candidate time domain position, judges the time domain position occupied by the candidate time domain position Whether the symbol contains an unusable symbol, the unavailable symbol refers to a symbol that cannot be used to transmit the second resource; the second determining module, when the judgment result indicates that the symbol occupied by the candidate time domain position does not contain an unusable symbol, It is determined that the candidate time domain location is the time domain location of the second resource.
  • the embodiment of the present invention also provides a storage medium on which computer instructions are stored, and the computer instructions execute the steps of the foregoing method when the computer instructions are executed.
  • An embodiment of the present invention also provides a terminal, including a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor executes the steps of the foregoing method when the computer instructions are executed.
  • the embodiment of the present invention provides a method for determining a feedback resource for a V2X service, including: acquiring a first resource set, the first resource set including a time domain position of at least one first resource, and the first resource is a PSSCH Transmission resource; for each first resource, the candidate time domain position of the second resource corresponding to the first resource is determined according to the time domain position of the first resource and the associated feedback information, and the second resource is PSFCH transmission Resource, the associated feedback information is used to indicate the time difference between PSSCH and PSFCH; for each candidate time domain position, determine whether the symbol occupied by the candidate time domain position includes an unusable symbol, and the unavailable symbol means unavailable When the symbol of the second resource is transmitted; when the judgment result indicates that the symbol occupied by the candidate time domain position does not include an unusable symbol, the candidate time domain position is determined to be the time domain position of the second resource.
  • the UE adopting the solution described in this embodiment can efficiently and accurately determine the resources of the secondary link feedback channel without requiring additional signaling configuration and reducing signaling overhead.
  • the time difference between the PSSCH and the PSFCH is determined based on the associated feedback information, and for each first resource, the time domain position of the first resource is added to the time difference to obtain the candidate time domain position of the corresponding second resource . Further, determine whether the candidate time domain position can be used as the time domain position of the second resource according to the discrimination result of the symbol occupied by the candidate time domain position, so as to filter out the candidate time domain positions that contain unusable symbols in the candidate time domain position position.
  • the judgment result indicates that the symbol occupied by the candidate time domain position does not include unusable symbols
  • the time domain location is the time domain location of the second resource.
  • the solution of this embodiment preferentially uses the candidate time domain position in the time slot that already contains the fourth resource as the time domain position of the second resource, which can effectively avoid the transmission of the Uu link multiplexed by the resources of the secondary link.
  • the resource (especially the transmission resource of the Uu link that does not include the fourth resource) is frequently interrupted.
  • the judgment result indicates that the symbols occupied by the candidate time domain position do not include unusable symbols
  • the location is the time domain location of the second resource.
  • the solution of this embodiment preferably uses the candidate time domain position in the time slot that already contains the third resource as the time domain position of the second resource, which can effectively avoid the transmission of the Uu link multiplexed by the resources of the secondary link.
  • the resource (especially the transmission resource of the Uu link that does not include the fourth resource) is frequently interrupted.
  • the solution of the present embodiment can ensure that the UE only needs to transmit data in the same direction in this time slot, and does not need to frequently perform transceiver switching operations in a single time slot, making it possible to reduce the complexity of the UE.
  • FIG. 1 is a flowchart of a method for determining feedback resources for V2X services according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a specific implementation of step S102 in FIG. 1;
  • FIG. 3 is a schematic diagram of communication in a typical application scenario of an embodiment of the present invention.
  • Fig. 4 is a schematic diagram of a process of determining a feedback resource in which the method shown in Fig. 1 is applied to the scenario shown in Fig. 3;
  • Fig. 5 is a schematic diagram of another feedback resource determination process applying the method shown in Fig. 1 to the scenario shown in Fig. 3;
  • Fig. 6 is a flowchart of a variation of the feedback resource determination method shown in Fig. 1;
  • FIG. 7 is a schematic diagram of a process of determining a feedback resource in which the method shown in FIG. 6 is applied to the scenario shown in FIG. 3;
  • FIG. 8 is a schematic diagram of another feedback resource determination process applying the method shown in FIG. 6 to the scenario shown in FIG. 3;
  • FIG. 9 is a flowchart of another variation of the feedback resource determination method shown in FIG. 1;
  • FIG. 10 is a schematic diagram of a process of determining a feedback resource in which the method shown in FIG. 9 is applied to the scenario shown in FIG. 3;
  • FIG. 11 is a schematic diagram of another feedback resource determination process applying the method shown in FIG. 9 to the scenario shown in FIG. 3;
  • Fig. 12 is a schematic structural diagram of an apparatus for determining feedback resources for V2X services according to an embodiment of the present invention.
  • the existing secondary link feedback mechanism in the NR V2X scenario is not perfect, so that the UE in the NR V2X scenario cannot determine the resource for the secondary link feedback channel from the network configuration or pre-configured resource pool. .
  • an embodiment of the present invention provides a method for determining feedback resources for V2X services, including: acquiring a first resource set, the first resource set including the time domain location of at least one first resource,
  • the first resource is the PSSCH transmission resource; for each first resource, the candidate time domain position of the second resource corresponding to the first resource is determined according to the time domain position of the first resource and the associated feedback information.
  • the second resource is the transmission resource of the PSFCH, and the associated feedback information is used to indicate the time difference between the PSSCH and the PSFCH; for each candidate time domain position, it is determined whether the symbol occupied by the candidate time domain position includes an unusable symbol.
  • the symbol used refers to the symbol that cannot be used to transmit the second resource; when the judgment result indicates that the symbol occupied by the candidate time domain position does not contain unusable symbols, it is determined that the candidate time domain position is the second resource. Domain location.
  • the UE adopting the solution described in this embodiment can efficiently and accurately determine the resources of the secondary link feedback channel without requiring additional signaling configuration to reduce signaling overhead.
  • the time difference between the PSSCH and the PSFCH is determined based on the associated feedback information, and for each first resource, the time domain position of the first resource is added to the time difference to obtain the candidate time domain position of the corresponding second resource .
  • Fig. 1 is a flowchart of a method for determining feedback resources for V2X services according to an embodiment of the present invention.
  • the solution of this embodiment can be applied to an Internet of Vehicles scenario, such as an NR V2X scenario.
  • the solution of this embodiment may be executed by the user equipment side, for example, executed by a UE acting as a sender and/or a receiver, and the UE may use the feedback resource determined by the solution of this embodiment to perform HARQ in a unicast or multicast manner. Feedback.
  • the feedback resource determination method described in this embodiment may include the following steps:
  • Step S101 Obtain a first resource set, where the first resource set includes a time domain location of at least one first resource, and the first resource is a PSSCH transmission resource;
  • Step S102 For each first resource, determine a candidate time domain position of a second resource corresponding to the first resource according to the time domain position of the first resource and associated feedback information, where the second resource is PSFCH transmission Resource, the associated feedback information is used to indicate the time difference between PSSCH and PSFCH;
  • Step S103 For each candidate time domain position, determine whether the symbol occupied by the candidate time domain position includes an unusable symbol, and the unusable symbol refers to a symbol that cannot be used to transmit the second resource;
  • the feedback resource determination method may further include step S104, determining that the candidate time domain location is the time domain location of the second resource .
  • the feedback resource determination method may further include step S105, determining that the candidate time domain position is not the time domain of the second resource position.
  • the first resource and the second resource are both resources of the secondary link, and the resources of the secondary link are multiplexed by the resources allocated by the base station to the UE for data transmission through the Uu interface (which can be It is called the transmission resource of Uu link).
  • the base station may allocate a resource pool for the UE in a configuration or pre-configuration manner, and the resource pool may be shared by the Uu link and the secondary link.
  • the resource pool may include a sending resource pool and a receiving resource pool.
  • the first resource set may be obtained through configuration or pre-configuration. Through the first resource set, the specific time domain position of each first resource included in the first resource set in the resource pool can be indicated.
  • the determination by configuration means indicating by downlink signaling (such as RRC signaling) sent in advance by the base station.
  • downlink signaling such as RRC signaling
  • the determination by means of preconfiguration refers to: presetting in a subscriber identification module (Subscriber Identification Module, SIM card for short) associated with the UE.
  • Subscriber Identification Module Subscriber Identification Module
  • the unavailable symbol may refer to a symbol occupied by the transmission resource of the Uu link that cannot be multiplexed by the secondary link.
  • the unavailable symbols may include downlink symbols of Uu link.
  • the non-downlink symbols may include uplink (Uplink) symbols and flexible (Flexible) symbols.
  • the flexible symbol means that the data transmission direction on the symbol can be adjusted according to the configuration or the manner dynamically indicated by the base station.
  • the unavailable symbols may include Uu link downlink (Downlink) symbols and flexible symbols.
  • the symbols occupied by the candidate time domain position are all uplink symbols of the Uu link, it may be determined that the candidate time domain position is the time domain position of the second resource.
  • the uplink symbols and non-downlink symbols correspond to the semi-static uplink and downlink time slot structure configuration of the NR Uu link, including the cell-specific semi-static uplink and downlink time slot structure configuration (Cell-specific semi-static DL/UL assignment ), and UE-specific semi-static DL/UL assignment based on UE-specific semi-static uplink and downlink time slots.
  • Cell-specific semi-static DL/UL assignment the cell-specific semi-static uplink and downlink time slot structure configuration
  • UE-specific semi-static DL/UL assignment UE-specific semi-static DL/UL assignment based on UE-specific semi-static uplink and downlink time slots.
  • the secondary link will not reuse the downlink symbols of the Uu link. Therefore, the unavailable symbol may also refer to a symbol that cannot be used to transmit the first resource.
  • the associated feedback information may include time difference information between the configured or pre-configured PSSCH and PSFCH. For example, when the bit value of the associated feedback information is non-zero, the bit value is the time difference between the PSSCH and the PSFCH. For another example, when the bit value of the associated feedback information is zero, it indicates that the base station has not configured corresponding feedback resources for the UE.
  • the associated feedback information may include indication information about whether there is a corresponding feedback resource, and when the indication information indicates that there is a corresponding feedback resource, the time difference between the PSSCH and the PSFCH.
  • the associated feedback information may be 3 bits in size, where the first bit is used to indicate whether there is a corresponding feedback resource, assuming 0 means no and 1 means yes. Further, when the value of the first bit is 1, the following two bits are used to indicate the time difference between the PSSCH and the PSFCH. Assume that 00 indicates that the time difference is 1 time slot, 01 indicates that the time difference is 2 time slots, 10 indicates that the time difference is 3 time slots, and 11 indicates that the time difference is 4 time slots.
  • the associated feedback information may be determined through configuration or pre-configuration.
  • first resource set and the associated feedback information may have a one-to-one correspondence.
  • different associated feedback information may be configured or pre-configured.
  • the time difference included in the associated feedback information corresponding to the first resource set 1 may be 1 time slot
  • the time difference included in the associated feedback information corresponding to the first resource set 2 may be 2 time slots.
  • the second resource when the first resource is a sending resource, the second resource may be a receiving resource.
  • the first resource set may be a PSSCH transmission resource set, and the second resource may be a PSFCH receiving resource.
  • the second resource when the first resource is a receiving resource, the second resource may be a sending resource.
  • the first resource set may be a PSSCH reception resource set, and the second resource may be a PSCCH transmission resource.
  • the step S102 may include the following steps:
  • Step S1021 Determine the candidate time slot where the second resource is located according to the time slot where the end position of the first resource is located and the associated feedback information;
  • Step S1022 Determine the candidate time domain position of the second resource in the candidate time slot according to the position information of the configured or pre-configured second resource in the time slot.
  • the end position of the first resource may refer to the position of the last symbol occupied by the first resource on the time slot.
  • the time difference between the PSSCH and the PSFCH indicated in the associated feedback information may be a time slot difference.
  • the time slot where the last symbol occupied by the first resource is located can be determined, and the time slot is added to the time slot difference indicated by the associated feedback information to obtain the The candidate time slots.
  • step S1022 it is assumed that the last symbol of the first resource is located in time slot 5, the time slot difference is 3 time slots, and the second resource indicated by configuration or pre-configuration is located in time slot 5. If the symbol 12 to the symbol 13 in the slot, it can be determined that the second resource is located in the symbol 12 to the symbol 13 of the slot 8.
  • UE61 and UE62 perform unicast communication, UE61 sends unicast data to UE62, and UE62 sends HARQ feedback information according to the decoding result after receiving the unicast data sent by UE61.
  • the unicast data is carried by the PSSCH, and the HARQ feedback information is carried by the PSFCH.
  • the unicast data communication and HARQ feedback communication between UE61 and UE62 both use the resources of the secondary link for transmission.
  • the resources of the secondary link share the transmission resources of the Uu link. Therefore, in order to determine the transmission resources available for the PSFCH, the UE 62 and the UE 61 need to determine the feedback resources allocated by the base station 63 corresponding to the PSSCH transmission. Among them, the base station 63 is used to maintain the network communication of the cell 1.
  • FIG. 4 exemplarily shows the time domain position of the transmission resource of the Uu link allocated by the base station 63 in a 20 millisecond (ms) time slot.
  • the transmission resource of the Uu link repeats in the time domain with a period of 10 ms.
  • time slot structure of a Uu link in a 10ms period is DDXUUDXXXU, where each letter represents the direction of a time slot: D represents downlink, X represents flexible, and U represents Up.
  • D represents downlink
  • X represents flexible
  • U represents Up.
  • the direction of time slot 0 is D, indicating that the data transmission direction of time slot 0 is downlink, and the symbols of this time slot are all downlink symbols
  • the direction of time slot 2 is X, indicating that the data transmission direction of time slot 2 is flexible.
