Communication Method And Apparatus

Abstract

A terminal device detects first DCI on a first PDCCH monitoring occasion, detects second DCI on a second PDCCH monitoring occasion, generates a hybrid automatic repeat request acknowledgement HARQ-ACK codebook based on the first PDCCH monitoring occasion and a DAI indication carried in at least one of the first DCI and the second DCI, and sends the HARQ-ACK codebook. The first DCI and the second DCI are for scheduling a same transport block TB, and the first DCI and the second DCI carry a same downlink assignment index DAI indication.

Description

Claims

1-27. (canceled)

28. A method, comprising: detecting, by a terminal device, first downlink control information (DCI) on a first physical downlink control channel (PDCCH) monitoring occasion, and detecting second DCI on a second PDCCH monitoring occasion, wherein the first DCI and the second DCI schedule a same transport block (TB), and the first DCI and the second DCI carry a same downlink assignment index (DAI) indication;generating, by the terminal device, a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook based on the first PDCCH monitoring occasion and the DAI indication carried in at least one DCI of the first DCI and the second DCI; andsending, by the terminal device, the HARQ-ACK codebook.

29. The method according to claim 28, wherein generating, by the terminal device, the HARQ-ACK codebook based on the first PDCCH monitoring occasion and the DAI indication carried in at least one DCI of the first DCI and the second DCI comprises: determining, by the terminal device based on the first PDCCH monitoring occasion and the DAI indication carried in the at least one DCI of the first DCI and the second DCI, a HARQ-ACK bit corresponding to the TB that is in the HARQ-ACK codebook.

30. The method according to claim 28, wherein the first DCI and the second DCI correspond to a same bit in the HARQ-ACK codebook.

31. The method according to claim 28, wherein the DAI indication carried in the first DCI and the DAI indication carried in the second DCI are determined based on an index value of the first PDCCH monitoring occasion.

32. The method according to claim 28, wherein an index value of the first PDCCH monitoring occasion is less than an index value of the second PDCCH monitoring occasion.

33. The method according to claim 28, further comprising: before sending, by the terminal device, the HARQ-ACK codebook, receiving configuration information, wherein the configuration information indicates that a first PDCCH candidate and a second PDCCH candidate have an association relationship, the first DCI corresponds to the first PDCCH candidate, and the second DCI corresponds to the second PDCCH candidate;determining a group of DCI, wherein the group of DCI comprises the first DCI or the second DCI, and HARQ-ACK feedback information corresponding to the group of DCI is fed back on a same physical uplink control channel (PUCCH) resource;sorting the group of DCI, wherein an order of the first DCI or the second DCI in the group of DCI is determined based on the first monitoring occasion; anddetermining target DCI from the group of DCI based on an order of each DCI of the group of DCI, wherein the target DCI indicates the same PUCCH resource.

34. A chip, wherein the chip is coupled to a memory, and is configured to read and execute program instructions stored in the memory, to implement the method according to claim 28.

35. A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and when the instructions are run on a computer, the computer is caused to perform the method according to claim 28.

36. A computer program product, wherein when the computer program product is invoked by a computer, the computer is caused to perform the method according to claim 28.

37. A method, comprising: sending, by a network device, first downlink control information (DCI) on a first physical downlink control channel (PDCCH) monitoring occasion, and sending second DCI on a second PDCCH monitoring occasion, wherein the first DCI and the second DCI schedule a same transport block (TB), and the first DCI and the second DCI carry a same downlink assignment index (DAI) indication;receiving, by the network device, a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook sent by a terminal device; anddetermining, by the network device based on the first PDCCH monitoring occasion and the DAI indication carried in at least one DCI of the first DCI and the second DCI, HARQ-ACK feedback information corresponding to the TB that is in the HARQ-ACK codebook.

38. The method according to claim 37, wherein determining, by the network device based on the first PDCCH monitoring occasion and the DAI indication carried in the at least one DCI of the first DCI and the second DCI, the HARQ-ACK feedback information corresponding to the TB in the HARQ-ACK codebook comprises: determining, by the network device based on the first PDCCH monitoring occasion and the DAI indication carried in the at least one DCI of the first DCI and the second DCI, a HARQ-ACK bit corresponding to the TB in the HARQ-ACK codebook.

39. The method according to claim 37, wherein the first DCI and the second DCI correspond to a same bit in the HARQ-ACK codebook.

40. The method according to claim 37, wherein the DAI indication carried in the first DCI and the DAI indication carried in the second DCI are determined based on an index value of the first PDCCH monitoring occasion.

41. The method according to claim 37, wherein an index value of the first PDCCH monitoring occasion is less than an index value of the second PDCCH monitoring occasion.

