JP2008090568A - Communication system and on-vehicle device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system capable of receiving data with a volume larger than that receivable by an on-road communication device, which can receive data only from an on-vehicle device of a vehicle traveling on a specific lane, from the on-vehicle device. <P>SOLUTION: The on-vehicle device 3 transmits on-vehicle data only when it receives first data from a first communication device 1, that is only when a vehicle 6 carrying the on-vehicle device 3 travels on a specific lane (a first lane), so that a second communication device 2 can receives the on-vehicle data with a volume larger than data receivable by the first communication device 1 only from the on-vehicle device 3 of the vehicle 6 traveled on the specific lane (the first lane). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication system that receives data from an in-vehicle device mounted on a vehicle, and more particularly, to a communication system that receives data from an in-vehicle device mounted on a vehicle traveling in a specific lane.

  In order to perform traffic management smoothly, a communication system in which an in-vehicle device mounted on a vehicle and a road communication device communicate data related to traffic has been proposed.

Optical beacons and DSRC (Dedicated Short Range Communication) are known as road communication devices used in such communication systems (see Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 11-146464 JP 2003-217089 A

  For example, if there is a high possibility that only a vehicle traveling in a specific lane will cause a traffic accident at a junction or a curve on the road, the cause of the traffic accident is analyzed by analyzing the behavior of the vehicle traveling in the lane. Can be used to prevent traffic accidents.

  In order to analyze the behavior of a vehicle traveling in a specific lane, the inventors have acquired a large amount of data such as position data measured by a GPS (Global Positioning System) or image data taken by an in-vehicle camera from only the vehicle. A communication system capable of receiving

  However, although an optical beacon can receive data only from an in-vehicle device of a vehicle traveling in a specific lane, it receives a large amount of data (for example, data of 256 bytes or more) because the communication area is small. I can't. On the other hand, in DSRC, data having a capacity larger than that of an optical beacon (large means that the capacity of data that can be received while passing through the communication area at the highest speed (for example, 70 km / h) is large. However, since the communication area is large and spreads across the lane, data cannot be received from a vehicle traveling in a specific lane.

  Therefore, the present invention provides a communication capable of receiving from the in-vehicle device data having a capacity larger than the capacity of data that can be received by a road communication device that can receive data only from the in-vehicle device of a vehicle traveling in a specific lane. The purpose is to provide a system.

  A communication system according to the present invention includes a first communication device installed on a road having a plurality of lanes, and data having a capacity larger than the capacity of data installed on the road and receivable by the first communication device. A communication system including a receivable second communication device and an in-vehicle device mounted on a vehicle, wherein the first communication device is only a vehicle traveling in a first lane of the plurality of lanes. The first in-vehicle device transmits the first data, the in-vehicle device stores the in-vehicle data, the first receiving unit that receives the first data, and the first receiving unit receives the first data. When it does, it has a transmission means which transmits the said vehicle-mounted data to said 2nd communication apparatus (Claim 1).

  According to the present invention, a road having a plurality of lanes has a first communication device such as an optical beacon and DSRC or WiMAX (Worldwide interoperability for microwave access) having a larger capacity of data that can be received than the first communication device. ) And the like, and the first communication device has data (first data) only for vehicles traveling in a specific lane (first lane) of a plurality of lanes. Send. The in-vehicle device stores in-vehicle data such as position data measured by GPS and image data captured by the in-vehicle camera. When the in-vehicle device receives data (first data) from the first communication device, the in-vehicle device is stored. Data is transmitted to the second communication device. Accordingly, the second communication device receives in-vehicle data having a capacity larger than the capacity of data that can be received by the first communication device from only the in-vehicle device of the vehicle traveling in the specific lane (first lane). can do.

  In the communication system of the present invention, the first data includes data indicating identification of the first lane, and the second communication device is a second lane of the plurality of lanes. Transmitting the second data including the data indicating the identification, and the in-vehicle device further includes second receiving means for receiving the second data, wherein the transmitting means is received by the first receiving means. Comparing the data indicating the identification of the first lane included in the first data with the data indicating the identification of the second lane included in the second data received by the second receiving means; The vehicle data is transmitted when a predetermined condition is satisfied (Claim 2).

  According to the present invention, the first data transmitted by the first communication device includes data indicating identification of a specific lane (first lane). For example, when the road has three lanes and the specific lane is the first lane from the outside, the data indicating the lane identification is “1” that is the lane number counted from the outside. A 2nd communication apparatus transmits the 2nd data containing the data which show the identification of the specific lane (2nd lane) among several lanes separately from a 1st communication apparatus. The in-vehicle device receives the first data and the second data, compares the data indicating the identification of the first lane and the data indicating the identification of the second lane included in each of the first data and the predetermined data, For example, if both data match (if there are multiple data indicating the second lane, the data indicating the second lane includes data indicating the first lane) Data is transmitted to the second communication device. Thereby, for example, the first communication device is installed in each of the three lanes, and the first data including data indicating the identification of each lane is transmitted from each first communication device. The second communication device has a capacity of data that can be received by the first communication device only from the in-vehicle device of the vehicle that has traveled the lane that matches the second lane included in the second data transmitted by the second communication device. It is possible to receive in-vehicle data having a larger capacity.

