Load-Balanced Fixed Routing for Wavelength Routed Optical Networks

Load-Balanced Fixed Routing for Wavelength Routed Optical Networks
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波长路由光网络的负载平衡固定路由

DOI:
10.1109/lcomm.2013.043013.122411
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发表时间:
2013-05
期刊:
IEEE Communications Letters
影响因子:
--
通讯作者:
Shen, Gangxiang
Shen, Gangxiang
中科院分区:
其他
文献类型:
--
作者:
Li, Yongcheng;Peng, Limei;Shen, Gangxiang

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固定最短路径路由由于其简单的光路服务提供方式而被认为是波长路由光网络中主要的服务提供策略之一。然而,采用固定的最短路径会导致网络流量负载分布不均衡,从而导致网络拥塞。在本文中,我们提出了一种新的负载平衡固定路由(LBFR)计划,可以避免网络拥塞,并保留了操作简单的固定路由。采用基于预测的业务负载矩阵的预训练过程来找到每对节点之间的(一个或几个)固定路由以用于光路服务供应。对于波长连续性约束下的波长路径网络,我们还建立了一个分析模型,该模型可以有效地估计每对节点之间多条固定路由下的光路阻塞性能。实验结果表明,与传统的固定最短路径路由算法相比,LBFR算法在光路阻塞方面具有更好的性能,并且随着网络节点度的增加,性能的改善更加显著.
Due to simplicity in lightpath service provisioning, fixed shortest path routing is considered as one of major provisioning strategies in the wavelength routed optical networks. Nonetheless, the employment of fixed shortest routes can cause unbalanced network traffic load distribution and consequentially lead to network congestion. In this paper, we propose a novel Load-Balanced Fixed Routing (LBFR) scheme that can avoid network congestion and retain the operational simplicity of fixed routing. A pre-training process based on a forecasted traffic load matrix is employed to find a (or few) fixed route(s) between each pair of nodes for lightpath service provisioning. For a wavelength path (WP) network subject to the constraint of wavelength continuity, we also develop an analytical model that can effectively estimate lightpath blocking performance under multiple fixed routes between each pair of nodes. Results show that the proposed LBFR can perform much better than traditional fixed shortest path routing in lightpath blocking, and performance improvement becomes more significant with an increasing network nodal degree.
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