| Summary: | 碩士 === 真理大學 === 數理科學研究所 === 94 === In wireless sensor network protocols, energy efficiency and full sensing coverage are two important research issues. To prolong the lifetime of network operation, a large number of sensors are randomly deployed in a target area. In case all sensors operate simultaneously, the network will encounter serious collision problem and consume lots of energy. On the contrary, if only small number of sensors operate in a network, there may be some coverage holes exist in the target area. To solve these problems, a hierarchical cellular network architecture constructed based on location information is proposed in this paper, so that the objectives of both low power consumption and full sensing coverage can be achieved. In the proposed network architecture, advantages of intra-cell operations include low power consumption, load balance, and full sensing coverage within each cell. In applications of event detection and periodical report, the proposed inter-cell routing protocol has advantages of low transmission latency and low power consumption due to proper data aggregation operation. According to the simulation results, the proposed protocol outperforms GAF in terms of overall power consumption and transmission latency.
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