Contactless Chip Processing Scheduled Around Terminal Wait Times
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Solution Overview
Problem
Existing smart card technologies face challenges in implementing multiple functionalities due to power constraints and interference with terminal communication when additional functions are integrated, as they were originally designed for primary functions like payments, leading to increased power consumption and potential signal noise.
Innovation Solution
A device architecture with a chip and a module that distributes processing tasks across both components, synchronizing operations with terminal communication waiting times to manage power consumption and reduce interference, using power harvesting and management units to optimize power use and minimize noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional functions are integrated into the smart card device, then functionality and versatility are improved, but power consumption increases and terminal communication is interfered with
Solution Approach 1:
The module is configured to perform processing steps during waiting time intervals when the chip is not communicating with the terminal. This periodic scheduling allows additional functions to execute only when power is available and communication is not occurring, thus maintaining versatility while controlling power consumption.
Solution Approach 2:
The device is divided into two independent components: a chip for primary communication functions and a module for additional processing functions. This segmentation allows independent power management and scheduling of processing tasks, enabling multiple functions to coexist without excessive power consumption or interference.
2Adaptability or versatility
If additional functions are integrated into the smart card device, then functionality is improved, but noise in terminal communication increases
Solution Approach 1:
Processing steps for additional functions are scheduled to execute during waiting time intervals when the chip is not actively communicating with the terminal. This timing separation ensures that power consumption by the module does not occur during communication periods, thereby eliminating noise generation and maintaining signal quality.
Solution Approach 2:
A power management unit acts as an intermediary between the power harvesting unit and the processing components. It controls and regulates power distribution, ensuring that the module only receives power during appropriate waiting time intervals, thus preventing interference with terminal communication while enabling additional functionality.
3Productivity
If processing tasks are performed continuously, then productivity is improved, but power consumption and communication interference increase
Solution Approach 1:
Processing tasks are organized into discrete steps that are scheduled to execute during specific waiting time intervals. This periodic execution maintains productivity by utilizing all available processing windows, while simultaneously controlling power consumption by keeping the module inactive during communication periods.
Solution Approach 2:
The system maintains continuous useful action by scheduling processing steps to execute during every available waiting time interval. This ensures that productivity is maximized within the constraints of power availability, as the module is continuously utilized during permissible time windows rather than remaining idle.
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
Effectively manages power consumption and reduces interference in terminal communication by synchronizing processing tasks with waiting times, allowing for seamless integration of additional functions like biometric authentication without disrupting primary functions.
Implementation Method 1
The contactless card may include an antenna to receive an electromagnetic signal, such as an RF signal, emitted from a terminal
Implementation Method 2
One way to harvest energy from the emitted signal is to arrange the antenna as a coil that induces a voltage across its terminals by means of induction when receiving the emitted signal
Data Source
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AI summary
A device for contactless communication with a terminal, comprising: an antenna for communication with the terminal; an embedded chip configured to communicate with the terminal in accordance with a contactless transmission protocol whereby a message sent by the terminal sets a specified initial waiting time for a response from the embedded chip to maintain a connection with the terminal, the embedded chip being configured to communicate requests to the terminal to extend the waiting time for response; and a module configured to perform processing formed of a plurality of discrete operations, the module being configured to, in response to completing a subset of one or more discrete operations within a waiting time interval set by the terminal, send a first type of command to the embedded chip if the processing is not complete; wherein the embedded chip is further configured to, in response to receiving the first type of command, communicate a request to the terminal to extend the waiting time for response.