一种Ad Hoc网络群组移动模型

Group Mobility Model for Ad Hoc Networks

全面介绍了当前群组移动模型的研究进展,分析了不同群组移动模型的特点和应用范围,针时现有移动模型不能有效反映群组节点运动过程中行为特性的不足,提出了基于Gibbs分布模拟退火的群组移动(Gibbs sampler based simulated annealing group mobility,简称GGM)模型,并与目前广泛采用的参考点群组移动(reference point group mobility,简称RPGM)模型进行仿真比较,分析了两种群组移动模型对网络协议性能评价与网络拓扑的影响.仿真结果表明,通过选择不同的Gibbs势函数,GGM模型能够有效描述群体运动过程中的聚集行为、分散行为和列队行为;模型比较的结果也表明,不同的移动模型对Ad Hoc网络协议性能具有不同的影响.

This paper makes a full-scale introduction to the advancement of research on group mobility model and analyses characteristics and the application range of different models. Most of the existing group mobility models exhibit certain drawbacks in describing the group movement behaviors. A Gibbs sampler based simulated annealing group mobility （GGM） model is proposed to address this deficiency. By simulation comparison with reference point group mobility （RPGM） model, this paper analyzes the impact of two models on Ad Hoc network protocol performance. Experimental results show that the proposed GGM model can describe three different behaviors of group movements effectively, which are group gathering, dispersion, and linear formation, by choosing Gibbs potential functions. The simulation also indicates that different group mobility models have different impact on the performance evaluation of ad hoc network protocol.