Method and apparatus for providing simultaneous multi ptt over cellular multimedia service

The invention relates to a simultaneous multiple PoC multimedia service providing method and system, OMA PoC (PTT over Cellular) to the PoC client, to perform a multimedia communication service it can be displayed been provided with a plurality of media streams at the same time, also provides at the same time which allows for efficient transfer media through the media adaptation for adjusting the respective capacitances of the media stream.