US-12621635-B2 - Information processing device and information processing method

US12621635B2US 12621635 B2US12621635 B2US 12621635B2US-12621635-B2

Abstract

An information processing device includes a control unit that executes: acquiring, from a first device, third information including information about a time when first information is transmitted and a time when second information is received; acquiring, from a second device, fourth information including information about a time when the first information is received and a time when the second information is transmitted; and correcting a time included in the third information or the fourth information such that a time period from the time when the first device transmits the first information to the time when the second device receives the first information is equal to a time period from the time when the second device transmits the second information to the time when the first device receives the second information.

Inventors

Hiroshi Kato

Assignees

TOYOTA JIDOSHA KABUSHIKI KAISHA
MATSUO INDUSTRIES, INC.

Dates

Publication Date: 20260505
Application Date: 20240109
Priority Date: 20230130

Claims (5)

1 . An information processing device comprising a processor that executes: acquiring, from a first device, third information including information about a first time when first information is transmitted and a second time when second information is received; acquiring, from a second device, fourth information including information about a third time when the first information is received and a fourth time when the second information is transmitted; and correcting the first time or the second time included in the third information, or the third time or the fourth time included in the fourth information, such that a time period from the first time when the first device transmits the first information to the third time when the second device receives the first information is equal to a time period from the fourth time when the second device transmits the second information to the second time when the first device receives the second information, wherein the correcting includes shifting at least one of a first time axis of the third information or a second time axis of the fourth information such that a first middle point between the first time and the second time coincides with a second middle point between the third time and the fourth time.
2 . The information processing device according to claim 1 , wherein the second information is information transmitted by the second device in response to the first information.
3 . The information processing device according to claim 1 , wherein the first device is a first communication unit of a first vehicle and the second device is a second communication unit of a second vehicle.
4 . An information processing method, wherein a computer executes: acquiring, from a first device, third information including information about a first time when first information is transmitted and a second time when second information is received; acquiring, from a second device, fourth information including information about a third time when the first information is received and a fourth time when the second information is transmitted; and correcting the first time or the second time included in the third information, or the third time or the fourth time included in the fourth information, such that a time period from the first time when the first device transmits the first information to the third time when the second device receives the first information is equal to a time period from the fourth time when the second device transmits the second information to the second time when the first device receives the second information, wherein the correcting includes shifting at least one of a first time axis of the third information or a second time axis of the fourth information such that a first middle point between the first time and the second time coincides with a second middle point between the third time and the fourth time.
5 . The information processing method according to claim 4 , wherein the first device is a first communication unit of a first vehicle and the second device is a second communication unit of a second vehicle.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Japanese Patent Application No. 2023-011806 filed on Jan. 30, 2023, incorporated herein by reference in its entirety. BACKGROUND 1. Technical Field The present disclosure relates to an information processing device and an information processing method. 2. Description of Related Art Receiving time information transmitted from the outside, such as a global positioning system (GPS) signal and the like, during communication between a plurality of vehicles, and including the received time information in a radio signal transmitted to another vehicle (for example, refer to Japanese Unexamined Patent Application Publication No. 2010-251989 (JP 2010-251989 A)) is known. SUMMARY Once the time information is transmitted, no other information that matches the amount of the time information can be transmitted. An object of the present disclosure is to correct a time axis while suppressing an increase in information to be transmitted. An aspect of the present disclosure provides an information processing device including a control unit that executes: acquiring, from a first device, third information including information about a time when first information is transmitted and a time when second information is received; acquiring, from a second device, fourth information including information about a time when the first information is received and a time when the second information is transmitted; and correcting a time included in the third information or the fourth information such that a time period from the time when the first device transmits the first information to the time when the second device receives the first information is equal to a time period from the time when the second device transmits the second information to the time when the first device receives the second information. Further, other aspects of the present disclosure represent an information processing method in which a computer executes processes of the information processing device, a program for causing the computer to execute the processes, and a storage medium that stores the program non-temporarily. According to the present disclosure, it is possible to correct the time axis while suppressing an increase in information to be transmitted. BRIEF DESCRIPTION OF THE DRAWINGS Features, advantages, and technical and industrial significance of exemplary embodiments of the disclosure will be described below with reference to the accompanying drawings, in which like signs denote like elements, and wherein: FIG. 1 is a diagram showing a schematic configuration of a system according to an embodiment; FIG. 2 is a diagram showing transmission/reception times of first information and second information before times included in third information and fourth information are corrected; FIG. 3 is a diagram showing the transmission/reception times of the first information and the second information after correcting the time; FIG. 4 is a block diagram schematically showing an example of configurations of a first vehicle, a second vehicle, and a user terminal that constitute a system; FIG. 5 is a diagram showing an example of functional configurations of the first vehicle, the second vehicle, and the user terminal; and FIG. 6 is a flowchart of processing for correcting time axes of the third information and the fourth information. DETAILED DESCRIPTION OF EMBODIMENTS Time synchronization may be required when a plurality of vehicles communicate with each other. Here, since signal connection cannot be made during a travelling test of a vehicle, it may be difficult to synchronize a time. For example, it is conceivable to acquire information about an absolute time from a GPS system mounted in the vehicle. However, there is an upper limit for an amount of data that can be transmitted. Therefore, when the information about the absolute time is added to the communication between the vehicles, no other data can be transmitted. Therefore, the information processing device according to the present disclosure includes a control unit that executes: acquiring, from a first device, third information including information about a time when first information is transmitted and a time when second information is received; acquiring, from a second device, fourth information including information about a time when the first information is received and a time when the second information is transmitted; and correcting a time included in the third information or the fourth information such that a time period from the time when the first device transmits the first information to the time when the second device receives the first information is equal to a time period from the time when the second device transmits the second information to the time when the first device receives the second information. The control unit corrects the time, assuming that time period required for the first information to reach the second