A practical method for estimating performance metrics of call admission control schemes in wireless mobile networks

TitleA practical method for estimating performance metrics of call admission control schemes in wireless mobile networks
Publication TypeConference Paper
Year of Publication2005
AuthorsYavuz, E. A., and V. C. M. Leung
Conference NameWireless Communications and Networking Conference, 2005 IEEE
Pagination1254 - 1259 Vol. 2
Date Publishedmar.
Keywords1D Markov chain models, CAC performance metrics, call admission control, channel holding time, computational complexity, handoff blocking probability, Markov processes, mobile radio, new call blocking probability, quality of service, telecommunication congestion control, wireless mobile networks
Abstract

Providing the desired call blocking probability (CBP) to not only new but also existing calls has been a challenge for wireless mobile network service providers. To satisfy different requirements for new and handoff CBP, several call admission control (CAC) schemes have been proposed in the literature. Exact analysis of these schemes using 2D Markov chains is computationally intensive. Therefore, computationally efficient methods to analyze these systems using 1D Markov chain models have been considered. The "traditional" approach assumes that channel holding time for new and handoff calls have equal mean values. While the "normalized" approach relaxes this assumption, it is accurate only for the new call bounding CAC scheme. In this paper, we reevaluate the analytical methods for CBP probabilities for several widely known CAC schemes under more general assumptions by providing an easy to implement method. The numerical results show that when the average values of channel holding times for new and handoff calls are different the proposed approach gives more accurate results when compared with the traditional and normalized methods based on 1D Markov chain modeling, while keeping the computational complexity low.

URLhttp://dx.doi.org/10.1109/WCNC.2005.1424689
DOI10.1109/WCNC.2005.1424689

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