Davide Cherubini - PhD Thesis - UniCA Eprints

2.4 Restoration SchemesIn contrast, in link restoration, the end nodes of the failed link are responsiblefor rerouting the affected traffic flows as depicted in figure 2.3(b).Path restoration will require less spare capacity, but is more complex to implementwith respect to link restoration, as many more nodes are involved in therestoration process, and it is also slower in the speed of restoration as comparedto link restoration.In the present dissertation will be presented models that make use of the linkrestoration as well as a preliminary model with the path restoration scheme.(a) Path restoration(b) Link restorationFigure 2.3: Failure restoration schemes13