Downlink Positioning Reference Signal Priority Processing
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Solution Overview
Problem
Current wireless communication systems face performance impairment due to the lack of defined priority in processing downlink positioning reference signal (PRS) resources outside a time difference, which affects both downlink channel reception and uplink channel transmission.
Innovation Solution
A method and system that determine a terminal device's capability to process DL PRS resources outside a time difference by receiving assistance data including expected reference signal time difference (RSTD) and uncertainty, and comparing physical cell identifiers to determine if the PRS resource can be measured outside a measurement gap, thereby establishing priority for processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If DL PRS resources are processed outside a time difference, then positioning measurement speed is improved, but system performance deteriorates due to interference with DL channel reception and UL channel transmission
Solution Approach 1:
The patent changes the parameter of processing timing for DL PRS resources by determining capability based on RSTD values and uncertainty thresholds. The network device receives capability indication from the terminal device, which is derived from comparing expected RSTD + uncertainty against a threshold, thereby adapting processing parameters to specific positioning scenarios.
Solution Approach 2:
The patent introduces dynamic capability indication where the terminal device's ability to process DL PRS outside time difference is not fixed but determined based on specific conditions (RSTD values, uncertainty levels). This dynamic approach allows the system to adapt processing mode based on real-time positioning requirements and terminal capabilities.
2Measurement precision
If DL PRS resources are processed outside a time difference, then positioning accuracy is improved, but interference with other channels increases
Solution Approach 1:
The patent uses parameter comparison (RSTD ± uncertainty vs. threshold) to determine processing capability, allowing the system to achieve positioning accuracy by processing outside time difference only when parameters indicate it is safe to do so, thereby controlling interference levels.
3Productivity
If priority processing rules for DL PRS resources are defined, then processing efficiency is improved, but system complexity increases
Solution Approach 1:
The patent defines priority processing through parameter comparison (RSTD and uncertainty thresholds) rather than complex rules. The terminal device determines capability by comparing calculated values against a threshold, providing a simple yet effective priority mechanism that improves efficiency without significantly increasing complexity.
Data Source
AI summary
Methods and systems for reporting an indicator for a positioning measurement result are provided. In some embodiments, the method includes that: (1) a terminal device receives, from a network device, a downlink (DL) positioning reference signal (PRS) resource; (2) the terminal device receives assistance data, wherein the assistance data includes expected reference signal time difference (RSTD) and expected RSTD uncertainty; and (3) the terminal device determines whether a first physical cell identifier of a reference Transmission/Reception Point (TRP) is the same as a second physical cell identifier of the network device.