Publication: Medidas de prestaciones en redes de sensores binarias bajo distintas estrategias de transmisión
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2009-06
Defense date
2009-06-26
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Abstract
El presente Proyecto Fin de Carrera consiste en un estudio de prestaciones en redes de sensores homogéneas y binarias, es decir, sensores con las mismas características y sensores en los que la información de sensado se reduce a la detección ó no de un determinado agente para aplicaciones de detección y localización a partir de medidas cuantitativas basadas en la teoría de la información. Para este tipo de redes de sensores se han aplicado los test de hipótesis para la detección del agente en un área a partir de las lecturas de los sensores en la misma, que una vez recolectadas son enviadas a un sistema central. Éste se encargará de generar una decisión global a partir de las decisiones particulares de cada uno de los sensores de la red. A la hora de simular el entorno de este proyecto se han utilizado distintos esquemas de transmisión con diferentes eficiencias de gasto energético (considerando redes de sensores con comunicaciones inalámbricas) y se han validado medidas teóricas de prestaciones a partir de simulaciones de una red de sensores. Ante el creciente auge de las redes de sensores se considera necesario que en la fase de diseño de las mismas se lleve a cabo un análisis exhaustivo de las distintas alternativas de configuración propuestas para cumplir con la máxima eficiencia el propósito de la red. Este proyecto presenta las herramientas necesarias para ahorrar el tiempo y los recursos que conllevan el análisis de las distintas alternativas y la simulación de la red completa, y obtener así las prestaciones de la red de una forma sencilla y rápida. El proyecto responde al siguiente esquema: comienza con una exposición de los principios fundamentales de la teoría de la detección clásica considerando los antecedentes y el motivo de este proyecto. A continuación se repasa la teoría de la detección distribuida y las reglas de detección para los distintos escenarios considerados, para seguir con la exposición del método empleado para medir las prestaciones de una red de sensores. El resultado de las simulaciones ocupará el penúltimo gran bloque de este proyecto antes de las conclusiones finales y las líneas futuras de investigación consideradas en el marco de las redes de sensores distribuidas. _______________________________________________
The present Final Project consists in the study of the performance in binary homogenous sensor networks. A binary homogenous sensor network consists on sensors with the same capabilities that sense the environment and which outputs the detection or not detection of an agent. These kind of networks are predominant in detection and localization applications. We will focus on the measure of the performance using information theory knowledge. The test hypotheses theory has been applied to sensor networks aiming to detect the agent in an area from the sensor readings, that once they are gathered, they are sent to a central system. This central system will generate a global decision, from the particular decisions of each of the network sensors. Several transmission schemes with different energy consumption efficiencies (considering wireless sensor network communications) have been used in the simulation process of this work, and it has been validated the theoretical measures of the performance by the simulation of the sensor network. Because of today’s success of sensor networks, it is becoming necessary in the design phase an exhaustive analysis of the different alternative configurations to accomplish in the most efficient way the purpose of the network. This work presents the necessary tools to save time and resources that takes to analyze the different alternatives of the network and the simulation of the complete network, and therefore to obtain the performance of the network in an easy and fast manner. The project answers to the following structure: it begins with a presentation of the fundamental principles of the classic detection theory considering the antecedents and the reason for this project. Next we oversee the distributed detection theory for different scenarios. Coming up, we detail the statement used to measure the performances of the sensor network. The result of the simulations will be detailed in the next big block before the final conclusions and the future guidelines considering this project and the distributed sensor networks picture.
The present Final Project consists in the study of the performance in binary homogenous sensor networks. A binary homogenous sensor network consists on sensors with the same capabilities that sense the environment and which outputs the detection or not detection of an agent. These kind of networks are predominant in detection and localization applications. We will focus on the measure of the performance using information theory knowledge. The test hypotheses theory has been applied to sensor networks aiming to detect the agent in an area from the sensor readings, that once they are gathered, they are sent to a central system. This central system will generate a global decision, from the particular decisions of each of the network sensors. Several transmission schemes with different energy consumption efficiencies (considering wireless sensor network communications) have been used in the simulation process of this work, and it has been validated the theoretical measures of the performance by the simulation of the sensor network. Because of today’s success of sensor networks, it is becoming necessary in the design phase an exhaustive analysis of the different alternative configurations to accomplish in the most efficient way the purpose of the network. This work presents the necessary tools to save time and resources that takes to analyze the different alternatives of the network and the simulation of the complete network, and therefore to obtain the performance of the network in an easy and fast manner. The project answers to the following structure: it begins with a presentation of the fundamental principles of the classic detection theory considering the antecedents and the reason for this project. Next we oversee the distributed detection theory for different scenarios. Coming up, we detail the statement used to measure the performances of the sensor network. The result of the simulations will be detailed in the next big block before the final conclusions and the future guidelines considering this project and the distributed sensor networks picture.
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Redes de comunicación, Radiocomunicación, Sensores