[nwcrg] Recent IPR disclosure against RFC 8681

Marie-Jose Montpetit <marie@mjmontpetit.com> Tue, 31 March 2020 16:45 UTC

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From: Marie-Jose Montpetit <marie@mjmontpetit.com>
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Cc: Vincent Roca <vincent.roca@inria.fr>, Colin Perkins <csp@csperkins.org>
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Subject: [nwcrg] Recent IPR disclosure against RFC 8681
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Dear NWCRG list members:

There was a recent IPR disclosure related to RFC 8681 - Sliding Window
Random Linear Code (RLC) Forward Erasure Correction (FEC) Schemes for
This refers to a patent that has me as co-inventor.  This disclosure puts
me in a delicate position as the patent co-inventor hence someone who
should have disclosed the IPR and at the same time as the NWCRG chair who
has been following the RLC development since 2015 and should be impartial.

(w/o chair hat on)
1. This patent was submitted following some work I did as an MIT researcher
in Muriel Médard’s laboratory and as such all my IPR is now owned by MIT
for them to license at will. It is the licensee that made the disclosure,
not MIT, not me or any of the patent co-inventors most of which have been
or are still involved in the NWCRG. I was not made aware of the disclosure
and have no relationship with the discloser but it puts me like I said in a
delicate position.

According to RFC 8179 I should have disclosed this IPR at the time of the
first ID in 2015 or throughout its evolution in the TSVWG from 2017-2019
and its presentations in the NWCRG meetings during that time if I felt that
it was related to the work of RFC 8681. I understand the rules of 8179 for
the need for timely disclosure. I did not disclose any IPR, as I did not
feel that there was a direct relationship between the patent and RLC from
its initial ID to the RFC. I also understand that the entity disclosing the
IPR does not agree with me.

As far as I am concerned, the work that lead to the patent, where I was
co-PI, was a master student thesis on using network coding (the MIT/Caltech
RLNC) as an alternative to some of the layer 2 reliability mechanisms in
WIMAX-2 networks with wider applicability to other wireless networks. The
patent in thus on a novel implementation of coding not a code development.

Since RFC 8681 is about developing a code with sliding windows and one
that compared to the RLNC used in the patent does not allow for
re-encoding. I believe our patent to be not directly related hence the
reason I never pointed to the IPR. Of course the field of applicability of
RFC 8681 includes wireless networks but also many others; applications are
not crux of the RFC 8681. As a co-inventor I would have welcomed the
discussion at our meetings or in private emails before the disclosures.

(with co-chair hat one)
2. Other co-inventors from MIT and now Harvard and the disclosing entity,
via one of their representatives, were present at almost every NWCRG
meetings throughout the development of the RLC since 2015 and are part of
our mailing list. Our patent or any other that are now disclosed against
RFC 8681 was pointed out as being related. Some of the concerned
participants even supported the RLC work. There is a rule in IETF that
is followed by the IRTF about "timely disclosures" of related IPR. I am
surprised that the disclosing entity took so long against the rule. And at
every meeting we emphasized the IPR rules.

Vincent and I welcome comments on this as we are strategizing for the
future of the group.


Marie-José Montpetit, Ph.D.