Data transmission method, data transmission device, non-transitory computer readable medium and chip

Abstract

The invention discloses a data transmission method, a data transmission device, a non-transitory computer readable medium and a chip for sidelink communication.

Description

[0001] This application is a divisional application of the invention patent application with application date of November 20, 2020, application number 202080071759.2, and invention name "Data transmission method, data transmission device, non-temporary computer-readable medium and chip". Technical Field

[0002] The present disclosure relates to communication technology, and more particularly to sidelink communication. Background Art

[0003] The statements in this section only provide information related to the present disclosure and may not constitute prior art. In addition, the contents in this section may be used to define concepts related to the present invention.

[0004] For example, in 5th Generation New Radio (5G-NR) sidelink communications, a user equipment (UE) may participate in sidelink unicast or multicast communications.

[0005] The UE may need to determine appropriate sidelink feedback resources. Summary of the invention

[0006] A data transmission method, a data transmission device, a computer program, a non-transitory computer-readable medium and a chip for sidelink communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The drawings are for illustration purposes only and are not intended to limit the present invention.

[0008] - Figure 1 A flow chart showing a method; and

[0009] - Figure 2 An exemplary UE is shown. DETAILED DESCRIPTION

[0010] In fifth generation (new radio, 5G-NR) sidelink communications, a user equipment (UE) may participate in sidelink unicast or multicast communications. When a sidelink message sending UE (Tx-UE) requests a receiving UE (Rx-UE) to feedback a HARQ report for a received message (by enabling HARQ feedback), the Rx-UE may determine or select appropriate sidelink feedback resources to send an acknowledgement (ACK) and / or negative acknowledgement (NACK) report based on the feedback option type of unicast, multicast option 1, or multicast option 2. For multicast option 2, it may be desirable to do so in a manner that minimizes transmission interference between multiple HARQ feedback UEs (i.e., more than one UE needs to provide their HARQ reports for the same sidelink transmission at the same time).

[0011] HARQ feedback option 1 may be a NACK-only HARQ reporting scheme for NR sidelink communications in the 3GPP standard. HARQ feedback option 2 may be an ACK / NACK HARQ reporting scheme for a known group size in multicast for NR sidelink communications in the 3GPP standard.

[0012] After configuring and determining a set of PSFCH candidate resources (i.e., PSFCH RBs) for a specific / corresponding PSCCH / PSSCH transmission, each PSFCH resource may be indexed in a frequency-first and then cyclic-shifted manner (e.g., first, e.g., as a first step of a PSFCH transmission process for an Rx-UE). This may result in a reduction in transmission interference between multiple HARQ feedback UEs.

[0013] For each Rx-UE that feeds back its HARQ report, the Rx-UE may determine (in other words: select) a suitable PSFCH resource according to the following manner: for a PSFCH candidate resource set having Z physical resource blocks (PRBs) and Y cyclic shift sequence pairs in each PRB (the number of PSFCHs in the PRB), the Rx-UE selects a feedback PSFCH resource indexed as ((K+M)mod(Z*Y)) and uses it for HARQ reporting, where K may be the L1 (physical layer) source ID (identifier) ​​of the associated PSCCH / PSSCH, M may be the member ID of the Rx-UE for multicast HARQ feedback option 2, M may be an integer between 0 and X-1, where X may be the group size of the multicast session, where M=0 for unicast and multicast HARQ feedback option 1. In addition, when X>Z*Y, multicast HARQ feedback option 2 may not be used.

[0014] According to various embodiments, the distribution of HARQ reports among multiple feedback UEs may be performed by indexing the PSFCH resources in a frequency-first and then cyclic-shift manner to minimize transmission interference.

[0015] When there is more than one UE that needs to provide HARQ feedback reports for the same PSCCH / PSSCH transmission, the determination / selection of the actual / final PSFCH resource may be based on its member ID within the groupcast and layer 1 (physical layer) source ID to further randomize interference.

