Closed Loop Power Control Index for Multi-Beam NR

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Solution Overview

Problem

The existing power control methods in new radio (NR) technology face challenges in clearly indicating closed loop power control loops, leading to unclear power adjustments in multi-beam scenarios.

Innovation Solution

A power control method and device that explicitly determine and indicate the closed loop power control index within the Downlink Control Information (DCI), allowing for precise power adjustments by correlating the TPC command with the corresponding closed loop power control index.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If TPC command is issued in group in DCI to support multiple closed loop power control loops, then power adjustment capability is improved, but indication clarity deteriorates

Engineering Contradiction:

Improvepower adjustment capabilityVSAvoidindication clarity

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent segments the TPC command structure by introducing a closed-loop power control index field that divides the grouped power control commands into individually identifiable segments. Each segment can be independently identified through the index field, allowing clear indication while maintaining group issuance capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The closed-loop power control index acts as an intermediary element between the grouped TPC command and the specific power control loop. This index field serves as a mediator that provides clear identification and mapping between the grouped command structure and individual power control loops, resolving the indication clarity issue.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple closed loop power control loops are supported in multi-beam scenario, then system adaptability is improved, but control complexity increases

Engineering Contradiction:

Improvemulti-beam support capabilityVSAvoidcontrol complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a universal TPC command structure that can handle multiple closed loop power control loops through a standardized index field. This multi-functional command structure allows the same grouped DCI format to support various power control scenarios (single beam, multi-beam, different BPLs) without requiring separate control mechanisms, thereby reducing overall system complexity while maintaining adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP3761721B1Power control method and device, and communication node

Publication Date: 2025.06.18 ZTE CORP

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AI summary

Disclosed is a power control method. The method includes: receiving downlink control information, DCI, where the DCI carries a transmit power control, TPC, command; determining a closed loop power control index of the TPC command in the DCI; and updating a closed loop power control part corresponding to the closed loop power control index in transmit power of a first communication node according to the TPC command. Also disclosed are a power control device, a first communication node, a second communication node, and a computer storage medium.