JP6171479B2 - Travel data acquisition device - Google Patents

Description

  The present invention relates to a travel data acquisition device.

  Conventionally, as a traveling data acquisition device, for example, there is a conventional technique described in Patent Document 1. In this prior art, the travel data acquisition device acquires travel data that is data representing the travel state of the host vehicle. Subsequently, the travel data acquisition device transmits the acquired travel data to the collection server. An example of the collection server is a server owned by a data center. As a result, the data center collects the travel data in the collection server (data center).

JP 2007-287172 A

However, in the above prior art, the travel data acquisition device simply transmits the travel data to the collection server. Therefore, in the above prior art, for example, when the travel data is collected in detail, the travel data transmitted from the travel data acquisition device to the collection server is increased, and the communication amount between the travel data acquisition device and the collection server is increased. There was a possibility of increase. Therefore, in the above prior art, the total amount of communication between the data center and the collection server (hereinafter also referred to as the total communication amount) is the contracted communication amount, that is, a set period (for example, between the data center and the communication carrier) There is a possibility of exceeding the set upper limit of the communication amount set every 1 month).
An object of the present invention is to make it possible to suppress the total communication amount from exceeding a set upper limit while paying attention to the above points and collecting necessary travel data in detail.

  In order to solve the above-described problem, in one aspect of the present invention, travel data that is data representing a travel state of the host vehicle is acquired. Subsequently, in one aspect of the present invention, the acquired travel data is transmitted to the collection server. At that time, in one aspect of the present invention, the remaining communication amount that is the difference between the total communication amount and the set upper limit value of the total communication amount in the setting period is detected. In one aspect of the present invention, the acquisition interval of the travel data to be transmitted is adjusted based on the detected remaining communication amount.

  In one aspect of the present invention, the acquisition interval of the travel data to be transmitted is adjusted based on the difference between the total communication amount and the set upper limit value of the total communication amount during the setting period. Thereby, in 1 aspect of this invention, it can suppress that total communication amount exceeds a setting upper limit, collecting required traveling data in detail.

It is a figure which shows schematic structure of the driving | running | working data collection system. It is a figure showing a compression recording table. It is a figure for demonstrating a regular road. It is a figure for demonstrating a compression recording table. It is a figure showing the resolution instruction | indication table. It is a figure for demonstrating the resolution instruction | indication table. It is a figure showing the resolution instruction | indication table. It is a figure for demonstrating the resolution instruction | indication table. It is a figure showing a comprehensive contracting party total communication volume recording table. It is a figure for demonstrating a comprehensive contracting party total communication amount recording table. It is a flowchart showing a driving | running | working data storage process. It is a flowchart showing a table update process. It is a figure for demonstrating the setting result of resolution. It is a figure for demonstrating the setting result of resolution. It is a flowchart showing a comprehensive contractee total communication amount recording table update process. It is a figure for demonstrating the setting result of resolution. It is a figure for demonstrating the effect of a modification. It is a figure showing a comprehensive contracting party total communication volume recording table.

Next, embodiments of the present invention will be described with reference to the drawings.
The in-vehicle device 1 according to the present embodiment is a device that acquires travel data that is data representing the travel state of the host vehicle A, and transmits the acquired travel data to the collection server 2.
(Constitution)
FIG. 1 is a diagram showing a schematic configuration of a travel data collection system S. As shown in FIG.
As shown in FIG. 1, the travel data collection system S includes an in-vehicle device 1 mounted on a plurality of vehicles A, a collection server 2 included in a data center B, and a communication load monitoring unit 18 included in a communication carrier C. The in-vehicle device 1 and the collection server 2 perform transmission / reception of information via a communication path that the communication carrier C has. Examples of the communication path include a mobile phone network, a wireless LAN (Local Area Network) network, a DSRC (Dedicated Short Range Communications) network, and a power line communication network. As the communication path, for example, each of the in-vehicle device 1 and the collection server 2 records information in a removable storage medium such as a flash memory, and transmits and receives the recorded information via a terminal having a communication function. It is good also as composition to do. Currently, there are many communication channels as described above that have no upper limit on the amount of communication data for a unit period (per month, per day, etc.) in a contract with the communication carrier C (unlimited flat-rate contract). However, in view of the fact that there is a high possibility that an upper limit is imposed as data needs in the future increase, the present embodiment assumes that an upper limit is set in advance for the amount of communication data with the communication carrier C. .

(Configuration of in-vehicle device 1)
The in-vehicle device 1 includes an accelerator state detection unit 3, a brake state detection unit 4, a vehicle speed detection unit 5, a direction detection unit 6, an altitude detection unit 7, a switch state detection unit 8, and a driver detection unit 9. The position detection unit 10 is provided.
The accelerator state detection unit 3 detects the operation state of the accelerator pedal of the host vehicle A. And the accelerator state detection part 3 outputs the information of a detection result to the vehicle control part 11 mentioned later.
The brake state detection unit 4 detects the operation state of the brake pedal of the host vehicle A. Then, the brake state detection unit 4 outputs information on the detection result to the vehicle control unit 11.
The vehicle speed detector 5 detects the vehicle speed of the host vehicle A. Then, the vehicle speed detection unit 5 outputs information on the detection result to the vehicle control unit 11.

The direction detection unit 6 detects the traveling direction of the host vehicle A. Then, the direction detection unit 6 outputs detection result information to the vehicle control unit 11.
The altitude detector 7 detects the traveling altitude of the host vehicle A. Then, the altitude detection unit 7 outputs detection result information to the vehicle control unit 11.
The switch state detection unit 8 detects the switch state of the ignition switch of the host vehicle A. Examples of the switch state include an on state and an off state. Then, the switch state detection unit 8 outputs detection result information to the vehicle control unit 11.

The driver detection unit 9 detects the driver ID (Identification) of the driver of the host vehicle A. Examples of the driver ID include an alphanumeric string for uniquely identifying the driver. Then, the driver detection unit 9 outputs detection result information to the vehicle control unit 11.
The position detection unit 10 detects the current position (for example, latitude and longitude) of the host vehicle A based on a GPS signal transmitted by a GPS (Global Positioning System) satellite. And the position detection part 10 outputs the information of a detection result to the navigation apparatus 12 mentioned later.

The in-vehicle device 1 includes a vehicle control unit 11, a navigation device 12, and a travel data storage unit 13.
The vehicle control unit 11 acquires information output by the accelerator state detection unit 3, the brake state detection unit 4, the vehicle speed detection unit 5, the direction detection unit 6, the altitude detection unit 7, the switch state detection unit 8, and the driver detection unit 9. To do. And the vehicle control part 11 controls each part of the own vehicle A based on the acquired information. Examples of the control target include an accelerator opening, a brake cylinder pressure, and the like. Further, the vehicle control unit 11 outputs the acquired information to the travel data storage unit 13.

  The navigation device 12 acquires the information output from the position detection unit 10 (the current position of the host vehicle A). Further, the navigation device 12 sets the destination of the host vehicle A. As a method for setting the destination of the host vehicle A, for example, there is a method of setting based on a driver's operation. Then, the navigation device 12 sets a guide route from the current position (departure point) of the own vehicle A to the destination based on the acquired information (current position of the own vehicle A) and the set destination. Subsequently, the navigation device 12 guides the host vehicle A along the set guidance route. As a guide method for the host vehicle A, for example, there is a method of presenting the driver with guide information that is information for driving the host vehicle A along the guide route. In addition, the navigation device 12 outputs the acquired information (current position of the host vehicle A) and the guidance route to the travel data storage unit 13.

