JP2016021122A - Event information distribution device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an event information distribution device capable of timely distributing event information to an appropriate distribution destination even when communication delay occurs.SOLUTION: A server device 12 comprises: a distribution target region definition section 88 for defining distribution target regions 116 and 122 to which event information 62 is distributed; and a distribution destination determination section 90 for determining one or more movable bodies (an own vehicle 14 and an other vehicle 16) existing in the distribution target regions 116 and 122 as distribution destinations of the event information 62 by referring to location information read from a probe information DB 78. The distribution target region definition section 88 defines regions excluding a neighborhood region 120 of an event location 114 where an event occurs as the distribution target regions 116 and 122.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an event information distribution device that distributes event information indicating an event that has occurred at least on a road.

  Conventionally, various safe driving support systems that support safe driving of vehicles by wirelessly communicating with each other between a plurality of vehicles and notifying and alerting passengers of information about the events that have occurred (hereinafter referred to as event information) Has been developed.

  Patent Document 1 proposes an in-vehicle wireless device including a control unit that changes at least one of transmission intensity, transmission direction range, and transmission frequency of a radio signal by a radio unit based on a structure of a road on which the vehicle travels. ing.

JP 2009-141568 A ([0006])

  Recently, with the spread of mobile terminal devices and the development and expansion of communication infrastructure, wide area wireless communication (including cellular communication) is becoming applicable to the above-mentioned safe driving support system.

  In this wide area wireless communication, there is a possibility that a handover may occur between base stations by moving across multiple base stations, so it is assumed that a communication delay on the order of several seconds may occur depending on the communication environment. The In this case, the traveling vehicle may receive the event information after reaching the event position, not before reaching the event position. As a result, the vehicle occupant may misunderstand that an event other than the event described above has newly occurred.

  However, the in-vehicle wireless device described in Patent Document 1 assumes direct wireless communication between the own vehicle and another vehicle, and does not assume any occurrence of the communication delay described above.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an event information distribution device capable of distributing event information in a timely manner even when a communication delay occurs.

  An event information distribution apparatus according to the present invention is an apparatus that distributes event information indicating at least an event that has occurred on a road, a position information storage unit that stores position information in one or more mobile objects, In the distribution target area defined by the distribution target area defining means by referring to the distribution target area defining means for distributing the event information to be distributed and the position information read from the position information storage means. Distribution destination determining means for determining one or more of the moving objects existing in the event information as distribution destinations of the event information, wherein the distribution target area defining means excludes the vicinity area of the event position where the event has occurred An area is defined as the distribution target area.

  In this way, the distribution target area defining means defines the area excluding the vicinity area of the event position where the event has occurred as the distribution target area, so that while the event information is being distributed, It is possible to prevent an existing moving body from passing through the event position. Thereby, even when communication delay occurs, event information can be distributed to an appropriate distribution destination in a timely manner. Further, by narrowing the distribution target area by the neighborhood area, another effect that the data communication amount at the time of distribution processing can be reduced also occurs.

  Further, it is preferable that the distribution target area defining unit changes a size of the neighboring area according to a speed limit of the road to which the event position belongs. Generally speaking, there is a high correlation between the speed of a moving object existing on a road and the speed limit of the road. That is, it is possible to exclude a nearby region having a size suitable for the moving speed of the moving body without directly grasping the moving state of the moving body.

  Further, an information receiving means for receiving probe information indicating a moving state of the moving body from the moving body, and an event for generating the event information including the event position based on the probe information received by the information receiving means It is preferable to further comprise an information generating means. As a result, event information generated based on the probe information can be distributed, which is an effective support for the moving body.

  According to the event information distribution device according to the present invention, since the area excluding the vicinity area of the event position where the event has occurred is defined as the distribution target area, the area near the event position is being distributed while the event information is being distributed. Can be prevented from passing through the event position. Thereby, even when communication delay occurs, event information can be distributed to an appropriate distribution destination in a timely manner. Further, by narrowing the distribution target area by the neighborhood area, another effect that the data communication amount at the time of distribution processing can be reduced also occurs.

