Multi-IMSI SIM Roaming Control for Automatic Network Selection
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Solution Overview
Problem
Existing systems fail to provide efficient and cost-effective automatic selection of sponsors or networks for mobile subscribers, leading to usability issues and high costs due to the lack of seamless international roaming capabilities.
Innovation Solution
An IMSI management system that includes a smart applet on a SIM or eSIM with a large set of IMSIs and an IMSI control point, enabling automatic selection of the best signal strength and connection quality, and converting sponsor IMSIs to a home IMSI for seamless roaming without requiring individual contracts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single SIM card contains only one IMSI, then the system is simple and easy to manage, but the subscriber cannot achieve seamless international roaming or automatic network selection
Solution Approach 1:
The patent segments the traditional single-IMSI SIM card into a multi-IMSI SIM card containing multiple IMSI identifiers (at least two different IMSIs). This segmentation allows the SIM card to present different identities to different networks, enabling seamless international roaming and automatic network selection without requiring multiple physical SIM cards, thus improving adaptability while maintaining reasonable device complexity.
2Productivity
If the system automatically selects IMSI based on location, then roaming coverage is maximized and costs are reduced, but the system complexity increases due to automatic selection mechanisms
Solution Approach 1:
The patent implements a self-service mechanism where the mobile device automatically selects the appropriate IMSI based on its current location and network conditions without requiring manual user intervention. The device autonomously manages IMSI selection, network registration, and roaming operations, thereby maximizing roaming coverage and reducing costs while the automatic selection complexity is contained within the device's communication management functions.
3Adaptability or versatility
If multiple IMSIs are stored on a single SIM card, then roaming coverage is improved, but the management and control of these IMSIs becomes more complex
Solution Approach 1:
The patent introduces an IMSI management system that acts as an intermediary between the multiple IMSIs stored on the SIM card and the external networks. This management system automatically handles IMSI selection, network registration, and roaming operations, shielding the user from the complexity of managing multiple IMSIs while maximizing network compatibility and roaming coverage.
4Ease of operation
If manual IMSI selection is required, then the system is simple to implement, but user convenience is reduced and usability problems occur
Solution Approach 1:
The patent implements a self-service mechanism where the mobile device automatically selects the appropriate IMSI based on its current location and network conditions without requiring manual user intervention. The device autonomously manages IMSI selection, network registration, and roaming operations, thereby maximizing roaming coverage and reducing costs while the automatic selection complexity is contained within the device's communication management functions.
Data Source
AI summary
An International Mobile Subscriber Identity (IMSI) management system (100, 200) includes a subscriber identity module (SIM) or eSIM (102), a smart applet (104) on the SIM or eSIM having a plurality or large set of IMSIs on the SIM or eSIM which provides registration to roaming subscribers, and an IMSI control point (106) that serves as a node to control the service provision to a home network operator by converting a sponsor's IMSIs to a home IMSI of the home network operator in a home network (210).