Perceived QoS assessment for Voip networks

As the Internet evolves into a ubiquitous communications, VoIP network becomes more important and popular. It will be expected to meet the quality standards for VoIP networks. The aim of this paper is to undertake a fundamental investigation to quantify the impact of network impairment and speech relates parameters on perceived QoS in VoIP networks. Our contribution is threefold. First, a new VoIP simulation platform is established. The network simulation software is WANem, the voice communication protocol is implemented by OpenPhone. Secondly, we analyze the factors that affect the perceive QoS of VoIP networks. Thirdly, we use the newest NPESQ (New Perceptual Evaluation of Speech Quality) algorithm to assess the perceived QoS value under different IP impairment parameters for VoIP networks.