JP2022124947A - Vehicle travel data processing load reducing system - Google Patents

Abstract

To provide a vehicle travel data processing load reducing system suitable for rapid processing of a large amount of vehicle travel data.SOLUTION: A vehicle travel data processing load reducing system comprises: a data acquisition device for acquiring vehicle travel data in a data acquisition period in a section on a road; and a data processing device for processing vehicle travel data constellation acquired in the data acquisition period by the data acquisition device. The data processing device includes: a data processing unit for processing the vehicle travel data constellation acquired in the data acquisition period by the data acquisition device; and a processing target data reduction unit for reducing the number of the vehicle travel data which is a processing target of the data processing unit in the vehicle travel data constellation, when the data processing unit determines that key data satisfying a predetermined condition is contained in the vehicle travel data constellation.SELECTED DRAWING: Figure 5

Description

The present invention relates to a vehicle travel data processing load reduction system.

As vehicle travel data, probe car travel data, for example, is sent from each probe car to a center server, analyzed, and used to generate traffic information such as congestion information (see Patent Documents 1 to 4).
For autonomous driving, it is required to generate traffic information accurately and extensively on the map. For that purpose, an increase in the number of vehicle travel data to be processed is unavoidable. On the other hand, speed is also required in the generation of traffic information to be reflected in the map when executing automatic driving.
As described above, the amount of vehicle travel data to be processed increases, and the time required for the processing is required to be shortened. Therefore, the server system that processes the vehicle travel data is heavily burdened.

JP 2018-055208 A JP 2013-218512 A JP 2013-008148 A JP 2011-209818 A

The above-mentioned patent documents disclose that various types of traffic information are generated by processing vehicle travel data sent from probe cars. However, since it is not assumed that the vehicle travel data to be processed becomes enormous, it cannot be applied as it is to the generation of traffic information suitable for automatic driving, for example.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle travel data processing load reduction system suitable for rapidly processing a large amount of vehicle travel data.

The present invention has been made to achieve this object, and the first aspect thereof is defined as follows. Namely
a data acquisition device for acquiring vehicle travel data during a data acquisition period in a section on a road;
A vehicle travel data processing load reduction system comprising a data processing device that processes the vehicle travel data group acquired by the data acquisition device during the data acquisition period,
The data processing device includes a data processing unit that processes the vehicle travel data group;
A process of reducing the number of vehicle travel data to be processed by the data processing unit in the vehicle travel data group when the data processing unit determines that the vehicle travel data group includes key data that satisfies a predetermined condition. A vehicle travel data processing load reduction system comprising: a target data reduction unit.

In the vehicle travel data processing load reduction system (hereinafter sometimes simply referred to as "system") of the first aspect defined in this way, the data acquisition period is set so that vehicle travel data can be acquired from a plurality of probe cars. It is desirable to be set, and multiple vehicle travel data may be acquired from the same probe during the same period. That is, a plurality of vehicle travel data are obtained from the data acquisition period. A plurality of vehicle travel data obtained during the data acquisition period are set as a vehicle travel data group.
Such vehicle travel data groups are sequentially, ie, serially processed according to a predetermined rule in a data processing apparatus using a general-purpose CPU. Here, the vehicle travel data group includes vehicle travel data that characterizes traffic information. For example, if there is a probe car having speed data of 30 km/h or more, it can be determined that there is no congestion in the section. The vehicle travel data (in this case, the travel speed is 30 km/h) characterizing the traffic information is called "key data".

If such key data exists, the traffic information of the target section can be specified based on the key data or only by the key data.
In the system according to the first aspect of the present invention, a data processing device is provided with a data processing section and a data reduction section to be processed. This data processing unit determines whether or not key data exists in the vehicle travel data group.

When the data processing unit determines that the key data exists, the processing target data reduction unit reduces the number of vehicle travel data to be processed by the data processing unit in the vehicle travel data group. This reduces the amount of vehicle travel data processed per unit time by the data processing device, thereby reducing the load on the system.
As a measure for reducing the number of vehicle travel data to be processed, when the data processing unit determines that key data exists in the vehicle travel data group, the processing target data reduction unit instructs the data processing unit to reduce the number of vehicle travel data. The traffic information is specified based on the key data without processing other vehicle travel data.

