NGN (Next Generation Network) is a milestone of the telecommunication history, it mean the new era of the telecommunication network.

即下一代网络，它是电信史一块里程碑，标志着新一代电信网络时代的到来。

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The Metro Ethernet Forum (MEF) put forward the concept of Carrier Ethernet (ce) to improve Ethernet technology and make it a transmission convergence layer solution for Next Generation Network (NGN).

城域以太网论坛(MEF)提出了电信级以太网(CE)的概念，以改进以太网技术并使之成为下一代网络(NGN)传输汇聚层的解决方案。

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The convergence of the control layer of the next generation network (NGN) requires the call control model supporting the media control in heterogeneous network environment.

为了实现下一代网络在控制层的融合，需要具有支持异构网络环境媒体控制功能的呼叫模型。

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