动态令牌分配的TCSN多级令牌桶流量监管算法  

Traffic Policing Algorithm of Multi-level Token Bucket for TCSN with Dynamic Token Allocation

作　　者：赵晋南 谭献海[1] 张华[1] 刘力浩 ZHAO Jinnan,TAN Xianhai,ZHANG Hua,LIU Lihao(School of Information S cience and Technology, Southwest Jiaotong University, Chengdu 611756, Chin)

机构地区：[1]西南交通大学信息科学与技术学院,成都611756

出　　处：《计算机工程》2018年第8期100-104,111,共6页Computer Engineering

基　　金：国家科技支撑计划项目"列车控制与服务网络(TCSN)关键技术及系统研制"(2015BAG14B01)

摘　　要：在列车控制与服务网络(TCSN)中,为确保控制业务的优先传输,并保证其他控制和服务业务的服务质量需求,必须对AF业务流量进行监管。传统流量监管方式是静态的,不能适应网络负载状态的不断变化。为此,提出一种动态令牌分配的TCSN多级令牌桶流量监管算法。在传统令牌桶流量监管的基础上,采用两级令牌分配算法动态调节令牌添加速率以及重新分配令牌桶富余令牌,从而实现AF控制和服务业务流量的动态监管。仿真结果表明,该算法能够根据不同网络状态下AF子队列的欠缺令牌数、时延和丢包率情况来动态调整令牌分配配额。In the Train Control and Service Network（ TCSN）,in order to ensure the priority of the transmission of control services and ensure the quality of service of other control and service business,the traffic flowof Assured Forward（AF） must be monitored. Traditional traffic monitoring methods are static,and can not adapt to changes in network load status. To solve this problem,a dynamic token allocation algorithm for TCSN multi-level token bucket traffic is proposed.On the basis of the traditional token bucket traffic supervision,the two level token allocation algorithm is used to dynamically adjust the token adding rate and redistribute the token bucket,so as to realize the dynamic regulation of the AF control and service traffic flow. Simulation results show that this algorithm can dynamically adjust the token allocation quota according to the number of missing tokens,delay and packet loss rate of AF subqueue under different network conditions.

关 键 词：列车控制与服务网络 AF业务流量 多级令牌分配 令牌添加速率 流量监管 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]