IETF 111 NWCRG Meeting Minutes (v0)

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nwcrg online meeting

Online meeting on Thursday July 29, 2021, 22:00-23:00 (UTC) Thursday Session III
Time Zone Conversion:

Participation will take place through Meetecho (please connect in advance):
- Meetecho participant guide
- links to Meetecho sessions

00- Welcome, administrative and general matters

(Chairs) (5')

This last meeting is the right time to highlight what happened in our RG since its creation, a bit more than 8 years ago.

01- NWCRG, status after 8 1/2 years (2013 - 2021)

(Chairs, all)

NB: transcription of the slides presented during IETF111

Key events and RFC publications

• 2013-02: 1st meeting during IETF 86, NWCRG launch, Brian and Victor co-chairs, Lars E. IRTF chair
• 2016-10: Vincent new co-chair, Allison M. IRTF chair
• 2017-09 Marie-Jose new co-chair, new RG acronym expansion: "coding for efficient NC"
• 2018-06: publication of RFC 8406, "NC Taxonomy"
• 2021-01: publication of RFC 8975, "NC for satellites"
• 2021-03: "NC for CCN" I-D sent to IRSG
• 2021-07: "Coding & CC" I-D sent to IRSG
• 2021-07: last meeting during IETF 111
• 2021-09: "BATS" to be sent to IRSG "tentative)

Three additional RFCs

2020-01: publication of three RFC, all of them managed by the IETF TSV WG but initiated within NWCRG:

• RFC 8680: "FECFRAME extension for sliding window codes
• RFC 8681: "sliding window RLC codes"
• RFC 8682: "TinyMT32 PRNG

But also controversy

• After 8 years of silent participation to NWCRG/TSVWG (no IPR disclosure), on March 2020 CodeOn disclosed a patent against RFC 8681 "Sliding window RLC FEC schemes for FECFRAME", soon after the RFC being published:
  [https://datatracker.ietf.org/ipr/4069/]

• Pretty uncomfortable situation as MJM is listed as co-inventor but convinced this IP does not apply to RFC 8681:
  [https://mailarchive.ietf.org/arch/msg/nwcrg/n4DeGM_4xRzQChPX7NQ9CUmThvo/]

• Full support of IRSG chair and several NWCRG participants towards MJM:
  [https://mailarchive.ietf.org/arch/msg/nwcrg/vk_7y3JyPSWJdXNkCcs3EdOegaY/]

And a few regrets

• no "Random Linear Network Coding" with in-network recoding RFC (!): two I-D initiated by CodeOn, but never finalized.
  BTW CodeOn explained (June 2018) they had no reason disclosure any IPR for this doc:
  [https://mailarchive.ietf.org/arch/msg/nwcrg/1hMBDR4XLE0cXbj4BOGhW5doYU0/]

• no Tetrys RFC: an I-D initiated but never finalized

• no "FEC for QUIC" nor "RLC for QUIC" RFC:
  QUIC v1 RFC publication took too long, and lack of resources within the team:
  [https://datatracker.ietf.org/doc/draft-swett-nwcrg-coding-for-quic/]
  [https://datatracker.ietf.org/doc/draft-roca-nwcrg-rlc-fec-scheme-for-quic/]

• SWIF (sliding window FEC codec) hackathon project:
  almost done, but not finalized because of lack of resources and difficulties with remote hackathon:
  [https://github.com/irtf-nwcrg/swif-codec]

What’s next?

• IRSG processing of:
  [https://datatracker.ietf.org/doc/draft-irtf-nwcrg-nwc-ccn-reqs/]
  [https://datatracker.ietf.org/doc/draft-irtf-nwcrg-coding-and-congestion/]

• BATS codes:
  RG LC remains to be done but I-D has already been carefully reviewed (soon to start)
  then IRSG processing (September?)

We’re almost done, this is our last meeting, thank you all, it was a pleasure!