Temperature-Based Transmit Power Adjustment for IoT Connections
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Solution Overview
Problem
Existing IoT devices face performance issues due to improper transmit power settings, which can cause interference or unstable connections at varying temperatures, without a mechanism for automatic adjustment.
Innovation Solution
A method and system for automatically adjusting transmit power levels based on temperature changes by performing power calibration, measuring device temperature, determining offset relationships, and updating power indexes to maintain optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit power is set high, then coverage and connection stability are improved, but interference with neighboring wireless networks increases
Solution Approach 1:
The patent implements dynamic transmit power adjustment by continuously monitoring temperature changes and automatically modifying power levels accordingly. The system transitions from static power configuration to dynamic adaptation, using temperature as the triggering parameter to adjust power index and maintain optimal performance across varying thermal conditions
Solution Approach 2:
The patent changes the power index parameter based on temperature variations. By storing multiple power index values corresponding to different temperature ranges and selecting the appropriate index based on current temperature, the system adapts transmit power to maintain connection stability while preventing excessive interference
2Object-generated harmful factors
If transmit power is set low, then interference with neighboring networks is reduced, but connection stability and throughput deteriorate
Solution Approach 1:
The system dynamically adjusts transmit power based on real-time temperature monitoring. When temperature increases indicating potential performance degradation, the system automatically increases power index to maintain connection stability, reversing the traditional static low-power approach
Solution Approach 2:
The patent implements a feedback mechanism where temperature sensors continuously monitor device thermal state and feed this information back to the power management system. This closed-loop control enables automatic power index adjustment to maintain optimal connection stability while adapting to thermal conditions
3Measurement precision
If manual power calibration is performed, then initial power settings are optimized, but additional calibration is required when temperature changes
Solution Approach 1:
The patent performs preliminary power calibration at a reference temperature during device initialization or manufacturing. The calibrated power index values for different temperature ranges are stored in memory, eliminating the need for repeated calibration procedures when temperature changes occur during operation
Solution Approach 2:
The system pre-compensates for temperature-induced performance variations by storing multiple power index values corresponding to different temperature ranges. When temperature changes occur, the system simply retrieves the pre-calculated appropriate power index rather than requiring recalibration, cushioning against future performance degradation
Data Source
AI summary
The present disclosure provides a system and a method to adjust a transmit power level of a device at different temperatures. The method includes performing a power calibration to determine a preliminary power index; measuring a temperature of the device; obtaining an offset relationship as a function of temperature; determining a target offset value of the device according to the measured temperature and the offset relationship; determining an updated power index based on the preliminary power index and the target offset value; obtaining a transmit power relationship as a function of power index; determining a target transmit power level of the device according to the updated power index and the transmit power relationship; and transmitting data at the target transmit power level.