Design and analysis of one prong network restoration algorithms

To improve the reliability, broadband optical networks require fast restoration from single-link failures, node failures and multiple-link failures. This paper presents two distributed network restoration algorithms based on the one prong approach. DFOP uses a depth first search approach with a time-out mechanism to collect more network topology information. BFOP uses a breadth first search approach and a time-out mechanism to explore restoration paths with shorter hop count to reduce spare usage. They can handle single-link failures, node failures, multiple link failures and area failures. Comparisons of these algorithms with an adaptive one prong algorithm are also presented.