ATM Host Device Interrupt Communication Reducing USB Traffic
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Solution Overview
Problem
Automated teller machines (ATMs) experience high USB traffic and increased communication failures due to frequent sensor polling, which applies a significant load on communication hardware chips, leading to manufacturing cost increases and frequent communication breakdowns.
Innovation Solution
Implementing a hybrid interrupt communication scheme where devices transmit an interrupt signal only when sensor values change, allowing the host to store and reuse sensor information, reducing unnecessary signal transmissions and traffic on USB communication lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor polling is performed frequently to check device state in real-time, then communication reliability is improved, but USB traffic load increases and communication failures occur more frequently
Solution Approach 1:
The patent implements periodic sensor polling at predetermined intervals instead of continuous monitoring. The host controller periodically transmits sensor polling commands to the sensor device and receives sensor values only at these intervals, reducing the frequency of USB communications while maintaining adequate real-time monitoring capability.
Solution Approach 2:
The patent extracts and processes only the essential sensor information needed for ATM operation. By focusing on specific sensor values rather than continuously transmitting all possible device data, the communication load is reduced while maintaining the necessary monitoring functionality.
2Productivity
If high-advanced-technology communication H/W chip is used to handle high USB traffic, then communication capacity is improved, but manufacturing cost increases
Solution Approach 1:
The patent changes the communication parameters by reducing the polling frequency and optimizing the data transmission intervals. This allows the use of lower-specification, more cost-effective communication hardware chips that can handle the reduced traffic load, while still maintaining adequate communication capacity for ATM operations.
3Speed
If sensor polling is performed repeatedly at short time intervals, then real-time device state monitoring is improved, but communication failure frequency increases
Solution Approach 1:
The patent implements periodic sensor polling at predetermined intervals instead of continuous monitoring. The host controller periodically transmits sensor polling commands to the sensor device and receives sensor values only at these intervals, reducing the frequency of USB communications while maintaining adequate real-time monitoring capability.
Data Source
AI summary
A method of communication between a host of an automated teller machine and a device. The process is performed as a result of sensor polling which the host periodically performs to check a state of a device. The process is simplified by employing an interrupt communication scheme in which an interrupt signal for notifying that a change of a sensor value occurs in the device is transmitted from a device to a host. This simplification reduces USB traffic that occurs during a process of communication between the host of the automated teller machine and the device, thereby reducing a load that is applied to a communication hardware chip of the automated teller machine. As a result, the frequency with which a communication failure occurs is decreased, thereby achieving the effect of providing support for seamless communication.