Patent ID: 8195214
Filing Date: 2012-06-05
Classification: H04L,H04W

Abstract:
1. A PoC (Push-to-talk Over Cellular) server which controls a floor in a PoC communication, the PoC server comprising: setting means for setting a floor idle state in the PoC communication to all terminals that will participate in the PoC communication, after a session establishing process necessary for the PoC communication is performed and before the session starts; floor release-notification means for notifying all the terminals that will participate in the PoC communication of a signal indicating that the floor is released; and advance-release-notification means for notifying a terminal which has acquired a floor for a predetermined time of at least one of an advance-release-notification, a remaining time of the floor, and a time up to a warning operation for advance-release-notification before the floor is released; wherein the PoC communication starts with the floor being released.