کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
463642 697168 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Physical topology design for all-optical networks
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
Physical topology design for all-optical networks
چکیده انگلیسی

When designing an all-optical network, the designers face a choice of laying down more fibers or increasing the number of wavelengths. Although either choice could be used to support new connections, one increases the link cost and the other increases the node (wavelength equipments) cost. The tradeoffs between link and node cost are not well understood. Using the efficient physical topology design algorithm that we propose, we study this tradeoff. We use the asymptotic growth rate of the provisioned capacity as a metric to compare various design alternatives. A higher asymptotic growth rate translates directly into a higher deployment cost for large networks. Our study shows that taking fiber length into consideration can lead to lower capacity requirement. We also find that a sufficiently large fiber-to-node ratio is necessary in order to minimize the asymptotic growth in the provisioned capacity, increase capacity utilization and minimize the need for wavelength conversion. We study a real network and find that its fiber-to-node ratio is too low. As a result, large provisioned capacity is required and less than 55% of the capacity is usable. By increasing the ratio, we can reduce the provisioned capacity and achieve close to 80% utilization.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Switching and Networking - Volume 5, Issue 4, October 2008, Pages 219–231
نویسندگان
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