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EP-4742770-A1 - COMMUNICATION METHOD AND APPARATUS, AND STORAGE MEDIUM AND COMPUTER PROGRAM PRODUCT

EP4742770A1EP 4742770 A1EP4742770 A1EP 4742770A1EP-4742770-A1

Abstract

This application discloses a communication method and apparatus, a storage medium, and a computer program product, and relates to the field of communication technologies, to cause a terminal apparatus to stop PDCCH blind detection in some durations, thereby reducing power consumption of the terminal apparatus. In this application, the terminal apparatus performs blind detection on a PDCCH. The PDCCH is used to schedule first data in an i th transmission, where i is a positive integer less than or equal to N 0 , N 0 is a quantity of allowed transmissions of the first data, and N 0 is a positive integer greater than 1. After successfully decoding a PDCCH or a PDSCH, the terminal apparatus stops PDCCH blind detection in a first duration, and sends first information. The first information includes: information indicating that the first data is successfully decoded, or the first data. Because the terminal apparatus may stop PDCCH blind detection, power consumption of the terminal apparatus can be reduced.

Inventors

  • WANG, XIAOLU
  • LUO, Hejia
  • WANG, JUN
  • MA, JIANGLEI

Assignees

  • Huawei Technologies Co., Ltd.

Dates

Publication Date
20260513
Application Date
20230905

Claims (20)

