Roadside Inductance Loops as Wireless Antennas
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Solution Overview
Problem
Existing wireless technologies face challenges in efficiently providing coverage and managing frequency spectrum usage, particularly in high-traffic areas like roads, where installation and maintenance of traditional antennas are costly and time-consuming, and frequency optimization is difficult due to shared spectrum usage.
Innovation Solution
Reusing existing inductance loops embedded in roads as antennas to create a roadside area network (RSAN) that activates and deactivates based on vehicle presence, leveraging high attenuation to provide short-range wireless connectivity using technologies like Bluetooth, Wi-Fi, or cellular networks, thereby reducing the load on macro cells and allowing for efficient spectrum reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antennas are installed to provide wireless coverage, then signal transmission and reception are improved, but installation time and cost increase
Solution Approach 1:
The inductance loop, originally designed solely for vehicle detection, is repurposed to serve dual functions: detecting vehicle presence and acting as an antenna for wireless signal transmission. This multi-functionality eliminates the need for separate antenna installations, thereby reducing installation time and cost while maintaining reliable wireless coverage.
Solution Approach 2:
The patent combines the vehicle detection function and wireless communication function into a single integrated system. The inductance loop structure serves both purposes simultaneously, merging two previously separate functions (detection and communication) into one unified infrastructure element.
2Reliability
If traditional antennas are installed to provide wireless coverage, then signal transmission is improved, but installation cost increases
Solution Approach 1:
The inductance loop is designed to perform multiple functions including vehicle detection and wireless signal transmission. By making the loop universal, the system eliminates the need for separate antenna infrastructure, thereby reducing material costs, installation labor costs, and maintenance expenses while ensuring reliable wireless signal transmission.
Solution Approach 2:
The inductance loop system utilizes its own existing structure and electrical connection to the roadway power system to provide wireless communication functionality. The loop serves itself by using its detection function's infrastructure to also support communication, eliminating the need for additional dedicated antenna installations and reducing overall system cost.
3Adaptability or versatility
If frequency spectrum is shared across multiple locations, then spectrum utilization is improved, but interference increases
Solution Approach 1:
The system activates the inductance loop antenna only during specific periods when a vehicle is detected on the roadway. This periodic activation based on vehicle presence creates dynamic spectrum sharing where the same frequency can be reused in different locations at different times, improving spectrum utilization while preventing interference by ensuring only one location transmits at any given moment.
Solution Approach 2:
The system uses vehicle detection feedback from the inductance loop to control antenna activation. When the loop detects a vehicle through changes in its electrical characteristics, it triggers the wireless communication function. This feedback mechanism ensures that spectrum is allocated based on actual demand, allowing efficient reuse of frequencies across different locations while preventing interference through coordinated activation.
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 enables cost-effective and efficient wireless network enhancements by minimizing installation efforts, reusing existing infrastructure, and optimizing spectrum usage, providing reliable connectivity for vehicles and reducing the overhead on macro cells, especially in high-traffic areas.
Implementation Method 1
The inductance loop sensor can sense the metal of the vehicle by very low frequency sympathetic oscillation
Implementation Method 2
a roadside system can measure inductance of an inductance loop associated with a road
Data Source
AI summary
Concepts and technologies disclosed herein are directed to wireless network enhancements via inductance loops as antennas. According to one aspect disclosed herein, a roadside system can measure inductance of an inductance loop associated with a road. The roadside system can determine whether the inductance of the inductance loop is greater than a baseline. If the inductance of the inductance loop is greater than the baseline, the roadside system can determine that a vehicle is positioned over the inductance loop and can utilize the inductance loop to activate a roadside area network. The roadside system can connect a user device to the roadside system via the roadside area network. The roadside system can include a connection to a network via a backhaul to enable communication between the user device and the network.