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RE: IPR Disclosure Deutsche Telekom AG's Statement about IPR related to draft-ietf-6man-ipv6only-flag

"Lubashev, Igor" <ilubashe@akamai.com> Thu, 06 December 2018 21:20 UTC

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From: "Lubashev, Igor" <ilubashe@akamai.com>
To: Mark Smith <markzzzsmith@gmail.com>, Bob Hinden <bob.hinden@gmail.com>
CC: 6man WG <ipv6@ietf.org>
Subject: RE: IPR Disclosure Deutsche Telekom AG's Statement about IPR related to draft-ietf-6man-ipv6only-flag
Thread-Topic: IPR Disclosure Deutsche Telekom AG's Statement about IPR related to draft-ietf-6man-ipv6only-flag
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Date: Thu, 06 Dec 2018 21:16:20 +0000
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That's how I'd read the claims, too.  Adding to the list:

* All ICMP error messages

* ECN

* IEEE 802.3x Pause frames (though maybe not covering dependent claims requiring non-directly connected nodes)


Claim 8 claims a policy/signal info that travels from the receiver to the sender in a "protected" manner.  It could be argued that abovementioned signals traveling over IPSec tunnels and/or encrypted L2 links qualify as prior art, too.


"TCP windowing" and "ECN" (and "pause frames") seem especially valuable prior art for Claims 7 & 12, since they work in both directions concurrently.


- Igor


> -----Original Message-----
> From: Mark Smith <markzzzsmith@gmail.com>
> Sent: Thursday, December 06, 2018 3:07 PM
> To: Bob Hinden <bob.hinden@gmail.com>
> Cc: 6man WG <ipv6@ietf.org>
> Subject: Re: IPR Disclosure Deutsche Telekom AG's Statement about IPR
> related to draft-ietf-6man-ipv6only-flag
> 
> On Fri, 7 Dec 2018 at 04:45, Bob Hinden <bob.hinden@gmail.com> wrote:
> >
> > This is all surprising news to me (and I suspect Brian too).
> >
> 
> By my reading of the patent, it seems to be describing a mechanism where a
> possible packet receiver conveys a policy or signal to a sender, so the sender
> can delay or drop packets that the receiver knows or thinks won't be
> received or accepted.
> 
> https://patents.google.com/patent/EP2897333A1/en
> 
> I think a number of things would qualify as prior art for this patent, as they all
> existed well before 2014.
> 
> - TCP windowing
> 
> - IPv4 ICMP Source Quench
> 
> - BGP Outbound Route filters
> 
> 
> Regards,
> Mark.
> 
> 
> > Bob
> >
> >
> > > On Dec 6, 2018, at 8:53 AM, IETF Secretariat <ietf-ipr@ietf.org> wrote:
> > >
> > > Dear Bob Hinden, Brian E. Carpenter:
> > >
> > >
> > > An IPR disclosure that pertains to your Internet-Draft entitled
> > > "IPv6 Router Advertisement IPv6-Only Flag"
> > > (draft-ietf-6man-ipv6only-flag) was submitted to the IETF
> > > Secretariat on  and has been posted on the "IETF Page of Intellectual
> Property Rights Disclosures"
> > > (https://datatracker.ietf.org/ipr/3356/). The title of the IPR
> > > disclosure is "Deutsche Telekom AG's Statement about IPR related to
> > > draft-ietf-6man-ipv6only-flag"
> > >
> > >
> > > Thank you
> > >
> > > IETF Secretariat
> >
> > --------------------------------------------------------------------
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> > ipv6@ietf.org
> > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> > --------------------------------------------------------------------
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