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。
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。
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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