Patent ID: 8995827
Filing Date: 2015-03-31
Classification: H04L

Abstract:
1. A method implemented by an apparatus for allocating shared spare resource capacity for a plurality of flows on partial disjoint paths (PDP), the method comprising: for each of the flows, finding a working path and a primary backup path that are mutually disjoint between a source node and a terminal node of the flow that are connected via two disjoint routes, the disjoint routes including a plurality of nodes, links, and fiber cuts; and finding a plurality of secondary backup paths that are partially disjoint and protect each fiber cut group along the two disjoint routes, wherein each of the fiber cut groups includes all fiber cut pairs on both disjoint routes that have the same effect of interrupting the flow on both disjoint routes; and aggregating the shared spare resource capacity for the working path, the primary backup path, and the partially disjoint secondary backup paths for all the flows.