A method and a system for supporting rendezvous based instant group conferencing among mobile users allows a conference originator to initiate and setup instant group conferencing to a set of participants even when the participants may not be immediately available to commit to the conference call at...http://www.google.com.hk/patents/US20040001446?utm_source=gb-gplus-share專利 US20040001446 - Method and system for supporting rendezvous based instant group conferencing among mobile users