  • the symbols of this time slot are all flexible symbols
  • the direction of time slot 3 is U, which means that the data transmission direction of time slot 3 is uplink
  • the symbols of this time slot are all uplink symbols.
  • the resources of the secondary link cannot reuse the downlink symbols of the Uu link.
  • the UE61 and the UE62 are performing unicast communication. , Can not use time slot 0, time slot 1 and time slot 5 for data transmission and HARQ feedback.
  • each PSSCH receiving resource only occupies symbol 3 to symbol 11 of the corresponding time slot.
  • the base station configures the PSSCH receiving resource set to have associated feedback resources, and the associated feedback information indicates that the time difference between the PSSCH and the PSFCH is 2 time slots.
  • UE62 when UE62 receives data in the configured PSSCH receiving resource set and needs feedback, corresponding to the feedback resource determination method shown in Figure 1 and Figure 2, UE62 can locate the end position of each receiving resource in the PSSCH receiving resource set.
  • the time slot is added to the time difference to obtain a candidate time slot.
  • time slot 2 is added to the time difference of 2 time slots to obtain time slot 4; time slot 4 is added to the time difference of 2 time slots to obtain time slot 6; 6 plus the time difference of 2 time slots, you can get time slot 8; add time slot 7 to the time difference of 2 time slots, you can get time slot 9; add time slot 8 to the time difference of 2 time slots, you can get Time slot 0 of the next system frame (ie, system frame n+1).
  • the PSFCH transmission resource in the PSFCH transmission resource set can be determined to be located at the symbol 11 to the symbol 12 of the time slot by means of configuration or preconfiguration.
  • Symbol 11 to symbol 12 of time slot 9 and symbol 11 to symbol 12 of time slot 0 of system frame n+1 are candidate time domain positions of PSFCH transmission resources in this example. These slot positions can form the PSFCH candidate transmission resource set in this example.
  • time slot 4 and time slot 9 of system frame n correspond to the uplink rather than downlink of the Uu link
  • symbols 11 to 12 of the time slot 4 and time slot 9 can be used as the time slot positions of the PSFCH transmission resource set .
  • time slot 6 and time slot 8 of system frame n correspond to the flexibility of the Uu link instead of downlink
  • symbols 11 to 12 of time slot 6 and time slot 8 can be used as the time slot positions of the PSFCH transmission resource set .
  • the symbol 11 to the symbol 12 of the time slot 0 cannot be used as a time slot position of the PSFCH transmission resource set.
  • the finally determined PSFCH transmission resource set includes symbols 11 to 12 of slot 4, slot 6, slot 8, and slot 9. However, symbols 11 to 12 of time slot 0 in the PSFCH candidate transmission resource set are discarded.
  • the final PSFCH transmission resource set includes only symbols 11 to 12 of slot 4 and slot 9 .
  • the symbols 11 to 12 of time slot 6, time slot 8 and time slot 0 in the PSFCH candidate transmission resource set are discarded.
  • FIG. 5 exemplarily shows the time domain position of the transmission resource of the Uu link allocated by the base station 63 in a 20 millisecond (ms) time slot.
  • the transmission resource of the Uu link repeats in the time domain with a period of 10 ms.
  • time slot structure of a Uu link in a 10ms period is DDXUUDXXXU, where each letter represents the direction of a time slot: D represents downlink, X represents flexible, and U represents Up.
  • D represents downlink
  • X represents flexible
  • U represents Up.
  • the direction of time slot 0 is D, indicating that the data transmission direction of time slot 0 is downlink, and the symbols of this time slot are all downlink symbols
  • the direction of time slot 2 is X, indicating that the data transmission direction of time slot 2 is flexible.
  • the symbols of this time slot are all flexible symbols
  • the direction of time slot 3 is U, which means that the data transmission direction of time slot 3 is uplink
  • the symbols of this time slot are all uplink symbols.
  • the resources of the secondary link cannot reuse the downlink symbols of the Uu link.
  • the UE61 and UE62 are performing unicast communication. , Can not use time slot 0, time slot 1 and time slot 5 for data transmission and HARQ feedback.
  • each PSSCH transmission resource only occupies symbol 3 to symbol 11 of the corresponding time slot.
  • the base station configures the PSSCH transmission resource set to have associated feedback resources, and the associated feedback information indicates that the time difference between the PSSCH and the PSFCH is 2 time slots.
  • UE61 when UE61 sends data in the configured PSSCH transmission resource set and needs to receive feedback, corresponding to the feedback resource determination method shown in Figure 1 and Figure 2, UE61 can set the end position of each transmission resource in the PSSCH transmission resource set Add the time difference to the time slot to obtain a candidate time slot.
  • time slot 2 is added to the time difference of 2 time slots to obtain time slot 4; time slot 4 is added to the time difference of 2 time slots to obtain time slot 6; 6 plus the time difference of 2 time slots, you can get time slot 8; add time slot 7 to the time difference of 2 time slots, you can get time slot 9; add time slot 8 to the time difference of 2 time slots, you can get Time slot 0 of the next system frame (ie, system frame n+1).
  • the PSFCH receiving resource in the PSFCH receiving resource set can be determined to be located in the symbol 11 to the symbol 12 of the time slot by means of configuration or pre-configuration.
  • Symbol 11 to symbol 12 of time slot 9 and symbol 11 to symbol 12 of time slot 0 of system frame n+1 are candidate time domain positions of PSFCH receiving resources in this example. These slot positions can form the PSFCH candidate receiving resource set in this example.
  • time slot 4 and time slot 9 of system frame n correspond to the uplink rather than downlink of the Uu link
  • symbols 11 to 12 of the time slot 4 and time slot 9 can be used as the time slot positions of the PSFCH receiving resource set .
  • time slot 6 and time slot 8 of system frame n correspond to the flexibility of the Uu link instead of downlink
  • symbols 11 to 12 of time slot 6 and time slot 8 can be used as the time slot positions of the PSFCH receiving resource set. .
  • the symbol 11 to the symbol 12 of the time slot 0 cannot be used as a time slot position of the PSFCH receiving resource set.
  • the finally determined PSFCH receiving resource set includes symbols 11 to 12 of time slot 4, time slot 6, time slot 8, and time slot 9.
  • the symbols 11 to 12 of slot 0 in the PSFCH candidate receiving resource set are discarded.
  • the final PSFCH receiving resource set includes only the symbols 11 to 12 of the slots 4 and 9 .
  • symbols 11 to 12 of slot 6, slot 8 and slot 0 in the PSFCH candidate receiving resource set are discarded.
  • the NR V2X UE can efficiently and accurately determine the resources of the secondary link feedback channel, without the need for additional signaling configuration to reduce signaling overhead.
  • the time difference between the PSSCH and the PSFCH is determined based on the associated feedback information, and for each first resource, the time domain position of the first resource is added to the time difference to obtain the candidate time domain position of the corresponding second resource . Further, determine whether the candidate time domain position can be used as the time domain position of the second resource according to the discrimination result of the symbol occupied by the candidate time domain position, so as to filter out the candidate time domain positions that contain unusable symbols in the candidate time domain position position.
  • the feedback resource determination method of this embodiment may further include the following steps:
  • Step S106 When the judgment result indicates that the symbol occupied by the candidate time domain position does not include unusable symbols, judge whether the time slot in which the candidate time domain position is located contains a third resource, and the third resource is the PSSCH or PSCCH. Transmission resources, and the data transmission direction of the third resource is different from the data transmission direction of the first resource;
  • step S106 When the judgment result of step S106 indicates that the time slot in which the candidate time domain location is located includes the third resource, execute step S104 to determine that the candidate time domain location is the time domain location of the second resource;
  • step S106 determines that the candidate time domain location is not the time domain location of the second resource .
  • the UE complexity can be reduced while ensuring the integrity of the Uu link transmission resources.
  • the solution of this embodiment preferably uses the candidate time domain position in the time slot that already contains the third resource as the time domain position of the second resource, which can effectively avoid the transmission of the Uu link multiplexed by the resources of the secondary link.
  • the resource (especially the transmission resource of the Uu link that does not include the fourth resource) is frequently interrupted.
  • the solution of the present embodiment can ensure that the UE only needs to transmit data in the same direction in this time slot, and does not need to frequently perform transceiver switching operations in a single time slot, making it possible to reduce the complexity of the UE.
  • the third resource may also be a resource of a secondary link.
  • the third resource may be obtained through configuration or pre-configuration. For example, by configuring or pre-configuring the third resource set, the specific time domain position of each third resource included in the third resource set in the resource pool can be indicated.
  • the second resource when the first resource is a sending resource, the second resource may be a receiving resource, and the third resource may be a receiving resource.
  • the first resource set may be a PSSCH transmission resource set
  • the second resource may be a PSFCH receiving resource
  • the third resource may be a PSSCH receiving resource or a PSCCH receiving resource.
  • the second resource when the first resource is a receiving resource, the second resource may be a sending resource, and the third resource may be a sending resource.
  • the first resource set may be a PSSCH reception resource set
  • the second resource may be a PSFCH transmission resource
  • the third resource may be a PSSCH transmission resource or a PSCCH transmission resource.
  • FIG. 7 exemplarily shows the time domain position of the transmission resource of the Uu link allocated by the base station 63 in a 20 millisecond (ms) time slot.
  • the transmission resource of the Uu link repeats in the time domain with a period of 10 ms.
  • time slot structure of a Uu link in a 10ms period is DDXUUDXXXU, where each letter represents the direction of a time slot: D represents downlink, X represents flexible, and U represents Up.
  • D represents downlink
  • X represents flexible
  • U represents Up.
  • the direction of time slot 0 is D, indicating that the data transmission direction of time slot 0 is downlink, and the symbols of this time slot are all downlink symbols
  • the direction of time slot 2 is X, indicating that the data transmission direction of time slot 2 is flexible.
  • the symbols of this time slot are all flexible symbols
  • the direction of time slot 3 is U, which means that the data transmission direction of time slot 3 is uplink
  • the symbols of this time slot are all uplink symbols.
  • the resources of the secondary link cannot reuse the downlink symbols of the Uu link.
  • the UE61 and the UE62 are performing unicast communication. , Can not use time slot 0, time slot 1 and time slot 5 for data transmission and HARQ feedback.
  • each PSSCH receiving resource only occupies symbol 3 to symbol 11 of the corresponding time slot.
  • the base station configures the PSSCH receiving resource set to have associated feedback resources, and the associated feedback information indicates that the time difference between the PSSCH and the PSFCH is 2 time slots.
  • UE62 when UE62 receives the data sent to it in the configured PSSCH receiving resource set and needs feedback, corresponding to the feedback resource determination method shown in FIG. 1 and FIG. 2, UE62 can receive each PSSCH receiving resource set.
  • the time slot where the end position of the resource is located is added to the time difference to obtain a candidate time slot.
  • time slot 2 is added to the time difference of 2 time slots to get time slot 4; time slot 4 is added to the time difference of 2 time slots to get time slot 6; 6 plus the time difference of 2 time slots, you can get time slot 8; add time slot 7 to the time difference of 2 time slots, you can get time slot 9; add time slot 8 to the time difference of 2 time slots, you can get Time slot 0 of the next system frame (ie, system frame n+1).
  • the PSFCH transmission resource in the PSFCH transmission resource set can be determined to be located at the symbol 11 to the symbol 12 of the time slot by means of configuration or preconfiguration.
  • Symbol 11 to symbol 12 of time slot 9 and symbol 11 to symbol 12 of time slot 0 of system frame n+1 are candidate time domain positions of PSFCH transmission resources in this example. These slot positions can form the PSFCH candidate transmission resource set in this example.
  • the symbol 11 to the symbol 12 of the time slot 0 cannot be used as a time slot position of the PSFCH transmission resource set.
  • the time domain position of each PSSCH transmission resource in the PSSCH transmission resource set of the UE 62 can be determined by configuration or preconfiguration. Specifically to the example shown in FIG. 7, it is assumed that the time domain position of the PSSCH transmission resource included in the PSSCH transmission resource set is consistent with the time domain position of the PSSCH reception resource included in the PSSCH reception resource set.
  • the PSFCH candidate transmission resources that do not meet the requirements in the PSFCH candidate transmission resource set can be further screened out based on the PSSCH transmission resource set.
  • time slot 4 and time slot 8 contain PSSCH transmission resources
  • symbols 11 to 12 of time slot 4 time slot 6 and time slot 8 can be used as the time slot positions of the PSFCH transmission resource set.
  • time slot 9 does not contain PSSCH transmission resources, symbols 11 to 12 of time slot 9 cannot be used as a slot position of the PSFCH transmission resource set.
  • the finally determined PSFCH transmission resource set includes symbols 11 to 12 of time slot 4, time slot 6, and time slot 8.
  • time slot 9 and symbols 11 to 12 of time slot 0 are discarded.
  • the determined PSFCH transmission resource set includes only symbols 11 to 12 of slot 4.
  • the symbols 11 to 12 of time slot 6, time slot 8, time slot 9 and time slot 0 in the PSFCH candidate transmission resource set are discarded.
  • FIG. 7 takes the PSSCH transmission resource set as an example for specific description. In practical applications, those skilled in the art can also use the PSCCH transmission resource set as a screening criterion to determine a suitable PSFCH transmission resource set.
  • the specific process of this embodiment will be described in detail by taking the first resource set as the PSSCH transmission resource set, the second resource as the PSFCH receiving resource, and the third resource as the transmission resource in the PSSCH receiving resource set.
  • FIG. 8 exemplarily shows the time domain position of the Uu link transmission resource allocated by the base station 63 in a 20 millisecond (ms) time slot.
  • the transmission resource of the Uu link repeats in the time domain with a period of 10 ms.
