Dual SIM Call Management via IMS VoIP Application

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Solution Overview

Problem

Users need to carry two mobile devices or use separate devices to manage calls for multiple numbers, as existing solutions do not allow the first number to initiate calls using a second number on the same device, especially in GSM networks.

Innovation Solution

A mobile VoIP application in a mobile IMS network that enables users to manage and initiate calls using both numbers on a single device without additional hardware or software, utilizing SIP and SRTP protocols for voice transmission and registration through a signaling management unit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If users carry two mobile devices to manage calls for multiple numbers, then call management capability is improved, but device complexity and portability are worsened

Engineering Contradiction:

Improvecall management capabilityVSAvoiddevice portability

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple number capabilities into a single mobile device by implementing a dual SIM card system. The first SIM card and second SIM card are both installed in one device, allowing the user to manage calls for multiple numbers without carrying separate devices. The system integrates call handling, messaging, and data services for both numbers within a single device environment.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mobile device is designed to perform multiple functions simultaneously - it can make and receive calls on both the first number and second number, send and receive SMS messages on both numbers, and access data services for both SIM cards. This multi-functionality eliminates the need for separate dedicated devices for each number.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If call forwarding service is used to answer calls on the first device, then incoming call reception is improved, but outgoing call initiation capability is worsened

Engineering Contradiction:

Improveincoming call receptionVSAvoidoutgoing call initiation capability

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The system segments call handling functions by assigning specific capabilities to each SIM card while allowing both to operate within the same device. The first SIM card handles incoming call forwarding, while the second SIM card enables outgoing call initiation. This segmentation allows each function to be optimized independently while working together in the unified device environment.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If a virtual phone application is used to provide call services, then service flexibility is improved, but network dependency is worsened

Engineering Contradiction:

Improveservice flexibilityVSAvoidnetwork dependency

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces an application server as an intermediary between the mobile device and the network infrastructure. The application server receives registration requests from the device, manages the dual SIM card configurations, and coordinates call routing between the first and second numbers. This intermediary layer provides service flexibility while maintaining reliable direct cellular network connections for both SIM cards.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11825550B2System for initiating and receiving call over a second number

Publication Date: 2023.11.21 TURKCELL TEKNOLOJI ARASTIRMA & GELISTIRME AS

AI summary

The present invention relates to a system which enables users to use call capabilities of their mobile second numbers over a device wherein their first numbers are included without carrying a second device by means of a mobile application in a mobile IMS (IP Multimedia Subsystem) network.