JP5095334B2 - Communication system, vehicle-mounted device, and roadside device - Google Patents

Description

  The present invention relates to a communication system, a vehicle-mounted device, and a roadside device, and is performed between, for example, a vehicle-mounted device that collects vehicle operation data and a roadside device that is installed on the office side that manages the operation data. The present invention relates to a communication system, a vehicle-mounted device used in the communication system, and a roadside device.

  Commercial vehicles such as freight trucks and taxis are equipped with onboard equipment for operation management. The vehicle-mounted device receives data such as business instruction information set by a management device in the office when going out from the office (site) (at the time of delivery). Thereafter, the vehicle-mounted device collects operation data (collected data) according to the operation status of the vehicle and collects the data to be recorded on a recording medium such as a memory card. When the vehicle-mounted device returns to the office (when entering the warehouse), it passes the operation data collected during one operation from the delivery to the entry to the management device. Conventionally, data transmission / reception between the above-described management apparatus and the vehicle-mounted device has been performed using a recording medium such as a memory card.

  However, in the method using a recording medium such as a memory card, the recording medium and the management device are connected every day when leaving, and data such as business instruction information is recorded on the recording medium. It was necessary to take home, connect the recording medium and the management device, and transfer the operation data recorded on the recording medium to the management device. For this reason, work efficiency is not good, and work mistakes may occur. Therefore, a method of transmitting and receiving data between the management apparatus and the vehicle-mounted device using a wireless line has been proposed (Patent Document 1).

  The above-described method using a wireless line can automatically transmit and receive the data just by passing the vehicle-mounted device through the communication area with the roadside device connected to the management device. However, in the conventional method using a wireless line, an exit and an entrance are provided in the office, and when the vehicle-mounted device enters the communication area of the exit antenna installed at the exit, the roadside device is connected from the exit antenna to the vehicle-mounted device. When the vehicle-mounted device enters the communication area of the entrance antenna installed at the entrance, the roadside device can receive operation data from the vehicle-mounted device. Alternatively, a sensor for detecting the traveling direction of the vehicle is provided at the entrance, and when the exit direction is detected by the sensor, data is transmitted from the roadside device to the vehicle-mounted device, and the entrance direction is detected by the sensor. Sometimes the roadside device can receive the operation data transmitted from the vehicle-mounted device.

In any case, in order to transmit data from the roadside device to the vehicle-mounted device at the time of delivery, and for the roadside device to receive operation data from the vehicle-mounted device at the time of storage, the office has an entrance and an exit, It is necessary to install an antenna or a sensor for detecting the traveling direction of the vehicle, which increases the scale of the apparatus and causes a problem in cost.
JP 2006-92232 A

  Therefore, the present invention pays attention to the above-described problems, and the vehicle-mounted device can receive data from the roadside device at the time of delivery, and the roadside device can receive the collected data from the vehicle-mounted device at the time of warehousing. It is an object to provide a communication system, an in-vehicle device, and a roadside device.

  The invention according to claim 1, which has been made to solve the above-described problems, uses a roadside antenna that forms a communication area at an entrance / exit of a site, roadside reception means that receives data using the roadside antenna, and the roadside antenna. Roadside transmission means for transmitting data, a vehicle-mounted antenna mounted on a vehicle, vehicle-mounted reception means for receiving data using the vehicle-mounted antenna, vehicle-mounted transmission means for transmitting data using the vehicle-mounted antenna And a vehicle-mounted device having collection means for collecting collected data to be transmitted to the roadside device, and determines whether the vehicle-mounted device has entered the communication area of the roadside device. If there is the collected data that has not been transmitted to the roadside device when it is determined that the entry has been made by the entry judging means and the entry judging means, data indicating that fact Data presence / absence transmitting means for transmitting presence / absence information to the roadside device and transmitting data no-information indicating to the roadside device if there is no collected data not transmitted to the roadside device; After the data presence information is transmitted by the vehicle transmission control means for transmitting the collected data that has not been transmitted to the roadside device to the vehicle transmission means, and the data absence information is transmitted by the data presence / absence transmission means. Vehicle-mounted reception control means for causing the in-vehicle receiving means to receive roadside data transmitted from the roadside device, and the roadside device receives the data presence information from the onboard device. When the roadside receiving means receives the collected data from the vehicle-mounted device, the roadside receiving means receives the data no information from the vehicle-mounted device. Wherein it consists in the communication system characterized in that it has a road side transmission control means for transmitting, to a roadside data to be transmitted to the vehicle-mounted device on.

