[e2e] low latency multicast trees

[Dirk Grunwald]

Jon Crowcroft wrote:
> nowadays we're starting to see soem serious multicast action out there in them thar woods,
> so maybe its time to re-visit low latency trees (I know most the stuff is IPTV and single
> source/streamed, but someone is gonna wanna do games any day now)
> --

I'm assuming you're referring to intra-AS multicast? My impression was 
that inter-AS multicast wasn't done because (largely) there's no revenue 
model for it.

I was also under the impression that most companies providing TV 
services were either using PON to duplicate & distribute the bulk of it, 
or, when using IP layer multicast, carefully engineering the 
provisioning network (as in the UTOPIA network - 
http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/35/32917/01541706.pdf 
)

Are companies really trying to distribute IPTV over the broader internet?