Despite efforts from cloud and content providers to lower latency to acceptable levels for current and future services (e.g., augmented reality or cloud gaming), there are still opportunities for improvement. A major reason that traffic engineering efforts are challenged to lower latency is that the Internet's inter-domain routing protocol, the Border Gateway Protocol, is oblivious to any performance metric, and circuitous routing is still pervasive. In this work, we propose two implementation modifications that networks can leverage to make BGP latency-aware and reduce excessive latency inflation. These proposals, latency-proportional AS prepending and local preference neutralization, show promise towards providing a method for propagating abstract latency information with a reasonable increase in routing overhead.

翻译：尽管云服务提供商和内容提供商已努力将延迟降至当前及未来服务（如增强现实或云游戏）可接受的水平，但仍有改进空间。流量工程难以有效降低延迟的一个主要原因是，互联网的域间路由协议——边界网关协议（BGP）完全不感知任何性能指标，且迂回路由仍普遍存在。本研究提出两种网络可采用的实施改进方案，使BGP具备延迟感知能力并减少过度的延迟膨胀。这些方案——延迟比例自洽系统前缀追加与本地优先级中性化——有望以合理的路由开销增长为代价，提供传播抽象延迟信息的方法。