Radio Wave Reflection Phase Control for Low-Overhead Beam Steering
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Solution Overview
Problem
Conventional systems require significant calculation overhead and advanced signal processing at the base station to dynamically control the phase of radio waves using a dynamic reflector, especially when numerous array elements are involved, and this is impractical for remote installations.
Innovation Solution
A reflection direction control system that estimates the position and incident direction of wireless terminals using radio waves, calculates the phase of reflection elements to steer radio waves towards a predetermined direction, and controls the phase of these elements without requiring extensive channel information or advanced processing at the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional channel information-based phase control is used with numerous array elements, then reception quality can be optimized, but calculation overhead and base station processing requirements increase significantly
Solution Approach 1:
The patent extracts the phase control functionality from the base station and relocates it to the reflection elements themselves. Each reflection element independently controls the phase of reflected radio waves based on simple local measurements, eliminating the need for complex centralized calculation and channel information collection at the base station.
Solution Approach 2:
The reflection elements perform self-control of phase adjustment by measuring the intensity of received radio waves and automatically adjusting their reflection phase to maximize signal intensity at the receiver, without requiring external control signals or complex base station processing.
2Reliability
If multiple transmission antennas are installed to improve reception quality and reduce shielding effects, then spatial multiplexing and space diversity gain are achieved, but network cost and installation complexity increase
Solution Approach 1:
The patent segments the reflection control function into multiple independent reflection elements distributed across the service area. Each element independently controls its local reflection characteristics, collectively achieving spatial diversity and shielding mitigation effects without requiring multiple complete transmission antenna systems.
Solution Approach 2:
The reflection elements act as intermediaries between the transmission station and reception station, dynamically adjusting the radio wave propagation environment to achieve diversity gain and overcome shielding effects without requiring direct multiple transmission paths.
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 with reduced calculation overhead and without the need for advanced base station processing, facilitating efficient wireless communication.
Implementation Method 1
controlling the phase of radio waves to be reflected by each of the plurality of reflection elements
Implementation Method 2
when the dynamic reflector reflects the radio wave
Data Source
AI summary
The reflection direction control system includes a plurality of reflection units each including a plurality of reflection elements, a position estimation unit for estimating a position of each of the wireless terminals on the basis of radio waves transmitted to the plurality of reflection parts wireless terminals, a direction estimation unit for estimating an incident direction of the radio waves transmitted by each of the wireless terminals to the reflection units, a phase calculation unit for calculating a phase of the radio waves to be reflected so that the reflection unit reflects the radio waves made incident in the direction estimated by the direction estimation unit in a predetermined direction, and a phase control unit for controlling the phase of the radio waves reflected by each of the plurality of reflection elements on the basis of the phase calculated by the phase calculation unit.