Dual-SIM PDN and IMS Control Through Shared RF Path

Solution Overview

Problem

Dual SIM electronic devices experience performance degradation and increased power consumption due to resource conflicts and paging conflicts when providing services via both SIM paths, particularly when using LTE connections.

Innovation Solution

The electronic device establishes a first Internet PDN connection through a designated data subscription SIM and performs a registration procedure with a second communication network via a second SIM, utilizing a single RF path to minimize resource conflicts and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the electronic device provides services via both SIM paths using separate RF paths, then both SIMs can operate simultaneously with full functionality, but resource conflicts and power consumption increase

Engineering Contradiction:

Improvedual SIM operation capabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent merges the RF paths by allowing the first SIM to use a single RF path for both Internet PDN connection and IMS service registration. This combines resources that would otherwise be separate, reducing overall power consumption while maintaining dual SIM functionality. The second SIM can share this RF path during specific operations, eliminating the need for completely separate RF infrastructure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system dynamically allocates the RF path between different SIMs based on operational requirements. The first SIM can exclusively use the RF path for Internet PDN connection, then share it for IMS service registration, while the second SIM waits or uses alternative paths when needed. This dynamic sharing optimizes power consumption by keeping the RF path active but efficiently utilized rather than maintaining permanent separate paths.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the electronic device provides services via both SIM paths using separate RF paths, then both SIMs can operate simultaneously with full functionality, but resource conflicts occur leading to performance degradation

Engineering Contradiction:

Improvedual SIM operation capabilityVSAvoidservice performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent merges the RF paths by allowing the first SIM to use a single RF path for both Internet PDN connection and IMS service registration. This combines resources that would otherwise be separate, reducing overall power consumption while maintaining dual SIM functionality. The second SIM can share this RF path during specific operations, eliminating the need for completely separate RF infrastructure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The first SIM acts as an intermediary that establishes the Internet PDN connection first, which then serves as a shared resource for both SIMs. The second SIM can utilize this established connection for IMS service registration without requiring a completely separate RF path, thereby reducing resource conflicts while maintaining service quality.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If the electronic device uses a single RF path for both SIMs, then power consumption is reduced and resource conflicts are minimized, but simultaneous operation capability is limited

Engineering Contradiction:

Improvepower consumptionVSAvoidsimultaneous operation capability

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The system dynamically allocates the RF path between different SIMs based on operational requirements. The first SIM can exclusively use the RF path for Internet PDN connection, then share it for IMS service registration, while the second SIM waits or uses alternative paths when needed. This dynamic sharing optimizes power consumption by keeping the RF path active but efficiently utilized rather than maintaining permanent separate paths.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The first SIM performs preliminary actions by establishing the Internet PDN connection first, which creates a foundation that the second SIM can build upon. This preliminary setup allows the second SIM to register for IMS services using the already-established connection, enabling sequential operations that maintain dual SIM functionality without requiring simultaneous exclusive access to separate RF paths.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250234396A1Electronic device for controlling packet data network connection and operation method therefor

Publication Date: 2025.07.17 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device is provided. The electronic device includes a radio frequency (RF) circuit, memory, comprising one or more storage media, storing instructions, and at least one processor communicatively coupled to the RF circuit and the memory, wherein the instructions, when executed by the at least one processor individually or collectively, cause the electronic device to establish a first Internet packet data network (PDN) connection associated with a first subscriber identity module (SIM), and, based on the first Internet PDN connection, perform a registration procedure with a second Internet protocol (IP) multimedia subsystem (IMS) connected to a second communication network, and wherein the first SIM is used for attaching to a first communication network and a second SIM is used for attaching to the second communication network.