Optimizing the monitoring path design for independent dual failures

Abstract

This paper proposes a new monitoring path design paradigm for independent dual link failures. Specifically, the new approach exploits the sequential arrival and departure property of independent failure events to uniquely localize failed links. Such property, however, cannot be captured by the existing approach, which is built upon the notion of shared risk link groups. Consequently, we show via solution space comparison that the existing approach can result in overdesign in terms of monitoring resources required. Numerical results further indicate that the new approach outperforms the existing one in terms of monitoring cost and computational efficiency.

Unambiguous switching link group failure localization in all‐optical networks

“…In order to enable fast failure localization in all‐optical networks, supervisory lightpaths (S‐LP, monitoring trails or m‐trails) have been introduced . An m‐trail consists of a pair of lightpaths along a common physical route (in opposite directions), and is purely used for monitoring the on/off status of the physical links along the route at the end‐nodes.…”