  The travel data storage unit 13 executes a travel data storage process based on information output from the vehicle control unit 11 and the navigation device 12. In the travel data storage process, the travel data storage unit 13 is based on the information output from the vehicle control unit 11 and the navigation device 12 and represents data indicating the travel state of the host vehicle A (hereinafter also referred to as travel data), the host vehicle A. Information (hereinafter also referred to as vehicle ID), the current day of the week, and the current time zone are sequentially stored in the travel data storage unit 13. The travel data includes, for example, the current position of the host vehicle A, the vehicle speed of the host vehicle A, the traveling direction of the host vehicle A, and the travel altitude of the host vehicle A. Then, the travel data storage unit 13 transmits the stored travel data, vehicle ID, current day of the week, and current time zone to the collection server 2. At that time, the travel data storage unit 13 associates the travel data, the vehicle ID, the current day of the week, and the current time zone. Details of the running data storage process will be described later.

  The collection server 2 includes a usage history accumulation unit 14, a history statistics unit 15, a regular road detection unit 16, and a probe data resolution control unit 17. The usage history accumulation unit 14, the history statistics unit 15, the regular road detection unit 16, and the probe data resolution control unit 17 perform table update processing based on the travel data transmitted by the in-vehicle device 1. In the table update process, the usage history storage unit 14 sequentially receives the travel data, the vehicle ID, the current day of the week, and the current time zone transmitted by the in-vehicle device 1. In the table update process, the usage history storage unit 14 sequentially stores the received travel data, vehicle ID, current day of the week, and current time zone in the usage history storage unit 14.

  Further, in the table update process, the history statistics unit 15, the regular road detection unit 16, and the probe data resolution control unit 17 are based on the travel data stored in the usage history storage unit 14 and will be described later as a compression recording table and a resolution instruction table. Is generated. Then, the probe data resolution control unit 17 transmits the generated compression recording table and resolution instruction table to the in-vehicle devices 1 of the plurality of vehicles A. Details of the travel history statistical processing will be described later.

  The communication load monitoring unit 18 executes a comprehensive contract partner total communication amount record table update process based on the amount of information transmitted / received between the in-vehicle devices 1 and the collection server 2 of the plurality of vehicles A (hereinafter also referred to as communication amount). . In the comprehensive contract partner total communication amount record table update process, the communication load monitoring unit 18 includes a comprehensive contract partner total communication amount record table, which will be described later, based on the communication amount between the in-vehicle device 1 and the collection server 2 of the plurality of vehicles A. Is generated. Then, the communication load monitoring unit 18 stores the generated comprehensive contract partner total communication amount recording table in the communication load monitoring unit 18. In addition, the communication load monitoring unit 18 transmits the generated comprehensive contract partner total communication amount recording table to the in-vehicle devices 1 of the plurality of vehicles A. Details of the comprehensive contract partner total communication amount record table update processing will be described later.

FIG. 2 shows a compression recording table.
FIG. 3 is a diagram for explaining a regular road.
FIG. 4 is a diagram for explaining the compression recording table.
The regular road detector 16 generates a compressed recording table based on the travel data stored in the usage history storage unit 14. The compression recording table is generated for each vehicle A. As the compressed recording table, for example, as shown in FIG. 2, there is a table including a plurality of regular road designation information groups. Each of the plurality of regular road designation information groups is associated with one of the multiple regular roads. Each of the plurality of regular road designation information groups includes various types of information for identifying the corresponding regular road. As the regular road, for example, there is a road in which the traveling number of the vehicle A is equal to or more than a set number (for example, 20 times). As shown in FIG. 3A, the regular road includes a plurality of roads that divide the guide route from the departure point to the destination, and a road of the guide route as shown in FIG. is there. The number of travels is counted for each combination of vehicle ID, day of the week, and time zone. The vehicle ID includes, for example, an alphanumeric string for uniquely identifying the vehicle A. Specifically, the service road designation information group includes, for example, a vehicle ID, a path ID, a start point position, an end point position, an inclusion point sequence, a day of the week, and a time zone. As the path ID, as shown in FIG. 4, for example, there is an alphanumeric string or the like for uniquely specifying a regular road. The path ID represents, for example, that the vehicle A is traveling on a regular road and is based on travel data acquired every first set time (for example, 30 [sec]) while traveling on the regular road. The data amount is small. Moreover, as a starting point position, there exists the position (for example, latitude longitude) of the starting point of a corresponding regular road, for example. Furthermore, as the end point position, for example, there is a position (for example, latitude and longitude) at the end of the corresponding regular road. Moreover, as an inclusion point row | line | column, there exists the position (for example, latitude longitude) of each point on a corresponding regular road, for example. Furthermore, as a day of the week, for example, there is a day of the week on a corresponding regular road. Moreover, as a time slot | zone, there exists a time slot | zone which drive | worked the corresponding regular road, for example.

In the present embodiment, an example is shown in which the number of travels is counted for each vehicle ID, day of the week, and time zone when specifying a regular road. However, other configurations may be employed. For example, in addition to vehicle ID, day of the week, and time zone, the number of trips is counted from January to December, every spring / summer / autumn / winter (season), morning / day / night, and sunny / rainy / cloudy (weather) A configuration may be adopted.
Further, in the present embodiment, an example in which the vehicle ID is included as the regular road designation information group is shown, but other configurations may be employed. For example, a configuration including a driver ID may be employed.

FIG. 5 is a diagram illustrating a resolution instruction table.
FIG. 6 is a diagram for explaining the resolution instruction table.
The probe data resolution control unit 17 generates a resolution instruction table based on the travel data stored in the usage history storage unit 14. Some resolution instruction tables include a plurality of resolution instruction information groups as shown in FIG. 5, for example. Each of the plurality of resolution instruction information groups is associated with one of a plurality of setting sections divided by a lattice-shaped boundary extending along the latitude direction and the longitude direction. Each of the plurality of resolution instruction information groups includes various information for setting the corresponding setting section to either the low resolution instruction area or the high resolution instruction area. As the low-resolution instruction area, for example, when it is determined that the vehicle A is traveling on a regular road, a path ID (hereinafter also referred to as alternative data) is transmitted to the collection server 2, and the vehicle A is other than the regular road. When it is determined that the vehicle is traveling, there is a region where traveling data acquired every first set time (for example, 30 [sec]) is transmitted to the collection server 2. In addition, as the high-resolution instruction area, for example, regardless of whether or not the vehicle A is traveling on a regular road, traveling data collected every second set time (for example, 1 [sec]) is collected by the collection server 2. There is an area to send to. Specifically, the resolution instruction information group includes, for example, Min, Max, resolution, and time zone. As Min, as shown in FIG. 6, for example, there is a latitude / longitude of a corner portion having a minimum latitude / longitude in the corresponding setting section. In addition, as Max, for example, there is a latitude / longitude of a corner portion having a maximum latitude / longitude in the corresponding setting section. Further, the resolution includes, for example, low and high. As low, for example, there is one that sets a corresponding setting section as a low resolution instruction area. Moreover, as high, there exists what sets a corresponding setting division to a high-resolution instruction | indication area, for example. As will be described later, when the contract communication remaining amount described later is equal to or greater than a set value (for example, 1/4 of the contract communication volume), the resolution of all resolution instruction information groups (setting sections) becomes high. . In addition, when the contract communication remaining amount is less than the set value (1/4 of the contract communication amount), the resolution of the resolution instruction information group (set section) includes both high and low.

  In the present embodiment, the example in which the latitude and longitude of the corners of the setting section are included in the resolution information group is shown, but other configurations may be employed. For example, the section ID used in the navigation device 12 may be included in the resolution information group. Examples of the section ID used in the navigation device 12 include a mesh code, a piano code, and a geohash.

FIG. 7 is a diagram illustrating a resolution instruction table.
FIG. 8 is a diagram for explaining the resolution instruction table.
Further, in the present embodiment, an example is shown in which each section that is partitioned by a lattice-shaped boundary extending along the latitude direction and the longitude direction is used as the setting section. However, other configurations may be employed. For example, each section formed by dividing a road may be used as a setting section. Specifically, as the resolution instruction information group, as shown in FIG. 7, for example, there is one that uses a start point position and an end point position in place of Min and Max. As the start point position, as shown in FIG. 8, for example, there is the latitude and longitude of the start point of the corresponding setting section (section). The end point position includes, for example, the latitude and longitude of the end point of the corresponding setting section (section).

