JP2002031544A - Information processing device, its method, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily detect a traffic accident. SOLUTION: A portable telephone 1 detects own position at certain intervals by using a radio wave transmitted from a plurality of base station, for example, and transmits its positional information and a time of detecting the position to a monitoring device 2. The monitoring device 2 computes a traveling speed of the portable telephone 1 as a vehicle speed of an automobile carrying it on the basis of the positional information and the detection time transmitted from the portable telephone 1. The monitoring device 2 monitors occurrence of an accident on the basis of the computed automobile vehicle speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus and method, and a recording medium, and more particularly to an information processing apparatus and method capable of easily detecting a traffic accident using a mobile communication terminal. And a recording medium.

[0002]

2. Description of the Related Art Systems for detecting the occurrence of an accident in a traveling vehicle have been developed.

[0003]

However, in the conventional system, the occurrence of an accident is detected by detecting a change in the speed of the vehicle by various sensors installed on the road side. Therefore, there have been problems that it takes time to manage the sensors and it is not easy to expand the system.

[0004] The present invention has been made in view of such a situation, and makes it possible to easily detect the occurrence of an accident by using a mobile communication terminal such as a mobile phone or a PHS. is there.

[0005]

An information processing apparatus according to the present invention acquires position information of a first point at a first time of a mobile communication terminal carried by a mobile body, and obtains the first information of the first point of the mobile communication terminal. Acquiring the position information of the second point at the second time later than the time, based on the position information of the first time and the first point, and the position information of the second time and the second point, A calculating unit that calculates the moving speed of the mobile communication terminal at predetermined time intervals, and a calculating unit that compares the moving speed calculated earlier with the moving speed calculated thereafter, and performs a process based on the comparison result. Executing means for executing.

The calculating means is, for example, a processing unit 2 shown in FIG.
1, the execution means is, for example, the processing unit 21 shown in FIG.
, Respectively.

[0007] The execution means, calculated by the calculation means,
It is possible to compare the newest moving speed with the average speed of the section in which the moving body moves, and execute processing based on the comparison result.

The calculating means updates the average speed based on the calculated moving speed, and the executing means updates the average speed and
The average speed before the update is compared with the average speed, and a process based on the comparison result can be executed.

[0009] The execution means can compare the updated average speed with the average speed of another section adjacent to the section, and can execute processing based on the comparison result.

[0010] In the information processing apparatus of the present invention, the position information of the first point at the first time of the mobile communication terminal carried by the mobile object is obtained, and the position information of the first point after the first time of the mobile communication terminal is obtained. 2 to obtain the position information of the second point at the second time, and move the mobile communication terminal based on the position information of the first time and the first point, and the second time and the position information of the second point. The speed is calculated every predetermined time, the previously calculated moving speed is compared with the subsequently calculated moving speed, and a process based on the comparison result is executed.

According to the information processing apparatus of the present invention, the position information of the first point at the first time of the mobile communication terminal carried by the mobile body is acquired, and the position information is obtained later than the first time of the mobile communication terminal. The position information of the second point at time 2 is acquired, and the position information of the first time and the position of the first point are obtained.
Based on the time and the position information of the second point, the moving speed of the mobile communication terminal is calculated every predetermined time, and the previously calculated moving speed is compared with the subsequently calculated moving speed. Therefore, for example, a traffic accident can be easily detected.

According to the information processing method of the present invention, position information of a first point at a first time of a mobile communication terminal carried by a mobile object is acquired, and a second information after the first time of the mobile communication terminal is acquired. At the time of the second point, and based on the first time and the position information of the first point, and the moving speed of the mobile communication terminal based on the second time and the position information of the second point. Is calculated every predetermined time; and
The processing of the calculating step includes an execution step of comparing the previously calculated moving speed with the subsequently calculated moving speed and executing a process based on the comparison result.

The calculation step can be constituted by, for example, steps S34 and S36 in FIG. 7, and the execution step can be constituted by, for example, step S39 in FIG.

In the information processing method according to the present invention, the position information of the first point at the first time of the mobile communication terminal carried by the mobile object is obtained, and the position information of the first point after the first time of the mobile communication terminal is acquired. 2 to obtain the position information of the second point at the second time, and move the mobile communication terminal based on the position information of the first time and the first point, and the second time and the position information of the second point. The speed is calculated every predetermined time, the previously calculated moving speed is compared with the subsequently calculated moving speed, and a process based on the comparison result is executed.

