Beam Reference Signal Fallback for Reliable Beam Information

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Solution Overview

Problem

Communication interruptions occur due to the inability of networks and User Equipment (UE) to determine beam information when target reference signals are not sent, resulting from issues like network congestion, unlicensed frequency band occupation, or severe fading, affecting system performance and user experience.

Innovation Solution

A method and apparatus that involve receiving indication information from a network side device and rolling back to a preset reference signal for transmission if the target reference signal does not meet a preset detection condition, ensuring correct beam switching or path loss measurement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If beam switching signaling is sent to improve communication efficiency, then system performance is improved, but communication interruption occurs when target reference signal cannot be detected

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidcommunication continuity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The network device pre-configures multiple reference signals (including target reference signals and fallback reference signals) before beam switching occurs. When beam switching signaling is sent, the terminal has alternative reference signals ready to use if the target reference signal cannot be detected, preventing communication interruption.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal detects whether the target reference signal meets detection conditions and provides feedback by selecting either the target reference signal or the fallback reference signal. This feedback mechanism ensures that beam switching only proceeds when conditions are favorable, maintaining communication reliability.

Inventive Principle:

Principle #23Feedback

2Loss of energy

If target reference signal is not sent due to network congestion or fading, then resource allocation is optimized, but beam information cannot be determined

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidbeam information

Core Design Contradiction:

Loss of energyVSLoss of information

Solution Approach 1:

The fallback reference signal acts as an intermediary that provides beam information when the target reference signal is not transmitted. This intermediary mechanism ensures that beam information can always be obtained, either from the target reference signal when resources are available or from the fallback reference signal when resources are constrained.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If beam switching is performed frequently to adapt to channel changes, then communication quality is improved, but system complexity increases

Engineering Contradiction:

Improvecommunication qualityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system changes the parameter of reference signal selection (between target and fallback) based on detection conditions without changing the overall beam switching framework. This parameter change approach allows adaptive response to channel conditions while maintaining system structure simplicity.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12538138B2Beam information determining method and apparatus, and electronic device

Publication Date: 2026.01.27 VIVO MOBILE COMM CO LTD

AI summary

A beam information determining method and electronic devices are provided. The beam information determining method is performed by a terminal, and the method includes: receiving indication information of a network side device; and in a case that a target reference signal corresponding to the indication information does not meet a preset detection condition, rolling back to a preset reference signal for transmission.