Energy Management Interface for Dynamic Wireless Power Control
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Solution Overview
Problem
Conventional communication devices face challenges in dynamically controlling transmission power to comply with FCC regulations regarding human proximity, often resulting in performance compromises due to the need for multiple SAR sensors and static power limit tables, which do not facilitate efficient collaboration among wireless communication circuits.
Innovation Solution
The implementation of a virtual ACPI device within an energy management interface that receives power control events and notifies wireless communication circuits to dynamically adjust transmission power, allowing for platform-independent and OS-agnostic power management, thereby avoiding dedicated hardware routing and enabling collaboration among circuits for interference mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SAR sensors are used for each wireless communication circuit to detect human proximity, then regulatory compliance is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the human proximity detection function from multiple dedicated SAR sensors into a single shared SAR sensor that serves all wireless communication circuits. This consolidation reduces device complexity while maintaining regulatory compliance through centralized proximity detection and coordinated power control across all circuits.
Solution Approach 2:
The patent implements a universal energy management interface that handles power control for multiple wireless communication circuits through a single SAR sensor. This interface acts as a mediator that receives proximity signals once and distributes appropriate power control commands to all circuits, making the system more efficient and less complex.
2Reliability
If static transmit power limit data is stored in device memory for each frequency band, then regulatory compliance is achieved, but performance and throughput are reduced
Solution Approach 1:
The patent transitions from static transmit power limits stored in memory to dynamic power control based on real-time proximity detection. The energy management interface continuously monitors SAR sensor data and dynamically adjusts transmit power for each wireless circuit based on actual human proximity conditions, allowing maximum throughput when safe and compliance when needed.
Solution Approach 2:
The patent implements a feedback loop where the SAR sensor continuously monitors proximity conditions and feeds this information to the energy management interface, which then adjusts transmit power accordingly. This closed-loop control ensures regulatory compliance while optimizing performance by only reducing power when actually necessary.
3Reliability
If wireless devices operate at low power to pass regulations for close proximity use, then regulatory compliance is improved, but performance, range and throughput are reduced
Solution Approach 1:
The patent enables dynamic adjustment of transmit power based on real-time proximity detection rather than operating at fixed low power. When the SAR sensor detects no human proximity, the energy management interface allows wireless circuits to operate at full power for optimal performance. When proximity is detected, power is reduced only for affected circuits, maintaining compliance without permanent performance degradation.
4Measurement precision
If dedicated SAR sensors are used for each wireless communication circuit, then proximity detection accuracy is improved, but the ability for circuits to collaborate for efficiency is lost
Solution Approach 1:
The patent introduces an energy management interface as an intermediary between the single SAR sensor and multiple wireless communication circuits. This interface receives proximity signals from the SAR sensor and coordinates power control decisions across all circuits, enabling collaboration and efficient resource management while maintaining accurate proximity detection through the centralized sensor.
Data Source
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AI summary
A communication device is provided. The communication device may include at least one wireless communication circuit, an energy management interface coupled to the at least one wireless communication circuit, an operating system executed on the communication device, and a human proximity determination circuit configured to generate a human proximity signal upon detecting proximity of a human body part and to send the human proximity signal to the operating system. The energy management interface is configured to receive the human proximity signal from the operating system, and to notify the at least one wireless communication circuit based on the received human proximity signal.