Re: [ipwave] Hidden terminal problem

[Alexandre Petrescu <[e-mail]>]

Le 16/04/2019 à 16:26, Charlie Perkins a écrit :
> Hello Alex,
> 
> Consider the following three nodes with radio links as shown:
> 
> A----------B----------C
> 
> Suppose that A and B are at 80% of their signal range, and also that B 
> and C are at 80% of their signal range.
> 
> So A and C are not in range.  So A is 'hidden' from C, and C is 'hidden' 
> from A.
> 
> That's the hidden terminal problem.  It's not specific to OCB or WiFi, 
> and it is not a hypothetical problem.  It's just physics. It's not at 
> all difficult to understand, but it is very important to understand.

Such an elegant (short, easy) problem on paper, and such hard to try in 
practice.


> One question below...
> 
> On 4/16/2019 3:18 AM, Alexandre Petrescu wrote:
>>
>> ...
> 
>>
>> I do not know how the hidden terminal problem works.  I feel like if I
>> start looking into it I will grow additional white hairs.  I feel like I
>> better avoid  it.
>>
>> I think other people have some experience with the hidden terminal
>> problem in non-OCB WiFi and 802.15.4.  I am listening to them.
>>
>> I think nobody has any experience with the hidden terminal problem in
>> OCB settings.  I have some doubts, but still I think it is almost nobody.
>>
>>
> I find this very surprising!  What do others think?
> 
> Regards,
> Charlie P.
> 
>