Techno-economical studies in telecommunication networks are important and quite complicated topics. One of the major challenges is to estimate the investment in new or additional network equipment to consider a new service, or to compare two technologies in the same or different frequency band. In order to carry out this kind of analysis, a nationwide network design and dimensioning study has t...

We first introduce a generic model for discrete cost multicommodity network optimization, together with several variants relevant to telecommunication networks such as: the case where discrete node cost functions (accounting for switching equipment) have to be included in the objective; the case where survivability constraints with respect to single-link and/or single-node failure have to be ta...

Nowadays, many applications benefit from pervasive and ubiquitous computing. New services can be developed and offered. An important feature is the attempt to adapt services individually to the user. These services are called context-sensitive services, because they consider the context of the user and of his equipment. Although there are many projects that claim to be context-sensitive, a gene...

The complexity of software development has increased over the last few years. Customers today demand higher quality and more stable software with shorter delivery time. Software companies strive to improve their processes in order to meet theses challenges. Agile practices have been widely praised for the focus they put on customer collaboration and shorter feedback loops. Companies that have w...

Public analysts in Sweden agreed in 1975 to investigate under what circumstances certain new types of communication services could be used in a regional and social perspective. Could new telecommunication services be successfully used for education, for local commercial services, regionally, and for social services? Would this possibly enhance regional functions, make distant regions more effic...

Nowadays, everybody utilizes information from different sources and services from various providers. However, one must know how to find the interesting information and how to access services. Wouldnt it be better if information and service access could adapt to the user and his interests? This approach is the central point of the ubiquitous computing research. And the adaptation is done based o...

The intention of our research is to present a solution for the distribution of a portfolio of telecommunication services, such as high speed Internet access, local and long distance telephony, cable TV, and aggregated services, over the Hybrid Fiber Coax (HFC) infrastructure of a cable operator. For this purpose we have divided the logical network’s infrastructure in two well-defined areas. Fir...

Matching algorithms automatically discover semantic relations between two autonomously developed conceptual representations of two overlapping domains. Typical examples of such conceptualizations are electronic market catalogues (e.g., UNSPSC and ECL@SS) and web directories (e.g., GOOGLE and YAHOO!). The objective of this paper is the description of a use case in which matching algorithm has be...

Third generation mobile systems supporting UMTS radio access, will offer a wide range of telecommunication services including voice, video and data. In line with the ETSI GMM report, these services will be provided in both public and private environments via multiple access networks such as ATM, DECT, GSM and UMTS. The evolution path from second generation systems towards UMTS is investigated w...

While having the lowest number of main telephone lines for every one hundred inhabitants (teledensity) over the last decade, the Least Developed Countries (LDCs), have the highest average pre-tax operator profitability in the world. Many LDCs have already opened their terminal equipment markets to competition and some have also done this with data and value-added services. Furthermore, LDCs are...