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dc.contributor.authorYang, Xuen_US
dc.date.accessioned2014-03-14T20:21:11Z
dc.date.available2014-03-14T20:21:11Z
dc.date.issued2007-11-26en_US
dc.identifier.otheretd-12272007-100902en_US
dc.identifier.urihttp://hdl.handle.net/10919/30270
dc.description.abstractTo support wireless-oriented services, a new generation of Web services called Mobile services (M-services) has emerged. M-services provide mobile users access to services through wireless networks. One of the important issues in M-service environment is how to discover and access M-services efficiently. In this dissertation, we propose time and power efficient access methods for M-services. We focus on methods for accessing broadcast based M-services from multiple wireless channels. We first discuss efficient access methods in data-oriented wireless broadcast systems. We then discuss how to extend current wireless broadcast systems to support simple M-services. We present a novel infrastructure that provides a multi-channel broadcast framework for mobile users to effectively discover and access composite M-services. Multi-channel algorithms are proposed for efficiently accessing composite services. We define a few semantics that have impact on access efficiency in the proposed infrastructure. We discuss semantic access to composite services. Broadcast channel organizations suitable for discovering and accessing composite services are proposed. We also derive analytical models for these channel organizations. To provide practical study for the proposed infrastructure and access methods, a testbed is developed for simulating accessing M-services in a broadcast-based environment. Extensive experiments have been conducted to study the proposed access methods and broadcast channel organizations. The experimental results are presented and discussed.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartxuyang.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectWireless Accessen_US
dc.subjectBroadcasten_US
dc.subjectSemantic Accessen_US
dc.subjectMobile Web Servicesen_US
dc.titleMulti-channel Mobile Access to Web Servicesen_US
dc.typeDissertationen_US
dc.contributor.departmentComputer Scienceen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineComputer Scienceen_US
dc.contributor.committeechairGracanin, Denisen_US
dc.contributor.committeememberLu, Chang-Tienen_US
dc.contributor.committeememberChen, Ing-Rayen_US
dc.contributor.committeememberBarkhi, Rezaen_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12272007-100902/en_US
dc.contributor.committeecochairBouguettaya, Athmanen_US
dc.date.sdate2007-12-27en_US
dc.date.rdate2008-01-04
dc.date.adate2008-01-04en_US


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