SIM Card Chipset for Mobile Wallet Dual Interface
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Solution Overview
Problem
Existing mobile wallet solutions for SIM cards face challenges due to high entry costs, limited memory capacity, and the inability of dual interface IC chips to operate both contact and contactless ports simultaneously, which are essential for mobile wallet functionality in SIM sockets of mobile phones.
Innovation Solution
A chipset is designed for a mobile wallet system implemented in a SIM card, featuring a wallet module with a contactless interface, a controller module, and enhanced memory capacity, allowing simultaneous operation of contact and contactless ports, and powered through both the SIM socket and RFID antenna, enabling cost-effective and efficient mobile wallet functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual interface IC chips are used to provide both contact and contactless ports, then mobile wallet functionality is enabled, but the chips cannot operate both ports simultaneously which is required for mobile wallet in SIM sockets
Solution Approach 1:
The system is divided into two separate IC chips: a first IC chip handling contact interface operations and a second IC chip handling contactless interface operations. This segmentation allows each chip to be optimized for its specific interface type while enabling simultaneous operation of both contact and contactless ports through independent processing paths.
2Quantity of substance
If conventional dual interface IC chips are used, then contactless functionality is provided, but they are limited to low speed CPU and small non-volatile memory due to low power limits
Solution Approach 1:
The system separates power-constrained contactless operations (second IC chip) from power-unconstrained contact operations (first IC chip). This allows the first IC chip to provide high-speed CPU and large non-volatile memory capacity without being limited by the low power available through the contactless interface, while the second IC chip handles only the power-sensitive contactless radio frequency operations.
3Adaptability or versatility
If mobile wallet functions are implemented on a new phone with NFC chip, then contactless wallet functionality is achieved, but entry cost becomes very high
Solution Approach 1:
The system enables existing SIM cards to serve multiple functions by integrating both contact and contactless interface capabilities through two IC chips. This allows the SIM card to function as both a traditional subscriber identity module and a mobile wallet device, eliminating the need for separate NFC phones or dedicated wallet devices and significantly reducing entry cost for users.
4Ease of manufacture
If SIM card is used for mobile wallet, then cost effectiveness is improved, but existing SIM cards lack the necessary contactless interface and dual interface capability
Solution Approach 1:
The system merges contactless interface functionality into the existing SIM card structure by adding a second IC chip with contactless capabilities alongside the first IC chip that handles contact operations. This combination transforms the traditional SIM card into a dual-interface mobile wallet device, maintaining cost effectiveness while gaining contactless functionality.
Data Source
AI summary
The invention presents a chipset for a mobile wallet system in a communication terminal having a SIM socket and a RFID antenna. The chipset includes a wallet module and a controller module. The wallet module has a contactless interface port coupled to the RFID antenna and a wallet memory for storing wallet applications. The controller module, connected to the SIM socket of the communication terminal, has a controller memory stored with SIM function software, mobile wallet application software and software to control the wallet module. The controller module is powered through the SIM socket, and the wallet module is powered through the SIM socket and the RFID antenna.