Η παρούσα διπλωματική εργασία εκπονήθηκε στο τμήμα Ηλεκτρολόγων Μηχανικών και Τεχνολογίας Υπολογιστών του Πανεπιστημίου Πατρών και το θέμα της αφορά την ηλεκτρονική χαρτογράφηση τηλεπικοινωνιακής υποδομής στην περιφέρεια δυτικής Ελλάδας και συγκεκριμένα για το μητροπολιτικό δίκτυο οπτικών ινών της Πάτρας και τον αυτόματο υπολογισμό των αποστάσεων από σημεία του υπάρχον δικτύου προς μελλοντικά σημεία επέκτασης του δικτύου. Η διπλωματική εργασία χωρίζεται σε 2 ενότητες.Στην 1η ενότητα στο 1ο κεφάλαιο παρουσιάζονται τα συστήματα επικοινωνιών με οπτικές ίνες και αναφέρονται τα επιμέρους εξαρτήματα που τα αποτελούν.Στη συνεχεία στο 2ο κεφάλαιο γίνεται αναφορά σε θέματα εγκατάστασης οπτικών ινών μέχρι τούς τελικούς συνδρομητές. Γίνονται κατηγοριοποιήσεις ανάλογα με το βαθμό συμμετοχής της οπτικής ίνας στη διαμόρφωση του τοπικού βρόχου,των διαφορετικών τοπολογιών στα οπτικά δίκτυα πρόσβασης αλλά και της τεχνολογίας που θα χρησιμοποιηθεί .Τέλος στο 3ο κεφάλαιο γίνεται αναφορά στις τεχνικές υλοποίησης οπτικών δικτύων , παρουσιάζονται οι απαιτήσεις για τις οπτικές υποδομές και δίνονται οι αναγκαίοι ορισμοί. Στην 2η ενότητα στο 4ο κεφάλαιο παρουσιάζονται τα συστήματα γεωγραφικών πληροφοριών Σ.Γ.Π., γίνεται ιδιαίτερη αναφορά στο ArcGIS το οποίο είναι και το πρόγραμμα που χρησιμοποιείται για τη ηλεκτρονική χαρτογράφηση του δικτύου,όπως παρουσιάζεται στο 5ο κεφάλαιο Στο 6ο κεφάλαιο γίνεται η μαθηματική παρουσίαση του προβλήματος της εύρεση της συντομότερης διαδρομής και την χρήση του αλγορίθμου του Dijkstra για την επίλυση αυτού ,τέλος στο 7ο κεφάλαιο παρουσιάζεται η εφαρμογή του αλγορίθμου του Dijkstra στο περιβάλλον του ArcGIS για τον υπολογισμό της συντομότερης διαδρομής από ένα σημείο του δικτύου προς ένα άλλο σημείο του πιθανού μελλοντικού δικτύου. / This diploma thesis has been developed within the Department of Electrical and Computer Engineering, University of Patras and its issue is the electronic mapping of a telecommunications infrastructure in the region of western Greece and specifically for the metropolitan fiber optic network of Patras and the automatic calculation of distances from points of existing network to points for the future network expansion. The diploma thesis is divided in to two sections. In the first section, the 1st chapter presents the fiber-optic communications systems and their individual components. Then the 2nd chapter refers to fiber optic installation issues to final subscribers. Categorizations are made depending on the degree of involvement of fiber-optic in shaping the local loop, different topologies in optical access networks and the technology used. Finally the 3rd chapter refers to the technical implementation of optical networks, present the requirements for optical infrastructure and given the necessary definitions. In the second section the 4th chapter presents the geographic information systems GIS, special reference is made to ArcGIS which is the program used for the electronic mapping of the network, as presented in the 5th chapter. The 6th chapter is the presentation of the mathematical problem of finding the shortest route and the use of Dijkstra's algorithm for solving this problem. Finally the 7th chapter presents the implementation of Dijkstra's algorithm in the environment of ArcGIS for the calculation of the shortest route from one point of the network to another point of potential future network.

