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Dynamic shared-path protection based on SRLG constraints in WDM mesh networks

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3 Author(s)
Lei Guo ; Key Lab. of Broadband Opt. Fiber Transmission & Commun. Networks, Univ. of Electron. Sci. & Technol. of China, Chengdu, China ; Hongfang Yu ; Lemin Li

We propose a novel dynamic shared-path protection (DSPP) algorithm, called DSPP-SRLG, based on shared risk link group (SRLG) constraints to protect completely multi-link failures of a single SRLG breakdown for WDM mesh networks. DSPP-SRLG can dynamically adjust the link-cost according to the current state of the network and search a primary path and a SRLG-disjoint backup path for each connection request. If two primary paths are SRLG-disjoint, then their corresponding backup paths can share the common resources. Simulation results show that not only can DSPP-SRLG completely protect multi-link failures of the single SRLG breakdown but can it also make tradeoffs between the resource utilization ratio (or blocking ratio) and the protection-switching time.

Published in:

Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on  (Volume:1 )

Date of Conference:

27-29 June 2004