Patent ID: 7843885

Claim:
A method for storing dormant state information of mobile stations in a dormant state where no packet data is exchanged with an external packet network, in a centralized database connected to a packet data switch, and updating the dormant state information stored in the centralized database in association with the mobile station when the mobile station in the dormant state moves to a target Base Station Controller (BSC) adjacent to a source BSC in a wireless packet data system including a Packet Data Switch Node (PDSN) for connecting the external packet network to the mobile stations through the packet data switch and the source BSC connected to the packet data switch, the method comprising the steps of: receiving, by the target BSC, from the mobile station a location registration message when the mobile station moves to the target BSC adjacent to the source BSC; upon receipt of the location registration message, transmitting by the target BSC, to the centralized database a location update message for updating a location of the mobile station, and transmitting by the source BSC, to the target BSC where the mobile station is located a paging request message for requesting paging of the mobile station; upon receipt of the location update message, updating by the centralized database, the dormant state information for the mobile station and transmitting, by the source BSC, to the target BSC, a packet call connection message requesting connection of the packet data so as to connect the target BSC to the source BSC; and transmitting by the centralized database to the target BSC a location update result message indicating complete update of the dormant state information.