  1. A communication method, wherein the method is applicable to a terminal apparatus, and the method comprises: performing blind detection on a physical downlink control channel PDCCH, wherein the PDCCH is used to schedule first data in an i th transmission, i is a positive integer less than or equal to N 0 , N 0 is a quantity of allowed transmissions of the first data, and N 0 is a positive integer greater than 1; and after the PDCCH is successfully decoded, stopping PDCCH blind detection in a first duration, and sending first information, wherein the first information comprises: information indicating that the first data is successfully decoded, or the first data.
  2. The method according to claim 1, wherein information used for determining the first duration comprises one or more of the following content: N 0 ; a duration corresponding to N 0 transmissions of the first data; a time interval between two adjacent transmissions of the first data; a time interval between two adjacent PDCCHs; or m, wherein m is a first quantity of PDCCHs on which PDCCH blind detection is stopped.
  3. The method according to claim 2, wherein the first duration comprises a corresponding duration from an (i+1) th transmission to an (i+k) th transmission of the first data, k is determined based on m and N 1 , N 1 is a quantity of remaining allowed transmissions of the first data, and N 1 is 0 or a positive integer less than N 0 ; or the first duration comprises a corresponding duration between a PDCCH used to schedule the (i+1) th transmission of the first data and a PDCCH used to schedule the (i+k) th transmission of the first data.
  4. The method according to any one of claims 1 to 3, wherein the information used for determining the first duration comprises one or more of the following content: a timing advance; an offset (K_mac) between downlink frame timing and uplink frame timing; a scheduling offset (K_offset); a data processing delay (Δt), wherein the data processing delay (Δt) means a processing delay of at least one of a PDCCH, a PDSCH, or a PUSCH; a downlink scheduling delay (k 0 ), wherein the downlink scheduling delay (k 0 ) indicates a delay of a PDSCH scheduled by using a PDCCH; a first feedback delay (k 1 ), wherein the first feedback delay (k 1 ) indicates a delay of feedback information corresponding to a PDSCH scheduled by using a PDCCH in a second communication system; or a first uplink scheduling delay (k 2 ), wherein the first uplink scheduling delay (k 2 ) indicates a delay of a PUSCH scheduled by using a PDCCH in a second communication system.
  5. The method according to claim 4, wherein the information used for determining the first duration comprises one or more of the following content: a second feedback delay, wherein the second feedback delay indicates a delay of feedback information corresponding to a PDSCH scheduled by using a PDCCH in a first communication system; a second uplink scheduling delay, wherein the second uplink scheduling delay indicates a delay of a PUSCH scheduled by using a PDCCH in a first communication system; a second duration, wherein the second duration is determined based on a duration between a time at which the PDCCH is successfully decoded and a transmission end time of a PDCCH used to schedule an N 0 th transmission of the first data, or the second duration is determined based on a duration between a time at which the PDSCH is successfully decoded and a transmission end time of a physical downlink shared channel PDSCH used to schedule an N 0 th transmission of the first data; or a third duration, wherein the third duration is determined based on at least one of the timing advance, the offset (K_mac) between the downlink frame timing and the uplink frame timing, or the data processing delay (Δt).
  6. The method according to any one of claims 1 to 5, wherein the method further comprises: receiving first configuration information, wherein the first configuration information comprises the information used for determining the first duration; and determining the first duration based on the information used for determining the first duration.
  7. The method according to any one of claims 1 to 6, wherein sending the first information comprises: sending the first information on a first resource; and sending the first information on a second resource, wherein when the first resource comprises a feedback resource of the first data in the i th transmission, the second resource comprises a feedback resource of the first data in an (i+a) th transmission, the first information comprises information indicating that the first data is successfully decoded, a is a positive integer, and (i+a) is less than or equal to N 0 ; and when the first resource comprises a resource of the first data in the i th transmission, the second resource comprises a resource of the first data in the (i+a) th transmission, the first information comprises the first data.
  8. A communication method, wherein the method is applicable to a network apparatus, and the method comprises: sending a physical downlink control channel PDCCH, wherein the PDCCH is used to schedule first data in an i th transmission, i is a positive integer less than or equal to N 0 , N 0 is a quantity of allowed transmissions of the first data, and N 0 is a positive integer greater than 1; sending first configuration information, wherein the first configuration information comprises information used for determining a first duration, and the first configuration information is used by a terminal apparatus to stop PDCCH blind detection in the first duration after the PDCCH is successfully decoded; and receiving first information, wherein the first information comprises: information indicating that the first data is successfully decoded, or the first data.
  9. The method according to claim 8, wherein the information used for determining the first duration comprises one or more of the following content: N 0 ; a duration corresponding to N 0 transmissions of the first data; a time interval between two adjacent transmissions of the first data; a time interval between two adjacent PDCCHs; or m, wherein m is a first quantity of PDCCHs on which PDCCH blind detection is stopped.
  10. The method according to claim 9, wherein the first duration comprises a corresponding duration from an (i+1) th transmission to an (i+k) th transmission of the first data, k is determined based on m and N 1 , N 1 is a quantity of remaining allowed transmissions of the first data, and N 1 is 0 or a positive integer less than N 0 ; or the first duration comprises a corresponding duration between a PDCCH used to schedule the (i+1) th transmission of the first data and a PDCCH used to schedule the (i+k) th transmission of the first data.
  11. The method according to any one of claims 8 to 10, wherein the information used for determining the first duration comprises one or more of the following content: a timing advance; an offset (K_mac) between downlink frame timing and uplink frame timing; a scheduling offset (K_offset); a data processing delay (Δt), wherein the data processing delay (Δt) means a processing delay of at least one of a PDCCH, a PDSCH, or a PUSCH; a downlink scheduling delay (k 0 ), wherein the downlink scheduling delay (k 0 ) indicates a delay of a PDSCH scheduled by using a PDCCH; a first feedback delay (k 1 ), wherein the first feedback delay (k 1 ) indicates a delay of feedback information corresponding to a PDSCH scheduled by using a PDCCH in a second communication system; or a first uplink scheduling delay (k 2 ), wherein the first uplink scheduling delay (k 2 ) indicates a delay of a PUSCH scheduled by using a PDCCH in a second communication system.
