Interim Meetings Schedule

2026-06-07 note: London interim agenda PUBLISHED + DTS consensus readout flips to “separate WG extension document”. Martin Duke posts “New Agenda for London” June 5 (“The revised agenda is posted… I shifted a bit more time to MOQT blockers”) and Mike English posts “London interim details” (logistics/remote). Day-1 interim-08 (June 11, 0900-1700 BST) is now almost entirely MOQT-blocker time: Administrivia (0930) · Concurrent Subscribe (Ian, 0945, #1633) · Object Range Filters (Mo, 1030, PR #1518) · Joining FETCH (Alan+Mo, 1045-1145, PR #1642) · Lunch w/ Tongyu demo (1145) · Request Blocking (Alan, 1230, #1519) · Other MOQT Issues (Alan+Ian, 1330-1430) · Next Interim Planning (Martin, 1430) · Other MOQT Issues cont. (Alan+Ian, 1500-1600) · SWITCH/DTS Implementation Lessons (Ali, 1600-1700). SWITCH/DTS is demoted to a 1-hour Ali report at the tail of Day-1 — no longer the centerpiece it was at the May 26 interim. Day-2 (interim-10 morning + interim-11 afternoon, June 12) is still “dependent on the outcome of the SWITCH consensus call”: morning = Interop Report (Mike) + DOS Design-team readout (Mike, draft-englishm-moq-relay-dos) + conditional SWITCH Issues (Gwendal) / DTS Issues (Will); afternoon two branches, both keeping MSF/CMSF (Will) + Privacy Pass (Suhas) + Secure Objects (Cullen) + LOC (Mo), the not-incorporated branch adding CDN Provisioning (Mike) + MSFTS (Gwendal). LOCMAF and catalog-format are not on either agenda. DTS consensus readout: the chairs conclude “strong consensus for DTS to be adopted as an extension described by a WG document” (not base-spec integration) and invite Will Law to publish wilaw/dts4moq as draft-ietf-moq-dts4moq; Cullen Jennings June 6 contests the readout (“How did you reach the conclusion that there is consensus this should be an extension instead of in the MoQT draft?“) — a reversal of the late-May integration trajectory (Cullen had argued against a separate draft). SWITCH (PR #1378, updated June 5) remains under discussion with conditional Day-2 slots. See moq-transport + discussions-2026-06.

2026-05-30 note: Ali C. Begen May 29 10:02:29 UTC becomes 4th explicit on-list YES vote on SWITCH/DTS consensus call (archive). “(1) Should the Working Group adopt the contents of this work in some form? YES; (2) If yes, should the contents of this work be incorporated into the MOQT draft (as opposed to an extension draft)? YES with a note below.” — would accept “a separate normative RFC and published together with the MOQT draft” if necessary. Footnote: “my team has already implemented both [SWITCH and DTS] in MOQtail and plans to share implementation results with the working group”. Cumulative public on-list vote tally heading into June 4 close: Will Law (May 26 Yes/Yes/Yes/Yes) + Gwendal Simon (May 28 YES/YES + DTS reservations) + Yu You/Nokia (May 29 YES/YES + measured benefit numbers) + Ali Begen (May 29 YES/YES + moqtail implementation) = 4 explicit YES votes, 0 NO votes, 6 days before close. 3 of 4 SWITCH co-authors (Will Law, Gwendal Simon, Ali Begen) and the only on-list implementation reporter from a non-co-author team (Nokia) have all publicly voted YES. Open integration question: PR against moq-transport-18 (Cullen May 27 preference) or separate companion RFC (Ali Begen May 29 “if necessary” framing). The chair (Martin Duke) has not posted a position on the integration question since his May 26 “Thoughts on SWITCH” technical analysis. June 4 close substantively decided — the London interim formal slot now becomes draft-text-and-PR-merge mechanical work rather than continued adoption debate.

