Search space group switching method and apparatus

1 . A search space group switching method, performed by a terminal, wherein the method comprises:

switching to a default search space group in a case that a first condition is met, wherein the default search space group is search space group 0; wherein

the first condition comprises:

expiration of a bandwidth part BWP inactivity timer.

2 . The method according to claim 1 , wherein the first condition further comprises at least one of the following:

determination of starting a discontinuous reception DRX onduration timer;

determination of switching to a first non-dormant bandwidth part BWP, wherein the first non-dormant BWP is a non-dormant BWP with a specific index.

3 . The method according to claim 2 , wherein in a case that the first condition further comprises determination of starting the DRX onduration timer, the switching to a default search space group comprises at least one of the following:

completing switching to the default search space group prior to starting of the DRX onduration timer;

starting an operation of switching to the default search space group prior to starting of the DRX onduration timer;

starting an operation of switching to the default search space group before a preset duration prior to starting of the DRX onduration timer;

starting an operation of switching to the default search space group at the determination of starting the DRX onduration timer; or

starting an operation of switching to the default search space group after the determination of starting the DRX onduration timer; wherein

the preset duration is greater than or equal to a switching delay or application delay of the search space group.

4 . The method according to claim 2 , wherein in a case that the first condition further comprises determination of switching to the first non-dormant BWP, the switching to a default search space group comprises at least one of the following:

completing switching to the default search space group prior to switching to the first non-dormant BWP;

starting an operation of switching to the default search space group at the determination of switching to the first non-dormant BWP; or

starting an operation of switching to the default search space group after the determination of switching to the first non-dormant BWP.

5 . The method according to claim 2 , further comprising:

switching to the default search space group or skipping search space group switching in a case that a second condition is met; wherein

the second condition comprises at least one of the following:

determination of not starting a DRX onduration timer;

entry to a time at which no physical downlink control channel PDCCH monitoring is performed;

entry to a time at which monitoring on a specific PDCCH is not performed; or

determination of switching to a dormant BWP.

6 . The method according to claim 2 , wherein whether to start a DRX onduration timer or not is determined based on at least one of the following:

a wake-up indication in first DCI detected;

whether a DRX function is configured;

whether first DCI is detected;

whether monitoring for first DCI is required; or

a value of PS-wakeup; wherein

the first DCI is scrambled by a PS-RNTI.

7 . The method according to claim 2 , wherein in a case that only a DRX function is configured, a method for determining to start a DRX onduration timer comprises:

determining, by the terminal, to start the DRX onduration timer prior to each DRX onduration.

8 . The method according to claim 2 , wherein whether to switch to a first dormant BWP or a dormant BWP is determined based on a secondary cell dormancy indication, wherein the secondary cell dormancy indication is carried in second DCI, the second DCI comprising at least one of the following:

first DCI, the first DCI being scrambled by a power saving radio network temporary identifier PS-RNTI;

DCI for scheduling data; or

DCI not for scheduling data.

9 . The method according to claim 8 , wherein the switching to a default search space group comprises at least one of the following:

switching a cell of a switching cell group in which a cell of a secondary cell group indicated by the secondary cell dormancy indication to switch to a first non-dormant BWP is located to a default search space group;

switching a cell of a switching cell group in which a secondary cell indicated by the secondary cell dormancy indication to switch to a first non-dormant BWP is located to a default search space group;

switching a cell of a switching cell group in which a cell of a secondary cell group indicated by the secondary cell dormancy indication to switch to a dormant BWP is located to a default search space group; or

switching a cell of a switching cell group in which a secondary cell indicated by the secondary cell dormancy indication to switch to a dormant BWP is located to a default search space group.

10 . The method according to claim 1 , wherein the switching to a default search space group comprises at least one of the following:

starting an operation of switching to the default search space group at the expiration of the BWP inactivity timer; or

starting an operation of switching to the default search space group after the expiration of the BWP inactivity timer.

