JP2018055471A - Communication device, communication method, communication program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication device, a communication method, a communication program, and a recording medium which are capable of realizing highly efficient communication by selectively transmitting and receiving only necessary data and preventing an increase in a communication traffic.SOLUTION: A communication device 10 mounted on a moving body and transmitting and receiving at least one piece of event information obtained along with movement of the moving body, is comprised of: an acquiring unit 13A for acquiring event information; an assigning unit for assigning to the event information an identifier for specifying the event information and a classifier corresponding to contents of the event information; and a transmitting and receiving unit 11 which transmits identification information including the identifier and the classifier, receives response information to the transmitted identification information, and transmits event information selected according to the response information from the event information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a communication device, a communication method, and a communication program, and more particularly to a communication device, a communication method, and a communication program using short-range wireless communication.

  2. Description of the Related Art A so-called inter-vehicle communication device that transmits and receives vehicle travel-related data between a plurality of traveling vehicles using short-range wireless communication is known. In such short-range wireless communication, when a large amount of data is communicated between a large number of terminals, an increase in traffic on the wireless network may be a problem, and it is desired to improve communication efficiency.

  For example, Patent Document 1 discloses a means for acquiring data including a flag indicating the presence or absence of retained data from another vehicle-to-vehicle communication device, a means for detecting the state of the flag, and the state of the flag, There is disclosed a vehicle-to-vehicle communication device having means for transmitting a holding data transmission request to another vehicle-to-vehicle communication device and acquiring the holding data.

JP-A-2005-57442

  When the inter-vehicle communication device as described above is used, for example, when one vehicle holds holding data unnecessary for another vehicle, the unnecessary holding data is transmitted and traffic One example of the problem is to cause an increase.

  The present invention has been made in view of the above points, and a communication device capable of highly efficient communication by selectively transmitting and receiving only necessary data and preventing increase in communication traffic. Another object of the present invention is to provide a communication method, a communication program, and a recording medium.

  According to the first aspect of the present invention, an acquisition unit that acquires at least one event information obtained along with movement of a moving object, an identifier that identifies the event information, and an event information A granting unit for granting a classifier corresponding to the content; and transmitting identification information including the identifier and the classifier; receiving response information for the transmitted identification information; A transmission / reception unit for transmitting event information selected based on the response information.

  The invention according to claim 15 is a communication method by a communication device that is mounted on a mobile body and transmits / receives at least one event information obtained along with the movement of the mobile body along the movement path. An acquisition step of acquiring the event information, an adding step of adding an identifier for identifying the event information and a classifier corresponding to the content of the event information to the event information, and transmission / reception A communication step of transmitting identification information including an identifier and a classifier, receiving response information with respect to the identification information, and transmitting event information selected from the event information based on the response information.

  The invention described in claim 16 is a communication program, which causes a computer to execute the communication method described in claim 15.

  The invention according to claim 17 stores the communication program according to claim 16.

  The invention according to claim 18 is a communication device that is mounted on a mobile body and transmits / receives at least one event information acquired as the mobile body moves along the movement path of the mobile body. Receiving identification information that includes the identifier that identifies the event information and the classifier that corresponds to the content of the event information, and that is selected based on the received identification information. A communication apparatus comprising: a transmission / reception unit that transmits response information including an identifier and receives event information selected from the event information based on the response information.

It is a block diagram which shows the structure of the communication apparatus of an Example. It is a flowchart which shows operation | movement of the communication apparatus of FIG. It is a flowchart which shows operation | movement of the communication apparatus of FIG. It is a flowchart which shows the operation | movement of the Example of FIG. It is a flowchart which shows the operation | movement of the Example of FIG. It is a flowchart which shows the operation | movement of the Example of FIG. It is a figure which shows the structure of the vehicle travel related data which the communication apparatus of an Example transmits / receives. It is a figure which shows the structure of the vehicle travel related data which the communication apparatus of an Example transmits / receives. It is a figure which shows the structure of the vehicle travel related data which the communication apparatus of an Example transmits / receives.

  Preferred embodiments of the present invention will be described below in detail with reference to the drawings. In the following description and the accompanying drawings, substantially the same or equivalent parts are denoted by the same reference numerals.

  A communication apparatus according to an embodiment of the present invention is mounted on a mobile body such as a vehicle traveling on a road (hereinafter simply referred to as a vehicle), and is disclosed in, for example, Patent Document 1 with a communication apparatus mounted on another vehicle. Car-to-vehicle communication as shown.