  The communication system of the present invention has a first communication device installed on a road having a plurality of lanes, and a capacity larger than the capacity of data installed on the road and receivable by the first communication device. A communication system including a second communication device capable of receiving data and an in-vehicle device mounted on a vehicle, wherein the first communication device travels in a first lane of the plurality of lanes. The first data including the data indicating the identification of the first lane is transmitted only to the vehicle, and the in-vehicle device includes a storage unit for storing the in-vehicle data, and a first receiving unit for receiving the first data. And transmission means for transmitting data indicating the identification of the first lane included in the first data received by the first receiving means and the in-vehicle data to the second communication device, The second communication device is connected to the first lane. Means for receiving data indicating different and vehicle data, means for acquiring data indicating identification of the second lane, data indicating identification of the first lane, and identification of the second lane And means for outputting the in-vehicle data when a predetermined condition is satisfied by comparing with the data (Claim 3).

  According to this invention, the road having a plurality of lanes is provided with the first communication device and the second communication device having a larger capacity of data that can be received than the first communication device. One communication device transmits first data including data indicating identification of the lane only to a vehicle traveling in the first lane of the plurality of lanes. The in-vehicle device accumulates the in-vehicle data, receives the first data, and transmits the data indicating the identification of the first lane included in the first data and the accumulated in-vehicle data to the second communication device. To do. The second communication device receives these data, separately acquires data indicating the identification of the second lane, and includes data indicating the identification of the first lane and data indicating the identification of the second lane. In comparison, when a predetermined condition is satisfied, for example, when both data match, the in-vehicle data related to the second lane is output. Thereby, for example, the first communication device is installed in each of the three lanes, and the first data including data indicating the identification of each lane is transmitted from each first communication device. The second communication device receives in-vehicle data having a capacity larger than the capacity of data that can be received by the first communication device from the in-vehicle device of the vehicle traveling in these lanes. Only the in-vehicle data of the in-vehicle device of the vehicle traveling in the matching lane can be output.

  Moreover, the vehicle-mounted apparatus of this invention is a vehicle-mounted apparatus used for said communication system (Claims 4 and 5).

  As described above, according to the communication system and the in-vehicle device of the present invention, the data having a capacity larger than the capacity of the data that can be received by the road communication device that can receive data only from the in-vehicle device of the vehicle traveling in the specific lane, It can be received from the in-vehicle device.

Embodiment 1:
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing an outline of a communication system according to the present invention. The communication system includes a first communication device 1, a second communication device 2, and an in-vehicle device 3.

  Since the first communication device 1 can limit the communication area to a specific lane, the first communication device 1 can transmit / receive data to / from only a vehicle traveling on the specific lane, and mainly has a small capacity of data (for example, up to 256 bytes). Data communication) such as an optical beacon. The first communication device 1 includes a first communication head 1a that transmits and receives data to and from the in-vehicle device, and a first communication control device 1b that controls the first communication head 1a. The first communication head 1a is attached to the upper arm of the first pole 4 installed on the side of the road near the junction of the road, and travels in the first lane (the first lane counting from the outside of the road). It is possible to transmit / receive data to / from an in-vehicle device mounted on the vehicle. The first communication area R1 represents an area where the first communication head 1a can transmit and receive data to and from the in-vehicle device. The first communication control device 1 b is attached to the side portion of the first pole 4. The first communication device 1 continues to transmit predetermined data (first data) at a predetermined transmission cycle to the first communication region R1.

  The second communication device 2 has a wide communication area and cannot send and receive data only to vehicles traveling in a specific lane, but can receive a larger amount of data than the first communication device 1. It is a communication device such as DSRC (Dedicated Short Range Communication) or WiMAX (Worldwide interoperability for microwave access). In particular, mobile WiMAX is useful because it has a long radio wave reach (about 1.5 km) and a very large transmission capacity (about 15 Mbit / sec). The second communication device 2 includes a second communication antenna 2a that transmits and receives data to and from the in-vehicle device, and a second communication control device 2b that controls the second communication antenna 2a. The second communication antenna 2a is attached to the upper part of the second pole 5 installed on the side of the road further downstream of the first pole 4, and not only an in-vehicle device mounted on a vehicle traveling in the first lane, Data can also be transmitted / received to / from an in-vehicle device mounted on a vehicle traveling in the second lane or the third lane. The second communication area R2 represents an area where the second communication antenna 2a can transmit and receive data to and from the in-vehicle device. The second communication control device 2 b is attached to the side portion of the second pole 5. The second communication device 2 continues to transmit predetermined data (second data) to the second communication region R2 at a predetermined transmission cycle.

  In addition, the 1st communication apparatus 1 and the 2nd communication apparatus 2 do not need to be attached to another pole as shown in FIG. 1, and may be attached to the same pole. Further, as shown in FIG. 1, the first communication region R1 and the second communication region R2 do not have to partially overlap each other, and even if there is no overlapping portion, one may be included in the other. .

  The in-vehicle device 3 is an in-vehicle device that can transmit and receive data to and from the first communication device 1 and the second communication device 2, and is mounted on the vehicle 6. The in-vehicle device 3 performs near infrared communication with the first communication head 1a in the first communication region R1, and transmits radio data with the second communication antenna 2a in the second communication region R2. Communicate. Further, an in-vehicle camera (not shown) mounted on the vehicle 6 is connected to the in-vehicle device 3, and image data of a captured image captured by the in-vehicle camera is transmitted from the in-vehicle camera.