11 . The method according to claim 1 , wherein the default search space group comprises no dormant search space group, wherein the terminal skips PDCCH monitoring or does not need to perform specific PDCCH monitoring in a case that the dormant search space group is applied.

12 . The method according to claim 1 , after the switching to a default search space group, further comprising:

determining a PDCCH monitoring behavior of the terminal based on at least one of the following:

whether the switching to the default search space group has been completed;

whether the terminal is in active time; or

whether the terminal is in a dormant state.

13 . A terminal, comprising a processor, a memory, and a program or instructions stored in the memory and capable of running on the processor, wherein when the program or instructions are executed by the processor, the following steps are implemented:

switching to a default search space group in a case that a first condition is met, wherein the default search space group is search space group 0; wherein

the first condition comprises:

expiration of a bandwidth part BWP inactivity timer.

14 . The terminal according to claim 13 , wherein the first condition further comprises at least one of the following:

determination of starting a discontinuous reception DRX onduration timer;

determination of switching to a first non-dormant bandwidth part BWP, wherein the first non-dormant BWP is a non-dormant BWP with a specific index.

15 . The terminal according to claim 14 , wherein in a case that the first condition further comprises determination of switching to the first non-dormant BWP, the switching to a default search space group comprises at least one of the following:

completing switching to the default search space group prior to switching to the first non-dormant BWP;

starting an operation of switching to the default search space group at the determination of switching to the first non-dormant BWP; or

starting an operation of switching to the default search space group after the determination of switching to the first non-dormant BWP;

or,

in a case that the first condition further comprises determination of starting the DRX onduration timer, the switching to a default search space group comprises at least one of the following:

completing switching to the default search space group prior to starting of the DRX onduration timer;

starting an operation of switching to the default search space group prior to starting of the DRX onduration timer;

starting an operation of switching to the default search space group before a preset duration prior to starting of the DRX onduration timer;

starting an operation of switching to the default search space group at the determination of starting the DRX onduration timer; or

starting an operation of switching to the default search space group after the determination of starting the DRX onduration timer; wherein

the preset duration is greater than or equal to a switching delay or application delay of the search space group.

16 . The terminal according to claim 14 , wherein when the program or instructions are executed by the processor, the following steps are implemented:

switching to the default search space group or skipping search space group switching in a case that a second condition is met; wherein

the second condition comprises at least one of the following:

determination of not starting a DRX onduration timer;

entry to a time at which no physical downlink control channel PDCCH monitoring is performed;

entry to a time at which monitoring on a specific PDCCH is not performed; or

determination of switching to a dormant BWP.

17 . The terminal according to claim 14 , wherein whether to start a DRX onduration timer or not is determined based on at least one of the following:

a wake-up indication in first DCI detected;

whether a DRX function is configured;

whether first DCI is detected;

whether monitoring for first DCI is required; or

a value of PS-wakeup; wherein

the first DCI is scrambled by a PS-RNTI.

18 . The terminal according to claim 14 , wherein whether to switch to a first dormant BWP or a dormant BWP is determined based on a secondary cell dormancy indication, wherein the secondary cell dormancy indication is carried in second DCI, the second DCI comprising at least one of the following:

first DCI, the first DCI being scrambled by a power saving radio network temporary identifier PS-RNTI;

DCI for scheduling data; or

DCI not for scheduling data.

19 . The terminal according to claim 13 , wherein the switching to a default search space group comprises at least one of the following:

starting an operation of switching to the default search space group at the expiration of the BWP inactivity timer; or

starting an operation of switching to the default search space group after the expiration of the BWP inactivity timer.

20 . A non-transitory readable storage medium, wherein the non-transitory readable storage medium stores a program or instructions, and when the program or instructions are executed by a processor, the following steps are implemented:

switching to a default search space group in a case that a first condition is met wherein the default search space group is search space group 0; wherein

the first condition comprises:

expiration of a bandwidth part BWP inactivity timer.