1 is an overall configuration diagram of a safe driving support system incorporating an event information distribution device according to this embodiment. It is an electrical block diagram of the own terminal device shown in FIG. It is an electrical block diagram of the server apparatus shown in FIG. It is a flowchart with which operation | movement description of the own terminal device shown in FIG.1 and FIG.2 is provided. FIG. 5A is a schematic explanatory diagram illustrating an example of a data structure defined by the probe information in FIG. FIG. 5B is a schematic explanatory diagram illustrating an example of a data structure defined by the event information in FIG. It is a flowchart with which operation | movement description of the server apparatus shown in FIG.1 and FIG.3 is provided. It is a schematic explanatory drawing regarding the definition of the grid line on a map. It is a typical front view which shows the positional relationship between an event position, a delivery object area | region, and a near region. It is an enlarged front view of the partial area | region shown in FIG. It is a front view which shows another demarcation result in a delivery object area | region.

  Hereinafter, preferred embodiments of an event information distribution apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

[Description of Safe Driving Support System 10]
<Overall configuration>
FIG. 1 is an overall configuration diagram of a safe driving support system 10 incorporating an event information distribution device according to this embodiment. The safe driving support system 10 includes a server device 12 as an event information distribution device, at least one mobile body (two vehicles in this example), and at least one mobile terminal device (2 in this example). Basically composed of two smartphones).

  Hereinafter, for convenience of explanation, one vehicle (right side of the drawing) is referred to as “own vehicle 14”, and the other vehicle (left side of the drawing) is referred to as “other vehicle 16”. The mobile terminal device mounted on the host vehicle 14 is referred to as “own terminal device 18”, and the mobile terminal device mounted on the other vehicle 16 is referred to as “other terminal device 20”.

  The two base stations 22 and 22 are devices that relay communication between the own terminal device 18 and the server device 12 or communication between the other terminal device 20 and the server device 12. Thereby, the server apparatus 12, the own terminal device 18, and the other terminal device 20 are mutually connected via the wide area network 24 (WAN; Wide Area Network).

<Example of operation>
An example of the operation of the safe driving support system 10 will be described. For example, it is assumed that the other vehicle 16 activates an emergency brake while traveling in front of the host vehicle 14.

  First, the other terminal device 20 mounted on the other vehicle 16 acquires a detection signal that exhibits the same behavior as that of the other vehicle 16, and transmits information including this detection signal (probe information 61 described later; FIG. 2) to the outside. . Thereby, the server device 12 receives the probe information 61 via the base station 22 and the wide area communication network 24.

  Next, the server device 12 analyzes the received probe information 61 in real time, and recognizes the fact that the other vehicle 16 has activated the emergency brake as the occurrence of the “event”. This “event” means an event that prevents or may prevent smooth movement by a moving object.

  Then, the server device 12 broadcasts (or distributes) information including an event occurrence position (event information 62 described later; FIG. 2) to the outside. As a result, the terminal device 18 receives the event information 62 via the wide area communication network 24 and the base station 22.

  Finally, the own terminal device 18 notifies the passenger of the own vehicle 14 that the other vehicle 16 traveling ahead has actuated the emergency brake. In this example, the terminal device 18 outputs a character or voice indicating “HARD BRAKE”. As a result, it is possible to urge the occupant (especially the driver) of the host vehicle 14 to be alerted ahead.

[Electrical Block Diagram of Own Terminal Device 18]
FIG. 2 is an electrical block diagram of the terminal device 18 shown in FIG. The own terminal device 18 is a device that basically includes a terminal side communication unit 30, an information input / output unit 32, a terminal side control unit 34, a terminal side memory 36, and a sensor group 38. The other terminal device 20 may have the same or different configuration from the device configuration shown in the figure.

  The terminal-side communication unit 30 is a communication device that transmits and receives electrical signals to and from an external device by wireless communication. Specifically, a cellular communication unit 40 (wide area communication means) capable of relatively wide area wireless communication (hereinafter also referred to as “wide area wireless communication”) and a relatively narrow area wireless communication (hereinafter “ A wireless LAN communication unit 42 (narrow-area communication means) capable of performing “narrow-area wireless communication”. Thereby, the own terminal device 18 can receive the map information 60 and the event information 62 from the server device 12 (FIG. 1), and can transmit the probe information 61 to the server device 12 (the same drawing).

  Note that the narrow-range wireless communication includes wireless communication (including WiFi), DSRC (Dedicated Short Range Communication), and Bluetooth (registered trademark) that comply with the IEEE 802.11x standard. Wide-area wireless communication includes so-called “3G” (3rd generation mobile communication system), “4G” (4th generation mobile communication system), LTE (Long Term Evolution), WiMAX (Worldwide Interoperability for Microwave Access). It is.

