Dynamic Band Selection for TA-SAR Compliance in MLO

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Solution Overview

Problem

Current wireless communication technologies, such as Wi-Fi7, face challenges in optimizing throughput and transmission range while controlling Specific Absorption Rate (SAR) in multi-link operation (MLO) due to the lack of effective dynamic band selection methods using Time Averaged Specific Absorption Rate (TA-SAR) information.

Innovation Solution

Implementing a method to dynamically allocate transmit power, duty cycle, and modulation and coding scheme (MCS) rates across multiple bands to ensure that the Time Averaged Specific Absorption Rate (TA-SAR) remains within predefined limits, thereby optimizing performance and compliance with SAR regulations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If transmit power is increased to improve transmission range and throughput, then communication performance is improved, but TA-SAR exceeds predefined safety limits

Engineering Contradiction:

ImprovethroughputVSAvoidTA-SAR

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements dynamic band selection and dynamic resource allocation that continuously adapts transmit power, duty cycle, and MCS rate based on real-time TA-SAR measurements and channel conditions. This dynamic adjustment allows the system to optimize throughput while keeping TA-SAR within safety limits by switching between different bands and adjusting transmission parameters in real-time

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes multiple transmission parameters including transmit power, duty cycle, and MCS rate to resolve the contradiction. By adjusting these parameters dynamically based on TA-SAR information and channel quality, the system achieves optimal throughput while maintaining TA-SAR compliance across different operating conditions

Inventive Principle:

Principle #35Parameter changes

2Area of stationary object

If transmit power is increased to extend transmission range, then coverage area is improved, but TA-SAR exceeds predefined safety limits

Engineering Contradiction:

Improvetransmission rangeVSAvoidTA-SAR

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The system dynamically adjusts transmission parameters including duty cycle and band selection based on real-time TA-SAR measurements. By implementing dynamic band selection across multiple bands (2.4GHz, 5GHz, 6GHz) and adjusting duty cycle dynamically, the system extends transmission range while maintaining TA-SAR within safety limits

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces band selection as an additional dimension for optimizing transmission range. By selecting different frequency bands (2.4GHz, 5GHz, 6GHz) based on TA-SAR conditions and channel characteristics, the system achieves extended coverage area while maintaining safety compliance through multi-dimensional parameter optimization

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Device complexity

If resource allocation does not consider TA-SAR information, then system complexity is reduced, but performance optimization is limited

Engineering Contradiction:

Improveresource allocation complexityVSAvoidthroughput

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent implements self-service mechanisms where the system automatically measures TA-SAR, evaluates channel conditions, and adjusts resource allocation without external intervention. The transceiver and processor work autonomously to monitor TA-SAR levels and dynamically optimize transmit power, duty cycle, and MCS rate, achieving performance optimization while managing complexity through automated decision-making

Inventive Principle:

Principle #25Self-service

4Productivity

If dynamic band selection with TA-SAR information is implemented, then throughput and transmission range are optimized, but system complexity increases

Engineering Contradiction:

ImprovethroughputVSAvoidband selection complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the wireless communication system into multiple independent bands (2.4GHz, 5GHz, 6GHz) with distinct TA-SAR characteristics. By evaluating and selecting from these segmented bands based on TA-SAR information and channel conditions, the system achieves optimized throughput while managing complexity through structured band evaluation and selection criteria

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20230397235A1Dynamic Band Selection In Multi-Link Operation With TA-SAR Information In Wireless Communications

Publication Date: 2023.12.07 MEDIATEK INC

AI summary

Techniques pertaining to dynamic band selection in multi-link operation (MLO) with time averaged specific absorption rate (TA-SAR) information in wireless communications are described. An apparatus determines a resource allocation regarding one or more multi-link operation (MLO) bands. The apparatus then allocates at least one of a transmit (TX) power, a TX duty cycle and a modulation and coding scheme (MCS) rate in wirelessly transmitting in the one or more MLO bands to result in a TA-SAR that is no greater than a predefined limit.