MSIM Cross-Switch Management for SRS Antenna Switching

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Solution Overview

Problem

In wireless communication systems using multiple subscriber identity modules (MSIMs), concurrent operations can lead to performance degradation as activities of one SIM may interfere with those of another, particularly due to SRS antenna switching, which affects idle mode activities of other SIMs.

Innovation Solution

A transceiver management component in user equipment (UE) determines whether SIMs share a cross-switch and modifies concurrent operations to avoid degradation by limiting or suspending SRS antenna switching during certain activities of other SIMs, such as idle mode operations, based on factors like operating bands and antenna usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If SRS antenna switching is performed for a first SIM, then communication performance for the first SIM is improved, but performance of idle mode activities for a second SIM deteriorates

Engineering Contradiction:

Improvecommunication performanceVSAvoidperformance degradation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary detection to identify whether SIMs share a cross-switch before allowing concurrent operations. The UE determines in advance whether a first SIM and second SIM will share a cross-switch, and proactively limits or suspends SRS antenna switching when sharing is detected, preventing performance degradation before it occurs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts SRS antenna switching behavior based on real-time detection of cross-switch sharing conditions. The UE modifies concurrent operations by limiting or suspending SRS antenna switching when SIMs are detected to share a cross-switch, and resumes normal operation when the condition changes, creating a dynamic adaptive system

Inventive Principle:

Principle #15Dynamics

2Productivity

If concurrent operations are allowed for multiple SIMs, then productivity is improved, but performance degradation occurs due to resource sharing conflicts

Engineering Contradiction:

Improveconcurrent operation capabilityVSAvoidperformance stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system implements feedback mechanisms where the UE continuously monitors and detects whether SIMs share cross-switch resources. Based on this feedback, the UE dynamically modifies concurrent operations by limiting or suspending SRS antenna switching when conflicts are detected, allowing the system to adapt to resource sharing conditions and maintain performance stability

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes operational parameters (enabling or disabling SRS antenna switching) based on detected conditions. When cross-switch sharing is detected, the system modifies the SRS antenna switching parameter to prevent performance degradation, thereby maintaining reliable operation across multiple SIMs while preserving concurrent operation capabilities

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11496881B2Managing MSIM concurrent activities

Publication Date: 2022.11.08 QUALCOMM INC

AI summary

A method, a computer-readable medium, and an apparatus are provided for wireless communication at a user equipment (UE). The apparatus determines that a first subscriber identity module (SIM) and a second SIM of the UE share a cross switch and determines whether to modify concurrent operation of the first SIM or the second SIM based, at least in part, on a determination that the first SIM and the second SIM of the UE share the cross-switch. The concurrent operation of the first SIM and the second SIM may include the first SIM performing SRS antenna switching and the second SIM performing an idle mode activity.