JP5345863B2 - Roadside device and communication system - Google Patents

Description

The present invention roadside unit for wirelessly receiving the collected data from the information collecting device to gather the predetermined collected data in response to operation of the business start, as well as relates to a communication system made up of the information collection device and the roadside device It is.

  Cars such as freight transport trucks and taxis are equipped with in-vehicle devices as information collection devices for operation management. The in-vehicle device collects predetermined collection data such as daily business report data generated according to the operation status of the vehicle and collects the data in a recording medium such as a memory card. Conventionally, delivery of the collected data to the office PC has been performed according to the following procedure. First, the driver operates an end button provided on the vehicle-mounted device. In response to this operation, the vehicle-mounted device adds end data to the end of the collected data. Thereafter, the driver removes the memory card from the vehicle-mounted device, brings it into the office, and connects it to the PC.

  However, in this method, since the memory card is inserted and removed every time, the connection portion of the memory card is severely deteriorated, which causes the life of the vehicle-mounted device to be shortened. There are also problems such as driver error and forgetting to remove the memory card. Therefore, for example, a roadside device capable of wireless communication with the vehicle-mounted device is provided at the entrance of the office, and the collected data is transferred to the roadside device by wireless communication while the vehicle equipped with the vehicle-mounted device passes through the communication area of the roadside device. It is considered to be.

  However, in the wireless communication between the vehicle-mounted device and the roadside device mounted on a moving body such as a vehicle, the vehicle-mounted device may leave the communication area of the roadside device during transmission of collected data, or the communication environment may deteriorate. Transmission of collected data may end (interrupt) in the middle. For this reason, it may be difficult to completely transmit the collected data from the vehicle-mounted device to the roadside device.

  If transmission of collected data is interrupted in this way, transmission of collected data resumes when the vehicle-mounted device enters the communication area of the roadside device again, but at this time, transmission of collected data is not restarted from the beginning, but the previous collection is collected. It is conceivable to improve communication efficiency by performing transmission from where data transmission is interrupted. That is, as shown in FIG. 10, when the collection data D1 to D3 among the collection data D1 to D5 is transmitted in the first communication and interrupted, the collection data D1 to D3 are not transmitted in the second communication. The remaining collected data D4 and D5 are transmitted. Specifically, when the roadside device starts communication with the vehicle-mounted device, it searches for past collected data transmitted from the vehicle-mounted device. A transmission request is issued to the vehicle-mounted device to transmit.

  However, simply by receiving the collected data, the roadside unit cannot determine whether the collected data transmitted last time is in the middle of communication or communication is completed. Therefore, as shown in FIG. 11, it is conceivable that the vehicle-mounted device transmits the collected data D1 to D5 with the data length L1 added to the head. Thereby, the data length L1 of the collected data D1 to D5 is notified to the roadside device so that the roadside device side can determine whether the collected data transmitted last time is in the middle of communication or the communication has been completed. It is possible to do. Specifically, the roadside device searches for past collected data transmitted from the onboard device when communication with the onboard device is started, and the data length of the collected data transmitted last time and the data added to the head thereof. If the length does not match, it is determined that the collected data transmitted last time was in the middle, and a transmission request is sent to the vehicle-mounted device so that the collected data is transmitted continuously.

  However, in the business using the vehicle-mounted device as described above, the business may return to the office during the business, and then leave the office and resume the business. Even in this case, in order to use the communication time effectively, we want to send the collected data to the roadside unit even when returning to the office on the way. The collected data is sequentially added by the vehicle-mounted device. Therefore, as shown in FIG. 12, after the collection data D1 to D3 of the collection data D1 to D5 are transmitted in the first communication, the job is resumed and the collection data D6 and D7 are added. Even so, it is desired to request transmission of all the remaining collected data D4 to D7 in the second communication. However, since the roadside device requests transmission of the subsequent collected data with reference to the data length received in the first communication, as shown in FIG. 13, it requests transmission of the added collected data D6 and D7. I can't.

