CHARMS: Cooperative hybrid architecture for relaying multicast satellite streams to sites without a satellite receiver

Abstract

This paper describes an architecture dedicated to the terrestrial relaying of a real-time IP multicast audio-video stream broadcasted by a satellite. Such relaying is performed by nodes equipped with both a satellite receiver and a terrestrial Internet link. The stream is requested and obtained by sites that are not equipped with satellite receiving hardware but are nonetheless willing to receive it. By exploiting the properties of satellite transmission and adopting an hybrid satellite/terrestrial, multicast/unicast approach the described architecture allows to overcome the restrictions suffered by multicast traffic in the global Internet, allowing it to scale easily across autonomous systems.

Large-Scale Terrestrial Relaying of Satellite Broadcasted Real-Time Multimedia Streams

“…Among the works published on the subject of Satellite-Terrestrial Hybrid Networks we believe the closest to our researches are [7][8][9] [21]. They try to simultaneously exploit the benefits of the two types of networks (i.e.…”

“…The proposed architecture has been inspired from the routine operations of an infrastructure called Campus Satellitare del Salento, CSS [5][6] [7][8] [9].…”

Multicast Security and Reliable Transport of Rekey messages over Hybrid Satellite/Terrestrial Networks

“…Many methods to overcome this limitation have been proposed (Eriksson, 1994) (MBONED, 2011 (Sardella, 2005) but none of them has proved very successful until now. A natural way to transmit IP multicast over a large geographical area is satellite broadcasting (Tommasi et al, 2010) (Tommasi & C.Melle, 2011). Among the many applications made possible by the multicast model are those for which security is a critical requirement.…”

OpenSatRelaying: a Hybrid Approach to Real-Time Audio-Video Distribution over the Internet

“…These observations and the desire to find a way to exploit the extraordinary power of satellite for the purpose of large-scale live audio-video streaming led to the design of the "Cooperative Hybrid Architecture for Relaying Multimedia Satellite Streams" architecture (CHARMS) [3], [4], prompted by the needs of the "Campus Satellitare del Salento" (CSS) [5], a platform for large-scale synchronous distance-learning. The basic idea is: the satellite multicasts an IP live stream over a large geographical area and a number (the higher the better) of hosts equipped for reception relay the stream to other peers by the terrestrial Internet.…”