The basic thought of the csapfba algorithm is : the edge routers perform the state management per flow , and the edge routers differentiate between the marked flows and the non - marked flows , and the edge routers insert the relevant information into the packet header by using dynamic packet state ; the core routers divide the output link bandwidth into two parts in the light of the state information of the packet header by using class - based queueing , and the core routers allocate proportionally the bandwidth to the marked flows according to their service profiles and the current network load , and the core routers allocate the bandwidth to the non - marked flows according to the principle of max - min fairness , and the csapfba algorithm can adaptively dynamically adjust the bandwidth allocation between the marked flows and the non - marked flows 本文在csfq算法的基础上，提出了一种核心无状态的自适应的成比例公平带宽分配csapfba ( core - statelessadaptiveproportionalfairbandwidthallocation )算法。 csapfba算法的基本思想是：在边界路由器完成基于每个流的状态处理，将所有的流分成标记流和非标记流两种类型，采用dps技术将有关信息编码进分组头；在核心路由器根据分组头中携带的状态信息采用cbq策略，将输出链路带宽分成两部分，对标记流根据当前的网络负荷按照服务规格成比例地分配带宽，对非标记流按照最大最小公平性原则分配带宽，并且能自适应地动态调整带宽分配的比例。
