The floor control method in the system and PoC communication system

摘要

A system and method are realized in which it is possible to control right-to-speak according to a setting of an organizer, in PoC communication. In a group management server, mobile telephones forming a group that performs PoC communication are registered; a presence server manages, for each mobile telephone, speaking permission and denial states of each mobile telephone in the PoC communication shown in notification from the mobile telephones; the PoC server performs control of PoC communication between the mobile telephones that form the group in the group management server, in accordance with a request to perform PoC communication from a mobile telephone; when a request for a right-to-speak is received from a mobile telephone performing the PoC communication, speaking permission and denial states of each mobile telephone managed by the presence server are referred to; and according to content thereof, speaking for the mobile telephone that has made the request for the right-to-speak is permitted or denied.