JP2016126602A - On-vehicle communication machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle communication machine capable of surely sending positional information of an object device to a management center.SOLUTION: An on-vehicle communication machine 3 comprises a radio communication part for communicating with another communication machine by radio communication, a storage part, and a control part. The storage part stores a search database and a detection database. The control part of the on-vehicle communication machine 3 creates detection information containing positional information on the basis of device information when receiving the device information from a pedestrian terminal which is a search object and which has been registered in the search database, and then registers the created detection information in the detection database. The control part of the on-vehicle communication machine 3 sends the detection information registered in the detection database to a road side communication machine 2 via the radio communication part, when receiving the device information from the road side communication machine 2 installed on the road side, via the radio communication part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an in-vehicle communication device that communicates with a roadside communication device.

  A vehicle detection device that detects a search target vehicle based on vehicle number information of a search target vehicle transmitted from an information center is known (for example, Patent Document 1). In this vehicle detection device, the vehicle numbers of surrounding vehicles are detected from an image taken by the in-vehicle camera. And if the vehicle number of the detected surrounding vehicle is in the vehicle number list based on the vehicle number information of the search target vehicle received from the information center, the vehicle number is stored as the vehicle number data together with the date and time information as the vehicle number data. It is transmitted to the information center via the station.

JP 2008-140128 A

  In Patent Document 1, when a search target vehicle is detected, if there is no wireless base station around the vehicle detection device, the vehicle number data is stored in the information center even if vehicle number data is transmitted from the vehicle detection device. Not offered to. For this reason, the position information of the search target vehicle cannot be reliably provided to the information center.

  In view of this problem, an object of the present invention is to provide an in-vehicle communication device that can reliably transmit position information of a target device to a management center.

  The vehicle-mounted communication apparatus which concerns on the main aspect of this invention is provided with the communication part which communicates with another communication apparatus by radio | wireless, the memory | storage part, and a control part. The control unit determines whether or not the other communication device corresponds to the search target based on the reception information received from the other communication device via the communication unit, and corresponds to the search target , Based on the fact that the discovery information including at least the location information indicating the location of the other communication device is registered in the storage unit, and the information is received from the roadside communication device installed on the roadside via the communication unit, The discovery information registered in the storage unit is transmitted to the roadside communication device via the communication unit.

  The vehicle-mounted communication apparatus which concerns on this aspect transmits the discovery information containing the positional information which shows the location of another communication apparatus to a roadside communication apparatus, when information is received from a roadside communication apparatus. Therefore, according to the vehicle-mounted communication apparatus which concerns on this aspect, the discovery information containing a positional information can be reliably transmitted with respect to the management center connected so that communication with the roadside communication apparatus was possible via a roadside communication apparatus. In addition, when there is no roadside communication device around the vehicle-mounted communication device, the vehicle-mounted communication device does not continue to transmit discovery information. For this reason, useless transmission can be suppressed and discovery information can be efficiently transmitted to the management center via the roadside communication device.

  In the in-vehicle communication device according to this aspect, when the distance between the in-vehicle communication device and the roadside communication device is smaller than a predetermined value, the control unit displays the discovery information registered in the storage unit as the communication unit. Via the roadside communication device. In this way, when the in-vehicle communication device can reliably transmit to the roadside communication device, the registered discovery information will be transmitted to the roadside communication device. Can be sent.

  Alternatively, in the in-vehicle communication device according to this aspect, when the strength of the signal received from the roadside communication device is larger than a predetermined value, the control unit displays the discovery information registered in the storage unit as the communication unit. Via the roadside communication device. In this case as well, when the in-vehicle communication device can reliably transmit to the roadside communication device, the registered discovery information will be transmitted to the roadside communication device, so it is possible to suppress unnecessary transmission and ensure the discovery information. Can be sent.

  In the in-vehicle communication device according to this aspect, the storage unit stores identification information of a pedestrian terminal device as information indicating the search target, and the control unit receives the reception information received via the communication unit, When the identification information of the search target pedestrian terminal device is included, the discovery information may be registered in the storage unit. If it carries out like this, the discovery information regarding the pedestrian terminal device of search object will be transmitted to a roadside communication apparatus via a communication part, after registering in a memory | storage part. Therefore, by using the position information included in the discovery information collected via the roadside communication device, a person who carries the pedestrian terminal device and whose location is unknown (for example, an elderly person or a child who is lost) can be quickly You can search for it.

  In this case, when the reception unit receives the reception information directly from the search target pedestrian terminal device via the communication unit, the control unit transmits the discovery information to the surroundings via the communication unit. Can be done. If it carries out like this, the discovery information regarding the pedestrian terminal device of search object will be transmitted to a wide range by a vehicle-mounted communication apparatus instead of a pedestrian terminal device. Therefore, the discovery information regarding the pedestrian terminal device to be searched is easily transmitted to the roadside communication device quickly.

