JPH07160992A - Traffic information system, and central processing unit and on-vehicle equipment in the system - Google Patents

Abstract

PURPOSE:To calculate the time required for each block of a road accurately and to provide the calculated time to a passenger of each vehicle. CONSTITUTION:Upon the receipt of a signal from any of on-road equipments 11a-11f, a moving body 12 generates uniquely a prescribed ID number and sends the ID information to the on-road equipment together with time information. A central processing unit 14 specifies a travelling block and a travelling time of the moving body 12 based on the content of the ID information, information specifying an on-road equipment relaying the ID information and the time when the ID information is received. A traffic information processing section 19 of the central processing unit 14 gives each travelling time of each block to each moving body via the on-road equipments 11a-11f.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic information system for providing a moving body such as a vehicle running on a road with traffic information such as traffic congestion, regulations, required time and the like.

[0002]

2. Description of the Related Art FIG. 30 is a system configuration diagram showing a travel time measuring system which is an example of a conventional traffic information system disclosed in Japanese Patent Laid-Open No. 40594/1992. In the figure, 1 is a road, 2 is a vehicle speed sensor provided for each predetermined section, 3 is a transmission device for transmitting speed data, 4
Is a travel time calculation device that predicts the time (travel time) required to pass each section using speed data, and 5 is a travel time providing device that provides the estimated required time of each display section to the occupants of each vehicle. . In the travel time providing device 5, 6 is a travel time editing device that calculates a predicted value of the required time of each display section, and 7 is a travel time display device that is provided at each main point on the road and that displays the predicted required time of the display section. Is. 2
A section between two travel time display devices 7 is a display section.

Next, the operation will be described. Vehicle speed sensor 2
Detects the speed of a passing vehicle and transmits speed data to the travel time calculation device 4 via the transmission device 3. The travel time calculation device 4 predicts the travel time of the section from the speed data and the length of the section corresponding to the speed data. This process is executed for each section. The estimated travel time of each section is supplied to the travel time editing device 6. The travel time editing device 6 calculates the predicted travel time of each display section using the predicted travel time of each section. Then, each travel time display device 7 displays the estimated travel time of the self-display section. The occupant of the vehicle traveling in each display section can recognize the estimated travel time displayed and recognize the time required to pass through the section.

FIG. 31 is a system configuration diagram showing a road information system which is an example of a conventional traffic information system disclosed in Japanese Patent Laid-Open No. 64-61899. In the figure, 1
n and 1m are vehicles passing through the sections n and m, 2n and 2m are vehicle identification devices installed in the sections n and m, 8 is a registered vehicle file in which information about vehicles registered in advance is stored, and 9 is a vehicle It is a vehicle position discriminating device for discriminating a position. 3n and 3m indicate license plate information.

Next, the operation will be described. The vehicle identification device 2n recognizes the license plate of the vehicle passing through the section n. Then, the license plate information 3n is sent to the vehicle position determination device 9. In addition, the vehicle identification device 2m is a section m
Recognize the license plate of the vehicle passing through. Then, the license plate information 3m is sent to the vehicle position determination device 9. Information indicating installation positions of the vehicle identification devices 2n and 2m and vehicle passage time information are added to the license plate information 3n and 3m.

The registered vehicle file 8 stores information indicating the license plate of the registered vehicle. The vehicle position determination device 9 matches the information in the registered vehicle file 8 with the transmitted license plate information. Then, when the information matching the license plate information is present in the registered vehicle file 8, the passing position and the passing time of the registered vehicle are used by using the installation position information and the passing time information accompanying the license plate information. Create an operation journal that includes information such as Using this operation journal, it is possible to know the actual travel time of the registered vehicle in the specific section.

By calculating the actual travel time of the registered vehicle for each section, the actual travel time of all the sections can be calculated. Therefore,
If the travel time display device 7 as shown in FIG. 30 is present, the occupant of the vehicle traveling in each display section needs to see the predicted travel time displayed to pass the section. Can recognize time.

[0008]

Since the conventional traffic information system is configured as described above, in the system shown in FIG. 30, the travel time calculated is a predicted value. In order to improve the accuracy of the predicted value, it is necessary to shorten the section length and install many detection devices such as vehicle speed sensors. It takes a lot of money to install many detection devices, and there is a problem that the amount of information increases and the load of the travel time providing device 5 increases.

In the system shown in FIG. 31, the calculated travel time is the actual travel time, but an image processing device for identifying the license plate of the vehicle is required in the vehicle identification devices 2n, 2m. The system becomes complicated and expensive. Therefore, there is a problem that it is inappropriate to apply such a system to a traffic information system.

In order to make the image processing device unnecessary, a system in which a unique identification number (ID number) is given to each vehicle and each vehicle notifies the vehicle identification devices 2n and 2m of the ID number is also conceivable. However, I
Assigning a D number and centrally managing such an ID number is difficult to realize. Further, monitoring such an ID number may lead to monitoring the moving destination or traveling speed of an individual, which may invade privacy.

The present invention has been made to solve the above-mentioned problems, and it is possible to calculate an accurate travel time for each mobile unit without managing a unique ID number or installing an image processing apparatus. The purpose of the present invention is to obtain a traffic information system that can be provided to passengers of the vehicle, a central processing unit and an in-vehicle device in this traffic information system.

[0012]

According to a first aspect of the present invention, there is provided a traffic information system, which is installed on a road, transmits a plurality of traffic information, and receives a signal from each mobile body traveling on the road. And a vehicle-mounted device that is mounted on a mobile body and receives a signal from the roadside device to present traffic information to an occupant, and a central processing unit that supplies traffic information to the roadside device. An ID information generation unit that generates ID information that identifies the own device, and a transmission unit that transmits the ID information to a roadside device corresponding to a communication area in which a mobile body equipped with this vehicle-mounted device is passing, The central processing unit uses, from the received ID information, a receiving unit that receives the ID information from the vehicle-mounted device via the roadside device, and a travel section and a travel time of a mobile body that mounts the vehicle-mounted device that has transmitted the ID information. Have identification means to identify Configuration is intended.

A traffic information system according to a second aspect of the present invention is the system according to the first aspect, wherein the ID of the vehicle-mounted device is
When the information generating means passes through one roadside machine, the identification code of the roadside machine that has passed immediately before and its reception time are taken out from the storage means and information including them is generated as temporary ID information, The specifying means of the central processing unit is configured to specify the travel section and the travel time from the detection result of the on-road machine detecting means, the ID information received from the on-road machine and the time when the ID information is received.

A traffic information system according to a third aspect of the present invention is the system according to the first aspect, wherein the ID of the vehicle-mounted device is
The information generating means includes the identification code of the on-road machine received for the first time after the traveling of the mobile body and the reception time of the identification code.
D information is generated, and the identifying means of the central processing unit travels from the time when the ID information redundantly stored in the storage means, the information indicating the on-road machine corresponding to the ID information, and the ID information are received. It is configured to specify a section and travel time.

A traffic information system according to a fourth aspect of the present invention is the system according to the first aspect, wherein the vehicle ID
The information generating means generates a random number and generates ID information including the random number and the random number generation time, and the specifying means of the central processing unit
ID information redundantly stored in the storage means, information indicating a roadside machine corresponding to the ID information, and their I
The travel section and the travel time are specified from the time when the D information is received.

A traffic information system according to a fifth aspect of the present invention is the system according to the first aspect, wherein the ID of the vehicle-mounted device is
When the information generating means passes through the one roadside machine, the identification code of the roadside machine that has passed immediately before and the passing time thereof are taken out from the storage means, and the identification code of the one roadway machine and the passing time and immediately before that are passed. Information including the identification code of the roadside machine and its passing time is generated as temporary ID information, and the specifying means of the central processing unit specifies the travel section and the travel time from each ID information received from one roadside machine. It has a configuration to do.

A traffic information system according to a sixth aspect of the present invention is the system according to the first aspect, wherein the ID of the vehicle-mounted device is
When the information generating means passes through the one roadside machine, the identification code of the roadside machine that has passed immediately before is taken out from the storage means, and the identification code of the roadside machine that has passed immediately before and the one roadside machine The information including the timer time required for passing between the two is generated as temporary ID information, and the specifying means of the central processing unit detects the detection result of the on-road unit detecting means,
The configuration is such that the travel section and the travel time are specified from the ID information received from the roadside machine.

According to a seventh aspect of the present invention, in the traffic information system according to the first aspect, the ID of the vehicle-mounted device is provided.
When the information generating means passes through the one roadside machine, the identification code of the roadside machine that has just passed is retrieved from the storage means, and the identification code received from the one roadside machine and the identification received from the roadside machine that passed Information including a code and a timer time required for passing between the road machine and the one road machine is generated as temporary ID information, and the specifying means of the central processing unit receives from the one road machine. The travel section and the travel time are specified from the ID information.

In the traffic information system according to the eighth aspect of the present invention, the central processing unit further has a processing means for including the travel section and travel time specified by the specifying means in the traffic information.

A traffic information system according to a ninth aspect of the present invention is the traffic information system according to the third or fourth aspect, in which the central processing unit further includes processing means for transmitting time information in addition to the traffic information. When the ID information generating means of the vehicle-mounted device receives the time information from the central processing unit via the on-road device, the ID information generating means generates the ID information using the time information.

A central processing unit in a traffic information system according to a tenth aspect of the present invention is installed on a road, transmits a plurality of traffic information, and receives a signal from each mobile body traveling on the road. A device in a traffic information system including a vehicle-mounted device that is mounted on a mobile body, receives a signal from a roadside device, presents traffic information to an occupant, and generates ID information and transmits the ID information to the roadside device. A receiving means for receiving the ID information from the vehicle-mounted device via the roadside device, and a specifying means for specifying the travel section and the travel time of the mobile body equipped with the vehicle-mounted device which has sent the ID information from the received ID information. It has a structure having.

The central processing unit in the traffic information system according to the eleventh aspect of the present invention further comprises processing means for including the travel section and travel time specified by the specifying means in the traffic information.

The on-vehicle device in the traffic information system according to the twelfth aspect of the present invention is installed on the road, transmits a traffic information and receives a signal from each mobile body traveling on the road, and A traffic information system including a central processing unit that specifies a travel section and a travel time of the mobile unit based on the ID information from the mobile unit and supplies traffic information including the travel section and the travel time to a road machine. In this configuration, the ID information generating means for generating the ID information for identifying the own machine and the transmitting means for transmitting the ID information to the on-road machine passing therethrough are provided.

