Abstract: A method and system for monitoring the performance of end to end flows traversing a network with rapidly changing topology and with address translation and encapsulation. Multiple probes are deployed within the network and a dynamic mapping method used to enable probes to associate local address information with end to end flow identifiers.
Abstract: A subjective quality monitoring system for multimedia signal transmission systems or distributed applications software systems employs a counter which is increased if subjective quality is high and decreased if subjective quality is low in order to represent the effects of the relative temporal location of transmission impairments or system loading.
Abstract: A subjective quality monitoring system for packet based multimedia signal transmission systems estimates the parameters of a statistical model representing the probabilities of said packet based transmission system being in a low loss state or a high loss state and uses said estimates to predict the subjective quality of the multimedia signal. The quality monitoring system comprises a plurality of quality monitoring functions located at the multimedia to packet conversion points.