  Therefore, it has been proposed that the vehicle-mounted device transmits collected data with an end marker added at the end (Patent Document 1). However, when starting a new business, since it is managed as different business data, the operation to clear (erase) the collected data with the vehicle-mounted device is performed. There is a problem that collected data cannot be distinguished for each business. That is, as shown in FIG. 14, after transmitting the collected data D1-1 to D1-5 collected by the business A in the first communication, the new business B is performed and the collected data D2-1 collected by the business B ~ D2-2 is transmitted, on the roadside unit side, the collected data D2-1 ~ D2-2 is a continuation of the collected data D1-1 ~ D1-5, or different from the collected data D1-1 ~ D1-5 It cannot be distinguished whether it is new data. Therefore, in the conventional communication system, when collected data is added after transmitting collected data from the vehicle-mounted device to the roadside device, it is transmitted from the continuation of the collected data when the vehicle-mounted device and the roadside device can communicate again. Can not do it. In addition, it is impossible to achieve both distinction of collected data for each business.

JP-A-8-115282

Accordingly, the present invention, even if the collected data is added after sending the collected data to the roadside unit from the car mounting device, a continuation of the collected data when it becomes communicable and the re-mounted device and the roadside device It is an object of the present invention to provide a roadside device that can request transmission from the mobile station and that can also distinguish collected data for each job, and a communication system including the vehicle-mounted device and the roadside device.

The invention according to claim 1, which has been made in order to solve the above-mentioned problem, collects predetermined collection data according to the operation start operation, and starts the operation start at the head according to the entry into the communication area with the roadside unit. Wireless communication with an information collection device that wirelessly transmits the collected data with the end date added and the date / time information when the collected data was first collected after the operation of starting the operation was added. A second wireless device for performing the operation, a second wireless control means for controlling the second wireless device so as to receive the collected data transmitted from the information collecting device, and a storage for storing the received collected data in a recording medium in roadside unit having a means to, when the second radio control unit, collected data from the information collection device end marker to the recording medium is not added is recorded, the collected data Of the first transmission request to be transmitted from the continued controls the second radio unit to transmit to the information collection apparatus, the recording medium to the end marker is recorded data collected from the added the information collecting device Or when the collected data from the information collecting device is not recorded on the recording medium, the second radio is transmitted so that a second transmission request to be transmitted from the head of the collected data is transmitted to the information collecting device. The date and time information added to the collected data transmitted from the information collecting device in response to the second transmission request and the collected data from the information collecting device recorded on the recording medium. If the date and time information are the same, transmits a third transmission request to be transmitted from the continuation of the collected data, said storing means, said first transmission request or the third said information in response to the transmission request Collection device coupled to the data collected from the continued and the information collection device stored in the recording medium of the collected data sent from accumulating on the recording medium, the information collected in response to the second transmission request When the collected data to which the same date and time information as the collected data transmitted from the apparatus is added is not stored in the recording medium, the transmitted collected data is stored as new collected data in the recording medium. The roadside unit is characterized by recording .

The invention according to claim 2 collects predetermined collection data according to the operation start operation, and the date and time information when the operation start operation is performed at the head in response to the entry into the communication area with the roadside device, or An information collection device that wirelessly transmits the collection data with the date and time information on which the collected data was first collected after the start of the operation and an end marker added at the end, and the collected data transmitted from the information collection device. In a communication system provided with a second radio control unit that controls the second radio unit to receive and a roadside unit that stores the received collected data in a recording medium, if the second radio control unit, which collects data from the information collection device end marker to the recording medium is not added is recorded, the first transmission necessity to transmit the continuation of the collected data Said controlling said second radio unit to transmit to the information collection apparatus, if the collected data from the information collection device end marker is added to the recording medium is recorded, or the recording medium When the collected data from the information collection device is not recorded, the second wireless device is controlled to transmit a second transmission request to be transmitted from the head of the collected data to the information collection device, and the second transmission If the date and time information added to the collected data transmitted from the information collecting device in response to the request is the same as the date and time information added to the collected data from the information collecting device recorded on the recording medium, the collection sending a third transmission request to be transmitted from the continuation of the data, the storage means, said collection that has been transmitted from the information collection device in response to the first transmission request or the third transmission request And combining the collected data from the information collection device stored in continuation with said recording medium over data stored on the recording medium, the collected transmitted from the information collection device in accordance with the second transmission request When the collected data to which the same date and time information as the data date and time information is added is not stored in the recording medium, the transmitted collected data is recorded as new collected data on the recording medium. It exists in a communication system.

As described above, according to the first and second aspects of the invention, by sending the collected data with the date and time information added to the beginning and the end marker added to the end, the roadside from the vehicle-mounted device by the date and time information and the end marker is transmitted. Even if the collected data is added after the collected data is sent to the device, the roadside device may make a transmission request from the continuation of the collected data when the vehicle-mounted device and the roadside device become communicable again. In addition, it is possible to transmit collected data that can be distinguished for each job of collected data on the roadside unit side. In addition, even if the collected data is added after sending the collected data from the OBE to the roadside device, you can request transmission from the continuation of the collected data when the OBE and the roadside device can communicate again, Moreover, it is possible to distinguish the collected data for each job on the roadside unit side. In addition, it is possible to distinguish the collected data for each job on the roadside device side.