A vehicle-mounted device in a traffic information system according to a thirteenth aspect of the present invention is the vehicle-mounted device according to the twelfth aspect, wherein when the ID information generating means passes through one road-side device, the road-side device that has passed immediately before that. The identification code of the machine and the reception time thereof are taken out from the storage means and the information including them is generated as temporary ID information.

The vehicle-mounted device in the traffic information system according to the invention of claim 14 is the vehicle-mounted device according to claim 12, wherein the ID information generating means receives the identification code of the roadside device which is received for the first time after the traveling of the moving body and its identification code. The configuration is such that ID information including the reception time of the identification code is generated.

According to a fifteenth aspect of the present invention, there is provided the vehicle-mounted device of the traffic information system according to the twelfth aspect, wherein the ID information generating means generates a random number and generates ID information including the random number and the random-number generation time. It has a configuration to do.

The on-vehicle device in the traffic information system according to the sixteenth aspect of the present invention is the vehicle-mounted device according to the twelfth aspect, wherein when the ID information generating means passes through one roadside device, it passes immediately before from the storage means. The identification code of the on-road machine and its passing time are taken out, and information including the identification code of the one on-road machine and its passing time and the identification code of the on-road machine that passed immediately before and its passing time is generated as temporary ID information. It has a configuration to do.

The on-vehicle device in the traffic information system according to the seventeenth aspect of the present invention is the vehicle-mounted device according to the twelfth aspect, wherein when the ID information generating means passes through one on-road device, it passes immediately before from the storage means. The temporary ID information that includes the identification code of the on-road unit that has passed and the identification code of the on-road unit that has passed immediately before and the time required to pass between the on-road unit and one of the on-road units. The configuration is generated as.

The on-vehicle device in the traffic information system according to the eighteenth aspect of the present invention is the on-vehicle device according to the twelfth aspect, wherein the ID information generating means immediately before the storage means when the ID information generating means passes through one roadside equipment. In addition to extracting the identification code of the on-road machine that passed through, the identification code received from the one on-road machine, the identification code received from the on-road machine that passed immediately before, and the passage between the on-road machine and the one on-road machine. The configuration is such that information including the required timer time is generated as temporary ID information.

[0030]

The vehicle-mounted device according to the invention of claim 1 does not have a unique ID number, and an ID number is generated based on a specific condition such as reception of an identification code from a road device or a predetermined time and the like. To the central processing unit via the machine. The central processing unit identifies the travel section and travel time of the mobile unit from the transmitted ID number.

Each time the vehicle-mounted device according to the second aspect of the present invention passes through the roadside device, the vehicle-mounted device sends out the identification code of the roadside device that has just passed and the reception time thereof as an ID number. This ID number is updated every time the vehicle passes each road machine. The central processing unit can obtain the information indicating the travel section of the mobile unit and the information indicating the time when the mobile unit passed the starting point of the section by receiving the ID number via the on-road machine.

When the vehicle-mounted device according to the third aspect of the present invention receives the identification code from the roadside device for the first time, the identification code and the reception time thereof are used as the ID number. This ID number is not updated even if the vehicle passes a road machine thereafter. The in-vehicle device sends out its ID number each time it passes the road device. When the central processing unit receives the ID number via the roadside machine, the central processing unit can specify the travel section by specifying each roadside machine that has transmitted the ID number.

In the vehicle-mounted device according to the fourth aspect of the present invention, for example, a random number is generated when the engine of the moving body is started, and the random number and the time at that time are used as the ID number. This ID number is not updated even if the vehicle passes a road machine thereafter. The in-vehicle device sends out its ID number each time it passes the road device. When the central processing unit receives the ID number via the roadside machine, the central processing unit can specify the travel section by specifying each roadside machine that has transmitted the ID number.

In the on-vehicle device according to the fifth aspect of the present invention, each time the vehicle passes through the roadside device, the identification code of the roadside device that has just passed and the reception time thereof, and the identification code of the roadway device that has just passed and the current time. And are sent as ID numbers. This ID
The number is updated as it passes each on-road unit. The central processing unit receives the ID number via the on-road machine, and thereby the information indicating the travel section of the moving body, the information indicating the time when the moving body passes the starting point of the section, and the end point of the section are set to the moving body. It is possible to obtain information indicating the time when the vehicle passed.

Each time the on-vehicle machine according to the invention of claim 6 passes through the road machine, the on-board machine passes the identification code of the road machine that has just passed and the required time between the road machine and the road machine that has just passed. It is sent as an ID number. This ID number is updated every time the vehicle passes each road machine. The central processing unit can obtain the information indicating the travel time of the moving body and the information indicating the starting point of the section by receiving the ID number via the on-road device.

In the on-vehicle machine according to the seventh aspect of the invention, each time the vehicle passes the road machine, the identification code of the road machine that has just passed, the identification code of the road machine that has just passed, the road machine and the road that has just passed. The required time to and from the machine is sent as an ID number. This ID number is updated every time the vehicle passes each road machine. The central processing unit can obtain the information indicating the travel time of the moving body, the information indicating the starting point of the section, and the information indicating the ending point of the section by receiving the ID number via the roadside machine.

According to the eighth aspect of the present invention, the central processing unit provides each moving body with travel time in each travel section specified by the specifying means as traffic information.

The processing means in the invention according to claim 9 is
The time in the central processing unit is supplied to the vehicle-mounted device of each mobile body, and each vehicle-mounted device unifies the standard of time included in the ID information.

According to the tenth aspect of the invention, the specifying means accurately specifies the travel section and the travel time even in the state where a unique ID number is not assigned to each moving body.

According to the eleventh aspect of the present invention, the processing means provides each moving body with travel time in each travel section specified by the specifying means as traffic information.

According to a twelfth aspect of the present invention, the ID information generating means generates an ID number based on a specific condition such as reception of an identification code from a roadside machine or a predetermined time, and centrally processes the ID number via the roadside machine. Provide to the device. Therefore, the central processing unit can specify the travel section and travel time of the mobile unit from the transmitted ID number.

The ID information generating means according to the thirteenth aspect of the present invention sends out the identification code of the immediately preceding roadside machine and the reception time thereof as an ID number every time the vehicle passes through the roadside machine. This ID number is updated every time the vehicle passes each road machine. Therefore, the central processing unit can obtain the information indicating the travel section of the mobile unit and the information indicating the time when the mobile unit passed the starting point of the section by receiving the ID number via the on-road device.

The ID information generating means in the invention of claim 14 uses the identification code and the reception time thereof as the ID number when the identification code is received from the on-road machine for the first time.
This ID number is not updated even if the vehicle passes a road machine thereafter. Also, each time the vehicle passes the road machine, its ID number is transmitted. Therefore, when the central processing unit receives the ID number via the roadside machine, the central processing unit can specify the travel section by specifying each roadside machine that has transmitted the ID number.

The ID information generating means in the fifteenth aspect of the present invention generates a random number, for example, when the engine of the moving body is started, and uses the random number and the time at that time as the ID number. This ID number is not updated even if the vehicle passes a road machine thereafter. Also, each time the vehicle passes the road machine, its ID number is transmitted. Therefore, when the central processing unit receives the ID number via the roadside machine, the central processing unit can specify the travel section by specifying each roadside machine that has transmitted the ID number.

According to the sixteenth aspect of the present invention, the ID information generating means, each time when the vehicle passes the road machine, the identification code of the road machine that has just passed and the reception time thereof, the identification code of the road machine that has just passed, and the current time. The time and ID are transmitted as an ID number. This ID number is updated every time the vehicle passes each road machine. Therefore, the central processing unit receives the ID number via the on-road machine to determine the information indicating the travel section of the moving body, the information indicating the time when the moving body passed the starting point of the section, and the end point of the section. It is possible to obtain information indicating the time when the moving body has passed.

According to the seventeenth aspect of the present invention, the ID information generating means, each time the road machine is passed, the identification code of the road machine that has just passed and the required time between the road machine and the road machine that has just passed. And are sent as ID numbers. This ID number is updated every time the vehicle passes each road machine. Therefore, the central processing unit can obtain the information indicating the travel time of the moving body and the information indicating the starting point of the section by receiving the ID number via the on-road device.

Then, I in the invention of claim 18
Each time the D information generating means passes through the roadside machine, the identification code of the roadside machine that has just passed and the identification code of the roadway machine that has just passed, and the time required between the roadway machine and the roadway machine that has just passed. Is sent as an ID number. This ID number is updated every time the vehicle passes each road machine. Therefore, the central processing unit can obtain the information indicating the travel time of the moving body, the information indicating the starting point of the section, and the information indicating the ending point of the section by receiving the ID number via the on-road device. .

[0048]

【Example】

Example 1. FIG. 1 is a system configuration diagram showing the configuration of a traffic information system according to an embodiment of the present invention. In the figure, 11a to 11f are roadside communication devices such as beacons (hereinafter referred to as roadside devices) installed on the road, 12 is a mobile body equipped with an in-vehicle traffic information processing device (hereinafter referred to as in-vehicle device), 14 Is a central processing unit installed in a traffic control center or the like, and 13a to 13f are transmission lines for transmitting signals between the roadside machines 11a to 11f and the central processing unit 14. 15
Reference symbols a to 15f indicate communication areas of the roadside machines 11a to 11f, respectively. The transmission lines 13a to 13f may be wired or wireless. Further, although one moving body 12 is shown in FIG. 1 for the sake of simplicity, a large number of moving bodies actually exist.

In the central processing unit 14, 20 is a roadside machine identifying section (reception means, roadside machine detection means) for accommodating each of the transmission lines 13a to 13f and specifying the destination of the received signal, and 16 is the content of the received signal. Signal identifying section (identifying means) for identifying, 1
Reference numeral 7 is a calculation unit (specification unit) for calculating the travel section and travel time, 18 is a storage unit (storage unit) for storing calculation results, and 19 is a traffic information processing unit (processing for collecting and providing traffic information). Means).

FIG. 2 is a block diagram showing the configuration of the vehicle-mounted device 60. In the figure, 21 is a receiving unit that receives a signal from a roadside device via an antenna 35, 22 is a signal demodulating unit that demodulates a received signal received by the receiving unit 21, 23 is a signal processing unit, and 24 is a signal processing unit. A modulation unit (transmission unit) that performs modulation processing on the signal from 23, a transmission unit (transmission unit) 24 that converts the modulated wave from the modulation unit 24 into a radio frequency wave and outputs the radio frequency wave, and 33 is a signal processing unit 23. The display device 34 performs a display based on the display output of, and a keyboard 34 for an occupant of the moving body to select various traffic information.

