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《Journal of South China University of Technology(Natural Science Edition)》 2006-01
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Fast Algorithm for Calculating Call-Blocking Probability Based on FFT in Large-Scale Networks

Xu Xing Ye Wu Feng Sui-li Xie Ming(College of Electronic and Information Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China)  
In large-scale networks,the 1D fast recursion CBP (Call-Blocking Probability) algorithm proposed by Kaufman is unavailable due to the data overflow caused by the calculation of CBP.The modified Kaufman method overcomes the trouble of data overflow,but the time consumption exponentially increases with network scale.To get out of this trouble,a fast algorithm to calculate CBP based on the FFT(Fast Fourier Transform) and the pre-treatment method is proposed.Simulation results show that the fast algorithm not only avoids data overflow but also decreases computation complexity dramatically,and is of the advantages of simplicity,rapid computation and high accuracy.
【Fund】: 国家自然科学基金资助项目(69972051);; 广东省自然科学基金资助项目(31391)
【CateGory Index】: TN915.07
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