IPR & other considerations (RE: Subject: I-D ACTION:draft-clausen-ipdvb-enc-00.txt)

[<harri.hakulinen@nokia.com>]

Moro, (as they say in this town istead of hello)

> -----Original Message-----
> From: ext Gorry Fairhurst [mailto:gorry@erg.abdn.ac.uk]
> Sent: Friday, April 19, 2002 3:15 PM
> 
> harri.hakulinen@nokia.com wrote:
> > - Have you calculated, what is the actual efficiency
> >   gain compared to MPE (1 or 2 % ?) ?
> 
> Well, that depends... 
> First, processing COST is significantly smaller 
> - far fewer fields to process and decode.

I think that "processing cost" is really a non argument here.
In my opinnion the possible new encapsulation needs to have 
mandatory header compression support, and in that case that 
cost will anyway be much higher than with current MPE.

> Second, there is a small gain compared to the best case for MPE,
> and a much larger gain compared to the worst case (small packets,
> unpacked). 
> Some analysis of MPE was previously sent to this list at:
> http://www.erg.abdn.ac.uk/users/gorry/ip-dvb/docs/Overhead-Ana
> lysis.doc

It is totally different thing to recommend the use of section
packing of the existing standard than to propose a new standard ..

> > - Do you, by any change, know who has the IPR for the
> >   "MPLS label" in adaptation field ? 
> 
> Not sure what you mean...
 
By knowing something about "the state of art" in this subject,
I would classify that idea as very easy to patent. 

In the old DAVIC times some Japanese company proposed something
similar in the scope of PES for IP headers (instead of MPLS), 
but I don't remember anymore, what was the company and I am too
lazy to do patent search right now.

Bottom line(s)::

Be prepared to find some resistance towards solutions that are
possibly under heavy IPR, especially if that is owned by companies
that are outside of DVB/Etsi scope.

Minimum req. in this subject is to get "IETF IPR statements" from
authors, but in this case it doesn't necessarily help much, because
we don't know to what companies they may be connected.

//Harri

> > Br,
> > 
> > //Harri
> > 
> > > -----Original Message-----
> > > From: ext Gorry Fairhurst [mailto:gorry@erg.abdn.ac.uk]
> > > Sent: Friday, April 19, 2002 12:31 PM
> > > To: ip-dvb@erg.abdn.ac.uk
> > > Subject: Subject: I-D ACTION:draft-clausen-ipdvb-enc-00.txt
> > >
> > >
> > >
> > > Dear all,
> > >
> > > find below the first draft for a submission for a next
> > > generation encapsulation
> > > for IP over DVB.  All comments / corrections are welcome, 
> please  send
> > > to the
> > > authors or this list.
> > >
> > > Gorry Fairhurst
> > >
> > > -----------------
> > >
> > > From: Internet-Drafts@ietf.org
> > > Reply-To: Internet-Drafts@ietf.org
> > > Date: Thu, 18 Apr 2002 08:00:23 -0400
> > > To: IETF-Announce: ;
> > > Subject: I-D ACTION:draft-clausen-ipdvb-enc-00.txt
> > >
> > > A New Internet-Draft is available from the on-line Internet-Drafts
> > > directories.
> > >
> > >
> > >     Title        : Simple Encapsulation for transmission of
> > > IP datagrams
> > >                           over MPEG-2/DVB networks
> > >     Author(s)    : H. Clausen et al.
> > >     Filename    : draft-clausen-ipdvb-enc-00.txt
> > >     Pages        : 14
> > >     Date        : 17-Apr-02
> > >
> > > This document contains the Simple Encapsulation, a simple and lean
> > > encapsulation mechanism for the transport of IP Datagrams over ISO
> > > MPEG-2 Transport Streams (TS). The MPEG-2 TS has been widely
> > > accepted not only for providing digital TV services, but also as a
> > > subnetwork technology for building IP networks. One example is the
> > > Digital Video Broadcast (DVB), specified by standards published by
> > > the European Telecommunications Standards Institute (ETSI).
> > >
> > > A URL for this Internet-Draft is:
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