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.
In wireless sensor networks (WSNs) energy balancing and energy efficiency are the key requirements to prolong the network lifetime. In this paper, we investigate the problem of energy hole, where sensor nodes located near the sink or in some other parts of the network die very early due to unbalanced load distribution. Moreover, there is a dire need to utilize the energy resource efficiently. For...
Modelling data flow in wireless networks is a complicated task, since network dynamics are frequently unpredictable. The situation is even harder in the case of Wireless Sensor Networks (WSNs). Thus, many researchers instead of modelling the microscopic behavior of each single node, they choose to model traffic flow macroscopically. Fluid dynamic principles provide researchers with a powerful tool...
With the development of MEMS (Micro-electromechanical Systems), the wireless sensor networks (WSNs) have become an important communicating method for intelligent transportation application. Mathematics modeling, as an effective quantitative analysis method, is very important for conducting intelligent transportation performance research when WSNs are applied. Based on the channel contention mechanism...
In this paper, we propose an energy efficient data forwarding protocol called Energy Aware Geographic Routing Protocol (EAGRP) for wireless sensor networks to extend the life time of the network. In EAGRP, both position information and energy are available at nodes used to route packets from sources to destination. The routing design of EAGRP is based on two parameters: location and energy levels...
According to the power industry DL/T645 protocol and the characteristics of the meter data transmission, a wireless sensor network of automatic meter reading communications network is proposed. According to statistical feature of DL/T645 protocol and requirement of meter data transmission quality, an IEEE802.15.4 QoS (quality of service) communication network, is presented in this paper.
This paper describes energy efficient ZigBee system configured in star form to monitor health of electrical machines. Simulations are conducted to determine the throughput and energy consumption under Guaranteed Time Slot (GTS) operational conditions using superframes. The information transmitted from the machines has been processed using a SCADA system to set alarms and maintain trends. It is found...
In wireless sensor research a benchmarking environment where multiple platforms, network topologies, and commu nication protocols with changing parameters can be easily described, tested and evaluated under different circumstan ces in a controlled and reproducible way would be a swiss army knife in one's hand. Such an environment could reveal the effectiveness or the bottleneck of networks and proto...
In Wireless Sensor Networks, the traffic is light under idle or light load. When an event is detected the network becomes active and the data flow traffic becomes heavy, which leads to congestion. Congestion plays an vital role in reducing the performance of the network. Hence it necessitates to develop an effective congestion control technique. This paper focus on congestion detection and control...
Recent advances in wireless communications technology and low-power, low-cost CMOS imaging sensors enable a new sensing modality employing ubiquitous distributed video sensing. In many video sensing applications multimedia streams are often required by the base station to provide detailed information of the target spot in the sensor field. Such applications demand a strict throughput requirement for...
Recent advances in wireless communications technology and low-power, low-cost CMOS imaging sensors enable a new sensing modality employing ubiquitous distributed video sensing. In many video sensing applications multimedia streams are often required by the base station to provide detailed information of the target spot in the sensor field. However, limited bandwidth, unstable network environment,...
A large scale discrete event model of a distribution center is presented where critical parameters identified were utilized to create a real-time scheduling control policy to improve throughput and redistribute work in process (WIP), reducing bottleneck process and overall WIP. In implementing the control policy, it was found that the data was queried multiple times at the same time stamp and continuously...
The event-driven nature of wireless sensor networks (WSNs) leads to unpredictable network load. As a result, congestion may occur at sensors that receive more data than they can forward, which causes energy waste, throughput reduction and packet loss. In this paper, we propose a rate-based fairness-aware congestion control protocol (FACC), which controls congestion and achieves approximately fair...
Recently, mobility-assisted data collection has been proposed to prolong network lifetime. However, the upper bound of throughput capacity in such mobility-assisted data collection models has not been studied. In this work, we first derive the upper bound of throughput capacity when a mobile sink is available for data collection. Given the traveling speed of the mobile sink and the required delay...
Underwater sensor networks are typically distributed in nature and the nodes communicate using acoustic waves over a wireless medium. Such networks are characterized by long and variable propagation delays, intermittent connectivity, limited bandwidth and low bit rates. Due to the wireless mode of communication between the sensor nodes, a medium access control (MAC) protocol is required to coordinate...
The QoS requests of data traffic with lower priority in hotspot areas are not always satisfied in a traditional cellular wireless communication system. But on the other hand, about 60% of the channel slots allocated to a voice user is wasted due to the spurt of speech packets. In this paper, a cooperative strategy for transmitting data packets and speech spurt packets over the shared channel of voice...
The use of wireless sensor networks (WSNs) for structural health monitoring is gaining popularity since it allows for a low-cost, rapid and robust assessment of structural integrity. Meanwhile, recent advances in ambient energy harvesting technology have made it a viable alternative source of energy for powering WSNs. WSNs powered by ambient energy harvesting (WSN-HEAP) are potentially moreuseful...
In this paper, we propose an efficient routing solution for correlated data collection in wireless sensor networks. Our proposed routing metric considers both the interference distribution as well as the data correlation when establishing routes. An iterative, distributed solution based on local information is proposed using a game theoretic framework. Routes are chosen to minimize both the interference...
The capacity of a wireless network has been widely studied in the literature, including the capacity for unicast and the capacity for broadcast. In this paper, we studied the capacity of a wireless network for broadcast. Previous studies on broadcast capacity either assume that all links in the wireless network has the same channel capacity, or assume that the transmission ranges of a wireless node...
Wireless sensor networks are characterized by multihop wireless lossy links and resource constrained nodes. The aim of this paper is to provide a probability density function that completely characterizes the relationship between location and communication properties using non-parametric statistical techniques. Furthermore, we study individual link properties and their correlation with respect to...
The IEEE 802.15.4 protocol has the ability to support time-sensitive wireless sensor network (WSN) applications due to the guaranteed time slot (GTS) medium access control mechanism. Recently, several analytical and simulation models of the IEEE 802.15.4 protocol have been proposed. Nevertheless, currently available simulation models for this protocol are both inaccurate and incomplete, and in particular...
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.