FIG. 9 is a diagram illustrating a comprehensive contract partner total communication amount recording table.
FIG. 10 is a diagram for explaining the comprehensive contract partner total communication amount recording table.
The communication load monitoring unit 18 generates a comprehensive contract destination total communication amount recording table based on the communication amount between the in-vehicle device 1 and the collection server 2 of the plurality of vehicles A. As shown in FIG. 9, for example, the comprehensive contract partner total communication amount recording table includes a total communication amount designation information group. The total communication amount designation information group is associated with the current contract period. Here, the data center B and the communication carrier C are, for example, a predetermined communication amount (hereinafter also referred to as contracted communication amount) between all the in-vehicle devices 1 of the in-vehicle devices 1 of the plurality of vehicles A and the collection server 2. ) To be available monthly. Therefore, the contract period includes, for example, each month such as January, February,. For example, the contract period starts at the beginning of each month, and the contract period ends at the end of each month. The total communication amount designation information group includes various types of information for setting data to be transmitted from the in-vehicle devices 1 of the plurality of vehicles A to the collection server 2. Specifically, the total communication amount designation information group includes, for example, the total communication amount and the contract communication remaining amount. As the total communication amount, for example, as shown in FIG. 10, the communication amount between the in-vehicle device 1 and the collection server 2 of a plurality of vehicles A from the start (monthly start) of the current contract period to the present. There is a total value. The contract communication remaining amount includes, for example, a subtraction result obtained by subtracting the total communication amount from the contract communication amount.

(Calculation processing)
Next, the travel data storage process executed by the travel data storage unit 13 will be described. The travel data storage unit 13 executes a travel data storage process every time a predetermined set time (for example, 10 msec.) Elapses.
FIG. 11 is a flowchart showing a travel data accumulation process.
As shown in FIG. 11, in step S <b> 101, the travel data storage unit 13 determines whether or not the driver has started driving the host vehicle A. Specifically, the travel data storage unit 13 determines whether or not the ignition switch is on based on the information output from the switch state detection unit 8 (switch state of the ignition switch). Then, when it is determined that the ignition switch is on (Yes), the traveling data storage unit 13 determines that the driver has started driving the host vehicle A, and the process proceeds to step S102. On the other hand, when it determines with the ignition switch being an OFF state (No), the driving | running | working data storage part 13 determines with the driver | operator not starting the driving | operation of the own vehicle A, and complete | finishes this calculation process.

Then, it transfers to step S102 and the driving | running | working data storage part 13 acquires the compression recording table of the own vehicle A from the collection server 2 (usual road detection part 16) via a communication path.
Then, it transfers to step S103 and the driving | running | working data storage part 13 acquires the resolution instruction | indication table from the collection server 2 (probe data resolution control part 17) via a communication channel.

  Subsequently, the process proceeds to step S104, where the travel data storage unit 13 performs high resolution based on the resolution instruction table acquired in step S103, the information output from the navigation device 12 (current position of the host vehicle A), and the current time. It is determined whether there is a recording instruction. Specifically, the travel data storage unit 13 includes the corresponding setting section, that is, the setting section specified by Min and Max, among the plurality of resolution instruction information groups in the resolution instruction table. , The resolution is high, and there is a resolution information group whose time zone includes the current time, it is determined that there is a high resolution recording instruction. Here, when the contract communication remaining amount is equal to or greater than the set value (1/4 of the contract communication amount), the resolution of all resolution instruction information groups (set sections) is high. In addition, when the contract communication remaining amount is less than the set value (1/4 of the contract communication amount), the resolution of the resolution instruction information group (set section) includes both high and low. Therefore, when it is determined that there is no high resolution recording instruction, the traveling data storage unit 13 determines that the contract communication remaining amount is less than the set value (1/4 of the contract communication amount). When the travel data storage unit 13 determines that there is a high-resolution recording instruction (Yes), the travel data storage unit 13 determines that the contract communication remaining amount is any one of the set value (1/4 of the contract communication amount) and less than, or The process proceeds to step S105. On the other hand, when determining that there is no high resolution recording instruction (No), the traveling data storage unit 13 determines that the contract communication remaining amount is less than the set value (1/4 of the contract communication amount), and proceeds to step S106. .

  In step S105, the travel data storage unit 13 performs a high resolution recording process. In the high-resolution recording process, the travel data storage unit 13 sets the travel data, the vehicle ID, the current day of the week, and the current time zone to the second set time (1) based on the information output by the vehicle control unit 11 and the navigation device 12. Acquired and accumulated every [sec]). Then, the travel data storage unit 13 transmits the stored travel data, vehicle ID, current day of the week, and current time zone to the collection server 2. In the high-resolution recording process, the travel data storage unit 13 proceeds to step S109 when the set section where the host vehicle A exists changes, that is, when the host vehicle A moves to another set section.

  On the other hand, in step S106, the travel data storage unit 13 sets the travel data, the vehicle ID, the current day of the week, and the current time zone based on the information output from the vehicle control unit 11 and the navigation device 12 to the first set time ( Acquired and accumulated every 30 [sec]). The travel data storage unit 13 determines whether or not the host vehicle A is traveling on a regular road based on the compression record table acquired in step S102 and the stored travel data (current position of the host vehicle A). To do. Specifically, the travel data storage unit 13 has a vehicle ID that is the same as the vehicle ID of the host vehicle A among the plurality of regular road designation information groups in the compression record table, and from the line segment that passes through the inclusion point sequence. When the deviation degree of the time-series data of the current position of the host vehicle A is less than the set value, the day of the week is the same as the current day of the week, and there is a regular motion specific information group including the current time, the host vehicle A Is determined to be traveling on a regular road. Then, when the traveling data storage unit 13 determines that the host vehicle A is traveling on a regular road, that is, a road on which the traveling number of the host vehicle A is equal to or greater than the set number (20 times) (Yes), the process proceeds to step S107. . On the other hand, if the traveling data storage unit 13 determines that the host vehicle A is not traveling on a regular road (No), the traveling data storage unit 13 proceeds to step S108.

  In step S107, the travel data storage unit 13 performs a symbolized recording process. In the symbolized recording process, the traveling data storage unit 13 causes the host vehicle A to travel based on the compression recording table acquired in step S102 and the information output from the navigation device 12 (current position of the host vehicle A). Get the path ID that identifies the regular road. Subsequently, in the symbolized recording process, the travel data storage unit 13 stores the acquired path ID in the travel data storage unit 13. Then, the traveling data accumulation unit 13 transmits the accumulated path ID, vehicle ID, current day of the week, and current time zone to the collection server 2, and then proceeds to step S109.

  On the other hand, in step S108, the traveling data storage unit 13 performs a low resolution recording process. In the low-resolution recording process, the travel data storage unit 13 collects the accumulated travel data (travel data acquired every first set time (30 [sec])), vehicle ID, current day of the week, and current time zone. Then, the process proceeds to step S109.

  In step S109, the travel data storage unit 13 determines whether or not the driver has finished driving the host vehicle A. Specifically, the travel data storage unit 13 determines whether or not the ignition switch is in an OFF state based on the information output from the switch state detection unit 8 (switch state of the ignition switch). Then, when it is determined that the ignition switch is in the OFF state (Yes), the traveling data storage unit 13 determines that the driver has finished driving the host vehicle A, and ends this calculation process. On the other hand, when it determines with the ignition switch being an ON state (No), the driving | running | working data storage part 13 determines with the driver | operator not having complete | finished the driving | operation of the own vehicle A, and transfers to said step S101.

