JP2010081153A - Installed communication device, in-vehicle communication device, and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology that prevents the traffic saturation state at an intersection where a plurality of roads on which vehicles travel intersect with each other. <P>SOLUTION: An installed communication device 10 includes: a road information storing means 12 that stores road information in which direction information, indicating directions based on an intersection, and frequency specifying information, being information for specifying a frequency used for communication, are made to correspond to each other; an information processing means 14 that calculates a vehicle position being the position of a vehicle on the basis of a radio signal received by a receiving means, calculates the vehicle direction on the basis of the vehicle position, searches the direction information indicating the direction from the direction information stored by the road information storing means 12, and acquires the frequency specifying information made to correspond to the direction information; a transmission-information preparing means 15 that prepares transmission information including the frequency specifying information acquired by the information processing means 14; and a transmitting means 16 that transmits the transmission information prepared by the transmission-information preparing means 15 to an in-vehicle communication device 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an installation communication device, an in-vehicle communication device, and a communication system.

  Conventionally, vehicle-to-vehicle and road-to-vehicle cooperative communication uses a wireless communication technology that uses autonomous decentralized control, and vehicles (on-board communication devices) and roadside devices (installed communication devices) communicate directly with each other, thereby providing safety support during vehicle travel. The purpose is to provide entertainment information. Various techniques for safety support during vehicle travel have been disclosed (see, for example, Patent Document 1).

JP 2001-067589 A

  However, when each vehicle or roadside machine performs autonomous distributed processing, there is a problem (traffic capacity limit) that traffic becomes saturated and communication becomes almost impossible.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is a technology capable of preventing traffic saturation at an intersection where a plurality of roads on which vehicles travel are intersected. Is to provide.

  In order to solve the above problem, according to an aspect of the present invention, in-vehicle communication that is an installed communication device installed at or around an intersection where a plurality of roads intersect, and is a communication device mounted on a vehicle Receiving means for receiving radio signals from the apparatus; intersection position information storing means for storing intersection position information for specifying the position of the intersection that is the position of the intersection; azimuth information indicating the direction relative to the intersection; and frequency used for communication Road information storing means for storing road information associated with frequency specifying information that is information for specifying the vehicle position, and a vehicle position that is the position of the vehicle is calculated based on a radio signal received by the receiving means, and based on the vehicle position Information for obtaining the frequency specifying information associated with the direction information by calculating the direction of the vehicle, searching the direction information indicating the direction from the direction information stored by the road information storage means. Processing means, transmission information creation means for creating transmission information including frequency specifying information acquired by the information processing means, and transmission means for sending the transmission information created by the transmission information creation means to the in-vehicle communication device. An installed communication device is provided.

  The information processing unit described above may use the vehicle position direction calculated based on the intersection position specified by the intersection position information as the vehicle direction calculated based on the vehicle position.

  The information processing means described above may use, as the vehicle orientation calculated based on the vehicle position, the orientation indicated by the traveling direction vector that is the amount of change in the vehicle position over a predetermined time.

  The information processing means described above may use the vehicle position calculated from the radio wave intensity of the radio signal or the arrival time of the radio signal as the vehicle position calculated based on the radio signal received by the receiving means.

  In order to solve the above-described problem, according to another aspect of the present invention, an installed communication device installed at an intersection where a plurality of roads intersect or around the intersection, the intersection position being the position of the intersection is determined. Stores road information that associates intersection position information storage means for storing specified intersection position information, azimuth information indicating an azimuth with reference to the intersection, and frequency identification information that is information for specifying a frequency used for communication. Road information storing means, information processing means for calculating a vehicle position indicating the position of the vehicle based on a radio signal received by the receiving means, road position information in which intersection position information, direction information and frequency specifying information are associated with each other A transmission information generating means for generating transmission information including vehicle position information indicating the vehicle position, and a transmitter for transmitting the transmission information generated by the transmission information generating means to the in-vehicle communication device. When installation communication apparatus comprising a are provided.

  In order to solve the above-described problem, according to another aspect of the present invention, an installed communication device installed at an intersection where a plurality of roads intersect or around the intersection, the intersection position being the position of the intersection is determined. Stores road information that associates intersection position information storage means for storing specified intersection position information, azimuth information indicating an azimuth with reference to the intersection, and frequency identification information that is information for specifying a frequency used for communication. The transmission information creation means for creating transmission information including road information storage means, intersection position information, road information in which direction information and frequency identification information are associated, and transmission information created by the transmission information creation means An installation communication device is provided that includes a transmission means for transmitting to the communication device.

  In order to solve the above-described problem, according to another aspect of the present invention, an installed communication device installed at an intersection where a plurality of roads intersect or around the intersection, the intersection position being the position of the intersection is determined. Intersection position information storage means for storing the specified intersection position information, transmission information creation means for creating transmission information including the intersection position information, and transmission information created by the transmission information creation means is transmitted to the in-vehicle communication device. An installation communication device comprising a transmission means is provided.

