CSI-RS Based UE Beam Selection for Multi-Carrier Spectral Efficiency

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently selecting the optimal user equipment (UE) beam for communication links, particularly in environments with multiple component carriers and varying channel conditions.

Innovation Solution

The method involves identifying parameters associated with the communication link, enabling channel state information reference signal (CSI-RS)-based UE beam selection, receiving a set of CSI-RSs, and selecting a UE beam based on the CSI-RSs to optimize spectral efficiency across multiple component carriers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional beam selection methods are used, then device complexity is reduced, but spectral efficiency deteriorates in multi-component carrier environments

Engineering Contradiction:

Improvespectral efficiencyVSAvoidbeam selection complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces CSI-RS as an intermediary mechanism that mediates between the complex multi-component carrier channel state information and the beam selection process. The CSI-RS provides structured reference signals that enable efficient channel measurement and beam evaluation, resolving the contradiction by creating an intermediate layer that simplifies the selection process while maintaining high spectral efficiency

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the parameter basis for beam selection from traditional metrics to CSI-RS based metrics. By utilizing CSI-RS measurements and channel state information parameters, the system achieves more accurate beam selection across multiple component carriers, improving spectral efficiency while the structured parameter changes provide a systematic approach that manages complexity

Inventive Principle:

Principle #35Parameter changes

2Productivity

If CSI-RS-based beam selection is implemented, then spectral efficiency is improved, but measurement and detection difficulty increases

Engineering Contradiction:

Improvespectral efficiencyVSAvoidchannel state information measurement

Core Design Contradiction:

ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent segments the beam selection process into distinct phases: CSI-RS transmission, channel measurement, beam evaluation, and selection. By dividing the complex measurement and detection task into manageable segments across multiple component carriers, the system improves spectral efficiency while making the measurement process more tractable through structured segmentation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary actions by pre-configuring CSI-RS resources and parameters before actual beam selection. The system prepares measurement configurations, reference signal patterns, and evaluation criteria in advance, which simplifies the actual measurement and detection process while enabling high spectral efficiency through pre-optimized beam selection criteria

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250158680A1Techniques for channel state information reference signal-based user equipment beam selection

Publication Date: 2025.05.15 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify one or more parameters associated with a communication link. The UE may enable, based at least in part on the identified one or more parameters, channel state information reference signal (CSI-RS)-based UE beam selection. The UE may receive a set of CSI-RSs. The UE may select a UE beam based at least in part on the CSI-RSs. Numerous other aspects are described.