Re: [rohc] RE: Default decompression algorithms

Hi:

I am aligned with Zhigang. I believe there is not need to define
a "default" or "mandatory" algorythm. If other organizations, 
like 3GPP, want to define such an algorythm, that is fine, but
please, don't do it here in the IETF.

I also agree with the requirement whereby a decompressor informs
the compressor of the algorythms that are already uploaded, and
therefore, don't need to be uploaded again. This is just to 
save bandwidth over the air interface and avoid unneeded uploads. 
I think this is a very valid requirement.

/Miguel

zhigang.c.liu@nokia.com wrote:
> 
> Folks,
> 
> Let's conclude this issue. We've spent too much time on this.
> 
> - We need a mechanism to allow the decompressor to announce the
> decompression code it can locally generate or it already
> has (see below). It seems most people agree with my proposal: http://www.cdt.luth.se/robhc/msg03642.html. That's all we need.
> 
> - Let's not call them "default" or "mandatory", at least not here
> in IETF. The choice is the compressor's. If its choice happens
> to be popular, then it can avoid sending it over the air using
> above mechanism. But that's it. Nothing more.
> 
> - Documentation of "well-known" decompression code is second
> priority to other things. It can be done either in IETF or 3GPP.
> But let's finish other more important things (e.g. security, state
> management) first in this WG.
> 
> - The issue is not even about documented code. The above mechanism
> is useful when multiple mobiles use the same code. Once the
> decompressor acquire one copy of the code from one mobile, there
> is no need to download the code later when another mobiles talk to
> the same decompressor in the network.
> 
> BR,
> Zhigang
> 
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-- 
Miguel-Angel Garcia                     Oy LM Ericsson AB
                                        Jorvas, Finland
mailto:Miguel.A.Garcia@ericsson.com     Phone:  +358 9 299 3553
mailto:Miguel.A.Garcia@piuha.net        Mobile: +358 40 5140002

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