Method and system for servicing full duplex direct call in poc(ptt over cellular)

The invention in one PoC (PTT over Cellular) service operating in the common half-duplex mode: provides a method and system that can operate in full duplex mode at the time of the call between the first user wants directly. The present invention to achieve the above object, in the full duplex mode, for conversion to full-duplex mode for example, a typical half-duplex call to send an INVITE message to set up the originating terminal to the requesting full-duplex mode at the time of the PoC session set to the PoC server includes an embodiment for transmitting the request message to the PoC server, the PoC server has the call in full-duplex mode between without performing the talk burst control (floor control), mounting / calling user control upon receiving the request message, the full-duplex mode, . PTT, PoC, RTCP, Full Duplex, Half Duplex