Dynamic SIM Switching Between Physical and Cloud Cards
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Solution Overview
Problem
Existing solutions for Dual SIM Dual Standby systems do not allow seamless switching between physical SIM cards and cloud SIM cards, particularly when physical SIM cards are out of coverage or during international roaming, limiting network access and coverage.
Innovation Solution
A method for dynamically detecting network status and switching between physical SIM cards and cloud SIM cards, including downloading and activating cloud SIM cards from a cloud server, and switching between multiple cloud SIM cards based on signal strength, ensuring continuous network access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a physical SIM card is used for network access, then network service is provided, but network access is lost when the physical SIM card is out of coverage or during international roaming
Solution Approach 1:
The patent introduces a cloud SIM card as an intermediary solution between the physical SIM card and the network. When the physical SIM card fails to access the network (out of coverage or international roaming), the system automatically switches to a cloud SIM card that provides alternative network access through cloud-based virtualization, thereby maintaining network connectivity without requiring physical SIM card changes.
Solution Approach 2:
The system dynamically changes the network access parameter by switching between physical SIM card mode and cloud SIM card mode based on network conditions. The wireless device monitors network status and automatically transitions from physical SIM card to cloud SIM card when coverage is lost, and switches back when physical SIM card coverage is restored, optimizing network access reliability.
2Reliability
If cloud SIM cards are introduced to extend network coverage, then network access reliability improves, but system complexity increases due to multiple SIM card types and switching mechanisms
Solution Approach 1:
The system implements automatic self-service switching between physical SIM cards and cloud SIM cards based on network status detection. The wireless device autonomously monitors network coverage, determines when switching is needed, and executes the switch without user intervention. This automation reduces the perceived complexity for users while maintaining the sophisticated multi-SIM architecture in the background.
Solution Approach 2:
The SIM card configuration is made dynamic rather than static. The system continuously adapts the active SIM card type (physical or cloud-based) based on real-time network conditions, location, and service requirements. This dynamic switching capability allows the system to handle multiple SIM card types without requiring complex manual management, as the switching logic is automatically adjusted to current operational needs.
3Adaptability or versatility
If seamless switching between SIM cards is implemented, then network coverage is improved, but switching time and processing overhead increase
Solution Approach 1:
The system performs preliminary actions by pre-configuring and pre-authenticating cloud SIM cards before they are needed. The cloud SIM card infrastructure is prepared in advance, and authentication credentials are cached or pre-established, enabling rapid switching when physical SIM card coverage is lost. This preliminary preparation significantly reduces the switching time compared to on-demand provisioning.
Data Source
AI summary
A method for switching between different SIM cards for wireless service includes detecting a status of a network used for voice and data and determining if a physical SIM card is a network card in a wireless client. When the physical SIM card is the network card, the method includes determining whether the wireless client includes one or more cloud SIM cards. When the wireless client includes one or more cloud SIM cards, the method further includes detecting a network status of the physical SIM card and assessing whether the network status of the physical SIM card or the status of the network requires using the one or more cloud SIM cards. When the one or more cloud SIM cards are required, the method includes switching the network card from the physical SIM card to the one or more cloud SIM cards.