RLDP: A novel risk-level disjoint protection routing algorithm with shared backup resources for survivable backbone optical transport networks

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• 作者：Xingwei Wang ; Lei Guo ; Cunqian Yu
• 关键词：Shared-Risk Link Groups (SRLG) ; Optical transport networks ; Risk-level disjoint ; Survivable routing
• 刊名：Computer Communications
• 出版年：2008
• 出版时间：15 January 2008
• 年：2008
• 卷：31
• 期：1
• 页码：112-118
• 全文大小：234 K

文摘

In this paper, we investigate the problem of survivable routing in backbone optical transport networks with Shared-Risk Link Groups (SRLG) constraints. We present a new idea that considers the different risk-level protection for difference service level requirements of connection requests. Based on the presented idea, we propose an effective Risk-Level Disjoint Protection (RLDP) routing algorithm for provide different service level for connection requests. In RLDP, the backup path can be partial SRLG-disjoint with the primary path, and the backup wavelengths also can be shared by different backup paths if their corresponding primary paths are risk-level disjoint. Compared with the conventional SRLG-Disjoint Protection (SDP) routing algorithm that provide full SRLG-disjoint survivable routing for each connection request, RLDP can perform better resource utilization ratio and blocking probability. Simulation results are shown to be promising.