Dynamic Antenna Adaptation for 5G NR Interference and Power Control

Solution Overview

Problem

In 5G NR networks, user equipment (UE) experiences substantial interference during transitions between different bandwidth parts (BWPs) and antenna configurations, leading to inefficient power consumption and interference issues.

Innovation Solution

Implementing time-period-based antenna adaptation by receiving an antenna adaptation command to determine optimal combinations of transmit and receive antennas for specific periods, adjusting antenna configurations to reduce interference and optimize power usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a UE is switched to a larger BWP with more layers during high data rate transmission, then data transmission capacity is improved, but power consumption increases

Engineering Contradiction:

Improvedata transmission capacityVSAvoidpower consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic BWP adaptation where the UE switches between different BWP configurations based on real-time data rate requirements. During high data rate periods, the UE uses a larger BWP with more layers to maximize capacity. During low data rate periods, the UE switches to a smaller BWP with fewer layers to reduce power consumption. This dynamic switching resolves the contradiction by making the system adaptable to varying transmission demands rather than operating at fixed capacity levels.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If a UE is switched to a smaller BWP with fewer layers during low data rate transmission, then power consumption is reduced, but data transmission capacity decreases

Engineering Contradiction:

Improvepower consumptionVSAvoiddata transmission capacity

Core Design Contradiction:

Use of energy by moving objectVSProductivity

Solution Approach 1:

The patent implements dynamic BWP adaptation where the UE switches between different BWP configurations based on real-time data rate requirements. During high data rate periods, the UE uses a larger BWP with more layers to maximize capacity. During low data rate periods, the UE switches to a smaller BWP with fewer layers to reduce power consumption. This dynamic switching resolves the contradiction by making the system adaptable to varying transmission demands rather than operating at fixed capacity levels.

Inventive Principle:

Principle #15Dynamics

3Use of energy by moving object

If a UE falls back from 2T4R to 1T2R antenna configuration, then power consumption is reduced, but interference susceptibility increases

Engineering Contradiction:

Improvepower consumptionVSAvoidinterference susceptibility

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent implements dynamic antenna configuration adaptation where the UE switches between different T/R configurations based on real-time conditions. When falling back from 2T4R to 1T2R to reduce power consumption, the system applies interference mitigation techniques including adjusting receive beamforming weights and modifying resource allocation to minimize the impact of same-link and cross-link interference on the reduced antenna configuration.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12375187B2Adaptation of transmit and receive antennas

Publication Date: 2025.07.29 QUALCOMM INC

AI summary

An antenna adaptation is provided for a communication node as controlled by an antenna adaptation command. The antenna adaptation command adjusts the number of active transmit antennas and/or the number of active receive antennas in the communication node such as for reducing interference at the communication node.