A second aspect of the invention is defined as follows. That is, in the system of the first aspect, the processing target data reduction unit includes a data supply unit that serially supplies the vehicle travel data of the vehicle travel data group to the data processing unit;
a supply control unit for controlling an amount of data supplied by the data supply unit when the supplied vehicle travel data corresponds to the key data.

According to the system of the second aspect defined in this way, the data supply unit sequentially (that is, serially) supplies the vehicle travel data to be processed from the vehicle travel data group to the data processing device. When the supplied vehicle travel data is determined to be key data by the data processing unit, all or part of subsequent supply of the vehicle travel data to the data processing unit is stopped. As a result, the number of vehicle travel data processed per unit time is reduced, thereby reducing the load on the system.

A third aspect of the present invention is defined as follows. That is, in the system defined in the second aspect, the data supply unit supplies the vehicle travel data in the vehicle travel data group to the data processing unit in order from newest to oldest.
In the system defined in the third aspect defined in this way, vehicle travel data is processed in order from the newest one, so it is possible to identify traffic information based on the latest key data. This allows the traffic information to be updated quickly.

A fourth aspect of the present invention is defined as follows. That is, in the system defined in any one of the first to third aspects, the data acquisition device further includes a data acquisition period control section that changes the data acquisition period.
In the system of the fourth aspect defined in this way, the data acquisition period can be changed by the data acquisition period control unit. As a result, an appropriate amount of vehicle travel data can be obtained according to the section of the road.

The number of vehicles traveling on the approach road, that is, the number of probe cars, changes depending on the location of the intersection and the time of day. By changing the period for acquiring the vehicle travel data by the data acquisition period control section, the number of vehicle travel data processed by the data processing device can be adjusted appropriately.
It is preferable to adjust the data acquisition period according to any traffic information.

A fifth aspect of the present invention is defined as follows. That is, in the system of the fourth aspect, the data acquisition period control section changes the data acquisition period based on the past history of processing results by the data processing device in the section.
According to the system of the fifth aspect defined in this way, one of the rules for changing the period by the period changing unit is defined. For example, in a section with a large history of traffic congestion identified by the data processing device, there is a high probability that many probe cars will stay in that section, so the data acquisition period is shortened. This is because, since there are many probe cars, a sufficient amount of vehicle travel data can be obtained even if the data acquisition period is shortened.

A sixth aspect of the present invention is defined as follows. That is, in the system defined in the fourth aspect, the data acquisition period control section changes the data acquisition period based on the processing result of the data processing device in a section near the section.
When looking at the first approach road to the first intersection (not congested), the second approach road of the second intersection (with the first approach road as the exit road) is located on the original side of the first approach road in the traveling direction. ) is not congested, the first approach is less likely to be congested. Therefore, when it is specified that the second approach road is not congested, it is possible to reduce the number of vehicle travel data required for determining whether or not the first approach road is congested. Therefore, in the system of the sixth aspect, the data acquisition period from the first approach road is shortened after the second approach road is identified as not congested.

A seventh aspect of the present invention is defined as follows and has the same effect as the first aspect.
A data processing device comprising: a data acquisition device for acquiring vehicle travel data during a data acquisition period in a section on a road; and a data processing device for processing a group of vehicle travel data acquired by the data acquisition device during the data acquisition period. is a vehicle travel data processing load reduction method using a vehicle travel data processing load reduction system comprising a data processing unit and a processing target data reduction unit,
causing the data processing unit to process the vehicle travel data group;
When the data processing unit determines that the group of vehicle travel data includes key data that satisfies a predetermined condition in the data reduction unit to be processed, the group of vehicle travel data is processed by the data processing unit. A vehicle travel data processing load reduction method for reducing the number of vehicle travel data.

The eighth aspect of the present invention is defined as follows and has the same effects as the second aspect.
In the method defined in the seventh aspect, the data processing device comprises a data processing section and a supply control section,
causing the data processing unit to serially supply the vehicle running data of the vehicle running data group to the data processing unit;
The supply control unit is caused to control the amount of subsequent data supplied by the data supply unit when the supplied vehicle travel data corresponds to the key data.

