JP6645942B2 - Map data distribution device, map data distribution method and program - Google Patents

Description

  The present invention relates to a map data distribution device that distributes map data, a map data distribution method, and a program.

  Probe information indicating the trajectory of a car is used for distribution of map data. Patent Literature 1 discloses a technique for distributing map data based on the number of travels on a newly opened road detected based on probe information.

  In the technology described in Patent Document 1, the number of travels of a vehicle on a newly opened road is detected based on probe information, and a priority is set for the newly opened road based on the detected number of travels. Distribute high newly opened road map data.

Japanese Patent No. 4797978

  However, the technology described in Patent Literature 1 determines the priority order based only on the number of vehicles traveled on a newly opened road. In such a case, the map data of the newly opened road may not be distributed.

  In view of the above problems, an object of the present invention is to provide a map data distribution device, a map data distribution method, and a map data distribution method capable of distributing map data including a newly opened road useful for an area while reducing the load on a system that distributes map data. To provide a program.

  A map data distribution device according to an embodiment of the present invention includes a distribution unit that distributes map data for each of a plurality of regions separated by a rectangle, a detection unit that detects a traffic volume in an area around a newly opened road, A determining unit that determines whether or not to distribute map data of an area including the newly opened road among the plurality of areas based on the traffic volume of the surrounding area detected by the detecting unit; Is characterized in that map data of an area including the newly opened road is distributed based on a determination result of the determination unit.

  A map data distribution method according to an embodiment of the present invention includes a distribution step of distributing map data for each of a plurality of areas divided by a rectangle, a detection step of detecting a traffic volume in an area around a newly opened road, A determination step of determining whether or not to distribute map data of an area including the newly opened road among the plurality of areas based on the traffic volume of the surrounding area detected by the unit. And distributing map data of an area including the newly opened road based on a result of the determination in the determining step.

  A program according to an embodiment of the present invention includes a distribution step of distributing map data for each of a plurality of areas separated by a rectangle, a detection step of detecting a traffic volume in an area around a newly opened road, Determining whether to distribute map data of an area including the newly opened road out of the plurality of areas based on the traffic volume of the surrounding area. A computer is made to execute distribution of map data of an area including the newly opened road based on a determination result in the process.

  According to the present invention, it is possible to provide a map data distribution device, a map data distribution method, and a program capable of distributing map data including a newly opened road useful for an area while reducing the load on a map data distribution system. it can.

FIG. 1 is a diagram illustrating a configuration example of a map distribution system 1 according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration example of map data distributed by a server device 2 according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration example of a server device 2 according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration example of map data distributed by a server device 2 according to the first embodiment of the present invention. FIG. 5 is a diagram illustrating another configuration example of map data distributed by the server device 2 according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration example of a mobile terminal device 3 according to the first embodiment of the present invention. 5 is a flowchart illustrating an operation example of the server device 2 according to the first embodiment of the present invention. 5 is a flowchart illustrating an operation example of the mobile terminal device 3 according to the first embodiment of the present invention. It is a figure in the 2nd Embodiment of this invention which shows the structural example of the map data which the server apparatus 2 distributes. It is a flow chart which shows an example of operation of server device 2 in a 2nd embodiment of the present invention. FIG. 13 is a diagram illustrating a configuration example of a server device 2 according to a third embodiment of the present invention. 11 is a flowchart illustrating an operation example of the server device 2 according to the third embodiment of the present invention.

<First embodiment>
A first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration example of a map distribution system 1 according to the first embodiment of the present invention. As shown in FIG. 1, the map distribution system 1 includes a server device 2, a mobile terminal device 3, and an NW (Network) 4.

  The server device 2 is a device for delivering map data to the mobile terminal device 3. The server device 2 is, for example, a so-called server device or computer (for example, desktop, laptop, tablet, or the like). Note that, in the first embodiment of the present invention, the server device 2 is not limited to these.

  The server device 2 distributes the map data to the mobile terminal device 3 at a predetermined timing. The predetermined timing may be any period, such as a predetermined cycle, a predetermined date and time, when map data to be distributed is created, or when requested by a user.

