| 摘要 |
PURPOSE: A communications system managing server, a radio server, a mobile managing server, and an information managing server are provided to greatly suppress increased load on a network even when a mobile terminal or mobile radio unit travels through various networks. CONSTITUTION: A plurality of networks(X,Y) connected to a global network(100) have at least one radio server(RSX1-RSX3,RSY1-RSY3) and a radio base station connected to the one radio server(RSX1-RSX3,RSY1-RSY3) to communicate with one mobile radio unit(ML001) connected to a terminal or a host. When one mobile radio unit(ML001) or the host connected to one network is transmitting data to another mobile radio unit connected to another network, and if a destination address resolution is required, a communications system managing server(10) responds to a destination address resolution request transmitted from the one mobile radio unit(ML001) or the host, and transmits an IP address allocated to the other mobile radio unit by the currently connected wireless server to the one mobile radio unit(ML001) or the host.
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