结合SDN控制器的TSN周期性带宽预留值计算方法  

Computing method for periodic stream reservation in TSN combined with SDN controller

作　　者：苏建忠 张华宇 朱海龙 SU Jianzhong;ZHANG Huayu;ZHU Hailong(Purple Mountain Laboratories,Nanjing 211111,China;School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]网络通信与安全紫金山实验室,江苏南京211111 [2]北京邮电大学信息与通信工程学院,北京100876

出　　处：《通信学报》2021年第10期23-31,共9页Journal on Communications

基　　金：国家重点研发计划基金资助项目(No.2020YFB1805300)。

摘　　要：近年来,随着TSN技术的发展,其低时延、低抖动、最大时延可预测的优势可以很好地应用于自动驾驶技术以及工业互联网。针对TSN协议中带宽预留技术预留至多75%(经验值)带宽的问题,同时结合SDN的数据面和控制面的分离技术,提出一种结合TSN-SDN控制器,在控制器层面规划整个拓扑的预留计划和路径的预留方案。该方案同时提供2种计算具体预留带宽值的方法,计算方法在每一跳按照时隙预留相应的带宽值。仿真环境实验结果表明,在达到时延要求的基础之上,很好地控制抖动为0,同时还可以分时隙利用带宽,为多条流同时保障带宽利用率。In recent years,with the development of TSN,its low latency,low jitter and predictable maximum delay can be widely used in automatic driving technology and industrial Internet.To solve the 75%(empirical value)bandwidth problem of stream reservation technology in TSN protocols,and combine with the separation of data plane and control plane in SDN,a stream reservation solution was put forward,which was combined with TSN-SDN controller and scheduling the transmission path and reservation of the entire topology in the control plane.And two reservation computing methods was put forward,which would give out a bandwidth with time slot.The simulation experimental results show that it can control the jitter to 0 based on require latency,and also use the bandwidth based on time slot to guarantee the utilization of bandwidth.

关 键 词：时间敏感网络 确定性网络 带宽预留 软件自定义控制器 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]