Information processing system, storage medium storing information processing program, and control method

Patent metadata

Field	Value
Publication number	US-11280917-B2
Application number	US-201916458444-A
Country	US
Kind code	B2
Filing date	Jul 1, 2019
Priority date	Jul 31, 2018
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

An information processing system includes a server and a first vehicle acquiring a combination of first and second position information of the first vehicle. The first position information is calculated using a positioning signal from the first satellite system. The second position information is obtained by correcting an error of the first position information using a positioning reinforcement signal from the second satellite system. The first vehicle or the server calculates difference information between the first and second position information for each combination thereof. The server estimates a calculation accuracy for the first position information in a road section on a road map based on one or more pieces of difference information in which one or more positions indicated by the second position information corresponding to the difference information are within the road section and to output the calculation accuracy for the first position information in the road section.

First claim

What is claimed is:

1. An information processing system comprising:
a first vehicle configured to receive signals from a first satellite system and a second satellite system;
a server comprising a processor and a memory and being configured to communicate with the first vehicle; and
a second vehicle configured to communicate with the server, wherein
the first vehicle is configured to acquire a combination of first position information and second position information of the first vehicle, the first position information being information which is calculated using a positioning signal from the first satellite system, the second position information being information which is obtained by correcting an error of the first position information using a positioning reinforcement signal from the second satellite system,
the first vehicle or the server is configured to calculate difference information between the first position information and the second position information for each combination of the first position information and the second position information which are acquired by the first vehicle,
the server is configured to estimate a calculation accuracy for the first position information in a road section on a road map based on one or more pieces of the difference information in which one or more positions indicated by the second position information corresponding to the difference information are within the road section and to output the calculation accuracy for the first position information in the road section, and
the second vehicle is configured to:
receive the calculation accuracy for the first position information in the road section which is output from the server;
perform an operation based on the calculation accuracy during travel in the road section;
be capable of receiving a positioning signal from the first satellite system and not be capable of receiving a positioning reinforcement signal from the second satellite system;
perform a first operation during travel in the road section when the calculation accuracy received from the server is equal to or greater than a reference calculation accuracy, the first operation requiring position information of the second vehicle with a high accuracy satisfying a predetermined reference; and
perform a second operation or a third operation during travel in the road section when the calculation accuracy received from the server is less than the reference calculation accuracy, the second operation being performed using position information of the second vehicle with a low accuracy not satisfying the predetermined reference, the third operation being performed without using position information of the second vehicle.

2. The information processing system according to claim 1 , wherein the server is configured to estimate the calculation accuracy for the first position information in the road section based on an average value of the one or more pieces of the difference information.

3. The information processing system according to claim 2 , wherein the server is configured to estimate one of the calculation accuracy which are a plurality of levels of from a high level to a low level based on the average value of the one or more pieces of the difference information as the calculation accuracy.

4. The information processing system according to claim 1 , wherein the first satellite system includes a global constellation and the second satellite system includes a local constellation.

5. A non-transitory computer-readable storage medium storing an information processing program to perform operations of an information processing device configured to communicate with a first vehicle and a second vehicle, the first vehicle being configured to receive signals from a first satellite system and a second satellite system, the operations comprising:
receiving a combination of first position information and second position information of the first vehicle from the first vehicle, the first position information being information which is calculated using a positioning signal from the first satellite system, the second position information being information which is obtained by correcting an error of the first position information using a positioning reinforcement signal from the second satellite system;
calculating difference information between the first position information and the second position information for each combination of the first position information and the second position information which are received from the first vehicle;
estimating a calculation accuracy for the first position information in a road section on a road map based on one or more pieces of the difference information in which one or more positions indicated by the second position information corresponding to the difference information are within the road section;
outputting the calculation accuracy for the first position information in the road section;
receiving the calculation accuracy for the first position information in the road section which is output;
performing an operation based on the calculation accuracy during travel in the road section;
being capable of receiving a positioning signal from the first satellite system and not being capable of receiving a positioning reinforcement signal from the second satellite system;
performing a first operation during travel in the road section when the received calculation accuracy is equal to or greater than a reference calculation accuracy, the first operation requiring position information of the second vehicle with a high accuracy satisfying a predetermined reference; and
performing a second operation or a third operation during travel in the road section when the received calculation accuracy is less than the reference calculation accuracy, the second operation being performed using position information of the second vehicle with a low accuracy not satisfying the predetermined reference, the third operation being performed without using position information of the second vehicle.

6. A control method for an information processing device that is configured to communicate with a first vehicle and a second vehicle, the first vehicle being configured to receive signals from a first satellite system and a second satellite system, the control method comprising:
receiving a combination of first position information and second position information of the first vehicle from the first vehicle, the first position information being information which is calculated using a positioning signal from the first satellite system, the second position information being information which is obtained by correcting an error of the first position information using a positioning reinforcement signal from the second satellite system;
calculating difference information between the first position information and the second position information for each combination of the first position information and the second position information which are received from the first vehicle;
estimating a calculation accuracy for the first position information in a road section on a road map based on one or more pieces of the difference information in which one or more positions indicated by the second position information corresponding to the difference information are within the road section;
outputting the calculation accuracy for the first position information in the road section;
receiving the calculation accuracy for the first position information in the road section which is output;
performing an operation based on the calculation accuracy during travel in the road section;
being capable of receiving a positioning signal from the first satellite system and not being capable of receiving a positioning reinforcement signal from the second satellite system;

Assignees

• Toyota Motor Co Ltd

Inventors

• Nishimura Kazuya
• Oe Yoshihiro
• Kamimaru Hirofumi

Classifications

• G01S19/396

  Determining accuracy or reliability of position or pseudorange measurements · CPC title

• G01S19/252

  Employing an initial estimate of location in generating assistance data · CPC title

• G01S19/258

  relating to the satellite constellation, e.g. almanac, ephemeris data, lists of satellites in view · CPC title

• G01S19/41

  Differential correction, e.g. DGPS [differential GPS] · CPC title

• G08G1/20

  Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles · CPC title