Timer start-up method and apparatus

Abstract

The present disclosure provides a timer start-up method and apparatus, a device, and a storage medium. The method comprises: a physical downlink control channel (PDCCH) indicates link transmission, and, on the basis of at least one configuration among a hybrid automatic repeat request (HARQ) mode configuration and a HARQ feedback configuration of the PDCCH, determines whether to start up a HARQ round trip time (RTT) timer corresponding to the link transmission. In the present disclosure, the accuracy in starting up a HARQ RTT timer can be improved, the accuracy of HARQ initiation is improved, and the accuracy of TB retransmission is improved.

Description

Timer starting method and device Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a timer starting method, apparatus, device, and storage medium. Background Art

[0002] In communications systems, non-terrestrial networks (NTNs) are an important technology introduced in mobile communications. They provide wireless resources via satellites (or drones) rather than ground base stations. In such systems, for example, the retransmission schedule can be monitored by starting a Hybrid Automatic Repeat reQuest (HARQ) Round-Trip Time (RRT) timer.

[0003] Summary of the Invention

[0004] The present disclosure proposes a timer activation method, apparatus, device, and storage medium to solve the problem of inaccurate HARQ RTT timer activation resulting in low transmission block (TB) retransmission accuracy.

[0005] According to a first aspect of an embodiment of the present disclosure, a timer starting method is proposed, the method comprising:

[0006] A physical downlink control channel (PDCCH) indicates link transmission, and based on at least one of a hybrid automatic repeat request HARQ mode configuration and a hybrid automatic repeat request HARQ feedback configuration of the PDCCH, determines whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission.

[0007] According to a second aspect of an embodiment of the present disclosure, a timer starting method is proposed, the method comprising:

[0008] A physical downlink control channel (PDCCH) indicates link transmission, and sends at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ feedback) configuration of the PDCCH to the terminal, wherein at least one of the HARQ mode configuration and the HARQ feedback configuration is used to determine whether to start a hybrid automatic repeat request round-trip time timer corresponding to the link transmission.

[0009] According to a third aspect of an embodiment of the present disclosure, a terminal is provided, the device including:

[0010] A processing module is configured to determine whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH when the link transmission is indicated by a physical downlink control channel PDCCH.

[0011] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, the device including:

[0012] a transceiver module, configured to use a physical downlink control channel (PDCCH) to indicate link transmission, and to send at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ feedback) configuration of the PDCCH to a terminal, wherein at least one of the HARQ mode configuration and the HARQ feedback configuration is used to determine whether to start a hybrid automatic repeat request round trip timer corresponding to the link transmission.

[0013] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0014] one or more processors;

[0015] The terminal is used to execute the timer starting method described in any one of the first aspects.

[0016] According to a sixth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0017] one or more processors;

[0018] Wherein, the terminal is used to execute the timer starting method described in the second aspect.

[0019] According to the seventh aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a terminal and a network device, wherein the terminal is configured to implement the timer start method described in any one of the first aspects, and the network device is configured to implement the timer start method described in the second aspect.

[0020] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes the timer start method as described in any one of the first aspect or the timer start method as described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure;

[0023] FIG2 is a schematic diagram of a framework of a wireless connection maintenance system provided by an embodiment of the present disclosure;

[0024] FIG3 is a schematic diagram illustrating an example of a transparent transmission mode provided by an embodiment of the present disclosure;

[0025] FIG4 is a schematic diagram illustrating an example of a retransmission mode provided by an embodiment of the present disclosure;

[0026] FIG5 is an interactive diagram of a timer starting method provided by yet another embodiment of the present disclosure;

[0027] FIG6A is a flow chart of a timer starting method provided in yet another embodiment of the present disclosure;

[0028] FIG6B is a flow chart of a timer starting method provided by yet another embodiment of the present disclosure;

[0029] FIG6C is a flow chart of a timer starting method provided in yet another embodiment of the present disclosure;

[0030] FIG6D is a schematic flow chart of a timer starting method provided in yet another embodiment of the present disclosure;

[0031] FIG6E is a schematic flow chart of a timer starting method provided in yet another embodiment of the present disclosure;

[0032] FIG7A is a schematic flow chart of a timer starting method provided in yet another embodiment of the present disclosure;

[0033] FIG8A is a schematic flow chart of a timer starting method provided in yet another embodiment of the present disclosure;

[0034] FIG9A is a schematic structural diagram of a terminal provided by yet another embodiment of the present disclosure;

[0035] FIG9B is a schematic structural diagram of a network device provided by an embodiment of the present disclosure;

[0036] FIG10A is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0037] FIG10B is a schematic structural diagram of a chip provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] The present disclosure proposes a timer activation method, apparatus, device, and storage medium to solve the problem of inaccurate HARQ RTT timer activation resulting in inaccurate transmission of transmission blocks (TBs).

[0039] According to a first aspect of an embodiment of the present disclosure, a timer starting method is proposed, the method comprising:

[0040] A physical downlink control channel (PDCCH) indicates link transmission, and based on at least one of a hybrid automatic repeat request mode (HARQ mode) configuration and a hybrid automatic repeat request feedback (HARQ feedback) configuration of the PDCCH, determines whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission.

[0041] In the above embodiment, whether to start the HARQ RTT Timer can be determined based on at least one of the HARQ mode configuration and the HARQ feedback configuration, and a HARQ RTT timer start-up mechanism can be provided, which can improve the accuracy of HARQ RTT Timer start-up, improve the accuracy of HARQ initiation, and improve the accuracy of TB retransmission.

[0042] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0043] The link transmission is a downlink (DL) multi-transport block TB transmission, and the start time of the HARQ RTT timer is determined to be the subframe in which the terminal receives the last repetition of the last TB, wherein the HARQ RTT timer is a timer corresponding to the downlink.

[0044] In the above embodiment, during downlink multi-TB transmission, the subframe in which the terminal receives the last repetition of the last TB can be used as the start time of the HARQ RTT timer, which can improve the accuracy of determining the start time of the HARQ RTT timer during downlink multi-TB transmission and improve the accuracy of downlink multi-TB retransmission.

[0045] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0046] The link transmission is uplink (UL) multi-TB transmission, and the start time of the UL HARQ RTT timer is determined to be the subframe in which the last repetition of the terminal sending the last TB is located, wherein the UL HARQ RTT timer is a timer corresponding to the uplink.

[0047] In the above embodiment, during uplink multi-TB transmission, the subframe in which the last repetition of the last TB sent by the terminal is located can be used as the start time of the UL HARQ RTT timer, which can improve the accuracy of determining the start time of the UL HARQ RTT timer during uplink multi-TB transmission and improve the accuracy of uplink multi-TB retransmission.

[0048] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0049] The link transmission is a downlink single TB transmission, and the start time of the HARQ RTT timer is determined to be the subframe in which the terminal receives the last repetition of the TB, wherein the HARQ RTT timer is a timer corresponding to the downlink.

[0050] In the above embodiment, when a single TB is transmitted in the downlink, the subframe in which the terminal receives the last repetition of the TB can be used as the start time of the HARQ RTT timer, which can improve the accuracy of determining the start time of the HARQ RTT timer during the downlink single TB transmission and improve the accuracy of the downlink single TB retransmission.

[0051] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0052] The link transmission is uplink single TB transmission, and the start time of the UL HARQ RTT timer is determined to be the subframe in which the last repetition of the terminal sending the TB is located, wherein the UL HARQ RTT timer is a timer corresponding to the uplink.

[0053] In the above embodiment, when a single TB is transmitted in the uplink, the subframe in which the last repetition of the TB is sent by the terminal can be used as the start time of the UL HARQ RTT timer, which can improve the accuracy of determining the start time of the UL HARQ RTT timer during the uplink single TB transmission and improve the accuracy of the uplink single TB retransmission.

[0054] In conjunction with some embodiments of the first aspect, in some embodiments, the physical downlink control channel PDCCH indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH includes:

[0055] The PDCCH indicates single DL TB transmission, and the PDCCH indicates to enable HARQ feedback of a hybrid automatic repeat request HARQ process of the DL transmission. The HARQ process enables the HARQ feedback through RRC configuration and starts a HARQ RTT timer corresponding to the HARQ process.

[0056] In the above embodiment, when the PDCCH indicates single DL TB transmission and the PDCCH indicates to turn on HARQ feedback of the HARQ process, the HARQ process turns on HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process can be started, which can improve the accuracy of starting the HARQ RTT Timer, improve the accuracy of HARQ initiation, and improve the accuracy of TB retransmission.