A ninth aspect of the present invention is defined as follows and has the same effect as the third aspect.
In the method defined in the eighth aspect, the data processing device comprises a data processing section and a supply control section,
causing the data processing unit to serially supply the vehicle running data of the vehicle running data group to the data processing unit;
The supply control unit is caused to control the amount of subsequent data supplied by the data supply unit when the supplied vehicle travel data corresponds to the key data.

A tenth aspect of the present invention is defined as follows and has the same effect as the fourth aspect.
In the method defined in any one of the seventh to ninth aspects, the data acquisition device comprises a data acquisition period control unit,
The data acquisition period control section is caused to change the data acquisition period.

The eleventh aspect of the present invention is defined as follows and has the same effect as the fifth aspect.
In the method defined in the tenth aspect, the data acquisition period control section is caused to change the data acquisition period based on the past history of processing results by the data processing device in the section.

A twelfth aspect of the present invention is defined as follows and has the same effect as the sixth aspect.
In the method defined in the tenth aspect, the data acquisition period control section is caused to change the data acquisition period based on the processing result of the data processing device in a section near the section.

A thirteenth aspect of the present invention is defined as follows and has the same effect as the seventh aspect.
A data processing device comprising: a data acquisition device for acquiring vehicle travel data during a data acquisition period in a section on a road; and a data processing device for processing a group of vehicle travel data acquired by the data acquisition device during the data acquisition period. causes a vehicle travel data processing load reduction system comprising a data processing unit and a processing target data reduction unit to execute a vehicle travel data processing load reduction method,
causing the data processing unit to process the vehicle travel data group;
When the data processing unit determines that the group of vehicle travel data includes key data that satisfies a predetermined condition in the data reduction unit to be processed, the group of vehicle travel data is processed by the data processing unit. Reduce the number of vehicle driving data,
A program for computers.

A fourteenth aspect of the present invention is defined as follows and has the same effect as the eighth aspect.
In the program defined in the thirteenth aspect, the data processing device comprises a data processing section and a supply control section,
causing the data processing unit to serially supply the vehicle running data of the vehicle running data group to the data processing unit;
The supply control unit is caused to control the amount of subsequent data supplied by the data supply unit when the supplied vehicle travel data corresponds to the key data.

A fifteenth aspect of the present invention is defined as follows and has the same effect as the ninth aspect.
In the program specified in the fourteenth aspect, the data supply unit is caused to sequentially supply the new vehicle travel data to the oldest vehicle travel data in the vehicle travel data group to the data processing unit.

A sixteenth aspect of the present invention is defined as follows and has the same effect as the tenth aspect.
In the program defined in any one of the thirteenth to fifteenth aspects, the data acquisition device comprises a data acquisition period control section,
The data acquisition period control section is caused to change the data acquisition period.

The seventeenth aspect of the present invention is defined as follows and has the same effect as the eleventh aspect.
In a program specified at a sixteenth station, the data acquisition period control unit is caused to change the data acquisition period based on the past history of processing results by the data processing device in the section.

The eighteenth aspect of the present invention is defined as follows and has the same effect as the twelfth aspect.
In the program defined in the sixteenth aspect, the data acquisition period control section is caused to change the data acquisition period based on the processing result of the data processing device in the section near the section.

FIG. 1 is a block diagram showing functions of a vehicle travel data processing load reduction system according to an embodiment of the present invention. FIG. 2 is a time chart showing the relationship between intervals and data acquisition periods. FIG. 3 is a flow chart showing the operation of the system of FIG. FIG. 4 is a flow chart showing an example of the processing of step 9 in the flow chart of FIG. FIG. 5 is a flow chart showing an example of processing in step 15 as well. FIG. 6 is a schematic diagram for explaining the operation of the flowchart of FIG. FIG. 7 is a schematic diagram for explaining the operation of the flowchart of FIG. FIG. 8 is a block diagram showing functions of a vehicle travel data processing load reduction system according to another embodiment of the present invention. FIG. 9 is a flow chart showing the operation of the system of FIG. FIG. 10 is a block diagram showing functions of a vehicle travel data processing load reduction system according to another embodiment of the present invention. FIG. 11 is a flow chart showing the operation of the system of FIG. FIG. 12 is a schematic diagram for explaining the operation of the flow chart of FIG. FIG. 13 is a block diagram showing the hardware configuration of the system of FIG.

