Roadside Beam Pointing Using RFID Vehicle Position Detection

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Solution Overview

Problem

High-speed vehicle movement exacerbates time-varying communication channels in V2X wireless technology, leading to challenges in maintaining communication quality and requiring excessive hardware and complex computations for beam pointing direction adjustments.

Innovation Solution

A roadside apparatus using RFID readers to detect signal strength and identification information from mobile vehicles, determining their position and directing communication beams, thereby reducing hardware costs and improving communication quality without the need for multiple antennas or complex mathematical computations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If singular value decomposition method is used to improve communication quality, then communication quality is improved, but hardware cost increases and beam pointing direction adjustment becomes delayed

Engineering Contradiction:

Improvecommunication qualityVSAvoidhardware cost

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the complex mechanical/mathematical computation system (singular value decomposition requiring multiple antennas and complex calculations) with a signal strength detection system using RFID readers. The roadside apparatus detects response signal strength from vehicles and directly adjusts communication beams based on this simple measurement, eliminating the need for complex mathematical computations and reducing hardware requirements while maintaining communication quality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If singular value decomposition method is used to improve communication quality, then communication quality is improved, but beam pointing direction adjustment becomes delayed

Engineering Contradiction:

Improvecommunication qualityVSAvoidbeam pointing direction adjustment time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces the complex mathematical computation process with direct signal strength detection and threshold-based positioning. The roadside apparatus detects response signal strength in real-time, compares it with preset thresholds, and immediately adjusts communication beam directions without requiring complex singular value decomposition calculations,从而实现 immediate beam pointing direction adjustment.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If multiple antennas are deployed to improve communication quality, then communication quality is improved, but hardware cost increases

Engineering Contradiction:

Improvecommunication qualityVSAvoidnumber of antennas

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts the essential function needed for communication quality maintenance (signal strength measurement) from the complex multiple-antenna system. Instead of using multiple antennas for beamforming and signal processing, the system uses a single RFID reader to detect response signal strength, extracting only the necessary measurement function while eliminating unnecessary hardware components.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces expensive, complex antenna arrays with simpler, more economical RFID readers. The RFID readers perform the essential function of detecting vehicle positions through response signal strength measurements at a lower hardware cost, making the system more economically viable while maintaining communication quality.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

The solution effectively reduces hardware costs and enhances communication quality by immediately adjusting communication beam pointing directions based on signal strength and identification information, improving positional tracking and communication efficiency for mobile vehicles.

Implementation Method 1

a first radio frequency identification reader detects a first response signal of a wireless identification tag of a first mobile vehicle to obtain first signal strength information

Methodology Applied

Scientific EffectRadio Frequency Identification (RFID):

Data Source

PatentUS11758413B2Roadside apparatus and communication beam pointing direction adjusting method thereof

Publication Date: 2023.09.12 PEGATRON

AI summary

A roadside apparatus and a communication beam pointing direction adjusting method thereof are provided. A first radio frequency identification reader detects a first response signal of a wireless identification tag of a first mobile vehicle to obtain first signal strength information. The first signal strength information corresponds to strength of the first response signal. A first roadside unit determines a position of the first mobile vehicle according to the first signal strength information, and directs a communication beam of the first roadside unit to the first mobile vehicle.