Omar Álvarez Cárdenas | Universidad de Colima (original) (raw)

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Papers by Omar Álvarez Cárdenas

Research paper thumbnail of Experimental analysis towards vehicular Ad-hoc networks

Presentamos en este trabajo resultados de medición y análisis realizado sobre importantes caracte... more Presentamos en este trabajo resultados de medición y análisis realizado sobre importantes características de modelos de propagación inalámbrica en Redes Ad-hoc Vehiculares (RAV) en autopistas: Efecto Doppler, propagación de las señales en espacio libre, ...

Research paper thumbnail of Performance analysis of routing strategies for wireless sensor networks Análisis del funcionamiento de estrategias de enrutamiento para redes de sensores inalámbricos

This paper presents a performance analysis of source, shortest path, hierarchical and geographica... more This paper presents a performance analysis of source, shortest path, hierarchical and geographical routing strategies, which are the three most commonly, implemented strategies employed by wireless ad-hoc and sensor networks. Source routing was selected because it does not require costly topology maintenance, while shortest path routing was chosen because of its simple discovery routing approach and hierarchical and geographical routing was elected because it uses location information via Global Positioning System (GPS). Many current applications require precise knowledge of physical positioning information, particularly in the areas of health, military, agriculture, robotics, and environmental and structural monitoring. Additionally, the shortest path routing technique was chosen because it is employed in several data-centric wireless sensor network algorithms such as Direct Diffusion, Rumor Routing, Gradient-Based Routing and the ZigBee standard. The performance of these three routing strategies is evaluated by providing simulation results based on latency, End to End Delay (EED), packet delivery ratio, routing overhead, overhead and routing load. Source routing only improves shortest path and hierarchical and geographical routing in terms of latency, hierarchical and geographical routing performs the worst because it must send hello packets in order to acquire and transmit location

Research paper thumbnail of Análisis del funcionamiento de estrategias de enrutamiento para redes de sensores inalámbricos

Revista Facultad De Ingenieria-universidad De Antioquia, 2010

This paper presents a performance analysis of source, shortest path, hierarchical and geographica... more This paper presents a performance analysis of source, shortest path, hierarchical and geographical routing strategies, which are the three most commonly, implemented strategies employed by wireless ad-hoc and sensor networks. Source routing was selected because it does not require costly topology maintenance, while shortest path routing was chosen because of its simple discovery routing approach and hierarchical and geographical routing was elected because it uses location information via Global Positioning System (GPS). Many current applications require precise knowledge of physical positioning information, particularly in the areas of health, military, agriculture, robotics, and environmental and structural monitoring. Additionally, the shortest path routing technique was chosen because it is employed in several data-centric wireless sensor network algorithms such as Direct Diffusion, Rumor Routing, Gradient-Based Routing and the ZigBee standard. The performance of these three rou...

Research paper thumbnail of Ethernet+ RPR+ MPLS: Una Opción Estratégica para la Convergencia en Redes Metropolitanas

iiisci.org

RESUMEN La convergencia de servicios en redes metropolitanas es uno de los retos que las tecnolog... more RESUMEN La convergencia de servicios en redes metropolitanas es uno de los retos que las tecnologías actuales deben enfrentar y resolver. Una de las opciones que prometen ser parte de estas soluciones es la integración de las familias Ethernet con las facilidades ...

Research paper thumbnail of Simulación de una WSN aplicada en entornos marinos

Telemática, 2018

La monitorizacion de entornos marinos se ha convertido en una prioridad ya que las actividades de... more La monitorizacion de entornos marinos se ha convertido en una prioridad ya que las actividades de los humanos lo estan destruyendo de forma gradual. En este trabajo se propone la simulacion de una red de sensores inalambrica ( WSN , por sus siglas en ingles) que podria ser implementada en entornos marinos costeros. En especifico, el articulo se centra en la capa MAC, evaluando el rendimiento de dos protocolos utilizados en este ambito: TMAC y SMAC. La propuesta presenta y compara ambos protocolos con respecto a tres variables: paquetes recibidos, retardo y consumo de energia, para analizar su eficiencia con relacion a confiabilidad, tiempo de respuesta y vida util del nodo. Se utilizan dos escenarios para su evaluacion: en el primero de ellos todos los nodos de la red son estaticos para evaluar el maximo desempeno que puede ser alcanzado por cada protocolo, mientras que en el segundo se anade a los nodos sensores movilidad que asemeja el comportamiento de las corrientes marinas para...

