Radio Terminal Uplink Power Control Mapping for Beam Indication

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Solution Overview

Problem

Future radio communication systems lack appropriate methods for determining parameters related to uplink transmission power control, which can lead to deteriorated communication throughput.

Innovation Solution

A terminal that receives downlink control information including specific information and maps it to parameters for uplink shared channel transmission power control using higher layer signaling, enabling appropriate determination of these parameters.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If UL TCI state and spatial relation information are adopted for beam indication in uplink transmission, then beam indication capability is improved, but the method for determining transmission power control parameters becomes undefined leading to communication throughput deterioration

Engineering Contradiction:

Improvebeam indication capabilityVSAvoidcommunication throughput

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent extends the existing SRI-based power control parameter determination mechanism to work with the new UL TCI state framework. By making the power control parameter mapping applicable to both SRI and UL TCI state, the system maintains backward compatibility while enabling forward compatibility with beam indication capabilities.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent pre-configures the mapping relationship between UL TCI state and power control parameters through higher layer signaling before actual uplink transmission occurs. This preliminary configuration ensures that when UL TCI state is indicated, the corresponding power control parameters are already determined and ready for use, preventing throughput deterioration.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If new UL TCI state framework is implemented for future radio communication systems, then system capability is improved, but parameter determination complexity increases

Engineering Contradiction:

Improvesystem capabilityVSAvoidparameter determination complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the power control parameter determination procedures for SRI and UL TCI state into a unified framework. By combining these previously separate mechanisms, the patent reduces overall system complexity while maintaining the advanced capabilities of the UL TCI state framework.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12445970B2Terminal, radio communication method, and base station

Publication Date: 2025.10.14 NTT DOCOMO INC

AI summary

A terminal according to one aspect of the present disclosure includes: a receiving section that receives downlink control information (DCI) including specific information different from a sounding reference signal resource indicator (SRI), and receives mapping between the specific information and a parameter related to uplink shared channel (PUSCH) transmission power control by using higher layer signaling; and a control section that determines a parameter used for the PUSCH transmission power control, based on the specific information and the mapping. According to one aspect of the present disclosure, parameters related to UL transmission power control can be appropriately determined.