It is a block diagram which shows one Embodiment of the communication system incorporating the vehicle equipment and roadside device as an information collection device of this invention. It is a block diagram of the onboard equipment shown in FIG. It is a block diagram of the roadside device shown in FIG. It is a flowchart which shows the process sequence of CPU of the onboard equipment shown in FIG. It is explanatory drawing which shows the structure of the collection data transmitted from the onboard equipment shown in FIG. It is a flowchart which shows the process sequence of CPU of the roadside device shown in FIG. It is explanatory drawing for demonstrating operation | movement of a roadside device. It is explanatory drawing for demonstrating operation | movement of a roadside device. It is explanatory drawing for demonstrating operation | movement of a roadside device. It is explanatory drawing for demonstrating the conventional problem. It is explanatory drawing for demonstrating the conventional problem. It is explanatory drawing for demonstrating the conventional problem. It is explanatory drawing for demonstrating the conventional problem. It is explanatory drawing for demonstrating the conventional problem.

  Hereinafter, embodiments 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 incorporating an in-vehicle device and a roadside device as an information collecting device of the present invention. FIG. 2 is a configuration diagram of the vehicle-mounted device 2 shown in FIG. FIG. 3 is a block diagram of 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 and a roadside device 4 installed in an office 3 that manages the taxi vehicle 1. First, the structure of the said vehicle equipment 2 is demonstrated with reference to FIG. The vehicle-mounted device 2 includes a DSRC antenna AT 1, a DSRC radio device 21, a GPS antenna AT 2, a GPS radio device 22, a microcomputer (μCOM) 23, and an interface (I / F) 24.

  The DSRC antenna AT1 is an antenna for DSRC (Dedicated Short Range Communication) mounted on the taxi vehicle 1. The DSRC radio device 21 is a device for performing DSRC with the roadside device 4 (to be described later) using the DSRC antenna AT1 to receive and transmit data. The DSRC radio unit 21 has a modulation / demodulation circuit that demodulates data received by the DSRC antenna AT1 and outputs the demodulated data to the μCOM 23, or modulates transmission data output from the μCOM 23 and outputs the modulated data to the DSRC antenna AT1.

  The GPS antenna AT2 is a GPS (Global Positioning System) antenna mounted on the taxi vehicle 1. The GPS wireless device 22 is a device for receiving a GPS signal transmitted from GSP satellite communication using the GPS antenna AT2. This GPS signal includes date and time information. The GPS radio unit 22 has a demodulation circuit that demodulates data received by the GPS antenna AT2 and outputs the demodulated data to the μCOM 23.

  The μCOM 23 is used in various processing steps in the CPU 23A, a central processing unit (CPU) 23A that performs various processes according to a processing program, a ROM 23B that is a read-only memory that stores a program for processing performed by the CPU 23A, and the like. The RAM 23C is a readable / writable memory having a work area, a data storage area for storing various data, and the like. The I / F 24 is an interface circuit for the CPU 23 </ b> A in the μCOM 23 to communicate with the taximeter 5.

  Next, the configuration of the roadside device 4 described above will be described with reference to FIG. The roadside device 4 includes a DSRC antenna AT3, a DSRC radio device 41 as a second radio device, a μCOM 42, and an I / F 43. The DSRC antenna AT3 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 entering the office 3 always passes through the communication area 7. The DSRC wireless device 41 is a device that performs DSRC with the vehicle-mounted device 2 using the DSRC antenna AT3, and receives and transmits data. The DSRC radio 41 includes a modulation / demodulation circuit that demodulates data received by the DSRC antenna AT3 and outputs the demodulated data to the μCOM 42, or converts transmission data output from the μCOM 42 and outputs the data to the DSRC antenna AT3.

  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. The management device 8 outputs the transferred collected data from an output terminal 9 such as a printer.

  The operation of the communication system configured as described above will be described below with reference to FIGS. When the ignition of the taxi vehicle 1 is turned on, the CPU 23A of the vehicle-mounted device 2 starts the process shown in FIG. Thereafter, taxi vehicle 1 leaves office 3 from the exit of office 3 and starts business. First, the CPU 23A of the vehicle-mounted device 2 determines whether or not a business start switch (not shown) provided in the taximeter 5 has been operated by the driver (step S1).

