Handover method and mobile communication system for packet data service in a mobile communication network synchronous network and asynchronous network is mixed

摘要

In the mobile communication network and a synchronous network asynchronous network coexist, the present invention presents a handover method and a mobile communication system that allows the handover in the dormant state of the mobile communication terminal or the packet data services while using. (Packet Data Service Node) Because of the interconnected GGSN of the asynchronous network PDSN of the synchronous network and (Gateway GPRS Support Node), the mobile communication system of the present invention utilizes the packet data service in an asynchronous mobile communication system mobile communication terminal have if the move to the synchronous mobile communication system, and performs traffic setting the control signal for the packet data transmission in a synchronous mobile communication system at the request of the asynchronous mobile communication system, the synchronous mobile communication and mobile communication terminal reverse channel and forward direction is assigned Rarere between systems, after performing the call setup for the packet data service, Node B of the asynchronous mobile communication system releases the connection with the mobile communication terminal. In accordance with the present invention, there is an advantage that can perform handover without service disruption phenomena packet data services while using.