JP6729848B2 - Traffic information providing system, traffic information providing device, traffic information providing program, and in-vehicle device - Google Patents

Description

The present invention relates to a traffic information providing system, a traffic information providing device, and a traffic information providing program. Specifically, the present invention relates to a method of providing highly real-time traffic information such as signal information, route signal information, and sensor information to an in-vehicle device mounted on a vehicle.

BACKGROUND ART There is known a technique in which a roadside device installed on a road provides high-real-time information about a switching timing of traffic signals and an obstacle measured by a sensor installed on the roadside. (For example, see Patent Document 1 and Non-Patent Document 1)
In this case, the vehicle-mounted device that has acquired the information from the roadside device contributes to the reduction of traffic accidents by providing the information to the passenger through the display installed in the vehicle.
Further, there is also known a technology for providing traffic information by connecting an in-vehicle device and a traffic information providing center with a public line. (For example, see Non-Patent Document 2)

JP-A-8-2285

UTMS Association, "Safe Driving Support System (DSSS)", [online], [Search on December 4, 2015], Internet <URL: http://www.utms.or.jp/japanese/system /dsss.html> Takeshi Imai, 2 others, "Internavi Floating Car System and Congestion Prediction", Journal of International Traffic Safety Association, June 2006, Vol. 31, No. 1, p. 39-45

According to Patent Document 1, a wireless reception device mounted on a vehicle receives operation information of a traffic signal from a wireless transmission device installed on the roadside and uses it for safe driving assistance. In other words, however, a vehicle that does not have such a wireless reception device cannot receive the benefit of safe driving support using traffic signal operation information.
Further, Non-Patent Document 2 describes a system in which a car navigation system and an information center are connected by a mobile phone to provide traffic congestion information. However, this system does not provide highly real-time traffic information as provided by the system described in Patent Document 1.

The present invention has been made in view of the above problems, and even in a vehicle that does not have a means for directly communicating with a wireless communication device installed on the roadside, real-time information such as signal information provided from the wireless communication device is provided. An object of the present invention is to provide a traffic information providing system, a traffic information providing apparatus, and a traffic information providing program that can obtain highly accurate traffic information.

(1) To achieve the above object, a traffic information providing system according to an embodiment of the present invention includes a roadside wireless communication unit installed on a roadside, a first vehicle-mounted device mounted on a first vehicle, and a first vehicle-mounted device. A traffic information providing system comprising: a second vehicle-mounted device mounted on two vehicles; and a traffic information providing unit capable of communicating with the first vehicle-mounted device and the second vehicle-mounted device, wherein the roadside wireless communication unit includes: Providing first traffic information to the first vehicle-mounted device, the first vehicle-mounted device creates second traffic information including the first traffic information received from the roadside wireless communication unit, and the traffic information providing unit. The traffic information providing unit creates third traffic information based on the second traffic information received from the first vehicle-mounted device and provides the third traffic information to the second vehicle-mounted device.

(11) A traffic information providing apparatus according to an embodiment of the present invention includes a first vehicle-mounted device that creates second traffic information based on first traffic information provided by a roadside wireless communication unit installed on a roadside, The second traffic information is received, the third traffic information is created based on the second traffic information, and the third traffic information is provided to the second vehicle-mounted device.

(12) A traffic information providing program according to an embodiment of the present invention includes a first vehicle-mounted device that creates second traffic information based on first traffic information provided by a roadside wireless communication unit installed on a roadside, The receiving unit that receives the second traffic information and the communication unit that creates the third traffic information based on the second traffic information and provide the third traffic information to the second vehicle-mounted device are caused to function as the computer.

According to the present invention, even in a vehicle that does not have a means for directly communicating with a wireless communication device installed on the roadside, it is possible to obtain traffic information that is provided from the wireless communication device and has high real-time properties, such as signal information.

It is a figure which shows the structure of the traffic information provision system which concerns on embodiment of this invention. 3 is a time chart of the traffic information providing system according to the embodiment of the present invention. It is a figure which shows the functional structure of a roadside wireless communication apparatus. It is a figure which shows the structure of the vehicle which mounts a 1st vehicle equipment. It is a figure which shows the structure of a traffic information provision center. It is a figure which shows the structure of the vehicle which mounts a 2nd vehicle equipment. It is a time chart which shows an example at the time of a traffic information providing device transmitting transmission directions information to the 2nd vehicle equipment. It is a flowchart which shows the process which a traffic information provision apparatus produces the 3rd traffic information. It is a flowchart which shows the process in which a traffic information provision apparatus provides 3rd traffic information. It is a figure which shows an example of the 2nd traffic information preserve|saved at the roadside radio|wireless communication apparatus. It is a figure which shows an example of the 3rd traffic information which a traffic information provision apparatus provides. It is a figure which shows the modification of the 3rd traffic information which a traffic information provision apparatus provides.

<Outline of Embodiment of the Present Invention>
First, embodiments of the present invention will be listed and described.

(1) To achieve the above object, a traffic information providing system according to an embodiment of the present invention includes a roadside wireless communication unit installed on a roadside, a first vehicle-mounted device mounted on a first vehicle, and a first vehicle-mounted device. A traffic information providing system comprising: a second vehicle-mounted device mounted on two vehicles; and a traffic information providing unit capable of communicating with the first vehicle-mounted device and the second vehicle-mounted device, wherein the roadside wireless communication unit includes: Providing first traffic information to the first vehicle-mounted device, the first vehicle-mounted device creates second traffic information including the first traffic information received from the roadside wireless communication unit, and the traffic information providing unit. The traffic information providing unit creates third traffic information based on the second traffic information received from the first vehicle-mounted device and provides the third traffic information to the second vehicle-mounted device.

According to this configuration, the first vehicle-mounted device mounted on the first vehicle creates the second traffic information based on the first traffic information provided by the roadside wireless communication unit and transmits the second traffic information to the traffic information providing unit. The information providing unit creates the third traffic information based on the second traffic information and provides the third traffic information to the second vehicle-mounted device mounted on the second vehicle.
Therefore, even the second vehicle that cannot directly receive the first traffic information from the roadside wireless communication unit can obtain the third traffic information created based on the first traffic information from the traffic information providing unit, and thus the roadside wireless communication unit. It is possible to acquire traffic information with high real-time property such as signal information provided from the communication unit.