  Hereinafter, the configuration of the communication apparatus 10 of the present invention will be described with reference to FIG. The transmission / reception unit 11 can transmit / receive data that contributes to traveling of the vehicle, such as road information, with a communication device (hereinafter referred to as another vehicle communication device) mounted on another vehicle. Moreover, the transmission / reception part 11 can also receive the information (henceforth vehicle driving | running | working data) regarding the driving | running | working state of the other vehicle containing the present position information of another vehicle.

  The transmission / reception unit 11 is a wireless device compliant with a wireless communication standard such as a Wi-Fi (registered trademark) standard or a Bluetooth (registered trademark) standard.

  The control unit 13 includes, for example, a CPU (Central Processing Unit) that performs arithmetic processing. The control unit 13 includes an acquisition unit 13A. The process acquisition unit 13A receives various pieces of information from each unit in the communication device 10 and from the outside, performs processing such as analysis on the acquired information, and acquires the processed information as information in a predetermined format. Is possible.

  Further, the control unit 13 can issue various operation commands to each unit of the communication device 10. In addition, the control part 13 can process the data regarding driving | running | working of the own vehicle. In addition, the control unit 13 can analyze data related to traveling of other vehicles received by the transmission / reception unit 11.

  The position detection unit 15 has a GPS (Global Positioning System) positioning function, for example, and calculates latitude and longitude data indicating its own position. The position detector 15 sends latitude and longitude position data, which are the calculation results, to the controller 13.

  The storage unit 17 is a storage device such as a hard disk, a flash memory, an SSD (Solid State Drive), or a RAM (Random Access Memory) that stores software necessary for the operation of the communication device 10 or data generated in the arithmetic processing of the control unit 13. It is made up of.

  A camera 19 as an imaging device is mounted on a vehicle on which the communication device 10 is mounted. The camera 19 is installed, for example, so as to include the right front of the vehicle in the viewing angle, and can photograph the surroundings of the vehicle. The camera 19 sends the obtained image data such as a moving image or a still image to the information collecting unit 21.

  The information collecting unit 21 extracts a still image from the image data sent from the camera 19 every predetermined time (for example, every 5 seconds) and sends it to the control unit 13. The acquisition unit 13A of the control unit 13 can analyze a still image sent from the information collection unit 21 and analyze an event occurring around the vehicle. The acquiring unit 13A can generate information that simplifies the content of the analyzed event. The communication apparatus 10 can transmit this to other vehicles. The other vehicle can receive the simplified information and selectively request details of the event based on the received simplified information. The communication device 10 can selectively transmit the details of the detailed event in response to the request.

  The display unit 25 includes, for example, a display panel having an image display surface such as a liquid crystal panel and a driver that drives the display panel, and displays image information such as a map on the screen of the display panel in response to a command from the control unit 13.

  The operation unit 27 receives a user operation input and transmits information related to the input to the control unit 13. The operation unit 27 may be a button-type mechanical operation unit. The operation unit 27 may constitute a touch panel display together with the display panel of the display unit 25.

  The operation of the control unit 13 of the communication device 10 will be described with reference to FIGS. 2 to 6 and Tables 1 to 4. As described above, the vehicle travel data of the other vehicle from the transmission / reception unit 11, the position data of the host vehicle from the position detection unit 15, and the image data from the information collection unit 21 are sent to the control unit 13.

  As described above, the acquisition unit 13A can receive and analyze information transmitted from each unit of the communication device 10 or from the outside. In addition, as a result of the analysis, the acquisition unit 13 </ b> A determines that the situation (hereinafter referred to as a travel inhibition event) that impedes vehicle travel has occurred in an area along the travel route of the host vehicle. It is possible to acquire information related to the travel inhibition event.

  The control unit 13 can transmit / receive information related to the travel inhibition event to / from other vehicle communication devices via the transmission / reception unit 11.

  The flowchart of FIG. 2 shows a travel inhibition event acquisition routine when the acquisition unit 13A acquires a travel inhibition event. For example, when the supply of power to the communication device 10 is started, the travel inhibition event acquisition routine is started when, for example, the ignition key is set to the ACC state in an automobile or the like.

  The acquiring unit 13A determines whether or not a travel inhibition event is detected in step S11. Examples of the travel inhibition event include a traffic jam, an accident, or road construction in the oncoming lane.

  The acquisition unit 13A calculates, for example, the density of the vehicle from the number of vehicles in a certain section obtained from the position data of the other vehicle obtained from the image of the camera or the position data of the other vehicle received by the transmission / reception unit 11. When the density exceeds a predetermined threshold, it may be determined that a traffic jam that is a travel inhibition event has been detected.