2026-05-29 note: Nokia becomes 5th independent SWITCH implementer with measured benefit report — public vote tally now favors adoption + integration. Gwendal Simon May 28 14:08:56 UTC Re: Consensus Call: DTS and SWITCH: YES on DTS adoption with scope reservations (DTS lacks normative bandwidth-measurement guidance + requires relays to fetch all renditions while forwarding one which “moves away from the lightweight, stateless, horizontally scalable model needed for CDN deployment”; recommends “focused, proportionate PR” not full chapter); YES/YES on SWITCH (real OTT operational need, current 4-message switching insufficient, no objection demonstrates concrete harm). Yu You (Nokia) May 29 05:59:04 UTC Re: Consensus Call: DTS and SWITCH: Nokia implemented SWITCH PR #1378 with measured positive results — “the first object arrival time significantly reduced compared to naive track re-subscription, and catch-up objects using fetch headers over separate unistreams functioned as intended”; YES/YES on both SWITCH and DTS adoption + integration into MOQT draft. Nokia = 5th independent team after Gwendal’s May 27 count of 4 — first on-list public implementation report with measured benefit numbers. Combined vote tally heading into June 4 close: Gwendal YES/YES + Will Law Yes/Yes/Yes/Yes + Yu You/Nokia YES/YES on SWITCH adoption + integration — public on-list vote substantively favors SWITCH adoption with integration into the main MOQT draft. Structural significance: the WG’s consensus-call pattern is now being supplemented by public implementation evidence on-list before close — implementation reports move from “carry to interim” to “post on list before close” status, accelerating decision cycles. Carry-forward: with the June 4 close substantively decided ahead of the formal deadline, the June 11-12 London interim formal slot now becomes draft-text-and-PR-merge mechanical work rather than continued adoption debate for SWITCH. DTS remains contested: Gwendal’s reservations on DTS scope are not addressed by Nokia’s vote, and Cisco’s Cullen Jennings May 24 agenda critique still stands as the procedural counter-position to a “full DTS chapter in MOQT” outcome.

2026-05-28 note: Two senior contributors push back on chair-side procedural framing within 24h. Gwendal Simon May 27 10:58 UTC disputes Martin Duke’s “Thoughts on SWITCH” framing with 4 points: (1) down-switch is actually 4 messages not 3 (REQUEST_UPDATE + SUBSCRIBE + Absolute Joining FETCH + REQUEST_UPDATE priority reset) with break-before-make hard-freeze vulnerability; (2) up-switch group N+k selection requires relay-side info subscribers cannot compute; (3) SWITCH is additive not replacive; (4) 4 independent teams have implemented/explored SWITCH = real OTT Live TV demand. First strong technical rebuttal of the chair’s May 26 framing — Martin Duke missed the 4-message hard-freeze risk and underweighted relay-side N+k computation. Cullen Fluffy Jennings May 27 19:26 UTC rejects Magnus Westerlund’s suggestion to move Track Filters + Top-N to a separate Internet-Draft extension: “I disagree it should be done as a separate draft. I think it should be worked as a PR that can be discussed in context” — references DTS experience as evidence off-base-spec extension drafts create unnecessary confusion. Pattern: with Martin Duke’s “I don’t have strong opinions” posture from May 26 leaving room for technical rebuttal, the mailing list is now actively re-running the May 26 interim outcome before the formal June 4 close — Gwendal’s rebuttal effectively raises a “current draft is broken for OTT Live TV” signal alongside Will Law’s Yes/Yes vote, while Cullen rejects the procedural escape hatch (separate draft) that the chairs may have wanted to keep available for managing London agenda load. Carry-forward: with the May 26 interim outcome yet to publish on list and June 4 / June 5 consensus closes ahead of London June 11-12, the chair-neutral posture is structurally becoming a venue for contributors to drive technical disposition through direct rebuttal rather than chair-tinted facilitation.