In the signal processing unit 23, 26 is an input interface for inputting the demodulation output from the signal demodulation unit 22,
Reference numeral 27 is an output interface for outputting a signal to the modulator 24, 28 is a display controller for outputting a display to the display 33, 29 is a keyboard interface for inputting a signal from the keyboard 34, and 30 is a CPU (ID information generating means). ), 31 is a storage unit in which various information is stored, and 32 is a clock for measuring time. This embodiment corresponds to the invention described in claims 2 and 13.

Next, the operation will be described with reference to the flowcharts of FIGS. 3 and 4 and the sequence diagram of FIG. 3 is a flowchart showing the operation of the vehicle-mounted device, and FIG. 4 is a flowchart showing the operation of the central processing unit 14.

Each of the on-road machines 11a to 11f transmits an identification code indicating its own machine. The vehicle-mounted device of the moving body 12 includes the communication area 1 of the moving body 12 of each of the roadside machines 11a to 11f.
When entering 5a to 15f, the identification code is received from the roadside device in charge of the communication area (step ST11).
For example, when the mobile body 12 enters the communication area 15a of the on-road device 11a, the receiving unit 21 of the vehicle-mounted device receives the identification code from the on-road device 11a. Specifically, the signal received by the receiver 21 is a modulated signal. Therefore, the signal demodulation unit 22 demodulates the received signal and supplies the identification code obtained as a result of the demodulation to the signal processing unit 23.

In the signal processing section 23, the CPU 30
An identification signal is obtained via the input interface 26, and it is detected from which on-road machine the identification signal is a signal (step ST12). Here, it is detected that the signal is from the roadside machine 11a. This signal is identified by the identification code "1.
1a ". The CPU 30 inputs the current time from the clock 32 and stores the current time (referred to as “T1”) together with the identification code [11a] in the storage unit 31 (step ST13). Then, the CPU 30 searches the storage unit 31 and confirms whether there is another identification code received before the reception of the identification code "11a" (step ST1).
4). If not, the process returns to step ST11. The above processing corresponds to the sequence of SQ11 in FIG. In addition, each of the roadside machines 11a to 11f corresponds to the central processing unit 1
When the traffic information (A) is received from No. 4, it is transmitted together with the identification code. The traffic information (A) will be described in detail later.

The mobile unit 12 has the communication area 15 of the on-road unit 11b.
When entering b, the receiving unit 21 of the vehicle-mounted device is
The modulated wave by the identification code is received from (step ST1
1). The signal demodulation unit 22 demodulates the received signal and supplies the demodulated identification signal to the signal processing unit 23. CPU3
0 obtains the identification signal via the input interface 26 and detects from which on-road machine the identification signal is (step ST12). Here, the identification code "11b" from the roadside machine 11a is detected. The CPU 30
The current time is input from the clock 32, and the current time (denoted as "T2") is stored in the storage unit 31 together with the identification code [11b] (step ST13).

The CPU 30 searches the storage unit 31 and confirms whether or not there is another identification code received before the identification code "11b" is received (step ST14). At this point, the storage unit 31 stores the identification code “11a”. When such an identification code is stored, the CPU 30 reads another identification code, that is, the previously received identification code [11a] and its reception time “T1” from the storage unit 31 (step ST15). Then, the code “11aT1” is given to the modulator 24. The modulator 24
The information is modulated and a modulated wave is output. The transmitter 25 converts the modulated wave into a radio frequency signal and transmits the radio frequency band modulated wave via the antenna 35 (step ST16).

When the transmission is completed, the CPU 30 erases "11a" and "T1" in the storage unit 31. The in-vehicle device is
The above process is repeated. Therefore, every time the mobile body 12 enters the communication area of a new road device, step ST15,
The process of ST16 is executed. Here, the transmitted code (for example, “11aT1”) is different when the mobile unit 12 passes the next road vehicle, so the temporary ID
Can be called a number.

Each of the roadside machines 11a to 11f receives a signal from its own communication area 15a to 15f. Since the mobile unit 12 is currently in the communication area 15b, the on-road unit 11b receives a signal from the transmitting unit 25 of the vehicle-mounted unit mounted on the mobile unit 12. The roadside machine 11b demodulates the received signal and transmits the code "11aT1" to the roadside machine identifying unit 20 of the central processing unit 14 via the transmission path 13b. The roadside machine identification unit 20 receives the code from each of the roadside machines 11a to 11f (step ST21). After receiving the code, by confirming from which transmission line the signal was received,
The roadside machine that transmitted the code is specified (step ST2).
2). Here, the roadside machine 11b is specified.

The signal identifying section 16 identifies the content of the received code. Here, the signal identifying unit 16 recognizes the code “11aT1” (step ST23). Therefore, by the on-road device identifying unit 20 and the signal identifying unit 16,
It is recognized that the code “11aT1” is transmitted from the roadside device 11b. That is, it is recognized that the moving body 12 detected by the roadside machine 11a at time T1 is currently detected by the roadside machine 11b. The calculation unit 17 identifies the travel section [11a to 11b] of the moving body 12 from the recognition result. Further, the travel time [t2-T1] is calculated using the current time t2 in the central processing unit 14 (step ST24). The above processing corresponds to the sequence of SQ12 in FIG.

Further, the traffic information processing unit 19 of the central processing unit 14 statistically processes the travel time of each of a plurality of moving bodies that have passed through the travel section to determine a definite travel time of the travel section. . As the statistical processing, for example, there is a method of averaging the travel time of each moving body that has passed through the section in a predetermined time (for example, 5 to 10 minutes) past from the present time. There is also a method of averaging the travel times of the latest predetermined vehicles (for example, 10 vehicles) among the moving bodies that have passed through the travel section. When performing the averaging process, extremely short time and long time may be discarded as compared with the others.

The traffic information processing section 19 uses the travel section [11a
~ 11b], the above processing is performed for all travel sections. As a result, the travel time is determined for all travel sections. Each determined travel time is output from the traffic information processing unit 19 as traffic information. The traffic information is, for example, supplied to each of the road vehicles 11a to 11f, and is supplied from each of the road vehicles 11a to 11f to each mobile body. Alternatively, it is provided to each mobile body by radio waves or radio waves for television. The traffic information includes not only travel time information but also information indicating an accident section and a construction section, information for guiding a parking lot in the travel section, and other guidance information. Further, a section having a long travel time, that is, a traffic jam section is extracted, and traffic jam information indicating them is also included in the traffic information.

When receiving the traffic information (A) from the central processing unit 14, for example, as shown in FIG. 5, each of the roadside machines 11a to 11f receives the traffic information (A) from the communication areas 15a to 1 of its own.
Send to 5f. In the vehicle-mounted device mounted on the moving body 12, the signal demodulating unit 22 includes the antenna 35 and the receiving unit 21.
The traffic information is demodulated and output from the signal received via. C
The PU 30 receives the traffic information via the input interface 26, stores the traffic information in the storage unit 31, and delivers it to the display control unit 28. The display control unit 28 displays the traffic information on the display device 33.

FIG. 6 shows an example of travel time information in characters displayed on the display 33. FIG. 7 shows the display 33
An example in which each travel time is displayed on the map displayed in FIG. FIG. 8 shows an example of the display unit of the display 33 and the keyboard 34. For example, when the occupant presses the "congestion" key on the keyboard 34, C
The PU 30 takes out information about traffic congestion from the traffic information in the storage unit 31 and passes it to the display control unit 28. The display control unit 28 displays information regarding traffic congestion.

Example 2. In the first embodiment, the moving body 12
It is necessary to perform management such that each time the vehicle enters the communication area 15a to 15f of each of the roadside machines 11a to 1f, the previous roadside machine identification code and the current time at the time of reception are transmitted and updated. However, the mobile unit 12 may transmit fixed data. However, as already described, assigning a fixed ID number to the mobile unit 12 causes a problem. Therefore, in this embodiment, a system is shown in which the mobile unit 12 can transmit fixed data without assigning a fixed ID number to the mobile unit 12.

The configuration of the system according to this embodiment is shown in FIG.
It is similar to the system configuration shown in. However, the operations of the signal identifying unit 16, the arithmetic unit 17, and the traffic information processing unit 19 in the central processing unit 14 are different from those in the first embodiment. Further, the configuration of the vehicle-mounted device is the same as the configuration shown in FIG. 2, although the processing of the CPU 30 is different. It should be noted that this embodiment corresponds to the invention described in claims 3 and 14.

Next, the operation will be described with reference to the flowcharts of FIGS. 9 and 10 and the sequence diagram of FIG. 9 is a flowchart showing the operation of the vehicle-mounted device, and FIG. 10 is a flowchart showing the operation of the central processing unit 14.

Each of the roadside machines 11a to 11f transmits an identification code indicating its own machine. In addition, each road machine 11
When the traffic information (A) is received from the central processing unit 14, the a to 11f transmit it together with the identification code. As for the vehicle-mounted device of the moving body 12, the moving body 12 is
When entering the communication areas 15a to 15f of a to 11f, the identification code is received from the roadside machine in charge of the communication area (step ST11). For example, the moving body 12 is the road device 1
When entering the communication area 15b of 1b, the receiving unit 2 of the vehicle-mounted device
1 receives the identification code from the roadside machine 11b. The signal demodulation unit 22 demodulates the received signal and supplies the identification code obtained as a result of the demodulation to the signal processing unit 23.

In the signal processing unit 23, the CPU 30
It is determined whether the identification code is received for the first time after the mobile body 12 starts traveling. In particular,
After the engine of the mobile unit 12 is started and the CPU 30 starts operating, it is confirmed whether or not it is the first reception (step ST
31). Here, it is assumed that the identification code “11b” is the first received code. The CPU 30 detects from which on-road machine the identification signal is (step ST).
32). Here, it is detected that the signal is from the roadside machine 11b.

The CPU 30 inputs the current time from the clock 32, and the current time ("T2" together with the identification code [11b].
And ) Is stored in the storage unit 31 (step ST3).
3). Thereafter, this code “11bT2” is the I of the moving body 12.
Treated as a D number.