  The information input / output unit 32 includes an input unit 44 and an output unit 46, and inputs or outputs various types of information via an HMI (Human Machine Interface). The output unit 46 includes, for example, a display that outputs visible information and a speaker that outputs audio information. The input unit 44 includes, for example, a touch sensor that inputs a contact position on the display screen and a microphone that inputs audio information.

  The terminal-side control unit 34 is configured by a processor such as an MPU (Micro Processing Unit) or a CPU (Central Processing Unit). The terminal-side control unit 34 can implement the functions of the terminal-side transmission / reception control unit 48, the in-vehicle / out-of-vehicle determination unit 50, and the display data creation unit 52 by reading and executing the program stored in the terminal-side memory 36. is there. The operation of each part will be described later.

  The terminal-side memory 36 stores programs and data necessary for the terminal-side control unit 34 to control each component. In this example, map information 60 indicating the map 100, probe information 61 indicating the movement state of the terminal device 18, and event information 62 indicating events occurring at least on the roads 104 and 106 (FIG. 7) are stored. Has been. The “road” in the present specification means a passage provided for pedestrians, vehicles, and the like to pass through, and is a concept including not only a sidewalk / roadway but also a parking lot.

  The sensor group 38 includes a GPS sensor 64 that detects a signal from a GPS (Global Positioning System) satellite, an acceleration sensor 65 that detects a triaxial acceleration, an angular velocity sensor 66 that detects a triaxial angular velocity, and a geomagnetic sensor that detects an azimuth. 67 is comprised.

[Electrical Block Diagram of Server Device 12]
FIG. 3 is an electrical block diagram of the server device 12 shown in FIG. The server device 12 is a computer that includes a server-side communication unit 70, a server-side control unit 72, a server-side memory 74, and various databases.

  In the server device 12, a database (hereinafter referred to as map information DB 76) storing map information 60 (see FIG. 2) and a database (hereinafter referred to as grid information DB 77) storing grid information indicating grid-like sections on the map 100 are stored. And a database (hereinafter referred to as probe information DB 78; position information storage means) in which probe information 61 (same figure) is stored. The database architecture (for example, the data structure / type and the number of devices used) is not limited to this example, and various designs can be adopted.

  The server-side communication unit 70 is a communication device that transmits and receives electrical signals to and from an external device by wired or wireless communication. Thereby, the server apparatus 12 can receive the probe information 61 from the other terminal apparatus 20 (FIG. 1), and can transmit the map information 60 and the event information 62 to the own terminal apparatus 18 (the same figure).

  The server-side control unit 72 is configured by a processor such as a CPU. The server-side control unit 72 reads out and executes a program stored in the server-side memory 74, whereby a server-side transmission / reception control unit 80 (information receiving unit), a database processing unit 81, a grid line definition unit 82, and an event information generation unit 84 (event information generating means) and each function of the information distribution processing unit 86 can be realized. The information distribution processing unit 86 includes a distribution target area defining unit 88 (distribution target area defining unit) and a distribution destination determining unit 90 (distribution destination determining unit). The operation of each part will be described later.

  The server-side memory 74 stores programs, data, and the like necessary for the server-side control unit 72 to control each component. The server-side memory 74 and the above-described terminal-side memory 36 (FIG. 2) may be configured with non-transitory and computer-readable storage media. Here, the computer-readable storage medium is a portable medium such as a magneto-optical disk, ROM, CD-ROM, or flash memory, or a storage device such as a hard disk built in the computer system. In addition, this storage medium may hold a program dynamically in a short time or may hold a program for a certain period of time.

[Operation of own terminal device 18 or other terminal device 20]
Next, the operation of the terminal device 18 shown in FIGS. 1 and 2 will be described with reference to the flowchart of FIG. Here, the “information output process” for outputting the event information 62 will be mainly described. The other terminal device 20 also executes the same operation as that of the own terminal device 18.

  In step S <b> 1, the terminal-side control unit 34 acquires probe information 61 of the own terminal device 18 (substantially the own vehicle 14 on which the own terminal device 18 is mounted). Specifically, the terminal-side control unit 34 acquires position information from the GPS sensor 64, acceleration information from the acceleration sensor 65, angular velocity information from the angular velocity sensor 66, and azimuth information from the geomagnetic sensor 67, respectively. Alternatively, the inside / outside determination unit 50 determines whether the terminal device 18 is “inside the vehicle” or “outside the vehicle”.

  In step S <b> 2, the terminal side transmission / reception control unit 48 transmits / receives the information set via the cellular communication unit 40. This information set includes not only the probe information 61 acquired in step S1, but also map information 60 and event information 62.

