Timing Group Indication for Positioning Measurement Accuracy
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Solution Overview
Problem
Current wireless communication systems, particularly in the transition to 5G, face challenges in accurately determining timing information for positioning measurements, leading to inefficiencies in spectral efficiency, signaling, and latency, especially in managing multiple reference signals and measurements across different timing groups.
Innovation Solution
A method is introduced to determine and transmit timing information associated with reference signals for positioning, allowing for the identification of specific timing groups, which enables more precise measurement reporting and synchronization, even across different hardware components and frequency layers, by using quasi-colocation relationships and spatial relations between reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timing information is determined for multiple reference signals across different timing groups, then positioning measurement accuracy is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments reference signals into multiple timing groups based on their timing relationships. Each timing group is identified by a unique timing group ID, allowing the system to manage timing information for multiple reference signals in an organized manner. This segmentation enables accurate positioning measurements by properly associating measurements with their respective timing groups while avoiding the complexity of managing all signals as a single group.
Solution Approach 2:
The patent performs preliminary classification of reference signals into timing groups before positioning measurements are taken. By pre-identifying timing group associations and storing timing group IDs, the system prepares the timing structure in advance, which simplifies the measurement process and reduces real-time computational complexity while maintaining measurement accuracy.
2Measurement precision
If timing calibration error is compensated for multiple reference signals, then positioning accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges timing calibration information by associating multiple reference signals with the same timing group ID when they share common timing characteristics. This consolidation allows the system to apply timing calibration corrections to groups of signals simultaneously, improving positioning accuracy while reducing the amount of signaling overhead compared to managing each signal's timing calibration independently.
3Measurement precision
If hardware group delay is determined for each reference signal, then measurement precision is improved, but latency increases
Solution Approach 1:
The patent segments reference signals into timing groups based on shared hardware characteristics. By determining hardware group delay at the timing group level rather than for each individual reference signal, the system maintains measurement precision for signals within the same timing group while significantly reducing the latency associated with repeated hardware delay determinations.
Data Source
AI summary
In an aspect, a wireless node (e.g., UE or BS) determines timing information associated with a first one or more reference signals for positioning or with a first one or more measurements derived using the first one or more reference signals for positioning, the first timing information including a transmit or receive hardware group delay, timing error, timing calibration error, or a combination thereof. The wireless node further determines that the first one or more reference signals or the first one or more measurements are associated with one of a plurality of timing groups at least based on the first timing information. The wireless node transmits (e.g., to a position estimation entity) an indication of the associated timing group in association with the first one or more reference signals for positioning or with the first one or more measurements derived using the first one or more reference signals for positioning.