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Underwater acoustic sensor networks are characterized by limited transmit power and bandwidth, and a harsh communication environment. Different techniques for reliable communication in underwater networks have been studied in the literature at different layers of the network protocol stack. Among these, the use of fountain codes as a way for improving the quality of the communication over a highly...
Energy hole is regarded as one of the challenging issues in wireless sensor networks (WSNs). According to this problem, nodes that are closer to the sink lose their energy earlier than other nodes. Consequently, it leads to the early breakdown of the network. One approach for preventing this problem is to use mobile sink rather than one or more sinks with fixed positions. Also, using fuzzy logic and...
Time series prediction techniques reduce the number of messages generated at the application level, saving energy spent in the communication and, consequently, extending the network lifetime. Trickle is a well-known time series prediction mechanism commonly used to decrease the number of transmitted messages in Wireless Sensor Networks (WSN) and thus save energy. This paper presents the Space-Time...
One of the major concern of Wireless Sensor Networks (WSNs) is to minimize the energy consumption of the sensor nodes. In multi-hop clustering, sensor nodes closer to the Base Station (BS) deplete their energy faster as compared to far away nodes. Transmission of own data as well as other nodes data by the nearer nodes is the prime cause for this uneven energy consumption. Hence, the nodes closer...
Wireless Sensor Networks (WSNs) are getting popular day by day. But due to the constrained of resources and limited battery supply of sensor nodes, this becomes the major areas of research. Earlier the LEACH protocol proposed contributes a lot in terms of reducing energy consumption among sensor nodes. Later on concept of rendezvous nodes (RZ) and mobile sink was combined with LEACH to reduce energy...
In this paper, we introduce an opportunistic networking protocol, denoted as NOPPoS, that assigns station and access point roles to mobile devices based on the number of mobile devices and access points in the proximity. As main novel feature, NOPPoS is highly responsive to node mobility due to periodic, low-energy scans of its environment. In fact, NOPPoS can determine the exact number of neighbors...
Smart metering is one of the main objectives for the EU member states to ensure the benefit of consumers on the long term. Due to its functionality, smart meters have a wide applicability in: power quality monitoring, energy savings, data awareness and fraud detection. With long-term cost benefits of the smart meters, it is expected that 72% of European consumers will have a smart meter for electricity...
One of the most well-known clustering methods for wireless sensor network is, no doubt, the so-called low energy adaptive clustering hierarchy (LEACH) because it is simple and easy to implement. Although LEACH tries to provide a fair selection mechanism by randomly selecting a number of sensors as the cluster-heads, it does not take into account the distribution of sensors, the main reason that LEACH...
This paper considers the problem of joining a network of constrained IoT devices. We propose to take advantage of Singer Cyclic Difference Sets (S-CDS) for a joining scheme that results in low duty cycles and apply the proposed scheme to the joining problem in 802.15.4e TSCH networks. S-CDS distributes the active periods of nodes over time so that a joining node does not suffer from long scanning...
The majority of available wearable computing devices require communication with Internet servers for data analysis and storage, and rely on a paired smartphone to enable secure communication. However, many wearables are equipped with WiFi network interfaces, enabling direct communication with the Internet. Secure communication protocols could then run on these wearables themselves, yet it is not clear...
Smartwatches are quickly gaining popularity, but their limited battery life remains an important factor that adversely affects user satisfaction. To provide full functionality, smartwatches are usually connected to phones via Bluetooth. However, the Bluetooth power characteristics and the energy impact of Bluetooth data traffic have been rarely studied. To address this issue, we first establish the...
In a Wireless Sensor Network (WSN), there are a large number of nodes whose power supply and computational capability are limited. The nodes in a wireless sensor network can be fixed or move randomly. Thus in these networks, to forward a data packet from one node to another needs to use specific strategies with very different characteristics. Accordingly the data forwarding strategy among nodes plays...
Wireless Sensor Network has constraint with energy and computation. Network Life is based on the way the energy in the battery is used. Continuously sending data along a specific path for long intervals of time, results in large amount of energy consumption. This could eventually lead to network partitioning, which in turn will create a path loss between the sender and receiver. Though several (sensor)...
With high expansibility of sensor electronic devices, wireless sensor networks have attracted more and more attention. The k nearest neighbors (k-NN) query has become a significant part of sensor networks due to its availability and convenience. However, it is an important but challenging problem to keep privacy and security while still maintaining low energy consumption. In this paper, we address...
Nowadays, one of the most challenging design issues of battery-driven real-time embedded systems is how to reduce energy consumption such that the battery life can be prolonged. Based on dynamic voltage scaling technology, many energy-efficient real-time task scheduling algorithms have been proposed, however, relatively little work is done in the presence of task synchronization. In this paper, energy-efficient...
This paper compares the energy consumption used for communication in the special case of a wireless sensor network that is deployed linearly over a long distance to monitor assets such as transmission lines or pipelines. A model for energy consumption is developed based on a suitable network architecture for a linear wireless sensor network (WSN). Using the model, the energy consumption of networks...
Several monitoring oriented applications in Wireless Sensor Networks (WSNs) are characterized by the necessity of two data-reporting modes: time-driven and event-driven. The former is used mainly for constantly supervising an area and the latter for event detection and target tracking. By switching between both modes a WSN can improve its energy-efficiency and accuracy of measurement processes, compared...
Low power sensors are emerging to up held the current edge technology. Sensor devices linked to each other via short ranged radios form wireless sensor networks (WSN). In recent development, WSNs are utilized for Internet of Things (IoT) applications like monitoring, automation and control, etc. The data collected is dumped on internet cloud so that easy access to data from remote place is possible...
Mobile devices have become quite popular, and they are responsible for a significant part of Internet traffic. In these devices, multimedia services, such as video streaming over HTTP, are commonly adopted, and TCP protocol is the standard to assure reliable data transmission. To deal with applications that require higher bandwidth, several modifications were made on TCP, and they are called extensions...
Consider the problem of energy loss caused by inefficient use of energy in Wireless Sensor Networks (WSN). A clustering energy-efficient transmission protocol for wireless sensor networks based on ant colony path optimization (CEETP-ACPO) is proposed. Firstly, use the distributed cluster computing energy-efficient routing scheme (DCCERS) to select cluster heads according to the center of gravity and...
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