US-12627413-B2 - HARQ-ACK codebook handling

Abstract

Embodiments of the present disclosure relate to methods, devices and computer readable storage media for hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook handling. In example embodiments, a method is provided. The method comprises determining, at a terminal device, respective hybrid automatic repeat request (HARQ) feedback configurations of a plurality of HARQ processes, wherein each HARQ feedback configuration indicates whether HARQ feedback is enabled or disabled for a corresponding HARQ process; and generating a HARQ-ACK codebook for Physical Downlink Shared Channel (PDSCH) based on the HARQ feedback configurations of the plurality of HARQ processes; and transmitting the HARQ-ACK codebook to a network device.

Inventors

• Huaning Niu
• Haitong Sun
• Chunxuan Ye
• Dawei Zhang
• Wei Zeng
• Weidong Yang
• Hong He
• Sigen Ye
• Chunhai Yao
• Oghenekome Oteri

Assignees

• APPLE INC.

Dates

Publication Date

20260512

Application Date

20210531

Priority Date

20210115

Claims (20)

1. 1 . A method comprising: determining, at a terminal device, respective hybrid automatic repeat request (HARQ) feedback configurations of a plurality of HARQ processes, wherein each HARQ feedback configuration indicates whether HARQ feedback is enabled or disabled for a corresponding HARQ process, wherein determining respective HARQ feedback configurations of a plurality of HARQ processes comprises: receiving at least one semi-persistent scheduling (SPS) configuration corresponding to the plurality of HARQ processes from the network device; and determining the HARQ feedback configurations of the plurality of HARQ processes based on the at least one SPS configuration; generating a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook for Physical Downlink Shared Channel (PDSCH) based on the HARQ feedback configurations of the plurality of HARQ processes, wherein generating the HARQ-ACK codebook comprises: generating the HARQ-ACK codebook for SPS PDSCH based on the HARQ feedback configurations of the plurality of HARQ processes, wherein the HARQ-ACK codebook is a Type-1 HARQ-ACK codebook or Type-2 HARQ-ACK codebook; and transmitting the HARQ-ACK codebook to a network device.
2. 2 . The method of claim 1 , wherein the plurality of HARQ processes comprises a HARQ process with HARQ feedback disabled and generating the HARQ-ACK codebook comprises: generating the HARQ-ACK codebook by including no HARQ feedback bit and no new data indicator (NDI) corresponding to the HARQ process.
3. 3 . The method of claim 1 , wherein the plurality of HARQ processes comprises a HARQ process with HARQ feedback disabled and generating the HARQ-ACK codebook comprises one of the following: generating the HARQ-ACK codebook by including at least one HARQ feedback bit corresponding to the HARQ process and setting a NDI corresponding to the HARQ process to a predetermined value; or generating the HARQ-ACK codebook by including the at least one HARQ feedback bit and no NDI corresponding to the HARQ process.
4. 4 . The method of claim 1 , wherein the plurality of HARQ processes comprises a first HARQ process with HARQ feedback enabled and a second HARQ process with HARQ feedback disabled and generating the HARQ-ACK codebook comprises: generating the HARQ-ACK codebook by including a first HARQ feedback bit corresponding to the first HARQ process and a second HARQ feedback bit corresponding to the second HARQ process.
5. 5 . The method of claim 4 , wherein the second HARQ feedback bit is located after the first HARQ feedback bit.
6. 6 . The method of claim 4 , wherein the first and second HARQ feedback bits are ordered by HARQ process number of the first and second HARQ processes.
7. 7 . The method of claim 1 , wherein the HARQ-ACK codebook is a Type-3 HARQ-ACK codebook.
8. 8 . The method of claim 1 , wherein determining the HARQ feedback configurations of the plurality of HARQ processes based on the at least one SPS configuration comprises: for a HARQ process comprised in the plurality of HARQ processes, in response to the at least one SPS configuration indicating a first HARQ feedback configuration for the HARQ process and a further configuration indicating a second HARQ feedback configuration for the HARQ process, determining the HARQ feedback configuration of the HARQ process as one of the following: the first HARQ feedback configuration; the second HARQ feedback configuration; a third HARQ feedback configuration indicating that HARQ feedback is enabled for the HARQ process; or a fourth HARQ feedback configuration indicating that HARQ feedback is disabled for the HARQ process.
9. 9 . The method of claim 1 , wherein generating the HARQ-ACK codebook for SPS PDSCH comprises: generating HARQ feedback bits for at least one HARQ process comprised in the plurality of HARQ processes, wherein HARQ feedback is enabled for the at least one HARQ process; ordering the HARQ feedback bits first by their corresponding serving cell indices, second by their corresponding HARQ process number and third by their corresponding SPS PDSCH reception slot number; and generating the HARQ-ACK codebook comprising the ordered HARQ-ACK bits.
