Trunking communication method, device and system

The invention discloses a trunking communication method, a device and a system. According to the method, a multi-point service function entity receives a group call establishing request sent by a trunking control server; according to the received group call establishing request, the multi-point service function entity initiates a group call process through a mobile management entity to trigger establishment of multicast bearing; after accomplishing establishment of multicast bearing, the multi-point service function entity returns a group call establishment response to the trunking control server. Through the method, group communication business based on EPC can be realized.