Resilient Packet Ring (RPR) is an IEEE standardized next-generation metro optical transport technology based on ring network topology .
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。
What a survivability of the network is, and how to improve the survivability of optical network based on Resilient Packet Ring (RPR) are research focuses in this paper.
什么是网络的生存性，如何提高基于弹性分组环(rpr)的光网络的生存性是本文的研究重点。
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