So the layered structure can control the errors.

因此，这种层次型的结构可抑制误差。

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This framework is of layered and distributed structure, including a central control node layer, a convergent node layer and a leaf node layer.

该框架是分层分布式结构，由中央控制节点层、汇聚节点层和叶节点层构成。

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The NGN adapts the layered structure as service layer, control layer, media transport layer and access layer.

下一代网络采用分层的结构，分为松散耦合的业务层、控制层、媒体传输层和接入层。

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