Solving Multiserver Systems with Two Retrial Orbits Using Value Extrapolation: A Comparative Perspective

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• 作者：Ma Jose Domenech-Benlloch ; Jose Manuel Gimenez-Guzman ; Vicent Pla ; Vicente Casares-Giner ; Jorge Martinez-Bauset
• 关键词：Wireless and Mobile Systems and Networks (WLAN ; 2G ; 3G ; 4G) ; Queueing Systems and Networks ; Stochastic Models ; Markov Models ; Performance Modelling
• 刊名：Lecture Notes in Computer Science
• 出版年：2009
• 出版时间：2009
• 年：2009
• 卷：5513
• 期：1
• 页码：56-70
• 全文大小：268.0 KB

文摘

In communication networks that guarantee seamless mobility of users across service areas, reattempts occur as a result of user behavior but also as automatic retries of blocked handovers. A multiserver system with two reattempt orbits is obtained when modeling these networks. However, an exact Markovian model analysis of such systems has proven to be infeasible and resorting to approximate methods is mandatory. To the best of our knowledge all the existing methods are based on computing the steady-state probabilities. We propose another approach based on the relative state values that appear in the Howard equations. We compare the proposed method with the most well-known methods appeared in the literature in a wide range of scenarios. The results of the numerical evaluation carried out show that this solution outperforms the previous approaches in terms of both accuracy and computation cost for the most common performance parameters used in retrial systems.