Patent ID: 8578035

Claim:
A method for relocating a Serving Gateway, SGW, with which a user equipment, UE, is associated in a UE-connected mode, the method being performed in a Mobility Management Entity, MME, and comprising the steps of: a) triggering, from the MME, a relocation of a source SGW to a target SGW by sending a Create Session Request message to the target SGW; b) receiving, from the target SGW, a Create Session Response message including General Packet Radio Service, GPRS, Tunnelling Protocol, GTP, endpoints of the target SGW; c) updating, from the MME to an Evolved NodeB, eNB, an Internet Protocol, IP, address and a Tunnel Endpoint IDentifier, TEID, of the target SGW while the UE remains in the UE-connected mode; and d) sending, from the MME to the source SGW, a Delete Session Request to delete a session.