Beam Shape Signaling for Accurate UE Angle Positioning

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Solution Overview

Problem

Existing wireless communication systems, particularly in the context of 5G, face challenges in accurately determining the angle between user equipment (UE) and base stations due to the lack of effective beam shape assistance information for downlink transmit beams, which affects positioning accuracy.

Innovation Solution

The method involves receiving beam shape assistance information for downlink transmit beams with quantization and using signal strength measurements of positioning reference signals to determine the angle between the UE and the base station, enabling more precise positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If beam shape assistance information is provided for downlink transmit beams, then positioning accuracy is improved, but signaling overhead and system complexity increase

Engineering Contradiction:

Improvepositioning accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies local quality by providing beam shape assistance information selectively for specific downlink transmit beams rather than uniformly for all beams. The network entity configures beam shape information based on the specific positioning requirements and beam characteristics, allowing detailed assistance data only where needed for accurate angle determination, thus balancing positioning accuracy with signaling overhead.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent utilizes parameter changes by representing beam shape information through quantized parameters such as beam width and beam direction. The network entity configures these parameters dynamically based on the serving cell's beamforming characteristics, enabling the UE to determine angles with improved precision while managing the amount of signaling data through controlled parameter quantization.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If quantized beam shape assistance data is used, then angle determination precision is improved, but information loss due to quantization occurs

Engineering Contradiction:

Improveangle determination precisionVSAvoidbeam shape information accuracy

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent applies partial action by using quantized beam shape parameters that provide sufficient precision for angle determination without transmitting complete continuous beam shape information. The quantization level is optimized to provide just enough detail for accurate positioning while avoiding excessive data transmission, thus balancing precision requirements with information loss constraints.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12519527B2Optimization of signaling for beam shape assistance data for mobile device location

Publication Date: 2026.01.06 QUALCOMM INC

AI summary

Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) receives, from a network entity, beam shape assistance information for one or more downlink transmit beams of a base station, the beam shape assistance information representing a beam shape of each of the one or more downlink transmit beams, the beam shape of each of the one or more downlink transmit beams having a quantization, and determines an angle between the UE and the base station based at least on the beam shape assistance information and signal strength measurements of positioning reference signal resources transmitted on the one or more downlink transmit beams.