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Wireless sensor networks (WSNs) is an assemblage of several lightweight and portable devices, usually deployed for monitoring and surveillance purposes. On the account of their small size these sensor nodes suffer from certain limitations such as limited source of energy, constrained memory size and low processing speed. Nowadays major research areas include devising new methods to prolong the network...
With the advancement of technology, a surge of research interest in cognitive radio based networks in smart communities has been mounting. It is anticipated that CR-enabled networks will play a vigorous role in the enrichment of communication efficiency in neighborhood sensor area network. This paper presents a framework for Cognitive Radio based event anomaly detection mechanism. A skeleton for intelligent...
In addition to the special field topology, a parking garage wireless sensor network restricts power consumption and data transmission time in terms of hardware equipment and service management. Without the consideration of node load or packet collision in the route of data transmission from a sensor to the sink node, the node will not only exhaust the energy but also may not transmit the data to the...
Sensors and sensor networks have an important impact in meeting environmental challenges. Sensor applications in multiple fields such as smart power grids, smart buildings and smart industrial process control significantly contribute to more efficient use of resources and thus a reduction of greenhouse gas emissions and other sources of pollution. Nowadays, the most topical researches pertaining to...
When deploying wireless sensor networks (WSNs) for industrial applications, to provide reliable data transmission as a stringent requirement must be fulfilled. However, due to dynamic industrial environments, interferences and node failures, to achieve this goal faces a number of challenges. Moreover, reliable transmission solution should also be resource efficient, so more wireless sensor nodes can...
In this paper, we introduce a novel algorithm aiming at maximizing the transmission capacity in wireless sensor networks (WSNs). Based on the Dijkstra algorithm and the max-flow theorem, the proposed algorithm solves the contradiction between the path length and forwarding capacity of various nodes, and thus scales up the relay capacity in terms of the number of transmitted packets from the source...
One of the main challenges confronted by wireless sensor networks (WSNs) is to reduce energy consumption of nodes for the purpose of network lifetime extension. In the literature, many backbone based protocols such as connected dominating set (CDS) and broadcast or multicast based protocols are employed in order to improve network performance in terms of metrics like energy consumption, number of...
The lifetime of a wireless sensor node is determined by the energy required to complete specific tasks defined by network application. To estimate the energy of a sensor node for specific application, it is required to profile its activity for a given application scenario. The paper presents an analytical approach to wireless sensor node activity profiling, which enables a block-level extraction of...
This research attempts a first step towards investigating the aspect of radiation awareness in environments with abundant heterogeneous wireless networking. We call radiation at a point of a 3D wireless network the total amount of electromagnetic quantity the point is exposed to, our definition incorporates the effect of topology as well as the time domain, data traffic and environment aspects. Even...
A typical Wireless Sensor Network (WSN) assumes a homogeneous set of nodes in terms of capabilities. However, this kind of network suffer from poor fundamental limits of latency during the data communication. Another model of WSN assumes a heterogeneous set of nodes with different capabilities (especially in terms of communication range and energy reserves) called Heterogeneous Sensor Networks (HSNs)...
Wireless Sensor Networks are by nature deployed over an undetermined geographical area with uncountable number of nodes, which makes them best studied through simulation. Due to special characteristics of these networks a number of simulation tools have been introduced by institutes and individuals each with different mechanisms and approaches. Hence, selecting a proper simulator based on the network...
Before zigbee most of the wireless protocols and standards were develop for high date rate and higher bandwidth and there were no considerations on the power consumption as the application needed to support longer distances and speed but this kind of technology was not efficient when the data which needed to be transmitted was of very small size and the distance was also not very large. One solution...
Based on Wireless Mesh Network (WMN), combined with the clustering topology features of Wireless Sensor Network (WSN), the structure of WSN can be reconstructed. Where made the heavier traffic sensor nodes or cluster head nodes netting together, and regarded sensor nodes as WMN clients which access Internet through WMN backbone, then reconstructed those topology as wireless mesh sensor network (WMSN)...
For sensor networks deployed to collect and transmit events into a sink node, sink anonymity is a critical security property. Traditional encryption and authentication are not effective in terms of preserving the sink's location because attackers can determine its location through traffic analysis. In this paper, we propose an easy to implement Concealing of the Sink Location (CSL) technique, which...
Enhancing lifetime of sensor nodes should be considered as the key design objective in Wireless Sensor Networks (WSN). A sensor node can only be equipped with a limited energy supply and it loses its energy during data communication. In some application scenarios, replenishment of energy resources might be impossible since the sensor nodes are distributed in remote environment. Hence, the nodes lose...
A significant challenge in wireless sensor networks is the transmission of data from a large number of nodes to a central collection point. This is commonly called converge-cast communication. At present, the IEEE 802.15.4 and ZigBee standards are widely used in the design of wireless sensor networks. The latter standard defines a methodology for converge-cast communication in tree-based network topologies...
Many applications require reliable and trustful data aggregation in Wireless Sensor Networks (WSNs). In this paper, we propose a new scheme to achieve data privacy and integrity protection in data aggregation for WSNs, called Preserving Privacy and Assuring Integrity (PPAI) scheme. For this, before data transmission, the PPAI scheme blurs the original sampled data of a sensor node by randomly breaking...
WirelessHART is an open wireless sensor-actuator network standard for industrial process monitoring and control that requires real-time data communication between sensor and actuator devices. Salient features of a WirelessHART network include a centralized network management architecture, multi-channel TDMA transmission, redundant routes, and avoidance of spatial reuse of channels for enhanced reliability...
A wireless sensor network is comprised of a large number of battery-limited sensor nodes. In a predefined period, sensor nodes get data and transmit data to BS by a fixed construction. In this paper, we introduce a scheme for selecting the construction to prolong the lifetime of wireless sensor network based on energy balance. Further, an optimal math model is proposed for calculating the energy cost...
Employing clustering techniques in routing protocols can increase the scalability of wireless sensor networks. Based on the fact that all the current routing protocols mainly cater to the network in which all the nodes are equipped with the same amount of initial energy, a kind of double cluster-head topology control algorithm based on the energy threshold which cater to heterogeneous wireless sensor...
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