Next, a table update process executed by the usage history accumulation unit 14, the history statistics unit 15, the regular road detection unit 16, and the probe data resolution control unit 17 will be described. The usage history accumulation unit 14, the history statistics unit 15, the regular road detection unit 16, and the probe data resolution control unit 17 execute a table update process every time a predetermined set time (for example, 10 msec.) Elapses.
FIG. 12 is a flowchart showing the table update process.
As shown in FIG. 12, in step S201, the usage history storage unit 14 determines whether or not travel data, vehicle ID, day of the week, and time zone have been received. If the use history storage unit 14 determines that the travel data, vehicle ID, day of the week, and time zone have been received (Yes), the process proceeds to step S202. On the other hand, if it is determined that the travel data, vehicle ID, day of the week, and time zone have not been received (No), the usage history storage unit 14 executes this determination again.

In step S202, the usage history storage unit 14 stores the travel data, vehicle ID, day of the week, and time zone received in step S201 in the usage history storage unit 14.
Then, it transfers to step S203 and the history statistics part 15 performs a past data statistics process based on the driving | running | working data which the utilization history storage part 14 accumulate | stored. In the past data statistical process, the history statistical unit 15 calculates the current traffic flow and the past traffic flow. An example of the traffic flow is an average vehicle speed. The traffic flow is calculated for each combination of set section and time zone.
In the present embodiment, an example in which the average vehicle speed is used as the traffic flow has been described, but other configurations may be employed. For example, the fuel consumption of the vehicle A may be used as the traffic flow. In this case, as the travel data, data including the fuel consumption of the vehicle A is employed.

  Subsequently, the process proceeds to step S204, where the service road detection unit 16 determines whether there is a service road on the road on which the vehicle A is traveling based on the travel data stored in the usage history storage unit 14. Determine. Whether there is a regular road is determined for each combination of vehicle ID, day of the week, and time zone. Specifically, the service road detection unit 16 determines whether there is a road on which the same vehicle A is traveling a set number of times (20 times) or more. Then, when it is determined that there is a road on which the same vehicle A is traveling more than the set number of times (20 times) (Yes), the service road detection unit 16 determines that a service road exists, and proceeds to step S205. To do. On the other hand, if it is determined that there is no road on which the same vehicle A is traveling more than the set number of times (20 times) (No), the service road detection unit 16 determines that there is no service road and performs this calculation. The process ends.

  In the present embodiment, the regular road detection unit 16 is configured to terminate the arithmetic processing when the determination in step S204 is “No”, but other configurations may be employed. For example, the regular road detection unit 16 may be configured to shift to step S206 described later when the determination in step S204 is “No”. By doing so, even when there is no regular road among the roads on which the vehicle A is traveling, step S210 described later can be performed, and the resolution instruction table can be updated in step S210.

  In step S205, the probe data resolution control unit 17 detects a regular road from the roads on which the vehicle A is traveling based on the travel data stored in the usage history storage unit 14. The regular road is detected for each vehicle ID, day of the week, and time zone. Subsequently, the probe data resolution control unit 17 uses the service road designation information group for specifying the detected service road (including vehicle ID, path ID, start point position, end point position, inclusion point sequence, day of the week, and time zone). Is generated. Subsequently, the probe data resolution control unit 17 generates a compressed recording table including the generated regular road designation information group and stores it in the probe data resolution control unit 17. As a result, the probe data resolution control unit 17 updates the accumulated compressed recording table.

  Subsequently, the process proceeds to step S206, and the probe data resolution control unit 17 determines whether or not a statistical singular value exists in the plurality of setting sections based on the current traffic flow and the past traffic flow calculated in step S203. Determine whether. As the statistical singular value, for example, there is a setting section in which the degree of deviation between the past traffic flow (past average vehicle speed) and the current traffic flow (current average vehicle speed) is equal to or greater than the third set value (10 km / h). . Whether or not a statistical singular value exists is determined for each combination of a set section and a time zone. Specifically, the probe data resolution control unit 17 determines that the degree of dissociation between the past traffic flow (past average vehicle speed) and the current traffic flow (current average vehicle speed) is greater than or equal to the third set value (10 km / h). It is determined whether or not a certain setting section exists. Then, the probe data resolution control unit 17 sets the setting section in which the dissociation degree between the past traffic flow (past average vehicle speed) and the current traffic flow (current average vehicle speed) is equal to or greater than the third set value (10 km / h). Is determined (Yes), it is determined that a statistical singular value exists in the plurality of setting sections, and the process proceeds to step S207. On the other hand, the probe data resolution control unit 17 has a setting section in which the degree of dissociation between the past traffic flow (past average vehicle speed) and the current traffic flow (current average vehicle speed) is greater than or equal to the third set value (10 km / h). Is determined not to exist (No), it is determined that there is no statistical singular value among the plurality of setting sections, and this calculation process is terminated.

In step S207, the probe data resolution control unit 17 acquires the comprehensive contract partner total communication amount recording table from the communication load monitoring unit 18 via the communication path.
Subsequently, the process proceeds to step S208, and the probe data resolution control unit 17 determines whether the contract communication remaining amount in the communication amount designation information group in the comprehensive contract destination total communication amount recording table acquired in step S207 is sufficient. Determine whether or not. Specifically, the probe data resolution control unit 17 determines whether the contract communication remaining amount is less than a fourth set value (for example, 1/4 of the contract communication amount). When the probe data resolution control unit 17 determines that the contract communication remaining amount is equal to or greater than the fourth set value (1/4 of the contract communication amount) (No), the contract communication remaining amount is sufficient. Determination is made, and the process proceeds to step S209. On the other hand, if the probe data resolution control unit 17 determines that the contract communication remaining amount is less than the fourth set value (1/4 of the contract communication amount) (Yes), the contract communication remaining amount is insufficient. And the process proceeds to step S210.

  In this embodiment, the probe data resolution control unit 17 determines that the contract communication remaining amount is insufficient when the contract communication remaining amount is less than the fourth set value (1/4 of the contract communication amount). Although an example is shown, other configurations may be employed. For example, it may be configured to determine whether or not the contract communication remaining amount is sufficient based on the total communication amount and the remaining number of days in the current contract period. The total communication amount in the current contract period includes, for example, the total communication amount from the start of the current contract period to the present, that is, the total communication amount from the beginning of the month to the present. The remaining days include, for example, the number of days until the end of the current contract period, that is, the number of days from the present to the end of the month. Specifically, the probe data resolution control unit 17 divides the total communication amount in the communication amount designation information group in the comprehensive contract destination total communication amount recording table acquired in step S207 by the elapsed days, and the division result is obtained. It is assumed that the predicted communication amount per day (hereinafter also referred to as today's predicted communication amount). The elapsed days include, for example, the number of days from the start of the current contract period to the present, that is, the number of days from the beginning of the month to the present. Note that today's predicted traffic volume may be calculated based on, for example, the current trend of increasing total traffic volume and the total traffic volume of the same period in the past (for example, the same month as the current month). Subsequently, the probe data resolution control unit 17 divides the contract communication remaining amount in the communication amount designation information group in the comprehensive contract destination total communication amount recording table acquired in step S207 by the remaining days, and the division result is 1 The allowable remaining communication amount per day (hereinafter also referred to as today's allowable communication amount). Subsequently, the probe data resolution control unit 17 determines whether or not the calculated today's expected communication volume is larger than the today's allowable outgoing communication volume. Then, when the probe data resolution control unit 17 determines that the today's expected communication amount is greater than or equal to the today's allowable communication amount, it determines that the contract communication remaining amount is insufficient. On the other hand, when the probe data resolution control unit 17 determines that the calculated today's expected communication volume is less than the today's allowable outgoing communication volume, it determines that the contract communication remaining amount is sufficient.

FIG. 13 is a diagram for explaining a resolution setting result.
In step S209, as shown in FIG. 13, the probe data resolution control unit 17 generates a resolution specifying information group (including Min, Max, resolution, and time zone) in which the resolution of all setting sections is high. . Subsequently, the probe data resolution control unit 17 generates a resolution instruction table including the generated resolution specifying information group and stores it in the probe data resolution control unit 17. Thereby, the probe data resolution control unit 17 updates (initializes) the stored resolution instruction table when the contract communication remaining amount is less than the fourth set value.

