Publication: Mecanismos de optimización cross-layer para el tráfico de vídeo en redes 4G
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2014-06
Defense date
2014-07-08
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Abstract
Los operadores y proveedores de servicios de todo el mundo han observado un
incremento significativo de vídeo en redes móviles así como un crecimiento en la demanda de
mayores tasas de transferencia sobre redes inalámbricas que, en muchos casos, sobrepasan
las ofertadas por tecnologías de última generación como el LTE. Comparado con el núcleo
de la red móvil, las congestiones ocurren de manera mas frecuente en los interfaces de red
inalámbricos por su naturaleza. La calidad de vídeo se ve dramáticamente degradada debido
a las congestiones y las variaciones de las condiciones del canal en las celdas, disminuyendo
la Quality-of-Experience (QoE) de los usuarios.
El proyecto europeo MultimEDia transport for mobIlE Video AppLications (MEDIE-
VAL) tiene como objetivo evolucionar la actual arquitectura de Internet móvil centrándose
en la optimización de los servicios de vídeo. Al combinar aspectos de movilidad en la red
CDN y mediante el diseño de las técnicas adecuadas de ingeniería de tráfico, trata de
responder a las limitaciones de la QoE en flujos de vídeo.
Esta arquitectura funciona sobre un sistema basado cross-layer junto a una codificación
de vídeo en capas, obteniendo así un uso mas eficiente del tráfico de vídeo en redes móviles.
Esta estrategia de gestión de tráfico se centra en la QoE en lugar de los parámetros
tradicionales de la Quality-of-Service (QoS). Las mejoras específicas de vídeo se introducen
en las diferentes capas de la pila de protocolos. Por otra parte, el enfoque de cross-layer
proporciona un soporte mejor de vídeo a un coste menor que las soluciones convencionales.
En este Trabajo Fin de Grado se describe la solución diseñada para proveer un servicio
mejorado de vídeo sobre redes inalámbricas enfocado a la QoE del usuario, así como el
montaje de una demostración que presenta la funcionalidad.
Operators and service providers around the world have observed a significant increase of video on mobile networks as well as an increase in the demand for higher transfer rates over wireless networks, in many cases, exceed those offered by latest technologies like LTE. Compared to the core of the mobile network congestions occur more frequently in the wireless network interfaces by its physical nature. The video quality is dramatically degraded due to congestion and variations in channel conditions in the cells, decreasing the Quality-of-Experience (QoE) of users. The European project MultimEDIa transport for mobile Video AppLications (MEDIE- VAL) aims to evolve the current architecture of mobile internet focusing on the optimiza- tion of video services. By combining aspects of mobility in the CDN and by designing the proper techniques of traffic engineering, seeks to answer the limitations of QoE in video streams. This architecture applies a cross-layer framework to efficiently handle video traffic in the mobile network. This traffic management strategy focuses on QoE rather than the traditional parameters of the Quality-of-Service (QoS). Specific video improvements are introduced in different layers of the protocol stack. Moreover, the approach cross-layer video provides a better support at a lower cost than conventional solutions. In this Bachelor Thesis is described the solution designed to provide an improved video service over wireless networks focused on QoE of user, as well as the installation of a demonstration that shows the solution functionality.
Operators and service providers around the world have observed a significant increase of video on mobile networks as well as an increase in the demand for higher transfer rates over wireless networks, in many cases, exceed those offered by latest technologies like LTE. Compared to the core of the mobile network congestions occur more frequently in the wireless network interfaces by its physical nature. The video quality is dramatically degraded due to congestion and variations in channel conditions in the cells, decreasing the Quality-of-Experience (QoE) of users. The European project MultimEDIa transport for mobile Video AppLications (MEDIE- VAL) aims to evolve the current architecture of mobile internet focusing on the optimiza- tion of video services. By combining aspects of mobility in the CDN and by designing the proper techniques of traffic engineering, seeks to answer the limitations of QoE in video streams. This architecture applies a cross-layer framework to efficiently handle video traffic in the mobile network. This traffic management strategy focuses on QoE rather than the traditional parameters of the Quality-of-Service (QoS). Specific video improvements are introduced in different layers of the protocol stack. Moreover, the approach cross-layer video provides a better support at a lower cost than conventional solutions. In this Bachelor Thesis is described the solution designed to provide an improved video service over wireless networks focused on QoE of user, as well as the installation of a demonstration that shows the solution functionality.
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Keywords
IPv6, Radiocomunicación, Redes móviles, Optimización, Video,