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This dissertation, Bluetooth Network Design by Changlei, Liu, 劉長雷, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled Bluetooth Network Design Submitted by Changlei Liu for the degree of Master of Philosophy at the University of Hong Kong in August 2003 In recent years, the search for a convenient mobile communication system and a low-cost low-power connection for electronic devices has fueled the development of Bluetooth, a fast frequency hopping Time Division Duplex (TDD) wireless system. This thesis focus on Bluetooth network design and is organizing into three parts dealing respectively with packet scheduling, multihop device discovery, and scatternet formation. The insights gained in each of these areas are summarized below. Within a Bluetooth piconet, data exchange is master-driven. Channel utilization depends on the efficiency of the scheduling algorithm adopted by the master. An efficient intra-piconet scheduling algorithm based on a novel buffer tracking technique called Floating Threshold (FT) is proposed and analyzed. Unlike existing approaches, FT allows the master to estimate the backlog queue status at each slave accurately based only on a single feedback bit and a floating threshold. For a Bluetooth scatternet, the efficiency of data exchange is determined by the coordination of both intra-piconet scheduling and inter-piconet scheduling. Two new traffic adaptive scheduling algorithms are proposed to ease inter-piconet communications. Simulation results show that both algorithms perform better than possible alternative solutions. Device discovery in Bluetooth multi-hopped environments is a prerequisite to scatternet formation. Unlike many existing approaches, our proposed solutions are fully compliant with the current Bluetooth Specification 1.2. Three symmetric link models are explored, with the aim of producing autonomous point-to-point links. To automate the multihop device discovery, three original methods running on top of the symmetric link model are proposed. A comprehensive comparative study of all 9 variants of the device discovery algorithm is then carried out using an extension of Bluehoc simulator. With the proximity awareness achieved at the phase of device discovery, a scatternet can be constructed in a distributed fashion. A random scatternet formation (RSF) protocol together with two optimization rules is designed. Due to the integration of the device discovery and scatternet formation, RSF can yield a relatively short topology construction delay than existing solutions. The optimization rules introduced can further help to remove the arbitrariness of the scatternet formed by RSF. This ensures a stable performance in different scenarios. DOI: 10.5353/th_b2918863 Subjects: Bluetooth technologyComputer network protocols

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