According to the information processing method of the present invention, the position information of the first point of the mobile communication terminal carried by the mobile object at the first time is acquired, and the position information is obtained later than the first time of the mobile communication terminal. The position information of the second point at time 2 is acquired, and the position information of the first time and the position of the first point are obtained.
Based on the time and the position information of the second point, the moving speed of the mobile communication terminal is calculated every predetermined time, and the previously calculated moving speed is compared with the subsequently calculated moving speed. Therefore, for example, a traffic accident can be easily detected.

[0016] The program of the recording medium of the present invention obtains position information of a first point at a first time of a mobile communication terminal carried by a mobile body, and obtains the position information of the first point after the first time of the mobile communication terminal. 2 to obtain the position information of the second point at the second time, and move the mobile communication terminal based on the position information of the first time and the first point, and the second time and the position information of the second point. Calculating a speed every predetermined time;
The processing of the calculating step includes an execution step of comparing the previously calculated moving speed with the subsequently calculated moving speed and executing a process based on the comparison result.

The calculation step can be constituted by, for example, steps S34 and S36 in FIG. 7, and the execution step can be constituted by, for example, step S39 in FIG.

According to the program of the recording medium of the present invention, the position information of the first point of the mobile communication terminal carried by the mobile object at the first time is obtained, and the position information of the mobile communication terminal after the first time of the mobile communication terminal is obtained. The position information of the second point at the second time is acquired, and the position information of the mobile communication terminal is obtained based on the position information of the first time and the first point, and the position information of the second time and the second point. The moving speed is calculated at each predetermined time, the previously calculated moving speed is compared with the subsequently calculated moving speed, and a process based on the comparison result is executed.

According to the recording medium program of the present invention,
The position information of the first point of the mobile communication terminal carried by the mobile object at the first time is obtained, and the position information of the second point at the second time later than the first time of the mobile communication terminal is obtained. Acquiring the first time and the location information of the first point;
Based on the second time and the position information of the second point, the moving speed of the mobile communication terminal is calculated every predetermined time,
Since the previously calculated moving speed is compared with the subsequently calculated moving speed, for example, a traffic accident can be easily detected.

[0020]

FIG. 1 shows an example of use of a traffic information collecting system provided with the present invention. This system includes, for example, a mobile phone 1 carried in a running automobile, and a monitoring device 2 that communicates with the mobile phone 1 via an antenna 25.

The mobile phone 1 detects its own position at predetermined intervals, and monitors its position information (for example, coordinates corresponding to latitude and longitude), the time at which the position was detected, and the like. Send to

The monitoring device 2 calculates the moving speed of the mobile phone 1 as the vehicle speed of the automobile carrying the mobile phone 1 based on the position information and the detection time transmitted from the mobile phone 1. The monitoring device 2 monitors whether an accident has occurred based on the calculated vehicle speed of the vehicle.

FIG. 2 shows a configuration example of the mobile phone 1. Note that FIG. 2 shows only a configuration necessary for using this system, and does not show other configurations for realizing the function as the mobile phone.

The input section 12 is composed of various buttons and the like, and outputs a signal corresponding to an operation by a user to the processing section 11.

The storage unit 13 stores a system ID (described later) supplied from the monitoring device 2 via the processing unit 11.

The position detector 14 detects the position of the mobile phone 1. The communication unit 15 communicates with the monitoring device 2 via the antenna 16.

The processing section 11 controls each section and executes various processes.

FIG. 3 shows an example of the configuration of the monitoring device 2.

The input unit 22 is composed of a keyboard and the like, and outputs a signal corresponding to an operation by the administrator of the monitoring device 2.
Output to the processing unit 21.

The storage unit 23 stores a system ID (described later) and information from the mobile phone 1 supplied from the processing unit 21. The communication unit 24 communicates with the mobile phone 1 via the antenna 25.

The processing section 21 controls each section to execute processing such as monitoring processing to be described later.

Next, the operation of the mobile phone 1 will be described with reference to the flowchart of FIG.

In step S1, the user performs an operation on the input unit 12 of the mobile phone 1 to put the mobile phone 1 into the traveling state information transmission mode, and a signal corresponding to the operation is transmitted from the input unit 12 to the input unit 12. When supplied to the processing unit 11, in step S2, the processing unit 11 executes a process of acquiring a system ID. The details of the system ID acquisition process here will be described later, but by executing this process, the processing unit 11 acquires the system ID used to identify the mobile phone 1.

