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Wireless sensor networks utilize large numbers of wireless sensor nodes to collect information from their sensing terrain. Wireless sensor nodes are battery-powered devices. Energy saving is always crucial to the lifetime of a wireless sensor network. Recently, many algorithms are proposed to tackle the energy saving problem in wireless sensor networks. In these algorithms, however, data collection...
The well known many–to–one data routingparadigm [1] in wireless sensor networks (WSNs) demands non–uniform medium access and forwarding strategy to achieve theultimate node level fairness. Since nodes closer to the sink havemore traffic than that of far–away nodes, close–by nodes needto employ different frequency of media access and forwardingprobability such that sink receives almost equal number...
Wireless sensor data collected under real world conditions can contain a variety of errors and inconsistencies that can affect pattern recognition algorithms. We describea nainodotve method for correcting wireless sensor data collectedvia non-real-time platforms and visualize the results usingwireless accelerometer data.
ZigBee is a kind of low rate, low cost and low power technology to be used in cheap, fixed, portable and mobile devices in wireless personal network. In ZigBee mesh network, the routing algorithms about the two kinds of nodes RN+ and RN- have been studied in this paper. With the increasing number of RN- in the total routers, the packet delivery ratios decrease slowly, but the difference is smaller;...
Wireless Mesh Networks (WMNs) support the cost-effective broadband access for Internet users. Although today's IEEE 802.11 PHY and MAC specifications provide multi-channel and multi-rate capabilities, exploiting available channels and data rates is a critical issue to guarantee high network performance. In multi-rate wireless networks, high-rate links heavily suffer from performance degradation due...
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