  When the operation start switch is operated by the driver (Y in step S1), the CPU 23A determines that a new operation is to be started and erases the collected data stored in the RAM 23C (step S2). Thereafter, the CPU 23A functions as a collecting unit, and performs a data collecting process of collecting collected data from the taximeter 5 according to business daily report data such as a renting time and a fee of the taxi vehicle 1 (step S3).

  When the collected data is generated for the first time after the operation of the business start switch by the data collecting process in step S3 (Y in step S4), the CPU 23A functions as a collecting means, controls the GPS radio 22 to receive the GPS signal, A date and time collection process for collecting the date and time information T1 included in the received GPS signal is performed (step S5). In this date / time collection process, as shown in FIG. 5, the CPU 23A adds the date / time information T1 to the head of the collection data D1 generated first in the data collection process of step S3 and stores it in the RAM 23C. Further, the CPU 23A adds an end marker to the end of the collected data D1 generated first and stores it in the RAM 23C.

  Thereafter, the CPU 23A again performs data collection processing described later (step S6). On the other hand, if the job start switch has not been operated even after a predetermined time has elapsed since the ignition was turned on (Y in step S11), the CPU 23A determines that the interrupted job is to be continued, and steps S2 to S5. Without proceeding to step S6. In the data collection process in step S6, the CPU 23A collects collected data from the taximeter 5 in accordance with daily business report data such as the renting time and fee of the taxi vehicle 1 as in step S2.

  At this time, as shown in FIG. 5, the CPU 23A combines the collected data Dm collected after the collected data D1 to D (m−1) already stored in the RAM 23C and stores the combined data in the RAM 23C. The CPU 23A overwrites the collected data Dm collected on the end marker added to the end of the collected data D1 to D (m-1), and then adds the end marker to the end of the collected data D1 to Dm to store in the RAM 23C. To store. The data collection process in step S6 is repeated until the taxi vehicle 1 enters the communication area 7.

  Thereafter, when the taxi vehicle 1 finishes business, or when the business is temporarily suspended and enters the communication area 7 of the entrance 6 in the office 3, the vehicle-mounted device 2 receives radio waves from the roadside device 4. In response to this, the CPU 23A of the vehicle-mounted device 2 determines that it has entered the communication area 7 (Y in step S7), and controls the DSRC radio device 21 to transmit the identification information of the taxi vehicle 1 (step S8). . Next, after the CPU 23A of the vehicle-mounted device 2 functions as the first wireless control unit and controls the DSRC wireless device 21 to transmit the collected data D1 to Dn according to the transmission request from the roadside device 4 (step S9), The process ends.

  On the other hand, when the taxi vehicle 1 enters the communication area 7 and receives the identification information from the vehicle-mounted device 2 (Y in step S21 in FIG. 6), the CPU 42A in the roadside device 4 corresponds to the received identification information. The collected data is searched from a database as a recording medium in the management device 8 (step S22). As a result, if the collected data corresponding to the received identification information is not searched (Y in step S23), the CPU 42A proceeds to step S28 described later. On the other hand, when the collected data corresponding to the received identification information is searched (N in step S23), the CPU 42A proceeds to step S24 described later.

  For example, as shown in FIG. 7A, the communication between the on-vehicle device 2 and the roadside device 4 is interrupted and only the collected data D1 to D3 among the collected data D1 to D5 stored in the RAM 23C can be received. In this case, the end marker M is not added to the end of the collected data D1 to D3 searched in step S22. Therefore, if the end marker M is not added to the end of the retrieved collection data D1 to D3 (N in step S24), the CPU 42A of the roadside device 4 determines that the previous communication has been interrupted, and has already collected the collected data. A request is made to transmit the continuation of the data D1 to D3 (step S25).

  The CPU 42A of the vehicle-mounted device 2 that has received the transmission request in step S25 continues the collected data D1 to D3 with the time information T1 added to the beginning and the end marker M added to the end, as shown in FIG. 7B. Collected data D4 and D5 are transmitted (step S10 in FIG. 4). When the CPU 42A of the roadside device 4 receives the collected data D4 and D5 from the vehicle-mounted device 2 (step S26), it functions as a storage means, and as shown in FIG. 7C, the collected data D1 to D3 retrieved in step S22. After that, the collected data D4 and D5 received in step S26 and the end marker M are combined and stored in the database in the management apparatus 8 (step S27), and the process is ended.

