This work introduced the concept of hierarchical link-sharing tree, and bounded a token bucket with each class in the hierarchy, thus made it possible to shape the traffic of any class and limit the rate and burst while performing link sharing. 引用分级链路共享树概念,对应每个类设置一个令牌桶,使得在实现分级链路共享的同时可以对任意一个类的业务流进行整形,限制其速率和突发。