Multipath Phase Reporting for Precise 5G NR Positioning
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G New Radio (NR), face challenges in accurately determining the position of devices due to the complexity of multipath phase measurements, which are crucial for precise positioning and sensing.
Innovation Solution
Implementing methods for wireless positioning and sensing that involve determining and performing multipath phase measurements by a requesting entity (RE) and a measuring entity (ME), including the exchange of requests and responses for measurement results, using transceivers and processors to enhance multipath component reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multipath phase measurements are performed to improve positioning accuracy, then positioning precision is improved, but measurement complexity increases
Solution Approach 1:
The patent segments the multipath component reporting into different types of components (first multipath components and second multipath components) with different reporting requirements. First multipath components are reported when their RSTD exceeds a first threshold, while second multipath components are reported when their RSTD exceeds a second threshold. This segmentation allows the system to maintain positioning accuracy by reporting all relevant multipath components while reducing complexity by selectively reporting based on threshold criteria.
Solution Approach 2:
The patent changes the parameter used for filtering multipath components from a single RSTD threshold to a dual-threshold system based on component type. By introducing different threshold values for different multipath component types, the system can adaptively control the amount of reporting data, thereby managing measurement complexity while preserving positioning precision for components that exceed the respective thresholds.
2Measurement precision
If multiple multipath components are reported to improve positioning accuracy, then positioning precision is improved, but data processing complexity increases
Solution Approach 1:
The patent segments multipath components into first and second categories based on their RSTD characteristics. First multipath components with RSTD greater than a first threshold are processed separately from second multipath components with RSTD greater than a second threshold. This segmentation enables the receiving entity to process different types of multipath components with appropriate methods, reducing overall data processing complexity while maintaining positioning precision through targeted processing of relevant components.
Solution Approach 2:
The patent implements a feedback mechanism where the measuring entity reports multipath component characteristics (including RSTD values) to the requesting entity, which then uses this feedback information to determine which components warrant detailed processing. The requesting entity feeds back the threshold criteria and processing requirements, allowing the measuring entity to optimize its measurements and reporting, thereby reducing data processing complexity while preserving positioning precision.
3Measurement precision
If multipath phase measurements are performed with higher frequency bands, then positioning accuracy is improved, but signal attenuation increases
Solution Approach 1:
The patent converts the harmful effect of signal attenuation at higher frequency bands into a beneficial filtering mechanism. By measuring and reporting the RSTD of multipath components, the system can identify which components correspond to strong direct paths and which correspond to weaker reflected paths. The requesting entity can then use this information to selectively use higher frequency band measurements for positioning, accepting that some components will be attenuated but using only the most reliable measurements, thereby maintaining positioning accuracy while managing signal attenuation effects.
Solution Approach 2:
The patent changes the parameter for evaluating multipath components from signal strength alone to a combination of RSTD and component type. By introducing different RSTD thresholds for different multipath component types, the system can adapt to signal attenuation effects at higher frequency bands. Components that maintain sufficient RSTD values despite attenuation are selected for positioning, while attenuated components are filtered out, thereby preserving positioning accuracy while managing the harmful effect of signal attenuation.
Data Source
AI summary
Disclosed are techniques for enhanced multipath component reporting in new radio. In an aspect, a requesting entity (RE) may determine that a measuring entity (ME) can perform multipath phase measurements. The RE may send, to the ME, a first request to perform at least one multipath phase measurement. The RE may receive, from the ME, a first response to the first request, the first response comprising results of the at least one multipath phase measurement. The RE may determine a position or sense an object based on the results of the at least one multipath phase measurement.