  Further, the acquiring unit 13A may analyze the image data from the information collecting unit 21 according to a predetermined standard and determine whether or not a traffic jam, an accident, or a road construction that is a travel inhibition event is detected. For example, the acquisition unit 13A may make a determination regarding a traffic jam, an accident, or road construction by image processing such as pattern matching (template matching). For example, a sign indicating that construction is underway may be detected from the image data to determine that road construction is being performed.

  In addition, for example, as described in Japanese Patent Application Laid-Open No. 2005-230579, a digital image is divided into regions for each segmentation including a group of pixels having the same properties, and classified by a classifier such as SUV (support vector machine). By doing so, the content of the image may be specified, and it may be determined whether a traffic jam or an accident has occurred or road construction is being performed.

  If the acquisition unit 13A determines in step S11 that a travel inhibition event has not occurred (step S11: NO), the acquisition unit 13A returns to the beginning of this routine and executes step S11 again.

  When the acquisition unit 13A determines in step S11 that a travel inhibition event has been detected (step S11: YES), the acquisition unit 13A analyzes each of the travel inhibition events, and details the travel inhibition event as event information (hereinafter referred to as “event information”). Simply referred to as detailed information). Thereafter, an occurrence order number is assigned to each detailed information as an identifier for specifying the detailed information (step S12). Each time a travel inhibition event occurs, an occurrence order number is given to the event in order along the time series. For example, when a traffic jam is detected as a travel inhibition event, the acquiring unit 13A specifies the traffic jam start point and end point from the position data of other vehicles, and calculates the distance of the traffic jam continuous section. The length may be detailed information.

  Table 1 shows specific examples of the detailed information of the travel inhibition event and the order of occurrence number.

  As shown in the “Detailed information of travel inhibition event” column of Table 1, the detailed information of the travel inhibition event includes the time when the travel inhibition event is detected, the location information of the host vehicle at the time, and the content of the travel inhibition event. include. For example, detailed contents of events relating to traffic jams, accidents, and road construction are stored in the “contents of travel inhibition events”. For example, the occurrence order number “1” is assigned to the detailed information in the top row of Table 1.

  After the execution of step S12, the detailed information of the travel inhibition event is classified into a plurality of categories based on the content of each travel inhibition event. Thereafter, a classifier corresponding to the classified category is given to the detailed information (step S13). In step S12 and step S13, the acquisition unit 13A functions as an assigning unit that assigns a generation order number and a classifier.

Table 2 shows the decision criteria when classifying each category, the event categories indicating the outline of the travel-inhibiting events corresponding to each decision criteria, and examples of “classifiers” assigned to the event categories. ing.

  The event categories shown in Table 2 are broadly classified into three types: accidents, traffic jams, and road works. Further, the same type of event is classified into three levels of level 1 to level 3 according to the severity of the event. That is, the travel inhibition event is classified not only by the type of event but also by the severity. A classifier is defined for each event category. Therefore, by classifying according to the determination criteria, the event category corresponding to each event is determined, and the classifier corresponding to the event category is determined.

  For example, as shown in the top row of Table 2, when it is determined that the detailed information of the travel inhibition event corresponds to the determination criterion “no accident, no traffic obstruction”, the detailed information of the travel inhibition event is A classifier “a” corresponding to the category “accident (level 1)” and corresponding to the category is assigned. Similarly, when it is determined that the detailed information of the travel inhibition event corresponds to “congestion, 10 km or more”, the detailed information of the travel inhibition event corresponds to the event category “congestion (level 3)” A classifier “f” corresponding to is assigned.

Table 3 shows an example in which a classifier is assigned according to the determination criteria of Table 2 according to the contents of each of the travel inhibition events of Table 1.

  For example, “Natural traffic jam, 1.5 km, 5 minutes to pass”, which is the travel inhibition event of occurrence number 1, is a traffic jam of less than 2 km and falls under the category of “traffic jam (level 1)” from Table 2. A classifier “d” is assigned.

  For example, in the case of the detailed information of the travel inhibition event with the occurrence order number 4, the content of the travel inhibition event included in the information is “self-damage accident, no regulation, traffic warning”. The classifier “a” corresponding to the event classification “accident (level 1)” is assigned to the detailed information of the travel inhibition event.

