Vehicle Platooning Communication Thresholds for Packet Loss
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Solution Overview
Problem
Current manual vehicle following methods are unsafe and inefficient, failing to achieve significant fuel savings and safety benefits due to drivers' inability to maintain optimal headway and causing rapid accelerator pedal position changes, leading to inefficient driving.
Innovation Solution
Establishing a communication link between vehicles to manage platooning engagements by measuring packet transmission and reception quality, adjusting packet loss thresholds based on distance to ensure safe and efficient following, and using redundant systems to determine actions such as starting or dissolving a platoon.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If vehicles follow closely together to achieve fuel savings, then fuel efficiency is improved, but safety deteriorates when under driver control
Solution Approach 1:
The patent replaces manual mechanical control with automated electronic control systems. The automated vehicle control system uses electronic sensors, processors, and actuators to control the following vehicle's speed and position, substituting the driver's mechanical pedal control with electronic automation that can safely maintain close following distances while achieving fuel savings.
Solution Approach 2:
The system dynamically changes the following distance parameter based on operating conditions. By automatically adjusting the headway distance between vehicles according to speed, road conditions, and traffic flow, the system enables close following for fuel efficiency when safe, while maintaining larger safety margins when conditions require it.
2Loss of energy
If drivers manually maintain close following distance, then fuel efficiency is improved, but driving comfort deteriorates due to rapid accelerator pedal position changes
Solution Approach 1:
The patent replaces the driver's manual mechanical control of the accelerator pedal with an automated electronic control system. This automation eliminates the rapid, jerky pedal movements that cause discomfort, while maintaining the close following distance needed for fuel efficiency through smooth, computer-controlled acceleration and deceleration.
Solution Approach 2:
The system dynamically adjusts acceleration and deceleration rates to provide smooth transitions. Rather than making abrupt changes in accelerator pedal position, the automated system modulates these changes over time to maintain comfort while achieving efficient following distances, adapting to driver preferences and road conditions.
3Reliability
If automated systems control vehicle speed to maintain constant headway, then safety is improved, but system complexity increases
Solution Approach 1:
The patent integrates multiple functions into existing vehicle systems. The automated vehicle control system leverages existing sensors (cameras, radar, LIDAR), processors, and actuators already present in modern vehicles, combining them into a unified platooning control system that performs safety monitoring, distance maintenance, and communication coordination without requiring entirely new hardware.
Solution Approach 2:
The system uses communication packets as intermediaries to coordinate between vehicles. Rather than requiring complex direct vehicle-to-vehicle control links, the patent employs standardized communication protocols and data packets to exchange information about position, speed, and intent, simplifying the control architecture while maintaining safety.
4Stability of the object's composition
If communication link quality is monitored to manage platooning, then platoon stability is improved, but communication system complexity increases
Solution Approach 1:
The patent implements feedback monitoring of communication link quality using standard communication protocols. The system continuously assesses packet transmission success rates and communication latency, using this feedback to determine whether to maintain or dissolve the platoon. This approach provides stable platoon management through simple binary decisions based on communication quality thresholds.
Data Source
AI summary
Systems and methods for increasing the efficiency of vehicle platooning systems are described. In one aspect, drivers are more likely to enjoy a system if it begins platooning as desired and does not accidently end platoons. When a certain amount of data packets sent between vehicles are dropped, systems typically will either not engage in a platoon or end a current platoon. When a platoon has a very small gap between vehicles, the platoon should end—or not start, when a certain amount of packets are dropped. However, if a gap is large enough to provide a driver with more time to react, a system may accept a greater amount of dropped packets before it refuses to start a platoon or causes the end of a platoon.