[0016] According to various embodiments, when the size of the groupcast is larger than the total number of candidate PSFCH resources, HARQ feedback option 2 with ACK / NACK feedback may not be used. Therefore, according to various embodiments, the selection of HARQ feedback option 1 or 2 may depend on the number of HARQ feedback UEs.

[0017] According to a method based on various embodiments, feedback resources in a physical sidelink feedback channel (PSFCH) may be determined for a message receiving user equipment (Rx-UE) to send its hybrid automatic repeat request (HARQ) report in an NR sidelink communication. As described herein, according to various embodiments, each PSFCH resource may be first indexed in a frequency-first and then cyclic shift manner.

[0018] Indexing the PSFCH resources in a frequency-then-cyclic-shift manner (in other words: mapping) may provide that the feedback reports from each member UE are first distributed in different PRBs within the same group before the code domain to minimize transmission interference among all feedback UEs.

[0019] As an illustrative example, if there are 3 PRBs, 2 cyclic shift pairs in each PRB, and 3 member UEs send their HARQ feedback, then according to the resource determination method described herein, the first member UE can select the first cyclic shift pair in the first PRB, the second member UE can select the first cyclic shift pair in the second PRB, and the third member UE can select the first cyclic shift pair in the third PRB. Therefore, their HARQ feedback reports can be distributed across different PRBs. If they all select different cyclic shift PSFCHs within the same PRB, then their transmissions may interfere with each other.

[0020] The methods and apparatus according to various embodiments may be applied to 3GPP TS 38.213v16.2.0 (2020-06) and CR R1-2007454 (2020-08) for TS 38.213 supported by RAN1, as described below.

[0021] According to various embodiments, a UE procedure for reporting HARQ-ACK on the sidelink may be provided.

[0022] Can be found in the number of The SCI format of the scheduled PSSCH reception in one or more subchannels of the subchannels of the UE is used to instruct the UE to send a PSFCH with HARQ-ACK information in response to the PSSCH reception. The UE may provide HARQ-ACK information including ACK or NACK, or only NACK.

[0023] For the period of PSFCH transmission opportunity resources, a number of time slots in the resource pool can be provided to the UE via sl-PSFCH-Period-r16. If the number of time slots is zero, PSFCH transmission from the UE in the resource pool can be disabled.

[0024] if Then the UE may expect the time slot There are PSFCH transmission opportunity resources, among which, According to TS 38.214 definition, T′ max can be the number of time slots belonging to the resource pool within 10240 milliseconds according to TS 38.214, and Can be provided by sl-PSFCH-Period-r16.

[0025] In response to PSSCH reception as defined in TS 38.321, the UE may be instructed by higher layers not to send PSFCH.

[0026] If the UE receives a PSSCH in a resource pool and the HARQ Feedback Enable / Disable Indicator field in the associated SCI format 2-A or SCI format 2-B may have a value of 1, as defined in TS 38.212, the UE may provide HARQ-ACK information in a PSFCH transmission in the resource pool. The UE may send the PSFCH in the first slot that includes the PSFCH resources and may be at least a number of slots after the last slot of the PSSCH reception in the resource pool (provided by sl-MinTimeGapPSFCH-r16).

[0027] sl-PSFCH-RB-Set-r16 can provide UE with A set of PRBs for PSFCH transmission in the PRBs of the resource pool. For the number of resource pools provided by sl-NumSubchannel is N subch The number of subchannels associated with the PSFCH slot is less than or equal to Multiple PSSCH time slots, UE can send PRB PRBs are allocated to slot i in the PSSCH slot associated with the PSFCH slot and subchannel j, where 0≤j <N subch , and the allocation may start in ascending order of i and continue in ascending order of j. The UE may expect that yes multiples of.

[0028] The UE may determine the number of PSFCH resources available for multiplexing HARQ-ACK information in PSFCH transmission as in, It can be the number of cyclic shift pairs in the resource pool and is based on the instructions of the higher layer.

