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网络通信中的多播分为单树多播和成组多播。本文研究了具有带宽约束的静态多播路由问题，分别建立了基于带宽约束的单树多播和成组多播的数学模型并构造了相应的路由算法，利用此算法可使成组多播达到全局最优。
Multicast in network communication is divided into single tree multicast and multicast group. This paper studies the problem of static multicast routing with bandwidth constraints, establishes a mathematical model of single-tree multicast and multicast based on bandwidth constraints and constructs the corresponding routing algorithm, which can be used to achieve multicast multicast Global optimal.