一种不同租借带宽用户公平性解决方法

为解决具有不同接入带宽用户在共享链路上的公平性问题，提出了一种多门限随机早期检测(RED)队列方法。该方法对RED队列进行改造，即在共享链路输出队列上为每一个接入用户设置一个RED最大门限，同时测量各接入用户所获得的实际吞吐率，并根据此测量值动态调整这一系列最大门限值，从而控制对各用户数据分组的丢弃概率,达到调整实际吞吐率比例的目的。实验表明，所提出的解决方法不仅保持了RED队列的优点，同时能够保证接入用户在共享链路获得公平带宽。

Solution to the fairness of subscribers with different bandwidth

To solve the problem that subscribers with different bandwidths obtain fair bandwidth in shared uplink, a method called multi-thresholds Random Early Detection (RED) queue was proposed. It set a RED maximum threshold for each subscriber who may have different connecting bandwidths. In the same time, it measured the real bandwidth obtained by each subscriber and adjusted the RED maximum threshold values accordingly. Therefore, the packet loss rate for each subscriber can be controlled and their actual throughput can also be adjusted in proportion to their connecting bandwidth. Simulation results show that the improved queue inherits advantages of RED and can guarantee the fairness of subscribers.