车载网络中的数据分发策略

Data dissemination scheme for Vehicular Ad Hoc Networks

摘要:

通过车载网络(VAETNs)能够有效提高交通管理系统(TMS)的数据传输。然而，由于通信距离短以及车辆的移动，完成VANETs中的数据传输是一项挑战任务。为此，提出基于复杂网络指标的数据传输(MCDD)策略。MCDD策略依据二跳邻居的信息，并通过介数中心性和度中心性两项性能指标选择转发节点，进而降低开销和缩短传输时延。仿真结果表明，相比于基于区划分的全-分布式流量管理系统(FTMS)，MCDD策略的交通拥塞时间缩短了约48.95%，平均行驶速度提高了约8%。

Abstract:

Traffic Management System(TMS) is proposed to improve the traffic efficiency and minimize traffic congestion problems. Such applications are supported by Vehicular Ad Hoc Networks (VANETs). However, the data dissemination in VANETs is a challenging task due to the short-range communication and node mobility. Therefore, Metrics of Complex Networks based Data Dissemination (MCDD) scheme is proposed in this paper. In MCDD scheme, each vehicle has contextual knowledge of 2-hop neighbor to select the relay node based on two complex networks metrics, the betweeness centrality and degree centrality, in order to decrease the overhead and delay. Compared with Fully-distributed Traffic Management System(FTMS) based on districts, vehicle traffic congestion time of MCDD scheme is reduced by 18.11%, and the speed of vehicle is increased by 8%.