一种具有ECN能力的智能分组丢弃算法

摘要

As an effective supplement to end-to-end congestion control mechanism, active queue management aims to keep high link utility while maintaining low queuing delay. As an effective mechanism, the FIPD (fuzzy intelligent packet dropping) algorithm provides a brand-new method for active queue management. However, the FIPD algorithm also has its intrinsic defects, such as high packet loss rate. The objective of this paper is to overcome the defects of FIPD, and a new active queue management method FIPE(FIPD with ECN) is also proposed.Firstly, in this paper, the algorithm FIPD is reviewed and analyzed. Then the advantages and disadvantages are also pointed out. In order to overcome the defects such as high packet loss rate, the well-known ECN mechanism is introduced, which greatly improves the successful packet transmission. At the same time, some amendments are employed and a new active queue management algorithm FIPE is developed. Finally, the validity of the new algorithm is verified by a series of simulations on NS2 simulator.%作为端到端拥塞控制机制的有效补充,主动队列管理旨在保证高链路利用率的同时维持较低的排队延迟.FIPD(fuzzy intelligent packet dropping)算法作为一种有效的机制,为主动队列管理提供了全新的方法,但是,FIPD也有其本身固有的缺点,比如居高不下的分组丢失率.旨在克服FIPD这些固有缺点的同时,提出一种新的主动队列管理方案FIPE(FIPD with ECN).首先对FIPD算法进行了总结,并对其本身的优缺点进行了分析,针对FIPD算法分组丢失率高居不下等缺点,引进了众所周知的ECN机制,起到了很大的改善作用,提高了分组的有效传送.并且,在引