  Also, for example, in the case of detailed information of the travel inhibition event with the occurrence order number 3, the content of the travel inhibition event included in the information is “accident traffic 15 km, 30 minutes to pass”. And the classifier “f” corresponding to the event classification “traffic jam (level 3)” is assigned to the detailed information of the travel inhibition information.

  Further, for example, in the case of the detailed information of the travel inhibition event with the occurrence order number 5, the content of the travel inhibition event included in the information is “under construction, no traffic”, so the determination criterion “road construction, no traffic” And the classifier “i” corresponding to the event classification “road construction (level 3)” is given to the detailed information of the travel inhibition information.

  After the execution of step S13, detailed information on the travel inhibition event to which the occurrence order number and the classifier are assigned is stored in the storage unit 17 (step S14).

  Then, transmission / reception by the communication apparatus 10 of the information regarding the above-described travel inhibition event will be described. Transmission / reception by the communication device 10 is performed by wireless communication. The wireless communication is, for example, a wireless LAN standard such as IEEE 802.11, Wi-Fi (registered trademark), or Wi-Fi Direct (registered trademark), or another wireless communication standard such as Bluetooth (registered trademark). Can be done according to.

  Wireless communication by the communication device 10 can be performed by broadcast transmission without specifying a transmission destination or specifying a transmission destination. The wireless communication by the communication device 10 can also be performed by P2P (Peer to Peer) communication by designating a transmission / reception destination.

  The flowchart of FIG. 3 shows a travel inhibition event distribution routine when the control unit 13 generates information that simplifies the content of the travel inhibition event acquired by the acquisition unit 13 </ b> A and distributes the information via the transmission / reception unit 11.

  In step S21, the control unit 13 determines whether or not detailed information is stored. If it is determined in step S21 that detailed information is not stored (step S21: NO), the process returns to the beginning of this routine.

  When it is determined in step S21 that the detailed information is stored (step S21: YES), the control unit 13 sets at least one set of the generation order number given to the detailed information and the classifier corresponding thereto. The identification information is generated (step S22). For example, in step S22, a set of occurrence order numbers and classifiers may be extracted based on the occurrence order numbers, classifiers, detection times, and the like. For example, by selecting in order from the latest occurrence order number, it is possible to extract a set of occurrence order number and classifier corresponding to newer detailed information. Also, for example, only detailed information to which a specific classifier is assigned can be selected. Furthermore, only new detailed information can be selected from a plurality of detailed information to which a specific classifier is assigned based on the time. In step S22, a pair of generation order number and classifier given to all the stored detailed information may be selected, and identification information including this may be generated.

  After executing step S22, the control unit 13 instructs the transmission / reception unit 11 to broadcast (distribute) identification information, which is information including a combination of the generation order number and the classifier extracted in step S22 (step S23). ). For example, in the broadcast transmission, identification data may be transmitted together with information such as SSID in an existing data frame such as a data frame transmitted including an SSID (Service Set Identifier). Examples of the data frame transmitted including the SSID include a beacon frame, a probe request frame, and a probe response frame, and these can be used for transmission of identification information.

Table 4 shows an example of a set of generation order numbers and classifiers.

  Table 4 shows classifiers for generation order numbers 1 to 7, that is, sets of seven generation order numbers and classifiers. The identification information includes, for example, at least one set of occurrence order number and classifier as shown in Table 4.

  For example, the control unit 13 may execute this routine at regular intervals. Moreover, the control part 13 is good also as performing this routine, when an other vehicle is detected within the range which can distribute the own vehicle. Further, the control unit 13 may execute this routine only when it is determined that transmission of the identification information is necessary based on the detailed information of the travel inhibition event. For example, regarding information related to an accident, if only information with a low severity of an accident (for example, information classified as “accident (level 1)” in Table 2) is stored, it is determined that transmission of identification information is unnecessary, When information with a high severity of accident (for example, information classified as “accident (level 3)” in Table 2) is stored, it may be determined that transmission of identification information is necessary.

  When the other vehicle communication device having the same function as the communication device 10 receives the identification information transmitted by the above routine, it transmits response information (hereinafter also referred to as request information) to the received identification information. More specifically, the other vehicle communication device determines, based on the classifier, whether or not the received identification information includes information related to detailed information on a travel inhibition event that should be requested by the other vehicle communication device. To do. When it is determined that the information to be requested is included, the other vehicle communication device selectively transmits the generation order number of the detailed information to be requested.

  The flowchart of FIG. 4 is a travel inhibition event providing routine in which the control unit 13 transmits this information, which is information including detailed information of a travel inhibition event, via the transmission / reception unit 11 in response to request information from another vehicle communication device. Is shown.

