用DiffServ MPLS流量工程保证NGN承载网的Qos

Apply DiffServ MPLS TE for Qos Realization in the Support Network of NGN

在下一代网络(NGN)中,提供分等级、分业务、细粒度的 Qos 保证机制是一个关键性的问题。本文分析了 NGN 实现 Qos 保证的思路,认为最终解决 NGN 的 QoS 的方法,既不能单纯地采用 IP 过载的机制,也不能够照搬 PSTN/ATM 的 QoS 技术,而应该是两种技术的融合。并根据这个思路提出 DiffServ MPLS 流量工程解决 NGN 承载网的 Qos 问题的方案和实现原理。最后详细解释了如何应用 DiffServ MPLS 流量工程解决 NGN 中话音质量的问题。

In the Next Generation Network （NGN）, the supplication of fine granularity guaranteed Qos for different classes and services is a key issue. This article analyzed the thought for the Qos guarantee in NGN, and claimed that the final way to solve the Qos issue in NGN, is neither the IP over-provision nor the PSTN/ATM Qos technology, but the combination of these two. And then accord to this thought, this article presented the scenario and theory of DiffServ MPLS TE to solve the Qos issue in the support network in NGN. Finally, this article explained how to aplly the DiffServ MPLS TE to guarantee the voice quality in NGN.