JP6362891B2 - Roadside wireless communication device, central device, communication method, computer program, control device, and control system - Google Patents

Description

  The present invention relates to a roadside wireless communication device, a central device, a communication method, a computer program, a control device, and a control system.

  Patent Document 1 discloses a traffic control system that controls traffic terminals such as a traffic signal controller, an optical beacon, and a traffic information board with a central device of a traffic control center. An optical beacon is installed in each route (a road extending from an intersection in a predetermined direction) for each direction of travel of the vehicle, and the optical beacon is a mobile communication device (in-vehicle communication device) by optical communication using near infrared rays. The information data received from is collected in a central device, and in this central device, for example, signal control of traffic signals and traffic control for controlling traffic flow are executed.

JP 2005-268925 A

  In recent years, the use of roadside wireless communication devices instead of optical beacons has been studied. Since wireless communication has a wider communication range than optical beacons, it is only necessary to install one roadside wireless communication device at the intersection. However, in this case, since one roadside wireless communication device receives information data of mobile communication devices that respectively move on a plurality of routes, the central device that has acquired these information data from the roadside wireless communication device is The route (area) where the mobile communication device that is the transmission source of each information data exists cannot be determined.

  Therefore, in order to solve this problem, it is conceivable to add area information in which the mobile communication device exists to information data transmitted from the roadside wireless communication device to the central device. However, in this case, it is necessary to change the data format to be transmitted from the roadside radio communication device to the central device, so that the amount of renovation of the central device is larger and the installation cost is higher than when the data format is not changed. There is a drawback of becoming.

  The present invention has been made in view of such problems, and is compared to the case where area information in which a mobile communication device exists is added to data transmitted from a roadside wireless communication device to a central device. It is possible to determine the area where the mobile communication device exists in the central device while reducing the amount of modification of the device.

  The present invention is included in a reception unit that wirelessly receives information data that is transmitted from a mobile communication device and includes information that can identify the position of the mobile communication device, and the information data that the reception unit wirelessly receives A roadside wireless communication device including a transmission unit that transmits mobile body information to a central device, and the mobile communication device that is the transmission source is present based on the information data wirelessly received by the reception unit A determination unit that determines an area in which the determination unit determines, and the transmission unit performs different communication sessions established between the roadside wireless communication device and the central apparatus according to the area determined by the determination unit. And a roadside radio communicator configured to transmit the mobile information to the central device.

  From another viewpoint, the present invention relates to mobile information contained in the information data from a roadside wireless communication device that wirelessly received information data including information that can identify the position of the mobile communication device from the mobile communication device. A central device that receives and collects at least one of traffic information, traffic management and traffic control based on the mobile body information, and is connected to the roadside wireless communication device through a single communication line, and A communication unit that receives the mobile information using a different communication session established between the roadside wireless communication device and the central device according to an area in which a body communication device exists; and the communication session And a processing unit that determines an area in which the mobile communication device that is the transmission source of the mobile information is present.

  From another point of view, the present invention transmits the mobile unit information included in the information data to the central unit from the roadside radio communication unit that wirelessly received the information data including the information that can identify the position of the mobile communication unit. A determination method for determining an area in which the mobile communication device that is the transmission source exists based on information data that the roadside wireless communication device wirelessly received from the mobile communication device; The mobile unit from the roadside radio communication device to the central device using a different communication session established between the roadside radio communication device and the central device according to the area determined in the determination step. Based on the transmission step of transmitting information and the communication session used for transmission to the central device, the mobile communication device that is the transmission source of the mobile information exists. A determining step of determining A, a communication method comprising.

  From another point of view, the present invention transmits the mobile unit information included in the information data to the central unit from the roadside radio communication unit that wirelessly received the information data including the information that can identify the position of the mobile communication unit. A computer program for causing a computer to execute processing to determine an area in which the mobile communication device that is the transmission source is present based on the information data wirelessly received from the mobile communication device According to the determination step and the area determined in the determination step, the mobile unit information is transmitted to the central device using a different communication session established between the roadside wireless communication device and the central device. And a transmitting step for transmitting.

  From another viewpoint, the present invention provides a reception unit that wirelessly receives information data that is transmitted from a mobile communication device and that can identify the position of the mobile communication device, and the reception unit wirelessly receives the data. A transmission unit that transmits mobile information included in the information data to another device, wherein the reception unit is identified from the information data wirelessly received by the reception unit. A transmission determination unit that determines whether the transmission unit corresponds to a transmission timing to be transmitted to the other device based on a position, and the transmission unit has a positive determination result of the transmission determination unit; A roadside radio communicator configured to transmit the mobile information to the other device.

  From another viewpoint, the present invention relates to mobile information contained in the information data from a roadside wireless communication device that wirelessly received information data including information that can identify the position of the mobile communication device from the mobile communication device. A control device comprising: a communication unit that receives the control unit; and a control unit that outputs a command to end specific control based on the mobile body information received by the communication unit, wherein the control unit includes the mobile body When the communication unit receives the mobile object information when the communication device flows into a predetermined area, the control device is configured to output a command to end the specific control.

  From another viewpoint, the present invention provides a reception unit that wirelessly receives information data including information that can be transmitted from a mobile communication device and that can identify the position of the mobile communication device, and the reception unit wirelessly receives the data. Identified from a roadside wireless communication device having a transmission unit that transmits information data to the outside, a communication unit that receives the information data transmitted by the transmission unit of the roadside wireless communication device, and the information data received by the communication unit A control determination unit that determines whether it is time to output a command related to specific control based on the position of the mobile communication device, and the command is output when the determination result of the control determination unit is affirmative And a control device having a control unit.

  According to the present invention, the central device reduces the amount of refurbishment of the central device as compared with the case where the area information in which the mobile communication device exists is added to the data transmitted from the roadside wireless communication device to the central device. The area where the mobile communication device is present can be determined.

1 is a plan view of a road to which a traffic control system including a roadside wireless communication device and a central device according to a first embodiment of the present invention is applied. It is a functional block diagram which shows the internal structure of a roadside radio | wireless communication apparatus. It is explanatory drawing which shows the communication session established between the roadside radio | wireless communication apparatus and the central apparatus. It is a data structure figure of a packet. It is a functional block diagram which shows the internal structure of a central apparatus. It is a determination table showing a route corresponding to a destination port number. It is a flowchart which shows the process performed by the roadside radio | wireless communication apparatus. It is a flowchart which shows the process performed by a central apparatus. It is explanatory drawing which shows the modification of the communication session established between the roadside radio | wireless communication apparatus and the central apparatus, and the data structure of the packet transmitted using the communication session. It is the determination table used in the modification of FIG. It is a top view of the road where the traffic control system containing the roadside radio | wireless communication apparatus and center apparatus which concern on 2nd Embodiment of this invention is applied. It is a functional block diagram which shows the internal structure of the optical beacon of 2nd Embodiment. It is explanatory drawing which shows the data structure of the communication session established between the optical beacon controller of 2nd Embodiment and a central apparatus, and the packet transmitted using the communication session. It is the determination table used in 2nd Embodiment. It is a top view of the road where the traffic control system containing the roadside radio | wireless communication apparatus and center apparatus which concern on 3rd Embodiment of this invention is applied. It is a functional block diagram which shows the internal structure of the roadside radio | wireless communication apparatus of 3rd Embodiment. It is a transmission determination table used in 3rd Embodiment. It is a functional block diagram which shows the internal structure of the central apparatus of 3rd Embodiment. It is a control determination table used in 3rd Embodiment. It is a flowchart which shows the determination process of the transmission timing performed by the roadside radio | wireless communication apparatus of 3rd Embodiment. It is a flowchart which shows the determination process in case the transmission form is set transmission in 3rd Embodiment. It is a flowchart which shows the determination process in case the transmission form is reset transmission in 3rd Embodiment. It is a flowchart which shows the determination process in case the transmission form is shared transmission in 3rd Embodiment. It is a flowchart which shows the determination process in case the transmission form is combined transmission in 3rd Embodiment. It is a flowchart which shows the command process of FAST performed by the central apparatus of 3rd Embodiment. It is a functional block diagram which shows the modification of the control apparatus of 3rd Embodiment, and shows the internal structure of the control apparatus. It shows the other modification of the roadside radio communication apparatus and central apparatus of 3rd Embodiment, (a) is a functional block diagram which shows the internal structure of a roadside radio communication apparatus, (b) is an inside of a central apparatus. It is a functional block diagram which shows a structure.

[Description of Embodiment of the Present Invention]
First, the contents of the embodiment of the present invention will be listed and described.
(1) A roadside wireless communication device according to an embodiment of the present invention includes a receiving unit that wirelessly receives information data that is transmitted from a mobile communication device and includes information that can identify the position of the mobile communication device, A transmitter that transmits mobile unit information included in the information data wirelessly received by the receiver to a central device, based on the information data wirelessly received by the receiver, A determination unit that determines an area in which the mobile communication device that is the transmission source is present; and the transmission unit is determined by the determination unit between the roadside wireless communication device and the central device. The mobile unit information is transmitted to the central device using different communication sessions established according to areas.
Here, the “mobile information” is information included in the information data transmitted by the mobile communication device and excluding information that can identify the position of the mobile communication device.

  According to the roadside wireless communication device, based on the information data wirelessly received from the mobile communication device, the area where the mobile communication device that is the transmission source is present is determined, and established according to the determined area. Since the mobile device information is transmitted to the central device using the different communication sessions, the central device is based on the communication session established with the roadside wireless communication device, The area where the communication device exists can be determined. As a result, there is no need to change the data format transmitted from the roadside wireless communication device to the central device, so the area information in which the mobile communication device exists is added to the data transmitted from the roadside wireless communication device to the central device. It is possible to determine the area where the mobile communication device exists in the central device while reducing the amount of modification of the central device as compared with the case.

(2) It is preferable that the communication session of (1) is established based on different ports.
In this case, the data transmitted from the roadside radio communication device to the central device includes no area information in which the mobile communication device is present, or the central device is not modified or only minor modifications are made. Thus, the area where the mobile communication device exists in the central device can be determined.

