Multi-SIM DDS Management with Consolidated Switch Recommendations

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Solution Overview

Problem

Existing wireless communication systems with multiple subscriber identity modules (SIMs) face inefficiencies in managing data subscriptions, leading to unresolved switch recommendations, unnecessary switching, and inefficiencies due to back-to-back temporary and permanent data subscription (DDS) switches.

Innovation Solution

Implementing techniques to manage DDS states through recommendation consolidation and DDS switch request handling, allowing UEs to efficiently handle temporary and permanent DDS switches, and avoid unresolved states and excessive switching by consolidating recommendations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple SIMs are included in a device to meet expanded mobile broadband connectivity demands, then adaptability and versatility are improved, but device complexity and management difficulty increase

Engineering Contradiction:

Improvemobile broadband connectivityVSAvoiddata subscription management

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple DDS switch recommendations into a single consolidated recommendation to simplify management. The modem consolidates multiple temporary and permanent DDS switch recommendations from different subscriptions into one unified recommendation, reducing the complexity of managing multiple SIMs while maintaining adaptability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The modem acts as an intermediary between multiple SIM subscriptions and the processor. It receives multiple DDS switch recommendations from different subscriptions, consolidates them, and presents a single unified recommendation to the processor, thereby simplifying the management interface while supporting multiple SIMs.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If temporary DDS switches are performed frequently to handle ongoing communications, then ease of operation is improved, but excessive switching and unresolved states occur

Engineering Contradiction:

Improvedata subscription switchingVSAvoidsubscription state stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs preliminary consolidation of multiple DDS switch recommendations before executing the switch. By consolidating recommendations in advance and evaluating their validity, the system avoids excessive switching and unresolved states while maintaining operational flexibility.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms to evaluate DDS switch recommendations before execution. The processor evaluates the consolidated recommendation, determines whether to proceed with the switch, and provides feedback to the modem, thereby preventing excessive switching and maintaining state stability.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If permanent DDS switch recommendations are sent during temporary DDS switches, then adaptability is improved, but unresolved switch recommendations and switching conflicts occur

Engineering Contradiction:

Improvesubscription management flexibilityVSAvoidswitch recommendation management

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges multiple DDS switch recommendations including both temporary and permanent types into a single consolidated recommendation. This consolidation occurs before the recommendation is sent to the processor, eliminating conflicts and unresolved states while maintaining management flexibility.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system performs preliminary consolidation and evaluation of permanent DDS switch recommendations even during temporary DDS switches. By evaluating the validity and timing of permanent recommendations in advance, the system avoids conflicts while maintaining adaptability in subscription management.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12375897B2Management of default data subscription (DDS) in multi-subscriber identity module devices

Publication Date: 2025.07.29 QUALCOMM INC

AI summary

A method of wireless communication performed by a user equipment (UE) includes: operating in a Dual SIM Dual Active (DSDA) mode or a Dual SIM Dual Standby (DSDS) mode in which a first subscriber identity module (SIM) is designated as a default data subscription (DDS); determining a recommendation to change the DDS from the first SIM to a second SIM at a modem; informing a user of the recommendation to change the DDS; changing the DDS in response to, at least in part, the recommendation and an input from the user; updating a first state variable to indicate a state of the DDS; and routing internet data to the second SIM.