Patent ID: 9277592
Filing Date: 2016-03-01
CPC Classification: H04L,H04M,H04W

Claim Text:
1. A method for a Bearer Binding and Event Report Function (BBERF) relocation comprising: after a first IP Connectivity Access Network (IP-CAN) session is established for a User Equipment (UE) in an Evolved Packet System (EPS) and a first gateway control session, a first Gx session, an S9 session and a first subsession of the S9 session that perform policy control on the first IP-CAN session are established, in a process of the BBERF relocation: establishing a second subsession of the S9 session between a visited Policy and Charging Rule Function (PCRF) and a home PCRF, and linking a second gateway control session established between a destination BBERF and the visited PCRF to the second subsession; if an IP-CAN session modification indication message sent by a Policy and Charging Execution Function (PCEF) is received, then the home PCRF linking the first Gx session that the IP-CAN session modification indication message requests to modify to the second subsession based on session identifier information contained in the IP-CAN session modification indication message; and if an IP-CAN session establishment indication message sent by the PCEF is received, then the home PCRF linking a second Gx session that the IP-CAN session establishment indication message requests to establish to the second subsession based on session identifier information contained in the IP-CAN session establishment indication message.