Dual-Storage Navigation System Background Map Updates

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Solution Overview

Problem

Existing navigation systems require stopping navigation functions for updates, making it inconvenient, especially for short trips, and are limited in updating with power after the engine is stopped, and lack redundancy for continuous operation if one storage medium fails.

Innovation Solution

A navigation system with two storage media, where one media operates the system while the other performs background updates using differential data from an update server, even after the engine is stopped, and allows seamless switching if one medium fails.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If navigation functions are stopped to perform map data updates, then update completeness is improved, but navigation service continuity deteriorates

Engineering Contradiction:

Improveupdate completenessVSAvoidnavigation service continuity

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The navigation system divides storage media into two separate modules: a first storage module that maintains the current operational map data and a second storage module that receives and stores updated map data. This segmentation allows the system to perform updates in the second storage module without interrupting navigation services that continue to operate using data from the first storage module.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs map data updates in advance by downloading differential data to the second storage module before the navigation function needs to use the updated data. The control unit automatically switches to the updated second storage module when the differential data reception is complete, ensuring updates are ready beforehand without disrupting service.

Inventive Principle:

Principle #10Preliminary action

2Use of energy by moving object

If updates are performed only when the engine is running, then power availability is improved, but update opportunity is worsened

Engineering Contradiction:

Improvepower availabilityVSAvoidupdate opportunity

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The control unit is configured to receive differential data from the update server and store it in the second storage module even when the engine is not running, utilizing stored power or alternative power sources. This allows the system to perform updates at convenient times regardless of engine state, eliminating the constraint that updates must occur only when the engine is running.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If a single storage medium is used, then device complexity is reduced, but system reliability deteriorates

Engineering Contradiction:

Improvestorage structure simplicityVSAvoidsystem continuity

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The storage unit is divided into two independent storage modules, each capable of storing complete map data. This segmentation provides redundancy: if one storage module fails or contains outdated data, the navigation system can switch to the other module, ensuring continuous operation and improved system reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system maintains a backup storage module (second storage module) that receives updated data in advance. This creates a cushion against potential failures or data corruption in the primary storage module, as the control unit can switch to the backup module when needed, ensuring uninterrupted navigation service.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Manufacturing precision

If the navigation system waits for complete update files, then update accuracy is improved, but update speed deteriorates

Engineering Contradiction:

Improveupdate accuracyVSAvoidupdate speed

Core Design Contradiction:

Manufacturing precisionVSSpeed

Solution Approach 1:

The system receives and processes differential data in partial increments rather than waiting for complete update files. The control unit can switch to the second storage module as soon as sufficient differential data is received and stored, even if the complete update package is not yet fully downloaded, thereby improving update speed while maintaining adequate update accuracy.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS10119828B2Device, method and update server for automatically updating navigation system

Publication Date: 2018.11.06 HYUNDAI AUTOEVER

AI summary

An automatic navigation-system update device includes a storage unit including a first storage module and a second storage module each of which stores map data and map version information; a communication unit configured to transmit the map version information extracted from the storage unit to an update server and to receive, from the update server, differential data of map data based on a difference between the map version information and latest map version information; and a control unit. The control unit guides a route on the basis of the map data stored in the first storage module and to update the map data stored in the second storage module by reflecting the differential data.