Hybrid V2X Control System Interface Segmentation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Legacy V2X systems lack efficient methods for distinguishing and managing communication interfaces for V2V and V2I messages, particularly in terms of message authentication, priority-based transmission frequency, and hybrid message control, which affects V2V safety and communication efficiency.

Innovation Solution

A hybrid V2X control system that processes transmission signals by dividing them into security credential messages (SCM) and V2V signals, using separate communication interfaces such as ITS-G5 and LTE-PC5 based on QoS parameters, and variably applying ITS-G5 and LTE-Uu interfaces depending on infrastructure presence to enhance V2V communication coverage and reduce latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a legacy V2X system uses a single communication interface for both V2V and V2I messages, then the system structure is simple, but the message authentication and priority-based transmission management become inefficient

Engineering Contradiction:

Improvesystem structureVSAvoidmessage authentication efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent segments the communication system into two distinct interfaces: a first interface (e.g., DSRC/ITS-G5) for V2V safety messages and a second interface (e.g., LTE/5G) for V2I infrastructure messages. This segmentation allows each interface to be optimized for its specific message type, improving authentication efficiency and priority management while maintaining clear system boundaries

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a message classification mechanism that acts as an intermediary between the two communication interfaces. This classifier determines which interface should handle each message based on its type (V2V or V2I), enabling efficient route selection and priority-based transmission without requiring complex integration between interfaces

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If transmission frequency is increased for all messages to ensure safety, then V2V safety is improved, but energy consumption and network congestion increase

Engineering Contradiction:

ImproveV2V safetyVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies different transmission frequencies and priorities to different message types and interfaces. V2V safety messages on the first interface use high-frequency transmission to ensure safety, while V2I messages on the second interface use lower frequencies. This local differentiation optimizes energy consumption while maintaining V2V safety requirements

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements dynamic priority assignment where the transmission frequency and interface selection adapt based on message importance, traffic conditions, and safety requirements. Critical V2V messages maintain high priority and frequency, while less critical V2I messages can use lower frequencies, creating a dynamic energy-efficient system

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If a hybrid communication system uses multiple interfaces for V2X messages, then communication coverage and flexibility are enlarged, but the complexity of managing and analyzing messages increases

Engineering Contradiction:

Improvecommunication coverageVSAvoidmessage control system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments message handling by interface type, with dedicated processing paths for first interface (V2V) and second interface (V2I) messages. This segmentation simplifies the management complexity by creating distinct handling routines for each interface type while still supporting hybrid communication capabilities

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #24Intermediary (Mediator)

4Device complexity

If security credential messages are transmitted through the same interface as V2V signals, then the system is simpler, but latency for V2V safety is increased

Engineering Contradiction:

Improveinterface managementVSAvoidV2V safety latency

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The patent segments security credential message transmission from V2V signal transmission by assigning SCM messages to the second interface (LTE/5G) while V2V safety messages use the first interface (DSRC/ITS-G5). This segmentation prevents SCM transmission from blocking or delaying critical V2V safety communications, reducing latency while maintaining security functionality

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11019520B2Mobile ITS station and method for operating mobile ITS station

Publication Date: 2021.05.25 LG ELECTRONICS INC

AI summary

A method of operating a mobile ITS (intelligent transport system) station including a hybrid V2X control system capable of supporting a first interface according to a first communication scheme and a second interface according to a second communication scheme at the same time is proposed.The mobile ITS station transmits transmission signals of the mobile ITS station via the first interface in a first traffic state. In this case, a second traffic state is distinguished from the first traffic state according to a traffic congestion level and whether or not an emergency situation occurs. The mobile ITS station transmits an SCM among the transmission signals of the mobile ITS station via the second interface in the second traffic state. The mobile ITS station transmits a signal other than the SCM among the transmission signals of the mobile ITS station via the first interface in the second traffic state.