Method and system for providing PTT to conference

摘要

A method for providing push-to-talk (PTT) so as to conference between a plurality of user equipments (UEs) serving as clients in a mobile communication network including a PTT over cellular (PoC) server, a conference server, and a mixer for mixing for the conference. The method comprises performing a request procedure for switching over to the conference during a PoC session between the UEs; performing a conference client invitation or participation procedure for opening a conference session through the conference server; and performing a procedure for releasing the conference session between the PoC server and the UEs. The method can switch over to a conference service during a PTT service without newly initializing the conference service after completing an old PoC session, and can also switch over to bidirectional communication between all or some of the participants during a PoC session which is using unidirectional communications.