Kyocera Corporation · 10.5.4.1
Downlink control channel, scheduling for downlink and uplink transmission ·
RAN1#124bis · Source verification
the AI's delta
new
vs RAN1#124
Kyocera Corporation is a new contributor at this meeting. Their position introduces a single-stage DCI baseline with a technical case against two-stage DCI citing multi-step dependencies, timing constraints, and additional failure modes. They propose a fixed-size unified DCI format with a specific 40-bit example, separating baseline fields from feature-dependent information carried via PDSCH-embedded signaling for DL and RRC-configured profile-based completion for UL. Additional new concepts include hash-conditioned early termination using a Target Identification Field (TIF) mapped to early polar bit positions, SearchSpaceSet/aggregation level/candidate count restrictions as intentional blind decoding complexity levers, and cross-carrier scheduling via SearchSpace-bound carrier context or compact Carrier-Group ID (1-2 bits) without increasing DCI size hypotheses.
AI-synthesized from contributions · all text is paraphrased
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Contributions at RAN1#124bis · 1 doc
Considerations for the downlink control channel, scheduling for downlink and uplink transmissions
Position extracted by AI
Kyocera proposes a single-stage DCI baseline for 6G, explicitly arguing that two-stage DCI introduces multi-step dependencies, timing constraints, and additional failure modes which increase latency and implementation complexity. They propose a fixed-size unified DCI structure (40-bit example) for both DL and UL scheduling that separates baseline DCI fields on PDCCH from feature-dependent information, moving the latter to PDSCH-embedded signaling for DL and RRC-configured profile-based completion for UL. They propose hash-conditioned early termination using a Target Identification Field (TIF) mapped to early polar bit positions, allowing non-target UEs to abort decoding after partial polar processing. They propose restricting SearchSpaceSets, aggregation levels, and candidate counts as intentional configuration levers to bound blind decoding complexity, and they propose handling cross-carrier scheduling either via SearchSpace-bound carrier context or a compact Carrier-Group ID (1–2 bits) without increasing DCI size hypotheses.
Summary
Kyocera presents 5 Observations and 4 Proposals arguing for a single-stage DCI design with a fixed-size unified format for 6G, moving feature-dependent fields from PDCCH to PDSCH or RRC to limit blind decoding hypotheses and candidates, thereby reducing UE energy consumption without a two-stage DCI architecture.
Prior contributions
Kyocera Corporation has no prior contributions to 10.5.4.1 in the meetings currently tracked. This is either a new contributor to this sub-topic or the earliest meeting in our history.
How this was derived
The AI extracted the "position extracted" field above directly from each Tdoc during summarization.
For the delta summary at the top, the AI compared Kyocera Corporation's consolidated stance at RAN1#124bis
against their stance at RAN1#124 and classified the change as
new.
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