  The data presence / absence transmitting means transmits the information indicating the size of the collected data as the data presence information if there is the collected data that has not been transmitted to the roadside device. 2. The communication system according to claim 1, wherein information indicating a data size of 0 is set to be transmitted as the no-data information if there is no collected data not transmitted to the communication system.

  The invention according to claim 3 further comprises a notifying means for notifying that when the vehicle exits the communication area of the roadside device during the transmission of the collected data. Exists in the system.

  The invention according to claim 4 is a vehicle-mounted antenna mounted on a vehicle, and vehicle-mounted receiving means for receiving data from a roadside device in which a roadside antenna that forms a communication area at a doorway of a site is arranged using the vehicle-mounted antenna. In the vehicle-mounted device having the vehicle-mounted transmission means for transmitting data to the roadside device using the vehicle-mounted antenna and the collection means for collecting the collected data to be transmitted to the roadside device, whether the vehicle has entered the communication area of the roadside device If there is the collected data that has not been transmitted to the roadside device when it is determined that the entry has been entered by the entry determination unit, data presence information indicating that fact is transmitted to the roadside device. Then, if there is no collected data that has not been transmitted to the roadside unit, data presence / absence transmitting means for transmitting data no-information indicating that to the roadside unit, and data presence / absence transmission After the data presence information is transmitted by the stage, the in-vehicle transmission control unit that causes the in-vehicle transmission unit to transmit the collected data that has not been transmitted to the roadside device, and the data absence information is transmitted by the data presence / absence transmission unit. The vehicle-mounted device includes vehicle-mounted reception control means for causing the vehicle-mounted receiving means to receive roadside data transmitted from the roadside device after being transmitted.

  The invention according to claim 5 is a roadside antenna that forms a communication area at the entrance of a site, roadside receiving means that receives data from the vehicle-mounted device using the roadside antenna, and the vehicle-mounted device that uses the roadside antenna. On the roadside device having roadside transmission means for transmitting data to the roadside receiving means, when receiving data presence information indicating that there is collected data not transmitted from the onboard device to the roadside device, from the onboard device to the roadside receiving means. Roadside reception control means for receiving the collected data, and roadside data to be transmitted to the roadside transmission means to the roadside transmission means when receiving no data information indicating that there is no collection data not transmitted from the onboard equipment to the roadside equipment And a roadside transmission control means for transmitting.

  As described above, according to the first, fourth, and fifth aspects of the invention, since there is collected data that has not been transmitted to the roadside device at the time of warehousing, data presence information is transmitted from the onboard device, and the roadside device is removed from the onboard device. Can receive collected data. On the other hand, since there is no collected data not transmitted to the roadside device at the time of delivery, no data information is transmitted from the onboard device, and the onboard device can receive the roadside data from the roadside device. Therefore, the vehicle-mounted device can receive roadside data from the roadside device when leaving the vehicle, and the roadside device collects from the vehicle-mounted device at the time of loading, without separating the entrance and exit of the site or providing a sensor that detects the traveling direction of the vehicle. Data can be received and cost reduction can be achieved.

  According to the second aspect of the present invention, the information indicating the data size, the data presence information, and the data no information need to be transmitted separately by diverting the information indicating the data size as the data presence information and the data absence information. Disappears.

  According to the third aspect of the present invention, the informing means informs the user that he / she has left the communication area of the roadside device in the middle of transmitting the collected data, so that the collection of the collected data collected by the collecting means is not completed. Can be prevented.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment of a communication system according to the present invention. FIG. 2 is a configuration diagram of the vehicle-mounted device 2 shown in FIG. FIG. 3 is a functional block diagram of the CPU 22A in the vehicle-mounted device 2 shown in FIG. FIG. 4 is a block diagram of the roadside device 4 shown in FIG. FIG. 5 is a functional block diagram of the CPU 42A in the roadside device 4 shown in FIG.

