WO2024067333A1 - 一种适用于直通链路的资源选择方法、装置及用户设备 - Google Patents

一种适用于直通链路的资源选择方法、装置及用户设备 Download PDF

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Publication number
WO2024067333A1
WO2024067333A1 PCT/CN2023/120277 CN2023120277W WO2024067333A1 WO 2024067333 A1 WO2024067333 A1 WO 2024067333A1 CN 2023120277 W CN2023120277 W CN 2023120277W WO 2024067333 A1 WO2024067333 A1 WO 2024067333A1
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Prior art keywords
psfch
pssch
transmission
time
harq feedback
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PCT/CN2023/120277
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English (en)
French (fr)
Inventor
王亚坤
赵锐
温小然
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中信科智联科技有限公司
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Publication of WO2024067333A1 publication Critical patent/WO2024067333A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/53Allocation or scheduling criteria for wireless resources based on regulatory allocation policies

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a resource selection method, device and user equipment applicable to a direct link.
  • PSSCH Physical Sidelink Shared Channel
  • PSFCH Physical Sidelink Feedback Channel
  • one PSSCH transmission corresponds to only one PSFCH feedback.
  • SL-U Sidelink Operation on Unlicensed Spectrum
  • PSSCH and PSFCH are in a one-to-many relationship.
  • PSSCH resource selection mechanism under the one-to-many relationship between PSSCH and PSFCH is missing.
  • the purpose of the present disclosure is to provide a resource selection method, device and user equipment suitable for a direct link, so as to solve the problem of lack of a PSSCH resource selection mechanism under a one-to-many relationship between PSSCH and PSFCH.
  • an embodiment of the present disclosure provides a resource selection method, which is applied to a first user equipment, and the method includes:
  • a resource selection is performed in a resource pool supporting hybrid automatic repeat request (HARQ) feedback, wherein the selected resource is used for physical direct link control channel PSCCH transmission and physical direct link shared channel PSSCH transmission; and the corresponding relationship between the PSSCH transmission and the physical direct link feedback channel PSFCH transmission includes at least one of the following:
  • One PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units;
  • One PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units;
  • M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • the resources selected for the PSSCH transmission meet at least one of the following requirements:
  • the time interval between any two resources used for the PSSCH transmission is greater than or equal to the HARQ feedback time
  • the sidelink control information indicates a restriction, which is used to limit the range of the time unit where the PSSCH transmission resource indicated by the SCI is located.
  • the HARQ feedback time is the sum of a first time length and a second time length, wherein:
  • the first time length is the PSFCH reception and processing time and the retransmission preparation time
  • the second time length is any one of the following:
  • N is a positive integer less than or equal to M2.
  • the N is configured, pre-configured or determined based on at least one of the following: the maximum number of resources indicated by the SCI, the number of resources indicated by the SCI, the maximum interval between the resources indicated by the SCI, the period of PSFCH configuration, the minimum time interval between the PSSCH and the corresponding PSFCH, PSFCH reception and processing time, retransmission preparation time, and channel occupancy time (Channel Occupancy Time, COT).
  • the selecting a resource in a resource pool supporting hybrid automatic repeat request HARQ feedback includes:
  • resource selection is performed according to any of the following principles:
  • selecting resources according to the principle of giving priority to satisfying the SCI indication restriction includes:
  • Adjust the number of PSFCH transmissions corresponding to the PSSCH transmission wherein the number of PSFCH transmissions corresponding to the PSSCH transmission is configured, pre-configured, or determined according to at least one of the following: the maximum number of resources indicated by the SCI, the number of resources indicated by the SCI, the maximum interval between resources indicated by the SCI, the period of PSFCH configuration, the minimum time interval between the PSSCH and the corresponding PSFCH, the PSFCH reception and processing time, the retransmission preparation time, and the COT;
  • resource selection is performed in the resource pool.
  • the method further comprises:
  • the relevant information of the PSFCH is indicated by the SCI, and the relevant information includes at least one of the following:
  • the method further comprises:
  • the PSFCH corresponding to the PSSCH is received.
  • the method further comprises any of the following:
  • the HARQ feedback information is continued to be received at the transmission time of the subsequent PSFCH corresponding to the PSSCH.
  • the method comprises:
  • the next adjacent PSSCH transmission is not performed;
  • the next adjacent PSSCH transmission is performed.
  • an embodiment of the present disclosure provides a resource selection method applicable to a through link, which is applied to a second user equipment, including:
  • the corresponding relationship between the PSSCH transmission and the PSFCH transmission includes at least one of the following:
  • One PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units;
  • One PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units;
  • M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • the method further comprises:
  • relevant information of the PSFCH actually corresponding to the PSSCH transmission is obtained according to the received SCI, and the relevant information includes at least one of the following:
  • the method further comprises:
  • the first PSFCH and the second PSFCH correspond to the same PSSCH, and the second PSFCH is located after the first PSFCH.
  • determining a first resource used by a second PSFCH and HARQ feedback information carried by the second PSFCH includes:
  • determining the first resource according to the time-frequency position information of the second resource used for the PSSCH transmission, and the HARQ feedback information carried by the second PSFCH is the same as the HARQ feedback information carried by the first PSFCH;
  • the first condition includes any of the following:
  • the next adjacent PSSCH transmission is located after the transmission time of the second PSFCH;
  • the next adjacent PSSCH transmission is located before the transmission time of the second PSFCH, and the HARQ restriction condition is not satisfied between the transmission time of the next adjacent PSSCH transmission and the second PSFCH.
  • determining a first resource used by a second PSFCH and HARQ feedback information carried by the second PSFCH includes:
  • next adjacent PSSCH transmission is before the transmission time of the second PSFCH, and the HARQ restriction condition is not satisfied between the next adjacent PSSCH transmission and the transmission time of the second PSFCH, perform any one of the following:
  • the first resource is determined, and based on the decoding results of the Y PSSCHs, the HARQ feedback information carried by the second PSFCH is determined; wherein Y is a configured or pre-configured positive integer.
  • an embodiment of the present disclosure provides a resource selection device, which is applied to a first user equipment, including:
  • the selection module is used to select resources in the resource pool supporting HARQ feedback, wherein the selection The selected resources are used for PSCCH transmission and PSSCH transmission; the corresponding relationship between the PSSCH transmission and the PSFCH transmission includes at least one of the following:
  • One PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units;
  • One PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units;
  • M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • an embodiment of the present disclosure provides a through link resource selection device, which is applied to a second user equipment, including:
  • a receiving module used for receiving PSCCH and PSSCH
  • a first sending module configured to perform HARQ feedback on a PSFCH transmission corresponding to a PSSCH transmission
  • the corresponding relationship between the PSSCH transmission and the PSFCH transmission includes at least one of the following:
  • One PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units;
  • One PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units;
  • M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • an embodiment of the present disclosure also provides a user equipment, including a transceiver, a memory, a processor, and a computer program stored on the memory and running on the processor, wherein when the processor executes the computer program, the resource selection method applicable to the direct link as described in the first aspect is implemented, or the resource selection method applicable to the direct link as described in the second aspect is implemented.
  • the embodiment of the present disclosure further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the resource selection method applicable to the direct link as described in the first aspect, or the resource selection method applicable to the direct link as described in the second aspect is implemented.
  • Resource selection method for direct links is implemented.
  • the resource selection method for a direct link of an embodiment of the present disclosure is applied to a first user equipment, the method includes selecting resources in a resource pool supporting HARQ feedback, wherein the selected resources are used for PSCCH transmission and PSSCH transmission; the correspondence between the PSSCH transmission and the PSFCH transmission includes at least one of the following: one PSSCH transmission corresponds to M1 times of the PSFCH transmission located in different time units; one PSSCH transmission corresponds to at most M2 times of the PSFCH transmission located in different time units; wherein M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • the resources selected for the PSSCH transmission can have multiple PSFCH feedback opportunities between any two PSSCH transmissions, effectively avoiding the problem of PSFCH being unable to be sent due to channel access failure, and the inability to send PSFCH will further lead to excessive retransmissions, resulting in resource waste or causing the sender to cancel subsequent retransmissions when the receiver fails to receive successfully, resulting in data packet decoding failure.
  • FIG1 is a schematic diagram showing a one-to-one correspondence between PSSCH and PSFC H;
  • FIG2 is a schematic diagram of a flow chart of a resource selection method applicable to a through link according to an embodiment of the present disclosure
  • FIG3 is a second flow chart of a resource selection method applicable to a through link according to an embodiment of the present disclosure
  • FIG4 is a schematic diagram showing a one-to-two correspondence between PSSCH and PSFCH in an embodiment of the present disclosure
  • FIG5 is a schematic diagram showing that the correspondence between PSSCH and PSFCH is one to two at most in an embodiment of the present disclosure
  • FIG6 is a schematic diagram of resource selection when the HARQ feedback time and the SCI indication restrictions cannot be satisfied at the same time in an embodiment of the present disclosure
  • FIG7 is a second schematic diagram of resource selection when the HARQ feedback time and the SCI indication restrictions cannot be satisfied at the same time in an embodiment of the present disclosure
  • FIG8 is a schematic diagram of PSFCH feedback according to an embodiment of the present disclosure.
  • FIG9 is a second schematic diagram of PSFCH feedback according to an embodiment of the present disclosure.
  • FIG10 is a schematic diagram of a structure of a resource selection device applicable to a through link according to an embodiment of the present disclosure
  • FIG11 is a second structural diagram of a resource selection device applicable to a through link according to an embodiment of the present disclosure
  • FIG. 12 is a schematic diagram of the structure of a user device according to an embodiment of the present disclosure.
  • sequence numbers of the following processes do not imply the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present disclosure.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B can also be determined according to A and/or other information.
  • Hybrid Automatic Repeat reQuest (HARQ) feedback mechanism 1. Hybrid Automatic Repeat reQuest (HARQ) feedback mechanism
  • This feedback method is applicable to unicast and connected multicast. The advantage is that it can distinguish the discontinuous transmission (DTX) state, but for multicast, it is mainly used when there are fewer UEs in the group, because each receiving UE has independent PSFCH resources. If there are more UEs in the group, there will be problems with PSFCH resource allocation.
  • NACK only feedback mode This mode is suitable for connectionless multicast. All receiving UEs share the same PSFCH feedback resource. If any UE fails to receive PSSCH correctly, HARQ NACK information is sent on the corresponding PSFCH resource. The potential problem of this mode is that it cannot distinguish between the DTX and ACK states. Therefore, when the Physical Sidelink Control Channel (PSSCH) detects an error, the transmitting (TX) UE cannot detect the PSSCH transmission error.
  • PSSCH Physical Sidelink Control Channel
  • TX transmitting
  • the current PSFCH resource is determined by an implicit mapping method, and there is a one-to-one mapping between PSFCH and PSSCH, that is, one PSSCH corresponds to only one PSFCH resource in a time slot.
  • the mapping methods include:
  • Method 1 Map the PSFCH candidate resources based on the timeslot number of the associated PSSCH and the number of the starting subchannel;
  • Method 2 Map the PSFCH candidate resources based on the timeslot number of the associated PSSCH and the number of the subchannel occupied by the PSSCH transmission.
  • a represents the time interval between the last symbol of the PSSCH transmission of the first resource (referring to the first resource between any two resources mentioned above) and the first starting symbol of the corresponding PSFCH reception; wherein, the time interval is based on the high-level parameter sl-MinTimeGapPSFCH-r16 (representing the minimum time difference between the PSSCH and the corresponding PSFCH, the value can be ⁇ 2, 3 ⁇ , the unit is time slot) and the high-level parameter sl-PSFCH-Period-r16 (representing the period of PSFCH resource configuration in the resource pool, the value can be ⁇ 0, 1, 2, 4 ⁇ , the unit is time slot;
  • b represents the PSFCH reception and processing time and retransmission preparation time (including physical channel multiplexing and TX-RX/RX-TX conversion time), and its value depends on the UE implementation.
