电讯技术2017，Vol.57Issue(2)：132-138,7.DOI:10.3969/j.issn.1001-893x.2017.02.002
车联网中交通安全消息动态优先调度机制
Dynamic Priority Scheduling of Traffic Safety Messages in Internet of Vehicles
摘要
Abstract
In Internet of Vehicles,two categories of traffic safety messages share the limited control channel bandwidth,so the performance of disseminating event-driven safety messages can not be guaranteed in e―mergency,which will lead to the failure of traffic accidents warning. The differentiated disseminated per―formance of traffic safety messages based on dynamic priority scheduling mechanism is proposed. The mechanism manages the two queues according to the event priorities,gives high priority to the event-driven safety messages and sets a scheduling threshold for the high priority messages dynamic scheduling. That is to conduct the preemptive priority scheduling when the queue length is over the threshold. When the queue length is less than half of the threshold,the preemptive scheduling terminates and then the non-preemptive priority scheduling is recovered. Simulation shows that the proposed dynamic priority scheduling mecha―nism of event-driven safety messages can reduce the end-to-end delay about 1. 3 ms,and the fairness of the periodic safety messages increases about 0 . 22 .关键词
车联网/交通安全消息/周期性消息/事件触发消息/区分调度/动态优先Key words
Internet of Vehicles/traffic safety message/periodic safety message/event-driven safety messa―ges/differentiated scheduling/dynamic priority分类
信息技术与安全科学引用本文复制引用
周永筝,邱恭安,邱永芳..车联网中交通安全消息动态优先调度机制[J].电讯技术,2017,57(2):132-138,7.基金项目
国家自然科学基金资助项目(61371113) （61371113）
交通运输部应用基础研究项目(2013319825110) （2013319825110）
南通大学研究生科技创新计划项目(YKC15015) （YKC15015）
