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针对基于半马尔科夫平滑移动模型(SMS)的无线Ad Hoc网络节点相对运动速率概率分布展开研究,指出了现有基于SMS模型的节点相对运动速率概率分布分析方法存在的局限性:(1)现有分析方法得到的加速阶段节点速率概率分布与仿真结果相比偏差较大,在节点速率较小的情况下,偏差更为严重;(2)随着最小运动速率的增加,现有分析方法得出的相对速率概率分布与仿真结果相比偏差增大.针对上述局限性,本文首先通过分析得到了节点运动速率的概率分布函数,然后在此基础上提出了分析节点相对运动速率概率分布的新方法.仿真结果证明了本文提出的节点相对速率分析方法的有效性.
Aiming at the probabilistic distribution of the relative velocity of nodes in wireless Ad Hoc network based on the semi-Markov smooth movement model (SMS), this paper points out the limitations of the existing methods for analyzing the relative velocity distribution of nodes based on the SMS model. (1) The distribution of node velocity probability in the acceleration phase obtained by the existing analysis methods is greatly deviated from the simulation results, and the deviation is more serious when the node velocity is smaller; (2) With the increase of the minimum motion velocity, the existing analysis methods The relative probability distribution obtained is larger than the simulation result.For the above limitations, this paper first analyzes the probability distribution function of the node velocity, and then proposes the analysis of the probability distribution of the node relative motion velocity The new method is validated by simulation results, which proves the effectiveness of the method proposed in this paper.