  On the other hand, for example, as shown in FIG. 8A, when all the collected data D1-1 to D1-3 can be received by the previous communication between the vehicle-mounted device 2 and the roadside device 4, the process proceeds to step S22. An end marker M is added to the end of the retrieved collected data D1-1 to D1-3. Therefore, if the end marker M is added to the end of the retrieved collection data D1-1 to D1-3 (Y in step S24), the CPU 42A of the roadside device 4 requests to send the collection data from the top. (Step S28).

  When a new operation is started after the previous communication, the vehicle-mounted device 2 deletes the previously collected collection data D1-1 to D1-3 and stores the collection data D2-1 to D2-4 after the new time information T2. To do. Therefore, the CPU 23A of the vehicle-mounted device 2 that has received the transmission request in step S28 adds time information T2 corresponding to a new job at the beginning and an end marker M at the end, as shown in FIG. 8B. The collected data D2-1 to D2-4 are sequentially transmitted (step S10 in FIG. 4).

  When the CPU 42A of the roadside device 4 receives the date and time information T2 added to the head of the collected data D2-1 to D2-4 (step S29), the collected data D1-1 to D1-3 searched by the received date and time information T2 If the date and time information T1 added to the head of the data is new (Y in step S30), the collected data D2-1 to D2-4 of the business different from the retrieved collection data D1-1 to D1-3 are stored. It is determined that the data is transmitted, and the collection data D2-1 to D2-2 are continuously received (step S31). Then, as shown in FIG. 8C, the CPU 42A stores the collected data D2-1 to D2-4 transmitted in the current communication as new collected data (step S32), and then ends the process.

  On the other hand, when the work before communication is continued after the previous communication, the vehicle-mounted device 2 overwrites the end marker M added to the end of the collected data D1 to D3 transmitted last time, as shown in FIG. 9B. Collected data D4 and D5 are stored. Therefore, the CPU 23A of the vehicle-mounted device 2 that has received the transmission request in step S28, as shown in FIG. 9C, adds the collected data D1 to D5 with the time information T1 added to the head and the end marker M added to the tail. Are sequentially transmitted (step S10 in FIG. 4). When the CPU 42A of the roadside device 4 receives the date / time information T1 added to the head of the collected data D1 to D5 (step S29), the date / time information added to the head of the collected data D1 to D3 searched by the received date / time information T1. If it is the same as T1 (N in step S30), it is determined that the job is the same as the previously collected data D1 to D3, and a request is made to transmit the continuation of the collected data D1 to D3 that has already been collected (step S33).

  Receiving the transmission request in step S33, the CPU 23A of the vehicle-mounted device 2 immediately stops the transmission of the collected data D1 to D3 immediately after the collection data D4 and D5 and the end marker M sequentially as shown in FIG. 9C. Transmit (step S10). When the CPU 42A of the roadside device 4 receives the collected data D4 and D5 and the end marker M (step S34), as shown in FIG. 9D, after the collected data D1 to D3 searched in step S22, in step S34. The collected data D4 and D5 transmitted and the end marker M are combined and stored in the database in the management device 8 (step S35), and the process is terminated.

  According to the communication system described above, as shown in FIG. 5, the CPU 23A of the vehicle-mounted device 2 collects the date / time information T1 when the collected data is first collected after the operation of starting the work, and the date / time information T1 collected at the top is collected. The collected data D1 to Dn with the end marker M added at the end are transmitted. Therefore, even when the collected data is added after the collected data is transmitted from the vehicle-mounted device 2 to the roadside device 4 by the date and time information T1 and the end marker M, the vehicle-mounted device 2 and the roadside device 4 can communicate again. In this case, the roadside device 4 can make a transmission request from the continuation of the collected data, and the roadside device 4 can transmit the collected data so that the collected data can be distinguished for each job.

  Further, according to the communication system described above, the CPU 42A of the roadside device 4 stores the collected data in which the same date information as the date information added to the head of the collected data transmitted from the vehicle-mounted device 2 is added to the database. The DSRC radio 41 is controlled so as to transmit to the in-vehicle device 2 a transmission request for transmitting the continuation of the collected data to which the same date / time information stored in the database is added. Further, the CPU 42A of the roadside device 4 combines the collected data transmitted from the vehicle-mounted device 2 in response to the transmission request and the collected data of the same date and time information accumulated in the database and accumulates them in the database. Thus, even if the collected data is added after the collected data is transmitted from the vehicle-mounted device 2 to the roadside device 4, the collected data is continued when the vehicle-mounted device 2 and the roadside device 4 can communicate again. Transmission request can be made, and the roadside device 4 can also distinguish the collected data for each job.

