Hello:
Multicast over satellite should not be a big deal for anyone, its being done in
several networks very effectively today. If however, you really want to use the
internet over satellite, then you are looking at deploying TCP Spoofing. We have
a TCP Spoofing implementation that selectively controls the acknowledgments that
must traverse the space link. Obviously, controlling the acknowledgments
tremendously increases the availability of bandwidth in these Asymmetric Data
Flow (ADF) networks, where typically we see a Fat Bit Pipe (the FBP) blasting
away at a Xmbps, while the in-band return, trickles back at 38.4kbps.
If you set it up correctly, you should be able to multicast to your hearts
content, while surfing the net
in the hundreds of kilobits/second, while watching a real time video, i.e.
distance learning, while you are still chugging away on all the legacy stuff in
the network.
Mitch
Joe Touch wrote:
> At 09:44 AM 7/29/98 -0400, Steve Goldstein wrote:
> >At 8:21 AM -0400 7/29/98, Martin Koyabe opined:
> >| Hi,
> >|
> >| The major issues in providing this has been asymmetry and high latency,
> >|unless trade-offs are done. Anyone with further info leads, I could look
> >|at apart from protocols supported by StarBurst and GlobalCast ?
> >|
> >| Martin.
> >
> >I cannot shed any light on this except to forward a press release that says
> >that StarBurst and Teleglobe will be using multicast for web warehouse push
> >via satellite multicast using Intelsat:
>
> We have a project at ISI supporting web push using multicast, adapted
> from Apache, that runs on FreeBSD. It currently uses AFDP for reliable
> multicast
> transport (which does not optimize for satellite), but that's a plug-
> replaceable component). It might be a useful place to play with some of these
> issues (there's an API, in particular, that's accessible from command line
> and remotely).
>
> More info, including a demo, is at:
>
> http://www.isi.edu/lsam
>
> Joe
>
> +------------------------------------------------------------------+
> | Federal IP Multicast SIG: [email protected] |
> | List maintenance: [email protected] |
> | List archive: http://www.antd.nist.gov/archives/fed-ip-mcast |
> +------------------------------------------------------------------+
This archive was generated by hypermail 2b29 : Mon Feb 14 2000 - 16:14:45 EST