自相似业务下接纳控制研究

Call Admission Control Research of Self-Similar Traffic

本文提出了一种适应于自相似业务的呼叫接纳控制方法。在前人给出的缓冲区溢出概率公式的基础上,分析了基于分形稳定运动的有效带宽的计算方法以及根据迭代思想,推导出了已接纳业务聚合流所需的有效带宽,通过MATLAB和OPNET相结合的仿真方法研究了有效带宽随Hurst系数和特征指数的变化情况,分析了有效带宽公式在接纳控制中所使用的环境,证明了利用此有效带宽进行接纳控制的有效性。

A CAC（Call Admission Control）is presented for self-similar traffic model in thispaper. Based on the buffer size overflow derived by the predecessors, a way to calculationeffective bandwidth based on Liner Fractional Stable Noise（LFSN）is analyzed and the for-mula of effective bandwidth of aggregated traffic sources that have already been admitted is derived, according to iterative conception. The variation of effective bandwidth with theparameters of Hurst index and characteristic exponent is investigated through simulation.H-ow to select formula of effective bandwidth is analyzed and the effective-ness of CAC is proved.