Enhanced mechanism for accessing non-public network

1. A method of wireless communication of a mobile equipment (ME), comprising:

determining whether there is a closed access group (CAG) information list stored in a non-volatile memory in the ME;

in response to a determination that there is no CAG information list stored in the non-volatile memory, determining whether there is a CAG information list stored in a Universal Subscriber Identity Module (USIM) utilized by the ME, wherein the CAG information list includes an entry that specifying a public land mobile network (PLMN) ID and a CAG ID that in combination identify a CAG cell; and

when the CAG information list is stored in the USIM:

maintaining the CAG information list obtained from the USIM for selecting the CAG cell for the ME to access; and

searching for the CAG cell according to the CAG information list obtained from the USIM.

2. The method of claim 1 , wherein the determining whether there is a CAG information list stored in the USIM comprises:

determining whether there is a CAG information list stored in the USIM when the USIM is inserted into the ME.

3. The method of claim 1 , wherein the determining whether there is a CAG information list stored in the non-volatile memory in the ME comprises:

determining whether there is a CAG information list stored in the non-volatile memory in the ME when the USIM is inserted into the ME.

4. The method of claim 1 , further comprising:

based on the determining that there is no CAG information list stored in either the USIM or the non-volatile memory, initiating an emergency registration procedure;

obtaining a CAG information list through a Registration Accept or Registration Reject message during the emergency registration procedure; and

storing the obtained CAG information list in the non-volatile memory.

5. An apparatus for wireless communication, the apparatus being a mobile equipment (ME), comprising:

a memory; and

at least one processor coupled to the memory and configured to:

determine whether there is a closed access group (CAG) information list stored in a non-volatile memory in the ME;

in response to a determination that there is no CAG information list stored in the non-volatile memory, determine whether there is a closed access group (CAG) information list stored in a Universal Subscriber Identity Module (USIM) utilized by the ME, wherein the CAG information list includes an entry that specifying a public land mobile network (PLMN) ID and a CAG ID that in combination identify a CAG cell; and

when the CAG information list is stored in the USIM:

maintain the CAG information list obtained from the USIM for selecting the CAG cell for the ME to access; and

search for the CAG cell according to the CAG information list obtained from the USIM.

6. The apparatus of claim 5 , wherein to determine whether there is a CAG information list stored in the USIM, the at least one processor is further configured to:

determine whether there is a CAG information list stored in the USIM when the USIM is inserted into the ME.

7. The apparatus of claim 5 , wherein to determine whether there is a CAG information list stored in the non-volatile memory in the ME, the at least one processor is further configured to:

determine whether there is a CAG information list stored in the non-volatile memory in the ME when the USIM is inserted into the ME.

8. The apparatus of claim 5 , wherein the at least one processor is further configured to:

based on the determining that there is no CAG information list stored in either the USIM or the non-volatile memory, initiate an emergency registration procedure;

obtain a CAG information list through a Registration Accept or Registration Reject message during the emergency registration procedure; and

store the obtained CAG information list in the non-volatile memory.

9. A computer-readable medium storing computer executable code for wireless communication of a mobile equipment (ME), comprising code to:

determine whether there is a closed access group (CAG) information list stored in a non-volatile memory in the ME;

in response to a determination that there is no CAG information list stored in the non-volatile memory, determine whether there is a closed access group (CAG) information list stored in a Universal Subscriber Identity Module (USIM) utilized by the ME, wherein the CAG information list includes an entry that specifying a public land mobile network (PLMN) ID and a CAG ID that in combination identify a CAG cell; and

when the CAG information list is stored in the USIM:

maintain the CAG information list obtained from the USIM for selecting the CAG cell for the ME to access; and

search for the CAG cell according to the CAG information list obtained from the USIM.

10. The computer-readable medium of claim 9 , wherein to determine whether there is a CAG information list stored in the USIM, the code is further configured to:

determine whether there is a CAG information list stored in the USIM when the USIM is inserted into the ME.

11. The computer-readable medium of claim 9 , wherein to determine whether there is a CAG information list stored in the non-volatile memory in the ME, the code is further configured to:

determine whether there is a CAG information list stored in the non-volatile memory in the ME when the USIM is inserted into the ME.

12. The computer-readable medium of claim 9 , wherein the code is further configured to:

based on the determining that there is no CAG information list stored in either the USIM or the non-volatile memory, initiate an emergency registration procedure;

obtain a CAG information list through a Registration Accept or Registration Reject message during the emergency registration procedure; and

store the obtained CAG information list in the non-volatile memory.