10. 10 . The method of claim 1 , wherein HARQ processes corresponding to a SPS configuration shares a same HARQ feedback configuration and generating the HARQ-ACK codebook comprises: generating HARQ feedback bits for at least one HARQ process comprised in the plurality of HARQ processes, wherein HARQ feedback is enabled for the at least one HARQ process; ordering the HARQ feedback bits first by their corresponding serving cell indices, second by their corresponding SPS configuration indices and third by their corresponding SPS PDSCH reception slot number; and generating the HARQ-ACK codebook comprising the ordered HARQ-ACK bits.
11. 11 . The method of claim 1 , wherein HARQ processes corresponding to a SPS configuration have different HARQ feedback configurations and generating the HARQ-ACK codebook comprises: generating HARQ feedback bits for at least one HARQ process comprised in the plurality of HARQ processes, wherein HARQ feedback is enabled for the at least one HARQ process; ordering the HARQ feedback bits first by their corresponding serving cell indices, second by their corresponding SPS configuration indices, third by their corresponding HARQ process number and fourth by their corresponding SPS PDSCH reception slot number; and generating the HARQ-ACK codebook comprising the ordered HARQ-ACK bits.
12. 12 . An apparatus comprising processing circuitry coupled to a memory, the processing circuitry configured to perform operations comprising: determining, at a terminal device, respective hybrid automatic repeat request (HARQ) feedback configurations of a plurality of HARQ processes, wherein each HARQ feedback configuration indicates whether HARQ feedback is enabled or disabled for a corresponding HARQ process, wherein determining respective HARQ feedback configurations of a plurality of HARQ processes comprises: receiving at least one semi-persistent scheduling (SPS) configuration corresponding to the plurality of HARQ processes from the network device; and determining the HARQ feedback configurations of the plurality of HARQ processes based on the at least one SPS configuration; generating a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook for Physical Downlink Shared Channel (PDSCH) based on the HARQ feedback configurations of the plurality of HARQ processes, wherein generating the HARQ-ACK codebook comprises: generating the HARQ-ACK codebook for SPS PDSCH based on the HARQ feedback configurations of the plurality of HARQ processes, wherein the HARQ-ACK codebook is a Type-1 HARQ-ACK codebook or Type-2 HARQ-ACK codebook; and transmitting the HARQ-ACK codebook to a network device.
13. 13 . The apparatus of claim 12 , wherein the plurality of HARQ processes comprises a HARQ process with HARQ feedback disabled and generating the HARQ-ACK codebook comprises: generating the HARQ-ACK codebook by including no HARQ feedback bit and no new data indicator (NDI) corresponding to the HARQ process.
14. 14 . The apparatus of claim 12 , wherein the plurality of HARQ processes comprises a HARQ process with HARQ feedback disabled and generating the HARQ-ACK codebook comprises one of the following: generating the HARQ-ACK codebook by including at least one HARQ feedback bit corresponding to the HARQ process and setting a NDI corresponding to the HARQ process to a predetermined value; or generating the HARQ-ACK codebook by including the at least one HARQ feedback bit and no NDI corresponding to the HARQ process.
15. 15 . The apparatus of claim 12 , wherein the plurality of HARQ processes comprises a first HARQ process with HARQ feedback enabled and a second HARQ process with HARQ feedback disabled and generating the HARQ-ACK codebook comprises: generating the HARQ-ACK codebook by including a first HARQ feedback bit corresponding to the first HARQ process and a second HARQ feedback bit corresponding to the second HARQ process.
16. 16 . The apparatus of claim 15 , wherein the second HARQ feedback bit is located after the first HARQ feedback bit.
17. 17 . The apparatus of claim 15 , wherein the first and second HARQ feedback bits are ordered by HARQ process number of the first and second HARQ processes.
18. 18 . The apparatus of claim 12 , wherein the HARQ-ACK codebook is a Type-3 HARQ-ACK codebook.
19. 19 . The apparatus of claim 12 , wherein determining the HARQ feedback configurations of the plurality of HARQ processes based on the at least one SPS configuration comprises: for a HARQ process comprised in the plurality of HARQ processes, in response to the at least one SPS configuration indicating a first HARQ feedback configuration for the HARQ process and a further configuration indicating a second HARQ feedback configuration for the HARQ process, determining the HARQ feedback configuration of the HARQ process as one of the following: the first HARQ feedback configuration; the second HARQ feedback configuration; a third HARQ feedback configuration indicating that HARQ feedback is enabled for the HARQ process; or a fourth HARQ feedback configuration indicating that HARQ feedback is disabled for the HARQ process.
20. 20 . The apparatus of claim 12 , wherein generating the HARQ-ACK codebook for SPS PDSCH comprises: generating HARQ feedback bits for at least one HARQ process comprised in the plurality of HARQ processes, wherein HARQ feedback is enabled for the at least one HARQ process; ordering the HARQ feedback bits first by their corresponding serving cell indices, second by their corresponding HARQ process number and third by their corresponding SPS PDSCH reception slot number; and generating the HARQ-ACK codebook comprising the ordered HARQ-ACK bits.