  In the in-vehicle communication device according to this aspect, the storage unit stores identification information of the in-vehicle communication device as information indicating the search target, and the control unit includes the reception information received via the communication unit in the received information. When the identification information of the in-vehicle communication device to be searched is included, the discovery information may be registered in the storage unit. If it carries out like this, the discovery information regarding the vehicle-mounted communication apparatus of search object will be transmitted to a roadside communication apparatus via a communication part, after registering in a memory | storage part. Therefore, using the location information included in the discovery information collected via the roadside communication device, the vehicle to be searched (for example, a stolen vehicle or an accident vehicle) where the location is unknown and the vehicle-mounted communication device is mounted, You can search quickly.

  In the in-vehicle communication device according to this aspect, when the control unit receives information indicating the search target from a central device that controls a traffic system, the control unit displays the received information indicating the search target at a predetermined timing. It can be set as the structure transmitted to the circumference | surroundings via. In this case, the information indicating the search target transmitted from the central device (management center) that supervises the traffic system is transmitted over a wide range, so that the search range can be expanded.

  In the in-vehicle communication device according to this aspect, the search target is a communication device mounted on a failed vehicle, and the control unit includes information indicating the failed vehicle in the reception information received via the communication unit. If found, the discovery information may be registered in the storage unit. If it carries out like this, the discovery information regarding the communication apparatus mounted in the broken vehicle will be transmitted to a roadside communication apparatus via a communication part, after registering in a memory | storage part. Accordingly, the position information included in the discovery information collected via the roadside communication device can identify the position of the vehicle on which the communication device is mounted and cannot move due to the failure, so that the failed vehicle can be repaired quickly.

  As described above, according to the present invention, it is possible to provide an in-vehicle communication device that can reliably transmit position information of a target device to a management center.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the embodiment described below is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

It is the conceptual diagram which shows the structure explaining the outline | summary of ITS which concerns on Embodiment 1, and apparatus information. It is the conceptual diagram which shows the structure explaining the procedure and the search information which search the person whose location which becomes unknown concerning Embodiment 1 becomes unknown. It is the conceptual diagram which shows the figure explaining the procedure which searches the person whose location became unknown concerning Embodiment 1, and the structure of discovery information. It is a figure explaining the procedure which searches the person whose location which becomes unknown concerning Embodiment 1 becomes unknown. It is a block diagram which shows the structure of the roadside communication apparatus which concerns on Embodiment 1, an in-vehicle communication apparatus, and a pedestrian terminal device. 5 is a flowchart showing search information registration and transmission processing according to the first embodiment and search information deadline management processing. 5 is a flowchart showing discovery information generation, registration, and transmission processing according to the first embodiment, and a flowchart showing discovery information registration and transmission processing; 5 is a flowchart showing discovery information transmission and deletion processing according to the first embodiment, and a flowchart showing discovery information expiration management processing. It is a figure which shows the flow until it acquires the position of the pedestrian terminal device of search object which concerns on Embodiment 1. FIG. It is a figure explaining the procedure which acquires the position of the vehicle which became immovable by the failure which concerns on Embodiment 2, the conceptual diagram which shows the structure of apparatus information, and the conceptual diagram which shows the structure of discovery information. 5 is a flowchart showing discovery information generation, registration, and transmission processing according to the second embodiment, and a flowchart showing discovery information registration and transmission processing;

  Embodiments 1 and 2 of the present invention will be described below with reference to the drawings.

<Embodiment 1>
Embodiment 1 uses ITS (Intelligent Transport System) to acquire the position of a pedestrian terminal device carried by a person whose location is unknown, and is useful for searching for a person whose location is unknown.

  An overview of ITS will be described with reference to FIG.

  The ITS of Embodiment 1 includes a management center 1, a plurality of roadside communication devices 2 installed on the roadside, an in-vehicle communication device 3 mounted on a vehicle, and a pedestrian terminal device 4 carried by a pedestrian. Become. The management center 1 is connected to a plurality of roadside communication devices 2 via a communication network, and supervises the traffic system. The roadside communication device 2, the in-vehicle communication device 3, and the pedestrian terminal device 4 communicate with each other wirelessly. The roadside communication device 2, the in-vehicle communication device 3, and the pedestrian terminal device 4 transmit device information at predetermined time intervals. The transmission of the device information by the roadside communication device 2 is performed once or a plurality of times during a time interval of 100 ms. The transmission of device information by the in-vehicle communication device 3 and the pedestrian terminal device 4 is performed once during a time interval of 100 ms.

  As shown in FIG. 1B, the device information includes a type, an ID, and a position. In the type of the device information, information indicating whether the transmitting device is the roadside communication device 2, the in-vehicle communication device 3, or the pedestrian terminal device 4 is stored. In the device information ID, a unique ID assigned to the device to be transmitted is stored. Fixed position information of the roadside communication device 2 is stored in the position of the device information transmitted by the roadside communication device 2, and is transmitted to the position of device information transmitted by the in-vehicle communication device 3 and the pedestrian terminal device 4. The latest position information of the device is stored.

  The roadside communication device 2 can grasp traffic conditions and the like by receiving device information from other devices. The in-vehicle communication device 3 receives the device information from the pedestrian terminal device 4, thereby grasping the distance between the vehicle and the pedestrian and notifying the driver that there is a possibility of contacting the pedestrian. can do. The pedestrian terminal device 4 receives the device information from the in-vehicle communication device 3 to grasp the distance between the pedestrian and the vehicle, and for the pedestrian carrying the possibility of contacting the vehicle. Can be notified.

