Passive MIMO RIS Control Interface for Blockage-Resilient Beamforming
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Solution Overview
Problem
There is a need for further improvements in 5G NR technology to enhance communication systems, particularly in addressing blockages and improving channel diversity and efficiency, especially in millimeter wave communications.
Innovation Solution
A passive-multiple input multiple output (P-MIMO) control interface is established between a base station and a reflective intelligent surface (RIS) using synchronization signals to configure the RIS for controlled reflection of signals, enabling intelligent beamforming and coverage extension with reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple control inputs are connected to a single control line, then the number of control lines is reduced, but signal interference and crosstalk increase
Solution Approach 1:
The control interface is segmented into multiple independent control lines instead of using a single shared control line. Each control line is dedicated to a specific control input, physically separating the signal paths to eliminate crosstalk and interference while maintaining a simplified overall architecture.
Solution Approach 2:
A passive control interface structure acts as an intermediary between multiple control inputs and the controlled device. This interface uses multiple isolated control lines as mediators to transmit control signals without direct interference, allowing multiple inputs to coexist without signal degradation.
2Device complexity
If multiple control inputs are connected to a single control line, then wiring is simplified, but control reliability decreases
Solution Approach 1:
The control interface is segmented into multiple independent control lines instead of using a single shared control line. Each control line is dedicated to a specific control input, physically separating the signal paths to eliminate crosstalk and interference while maintaining a simplified overall architecture.
Solution Approach 2:
The passive control interface structure provides a universal solution that can accommodate multiple different control inputs (buttons, switches, sensors) while maintaining consistent signal integrity across all inputs through its multi-line architecture.
3Adaptability or versatility
If active control components are used, then control functionality is enhanced, but power consumption and system complexity increase
Solution Approach 1:
The control interface operates passively without requiring external power sources or active electronic components. The control lines directly transmit signals from control inputs to the controlled device, allowing the system to serve itself without additional power consumption while maintaining full control functionality.
Solution Approach 2:
Active control components (such as amplifiers, buffers, or processing electronics) are extracted from the control interface, leaving only the passive signal transmission path. This removal eliminates power consumption and complexity while preserving the essential control functionality through direct signal routing.
Data Source
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AI summary
A method and apparatus for a reflective intelligent surface (RIS) control interface. The apparatus transmits, to a RIS, a synchronization signal to establish a level of synchronization between the base station and the RIS. The level of synchronization between the base station and the RIS configures the RIS to receive a control signal from the base station. The apparatus transmits, to the RIS, the control signal comprising a RIS configuration. The apparatus may transmit, to the RIS, a signal for reflection by the RIS to at least a first wireless device.