SYSTEM OF INTERACTIVE COMMUNICATION USING PRESENCE TECHNOLOGY, AND METHOD AND PROGRAM THEREOF

PROBLEM TO BE SOLVED: To provide a system and a method for establishing interactive communication only with a necessary user. SOLUTION: Computer terminals 10A and 10B are respectively provided with contact list storage means 105A and 105B for storing a contact list in which a registered user is written; presence information control means 102A and 102B for transferring a request related with registration or deletion of the user on a contact list with the other computer terminal; contact list management means 104A and 104B for transferring the request related with the registration or deletion of the user on the contact list to the other computer terminal, and for completing the registration or deletion of the user on the contact list after receiving a response from the other computer terminal to the request; and communication control means 103A and 103B for disclosing the presence information showing the existence of a user only with a user registered in the contact list and performing interactive communication. COPYRIGHT: (C)2009,JPO&INPIT