IC Card Data Segmentation for Error Detection
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Solution Overview
Problem
Conventional IC card systems face inefficiencies in data transmission and processing due to the need for retransmitting large data when communication errors occur, leading to prolonged communication and processing times.
Innovation Solution
The IC card system divides large data into smaller portions, applies error detection codes, and retransmits only the affected portions, using a communication protocol that modulates the carrier wave to indicate errors, allowing efficient data transmission and reception even with large data sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the IC card gives the EDC to the whole message and repeats retransmitting until confirmation, then communication error detection is achieved, but communication time and processing time become long when data size is large
Solution Approach 1:
The patent divides large data into multiple small data portions before transmission. Each portion is transmitted separately with its own error detection code. This segmentation allows only the erroneous portions to be retransmitted rather than the entire large data set, significantly reducing retransmission time and improving communication efficiency while maintaining error detection reliability.
2Reliability
If the IC card gives the EDC to the whole message and repeats retransmitting until confirmation, then communication error detection is achieved, but processing time becomes long when data size is large
Solution Approach 1:
By segmenting large data into smaller portions, the patent reduces the processing burden on both the IC card and external device. Each smaller portion can be processed independently and faster, and error detection is performed on individual portions rather than the entire large message, thereby reducing overall processing time while maintaining detection reliability.
3Reliability
If large data is retransmitted when communication error occurs, then error correction is achieved, but communication efficiency decreases
Solution Approach 1:
The patent segments large data into smaller portions for transmission. When an error occurs, only the specific erroneous portion needs to be retransmitted rather than the entire large data set. This approach maintains error correction capability while significantly improving communication efficiency by minimizing redundant retransmission of error-free data portions.
Solution Approach 2:
The patent extracts and transmits error detection codes with each data portion separately. This allows the receiving device to identify and extract only the erroneous portions for retransmission, rather than retransmitting the complete original message. This extraction approach maintains reliability while improving productivity by reducing unnecessary data transmission.
Data Source
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AI summary
According to an embodiment, an IC card includes a communication section and a control section. The control section divides data which is transmitted to the external device. Moreover, the control section transmits a divided data portion to which an error detection code is given, to the external device through the communication section intermittently so as to make a predetermined non-transmission period. Moreover, the control section detects an error notice showing a failure in receiving divided data from the external device in the predetermined period. Furthermore, the control section retransmits the divided data portion to which the error detection code is given transmitted last after detecting the error notice.