Central Apparatus Map Generation Data Volume Reduction

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Solution Overview

Problem

The existing map generation system fails to adequately reduce communication data volume as it often transmits unnecessary information from mobile terminals to the central apparatus.

Innovation Solution

A central apparatus that communicates with mobile terminals, acquiring positional and measurement information, generating extraction information based on command information, and evaluating the completeness of map information to optimize data transmission, thereby reducing unnecessary data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If mobile terminals transmit all measurement information to the central apparatus, then the central apparatus can generate complete map information, but the communication data volume becomes excessively large

Engineering Contradiction:

Improvecompleteness of map informationVSAvoidcommunication data volume

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The central apparatus performs preliminary evaluation of map information completeness before receiving all measurement data. It generates command information in advance that specifies exactly which features need to be extracted and transmitted by mobile terminals, preventing unnecessary data transmission from occurring in the first place

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The central apparatus evaluates the completeness of map information and generates feedback in the form of command information that is transmitted back to mobile terminals. This feedback loop enables the system to iteratively refine which data should be transmitted, reducing communication volume while maintaining map information completeness

Inventive Principle:

Principle #23Feedback

2Quantity of substance

If mobile terminals extract information based on predetermined feature quantities, then communication data volume is reduced, but unnecessary information may still be transmitted

Engineering Contradiction:

Improvecommunication data volumeVSAvoidtransmission of unnecessary information

Core Design Contradiction:

Quantity of substanceVSLoss of information

Solution Approach 1:

The system transitions from static predetermined feature extraction to dynamic feature extraction guided by real-time completeness evaluation. The command information adapts based on the current state of map information, dynamically specifying which features need extraction and transmission at each stage

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The central apparatus changes the parameters of information extraction by evaluating map information completeness and generating command information that specifies updated extraction criteria. This parameter change ensures that only currently necessary features are extracted and transmitted, eliminating unnecessary data transmission

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20230160718A1Central apparatus, map generation system, and map generation method

Publication Date: 2023.05.25 MITSUBISHI ELECTRIC CORP

AI summary

A technique is provided with which it is possible to appropriately reduce communication data volume. A central apparatus communicates with a mobile terminal that is movable with a mobile body. The mobile terminal includes extraction-information generation means that generates extraction information by extraction from measurement information. The central apparatus includes map-information generation means that generates map information based on the extraction information transmitted from the mobile terminal to the central apparatus, and map generation control means that evaluates completeness of the map information generated by the map-information generation means and generates command information based on the completeness.