摘要：本文首先描述了分组传送网演进的驱动力和演进历史。
Abstract: This article describes the drives and history of packet transport network evolution.
在光传送网向分组传送网演进的过程中，网络之间的互联互通是运营商关心的主要问题之一。
In the evolution of the optical transport network to the packet transport network, one of the main concerns of the operators is the interworking between networks.
分组传送网(PTN)技术包括传送多协议标签交换(T - MPLS)和运营商骨干传送(PBT)。
Packet Transport Network (PTN) technology includes the Transport Multi-Protocol Label Switching (T-MPLS) and Provider Backbone Transmission (PBT).
分组传送网是网络融合的产物，在电信行业全业务运营背景下，这一技术代表了传送承栽网络的IP化发展趋势。
Packet transport network (PTN) is a convergence network of SDH and IP. Under the background of full services operation, this technology represents the development trend of transmission network.
弹性分组环（RPR）是一个由IEEE标准化的基于环网拓扑的新一代城域光传送技术。
Resilient Packet Ring (RPR) is an IEEE standardized next-generation metro optical transport technology based on ring network topology .
城市光传送网弹性分组环(rpr)技术要求等。
Metropolitan optical transport network RPR technical requirement etc.
传统的传送网和IP业务承载网在处理带宽的新型IP分组业务时，业已表现出种种不足。
The traditional transmission network and IP network has shown flawed in various ways in dealing with the new IP packet bandwidth business.
通过弹性分组环网管理帧管理弹性分组环网传送业务。
Through supervisory frame in RPR network manages transport service in RPR network.
通过弹性分组环网管理帧管理弹性分组环网传送业务。
Through supervisory frame in RPR network manages transport service in RPR network.
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