Selective V2X Broadcast Acknowledgment for Obstacle-Aware Vehicle Messaging

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Solution Overview

Problem

Existing wireless vehicular communication systems face inefficiencies in selecting broadcast acknowledgers due to environmental obstacles, leading to delayed and inefficient acknowledgment processes, which jeopardize the effectiveness of safety-critical applications like collision avoidance and lane merging.

Innovation Solution

Introduce an acknowledger selector, a stationary or mobile entity equipped with V2X communication and local sensors, to dynamically select relevant vehicles for broadcast acknowledgments based on vehicle-specific relevance checks, using algorithms to anticipate and update acknowledger lists.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If selective broadcast acknowledgment is implemented, then reliability of message reception is improved, but coordination complexity increases

Engineering Contradiction:

Improvemessage reception reliabilityVSAvoidcoordination complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces an acknowledger selector as an intermediary entity that mediates between the transmitting vehicle and potential acknowledger vehicles. This selector automatically identifies suitable acknowledgers and coordinates their selection, thereby maintaining high message reception reliability while reducing the coordination complexity that would otherwise burden the transmitting vehicle and all potential receivers.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If ACKs are requested from all receivers, then message reception reliability is improved, but communication efficiency deteriorates

Engineering Contradiction:

Improvemessage reception reliabilityVSAvoidcommunication efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Instead of requesting acknowledgments from all receiving vehicles, the patent applies partial action by selecting only a specific subset of vehicles as acknowledgers. The acknowledger selector identifies and designates particular vehicles that are most suitable for providing acknowledgments based on their reception capability and relevance to the transmission, thereby maintaining reliable message confirmation while reducing the excessive communication overhead that would result from universal acknowledgment requests.

Inventive Principle:

Principle #16Partial or excessive action

3Device complexity

If direct V2V communication is used for acknower selection, then system simplicity is maintained, but selection timeliness deteriorates due to environmental obstacles

Engineering Contradiction:

Improvesystem simplicityVSAvoidacknower selection delay

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #24Intermediary (Mediator)

4Reliability

If multiple retransmissions are performed, then message delivery reliability is improved, but transmission time increases

Engineering Contradiction:

Improvemessage delivery reliabilityVSAvoidtransmission time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by proactively selecting and designating acknowledgers before the actual message transmission occurs. The acknowledger selector identifies suitable vehicles in advance and prepares them to provide acknowledgments, so that when the message is transmitted, the acknowledgment process can proceed immediately without delay. This preliminary preparation reduces the need for multiple retransmissions and associated time losses.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements a feedback mechanism where selected acknowledgers send confirmation signals back to the transmitting vehicle to indicate successful message reception. This feedback loop allows the transmitting vehicle to verify delivery reliability efficiently and only initiate retransmissions when truly necessary, thereby maintaining high reliability while minimizing unnecessary transmission time consumption.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12507042B2Method and system for selective broadcast acknowledgment in wireless vehicular communication

Publication Date: 2025.12.23 HYUNDAI MOTOR CO LTD

AI summary

A method and a system for selective broadcast acknowledgment in wireless vehicular communication are disclosed. According to a method, a computing device may receive wireless messages from vehicles, store information based on the received wireless messages, determine, for a pair of vehicles, whether information from one vehicle of the pair of vehicles is relevant to operation of a vehicle application being executed on another vehicle of the pair of vehicles, and compile acknowledger lists. Each acknowledger list may indicate, for a respective vehicle, one or more vehicles that are verified as being relevant to the respective vehicle. The computing device may transmit the acknowledger lists to the vehicles, and cause the vehicles to perform a selective broadcast acknowledgement process based on the acknowledger lists.