Virtual eUICC Architecture for SIM-Free IoT Network Switching
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Solution Overview
Problem
The integration of physical SIM cards into IoT devices increases the bill of materials and logistical complexities for OEMs, and the selection of mobile network operators is challenging due to the physical nature of SIM cards, leading to friction in accessing cellular networks globally.
Innovation Solution
Implementing a virtual reprogrammable universal integrated circuit chip (eUICC) on a connected device's application processor, secured by biometric information and a trusted execution environment, allowing secure communication with multiple cellular networks without physical SIM cards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical SIM cards are integrated into connected devices, then network connectivity is achieved, but device complexity and bill of materials increase due to required wireless modules and PCB integration
Solution Approach 1:
The patent creates a virtual copy of the SIM card functionality through software emulation in the application processor, eliminating the need for physical SIM card hardware integration while maintaining all network connectivity functions. The virtual SIM card application replicates the behavior and interface of a physical SIM card without requiring dedicated wireless modules or PCB integration.
2Reliability
If physical SIM cards are procured and integrated into devices, then network access is enabled, but logistical complexity and costs increase for OEMs and MNOs
Solution Approach 1:
The patent replaces the mechanical and logistical system of physical SIM card distribution, provisioning, and management with a software-based system. Network access is provisioned through software downloads and configuration rather than physical card distribution, eliminating kitting environments, physical integration steps, and logistical coordination between OEMs and MNOs.
3Reliability
If physical SIM cards are used for network access, then connectivity is provided, but the ability to dynamically switch networks is limited
Solution Approach 1:
The patent implements dynamic network switching capability through software configuration, allowing the virtual SIM card to change network operators, profiles, and configurations on-demand without physical intervention. Users can dynamically select from multiple network operators and switch between them based on coverage, pricing, or service requirements, providing adaptability that physical SIM cards cannot match.
4Device complexity
If virtual eUICC is implemented in application processor, then SIM card functionality is achieved without physical connection to baseband processor, but security challenges arise
Solution Approach 1:
The patent introduces a radio interface layer as an intermediary between the baseband processor and the virtual SIM card application in the application processor. This layered architecture maintains security boundaries while enabling communication, with the radio interface layer handling authentication and data transmission protocols to protect sensitive SIM card operations.
Data Source
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AI summary
Apparatuses, methods, and systems are provided for virtualizing a reprogrammable universal integrated circuit chip (UICC) in a connected device's operating system. In one embodiment, an integrated cellular modem in the connected device is configured to use a simple protocol to communicate with the reprogrammable UICC. The protocol may be implemented in a way that allows cellular modem vendors to easily support such functionality and allow original equipment manufacturers to upgrade connected devices already deployed in the field.