Method for merging session of Multiple Push To Talk over Cellular session and system thereof

Step of the present invention request the session merging with a merged session to a PoC server for managing the PoC client session connection request to which he belongs relates to a combined session (session merging) method between a PoC session under the environment multiple PoC session; Further comprising: a session merge request to a PoC server managing the PoC server managing the merged session to the session connection request; Further comprising: negotiating a CF (Controlling PoC function) to manage a session to be coupled between the server and the PoC session connection request merged session the PoC server; Sending an update to the media parameters, when the entire CF (controlling PoC function) has been selected for the session to be combined merged session to a PoC server is changed PoC client of the merged session as the negotiation between the PoC servers completed; And wherein the session merge request PoC server sending a notification (NOTIFY) of the connection request indicating that the selection of the full CF (controlling PoC function) to the PoC client in the session merge request. PTT, PoC, session, Multi-session, merging, combining session