Next, in step S3, the processing unit 11
Controls the position detection unit 14 to determine a predetermined interval (for example,
At each time T), a process of detecting the position of the mobile phone 1 is started. Specifically, the position detection unit 14
Radio waves from a plurality of base stations are received via the communication unit 15 and the antenna 16. Then, the position detector 14 calculates the position of the mobile phone 1 based on the position information of the base station indicated by the received radio wave and the reception time of the radio wave.

In step S4, the processing unit 11 determines the position information and the time when the position of the mobile phone 1 is detected in the position detection process started in step S3 (hereinafter, it is not necessary to distinguish each of them). , Collectively referred to as traveling state information) from the position detection unit 14 and transmits it to the monitoring device 2 via the communication unit 15 and the antenna 16 together with the system ID acquired in step S2.

Next, in step S5, the processing unit 11
Determines whether or not the traveling state information transmission mode has been released. If it is determined that the traveling state information transmission mode has not been released, the process returns to step 4 and executes the subsequent processing. If it is determined in step S5 that it has been released, the process ends. That is, the traveling state information (position information and detection time) and the system ID are transmitted to the monitoring device 2 at every time T until the traveling state information transmission mode is canceled.

Next, the details of the processing of step S2 (system ID acquisition processing) in FIG. 4 will be described with reference to the flowchart in FIG.

In step S11, the processing section 11
The storage unit 13 deletes the system ID stored in the previously executed system ID acquisition process.

Next, in step S12, the processing unit 1
1 transmits a signal for requesting a system ID (hereinafter, referred to as a system ID request signal) to the monitoring device 2 via the communication unit 15 and the antenna 16.

In step S13, the processing unit 11
The communication unit 15 determines whether a predetermined number (a random number, hereinafter, referred to as a first random number) from the monitoring device 2 has been received. If it is determined that the number has been received, the process proceeds to step S14. move on.

In step S14, the processing section 11
Generating a random number as a second random number;
This is transmitted to the monitoring device 2 via the communication unit 15 and the antenna 16.

Next, in step S15, the processing unit 1
1 is a system I from the monitoring device 2 by the communication unit 15.
It is determined whether or not D (an ID generated by combining the first random number and the second random number) is received. If it is determined that D has been received, the process proceeds to step S16, and the storage unit 13 stores it. To memorize.

In step S17, the processing unit 11
In step S16, the system I stored in the storage unit 13
D (the system ID received in step S15) is transmitted to the monitoring device 2 via the communication unit 15 and the antenna 16.

Thereafter, the process ends, and step S in FIG.
Proceed to 3.

Next, the operation of the monitoring apparatus 2 when executing the processing corresponding to the above-described system ID acquisition processing (system ID assignment processing) will be described with reference to the flowchart of FIG.

In step S21, the processing unit 21 of the monitoring apparatus 2 waits until the communication unit 24 receives the system ID request signal. When the system ID request signal is received, the process proceeds to step S22, where the first random number is transmitted. Is generated and transmitted to the mobile phone 1 via the communication unit 24. Mobile phone 1
Receives the first random number (step S in FIG. 5).
13).

Next, in step S23, the processing unit 2
Reference numeral 1 denotes a second random number transmitted from the mobile phone 1 that is the transmission source of the system ID request signal received in step S21 by the communication unit 24 (step S14 in FIG. 5).
It is determined whether or not has been received, and if it is determined that has been received, the process proceeds to step S24. On the other hand, when it is determined that the first random number has not been received (for example, when the first random number has not been received even after the elapse of a predetermined time after transmitting the first random number), the process returns to step S22.

In step S24, the processing section 21
The first random number generated in step S22 and the second random number received in step S23 are combined based on a predetermined rule to generate a system ID, and the mobile phone is connected via the communication unit 24. Send to 1. Mobile phone 1
Receives the system ID transmitted from the monitoring device 2 (step S15 in FIG. 5).

Next, in step S25, the processing unit 2
1 is transmitted from the mobile phone 1 by the communication unit 24 to step S
It is determined whether or not an ID similar to the system ID transmitted in 24 (step S17 in FIG. 5) has been received. If it is determined that the ID has been received, the process proceeds to step S26.