  In order to solve the above-described problem, according to another aspect of the present invention, an in-vehicle communication device that is a communication device mounted on a vehicle, and is installed at or around an intersection where a plurality of roads intersect. Corresponding information on the position of the intersection, which is the position of the intersection, from the installed communication device, the direction information indicating the direction based on the intersection, and the frequency specifying information which is the information specifying the frequency used for communication Receiving means for receiving the road information, own vehicle information obtaining means for obtaining vehicle position information indicating the position of the vehicle from the installed communication device, and calculating the direction of the vehicle based on the vehicle position, and indicating the direction An in-vehicle communication device is provided that includes information processing means for retrieving information from direction information received by the receiving means and acquiring frequency specifying information associated with the direction information.

  In order to solve the above problems, according to another aspect of the present invention, a radio signal is received from an installed communication device installed at or around an intersection where a plurality of roads intersect, and at the position of the intersection. Receiving means for receiving intersection position information for identifying a certain intersection position, road information in which azimuth information indicating a direction based on the intersection and frequency identification information that is information for identifying a frequency used for communication are associated with each other; The vehicle position which is the position of the vehicle is calculated based on the radio signal received by the receiving means, the direction of the vehicle is calculated based on the vehicle position, and the direction information indicating the direction is searched from the direction information received by the receiving means. And an information processing means for acquiring frequency specifying information associated with the azimuth information.

  In order to solve the above-described problem, according to another aspect of the present invention, an in-vehicle communication device that is a communication device mounted on a vehicle, and is installed at or around an intersection where a plurality of roads intersect. Corresponding information on the position of the intersection, which is the position of the intersection, from the installed communication device, the direction information indicating the direction based on the intersection, and the frequency specifying information which is the information specifying the frequency used for communication Receiving means for receiving the road information, positioning means for acquiring vehicle position information indicating the position of the vehicle, calculating the vehicle orientation based on the vehicle position indicated by the vehicle position information acquired by the positioning means, An in-vehicle communication device is provided that includes information processing means for searching for azimuth information indicating azimuth information received from the receiving means and acquiring frequency specifying information associated with the azimuth information. That.

  In order to solve the above-described problem, according to another aspect of the present invention, an in-vehicle communication device that is a communication device mounted on a vehicle, and is installed at or around an intersection where a plurality of roads intersect. Receiving means for receiving the intersection position information for identifying the intersection position that is the position of the intersection from the installed communication device, the direction information indicating the direction with respect to the intersection, and the frequency specification for identifying the frequency used for communication Road information storage means for storing road information associated with the information, own vehicle information acquisition means for acquiring vehicle position information indicating the position of the vehicle from the installed communication device, and vehicle position indicated by the vehicle position information Information processing means for calculating the direction of the vehicle, searching for direction information indicating the direction from the direction information stored by the road information storage means, and acquiring frequency specifying information associated with the direction information; Board communication device equipped with is provided.

  As described above, according to the present invention, it is possible to provide a technology capable of preventing traffic saturation at an intersection where a plurality of roads on which a vehicle travels intersect.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol. The description will be given in the following order.

1. 1. Outline of the present embodiment First Embodiment (Configuration of Installed Communication Device)
3. First embodiment (configuration of in-vehicle communication device)
4). First Embodiment (Operation of Installed Communication Device)
5). 1st Embodiment (operation | movement of a vehicle-mounted communication apparatus)
6). Second Embodiment (Configuration of Installed Communication Device)
7). Second embodiment (configuration of in-vehicle communication device)
8). Second Embodiment (Operation of Installed Communication Device)
9. 1st Embodiment (operation | movement of a vehicle-mounted communication apparatus)
10. Modification 1 of the second embodiment
11. Modification 2 of the second embodiment

[1. Outline of Embodiment]
FIG. 1 is a diagram for explaining the outline of the present embodiment. The outline of the present embodiment will be described with reference to FIG.

  In the present embodiment, the in-vehicle communication devices 20 (20A to 20E) installed in each of the vehicles C (C1 to C5) or the installed communication devices 10 incorporated in the relay terminal D are located at positions of the own vehicle at a predetermined cycle.・ Information such as speed is exchanged. A system is assumed in which information is exchanged to avoid collisions based on that information. The communication system 1 includes an installation communication device 10 and an in-vehicle communication device 20. The relay terminal D is installed at an intersection where a plurality of roads 30 (30A to 30E) intersect or around the intersection (for example, a place within 100 meters from the intersection). An example of the arrangement in the vehicle-related communication by the vehicle C (C1 to C5) and the relay terminal D is shown in FIG. The vehicles C (C1 to C5) and the relay terminal D are within the distance of line of sight, that is, within a communicable distance. Further, it is assumed that the vehicles C (C1 to C5) travel or stop on the road 30 (30A to 30E), respectively. At this time, assuming a safe driving support application at an intersection, it is assumed that each of the vehicles C (C1 to C5) enters the service area of the application and tries to determine a frequency channel to be used before transmission.

  In the example shown in FIG. 1, one relay terminal D is installed, but a plurality of relay terminals D may be installed. In the example shown in FIG. 1, for the sake of explanation, one vehicle C is arranged on each of the roads 30 </ b> A to 30 </ b> E. However, when there is a road 30 where the vehicle C does not exist, This system works even when there are a plurality of devices at ˜30E. As described above, vehicle-related communication is performed after the arrangement or communication availability is defined.

