计算机工程与应用 ›› 2010, Vol. 46 ›› Issue (18): 68-70.DOI: 10.3778/j.issn.1002-8331.2010.18.022

• 网络、通信、安全 • 上一篇    下一篇

面向视频播放的BT协议下载算法的改进

苗文健,杨雅辉   

  1. 北京大学 软件与微电子学院,北京 102600
  • 收稿日期:2009-05-22 修回日期:2009-12-30 出版日期:2010-06-21 发布日期:2010-06-21
  • 通讯作者: 苗文健

Improvement of BT downloading algorithm for video broadcast

MIAO Wen-jian,YANG Ya-hui   

  1. School of Software and Microelectronics,Peking University,Beijing 102600,China
  • Received:2009-05-22 Revised:2009-12-30 Online:2010-06-21 Published:2010-06-21
  • Contact: MIAO Wen-jian

摘要: P2P协议应用于视频播放是一项热门技术,BT协议作为P2P协议族中的成熟协议,其在文件共享下载方面有着优异的表现。从BT协议的优先级桶式下载算法出发,提出基于速度评价的片选择下载算法,该算法适应视频播放实时性和平滑性要求,使得BT协议成功应用于视频播放,从而为BT协议的应用提供了一种新的商业模式。

关键词: P2P协议, 视频播放, BT协议, 下载算法

Abstract: The P2P real-time video broadcast technology has been quite hot.The BT protocol which is a particular mature P2P protocol has a good performance in downloading data.Based on the BT bucket priority downloading algorithm,an improvement of the piece-selection algorithm is proposed.This algorithm meets both the real-time requirement and the smooth requirement,which successfully improves BT protocol to be fit for video broadcasting.And this provides a new business usage of BT protocol.

Key words: P2P protocol, video broadcast, BT protocol, downloading algorithm

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