PERFORMANCE ANALYSIS OF FAST DISTRIBUTED LINK RESTORATION ALGORITHMS

Four distributed link restoration algorithms are analysed in detail using a set of important performance metrics and functional characteristics. The functional characteristics are used to explain how these algorithms function and provide insight into their performance. The analysis and simulation results indicate that the two prong link restoration algorithm, which is based on issuing aggregate restoration requests from both ends of the disruption and on an intelligent backtracking mechanism, outperforms the other three algorithms in terms of restoration time. The RREACT link restoration algorithm consistently found paths that use fewer spares.