Patent ID: 7561548

Claim:
A method for handing over a mobile station from a wireless local area network system to a CDMA 2000 system, comprising: step 1: when the mobile station detects that a signal of the wireless local area network is fading or has disappeared, determining to hand over the mobile station from the wireless local area network to the CDMA 2000 system, the mobile performs step 2; step 2: initiating a call in the mobile station in the CDMA 2000 system, after a base station permits the mobile station to access, establishing R-P connection with a packet data service node by a packet control function node; step 3: after the packet data service node determines the mobile station is a handoff user, establishing a data transmission channel in the CDMA 2000 for the mobile station; and step 4: performing data transmission between the mobile station and the packet data service node via the packet control function node, and disconnecting, by the packet data service node, the R-P connection established between the packet data service node and a wireless access point gateway in wireless local area network system.