(3) The communication session of (1) may be established based on different IP addresses.
In this case, the data transmitted from the roadside radio communication device to the central device includes no area information in which the mobile communication device is present, or the central device is not modified or only minor modifications are made. Thus, the area where the mobile communication device exists in the central device can be determined.

(4) The mobile communication device according to any one of (1) to (3) is an in-vehicle communication device mounted on a vehicle, and the mobile body information is preferably vehicle information related to the vehicle.
Here, the “vehicle information” is information related to the vehicle (vehicle ID, vehicle type information, etc.) included in the information data transmitted by the in-vehicle communication device, and is information excluding position information that can identify the position of the vehicle. is there.
In this case, the central device can determine the area where the vehicle equipped with the in-vehicle communication device is present.

(5) In the roadside wireless communication device of (4), it is preferable that the area is a route for each direction of the vehicle.
Here, the “direction” means a road that flows out in a predetermined direction starting from the intersection, or a road that flows in from a predetermined direction with respect to the intersection.
In this case, the central device can determine the route where the vehicle equipped with the in-vehicle communication device is present.

(6) The transmission unit of (5) may include one of the plurality of information data when the reception unit wirelessly receives a plurality of the information data including the same vehicle ID for each route. Preferably, the part is deleted.
In this case, since the amount of data transmitted to the central device can be reduced (thinned out), the transmission processing load of the roadside wireless communication device can be reduced, and the processing load of the central device can be reduced.

(7) When the distance from the intersection where the roadside wireless communication device is installed to the vehicle is within a predetermined range, the transmission unit of any of (4) to (6) is configured to transmit the vehicle information. Is preferably transmitted to the central unit.
In this case, even when the central device receives vehicle information from the roadside wireless communication device, the central device can determine the timing at which the vehicle passes through the intersection using the distance from the intersection to the vehicle.

(8) The roadside wireless communication device according to any one of (4) to (6) is configured such that the transmission unit is based on a position of the in-vehicle communication device identified from the information data wirelessly received by the reception unit. A transmission determination unit that determines whether or not the transmission timing to be transmitted to the central device is satisfied, and the transmission unit transmits the vehicle information to the central device when the determination result of the transmission determination unit is affirmative; It is preferably configured to transmit.
In this case, to determine whether the transmission unit corresponds to the transmission timing transmitted to the central device based on the position of the in-vehicle communication device, and to transmit vehicle information to the central device when the determination result is affirmative The amount of data transmitted to the central device can be further reduced.

(9) The central device according to the embodiment of the present invention from another viewpoint, from the roadside wireless communication device that wirelessly received information data including information that can identify the position of the mobile communication device from the mobile communication device, A central device that receives mobile body information included in the information data and performs at least one of traffic information collection, traffic management, and traffic control based on the mobile body information. The mobile unit information is connected using a different communication session established between the roadside radio communication unit and the central unit according to the area where the mobile unit is present and connected via a communication line. And a processing unit that determines an area in which the mobile communication device that is the transmission source of the mobile body information is present based on the communication session.

  The central unit is established with the roadside radio communication device in order to receive mobile body information from the roadside radio communication device using different communication sessions established according to the area where the mobile communication device exists. Based on the communication session, the area in which the mobile communication device that is the transmission source of the mobile information is present can be determined. As a result, there is no need to change the data format transmitted from the roadside wireless communication device to the central device, so that the mobile communication is performed in the central device while reducing the amount of modification of the central device compared to the case where this data format is changed. The area where the machine is present can be determined.

(10) It is preferable that the communication unit of (9) is configured to be able to receive the moving body information transmitted by an optical beacon.
In this case, even if the central unit is in a state where the mobile unit information transmitted from the roadside radio communicator and the mobile unit information transmitted from the optical beacon are mixed, the central unit does not cover the area where the mobile communicator exists. Can be determined.

(11) A communication method according to an embodiment of the present invention from another viewpoint is as follows: a roadside wireless communication device that wirelessly receives information data including information that can identify a position of a mobile communication device; A communication method for transmitting mobile information included in information data, wherein there is a mobile communication device that is a transmission source based on information data wirelessly received by the roadside wireless communication device from the mobile communication device. A determination step of determining a current area, and the roadside wireless communication using a different communication session established between the roadside wireless communication device and the central device according to the area determined in the determination step. Based on the transmission step of transmitting the mobile body information from the communication device to the central apparatus and the communication session used for transmission to the central apparatus, the mobile body information is a transmission source Including determination, and determining an area whose serial mobile communication device is present.

  According to the above communication method, after determining the area where the mobile communication device that is the transmission source of the wirelessly received information data is present by the roadside wireless communication device, different communication sessions established according to the determined area The mobile body information included in the information data is transmitted to the central device using the. Then, based on the communication session established with the roadside wireless communication device, the central device determines the area where the mobile communication device that is the transmission source of the mobile information exists. As a result, there is no need to change the data format transmitted from the roadside wireless communication device to the central device, so that the mobile communication is performed in the central device while reducing the amount of modification of the central device compared to the case where this data format is changed. The area where the machine is present can be determined.

(12) A computer program according to an embodiment of the present invention from another point of view can be obtained by performing the above operation on a central device from a roadside wireless communication device that wirelessly receives information data including information that can identify the position of a mobile communication device. A computer program for causing a computer to execute processing for transmitting mobile information included in information data, the mobile communication being a transmission source based on the information data received wirelessly from the mobile communication device Using a different communication session established between the roadside wireless communication device and the central apparatus according to the determination step of determining the area where the machine exists and the area determined in the determination step And transmitting the mobile body information to the central device.
According to the said computer program, there exists an effect similar to the roadside radio | wireless communication apparatus of said (1).

(13) A roadside wireless communication apparatus according to an embodiment of the present invention from another viewpoint wirelessly receives information data including information transmitted from the mobile communication apparatus and capable of identifying the position of the mobile communication apparatus. A roadside wireless communication apparatus comprising: a reception unit; and a transmission unit that transmits mobile body information included in the information data wirelessly received by the reception unit to another device, wherein the reception unit wirelessly receives the Based on the position of the mobile communication device identified from information data, the transmission unit includes a transmission determination unit that determines whether the transmission unit corresponds to a transmission timing to be transmitted to the other device, and the transmission unit includes: When the determination result of the transmission determination unit is affirmative, the mobile body information is transmitted to the other device.

  According to the roadside wireless communication device described above, it is determined whether or not the transmission timing corresponds to the transmission timing that the transmission unit transmits to another device based on the position of the mobile communication device, and when the determination result is affirmative Since the mobile unit information is transmitted to the other device, the amount of data transmitted to the other device can be reduced (thinned out). Thereby, the transmission processing load of the roadside wireless communication device can be reduced, and the processing load of other devices can be reduced.

(14) In the roadside wireless communication device of (13), it is preferable that the number of transmissions from the transmission unit to the other device is set to one. In this case, the amount of data transmitted to other devices can be further reduced.

(15) The mobile communication device according to (13) or (14) is an in-vehicle communication device mounted on a vehicle, and the information data includes information capable of identifying that the vehicle is a specific vehicle. The transmission determination unit is configured to determine whether or not the transmission timing is met when the vehicle is the specific vehicle based on the information data wirelessly received by the reception unit. Is preferred.
Here, the “specific vehicle” means an emergency vehicle such as a police car or an ambulance, and a public vehicle such as a bus.
In this case, the amount of data for transmitting the moving body information of the specific vehicle can be reduced.

(16) The transmission unit according to any one of (13) to (15) transmits the mobile body information in order to start specific control, and the transmission determination unit includes the mobile communication device. Is preferably determined to correspond to the transmission timing when it exists in the vicinity of a predetermined position in the predetermined area.
Here, the “vicinity range of the predetermined position” means that the predetermined position and its vicinity range are included.
In this case, when the mobile communication device is present in the vicinity of the predetermined position in the predetermined area, mobile information for starting specific control is transmitted. Certain controls can be reliably started when present.

(17) It is preferable that an installation position of the optical beacon is set in advance in the predetermined area of (16), and the predetermined position is an installation position of the optical beacon.
In this case, since the installation position of the optical beacon set in advance in the predetermined area can be used as the predetermined position for determining the presence of the mobile communication device, specific control is performed by the roadside wireless communication device. Therefore, the amount of renovation can be reduced.

(18) The vicinity range of the predetermined position in (16) or (17) is a range from a first distance to a second distance with a predetermined point as a reference (provided that the second distance> the first distance and the first distance) The transmission determination unit is configured to transmit the transmission timing when the mobile communication device is within a range from the first distance to the second distance. It is preferable to be configured to determine that the above applies.
In this case, the transmission determination unit determines whether or not the mobile communication device exists in the predetermined area by determining whether or not the mobile communication device exists within the range from the first distance to the second distance. It is possible to easily determine whether or not.

(19) The vicinity range of the predetermined position in (16) or (17) is a predetermined coordinate range, and the transmission determination unit includes the mobile communication device in the coordinate range. Sometimes, it may be configured to determine that it corresponds to the transmission timing.
In this case, the transmission determination unit easily determines whether the mobile communication device is present in the predetermined area by determining whether the mobile communication device is present within the predetermined coordinate range. can do.

(20) The transmission unit according to any one of (13) to (19) transmits the mobile body information in order to end specific control, and the transmission determination unit includes the mobile communication device. It is preferable that it is determined that the transmission timing corresponds to the transmission timing at the time when the flow enters the predetermined area.
In this case, since the mobile body information for ending the specific control is transmitted when the mobile communication device flows into the predetermined area, the specific control is performed when the mobile communication device flows into the predetermined area. It can be completed quickly.

(21) It is preferable that a plurality of the transmission timings are set in the predetermined area of any one of (16) to (20).
In this case, the installation cost can be reduced compared to the case where a plurality of optical beacons are installed in a predetermined area and the transmission timing is set.

(22) A control device according to an embodiment of the present invention from another viewpoint includes a roadside wireless communication device that wirelessly receives information data including information capable of identifying the position of a mobile communication device from the mobile communication device, A control device comprising: a communication unit that receives mobile body information included in the information data; and a control unit that outputs a command to end specific control based on the mobile body information received by the communication unit. The control unit is configured to output a command to end the specific control when the communication unit receives the mobile body information when the mobile communication device flows into a predetermined area.

