S. Székely (Germany) and S. Máté Kis (Hungary)
measurements, signalling flows, performance analysis, fault isolation and analysis, visualisation diagram
With the deployment of Voice over IP networks and Triple Play applications, there will be a huge increase in the corresponding signalling traffic of the IP networks. As these new solutions have not reached a mature level yet, it is quite obvious that during the deployment phase it comes to performance degradation or major errors, therefore a need of an efficient error analysis is quite straightforward. Our aim is to fill these gaps, as the work of identifying and isolating errors in the network is of interest for network operators and equipment manufacturers deploying complete solutions. This article presents an innovative methodology of analysing signalling message flows. Its main advantage is a system-level fault isolation, when large traces have to be quickly analysed, which contain data flows of hundreds of thousands of messages. The aim of this paper is to show the main ideas of this new methodology, presenting its advantages against classical methods throughout three case studies. The first case studies let us have a detailed look at signalling burst analyses, while the last ones give us a quick visual analyses of thousands of messages in one diagram. This methodology is useful in both performance measurements and in fault isolation methods, while it is independent of any data or signalling protocol.
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