20080279118 | SYSTEM AND METHOD FOR PROVIDING SESSION INITIATION PROTOCOL BASED CONFERENCE SERVICE - A system for providing a session initiation protocol based conference service includes: a conference host terminal that produces requests to setup a call using identification information, to make a registration of participants to be invited to a conference session using a conference identifier, and to initiate the conference session using the conference identifier; a plurality of conference participant terminals as the participants that participate in the conference session; and a conference server having the identification information. The conference server issues the conference identifier to the conference session; stores therein the participant information; and sends to each of the conference participant terminals corresponding to the stored participant information a message to invite the conference participant terminal to the conference session, the message containing the conference identifier, thereby creating the conference session with conference participant terminals which have sent to the conference server acknowledgement messages. | 11-13-2008 |