  According to the control device, when mobile communication information is received from the roadside wireless communication device when the mobile communication device flows into the predetermined area, a command to end the specific control is output. Can be terminated.

(23) A control system according to an embodiment of the present invention from another viewpoint includes a receiving unit that wirelessly receives information data including information transmitted from a mobile communication device and capable of identifying the position of the mobile communication device. And a roadside wireless communication device having a transmission unit for transmitting the information data wirelessly received by the reception unit, a communication unit for receiving the information data transmitted by the transmission unit of the roadside wireless communication device, and the communication unit The control determination unit that determines whether it is the timing to output a command related to specific control based on the position of the mobile communication device identified from the received information data, and the determination result of the control determination unit is And a control device having a control unit that outputs the command when the result is affirmative.

  According to the control system, the roadside wireless communication device transmits the information data acquired from the mobile communication device to the control device, so that on the control device side, based on the position of the mobile communication device identified from the information data. Thus, it is possible to easily determine the timing for outputting a command related to specific control.

[Details of the embodiment of the present invention]
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
[System overall configuration]
FIG. 1 is a plan view of a road to which a traffic control system including a roadside wireless communication device and a central device according to a first embodiment of the present invention is applied. This traffic control system includes an in-vehicle communication device (mobile communication device) 7 mounted on a central device 3 provided in a traffic control room or the like, a roadside wireless communication device 4, a traffic signal 5, and a vehicle 6 traveling on a road R. Etc. In addition, as a mobile communication apparatus, it is not restricted to the vehicle-mounted communication apparatus 7, For example, the communication apparatus for pedestrians which a pedestrian has may be sufficient.

The inflow paths (directions) L1 to L4 and the outflow paths (directions) L5 to L8 at the intersection C shown in FIG. 1 are all one lane. The number of lanes is an example, and the structure of the intersection C is not limited to that shown in FIG.
The traffic signal device 5 includes a traffic signal light device 5a that emits red, blue and yellow light colors, and a traffic signal control device 5b for controlling the light color of the traffic signal light device 5a. The traffic signal controller 5b is connected to the roadside router 9 by a communication line 8a. The roadside router 9 is connected to a router 11 on the central device 3 side via a network 10.

  The signal control information i1 generated by the central device 3 that collects traffic information, manages traffic, and controls traffic is transmitted to the traffic signal controller 5b of each traffic signal 5 through the network 10 and the communication line 8a. On the other hand, the traffic signal controller 5b transmits execution information i2 indicating the actual results of signal control performed to the central device 3. The central device 3 performs traffic information collection, traffic management, and traffic control, but it is sufficient that at least one of them is performed.

  The roadside wireless communication device 4 is installed one by one at each intersection, wirelessly transmits information i3 to be transmitted to the in-vehicle communication device 7 of the traveling vehicle 6, and wirelessly transmits information to be transmitted by the in-vehicle communication device 7. Receive. The roadside wireless communication device 4 of the present embodiment is a medium / wide area wireless communication device (including 700 MHz band wireless communication) compliant with wireless LAN, WiMAX (Worldwide Interoperability for Microwave Access), etc., assuming an ITS wireless system. is there.

  The information i3 transmitted by the roadside wireless communication device 4 includes traffic information (congestion information, traffic regulation information, etc.) distributed by the central device 3. The information transmitted by the in-vehicle communication device 7 includes information data such as the vehicle ID, vehicle type information, and position information of the vehicle 6. The roadside wireless communication device 4 is connected to the roadside router 9 by a communication line 8b. Vehicle information (mobile information) i4 included in the information data transmitted by the in-vehicle communication device 7 is transmitted from the roadside wireless communication device 4 to the central device 3 through the communication line 8b and the network 10. Here, the “vehicle information” is information related to the vehicle 6 (vehicle ID, vehicle type information, etc.) included in the information data transmitted by the in-vehicle communication device 7 and position information that can identify the position of the vehicle 6. Excluding information.

  The in-vehicle communication device 7 has a communication function for wirelessly transmitting and receiving information to and from the roadside wireless communication device 4. When the vehicle 6 enters the communication area of the roadside wireless communication device 4 while the vehicle 6 is traveling toward the intersection C, the in-vehicle communication device 7 wirelessly receives the information i3 from the roadside wireless communication device 4 and includes information including the information data. Is wirelessly transmitted to the roadside wireless communication device 4 at a predetermined transmission cycle (for example, 100 milliseconds).

  In the traffic control system according to the present embodiment, the vehicle 6 is a specific vehicle including an emergency vehicle such as a police car or an ambulance or a public vehicle such as a bus, and the roadside wireless communication device 4 installed at an intersection through which the specific vehicle passes is specified. The inter-vehicle communication information received from the vehicle is transmitted to the central device 3, and the central device 3 controls the traffic signal lamp 5a so that the specific vehicle can preferentially pass through the intersection where the specific vehicle goes, or the specific vehicle approaches. This is used when transmitting information notifying other vehicles that the vehicle is going. This traffic control system may be applied to a general vehicle other than the specific vehicle as the vehicle 6.

[Roadside wireless communication device]
FIG. 2 is a functional block diagram showing the internal configuration of the roadside wireless communication device 4.
The roadside wireless communication device 4 includes a reception unit 401, a determination unit 402, a transmission unit 404, and a storage unit 405. The receiving unit 401 includes a communication interface that performs UD transmission, and wirelessly receives the information data including position information that can identify the position of the in-vehicle communication device 7 from the in-vehicle communication device 7. The receiving unit 401 may be a communication interface that performs U-shaped transmission. In the case of this U-shaped transmission, a communication session established based on an address corresponding to the IP address or port number is used instead of the IP address or port number.
Based on the information data received wirelessly by the reception unit 401, the determination unit 402 determines a route that is an area (wide area) where the in-vehicle communication device 7 that is the transmission source is present. Here, the “direction” means an inflow path or an outflow path in which the vehicle 6 on which the in-vehicle communication device 7 is mounted is in progress. A specific determination method of the determination unit 402 will be described later. In addition, as an area which the determination part 402 judges, what was divided for every lane other than what was divided by the route, and what was divided for every arbitrary area | regions may be sufficient.

A communication session is established in advance between the roadside wireless communication device 4 and the central device 3.
FIG. 3 is an explanatory diagram showing a communication session established between the roadside wireless communication device 4 and the central device 3. The roadside wireless communication device 4 has a plurality (16 in the illustrated example) of ports Pa1 to Pa16. Of these ports Pa1 to Pa16, ports Pa1 to Pa8 are used as transmission ports, and the remaining ports Pa9 to Pa16 are used as reception ports.
Different port numbers (“8001” to “8016” in the example) are set for the ports Pb1 to Pb16. In the present embodiment, the port numbers of the ports Pa1 to Pa8 are used as transmission source port numbers (“8001” to “8008” in the figure), and the port numbers of the remaining ports Pa9 to Pa16 are the destination port numbers (see FIG. In the example, “8009” to “8016”) are used.

On the other hand, the central device 3 has a plurality (16 in the illustrated example) of ports Pb1 to Pb16. Of these ports Pb1 to Pb16, the ports Pb1 to Pb8 are used as reception ports, and the remaining ports Pb9 to Pb16 are used as transmission ports.
Different port numbers (“8001” to “8016” in the example) are set for the ports Pb1 to Pb16. In the present embodiment, the port numbers of the ports Pb1 to Pb8 are used as the destination port numbers (“8001” to “8008” in the figure), and the port numbers of the remaining ports Pb9 to Pb16 are the source port numbers (see FIG. In the example, “8009” to “8016”) are used.

  In FIG. 2, a transmission unit 404 includes a communication interface that performs UD transmission, and transmits vehicle information i4 included in the information data wirelessly received by the reception unit 401 to the central device 3 using the communication session. . When the determination unit 402 determines that the route is the inflow route L1, the transmission unit 404 of the present embodiment includes the port Pa1 that is the transmission port of the roadside wireless communication device 4 and the port Pb1 that is the reception port of the central device 3. Communication session established between the two. Similarly, when the route is determined to be any of the inflow paths (outflow paths) L2 to L8, the transmission unit 404 transmits the ports Pa2 to Pa8 that are transmission ports of the roadside wireless communication device 4 and the central device 3. Different communication sessions established as shown in the figure are used between the receiving ports Pb2 to Pb8. As described above, the transmission unit 404 transmits using different ports between the roadside wireless communication device 4 and the central device 3 in accordance with the routes L1 to L8.

  FIG. 4 is a data structure diagram of a packet transmitted from the transmission unit 404 to the central apparatus 3. The packet in the present embodiment has an IP header, a UDP header, and data areas from the top. The IP header includes a destination IP address and a source IP address. In the example of the figure, only the destination IP address is shown. The UDP header includes a destination port number and a transmission source port number. In the figure, only the destination port number is shown. The data area includes vehicle information i4 acquired from information data wirelessly received by the receiving unit 401.

  Therefore, when using a communication session established between the port Pa1 of the roadside wireless communication device 4 and the port Pb1 of the central device 3, the transmission unit 404 includes “8001” that is the destination port number in the UDP header. Send packet in state. Similarly, when using a communication session established between the ports Pa2 to Pa8 of the roadside wireless communication device 4 and the ports Pb2 to Pb8 of the central device 3, the transmission unit 404 adds other information to the UDP header as shown in the figure. The packet is transmitted in a state including any one of “8002” to “8008” that is the destination port number of the destination.

When the transmission unit 404 transmits a packet to the central device 3 for each piece of information data wirelessly received by the reception unit 401 one after another from the in-vehicle communication device 7, the transmission load of the roadside wireless communication device 4 and the traffic on the communication line increase. Since a large processing load is applied to the device 3, processing for reducing (thinning out) the amount of data transmitted to the central device 3 is performed. Specifically, the transmission unit 404 receives the information data including the same vehicle ID for each of the routes L1 to L8 when the reception unit 401 wirelessly receives a predetermined number of times during a predetermined time (predetermined period). 3 transmits the information data once. This thinning process is merely an example, and the data amount may be reduced by other methods.
The storage unit 405 stores a computer program that executes the above-described determination processing by the determination unit 402 and the above-described transmission processing by the transmission unit 404.

