NFC Device Identity Selection via Polling Command Analysis
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Solution Overview
Problem
Conventional NFC devices are limited to single identities, making it cumbersome for users to manage multiple identities such as credit cards, tickets, and identifications with a single device, as they cannot efficiently select and utilize the appropriate identity in response to polling commands from NFC readers.
Innovation Solution
A Near Field Communication (NFC)-enabled device with a demodulator to extract polling commands, a memory to store multiple identities, and a processor to select the appropriate identity based on the command characteristics, allowing for the emulation of multiple identities and proper selection in response to polling commands, supporting standards like Type A, Type B, Type F, and Vicinity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single identity is associated with an NFC device, then the device complexity is reduced and operation is simpler, but the versatility and adaptability are limited
Solution Approach 1:
The patent combines multiple identity functions into a single NFC device. The device maintains a list of multiple NFC targets (identities) and can select among them based on polling commands, eliminating the need for multiple separate physical devices while providing versatile identity support.
Solution Approach 2:
The NFC device is designed to perform multiple identity functions simultaneously. It can emulate different NFC targets (electronic tickets, credit cards, identification) and automatically selects the appropriate identity based on the polling command characteristics, making a single device universal for various identity needs.
2Ease of operation
If multiple identities are stored in a single NFC device, then device portability is improved, but the difficulty of selecting the proper identity increases
Solution Approach 1:
The NFC device automatically performs identity selection without user intervention. When a polling command is received, the device's processor automatically searches the list of NFC targets, matches the command characteristics with stored identities, and selects the appropriate identity, making the selection process transparent and easy to operate.
Solution Approach 2:
The device uses the characteristics of the polling command as feedback to determine which identity to select. By analyzing the polling command's format and characteristics, the device can intelligently match and select the corresponding identity from its list, ensuring the correct identity is used for each interaction.
3Productivity
If automatic identity selection is implemented, then productivity is improved, but the device complexity increases
Solution Approach 1:
The device maintains a pre-organized list of multiple NFC targets with their characteristics stored in memory before any polling occurs. This preliminary organization allows for rapid matching and selection when a polling command is received, improving productivity while keeping the selection mechanism relatively simple through pre-computed matching criteria.
Data Source
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AI summary
An apparatus and method are disclosed for selecting a single device identity on near field communications (NFC) devices that emulate multiple identities. A first NFC device sends a polling command and a second NFC device receives the polling command. The second NFC device, which emulates multiple identities, is configured to extract any identifying characteristics from the polling command and search a list it maintains of all the emulated identities. The second NFC device is also configured to select the first emulated identity that matches the characteristics including in the polling command. A link is then established between the first NFC device and the second NFC device which emulates the target specified in the polling command.