Method and apparatus for NR V2X sidelink HARQ procedure

Patent metadata

Field	Value
Publication number	US-11356979-B2
Application number	US-202016847497-A
Country	US
Kind code	B2
Filing date	Apr 13, 2020
Priority date	Apr 24, 2019
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

Apparatuses and methods for obtaining and providing hybrid automatic repeat request acknowledgement (HARQ-ACK) information. A method for providing HARQ-ACK information includes receiving a configuration for a slot offset value and receiving a physical sidelink shared channel (PSSCH) over a number of sub-channels in a first slot. The PSSCH includes a transport block (TB). The method includes determining a second slot as an earliest slot with resources for transmission of a physical sidelink feedback channel (PSFCH) that is after the first slot by a number of slots equal to the slot offset value. The PSFCH includes the HARQ-ACK information that is in response to reception of the TB. The method further includes transmitting the PSFCH in the second slot.

First claim

What is claimed is:

1. A method for a user equipment (UE) to provide hybrid automatic repeat request acknowledgement (HARQ-ACK) information, the method comprising:
receiving a configuration for a slot offset value;
receiving a physical sidelink shared channel (PSSCH) over a number of sub-channels in a first slot, wherein the PSSCH includes a transport block (TB);
determining a second slot as an earliest slot with resources for transmission of a physical sidelink feedback channel (PSFCH) that is after the first slot by a number of slots equal to the slot offset value, wherein the PSFCH includes the HARQ-ACK information that is in response to reception of the TB; and
transmitting the PSFCH in the second slot,
wherein sub-channels and slots of PSSCH receptions are mapped to resources for corresponding PSFCH transmissions first in ascending order of a slot index, starting from a first sub-channel index, and then in ascending order of a sub-channel index, starting from a first slot index.

2. The method of claim 1 , further comprising:
receiving a configuration for a number of slots,
wherein the resources for the transmission of the PSFCH exist with a periodicity equal to the number of slots.

3. The method of claim 1 , further comprising:
determining a number of resources for the transmission of the PSFCH in the second slot; and
transmitting the PSFCH in the second slot based on determining that the number of resources is larger than or equal to a value.

4. The method of claim 1 , further comprising:
receiving a first sidelink control information (SCI) format that includes an indication of time resources and frequency resources for the reception of the PSSCH;
receiving a second SCI format that includes an identity of a zone;
determining an indication whether to transmit the PSFCH based on the identity of the zone; and
transmitting the PSFCH based on the indication.

5. A user equipment (UE) comprising:
a transceiver configured to:
receive a configuration for a slot offset value, and
receive a physical sidelink shared channel (PSSCH) over a number of sub-channels in a first slot, wherein the PSSCH includes a transport block (TB);

a processor operably connected to the transceiver, the processor configured to determine a second slot as an earliest slot with resources for transmission of a physical sidelink feedback channel (PSFCH) that is after the first slot by a number of slots equal to the slot offset value, wherein the PSFCH includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information in response to reception of the TB; and
wherein the transceiver is further configured to transmit the PSFCH in the second slot, and
wherein sub-channels and slots of PSSCH receptions are mapped to resources for corresponding PSFCH transmissions first in ascending order of a slot index, starting from a first sub-channel index, and then in ascending order of a sub-channel index, starting from a first slot index.

6. The UE of claim 5 , wherein:
the transceiver is further configured to receive a configuration for a number of slots, and
the resources for the transmission of the PSFCH exist with a periodicity equal to the number of slots.

7. The UE of claim 5 , wherein:
the processor is further configured to determine a number of resources for the transmission of the PSFCH in the second slot; and
the transceiver is further configured to transmit the PSFCH in the second slot based on determining that the number of resources is larger than or equal to a value.

8. The UE of claim 5 , wherein:
the transceiver is further configured to:
receive a first sidelink control information (SCI) format that includes an indication of time resources and of frequency resources for the reception of the PSSCH, and
receive a second SCI format that includes an identity of a zone;

the processor is further configured to determine an indication whether to transmit the PSFCH based on the identity of the zone; and
the transceiver is further configured to transmit the PSFCH based on the indication.

9. A method for a user equipment (UE) to obtain hybrid automatic repeat request acknowledgement (HARQ-ACK) information, the method comprising:
transmitting a configuration for a slot offset value;
transmitting a physical sidelink shared channel (PSSCH) over a number of sub-channels in a first slot, wherein the PSSCH includes a transport block (TB);
determining a second slot as an earliest slot with resources for reception of a physical sidelink feedback channel (PSFCH) that is after the first slot by a number of slots equal to the slot offset value; and
receiving the PSFCH in the second slot, wherein the PSFCH includes the HARQ-ACK information that is in response to transmission of the TB, and
wherein sub-channels and slots for PSSCH transmissions are mapped to resources for corresponding PSFCH receptions first in ascending order of a slot index, starting from a first sub-channel index, and then in ascending order of a sub-channel index, starting from a first slot index.

10. The method of claim 9 , further comprising:
transmitting a configuration for a number of slots,
wherein the resources for the reception of the PSFCH exist with a periodicity equal to the number of slots.

11. The method of claim 9 , further comprising:
determining a number of resources for the reception of the PSFCH in the second slot for the reception of the PSFCH; and
receiving the PSFCH in the second slot based on determining that the number of resources is larger than or equal to a value.

12. The method of claim 9 , further comprising:
transmitting a first sidelink control information (SCI) format that includes an indication of time resources and frequency resources for the transmission of the PSSCH;
transmitting a second SCI format that includes an identity of a zone;
determining an indication whether to receive the PSFCH based on the identity of the zone; and
receiving the PSFCH based on the indication.

13. A user equipment (UE) comprising:
a transceiver configured to:
transmit a configuration for a slot offset value, and
transmit a physical sidelink shared channel (PSSCH) over a number of sub-channels in a first slot, wherein the PSSCH includes a transport block (TB);

a processor operably connected to the transceiver, the processor configured to determine a second slot as an earliest slot with resources for reception of a physical sidelink feedback channel (PSFCH) that is after the first slot by a number of slots equal to the slot offset value; and
wherein the transceiver is further configured to receive the PSFCH in the second slot, wherein the PSFCH includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information in response to transmission of the TB, and
wherein sub-channels and slots for PSSCH transmissions are mapped to resources for corresponding PSFCH receptions first in ascending order of a slot index, starting from a first sub-channel index, and then in ascending order of a sub-channel index, starting from a first slot index.

14. The UE of claim 13 , wherein:
the transceiver is further configured to transmit a configuration for a number of slots, and
the resources for the reception of the PSFCH exist with a periodicity equal to the number of slots.

15. The UE of claim 13 , wherein:
the processor is further configured to determine a number of resources for the reception of the PSFCH in the second slot for the reception of the PSFCH; and
the transceiver is further configured to receive the PSFCH in the second slot based on determining that the number of resources is larger than or

Assignees

• Samsung Electronics Co Ltd

Inventors

• He Chao
• Papasakellariou Aris

Classifications

• H04W4/46

  for vehicle-to-vehicle communication [V2V] · CPC title

• H04W4/40

  for vehicles, e.g. vehicle-to-pedestrians [V2P] · CPC title

• H04L5/0055 Primary

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title