Using Software Defined Networking for Call Admission Control and VoIP applications

Call Admission Control (CAC) is a mechanism that allows limiting the number of concurrent sessions established within a VoIP communication platform based on the SIP protocol. Such mechanism is not standardized, and it brings up practical difficulties to deploy that into traditional network environments where different networking devices from multiple vendors interact with each other. Software Defined Networking (SDN) is a model that decouples the control and forwarding logic from the network infrastructure making it programmable and it provides open interfaces to interact with.