Multi-SIM Connection Recovery Using Local KI and Cloud SIM Fallback
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Solution Overview
Problem
Existing communication systems fail to establish connections when physical or virtual SIM cards malfunction, leading to disruptions in cloud communication due to reliance on a single SIM card for authentication, which can be caused by manufacturing defects, environmental factors, or unsupported network modes.
Innovation Solution
A multi-SIM terminal device stores multiple key identifier (KI) card information, allowing it to establish a first communication connection using non-roaming or roaming KI card information, and then acquires cloud SIM card information to ensure a stable second connection, even in the event of SIM card failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single physical or virtual SIM card is used for authentication, then the terminal device structure is simplified and cost is reduced, but the reliability of communication connection establishment deteriorates when the SIM card fails
Solution Approach 1:
The terminal device pre-stores multiple KI card information sets (roaming and non-roaming) before actual communication needs arise. When SIM card failure occurs, the system can immediately switch to using pre-stored KI information to establish connections, eliminating the need for physical SIM card insertion or complex real-time authentication procedures.
Solution Approach 2:
The patent introduces cloud SIM card information as an intermediary solution. When the physical/virtual SIM card fails, the system retrieves cloud-based SIM information through alternative authentication methods using stored KI data, serving as a mediator that bridges the gap between failed local authentication and successful network connection.
2Reliability
If multiple KI card information sets are stored to ensure connection success, then the reliability of communication connection establishment is improved, but the device complexity and memory requirements increase
Solution Approach 1:
The patent extracts only the essential authentication elements (KI card information) needed for connection establishment, storing them in a streamlined format. Rather than storing complete SIM card images or extensive authentication data, the system stores compact KI information sets that can be quickly retrieved and used for authentication, minimizing memory requirements while maintaining reliability.
3Adaptability or versatility
If roaming KI card information is used when non-roaming information is unavailable, then the adaptability to different network environments is improved, but communication costs increase
Solution Approach 1:
The system dynamically selects between roaming and non-roaming KI card information based on real-time network conditions and availability. The selection logic adapts to the current environment, choosing non-roaming information when available (to save costs) and switching to roaming information when necessary (to maintain connectivity), optimizing both cost and adaptability.
Data Source
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AI summary
A method for establishing communication connections is provided. The method includes: in response to a failure of a SIM card, acquiring first KI card information, wherein in the case that locally stored roaming KI card information and non-roaming KI card information are both available, the first KI card information is the non-roaming KI card information, and in the case that the locally stored roaming KI card information is available whereas the non-roaming KI card information is not available, the first KI card information is the roaming KI card information; establishing a first communication connection to a cloud SIM card management platform based on the first KI card information; acquiring cloud SIM card information from the cloud SIM card management platform over the first communication connection; and establishing a second communication connection based on the cloud SIM card information. In the case that the multi-SIM terminal device establishes the second communication connection based on the cloud SIM card information, the first communication connection may be disconnected, and the KI card information may be released. With the solutions, a success rate of establishing the first communication connection may be ensured on the premise of saving fees for users.