  12. The method according to claim 11, wherein the information used for determining the first duration comprises one or more of the following content: a second feedback delay, wherein the second feedback delay indicates a delay of feedback information corresponding to a PDSCH scheduled by using a PDCCH in a first communication system; a second uplink scheduling delay, wherein the second uplink scheduling delay indicates a delay of a PUSCH scheduled by using a PDCCH in a first communication system; a second duration, wherein the second duration is determined based on a duration between a time at which the PDCCH is successfully decoded and a transmission end time of a PDCCH in an N 0 th transmission, or the second duration is determined based on a duration between a time at which the PDSCH is successfully decoded and a transmission end time of a PDSCH in an N 0 th transmission; or a third duration, wherein the third duration is determined based on at least one of the timing advance, the offset (K_mac) between the downlink frame timing and the uplink frame timing, or the data processing delay (Δt).
  13. The method according to any one of claims 8 to 12, wherein receiving the first information comprises: receiving the first information on a first resource; and receiving the first information on a second resource, wherein when the first resource comprises a feedback resource of the first data in the i th transmission, the second resource comprises a feedback resource of the first data in an (i+a) th transmission, the first information comprises information indicating that the first data is successfully decoded, a is a positive integer, and (i+a) is less than or equal to N 0 ; and when the first resource comprises a resource of the first data in the i th transmission, the second resource comprises a resource of the first data in the (i+a) th transmission, the first information comprises the first data.
  14. A communication apparatus, wherein the apparatus comprises a processor and an interface circuit, wherein the processor is configured to: perform blind detection on a physical downlink control channel PDCCH, wherein the PDCCH is used to schedule first data in an i th transmission, i is a positive integer less than or equal to N 0 , N 0 is a quantity of allowed transmissions of the first data, and N 0 is a positive integer greater than 1; and after the PDCCH is successfully decoded, stop PDCCH blind detection in a first duration, and send first information by using the interface circuit, wherein the first information comprises: information indicating that the first data is successfully decoded, or the first data.
  15. The apparatus according to claim 14, wherein information used for determining the first duration comprises one or more of the following content: N 0 ; a duration corresponding to N 0 transmissions of the first data; a time interval between two adjacent transmissions of the first data; a time interval between two adjacent PDCCHs; or m, wherein m is a first quantity of PDCCHs on which PDCCH blind detection is stopped.
  16. The apparatus according to claim 15, wherein the first duration comprises a corresponding duration from an (i+1) th transmission to an (i+k) th transmission of the first data, k is determined based on m and N 1 , N 1 is a quantity of remaining allowed transmissions of the first data, and N 1 is 0 or a positive integer less than N 0 ; or the first duration comprises a corresponding duration between a PDCCH used to schedule the (i+1) th transmission of the first data and a PDCCH used to schedule the (i+k) th transmission of the first data.
  17. The apparatus according to any one of claims 14 to 16, wherein the information used for determining the first duration comprises one or more of the following content: a timing advance; an offset (K_mac) between downlink frame timing and uplink frame timing; a scheduling offset (K_offset); a data processing delay (Δt), wherein the data processing delay (Δt) means a processing delay of at least one of a PDCCH, a PDSCH, or a PUSCH; a downlink scheduling delay (k 0 ), wherein the downlink scheduling delay (k 0 ) indicates a delay of a PDSCH scheduled by using a PDCCH; a first feedback delay (k 1 ), wherein the first feedback delay (k 1 ) indicates a delay of feedback information corresponding to a PDSCH scheduled by using a PDCCH in a second communication system; or a first uplink scheduling delay (k 2 ), wherein the first uplink scheduling delay (k 2 ) indicates a delay of a PUSCH scheduled by using a PDCCH in a second communication system.
  18. The apparatus according to claim 17, wherein the information used for determining the first duration comprises one or more of the following content: a second feedback delay, wherein the second feedback delay indicates a delay of feedback information corresponding to a PDSCH scheduled by using a PDCCH in a first communication system; a second uplink scheduling delay, wherein the second uplink scheduling delay indicates a delay of a PUSCH scheduled by using a PDCCH in a first communication system; a second duration, wherein the second duration is determined based on a duration between a time at which the PDCCH is successfully decoded and a transmission end time of a PDCCH used to schedule an N 0 th transmission of the first data, or the second duration is determined based on a duration between a time at which the PDSCH is successfully decoded and a transmission end time of a physical downlink shared channel PDSCH used to schedule an N 0 th transmission of the first data; or a third duration, wherein the third duration is determined based on at least one of the timing advance, the offset (K_mac) between the downlink frame timing and the uplink frame timing, or the data processing delay (Δt).
  19. The apparatus according to any one of claims 14 to 18, wherein the processor is further configured to: receive first configuration information by using the interface circuit, wherein the first configuration information comprises the information used for determining the first duration; and determine the first duration based on the information used for determining the first duration.
  20. The apparatus according to any one of claims 14 to 19, wherein the interface circuit is specifically configured to: send the first information on a first resource; and send the first information on a second resource, wherein when the first resource comprises a feedback resource of the first data in the i th transmission, the second resource comprises a feedback resource of the first data in an (i+a) th transmission, the first information comprises information indicating that the first data is successfully decoded, a is a positive integer, and (i+a) is less than or equal to N 0 ; and when the first resource comprises a resource of the first data in the i th transmission, the second resource comprises a resource of the first data in the (i+a) th transmission, the first information comprises the first data.