  Next, a procedure for searching for a person whose location is unknown will be described with reference to FIGS.

  Referring to FIG. 2A, upon receiving a person search request, the police or the like notifies the management center 1 of the ID of the pedestrian terminal device 4 carried by the person who is the search target. The management center 1 generates search information including the ID of the search target pedestrian terminal device 4 in response to a report from the police or the like.

  As shown in FIG. 2B, the search information includes a type, an ID, the number of hops, and a time limit. Since the search target of Embodiment 1 is the pedestrian terminal device 4, information indicating the pedestrian terminal device 4 is stored in the type of search information. In the ID of the search information, the ID of the search target pedestrian terminal device 4 is stored. In the search information hopping number, the number of times (for example, 2) to be transferred by the in-vehicle communication device 3 is stored. The search information deadline stores the date and time of the deadline for holding the search information (the deadline for searching for the pedestrian terminal device 4 to be searched) (for example, one month after the search information generation date and time).

  The management center 1 transmits the generated search information to the plurality of roadside communication devices 2 via the communication network. The roadside communication device 2 that has received the search information from the management center 1 transmits the search information to the surroundings. The in-vehicle communication device 3 that has received the search information from the roadside communication device 2 transmits the search information to the surroundings at a predetermined timing. The in-vehicle communication device 3 that has received the search information from the other in-vehicle communication device 3 transmits the search information to the surroundings at a predetermined timing. As shown in FIG. 2A, the search information transmitted from the roadside communication device 2 is received by the in-vehicle communication device 3 with ID = 1, and the search information transmitted from the in-vehicle communication device 3 with ID = 1 is The search information received by the in-vehicle communication device 3 with ID = 2 and transmitted from the in-vehicle communication device 3 with ID = 2 is received by the in-vehicle communication device 3 with ID = 3. Here, since the initial value of the hopping number is set to 2, the in-vehicle communication device 3 with ID = 3 does not transmit search information to the surroundings.

  With reference to Fig.3 (a), the pedestrian terminal device 4 which the person of search object carries has transmitted apparatus information to the circumference | surroundings as mentioned above. When the in-vehicle communication device 3 with ID = 4 that holds the search information receives device information from the pedestrian terminal device 4 to be searched, it generates discovery information.

  As shown in FIG. 3B, the discovery information includes a type, an ID, a position, a date, a hopping number, and a time limit. The type and ID similar to the search information, that is, the type and ID of the search target pedestrian terminal device 4 are stored in the type and ID of the discovery information. In the position of the discovery information, the position information included in the device information received from the search target pedestrian terminal device 4 is stored. The discovery information generation date is stored as the discovery information generation date. In the hopping number of discovery information, the number of times (for example, 1) to be transferred by the in-vehicle communication device 3 is stored. In the deadline of the discovery information, the deadline of the search information related to the pedestrian terminal device 4 is stored as the date and time of the deadline for holding the discovery information.

  The in-vehicle communication device 3 with ID = 4 that generates the discovery information immediately transmits the discovery information to the surroundings after the discovery information is generated. The in-vehicle communication device 3 that has received the discovery information from the other in-vehicle communication device 3 transmits the discovery information to the surroundings at a predetermined timing. As shown in FIG. 3A, the discovery information transmitted from the in-vehicle communication device 3 with ID = 4 is received by the in-vehicle communication device 3 with ID = 5 and transmitted from the in-vehicle communication device 3 with ID = 5. The discovery information is received by the in-vehicle communication device 3 with ID = 6. Here, since the initial value of the hopping number is set to 1, the in-vehicle communication device 3 with ID = 6 does not transmit discovery information to the surroundings.

  With reference to FIG. 4, the roadside communication device 2 transmits device information to the surroundings as described above. When the in-vehicle communication device 3 with ID = 7 that holds the discovery information receives the device information from the roadside communication device 2, the distance between the in-vehicle communication device 3 and the roadside communication device 2 is smaller than R, in other words, the in-vehicle communication. When the roadside communication device 2 enters the circle of radius R centering on the device 3, discovery information is transmitted to the surroundings. Here, R is set to a value smaller than the communicable distance of the in-vehicle communication device 3.

  The roadside communication device 2 that has received the discovery information from the in-vehicle communication device 3 transmits the discovery information to the management center 1 via the communication network. In addition, also when the roadside communication apparatus 2 receives apparatus information directly from the search target pedestrian terminal apparatus 4, discovery information is similarly transmitted to the management center 1 via a communication network. The management center 1 reports the type, ID, position, date and time included in the discovery information received from the roadside communication device 2 to the police and the like. Thereby, the police etc. can search for the person to be searched smoothly.

  FIG. 5A is a block diagram illustrating a configuration of the roadside communication device 2.

  The roadside communication device 2 includes a control unit 21, a storage unit 22, a wired communication unit 23, and a wireless communication unit 24. The control unit 21 receives a signal from each unit of the roadside communication device 2 and controls each unit of the roadside communication device 2. The storage unit 22 stores an ID unique to the roadside communication device 2, fixed position information of the roadside communication device 2, a program executed by the control unit 21, and various data.