  FIG. 2 is a diagram illustrating a data configuration of road information according to the first embodiment. With reference to FIG. 2 (refer to FIG. 1 as appropriate), the structure of the data structure of the road information according to the first embodiment will be described.

  As shown in FIG. 2, the road information 120 includes azimuth information 120a and frequency specifying information 120b.

  The azimuth information 120a indicates the rotation angle in the counterclockwise direction when the direction on the right side of FIG. Here, when the rotation angle is R °, 10 ≦ R <65, 65 ≦ R <155, 155 ≦ R <255, 255 ≦ R <305, 305 ≦ R <370 are set as the orientation information 120a. When the azimuth information 120a is set in this way, each azimuth of the road 30 (30A to 30E) with respect to the antenna 40 is classified into different azimuth information 120a. The method of setting the azimuth information 120a is not limited to this. For example, in this case, the direction information 120a is set to 0 ° on the right side in FIG. 1, but any direction may be set to 0 °. Here, the azimuth information 120a is the rotation angle in the counterclockwise direction, but may be the rotation angle in the clockwise direction.

  The frequency specifying information 120b indicates information for specifying the frequency used by the in-vehicle communication device 20 for communication. Here, 1 to 5 is assigned as the frequency specifying information 120b to each of the azimuth information 120a. In this way, if different frequency specifying information 120b is assigned to each of the azimuth information 120a, communication is performed between the in-vehicle communication devices 20 of the vehicles C traveling on different roads 30 using different frequencies. be able to.

  Hereinafter, in 1st Embodiment, the installation communication apparatus 10 shall determine the frequency which the vehicle-mounted communication apparatus 20 uses for communication. Moreover, in 2nd Embodiment, the vehicle-mounted communication apparatus 20 shall determine the frequency which the vehicle-mounted communication apparatus 20 uses for communication.

[2. First Embodiment (Configuration of Installed Communication Device)]

  FIG. 3 is a diagram illustrating a configuration of the installation communication device according to the first embodiment. With reference to FIG. 3 (refer to FIG. 1 and FIG. 2 as appropriate), the configuration of the installation communication apparatus according to the first embodiment will be described.

  As shown in FIG. 3, the installation communication device 10 includes a reception unit 11, a road information storage unit 12, an intersection position information storage unit 13, an information processing unit 14, a transmission information creation unit 15, and a transmission unit 16. The control means 17 is provided.

  The receiving means 11 receives a radio signal from the in-vehicle communication device 20 via the antenna 40 (see FIG. 1). The receiving means 11 is composed of, for example, an RF circuit and a receiving circuit.

  The intersection position information storage unit 13 stores intersection position information for specifying an intersection position that is the position of the intersection. For example, the intersection position information storage unit 13 has a function capable of positioning an intersection. For example, the intersection position information storage unit 13 may acquire the position information of the intersection by GPS (Global Positioning System).

  The road information storage unit 12 stores road information (see FIG. 2). The road information storage unit 12 includes, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), an HDD (Hard Disk Drive), and the like.

  The information processing means 14 calculates a vehicle position that is the position of the vehicle based on the radio signal received by the receiving means 11 and calculates the direction of the vehicle based on the vehicle position. Here, the information processing means 14 may use the azimuth of the vehicle position calculated on the basis of the intersection position specified by the intersection position information as the azimuth of the vehicle calculated based on the vehicle position. Further, the information processing means 14 may use, as the vehicle direction calculated based on the vehicle position, the direction indicated by the traveling direction vector that is the amount of change in the vehicle position over a predetermined time. The information processing means 14 calculates the azimuth of the vehicle at predetermined time intervals, for example.

  The information processing means 14 may use the vehicle position calculated from the radio wave intensity of the radio signal or the arrival time of the radio signal as the vehicle position. At this time, for example, the information processing means 14 calculates the vehicle position by combining the information on the radio field intensity of the radio signal received by each of the plurality of antennas 40 (see FIG. 1) or the arrival time of the radio signal. Also good.

  The information processing means 14 retrieves the azimuth information indicating the calculated azimuth from the azimuth information 120a (see FIG. 2) saved by the road information saving means 12. The information processing means 14 acquires the frequency specifying information 120b (see FIG. 2) associated with the searched azimuth information 120a (see FIG. 2).

  When the direction indicated by the traveling direction vector is used as the direction of the vehicle, for example, if the vehicle traveling direction vector indicates the direction approaching the intersection, the information processing means 14 searches the direction information. If the vehicle traveling direction vector indicates a direction away from the intersection, the direction information may not be searched. This is because a vehicle moving away from an intersection has a low risk of collision between vehicles and the like, and it is less necessary to assign a frequency to be used for communication. The information processing unit 14 is configured by, for example, a CPU (Central Processing Unit) and the like, and realizes its function by executing a program stored in a memory (not shown).

