Onboard Device Prioritizing Probe Data Transmission

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Solution Overview

Problem

Existing systems for transmitting probe data from vehicles to a data center do not prioritize data based on urgency, leading to potentially critical high-urgency data being delayed behind lower-urgency data.

Innovation Solution

An onboard device with an electronic control unit that classifies probe data by urgency and a communication unit that transmits higher-priority data before lower-priority data to ensure timely receipt at the data center, utilizing various communication lines such as mobile phone, wireless LAN, and wired LAN to optimize transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If probe data is transmitted without priority classification, then all data can be transmitted using the same communication resources, but high-urgency probe data may be delayed behind low-urgency data

Engineering Contradiction:

Improvetimely receipt of high-urgency probe dataVSAvoidtransmission delay of critical data

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The probe data is segmented into multiple priority levels (first priority for high urgency, second priority for normal urgency, third priority for low urgency). This segmentation allows the system to differentiate and handle critical data separately from non-critical data, ensuring that high-urgency probe data is transmitted before lower-priority data without requiring complete retransmission protocols.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary classification of probe data into priority levels before transmission. By pre-categorizing data as first, second, or third priority based on urgency, the communication unit can immediately transmit high-priority data when available, preventing delays that would occur if all data were treated equally and processed in arbitrary order.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If multiple communication lines are used for probe data transmission, then communication stability is improved, but system complexity increases

Engineering Contradiction:

Improvecommunication stabilityVSAvoidcommunication system configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The communication unit is designed with multi-functionality to support multiple communication lines (mobile phone line, wireless LAN, wired LAN) within a single integrated component. This allows the system to utilize diverse communication channels for improved stability and weather resistance without requiring separate dedicated systems for each communication type, thereby managing complexity while maintaining reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system dynamically changes communication parameters by selecting different communication lines based on environmental conditions and data priority. When wired LAN is available and weather conditions are favorable, it is selected for stable transmission; when mobility is required or weather deteriorates, the system switches to wireless options. This parameter adaptation improves reliability without permanently increasing system complexity.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10924428B2Onboard device and method of transmitting probe data

Publication Date: 2021.02.16 TOYOTA JIDOSHA KK

AI summary

An onboard device includes an electronic control unit configured to set priorities depending on a classification of probe data, and a communication unit configured to transmit, prior to probe data having a lower priority among the probe data, probe data having a higher priority among the probe data to a data center.