METHOD AND SYSTEM FOR ESTABLISHING A GROUP SESSION IN PoC SYSTEM
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The present invention relates to a method for obtaining a reception side PoC terminal and the inviter information of PoC if the pre-session (Pre-established Session) and the auto-answer mode is set between the server, the receiving PoC user and the ad-hoc (ad-hoc) groups in PoC system and preferences according to provide the technology to selectively establish a PoC session. In particular, the present invention is to effectively utilize as a method of communicating information of other users that are expected to participate in the group call by signaling in User Plane and access rules and service settings to support it, a timer and the receiving-side SIP session set up the proposed changes to the response measures set between the PoC client and the server. Pre-session, answering mode, an ad hoc group, the petitioner information, User Plane