The present invention will be described in more detail below with reference to the drawings.
FIG. 1 is a block diagram showing functions of a vehicle travel data processing load reduction system 1 according to an embodiment of the present invention. This system 1 comprises a data acquisition device 10 , a data processing device 20 and a processing reduction device 30 .
The data acquisition device 10 acquires, from the vehicle travel data storage unit 3, vehicle travel data of probe cars that existed during a predetermined data acquisition period for the section on the road designated by the section designation unit 70. FIG.

The vehicle travel data storage unit 3 is, for example, a server set outside, and stores all vehicle travel data obtained from probe cars in this storage unit 3 .
A section designating unit 70 designates a section on the road. As a method of designation, in addition to manual designation by an operator, automatic designation based on a predetermined rule using a computer device is also possible.
Sections here refer to sections on the road where traffic information such as congestion information is required to be created, such as approach roads to intersections, highways, roads near large stores and event venues, and roads where traffic congestion occurs frequently. is mentioned. These intervals can be set arbitrarily.
The section can be specified in units of lanes of the road.

The data acquisition device 10 acquires the vehicle driving data of the probe car that existed during the data acquisition period of the time width determined based on the data acquisition period signal from the data acquisition period control unit 31 for the section specified by the section specifying unit 70. , is read from the vehicle running data storage unit 3 .
In addition to probe data (positional information and time information) generally obtained from probe cars, vehicle inner data of probe cars also correspond to the vehicle travel data. Here, the vehicle internal data is data related to various states of the vehicle that are output from the sensors, control unit, etc. provided in the vehicle, and is transmitted over the network installed in the vehicle, including the CAN (Controller Area Network). data that can be transmitted using various communication protocols. This vehicle inner data includes traveling speed data, brake operation data, steering angle data, and other information.
The type of vehicle travel data read by the data acquisition device 10 is appropriately selected according to the desired traffic information.

After the acquisition of the vehicle travel data in the first data acquisition period is completed, the vehicle travel data is acquired again at intervals based on the interval signal from the interval control unit 33 for the specified section. Hereafter, this is repeated.
The vehicle travel data acquired by the data acquisition device 10 is temporarily stored in the data storage unit 21 of the data processing device 20 . This vehicle travel data is all the travel data from the probe cars that existed in the specified section for a predetermined period (data acquisition period), and there are a plurality of such vehicle travel data. Such a series of vehicle travel data is called a vehicle travel data group.

From the vehicle travel data group stored in the data storage unit 21 , the data supply unit 23 sequentially supplies each vehicle travel data to the data processing unit 25 . The supply control unit 27 controls the data supply unit 23 to supply the vehicle travel data to the data processing unit 25 or stop the supply. The data supply unit 23 and the supply control unit 27 constitute a data reduction unit to be processed.
The data processing unit 25 processes the supplied vehicle travel data using a general-purpose technique to identify traffic information for the specified section.

When dealing with congestion information as traffic information, it is possible to specify that there is no congestion based only on the key data included in the vehicle travel data. Here, the running speed of 30 km/h can be used as key data. This is because a running speed of 30 km/h or more suggests that the vehicle is running normally.

The processing result of the data processing section 25 is sent to the output section 80 . Through the display included in the output unit 80, the operator is presented with traffic information such as traffic jam information as a processing result. Traffic information is sent from the output unit 80 to the map server via an interface (not shown) and reflected in the map data. Map data reflecting this traffic information is provided to an automatic driving device and a navigation device.
The processing result of the data processing section 25 is sent to the supply control section 27 and the processing reduction device 30 .

The processing reduction device 30 includes a data acquisition period control section 31 , an interval control section 33 , a data processing control section 35 and a processing reduction control section 37 .
The data acquisition period control unit 31 sends a data acquisition period signal that defines the data acquisition period to the data acquisition device 10 . The data acquisition period control unit 31 includes a reference data acquisition period storage unit 32 . The reference data acquisition period T1 is stored in the reference data acquisition period storage unit 32, and the data acquisition period in the default state is defined.