2026-05-27 note: Martin Duke posts first chair technical position on the May 21 SWITCH consensus call — “[Moq] Thoughts on SWITCH” May 26 17:33 UTC (archive) + self-reply 18:08 UTC. Quoted summary: the current 3-step UNSUBSCRIBE+SUBSCRIBE+Absolute Joining FETCH approach is identical to SWITCH when the relay has cache, but SWITCH continues delivering the high-bandwidth track until upstream content arrives vs Absolute Joining FETCH which terminates the old track immediately; for up-switch suggests SUBSCRIBE+Absolute Joining FETCH with delayed-close of the low-bandwidth track as a make-before-break strategy. Critically, the chair doesn’t commit to a position (“I don’t have strong opinions, but I do think the trade-off analysis here is correct”) — leaves room for the May 26 show-of-hands to drive the disposition. Will Law votes Yes/Yes/Yes/Yes on DTS+SWITCH adoption + integration (archive May 26 17:50 UTC) — first explicit on-list vote from a SWITCH co-author (Will Law co-authored SWITCH PR #1378 with Gwendal Simon + Ali Begen + Zafer Gürel). Mo Zanaty endorses both filter consensus calls May 27 00:31-01:00 UTC: “I support Object Range Filters in MOQT” (archive) + “I’m very keen to hear, discuss, and resolve any technical concerns… My primary concern is finalizing the desired behavior, regardless of whether this lands in MOQT or an extension” on Track Filters/Top-N (archive). Continues the Cullen-Mo “more filters less of everything else” convergence pattern. Combined with Will Law’s same-day yes-vote and Martin Duke’s chair analysis, the May 26 interim window will have to resolve a “filters vs SWITCH/DTS vs make-before-break vs MSF/CMSF” agenda-priority tension that the May 21 final agenda already had pre-baked. Structural significance: this is the chair (Martin Duke) doing active substance contribution to consensus, not just procedural facilitation — the moq-wg’s chair-cadence has now matured from “schedule and moderate” (Apr-May 2026) to “scheduling + interim outcomes + technical position-taking” (late May 2026).

2026-05-26 note: Martin Duke schedules June 22 + July 6 virtual interims in the Upcoming Virtual Interims mailing-list message May 25 17:44 UTC. Both 16:30–18:00 UTC, between London (June 9-12) and Vienna IETF. Feedback deadline June 8 — “the day before London begins”. First post-London interim cadence announcement. The cascading consensus-call deadlines (May 26 Object Filters close + DTS/SWITCH show-of-hands → June 4 DTS/SWITCH close → June 5 Filters close → June 11-12 London formal) all close before June 22, making June 22 the first interim after all four consensus calls are resolved. The 6-week London → June 22 → July 6 → Vienna cadence mirrors the Apr 27 (interim-14) → May 26 (interim-16) two-interims-in-the-gap pacing.

2026-05-25 note: Cullen Jennings (Cisco) publishes the first agenda-skeptic letter on the May 21 final London agenda May 24 14:27 UTC — “I do not think we will make any progress with this agenda. Every topic on it does not have enough time for any meaningful discussion to resolve the issues.”; recommends “pick a limited set of important topics that needs face to face time and finish them”; identifies filters / top N as his London priority. Aligns with Mo Zanaty’s dominant Object Filters mailing-list voice (3-of-4 messages May 23-24). Two senior contributors converging on “more filters, less of everything else” within 48 hours of the final agenda publication. If Martin Duke concedes agenda repacking after the May 26 interim, the targets are afrind’s 180-min MOQT-issues block and Will Law’s 35-min MSF/CMSF slot.

