Communication device, communication system and programme

Abstract

Provided is a communication device in which network resources in data communications, particularly, resources (radio channels) for radio communications are effectively utilized and the procedure of re-connection watched from an application or user side is not required on a terminal side even in the case of disconnection. Connection information is stored with an IP address applied from a server when a dial-up IP connection is performed for the first time and when a data communication is stopped for a prescribed time, the connection is cut off. When the communication procedure based on the IP address is started again, the dial-up IP connection is performed again to be allocated with a new IP address. After the re-connection, as an address of the terminal, the IP address is set to a packet addressed to the terminal and the new IP address is set to a packet addressed to the server.

Description

technical field [0001] The invention relates to a communication device, in particular to a data communication modem card. Background technique [0002] In conventional data communication via wireless communication lines such as personal handy phone systems or public telephone lines, the connection between the terminal side, the communication line network, and the server side is always maintained even when the transmission data is not being received. [0003] In addition, in dial-up IP connection (PPP (Point to point protocol: Point-to-point protocol) connection), an IP address is assigned to a connected terminal from the server side, and subsequent communications are performed based on this IP address. And, this IP address is released when disconnecting, and a new IP address is assigned when reconnecting. Therefore, the application program (Web browser, etc.) on the terminal side performs communication processing from the IP address that was first connected. If the call is ...

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, in a wireless communication line such as a personal handheld telephone system, if the terminal side, the base station, and the server side are constantly connected, the use efficiency of the wireless channel will be reduced, and the use of network resources including public telephone lines will be reduced. waste on

[0005] In addition, if the dial-up IP connection is disconnected, the procedure for reconnection must be performed on the application side again, so the user needs to bear additional costs.

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