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dc.contributor.advisorMiller, Scott L.en_US
dc.creatorXiong, Yunlien_US
dc.date.accessioned2005-08-29T14:38:57Z
dc.date.available2005-08-29T14:38:57Z
dc.date.created2006-05en_US
dc.date.issued2005-08-29
dc.identifier.urihttp://hdl.handle.net/1969.1/2331
dc.description.abstractIn wireless sensor networks (WSN), nodes have very limited power due to hardware constraints. Packet losses and retransmissions resulting from congestion cost precious energy and shorten the lifetime of sensor nodes. This problem motivates the need for congestion control mechanisms in WSN. In this thesis, an observation of multiple non-empty queues in sensor networks is first reported. Other aspects affected by congestion like queue length, delay and packet loss are also studied. The simulation results show that the number of occupied queues along a path can be used to detect congestion. Based on the above result, a congestion control scheme for the transport layer is proposed in this thesis. It is composed of three parts: (i) congestion detection by tracking the number of non-empty queues; (ii) On-demand midway non-binary explicit congestion notification (CN) feedback; and (iii) Adaptive rate control based on additive increase and multiplicative decrease (AIMD). This scheme has been implemented in ns2. Extensive simulations have been conducted to evaluate it. Results show that it works well in mitigating and avoiding congestion and achieves good performance in terms of energy dissipation, latency and transmission effciency.en_US
dc.format.extent298931 bytes
dc.format.mediumelectronicen_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherTexas A&M Universityen_US
dc.subjectSensor Networksen_US
dc.subjectCongestion Controlen_US
dc.titleA congestion control scheme for wireless sensor networksen_US
dc.typeBooken
dc.typeThesisen
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineVocational Educationen_US
thesis.degree.grantorTexas A&M Universityen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelMastersen_US
dc.contributor.committeeMemberKundur, Deepaen_US
dc.contributor.committeeMemberReddy, Narasimhaen_US
dc.contributor.committeeMemberWelch, Jennifer L.en_US
dc.type.genreElectronic Thesisen_US
dc.type.materialtexten_US
dc.format.digitalOriginborn digitalen_US


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