  The first communication device 1 transmits and receives data to and from a traffic control center (not shown) via a communication line (not shown) connected to the first communication control device 1b. The first communication device 1 receives traffic data and the like regarding traffic jams and travel times from the traffic control center. The second communication device 2 transmits and receives data to and from the traffic control center via a communication line (not shown) connected to the second communication control device 2b. The 2nd communication apparatus 2 receives the event data regarding the fullness of a restaurant or a parking lot, etc. from a traffic control center.

  FIG. 2 is a block diagram showing the configuration of the in-vehicle device 3. The clock unit 301 measures time. The GPS processing unit 302 receives a GPS signal from a GPS satellite by the GPS receiving unit 321, and based on time information, GPS satellite orbit information, positioning correction information, and the like included in the GPS signal, the position of the in-vehicle device 3 ( Measure latitude, longitude and altitude). The azimuth sensor 303 is composed of an optical fiber gyro and the like, and measures the azimuth and angular velocity.

  The interface unit 304 acquires the speed of the vehicle 6 measured by the vehicle speed sensor 322 detecting the angular speed of the wheels. The interface unit 304 acquires image data of a captured image captured by the in-vehicle camera 323.

  The storage unit 305 stores a vehicle ID indicating the identification of the in-vehicle device 3. In addition, the storage unit 305 measures the time measured by the clock unit 301, the measurement position (latitude, longitude, and altitude) measured by the GPS processing unit 302, and the azimuth sensor 303 at predetermined intervals (for example, 1 second). Each data of the measurement azimuth and measurement angular velocity and the measurement velocity acquired by the interface unit 304 are stored as travel locus data. In addition, the storage unit 305 stores the image data acquired by the interface unit 304 in synchronization with the imaging cycle of the in-vehicle camera 323 (for example, 30 msec). Hereinafter, the traveling locus data and the image data are collectively referred to as in-vehicle data.

  The communication unit 306 transmits the vehicle ID stored in the storage unit 305 to the first communication head 1a via the in-vehicle first antenna 324, and receives traffic data and the like from the first communication head 1a. Details of communication processing between the in-vehicle device 3 and the first communication device 1 will be described later. Further, the communication unit 306 transmits the vehicle ID and the in-vehicle data stored in the storage unit 305 to the second communication antenna 2a via the in-vehicle second antenna 325, and receives event data and the like from the second communication antenna 2a. . Details of communication processing between the in-vehicle device 3 and the second communication device 2 will be described later. Traffic data, event data, and the like received by the communication unit 306 are stored in the storage unit 305.

  The display unit 307 converts traffic data, event data, and the like stored in the storage unit 305 into image data that can be visually recognized by the driver, and displays the image data on the monitor 326.

  The control unit 308 includes a microcomputer, and controls each process of the clock unit 301, the GPS processing unit 302, the direction sensor 303, the interface unit 304, the storage unit 305, the communication unit 306, and the display unit 307. Note that the control unit 308 may be configured by a single microcomputer or a combination of a plurality of microcomputers.

  Next, a communication processing procedure between the in-vehicle device 3 and the first communication device 1 will be described. FIG. 3 is a flowchart showing a communication processing procedure between the in-vehicle device 3 and the first communication device 1. This process is performed every predetermined time (for example, every 10 msec).

  The in-vehicle device 3 determines whether or not the first data is received from the first communication device 1 (step S01). If it is determined that the first data is received (YES in step S01), the in-vehicle device 3 Data indicating that the data has been received is stored in the storage unit 305 (step S02), and predetermined data including the vehicle ID stored in the storage unit 305 is transmitted to the first communication device 1 (step S03). If it is determined that it has not been received (NO in step S01), the in-vehicle device 3 ends the process.

  Here, when the first communication device 1 receives the predetermined data including the vehicle ID from the in-vehicle device 3, the first communication device 1 further stores the vehicle ID and traffic data around the first communication device 1 in the first data, It transmits to the in-vehicle device 3.

  The in-vehicle device 3 determines whether or not the first data including the vehicle ID has been received from the first communication device 1 (step S04). If it is determined that it has been received (YES in step S04), the in-vehicle device 3 Stores the traffic data included in the first data in the storage unit 305 (step S05). If it is determined that it has not been received (NO in step S04), the in-vehicle device 3 repeats the process of step S04.

  Next, a procedure of communication processing between the in-vehicle device 3 and the second communication device 2 will be described. FIG. 4 is a flowchart showing a communication processing procedure between the in-vehicle device 3 and the second communication device 2. This process is performed every predetermined time (for example, every 10 msec).

  The in-vehicle device 3 determines whether or not the second data has been received from the second communication device 2 (step T01). If the in-vehicle device 3 determines that it has been received (YES in step T01), the in-vehicle device 3 stores the storage unit. Predetermined data including the vehicle ID stored in 305 is transmitted to the second communication device 2 (step T02). If it is determined that it has not been received (NO in step T01), the in-vehicle device 3 ends the process.

