Smart Card Interface Conversion for USIM Service Execution
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Solution Overview
Problem
The increasing demand for high-capacity USIM cards requires new interface standards between terminals and smart cards to effectively execute service applications, as existing technologies lack a standardized method for interworking between terminals and high-density smart cards.
Innovation Solution
An interface system and method that enables a terminal to act as a dummy device by defining a service execution procedure within the smart card, utilizing a new interface to execute core service applications on high-density smart cards, allowing mobile carriers to provide services directly to customers without terminal manufacturer cooperation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If service applications are moved from terminal software platform to smart card, then service execution capability and memory capacity are improved, but terminal development complexity and interface standardization requirements increase
Solution Approach 1:
The patent introduces an interface conversion unit that acts as an intermediary between the terminal and the smart card. This unit translates terminal interface protocols into smart card compatible protocols, enabling service applications to execute on the smart card while maintaining compatibility with existing terminal infrastructure. The intermediary resolves the interface standardization complexity by providing a standardized translation layer.
Solution Approach 2:
The patent segments the service application execution environment into two distinct parts: the smart card contains the service application code and data storage (high-capacity memory), while the terminal provides only the interface conversion and control functions. This segmentation allows the heavy computational and storage burden to be on the smart card, while the terminal remains simple.
2Adaptability or versatility
If new interface standards are defined for terminal-smart card interworking, then service application execution on smart card is enabled, but device complexity and implementation difficulty increase
Solution Approach 1:
The interface conversion unit is designed with universal functionality that can handle multiple service application types and terminal protocols. It provides a standardized interface that works across different service applications (messaging, browsing, etc.) and different terminal implementations, reducing the need for application-specific interface definitions.
Solution Approach 2:
The interface conversion unit serves as a mediator that translates between various terminal protocols and a standardized smart card interface. This intermediary approach enables service application execution on smart cards without requiring each terminal manufacturer to implement complex custom interface standards, as the conversion unit handles the protocol translation.
3Productivity
If core service functions are implemented within smart card, then mobile carriers can provide services independently, but terminal development costs increase due to dummy terminal requirements
Solution Approach 1:
The patent extracts the core service application functionality from the terminal and places it within the smart card. This extraction enables mobile carriers to provision services directly on the smart card without requiring terminal manufacturer cooperation or customization. The terminal is reduced to a simple interface device, significantly reducing development costs.
Solution Approach 2:
The smart card becomes self-sufficient by containing the service application code and execution environment. The card can execute services independently without requiring the terminal to provide complex service management functionality. This self-service capability allows mobile carriers to deploy services directly on the smart card infrastructure.
Data Source
AI summary
The present invention provides a system and method for interfacing between a terminal and a smart card embedded within smart card, and a Universal Subscriber Identification Module (USIM), and a smart card applied to the same. That is, the execution procedure of a service application in the smart card is defined using a new interface between the terminal and the smart card by providing construction of a smart card equipped with one or more service applications, executing the special service application according to the request of the terminal, providing an output value according to the execution of the special application to the terminal, and requesting a special I/O device.