  • an embodiment of the present disclosure provides a resource selection method applicable to a through link, which is applied to a first user equipment, and the method includes:
  • Step 201 Select resources in a resource pool supporting HARQ feedback, wherein the selected resources are used for PSCCH transmission and PSSCH transmission; the corresponding relationship between the PSSCH transmission and the PSFCH transmission includes at least one of the following:
  • One PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units;
  • One PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units;
  • M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • PSCCH is used to transmit direct link scheduling information, that is, PSCCH is used to transmit scheduling information of PSSCH;
  • the time unit can be a time granularity such as a subframe or a time slot;
  • M1 and M2 can be the same or different.
  • the first user equipment selects resources for PSCCH transmission and PSSCH transmission in the resource pool supporting HARQ feedback; wherein, the correspondence between PSSCH transmission and PSFCH transmission corresponding to PSSCH transmission includes at least one of the following: one PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units; one PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units; wherein, M1 and M2 are configured or pre-configured positive integers, and PSFCH is used to carry HARQ feedback information.
  • the resources selected for the PSSCH transmission meet at least one of the following requirements:
  • the time interval between any two resources used for the PSSCH transmission is greater than or equal to the HARQ feedback time
  • any two PSSCH transmissions belong to the same transport block (TB); that is, the time interval between any two PSSCH transmissions in the same TB should be greater than or equal to the HARQ feedback time.
  • SCI Sidelink Control Information
  • the resources indicated by the SCI include the current transmission (the current transmission refers to the transmission corresponding to the SCI) and the resources for subsequent transmissions indicated by the time domain resource indicator value (Time Resource Indicator Value, TRIV)/frequency domain resource indicator value (Frequency Resource Indicator Value, FRIV).
  • the number of resources indicated by the SCI is 3, which means that the current transmission and the subsequent two retransmissions need to be within 32 time slots.
  • the resources used for PSSCH transmission are PSSCH transmission resources.
  • the HARQ feedback time is the sum of the first time length and the second time length;
  • the first time length is the PSFCH reception and processing time and the retransmission preparation time; that is, the first time length includes the time for the first user equipment to receive and process the PSFCH and the preparation time for retransmitting the PSSCH, that is, the first time length is the sum of the time for receiving and processing the PSFCH and the preparation time for retransmitting the PSSCH;
  • the second time length is any one of the following:
  • N is a positive integer less than or equal to M2.
  • Example 1 One PSSCH transmission corresponds to M1 PSFCH transmissions in different time units
  • one PSSCH transmission corresponds to two PSFCH transmissions, and the two PSFCH transmissions are two consecutive PSFCH transmissions.
  • the first user equipment determines the resources for the first PSFCH transmission, it is necessary to consider the minimum time requirement between the PSSCH and the corresponding PSFCH. That is, the first PSFCH is the most recent PSFCH that meets the minimum time requirement (the time interval represented by “a” in FIG4 is greater than or equal to the minimum time requirement).
  • the time interval between the retransmission of PSCCH/PSSCH and the second PSFCH corresponding to the initial transmission of PSCCH/PSSCH (the time interval represented by “b” in FIG4 ) needs to ensure the PSFCH reception and processing time (the time for receiving and processing PSFCH) and the retransmission preparation time (the time for PSCCH/PSSCH to prepare for retransmission), that is, the time interval between the retransmission of PSCCH/PSSCH and the second PSFCH corresponding to the initial transmission of PSCCH/PSSCH should be greater than or equal to the sum of the PSFCH reception and processing time and the retransmission preparation time.
  • Example 2 One PSSCH transmission corresponds to at most M2 PSFCH transmissions in different time units
  • one PSSCH transmission corresponds to at most two PSFCH transmissions, wherein the first transmitted PSSCH corresponds to two PSFCH transmissions (i.e., N is 2). Therefore, the first retransmission needs to be located after the second PSFCH corresponding to the first transmission, and the time interval between the second PSFCH corresponding to the first transmission and the first retransmission PSSCH (the time interval represented by “b” between the second PSFCH transmission corresponding to the first transmission and the first retransmission in FIG5 ) needs to ensure the time for PSFCH reception and processing and the retransmission preparation time; the time interval between the last character in the resource of the first transmitted PSSCH and the starting symbol in the resource of the two PSFCH transmissions corresponding to the first transmitted PSSCH (for example, the time interval represented by “a” between the first transmission and the first PSFCH transmission in FIG5 ) should meet the minimum time interval requirement, which can be determined based on high-level parameters;
  • the first PSSCH retransmission corresponds to a PSFCH transmission (i.e., N is 1). Therefore, the interval between the two retransmissions needs to meet the time requirements in the relevant technology; specifically, the time interval between the last character of the resource of the first PSSCH retransmission and the first character of the PSFCH transmission corresponding to the first PSSCH retransmission (the time interval represented by "a” in Figure 5) should meet the minimum time interval Requirements, as mentioned above, the minimum time interval requirement can be determined based on high-level parameters; the time interval between the second PSSCH retransmission and the PSFCH corresponding to the first PSSCH retransmission (the time interval represented by "b” in Figure 5) needs to ensure the time for PSFCH reception and processing and the retransmission preparation time.
  • the time for receiving and processing PSFCH and the minimum value of the PSSCH retransmission preparation time should depend on the terminal implementation, wherein the time for receiving and processing PSFCH and the PSSCH retransmission preparation time include: physical channel multiplexing and conversion time from sending to receiving (TX-RX)/receiving to sending (RX-TX), etc.
  • the N is configured, pre-configured or determined based on at least one of the following: the maximum number of resources indicated by the SCI, the number of pre-sources indicated by the SCI, the maximum interval between resources indicated by the SCI, the period of PSFCH configuration, the minimum time interval between the PSSCH and the corresponding PSFCH (which can be: the minimum time interval between the last character of the resource transmitted by the PSSCH and the first character of the first PSFCH transmitted resource corresponding to the PSSCH), PSFCH reception and processing time (time for receiving and processing PSFCH), retransmission preparation time (time for preparing for retransmission), and channel occupied time (Channel Occupied Time, COT).
  • the maximum duration of the determined COT is 10 time slots and the period of the PSFCH configuration is 4 slots.
  • the maximum configuration of N is 2, that is, one PSSCH transmission corresponds to at most two PSFCH transmissions.
  • each PSSCH corresponds to a maximum of 3 PSFCH transmissions.
  • step 201 selecting resources in a resource pool supporting hybrid automatic repeat request HARQ feedback, includes:
  • resource selection is performed according to any of the following principles:
  • the HARQ feedback time may be given priority, that is, the time interval between any two PSSCH transmissions meets the configured, preconfigured or pre-defined HARQ feedback time; the SCI indication restriction may also be given priority, that is, ensuring that the resources indicated by the SCI are within the configured, preconfigured or pre-defined time unit range (such as 32 time slots).
  • resource selection is performed according to the principle of giving priority to satisfying the SCI indication restriction, including:
  • Adjust the number of PSFCH transmissions corresponding to the PSSCH transmission wherein the number of PSFCH transmissions corresponding to the PSSCH transmission is configured, pre-configured, or determined according to at least one of the following: the maximum number of resources indicated by the SCI, the number of resources indicated by the SCI, the maximum interval between resources indicated by the SCI, the period of PSFCH configuration, the minimum time interval between the PSSCH and the corresponding PSFCH, the PSFCH reception and processing time, the retransmission preparation time, and the COT;
  • resource selection is performed in the resource pool.
  • one PSSCH transmission corresponds to K PSFCH transmissions, where the configured or pre-configured K is a positive integer less than or equal to M2, where K can be determined based on at least one of the above factors, and as a special case, K can be configured or pre-configured only to 1.
  • the maximum number of resources reserved for the SCI indication configured in the resource pool is 3.
  • the configuration period of PSFCH is 4, so 1 PSSCH corresponds to 3 adjacent PSFCHs located in different time slots. Therefore, if the resource selection is performed according to the relationship of 1 to 3 between PSSCH and PSFCH, the time interval between the initial transmission and the retransmission is greater than the maximum SCI indication interval (32 time slots). Therefore, in this case, in order to meet the SCI indication restriction, the initial transmission can only indicate the first retransmission, and the first retransmission can only indicate the second retransmission.
  • the resources of some PSSCH transmissions in the resources indicated by the SCI can also meet the HARQ feedback time limit, and the resources indicated by the SCI meet the limit indicated by the SCI.
  • the maximum number of resources indicated by the SCI configured in the resource pool is 3.
  • the initial transmission PSSCH can correspond to 3 PSFCHs.
  • the first PSSCH retransmission corresponds to two PSFCHs, thereby ensuring that the initial transmission and retransmission are within the range of the time unit limited by the SCI indication (such as 32 time slots).
  • the method further includes:
  • the relevant information of the PSFCH is indicated by the SCI, and the relevant information includes at least one of the following:
  • an indication field may be added to the SCI so that the PSFCH related information is carried in the indication field.
  • the SCI is any one of the following:
  • the first stage direct link control information 1st-stage SCI, the 1st-stage SCI is carried on the PSCCH;
  • the second stage direct link control information 2nd-stage SCI, the 2nd-stage SCI is carried on the PSSCH.
  • the method further includes:
  • the PSFCH corresponding to the PSSCH is received. Specifically, this step includes: receiving in sequence the multiple PSFCHs corresponding to the PSSCH until the HARQ feedback information is successfully received.
  • the method further includes any of the following:
  • the HARQ feedback information carried by the PSFCH is successfully received, determining whether to perform the next PSSCH transmission according to the HARQ feedback information; specifically, if the HARQ feedback information is ACK, canceling the subsequent retransmission, and if the HARQ feedback information is NACK, continuing to perform the next PSSCH transmission;
  • the HARQ feedback information is continued to be received at the transmission time of the subsequent PSFCH corresponding to the PSSCH; it should be noted that the "subsequent PSFCH" in this step is: the one of the multiple PSFCHs corresponding to the PSSCH located at the carrier The PSFCH following the PSFCH of the HARQ feedback information that was not successfully received.
  • the method further includes any of the following:
  • the next adjacent PSSCH transmission may not be performed to wait for the reception of the subsequent PSFCH corresponding to this PSSCH transmission.
  • the resources of three PSSCH transmissions of a TB meet the transmission interval restrictions in the relevant technology.
  • the initial transmission is located in the m0 time slot, which corresponds to two PSFCH feedback moments.
  • the first user equipment receives feedback information at time m1, and the possible situations are as follows:
  • Receive ACK cancel the subsequent transmission of this TB
  • the second user equipment can continue to receive PSFCH at time m2; if ACK information is received at time m2, subsequent transmission is canceled; if NACK information is received or no feedback information is received, the second PSSCH retransmission is continued at time m3.
  • next adjacent PSSCH transmission is executed; that is, in the case where the first user equipment fails to successfully receive the HARQ feedback information, it does not need to continue to wait for the subsequent PSFCH transmission corresponding to the PSSCH transmission, which can reduce the transmission delay.
  • execution of the next adjacent PSSCH transmission mentioned here only means that the first user equipment can perform this operation, but it is also necessary to consider whether another PSFCH transmission is received before the next PSSCH transmission.
  • the first user equipment has two PSFCH reception opportunities after the first PSSCH transmission and before the second PSSCH transmission.
  • the first user equipment does not receive the HARQ feedback information at the first PSFCH reception time, and then the first user equipment can continue to receive the HARQ feedback information at the second PSFCH reception time. If the HARQ feedback information is still not received at this time, the first user equipment can perform the second PSSCH transmission. However, if the first user equipment has only one PSFCH transmission after the first PSSCH transmission and before the second PSSCH transmission, and does not receive the HARQ feedback information at the corresponding time, the second PSSCH transmission can be directly performed. That is, the first user equipment determines whether to perform the second PSSCH transmission based on whether the HARQ feedback information is received at all PSFCH moments between the first PSSCH transmission and the second PSSCH transmission.