  The wired communication unit 23 performs wired communication with the management center 1. The control unit 21 receives search information from the management center 1 via the wired communication unit 23 and transmits discovery information to the management center 1. The wireless communication unit 24 performs wireless communication with surrounding devices. The control unit 21 transmits device information and search information to other devices via the wireless communication unit 24. Transmission by the wireless communication unit 24 is performed by broadcasting. Further, the control unit 21 receives device information and discovery information from other devices via the wireless communication unit 24.

  FIG. 5B is a block diagram showing the configuration of the in-vehicle communication device 3.

  The in-vehicle communication device 3 includes a control unit 31, a position acquisition unit 32, a storage unit 33, an input / output unit 34, and a wireless communication unit 35. The control unit 31 receives signals from each unit of the in-vehicle communication device 3 and controls each unit of the in-vehicle communication device 3. The position acquisition unit 32 acquires latitude, longitude, and altitude information as the position information of the in-vehicle communication device 3 based on the GPS system. The storage unit 33 stores an ID unique to the in-vehicle communication device 3, a program executed by the control unit 31, and various data. The storage unit 33 stores a search database and a discovery database, which will be described later. The input / output unit 34 includes buttons and a touch panel for receiving input from the user, and a display for displaying character information and graphic information.

  The wireless communication unit 35 performs wireless communication with surrounding devices. The control unit 31 transmits device information, search information, and discovery information via the wireless communication unit 35. Transmission by the wireless communication unit 35 is performed by broadcasting. Further, the control unit 31 receives device information, search information, and discovery information from other devices via the wireless communication unit 35.

  FIG. 5C is a block diagram illustrating a configuration of the pedestrian terminal device 4.

  The pedestrian terminal device 4 includes a control unit 41, a position acquisition unit 42, a storage unit 43, an input / output unit 44, and a wireless communication unit 45. The control unit 41 receives signals from each unit of the pedestrian terminal device 4 and controls each unit of the pedestrian terminal device 4. The position acquisition unit 42 acquires latitude, longitude, and altitude information as the position information of the pedestrian terminal device 4 based on the GPS system. The storage unit 43 stores an ID unique to the pedestrian terminal device 4, a program executed by the control unit 41, and various data. The input / output unit 44 includes a button and a touch panel for receiving input from the user, and a display for displaying character information and graphic information.

  The wireless communication unit 45 performs wireless communication with surrounding devices. The control unit 41 transmits device information via the wireless communication unit 45. Transmission by the wireless communication unit 45 is performed by broadcasting. Further, the control unit 41 receives device information from another device via the wireless communication unit 45.

  Next, processing by the in-vehicle communication device 3 will be described with reference to the flowcharts of FIGS. 6 (a) to 8 (b).

  FIG. 6A is a flowchart showing search information registration and transmission processing.

  When the control unit 31 of the in-vehicle communication device 3 receives the search information from the roadside communication device 2 or another in-vehicle communication device 3 (S11: YES), the received search information is stored in the storage unit 33 of the in-vehicle communication device 3. It is determined whether or not it is registered in the searched search database (S12). Specifically, the control unit 31 refers to the search database and determines whether there is search information that matches the type and ID of the received search information. If the received search information is not registered in the search database (S12: NO), the control unit 31 registers the received search information in the search database (S13). The search information registered in the search database has a type, an ID, and a time limit.

  Subsequently, when the hopping number of the received search information is greater than 0 (S14: YES), the control unit 31 reduces the hopping number of the received search information by 1, and transmits this search information to the surroundings after a predetermined time. (S15). The predetermined time is set to 10 minutes, for example. The reason why the control unit 31 does not transmit the search information immediately after receiving the search information but transmits the search information after a predetermined time is that the surrounding traffic situation has changed, and more other in-vehicle communication devices This is because the data can be transferred to 3. Therefore, in S15, instead of transmitting the search information after a predetermined time, the search information may be transmitted after the in-vehicle communication device 3 has moved a predetermined distance. On the other hand, when the hopping number of the received search information is 0 (S14: NO), the process returns to S11 without performing the process of S15.

  FIG. 6B is a flowchart showing search information time limit management processing.

  The control unit 31 refers to the search database to determine whether or not there is search information that has passed the deadline, that is, whether or not there is search information whose current date and time has passed (S21). If there is search information that has passed the time limit (S21: YES), the control unit 31 deletes the search information that has passed the time limit from the search database (S22), and returns the processing to S21. Thereby, it can suppress that the search information registered in the search database continues being transmitted even after the search is terminated. When the search period is extended, search information is transmitted again from the management center 1.

  FIG. 7A is a flowchart showing discovery information generation, registration, and transmission processing.

  When receiving the device information from another device (S31: YES), the control unit 31 determines whether or not the device indicated by the received device information is registered in the search database (S32). Specifically, the control unit 31 refers to the search database and determines whether there is search information that matches the type and ID of the received device information. When the device indicated by the received device information is registered in the search database (S32: YES), the control unit 31 stores the device indicated by the received device information in the storage unit 33 of the in-vehicle communication device 3. It is determined whether it is registered in the discovery database (S33). Specifically, the control unit 31 refers to the discovery database and determines whether there is discovery information that matches the type and ID of the received device information.

