Dissertation/ Thesis
Contribution to peer to peer constellations in broadcasting environments ; Διομότιμοι σχηματισμοί και αρχιτεκτονικές σε περιβάλλον επίγειας ψηφιακής ευρυεκπομπής
| العنوان: | Contribution to peer to peer constellations in broadcasting environments ; Διομότιμοι σχηματισμοί και αρχιτεκτονικές σε περιβάλλον επίγειας ψηφιακής ευρυεκπομπής |
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| المؤلفون: | Markakis, Evangelos, Μαρκάκης, Ευάγγελος |
| بيانات النشر: | University of the Aegean Πανεπιστήμιο Αιγαίου |
| سنة النشر: | 2014 |
| المجموعة: | National Archive of PhD Theses (National Documentation Centre Greece) |
| مصطلحات موضوعية: | Διαχείριση δικτύων, Ομότιμα δίκτυα, Επίγεια ψηφιακή τηλεόραση, P2P, Proactive caching, Terrestrial digital video broadcasting DVB-T, Broadcasting, Επιστήμες Μηχανικού και Τεχνολογία, Επιστήμη Ηλεκτρολόγου Μηχανικού, Ηλεκτρονικού Μηχανικού, Μηχανικού Η/Υ, Engineering and Technology, Electrical Engineering, Electronic Engineering, Information Engineering |
| الوصف: | This Ph.D. thesis contributes to the issue of efficient resource exploitation in interactive broadcasting environments by studying, designing, and implementing a novel P2P delivery mechanism that allows users to share, deliver and consume content distributed in the network, with maximum possible QoS. Building upon the recent advances in digital terrestrial video broadcasting (DVB-T), the thesis initially discusses the overall architecture of an interactive DVB/IP infrastructure in decentralised configuration, where the Ultra High Frequency (UHF) stream acts as the downlink of a backbone segment that interconnects intermediate nodes (Cell Main Nodes – CMNs), while uplink data are delivered over point-to-point channels. Users access this backbone segment via the corresponding CMN, by utilising wired and/or wireless point-to-multipoint links (access segment). Following a number of experimental evaluation tests in actual transmission/reception conditions, the thesis elaborates on the overall system’s performance during IP services provision under the Client/Server model following best-effort scheme, and identifies architectural design issues for guaranteed QoS provision. Towards this, it studies bandwidth management techniques (at the Network layer) for dynamically adapting/allocating the available backbone resources (i.e. in the DVB-T stream) according to the QoS requirements of each service, and proposes the implementation of DiffServ policies for guaranteed QoS provision. Analysis of experimental results has verified the validity of proposed DiffServ implementation, besides revealing the system’s capacity in terms of efficient resource exploitation. More specifically, it was observed that while the DVB-T downlink (backbone segment) is easily saturated during inter-CMN content delivery (a matter of course of the number of concurrent users and services’ bandwidth requirements), other network segments (such as the access and/or the uplinks from the CMNs) remain underutilised or even totally unexploited. In order to ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| Relation: | http://hdl.handle.net/10442/hedi/34935 |
| DOI: | 10.12681/eadd/34935 |
| الاتاحة: | http://hdl.handle.net/10442/hedi/34935 https://doi.org/10.12681/eadd/34935 |
| Rights: | BY_NC |
| رقم الانضمام: | edsbas.E482CB02 |
| قاعدة البيانات: | BASE |
| DOI: | 10.12681/eadd/34935 |
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