Μελέτη δικτύων πρόσβασης νέας γενιάς σε περιβάλλον γεωγραφικών συστημάτων πληροφοριών
New generation access networks in a GIS environment
Μανικάκης, Ιωάννης Λ.
SubjectΊνες, Οπτικές ; Οπτικές επικοινωνίες ; Fiber optics ; Optical communications ; Geographic Information Systems
New Generation Access (NGA), are the networks built according to a new architecture approach, so called as 'future' network access, which bypasses the limitations of the traditional copper network (Cu) bandwidth and services, offering high speeds, covering the needs of subscribers over a long time and transforming the traditional complex network in a single network where all the services are supported under the IP protocol. The shift towards the use of optical fibers for NGA is almost obligatory while perhaps the only obstacle that could slow down the expansion of NGA networks is the prohibitive cost of installing a purely optical FTTH (Fiber to the home) or a FTTB (Fiber to the building) network where the optical fiber starts from the urban center and ends within the home (FTTH) or the building (FTTB), respectively. To facilitate the implementation of such a large investment by various telecom operators in Greece, there were public consultations to establish regulations, in effect since 2009 for our country, especially regarding the internal telecommunication building's wiring and the strengthening of the FTTH and FTTB architectures. However, the weak economic power of private investors in Greece and the absence of European co-financing or public investment to the telecom companies in our country generated the need to design an alternative techno-economic plan for the development of NGA networks and Broadband in our country. The solution in that direction was given by the dominant telecommunication provider in the country, Hellenic Telecommunications Organization (OTE S.A.), who owns the urban copper network covering up to 92% of the telecom map of Greece. OTE has already invested in the NGA networks € 2 billion over the last five years. The form of the NGA developed by OTE was based on the innovation of combining copper and fiber optic technologies where two different cables coexist and cooperate in providing services and VDSL2 and FTTC (Fiber to the Cabinet) for the development of the NGA technology. Basically, for the development of this NGA model, OTE exploits the existing outgoing copper network of the outdoor cabinets, by replacing them with the advanced cabinets types C2 or C3, placing fiber from the urban center to the cabin and ensuring the bandwidth of 50 Mbps with a much lower cost compared to architectural FTTH and FTTB. In this master thesis apart from the analysis of each individual part of the NGA's technology, we also present the traditional structure of the copper access networks, the transition and the replacement of the FTTX architecture and the widespread use of optical fiber and finally we describe the successor of the NGA networks the PONS (Passive optical networks). However the main purpose of this thesis is to present and highlight the way in which through a Geographic Information System - (GIS), we can carry out a techno-economical study of an NGA project. The preparation and utilization of an NGA project case study was implemented with the GIS application developed by OTE which is capable to conduct studies of NGA projects.