【摘要】 提出了一种移动因特网中满足QoS约束的组播路由协议QoSHMM.基于“同层成环、异层构树”的原则,该协议建立一棵特殊的QoSHMM组播环树,从而在目的节点与源节点之间形成一条具有最短时延的路径和多条满足时延受限成本较小的路径.模拟结果显示,QoSHMM组播环树在平均切换延迟方面表现出了很好的性能,同时由于采用三态传输机制,该协议也具有很好的容错性.更多还原

【Abstract】 The paper proposed a QoS-aware multicast routing protocol called QoSHMM. The proposed protocol establishes a QoSHMM multicast tree by the principle of "ring in the same tier of the hierarchy and tree in different tiers", and it formed one shortest-delay path and multiple paths with delay-constrained minimal-cost. Simulation results show that the proposed protocol had a good performance at average handoff delays. By adopting a mechanism with 3 states of reservation transmissions, the proposed protocol also functioned well in the presence of faults.更多还原