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EP-3764733-B1 - DRX COMMUNICATION

EP3764733B1EP 3764733 B1EP3764733 B1EP 3764733B1EP-3764733-B1

Inventors

  • YOU, Chunhua
  • LIU, XING
  • ZHAO, LI

Dates

Publication Date
20260506
Application Date
20190325

Claims (11)

  1. A discontinuous reception communication method, wherein the method comprises: receiving (540), in an active time, wherein the active time is controlled by a timer T11, indication information sent by a network device, wherein the indication information comprises hybrid automatic repeat request, HARQ, feedback information for initial transmission or retransmission of data, and the timer T11 is started after the initial transmission or the retransmission of the data and is used to monitor a physical downlink control channel, PDCCH; stopping (550) the timer T11 to end the active time, based on that the indication information is a negative acknowledgment and the grant-free scheduling resource has been allocated, and determining (560), based on the indication information, whether to retransmit the data on a first grant-free scheduling resource, and characterized in that the initial transmission or the retransmission of the data is performed on a second grant-free scheduling resource.
  2. The method according to claim 1, wherein the indication information is downlink feedback information, DFI.
  3. The method according to any one of claims 1 to 2, wherein the indication information further comprises: a carrier indicator field, CIF, or transmit power control, TPC, or a carrier indicator field, CIF and transmit power control, TPC.
  4. The method according to any one of claims 1 to 3, wherein the indication information is scrambled by using a cell radio network temporary identifier, C-RNTI.
  5. A communications apparatus, comprising: a transceiver unit (910), configured to receive, in an active time, wherein the active time is controlled by a timer T11, indication information sent by a network device, wherein the indication information comprises hybrid automatic repeat request, HARQ, feedback information for initial transmission or retransmission of data, and the timer T11 is started after the initial transmission or the retransmission of the data and is used to monitor a physical downlink control channel, PDCCH; and a control unit (920), configured to stop the timer T11, based on that the indication information is a negative acknowledgment and the grant-free scheduling resource has been allocated, a determining unit (930), configured to determine, based on the received indication information, whether to retransmit data on a first grant-free scheduling resource, characterized in that the initial transmission or the retransmission of the data is performed on a second grant-free scheduling resource.
  6. The communications apparatus according to claim 5, wherein the indication information is downlink feedback information, DFI.
  7. The communications apparatus according to any one of claims 5 to 6, wherein the indication information further comprises: a carrier indicator field, CIF, or transmit power control, TPC, or a carrier indicator field, CIF and transmit power control, TPC.
  8. The communications apparatus according to any one of claims 5 to 7, wherein the indication information is scrambled by using a cell radio network temporary identifier, C-RNTI.
  9. A terminal device, comprising the communications apparatus according to any one of claims 5 to 8.
  10. A computer-readable storage medium, comprising an instruction, wherein when the instruction is run on a computer, the computer is enabled to perform the method according to any one of claims 1 to 4.
  11. A communications system, comprising the terminal device according to claim 9 and the network device, wherein the network device is configured to send the indication information to the terminal device.

Description

TECHNICAL FIELD Embodiments of the present invention relate to the communications field, and in particular, to a discontinuous reception communication method, communications apparatus, terminal device, computer-readable storage medium and a communications system. BACKGROUND A wireless communications system may provide various types of communication content such as voices, videos, packet data, message transfer, and broadcast. In the wireless communications system, a discontinuous reception (discontinuous reception, DRX) function may be used to reduce power usage of a terminal device in idle mode or in connected mode. DRX means that the terminal device enters a wake-up state only in an awake (awake) period, which is sometimes also referred to as an active time (active time). For example, the terminal device turns on a receiver to receive downlink data and signaling, and enters a sleep (sleep) state in another time. For example, the terminal device turns off the receiver to stop receiving downlink data and signaling. As technologies evolve, technologies such as preemption, grant free (grant free) scheduling, and hybrid automatic repeat request (hybrid automatic repeat request, HARQ) are gradually introduced into the wireless communications system. How these technologies are used together with a DRX function is a problem that needs to be resolved. The article from Ericsson: "Remaining issues on DRX timers", 3GPP Draft; R2-1713471 - Remaining Issues On DRX Timers, RAN WG2, Reno, Nevada, USA; 20171127 - 20171201 17 November 2017 (2017-11-17), XP051372179, refers to DRX timers. The EP 2 298 009 A1 refers to a method and an apparatus for controlling discontinuous reception in a wireless network. The EP 3 226 456 A1 refers to an asynchronous retransmission protocol. The US 2014 / 086 110 A1 refers to a method for counting timer for retransmission in a wireless communication system and an apparatus therefor. The article "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Medium Access Control (MAC) protocol specification (Release 15)", 3GPP STANDARD; Technical Specification; 3GPP TS 38.321, RAN WG2, V15.1.0, 2 April 2018, pages 1-67, XP051450732" refers to Medium Access Control (MAC) protocol specification (Release 15). The 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; 5GS; UE conformance specification; Part 1: Protocol conformance specification (Release 15)", 3GPP STANDARD; Technical Specification; 3GPP TS 38.523-1, RAN WG5, V0.2.0, 26 March 2018 (2018-03-26), pages 1-155, XP051450503 refers to UE conformance specification; Part 1: Protocol conformance specification (Release 15). The WO 2017 / 122135A1 refers to a method for controlling connected mode DRX connections. Patent application EP3716713 A1 discloses a DRX method using grant-free scheduling resources. SUMMARY The claimed invention defines a discontinuous reception communications method, communication apparatus, terminal device, computer-readable storage medium and a communications system, to reduce an active time of a terminal device in DRX mode during HARQ retransmission, and reduce power consumption. The embodiments of the present invention further provide a discontinuous reception communication method and communications apparatus, a communications device, and a communications system, so that a terminal device in DRX mode can update an available resource in time before sending data, thereby reducing a resource conflict during data sending and avoiding interference to another terminal device. The present application is defined in the appended independent claims. Further implementations are disclosed in the pending dependent claims. In the following, implementations not falling within the scope of the claims are to be understood as examples useful for understanding the application. According to a first aspect, a discontinuous reception communication method is provided, and may be applied to a terminal device. The method includes: receiving, during running of a timer T11, indication information sent by a network device, where the indication information includes HARQ feedback information for initial transmission or retransmission of data of the terminal device; andstopping the timer T11. The timer T11 is started after the initial transmission or the retransmission of the data and is used to monitor a physical downlink control channel PDCCH. In the foregoing method, the terminal device stops the timer T11 immediately when receiving the HARQ feedback information, and is allowed to enter a sleep state. In other words, the terminal device may enter the sleep state when no other condition that meets an active time is true. This shortens the active time of the terminal device in DRX mode, and reduces power consumption. With reference to the first aspect, in a first possible implementation of the first aspect, the method may further include: after the timer T11 is stopped, if a curren