[MLB-WIRELESS] Nasa Tv over MW

[Peter Berrett]

Hi again

It turns out that Brismesh has streaming NASA TV. I must ask them how 
they did it.

http://www.jamestronics.com/brismesh/services/

cheers Peter



Tyson Clugg wrote:
>>> More importantly however what would happen if say 100 people all wanted
>>> to watch NASA TV at the same time on the network eg due to a shuttle
>>> launch? Would the streaming tv have to be carried 100 separate times
>>> across the network thus overloading the system or is there some way to
>>> distribute one signal across the network and people can just passively
>>> receive the streamed packets?
>>>       
>> You would need multicast, which means that all routers in the network 
>> need to support IGMP and one or more multicast routing 
>> protocols.  Otherwise it's one stream per user, which will kill the network.
>>     
>
> Multicast is already enabled on the MW network - we use it with our core
> routing protocol (OSPF).
>
> However, dynamic multicast is better suited to this sort of stream - if
> nobody is watching Nasa TV, then the multicast data would simply be
> wasting what little bandwidth we have.  Unfortunately, dynamic multicast
> protocols are still largely in the realm of academics.
>
> If someone can demonstrate dynamic multicast working correctly (initial
> testing with <5Kbps streams on the MW network, please!), and we can be
> assured that the overheads are small then I'd be happy to see this
> proceed.
>
> Cheers,
> Tyson Clugg.
>
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