FIG. 14 is a diagram for explaining a resolution setting result.
In step S210, the probe data resolution control unit 17 detects a statistical singular value based on the current traffic flow and the past traffic flow calculated in step S203. Subsequently, as shown in FIG. 14, the probe data resolution control unit 17 sets the resolution specific information group (Min, Max) that makes the resolution of the detected statistical singular value (setting section) high and the resolution of other setting sections low. , Including resolution and time zone). Subsequently, the probe data resolution control unit 17 generates a resolution instruction table including the generated resolution specifying information group and stores it in the probe data resolution control unit 17. As a result, the probe data resolution control unit 17 updates the stored resolution instruction table when the contract communication remaining amount is equal to or greater than the fourth set value.

Next, the comprehensive contract destination total communication amount record table update process executed by the communication load monitoring unit 18 will be described. The communication load monitoring unit 18 executes a comprehensive contract partner total communication amount record table update process every time a predetermined set time (for example, 10 msec.) Elapses.
FIG. 15 is a flowchart showing the comprehensive contract partner total communication amount record table update process.
As shown in FIG. 15, in step S <b> 301, the communication load monitoring unit 18 determines whether information is transmitted / received (communication) between the in-vehicle device 1 and the collection server 2. Whether or not communication has been performed is determined based on the monitoring result by monitoring the use state of the communication path. If the communication load monitoring unit 18 determines that communication is performed between the in-vehicle device 1 and the collection server 2 (Yes), the communication load monitoring unit 18 proceeds to step S302. On the other hand, if the communication load monitoring unit 18 determines that communication is not being performed between the in-vehicle device 1 and the collection server 2 (No), the calculation processing ends.

In step S <b> 302, the communication load monitoring unit 18 acquires the data amount (communication amount) of information transmitted / received (communication) between the in-vehicle device 1 and the collection server 2. The amount of communication between the in-vehicle device 1 and the collection server 2 is acquired based on the monitoring result of the use state of the communication path.
Subsequently, the process proceeds to step S303, and the communication load monitoring unit 18 detects the total communication amount and the contract communication remaining amount based on the communication amount between the in-vehicle device 1 and the collection server 2 acquired in step S302. . Subsequently, the communication load monitoring unit 18 generates a total communication amount designation information group (including the total communication amount and the contract communication remaining amount) for specifying the detected total communication amount. Subsequently, the communication load monitoring unit 18 generates a comprehensive contract destination total communication amount recording table including the generated total communication amount designation information group and stores it in the communication load monitoring unit 18, and then ends the calculation process. As a result, the communication load monitoring unit 18 updates the accumulated comprehensive contract partner total communication amount recording table.

(Operation other)
Next, the operation of the travel data collection system S will be described.
First, the operation when the travel data collection system S generates and updates the comprehensive contract partner total communication amount recording table will be described.
It is assumed that any one of the in-vehicle devices 1 of the plurality of vehicles A transmits the traveling data to the collection server 2 via the communication path of the communication carrier C. Then, the communication load monitoring unit 18 determines that communication has been performed between the in-vehicle device 1 and the collection server 2 (step S301 in FIG. 15). Subsequently, the communication load monitoring unit 18 acquires a communication amount between the in-vehicle device 1 and the collection server 2, that is, a data amount (communication amount) of travel data transmitted from the in-vehicle device 1 to the collection server 2 ( Step S302 in FIG. 15). Subsequently, the communication load monitoring unit 18 detects the total communication amount and the contract communication remaining amount based on the acquired communication amount (step S303 in FIG. 15). Subsequently, the communication load monitoring unit 18 generates a total communication amount designation information group for specifying the detected total communication amount, and generates a comprehensive contract destination total communication amount recording table including the generated total communication amount designation information group. And stored in the communication load monitoring unit 18 (step S303 in FIG. 15). Thereby, the communication load monitoring unit 18 updates the comprehensive contract destination total communication amount recording table stored in the communication load monitoring unit 18.

The operation when the travel data collection system S generates and updates the compression recording table and the resolution instruction table will be described.
It is assumed that the collection server 2 acquires travel data transmitted from any of the in-vehicle devices 1 of the plurality of vehicles A. Then, the collection server 2 determines that the transmitted travel data has been acquired, and stores the acquired travel data in the usage history storage unit 14 (steps S201 and S202 in FIG. 12). Subsequently, the collection server 2 performs past data statistical processing, that is, calculates the current traffic flow (average vehicle speed) and the past traffic flow (average vehicle speed) (step S203 in FIG. 12).

  Here, it is assumed that there is a regular road on the road, that is, a road on which the same vehicle A is traveling a set number of times (20 times) or more. Then, the collection server 2 determines that a regular road exists (step S204 “Yes” in FIG. 12). Subsequently, the collection server 2 detects a regular road from the roads on which the vehicle A is traveling based on the travel data stored in the usage history storage unit 14 (step S205 in FIG. 12). The regular road is detected for each vehicle ID, day of the week, and time zone. Subsequently, the collection server 2 generates a regular road designation information group for specifying the detected regular road, creates a compressed recording table including the created regular road designation information group, and sends it to the probe data resolution control unit 17. Accumulate (step S205 in FIG. 12). Thereby, the collection server 2 updates the compressed recording table stored in the probe data resolution control unit 17.

  Here, among the plurality of setting sections, a setting in which the degree of deviation between the past traffic flow (past average vehicle speed) and the current traffic flow (current average vehicle speed) is equal to or greater than the third set value (10 km / h). Assume that there is a section (hereinafter also referred to as a unique setting section). Then, when the collection server 2 has a statistical singular value (single setting section) among a plurality of setting sections based on the past traffic flow (past average vehicle speed) and the current traffic flow (current average vehicle speed). The determination is made (step S206 “Yes” in FIG. 12). Subsequently, the collection server 2 acquires a comprehensive contract partner total communication amount recording table from the communication load monitoring unit 18 via the communication path of the communication carrier C (step S207 in FIG. 12). Further, it is assumed that the contract communication remaining amount in the acquired communication amount designation information group in the acquired comprehensive contract partner total communication amount recording table is 1/4 or more of the contract communication amount. Then, the collection server 2 determines that the contract communication remaining amount in the acquired communication amount designation information group in the acquired comprehensive contract destination total communication amount recording table is equal to or greater than the fourth setting value (1/4 of the contract communication amount). (Step S208 “No” in FIG. 12). Subsequently, the collection server 2 generates a resolution specifying information group in which the resolutions of all the setting sections are high, generates a resolution instruction table including the generated resolution specifying information group, and accumulates it in the probe data resolution control unit 17. (Step S209 in FIG. 12, FIG. 13). Thereby, the collection server 2 initializes the resolution instruction table stored in the probe data resolution control unit 17.

  Then, the collection server 2 repeatedly executes the above flow. It is assumed that the contract communication remaining amount in the communication amount designation information group in the acquired comprehensive contract partner total communication amount recording table becomes less than 1/4 of the contract communication amount while the above flow is repeatedly executed. Then, the collection server 2 determines that the contract communication remaining amount in the communication amount designation information group in the comprehensive contract destination total communication amount recording table is less than the fourth set value (1/4 of the contract communication amount) ( Step S208 of FIG. 12 “Yes”). Subsequently, the collection server 2 detects a statistical singular value (single setting section) based on the past traffic flow (past average vehicle speed) and the current traffic flow (current average vehicle speed) (step S210 in FIG. 12). . Subsequently, the collection server 2 generates a resolution specifying information group in which the resolution of the detected statistical singular value (single setting section) is high and the resolution of other setting sections is low, and the resolution including the generated resolution specifying information group An instruction table is generated and stored in the probe data resolution controller 17 (step S210 in FIG. 12, FIG. 14). As a result, the collection server 2 updates the resolution instruction table stored in the probe data resolution control unit 17.