  In step S31, the control unit 13 determines whether or not the request information from the other vehicle communication device has arrived at the host vehicle. Specifically, when the request information is received, the control unit 13 determines whether or not the received request information includes the identification ID of the communication device 10 so that the received request information is addressed to the own vehicle. It is determined whether or not it has arrived. The request information includes an occurrence sequence number selected based on the classifier by the other vehicle communication device from the identification information transmitted from the transmission / reception unit 11 in the travel inhibition event distribution routine. That is, the other-vehicle communication device requests detailed information on the travel inhibition event corresponding to the occurrence order number by selecting the occurrence order number based on the classifier.

  The other vehicle communication device may determine the newness of the detailed information based on the generation order number, and may request the detailed information selected based on the newness determination in addition to the classifier. The request information also includes an identification ID of the other vehicle communication device. For example, a MAC address (Media Access Control Address) may be used as the identification ID of the communication device 10 and the other vehicle communication device.

  When the control unit 13 determines in step S31 that the request information has arrived for the vehicle (step S31: YES), the control unit 13 selects and extracts detailed information corresponding to the generation order number included in the request information. It reads from the memory | storage part 17 and produces | generates this information (step S32). This information is information including the generation order number and detailed information on the travel inhibition event as shown in Table 1, for example. In addition, this information includes the identification ID of the other vehicle communication device that is the transmission source (request source) of the request information and the identification ID of the communication device 10.

  When it is determined in step S31 that the request information has not arrived for the vehicle (step S31: NO), the control unit 13 executes this routine from the beginning.

  After executing step S32, the control unit 13 instructs the transmission / reception unit 11 to transmit this information (step S33). The transmission / reception unit 11 transmits this information addressed to the other vehicle communication device that is the transmission source (request source) of the request information. More specifically, for example, this information including the identification ID of the other-vehicle communication device of the request source is broadcasted.

  In the above description, the transmission / reception unit 11 transmits the information by broadcast transmission. However, the transmission / reception unit 11 may transmit the information to a specific transmission destination by performing P2P (Peer to Peer) communication. For example, even if the authentication request is made to the other vehicle communication device that is the transmission destination in step 33 and the P2P communication is started after the authentication permission from the other vehicle communication device is established and the connection is established, this information is transmitted. good. For example, the communication device 10 can make the authentication request using the identification ID of the other vehicle communication device included in the request information. Further, for example, the other-vehicle communication device can determine whether or not the authentication is permitted from the identification ID of the communication device 10 included in the identification information.

  In the flowchart of FIG. 5, for example, when the communication device 10 receives the identification information of the travel inhibition event from another vehicle communication device having the same function as the communication device 10, the control unit 13 sends a request via the transmission / reception unit 11. 3 shows a travel inhibition event request routine for transmitting information.

  In step S41, the control unit 13 determines whether or not the identification information has arrived from the other vehicle communication device, that is, whether or not the transmission / reception unit 11 has received the identification information.

  If the control unit 13 determines in step S41 that the identification information has not arrived (step S41: NO), the control unit 13 repeats this routine from the beginning.

  If it is determined in step S41 that the identification information has arrived (step S41: YES), the control unit 13 requests the other vehicle communication device that is the transmission source of the identification information based on the classifier included in the identification information. It is determined whether there is detailed information to be processed (step S42).

  If the control unit 13 determines in step S42 that there is no detailed information to be requested (step S42: NO), the control unit 13 returns to the beginning of this routine.

  If it is determined in step S42 that there is detailed information to be requested (step S42: YES), the control unit 13 selects a generation order number corresponding to the detailed information to be requested from the received identification information, Request information is generated (step S43). For example, the determination in step S42 may be performed according to a predetermined determination criterion. For example, when the classifier corresponding to the classifier designated in advance is included in the identification information, it may be determined that there is detailed information to be requested. Further, for example, new information may be preferentially selected based on the generation order number.

  The identification information includes the identification ID of the other vehicle communication device that is the transmission source of the identification information. The request information includes the identification ID of the other vehicle communication device.

  After executing step S43, the control unit 13 instructs the transmission / reception unit 11 to transmit request information (step S44). For example, the transmission / reception unit 11 broadcasts request information including the identification ID of the other-vehicle communication device of the transmission source.

