With the object exchange model (OEM) as the intermediate model, the view mechanism is discussed based on the layer relation model.

以对象交换模型作为中间模型，讨论了基于层次关系模型的视图机制，提出了一个增量维护的算法。

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First, ly, the SIB related technical terms are clarified and set in relation to each other by joining them into a layer model.

本部分首先阐明与SIB相关的技术术语，并通过将其加入层模型中来设定它们彼此之间的关系。

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With the enlargement of the network size, the topological structure of the network layer can't reflect the connecting relation between the network devices accurately.

随着网络规模的不断扩大，网络层拓扑结构已经不能准确反映网络设备之间的连接关系。

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