论文标题
大规模确定性IP网络的联合路由和安排
Joint Routing and Scheduling for Large-Scale Deterministic IP Networks
论文作者
论文摘要
随着5G的出现和Internet协议的发展,工业应用程序正在从垂直解决方案转变为需要满足确定性服务质量(QOS)要求的通用基础架构。 IETF Detnet工作组旨在为(i)确定性的最差延迟和抖动提供答案,并为时间敏感的流量提供支持。在本文中,我们使用指定的排队和转发(CSQF)的大规模确定性网络的联合路由和调度问题,该网络(CSQF)是循环排队和转发(CQF)的扩展,并具有多个传输队列和段路由的支持。在这种情况下,我们提出了两种集中算法,以最大程度地提高网络计划和在线流程的流量接受。我们提出了一个基于列的生成和动态编程的有效解决方案。由于具有有效的不平等现象的模型加强,我们改善了上限和解决方案。我们在现实的情况下证明,我们达到了几秒钟内达到小于10%的最佳差距。最后,我们还得出了一种超快速的自适应贪婪算法,以以较小的额外差距为代价来解决问题。
With the advent of 5G and the evolution of Internet protocols, industrial applications are moving from vertical solutions to general purpose IP-based infrastructures that need to meet deterministic Quality of Service (QoS) requirements. The IETF DetNet working group aims at providing an answer to this need with support for (i) deterministic worst-case latency and jitter, and (ii) zero packet loss for time-sensitive traffic. In this paper we focus on the joint routing and scheduling problem in large scale deterministic networks using Cycle Specified Queuing and Forwarding (CSQF), an extension of Cyclic Queuing and Forwarding (CQF) with multiple transmission queues and support of segment routing. In this context, we present two centralized algorithms to maximize traffic acceptance for network planning and online flow admission. We propose an effective solution based on column generation and dynamic programming. Thanks to the reinforcement of the model with valid inequalities, we improve the upper bound and the solution. We demonstrate on realistic instances that we reach an optimality gap smaller than 10% in a few seconds. Finally, we also derive an ultra-fast adaptive greedy algorithm to solve the problem at the cost of a small extra gap.