多Torrent下基于拍卖的种子节点激励算法

摘要

This paper investigates the problem that the current multi-torrent file systems lack incentives for seeder nodes, and suggests that practical multi-torrent file systems are very common, thus a good environment for seeder incentive is created; The tit for tat (TFT) incentive mechanism aims to maximize the download speed without considering the importance of seeder, so it can not be used in seeder incentive. On the basis of this, it presents an auction based seeder incentive algorithm (ABSI) : first the seeder runs an auction for its bandwidth, then the leechers send their bids to the seeder, and the seeder decides how to allocate the bandwidth. The effectiveness of the ABSI and the download time of the system are also analyzed. The experiments showed the benefits of the approach.%针对多Torrent文件系统种子节点缺乏有效激励的问题进行了研究,指出现实中多Torrent文件系统大量存在,这为种子节点激励提供了环境；争锋相对(TFT)机制其目的是用来最大化下载带宽,但没有考虑种子节点的重要作用,因此不能用于种子节点激励.进而提出了基于拍卖的种子节点激励算法(ABSI):种子节点对带宽进行拍卖,leecher节点进行出价,种子节点根据leecher节点的出价进行带宽分配.同时分析了该算法对种子节点的激励效果以及在此情况下节点下载时间的变化.实验表明该算法可以很好地用于种子节点激励.