基于可编程数据平面的实时传输技术研究  

Research on the Real-time Transmission Technology Based on the Programmable Data Plane

作　　者：董智健 蔡文龙 汤泽康 周舟 陈美娟[1] DONG Zhijian;CAI Wenlong;TANG Zekang;ZHOU Zhou;CHEN Meijuan(School of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《实验科学与技术》2024年第5期135-141,共7页Experiment Science and Technology

基　　金：江苏省省级大学生创新创业训练项目(SYB2021002);南京邮电大学研究生教学改革项目(JGKT22_XYB12)。

摘　　要：随着人们线上业务的增多,在线教育、在线会议等业务对网络时延和抖动有了更高的要求,因此,该文基于软件定义网络(SDN)架构,在可编程数据平面使用P4语言设计了一种实时传输方案。该方案基于可变阈值机制,通过在可编程数据面上建立一种阈值反馈自调节机制,使优先级调度和重路由调度能适应网络波动,降低时延。实验结果表明,改进后方案在时延和抖动方面均有明显改善,提高了实时传输业务质量。Due to the impact of the new crown epidemic,people’s online services have increased.Among them,online education,online conferences and other services have higher requirements on network delay and jitter.Therefore,based on the software defined network(SDN)architecture,this paper designs a real-time transmission scheme using the programming protocol-independent packet processors(P4)language in the programmable data plane.The scheme is based on a variable threshold mechanism and establishes a threshold feedback self-adjustment mechanism on the programmable data plane,so that priority scheduling and rerouting scheduling can adapt to network fluctuations and reduce latency.The experimental results show that the improved scheme has obvious improvements in delay and jitter,and improves the quality of real-time transmission services.

关 键 词：软件定义网络 P4语言 实时传输 可编程 重路由 

分 类 号：TN91[电子电信—通信与信息系统]