  • time slot structure of a Uu link in a 10ms period is DDXUUDXXXU, where each letter represents the direction of a time slot: D represents downlink, X represents flexible, and U represents Up.
  • D represents downlink
  • X represents flexible
  • U represents Up.
  • the direction of time slot 0 is D, indicating that the data transmission direction of time slot 0 is downlink, and the symbols of this time slot are all downlink symbols
  • the direction of time slot 2 is X, indicating that the data transmission direction of time slot 2 is flexible.
  • the symbols of this time slot are all flexible symbols
  • the direction of time slot 3 is U, which means that the data transmission direction of time slot 3 is uplink
  • the symbols of this time slot are all uplink symbols.
  • the resources of the secondary link cannot reuse the downlink symbols of the Uu link.
  • the UE61 and the UE62 are performing unicast communication. , Can not use time slot 0, time slot 1 and time slot 5 for data transmission and HARQ feedback.
  • each PSSCH transmission resource only occupies symbol 3 to symbol 11 of the corresponding time slot.
  • the base station configures the PSSCH transmission resource set to have associated feedback resources, and the associated feedback information indicates that the time difference between the PSSCH and the PSFCH is 2 time slots.
  • UE61 when UE61 sends data in the configured PSSCH transmission resource set and needs to receive feedback, corresponding to the feedback resource determination method shown in Figure 1 and Figure 2, UE61 can set the end position of each transmission resource in the PSSCH transmission resource set Add the time difference to the time slot to obtain a candidate time slot.
  • time slot 2 is added to the time difference of 2 time slots to get time slot 4; time slot 4 is added to the time difference of 2 time slots to get time slot 6; 6 plus the time difference of 2 time slots, you can get time slot 8; add time slot 7 to the time difference of 2 time slots, you can get time slot 9; add time slot 8 to the time difference of 2 time slots, you can get Time slot 0 of the next system frame (ie, system frame n+1).
  • the PSFCH receiving resource in the PSFCH receiving resource set can be determined to be located in the symbol 11 to the symbol 12 of the time slot by means of configuration or pre-configuration.
  • Symbol 11 to symbol 12 of time slot 9 and symbol 11 to symbol 12 of time slot 0 of system frame n+1 are candidate time domain positions of PSFCH receiving resources in this example. These slot positions can form the PSFCH candidate receiving resource set in this example.
  • the symbol 11 to the symbol 12 of the time slot 0 cannot be used as a time slot position of the PSFCH receiving resource set.
  • the time domain position of each PSSCH receiving resource in the PSSCH receiving resource set of the UE 61 can be determined by configuration or pre-configuration. Specifically to the example shown in FIG. 8, it is assumed that the time domain position of the PSSCH reception resource included in the PSSCH reception resource set is consistent with the time domain position of the PSSCH transmission resource included in the PSSCH transmission resource set.
  • time slot 4 and time slot 8 contain PSSCH reception resources
  • symbols 11 to 12 of time slot 4 time slot 6 and time slot 8 can be used as the time slot positions of the PSFCH reception resource set.
  • slot 9 does not contain PSSCH reception resources, symbols 11 to 12 of slot 9 cannot be used as a slot position of the PSFCH reception resource set.
  • the finally determined PSFCH receiving resource set includes symbols 11 to 12 of slot 4, slot 6 and slot 8.
  • time slot 9 and symbols 11 to 12 of time slot 0 are discarded.
  • the determined PSFCH receiving resource set includes only symbols 11 to 12 of slot 4.
  • the symbols 11 to 12 of time slot 6, time slot 8, time slot 9 and time slot 0 in the PSFCH candidate receiving resource set are discarded.
  • FIG. 8 takes the PSSCH receiving resource set as an example for specific explanation, and in practical applications, those skilled in the art can also use the PSCCH receiving resource set as a screening criterion to determine a suitable PSFCH receiving resource set.
  • the feedback resource determination method of this embodiment may further include the following steps :
  • Step S107 When the judgment result indicates that the symbol occupied by the candidate time domain position does not contain unusable symbols, judge whether the time slot in which the candidate time domain position is located contains a fourth resource, and the fourth resource is the PSSCH or PSCCH. Transmission resources, and the data transmission direction of the fourth resource is the same as or different from the data transmission direction of the first resource;
  • step S104 is executed to determine that the candidate time domain position is the time domain position of the second resource.
  • step S107 when the judgment result of step S107 indicates that the time slot in which the candidate time domain location is located does not contain the third resource, perform step S105 to determine that the candidate time domain location is not the time domain location of the second resource .
  • the solution of this embodiment preferentially uses the candidate time domain position in the time slot that already contains the fourth resource as the time domain position of the second resource, which can effectively avoid the transmission of the Uu link multiplexed by the resources of the secondary link.
  • the resource (especially the transmission resource of the Uu link that does not include the fourth resource) is frequently interrupted.
  • the fourth resource may also be a resource of a secondary link.
  • the fourth resource may be acquired through configuration or pre-configuration. For example, by configuring or pre-configuring the fourth resource set, the specific time domain position of each fourth resource included in the fourth resource set in the resource pool can be indicated.
  • the second resource when the first resource is a sending resource, the second resource may be a receiving resource, and the fourth resource may be a receiving resource or a sending resource.
  • the first resource set may be a PSSCH transmission resource set
  • the second resource may be a PSFCH reception resource
  • the fourth resource may be a PSSCH reception resource, a PSCCH reception resource, a PSSCH transmission resource or a PSCCH transmission resource.
  • the second resource when the first resource is a receiving resource, the second resource may be a sending resource, and the fourth resource may be a receiving resource or a sending resource.
  • the first resource set may be a PSSCH receiving resource set
  • the second resource may be a PSFCH sending resource
  • the fourth resource may be a PSSCH receiving resource, a PSCCH receiving resource, a PSSCH sending resource or a PSCCH sending resource.
  • the specific process of this embodiment is described in detail by taking the first resource set as the PSSCH receiving resource set, the second resource being the PSFCH sending resource, and the fourth resource being the transmission resource in the PSSCH sending resource set or the PSSCH receiving resource set as examples.
  • FIG. 10 exemplarily shows the time domain position of the Uu link transmission resource allocated by the base station 63 in a 20 millisecond (ms) time slot.
  • the transmission resource of the Uu link repeats in the time domain with a period of 10 ms.
  • time slot structure of a Uu link in a 10ms period is DDXUUDXXXU, where each letter represents the direction of a time slot: D represents downlink, X represents flexible, and U represents Up.
  • D represents downlink
  • X represents flexible
  • U represents Up.
  • the direction of time slot 0 is D, indicating that the data transmission direction of time slot 0 is downlink, and the symbols of this time slot are all downlink symbols
  • the direction of time slot 2 is X, indicating that the data transmission direction of time slot 2 is flexible.
  • the symbols of this time slot are all flexible symbols
  • the direction of time slot 3 is U, which means that the data transmission direction of time slot 3 is uplink
  • the symbols of this time slot are all uplink symbols.
  • the resources of the secondary link cannot reuse the downlink symbols of the Uu link.
  • the UE61 and the UE62 are performing unicast communication. , Can not use time slot 0, time slot 1 and time slot 5 for data transmission and HARQ feedback.
  • each PSSCH receiving resource only occupies symbol 3 to symbol 11 of the corresponding time slot.
  • the base station configures the PSSCH receiving resource set to have associated feedback resources, and the associated feedback information indicates that the time difference between the PSSCH and the PSFCH is 2 time slots.
  • UE62 when UE62 receives the data sent to it in the configured PSSCH receiving resource set and needs feedback, corresponding to the feedback resource determination method shown in FIG. 1 and FIG. 2, UE62 can receive each PSSCH receiving resource set.
  • the time slot where the end position of the resource is located is added to the time difference to obtain a candidate time slot.
  • time slot 2 is added to the time difference of 2 time slots to obtain time slot 4; time slot 4 is added to the time difference of 2 time slots to obtain time slot 6; 6 plus the time difference of 2 time slots, you can get time slot 8; add time slot 7 to the time difference of 2 time slots, you can get time slot 9; add time slot 8 to the time difference of 2 time slots, you can get Time slot 0 of the next system frame (ie, system frame n+1).
  • the PSFCH transmission resource in the PSFCH transmission resource set can be determined to be located at the symbol 11 to the symbol 12 of the time slot by means of configuration or preconfiguration.
  • Symbol 11 to symbol 12 of time slot 9 and symbol 11 to symbol 12 of time slot 0 of system frame n+1 are candidate time domain positions of PSFCH transmission resources in this example. These slot positions can form the PSFCH candidate transmission resource set in this example.
  • the symbol 11 to the symbol 12 of the time slot 0 cannot be used as a time slot position of the PSFCH transmission resource set.
  • the time domain position of each PSSCH transmission resource in the PSSCH transmission resource set of the UE 62 can be determined by configuration or preconfiguration. Specifically to the example shown in FIG. 10, it is assumed that the PSSCH transmission resources included in the PSSCH transmission resource set are located in time slot 2, time slot 4, time slot 6, and time slot 7 in a 10 ms period.
  • time slot 4 and time slot 6 contain both PSSCH reception resources and PSSCH transmission resources
  • symbols 11 to 12 of time slot 4 and time slot 6 can be used as the slot positions of the PSFCH transmission resource set.
  • time slot 8 contains PSSCH reception resources
  • symbol 11 to symbol 12 of time slot 8 can also be used as time slot positions in the PSFCH transmission resource set.
  • time slot 9 neither contains PSSCH transmission resources nor PSSCH reception resources, symbols 11 to 12 of time slot 9 cannot be used as a slot position of the PSFCH transmission resource set.
  • the finally determined PSFCH transmission resource set includes symbols 11 to 12 of slot 4, slot 6, and slot 8.
  • slots 9 and symbols 11 to 12 of slot 0 are discarded.
  • the finally determined PSFCH transmission resource set includes only symbol 11 to symbol 12 of slot 4.
  • the symbols 11 to 12 of time slot 6, time slot 8, time slot 9 and time slot 0 in the PSFCH candidate transmission resource set are discarded.
  • Fig. 10 takes PSSCH transmission resource collection and PSSCH reception resource collection as examples for specific explanations. In practical applications, those skilled in the art can also use PSCCH transmission resource collection and PSCCH reception resource collection as the selection criteria. Determine the appropriate PSFCH transmission resource set.
  • the specific process of this embodiment is described in detail by taking the first resource set as the PSSCH transmission resource set, the second resource as the PSFCH receiving resource, and the fourth resource being the transmission resource in the PSSCH receiving resource set or the PSSCH sending resource set as examples.
  • FIG. 11 exemplarily shows the time domain position of the transmission resource of the Uu link allocated by the base station 63 in a 20 millisecond (ms) time slot.
  • the transmission resource of the Uu link repeats in the time domain with a period of 10 ms.
  • time slot structure of a Uu link in a 10ms period is DDXUUDXXXU, where each letter represents the direction of a time slot: D represents downlink, X represents flexible, and U represents Up.
  • D represents downlink
  • X represents flexible
  • U represents Up.
  • the direction of time slot 0 is D, indicating that the data transmission direction of time slot 0 is downlink, and the symbols of this time slot are all downlink symbols
  • the direction of time slot 2 is X, indicating that the data transmission direction of time slot 2 is flexible.
  • the symbols of this time slot are all flexible symbols
  • the direction of time slot 3 is U, which means that the data transmission direction of time slot 3 is uplink
  • the symbols of this time slot are all uplink symbols.
  • the resources of the secondary link cannot reuse the downlink symbols of the Uu link.
  • the UE61 and the UE62 are performing unicast communication. , Can not use time slot 0, time slot 1 and time slot 5 for data transmission and HARQ feedback.
  • each PSSCH transmission resource only occupies symbol 3 to symbol 11 of the corresponding time slot.
  • the base station configures the PSSCH transmission resource set to have associated feedback resources, and the associated feedback information indicates that the time difference between the PSSCH and the PSFCH is 2 time slots.
  • UE61 when UE61 sends data in the configured PSSCH transmission resource set and needs to receive feedback, corresponding to the feedback resource determination method shown in Figure 1 and Figure 2, UE61 can set the end position of each transmission resource in the PSSCH transmission resource set Add the time difference to the time slot to obtain a candidate time slot.
  • time slot 2 is added to the time difference of 2 time slots to get time slot 4;
  • time slot 4 is added to the time difference of 2 time slots to get time slot 6; 6 plus the time difference of 2 time slots, you can get time slot 8; add time slot 7 to the time difference of 2 time slots, you can get time slot 9; add time slot 8 to the time difference of 2 time slots, you can get Time slot 0 of the next system frame (ie, system frame n+1).
  • the PSFCH receiving resource in the PSFCH receiving resource set can be determined to be located in the symbol 11 to the symbol 12 of the time slot by means of configuration or pre-configuration.
  • Symbol 11 to symbol 12 of time slot 9 and symbol 11 to symbol 12 of time slot 0 of system frame n+1 are candidate time domain positions of PSFCH receiving resources in this example. These slot positions can form the PSFCH candidate receiving resource set in this example.
  • the symbol 11 to the symbol 12 of the time slot 0 cannot be used as a time slot position of the PSFCH receiving resource set.
  • the time domain position of each PSSCH receiving resource in the PSSCH receiving resource set of the UE 61 can be determined by configuration or pre-configuration. Specifically to the example shown in FIG. 11, it is assumed that the PSSCH receiving resources included in the PSSCH receiving resource set are located in time slot 2, time slot 4, time slot 6, and time slot 7 in a 10 ms period.
  • time slot 4 and time slot 6 contain both PSSCH reception resources and PSSCH transmission resources
  • symbols 11 to 12 of time slot 4 and time slot 6 can be used as time slot positions of the PSFCH reception resource set.
