A communication system for establishing communication between intelligent radio terminal and a server

摘要

The present invention is applied to the case that in a communication system establishing communication between a radio intelligent terminal (1) and a server (6) via gateways (4, 5), it is necessary to exchange from the gateway to be used originally (eg. 4) to another gateway (eg. 5) for various reasons. Firstly, it is arranged in this invention that at receiving a gateway exchange instruction, an information notifying means notifies a radio intelligent terminal (1) of the generation of gateway exchange. In the case of only notifying the gateway exchange, the above information in addition to the exchange notice contains information necessary for communication between the radio intelligent terminal (1) and the server (6) via exchange-destination gateway (eg. 5), for example, the exchange-destination gateway address. A range of further means and methods for efficiently performing gateway exchange in the communication system are also disclosed.