Achieving a QoS Target in NGN Networks via an Efficient Admission Control Strategy

Satisfying the Quality of Service (QoS) requirements is one of the main objectives in the design and implementation of IP-based Next Generation Networks (NGN). This paper formalizes an efficient NGN resource-based call admission control (CAC) method which guarantees the QoS requirements expressed in terms of per-service traffic flow throughput, latency, jitter, loss and authorized waiting delay. The proposed method delivers high quality session-based services compliant with the available capacity over an NGN network based IP/MPLS transport infrastructure. The effects of the proposed method on the QoS provision are demonstrated through modeling of the main QoS parameters. Numerical simulations, which illustrate the proposed method benefits in terms of QoS guarantees and transport network scalability, are also presented.