Versioned A-MPR Table Signaling for Legacy UE Interference

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Solution Overview

Problem

Legacy user equipment (UE) does not recognize new additional maximum power reduction (A-MPR) tables when roaming into networks with stricter emission requirements, leading to potential interference with public safety systems due to excessive unwanted emissions.

Innovation Solution

Implementing versioned A-MPR tables and corresponding signaling to allow UEs to indicate supported table versions, enabling the network to manage UE power settings effectively and prevent interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If new A-MPR tables with stricter emission requirements are implemented in the network, then emission compliance is improved, but legacy UEs cannot recognize these tables leading to interference

Engineering Contradiction:

Improveunwanted emissionsVSAvoidUE compatibility

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The A-MPR tables are segmented by version identifiers. New A-MPR tables are created as separate entities with version information, allowing the network to selectively apply different table versions to different UEs based on their capabilities. This segmentation enables legacy UEs to use older tables while newer UEs use updated tables with stricter emission requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The network performs preliminary actions by signaling the A-MPR table version to UEs before actual power transmission. This advance notification allows UEs to prepare and select the appropriate A-MPR table based on the signaled version, ensuring compatibility and preventing interference from the outset.

Inventive Principle:

Principle #10Preliminary action

2Extent of automation

If A-MPR table version signaling is implemented, then network control over UE power settings is improved, but signaling overhead increases

Engineering Contradiction:

Improvenetwork controlVSAvoidsignaling overhead

Core Design Contradiction:

Extent of automationVSLoss of information

Solution Approach 1:

The version information is extracted as a separate, minimal element from the full A-MPR table configuration. Instead of signaling entire tables, only the version identifier is transmitted, significantly reducing signaling overhead while maintaining network control capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The signaling approach changes from transmitting full A-MPR table configurations to transmitting only version parameters. This parameter change reduces the amount of information that needs to be signaled while still enabling the network to control which A-MPR tables UEs should use.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP2880946B1Apparatus and method for support of additional maximum power reduction by user equipment

Publication Date: 2020.11.25 NOKIA TECHNOLOGIES OY

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AI summary

According to an example embodiment of this application, a method may include by a processor, receiving an indication of the version of an additional maximum power reduction table supported by a user equipment (401). According to an example embodiment of this application, a method may include by a processor, allocating different resources to a user equipment, receiving power headroom reports generated by the user equipment based on the allocated resources, and determining based on the received power headroom reports whether the user equipment supports an additional maximum power reduction table.