(2) In the traffic information providing system according to another embodiment of the present invention, the roadside wireless communication unit provides the traffic information to the first vehicle-mounted device by the first vehicle-mounted device. To the traffic information providing unit based on the transmission time point information notified from the roadside wireless communication unit. It is desirable to send.
In this way, if the timing at which the first vehicle-mounted device transmits the second traffic information to the traffic information providing unit is controlled based on the transmission time point information from the roadside wireless communication unit, for example, within the communication area of the roadside wireless communication device. It is possible to prevent a plurality of existing first vehicles from transmitting redundant information, and it is possible to prevent an increase in communication traffic and an increase in processing load on the traffic information providing unit.

(3) In the traffic information providing system according to an embodiment of the present invention, the first vehicle-mounted device transmits, to the traffic information providing unit, communicable information related to the roadside wireless communication unit with which the first vehicle-mounted device can communicate. It is desirable that the traffic information providing unit transmits, to the first vehicle-mounted device that has transmitted the communicable information, transmission instruction information related to a transmission instruction of the second traffic information to itself.
In this way, the traffic information providing unit controls the transmission of the second traffic information from the first vehicle-mounted device by using the transmission instruction information, so that, for example, the plurality of first vehicle-mounted devices existing in the communication area of the roadside wireless communication device. Can be prevented from transmitting redundant information, and an increase in communication traffic and an increase in processing load on the traffic information providing unit can be prevented.

(4) In the traffic information providing system according to another embodiment of the present invention, the roadside wireless communication unit transmits to the traffic information providing unit the communicable vehicle information related to the first vehicle-mounted device with which the roadside wireless communication unit can communicate. It is preferable that the traffic information providing unit transmits, to the first vehicle-mounted device included in the communicable vehicle information, transmission instruction information related to an instruction to transmit the second traffic information to itself.
In this way, the traffic information providing unit controls the transmission of the second traffic information from the first vehicle-mounted device by using the transmission instruction information, so that, for example, the plurality of first vehicle-mounted devices existing in the communication area of the roadside wireless communication device. Can be prevented from transmitting redundant information, and an increase in communication traffic and an increase in processing load on the traffic information providing unit can be prevented.

(5) In the traffic information providing system according to an embodiment of the present invention, the transmission instruction information includes, in the transmission instruction information, transmission time point information relating to a timing at which the first vehicle-mounted device transmits the second traffic information to the traffic information providing unit. Is preferably included.
In this way, if the first vehicle-mounted device transmits based on the timing designated by the traffic information providing unit, for example, the plurality of first vehicle-mounted devices existing within the communication area of the roadside wireless communication device transmit redundant information. This can be prevented, and an increase in communication traffic and an increase in processing load on the traffic information providing unit can be prevented.

(6) In the traffic information providing system according to one embodiment of the present invention, the second traffic information includes a first traffic information indicating a first time when the first vehicle-mounted device receives the first traffic information from the roadside wireless communication unit. Time information is included, and the traffic information providing unit preferably determines the second traffic information used when creating the third traffic information based on the first time information.
With this configuration, for example, the traffic information providing unit can always create the third traffic information based on the latest second traffic information.

(7) In the traffic information providing system according to another embodiment of the present invention, it is preferable that the traffic information providing unit creates the third traffic information with a coarser resolution than the second traffic information.
By doing so, even if the third traffic information received by the second vehicle-mounted device includes an error, if the third traffic information is created with a resolution larger than the error, the second vehicle-mounted device receives the error. Not only can the traffic information with high real-time property be used on the assumption that the third traffic information includes an error, but also the storage area for storing the third traffic information and the communication capacity for transmitting/receiving can be reduced. be able to.

(8) In the traffic information providing system according to an embodiment of the present invention, the traffic information providing unit is based on the first time information related to the second traffic information used when creating the third traffic information. It is desirable that the second time information is created by using the second time information, and the third traffic information including the second time information is created.
In this way, the second vehicle-mounted device can grasp how much the received third traffic information is past information, and it can be utilized for safe driving support.

(9) Furthermore, it is desirable that the second vehicle-mounted device provides the passengers of the second vehicle with information related to the second time information.
In this way, the passenger of the second vehicle equipped with the second vehicle-mounted device can grasp how much past the received third traffic information is, which can be useful for his/her own driving behavior. it can.

(10) In the traffic information providing system according to an embodiment of the present invention, the traffic information providing unit determines the first in-vehicle device based on at least one of the following (a) to (c). It is desirable to grant the privilege of.
(A) Data amount of the second traffic information received by the traffic information providing unit (b) Data amount of the second traffic information determined by the traffic information providing unit based on the first time information (c) The The number of the second vehicle-mounted devices that the traffic information providing unit receives the same data. In this way, the passenger of the first vehicle equipped with the first vehicle-mounted device sends the second traffic information to the traffic information providing unit. We can expect the willingness to actively cooperate in providing.

(11) A traffic information providing apparatus according to an embodiment of the present invention includes a first vehicle-mounted device that creates second traffic information based on first traffic information provided by a roadside wireless communication unit installed on a roadside, The second traffic information is received, the third traffic information is created based on the second traffic information, and the third traffic information is provided to the second vehicle-mounted device.
By doing so, even the second vehicle-mounted device that cannot directly receive the first traffic information from the roadside wireless communication unit can obtain the third traffic information created based on the first traffic information from the traffic information providing unit. Therefore, traffic information with high real-time property, such as signal information, provided from the roadside wireless communication unit can be acquired.

(12) A traffic information providing program according to an embodiment of the present invention includes a first vehicle-mounted device that creates second traffic information based on first traffic information provided by a roadside wireless communication unit installed on a roadside, The receiving unit that receives the second traffic information and the communication unit that creates the third traffic information based on the second traffic information and provide the third traffic information to the second vehicle-mounted device are caused to function as the computer.
By doing so, even the second vehicle-mounted device that cannot directly receive the first traffic information from the roadside wireless communication unit can obtain the third traffic information created based on the first traffic information from the traffic information providing unit. Therefore, traffic information with high real-time property, such as signal information, provided from the roadside wireless communication unit can be acquired.