Upcoming Meetings

Meeting	Date	Agenda Notes
interim-2026-moq-15	2026-05-11
interim-2026-moq-16	2026-05-26	SWITCH/DTS show-of-hands meeting — Martin Duke May 21 17:19 UTC: “almost the entire balance of Tuesday’s meeting will be given to Gwendal and Will to discuss SWITCH and DTS”; chairs will “take the last 15 minutes for a series of Show of Hands to supplement [the SWITCH/DTS] consensus call”. (archive)
Consensus call on Object filters	opens 2026-05-12, closes 2026-05-26	Magnus Westerlund (MOQ chair) May 12 11:42 UTC (archive) — re: PR #1518 Object Filters as optional-with-max-count-signalling in MOQT. 4-message afrind↔Mo Zanaty thread May 22-23 clarified PR text already says property filters apply to PUBLISH + Objects; Mo proposes releasing the London Day-1 1015-1020 Track Property Filters slot.
Consensus Call: DTS and SWITCH	opens 2026-05-21, closes 2026-06-04	Martin Duke May 21 17:29 UTC (archive). 2 questions × 2 docs (PR #1378 SWITCH + wilaw/dts4moq): (1) WG adopt in some form? (2) If yes, integrate into MOQT or as extension? Deadline 1 week before London opens.
Consensus call on filters	opens 2026-05-22, closes 2026-06-05	Martin Duke May 22 12:22 UTC (archive) — “merge all the filters into the MOQT draft except for top N, where there were substantial concerns”. Layered with Magnus’s May 12 call: Magnus’s deals with adoption-at-all (Object Filters optional in MOQT), Martin’s deals with required-vs-extension. Cascading deadlines: May 26 (Object Filters close + DTS/SWITCH show-of-hands) → June 4 (DTS/SWITCH close) → June 5 (Filters close) → June 11-12 (London formal).
London interim (in-person, hackathon/interop)	2026-06-09 to 2026-06-10	Cloudflare London office (County Hall / The Riverside Building, Belvedere Road, SE1 7PB). Hackathon / interop days announced by mike-english on the IETF MoQ list May 15, 2026 (“[Moq] London interim June 9-12”). 09:00–17:00 BST (08:00–16:00 UTC).
interim-2026-moq-08	2026-06-11	London interim, formal session Day-1 (0900-1700 BST). Published agenda (revised June 5, “shifted more time to MOQT blockers”): Concurrent Subscribe (Ian, 0945, #1633) · Object Range Filters (Mo, 1030, PR #1518) · Joining FETCH (Alan+Mo, 1045-1145, PR #1642) · Request Blocking (Alan, 1230, #1519) · Other MOQT Issues (Alan+Ian, 1330-1430 + 1500-1600) · Next Interim Planning (Martin, 1430) · SWITCH/DTS Implementation Lessons (Ali, 1600-1700).
interim-2026-moq-10	2026-06-12 (morning)	London interim, formal session Day-2 morning. Published agenda: Interop Report (Mike, 0930) · DOS Design-team readout (Mike, draft-englishm-moq-relay-dos) · conditional SWITCH Issues (Gwendal) / DTS Issues (Will) — still flagged “dependent on the outcome of the SWITCH consensus call”.
interim-2026-moq-11	2026-06-12 (afternoon)	London interim, formal session Day-2 afternoon. Published agenda has two branches. Incorporated: Top-N DDOS (Cullen) + Top-N issues (Mo, PR #1518) + Top-N Implementation (Suhas) + MSF/CMSF (Will) + Privacy Pass (Suhas) + Secure Objects (Cullen) + LOC update (Mo). Not incorporated: CDN Provisioning (Mike) + MSFTS (Gwendal) + MSF/CMSF (Will) + Privacy Pass (Suhas) + Secure Objects (Cullen) + LOC update (Mo) + Parking Lot. LOCMAF + catalog-format not scheduled in either branch.
Virtual interim (post-London #1)	2026-06-22 16:30–18:00 UTC	Proposed by Martin Duke May 25 (archive). Feedback / objections deadline June 8 (day before London opens). First interim after the four May-26-to-June-5 consensus calls all close.
Virtual interim (post-London #2)	2026-07-06 16:30–18:00 UTC	Proposed by Martin Duke May 25, same feedback deadline. Pre-Vienna IETF slot.

