Patent ID: 11968614
Assignee: MEDIATEK SINGAPORE PTE. LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method for handling access type restriction information, executed by a UE communicatively connected to a 3rd Generation Partnership Project (3GPP) core network over one or both of a 3GPP access network and a non-3GPP access network, the method comprising:
obtaining information indicating that the UE is not allowed to access the 3GPP core network over the non-3GPP access network; and
accessing the 3GPP core network over the 3GPP access network based on the obtained information;
in response to the 3GPP core network being a 5G Core Network (5GCN) and the information indicating that the UE is not allowed to access the 3GPP core network over the non-3GPP access network,
setting a 5GS update status to “5U3 ROAMING NOT ALLOWED”; and
deleting a 5G Globally Unique Temporary UE Identity (GUTI), a last visited registered Tracking Area Identity (TAI), a TAI list, and a Key Set Identifier for Next Generation Radio Access Network (ngKSI),
wherein the information is obtained from a response message of a registration procedure or a configuration update command received from the 3GPP core network, or from subscription data stored in the UE.