CSI-RS Power Offset Feedback for Variable-Power WTRU Operation

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing variable power transmissions, particularly in energy-saving modes, leading to excessive overhead and suboptimal channel state information reporting.

Innovation Solution

A wireless transmit/receive unit (WTRU) is configured to receive and adjust power offsets for channel state information reference signals (CSI-RS) resources, allowing dynamic power ratio adjustments and reporting, thereby optimizing CSI feedback for variable power networks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If dynamic power adjustments are implemented for energy saving modes, then energy efficiency is improved, but channel state information reporting accuracy deteriorates due to variable transmission power

Engineering Contradiction:

Improveenergy efficiencyVSAvoidchannel state information reporting accuracy

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The patent implements a feedback mechanism where the WTRU reports CSI based on measured CSI-RS power levels and adjusts power offset assumptions accordingly. The network receives CSI feedback and can adjust downlink power settings dynamically, creating a closed-loop system that maintains measurement accuracy despite variable power conditions.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent changes the parameter approach by introducing power offset values that compensate for variable transmission power. Instead of assuming fixed power levels for CSI calculations, the system dynamically adjusts power offset parameters based on actual measured CSI-RS power levels, allowing accurate CSI reporting even when transmission power varies for energy saving.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If power offset adjustments are performed for each CSI-RS resource, then CSI reporting accuracy is improved, but signaling overhead increases

Engineering Contradiction:

ImproveCSI reporting accuracyVSAvoidsignaling overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent merges the power offset adjustment mechanism with the existing CSI-RS resource configuration. Instead of separate signaling for power offsets, the system combines power offset values with the CSI-RS resource configuration parameters, allowing power adjustments to be conveyed through existing configuration messages without additional overhead.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces dynamic power offset values that can be adjusted based on measured CSI-RS power levels. The system dynamically determines appropriate power offsets for different CSI-RS resources based on actual measurements, allowing flexible adaptation without requiring static, pre-configured power settings for every possible scenario.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If multiple power offset values are configured for different CSI-RS resources, then adaptability to variable power is improved, but device complexity increases

Engineering Contradiction:

Improveadaptability to variable powerVSAvoidpower offset management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the power offset management by associating specific power offset values with specific CSI-RS resource configurations. Instead of managing a single complex power adjustment system, the system divides power offset configuration into discrete, resource-specific segments, making it easier to implement and manage multiple power scenarios.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system enables self-service power offset determination where the WTRU autonomously measures CSI-RS power levels and automatically selects appropriate power offset values for CSI reporting. This self-service approach reduces the need for complex network-controlled power management and simplifies the overall system operation.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20260074861A1Operating in a network with variable power

Publication Date: 2026.03.12 INTERDIGITAL PATENT HOLDINGS INC

AI summary

Systems, methods, and instrumentalities are described herein GROUP B for wireless transmit/receive unit (WTRU) operation in a network with variable power transmissions (e.g., based on an energy saving mode of operation). A device (e.g., a WTRU) may be configured to perform one or more actions. The device may receive configuration information indicating a power offset associated with a channel state information reference signal (CSI-RS) resource. The device may receive a power offset change for the CSI-RS resource. The device may determine an adjusted power offset associated with GROUP A the CSI-RS resource based on the power offset and the power offset change. The device may determine CSI feedback for the first CSI-RS resource based on a measurement associated with the first CSI-RS resource and the adjusted power offset. The device may send a send a CSI feedback report. WO