  As shown in FIG. 1, the communication system includes an in-vehicle device 2 mounted on a taxi vehicle 1 as a vehicle, a roadside device 4 installed in an office 3 as a site for managing the taxi vehicle 1, have. First, the structure of the said vehicle equipment 2 is demonstrated with reference to FIG. The vehicle-mounted device 2 includes a vehicle-mounted antenna AT 1, a wireless device 21, a microcomputer (μCOM) 22, and an interface (I / F) 23.

  The in-vehicle antenna AT1 is an antenna mounted on the taxi vehicle 1. The radio device 21 as the in-vehicle transmission means and the in-vehicle reception means performs the DSRC (Dedicated Short Range Communication) with the roadside device 4 to be described later by using the in-vehicle antenna AT1, and receives and transmits data. It is equipment for doing. The radio device 21 has a modulation / demodulation circuit that demodulates and outputs the data received by the vehicle-mounted antenna AT1 to the μCOM 22 or modulates transmission data output from the μCOM 22 and outputs the data to the vehicle-mounted antenna AT1.

  The μCOM 22 is used in various processing steps in the central processing unit (CPU) 22A that performs various processes according to the processing program, a ROM 22B that is a read-only memory storing a program for processing performed by the CPU 22A, and the like. RAM 22C which is a readable / writable memory having a work area, a data storage area for storing various data, and the like. The I / F 23 is an interface circuit for the CPU 22 </ b> A in the μCOM 22 to communicate with the taximeter 5.

  Next, the functional configuration of the CPU 22A of the vehicle-mounted device 2 described above will be described with reference to FIG. The CPU 22A has a data collection function 22A1, an ID / data size transmission function 22A2, a data transmission function 22A3, a data reception function 22A4, a data output function 22A5, an application determination function 22A6, and a switching function 22A7. ing.

  The data collection function 22A1 collects operation data (collection data) corresponding to the operation status such as the renting time and fee of the taxi vehicle 1 from the taximeter 5 and sequentially records it in the untransmitted area 22C1 of the collected data provided in the RAM 22C. It is a function to do. The ID / data size transmission function 22A2 is a function for controlling the wireless device 21 to transmit the vehicle ID of the vehicle-mounted device 2 and the data size of the operation data recorded in the untransmitted area 22C1. The data transmission function 22A3 controls the radio device 21 to transmit the operation data recorded in the non-transmission area 22C1, and erases the transmitted operation data from the non-transmission area 22C1 and records it in the transmission area (not shown). It is.

  The data reception function 22A4 is a function for controlling the radio unit 21 to receive roadside data such as business instruction information from the roadside unit 4 and record it in the roadside data area 22C2 provided in the RAM 22C. The data output function 22A5 is a function for displaying roadside data recorded in the roadside data area 22C2 on a display (not shown) or the like.

  The application determination function 22A6 is a function that determines that the ID / data size transmission function 22A2 is activated when it is determined that the taxi vehicle 1 has entered the communication area 7 of the roadside device 4. In addition, the application determination function 22A6 is used when the data size of the operation data recorded in the untransmitted area 22C1 is 0 after the transmission of the vehicle ID and the data size is completed by the ID / data size transmission function 22A2. This is a function for determining that the data reception function 22A4 is to be activated, and for determining that the data transmission function 22A3 is to be activated when the data size is larger than zero. The switching function 22A7 is a function for selecting the function determined by the application determination function 22A6.

  Next, the structure of the said roadside device 4 is demonstrated with reference to FIG.1 and FIG.4. The roadside unit 4 includes a roadside antenna AT2, a radio unit 41, a μCOM 42, and an I / F 43. The roadside antenna AT2 is an antenna that forms a communication area 7 at the entrance 6 of the office 3, as shown in FIG. The taxi vehicle 1 that enters and exits the office 3 always passes through the communication area 7. The wireless device 41 as a roadside transmission unit and a roadside reception unit is a device that performs DSRC with the vehicle-mounted device 2 using the roadside antenna AT2 to receive and transmit data. The radio 41 has a modulation / demodulation circuit that demodulates and outputs the data received by the roadside antenna AT2 to the μCOM 42, or modulates transmission data output from the μCOM 42 and outputs the modulated data to the roadside antenna AT2.

