矿井无人机车驾驶系统安全关键MAC层通信协议  

MAC layer communication protocol for safety critical information in mine unmanned locomotive driving system

作　　者：汪彩萍[1] 段章领 WANG Caiping;DUAN Zhangling(School of Computer and Information,Hefei University of Technology,Hefei 230009,China;Engineering Research Center of Safety Critical Industrial Measurement and Control Technology of Ministry of Education,Hefei 230009,China)

机构地区：[1]合肥工业大学计算机与信息学院,安徽合肥230009 [2]安全关键工业测控技术教育部工程研究中心,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2018年第10期1350-1356,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家重点研发计划专项资助项目(2016YFC0801800)

摘　　要：矿井无人机车驾驶系统作为一种合理的解决方案被广泛应用于矿井生产及运输,但井下环境复杂多变,给机车间的可靠安全通信带来诸多挑战。文章提出了一种矿井无人机车驾驶系统安全关键信息介质访问控制(media access control,MAC)层通信协议;采用事件触发(event-triggered,ET)与时间触发(time-triggered,TT)相结合的方式结合多速率动态传输机制,将整个时钟周期分为3个部分,第1部分负责分配时间片,第2部分采用最低速率发送安全等级较高的安全关键信息,第3部分采用较高速率发送普通信息和安全信息;为了进一步增强协议应对突发事件的能力,以插入脉冲间隙的方式及时响应紧急产生的安全关键信息。仿真结果表明,该协议在时延、数据包接收率方面均优于802.11p和STDMA协议,对于安全关键信息的传输成功率平均高达99%以上。Mine unmanned locomotive driving system is a good solution,which is being used in the production and transportation of mine.But the underground environment is complex and changeable,which brings a lot of challenges to the reliable and secure communication between locomotives.In this paper,a media access control(MAC)layer communication protocol for the safety critical information in mine unmanned locomotive driving system is presented.The protocol integrates the event-triggered(ET)and time-triggered(TT)protocol and adopts the multi-rate dynamic transmission mechanism.The protocol will be divided into three parts throughout the clock cycle.The first part is responsible for the allocation of time slice.In the second part,the security critical information is transmitted at the minimum rate.In the third part,the common information and the security information are transmitted at the higher rate.The method of inserting the impulse gap is used to respond to the emergent safety critical information in time.It can improve the ability of the protocol to deal with emergency events.The simulation results show that this protocol is superior to 802.11p and STDMA protocols in terms of delay and packet reception rate.And the success rate of transmission about safety critical information is above 99%.

关 键 词：安全关键 矿井 介质访问控制(MAC)层 通信协议 无人驾驶 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]