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The defense date of the thesis is 2007-10-05
The current date is 2019-03-22
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URN etd-1005107-115000 Statistics This thesis had been viewed 2148 times. Download 17 times. Author Hsueh-sheng Huang Author's Email Address No Public. Department Computer Science and Enginerring Year 2007 Semester 1 Degree Master Type of Document Master's Thesis Language English Page Count 53 Title Impacts of Degree and Random Participation in Self-coupled Time Synchronization for Sensor Networks Keyword time synchronization wireless sensor network wireless sensor network time synchronization Abstract Wireless sensor networks are an important research area in the last few years. Collaboration among a large set of sensor nodes is required to accomplish specific tasks in such networks.
Time synchronization is a prerequisite for some applications in sensor networks. In this thesis, we evaluate the performance of the self-coupled time synchronization protocol. The basic idea is to achieve global synchronization through local pulse coupling. For example, a flock of fireflies will gradually reach synchronous flashing as observed in nature. We will discuss the effect of various network parameters such as the degree of the node and the network diameter to the performance of the self-coupled mechanism. Furthermore, we will propose an improvement over this scheme in the thesis. It reduces its message complexity by randomly turning on and off the sensor nodes for synchronization. In the related work, some protocols rely on the creation of a hierarchical structure as a platform for synchronization. We will also analyze and discuss the benefits and issues with these methods
We find that the self-coupled time synchronization protocol can achieve synchronization unless the network is sparse. It exhibits good cost-performance characteristics especially in the network environment of a great number of sensor nodes. Integrating with the proposed improvement, time synchronization can be effectively and economically reached as we will demonstrated in the thesis.
Keywords: Sensor Networks, Synchronization, Pulse Coupling, Hierarchical Structure, Degree, Synchronization Error, Topology
Advisor Committee Wei Yen - advisor
Files Date of Defense 2007-10-03 Date of Submission 2007-10-05