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The proposed intelligent context-aggregation agent (ICAA) can adapt to environmental contexts and effectively suppress transmission redundancies, increasing energy effectiveness and prolonging a network's lifetime.
A wireless ECG detection system with a low-power analog front-end (LPAF) circuit and a Bio-processing ZigBee (BioZigbee) firmware is presented in this paper. The LPAF circuit comprises an ECG signal acquisition board and a low-pass filter to capture and filter the physical ECG signals from the human body. The low-pass filter in the proposed LPAF circuit is fabricated using the 0.18 μm TSMC CMOS process...
Sensor networks inherit unique technical challenges such as limited battery capacity and very primitive computing capabilities. To prolong the lifetime of the wireless sensor networks, energy efficiency is one of the most critical issues. Many routing protocols are developed to address this issue from different aspects. Related routing protocols can be classified into three categories: data-centric,...
Many energy efficient routing protocols have been proposed in sensor networks for different scenarios and various applications in literature. One of the efficient way is to group sensors in the neighboring into clusters and send aggregate data by a designated cluster head. However, such design discipline still can not balance the energy consumption of the entire network. As such, in worst cases, some...
Home sensor nodes are devices embedded in home appliances and are designed to sense environments, to process collected information, to perform a specific task, and to cooperate with other units. The advances of VLSI technologies and wireless sensor networks (WSN) turn the inspirational idea of intelligent home appliances into reality. In this paper, we focus on a category of home appliances, Smart...
The distribution of nodes in wireless sensor networks are asymmetrical due to them broadcasted randomly. This situation affects the performance of networks. The power control technology of clusterheads is needed to optimize the framework of networks. Therefore we present an approach of fuzzy adaptive power control about clusterheads based on PID (Proportional, Integral and Differential) algorithm...
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