Routing and Spectrum Allocation Algorithm Considering Traffic Balancing in Flexi-grid Optical Networks

Yu Yue; Zhao Yongli; Yu Xiaosong; Zhang Jie; Gui Keyi

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Routing and Spectrum Allocation Algorithm Considering Traffic Balancing in Flexi-grid Optical Networks

Yu Yue 1 #,Zhao Yongli 1,Yu Xiaosong 1,Zhang Jie 1 *,Gui Keyi 2

1.Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications

2.School of Information and Communication Engineering, Beijing University of Posts and Telecommunications

*Correspondence author

#Submitted by

Subject:

Funding: 863 program （No.2012AA011301), 973 program）

Opened online:13 December 2012

Accepted by: none

Citation: Yu Yue,Zhao Yongli,Yu Xiaosong.Routing and Spectrum Allocation Algorithm Considering Traffic Balancing in Flexi-grid Optical Networks[OL]. [13 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4496780

Routing and spectrum allocation is one of the most important problems in flexi-grid optical networks. Flexi-grid opticla network can improve the spectrum efficiency to a large extent compared with traditional fixed grid WDM optical networks. While the dynamic lightpath setup and teardown procedure will inevitably lead to traffic unbalancing which may block the new connections under the constraints of spectrum continuity and consecutiveness. Traffic balancing can distribute the services into the entire network, and then the probability of service collisions will be reduced. Simulation results indicate that RSA algorithm which consider the performance of traffic balancing is better than the one which only consider the performance of spectrum resource utilization.

Keywords:communication and information system; flexible bandwidth networks; routing and spectrum allocation; spectrum resource; traffic balancing

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