Lane Change Decision Logic With Personalized Longitudinal Speed Control

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Solution Overview

Problem

Current lane change decision-making technologies in autonomous driving face challenges such as complex logic, difficulty in reflecting passenger preferences, and a failure to balance safety and efficiency, particularly in rule-based systems, while learning-based systems are not ready for mass production due to data restrictions and black-box system security.

Innovation Solution

A lane change decision-making method that integrates longitudinal control to formulate an autonomous lane change policy, allowing users to set personalized speed preferences and thresholds, and assess lane change feasibility based on relative speeds, distances, and motion parameters to ensure safe and efficient lane changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If rule-based lane change decision-making is used, then the system is ready for mass production, but the logic becomes complex and fails to reflect passenger preferences

Engineering Contradiction:

Improvereadiness for mass productionVSAvoiddecision-making logic complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent transforms the complex rule-based decision-making logic into a parameter-driven approach. By defining lane change conditions through quantitative parameters (relative speed thresholds, distance thresholds, acceleration limits) rather than complex logical rules, the system maintains simplicity while being ready for mass production. The controller executes straightforward parameter comparisons instead of complex logical evaluations.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If rule-based lane change decision-making is used, then the system is ready for mass production, but the ability to reflect passenger preferences is reduced

Engineering Contradiction:

Improvereadiness for mass productionVSAvoidpassenger preference adaptation

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent introduces dynamic adaptability by allowing the expected speed parameter to be adjusted based on passenger preferences. The system can adapt to different driving styles (conservative vs. aggressive lane changing) by modifying the expected speed threshold, enabling the same hardware platform to serve different user needs without sacrificing mass production readiness.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If learning-based lane change decision-making is used, then passenger preferences can be reflected, but data restrictions and black-box system security prevent mass production

Engineering Contradiction:

Improvepassenger preference reflectionVSAvoidreadiness for mass production

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent replaces the learning-based artificial intelligence system with a deterministic control algorithm based on classical control theory. By substituting the black-box learning model with a transparent mathematical model (PID controller with parameter adjustments), the system achieves both mass production readiness and the ability to reflect passenger preferences through adjustable parameters, eliminating security and data concerns.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Device complexity

If lane change decision-making does not consider longitudinal control, then the decision process is simpler, but safety and efficiency are compromised

Engineering Contradiction:

Improvedecision-making process complexityVSAvoidlane change safety

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent merges lane change decision-making with longitudinal control into a unified decision framework. By combining lateral lane change intentions with longitudinal speed and acceleration considerations, the system ensures that lane changes are executed only when both lateral and longitudinal conditions are safe, improving reliability without excessive complexity through integrated parameter evaluation.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP4501729B1Lane changing decision-making method, device and storage medium

Publication Date: 2025.11.12 YINWANG INTELLIGENT TECHNOLOGIES CO LTD

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AI summary

A lane change decision-making method and apparatus, and a storage medium are provided, and relate to the field of autonomous driving technologies. The method may be applied to the fields of intelligent vehicles, new energy vehicles, and the like, and includes: on a first lane on which a target vehicle is located, obtaining longitudinal traveling information of the target vehicle when there is a first obstacle in front of the target vehicle (201); and performing lane change when the longitudinal traveling information meets a preset lane change condition, where the preset lane change condition includes: a first relative speed is less than zero and a second relative speed is less than zero, where the first relative speed is a relative speed between a first speed and a set first expected speed, and the second relative speed is a relative speed between the first speed and a second expected speed (202). According to the method, an intelligent vehicle can fully and intuitively reflect an intent and a preference of a user when satisfying safety, to implement personalized setting of a lane change frequency, and improve lane change decision-making performance.