  The transmission information creation means 15 creates transmission information including the frequency specifying information 120b (see FIG. 2) acquired by the information processing means 14. The transmission information creating unit 15 includes, for example, a bit string indicating information from the installation communication device 10 in the transmission information. The transmission information creation means 15 is constituted by, for example, a CPU and realizes its function by executing a program stored in a memory (not shown).

  The transmission means 16 transmits the transmission information created by the transmission information creation means 15 to the in-vehicle communication device 20 as a radio signal via the antenna 40 (see FIG. 1). The transmission means 16 is comprised from RF circuit, a transmission circuit, etc., for example.

  The control unit 17 has a function of controlling operations of the receiving unit 11, the road information storing unit 12, the intersection position information storing unit 13, the information processing unit 14, the transmission information creating unit 15, the transmitting unit 16, and the like. The control means 17 is comprised by CPU etc., for example, The function is implement | achieved by running the program memorize | stored in the memory which is not shown in figure.

[3. First Embodiment (Configuration of In-vehicle Communication Device)]

  FIG. 4 is a diagram illustrating a configuration of the in-vehicle communication device according to the first embodiment. With reference to FIG. 4 (refer to FIGS. 1 to 3 as appropriate), the configuration of the in-vehicle communication device according to the first embodiment will be described.

  As shown in FIG. 4, the in-vehicle communication device 20 includes a receiving unit 21, an information processing unit 24, a transmission information creating unit 25, a transmitting unit 26, and a control unit 27.

  The receiving unit 21 receives a radio signal from the installation communication device 10 or another in-vehicle communication device 20. The receiving means 21 is composed of, for example, an antenna, an RF circuit, a receiving circuit, and the like.

  The information processing unit 24 determines whether the information output from the receiving unit 21 is information from the installed communication device 10. The information processing unit 24 is information from the installation communication device 10 when, for example, the information output from the reception unit 21 includes a bit string indicating that the information is from the installation communication device 10. Judge. If it is determined that the information is from the installed communication device 10, the frequency specifying information included in the information is acquired and transmitted to the other in-vehicle communication device 20 or the installed communication device 10 together with the transmission information creating means 25. Output to. When it is determined that the information is not information from the installed communication device 10, a normal driving support service is performed. The information processing means 24 is constituted by, for example, a CPU, and realizes its function by executing a program stored in a memory (not shown).

  The transmission information creating unit 25 generates transmission information including information to be transmitted to the other in-vehicle communication device 20 or the installation communication device 10. The transmission information creating unit 25 outputs the transmission information and the frequency specifying information output from the information processing unit 24 to the transmission unit 26. The transmission information creation means 25 is constituted by, for example, a CPU and realizes its function by executing a program stored in a memory (not shown).

  The transmitting unit 26 uses the frequency specified by the frequency specifying information output from the transmission information generating unit 25 to use the transmission information generated by the transmission information generating unit 25 as a radio signal as the installation communication device 10 or other in-vehicle communication. It is transmitted to the device 20. The transmission means 26 is comprised from an antenna, RF circuit, a receiving circuit etc., for example.

  The control unit 27 has a function of controlling operations of the reception unit 21, the information processing unit 24, the transmission information creation unit 25, the transmission unit 26, and the like. The control means 27 is constituted by, for example, a CPU or the like, and realizes its function by executing a program stored in a memory (not shown).

  According to the configuration described above, the installed communication device 10 can transmit reference information for frequency allocation according to the direction of the road for each intersection where a plurality of roads intersect. Each vehicle that has received the information can autonomously select a transmission frequency channel, and traffic for each channel can be suppressed as a whole system, and the system can be stabilized.

[4. First Embodiment (Operation of Installed Communication Device)]

  FIG. 5 is a diagram illustrating the operation of the installation communication device according to the first embodiment. With reference to FIG. 5 (refer to FIGS. 1 to 4 as appropriate), the operation of the installed communication apparatus according to the first embodiment will be described. In addition to the operations shown here, the installed communication device 10 also has a function of relaying information from the in-vehicle communication device 20 existing in the vicinity.

  As shown in FIG. 5, the information processing means 14 of the installation communication device 10 calculates the vehicle position that is the position of the vehicle based on the radio signal received by the receiving means 11, and calculates the direction of the vehicle based on the vehicle position. (Step S101). Subsequently, the information processing means 14 acquires frequency specifying information from the road information 120 based on the direction of the vehicle (step S102). The transmission information creation unit 15 creates transmission information including the frequency specifying information acquired by the information processing unit 14, and the transmission unit 16 transmits the transmission information (step S103). The information processing means 14 waits until a predetermined time has elapsed (step S104) and returns to step S101.

[5. First Embodiment (Operation of In-vehicle Communication Device)]

  FIG. 6 is a diagram illustrating the operation of the in-vehicle communication device according to the first embodiment. The operation of the in-vehicle communication device according to the first embodiment will be described with reference to FIG. 6 (refer to FIGS. 1 to 4 as appropriate).

  As shown in FIG. 6, the receiving means 21 of the in-vehicle communication device 20 receives information given by a radio signal (step S201). The information processing means 24 determines whether the information is information from the installation communication device 10 (step S202). If the information processing means 24 determines that the information is not information from the installed communication device 10 (“No” in step S202), it implements a normal safe driving support service (step S203).

