System information updates in band width part (BWP) switch operation

1. A method for a user equipment (UE) of a connected state, the method comprising:

receiving a system information (SI) change indication broadcasted by a paging via a currently active bandwidth part (BWP) during a modification period;

in response to receiving the SI change indication, switching from the currently active BWP to an initial active BWP for an SI update;

receiving remaining minimum SI (RMSI) via the initial active BWP during a next modification period that immediately follows the modification period, wherein the RMSI includes information associated with changed system information blocks (SIBs);

determining which of the changed SIBs is required to be updated for the UE according to the received RMSI; and

receiving content of the required changed SIBs based on the determination.

2. The method of claim 1 , wherein the currently active BWP is switched to the initial active BWP automatically on the end of the modification period.

3. The method of claim 1 , wherein the currently active BWP is switched to the initial active BWP immediately upon receiving the SI change indication.

4. The method of claim 1 , wherein the currently active BWP is switched to the initial active BWP in response to receiving downlink control information (DCI).

5. The method of claim 1 , further comprising:

completing the SI update of the required changed SIBs within the next modification period in response to receiving the content of the required changed SIBs.

6. The method of claim 1 , further comprising:

sending an SI update complete indication as a feedback indicating completeness of the SI update via an uplink BWP.

7. The method of claim 1 , wherein the UE is pre-configured with a default BWP and a BWP inactivity timer for the connected state, and wherein the UE starts the BWP inactivity timer after switching off the default BWP and switches back to the default BWP after the BWP inactivity timer expires.

8. The method of claim 7 , wherein the BWP inactivity timer stops after the currently active BWP for data transmission is switched to an initial active BWP in response to receiving the SI change indication.

9. The method of claim 7 , wherein the BWP inactivity timer is further configured to have a short period and a long period, and wherein the UE selects the long period for the BWP inactivity timer upon receiving the SI change indication.

10. The method of claim 7 , wherein the UE stays on the initial active BWP in order to complete the SI update after the BWP inactivity timer expires.

11. A user equipment (UE) for wireless communication, comprising:

a non-transitory machine-readable medium storing computer-executable instructions;

a processor coupled to the non-transitory computer-readable medium, and configured to execute the computer-executable instructions to cause the UE of a connected state to perform operations comprising:

receiving a system information (SI) change indication broadcasted by a paging via a currently active bandwidth part (BWP) during a modification period;

in response to receiving the SI change indication, switching from currently active BWP to an initial active BWP for an SI update; and

receiving remaining minimum SI (RMSI) via the initial active BWP during a next modification period that immediately follows the modification period, wherein the RMSI includes information associated with changed system information block (SIB);

determining which of the changed SIBs is required to be updated for the UE according to the received RMSI; and

receiving content of the required changed SIBs based on the determination.

12. The UE of claim 11 , wherein the currently active BWP is switched to the initial active BWP automatically on the end of the modification period.

13. The UE of claim 11 , wherein the currently active BWP is switched to the initial active BWP immediately upon receiving the SI change indication.

14. The UE of claim 11 , wherein the currently active BWP is switched to the initial active BWP in response to receiving downlink control information (DCI).

15. The UE of claim 11 , wherein the processor is further configured to execute the computer-executable instructions to cause the UE of a connected state to perform operations comprising:

completing the SI update of the required changed SIBs within the next modification period in response to receiving the content of the required changed SIBs.

16. The UE of claim 15 , wherein the processor is further configured to execute the computer-executable instructions to cause the UE of a connected state to perform operations comprising:

sending an SI update complete indication as a feedback indicating completeness of the SI update via an uplink BWP.

17. The UE of claim 11 , wherein the UE is pre-configured with a default BWP and a BWP inactivity timer for the connected state, and wherein the UE starts the BWP inactivity timer after switching off the default BWP and switches back to the default after the BWP inactivity timer expires.

18. The UE of claim 17 , wherein the BWP inactivity timer stops after the currently active BWP for data transmission is switched to an initial active BWP in response to receiving the SI change indication.

19. The UE of claim 17 , wherein the BWP inactivity timer is further configured to have a short period and a long period, and wherein the UE selects the long period for the BWP inactivity timer upon receiving the SI change indication.

20. The UE of claim 17 , wherein the UE stays on the initial active BWP in order to complete the SI update after the BWP inactivity timer expires.