網(wǎng)狀WDM網(wǎng)中支持區(qū)分可靠性的共享通路保護(hù)算法
Shared-Path Protection Algorithm with Differentiated Reliability in Meshed WDM Networks
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摘要: 光纖鏈路由于共享了某些物理資源(如光纜、管道、通路等),因此存在一定的故障相關(guān)性,術(shù)語(yǔ)共享風(fēng)險(xiǎn)鏈路組(SRLG)就是用于描述鏈路之間的這種風(fēng)險(xiǎn)共享關(guān)系的.SRLG分離成為保護(hù)設(shè)計(jì)的重要約束.該文研究了支持區(qū)分可靠性的SRLG分離共享通路保護(hù)設(shè)計(jì)問(wèn)題.結(jié)合SRLG條件故障概率的概念,提出了部分SRLG分離的共享保護(hù)算法PSD-SPP(Partial SRLG-Disjoint Shared-Path Protection),有效地解決了SRLG分離約束下的區(qū)分可靠性設(shè)計(jì)問(wèn)題.仿真結(jié)果表明該算法既滿(mǎn)足了用戶(hù)的區(qū)分可靠要求,又能有效利用資源.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.
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