METHOD AND SYSTEM FOR PROVIDING EXTENDED COMMUNICATION CAPABILITY TO MOBILE UNIT ON VIRTUAL PRIVATE NETWORK

摘要

PROBLEM TO BE SOLVED: To provide a method and a system that can provide an extended communication capability to a mobile unit on a virtual private network(VPN). SOLUTION: A service communication system has a cellular phone communication interface and a GPS system for each mobile vehicle (25) to set up a telephone communication event with a cellular base station (17). The base station 17 bridges an event between a cellular protocol and a public exchange telephone service protocol that are sent and broadcast from the vehicle 25. A specific network level routing system (63) is connected to the base station 17 though a 1st telephone communication relay channel, can receive a GPS position from the telephone communication event, is connected to service centers (71, 73) through other relay channels and decides the destination of each telephone communication event with the service centers depending on the extracted GPS position.