Wireless throughput and energy efficiency under QoS constraints
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- Tez No: 715947
- Danışmanlar: Belirtilmemiş.
- Tez Türü: Doktora
- Konular: Bilgisayar Mühendisliği Bilimleri-Bilgisayar ve Kontrol, Elektrik ve Elektronik Mühendisliği, Computer Engineering and Computer Science and Control, Electrical and Electronics Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2017
- Dil: İngilizce
- Üniversite: Syracuse University
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 249
Özet
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Özet (Çeviri)
Mobile data tra has experien ed unpre edented growth re ently and is predi ted to grow even further over the oming years. As one of the main driving for es behind this growth, wireless transmission of multimedia ontent has signi antly in reased in volume and is expe ted to be the dominant tra in data ommuni ations. Su h wireless multimedia tra requires ertain quality-of-servi e (QoS) guarantees. With these motivations, in the rst part of the thesis, throughput and energy e ien y in fading hannels are studied in the presen e of randomly arriving data and statisti al queueing onstraints. In parti ular, Markovian arrival models in luding dis rete-time Markov, Markov uid, and Markov-modulated Poisson sour es are onsidered, and maximum average arrival rates in the presen e of statisti al queueing onstraints are hara terized. Furthermore, energy e ien y is analyzed by determining the minimum energy per bit and wideband slope in the low signal-to-noise ratio (SNR) regime. Following this analysis, energy-e ient power adaptation poli ies in fading hannels are studied when data arrivals are modeled as Markovian pro esses and statisti al QoS onstraints are imposed. After formulating energy e ien y (EE) as maximum throughput normalized by the total power onsumption, optimal power ontrol poli- ies that maximize EE are obtained for dierent sour e models. Next, throughput and energy e ien y of se ure wireless transmission of delay sensitive data generated by random sour es are investigated. A fading broad ast model in whi h the transmitter sends on dential and ommon messages to two re- eivers is onsidered. It is assumed that the ommon and on dential data, generated from Markovian sour es, is stored in buers prior to transmission, and the transmitter operates under onstraints on buer/delay violation probability. Under su h statisti- al QoS onstraints, the throughput is determined. In parti ular, se re y apa ity is used to des ribe the servi e rate of buers ontaining on dential messages. Moreover, energy e ien y is studied in the low signal-to-noise (SNR) regime. In the nal part of the thesis, throughput and energy e ien y are addressed onsidering the multiuser hannel models. Five dierent hannel models, namely, multiple a ess, broad ast, interferen e, relay and ognitive radio hannels, are onsidered. In parti ular, throughput regions of multiple-a ess fading hannels are hara terized when multiple users, experien ing random data arrivals, transmit to a ommon re eiver under statisti al QoS onstraints. Throughput regions of fading broad ast hannels with random data arrivals in the presen e of QoS requirements are studied when power ontrol is employed at the transmitter. It is assumed that superposition oding with power ontrol is performed at the transmitter with interferen e an ellation at the re eivers. Optimal power ontrol poli ies that maximize the weighted ombination of the average arrival rates are investigated in the two-user ase. Energy e ien y in two-user fading interferen e hannels is studied when the transmitters are operating subje t to QoS onstraints. Spe i ally, energy e ien y is hara - terized by determining the orresponding minimum energy per bit requirements and wideband slope regions. Furthermore, transmission over a half-duplex relay hannel with se re y and QoS onstraints is studied. Se re y throughput is derived for the half duplex two-hop fading relay system operating in the presen e of an eavesdropper. Fundamental limits on the energy e ien y of ognitive radio transmissions are analyzed in the presen e of statisti al quality of servi e (QoS) onstraints. Minimum energy per bit and wideband slope expressions are obtained in order to identify the performan e limits in terms of energy e ien y
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