[Central equipment]
FIG. 5 is a functional block diagram showing the internal configuration of the central device 3. The central device 3 includes a communication unit 301, a processing unit 302, and a storage unit 303 therein. The communication unit 301 includes a communication interface that supports both U-type transmission and UD-type transmission, and transmits signal control information i1 related to signal lamp color switching timing for each predetermined time to the traffic signal controller 5b.
Further, the communication unit 301 receives vehicle information i4 including the vehicle ID and vehicle type information of the vehicle 6 from the roadside wireless communication device 4. Specifically, the communication unit 301 is connected to the roadside wireless communication device 4 via the roadside router 9 through one communication line 8b (see FIG. 1), and between the central device 3 and the roadside wireless communication device 4. The vehicle information i4 is received using the communication session established in.

Based on the communication session used by the communication unit 301 and the determination table (see FIG. 6) stored in the storage unit 303, the processing unit 302 includes the in-vehicle communication device 7 that is the transmission source of the vehicle information i4. Determine the route you are on. The determination table is a list showing routes L1 to L8 corresponding to the destination port numbers “8001” to “8008”. The processing unit 302 determines a route corresponding to the destination port number included in the UDP header of the communication session used by the communication unit 301 with reference to the determination table.
The storage unit 303 stores a computer program that executes the above-described determination process by the processing unit 302 and the determination table.

[Communication method]
FIG. 7 is a flowchart showing processing executed by the roadside wireless communication device 4. FIG. 8 is a flowchart showing processing executed by the central device 3. Hereinafter, a communication method for transmitting vehicle information i4 from the roadside wireless communication device 4 to the central device 3 will be described with reference to FIGS.
First, when the information data transmitted by the in-vehicle communication device 7 is wirelessly received by the receiving unit 401 of the roadside wireless communication device 4 (step S1 in FIG. 7), the vehicle vehicle type and vehicle ID are recognized from the information data (in FIG. 7). Step S2). Next, the determination unit 402 of the roadside wireless communication device 4 determines the route in which the in-vehicle communication device 7 that is the transmission source exists based on the position information included in the information data wirelessly received by the reception unit 401. (Judgment step, step S3 in FIG. 7). For example, as shown in FIG. 1, when the roadside wireless communication device 4 is installed at the intersection C, the determination unit 402 determines that the vehicle 6 on which the in-vehicle communication device 7 is mounted is connected to the inflow channels L1 to L4 and the outflow channel L5. It is determined which road of ~ L8 is traveling.

  Specifically, first, the determination unit 402 is based on position data indicating the center position of the intersection C stored in the storage unit 405 and position information indicating the latitude and longitude of the vehicle 6 included in the information data. The inclination angle of the virtual straight line connecting these two points with respect to the true north direction is calculated, and the approximate direction in which the vehicle 6 exists is determined from the central position of the intersection C. For example, when the vehicle 6 travels through the position shown in FIG. 1, the determination unit 402 can determine that the vehicle 6 is located in the inflow path L1 or the outflow path L5.

Next, the determination unit 402 calculates a distance between the two points, and determines a route depending on how the distance changes with time. That is, when the distance between the two points decreases with time, it is determined that the vehicle 6 is traveling on the inflow path, and conversely, when the distance between the two points increases with time. Determines that the vehicle 6 is traveling on the outflow path. For example, when the vehicle 6 is traveling at the position shown in FIG. 1, the distance between the two points becomes shorter as time passes. Therefore, the determination unit 402 determines that the vehicle 6 is traveling on the inflow path L1. To do.
The determination unit 402 is not limited to the above-described determination method. For example, the determination unit 402 performs a map matching process based on a plurality of pieces of position information of the vehicle 6 and road map data stored in the storage unit 405. A route in which 6 is present may be determined.

After the determination unit 402 determines the route in step S <b> 3, the transmission unit 404 performs a thinning-out process for data transmitted to the central device 3. First, the transmission unit 404 determines whether or not information i4 including the same vehicle ID has been received one after another within the past predetermined time in the reception unit 401 (step S4 in FIG. 7). When the reception unit 401 receives information i4 including the same vehicle ID one after another within a certain past time, the transmission unit 404 then transmits the information i4 including the same vehicle ID received in the past. It is determined whether or not the original route is the same as the route in which the in-vehicle communication device 7 exists (step S5 in FIG. 7). If the routes are the same, then the transmission unit 404 determines whether or not the reception unit 401 has received the information i4 including the same vehicle ID N times (N ≧ 2) (FIG. 7). Step S6). When the reception unit 401 receives the information i4 including the same vehicle ID N times, the process proceeds to step S7 in FIG.
On the other hand, if the information i4 including the same vehicle ID is not received in step S4, if the route is not the same in step S5, or if not received N times in step S6, the process returns to step S1.

In step 7 of FIG. 7, the transmission unit 404 has a predetermined range in which the distance from the center position of the intersection C to the vehicle 6 is that the in-vehicle communication device 7 that is the transmission source of one or more times of N pieces of information data. It is determined whether it is received from within. If the distance is received from within a predetermined range, the transmitter 404 transmits the vehicle information i4 once to the central device 3 (transmission step, step S8 in FIG. 7).
At that time, the transmission unit 404 performs transmission using different communication sessions established between the roadside wireless communication device 4 and the central device 3 according to the route determined by the determination unit 402. For example, when the determination unit 402 determines that the inflow path L1 is used, a communication session established between the port Pa1 that is the transmission port of the roadside wireless communication device 4 and the port Pb1 that is the reception port of the central device 3 is used. (See FIG. 3).
On the other hand, when the distance from the center position of the intersection C to the position where the vehicle 6 is present is not within the predetermined range in step 7, the process returns to step S1.

  In step S8, the transmission unit 404 transmits the vehicle information i4 to the central device 3 using the established communication session. At that time, the transmitter 404 transmits the packet in a state where the vehicle information i4 is included in the data area of the packet and the destination port number of the communication session is included in the UDP header of the packet. For example, when transmitting a packet using a communication session established between the port Pa1 of the roadside wireless communication device 4 and the port Pb1 of the central device 3, the transmission unit 404 is set to the port Pb1 of the central device 3. The packet is transmitted with the destination port number “8001” included in the UDP header.

When the communication unit 301 receives the packet including the vehicle information i4 transmitted from the transmission unit 404 of the roadside wireless communication device 4 (step S11 in FIG. 8), the central device 3 communicates with the processing unit 302 of the central device 3. The destination port number included in the UDP header of the communication session used by the unit 301 is acquired, and the route corresponding to the destination port number is determined with reference to the determination table (see FIG. 6) (determination step, FIG. 8). Step S12).
For example, when the destination port number included in the UDP header of the communication session used by the communication unit 301 is “8001”, the processing unit 302 refers to the determination table and finds a route corresponding to the destination port number “8001”. It determines with it being the inflow path L1.

  As described above, according to the roadside wireless communication device 4 and the central device 3 of the present embodiment, based on the information data wirelessly received from the in-vehicle communication device 7, the route in which the in-vehicle communication device 7 that is the transmission source exists. In order to transmit the vehicle information i4 included in the information data to the central device 3 using a different communication session established according to the determined route, the central device 3 communicates with the roadside wireless communication device 4. Based on the communication session established between them, the route where the in-vehicle communication device 7 that is the transmission source of the vehicle information i4 is present can be determined. Thereby, since it is not necessary to change the data format transmitted from the roadside wireless communication device 4 to the central device 3, the data format of the central device 3 is changed compared to the case where the data format transmitted from the roadside wireless communication device 4 to the central device 3 is changed. It is possible to determine the route where the in-vehicle communication device 7 exists in the central device 3 while reducing the amount of repair.

Moreover, since the communication session established based on a different port for each of the plurality of routes L1 to L8 is used between the roadside wireless communication device 4 and the central device 3, transmission is performed from the roadside wireless communication device 4 to the central device 3. Compared to the case where the area information in which the in-vehicle communication device 7 exists is included in the data to be processed, the in-vehicle communication device 7 in the central device 3 can be obtained without any modification of the central device 3 or by making minor modifications to the central device 3. Can be determined.
In addition, the transmission unit 404 of the roadside wireless communication device 4 transmits vehicle information to the central device 3 when the reception unit 401 wirelessly receives information data including the same vehicle ID for each route a predetermined number of times during a predetermined period. Since i4 is transmitted once, the amount of data transmitted to the central device 3 can be reduced (thinned out). Thereby, the transmission processing load of the roadside wireless communication device 4 can be reduced, and the processing load of the central device 3 can be reduced.
Further, since the transmission unit 404 of the roadside wireless communication device 4 transmits to the central device 3 when the distance from the intersection C to the vehicle 6 is within a predetermined distance range, the central device 3 includes the roadside wireless communication device 4. Even when the vehicle information i4 is received from the vehicle, the timing at which the vehicle 6 passes through the intersection C can be determined using the distance from the intersection C to the vehicle 6.

[Variation of communication session]
FIG. 9 is an explanatory diagram illustrating a modified example of a communication session established between the roadside wireless communication device 4 and the central apparatus 3 according to the present embodiment and a data structure of a packet transmitted using the communication session. FIG. 10 shows a determination table used by the central device 3 in the modification of FIG. In this modification, the roadside wireless communication device 4 has a plurality (eight in this case) of different IP addresses (for example, “10.1.1.1” to “10.1.1.8”). .

The transmission unit 404 of the roadside wireless communication device 4 in this modification uses a communication session established based on a different transmission source IP address for each of the plurality of routes L1 to L8. For example, as illustrated in FIG. 9, when the determination unit 402 determines that the route is the inflow route L1, the transmission unit 404 uses a communication session established by the transmission source IP address “10.1.1.1”. To send. Similarly, when the determination unit 402 determines that the route is one of the inflow channel L2 to the outflow channel L8, the transmission unit 404 transmits the destination IP addresses “10.1.1.2” to “10” of the central device 3. ... 1.1.8 "are transmitted using communication sessions established by different source IP addresses as shown in the figure.
At that time, as shown in FIG. 9, the transmission unit 404 transmits the packet in a state in which the vehicle information i4 is included in the data area of the packet and the source IP address of the communication session is included in the IP header of the packet.

