Multi-eSIM Selector Circuit for IoT Carrier Switching
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Solution Overview
Problem
Conventional IoT devices are limited to communicating with a single wireless network carrier due to the use of a single SIM card, which restricts their ability to automatically switch between carriers based on signal strength or environmental factors.
Innovation Solution
A communication circuit and method for an IoT device that allows operation of multiple embedded subscriber identity modules (eSIMs), enabling automatic switching between different wireless carriers based on signal strength thresholds and availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single SIM card is used in an IoT device, then the device complexity is reduced and ease of manufacture is improved, but the adaptability to different wireless carriers and automatic switching capability is limited
Solution Approach 1:
The patent combines multiple eSIMs into a single IoT device, integrating their functionality through a shared communication circuit. The selector switches between multiple eSIM data signal inputs, allowing the device to access multiple wireless carriers while maintaining a unified hardware architecture. This merging approach enables carrier adaptability without proportionally increasing overall device complexity.
Solution Approach 2:
The communication circuit is designed with universal functionality to support multiple eSIMs and wireless carriers. The selector and shared data line create a multi-functional interface that can dynamically connect to different carriers based on signal conditions, making the device adaptable to various network environments without requiring separate dedicated circuits for each carrier.
2Reliability
If multiple SIM cards are installed in an IoT device to enable carrier switching, then the adaptability and reliability are improved, but the device complexity and difficulty of operation increase
Solution Approach 1:
The IoT device automatically monitors wireless signal strength and autonomously switches between eSIMs based on pre-set thresholds. The processor executes instructions to determine when to switch carriers without user intervention, making the system self-managing. This self-service capability maintains high connectivity reliability while preserving ease of operation, as users do not need to manually configure or switch SIM cards.
Solution Approach 2:
The device implements a feedback mechanism where the processor continuously monitors signal strength metrics and automatically triggers eSIM switching when thresholds are breached. This closed-loop control ensures reliable connectivity by responding to real-time network conditions, while the automation eliminates the need for user intervention in the switching process.
3Productivity
If manual switching between SIM cards is required, then the device complexity is reduced, but the loss of time and productivity decrease due to human intervention
Solution Approach 1:
The device pre-configures multiple eSIMs and establishes their associated wireless carrier profiles during initialization. The processor monitors signal conditions continuously and is prepared to switch between pre-loaded eSIMs immediately when threshold breaches occur. This preliminary preparation eliminates delays associated with manual SIM card insertion or configuration, ensuring continuous communication and maximizing productivity.
Solution Approach 2:
The patent replaces manual mechanical SIM card switching with an automated electronic selection mechanism. The selector electronically routes data signals between multiple eSIMs based on processor control, eliminating the need for physical SIM card removal and insertion. This substitution of mechanical action with electronic control instantaneously switches carriers, preventing communication interruptions and maintaining productivity.
4Adaptability or versatility
If a selector is added to switch between eSIM data signals, then the adaptability to multiple carriers is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The communication circuit is segmented into distinct functional modules: individual eSIM interfaces, a selector component, and a shared data line. This modular segmentation allows each component to be optimized independently for manufacturing while maintaining overall system adaptability. The selector acts as a discrete switching element that can be integrated using standard PCB techniques, facilitating ease of manufacture despite the multi-carrier capability.
Data Source
AI summary
Systems and methods for allowing an Internet of Things device to circuit switch among embedded subscriber identity modules (eSIMs) are provided. A communication circuit for operating a plurality of eSIMs may include a first and second eSIM. The communication circuit may further include an eSIM card interface bus configured to provide signals to and from the eSIMs, the bus including a data line adapted to receive a data signal. The communication circuit may further include an eSIM select line configured to receive an eSIM select control signal to select between the eSIMs to communicate with a wireless network. The communication circuit may further include a selector connected to the eSIM select line, the selector adapted to switch the data signal between the first and second channel to provide the data signal to the first and second eSIMs based at least in part on the eSIM select control signal.