The interval control unit 33 sends an interval signal that defines the interval to the data acquisition device 10 . The interval control section 33 has a reference interval storage section 34 . The reference interval P1 is saved in the reference interval storage unit 34, and the interval in the default state is defined.
That is, after completing the acquisition of the vehicle travel data group, the data acquisition device 10 acquires the vehicle travel data group of the probe cars that stayed in the same section during the reference data acquisition period at a reference interval.

For the reference interval, for example, a time chart format can be adopted as shown in FIG. That is, with the start point (t0) being the point at which the section is designated, the points (t1, t2, . stipulate. Vehicle travel data is acquired for a time width defined by the reference data acquisition period T1 from each time point.

A data processing control signal is sent from the data processing control section 35 to the supply control section 27 . The supply control section 27 controls the data supply section 23 based on this data processing control signal.
Based on the output result of the data processing section 25, the processing reduction control section 37 sends a control signal to at least one of the data acquisition period control section 31, the interval control section 33 and the data processing control section 35 to control it.

The operation of the system 1 shown in FIG. 1 will be described below with reference to the flowchart of FIG.
In step 1, a section of the road is specified by the section specifying section 70 .
In step 3, an interval is specified based on the interval signal from the interval control section 33. FIG. As shown in FIG. 2, no interval is provided when a section is designated (start time: t0). After that, vehicle travel data is acquired at time points (t1, t2, . . . ) determined based on the specified intervals.
In step 5 , the data acquisition period is specified based on the data acquisition period signal from the data acquisition period control section 31 .

In step 7, the data acquisition device 10 reads the vehicle travel data group from the specified section from the time specified in step 3 to the data acquisition period specified in step 5 from the vehicle travel data storage unit 3. The read vehicle travel data group is stored in the data storage unit 21 .
In step 9, the vehicle travel data group read out in step 7 is processed to identify whether or not the designated section is congested. In this example, congestion information is used as the traffic information, but any other traffic information such as traffic regulation and speed regulation can be specified.

In step 9, all vehicle travel data in the vehicle travel data group acquired in step 7 can be processed.
Regarding traffic congestion information, it is possible to specify whether or not there is traffic congestion using part of the vehicle travel data group. This reduces the amount of data to be processed, thereby reducing the load on the system.

An example is shown in FIG.
In step 91 , the data supply unit 23 supplies vehicle travel data to the data processing unit 25 in order from the newest data in the vehicle travel data group stored in the data storage unit 21 .
At step 93, it is determined whether or not the vehicle running data supplied to the data processing unit 25 corresponds to key data. The key data here is a traveling speed of 30 km/h or more. This is because if the traveling speed is 30 km/h, there is a high possibility that there is no congestion.

In step 93 , when the vehicle running data sent to the data processing section 25 corresponds to the key data, the data processing section 25 sends a signal to that effect to the supply control section 27 . The supply control unit 27 controls the data supply unit 23 to stop supplying data after the key data (step 95).
In step 11 , it is specified that the section is congested based only on the presence of the key data, and the congested information is output from the output section 80 to the outside and sent to the processing reduction control section 37 .
In step 93, when there is no key data in the group of vehicle travel data sent to the data processing unit 25, all of the group of vehicle travel data is processed to determine whether or not the section is congested. (step 99).

In the above example, the vehicle travel data in the vehicle travel data group is supplied to the data processing unit in order from newest, but the supply order can be set arbitrarily. When the supplied vehicle running data is key data, all subsequent supply of vehicle running data is stopped, but it is also possible to limit the number of vehicle running data to be supplied thereafter. In this case, if the key data is included in the vehicle running data sent after that, the process proceeds to step 11 . If there is no key data in the vehicle running data sent after that, the process proceeds to step 99 .