  The central device 3 receives the packet including the vehicle information i4 transmitted from the transmission unit 404 of the roadside wireless communication device 4 by the communication unit 301, and then uses the processing unit 302 to set the IP header of the communication session used by the communication unit 301. The included source IP address is acquired, and the route corresponding to the source IP address is determined with reference to the determination table (see FIG. 10). This determination table is a list showing routes L1 to L8 corresponding to the transmission source IP addresses “10.1.1.1” to “10.1.1.8”. For example, when the transmission source IP address included in the IP header of the communication session used by the communication unit 301 is “10.1.1.1”, the processing unit 302 refers to the determination table to determine the transmission source IP address. It is determined that the path corresponding to “10.1.1.1” is the inflow path L1.

  As described above, according to the roadside wireless communication device 4 and the central device 3 of the present modification, it is established between the roadside wireless communication device 4 and the central device 3 using different IP addresses for the plurality of routes L1 to L8. Since the central device 3 uses a communication session established with the optical beacon 20 described later (see FIGS. 13 and 14), the central device 3 has already been introduced. By utilizing the conventional central device, it is possible to determine the route where the in-vehicle communication device 7 exists in the central device 3.

[Second Embodiment]
FIG. 11 is a plan view of a road to which a traffic control system including the roadside wireless communication device 4 and the central device 3 according to the second embodiment of the present invention is applied. The traffic control system of this embodiment is different from that of the first embodiment in that road-to-vehicle communication with the in-vehicle communication device 7 is performed not only by the roadside wireless communication device 4 but also by the optical beacon 20. The optical beacon 20 performs wireless communication using an optical signal with the in-vehicle communication device 7 of the traveling vehicle 6, that is, optical communication using near infrared rays as a communication medium, and also functions as an optical vehicle sensor. In the present embodiment, a total of eight optical beacons 20 are provided on the upstream side of the inflow paths (routes) L1 ′ to L4 ′ and the outflow paths (routes) L5 ′ to L8 ′ at the intersection C ′.

  Each optical beacon 20 includes an optical beacon controller 21 and an optical beacon head (projector / receiver) 22 connected to the optical beacon controller 21. The optical beacon head 22 of each optical beacon 20 is installed right above the upstream side of the inflow paths L1 'to L4' and right above the upstream side of the outflow paths L5 'to L8'. The optical beacon controller 21 is connected to the roadside router 12 by a communication line 8c. The roadside router 12 is connected to the router 11 on the central device 3 side via the network 10. The optical beacon 20 receives uplink data including information data such as a vehicle ID of the vehicle 6 and vehicle type information from the in-vehicle communication device 7 of the vehicle 6 traveling in the vicinity of the installation position. Then, the vehicle information i4 included in the uplink data acquired by the optical beacon controller 21 is transmitted to the central device 3 through the communication line 8c and the network 10. Information including traffic information is transmitted from the central apparatus 3 to each optical beacon 20 through the communication line 8c.

FIG. 12 is a functional block diagram showing the internal configuration of the optical beacon 20. The optical beacon head 22 includes an optical communication unit 23 that transmits and receives optical signals to perform optical communication, and a vehicle detection sensor unit 24 for detecting the presence or absence of the vehicle 6 that passes directly under the optical beacon head 22. ing.
The optical communication unit 23 includes a transmission unit 25 and a reception unit 26. The transmission unit 25 includes a light projecting unit that transmits an optical signal for optical communication, and has a function of transmitting downlink light including near infrared rays. Specifically, the transmission unit 25 transmits a downlink circuit i3 transmitted from the optical beacon controller 21 into a transmission signal, and light emission that converts the output transmission signal into an optical signal in the downlink direction. It is comprised with the light emitting element which consists of diodes (LED). For this reason, the transmission part 25 can transmit the downlink data i3 to the vehicle-mounted communication apparatus 7 by radio | wireless communication (optical communication).

  The receiving unit 26 includes a light receiving unit that receives an optical signal from the in-vehicle communication device 7, and has a function of receiving uplink light including a near infrared ray from the in-vehicle communication device 7. Specifically, the receiving unit 26 includes a light receiving element such as a photodiode and a light receiving circuit that amplifies an electric signal output from the light receiving element and generates a digital signal. Then, the optical beacon controller 21 generates uplink data from the signal generated by the receiving unit 26. Thus, the receiving unit 26 can receive the uplink data transmitted by the in-vehicle communication device 7 by wireless communication (optical communication).

  The optical beacon controller 21 includes a communication unit 27 that performs bidirectional communication with the central device 3 and road-to-vehicle communication with the in-vehicle communication device 7. The communication unit 27 includes a communication interface that performs UD transmission, and when transmitting the uplink data i4 to the central device 3, the routes L1 ′ to L8 in which the optical beacon head 22 that has received the uplink data i4 is installed. In response to ', a different communication session is established with the central apparatus 3. The communication unit 27 may be a communication interface that performs U-shaped transmission.

  FIG. 13 is an explanatory diagram illustrating a communication session established between the optical beacon controller 21 and the central apparatus 3 according to the present embodiment, and a data structure of a packet transmitted using the communication session. Each optical beacon controller 21 has the same number (8 in this case) of different IP addresses as the number of optical beacon controllers 21.

The communication unit 27 of the optical beacon controller 21 transmits using a communication session established with a different IP address for each of the plurality of routes L1 ′ to L8 ′. For example, as illustrated in FIG. 13, when transmitting the uplink data i4 acquired from the optical beacon head 22 installed directly above the inflow path L1 ′ to the central device 3, the communication unit 27 transmits the source IP address “10 .1.1.1 "is transmitted using the communication session established. Similarly, when transmitting the uplink data i4 acquired from the optical beacon head 22 installed right above any of the inflow path L2 ′ to the outflow path L8 ′, the communication unit 27 transmits the transmission source of the central device 3 Each of the IP addresses “10.1.1.2” to “10.1.1.8” is transmitted using a communication session established with a different source IP address as illustrated.
At that time, as shown in FIG. 13, the communication unit 27 includes the vehicle information i4 in the data area of the packet and transmits the packet in a state in which the source IP address of the communication session is included in the IP header of the packet.

  As shown in FIG. 11, the communication unit 301 (see FIG. 5) of the central device 3 is connected to the roadside wireless communication device 4 via the roadside router 9 via the communication line 8 b and is connected to the optical beacon via the roadside router 12. Connected to the controller 21 via a communication line 8c. Thereby, the communication part 301 can receive the packet containing the information data transmitted from the transmission part 404 of the roadside wireless communication apparatus 4, and also receives the vehicle information i4 transmitted from the communication part 27 of the optical beacon controller 21. It is configured to be able to receive packets that contain it.

When the communication unit 301 receives the packet including the vehicle information i4 transmitted from the transmission unit 404 of the roadside wireless communication device 4, the processing unit 302 of the central device 3 stores the storage unit 303 as in the first embodiment described above. The route is determined with reference to the determination table of FIG.
In addition, when the communication unit 301 receives the packet including the vehicle information i4 transmitted from the communication unit 27 of the optical beacon controller 21, the processing unit 302 is used between the central device 3 and the optical beacon controller 21. A source IP address included in the IP header of the communication session is acquired, and a route corresponding to the source IP address is determined with reference to a determination table (see FIG. 14) separately stored in the storage unit 303. . This determination table is a list showing routes L1 ′ to L8 ′ corresponding to the destination port numbers “10.1.1.1” to “10.1.1.8”. For example, when the transmission source IP address included in the IP header of the communication session used by the communication unit 301 is “10.1.1.1”, the processing unit 302 refers to the determination table to determine the transmission source IP address. It is determined that the route corresponding to “10.1.1.1” is the inflow route L1 ′.
The points that are not described in the second embodiment are the same as those in the first embodiment.

  As described above, according to the central device 3 of the present embodiment, the communication unit 301 is configured to be able to receive not only the vehicle information i4 transmitted by the roadside wireless communication device 4, but also the vehicle information i4 transmitted by the optical beacon 20. Therefore, the central device 3 is the transmission source of the vehicle information i4 even if the vehicle information i4 transmitted from the roadside wireless communication device 4 and the vehicle information i4 transmitted from the optical beacon 20 are mixed. A route in which a certain in-vehicle communication device 7 exists can be determined.

[Third Embodiment]
FIG. 15 is a plan view of a road to which a traffic control system including the roadside wireless communication device 4 and the central device 3 according to the third embodiment of the present invention is applied. The traffic control system of this embodiment is a modification of the traffic control system of the first embodiment. More specifically, the traffic control system is a modification of the thinning process that reduces the amount of data transmitted from the roadside wireless communication device 4 to the central device 3. An example is shown. The thinning process according to the present embodiment is used in a field emergency support system (Fast Emergency Vehicle Preemption Systems: hereinafter referred to as “FAST”).

  The FAST transmits vehicle information received from an emergency vehicle (specific vehicle) such as a police car or an ambulance that the roadside wireless communication device 4 travels upstream of the intersection to the central device 3, and the traffic signal controller 5b from the central device 3. By transmitting a control command to the vehicle, signal control (specific control) is performed to adjust the green signal time or red signal time of the inflow path so that the emergency vehicle can pass through the intersection with a green signal. This signal control is performed by blue extension control for continuously displaying a blue signal on an inflow path through which an emergency vehicle passes, or red shortening control for switching to a green signal by shortening the display time of the red signal as much as possible. In the present embodiment, FAST is performed at a plurality of intersections C1 and C2 existing within a range surrounded by a two-dot chain line in the drawing.

