METHOD AND APPARATUS FOR CALLING SIP BASE

摘要

PROBLEM TO BE SOLVED: To provide a position update system for updating the position of a mobile terminal.;SOLUTION: The position update system for updating the position of the mobile terminal comprises a calling area, where the mobile terminal exists; a domain area, where the mobile terminal exists; and a calling position update server for communicating with the mobile terminal and updating the position of the mobile terminal and the domain area.;COPYRIGHT: (C)2004,JPO&NCIPI