CAREER: Adaptive Reliable and Self-Managed Networks

该项目开发的协议允许网络使用多条路径来提供任意两点之间的流量需求，从而自适应地平衡这些路径上的负载。该项目研究有线和无线网络中的负载平衡，同时考虑到每个环境的特点。这项工作将理论与实践相结合，提供了易于实施的、被证明是稳定的解决方案。这项工作的贡献是多方面的。首先，开发的协议使互联网服务提供商能够应对流量需求的意外变化。当前的流量工程机制仅对预期事件的子集做出反应，例如单链路或双链路故障，它们具有预先计算的备用路由。相比之下，新协议实时重新平衡负载，以应对因涉及多个链路和路由器的中断、重大BGP重路由或网络攻击而导致的流量需求意外变化。其次，这项工作提供了第一个在运行的无线接入网络中实现多路径路由的方法。它提高了网络吞吐量，并增加了社区对如何建设更好的802.11接入网络的理解。最后，对基于覆盖和多宿主域的终端系统多路径路由和网络内多路径流量工程进行了比较，为研究拥塞控制与自适应多路径负载均衡器控制环路之间的相互作用提供了有价值的见解。

This project develops protocols that allow a network to use multiple paths to deliver traffic demands between any two points, adaptively balancing the load across these paths. The project studies load balancing in both wired and wireless networks taking into account the characteristics of each environment. The work combines theory with practice providing easy-to-implement solutions that are provably stable. The contributions of this work are multifold. First, the developed protocols allow the ISPs to cope with unanticipated changes in traffic demands. Current traffic engineering mechanisms react only to a subset of anticipated events such as single-link or two-links failures, for which they have pre-computed alternate routes. In contrast, the new protocols rebalance the load in realtime to cope with unanticipated changes in traffic demands caused by outages involving multiple links and routers, major BGP reroutes, or network attacks. Second, this work provides the first implementation of multipath routing in an operational wireless access networks. It improves the network throughput and increases the community understanding of how to build better 802.11 access networks. Finally, the work compares end-system multipath routing using overlays and multi-homed domains, and in-network multipath traffic engineering, and provides valuable insights into the interaction between TCP congestion control and the control loop of adaptive multipath load balancers.