London interim registration deadline: Thursday 2026-06-04 — attendees must add name + affiliation to the GitHub wiki by that date so mike-english can pass names to Cloudflare building security. See Mike English’s May 15 mailing-list message for the full announcement. Follow-up message with arrival procedures, sign-in instructions, reception timing, and remote-participant details still to come.

interim-2026-moq-14 Outcomes (held Apr 27 16:30 UTC)

The Apr 27 virtual interim ran the editor agenda. Decisions emerged on GitHub between Apr 27 18:36 UTC and Apr 28 03:43 UTC (mostly recorded by ian-swett as PR/issue comments):

1. Required Request ID — REMOVE from draft-18. ian-swett Apr 27 18:42 UTC on issue #1603: “Conclusion was to remove required-request-id from draft 18 and fix Joining Fetch (if necessary?). Those who believe some functionality in this space is useful, such as for make-before-break, should explore those use cases in more detail and further describe what, if any, dependency structure between requests is needed in MoQ. Tentative plan is to discuss these at the London hybrid interim in June.” The three-way fork (status quo / PR #1604 structural / PR #1613 flow control) collapsed to a fourth, simplest option: delete the field. PR #1615 (ian-swett, +3/−52) opened Apr 27 19:48 UTC implements this; victor-vasiliev APPROVED. Make-before-break work deferred to London June 11-12.
2. Subgroup ID = first Object ID (PR #1608) — needs more iteration. WG agreement on knowing start Object ID; differing concerns about restriction at Original Publisher; confusion about out-of-order subgroup objects.
3. PUBLISH_OK removal (PR #1611) — proceed with retarget. ian-swett APPROVED with body “Reminder to retarget this.”
4. REDIRECT (PR #1534) — APPROVED by victor-vasiliev Apr 27 23:01 UTC. Relay-behavior text the Cloudflare/Google alignment loop opened on hasn’t yet been pushed.
5. SUBSCRIBE_NAMESPACE split (PR #1542) — APPROVED, near merge. Approvals from Suhas, Vasilvv pre-interim; afrind addressed the seven inline comments at Apr 27 05:07–05:13 UTC.
6. 0-RTT / startup latency (PR #1544) — Martin Thomson joins review at Apr 28 01:46 UTC with substantive rewrite suggestion. Forward-secrecy text removed via Apr 28 01:28 UTC suggestion patch.
7. REWIND consensus call (Magnus Westerlund’s Apr 16 ballot, deadline May 1) — discussion thread re-erupted on the list with 9 messages Apr 27–28, two camps emerging: Luke + Ian favor CurrentGroupFill (the simplest band-aid sketched by Alan Apr 17); Martin defends best-effort REWIND with a compromise framing (best-effort floor, allow more aggressive). See discussions-2026-04.

Slack post by alan-frindell at meeting open: “Interim starting now. Small number of participants so far…“

interim-2026-moq-14 Agenda (Apr 27 16:30 UTC, posted Apr 22)

Posted to datatracker and announced on the MoQ mailing list by martin-duke on 2026-04-22 19:41 PDT. “It’s all editor time.” Working items:

