Per-TRP Uplink Power Control Under Varying Channel Conditions

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Solution Overview

Problem

Existing wireless communication systems face challenges in improving the reliability and robustness of Physical Uplink Shared Channel (PUSCH) transmissions due to the limitations of single-Transmission and Reception Point (TRP) operations, particularly in environments with varying channel conditions.

Innovation Solution

Implementing power control mechanisms for multi-Transmission and Reception Point (TRP) operations using independent power control parameters for each TRP, including target received power, fractional path-loss compensation, and closed loop power control, to enhance PUSCH transmissions through multiple TRPs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If single-TRP operations are used for PUSCH transmissions, then device complexity is reduced, but reliability and robustness deteriorate in environments with varying channel conditions

Engineering Contradiction:

Improvereliability of PUSCH transmissionsVSAvoidcomplexity of power control mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The power control mechanism is segmented by introducing separate power control parameter sets for different TRPs. Each TRP has its own power control parameters including target received power (P0), path loss compensation factor (alpha), and closed-loop adjustment indices, allowing independent optimization for each transmission point while maintaining overall system reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extends the power control dimension from single-TRP to multi-TRP operations by introducing multiple power control parameter sets indexed by TRP identifier. This dimensional extension enables the system to handle varying channel conditions across different TRPs independently, improving reliability without requiring complete redesign of the power control framework

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If independent power control parameters are used for each TRP, then communication performance in diverse channel conditions is improved, but device complexity increases

Engineering Contradiction:

Improveadaptability to diverse channel conditionsVSAvoidcomplexity of power control configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Each TRP is assigned local power control parameters tailored to its specific channel conditions. The target received power P0, path loss compensation factor alpha, and reference signal indices are configured locally for each TRP based on its propagation characteristics, enabling adaptive optimization without requiring global parameter uniformity

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The power control framework maintains universality by using a common parameter structure and configuration mechanism across multiple TRPs. The same power control formulas and adjustment procedures apply to each TRP, allowing the system to handle diverse channel conditions through parameter variation rather than structural complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If multiple power control parameter sets are configured for multi-TRP operations, then robustness of PUSCH transmissions is enhanced, but signalling overhead increases

Engineering Contradiction:

Improverobustness of PUSCH transmissionsVSAvoidsignalling overhead for parameter configuration

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

Instead of configuring completely independent power control mechanisms for each TRP, the system uses copied parameter sets with minor modifications. The same power control parameter structure and adjustment logic are copied across TRPs, with only the specific values (P0, alpha, reference signal indices) varying by TRP, reducing signalling overhead through parameter reusability

Inventive Principle:

Principle #26Copying

Data Source

PatentUS12538236B2System and method for power control in uplink transmissions

Publication Date: 2026.01.27 ZTE CORP

AI summary

A system and method for wireless communication are disclosed herein. One embodiment includes a wireless communication device receiving, from a wireless communication node, a configuration that comprises a plurality of sets of power control parameters; and receiving, from the wireless communication node, a signalling to associate the plurality of sets of power control parameters with a plurality of sets of uplink data transmission instances.