  The in-vehicle device 3 determines whether or not data indicating that the first data has been received is stored in the storage unit 305 (step T03), and if it is determined that the data is stored (YES in step T03). The in-vehicle device 3 transmits the in-vehicle data stored in the storage unit 305 to the second communication device 2 (step T04), and deletes the data indicating that the first data stored in the storage unit 305 has been received (step S04). Step T05). If it is determined that it is not stored (NO in step T03), the in-vehicle device 3 continues the processing from step T05.

  Here, when the second communication device 2 receives predetermined data including the vehicle ID from the in-vehicle device 3, the second communication device 2 further stores the vehicle ID and event data around the second communication device 2 in the second data, It transmits to the in-vehicle device 3. Moreover, the 2nd communication apparatus 2 will transmit to a traffic control center, if vehicle-mounted data are received. The traffic control center accumulates in-vehicle data and performs a process of analyzing the behavior of the vehicle 6 based on the in-vehicle data.

  The in-vehicle device 3 determines whether or not the second data including the vehicle ID has been received from the second communication device 2 (step T06). If it is determined that it has been received (YES in step T06), the in-vehicle device 3 Stores the event data included in the second data in the storage unit 305 (step T07). If it is determined that it has not been received (NO in step T06), in-vehicle device 3 repeats the process in step T06.

  As described above, when the in-vehicle device 3 receives the first data from the first communication device 1, that is, when the vehicle 6 equipped with the in-vehicle device 3 is traveling in a specific lane (first lane). Only the in-vehicle data is transmitted, so that the second communication device 2 is more than the capacity of data that the first communication device 1 can receive from only the in-vehicle device 3 of the vehicle 6 traveling in the specific lane (first lane). A large amount of in-vehicle data can be received.

  In addition, the process of step S02 received the 1st data containing vehicle ID from the 1st communication apparatus 1 instead of performing after receiving the 1st data which does not contain vehicle ID from the 1st communication apparatus 1 (step S01). (Step S04) It may be performed later.

Embodiment 2:
In the first embodiment described above, the in-vehicle device 3 always transmits the in-vehicle data to the second communication device 2 when receiving the first data from the first communication device 1, but the present invention is limited to this. For example, when data indicating lane identification is received from the second communication device 2 and this data matches the data indicating lane identification included in the first data received from the first communication device 1 In addition, the in-vehicle data can be transmitted to the second communication device 2.

  Hereinafter, Embodiment 2 of the present invention will be described in detail with reference to the accompanying drawings. FIG. 5 is a schematic diagram showing an outline of a communication system according to another embodiment of the present invention. The difference from FIG. 1 is that the first communication device 1 includes three first communication heads 1aa, 1ab, and 1ac. The first communication head 1aa can transmit and receive data to and from the in-vehicle device mounted on the vehicle traveling in the first lane, and the first communication area R1a can transmit and receive data to and from the in-vehicle device. Represents an area. Similarly, the first communication heads 1ab and 1ac can transmit and receive data to and from an in-vehicle device mounted on a vehicle traveling in the second lane and the third lane, respectively. The first communication areas R1b and R1c One communication head 1ab, 1ac represents the area | region which can transmit / receive data with a vehicle-mounted apparatus.

  The first communication device 1 has the first transmission head 1ac to the first communication region R1a, the first communication head 1ab to the first communication region R1b, and the first communication head 1ac to the first communication region R1a. The first data is continuously transmitted to each communication area R1c.

  The second communication device 2 transmits second data including data indicating identification of a lane for which in-vehicle data is desired. For example, when the in-vehicle data of the in-vehicle device mounted on the vehicle traveling in the first lane is desired, the second communication device 2 transmits the second data including the data “1” indicating the lane identification.

  In FIG. 5, the vehicles 6 traveling in the first lane, the second lane, and the third lane are referred to as vehicles 6a, 6b, and 6c, respectively, and the in-vehicle devices that are mounted on the vehicles 6a, 6b, and 6c, respectively. 3 is an in-vehicle device 3a, 3b, 3c, respectively. The in-vehicle device 3 matches the data indicating the lane identification included in the first data received from the first communication device 1 with the data indicating the lane identification included in the second data received from the second communication device 2. In this case, the in-vehicle data is transmitted.

  Next, a communication processing procedure between the in-vehicle device 3 and the first communication device 1 will be described. FIG. 6 is a flowchart showing a communication processing procedure between the in-vehicle device 3 and the first communication device 1. This process is performed every predetermined time (for example, every 10 msec).

  The in-vehicle device 3 determines whether or not the first data is received from the first communication device 1 (step S21). If it is determined that the first data is received (YES in step S21), the in-vehicle device 3 Predetermined data including the vehicle ID stored in the storage unit 305 is transmitted to the communication device 1 (step S22). If it is determined that it has not been received (NO in step S21), the in-vehicle device 3 ends the process.

  When the first communication device 1 receives predetermined data including the vehicle ID from the in-vehicle device 3, the first communication device 1 further stores the vehicle ID and traffic data around the first communication device 1 in the first data. To the in-vehicle device 3. For example, when the vehicle ID of the in-vehicle device 3a is “3a”, the first communication device 1 receives the predetermined data including the vehicle ID “3a” from the in-vehicle device 3a to the first communication head 1aa. Among the four fields for storing vehicle IDs for four lanes provided in advance, the vehicle ID “3a” is stored in the field of the first lane in which the first communication head 1aa can communicate with the in-vehicle device. . That is, these four fields of the first data in which the vehicle ID is stored correspond to data indicating the lane identification. The first communication device 1 further stores traffic data or the like in the first data and transmits it to the in-vehicle device 3a.

