Patent ID: 8503315
Filing Date: 2013-08-06
Classification: H04J,H04L

Abstract:
1. A data network monitoring system for a data network having a plurality of nodes, whereby, in use, application data of relevance to a client application is transmitted in packets from node to node over the network by means of a plurality of application flows associated with said client application, each application flow being an exchange of data between the client application and one or more of a plurality of serving applications via one or more of a plurality of network paths; the monitoring system comprising: probes arranged to monitor one or more characteristics of transmitted data packets containing application data of relevance to said client application at one or more of said nodes, and identify an application flow associated with each of the monitored data packets; a processing system, comprising a computer processor, configured at least to perform: wherein the collation comprises collating respective flow-level performance measures in relation to application flows on different network paths between different serving applications and the client application whereby to derive the application-level service-quality measure.