The CPU 30 reads the ID number “11bT2” from the storage unit 31 and gives the code to the modulation unit 24. The modulator 24 performs a modulation process on the information and outputs a modulated wave. The transmitter 25 converts the modulated wave into a radio frequency signal, and converts the radio frequency band modulated wave into the antenna 3
5 through step 5 (step ST34). The processing so far corresponds to the sequence of SQ21 in FIG. It should be noted that, thereafter, the CPU 30 stores the ID number “11” from the storage unit 31 every time it enters the communication area of a new roadside machine.
bT2 ”is read out and its code is given to the modulator 24. In addition, the ID number “11bT2” in the storage unit 31 is
It is erased when the engine of the moving body 12 is stopped.

Each of the roadside machines 11a to 11f receives a signal from its own communication area 15a to 15f. Since the mobile unit 12 is currently in the communication area 15b, the on-road unit 11b receives a signal from the transmitting unit 25 of the vehicle-mounted unit mounted on the mobile unit 12. The roadside machine 11b demodulates the received signal and transmits the ID number "11bT2" to the roadside machine identifying unit 20 of the central processing unit 14 via the transmission path 13b. The roadside machine identification unit 20 receives the codes from the respective roadside machines 11a to 11f. When the code is received, the roadside machine that transmitted the code is specified. Here, the roadside machine 11b is specified.

The signal identifying section 16 detects the content of the received code. Here, the signal identification unit 16
The number "11bT2" is detected (step ST4
1). As shown in FIG. 12, the calculation unit 17 includes a storage unit 18
The ID number “11
bT2 ”is stored. At this time, the current time "t2" in the central processing unit 14 is also stored (step ST
42). Then, it is confirmed whether or not there is the same ID number in the storage unit 18 (step ST43). At this point,
The ID number “11bT” stored in the past in the storage unit 18
2 ”does not exist. Therefore, the process returns to step ST41.
The processing so far corresponds to the sequence of SQ22 in FIG.

When the mobile unit 12 enters the communication area of another roadside machine, for example, the communication area 15c of the roadside machine 11c,
The CPU 30 of the vehicle-mounted device stores the ID number “11” from the storage unit 31.
bT2 ”is read out and its code is given to the modulator 24. Therefore, the ID number “11bT2” is the roadside device 11c.
After being received by the central processing unit 1 via the transmission line 13c.
4 is transmitted.

In the central processing unit 14, the roadside machine identifying section 20 identifies the roadside machine which has transmitted the ID number. Here, the roadside machine 11c is specified. The signal identifying unit 16 detects the content of the received ID number. The signal identification unit 16 detects the ID number “11bT2” (step ST41). As illustrated in FIG. 12, the calculation unit 17 stores the ID number “11bT2” in the area corresponding to the on-road machine 11c in the storage unit 18. At this time, the current time "t3" in the central processing unit 14 is also stored (step ST42). Then, it is confirmed whether or not there is the same ID number in the storage unit 18 (step ST43).

In some cases, the arithmetic unit 17 takes out the most recently stored one. In this case, "1
Since the ID number "11bT2" is stored in the column "1b", "11bT2, t2" is retrieved. Computing unit 1
7 calculates the travel time [t3-t2] using the time t2 and the current time t3 in the retrieved information (step ST44). Further, it can be recognized from the extracted information that the moving body 12 has passed the on-road machine 11b at time T2. Therefore, the travel section [11b to 11c] can be specified (step ST45). The above processing corresponds to the sequence of SQ23 in FIG.

Further, the traffic information processing unit 19 statistically processes the travel time of each of the plurality of moving bodies that have passed through the travel section to determine the definitive travel time of the travel section. The traffic information processing unit 19 uses the travel section [11b-11
The above processing is performed for all travel sections as well as c]. As a result, the travel time is determined for all travel sections. Each determined travel time is output from the traffic information processing unit 19 as traffic information. The traffic information is supplied to, for example, the road machines 11a to 11f, and the road machines 11a to 11f are supplied with the traffic information.
It is supplied to each moving body from a to 11f. Alternatively, it is provided to each mobile body by radio waves or radio waves for television.

Each of the roadside machines 11a to 11f is shown in FIG.
As shown in FIG. 5, when the traffic information (A) is received from the central processing unit 14, the traffic information (A) is transmitted to the communication area 15 a of the own device.
15f. The vehicle-mounted device of each mobile body obtains traffic information and presents it to the occupants, as in the case of the first embodiment.

In the storage unit 12 of the central processing unit 14, each information is erased after a fixed time (for example, 24 hours) has passed. Alternatively, when each column is full, the information to be newly stored is overwritten with the oldest information. Further, in FIG. 11, the sequence of SQ24 shows the sequence when the moving body 12 further travels and enters the communication area 15d of the roadside machine 11d.

Further, the traffic information processing section 19 includes the storage section 12
It is also possible to grasp the travel route of the moving body by using each information in the above. In the example shown in FIG. 11, the ID number “11bT2”
The moving body 12 which sends out the travel route [11b-11c-1
1d] is tracked. In the example shown in FIG. 12, I
It can be seen that the moving body 12 sending out the D number "11bT5" has followed the travel route [11a-11b-11c]. The traffic information processing unit 19 can, for example, total the number of moving bodies that have followed a predetermined route during a predetermined time, and recognize the congestion route from the total value. Further, it is possible to predict occurrence or elimination of traffic congestion on a route reaching a certain direction from a change in the number of moving bodies that have followed a predetermined route during a predetermined time. The recognition result and the prediction result are included in the traffic information and supplied to each mobile body.

Example 3. In the above embodiment, each roadside machine 11
Each of a to 11f has transmitted an identification code. However, it is possible to obtain the same effect as in the above embodiment without transmitting the identification code. The system according to this embodiment is
A random number generated by the vehicle-mounted device of the mobile unit 12 is used as the ID number. The system configuration according to this embodiment is similar to the system configuration shown in FIG. However, the operations of the signal identifying unit 16, the arithmetic unit 17, and the traffic information processing unit 19 in the central processing unit 14 are different from those in the first embodiment.
Further, the configuration of the vehicle-mounted device is the same as the configuration shown in FIG. 2, although the processing of the CPU 30 is different. This embodiment corresponds to the invention described in claims 4 and 15.

Next, the operation will be described with reference to the flowcharts of FIGS. 10 and 13 and the sequence diagram of FIG. FIG. 13 is a flowchart showing the operation of the vehicle-mounted device. The operation of the central processing unit 14 is similar to that shown in the flowchart of FIG.

In the vehicle-mounted device of the mobile unit 12, the CPU 30
Generates a random number "N" when first receiving a signal from any of the road units. At that time, the time “T” is read from the clock 32. Then, the code “N, T” is stored in the storage unit 31 (steps ST51, ST52). CP
The U30 may perform this processing when the engine of the moving body 12 is started. Thereafter, this code “N, T” is used for the moving body 12
It is treated as an ID number.

The CPU 30 reads the ID number "N, T" from the storage unit 31 and gives the code to the modulation unit 24 (step ST53). Here, the ID number “N,
It is assumed that "T" is "N1". The modulator 24 performs a modulation process on the information and outputs a modulated wave. Transmitter 25
Converts the modulated wave into a radio frequency signal, and transmits the radio frequency band modulated wave via the antenna 35. The processing so far corresponds to the sequence of SQ31 in FIG. It should be noted that the CPU 30 thereafter stores the ID number “N” from the storage unit 31 each time it enters a communication area of a new on-road unit.
1 ”is read out and the code is given to the modulator 24. The ID number “N1” in the storage unit 31 is erased when the engine of the moving body 12 is stopped.

As shown in FIG. 1, the moving body 12 is currently
Since the vehicle is in the communication area 15b,
It receives a signal from the transmission unit 25 of the vehicle-mounted device mounted in. The roadside machine 11b demodulates the received signal and transmits the ID number "N1" to the roadside machine identifying unit 20 of the central processing unit 14 via the transmission path 13b. The roadside machine identification unit 20 receives the codes from the respective roadside machines 11a to 11f. When the code is received, the roadside machine that transmitted the code is specified. Here, the roadside machine 11b is specified.

The signal identifying section 16 detects the content of the received code. Here, the signal identification unit 16
The number "N1" is detected (step ST41). As illustrated in FIG. 12, the calculation unit 17 stores the ID number “N1” in the area of the storage unit 18 corresponding to the on-road unit 11b. At this time, the current time "t" in the central processing unit 14
2 ”is also stored together (step ST42). And
It is confirmed whether or not there is the same ID number in the storage unit 18 (step ST43). At this point, the storage unit 18 does not have the previously stored ID number “N1”.
Therefore, the process returns to step ST41. The processing up to here is
This corresponds to the sequence of SQ32 in FIG.

The moving body 12 is in the communication area 15 of the roadside machine 11c.
When entering c, the CPU 30 of the vehicle-mounted device reads the ID number “N1” from the storage unit 31 and gives the code to the modulation unit 24. Therefore, the ID number "N1" is transmitted to the central processing unit 14 via the transmission line 13c after being received by the on-road unit 11c.

In the central processing unit 14, the roadside machine identifying section 20 identifies the roadside machine which has transmitted the ID number. Here, the roadside machine 11c is specified. The signal identifying unit 16 detects the content of the received ID number. The signal identification unit 16 detects the ID number “N1” (step ST
41). As shown in FIG. 15, the calculation unit 17 includes a storage unit 1
In the area corresponding to the on-road machine 11c in No. 8, the ID number "N
1 ”is stored. At this time, the current time "t3" in the central processing unit 14 is also stored (step ST4).
2). Then, it is confirmed whether or not there is the same ID number in the storage unit 18 (step ST43).

In some cases, the arithmetic unit 17 takes out the most recently stored one. In this case, "1
Since the ID number "N1" is stored in the column "1b",
“N1, t2” is taken out. The calculation unit 17 calculates the travel time [t3-t2] using the time t2 in the extracted information and the current time t3 (step ST44).
In addition, based on the retrieved information, the moving body 12 is
It can be recognized that the vehicle has passed the on-road machine 11b. Therefore, the travel section [11b to 11c] can be specified (step ST45). The above processing is performed by SQ33 in FIG.
Corresponding to the sequence.

Further, the traffic information processing section 19 statistically processes the travel time of each of the plurality of moving bodies that have passed through the travel section to determine the definitive travel time of the travel section. The traffic information processing unit 19 uses the travel section [11b-11
The above processing is performed for all travel sections as well as c]. As a result, the travel time is determined for all travel sections. Each determined travel time is output from the traffic information processing unit 19 as traffic information.

