Patent ID: 11902393
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The first P-CSCF node of claim 10, wherein the processing circuitry is further configured to cause the first P-CSCF node to:
communicate with the second P-CSCF node, via a P-CSCF-to-P-CSCF interface, to initiate a context transfer to the second P-CSCF node; and/or
wherein the processing circuitry is further configured to cause the first P-CSCF node to communicate with the second P-CSCF node, via a P-CSCF-to-P-CSCF interface, by being configured to cause the first P-CSCF node to at least one of:
request that the second P-CSCF node reserve at least one Internet Protocol, IP, address in the second AGW for the second user plane and the local AS;
provide, to the second P-CSCF node, addresses associated with the second user plane and the local AS to allow the second P-CSCF node to set-up the second AGW for the second user plane and the local AS for the IMS PDU session for the UE;
receive, from the second P-CSCF node, the addresses reserved in the second AGW for the second user plane and the local AS to use; and
subscribe to the AMF to be notified when the location of the UE is outside of a coverage area of the second AGW.