Patent ID: 11917715
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A user equipment comprising:
a transceiver; and
a controller configured to:
receive, via the transceiver, system information block type 1 message that is broadcasted in a cell operated by an Access Network node that is connected to both Evolved Packet Core (EPC) and 5th Generation Core (5GC), the system information block type 1 message indicative of whether the cell supports Internet Protocol (IP) Multimedia Subsystem (IMS) emergency services via each of the EPC and the 5GC for the user equipment in limited service state, by including at least one of:
IMS-EmergencySupport information indicating whether the cell supports the IMS emergency services via the EPC for the user equipment in limited service state, and
IMS-EmergencySupport5GC information indicating whether the cell supports the IMS emergency services via the 5GC for the user equipment in limited service state; and

determine that the cell supports the IMS emergency services via at least one of the EPC and the 5GC, based on both of:
whether or not the IMS-EmergencySupport information is present in the system information block type 1 message, and
whether or not the IMS-EmergencySupport5GC information is present in the system information block type 1 message.