PUSH SERVER SYSTEM FOR RESOLVING A NAT TRAVERSAL AND CONROLLING METHOD THEREFOR

摘要

PURPOSE: A push server system for preventing a NAT(Network Address Translation) traversal and a control method thereof are provided to easily receive a PUSH message by maintaining NAT binding of a mobile communication terminal and a PUSH server. CONSTITUTION: Terminal equipment(1A-1N) periodically transmits a message for location registration information to higher level equipment through a session process. A PUSH server(2) always obtains a transmission path through the location registration information of the terminal equipment. The PUSH server transmits a PUSH message to corresponding terminal equipment using the obtained equipment transmission path. The PUSH server comprises a registrar module(3) transmitting a connection request message through the obtained transmission path in the state that the location registration message is received and a PUSH service module(4) transmitting the PUSH message. NAT equipment(5) changes a source IP address of the terminal equipment into a public IP address. A firewall(6) blocks service data using a different port. [Reference numerals] (7) Mobile radio communication network