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dc.contributor.advisorEager, Dereken_US
dc.creatorYang, Bofuen_US
dc.date.accessioned2010-06-12T11:56:17Zen_US
dc.date.accessioned2013-01-04T04:37:44Z
dc.date.available2011-06-21T08:00:00Zen_US
dc.date.available2013-01-04T04:37:44Z
dc.date.created2010-05en_US
dc.date.issued2010-05en_US
dc.date.submittedMay 2010en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-06122010-115617en_US
dc.description.abstractWireless sensor networks (WSN) have generated tremendous interest among researchers these years because of their potential usage in a wide variety of applications. Sensor nodes are inexpensive portable devices with limited processing power and energy resources. Sensor nodes can be used to collect information from the environment, locally process this data and transmit the sensed data back to the user. This thesis proposes a new reliable data delivery protocol for general point-to-point data delivery (unicasting) in wireless sensor networks. The new protocol is designed that aims at providing 100% reliability when possible as well as minimizing overhead and network delay. The design of the new protocol includes three components. The new protocol adopts a NACK-based hop-by-hop loss detection and recovery scheme using end-to-end sequence numbers. In order to solve the single/last packet problem in the NACK-based approach, a hybrid ACK/NACK scheme is proposed where an ACK-based approach is used as a supplement to the NACK-based approach to solve the single/last packet problem. The proposed protocol also has a new queue management scheme that gives priority to new data. By introducing the idea of a Ready_Bit and newer packet first rule in the transmission queue, nodes can detect and recover lost packets in parallel with the normal data transmission process. The performance of the new protocol is tested in a Crossbow MicaZ testbed. Experimental results show that the new protocol performs well under various system and protocol parameter settings.en_US
dc.language.isoen_USen_US
dc.subjectReliabilityen_US
dc.subjectNACKen_US
dc.subjectReliable Data Deliveryen_US
dc.subjectWireless Sensor Networksen_US
dc.titleReliable data delivery in wireless sensor networksen_US
thesis.degree.departmentComputer Scienceen_US
thesis.degree.disciplineComputer Scienceen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M.Sc.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberDeters, Ralphen_US
dc.contributor.committeeMemberChen, Lien_US
dc.contributor.committeeMemberMakaroff, Dwighten_US


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