Re: [AVT] Last Call: <draft-ietf-avt-rapid-acquisition-for-rtp-15.txt> (Unicast-Based Rapid Acquisition of Multicast RTP Sessions) to Proposed Standard

[Magnus Westerlund <[e-mail]>]

Ali C. Begen (abegen) skrev 2010-10-06 17:53:
> 
> 
>> -----Original Message-----
>> From: Magnus Westerlund [mailto:[e-mail]]
>> Sent: Wednesday, October 06, 2010 10:21 AM
>> To: Ali C. Begen (abegen)
>> Cc: [e-mail]; [e-mail]
>> Subject: Re: Last Call: <draft-ietf-avt-rapid-acquisition-for-rtp-15.txt> (Unicast-Based Rapid Acquisition of Multicast RTP
>> Sessions) to Proposed Standard
>>
>> Hi,
>>
>> I would say that it is a failure of the design, to not make RAMS-R
>> updates work well. I see one fix that would seem easy to avoid these
>> problems. Create a new message type RAMS-U that is identical to RAMS-R
>> except the message type and restrict it to work on a ongoing burst. The
> 
> I don't think this is a good design choice. When the updates feature was desired by some folks, we only agreed to have it if it the messages still stayed "self-defining". Now, when a server receives a RAMS-U message but it does not have an ongoing burst since the first message (RAMS-R) was lost, it won't process it based on your definition.

Yes, you are right that design would have such a impact. It was clearly
not thought through in that dimension.

> 
>> other way is to rip out update for now to avoid having this obviously
>> broken mechanism stay in there. And if someone needs it in the future
>> then define it properly.
> 
> I think we can still keep the current text (about the update process) for those who are still planning to use it by putting a caution against such problems. Would that work for you?

I think such a warning is the minimal change. As it appears that I am
the only one that seems concerned despite the returning discussion of
this issue I will hesitantly accept that.

Cheers

Magnus Westerlund

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