MARC details
| 000 -LEADER |
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| fixed length control field |
06753nam a22002537a 4500 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
210301b2017 a|||f mb|| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
EG-CaNU |
| Transcribing agency |
EG-CaNU |
| 041 0# - Language Code |
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| Language code of text |
eng |
| Language code of abstract |
eng |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER |
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| Classification number |
005 |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Doaa Mahmoud Khamis Mohammed |
| 245 1# - TITLE STATEMENT |
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| Title |
Towards throughput maximization in wireless networks : |
| Remainder of title |
cognitive radio network and cellular network with D2D transmission / |
| Statement of responsibility, etc. |
Doaa Mahmoud Khamis Mohammed |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. |
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| Date of publication, distribution, etc. |
2017 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
70 p. |
| Other physical details |
ill. |
| Dimensions |
21 cm. |
| 500 ## - GENERAL NOTE |
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| Materials specified |
Supervisor: Tamer ElBatt |
| 502 ## - Dissertation Note |
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| Dissertation type |
Thesis (M.A.)—Nile University, Egypt, 2017 . |
| 504 ## - Bibliography |
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| Bibliography |
"Includes bibliographical references" |
| 505 0# - Contents |
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| Formatted contents note |
Contents:<br/>Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1<br/>1.1 Literature Review . . . . . . . . . . . . . . . . . . . . . . . . . . . 1<br/>1.2 Motivation and Contributions . . . . . . . . . . . . . . . . . . . . . 5<br/>2. Cognitive Radio Networks with a Dedicated Relay: Throughput and Delay<br/>Trade-offs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8<br/>2.1 System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8<br/>2.2 CRN with a Dedicated Relay under Perfect Sensing . . . . . . . . . 10<br/>2.2.1 The arrival and service rates . . . . . . . . . . . . . . . . . 11<br/>2.2.2 Lower and upper bounds on the arrival and service rates . . 13<br/>2.2.3 Upper and lower bounds on the stability region . . . . . . . 14<br/>2.3 CRN with a Dedicated Relay under Random Access Protocol . . . 16<br/>2.3.1 The arrival and service rates . . . . . . . . . . . . . . . . . 17<br/>2.3.2 Lower and upper bounds on the arrival and service rates . . 19<br/>2.3.3 Upper and lower bounds on the stability region . . . . . . . 21<br/>2.4 Baseline Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21<br/>2.4.1 No-relaying System . . . . . . . . . . . . . . . . . . . . . . . 22<br/>2.4.2 Cooperative system where the SU acts as a relay . . . . . . 23<br/>viii<br/>2.5 Numerical Results . . . . . . . . . . . . . . . . . . . . . . . . . . . 25<br/>2.5.1 Stability Regions Comparisons . . . . . . . . . . . . . . . . 25<br/>2.5.2 Average PU and SU Delays Under Perfect Sensing . . . . . 29<br/>2.5.3 Average PU and SU Delays Under Random Access . . . . . 34<br/>2.5.4 Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38<br/>3. Cooperative D2D Communications in the Uplink of Cellular Networks<br/>with Time and Power Division . . . . . . . . . . . . . . . . . . . . . . . . 40<br/>3.1 System model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40<br/>3.2 Queueing Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 42<br/>3.2.1 Average service rate of QCUE . . . . . . . . . . . . . . . . . 43<br/>3.2.2 Average service rate of QDT . . . . . . . . . . . . . . . . . . 44<br/>3.2.3 Average arrival and service rates of QDC . . . . . . . . . . . 46<br/>3.2.4 Problem Formulation . . . . . . . . . . . . . . . . . . . . . . 47<br/>3.3 Numerical Results . . . . . . . . . . . . . . . . . . . . . . . . . . . 47<br/>4. Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53<br/>Bibliography . . . . . . . |
| 520 3# - Abstract |
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| Abstract |
Abstract:<br/>In this work, we explore the best achievable throughput for two different wireless<br/>networks. First, we characterize the stable throughput for the secondary user in<br/>cognitive radio networks (CRN). Second, we investigate the case of device to device<br/>(D2D) pair overlaying a cellular network in the uplink, where we optimize the division<br/>of the power and time between the D2D and the cellular transmissions.<br/>In the first part of this work, we characterize the stability region and quantify<br/>the average packet delay for cognitive radio networks with a dedicated relay node,<br/>under two different MAC protocols: perfect sensing and random access. We compare<br/>the performance of our dedicated relay system to two baseline systems, namely norelaying<br/>and secondary user-relaying. Our numerical results reveal that in terms of<br/>the achievable stable throughput, the dedicated relay system outperforms the norelaying<br/>system under the random access protocol. However, this is not the case<br/>in the perfect sensing protocol as the performance of the dedicated relay system<br/>compared to the no-relaying system depends on the primary user’s packet arrival<br/>rate. Moreover, the secondary user-relaying system outperforms the dedicated relay<br/>system. Nevertheless, the secondary user-relaying system has its own challenges in<br/>terms of the standards allowing cooperation with the primary user in addition to the<br/>security and privacy issues involved. In case of random access, delay simulations show<br/>that our dedicated relay system has better primary user delay performance than the<br/>iv<br/>baseline systems at low arrival rates of the primary user packets. On the other hand,<br/>at high arrival rates, the no-relaying system outperforms our dedicated relay system.<br/>In case of perfect sensing and low channel access probabilities, our dedicated relay<br/>system outperforms the no-relaying system due to the merits of cooperation. However,<br/>the high probability of collision dominates as the access probabilities increase, thus,<br/>the no-relaying system starts to have some performance gains.<br/>In the second part of this work, we reflect on cooperative D2D communications as<br/>a promising technology to improve the spectral efficiency in crowded communication<br/>networks. We consider a transmitter-receiver pair, operating in the D2D transmission<br/>mode, overlaying the cellular network. The D2D transmitter (DT) acts as a relay for<br/>the undelivered packets of the cellular user equipment (CUE). We consider the case<br/>in which the DT transmits its own data along with the CUE relayed data using<br/>superposition coding in the uplink. We investigate how the time slot is split between<br/>the cellular network transmission and the D2D transmission. Moreover, the optimal<br/>approach to split the DT power between the transmission of the DT data and the<br/>relayed CUE data is explored. Our main objective is to achieve the the maximum<br/>D2D throughput. Towards this objective, we describe the system using a queuing<br/>theoretic model and formulate an optimization problem to maximize the throughput<br/>of the D2D link by allocating time and power for DT while satisfying the stability<br/>conditions for the queues of the system. Finally, numerical results show the merits of<br/>our system, with optimal time and power allocation, as compared to the constant time<br/>or power allocation scenarios, in terms of the maximum achievable D2D throughput. |
| 546 ## - Language Note |
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| Language Note |
Text in English, abstracts in English. |
| 650 #4 - Subject |
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| Subject |
Wireless Technologies |
| 655 #7 - Index Term-Genre/Form |
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| Source of term |
NULIB |
| focus term |
Dissertation, Academic |
| 690 ## - Subject |
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| School |
Wireless Technologies |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Thesis |
| 650 #4 - Subject |
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| -- |
327 |
| 655 #7 - Index Term-Genre/Form |
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| -- |
187 |
| 690 ## - Subject |
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| -- |
327 |