NFC Card-Mode Exit on RF Content Detection for Faster Transactions
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Solution Overview
Problem
The use of an observer mode in NFC communication between electronic devices can slow down the communication process, leading to delays in completing NFC transactions.
Innovation Solution
An electronic device in card mode exits the observer mode upon detection of a specific content in a received radio frequency field, allowing it to respond directly to commands without analyzing all protocols, thereby reducing the need for application processor intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the device operates in observer mode to detect all protocols, then protocol detection capability is improved, but communication speed deteriorates
Solution Approach 1:
The patent extracts only the necessary protocol detection capability from the full observer mode. Instead of detecting all protocols, the system selectively exits observer mode only when a supported protocol is detected, removing unnecessary protocol analysis steps that slow down communication.
Solution Approach 2:
The system performs preliminary protocol detection in observer mode, then takes preliminary action to exit this mode once a supported protocol is identified. This preliminary detection followed by selective exit avoids the time penalty of complete protocol analysis while ensuring compatibility.
2Adaptability or versatility
If the device analyzes all polling frames in observer mode, then protocol compatibility is improved, but transaction completion time deteriorates
Solution Approach 1:
The patent extracts only the essential protocol compatibility checking from complete polling frame analysis. The system checks for supported protocols in a streamlined manner and exits observer mode promptly, removing unnecessary analysis of incompatible protocols that waste time.
Solution Approach 2:
The system skips detailed analysis of polling frames from unsupported protocols. Once a supported protocol is detected, the system rushes through the transaction by exiting observer mode immediately, avoiding time-consuming analysis of frames from incompatible protocols.
3Measurement precision
If the application processor intervenes to manage observer mode, then control precision is improved, but processing overhead increases
Solution Approach 1:
The NFC controller performs self-service by autonomously detecting supported protocols and managing observer mode transitions. This reduces application processor intervention to essential control decisions, lowering processing overhead while maintaining precise control through the controller's built-in capabilities.
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
This approach saves time in completing NFC communications by avoiding the need to analyze polling frames, enhancing communication speed and maintaining backward compatibility with existing devices.
Implementation Method 1
a first device in card mode, comprising an NFC controller, and a second device in reader mode, wherein said first device exits an observer mode upon reception by said NFC controller of a content of a captured sequence of a radio frequency field
Data Source
AI summary
A first device operates in card mode and includes an NFC controller. A second device operates in reader mode. In an NFC communication method, the first device exits an observer mode on reception by the NFC controller of content of a captured sequence of a radio frequency field.