  • the number of retransmissions triggered by the failure to receive feedback information needs to be less than or equal to the configured or preconfigured first value.
  • the embodiment of the present disclosure further provides a resource selection method applicable to a through link, which is applied to a second user equipment, including:
  • Step 301 receiving PSCCH and PSSCH; specifically, this step is to receive PSCCH and PSSCH sent by the first user equipment, more specifically, to receive PSSCH sent by the first user equipment, or to receive PSCCH and PSSCH sent by the first user equipment;
  • Step 302 performing HARQ feedback on the PSFCH transmission corresponding to the PSSCH transmission
  • the corresponding relationship between the PSSCH transmission and the PSFCH transmission includes at least one of the following:
  • One PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units;
  • One PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units;
  • M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • the second user equipment first receives the PSCCH and the PSSCH, and then performs HARQ feedback on multiple PSFCH transmissions corresponding to the PSSCH transmissions, so that multiple PSFCHs can be transmitted between two adjacent PSSCH transmissions.
  • the feedback opportunity effectively avoids the problem of PSFCH being unable to be sent due to channel access failure, and further avoids excessive retransmissions due to PSFCH being unable to be sent, resulting in resource waste or causing the sender to cancel subsequent retransmissions when the receiver fails to receive the data, resulting in data packet decoding failure.
  • the method further includes:
  • relevant information of the PSFCH actually corresponding to the PSSCH transmission is obtained according to the received SCI, and the relevant information includes at least one of the following:
  • the transmission position of the PSFCH that actually corresponds to the PSSCH transmission can be determined based on the acquired relevant information, so as to perform HARQ feedback at the transmission position of the PSFCH.
  • the method further includes:
  • the first PSFCH and the second PSFCH correspond to the same PSSCH, and the second PSFCH is located after the first PSFCH.
  • the HARQ feedback information is sent on the second PSFCH, specifically, the HARQ feedback information is sent on the second PSFCH when the channel access is successful; that is, the premise for sending the HARQ feedback information on the second PSFCH is that the second user equipment has successfully accessed the channel.
  • determining the first resource used by the second PSFCH and the HARQ feedback information carried by the second PSFCH includes:
  • determining the first resource according to the time-frequency position of the second resource used for the PSSCH transmission, and the HARQ feedback information carried by the second PSFCH is the same as the HARQ feedback information carried by the first PSFCH;
  • the first condition includes any of the following:
  • the next adjacent PSSCH transmission is located after the transmission time of the second PSFCH;
  • the next adjacent PSSCH transmission is located before the transmission time of the second PSFCH, and the first resource and the second resource do not meet the HARQ restriction condition.
  • the PSSCH transmission refers to the current PSSCH transmission;
  • the first resource is specifically the frequency domain resource of the second PSFCH transmission;
  • the HARQ feedback restriction condition is the time length represented by "a" in the aforementioned related technology, or it can be understood that considering the minimum time interval requirement between PSSCH and PSFCH, the HARQ feedback information corresponding to the adjacent next PSSCH cannot be sent at the transmission time of the second PSFCH; therefore, this optional embodiment is specifically: in the time domain, if the adjacent next PSSCH transmission is located after the transmission time of the second PSFCH, or, in the time domain, the adjacent next PSSCH transmission is located before the transmission time of the second PSFCH and the time interval between the two does not meet the HARQ restriction condition, based on the time-frequency position information of the second resource used for this PSSCH transmission, the frequency domain resource of the second PSFCH is determined, and it is determined that the HARQ feedback information carried by the second PSFCH is the same as the HARQ
  • determining the first resource used by the second PSFCH and the HARQ feedback information carried by the second PSFCH includes:
  • next adjacent PSSCH transmission is before the transmission time of the second PSFCH, and the HARQ restriction condition is satisfied between the next adjacent PSSCH transmission and the transmission time of the second PSFCH, perform any one of the following:
  • the first resource is determined, and based on the decoding results of the Y PSSCHs, the HARQ feedback information carried by the second PSFCH is determined; wherein Y is a configured or pre-configured positive integer.
  • the PSSCH transmission refers to the current PSSCH transmission; both, the first resource is specifically the frequency domain resource of the second PSFCH transmission.
  • the HARQ feedback restriction condition is the time length represented by "a" in the aforementioned related technology; second, when the HARQ feedback restriction is met between the current PSSCH transmission and the second PSFCH corresponding to the current PSSCH transmission, the second user equipment can perform HARQ feedback at the feedback time of the second PSFCH based on the decoding result of the current PSSCH transmission and its time-frequency position; or, based on the time-frequency position of the resources used for the next adjacent PSSCH transmission and its decoding result, perform HARQ feedback at the feedback time of the second PSFCH; or, based on the time-frequency position of each resource used for the previous Y PSSCH transmissions and the corresponding decoding results, perform HARQ feedback at the feedback time of the second PSFCH, at which time the second PSFCH carries multiple HARQ feedback information, wherein each PSSCH transmission in the Y PSSCH transmissions corresponds to one HARQ feedback information; fifth, Y can be a positive integer less than
  • the transmitter selects resources according to the time requirement in the relevant technology, and each transmission corresponds to two PSFCH transmissions.
  • the receiver determines the HARQ feedback information based on the decoding result of the PSSCH, but due to the failure of channel access, the HARQ feedback information cannot be sent at the first PSFCH transmission time. Then, because the transmitter does not receive any feedback information, it will perform a second PSSCH transmission (i.e., retransmission), and the processing method of the receiver may include:
  • Processing method 1 If the receiving end has successfully decoded the initial transmission, it is no longer necessary to receive or decode the retransmission.
  • the HARQ feedback information sent directly at the second PSFCH transmission time is ACK, and the transmission resources at the second PSFCH transmission time are selected based on the time-frequency information of the initial transmission;
  • Processing method 2 If the receiving end fails to decode the initial transmission, it needs to continue decoding the retransmission, and then determine the HARQ feedback information sent at the second PSFCH transmission time based on the decoding result of the retransmission, and select the transmission resource at the second PSFCH transmission time based on the time-frequency information of the retransmission;
  • Processing method three If the receiving end fails to decode successfully during the initial transmission, it needs to continue decoding the retransmission, and then send the HARQ feedback information corresponding to the initial transmission and the HARQ feedback information corresponding to the retransmission at the same time at the second PSFCH sending time, and select the sending resources at the second PSFCH sending time based on the time-frequency information of the initial transmission and the retransmission.
  • the resource selection method applicable to the through link in the embodiment of the present disclosure can ensure that one PSSCH transmission corresponds to multiple PSFCH feedbacks. On the one hand, it can alleviate the situation where PSFCH cannot be sent due to channel access failure, thereby avoiding the following problems caused by the inability to send PSFCH: First, for the NACK only feedback method, if NACK cannot be sent due to channel access failure, the sending end user equipment (first user equipment) will think that the receiving end user equipment (second user equipment) has successfully received it, and will no longer retransmit, but the actual receiving end has not received it successfully.
  • the sending end user equipment can be considered to be in a state of unsuccessful reception, resulting in unnecessary transmission; on the other hand, based on the method of dynamically adjusting the number of PSFCH transmissions, it can be ensured that in the case of multiple PSFCH transmissions, the transmission delay can be reduced as much as possible and the number of SCI indication resources can be increased; thirdly, the HARQ feedback method in the embodiment of the present disclosure can ensure that the receiving end user equipment makes more full use of multiple PSFCH feedback opportunities and reduces unnecessary retransmissions.
  • execution of PSSCH transmission, execution of PSFCH transmission, sending PSSCH, sending PSFCH, etc. mentioned in the embodiments of the present disclosure all refer to operations performed by the user equipment on the premise that the channel access is successful.
  • the embodiment of the present disclosure further provides a resource selection device applicable to a through link, which is applied to a first user equipment, including:
  • the selection module 1001 is configured to select resources in a resource pool supporting HARQ feedback, wherein the selected resources are used for PSCCH transmission and PSSCH transmission; and the corresponding relationship between the PSSCH transmission and the PSFCH transmission includes at least one of the following:
  • One PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units;
  • One PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units;
  • M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • the resources selected for the PSSCH transmission meet at least one of the following requirements:
  • the time interval between any two resources used for the PSSCH transmission is greater than or equal to the HARQ feedback time
  • the direct link control information SCI indicates a restriction, which is used to limit the range of the time unit where the PSSCH transmission resource indicated by the SCI is located.
  • the HARQ feedback time is the sum of a first time length and a second time length, wherein:
  • the first time length is the PSFCH reception and processing time and the retransmission preparation time
  • the second time length is any one of the following:
  • N is a positive integer less than or equal to M2.
  • the N is configured, pre-configured or determined based on at least one of the following: the maximum number of resources indicated by the SCI, the number of resources indicated by the SCI, the maximum interval between the resources indicated by the SCI, the period of PSFCH configuration, the minimum time interval between the PSSCH and the corresponding PSFCH, the PSFCH reception and processing time, the retransmission preparation time, and the channel occupancy time COT.
  • the selection module 1001 is specifically used for:
  • resource selection is performed according to any of the following principles:
  • the selection module 1001 when used to select resources according to the principle of giving priority to satisfying the SCI indication restriction, it is specifically used to:
  • Adjust the number of PSFCH transmissions corresponding to the PSSCH transmission wherein the number of PSFCH transmissions corresponding to the PSSCH transmission is configured, pre-configured, or determined according to at least one of the following: the maximum number of resources indicated by the SCI, the number of resources indicated by the SCI, the maximum interval between resources indicated by the SCI, the period of PSFCH configuration, the minimum time interval between the PSSCH and the corresponding PSFCH, the PSFCH reception and processing time, the retransmission preparation time, and the COT;
  • the device further comprises:
  • An indication module configured to indicate the relevant information of the PSFCH through the SCI, where the relevant information includes at least one of the following:
  • the SCI is any one of the following:
  • the first stage direct link control information 1st-stage SCI, the 1st-stage SCI is carried on the PSCCH;
  • the second stage direct link control information 2nd-stage SCI, the 2nd-stage SCI is carried on the PSSCH.
  • the device also includes:
  • a sending module used for sending the PSCCH and PSSCH on the selected resources for PSCCH and PSSCH transmission
  • the receiving module is used to receive the PSFCH corresponding to the PSSCH.
  • the device also includes:
  • the first processing module is configured to perform at least one of the following:
  • the HARQ feedback information is continued to be received at the transmission time of the subsequent PSFCH corresponding to the PSSCH.
  • the device also includes:
  • the second processing module is used to perform any of the following:
  • the next adjacent PSSCH transmission is not performed;
  • the next adjacent PSSCH transmission is performed.
  • the embodiment of the present disclosure further provides a resource selection device applicable to a through link, which is applied to a second user equipment, including:
  • a receiving module 1101 is used to receive PSCCH and PSSCH;
  • a first sending module 1102 configured to perform HARQ feedback on a PSFCH transmission corresponding to a PSSCH transmission
  • the corresponding relationship between the PSSCH transmission and the PSFCH transmission includes at least one of the following:
  • One PSSCH transmission corresponds to M1 PSFCH transmissions located in different time units;
  • One PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units;
  • M1 and M2 are configured or pre-configured positive integers, and the PSFCH is used to carry HARQ feedback information.
  • the device also includes:
  • An acquisition module configured to acquire, according to the received SCI, relevant information of the PSFCH actually corresponding to the PSSCH transmission, when the corresponding relationship is that one PSSCH transmission corresponds to at most M2 PSFCH transmissions located in different time units, wherein the relevant information includes at least one of the following:
  • the device also includes:
  • a determination module configured to determine a first resource used by a second PSFCH and HARQ feedback information carried by the second PSFCH when HARQ feedback information cannot be successfully sent on the first PSFCH due to a channel access failure;
  • a second sending module configured to send the HARQ feedback information on the second PSFCH based on the first resource
  • the first PSFCH and the second PSFCH correspond to the same PSSCH, and the second PSFCH is located after the first PSFCH.