(13) The in-vehicle device according to the embodiment of the present invention is the second in-vehicle device included in the traffic information providing system. As a result, the second vehicle-mounted device can acquire the third traffic information created based on the first traffic information from the traffic information providing unit, and can utilize it for safe driving support.

<Details of the embodiment of the present invention>
Hereinafter, details of an embodiment of the present invention will be described with reference to the drawings. Note that at least a part of the embodiments described below may be arbitrarily combined.

[1. Overall configuration of information provision system]
FIG. 1 is a diagram showing a configuration of a traffic information providing system 1 according to an embodiment of the present invention.
In the present embodiment, the “vehicle” refers to an automobile (including a motorcycle), a bicycle with a motor, a light vehicle, a trolleybus, and the like. “In-vehicle device” refers to a computer device having a communication function or the like, which is permanently or temporarily installed in a vehicle.

As shown in FIG. 1, a traffic information providing system 1 according to the present embodiment includes a traffic control center 2, a roadside wireless communication device 3, a traffic signal controller 4, a roadside sensor 5, a vehicle 6, and traffic information provision. A center 8 and the like are provided. The traffic signal controller 4 is based on the signal control parameters (cycle length, split, and offset) received from the traffic control center 2, etc. Power is supplied to the signal light device 4A so that lights up, turns off, or blinks. The roadside wireless communication device 3 collects various kinds of traffic information from the traffic control center 2, the traffic signal controller 4, and the roadside sensor 5, creates first traffic information, and provides it to the vehicle 6. The first traffic information includes, for example, one or more of route signal information, signal information, and sensor information described later. However, the information is not limited to these.

The vehicle 6 is a vehicle targeted by the traffic information providing center 8 for providing traffic information. The first vehicle 63 of the vehicles 6 is equipped with a first vehicle-mounted device 73 (see FIG. 4) capable of communicating with both the roadside wireless communication device 3 and the traffic information providing center 8. The second vehicle 68 of the vehicles 6 is a vehicle equipped with a second vehicle-mounted device 78 (see FIG. 6) capable of communicating only with the traffic information providing center 8.

The roadside wireless communication device 3 provides the first vehicle 63 with the first traffic information based on the collected traffic information. The first vehicle 63 uses the first vehicle-mounted device 73 to receive the first traffic information provided from the roadside wireless communication device 3 and provide it to the driver to utilize it for safe driving assistance. The second traffic information is created from the traffic information and transmitted to the traffic information providing center 8 via the Internet 9. The traffic information providing center 8 creates third traffic information based on the received second traffic information, and delivers it to the second vehicle-mounted device 78 of the second vehicle 68 via the Internet 9 again. The communication means between the traffic information providing center 8 and the first vehicle-mounted device 73 and between the traffic information provision center 8 and the second vehicle-mounted device 78 are not limited to the Internet.

FIG. 2 is a time chart of the traffic information providing system 1 according to the embodiment of the present invention.
The roadside wireless communication device 3 acquires route signal information from the traffic control center 2, signal information from the traffic signal controller 4, and sensor information from the roadside sensor 5. Further, the roadside wireless communication device 3 adds its own ID to these pieces of information, edits the information into a predetermined format, and at a predetermined cycle (for example, 100 ms cycle), with respect to the first vehicle 63 including the first vehicle-mounted device 73. And deliver it as the first traffic information.

The first vehicle-mounted device 73 of the first vehicle 63 that has received the first traffic information adds the time at which the first traffic information was received to the first traffic information to create the second traffic information. The passenger ID and the accumulated probe information are added and transmitted to the traffic information providing device 81.

The traffic information providing device 81 creates second time information based on the first time information. Further, the traffic information providing device 81 creates third traffic information based on the second time information and the second traffic information, and provides the third traffic information to the second vehicle 68 equipped with the second vehicle-mounted device 78.
Therefore, even in the second vehicle 68 that cannot directly receive the first traffic information from the roadside wireless communication device 3, the third traffic information with high real time created based on the first traffic information can be acquired from the traffic information providing device 81. You can

[2. Functions of Traffic Control Center)
The traffic control center 2 of the present embodiment can execute traffic signal control for changing the signal control parameter according to the traffic situation for the traffic signal controller 4 of each intersection belonging to the controlled area. Specifically, system control is performed to adjust a series of traffic signal controllers 4 included in the system section based on the amount of traffic flowing into the intersection, wide area control in which this system control is extended to a road network, and the like. Further, the traffic control center 2 creates signal control parameters which are these control results and route signal information relating to a plurality of traffic signal controllers 4 installed on the same route. The route signal information includes distance information to each intersection on the route in the traveling direction of the vehicle, a light color switching timing of a traffic signal installed at each intersection, and the like.

Further, the traffic control center 2 is connected to a traffic signal controller 4 and a roadside wireless communication device 3 installed at each intersection in its own area through a dedicated bidirectional communication line such as a telephone line. .. The traffic control center 2 transmits the signal control parameter to the traffic signal controller 4, and also transmits the route signal information to the roadside wireless communication device 3.

[3. Functions of traffic signal controller and roadside sensor)
The traffic signal controller 4 generates a lighting color switching timing (step seconds) according to the signal control parameter received from the traffic control center 2. Further, the traffic signal controller 4 supplies power to the signal light device 4A so that the signal light device 4A such as the blue round light, the yellow round light, the red round light, and the right turn arrow light is turned on, turned off, or blinks according to the generated switching timing. Supply. The traffic signal controller 4 also transmits the switching timing of the light color to the roadside wireless communication device 3 as signal information. In addition, while the traffic signal controller 4 is executing a right turn sensation or other sensation control, it provides signal information with a width (maximum seconds and minimum seconds). (Seconds) signal information is provided.

The roadside sensor 5 is installed near the intersection controlled by the traffic signal controller 4. When the measurement target of the roadside sensor 5 is a vehicle, the roadside sensor 5 measures, for example, the number of vehicles existing in the measurement target area, the traveling lane/position/speed/vehicle type of each vehicle, and the roadside wireless communication as sensor information. Send to device 3. When the measurement target of the roadside sensor 5 is a pedestrian, the roadside sensor 5 measures, for example, the presence/absence of pedestrians on a pedestrian crossing, the number of pedestrians, the position/speed/moving direction of each pedestrian, etc. Send to device 3.

