[Udpcast] updating video files via UDP cast???

[Jeff Gladnick]

I am doing a little research for an R&D project, and I wanted to see if 
I could use UDP cast to meet my needs.  I just discovered it 15 minutes 
ago, scoured the site for docs, and read everything i could.  So please 
bear with me :).

I will have to remotely control 15-30 PC's.  All will be identical, and 
each will have a wireless router attached to a lan card (on the 
computer).  Each PC will play video, and may take some basic I/O 
fuctions in the near future.

The pc's will be located inside of a gondola, like at a ski resort. 
There will be one computer at the bottom of the gondola line (in the 
little lift shack) that will be controlling the whole system.  This 
computer will be hooked up to the internet, and can be accessed remotely 
in order to update the entire system.

It is my impression, that the wifi network may not be able to be 
completely in touch with each other at all times.  Most gondola lines 
are about 4000-8000 feet in length, but can get as high as 14000 feet 
long in extreme cases.  I understand that I may be limited to a few 
"hops" over the wifi routers.

Questions:

1) Can UDP facilitate the updating of just certain files (all identical) 
to all pc's on the network.  Say, replace video1.mpg with video1.mpg (a 
new file)

2) If some pc's are out of range of bottom wifi router, what will happen 
when the update is attempted?



-- 
Jeff Gladnick