【摘要】 中继节点的选择决定了车际网中消息传播的效率和可靠性。现有的中继节点选择方法多集中于高速的直道和城市的十字路口场景,对于山区环境的弯道场景研究较少。提出一种基于指数迭代分割,适用于弯道下的中继节点选择方法 EPBPC。该方法无需先验车辆信息,借助阻塞信号,通过坐标映射,选择发送节点传输范围内最远且宽度最小的子区间内节点作为中继节点,从而获得稳定的较小传输延时和较高的包到达率。在实际山路环境下的仿真实验结果表明,EPBPC在传输延时和包到达率性能上有所提升,尤其在单跳范围内车辆数较大的情况下,能获得相对于其他方法24.45%的点到点延时增益及高于99.8%的包到达率。更多还原

【Abstract】 In vehicle-to-vehicle networks,the selection of an appropriate relay node plays a key role in achieving efficient and reliable message dissemination.Current works mainly study the relay-node selection on the straight road of highways or at the intersection in urban areas,but few focuses on the curves in mountain regions.We develop an exponent-based partitioning broadcast protocol on curves(EPBPC).Without any prior information of vehicles,the EPBPC maps the vehicles’ location on the curve to some points in a straight line,and selects the node in the farthest and thinnest segment as the relay node by the aid of black burst.Simulations in a real mountain region show that the EPBPC outperforms the state-of-the-art protocols in transmission delay and packet delivery ratio:end-to-end delay can be reduced by24.45%in dense vehicle networks,and packet delivery ratio is higher than 99.8%.更多还原