Dynamic Power Reduction Modes for Wireless Devices
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Solution Overview
Problem
Wireless computing devices face challenges in managing Specific Absorption Rate (SAR) limits, as SAR levels can vary with device orientation and user proximity, necessitating dynamic power reduction of radio frequency (RF) power to ensure user safety without compromising functionality.
Innovation Solution
The computing device switches between user and IoT modes based on power states and user interactions, using a dynamic power reduction (DPR) table to adjust RF power levels, ensuring acceptable SAR levels by activating or deactivating dynamic power reduction modes associated with different SIM accounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dynamic power reduction is applied to mitigate SAR risk, then user safety is improved, but device performance and functionality are degraded
Solution Approach 1:
The system dynamically adjusts RF power levels based on real-time detection of device orientation and user proximity. The radio frequency module operates at full power when safe, and reduces power only when SAR risk is detected, allowing the device to maintain optimal performance while mitigating harm when necessary
Solution Approach 2:
The system changes the power parameter of RF transmissions based on detected conditions. By monitoring device orientation and user proximity, the system adjusts transmission power levels to maintain safety while preserving performance when conditions allow
2Object-affected harmful factors
If RF power is reduced to ensure user safety, then SAR risk is mitigated, but communication quality and data transmission efficiency are degraded
Solution Approach 1:
The system dynamically adjusts RF power levels based on real-time detection of device orientation and user proximity. The radio frequency module operates at full power when safe, and reduces power only when SAR risk is detected, allowing the device to maintain optimal performance while mitigating harm when necessary
Solution Approach 2:
The system uses sensors to continuously monitor device orientation and user proximity, feeding this information back to the RF power control mechanism. This feedback loop ensures power adjustments are made only when safety conditions require them, maintaining communication quality when safe
3Object-affected harmful factors
If the device operates in user mode with SAR mitigation, then user safety is prioritized, but IoT device functionality and power efficiency are compromised
Solution Approach 1:
The system segments operation into distinct modes: user mode with SAR mitigation when a user account is active, and IoT mode without SAR constraints when only IoT accounts are active. This segmentation allows the device to optimize for either safety or functionality depending on the operational context
Solution Approach 2:
The device is designed to handle both user interactions and IoT operations through the same RF infrastructure. By detecting the presence of user accounts versus only IoT accounts, the system universally applies appropriate power management strategies for each operational context
Data Source
AI summary
In some examples, the disclosure describes a device, comprising: a processor, and a non-transitory memory resource storing machine-readable instructions stored thereon that, when executed, cause the processor to: activate a dynamic power reduction mode for a device in response to identifying the device is in a first power state associated with a first account, and deactivate the dynamic power reduction mode for the device in response to identifying the device is in a second power state associated with a second account.