Fault Location Method for Optical Transmission Network Based on Low Density Check Matrix

Aiming at the fault location problem of large-scale optical transmission networks, a novel fault propagation model based on low-density check matrix is proposed. Also the corresponding fault location method is presented, which consists of three steps, such as collecting fault representation sets, constructing low-density check matrix, and fault locating based on belief propagation algorithm. The method has been applied in the communication network of China Southern Grid. The results show that the method is effective, fast in calculation and superior to other similar methods. It can be used for real-time fault location in on-line system.