Analyzing Topology Dynamics in Ad Hoc Networks Using A Smooth Mobility Model
Analyzing Topology Dynamics in Ad Hoc Networks Using A Smooth Mobility Model
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DOI：
10.1109/wcnc.2007.604
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发表时间：
2007-03
期刊：
影响因子：
--
通讯作者：
Ming Zhao;Wenye Wang
中科院分区：
文献类型：
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作者：
Ming Zhao;Wenye Wang
了解节点移动性对拓扑动态的影响对于设计移动弹性自组网是至关重要的。目前的研究表明，由于不同的移动模式，移动模型可以严重影响网络拓扑结构的研究（Santi，2005）。本文分析了基于光滑模型（Zhao and Wang，2006）的拓扑动力学，因为它产生光滑的微观节点运动，没有速度衰减问题，并且保持均匀的空间节点分布。具体地说，通过使用距离转移概率矩阵P，研究了两个拓扑度量：期望链路寿命和期望链路变化率，从而根据节点间的当前距离和相对速度预测链路的存在性.通过大量的仿真验证了拓扑动力学的分析结果。此外，结合图论和排队论，将拓扑度量期望链路寿命和期望链路变化率应用于移动的ad hoc网络的连通性上界.
Understanding the impacts of node mobility on topology dynamics is essential to design a mobility resilient ad hoc network. Current research showed that mobility models can heavily affect the study of network topology due to different mobility patterns (Santi, 2005). In this paper, topology dynamics based on the smooth model (Zhao and Wang, 2006) was analyzed, because it generates smooth, microscopic nodal movements, has no speed decay problem, and maintains a uniform spatial node distribution. Specifically, two topology metrics: expected link lifetime and expected link change rate were studied by using a distance transition probability matrix P. By this means, the link existence based on the present distance between a pair of nodes and their relative speed were predicted. The analytical results of topology dynamics are validated by extensive simulations. In addition, by combining graph theory and queuing theory, the topology metrics expected link lifetime and expected link change rate was applied to formulate the upper bound connectivity of a mobile ad hoc network.