基于双重虚拟力算法的移动自组织网络节点移动策略研究

Research on Mobility Strategy for Nodes in Wireless Mobile Ad hoc Networks Based on Dual Virtual Force Algorithm

针对自组织网络中节点移动过程所带来的不确定性,本文提出一种基于双重虚拟力算法的节点移动策略,提升网络整体性能。首先,本文建立节点模型分析节点的基本移动方式与能量消耗方式;然后,设定阈值参数建立“距离虚拟力”与“能量虚拟力”双重虚拟力模型,制定节点移动策略。数值仿真结果显示:提出的移动策略可以有效提高网络整体覆盖率、节点连通率;对比单一指标的虚拟力模型,双重虚拟力模型可以降低网络能耗,提高网络生存时间。

To overcome the uncertainty of the node movement process in the wireless mobile ad hoc network,this paper proposed a mobility strategy based on the double-virtual force algorithm to improve the overall performance of the network.Firstly,this paper established the node model to analyze the movement mode and the energy consumption mode of nodes,and then the dual virtual force model was built with the double thresholds of distance and energy to form the nodes mobility strategy.The Simulations showed that,the indexes of coverage and connectivity would improve by applying the proposed strategy.Compared with the virtual force model of single index,the double-virtual force model can reduce the network energy consumption and improve the network survival time.