Research paper thumbnail of Embedded System Using GNU/Linux for Automating Low Earth Orbit Satellite Tracking

Theory and Practical Applications, 2012

Research paper thumbnail of Performance analysis of routing strategies for wireless sensor networks

Revista Facultad De Ingenieria Universidad De Antioquia, 2010

This paper presents a performance analysis of source, shortest path, hierarchical and geographica... more This paper presents a performance analysis of source, shortest path, hierarchical and geographical routing strategies, which are the three most commonly, implemented strategies employed by wireless ad-hoc and sensor networks. Source routing was selected because it does not require costly topology maintenance, while shortest path routing was chosen because of its simple discovery routing approach and hierarchical and geographical routing was elected because it uses location information via Global Positioning System (GPS). Many current applications require precise knowledge of physical positioning information, particularly in the areas of health, military, agriculture, robotics, and environmental and structural monitoring. Additionally, the shortest path routing technique was chosen because it is employed in several data-centric wireless sensor network algorithms such as Direct Diffusion, Rumor Routing, Gradient-Based Routing and the ZigBee standard. The performance of these three routing strategies is evaluated by providing simulation results based on latency, End to End Delay (EED), packet delivery ratio, routing overhead, overhead and routing load. Source routing only improves shortest path and hierarchical and geographical routing in terms of latency, hierarchical and geographical routing performs the worst because it must send hello packets in order to acquire and transmit location

Research paper thumbnail of Analysis of Propagation Models, Delay, and Throughput for WiMAX in Urban Environments

This chapter presents a theoretical and experimental analysis of the electromagnetic signal propa... more This chapter presents a theoretical and experimental analysis of the electromagnetic signal propagation between a base station and a subscriber station in an urban setting using the IEEE 802.16d standard and test bed results, which are then compared to Ergeg's (1998) modified version of the Hata-Okomura (1980) mathematical propagation model. The experimental results of the measurements are similar to the model using the type terrain Category B (Suburban). Additionally, under experimental conditions, equipment with technology IEEE 802.16d and IEEE 802.16e were used to analyze delay and throughput while data, voice, and video was transmitted. The tests show that delay is acceptable for Fixed WiMAX, although it is barely adequate for Mobile WiMAX. As far as throughput is concerned, the average rate is adequate to support applications that include data, voice, and video.

Research paper thumbnail of Experimental analysis towards vehicular Ad-hoc networks

Presentamos en este trabajo resultados de medición y análisis realizado sobre importantes caracte... more Presentamos en este trabajo resultados de medición y análisis realizado sobre importantes características de modelos de propagación inalámbrica en Redes Ad-hoc Vehiculares (RAV) en autopistas: Efecto Doppler, propagación de las señales en espacio libre, ...

Research paper thumbnail of Performance analysis of routing strategies for wireless sensor networks Análisis del funcionamiento de estrategias de enrutamiento para redes de sensores inalámbricos

This paper presents a performance analysis of source, shortest path, hierarchical and geographica... more This paper presents a performance analysis of source, shortest path, hierarchical and geographical routing strategies, which are the three most commonly, implemented strategies employed by wireless ad-hoc and sensor networks. Source routing was selected because it does not require costly topology maintenance, while shortest path routing was chosen because of its simple discovery routing approach and hierarchical and geographical routing was elected because it uses location information via Global Positioning System (GPS). Many current applications require precise knowledge of physical positioning information, particularly in the areas of health, military, agriculture, robotics, and environmental and structural monitoring. Additionally, the shortest path routing technique was chosen because it is employed in several data-centric wireless sensor network algorithms such as Direct Diffusion, Rumor Routing, Gradient-Based Routing and the ZigBee standard. The performance of these three routing strategies is evaluated by providing simulation results based on latency, End to End Delay (EED), packet delivery ratio, routing overhead, overhead and routing load. Source routing only improves shortest path and hierarchical and geographical routing in terms of latency, hierarchical and geographical routing performs the worst because it must send hello packets in order to acquire and transmit location

Research paper thumbnail of Análisis del funcionamiento de estrategias de enrutamiento para redes de sensores inalámbricos

Revista Facultad De Ingenieria-universidad De Antioquia, 2010

This paper presents a performance analysis of source, shortest path, hierarchical and geographica... more This paper presents a performance analysis of source, shortest path, hierarchical and geographical routing strategies, which are the three most commonly, implemented strategies employed by wireless ad-hoc and sensor networks. Source routing was selected because it does not require costly topology maintenance, while shortest path routing was chosen because of its simple discovery routing approach and hierarchical and geographical routing was elected because it uses location information via Global Positioning System (GPS). Many current applications require precise knowledge of physical positioning information, particularly in the areas of health, military, agriculture, robotics, and environmental and structural monitoring. Additionally, the shortest path routing technique was chosen because it is employed in several data-centric wireless sensor network algorithms such as Direct Diffusion, Rumor Routing, Gradient-Based Routing and the ZigBee standard. The performance of these three rou...