  • the determining module is specifically used to:
  • determining the first resource according to the time-frequency position information of the second resource used for the PSSCH transmission, and the HARQ feedback information carried by the second PSFCH is the same as the HARQ feedback information carried by the first PSFCH;
  • the first condition includes any of the following:
  • the next adjacent PSSCH transmission is located after the transmission time of the second PSFCH;
  • the next adjacent PSSCH transmission is located before the transmission time of the second PSFCH, and the HARQ restriction condition is not satisfied between the transmission time of the next adjacent PSSCH transmission and the second PSFCH.
  • the determining module is specifically used to:
  • next adjacent PSSCH transmission is before the transmission time of the second PSFCH, and the HARQ restriction condition is satisfied between the next adjacent PSSCH transmission and the transmission time of the second PSFCH, perform any one of the following:
  • the first resource is determined, and based on the decoding results of the Y PSSCHs, the HARQ feedback information carried by the second PSFCH is determined; wherein Y is a configured or pre-configured positive integer.
  • an embodiment of the present disclosure also provides a user device, including: a processor 1200, a memory 1220, and a program stored on the memory 1220 and executable on the processor 1200.
  • a user device including: a processor 1200, a memory 1220, and a program stored on the memory 1220 and executable on the processor 1200.
  • the program is executed by the processor 1200, the various processes of the embodiment of the resource selection method for a direct link applied to the first user device or to the second user device as described above are implemented, and the same technical effect can be achieved. In order to avoid repetition, it will not be repeated here.
  • the transceiver 1210 is used to receive and send data under the control of the processor 1200.
  • the bus architecture may include any number of interconnected buses and bridges, specifically Various circuits of one or more processors represented by processor 1200 and memory represented by memory 1220 are linked together.
  • the bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are all well known in the art and are therefore not further described herein.
  • the bus interface provides an interface.
  • the transceiver 1210 can be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium.
  • the user interface 1230 can also be an interface capable of externally connecting or internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 can store data used by the processor 1200 when performing operations.
  • the embodiment of the present disclosure also provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, each process of the resource selection method embodiment applicable to a direct link as described above is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here.
  • the computer-readable storage medium such as a read-only memory (Read-Only Memory, referred to as ROM), a random access memory (Random Access Memory, referred to as RAM), a disk or an optical disk, etc.
  • each component or each step can be decomposed and/or recombined.
  • These decompositions and/or recombinations should be regarded as equivalent schemes of the present invention.
  • the steps of performing the above-mentioned series of processing can be naturally performed in the order of description or in chronological order, but it is not necessary to perform them in chronological order, and some steps can be performed in parallel or independently of each other.
  • the purpose of the present disclosure can also be achieved by running a program or a group of programs on any computing device.
  • the computing device can be a well-known general-purpose device. Therefore, the purpose of the present disclosure can also be achieved by simply providing a program product containing program code that implements the method or device.
  • a program product also constitutes the present disclosure
  • a storage medium storing such a program product can also constitute the present disclosure.
  • the storage medium can be any well-known storage medium. media or any storage media developed in the future.

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Abstract

本公开提供了一种适用于直通链路的资源选择方法、装置及用户设备,涉及通信技术领域,该方法应用于第一用户设备,包括:在支持HARQ反馈的资源池中进行资源选择,其中,选择的资源用于PSCCH传输和PSSCH传输;PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:一次PSSCH传输对应M1次位于不同时间单元上的PSFCH传输;一次PSSCH传输最多对应M2次位于不同时间单元上的PSFCH传输;其中,M1、M2为配置或预配置的正整数,PSFCH用于承载HARQ反馈信息。

Description

一种适用于直通链路的资源选择方法、装置及用户设备
相关公开的交叉引用
本公开主张在2022年9月30日在中国提交的中国专利公开号No.202211214457.3的优先权,其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域,尤其是涉及一种适用于直通链路的资源选择方法、装置及用户设备。
背景技术
当前物理直通链路共享信道(Physical Sidelink Shared Channel,PSSCH)和物理直通链路反馈信道(Physical Sidelink Feedback Channel,PSFCH)之间都是一对一的对应关系,即一次PSSCH传输仅对应一次PSFCH反馈。在非授权频段的直通链路(Sidelink Operation on Unlicensed Spectrum,SL-U)的设计中,为了降低由于信道接入失败导致的PSFCH不能发送的问题,一次PSSCH传输可以对应多个不同时隙的PSFCH传输,即PSSCH和PSFCH是一对多的关系。然而,PSSCH和PSFCH一对多关系下的PSSCH资源选择机制是缺失的,如果两次连续PSSCH传输之间的时间间隔仍然按照相关技术执行,则两次PSSCH传输之间仅有一次PSFCH反馈机会,可能会导致过多的重传,造成资源浪费或者导致发送端在接收端未成功接收的情况下取消后续重传,造成数据包解码失败,与设计多次PSFCH反馈机会的初衷相违背。
发明内容
本公开的目的在于提供一种适用于直通链路的资源选择方法、装置及用户设备,从而解决PSSCH和PSFCH一对多关系下的PSSCH资源选择机制缺失的问题。
第一方面,为了达到上述目的,本公开实施例提供一种资源选择方法,应用于第一用户设备,所述方法包括:
在支持混合自动重传请求(Hybrid Automatic Repeat reQuest,HARQ)反馈的资源池中进行资源选择,其中,选择的资源用于物理直通链路控制信道PSCCH传输和物理直通链路共享信道PSSCH传输;所述PSSCH传输和物理直通链路反馈信道PSFCH传输之间的对应关系包括以下至少一项:
一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
其中,M1、M2为配置或预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
可选地,选择的用于所述PSSCH传输的资源满足以下至少一项要求:
任意两个用于所述PSSCH传输的资源之间的时间间隔大于或等于HARQ反馈时间;
直通链路控制信息(Sidelink Control Information,SCI)指示限制,用于限制所述SCI所指示的PSSCH传输资源所在的时间单元的范围。
可选地,所述HARQ反馈时间为第一时间长度和第二时间长度的和,其中:
所述第一时间长度为PSFCH接收和处理时间以及重传准备时间;
所述第二时间长度为以下任一项:
所述任意两个用于所述PSSCH传输的资源中的第一个资源的最后一个符号,和,用于所述PSSCH传输对应的M1次PSFCH传输中的最后一次PSFCH传输的资源的起始符号,之间的时间间隔;
所述任意两个用于所述PSSCH传输的资源中的第一个资源的最后一个符号,和,用于所述PSSCH传输对应的第N次PSFCH传输的资源的起始符号,之间的时间间隔,其中,N为小于或等于M2的正整数。
可选地,所述N为配置、预配置或根据以下至少一项确定:SCI最多指示的资源个数、SCI指示的资源个数、SCI指示资源之间的最大间隔、PSFCH配置的周期、PSSCH和对应的PSFCH之间的最小时间间隔、PSFCH接收和处理时间、重传准备时间、信道占用时间(Channel Occupancy Time,COT)。
可选地,所述在支持混合自动重传请求HARQ反馈的资源池中进行资源选择,包括:
在不能同时满足所述HARQ反馈时间和所述SCI指示限制的情况下,按照以下任一原则进行资源选择:
优先满足所述HARQ反馈时间;