[0057] In conjunction with some embodiments of the first aspect, in some embodiments, the physical downlink control channel PDCCH indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH includes:

[0058] The PDCCH indicates single DL TB transmission, and the PDCCH indicates to enable HARQ feedback of a hybrid automatic repeat request process HARQ process of the DL transmission, the HARQ process does not enable or disable the HARQ feedback through the RRC configuration, and a HARQ RTT timer corresponding to the HARQ process is started.

[0059] In the above embodiment, when the PDCCH indicates single DL TB transmission and the PDCCH indicates to turn on HARQ feedback of the HARQ process, the HARQ process does not turn on or off HARQ feedback through the RRC configuration, and the HARQ RTT timer corresponding to the HARQ process is started. Therefore, the HARQ RTT Timer can be started according to the RRC configuration, which can improve the accuracy of the HARQ RTT Timer startup, improve the accuracy of HARQ initiation, and improve the accuracy of TB retransmission.

[0060] In conjunction with some embodiments of the first aspect, in some embodiments, the physical downlink control channel PDCCH indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH includes:

[0061] The PDCCH indicates multiple DL TB transmissions, and the PDCCH indicates to enable HARQ feedback. The HARQ process corresponding to any TB in the multiple DL TBs enables the HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process corresponding to any TB is started.

[0062] In the above embodiment, when the PDCCH indicates multiple DL TB transmissions and the PDCCH indicates the activation of HARQ feedback, HARQ feedback is activated in the HARQ processes corresponding to all DL TBs through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process corresponding to any TB is activated. Therefore, the HARQ RTT timer corresponding to the HARQ process corresponding to any TB can be activated according to the RRC configuration, which can improve the accuracy of HARQ RTT timer activation, improve the accuracy of HARQ initiation, and improve the accuracy of TB retransmission.

[0063] In conjunction with some embodiments of the first aspect, in some embodiments, the physical downlink control channel PDCCH indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH includes:

[0064] The PDCCH indicates multiple DL TB transmissions, and the PDCCH indicates opening of HARQ feedback; the HARQ process corresponding to any TB in the multiple DL TBs does not open or close the HARQ feedback through the RRC configuration; and a HARQ RTT timer corresponding to the HARQ process corresponding to any TB is started.

[0065] In the above embodiment, when the PDCCH indicates multiple DL TB transmissions and the PDCCH indicates the activation of HARQ feedback, HARQ feedback is not enabled or disabled in the HARQ processes corresponding to all DL TBs through the RRC configuration, and the HARQ RTT timer corresponding to the HARQ process corresponding to any one of the TBs is activated. Therefore, the HARQ RTT timer corresponding to the HARQ process corresponding to any one of the TBs can be activated according to the RRC configuration, which can improve the accuracy of HARQ RTT timer activation, improve the accuracy of HARQ initiation, and improve the accuracy of TB retransmission.

[0066] In conjunction with some embodiments of the first aspect, in some embodiments, the physical downlink control channel PDCCH indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH includes:

[0067] The PDCCH indicates single DL TB transmission, and the PDCCH indicates to enable HARQ feedback of the HARQ process of the DL transmission. The HARQ process disables the HARQ feedback through RRC configuration, and does not start a HARQ RTT timer corresponding to the HARQ process.

[0068] In the above embodiment, when the PDCCH indicates single DL TB transmission and the PDCCH indicates enabling HARQ feedback for the HARQ process for DL ​​transmission, the HARQ process disables HARQ feedback via RRC configuration, and the HARQ RTT timer corresponding to the HARQ process is not started. Therefore, the HARQ RTT timer corresponding to the HARQ process can be disabled according to the RRC configuration, thereby improving the accuracy of HARQ RTT timer activation.

[0069] In conjunction with some embodiments of the first aspect, in some embodiments, the physical downlink control channel PDCCH indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH includes:

[0070] The PDCCH indicates multiple DL TB transmissions, and the PDCCH indicates to enable HARQ feedback. The HARQ process corresponding to any TB in the multiple DL TBs disables the HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

[0071] In the above embodiment, when the PDCCH indicates multiple DL TB transmissions and the PDCCH indicates the activation of HARQ feedback, HARQ feedback is disabled in the HARQ processes corresponding to all DL TBs through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process corresponding to any TB is not activated. Therefore, the HARQ RTT timer corresponding to the HARQ process corresponding to any TB can be deactivated according to the RRC configuration, thereby improving the accuracy of HARQ RTT timer activation.

[0072] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0073] The PDCCH indicates single DL TB transmission, and the PDCCH indicates turning off HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process turns off HARQ feedback through RRC configuration, and does not start the HARQ RTT timer corresponding to the HARQ process.

[0074] In the above embodiment, the PDCCH indicates to disable HARQ feedback of the HARQ process for DL ​​transmission, and the HARQ process disables HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process is not started. Therefore, resources for starting the HARQ RTT timer can be saved and the accuracy of starting the HARQ RTT timer can be improved.

[0075] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0076] The PDCCH indicates single DL TB transmission, and the PDCCH indicates that the HARQ feedback of the HARQ process for DL ​​transmission is turned off. The HARQ process turns on HARQ feedback through RRC configuration, and does not start the HARQ RTT timer corresponding to the HARQ process.

[0077] In the above embodiment, the PDCCH indicates to disable HARQ feedback of the HARQ process for DL ​​transmission, and the HARQ process enables HARQ feedback through RRC configuration, but does not start the HARQ RTT timer corresponding to the HARQ process. This saves resources for starting the HARQ RTT timer and improves the accuracy of starting the HARQ RTT timer.

[0078] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0079] The PDCCH indicates single DL TB transmission, and the PDCCH indicates that the HARQ feedback of the HARQ process for DL ​​transmission is disabled. The HARQ process is not configured to enable or disable HARQ feedback through RRC, and the HARQ RTT timer corresponding to the HARQ process is not started.

[0080] In the above embodiment, the PDCCH indicates that the HARQ feedback of the HARQ process for DL ​​transmission is turned off, and the HARQ process is not configured to turn on or off HARQ feedback through RRC, and the HARQ RTT timer corresponding to the HARQ process is not started. Therefore, the resources for starting the HARQ RTT timer can be saved and the accuracy of starting the HARQ RTT timer can be improved.

[0081] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0082] PDCCH indicates multiple DL TB transmissions, and PDCCH indicates that HARQ feedback is turned off. The HARQ process corresponding to any TB in the multiple DL TBs turns off HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

[0083] In the above embodiment, the PDCCH indicates that HARQ feedback is turned off, and the HARQ process corresponding to any TB in multiple DL TBs turns off HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started. Therefore, the resources for starting the HARQ RTT timer can be saved and the accuracy of starting the HARQ RTT timer can be improved.

[0084] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0085] PDCCH indicates multiple DL TB transmissions, and PDCCH indicates that HARQ feedback is turned off. The HARQ process corresponding to any TB in the multiple DL TBs turns on HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

[0086] In the above embodiment, the PDCCH indicates that HARQ feedback is turned off, and the HARQ process corresponding to any TB in multiple DL TBs turns on HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started. Therefore, the resources for starting the HARQ RTT timer can be saved and the accuracy of starting the HARQ RTT timer can be improved.

[0087] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0088] PDCCH indicates multiple DL TB transmissions, and PDCCH indicates that HARQ feedback is turned off. The HARQ process corresponding to any TB in the multiple DL TBs is not configured to turn on or off HARQ feedback through RRC, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

[0089] In the above embodiment, the PDCCH indicates that HARQ feedback is turned off, and the HARQ process corresponding to any TB in the multiple DL TBs does not turn on or off HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started. Therefore, the resources for starting the HARQ RTT timer can be saved and the accuracy of starting the HARQ RTT timer can be improved.

[0090] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0091] The PDCCH indicates single UL TB transmission, configures the HARQ mode of the HARQ process of UL transmission to Mode A, and starts the UL HARQ RTT timer corresponding to the HARQ process.

[0092] In the above embodiment, the PDCCH indicates a single UL TB transmission, and the PDCCH configures the HARQ mode of the UL transmission HARQ process to Mode A, and starts the UL HARQ RTT timer corresponding to the HARQ process. Therefore, the HARQ RTT timer corresponding to the HARQ process can be started according to the Mode configuration, which can improve the accuracy of the HARQ RTT timer startup.

[0093] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0094] PDCCH indicates multiple UL TB transmissions, PDCCH configures HARQ Mode to Mode A, and starts the UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs.

[0095] In the above embodiment, the PDCCH indicates multiple UL TB transmissions, the PDCCH configures the HARQ Mode to Mode A, and the UL HARQ RTT timer corresponding to the HARQ process of any of the multiple TBs is started. Therefore, the HARQ RTT timer corresponding to the HARQ process of any of the multiple TBs can be started based on the Mode configuration, which can improve the accuracy of the HARQ RTT timer startup.

