SageRAN · 10.7.1
NTN specific requirements and design for GNSS based operation ·
RAN1#124bis · Source verification
the AI's delta
new
vs RAN1#124
SageRAN appears as a new contributor with no prior meeting position. They propose studying negative TA command values in RAR for over-pre-compensated UE, a new closed-loop frequency adjustment command analogous to TA control, and a new measurement configuration including beam azimuth, elevation, and beamwidth properties to address high-altitude scenarios not served by existing location format lacking altitude. On scheduling offsets, they explicitly support Option 2 (RTT incorporated into K1/K2) and propose extending the dl-DataToUL-ACK range. They are the only company in the current meeting explicitly proposing to study an efficient TDD frame structure for NTN, placing them in contrast with Nokia and Spreadtrum's FDD-only positions.
AI-synthesized from contributions · all text is paraphrased
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Contributions at RAN1#124bis · 1 doc
Discussion on NTN specific issues for 6GR
Position extracted by AI
SageRAN proposes studying the possibility of negative TA command values in RAR for NTN random access when UE pre-compensation exceeds RTD, while leaving PRACH detection for over pre-compensation advance to gNB implementation and suggesting consideration of PRACH format with multi sequences. They suggest introducing a new frequency adjustment command to support closed-loop frequency control for NTN, analogous to timing advance control. They suggest introducing a new measurement configuration including beam properties (azimuth, elevation, beamwidth) because the existing location format without altitude information cannot meet high-altitude scenario requirements. They suggest Option 2 for scheduling offset in 6GR, where large scheduling delays to accommodate RTT are incorporated into scheduling offsets like K1/K2 in NR, and propose studying extension of dl-DataToUL-ACK to accommodate greater delay range. They also propose studying an efficient frame structure for TDD in NTN.
Summary
This document from SageRAN discusses NTN-specific issues for 6G Radio, presenting 2 Observations and 7 Proposals across five areas: initial TA command enhancement, frequency adjustment command, mobility measurement based on beam coverage, scheduling offset, and TDD frame structure.
Prior contributions
SageRAN has no prior contributions to 10.7.1 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 SageRAN's consolidated stance at RAN1#124bis
against their stance at RAN1#124 and classified the change as
new.
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