Call admission control method for the SIP base Service interworking Control System

摘要

A call admission control method for interworking call between SIP base subscriber network before session setup is provided to confirm network transmission resource necessary for interworking call between SIP base subscriber networks by mounting a call admission control device. A call admission controller outputs an occupation request message about the resources demanded to a core network border gateway(S55). The core network border gateway assigns the optimal transmission path for assigning the resources(S56). The core network border gateway occupies the resources through the SIP base business core network system B connected to network and transmission line(S57). The core network border gateway outputs the resource occupation notifying message to the call admission control unit(S58).