Method for downlink BWP activation and deactivation, and terminal device

1. A method for downlink bandwidth part (BWP) activation and deactivation, applied to a terminal device, the method comprising:

performing, based on control of a network device, activation and deactivation of at least one downlink BWP configured on a carrier of the terminal device;

wherein deactivation of the at least one downlink BWP is controlled by at least one inactivity timer configured by the network device, comprises:

acquiring the at least one inactivity timer configured by the network device for at least part of other downlink BWPs, except an initial BWP, of the at least one downlink BWP;

starting the inactivity timer corresponding to a downlink BWP when data transmission or reception occurred on the downlink BWP;

controlling, through the inactivity timer, a duration during which the downlink BWP is kept in an active state after entering the active state; and

stopping the inactivity timer when the terminal device initiates a random access procedure.

2. The method of claim 1 , further comprising:

when the inactivity timer corresponding to the downlink BWP expires, controlling the downlink BWP to be switched to an inactive state; and

detecting a number of downlink BWPs presently in the active state, and when the number of the downlink BWPs is 1, controlling to replace the downlink BWP presently in the active state with an initial BWP to activate the initial BWP and deactivate the downlink BWP presently in the active state.

3. A terminal device, comprising:

a processor;

a network interface; and

a memory for storing computer program instructions that, when executed by the processor, cause the processor to perform, based on control of a network device, activation and deactivation of at least one downlink bandwidth part (BWP) configured on a carrier of the terminal device,

wherein the processor is further configured to control deactivation of the at least one downlink BWP by at least one inactivity timer configured by the network device, which comprises:

acquiring, through the network interface, the at least one inactivity timer configured by the network device for at least part of other downlink BWPs, except an initial BWP, of the at least one downlink BWP;

starting the inactivity timer corresponding to a downlink BWP when data transmission or reception occurred on the downlink BWP;

controlling, through the inactivity timer, a duration during which the downlink BWP is kept in an active state after entering the active state; and

stopping the inactivity timer when the terminal device initiates a random access procedure.

4. The terminal device of claim 3 , wherein the processor is configured to: when the inactivity timer corresponding to the downlink BWP expires, control the downlink BWP to be switched to an inactive state; and detect a number of downlink BWPs presently in the active state, and when the number of the downlink BWPs is 1, control to replace the downlink BWP presently in the active state with an initial BWP to activate the initial BWP and deactivate the downlink BWP presently in the active state.

5. A non-transitory computer readable storage medium, having stored thereon instructions that, when executed by a terminal device, cause the terminal device to execute a method for downlink bandwidth part (BWP) activation and deactivation comprising:

performing, based on control of a network device, activation and deactivation of at least one downlink BWP configured on a carrier of the terminal device;

wherein deactivation of the at least one downlink BWP is controlled by at least one inactivity timer configured by the network device, comprises:

acquiring the at least one inactivity timer configured by the network device for at least part of other downlink BWPs, except an initial BWP, of the at least one downlink BWP;

starting the inactivity timer corresponding to a downlink BWP when data transmission or reception occurred on the downlink BWP; and

controlling, through the inactivity timer, a duration during which the downlink BWP is kept in an active state after entering the active state; and

stopping the inactivity timer when the terminal device initiates a random access procedure.

6. The non-transitory computer readable storage medium of claim 5 , wherein the method further comprises:

when the inactivity timer corresponding to the downlink BWP expires, controlling the downlink BWP to be switched to an inactive state; and

detecting a number of downlink BWPs presently in the active state, and when the number of the downlink BWPs is 1, controlling to replace the downlink BWP presently in the active state with an initial BWP to activate the initial BWP and deactivate the downlink BWP presently in the active state.