HARQ-ACK codebook handling
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.
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 . 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 . 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 . 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 . The method of claim 4 , wherein the second HARQ feedback bit is located after the first HARQ feedback bit.
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 . The method of claim 1 , wherein the HARQ-ACK codebook is a Type-3 HARQ-ACK codebook.
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 . 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 . 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 . 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 . 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 . 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 . 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 . 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 . The apparatus of claim 15 , wherein the second HARQ feedback bit is located after the first HARQ feedback bit.
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 . The apparatus of claim 12 , wherein the HARQ-ACK codebook is a Type-3 HARQ-ACK codebook.
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 . 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.