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dc.contributor.authorGhorbanzadeh, Mohammaden
dc.date.accessioned2015-12-26T09:09:06Zen
dc.date.available2015-12-26T09:09:06Zen
dc.date.issued2015-12-09en
dc.identifier.othervt_gsexam:6748en
dc.identifier.urihttp://hdl.handle.net/10919/64390en
dc.description.abstractThis research addresses the concept of radio resource allocation for cellular communications systems operating in congested and contested environments with an emphasis on end-to-end quality of service (QoS). The radio resource allocation is cast under a proportional fairness formulation which translates to a convex optimization problem. Moreover, the resource allocation scheme considers subscription-based and traffic differentiation in order to meet the QoS requirements of the applications running on the user equipment in the system. The devised resource allocation scheme is realized through a centralized and a distributed architecture and solution algorithms for the aforementioned architectures is derived and implemented in the mobile devices and the base stations. The sensitivity of the resource allocation scheme to the temporal dynamics of the quantity of the users in the system is investigated. Furthermore, the sensitivity of the resource allocation scheme to the temporal dynamics in the application usage percentages is accounted for. In addition, a transmission overhead of the centralized and distributed architectures for the resource allocation schemes is performed. Furthermore, the resource allocation scheme is modified to account for a possible additive bandwidth done through spectrum sharing in congested and contested environments, in particular spectrally coexistent radar systems. The radar-spectrum additive portion is devised in a way to ensure fairness of the allocation, high bandwidth utilization, and interference avoidance. In order to justify the aforesaid modification, the interference from radar systems into the Long Term Evolution (LTE) as the predominant 4G technology is studies to confirm the possibility of the spectrum sharing. The preceding interference analysis contains a detailed simulation of radar systems, propagation path loss models, and a third generation partnership project compliant LTE system. The propagation models are Free Space Path Loss (FSPL) and Irregular Terrain Model (ITM). The LTE systems under consideration are macro cell, outdoor small cells, and indoor small cells. Furthermore, the resource allocation under channel consideration is formalized such that the resources are allocated under a congested environment and based on the quality of channel the users have in the network as well as the quality of service requirements of the applications running on the mobile devices.en
dc.format.mediumETDen
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectResource Allocationen
dc.subjectRadio Resource Blocksen
dc.subjectDiscrete Optimizationen
dc.subjectQuality of Service (QoS)en
dc.subjectSecure Auctionsen
dc.subjectLTEen
dc.subjectConvex Optimizationen
dc.subjectRadar Spectrum Sharingen
dc.subjectChannel Conditions.en
dc.titleResource Allocation and End-to-End Quality of Service for Cellular Communications Systems in Congested and Contested Environmentsen
dc.typeDissertationen
dc.contributor.departmentElectrical and Computer Engineeringen
dc.description.degreePh. D.en
thesis.degree.namePh. D.en
thesis.degree.leveldoctoralen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineElectrical Engineeringen
dc.contributor.committeechairClancy, Thomas Charles IIIen
dc.contributor.committeechairMcGwier, Robert W.en
dc.contributor.committeememberDhillon, Harpreet Singhen
dc.contributor.committeememberSilva, Luiz A.en
dc.contributor.committeememberHaghighat, Alirezaen


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