Patent ID: 8446847

Claim:
A system for implementing a special call service, comprising: a special call service initiating entity, adapted to set a service type identifier identifying a service type of the special call service in a session establishment request message, and send the session establishment request message to a special call service processing device; and the special call service processing device, adapted to receive the session establishment request message; and implement the special call service according to the service type identified by the service type identifier; wherein the service type identifier identifies a group call service, and wherein the special call service processing device is adapted to: query a communication status of a called party; when the communication status of the called party is “Busy”, transfer the called party to a group call session through a media resource server; or when the communication status of the called party is “Idle”, add the called party to a group call session through a media resource server; wherein the special call service processing device further comprises: a determining unit adapted to determine the service type identified by the service type identifier in the session establishment request message; a storage unit adapted to store service processing logic information comprising the service type and a service processing logic corresponding to the service type; and wherein the special call service processing device is adapted to implement the special call service in accordance with the service type determined by the determining unit and the service processing logic information stored in the storage unit.