The traffic information is, for example, each roadside machine 11a-1.
1f, and is supplied to each moving body from each of the roadside machines 11a to 11f. Alternatively, it is provided to each mobile body by radio waves or radio waves for television. Each roadside machine 11a
11f receives traffic information (A) from the central processing unit 14 as shown in FIG. 14, for example, the traffic information (A).
Is transmitted to its own communication areas 15a to 15f. The vehicle-mounted device of each mobile body obtains traffic information and presents it to the occupants, as in the case of the first embodiment.

As in the case of the second embodiment, in the storage unit 12 of the central processing unit 14, each information is erased after a certain time (for example, 24 hours). Alternatively, when each column is full, the information to be newly stored is overwritten with the oldest information. Further, in FIG. 14, the sequence of SQ34 shows the sequence when the moving body 12 further travels and enters the communication area 15d of the roadside machine 11d.

As in the case of the second embodiment, the traffic information processing unit 19 can also grasp the travel route of the moving body by using each information in the storage unit 12. In the example shown in FIG.
The moving body 12 that sends out the ID number "N1" makes the travel route [1
1b to 11c to 11d]. Figure 15
In the example shown in, the mobile unit 12 that sends out the ID number “N3”
It can be seen that has followed the travel route [11c-11d-11f].

Example 4. In the second and third embodiments,
The mobile unit 12 sends only the ID number. Therefore, the central processing unit 14 needs to specify the roadside machine that the mobile body 12 is passing through, that is, the roadside machine that has received the ID number from the mobile body 12 and transmitted it in order to specify the travel section. . Further, in the first embodiment, the moving body 12 sends out the roadside machine identification number, which is the roadside machine at the starting point of the travel section, not the roadside machine which the moving body 12 is currently passing through. . Therefore, again, the central processing unit 14
In order to specify the travel section, it is necessary to specify the on-road machine through which the moving body 12 is passing.

The system according to the present embodiment eliminates the need for the central processing unit to identify the road vehicle that the mobile unit 12 is currently passing through, and allows the travel section to be identified directly from the signal from the mobile unit 12. FIG. 16 is a system configuration diagram showing the configuration of the traffic information system according to the fourth embodiment. In the central processing unit 14B, 40 is each roadside machine 11
The signals from a to 11f are received, and the signals are identified by the signal identifying unit 16
It is a receiving unit (receiving means) for supplying to. The other components are the same as those shown in FIG. The configuration of the vehicle-mounted device is the same as that shown in FIG. 2, although the processing of the CPU 30 is different. It should be noted that this embodiment has the features of claims 5 and 16.
It corresponds to the described invention.

Next, the operation will be described with reference to the flowcharts of FIGS. 17 and 18 and the sequence diagram of FIG. 17 is a flowchart showing the operation of the vehicle-mounted device, and FIG. 18 is a flowchart showing the operation of the central processing unit 14B.

Each of the roadside machines 11a to 11f transmits an identification code indicating its own. The vehicle-mounted device of the moving body 12 includes the communication area 1 of the moving body 12 of each of the roadside machines 11a to 11f.
When entering 5a to 15f, the identification code is received from the roadside device in charge of the communication area (step ST61).
For example, when the mobile body 12 enters the communication area 15a of the on-road device 11a, the receiving unit 21 of the vehicle-mounted device receives the identification code from the on-road device 11a.

In the signal processing section 23, the CPU 30
An identification signal is obtained via the input interface 26, and it is detected from which on-road machine the identification signal is (step ST62). Here, it is detected that the signal is from the roadside machine 11a. The CPU 30 has a clock 32.
The current time is input from, and the current time (referred to as "t1") is stored in the storage unit 31 together with the identification code [11a] (step ST63). Then, the CPU 30 searches the storage unit 31 and confirms whether or not there is another identification code received before the identification code "11a" is received (step ST64). If not, the process returns to step ST61.
The above processing corresponds to the sequence of SQ41 in FIG. In addition, when each of the roadside machines 11a to 11f receives the traffic information (A) from the central processing unit 14,
Send it with the identification code.

The moving body 12 is in the communication area 15 of the roadside machine 11b.
When entering b, the receiving unit 21 of the in-vehicle communication device is
The modulated wave by the identification code is received from 1b (step S
T61). The signal demodulator 22 demodulates the received signal,
The demodulated identification signal is supplied to the signal processing unit 23. CP
The U30 obtains the identification signal via the input interface 26 and detects from which road machine the identification signal is a signal (step ST62). Here, the road machine 11
The identification code "11b" from a is detected. CPU30
Inputs the current time from the clock 32, and the identification code [11
The current time (referred to as “t2”) together with “b” is stored in the storage unit 3.
1 (step ST63).

The CPU 30 searches the storage unit 31 and confirms whether or not there is another identification code received before the identification code "11b" is received (step ST64). At this point, the storage unit 31 stores the identification code “11a”. When such an identification code is stored, the CPU 30 reads another identification code, that is, the previously received identification code [11a] and its reception time “t1” from the storage unit 31 (step ST65). Then, control is performed to output the code "11at1, 11bt2" to which the identification code "11b" just received and the current time "t2" are added. (Step ST66). When the transmission is completed, C
The PU 30 erases the previously received identification code “11a” and reception time “t1” in the storage unit 31. The vehicle-mounted device repeats the above processing. Therefore, every time the mobile unit 12 enters a new roadside communication area, step ST6
5, the process of ST66 is executed. Here, the transmitted code (for example, “11at1, 11bt2”) is different when the mobile unit 12 passes the next road vehicle, and can be said to be a temporary ID number.

Each of the roadside machines 11a to 11f receives a signal from its own communication area 15a to 15f. Since the mobile unit 12 is currently in the communication area 15b, the on-road unit 11b receives a signal from the transmitting unit 25 of the vehicle-mounted unit mounted on the mobile unit 12. The roadside machine 11b demodulates the received signal and outputs the code "11at1, 11bt2" to the transmission path 13
It is transmitted to the receiving unit 40 of the central processing unit 14 via b.
When the receiving section 40 detects the code from each of the roadside machines 11a to 11f, it passes the code to the signal identifying section 17 (step ST71). The signal identifying unit 17 separates the code into the on-road unit identification code (11a, 11b) and the time (t1, t1) (step ST72). Then, the information is passed to the calculation unit 17.

The arithmetic unit 17 specifies the travel section [11a-11b] of the moving body 12 from the passed information and calculates the travel time [t2-t1] (step ST).
73). The above processing corresponds to the sequence of SQ42 in FIG.

Further, the traffic information processing unit 19 of the central processing unit 14 statistically processes the travel time of each of a plurality of moving bodies passing through the travel section to determine a definite travel time of the travel section. . The traffic information processing unit 19 performs the above process not only on the travel sections [11a to 11b] but also on all the travel sections. As a result, the travel time is determined for all travel sections. Each determined travel time is output from the traffic information processing unit 19 as traffic information. The traffic information is supplied to each mobile body in the same manner as in the above embodiments.

In FIG. 19, the sequence of SQ43 shows the sequence when the moving body 12 further travels and enters the communication area 15c of the roadside machine 11c.

Example 5. In each of the above embodiments, the moving body 12
The signal sent by the vehicle to the road machines 11a to 11b contained information about the time. However, the mobile unit 12 may perform the calculation related to the time and may not send the information related to the time to the roadside machines 11a to 11b. This example
It is based on such an idea.

FIG. 20 is a system configuration diagram showing the configuration of the system according to this embodiment. As compared with the system shown in FIG. 1, it can be seen that the arithmetic unit 17 does not exist in the central processing unit 14C. Further, the configuration of the in-vehicle device is shown in FIG.
As shown in FIG. 1, a timer 50 is provided in the signal processing unit 23C instead of the clock 32. This embodiment corresponds to the invention described in claims 6 and 17.

Next, the operation will be described with reference to the flow charts of FIGS. 22 and 23 and the sequence diagram of FIG. 22 is a flowchart showing the operation of the vehicle-mounted device, and FIG. 23 is a flowchart showing the operation of the central processing unit 14.

Each of the on-road units 11a to 11f transmits an identification code indicating its own. In addition, each road machine 11
When the traffic information (A) is received from the central processing unit 14, the a to 11f transmit it together with the identification code.

When the mobile body 12 enters the communication areas 15a to 15f of the roadside machines 11a to 11f, the vehicle-mounted device of the mobile body 12 receives the identification code from the roadside machine in charge of the communication area (step ST81). . For example, when the mobile body 12 enters the communication area 15a of the on-road device 11a, the receiving unit 21 of the vehicle-mounted device receives the identification code from the on-road device 11a. The signal demodulation unit 22 demodulates the received signal and supplies the identification code obtained as a result of the demodulation to the signal processing unit 23C.

In the signal processor 23C, the CPU 30
Detects which road unit the identification signal is from (step ST82). Here, it is detected that the signal is from the roadside machine 11a. The CPU 30 stores the identification code “11a” in the storage unit 31 (step ST83). Then, the CPU 30 searches the storage unit 31 and confirms whether or not there is another identification code received before the reception of the identification code "11a" (step ST8).
4). If there is no other identification code, after starting the timer 50 (step ST85), the process returns to step ST81. The above processing corresponds to the sequence of SQ51 in FIG.

The moving body 12 is in the communication area 15 of the roadside machine 11b.
When entering b, the receiving unit 21 of the in-vehicle communication device is
The modulated wave by the identification code is received from 1b (step S
T81). The signal demodulator 22 demodulates the received signal,
The demodulated identification signal is supplied to the signal processing unit 23C. C
PU 30 detects from which road unit the identification signal is a signal (step ST82). Here, the identification code "11b" from the roadside machine 11a is detected. CPU
The storage unit 30 stores the identification code “11b” in the storage unit 31 (step ST83), searches the storage unit 31, and confirms whether there is another identification code received before the reception of the identification code “11b”. Yes (step ST84).

At this time, the storage unit 31 stores the identification code "11a". When such an identification code is stored, the CPU 30 reads the already stored identification code, that is, the identification code “11a” (step ST85). Further, the current time value of the timer 50 is read (step ST86). This time value corresponds to the travel time of the travel section [11a-11b].
This time value is T2. Then, the CPU 30 controls to transmit the code [11aT2] (step ST
87). The modulator 24 modulates the code [11aT2], and the transmitter 25 transmits the modulated wave via the antenna 35 to the roadside machine 11b.
Send to.

