Collaborative Research: NeTS-NBD: An Integrated Solution to Provide QoS, Traffic Engineering, and Fault Tolerance in an Overlay Networking Environment

最近，人们目睹了几种基于服务的覆盖体系结构的出现，这些体系结构旨在提供比当今互联网中可用的尽力而为服务更好的服务质量。这些架构中的每一个都解决了服务质量问题的不同方面，包括流量工程、服务质量(Qos)和容错。然而，由于底层网络的资源可用性和拓扑结构对覆盖层隐藏，这些体系结构必须使用各种技术来更好地控制覆盖层可能使用的资源，从而难以整合不同的体系结构来为各种应用提供丰富的服务质量。在该方案中，提出了一种新的方法，提供了一个统一的框架来实现流量工程、服务质量和容错。PIS将制定分散的交通控制法，同时提供所有这些服务质量。由于这些控制律仅使用源可推断信息，因此添加的特征在源节点本地实现。此外，由于这些控制律依赖于优化和控制理论的结果，它们实现了多个设计目标，并且具有可证明的全局稳定性和收敛性质。由于所采取的方法符合端到端设计原则，它允许：可扩展且快速地开发需要各种服务质量特征的应用；快速适应现有的覆盖和IP网络体系结构以增强其服务质量特征集；从更基本的角度更好地理解现有的端到端控制协议，例如具有或不具有多条路径的TCP。

Recently one has witnessed the emergence of several service-based overlay architectures aimed at providing service qualities better than the best effort service available in today's Internet. Each of these architectures addresses different aspects of service quality issues, including traffic engineering, Quality of Service (QoS), and fault tolerance. However, due to the fact that resource availability and topology of the underlying network layer are hidden from the overlay, these architectures have to use various techniques to gain better control of the resources that may be used by the overlay, making it difficult to integrate different architectures to provide rich service qualities for various applications.In this proposal, a novel approach is presented which provides a unified framework to enable traffic engineering, QoS, and fault tolerance. The PIs will develop decentralized traffic control laws that will provide all these service qualities simultaneously. Since these control laws only use source inferable information, the added features are implemented locally at the source nodes. Moreover, since these control laws rely on results from the theory of optimization and control, they achieve multiple design objectives with provable global stability and convergence properties. Since the approach taken complies with the end-to-end design principle, it allows: Scalable and fast development of applications requiring various service quality features; Quick adaptation to the existing overlay and IP networking architectures to enhance their service quality feature sets; Better understanding, from a more fundamental point of view, of the existing end-to-end control protocols, such as TCP with or without multiple paths.