优先满足所述SCI指示限制。
可选地,按照优先满足所述SCI指示限制的原则进行资源选择,包括:
调整所述PSSCH传输对应的所述PSFCH传输的次数,其中,所述PSSCH传输对应的所述PSFCH传输的次数为配置、预配置或根据以下至少一项确定:SCI最多指示的资源个数、SCI指示的资源个数、SCI指示资源之间的最大间隔、PSFCH配置的周期、PSSCH和对应的PSFCH之间的最小时间间隔、PSFCH接收和处理时间、重传准备时间、COT;
基于确定的所述PSSCH传输对应的所述PSFCH传输的次数,在所述资源池中进行资源选择。
可选地,所述方法还包括:
通过SCI指示所述PSFCH的相关信息,所述相关信息包括以下至少一项:
PSSCH对应的PSFCH的个数;
PSSCH对应的PSFCH的时域位置;
PSSCH对应的PSFCH的时频位置。
可选地,所述方法还包括:
在选择的用于PSCCH和PSSCH传输的资源上,发送所述PSCCH和PSSCH;
在所述PSSCH对应的PSFCH进行接收。
可选地,所述方法还包括以下任一项:
若成功接收到所述PSFCH承载的HARQ反馈信息,则根据所述HARQ反馈信息确定是否执行下一次所述PSSCH传输;
若未能成功接收到所述HARQ反馈信息,则在所述PSSCH对应的后续PSFCH的传输时刻继续进行HARQ反馈信息接收。
可选地,所述方法包括:
在未能成功接收到所述HARQ反馈信息,且所述PSSCH对应的至少一个PSFCH位于相邻的下一次所述PSSCH传输之后的情况下,不执行所述相邻的下一次PSSCH传输;或者,
在未能成功接收到所述HARQ反馈信息的情况下,执行所述相邻的下一次PSSCH传输。
第二方面,为了达到上述目的,本公开实施例提供一种适用于直通链路的资源选择方法,应用于第二用户设备,包括:
接收PSCCH和PSSCH;
在与PSSCH传输对应的PSFCH传输上进行HARQ反馈;
其中,所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
其中,M1、M2为配置或者预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
可选地,所述方法还包括:
在所述对应关系为一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输的情况下,根据接收到的SCI,获取所述PSSCH传输实际对应的PSFCH的相关信息,所述相关信息包括以下至少一项:
PSSCH对应的PSFCH的个数;
PSSCH对应的PSFCH的时域位置;
PSSCH对应的PSFCH的时频位置。
可选地,所述方法还包括:
在由于信道接入失败导致未能成功在第一PSFCH上发送HARQ反馈信息的情况下,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息;
基于所述第一资源,在所述第二PSFCH上发送所述HARQ反馈信息;
其中,所述第一PSFCH和所述第二PSFCH与同一个所述PSSCH对应,且所述第二PSFCH位于所述第一PSFCH之后。
可选地,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息,包括:
在满足第一条件的情况下,根据用于所述PSSCH传输的第二资源的时频位置信息,确定所述第一资源,且所述第二PSFCH承载的HARQ反馈信息与所述第一PSFCH承载的HARQ反馈信息相同;
其中所述第一条件包括以下任一项:
相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之后;
相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之前,且所述相邻的下一次PSSCH传输和所述第二PSFCH的传输时刻之间不满足HARQ限制条件。
可选地,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息,包括:
在相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之前,且所述相邻的下一次PSSCH传输和所述第二PSFCH的传输时刻之间不满足HARQ限制条件的情况下,执行以下任一项:
基于用于所述PSSCH传输的第二资源的时频位置信息,确定所述第一资源,且基于对所述PSSCH传输的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;
基于所述相邻的下一次PSSCH传输使用的第三资源的时频位置信息,确定所述第一资源,且基于所述相邻的下一次PSSCH传输的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;
基于所述第二PSFCH之前的Y次PSSCH传输的资源的时频位置,确定所述第一资源,且基于所述Y次PSSCH的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;其中,所述Y为配置或者预配置的正整数。
第三方面,为了达到上述目的,本公开实施例提供一种资源选择装置,应用于第一用户设备,包括:
选择模块,用于在支持HARQ反馈的资源池中进行资源选择,其中,选 择的资源用于PSCCH传输和PSSCH传输;所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
其中,M1和M2为配置或预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
第四方面,为了达到上述目的,本公开实施例提供一种直通链路资源选择装置,应用于第二用户设备,包括:
接收模块,用于接收PSCCH和PSSCH;
第一发送模块,用于在与PSSCH传输对应的PSFCH传输上进行HARQ反馈;
其中,所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
其中,M1、M2为配置或者预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
第五方面,为了达到上述目的,本公开实施例还提供一种用户设备,包括收发机、存储器、处理器及存储在所述存储器上并在所述处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现如第一方面所述的适用于直通链路的资源选择方法,或者,如第二方面所述的适用于直通链路的资源选择方法。
第六方面,为了达到上述目的,本公开实施例还提供一种计算机可读存储介质,其上存储有计算机程序,所述计算机程序被处理器执行时实现如第一方面所述的适用于直通链路的资源选择方法,或者,如第二方面所述的适 用于直通链路的资源选择方法。
本公开的上述技术方案至少具有如下有益效果:
本公开实施例的适用于直通链路的资源选择方法应用于第一用户设备,该方法包括在支持HARQ反馈的资源池中进行资源选择,其中,选择的资源用于PSCCH传输和PSSCH传输;所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;其中,M1、M2为配置或预配置的正整数,所述PSFCH用于承载HARQ反馈信息。如此,实现了在PSSCH与PSFCH为一对多的对应关系的情况下,为PSSCH传输选择的资源能够在任意两次PSSCH传输之间可以有多次PSFCH反馈机会,有效避免了由于信道接入失败导致的PSFCH无法发送的问题,而PSFCH无法发送将进一步可能导致过多的重传,造成资源浪费或者导致发送端在接收端未成功接收的情况下取消后续重传,造成数据包解码失败。
附图说明
图1为PSSCH与PSFC H的对应关系为一对一的示意图;
图2为本公开实施例的适用于直通链路的资源选择方法的流程示意图之一;
图3为本公开实施例的适用于直通链路的资源选择方法的流程示意图之二;
图4为本公开实施例中PSSCH与PSFCH的对应关系为一对二的示意图;
图5为本公开实施例中PSSCH与PSFCH的对应关系为一最多对二的示意图;
图6为本公开实施例中HARQ反馈时间与SCI指示限制不能同时满足时的资源选择示意图之一;
图7为本公开实施例中HARQ反馈时间与SCI指示限制不能同时满足时的资源选择示意图之二;
图8为本公开实施例的PSFCH反馈的示意图之一;
图9为本公开实施例的PSFCH反馈的示意图之二;
图10为本公开实施例的适用于直通链路的资源选择装置的结构示意图之一;
图11为本公开实施例的适用于直通链路的资源选择装置的结构示意图之二;
图12为本公开实施例的用户设备的结构示意图。
具体实施方式
为使本公开要解决的技术问题、技术方案和优点更加清楚,下面将结合附图及具体实施例进行详细描述。在下面的描述中,提供诸如具体的配置和组件的特定细节仅仅是为了帮助全面理解本公开的实施例。因此,本领域技术人员应该清楚,可以对这里描述的实施例进行各种改变和修改而不脱离本公开的范围和精神。另外,为了清楚和简洁,省略了对已知功能和构造的描述。
应理解,说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本公开的至少一个实施例中。因此,在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外,这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
在本公开的各种实施例中,应理解,下述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本公开实施例的实施过程构成任何限定。
在本公开所提供的实施例中,应理解,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
在进行本公开实施例的说明时,首先对相关技术点进行解释说明。
一、混合自动重传请求(Hybrid Automatic Repeat reQuest,HARQ)反馈机制
确认(Acknowledgement,ACK)/否定确认(Negative Acknowledgement, NACK)反馈:UE在接收到数据包后,如果成功解码数据包,则反馈ACK;如果未能成功解码数据包,则反馈NACK。这种反馈方式适用于单播和有连接的组播。优点是可以区分非连续发送(Discontinuous Transmission,DTX)状态,但是对于组播主要应用于组内UE较少的时候,因为每个接收UE都有独立的PSFCH资源。如果组内UE较多的时候,会出现PSFCH资源分配的问题。
NACK仅仅(only)反馈方式:这种方式适用于无连接的组播,所有的接收UE共享相同的PSFCH反馈资源,如果任何一个UE未能正确接收PSSCH,则在对应的PSFCH资源上发送HARQ NACK信息。这种方式的潜在问题是无法区分DTX和ACK的状态,因此当物理直通链路控制信道(Physical Sidelink Control Channel,PSSCH)检测错误时,发送(Transmission,TX)UE无法发现PSSCH传输错误。
二、PSFCH和PSSCH的对应关系
当前PSFCH资源的确定采用隐式的映射方式,且PSFCH和PSSCH之间为一对一的映射,即一个PSSCH仅对应一个时隙的PSFCH资源,映射方式包括:
方式1:基于关联的PSSCH的时隙编号以及起始的子信道的编号映射PSFCH候选资源;
方式2:基于关联的PSSCH的时隙编号以及PSSCH传输占用的子信道的编号映射PSFCH候选资源。
三、支持HARQ反馈(feedback)机制下的PSSCH资源选择
UE在进行资源选择时,任意两个资源之间的时间间隔应该大于或等于最小时间间隔Z,其中最小时间间隔包括两部分(Z=a+b),如图1所示:
a表示第一个资源(指的是上述任意两个资源之间的第一个资源)的PSSCH传输的最后一个符号和其对应的PSFCH接收的第一个起始符号之间的时间间隔;其中,该时间间隔根据高层参数sl-MinTimeGapPSFCH-r16(表示PSSCH和对应的PSFCH之间的最小时间差,取值可以为{2,3},单位为时隙)和高层参数sl-PSFCH-Period-r16(表示资源池内PSFCH资源配置的周期,取值可以为{0,1,2,4},单位为时隙;
b表示PSFCH接收和处理时间以及重传准备时间(包括物理信道复用以及TX-RX/RX-TX转换时间),其值取决于UE实现。
下面,结合附图对本公开实施例的适用于直通链路的资源选择方法、装置及用户设备进行详细说明。
如图2所示,本公开实施例提供一种适用于直通链路的资源选择方法,应用于第一用户设备,该方法包括:
步骤201,在支持HARQ反馈的资源池中进行资源选择,其中,选择的资源用于PSCCH传输和PSSCH传输;所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
其中,M1、M2为配置或预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
这里,需要说明的是,第一,PSCCH用于传输直通链路调度信息,即:PSCCH用于传输PSSCH的调度信息;第二,本公开实施例中,该时间单元可以为子帧、时隙等时间粒度;第三,M1和M2可以相同或不同。
本公开实施例的适用于直通链路的资源选择方法中,第一用户设备在支持HARQ反馈的资源池中选择用于PSCCH传输和PSSCH传输的资源;其中,PSSCH传输和与PSSCH传输对应的PSFCH传输之间的对应关系包括以下至少一项:一次PSSCH传输对应M1次位于不同时间单元上的PSFCH传输;一次PSSCH传输最多对应M2次位于不同时间单元上的PSFCH传输;其中,M1、M2为配置或预配置的正整数,PSFCH用于承载HARQ反馈信息。如此,实现了为PSSCH传输选择的资源能够在PSSCH与PSFCH为一对多的对应关系时,相邻两次PSSCH传输之间可以有多次PSFCH反馈机会,从而有效避免了由于信道接入失败导致的PSFCH无法发送的问题,以及,PSFCH无法发送将进一步可能导致过多的重传,造成资源浪费或者导致发送端在接收端未成功接收的情况下取消后续重传,造成数据包解码失败。
作为一个可选的实现方式,本公开实施例中,选择的用于所述PSSCH传输的资源满足以下至少一项要求:
(1)任意两个用于所述PSSCH传输的资源之间的时间间隔大于或等于HARQ反馈时间;
这里,需要说明的是,本可选实现方式中,任意两个PSSCH传输属于同一个传输块(Transport Block,TB);也就是说,同一TB中的任意两个PSSCH传输之间的时间间隔应大于或等于HARQ反馈时间。