Returning to FIG. 3, when it is specified that the section is congested (step 9; YES), the congestion information is sent to the output unit 80 and the processing reduction control unit 37 in step 11. FIG. Even when the section is not congested (step 9; No), the information is sent to the output unit 80 and the processing reduction control unit 37 in step 13.
The output unit 80 outputs the sent traffic jam information to the outside. The form of the output is shown to the operator via a display, or the data is transmitted to an external server so as to be reflected in the map data used in the navigation system or the like.

The processing reduction processing unit 37 determines a data processing reduction method based on the transmitted traffic congestion information.
The flowchart of FIG. 5 shows an example of a procedure for determining a data processing reduction method.
The processing reduction processing unit 37 acquires traffic congestion information in step 151 , and proceeds to step 155 when the congestion information indicates that there is no traffic congestion (step 153 ; No). At step 155, the processing reduction control section 37 controls the interval control section 33 so as to lengthen the reference interval P1. As a result, the number of vehicle travel data processed per unit time can be reduced. On the other hand, when it is specified that there is a traffic jam, the processing reduction control unit 37 does not change the reference interval P1 at all.

FIG. 6 shows an example of lengthening the reference interval P1. In FIG. 6, approach roads L11 and L12 to an intersection are taken up as an example of sections.
As a result of processing the vehicle travel data group (first vehicle travel data group) acquired at time t0 when the section is designated, it is assumed that the approach road L11 is not congested and the approach road L12 is congested.

According to the time chart of FIG. 2, at the point in time (t1) after the reference interval has passed, the acquisition of the vehicle travel data group (second vehicle travel data group) is executed for each of the approach roads L11 and L12. show). In this example, data acquisition at time t1 is omitted for approach road L11 with no traffic congestion (indicated by check marks in the figure). On the other hand, for the congested approach road L12, data acquisition is executed as planned at time t2.
At time t2, data acquisition is also executed for approach road L11.

In the example of FIG. 6, the interval is lengthened by skipping data acquisition, but the length of the reference interval P1 itself may be changed (see FIG. 7). For example, when the reference interval P1 is 1 hour, the lengthened interval P1 ⁺ is 1 hour and 30 minutes. The interval P1 ⁺ can be set arbitrarily.

Returning to FIG. 5, when it is determined that the section is congested (step 153; Y), in step 157, the reference data acquisition period T1 is shortened ^to T1-. For example, when the reference data acquisition period T1 is set to 10 minutes, half this period of 5 minutes can be set ^to T1-.
The processing reduction control unit 37 executes the shortened data acquisition period at the time of the next data acquisition (time t1 from time t0 and time t2 from time t1 in the example of FIG. 6). The data acquisition period control unit 31 is controlled as follows.

In the above examples, the number of pieces of vehicle travel data processed per unit time is reduced by lengthening the interval and/or shortening the data acquisition period. In other words, the data acquisition device 10 is controlled to reduce the amount of data to be supplied to the data processing device 20, thereby reducing the processing by the data processing device 20. FIG.
In addition, the data processing control unit 35 can control the operation of the data processing device 20 to reduce its load. For example, when the processing reduction control unit 37 receives a traffic jam signal, the supply control unit 27 is operated via the data processing control unit 35, and vehicle travel data is supplied from the data storage unit 21 to the data processing unit 25. or to reduce the amount of vehicle driving data supplied.

FIG. 8 shows a vehicle travel data processing load reduction system 100 of another embodiment. In FIG. 8, the same elements as those in FIG. 1 are given the same reference numerals, and the description thereof is omitted.
In this system 100 , the processing reduction control section 37 of the processing reduction device 30 is provided with a history storage section 371 . The history storage unit 371 stores a history of past traffic jam information in a specified section by executing steps 161 and 162 in FIG.

When it is determined in step 153 that there is traffic congestion, the history of past traffic congestion in that section is read, and when it is determined that the frequency of traffic congestion is high (step 165; Y), the process proceeds to step 157 to acquire data. Shorten the period. This is because when such frequency is high, there is a high possibility that the traffic jam is maintained, and in a traffic jam state, a sufficient amount of vehicle travel data can be acquired in a short period of time. On the other hand, when it is determined that the frequency of traffic congestion is low (step 165; N), the data acquisition period is maintained. This is to ensure a sufficient amount of vehicle travel data even when the congestion is resolved. Here, the frequency of traffic congestion can be defined as high when the ratio of identified traffic congestion at the past several dozen data acquisition points (tn) exceeds 50%.
In FIG. 9, steps that perform the same operations as those in FIG.

