Dynamic Lightpath Establishment Method Based on Maximum Spectrum Utilization for Elastic Optical Path Networks
Dynamic Lightpath Establishment Method Based on Maximum Spectrum Utilization for Elastic Optical Path Networks
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发表时间：
2017
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通讯作者：
Yuki Sato;Tomotaka Kimura;M. Muraguchi;K. Hirata
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作者：
Yuki Sato;Tomotaka Kimura;M. Muraguchi;K. Hirata
—In this paper, we propose a dynamic lightpath establish method for elastic optical path networks (EONs). EONs provide flexible frequency slot allocation and signal modulation. In EONs, a routing, modulation level, and spectrum allocation (RMLSA) problem is one of the most important technical issues. If routes, modulation formats, and frequency slots are appropriately determined for lightpaths, the spectrum efficiency is enhanced and the blocking probability of connection requests are reduced. To solve the RMLSA problem quickly and effectively, our proposed method focuses on the maximum spectrum utilization. The proposed method aims at smoothing the spectrum utilization of each link and alleviating the fragmentation of frequency slots by selecting routes, modulation formats, and frequency slots for new connections based on the maximum spectrum utilization. Through simulation experiments, we show that the proposed method effectively reduces the blocking probability of connection requests under the dynamic situations where connection requests dynamically are generated and released.