(2)直通链路控制信息(Sidelink Control Information,SCI)指示限制,用于限制所述SCI所指示的PSSCH传输资源所在的时间单元的范围,即,该SCI指示限制所指示的资源需要在32个时隙之内。这里对所指示的资源进行进一步的解释,SCI所指示的资源包括当前传输(当前传输指的是该SCI所对应的传输)以及通过时域资源指示数值(Time Resource Indicator Value,TRIV)/频域资源指示数值(Frequency Resource Indicator Value,FRIV)所指示的后续传输的资源。例如,SCI所指示的资源个数为3,即表示当前传输和后续的两次重传需要在32个时隙之内。
这里,需要说明的是,用于PSSCH传输的资源即为PSSCH传输资源。
作为一个具体的实现方式,所述HARQ反馈时间为第一时间长度和第二时间长度的和;其中:
所述第一时间长度为PSFCH接收和处理时间以及重传准备时间;也就是说,该第一时间长度包括第一用户设备接收和处理PSFCH的时间以及重传PSSCH的准备时间,即:第一时间长度为接收和处理PSFCH的时间与重传PSSCH的准备时间的和;
所述第二时间长度为以下任一项:
所述任意两个用于所述PSSCH传输的资源中的第一个资源的最后一个符号,和,用于所述PSSCH传输对应的M1次PSFCH传输中的最后一次PSFCH传输的资源的起始符号,之间的时间间隔;
所述任意两个用于所述PSSCH传输的资源中的第一个资源的最后一个符号,和,用于所述PSSCH传输对应的第N次PSFCH传输的资源的起始符号,之间的时间间隔,其中,N为小于或等于M2的正整数。
下面,结合具体示例,对本具体实施例中的HARQ反馈时间进行说明:
示例一:一次PSSCH传输对应M1次位于不同时间单元上的PSFCH传输
如图4所示,一次PSSCH传输对应两次PSFCH传输,且两次PSFCH传输为连续的两次PSFCH传输。第一用户设备在确定第一次PSFCH传输的资源时,需要考虑PSSCH和对应的PSFCH之间的最小时间要求。即第一个PSFCH为满足最小时间要求的最近的PSFCH(如图4中的“a”所表示的时间间隔大于或等于该最小时间要求)。PSCCH/PSSCH的重传,与,PSCCH/PSSCH的初传所对应的第二个PSFCH,之间的时间间隔(如图4中的“b”所代表的时间间隔),需要保证PSFCH接收和处理时间(接收和处理PSFCH的时间)以及,重传准备时间(PSCCH/PSSCH为重传做准备的时间),即:PSCCH/PSSCH的重传,与,PSCCH/PSSCH的初传所对应的第二个PSFCH,之间的时间间隔,应大于或等于PSFCH接收和处理时间以及重传准备时间之和。
示例二:一次PSSCH传输最多对应M2次位于不同时间单元上的PSFCH传输
如图5所示,一次PSSCH传输最多对应2次PSFCH传输,其中,初传的PSSCH对应两次PSFCH传输(即N为2),因此,第一次重传需要位于初传对应的第二个PSFCH之后,且初传对应的第二个PSFCH与第一次重传PSSCH之间的时间间隔(图5中初传对应的第二次PSFCH传输和第一次重传之间的“b”表示的时间间隔)需要保证PSFCH接收和处理的时间以及重传准备时间;初传PSSCH的资源中的最后一个字符与初传PSSCH对应的两次PSFCH传输的资源中的起始符号之间的时间间隔(例如,图5中初传和第一次PSFCH传输之间的“a”表示的时间间隔)应满足最小时间间隔要求,该最小时间间隔要求可以基于高层参数确定;
第一次PSSCH重传对应一次PSFCH传输(即N为1),因此,两次重传之间的间隔需要保证相关技术中的时间要求;具体的,第一次PSSCH重传的资源的最后一个字符,和与第一次PSSCH重传对应的PSFCH传输的第一个字符之间的时间间隔(图5的“a”表示的时间间隔)应满足最小时间间隔 要求,如前所述,该最小时间间隔要求可以基于高层参数确定;第二次PSSCH重传,和,第一次PSSCH重传对应的PSFCH之间的时间间隔(图5中的“b”表示的时间间隔),需要保证PSFCH接收和处理的时间以及重传准备时间。
另外,还需要说明的是,接收和处理PSFCH的时间以及PSSCH重传准备时间的最小值(第一时间长度)应取决于终端实现,其中,接收和处理PSFCH的时间以及PSSCH重传准备时间包括:物理信道复用以及由发送到接收(TX-RX)/接收到发送(RX-TX)转换时间等。
作为一个可选的实现方式,所述N为配置、预配置或根据以下至少一项确定:SCI最多指示的资源个数、SCI指示的预源个数、SCI指示资源之间的最大间隔、PSFCH配置的周期、PSSCH和对应的PSFCH之间的最小时间间隔(可以为:PSSCH传输的资源的最后一个字符与PSSCH对应的第一个PSFCH传输的资源的第一个字符之间的最小时间间隔)、PSFCH接收和处理时间(接收和处理PSFCH的时间)、重传准备时间(为重传做准备的时间)、信道占用时间(Channel Occupied Time,COT)。
下面,结合具体的示例对N的确定过程进行说明:
例如,确定的COT的最大时长为10个时隙(slot)且PSFCH配置的周期为4个slot,为了保证PSFCH传输和PSSCH传输位于相同的COT内,则N最大配置为2,即一个PSSCH传输最多对应两次PSFCH传输。
再例如,SCI最大指示资源的个数为3且实际指示的资源个数也会3,为了保证初传和重传位于32个时隙之内,假设PSFCH的周期为4个slot,则每个PSSCH最多对应3次PSFCH传输。
作为一个可选的实现方式,步骤201,在支持混合自动重传请求HARQ反馈的资源池中进行资源选择,包括:
在不能同时满足所述HARQ反馈时间和所述SCI指示限制的情况下,按照以下任一原则进行资源选择:
优先满足所述HARQ反馈时间;
优先满足所述SCI指示限制。
也就是说,在支持HARQ反馈的资源池中为PSCCH/PSSCH的传输选择资源时,若一个TB所对应的PSSCH传输的资源之间的时间间隔需要同时考 虑HARQ反馈时间和SCI指示限制,但是,HARQ反馈时间和SCI指示限制无法同时满足的情况下,在进行资源选择时,可以优先满足HARQ反馈时间,即任意两次PSSCH传输之间的时间间隔满足配置、预配置或预先定义的HARQ反馈时间;也可以优先满足SCI指示的限制,即保证SCI指示的资源位于配置、预配置或预先定义的时间单元范围(如32个时隙)内。
作为一个具体的实现方式,按照优先满足所述SCI指示限制的原则进行资源选择,包括:
调整所述PSSCH传输对应的所述PSFCH传输的次数,其中,所述PSSCH传输对应的所述PSFCH传输的次数为配置、预配置或根据以下至少一项确定:SCI最多指示的资源个数、SCI指示的资源个数、SCI指示资源之间的最大间隔、PSFCH配置的周期、PSSCH和对应的PSFCH之间的最小时间间隔、PSFCH接收和处理时间、重传准备时间、COT;
基于确定的所述PSSCH传输对应的所述PSFCH传输的次数,在所述资源池中进行资源选择。
例如,一次PSSCH传输与K次PSFCH传输对应,其中,配置或预配置的K为小于或等于M2的正整数,其中,K可以基于上述至少一个因素确定,作为一个特例,K可以仅配置或预配置为1。
下面,结合具体示例对资源选择考虑HARQ反馈和SCI指示限制进行说明:
资源池中配置的SCI指示的资源最大预约个数为3。如图6所示,PSFCH的配置周期为4,则1个PSSCH对应3个相邻且位于不同时隙的PSFCH。因此如果按照PSSCH和PSFCH为1对3的关系进行资源选择,初传和重传之间的时间间隔大于SCI最大指示间隔(32个时隙)。因此,这种情况下,为了满足SCI指示限制,可以初传仅指示第一次重传,第一次重传仅指示第二次重传。
另外,针对不能同时满足所述HARQ反馈时间和所述SCI指示限制的情况,还可以基于SCI指示的资源中的部分PSSCH传输的资源之间满足HARQ反馈时间限制,且SCI所指示的资源满足SCI指示的限制。示例性地,资源池中配置的SCI指示的资源最大预约个数为3。为了保证SCI尽量多的指示 预约资源,如前所述,如果都按照重传位于前一次传输所对应的所有PSFCH之后,则无法保证初传可以指示3个资源。这种情况下,如图7所示,可以使得初传PSSCH和3个PSFCH对应,为了降低传输之间的间隔,第一次PSSCH重传和两个PSFCH对应,从而保证初传和重传位于SCI指示限制的时间单元的范围(如32个时隙)内。
进一步地,作为一个可选的实现方式,所述方法还包括:
通过SCI指示所述PSFCH的相关信息,所述相关信息包括以下至少一项:
PSSCH对应的PSFCH的个数;
PSSCH对应的PSFCH的时域位置;
PSSCH对应的PSFCH的时频位置。
具体的,可以通过在SCI中增加指示域,以在该指示域中携带上述PSFCH的相关信息。
作为一个具体的实现方式,所述SCI为以下任一项:
第一阶段直通链路控制信息1st-stage SCI,所述1st-stage SCI承载于PSCCH;
第二阶段直通链路控制信息2nd-stage SCI,所述2nd-stage SCI承载于PSSCH。
进一步地,作为一个具体的实现方式,所述方法还包括:
在选择的用于PSSCH传输的资源上,发送所述PSCCH和PSSCH;
在所述PSSCH对应的PSFCH进行接收,本步骤具体为:在所述PSSCH对应的多个PSFCH中的依次进行接收,直至成功接收到HARQ反馈信息。
作为一个可选的实现方式,所述方法还包括以下任一项:
若成功接收到所述PSFCH承载的HARQ反馈信息,则根据所述HARQ反馈信息确定是否执行下一次所述PSSCH传输;具体的,若HARQ反馈信息为ACK,则取消后续重传,若HARQ反馈信息为NACK,则继续执行下一次PSSCH传输;
若未能成功接收到所述HARQ反馈信息,则在所述PSSCH对应的后续PSFCH的传输时刻继续进行HARQ反馈信息接收;这里,需要说明的是,本步骤中的“后续PSFCH”为:所述PSSCH对应的多个PSFCH中,位于承载 未能成功接收到的HARQ反馈信息的PSFCH之后的PSFCH。
进一步地,作为一个可选的实现方式,所述方法还包括以下任一项:
(1)在未能成功接收到所述HARQ反馈信息,且所述PSSCH对应的至少一个PSFCH(例如,所述PSSCH对应的最后一个PSFCH)位于相邻的下一次所述PSSCH传输之后的情况下,不执行所述相邻的下一次PSSCH传输;
也就是说,本可选的实现方式中,若本次PSSCH传输对应的至少一个PSFCH位于相邻的下一次PSSCH传输之后,且在所述相邻的下一次PSSCH传输的时刻到达时,若没有成功接收到与本次PSSCH传输对应的HARQ反馈信息,则可以不执行所述相邻的下一次PSSCH传输,以等待接收与本次PSSCH传输对应的后续的PSFCH,以图8为例,一个TB的3次PSSCH传输的资源满足相关技术中的传输间隔的限制。初传位于m0时隙,其对应两次PSFCH反馈时刻。第一用户设备在m1时刻接收反馈信息,可能的情况如下:
接收到ACK:取消本TB的后续传输;
接收到NACK:继续在m2时刻进行PSSCH重传;
未接收到反馈信息:因为第二次传输(第一次PSSCH重传)位于第一次PSSCH传输对应的第二个PSFCH之前,因此,取消在m2时刻的第一次PSSCH重传;
其中,在由于未接收到反馈信息而取消在m2时刻的第一次PSSCH重传的情况下,第二用户设备可以在m2时刻继续接收PSFCH;若在m2时刻接收到ACK信息,则取消后续传输;若接收到NACK信息或没有接收到反馈信息,则在m3时刻继续第二次PSSCH重传。
(2)在未能成功接收到所述HARQ反馈信息的情况下,执行所述相邻的下一次PSSCH传输;也就是说,第一用户设备在未能成功接收到HARQ反馈信息的情况下,不用继续等待该次PSSCH传输对应的后续PSFCH的传输,这样可以降低传输时延。需要强调的是,这里所说的执行所述相邻的下一次PSSCH传输,仅表示第一用户设备可以执行该操作,但还需考虑下一次PSSCH传输之前是否接收到另一次的PSFCH传输。例如,第一用户设备在第一次PSSCH传输之后,第二次PSSCH传输之前有两次PSFCH的接收机会 (针对的是第一次PSSCH传输的HARQ反馈信息),第一用户设备在第一次PSFCH接收时刻未接收到HARQ反馈信息,然后第一用户设备还可以在第二次PSFCH接收时刻继续接收HARQ反馈信息,如果这个时候仍未接收到HARQ反馈信息,则第一用户设备可以执行第二次PSSCH传输。但是如果第一用户设备在第一次PSSCH传输之后,第二次PSSCH传输之前仅有一次PSFCH传输,且在对应的时刻未接收到HARQ反馈信息,则可以直接执行第二次PSSCH传输。即,第一用户设备基于第一次PSSCH传输和第二次PSSCH传输之间的所有PSFCH时刻是否接收到HARQ反馈信息的情况,确定是否执行第二次PSSCH传输。
进一步地,还需要说明的是,若第一用户设备继续后续PSSCH重传,但是,由于没有接收到反馈信息而触发的重传次数需要小于或等于配置或预配置的第一数值。
如图3所示,本公开实施例还提供一种适用于直通链路的资源选择方法,应用于第二用户设备,包括:
步骤301,接收PSCCH和PSSCH;具体的,本步骤为接收第一用户设备发送的PSCCH和PSSCH,更具体的是,可以接收第一用户设备发送的PSSCH,或者,接收第一用户设备发送的PSCCH和PSSCH;
步骤302,在与PSSCH传输对应的PSFCH传输上进行HARQ反馈;
其中,所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
其中,M1、M2为配置或者预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
本公开实施例的适用于直通链路的资源选择方法,第二用户设备首先接收PSCCH和PSSCH,然后,在与PSSCH传输对应的多个PSFCH传输上进行HARQ反馈,如此,实现了相邻两次PSSCH传输之间可以有多次PSFCH 反馈机会,有效避免了由于信道接入失败导致的PSFCH无法发送的问题,进一步避免了由于PSFCH无法发送可能导致过多的重传,造成资源浪费或者导致发送端在接收端未成功接收的情况下取消后续重传,造成数据包解码失败。
进一步地,作为一个可选的实现方式,所述方法还包括:
在所述对应关系为一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输的情况下,根据接收到的SCI,获取所述PSSCH传输实际对应的PSFCH的相关信息,所述相关信息包括以下至少一项:
PSSCH对应的PSFCH的个数;
PSSCH对应的PSFCH的时域位置;
PSSCH对应的PSFCH的时频位置。
本可选实现方式中,基于获取的相关信息能够确定与所述PSSCH传输实际对应的PSFCH的传输位置,以在PSFCH的传输位置上进行HARQ反馈。
作为一个可选的实现方式,进一步地,所述方法还包括:
在由于信道接入失败导致未能成功在第一PSFCH上发送HARQ反馈信息的情况下,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息;
基于所述第一资源,在所述第二PSFCH上发送所述HARQ反馈信息;
