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Recently, radio frequency energy transfer (RFET) attracts more and more interests for powering sensor nodes in the wireless sensor network (WSN). In the conventional WSN where sensor nodes are powered by a small battery with finite amount of energy, reducing energy consumption of sensor nodes is of primary importance. On the contrary, in the WSN with RFET, since energy can be continuously supplied...
Activity recognition in pervasive environments relies often on many different sensors. Low-level data streams from these sensors are combined at the decision level at a sink. A key challenge is to efficiently and with high accuracy recognise the objects activities based on low-level sensor data. There is a trade-off between obtaining the required accuracy of activity recognition and the energy consumption...
The quantized measurement fusion problem for target tracking in wireless sensor networks (WSNs) is investigated. Due to the limited energy and bandwidth, each activated node quantizes and then transmits the local measurements by probabilistic quantization strategy. The fusion center (FC) estimates the target state in a dimension compression way instead of merging all the quantized messages to a vector...
Coverage is one fundamental problem in wireless sensor networks, it reflects how well an area is monitored or surveyed by sensors. Some applications require a high degree of coverage as it would want a region to be monitored by multiple nodes simultaneously. Nevertheless, the failure of one or several sensors, can paralysis the area coverage unless it was before completely covered.In this paper we...
This paper studies time division multiple access (TDMA) scheduling with both energy efficiency and optimized delay in clustered wireless sensor networks (WSNs). To achieve this goal, we first build a cross-layer optimization model for attaining network wide efficient energy consumption. We solve this model by transforming it into simpler sub-problems that can be solved using conventional methods....
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