  If the device indicated by the received device information is not registered in the discovery database (S33: NO), the control unit 31 generates discovery information based on the received device information (S34), and uses the generated discovery information as the discovery database. (S35). The discovery information registered in the discovery database has a type, an ID, a position, a date and time, and a time limit. Subsequently, the control unit 31 immediately transmits the generated discovery information to the surroundings (S36). On the other hand, when the device indicated by the received device information is registered in the discovery database (S33: YES), the processing returns to S31 without performing the processing of S34 to S36.

  FIG. 7B is a flowchart showing discovery information registration and transmission processing.

  When receiving the discovery information from the other in-vehicle communication device 3 (S41: YES), the control unit 31 determines whether or not the received discovery information is registered in the discovery database (S42). Specifically, the control unit 31 refers to the discovery database and determines whether there is discovery information that matches the type and ID of the received discovery information.

  If the received discovery information is not registered in the discovery database (S42: NO), the control unit 31 registers the received discovery information in the discovery database as in S35 of FIG. 7A (S43). Subsequently, when the hopping number of the received discovery information is greater than 0 (S44: YES), the control unit 31 subtracts 1 from the hopping number of the received discovery information and transmits the discovery information to the surroundings after a predetermined time. (S45). The predetermined time is set to 10 minutes, for example. Instead of transmitting the discovery information after a predetermined time, the discovery information may be transmitted after the in-vehicle communication device 3 has moved a predetermined distance. On the other hand, when the hopping number of the received discovery information is 0 (S44: NO), the process returns to S41 without performing the process of S45.

  FIG. 8A is a flowchart showing discovery information transmission and deletion processing.

  When receiving the device information from the roadside communication device 2 (S51: YES), the control unit 31 determines whether the distance between the in-vehicle communication device 3 and the roadside communication device 2 is smaller than R (S52). Specifically, the control unit 31 calculates the distance between the in-vehicle communication device 3 and the roadside communication device 2 based on the position of the in-vehicle communication device 3 and the position included in the received device information. It is determined whether the measured distance is smaller than R.

  When the distance between the in-vehicle communication device 3 and the roadside communication device 2 is smaller than R (S52: YES), the control unit 31 determines whether discovery information is registered in the discovery database (S53). When the discovery information is registered in the discovery database (S53: YES), the control unit 31 transmits all the registered discovery information to the surroundings (S54). Thereby, all the transmitted discovery information is received by the roadside communication device 2. Subsequently, the control unit 31 deletes all discovery information registered in the discovery database (S55), and returns the process to S51.

  FIG. 8B is a flowchart showing discovery information time limit management processing.

  The control unit 31 refers to the discovery database to determine whether there is discovery information whose deadline has passed, that is, whether there is discovery information whose current date has passed the deadline (S61). If there is discovery information whose deadline has passed (S61: YES), the control unit 31 deletes discovery information whose deadline has passed from the discovery database (S62), and returns the process to S61. Thereby, it can suppress that the discovery information registered in the discovery database continues being transmitted even after the search is terminated.

  FIGS. 9A to 9C are diagrams showing a flow until the position of the pedestrian terminal device 4 to be searched is acquired.

  Referring to FIG. 9A, the in-vehicle communication device 3 with ID = 1 receives the search information from the roadside communication device 2 within the communication range of the roadside communication device 2 with ID = 3, and the ID = 3. The vehicle is moving in the right direction away from the roadside communication device 2. Therefore, the search information received from the roadside communication device 2 with ID = 3 is registered in the search database of the in-vehicle communication device 3 with ID = 1. The type of the search information is information indicating the pedestrian terminal device 4, and the ID of the search information is 5. On the other hand, search information is not registered in the search database of the in-vehicle communication device 3 with ID = 2. A vehicle equipped with the in-vehicle communication device 3 with ID = 2 makes a left turn so as to approach the roadside communication device 2 with ID = 3, and makes a turn on the way to the vicinity of the roadside communication device 2 with ID = 4. By the way.

  Referring to FIG. 9B, the in-vehicle communication device 3 with ID = 1 proceeding in the right direction and the in-vehicle communication device 3 with ID = 2 proceeding in the left direction are different on the road. At this time, it is assumed that the search information is transmitted from the in-vehicle communication device 3 with ID = 1 at the timing when the passing is performed, and the transmitted search information is received by the in-vehicle communication device 3 with ID = 2. Thus, the search information is registered in the search database of the in-vehicle communication device 3 with ID = 2.

  Referring to FIG. 9 (c), a vehicle equipped with the in-vehicle communication device 3 with ID = 2 turns around the road and passes near the pedestrian terminal device 4 with ID = 5. The device information transmitted from 4 is received. Thereby, the discovery information regarding the pedestrian terminal device 4 with ID = 5 is registered in the discovery database of the in-vehicle communication device 3 with ID = 2. Thereafter, when the in-vehicle communication device 3 with ID = 2 advances to the vicinity of the roadside communication device 2 with ID = 4, discovery information is transmitted from the in-vehicle communication device 3 with ID = 2. Thereby, the roadside communication device 2 with ID = 4 receives the discovery information related to the pedestrian terminal device 4 with ID = 5, and transmits the received discovery information to the management center 1.

