Multicasting over Overlay Networks - A Critical Review

Abstract

-Multicasting technology uses the minimum network resources to serve multiple clients by duplicating the data packets at the closest possible point to the clients. This way at most only one data packets travels down a network link at any one time irrespective of how many clients receive this packet. Traditionally multicasting has been implemented over a specialized network built using multicast routers. This kind of network has the drawback of requiring the deployment of special routers that are more expensive than ordinary routers. Recently there is new interest in delivering multicast traffic over application layer overlay networks. Application layer overlay networks though built on top of the physical network, behave like an independent virtual network made up of only logical links between the nodes. Several authors have proposed systems, mechanisms and protocols for the implementation of multicast media streaming over overlay networks. In this paper, the author takes a critical look at these systems and mechanism with special reference to their strengths and weaknesses.

Topologías para la distribución de contenidos en redes de comunicación

“…La distribución del flujo original hasta cada uno de esos supernodos o nodos fuente de los grafos de distribución está fuera del propósito de este estudio. Como posible solución, con todo, puede plantearse una distribución multicast IP o alguna de las soluciones de multicast P2P sobre el nivel de aplicación propuestas en la literatura [6], entre las que se cuenta la que aquí se expone en el Capítulo 6.…”