Quality of Service Performance Evaluation of Next-Generation Network

Traditional networks have no longer a place among Internet service providers. The telecommunications industry is currently moving towards the trade of Internet services. Next Generation Networks (NGN) are a perfect match for clients' needs in terms of access to new services with better quality of service (QoS). However, with the diversity of QoS mechanisms and transport protocols and unparalleled openness of clients to the new multimedia services, the service provider must evaluate the performance of its architecture with each parameter cited to ensure that the QoS provided meets the clients' requirements. In this paper, we will measure and evaluate the impact various QoS mechanisms on the performances of transported applications under the Riverbed Modeler simulator. The traffic used for the simulations is Voice over IP (VoIP), File Transfer Protocol (FTP) and HTTP applications were used to stress the network. The evaluation criteria are on the jitter, the end-to-end delay, and the VoIP loss rate.