车用自组织网络分层优化策略研究

Study on hierarchy and optimization in vehicular ad hoc networks

车用自组网中,有效的分层协议可以增强网络逻辑拓扑结构的稳定性,减小通信中继花费.提出利用相邻车辆节点之间的稳定和非稳定邻居关系,构建网络分层结构,同时利用优化策略选择网络中的最优簇头集合,在保证网络具有良好负载均衡度的基础上,提高网络层次结构的稳定性.仿真数据表明,算法在分层结构的稳定性以及负载均衡度等方面均优于其他算法.

In vehicular ad hoe networks, stable clustering methods could reduce the networks of communication relay and provide for a more efficient hierarchical network topology. This paper proposes weight-based stability clustering algorithm, in which stability neighbor sets are considered as a vehicular node weighted factor and an index of clustering re-affiliation. Meanwhile, to ensure networks load-balancing performance, by applying optimized algorithm, an optimized clusterhead （CH） sets is obtained. Simulation experiments are conducted to evaluate the performance of our algorithm in terrns of the number of CH, re-affiliation frequency and dominant set updates. The results show that our algorithm pefforrns better than the existing algorithms.