A priority-based defragmentation scheme in flexible bandwidth optical networks

作者：Zhao Jie^*; Zhao Yongli; Yu Xiaosong; Wang Xinbo

来源：2012 International Applied Mechanics, MechatronicsAutomation and System Simulation Meeting, AMMASS 2012, 2012-06-24 to 2012-06-26.

DOI：10.4028/www.scientific.net/AMM.198-199.1632

• Block rate
• De-fragmentation
• Flexible bandwidth
• Interruption rate
• Priority levels

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.

• 出版日期2012
• 单位北京大学