1. PR #1542 / Issue #1458 — Split SUBSCRIBE_NAMESPACE and SUBSCRIBE_TRACKS with prefix-update capability (alan-frindell).
2. PR #1586 — Delta-encode Object ID and Group ID in FETCH responses (ian-swett).
3. Issue #1604 / Issue #1602 — Placement of Joining FETCH on the SUBSCRIBE stream (noted as having complications).
4. PR #1605 — Split DELIVERY_TIMEOUT into OBJECT_DELIVERY_TIMEOUT and SUBGROUP_DELIVERY_TIMEOUT (Victor Vasiliev); potentially resolves #1476.
5. PR #1603 / Issue #1519 — Required request ID for draft-17. Now a three-way fork after Apr 23–24 activity: (a) keep status quo; (b) PR #1604 moves Joining FETCH onto SUBSCRIBE stream so RRID stops multiplying; (c) PR #1613 (alan-frindell, Apr 23 23:10 UTC) keeps RRID but adds a MAX_REQUEST_UPDATES Setup Option for per-stream flow control on REQUEST_UPDATE. Martin Duke’s Apr 24 00:42 UTC comment on #1613 accepts the bound argument but flags missing enforcement text.
6. General discussion — Whether removing Message Parameters was a mistake.

Remote: https://meetings.conf.meetecho.com/interim/?session=35394 · Alan to post issue slides.

Apr 24 18:26 PDT (Apr 25 01:26 UTC) update: alan-frindell replied to Martin’s agenda thread on the mailing list with the slides folder link. Notable line: “Some content is still pending. Victor will provide updated slides on delivery timeout proposals and request ID alternatives.” — confirms Victor Vasiliev will present a competing proposal to RRID at the interim, complementing Martin’s PR #1604 and Alan’s PR #1613. Headline agenda items now have published slides for #1608 (Subgroup ID = first Object ID), 1603 (Required Request ID), #1613 (MAX_REQUEST_UPDATES), #1605 (delivery timeout split). Time permitting: Joining FETCH Dissent.

London Interim (June 9-12)

Final preliminary agenda (Martin Duke, May 21 18:08 UTC)

Mailing list archive. Chair Martin Duke published the final preliminary agenda May 21 18:08 UTC. Opener: “We have decided to prioritize core MOQT draft issues and did not have time to meet all the requests. The gaps in the schedule are discussion time for each issue. The agenda for Friday is dependent on the outcome of the SWITCH consensus call … which just started and concludes on 4 June.”

Day 1 (June 11 — MOQT core, NOT conditional):

Slot (UTC offset of BST)	Topic	Lead	Min	Reference
0930	Administrivia	—	15	—
0945–1000	Object Range Filters	Mo	15	PR #1518
1015–1020	Track Property Filters	Mo	5	PR #1518
1030–1045	Subscription Location Filters	Mo	15	PR #1401
1100–1130	Request Blocking	Alan	30	#1519
1200–1300	Lunch	—	—	—
1300–1310	Concurrent Subscribe	Alan	10	#1633
1330–1350	Joining FETCH	Alan	20	Joining Fetch Dissent label
1430–1445	Break	—	—	—
1445–1500	Next Interim Planning	Martin	15	—
1500–1700	Other MOQT Issues	Alan	120	All issues

Day 2 (June 12 — CONDITIONAL on SWITCH/DTS being incorporated):

Slot	Topic	Lead	Min
0930–0945	Interop Report	Mike	15
0945–1000	DOS Design team readout	Mike	15
1015–1045	SWITCH Issues	Gwendal	30
1115–1130	DTS Issues	Will	15
1200–1300	Lunch	—	—
1300–1310	Top-N DDOS	Cullen	10
1320–1335	Top-N issues	Mo	15
1405–1410	Top-N Implementation	Suhas	5
1415–1435	MSF/CMSF	Will	20
1505–1515	Privacy Pass	Suhas	10
1525–1535	Secure Objects	Cullen	10

Net request-vs-agenda compression:

Requester	Asked	Got	Compression
Mo Zanaty	135 min	50 min	−63%
Suhas	55 min	15 min	−73%
Cullen	50 min	20 min	−60%
Will Law	105 min	35 min	−67%
afrind	~240 min	180 min	−25%
Tim Evens (May 21 late)	15 min	0 min	−100% (DENIED)

Chair pattern: prioritised core-MOQT issues (afrind) at smallest compression (−25%) and structurally compressed implementation/external-format requests (Mo / Suhas / Cullen / Will) at −60% to −73%. The Day-2 agenda is conditional on June 4 SWITCH/DTS consensus call — if both DTS+SWITCH go to /dev/null, Day 2 collapses to ~3h of Top-N + MSF/CMSF + Privacy Pass + Secure Objects.