其中,所述第一PSFCH和所述第二PSFCH与同一个所述PSSCH对应,且所述第二PSFCH位于所述第一PSFCH之后。
这里,需要说明的是,本可选实现方式中,在第二PSFCH上发送所述HARQ反馈信息,具体为在信道接入成功的情况下,在第二PSFCH上发送所述HARQ反馈信息;即:在第二PSFCH上发送HARQ反馈信息的前提为第二用户设备已信道接入成功。
作为一个可选的实现方式,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息,包括:
在满足第一条件的情况下,根据用于所述PSSCH传输的第二资源的时频位置确定所述第一资源,且所述第二PSFCH承载的HARQ反馈信息与所述第一PSFCH承载的HARQ反馈信息相同;
其中所述第一条件包括以下任一项:
相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之后;
相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之前,且所述第一资源和所述第二资源不满足HARQ限制条件。
这里,需要说明的是,本可选实现方式中,一者,所述PSSCH传输指的是本次PSSCH传输;二者,所述第一资源具体为所述第二PSFCH传输的频域资源;三者,HARQ反馈限制条件为前述的相关技术中的“a”所表示的时间长度,或者可以理解为考虑到PSSCH和PSFCH的之间的最小时间间隔要求,在所述第二PSFCH的传输时刻无法发送所述相邻的下一次PSSCH所对应的HARQ反馈信息;因此,本可选实施例具体为:在时域上,若相邻的下一次PSSCH传输位于第二PSFCH的传输时刻之后,或者,在时域上,相邻的下一次PSSCH传输位于第二PSFCH的传输时刻之前且两者的时间间隔不满足HARQ限制条件时,基于本次PSSCH传输所使用的第二资源的时频位置信息,确定所述第二PSFCH的频域资源,且确定第二PSFCH承载的HARQ反馈信息与第一PSFCH承载的HARQ反馈信息相同。
作为另一个可选的实现方式,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息,包括:
在相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之前,且所述相邻的下一次PSSCH传输和所述第二PSFCH的传输时刻之间满足HARQ限制条件的情况下,执行以下任一项:
基于用于所述PSSCH传输的第二资源的时频位置信息,确定所述第一资源,且基于对所述PSSCH传输的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;
基于所述相邻的下一次PSSCH传输使用的第三资源的时频位置信息,确定所述第一资源,且基于所述相邻的下一次PSSCH传输的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;
基于所述第二PSFCH之前的Y次PSSCH传输的资源的时频位置,确定所述第一资源,且基于所述Y次PSSCH的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;其中,所述Y为配置或者预配置的正整数。
同样的,本可选实现方式中,一者,所述PSSCH传输指的是本次PSSCH 传输;二者,所述第一资源具体为所述第二PSFCH传输的频域资源。
这里,需要说明的是,针对本可选的实现方式,第一,HARQ反馈限制条件为前述的相关技术中的“a”所表示的时间长度;第二,在本次PSSCH传输和本次PSSCH传输对应的第二PSFCH之间满足HARQ反馈限制时,第二用户设备可以基于本次PSSCH传输的解码结果及其时频位置,在第二PSFCH的反馈时刻进行HARQ反馈;或者,基于相邻的下一次PSSCH传输所使用的资源的时频位置及其解码结果,在在第二PSFCH的反馈时刻进行HARQ反馈;或者,基于已执行的前Y次PSSCH传输所使用的各个资源的时频位置及对应的解码结果,在在第二PSFCH的反馈时刻进行HARQ反馈,此时第二PSFCH承载多个HARQ反馈信息,其中,Y次PSSCH传输中的每一个PSSCH传输对应一个HARQ反馈信息;第五,Y可以为小于或等于M1的正整数,和/或,小于或等于M2的正整数;特殊地,Y可以为2。
下面结合图9,对上述两个可选的实现方式进行具体说明:
如图9所示,发送端按照相关技术中时间要求限制进行资源选择,每次传输对应两次PSFCH传输。在第一次PSSCH传输之后,接收端根据PSSCH的解码结果确定HARQ反馈信息,但是由于信道接入失败,第一次PSFCH发送时刻未能发送HARQ反馈信息,然后发送端因为没有接收到任何反馈信息,会进行第二次PSSCH发送(即重传),而接收端的处理方法可能包括:
处理方法一:接收端在初传的时候已经解码成功,则不再需要对重传进行接收或者解码,直接在第二次PSFCH发送时刻发送的HARQ反馈信息,且反馈信息为ACK,且基于初传的时频信息选择第二次PSFCH发送时刻的发送资源;
处理方法二:接收端在初传的时候未解码成功,则需要对重传继续解码,然后根据重传的解码结果确定第二次PSFCH发送时刻发送的HARQ反馈信息,且基于重传的时频信息选择第二次PSFCH发送时刻的发送资源;
处理方法三:接收端在初传的时候未解码成功,则需要对重传继续解码,然后在第二次PSFCH发送时刻同时发送初传对应的HARQ反馈信息和重传对应的HARQ反馈信息,且基于初传和重传的时频信息分别选择第二次PSFCH发送时刻的发送资源。
本公开实施例的上述适用于直通链路的资源选择方法,可以保证一次PSSCH传输对应多次PSFCH反馈,一方面,能够缓解由于信道接入失败导致的PSFCH不能发送的情况,从而避免由于PSFCH不能发送导致的如下问题:第一,对于NACK only的反馈方式,如果由于信道接入失败导致NACK不能发送,发送端用户设备(第一用户设备)会认为接收端用户设备(第二用户设备)已经接收成功,从而不再进行重传,而实际接收端并没有接收成功。第二,对于ACK/NACK的反馈方式,如果接收端用户设备不发送任何反馈信息,发送端用户设备可以认为是未接收成功的状态,从而导致不必要的传输;另一方面,基于动态调整PSFCH传输个数的方式,可以同时保证多次PSFCH传输的情况下,尽可能的降低传输时延以及增加SCI指示资源的个数;第三方面,本公开实施例中的HARQ反馈的方式,可以保证接收端用户设备更充分地利用多次PSFCH反馈机会,降低的不必要的重传。
这里,需要说明的是,本公开实施例中所提到的执行PSSCH传输、执行PSFCH传输、发送PSSCH、发送PSFCH等均是指用户设备在信道接入成功的前提下执行的操作。
如图10所示,本公开实施例还提供一种适用于直通链路的资源选择装置,应用于第一用户设备,包括:
选择模块1001,用于在支持HARQ反馈的资源池中进行资源选择,其中,选择的资源用于PSCCH传输和PSSCH传输;所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
其中,M1和M2为配置或预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
可选地,选择的用于所述PSSCH传输的资源满足以下至少一项要求:
任意两个用于所述PSSCH传输的资源之间的时间间隔大于或等于HARQ反馈时间;
直通链路控制信息SCI指示限制,用于限制所述SCI所指示的PSSCH传输资源所在的时间单元的范围。
可选地,所述HARQ反馈时间为第一时间长度和第二时间长度的和,其中:
所述第一时间长度为PSFCH接收和处理时间以及重传准备时间;
所述第二时间长度为以下任一项:
所述任意两个用于所述PSSCH传输的资源中的第一个资源的最后一个符号,和,用于所述PSSCH传输对应的M1次PSFCH传输中的最后一次PSFCH传输的资源的起始符号,之间的时间间隔;
所述任意两个用于所述PSSCH传输的资源中的第一个资源的最后一个符号,和,用于所述PSSCH传输对应的第N次PSFCH传输的资源的起始符号,之间的时间间隔,其中,N为小于或等于M2的正整数。
可选地,所述N为配置、预配置或根据以下至少一项确定:SCI最多指示的资源个数、SCI指示的资源个数、SCI指示资源之间的最大间隔、PSFCH配置的周期、PSSCH和对应的PSFCH之间的最小时间间隔、PSFCH接收和处理时间、重传准备时间、信道占用时间COT。
可选地,所述选择模块1001具体用于:
在不能同时满足所述HARQ反馈时间和所述SCI指示限制的情况下,按照以下任一原则进行资源选择:
优先满足所述HARQ反馈时间;
优先满足所述SCI指示限制。
可选地,所述选择模块1001在用于按照优先满足所述SCI指示限制的原则进行资源选择时,具体用于:
调整所述PSSCH传输对应的所述PSFCH传输的次数,其中,所述PSSCH传输对应的所述PSFCH传输的次数为配置、预配置或根据以下至少一项确定:SCI最多指示的资源个数、SCI指示的资源个数、SCI指示资源之间的最大间隔、PSFCH配置的周期、PSSCH和对应的PSFCH之间的最小时间间隔、PSFCH接收和处理时间、重传准备时间、COT;
基于确定的所述PSSCH传输对应的所述PSFCH传输的次数,在所述资 源池中进行资源选择。
可选地,所述装置还包括:
指示模块,用于通过SCI指示所述PSFCH的相关信息,所述相关信息包括以下至少一项:
PSSCH对应的PSFCH的个数;
PSSCH对应的PSFCH的时域位置;
PSSCH对应的PSFCH的时频位置。
可选地,所述SCI为以下任一项:
第一阶段直通链路控制信息1st-stage SCI,所述1st-stage SCI承载于PSCCH;
第二阶段直通链路控制信息2nd-stage SCI,所述2nd-stage SCI承载于PSSCH。
进一步地,所述装置还包括:
发送模块,用于在选择的用于PSCCH和PSSCH传输的资源上,发送所述PSCCH和PSSCH;
接收模块,用于在所述PSSCH对应的PSFCH进行接收。
进一步地,所述装置还包括:
第一处理模块,用于执行以下至少一项:
若成功接收到所述PSFCH承载的HARQ反馈信息,则根据所述HARQ反馈信息确定是否执行下一次所述PSSCH传输;
若未能成功接收到所述HARQ反馈信息,则在所述PSSCH对应的后续PSFCH的传输时刻继续进行HARQ反馈信息接收。
进一步地,所述装置还包括:
第二处理模块,用于执行以下任一项:
在未能成功接收到所述HARQ反馈信息,且所述PSSCH对应的至少一个PSFCH位于相邻的下一次所述PSSCH传输之后的情况下,不执行所述相邻的下一次PSSCH传输;
在未能成功接收到所述HARQ反馈信息的情况下,执行所述相邻的下一次PSSCH传输。
如图11所示,本公开实施例还提供一种适用于直通链路的资源选择装置,应用于第二用户设备,包括:
接收模块1101,用于接收PSCCH和PSSCH;
第一发送模块1102,用于在与PSSCH传输对应的PSFCH传输上进行HARQ反馈;
其中,所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
其中,M1、M2为配置或者预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
进一步地,所述装置还包括:
获取模块,用于在所述对应关系为一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输的情况下,根据接收到的SCI,获取所述PSSCH传输实际对应的PSFCH的相关信息,所述相关信息包括以下至少一项:
PSSCH对应的PSFCH的个数;
PSSCH对应的PSFCH的时域位置;
PSSCH对应的PSFCH的时频位置。
进一步地,所述装置还包括:
确定模块,用于在由于信道接入失败导致未能成功在第一PSFCH上发送HARQ反馈信息的情况下,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息;
第二发送模块,用于基于所述第一资源,在所述第二PSFCH上发送所述HARQ反馈信息;
其中,所述第一PSFCH和所述第二PSFCH与同一个所述PSSCH对应,且所述第二PSFCH位于所述第一PSFCH之后。
可选地,所述确定模块具体用于:
在满足第一条件的情况下,根据用于所述PSSCH传输的第二资源的时频位置信息,确定所述第一资源,且所述第二PSFCH承载的HARQ反馈信息与所述第一PSFCH承载的HARQ反馈信息相同;
其中所述第一条件包括以下任一项:
相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之后;
相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之前,且所述相邻的下一次PSSCH传输和所述第二PSFCH的传输时刻之间不满足HARQ限制条件。
可选地,所述确定模块具体用于:
在相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之前,且所述相邻的下一次PSSCH传输和所述第二PSFCH的传输时刻之间满足HARQ限制条件的情况下,执行以下任一项:
基于用于所述PSSCH传输的第二资源的时频位置信息,确定所述第一资源,且基于对所述PSSCH传输的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;
基于所述相邻的下一次PSSCH传输使用的第三资源的时频位置信息,确定所述第一资源,且基于所述相邻的下一次PSSCH传输的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;
基于所述第二PSFCH之前的Y次PSSCH传输的资源的时频位置,确定所述第一资源,且基于所述Y次PSSCH的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;其中,所述Y为配置或者预配置的正整数。
如图12所示,本公开实施例还提供一种用户设备,包括:处理器1200,存储器1220及存储在所述存储器1220上并可在所述处理器1200上运行的程序,所述程序被所述处理器1200执行时实现如上所述的应用于第一用户设备或应用于第二用户设备的适用于直通链路的资源选择方法的实施例的各个过程,且能达到相同的技术效果,为了避免重复,这里不再赘述。
所述收发机1210,用于在处理器1200的控制下接收和发送数据。
其中,在图12中,总线架构可以包括任意数量的互联的总线和桥,具体 由处理器1200代表的一个或多个处理器和存储器1220代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机1210可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口1230还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1200负责管理总线架构和通常的处理,存储器1220可以存储处理器1200在执行操作时所使用的数据。
