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In order to improve the reliability of gas monitoring in coal mine, we design a wireless sensor networks with the piezoelectric gas sensors, The wireless sensor networks is suitable for gas monitoring in the severe environment of coal mine. The networks' topology is sub-cluster type, and the cluster head node is selected in competitive method. Data fusion and routing of the cluster nodes are controlled...
A particular challenge in maintaining extended wireless sensor networks (WSNs) lifetime lies in achieving communications with low power. For better understanding of the design trade offs of WSNs, a more accurate power consumption model for wireless sensor node is proposed. Different from models ever showed, in which the power consumption of each component in WSN node is assumed constant, the new one...
This paper presents the design and implementation of a remote monitoring and control system based on the cdma2000 IX technology. Nowadays cdma2000 IX system has added a series of packet equipment to construct the packet network and provide high speed packet data services. The packet network can provide two kinds of Internet accesses: simple IP and mobile IP. The paper adopts the mobile IP technology...
Different from the traditional wireless networks, in wireless sensor networks(WSNs), power consumption is a critical aspect, because current nodes are always supported by constrainedenergy battery. A particular challenge in maintaining extended battery lifetime lies in achieving communications with low power. For better understanding of the design trade offs of WSNs, a more accurate power consumption...
Low-power design is one of the most important issues in wireless sensor networks (WSNs), while reliable information transmitting should be ensured as well. Transmitting power (TP) control is a simple method to make the power consumption down, but excessive interferences from potential adjacent operating links and communication reliability between nodes should be considered. In this paper, a reliable...
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