Abstract: Token bucket algorithm is applied to solve the problem that a large amount of bandwidth is occupied by the BT traffic. It is analyzed how the download rate and the number of users in the controlled network are changed after BT bandwidth control. The result shows that the data transmission rate between the peers in the network increases properly, the average download rate of the peers in the network decreases properly, and the average peer number of the network increases. The device with the function of BT bandwidth control is placed in a test network. The test result shows that the algorithm is effective and the analysis result is correct.

Key words: BitTorrent, Token bucket, Traffic control

摘要： 针对BT流量占用大量带宽资源的问题，提出了BT令牌桶流量控制算法。分析了在网络出口控制BT带宽前后，内网用户的下载速率和内网平均用户数的变化。结果表明，控制出口BT带宽后，内网peer之间的数据传输速率会适当增加，平均每个peer的下载速率有所减少，平均内网peer数增加。将具有BT令牌桶流控功能的设备应用于试验网络环境中，测试结果表明，该算法有效，分析结果正确。

关键词: BitTorrent, 令牌桶, 流量控制