Dynamic Wireless Transmitting Power Control for Vehicular Safety
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Solution Overview
Problem
Conventional wireless transmitting power control methods are inadequate for cooperative vehicular safety technology, leading to inefficient wireless frequency usage and increased signal interference and packet collisions in heavy traffic or crowded areas, as they do not account for vehicle speed, network topology changes, and traffic density.
Innovation Solution
A dynamic wireless transmitting power control system for vehicles that adjusts transmitting power levels based on real-time traffic conditions using a lookup table and thresholds to optimize power usage and reduce interference, by periodically calculating the number of surrounding vehicles and adjusting power levels accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the largest transmitting power is used to send information in cooperative vehicular safety technology, then the effective transmission range is extended, but the wireless frequency usage efficiency deteriorates and signal interference and packet collisions increase in heavy traffic or crowded areas
Solution Approach 1:
The patent implements dynamic transmitting power adjustment by continuously monitoring traffic density and vehicle distribution within the transmission area. The base station periodically receives vehicle position information, calculates the number of vehicles in the service area, and adjusts the transmitting power level accordingly. This transforms the static maximum power transmission into a dynamic control system that adapts to real-time traffic conditions, resolving the contradiction between maintaining transmission range and improving frequency efficiency.
Solution Approach 2:
The system changes the transmitting power parameter based on calculated traffic density. When the number of vehicles in the transmission area exceeds a predetermined threshold, the base station reduces the transmitting power level; when the vehicle count is below the threshold, it increases or maintains maximum power. This parameter adjustment mechanism allows the system to optimize wireless frequency usage while ensuring adequate coverage for safety-critical communications.
2Area of stationary object
If the largest transmitting power is used to send information, then the transmission coverage is maximized, but the signal interference and packet collisions increase in heavy traffic areas
Solution Approach 1:
The patent establishes a feedback loop where the base station continuously monitors the transmission environment by receiving vehicle position information and calculating traffic density. Based on this feedback, the system dynamically adjusts the transmitting power to prevent excessive interference and packet collisions. When vehicle density is high, the reduced power level minimizes interference; when density is low, maximum power ensures adequate coverage without causing unnecessary interference.
3Device complexity
If conventional transmitting power control is used in cooperative vehicular safety technology, then the implementation is simple, but it cannot adapt to vehicle speeding, network topology changes, and traffic density variations
Solution Approach 1:
The base station performs self-adjustment of transmitting power by autonomously calculating traffic density based on vehicle position information it already receives for other purposes. The system uses its existing computational resources to monitor the number of vehicles in the transmission area and automatically adjusts power levels without requiring external control or complex additional hardware, achieving adaptability while maintaining relatively simple system architecture.
Data Source
AI summary
The present disclosure relates to a method and system of dynamic wireless transmitting power control for a vehicle. The system of wireless transmitting power control comprises: a receiving unit, a state unit, a storing unit, a caution unit, a transmitting power decision unit and a transmitting unit. Accordingly, the system of dynamic wireless transmitting power control periodically adjusts a transmitting power level according to the number of driving vehicles so as to adjust transmission radius, decrease transmission interferences and accidents among cars and increase efficiency of wireless frequency usage.