Fast Antenna Diversity Switching for Radio Link Reliability

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Solution Overview

Problem

Existing wireless communication systems face delays in antenna switched diversity evaluation due to long delays in evaluating and switching transmit antennas, which can lead to radio link failures and resource wastage.

Innovation Solution

Implementing a fast antenna switched diversity evaluation method that allows UEs to quickly switch antennas based on real-time signal measurements upon detecting triggering conditions, reducing evaluation time from over a second to 100-200 ms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional antenna evaluation methods are used, then measurement accuracy is maintained, but evaluation time exceeds 1 second causing radio link failures

Engineering Contradiction:

Improveradio link reliabilityVSAvoidantenna evaluation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary actions by continuously monitoring triggering conditions and preparing antenna switching configurations in advance. When a triggering condition is detected (such as signal quality degradation), the UE already has measurement configurations ready and can immediately initiate antenna switching without waiting for full evaluation cycles, thus reducing evaluation time while maintaining reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where the UE continuously monitors signal measurements from multiple antennas and compares them against triggering conditions. This feedback loop enables dynamic adjustment of antenna selection based on real-time signal quality, allowing the system to respond quickly to changing conditions without requiring lengthy evaluation periods

Inventive Principle:

Principle #23Feedback

2Loss of time

If fast antenna switching is implemented, then evaluation time is reduced to 100-200 ms, but measurement accuracy may be compromised

Engineering Contradiction:

Improveantenna evaluation timeVSAvoidsignal measurement accuracy

Core Design Contradiction:

Loss of timeVSMeasurement precision

Solution Approach 1:

The system applies partial action by performing measurements and evaluations selectively rather than continuously. The UE monitors triggering conditions and only initiates full measurement sequences when necessary (e.g., when signal degradation is detected). This partial measurement approach reduces overall evaluation time while maintaining sufficient accuracy for reliable antenna switching decisions

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system changes measurement parameters dynamically based on triggering conditions. When a triggering condition is detected, the UE adjusts measurement configurations to prioritize speed over completeness, using simplified measurement criteria that are sufficient for rapid antenna selection. This parameter adaptation allows fast switching while maintaining adequate measurement accuracy for the specific operational context

Inventive Principle:

Principle #35Parameter changes

3Reliability

If continuous antenna monitoring is performed, then antenna blockages are detected early, but power and signaling resources are wasted

Engineering Contradiction:

Improveantenna blockage detectionVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The system implements periodic action by monitoring triggering conditions at regular intervals rather than continuously performing full antenna evaluations. The UE checks for triggering conditions periodically and only initiates comprehensive measurements when conditions change, this periodic monitoring approach detects antenna blockages timely while significantly reducing power and signaling resource consumption compared to continuous monitoring

Inventive Principle:

Principle #19Periodic action

4Measurement precision

If comprehensive signal measurements are taken for all antennas, then switching accuracy is improved, but processing time increases

Engineering Contradiction:

Improvesignal measurement accuracyVSAvoidantenna switching speed

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system implements skipping by bypassing certain measurement steps when triggering conditions indicate urgent need for antenna switching. When a triggering condition is detected, the UE skips non-critical measurement procedures and focuses only on essential signal quality comparisons, this rushing through of unnecessary steps enables fast antenna selection while maintaining adequate accuracy for the specific operational context

Inventive Principle:

Principle #21Skipping (Rushing through)

Data Source

PatentUS12526747B2Fast antenna switched diversity

Publication Date: 2026.01.13 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform a fast antenna switched diversity evaluation by obtaining at least two signal measurements for each transmit antenna of the UE based at least in part on detecting one or more triggering conditions for switching one or more transmit antennas of the UE. The UE may switch the one or more transmit antennas based at least in part on the at least two signal measurements for each transmit antenna. Numerous other aspects are described.