Dual-SIM UICC Readout for Simultaneous Voice and Data in Vehicles
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Solution Overview
Problem
Current mobile radio devices in vehicles face challenges in establishing reliable simultaneous voice and data transmission due to limitations in existing mobile standards, particularly with the GSM and LTE standards, which often require multiple SIM cards and result in service-dependent coverage gaps and technical difficulties during standard transitions.
Innovation Solution
A circuit arrangement with two mobile radio modules (one for UMTS/LTE and another for GSM) and a readout device for a dual-SIM UICC card, allowing simultaneous registration and operation of both modules using identification data from a single chip card, enabling flexible standard selection and redundant communication paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate SIM cards are used for simultaneous voice and data transmission, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines two SIM card functions into a single dual-SIM UICC card. The readout device extracts identification data from both SIMs within this single card and distributes them to the first and second mobile radio modules, enabling simultaneous voice and data transmission while reducing the physical number of SIM cards from two to one.
Solution Approach 2:
The single dual-SIM UICC card serves multiple functions by containing two separate subscriber identification modules. This universal card can provide authentication credentials for both the first mobile radio module (for voice) and the second mobile radio module (for data), eliminating the need for separate SIM cards.
2Device complexity
If a single SIM card is used for both voice and data, then device complexity is reduced, but communication reliability deteriorates due to standard limitations
Solution Approach 1:
The patent segments the communication functions by assigning different mobile radio standards to different modules: the first mobile radio module handles voice transmission (using GSM/UMTS) while the second module handles data transmission (using LTE). The readout device separates and distributes identification data from the dual-SIM card to each appropriate module, enabling reliable simultaneous operation despite using a single SIM card.
3Speed
If LTE module is used for data transmission, then data speed is improved, but voice transmission capability is lost
Solution Approach 1:
The patent divides communication tasks between two specialized modules: the first mobile radio module (GSM/UMTS) is optimized for voice transmission, while the second mobile radio module (LTE) provides high-speed data transmission. The readout device enables both modules to operate simultaneously by providing them with identification data from the dual-SIM card, thus achieving both fast data and reliable voice communication.
Data Source
AI summary
The invention relates to a circuit arrangement for mobile communications unit (10) of a motor vehicle, comprising: a first mobile communications module (18) for a mobile communications transmission according to a first mobile communications standard, a second mobile communications module (20) for a mobile communications transmission according to a second mobile communications standard and a reading unit (34) for reading identification data from a chip card (36). A reliable mobile communications connection should be made possible using cost-effective circuitry-related means, both for telephony and for the transmission of other digital data by means of control devices and personal computers. For this purpose, the circuit arrangement is configured to operate the two mobile communications modules (18, 20) at the same time, and the reading unit (34) is configured for the simultaneous operation of the two mobile communications modules to receive identification data from two subscriber identification modules (38, 40) from the same chip card (36) and to transmit the identification data of a respective subscriber identification module (38, 40) to one of the two mobile communications modules (18, 20).