[4. Configuration and function of roadside wireless communication device]
FIG. 3 is a diagram showing a functional configuration of the roadside wireless communication device 3.
The roadside wireless communication device 3 constitutes a roadside wireless communication unit in the traffic information providing system 1, and includes a traffic control center communication unit 31, a traffic signal controller communication unit 32, a roadside sensor communication unit 33, and a roadside sensor communication unit 33. The first in-vehicle device communication section 34 is provided. The traffic control center communication unit 31 is connected to the traffic control center 2 via a dedicated bidirectional communication line such as a telephone line. The traffic signal controller communication unit 32 is connected to the traffic signal controller 4 via a serial line or the like, and receives the signal information generated by the traffic signal controller 4. The roadside sensor communication unit 33 receives the sensor information about the vehicle and the pedestrian measured by the roadside sensor 5.

The control unit 36 saves the received signal information, route signal information, and sensor information in the storage unit 35, adds the ID of the roadside wireless communication device 3 to these, and edits them in a predetermined format to obtain the first traffic information. create. Furthermore, the first in-vehicle device communication unit 34 sends the first traffic information to the first vehicle 63 including the first in-vehicle device 73 that travels within the communication area 30 of the first vehicle 63 at a predetermined cycle (for example, 100 ms cycle). To broadcast.

[5. Configuration and Function of Vehicle with First In-Vehicle Unit]
FIG. 4 is a diagram showing a configuration of a vehicle in which the first vehicle-mounted device 73 is mounted. As shown in FIG. 4, the first vehicle 63 includes a first vehicle-mounted device 73.
The first vehicle-mounted device 73 uses a GPS receiver or various sensors to detect the position of the first vehicle 63, accumulates the position and traveling speed as probe information, and guides the route to the destination. Including equipment. The navigation device may be a dedicated device incorporated in the first vehicle 63, or may be a mobile terminal (a mobile phone, a smartphone, a tablet terminal, a laptop computer, etc.) temporarily installed in the first vehicle 63. It may be.

The first vehicle-mounted device 73 communicates with the roadside wireless communication device 3 by the roadside wireless device communication unit 731, and acquires the first traffic information such as the ID of the roadside wireless communication device 3, signal information, route signal information, and sensor information. , To the storage unit 733 via the control unit 732. The first vehicle onboard machine 73 also acquires the time when the first traffic information was acquired from the GPS receiver and stores it in the storage unit 733 as the first time information. The control unit 732 adds the first time information to the first traffic information to create the second traffic information, and displays the second traffic information on the display unit 734 to utilize for safe driving support. Further, the control unit 732 adds the member ID of the passenger of the first vehicle 63 and the accumulated probe information, and transmits it to the traffic information providing device 81 from the providing device communication unit 735 through the Internet 9.

[6. Configuration and function of traffic information center]
FIG. 5 is a diagram showing a configuration of the traffic information providing center 8. The traffic information providing center 8 includes a traffic information providing device 81. The traffic information providing device 81 constitutes a traffic information providing unit in the traffic information providing system 1, and includes a first in-vehicle device communication device 810, a second in-vehicle device communication device 811, a computer device 812, and a road network. It includes a recorded map DB 81A, a member DB 81B that records information relating to members who are the target of traffic information provision, and a traffic information DB 81C that records second traffic information and third traffic information. The traffic information DB 81C also stores traffic information such as traffic jam information, travel time information, and regulation information that has low real-time characteristics. The computer device 812 includes a control device 8121 and a storage device 8122. Various computer programs related to providing traffic information are stored in the storage device 8122, and the control device 8121 reads them from the storage device 8122 and executes them.

The second traffic information transmitted from the first vehicle-mounted device 73 mounted on the first vehicle 63 is input to the computer device 812 via the first vehicle-mounted device communication device 810 and recorded in the traffic information DB 81C. Next, the computer device 812 creates the second time information by copying the first time information included in the second traffic information. Further, the computer device 812 creates third traffic information based on the second time information and the second traffic information and records it in the traffic information DB 81C.
Then, the computer device 812 provides the third traffic information from the second in-vehicle device communication device 811 to the second vehicle 68 equipped with the second in-vehicle device 78 via the Internet 9.

[7. Configuration and Function of Vehicle with Second In-Vehicle Unit]
FIG. 6 is a diagram showing the configuration of the second vehicle 68 equipped with the second vehicle-mounted device 78.
The second vehicle-mounted device 78 acquires various traffic information including the third traffic information distributed from the traffic information providing device 81 by the communication device for providing device 781 and stores the traffic information in the storage unit 783 through the control unit 782. The information is provided to the passenger via the display unit 784 and is utilized for safe driving support.

[8. Second traffic information transmission timing control]
The roadside wireless communication device 3 broadcasts the first traffic information to the first vehicle-mounted devices 73 of all the first vehicles 63 traveling in the communication area 30 of its own, and further the first vehicle-mounted devices of all the first vehicles 63. When 73 transmits the second traffic information to the traffic information providing device 81, the redundant second traffic information is transmitted.
As a result, the communication traffic increases, and the processing load on the second on-vehicle communication device 811 and the computer device 812 in the traffic information providing device 81 also increases.

FIG. 7 is a time chart showing an example when the traffic information providing device 81 transmits the transmission instruction information to the second vehicle-mounted device 78. Note that, in FIG. 7, the second traffic information is represented by a solid line, and the other information is represented by a dotted line. Also, the provision of the first traffic information from the roadside wireless communication device 3 to the first vehicle 63 and the member ID and probe information transmitted together with the second traffic information are not shown.