  • time slot 8 contains PSSCH transmission resources
  • symbols 11 to 12 of time slot 8 can also be used as time slot positions in the PSFCH reception resource set.
  • time slot 9 does not include PSSCH reception resources and PSSCH transmission resources, the symbol 11 to symbol 12 of time slot 9 cannot be used as a time slot position of the PSFCH reception resource set.
  • the finally determined PSFCH receiving resource set includes symbols 11 to 12 of slot 4, slot 6 and slot 8.
  • time slot 9 and symbols 11 to 12 of time slot 0 are discarded.
  • the finally determined PSFCH receiving resource set includes only symbols 11 to 12 of slot 4.
  • the symbols 11 to 12 of time slot 6, time slot 8, time slot 9 and time slot 0 in the PSFCH candidate receiving resource set are discarded.
  • Fig. 11 takes PSSCH reception resource collection and PSSCH transmission resource collection as examples for specific explanations. In practical applications, those skilled in the art can also use PSCCH reception resource collection and PSCCH transmission resource collection as the selection criteria. Determine the appropriate PSFCH receiving resource set.
  • the solutions of the embodiments shown in FIG. 1 to FIG. 11 may be used to determine the time domain position of the feedback receiving resource, and the frequency domain position of the feedback receiving resource may be determined according to other technologies. Further, the feedback information corresponding to the sent secondary link data is received on the determined feedback receiving time-frequency resource.
  • the solutions of the embodiments shown in FIG. 1 to FIG. 11 may be used to determine the time domain position of the feedback transmission resource, and the frequency domain position of the feedback transmission resource may be determined according to other technologies. Further, the feedback information corresponding to the received secondary link data is sent on the determined feedback sending time-frequency resource.
  • the above-mentioned embodiments shown in Figures 1 to 11 may be adapted to be executed by a UE within the network coverage area, and for a UE outside the network coverage area, the implementation described in Figure 1 In the example, steps S103 to S105 can be omitted.
  • the symbols occupied by each candidate time domain position can be considered as available symbols.
  • the candidate time domain position may be directly determined as the time domain position of the second resource.
  • the feedback resource determination method described in this embodiment may further include the step of determining whether the UE is within the network coverage before determining whether the symbol occupied by the candidate time domain position contains an unusable symbol; when the determination result indicates that the UE When it is outside the network coverage, each candidate time domain location is determined as the time domain location of the second resource.
  • the solution of this embodiment can be more targetedly applied to UEs in different positions.
  • Fig. 12 is a schematic structural diagram of an apparatus for determining feedback resources for V2X services according to an embodiment of the present invention.
  • the feedback resource determining device 3 for V2X services may be referred to as the feedback resource determining device 3 for short
  • the feedback resource determining device 3 for short can be used to implement the methods described in the embodiments shown in FIG. 1 to FIG. 11 Technical solutions.
  • the feedback resource determining device 3 may include: an acquiring module 31, configured to acquire a first resource set, where the first resource set includes the time domain position of at least one first resource, and The first resource is the PSSCH transmission resource; the first determining module 32, for each first resource, determines the candidate time of the second resource corresponding to the first resource according to the time domain location of the first resource and the associated feedback information Domain location, the second resource is a PSFCH transmission resource, and the associated feedback information is used to indicate the time difference between PSSCH and PSFCH; the first judging module 33, for each candidate time domain location, judges the candidate time domain location Whether the occupied symbol includes an unavailable symbol, the unavailable symbol refers to a symbol that cannot be used to transmit the second resource; the second determining module 34, when the judgment result indicates that the symbol occupied by the candidate time domain position does not include an unavailable symbol Symbol, it is determined that the candidate time domain position is the time domain position of the second resource.
  • the second determining module 34 may include: a first determining sub-module 341, when the determination result indicates that the symbol occupied by the candidate time domain position does not include an unusable symbol, determining where the candidate time domain position is Whether the time slot contains a third resource, the third resource is a PSSCH or PSCCH transmission resource, and the data transmission direction of the third resource is different from the data transmission direction of the first resource; the first determining submodule 342, when When the judgment result indicates that the time slot where the candidate time domain location is located includes the third resource, it is determined that the candidate time domain location is the time domain location of the second resource.
  • the third resource may be a receiving resource; when the first resource is a receiving resource, the third resource may be a sending resource.
  • the second determination module 34 may: a second determination sub-module 343, when the determination result indicates that the symbol occupied by the candidate time domain position does not include an unusable symbol, determine the candidate time domain position Whether the time slot contains a fourth resource, the fourth resource is a PSSCH or PSCCH transmission resource, and the data transmission direction of the fourth resource is the same as or different from the data transmission direction of the first resource; second determining submodule 344.
  • the judgment result indicates that the time slot in which the candidate time domain location is located includes the fourth resource, determine that the candidate time domain location is the time domain location of the second resource.
  • the fourth resource is a receiving resource or a sending resource; when the first resource is a receiving resource, the fourth resource is a receiving resource or a sending resource.
  • the first determining module 32 may include: a third determining submodule 321, configured to determine the second resource according to the time slot where the end position of the first resource is located and the associated feedback information The candidate time slot in which it is located; the fourth determining sub-module 322 is configured to determine the candidate time domain position of the second resource in the candidate time slot according to the position information of the configured or pre-configured second resource in the time slot.
