Closed-Loop Power Control for Multi-Panel 5G Transmission

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Solution Overview

Problem

Current wireless communication systems, particularly in multi-panel transmission for 5G NR, lack a mechanism for panel-specific power control for PUSCH/PUCCH transmission, leading to a need for closed-loop power control to optimize antenna panel power adjustments.

Innovation Solution

A method and device for closed-loop power control in multi-panel transmission, where user equipment receives a transmission power control command and obtains antenna panel information to apply power control adjust values specifically to each antenna panel for PUSCH/PUCCH transmission, using DCI formats 0_0, 0_1, and 2_2, and RRC signaling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multi-panel transmission is implemented without panel-specific power control, then the system supports multiple antenna panels for improved spatial diversity, but there is no mechanism to apply power control adjust values to specific antenna panels leading to suboptimal power management

Engineering Contradiction:
Improvemulti-panel transmission capabilityVSAvoidpower control mechanism
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent segments the power control mechanism by introducing panel-specific power control adjust values that can be independently applied to different antenna panels. The DCI format is segmented to include separate TPC commands for each panel, allowing independent power adjustment rather than applying a single power control value to all panels collectively.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by enabling different power control parameters to be assigned to different antenna panels based on their specific characteristics and transmission requirements. Each panel can have its own power control adjust value, allowing localized optimization of transmit power for each panel rather than uniform power control across all panels.

Inventive Principle:
Principle #3Local quality

2Measurement precision

If panel-specific power control is implemented, then power control precision for each antenna panel is improved, but the complexity of power control signaling and processing increases

Engineering Contradiction:
Improvepower control precisionVSAvoidpower control signaling
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent introduces dynamic panel identification mechanisms where the UE determines which antenna panel is currently active or being used for transmission. The power control signaling dynamically adapts to the current transmission scenario by activating only the relevant panel-specific TPC commands, rather than maintaining fixed complex signaling structures for all possible panels simultaneously.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent uses DCI format 0_1 as an intermediary carrier that transports both the panel identification information and the corresponding panel-specific TPC commands. This intermediary structure allows the system to convey multiple pieces of information (panel ID, TPC value, panel activation status) in a unified signaling mechanism, reducing the need for separate dedicated signaling channels for each parameter.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS11265818B2Method of closed-loop power control in multi-panel transmission and related device
Publication Date: 2022.03.01 SHARP KK
  • US11265818B2 patent drawing
  • US11265818B2 patent drawing

AI summary

A method of closed-loop power control for a user equipment (UE) in multi-panel transmission is disclosed. The method comprises receiving a transmission power control (TPC) command indicating at least a power control adjust value carried by downlink control information (DCI), obtaining antenna panel information for identifying a characteristic of one of a plurality of antenna panels of the UE, and applying the power control adjust value to at least one antenna panel for physical uplink (UL) shared channel (PUSCH)/physical UL control channel (PUCCH) transmission according to the obtained antenna panel information.