No description available.

Broadband telecommunications infrastructure is considered to be an economic development necessity by a significant number of policymakers and economic development professionals, particularly in rural areas. Across the United States, a considerable amount of money is being invested in the deployment of broadband networks based, at least in part, on the premise that economic development benefits will obtain. However, there is a general lack of academic theory explaining the mechanism(s) by which broadband telecommunications can produce economic development results. The purpose of this study is to investigate the impacts of broadband at the level of the firm. It adopts as its central working hypothesis the "Producer Network" concept originally developed at Virginia Tech, which suggests that economic development benefits may result from Internet users having access to multiple megabits-per-second of symmetrical, affordable bandwidth. It employs a qualitative grounded theory methodology to identify firm-level effects of broadband use. The study's findings revealed that a majority of businesses in the case study communities were using much slower Internet connections than had been hypothesized, were using third-party, off-site web hosting, and did not believe they needed "Big Broadband." Informants to the study believed that the economic development potential of broadband in the short term depended on the ubiquitous deployment of affordable connectivity, and were more concerned with reliability than bandwidth. The study concludes that the "Producer Network" is better understood as a long-term goal than as a model to explain the current firm-level applications of the commodity Internet. It suggests that policymakers should consider broadband not as a panacea for economic development, but as a tool whose potential for impact is influenced by a number of economic, political, social, and cultural forces originating at the community, national, and global levels. Based on the literature review and the field research, it proposes a general model for broadband telecommunications in rural economic development. / Master of Public and International Affairs

El presente trabajo de investigación busca conocer cuáles son los factores que limitan la inversión extranjera directa en el desarrollo de infraestructura de las telecomunicaciones en el Perú. Ya que el uso del internet se ha vuelto una constante en el día a día de las personas, y para que dicha conexión no se vea afectada el Perú debe contar con una correcta infraestructura en el sector telecomunicaciones. Para lograr conocer aquellos factores que limitan la inversión extranjera directa en el desarrollo de infraestructura de telecomunicaciones en el Perú, se utilizó una investigación con enfoque cualitativo y diseño exploratorio mediante estudio de casos. Donde se realizaron entrevistas semi estructuradas a 15 expertos del sector telecomunicaciones, los cuales fueron divididos en 3 segmentos: empresas de telecomunicaciones extranjeras, sector público y contratistas del sector telecomunicaciones, con la finalidad de recolectar información más precisa y relevante para la investigación. Entre los principales resultados encontrados, se pudo concluir que el desarrollo de infraestructura en el sector telecomunicaciones está siendo afectado por diversos factores como: Trabas burocráticas, capacidad Institucional de los Organismos Reguladores y Municipios, Nivel de cooperación del marco legal de telecomunicaciones. Finalmente, entre los nuevos hallazgos se evidencio que la percepción de la población interfiere en el despliegue de infraestructura de telecomunicaciones, por lo que recomienda ampliar los segmentos de investigación e incorporar a la población a fin de tener en consideración su perspectiva de manera directa. / The present research work seeks to know what are the factors that limit foreign direct investment in the development of telecommunications infrastructure in Peru. Since Internet use has become a constant in people’s day-to-day lives and so that this connection is not affected, Peru must have a proper telecommunications infrastructure. To get to know those factors that limit foreign direct investment in the development of infrastructure telecommunications in Peru. Qualitative research and exploratory design using case studies were used. Where semi-structured interviews were conducted with 15 telecommunications experts, which were divided into 3 segments: foreign telecommunications companies, public sector and telecommunications contractors, for the purpose of collecting more accurate and relevant information for the investigation. Among the main results found, it was concluded that infrastructure development in the telecommunications sector is being affected by factors such as: bureaucratic obstacles, institutional capacity of the regulatory agencies and municipalities, level of cooperation in the legal framework of telecommunications. Finally, among the new findings, it is evident that the perception of the population interferes in the deployment of telecommunications infrastructure, so it is recommended to expand the research segments and incorporate the population in order to take their perspective directly into consideration. / Tesis