Patent ID: 8274982

Claim:
A method for packet data session release in ultra mobile broadband (UMB) access network, comprising the following steps: when releasing the packet data session, sending, by an access gateway (AGW), a proxy mobile IP (PMIP) registration revocation message to a data attachment point of the UMB access network; after receiving the PMIP registration revocation message, sending, by the data attachment point, a PMIP revocation ACK message to the AGW to confirm the reception of the PMIP registration revocation 1 message; sending, by the data attachment point, an IP tunnel notification message to a session reference network controller (SRNC) to notify the SRNC that the packet data session has been released; performing, by the SRNC and after receiving the IP tunnel notification message, sending an IP tunnel notification ACK message to the data attachment point to confirm that the SRNC has received the IP tunnel notification message, triggering a UMB session release, and sending a session release message to the route set members of the AT and the data attachment point; and after receiving the session release message, sending, by the route set members and the data attachment point respectively, a session release ACK message to the SRNC to confirm that the route set members and the data attachment point have received the session release message.