The CPU 30 executes the following processing for
The timer value of the timer 50 is cleared and the timer 50
Is restarted, and the identification code “11a” in the storage unit 31 is erased. The vehicle-mounted device repeats the above processing. Therefore,
Every time the moving body 12 enters the communication area of a new road vehicle, the processes of steps ST86 to ST88 are executed.
The code to be transmitted here (for example, "11aT2")
Can be said to be a temporary ID number, because it becomes different when the mobile unit 12 passes through the next road vehicle.

Each of the roadside machines 11a to 11f receives a signal from its own communication area 15a to 15f. Since the mobile unit 12 is currently in the communication area 15b, the on-road unit 11b receives a signal from the transmitting unit 25 of the vehicle-mounted unit mounted on the mobile unit 12. The roadside machine 11b demodulates the received signal and transmits the code "11aT2" to the roadside machine identifying unit 20 of the central processing unit 14C via the transmission path 13b. The roadside machine identification unit 20 receives the code from each of the roadside machines 11a to 11f (step ST91). When the code is received, by confirming from which transmission path the signal is received, the roadside machine that transmitted the code is specified (step S).
T92). Here, the roadside machine 11b is specified.

The signal identifying section 16 identifies the content of the received code. Here, the signal identifying unit 16 recognizes the code [11aT2] (step ST93). Therefore, by the on-road device identifying unit 20 and the signal identifying unit 16,
It is recognized that the code [11aT2] is transmitted from the roadside machine 11b. That is, it is recognized that the moving body 12 detected by the roadside machine 11a is currently detected by the roadside machine 11b and the travel time is T2. The recognition results are stored in the storage unit 18. The above processing corresponds to the sequence of SQ52 in FIG.

The traffic information processing section 19 of the central processing unit 14C
Statistically processes each travel time of a plurality of moving bodies that have passed through the travel section to determine a definitive travel time of the travel section. The traffic information processing unit 19 uses the travel section [1
1a to 11b], the above process is performed for all travel sections. As a result, the travel time is determined for all travel sections. Each determined travel time is output from the traffic information processing unit 19 as traffic information. In addition,
In FIG. 24, the sequence of SQ53 is the moving body 12
Shows a sequence when the vehicle further travels and enters the communication area 15c of the roadside machine 11c.

As described above, according to this embodiment, the travel time calculation processing in the central processing unit 14C becomes unnecessary.

Example 6. In the above embodiment, the mobile unit 12 sends the road unit identification number, which is the road unit at the starting point of the travel section, and not the road unit which the mobile unit 12 is currently passing. Therefore, the central processing unit 14C
In order to specify the travel section, it is necessary to specify the on-road machine through which the moving body 12 is passing.

The system according to the present embodiment eliminates the need for the central processing unit to specify the road vehicle that the moving body 12 is currently passing through, and can specify the travel section directly from the signal from the moving body 12. FIG. 25 is a configuration diagram showing the configuration of the traffic information system according to the sixth embodiment. In the central processing unit 14D, 40 is each of the roadside machines 11a to 11f.
It is a receiving unit that receives the signal from and supplies it to the signal identifying unit 16. The other components are the same as those shown in FIG. The configuration of the vehicle-mounted device is the same as that shown in FIG. 21, although the processing of the CPU 30 is different. This embodiment corresponds to the invention described in claims 7 and 18.

Next, the operation will be described with reference to the flowcharts of FIGS. 26 and 27 and the sequence diagram of FIG. 28. FIG. 26 is a flowchart showing the operation of the vehicle-mounted device, and FIG. 27 is a flowchart showing the operation of the central processing unit 14D. The vehicle-mounted device of the moving body 12 is the fifth
As in the case of the above embodiment, steps ST81 to ST87
The process of is executed. And here, the CPU of the in-vehicle device
When transmitting the time count value T2 of the timer 50, the control unit 30 controls to transmit the identification code [11b] that has already been stored in the storage unit 31 and the identification code [11b] that has just been received (step ST100). ). Therefore, the modulator 2
4 modulates the code [11a11bT2], and the transmitter 25 transmits the modulated wave to the roadside machine 11b via the antenna 35. The above processing corresponds to the sequence of SQ61 in FIG. Here, the code to be transmitted (for example, "1
1a11bT2 ″) is different when the moving body 12 passes the next road machine, and can be said to be a temporary ID number.

The roadside machine 11b demodulates the received signal,
The code “11a11bT2” is transmitted to the receiving unit 40 of the central processing unit 14D via the transmission path 13b. Receiver 40
Demodulates the received signal, and codes "11a11bT2"
Is supplied to the signal identifying unit 16 (step ST101).

By the signal identifying section 16, the code [11a1
1bT2] is recognized (step ST102). That is, the moving body 12 detected by the road vehicle 11a is
Currently, the travel section is detected by the roadside machine 11b and
1a-11b] is recognized. It is also recognized that the travel time was T2 (step ST1).
03). The recognition results are stored in the storage unit 18. The above processing corresponds to the sequence of SQ62 in FIG.

The traffic information processing section 19 of the central processing unit 14D
Statistically processes each travel time of a plurality of moving bodies that have passed through the travel section to determine a definitive travel time of the travel section. The traffic information processing unit 19 uses the travel section [1
1a to 11b], the above process is performed for all travel sections. As a result, the travel time is determined for all travel sections. Each determined travel time is output from the traffic information processing unit 19 as traffic information. In addition,
In FIG. 28, the sequence of SQ63 is the moving body 12
Shows a sequence when the vehicle further travels and enters the communication area 15c of the roadside machine 11c.

As described above, according to this embodiment, the travel time calculation processing in the central processing unit 14D becomes unnecessary, and the roadside machine identification processing becomes unnecessary.

Example 7. In the second and third embodiments, the mobile unit 12 sets the ID number including the time. In that case, the clock 32 in the in-vehicle device of each mobile body
If the times of the two do not match, a situation may occur in which a plurality of mobile bodies have the same ID number even though they pass through a road machine at different times. It is expected that this situation is likely to occur when there is a large amount of traffic and many moving bodies pass through one road machine within a short time. In order to avoid such a situation, it is desirable that the times of the clocks 32 in the vehicle-mounted devices of the respective mobile units be the same.

Therefore, for example, as shown in FIG.
The traffic information processing unit 19 of the central processing unit 14 supplies the time Ta recognized by the central processing unit 14 to each of the roadside machines 11a to 11f together with the traffic information (A). Its time T
a is transmitted to each of the communication areas 15a to 15f together with the on-road unit identification code and the traffic information (A). The CPU 30 of the vehicle-mounted device that has received the time Ta calibrates the time of the clock 32 at the time Ta. Alternatively, the CPU 30 uses the time Ta instead of the time of the clock 32 (T2 in FIG. 29) as the time in the ID number.

As described above, the time can be shared by all the mobile units in the system. Therefore, the possibility that a plurality of mobile bodies have the same ID number is greatly reduced. This embodiment corresponds to the invention described in claim 9.

[0127]

As described above, according to the first aspect of the invention, the traffic information system has the ID information generating means for generating the ID information for identifying the own vehicle, and the ID information for the on-vehicle apparatus. The in-vehicle device having a transmitting means for transmitting to the roadside device corresponding to the communication area in which the moving body is passing, and the travel section and the travel time of the moving body in which the in-vehicle device that has sent the ID information is received, the received ID information Since it is configured to include a central processing unit having a specifying unit for specifying, the travel section of each mobile unit can be specified and the actual travel time can be measured without assigning a unique ID number to each mobile unit. There is an effect that you can get what you can.

According to the second aspect of the present invention, the traffic information system, when the mobile body passes through one of the roadside devices, provides information including the identification code of the roadside device that has passed immediately before and the reception time thereof. Since the information is transmitted as ID information, the central processing unit does not have to assign a unique ID number to each mobile unit, but the information indicating the travel section of the mobile unit and the time when the mobile unit passed the starting point of the section. It is possible to obtain information that indicates that the travel section and travel time of each mobile body can be accurately specified.

According to the third aspect of the present invention, the traffic information system generates the ID information including the identification code of the on-road unit which is received for the first time by the vehicle-mounted device after the traveling of the moving body and the reception time of the identification code, Since the ID information is sent out each time the mobile body passes through the roadside machine, the central processing unit identifies each roadside machine and travels without assigning a unique ID number to each mobile body. There is an effect that a section can be specified, and a travel section and travel time of each mobile body can be accurately specified.

According to the fourth aspect of the present invention, the traffic information system generates the ID information including the random number generated by the vehicle-mounted device and the random number and the time when the random number is generated, and the ID is generated every time the mobile body passes through the road device. Since the information is transmitted, the central processing unit can identify the travel section by identifying each roadside machine without assigning a unique ID number to each mobile body. And there is an effect that what can accurately specify the travel time is obtained.

According to the fifth aspect of the present invention, the traffic information system uses the identification code of the one roadside machine and the identification code of the immediately preceding roadside machine when the mobile body passes through the one roadside machine. Since the information including the passing time is transmitted as the ID information, the information indicating the travel section of the mobile unit by the central processing unit, even if the unique ID number is not assigned to each mobile unit, It is possible to obtain the information indicating the time when the moving body passes the starting point of the moving body and the information indicating the time when the moving body passes the end point of the section, and it is possible to obtain information that can accurately specify the traveling section and the traveling time of each moving body. It is effective.

According to the sixth aspect of the present invention, in the traffic information system, when the mobile body passes through one road unit, the identification code of the road unit that has passed immediately before and the road unit and the one road unit are identified. Since the information including the time measured by the timer required to pass between the mobile units is transmitted as the ID information, the central processing unit does not need to assign a unique ID number to each mobile unit. It is possible to obtain the information indicating the travel time and the information indicating the starting point of the section, and it is possible to obtain the information that can accurately specify the travel section and the travel time of each mobile body.

According to the invention described in claim 7, when the moving body passes through one road unit, the traffic information system recognizes the identification code received from the one road unit and the identification code received from the road unit passed through. Since the information including the code and the timer time required for passing between the on-road unit and one on-road unit is transmitted as ID information, a unique ID number is assigned to each mobile unit. Even without the central processing unit, the information indicating the travel time of the moving body, the information indicating the starting point of the section and the information indicating the ending point of the section can be obtained, and the traveling section and the travel time of each moving body can be accurately calculated. There is an effect that can be specified.

According to the eighth aspect of the present invention, in the traffic information system, the central processing unit further has a processing means for including the travel section and the travel time specified by the specifying means in the traffic information. There is an effect that the actual travel time of each travel section is provided to each mobile body.

