NFC Module Power Saving for Mobile Hotspot Current Reduction
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Solution Overview
Problem
Electronic devices experience high current consumption when operating as mobile hotspots due to constant reception module activity, even when there are no data packets being transmitted or received, leading to increased battery usage.
Innovation Solution
An electronic device with a near field communication module monitors its state and connection with external devices, configuring the module to enter a power saving mode when no connection or disconnection is detected for a predefined time, adjusting the sleep state duration based on packet transmission and reception states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reception module is maintained to be on to always receive data packets, search packets, and connection packets, then the mobile hotspot function can always respond to external electronic devices, but the current consumption increases significantly
Solution Approach 1:
The reception module dynamically changes its operational state based on detected activity. When packet activity is detected, the module transitions to an active state to handle communications. When no activity is detected for a predetermined time, the module transitions to a power-saving state. This dynamic state adjustment allows the system to maintain reliability when needed while reducing energy consumption during idle periods.
Solution Approach 2:
The system implements periodic monitoring of packet activity and transitions the reception module between active and power-saving states based on this periodic assessment. The module is activated periodically when activity is detected and deactivated periodically when no activity is detected for a predetermined time, creating a rhythmic on-off pattern that balances responsiveness with energy conservation.
2Use of energy by moving object
If the reception module enters power saving mode to reduce current consumption, then battery usage decreases, but the ability to receive packets from external devices may be delayed
Solution Approach 1:
The system performs preliminary monitoring of packet activity before transitioning to power-saving mode. By detecting packet activity in advance and using this information to determine when to activate or deactivate the reception module, the system ensures that the module is active before packets need to be received, thereby minimizing reception delays while still achieving power savings during truly idle periods.
Solution Approach 2:
The system continuously monitors packet activity and uses this feedback to control the operational state of the reception module. When packet activity is detected, the system receives feedback that activates the module. When no activity is detected for a predetermined time, the lack of feedback triggers deactivation. This feedback mechanism ensures the module is activated in time to handle actual communication needs while minimizing unnecessary power consumption.
Data Source
AI summary
An electronic device according to various embodiments of the present invention comprises: a near field communication module; a memory; and a processor electrically connected to the near field communication module and the memory, wherein the processor may be configured to: monitor a status of the electronic device and a connection status of at least one external electronic device to the electronic device when the electronic device operates as a wireless router through the near field communication module; set the near field communication module to enter one of a plurality of predefined operating states based at least in part on the monitoring result; and set the near field communication module to enter a power saving mode when connection or disconnection of the at least one external electronic device is not detected for a predetermined time in the set one operating state. Other various embodiments, other than the various embodiments disclosed in the present invention, are possible.