In step S26, the processing section 21
The system ID received in step S25 (step S25)
24 is stored in the storage unit 23. Then, returning to step S21, the processing unit 21
The subsequent processing is repeatedly executed.

If it is determined in step S25 that the system ID has not been received (for example, if the system ID has not been received after a predetermined time has passed since the transmission of the system ID), the processing of step S26 is skipped, It returns to step S21. That is, in this case, assuming that the system ID transmitted in step S <b> 24 has not been received by the mobile phone 1, the system ID is not stored in the storage unit 23.

Next, the operation of the monitoring device 2 when the mobile phone 1 executes a monitoring process for monitoring a carried car will be described.
This will be described with reference to the flowchart of FIG.

In step S31, the processing unit 21 of the monitoring device 2 initializes the value of the counter i to 0.

In step S32, the processing unit 21 of the monitoring device 2 receives the system ID and the traveling state information (position information and detection time) (step S4 in FIG. 4) transmitted from the mobile phone 1 by the communication unit 24. The process waits until the information is received, and when they are received, the process proceeds to step S33.

In step S33, the processing section 21
The same ID as the received system ID is detected from the system ID stored in the storage unit 23 (the system ID stored in step S26 in FIG. 6), and the received traveling state information (position information and detection time) is detected. ) Is stored in association with the detected system ID.

FIG. 8 shows the system ID and the running state information stored in the storage unit 23. As described above, the position information and the detection time received in step S32 in FIG. 7 are stored corresponding to the system ID stored in step S26 in FIG. 6, but two position information ( First position information and second position information), 2
One detection time (a first detection time corresponding to the first position information and a second detection time corresponding to the second position information) is stored.

For example, when the position information and the detection time are newly received and stored, the first position information and the one stored as the first detection time are deleted, and the second position information and the second detection time are deleted. Are stored as the first position information and the first detection time, respectively. Then, the newly received information is stored as the second position information and the second detection time.

Next, in step S34, the processing unit 2
1 calculates the vehicle speed based on the first position information and the first detection time, and the second position information and the second detection time.

For example, equation (1) is calculated, and the moving speed of the mobile phone 1 as the vehicle speed is calculated. In addition,
In the formula, x1 is the X-axis coordinate of the first position information, and y1
Is the Y-axis coordinate of the first position information. x2 is the X-axis coordinate of the second position information, and y2 is the Y-axis coordinate of the second position information. Further, t1 is a first detection time, and t2 is a second detection time.

[0060]

(Equation 1) ... (1)

In step S35, the processing section 21
The calculated vehicle speed is stored in the storage unit 23 in association with the system ID.

FIG. 9 shows the vehicle speed stored in the storage unit 23. Thus, corresponding to the system ID,
Although the vehicle speed calculated in step S34 is stored,
For each system ID, two vehicle speeds (a first vehicle speed calculated immediately before and a second vehicle speed calculated just now) are stored.

For example, when a new vehicle speed is calculated and stored, the one stored as the first vehicle speed is deleted, and the one stored as the second vehicle speed is replaced with the first vehicle speed. It is stored as the vehicle speed. Then, the newly calculated value is stored as the second vehicle speed.

In step S36, the processing section 21
The first vehicle speed is subtracted from the second vehicle speed, and it is determined whether or not the value is smaller than a value N. If it is determined that the value is smaller than N, the process proceeds to step S37, and the value of the counter i is set to 1 Only increment. Since N is a negative value, it is determined here whether the speed has been reduced to a predetermined speed or more.

The vehicle speed when normal deceleration is performed is as follows.
In FIG. 10, as shown by the solid line, the vehicle speed decreases smoothly, but when an accident occurs, for example, when a sudden brake or the like is applied or a collision occurs, the vehicle speed is indicated by a dotted line in the diagram. As shown, it decreases sharply. That is, if the detected vehicle speed (second vehicle speed) is extremely lower than the previously detected vehicle speed (first vehicle speed) (if the difference is equal to or less than the value N), an accident occurs. It is presumed that an error has occurred, and the value of the counter i is incremented by one.

Next, in step S38, the processing unit 2
1 determines whether or not the value of the counter i is equal to or greater than a predetermined value M, and when it is determined that the value is not greater than or equal to the value, the process returns to step S32 to execute the subsequent processing.