  In addition to the FAST, the thinning-out process of the present embodiment is a signal control that adjusts the green signal time or the red signal time of the inflow route so that public vehicles (specific vehicles) such as route buses can pass through the intersection with a green signal (specific signal The present invention can also be applied to cases where other specific control is performed, such as a public transportation priority system (hereinafter referred to as “PTPS”) in which control is performed. Further, the thinning process according to the present embodiment may be applied to a general vehicle other than the specific vehicle. In this case, the thinning process of the present embodiment can be used when the traffic signal controller 5b performs sensitive control for a general vehicle. Moreover, even if the sensitive control for the general vehicle is not performed, the thinning process of the present embodiment can be used in the same manner for both the general vehicle and the specific vehicle. Further, the thinning process of the present embodiment may be performed for a specific vehicle, and the thinning process of the first embodiment may be performed for a general vehicle.

[Roadside wireless communication device]
FIG. 16 is a functional block diagram showing the internal configuration of the roadside wireless communication device 4 of the present embodiment.
The roadside wireless communication device 4 includes a reception unit 401, a determination unit 402, a transmission unit 404, a storage unit 405, and a transmission determination unit 406. When the transmission determination unit 406 determines that the vehicle 6 is an emergency vehicle based on the vehicle type information included in the information data wirelessly received by the reception unit 401, the transmission determination unit 406 is based on the position of the in-vehicle communication device 7 identified from the information data. Thus, it is determined whether the transmission unit 404 corresponds to the transmission timing transmitted to the central device (control device) 3 which is another device. When the determination result of the transmission determination unit 406 is affirmative, that is, when the transmission determination unit 406 determines that it corresponds to the transmission timing, the transmission unit 404 transmits vehicle information (mobile body information) i4 to the central device 3. The number of transmissions is set to one time, for example.

The transmission timing includes a timing for outputting a command for setting (starting) FAST in the central apparatus 3 and a timing for outputting a command for resetting (ending) FAST. The transmission determination unit 406 performs different determinations based on a plurality of transmission modes configured by using one or both of these two timings.
As the plurality of transmission modes, “set transmission” that only outputs a command for setting FAST, “reset transmission” that only outputs a command for resetting FAST, and both commands for resetting and setting FAST are the same. There are four types: “shared transmission” that is output at timing and “combined transmission” that outputs both commands for resetting and setting FAST at different timings.

These transmission forms are preset for each of the routes L1 to L8 in the transmission determination table (see FIG. 17) stored in the storage unit 405 according to the FAST implementation area, the road length between intersections, and the like. Has been. In the present embodiment, as shown in FIG. 17, set transmission is “01”, reset transmission is “10”, shared transmission is “00”, and combined transmission is “11”, which are stored in the transmission determination table. . Here, the transmission form of the inflow paths L1, L2, and L4 is set transmission, the transmission form of the inflow path L3 is shared transmission, the transmission form of the outflow paths L5, L6, and L8 is reset transmission, and the transmission form of the inflow path L7 is combined transmission. As each.
In the transmission determination table, a distance D described later is set for each of the routes L1 to L8.

When the transmission form is set transmission, the transmission determination unit 406 sets the transmission timing for setting FAST when the in-vehicle communication device 7 exists in the vicinity of a predetermined position in a predetermined area (narrow area). Judge as applicable. Here, the “vicinity range of the predetermined position” means that the predetermined position and its vicinity range are included.
As shown in FIG. 15, the predetermined area includes a plurality of areas S1 to S8. Each area S1 to S8 is a range including the installation position of the optical beacon preset in each of the routes L1 to L8 (the white circle portion shown in each route in the figure), and the optical beacon is light It is set to a range where communication is possible. In this embodiment, the installation position of this optical beacon is the predetermined position.

The vicinity range of the predetermined position is, for example, a first distance (D−α) to a second distance using a first distance (D−α) and a second distance (D + β) based on the intersection C2 (predetermined point). It is set as a range up to the distance (D + β) (including the case where the second distance (D + β)> the first distance (D−α) and the first distance (D−α) = 0). Note that D is the distance from the intersection C2 to the predetermined position (the installation position of the optical beacon), and α and β are arbitrary values, and α ≧ 0 and β ≧ 0. Therefore, the transmission determination unit 406 sets the transmission timing when the distance from the intersection C2 to the position where the in-vehicle communication device 7 is within the range from the first distance (D−α) to the second distance (D + β). Judge as applicable.
Note that the first distance and the second distance are based on the intersection C2, but may be based on any other point such as a stop line before the intersection C2.
Further, the vicinity range of the predetermined position may be set as a predetermined coordinate range. In this case, for example, the transmission determination unit 406 sets the coordinate range as a range satisfying the relationship of a1 ≦ x ≦ a2 and b1 ≦ y ≦ b2 with respect to the position coordinates (x, y) of the in-vehicle communication device 7. When this relationship is satisfied, it can be determined that the transmission timing is satisfied.
When the receiving unit 401 of the roadside wireless communication device 4 receives information data from the in-vehicle communication device 7 located upstream of the predetermined position, the transmission determining unit 406 determines that the in-vehicle communication device 7 uses the information data. It is also possible to calculate a required time until the vehicle passes through the predetermined position (= remaining distance / speed to the predetermined position) and determine that the transmission timing is satisfied when the required time has elapsed.

When the transmission form is reset transmission, the transmission determination unit 406 determines that it corresponds to the transmission timing for resetting FAST when the in-vehicle communication device 7 flows into the predetermined area.
When the transmission form is shared transmission, the transmission determination unit 406 sets the transmission timing for resetting FAST and the FAST when the in-vehicle communication device 7 is in the vicinity of the predetermined position in the predetermined area. It is determined that it corresponds to the transmission timing.

  When the transmission form is combined transmission, the transmission determination unit 406 individually determines a plurality of transmission timings set in a predetermined area. Specifically, the transmission determination unit 406 determines that the transmission timing for resetting FAST corresponds to the determination method in the case of reset transmission described above, and sets the transmission timing to set FAST by the determination method in the case of set transmission described above. Judge as applicable.

  In the present embodiment, the upstream end side of the areas S5 to S8 of the outflow paths L5 to L8 is set to a range including the inside of the intersection C2. Therefore, the transmission timing for resetting FAST in each of the outflow paths L5 to L8 is the time when the in-vehicle communication device 7 flows into each of the areas S5 to S8, that is, the time when it flows into the intersection C2 (the black circle portion shown in each outflow path in the figure) Therefore, the FAST performed at the intersection C2 can be quickly reset.

[Central equipment]
FIG. 18 is a functional block diagram showing the internal configuration of the central device 3. The central device 3 includes a communication unit 301, a processing unit 302, a storage unit 303, and a control unit 304 inside.
When the control unit 304 determines that the vehicle 6 is an emergency vehicle based on the vehicle type information included in the vehicle information i4 received by the communication unit 301 from the roadside wireless communication device 4, the vehicle-mounted communication device determined by the processing unit 302 is determined. A command for setting FAST and a command for resetting are selectively output based on the route in which 7 exists. The command output from the control unit 304 is transmitted from the communication unit 301 to the traffic signal controller 5b.

The control unit 304 refers to the control determination table (see FIG. 19) stored in the storage unit 303, identifies the type of transmission mode set for each of the routes L1 to L8, and responds to each transmission mode. The command for setting FAST and the command for resetting are selectively output.
Specifically, when the transmission form is set transmission, the control unit 304 outputs a command to set FAST, and when the transmission form is reset transmission, the control unit 304 outputs a command to reset FAST. When the transmission mode is shared transmission, the control unit 304 continuously outputs a command to reset FAST and a command to set FAST in this order. Further, when the transmission form is combined transmission, the control unit 304 outputs a command to reset FAST when the vehicle information i4 of the emergency vehicle is first received from the roadside wireless communication device 4, and then from the roadside wireless communication device 4 When the vehicle information i4 of the emergency vehicle is received again, a command to set FAST is output.

[Transmission timing judgment processing]
FIG. 20 is a flowchart illustrating transmission timing determination processing executed by the roadside wireless communication device 4. FIG. 21 to FIG. 24 are flowcharts illustrating determination processing in each case where the transmission form is set transmission, reset transmission, shared transmission, and combined transmission. The transmission timing determination process executed by the roadside wireless communication device 4 will be described below with reference to FIGS.
As shown in FIG. 20, first, when the information data transmitted by the in-vehicle communication device 7 is wirelessly received by the receiving unit 401 of the roadside wireless communication device 4 (step ST1), the vehicle vehicle type recognized from the information data is an emergency vehicle. (Step ST2). If the vehicle type is not an emergency vehicle, the process returns to step ST1.

  If it is confirmed in step ST2 that the vehicle type is an emergency vehicle, the determination unit 402 determines, based on the position information included in the information data wirelessly received by the reception unit 401, the in-vehicle communication device 7 that is the transmission source. Is determined (step ST3). The determined route is stored in the storage unit 405 (step ST4).

  Next, the transmission determination unit 406 confirms the transmission form corresponding to the route stored in the storage unit 405 with reference to the transmission determination table (see FIG. 17). When the transmission form is set transmission (in the case of “Yes” in step ST5), the transmission determination unit 406 performs determination processing corresponding to set transmission (step ST6). If the transmission mode is reset transmission (“Yes” in step ST7), transmission determination section 406 performs determination processing corresponding to reset transmission (step ST8). If the transmission form is shared transmission (“Yes” in step ST9), transmission determination section 406 performs determination processing corresponding to shared transmission (step ST10). Further, when the transmission form is combined transmission (in the case of “No” in step ST9), transmission determination section 406 performs determination processing corresponding to combined transmission (step ST11).

As shown in FIG. 21, when the transmission form is set transmission, transmission determination section 406 first checks whether or not transmission for setting FAST has already been performed (step ST21). If transmission for setting FAST has already been performed, the transmission determination unit 406 ends the determination process.
On the other hand, when transmission for setting FAST has not been performed yet, the transmission determination unit 406 has the vehicle-mounted communication device 7 from the intersection based on the position information included in the information data wirelessly received by the reception unit 401. The distance to the position is calculated (step ST22). Then, the transmission determination unit 406 refers to the transmission determination table, specifies the distance D corresponding to the route stored in the storage unit 405, and the distance calculated in step ST22 is the first distance (D−α). It is determined whether it is in the range from to the second distance (D−β) (step ST23).

