Radio Wave Reflection Direction Control With Arrival-Angle Estimation
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Solution Overview
Problem
Existing methods for dynamically controlling the reflection characteristics of radio waves using dynamic reflection plates require significant calculation resources and channel information for each array element, leading to increased overhead and the need for advanced base station functions.
Innovation Solution
A reflection direction control method and system that estimate the arrival direction of radio waves and control the phase of reflection elements to dynamically adjust the reflection direction, allowing for switching between antenna and reflection modes without extensive calculation or channel information acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel information for each array element is acquired to optimize reflection characteristics, then reception quality is improved, but calculation overhead and system complexity increase
Solution Approach 1:
The patent extracts only the essential information needed for reflection control (arrival direction of radio waves) from the complete channel information, eliminating the need to process all array element-specific channel data. This reduces calculation overhead while maintaining the ability to optimize reflection characteristics for improved reception quality.
Solution Approach 2:
The patent uses a simplified model that copies only the necessary geometric and directional parameters (arrival direction, reflection point position) rather than complete channel information. This allows the system to achieve optimization with reduced data processing requirements.
2Manufacturing precision
If advanced base station functions are implemented to calculate phase changes, then reflection control precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent enables the reflection plate to self-adjust its phase characteristics based on simple arrival direction information, eliminating the need for complex base station calculation functions. The system achieves precise reflection control through the inherent capabilities of the reflection plate combined with minimal control information.
Solution Approach 2:
The patent changes the control parameter from complex channel information to simple arrival direction parameters. This parameter transformation allows precise reflection control to be achieved with much simpler base station functions, reducing device complexity while maintaining control precision.
3Reliability
If a large number of transmission antennas are installed to improve reception quality in shielding conditions, then reception quality is improved, but installation cost and network complexity increase
Solution Approach 1:
The patent introduces a reflection plate as an intermediary element that redirects radio waves around obstacles and shielding structures. This single reflection plate can provide the same diversity effect as multiple transmission antennas, improving reception quality in shielding conditions without the associated installation complexity and cost.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables dynamic control of radio wave reflection directions with reduced computational overhead, allowing for efficient communication without the need for advanced base station functions or extensive channel information processing.
Implementation Method 1
one or more reflection units 5 each including a plurality of reflection elements 50 capable of dynamically changing phase characteristics when a radio wave is reflected
Implementation Method 2
a phase control unit 662 configured to control a phase of a radio wave reflected by each of the plurality of reflection elements
Data Source
AI summary
A reflection direction control method includes an arrival direction estimation step of estimating an arrival direction of radio waves transmitted by a wireless terminal to one or more reflection units each including a plurality of reflection elements capable of dynamically changing phase characteristics when the radio wave is reflected, a phase control step of controlling a phase of a radio wave reflected by each of the plurality of reflection elements so that the reflection unit reflects, in a predetermined direction, the radio wave transmitted from the estimated arrival direction, and a switching step of switching between an antenna mode in which the reflection unit is caused to receive the radio wave of which the arrival direction is estimated and a reflection mode in which the reflection unit is caused to reflect the radio wave.