ARCNET列车控制网络令牌传递算法的改进  

Improvement of Train Control Network Token Passing Algorithm Based on ARCNET

作　　者：张新有[1] 魏俊超[1] ZHANG Xin-you WEI Jun-chao(School of Information Science and Technology,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学信息科学与技术学院,成都610031

出　　处：《计算机科学》2016年第8期45-49,共5页Computer Science

基　　金：国家自然科学基金-联合资助基金项目(U0970122);中央高校基本科研业务费专项资金科技创新项目(SWJTU09CX040)资助

摘　　要：对基于ARCNET网络协议的列车控制网络的特点进行了分析。针对ARCNET协议在列车控制网络中的不足,即节点的退出会引起较长的网络重构时延,提出了一种新的令牌传递的机制,即双地址令牌传递(Double Address Token Passing,DATP)。节点使用两个下一跳节点代替原来的一个下一跳节点,从而避免了节点退出网络时带来的后继节点难以快速查找的缺点。分析及仿真结果表明,该机制在保持原有网络优点的同时,提高了网络令牌传递效率,增加了系统吞吐量,从而改进了列车控制网络的性能。The features of train control network based on ARCNET are analyzed in detail in the paper. Aiming at the specific problems of ARCNET protocol used in train control network, the paper proposed a new token transmission mechanism,named DATP（Double Address Token Passing）. The nodes save two next node addresses instead of one node address used in traditional ARCNET. This mechanism can avoid the disadvantage of successor node being difficult to be found quickly when the current node leaving network. Analysis and simulation show that the new token transmis- sion mechanism increases token transmission efficiency and node＇s throughput while keeping the original advantage of ARCNET,which can improve the performance of the train control network.

关 键 词：列车控制网络 ARCNET协议 令牌 双地址令牌传递 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术] TN915.04[自动化与计算机技术—计算机科学与技术]