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We study the problem of bandwidth fragmentation in links that comprise rings and meshes in SONET networks. Fragmentation is a serious challenge for network operators since it creates "holes" in the transport pipe causing new demands to be rejected, in spite of sufficient bandwidth being available. Unlike the well-studied, general fragmentation problem, link defragmentation is "hard"...
We describe an IP-optical traffic management system that creates a "self-tuning" optical core. We show that an adaptive transport layer can significantly improve network efficiencies and thus, reduce capital and operating expenses for the carrier.
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