【摘要】 文章考察在分层组播拥塞控制环境下网络拥塞对组播树 (单对多 )稳定性的影响 ,定义一个稳定性因子来评估和量化这种影响 .并提出一个简单的链路相关拥塞模型 ,得到稳定性因子的通用表达式 .模拟结果表明 ,即使在链路标记概率较低的情况下 ,随着不同链路相关度的减小 ,拥塞对组播树稳定性会产生非常大的影响 .更多还原

【Abstract】 This paper studies the impact of congestion on the stability of a multicast(one-to-many)tree in the context of cumulative layered multicast congestion control mechanism.A stability factor is defined to evaluate and quantify this impact.For obtaining the general expression of the stability factor,a simple statistical model is developed.Simulation results shows that even in the case of lower link-marking probability,the stability of multicast tree is significantly more sensitive to network congestion when dependency between different links becomes smaller,indicating that more links will leave the tree when congestion occurs.更多还原