Patent ID: 11877224
Assignee: NOKIA TECHNOLOGIES OY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The apparatus as claimed in claim 1, wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to perform:
determining the service type of the service request message, and for, when the service type is the emergency service fallback type:
attempting to select one of: a new radio cell connected to a 5G core network; an evolved universal terrestrial radio access cell connected to the 5G core network; and
evolved universal terrestrial radio access cell connected to an evolved packet node further based on at least one of:
an emergency service support indicator for 3GPP access;
a radio access technology of the apparatus' current cell;
a capability to access the 5G core network via evolved universal terrestrial radio access;
support for S1 mode;
availability of a suitable new radio cell connected to the 5G core network, evolved universal terrestrial radio access cell connected to the 5G core network, or evolved universal terrestrial radio access cell connected to an evolved packet core; and
an emergency service fallback indicator for 3GPP access.