[0029] · and PRBs may be associated with the starting subchannel of the corresponding PSSCH; or

[0030] ● and PRBs can be combined with The subchannel is associated with one or more subchannels of the subchannel.

[0031] PSFCH resources can first be based on The PRB indices of the PRBs are indexed in ascending order, and then The cyclic shift pair indices of the cyclic shift pairs are indexed in ascending order.

[0032] The UE may determine the index of the PSFCH resource for PSFCH transmission in response to PSSCH reception as Among them, P ID M may be the physical layer source ID for scheduled PSSCH reception provided by SCI format 2-A or 2-B (according to TS 38.212, and described below), and M ID (may be referred to as Member ID) may be the identity of the UE receiving the PSSCH indicated by the higher layer if the UE detects SCI format 2-A with a Cast Type Indicator field value of "01"; otherwise, N ID is zero.

[0033] The UE can use Table 1 to obtain the cyclic shift pair index corresponding to the PSFCH resource index and from To determine the value of m0 for calculating the value of cyclic shift α according to TS 38.211.

[0034] Table 1: Set of cyclic shift pairs

[0035]

[0036] If the UE detects SCI format 2-A with a Cast Type Indicator field value of "01" as shown in Table 2, or if the UE detects SCI format 2-B or SCI format 2-A with a Cast Type Indicator field value of "11" as shown in Table 3, the UE may determine m cs The UE may apply one cyclic shift from the cyclic shift pair to the sequence for PSFCH transmission according to TS 38.211.

[0037] Table 2: Mapping of HARQ-ACK information bit values ​​to cyclic shifts (from cyclic shift pairs) of the sequence used for PSFCH transmission when the HARQ-ACK information includes ACK or NACK

[0038] HARQ-ACK value 0(NACK) 1(ACK) Sequence cyclic shift 0 6

[0039] Table 3: Mapping of HARQ-ACK information bit values ​​to cyclic shifts (from cyclic shift pairs) of the sequence used for PSFCH transmission when the HARQ-ACK information includes only NACKs

[0040] HARQ-ACK value 0(NACK) 1(ACK) Sequence cyclic shift 0 N / A

[0041] The methods and apparatus according to various embodiments may be applied to 3GPP TS 38.212v16.2.0 (2020-06) and CR R1-2007453 (2020-08) for TS 38.212 supported by RAN1, as described below. The second-stage SCI format may be as described below. For example, SCI format 2-A may be as described below.

[0042] SCI format 2-A can be used for decoding of PSSCH, wherein a HARQ operation is performed when HARQ-ACK information includes ACK or NACK, when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.

[0043] The following information is transmitted using SCI Format 2-A:

[0044] -HARQ process number - 4 bits;

[0045] - New data indicator - 1 bit;

[0046] - Redundancy version - 2 bits;

[0047] - Source ID - 8 bits (may be the physical layer source ID used in the predetermined formula described herein);

[0048] - Destination ID - 16 bits;

[0049] - HARQ feedback enable / disable indicator - 1 bit, e.g., as defined above;

[0050] - Cast type indicator - 2 bits, e.g., as defined in Table 4; and

[0051] -CSI request - 1 bit.

[0052] Table 4: Cast type indicator

[0053]

[0054] The methods and apparatus according to various embodiments may be applied to TS 38.321 v16.1.0 (2020-07) as described below. Sidelink HARQ operations, in particular, operations of sidelink HARQ entities will be described.

[0055] The delivered sidelink grant and its associated sidelink transmission information may be associated with a sidelink process. Each sidelink process may support 1 TB (transmission block).

