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EP-4738742-A1 - TIMER STARTING METHOD AND APPARATUS

EP4738742A1EP 4738742 A1EP4738742 A1EP 4738742A1EP-4738742-A1

Abstract

The present disclosure provides a timer starting method, an apparatus, a device, and a storage medium. The method comprises: a physical downlink control channel (PDCCH) indicates a transmission block (TB) transmission of an uplink (UL) or a downlink (DL), and on the basis of at least one of a first configuration and a second configuration of a hybrid automatic repeat request (HARO), determines whether to stat a discontinuous reception inactivity timer (DRX inactivity timer). The present disclose can improve the stating accuracy of the DRX inactivity timer, improve the accuracy of blind retransmission monitoring, and improve the accuracy of TB retransmission.

Inventors

  • JIANG, XIAOWEI

Assignees

  • Beijing Xiaomi Mobile Software Co., Ltd.

Dates

Publication Date
20260506
Application Date
20230629

Claims (20)

  1. A method for starting a timer, comprising: determining whether to start a discontinuous reception (DRX) inactivity timer based on at least one of a first configuration or a second configuration of a hybrid automatic repeat request (HARQ), wherein a physical downlink control channel (PDCCH) indicates uplink (UL) or downlink (DL) transmission block (TB) transmission.
  2. The method of claim 1, wherein the first configuration of the HARQ is a downlink control information (DCI)-based HARQ mode configuration or a DCI-based HARQ feedback configuration, and the second configuration of the HARQ is a radio resource control (RRC)-based HARQ mode configuration or an RRC-based HARQ feedback configuration.
  3. The method of claim 1 or 2, wherein determining whether to start the DRX inactivity timer based on the at least one of the first configuration or the second configuration of the HARQ comprises: starting or not starting the DRX inactivity timer in a case where one or more of following situations is satisfied by the first configuration or by the second configuration: HARQ processes corresponding to all TBs being configured with HARQ feedback disabled or being configured with an HARQ mode B; only some of HARQ processes corresponding to all TBs being configured with HARQ feedback disabled or being configured with an HARQ mode B; or there being an HARQ process, among HARQ processes corresponding to all TBs, that is configured with HARQ feedback disabled or configured with an HARQ mode B; wherein the PDCCH indicates UL or DL multi-TB transmission.
  4. The method of claim 3, after starting the DRX inactivity timer, further comprising: not starting the DRX inactivity timer after an HARQ round-trip time (RTT) timer or a UL HARQ RTT timer of HARQ processes corresponding to the UL or DL multi-TB transmission expires.
  5. The method of claim 3, further comprising: starting the DRX inactivity timer after a last HARQ round-trip time (RTT) timer or a last UL HARQ RTT timer of HARQ processes corresponding to the UL or DL multi-TB transmission expires.
  6. The method of claim 3, further comprising: not starting the DRX inactivity timer, wherein the PDCCH indicates the UL or DL multi-TB transmission, and HARQ processes corresponding to all TBs are configured with HARQ feedback enabled or configured with an HARQ mode A.
  7. The method of claim 3, further comprising: starting or not starting the DRX inactivity timer, wherein the PDCCH indicates the UL or DL multi-TB transmission, and there is an HARQ process, corresponding to a TB among multiple TBs, that is configured with HARQ feedback enabled or configured with an HARQ mode A.
  8. The method of claim 1 or 2, wherein determining whether to start the DRX inactivity timer based on the at least one of the first configuration or the second configuration of the HARQ comprises: starting or not starting the DRX inactivity timer in a case where one or more of following situations is satisfied by the first configuration and by the second configuration: the first configuration being HARQ feedback enabled, and HARQ processes corresponding to all TBs being configured with HARQ feedback disabled via the second configuration or being configured with an HARQ mode B via the second configuration; the first configuration being the HARQ feedback enabled, and only some of HARQ processes corresponding to all TBs being configured with HARQ feedback disabled via the second configuration or being configured with an HARQ mode B via the second configuration; and the first configuration being the HARQ feedback enabled, and there being an HARQ process, among HARQ processes corresponding to all TBs, that is configured with HARQ feedback disabled via the second configuration or configured with an HARQ mode B via the second configuration; wherein the PDCCH indicates UL or DL multi-TB transmission.
  9. The method of claim 8, after starting the DRX inactivity timer, further comprising: not starting the DRX inactivity timer after an HARQ round-trip time (RTT) timer or a UL HARQ RTT timer of HARQ processes corresponding to the UL or DL multi-TB transmission expires.
  10. The method of claim 8, further comprising: starting the DRX inactivity timer after a last HARQ round-trip time (RTT) timer or a last UL HARQ RTT timer of HARQ processes corresponding to the UL or DL multi-TB transmission expires.
  11. The method of claim 2 or 3, wherein determining whether to start the DRX inactivity timer based on the at least one of the first configuration or the second configuration of the HARQ comprises: starting the DRX inactivity timer, wherein the first configuration indicates HARQ feedback disabled or indicates an HARQ mode B.
  12. The method of claim 2 or 3, wherein determining whether to start the DRX inactivity timer based on the at least one of the first configuration or the second configuration of the HARQ comprises: not starting the DRX inactivity timer, wherein the first configuration indicates an HARQ mode A.
  13. The method of claim 2 or 3, wherein determining whether to start the DRX inactivity timer based on the at least one of the first configuration or the second configuration of the HARQ comprises: in a case where the PDCCH indicates DL single-TB transmission, starting the DRX inactivity timer in a case where one of following occurs: the first configuration indicating HARQ feedback enabled for an HARQ process of DL transmission; an HARQ process being configured with HARQ feedback disabled via the second configuration; or a terminal being a narrow band Internet of Things (NB-IoT) terminal and being only configured with one HARQ process.
  14. The method of claim 2 or 3, further comprising: for UL or DL multi-TB transmission, not starting the DRX inactivity timer, wherein the first configuration and the second configuration are not determined, and an HARQ round-trip time (RTT) timer or a UL HARQ RTT timer of HARQ processes corresponding to multiple TBs expires.
  15. A method for starting a timer, comprising: sending at least one of a first configuration or a second configuration of a hybrid automatic repeat request (HARQ) to a terminal, wherein a physical downlink control channel (PDCCH) indicates uplink (UL) or downlink (DL) transmission block (TB) transmission, and the at least one of the first configuration or the second configuration of the HARQ is used for determining whether to start a discontinuous reception (DRX) inactivity timer.
  16. A terminal, comprising: a processing module, configured to determine whether to start a discontinuous reception (DRX) inactivity timer based on at least one of a first configuration or a second configuration of a hybrid automatic repeat request (HARQ), wherein a physical downlink control channel (PDCCH) indicates uplink (UL) or downlink (DL) transmission block (TB) transmission.
  17. A network device, comprising: a transceiver module, configured to send at least one of a first configuration or a second configuration of a hybrid automatic repeat request (HARQ) to a terminal, wherein a physical downlink control channel (PDCCH) indicates uplink (UL) or downlink (DL) transmission block (TB) transmission, and the at least one of the first configuration or the second configuration of the HARQ is used for determining whether to start a discontinuous reception (DRX) inactivity timer.
  18. A terminal, comprising: one or more processors, wherein the terminal is configured to implement the method for starting a timer of any one of claims 1 to 14.
  19. A network device, comprising: one or more processors, wherein the network device is configured to implement the method for starting a timer of claim 15.
  20. A communication system, comprising a terminal and a network device, wherein the terminal is configured to implement the method for starting a timer of any one of claims 1 to 14, and the network device is configured to implement the method for starting a timer of claim 15.

