Roadside Unit Data Upload Resumption Logic

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Solution Overview

Problem

In Intelligent Transport Systems, when communication disconnection occurs between an on-board unit and a roadside unit, data re-uploading may fail due to mismatched data volumes, preventing appropriate data upload to a server.

Innovation Solution

A roadside unit with communication and control circuitry that suspends upload resume requests to the server during data transfer, adjusts transmission intervals, and handles re-upload information to ensure accurate data resumption after reconnection, allowing for appropriate data uploading from the on-board unit to the server.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the on-board unit performs data re-uploading after communication disconnection, then data can be resent, but data volume mismatch occurs between transmitted and transferred data

Engineering Contradiction:

Improvedata upload reliabilityVSAvoiddata volume consistency

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The roadside unit performs preliminary actions by suspending the transfer of upload resume requests to the server before data transfer completion, and by notifying the on-board unit of transfer status. This prevents data volume mismatch by ensuring the on-board unit only resumes uploading when the server is ready to receive the complete data set.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where the roadside unit notifies the on-board unit of data transfer status (in-progress or completed). This feedback loop allows the on-board unit to adjust its re-uploading behavior based on actual server reception status, preventing data volume inconsistency.

Inventive Principle:

Principle #23Feedback

2Loss of time

If the upload resume request is transferred immediately to the server, then response time is reduced, but data inconsistency may occur when data transfer is in progress

Engineering Contradiction:

Improveupload resumption timeVSAvoiddata consistency

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The roadside unit performs preliminary status checking and suspends transfer of upload resume requests before the server completes data reception. This preliminary action prevents inconsistent states while maintaining efficient resumption by only delaying when necessary.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the handling of upload resume requests based on real-time data transfer status. When transfer is complete, requests are processed immediately; when in-progress, requests are suspended. This dynamic behavior optimizes both response time and data consistency.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20230005303A1Roadside unit, on-board unit, communication system, and communication method

Publication Date: 2023.01.05 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

Provided is a roadside unit including: communication circuitry, which, in operation, receives data transmitted from an on-board unit and transfers the data to a server; and control circuitry, which, in operation, suspends, in a case where the communication circuitry has received an upload resume request for the data from the on-board unit while the data is being transferred to the server, transfer of the upload resume request to the server.