Dual SIM Field Device Connection Switching for IoT Cloud Reliability
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Solution Overview
Problem
Industrial sensors or field devices with internally installed SIM cards are configured for a specific cloud service and cannot be modified by users, limiting flexibility and potential cost savings from alternative data plans.
Innovation Solution
A field device with an integrated first chip card and an interchangeable second chip card, allowing user-defined parameter sets, where the device prioritizes the second chip card for connection if verified, and switches to the first if the second fails, ensuring a reliable connection to a cloud service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an internally installed SIM card is configured for a specific cloud service, then connection reliability is ensured, but user flexibility and adaptability are limited
Solution Approach 1:
The SIM card functionality is segmented into two separate physical cards: a first SIM card with a first parameter set for primary cloud service connection, and a second SIM card with a second parameter set for alternative connection. This segmentation allows the system to maintain reliable connection through the primary SIM while providing user flexibility through the interchangeable second SIM card.
Solution Approach 2:
The field device is designed with universal SIM card slot capability that can accept different SIM cards. The interface is configured to work with multiple parameter sets, enabling the device to function with different cloud service providers while maintaining the same operational interface and connection management logic.
2Device complexity
If a single parameter set is used for cloud service connection, then device complexity is reduced, but adaptability to different data plans and cloud services is limited
Solution Approach 1:
Parameter sets are segmented into multiple independent configurations stored on separate SIM cards. Each SIM card contains a complete parameter set for a specific cloud service provider, allowing the device to switch between providers without complex reconfiguration while maintaining simple individual parameter sets.
Solution Approach 2:
The device uses copied parameter sets from different SIM cards that are identical in structure and format. This allows the system to maintain simple, consistent parameter handling logic while supporting multiple cloud service providers through physical card replacement rather than complex software configuration.
3Loss of energy
If the device prioritizes the second parameter set for connection, then cost savings from alternative data plans are achieved, but connection stability may be compromised
Solution Approach 1:
The device performs preliminary verification of the second parameter set before attempting connection. The control unit checks whether the second parameter set can successfully establish a connection to the cloud service before prioritizing its use, thereby ensuring cost savings without compromising connection stability.
Solution Approach 2:
The system implements feedback mechanisms where the control unit monitors connection status and performance. If the second parameter set fails to establish a stable connection, the system automatically switches to the first parameter set, providing feedback-driven adaptation that balances cost efficiency with connection reliability.
Data Source
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AI summary
The invention relates to a field device 100 comprising an integrated first chip card 101 with a first parameter set and an interface 104 to an interchangeable second chip card 102. The interface 104 is configured to receive a second parameter set from the second chip card 102. The field device 100 is configured to establish a connection to a cloud service using the first and/or second parameter set.