V2X Vehicle Spacing Control in Mixed Traffic Using Penetration Ratio
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently providing V2X services by configuring and determining control parameters related to autonomous driving based on the ratio of V2X vehicles and non-V2X vehicles.
Innovation Solution
A method and device for controlling V2X vehicles by calculating and transmitting a first message containing information on a first ratio based on the number of sensed adjacent vehicles and V2X vehicles, which includes parameters for controlling distance and separation between vehicles, using a road side unit (RSU) or SoftV2X server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2X communication is used to exchange information between vehicles, then vehicle coordination and safety are improved, but the system cannot effectively adapt to mixed traffic environments containing both V2X-equipped and non-V2X vehicles
Solution Approach 1:
The patent introduces a road side unit (RSU) or SoftV2X server as an intermediary entity that collects V2X message data from equipped vehicles and sensor data from all vehicles, processes this information to calculate penetration ratios, and provides this synthesized information to both V2X-equipped and non-V2X vehicles. This mediator enables effective communication and coordination in mixed traffic environments where direct vehicle-to-vehicle communication is not universally available.
Solution Approach 2:
The patent dynamically changes the parameter of communication mode based on the calculated penetration ratio. When the ratio of V2X-equipped vehicles is high, the system utilizes V2X communication for efficient direct coordination. When the ratio is low, the system switches to alternative communication methods or adjusts control parameters to account for the presence of non-V2X vehicles, thereby adapting to the prevailing traffic environment composition.
2Device complexity
If control parameters are configured without considering the ratio of V2X vehicles, then system complexity is reduced, but V2X service efficiency and autonomous driving performance deteriorate
Solution Approach 1:
The patent performs preliminary calculation of the penetration ratio by the RSU or SoftV2X server before vehicles execute autonomous driving maneuvers. This advance computation of traffic composition data allows vehicles to receive pre-processed information about the V2X penetration ratio in their environment, enabling them to adjust control parameters appropriately without performing complex real-time calculations, thus balancing system complexity with service efficiency.
3Productivity
If the system assumes all vehicles are V2X-equipped, then communication efficiency is maximized, but safety and coordination fail when non-V2X vehicles are present
Solution Approach 1:
The patent implements a feedback mechanism where the RSU or SoftV2X server continuously monitors the traffic environment, calculates the penetration ratio of V2X-equipped vehicles, and provides this feedback information to vehicles. This feedback loop enables the system to dynamically adjust its assumptions and control strategies based on the actual composition of the traffic environment, ensuring both communication efficiency and safety by adapting to the presence or absence of V2X-capable vehicles.
Data Source
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AI summary
According to various embodiments, disclosed are a method for controlling driving of a V2X vehicle by a first device in a wireless communication system supporting sidelink, and a device therefor. Disclosed are a method for controlling driving of a V2X vehicle, and a device therefor, the method comprising the steps of: sensing surrounding vehicles through a sensor; periodically receiving a V2X message from each of V2X vehicles; and transmitting a first message including information on a first ratio calculated on the basis of the V2X message and a result of the sensing, wherein the first ratio is calculated on the basis of the number of the sensed surrounding vehicles and the number of the V2X vehicles identified by means of the V2X message, and the first message further includes information on a first time gap for controlling an interval between the V2X vehicles configured on the basis of the first ratio.