  • the second resource when the first resource is a sending resource, the second resource may be a receiving resource; when the first resource is a receiving resource, the second resource may be a sending resource.
  • the first resource set may be obtained through configuration or pre-configuration; the associated feedback information may be determined through configuration or pre-configuration.
  • the first resource and the second resource may be resources of a secondary link and multiplex transmission resources of a Uu link, and the unavailable symbols may include downlink symbols of the Uu link.
  • the unavailable symbol may also include a flexible symbol of the Uu link.
  • the feedback resource determining device 3 may further include: a second determining module 35, configured to determine whether the UE is in network coverage before determining whether the symbol occupied by the candidate time domain position includes an unusable symbol Within the range; the third determining module 36, when the determination result indicates that the UE is outside the network coverage, determines each candidate time domain location as the time domain location of the second resource.
  • the first judgment module 33 is called to perform a corresponding operation.
  • an embodiment of the present invention also discloses a storage medium on which computer instructions are stored, and when the computer instructions are run, the method and technical solutions described in the embodiments shown in FIGS. 1 to 11 are executed.
  • the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transitory) memory.
  • the storage medium may include ROM, RAM, magnetic disk or optical disk, etc.
  • an embodiment of the present invention also discloses a terminal, including a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor executes the above diagram when the computer instructions are executed.
  • the terminal may be a User Equipment (User Equipment, UE for short) applied in an NRV2X scenario.
  • UE User Equipment

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Abstract

一种用于V2X业务的反馈资源确定方法及装置、存储介质、终端，所述方法包括：获取第一资源集合，第一资源集合包括至少一个第一资源的时域位置；对于每一第一资源，根据第一资源的时域位置以及关联反馈信息确定第一资源对应的第二资源的候选时域位置，关联反馈信息用于指示PSSCH与PSFCH的时间差；对于每一候选时域位置，判断候选时域位置所占据的符号是否包含不可用符号，不可用符号是指不可用于传输第二资源的符号；当判断结果表明候选时域位置所占据的符号不包含不可用符号时，确定候选时域位置为第二资源的时域位置。通过本发明提供的方案使得NRV2X场景中的UE能够高效地、准确地确定辅链路反馈信道的资源。

Description

用于V2X业务的反馈资源确定方法及装置、存储介质、终端
本申请要求于2019年3月28日提交中国专利局、申请号为201910243661.X、发明名称为“用于V2X业务的反馈资源确定方法及装置、存储介质、终端”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
本发明涉及通信技术领域，具体地涉及一种用于V2X业务的反馈资源确定方法及装置、存储介质、终端。
背景技术
随着第三代合作伙伴计划(3rd Generation Partnership Project，简称3GPP)的发展，新无线(New Radio，简称NR，也可称为新空口)车对外界的信息交换(vehicle to X，简称V2X，也可称为vehicle to everything)作为协议第16(Release 16，简称R16)版本的一个关键技术方向正在进行研究。NR V2X作为长期演进(Long Term Evolution，简称LTE)V2X技术的增强是使能车联网的关键技术手段。
NRV2X为满足车联网的各种业务需求，可以支持单播，组播，广播三种数据传输方式。其中，为提高单播与组播通信的可靠性，3GPP已通过讨论达成一致，在单播与组播中引入反馈机制，如混合式自动重送请求(Hybrid Automatic Repeat reQuest，简称HARQ)反馈机制。其中，HARQ反馈内容包含在辅链路反馈控制信息(Sidelink Feedback Control Information，简称SFCI)中进行传输，该信息通过辅链路物理层反馈信道(Physical Sidelink Feedback Channel，简称PSFCH，可简称为辅链路反馈信道)承载。
最新协议还进一步确定：辅链路物理层数据信道(Physical Sidelink Shared Channel，简称PSSCH，可简称为辅链路数据信道)与其相关联的辅链路反馈信道间的时间差，可以通过网络配置或预配置的方式获取。
在LTE V2X中，是通过网络配置或预配置的方式为辅链路数据信道及辅链路物理层控制信道(Physical Sidelink Control Channel，简称PSCCH，也可称为妇联记录控制信道)配置资源池的，该资源池包含多个资源。在实际应用中，用户设备(User Equipment，简称UE)可以在发送资源池的一个或多个资源上发送数据或控制信令，在接收资源池的一个或多个资源上接收数据或控制信令。
但是，由于LTE V2X并不支持反馈机制，也不存在辅链路反馈信道。因而，现有技术关于UE如何获取用于辅链路反馈信道的资源方面仍存在技术空白点，导致NRV2X场景中的UE无法从网络配置或预配置的资源池中获取用于辅链路反馈信道的资源。
发明内容
本发明解决的技术问题是如何确保NR V2X场景中的UE能够高效地、准确地确定辅链路反馈信道的资源。
为解决上述技术问题，本发明实施例提供一种用于V2X业务的反馈资源确定方法，包括：获取第一资源集合，所述第一资源集合包括至少一个第一资源的时域位置，所述第一资源为PSSCH的传输资源；对于每一第一资源，根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置，所述第二资源为PSFCH的传输资源，所述关联反馈信息用于指示PSSCH与PSFCH的时间差；对于每一候选时域位置，判断所述候选时域位置所占据的符号是否包含不可用符号，所述不可用符号是指不可用于传输第二资源的符号；当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域 位置。
可选的，所述当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置包括：当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第三资源，所述第三资源为PSSCH或PSCCH的传输资源，且所述第三资源的数据传输方向与第一资源的数据传输方向不相同；当判断结果表明所述候选时域位置所在时隙包含所述第三资源时，确定所述候选时域位置为所述第二资源的时域位置。
可选的，当所述第一资源为发送资源时，所述第三资源为接收资源；当所述第一资源为接收资源时，所述第三资源为发送资源。
可选的，所述当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置包括：当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第四资源，所述第四资源为PSSCH或PSCCH的传输资源，且所述第四资源的数据传输方向与第一资源的数据传输方向相同或不相同；当判断结果表明所述候选时域位置所在时隙包含所述第四资源时，确定所述候选时域位置为所述第二资源的时域位置。
可选的，当所述第一资源为发送资源时，所述第四资源为接收资源或发送资源；当所述第一资源为接收资源时，所述第四资源为接收资源或发送资源。
可选的，所述根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置包括：根据所述第一资源的结束位置所在时隙以及所述关联反馈信息，确定所述第二资源所在的候选时隙；根据配置或预配置的第二资源在时隙内的位置信息确定所述第二资源在所述候选时隙中的候选时域位置。
可选的，当所述第一资源为发送资源时，所述第二资源为接收资源；当所述第一资源为接收资源时，所述第二资源为发送资源。
可选的，所述第一资源集合是通过配置或预配置的方式获取的；所述关联反馈信息是通过配置或预配置的方式确定的，所述第一资源集合与关联反馈信息一一对应。
可选的，所述第一资源和第二资源为辅链路的资源并复用Uu链路的传输资源，所述不可用符号包含Uu链路的下行符号。
可选的，所述不可用符号还包含Uu链路的灵活符号。
可选的，所述反馈资源确定方法还包括：在判断所述候选时域位置所占据的符号是否包含不可用符号之前，判断UE是否处于网络覆盖范围内；当判断结果表明UE处于网络覆盖范围之外时，将每一候选时域位置均确定为所述第二资源的时域位置。
本发明实施例还提供一种用于V2X业务的反馈资源确定装置，包括：获取模块，用于获取第一资源集合，所述第一资源集合包括至少一个第一资源的时域位置，所述第一资源为PSSCH的传输资源；第一确定模块，对于每一第一资源，根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置，所述第二资源为PSFCH的传输资源，所述关联反馈信息用于指示PSSCH与PSFCH的时间差；第一判断模块，对于每一候选时域位置，判断所述候选时域位置所占据的符号是否包含不可用符号，所述不可用符号是指不可用于传输第二资源的符号；第二确定模块，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置。
本发明实施例还提供一种存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述方法的步骤。
本发明实施例还提供一种终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行 所述计算机指令时执行上述方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下有益效果：
本发明实施例提供一种用于V2X业务的反馈资源确定方法，包括：获取第一资源集合，所述第一资源集合包括至少一个第一资源的时域位置，所述第一资源为PSSCH的传输资源；对于每一第一资源，根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置，所述第二资源为PSFCH的传输资源，所述关联反馈信息用于指示PSSCH与PSFCH的时间差；对于每一候选时域位置，判断所述候选时域位置所占据的符号是否包含不可用符号，所述不可用符号是指不可用于传输第二资源的符号；当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置。较之现有技术，在NRV2X场景中采用本实施例所述方案的UE能够高效地、准确地确定辅链路反馈信道的资源，而不需要通过额外的信令配置，减少信令开销。具体而言，基于关联反馈信息确定PSSCH与PSFCH的时间差，对于每一第一资源，将所述第一资源的时域位置加上所述时间差，能够得到对应的第二资源的候选时域位置。进一步地，根据对候选时域位置所占据的符号的判别结果确定该候选时域位置是否可以作为第二资源的时域位置，以筛除候选时域位置中包含有不可用符号的候选时域位置。
进一步，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第四资源，所述第四资源为PSSCH或PSCCH的传输资源，且所述第四资源的数据传输方向与第一资源的数据传输方向相同或不相同；当判断结果表明所述候选时域位置所在时隙包含所述第四资源时，确定所述候选时域位置为所述第二资源的时域位置。由此，可以在确保Uu链路的传输资源的完整度的同时，提高资源利用率。具体而言，通过本步骤的判断操作，能够筛除掉候选时域位置中所在时隙不包含第四资源的 候选时域位置，以确保这些时隙的Uu链路的传输资源的完整度。换言之，本实施例的方案通过优先使用已经包含第四资源的时隙中的候选时域位置作为第二资源的时域位置，能够有效避免辅链路的资源所复用的Uu链路的传输资源(尤其是不包含第四资源的Uu链路的传输资源)被频繁打断。
进一步，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第三资源，所述第三资源为PSSCH或PSCCH的传输资源，且所述第三资源的数据传输方向与第一资源的数据传输方向不相同；当判断结果表明所述候选时域位置所在时隙包含所述第三资源时，确定所述候选时域位置为所述第二资源的时域位置。由此，可以在确保Uu链路的传输资源的完整度的同时，降低UE复杂度。具体而言，通过本步骤的判断操作，能够筛除掉候选时域位置中所在时隙不包含第三资源的候选时域位置，以确保这些时隙的Uu链路的传输资源的完整度。换言之，本实施例的方案通过优选使用已经包含第三资源的时隙中的候选时域位置作为第二资源的时域位置，能够有效避免辅链路的资源所复用的Uu链路的传输资源(尤其是不包含第四资源的Uu链路的传输资源)被频繁打断。进一步地，较之前述第四资源，由于第三资源的数据传输方向与第一资源的数据传输方向相反，也即，第三资源的数据传输方向与第二资源的数据传输方向是相同的。因而，本实施例的方案能够确保UE在该时隙内只需传输同向数据，无需在单个时隙内频繁进行收发切换操作，使得降低UE复杂度成为可能。
附图说明
图1是本发明实施例的一种用于V2X业务的反馈资源确定方法的流程图；
图2是图1中步骤S102的一个具体实施方式的流程图；
图3是本发明实施例的一个典型的应用场景的通信示意图；
图4是将图1所示方法应用于图3所示场景的一种反馈资源的确定过程示意图；
图5是将图1所示方法应用于图3所示场景的另一种反馈资源的确定过程示意图；
图6是图1所示反馈资源确定方法的一个变化例的流程图；