<Effect of Embodiment 1>
As mentioned above, according to Embodiment 1, the following effects are produced.

  When receiving the device information from the roadside communication device 2, the control unit 31 of the in-vehicle communication device 3 transmits the discovery information related to the search target pedestrian terminal device 4 to the roadside communication device 2. Therefore, the discovery information held by the in-vehicle communication device 3 can be reliably transmitted to the management center 1 via the roadside communication device 2. In addition, when there is no roadside communication device 2 around the vehicle-mounted communication device 3, the control unit 31 does not continue to transmit discovery information. For this reason, transmission of useless discovery information can be suppressed and discovery information can be efficiently transmitted to the management center 1 via the roadside communication device 2.

  When the distance between the in-vehicle communication device 3 and the roadside communication device 2 is smaller than R, the control unit 31 transmits the discovery information registered in the discovery database to the surroundings. R is set to a value smaller than the communicable distance of the in-vehicle communication device 3. Thereby, the control part 31 can transmit discovery information to the roadside communication apparatus 2 reliably, suppressing useless transmission.

  When the control unit 31 receives device information from the search target pedestrian terminal device 4 registered in the search database and the device indicated by the received device information is not registered in the discovery database, the control unit 31 adds the received device information to the received device information. Based on this, discovery information is generated, and the generated discovery information is registered in the discovery database. In addition, when receiving the discovery information, the control unit 31 registers the received discovery information in the discovery database if the received discovery information is not registered in the discovery database. Thereby, the control unit 31 can reliably transmit the discovery information to the roadside communication device 2 when receiving the device information from the roadside communication device 2. Further, by using the discovery information collected via the roadside communication device 2, a person who carries the pedestrian terminal device 4 to be searched and whose location is unknown (for example, an elderly person or a child who is lost) can be quickly You can search for it.

  When receiving the device information directly from the pedestrian terminal device 4 to be searched, the control unit 31 generates discovery information based on the received device information, and transmits the generated discovery information to the surroundings. Thereby, discovery information comes to be transmitted in a wide range by the vehicle-mounted communication device 3 instead of the pedestrian terminal device 4. Accordingly, the discovery information is easily transmitted to the roadside communication device 2 quickly.

  When receiving the search information, the control unit 31 transmits the received search information to the surroundings after a predetermined time. Thereby, since the search information is transmitted over a wide range, the search range can be expanded.

<Embodiment 2>
In the second embodiment, the position of the in-vehicle communication device 3 mounted on a vehicle that has become unable to move due to a failure is acquired by using ITS, which is useful for recovery of the vehicle in which the failure has occurred. In the second embodiment, a failed vehicle is a search target. In the second embodiment, as compared with the first embodiment, the search database stored in the storage unit 33 of the in-vehicle communication device 3 is omitted, and the processes shown in FIGS. 6A and 6B are omitted. Also, in the second embodiment, compared to the first embodiment, a part of the processing shown in FIGS. 7A and 7B is changed as will be described later, and the processing in FIGS. It is the same. Other configurations and processes are the same as those in the first embodiment.

  With reference to FIGS. 10A to 10C, a procedure for acquiring the position of the vehicle in which the failure has occurred in the second embodiment will be described.

  As shown in FIG. 10A, when a failure occurs in a vehicle on which the in-vehicle communication device 3 with ID = 1 is mounted, the control unit 31 of the in-vehicle communication device 3 with ID = 1 transmits to the surroundings in a normal state. Failure information indicating failure is added to the device information (see FIG. 1B). Thereafter, the device information shown in FIG. 10B is transmitted from the in-vehicle communication device 3 with ID = 1 to the surroundings. The failure information is added to the device information when the failure is detected by a failure detection mechanism installed in the vehicle, or when the vehicle driver fails through the input / output unit 34 of the in-vehicle communication device 3. It is done at the timing when it is input.

  When the control unit 31 of the in-vehicle communication device 3 with ID = 2 receives the device information including the failure information from the in-vehicle communication device 3 with ID = 1, the control unit 31 generates the discovery information illustrated in FIG. Similarly, the generated discovery information is registered in the discovery database and transmitted to the surroundings. The discovery information shown in FIG. 10C is added with failure information indicating failure as compared with the discovery information shown in FIG.

  In FIG. 10C, the type and ID of the received device information are stored in the type and ID of the discovery information, respectively. In the position of the discovery information, the position of the received device information is stored. The discovery information generation date is stored as the discovery information generation date. In the hopping number of discovery information, the number of times (for example, 1) to be transferred by the in-vehicle communication device 3 is stored. The deadline of discovery information stores the date and time of the deadline for holding discovery information (for example, one week after the creation date of discovery information).

  As in the first embodiment, the in-vehicle communication device 3 with ID = 3 that has received the discovery information including the failure information from the in-vehicle communication device 3 with ID = 2 transmits the discovery information to the surroundings at a predetermined timing. Similarly to the first embodiment, when the in-vehicle communication device 3 with ID = 3 receives device information from the roadside communication device 2, if the distance between the in-vehicle communication device 3 and the roadside communication device 2 is smaller than R, Send discovery information. The roadside communication device 2 that has received the discovery information including the failure information from the in-vehicle communication device 3 transmits this discovery information to the management center 1 via the communication network. In addition, when the roadside communication device 2 directly receives device information including failure information, the discovery information is similarly transmitted to the management center 1 via the communication network.