First, the first vehicle-mounted device 73 of the first first vehicle 631 enters the communication area 30 by receiving the first traffic information broadcast from the roadside wireless communication device 3 at a constant cycle (for example, 100 ms cycle). Recognize what you have done. Next, the first vehicle onboard machine 73 of the first first vehicle 631 indicates that the passenger of the first first vehicle 631 (the first vehicle onboard machine 73 mounted on the first first vehicle 631) is included in the second traffic information. The member ID of the owner) and the probe information are added and transmitted to the traffic information providing device 81.
Further, the traffic information providing device 81 creates the transmission instruction information X1 using the ID of the roadside wireless communication device 3 received together with the second traffic information. For example, when the first vehicle 63 that is communicating with the roadside wireless communication device 3 in the communication area 30 is only the first first vehicle 631, the transmission instruction information X1 includes every positive second (second of the clock is At the moment of switching), an instruction to send the latest second traffic information to the traffic information providing device 81 is included. The traffic information providing device 81 transmits the transmission instruction information X1 to the first vehicle-mounted device 73 of the first first vehicle 631.

The first vehicle-mounted device 73 of the first first vehicle 631 that has received the transmission instruction information X1 receives the latest second traffic information at every second (the moment when the second of the clock is switched) according to the instruction. Send to 81. Thereby, the traffic information providing apparatus 81 can acquire the second traffic information every one second.

Next, when the second first vehicle 632 enters the communication area 30, as in the case of the first first vehicle 631, the first vehicle-mounted device 73 of the second first vehicle 632 determines that the second traffic information Is added to the member ID and probe information of the passenger of the second first vehicle 632 (the owner of the first vehicle-mounted device 73 mounted on the second first vehicle 632) and transmitted to the traffic information providing device 81. To do. Accordingly, the traffic information providing device 81 recognizes that the number of the first vehicles 63 communicating with the roadside wireless communication device 3 in the communication area 30 has increased to two. Further, the traffic information providing device 81 sends the transmission instruction information X2 including an instruction to send the latest second traffic information to the traffic information providing device 81 in even seconds and the second second information in odd seconds. Transmission instruction information X3 including an instruction to transmit the traffic information to the traffic information providing device 81 is created. The traffic information providing device 81 transmits the transmission instruction information X2 to the first vehicle-mounted device 73 of the first first vehicle 631 and the transmission instruction information X3 to the first vehicle-mounted device 73 of the second first vehicle 632. ..

The first vehicle-mounted device 73 of the first first vehicle 631 that has received the transmission instruction information X2, in accordance with the instruction, indicates the passenger of the first first vehicle 631 to the latest second traffic information at the even second of the even second. The member ID of the (owner of the first vehicle-mounted device 73 mounted on the first first vehicle 631) and the probe information are added and transmitted to the traffic information providing device 81. In addition, the first vehicle-mounted device 73 of the second first vehicle 632 that has received the transmission instruction information X3, according to the instruction, in the latest second traffic information of the second first vehicle 632 at the odd second of the second. The member ID of the passenger (the owner of the first vehicle-mounted device 73 mounted on the second first vehicle 632) and the probe information are added and transmitted to the traffic information providing device 81. The first vehicle-mounted device 73 of the first first vehicle 631 and the first vehicle-mounted device 73 of the second first vehicle 632 alternately transmit the latest second traffic information to the traffic information providing device 81, thereby As a result, the information providing device 81 can obtain the second traffic information every second without redundancy.

Further, when the first vehicle-mounted device 73 of the first first vehicle 631 receives the first traffic information transmitted from the roadside wireless communication device 3, the first vehicle-mounted device 73 recognizes that it has exited the communication area 30 and outputs the information. The information is transmitted to the traffic information providing device 81 together with the member ID and probe information of the passenger of the first first vehicle 631 (owner of the first vehicle-mounted device 73 mounted on the first first vehicle 631). The traffic information providing device 81 recognizes that the number of the first vehicles 63 communicating with the roadside wireless communication device 3 in the communication area 30 has decreased to one, and creates the transmission instruction information X4. Similar to the transmission instruction information X1, the transmission instruction information X4 includes an instruction to transmit the latest second traffic information to the traffic information providing device 81 every second. The traffic information providing device 81 transmits the transmission instruction information X4 to the first vehicle onboard machine 73 of the second first vehicle 632.
The first vehicle-mounted device 73 of the second first vehicle 632 transmits the latest second traffic information to the traffic information providing device 81 every second according to the transmission instruction information X4. Thereby, the traffic information providing apparatus 81 can acquire the second traffic information every one second.

In this way, the traffic information providing device 81 controls the second traffic information transmission from the first vehicle-mounted device 73 using the transmission timing included in the transmission instruction information, so that, for example, within the communication area 30 of the roadside wireless communication device 3. It is possible to prevent the plurality of first vehicle-mounted devices 73 existing in the above from transmitting redundant information, and it is possible to prevent an increase in communication traffic and an increase in processing load of the traffic information providing device 81.

[9. Creation and provision of third traffic information]
FIG. 8 is a flowchart showing a process in which the traffic information providing device 81 creates the third traffic information.
First, the traffic information providing device 81 receives the passenger (first first vehicle) of the first first vehicle 631 from the first in-vehicle device 73 of the first vehicle 63 via the first in-vehicle device communication device 810. The member ID (owner of the first vehicle-mounted device 73 mounted on the 631) and the second traffic information are received and transmitted to the control device 8121 included in the computer device 812. (Step S101). Next, the control device 8121 searches the received data amount of the member stored in the member DB using the member ID, and adds the data amount of the third traffic information received this time (step S102).

Subsequently, the control device 8121 acquires the ID of the route wireless communication device 3 included in the second traffic information (step S103). Further, it is confirmed whether or not the third traffic information regarding the roadside wireless communication device 3 corresponding to the acquired ID is stored in the traffic information DB 81C. If it is saved (Y in step S104), the first time information is compared with the first time information of the received second traffic information. If the first time information of the received second traffic information is older (Y in step S105), the process ends without doing anything.
In other cases (N in step S104 or N in step S105), the control device 8121 adds the second time information to the received second traffic information to create the third traffic information. Then, the probe information and the third traffic information are stored in the traffic information DB 81C (step S106).
By doing so, for example, the traffic information providing device 81 can always create the third traffic information based on the latest second traffic information. In addition, the second vehicle-mounted device 78 can grasp how much the received third traffic information is past information, and can be utilized for the safe driving support.

