Wireless Electromagnetic Wave Region Classification via Phase Differences
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Solution Overview
Problem
Existing communication networks, particularly 5G and 6G, lack a method to accurately classify electromagnetic wave regions into near-field and far-field, necessitating improved beam direction adjustment for optimal communication.
Innovation Solution
A method and apparatus for determining electromagnetic wave regions by measuring phase differences between transmission paths using reference signals, allowing classification into near-field or far-field, and adjusting reception beams accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional communication methods are used without electromagnetic wave region classification, then device complexity is reduced, but measurement precision and communication reliability deteriorate
Solution Approach 1:
The system performs preliminary classification of electromagnetic wave regions (near-field vs. far-field) before executing main communication operations. By determining the propagation characteristics in advance through reference signal measurement and phase difference calculation, the system can select appropriate communication schemes, thereby improving measurement precision without substantially increasing overall system complexity.
Solution Approach 2:
The patent introduces reference signals as an intermediary element to facilitate electromagnetic wave region classification. These reference signals are transmitted through the channel and measured by the receiver, providing intermediate measurement data (phase differences, delay spreads) that enable region determination without requiring direct complex analysis of the communication signal itself.
2Measurement precision
If phase difference measurement is performed to determine electromagnetic wave region, then measurement precision improves, but loss of time increases due to additional measurement steps
Solution Approach 1:
The patent combines electromagnetic wave region classification with existing reference signal transmission and measurement procedures. By measuring phase differences of reference signals that are already being transmitted for channel estimation purposes, the system achieves region determination without requiring separate dedicated measurement time, thus improving measurement precision while minimizing time loss.
Solution Approach 2:
The reference signals serve multiple functions simultaneously: they enable channel estimation, provide data for electromagnetic wave region classification through phase difference measurement, and support beam management. This multi-functionality allows the system to achieve accurate region determination without allocating additional time resources specifically for classification.
3Adaptability or versatility
If electromagnetic wave region classification is implemented, then adaptability improves for different propagation environments, but device complexity increases due to additional determination procedures
Solution Approach 1:
The system dynamically adapts communication parameters based on electromagnetic wave region classification results. By determining whether the channel is in near-field or far-field and adjusting beamforming strategies, transmission schemes, and reception patterns accordingly, the system achieves high adaptability to different propagation environments while keeping the determination procedure integrated into existing dynamic communication frameworks.
Solution Approach 2:
The patent changes communication parameters (beam directions, transmission schemes, reception patterns) based on electromagnetic wave region classification. By measuring phase differences and delay spreads to determine the region, then adjusting parameters such as beamforming vectors and modulation schemes, the system achieves adaptability without requiring fundamentally different system architectures for near-field and far-field communication.
Data Source
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AI summary
The present invention relates to a technology for determining an electromagnetic wave area in a wireless communication environment and may provide a method of a base station, wherein the method of the base station may comprise the steps of: obtaining at least one phase difference generated in at least two transmission paths between the base station and a terminal; determining whether the at least one phase difference satisfies a far-field assumption; and determining an electromagnetic wave area on the basis of whether the far-field assumption is satisfied.