The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper proposes a novel coil layout optimization that can determine the optimal coil design under the given working condition for wireless power transfer systems, using the smooth boundary representation. The optimized coil layout is validated through the experiments under the same condition.
A large number of battery-driven sensor nodes are deployed to operate a wireless sensor network, and thus power saving of nodes is a problem of vital significance. Many routing methods have been proposed to reduce energy consumption. In light of this fact, if it can be known how much energy consumption will be required for sensor nodes to operate a network before deploying the nodes, it will help...
Wireless sensor networks, which are used for monitoring large-scale linear structures, are having a significant importance due to its implementation and low cost maintenance. The main challenges that this technology faces are the location and automatic identification of thousands of nodes that are part of a linear large-scale infrastructure, with minimum processing and low power consumption of the...
Wireless Sensor Networks (WSNs) consist of small nodes with sensing, computation, and wireless communications capabilities. Routing is one of the new key technology which has become a hot research nowadays since the applications of WSNs are growing everywhere. Hierarchical routing in wireless sensor networks (WSNs) is a very important topic that has been attracting the research community in the last...
A Topology Preserving Map (TPM) is an easily obtainable localization free connectivity based map that preserves physical layout features of 2D/3D sensor networks. This paper considers how to obtain physical maps and physical coordinates from a TPM when the physical locations of a subset of nodes are known. First, we present a General Procrustes Alignment (GPA) based solution, which is the optimal...
Graph-based topology control adapts wireless topologies to achieve certain target graph structures. Wireless sensor networks seem well-suited for the expectations (in particular those on provided energy savings) raised by topology control. Nevertheless, topology control has never made the breakthrough in real-world deployments. This work explores the reasons for this, identifying five practical obstacles...
In a complex heterogeneous wireless sensor networks (HWSN), the individual sensor node is equipped with extremely different battery capacity and computational capability. Node failure is an inevitable phenomenon which leads to decreasing the lifetime and Qos of the networks. Topology control is an energy-efficient technique to prolong the network lifetime and maintain the network Qos. In this paper,...
Existing topology controls enable wireless nodes to control parameters, such as adjusting the transmission power or switching operating modes between a sleep mode and an active mode, to achieve energy savings and prolong network lifetime. However, the topology controls assume that the operating frequency is fixed or can be changed in a narrow range of frequencies, thus the communication distance is...
The Wireless Sensor Network (WSN) consists of numerous sensor nodes deployed randomly. These sensors are having tendency to fail, due to restricted battery life. The lifetime of sensor nodes has a greater dependency on its battery, as a result of failure of nodes the network lifetime will be reduced. In this paper, we propose a scheme for fault tolerance in wireless sensor networks by controlling...
The energy efficiency of WSN is important to determine whether a WSN can be widely and reliably deployed and applied. The fundamental problem is to lessen the energy consumption produced by the communication modules of WSN nodes. This paper analyzes and solves the problem from the perspective of how to design efficient data aggregation method. It aims to reduce the data quantity to be collected through...
Topologies with strong invulnerability and high reliability has become an important issue in the development of Wireless Sensor Networks (WSNs). In this paper, WSNs is modeled as a weighted network which the load of nodes is considered as the weight of nodes. Thus, the problem of balancing the load turns into the problem of balancing the weight of the network. A load-aware and energy-aware local world...
A Wireless Sensor Network (WSN) uses a large number of low-power sensor nodes and a base station to gather environmental information. However, the topology of WSN cannot always be fully connected owing to the limited communication range of sensor nodes. Therefore, relay nodes are used in the network to ensure reliable connectivity throughout the WSN topology. Since relay nodes are typically more expensive...
Multiplexing data transmission in time and frequency is an alternative to medium contention in wireless networks. The IEEE 802.15.4e standard, and its Time Slotted Channel Hopping (TSCH) mode in particular, provides such possibility in the context of constrained devices, for instance wireless sensor networks. We analyze the performance of TSCH leveraging from a real implementation in emulated environment,...
In this paper, we propose a new distributed sensor fusion algorithm for environmental monitoring by wireless sensor networks (WSNs). The considered WSNs are assumed to have limited communication capabilities. For each sensor node, a set of local estimation algorithms are maintained as its fused model for environmental variable to be sensed. The proposed algorithm relies on local information exchange...
The paper describes a new asynchronous communication network for reconfiguration of adaptive Wireless Sensor Network (WSN) nodes. The use of adaptive blocks is motivated by the need to increase the performance of the node while being energy efficient. They are able to adapt their performance to the environment, the energy budget and the task. The purpose of the proposed communication network is to...
The fault rate of on-load tap-changer (OLTC) has always been in a high level, and that is exactly the primary reason of transformer faults. As a result, an on-line detection method of OLTC was proposed. The embedded platform and wireless sensor network (WSN) technology was introduced into the on-line detection system. WSN was used to obtain OLTC status information. The embedded platform software,...
The ZIGBEE standard is one of the basal elucidation protocol proposed for wireless sensor networks. The protocol describes a flexible MAC layer layout to meet a variety of applications. Since WSN is pertinence-specific it is very termitable to provide a generic explication for all type of applications and topologies. Network inaccessibility is a sensual affair derived from the subsistence of fault...
Battery recovery effect is a phenomenon that the available capacity of a battery could increase if the battery can sleep for a while since its last discharging. Accordingly, the battery can work for a longer time when it takes some rest between consecutive discharging processes than when it works all the time. However, to the best of our knowledge, this impact has not been considered in the design...
Time Synchronized Channel Hopping protocol (TSCH) belongs to the new low-power MAC protocols included in IEEE 802.15.4e with better properties as a multihop network in industrial applications. An open issue in the standard is how to build and maintain the communication schedule. In this paper we have implemented a minimal recommended configuration and tested it against one proposed centralized scheduling...
The physical and logical representation of constrained embedded devices such as sensors and actuators plays a significant role in the Internet revolution to next era which is the Internet of Things (IoT). A Wireless Sensor Network (WSN) comprises of several tiny devices (called nodes) with restricted resources and has a capability of sensing and monitoring a certain environment to collect data and...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.