Evaluation of VoIP Quality over WiBro
نویسندگان
چکیده
In this work, we have conducted experiments to evaluate QoS of VoIP applications over the WiBro network. In order to capture the baseline performance of the WiBro network we measure and analyze the characteristics of delay and throughput under stationary and mobile scenarios. Then we evaluate QoS of VoIP applications using the E–Model of ITU–T G.107. Our measurements show that the achievable maximum throughputs are 5.3 Mbps in downlink and 2 Mbps in uplink. VoIP quality is better than or at least as good as toll quality despite user mobility exceeding the protected limit of WiBro mobility support. Using RAS and sector identification information, we show that the handoff is correlated with throughput and quality degradation.
منابع مشابه
A Measurement Study of VoIP over WiBro Networks
WiBro (Wireless Broadband) network, which incorporates the IEEE 802.16e standards for providing portable Internet service, is being deployed in South Korea. WiBro network has strengths in providing better mobility support compared with WLANs (Wireless Local Area Networks) and a higher transmission rate than conventional circuit-based cellular networks. With these advantages, WiBro networks are ...
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