Re: [rtcweb] Comments on draft-ietf-rtcweb-data-channel-07

[Michael Tuexen <[e-mail]>]

On Feb 25, 2014, at 11:58 AM, Magnus Westerlund <[e-mail]> wrote:

> On 2014-02-23 10:54, Barry Dingle wrote:
>> In reference to your first _Section 1 comments_, I agree that we need to
>> clearly differentiate the SRTP media and the SCTP media. (Note - SRTP -
>> not RTP !)
> 
> So SRTP is an extension of RTP, in fact it is a profile, or rather two
> (RTP/SAVP or RTP/SAVPF). I wrote RTP because I meant no specific RTP
> configuration here, it can be any of the profiles and any of the
> extensions. I know and fully support that RTCWEB uses RTP/SAVPF for RTP
> transported media, however in the wider context and possible other usage
> of the defined mechanism this may or may not be true. Therefore I see a
> need to be generic in that discussion. If one want to emphasize the SRTP
> part, then use (S)RTP.
OK, I'll use (S)RTP media...

Best regards
Michael
> 
>> 
>> I agree that there could be real-time media that can be sent over SCTP
>> Channels are still meet the criteria for 'real-time' as being 'received
>> within a few hundred milliseconds of being generated' - see WebRTC
>> Overview section 2.4.
>> 
>> Maybe we need to differentiate the Channel types - and then refer to the
>> data going over those Channels. For instance,if we define "SRTP
>> Channels" and "SCTP Channels", we could then refer to 'SRTP Channel
>> media' which would have a specific meaning.
> 
> Well, around RTP we aren't discussing "channels" at all. Thus, this
> becomes very ambiguous to what it means, unless you have a definition to
> go along with it.
> 
> In the context of a PeerConnection we can have one or more RTP session.
> 
> Also, I don't know what an SCTP channel is. There is an SCTP
> association, which is something between two endpoints. On top of this we
> have the SCTP Data channels. So what are you missing or want from these
> definitions?
> 
> 
> Cheers
> 
> Magnus Westerlund
> 
> ----------------------------------------------------------------------
> Services, Media and Network features, Ericsson Research EAB/TXM
> ----------------------------------------------------------------------
> Ericsson AB                 | Phone  [phone]
> Färögatan 6                 | Mobile [phone]
> SE-164 80 Stockholm, Sweden | mailto: [e-mail]
> ----------------------------------------------------------------------
> 
> _______________________________________________
> rtcweb mailing list
> [e-mail]
> https://www.ietf.org/mailman/listinfo/rtcweb