76 research outputs found
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
Laboratorio para el estudio experimental del comportamiento de una red Ethernet
Este documento describe el laboratorio utilizado en las asignaturas de Arquitectura de Redes
I y II y Comunicaciones I y II de cuarto de Ingeniería Informática y segundo de Ingeniería
Técnica de Gestión para caracterizar el comportamiento de un red ethernet
ESTELLE: A Method to Analyze Automatically the Performance of Telecontrol Protocols in SCADA Systems
This paper presents the use of ESTELLE, a formal
description technique, as a method to calculate automatically the
performance of telecontrol protocols in SCADAsystems. Some specific
primitives are added to the ESTELLE description language in
order to achieve that goal. As an example, we analyze the performance
of a telecontrol protocol. The results from this method are
compared to performance measurements obtained from analytical
and simulated solutionsMinisterio de Ciencia y Tecnología TIC 2000-111
Design and Implementation of a Prototype with a Standardized Interface for Transducers in Ambient Assisted Living
Solutions in the field of Ambient Assisted Living (AAL) do not generally use
standards to implement a communication interface between sensors and actuators. This makes
these applications isolated solutions because it is so difficult to integrate them into new or
existing systems. The objective of this research was to design and implement a prototype
with a standardized interface for sensors and actuators to facilitate the integration of
different solutions in the field of AAL. Our work is based on the roadmap defined by
AALIANCE, using motes with TinyOS telosb, 6LoWPAN, sensors, and the IEEE 21451
standard protocol. This prototype allows one to upgrade sensors to a smart status for easy
integration with new applications and already existing ones. The prototype has been
evaluated for autonomy and performance. As a use case, the prototype has been tested in a
serious game previously designed for people with mobility problems, and its advantages
and disadvantages have been analysed.Junta de Andalucía P08-TIC-363
Indoor Position System Based on a Zigbee Network
TAIS group has developed an indoor position system prototype based
on a fingerprint positioning algorithm. The prototype uses IEEE 802.15.4 mote
and BitCloud Stack, a full-featured ZigBee Compliant, second generation
embedded software stack from Atmel. The design requirements of the prototype
were only to determine the actual position in a room of a user in a building, so
the prototype accuracy is room accuracy. TAIS group decided to compete in the
second edition of EvAAL Competition. This paper presents all the step made to
adapt the prototype to the EvAAL environment, the found drawbacks and the
obtained results. One of the most important drawback was that the Smart House
Living Lab of the Polytechnic University of Madrid has only two rooms, the
required accuracy was meters (error less than or equal to 0,5 meters the higher
score, higher than 4 meters no score) and the room accuracy was substituted by
areas of interest so the behavior of our prototype was going to work was an
incognita.Junta de Andalucía p08-TIC-363
Simulación de un protocolo de nivel mac basado en IEEE 802.16 para el laboratorio de arquitectura de redes I
Este trabajo presenta nuestra experiencia en el desarrollo de una herramienta de simulación de
protocolos de nivel MAC basados en el estándar IEEE 802.16 [1]. El empleo de esta herramienta en el
laboratorio ayuda a los alumnos en el estudio y comprensión de protocolos de redes de última milla.
En particular, se ha definido un protocolo de nivel MAC para sistemas PLC outdoor que sigue algunas
de las descripciones para el protocolo MAN wireless descrito en la norma IEEE 802.16
Analysis of the Behavior of an Indoor Position System Based on Fingerprints and IEEE 802.15.4
This paper presents an analysis of the behaviour of an indoor position system based on fingerprints and IEEE 802.15.4 that has been adapted to be tested in a competition, called EvAAL (Evaluating AAL Systems through Competitive Benchmarking), hold both in Madrid (tests) and Eindhoven (results). The objectives of this analysis are to determine the best algorithm that should have been applied in order to obtain the best results in the competition to use them in other environments. Among the different combinations that can be applied, i.e., the way the signature database is filled in and the algorithm uses to determine the closest location point, the best results are obtained using a global signature database where each signature entry is calculated by the medium of samples signatures database and the closest location is determined by a centroid algorithm with the parameter c set to 1.3. In this way, the error made improves the one obtained in the EvAAL, which is reduced by 100 centimetres.Junta de Andalucía p08-TIC-363
Fingerprint indoor position system based on OpenMAC
This paper presents a work in progress for the developing of a fingerprint indoor position system based on
OpenMAC, an IEEE 802.15.4 embedded software implementation from Atmel to be used in different
scenarios like e_health, ambient living or smart building. The system is thought to work as another one that
we have yet developed but using the BitCloud Stack, a full-featured, second generation embedded software
stack from the same supplier, but improving it. The first steps followed up in the system development are
shown in this paper.Junta de Andalucía p08-TIC-363
Open and Flexible Embedded System Applied to Positioning and Telecontrol
This paper presents the development and testing of
an open and flexible embedded system applied to positioning and
telecontrol (OFESAPO) for outdoor applications. The system is
composed of a control center (CC) and a set of remote terminal
units (RTUs); the International Electrotechnical Commission
(IEC) 60870-5 series has been chosen for communication among
them. This is a standard protocol of real-time telecontrol applications.
The CC is a personal computer, and the RTUs are
based on open hardware and software. The RTU hardware is an
embedded system, i.e., a system-on-chip-type design using fieldprogrammable
gate array that has been programmed with the
open-core LEON running Linux operating system. For prototyping,
the GR-XC3S-1500 board has been used. As there is no open
source code available for the IEC standard protocols, an open
source code has also been implemented. Hence, both the hardware
and the software are open source in OFESAPO. Several tests have
been made to show the system’s limitations and the suitability for
real-time applications. A prototype has also been tested in a real
environment, where the real position of two moving RTUs was
shown by a CC using Google Map.Junta de Andalucía p08-TIC-363
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