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http://dx.doi.org/10.6109/jkiice.2010.14.12.2811

QoS Aware Cross-layer MAC Protocol in wireless Sensor Networks  

Park, Hyun-Joo (상명대학교 컴퓨터과학과)
Kim, Seong-Cheol (상명대학교 컴퓨터과학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.14, no.12, 2010 , pp. 2811-2817 More about this Journal
Abstract
In this paper we propose the QAC-MAC that supports Quality of Service(QoS) and saves energy resources of the sensor node, and hence prolonging the lifetime of the sensor network with multiple sink nodes. Generally, the nodes nearest to the sink node often experience heavy congestion since all data is forwarded toward the sink through those nodes. So this critically effects on the delay-constraint data traffics. QAC-MAC uses a hybrid mechanism that adapts scheduled scheme for medium access and scheduling and unscheduled scheme based on TDMA for no data collision transmission. Generally speaking, characteristics of the real-time traffic with higher priority tends to be bursty and has same destination. QAC-MAC adapts cross-layer concept to rearrange the data transmission order in each sensor node's queue, saves energy consumption by allowing few nodes in data transmission, and prolongs the network lifetime.
Keywords
TDMA(Time Division Multiple Access); WSNs(Wireless Sensor Networks); QoS(Quality of Service); MAC(Multiple Access Control);
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