[0056] For each sidelink grant, the sidelink HARQ entity shall:

[0057] 1> If the MAC entity determines that the sidelink is granted for the initial transmission; or

[0058] 1> If no MAC PDU (Protocol Data Unit) is obtained:

[0059] 2> Associate the sidelink process to the authorization, and for each associated sidelink process:

[0060] 3> Obtain the MAC PDU to be transmitted from the multiplexing and assembly entity, if any;

[0061] 3> If the MAC PDU to be transmitted has been obtained:

[0062] 4> If the HARQ process ID has been set for the sidelink grant:

[0063] 5> Associate the HARQ process ID corresponding to the side link grant to the associated side link process;

[0064] 4> Determine the sidelink transmission information of the TB for the source destination pair of the MAC PDU as follows:

[0065] 5> Set the source layer-1 ID to the 8LSB of the source layer-2 ID of the MAC PDU;

[0066] 5> Set the destination layer-1 ID to the 16LSB of the destination layer-2 ID of the MAC PDU;

[0067] 5> Consider that NDI has been switched and set NDI to the switched value;

[0068] 5> Associate the sidelink process to the sidelink process ID;

[0069] 5> Set the cast type to one of broadcast, multicast, and unicast, as indicated by the upper layer;

[0070] 5> If sl-HARQ-FeedbackEnabled has been set to Enabled for the logical channel in the MAC PDU;

[0071] 6> Enable HARQ feedback.

[0072] 5>Other situations:

[0073] 6> Disable HARQ feedback.

[0074] 5> Set the priority to the value of the highest priority of the logical channel and MAC CE, if any, if included, in the MAC PDU;

[0075] 5> If HARQ feedback is enabled for multicast:

[0076] 6> If both the group size and the member ID are provided by upper layers, and the group size is not greater than the number of candidate PSFCH resources associated with this sidelink grant:

[0077] 7> Select Positive-Negative Confirmation or Negative Confirmation Only.

[0078] 6>Other situations:

[0079] 7> Select Negative confirmation only.

[0080] 6> If Negative Acknowledgement Only is selected, the UE's location information is available, and sl-TransRange has been configured for the logical channel in the MAC PDU, and the Zone_id is determined as specified in TS 38.331:

[0081] 7> Set the communication range requirement to the value of the longest communication range of the logical channel in the MAC PDU (if configured);

[0082] 7> Set Zone_id to the value of the determined Zone_id.

[0083] It should be noted that for configuration authorization types 1 and 2, only one new TB can be transmitted within the configuration authorization period.

[0084] It should be noted that setting the initial value of NDI for the first transmission of the sidelink HARQ entity may be left to the UE implementation.

[0085] It should be noted that how the UE determines the sidelink process ID in the SCI can be left to the UE implementation of the NR sidelink.

[0086] As described above, a feedback resource determination method for NR sidelink communication may be provided. According to various embodiments, appropriate sidelink feedback PSFCH resources may be determined for an NR sidelink communication Rx-UE. The method may be applied to vehicles / cars and user devices (smartphones) equipped with a 3GPP Release 16 or higher 5G NR-V2X capable communication modem chipset. Various embodiments may be implemented in a vehicle UE and / or a gNB.

[0087] Figure 1 1 is a flow chart illustrating a method for data transmission according to various embodiments. The method may be performed by an apparatus, wherein the apparatus is configured for sidelink communication. At S120, an index of a PSFCH resource may be determined as a sidelink feedback resource. The PSFCH resource may be first indexed according to a frequency resource block, and then indexed according to a cyclic shift pair. The cyclic shift pair may include two paired cyclic shift sequences to represent ACK and NACK information, or only NACK information. One or more cyclic shift pairs may be configured for each frequency resource block.

[0088] According to various embodiments, the index may be determined based on the physical layer source ID of the associated PSCCH / PSSCH.

[0089] According to various embodiments, the index may be determined based on the member ID of the device.

[0090] According to various embodiments, the index may be determined based on the number of physical resource blocks.

[0091] According to various embodiments, the index may be determined based on the number of cyclic shift pairs in each physical resource block of the resource pool.

[0092] According to various embodiments, the index may be determined based on a predetermined formula.

[0093] According to various embodiments, the predetermined formula may be based on the physical layer source ID of the associated PSCCH / PSSCH, the member ID of the device, the number of physical resource blocks, and the number of cyclic shift pairs in each physical resource block of the resource pool.

