| Abstract | In this paper, we present Adaptive Smooth Simulcast Protocol (ASSP)
for simulcast transmission of multimedia data over best-effort networks. ASSP is a
new multiple-rate protocol that implements a single rate TCP-friendly protocol as
the underlying congestion control mechanism for each simulcast stream. The key
attributes of ASSP are: (a) TCP-friendly behavior, (b) adaptive per-stream trans-
mission rates, (c) adaptive scalability to large sets of receivers and (d) smooth
transmission rates that are suitable for multimedia applications. We evaluate the
performance of ASSP under an integrated simulation environment which combines
the measurements of both network and video performance metrics. We also com-
pare ASSP against other proposed solutions and the results demonstrate that the
performance of ASSP is significantly better than the tested solutions. Finally, ASSP
is a practical solution with very low implementation complexity for video trans-
mission over best-effort networks.
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