Distributed Protocols for Signal-Scale Cooperation

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dc.contributor.advisorSabharwal, Ashutoshen_US
dc.creatorHunter, Christopher R.en_US
dc.date.accessioned2013-03-08T00:34:36Zen_US
dc.date.available2013-03-08T00:34:36Zen_US
dc.date.issued2012en_US
dc.description.abstractSignal-scale cooperation is a class of techniques designed to harness the same gains offered by multi-antenna communication in scenarios where devices are too small to contain an array of antennas. While the potential improvements in reliability at the physical layer are well known, three key challenges must be addressed to harness these gains at the medium access layer: (a) the distributed synchronization and coordination of devices to enable cooperative behavior, (b) the conservation of energy for devices cooperating to help others, and (c) the management of increased inter-device interference caused by multiple spatially separate transmissions in a cooperative network. In this thesis, we offer three contributions that respectively answer the above three challenges. First, we present two novel cooperative medium access control protocols: Distributed On-demand Cooperation (DOC) and Power-controlled Distributed On-demand Cooperation (PDOC). These protocols utilize negative acknowledgments to synchronize and trigger cooperative relay transmissions in a completely distributed manner. Furthermore, they avoid cooperative transmissions that would likely be unhelpful to the source of the traffic. Second, we present an energy conservation algorithm known as Distributed Energy-Conserving Cooperation (DECC). DECC allows devices to alter their cooperative behavior based on measured changes to their own energy efficiency. With DECC, devices become self-aware of the impact of signal-scale cooperation -- they explicitly monitor their own performance and scale the degree to which they cooperate with others accordingly. Third and finally, we present a series of protocols to combat the challenge of inter-device interference. Whereas energy efficiency can be addressed by a self-aware device monitoring its own performance, inter-device interference requires devices with network awareness that understand the impact of their behavior on the devices around them. We investigate and quantify the impact of incomplete network awareness by proposing a modeling approximation to derive relaying policy behaviors. We then map these policies to protocols for wireless channels.en_US
dc.format.extent137 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS E.E. 2012 HUNTERen_US
dc.identifier.citationHunter, Christopher R.. "Distributed Protocols for Signal-Scale Cooperation." (2012) Diss., Rice University. <a href="https://hdl.handle.net/1911/70270">https://hdl.handle.net/1911/70270</a>.en_US
dc.identifier.digitalHunterCen_US
dc.identifier.urihttps://hdl.handle.net/1911/70270en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectApplied sciencesen_US
dc.subjectDistributed synchronizationen_US
dc.subjectSignal-scale cooperationen_US
dc.subjectMulti-antenna communicationen_US
dc.subjectCooperative networksen_US
dc.subjectEnergy conservationen_US
dc.subjectElectrical engineeringen_US
dc.titleDistributed Protocols for Signal-Scale Cooperationen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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