Abstract: Passive monitoring by network devices can be used to validate a network traffic matrix, which aggregates end-to-end traffic demands between source-destination pairs in the network. Using information regarding the physical and logical topology of the network during the same time period as the traffic matrix, a model of the network is generated. Traffic load on each link between network devices in the network is predicted using the model and the traffic matrix. Actual traffic loads on each link are determined from the passive monitoring data from each network device. By comparing the predicted load with the actual load on each link, a measure of the validity or accuracy of the traffic matrix is obtained. The disclosed techniques can also be applied to validate a network loss matrix.

Abstract: A method is disclosed for managing tilt of an antenna providing network coverage over a coverage area. The method comprises obtaining an elevation model of the coverage area and calculating obtaining antenna attenuation to points on the elevation model according to a reference antenna tilt angle and a proposed antenna tilt angle. The method further comprises using the calculated obtained attenuations to predict an impact upon network traffic distribution within the coverage area of changing from the reference to the proposed antenna tilt angle, and approving use of the proposed antenna tilt angle if the predicted impact satisfies an acceptability criterion. Also disclosed are an apparatus and a computer program product configured to carry out methods for managing tilt of an antenna.

Abstract: A method is disclosed for managing tilt of an antenna providing network coverage over a coverage area. The method comprises obtaining an elevation model of the coverage area and calculating obtaining antenna attenuation to points on the elevation model according to a reference antenna tilt angle and a proposed antenna tilt angle. The method further comprises using the calculated obtained attenuations to predict an impact upon network traffic distribution within the coverage area of changing from the reference to the proposed antenna tilt angle, and approving use of the proposed antenna tilt angle if the predicted impact satisfies an acceptability criterion. Also disclosed are an apparatus and a computer program product configured to carry out methods for managing tilt of an antenna.