Adapting Subscriber Identity Module Card Profile
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Solution Overview
Problem
The challenge lies in producing and distributing SIM cards that can support various wireless protocols, device brands, and models, as traditional SIM cards are typically engineered for specific combinations, leading to logistics and efficiency issues in the open mobile device business model where users need to activate their own devices with different wireless communication service providers.
Innovation Solution
A morphing SIM card that stores components for multiple SIM profiles, determines the specific wireless protocol, device brand, and model, builds a suitable profile, and initiates the device accordingly, avoiding the need for separate SIM kits for each combination of protocol, brand, and model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional SIM cards are engineered for specific combinations of wireless protocols, device brands, and models, then each SIM card can reliably support its designated device type, but the complexity and cost of producing and distributing multiple SIM card variants increases significantly
Solution Approach 1:
The SIM card is designed to perform multiple functions by storing components for multiple different SIM profiles (USIM, CSIM, ISIM) and automatically selecting the appropriate profile based on the device it is installed in. This allows a single SIM card design to replace multiple device-specific SIM card variants, reducing production complexity while maintaining reliable compatibility across different device types.
Solution Approach 2:
The SIM card incorporates dynamic profile selection capability where the initiation application reads device identity information and automatically builds the appropriate SIM profile from stored components based on the detected device type. This dynamic adaptation allows the SIM card to adjust its configuration in real-time rather than being static for a specific device type.
2Adaptability or versatility
If separate SIM kits are produced for each combination of protocol, brand, and model, then each device receives the correct SIM configuration, but the logistics and distribution burden increases
Solution Approach 1:
A single universal SIM card design can be distributed to all device types, eliminating the need for multiple device-specific SIM kit variants. The SIM card's ability to store multiple profile components and automatically select the appropriate profile enables it to adapt to any device it is installed in, greatly simplifying distribution logistics while maintaining full adaptability.
Solution Approach 2:
The SIM card performs self-configuration by automatically detecting the device type through the initiation application reading device identity information and then building the appropriate SIM profile from its stored components without requiring manual configuration or pre-packaging for specific device types. This self-service capability eliminates the need for complex pre-configuration logistics.
3Device complexity
If a single SIM card stores components for multiple SIM profiles, then the number of SIM card variants needed is reduced, but the memory requirements and initial configuration complexity of the SIM card increases
Solution Approach 1:
The SIM card stores profile components in a segmented structure where different components (USIM components, CSIM components, ISIM components) are stored separately but can be dynamically assembled into complete profiles. This segmentation allows efficient use of memory space by storing individual components that can be recombined as needed, rather than storing complete duplicate profiles for each device type.
Solution Approach 2:
The SIM card pre-stores multiple profile components during manufacturing, but the complete SIM profile is only built and assembled when needed based on the detected device type. This preliminary preparation of components without full profile assembly reduces initial memory requirements while enabling rapid configuration when the SIM card is activated in a specific device.
Data Source
AI summary
A subscriber identity module (SIM) card. The SIM card comprises a processor and a non-transitory memory that stores an initiation application and a plurality of profile components, where the plurality of components comprise the components of a USIM, the components of a CSIM, and the components of an ISIM. When executed by the processor, the initiation application looks up a profile identity in a table of profile identities stored in the non-transitory memory based on an identity of a brand and model of a mobile communication device with which the SIM card is associated, builds a SIM profile associated with the looked-up profile identity from the plurality of profile components, where the SIM profile comprises an international mobile subscriber identity (IMSI), a file that defines roaming behavior, and mobile network authentication keys, and sends at least some of the contents of the SIM profile to the radio transceiver.