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Power Aware Simulation Framework for Wireless Sensor Networks and Nodes  [cached]
Johann Glaser,Daniel Weber,Sajjad A. Madani,Stefan Mahlknecht
EURASIP Journal on Embedded Systems , 2008, DOI: 10.1155/2008/369178
Abstract: The constrained resources of sensor nodes limit analytical techniques and cost-time factors limit test beds to study wireless sensor networks (WSNs). Consequently, simulation becomes an essential tool to evaluate such systems.We present the power aware wireless sensors (PAWiS) simulation framework that supports design and simulation of wireless sensor networks and nodes. The framework emphasizes power consumption capturing and hence the identification of inefficiencies in various hardware and software modules of the systems. These modules include all layers of the communication system, the targeted class of application itself, the power supply and energy management, the central processing unit (CPU), and the sensor-actuator interface. The modular design makes it possible to simulate heterogeneous systems. PAWiS is an OMNeT++ based discrete event simulator written in C++. It captures the node internals (modules) as well as the node surroundings (network, environment) and provides specific features critical to WSNs like capturing power consumption at various levels of granularity, support for mobility, and environmental dynamics as well as the simulation of timing effects. A module library with standardized interfaces and a power analysis tool have been developed to support the design and analysis of simulation models. The performance of the PAWiS simulator is comparable with other simulation environments.
Power Aware Simulation Framework for Wireless Sensor Networks and Nodes  [cached]
Glaser Johann,Weber Daniel,Madani SajjadA,Mahlknecht Stefan
EURASIP Journal on Embedded Systems , 2008,
Abstract: The constrained resources of sensor nodes limit analytical techniques and cost-time factors limit test beds to study wireless sensor networks (WSNs). Consequently, simulation becomes an essential tool to evaluate such systems.We present the power aware wireless sensors (PAWiS) simulation framework that supports design and simulation of wireless sensor networks and nodes. The framework emphasizes power consumption capturing and hence the identification of inefficiencies in various hardware and software modules of the systems. These modules include all layers of the communication system, the targeted class of application itself, the power supply and energy management, the central processing unit (CPU), and the sensor-actuator interface. The modular design makes it possible to simulate heterogeneous systems. PAWiS is an OMNeT++ based discrete event simulator written in C++. It captures the node internals (modules) as well as the node surroundings (network, environment) and provides specific features critical to WSNs like capturing power consumption at various levels of granularity, support for mobility, and environmental dynamics as well as the simulation of timing effects. A module library with standardized interfaces and a power analysis tool have been developed to support the design and analysis of simulation models. The performance of the PAWiS simulator is comparable with other simulation environments.
Power-Aware Node Deployment in Wireless Sensor Networks  [PDF]
Yunhuai Liu,Hoilun Ngan,Lionel M. Ni
International Journal of Distributed Sensor Networks , 2007, DOI: 10.1080/15501320701205597
Abstract: Wireless sensor networks (WSNs) have attracted intense interest due to their extensible capability. In this paper, we attempt to answer a fundamental but practical question: “how should we deploy these nodes?” In most current designs, sensor nodes are randomly or uniformly distributed because of their simplicity. However, the node deployment has a great impact on the performance of WSNs. Instead of maintaining the coverage for some snapshots of a WSN, it is essential that we can provide a continuous coverage in the whole lifecycle of the WSN. We will exhibit the weakness of the uniform distribution by disclosing the fatal sink routing-hole problem. To address this problem, we propose a non-uniform, power-aware distribution scheme. Our analysis and simulation results show that the power-aware deployment scheme can significantly improve the long-term network connectivity and service quality.
Rectangular Grids Design to Balance Power Consumption for Homogeneous Sensor Networks with High Node Density  [PDF]
Dali Wei,H. Anthony Chan,Benjamin Silombela
Information Technology Journal , 2007,
Abstract: Power consumption is an important issue in energy-constrained sensor networks. Many scheduling schemes have been proposed for sensor networks with high node density, to extend their lifetime by making only some nodes active while allowing others to go to sleep with negligible power consumption. However, most scheduling schemes do not take into account that the directional and uneven data traffic moving towards a data sink results in some areas running out of energy more rapidly than others, which may disconnect the network and the data sink, thereby wasting residual energy in other areas. This study proposes to balance the power consumption throughout the network for homogeneous sensor networks with high node density. The sensor network is partitioned into rectangular grids. Only one node is scheduled to be active in each grid at any time, to monitor that grid and to relay the data from other grids. To make energy stored in a grid proportional to the total power consumption of that grid, the lifetime of all individual grids is equalized. The simulation results show that the proposed algorithm not only extends the lifetime but it also improves the performance of sensor networks by preventing some areas from being out of monitoring earlier than other areas when the connectivity of the network is lost.