  FIG. 5A is a schematic explanatory diagram illustrating an example of a data structure defined by the probe information 61 of FIG. The probe information 61 includes a terminal ID for identifying the own terminal device 18, a transmission time of the information set, position information of the own terminal device 18, speed information, direction information, or acceleration information, vehicle type information of the own vehicle 14, or Includes inside / outside identifiers. Here, the inside / outside identifier corresponds to an identifier that specifies whether the terminal device 18 is “inside the vehicle” or “outside the vehicle”.

  FIG. 5B is a schematic explanatory diagram illustrating an example of a data structure defined by the event information 62 in FIG. The event information 62 includes an event position 114 (such as FIG. 8) indicating the position coordinates (latitude / longitude) where the event occurred, or an event attribute relating to the event type / information freshness. When a plurality of events (for example, first to third events) occur simultaneously, event information 62 for each event is provided.

  Specific examples of event types include (1) approach of vehicles including emergency vehicles, (2) various information from other vehicles 16 (for example, operation of emergency brakes), and (3) accident warning points including intersections. Arrival, (4) arrival at an emergency braking frequent point including an intersection, (5) arrival at an obstacle location, (6) traffic information including the end position, and the like.

  In step S <b> 3, the terminal side transmission / reception control unit 48 determines whether or not the event information 62 from the server device 12 has been received via the cellular communication unit 40. When it is determined that there is reception (step S3: YES), the process proceeds to the next step (S4). On the other hand, when it is determined that there is no reception (step S3: NO), the execution of step S4 is omitted.

  In step S4, the information input / output unit 32 outputs the event information 62 received in step S2. Prior to output, the display data creation unit 52 reads the map information 60 and the event information 62 stored in the terminal-side memory 36 and creates display data for display. Then, the output unit 46 outputs image information including a part of the map 100 based on the created display data.

  In step S <b> 5, the terminal-side control unit 34 determines whether an operation for ending the running application has been received. When it is determined that there is no operation yet (step S5: NO), the process returns to step S1 and steps S1 to S5 are sequentially repeated. On the other hand, when it determines with having received operation (step S5: YES), operation | movement of the own terminal device 18 regarding an information output process is complete | finished.

[Operation of Server Device 12]
Next, the operation of the server device 12 shown in FIGS. 1 and 3 will be described with reference to the flowchart of FIG. Here, the description will focus on “information distribution processing” for distributing the event information 62.

  Prior to this information distribution process, the grid line defining unit 82 of the server device 12 defines in advance a grid line for roughly specifying the position on the map 100.

  FIG. 7 is a schematic explanatory diagram relating to the definition of grid lines on the map 100. In the partial area 102 of the map 100, there is at least a wide road 104 extending in the left-right direction, a wide road 106 extending in the up-down direction, and an intersection 108 where the two roads 104, 106 are substantially orthogonal to each other. .

  For example, the partial region 102 is partitioned into a plurality of square cells 110 by defining equidistant grid lines along the horizontal direction and the vertical direction. The size of one side of the cell 110 is set to any one of, for example, 10 m, 100 m, 1 km, 10 km, and 100 km. The shape of the cell 110 is not limited to a square, but may be a polygon such as a rectangle including a rectangle and a rhombus, a triangle, and a hexagon.

  In step S <b> 11 of FIG. 6, the server-side transmission / reception control unit 80 receives probe information 61 from the mobile body (own vehicle 14) carrying the terminal device 18 via the server-side communication unit 70. Thereafter, the database processing unit 81 stores the latest received probe information 61 in the probe information DB 78 and updates the database related to the probe information 61. Note that this reception process is executed synchronously or asynchronously with one or a plurality of mobile terminal apparatuses.

  In step S12, the event information generation unit 84 refers to the probe information DB 78 updated in step S11, and detects the presence or absence of an event that has actually occurred (or that may occur soon). For this detection method, various known analysis methods including statistical methods may be employed. For example, as a result of analyzing the probe information 61, it is assumed that an event related to “arrival at the intersection 108 (FIG. 7) where frequent emergency braking occurs” is detected.

  In step S13, the server-side control unit 72 determines whether an event has occurred based on the detection result in step S12. When it is determined that there is at least one event (step S13: YES), the process proceeds to the next step (S14). On the other hand, when it is determined that there is no event (step S13: NO), steps S14 to S17 described later are omitted.

