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.
Infrastructure networks are highly interrelated to the prosperity, security, economy, and public health of the modern world. As such, any disruption in the infrastructure network poses a significant damage to society, therefore this paper presents a resilience analysis approach to evaluate the reliability of infrastructure networks so as to quantitatively determine the ability of a network to cope...
Multistage Interconnection Networks (MINs) are design to provide an effective communication in switching. In optical MIN, optical signal are routed through the connecting path by electronically controlled switching element using directional coupler. Shuffle-exchange networks (SENs) have been widely considered as practical interconnection systems due to their size of it switching elements (SEs) and...
This paper presents a simple and efficient multi-objective reconfiguration approach for balanced distribution networks. Two types of power quality indicators are minimized: (i) power losses and (ii) average system interruption frequency. The proposed approach starts with meshed networks by closing all tie switches. Three switching indices were defined for reconfiguration using branch failure rates...
The application of developed software simulator for reliability calculation of a complex communication network is presented in this paper. The communication network is comprised from nodes (communication stations) and links between them. Simulator is implemented in GPSSWorld program. It executes over 500000 iterations for a few seconds. The reliability estimation is based on exponential distribution,...
Numerous wireless networks had been developed providing various services to promote improved communication quality in our daily lives, and then the users pay more attention in the network reliability in providing stable services. The structuration of wireless MESH network has advantages in networking reliability. Based on the structuration of wireless MESH network we design a kind of virtual hierarchy...
Wireless Sensor Networks (WSNs) consist of a large number of wireless nodes and are responsible for sensing, processing and monitoring environmental data. WSNs suffer of some problems such as limited processing capability, low storage capacity, limited time of testing and limited reliability. The Compressed sensing theory holds promising improvements to these parameters. Compressed Sensing shows that...
Industrial wireless mesh networks are deployed in harsh and noisy environments for process measurement and control applications. Compared with wireless community networks, they have more stringent requirements on communication reliability and real-time performance. Missing or delaying of the process data by the network may severely degrade the overall control performance. In this paper, we abstract...
In MANETs, flooding-based route discovery is usually preferred in order to set up the route with reliability between transmission pair. However, this approach may cause a serious contention in transmission between adjacent nodes and a considerable amount of control packets. In addition, most of ad hoc routing protocols establish the route with minimum hop count. Consequently, the performance of ad...
Various application services including multimedia applications need efficient multicast technologies, but the IEEE 802.11 protocol, which is currently the most widely used, does not specify the standard on multicast, which is, instead, substituted by broadcast or a combination of unicast. Using broadcast is, however, difficult to judge on the transmission success or fail, because it does not receive...
Wireless sensor networks can be used to deploy various applications to reflect the circumstance of environment. Video sensors used in wireless multimedia sensor networks (WMSNs) enhance such applications with multimedia data, but with specific characteristics requirement for the network. The aim of this work is to provide reliable data transport with multipath routing and load balancing congestion...
Reliable event delivery at MAC, routing and transport level has been explored to great extent to provide improved throughput and route resilience in wireless sensor networks. The evolution of wireless sensor and actor networks (WSAN) have posed an extra constraint in terms of reliable event response. The reliable response is defined as the the in time event delivery from sensor nodes to actors and...
Site-multihoming is an architecture which brings the benefit of reliability and load-sharing in a small scale network like a home network by connecting multiple ISPs (Internet Service Providers). In the discussion of IETF Multi6 Working Group, multihoming by multi-PA (Provider Aggregatable) addressing became rough consensus as the architecture for IPv6 site-multihoming. However, issues on multi-PA...
Multiple Channel Design (MCD) has been adopted widely in wireless networks to increase throughput and reliability with relatively less energy consumption. Due to physical restrictions of sensor nodes, applying multiple radio channels in sensor networks poses significant challenges, particularly on energy consumption. To address such challenges, we propose an energy-aware MCD scheme called SmartChannel...
There are many wireless sensor network(WSN) applications which require reliable data transfer between the nodes. Several techniques including link level retransmission, error correction methods and hybrid Automatic Repeat re- Quest(ARQ) were introduced into the wireless sensor networks for ensuring reliability. In this paper, we use Automatic reSend request(ASQ) technique with regular acknowledgement...
Security is of critical importance for many potential applications of wireless sensor networks. Broadcasting from base station to nodes is very important in the cases such as distributing secure keys in the network or delivering control commands to nodes. However, the sparse distribution and limited resource of nodes bring difficulties to the efficient and reliable broadcast in wireless sensor networks...
Wireless sensor networks increasingly become viable solutions to many challenging problems and will successively be deployed in many areas in the future. In this paper, we present performance requirements architecture of upper and lower layers design for WSNs. Our goal is to develop a framework that provides parameter requirements that are crucial to applications in WSNs, which are vulnerable to physical...
Wireless Sensor Networks (WSNs) consist of a large number of wireless sensor nodes networked together. It is a complex set of applications, link technologies, communication protocols, traffic flows and routing algorithms. Simulation is a predominant technique used to study and analyse the performance and potency of a senor network design. Since there are a huge variety of simulation tools available...
Recently, detection schemes of specific phenomena, called continuous objects, such as wild fire and bio-chemical material have been actively studied. A continuous object might cover a wide area and it could dynamically change its own shape according to physical environments, e.g. wind and geographical features. For continuous object detection, the schemes have focused on detection of the current boundary...
Body Area Networks (BANs) are only recently beginning to revolutionize e-healthcare by making monitoring of various patients accessible and convenient for physicians and patients. Past research in BANs has focused on biosensor design, signal processing, power efficiency, and wireless protocols. However, numerous challenges plague its development and implementation to this day. One of these is the...
In this paper, we consider a slow-fading nt ×nr multiple-input multiple-output (MIMO) channel subjected to block fading. Reliability (in terms of achieved diversity order) and rate (in number of symbols transmitted per channel use) are of interest in such channels. We propose a new precoding scheme which achieves both full diversity (nt ×nrth order diversity) as well as full rate (nt symbols per channel...
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.