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Partial path protection for WDM networks: end-to-end recovery using local failure information

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3 Author(s)
Wang, H. ; Lab. for Inf. & Decision Syst., MIT, Cambridge, MA, USA ; Modiano, E. ; Medard, M.

We propose a new protection scheme, which we term partial path protection (PPP), to select end-to-end backup paths using local information about network failures. PPP designates a different restoration path for every link failure on each primary path. PPP also allows reuse of operational segments of the original primary path in the protection path. A novel approach used in this paper is that of a dynamic call-by-call model with blocking probability as the performance metric, this model is in contrast with traditional capacity-efficiency measurement for batch call arrivals. Additionally, we show that a simple method based on shortest path routing for which primary paths are selected first is more effective than a greedy approach that minimizes, for each call arrival, the number of wavelengths used by the primary and backup path jointly.

Published in:

Computers and Communications, 2002. Proceedings. ISCC 2002. Seventh International Symposium on

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