Description

TECHNICAL FIELD Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to methods, devices and computer readable storage media for hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook handling. BACKGROUND 5G New Radio (NR) systems are expected to meet world market demands of accessing and delivering services anywhere and anytime. Non-Terrestrial Network (NTN) is able to satisfy requests of anywhere and anytime connection by offering wide-area coverage and ensuring service availability, continuity, and scalability. Therefore, NTN is expected to be integrated into 5G NR systems. SUMMARY In general, example embodiments of the present disclosure provide methods, devices and computer readable storage media for HARQ-ACK codebook handling. In a first aspect, there is provided a method. The method comprises determining, at a terminal device, respective hybrid automatic repeat request (HARQ) feedback configurations of a plurality of HARQ processes, wherein each HARQ feedback configuration indicates whether HARQ feedback is enabled or disabled for a corresponding HARQ process; and generating a HARQ-ACK codebook for Physical Downlink Shared Channel (PDSCH) based on the HARQ feedback configurations of the plurality of HARQ processes; and transmitting the HARQ-ACK codebook to a network device. In a second aspect, there is provided a method. The method comprises determining, at a network device, respective HARQ feedback configurations of a plurality of HARQ processes, wherein each HARQ feedback configuration indicates whether HARQ feedback is enabled or disabled for a corresponding HARQ process; and receiving, from a terminal device, a HARQ-ACK codebook for PDSCH generated based on the HARQ feedback configurations of the plurality of HARQ processes. In a third aspect, there is provided a method. The method comprises receiving, at a terminal device, downlink control information (DCI) related to a HARQ process from a network device, wherein the DCI comprises a counter downlink assignment indicator (DAI) field and a total DAI field, and the counter DAI field is reserved in response to HARQ feedback being disabled for the HARQ process; generating a HARQ-ACK codebook for PDSCH scheduled by the DCI, based on at least one of the counter DAI field and the total DAI field; and transmitting the HARQ-ACK codebook to the network device. In a fourth aspect, there is provided a method. The method comprises generating, at a network device, DCI related to a HARQ process, wherein the DCI comprises a counter DAI field and a total DAI field, and the counter DAI field is reserved in response to HARQ feedback being disabled for the HARQ process; transmitting the DCI to a terminal device; and receiving a HARQ-ACK codebook for PDSCH scheduled by the DCI from the terminal device, wherein the HARQ-ACK codebook is generated based on at least one of the counter DAI field and the total DAI field. In a fifth aspect, there is provided a method. The method comprises receiving, at a terminal device, DC related to a HARQ process with HARQ feedback disabled from a network device; generating, for a PDSCH reception corresponding to the DCI, a HARQ feedback bit indicating a positive acknowledgement; and transmitting a HARQ-ACK codebook comprising the HARQ feedback bit to the network device. In a sixth aspect, there is provided a method. The method comprises transmitting, from a network device to a terminal device, DCI related to a HARQ process with HARQ feedback disabled; and receiving a HARQ-ACK codebook from the terminal device, wherein the HARQ-ACK codebook comprises a HARQ feedback bit for a PDSCH reception corresponding to the DCI and the HARQ feedback bit indicates a positive acknowledgement. In a seventh aspect, there is provided a terminal device. The terminal device comprises a processor and a memory coupled to the processor. The memory stores instructions that when executed by the processor, cause the terminal device to perform the method according to the above first, third or fifth aspect of the present disclosure. In an eighth aspect, there is provided a network device. The network device comprises a processor and a memory coupled to the processor. The memory stores instructions that when executed by the processor, cause the network device to perform the method according to the above second, fourth or sixth aspect of the present disclosure. In a ninth aspect, there is provided a baseband processor of a terminal device configured to perform the method according to the above first, third or fifth aspect of the present disclosure. In a tenth aspect, there is provided a baseband processor of a network device configured to perform the method according to the above second, fourth or sixth aspect of the present disclosure. In an eleventh aspect, there is provided a computer readable storage medium comprising program instructions stored thereon. The instructions, when executed by an ap