According to the ninth aspect of the present invention, the traffic information system uses the time information when the vehicle-mounted device receives the time information from the central processing unit via the roadside device.
Since the configuration is such that the D information is generated, the time can be shared by all the mobile units in the system, and the possibility that a plurality of mobile units have the same ID number is greatly reduced is obtained. is there.

According to the tenth aspect of the present invention, the central processing unit in the traffic information system receives the travel section and travel time of the vehicle equipped with the vehicle-mounted device that has generated the ID information and sent the ID information. Since it has a specifying means for specifying from information, it is possible to specify the travel section of each mobile body and measure the actual travel time even if a unique ID number is not assigned to each mobile body. There is an effect that you can get what you can.

According to the eleventh aspect of the present invention, the central processing unit in the traffic information system has a processing means for including the travel section and travel time specified by the specifying means in the traffic information. There is an effect that the actual travel time of the travel section is provided to each mobile body.

According to the twelfth aspect of the invention, the vehicle-mounted device in the traffic information system transmits the ID information generating means for generating the ID information for identifying itself and the on-road device passing therethrough. Therefore, even if a unique ID number is not assigned to each mobile unit, the travel section of each mobile unit is specified and the actual travel time is measured. There is an effect that the actual travel time of the travel section is provided to each mobile body.

According to the thirteenth aspect of the present invention, the on-vehicle device in the traffic information system provides the identification code of the on-road device that has passed immediately before and the reception time when the moving object has passed one on-road device. Since the information including the information is transmitted as ID information, even if each mobile unit is not assigned a unique ID number, the information indicating the travel segment of the mobile unit and the segment There is an effect that it is possible to provide information indicating the time when the mobile body passes the starting point, and the central processing unit can accurately specify the travel section and travel time of each mobile body.

According to the fourteenth aspect of the present invention, the vehicle-mounted device in the traffic information system generates the ID information including the identification code of the on-road device received for the first time after the start of traveling of the moving body and the reception time of the identification code, Since the ID information is sent out every time the moving body passes the on-road equipment,
Even if each mobile unit is not assigned a unique ID number, there is an effect that the central processing unit can accurately specify the travel section and travel time of each mobile unit.

According to the fifteenth aspect of the present invention, the vehicle-mounted device in the traffic information system generates a random number and generates ID information including the random number and the random-number generation time, and the ID is generated every time the mobile body passes the roadside device. Since the information is transmitted, there is a device in which the central processing unit can accurately specify the travel section and travel time of each mobile unit even when a unique ID number is not assigned to each mobile unit. There is an effect to be obtained.

According to the sixteenth aspect of the present invention, the on-vehicle device in the traffic information system passes the identification code of the one road device and the passing time and immediately before when the moving object passes the one road device. Since the information including the on-road machine identification code and the passage time thereof is transmitted as ID information, even if each mobile unit is not assigned a unique ID number, the mobile unit moves to the central processing unit. The central processing unit can provide information indicating the travel section of the body, information indicating the time when the mobile body passed the starting point of the section, and information indicating the time when the mobile body passed the end point of the section, and the central processing unit travels each mobile body. There is an effect that a section and travel time can be accurately specified.

According to the seventeenth aspect of the present invention, the on-vehicle device in the traffic information system, when the mobile body passes through one of the roadside devices, identifies the roadside device that has just passed through and the one on the roadside device. Since the information including the timer counting time required for passing to and from the roadside machine is transmitted as the ID information, even if a unique ID number is not assigned to each mobile body, The central processing unit can be provided with information indicating the travel section of the moving body, information indicating the time when the moving body passed the starting point of the section, and information indicating the time when the moving body passed the end point of the section. There is an effect that a travel section and travel time of each moving body can be accurately specified.

According to the eighteenth aspect, the vehicle-mounted device in the traffic information system is configured such that, when the mobile body passes through one road unit, the identification code received from the one road unit and the road unit that has just passed therethrough. Since the ID code includes the received identification code and information including the timer time required to pass between the on-road unit and one on-road unit, an ID number unique to each mobile unit. Even if is not assigned, the central processing unit can provide the information indicating the travel time of the mobile unit, the information indicating the starting point of the section, and the information indicating the end point of the section, and the central processing unit There is an effect that a travel segment and travel time can be accurately specified.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a configuration of a traffic information system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an in-vehicle device.

FIG. 3 is a flowchart showing an operation of the vehicle-mounted device in the first embodiment.

FIG. 4 is a flowchart showing the operation of the central processing unit in the first embodiment.

FIG. 5 is a sequence diagram showing a processing procedure of the traffic information system according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a display example of travel time.

FIG. 7 is an explanatory diagram showing another display example of travel time.

FIG. 8 is an explanatory diagram showing an example of a display of travel time and a keyboard.

FIG. 9 is a flowchart showing an operation of the vehicle-mounted device in the second embodiment.

FIG. 10 is a flowchart showing the operation of the central processing unit in the second embodiment.

FIG. 11 is a sequence diagram showing a processing procedure of the traffic information system according to the second embodiment of the present invention.

FIG. 12 is an explanatory diagram showing an example of a data structure of a storage unit in the central processing unit.

FIG. 13 is a flowchart showing an operation of the vehicle-mounted device in the third embodiment.

FIG. 14 is a sequence diagram showing a processing procedure of the traffic information system according to the third embodiment of the present invention.

FIG. 15 is an explanatory diagram showing an example of a data structure of a storage unit in the central processing unit.

FIG. 16 is a system configuration diagram showing a configuration of a traffic information system according to another embodiment of the present invention.

FIG. 17 is a flowchart showing an operation of the vehicle-mounted device in the fourth embodiment.

FIG. 18 is a flowchart showing an operation of the central processing unit in the fourth embodiment.

FIG. 19 is a sequence diagram showing a processing procedure of the traffic information system according to the fourth embodiment of the present invention.

FIG. 20 is a system configuration diagram showing a configuration of a traffic information system according to still another embodiment of the present invention.

FIG. 21 is a block diagram showing another configuration of the vehicle-mounted device.

FIG. 22 is a flowchart showing an operation of the vehicle-mounted device in the fifth embodiment.

FIG. 23 is a flowchart showing the operation of the central processing unit in the fifth embodiment.

FIG. 24 is a sequence diagram showing a processing procedure of the traffic information system according to the fifth embodiment of the present invention.

FIG. 25 is a system configuration diagram showing a configuration of a traffic information system according to still another embodiment of the present invention.

FIG. 26 is a flowchart showing the operation of the vehicle-mounted device in the sixth embodiment.

FIG. 27 is a flowchart showing the operation of the central processing unit in the sixth embodiment.

FIG. 28 is a sequence diagram showing a processing procedure of the traffic information system according to the sixth embodiment of the present invention.

FIG. 29 is a sequence diagram showing a processing procedure of a traffic information system according to a seventh embodiment of the present invention.

FIG. 30 is a system configuration diagram showing a configuration of a conventional traffic information system.

FIG. 31 is a system configuration diagram showing the configuration of another conventional traffic information system.

[Explanation of symbols]

 11a-11f Roadside machine 14,14B, 14C, 14D Central processing unit 16 Signal identification part (specification means) 17 Calculation part (specification means) 18 Storage part (storage means) 19 Traffic information processing part (processing means) 20 Roadside machine identification Unit (reception unit, roadside device detection unit) 24 modulation unit (transmission unit) 25 transmission unit (transmission unit) 30 CPU (ID information generation unit) 31 storage unit 32 clock 40 reception unit (reception unit) 50 timer 60 vehicle-mounted device

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 10, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction content]

The mobile unit 12 has the communication area 15 of the on-road unit 11b.
When entering b, the receiving unit 21 of the vehicle-mounted device is
The modulated wave by the identification code is received from (step ST1
1). The signal demodulation unit 22 demodulates the received signal and supplies the demodulated identification signal to the signal processing unit 23. CPU3
0 obtains the identification signal via the input interface 26 and detects from which on-road machine the identification signal is (step ST12). Here, the identification code from the road device 11 b "11b" is detected. The CPU 30
The current time is input from the clock 32, and the current time (denoted as "T2") is stored in the storage unit 31 together with the identification code [11b] (step ST13).

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0093

[Correction method] Change

[Correction content]

Example 4. In the second and third embodiments,
The mobile unit 12 sends only the ID number. Therefore, the central processing unit 14 needs to specify the roadside machine that the mobile body 12 is passing through, that is, the roadside machine that has received the ID number from the mobile body 12 and transmitted it in order to specify the travel section. . In addition, in the first embodiment, the mobile unit 12 sends out the road unit identification number, but it is the road unit at the starting point of the travel section, and not the road unit that the mobile unit 12 is currently passing through. Therefore, again, the central processing unit 14 needs to specify the road machine through which the moving body 12 is passing in order to specify the travel section.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0098

[Correction method] Change

[Correction content]

The moving body 12 is in the communication area 15 of the roadside machine 11b.
When entering b, the receiving unit 21 of the in-vehicle communication device is
The modulated wave by the identification code is received from 1b (step S
T61). The signal demodulator 22 demodulates the received signal,
The demodulated identification signal is supplied to the signal processing unit 23. CP
The U30 obtains the identification signal via the input interface 26 and detects from which road machine the identification signal is a signal (step ST62). Here, the road machine 11
The identification code "11b" from b is detected. CPU30
Inputs the current time from the clock 32, and the identification code [11
The current time (referred to as “t2”) together with “b” is stored in the storage unit 3.
1 (step ST63).

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0110

[Correction method] Change

[Correction content]

The moving body 12 is in the communication area 15 of the roadside machine 11b.
When entering b, the receiving unit 21 of the in-vehicle communication device is
The modulated wave by the identification code is received from 1b (step S
T81). The signal demodulator 22 demodulates the received signal,
The demodulated identification signal is supplied to the signal processing unit 23C. C
PU 30 detects from which road unit the identification signal is a signal (step ST82). Here, the identification code from the road device 11 b "11b" is detected. CPU
The storage unit 30 stores the identification code “11b” in the storage unit 31 (step ST83), searches the storage unit 31, and confirms whether there is another identification code received before the reception of the identification code “11b”. Yes (step ST84).