另外,本公开实施例还提供一种计算机可读存储介质,可读存储介质上存储有程序,该程序被处理器执行时实现如上所述的适用于直通链路的资源选择方法实施例的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。其中,该计算机可读存储介质,如只读存储器(Read-Only Memory,简称ROM)、随机存取存储器(Random Access Memory,简称RAM)、磁碟或者光盘等。
此外,需要指出的是,在本公开的装置和方法中,显然,各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且,执行上述系列处理的步骤可以自然地按照说明的顺序或按时间顺序执行,但是并不需要一定按照时间顺序执行,某些步骤可以并行或彼此独立地执行。对本领域的普通技术人员而言,能够理解本公开的方法和装置的全部或者任何步骤或者部件,可以在任何计算装置(包括处理器、存储介质等)或者计算装置的网络中,以硬件、固件、软件或者它们的组合加以实现,这是本领域普通技术人员在阅读了本公开的说明的情况下运用他们的基本编程技能就能实现的。
因此,本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此,本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说,这样的程序产品也构成本公开,并且存储有这样的程序产品的存储介质也能构成本公开。显然,所述存储介质可以是任何公知的存储 介质或者将来所开发出来的任何存储介质。
最后,还需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者终端设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述是本公开的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本公开所述原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本公开的保护范围。

Claims (19)

  1. 一种适用于直通链路的资源选择方法,应用于第一用户设备,所述方法包括:
    在支持混合自动重传请求HARQ反馈的资源池中进行资源选择,其中,选择的资源用于物理直通链路控制信道PSCCH传输和物理直通链路共享信道PSSCH传输;所述PSSCH传输和物理直通链路反馈信道PSFCH传输之间的对应关系包括以下至少一项:
    一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
    一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
    其中,M1、M2为配置或预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
  2. 根据权利要求1所述的方法,其中,选择的用于所述PSSCH传输的资源满足以下至少一项要求:
    任意两个用于所述PSSCH传输的资源之间的时间间隔大于或等于HARQ反馈时间;
    直通链路控制信息SCI指示限制,用于限制所述SCI所指示的PSSCH传输资源所在的时间单元的范围。
  3. 根据权利要求2所述的方法,其中,所述HARQ反馈时间为第一时间长度和第二时间长度的和,其中:
    所述第一时间长度为PSFCH接收和处理时间以及重传准备时间;
    所述第二时间长度为以下任一项:
    所述任意两个用于所述PSSCH传输的资源中的第一个资源的最后一个符号,和,用于所述PSSCH传输对应的M1次PSFCH传输中的最后一次PSFCH传输的资源的起始符号,之间的时间间隔;
    所述任意两个用于所述PSSCH传输的资源中的第一个资源的最后一个符号,和,用于所述PSSCH传输对应的第N次PSFCH传输的资源的起始符 号,之间的时间间隔,其中,N为小于或等于M2的正整数。
  4. 根据权利要求3所述的方法,其中,所述N为配置、预配置或根据以下至少一项确定:SCI最多指示的资源个数、SCI指示的资源个数、SCI指示资源之间的最大间隔、PSFCH配置的周期、PSSCH和对应的PSFCH之间的最小时间间隔、PSFCH接收和处理时间、重传准备时间、信道占用时间COT。
  5. 根据权利要求2所述的方法,其中,所述在支持混合自动重传请求HARQ反馈的资源池中进行资源选择,包括:
    在不能同时满足所述HARQ反馈时间和所述SCI指示限制的情况下,按照以下任一原则进行资源选择:
    优先满足所述HARQ反馈时间;
    优先满足所述SCI指示限制。
  6. 根据权利要求5所述的方法,其中,按照优先满足所述SCI指示限制的原则进行资源选择,包括:
    调整所述PSSCH传输对应的所述PSFCH传输的次数,其中,所述PSSCH传输对应的所述PSFCH传输的次数为配置、预配置或根据以下至少一项确定:SCI最多指示的资源个数、SCI指示的资源个数、SCI指示资源之间的最大间隔、PSFCH配置的周期、PSSCH和对应的PSFCH之间的最小时间间隔、PSFCH接收和处理时间、重传准备时间、COT;
    基于确定的所述PSSCH传输对应的所述PSFCH传输的次数,在所述资源池中进行资源选择。
  7. 根据权利要求1所述的方法,其中,所述方法还包括:
    通过SCI指示所述PSFCH的相关信息,所述相关信息包括以下至少一项:
    PSSCH对应的PSFCH的个数;
    PSSCH对应的PSFCH的时域位置;
    PSSCH对应的PSFCH的时频位置。
  8. 根据权利要求1所述的方法,其中,所述方法还包括:
    在选择的用于PSCCH和PSSCH传输的资源上,发送所述PSCCH和PSSCH;
    在所述PSSCH对应的PSFCH进行接收。
  9. 根据权利要求8所述的方法,其中,所述方法还包括以下任一项:
    若成功接收到所述PSFCH承载的HARQ反馈信息,则根据所述HARQ反馈信息确定是否执行下一次所述PSSCH传输;
    若未能成功接收到所述HARQ反馈信息,则在所述PSSCH对应的后续PSFCH的传输时刻继续进行HARQ反馈信息接收。
  10. 根据权利要求8所述的方法,其中,所述方法包括:
    在未能成功接收到所述HARQ反馈信息,且所述PSSCH对应的至少一个PSFCH位于相邻的下一次所述PSSCH传输之后的情况下,不执行所述相邻的下一次PSSCH传输;或者,
    在未能成功接收到所述HARQ反馈信息的情况下,执行所述相邻的下一次PSSCH传输。
  11. 一种适用于直通链路的资源选择方法,应用于第二用户设备,包括:
    接收PSCCH和PSSCH;
    在与PSSCH传输对应的PSFCH传输上进行HARQ反馈;
    其中,所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
    一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
    一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
    其中,M1、M2为配置或者预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
  12. 根据权利要求11所述的方法,其中,所述方法还包括:
    在所述对应关系为一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输的情况下,根据接收到的SCI,获取所述PSSCH传输实际对应的PSFCH的相关信息,所述相关信息包括以下至少一项:
    PSSCH对应的PSFCH的个数;
    PSSCH对应的PSFCH的时域位置;
    PSSCH对应的PSFCH的时频位置。
  13. 根据权利要求11所述的方法,其中,所述方法还包括:
    在由于信道接入失败导致未能成功在第一PSFCH上发送HARQ反馈信息的情况下,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息;
    基于所述第一资源,在所述第二PSFCH上发送所述HARQ反馈信息;
    其中,所述第一PSFCH和所述第二PSFCH与同一个所述PSSCH对应,且所述第二PSFCH位于所述第一PSFCH之后。
  14. 根据权利要求13所述的方法,其中,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息,包括:
    在满足第一条件的情况下,根据用于所述PSSCH传输的第二资源的时频位置信息,确定所述第一资源,且所述第二PSFCH承载的HARQ反馈信息与所述第一PSFCH承载的HARQ反馈信息相同;
    其中所述第一条件包括以下任一项:
    相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之后;
    相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之前,且所述相邻的下一次PSSCH传输和所述第二PSFCH的传输时刻之间不满足HARQ限制条件。
  15. 根据权利要求13所述的方法,其中,确定第二PSFCH使用的第一资源和所述第二PSFCH承载的HARQ反馈信息,包括:
    在相邻的下一次PSSCH传输位于所述第二PSFCH的传输时刻之前,且所述相邻的下一次PSSCH传输和所述第二PSFCH的传输时刻之间满足HARQ限制条件的情况下,执行以下任一项:
    基于用于所述PSSCH传输的第二资源的时频位置信息,确定所述第一资源,且基于对所述PSSCH传输的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;
    基于所述相邻的下一次PSSCH传输使用的第三资源的时频位置信息,确定所述第一资源,且基于所述相邻的下一次PSSCH传输的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;
    基于所述第二PSFCH之前的Y次PSSCH传输的资源的时频位置,确定 所述第一资源,且基于所述Y次PSSCH的解码结果,确定所述第二PSFCH承载的HARQ反馈信息;其中,所述Y为配置或者预配置的正整数。
  16. 一种适用于直通链路的资源选择装置,应用于第一用户设备,包括:
    选择模块,用于在支持HARQ反馈的资源池中进行资源选择,其中,选择的资源用于PSCCH传输和PSSCH传输;所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
    一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
    一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
    其中,M1和M2为配置或预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
  17. 一种适用于直通链路的资源选择装置,应用于第二用户设备,包括:
    接收模块,用于接收PSCCH和PSSCH;
    第一发送模块,用于在与PSSCH传输对应的PSFCH传输上进行HARQ反馈;
    其中,所述PSSCH传输和PSFCH传输之间的对应关系包括以下至少一项:
    一次所述PSSCH传输对应M1次位于不同时间单元上的所述PSFCH传输;
    一次所述PSSCH传输最多对应M2次位于不同时间单元上的所述PSFCH传输;
    其中,M1、M2为配置或者预配置的正整数,所述PSFCH用于承载HARQ反馈信息。
  18. 一种用户设备,包括收发机、存储器、处理器及存储在所述存储器上并在所述处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现如权利要求1至10中任一项所述的适用于直通链路的资源选择方法,或者,如权利要求11至15中任一项所述的适用于直通链路的资源选择方法。
  19. 一种计算机可读存储介质,其上存储有计算机程序,所述计算机程 序被处理器执行时实现如权利要求1至10中任一项所述的适用于直通链路的资源选择方法,或者,如权利要求11至15中任一项所述的适用于直通链路的资源选择方法。
PCT/CN2023/120277 2022-09-30 2023-09-21 一种适用于直通链路的资源选择方法、装置及用户设备 WO2024067333A1 (zh)

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Citations (3)

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CN111865485A (zh) * 2019-04-30 2020-10-30 北京三星通信技术研究有限公司 Harq反馈方法及执行harq反馈方法的ue
CN111865505A (zh) * 2019-04-30 2020-10-30 中国移动通信有限公司研究院 一种资源选择方法及设备
US20210007081A1 (en) * 2019-07-02 2021-01-07 Samsung Electronics, Ltd. Resource selection method and apparatus for sidelink transmission

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CN111865485A (zh) * 2019-04-30 2020-10-30 北京三星通信技术研究有限公司 Harq反馈方法及执行harq反馈方法的ue
CN111865505A (zh) * 2019-04-30 2020-10-30 中国移动通信有限公司研究院 一种资源选择方法及设备
US20210007081A1 (en) * 2019-07-02 2021-01-07 Samsung Electronics, Ltd. Resource selection method and apparatus for sidelink transmission

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