V2X Message Relay Using Vehicle Angle to Prevent Broadcast Flooding

Solution Overview

Problem

The challenge of efficiently transmitting collective perception messages in V2X systems, particularly in urban environments with infrastructure blockages and remote areas, while preventing an infinite flood of information during relay transmission.

Innovation Solution

An electronic device and method that determines whether to relay collective perception messages based on the relative angles of transmitting and receiving vehicles, generating new messages only when vehicles are moving in the same direction, thereby preventing unnecessary relays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If relay transmission is performed to transmit information to remote devices, then the transmission range is extended, but information flooding occurs causing infinite repetition of messages

Engineering Contradiction:

Improvetransmission rangeVSAvoidinformation volume

Core Design Contradiction:

Length of stationary objectVSQuantity of substance

Solution Approach 1:

The patent applies local quality by making each relay device's transmission behavior dependent on its local directional relationship with the source device. Each device independently determines whether to relay based on whether it lies within the directional range of the source device, creating localized quality control that prevents global information flooding while enabling targeted range extension.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent inverts the conventional relay approach by instead of always relaying or using complex routing protocols, it only relays when the directional condition is met. This inversion transforms the problem from managing information flow through complex control to a simple geometric condition check, effectively preventing information flooding while maintaining range extension.

Inventive Principle:

Principle #13The other way round (Inversion)

2Loss of information

If collective perception messages are broadcast through V2X sidelink to expand cognitive range, then environmental awareness is improved, but network congestion and information overflow occur

Engineering Contradiction:

Improvecognitive rangeVSAvoidmessage volume

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent applies local quality by making each relay device's transmission behavior dependent on its local directional relationship with the source device. Each device independently determines whether to relay based on whether it lies within the directional range of the source device, creating localized quality control that prevents global information flooding while enabling targeted range extension.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent applies partial action by having each device perform only a specific function (relaying when within directional range) rather than all devices performing all possible relays. This partial action approach reduces the total message volume in the network while still achieving the goal of expanding cognitive range through selective relaying.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If unlimited relay transmission is performed, then information reaches all remote devices, but system resource consumption increases due to infinite message repetition

Engineering Contradiction:

Improveinformation deliveryVSAvoidsystem resource consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent inverts the conventional relay approach by instead of always relaying or using complex routing protocols, it only relays when the directional condition is met. This inversion transforms the problem from managing information flow through complex control to a simple geometric condition check, effectively preventing information flooding while maintaining range extension.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent applies self-service by enabling each relay device to autonomously determine whether to forward messages based on its own directional relationship with the source device. Each device independently evaluates the angular condition and makes its own relay decision without requiring complex network-wide coordination or additional control messages, thereby reducing system resource consumption.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12609724B2Electronic device and message transmission method for V2X system

Publication Date: 2026.04.21 HON HAI PRECISION INDUSTRY CO LTD

AI summary

An electronic device, applicable to a V2X system is disclosed. The electronic device includes a wireless transceiver and a processor. The wireless transceiver is configured to receive a first collective perception message from another device of the V2X system. The processor is coupled to the wireless transceiver, and the processor is configured to operate the following operations: determining whether to generate a second collective perception message according to the first collective perception message according to a first angle of the electronic device and a second angle of another device of the first collective perception message; and sending the second collective perception message to several surrounding devices surrounding the electronic device through the wireless transceiver.