If the determination result in step ST23 is affirmative, the transmission determination unit 406 determines that it is the transmission timing for setting FAST, and transmits the vehicle information i4 to the central device 3 by the transmission unit 404 (step ST24). . Thereafter, transmission determination section 406 stores in memory section 405 that transmission for setting FAST has been performed (step ST25), and ends the determination process.
On the other hand, when the determination result of step ST23 is negative, the transmission determination unit 406 ends the determination process without causing the central device 3 to transmit the vehicle information i4.

As shown in FIG. 22, when the transmission form is reset transmission, transmission determination section 406 first checks whether or not transmission for resetting FAST has already been performed (step ST31). If transmission for resetting the FAST has already been performed, the transmission determination unit 406 ends the determination process.
On the other hand, if transmission for resetting FAST has not yet been performed, the transmission determination unit 406 determines that it is a transmission timing for resetting FAST, and the transmission unit 404 transmits vehicle information i4 to the central device 3. (Step ST32). After that, the transmission determination unit 406 stores in the storage unit 405 that transmission for resetting FAST has been performed (step ST33), and ends the determination process.

As shown in FIG. 23, when the transmission form is shared transmission, transmission determination section 406 first checks whether transmission for resetting and setting FAST has already been performed (step ST41). When transmission for resetting and setting FAST has already been performed, the transmission determination unit 406 ends the determination process.
On the other hand, when the transmission for resetting and setting the FAST has not been performed, the transmission determination unit 406 determines that the in-vehicle communication device 7 starts from the intersection based on the position information included in the information data wirelessly received by the reception unit 401. The distance to the existing position is calculated (step ST42). Then, the transmission determination unit 406 refers to the transmission determination table, specifies the distance D corresponding to the route stored in the storage unit 405, and the distance calculated in step ST42 is the first distance (D−α). It is determined whether it is in the range from to the second distance (D−β) (step ST43).

When the determination result of step ST43 is affirmative, the transmission determination unit 406 determines that it is a transmission timing for resetting and setting FAST, and transmits the vehicle information i4 to the central device 3 by the transmission unit 404 (step S43). ST44). After that, the transmission determination unit 406 stores in the storage unit 405 that transmission for resetting and setting FAST has been performed (step ST45), and ends the determination process.
On the other hand, when the determination result of step ST43 is negative, the transmission determination unit 406 ends the determination process without causing the central device 3 to transmit the vehicle information i4.

As shown in FIG. 24, when the transmission mode is combined transmission, transmission determination section 406 first checks whether or not transmission for resetting FAST has already been performed (step ST51). If transmission for resetting FAST has already been performed, the process proceeds to step ST54.
On the other hand, if transmission for resetting FAST has not yet been performed, the transmission determination unit 406 determines that it is a transmission timing for resetting FAST, and the transmission unit 404 transmits vehicle information i4 to the central device 3. (Step ST52). Thereafter, transmission determination section 406 stores in memory section 405 that transmission for resetting FAST has been performed (step ST53).

Next, transmission determination section 406 checks whether or not transmission for setting FAST has already been performed (step ST54). If transmission for setting FAST has already been performed, the transmission determination unit 406 ends the determination process.
On the other hand, when transmission for setting FAST has not been performed yet, the transmission determination unit 406 has the vehicle-mounted communication device 7 from the intersection based on the position information included in the information data wirelessly received by the reception unit 401. The distance to the position is calculated (step ST55). Then, the transmission determination unit 406 refers to the transmission determination table, specifies the distance D corresponding to the route stored in the storage unit 405, and the distance calculated in step ST55 is the first distance (D−α). It is determined whether it is within the range from to the second distance (D−β) (step ST56).

At that time, immediately after the vehicle information i4 is transmitted to the central device 3 at the transmission timing at which FAST is reset in step 52, the calculated distance is changed from the first distance (D-α) to the second distance (D-β). ), The determination result in step ST23 is negative, and the transmission determination unit 406 once ends the determination process.
After that, when the in-vehicle communication device 7 moves to the predetermined position described above, when the receiving unit 401 of the roadside wireless communication device 4 wirelessly receives the information data of the in-vehicle communication device 7 again in step ST1 of FIG. 20, the step of FIG. Transmission determination shown in FIG. 24 is performed again through ST3 to step ST11.

  In this redetermination, since transmission for resetting FAST has already been performed as described above, the process proceeds from step ST51 to step ST54 through step ST54 and step ST55, and the transmission determination unit 406 calculates in step ST55. It is determined whether or not the determined distance is within the range from the first distance (D-α) to the second distance (D-β). When the determination result of step ST55 is affirmative, the transmission determination unit 406 determines that it is the transmission timing for setting FAST, and transmits the vehicle information i4 to the central device 3 by the transmission unit 404 (step ST57). ). Thereafter, the transmission determination unit 406 stores in the storage unit 405 that transmission for setting FAST has been performed (step ST58), and ends the determination process.

[Central device command processing]
FIG. 25 is a flowchart showing FAST command processing executed by the central device 3. As shown in FIG. 25, when the vehicle information i4 transmitted by the transmission unit 404 of the roadside wireless communication device 4 is received by the communication unit 301 of the central device 3 (step SS1), the vehicle vehicle type recognized from the vehicle information i4 is It is confirmed whether or not the vehicle is an emergency vehicle (step SS2). If the vehicle type is not an emergency vehicle, the process returns to step SS1.

When it is confirmed in step SS2 that the vehicle type is an emergency vehicle, the control unit 304 refers to the control determination table (see FIG. 19) and sets the transmission form corresponding to the route stored in the storage unit 303. Check. When the transmission form is set transmission (in the case of “Yes” in step SS3), the control unit 304 outputs a command to set FAST to the communication unit 301 (step SS4).
When the transmission mode is reset transmission (“Yes” in step SS5), the control unit 304 outputs a command to reset the FAST to the communication unit 301 (step SS6).
When the transmission mode is shared transmission (in the case of “Yes” in step SS7), the control unit 304 outputs a command to reset the FAST to the communication unit 301 (step SS8), and then issues a command to set the FAST. It outputs to the communication part 301 (step SS9).

If the transmission mode is combined transmission (“No” in step SS7), the control unit 304 first checks whether transmission for resetting FAST has already been performed (step SS10). If transmission for resetting the FAST has already been performed, the transmission determination unit 406 ends the command process.
On the other hand, when transmission for resetting FAST has not yet been performed, the control unit 304 outputs a command to reset the FAST to the communication unit 301 (step SS11). Thereafter, the control unit 304 stores in the storage unit 303 that a command for resetting FAST has been output (step SS12), and once returns to step SS1.

In step SS1, when the communication unit 301 of the central device 3 receives the vehicle information i4 from the roadside wireless communication device 4 again, the process proceeds to step SS10 through step SS2, step SS5, and step SS7. , Whether or not transmission for resetting FAST has already been performed. Here, since transmission for resetting FAST has already been performed as described above, control unit 304 proceeds to step SS13 and outputs a command to set FAST to communication unit 301.
The points that are not described in the third embodiment are the same as in the first embodiment.

  As described above, according to the roadside wireless communication device 4 of this embodiment, it is determined whether or not the transmission timing that the transmission unit 404 transmits to the central device 3 corresponds to the position of the in-vehicle communication device 7, and the determination result is Since the vehicle information i4 is transmitted to the central device 3 when the result is affirmative, the amount of data transmitted to the central device 3 can be reduced (thinned out). Thereby, the transmission processing load of the roadside wireless communication device 4 can be reduced, and the processing load of the central device 3 can be reduced.

In addition, since the number of transmissions from the transmission unit 404 to the central apparatus 3 is set to one, the amount of data transmitted to the central apparatus 3 can be further reduced.
The transmission determination unit 406 also determines whether the vehicle information i4 of the emergency vehicle corresponds to the transmission timing when the vehicle 6 on which the in-vehicle communication device 7 is mounted is an emergency vehicle. The amount of data to be transmitted can be reduced.

Further, since the vehicle information i4 for setting FAST is transmitted when the in-vehicle communication device 7 is present in the vicinity of the predetermined position in the predetermined area, the in-vehicle communication device 7 is in the predetermined area. FAST can be reliably set when it exists.
Moreover, since the installation position of the optical beacon set in advance in the predetermined area can be used as the predetermined position for determining the presence of the in-vehicle communication device 7, the FAST is performed by the roadside wireless communication device 4. The amount of renovation can be reduced.
Further, since the roadside wireless communication device 4 has a wider communication range than the optical beacon, if the emergency vehicle enters the communication range of the roadside wireless communication device 4, the vehicle-mounted communication device 7 passes through the roadside wireless communication device 4. The central device 3 that has received the vehicle information i4 outputs a command to set the FAST to the traffic signal controller 5b on the assumption that the emergency vehicle exists at the installation position of the optical beacon when the vehicle information i4 is received. In such a case, there is a risk that the emergency vehicle will not appropriately turn green when approaching the intersection.
On the other hand, in this embodiment, since the installation position of the optical beacon is a predetermined position for determining the presence of the in-vehicle communication device 7, the central device 3 passes through the optical beacon from the in-vehicle communication device 7 of the emergency vehicle. The FAST command is sent to the vehicle information i4 when the vehicle information i4 is transmitted to the central device 3 from the in-vehicle communication device 7 of the emergency vehicle via the roadside wireless communication device 4. Can be performed appropriately.

In addition, the transmission determination unit 406 determines whether or not the in-vehicle communication device 7 is present within a range from the first distance (D-α) to the second distance (D-β) or within a predetermined coordinate range. Therefore, it can be easily determined whether or not the in-vehicle communication device 7 exists in the predetermined area.
Moreover, since the vehicle information i4 for resetting the FAST is transmitted when the in-vehicle communication device 7 flows into the predetermined area, the FAST is quickly reset when the in-vehicle communication device 7 flows into the predetermined area. Can do.

In addition, since a plurality of transmission timings are set in the predetermined area, the installation cost can be reduced as compared with the case where a plurality of optical beacons are installed in the predetermined area to set the transmission timing.
Further, when the central device 3 receives the vehicle information i4 from the roadside wireless communication device 4 when the in-vehicle communication device 7 flows into the predetermined area, the central device 3 outputs a command for resetting the FAST, so that the FAST is reset more quickly. Can do.

