Method and apparatus for creating IP-CAN session

A method for creating an Internet Protocol Connectivity Access Network (IP-CAN) session, comprising:

• accepting by a second Policy and Charging Enforcement Function (PCEF) entity, mobility registration from a first PCEF entity that has created a first session with a Policy and Charging Rules Function (PCRF) entity, wherein the second PCEF entity receiving a mobility registration request or a bearer creation request that carries an APN and a user ID of a user from the first PCEF entity;
• allocating by the second PCEF entity, an IP address to the user;
• sending by the second PCEF entity, a mobility registration response or a bearer creation response that carries the IP address to the first PCEF entity;
• creating by the second PCEF entity, a second session with the PCRF entity;
• and
• receiving by the second PCEF entity, an IP-CAN session information and PCC rules from the PCRF entity.

A non-transitory computer readable storage medium storing a set of instructions for creating an Internet Protocol Connectivity Access Network (IP-CAN) session, the set of instructions to direct a processor in a network entity to perform:

• accepting mobility registration from a first Policy and Charging Enforcement Function (PCEF) entity that has created a first session with a Policy and Charging Rules Function (PCRF) entity, wherein the accepting comprising:
• receiving a mobility registration request or a bearer creation request that carries an Access Point Name (APN) and a user ID from the First PCEF entity;
• allocating an IP address to the user;
• sending a mobility registration response or a bearer creation response that carries the IP address to the First PCEF entity;
• creating a second session with the PCRF entity;
• and
• receiving an IP-CAN session information and PCC rules from the PCRF entity.

A method for creating an Internet Protocol Connectivity Access Network (IP-CAN) session, comprising:

• sending by a first Policy and Charging Enforcement Function (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 a Policy and Charging Rules Function (PCRF) entity;
• and
• receiving by the first PCEF entity, a session creation response that carries an IP-CAN session information from the PCRF;
• 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.

A method for creating an Internet Protocol Connectivity Access Network (IP-CAN) session, comprising:

• receiving by a second Policy and Charging Enforcement Function (PCEF) entity, a mobility registration request or a bearer creation request that carries an APN and a user ID of a user from a first PCEF entity that has created a first session with a Policy and Charging Rules Function (PCRF) entity;
• allocating by the second PCEF entity, an IP address to the user;
• sending by the second PCEF entity, a mobility registration response or a bearer creation response that carries the IP address to the first PCEF entity;
• creating by the second PCEF entity, a second session with the PCRF entity;
• and
• receiving by the second PCEF entity, an IP-CAN session information and PCC rules from the PCRF entity.

A non-transitory computer readable storage medium storing a set of instructions for creating an Internet Protocol Connectivity Access Network (IP-CAN) session, the set of instructions to direct a processor in a network entity to perform:

• receiving a mobility registration request or a bearer creation request that carries an Access Point Name (APN) and a user ID from a First PCEF entity that has created a first session with a Policy and Charging Rules Function (PCRF) entity;
• allocating an IP address to the user;
• sending a mobility registration response or a bearer creation response that carries the IP address to the First PCEF entity;
• creating a second session with the PCRF entity;
• and
• receiving an IP-CAN session information and PCC rules from the PCRF entity.