NR RSTD Measurement Reporting With Adaptive Resolution Factors
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Solution Overview
Problem
The measurement report mapping for timing measurements in NR is not yet decided, and incorporating a configurable measurement report mapping step is not straightforward, leading to inefficiencies and inconsistencies with high-resolution mapping in LTE.
Innovation Solution
A measuring node determines a set of applicable resolution factor values based on functions dependent on measured quantities, frequency range, and other factors, and adapts the resolution factor to obtain a suitable value for measurement report mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a configurable measurement report mapping step is incorporated into NR, then measurement reporting flexibility is improved, but system complexity and implementation difficulty increase
Solution Approach 1:
The patent implements dynamic resolution factor adjustment where the resolution factor k can be configured differently for different measurement types (RSTD, UE Rx-Tx time difference, gNB Rx-Tx time difference) and different frequency ranges. This allows the system to adapt the measurement report mapping granularity dynamically based on specific positioning requirements while managing complexity through structured configuration parameters.
Solution Approach 2:
The patent changes the resolution parameter from fixed to configurable by introducing a resolution factor k that can take values from 0 to 5, where each value corresponds to a different reporting granularity (2^k * Tc). This parameter change enables flexible measurement reporting where higher precision can be achieved when needed while reducing overhead in other scenarios.
2Measurement precision
If the smallest configurable step (1 Tc) is used for measurement reporting, then measurement precision is improved, but the number of reportable values increases significantly requiring more bits for encoding
Solution Approach 1:
The patent introduces a resolution factor k that scales the reporting step size from the minimum 1 Tc to 2^k * Tc. This allows the system to use coarser resolution (larger k values) when high precision is not required, thereby reducing the number of reportable values and the encoding bits needed, while still preserving the option to use fine resolution (smaller k values) when high precision is needed for positioning accuracy.
3Measurement precision
If high-resolution mapping is implemented in LTE, then measurement accuracy is improved, but compatibility and ease of operation decrease when integrating with NR
Solution Approach 1:
The patent creates a universal measurement report mapping framework that works across both LTE and NR systems. By defining a resolution factor k that can be configured for different measurement types and frequency ranges, the system maintains compatibility with LTE's high-resolution requirements while enabling NR's flexible positioning capabilities. The same reporting mechanism can serve both legacy LTE positioning needs and advanced NR positioning scenarios.
Data Source
AI summary
According to certain embodiments, a method for use in a first node comprises receiving a first resolution factor (k) from a second node, adapting the first resolution factor (k) to obtain a second resolution factor (k′), and reporting a measurement to the second node according to the second resolution factor (k′).