FIG. 10 shows a vehicle travel data processing load reduction system 200 according to another embodiment. In FIG. 10, the same elements as in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.
In this system 200 , the processing reduction control section 37 of the processing reduction device 30 is provided with a neighboring section information storage section 373 . The neighboring section information storage unit 373 stores congestion information of neighboring sections.
FIG. 12 shows an example of neighboring sections. These neighboring sections L21 and L22 are entrance roads of intersections located on the approach direction source side of the designated sections of the entrance roads L11 and L12, and their exit roads continue to the entrance roads L11 and L12.

If the adjacent sections L21 and L22 are congested at time t1 (A), the designated sections L11 and L12 may also be congested at time t2. Therefore, as shown in FIG. 11, in sections L11 and L12, even if congestion is not specified at time t1 (step 153; N), if congestion is specified in the neighboring section (step 171: Y), step Proceed to 174 to maintain the reference interval P1 and not lengthen it. On the other hand, if no congestion is identified in the neighboring section (step 171:N), the process proceeds to step 175, where the reference interval P1 can be lengthened as shown in FIG. 12(B). In this example, data acquisition for approach roads L11 and L12 at time t2 is omitted.

Returning to FIG. 12, at time t1, when it is specified that the designated sections L11 and L12 are congested and the adjacent sections L21 and L22 are also congested (step 172; Y), at time t2, the designated It is possible to shorten the data acquisition period in the sections L11 and L12 (step 178). This is because there is a high possibility that traffic congestion will be maintained in the sections L11 and L12 as well. On the other hand, when it is determined that the neighboring sections L21 and L22 are not congested, the data acquisition period is not shortened (step 177). This is because there is a possibility that congestion will be resolved in the sections L11 and L12.

FIG. 13 shows the hardware configuration of the vehicle travel data processing load reduction system.
A computing unit 300 includes a CPU 301, a ROM 303 and a RAM 305, and controls the entire system. At the same time, it functions as respective control units 31 , 33 , 35 and 37 of the data acquisition device 10 , the data processing device 20 and the processing reduction device 30 . A ROM 303 is a non-volatile memory that stores control programs and the like for controlling the arithmetic unit 300 . The RAM 305 readablely stores various setting values preset by the user via an input device 330 such as a keyboard, and provides a working area for the CPU 301 . The control program for controlling the arithmetic unit 300 may be stored in the RAM 305 or the first and second storage devices 340 and 350 instead of the ROM 303 . The output device 320 functions as the output section 80 . The input device 330 functions as the section specifying section 70 .

The first storage device 340 functions as the reference data acquisition period storage unit 32 and the reference interval storage unit 34 .
The second storage device 350 functions as the data storage section 21 .
Preferably, the first and second storage devices use a partial area of the memory device of the server system, such as hard memory or flash memory.

A partial area of the RAM of the computing unit can be used as a so-called buffer memory for temporarily storing data.
The output device 320 is a display or a voice output device, and the input device 330 corresponds to a voice input unit, a touch-panel keyboard or mouse arranged over the display, or the like.
Via the communication interface 360, it becomes possible to communicate with the vehicle travel data storage unit 3 and other external servers.
Each device constituting the computer is connected by a system bus 370 .

The present invention is by no means limited to the description of the above embodiments, examples, and modifications. Various modifications are also included in the present invention within the scope of those skilled in the art without departing from the description of the claims.