[0094] According to various embodiments, the predetermined formula may be I=(K+M)mod(Z*Y), where I may be an index, K may be a physical layer source ID of the associated PSCCH / PSSCH, M may be a member ID of the device, Z may be the number of physical resource blocks, and Y may be the number of cyclic shift pairs in each physical resource block of the resource pool.

[0095] According to various embodiments, the apparatus may include or may be a user equipment UE, and the sidelink communication includes communication between the user equipment and another user equipment.

[0096] According to various embodiments, the sidelink communication may include or may be a communication according to 3GPP standard TS 36.213 for sidelink communications.

[0097] According to various embodiments, the sidelink communication may include or may be a communication according to 3GPP standard TS 38.212 for sidelink communications and / or 3GPP standard TS 38.321 for sidelink communications.

[0098] According to various embodiments, the sidelink feedback resources may be used to transmit ACK reports and / or NACK reports.

[0099] According to various embodiments, the sidelink feedback resources may be used to transmit feedback using unicast.

[0100] According to various embodiments, the sidelink feedback resources may be used to transmit feedback using multicast option 1.

[0101] According to various embodiments, the sidelink feedback resources may be used to transmit feedback using multicast option 2.

[0102] An apparatus configured to perform a method as described herein may be provided, for example, Figure 2 UE shown.

[0103] According to various embodiments, the apparatus may include a transmitting device configured to transmit data using sidelink communication; and a receiving device configured to receive data using sidelink communication.

[0104] According to various embodiments, the apparatus may include one or more processors and one or more memories storing program instructions, and the apparatus is configured to perform the method as described herein when the program instructions are executed by the one or more processors.

[0105] A computer program may be provided comprising program instructions which, when executed by one or more processors in a device, cause the device to perform a method as described herein.

[0106] A carrier (eg, a computer-readable medium) for carrying a computer program as described herein may be provided.

[0107] The following references may be helpful in understanding the present disclosure:

[0108]

[0109] Some abbreviations used in this disclosure are listed below:

[0110]

[0111]

[0112] Terms:

[0113] 1. A data transmission method performed by an apparatus, wherein the apparatus is configured for sidelink communication, the method comprising:

[0114] Determining an index of a PSFCH resource as a sidelink feedback resource;

[0115] Therein, PSFCH resources are first indexed according to frequency resource blocks and then indexed according to cyclic shift pairs.

[0116] 2. Data transfer methods in accordance with clause 1,

[0117] The index is determined based on the physical layer source ID of the associated PSCCH / PSSCH.

[0118] 3. a data transfer method according to at least one of clauses 1 or 2,

[0119] The index is determined based on the member ID of the device.

[0120] 4. the data transfer method according to at least one of clauses 1 to 3,

[0121] The index is determined based on the number of physical resource blocks.

[0122] 5. the data transfer method according to at least one of clauses 1 to 4,

[0123] The index is determined based on the number of cyclic shift pairs in each physical resource block in the resource pool.

[0124] 6. the data transfer method according to at least one of clauses 1 to 5,

[0125] The index is determined based on a predetermined formula.

[0126] 7. The data transfer method according to at least one of clauses 1 to 6,

[0127] The predetermined formula is based on the physical layer source ID of the associated PSCCH / PSSCH, the member ID of the device, the number of physical resource blocks, and the number of cyclic shift pairs in each physical resource block of the resource pool.

[0128] 8. Data transfer methods in accordance with clause 7,

[0129] Among them, the predetermined formula is I = (K + M) mod (Z * Y),

[0130] Where I is the index, K is the physical layer source ID of the associated PSCCH / PSSCH, M is the member ID of the device, Z is the number of physical resource blocks, and Y is the number of cyclic shift pairs in each physical resource block of the resource pool.

[0131] 9. the data transfer method according to at least one of clauses 1 to 8,

[0132] The apparatus comprises a user equipment UE, and the sidelink communication comprises communication between the user equipment and another user equipment.