图7是将图6所示方法应用于图3所示场景的一种反馈资源的确定过程示意图；
图8是将图6所示方法应用于图3所示场景的另一种反馈资源的确定过程示意图；
图9是图1所示反馈资源确定方法的另一个变化例的流程图；
图10是将图9所示方法应用于图3所示场景的一种反馈资源的确定过程示意图；
图11是将图9所示方法应用于图3所示场景的另一种反馈资源的确定过程示意图；
图12是本发明实施例的一种用于V2X业务的反馈资源确定装置的结构示意图。
具体实施方式
如背景技术所言，现有NR V2X场景中的辅链路反馈机制尚不完善，使得NR V2X场景中的UE无法从网络配置或预配置的资源池中确定用于辅链路反馈信道的资源。
为解决上述技术问题，本发明实施例提供一种用于V2X业务的反馈资源确定方法，包括：获取第一资源集合，所述第一资源集合包括至少一个第一资源的时域位置，所述第一资源为PSSCH的传输资源；对于每一第一资源，根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置，所述第二资 源为PSFCH的传输资源，所述关联反馈信息用于指示PSSCH与PSFCH的时间差；对于每一候选时域位置，判断所述候选时域位置所占据的符号是否包含不可用符号，所述不可用符号是指不可用于传输第二资源的符号；当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置。
在NRV2X场景中采用本实施例所述方案的UE能够高效地、准确地确定辅链路反馈信道的资源，而不需要通过额外的信令配置，减少信令开销。
具体而言，基于关联反馈信息确定PSSCH与PSFCH的时间差，对于每一第一资源，将所述第一资源的时域位置加上所述时间差，能够得到对应的第二资源的候选时域位置。
进一步地，根据对候选时域位置所占据的符号的判别结果确定该候选时域位置是否可以作为第二资源的时域位置，以筛除候选时域位置中包含有不可用符号的候选时域位置。
为使本发明的上述目的、特征和有益效果能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
图1是本发明实施例的一种用于V2X业务的反馈资源确定方法的流程图。本实施例的方案可以应用于车联网场景，如应用于NR V2X场景。本实施例的方案可以由用户设备侧执行，如由作为发送端和/或接收端的UE执行，所述UE可以使用通过本实施例的方案确定的反馈资源以单播或组播的方式进行HARQ反馈。
具体地，参考图1，本实施例所述反馈资源确定方法可以包括如下步骤：
步骤S101，获取第一资源集合，所述第一资源集合包括至少一个第一资源的时域位置，所述第一资源为PSSCH的传输资源；
步骤S102，对于每一第一资源，根据所述第一资源的时域位置 以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置，所述第二资源为PSFCH的传输资源，所述关联反馈信息用于指示PSSCH与PSFCH的时间差；
步骤S103，对于每一候选时域位置，判断所述候选时域位置所占据的符号是否包含不可用符号，所述不可用符号是指不可用于传输第二资源的符号；
当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，所述反馈资源确定方法还可以包括步骤S104，确定所述候选时域位置为所述第二资源的时域位置。
否则，当判断结果表明所述候选时域位置所占据的符号包含不可用符号时，所述反馈资源确定方法还可以包括步骤S105，确定所述候选时域位置不是所述第二资源的时域位置。
更为具体地，所述第一资源和第二资源均为辅链路的资源，所述辅链路的资源复用的是基站分配给UE的用于通过Uu接口进行数据传输的资源(可称为Uu链路的传输资源)。
例如，基站可以通过配置或预配置的方式为UE分配资源池，所述资源池可以由Uu链路和辅链路共用。其中，所述资源池可以包括发送资源池和接收资源池。
进一步地，所述第一资源集合可以是通过配置或预配置的方式获取的。通过所述第一资源集合，可以指示所述第一资源集合包括的各第一资源在所述资源池中的具体时域位置。
例如，所述通过配置的方式确定是指：通过基站预先发送的下行信令(如RRC信令)来指示。
又例如，所述通过预配置的方式确定是指：在UE关联的用户身份识别卡(Subscriber Identification Module，简称SIM卡)中预置。
进一步地，所述不可用符号可以指：不可被辅链路复用的Uu链 路的传输资源所占据的符号。
例如，所述不可用符号可以包含Uu链路的下行符号。相应的，在所述步骤S103中，当所述候选时域位置所占据的符号均为Uu链路的非下行符号时，可以确定所述候选时域位置为所述第二资源的时域位置。其中，所述非下行符号可以包括上行(Uplink)符号以及灵活(Flexible)符号。所述灵活符号是指：在该符号上的数据传输方向可以根据配置或基站动态指示的方式调整。
又例如，所述不可用符号可以包含Uu链路的下行(Downlink)符号以及灵活符号。相应的，在所述步骤S103中，当所述候选时域位置所占据的符号均为Uu链路的上行符号时，可以确定所述候选时域位置为所述第二资源的时域位置。
进一步地，所述上行符号及非下行符号对应于NR Uu链路的半静态上下行时隙结构配置，包括基于小区的半静态上下行时隙结构配置(Cell-specific semi-static DL/UL assignment)，以及基于UE的半静态上下行时隙结构配置(UE-specific semi-static DL/UL assignment)。
进一步地，根据现有协议的规定，在本实施例所述Uu链路和辅链路共用资源的场景中，辅链路不会复用Uu链路的下行符号。因而，所述不可用符号还可以是指不可用于传输第一资源的符号。
在一个实施例中，所述关联反馈信息可以包含配置或预配置的PSSCH与PSFCH之间的时间差信息。例如，当所述关联反馈信息的比特值为非零数值时，该比特值即为所述PSSCH与PSFCH间的时间差。又例如，当所述关联反馈信息的比特值为零时，表明基站没有为UE配置对应的反馈资源。
在一个变化例中，所述关联反馈信息可以包含是否具有对应的反馈资源的指示信息，以及，当指示信息指示的是具有对应的反馈资源时，所述PSSCH与PSFCH间的时间差。例如，所述关联反馈信息可以为3比特大小，其中第一个比特位用于指示是否具有对应的反馈资 源，假设0表示否、1表示是。进一步地，当第一个比特位的数值为1时，后面的两个比特用于指示PSSCH与PSFCH间的时间差。假设00表示时间差为1个时隙、01表示时间差为2个时隙、10表示时间差为3个时隙、11表示时间差为4个时隙。
在实际应用中，本领域技术人员可以根据需要调整所述关联反馈信息包含的比特位数，以及各比特位的含义。
进一步地，所述关联反馈信息可以是通过配置或预配置的方式确定的。
进一步地，所述第一资源集合与关联反馈信息可以是一一对应的。具体地，针对不同的第一资源集合，可以配置或预配置不同的关联反馈信息。例如，第一资源集合1对应的关联反馈信息中包含的时间差可以为1个时隙，第一资源集合2对应的关联反馈信息中包含的时间差可以为2个时隙。
在一个实施例中，当所述第一资源为发送资源时，所述第二资源可以为接收资源。例如，所述第一资源集合可以为PSSCH发送资源集合，所述第二资源可以为PSFCH接收资源。
在一个变化例中，当所述第一资源为接收资源时，所述第二资源可以为发送资源。例如，所述第一资源集合可以为PSSCH接收资源集合，所述第二资源可以为PSCCH发送资源。
在一个实施例中，参考图2，所述步骤S102可以包括如下步骤：
步骤S1021，根据所述第一资源的结束位置所在时隙以及所述关联反馈信息，确定所述第二资源所在的候选时隙；
步骤S1022，根据配置或预配置的第二资源在时隙内的位置信息确定所述第二资源在所述候选时隙中的候选时域位置。
具体地，所述第一资源的结束位置可以指：所述第一资源所占据的最后一个符号在时隙上的位置。
更为具体地，所述关联反馈信息中指示的PSSCH和PSFCH之间的时间差可以是时隙差。
进一步地，在所述步骤S1021中，可以确定所述第一资源所占据的最后一个符号所处的时隙，并将该时隙加上所述关联反馈信息指示的时隙差，以得到所述候选时隙。
进一步地，在所述步骤S1022中，假设所述第一资源的最后一个符号位于时隙5，所述时隙差为3个时隙，通过配置或预配置的方式指示的第二资源位于时隙内的符号12至符号13，则可以确定所述第二资源位于时隙8的符号12至符号13。
在一个典型的应用场景中，参考图3，UE61与UE62进行单播通信，UE61向UE62发送单播数据，UE62收到UE61发送的单播数据后，根据译码结果发送HARQ反馈信息。其中，所述单播数据由PSSCH承载，所述HARQ反馈信息由PSFCH承载。
进一步地，UE61与UE62之间的单播数据通信和HARQ反馈通信均使用辅链路的资源进行传输。所述辅链路的资源共用Uu链路的传输资源。因而，为确定可用于PSFCH的传输资源，UE62和UE61需要确定基站63分配的对应于所述PSSCH传输的反馈资源。其中，基站63用于维持小区1的网络通信。
接下来以第一资源集合为PSSCH接收资源集合，第二资源为PSFCH发送资源为例对本实施例的具体过程进行详细阐述。
图4示例性地展示了基站63分配的Uu链路的传输资源在20毫秒(ms)时隙内的时域位置。其中，所述Uu链路的传输资源以10ms为周期在时域上重复。
如图4所示，以系统帧n为例，假设一个10ms周期内Uu链路的时隙结构为DDXUUDXXXU，其中，每一字母表示一个时隙的方向：D表示下行，X表示灵活，U表示上行。例如，时隙0的方向为D，表示时隙0的数据传输方向为下行，该时隙的符号均为下行符号； 时隙2的方向为X，表示时隙2的数据传输方向为灵活，该时隙的符号均为灵活符号；时隙3的方向为U，表示时隙3的数据传输方向为上行，该时隙的符号均为上行符号。
根据现有协议的规定，辅链路的资源(包括第一资源和第二资源)均不能复用Uu链路的下行符号，具体至图4所示示例中，UE61和UE62进行单播通信期间，均不能使用时隙0、时隙1和时隙5进行数据传输和HARQ反馈。
继续参考图4，假设UE62通过基站配置获知其PSSCH接收资源集合在10ms内的时域位置为时隙2、时隙4、时隙6至时隙8。并且，每一PSSCH接收资源仅占用对应的时隙的符号3至符号11。
进一步地，基站配置所述PSSCH接收资源集合具有关联的反馈资源，且所述关联反馈信息指示所述PSSCH与PSFCH间的时间差为2个时隙。
因此，当UE62在配置的PSSCH接收资源集合接收数据，且需要反馈时，对应于图1和图2所示反馈资源确定方法，UE62可以将PSSCH接收资源集合中的每一接收资源的结束位置所在时隙加上所述时间差，以获得候选时隙。具体至图4所示示例中，将时隙2加上2个时隙的时间差，可以得到时隙4；将时隙4加上2个时隙的时间差，可以得到时隙6；将时隙6加上2个时隙的时间差，可以得到时隙8；将时隙7加上2个时隙的时间差，可以得到时隙9；将时隙8加上2个时隙的时间差，可以得到下一系统帧(即系统帧n+1)的时隙0。
进一步地，可以通过配置或预配置的方式确定PSFCH发送资源集合中的PSFCH发送资源位于时隙的符号11至符号12。
因而，可以确定系统帧n的时隙4的符号11至符号12、系统帧n的时隙6的符号11至符号12、系统帧n的时隙8的符号11至符号12、系统帧n的时隙9的符号11至符号12、系统帧n+1的时隙0的 符号11至符号12为本示例中PSFCH发送资源的候选时域位置。这几个时隙位置可以组成本示例中的PSFCH候选发送资源集合。
当所述不可用符号包含Uu链路的下行符号时：
由于系统帧n的时隙4、时隙9对应于Uu链路的上行而非下行，因而，所述时隙4、时隙9的符号11至符号12可以作为PSFCH发送资源集合的时隙位置。
由于系统帧n的时隙6、时隙8对应于Uu链路的灵活而非下行，因而，所述时隙6、时隙8的符号11至符号12可以作为PSFCH发送资源集合的时隙位置。
由于系统帧n+1的时隙0对应于Uu链路的下行，因而，所述时隙0的符号11至符号12不能作为PSFCH发送资源集合的一个时隙位置。
由此，在图4所示示例中，最终确定的PSFCH发送资源集合包括时隙4、时隙6、时隙8和时隙9的符号11至符号12。而PSFCH候选发送资源集合中的时隙0的符号11至符号12则被舍弃。
而当所述不可用符号包含Uu链路的下行符号和灵活符号时：
参考前述分析，由于只有时隙4和时隙9对应于Uu链路的上行而非下行或灵活，因而，最终确定的PSFCH发送资源集合仅包括时隙4和时隙9的符号11至符号12。而PSFCH候选发送资源集合中的时隙6、时隙8和时隙0的符号11至符号12则被舍弃。
接下来以第一资源集合为PSSCH发送资源集合，第二资源为PSFCH接收资源为例对本实施例的具体过程进行详细阐述。
图5示例性地展示了基站63分配的Uu链路的传输资源在20毫秒(ms)时隙内的时域位置。其中，所述Uu链路的传输资源以10ms为周期在时域上重复。
如图5所示，以系统帧n为例，假设一个10ms周期内Uu链路 的时隙结构为DDXUUDXXXU，其中，每一字母表示一个时隙的方向：D表示下行，X表示灵活，U表示上行。例如，时隙0的方向为D，表示时隙0的数据传输方向为下行，该时隙的符号均为下行符号；时隙2的方向为X，表示时隙2的数据传输方向为灵活，该时隙的符号均为灵活符号；时隙3的方向为U，表示时隙3的数据传输方向为上行，该时隙的符号均为上行符号。
根据现有协议的规定，辅链路的资源(包括第一资源和第二资源)均不能复用Uu链路的下行符号，具体至图5所示示例中，UE61和UE62进行单播通信期间，均不能使用时隙0、时隙1和时隙5进行数据传输和HARQ反馈。
继续参考图5，假设UE61通过基站配置获知其PSSCH发送资源集合在10ms内的时域位置为时隙2、时隙4、时隙6至时隙8。并且，每一PSSCH发送资源仅占用对应的时隙的符号3至符号11。
进一步地，基站配置所述PSSCH发送资源集合具有关联的反馈资源，且所述关联反馈信息指示所述PSSCH与PSFCH间的时间差为2个时隙。
因此，当UE61在配置的PSSCH发送资源集合发送数据，且需要接收反馈时，对应于图1和图2所示反馈资源确定方法，UE61可以将PSSCH发送资源集合中的每一发送资源的结束位置所在时隙加上所述时间差，以获得候选时隙。具体至图5所示示例中，将时隙2加上2个时隙的时间差，可以得到时隙4；将时隙4加上2个时隙的时间差，可以得到时隙6；将时隙6加上2个时隙的时间差，可以得到时隙8；将时隙7加上2个时隙的时间差，可以得到时隙9；将时隙8加上2个时隙的时间差，可以得到下一系统帧(即系统帧n+1)的时隙0。
进一步地，可以通过配置或预配置的方式确定PSFCH接收资源集合中的PSFCH接收资源位于时隙的符号11至符号12。
因而，可以确定系统帧n的时隙4的符号11至符号12、系统帧n的时隙6的符号11至符号12、系统帧n的时隙8的符号11至符号12、系统帧n的时隙9的符号11至符号12、系统帧n+1的时隙0的符号11至符号12为本示例中PSFCH接收资源的候选时域位置。这几个时隙位置可以组成本示例中的PSFCH候选接收资源集合。
当所述不可用符号包含Uu链路的下行符号时：
由于系统帧n的时隙4、时隙9对应于Uu链路的上行而非下行，因而，所述时隙4、时隙9的符号11至符号12可以作为PSFCH接收资源集合的时隙位置。
由于系统帧n的时隙6、时隙8对应于Uu链路的灵活而非下行，因而，所述时隙6、时隙8的符号11至符号12可以作为PSFCH接收资源集合的时隙位置。
由于系统帧n+1的时隙0对应于Uu链路的下行，因而，所述时隙0的符号11至符号12不能作为PSFCH接收资源集合的一个时隙位置。
由此，在图5所示示例中，最终确定的PSFCH接收资源集合包括时隙4、时隙6、时隙8和时隙9的符号11至符号12。而PSFCH候选接收资源集合中的时隙0的符号11至符号12则被舍弃。
而当所述不可用符号包含Uu链路的下行符号和灵活符号时：
参考前述分析，由于只有时隙4和时隙9对应于Uu链路的上行而非下行或灵活，因而，最终确定的PSFCH接收资源集合仅包括时隙4和时隙9的符号11至符号12。而PSFCH候选接收资源集合中的时隙6、时隙8和时隙0的符号11至符号12则被舍弃。
由上，采用本实施例的方案，NR V2X UE能够高效地、准确地确定辅链路反馈信道的资源，而不需要通过额外的信令配置，减少信令开销。具体而言，基于关联反馈信息确定PSSCH与PSFCH的时间差，对于每一第一资源，将所述第一资源的时域位置加上所述时间差， 能够得到对应的第二资源的候选时域位置。进一步地，根据对候选时域位置所占据的符号的判别结果确定该候选时域位置是否可以作为第二资源的时域位置，以筛除候选时域位置中包含有不可用符号的候选时域位置。
在本实施例的一个变化例中，参考图6，当所述步骤S103的判断结果为否定的时，在执行步骤S104之前，本实施例所述反馈资源确定方法还可以包括如下步骤：
