Routing and Spectrum Allocation Algorithm Considering Traffic Balancing in Flexi-grid Optical Networks
首发时间:2012-12-13
Abstract: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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频谱灵活光网络中考虑流量均衡的路由和频谱分配算法
摘要:相对于传统的基于固定栅格的波分复用光网络,频谱灵活光网络能够在很大程度上提高频谱资源利用率。路由与频谱分配是频谱灵活光网络中最为重要的问题之一。然而,在频频谱一致性和连续性约束下,动态的光路建立和删除过程势必会带来流量不均衡的问题,造成业务阻塞和网络性能劣化。流量均衡能够使业务在网络中的分布更均匀,从而减少业务冲突概率。仿真结果表明,考虑流量均衡的路由与频谱资源分配算法的性能要优于不考虑流量均衡的路由与频谱资源分配算法的性能。
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