[0096] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0097] PDCCH indicates single UL TB transmission, and the HARQ Mode of the HARQ process configured by PDCCH for UL transmission is Mode B. The UL HARQ RTT timer corresponding to the HARQ process is not started.

[0098] In the above embodiment, the PDCCH indicates a single UL TB transmission, and the HARQ mode of the HARQ process configured by the PDCCH is Mode B. The UL HARQ RTT timer corresponding to the HARQ process is not started. Therefore, the HARQ RTT timer corresponding to the HARQ process can be deactivated based on the Mode configuration, thereby improving the accuracy of HARQ RTT timer activation.

[0099] In conjunction with some embodiments of the first aspect, in some embodiments, a physical downlink control channel (PDCCH) indicates link transmission, and determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ) feedback configuration of the PDCCH includes:

[0100] PDCCH indicates multiple UL TB transmissions, and PDCCH configures HARQ Mode to Mode B. The UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs is not started.

[0101] In the above embodiment, the PDCCH indicates multiple UL TB transmissions, and the PDCCH configures the HARQ Mode to Mode B, which does not start the UL HARQ RTT timer corresponding to the HARQ process for any of the multiple TBs. Therefore, the HARQ RTT timer corresponding to the HARQ process for any of the multiple TBs can be deactivated based on the Mode configuration, thereby improving the accuracy of HARQ RTT timer activation.

[0102] According to a second aspect of an embodiment of the present disclosure, a timer starting method is proposed, the method comprising:

[0103] The physical downlink control channel PDCCH indicates link transmission, and sends at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH to the terminal, wherein at least one of the HARQ mode configuration and the HARQ feedback configuration is used to determine whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission.

[0104] In the above embodiment, a HARQ RTT Timer start mechanism can be provided for the terminal. Providing the HARQ RTT Timer start mechanism can improve the accuracy of HARQ RTT Timer start, improve the accuracy of HARQ initiation, and improve the accuracy of TB retransmission.

[0105] According to a third aspect of an embodiment of the present disclosure, a terminal is provided, the device including:

[0106] The processing module is configured to determine whether to start a hybrid automatic repeat request round trip timer corresponding to the link transmission based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH when the physical downlink control channel PDCCH indicates link transmission.

[0107] In the above embodiment, the terminal can determine whether to start the HARQ RTT Timer based on at least one of the HARQ mode configuration and the HARQ feedback configuration, and can provide a HARQ RTT timer start-up mechanism, which can improve the accuracy of HARQ RTT Timer start-up, improve the accuracy of HARQ initiation, and improve the accuracy of TB retransmission.

[0108] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, the device including:

[0109] The transceiver module is configured to use a physical downlink control channel (PDCCH) to indicate link transmission and transmit at least one of a hybrid automatic repeat request mode (HARQ) mode configuration and a hybrid automatic repeat request feedback (HARQ feedback) configuration of the PDCCH to the terminal, wherein at least one of the HARQ mode configuration and the HARQ feedback configuration is used to determine whether to start a hybrid automatic repeat request round trip timer corresponding to the link transmission.

[0110] In the above embodiment, the network device can provide the terminal with a HARQ RTT timer startup mechanism. Providing the HARQ RTT timer startup mechanism can improve the accuracy of HARQ RTT timer startup, improve the accuracy of HARQ initiation, and improve the accuracy of TB retransmission.

[0111] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0112] one or more processors;

[0113] The terminal is used to execute the timer starting method described in any one of the first aspects.

[0114] According to a sixth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0115] one or more processors;

[0116] Wherein, the terminal is used to execute the timer starting method described in the second aspect.

[0117] According to the seventh aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a terminal and a network device, wherein the terminal is configured to implement the timer start method described in any one of the first aspects, and the network device is configured to implement the timer start method described in the second aspect.

[0118] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes the timer start method as described in any one of the first aspect or the timer start method as described in the second aspect.

[0119] The present disclosure provides a timer start method. In some embodiments, the terms "timer start method" and "information processing method" and "communication method" are interchangeable; the terms "timer start device" and "information processing device" and "communication device" are interchangeable; and the terms "information processing system" and "communication system" are interchangeable.

[0120] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0121] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0122] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0123] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0124] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0125] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0126] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0127] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0128] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0129] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0130] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0131] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0132] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0133] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0134] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0135] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0136] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0137] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0138] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0139] FIG1 is a schematic diagram illustrating the architecture of a communication system according to an embodiment of the present disclosure. As shown in FIG1 , a communication system 100 includes a terminal 101 and a network device 102 .

[0140] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0141] In some embodiments, the network device 102 may include, for example, at least one of an access network device and a core network device.

[0142] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a sixth generation mobile networks (6G) communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0143] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0144] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0145] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0146] In some embodiments, the core network device 1 may be a single device including a first network element, a second network element, etc., or may be a plurality of devices or a device group including all or part of the first network element, the second network element, etc. The network element may be virtual or physical. The core network may include, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0147] In some embodiments, the first network element is, for example, a Policy Control Function (PCF).

[0148] In some embodiments, the first network element is used to "support a unified policy framework to manage network behavior, provide policy rules to network entities for implementation, and access subscription information of a unified data repository (UDR)", and the name is not limited thereto.

[0149] In some embodiments, the second network element is, for example, a unified data management function (UDM).

[0150] In some embodiments, the second network element is used to "be responsible for the management of user identification, subscription data, authentication data, and service network element registration management of the user", and the name is not limited to this.

[0151] In some embodiments, the third network element is, for example, an authentication service function (AUSF).

[0152] In some embodiments, the third network element is used to "receive a request from the access and mobility management function (AMF) to authenticate the terminal, request a key from the UDM, and then forward the key issued by the UDM to the AMF for authentication processing." The name is not limited to this.

[0153] In some embodiments, the third network element may be independent of the core network device.

[0154] In some embodiments, the third network element may be part of a core network device.

[0155] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0156] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0157] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0158] Optionally, in one embodiment of the present disclosure, in the communication system, NTN is an important technology in 5G, and NTN can provide wireless resources through satellites (or drones) instead of ground base stations. Figure 2 is a schematic diagram of the framework of a wireless connection maintenance system provided by an embodiment of the present disclosure. As shown in Figure 2, the wireless connection maintenance system includes terminal equipment (User Equiments, UE), beam projection Beam foot print, service link Service link, satellite Satellite, Unmanned Aircraft System (UAS) platform platform, Feeder link Feeder link Gateway Gateway Data network and satellite field of view of the satellite Field of view of the satellite. According to the different ways in which the satellite processes signals, it can be divided into transparent transmission mode and regeneration mode.

[0159] In one embodiment of the present disclosure, Figure 3 is a schematic diagram illustrating an example of a transparent transmission mode provided by an embodiment of the present disclosure. As shown in Figure 3, the NTN ground station transmits the gNB signal to the satellite. The satellite converts the signal to the satellite frequency band and then transmits it to the UE via the satellite frequency band. Besides frequency conversion and signal amplification, the satellite does not demodulate the gNB signal. The satellite can be similar to a repeater. The 5G base station is called a gNB. It can provide the UE with a node for the New Radio (NR) user plane and control plane protocol terminals and is connected to the 5G core network (5GC) via the NG interface.

[0160] In one embodiment of the present disclosure, Figure 4 is a schematic diagram illustrating an example of a retransmission mode provided by the present disclosure. As shown in Figure 4, after the NTN ground station sends the gNB signal to the satellite, the satellite first demodulates and decodes the signal, then re-encodes and modulates it (a process known as regeneration), and transmits the regenerated signal via the satellite frequency band.

[0161] In one embodiment of the present disclosure, Table 1 shows the satellite altitude, orbit, and satellite coverage of a typical NTN network provided by the embodiment of the present disclosure:

[0162] Table 1

[0163] According to some embodiments, in a single transport block (Single TB) scenario, for a HARQ process (HARQ process) configured with HARQ feedback disable (feedback disable) through Radio Resource Control (RRC), if HARQ feedback is enabled (enable) through Downlink Control Information (DCI), the NBIoT UE does not wait for the round trip time + 3ms before monitoring the narrowband PDCCH (NPDCCH) for the same HARQ process (or monitoring any NPDCCH for a single HARQ process configuration), which has a certain impact on the HARQ RTT timer. The main impact is that even if the DCI indicates HARQ feedback enable, its purpose is not to enable HARQ retransmission based on scheduling, but only to facilitate the network device to adjust the scheduling policy based on HARQ feedback. Therefore, in this case, the HARQ RTT timer cannot be started to monitor the retransmission scheduling. In addition, for multi-TB scenarios, the working mechanism of the HARQ RTT timer also needs to be considered for UL HARQ.

