基于核的组播路由协议使用核节点作为传输中心,所有的组播数据首先被单播到核节点,然后再通过以核节点为根的分发树组播到目的节点。核节点的选择直接影响单播和组播的总代价。以总代价最小为目标,提出了核选择的完全算法和近似算法。
A core-based multicast protocol uses a core as a traffic transit center. All multicast packets are first sent to the core, and then distributed to destinations on a multicast tree rooted in the core. The choice of the core node directly affects the total cost of the transmission. Complete algorithm and approximation algorithm are proposed for core selection to minimize the total cost.