Abstract
Satellites have been very successful for digital broadcast, and it is a natural step to develop IP multicast over satellite to explore the potential of the satellite systems. This paper discusses the issues of IP multicast over satellite, based on IP multicast protocols using different satellite communications systems including DVB-S and DVB-RCS. The paper provides an overview of the networking issues and their interactions. The work is based on the studies of the European IST GEOCAST project within the IST’s 5th Framework programme. The paper explains how IP multicast protocols can be implemented over satellite links, looking particularly at the issues involved in implementing IGMP, multicast routing protocols reliable multicast protocols, and security.
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