| Summary: | 碩士 === 國立成功大學 === 資訊工程學系碩博士班 === 93 === This thesis investigates the energy consumption of ad hoc networks and presents the optimal transmission power level in each wireless node in order to achieve objectives of quality of service (QoS) and life time extension in an ad hoc network. In general, the energy consumption in an ad hoc network is affected by three factors: the physical property of wireless nodes, the topology of network and the interference degree in each message transmission. This thesis formulates the energy consumption in terms of these factors and performs experiments in various scenarios for proving effectiveness of these formulations. According to these formulae, this thesis proposes a novel power control mechanism, Adaptive Power Control Mechanism (APCM), to evaluate the optimal transmission power level in each wireless node in order to minimize the total energy consumption that satisfy the quality of service requirement in ad hoc networks. The analyses show that up to 32 percent energy can be conserved, packet loss rate is reduced by 6 percent and the utilization of energy is enhanced to 22 percent.
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