Wireless communication method and user equipment for non-public network control mechanisms

1. A user equipment (UE), comprising:

one or more non-transitory computer-readable media storing computer-executable instructions; and

at least one processor coupled to the one or more non-transitory computer-readable media and configured to execute the computer-executable instructions to cause the UE to:

receive, at an access stratum (AS) layer of the UE from a non-access stratum (NAS) layer of the UE, a stand-alone non-public network (SNPN) selection request when the NAS layer moves into an SNPN access mode or when the NAS layer remains in the SNPN access mode;

delete priorities provided by dedicated signaling when an SNPN selection in response to the SNPN selection request is performed by the UE; and

stop a T320 timer in response to receiving the SNPN selection request.

2. The UE of claim 1 , wherein the priorities provided by the dedicated signaling are is received through Evolved Universal Terrestrial Radio Access (E-UTRA) dedicated signaling to instruct the UE to move to an E-UTRA or New Radio (NR) (E-UTRA/NR) radio resource control (RRC) Inactive state or an E-UTRA/NR RRC Idle state.

3. The UE of claim 2 , wherein the at least one processor is further configured to execute the computer-executable instructions to cause the UE to:

configure an initial value for the T320 timer upon reception of a t320 value within the E-UTRA dedicated signaling or based on a remaining validity time inherited from E-UTRA protocols upon cell (re)selection to NR from E-UTRA while an inter-radio access technology (inter-RAT) (re)selection procedure is triggered.

4. The UE of claim 1 , wherein the priorities provided by the dedicated signaling are received through New Radio (NR) dedicated signaling to instruct the UE to move to an E-UTRA/NR RRC Inactive state or an E-UTRA/NR RRC Idle state.

5. The UE of claim 4 , wherein the at least one processor is further configured to execute the computer-executable instructions to cause the UE to:

configure an initial value for the T320 timer upon reception of a t320 value within the NR dedicated signaling or based on a remaining validity time inherited from E-UTRA protocols upon cell (re)selection to NR from E-UTRA while an inter-radio access technology (inter-RAT) (re)selection procedure is triggered.

6. The UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to cause the UE to:

implement a cell selection in a different radio access technology (RAT) by changing a RAT associated with the UE from E-UTRA to NR in response to the SNPN selection request being performed by the UE.

7. The UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to cause the UE to:

store redirected carrier information (redirectedCarrierInfo) after receiving a radio resource control (RRC) release (RRCRelease) message having the redirectedCarrierInfo; and

after performing the SNPN selection in response to receiving the SNPN selection request, perform at least one of the following:

abort or stop a cell selection procedure that is triggered after receiving the RRCRelease message having the redirectedCarrierInfo when the redirectedCarrierInfo indicates redirection to an Evolved Universal Terrestrial Radio Access (E-UTRA) cell; or

remove the stored redirectedCarrierInfo.

8. The UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to cause the UE to:

reconsider a cell as “not barred” after receiving the SNPN selection request if the cell is previously considered as “barred” by the UE.

9. The UE of claim 1 , wherein the at least one processor is further configured to execute the computer-executable instructions to cause the UE to:

apply at least one of a stored PLMN identity list and an SNPN identity list received from a serving cell as part of stored information without being impacted by SNPN access mode changes.

10. A method performed by a user equipment (UE), the method comprising:

receiving, at an access stratum (AS) layer of the UE from a non-access stratum (NAS) layer of the UE, a stand-alone non-public network (SNPN) selection request when the NAS layer moves into an SNPN access mode or when the NAS layer remains in the SNPN access mode;

deleting priorities provided by dedicated signaling when an SNPN selection in response to the SNPN selection request is performed by the UE; and

stopping a T320 timer in response to receiving the SNPN selection request.

11. The method of claim 10 , wherein the priorities provided by the dedicated signaling are received through Evolved Universal Terrestrial Radio Access (E-UTRA) dedicated signaling to instruct the UE to move to an E-UTRA or New Radio (NR) (E-UTRA/NR) radio resource control (RRC) Inactive state or an E-UTRA/NR RRC Idle state.

12. The method of claim 11 , further comprising:

configuring an initial value for the T320 timer upon reception of a t320 value within the E-UTRA dedicated signaling or based on a remaining validity time inherited from E-UTRA protocols upon cell (re)selection to NR from E-UTRA while an inter-radio access technology (inter-RAT) (re)selection procedure is triggered.

13. The method of claim 10 , wherein the priorities provided by the dedicated signaling are received through New Radio (NR) dedicated signaling to instruct the UE to move to an E-UTRA/NR RRC Inactive state or an E-UTRA/NR RRC Idle state.

14. The method of claim 13 , further comprising:

configuring an initial value for the T320 timer upon reception of a t320 value within the NR dedicated signaling or based on a remaining validity time inherited from E-UTRA protocols upon cell (re)selection to NR from E-UTRA while inter-RAT (re)selection procedure is triggered.

15. The method of claim 9 , further comprising:

implementing a cell selection in a different radio access technology (RAT) by changing a RAT associated with the UE from E-UTRA to NR in response to the SNPN selection request being performed by the UE.

16. The method of claim 10 , further comprising:

storing redirected carrier information (redirectedCarrierInfo) after receiving a radio resource control (RRC) release (RRCRelease) message having the redirectedCarrierInfo; and

after selecting the SNPN in response to receiving the SNPN selection request, performing at least one of the following:

aborting or stopping a cell selection procedure that is triggered after receiving the RRCRelease message having the redirectedCarrierInfo when the redirectedCarrierInfo indicates redirection to an Evolved Universal Terrestrial Radio Access (E-UTRA) cell; or

removing the stored redirectedCarrierInfo.

17. The method of claim 10 , further comprising:

reconsidering a cell as “not barred” after receiving the SNPN selection request if the cell is previously considered as “barred” by the UE.

18. The method of claim 10 , further comprising:

applying at least one of a stored PLMN identity list and an SNPN identity list received from a serving cell as part of stored information without being impacted by SNPN access mode changes.