Ntt Docomo, Inc.

Noriko Mizuguchi

Masayuki Tsuda

Makoto Oku

A technique for easily realizing data communication without limiting the application layer protocol during data communication while maintaining the proxy function. A mobile communication terminal () includes a control protocol processing section () which transmits an address request to a proxy device () to acquire global address information using the HTTP that is preset so as to be used by the mobile communication terminal () and the proxy device (), a TCP/UDP data transmitter/receiver section () which establishes a connection with the proxy device (), and an application section () which transmits data via a communication path between the proxy device () and a server device () using the global address information as the transmitter address. The control protocol processing section () transmits information relating to the connection destination of the server device () to the proxy device () using the HTTP, and requests a connection between the proxy device () and the server device () using a predetermined transport layer protocol.

Data communication terminal, proxy device, data communication system, and data communication method

An object of the invention is to provide a charging processing device and a charging processing method capable of performing an appropriate charging process even when a connectionless protocol, such as UDP, is used. Gateway unitsandtransmit data transmitted between a mobile apparatusand a serverto the mobile apparatusor the serveras a transmission destination, and a charging processing unitperforms a charging process according to the amount of data transmitted by the gateway unitsand. A detecting unitdetects whether response data is transmitted from the transmission destination. When the timer value of the time for which communication is not performed is more than a predetermined time and the detecting unitdoes not detect the response data from the transmission destination, the control unitmay control the gateway unitorto stop the transmission process and control the charging processing unitto stop the charging process.

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Yokosuka, Japan

Noriko Mizuguchi