Cell Transmit Power Change in Wireless Networks

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Solution Overview

Problem

In wireless communication networks, particularly in non-terrestrial networks with low-Earth orbit satellites, the frequent handovers due to satellite movement lead to challenges in efficiently reducing cell transmit power, resulting in increased energy consumption and interference.

Innovation Solution

A solution that allows network devices to inform user equipment (UEs) about cell operation mode changes without requiring a system information (SI) change indication, enabling faster and more efficient cell transmit power adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cell transmit power is reduced to enable smooth handover, then handover performance is improved, but the speed of power reduction is limited by the modification period

Engineering Contradiction:

Improvehandover performanceVSAvoidpower reduction speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The network device performs preliminary actions by reducing cell transmit power before the actual handover event. The power reduction is initiated in advance based on predicted handover timing, allowing the target cell to reach optimal power levels before the UE actually switches cells, thereby improving handover performance without being constrained by the modification period timing.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If system information is updated to reflect power level changes, then UE measurement accuracy is improved, but UE energy consumption increases

Engineering Contradiction:

ImproveUE measurement accuracyVSAvoidUE energy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The network device performs preliminary action by configuring UEs with predicted handover timing and power reduction parameters in advance. This allows UEs to perform measurements and prepare for handover without requiring continuous system information updates, thereby maintaining measurement accuracy while reducing UE energy consumption by avoiding frequent SI reading.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If cell overlap time is reduced to minimize interference, then network efficiency is improved, but power level changes must be executed faster than modification period allows

Engineering Contradiction:

Improvenetwork efficiencyVSAvoidpower level change time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The network device executes preliminary power reduction actions before the predicted handover timing. By initiating power level changes in advance based on predicted UE movement and handover events, the system can reduce cell overlap time and minimize interference without being constrained by the modification period, thereby improving network efficiency.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250159616A1Cell transmit power change in wireless communication networks

Publication Date: 2025.05.15 NOKIA TECHNOLOGIES OY

AI summary

Various example embodiments relate to a solution for network communication. A network device may be configured to cause transmission of cell operation mode configuration parameters to be applied in a cell operation mode; and cause transmission of a cell operation mode indication associated with at least one cell of a network, the cell operation mode indication initiating a cell transmission power change sequence.