Medium Access Control in Impulse-Based Ultra Wideband Ad Hoc and Sensor Networks

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dc.contributor.authorAugust, Nathaniel J.en
dc.contributor.committeechairHa, Dong Samen
dc.contributor.committeememberArmstrong, James R.en
dc.contributor.committeememberTront, Joseph G.en
dc.contributor.committeememberLockhart, Thurmon E.en
dc.contributor.committeememberReed, Jeffrey H.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2014-03-14T20:11:43Zen
dc.date.adate2005-08-17en
dc.date.available2014-03-14T20:11:43Zen
dc.date.issued2005-05-05en
dc.date.rdate2005-08-17en
dc.date.sdate2005-05-08en
dc.description.abstractThis thesis investigates distributed medium access control (MAC) protocols custom tailored to both impulse-based ultra wideband (I-UWB) radios and to large ad hoc and sensor networks. I-UWB is an attractive radio technology for large ad hoc and sensor networks due to its robustness to multipath fading effects, sub-centimeter ranging ability, and low-cost, low-power hardware. Current medium access control (MAC) protocols for I-UWB target small wireless personal area networks (WPANs) and cellular networks, but they are not suitable for large, multihop ad hoc and sensor networks. Therefore, this paper proposes a new type of MAC protocol that enables ad hoc and sensor networks to realize the benefits of I-UWB radios. First, we propose a method to overcome the challenges of quickly, reliably, and efficiently sensing medium activity in an ultra wideband network. This provides a base MAC protocol similar to carrier sense multiple access (CSMA) in narrowband systems. Next, we propose to exploit the unique signaling of I-UWB to improve performance over the base MAC protocol without the associated overhead of similar improvements in narrowband systems. I-UWB enables a distributed multichannel MAC protocol, which improves throughput. I-UWB also facilitates a busy signal MAC protocol, which reduces wasted energy from corrupt packets. Finally, because the I-UWB Physical Layer and MAC Layer affect the network and application layers, we propose a cross-layer adaptive system that optimizes performance. Physical Layer simulations show that both the base protocol and the improvements are practical for an I-UWB radio. Networks level simulations characterize the performance of the proposed MAC protocols and compare them to existing MAC protocols.en
dc.description.degreePh. D.en
dc.identifier.otheretd-05082005-223850en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05082005-223850/en
dc.identifier.urihttp://hdl.handle.net/10919/27594en
dc.publisherVirginia Techen
dc.relation.haspartDissertation_NA_final_print.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectultra widebanden
dc.subjectcarrier senseen
dc.subjectmedium access controlen
dc.subjectbusy signalen
dc.subjectad hoc networksen
dc.subjectmulti-channelen
dc.subjectsensor networksen
dc.titleMedium Access Control in Impulse-Based Ultra Wideband Ad Hoc and Sensor Networksen
dc.typeDissertationen
thesis.degree.disciplineElectrical and Computer Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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