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The authors propose an efficient network architecture to implement optical fast circuit switching. Future bandwidth abundant services such as Ultra High Definition TeleVision (UHDTV), lambda-leased line services, and layer-one optical VPNs will generate less-bursty traffic that will fill wavelength path capacity. To realize effective optical fast switching networks, the authors introduce a hierarchical structure that combines physical network and optical path levels. A higher physical layer network (transit network) bridges several lower layer networks (local networks). The optical path layer is divided into two layers; a waveband path (a group of wavelength paths), and wavelength path layer. The transit networks employ large granular optical paths, waveband paths.
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