步骤S106，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第三资源，所述第三资源为PSSCH或PSCCH的传输资源，且所述第三资源的数据传输方向与第一资源的数据传输方向不相同；
当步骤S106的判断结果表明所述候选时域位置所在时隙包含所述第三资源时，执行所述步骤S104，确定所述候选时域位置为所述第二资源的时域位置；
否则，当步骤S106的判断结果表明所述候选时域位置所在时隙不包含所述第三资源时，执行所述步骤S105，确定所述候选时域位置不是所述第二资源的时域位置。
由此，可以在确保Uu链路的传输资源的完整度的同时，降低UE复杂度。具体而言，通过本步骤的判断操作，能够筛除掉候选时域位置中所在时隙不包含第三资源的候选时域位置，以确保这些时隙的Uu链路的传输资源的完整度。换言之，本实施例的方案通过优选使用已经包含第三资源的时隙中的候选时域位置作为第二资源的时域位置，能够有效避免辅链路的资源所复用的Uu链路的传输资源(尤其是不包含第四资源的Uu链路的传输资源)被频繁打断。进一步地，较之第四资源，由于第三资源的数据传输方向与第一资源的数据传输方向相反，也即，第三资源的数据传输方向与第二资源的数据传输方向是相同的。因而，本实施例的方案能够确保UE在该时隙内只需传输同向数据，无需在单个时隙内频繁进行收发切换操作，使得降低 UE复杂度成为可能。
具体地，所述第三资源同样可以是辅链路的资源。
更为具体地，所述第三资源可以是通过配置或预配置的方式获取的。例如，通过配置或预配置第三资源集合，可以指示所述第三资源集合包括的各第三资源在所述资源池中的具体时域位置。
在一个实施例中，当所述第一资源为发送资源时，所述第二资源可以为接收资源，所述第三资源可以为接收资源。例如，所述第一资源集合可以为PSSCH发送资源集合，所述第二资源可以为PSFCH接收资源，所述第三资源可以为PSSCH接收资源或PSCCH接收资源。
在一个变化例中，当所述第一资源为接收资源时，所述第二资源可以为发送资源，所述第三资源可以为发送资源。例如，所述第一资源集合可以为PSSCH接收资源集合，所述第二资源可以为PSFCH发送资源，所述第三资源可以为PSSCH发送资源或PSCCH发送资源。
接下来以第一资源集合为PSSCH接收资源集合、第二资源为PSFCH发送资源，第三资源为PSSCH发送资源集合中的传输资源为例对本实施例的具体过程进行详细阐述。
图7示例性地展示了基站63分配的Uu链路的传输资源在20毫秒(ms)时隙内的时域位置。其中，所述Uu链路的传输资源以10ms为周期在时域上重复。
如图7所示，以系统帧n为例，假设一个10ms周期内Uu链路的时隙结构为DDXUUDXXXU，其中，每一字母表示一个时隙的方向：D表示下行，X表示灵活，U表示上行。例如，时隙0的方向为D，表示时隙0的数据传输方向为下行，该时隙的符号均为下行符号；时隙2的方向为X，表示时隙2的数据传输方向为灵活，该时隙的符号均为灵活符号；时隙3的方向为U，表示时隙3的数据传输方向为上行，该时隙的符号均为上行符号。
根据现有协议的规定，辅链路的资源(包括第一资源和第二资源) 均不能复用Uu链路的下行符号，具体至图7所示示例中，UE61和UE62进行单播通信期间，均不能使用时隙0、时隙1和时隙5进行数据传输和HARQ反馈。
继续参考图7，假设UE62通过基站配置获知其PSSCH接收资源集合在10ms内的时域位置为时隙2、时隙4、时隙6至时隙8。并且，每一PSSCH接收资源仅占用对应的时隙的符号3至符号11。
进一步地，基站配置所述PSSCH接收资源集合具有关联的反馈资源，且所述关联反馈信息指示所述PSSCH与PSFCH间的时间差为2个时隙。
因此，当UE62在配置的PSSCH接收资源集合接收到发给其的数据，且需要反馈时，对应于图1和图2所示反馈资源确定方法，UE62可以将PSSCH接收资源集合中的每一接收资源的结束位置所在时隙加上所述时间差，以获得候选时隙。具体至图7所示示例中，将时隙2加上2个时隙的时间差，可以得到时隙4；将时隙4加上2个时隙的时间差，可以得到时隙6；将时隙6加上2个时隙的时间差，可以得到时隙8；将时隙7加上2个时隙的时间差，可以得到时隙9；将时隙8加上2个时隙的时间差，可以得到下一系统帧(即系统帧n+1)的时隙0。
进一步地，可以通过配置或预配置的方式确定PSFCH发送资源集合中的PSFCH发送资源位于时隙的符号11至符号12。
因而，可以确定系统帧n的时隙4的符号11至符号12、系统帧n的时隙6的符号11至符号12、系统帧n的时隙8的符号11至符号12、系统帧n的时隙9的符号11至符号12、系统帧n+1的时隙0的符号11至符号12为本示例中PSFCH发送资源的候选时域位置。这几个时隙位置可以组成本示例中的PSFCH候选发送资源集合。
当所述不可用符号包含Uu链路的下行符号时：
由于系统帧n+1的时隙0对应于Uu链路的下行，因而，所述时 隙0的符号11至符号12不能作为PSFCH发送资源集合的一个时隙位置。
可以通过配置或预配置的方式确定UE62的PSSCH发送资源集合中每一PSSCH发送资源的时域位置。具体至图7所示示例，假设PSSCH发送资源集合中包含的PSSCH发送资源的时域位置，与PSSCH接收资源集合中包含的PSSCH接收资源的时域位置相一致。
进一步地，通过执行上述图6所示步骤，能够基于PSSCH发送资源集合进一步筛除PSFCH候选发送资源集合中不符合要求的PSFCH候选发送资源。
由于时隙4、时隙6和时隙8包含PSSCH发送资源，因而，时隙4、时隙6和时隙8的符号11至符号12能够作为PSFCH发送资源集合的时隙位置。
由于时隙9不包含PSSCH发送资源，因而，时隙9的符号11至符号12不能作为PSFCH发送资源集合的一个时隙位置。
由此，在图7所示示例中，最终确定的PSFCH发送资源集合包括时隙4、时隙6和时隙8的符号11至符号12。而PSFCH候选发送资源集合中的时隙9、时隙0的符号11至符号12则被舍弃。
而当所述不可用符号包含Uu链路的下行符号和灵活符号时：
参考前述分析，由于只有时隙4和时隙9对应于Uu链路的上行而非下行或灵活，而在时隙4和时隙9中，只有时隙4包含有PSSCH发送资源，因而，最终确定的PSFCH发送资源集合仅包括时隙4的符号11至符号12。而PSFCH候选发送资源集合中的时隙6、时隙8、时隙9和时隙0的符号11至符号12则被舍弃。
需要注意的是，图7是以PSSCH发送资源集合为例进行具体阐述的，而在实际应用中，本领域技术人员也可以以PSCCH发送资源集合为筛选标准确定合适的PSFCH发送资源集合。
接下来以第一资源集合为PSSCH发送资源集合、第二资源为PSFCH接收资源，第三资源为PSSCH接收资源集合中的传输资源为例对本实施例的具体过程进行详细阐述。
图8示例性地展示了基站63分配的Uu链路的传输资源在20毫秒(ms)时隙内的时域位置。其中，所述Uu链路的传输资源以10ms为周期在时域上重复。
如图8所示，以系统帧n为例，假设一个10ms周期内Uu链路的时隙结构为DDXUUDXXXU，其中，每一字母表示一个时隙的方向：D表示下行，X表示灵活，U表示上行。例如，时隙0的方向为D，表示时隙0的数据传输方向为下行，该时隙的符号均为下行符号；时隙2的方向为X，表示时隙2的数据传输方向为灵活，该时隙的符号均为灵活符号；时隙3的方向为U，表示时隙3的数据传输方向为上行，该时隙的符号均为上行符号。
根据现有协议的规定，辅链路的资源(包括第一资源和第二资源)均不能复用Uu链路的下行符号，具体至图8所示示例中，UE61和UE62进行单播通信期间，均不能使用时隙0、时隙1和时隙5进行数据传输和HARQ反馈。
继续参考图8，假设UE61通过基站配置获知其PSSCH发送资源集合在10ms内的时域位置为时隙2、时隙4、时隙6至时隙8。并且，每一PSSCH发送资源仅占用对应的时隙的符号3至符号11。
进一步地，基站配置所述PSSCH发送资源集合具有关联的反馈资源，且所述关联反馈信息指示所述PSSCH与PSFCH间的时间差为2个时隙。
因此，当UE61在配置的PSSCH发送资源集合发送数据，且需要接收反馈时，对应于图1和图2所示反馈资源确定方法，UE61可以将PSSCH发送资源集合中的每一发送资源的结束位置所在时隙加上所述时间差，以获得候选时隙。具体至图8所示示例中，将时隙2 加上2个时隙的时间差，可以得到时隙4；将时隙4加上2个时隙的时间差，可以得到时隙6；将时隙6加上2个时隙的时间差，可以得到时隙8；将时隙7加上2个时隙的时间差，可以得到时隙9；将时隙8加上2个时隙的时间差，可以得到下一系统帧(即系统帧n+1)的时隙0。
进一步地，可以通过配置或预配置的方式确定PSFCH接收资源集合中的PSFCH接收资源位于时隙的符号11至符号12。
因而，可以确定系统帧n的时隙4的符号11至符号12、系统帧n的时隙6的符号11至符号12、系统帧n的时隙8的符号11至符号12、系统帧n的时隙9的符号11至符号12、系统帧n+1的时隙0的符号11至符号12为本示例中PSFCH接收资源的候选时域位置。这几个时隙位置可以组成本示例中的PSFCH候选接收资源集合。
当所述不可用符号包含Uu链路的下行符号时：
由于系统帧n+1的时隙0对应于Uu链路的下行，因而，所述时隙0的符号11至符号12不能作为PSFCH接收资源集合的一个时隙位置。
可以通过配置或预配置的方式确定UE61的PSSCH接收资源集合中每一PSSCH接收资源的时域位置。具体至图8所示示例，假设PSSCH接收资源集合中包含的PSSCH接收资源的时域位置，与PSSCH发送资源集合中包含的PSSCH发送资源的时域位置相一致。
进一步地，通过执行上述图6所示步骤，能够基于PSSCH接收资源集合进一步筛除PSFCH候选接收资源集合中不符合要求的PSFCH候选接收资源。
由于时隙4、时隙6和时隙8包含PSSCH接收资源，因而，时隙4、时隙6和时隙8的符号11至符号12能够作为PSFCH接收资源集合的时隙位置。
由于时隙9不包含PSSCH接收资源，因而，时隙9的符号11至 符号12不能作为PSFCH接收资源集合的一个时隙位置。
由此，在图8所示示例中，最终确定的PSFCH接收资源集合包括时隙4、时隙6和时隙8的符号11至符号12。而PSFCH候选接收资源集合中的时隙9、时隙0的符号11至符号12则被舍弃。
而当所述不可用符号包含Uu链路的下行符号和灵活符号时：
参考前述分析，由于只有时隙4和时隙9对应于Uu链路的上行而非下行或灵活，而在时隙4和时隙9中，只有时隙4包含有PSSCH接收资源，因而，最终确定的PSFCH接收资源集合仅包括时隙4的符号11至符号12。而PSFCH候选接收资源集合中的时隙6、时隙8、时隙9和时隙0的符号11至符号12则被舍弃。
需要注意的是，图8是以PSSCH接收资源集合为例进行具体阐述的，而在实际应用中，本领域技术人员也可以以PSCCH接收资源集合为筛选标准确定合适的PSFCH接收资源集合。
在本实施例的另一个变化例中，参考图9，当所述步骤S103的判断结果为否定的时，在执行所述步骤S104之前，本实施例所述反馈资源确定方法还可以包括如下步骤：
步骤S107，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第四资源，所述第四资源为PSSCH或PSCCH的传输资源，且所述第四资源的数据传输方向与第一资源的数据传输方向相同或不相同；
当步骤S107的判断结果表明所述候选时域位置所在时隙包含所述第四资源时，执行所述步骤S104，确定所述候选时域位置为所述第二资源的时域位置。
否则，当步骤S107的判断结果表明所述候选时域位置所在时隙不包含所述第三资源时，执行所述步骤S105，确定所述候选时域位置不是所述第二资源的时域位置。
由此，可以在确保Uu链路的传输资源的完整度的同时，提高资源利用率。具体而言，通过本步骤的判断操作，能够筛除掉候选时域位置中所在时隙不包含第四资源的候选时域位置，以确保这些时隙的Uu链路的传输资源的完整度。换言之，本实施例的方案通过优先使用已经包含第四资源的时隙中的候选时域位置作为第二资源的时域位置，能够有效避免辅链路的资源所复用的Uu链路的传输资源(尤其是不包含第四资源的Uu链路的传输资源)被频繁打断。
具体地，所述第四资源同样可以是辅链路的资源。
更为具体地，所述第四资源可以是通过配置或预配置的方式获取的。例如，通过配置或预配置第四资源集合，可以指示所述第四资源集合包括的各第四资源在所述资源池中的具体时域位置。
在一个实施例中，当所述第一资源为发送资源时，所述第二资源可以为接收资源，所述第四资源可以为接收资源或发送资源。例如，所述第一资源集合可以为PSSCH发送资源集合，所述第二资源可以为PSFCH接收资源，所述第四资源可以为PSSCH接收资源、PSCCH接收资源、PSSCH发送资源或PSCCH发送资源。
在一个变化例中，当所述第一资源为接收资源时，所述第二资源可以为发送资源，所述第四资源可以为接收资源或发送资源。例如，所述第一资源集合可以为PSSCH接收资源集合，所述第二资源可以为PSFCH发送资源，所述第四资源可以为PSSCH接收资源、PSCCH接收资源、PSSCH发送资源或PSCCH发送资源。
接下来以第一资源集合为PSSCH接收资源集合、第二资源为PSFCH发送资源，第四资源为PSSCH发送资源集合或PSSCH接收资源集合中的传输资源为例对本实施例的具体过程进行详细阐述。
图10示例性地展示了基站63分配的Uu链路的传输资源在20毫秒(ms)时隙内的时域位置。其中，所述Uu链路的传输资源以10ms为周期在时域上重复。
如图10所示，以系统帧n为例，假设一个10ms周期内Uu链路的时隙结构为DDXUUDXXXU，其中，每一字母表示一个时隙的方向：D表示下行，X表示灵活，U表示上行。例如，时隙0的方向为D，表示时隙0的数据传输方向为下行，该时隙的符号均为下行符号；时隙2的方向为X，表示时隙2的数据传输方向为灵活，该时隙的符号均为灵活符号；时隙3的方向为U，表示时隙3的数据传输方向为上行，该时隙的符号均为上行符号。
根据现有协议的规定，辅链路的资源(包括第一资源和第二资源)均不能复用Uu链路的下行符号，具体至图10所示示例中，UE61和UE62进行单播通信期间，均不能使用时隙0、时隙1和时隙5进行数据传输和HARQ反馈。
继续参考图10，假设UE62通过基站配置获知其PSSCH接收资源集合在10ms内的时域位置为时隙2、时隙4、时隙6至时隙8。并且，每一PSSCH接收资源仅占用对应的时隙的符号3至符号11。
进一步地，基站配置所述PSSCH接收资源集合具有关联的反馈资源，且所述关联反馈信息指示所述PSSCH与PSFCH间的时间差为2个时隙。
因此，当UE62在配置的PSSCH接收资源集合接收到发给其的数据，且需要反馈时，对应于图1和图2所示反馈资源确定方法，UE62可以将PSSCH接收资源集合中的每一接收资源的结束位置所在时隙加上所述时间差，以获得候选时隙。具体至图10所示示例中，将时隙2加上2个时隙的时间差，可以得到时隙4；将时隙4加上2个时隙的时间差，可以得到时隙6；将时隙6加上2个时隙的时间差，可以得到时隙8；将时隙7加上2个时隙的时间差，可以得到时隙9；将时隙8加上2个时隙的时间差，可以得到下一系统帧(即系统帧n+1)的时隙0。
进一步地，可以通过配置或预配置的方式确定PSFCH发送资源集合中的PSFCH发送资源位于时隙的符号11至符号12。
因而，可以确定系统帧n的时隙4的符号11至符号12、系统帧n的时隙6的符号11至符号12、系统帧n的时隙8的符号11至符号12、系统帧n的时隙9的符号11至符号12、系统帧n+1的时隙0的符号11至符号12为本示例中PSFCH发送资源的候选时域位置。这几个时隙位置可以组成本示例中的PSFCH候选发送资源集合。
当所述不可用符号包含Uu链路的下行符号时：
由于系统帧n+1的时隙0对应于Uu链路的下行，因而，所述时隙0的符号11至符号12不能作为PSFCH发送资源集合的一个时隙位置。
可以通过配置或预配置的方式确定UE62的PSSCH发送资源集合中每一PSSCH发送资源的时域位置。具体至图10所示示例，假设PSSCH发送资源集合中包含的PSSCH发送资源在10ms周期内位于时隙2、时隙4、时隙6和时隙7。
进一步地，通过执行上述图9所示步骤，能够基于PSSCH发送资源集合以及PSSCH接收资源集合进一步从时隙4、时隙6、时隙8和时隙9的符号11至符号12中筛除不符合要求的PSFCH候选发送资源。
由于时隙4和时隙6即包含PSSCH接收资源又包含PSSCH发送资源，因而，时隙4和时隙6的符号11至符号12能够作为PSFCH发送资源集合的时隙位置。
由于时隙8包含PSSCH接收资源，因而时隙8的符号11至符号12也能作为PSFCH发送资源集合中的时隙位置。
由于时隙9即不包含PSSCH发送资源又不包含PSSCH接收资源，因而，时隙9的符号11至符号12不能作为PSFCH发送资源集合的一个时隙位置。
