论文标题
计算延迟限制的最小成本路径的段路由比您想象的要容易
Computing Delay-Constrained Least-Cost Paths for Segment Routing is Easier Than You Think
论文作者
论文摘要
随着准时通信服务(例如实时视频流,云游戏和行业4.0应用程序)的需求的增长,多构造的交通工程(TE)变得越来越重要。尽管经过遗产的管理飞机已被证明努力地部署,但细分路线(SR)极大地放松了TE路径的部署,因此成为许多运营商最合适的技术。 SR的灵活性引发了需求,以计算更精致的路径。特别是,对于需要低延迟和高带宽路线的实时应用程序,计算和部署延迟受限制的最小成本路径(DCLC)的明确需求。但是,当前大多数DCLC解决方案是启发式方法,而不是专门针对SR量身定制的。在这项工作中,我们利用了延迟测量的准确性和SR添加的操作约束的固有局限性。我们将这些特征包括在Best2COP的设计中,这是一种精确但有效的ECMP感知算法,该算法本质地求解了SR域中的DCLC。通过广泛的绩效评估,我们首先表明最佳2个电视即使在大型随机网络中也可以很好地缩放。在最多具有数千个目的地的真实网络中,我们的算法返回所有DCLC解决方案编码为SR路径的方式少于一秒钟。
With the growth of demands for quasi-instantaneous communication services such as real-time video streaming, cloud gaming, and industry 4.0 applications, multi-constraint Traffic Engineering (TE) becomes increasingly important. While legacy TE management planes have proven laborious to deploy, Segment Routing (SR) drastically eases the deployment of TE paths and thus became the most appropriate technology for many operators. The flexibility of SR sparked demands in ways to compute more elaborate paths. In particular, there exists a clear need in computing and deploying Delay-Constrained Least-Cost paths (DCLC) for real-time applications requiring both low delay and high bandwidth routes. However, most current DCLC solutions are heuristics not specifically tailored for SR. In this work, we leverage both inherent limitations in the accuracy of delay measurements and an operational constraint added by SR. We include these characteristics in the design of BEST2COP, an exact but efficient ECMP-aware algorithm that natively solves DCLC in SR domains. Through an extensive performance evaluation, we first show that BEST2COP scales well even in large random networks. In real networks having up to thousands of destinations, our algorithm returns all DCLC solutions encoded as SR paths in way less than a second.