P2P流媒体直播系统中的合作节点选择策略

A Cooperative Peer Selection Strategy in P2P Live Streaming System

合作节点选择是P2P流媒体直播系统中的核心问题之一。针对此问题进行深入分析,提出了一种基于服务能力的启发式合作节点选择策略,根据节点的服务能力对其在系统中的位置进行自适应调整,使得节点最终形成层状结构,且服务能力越高的节点位于越高层。仿真结果表明,与随机选择策略相比,该策略能够显著降低系统传输延迟。

Cooperative peer selection is one of the key problems in P2P live streaming system.This paper proposes a heuristic selection strategy based on peer＇s service capacity.With this strategy,peers will make adaptive adjustment to its location in term of the service capacity,and finally construct a hierarchical topology,in which the peers of higher service capacity locate in higher layer. The results of simulation indicate this strategy can achieve better system delay compared with random selection strategy.