  When the information processing unit 24 determines that the information is from the installed communication device 10 (“Yes” in step S202), the information processing unit 24 acquires frequency specifying information from the received information (step S204). The transmission information creating unit 25 generates transmission information including information to be transmitted to the other in-vehicle communication device 20 or the installation communication device 10, and the transmission unit 26 transmits using the frequency specified by the frequency specifying information. The transmission information created by the information creating means 25 is transmitted as a radio signal to the installed communication device 10 or other in-vehicle communication device 20 (step S205). When the control unit 27 determines that the user has ended the service by an operation such as turning off the car engine ("Yes" in step S206), the control unit 27 ends the process of the in-vehicle communication device 20. When it is determined that the user has not finished the service (“No” in step S206), the control unit 27 returns to step S201 and continues the processing of the in-vehicle communication device 20.

  Hereinafter, in the second embodiment, the in-vehicle communication device 20 itself determines the frequency that the in-vehicle communication device 20 uses for communication.

[6. Second Embodiment (Configuration of Installed Communication Device)]

  FIG. 7 is a diagram illustrating a configuration of the installation communication device according to the second embodiment. With reference to FIG. 7 (refer to FIG. 1 and FIG. 2 as appropriate), the configuration of the installation communication apparatus according to the second embodiment will be described.

  Similar to the first embodiment, the installation communication device 10 includes a receiving unit 11, a road information storage unit 12, an intersection position information storage unit 13, an information processing unit 14, a transmission information creation unit 15, and a transmission unit 16. And a control means 17. However, the functions of the first embodiment, the information processing means 14, the transmission information creation means 15, and the transmission means 16 are different. Hereinafter, functions of the information processing unit 14, the transmission information creation unit 15, and the transmission unit 16 in the second embodiment will be described as the information processing unit 14A, the transmission information creation unit 15A, and the transmission unit 16A.

  The information processing unit 14A calculates a vehicle position that is a vehicle position based on the radio signal received by the receiving unit 11.

  The transmission information creation means 15A creates transmission information including intersection position information, road information in which direction information and frequency identification information are associated, and vehicle position information indicating the vehicle position.

The transmission unit 16A transmits the transmission information created by the transmission information creation unit 15A to the in-vehicle communication device 20.
[7. Second Embodiment (Configuration of In-vehicle Communication Device)]

  FIG. 8 is a diagram illustrating a configuration of the in-vehicle communication device according to the second embodiment. With reference to FIG. 8 (refer to FIG. 1 and FIG. 2 as appropriate), the configuration of the in-vehicle communication device according to the second embodiment will be described.

  Similar to the first embodiment, the in-vehicle communication device 20 includes a receiving unit 21, an information processing unit 24, a transmission information creating unit 25, a transmitting unit 26, and a control unit 27. However, the functions of the receiving unit 21 and the information processing unit 24 are different from those of the first embodiment. In addition, the vehicle information obtaining means 28 is provided. Hereinafter, the functions of the vehicle information obtaining unit 28 will be described, and the functions of the receiving unit 21 and the information processing unit 24 will be described as the receiving unit 21A and the information processing unit 24A.

  The receiving means 21 </ b> A receives intersection position information and road information from the installation communication device 10.

  The own vehicle information acquisition means 28 acquires vehicle position information indicating the position of the vehicle from the installation communication device 10. In the case where the vehicle position information has already been acquired, the own vehicle information acquisition unit 28 sets a threshold for the difference from the already acquired vehicle position information, and the vehicle position information acquired from the installation communication device 10 has already been obtained. When the difference from the acquired vehicle position information exceeds the threshold, the already acquired vehicle information may be updated with the vehicle position information acquired from the installation communication device 10. In addition, the own vehicle information obtaining unit 28 may obtain information necessary for the safe driving support service and transmit the information necessary for the service to the information processing unit 24A.

  The information processing unit 24A calculates the direction of the vehicle based on the vehicle position. The information processing unit 24A searches the azimuth information indicating the calculated azimuth from the azimuth information received by the receiving unit 21A, and acquires the frequency specifying information associated with the azimuth information.

[8. Second Embodiment (Operation of Installed Communication Device)]

  FIG. 9 is a diagram illustrating the operation of the installation communication device according to the second embodiment. With reference to FIG. 9 (refer to other figures as appropriate), the operation of the installed communication apparatus according to the second embodiment will be described. In addition to the operations shown here, the installed communication device 10 also has a function of relaying information from the in-vehicle communication device 20 existing in the vicinity.

  As illustrated in FIG. 9, the information processing unit 14 </ b> A of the installation communication device 10 calculates a vehicle position that is a vehicle position based on the radio signal received by the receiving unit 11 (step S <b> 301). Subsequently, the transmission information creation means 15A includes transmission information including intersection position information, road information in which azimuth information and frequency identification information are associated, and vehicle position information indicating the vehicle position calculated by the information processing means 14A. Is created (step S302), and the transmission means 16 transmits the transmission information (step S303). The information processing unit 14A waits until a predetermined time has elapsed (step S304), and returns to step S301.

