TCL · 9.1.2
Specification support for positioning accuracy enhancement ·
RAN1#120 · Source verification
the AI's delta
new
vs RAN1#119
TCL is a new contributor in the current meeting. They preferred Option A-2 for label-based model performance monitoring in Case 1 to minimize overhead. They added a proposal that monitoring outcomes be signaled only upon performance deterioration and recommended that label-free monitoring metrics be calculated at the model inference entity. Additionally, they proposed introducing AI-specific reference signal configurations for PRS and SRS to ensure consistency between training and inference.
AI-synthesized from contributions · all text is paraphrased
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Contributions at RAN1#120 · 1 doc
Discussion on AIML positioning
Position extracted by AI
TCL prefers Option A-2 for label-based model performance monitoring in Case 1 to minimize overhead, arguing that the target UE can autonomously derive ground truth labels from position calculation assistance data. They propose that monitoring outcomes be signaled only upon performance deterioration and recommend that label-free monitoring metrics be calculated at the model inference entity. For training data collection in Case 3b, TCL proposes down-selecting between UE-side validation via implementation or LMF-side validation using immobility duration information. To ensure consistency between training and inference, TCL proposes introducing AI-specific reference signal configurations for PRS and SRS, allowing the UE to distinguish between AI-based and non-AI-based measurements. Regarding sensitive location data (info #7), TCL prefers Alternative 1, where geographical coordinates are provided implicitly via an associated ID, and proposes down-selecting whether this ID maps to a set of TRP coordinates or a single TRP coordinate.
Summary
TCL presents 11 proposals and 2 observations regarding specification support for AI/ML-based positioning in NR, focusing on performance monitoring, training data collection, and consistency between training and inference. The document argues for reducing signaling overhead in label-based monitoring by preferring Option A-2 and performing label-free monitoring at the inference entity, while proposing AI-specific reference signal configurations to ensure model consistency.
Prior contributions at RAN1#119 · 1 doc · Nov 18, 2024
Discussion on specification support for positioning accuracy enhancement
Position extracted by AI
TCL advocates FOR Option A-2 for label-based model monitoring to reduce data transfer overhead, supports AI-specific reference signal configurations with hierarchical resource type structures, and promotes explicit indication of critical assistance data IEs for consistency. They push FOR UE-side validation in training data association and configurable offset approaches for sample timing determination, while arguing AGAINST high-overhead options that require multiple measurement data transfers.
Summary
TCL presents their position on AI/ML based positioning for NR air interface, covering performance monitoring, training data collection, and consistency between training and inference. The document contains 11 proposals and 2 observations addressing various aspects of AI/ML positioning implementation.
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 TCL's consolidated stance at RAN1#120
against their stance at RAN1#119 and classified the change as
new.
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