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Automation of modern industrial plants require real-time tracking of object locations and sensing of local and ambient parameters for variety of applications such as counting and tracking of objects in assembly line, detection and positioning of failures of machines etc. Mostly, discrete Real Time Location System (RTLS) performs object tracking in existing industrial automation without its integration...
Reliability is an important research issue in wireless sensor networks(WSNs). Many literatures about how to improve network reliability in WSNs have been proposed, however the research on establishing evaluation models of reliability for WSNs is yet insufficient. In this paper, a model to evaluate the reliability of wireless sensor networks (WSNs) is proposed. This network state based model can effectively...
To evaluate the reliability of WSN whose topology is clustering structure, we model the WSN as a Weighted Voting System (WVS) with unreliable links, and propose an algorithm. The algorithm is based on universal generating function technique, and two composition operators are defined to composite u-functions of member nodes, links and cluster heads. Test results shows that the proposed algorithm can...
In order to eliminate the problems associated with the conventional grids, smart grids are coming into existence nowadays. One of the advantages of smart grid is that it can utilize both conventional and non conventional sources of energy to meet the load demands and sends the monitored data to control station in digital form. ZigBee has been identified earlier as the one of the most suitable wireless...
Transmission of electricity from thermal power plants to areas like villages in hilly terrains, villages in dense forests and highly rural and inaccessible areas incurs high losses. Some of those areas with renewable energy potential are thus presently getting dependant on renewable sources of energy to obtain electricity. But, monitoring the performance of these renewable sources of energy from a...
Over the past few years wireless sensor networks applications have evolved from a stage where these networks were designed in a technology-dependent manner to a stage where some conceptual understanding issues now exist. As wireless sensor networks are deployed, energy consumption emerges as a core requirement. Recent advances in energy harvesting technology for wireless devices have increased the...
Wireless links are one of the primary performance-limiting factors in wireless sensor networks (WSNs). In particular, link failures negatively influence the network performance, reliability, and availability in most cases. In WSNs, a link failure might result in the loss of the shortest path between a sensor node and the sink node; thus the data will have to be transmitted via a longer path, leading...
The wireless sensor networks are usually energy constrained and to ensure this network is highly consistent, the reliability factor should be given top priority. Because of hardware crash, software bugs, environmental risks etc., there would be errors and faults occur and hence the reliability factor is severely affected. Most of the faults at sensor nodes are either permanent in nature due to energy...
Development in the domain of embedded systems and communication technologies have created an industrial need to automate tasks and to render more control. Rapid advancement in data processing technologies, wireless communication, evolution of Micro-Electromechanical Systems, business intelligence, process planning and control has created a room for improvement in all areas of industrial practices...
There are different conditions for routing algorithms in wireless sensor networks. In this article, an optimized routing algorithm is provided with two objectives; reliability and energy-balancing in wireless sensor networks. Through creating optimal routes, beside maintening energy balance in network, the algorithm proposed here ensures reliable information and data transmition to base station. In...
Applications of low cost wireless sensor networks (WSN) in precision agriculture is gaining popularity because of the ability of sensors to provide site-specific data over a variable field. Wireless communication between nodes is impeded by the surrounding vegetation of the plants being monitored. To guarantee reliable communication between sensor nodes, the initial node density and topology of a...
Routing protocols based on gradient and cluster in wireless sensor network is analyzed. A concept of sensor node's potential is proposed. By adopting the technologies of building potential, clustering based on potential, the adjustive power routing of cluster head, a new potential-based routing protocol (PBRP) is designed. Simulation results show that the new routing protocol provides longer lifetime...
An efficient utilization and allocation of the limited resources of a wireless sensor network (WSN) in a way that maximizes the information value of the data collected is a significant research challenge. Within this context, this result concentrates on architectural approach as a means of focusing a sensor's on obtaining the important data at heterogeneous environment. Our goal is to facilitate the...
One of the challenging aspects for wireless sensor network (WSN) clustering is to estimate the optimal cluster number. Most WSN clustering techniques have used an a priori value to determine the cluster number. A few techniques, available at the literature, attempted to find the optimal cluster number by energy minimization. However, due to the assumption of lossless communication, these initiatives...
Clustering is a good method to increase WSN lifetime and particularly for smart environment. In this paper, we present fuzzy position based routing for clustered sensor network. It is very useful for the smart environment applications of wireless sensor network without GPS support. The destinations could be located with ambiguous position vectors, and the long time and energy consumption of requesting/replying...
For a wireless sensor node of an overhead power line monitoring system a power module was developed using the electrostatic field around the conductor to supply the sensor system. Special requirements in functionality, reliability and the limited accessibility at the power line result in the development of a specific energy management strategy. First prototypes of the power module were realized and...
This paper introduces the development of an effective low cost monitor system to assist the normal function and the maintenance of Overhead Contact System(OCS). The whole system contains a remote monitor centre, some local monitor centres and lots of monitor modules. All the communications are through wireless network. The paper also shows how such a system could be used for OCS monitor, and the detection...
In this paper we formulate and analyze a model for assessing the reliability of a wireless sensor network (WSN) based on classifying the operating states of each node at any instant into one of three possible states: a state where both the sensing and wireless modules are operating, a state where only the wireless module is operating, and a state where the wireless module is failed. Thus, in the second...
Network coding scheme improves throughput and reliability in a Wireless Sensor Network. A straight forward broadcasting by flooding in a wireless sensor network is very costly and reduce the network coding benefit. The packet loss probability increases due to contention and collision which is referred as broadcast storm problem. In this paper, we have proposed a Network Coding based Probabilistic...
Ubiquitous technology through sensor networks is being applied to numerous industrial fields specially to increase the quality of human life (QoL). Therefore, Wireless Sensor Networks (WSNs) lossless data is one of the communications challenges to provide accurate data. Although, end-to-end data retransmission has evolved as a reliable transportation in Internet, this method is not applicable to WSNs...
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