一种基于激励机制的P2P流媒体数据传输策略

A P2P streaming media data transmission strategy based on incentive mechanism

为提高分层P2P直播系统的服务质量,提出一种基于激励机制的推拉相结合的数据传输策略ICTMS(An Incentive based Tree-push/Mesh-pull strategy).与传统的推、拉机制相比,ICTMS充分考虑了节点的异构性,并引入了激励机制,对不同上传能力的节点分别采用推或拉机制,既结合了推机制数据分发快的优点,又包含了拉机制资源利用率高的特点,同时通过对簇首的服务加以限制来减轻簇首的压力,ICTMS策略提高了系统的整体性能,更适合大规模的流媒体应用.

To improve the QOS of Layered P2P Live System,an incentive-based Tree-push/Mesh-pull strategy ICTMS （An Incentive based Tree-push/Mesh-pull strategy） was proposed. Compared with the traditional push and pull Mechanism,ICTMS considers the heterogeneity of peers fully and introduces the incentive mechanism,for the peers of different upload capacity,it uses push or pull strategy respectively.ICTMS includes the rapid data distribution advantage of push and high resource utilization of pull.In this strategy, it also reduces the pressure of cluster header by restricting the services of cluster header.The simulation results show that ICTMS improves the overall performance of the system and it is more suitable for large-scale streaming media applications.