Agenda requests (deadline May 20 closed; extension implicitly declined)

As of 2026-05-21 06:00 UTC, 6 requesters have filed ~585 min total against the moq-chairs inbox (Cullen’s 2 rejected requests both re-filed compliantly):

Sender	Request	Present	Discuss	Total	Status
Suhas	Top-N Track Filter Impl Experiences + Privacy Pass Demo	15+10	20+10	55min	format-compliant (archive)
afrind	37 open non-editorial MOQT issues (Joining FETCH Dissent 60min, Filter consensus, ABR/SWITCH 60min placeholder, #1519 request blocking 60min, #1633 concurrent subs 30min, remaining 22 issues 1-2h distributed)	varies	varies	~240min (4h)	format-compliant; single largest ask (archive)
Will Law (revised)	MSF/CMSF tech decisions + DTS (“unless resolved May 26”)	20+15	40+30	105min	format-compliant (archive)
Mo Zanaty (May 21)	Filter cluster: Object Range Filters #1518 (30) + Track Property Filters #1518 (15) + Top-N #1518 (45) + Subscription Location Filters #1401 re-proposal (30) + LOC update (15)	varies	varies	135min	format-compliant; “likely change after May 26” (archive)
Cullen Fluffy Jennings (May 20 re-file)	London Agenda - track filter DDOS “DDOS problems with track filter with top N” — “major area of concerns”, offers to consolidate other presenters’ concerns into one deck	10	20	30min	NEW (archive)
Cullen Fluffy Jennings (May 20 re-file)	Secure Object updates + impl progress	10	10	20min	format-compliant re-file (archive)
Will Law (May 19 initial — superseded)	same as revised, no present/discuss split	—	—	—	REJECTED by Martin Duke (archive)
Cullen (May 19 initial — superseded)	Secure Object updates, no present/discuss split	—	—	—	REJECTED by Martin Duke (archive)
Mo Zanaty (May 19)	Deadline extension request May 20 → May 26	—	—	—	Implicitly declined May 20 by Martin Duke: “I would suggest proactively submitting requests… you can cancel later if needed” (archive)

Net: ~585 min ≈ 9h45m of formally-requested time against ~8 hours of formal-session capacity across June 11-12 (interim-2026-moq-08/09/10/11). ~22% oversubscribed at the deadline; afrind’s MOQT issue block alone is ~4h, and the Mo Zanaty + Cullen filter-design cluster adds another 230min directly addressing PR #1518 / PR #1401 / #1633. The chairs will need to compress per-issue time, defer items to follow-up interims (May 26 virtual is the obvious candidate), or rule a chunk out-of-scope.

Format-strict precedent: Martin Duke rejected 2 of the first 4 requests (Cullen, Will Law’s initial) for not separating presentation vs discussion time. Both resubmitted compliantly within hours. The May 20 deadline-extension question (Mo Zanaty May 19) was resolved May 20 via Martin Duke’s “submit-and-cancel-later” pragmatic compromise — the May 20 deadline stays in force as policy, with the chairs accommodating uncertainty by allowing post-deadline cancellation rather than post-deadline filing. Net regulatory outcome: format strictness is now the precedent (rejections), but deadline strictness is the spirit not the letter (cancel-later allowed).

Filter-design cluster is the structurally top item by allocated time (Mo Zanaty 135min + Cullen 30min + afrind ~60min in #1633 + Suhas 35min Top-N = ~260 min of London agenda time dedicated to PR #1518 / PR #1401 / #1633 consensus). This eclipses the Joining FETCH Dissent block (~60 min) as the WG’s biggest single design battle going into London.

