Map management system

Patent metadata

Field	Value
Publication number	US-12499104-B2
Application number	US-202418597003-A
Country	US
Kind code	B2
Filing date	Mar 6, 2024
Priority date	Apr 12, 2023
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A map management system includes a plurality of servers that manage map data of a predetermined area. The plurality of servers each include: a storage that records a block chain; and a processor that stores, in the block chain, map update data for updating the map data, the map update data being generated based on data collected from a plurality of vehicles traveling in the area. The processor conducts verification of whether or not a plurality of pieces of map update data satisfy a predetermined verification policy by using a framework of the block chain, and updates the map data by selectively using map update data determined, as a result of the verification, as satisfying the verification policy and thus being valid, among the plurality of pieces of map update data.

First claim

What is claimed is:

1 . A map management system comprising
a plurality of servers that manage map data of a predetermined area, the plurality of servers each comprising:
a storage that stores a block chain; and
a processor that stores, in the block chain, a plurality of pieces of map update data for updating the map data, the plurality of pieces of map update data being generated based on vehicle data from a plurality of vehicles traveling in the predetermined area, wherein
the processor
updates the map data by selectively using map update data determined, by executing a verification process of map update data defined in a smart contract implemented using a framework of the block chain, as satisfying a predetermined verification policy and thus being valid, among the plurality of pieces of map update data, and
generates a map with the map update data,
the verification process is determined based on a number of the plurality of vehicles from which the vehicle data is acquired, and a matching ratio of the plurality of pieces of map update data, all of the plurality of pieces of map update data is stored in the block chain regardless of whether or not the plurality of pieces of map update data are valid, the plurality of servers comprise a cloud server and a plurality of edge servers, and the plurality of edge servers each generate the plurality of pieces of map update data based on the vehicle data collected from the plurality of vehicles, and broadcast transaction data including the plurality of pieces of map update data to share the plurality of pieces of map update data between the cloud server and the plurality of edge servers.

2 . The map management system according to claim 1 , wherein the processor determines map update data that satisfy:
the number of the plurality of vehicles from is larger than a reference number; and the matching ratio is higher than a reference ratio, as being valid, among the plurality of pieces of map update data.

Assignees

• Toyota Motor Co Ltd

Inventors

• Zhong Lei
• Ma Jing
• Shao Xiao
• Onishi Ryokichi

Classifications

• G06F16/29

  Geographical information databases · CPC title

• G06F16/2365 Primary

  Ensuring data consistency and integrity · CPC title

• G01C21/3841 Primary

  Data obtained from two or more sources, e.g. probe vehicles · CPC title

• G06F16/27 Primary

  Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor · CPC title