[0164] A timer starting method, apparatus, device, and storage medium provided by embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0165] FIG5 is an interactive diagram of a timer starting method provided by an embodiment of the present disclosure. As shown in FIG5 , the method may include the following steps:

[0166] Step S5101: The physical downlink control channel PDCCH indicates link transmission, and the network device 102 sends at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH to the terminal 101;

[0167] In step S5102, the terminal 101 determines whether to start a HARQ round trip timer corresponding to the link transmission based on at least one of the HARQ mode configuration and the HARQ feedback configuration of the PDCCH.

[0168] Optionally, in one embodiment of the present disclosure, the PDCCH-indicated link transmission may be, for example, a transmission type of the PDCCH-indicated link transmission, which may be, for example, an uplink transmission type, or a downlink transmission type.

[0169] Optionally, in one embodiment of the present disclosure, data transmission on a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH) may be based on TB transmission, for example.

[0170] In some embodiments, terms such as "type" and "parameter" can be used interchangeably.

[0171] For example, in one embodiment of the present disclosure, the terminal 101 may determine whether to start a hybrid automatic repeat request round trip timer corresponding to downlink transmission based on a hybrid automatic repeat request feedback HARQ feedback configuration.

[0172] For example, in one embodiment of the present disclosure, the terminal 101 may determine whether to start a hybrid automatic repeat request round trip time timer corresponding to uplink transmission based on a hybrid automatic repeat request mode HARQ mode configuration.

[0173] For example, in one embodiment of the present disclosure, the terminal 101 may determine whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission based on the hybrid automatic repeat request mode HARQ mode configuration or the hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH.

[0174] In step S5103, the link transmission is downlink multi-transport block TB transmission, and the terminal 101 determines the start time of the HARQ RTT timer as the subframe in which the terminal receives the last repetition of the last TB, where the HARQ RTT timer is a timer corresponding to the downlink.

[0175] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0176] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0177] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "some", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "some A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, some A, any A, or first A, etc., but not limited to this.

[0178] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0179] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0180] In some embodiments, terms such as "frame", "radio frame", "subframe", "slot", "sub-slot", "mini-slot", "symbol", "symbol", and "transmission time interval (TTI)" can be used interchangeably.

[0181] Step S5104: The link transmission is uplink multi-TB transmission, and the terminal 101 determines the start time of the UL HARQ RTT timer as the subframe in which the last repetition of the last TB sent by the terminal is located, where the UL HARQ RTT timer is a timer corresponding to the uplink.

[0182] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0183] In step S5105, the link transmission is a downlink single TB transmission, and the terminal 101 determines that the start time of the HARQ RTT timer is the subframe in which the last repetition of the TB received by the terminal is located, where the HARQ RTT timer is a timer corresponding to the downlink.

[0184] Step S5106: The link transmission is uplink single TB transmission, and the terminal 101 determines the start time of the UL HARQ RTT timer as the subframe in which the last repetition of the terminal sending the TB is located, where the UL HARQ RTT timer is a timer corresponding to the uplink.

[0185] In step S5107, the PDCCH indicates single DL TB transmission and the HARQ feedback of the hybrid automatic repeat request process HARQ process for DL ​​transmission is enabled. The HARQ process enables HARQ feedback through RRC configuration, and the terminal 101 starts the HARQ RTT timer corresponding to the HARQ process.

[0186] In step S5108, the PDCCH indicates single DL TB transmission, and the PDCCH indicates to enable HARQ feedback of the hybrid automatic repeat request process HARQ process for DL ​​transmission. The HARQ process does not enable or disable HARQ feedback through RRC configuration, and the terminal 101 starts the HARQ RTT timer corresponding to the HARQ process.

[0187] In step S5109, PDCCH indicates multiple DL TB transmission and HARQ feedback is enabled. The HARQ process corresponding to any TB in the multiple DL TBs enables HARQ feedback through RRC configuration, and the terminal 101 starts the HARQ RTT timer corresponding to the HARQ process corresponding to any TB.

[0188] In step S5110, PDCCH indicates multiple DL TB transmissions and indicates to enable HARQ feedback. If the HARQ process corresponding to any TB in the multiple DL TBs does not enable or disable HARQ feedback through RRC configuration, the terminal 101 starts the HARQ RTT timer corresponding to the HARQ process corresponding to any TB.

[0189] In step S5111, the PDCCH indicates single DL TB transmission, and the PDCCH indicates to enable HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process disables HARQ feedback through RRC configuration, and the terminal 101 does not start the HARQ RTT timer corresponding to the HARQ process.

[0190] In step S5112, PDCCH indicates multiple DL TB transmission and PDCCH indicates to enable HARQ feedback. The HARQ process corresponding to any TB in the multiple DL TBs disables HARQ feedback through RRC configuration, and the terminal 101 does not start the HARQ RTT timer corresponding to the HARQ process of any TB.

[0191] In step S5113, the PDCCH indicates single DL TB transmission, and the PDCCH indicates disabling HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process disables HARQ feedback through RRC configuration, and the terminal 101 does not start the HARQ RTT timer corresponding to the HARQ process.

[0192] In step S5114, the PDCCH indicates single DL TB transmission, and the PDCCH indicates turning off HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process turns on HARQ feedback through RRC configuration, and the terminal 101 does not start the HARQ RTT timer corresponding to the HARQ process.

[0193] In step S5115, the PDCCH indicates single DL TB transmission, and the PDCCH indicates turning off HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process does not turn on or off HARQ feedback through RRC configuration, and the terminal 101 does not start the HARQ RTT timer corresponding to the HARQ process.

[0194] In step S5116, PDCCH indicates multiple DL TB transmission and disables HARQ feedback. The HARQ process corresponding to any TB in the multiple DL TBs disables HARQ feedback through RRC configuration, and the terminal 101 does not start the HARQ RTT timer corresponding to the HARQ process of any TB.

[0195] In step S5117, PDCCH indicates multiple DL TB transmission and disables HARQ feedback. The HARQ process corresponding to any TB in the multiple DL TBs enables HARQ feedback through RRC configuration, and the terminal 101 does not start the HARQ RTT timer corresponding to the HARQ process of any TB.

[0196] In step S5118, PDCCH indicates multiple DL TB transmission and disables HARQ feedback. The HARQ process corresponding to any TB in the multiple DL TBs does not enable or disable HARQ feedback through RRC configuration. The terminal 101 does not start the HARQ RTT timer corresponding to the HARQ process of any TB.

[0197] In step S5119, the PDCCH indicates single UL TB transmission, and the HARQ mode Mode of the HARQ process configured by the PDCCH for UL transmission is Mode A. The terminal 101 starts the UL HARQ RTT timer corresponding to the HARQ process.

[0198] Optionally, in one embodiment of the present disclosure, the HARQ Mode may include, for example, Mode A and Mode B. Mode A may, for example, allow an HARQ process to be scheduled after one HARQ RTT has passed since the last scheduling. Mode B may, for example, allow an HARQ process to be scheduled before one HARQ RTT has passed since the last scheduling.

[0199] In step S5120 , the PDCCH indicates multiple UL TB transmissions, the PDCCH configures the HARQ Mode to Mode A, and the terminal 101 starts the UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs.

[0200] In step S5121, the PDCCH indicates single UL TB transmission, the HARQ Mode of the HARQ process configured by the PDCCH for UL transmission is Mode B, and the terminal 101 does not start the UL HARQ RTT timer corresponding to the HARQ process.

[0201] In step S5122, the PDCCH indicates multiple UL TB transmissions, and the PDCCH configures the HARQ Mode to Mode B. The terminal 101 does not start the UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs.

[0202] In step S5123, the network device 102 sends an RRC configuration to the terminal 101. For example, the network device 102 sends an RRC message to the terminal 101, where the RRC message is used to configure the terminal.

[0203] The communication method involved in the embodiments of the present disclosure may include at least one of steps S5101 to S5123. For example, step S5101 may be implemented as an independent embodiment, step S5103 may be implemented as an independent embodiment, steps S5101 to S5103 may be implemented as an independent embodiment, and steps S5101 to S5103 and step S5105 may be implemented as independent embodiments, but are not limited thereto.

[0204] In some embodiments, steps S5102 and 5103 may be executed in an exchanged order or simultaneously, and steps S5102 and 5104 may be executed in an exchanged order or simultaneously.

[0205] In some embodiments, steps S5103 to S5122 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0206] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 5 .

[0207] FIG6A is a flow chart of a method for starting a timer according to an embodiment of the present disclosure. As shown in FIG6A , the embodiment of the present disclosure relates to a method for starting a timer, and the method includes:

[0208] Step S6101: A physical downlink control channel (PDCCH) indicates link transmission, and based on at least one of a hybrid automatic repeat request (HARQ) mode configuration and a hybrid automatic repeat request (HARQ) feedback configuration of the PDCCH, it is determined whether to start a hybrid automatic repeat request round trip timer corresponding to the link transmission.

