Evaluation of VoIP Quality over WiBro
- Resource Type
- Authors
- Dooyoung Lee; Sue Moon; Keon Jang; Mongnam Han; Youngseok Lee
- Source
- Lecture Notes in Computer Science ISBN: 9783540792314
PAM
- Subject
- Voice over IP
Handover
business.industry
Computer science
Mean opinion score
Quality of service
Orthogonal frequency-division multiple access
ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS
Telecommunications link
WiBro
Throughput
business
Computer network
- Language
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.