网状WDM网中支持区分可靠性的共享通路保护算法
Shared-Path Protection Algorithm with Differentiated Reliability in Meshed WDM Networks
-
摘要: 光纤链路由于共享了某些物理资源(如光缆、管道、通路等),因此存在一定的故障相关性,术语共享风险链路组(SRLG)就是用于描述链路之间的这种风险共享关系的.SRLG分离成为保护设计的重要约束.该文研究了支持区分可靠性的SRLG分离共享通路保护设计问题.结合SRLG条件故障概率的概念,提出了部分SRLG分离的共享保护算法PSD-SPP(Partial SRLG-Disjoint Shared-Path Protection),有效地解决了SRLG分离约束下的区分可靠性设计问题.仿真结果表明该算法既满足了用户的区分可靠要求,又能有效利用资源.Abstract: Fiber links, because of sharing some common physical resources （such as fiber cable, conduit, right of way, etc.）, have certain failure-dependent. The term Shared Risk Link Groups （SRLG） is introduced to describe the relationship between links with shared risk; SRLG diversity has become the important constraint of protection design problem. This paper addresses SRLG-constraint-based shared-path protection design problem with differentiated reliability. Via SRLG conditional failure probability concept, an efficient PSD-SPP （Partial SRLG-Disjoint Shared-Path Protection） algorithm is proposed to solve the protection design problem with differentiated reliability when considering links failure-dependence. Simulation result shows this algorithm not only efficiently satisfies the user-specific requirement, but also effectively decreases the network-blocking ratio.
-
Ramamurthy S, Sahasrabuddhe L, et al.. Survivable WDM mesh networks[J].Journal of Lightwave Technology.2003, 21(4):870-[2]Bolmie N, Ndousse T D, et al.. A differentiated optical service for WDM networks. IEEE Communications Magazine, 2000,38(2): 68 - 73.[3]Tacca M, Fumagalli A, et al.. Differentiated reliability in optical networks: theoretical and practical results[J].Journal of Lightwave Technology.2003, 21(11):2576-[4]Gerstel O, Sasaki G. Quality of Protection (QoP): A qauantitative-unifying paradigm to protection service grades.Optical Networks Magazine, 2002, 3(3): 40 - 50.[5]Saradhi C V, Murthy C S R. Routing differentiated reliable connections in WDM optical networks. Optical Networks Magazine, 2002, 3(3): 50 - 67.[6]Papadimitriou D, et al.. Inference of shared risk link groups.Draft-many-inference-srlg-02.txt, Intemet Draft, work in progress,Feb. 2002.[7]Grover W, Doucette J, et al.. New options and insights for survivable transport networks. IEEE Communications Magazine,2002, 40(1): 34 - 41.[8]Yuan Sheng-li, Jue J P. Shared protection routing algorithm for optical networks [J]. Optical Networks Magazine, 2002, 3(3):20 - 27. -
计量
- 文章访问数: 2232
- HTML全文浏览量: 80
- PDF下载量: 745
- 被引次数: 0
下载:
