Abstract: In order to solve the problem of unstable connectivity and high bit error rate, which are caused by rapid changes in the density of vehicles on the road, while the transmission radius remained unchanged, a variable transmission range routing protocols based on vehicle density in vehicular Ad Hoc network was proposed. According to different vehicle density, node could adjust the farthest transmission distance and reduce the transmission latency of the message, which could ensure high connection probability of the network. It was proved feasible based on the change conditions of transmission range with different vehicle density, which was deduced on the basis of homogeneous Poisson point process model. Furthermore, mathematical calculate formula of average latency was obtained according to the theoretical analysis. At last, variable transmission range routing protocol based on vehicle density and fixed transmission range routing protocol were compared by simulation. The simulated results show that the proposed protocol can be applied in actual environments, and the message can be transmitted fast from source node to destination node under the condition of high connection probability.


论文引用格式：蔡 蓉,章国安,吴月波.车载网中基于车辆密度的可变传输范围路由协议.电信科学,2015071
Cai R,Zhang G A,Wu Y B.Variable transmission range routing protocol based on vehicle density in VANET.Telecommunications Science,2015071