移动Ad Hoc网络中端到端通信性能定量评估建模分析

Quantitative Modeling and Analysis for End to End Communication Performance Evaluation of Mobile Ad Hoc Networks

Ad Hoc网络作为一种新兴的无线移动自组织网络技术受到重视,如何对Ad Hoc网络进行可靠性评估是当前的研究热点。根据网络可靠性定义,针对移动Ad Hoc网络端到端通信性能的定量评估,利用连续时间马尔可夫链和M/M/1/K排队模型,提出一个全面考虑网络故障、过载和终端移动特性的复合网络模型,并通过"异常后丢包数"(ELF)、"异常后故障的转换延迟"(EDF),定量地给出Ad Hoc网络可靠性的评估结果。模拟实验结果表明该模型能够较为准确地对移动Ad Hoc网络端到端通信性能进行可靠性评估。

Ad Hoc network is a multi-hops wireless network without fixed infrastructure. Network reliability reflects the ability of network continuous function during and after failures. Now how to eval- uate network reliability performance is the key work of the research of mobile Ad Hoc network relia- bility. According to the definition of network reliability survivability in T1AI. 2, a quantitative hier- archical model for end to end communication performance evaluation of mobile Ad Hoc networks is proposed based on Continuous time Markov Chain and M/M/1/K queue. ELF and EDF are taken as the survivability performance measure. Analysis and simulation results show that this quantitative modeling and analysis are rational and useful evaluation approachs to mobile Ad Hoc networks＇ reliability performance.