Linear MPR Equations Across Wireless Channel-Bandwidth Groups

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication technologies face challenges in defining maximum power reduction (MPR) values for user equipment (UE) in different bandwidth groups, particularly for NR bands other than band n14, leading to inconsistent and excessive power back-off, which affects UL coverage.

Innovation Solution

Implementing separate MPR equations for channel bandwidth groups (<50 MHz and ≥50 MHz) to define MPR values based on channel bandwidth, ensuring optimal power reduction by considering the guard-to-subcarrier spacing ratio and linear spectral regrowth.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single maximum power reduction value is used for all channel bandwidths, then device complexity is reduced, but manufacturing precision deteriorates due to inconsistent power management across different bandwidth groups

Engineering Contradiction:

Improvepower management complexityVSAvoidpower reduction accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by introducing different maximum power reduction equations for different channel bandwidth groups. For bandwidths less than 50 MHz, one equation is used, while for bandwidths of 50 MHz or more, a different equation is applied. This allows the power reduction parameter to be optimized for each bandwidth group, improving power management accuracy without requiring a completely complex new system.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements local quality by tailoring the maximum power reduction characteristics to specific channel bandwidth groups. Each bandwidth group (<50 MHz and ≥50 MHz) receives customized power reduction treatment through dedicated equations, ensuring that power management is locally optimized for each operating condition rather than applying a uniform approach globally.

Inventive Principle:

Principle #3Local quality

2Object-generated harmful factors

If maximum power reduction is increased for higher bandwidths, then harmful emissions are reduced, but power loss increases affecting UL coverage

Engineering Contradiction:

Improvespectral emissionsVSAvoidtransmit power

Core Design Contradiction:

Object-generated harmful factorsVSLoss of energy

Solution Approach 1:

The patent changes the power reduction parameter based on channel bandwidth by implementing separate equations for different bandwidth groups. For bandwidths less than 50 MHz, a lower power reduction is applied, while for bandwidths of 50 MHz or more, a higher power reduction is implemented. This parameter adaptation ensures that power reduction is proportional to bandwidth, effectively managing spectral emissions while minimizing unnecessary power loss in lower bandwidth scenarios.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12464478B2Apparatus and method using different optimum maximum power reduction values linearly dependent on different bandwidth groups

Publication Date: 2025.11.04 NOKIA TECHNOLOGIES OY

AI summary

An apparatus including at least one processor; and at least one memory storing instructions that, when executed with the at least one processor, cause the apparatus to: determine a channel bandwidth; and based upon the determined channel bandwidth, determine a maximum power reduction for the channel bandwidth using a value of the channel bandwidth as a value in an equation.