The operation when the in-vehicle device 1 transmits travel data to the collection server 2 will be described.
It is assumed that the driver turns on the ignition switch of the host vehicle A (hereinafter also referred to as host vehicle A1). Then, the in-vehicle device 1 of the host vehicle A1 determines that the driver has started driving (step S101 “Yes” in FIG. 11). Subsequently, the in-vehicle device 1 acquires a compressed recording table from the collection server 2 via the communication path of the communication carrier C (step S102 in FIG. 11). Subsequently, the in-vehicle device 1 acquires a resolution instruction table from the collection server 2 via the communication path of the communication carrier C (step S103 in FIG. 11). Here, it is assumed that the contract communication remaining amount is ¼ or more of the contract communication amount, and the resolutions of the communication amount designation information group of the acquired resolution instruction table are all high. Then, the in-vehicle device 1 determines that a high resolution recording instruction has been given (step S104 “Yes” in FIG. 11). Subsequently, the in-vehicle device 1 sets the travel data, the vehicle ID, the current day of the week, and the current time zone for each second set time (1 [sec]) based on the information output by the vehicle control unit 11 and the navigation device 12. Is acquired and stored (step S105 in FIG. 11). Then, the in-vehicle device 1 transmits the accumulated travel data, vehicle ID, current day of the week, and current time zone to the collection server 2 (step S105 in FIG. 11). Thereby, the vehicle-mounted apparatus 1 can collect more detailed travel data in the collection server 2 at the beginning of the contract period.

  And the vehicle equipment 1 repeats the said flow. Assume that the contract communication remaining amount becomes less than 1/4 of the contract communication amount while the flow is repeatedly executed, and the resolution of the communication amount designation information group in the resolution instruction table includes both high and low. Also, it is assumed that the resolution of the resolution instruction information group corresponding to the set section including the current position and current time of the host vehicle A1 and the time zone in the resolution instruction information group of the resolution instruction table is low (low resolution instruction area). . Then, the in-vehicle device 1 determines that the contract communication remaining amount is less than ¼ of the contract communication amount, and determines that there is no high resolution recording instruction (“No” in step S104 in FIG. 11). Subsequently, the in-vehicle device 1 sets the travel data, the vehicle ID, the current day of the week, and the current time zone for each first set time (30 [sec]) based on the information output by the vehicle control unit 11 and the navigation device 12. Acquire and accumulate. As described above, the travel data, the vehicle ID, the current day of the week, and the current time zone acquisition interval are adjusted based on the contract communication remaining amount. Specifically, when it is determined that the contract communication remaining amount is less than 1/4 of the contract communication amount, it is transmitted compared to when it is determined that the contract communication remaining amount is 1/4 or more of the contract communication amount. Increase the acquisition interval of running data to be used. Further, it is assumed that the road on which the own vehicle A1 is traveling is not a regular road, that is, the road on which the own vehicle A1 is traveling more than 20 times. Then, the in-vehicle device 1 has the same vehicle ID as the vehicle ID of the host vehicle A1 among the plurality of regular road designation information groups in the acquired compression record table based on the accumulated travel data, It is determined that the deviation of the time series data of the current position of the vehicle A1 from the passing line segment is less than the set value, the day of the week is the same as the current day of the week, and there is no regular movement specific information group including the current time of the day Then, it is determined that the vehicle is traveling on a road other than the regular road (step S106 “No” in FIG. 11). Subsequently, the in-vehicle device 1 transmits the accumulated travel data (travel data acquired every first set time (30 [sec])), the vehicle ID, the current day of the week, and the current time zone to the collection server 2 ( Step S108 in FIG. 11). As a result, the in-vehicle device 1 can collect coarser travel data in the collection server 2 when the contract communication remaining amount becomes less than 1/4 of the contract communication amount.

As described above, the in-vehicle device 1 of the present embodiment is configured to transmit the travel data to be transmitted based on the contract communication remaining amount that is the difference between the total communication amount and the set upper limit value (contract communication amount) of the total communication amount in the contract period. Adjust the acquisition interval. Thereby, the vehicle-mounted apparatus 1 of this embodiment can suppress that total communication amount exceeds a setting upper limit (contracted communication amount), collecting required traveling data in detail.
Further, when it is determined that the contract communication remaining amount is less than ¼ of the contract communication amount, the in-vehicle device 1 of the present embodiment determines that the contract communication remaining amount is ¼ or more of the contract communication amount. Compared to the case, the acquisition interval of the traveling data to be transmitted is lengthened. Therefore, as shown in FIG. 10, the in-vehicle device 1 of the present embodiment can suppress the usage amount of the contract communication remaining amount in the second half of the contract period. Thereby, the vehicle-mounted apparatus 1 of this embodiment can collect driving | running | working data in detail in the first half of a contract period.

  On the other hand, it is assumed that the road on which the vehicle A1 is traveling is a regular road, that is, the road on which the vehicle A1 is traveling 20 times or more. Then, the in-vehicle device 1 has the same vehicle ID as the vehicle ID of the host vehicle A1 among the plurality of regular road designation information groups in the acquired compression record table based on the accumulated travel data, The deviation degree of the time-series data of the current position of the vehicle A1 from the passing line segment is less than the set value, the day of the week is the same as the current day of the week, and the regular movement specific information group including the current time is present. It determines and it determines with driving | running | working on a regular road (step S106 "Yes" of FIG. 11). Subsequently, the in-vehicle device 1 acquires a path ID that identifies a service road on which the host vehicle A is traveling based on the acquired compression record table and the information output by the navigation device 12, and the acquired path ID, The vehicle ID, the current day of the week, and the current time zone are transmitted to the collection server 2 (step S107 in FIG. 11). Thereby, when the in-vehicle device 1 is traveling on the regular road, the increase in the communication amount can be further suppressed.

  As described above, the in-vehicle device 1 according to the present embodiment determines whether or not the host vehicle A1 is traveling on a regular road that is a road whose number of travels of the host vehicle A1 is equal to or greater than the set number (20 times) based on the acquired travel data. Determine whether. Subsequently, the in-vehicle device 1 of the present embodiment transmits traveling data to the collection server 2 when it is determined that the host vehicle A1 is not traveling on the regular road. On the other hand, when it is determined that the host vehicle A1 is traveling on the regular road, the in-vehicle device 1 of the present embodiment indicates that the host vehicle A1 is traveling on the regular road and is more data than the travel data. Alternative data (path ID) with a small amount is transmitted to the collection server 2. Therefore, the in-vehicle device 1 of the present embodiment transmits traveling data to the collection server 2 when the host vehicle A1 is traveling on a road other than the regular road. On the other hand, the in-vehicle device 1 of the present embodiment indicates that the own vehicle A1 is traveling on the regular road when the own vehicle A1 is traveling on the regular road, and the data amount is smaller than the travel data. Alternative data (path ID) that is data is transmitted to the collection server 2. Thereby, the vehicle-mounted apparatus 1 of this embodiment can suppress the increase in communication amount, collecting required travel data in detail.

  Furthermore, when it is determined that the host vehicle A1 is traveling in the low resolution instruction area, the in-vehicle device 1 of the present embodiment determines whether or not the host vehicle A1 is traveling on a regular road. Therefore, the in-vehicle device 1 of the present embodiment transmits alternative data (path ID) to the collection server 2 when the host vehicle A1 is traveling on a regular road in the low resolution instruction area. Therefore, the in-vehicle device 1 of the present embodiment, for example, more appropriately increases the amount of communication between the in-vehicle device 1 and the collection server 2 by setting an area where detailed travel data is not necessary as a low resolution instruction area. Can be suppressed.

  On the other hand, it is assumed that among the resolution instruction information groups of the resolution instruction table, the resolution instruction information group corresponding to the set section and time zone including the current position and current time of the host vehicle A1 is high. Then, the in-vehicle device 1 determines that a high resolution recording instruction has been given (step S104 “Yes” in FIG. 11). Subsequently, the in-vehicle device 1 sets the travel data, the vehicle ID, the current day of the week, and the current time zone for each second set time (1 [sec]) based on the information output by the vehicle control unit 11 and the navigation device 12. (Step S105 in FIG. 11). Then, the in-vehicle device 1 transmits the accumulated travel data, vehicle ID, current day of the week, and current time zone to the collection server 2 (step S105 in FIG. 11). Thereby, regardless of whether the in-vehicle device 1 is traveling on a regular road, the necessary traveling data can be collected in detail by the collection server 2.

