PIPIO：一个新的面向区分服务确保转发的主动队列管理算法

RIO是用于支持区分服务确保转发逐跳行为的主动队列管理算法，该算法是对RED算法的简单扩充。由于RED算法的性能对配置参数敏感，因此基于RED算法的RIO算法必然具有配置参数敏感的特点。PI算法是基于控制论的主动队列管理算法，具有队列长度抖动小的特点。PIP算法是PI算法的改进，比PI具有更快的收敛速度。本文基于PIP算法设计了一个新的主动队列管理算法PIPIO。该算法队列长度抖动小，同时能保护高优先级报文。

PIPIO:A New Active Queue Management Algorithm for Differentiated Services Assured Forwarding

RIO is the active queue management (AQM) algorithm for DiffServ AF PHB, which is based on RED. As the performance of RED is sensitive to configuration parameters, the performance of RIO is also sensitive to configuration parameters. PI is the AQM algorithm cased on control theory and has smaller queue length oscillation than RED. PIP improves the convergence speed of PI. The paper designs a new AQM for DiffServ AF PHB based on PIP, which is called PIPIO. PIPIO has smaller queue length oscillation than RIO and can protect high-priority packets.