一种基于QoS的VANETs多路径路由协议的设计*

为显著提高路由决策性能,在信息熵的基础上提出了用熵值定量描述链路稳定性的算法;同时综合考虑用户带宽的个性化需求,在多路径路由协议(AOMDV)的基础上设计出一种适用于城市车载Ad hoc网络的QoS路由协议BLS-AOMDV。理论分析论证了BLS-AOMDV协议的有效性及可行性。基于NS2的仿真结果表明,新协议在丢包率、时延、路由开销上都要优于传统的AOMDV多路径路由协议,因此更加适合于城市VANETs应用范畴。

QoS based multi-path routing protocol used in VANETs

Considering the specific characteristics of high mobility and uncertain stability in vehicular Ad hoc networks (VANETs), this paper proposed a novel QoS multi-path routing protocol called BLS-AOMDV (bandwidth and link stability-AOMDV) basing on Ad hoc on-demand multipath distance vector(AOMDV)to improve the performance of routing decisions. Specifically, it adopted information entropy method to quantificationally evaluate the link stability from an algorithmic perspective. Moreover, analyzed the efficiency and feasibility of BLS-AOMDV protocol theoretically. The simulation results in NS2 prove that the performances of BLS-AOMDV are better than AOMDV in packet drop ratio, delay and routing overhead, consequently demonstrating the enhancement of path-routing ability with distinct superiority.