| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication terminal, a server terminal, and a bidirectional communication system for communicating surely, simply, and safely when two or more communication terminals, to which a dynamically shifting IP address is given, communicate bidirectionally. <P>SOLUTION: The bidirectional communication terminal includes: a communication terminal having a transmission means for transmitting an address registration message as a message, which contains the own ID number and the own IP address of the communication terminal and does not contain the ID number of the transmission destination terminal, to a server terminal when the own IP address of the communication terminal is changed; and a server terminal having a registering means for registering the ID number of the transmission source communication terminal and the IP address of the transmission source communication terminal included in the received message into a correlation table when the message received from the communication terminal contains the ID number of the transmission source communication terminal and the IP address of the transmission source communication terminal and does not contain the ID number of the transmission destination terminal, and a message discarding means for discarding the message after the registration. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