  In step S14, the event information generation unit 84 specifies the event position 114 (FIG. 8 and the like) from the detection result obtained in step S12, and generates event information 62 including the event position 114 based on the probe information 61. To do. As a result, the event information 62 generated based on the probe information 61 can be distributed, which is an effective support for the moving body.

  In step S15, the distribution target area defining unit 88 defines the distribution target area 116 in which the event information 62 generated in step S14 is distributed with the event position 114 as a reference.

  FIG. 8 is a schematic front view showing the positional relationship among the event position 114, the distribution target area 116, and the neighboring area 120. A rectangular frame indicated by a solid line indicates the entire area 112 of the map 100. Moreover, the rectangular frame shown with a broken line shows the partial area | region 102 (FIG. 7) which comprises a part of whole area | region 112. FIG.

  One event position 114 exists in the approximate center of the entire area 112. The distribution target area 116 is an annular area surrounded by concentric boundary lines 117 and 118 with the event position 114 as the center. In other words, the distribution target area 116 corresponds to an area surrounded by the boundary line 117 having the radius R1 and excluding the neighboring area 120 surrounded by the boundary line 118 having the radius R2 (R2 <R1). To do.

  FIG. 9 is an enlarged front view of the partial region 102 shown in FIG. Here, for convenience of illustration, the notation of grid lines partitioning the cells 110 is omitted. As can be understood from this figure, each of the distribution target area 116 and the neighboring area 120 is an area configured by one or a plurality of cells 110.

  The neighborhood area 120 includes the event position 114 and is a collection of positions close to the event position 114. The size of the neighboring region 120 is defined by, for example, a size in real space (for example, 500 m) or the number of cells 110 (for example, equivalent to 10).

  In step S16 of FIG. 6, the delivery destination determination unit 90 refers to the position information read from the probe information DB 78, and thereby selects one or more moving objects existing in the delivery target area 116 defined in step S15. The distribution destination of the event information 62 is determined. For example, the distribution destination determination unit 90 sets a mobile terminal device (the own terminal device 18 or the other terminal device 20) that exists in the distribution target area 116 and has an in-vehicle / outside identifier of “in-vehicle” as a distribution destination.

  In step S17, the server-side transmission / reception control unit 80 distributes (collectively transmits) the event information 62 to the distribution destination determined in step S16. Thereafter, the mobile terminal device existing in the distribution target area 116 receives the information set from the server device 12 (step S2 in FIG. 4), and causes the information input / output unit 32 to output the event information 62 included in the information set. (Step S4 in the figure).

  In step S <b> 18, the server-side control unit 72 determines whether an operation for ending the application being executed has been received. When it is determined that there is no operation yet (step S18: NO), the process returns to step S11, and steps S11 to S18 are sequentially repeated. On the other hand, when it is determined that there has been an operation (step S18: YES), the operation of the server device 12 relating to the information distribution processing ends.

[Another definition]
By the way, the distribution target area 116 and / or the vicinity area 120 is not limited to the example shown in FIGS. 8 and 9, and various forms (shape and size) may be adopted.

<First example>
The boundary lines 117 and 118 that define the distribution target region 116 are not limited to concentric circles, and may have a shape in which one or a plurality of straight lines or curves are combined. For example, it may be an ellipse, a quadrangle including a square, a rectangle or a rhombus, a polygon such as a triangle or a hexagon.

<Second example>
It is desirable that the server device 12 is originally distributed only to distribution destinations that require the event information 62. Accordingly, the distribution target area defining unit 88 may demarcate the distribution target area 122 where there is a high possibility that a moving object is present.

  As shown in FIG. 10, one event position 114 exists at the approximate center (intersection 108) of the partial region 102. Four distribution target areas 122 are arranged on the right, left, upper, and lower sides of the event position 114, respectively. Each distribution target area 122 is an area excluding the vicinity area 120 including the event position 114, like the distribution target area 116 of FIG. Each distribution target area 122 includes a plurality of cells 110 including a part of the roads 104 and 106 belonging to the event position 114.

  As described above, the distribution target area defining unit 88 may define the distribution target area 122 that covers only the roads 104 and 106 that are close to the event position 114. As a result, it becomes possible to determine only a mobile body existing on (or in the vicinity of) the roads 104 and 106 as a distribution destination, and the amount of data communication during the distribution process can be greatly reduced.

