Inter-band Carrier Aggregation Power Prioritization

Solution Overview

Problem

Existing wireless communication systems face challenges in managing electromagnetic power density exposure levels to ensure compliance with maximum permissible exposure (MPE) limits, particularly in inter-band carrier aggregation scenarios.

Innovation Solution

A method and apparatus for a user equipment (UE) to determine a measured configured maximum UE output power (PUMAX) and prioritize aspects of UE transmissions. This involves determining a priority order for power management maximum power reduction (P-MPR) of each component carrier, reducing transmitter output power accordingly, and adjusting power levels to maintain electromagnetic power density exposure within MPE limits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If transmitter output power is reduced to comply with MPE limits, then electromagnetic power density exposure level decreases, but transmission quality and coverage deteriorate

Engineering Contradiction:

Improveelectromagnetic power density exposure levelVSAvoidtransmission quality

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent segments the total transmission power across multiple component carriers in inter-band carrier aggregation. By dividing power management into individual carrier levels with separate P-MPR adjustments, the system can selectively reduce power on specific carriers while maintaining or minimizing impact on overall transmission quality and coverage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by implementing carrier-specific power management where each component carrier can have differentiated P-MPR values. This allows targeted power reduction on carriers contributing most to MPE exposure while preserving power on carriers critical for maintaining transmission quality and coverage.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If power management maximum power reduction (P-MPR) is increased to reduce transmitter output power, then MPE compliance improves, but available transmission power decreases

Engineering Contradiction:

ImproveMPE complianceVSAvoidavailable transmission power

Core Design Contradiction:

Object-affected harmful factorsVSPower

Solution Approach 1:

The patent implements dynamic power management where P-MPR values are adjusted in real-time based on MPE exposure assessments. The system continuously monitors electromagnetic power density exposure levels and dynamically modifies P-MPR settings across component carriers to maintain MPE compliance while maximizing available transmission power under current conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes power management parameters by introducing carrier-specific P-MPR adjustments instead of uniform power reduction. By modifying power distribution parameters across multiple carriers with different priority weights, the system achieves MPE compliance while preserving more total transmission power compared to blanket power reduction approaches.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If uniform power reduction is applied across all carriers, then MPE compliance is achieved, but transmission efficiency and service quality deteriorate significantly

Engineering Contradiction:

ImproveMPE complianceVSAvoidtransmission efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent applies local quality by implementing carrier-specific power management where each component carrier can have differentiated P-MPR values. This allows targeted power reduction on carriers contributing most to MPE exposure while preserving power on carriers critical for maintaining transmission quality and coverage.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes power management parameters by introducing carrier-specific P-MPR adjustments instead of uniform power reduction. By modifying power distribution parameters across multiple carriers with different priority weights, the system achieves MPE compliance while preserving more total transmission power compared to blanket power reduction approaches.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12219501B2Transmit power prioritization in inter-band carrier aggregation

Publication Date: 2025.02.04 QUALCOMM INC

AI summary

Aspects of the disclosure relate to inter-band carrier aggregation. A user equipment (UE), for example, may obtain a measured configured maximum UE output power (PUMAX) and prioritize aspects of UE transmissions that contribute to PUMAX. Prioritization may be based, for example, on band priority, channel priority, service priority, or any combination thereof. The power levels related to the prioritized features may be changed by changing a power management maximum power reduction (P-MPR) of each feature associated with the transmission according to the prioritized order of the features. The UE may determine if an electromagnetic power density exposure level of the UE is at or below a predetermined maximum permissible exposure (MPE) level. The UE may continue to reduce the transmitter output power if the electromagnetic power density exposure level is greater than the predetermined MPE level. Other aspects, embodiments, and features are also claimed and described.