  Further, according to the communication system described above, the CPU 42A of the roadside device 4 transmits the collected data to which the same date information as the date information added to the beginning of the collected data is not accumulated in the database. The collected data is accumulated in the database as new collected data. Therefore, it is possible to distinguish the collected data for each job on the roadside device 4 side.

  In the above-described embodiment, the date / time information when the collected data is first collected after the operation of the job start switch is collected as the date / time information. However, the present invention is not limited to this. The date / time information may be, for example, date / time information when the operation start switch is operated.

  In the above-described embodiment, the end marker M is added every time collected data is generated in the vehicle-mounted device 2, but the present invention is not limited to this. For example, an end marker may be added according to the roadside device 4 entering the communication area 7.

  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.

2 Onboard equipment (information collection device)
4 Roadside equipment 7 Communication area 21 DSRC radio equipment (1st radio equipment)
23A CPU (collecting means, first wireless control means)
41 DSRC radio (second radio)
42A CPU (second radio control means, storage means)

Claims (2)

Collects predetermined collection data according to the operation for starting the business, and the date / time information when the operation for starting the business is started at the beginning according to the entry into the communication area with the roadside device, or first after the operation for starting the business A second wireless device that performs wireless communication with an information collection device that wirelessly transmits the collected data with the collection date and time information collected and the end marker added at the end ;
Second wireless control means for controlling the second wireless device so as to receive the collected data transmitted from the information collecting device;
In a roadside device comprising storage means for storing the received collected data in a recording medium,
The second wireless control means is
When the collected data from the information collecting device to which no end marker is added is recorded on the recording medium, the first transmission request to be transmitted from the continuation of the collected data is transmitted to the information collecting device. Control two radios,
When the collected data from the information collecting apparatus with the end marker added is recorded on the recording medium, or when the collected data from the information collecting apparatus is not recorded on the recording medium, the collected data Controlling the second wireless device to transmit a second transmission request to be transmitted from the beginning to the information collecting device;
The date / time information added to the collected data transmitted from the information collecting device in response to the second transmission request is the same as the date / time information added to the collected data from the information collecting device recorded on the recording medium. The third transmission request to be transmitted from the continuation of the collected data,
The storage means
The recording by combining the collected data from the first transmission request or the third transmission request the information collection device stored in continuation to the recording medium of the collected data transmitted from the information collection device in accordance with the Accumulate in the medium ,
If the collected data to which the same date / time information as the date / time information of the collected data transmitted from the information collection device in response to the second transmission request is not stored in the recording medium, the transmitted collection A roadside device that records data on the recording medium as new collected data . Collects predetermined collection data according to the operation for starting the business, and the date / time information when the operation for starting the business is started at the beginning according to the entry into the communication area with the roadside device, or first after the operation for starting the business An information collection device that wirelessly transmits the collected data with the collection date and time information collected and an end marker added at the end ;
A roadside device comprising: second wireless control means for controlling the second wireless device so as to receive the collected data transmitted from the information collecting device; and storage means for storing the received collected data in a recording medium. In a communication system provided with
The second wireless control means is
When the collected data from the information collecting device to which no end marker is added is recorded on the recording medium, the first transmission request to be transmitted from the continuation of the collected data is transmitted to the information collecting device. Control two radios,
When the collected data from the information collecting apparatus with the end marker added is recorded on the recording medium, or when the collected data from the information collecting apparatus is not recorded on the recording medium, the collected data Controlling the second wireless device to transmit a second transmission request to be transmitted from the beginning to the information collecting device;
The date / time information added to the collected data transmitted from the information collecting device in response to the second transmission request is the same as the date / time information added to the collected data from the information collecting device recorded on the recording medium. The third transmission request to be transmitted from the continuation of the collected data,
The storage means
The recording by combining the collected data from the first transmission request or the third transmission request the information collection device stored in continuation to the recording medium of the collected data transmitted from the information collection device in accordance with the Accumulate in the medium ,
If the collected data to which the same date / time information as the date / time information of the collected data transmitted from the information collection device in response to the second transmission request is not stored in the recording medium, the transmitted collection A communication system , wherein data is recorded on the recording medium as new collected data .

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