P2P流媒体节点选择机制的研究与仿真

节点选择机制是P2P流媒体领域的研究热点与核心技术,近年来得到了广泛的关注和快速的发展.根据节点选择机制优化目标的不同,将节点选择机制划分为面向系统健壮性与网络负载均衡性、面向流服务质量和面向网络拓扑聚集性3类子问题.阐述了这3类问题的基本特征,常用方法和最新的研究进展.使用P2P仿真软件PeerSim统计分析3类节点选择机制在网络健壮性、同步延迟、流服务质量、网络负载4方面的影响,指出现有算法仍存在的问题和未来的研究方向.

Research and simulation for peer selection strategy on P2P streaming

Peer selection strategy is a hot topic and core technique of P2P streaming area which develops quickly and receives much at-tention.According to the different optimization objects,peer selection strategy can be divided into three categories: system stabilization and equilibrium oriented,streaming quality oriented and topology conglomeration oriented.Their basic characters,typical methods and progressaredescribed.Simulatethepeerselectionalgorithmsby PeerSim to analyzethenetworkstabilization,synchronization,streaming quality and load of network.At last,the existing problems for current algorithms and the research direction in the future are presented.