  In the first embodiment of the present invention, the server device 2 distributes map data divided into a mesh having a hierarchical structure to the mobile terminal device 3. The server device 2 distributes, for example, map data obtained by dividing a country, a prefecture, a state, and the like into a mesh shape to the mobile terminal device 3. Further, the server device 2 distributes, to the mobile terminal device 3, map data divided into a mesh shape hierarchized for a plurality of different scales.

  The map data distributed by the server device 2 is, for example, parcel data or region data. The parcel data is data mainly used for drawing a map, searching for facilities, and the like, and exists, for example, in a rectangular unit obtained by dividing a predetermined area into a mesh. The region data is mainly used for route search and the like, and exists, for example, in a rectangular unit obtained by dividing a predetermined region into a mesh. In the first embodiment of the present invention, a case where the server device 2 distributes parcel data will be described as an example. However, map data distributed by the server device 2 is not limited to parcel data. Or other map data).

  FIG. 2 is a diagram illustrating a configuration example of map data distributed by the server device 2. As shown in FIG. 2, the server device 2 distributes map data for each predetermined area 7 obtained by dividing a specific area 6 into a mesh. The map data corresponding to the predetermined area 7 is, for example, parcel data and is rectangular map data divided in units of 100 to 1,000 [m]. The unit of the parcel data division is not limited to 100 to 1,000 [m], but may be any unit.

  The server device 2 specifies a predetermined area 7 to which the map data is to be distributed from a plurality of predetermined areas 7 included in the specific area 6, and distributes the map data of the specified predetermined area 7. The server device 2 specifies a predetermined area 7 including, for example, “road” or “track”, and distributes map data corresponding to the specified predetermined area. In addition, the server device 2 may distribute all of the plurality of predetermined areas 7 included in a certain area.

  In the first embodiment of the present invention, the server device 2 specifies the predetermined area 7 whose contents have been changed, and determines whether or not to update the map data of the specified predetermined area 7; The necessity of map data distribution is determined based on the determination result. The change of the content is, for example, that a new road has been opened, that is, there is a newly opened road. Further, the change of the content is not limited to the newly opened road, but may be, for example, the provision of a new “bridge” or “tunnel”. Further, the change of the content may be, for example, that a new building has been constructed or that existing roads have been abolished. In the following, the change of the content will be described as a newly opened road.

  The mobile terminal device 3 is, for example, a device (car navigation device) that can provide services related to a car navigation system. The mobile terminal device 3 is not limited to a car navigation device, and may be, for example, a smartphone or a mobile phone (for example, a feature phone), a computer (for example, a desktop, laptop, tablet, or the like), a PDA (personal digital assistant), or a wearable terminal. And so on. Note that, in the first embodiment of the present invention, the mobile terminal device 3 is not limited to these.

  The mobile terminal device 3 is a device that moves together with the mobile body 5 such as an automobile, a bus, a motorcycle, and a train. The mobile terminal device 3 may be, for example, installed on the mobile unit 5 or may be assumed to be held by a user who drives the mobile unit 5. The mobile terminal device 3 is not limited to a device that moves with the moving object 5, but may be any device such as a device that moves with the user or a device that is fixed at a predetermined place.

  The mobile terminal device 3 receives the map data from the server device 2 at a predetermined timing. The mobile terminal device 3 updates the stored map data based on the received map data. In addition, the mobile terminal device 3 presents the map data including the updated map data to the user of the map distribution system 1 by displaying the map data.

  The NW 4 is a communication network for connecting the server device 2 and the mobile terminal device 3. The server device 2 distributes the map data to the mobile terminal device 3 via the NW 4. The NW 4 is, for example, a wired network or a wireless network. Specifically, NW4 is a wireless LAN (wireless LAN: WLAN), a wide area network (WAN), ISDNs (integrated service digital networks), wireless LANs, LTE (long term communication DMA, long term communication DMA, multimedia communication, LTE) access). The NW 4 is not limited to these examples, and may be, for example, a public switched telephone network (PSTN), Bluetooth (Bluetooth (registered trademark)), satellite communication, or the like. There may be.