  The μCOM 42 stores a CPU 42A that performs various types of processing according to a processing program, a ROM 42B that is a read-only memory that stores a program for processing performed by the CPU 42A, a work area that is used in various types of processing in the CPU 42A, and various types of data. RAM 42C which is a readable / writable memory having a data storage area and the like. The I / F 43 is an interface circuit for the CPU 42 </ b> A in the μCOM 42 to communicate with the management device 8 configured from a PC (personal computer) on the office 3 side.

  Next, the functional configuration of the CPU 42A of the roadside device 4 described above will be described with reference to FIG. The CPU 42A has a data reception function 42A1, a data transmission function 42A2, an application determination function 42A3, and a switching function 42A4.

  The data reception function 42A1 is a function for controlling the wireless device 41 to receive the vehicle ID, data size, and operation data from the vehicle-mounted device 2 and recording the received data in the reception data area 42C2 of the RAM 42C. The operation data recorded in the reception data area 42C2 is transferred to the management device 8 via the I / F 43. The management device 8 outputs the transferred operation data from an output terminal 9 such as a printer.

  The data transmission function 42A2 searches the roadside data corresponding to the ID received from the table of the vehicle ID and roadside data recorded in the database area 42C1 in the RAM 42C, controls the radio unit 41, and searches the roadside data. It is a function to transmit. The table of the vehicle ID and the roadside data is input by the management device 8 via the I / F 43.

  The application determination function 42A3 determines that the data reception function 42A1 is activated when the data size transmitted from the vehicle-mounted device 2 is 0, and activates the data transmission function 42A2 when the data size is not 0. It is a function that decides. The switching function 42A4 is a function for selecting the function determined by the application determination function 42A3.

  The operation of the communication system configured as described above will be described below with reference to FIGS. FIG. 6 is a flowchart showing the processing procedure of the CPU 22A of the vehicle-mounted device 2 shown in FIG. FIG. 7 is a flowchart showing a processing procedure of the CPU 42A of the roadside device 4 shown in FIG. First, when an office worker turns on the power of the roadside device 4, the CPU 42A in the roadside device 4 starts processing, and controls the wireless device 41 to start transmitting a question signal from the roadside antenna AT2 (FIG. 7). Step S21). On the other hand, when the driver turns on the ignition of the taxi vehicle 1, the CPU 22A starts processing, and controls the radio device 21 so that the interrogation signal from the roadside device 4 can be received (step S1 in FIG. 6).

  Next, when the driver passes through the communication area 7 formed at the doorway 6 in order to let the taxi vehicle 1 go out, the vehicle-mounted device 2 can receive the interrogation signal from the roadside device 4. Thereby, the CPU 22A functions as an entry determination unit, determines that the vehicle has entered the communication area 7 (Y in Step 2), and determines whether operation data is recorded in the untransmitted area 22C1. The CPU 22A determines that there is no operation data recorded in the non-transmission area 22C1 at the time of delivery (N in Step 3), operates as a data presence / absence transmission means, controls the radio device 21, controls the vehicle ID, and the roadside device. Information indicating data size 0 is transmitted to the roadside device 4 as information indicating that there is no operation data not transmitted to 4 (step S4). Next, the CPU 22A functions as an in-vehicle reception control means, and controls the wireless device 21 so as to be able to receive roadside data such as business instruction information transmitted from the roadside device 4 (step S5).

  On the other hand, when receiving the vehicle ID from the vehicle-mounted device 2, the CPU 42 </ b> A on the roadside device 4 determines that the taxi vehicle 1 has entered the communication area 7 (Y in step S <b> 22 in FIG. 7), and then transmits from the vehicle-mounted device 2. The data size of the operation data recorded in the untransmitted area 22C1 is received (step S23). If the data size is information indicating that the data size is 0 (N in Step S24), the CPU 42A refers to the database area 42C1 and acquires roadside data corresponding to the vehicle ID received from the vehicle-mounted device 2 (Step S31). Next, the CPU 42A functions as roadside transmission control means, transmits the acquired roadside data (step S32), and then returns to step S22.

