METHOD AND APPARATUS FOR HYBRID AUTOMATIC REPEAT REQUEST IN SIDELINK COMMUNICATIONS

• US 20200136760A1
• Filed: 10/30/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Industry-Academic Cooperation Foundation, Dankook University, Kia Motors Corporation (Kia Corp.)
• Inventors: Hahn, Gene Beck, Choi, Su Han
• Granted Patent: US 11,139,920 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/1621 Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A sidelink communication method performed by a first user equipment (UE) in a communication system includes steps of: generating sidelink control information (SCI) including first resource allocation information for sidelink groupcast data and second resource allocation information for a hybrid automatic repeat request (HARQ) response for the sidelink groupcast data; transmitting the SCI to a plurality of UEs participating in sidelink communication; transmitting the sidelink groupcast data to the plurality of UEs using resources indicated by the first resource allocation information; and receiving the HARQ response for the sidelink group data from one or more UEs among the plurality of UEs using resources indicated by the second resource allocation information.

Claims

1. A sidelink communication method performed by a first user equipment (UE) in a communication system, the sidelink communication method comprising:

generating sidelink control information (SCI) including first resource allocation information for sidelink groupcast data and second resource allocation information for a hybrid automatic repeat request (HARQ) response for the sidelink groupcast data;

transmitting the SCI to a plurality of UEs participating in sidelink communication;

transmitting the sidelink groupcast data to the plurality of UEs using resources indicated by the first resource allocation information; and

receiving the HARQ response for the sidelink group data from one or more UEs among the plurality of UEs using resources indicated by the second resource allocation information.

2. The sidelink communication method according to claim 1, wherein the SCI further includes an indicator indicating whether or not to perform an HARQ response procedure for the sidelink groupcast data.

3. The sidelink communication method according to claim 1, wherein the SCI is generated using a sidelink groupcast-radio network temporary identifier (SG-RNTI) configured for sidelink groupcast communication.

4. The sidelink communication method according to claim 1, wherein a format of the SCI is configured differently according to an allocation scheme or an indication scheme of time-frequency resources for the HARQ response.

5. The sidelink communication method according to claim 1, wherein the second resource allocation information includes information indicating time-frequency resources used for transmission of the HARQ response, and the time-frequency resources are configured to be orthogonal for the plurality of UEs.

6. The sidelink communication method according to claim 5, wherein the information indicating the time-frequency resources is a bitmap, and the bitmap is composed of sidelink groupcast identifiers used to distinguish the plurality of UEs in the sidelink communication.

7. The sidelink communication method according to claim 5, wherein the second resource allocation information includes information indicating a reference point and an offset between the reference point and a starting point of each of the time-frequency resources for the plurality of UEs.

8. The sidelink communication method according to claim 1, wherein the second resource allocation information includes information on orthogonal cover codes (OCCs) applied to the HARQ response, and the OCCs are configured to be orthogonal for the plurality of UEs.

9. The sidelink communication method according to claim 1, further comprising performing a retransmission procedure of the sidelink groupcast data when the HARQ response received from the one or more UEs is a negative acknowledgement (NACK), wherein the retransmission procedure is performed in a groupcast scheme with all UEs participating in the sidelink communication, a groupcast scheme with the one or more UEs, or a unicast scheme with each of the one or more UEs.

10. A sidelink communication method performed by a first user equipment (UE) in a communication system, the sidelink communication method comprising:

receiving sidelink control information (SCI) from a second UE, the SCI including first resource allocation information for sidelink groupcast data and second resource allocation information for a hybrid automatic repeat request (HARQ) response for the sidelink groupcast data;

receiving the sidelink groupcast data from the second UE through resources indicated by the first resource allocation information; and

transmitting the HARQ response for the sidelink groupcast data to the second UE through resources indicated by the second resource allocation information.

11. The sidelink communication method according to claim 10, wherein the SCI further includes an indicator indicating whether or not to perform an HARQ response procedure for the sidelink groupcast data, and the HARQ response is transmitted when the indicator indicates that the HARQ response procedure is performed.

12. The sidelink communication method according to claim 10, wherein the SCI is received using a sidelink groupcast-radio network temporary identifier (SG-RNTI) configured for sidelink groupcast communication.

13. The sidelink communication method according to claim 10, wherein a format of the SCI is configured differently according to an allocation scheme or an indication scheme of time-frequency resources for the HARQ response.

14. The sidelink communication method according to claim 10, wherein the second resource allocation information includes information indicating time-frequency resources used for transmission of the HARQ response, and the time-frequency resources are configured to be orthogonal for the plurality of UEs.

15. The sidelink communication method according to claim 10, wherein the second resource allocation information includes information on orthogonal cover codes (OCCs) applied to the HARQ response, and the OCCs are configured to be orthogonal for the plurality of UEs.

16. A first user equipment (UE) performing sidelink communication in a communication system, the first UE comprising a processor and a memory storing at least one instruction executable by the processor, wherein when executed by the processor, the at least one instruction is configured the processor to:

generate sidelink control information (SCI) including first resource allocation information for sidelink groupcast data and second resource allocation information for a hybrid automatic repeat request (HARQ) response for the sidelink groupcast data;

transmit the SCI to a plurality of UEs participating in sidelink communication;

transmit the sidelink groupcast data to the plurality of UEs using resources indicated by the first resource allocation information; and

receive the HARQ response for the sidelink group data from one or more UEs among the plurality of UEs using resources indicated by the second resource allocation information.

17. The first UE according to claim 16, wherein the SCI further includes an indicator indicating whether or not to perform an HARQ response procedure for the sidelink groupcast data.

18. The first UE according to claim 16, wherein the second resource allocation information includes information indicating time-frequency resources used for transmission of the HARQ response, and the time-frequency resources are configured to be orthogonal for the plurality of UEs.

19. The first UE according to claim 16, wherein the second resource allocation information includes information on orthogonal cover codes (OCCs) applied to the HARQ response, and the OCCs are configured to be orthogonal for the plurality of UEs.

20. The first UE according to claim 16, wherein the at least one processor is further configured the processor to perform a retransmission procedure of the sidelink groupcast data when the HARQ response received from the one or more UEs is a negative acknowledgement (NACK), wherein the retransmission procedure is performed in a groupcast scheme with all UEs participating in the sidelink communication, a groupcast scheme with the one or more UEs, or a unicast scheme with each of the one or more UEs.