Payment Terminal Inquiry Stopping Mechanism
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Solution Overview
Problem
Existing settlement systems waste time by sequentially inquiring about all electronic value functions on an IC chip, even if some are not available, leading to unnecessary waiting periods when no response is received.
Innovation Solution
Implementing a settlement system with a payment terminal and settlement terminal that acquire and store limitation information, allowing the system to stop inquiries once the presence of specified payment means is confirmed, reducing the number of inquiries and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the settlement terminal sequentially inquires about all electronic value functions on the IC chip, then all available payment means can be detected, but the inquiry time increases due to unnecessary waiting periods
Solution Approach 1:
The payment terminal stores limitation information in advance that specifies which electronic value functions are actually available on the IC chip. This preliminary action allows the settlement terminal to use this pre-stored information to guide its inquiries, avoiding unnecessary waiting periods for non-available functions while still detecting all actually available payment means.
2Reliability
If the settlement terminal waits for a specified period of time for each inquiry, then a complete response is ensured, but useless waiting time occurs when no response is received
Solution Approach 1:
The system uses feedback from the payment terminal's limitation information to dynamically adjust the inquiry process. The settlement terminal receives feedback about which functions are actually available and modifies its waiting behavior accordingly, stopping inquiries for functions that are confirmed to be unavailable, thus eliminating useless waiting time while maintaining reliable response confirmation for available functions.
3Adaptability or versatility
If the settlement terminal inquires about all payment means without limitation information, then comprehensive payment options are explored, but the number of inquiries increases unnecessarily
Solution Approach 1:
The limitation information is extracted from the payment terminal and used by the settlement terminal to filter out non-available payment functions from the inquiry process. This extraction allows the system to maintain comprehensive payment options exploration for actually available functions while significantly reducing the total number of inquiries by eliminating unnecessary checks for unavailable functions.
Data Source
AI summary
A settlement system includes a mobile terminal including a plurality of payment means for performing the payment process, and a reader/writer including an acquisition unit that sequentially inquires to the mobile terminal about each of a plurality of acceptable payment means and accepting a payment with one payment means specified among payment means confirmed to be present by the settlement acquisition unit by using a settlement unit corresponding to the one payment means, the mobile terminal further including a storage means that stores limitation information, and the reader/writer further includes a limitation information acquisition means that acquires the limitation information stored in the storage means, and an electronic money type narrowing down unit that stops inquiries by the acquisition unit when presence of payment means limited by the limitation information acquired by the limitation information acquisition means is confirmed by the acquisition unit.