Selective V2V Message Forwarding for Channel Congestion

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Solution Overview

Problem

Current vehicle-to-vehicle (V2V) and vehicle-to-everything (V2X) communication systems face challenges with limited bandwidth and data rate, leading to channel congestion and reduced quality of service, especially in autonomous driving scenarios, where efficient message forwarding is crucial for safety but is hindered by the limitations of IEEE 802.11p and the increasing data demands.

Innovation Solution

A method for selective message forwarding in V2V communication, where a control unit of a transportation vehicle receives and compares hazard-related messages with information about other vehicles, determining whether to transmit based on geolocation, vehicle type, and other criteria to optimize channel use and reduce redundant transmissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If V2V communication is used to disseminate hazard information, then safety and awareness are improved, but channel congestion and data overhead increase

Engineering Contradiction:

ImprovesafetyVSAvoiddata overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent applies local quality by making the message forwarding decision context-dependent. Each vehicle evaluates its own situation (whether it has already received the hazard message) before deciding to forward. This selective forwarding based on local conditions reduces overall data overhead while maintaining safety awareness where needed.

Inventive Principle:

Principle #3Local quality

2Loss of information

If hazard messages are forwarded to all vehicles, then information dissemination is improved, but redundant transmissions and channel congestion increase

Engineering Contradiction:

Improveinformation disseminationVSAvoidchannel usage

Core Design Contradiction:

Loss of informationVSLoss of energy

Solution Approach 1:

The patent implements feedback by having vehicles monitor whether they have already received hazard messages before forwarding. This feedback mechanism prevents redundant transmissions by checking the current state of message reception, thereby reducing channel congestion while ensuring complete information dissemination to all affected vehicles.

Inventive Principle:

Principle #23Feedback

3Reliability

If message forwarding is restricted to reduce congestion, then channel quality is improved, but information dissemination to distant vehicles is reduced

Engineering Contradiction:

Improvechannel qualityVSAvoidcoverage area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent applies segmentation by dividing the message propagation process into multiple hops through intermediate vehicles. Instead of requiring direct transmission to all distant vehicles, the hazard information is segmented and relayed through a chain of vehicles, maintaining channel quality while extending coverage area to distant vehicles.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11381953B2Method for vehicle-to-vehicle communication

Publication Date: 2022.07.05 VOLKSWAGEN AG

AI summary

A method of a first transportation vehicle for vehicle-to-vehicle (V2V) communication, which includes receiving a first message from a remote transmitter having first information on a hazard related to a first geolocation indicated in the first message; determining second information on a second transportation vehicle; and comparing the first information and the second information and selectively transmitting a forwarded message based on the content of the first message to the second transportation vehicle based on the comparison of the first and the second information.