A Transmission Power Optimization with a Minimum Node Degree for Energy-Efficient Wireless Sensor Networks with Full-Reachability  [PDF]
Yi-Ting Chen,Mong-Fong Horng,Chih-Cheng Lo,Shu-Chuan Chu,Jeng-Shyang Pan,Bin-Yih Liao
Sensors , 2013, DOI: 10.3390/s130303951
Abstract: Transmission power optimization is the most significant factor in prolonging the lifetime and maintaining the connection quality of wireless sensor networks. Un-optimized transmission power of nodes either interferes with or fails to link neighboring nodes. The optimization of transmission power depends on the expected node degree and node distribution. In this study, an optimization approach to an energy-efficient and full reachability wireless sensor network is proposed. In the proposed approach, an adjustment model of the transmission range with a minimum node degree is proposed that focuses on topology control and optimization of the transmission range according to node degree and node density. The model adjusts the tradeoff between energy efficiency and full reachability to obtain an ideal transmission range. In addition, connectivity and reachability are used as performance indices to evaluate the connection quality of a network. The two indices are compared to demonstrate the practicability of framework through simulation results. Furthermore, the relationship between the indices under the conditions of various node degrees is analyzed to generalize the characteristics of node densities. The research results on the reliability and feasibility of the proposed approach will benefit the future real deployments.
Power Aware Wireless Sensor Node Design Using PSoC
SHAM P NAYSE,MOHAMMAD ATIQUE,ANITA AGRAWAL
International Journal of Innovative Research in Science, Engineering and Technology , 2013,
Abstract: This paper explores the features of reconfigurable architecture and programmable capability which are available with mixed array technology and the working results of performance developed wireless sensor nodes. A sensor node integrates sensing, processing and communication sub-systems. Several researchers have demonstrated operational nodes with low-power consumption. Our major focus for this article is to use the strategy of scheduling process. In sensor node and its network there is a scope to schedule processor tasks as per the objective of the application. Using this approach the result shows that the overall power consumption is reduced and it is observed in tune of 20_50%, as compared to conventional environment and practices.
Node Failures, Data Aggregation Delay and Its Impact on Power Optimization in Balanced Sensor Networks  [PDF]
Kamalanathan Kandasamy,Sreedevi A G,P Venkat Rangan,Maneesha V Ramesh
International Journal of Wireless & Mobile Networks , 2012,
Abstract: Wireless Sensor Networks (WSNs) have already emerged as an efficient method to collect data from harsh and human-not-reachable environments. They are employed in many delay-constrained applications where the data collected from the network is analyzed to give timely critical warnings. Such systems need to complete data aggregation and analysis with in minimum time. This research paper is concerned with the design of Multi Level and Two Level Balanced Tree WSN. This research proves that configuration plays a vital role in data aggregation delay, node failure, power optimization and network lifetime when designing a Tree WSN. This paper deals with a method to calculate the overall time for data aggregation in hierarchical network like balanced tree. Our simulation results analyze balanced multi level tree WSN and balanced two level tree WSN on number of computations needed to complete each process and tolerance of node failures. These Balanced configuration leads to less data aggregation delay. The study also deals with an interesting relation between node failure and data aggregation delay in balanced multi level tree WSN.
LOW POWER PH SENSOR FOR - WIRELESS SENSOR NETWORK NODE AGRICULTURAL APPLICATION
Kshitij Shinghal,Arti Noor,Neelam Srivastava,Raghuvir Singh
International Journal of Advances in Engineering and Technology , 2011, DOI: 10.7323/ijaet/v1_iss3_22
Abstract: A Wireless Sensor Networks (WSN) is now widely used in precision agriculture applications. Sensors play an important role in WSN. The measurement of soil pH is arguably the most widely performed test in the chemical laboratory, the use of pH sensitive field-effect transistors (pHFETS) is proposed for remote monitoring of the nutrient solution composition for an agricultural farm soil. The proposed system was formed by a sensor system based on polymeric (PVC) membranes with cross selectivity with time triggered sampling of sensor and its signal conditioning. With the optimized model, th0e pH levels of soil were monitored and the time triggered approach for sampling sensor improved the performance and lifetime of WSN node .The approach appears as a feasible method for the on-line assessment of nutrients and undesired compounds in fertigation solutions.
GUI Based Power System Simulation Tool  [PDF]
Mr.K.Suryasen,Mr.Harish.A
International Journal of Innovative Technology and Exploring Engineering , 2013,
Abstract: GUI (Graphical User Interface) based simulation tool has been developed for power system simulation lab and it can be used as an educational tool for analysis of power system. GUI figure file is developed in MATLAB environment for performance of transmission line, Y bus formation, Power angle curve, Fault studies, line flow and losses. The user can enter the data and obtained the results quickly in the form of data or figures. The advantages of GUI based simulations are Less time required for execution Students can solve and verify any power system problems in this area. The user can observe the effect of changing any parameters on the output data.An educational tool has been developed for the students to check the accuracy of their calculations and to observe the variations of input data and results and waveforms.
An Optimized Energy Efficient Routing Algorithm For Wireless Sensor Network  [PDF]
NIDHI BATRA,,ANUJ JAIN,SURENDER DHIMAN
International Journal of Innovative Technology and Creative Engineering , 2011,
Abstract: Wireless sensor network consists of thousands of individual nodes which collectively work as per application of the network. Each node made up of various parts which individually having a big research area. One of the upcoming research area of it is its power consumption which in turn depends on energy wastage of nodes. So various steps are to be taken to overcome this problem of energy wastage, one of them would be the proper designing of routing algorithm that considers the factor that enhances energy wastage. In this paper firstly outline of WSN is being discussed which includes MAC and routing protocols of WSN , then an optimised routing protocol is proposed and its analysis is done by MATLAB simulation tool. Finally paper is concluded and its future scope is being discussed.
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