Evaluation of VoIP Quality over WiBro

  • Mongnam Han
  • Youngseok Lee
  • Sue Moon
  • Keon Jang
  • Dooyoung Lee
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4979)

Abstract

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.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Mongnam Han
    • 1
  • Youngseok Lee
    • 2
  • Sue Moon
    • 1
  • Keon Jang
    • 1
  • Dooyoung Lee
    • 1
  1. 1.Computer Science DepartmentKAIST 
  2. 2.School of Computer Science & EngineeringChungnam National University 

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