Telecommunications are strategic assets for the design and operation of train control systems based on automatic train protection to prevent errors due to the human factor. The ERTMS/ETCS train control system developed in Europe is considered a world-wide de facto standard. It utilizes a dedicated telecommunication network based on the GSM-R system. This approach is not economically sustainable...

We analyzed the effect of the level of low asset specificity IT outsourcing on firm-level financial performance. We used transaction cost economics (TCE) as the theoretical basis to explain the effect of the level of network and telecommunication services outsourced on financial performance. An analysis of 1444 Integrated Healthcare Delivery Systems revealed that higher levels of network and te...

Object oriented techniques have proven well suited for handling the complexity of large software systems.We propose an object oriented architecture for telecommuniaction applications, where complex implementations can be build from less complex components. The choice of a particular implementation for a component may be made at runtime from a set of suitable alternatives. Furthermore we introdu...

T he advent of mobile telecommunication systems has brought the term user mobility to next-generation telecommunication network research and design. User mobility implies two things: terminal mobility—the ability of the network to locate a mobile terminal—and personal mobility— the ability of users to access defined services from any terminal in the network, while maintaining their personal env...

Next-generation network (NGN) is a new concept and becoming more and more important for future telecommunication networks. This paper illustrates five function layers of NGN architecture and discusses some end-toend QoS (quality of service) issues for NGN (called NGNQoS). The five function layers are: (1) Application Layer that supports SIP protocol; (2) Network Control Layer that aims at overc...

A telecommunication network produces daily large amounts of alarm data. The data contains hidden valuable knowledge about the behavior of the network. This knowledge can be used in ltering redundant alarms, locating problems in the network, and possibly in predicting severe faults. We describe the TASA (Telecommunication Network Alarm Sequence Ana-lyzer) system for discovering and browsing know...

The speedy pace of change in telecommunications and its ubiquitous presence have drastically altered the way people interact, impacting production, government, and social life. The infrastructure for providing telecommunication services must be continuously renewed, as innovative technologies emerge and drive changes by offering to bring new services to the end users. In this context, the probl...

Data Security has become a very serious part of any organizational information system. Internet threats have become more intelligent so it can deceive the basic security solutions such as firewalls and antivirus scanners. To enhance the overall security of the network an additional security layer such as intrusion detection system (IDS) has to be added. The anomaly detection IDS is a type of ID...

An important issue for the implementation of a system using intelligent agents for controlling a telecommunication network, is to enable low-level access of the network devices by the agent platform, bypassing the control logic inherent in them. This issue has been successfully dealt within the research project IMPACT. This paper will describe how agents can be used to control ATM switches and ...