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dc.contributor.authorKhayyat, Ahmad
dc.contributor.otherQueen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.))en
dc.date2007-10-22 12:55:29.889en
dc.date2007-10-25 14:55:36.811en
dc.date.accessioned2007-10-26T19:18:43Z
dc.date.available2007-10-26T19:18:43Z
dc.date.issued2007-10-26T19:18:43Z
dc.identifier.urihttp://hdl.handle.net/1974/886
dc.descriptionThesis (Master, Electrical & Computer Engineering) -- Queen's University, 2007-10-25 14:55:36.811en
dc.description.abstractThe IEEE 802.15.4 standard is a low-power, low-rate MAC/PHY standard that meets most of the stringent requirements of single-hop wireless sensor networks. Sensor networks with nodal populations comprised of thousands of devices have been envisioned in conjunction with environmental, vehicular, and military applications, to mention a few. However, such large sensor network deployments necessitate multi-hop support as well as low power consumption. In light of the standard's extremely limited joint support of the two aforementioned attributes, this thesis presents two essential contributions. First, a framework is proposed to implement a new IEEE 802.15.4 operating mode, namely the synchronized peer-to-peer mode. This mode is designed to enable the standard's low-power features in peer-to-peer multi-hop-ready topologies. The second contribution is a distributed Guaranteed Time Slot (dGTS ) management scheme designed to function in the newly devised network mode. This protocol provides reliable contention-free access in peer-to-peer topologies in a completely distributed manner. Assuming optimal routing, our simulation experiments reveal perfect delivery ratios as long as the traffic load does not reach or surpass its saturation threshold. dGTS sustains at least twice the delivery ratio of contention access under sub-optimal dynamic routing. Moreover, the dGTS scheme exhibits minimum power consumption by eliminating the retransmissions attributed to contention, which in turn reduces the number of transmissions to a minimum.en
dc.format.extent1844951 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoengen_US
dc.relation.ispartofseriesCanadian thesesen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectIEEE 802.15.4en
dc.subjectMedium Access Control (MAC)en
dc.subjectPeer-to-peer (P2P)en
dc.subjectContention-free accessen
dc.subjectWireless sensor networks (WSN)en
dc.subjectSynchronizationen
dc.subjectDistributed reservationen
dc.subjectMulti-hopen
dc.titleDistributed Contention-Free Access for Multi-hop IEEE 802.15.4 Wireless Sensor Networksen
dc.typethesisen
dc.description.degreeMasteren
dc.contributor.supervisorSafwat, Ahmeden
dc.contributor.departmentElectrical and Computer Engineeringen


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