| 20110173332 | METHOD AND SYSTEM FOR IMPLEMENTING POLICY AND CHARGING CONTROL IN MULTI-PDN SCENARIO - A method for implementing Policy and Charging Control (PCC) in a multi-Packet Data Network (PDN) scenario is disclosed. The method includes: a Visited Policy Control and Charging Rules Function (VPCRF) receives PCC rules and the associated S9 sub-session information from a Home Policy Control and Charging Rules Function (HPCRF), and sends the PCC rules according to the associated S9 sub-session information. The S9 session message carries associated S9 sub-session information, and therefore, in a multi-PDN scenario, the S9 session can distinguish and handle creation, modification and deletion of the Internet Protocol Connectivity Access Network (IP-CAN) session and the gateway control session, and the VPCRF can understand the information delivered by the HPCRF, and send the information to the correct Policy and Charging Enforcement Function (PCEF) or Bearer Binding and Event Reporting Function (BBERF) for enforcement; moreover, the VPCRF can report the PDN connection release information to the HPCRF, and the HPCRF releases the corresponding PDN connection, thus avoiding ineffective occupation of resources and ensuring correct policies. | 07-14-2011 |
