User Terminal Transmit Power Control for Multi-Waveform 5G

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Solution Overview

Problem

Future radio communication systems, such as 5G and NR, face challenges in maintaining communication throughput and quality due to inadequate power control methods for different waveforms, leading to potential over or under-power issues during waveform switching.

Innovation Solution

A user terminal that performs independent or common transmit power control for multiple waveforms, using correction values and waveform-specific offsets to ensure appropriate power levels, and shares information with the base station to accurately estimate path-loss and adjust transmit power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a plurality of waveforms are used for uplink transmission, then communication services with different requirements (eMBB, mMTC, URLLC) can be supported, but transmit power control becomes insufficient leading to throughput deterioration

Engineering Contradiction:

Improvesupport for multiple communication servicesVSAvoidcommunication throughput

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the power control mechanism by introducing waveform-specific parameters (first waveform parameter and second waveform parameter) that are independently configured for different waveforms. This allows each waveform to have its own optimized power control settings, resolving the contradiction between supporting multiple services and maintaining reliable throughput for each service type.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by configuring different power control parameters specifically for each waveform type. The first power control parameter is applied when the first waveform is used, and the second power control parameter is applied when the second waveform is used, ensuring that each waveform operates with locally optimized power control settings appropriate to its specific requirements.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If waveform switching is performed dynamically, then communication flexibility is improved, but transmit power becomes unstable causing quality deterioration

Engineering Contradiction:

Improvewaveform switching flexibilityVSAvoidtransmit power stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent implements preliminary action by pre-configuring waveform-specific power control parameters before waveform switching occurs. The base station configures the first power control parameter and second power control parameter in advance, so that when waveform switching happens dynamically, the appropriate parameter is already ready to be applied, maintaining power stability during the transition.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent applies dynamics by enabling flexible switching between different waveforms and their corresponding power control parameters based on real-time communication requirements. The system can dynamically select which waveform to use and apply the appropriate power control parameter, providing adaptability while maintaining stability through pre-configured parameters.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11330528B2Terminal and radio communication method using a plurality of waveforms

Publication Date: 2022.05.10 NTT DOCOMO INC

AI summary

Communication is suitably continued even when communication is performed by using a plurality of waveforms. A user terminal according to one aspect of the present invention includes: a transmission section that transmits a first signal and a second signal by using respectively different radio resources, the first signal conforming to a first transmission scheme-based waveform and the second signal conforming to a second transmission scheme-based waveform; and a control section that performs transmit power control on a signal to be transmitted.