  FIG. 11A is a flowchart showing discovery information generation, registration, and transmission processing according to the second embodiment. In the process shown in FIG. 11A, S71 to S73 are added instead of S32 to S34, respectively, as compared with the process shown in FIG.

  When receiving the device information from another device (S31: YES), the control unit 31 determines whether or not the received device information includes failure information (S71). If the received device information includes failure information (S71: YES), the control unit 31 determines whether or not the device indicated by the received device information is registered in the discovery database together with the failure information (S72). .

  If the device indicated by the received device information is not registered in the discovery database together with the failure information (S72: NO), the control unit 31 generates discovery information including the failure information based on the received device information (S73). The generated discovery information is registered in the discovery database (S35). The discovery information registered in the discovery database includes a type, an ID, a position, a date and time, a time limit, and failure information. Subsequently, the control unit 31 immediately transmits the generated discovery information to the surroundings (S36). On the other hand, if the device indicated by the received device information is registered in the discovery database together with the failure information (S72: YES), the processing returns to S31 without performing the processing of S73, S35, and S36.

  FIG. 11B is a flowchart showing discovery information registration and transmission processing according to the second embodiment. In the process shown in FIG. 11B, S81 is added instead of S42 as compared with the process shown in FIG.

  When receiving the discovery information from the other in-vehicle communication device 3 (S41: YES), the control unit 31 determines whether the received discovery information is registered in the discovery database together with the failure information (S81). If the received discovery information is not registered in the discovery database together with the failure information (S81: NO), the control unit 31 registers the received discovery information in the discovery database as in S35 of FIG. 11A (S43). . Then, as in the first embodiment, when the hopping number of the received discovery information is greater than 0 (S44: YES), the control unit 31 subtracts 1 from the hopping number of the received discovery information and sets the discovery information to a predetermined value. After a time, it is transmitted to the surroundings (S45).

<Effect of Embodiment 2>
As mentioned above, according to Embodiment 2, the following effects are produced.

  When receiving the device information including the failure information, the control unit 31 of the in-vehicle communication device 3 generates the discovery information including the failure information if the device indicated by the received device information is not registered in the discovery database together with the failure information. The generated discovery information is registered in the discovery database. In addition, when receiving the discovery information including the failure information, the control unit 31 registers the received discovery information in the discovery database if the received discovery information is not registered in the discovery database together with the failure information. Thereby, the control unit 31 can reliably transmit the discovery information including the failure information to the roadside communication device 2 when receiving the device information from the roadside communication device 2. Further, since the position of the vehicle that has become unable to move due to the failure can be acquired from the discovery information including the failure information collected via the roadside communication device 2, the failed vehicle can be repaired quickly.

<Example of change>
Although the first and second embodiments of the present invention have been described above, the present invention is not limited to the first and second embodiments.

  For example, in the first embodiment, the search target is the pedestrian terminal device 4, but the search target may be the in-vehicle communication device 3. In this case, information indicating the in-vehicle communication device 3 is stored in the type of search information, and the ID of the in-vehicle communication device 3 to be searched is stored in the ID of the search information. The processing is performed in the same manner as in the first embodiment. In this way, using the discovery information collected via the roadside communication device 2, a vehicle (for example, a stolen vehicle or an accident vehicle) in which the vehicle-mounted communication device 3 is mounted and whose location is unknown is quickly searched. Can do.

  Moreover, in Embodiment 1, 2, although the control part 31 transmitted discovery information to the circumference | surroundings, when the distance of the said vehicle-mounted communication apparatus 3 and the roadside communication apparatus 2 is smaller than R, not only this but roadside communication When the received signal strength (RSSI) from the device 2 is larger than a predetermined value, the discovery information may be transmitted to the surroundings. Also in this case, as in the first and second embodiments, the discovery information can be reliably transmitted to the roadside communication device 2 while suppressing unnecessary transmission.

  In the first embodiment, the control unit 31 transmits the search information after a predetermined time when the unregistered search information having a hopping number larger than 0 is received (S15 in FIG. 6A). Search information may be sent immediately instead of later, or search information may be sent periodically. Further, the control unit 31 may transmit the received search information to the surroundings even if the received search information is registered in the search database.

  In the first embodiment, the control unit 31 transmits the discovery information immediately after generating the discovery information (S36 in FIG. 7A), but transmits the discovery information after a predetermined time or after a predetermined distance of movement. The discovery information may be transmitted periodically. In the second embodiment, the control unit 31 transmits the discovery information immediately after generating the discovery information (S36 in FIG. 11A), but may transmit the discovery information periodically.

  In the first and second embodiments, the control unit 31 transmits the discovery information after a predetermined time when the unregistered discovery information having a hopping number larger than 0 is received (S45 in FIG. 7B). 11 (b) S45), the discovery information may be transmitted immediately instead of after a predetermined time, or the discovery information may be transmitted periodically. Moreover, even if the received discovery information is registered in the discovery database, the control unit 31 may further register the newly received discovery information in the discovery database and transmit this discovery information to the surroundings.

