在光网络中,光信号沿着路由与波长分配(RWA)算法选定的光通路传输的过程中会受到各种信号损伤的影响而导致信号质量的不断下降,严重影响着业务的服务质量(QoS).而光网络中多样化的客户层业务往往有着不同的QoS的需求,因此有必要根据不同的业务QoS需求对光信号损伤的影响进行不同程度的控制.针对这一问题,提出了一种能同时考虑信号损伤限制和服务质量区分的动态RWA算法,并通过计算机仿真的方法对其性能进行了分析和验证.结果表明:该算法既能克服光网络中信号损伤的影响又能为不同级别的业务提供不同的QoS保证,更贴近实际需求.
参考文献
| [1] | Zang H,Jue J P,Mukherjee B.A review of routing and wavelength assignment assignment approaches for wavelength-routed optical WDM networks[J].Optical Networks Magazine,2000,1(1):47-63. |
| [2] | Huang Yurong,Wen Wushao,Heritage Jonathan P,et al.Signal-quality consideration for dynamic-connection provisioning in all-optical wavelength-routed networks[EB/OL].http://networks.cs.ucdavis.edu/publications/2003_ yrhuang_ 2003-07-17_ 06_ 07_ 05.pdf.2003-07-17. |
| [3] | Xi Yang,Lu Shen,Ramamurthy B.Survivable lightpath provisioning in WDM mesh networks under shared path protection and signal quality constraints[J].IEEE Journal of Lightwave Technology,2005,23(4):1556-1567. |
| [4] | Yong Quyang,Qingji Zeng,Wei Wei.Dynamic lightpath provisioning with signal quality guarantees in survivable translucent optical networks[J].Optical Express,2005,13(26):10457-10468. |
| [5] | Strand J,Chiu A,Tkach R.Issues for routing in the optical layer[J].IEEE Communications Magazine,2001,39(2):81-87. |
| [6] | Ramamurthy B,Datta D,Feng H,et al.Impact of transmission impairments on the teletraffic performance of wavelength-routed optical networks[J].IEEE Journal of Lightwave Technology,1999,17(10):1713-1723. |
| [7] | Fawaz W.Service level agreement and provisioning in optical networks[J].IEEE Communication Magazine,2004,42(1):36-43. |
| [8] | Yen J.Finding the k shortest loopless paths in a network[J].Management Science,1971,17(11):712-716. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%