  On the other hand, when the reception of roadside data from the roadside device 4 is completed (Y in step S6 in FIG. 6), the CPU 22A of the vehicle-mounted device 2 records the received roadside data in the roadside data area 22C2 and displays it on a display (not shown). (Step S7), the process returns to Step S1. Thereby, the driver can confirm roadside data such as business instruction information at the time of delivery.

  Next, when the taxi vehicle 1 leaves and starts business, it is determined in step 2 that the vehicle does not always enter the communication area 7 (N in step S2), and steps S8 and S9 are repeatedly performed to obtain operation data. Collected. Specifically, the CPU 22A functions as a collection unit, and when operation data such as renting time and fee is generated in the taximeter 5 (Y in step S8), the operation data is recorded in the untransmitted area 22C1 (step S9). After that, when the taxi vehicle 1 finishes its business and passes through the communication area 7 formed at the entrance 6 to allow the taxi vehicle 1 to enter, the vehicle-mounted device 2 can receive the interrogation signal from the roadside device 4. .

  Thereby, CPU22A judges that it entered into communication area 7 (Y in Step S2), and judges whether operation data is recorded in untransmitted area 22C1. Since operation data collected during business is recorded in the untransmitted area 22C1, the CPU 22A determines that there is operation data recorded in the untransmitted area 22C1 (Y in step S3), and data Information indicating that there is operation data that does not transmit the vehicle ID and the data size of the operation data recorded in the non-transmission area 22C1 to the roadside device 4 by controlling the wireless device 21 as the presence / absence transmitting means. It transmits (step S10), and prepares for transmission of operation data recorded in the untransmitted area 22C1 (step S11).

  On the other hand, when receiving the vehicle ID from the vehicle-mounted device 2, the CPU 42A of the roadside device 4 determines that the taxi vehicle 1 has entered the communication area 7 (Y in step S22 in FIG. 7), and then transmitted from the vehicle-mounted device 2. The data size of the operation data recorded in the untransmitted area 22C1 is received (step S23). If the data size is not information indicating 0 as described above (N in step S24), the CPU 42A determines that the taxi vehicle 1 has arrived and transmits a data transmission command to the vehicle-mounted device 2 ( Step S25), works as roadside reception control means, and makes it possible to receive operation data from the vehicle-mounted device 2 (step S26).

  On the other hand, when the CPU 22A of the vehicle-mounted device 2 receives a data transmission command from the roadside device 4 (Y in step S12 in FIG. 6), it functions as a vehicle-mounted transmission control means and is recorded in the untransmitted area 22C1 according to the instruction of the roadside device 4. The operation data that is present is transmitted (step S13). In addition, CPU22A will transmit a transmission completion signal, if transmission of all the operation data is completed. When the interrogation signal cannot be received from the roadside device 4, the CPU 22A determines that it has left the communication area 7 (Y in step 14).

  Next, the CPU 22A determines whether or not the transmission of the operation data has been completed (step S15). If the transmission is completed (Y in step S15), the operation data recorded in the untransmitted area 22C1 is erased and recorded in the transmitted area (not shown) and recorded in the untransmitted area 22C1. After setting the data size of the operation data to 0 (step S16), the process returns to step S1.

  On the other hand, if the transmission is not completed (N in step S15), the CPU 22A functions as a notification unit, and notifies a display (not shown) that the transmission is not completed (step S17). With this display, it is possible to prompt the driver to return the taxi vehicle 1 to the communication area 7 again to complete the transmission of operation data. Thereafter, the CPU 22A deletes the transmitted operation data from the operation data recorded in the untransmitted area 22C1, records it in the transmitted area (not shown), and subtracts the transmitted data from the transmitted data. (Step S18), and the process returns to step S1.

  On the other hand, if the CPU 42A of the roadside device 4 receives the transmission completion signal from the vehicle-mounted device 2 and the transmission of the operation data is normally completed (Y in step S27), the received operation data is stored in the reception data area 42C2. After (step S28), the process returns to step S22. On the other hand, the CPU 42A of the roadside device 4 does not receive a transmission completion signal from the vehicle-mounted device 2 even if a predetermined time has elapsed, and if transmission of operation data is not completed normally (N in step S27), transmission of operation data. It is determined that the taxi vehicle 1 has left the communication area 7 before the end of the operation, works as a notification means, displays a message to that effect on a display (not shown) (step S29), and receives the received operation data. The received data area 42C2 is stored (step S30), and the process returns to step S2.

