Patent ID: 11877234
Assignee: APPLE INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method, performed by a User Equipment (UE), of attempting to maintain continuity of existing Protocol Data Unit (PDU) sessions on N1 mode, the method comprising:
obtaining active slices by authenticating them using Network Slice Specific Authentication and Authorization (NSSAA) procedure on a Fifth Generation (5G) New Radio (NR) roaming Public Land Mobile Network (PLMN); and
in response to a loss of coverage on the 5G NR roaming PLMN, searching for another 5G roaming PLMN that is different than the 5G NR roaming PLMN where the active slices were authenticated before searching a Long-Term Evolution (LTE) PLMN to attempt to maintain the active slices.