Satisfying QoS Requirements in NGN Networks Using a Dynamic Adaptive Queuing Delay Control Method

The Next Generation Networks (NGN) are required to support the seamless delivery of voice, video and data with high quality. One of the most important key features of NGN is Quality of Service (QoS), which has been a focal point of NGN research, development and standardization. In this work, we propose and demonstrate an efficient NGN QoS control method, which guarantees the QoS requirements expressed in terms of per-service traffic flow authorized queuing delay. Multiple service levels are used in order to provide differentiated services and prioritize traffic requiring high-level QoS. The advantages of the proposed method are demonstrated through modeling of the QoS queuing delay parameters. Simulation results are generated to evaluate the performance of the proposed method in terms of supporting the QoS and improving the network scalability based on queuing delay control and adjustment.