IMS Based PoC Service Deployment

The IP Multimedia Subsystem (IMS) has brought us feasibilities by separating control functions from bearer and services. Multi-access technology enables us connecting the IMS core by kinds of network such as wireless, wire-line network and Internet. By IMS Service Delivery Platform (SDP) richness of services have been developed and deployed into realization through its common protocols and interfaces. Push-to-talk over Cellular (PoC) as the outstanding half-duplex Voice over IP (VoIP) application service enables traditional walkie-talkie service over mobile network.. In this paper we will focus on the advantage of PoC service and PoC architecture firstly, and then describes the session flows of PoC service and its simple simulation. At last we make some conclusions.