Ενεργειακά αποδοτικές επικοινωνίες πολλαπλών χρηστών υποβοηθούμενες από έξυπνες επαναπρογραμματιζόμενες επιφάνειες
και μη επανδρωμένα εναέρια οχήματα

Tsampazi, Maria; Τσαμπάζη, Μαρία

dc.contributor.author	Tsampazi, Maria	en
dc.contributor.author	Τσαμπάζη, Μαρία	el
dc.date.accessioned	2022-02-27T19:52:02Z
dc.date.available	2022-02-27T19:52:02Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/54852
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.22550
dc.rights	Default License
dc.subject	Διαδίκτυο των πραγμάτων	el
dc.subject	5η, 6η και μετέπειτα γενιές κυψελοειδών δικτύων	el
dc.subject	Μη επανδρωμένα εναέρια οχήματα	el
dc.subject	Επαναπρογραμματιζόμενες έξυπνες επιφάνειες	el
dc.subject	Ελεγχος ισχύος	el
dc.subject	Θεωρία παιγνίων	el
dc.subject	Internet of Things	en
dc.subject	Παιχνίδι Στάκελμπεργκ	el
dc.subject	Μη ορθογωνική τεχνική πολλαπλής πρόσβασης	el
dc.subject	5G, 6G, B5G, Unmanned aerial vehicles	en
dc.subject	Reconfigurable intelligent surfaces	en
dc.subject	Power control	en
dc.subject	Game theory	en
dc.subject	Stackelberg game	en
dc.subject	Non-orthogonal multiple access technique	en
dc.title	Ενεργειακά αποδοτικές επικοινωνίες πολλαπλών χρηστών υποβοηθούμενες από έξυπνες επαναπρογραμματιζόμενες επιφάνειες και μη επανδρωμένα εναέρια οχήματα	el
heal.type	bachelorThesis
heal.classification	Simulation	en
heal.language	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2021-06-01
heal.abstract	Undeniably, the 5th Generation of wireless cellular networks (5G) is expected to meet the demands for massive user connectivity in the forthcoming Internet of Things networks, which are expected to become a core component of the smart city environments. Therefore, modern telecommunication systems must be properly designed so as for the aforementioned needs to be met in an energy efficient way. Unmanned Aerial Vehicles (UAVs) are already being used in smart cities environments as flying mobile base stations which provide on demand connectivity and at the same time eradicate presumptuous coverage holes, even in the case where the propagation conditions are unfavorable. On the other hand, Re configurable Intelligent Surfaces (RISs) provide the advantage of control over the wireless propagation environment, since they mitigate phenomena such as shadowing and fading which cause undesirable signal attenuation. In addition, the Non-Orthogonal Multiple Access Technique (NOMA), which is widely used in 5G networks, permits the massive connectivity and service of users by the base stations. The distributed resource allocation in wireless networks can be achieved through a game-theoretic approach, such as the non cooperative Stackelberg Game of a single-leader and multiple-followers, in a way that the achieved signal strength at the UAV and the users’ energy efficiency get simultaneously optimized. The UAV, the leader of the Stackelberg Game, is the base station which can determine the optimal phase shifts of the RIS’ elements in an intelligent manner so as for the beamforming of the reflected waves to be realized. The outcome of the former action will be the maximization of the total signal strength at the base station. On the other hand, the followers of the aforementioned game, i.e., the users, are already aware of the optimal phase shifts’ values, and thus, can optimize their achieved energy efficiency by transmitting with a proper transmission power. In this work, we demonstrate the contri bution of the aforementioned technologies towards the received satisfaction of the users and their power savings via a detailed theoretical analysis and numerical results stemming from simulations.	en
heal.advisorName	Papavassiliou, Symeon	en
heal.committeeMemberName	Παπαβασιλείου, Συμεών	el
heal.committeeMemberName	Βαρβαρίγου, Θεοδώρα	el
heal.committeeMemberName	Ρουσσάκη, Ιωάννα	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών. Τομέας Επικοινωνιών, Ηλεκτρονικής και Συστημάτων Πληροφορικής	el
heal.academicPublisherID	ntua
heal.numberOfPages	68 σ.	el
heal.fullTextAvailability	false