These cases are what my student, Fouad Tobagi and I called the Hidden Terminal 
Problem (with the Busy Tone solution) back in 1975.

Len 


> On Aug 2, 2021, at 4:16 PM, David Lang <da...@lang.hm> wrote:
> 
> If you are going to setup a test environment for wifi, you need to include 
> the ability to make a fe cases that only happen with RF, not with wired 
> networks and are commonly overlooked
> 
> 1. station A can hear station B and C but they cannot hear each other
> 2. station A can hear station B but station B cannot hear station A 3. 
> station A can hear that station B is transmitting, but not with a strong 
> enough signal to decode the signal (yes in theory you can work around 
> interference, but in practice interference is still a real thing)
> 
> David Lang
> 

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