FIG. 9 is a flowchart showing a process in which the traffic information providing device provides the third traffic information.
First, the control device 8121 included in the computer device 812 of the traffic information providing device 81 searches for information of the registered roadside wireless communication device 3 (step S201), and the third traffic information of the corresponding roadside wireless communication device 3 is searched. Is stored in the traffic information DB 81C (Y in step S202), and the second time information is sufficiently new, that is, within a predetermined time (for example, 10 seconds) from the current time (Y in step S203), the map DB 81A. To obtain the position of the corresponding roadside wireless communication device 3 (step S204). If the third traffic information stored in the traffic information DB 81C is old (N in step S203), the control device 8121 deletes the third traffic information from the traffic information DB 81C (step 209).

Subsequently, the control device 8121 extracts the vehicle 6 traveling around the position of the corresponding roadside wireless communication device 3 from the probe information stored in the traffic information DB 81C (step S205). At this time, the first vehicle 63 equipped with the first vehicle-mounted device 73 is also provided with the third traffic information.
However, it is preferable that the control device 8121 exclude the first vehicle 63 that is in communication with the roadside wireless communication device from the extracted vehicles 6 (step S206). This is because the first vehicle 63 that is communicating with the roadside wireless communication device can directly obtain the first traffic information from the roadside wireless communication device 3 without receiving the third traffic information provided from the traffic information providing device 81. Because.

The control device 8121 provides the finally remaining vehicle 6 with the third traffic information (step S207). At this time, the control device 8121, via the first in-vehicle device communication device 810 when the provision destination is the first in-vehicle device 73, and the second in-vehicle device communication device when the provision destination is the second in-vehicle device 78. The third traffic information is provided via 811.
When the control device 8121 provides the third traffic information, traffic congestion information, travel time information, regulation information, etc. stored in the traffic information DB 81C may be added and provided.
The control device 8121 repeats these processes until the provision of the third traffic information regarding all the roadside wireless communication devices 3 is completed (step S208).

[10. Utilization of third traffic information to support safe driving]
The first vehicle-mounted device 73 and the second vehicle-mounted device 78 that have received the third traffic information are provided to the user (passenger) by displaying the third traffic information on the display unit 734 or the display unit 784, Use it for safe driving support.
Further, the first vehicle-mounted device 73 and the second vehicle-mounted device 78 provide the second time information to the user (passenger), so that the user (passenger) is notified that the third traffic information is past information. It is desirable to call attention. Note that instead of providing the second time information as it is, information related to the difference from the current time (for example, 10 seconds before) may be provided.

Further, the first vehicle-mounted device 73 and the second vehicle-mounted device 78 may edit and provide the third traffic information using the difference between the current time and the second time information. For example, when the green time of the signal information included in the received third traffic information is 30 seconds and the time difference between the second time information and the current time is 5 seconds, 25 seconds (=30 seconds-5 seconds) is set. provide. When the third traffic information includes sensor information that another vehicle is traveling 100 m from the stop line toward the stop line at 36 km/h (=10 m/sec), 50 m (=100 m- 10 m/sec×5 sec) is provided.
The first vehicle-mounted device 73 and the second vehicle-mounted device 78 may be provided by voice or alarm sound instead of being displayed on the display unit, or may be provided by using a combination thereof.
As a result, the user (passenger) can grasp how much the received third traffic information is past information, and can use it for his/her own driving behavior.
In this way, the first vehicle onboard machine 73 and the second vehicle onboard machine 78 can acquire the third traffic information created based on the first traffic information from the traffic information providing unit, and can utilize it for safe driving support.

[11. Benefit service for members]
According to the traffic information providing system according to the embodiment of the present invention, in order to stably provide the traffic information with high real-time property to the second vehicle 68 that cannot directly communicate with the roadside wireless communication device 3, It is indispensable to have the first vehicle 63 equipped with the in-vehicle device 73 actively cooperate. For that purpose, the incentive for the member who is the user (passenger) of the first vehicle onboard machine 73 who has transmitted the second traffic information to the traffic information providing device 81 is effective.
Specifically, according to the amount of received data added in step S102 of FIG. 8, reduction or exemption of membership fee for receiving the service provided by the traffic information providing device 81, points in the point service operated by the traffic information providing center 8 Addition, change of member rank, etc.

On the other hand, as shown in FIG. 7, when there is the first vehicle 63 in communication with the roadside wireless communication device 3 in the communication area 30, the first vehicle-mounted device is transmitted by the transmission instruction information from the traffic information providing device 81. The cycle in which the aircraft 73 transmits the second traffic information may be set longer than usual. In the example of FIG. 7, the cycle in which the second traffic information is transmitted from the time when the second first vehicle 632 enters the communication area 30 until the time when the first first vehicle 631 leaves the communication area 30 is the original cycle. Limited to 1 to 2 seconds. Therefore, the amount of data received by the traffic information providing device 81 used for a privilege is also small. Therefore, a certain proportion (for example, 50%) of the amount of data that can be transmitted when the second first vehicle 632 is not present (corresponding to the amount of data received from the first vehicle-mounted device 73 of the second first vehicle 632 during that period). ) May be used as the bonus data amount for the user (passenger) of the first vehicle-mounted device 73 of the first first vehicle 631.

In addition, it can be said that the smaller the number of the first vehicles 63 existing in the same communication area 30, the higher the value of the information. For example, in FIG. 7, from the time the first first vehicle 631 enters the communication area 30 until the time when the second first vehicle 632 enters the same communication area 30, the traffic information providing device 81 may find the first time. The first vehicle-mounted device 73 of the first first vehicle 631 is the only data source regarding the second traffic information. Therefore, when adding the received data amount, it may be divided by the number of the first vehicles 63 that are in communication with the same roadside wireless communication device 3. In the case of the example in FIG. 7, the use of the respective first vehicle-mounted devices 73 from the time when the second first vehicle 632 enters the communication area 30 until the time when the first first vehicle 631 leaves the communication area 30. Half of the amount of data actually received will be added to the member who is the passenger (passenger).
In this way, the passenger of the first vehicle 63 in which the first vehicle-mounted device 73 is mounted can be expected to be willing to actively cooperate in providing the second traffic information to the traffic information providing unit.