  FIG. 3 is a diagram illustrating a configuration example of the server device 2 according to the first embodiment of the present invention. As illustrated in FIG. 3, the server device 2 includes a communication unit 20, a control unit 21, a map data storage unit 26, and a probe information storage unit 25.

  The communication unit 20 is a communication interface for connecting to the mobile terminal device 3. The server device 2 transmits the map data to the mobile terminal device 3 via the communication unit 20. Further, the server device 2 receives predetermined information (for example, probe information described later) via the communication unit 20. The communication performed by the communication unit 20 may be any of wired and wireless communication, and may use any communication protocol.

  The control unit 21 has a function of executing a predetermined function by a code or an instruction in a program, and is, for example, a central processing unit (CPU). In addition, the control unit 21 may be, for example, a microprocessor (multiprocessor), a multiprocessor, an ASIC (application-specific integrated circuit), or an FPGA (field programmable gate array). Note that, in the first embodiment of the present invention, the control unit 21 is not limited to these.

  As shown in FIG. 3, the control unit 21 includes a detection unit 22, a determination unit 23, and a distribution unit 24.

  The detection unit 22 detects a traffic volume in a peripheral area of a specific place. The specific place is, for example, a place where a new road is opened, that is, a newly opened road.

  The detection unit 22 detects the traffic volume in the area around the newly opened road. The peripheral area is, for example, an area within a predetermined range from the newly opened road. The predetermined range is, for example, an area within 5 [Km] from the newly opened road. The predetermined range is not limited to 5 [Km] but may be any range such as 10 [Km]. In addition, the predetermined range may be, for example, an area (the area 71 in FIG. 4) including the newly opened road in the map data. Further, the peripheral area may be, for example, an area (area 70 in FIG. 4) adjacent to the newly opened road. The peripheral region is not limited to these examples, and may be any range.

  The detection unit 22 detects the traffic volume in the area around the newly opened road based on the probe information. The probe information is information for obtaining a traveling locus of the moving body 5. The probe information is, for example, information that associates an identifier capable of identifying the moving object 5, position information indicating the position of the moving object 5, and the time at which the moving object 5 exists at the position. The identifier of the mobile unit 5 is, for example, an ID (Identifier) that can uniquely identify the mobile unit 5. The position information of the moving object 5 can be collected by, for example, a GPS (Global Positioning System). The traveling locus of the moving body 5 can be obtained based on the position information and the time of the moving body 5 included in the probe information.

  The detection unit 22 detects the traffic volume in the peripheral area of the newly opened road based on the probe information of the moving object 5 in the peripheral area. The detection unit 22 detects the traffic volume in the area around the newly opened road with reference to the probe information storage unit 25 that stores the probe information received from the plurality of mobile units 5.

  The detection unit 22 detects, for example, the amount (number) of probe information in the peripheral area per unit time as the traffic volume in the peripheral area. The amount (number) of the probe information per unit time in the peripheral area corresponds to the number of traveling of the moving body 5 per unit time in the peripheral area.

  The detecting unit 22 may detect the traffic volume in the surrounding area based on the probe information including (or being a predetermined attribute) of the predetermined attribute in the probe information. The predetermined attribute is, for example, an attribute of a user who operates the moving body 5 or an attribute of the moving body 5.

  The attributes of the user may be, for example, the user's age, gender, height, weight, and the like. Further, the attribute of the user may be, for example, the frequency with which the user uses the moving object 5 (every day, only on weekends and holidays, several times a month, etc.).

  Further, the attribute of the user may be a driving situation of the moving body 5 by the user. The driving state of the moving body 5 may be, for example, how to use the accelerator (whether there is a lot of sudden start) or how to use the brake (whether there is a lot of sudden stop). The driving state of the moving body 5 can be obtained, for example, based on the use state of the accelerator, the brake, and the steering wheel of the moving body 5 by the user.

