Re: [rtcweb] RTP usage: supporting RTP ECN?

[Magnus Westerlund <[e-mail]>]

On 2014-03-06 10:56, Huangyihong (Rachel) wrote:
> Hi,
> 
>  
> 
> draft-ietf-rtcweb-rtp-usage-12 doesn’t have any description regarding to
> RTP ECN RFC6679. I’m wondering why. But from my point of view, it’s
> worth some discussion. The usage of ECN is a trend though it is not
> universal in current network. Supporting it in browsers for RTP media
> transport may be good for future.
> 

Hi Rachel,
(as individual/author)

We did consider ECN for RTP and it was discussed a bit at the Stockholm
interim meeting in June 2012. My recollection of this is that the
complexity trade-off versus the potential gains and the risk for it
causing negative impact resulted in that we did not included it at this
stage.

I do think adding ECN would be a good thing, but we do need to know that
it is working reasonably well and provide a benefit sufficiently often.
I think the importance of AQM will enable more deployment of ECN also.
Thus enabling improved performance for real-time applications like
WebRTC based ones.

I would suggest that we revisit this question after the core set of
specifications have been done.

Cheers

Magnus Westerlund

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