车联网中可靠快速信息分发技术研究

Research on reliable and rapid message dissemination protocol in vehicular ad hoc networks

提出了一种可靠快速的信息分发(RRMD)协议,该协议采用面向发信者的方案,即由发信者选择下一跳转发者.考虑了车辆的分布特性、信道特征、链路可用性、信号冲突概率、传输时延和排队时延等因素对信息传输的影响,设计了一个端到端时延计算公式,并将其定义为优先级函数,用于下一跳节点的选择.理论分析和仿真结果证明了该协议的优越性.

In this paper,a reliable and rapid message dissemination(RRMD) protocol was proposed.The improved protocol adopted a sender-oriented scheme in which a source dominated the selection of forwarders.The factors that might have an impact on the transmission of messages such as vehicle distribution characteristics,channel characteristics,link availability,signal collision probability,accessing delay and queuing delay were taken into account.Thus,an end-to-end delay calculation scheme was designed and used as a priority function to select the next forwarder.Theoretical analysis and simulation results demonstrated the superiority of the proposed protocol.