  As described above, the in-vehicle device 1 of the present embodiment does not determine whether or not the own vehicle A1 is traveling on the regular road when it is determined that the own vehicle A1 is traveling in the high-resolution instruction area. The traveling data is transmitted to the collection server 2. Therefore, the in-vehicle device 1 of the present embodiment always transmits the traveling data to the collection server 2 when the host vehicle A is traveling in the high resolution instruction area. Therefore, the in-vehicle device 1 according to the present embodiment can collect the necessary travel data in detail by the collection server 2 by setting, for example, an area where detailed travel data is required as a high resolution instruction area.

  In the present embodiment, the vehicle speed detection unit 5, the direction detection unit 6, the altitude detection unit 7, and the position detection unit 10 of FIG. 1 constitute a data acquisition unit. Similarly, the travel data storage unit 13 in FIG. 1 and steps S107 and S108 in FIG. 9 constitute a data transmission unit. 1 and the step S104 in FIG. 11 constitute a communication remaining amount detection unit. Further, the travel data storage unit 13 in FIG. 1 and step S106 in FIG. 9 constitute a regular road travel determination unit.

(Effect of this embodiment)
This embodiment has the following effects.
(1) The in-vehicle device 1 acquires travel data that is data representing the travel state of the host vehicle A1. Subsequently, the in-vehicle device 1 transmits the acquired travel data to the collection server 2. At that time, the in-vehicle device 1 detects the contract communication remaining amount that is the difference between the total communication amount and the set upper limit value (contract communication amount) of the total communication amount in the contract period. And the vehicle-mounted apparatus 1 adjusts the acquisition interval of the driving | running | working data to transmit based on the detected communication residual amount.
According to such a configuration, the acquisition interval of the travel data to be transmitted is adjusted based on the contract communication remaining amount that is the difference between the total communication amount and the set upper limit value (contract communication amount) of the total communication amount in the contract period. . Thereby, it is possible to suppress the total communication amount from exceeding the set upper limit value (contract communication amount) while collecting necessary data in detail.

(2) When the in-vehicle device 1 determines that the contract communication remaining amount is the set value (less than 1/4 of the contract communication amount), the contract communication remaining amount is the set value (1/4 of the contract communication amount). The acquisition interval of the travel data to be transmitted is lengthened compared to the case where it is determined that the above is true.
According to such a configuration, as shown in FIG. 10, the usage amount of the contract communication remaining amount can be suppressed in the latter half of the contract period. Therefore, the travel data can be collected in detail in the first half of the contract period.

(3) The in-vehicle device 1 determines whether or not the host vehicle A1 is traveling on a regular road that is a road whose number of travels of the host vehicle A1 is equal to or greater than the set number of times (20 times) based on the travel data. Subsequently, when the in-vehicle device 1 determines that the host vehicle A1 is not traveling on the regular road, the traveling data is transmitted to the collection server 2. On the other hand, if the in-vehicle device 1 determines that the host vehicle A1 is traveling on the regular road, it represents that the host vehicle A1 is traveling on the regular road and the data amount is smaller than the travel data. Data (path ID) is transmitted to the collection server 2.

  According to such a configuration, the traveling data is transmitted to the collection server 2 when the host vehicle A1 is traveling on a road other than the regular road. On the other hand, when the host vehicle A1 is traveling on the regular road, the substitute data (path ID) that indicates that the host vehicle A1 is traveling on the regular road and whose data amount is smaller than the travel data. Is transmitted to the collection server 2. Thereby, it is possible to suppress an increase in communication volume while collecting necessary travel data in detail.

(Modification 1)
FIG. 16 is a diagram for explaining a resolution setting result.
In this embodiment, when the in-vehicle device 1 determines that the contract communication remaining amount is the set value (less than 1/4 of the contract communication amount), the contract communication remaining amount is the set value (contract communication amount). Although an example in which the acquisition interval of the travel data to be transmitted is lengthened as compared with the case where it is determined that it is 1/4) or more is shown, other configurations may be employed. For example, when the in-vehicle device 1 determines that the contract communication remaining amount is equal to or greater than the set value (1/4 of the contract communication amount), the contract communication remaining amount is the set value (less than 1/4 of the contract communication amount). It is good also as a structure which lengthens the acquisition interval of the driving | running | working data to transmit compared with the case where it determines with it. Specifically, in step S105, the travel data storage unit 13 determines that there is no high resolution recording instruction for the travel data, the vehicle ID, the current day of the week, and the current time zone (step S104 “ No ", longer than step S106). In step S209, as shown in FIG. 16, the probe data resolution control unit 17 generates a resolution specifying information group for reducing the resolution of all setting sections.

(Effect of Modification 1)
This modification has the following effects in addition to the effects (1) and (3) of the above embodiment.
FIG. 17 is a diagram for explaining the effect of the modification.
(1) When the in-vehicle device 1 determines that the contract communication remaining amount is equal to or greater than the set value (1/4 of the contract communication amount), the contract communication remaining amount is the set value (1/4 of the contract communication amount). Compared to the case where it is determined that it is less than, the acquisition interval of the travel data to be transmitted is lengthened.
According to such a configuration, as shown in FIG. 17, the contract communication remaining amount can be left in the second half of the contract period. Therefore, the travel data can be collected in detail in the second half of the contract period.

(Modification 2)
In addition, for example, when the in-vehicle device 1 determines that the contract communication remaining amount is less than the set value (1/4 of the contract communication amount), it determines that the host vehicle A is traveling on a high traffic volume road. The configuration may be such that the acquisition interval of the travel data to be transmitted is made longer than when it is determined that the host vehicle A is not traveling on the high traffic volume road. As a high traffic route, for example, there is a road whose traffic is equal to or higher than a set value. Specifically, in the step S210, the probe data resolution control unit 17 detects the traffic volume of each set section based on the current traffic flow calculated in the step S203. The traffic volume includes, for example, the number of vehicles A traveling per unit time in the set section. Subsequently, the probe data resolution control unit 17 determines whether or not the detected traffic volume is a set value (for example, 50 vehicles / min) or more for each set section. Then, the probe data resolution control unit 17 generates a resolution specific information group in which the resolution of the setting section determined that the traffic volume is less than the set value (50 vehicles / min) is high and the resolution of the other setting sections is low. To do. Subsequently, the probe data resolution control unit 17 generates a resolution instruction table including the generated resolution specifying information group and stores it in the probe data resolution control unit 17.

  In step S104, the travel data storage unit 13 determines whether there is a high-resolution recording instruction based on the acquired resolution instruction table, information output from the navigation device 12 (the current position of the host vehicle A), and the current time. Determine whether. Specifically, the travel data storage unit 13 determines that the corresponding setting section, that is, the setting section specified by Min and Max, is the current position of the host vehicle A among the plurality of resolution instruction information groups in the resolution instruction table. , The resolution is high, and there is a resolution information group whose time zone includes the current time, it is determined that there is a high resolution recording instruction. As a result, the travel data storage unit 13 determines whether or not the contract communication remaining amount is less than 1/4 of the contract traffic and the own vehicle A is traveling on a high traffic volume road. As a high traffic route, there is, for example, a road whose traffic is equal to or higher than a set value (50 vehicles / min). When the traveling data storage unit 13 determines that there is a high-resolution recording instruction (Yes), the contract communication remaining amount is a set value (1/4 or more of the contract communication amount), or the own vehicle A has a high traffic amount. It determines with driving | running | working other than a road, and transfers to step S105. On the other hand, when the traveling data storage unit 13 determines that there is no high resolution recording instruction (No), the contract communication remaining amount is equal to or greater than the set value (1/4 of the contract communication traffic), and the vehicle A Is determined to be traveling, and the process proceeds to step S106.

