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Performance Evaluation of the VoIP Services of the Cognitive Radio System, Based on DTMC
Ummy Habiba, Md. Imdadul Islam and M. R. Amin
Page: 119~131, Vol. 10, No.1, 2014
10.3745/JIPS.2014.10.1.119
Keywords: Cognitive Radio, VoIP, DTMC, Cross-layer Analytical Model, M/G/1(m) Traffic, IEEE 802.16e/m
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In recent literature on traffic scheduling, the combination of the twodimensional discrete-time Markov chain (DTMC) and the Markov modulated Poisson process (MMPP) is used to analyze the capacity of VoIP traffic in the cognitive radio system. The performance of the cognitive radio system solely depends on the accuracy of spectrum sensing techniques, the minimization of false alarms, and the scheduling of traffic channels. In this paper, we only emphasize the scheduling of traffic channels (i.e., traffic handling techniques for the primary user [PU] and the secondary user [SU]). We consider the following three different traffic models: the cross-layer analytical model, M/G/1(m) traffic, and the IEEE 802.16e/m scheduling approach to evaluate the performance of the VoIP services of the cognitive radio system from the context of blocking probability and throughput.