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Wireless Sensor Networks (WSNs) typically aggregate sensed events into a sink by Continuous Monitoring (CM) or Event-Detection (ED). Cluster heads receiving and sending aggregated data have a difficulty in maintaining traditional cluster-based WSNs due to the energy hole problem, which leads to faster energy depletion around the sink. This paper shows how reporting frequency to the sink can be controlled...
Coverage is a vital issue that ensures that basic functions are available in wireless sensor networks (WSNs). These functions provide communications during emergency rescue or in war environments. Sensor nodes must be dispersed and survive in place for a long time in order to accurately monitor all events. However, sensor nodes rely on limited battery energy restricted to the lifetime of the entire...
In a typical cluster-based sensor network, the data is usually gathered and fused on cluster heads. In target tracking applications, a target is often detected by sensor nodes in multiple clusters, leading to redundant data transmissions through multiple paths from the cluster heads to the data sink. To reduce such redundant data transmissions and thus to save energy, this paper proposes an adaptive...
In this paper the power consumption possible combinations for a number of loads and a single power source are discussed. The proposed mathematical model depends basically on combinatorics to estimate how many ways are possible to operate different loads powered by a single power source. This paper takes into consideration the different conditions and limitations to operate n number of loads limited...
The high energy consumption in the local network often leads to energy hole problem in wireless sensor networks (WSNs), It easy to make the WSNs dying prematurely. The effective way is the evenness of energy consumption of each node. Unlike other existed schemes, we sliced the circular field into concentric circular bands of fixed width. By combining the direct transmission protocol and hop-by-hop...
Energy consumption is one of the most important issues to the wireless sensor network, which determines the network lifetime. The non-uniform property of energy consumption is studied in this paper. Theoretical analysis indicates that the average energy consumption of the sensor is heavy non-uniform, which decrease with the hop number to the sink node (or the sensor belongs to the high level in a...
In wireless sensor networks (WSN) data transmission is usually performed by sensors in manner of multi-hop forwarding towards a central static control center (sink). A lot of cheap, low-powered and energy-limited sensors are deployed in the monitored area and some of these nodes closer to the sink node use up their energy more quickly than other nodes because they relay more packets. Although most...
In this paper we study the effectiveness of two power gating methods - transistor switches and MEMS switches - in reducing the power consumption of a design with a certain target throughput. Transistor switches are simple, but have fundamental limitations in their effectiveness. MEMS switches, with zero leakage in the off state, have achieved much focus over the past decade in the RF field, but have...
Wireless sensor networks (WSNs) are widely used in detecting, locating and tracking the moving objects. However, some of the cheap, low-powered and energy-limited sensors that are deployed in large areas may use up their energy, which leads to the whole network failure finally. In order to reduce the energy consumption and prolong the network lifetime, (a) a new light-weight and energy-efficient locating...
A study of localization techniques in the wireless sensor network are a subject of the many research team in the world. Most of the solutions propose the optimization in term of the accuracy of the coordinate's assignment improvement. However, the other very important metric considering the energy cost of the localization process also exists, but nowadays there is a lack of this work regarding to...
Recent developments in the field of wireless sensor networks (WSN's) have rapidly positioned this technology as the premier form of variable monitoring. These types of networks maintain important advantages in their field of operation such as reliability, simplicity and ease of installation. However, regardless of these advantages, WSNs face challenges in power consumption. The RF transceiver, the...
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