  Similarly, when the vehicle ID of the in-vehicle device 3b is “3b”, the first communication device 1 receives the predetermined data including the vehicle ID “3b” from the in-vehicle device 3b to the first communication head 1ab. The vehicle ID “3b” is stored in the field of the second lane among the above four fields of data, and traffic data and the like are stored and transmitted to the in-vehicle device 3b. When the vehicle ID of the in-vehicle device 3c is “3c”, the first communication device 1 receives the predetermined data including the vehicle ID “3c” from the in-vehicle device 3c to the first communication head 1ac. The vehicle ID “3c” is stored in the third lane field of the above four fields, and traffic data and the like are stored and transmitted to the in-vehicle device 3c.

  The in-vehicle device 3 determines whether or not the first data including the vehicle ID has been received from the first communication device 1 (step S23). If it is determined that it has been received (YES in step S23), the in-vehicle device 3 Determines whether the vehicle ID included in the first data matches the vehicle ID stored in the storage unit 305 (step S24). If it is determined that it has not been received (NO in step S23), the in-vehicle device 3 repeats the process of step S23.

  If the in-vehicle device 3 determines that they match (YES in step S24), the vehicle-mounted device 3 searches for a field in which the vehicle ID stored in the storage unit 305 is stored among the four fields of the first data. The lane corresponding to the field is recognized as the lane in which the vehicle 6 is traveling. And the data which show the identification of the lane are memorize | stored in the memory | storage part 305 (step S25). In the case of the in-vehicle device 3a, the field in which the vehicle ID “3a” is stored is searched from the four fields of the first data, and the lane in which the vehicle 6a is traveling in the first lane corresponding to the field. Recognize. Then, data “1” indicating the identification of the first lane is stored. Similarly, in the case of the in-vehicle device 3b, the field storing the vehicle ID “3b” is searched from the four fields of the first data, and the vehicle 6b travels in the second lane corresponding to the field. Recognize it as a lane. Then, data “2” indicating the identification of the second lane is stored. Similarly, in the case of the in-vehicle device 3c, data “3” indicating the identification of the third lane is stored. Furthermore, the in-vehicle device 3 stores the traffic data included in the first data in the storage unit 305 (step S26).

  Next, a procedure of communication processing between the in-vehicle device 3 and the second communication device 2 will be described. FIG. 7 is a flowchart showing a communication processing procedure between the in-vehicle device 3 and the second communication device 2. This process is performed every predetermined time (for example, every 10 msec).

  The in-vehicle device 3 determines whether or not the second data has been received from the second communication device 2 (step T21). If the in-vehicle device 3 determines that the second data has been received (YES in step T21), the in-vehicle device 3 stores the storage unit. Predetermined data including the vehicle ID stored in 305 is transmitted to the second communication device 2 (step T22). The second data includes data “1” indicating identification of a lane for which in-vehicle data is desired. If it is determined that it has not been received (NO in step T21), the in-vehicle device 3 ends the process.

  The in-vehicle device 3 determines whether or not data indicating lane identification is stored in the storage unit 305 (step T23). If it is determined that the data is stored (YES in step T23), the in-vehicle device 3 Determines whether the data indicating the lane identification stored in the storage unit 305 matches the data indicating the lane identification included in the second data (step T24). In the case of the in-vehicle device 3a, the data “1” indicating the lane identification is stored in the storage unit 305, and therefore coincides with the data “1” indicating the lane identification included in the second data. On the other hand, in the case of the in-vehicle devices 3b and 3c, the data “2” and “3” indicating the lane identification are stored in the storage unit 305. Therefore, the data “2” indicating the lane identification included in the second data is stored. Does not match “1”. If it is determined that it is not stored (NO in step T23), the in-vehicle device 3 continues the processing from step T27.

  If it is determined that they match (YES in step S24), the in-vehicle device 3 transmits the in-vehicle data stored in the storage unit 305 to the second communication device 2 (step T25). If it is determined that they do not match (NO in step S24), the in-vehicle device 3 continues the processing after step T26. That is, the in-vehicle device 3a transmits the in-vehicle data to the second communication device 2, but the in-vehicle devices 3b and 3c do not transmit the in-vehicle data to the second communication device 2. The in-vehicle device 3 erases the data indicating the lane identification stored in the storage unit 305 (step T26).

  Here, when the second communication device 2 receives predetermined data including the vehicle ID from the in-vehicle device 3, the second communication device 2 further stores the vehicle ID and event data around the second communication device 2 in the second data. To the in-vehicle device 3. Moreover, the 2nd communication apparatus 2 will transmit to a traffic control center, if vehicle-mounted data are received. The traffic control center accumulates in-vehicle data and performs a process of analyzing the behavior of the vehicle 6 based on the in-vehicle data.

  The in-vehicle device 3 determines whether or not the second data including the vehicle ID is received from the second communication device 2 (step T27). If it is determined that the second data is received (YES in step T27), the in-vehicle device 3 Stores the event data included in the second data in the storage unit 305 (step T28). If it is determined that the signal has not been received (NO in step T27), the in-vehicle device 3 repeats the process in step T27.