  According to the communication system configured as described above, since there is operation data that is not transmitted to the roadside device 4 at the time of warehousing, information indicating a data size larger than 0 is transmitted from the vehicle-mounted device 2, and the roadside device 4 is transmitted from the vehicle-mounted device 2. You can receive navigation data. On the other hand, since there is no operation data not transmitted to the roadside device 4 at the time of delivery, information indicating the data size 0 is transmitted from the vehicle-mounted device 2, and the vehicle-mounted device 2 can receive the roadside data from the roadside device 4. Therefore, the vehicle-mounted device 2 can receive the roadside data from the roadside device 4 when leaving the vehicle without separating the entrance and the exit of the office 3 or providing a sensor for detecting the traveling direction of the taxi vehicle 1. The device 4 can receive the operation data from the vehicle-mounted device 2, and the cost can be reduced.

  Further, according to the communication system having the above-described configuration, the information indicating the data size, the data presence information, and the data no information are separately transmitted by using the data size information as the data presence information and the data absence information. There is no need to do it.

  Moreover, according to the communication system of the structure mentioned above, CPU22A, 42A displays the fact that it left the communication area 7 of the roadside device 4 in the middle of transmission of operation data on a display, and transmission of the collected operation data Can be prevented from entering without being completed.

  In addition, according to embodiment mentioned above, although the vehicle equipment 2 was mounted in the taxi vehicle 1, this invention is not limited to this. For example, it may be mounted on a business vehicle in which operation data is accumulated, such as a cargo transport truck. Moreover, although the example which collects the sales data of the taxi vehicle 1 as operation data was demonstrated, measuring data, such as a dead weight and a multi recorder, can be collected as operation data, for example.

  Further, according to the above-described embodiment, the information indicating the data size is used as data existence information and no data information, but the present invention is not limited to this. For example, data presence information indicating that there is operation data that has not been transmitted to the roadside device 4 or no data information indicating that there is no operation data may be transmitted.

  Moreover, in embodiment mentioned above, although the fact that the communication area 7 of the roadside device 4 was left in the middle of transmission of operation data was displayed on the indicator mounted in the onboard equipment 2 and the roadside equipment 4, this invention is this. It is not limited to. For example, a method of notifying with sound such as a buzzer is also conceivable. In addition, in order to prevent the taxi vehicle 1 from leaving the communication area 7 of the roadside device 4 during transmission of operation data, a traffic light or a block that stops the taxi vehicle 1 until the communication is completed in the communication area 7 It is also possible to install a machine.

  Moreover, in embodiment mentioned above, the fact that it has left the communication area 7 of the roadside device 4 during the transmission of the operation data is displayed on the display device mounted on the vehicle-mounted device 2 or the roadside device 4, and provided again at the entrance / exit 6. However, because the communication area 7 is near the entrance / exit 6 of the office 3, a long stagnation affects the subsequent taxi vehicle 1 and congestion occurs on the general road. there's a possibility that. In order to avoid this, a method such as installing a dedicated communication area 7 for performing re-communication at a place other than the communication area 7 provided at the entrance 6 can be considered.

  Moreover, although embodiment mentioned above demonstrated the example which used the operation data of the vehicle as collection data transmitted to the roadside device 4, this invention is not limited to this. For example, digital camera shooting data, mail data, and music data may be collected as collected data. When shooting data, mail data, music data, or the like is collected as collected data, the roadside antenna AT2 may be installed at the entrance of a garage (site) in the home, for example.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

It is a block diagram which shows one Embodiment of the communication system of this invention. It is a block diagram of the vehicle-mounted system shown in FIG. It is a functional block diagram of the vehicle-mounted CPU shown in FIG. It is a block diagram of the roadside device shown in FIG. It is a functional block diagram of the roadside CPU shown in FIG. It is a flowchart which shows the process sequence of CPU of the onboard equipment shown in FIG. It is a flowchart which shows the process sequence of CPU of the roadside device shown in FIG.