Research paper thumbnail of Ethernet+ RPR+ MPLS: Una Opción Estratégica para la Convergencia en Redes Metropolitanas

iiisci.org

RESUMEN La convergencia de servicios en redes metropolitanas es uno de los retos que las tecnolog... more RESUMEN La convergencia de servicios en redes metropolitanas es uno de los retos que las tecnologías actuales deben enfrentar y resolver. Una de las opciones que prometen ser parte de estas soluciones es la integración de las familias Ethernet con las facilidades ...

Research paper thumbnail of Simulación de una WSN aplicada en entornos marinos

Telemática, 2018

La monitorizacion de entornos marinos se ha convertido en una prioridad ya que las actividades de... more La monitorizacion de entornos marinos se ha convertido en una prioridad ya que las actividades de los humanos lo estan destruyendo de forma gradual. En este trabajo se propone la simulacion de una red de sensores inalambrica ( WSN , por sus siglas en ingles) que podria ser implementada en entornos marinos costeros. En especifico, el articulo se centra en la capa MAC, evaluando el rendimiento de dos protocolos utilizados en este ambito: TMAC y SMAC. La propuesta presenta y compara ambos protocolos con respecto a tres variables: paquetes recibidos, retardo y consumo de energia, para analizar su eficiencia con relacion a confiabilidad, tiempo de respuesta y vida util del nodo. Se utilizan dos escenarios para su evaluacion: en el primero de ellos todos los nodos de la red son estaticos para evaluar el maximo desempeno que puede ser alcanzado por cada protocolo, mientras que en el segundo se anade a los nodos sensores movilidad que asemeja el comportamiento de las corrientes marinas para...

Research paper thumbnail of Embedded System Using GNU/Linux for Automating Low Earth Orbit Satellite Tracking

Theory and Practical Applications, 2012

Research paper thumbnail of Performance analysis of routing strategies for wireless sensor networks

Revista Facultad De Ingenieria Universidad De Antioquia, 2010

This paper presents a performance analysis of source, shortest path, hierarchical and geographica... more This paper presents a performance analysis of source, shortest path, hierarchical and geographical routing strategies, which are the three most commonly, implemented strategies employed by wireless ad-hoc and sensor networks. Source routing was selected because it does not require costly topology maintenance, while shortest path routing was chosen because of its simple discovery routing approach and hierarchical and geographical routing was elected because it uses location information via Global Positioning System (GPS). Many current applications require precise knowledge of physical positioning information, particularly in the areas of health, military, agriculture, robotics, and environmental and structural monitoring. Additionally, the shortest path routing technique was chosen because it is employed in several data-centric wireless sensor network algorithms such as Direct Diffusion, Rumor Routing, Gradient-Based Routing and the ZigBee standard. The performance of these three routing strategies is evaluated by providing simulation results based on latency, End to End Delay (EED), packet delivery ratio, routing overhead, overhead and routing load. Source routing only improves shortest path and hierarchical and geographical routing in terms of latency, hierarchical and geographical routing performs the worst because it must send hello packets in order to acquire and transmit location

Research paper thumbnail of Analysis of Propagation Models, Delay, and Throughput for WiMAX in Urban Environments

This chapter presents a theoretical and experimental analysis of the electromagnetic signal propa... more This chapter presents a theoretical and experimental analysis of the electromagnetic signal propagation between a base station and a subscriber station in an urban setting using the IEEE 802.16d standard and test bed results, which are then compared to Ergeg's (1998) modified version of the Hata-Okomura (1980) mathematical propagation model. The experimental results of the measurements are similar to the model using the type terrain Category B (Suburban). Additionally, under experimental conditions, equipment with technology IEEE 802.16d and IEEE 802.16e were used to analyze delay and throughput while data, voice, and video was transmitted. The tests show that delay is acceptable for Fixed WiMAX, although it is barely adequate for Mobile WiMAX. As far as throughput is concerned, the average rate is adequate to support applications that include data, voice, and video.