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dc.contributor.author
Seizis, Christos
en
dc.date.accessioned
2015-06-23T15:31:13Z
dc.date.available
2015-09-27T05:58:31Z
dc.date.issued
2015-06-23
dc.identifier.uri
https://repository.ihu.edu.gr//xmlui/handle/11544/503
dc.rights
Default License
dc.title
Wi-Fi and Femtocell Management Schemes in Indoor Wireless Networks
en
heal.type
masterThesis
heal.keyword
Femtocells
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heal.keyword
Wireless LANs--Standards
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heal.keyword
Wireless communication systems
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heal.keyword
Wireless communication systems--Case studies
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heal.keyword
Dissertations, Academic
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heal.language
en
heal.access
free
el
heal.license
http://creativecommons.org/licenses/by-nc/4.0
heal.recordProvider
School of Science and Technology, MSc in Information & Communication Technology Systems
heal.publicationDate
2012-10
heal.bibliographicCitation
Seizis Christos, 2012, Wi-Fi and femtocell management schemes in indoor wireless networks ,Master's Dissertation, International Hellenic University
en
heal.abstract
This dissertation was written as a part of the MSc in ICT Systems at the International Hellenic University. It analyzes the wireless networks for indoor environments and is separated in two main thematic sections, the Wi-Fi networks and the Femtocell net-works. In the beginning theoretical aspects are explained, having to do with: a) the 802.11 b and g networks, focusing mainly on the Physical and MAC layer, b) the fem-tocell networks and more specifically their access methods and interference, c) the wire-less indoor propagation, concentrating on the characteristics of a wireless channel and the propagation mechanisms. Moving now to the first section, it describes the Wi-Fi network of the International Hellenic University. For this reason the two buildings and the exact locations of the access points have been simulated in order to present parame-ters such as: 1) the received field from every access point, 2) the SINR, taking into ac-count access points from both the two floors, 3) the areas of available data transmission rates, for both 802.11b and 802.11g, based on the values of the SINR. The second part investigates the network of femtocells for four different buildings (sce-narios) with many apartments and one FAP in each of them. In this part the main pur-pose is the management of these networks in terms of the energy efficiency and fairness and for this reason, the parameters that are examined here, are: 1. Number of neighboring apartments that every femtocell can cover. 2. Number of Active FAPs, to cover requests from users of different apartments. 3. Time that every FAP operates, according to its coverage ability. 4. Time that a user is served from its own femtocell or from a neighboring. 5. Power consumption of the network and the energy saving. It is also very important before going to the main body of the project to express my gratitude to the supervisor of this dissertation Dr. Michela Meo and the co-supervisor Dr. George Koutita, for their valuable and implicit collaboration and assistance during the whole period of its preparation. Last but certainly not least, the parent’s contribution must also not be omitted, since it was of vital importance for the completion of the pro-ject.
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heal.tableOfContents
ABSTRACT .................................................................................................................. II CONTENTS ................................................................................................................. III 1 INTRODUCTION ........................................................................................................ 5 1.1 GENERAL .............................................................................................................. 5 1.1.1 Wi-Fi Networks ...................................................................................... 6 1.1.2 Femtocell Networks .............................................................................. 8 1.2 CONTRIBUTION - PROJECT WORK ....................................................................... 9 1.3 ACHIEVEMENTS .................................................................................................. 11 1.4 STRUCTURE OF THE DISSERTATION ................................................................... 11 2 WI-FI AND FEMTOCELL NETWORKS ................................................................ 13 2.1 WI-FI NETWORKS ............................................................................................... 13 2.1.1 Radio Spectrum – Available Channels – Bandwidth ..................... 13 2.1.2 Physical Layer ..................................................................................... 15 2.1.3 MAC Layer ........................................................................................... 19 2.2 FEMTOCELL NETWORKS ..................................................................................... 21 2.2.1 Access Methods .................................................................................. 22 2.2.2 Interference .......................................................................................... 25 2.3 PROPAGATION IN INDOOR NETWORKS ............................................................... 30 2.3.1 Characteristics of a Wireless Channel ............................................. 30 2.3.2 Propagation Mechanisms .................................................................. 36 3 WI-FI NETWORK IN IHU ........................................................................................ 42 3.1 INTERNATIONAL HELLENIC UNIVERSITY ............................................................. 42 3.1.1 The Wi-Fi Network .............................................................................. 44 3.2 RECEIVED FIELD FROM EVERY ACCESS POINT ................................................. 45 3.3 BEST SERVER PLOTS ......................................................................................... 46 3.4 SINR .................................................................................................................. 47 3.5 DATA RATE COMPUTATIONS .............................................................................. 48 -iv- 3.6 RESULTS ............................................................................................................ 49 3.6.1 Building A – 1st Floor .......................................................................... 50 3.6.2 Building A – 2nd Floor ......................................................................... 51 3.6.3 Building B – 1st Floor .......................................................................... 52 3.6.4 Building B – 2nd Floor ......................................................................... 53 3.7 DISCUSSION ....................................................................................................... 54 4 FEMTOCELL MANAGEMENT SCHEMES ......................................................... 57 4.1 DESCRIPTION OF SCENARIOS ............................................................................ 57 4.2 COVERAGE SPARSE MATRIX ............................................................................. 60 4.2.1 Scenario 1 ............................................................................................ 61 4.2.2 Scenario 2 ............................................................................................ 64 4.2.3 Scenario 3 ............................................................................................ 67 4.2.4 Scenario 4 ............................................................................................ 69 4.2.5 Densities .............................................................................................. 71 4.3 FAIRNESS ........................................................................................................... 71 4.4 PROPOSED ALGORITHM ..................................................................................... 72 4.4.1 Energy Efficiency ................................................................................ 76 4.4.2 Fairness................................................................................................ 79 5 RESULTS .................................................................................................................. 85 5.1 SCENARIO 1 ....................................................................................................... 85 5.2 SCENARIO 2 ....................................................................................................... 91 5.3 SCENARIO 3 ....................................................................................................... 95 5.4 SCENARIO 4 ..................................................................................................... 100 6 CONCLUSIONS ..................................................................................................... 104 6.1 FUTURE WORK ................................................................................................. 110 REFERENCES........................................................................................................... 111
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heal.advisorName
Meo, Dr. Michela
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heal.committeeMemberName
Meo, Dr. Michela
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heal.committeeMemberName
Koutitas, G.
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heal.committeeMemberName
Tzaras, Dr K.
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heal.academicPublisher
School of Science &Technology, Master of Science (MSc) in Information and Communication Systems
en
heal.academicPublisherID
ihu
heal.numberOfPages
114
heal.fullTextAvailability
true


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