If it is determined in step S38 that the value of the counter i is equal to or more than the value M, that is, if it is determined in step S36 that an accident has occurred continuously M times, the process proceeds to step S39.

In step S39, the processing section 21
Performs processing to communicate to the administrator of the traffic information collection system that an accident has occurred. Further, a process of notifying the driver of the vehicle, which is presumed that the accident has occurred, of the occurrence of the accident is performed. For example, after the vehicle stops, a process of making a call to the mobile phone 1 is executed in order to notify that abnormal running has occurred, its location, and a change in speed. Furthermore, based on the latest position information of the vehicle, a process of notifying the vehicle near the accident that the accident has occurred may be performed.

If it is determined in step S36 that the value obtained by subtracting the first vehicle speed from the second vehicle speed is not less than the value N, the process returns to step S31, and the value of the counter i is initialized to 0. Is done. That is, assuming that no accident has occurred, the value of the counter i that has counted the number of times that the accident has been estimated to have occurred is reset.

Thereafter, the processing ends.

In the above description, the previously calculated vehicle speed (first vehicle speed) is compared with the subsequently calculated vehicle speed (current vehicle speed) (second vehicle speed). Although the occurrence of an accident is detected, the current vehicle speed can be compared with the space speed.

The space velocity is an average value of vehicle speeds of vehicles passing through a predetermined road section, and is used as an index indicating a traffic condition in the section.

For example, in the example of FIG. 11, the average value of the vehicle speeds of the m vehicles 1 to m running in the section from the measurement point A to the measurement point B is set as the space velocity in that section.

The space velocity can be calculated based on the vehicle speed detected by a center or the like provided in the section, or the monitoring device 2 can control the plurality of automobiles when traveling in the section. The vehicle speed of each vehicle (Step S34) calculated at that time by the monitoring process is
You can also get by averaging.

The flowchart of FIG. 12 shows a processing procedure of the monitoring processing when the space velocity is used. In this case, it is assumed that the calculated space velocity is stored in the storage unit 23 of the monitoring device 2 in advance.

In steps S51 to S54,
Since basically the same processing as in the case of steps S31 to S34 in FIG. 7 is performed, the description thereof is omitted.

In step S55, the processing section 21 of the monitoring device 2 calculates the vehicle speed from the vehicle speed calculated in step S54.
The space velocity stored in the storage unit 23 is subtracted, and it is determined whether or not the absolute value is larger than a predetermined value L. If it is determined that the absolute value is larger, the process proceeds to step S56.

The processing in steps S56 to S58 is basically the same as the processing in steps S37 to S39 in FIG. 7, and a description thereof will be omitted.

That is, in the case of this example, if the difference between the vehicle speed and the space speed is larger than the predetermined value L, it is estimated that an accident has occurred.

In the above example, the occurrence of an accident is detected by comparing the calculated vehicle speed (step S54) with the space speed. However, the space speed is updated based on the calculated vehicle speed and updated. It is also possible to compare the space velocity with the space velocity before updating. Further, the updated space velocity can be compared with the space velocity of another section (adjacent section).

The above-described series of processing can be realized by hardware, but can also be realized by software. When a series of processing is realized by software, a program constituting the software is installed in a computer, and the program is executed by the computer, whereby the above-described monitoring device 2 is functionally realized.

FIG. 13 is a block diagram showing the configuration of an embodiment of the computer 101 functioning as the monitoring device 2 as described above. CPU (Central Processing Unit)
I / O interface 1 is connected to bus 111 via bus 115.
16 is connected, and the CPU 111 receives a command from an input unit 118 including a keyboard, a mouse, and the like from the user via the input / output interface 116.
For example, a magnetic disk 131, an optical disk 132, and a magneto-optical disk 13 mounted on a ROM (Read Only Memory) 112, a hard disk 114, or a drive 120.
3 or a program stored in a recording medium such as the semiconductor memory 134 is stored in a RAM (Random Access Memory).
113 and executed. As a result, the various processes described above (for example, the processes shown by the flowcharts in FIGS. 6, 7, and 12) are performed. Further, the CPU 111
Sends the processing result to, for example, the input / output interface 1
Via a display 16, the data is output to a display unit 117 such as an LCD (Liquid Crystal Display) as necessary. The program is stored in the hard disk 114 or the ROM 112 in advance and provided to the user integrally with the computer 101, or the magnetic disk 131, the optical disk 132,
It can be provided as a package medium such as the magneto-optical disk 133 and the semiconductor memory 134, or can be provided to the hard disk 114 via a communication unit 119 from a satellite or a network.