Explanation of symbols

1 taxi vehicle (vehicle)
2 Onboard equipment 3 Office (site)
4 Roadside device 7 Communication area 21 Radio (vehicle-mounted receiving means, vehicle-mounted transmitting means)
22A CPU (collection means, entry determination means, data presence / absence transmission means, in-vehicle transmission control means, in-vehicle reception control means, notification means)
41 Radio (roadside receiving means, roadside transmitting means)
41A CPU (roadside reception control means, roadside transmission control means, notification means)
AT1 Car antenna AT2 Roadside antenna

Claims (5)

A roadside unit having a roadside antenna that forms a communication area at the entrance of a site, a roadside receiving unit that receives data using the roadside antenna, and a roadside transmitting unit that transmits data using the roadside antenna, and a vehicle A vehicle-mounted antenna mounted, vehicle-mounted receiving means for receiving data using the vehicle-mounted antenna, vehicle-mounted transmitting means for transmitting data using the vehicle-mounted antenna, and collecting means for collecting collected data to be transmitted to the roadside device, In a communication system comprising an on-vehicle device having
An entry determination means for determining whether or not the vehicle-mounted device has entered the communication area of the roadside device, and the collected data not transmitted to the roadside device when it is determined that the vehicle has entered by the entry determination means. Data presence / absence transmitting means for transmitting data presence information indicating that to the roadside device if there is, and if there is no collected data not transmitted to the roadside device, transmitting no data information indicating that to the roadside device And after the data presence information is transmitted by the data presence / absence transmission means, the on-vehicle transmission control means for causing the on-vehicle transmission means to transmit the collected data not transmitted to the roadside device, and the data presence / absence transmission means Vehicle-mounted reception control means for causing the vehicle-mounted receiving means to receive roadside data transmitted from the roadside device after the data no information is transmitted by, and
When the roadside unit receives the data present information from the onboard unit, the roadside receiving control unit causes the roadside receiving unit to receive the collected data from the onboard unit, and when the roadside unit receives the data no information from the onboard unit, the roadside unit Roadside transmission control means for causing the transmission means to transmit roadside data to be transmitted to the vehicle-mounted device. If there is the collected data that has not been transmitted to the roadside device by the data presence / absence transmitting means, information indicating the size of the collected data is transmitted as the data presence information, and the collected data is not transmitted to the roadside device 2. The communication system according to claim 1, wherein if there is no data, information indicating a data size of 0 is set to be transmitted as the no-data information.   The communication system according to claim 1 or 2, further comprising notification means for notifying that when the vehicle exits the communication area of the roadside device during transmission of the collected data. A vehicle-mounted antenna mounted on a vehicle; vehicle-mounted receiving means for receiving data from a roadside device in which a roadside antenna that forms a communication area at a doorway of a site using the vehicle-mounted antenna is disposed; and In the vehicle-mounted device having vehicle-mounted transmission means for transmitting data to the roadside device and collection means for collecting collected data to be transmitted to the roadside device,
Entry determination means for determining whether the roadside unit has entered the communication area;
If there is the collected data that has not been transmitted to the roadside unit when it is determined that the entry determination unit has entered, the data presence information indicating that fact is transmitted to the roadside unit and transmitted to the roadside unit. Data presence / absence transmitting means for transmitting no data information indicating that there is no collected data to the roadside device;
After the data presence information is transmitted by the data presence / absence transmitting unit, the in-vehicle transmission control unit that causes the in-vehicle transmission unit to transmit the collected data that has not been transmitted to the roadside device;
On-vehicle reception control means for causing the in-vehicle receiving means to receive roadside data transmitted from the roadside device after the data no-information is transmitted by the data presence / absence transmitting means. . A roadside antenna that forms a communication area at the entrance / exit of a site, roadside receiving means that receives data from the vehicle-mounted device using the roadside antenna, and roadside transmission that transmits data to the vehicle-mounted device using the roadside antenna A roadside device comprising:
Roadside reception control means that causes the roadside receiving means to receive the collected data from the onboard equipment when receiving data presence information indicating that there is collected data that has not been transmitted from the onboard equipment to the roadside equipment,
Roadside transmission control means for causing the roadside transmission means to transmit roadside data to be transmitted to the onboard equipment when receiving no data information indicating that there is no collected data not transmitted from the onboard equipment to the roadside equipment; A roadside device characterized by

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