摘要： 在基于BT技术的文件分片传输片段选择方案基础上，提出基于KAD网和文件分片的P2P视频点播系统的设计和相应的片断选择方案，主要描述系统模型和新型的算法，该算法包括节点分类、节点服务速度的定义和估算方式、任务分配调度机制和紧急处理原则。介绍系统的实现方案，并与中心VOD方式进行对比。对比实验表明，该方案是高效和可行的。

关键词: P2P视频点播, 片断选择, Kademlia网络

Abstract: With P2P VOD segment selection solution based on BT, this paper proposes a novel segment selection solution on P2P VOD system using KAD network and file segments. This paper describes the system model and main algorithms, including peer classification, definition and estimating of peer’s service speed, principles of how to assign peers’ tasks and dealing mechanism of emergency situations. And then it introduces the implementation scheme of the system and makes a contrast experiment with centric VOD method. Experimental result proves high efficiency and feasibility of the solution.

Key words: P2P VoD, segment selection, Kademlia network

中图分类号: 

• TP391