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Full-Text Articles in Physical Sciences and Mathematics
Energy-Efficient Data Management In Wireless Sensor Networks, Chunyu Ai
Energy-Efficient Data Management In Wireless Sensor Networks, Chunyu Ai
Computer Science Dissertations
Wireless Sensor Networks (WSNs) are deployed widely for various applications. A variety of useful data are generated by these deployments. Since WSNs have limited resources and unreliable communication links, traditional data management techniques are not suitable. Therefore, designing effective data management techniques for WSNs becomes important. In this dissertation, we address three key issues of data management in WSNs. For data collection, a scheme of making some nodes sleep and estimating their values according to the other active nodes’ readings has been proved energy-efficient. For the purpose of improving the precision of estimation, we propose two powerful estimation models, Data …
Distributed Algorithms For Maximizing The Lifetime Of Wireless Sensor Networks, Akshaye Dhawan
Distributed Algorithms For Maximizing The Lifetime Of Wireless Sensor Networks, Akshaye Dhawan
Computer Science Dissertations
Wireless sensor networks (WSNs) are emerging as a key enabling technology for applications domains such as military, homeland security, and environment. However, a major constraint of these sensors is their limited battery. In this dissertation we examine the problem of maximizing the duration of time for which the network meets its coverage objective. Since these networks are very dense, only a subset of sensors need to be in "sense" or "on" mode at any given time to meet the coverage objective, while others can go into a power conserving "sleep" mode. This active set of sensors is known as a …
Implementing Energy-Saving Improvements To The Ieee 802.15.4 Mac Protocol, Marco Valero
Implementing Energy-Saving Improvements To The Ieee 802.15.4 Mac Protocol, Marco Valero
Computer Science Theses
IEEE 802.15.4 is a standard designed for low data rate wireless personal area networks (WPANs) intended to provide connectivity to mobile devices. Such devices present considerable storage, energy, and communication constraints. However, they can be used in a variety of applications like home/office automation, environmental control and more. In order to extend the lifetime of the WPAN, we propose some changes to the standard including modifications to the Superframe Guaranteed Time Slot (GTS) distribution which can be optimized to reduce energy consumption. We implemented the proposed improvements to the IEEE 802.15.4 protocol using real sensor nodes. Specifically, we conducted an …
A Physical Estimation Based Continuous Monitoring Scheme For Wireless Sensor Networks, Wiwek Deshmukh
A Physical Estimation Based Continuous Monitoring Scheme For Wireless Sensor Networks, Wiwek Deshmukh
Computer Science Theses
Data estimation is emerging as a powerful strategy for energy conservation in sensor networks. In this thesis is reported a technique, called Data Estimation using Physical Method (DEPM), that efficiently conserves battery power in an environment that may take a variety of complex manifestations in real situations. The methodology can be ported easily with minor changes to address a multitude of tasks by altering the parameters of the algorithm and ported on any platform. The technique aims at conserving energy in the limited energy supply source that runs a sensor network by enabling a large number of sensors to go …
Distributed Algorithms For Improving Wireless Sensor Network Lifetime With Adjustable Sensing Range, Aung Aung
Distributed Algorithms For Improving Wireless Sensor Network Lifetime With Adjustable Sensing Range, Aung Aung
Computer Science Theses
Wireless sensor networks are made up of a large number of sensors deployed randomly in an ad-hoc manner in the area/target to be monitored. Due to their weight and size limitations, the energy conservation is the most critical issue. Energy saving in a wireless sensor network can be achieved by scheduling a subset of sensor nodes to activate and allowing others to go into low power sleep mode, or adjusting the transmission or sensing range of wireless sensor nodes. In this thesis, we focus on improving the lifetime of wireless sensor networks using both smart scheduling and adjusting sensing ranges. …