METHOD AND ARRANGEMENT FOR FAULT ANALYSIS IN A MULTI-LAYER NETWORK

摘要

The invention relates to a method for fault analysis in a multi-layer network. The method includes receiving a first set of performance measurements occurring in response to the fault and representing at least a first and a second layer in a multi-layer communications network. A probable set of network elements affected by the fault are localized. The type of fault is inferred from one or more symptoms in the performance measurements. The root cause of the failure is determined from a combination of information on probable set of network elements and inferred type of fault.;The invention also relates to a network management node for carrying out the method. The node includes a root cause analyzer to detect affected network elements and fault type upon network failure, wherein affected network elements are determined in a spatial localization unit and the fault type is determined in a fault type inference unit.

主权项

1. A method in a network management system for diagnosing a root cause of a fault in a multi-layer communications network, comprising:
receiving a first set of performance measurements representing performance of network elements on at least a first and a second layer in the multi-layer communications network; localizing the fault by identifying, based on the first set of performance measurements, a probable set of network elements affected by the fault; inferring a type of fault from one or more symptoms incurred from one or more performance measurements in the first set of performance measurements; and determining the root cause by combining information on the probable set of network elements with the inferred type of fault.