(An) energy-efficient and low-latency duty cycle MAC protocol for wireless sensor networks = 센서 네트워크를 위한 듀티 사이클 맥 프로토콜에 관한 연구

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As an advance in wireless communication and electronics technology has enabled the development of low-cost sensor nodes, wireless sensor networks have been pervasive in a variety of applications. A wireless sensor networks(WSNs) consist of a large number of spatially distributed autonomous devices using sensor to cooperatively monitor physical or environmental conditions at different locations. The sensor node has abilities to sense an interesting event, process data, and communicate with each other through a wireless channel and is powered by a limited battery power. One of the most critical issues on WSNs is efficient energy consumption. In most application scenarios, the replacement of the battery might be impossible due to a large number of sensor nodes and the difficulty of accessing the sensing area, so the lifetime of the sensor node shows the strong dependence on the battery life. Especially, the battery power in the sensor node is mostly consumed by the radio module. One of the largest sources of energy consumption in wireless node is idle listening which is listening the channel while nothing is transmitted. Over 50% of the energy consumption for receiving is consumed for idle listening. The \emph{idle:receive:send} ratios are measured as $1:1.05:1.4$. Unlike the conventional wireless networks, a typical sensor network application usually generates very light traffic on the network. Thus, sensor nodes mostly waste their energy power on idle listening. In order to reduce the energy consumption caused by idle listening, duty-cycle MAC protocols have been proposed for WSNs. In duty cycling, each node periodically alternates between an active state and a sleep state while turning on and off the transceiver. These protocols successfully diminish the energy consumption, but introduce significant end-to-end delivery latency because in a single duty-cycle operation, a packet is able to be forwarded over a single hop only. RMAC was proposed to handle the l...
Yoon, Hyun-Sooresearcher윤현수researcher
한국과학기술원 : 전산학과,
Issue Date
455437/325007  / 020045011

학위논문(박사) - 한국과학기술원 : 전산학과, 2010.08, [ viii, 59 p. ]


Duty Cycle MAC; Wireless Sensor Networks; Medium Access Control; 듀티 사이클 맥; 무선 센서네트워크; Low Latency; Energy Efficiency

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