关键词: P2P VoD系统, 预取, 片段关系, 节点关系, 播放记录

Abstract: This paper proposes a two-layer-relation prefetching strategy to effectively reduce latency problem when taking VCR operations in P2P VoD system. According to the peers’ past playing records, the possible relationships among different video segments can be found, which can be used for prefetching operations. It also optimizes the peer’s neighbor list to promote locating and prefetching resources. Experimental results show that the strategy can effectively prefetch data, reduce the latency caused by VCR and improve users’ viewing experience.

Key words: P2P VoD, prefetching, segment relation, peer relation, playing records