  Further, when the communication device 10 receives the detailed information corresponding to the transmitted request information from the other vehicle communication device, for example, the communication device 10 displays the received content on the display screen of the display unit 25 as shown in the flowchart of FIG. It is also good. In the travel inhibition event display routine shown in FIG. 6, it is determined whether or not the detailed information of the travel inhibition event has been received (step S51), and character information or image information or the like that displays the details of the detailed information when it is determined that it has been received. Display data including it is generated (step S52). Then, the display data is displayed on the display screen of the display unit 25 (step 53).

  In addition, although the example which broadcasts request information was demonstrated, you may transmit to a specific transmission destination by performing P2P communication similarly to the case where this information mentioned above is transmitted. As described above, the communication apparatus 10 can perform broadcast transmission by including information such as identification information and request information in an existing data frame such as a data frame transmitted including the SSID. Examples of the data frame transmitted including the SSID include a beacon frame, a probe request frame, and a probe response frame. Also, for example, identification information or request information can be simply transmitted by broadcasting identification information or request information using the number of unused characters (capacity) out of 32 characters that can be transmitted as an SSID. Can do. Further, a MAC address (Media Access Control Address) can also be used as the identification ID of the transmission source and transmission destination vehicles.

  For example, a data frame transmitted including the SSID may be periodically output (transmitted) including identification information or request information. When a vehicle is detected within a certain distance, a predetermined condition is satisfied. Only when it is satisfied, the identification information or the request information may be included. Similarly, a data frame transmitted including a Wi-Fi Direct (registered trademark) device ID is also applicable as a data frame when transmitting identification information or request information.

  Further, the data structure of the identification information, request information, and detailed information transmitted / received in each of the above-described routines can be, for example, a data frame as shown in FIGS. 7A, 7B, and 7C. As shown in FIG. 7A, the identification information may include a plurality of generation number and classifier pairs and an identification ID (M1) of the transmission source vehicle. The vehicle that has received the identification information including the identification ID (M1) can transmit request information that is a response to the identification information by designating a destination.

  As shown in FIG. 7B, the request information includes the identification ID (M2) of the request source vehicle that is the transmission source of the request information, in addition to the specific generation order number and the transmission source ID (M1) of the identification information. Also good. The vehicle that has received the request information including the identification ID (M2) can specify the destination as the identification ID (M2) and transmit the detailed information of the travel inhibition event according to the request information.

  As described above, the requesting vehicle may select, for example, an occurrence order number paired with a specific classifier. Further, the requesting vehicle may select a generation order number to be requested based on the generation order number from a set of generation order numbers and classifiers to which the same classifier is assigned.

  For example, since the more detailed information with the later generation order number corresponds to the travel inhibition event that occurred later, selecting the later generation order number selects newer detail information. be able to. In FIG. 7B, the one with the larger generation order number among the classifiers “d” shown in FIG. 7A, that is, the new one is selected, and the corresponding generation order numbers “11” and “12” are selected. "Is shown in the example included in the request information.

  Further, as shown in FIG. 7C, this information can be a data frame including detailed information corresponding to the generation order number included in the request information. Note that the detailed information may include image data. For example, the image data corresponding to the travel inhibition event in the image acquired by the camera 19 may be included in the detailed information and transmitted.

  Further, at least one of the identification information, the request information, and the main information may include information on the travel route of the transmission source vehicle of each information. For example, if the identification information includes information on the already traveled route that the source vehicle of the identification information has already traveled at the time of transmission of the identification information, the vehicle that has received this information sends the already traveled route information to the request target Can be one of the criteria for selecting the detailed information.

  Further, for example, when the request information includes information related to the planned travel route on which the request source vehicle is scheduled to travel, the vehicle that has received the request includes this information including detailed information on the travel inhibition event to be transmitted. When generating, it is possible to recognize the presence or absence of a common route section or a common route section by comparing the existing movement route of the host vehicle with the planned movement route of the request source vehicle. And the said received vehicle can determine whether the driving | running | working obstruction event which should be transmitted to the said request origin vehicle is selected, or detailed information is transmitted.

  For example, another vehicle that travels on an oncoming lane vehicle or another vehicle that joins a travel route that is adjacent to a different route with respect to the travel route on which the host vehicle travels has acquired information on the travel inhibition event that the host vehicle has acquired. There is no possibility. In addition, the other vehicle may have acquired information regarding a travel inhibition event that the host vehicle has not acquired. Therefore, the information which is not acquired mutually can be exchanged by transmitting / receiving the travel inhibition event which each vehicle acquired between the own vehicle and other vehicles. At this time, by comparing the planned route information and the existing route information as described above, it is possible to more accurately select a travel inhibition event to be transmitted and received.