Formal invitation by mike-english on the IETF MoQ list May 15, 2026 (archive link). In-person hybrid interim at County Hall / The Riverside Building, Belvedere Road, London SE1 7PB (Cloudflare London office). Mike English’s announcement reframes the meeting into a 4-day contiguous in-person window rather than the previously-tracked “moq-08/09/10/11 across June 11–12” split.

Schedule (per Mike’s May 15 announcement):

• June 9 (Tue) — hackathon / interop day, 09:00–17:00 BST (08:00–16:00 UTC)
• June 10 (Wed) — hackathon / interop day, 09:00–17:00 BST (08:00–16:00 UTC)
• June 11 (Thu) — formal session day 1 (moq-08, 2 sessions)
• June 12 (Fri) — formal session day 2 (moq-09, moq-10, moq-11; moq-10 at 08:30 UTC, moq-11 at 12:30 UTC)

Logistics:

• Registration deadline: Thursday June 4 — names + affiliations on the GitHub wiki for building security.
• Daily timing: 09:00–17:00 BST (08:00–16:00 UTC) with a midday break.
• Follow-up announcement still pending with arrival procedures, sign-in instructions, reception timing, and remote-participant details (Meetecho).
• Format similar to the Boulder interim in February.

Note: moq-08 through moq-11 are numbered lower but scheduled later because they were registered on the datatracker before the virtual interims.

Past 2026 Meetings

Meeting	Date	Notes
interim-2026-moq-14	2026-04-27 16:30 UTC	All-editor virtual interim. Key decision: REMOVE Required Request ID from draft-18 (PR #1615 by ian-swett, approved by victor-vasiliev). Make-before-break work deferred to London June interim. Subgroup ID alignment (#1608) needs more iteration. PUBLISH_OK removal (#1611) proceeds. REDIRECT (#1534) approved by Vasilvv. 0-RTT (#1544) drew Martin Thomson into review. See above for full outcomes.
interim-2026-moq-13	2026-04-13	REWIND presentation by martin-duke. Key decision: REWIND will NOT go into core v1; editors land minimal band-aids (FETCH timeouts, subgroup filters). Formal consensus call to follow on 3 options (do nothing / extension / PR). Minutes posted Apr 16. Debate on relay vs. client complexity (Cullen Jennings vs. Will Law); Luke Curley + Victor Vasiliev flagged relay complexity risk.
interim-2026-moq-12	2026-03-30	Post-IETF 125. Minutes posted by Magnus Westerlund (Apr 9). Included SUBSCRIBE_NAMESPACE split discussion.
IETF 125 Shenzhen	2026-03-14	2 WG sessions
interim-2026-moq-07	2026-02-23
interim-2026-moq-05/06	2026-02-10	Boulder interim (2 sessions)
interim-2026-moq-03/04	2026-02-09	Boulder interim (2 sessions)
interim-2026-moq-02	2026-01-26
interim-2026-moq-01	2026-01-12

Where to Find Notes

• AI-generated minutes: https://ietfminutes.org/minutes/wg/moq.html (all 2026 meetings through Mar 30)
• Official notes: Linked from each meeting page on datatracker, e.g., https://datatracker.ietf.org/meeting/interim-2026-moq-13/session/moq
• Chat logs: Zulip at https://zulip.ietf.org/#narrow/channel/304-moq/
• Video recordings: Via Meetecho player, linked from meeting pages
• Meeting materials/slides: Linked from datatracker meeting pages

Datatracker Links

• All MOQ meetings: https://datatracker.ietf.org/group/moq/meetings/
• Specific meeting: https://datatracker.ietf.org/meeting/interim-2026-moq-NN/session/moq

Related

• discussions-2026-04 - April discussions
• discussions-2026-03 - March discussions (IETF 125)
• discussions-2026-02 - February discussions (Boulder)
• discussions-2026-01 - January discussions