Patent ID: 8059679

Claim:
A method, comprising: determining, by a source Mobility Management Network Element (MMNE), a version number of a General Radio Packet Service (GPRS) Tunneling Protocol (GTP) used between the source MMNE and a destination MMNE; transmitting, by the source MMNE, a Context Response message to the destination MMNE, wherein the Context Response message includes user information corresponding to the version number of the GTP used between the source MMNE and the destination MMNE; and wherein when a source Access Network (AN) is a higher version and a destination AN is a lower version, the method further comprises: notifying a Serving Gateway (S-GW) to delete bearer resource, by the source MMNE transmitting a Delete Bearer Request message to the Serving Gateway (S-GW) and the S-GW deleting the bearer resource used by a UE; wherein when the GTP version number is GTPV2, the user information corresponding to the version number of the GTP comprises both Packet Data Network Gateway (P-GW) information and Serving Gateway (S-GW) information.