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.
Wireless sensor networks (WSNs) play a key role in extending the smart grid implementation towards residential premises and energy management applications. Efficient supply and demand balance, and consequently reducing the electricity expenses and carbon emissions, is an immediate benefit of implementing smart grids. In this paper, design and implementation of an energy management system (EMS) for...
In this paper, we present a Multi-radius Ring-based Multi-hop Clustering Routing Algorithm (MRMCRA) in wireless sensor networks for agricultural monitoring system. Several concentric rings of different radius are created so that the whole area is divided into different subareas. The radius of each ring is carefully selected to balance the power consumption. Each cluster head (CH) is required to select...
Air quality monitoring in indoor environments is of great significance for comfort and health, especially nowadays that people spend more than 80% of the day indoor. We propose a flexible wireless system able to detect polluted air and dangerous situations in a complex and large environment. It is important for ambient intelligent systems to be unobtrusive and to optimize the power consumption of...
Energy consumption is a critical issue in wireless sensors. In this paper we describe a method used for power consumption monitoring, on each WSN node, during network employment. It provides the actual power consumption to be utilized by the applications running on sensor nodes, the time when switched to actual consumption profile and also the overall current consumption since the node is in service...
Based on a wireless sensor network with fixed network structure applied to grain storage monitoring system, the thesis designs an effective awakening strategy in the case of the non-synchronous network nodes. It enhances one-time-wake-up-rate of nodes with low power consumption, which overcomes the disadvantage of the universal awakening strategy. Experiment results show that one-time-wake-up-rate...
Energy-efficient node placement is one of the main design issues for linear structure wireless sensor networks. Two types of node placement schemes studied in the paper are to maximize the network lifetime and to balance the network reload. For a given number of nodes, study the optimal spacing; for a given node spacing, study the optimal density of nodes. Simulation shows, two types of node placement...
Summary form only given. Structural Health Monitoring (SHM) is a new challenge in wireless sensor design. In our project we are proposing an ultra-sonic measurement system to find malfunctions within structures. Examples of such structures are aircraft bodies and the wings of a wind turbine. It is required to allow for long term monitoring from a single battery or even using energy scavenging techniques...
In many-to-one wireless sensor networks, there exists an unbalanced power consumption problem; that is, nodes near the data sink or base station, called hot spots, have a high probability of forwarding a high amount of packets and die early. Most of previous work is dedicated to constructing a long-lived aggregation tree, while leaving the hot spot problem unsolved. When the locations of sinks are...
This paper presents prototypes of wireless sensor nodes and network system for monitoring the power consumption of information and communication devices. Nowadays, carbon dioxide (CO2) emission in the information and communication technology (ICT) field is increasing enormously due to the high electric power consumption in ICT devices, e.g., in Internet data centers (IDC) as well as offices and homes...
Wakeup radio schemes are employed to improve the energy efficiency in wireless sensor networks. In this paper, an analytical model is formulated to make a justified comparison between two different wakeup schemes, one-channel wakeup radio and two-channel wakeup radio. As the key measurement, energy efficiency is studied by taking the latency requirement as the main constraint. Moreover, the probabilities...
Sensor networks are characterized by limited energy, processing power, and bandwidth capabilities. These limitations become particularly critical in the case of event-based sensor networks where multiple collocated nodes are likely to notify the sink about the same event, at almost the same time. The propagation of redundant highly correlated data is costly in terms of system performance, and results...
Power management of sensor nodes is essential to maximize the lifetime of wireless sensor networks. Energy consumption of individual sensor node differs greatly depending on its type. Existing operating systems for sensor networks typically leave the power management of sensors to applications. Unless specific features of the sensors and batteries are considered in the application design, energy consumption...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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.