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A wireless sensor network (WSN) comprises a large number of wireless sensor nodes. Wireless sensor nodes are battery-powered devices with limited processing and transmission power. Therefore, energy consumption is a critical issue in system designs of WSNs. In-network data fusion and clustering have been shown to be effective techniques in reducing energy consumption in WSNs. However, clustering can...
In this paper, aiming to reduce cellular network load, we propose a cooperative download method by which user terminals exchange fragments of a content called chunks through short-range wireless communication like Bluetooth or Wi-Fi with other user terminals who want the same content. In order to reduce the cellular network load, it is necessary to receive as many chunks as possible via short-range...
Wireless traffic that is destined for a certain device in a network, can be exploited in order to minimize the availability and delay trade-offs, and mitigate the Energy consumption. The Energy Conservation (EC) mechanism can be node-centric by considering the traversed nodal traffic in order to prolong the network lifetime. This work describes a quantitative traffic-based approach where a clustered...
In a mobile ad hoc network, efficient routing, resource allocation, and energy management can be achieved through clustering of mobile nodes into local groups. In this paper we propose a clustering scheme that allows self-configuration and adaptation of the network, prolonging its lifetime by distributing energy consumption among clusters. A combined weighted metric approach is used to select cluster-head...
Wireless Sensor Networks (WSNs) have recently enjoyed a tremendous rise in popularity. The current WSN node offerings, however, need both increased processing power and lower energy consumption in order to enable the full potential of such networks. To address these requirements, we explore the benefits of an innovative platform which combines a standard wireless node with very low cost reconfigurable...
Nodes in most cooperative networks are powered by batteries and some of which are even non-rechargeable. Therefore, power allocation schemes must be developed to save the transmit power and improve the life-time of the system. In this context, we present a novel power allocation scheme for multiple relay nodes that results in efficient cooperative communication. Considering channel path loss, the...
In the last decade, both mobile and multimedia communications have experienced unequaled rapid growth and commercial success. However, transmitting multimedia flows over wireless Ad hoc network remains an extremely challenging issue due to the limited battery lifetime of the wireless nodes. The focus, of this paper, is to design a new efficient protocol optimizing the energy consumption when transmitting...
IEEE 802.11ad Task Group is currently defining a standard for multi-gigabits per second data rate WLAN connections in the 60 GHz band with a target completion date of 2012. The 802.11n, which operates in 2.4/5 GHz band, guarantees data rate of at least 108 Mbps and coverage of about 50 meters, with a maximum data rate of 600Mbps over relatively short distances. In comparison, 60 GHz band can support...
Energy and bandwidth are limited resources in wireless sensor networks, and communication consumes significant amount of energy. When wireless vision sensors are used to capture and transfer image and video data, the problems of limited energy and bandwidth become even more pronounced. Thus, message traffic should be decreased to reduce the communication cost. In many applications, the interest is...
Energy consumption is one of the active research areas in wireless communication due to the limited battery attached to mobile devices. This paper describes an energy efficient network architecture for infrastructured wireless networks. The contributions of this paper are the study of a distributed localized algorithm for constructing Voronoi diagram followed by a network architecture based on Voronoi...
Many schemes have been studied in the recent past facing the trade-offs between wireless mobility, the capacity impact and the Energy Conservation (EC) onto overall performance. Available resources should be supported by the effectiveness of the storing on-demand scheme along considering the EC of the wireless device. In this work there is a consideration of the diversity properties of the wireless...
A location independent coverage control algorithm LICA is proposed in this paper. LICA adopts the hierarchical clustering idea. The neighboring nodes exchange the information and find out redundancy node in order to turn off their communications equipment. The simulation and analysis study demonstrate that the LICA not only provides the high quality of area coverage and good scalability, but also...
Anycasting has been proposed recently as an efficient communication method for asynchronous duty-cycled wireless sensor networks. However, the interdependencies between end-to-end communication cost and the anycasting design parameters have not been systematically studied. In this paper, a statistical end-to-end cost model is presented to capture the end-to-end latency and energy consumption of anycasting...
Due to limited energy supplies, reducing power consumption is an important goal in wireless sensor networks. Clustering techniques are used to reduce power consumption and prolong network lifetime in many existing research efforts, among which grid-based ones are often used due to their simplicity and scalability. However, most existing work uses average distance as a simplification in calculating...
Recently, much effort aiming at achieving ubiquitous networks has been made. A ubiquitous network refers to a network environment, which enables anytime and anywhere access, by possibly any given device or by any user. In a ubiquitous network, applications require many types of information such as temperature and so forth. A great deal of attention has been paid to aggregate this information in Wireless...
Low-power transmissions of sensor nodes are easily corrupted by interference generated by co-located wireless terminals that leading to packet losses might increase energy consumption and result in unreliable communications. Dynamic spectrum access mechanisms can mitigate these problems allowing cognitive sensor devices to sense the spectrum and access the wireless medium in an opportunistic way....
In wireless sensor networks (WSN), energy efficiency is critical, particularly for large-scale deployments. In this paper, we analyze the benefits of using dual-radio, from the perspective of network lifetime, in conjunction with clustering architecture, which is widely adopted for scalability. Two types of radios, which have different property of energy consumption, are used for different purposes...
Wireless Sensor Network (WSN) is a novel information acquiring and processing technology. To increase the life of WSN, each sensor node has to transmit the queuing data efficiently and conserve its energy, how to share the query of transmission for the collected information of sensor nodes becomes a new problem. Based on polling scheme with the unique characteristics of contention-free of access,...
Deterministic deployment of distributed sensor networks (DSNs) is sometimes impractical in situations where a global map of the environment is either unavailable or of little use because the environment is dynamic or hostile. One way to deal with such situations is to randomly scatter sensor nodes in the area of interest. However, the deployment carried out in such a way is generally far from optimal...
Although current research focused on sensor deployment to balance the energy consumption among the sensor nodes for prolonging the lifetime of wireless sensor networks, sensor nodes with larger communication radius have to consume more energy to overcome wireless channel fading and path loss. Cooperative transmission allows nodes with single-antenna to cooperate on information transmission and/or...
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