[0209] Optionally, in one embodiment of the present disclosure, the PDCCH indicates link transmission, and based on the HARQ mode configuration of the PDCCH, it is determined whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission.

[0210] Optionally, in one embodiment of the present disclosure, the PDCCH indicates link transmission, and based on the HARQ feedback configuration of the PDCCH, it is determined whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission.

[0211] Furthermore, in one embodiment of the present disclosure, the HARQ round trip timer is a timer used for retransmission scheduling. When the HARQ round trip timer reaches a set duration, retransmission may be initiated.

[0212] Optionally, in one embodiment of the present disclosure, a HARQ round-trip timer corresponds to a link. For example, the UL corresponding to the UL may be the UL HARQ RTT timer, and the DL corresponding to the DL may be the HARQ RTT timer. The HARQ round-trip timer does not specifically refer to a fixed timer. For example, when the timing duration corresponding to the HARQ round-trip timer changes, the HARQ round-trip timer may also change accordingly. For example, the HARQ round-trip timers corresponding to different links may also be different.

[0213] Optionally, in one embodiment of the present disclosure, the HARQ mode may include mode A and mode B, for example.

[0214] For example, in one embodiment of the present disclosure, the PDCCH indicating link transmission may be, for example, an uplink transmission indicated by the PDCCH, or a downlink transmission indicated by the PDCCH.

[0215] Optionally, in one embodiment of the present disclosure, at least one of the HARQ mode configuration and the HARQ feedback configuration may be sent to the terminal simultaneously with the PDCCH indicating link transmission.

[0216] Optionally, the terminal 101 may receive at least one of the HARQ mode configuration and the HARQ feedback configuration sent by the network device 102, and may also process to obtain at least one of the HARQ mode configuration and the HARQ feedback configuration.

[0217] Optionally, obtaining the PDCCH indication link transmission and obtaining at least one of the hybrid automatic repeat request mode HARQ mode configuration and the hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH can be obtained simultaneously or separately, which is not limited in the embodiments of the present disclosure.

[0218] Step S6102: The link transmission is downlink multi-transport block (TB) transmission, and the start time of the HARQ RTT timer is determined to be the subframe in which the terminal receives the last repetition of the last TB, where the HARQ RTT timer is a timer corresponding to the downlink.

[0219] The optional implementation of step S6102 can refer to the optional implementation of step S5103 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0220] Optionally, in some embodiments of the present disclosure, the terminal may determine that the subframe in which the terminal receives the last repetition of the last TB is located as the start time of the HARQ RTT timer.

[0221] The HARQ RTT timer is a timer corresponding to the downlink. The timing duration of the HARQ RTT timer may be, for example, obtained by the terminal 101 through a protocol. The timing duration of the HARQ RTT timer may be, for example, obtained by the terminal 101 from an upper layer (upper layer(s)). The timing duration of the HARQ RTT timer may be, for example, obtained by the terminal 101 through processing.

[0222] Step S6103: If the link transmission is uplink multi-TB transmission, the start time of the UL HARQ RTT timer is determined to be the subframe in which the last repetition of the last TB sent by the terminal is located, where the UL HARQ RTT timer is a timer corresponding to the uplink.

[0223] The optional implementation of step S6103 can refer to the optional implementation of step S5104 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0224] Optionally, in some embodiments of the present disclosure, the terminal may determine that the subframe in which the last repetition in which the terminal sends the last TB is located is the start time of the UL HARQ RTT timer.

[0225] Step S6104: The link transmission is downlink single TB transmission, and the start time of the HARQ RTT timer is determined to be the subframe where the last repetition of the TB received by the terminal is located, where the HARQ RTT timer is a timer corresponding to the downlink.

[0226] The optional implementation of step S6104 can refer to the optional implementation of step S5105 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0227] Optionally, in some embodiments of the present disclosure, the terminal may determine that the subframe in which the terminal receives the last repetition of the TB is located is the start time of the HARQ RTT timer.

[0228] Step S6105: The link transmission is uplink single TB transmission, and the start time of the UL HARQ RTT timer is determined to be the subframe in which the last repetition of the terminal sending the TB is located, where the UL HARQ RTT timer is a timer corresponding to the uplink.

[0229] The optional implementation of step S6105 can refer to the optional implementation of step S5106 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0230] Optionally, in some embodiments of the present disclosure, the terminal may determine that the subframe in which the last repetition of sending the TB is located is the start time of the UL HARQ RTT timer.

[0231] In step S6106, the PDCCH indicates single DL TB transmission and the HARQ feedback of the hybrid automatic repeat request process HARQ process for DL ​​transmission is enabled. The HARQ process enables HARQ feedback through RRC configuration and starts the HARQ RTT timer corresponding to the HARQ process.

[0232] The optional implementation of step S6106 can refer to the optional implementation of step S5107 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0233] In step S6107, the PDCCH indicates single DL TB transmission and the PDCCH indicates to enable HARQ feedback of the hybrid automatic repeat request process HARQ process for DL ​​transmission. The HARQ process does not enable or disable HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process is started.

[0234] The optional implementation of step S6107 can refer to the optional implementation of step S5108 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0235] Optionally, in one embodiment of the present disclosure, the PDCCH indicates single DL TB transmission, and the PDCCH indicates turning on HARQ feedback of the hybrid automatic repeat request process HARQ process for DL ​​transmission. The HARQ process does not turn on HARQ feedback through RRC configuration or turn off HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process is started.

[0236] In step S6108, PDCCH indicates multiple DL TB transmission and PDCCH indicates to enable HARQ feedback. HARQ feedback is enabled for any HARQ process corresponding to any TB in the multiple DL TBs through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process corresponding to any TB is started.

[0237] The optional implementation of step S6108 can refer to the optional implementation of step S5109 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0238] Optionally, in an embodiment of the present disclosure, one TB may correspond to one HARQ process, for example, and one HARQ process may correspond to one HARQ RTT timer, for example.

[0239] In step S6109, PDCCH indicates multiple DL TB transmission and PDCCH indicates to enable HARQ feedback. If the HARQ process corresponding to any TB in the multiple DL TBs does not enable or disable HARQ feedback through RRC configuration, the HARQ RTT timer corresponding to the HARQ process corresponding to any TB is started.

[0240] The optional implementation of step S6109 can refer to the optional implementation of step S5110 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0241] Optionally, in one embodiment of the present disclosure, PDCCH indicates the transmission of multiple DL TBs, and PDCCH indicates the opening of HARQ feedback. The HARQ process corresponding to any TB in the multiple DL TBs does not open HARQ feedback through RRC configuration, nor does it close HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process corresponding to any TB is started.

[0242] In step S6110, the PDCCH indicates single DL TB transmission, and the PDCCH indicates to enable HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process disables HARQ feedback through RRC configuration, and does not start the HARQ RTT timer corresponding to the HARQ process.

[0243] The optional implementation of step S6110 can refer to the optional implementation of step S5111 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0244] In step S6111, PDCCH indicates multiple DL TB transmission and PDCCH indicates to enable HARQ feedback. The HARQ process corresponding to any TB in the multiple DL TBs disables HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

[0245] The optional implementation of step S6111 can refer to the optional implementation of step S5112 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0246] In step S6112, the PDCCH indicates single DL TB transmission, and the PDCCH indicates to disable HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process disables HARQ feedback through RRC configuration, and does not start the HARQ RTT timer corresponding to the HARQ process.

[0247] The optional implementation of step S6112 can refer to the optional implementation of step S5113 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0248] In step S6113, the PDCCH indicates single DL TB transmission, and the PDCCH indicates to disable HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process enables HARQ feedback through RRC configuration, and does not start the HARQ RTT timer corresponding to the HARQ process.

[0249] The optional implementation of step S6113 can refer to the optional implementation of step S5114 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0250] In step S6114, the PDCCH indicates single DL TB transmission, and the PDCCH indicates disabling HARQ feedback of the HARQ process for DL ​​transmission. The HARQ process does not enable or disable HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process is not started.

[0251] The optional implementation of step S6114 can refer to the optional implementation of step S5115 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0252] In step S6115, PDCCH indicates multiple DL TB transmission and disables HARQ feedback. HARQ feedback is disabled for any HARQ process in the multiple DL TBs through RRC configuration, and the HARQ RTT timer corresponding to any HARQ process is not started.

[0253] The optional implementation of step S6115 can refer to the optional implementation of step S5116 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0254] In step S6116, PDCCH indicates multiple DL TB transmission and disables HARQ feedback. HARQ feedback is enabled for any HARQ process in the multiple DL TBs through RRC configuration, and the HARQ RTT timer corresponding to any HARQ process is not started.