In the present specification, the step of describing a program provided by a recording medium may be performed not only in chronological order but also in chronological order according to the described order. This also includes processing executed in parallel or individually.

In this specification, the system is
It represents the entire device composed of a plurality of devices.

[0085]

According to the present invention, for example, a traffic accident can be easily detected.

[Brief description of the drawings]

FIG. 1 is a diagram showing a usage example of a traffic information collection system to which the present invention is applied.

FIG. 2 is a block diagram showing a configuration example of the mobile phone 1 of FIG.

FIG. 3 is a block diagram illustrating a configuration example of a monitoring device 2 of FIG. 1;

FIG. 4 is a flowchart illustrating an operation of the mobile phone 1.

FIG. 5 is a flowchart illustrating a system ID acquisition process in step S2 of FIG. 4;

FIG. 6 is a flowchart illustrating an operation of the monitoring device 2 when executing a system ID assigning process.

FIG. 7 is a flowchart illustrating an operation of the monitoring device 2 when executing a monitoring process.

FIG. 8 is a diagram showing a system ID and traveling state information recorded in a storage unit 23 of the monitoring device 2.

FIG. 9 is a diagram showing a vehicle speed stored in the storage unit 23 of the monitoring device 2 corresponding to the system ID.

FIG. 10 is a diagram showing a change in vehicle speed when an accident occurs.

FIG. 11 is a diagram illustrating space velocity.

FIG. 12 is a flowchart illustrating an operation of the monitoring device 2 when performing a monitoring process using space velocity.

FIG. 13 is a diagram illustrating a configuration example of a computer 101.

[Explanation of symbols]

 Reference Signs List 1 mobile phone 2 monitoring device 11 processing unit 12 input unit 13 storage unit 14 position detection unit 15 communication unit 16 antenna 21 processing unit 22 input unit 23 storage unit 24 communication unit 25 antenna

Claims (6)

[Claims] 1. A first mobile communication terminal carried by a mobile object.
Obtaining the position information of the first point at the time of the second point, obtaining the position information of the second point at the second time after the first time of the mobile communication terminal, and obtaining the first time and the A calculating unit that calculates a moving speed of the mobile communication terminal at predetermined time intervals based on the position information of the first point, the arrangement time of the second point, and the position information of the second point; The moving speed calculated above,
An information processing apparatus, comprising: an execution unit that compares the moving speed calculated after that, and executes a process based on the comparison result. 2. The method according to claim 1, wherein the executing unit compares the latest moving speed calculated by the calculating unit with an average speed of a section in which the moving body moves, and executes a process based on the comparison result. The information processing apparatus according to claim 1, wherein: 3. The calculating unit updates the average speed with the calculated moving speed, and the executing unit compares the updated average speed with the average speed before being updated, 3. The information processing apparatus according to claim 2, wherein a process based on the comparison result is executed. 4. The apparatus according to claim 1, wherein the execution unit compares the updated average speed with an average speed of another section adjacent to the section, and executes a process based on the comparison result. 4. The information processing device according to 3. 5. A first mobile communication terminal carried by a mobile object.
Obtaining the position information of the first point at the time of the second point, obtaining the position information of the second point at the second time after the first time of the mobile communication terminal, and obtaining the first time and the A calculating step of calculating the moving speed of the mobile communication terminal at predetermined time intervals based on the position information of the first point, the arrangement time of the second point, and the position information of the second point; And an execution step of comparing the previously calculated moving speed with the subsequently calculated moving speed, and executing a process based on the comparison result. 6. A first mobile communication terminal carried by a mobile object.
Obtaining the position information of the first point at the time of the second point, obtaining the position information of the second point at the second time after the first time of the mobile communication terminal, and obtaining the first time and the A calculating step of calculating the moving speed of the mobile communication terminal at predetermined time intervals based on the position information of the first point, the arrangement time of the second point, and the position information of the second point; And causing the computer to execute a process characterized by including an execution step of comparing the previously calculated moving speed with the subsequently calculated moving speed and executing a process based on the comparison result. A recording medium on which a program is recorded.