Dual SIM Communication Path Management for Low-Delay Calls

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Solution Overview

Problem

Conventional dual SIM electronic devices face issues with call forwarding delays and inefficient battery consumption due to limited network state monitoring and communication path management, particularly in DSDS-type devices, where only one SIM can be actively used for calls while the other is restricted.

Innovation Solution

An electronic device with dual SIMs dynamically manages communication paths by registering second SIM information in an IMS server through a first SIM's communication path, allowing seamless call reception and origination across both SIMs, and adjusting paths based on real-time network states to minimize battery consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If call forwarding is applied to allow call reception through the second SIM while the first SIM is being used, then call reception capability is improved, but call transmission through the second SIM is not allowed and a predetermined time interval of delay occurs

Engineering Contradiction:

Improvecall reception capabilityVSAvoidcall transmission capability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent applies dynamics by making the communication path assignment flexible and changeable based on real-time conditions. The system dynamically switches between first and second communication paths depending on network states, signal strength, and operational requirements, allowing both call reception and transmission through either SIM without fixed delays or restrictions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes operational parameters by monitoring network states, signal strength, and call conditions in real-time. Based on these parameter changes, the system adjusts communication path assignments, enabling seamless switching between SIMs for both incoming and outgoing calls without predetermined time interval delays

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the electronic device checks network state of the second SIM through CFNRc or CFNR to enable call reception, then call forwarding function is improved, but a predetermined time interval of delay occurs until call reception

Engineering Contradiction:

Improvecall forwarding functionVSAvoidtime interval delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-establishing communication paths for both SIMs before actual call operations. The system performs preliminary path configuration and monitoring, so when a call arrives, the appropriate path is already ready, eliminating the need to check network states in real-time and reducing delays

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms that continuously monitor network states and signal strength, allowing the system to make real-time adjustments to communication paths. This continuous feedback loop ensures optimal path selection without requiring predetermined time interval checks, reducing delays while maintaining reliable call forwarding

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If the electronic device forwards call reception of the first SIM to the phone number of the second SIM and vice versa, then call reception through both SIMs is enabled, but the process needs to be performed twice

Engineering Contradiction:

Improvecall reception through both SIMsVSAvoidcall forwarding process

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the call forwarding processes by implementing a unified path management system that handles both SIMs simultaneously. Instead of performing separate forwarding operations for each SIM, the system uses a single integrated mechanism to manage communication paths for both SIMs, reducing complexity while enabling call reception through either SIM

Inventive Principle:

Principle #5Merging (Combining)

4Device complexity

If a DSDS-type electronic device uses one SIM at a time, then communication resources are simplified, but the other SIM cannot be used for calls or data communication

Engineering Contradiction:

Improvecommunication module structureVSAvoidSIM usage capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent applies universality by making the communication module capable of serving multiple SIMs with different functions. The same communication hardware and processing resources are used to handle calls, text messages, and data communication for either SIM, allowing a single device to provide DSDA-type functionality while maintaining relatively simple communication module structure

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent uses dynamics to enable flexible SIM usage by switching between different communication paths based on real-time conditions. The system can dynamically assign the first or second communication path to different SIMs depending on network states, signal strength, and operational requirements, allowing both SIMs to be used simultaneously or alternately without increasing hardware complexity

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250344127A1Method and device for controlling communication path of dual subscriber identification module according to call

Publication Date: 2025.11.06 SAMSUNG ELECTRONICS CO LTD

AI summary

Various embodiments of the present invention provide a method and device, the device comprising: a first subscriber identification module; a second subscriber identification module; a communication module; and a processor, wherein the processor is configured to receive a call request using the first subscriber identification module, change a communication path of the second subscriber identification module, and connect the call request using the first subscriber identification module by using the communication module. Various embodiments are possible.