[0255] The optional implementation of step S6116 can refer to the optional implementation of step S5117 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0256] In step S6117, PDCCH indicates multiple DL TB transmission and disables HARQ feedback. HARQ feedback is not enabled or disabled for any HARQ process in the multiple DL TBs through RRC configuration, and the HARQ RTT timer corresponding to any HARQ process of the TB is not started.

[0257] The optional implementation of step S6117 can refer to the optional implementation of step S5118 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0258] Step S6118: The PDCCH indicates single UL TB transmission, the PDCCH configures the HARQ mode of the HARQ process of UL transmission to Mode A, and starts the UL HARQ RTT timer corresponding to the HARQ process.

[0259] The optional implementation of step S6118 can refer to the optional implementation of step S5119 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0260] In step S6119, the PDCCH indicates multiple UL TB transmissions, the PDCCH configures the HARQ Mode to Mode A, and starts the UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs.

[0261] The optional implementation of step S6119 can refer to the optional implementation of step S5120 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0262] In step S6120, the PDCCH indicates single UL TB transmission, the PDCCH configures the HARQ Mode of the HARQ process of UL transmission to Mode B, and does not start the UL HARQ RTT timer corresponding to the HARQ process.

[0263] The optional implementation of step S6120 can refer to the optional implementation of step S5121 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0264] In step S6121, the PDCCH indicates multiple UL TB transmissions, the PDCCH configures the HARQ Mode to Mode B, and does not start the UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs.

[0265] The optional implementation of step S6121 can refer to the optional implementation of step S5122 in Figure 5 and other related parts in the embodiment involved in Figure 5, which will not be repeated here.

[0266] The communication method involved in the embodiments of the present disclosure may include at least one of steps S6101 to S6121. For example, step S6101 may be implemented as an independent embodiment, step S6103 may be implemented as an independent embodiment, steps S6101 to S6102 may be implemented as an independent embodiment, and steps S6101 to S6102 and step S6104 may be implemented as independent embodiments, but are not limited thereto.

[0267] In some embodiments, steps S6102 and 6103 may be executed in an exchanged order or simultaneously, and steps S6102 and 6104 may be executed in an exchanged order or simultaneously.

[0268] In some embodiments, steps S6102 to S6121 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0269] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 6 .

[0270] 6B is a flow chart of a method for starting a timer according to an embodiment of the present disclosure. As shown in FIG6B , the embodiment of the present disclosure relates to a method for starting a timer, and the method includes:

[0271] Step S6201: PDCCH indicates multiple DL TB transmissions and indicates enabling HARQ feedback. The HARQ process corresponding to any of the multiple DL TBs is enabled through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process corresponding to any of the TBs is started.

[0272] Step S6202: Determine the start time of the HARQ RTT timer as the subframe in which the terminal receives the last repetition of the last TB, wherein the HARQ RTT timer is a timer corresponding to the downlink.

[0273] Optional implementations of step S6201 can be found in step S5109 of FIG. 5 , optional implementations of step S6108 of FIG. 6A , and other related parts in the embodiments involved in FIG. 5 and FIG. 6A , which will not be described in detail here.

[0274] The communication method involved in the embodiments of the present disclosure may include at least one of steps S6201 and S6202. For example, step S6201 may be implemented as an independent embodiment, step S6202 may be implemented as an independent embodiment, and steps S6201 and S6202 may be implemented as independent embodiments, but are not limited thereto.

[0275] In some embodiments, step S6202 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0276] In the embodiment of the present disclosure, step S6202 may be combined with step S5110 of FIG. 5 , and step S6202 may be combined with step S6109 of FIG. 6A .

[0277] FIG6C is a flow chart of a method for starting a timer according to an embodiment of the present disclosure. As shown in FIG6C , the embodiment of the present disclosure relates to a method for starting a timer, and the method includes:

[0278] Step S6301: PDCCH indicates multiple UL TB transmission, PDCCH configures HARQ Mode to Mode A, and starts the UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs;

[0279] Step S6302: Determine the start time of the UL HARQ RTT timer as the subframe in which the last repetition of the last TB sent by the terminal is located, where the UL HARQ RTT timer is a timer corresponding to the uplink.

[0280] The optional implementation of step S6301 can refer to the optional implementation of step S5120 in Figure 5, step S6119 in Figure 6A, and other related parts in the embodiments involved in Figures 5 and 6A, which will not be repeated here.

[0281] The communication method involved in the embodiments of the present disclosure may include at least one of steps S6301 and S6302. For example, step S6301 may be implemented as an independent embodiment, step S6302 may be implemented as an independent embodiment, and steps S6301 and S6302 may be implemented as independent embodiments, but are not limited thereto.

[0282] In some embodiments, step S6302 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0283] FIG6D is a flow chart of a method for starting a timer according to an embodiment of the present disclosure. As shown in FIG6D , the embodiment of the present disclosure relates to a method for starting a timer, and the method includes:

[0284] Step S6401: The PDCCH indicates single DL TB transmission and enables HARQ feedback for the hybrid automatic repeat request (HARQ) process for DL ​​transmission. The HARQ process enables HARQ feedback through RRC configuration and starts the HARQ RTT timer corresponding to the HARQ process.

[0285] Step S6402: Determine the start time of the HARQ RTT timer as the subframe in which the last repetition of the TB received by the terminal is located, wherein the HARQ RTT timer is a timer corresponding to the downlink.

[0286] Optional implementations of step S6401 can be found in step S5120 of FIG. 5 , optional implementations of step S6121 of FIG. 6A , and other related parts in the embodiments involved in FIG. 5 and FIG. 6A , which will not be described in detail here.

[0287] The communication method involved in the embodiments of the present disclosure may include at least one of steps S6401 and S6402. For example, step S6401 may be implemented as an independent embodiment, step S6402 may be implemented as an independent embodiment, and steps S6401 and S6402 may be implemented as independent embodiments, but are not limited thereto.

[0288] In some embodiments, step S6402 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0289] In the embodiment of the present disclosure, step S6402 may be combined with step S5108 of FIG. 5 , and step S6402 may be combined with step S6107 of FIG. 6A .

[0290] FIG6E is a flow chart of a method for starting a timer according to an embodiment of the present disclosure. As shown in FIG6E , the embodiment of the present disclosure relates to a method for starting a timer, and the method includes:

[0291] Step S6501: The PDCCH indicates single UL TB transmission, the PDCCH configures the HARQ mode of the HARQ process for UL transmission to Mode A, and starts the UL HARQ RTT timer corresponding to the HARQ process;

[0292] Step S6502: Determine the start time of the UL HARQ RTT timer as the subframe in which the last repetition of the terminal sending the TB is located, where the UL HARQ RTT timer is a timer corresponding to the uplink.

[0293] The optional implementation of step S6501 can refer to the optional implementation of step S5119 in Figure 5, step S6118 in Figure 6A, and other related parts in the embodiments involved in Figures 5 and 6A, which will not be repeated here.

[0294] The communication method involved in the embodiments of the present disclosure may include at least one of steps S6501 and S6502. For example, step S6501 may be implemented as an independent embodiment, step S6502 may be implemented as an independent embodiment, and steps S6501 and S6502 may be implemented as independent embodiments, but are not limited thereto.

[0295] In some embodiments, step S6502 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0296] FIG7A is a flow chart of a method for starting a timer according to an embodiment of the present disclosure. As shown in FIG7A , the embodiment of the present disclosure relates to a method for starting a timer, and the method includes:

[0297] In step S7101, a physical downlink control channel (PDCCH) indicates link transmission, and at least one of a hybrid automatic repeat request mode (HARQ mode) configuration and a hybrid automatic repeat request feedback (HARQ feedback) configuration of the PDCCH is sent to the terminal, wherein at least one of the HARQ mode configuration and the HARQ feedback configuration is used to determine whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission.

[0298] In some embodiments, the network device 102 sends at least one of the hybrid automatic repeat request mode HARQ mode configuration and the hybrid automatic repeat request feedback HARQ feedback configuration to the terminal 101, but is not limited to this. It can also send at least one of the hybrid automatic repeat request mode HARQ mode configuration and the hybrid automatic repeat request feedback HARQ feedback configuration to other entities.

[0299] For example, in one embodiment of the present disclosure, at least one of the HARQ mode configuration and the HARQ feedback configuration is used by terminal 101 to determine whether to start a hybrid automatic repeat request round trip timer corresponding to link transmission. For optional implementations thereof, see the optional implementations of step S5101 in FIG. 5 and other related portions of the embodiment involved in FIG. These will not be further described here.

