国家重点研发计划(2020YFB1804704); 国家自然科学基金(61972189); 深圳市软件定义网络重点实验室项目(ZDSYS20140509172959989)
网络测量是网络性能监控、流量管理和故障诊断等场景的基础. 带内网络遥测由于具有实时性、准确性和扩展性等特点使其成为当前网络测量研究的热点. 随着可编程数据面的出现和发展, 丰富的信息反馈和灵活的功能部署使得国内外学者提出许多具有实用性的带内网络遥测技术方案. 首先分析了典型的带内网络遥测方案INT和AM-PM的原理和部署挑战. 根据带内网络遥测的优化措施和扩展角度, 从数据采集流程和多任务组合方面分析了优化机制的特点, 从无线网络、光网络和混合设备网络等方面分析了技术扩展的可行性. 根据带内网络遥测在典型场景的应用, 从网内性能感知、网络级遥测系统、流量调度和故障诊断几个方面对比分析其在不同场景应用特点. 最后, 对带内网络遥测研究进行总结, 展望了未来的研究方向.
Network measurement is the basis of scenes including network performance monitoring, traffic management, and fault diagnosis, and in-band network telemetry (INT) has become the focus of network measurement research due to its timeliness, accuracy, and scalability. With the emergence and development of programmable data planes, many practical INT solutions have been proposed thanks to their rich information feedback and flexible function deployment. First, this study analyzes the principles and deployment challenges of typical INT solutions INT and AM-PM. Second, according to the optimization measures and extension of INT, it studies the characteristics of the optimization mechanism from the aspects of the data collection process and multi-tasking, as well as the feasibility of technology extension in terms of wireless networks, optical networks, and hybrid networks. Third, in view of the applications of INT in typical scenes, the characteristics of these INT applications are comparatively investigated from the perspectives of in-network performance sensing, network-level telemetry systems, traffic scheduling, and fault diagnosis. Finally, a research summary of INT is made, and the future research directions are predicted.