[9. First Embodiment (Operation of In-vehicle Communication Device)]

  FIG. 10 is a diagram illustrating the operation of the in-vehicle communication device according to the second embodiment. With reference to FIG. 10 (refer to other figures as appropriate), the operation of the in-vehicle communication device according to the second embodiment will be described.

  As shown in FIG. 10, the receiving means 21 of the in-vehicle communication device 20 receives information given as a radio signal (step S401). The information processing unit 24A determines whether the information is information from the installation communication device 10 (step S402). When the information processing unit 24A determines that the information is not information from the installed communication device 10 (“No” in step S402), the information processing unit 24A performs a normal safe driving support service (step S403).

  When the information processing unit 24A determines that the information is from the installed communication device 10 (“Yes” in step S402), the information processing unit 24A acquires intersection position information and road information from the received information (step S404). The own vehicle information acquisition means 28 acquires vehicle position information indicating the position of the vehicle from the installation communication device 10 (step S405). The information processing unit 24A calculates the azimuth of the vehicle based on the vehicle position (step S406), and acquires frequency specifying information from the road information based on the azimuth of the vehicle (step S407). The transmission information creating unit 25 generates transmission information including information to be transmitted to the other in-vehicle communication device 20 or the installation communication device 10, and the transmission unit 26 transmits using the frequency specified by the frequency specifying information. The transmission information created by the information creation means 25 is transmitted as a radio signal to the installation communication device 10 or other in-vehicle communication device 20 (step S408). If the control unit 27 determines that the user has ended the service by an operation such as turning off the car engine ("Yes" in step S409), the control unit 27 ends the processing of the in-vehicle communication device 20. When it is determined that the user has not finished the service (“No” in step S409), the control unit 27 returns to step S401 and continues the processing of the in-vehicle communication device 20.

[10. Modification 1 of Second Embodiment]
Modification 1 of the second embodiment will be described. In the second embodiment, the installation communication device 10 transmits the vehicle position information to the in-vehicle communication device 20, but in the first modification of the second embodiment, the vehicle position information is not transmitted. In this case, the transmission information creation unit 15A of the installation communication device 10 creates transmission information including intersection position information and road information, and the transmission unit 16A transmits the transmission information. Then, the information processing unit 24A of the in-vehicle communication device 20 calculates the vehicle position that is the position of the vehicle based on the radio signal received by the receiving unit 21A, and calculates the direction of the vehicle based on the calculated vehicle position.

  Further, the installation communication device 10 may include positioning means for acquiring vehicle position information indicating the position of the vehicle. In this case, for example, the positioning means acquires the position information of the vehicle by GPS.

[11. Modification Example 2 of Second Embodiment]
A second modification of the second embodiment will be described. In the second embodiment, the installation communication device 10 transmits road information to the in-vehicle communication device 20, but in the second modification of the second embodiment, road information is not transmitted. In this case, the installation communication device 10 includes a road storage unit that stores road information, and the information processing unit 24A of the in-vehicle communication device 20 calculates the azimuth of the vehicle based on the calculated vehicle position. Is retrieved from the direction information stored by the road information storage means.

  In the above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

It is a figure explaining the outline | summary of this embodiment. It is a figure which shows the data structure of the road information which concerns on 1st Embodiment. It is a figure which shows the structure of the installation communication apparatus which concerns on 1st Embodiment. It is a figure which shows the structure of the vehicle-mounted communication apparatus which concerns on 1st Embodiment. It is a figure which shows operation | movement of the installation communication apparatus which concerns on 1st Embodiment. It is a figure which shows operation | movement of the vehicle-mounted communication apparatus which concerns on 1st Embodiment. It is a figure which shows the structure of the installation communication apparatus which concerns on 2nd Embodiment. It is a figure which shows the structure of the vehicle-mounted communication apparatus which concerns on 2nd Embodiment. It is a figure which shows operation | movement of the installation communication apparatus which concerns on 2nd Embodiment. It is a figure which shows operation | movement of the vehicle-mounted communication apparatus which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Communication system 10 Installation communication apparatus 11 Receiving means 12 Road information preservation | save means 13 Intersection position information preservation means 14 Information processing means 15 Transmission information preparation means 16 Transmission means 17 Control means 20 In-vehicle communication apparatus 21 Reception means 24 Information processing means 25 Transmission information Creation means 26 Transmission means 27 Control means 28 Own vehicle information obtaining means 30 Road 40 Antenna 120 Road information 120a Direction information 120b Frequency identification information C Vehicle D Relay terminal

Claims (15)

