Enhanced solution separation receiver autonomous integrity monitoring for positioning engine

WO2026111851A3PCT designated stage Publication Date: 2026-07-23QUALCOMM INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
QUALCOMM INC
Filing Date
2025-10-23
Publication Date
2026-07-23

AI Technical Summary

Technical Problem

Existing wireless communication systems, particularly 5G NR, face challenges in improving positioning protocols and techniques for high-accuracy location services, with a need for enhanced receiver autonomous integrity monitoring (RAIM) to ensure accurate positioning calculations.

Method used

A method and apparatus that estimate positions using all space vehicles (SVs) and subsets of SVs, excluding positions with high weighted sum of squared residuals or negative computed residuals, and perform solution separation (SS) evaluation based on validated positions, utilizing a position validator module to eliminate outliers and improve computation efficiency.

Benefits of technology

Enhances the performance of SS RAIM by validating high-accuracy subset positions, enabling early exit for fault modes and reducing the likelihood of incorrect SV exclusion, thereby improving the accuracy and efficiency of positioning calculations.

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Abstract

Aspects presented herein may enable a UE to eliminate low accuracy "subset positions" and / or "all-in-view position" from a solution separation (SS) receiver autonomous integrity monitoring (RAIM) (SS RAIM) evaluation, thereby improving the computation efficiency for the SS RAIM. In one aspect, a UE estimates a plurality of positions of the UE using all space vehicles (SVs) in a list of SVs and a plurality of subsets of SVs in the list of SVs. The UE excludes a set of positions in the plurality of positions from an SS evaluation if at least one of: (1) a weighted sum of squared residual (WSS) of the set of positions is greater than a chi-square threshold, or (2) a computed residual of the set of positions indicates a negative value. The UE performs the SS evaluation based on rest of the plurality of positions.
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