1, 100, 200 Vehicle traveling data processing load reduction system 10 Data acquisition device 20 Data processing device 23 Data supply unit 25 Data processing unit 30 Processing reduction device 31 Data acquisition period control unit 33 Interval control unit P1 Interval

Claims (18)

a data acquisition device for acquiring vehicle travel data during a data acquisition period in a section on a road;
A vehicle travel data processing load reduction system comprising a data processing device that processes the vehicle travel data group acquired by the data acquisition device during the data acquisition period,
The data processing device includes a data processing unit that processes the vehicle travel data group;
A process of reducing the number of vehicle travel data to be processed by the data processing unit in the vehicle travel data group when the data processing unit determines that the vehicle travel data group includes key data that satisfies a predetermined condition. A vehicle travel data processing load reduction system comprising: a target data reduction unit; The processing target data reduction unit includes a data supply unit that serially supplies the vehicle travel data of the vehicle travel data group to the data processing unit;
2. The system according to claim 1, further comprising a supply control unit for controlling an amount of data supplied by said data supply unit when the supplied vehicle travel data corresponds to said key data. 3. The system according to claim 2, wherein said data supply unit sequentially supplies newer vehicle travel data to older vehicle travel data in said vehicle travel data group to said data processing unit. 4. The system according to any one of claims 1 to 3, wherein said data acquisition device further comprises a data acquisition period control section for changing said data acquisition period. 5. The system according to claim 4, wherein the data acquisition period control unit changes the data acquisition period based on a past history of processing results by the data processing device in the section. 5. The system according to claim 4, wherein the data acquisition period control unit changes the data acquisition period based on a processing result of the data processing device in a section near the section. A data processing device comprising: a data acquisition device for acquiring vehicle travel data during a data acquisition period in a section on a road; and a data processing device for processing a group of vehicle travel data acquired by the data acquisition device during the data acquisition period. is a vehicle travel data processing load reduction method using a vehicle travel data processing load reduction system comprising a data processing unit and a processing target data reduction unit,
causing the data processing unit to process the vehicle travel data group;
When the data processing unit determines that the group of vehicle travel data includes key data that satisfies a predetermined condition in the data reduction unit to be processed, the group of vehicle travel data is processed by the data processing unit. A vehicle travel data processing load reduction method for reducing the number of vehicle travel data. The data processing device comprises a data processing section and a supply control section,
causing the data processing unit to serially supply the vehicle running data of the vehicle running data group to the data processing unit;
8. The method according to claim 7, further comprising causing the supply control unit to control the amount of subsequent data supplied by the data supply unit when the supplied vehicle travel data corresponds to the key data. 9. The method according to claim 8, wherein said data supply unit sequentially supplies newer vehicle travel data to older vehicle travel data in said vehicle travel data group to said data processing unit. The data acquisition device comprises a data acquisition period control unit,
10. The method according to any one of claims 7 to 9, wherein the data acquisition period control section is caused to change the data acquisition period. 11. The method according to claim 10, wherein the data acquisition period control unit changes the data acquisition period based on a past history of processing results by the data processing device in the section. 11. The method according to claim 10, wherein the data acquisition period control unit is caused to change the data acquisition period based on the processing result of the data processing device in a section near the section. A data processing device comprising: a data acquisition device for acquiring vehicle travel data during a data acquisition period in a section on a road; and a data processing device for processing a group of vehicle travel data acquired by the data acquisition device during the data acquisition period. causes a vehicle travel data processing load reduction system comprising a data processing unit and a processing target data reduction unit to execute a vehicle travel data processing load reduction method,
causing the data processing unit to process the vehicle travel data group;
When the data processing unit determines that the group of vehicle travel data includes key data that satisfies a predetermined condition in the data reduction unit to be processed, the group of vehicle travel data is processed by the data processing unit. Reduce the number of vehicle driving data,
A program for computers. The data processing device comprises a data processing section and a supply control section,
causing the data processing unit to serially supply the vehicle running data of the vehicle running data group to the data processing unit;
14. The program according to claim 13, causing said supply control unit to control the amount of subsequent data supplied by said data supply unit when the supplied vehicle travel data corresponds to said key data. 15. The program according to claim 14, causing said data supply unit to sequentially supply newer vehicle travel data to older vehicle travel data in said vehicle travel data group to said data processing unit. The data acquisition device comprises a data acquisition period control unit,
16. The program according to any one of claims 13 to 15, causing the data acquisition period control unit to change the data acquisition period. 17. The program according to claim 16, causing the data acquisition period control unit to change the data acquisition period based on a past history of processing results by the data processing device in the section. 17. The program according to claim 16, causing said data acquisition period control unit to change said data acquisition period based on the processing result of said data processing device in a section near said section.

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