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摘要: 分析了现有P2P流媒体分发模型存在的问题,提出了一种跨节目的协助分发模型。该模型通过人工社会网络把合作节点的范围从单个节目扩展到全局覆盖网络,在节点间建立持久的信任与合作关系,充分利用空闲带宽以主动和被动两种协助方式提高播放流畅度,并引入TitforTat机制激励节点参与协助。实验结果表明该模型能进一步提高服务质量。