[0133] 10. The data transmission method according to at least one of clauses 1 to 9,

[0134] Therein, the sidelink communication comprises communication according to 3GPP standard TS 36.213 for sidelink communication.

[0135] 11. The data transmission method according to at least one of clauses 1 to 10,

[0136] Therein, the sidelink communication includes communication according to 3GPP standard TS 38.212 for sidelink communication and / or 3GPP standard TS 38.321 for sidelink communication.

[0137] 12. The data transmission method according to at least one of clauses 1 to 11,

[0138] The sidelink feedback resource is used to transmit an ACK report and / or a NACK report.

[0139] 13. The data transfer method according to at least one of clauses 1 to 12,

[0140] The sidelink feedback resource is used to transmit feedback using unicast.

[0141] 14. The data transfer method according to at least one of clauses 1 to 12,

[0142] The sidelink feedback resource is used to transmit feedback using multicast option 1.

[0143] 15. The data transfer method according to at least one of clauses 1 to 12,

[0144] The sidelink feedback resource is used to transmit feedback using multicast option 2.

[0145] 16. A data transmission device, wherein the device is configured for sidelink communication, the device comprising:

[0146] A processing module configured to determine an index of a PSFCH resource as a sidelink feedback resource;

[0147] Therein, PSFCH resources are first indexed according to frequency resource blocks and then indexed according to cyclic shift pairs.

[0148] 17. A device according to clause 16,

[0149] The index is determined based on the physical layer source ID of the associated PSCCH / PSSCH.

[0150] 18. A device according to at least one of clauses 16 or 17,

[0151] The index is determined based on the member ID of the device.

[0152] 19. The device according to at least one of clauses 16 to 18,

[0153] The index is determined based on the number of physical resource blocks.

[0154] 20. The device according to at least one of clauses 16 to 19,

[0155] The index is determined based on the number of cyclic shift pairs in each physical resource block in the resource pool.

[0156] 21. The device according to at least one of clauses 16 to 20,

[0157] The index is determined based on a predetermined formula.

[0158] 22. The device according to at least one of clauses 16 to 21,

[0159] The predetermined formula is based on the physical layer source ID of the associated PSCCH / PSSCH, the member ID of the device, the number of physical resource blocks, and the number of cyclic shift pairs in each physical resource block of the resource pool.

[0160] 23. A device according to clause 22,

[0161] Among them, the predetermined formula is I = (K + M) mod (Z * Y),

[0162] Where I is the index, K is the physical layer source ID of the associated PSCCH / PSSCH, M is the member ID of the device, Z is the number of physical resource blocks, and Y is the number of cyclic shift pairs in each physical resource block of the resource pool.

[0163] 24. The device according to at least one of clauses 16 to 23,

[0164] The apparatus includes a user equipment UE, and the sidelink communication includes communication between the user equipment and another user equipment.

[0165] 25. The device according to at least one of clauses 16 to 24,

[0166] Therein, the sidelink communication comprises communication according to 3GPP standard TS 36.213 for sidelink communication.

[0167] 26. The device according to at least one of clauses 16 to 25,

[0168] Therein, the sidelink communication includes communication according to 3GPP standard TS 38.212 for sidelink communication and / or 3GPP standard TS 38.321 for sidelink communication.

[0169] 27. The device according to at least one of clauses 16 to 26,

[0170] The sidelink feedback resource is used to transmit an ACK report and / or a NACK report.

[0171] 28. The device according to at least one of clauses 16 to 27,

[0172] The sidelink feedback resource is used to transmit feedback using unicast.

[0173] 29. The device according to at least one of clauses 16 to 27,

[0174] The sidelink feedback resource is used to transmit feedback using multicast option 1.

[0175] 30. The device according to at least one of clauses 16 to 27,

[0176] The sidelink feedback resource is used to transmit feedback using multicast option 2.

