Method for dividing session of push to talk over cellular session and system thereof

Step of the present invention is requested, the session division to the PoC server of the divided session object to merge request PoC client manages the session to which he belongs relates multiple PoC sessions under the environment of how session division (division session) between the PoC session; PoC server managing the session division request comprises a session division request to a PoC server managing the session destination partition; Further comprising: negotiating the session division request, the PoC server and the divided target session CF (Controlling PoC function) to manage a session to be divided between the PoC server; As the step of negotiation between the PoC servers is completed, when the charge of CF (controlling PoC function) to be divided session selection division target PoC session server sends updates to the modified media parameters to a PoC client of the divided session object; And the session division request, the PoC server is sending a notification (NOTIFY) of the split request indicating that the selection of a CF (controlling PoC function) of the divided session, the PoC client in the session division request. PTT, PoC, session, Multi-session, division, session division