As described above, according to the communication device 10 of the present embodiment, a travel inhibition event is acquired, an occurrence order number (identifier) is assigned, and a classifier based on the content of the acquired travel inhibition event is assigned. Thus, each of the travel inhibition events can be specified. Then, by transmitting identification information including a pair of an identifier and a classifier, it is possible to selectively transmit and receive only the detailed information of the travel inhibition event requested from the other vehicle that has received the identification information, that is, only the information required by the other vehicle. can do. Therefore, highly efficient communication is possible, and an increase in communication traffic can be prevented.
[Modification]
As a modification of the communication apparatus of the present embodiment, a case where a plurality of types of classifiers are assigned to the acquired travel inhibition event will be described.

Table 5 shows that each of the travel inhibition events is given an event classifier based on the event classification, an elapsed time classifier based on the elapsed time from the detection time, and a distance classifier based on the distance from the current position. An example is shown.

  The other vehicle communication device may select the requested detailed information based on any one of the plurality of classifiers shown in Table 5. Further, the other vehicle communication device can make a comprehensive determination based on the plurality of classifiers in Table 5 and select the detailed information to be requested.

Tables 6 and 7 show the criteria for assigning the elapsed time classifier and the distance classifier.

  Further, the communication device 10 may determine the evaluation score of each classifier as shown in Table 6 and Table 7, for example. For example, the communication device 10 may determine whether or not it is necessary to transmit the identification information based on the total value of the evaluation points of the classifiers. For example, the other vehicle communication device may generate request information based on the total value.

  In addition, it is good also as deleting the detailed data of the driving | running | working obstruction event in which fixed time passed from detection time.

  As described above, according to the modification of the present embodiment, a plurality of classifiers are assigned to a travel inhibition event, and the needs of other vehicles are distributed by distributing the plurality of classifiers and occurrence order numbers. This makes it possible to freely select and send and receive only necessary information with high accuracy. Therefore, the amount of data actually transmitted and received between the communication devices can be brought close to the necessary minimum.

  In addition, although the example which uses a camera was demonstrated as an information collection means of the communication apparatus of a present Example, it is not restricted to this, You may use another means or may combine with another means. For example, the communication apparatus according to the present embodiment may include a radar in addition to the camera. For example, when the radar detects an object, the information collection unit 21 sends image data from the camera to the control unit 13. It is also good. Moreover, although the example which analyzes the image data of a still image and determines a driving | running | working obstruction event was demonstrated, you may determine from the moving image of a fixed time, for example not only this.

  Moreover, although the detection time included in the detailed information of the travel inhibition event has been described as the time at which each event is specified, the present invention is not limited to this. It is good also as the time when the data for specifying detailed information, such as the data regarding the position of another vehicle, or image data, were acquired.

  In addition, the example in which the identifier is the generation order number and is represented by a number has been described. The identifier may be given so that each piece of detailed information can be distinguished.

  In addition, the classification of events when a classifier is assigned is not limited to the above. For example, the type of event, the severity for each type, the elapsed time for each type, and the like can be arbitrarily set. Furthermore, an arbitrary selection criterion can be set even when response information is generated when the identification information is received. For example, you may set according to the condition of the vehicle which produces | generates a response, such as "acquire only the accident (level 3) within 30 minutes from occurrence". The assignment of the classifier and the setting of the selection criteria at the time of generating the response may be performed by operating the operation unit 27.

  In addition, although the classifier demonstrated the example provided at the time of acquisition of a driving | running | working obstruction event, only the generation | occurrence | production order number is provided at the time of acquisition of a driving | running | working obstruction event, and a classifier does not need to be provided. A classifier may be given based on the detailed information of the latest travel inhibition event when transmitting the identification information.

  In the above-described embodiment, when request information and this information are broadcasted, for example, the request information can be transmitted in a data frame transmitted including an SSID that is periodically transmitted. Further, for example, this information may be included in a data frame different from a data frame transmitted including an SSID that is periodically transmitted. For example, this information may be transmitted between SSID transmissions or by temporarily interrupting SSID transmission and transmitting the other data frame. It is also possible to apply a data frame transmitted including a device ID of Wi-Fi Direct (registered trademark) to the transmission of request information and this information.

  In addition, although the example in which the event information transmitted and received by the communication device 10 is the travel inhibition information has been described, the present invention is not limited thereto. The event information may include other information that contributes to the traveling of the vehicle, such as information related to ensuring driving efficiency and safety. For example, the event information may include information such as road availability and accident-free achievement period.

