Traffic Analysis for Voice in Wireless IP Networks

In this paper we provide an extensive analysis of voice service in wireless IP networks. Voice traffic is serviced with priority over the rest of the traffic. Hence, we concentrate on the voice traffic in the analysis. We model the packetized voice traffic with Markov Modulated Poisson Process (MMPP), and we propose an analytical framework for its analysis in wireless networks. Also, we created a simulator in Matlab, with capability for QoS analysis in different network scenarios, considering user call intensity, voice-encoding rate, link capacity and buffer sizes. The observed QoS parameters are packet loss and delay. Voice traffic is very sensitive to delay, while some low losses may be tolerated. We present overwhelming QoS analysis of IP telephony traffic at different network setups and give a concept for dimensioning wireless links for IP telephony under given constraints on the QoS parameters. Key-Words: Wireless, IP, Quality of Service, Traffic, Voice