[0300] Step S7102 , in one embodiment of the present disclosure, the network device 102 may send an RRC configuration to the terminal 101 .

[0301] The communication method involved in the embodiments of the present disclosure may include at least one of steps S7101 and S7102. For example, step S7101 may be implemented as an independent embodiment, step S7102 may be implemented as an independent embodiment, and step S7101 + step S7102 may be implemented as independent embodiments, but the present invention is not limited thereto.

[0302] In some embodiments, steps S7101 and 7102 may be performed in an interchanged order or simultaneously.

[0303] In some embodiments, step S7102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0304] FIG8A is a flow chart of a method for starting a timer according to an embodiment of the present disclosure. As shown in FIG8A , the embodiment of the present disclosure relates to a method for starting a timer, and the method includes:

[0305] In step S8101, if the physical downlink control channel (PDCCH) indicates uplink (UL) or downlink (DL) transmission, the terminal determines whether to start the hybrid automatic repeat request round-trip time timer HARQ RTT timer or the uplink hybrid automatic repeat request round-trip time timer UL HARQ RTT timer based on the HARQ mode or feedback configuration of the PDCCH.

[0306] Optionally, for downlink multiple transmission blocks (TBs), the start time of the HARQ RTT timer may be the subframe in which the terminal receives the last repetition of the last TB.

[0307] Optionally, for uplink multi-TB transmission, the start time of the UL HARQ RTT timer may be the subframe in which the last repetition of the last TB sent by the terminal is located.

[0308] Optionally, for downlink single TB transmission, the start time of the HARQ RTT timer may be the subframe in which the terminal receives the last repetition of the TB.

[0309] Optionally, for uplink single TB transmission, the start time of the UL HARQ RTT timer may be the subframe in which the terminal sends the last repetition of the TB.

[0310] In step S8102, if the PDCCH indicates single DL TB transmission, if the PDCCH indicates to turn on HARQ feedback for the HARQ process of the DL transmission, if the HARQ process is configured to turn on HARQ feedback through RRC, or if HARQ feedback is not turned on or off through Radio Resource Control (RRC) configuration (that is, HARQ feedback is neither configured to be turned on nor configured to be turned off), the terminal can start the HARQ RTT timer corresponding to the HARQ process.

[0311] In step S8103, if the PDCCH indicates multiple DL TB transmissions, and if the PDCCH indicates that HARQ feedback is enabled, the terminal may start the corresponding HARQ RTT timer for each HARQ process corresponding to each TB for which HARQ feedback is enabled through RRC configuration, or for which HARQ feedback is not enabled / disabled through RRC configuration (i.e., HARQ feedback is neither enabled nor disabled).

[0312] In step S8104, if the PDCCH indicates single DL TB transmission, if the PDCCH indicates to enable HARQ feedback of the HARQ process of the DL transmission, and if the HARQ process is configured to disable HARQ feedback through RRC, the terminal may not start the HARQ RTT timer corresponding to the HARQ process.

[0313] In step S8105, if the PDCCH indicates multiple DL TB transmissions and if the PDCCH indicates enabling HARQ feedback, the terminal may not start the corresponding HARQ RTT timer for the HARQ processes corresponding to all TBs that are configured to disable HARQ feedback through RRC.

[0314] In step S8106, if the PDCCH indicates single DL TB transmission, and if the PDCCH indicates turning off HARQ feedback of the HARQ process for the DL transmission, the terminal may not start the HARQ RTT timer corresponding to the HARQ process regardless of whether the HARQ process is configured to turn off or turn on HARQ feedback or not configured through RRC.

[0315] In step S8107, if the PDCCH indicates multiple DL TB transmissions, and if the PDCCH indicates that HARQ feedback is disabled, for each HARQ process corresponding to all TBs, regardless of whether HARQ feedback is disabled or enabled or not configured through RRC, the terminal may not start the HARQ RTT timer corresponding to the HARQ process.

[0316] Step S8108: If the PDCCH indicates single UL TB transmission, and if the HARQ Mode of the HARQ process configured by the PDCCH for the UL transmission is Mode A, the terminal may start the UL HARQ RTT timer corresponding to the HARQ process.

[0317] In step S8109, if the PDCCH indicates multiple UL TB transmissions and if the PDCCH configures the HARQ Mode to Mode A, the terminal may start the corresponding UL HARQ RTT timer for the HARQ processes corresponding to all TBs.

[0318] Step S8110: If the PDCCH indicates single UL TB transmission, and if the HARQ Mode of the HARQ process configured by the PDCCH for the UL transmission is Mode B, the terminal may not start the UL HARQ RTT timer corresponding to the HARQ process.

[0319] In step S8111, if the PDCCH indicates multiple UL TB transmissions and if the PDCCH configures the HARQ Mode to Mode B, the terminal may not start the corresponding UL HARQ RTT timer for the HARQ processes corresponding to all TBs.

[0320] The communication method involved in the embodiments of the present disclosure may include at least one of steps S8101 to S8111. For example, step S8101 may be implemented as an independent embodiment, step S8102 may be implemented as an independent embodiment, and step S8102 and step S8108 may be implemented as independent embodiments, but are not limited thereto.

[0321] In some embodiments, step S8102 and step S8108 may be executed in an exchanged order or simultaneously, and step S8102 and step S8109 may be executed in an exchanged order or simultaneously.

[0322] In some embodiments, steps S8102 to S8111 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0323] In some embodiments, steps S8103 to S8111 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0324] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0325] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0326] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0327] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0328] FIG9A is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure. As shown in FIG9A , terminal 9100 may include a transceiver module 9101. In some embodiments, processing module 9101 is configured to determine whether to start a hybrid automatic repeat request round trip timer corresponding to a link transmission when a physical downlink control channel (PDCCH) indicates link transmission, based on at least one of a hybrid automatic repeat request (HARQ) mode configuration and a hybrid automatic repeat request (HARQ) feedback configuration indicated by the PDCCH. Optionally, the above-mentioned processing module 9101 is used to execute at least one of the communication steps such as sending and / or receiving performed by the terminal 101 in any of the above methods (for example, step 5102, step 5103, step 5104, step 5105, step 5106, step 5107, step 5108, step 5109, step 5110, step 5111, step 5112, step 5113, step 5114, step 5115, step 5116, step 5117, step 5118, step 5119, step 5120, step 5121, step 5122, but not limited to these), which will not be repeated here.

[0329] FIG9B is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure. As shown in FIG9B , the network device 9200 may include: a transceiver module 9201 configured to indicate link transmission via a physical downlink control channel (PDCCH) and transmit at least one of a hybrid automatic repeat request (HARQ) mode configuration and a hybrid automatic repeat request (HARQ) feedback configuration of the PDCCH to a terminal, wherein at least one of the HARQ mode configuration and the HARQ feedback configuration is used to determine whether to start a hybrid automatic repeat request round trip timer corresponding to the link transmission.

[0330] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0331] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0332] Figure 10A is a schematic diagram of the structure of a communication device 10100 proposed in an embodiment of the present disclosure. Communication device 10100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user device, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 10100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0333] As shown in FIG10A , a communication device 10100 includes one or more processors 10101. Processor 10101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control a communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.), execute programs, and process program data. The communication device 10100 is used to perform any of the above methods.

[0334] In some embodiments, the communication device 10100 further includes one or more memories 10102 for storing instructions. Optionally, all or part of the memory 10102 may be located outside the communication device 10100.

[0335] In some embodiments, the communication device 10100 further includes one or more transceivers 10103. When the communication device 10100 includes one or more transceivers 10103, the transceiver 10103 performs the communication steps such as sending and / or receiving in the above method (for example, step 5102, step 5103, step 5104, step 5105, step 5106, step 5107, step 5108, step 5109, step 5110, step 5111, step 5112, step 5113, step 5114, step 5115, step 5116, step 5117, step 5118, step 5119, step 5120, step 5121 , step 5122, but not limited to this), the processor 10101 executes at least one of the other steps (for example, step 5102, step 5103, step 5104, step 5105, step 5106, step 5107, step 5108, step 5109, step 5110, step 5111, step 5112, step 5113, step 5114, step 5115, step 5116, step 5117, step 5118, step 5119, step 5120, step 5121, step 5122, but not limited to this).

[0336] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0337] In some embodiments, the communication device 10100 may include one or more interface circuits 10104. Optionally, the interface circuit 10104 is connected to the memory 10102. The interface circuit 10104 may be configured to receive signals from the memory 10102 or other devices, or to send signals to the memory 10102 or other devices. For example, the interface circuit 10104 may read instructions stored in the memory 10102 and send the instructions to the processor 10101.

