Patent ID: 8626884

Claim:
A method for establishing data connections on a mobile network, comprising: establishing a data channel between a user equipment (UE) and a packet data network (PDN) gateway (GW); wherein during the establishing the data channel, the UE does not request an IP address allocation; establishing, by a policy control entity, a policy control session with the PDN GW according to a data channel ID provided by the PDN GW, wherein the policy control session is used to implement policy control on the data channel, and the data channel ID is used to identify the established data channel between the UE and the PDN GW; after the data channel is established, allocating, by the PDN GW, an Internet Protocol (IP) address for the UE to access the PDN according to an address allocation request sent from the UE; sending, by the PDN GW, a policy control session update request carrying the IP address to the policy control entity; and updating, by the policy control entity, a policy control rule corresponding to the policy control session with the PDN GW according to the IP address carried in the policy control session update request.