<Modification 1 of the embodiment of the present invention>
From the time when the roadside wireless communication device 3 provides the first traffic information until the time when the traffic information providing device 81 creates and provides the third traffic information, the calculation time in each device and the transmission time between each device, etc. is necessary. As a result, when the first vehicle-mounted device 73 or the second vehicle-mounted device 78 receives the third traffic information, the acquisition delay time of the information is less than that when the first vehicle-mounted device 73 directly receives the first traffic information. Therefore, the reliability of the information may become low. For example, during the delay time, the traffic signal controller 4 may end sensitive control such as right turn sensitive control and the signal information may be confirmed, or a vehicle or a pedestrian measured by the roadside sensor 5 may move. Conceivable.

Therefore, when the traffic information providing device 81 creates the third traffic information (step S106 in FIG. 8), the resolution of the information may be roughened. For example, it is conceivable to round off signal information or route signal information in 0.1 second units to 1 second units, or to round down sensor information (measured vehicle or pedestrian position) in 10 cm units to 1 m units. ..
As a result, even if the third traffic information received by the second vehicle-mounted device 78 includes an error, if the third traffic information is created with a resolution larger than the error, the second vehicle-mounted device 78 receives the error. Not only can the traffic information with high real-time property be used on the assumption that the third traffic information includes an error, but also the storage area of the traffic information DB 81C when storing the third traffic information and the communication capacity when transmitting and receiving. Can be reduced.

<Modification 2 of the embodiment of the present invention>
Instead of the traffic information providing device 81 creating the transmission instruction information, the roadside wireless communication device 3 may create the transmission time point information. Specifically, in the same way as the traffic information providing device 81 creates the transmission instruction information, the roadside wireless communication device 3 determines the traffic information providing unit according to the number of the first vehicles 63 communicating with itself. The transmission timing is calculated and is transmitted to the first vehicle 63 together with the first traffic information as the transmission time point information.
Thus, if the timing at which the first vehicle-mounted device 73 transmits the second traffic information to the traffic information providing device 81 is controlled based on the transmission time point information from the roadside wireless communication device 3, for example, It is possible to prevent the plurality of first vehicles 63 existing in the communication area 30 from transmitting redundant information, and it is possible to prevent an increase in communication traffic and an increase in the processing load of the traffic information providing device 81.
<Modification 3 of the embodiment of the present invention>

Alternatively, when the roadside wireless communication device 3 is connected to the traffic information providing device 81 and the Internet 9, the roadside wireless communication device 3 and the traffic information providing device 81 may cooperate to create the transmission instruction information. Specifically, the roadside wireless communication device 3 transfers the member IDs of all passengers of the first vehicle 63 (owner of the first vehicle-mounted device 73 mounted on the first vehicle 63) communicating with the roadside wireless communication device 3 to the traffic. The information is transmitted to the information providing device 81. The traffic information providing device 81 creates transmission instruction information according to the number of the first vehicles 63 communicating with the roadside wireless communication device 3 and the like, and transmits the transmission instruction information to the first vehicles 63.
In this way, the traffic information providing device 81 controls the second traffic information transmission from the first vehicle-mounted device 73 by using the transmission instruction information, so that, for example, a plurality of roadside wireless communication devices 3 existing in the communication area 30 exist. It is possible to prevent the first vehicle-mounted device 73 from transmitting redundant information, and it is possible to prevent an increase in communication traffic and an increase in processing load on the traffic information providing device 81.

<Modification 4 of the embodiment of the present invention>
In FIG. 7, the transmission instruction information means the timing at which the first vehicle 63 transmits the second traffic information to the traffic information providing device 81, but the traffic information to be transmitted may be designated. For example, when the first first vehicle 631 and the second first vehicle 632 are simultaneously communicating with the roadside wireless communication device 3, the first first vehicle 631 outputs the route signal information and the signal information every second. The transmission instruction information is created so that the second first vehicle 632 transmits the sensor information to the traffic information providing device 81 every second.

<Modification 5 of the embodiment of the present invention>
FIG. 8 shows an example in which the latest second traffic information is always adopted as the third traffic information.

FIG. 10 is a diagram showing an example of the second traffic information stored in the traffic information providing device 81.
The signal information in which the first time information corresponds to 12:00:00 means that blue is 2 seconds, yellow is 3 seconds, and red is 50 seconds. Similarly, the sensor information means that the vehicle to be measured is 100 m from the stop line and is traveling at 10 m/s.

Regarding the signal information corresponding to the first time information of 12:00:01, the time has advanced by 1 second, and the blue has decreased by 1 second to 1 second, but the yellow and red seconds have not changed. .. According to the sensor information, the vehicle to be measured advances 10 m per second, moves to a position 90 m from the stop line, and the traveling speed is kept at 10 m per second.

Furthermore, regarding the signal information corresponding to the first time information of 12:00:02, as the time advanced by 1 second, blue decreased by 1 second to 0 second, but the number of seconds of yellow and red changed. Not not. However, at this time, the sensor information is missing (corresponding to “−” in FIG. 10).

Furthermore, the signal information corresponding to the first time information of 12:00:03 shows that the time has advanced by 1 second, so that it changes from blue to yellow and yellow decreases by 1 second to 2 seconds. Has not changed. Further, the sensor information means that the measurement target vehicle is at a position 70 m from the stop line and is traveling at a speed of 10 m per second.

FIG. 11 is a diagram showing an example of the third traffic information provided by the traffic information providing device 81.
For the signal information, the same value as the second traffic information is set at any time. The same value as the second traffic information is also set for the sensor information at the times 12:00:00, 12:00:01, and 12:00:03.
However, since the sensor information at 12:00:02 is missing, the latest sensor information is used as it is. That is, the same value as the sensor information of 12:00:01 is set in the portion where the sensor information of 12:00:02 should be set originally. In such a case, it is desirable to add a flag (corresponding to * in FIG. 11) in order to clarify that the position and velocity are older than usual.

