Antenna Direction Determination Using Power Loss and Angle Tolerance

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Solution Overview

Problem

In 5G NR mmWave communication, determining the beam direction for antennas is challenging when the number or type of antennas differs between transmission and reception, as existing assumptions about reciprocity between Tx and Rx beams do not hold, leading to uncertainty in beam correspondence and signal tolerance.

Innovation Solution

A method is proposed to determine the antenna direction based on power loss tolerance and angle tolerance, with specific tolerances set at maximum 2 dB power loss and ±18 degrees in both horizontal and vertical directions, depending on the number of antennas, to ensure effective beam correspondence and signal transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the number or type of antennas differs between transmission and reception, then beam reciprocity assumption cannot be made, but this leads to uncertainty in beam direction and reduced reliability

Engineering Contradiction:

Improveantenna configuration flexibilityVSAvoidbeam correspondence reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies parameter changes by establishing specific tolerance thresholds (2 dB power loss tolerance and ±18 degrees angle tolerance) to determine whether beam correspondence can be assumed. These quantitative parameters provide a systematic way to handle different antenna configurations while maintaining reliability through defined acceptance criteria.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If beam direction is determined without considering angle tolerance, then transmission simplicity is maintained, but beam accuracy and signal quality deteriorate

Engineering Contradiction:

Improvebeam direction determination simplicityVSAvoidbeam direction accuracy

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The patent introduces angle tolerance as a critical parameter (±18 degrees in both horizontal and vertical directions) that quantifies the acceptable deviation from the determined beam direction. This parameter enables the system to balance operational simplicity with directional accuracy by defining a tolerance band within which beam correspondence is valid.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If power loss tolerance is set too low, then beam precision is improved, but the system becomes more sensitive to configuration variations and less robust

Engineering Contradiction:

Improvebeam direction precisionVSAvoidtolerance to antenna configuration variations

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The patent sets the power loss tolerance at 2 dB as an optimal parameter that balances precision and robustness. This quantitative threshold allows the system to maintain acceptable beam precision while tolerating reasonable variations in antenna configurations, providing a practical balance between accuracy and adaptability.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10855341B2Method of determining direction of antenna for transmitting signal by terminal

Publication Date: 2020.12.01 LG ELECTRONICS INC

AI summary

The present invention discloses a method of transmitting signal by a terminal. The method comprises determining a direction of at least one antenna based on power loss tolerance of the signal and angle tolerance of the at least one antenna; and transmitting the signal based on the direction of the at least one antenna, wherein the power loss tolerance of the signal is determined at maximum of 2 dB.