Patent ID: 7822432

Claim:
A group communication system based on CDMA2000 high-rate packet data network, comprising a base station, a packet control function module, a packet data service node and an AAA (authentication, authorization, accounting) server, further comprising: multiple accessing terminals, for making or responding a service request of group talk; a group dispatching server, for providing centralized control of group talk service, implementing the whole group talk service procedure from group user authentication to transmission of voice service packets; and a group dispatching user side, being an accessing gateway of the group communication system, for providing signaling and service link between the base station and the group dispatching server; wherein said group dispatching server further includes: an authentication module, for authenticating the accessing terminal which makes the service request of group talk; an arbitration module, for arbitrating the start-calling priority between multiple groups that make the service request of group talk and the talking priority between the multiple accessing terminals in the group which implement the group talk; a calling establishing module, for sending group talk establishment to other users in the group allowed for the group talk, and requesting the base station to allocate aerial resource and finite-side resource for the accessing terminals that establish the talk; and a copying and distributing module, for copying the voice service packages from the base station and distributing the voice service packages to other accessing terminals in the group implementing the group talk through the allocated resources.