Contrôle d'admission du serveur d'applications IMS d'Alcatel-Lucent

: Rétro-ingénierie et amélioration

Abstract

This thesis presents a retro-engineering and an improvement of the admission control of the platform of Alcatel-Lucent (ASR). The admission control is managed by two algorithms : the flow control algorithm and the global load estimation algorithm of the system. On the one hand, both algorithms were improved. On the other hand, their behaviour has been formalised thanks to two models. Reliability, maintainability and good performance of the ASR require a redundant architecture in components, a division of these into containers, the implementation of strategies like the respect of the pattern Reactor/Proactor and the massive parallelisation of the treatment of the messages. Moreover, policy of the development team of Alcatel-Lucent consists in developing generic functionalities including the admission control. These principles complicates the improvement of a global load estimation algorithm of the system. A solution is presented in detail and a case study shows that the admission control is improved.

Date of Award	2010
Original language	English
Awarding Institution	University of Namur
Supervisor	Laurent Schumacher (Supervisor)