Selective Map Distribution for Autonomous Driving Cancel Points
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Solution Overview
Problem
Existing map data communication systems incur high costs due to increased data volume, which can lead to frequent interruptions in autonomous vehicle control, reducing user convenience and trust, and necessitate costly upgrades in communication devices.
Innovation Solution
A map server that receives cancel point reports from vehicles to identify difficult places, generating enhanced map data for these areas with increased detail, reducing the need for extensive data transmission by focusing on critical locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If map data with increased detail is provided for all areas, then autonomous vehicle control performance is improved, but communication cost increases
Solution Approach 1:
The patent applies local quality by providing enhanced map data only for difficult places (areas with complex road structures, intersections, junctions) while using standard map data for normal areas. This selective approach ensures high control performance where needed while minimizing overall data volume and communication costs.
Solution Approach 2:
The patent segments the map data into different levels of detail based on location characteristics. Difficult places receive detailed map data including precise road geometry, while normal areas receive simplified data, creating a segmented data distribution strategy that balances performance and cost.
2Quantity of substance
If communication data volume is reduced, then communication cost decreases, but frequency of interruptions in autonomous vehicle control increases
Solution Approach 1:
By providing detailed map data locally at difficult places, the system ensures continuous and reliable autonomous control at critical locations while reducing overall data transmission. This local enhancement prevents control interruptions where they are most likely to occur.
3Reliability
If detailed map data is provided for all areas, then autonomous vehicle control reliability is improved, but user convenience decreases due to cost
Solution Approach 1:
The patent enhances control reliability at difficult places through detailed local map data while avoiding unnecessary data transmission in normal areas, thereby reducing communication costs and maintaining user convenience without sacrificing critical control reliability.
4Reliability
If comprehensive map data is transmitted, then system reliability is improved, but communication device cost increases
Solution Approach 1:
The patent reduces communication device requirements by transmitting detailed map data only for difficult places rather than all areas. This selective data transmission lowers bandwidth requirements and communication infrastructure costs while maintaining system reliability at critical locations.
Data Source
AI summary
A map server includes a difficult place setting unit, a distribution map generation unit, and a distribution processing unit. The difficult place setting unit identifies, based on a cancel point report from a vehicle, a difficult place which is a point where vehicle control involving a driving support or automatic driving is highly likely cancelled. The distribution map generation unit generates, as a map of a difficult place area related to the difficult place, distribution maps respectively including map information denser than a map of a normal area that is an area other than the difficult place area. The distribution maps of the normal area, which does not include detailed map information, contributes to a reduction of data amount in an entire map distribution scheme, when, for example, distributing map data over the network.