NFC Terminal Processor Wake-Up for Power-Off Service Processing
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Solution Overview
Problem
Existing NFC terminals cannot process NFC services when powered off, as integrated inSE or HCE applications are unable to function in a power-off state, limiting their functionality in scenarios like card simulations and payments.
Innovation Solution
The method involves receiving an application selection instruction from a second terminal, which triggers the powering on of the main processor, allowing the SE or HCE application to process NFC services even when the terminal is initially powered off. This is achieved by determining the battery level and using appropriate power-on sequences to wake up only necessary modules, ensuring the SE or HCE application can operate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal is powered off to save energy, then energy consumption is reduced, but NFC service processing capability is lost
Solution Approach 1:
The system segments the terminal into different operational states: full power mode, NFC-only mode (processor powered off but NFC chip active), and complete power off mode. This allows selective activation of components based on service requirements, enabling NFC processing while conserving energy by keeping only essential components active.
Solution Approach 2:
The system dynamically adjusts the operational state of the processor based on incoming NFC service requests. When an NFC service is detected, the processor is woken from power-off state to handle the service, then returns to power-off state after processing. This dynamic state transition optimizes energy consumption while maintaining NFC service capability.
2Adaptability or versatility
If the processor is kept powered on to process NFC services, then NFC service processing capability is maintained, but energy consumption increases
Solution Approach 1:
Instead of continuous processor operation, the system uses periodic activation where the processor is powered on only when NFC services are detected and powered off between services. This periodic action pattern maintains service capability while significantly reducing overall energy consumption compared to continuous operation.
Solution Approach 2:
The NFC chip is designed to autonomously detect incoming NFC service requests and independently trigger processor activation without requiring continuous processor monitoring. This self-service mechanism allows the system to maintain NFC capability with minimal processor involvement, reducing energy consumption while preserving service functionality.
3Use of energy by moving object
If the processor is powered off, then energy consumption is reduced, but response time for NFC services increases due to power-on delay
Solution Approach 1:
The processor enters a low-power state rather than complete power-off, maintaining a ready-to-activate condition. When NFC services are detected, the processor can transition to full power state quickly without requiring a cold boot sequence, thus reducing response time while still achieving significant energy savings compared to full power operation.
Data Source
AI summary
A method is applied to a first terminal, the first terminal includes a main processor and an NFC chip, and a first SE is integrated into and/or an HCE application is run on the main processor. The method includes: when the main processor of the first terminal is powered off, receiving, by the first terminal, an application selection instruction sent by a second terminal, where the application selection instruction is used to instruct to process an NFC service by using an application in the first SE or the HCE application; and after receiving the application selection instruction, controlling, by the first terminal, the main processor to be powered on, and routing the application selection instruction to the main processor, so that the main processor processes the NFC service.