  In the first embodiment, the search information and the discovery information need not have a time limit. In this case, when the management center 1 receives the discovery information, information indicating that the discovery information and the search information corresponding to the discovery information are to be discarded is transmitted to the in-vehicle communication device 3 via the roadside communication device 2. In the second embodiment, the discovery information may not have a time limit. In this case, when the management center 1 receives the discovery information, information indicating that the discovery information is to be discarded is transmitted to the in-vehicle communication device 3 via the roadside communication device 2.

  In the first and second embodiments, when the roadside communication device 2 receives the discovery information, the completion information may be immediately transmitted to the surroundings. Thereby, the in-vehicle communication device 3 that has transmitted the discovery information can know that the transmitted information has surely reached the roadside communication device 2.

  In the first embodiment, the history database is stored in the storage unit 33 of the in-vehicle communication device 3, and the control unit 31 of the in-vehicle communication device 3 receives the device information received from the in-vehicle communication device 3 and the pedestrian terminal device 4. It may be registered in the history database every time it is received. Such device information is registered in the history database with an upper limit of 1000, for example, and the oldest device information is sequentially deleted. In this case, when receiving the search information, the control unit 31 refers to the history database to determine whether or not device information related to the search target device is registered. When the device information related to the search target device is registered in the history database, the control unit 31 generates discovery information based on the device information. If it carries out like this, the police etc. can acquire the position of the apparatus of the search object in the past, and can advance a search more efficiently.

  Moreover, in Embodiment 1, 2, although the pedestrian terminal device 4 did not process based on search information, discovery information, and failure information, not only this but search information, discovery information, The failure information may be received and processing similar to that performed by the in-vehicle communication device 3 may be performed. Thereby, such information can be transmitted over a wide range via the pedestrian terminal device 4.

  Moreover, in Embodiment 1, 2, although the control part 31 produced | generated discovery information based on the position of the received apparatus information, it is not restricted to this, The position acquired by the position acquisition part 32 of the said vehicle-mounted communication apparatus 3 Discovery information may be generated based on

  In the second embodiment, the device information including the failure information is transmitted from the failed vehicle. However, the device information including the additional information may be transmitted from the pedestrian terminal device 4 as described above. In this way, for example, when the person carrying the pedestrian terminal device 4 cannot move due to injury or incident, the location of the pedestrian terminal device 4 can be specified when discovery information is transmitted as in the second embodiment. Therefore, this person can be rescued and protected quickly.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

1 ... Management center (central equipment)
2 ... Roadside communication device 3 ... In-vehicle communication device (other communication devices, communication devices)
4 ... Pedestrian terminal device (other communication devices)
31 ... Control unit 33 ... Storage unit 35 ... Wireless communication unit (communication unit)

Claims (8)

A communication unit that communicates with other communication devices wirelessly;
A storage unit;
A control unit,
The controller is
Based on the reception information received from the other communication device via the communication unit, it is determined whether or not the other communication device corresponds to a search target, and if it corresponds to a search target, at least the other Register discovery information including location information indicating the location of the communication device in the storage unit,
Based on receiving information from a roadside communication device installed on the roadside via the communication unit, the discovery information registered in the storage unit is transmitted to the roadside communication device via the communication unit,
An in-vehicle communication device characterized by that. The in-vehicle communication device according to claim 1,
The control unit transmits the discovery information registered in the storage unit to the roadside communication device via the communication unit when a distance between the in-vehicle communication device and the roadside communication device is smaller than a predetermined value. ,
An in-vehicle communication device characterized by that. The in-vehicle communication device according to claim 1,
The control unit transmits the discovery information registered in the storage unit to the roadside communication device via the communication unit when the strength of the signal received from the roadside communication device is larger than a predetermined value.
An in-vehicle communication device characterized by that. In the in-vehicle communication device according to any one of claims 1 to 3,
The storage unit stores identification information of a pedestrian terminal device as information indicating the search target,
The control unit, when the identification information of the search target pedestrian terminal device is included in the reception information received via the communication unit, registers the discovery information in the storage unit,
An in-vehicle communication device characterized by that. The in-vehicle communication device according to claim 4,
When the control unit receives the reception information directly from the search target pedestrian terminal device via the communication unit, the control unit transmits the discovery information to the surroundings via the communication unit.
An in-vehicle communication device characterized by that. In the in-vehicle communication device according to any one of claims 1 to 3,
The storage unit stores in-vehicle communication device identification information as information indicating the search target,
The control unit registers the discovery information in the storage unit when the received information received via the communication unit includes the identification information of the search target in-vehicle communication device.
An in-vehicle communication device characterized by that. In the in-vehicle communication device according to any one of claims 4 to 6,
When the control unit receives information indicating the search target from a central device that manages the traffic system, the control unit transmits the received information indicating the search target to the surroundings via the communication unit at a predetermined timing.
An in-vehicle communication device characterized by that. In the in-vehicle communication device according to any one of claims 1 to 3,
The search target is a communication device mounted on a broken vehicle,
The control unit, when the reception information received via the communication unit includes information indicating the failed vehicle, registers the discovery information in the storage unit,
An in-vehicle communication device characterized by that.

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