Patent ID: 8184645

Claim:
A communication system, comprising: a subscriber network having a base station configured to wirelessly communicate with mobile terminals; a synchronized network; a packet communication network; an adapter device which is installed on the subscriber network; and a gateway device which is connected to the base station via the adapter device and a I′ interface; wherein the adapter comprises: an Internet Protocol processor configured to bring the I′ interface from the base station into an Internet Protocol to connect the I′ interface to the gateway device; an optical activation unit configured to connect the base station and the gateway device with each other via an optical fiber and optically activate the I′ interface which is brought into the Internet Protocol; and a clock processing unit configured to apply clock transmission processing to packets from the I′ interface which is brought into the Internet Protocol in an upper layer to transmit the packets to the I′ interface from the base station; the gateway device comprises: a protocol converter configured to mutually convert communication protocols among the subscriber network, the synchronized network and the packet communication network to mutually connect these networks; a synchronized network terminating interface configured to terminate the synchronized network to generate in-device signals; a packet communication network terminating interface configured to terminate the packet communication network to generate the in-device signals; a subscriber network terminating interface configured to terminate the I′ interface which is optically activated to generate the in-device signals; and an exchange unit configured to exchange in-device signals each generated from the synchronized network terminating interface, the packet communication network terminating interface, and the subscriber network terminating interface.