Multi-Radio Transmission Power Control Under SAR Thresholds

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Solution Overview

Problem

Existing communication devices face challenges in managing electromagnetic radiation exposure, particularly in relation to Specific Absorption Rate (SAR), as they often exceed safety thresholds, posing risks to human health.

Innovation Solution

The device incorporates first and second communication circuitry to manage output power levels based on different communication protocols, ensuring the sum of output power values from both does not exceed a preset threshold, with mechanisms to adjust power levels based on SAR distribution and event detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If communication devices transmit electromagnetic waves to communicate data with base stations, then communication performance is improved, but electromagnetic radiation exposure increases and may harm human body

Engineering Contradiction:

Improvecommunication performanceVSAvoidelectromagnetic radiation exposure

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements dynamic transmission power control by continuously monitoring SAR values and adjusting output power levels in real-time. The communication device dynamically modifies transmission parameters based on detected SAR distribution, ensuring communication performance is maintained while keeping electromagnetic radiation exposure within safe limits.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes physical parameters of electromagnetic radiation by controlling transmission power levels and adjusting communication protocols. By modifying output power values and selecting different communication schemes, the device optimizes the balance between communication effectiveness and SAR exposure.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If multiple communication circuitries operate simultaneously to support different communication protocols, then communication versatility is improved, but total output power may exceed SAR thresholds

Engineering Contradiction:

Improvecommunication protocol supportVSAvoidtotal electromagnetic radiation

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent merges the power control functions of multiple communication circuitries under a unified SAR management system. The processor coordinates transmission power across different communication protocols (first and second communication schemes), ensuring that the combined output power of all circuitries remains within SAR thresholds while maintaining support for multiple communication standards.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements a feedback mechanism where the processor continuously monitors the total output power of multiple communication circuitries and adjusts individual power levels based on SAR calculations. This closed-loop control ensures that communication versatility is maintained while preventing excessive electromagnetic radiation exposure.

Inventive Principle:

Principle #23Feedback

3Reliability

If transmission power is increased to maintain communication quality, then communication reliability is improved, but SAR values exceed safety thresholds

Engineering Contradiction:

Improvecommunication qualityVSAvoidSAR exposure

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes transmission parameters such as power levels, modulation schemes, and communication protocols to maintain communication reliability while controlling SAR exposure. By dynamically adjusting these parameters based on detected SAR values, the device ensures communication quality without exceeding safety thresholds.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamic adaptation of communication parameters in response to SAR measurements. When SAR values approach thresholds, the system dynamically modifies transmission power and selects alternative communication schemes, maintaining communication reliability through real-time parameter optimization.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentEP4654485A1Electronic device for controlling transmission power on basis of SAR, and operation method thereof

Publication Date: 2025.11.26 SAMSUNG ELECTRONICS CO LTD

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AI summary

According to one embodiment, a communication device comprises: a memory for storing one or more computer programs; a first communication circuit configured to perform first wireless communication based on a first communication protocol, with a first external device; a second communication circuit configured to perform second wireless communication, based on a second protocol different from the first protocol, with a second external device; and one or more application processors communicatively connected to the first communication circuit, the second communication circuit, and the memory, wherein the one or more computer programs store computer-executable instructions, and the instructions, when executed by the one or more application processors, causes the communication device to control the first communication circuit and the second communication circuit so that the sum of a first output power value output by the first communication circuit during a predetermined time range and a second output power value output by the second communication circuit during the predetermined time range does not exceed a preset total threshold value.