<Third example>
The server device 12 is desirably distributed in consideration of the time until the event position 114 is reached. Therefore, the distribution target area defining unit 88 may change the size of the vicinity area 120 according to the speed limit VL of the roads 104 and 106 to which the event position 114 belongs. Specifically, R1 = k1 · VL and R2 = k2 · VL are obtained using positive coefficients k1 and k2 (where k1> k2), and then the annular distribution target area 116 shown in FIG. Is defined.

  Generally speaking, there is a high correlation between the speed of the moving body existing on the roads 104 and 106 and the speed limit VL of the roads 104 and 106. That is, the neighborhood region 120 having a size suitable for the moving speed of the moving body can be excluded without directly grasping the moving state of the moving body.

<Fourth example>
In the example of FIGS. 9 and 10, the distribution target area defining unit 88 defines the distribution target areas 116 and 122 in units of cells 110 partitioned by grid lines, but is not limited to this form. For example, the distribution target areas 116 and 122 may be areas configured in units of districts, areas, or road links.

[Effects of this server device 12]
As described above, the server device 12 includes the probe information DB 78 that stores position information in one or a plurality of moving bodies (the host vehicle 14 and the other vehicle 16) and the distribution target areas 116 and 122 that distribute the event information 62. One or more moving objects existing in the distribution target areas 116 and 122 are determined as distribution destinations of the event information 62 by referring to the distribution target area defining unit 88 to be defined and the position information read from the probe information DB 78. And a delivery destination determination unit 90.

  Then, the distribution target area defining unit 88 defines the areas excluding the vicinity area 120 of the event position 114 where the event occurred as distribution target areas 116 and 122. With this configuration, it is possible to prevent a moving body existing in the vicinity of the event position 114 from passing through the event position 114 while the event information 62 is being distributed. As a result, even when a communication delay occurs, the event information 62 can be distributed to an appropriate distribution destination in a timely manner. Further, by narrowing the distribution target areas 116 and 122 by the neighborhood area 120, another effect that the amount of data communication during the distribution process can be reduced also occurs.

[Supplement]
In addition, this invention is not limited to embodiment mentioned above, Of course, it can change freely in the range which does not deviate from the main point of this invention.

  In the present embodiment, a four-wheeled vehicle (a vehicle in a narrow sense) is exemplified as a moving body, but the present invention is not limited to this, and can be widely applied to objects or living bodies (including humans). Examples of the moving body of the object include a vehicle in a broad sense including a two-wheeled vehicle, a ship, an aircraft, an artificial satellite, and the like.

DESCRIPTION OF SYMBOLS 10 ... Safe driving support system 12 ... Server apparatus 14 ... Own vehicle 16 ... Other vehicle 18 ... Own terminal device 20 ... Other terminal device 22 ... Base station 24 ... Wide area communication network 30 ... Terminal side communication part 32 ... Information input / output part 34 Terminal side control unit 36 Terminal side memory 38 Sensor group 40 Cellular communication unit 42 Wireless LAN communication unit 48 Terminal side transmission / reception control unit 50 Inside / outside determination unit 60 Map information 61 Probe information 62 Event information 70 ... Server side communication unit 72 ... Server side control unit 74 ... Server side memory 76 ... Map information DB
77 ... Grid information DB 78 ... Probe information DB
DESCRIPTION OF SYMBOLS 80 ... Server side transmission / reception control part 81 ... Database processing part 82 ... Grid line definition part 84 ... Event information generation part 86 ... Information distribution processing part 88 ... Distribution object area | region definition part 90 ... Distribution destination determination part 100 ... Map 102 ... Partial area 104, 106 ... road 108 ... intersection 110 ... cell 112 ... entire area 114 ... event position 116, 122 ... distribution target area 120 ... neighborhood area

Claims (3)

An event information distribution device that distributes event information indicating an event that has occurred at least on a road,
Position information storage means for storing position information on one or more moving objects;
A distribution target area defining means for defining a distribution target area for distributing the event information;
By referring to the position information read from the position information storage unit, one or more moving objects existing in the distribution target area defined by the distribution target area defining unit are transferred to the event information distribution destination. Distribution destination determining means for determining as
The distribution target area defining means defines, as the distribution target area, an area excluding a vicinity area of an event position where the event has occurred. The event information distribution device according to claim 1,
The event information distribution device, wherein the distribution target area defining means changes a size of the neighboring area according to a speed limit of the road to which the event position belongs. In the event information distribution device according to claim 1 or 2,
Information receiving means for receiving probe information indicating the moving state of the moving body from the moving body;
An event information distribution device further comprising: event information generation means for generating the event information including the event position based on the probe information received by the information reception means.

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