Radio Wave Reflection Phase Control With Low Channel Overhead
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Solution Overview
Problem
Conventional systems require significant overhead and advanced base station functions to dynamically control the phase of radio waves reflected by dynamic reflectors, especially when dealing with large numbers of array elements, which limits the ability to improve reception quality without additional network costs and installation complexities.
Innovation Solution
A reflection direction control system that estimates the incident direction of radio waves using base station position information and wireless terminal position information, calculates the phase of radio waves to be reflected by each reflection element, and controls the phase to dynamically direct radio waves towards the wireless terminal, reducing the need for channel information per array element and base station processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel information for each array element is used to control the phase of reflected radio waves, then the reception quality can be optimized, but the overhead and calculation complexity increase significantly
Solution Approach 1:
The patent extracts only the essential information needed for phase control - specifically the incident direction of radio waves - while discarding the need for complete channel information for each array element. This selective extraction reduces overhead while maintaining the ability to optimize reception quality through directional beam control.
Solution Approach 2:
Instead of using channel information from the reception station to control the reflector, the patent inverts the approach by using incident direction information from the transmission station to directly control the phase of reflected waves. This inversion eliminates the need for complex channel state feedback while achieving similar reception optimization.
2Manufacturing precision
If channel information for each array element is collected and processed, then the phase control precision can be improved, but the device complexity and base station functionality requirements increase
Solution Approach 1:
The patent extracts only the critical parameter - incident direction - from the complete channel information set. This extraction maintains sufficient phase control precision for beamforming while dramatically reducing the computational complexity and functional requirements of the base station.
Solution Approach 2:
The patent changes the parameter used for phase control from detailed channel information (complex) to incident direction (simple). This parameter transformation maintains the essential functionality for precise phase control while reducing the complexity of the required base station processing capabilities.
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
This approach allows for dynamic control of radio wave reflection with reduced calculation overhead, enabling improved reception quality without the need for advanced base station functions or extensive channel information processing, thus enhancing communication coverage and efficiency.
Implementation Method 1
a phase calculation unit that calculates a phase of radio wave to be reflected by each of the plurality of reflection elements so that the reflection unit reflects the radio waves transmitted by the base station toward the wireless terminal
Data Source
AI summary
A reflection direction control system includes a reflection unit including a plurality of reflection elements, a direction estimation unit that estimates an incident direction of a radio wave transmitted by a base station to the reflection unit on the basis of base station position information indicating a preset position of the base station, a phase calculation unit that calculates a phase of the radio wave to be reflected by each of the plurality of reflection elements so that the reflection unit reflects the radio waves transmitted by the base station toward the wireless terminal on the basis of the position information of the wireless terminal received from the wireless terminal, and a phase control unit that controls the phase of the radio wave reflected by each of the plurality of reflection elements on the basis of the phase calculated phase calculation unit.