RIS Reflect Beam Selection Using Reflected Power Angle Spectrum

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently selecting and utilizing reflect beams for improved coverage and spectral efficiency, particularly in environments where anomalous reflections occur, leading to inefficiencies in power and resource allocation.

Innovation Solution

A beam reflecting device, such as a reconfigurable intelligent surface (RIS), is used to select and transmit reflected power angle spectrum (RPAS) information, allowing a transmitting device to efficiently allocate beam resources by informing it about the set of realizable reflect beams and their attributes, thereby enhancing flexibility and reducing power and processing resource consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If beam reflecting devices are used to improve coverage and spectral efficiency, then communication performance is improved, but device complexity and processing resource consumption increase

Engineering Contradiction:

Improvecommunication performanceVSAvoidprocessing resource consumption

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The beam reflecting device pre-calculates and determines the set of realizable reflect beams and their attributes before actual communication occurs. This preliminary action allows the device to prepare beam information in advance, reducing the need for complex real-time processing during communication operations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary information exchange mechanism where the beam reflecting device provides RPAS information to the transmitting device. This intermediary approach allows the transmitting device to make informed beam selection decisions without the beam reflecting device needing to perform complex real-time beam management operations.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple reflect beams are selected to enhance flexibility in UE selection, then adaptability is improved, but power consumption and signaling resources increase

Engineering Contradiction:

Improveflexibility in UE selectionVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent changes the parameter representation by encoding beam information in a compact RPAS format that includes only essential attributes of reflect beams. This parameter optimization allows multiple beams to be represented efficiently, reducing the power and signaling resources needed to transmit beam information while maintaining flexibility in UE selection.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If comprehensive beam information is transmitted to improve beam resource allocation, then productivity is improved, but loss of information and signaling overhead increase

Engineering Contradiction:

Improvebeam resource allocation efficiencyVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent extracts only the essential and most relevant beam attributes needed for effective beam resource allocation, removing redundant information from the transmitted data. This extraction approach includes key parameters such as beam directions and basic characteristics while excluding unnecessary details, thereby reducing signaling overhead while maintaining allocation efficiency.

Inventive Principle:

Principle #2Taking out (Extraction)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach enables more efficient allocation of beam resources, conserving power, processing, and signaling resources while providing enhanced flexibility in UE selection and improving end-to-end channel performance.

Implementation Method 1

a beam reflecting device to select and transmit reflected power angle spectrum (RPAS) information

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS12580634B2Reflect beam selection for power angle spectrum

Publication Date: 2026.03.17 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a beam reflecting device may receive target reflection angle information that indicates a target reflection angle range for reflect beams. The beam reflecting device may select one or more reflect beams based at least in part on the target reflection angle information. The beam reflecting device may transmit reflected power angle spectrum information that indicates the one or more reflect beams. Numerous other aspects are described.