由此，在图10所示示例中，最终确定的PSFCH发送资源集合包括时隙4、时隙6和时隙8的符号11至符号12。而PSFCH候选发送 资源集合中的时隙9、时隙0的符号11至符号12则被舍弃。
而当所述不可用符号包含Uu链路的下行符号和灵活符号时：
参考前述分析，由于只有时隙4和时隙9对应于Uu链路的上行而非下行或灵活，而在时隙4和时隙9中，只有时隙4包含有PSSCH发送资源和PSSCH接收资源中的至少一个，因而，最终确定的PSFCH发送资源集合仅包括时隙4的符号11至符号12。而PSFCH候选发送资源集合中的时隙6、时隙8、时隙9和时隙0的符号11至符号12则被舍弃。
需要注意的是，图10是以PSSCH发送资源集合和PSSCH接收资源集合为例进行具体阐述的，而在实际应用中，本领域技术人员也可以以PSCCH发送资源集合和PSCCH接收资源集合为筛选标准确定合适的PSFCH发送资源集合。
接下来以第一资源集合为PSSCH发送资源集合、第二资源为PSFCH接收资源，第四资源为PSSCH接收资源集合或PSSCH发送资源集合中的传输资源为例对本实施例的具体过程进行详细阐述。
图11示例性地展示了基站63分配的Uu链路的传输资源在20毫秒(ms)时隙内的时域位置。其中，所述Uu链路的传输资源以10ms为周期在时域上重复。
如图11所示，以系统帧n为例，假设一个10ms周期内Uu链路的时隙结构为DDXUUDXXXU，其中，每一字母表示一个时隙的方向：D表示下行，X表示灵活，U表示上行。例如，时隙0的方向为D，表示时隙0的数据传输方向为下行，该时隙的符号均为下行符号；时隙2的方向为X，表示时隙2的数据传输方向为灵活，该时隙的符号均为灵活符号；时隙3的方向为U，表示时隙3的数据传输方向为上行，该时隙的符号均为上行符号。
根据现有协议的规定，辅链路的资源(包括第一资源和第二资源)均不能复用Uu链路的下行符号，具体至图11所示示例中，UE61和 UE62进行单播通信期间，均不能使用时隙0、时隙1和时隙5进行数据传输和HARQ反馈。
继续参考图11，假设UE61通过基站配置获知其PSSCH发送资源集合在10ms内的时域位置为时隙2、时隙4、时隙6至时隙8。并且，每一PSSCH发送资源仅占用对应的时隙的符号3至符号11。
进一步地，基站配置所述PSSCH发送资源集合具有关联的反馈资源，且所述关联反馈信息指示所述PSSCH与PSFCH间的时间差为2个时隙。
因此，当UE61在配置的PSSCH发送资源集合发送数据，且需要接收反馈时，对应于图1和图2所示反馈资源确定方法，UE61可以将PSSCH发送资源集合中的每一发送资源的结束位置所在时隙加上所述时间差，以获得候选时隙。具体至图11所示示例中，将时隙2加上2个时隙的时间差，可以得到时隙4；将时隙4加上2个时隙的时间差，可以得到时隙6；将时隙6加上2个时隙的时间差，可以得到时隙8；将时隙7加上2个时隙的时间差，可以得到时隙9；将时隙8加上2个时隙的时间差，可以得到下一系统帧(即系统帧n+1)的时隙0。
进一步地，可以通过配置或预配置的方式确定PSFCH接收资源集合中的PSFCH接收资源位于时隙的符号11至符号12。
因而，可以确定系统帧n的时隙4的符号11至符号12、系统帧n的时隙6的符号11至符号12、系统帧n的时隙8的符号11至符号12、系统帧n的时隙9的符号11至符号12、系统帧n+1的时隙0的符号11至符号12为本示例中PSFCH接收资源的候选时域位置。这几个时隙位置可以组成本示例中的PSFCH候选接收资源集合。
当所述不可用符号包含Uu链路的下行符号时：
由于系统帧n+1的时隙0对应于Uu链路的下行，因而，所述时隙0的符号11至符号12不能作为PSFCH接收资源集合的一个时隙 位置。
可以通过配置或预配置的方式确定UE61的PSSCH接收资源集合中每一PSSCH接收资源的时域位置。具体至图11所示示例，假设PSSCH接收资源集合中包含的PSSCH接收资源在10ms周期内位于时隙2、时隙4、时隙6和时隙7。
进一步地，通过执行上述图9所示步骤，能够基于PSSCH接收资源集合以及PSSCH发送资源集合进一步从时隙4、时隙6、时隙8和时隙9的符号11至符号12中筛除不符合要求的PSFCH候选接收资源。
由于时隙4、时隙6即包含PSSCH接收资源又包含PSSCH发送资源，因而，时隙4和时隙6的符号11至符号12能够作为PSFCH接收资源集合的时隙位置。
由于时隙8包含PSSCH发送资源，因而时隙8的符号11至符号12也能作为PSFCH接收资源集合中的时隙位置。
由于时隙9即不包含PSSCH接收资源又不包含PSSCH发送资源，因而，时隙9的符号11至符号12不能作为PSFCH接收资源集合的一个时隙位置。
由此，在图11所示示例中，最终确定的PSFCH接收资源集合包括时隙4、时隙6和时隙8的符号11至符号12。而PSFCH候选接收资源集合中的时隙9、时隙0的符号11至符号12则被舍弃。
而当所述不可用符号包含Uu链路的下行符号和灵活符号时：
参考前述分析，由于只有时隙4和时隙9对应于Uu链路的上行而非下行或灵活，而在时隙4和时隙9中，只有时隙4包含有PSSCH接收资源和PSSCH发送资源中的至少一个，因而，最终确定的PSFCH接收资源集合仅包括时隙4的符号11至符号12。而PSFCH候选接收资源集合中的时隙6、时隙8、时隙9和时隙0的符号11至符号12则被舍弃。
需要注意的是，图11是以PSSCH接收资源集合和PSSCH发送资源集合为例进行具体阐述的，而在实际应用中，本领域技术人员也可以以PSCCH接收资源集合和PSCCH发送资源集合为筛选标准确定合适的PSFCH接收资源集合。
对于NR V2X业务中的发送端而言，可以采用上述图1至图11所示实施例的方案确定反馈接收资源的时域位置，并根据其它技术确定所述反馈接收资源的频域位置。进一步地，在确定的反馈接收时频资源上接收所发送的辅链路数据对应的反馈信息。
进一步地，若根据上述方法无法找到反馈接收资源时域位置，则不接收反馈。
对于NR V2X业务中的接收端而言，可以采用上述图1至图11所示实施例的方案确定反馈发送资源的时域位置，并根据其它技术确定所述反馈发送资源的频域位置。进一步地，在确定的反馈发送时频资源上发送所接收的辅链路数据对应的反馈信息。
进一步地，若根据上述方法无法找到反馈发送资源时域位置，则不发送反馈。
在本实施例的又一个变化例中，上述图1至图11所示实施例可以适于由处于网络覆盖范围内的UE执行，而对于处于网络覆盖范围之外的UE，图1所述实施例中所述步骤S103至步骤S105可以省略。
换言之，对于处于网络覆盖范围之外的UE，可以认为每一候选时域位置所占据的符号均为可用符号。相应的，可以在执行所述步骤S102以确定所述第二资源的候选时域位置后，直接将所述候选时域位置确定为所述第二资源的时域位置。
具体地，本实施例所述反馈资源确定方法还可以包括步骤：在判断所述候选时域位置所占据的符号是否包含不可用符号之前，判断UE是否处于网络覆盖范围内；当判断结果表明UE处于网络覆盖范围之外时，将每一候选时域位置均确定为所述第二资源的时域位置。
由此，可以使得本实施例的方案能够更有针对性的适用于处于不同位置的UE。
图12是本发明实施例的一种用于V2X业务的反馈资源确定装置的结构示意图。本领域技术人员理解，本实施例所述用于V2X业务的反馈资源确定装置3(可简称为反馈资源确定装置3)可以用于实施上述图1至图11所示实施例中所述的方法技术方案。
具体地，在本实施例中，所述反馈资源确定装置3可以包括：获取模块31，用于获取第一资源集合，所述第一资源集合包括至少一个第一资源的时域位置，所述第一资源为PSSCH的传输资源；第一确定模块32，对于每一第一资源，根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置，所述第二资源为PSFCH的传输资源，所述关联反馈信息用于指示PSSCH与PSFCH的时间差；第一判断模块33，对于每一候选时域位置，判断所述候选时域位置所占据的符号是否包含不可用符号，所述不可用符号是指不可用于传输第二资源的符号；第二确定模块34，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置。
在一个实施例中，第二确定模块34可以包括：第一判断子模块341，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第三资源，所述第三资源为PSSCH或PSCCH的传输资源，且所述第三资源的数据传输方向与第一资源的数据传输方向不相同；第一确定子模块342，当判断结果表明所述候选时域位置所在时隙包含所述第三资源时，确定所述候选时域位置为所述第二资源的时域位置。
进一步地，当所述第一资源为发送资源时，所述第三资源可以为接收资源；当所述第一资源为接收资源时，所述第三资源可以为发送资源。
在一个实施例中，所述第二确定模块34可以：第二判断子模块 343，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第四资源，所述第四资源为PSSCH或PSCCH的传输资源，且所述第四资源的数据传输方向与第一资源的数据传输方向相同或不相同；第二确定子模块344，当判断结果表明所述候选时域位置所在时隙包含所述第四资源时，确定所述候选时域位置为所述第二资源的时域位置。
进一步地，当所述第一资源为发送资源时，所述第四资源为接收资源或发送资源；当所述第一资源为接收资源时，所述第四资源为接收资源或发送资源。
在一个实施例中，所述第一确定模块32可以包括：第三确定子模块321，用于根据所述第一资源的结束位置所在时隙以及所述关联反馈信息，确定所述第二资源所在的候选时隙；第四确定子模块322，用于根据配置或预配置的第二资源在时隙内的位置信息确定所述第二资源在所述候选时隙中的候选时域位置。
在一个实施例中，当所述第一资源为发送资源时，所述第二资源可以为接收资源；当所述第一资源为接收资源时，所述第二资源可以为发送资源。
在一个实施例中，所述第一资源集合可以是通过配置或预配置的方式获取的；所述关联反馈信息可以是通过配置或预配置的方式确定的。
在一个实施例中，所述第一资源和第二资源可以为辅链路的资源并复用Uu链路的传输资源，所述不可用符号可以包含Uu链路的下行符号。
进一步地，所述不可用符号还可以包含Uu链路的灵活符号。
在一个实施例中，所述反馈资源确定装置3还可以包括：第二判断模块35，用于在判断所述候选时域位置所占据的符号是否包含不可用符号之前，判断UE是否处于网络覆盖范围内；第三确定模块36， 当判断结果表明UE处于网络覆盖范围之外时，将每一候选时域位置均确定为所述第二资源的时域位置。
进一步地，当所述第二判断模块35的判断结果表明UE处于网络覆盖范围之内时，调用所述第一判断模块33执行相应的操作。
关于所述反馈资源确定装置3的工作原理、工作方式的更多内容，可以参照上述图1至图11中的相关描述，这里不再赘述。
进一步地，本发明实施例还公开一种存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述图1至图11所示实施例中所述的方法技术方案。优选地，所述存储介质可以包括诸如非挥发性(non-volatile)存储器或者非瞬态(non-transitory)存储器等计算机可读存储介质。所述存储介质可以包括ROM、RAM、磁盘或光盘等。
进一步地，本发明实施例还公开一种终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述图1至图11所示实施例中所述的方法技术方案。优选地，所述终端可以是应用于NRV2X场景的用户设备(User Equipment，简称UE)。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (13)

  1. 一种用于V2X业务的反馈资源确定方法，其特征在于，包括：
    获取第一资源集合，所述第一资源集合包括至少一个第一资源的时域位置，所述第一资源为PSSCH的传输资源；
    对于每一第一资源，根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置，所述第二资源为PSFCH的传输资源，所述关联反馈信息用于指示PSSCH与PSFCH的时间差；
    对于每一候选时域位置，判断所述候选时域位置所占据的符号是否包含不可用符号，所述不可用符号是指不可用于传输第二资源的符号；
    当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置。
  2. 根据权利要求1所述的反馈资源确定方法，其特征在于，所述当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置包括：
    当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第三资源，所述第三资源为PSSCH或PSCCH的传输资源，且所述第三资源的数据传输方向与第一资源的数据传输方向不相同；
    当判断结果表明所述候选时域位置所在时隙包含所述第三资源时，确定所述候选时域位置为所述第二资源的时域位置。
  3. 根据权利要求2所述的反馈资源确定方法，其特征在于，当所述第一资源为发送资源时，所述第三资源为接收资源；当所述第一资源为接收资源时，所述第三资源为发送资源。
  4. 根据权利要求1所述的反馈资源确定方法，其特征在于，所述当 判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置包括：
    当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，判断所述候选时域位置所在时隙是否包含第四资源，所述第四资源为PSSCH或PSCCH的传输资源，且所述第四资源的数据传输方向与第一资源的数据传输方向相同或不相同；
    当判断结果表明所述候选时域位置所在时隙包含所述第四资源时，确定所述候选时域位置为所述第二资源的时域位置。
  5. 根据权利要求4所述的反馈资源确定方法，其特征在于，当所述第一资源为发送资源时，所述第四资源为接收资源或发送资源；当所述第一资源为接收资源时，所述第四资源为接收资源或发送资源。
  6. 根据权利要求1所述的反馈资源确定方法，其特征在于，所述根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置包括：
    根据所述第一资源的结束位置所在时隙以及所述关联反馈信息，确定所述第二资源所在的候选时隙；
    根据配置或预配置的第二资源在时隙内的位置信息确定所述第二资源在所述候选时隙中的候选时域位置。
  7. 根据权利要求1所述的反馈资源确定方法，其特征在于，当所述第一资源为发送资源时，所述第二资源为接收资源；当所述第一资源为接收资源时，所述第二资源为发送资源。
  8. 根据权利要求1所述的反馈资源确定方法，其特征在于，所述第一资源集合是通过配置或预配置的方式获取的；所述关联反馈信息是通过配置或预配置的方式确定的，所述第一资源集合与关联反馈信息一一对应。
  9. 根据权利要求1所述的反馈资源确定方法，其特征在于，所述第 一资源和第二资源为辅链路的资源并复用Uu链路的传输资源，所述不可用符号包含Uu链路的下行符号。
  10. 根据权利要求1所述的反馈资源确定方法，其特征在于，还包括：
    在判断所述候选时域位置所占据的符号是否包含不可用符号之前，判断UE是否处于网络覆盖范围内；
    当判断结果表明UE处于网络覆盖范围之外时，将每一候选时域位置均确定为所述第二资源的时域位置。
  11. 一种用于V2X业务的反馈资源确定装置，其特征在于，包括：
    获取模块，用于获取第一资源集合，所述第一资源集合包括至少一个第一资源的时域位置，所述第一资源为PSSCH的传输资源；
    第一确定模块，对于每一第一资源，根据所述第一资源的时域位置以及关联反馈信息确定所述第一资源对应的第二资源的候选时域位置，所述第二资源为PSFCH的传输资源，所述关联反馈信息用于指示PSSCH与PSFCH的时间差；
    第一判断模块，对于每一候选时域位置，判断所述候选时域位置所占据的符号是否包含不可用符号，所述不可用符号是指不可用于传输第二资源的符号；
    第二确定模块，当判断结果表明所述候选时域位置所占据的符号不包含不可用符号时，确定所述候选时域位置为所述第二资源的时域位置。
  12. 一种存储介质，其上存储有计算机指令，其特征在于，所述计算机指令运行时执行权利要求1至10任一项所述方法的步骤。
  13. 一种终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，其特征在于，所述处理器运行所述计算机指令时执行权利要求1至10任一项所述方法的步骤。
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