Dual-SIM Interface Sharing Through Modem and Reset Line Control
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Solution Overview
Problem
Current wireless communication electronic devices with multiple subscriber identification modules (SIMs) face complexity and cost increases due to the integration of multiple circuits.
Innovation Solution
The electronic device incorporates a modulator-demodulator circuit connected to multiple integrated circuits, where data transmit-receive terminals of the circuits are connected to a single data transmit-receive terminal of the modulator-demodulator circuit, and a reset terminal of one circuit is connected to a terminal of another circuit to enable signal deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple integrated circuits implementing subscriber identification modules are integrated into a wireless communication device, then extended wireless communication functionalities are enabled, but device complexity and cost increase
Solution Approach 1:
The patent connects multiple integrated circuits (first circuit implementing SIM, second circuit implementing another SIM) to a single shared data transmit-receive terminal of the modulator-demodulator circuit. This merging approach allows multiple SIMs to share common communication infrastructure (data terminal, power supply terminal, sequencing terminal), thereby enabling extended wireless communication functionalities while reducing the number of separate connection paths and lowering overall device complexity
Solution Approach 2:
The modulator-demodulator circuit's data transmit-receive terminal is designed to serve multiple integrated circuits simultaneously. This universal interface allows the same terminal to handle data communication for both the first and second subscriber identification modules, eliminating the need for separate dedicated data terminals for each SIM and thus reducing device complexity while maintaining multi-SIM functionality
2Adaptability or versatility
If multiple integrated circuits implementing subscriber identification modules are integrated into a wireless communication device, then extended wireless communication functionalities are enabled, but cost increases
Solution Approach 1:
By merging multiple integrated circuits into a shared communication architecture where they共用 (share) common terminals (data, power, sequencing) of the modulator-demodulator circuit, the patent reduces the total number of required connection components and simplifies the manufacturing process. This shared infrastructure approach lowers production costs while maintaining the ability to support multiple SIMs for extended wireless communication functionalities
3Reliability
If data transmit-receive terminals of multiple circuits are connected to separate terminals of the modulator-demodulator circuit, then each circuit has dedicated communication path, but device complexity increases
Solution Approach 1:
The patent combines multiple data transmit-receive terminals into a single shared terminal connection. Instead of providing separate dedicated data terminals for each integrated circuit, the invention merges them into one common data transmit-receive terminal of the modulator-demodulator circuit, reducing the number of connection points and simplifying the overall device architecture while maintaining reliable communication through proper signal management
Data Source
AI summary
An electronic device includes a modulator-demodulator circuit, a first integrated circuit for implementing a first subscriber module; and a second integrated circuit for implementing a second subscriber identification module. A data transmit-receive terminal of the first integrated circuit and a data transmit-receive terminal of the second integrated circuit are connected to a data transmit-receive terminal of the modulator-demodulator circuit. Reset terminals of the modulator-demodulator circuit and the first integrated circuit are connected so that the modulator-demodulator circuit can control deactivation of the first integrated circuit. A reset terminal of the second integrated circuit and an input/output terminal of the first integrated circuit are connected so that the first integrated circuit can control deactivation of the second integrated circuit. Select terminals of the modulator-demodulator circuit and the first integrated circuit are connected so that the modulator-demodulator circuit can control selection functions for controlling selection of the second integrated circuit.