Ad-Hoc Network Traffic Data Collection via Vehicle Registration

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Solution Overview

Problem

Conventional road traffic information systems using Dedicated Short Range Communication (DSRC) require additional detectors and increase network load when roadside equipment (RSE) requests driving information from vehicles, leading to higher production costs and network congestion.

Innovation Solution

Creating an ad-hoc network between vehicles and RSE using vehicle registration messages to collect and transmit road traffic information, allowing RSE to receive and manage these messages to form the network and collect data without additional devices, thereby reducing network load.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If detectors are added to RSE or installed on the road to collect road traffic information, then road traffic information collection capability is improved, but device complexity and production cost increase

Engineering Contradiction:

Improveroad traffic information collection capabilityVSAvoidRSE complexity and production cost

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

Vehicles perform self-identification and information broadcasting without requiring external detectors. Each vehicle uses its own onboard equipment to generate and transmit registration messages containing driving information, eliminating the need for additional detectors on RSE or road infrastructure.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent introduces an intermediary mechanism where vehicles broadcast their registration messages to RSE through wireless communication. This intermediary approach allows information collection without direct physical detection devices on the road or RSE, using vehicles themselves as the information source.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of information

If RSE requests driving information from vehicles to collect road traffic information, then road traffic information collection capability is improved, but network load increases

Engineering Contradiction:

Improveroad traffic information collection capabilityVSAvoidnetwork load

Core Design Contradiction:

Loss of informationVSLoss of energy

Solution Approach 1:

Vehicles broadcast their registration messages containing driving information proactively before RSE needs to request it. This preliminary action of information broadcasting by vehicles eliminates the need for RSE to send requests, thereby reducing network load while ensuring information availability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of RSE actively requesting information from vehicles (push model), the patent inverts the approach by having vehicles passively broadcast their information (pull model). This inversion shifts the initiation of communication from RSE to vehicles, reducing network load and improving information collection efficiency.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS7430218B2Apparatus and method for providing users with road traffic information using ad-hoc network

Publication Date: 2008.09.30 SAMSUNG ELECTRONICS CO LTD

AI summary

A traffic information service apparatus using an ad-hoc network and a method for controlling the same. The apparatus provides an ad-hoc network between vehicles and roadside devices, and collects/provides traffic information using the ad-hoc network. The method for providing a user with traffic information, comprising the steps of a) allowing vehicles to broadcast their registration messages to create an ad-hoc network, and creating the ad-hoc network between the vehicles on the basis of the registration messages, b) allowing a Road Side Equipment (RSE) to receive the registration messages broadcast from the vehicles, and collecting traffic information from the registration messages, and c) allowing the RSE to transmit the traffic information to a traffic information service center.