An E-Model Implementation for Speech Quality Evaluation in VoIP Systems
ISCC '05 Proceedings of the 10th IEEE Symposium on Computers and Communications
An integrated framework for enabling effective data collection and statistical analysis with ns-2
WNS2 '06 Proceeding from the 2006 workshop on ns-2: the IP network simulator
Ns2Voip++, an enhanced module for VoIP simulations
Proceedings of the 3rd International ICST Conference on Simulation Tools and Techniques
Combining SPIN with ns-2 for protocol Optimization
SPIN'10 Proceedings of the 17th international SPIN conference on Model checking software
Voice quality prediction models and their application in VoIP networks
IEEE Transactions on Multimedia
Perceptual QoS assessment technologies for VoIP
IEEE Communications Magazine
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This paper presents an improvement to an existing VoIP call quality model in the context of mobile networks, that works on-the-fly and deals with uncertainty. Subjective call quality evaluation with real people is expensive and hard to setup. Network engineers would benefit from automated means to approximate these subjective measures, such as the ITU-T E-model, in the development and planning phases. We have improved this call quality model to allow on-the-fly measurement while dealing with uncertainty inherent to the model, included additional corrections, and implemented it as a ns-2 module. Accurate and on-the-fly evaluation also enables further analysis and optimization tasks, such as those performed in previous work. We compare our version against the original definition of the E-model and present further results from our simulations.