  As described above, the in-vehicle device 3 identifies the lane identification included in the first data received from the first communication device 1 and the lane identification included in the second data received from the second communication device 2. The vehicle-mounted data only when the data shown matches, that is, when the vehicle 6 equipped with the vehicle-mounted device 3 is traveling in a specific lane (first lane) for which the second communication device 2 desires vehicle-mounted data. Therefore, the second communication device 2 can receive the first communication device 1 only from the in-vehicle device 3 (in-vehicle device 3a) of the vehicle 6 (vehicle 6a) traveling in the specific lane (first lane). In-vehicle data having a capacity larger than the data capacity can be received.

Embodiment 3:
In the second embodiment described above, the in-vehicle device 3 receives data indicating the lane identification from the second communication device 2, and identifies the lane included in this data and the first data received from the first communication device 1. However, the vehicle-mounted device 3 is not limited to this. For example, the vehicle-mounted device 3 is a vehicle on which the vehicle-mounted device 3 is mounted. Regardless of which lane 6 is traveling, data indicating the lane identification included in the first data received from the first communication device 1 and in-vehicle data are transmitted to the second communication device 2, and The communication device 2 may receive these in-vehicle data and output only the in-vehicle data of a desired lane.

  Hereinafter, Embodiment 3 of the present invention will be described in detail with reference to the accompanying drawings. The schematic diagram showing the outline of the communication system according to Embodiment 3 of the present invention is the same as FIG. Moreover, the flowchart which shows the procedure of the communication process of the vehicle-mounted apparatus 3 and the 1st communication apparatus 1 is the same as FIG.

  Next, a procedure of communication processing between the in-vehicle device 3 and the second communication device 2 will be described. FIG. 8 is a flowchart showing a communication processing procedure between the in-vehicle device 3 and the second communication device 2. This process is performed every predetermined time (for example, every 10 msec).

  The processing from step T41 to T43 is the same as the processing from step T21 to T23 in FIG.

  If the in-vehicle device 3 determines that the data indicating the lane identification is stored in the storage unit 305 (YES in step T43), the data indicating the lane identification stored in the storage unit 305 and the on-vehicle device Data is transmitted to the second communication device 2 (step T44). If the vehicle-mounted device 3a is mounted on the vehicle 6a traveling in the first lane, the data “1” indicating the identification of the lane and the vehicle-mounted data are transmitted, and are mounted on the vehicle 6b traveling in the second lane. If the vehicle-mounted device 3b is mounted on the vehicle 6c traveling on the third lane, the data “3” indicating the lane identification is used. "And in-vehicle data are transmitted respectively. The in-vehicle device 3 erases the data indicating the lane identification stored in the storage unit 305 (step T45).

  Here, when the second communication device 2 receives predetermined data including the vehicle ID from the in-vehicle device 3, the second communication device 2 further stores the vehicle ID and event data around the second communication device 2 in the second data. To the in-vehicle device 3.

  In addition, the second communication device 2 stores data indicating identification of the lane for which in-vehicle data is desired in the storage unit 305. When the data indicating the identification of the lane and the in-vehicle data are received from the in-vehicle device 3, the storage unit 305 The lane identification data stored in 305 is compared with the received lane identification data, and the received in-vehicle data is transmitted to the traffic control center only when they match.

  For example, if the lane for which in-vehicle data is desired is the first lane, the second communication device 2 stores data “1” indicating the lane identification in the storage unit. When the data “1” indicating the lane identification and the in-vehicle data are received from the in-vehicle device 3a, the second communication device 2 indicates the identification of the received lane and the data “1” indicating the lane identification stored in the storage unit. The data “1” is compared. As a result, since both data match, the received in-vehicle data is transmitted to the traffic control center. On the other hand, when receiving the data “2” indicating the lane identification and the in-vehicle data from the in-vehicle device 3b, the second communication device 2 receives the data “1” indicating the lane identification stored in the storage unit and the received lane identification. Is compared with the data “2” indicating that the received vehicle data is not transmitted to the traffic control center. Similarly, the second communication device 2 does not transmit the in-vehicle data to the traffic control center even when the data “2” indicating the lane identification and the in-vehicle data are received from the in-vehicle device 3c.

  In addition, when there are a plurality of lanes for which in-vehicle data is desired, the second communication device 2 may store data indicating the identification of the plurality of lanes. For example, if the lanes for which in-vehicle data is desired are the first lane and the second lane, data “1” and “2” indicating the identification of these lanes are stored. In this case, if the data indicating the identification of the lane received from the in-vehicle device 3 matches the stored data “1” or “2” indicating the identification of the lane, The received in-vehicle data is transmitted to the traffic control center.

  The in-vehicle device 3 determines whether or not the second data including the vehicle ID has been received from the second communication device 2 (step T46). If it is determined that it has been received (YES in step T46), the in-vehicle device 3 Stores the event data included in the second data in the storage unit 305 (step T47). If it is determined that it has not been received (NO in step T46), the in-vehicle device 3 repeats the process of step T46.

