A practical method for estimating performance metrics of call admission control schemes in wireless mobile networks
2005 (English)In: 2005 IEEE Wireless Communications and Networking Conference, Vols 1-4: WCNC 2005: BROADBAND WIRELESS FOR THE MASSES READY FOR TAKE-OFF, 2005, Vol. 2, 1254-1259 p.Conference paper (Refereed)
Providing the desired call blocking probability 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 call blocking probabilities, several call admission control (CAC) schemes have been proposed in the literature. Exact analysis of these schemes using two dimensional Markov chain is computationally intensive. Therefore under specific assumptions computationally efficient methods to analyze these systems using one dimensional 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 computing call blocking probabilities for several widely known call admission control 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 one dimensional Markov chain modeling, while keeping the computational complexity low.
Place, publisher, year, edition, pages
2005. Vol. 2, 1254-1259 p.
, IEEE Wireless Communications and Networking Conference, ISSN 1525-3511
call admission control (CAC), call blocking probability, computational complexity, performance evaluation, priority based CAC schemes, quality of service (QoS), resource allocation, wireless mobile networks
IdentifiersURN: urn:nbn:se:kth:diva-58509ISI: 000230926801103ISBN: 0-7803-8966-2OAI: oai:DiVA.org:kth-58509DiVA: diva2:473190
IEEE Wireless Communications and Networking Conference. New Orleans, LA. MAR 13-17, 2005
QC 201201092012-01-052012-01-052012-01-09Bibliographically approved