Patent ID: 8527634

Claim:
A method for creating an Internet Protocol Connectivity Access Network (IP-CAN) session, comprising: creating by a first Policy and Charging Enforcement Function (PCEF) entity, a first session with a Policy and Charging Rules Function (PCRF) entity, wherein the creating comprising: sending by the first PCEF entity, a session creation request that carries an Access Point Name (APN), a user ID of a user, and an IP-CAN bearer information to the PCRF entity; and receiving by the first PCEF entity, a session creation response that carries an IP-CAN session information from the PCRF entity; performing by the first PCEF entity, mobility registration with a second PCEF entity to make the second PCEF entity create a second session with the PCRF entity, wherein the performing comprising: sending by the first PCEF entity, a mobility registration request or a bearer creation request that carries the APN and the user ID to a second PCEF entity, to make the second PCEF entity allocate an IP address to the user and send a Policy and Charging Control (PCC) decision request that carries the IP address to the PCRF entity for formulating, by the PCRF entity, a PCC rule according to the APN, the user ID, the allocated IP address, the IP-CAN bearer information, and a stored user subscription profile; and receiving by the first PCEF entity, session information from the PCRF entity.