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0117

[Correction method] Change

[Correction content]

Example 6. In the above embodiment, the mobile unit 12 sends out the road unit identification number, but it is for the road unit at the starting point of the travel section, not for the road unit which the mobile unit 12 is currently passing. Therefore, the central processing unit 14C needs to specify the road machine through which the moving body 12 is passing in order to specify the travel section.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0129

[Correction method] Change

[Correction content]

According to the third aspect of the present invention, the traffic information system generates the ID information including the identification code of the on-road unit which is received for the first time by the vehicle-mounted device after the traveling of the moving body and the reception time of the identification code, Since the ID information is sent out each time the mobile body passes through the roadside machine, the central processing unit identifies each roadside machine and travels without assigning a unique ID number to each mobile body. There is an effect that a section can be specified, and a travel section and travel time of each mobile body can be accurately specified. Also, ID information setting
After that, the same ID information is used for a certain period (until the engine is stopped).
Because it is used, it is possible to know the movement route of the moving body
There is.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0130

[Correction method] Change

[Correction content]

According to the fourth aspect of the present invention, the traffic information system generates the ID information including the random number generated by the vehicle-mounted device and the random number and the time when the random number is generated, and the ID is generated every time the mobile body passes through the road device. Since the information is transmitted, the central processing unit can identify the travel section by identifying each roadside machine without assigning a unique ID number to each mobile body. And there is an effect that what can accurately specify the travel time is obtained. Also, ID information
After the information is set, the same ID information will remain for a certain period (until the engine stops).
Information, you can know the moving route of the moving body
There is an effect.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0140

[Correction method] Change

[Correction content]

According to the fourteenth aspect of the present invention, the vehicle-mounted device in the traffic information system generates the ID information including the identification code of the on-road device received for the first time after the start of traveling of the moving body and the reception time of the identification code, Since the ID information is sent out every time the moving body passes the on-road equipment,
Even if each mobile unit is not assigned a unique ID number, there is an effect that the central processing unit can accurately specify the travel section and travel time of each mobile unit. In addition, after the ID information is set, a certain period (engine stop
Since) uses the same ID information, the moving route of the moving body
There is an effect that you can know.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0141

[Correction method] Change

[Correction content]

According to the fifteenth aspect of the present invention, the vehicle-mounted device in the traffic information system generates a random number and generates ID information including the random number and the random-number generation time, and the ID is generated every time the mobile body passes the roadside device. Since the information is transmitted, there is a device in which the central processing unit can accurately specify the travel section and travel time of each mobile unit even when a unique ID number is not assigned to each mobile unit. There is an effect to be obtained. Also, after setting the ID information, a certain period (engine
The same ID information is used (until the stop),
There is an effect that the movement path can be known.

[Procedure Amendment 10]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (18)

[Claims] 1. A plurality of on-road units installed on the road for transmitting traffic information and receiving signals from each moving body traveling on the road; and a plurality of on-road units mounted on the moving body for receiving signals from the on-road unit. A system including an in-vehicle device that presents traffic information to an occupant and a central processing unit that supplies the traffic information to the on-road device, the in-vehicle device generating ID information that generates ID information that identifies itself. Means for transmitting the ID information to the on-road device corresponding to the communication area in which the vehicle equipped with the on-vehicle device is passing, and the central processing unit has the ID information from the on-vehicle device. Traffic information including receiving means for receiving the ID information via the on-road device, and specifying means for specifying the travel section and travel time of a mobile body equipped with the vehicle-mounted device that has transmitted the ID information from the received ID information. system. 2. Each on-road machine sends out its own identification code, and the on-vehicle machine has a clock for clocking time, and a storage means for storing the identification code and the reception time received from each on-road machine,
The ID information generating means of the vehicle-mounted device retrieves the identification code of the roadside machine that has passed immediately before and the reception time thereof from the storage means when the vehicle passes through one roadside machine, and obtains information including them as a temporary ID. Generated as information, central processing unit ID
The roadside machine which has transmitted the information has a roadside machine detecting means for identifying which roadside machine, and the specifying means of the central processing unit is the detection result of the roadside machine detecting means, and the ID information received from the roadside machine. The traffic information system according to claim 1, wherein the travel section and the travel time are specified from the time when the ID information is received. 3. Each roadside machine sends out an identification code of its own machine, and the onboard machine has a clock for clocking time, and the ID information generating means of the onboard machine receives the first time on the roadway after the traveling of the moving body is started. ID including the machine identification code and the time when the identification code was received
A central processing unit for generating information, the road unit detecting unit for identifying which road unit is the road unit that has transmitted the ID information;
Storage means for storing the ID information received from the on-road machine and the reception time in association with the on-road machine that transmitted the ID information, and the specifying means of the central processing unit is redundantly stored in the storage means. The traffic information system according to claim 1, wherein the travel section and the travel time are specified based on the ID information indicating the information, the information indicating the on-road machine corresponding to the ID information, and the time when the ID information is received. 4. The on-vehicle device has a clock for measuring time, the ID information generating means of the on-vehicle device generates a random number and generates ID information including the random number and the random number generation time, and the central processing unit,
A roadside machine detecting means for identifying which roadside machine the ID information is transmitted to, and a memory for storing the ID information and the reception time received from the roadside machine in association with the roadside machine to which the ID information is transmitted. The identification means of the central processing unit has means for duplicating ID information stored in the storage means, information indicating a roadside machine corresponding to the ID information, and a time when the ID information is received. The traffic information system according to claim 1, wherein a travel section and a travel time are specified. 5. Each on-road device sends out its own identification code, and the on-vehicle device has a clock for clocking time and a storage means for storing the identification code and the reception time received from each on-road device, The ID information generating means of the machine retrieves the identification code of the immediately preceding road machine and its passing time from the storage means when the vehicle passes the one road machine, and the identification code of the first road machine and its passing time. And the information including the identification code of the on-road machine that has passed immediately before and the passing time thereof is generated as temporary ID information, and the identifying means of the central processing unit travels from each of the ID information received from the one on-road machine. The traffic information system according to claim 1, wherein a section and a travel time are specified. 6. Each on-road machine sends out its own identification code, and the on-board machine has a timer for measuring time and a storage means for storing the identification code received from each on-road machine. I
The D information generating means retrieves the identification code of the immediately preceding roadside machine from the storage means when passing through the one roadside machine, and the identification code of the immediately past roadside machine and the roadside machine and the one On a roadside, the central processing unit identifies information about which roadside machine the ID information is transmitted to, as temporary ID information, which includes information including a timer time required for passing between the roadside machine and the roadside machine. 2. The traffic information according to claim 1, further comprising a machine detecting unit, wherein the specifying unit of the central processing unit specifies a travel section and a travel time from the detection result of the roadside machine detecting unit and the ID information received from the roadside machine. system. 7. Each roadside device sends out its own identification code, and the vehicle-mounted device has a timer for measuring time and a storage means for storing the identification code received from each roadside device. I
The D information generating means retrieves the identification code of the immediately preceding roadside machine from the storage means when passing through the first roadway machine, and the identification code received from the first roadway machine and the immediately preceding roadway machine. The information including the received identification code and the timer time required for passing between the road unit and the one road unit is generated as temporary ID information, and the specifying unit of the central processing unit The traffic information system according to claim 1, wherein the travel section and the travel time are specified from the ID information received from the on-road machine. 8. The traffic information system according to claim 1, wherein the central processing unit has processing means for including, in the traffic information, each travel section specified by the specifying means and a travel time in the travel section. 9. The central processing unit has a processing means for transmitting time information in addition to the traffic information, and the ID information generating means of the vehicle-mounted device, when the time information is received via a roadside device, The ID information is generated using the time information.
Alternatively, the traffic information system according to claim 4. 10. A plurality of on-road units installed on the road for transmitting traffic information and receiving signals from each moving body traveling on the road, and for receiving a signal from the on-road unit mounted on the moving body. And present the traffic information to the crew,
A central processing unit in a traffic information system including an in-vehicle device that generates ID information and transmits the ID information to the on-road device, and a central processing device that supplies traffic information to the on-road device. Transportation including receiving means for receiving ID information via the on-road machine, and specifying means for specifying the travel section and travel time of the mobile body equipped with the on-vehicle machine that has sent the ID information from the received ID information Central processing unit in information system. 11. The central processing unit in the traffic information system according to claim 10, further comprising processing means for including each travel section specified by the specifying means and the travel time in the travel section in the traffic information. 12. A plurality of on-road units installed on the road for transmitting traffic information and receiving signals from each moving body traveling on the road, and a moving body of the moving body based on ID information from each of the moving bodies. A vehicle-mounted device mounted on each mobile body in a traffic information system including a central processing unit that specifies a travel section and a travel time and supplies traffic information including the travel section and the travel time to the roadside machine. And
An in-vehicle device in a traffic information system having ID information generating means for generating ID information for identifying itself and transmitting means for transmitting the ID information to the on-road device passing therethrough. 13. A timekeeping clock and a storage means for storing the identification code and the reception time received from each on-road machine, and the ID information generating means, when passing through one on-road machine, 13. The vehicle-mounted device according to claim 12, wherein the identification code of the on-road device that has passed immediately before and its reception time are retrieved from the storage means and information including them is generated as temporary ID information. 14. An ID information generating means has a clock for measuring time, and the ID information generating means includes an identification code of the on-road unit received for the first time after the start of traveling of the mobile unit and an I time including the reception time of the identification code.
The vehicle-mounted device according to claim 12, which generates D information. 15. The vehicle-mounted device according to claim 12, further comprising a clock for measuring time, wherein the ID information generating means generates a random number and generates ID information including the random number and the random number generation time. 16. A timekeeping clock and a storage means for storing an identification code and a reception time received from each roadside machine, wherein the ID information generating means is characterized by: The identification code of the immediately preceding road machine and its passing time are taken out from the storage means, and the information including the identification code of the one road machine and its passing time and the identification code of the immediately preceding road machine and its passing time are stored. The vehicle-mounted device according to claim 12, which is generated as temporary ID information. 17. A timer for measuring time, and a storage means for storing an identification code received from each on-road machine,
The D information generating means retrieves the identification code of the immediately preceding roadside machine from the storage means when passing through the one roadside machine, and the identification code of the immediately past roadside machine and the roadside machine and the one 13. The vehicle-mounted device according to claim 12, wherein information including a timer counting time required for passing between the vehicle and a road device is generated as temporary ID information. 18. A timer for measuring time, and a storage means for storing an identification code received from each on-road machine.
The D information generating means retrieves the identification code of the immediately preceding roadside machine from the storage means when passing through the first roadway machine, and the identification code received from the first roadway machine and the immediately preceding roadway machine. 13. The vehicle-mounted device according to claim 12, wherein information including a received identification code and a timer time required to pass between the road device and the one road device is generated as temporary ID information.