As a result, the in-vehicle device 1 of the present modification has a contract communication remaining amount that is less than the set value (1/4 of the contract communication traffic volume) and determines that the host vehicle A is traveling on a high traffic volume road. Compared with the case where it is determined that the contract communication remaining amount is equal to or greater than the set value (1/4 of the contract traffic) or that the own vehicle A is not traveling on the high traffic route, the travel data acquisition interval to be transmitted Lengthen.
In the present modification, the travel data storage unit 13 in FIG. 1 and step S104 in FIG. 11 constitute a high traffic road travel determination unit.

This modification has the following effects in addition to the effects (1) to (3) of the above embodiment.
(1) When the in-vehicle device 1 is traveling on a high traffic volume road where the remaining amount of contract communication is less than a set value (1/4 of the contracted traffic volume) and the traffic volume is greater than or equal to the set value, Compared to the case where it is determined that the contract communication remaining amount is equal to or greater than the set value (1/4 of the contract traffic) or that the own vehicle A is not traveling on the high traffic route. Increase the travel data acquisition interval.
According to such a configuration, it is possible to collect travel data on a road with a small amount of traffic in detail.

(Modification 3)
FIG. 18 is a diagram illustrating a comprehensive contract partner total communication amount recording table.
In the present embodiment, the data center B and the communication carrier C set a predetermined communication amount (contracted communication amount) between all the in-vehicle devices 1 of the in-vehicle devices 1 of the plurality of vehicles A and the collection server 2. Although an example of performing a contract that can be used every month has been described, another contract may be performed. For example, the data center B and the communication carrier C can use a predetermined communication amount (contracted communication amount) between the in-vehicle device 1 and the collection server 2 for each in-vehicle device 1 of the plurality of vehicles A every month. You may make it make a communication contract. In this case, as the comprehensive contractor total communication volume recording table, for example, as shown in FIG. 18, a table including a plurality of total communication volume designation information groups is used. Each of the plurality of total communication amount designation information groups is associated with one of the in-vehicle devices 1 of the plurality of vehicles A and the contract period (target month). Each of the total communication amount designation information group includes various types of information for setting data to be transmitted from the in-vehicle devices 1 of the plurality of vehicles A to the collection server 2. Specifically, the total communication amount designation information group includes, for example, a contract terminal ID, a target month, a total communication amount, and a contract communication remaining amount. Examples of the contract terminal ID include an alphanumeric string for uniquely identifying the corresponding in-vehicle device 1. In addition, as the target month, for example, there is a combination of the year and month (for example, 2011-01) for uniquely identifying the corresponding month.

In step S <b> 302, the communication load monitoring unit 18 acquires the data amount (communication amount) of information transmitted / received (communication) between the in-vehicle device 1 and the collection server 2. Subsequently, the communication load monitoring unit 18 acquires the contract terminal ID of the vehicle A of the in-vehicle device 1 with which communication has been performed.
Further, in step S303, the communication load monitoring unit 18 determines the contract terminal ID, the total communication amount, and the contract based on the communication amount and the contract terminal ID between the in-vehicle device 1 and the collection server 2 acquired in step S302. Detect remaining communication capacity. Subsequently, the communication load monitoring unit 18 determines the detected contract terminal ID, the total communication amount, and the total communication amount designation information group (contract terminal ID, target month, total communication amount, and contract communication remaining amount). (Including quantity). Subsequently, the communication load monitoring unit 18 generates a comprehensive contract destination total communication amount recording table including the generated total communication amount designation information group and stores it in the communication load monitoring unit 18, and then ends the calculation process.

In step 208, the probe data resolution control unit 17 transmits the travel data received in step S201 in the communication amount designation information group in the comprehensive contract partner total communication amount recording table acquired in step S207. It is determined whether or not the contract communication remaining amount of the communication amount designation information group including the contract terminal ID of the original in-vehicle device 1 and the current month as the target month is sufficient. Specifically, the probe data resolution control unit 17 determines whether or not the contract communication remaining amount of the traffic designation information group is less than a fourth set value (for example, 1/4 of the contract traffic). If the probe data resolution control unit 17 determines that the contract communication remaining amount of the communication amount designation information group is less than the fourth set value (1/4 of the contract communication amount) (Yes), the communication is performed. It is determined that the contract communication remaining amount in the quantity designation information group is insufficient, and the process proceeds to step 210. On the other hand, if the probe data resolution control unit 17 determines that the contract communication remaining amount of the traffic designation information group is equal to or greater than the fourth set value (1/4 of the contract traffic) (No), the probe data resolution control unit 17 It is determined that the contract communication remaining amount in the quantity designation information group is sufficient, and the process proceeds to step S209.
Thereby, the vehicle-mounted apparatus 1 of this modification can update the resolution instruction table for each vehicle A.

5 Vehicle speed detection part (data acquisition part)
6 Direction detection unit (data acquisition unit)
7 Altitude detection unit (data acquisition unit)
10 Position detection unit (data acquisition unit)
13 Travel data storage unit (data transmission unit, communication remaining amount detection unit, regular road travel determination unit, high traffic road travel determination unit)
Step S104 (communication remaining amount detection part, high traffic route traveling judgment part)
Step S106 (ordinary road travel determination unit)
Steps S107 and S108 (data transmission unit)

Claims (5)

A data acquisition unit that acquires travel data that is data representing the traveling state of the host vehicle;
A data transmission unit that transmits the travel data acquired by the data acquisition unit to a collection server;
Calculated by subtracting the total communication amount calculated by totaling communication with the collection server from the start of the setting period to the present for each setting period from the preset upper limit value recorded . A communication remaining amount detecting unit for detecting the remaining communication amount,
The data acquisition unit adjusts an acquisition interval of travel data to be transmitted based on a communication remaining amount detected by the communication remaining amount detection unit until the set period ends . The data acquisition unit, when said communication remaining amount detecting unit determines that the communication remaining amount detected is less than the set value, the communication remaining amount by the communication remaining amount detecting section detects is a set value or more The travel data acquisition device according to claim 1, wherein an acquisition interval of the travel data to be transmitted is lengthened as compared with the case of determination.   When the data acquisition unit determines that the remaining communication amount detected by the remaining communication amount detection unit is greater than or equal to a set value, the remaining communication amount detected by the remaining communication amount detection unit is less than the set value. The travel data acquisition device according to claim 1, wherein an acquisition interval of the travel data to be transmitted is lengthened as compared with the case of determination. A service road determination unit for determining whether or not the vehicle is traveling on a service road that is a road whose number of travels of the host vehicle is greater than or equal to a set number of times based on the travel data acquired by the data acquisition unit;
The data transmission unit transmits the travel data acquired by the data acquisition unit to the collection server when the regular road travel determination unit determines that the host vehicle is not traveling on the regular road, and the regular road When the travel determination unit determines that the host vehicle is traveling on the regular road, it represents that the host vehicle is traveling on the regular road instead of the travel data acquired by the data acquisition unit; The travel data acquisition device according to any one of claims 1 to 3, wherein substitute data that is data having a data amount smaller than the travel data is transmitted to the collection server. A high-traffic road traveling determination unit that determines whether or not the vehicle is traveling on a high-traffic road that is a road with a traffic volume equal to or higher than a set value based on the traveling data acquired by the data acquisition unit;
The data acquisition unit determines that the remaining communication amount detected by the remaining communication amount detection unit is less than a set value, and the high traffic road traveling determination unit determines that the host vehicle is traveling on the high traffic road. In this case, the remaining communication amount detected by the remaining communication amount detection unit is greater than or equal to a set value, or the high traffic route traveling determination unit determines that the host vehicle is not traveling on the high traffic route. 5. The travel data acquisition apparatus according to claim 1, wherein the travel data acquisition interval to be transmitted is longer than that of the transmission data.

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