[0338] The communication device 10100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 10100 described in the present disclosure is not limited thereto, and the structure of the communication device 10100 may not be limited by FIG. 10A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0339] 10B is a schematic diagram of the structure of a chip 10200 according to an embodiment of the present disclosure. If the communication device 10100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 10200 shown in FIG10B , but the present disclosure is not limited thereto.

[0340] Chip 10200 includes one or more processors 10201, and chip 10200 is used to execute any of the above methods.

[0341] In some embodiments, chip 10200 further includes one or more interface circuits 10202. Optionally, interface circuit 10202 is connected to memory 10203. Interface circuit 10202 can be used to receive signals from memory 10203 or other devices, or to send signals to memory 10203 or other devices. For example, interface circuit 10202 can read instructions stored in memory 10203 and send the instructions to processor 10201.

[0342] In some embodiments, the interface circuit 10202 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step 5102, step 5103, step 5104, step 5105, step 5106, step 5107, step 5108, step 5109, step 5110, step 5111, step 5112, step 5113, step 5114, step 5115, step 5116, but not limited to these), and the processor 10201 performs at least one of the other steps (for example, step 5102, step 5103, step 5104, step 5105, step 5106, step 5107, step 5108, step 5109, step 5110, step 5111, step 5112, step 5113, step 5114, step 5115, step 5116, but not limited to these).

[0343] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0344] In some embodiments, the chip 10200 further includes one or more memories 10203 for storing instructions. Alternatively, all or part of the memories 10203 may be outside the chip 10200.

[0345] The present disclosure also provides a storage medium having instructions stored thereon. When the instructions are executed on the communication device 10100, the communication device 10100 is caused to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0346] The present disclosure also provides a program product, which, when executed by the communication device 10100, enables the communication device 10100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0347] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A timer starting method, characterized in that: The method comprises: A physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determines whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission.

2. The method according to claim 1, characterized in that The method further comprises: The link transmission is a downlink multi-transmission block TB transmission, and the start time of the HARQ RTT timer is determined to be the subframe in which the last repetition repetition of the last TB received by the terminal is located, wherein the HARQ RTT timer is a timer corresponding to the downlink.

3. The method according to claim 1, characterized in that The method further comprises: The link transmission is uplink multi-TB transmission, and the start time of the UL HARQ RTT timer is determined to be the subframe in which the last repetition of the terminal sending the last TB is located, wherein the UL HARQ RTT timer is a timer corresponding to the uplink.

4. The method according to claim 1, characterized in that The method further comprises: The link transmission is a downlink single TB transmission, and the start time of the HARQ RTT timer is determined to be the subframe in which the last repetition of the TB received by the terminal is located, wherein the HARQ RTT timer is a timer corresponding to the downlink.

5. The method according to claim 1, characterized in that The method further comprises: The link transmission is uplink single TB transmission, and the start time of the UL HARQ RTT timer is determined to be the subframe in which the last repetition of the terminal sending the TB is located, wherein the UL HARQ RTT timer is a timer corresponding to the uplink.

6. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates single DL TB transmission, and the PDCCH indicates to enable HARQ feedback of a hybrid automatic repeat request process HARQ process of the DL transmission, the HARQ process enables the HARQ feedback through RRC configuration, and starts a HARQ RTT timer corresponding to the HARQ process.

7. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates a single DL TB transmission, and the PDCCH indicates to turn on HARQ feedback of a hybrid automatic repeat request process HARQ process of the DL transmission, the HARQ process does not turn on or off the HARQ feedback through the RRC configuration, and starts a HARQ RTT timer corresponding to the HARQ process.

8. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates that multiple DL TBs are transmitted, and the PDCCH indicates that HARQ feedback is turned on, and any of the multiple DL TBs The HARQ process corresponding to a TB turns on the HARQ feedback through RRC configuration, and starts the HARQ RTT timer corresponding to the HARQ process corresponding to any TB.

9. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates multiple DL TB transmissions, and the PDCCH indicates turning on HARQ feedback, a HARQ process corresponding to any TB in the multiple DL TBs does not turn on or off the HARQ feedback through the RRC configuration, and a HARQ RTT timer corresponding to the HARQ process corresponding to any TB is started.

10. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates single DL TB transmission, and the PDCCH indicates to turn on HARQ feedback of the HARQ process of the DL transmission, the HARQ process turns off the HARQ feedback through RRC configuration, and does not start a HARQ RTT timer corresponding to the HARQ process.

11. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates multiple DL TB transmissions, and the PDCCH indicates opening of HARQ feedback, the HARQ process corresponding to any TB in the multiple DL TBs closes the HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

12. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates single DL TB transmission, and the PDCCH indicates turning off HARQ feedback of the HARQ process of the DL transmission, the HARQ process turns off the HARQ feedback through RRC configuration, and does not start a HARQ RTT timer corresponding to the HARQ process.

13. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates single DL TB transmission, and the PDCCH indicates turning off HARQ feedback of the HARQ process of the DL transmission, the HARQ process turns on the HARQ feedback through RRC configuration, and does not start a HARQ RTT timer corresponding to the HARQ process.

14. The method according to claim 1, wherein: The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates single DL TB transmission, and the PDCCH indicates turning off HARQ feedback of the HARQ process of the DL transmission, the HARQ feedback of the HARQ process is not turned on or off through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process is not started.

15. The method according to claim 1, wherein: The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates multiple DL TB transmissions, and the PDCCH indicates closing HARQ feedback, the HARQ process corresponding to any TB in the multiple DL TBs closes the HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

16. The method according to claim 1, wherein: The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates multiple DL TB transmissions, and the PDCCH indicates closing HARQ feedback, the HARQ process corresponding to any TB in the multiple DL TBs turns on the HARQ feedback through RRC configuration, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

17. The method according to claim 1, wherein: The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates multiple DL TB transmissions, and the PDCCH indicates closing HARQ feedback, the HARQ process corresponding to any TB in the multiple DL TBs is not configured to open or close the HARQ feedback through RRC, and the HARQ RTT timer corresponding to the HARQ process of any TB is not started.

18. The method of claim 1, wherein: The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates a single UL TB transmission, the PDCCH configures the HARQ mode Mode of the HARQ process of the UL transmission to Mode A, and starts a UL HARQ RTT timer corresponding to the HARQ process.

19. The method according to claim 1, characterized in that The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates multiple UL TB transmissions, the PDCCH configures the HARQ Mode to the Mode A, and starts the UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs.

20. The method of claim 1, wherein: The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates a single UL TB transmission, the PDCCH configures the HARQ Mode of the HARQ process of the UL transmission to Mode B, and does not start the UL HARQ RTT timer corresponding to the HARQ process.

21. The method of claim 1, wherein: The physical downlink control channel PDCCH indicates link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determining whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission, includes: The PDCCH indicates multiple UL TB transmissions, the PDCCH configures the HARQ Mode to the Mode B, and does not start the UL HARQ RTT timer corresponding to the HARQ process of any TB in the multiple TBs.

22. A timer starting method, characterized in that: The method comprises: The physical downlink control channel PDCCH indicates link transmission, and sends at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH to the terminal, wherein at least one of the HARQ mode configuration and the HARQ feedback configuration is used to determine whether to start a hybrid automatic repeat request round-trip time timer corresponding to the link transmission.

23. A terminal, characterized in that: The device comprises: A processing module is used for a physical downlink control channel PDCCH to indicate link transmission, and based on at least one of a hybrid automatic repeat request mode HARQ mode configuration and a hybrid automatic repeat request feedback HARQ feedback configuration of the PDCCH, determines whether to start a hybrid automatic repeat request round trip time timer corresponding to the link transmission.

24. A network device, characterized in that: The device comprises: A transceiver module is used for indicating link transmission via a physical downlink control channel (PDCCH), and sending at least one of a hybrid automatic repeat request mode (HARQ mode configuration) and a hybrid automatic repeat request feedback (HARQ feedback configuration) of the PDCCH to a terminal, wherein at least one of the HARQ mode configuration and the HARQ feedback configuration is used to determine whether to start a hybrid automatic repeat request round trip timer corresponding to the link transmission.

25. A terminal, characterized in that: include: one or more processors; The terminal is used to execute the timer starting method according to any one of claims 1 to 21.

26. A network device, characterized in that: include: one or more processors; Wherein, the terminal is used to execute the timer starting method described in claim 22.

27. A communication system, characterized in that: It comprises a terminal and a network device, wherein the terminal is configured to implement the timer starting method according to any one of claims 1 to 21, and the network device is configured to implement the timer starting method according to claim 22.

28. A storage medium storing instructions, characterized in that: When the instruction is executed on the communication device, the communication device executes the timer starting method according to any one of claims 1 to 21 or the timer starting method according to claim 22.

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