In-Vehicle Reflectarray Signal Redirection for 5G Coverage
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Solution Overview
Problem
The increasing demand for high-speed and reliable 5G wireless communication within vehicles is hindered by the short-range and easily blocked nature of mm-wave signals, which requires a more extensive infrastructure and increased energy consumption, leading to heat and reliability issues.
Innovation Solution
The implementation of an in-vehicle communication system utilizing edge and internal reflectarrays to amplify and redirect 5G signals, combined with active relay antenna systems, to enhance signal gain and coverage within vehicles, enabling communication with base stations and other network components without the need for beam steering and computationally intensive techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If mm-wave signals are used for 5G communication in vehicles, then high-speed communication is achieved, but signal range is limited and easily blocked
Solution Approach 1:
The patent introduces reflectarrays as intermediary devices that redirect and amplify mm-wave signals. The reflectarray acts as a mediator between the external wireless environment and the vehicle interior, enabling signals to bypass obstructions and extend coverage without requiring direct line-of-sight transmission, thus maintaining high-speed communication while improving signal reliability.
Solution Approach 2:
The patent transitions from traditional planar antenna arrangements to three-dimensional reflectarray structures positioned at multiple locations within the vehicle. This spatial dimensionality change enables signals to be redirected through different paths and angles, overcoming blockage issues while preserving the high-speed capability of mm-wave communications.
2Reliability
If infrastructure is expanded to support 5G communication, then coverage is improved, but energy consumption increases
Solution Approach 1:
The reflectarray system is designed to passively redirect and amplify incoming signals using reflective surfaces rather than requiring active amplification infrastructure throughout the vehicle. This self-service approach extends coverage by utilizing the existing signal paths and vehicle structure, significantly reducing the energy consumption compared to traditional active relay or repeater systems.
3Reliability
If beam steering techniques are used to improve signal coverage, then communication quality is enhanced, but computational complexity increases
Solution Approach 1:
The patent replaces complex electronic beam steering mechanisms with passive optical/m electromagnetic reflection principles. Instead of dynamically adjusting beam directions through complex phase shifters and control systems, the reflectarray uses fixed reflective surfaces to redirect signals, dramatically reducing computational complexity while maintaining effective signal coverage.
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 solution provides improved signal quality and reliability for 5G communications within vehicles, extending coverage and reducing energy consumption by using reflectarrays to amplify and redirect signals, thus addressing the challenges of signal blockage and infrastructure demands.
Implementation Method 1
The reflectarray redirects signals from wireless extension devices to areas within the vehicle
Implementation Method 2
a relay antenna system configured to receive signals from base stations and transmit the signals to user equipment within the vehicle
Data Source
AI summary
Examples disclosed herein relate to illustrate an in-vehicle communication system having wireless extension devices, such as an active repeater or an edge reflectarray device. The wireless extension devices operate in coordination to redirect signals within a vehicle.