Performance Optimization of VoIP using an Overlay Network
作者： Dan Rubenstein , Rauf Izmailov , Samrat Ganguly , Raj Kumar Rajendran
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摘要: Voice traffic on the Internet (VoIP) is poised to grow rapidly but not engineered for such delay-sensitive applications. We show how end-user quality of VoIP calls can be improved by rerouting them in an intermediate overlay network and thought use various path-diversity error-coding techniques. introduce our (OverPhone) that tuned optimize provide experimental results its implementation PlanetLab testbed. re-routing through OverPhone improves more than a third paths significant amounts when using G.711 codec. believe this benefit extends other well known proprietary codecs as well. also investigated benefits trade-offs techniques paritycoding. found useful sustaining throughput at high loads, parity-codes used trade-off bandwidth path-quality. 1
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