Re: Broadcast Protocols
Re: Broadcast Protocols
- Subject: Re: Broadcast Protocols
- From: Jens Alfke <email@hidden>
- Date: Fri, 21 Sep 2012 14:09:39 -0700
On Sep 21, 2012, at 1:16 PM, Gordon Apple <email@hidden> wrote:
> Thanks to everyone for your replies. What I’m getting is that there is currently no way to do what I want over a classroom WiFI. My question is “why not?” You all have confirmed my suspicions that it is currently not possible using what is available today.
Um, how did we confirm that? What we said is that for true multicast you need to use UDP, and that multicast packets are more expensive than regular packets.
Two possibilities:
(1) Use multicast, send UDP packets, and verify that you’re not sending at a high enough rate that it causes problems.
(2) Advertise your service over Bonjour, then open individual TCP streams to every client that connects.
> Context: We have a very sophisticated classroom presentation system that is about to go beta. We currently capture the output to a file, but would like to also wirelessly stream it real-time to everyone in a classroom (and on the Internet). School networks and WiFi typically are inadequate to handle this. I was originally in hope that a separate local classroom WiFi router could made to handle it.
That sounds like kind of a big feature to add right before beta, in my opinion. Networking is hard, and real-time is hard.
—Jens
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