摘要： 结合CDN 和P2P 两种不同网络结构的优点，改善传统内容分布网络拓扑结构，使用基于无比率限制纠错码技术改进Swarming传输协议，给出了一种高效内容分布网络设计。介绍了该内容分布网络的系统结构及相关关键技术等方面内容，以及这种新内容分布网络的特性。

关键词: P2P；CDN；Swarming；FEC；无比率限制纠错码

Abstract: Combined with merits of CDN and P2P, two kinds of network architectures, this paper addresses a design of high efficiency content distribution network, using swarming scheme based on rateless erasure codes to improve the network topology of traditional content distribution networks. It introduces the architecture of this new content distribution network, some relative key technologies of implements and merits of this new distribution network

Key words: P2P; Content distribution network ( CDN); Swarming; Forward error correction (FEC); Rateless erasure codes