Scalable Application Layer Multicast
Scalable Application Layer Multicast
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Date
2002-08-01
Authors
Banerjee, Suman
Bhattacharjee, Bobby
Kommareddy, Christopher
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Abstract
We describe a new scalable application-layer multicast protocol,
specifically designed for low-bandwidth data streaming applications
with large receiver sets.
Our scheme is based upon a hierarchical clustering of the
application-layer multicast peers and can support a number of
different data delivery trees with desirable properties.
We present extensive simulations of both our protocol and the
Narada application-layer multicast protocol over Internet-like
topologies. Our results show that for groups of size 32 or more,
our protocol has lower link stress (by about 25%), improved or
similar end-to-end latencies and similar failure recovery
properties. More importantly, it is able to achieve these results by
using orders of magnitude lower control traffic.
Finally, we present results from our wide-area testbed in which we
experimented with 32-100 member groups distributed over 8 different
sites. In our experiments, average group members established and
maintained low-latency paths and incurred a maximum packet loss rate
of less than 1% as members randomly joined and left the multicast
group. The average control overhead during our experiments was less
than 1 Kbps for groups of size 100.
Also UMIACS-TR-2002-53