A Priority-Based Defragmentation Scheme in Flexible Bandwidth Optical Networks

Abstract:

Flexible Bandwidth Optical Networks(FBON) can improve spectrum usage rates comparing to traditional WDM networks, leaving one critical problem of spectrum fragments. This paper proposes a novel defragmentation scheme that determines the sequence of connections going through defragmentation processes. In sequencing connections, priority zones are divided and priority levels are set accordingly. Bandwidths or path lengths are what make a difference in a connection’s priority. As simulation results show, priority-based defragmentation scheme can achieve lower block rates as well as lower interruption rates. The simulation results also prove the preference of local defragmentation to global defragmentation and the preference of narrow-band defragmentation to broad-band defragmentation.

• Periodical: Applied Mechanics and Materials (Volumes 198-199)
• Pages: 1632-1637
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.198-199.1632
• Online since: September 2012
• Authors: Jie Zhao, Yong Li Zhao, Xiao Song Yu, Xin Bo Wang
• Keywords: Block Rate, Defragmentation, Flexible Bandwidth Optical Networks, Interruption Rate, Priority Level

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