| Summary: | 碩士 === 國立東華大學 === 資訊工程學系 === 94 === Recent advances in hardware and wireless communication technologies have designed low-cost, low-power and multifunctional sensor devices. These hundreds or thousands of sensor nodes are spread across a geographical area to monitor ambient condition such astemperature, sound and light. These sensor nodes cooperate with each other to establish a sensing network that can provide access to surrounding information anytime, anywhere.
Wireless sensor network has been adopted in various applications (e.g., health, security factory automation, home application, traffic surveillance, commercial applications).
These sensor nodes are typically restricted by energy, storage capacity and computing ability. They have finite energy supplied by batteries which can not be recharged owing to the scale of sensor network. Therefore, reducing power consumption is a critical issue in sensor networks. The power consumption in wireless sensor networks can be
categorized into two parts: communication and computation. Communication is the major consumer of power. A good security cryptographic schemes and defend attack can
reduce the power consumption of communication and prolong the lifetime of sensor network.
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