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Analysis and Modeling of QoS Parameters in VoIP Traffic
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Author(s): Homero Toral-Cruz (University of Quintana Roo, Mexico), Deni Torres-Román (Center of Research and Advanced Studies, Mexico)and Leopoldo Estrada-Vargas (Center of Research and Advanced Studies, Mexico)
Copyright: 2012
Pages: 22
Source title:
Advancements in Distributed Computing and Internet Technologies: Trends and Issues
Source Author(s)/Editor(s): Al-Sakib Khan Pathan (International Islamic University Malaysia (IIUM), Malaysia), Mukaddim Pathan (Commonwealth Scientific and Industrial Research Organization (CSIRO), Australia)and Hae Young Lee (Electronics and Telecommunications Research Institut (ETRI), South Korea)
DOI: 10.4018/978-1-61350-110-8.ch001
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Abstract
Our studies have revealed that VoIP jitter can be modeled by self-similar processes, and through a decomposition based on Haar wavelet it is shown a possible reason of the presence of long range dependence (LRD) in VoIP jitter. On the other hand, we used a description of VoIP packet loss based on microscopic and macroscopic packet loss behaviors, where these behaviors can be modeled by 2-state and 4-state Markov chains, respectively. Besides, the distributions of the number of consecutive received and lost packets (namely gap and burst, respectively) are modeled from the transition probabilities of 2-state and 4-state Markov chains. Based on the above mentioned description, we presented a methodology for simulating packet loss and proposed a new model that allows to relate the Hurst parameter (H) with the packet loss rate (PLR). These models can be used by other researchers as input to problems related to the design of VoIP applications, performance evaluation of IP networks, and the implementation of QoS mechanisms on convergent networks.
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