Publication: Diseño e implementacion de un sistema de vídeobajo demanda P2P
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2015-09
Defense date
2015-09-30
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Abstract
La distribución de vídeo bajo demanda (VoD), ha alcanzado una gran popularidad entre la comunidad online, convirtiéndose en nuestros días en una “killer application” dentro de Internet. El principal motivo, ha sido la flexibilidad y comodidad que ofrece este tipo de servicio, permitiendo al usuario interactuar con el contenido, pudiendo ver cualquier punto de un vídeo en cualquier momento.
Pero las aplicaciones de VoD son costosas para los proveedores de servicios debido a la carga que se genera en los servidores de vídeo, que obliga a proveer de una importante infraestructura en arquitecturas centralizadas cliente-servidor. Como una solución a este problema, en los últimos años se han realizado multitud de estudios que proponen el uso de arquitecturas entre iguales (peer to peer o P2P) en la distribución de VoD. Con el uso de estas redes P2P lo que se pretende, es aprovechar toda la capacidad de proceso, almacenamiento y ancho de banda sobrante de los ordenadores cliente interconectados a través de la red.
En este proyecto se verán diferentes arquitecturas de video bajo demanda (VoD) y se explicarán las arquitecturas P2P, para terminar exponiendo los principales problemas que se encuentran en los actuales sistemas de VoD P2P. Diseñaremos e implementaremos una aplicación que proporcione video bajo demanda, dentro de una arquitectura P2P. Esta aplicación contará con mecanismos que permitan verificar la autenticidad de los contenidos, se diseñará un proceso de selección del peer fuente, y se implementará un protocolo de comunicación entre los diferentes elementos del sistema.
The distribution of Video on Demand (VoD), has gained such popularity within the online community that now days, it has become a “killer application” in the Internet. The main reason for VoD success is the flexibility and comfort the service offers to the users allowing them to interact with the content which it can be watched at any point and at any time of the recorded video. But VoD applications are costly to service providers that are forced to invest on centralized infrastructure client-server architectures to hold the enormous streaming loads to the video servers. During the last years, various studies propose to mitigate this problem with the use of peer to peer architectures (P2P) distribution of VoD. With the use of these P2P networks the intent is to utilize the processing capacity, storage and excess bandwidth, of the client’s computers that are interconnected through the network. This project will cover different architectures of Video on Demand (VoD) and will explain P2P architecture, as well as exposing the main issues VoD P2P systems face these days. It will design and implement an application that provides video on demand by using P2P architecture. This application will include mechanisms to verify the authenticity of the contents, and the peer source selection process design. For intercommunicating elements among the system, a communications protocol will be implemented.
The distribution of Video on Demand (VoD), has gained such popularity within the online community that now days, it has become a “killer application” in the Internet. The main reason for VoD success is the flexibility and comfort the service offers to the users allowing them to interact with the content which it can be watched at any point and at any time of the recorded video. But VoD applications are costly to service providers that are forced to invest on centralized infrastructure client-server architectures to hold the enormous streaming loads to the video servers. During the last years, various studies propose to mitigate this problem with the use of peer to peer architectures (P2P) distribution of VoD. With the use of these P2P networks the intent is to utilize the processing capacity, storage and excess bandwidth, of the client’s computers that are interconnected through the network. This project will cover different architectures of Video on Demand (VoD) and will explain P2P architecture, as well as exposing the main issues VoD P2P systems face these days. It will design and implement an application that provides video on demand by using P2P architecture. This application will include mechanisms to verify the authenticity of the contents, and the peer source selection process design. For intercommunicating elements among the system, a communications protocol will be implemented.
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Keywords
Vídeo bajo Demanda, Peer to Peer, Segmento, Vídeo Streaming, Round Trip Time (RTT)