Proactive Beam Switching for Multi-SIM User Equipment

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Solution Overview

Problem

Multi-SIM user equipment (UE) experiences delays and poor quality of service due to missed indications for beam switching, as resources are shared between subscriptions, leading to missed measurements and potential radio link failures when channel conditions worsen.

Innovation Solution

Implementing a timer mechanism for UE to automatically perform neighbor beam measurements and transmit reports if no indication is received from the base station, enabling proactive beam switching to mitigate poor channel conditions and reduce radio link failures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a multi-SIM UE shares resources between subscriptions, then device functionality and user convenience are improved, but beam measurement accuracy and timeliness deteriorate due to missed indications

Engineering Contradiction:

Improvemulti-SIM functionalityVSAvoidbeam measurement accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The UE proactively performs neighbor beam measurements and transmits reports before being explicitly indicated by the base station, especially when channel conditions deteriorate. This preliminary action ensures measurements are not missed due to resource sharing between SIMs, resolving the contradiction between multi-SIM functionality and measurement accuracy

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the UE waits for base station indication before measuring neighbor beams, then network control is improved, but service quality deteriorates due to delays in beam switching

Engineering Contradiction:

Improvenetwork controlVSAvoidbeam switching delay

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The UE dynamically adjusts its measurement behavior based on serving beam quality. When channel conditions are good, it waits for network indication (maintaining network control). When conditions deteriorate, it proactively performs measurements (reducing delay). This dynamic approach resolves the contradiction between network control and switching speed

Inventive Principle:

Principle #15Dynamics

3Reliability

If the UE performs proactive beam measurements, then reliability is improved by preventing radio link failures, but device complexity increases due to autonomous decision-making

Engineering Contradiction:

Improveradio link reliabilityVSAvoidautonomous measurement control

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The UE uses feedback from serving beam quality measurements to trigger proactive neighbor beam measurements. This feedback-based approach maintains simplicity by using a clear trigger condition (deteriorating serving beam quality) rather than complex autonomous decision-making, while still improving reliability through timely measurements

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11595866B2Beam switching for a multi-SIM user equipment

Publication Date: 2023.02.28 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, a beam measurement report associated with a serving beam of the UE. The UE may determine that a timer, relative to transmission of the beam measurement report, has expired. The UE may perform a measurement of one or more neighbor beams based at least in part on determining that the timer has expired. Numerous other aspects are provided.