车联网中基于动态传输距离的多跳稳定路由

Dynamic transmission range-based multi-hop stable routing in vehicular Ad-Hoc networks

数据传输是车联网(VANETs)实现交通安全的基础。然而,车辆的移动、信号传输的衰减以及彼此间的干扰对链路的可靠性均有影响。为此,提出基于动态传输距离的多跳稳定(DTMS)路由。DTMS路由在选择下一跳转发节点时,考虑到因衰减而导致的传输距离的变小,先估计车辆动态传输距离,再依据动态传输距离估计链路的连通时间以及距离因素,然后,计算邻居节点的权重,最后,基于节点权重值设置定时器,进而竞争产生下一跳转发节点。仿真结果表明,提出的DTMS路由有效地提高了数据包传输成功率。

Data transmission is the basis of Vehicular Ad-Hoc Networks(VANETs) for traffic safety. The movement of vehicles, the attenuation of signal transmission and the interference between each other have important effects on the reliability of the link. The Dynamic Transmission range-based Multi-hop Stable(DTMS) routing is proposed, which takes into account the reduced transmission distance due to attenuation when selecting the next-hop forwarding node. Firstly, the dynamic transmission distance of the vehicle is estimated, and then the connection time and distance rate of the link are estimated based on the dynamic transmission distance. The weight of the neighbor node is calculated. A timer is set based on the weight information of the node to generate the next-hop forwarding node. Simulation results show that the proposed DTMS routing can effectively improve the success rate of packet transmission.