[Modification]
FIG. 26 shows a modification of the control device of the third embodiment, and is a functional block diagram showing the internal configuration of the control device. In the third embodiment, the central device 3 is a control device, but in this modification, a roadside wireless communication device (other device) 14 different from the roadside wireless communication device 4 of the third embodiment also serves as the control device. Yes. The roadside wireless communication device 14 includes a reception unit 401, a determination unit 402, a transmission unit 404, a storage unit 405, and a control unit 407. Since the reception unit 401, the determination unit 402, the transmission unit 404, and the storage unit 405 have the same configuration as that of the roadside wireless communication device 4 according to the first embodiment, description thereof is omitted.

  When the control unit 407 determines that the vehicle 6 is an emergency vehicle based on the vehicle type information included in the vehicle information i4 received by the reception unit 401 from the roadside wireless communication device 4, the vehicle-mounted communication device determined by the determination unit 402 A command for setting FAST and a command for resetting are selectively output based on the route in which 7 exists. Specifically, the control unit 407 refers to the control determination table (see FIG. 19) stored in the storage unit 405, identifies the transmission form corresponding to the route determined by the determination unit 402, and Based on the transmission form, a command to set FAST and a command to reset are selectively output. The command output from the control unit 407 is transmitted from the transmission unit 404 to the traffic signal controller 5b.

  FIG. 27 shows another modification of the roadside wireless communication device 4 and the central device 3 according to the third embodiment. FIG. 27A is a functional block diagram showing the internal configuration of the roadside wireless communication device 4. b) is a functional block diagram showing the internal configuration of the central device 3. In the third embodiment, the roadside wireless communication device 4 performs transmission timing determination processing. In this modification, the central device 3 performs transmission timing determination processing. In the present modification, the roadside radio communication device 4 and the central device 3 constitute a control system.

  As shown in FIG. 27A, the roadside wireless communication device 4 of the present modification includes a reception unit 401, a transmission unit 404, and a storage unit 405 therein. The transmission unit 404 is configured to transmit the information data (including position information that can identify the position of the in-vehicle communication device 7) received wirelessly by the reception unit 401 to the central device 3. The transmission unit 404 may transmit a part of information data (including position information and speed information) wirelessly received by the reception unit 401 to the central device 3.

  As shown in FIG. 27B, the central device 3 of the present modification includes a communication unit 301, a storage unit 303, a control unit 304, and a control determination unit 305 therein. The communication unit 301 receives the information data transmitted by the transmission unit 404 of the roadside wireless communication device 4. Whether or not the control determination unit 305 outputs a command related to FAST, that is, a command to set FAST and a command to reset based on the position of the in-vehicle communication device 7 identified from the information data received by the communication unit 301. Respectively.

The determination as to whether or not it is the timing to output a command for setting FAST is, for example, the information data received by the communication unit 301 as in the determination performed by the transmission determination unit 406 of the roadside wireless communication device 4 of the third embodiment. The distance from the intersection to the position where the in-vehicle communication device 7 exists is calculated based on the position information included in the information, and the calculated distance is a range from the first distance (D-α) to the second distance (D-β). It is determined by whether or not it is within.
In addition, the determination as to whether or not it is the timing to output a command to reset FAST is performed by the in-vehicle communication device 7 in the same manner as the determination performed by the transmission determination unit 406 of the roadside wireless communication device 4 of the third embodiment, for example. Judgment is made based on whether or not it has entered the area.

The control unit 304 of the central device 3 outputs a command for setting FAST to the communication unit 301 when the control determination unit 305 determines that it is time to output a command for setting FAST. In addition, when the control determination unit 305 determines that it is time to output a command to reset FAST, the control unit 304 outputs a command to reset the FAST to the communication unit 301.
When the control unit 304 of the central device 3 determines the timing of outputting the command, the information calculated based on the information data received from the roadside wireless communication device 4 first is obtained from the roadside wireless communication device 4 after a predetermined time has elapsed. It can be reviewed by the received information data. For example, based on the information data received when the in-vehicle communication device 7 is located far from the intersection, the control unit 304 calculates the timing and outputs a command. However, the in-vehicle communication device 7 approaches the vicinity of the intersection. When the timing is shifted, the control unit 304 can output the command again. In this case, since the traffic signal controller 5 side receives the command from the central device 3 twice or more, it is only necessary to distinguish and determine these commands.

As described above, according to the control system of the present modification, the roadside wireless communication device 4 transmits the information data acquired from the in-vehicle communication device 7 to the central device 3, and is identified from the information data on the central device 3 side. Based on the position of the in-vehicle communication device 7, it is possible to easily determine each timing of outputting a command to set and reset FAST.
In the present embodiment, the central device 3 receives information related to the position of the vehicle from the roadside communication device 4 and performs a timing determination process for outputting a command related to FAST. A higher-level device that performs the determination process and a lower-level device that provides the information to the higher-level device are provided. For this reason, in the said low-order apparatus, the modification amount of the said high-order apparatus can be reduced by converting the information regarding the position etc. of a vehicle into the same message | telegram format as the conventional optical beacon.

The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
For example, in the above embodiment, the route is determined using the destination port number or the source IP address, but the route may be determined based on the source port number or the destination IP address. In this case, when using destination IP addresses, the central device 3 only needs to have a plurality of IP addresses corresponding to these destination IP addresses.
In the above embodiment, the route is determined using one of the port number and the IP address, but the route may be determined using both the port number and the IP address.

DESCRIPTION OF SYMBOLS 3 Central apparatus 301 Communication part 302 Processing part 303 Storage part 304 Control part 305 Control determination part 4 Roadside wireless communication device 401 Reception part 402 Determination part 404 Transmission part 405 Storage part 406 Transmission determination part 407 Control part 5 Traffic signal apparatus 5a Traffic signal lamp 5b Traffic signal controller 6 Vehicle 7 Onboard communication device (mobile communication device)
8a communication line 8b communication line 8c communication line 9 roadside router 10 network 11 router 12 roadside router 14 roadside wireless communication device 20 optical beacon 21 optical beacon controller 22 optical beacon head 23 optical communication unit 24 vehicle detection sensor unit 25 transmission unit 26 Reception unit 27 Communication unit C Intersection C 'Intersection C1 to C3 Intersection D Distance i1 Signal control information i2 Execution information i3 Information i4 Vehicle information (mobile information)
L1-L4 Inflow path L5-L8 Outflow path L1'-L4 'Inflow path L5'-L8' Outflow path Pa1-Pa16 port Pb1-Pb16 port R road S1-S8 area (predetermined area)

Claims (12)

A receiver that wirelessly receives information data that is transmitted from the mobile communication device and includes information that can identify the position of the mobile communication device;
A roadside wireless communication device comprising: a transmission unit that transmits to the central device mobile information excluding information that is included in the information data wirelessly received by the reception unit and that can identify the position of the mobile communication device. And
Based on the information data wirelessly received by the receiving unit, a determination unit that determines an area where the mobile communication device that is the transmission source exists,
The transmission unit transmits the mobile body information to the central device using a different communication session established according to the area determined by the determination unit between the roadside wireless communication device and the central device. A roadside radio communicator configured to transmit.   The roadside wireless communication device according to claim 1, wherein the communication session is established based on different ports.   The roadside wireless communication device according to claim 1, wherein the communication session is established based on different IP addresses. The mobile communication device is an in-vehicle communication device mounted on a vehicle,
The roadside wireless communication device according to any one of claims 1 to 3, wherein the moving body information is vehicle information related to the vehicle.   The roadside wireless communication device according to claim 4, wherein the area is a route for each direction of travel of the vehicle.   The transmission unit is configured to delete a part of the plurality of information data when the reception unit wirelessly receives the plurality of information data including the same vehicle ID for each route. The roadside wireless communication device according to claim 5.   The transmission unit is configured to transmit the vehicle information to the central device when a distance from an intersection where the roadside wireless communication device is installed to the vehicle falls within a predetermined range. The roadside wireless communication device according to any one of claims 4 to 6. A transmission determination unit configured to determine whether the transmission unit corresponds to a transmission timing transmitted to the central device based on a position of the in-vehicle communication device identified from the information data wirelessly received by the reception unit; ,
The roadside wireless communication device according to claim 6, wherein the transmission unit is configured to transmit the vehicle information to the central device when a determination result of the transmission determination unit is affirmative. Information included in the information data and capable of identifying the position of the mobile communication device from the roadside wireless communication device that wirelessly received from the mobile communication device information data including information that can identify the position of the mobile communication device A central device that receives mobile body information excluding and performs at least one of traffic information collection, traffic management and traffic control based on the mobile body information,
Different communication established between the roadside wireless communication device and the central device according to the area where the mobile communication device is present and connected to the roadside wireless communication device through one communication line A communication unit that receives the mobile information using a session;
And a processing unit that determines an area in which the mobile communication device that is a transmission source of the mobile body information exists based on the communication session.   The central apparatus according to claim 9, wherein the communication unit is configured to be able to receive the moving body information transmitted by an optical beacon. Against information data including information capable of identifying the location of the mobile communication device from the wireless reception and roadside communication equipment central unit, the position can identify the information of the included in the information data and the mobile communication device A communication method for transmitting mobile information excluding :
A determination step of determining an area in which the mobile communication device that is the transmission source exists based on information data that the roadside wireless communication device wirelessly receives from the mobile communication device;
The mobile unit from the roadside radio communication device to the central device using a different communication session established between the roadside radio communication device and the central device according to the area determined in the determination step. A sending step for sending information;
And a determination step of determining an area in which the mobile communication device that is the transmission source of the mobile body information is present based on the communication session used for transmission to the central device. Against information data including information capable of identifying the location of the mobile communication device from the wireless reception and roadside communication equipment central unit, the position can identify the information of the included in the information data and the mobile communication device A computer program for causing a computer to execute processing for transmitting mobile object information excluding ,
Based on the information data wirelessly received from the mobile communication device, a determination step of determining an area where the mobile communication device that is the transmission source exists;
A transmission step of transmitting the mobile body information to the central device using a different communication session established between the roadside wireless communication device and the central device according to the area determined in the determination step. computer programs, including, and.

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