本文探讨了城域传送网过渡时期的建设方案。
This article is discussed on metropolitan transport network construction solution in transitional period.
业务需求和技术进步推动着城域传送网的转型。
The transformation of Metropolitan Area Transport Network was impelled by service demands and technological progress.
目前，ASON在国内的城域传送网和省级骨干传送网中已经有了少量应用，北京通信构建了ASON城域网。
Now ASON has found quite a few applications in domestic metropolitan transport networks and provincial backbone transport networks. Beijing Communications has built its metropolitan ASON.
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 .
如何在保证传统的TDM业务传送的同时，高效地传送各种数据业务，已经成为城域网面临的重要问题。
How to transmit all kinds of data services high efficiently while doesn't influence the transmission of the traditional TDM services has became a important issue which MAN is facing.
本论文所讨论的重点就是在基于SDH的城域网传送平台上如何实现多业务传送和具体的典型网络设计。
This article focuses on the issues that how to complete the multi-task transmitting and the specifically typical network designs at the City Area network platform based on SDH.
城域网正在从单纯的传送网向业务网演进，需要新的传送平台的支持。
TheMetropolitanAreaNetwork (MAN) is evolving from pure transport network to service network, which requires the support of new transport platforms.
城域网正在从单纯的传送网向业务网演进，需要新的传送平台的支持。
TheMetropolitanAreaNetwork (MAN) is evolving from pure transport network to service network, which requires the support of new transport platforms.
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