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Wireless sensor networks (WSN) are widely used for environmental monitoring, healthcare, and surveillance. Their lifetime is strongly affected by energy consumption, which is partly attributed to retransmission. However, retransmission problems have not been well studied in the area of deployment optimization considering lifetime for WSN. In this paper, important models for lifetime, sensor failure,...
In recent years, with the developments of wireless sensor networks technology, how to prolong the lifetime of WSN and reduce energy consumption by the sensor nodes becomes a hot topic. This article analyzes the mechanism of clustering in LEACH protocol and presents improved approaches based on energy of sensor node and the distance between the node and the base satation, then compares their performances...
One of the primary mechanisms to mitigate idling energy consumption and reduce communication activities in Wireless Sensor Networks (WSNs) is to put nodes to low duty cycle operation as long as possible. Keeping a small time window (the listen period) is a challenging task, and thus requires appropriate tailoring of duty cycle so as not to compromise network performance. In this work, we explore an...
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