Fault Analysis and Fault Tolerance of a Base Station System for Mobile Communications
Hubertus Kehl · mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich) · 2000
This thesis describes a new approach for fault analysis and the evaluation of fault tolerance (FT) schemes of telecommunication systems.Mobile base stations in a mobile communication network are considered as an example for such systems.A general view of the state of the art in FT with respect to FT for Mobile Radio Systems is given.Techniques for fault analysis and FT evaluation are summarized.x 10 LITERATURE 121 1 1At the first step a failure model (FM) for the complex BTSE system will be established.As each model is always an abstraction of a real system and a perfect model, which represents the system in every aspect and in detail, is too expensive and not necessary (see [BFS83]), the system is modeled only so detailed that the intended analysis can be exerted.It will be shown that the standard definitions of availability and reliability are inappropriate for such systems, e.g. it is insufficient to model the system just as working and non-working and to use only Mean Time Between Failures (MTBF) values for components for a calculation.This is indeed not the