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Water distribution networks require long term autonomous monitoring solutions, integrated, reliable and cost effective data transfer methods. This paper investigates the data delivery infrastructure of water distribution network sensor equipment used for network monitoring and billing of the subscribers. Water distribution network usually apply sensors to measure water flow, pressure and temperature...
The main problem in Wireless Communication Networks in the field nodes is that the battery resources are constrained. In multi-hop network, if one of the nodes is switched off due to low battery power, the network is disconnected and the field information could be lost. While energy efficiency of communication protocols tries to ensure extended network lifetime, but battery drainage problem still...
Automatic and real-time monitoring of the deformation and instability of slopes and crags is an effective means to predict landslide and other geological disasters. It helps grasp the disaster rules, make a timely qualitative or quantitative safety evaluation, and minimize the disaster occurence and damage. The ZigBee-based WSN (Wireless Sensor Network) technology was used to real-time sample and...
In wireless sensor networks, sensor nodes will transmit the sensing data to sink through multi-hop, this kind of transmission will cause the hotspot problem, and also the effectiveness of sensing data will be decreased in larger network environment. To solve all these problems, we propose an instantaneous data dissemination mechanism which can use multiple mobile sinks to collect the sensing data...
For the weakness in the cluster head election of LEACH algorithm in Wireless Sensor Network(WSN),We propose an improved algorithm based on LEACH from point of view that regional energy balance of the network. Proposed algorithm can make the node that has more remaining energy to serve as the cluster head(CH). Meanwhile, when the sensor nodes choose the CHs, it will depend on not only the distance...
In the work, a kind of low power, multi-parameter composite fire detection node is designed, which can detect temperature, smoke concentration and CO gas concentration. And combining with the WSN (wireless sensor network), a real-time wireless fire monitoring system is established. This system is applied in fire detection of special circumstance represented by the ancient buildings. The hardware and...
Continuous improvement in hardware design and advances in wireless communication have enabled the deployment of various wireless sensor applications. Though, sensor nodes are highly resource constrained in terms of limited processing speed, runtime memory, persistent storage, communication bandwidth and finite energy. Flash memory has become a more widespread storage medium for modern wireless devices...
Clustering is an effective approach to hierarchically organizing network topology and to prolong the lifetime of a wireless sensor network. Current clustering protocols usually utilize two techniques: selecting cluster heads with more residual energy and rotating cluster heads periodically to distribute the energy consumption among nodes in each cluster. Most of the researches in this field has focused...
A wireless sensor network consists of at least one base station and multiple sensor nodes. These nodes are battery powered and are expected to operate for a long time therefore energy efficiency becomes a crucial design objective. Optimization of network lifetime can be achieved by balancing the energy consumption within the network. This requires nodes to split their flows to many other nodes to...
Clustering is a widely discussed as an important architecture for data centric wireless sensor networks. Low energy adaptive clustering hierarchy (LEACH), proposed in past, is used as benchmark scheme by many proposals and its performance is widely studied in the literature, over last few years. The probabilistic and randomized clusterhead selection strategy results in variable number of clusterheads...
Sensors in sensor networks have limited energy and in large-scale sensor networks, communication between sensor nodes is necessary to cover a large monitoring region, thus energy preserving techniques are important. In this paper, we propose a hybrid protocol, which we will call collectively Chain-based LEACH (CBL) that improves the Low-Energy Adaptive Clustering Hierarchy (LEACH) to significantly...
In wireless sensor networks, the preloaded program code and data on sensor nodes often need to be updated due to changes in user requirements or environmental conditions. Sensor nodes are severely restricted by energy constraints. It is especially energy consuming for sensor nodes to update code through radio packages. To efficiently update code through wireless radio, we propose an algorithm, reprogramming...
Existing localization algorithms in Wireless Sensor Network (WSN) can be divided into two categories: range-based and range-free. Most of the range-based localization algorithms proposed made use of the Received Signal Strength Indication (RSSI) to make an estimation of the distance between transmitter and receiver. Based on our experiments, there is no relationship between RSSI and distance in indoor...
We have analyzed the effect of innovations in Nanotechnology on Wireless Sensor Networks (WSN) and have modeled Carbon Nanotube (CNT) and Micro-Electro-Mechanical Systems (MEMS) based sensor nodes. SUGAR library in MATLAB has been used to illustrate the static analysis of deflection, display the structure and to compute the displacement parameters of a cantilever beam subjected to an external force...
The ability to update or exchange the program code running on sensor nodes is a core requirement in many wireless sensor network scenarios. Such code update mechanisms must take the specific resource limitations of wireless sensor nodes into account since both the transmission and the processing of updates consume considerable amounts of time and energy. We present TinyModules, a novel code update...
This paper introduces our work on the communication stack of wireless sensor networks. We present the IPv6 approach for wireless sensor networks called 6LoWPAN in its IETF charter. We then compare the different implementations of 6LoWPAN subsets for several sensor nodes platforms. We present our approach for the 6LoWPAN implementation which aims to preserve the advantages of modularity while keeping...
Wireless Sensor Networks are traditionally composed of a multiplicity of sensor nodes that sense given phenomena and deliver the sensed data to specific sink nodes. In the most of the application scenarios, sensor nodes have been considered motionless. On the contrary, interesting possibilities arise if some sensors are embedded in devices carried by mobile agents as people, cars, animals, etc. If...
This paper presents the design and FPGA hardware implementation of a multiple-input multiple-output (MIMO) system for wireless sensors networks (WSN). This system will offer more parallel channels between the sensor nodes and the base station at the same frequency band, thereby increasing spectral efficiency. The hardware design of the MIMO wireless sensor network system has been described using VHDL...
In this paper we focus on the energy optimization based on the incremental exploration of the network. We perform one-hop neighborhood exploration of the neighborhood but the work can be generalized to 2-hop, 3-hop, . . . up to the diameter of the network, which is the minimum number of hops between any two nodes in the network. We propose three distributed algorithms for self-adjusting the transmission...
Wireless sensor networks are more adaptive to habitat surveillance applications than other technique due to high distribution density and self-organization of tiny sensor nodes. This paper introduced a framework of wireless sensor networks combined with GPRS (General Packet Radio Service) for habitat monitoring. Detailed presentation of a novel sensor node making use of ARM technology and IEEE502...
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