  As described above in detail, according to the communication device of the present invention, information related to traveling of the host vehicle can be acquired as event information, and an occurrence order number (identifier) and a classifier can be assigned to each event information. it can. Therefore, the own vehicle can distribute or transmit the identification information including the set of the identifier and the classifier, that is, information in which the event information is simplified, to another vehicle. And the other vehicle which received identification information can transmit the request information containing the identifier selected based on the identifier and the classifier. The own vehicle can selectively transmit only the main information of the event requested from the other vehicle, that is, the information required by the other vehicle. Therefore, highly efficient transmission / reception is possible, and an increase in communication traffic can be prevented.

  Further, the communication method of the present invention can be executed by a program for executing the communication method of the present invention. The program for executing the communication method of the present invention is recorded on a computer-readable recording medium and can be suitably used. For example, a computer built in or connected to the communication device of the present invention can read the program of the present invention from a recording medium and execute the communication program of the present invention.

DESCRIPTION OF SYMBOLS 10 Communication apparatus 11 Transmission / reception part 13 Control part 13A Acquisition part 15 Position detection part 17 Storage part 19 Camera 21 Information collection part 25 Display part 27 Operation part

Claims (18)

An acquisition unit for acquiring at least one event information obtained along with the movement of the moving body;
An assigning unit for assigning an identifier for identifying the event information and a classifier corresponding to the content of the event information to the event information;
Transmission / reception for transmitting identification information including the identifier and the classifier, receiving response information for the transmitted identification information, and transmitting event information selected from the event information based on the response information And
A communication device comprising:   The communication device according to claim 1, wherein the assigning unit assigns the classifier based on an event type related to the event information.   The communication device according to claim 1, wherein the assigning unit assigns the classifier based on an event severity related to the event information.   The event information includes information related to a time when the event information is acquired, and the assigning unit assigns the classifier based on the information related to the time. The communication apparatus according to claim 1.   The event information includes information related to an elapsed time from the time when the event information is acquired to a time when the identification information is transmitted, and the assigning unit assigns the classifier based on the information related to the elapsed time. The communication apparatus according to any one of claims 1 to 4, wherein the communication apparatus is characterized in that:   The event information includes information related to a position of the moving object at a time when the event information is acquired, and the assigning unit assigns the classifier based on the information related to the position. The communication device according to any one of 1 to 5.   The communication apparatus according to claim 1, wherein the transmission / reception unit transmits the identification information including already-moved route information related to the already-moved route of the moving body.   The response information includes an identification ID of another mobile body that has received the identification information, and the transmission / reception unit transmits the event information to the other mobile body specified by the identification ID. Item 8. The communication device according to any one of Items 1 to 7.   The communication apparatus according to claim 1, wherein the identifier is given in order along a time series when the at least one event information is acquired.   The communication apparatus according to claim 1, wherein the transmission / reception unit transmits the event information including image information acquired by an imaging unit mounted on the moving body.   The communication apparatus according to claim 1, wherein the transmission / reception unit transmits only identification information selected based on a content of the at least one event information.   The said transmission / reception part transmits the said identification information, only when it determines with transmission of the said identification information being required based on the said event information, The Claim 1 thru | or 11 characterized by the above-mentioned. Communication equipment.   The communication device according to any one of 1 to 12, wherein the assigning unit assigns the classifier at regular intervals.   The communication device according to any one of 1 to 13, wherein the assigning unit assigns the classifier when transmitting the identification information. A communication method by a communication device that is mounted on a mobile body and transmits / receives at least one event information obtained along with the movement of the mobile body along a movement path,
An acquisition step in which the acquisition unit acquires the event information;
An assigning step in which the assigning unit assigns an identifier for identifying the event information and a classifier corresponding to the content of the event information to the event information;
Communication in which a transmitting / receiving unit transmits identification information including the identifier and the classifier, receives response information with respect to the identification information, and transmits event information selected based on the response information from the event information And a communication method.   A communication program for causing a computer to execute the communication method according to claim 15.   A computer-readable recording medium storing the communication program according to claim 16. A communication device that is mounted on a mobile body and transmits / receives at least one event information acquired as the mobile body moves along the movement path of the other mobile body,
The identification information including the identifier for identifying the event information and the classifier corresponding to the content of the event information, which is given to the event information by the other mobile body, and receives the received identification information A communication apparatus comprising: a transmission / reception unit that transmits response information including the identifier selected based on the event information and receives the event information selected based on the response information from the event information.

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