Modeling Fault Propagation in Telecommunications Networks for Diagnosis Purposes

Armen Aghasaryan

Abstract: This paper describes a formalism to model the behavior of telecommunications net-works when a fault occurs and how the effects are propagated across equipment. The objective of such a formalism, which is derived from UML diagram sequences, is to ease the construction and the update of a model corresponding to the supervised network; this model can be used to simulate fault propagation in the network but also to process on-line diagnosis and determine primary causes of a set of observed alarms.