42. The method according to claim 37, further comprising: sending configuration information, wherein the configuration information indicates that a first PDCCH candidate and a second PDCCH candidate have an association relationship, the first DCI corresponds to the first PDCCH candidate, and the second DCI corresponds to the second PDCCH candidate;determining a group of DCI, wherein the group of DCI comprises the first DCI or the second DCI, and HARQ-ACK feedback information corresponding to the group of DCI is fed back on a same physical uplink control channel (PUCCH) resource;sorting the group of DCI, wherein an order of the first DCI or the second DCI in the group of DCI is determined based on the first monitoring occasion; anddetermining target DCI from the group of DCI based on an order of each DCI of the group of DCI, wherein the target DCI indicates the PUCCH resource.

43. An apparatus, comprising: at least one processor, wherein the at least one processor is connected to a memory storing a program, the at least one processor is configured to read and execute the program stored in the memory, wherein executing the program causes the apparatus to perform the following operations: detecting first downlink control information (DCI) on a first physical downlink control channel (PDCCH) monitoring occasion, and detecting second DCI on a second PDCCH monitoring occasion, wherein the first DCI and the second DCI schedule a same transport block (TB), and the first DCI and the second DCI carry a same downlink assignment index (DAI) indication;generating a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook based on the first PDCCH monitoring occasion and the DAI indication carried in at least one DCI of the first DCI and the second DCI; andsending the HARQ-ACK codebook.

44. The apparatus according to claim 43, wherein generating the HARQ-ACK codebook based on the first PDCCH monitoring occasion and the DAI indication carried in the at least one DCI of the first DCI and the second DCI comprises: determining, based on the first PDCCH monitoring occasion and the DAI indication carried in the at least one DCI of the first DCI and the second DCI, a HARQ-ACK bit corresponding to the TB in the HARQ-ACK codebook.

45. The apparatus according to claim 43, wherein the first DCI and the second DCI correspond to a same bit in the HARQ-ACK codebook.

46. The apparatus according to claim 43, wherein the DAI indication carried in the first DCI and the DAI indication carried in the second DCI are determined based on an index value of the first PDCCH monitoring occasion.

47. The apparatus according to claim 43, wherein an index value of the first PDCCH monitoring occasion is less than an index value of the second PDCCH monitoring occasion.

48. The apparatus according to claim 43, wherein executing the program causes the apparatus to perform the following further operations: before sending the HARQ-ACK codebook, receive configuration information, wherein the configuration information indicates that a first PDCCH candidate and a second PDCCH candidate have an association relationship, the first DCI corresponds to the first PDCCH candidate, and the second DCI corresponds to the second PDCCH candidate;determine a group of DCI, wherein the group of DCI comprises the first DCI or the second DCI, and HARQ-ACK feedback information corresponding to the group of DCI is fed back on a same physical uplink control channel (PUCCH) resource;sort the group of DCI, wherein an order of the first DCI or the second DCI in the group of DCI is determined based on the first monitoring occasion; anddetermine target DCI from the group of DCI based on an order of each DCI of the group of DCI, wherein the target DCI indicates the PUCCH resource.

49. An apparatus, comprising: at least one processor, wherein the at least one processor is connected to a memory storing a program, the at least one processor is configured to read and execute the program stored in the memory, wherein executing the program causes the apparatus to perform the following operations: sending first downlink control information (DCI) on a first physical downlink control channel (PDCCH) monitoring occasion, and sending second DCI on a second PDCCH monitoring occasion, wherein the first DCI and the second DCI schedule a same transport block (TB), and the first DCI and the second DCI carry a same downlink assignment index (DAI) indication;receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook sent by a terminal device; anddetermining, based on the first PDCCH monitoring occasion and the DAI indication carried in at least one DCI of the first DCI and the second DCI, HARQ-ACK feedback information corresponding to the TB in the HARQ-ACK codebook.

50. The apparatus according to claim 49, wherein executing the program causes the apparatus to perform the following further operations: determine, based on the first PDCCH monitoring occasion and the DAI indication carried in at least one DCI of the first DCI and the second DCI, a HARQ-ACK bit corresponding to the TB in the HARQ-ACK codebook.

51. The apparatus according to claim 49, wherein the first DCI and the second DCI correspond to a same bit in the HARQ-ACK codebook.

52. The apparatus according to claim 49, wherein the DAI indication carried in the first DCI and the DAI indication carried in the second DCI are determined based on an index value of the first PDCCH monitoring occasion.

53. The apparatus according to claim 49, wherein an index value of the first PDCCH monitoring occasion is less than an index value of the second PDCCH monitoring occasion.

54. The apparatus according to claim 49, wherein executing the program causes the apparatus to perform the following further operations: send configuration information, wherein the configuration information indicates that a first PDCCH candidate and a second PDCCH candidate have an association relationship, the first DCI corresponds to the first PDCCH candidate, and the second DCI corresponds to the second PDCCH candidate;determine a group of DCI, wherein the group of DCI comprises the first DCI or the second DCI, and HARQ-ACK feedback information corresponding to the group of DCI is fed back on a same physical uplink control channel (PUCCH) resource;sort the group of DCI, wherein an order of the first DCI or the second DCI in the group of DCI is determined based on the first monitoring occasion; anddetermine target DCI from the group of DCI based on an order of each DCI of the group of DCI, wherein the target DCI indicates the PUCCH resource.