Experimental Performance Evaluation of Bit-Rate Selection Algorithms in Multi-Vehicular Networks

dc.contributor.authorSon, Giyeong
dc.date.accessioned2011-01-24T20:56:40Z
dc.date.available2011-01-24T20:56:40Z
dc.date.issued2011-01-24T20:56:40Z
dc.date.submitted2011-01-21
dc.description.abstractIEEE 802.11 PHY supports multiple transmission rates according to multiple different modulations and coding schemes. Each WiFi station selects its own transmission rate according to its own algorithm; in particular, the IEEE 802.11 standards do not specify the bit-rate selection method. Although many adaptive bit-rate selection algorithms have been proposed, there is limited research and evaluation on the performance of such algorithms for roadside networks, especially in cases with multi-vehicle roadside multi-vehicular WiFi networks. In this thesis we propose an opportunistic highest bit-rate algorithm, Opportunistic Highest Bit-Rate Multi-Vehicular WiFi Networks (OHBR-MVN), specifically for roadside multi-vehicular WiFi networks. Our proposal is based on three key characteristics of such networks: (1) vehicles will drive closer to, and eventually pass, the roadside WiFi station, experiencing a progressively better transmission environment; (2) the vast majority of data transmitted in single-vehicle drive-by downloading scenarios occurs at the maximum transmission rate; (3) vehicles that transmit at less than the maximum rate do so at the expense of those that could send more data at a higher transmission rate. We therefore believe that transmitting only at the highest possible bit-rate is the preferred algorithm for such networks. Further, this approach keeps the bit-rate selection extremely simple, avoiding the complexity and resulting problems of adaptive approaches. Through a series of experiments that compare the throughput of both fixed and adaptive bit-rate selection algorithms we show that our approach yields both higher throughput and better fairness characteristics, while being significantly simple, and thus more robust.en
dc.identifier.urihttp://hdl.handle.net/10012/5774
dc.language.isoenen
dc.pendingfalseen
dc.publisherUniversity of Waterlooen
dc.subject802.11en
dc.subjectwireless performanceen
dc.subjectdelay-tolerant networken
dc.subjectdrive-by downloadingen
dc.subject.programElectrical and Computer Engineeringen
dc.titleExperimental Performance Evaluation of Bit-Rate Selection Algorithms in Multi-Vehicular Networksen
dc.typeMaster Thesisen
uws-etd.degreeMaster of Applied Scienceen
uws-etd.degree.departmentElectrical and Computer Engineeringen
uws.peerReviewStatusUnrevieweden
uws.scholarLevelGraduateen
uws.typeOfResourceTexten

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