Nokia · 10.5.1.3
Bandwidth operation ·
RAN1#124bis · Source verification
the AI's delta
strengthened
vs RAN1#124
Nokia hardened their lean BWP configuration framework: the earlier general proposal to reduce BWP types becomes a specific limit of two non-initial BWPs per link direction (wideband and narrowband). The earlier requirement to remove TDD coupling between DL and UL BWPs is refined with a concrete implementation assumption: separate UE local oscillators for Rx and Tx. The BWP switching framework is significantly refined: the gap minimization proposal now splits total switching delay into processing time and switching time components, and introduces a new Type 0 (baseband-only) versus Type 1 (RF retuning) classification where gap presence is conditional on link direction and switch type. The earlier proposals to decouple initial BWP bandwidth from CORESET0 bandwidth and to simplify carrier configuration via a single absolute frequency parameter replacing pointA and SCS-specific offset are dropped. The opposition to timer-based BW adaptation is preserved and explicitly restated. The implicit acknowledgement mechanism via PUSCH is preserved.
AI-synthesized from contributions · all text is paraphrased
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Contributions at RAN1#124bis · 1 doc
On aspects of bandwidth operation in 6GR
Position extracted by AI
Nokia presents a technical case that NR BWP operation suffers from unnecessary flexibility resulting in excessive complexity, non-robust switching, suboptimal UL coverage, and problematic TDD coupling between UL and DL BWPs sharing the same center frequency. They propose a lean 6GR BWP configuration reducing BWP-specific parameters in favor of cell-specific parameters, limiting to two non-initial BWPs per link direction (wideband and narrowband), and decoupling DL and UL BWP center frequencies in TDD assuming separate UE local oscillators for Rx and Tx. They require a proactive DCI-based BWP switching framework with implicit acknowledgement via PUSCH (the best signal for UL DTX detector performance), explicitly opposing timer-based BW adaptation. They propose minimizing the switching gap by splitting total switching delay into processing time and switching time components, and making gap presence conditional on link direction and whether the switch is baseband-only (Type 0) or involves RF retuning (Type 1).
Summary
This Nokia Tdoc analyzes 5G NR BWP shortcomings and proposes a simplified, robust bandwidth adaptation framework for 6G Radio (FS_6G_Radio), containing 14 numbered proposals and 9 observations across initial BWP, non-initial BWP, BWP switching, and network carrier configuration.
Prior contributions at RAN1#124 · 1 doc · Feb 09, 2026
On aspects of bandwidth operation in 6GR
Position extracted by AI
Nokia proposes a lean 6GR BWP configuration framework that reduces the number of BWP types and eliminates redundant functionality options, making as many parameters cell-specific rather than BWP-specific. They require removing the existing 5G TDD coupling between DL and UL BWPs, enabling independent center frequencies and independent switching per link direction. For switching robustness, they oppose timer-based BW adaptation and propose a proactive DCI-based scheme using UL grant as trigger, where PUSCH acts as implicit ACK to confirm receipt of BW switch commands before the actual switch occurs. They propose decoupling initial BWP bandwidth from CORESET0 bandwidth to enable wider broadcast PDSCH transmissions for network energy saving. They propose studying carrier configuration simplification by replacing pointA and SCS-specific offset with a single absolute frequency parameter for the start of the network carrier, assuming single SCS per band.
Summary
This 3GPP contribution from Nokia discusses bandwidth operation in 6GR, presenting 13 proposals and 7 observations aimed at redesigning the BWP framework to address 5G NR shortcomings. Key themes include simplification, robustness, decoupling UL/DL in TDD, and enabling wider initial BWP for network energy saving.
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 Nokia's consolidated stance at RAN1#124bis
against their stance at RAN1#124 and classified the change as
strengthened.
Always verify critical claims against the original Tdocs linked above.