Spreadtrum · 10.5.3.3
Other aspects ·
RAN1#124bis · Source verification
the AI's delta
refined
vs RAN1#124
Spreadtrum expanded the PT-RS insufficiency argument to include SRS alongside CSI-RS and DMRS, now attributing insufficiency to distinct design principles rather than the prior specific reasons (CSI-RS independent from PDSCH, DMRS lacks time domain density). The NR PT-RS reuse position was refined with a new historical stability argument citing Rel-15 through Rel-20 as evidence of maturity, and the enhancement discussion was scoped to during the study phase.' The TRS unified measurement framework proposal was refined with an additional specification: configurable RE density in time and frequency domains. The prerequisite for studying NR tracking requirement sufficiency hardened from proposes studying whether NR requirements are sufficient before discussing enhancements to requires studying... establishing this assessment as a prerequisite for determining the 6GR path forward,' elevating it from a study suggestion to a gating condition.
AI-synthesized from contributions · all text is paraphrased
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Contributions at RAN1#124bis · 1 doc
Discussion on other aspects of CSI acquisition and report for 6GR
Position extracted by AI
Spreadtrum proposes introducing a dedicated PT-RS design specifically tailored for phase noise estimation, arguing that existing 6GR reference signals (CSI-RS, DMRS, SRS) are insufficient due to their distinct design principles. They propose reusing the 5G NR PT-RS sequence and RE pattern as a mature baseline, noting its stability from Rel-15 through Rel-20, while remaining open to discussing enhancements during the study phase. For TRS design, they propose reusing the CSI-RS design with dedicated configuration for fine time/frequency tracking, enabling a unified framework for channel measurements with configurable RE density in time and frequency domains. They require studying whether NR requirements for time/frequency tracking are sufficient before evaluating potential TRS enhancements, establishing this assessment as a prerequisite for determining the 6GR path forward.
Summary
This document from Spreadtrum/UNISOC discusses design aspects for PT-RS and TRS in 6GR, making 4 proposals. The company advocates for a dedicated PT-RS design based on the mature 5G NR framework and proposes reusing CSI-RS with dedicated configuration for TRS, while recommending a study to assess whether existing NR time/frequency tracking requirements are sufficient for 6GR.
Prior contributions at RAN1#124 · 1 doc · Feb 09, 2026
Discussion on other aspects of CSI acquisition and report for 6GR
Position extracted by AI
Spreadtrum proposes a dedicated PT-RS design for 6GR phase noise estimation, arguing that existing reference signals like CSI-RS and DMRS are insufficient—CSI-RS is independent from PDSCH and DMRS lacks sufficient time domain density. They consider NR PT-RS design mature and propose reusing it as a baseline for 6GR, remaining open to discussing enhancements. For TRS, they propose reusing CSI-RS design with dedicated configuration to construct RE patterns for fine time/frequency tracking, noting benefits for a unified channel measurement framework. They additionally propose studying whether NR time/frequency tracking requirements are sufficient before discussing any enhancements beyond NR TRS design.
Summary
This document from Spreadtrum/UNISOC discusses design aspects for 6G Radio (6GR) Phase Tracking Reference Signal (PT-RS) and Tracking Reference Signal (TRS). It contains 4 proposals total, recommending a dedicated PT-RS design reusing 5G NR as a baseline and advocating for the reuse of CSI-RS design with dedicated configuration for TRS, along with studying whether NR tracking requirements suffice for 6GR.
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 Spreadtrum's consolidated stance at RAN1#124bis
against their stance at RAN1#124 and classified the change as
refined.
Always verify critical claims against the original Tdocs linked above.