[R-C] [ledbat] LEDBAT vs RTCWeb

[Michael Welzl]

On Apr 20, 2012, at 2:23 PM, Jim Gettys wrote:

> On 04/20/2012 07:55 AM, Mirja Kuehlewind wrote:
>> Hi Randell,
>>
>> I didn't follow the whole discussion but regarding LEDBAT we have a  
>> TARGET
>> delay of max. 100ms. That means you can choose a smaller one. We've  
>> chosen
>> 100ms as a max as there is an ITU recommendation that 150 ms delay is
>> acceptable for most user voice applications and we wanted for sure  
>> stay below
>> that.
>
> 100 ms + 75ms speed of light delay across the US (or equivalent across
> Europe, for example) + 100ms at the receiving end....
>
> Of course, it's even worse between continents, even without broken  
> networks.
>
> Not so nice....

Not argueing about your point here (I agree that we have to fix the  
edge), but: LEDBAT is an end-to-end mechanism, so I think that the  
100ms reflect the total measured end-to-end delay.

Cheers,
Michael