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时间敏感网络的关键协议及应用场景综述 被引量:28
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作者 丛培壮 田野 +2 位作者 龚向阳 阙喜戎 王文东 《电信科学》 2019年第10期31-42,共12页
随着信息技术的发展,以物与物作为通信主体的场景需求不断增加,如工厂自动化控制、自动驾驶等,这类通信对数据传输时延的要求远远超出了传统以太网的可控范围,时间敏感网络应运而生。时间敏感网络是以标准以太网为网络基础,提供确定性... 随着信息技术的发展,以物与物作为通信主体的场景需求不断增加,如工厂自动化控制、自动驾驶等,这类通信对数据传输时延的要求远远超出了传统以太网的可控范围,时间敏感网络应运而生。时间敏感网络是以标准以太网为网络基础,提供确定性信息传输的标准化技术,通过时间感知的调度机制最小化抖动,并为时间敏感应用提供可靠的数据传输保障。通过对时间敏感网络相关国际标准的说明,介绍了其核心特性及机制,并在车载网络、工业互联网、航空电子网络和移动前传网络等应用场景进行了分析和研究。 展开更多
关键词 时间敏感网络 低时延网络 确定性传输 应用场景
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On the feasibility and efficacy of control traffic protection in software-defined networks 被引量:1
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作者 HU YanNan WANG WenDong +2 位作者 GONG XiangYang que xirong CHENG ShiDuan 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第12期40-58,共19页
Software Defined Networking (SDN) is an emerging networking paradigm that assumes a logically centralized control plane separated from the data plane. Despite all its advantages, separating the control and data plan... Software Defined Networking (SDN) is an emerging networking paradigm that assumes a logically centralized control plane separated from the data plane. Despite all its advantages, separating the control and data planes introduces new challenges regarding resilient communications between the two. That is, disconnec- tions between switches and their controllers could result in substantial packet loss and performance degradation. This paper addresses this challenge by studying the issue of control traffic protection in SDNs with arbitrary numbers of controllers. Specifically, we propose a control traffic protection scheme that combines both local rerouting and constrained reverse path forwarding protections, through which switches can locally react to fail- ures and redirect the control traffic using standby backup forwarding options. Our goal is then to find a set of primary routes for control traffic, called protected control network, where as many switches as possible can benefit from the proposed protection scheme. We formulate the protected control network problem, prove its NP-hardness, and develop an algorithm that reconciles proteetability and performance (e.g., switch-to-control latency). Through extensive simulations based on real topologies, we show that our approach significantly im- proves protectability of control traffic. The results should help further the process of deploying SDN in real-world networks. 展开更多
关键词 software-defined network PROTECTION control traffic RESILIENCE optimization
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Virtual network embedding in software-defined hybrid networks
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作者 Xu Ran Wang Wendong +1 位作者 Gong Xiangyang que xirong 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2018年第4期75-85,共11页
Network virtualization provides a powerful way of sharing substrate networks. Efficient allocation of network resources for multiple virtual networks( VNs) has always been a challenging task. Especially under the ever... Network virtualization provides a powerful way of sharing substrate networks. Efficient allocation of network resources for multiple virtual networks( VNs) has always been a challenging task. Especially under the everincreasing demand of customized VN requests,many problems arise as network conditions change constantly.Particularly with the emergance of resource conflict alongside the development of VNs,service provider( SP) needs to provide a faster and more effective solution. Recently,software defined network( SDN) has emerged as a new networking paradigm,SDN’s centralized control and customizable routing features present new opportunities for convenient and flexible embedding VNs in the network. However,due to the limitations of SDN,replacing all legacy devices in current operational networks by SDN-enabled switches in a short span of time is impractical.Thus,in our study,we focus on the scenario of VN embedding( VNE) in software-defined hybrid networks. In this work,first of all,we propose partially deploying SDN nodes; and then,we use the characteristics of SDN to allocate resources for VN requests,and redirect the path for requests conflict in hybrid SDN network. We formulate the problems and provide simple algorithms to solve them. Simulation results show that our scheme has high ratio in responsiveness and acceptance. 展开更多
关键词 SDN hybrid network VNE
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