1,690 research outputs found
Wireless sensors networks
After studying in depth look at wireless sensor networks are quite clear improvement compared to traditional wireless networks due to several factors as are the durability of the lifetime of the batteries, allowing greater portability of sensor nodes and that can record more events to power stay longer in some places, the routing protocols networks sensors allow gain than in durability also gain in efficiency the avoidance of collisions between packets, which also ensures a lower number of unnecessary network traffic. Because of the great features of such networks are currently using sensor networks in many projects related to different fields such as: environment, health, military, construction and structures, automotive, home automation, agriculture, etc. This type of network currently is leading a technological revolution similar to that had appearance of internet, because the applications appear to be infinite, also speaks global surveillance network on the planet capable of recording and tracking people specific goods and research projects have generated great interest for application in practice
Giving neurons to sensors. QoS management in wireless sensors networks
Public utilities services (gas, water and electricity)
have been traditionally automated with several technologies. The
main functions that these technologies must support are AMR,
Automated Meter Reading, and SCADA, Supervisory Control
And Data Acquisition. Most meter manufacturers provide devices
with Bluetoothr or ZigBeeTM communication features. This characteristic
has allowed the inclusion of wireless sensor networks
(WSN) in these systems. Once WSNs have appeared in such
a scenario, real-time AMR and SCADA applications can be
developed with low cost. Data must be routed from every meter to
a base station. This paper describes the use of a novel QoS-driven
routing algorithm, named SIR: Sensor Intelligence Routing, over
a network of meters. An arti cial neural network is introduced
in every node to manage the routes that data have to follow. The
resulting system is named Intelligent Wireless Sensor Network
(IWSN)
NFV Based Gateways for Virtualized Wireless Sensors Networks: A Case Study
Virtualization enables the sharing of a same wireless sensor network (WSN) by
multiple applications. However, in heterogeneous environments, virtualized
wireless sensor networks (VWSN) raises new challenges such as the need for
on-the-fly, dynamic, elastic and scalable provisioning of gateways. Network
Functions Virtualization (NFV) is an emerging paradigm that can certainly aid
in tackling these new challenges. It leverages standard virtualization
technology to consolidate special-purpose network elements on top of commodity
hardware. This article presents a case study on NFV based gateways for VWSNs.
In the study, a VWSN gateway provider, operates and manages an NFV based
infrastructure. We use two different brands of wireless sensors. The NFV
infrastructure makes possible the dynamic, elastic and scalable deployment of
gateway modules in this heterogeneous VWSN environment. The prototype built
with Openstack as platform is described
Lightweight Synchronization Algorithm with Self-Calibration for Industrial LORA Sensor Networks
Wireless sensor and actuator networks are gaining momentum in the era of
Industrial Internet of Things IIoT. The usage of the close-loop data from
sensors in the manufacturing chain is extending the common monitoring scenario
of the Wireless Sensors Networks WSN where data were just logged. In this paper
we present an accurate timing synchronization for TDMA implemented on the state
of art IoT radio, such as LoRa, that is a good solution in industrial
environments for its high robustness. Experimental results show how it is
possible to modulate the drift correction and keep the synchronization error
within the requirements
The algebro-geometric study of range maps
Localizing a radiant source is a widespread problem to many scientific and
technological research areas. E.g. localization based on range measurements
stays at the core of technologies like radar, sonar and wireless sensors
networks. In this manuscript we study in depth the model for source
localization based on range measurements obtained from the source signal, from
the point of view of algebraic geometry. In the case of three receivers, we
find unexpected connections between this problem and the geometry of Kummer's
and Cayley's surfaces. Our work gives new insights also on the localization
based on range differences.Comment: 38 pages, 18 figure
DEVELOPMENT OF A SCADA SYSTEM FOR ACCESS, PROCESSING AND SUPERVISION OF DATA COMING FROM A WIRELESS SENSORS NETWORK IN AGRO-ENVIRONMENTAL APPLICATIONS
Wireless sensors networks appeared in the 1970’s for military and
industrial use. They have since undergone a major evolution, particularly since the 90’s,
thanks to the improvements in wireless communications. These changes have allowed
them to participate in a wide variety of applications in different sectors such as
agriculture and environment. This paper shows the development of a SCADA application
programmed with LabVIEW® 8.6 (National Instruments), which allows management of
data received by wireless sensors networks through a friendly interface for users. For the
application shown in this paper we have worked with a MEP 510 sensors network
(Crossbow). The functionalities implemented are the following: Network configuration;
Data storage into database; Statistical processing of historical data with polynomial
adjustment and spline interpolation; Visualization by data graphics in real time and
historical data; Visualization of 2D intensity diagrams from the spatial distribution of
sensors; and Creation of a users registry system that allows, depending on the category
assigned, receiving or not access privileges in the application. As a complement we have
developed the possibility of remote access. Sensors network implemented and the
applications developed have been checked by operational tests for each functionality, as
well as sensors joining and leaving the network situations, range of variables and working
modes. The results obtained show the robustness of the SCADA application and the
limitations of wireless sensors networks operating on field conditions
Review of wireless sensors networks in health applications
Wireless Sensor Networks (WSN) are becoming
increasingly important for telemedicine applications, monitoring
patients both in the clinical setting and at home. They
reduce user discomfort, enhance mobility and reduce costs.
WSN are also fundamental in Ambient Assisted Living (AAL)
since these smart systems, which are tailored to users needs,
collect information about users and their ambient in order to
provide personalized feedback.
Despite the growing use of wireless communications in the
health domain and in AAL systems there is a lack of research
literature reviewing trials of these technologies. This paper
provides a systematic review of the use of WSN in the health
domain, presenting current WSN implementations. It covers
126 papers, of which 26 are studies, classified according to
inclusion criteria. There is presented a discussion about the
recent research conducted in the field.Junta de Andalucía p08-TIC-363
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