  As described above, when the data indicating the lane received from the in-vehicle device 3 matches the data indicating the lane for which the in-vehicle data is desired, the second communication device 2, i.e., specifying the in-vehicle data is desired. Since the in-vehicle data can be output only when the in-vehicle data is received from the in-vehicle device 3 mounted on the vehicle 6 traveling in the first lane, the second communication device 2 is substantially In addition, in-vehicle data having a capacity larger than the capacity of data that can be received by the first communication device 1 only from the in-vehicle device 3 (in-vehicle device 3a) of the vehicle 6 (vehicle 6a) traveling in a specific lane (first lane). Will be able to receive.

  In the above-described first to third embodiments, the in-vehicle device 3 is configured to receive the first data from the first communication device 1, but is not limited thereto, for example, embedded in a road The structure which receives 1st data from a magnetic marker may be sufficient.

Embodiment 4:
The fourth embodiment of the present invention is different from the first embodiment described above in that the first communication device 1 is replaced with a magnetic marker embedded in a road.

  Hereinafter, Embodiment 4 of the present invention will be described in detail with reference to the accompanying drawings. FIG. 9 is a schematic diagram showing an outline of a communication system according to another embodiment of the present invention. The difference from FIG. 1 is that the magnetic marker 7 continues to transmit the first data, and the in-vehicle device 3 receives the first data from the magnetic marker 7.

  Next, a communication processing procedure between the in-vehicle device 3 and the magnetic marker 7 will be described. FIG. 10 is a flowchart showing a communication processing procedure between the in-vehicle device 3 and the magnetic marker 7. The difference from FIG. 3 is that there are only steps S61 and S62 corresponding to steps S01 and S02. The contents of steps S61 and S62 are the same as those of steps S01 and S02.

  Moreover, about the procedure of the communication process of the vehicle-mounted apparatus 3 and the 2nd communication apparatus 2, the flowchart which shows the process procedure of the vehicle-mounted apparatus 3 and the 2nd communication apparatus 2 is the same as FIG.

  As described above, also in the fourth embodiment of the present invention, when the in-vehicle device 3 receives the first data from the magnetic marker 7, that is, the vehicle 6 in which the in-vehicle device 3 is mounted is in a specific lane (first lane). ) Is transmitted only when the vehicle is traveling, the second communication device 2 is connected to the first communication device 1 only from the vehicle-mounted device 3 of the vehicle 6 traveling in a specific lane (first lane). It is possible to receive in-vehicle data having a capacity larger than the capacity of receivable data.

Embodiment 5:
Similarly, the fifth embodiment of the present invention differs from the second embodiment described above in that the first communication device 1 is replaced with a magnetic marker embedded in a road.

  Hereinafter, Embodiment 5 of the present invention will be described in detail with reference to the accompanying drawings. FIG. 11 is a schematic diagram showing an outline of a communication system according to another embodiment of the present invention. The difference from FIG. 5 is that the magnetic markers 7a, 7b, and 7c continue to transmit the first data including data indicating the lanes that can transmit and receive data to and from the in-vehicle device 3, respectively. 3c is a point which receives this 1st data from magnetic marker 7a, 7b, 7c, respectively. Since the lane in which the magnetic marker 7a can exchange data with the in-vehicle device 3 is the first lane, the magnetic marker 7a continues to transmit data “1” indicating the lane identification. Similarly, the magnetic marker 7b continues to transmit data “2” indicating lane identification, and the magnetic marker 7c continues to transmit data “3” indicating lane identification.

  Next, a communication processing procedure between the in-vehicle device 3 and the magnetic marker 7 will be described. FIG. 12 is a flowchart showing a communication processing procedure between the in-vehicle device 3 and the magnetic marker 7. The difference from FIG. 6 is that there are only steps S81 and S82 corresponding to steps S21 and S25. The content of step S81 is the same as step S21. In step S <b> 82, the in-vehicle device 3 stores data indicating the lane identification included in the first data in the storage unit 305 as it is. In the case of the in-vehicle device 3a, data “1” indicating lane identification is stored. Similarly, in the case of the in-vehicle devices 3b and 3c, data “2” and “3” indicating lane identification are stored.

  Moreover, about the procedure of the communication process of the vehicle-mounted apparatus 3 and the 2nd communication apparatus 2, the flowchart which shows the process procedure of the vehicle-mounted apparatus 3 and the 2nd communication apparatus 2 is the same as FIG.

  As described above, also in the fifth embodiment of the present invention, the in-vehicle device 3 receives the data indicating the lane identification included in the first data received from the magnetic marker 7 and the second received from the second communication device 2. When the data indicating the lane identification included in the data match, that is, the vehicle 6 equipped with the in-vehicle device 3 travels in a specific lane (first lane) for which the second communication device 2 desires in-vehicle data. Since the in-vehicle data is transmitted only when the vehicle is in the vehicle, the second communication device 2 receives only the in-vehicle device 3 (the in-vehicle device 3a) of the vehicle 6 (the vehicle 6a) traveling in the specific lane (the first lane). It is possible to receive in-vehicle data having a capacity larger than the capacity of data that can be received by one communication device 1.

Embodiment 6:
Similarly, the sixth embodiment of the present invention differs from the above-described third embodiment in that the first communication device 1 is replaced with a magnetic marker embedded in a road.

