3GPP Scout / Updates / Contested proposal

Contested proposalRAN1 #126-bis

RAN1 #126-bis agrees to study three two-stage DCI timing options

Published 2026-11-11Updated 2026-11-113GPP TSG RAN WG1 #126-bis

At a glance

At RAN1 #126-bis, chair notes record an agreement to study three candidate timing options for two-stage downlink control information (DCI).

Who proposed what

RAN1, the radio layer 1 working group, recorded T1 for the same slot and T2 for different slots. Under T3, the stages "can be in different slots". Our reading: T3 also permits the same slot, while T2 specifies different slots. In two-stage DCI, information is divided between a first stage and a second stage.

Source: R1-2607288, Ad-Hoc Chair (NTT DOCOMO, INC.), 3GPP TSG RAN WG1 #126-bis, chair notes, agenda item 10.5.4.1.

ASUSTeK proposed studying a wake-up signal followed by information, or splitting information between the two stages. Quectel favored Option 2-2, with a dedicated time/frequency resource for the second stage indicated by the first. That stage would differ in transmission scheme, physical resource structure, or both. Quectel also supported Option B, where the first stage carries information needed to decode the second.

NTT DOCOMO proposed studying two-stage DCI for large payloads, including multi-carrier or multiple transmission point scheduling. It also proposed considering "DCI with and without scheduling", including group-common DCI without scheduling. Our reading: HONOR's four-option discussion is separate from the T1 to T3 timing choices in the chair notes. HONOR recommended deprioritizing Option 4 and studying enhancements to the other three to address each option's drawbacks. None of the four company contributions was treated at RAN1 #126-bis, and their registers record no decision.

Source: R1-2608357, NTT DOCOMO, 3GPP TSG RAN WG1 #126-bis. © NTT DOCOMO.

Sources

  1. R1-2607288, Ad-Hoc Chair (NTT DOCOMO, INC.), 3GPP TSG RAN WG1 #126-bis, chair notes, agenda item 10.5.4.1.
  2. R1-2608482, ASUSTeK, 3GPP TSG RAN WG1 #126-bis. © ASUSTeK.
  3. R1-2607782, Quectel, 3GPP TSG RAN WG1 #126-bis. © Quectel.
  4. R1-2608357, NTT DOCOMO, 3GPP TSG RAN WG1 #126-bis. © NTT DOCOMO.
  5. R1-2607701, HONOR, 3GPP TSG RAN WG1 #126-bis. © HONOR.

How this page was made

Written with AI assistance from TDocs indexed by 3GPP Scout. An AI model (GPT-6 Sol) drafted each sentence and named the source it rests on. Code checked every quote word for word against the stored source text, and the live check fetched each TDoc again before publishing. A second AI model from another company (Claude Opus 5.5) reviewed the page against the same sources. The 3GPP documents themselves govern.