An installed communication device installed at or around an intersection where a plurality of roads intersect,
Receiving means for receiving a radio signal from an in-vehicle communication device which is a communication device mounted on a vehicle;
Intersection position information storage means for storing intersection position information specifying an intersection position that is the position of the intersection;
Road information storage means for storing road information in which direction information indicating the direction relative to the intersection is associated with frequency specifying information that is information specifying a frequency used for communication;
The road information storage means calculates the vehicle position, which is the position of the vehicle, based on the radio signal received by the receiving means, calculates the azimuth of the vehicle based on the vehicle position, and provides azimuth information indicating the azimuth. Information processing means for searching from the azimuth information to be stored and acquiring the frequency specifying information associated with the azimuth information;
Transmission information creating means for creating transmission information including the frequency specifying information acquired by the information processing means;
Transmitting means for transmitting the transmission information created by the transmission information creating means to the in-vehicle communication device;
An installation communication device comprising: The information processing means includes
2. The installation communication according to claim 1, wherein the direction of the vehicle position calculated based on the intersection position specified by the intersection position information is used as the direction of the vehicle calculated based on the vehicle position. apparatus. The information processing means includes
The installation communication apparatus according to claim 1, wherein a direction indicated by a traveling direction vector that is a change amount of the vehicle position at a predetermined time is used as a direction of the vehicle calculated based on the vehicle position. The information processing means includes
The vehicle position calculated from the radio wave intensity of the radio signal or the arrival time of the radio signal is used as the vehicle position calculated based on the radio signal received by the receiving unit. Installation communication equipment. An installed communication device installed at or around an intersection where a plurality of roads intersect,
Intersection position information storage means for storing intersection position information specifying an intersection position that is the position of the intersection;
Road information storage means for storing road information in which direction information indicating the direction relative to the intersection is associated with frequency specifying information that is information specifying a frequency used for communication;
Information processing means for calculating a vehicle position indicating the position of the vehicle based on the radio signal received by the receiving means;
Transmission information creating means for creating transmission information including the intersection position information, road information in which the direction information and the frequency specifying information are associated, and vehicle position information indicating the vehicle position;
Transmitting means for transmitting the transmission information created by the transmission information creating means to the in-vehicle communication device;
An installation communication device comprising: An installed communication device installed at or around an intersection where a plurality of roads intersect,
Intersection position information storage means for storing intersection position information specifying an intersection position that is the position of the intersection;
Road information storage means for storing road information in which direction information indicating the direction relative to the intersection is associated with frequency specifying information that is information specifying a frequency used for communication;
Transmission information creating means for creating transmission information including the intersection position information, and road information in which the direction information and the frequency specifying information are associated with each other;
Transmitting means for transmitting the transmission information created by the transmission information creating means to the in-vehicle communication device;
An installation communication device comprising: An installed communication device installed at or around an intersection where a plurality of roads intersect,
Intersection position information storage means for storing intersection position information specifying an intersection position that is the position of the intersection;
Transmission information creating means for creating transmission information including the intersection position information;
Transmitting means for transmitting the transmission information created by the transmission information creating means to the in-vehicle communication device;
An installation communication device comprising: An in-vehicle communication device that is a communication device mounted on a vehicle,
From an installed communication device installed at or around an intersection where a plurality of roads intersect, intersection position information for identifying the position of the intersection that is the position of the intersection, and azimuth information indicating a direction based on the intersection Receiving means for receiving road information associated with frequency specifying information that is information for specifying a frequency to be used;
Own vehicle information obtaining means for obtaining vehicle position information indicating the position of the vehicle from the installation communication device;
Information for calculating the azimuth of the vehicle based on the vehicle position, searching for azimuth information indicating the azimuth from the azimuth information received by the receiving means, and acquiring the frequency specifying information associated with the azimuth information Processing means;
An in-vehicle communication device comprising: An in-vehicle communication device that is a communication device mounted on a vehicle,
Intersection position information for identifying a position of the intersection that receives a radio signal from an intersection where a plurality of roads intersect or an installed communication device installed around the intersection, and an orientation based on the intersection Receiving means for receiving road information associating azimuth information indicating information and frequency specifying information that is information specifying a frequency used for communication;
The vehicle position, which is the position of the vehicle, is calculated based on the wireless signal received by the receiving means, the vehicle orientation is calculated based on the vehicle position, and the orientation information indicating the orientation is received by the receiving means. Information processing means for searching from the azimuth information and acquiring the frequency specifying information associated with the azimuth information;
An in-vehicle communication device comprising: An in-vehicle communication device that is a communication device mounted on a vehicle,
From an installed communication device installed at or around an intersection where a plurality of roads intersect, intersection position information for identifying the position of the intersection that is the position of the intersection, and azimuth information indicating a direction based on the intersection Receiving means for receiving road information associated with frequency specifying information that is information for specifying a frequency to be used;
Positioning means for acquiring vehicle position information indicating the position of the vehicle;
Calculates the direction of the vehicle based on the vehicle position indicated by the vehicle position information acquired by the positioning unit, searches the direction information indicating the direction from the direction information received by the receiving unit, and corresponds to the direction information Information processing means for acquiring the frequency identification information attached;
An in-vehicle communication device comprising: An in-vehicle communication device that is a communication device mounted on a vehicle,
Receiving means for receiving intersection position information for specifying an intersection position, which is the position of the intersection, from an intersection where a plurality of roads intersect or an installed communication device installed around the intersection;
