IC Card Communication Device with Dynamic Mode Switching
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Solution Overview
Problem
Conventional contactless IC card communication protocols are not suitable for high-speed transfer of large data and lack a mechanism for the IC card to notify the information processing terminal of received data, leading to synchronization issues and difficulties in transmitting data effectively.
Innovation Solution
A data communication system that manages communication states between a card reading/writing device and an information processing terminal through a contactless interface, allowing direct data transfer between the IC card function unit and the terminal only in a defined data transfer state, and utilizing an Ad-hoc communication mode for increased transfer speed and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional contactless IC card communication protocols are used, then communication between card reading/writing device and IC card can be established, but high-speed transfer of large data is not suitable and synchronization issues occur
Solution Approach 1:
The system dynamically switches between two communication modes: conventional contactless IC card communication mode for small data transfers, and direct data transfer mode for large data transfers. The control unit determines the appropriate mode based on data size requirements, enabling the system to adapt its communication characteristics to match the specific transfer needs, thereby achieving both high speed and reliability when appropriate.
Solution Approach 2:
The control unit acts as an intermediary that manages the communication path between the card reading/writing device and the information processing terminal. It can route data through the conventional IC card interface or establish a direct transfer path, mediating between the two endpoints to optimize communication based on the specific requirements of each data transfer operation.
2Ease of operation
If conventional IC card communication mode is used, then communication can be established, but the IC card cannot notify the terminal of received data leading to synchronization issues
Solution Approach 1:
In the direct data transfer mode, the system implements a feedback mechanism where the control unit monitors the transfer status and can notify the information processing terminal when data has been successfully received. This feedback loop ensures that both parties are synchronized regarding the transfer status, eliminating the synchronization issues present in conventional mode while maintaining operational simplicity through automated status tracking.
3Productivity
If direct data transfer mode is used, then high-speed transfer of large data is achieved, but device complexity increases due to multiple communication modes
Solution Approach 1:
The communication system is segmented into distinct operational modes managed by the control unit. The first communication means handles conventional IC card communication for small data, while the second communication means handles direct high-speed transfer for large data. This segmentation allows each subsystem to be optimized for its specific function while the control unit coordinates between them, managing complexity through clear functional separation rather than a monolithic complex system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables secure and high-speed transfer of large amounts of data by synchronizing data transfer operations and increasing transfer speed, while maintaining high reliability through the use of a contactless and wired interface combination.
Implementation Method 1
capable of communicating with the IC card function execution unit through a contactless interface
Data Source
AI summary
A communication device includes an analog unit that processes an analog signal received from an antenna unit which performs a contactless communication with an external device. The communication device also includes a wired interface that connects to an information processing terminal through a wire. In addition, the communication device includes a digital control unit that manages a communication mode set between the external device and the information processing terminal and controls a communication path between the external device and the information processing terminal according to a present communication mode.