The method for the mobile terminal hand-off between the cdma system and the wlan

摘要

A method for handing over a mobile station from wireless local area network to CDMA 20001X system, comprises the following steps of: when a mobile station detects that a signal of wireless local area network is fading, determining to hand over to CDMA 20001X system; first, initiating a call in CDMA 2000 1X system; after a base station permits the terminal to access, establishing, by a packet control function node, a R-P connection with a packet data service node; establishing data transmission channel to CDMA 20001X system for the terminal by the packet data service node; performing data transmission between the terminal 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 wireless access point gateway in the wireless local area network system. The present invention uses the method of first establishing a new link and then disconnecting original link, in which the packet data service node does not change. The method realizes that the terminal can perform seamless handoff between CDMA 20001X system and wireless local area network, and can maintain data transmission uninterrupted.