Description

TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to a communication method and apparatus, a storage medium, and a computer program product. BACKGROUND Currently, a 5th generation mobile network (the 5th generation, 5G) new radio (new radio, NR) technology is evolving from Release R18 to Release R19. In addition, the NR technology also enters a commercial deployment phase from a standardization phase. The NR standard protocol can be used for wireless communication technologies designed for terrestrial cellular network scenarios, and can provide users with wireless communication services featuring ultra-low latency, ultra-high reliability, ultra-high speed, and ultra-large connection. In comparison with terrestrial communication, non-terrestrial network (non-terrestrial network, NTN) communication has features such as a large coverage area and flexible networking, and can achieve seamless global network coverage. NTN communication includes networking by using devices such as an uncrewed aerial vehicle, a high-altitude platform, and a satellite, to provide services such as data transmission and voice communication for user equipment (user equipment, UE). In some communication scenarios (for example, NR or NTN), data transmission between apparatuses is affected, and consequently, a series of problems are caused. For example, in a satellite mobile communication scenario, when a mobile terminal transmits data to a satellite, signals are affected by sudden/short-time blocking caused by a guideboard, a street lamp, and the like. As a result, a signal to noise ratio (signal to noise ratio, SNR) of a link suddenly decreases, and a blocking duration may reach tens of milliseconds (millisecond, ms), causing problems such as an error floor (error floor), a fluctuant data transmission rate, and an increased quantity (probability) of data retransmissions. To alleviate impact of burst blocking in a satellite mobile communication scenario, a data retransmission mechanism is usually used currently. For example, in the satellite mobile communication scenario, a satellite may schedule retransmission of a same physical downlink shared channel (physical downlink shared channel, PDSCH) by using a plurality of physical downlink control channels (physical downlink control channel, PDCCH). Alternatively, the satellite may schedule uplink data transmission by using a plurality of PDCCHs, and a mobile terminal repeatedly transmits, based on scheduling performed by using the plurality of PDCCHs, same data on physical uplink shared channels (physical uplink shared channel, PUSCH) scheduled by using the plurality of PDCCHs. In a retransmission mechanism, how to further reduce power consumption of a communication apparatus becomes a problem to be urgently resolved. SUMMARY This application provides a communication method and apparatus, a storage medium, and a computer program product, to cause a terminal apparatus to stop PDCCH blind detection in some durations, thereby reducing power consumption of the terminal apparatus. According to a first aspect, this application provides a communication method. The method is performed by a terminal apparatus. The terminal apparatus may be a terminal, or may be a unit, a module, or a chip in a terminal. In the method, the terminal apparatus performs blind detection on a PDCCH. The PDCCH is used to schedule first data in an ith transmission, where i is a positive integer less than or equal to N0, N0 is a quantity of allowed transmissions of the first data, and N0 is a positive integer greater than 1. After successfully decoding a PDCCH, the terminal apparatus stops PDCCH blind detection in a first duration, and sends first information. The first information includes: information indicating that the first data is successfully decoded, or the first data. Because the terminal apparatus may stop PDCCH blind detection, power consumption of the terminal apparatus can be reduced. In a possible implementation, in some scenarios in which a transmission delay is relatively large, for example, in a first communication system (for example, an NTN), a relatively long delay may be taken for first information sent by the terminal apparatus after the terminal apparatus successfully decodes a PDCCH or a PDSCH to reach the network apparatus. Before receiving the first information, the network apparatus may consider that the terminal apparatus fails to decode the PDCCH or the PDSCH. Therefore, the network apparatus may schedule retransmission of the first data by using one or more PDCCHs. However, for the terminal apparatus, the terminal apparatus has successfully decoded the PDCCH or the PDSCH. Therefore, PDCCH blind detection may not be performed on the PDCCH that is subsequently used to schedule retransmission of the first data, thereby reducing power consumption of the terminal apparatus. In another possible implementation, the terminal apparatus resumes PDCCH b