【摘要】：作為IP組播的替代,應(yīng)用層組播具有簡單靈活的優(yōu)勢,獲得了廣泛應(yīng)用,但時延較大的缺點對性能影響較大.針對大規(guī)模應(yīng)用層組播時延較大的問題,提出一種層次化的樹樹組播模型來降低應(yīng)用層組播時延,該模型利用兩層結(jié)構(gòu)來組織和管理應(yīng)用層組播組成員,并考慮節(jié)點性能和節(jié)點間時延來構(gòu)建較低時延的組播樹.當(dāng)節(jié)點加入或退出組播組時,設(shè)計合適的組播樹維護算法使得組播樹的時延變化較小,滿足低時延要求.計算機仿真表明該樹樹組播模型能夠有效降低應(yīng)用層組播的時延,改善大規(guī)模應(yīng)用層組播性能,適合應(yīng)用在大規(guī)模實時多媒體環(huán)境中.
[Abstract]:As an alternative to IP multicast, application-layer multicast has the advantages of simplicity and flexibility, and has been widely used, but the shortcomings of longer delay have a great impact on performance. Aiming at the problem of large application layer multicast delay, a hierarchical tree multicast model is proposed to reduce the application layer multicast delay. The model uses a two-layer structure to organize and manage application layer multicast group members. The low delay multicast tree is constructed by considering node performance and inter-node delay. When the node joins or exits the multicast group, a suitable multicast tree maintenance algorithm is designed to make the delay of the multicast tree change little and meet the requirement of low delay. Computer simulation shows that the tree multicast model can effectively reduce the delay of application-layer multicast and improve the performance of large-scale application-layer multicast. It is suitable for large-scale real-time multimedia environment.
【作者單位】： 東華大學(xué)信息科學(xué)與技術(shù)學(xué)院;東華大學(xué)數(shù)字化紡織服裝技術(shù)教育部工程研究中心;
【基金】：國家自然科學(xué)基金項目(71171045)資助 中央高�；究蒲袠I(yè)務(wù)費專項基金項目(15D110422)資助
【分類號】：TP393.03

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