Description

TECHNICAL FIELD The disclosure relates to a field of communication technology, and in particular to methods and apparatuses for starting a timer, a device, and a storage medium. BACKGROUND In a communication system, an Internet of Things (IOT) non-terrestrial network (NTN) is an important technology introduced in mobile communication technology, which provides wireless resources via satellites (or unmanned aerial vehicle (UAV)) instead of terrestrial base stations. In this communication system, for example, in a case where a hybrid automatic repeat request (HARQ) round-trip time (RTT) timer expires, and where data received in an HARQ process corresponding to the HARQ RTT timer is not successfully decoded, a discontinuous reception (DRX) inactivity timer may be started for the HARQ process. SUMMARY The disclosure provides methods and apparatuses for starting a timer, a device, and a storage medium, to solve a problem of inaccurate start of a discontinuous reception (DRX) inactivity timer, which leads to low accuracy of transmission block (TB) retransmission. According to a first aspect of the embodiments of the disclosure, there is provided a method for starting a timer, including: determining whether to start a DRX inactivity timer based on at least one of a first configuration or a second configuration of a hybrid automatic repeat request (HARQ), in which a physical downlink control channel (PDCCH) indicates uplink (UL) or downlink (DL) TB transmission. According to a second aspect of the embodiments of the disclosure, there is provided a method for starting a timer, including: sending at least one of a first configuration or a second configuration of an HARQ to a terminal, in which a PDCCH indicates UL or DL TB transmission, and in which the at least one of the first configuration or the second configuration of the HARQ is used for determining whether to start a DRX inactivity timer. According to a third aspect of the embodiments of the disclosure, there is provided a terminal, including a processing module configured to determine whether to start a DRX inactivity timer based on at least one of a first configuration or a second configuration of an HARQ, in which a PDCCH indicates UL or DL TB transmission. According to a fourth aspect of the embodiments of the disclosure, there is provided a network device, including a transceiver module configured to send at least one of a first configuration or a second configuration of an HARQ to a terminal, in which a PDCCH indicates UL or DL TB transmission, and in which the at least one of the first configuration or the second configuration of the HARQ is used for determining whether to start a DRX inactivity timer. According to a fifth aspect of the embodiments of the disclosure, there is provided a terminal, including: one or more processors, in which the one or more processors are configured to implement the method for starting a timer according to any one of the first aspect. According to a sixth aspect of the embodiments of the disclosure, there is provided a network device, including: one or more processors, in which the one or more processors are configured to implement the method for starting a timer according to the second aspect. According to a seventh aspect of the embodiments of the disclosure, there is provided a communication system, including a terminal and a network device, in which the terminal is configured to implement the method for starting a timer according to any one of the first aspect, and the network device is configured to implement the method for starting a timer according to the second aspect. According to an eighth aspect of the embodiments of the disclosure, there is provided a storage medium having instructions stored thereon. When the instructions are running on a communication device, the communication device is caused to implement the method for starting a timer according to any one of the first aspect or the method for starting a timer according to the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS The above and/or other aspects and advantages of the embodiments of the disclosure will become apparent and more readily appreciated from the following descriptions in combination of the accompanying drawings. FIG. 1 is a schematic diagram illustrating an architecture of a communication system according to embodiments of the disclosure.FIG. 2 is a block diagram illustrating a system for maintaining wireless connection according to embodiments of the disclosure.FIG. 3 is a block diagram illustrating an example of a transparent transmission mode according to embodiments of the disclosure.FIG. 4 is a block diagram illustrating an example of a retransmission mode according to embodiments of the disclosure.FIG. 5 is a schematic diagram illustrating an interaction of a method for starting a timer according to another embodiment of the disclosure.FIG. 6A is a flowchart illustrating a method for starting a timer according to another embodiment