This dissertation investigates routing optimization in IP telecommunication networks, under normal working conditions as well as under failure conditions. The main objectives of the present optimization procedure are the minimization of the maximum link utilization in the network and to provide a configuration that guarantees a 100% survivability degree. Traditionally two different steps are us...

Networkhervice survivability is increasingly becoming important to customers, as well as telecommunication service providers and network operators. So survivability is an important problem demanding prompt solution in design and planning of new telecommunications networks (e.g., SDH networks and ATM networks). In the past a few years, different restoration mechanisms for SDH and ATM networks ha...

In this paper, we split the service management layer, as defined in the Telecommunication Management Network (TMN), into two sublayers, namely the service application management sublayer and the service network management sublayer. The former deals with managing the mapping of the non functional requirements into functional constraints over the telecommunication service of interest, while the s...

6 7 Abstract 8 Cellular network design is a major issue in mobile telecommunication systems. In this paper, a model of the problem in its full prac-9 tical complexity, based on multiobjective constrained combinatorial optimization, has been investigated. We adopted the Pareto 10 approach at resolution in order to compute a set of diversified non-dominated networks, thus removing the need for th...

A telecommunication system like an ISDN network comprises a great variety of software components. It includes software for switches, the terminal equipment (like a simple telephone) but also for the management of resources and the provision of high level services like time dependent call forwarding. Software for telecommunication systems like other software must be fast, robust and easy to main...

Present work introduces two network design algorithms for planning UMTS (Universal Mobile Telecommunication System) access networks. The task is to determine the cost-optimal number and location of the Radio Network Controller nodes and their connections to the Radio Base Stations (RBS) in a tree topology according to a number of planning constraints. First, a global algorithm to this general p...

In this paper, we propose a method to diagnose the faults in the telecommunication networks by using the Realistic Abductive Reasoning Model 1]. This model uses abductive inference mechanism based on the parsimonious covering theory with some new features added to the general model of diagnostic problem solving. The fault diagnosis knowledge is assumed to be represented in the form of causal ch...