However, as for the sensor information included in the second traffic information, if past data is stored for a certain period (for example, 5 seconds), measurement omission of the measurement target object occurs for some reason, and the sensor information is lost. In addition, the result estimated using the stored past information may be used as the third traffic information.
FIG. 12 is a diagram showing a modification of the third traffic information provided by the traffic information providing device 81.
For example, as shown in this modification, using the saved past sensor information (in this case, the sensor information of 12:00:00 and 12:00:01), the position is 80 m and the speed is 10 m. Estimated to be present and set. At this time, it is desirable to add a flag (corresponding to * in FIG. 12) in order to clarify that the position and speed are estimated values.

The embodiments disclosed this time are illustrative in all points and not restrictive. The scope of rights of the present invention is not limited to the above-described embodiments, but includes all modifications within the scope equivalent to the configurations described in the claims.

1 Traffic Information Providing System 2 Traffic Control Center 3 Roadside Wireless Communication Device 30 Communication Area 31 Traffic Control Center Communication Unit 32 Traffic Signal Controller Communication Unit 33 Roadside Sensor Communication Unit 34 First Vehicle Communication Unit 35 Storage Unit 36 Control unit 4 Traffic signal controller 4A Signal lamp 5 Roadside sensor 6 Vehicle 63 First vehicle 631 First first vehicle 632 Second first vehicle 68 Second vehicle 7 In-vehicle device 73 First in-vehicle device 731 Roadside wireless device Communication unit 732 Control unit 733 Storage unit 734 Display unit 735 Pair providing device communication unit 78 Second in-vehicle device 781 Pair providing device communication unit 782 Control unit 783 Storage unit 784 Display unit 8 Traffic information providing center 81 Traffic information providing device 810 vs. 1 in-vehicle device communication device 811 vs. second in-vehicle device communication device 812 computer device 8121 control device 8122 storage device 81A map DB
81B Member DB
81C Traffic information DB
9 Internet

Claims (12)

A roadside wireless communication unit installed on the roadside, a first vehicle-mounted device mounted on a first vehicle, a second vehicle-mounted device mounted on a second vehicle, and communication with the first vehicle-mounted device and the second vehicle-mounted device. A traffic information providing system including a possible traffic information providing unit,
The roadside wireless communication unit provides the first vehicle-mounted device with first traffic information,
The first vehicle-mounted device creates second traffic information including the first traffic information received from the roadside wireless communication unit, and transmits the second traffic information to the traffic information providing unit,
The traffic information providing unit, the third to generate the traffic information based on the second traffic information received from the first vehicle-mounted apparatus, and provided to the second vehicle-mounted apparatus,
The roadside wireless communication unit transmits the communicable vehicle information related to the first vehicle-mounted device that the roadside wireless communication unit can communicate to the traffic information providing unit,
The traffic information providing unit further transmits, to the first vehicle-mounted device included in the communicable vehicle information, transmission instruction information related to an instruction to transmit the second traffic information to itself.
Traffic information provision system. The roadside wireless communication unit notifies the first vehicle-mounted device of transmission time point information relating to the timing when the first vehicle-mounted device transmits the second traffic information to the traffic information providing unit,
The first vehicle-mounted device transmits the second traffic information to the traffic information providing unit based on the transmission time point information notified from the roadside wireless communication unit,
The traffic information providing system according to claim 1. The first vehicle-mounted device transmits, to the traffic information providing unit, communicable information related to the roadside wireless communication unit with which the first vehicle-mounted device can communicate.
The traffic information providing unit to the first vehicle-mounted apparatus that transmitted the communication possible information, and transmits the transmission instruction information,
The traffic information providing system according to claim 1. The transmission instruction information includes transmission time point information relating to the timing at which the first vehicle-mounted device transmits the second traffic information to the traffic information providing unit,
The traffic information providing system according to any one of claims 1 to 3 . The second traffic information includes first time information relating to a time point when the first vehicle-mounted device receives the first traffic information from the roadside wireless communication unit,
The traffic information providing unit determines the second traffic information used when creating the third traffic information based on the first time information,
The traffic information providing system according to any one of claims 1 to 4 . The traffic information providing unit includes at least one of time information coarser than a time resolution of time information indicated by the second traffic information and distance information coarser than a distance resolution of distance information indicated by the second traffic information . Create traffic information,
The traffic information providing system according to any one of claims 1 to 5 . The traffic information providing unit creates second time information based on the first time information related to the second traffic information used when creating the third traffic information, and includes the second time information. Create third traffic information,
The traffic information providing system according to claim 5 . The second vehicle-mounted device provides the passenger of the second vehicle with the second time information or a difference between the current time and the second time information .
The traffic information providing system according to claim 7 . The traffic information providing unit grants a predetermined privilege to the first vehicle-mounted device based on at least one of the following (a) to (c):
The traffic information providing system according to claim 5 or claim 7 .
(A) Data amount of the second traffic information received by the traffic information providing unit (b) Data amount of the second traffic information determined by the traffic information providing unit based on the first time information (c) The Number of the first in- vehicle units that the traffic information providing unit received the same data A traffic information providing device for providing traffic information,
Receiving the second traffic information from the first vehicle-mounted device that creates the second traffic information based on the first traffic information provided from the roadside wireless communication unit installed on the roadside,
Creating a third traffic information based on the second traffic information to provide the third traffic information to the second vehicle-mounted apparatus,
From the roadside wireless communication unit, receives the communicable vehicle information related to the first vehicle-mounted device that can communicate with itself,
To the first vehicle-mounted device included in the communicable vehicle information, transmission instruction information related to a transmission instruction of the second traffic information to itself is transmitted.
Traffic information providing device. A traffic information providing program for providing traffic information to vehicles,
A first receiving unit that receives the second traffic information from a first vehicle-mounted device that creates second traffic information based on the first traffic information provided from the roadside wireless communication unit installed on the roadside;
A communication unit that creates third traffic information based on the second traffic information and provides the third traffic information to the second vehicle-mounted device ;
The roadside from the wireless communication unit, a traffic information providing program for causing a computer to function as the second receiving unit which receives communication possible vehicle information relating to themselves can communicate the first vehicle unit,
The communication unit further transmits, to the first vehicle-mounted device included in the communicable vehicle information, transmission instruction information related to a transmission instruction of the second traffic information to the computer,
Traffic information provision program . A second vehicle-mounted device included in the traffic information providing system according to any one of claims 1 to 9 .
In-vehicle device.

Images