  A schematic diagram showing an outline of a communication system according to Embodiment 6 of the present invention is the same as FIG. Moreover, about the procedure of the communication process of the vehicle-mounted apparatus 3 and the magnetic marker 7, the flowchart which shows the procedure of the communication process of the vehicle-mounted apparatus 3 and the magnetic marker 7 is the same as FIG. Moreover, about the procedure of the communication process with the vehicle-mounted apparatus 3 and the 2nd communication apparatus 2, the flowchart which shows the procedure of the communication process with the vehicle-mounted apparatus 3 and the 2nd communication apparatus 2 is the same as FIG.

  As described above, also in the sixth embodiment of the present invention, the second communication device 2 matches the data indicating the identification of the lane received from the in-vehicle device 3 with the data indicating the identification of the lane for which the in-vehicle data is desired. In other words, in-vehicle data can be output only when the in-vehicle data is received from the in-vehicle device 3 mounted on the vehicle 6 traveling in the specific lane (first lane) for which in-vehicle data is desired. The second communication device 2 can be substantially received by the first communication device 1 only from the in-vehicle device 3 (in-vehicle device 3a) of the vehicle 6 (vehicle 6a) traveling in the specific lane (first lane). In-vehicle data having a capacity larger than the data capacity can be received.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a schematic diagram which shows the outline | summary of the communication system which concerns on this invention. It is a block diagram which shows the structure of a vehicle-mounted apparatus. It is a flowchart which shows the procedure of the communication process of a vehicle-mounted apparatus and a 1st communication apparatus. It is a flowchart which shows the procedure of the communication process of a vehicle-mounted apparatus and a 2nd communication apparatus. It is a schematic diagram which shows the outline | summary of the communication system which concerns on other embodiment of this invention. It is a flowchart which shows the procedure of the communication process of a vehicle-mounted apparatus and a 1st communication apparatus. It is a flowchart which shows the procedure of the communication process of a vehicle-mounted apparatus and a 2nd communication apparatus. It is a flowchart which shows the procedure of the communication process of a vehicle-mounted apparatus and a 2nd communication apparatus. It is a schematic diagram which shows the outline | summary of the communication system which concerns on other embodiment of this invention. It is a flowchart which shows the procedure of the communication process of a vehicle-mounted apparatus and a magnetic marker. It is a schematic diagram which shows the outline | summary of the communication system which concerns on other embodiment of this invention. It is a flowchart which shows the procedure of the communication process of a vehicle-mounted apparatus and a magnetic marker.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st communication apparatus 1a, 1aa, 1ab, 1ac 1st communication head 1b 1st communication control apparatus 2 2nd communication apparatus 2a 2nd communication antenna 2b 2nd communication control apparatus 3, 3a, 3b, 3c In-vehicle apparatus 4 1st Pole 5 Second pole 6, 6a, 6b, 6c Vehicle 7, 7a, 7b, 7c Magnetic marker 301 Clock unit 302 GPS processing unit 303 Direction sensor 304 Interface unit 305 Storage unit 306 Communication unit 307 Display unit 308 Control unit 321 GPS reception 322 Vehicle speed sensor 323 Car-mounted camera 324 Car-mounted first antenna 325 Car-mounted second antenna 326 Monitor R1, R1a, R1b, R1c First communication area R2 Second communication area

Claims (5)

A first communication device installed on a road having a plurality of lanes;
A second communication device installed on the road and capable of receiving a larger amount of data than the amount of data that the first communication device can receive;
A communication system including an in-vehicle device mounted on a vehicle,
The first communication device transmits first data only to a vehicle traveling in the first lane of the plurality of lanes,
The in-vehicle device is
Storage means for storing in-vehicle data;
First receiving means for receiving the first data;
A communication system comprising: a transmission unit configured to transmit the in-vehicle data to the second communication device when the first reception unit receives the first data. The first data includes data indicating identification of the first lane,
The second communication device transmits second data including data indicating identification of a second lane of the plurality of lanes,
The in-vehicle device further includes second receiving means for receiving the second data,
The transmitting means includes data indicating the identification of the first lane included in the first data received by the first receiving means, and the second data received by the second receiving means. The communication system according to claim 1, wherein the in-vehicle data is transmitted when a predetermined condition is satisfied by comparing with data indicating identification of the second lane. A first communication device installed on a road having a plurality of lanes;
A second communication device installed on the road and capable of receiving a larger amount of data than the amount of data that the first communication device can receive;
A communication system including an in-vehicle device mounted on a vehicle,
The first communication device transmits first data including data indicating identification of the first lane only to a vehicle traveling in the first lane of the plurality of lanes,
The in-vehicle device is
Storage means for storing in-vehicle data;
First receiving means for receiving the first data;
Transmission means for transmitting data indicating the identification of the first lane included in the first data received by the first reception means and the in-vehicle data to the second communication device;
The second communication device is
Means for receiving data indicating identification of the first lane and the in-vehicle data;
Means for obtaining data indicative of identification of the second lane;
Comparing the data indicating the identification of the first lane with the data indicating the identification of the second lane, and providing means for outputting the in-vehicle data when a predetermined condition is satisfied. Communication system.   A vehicle-mounted device used in the communication system according to claim 1 or 2.   An in-vehicle device used in the communication system according to claim 3.

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