FUTUREWEI · 10.5.1.1
Synchronization acquisition and beam measurement ·
RAN1#124bis · Source verification
the AI's delta
strengthened
vs RAN1#124
Hardened SSB bandwidth position from general removing backward compatibility constraints to explicit rejection of the ≤3MHz option, citing PBCH detection and coverage degradation. Refined light sync signal structure by specifying PSS as minimum component with SSS now optional (at least PSS and optionally SSS) where prior position did not specify optionality. Narrowed UL-WUS design by adding numerical specificity: limited to a small number of OFDM sequences and listening occasions enabling low-power BS receiver operation. Shifted DL WUS deployment stance from requires adoption from day one coupled with coverage arguments to requires adoption from day one as baseline UE energy saving mechanisms with additional capability of supporting dynamic POs.
AI-synthesized from contributions · all text is paraphrased
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Contributions at RAN1#124bis · 1 doc
6G Synchronization Acquisition and Beam Measurement
Position extracted by AI
Futurewei proposes supporting basic 6GR SSB design with bandwidth larger than 3MHz at 15KHz SCS, rejecting the ≤3MHz option as degrading PBCH detection performance and coverage compared to 5G NR's 3.6MHz SSB bandwidth. They propose defining a light sync signal structure consisting of at least PSS with lightweight sequence indication and optionally SSS to compensate for longer default SSB periodicity while maintaining cell search complexity. They propose on-demand Sync signal/SIB1 request in standalone cells using sequence-based indication of UL-WUS configuration, beam/Sync Signal index, and/or LSBs of SFN, with UL WUS design limited to a small number of OFDM sequences and listening occasions to enable low-power BS receiver operation. They propose clustered provisioning of cell-common signaling with frequency domain multiplexing of paging frames for aligned cell DTX/DRX and UE DRX, combined with DL-WUS grouping/subgrouping indication. They propose adoption from day one of DL WUS of OFDM-based sequence replacing Rel-17 PEI functionality and supporting dynamic POs as baseline UE energy saving mechanisms, citing achievable coverage comparable to 6G PDCCH when considering standalone DL WUS not reliant on OOK waveform.
Summary
This document presents 7 proposals and 15 observations covering synchronization/system information and paging transmission/monitoring for 6G Radio. It advocates for longer default SSB/SIB1 periodicity combined with light sync signals and on-demand mechanisms for network energy saving, along with paging frame clustering/grouping aligned with cell DTX/DRX and adoption of DL WUS of OFDM-based sequence as baseline UE energy saving mechanisms.
Prior contributions at RAN1#124 · 1 doc · Feb 09, 2026
6G Synchronization Acquisition and Beam Measurement
Position extracted by AI
Futurewei proposes extending 5G NR network energy saving techniques for 6G by removing backward compatibility constraints, specifically replacing frequent SSB/SIB1 transmissions with infrequent periodic transmissions up to 160ms for any SSB type (CD-SSB and NCD-SSB). They propose a light Sync Signal structure with sequence-based design for indicating UL WUS configuration, beam/Sync Signal index, and LSBs of SFN, arguing this enables on-demand request of MIB/SIB1 in standalone cells and allows the BS to use a low-power transmitter. For paging, they propose clustering/grouping of legacy Paging Frames in time domain via frequency domain multiplexing to align cell DTX/DRX with UE DRX. They require adoption from day one of duty-cycled operations and DL WUS of OFDM-based sequence with at least Rel-17 PEI functionality replacement, citing that DL WUS coverage comparable to a 6GR control channel is achievable when using the standard 6GR UE Noise Figure rather than relying on OOK waveform limitations.
Summary
This 3GPP RAN1 contribution from Futurewei for 6G Radio proposes energy-efficient designs for synchronization, system information, and paging. It presents 5 proposals and 15 observations focusing on longer periodicities for SSB/SIB1, on-demand sync signal/SIB1 mechanisms for standalone cells, clustered paging frame provisioning, and adoption of OFDM-based DL WUS as a baseline UE energy saving mechanism.
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 FUTUREWEI'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.