DATA COMMUNICATION TERMINAL, PROXY DEVICE, DATA COMMUNICATION SYSTEM, AND DATA COMMUNICATION METHOD

摘要

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 (2) includes a control protocol processing section (203) which transmits an address request to a proxy device (5) to acquire global address information using the HTTP that is preset so as to be used by the mobile communication terminal (2) and the proxy device (5), a TCP/UDP data transmitter/receiver section (205) which establishes a connection with the proxy device (5), and an application section (201) which transmits data via a communication path between the proxy device (5) and a server device (6) using the global address information as the transmitter address. The control protocol processing section (203) transmits information relating to the connection destination of the server device (6) to the proxy device (5) using the HTTP, and requests a connection between the proxy device (5) and the server device (6) using a predetermined transport layer protocol.