[0177] 31. A data transmission device comprising one or more processors and one or more memories storing program instructions, the device being configured to perform the method according to any one of clauses 1 to 15 when the program instructions are executed by the one or more processors.

[0178] 32. A computer program comprising program instructions which, when executed by one or more processors in an apparatus, cause the apparatus to perform a method according to any one of clauses 1 to 15.

[0179] 33. A non-transitory computer-readable medium comprising instructions executable by a processor to perform the method according to any one of clauses 1 to 15.

[0180] 34. A chip comprising one or more processors configured to execute program instructions stored in one or more memories to perform the method according to any one of clauses 1 to 15.

[0181] It should be understood that the present invention is not limited to any details described above, but should be broadly interpreted based on the principles defined in the appended claims. Therefore, all changes and modifications or their equivalents falling within the scope of the claims should be included in the scope of protection.

Claims

1. A data transmission method performed by a device, wherein: The apparatus is configured for sidelink communication, the method comprising: Determining an index of a PSFCH resource as a sidelink feedback resource; Therein, the PSFCH resources are first indexed according to frequency resource blocks and then indexed according to cyclic shift pairs.

2. The data transmission method according to claim 1, wherein: The index is determined based on the physical layer source ID of the associated PSCCH / PSSCH.

3. The data transmission method according to claim 1 , in, The index is determined based on the member ID of the device.

4. The data transmission method according to claim 1, in, The index is determined based on the number of physical resource blocks.

5. The data transmission method according to claim 1, in, The index is determined based on the number of cyclic shift pairs in each physical resource block of the resource pool.

6. The data transmission method according to at least one of claims 1 to 5, in, The index is determined based on a predetermined formula.

7. The data transmission method according to at least one of claims 1 to 6, in, The predetermined formula is based on the physical layer source ID of the associated PSCCH / PSSCH, the member ID of the device, the number of physical resource blocks, and the number of cyclic shift pairs in each physical resource block of a resource pool.

8. The data transmission method according to claim 7, in, The predetermined formula is I=(K+M)mod(Z*Y), Wherein, I is the index, K is the physical layer source ID of the associated PSCCH / PSSCH, M is the member ID of the device, Z is the number of physical resource blocks, and Y is the number of cyclic shift pairs in each physical resource block of the resource pool.

9. The data transmission method according to at least one of claims 1 to 8, in, The apparatus comprises a user equipment UE, and the sidelink communication comprises communication between the user equipment and another user equipment.

10. The data transmission method according to at least one of claims 1 to 9, in, The sidelink communications include communications according to 3GPP standard TS 36.213 for sidelink communications.

11. The data transmission method according to at least one of claims 1 to 10, in, The sidelink communications include communications according to 3GPP standard TS 38.212 for sidelink communications and / or 3GPP standard TS 38.321 for sidelink communications.

12. The data transmission method according to at least one of claims 1 to 11, in, The sidelink feedback resource is used to transmit an ACK report and / or a NACK report.

13. The data transmission method according to at least one of claims 1 to 12, in, The sidelink feedback resource is used to transmit feedback using unicast.

14. A data transmission device, wherein: The apparatus is configured for sidelink communication, the apparatus comprising: A processing module configured to determine an index of a PSFCH resource as a sidelink feedback resource; Therein, the PSFCH resources are first indexed according to frequency resource blocks and then indexed according to cyclic shift pairs.

15. A data transmission device, comprising one or more processors and one or more memories storing program instructions, wherein the device is configured to perform the method according to any one of claims 1 to 13 when the program instructions are executed by the one or more processors.

16. A computer program comprising program instructions which, when executed by one or more processors in a device, cause the device to perform the method according to any one of claims 1 to 13.

17. A non-transitory computer readable medium comprising instructions, the instructions being executed by a processor to perform the method according to any one of claims 1 to 13.

18. A chip comprising one or more processors, wherein the one or more processors are configured to execute program instructions stored in one or more memories to perform the method according to any one of claims 1 to 13.

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