Network Protection

Path segment restoration is also called sub-path restoration. It is similar to the path restoration technique, which is however more generic than the latter. Path restoration carries out restoration always at the two end nodes of a working paths, while path segment restoration can perform restoration between any node pair on a working path as [...]

Pre-cross-connected trails (PXT) are a type of network protection technique similar to p-cycles. Rather than setting up complete circles like p-cycles, the PXT technique establishes open pre-cross-connected trails as protection path. Then depending on the location where a failure occurs, switch-over actions are taken at the two end nodes of a protected working path. Fig. [...]