Road information storage means for storing road information in which direction information indicating the direction relative to the intersection is associated with frequency specifying information that is information specifying a frequency used for communication;
Own vehicle information obtaining means for obtaining vehicle position information indicating the position of the vehicle from the installation communication device;
The direction of the vehicle is calculated based on the vehicle position indicated by the vehicle position information, the direction information indicating the direction is searched from the direction information stored by the road information storage means, and the direction information is associated with the direction information. Information processing means for acquiring frequency specifying information;
An in-vehicle communication device comprising: A communication system comprising an installation communication device installed at an intersection where a plurality of roads intersect or around the intersection, and an in-vehicle communication device which is a communication device mounted on a vehicle,
The installed communication device is:
Receiving means for receiving a radio signal from the in-vehicle communication device;
Intersection position information storage means for storing intersection position information specifying an intersection position that is the position of the intersection;
Road information storage means for storing road information in which direction information indicating the direction relative to the intersection is associated with frequency specifying information that is information specifying a frequency used for communication;
The road information storage means calculates the vehicle position, which is the position of the vehicle, based on the radio signal received by the receiving means, calculates the direction of the vehicle based on the vehicle position, and provides direction information indicating the direction. Information processing means for searching from the azimuth information to be stored and acquiring the frequency specifying information associated with the azimuth information;
Transmission information creating means for creating transmission information including the frequency specifying information acquired by the information processing means;
Transmitting means for transmitting the transmission information created by the transmission information creating means to the in-vehicle communication device;
Have
The in-vehicle communication device is
Receiving means for receiving the transmission information from the installed communication device;
Transmitting means for transmitting information using a frequency specified by the frequency specifying information included in the transmission information received by the receiving means;
A communication system comprising: A communication system comprising an installation communication device installed at an intersection where a plurality of roads intersect or around the intersection, and an in-vehicle communication device which is a communication device mounted on a vehicle,
The installed communication device is:
Intersection position information storage means for storing intersection position information specifying an intersection position that is the position of the intersection;
Road information storage means for storing road information in which direction information indicating the direction relative to the intersection is associated with frequency specifying information that is information specifying a frequency used for communication;
Information processing means for calculating a vehicle position indicating the position of the vehicle based on the radio signal received by the receiving means;
Transmission information creating means for creating transmission information including the intersection position information, road information in which the direction information and the frequency specifying information are associated, and vehicle position information indicating the vehicle position;
Transmitting means for transmitting the transmission information created by the transmission information creating means to the in-vehicle communication device;
Have
The in-vehicle communication device is
Receiving means for receiving the transmission information from the installed communication device;
Own vehicle information obtaining means for obtaining vehicle position information indicating the position of the vehicle from the installation communication device;
Information for calculating the azimuth of the vehicle based on the vehicle position, searching for azimuth information indicating the azimuth from the azimuth information received by the receiving means, and acquiring the frequency specifying information associated with the azimuth information Processing means;
Transmitting means for transmitting information using a frequency specified by the frequency specifying information acquired by the information processing means;
A communication system comprising: A communication system comprising an installation communication device installed at an intersection where a plurality of roads intersect or around the intersection, and an in-vehicle communication device which is a communication device mounted on a vehicle,
The installed communication device is:
Intersection position information storage means for storing intersection position information specifying an intersection position that is the position of the intersection;
Road information storage means for storing road information in which direction information indicating the direction relative to the intersection is associated with frequency specifying information that is information specifying a frequency used for communication;
Transmission information creating means for creating transmission information including the intersection position information, and road information in which the direction information and the frequency specifying information are associated with each other;
Transmitting means for transmitting the transmission information created by the transmission information creating means to the in-vehicle communication device;
Have
The in-vehicle communication device is
Receiving means for receiving a radio signal from the installed communication device and receiving the transmission information;
The vehicle position, which is the position of the vehicle, is calculated based on the wireless signal received by the receiving means, the vehicle orientation is calculated based on the vehicle position, and the orientation information indicating the orientation is received by the receiving means. Information processing means for searching from the azimuth information and acquiring the frequency specifying information associated with the azimuth information;
Transmitting means for transmitting information using a frequency specified by the frequency specifying information acquired by the information processing means;
A communication system comprising: A communication system comprising an installation communication device installed at an intersection where a plurality of roads intersect or around the intersection, and an in-vehicle communication device which is a communication device mounted on a vehicle,
The installed communication device is:
Intersection position information storage means for storing intersection position information specifying an intersection position that is the position of the intersection;
Transmission information creating means for creating transmission information including the intersection position information;
Transmitting means for transmitting the transmission information created by the transmission information creating means to the in-vehicle communication device;
Have
The in-vehicle communication device is
Receiving means for receiving intersection position information for specifying an intersection position that is the position of the intersection from the installation communication device;
Road information storage means for storing road information in which direction information indicating the direction relative to the intersection is associated with frequency specifying information that is information specifying a frequency used for communication;
Own vehicle information obtaining means for obtaining vehicle position information indicating the position of the vehicle from the installation communication device;
The direction of the vehicle is calculated based on the vehicle position indicated by the vehicle position information, the direction information indicating the direction is searched from the direction information stored by the road information storage means, and the direction information is associated with the direction information. Information processing means for acquiring frequency specifying information;
Transmitting means for transmitting information using a frequency specified by the frequency specifying information acquired by the information processing means;
A communication system comprising:

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