eSIM Programming via RF Shielded Chamber for Low Power IoT
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Solution Overview
Problem
Low power IoT devices lack the user interface and power efficiency to download and configure SIM profiles using eSIMs, which is crucial for cellular connectivity, and existing methods consume battery life, affecting their long-term performance.
Innovation Solution
The implementation of an eSIM activation system that uses an RF shielded chamber for over-the-air communication, wireless power supply, and simulated base station testing, allowing for eSIM programming and verification without a user interface and minimizing battery drain, utilizing a wireless power supply and short-range wireless radio to isolate power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If eSIM programming is performed using conventional methods (downloaded profile via application on the device), then the device can connect to cellular networks, but battery power is consumed and user interface is required
Solution Approach 1:
The SIM profile is downloaded and programmed into the eSIM before the device is activated or before it needs to connect to the cellular network. This preliminary action is performed during manufacturing or initial setup, eliminating the need for battery-powered operations later. The profile is pre-configured and stored in the eSIM's non-volatile memory, ready for immediate use without requiring additional power consumption for downloading.
2Adaptability or versatility
If eSIM programming is performed using application on the device, then the SIM profile can be configured, but user interface and internet connection are required
Solution Approach 1:
The eSIM programming functionality is extracted from the user device and relocated to external systems. Instead of requiring a user interface and application on the device, the profile download and programming operations are performed by external servers or manufacturing equipment. The device simply receives the pre-programmed eSIM or allows remote provisioning through simplified mechanisms, removing the complexity of user interface requirements while maintaining adaptability through remote profile management.
3Reliability
If conventional SIM card is used with fixed content, then authentication is reliable, but user programmability is lost
Solution Approach 1:
The eSIM incorporates dynamic reconfigurability through its programmable memory architecture. The eSIM can be remotely provisioned with different SIM profiles, allowing the device to adapt to different network operators and services. This dynamic capability is achieved through secure remote code execution and profile download mechanisms that maintain authentication reliability while enabling user programmability. The eSIM's memory can be selectively programmed or reprogrammed through authenticated commands, combining the reliability of fixed authentication with the flexibility of programmability.
Data Source
AI summary
An apparatus includes a cellular frequency radio, either coupled to or configured to be coupled to an antenna disposed within a radio frequency (RF) shielded chamber. A cellular device includes an embedded subscriber identification module (eSIM). While the device is in the shielded chamber, a processor controls the radio to use the antenna to transmit a subscriber identification module (SIM) profile to the device and subsequently communicate with the device to test operation of the device while the device uses the SIM profile loaded into the eSIM. A cellular device includes an eSIM without a SIM profile, a cellular frequency radio, and a processor that controls the radio to wirelessly receive a SIM profile while the eSIM is still without a SIM profile, loads the received SIM profile into the eSIM, and controls the radio to wirelessly communicate with a cellular network using the SIM profile loaded into the eSIM.