Reliable multicast : where to use FEC

Nonnenmacher, Jörg; Biersack, Ernst W
PFHSN 1996, 5th international Workshop on Protocols for high-speed networks, 28-30 October 1996, Sophia Antipolis, France

The MBONE provides an infrastructure for multicast communication on the internet based
on IP. Several proposals have been made to create reliable multicast transport on top of the
MBONE structure. Nearly all research on reliable multicast protocols for the MBONE focuses
on ARQ error recovery. The counterpart of ARQ, FEC, does not guarantee 100% reliability but increases the reliability. The aim of this paper is to determine the best place in a multicast
tree for the use of FEC. We develop a framework that allows us to model analytically the impact of FEC on the average number of transmissions necessary to transmit a packet to all members of the multicast group. We look on different multicast tree topologies, different degrees of correlated loss in the multicast tree, different multicast group sizes and show the effect of FEC in terms of transmissions needed to achieve 100% reliability. We find that the shared part of the multicast tree is not always the best part to employ FEC.

Sophia Antipolis
Sécurité numérique
Eurecom Ref:
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