Map Update Server for Vehicle Travel Control Assistance
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Solution Overview
Problem
Existing vehicle travel control assistance systems face challenges in maintaining consistency and timely updates of high-precision map data across multiple assistance server apparatuses, especially in dynamic environments with changes like construction work, accidents, or temporary road conditions, which disrupts optimal travel control assistance.
Innovation Solution
A vehicle travel control assistance system with a map update function that includes assistance server apparatuses and a map update server, where high-precision map data is updated simultaneously using narrow-area and wide-area data, with interpolation and unserviceability settings to ensure consistency, allowing for continuous assistance even during updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple assistance server apparatuses update high-precision map data separately and sequentially, then each server can be updated independently, but consistency of map data across servers cannot be ensured
Solution Approach 1:
The patent merges the update operations of multiple assistance servers by introducing a central map management server that coordinates updates across all servers. The master copy of map data is maintained centrally, and all assistance servers synchronize their copies from this central source, ensuring consistency while allowing independent update execution.
Solution Approach 2:
The map management server acts as an intermediary between the map data production server and multiple assistance servers. It receives updated map data, manages the master copy, and distributes synchronized copies to all assistance servers, mediating the update process to ensure consistency across the distributed system.
2Measurement precision
If map data is updated frequently to reflect dynamic road conditions, then data accuracy improves, but service interruptions increase
Solution Approach 1:
The system performs preliminary actions by maintaining a master copy of map data at the map management server before distributing it to assistance servers. Updates are prepared and validated centrally, then synchronized to all servers in a coordinated manner, preventing service interruptions during the update process itself.
Solution Approach 2:
The patent ensures continuous service availability by implementing a update mechanism where assistance servers can continue operating with their current map data copies while the central server updates the master copy. Synchronization occurs without forcing service interruptions, maintaining continuous useful action.
3Speed
If multiple assistance servers hold separate copies of high-precision map data, then data access speed improves, but update synchronization becomes difficult
Solution Approach 1:
The patent segments the map data system into a central management component (map management server holding master copy) and distributed access components (multiple assistance servers holding working copies). This segmentation allows local fast access while centralizing the synchronization management function.
Solution Approach 2:
The system implements feedback mechanisms where assistance servers report their map data version status to the map management server, which then coordinates synchronization. This feedback loop automates the synchronization process, reducing the complexity of keeping multiple server copies consistent.
Data Source
AI summary
A travel control assistance system for a vehicle includes assistance server apparatuses, and a map update server apparatus. The assistance server apparatuses generate data that assists in a travel control of the automobile, based on respective pieces of high-precision map data and transmit the data to the automobile. The map update server apparatus updates the high-precision map data held in the assistance server apparatuses. The high-precision map data held in the assistance server apparatuses include narrow-area high-precision map data and wide-area high-precision map data regarding a wide area including an area for the narrow-area high-precision map data. The narrow-area high-precision map data is held in the low-order assistance server apparatus. The wide-area high-precision map data is held in the high-order assistance server apparatus. The map update server apparatus updates the narrow-area high-precision map data and the wide-area high-precision map data based on common data.