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.