  Further, the predetermined attribute may be, for example, the size, weight, type (private car, sports car, bus, truck, etc.) of the moving body 5. The attribute of the moving object 5 can be specified on the server device 2 side, for example, by an ID included in the probe information. The predetermined attribute may be environmental information, such as the time (morning, noon, night) when the probe information was collected, the weather (clear, rain, cloudy, etc.), temperature, and the like. . The environmental information can also be obtained based on the usage status of the air conditioner, the wiper, and the like in the moving object 5. For example, when the air conditioner is used, it can be determined that “the temperature is high”, and when the wiper is used, it can be determined that the weather is rain.

  The detection unit 22 obtains a traveling locus of the moving body 5 based on probe information including a predetermined attribute (or a predetermined attribute) in the probe information. The detection unit 22 detects the traffic volume in the area around the newly opened road based on the obtained travel locus of the moving object 5. For example, the detection unit 22 obtains a traveling locus of the private vehicle based on the probe information of the private vehicle, and detects the traffic volume of the private vehicle in an area around the newly opened road. In addition, the detection unit 22 obtains a traveling locus of the moving body 5 on a rainy day based on, for example, probe information of the moving body 5 on a rainy day, and newly detects a traveling locus of the moving body 5 on the rainy day. Detects the traffic volume in the area around the open road.

  As described above, by detecting the traffic volume in the surrounding area of the newly opened road based on the probe information including the predetermined attribute (or the predetermined attribute), from various viewpoints, the traffic of the newly opened road is determined. The usefulness of the peripheral area can be determined.

  The traffic amount detected by the detection unit 22 is not limited to a specific numerical value, and information such as "large" or "small" may be detected. The detection unit 22 detects that the traffic volume in the peripheral area is “high” based on, for example, that the probe information in the peripheral area is equal to or more than a predetermined amount. Further, the detection unit 22 detects that the traffic volume in the peripheral area is “small” based on, for example, that the probe information in the peripheral area is less than a predetermined amount. Note that the traffic volume in the surrounding area may be indicated not by two levels of “large” or “small” but by three or more levels divided more finely.

  The determination unit 23 determines whether or not to distribute the map data of the area including the newly opened road (the area 71 in FIG. 4) based on the traffic in the area around the newly opened road detected by the detection unit 22. . The determining unit 23 determines that the map data of the area (the area 71 in FIG. 4) including the newly opened road is to be delivered when the traffic volume in the surrounding area is equal to or larger than the predetermined threshold. Further, the determining unit 23 may determine not to distribute the map data of the area including the newly opened road (the area 71 in FIG. 4) when the traffic volume in the surrounding area is less than the predetermined threshold.

  In addition, when the detecting unit 22 detects that the traffic volume in the surrounding area is “high”, the determining unit 23 determines that the map data of the area including the newly opened road (the area 71 in FIG. 4) is to be distributed. The determining unit 23 may determine that the map data of the predetermined area 7 including the newly opened road is not to be distributed when the detecting unit 22 detects that the traffic volume in the surrounding area is “small”.

  When the traffic volume in the peripheral area of the newly opened road is equal to or more than a predetermined threshold value or the traffic volume in the peripheral area is “large”, it is estimated that the traffic volume of the newly opened road is also increased. 6 is assumed to be highly useful. Conversely, when the traffic volume in the surrounding area is less than the predetermined threshold value or when the traffic volume in the surrounding area is “small”, it is estimated that the traffic volume of the newly opened road is reduced, and the newly opened road is in the specific area 6. Is considered to be of low utility.

  In the first embodiment of the present invention, the determination unit 23 determines that the traffic volume in the peripheral area of the newly opened road is equal to or larger than a predetermined threshold value or the traffic volume in the peripheral area is “high”, When it is assumed that the road is highly likely, map data of an area including the newly opened road is distributed.

  The distribution unit 24 distributes the map data of the area including the newly opened road (the area 71 in FIG. 4) based on the determination result of the determination unit 23. When the deciding unit 23 decides to distribute the map data of the predetermined area 7 including the newly opened road, the distribution unit 24 distributes the map data of the area including the newly opened road (the area 71 in FIG. 4). When there are a plurality of areas (the area 71 in FIG. 4) including the newly opened road, the distribution unit 24 distributes the map data of the plurality of areas (the area 71 in FIG. 4). Note that, when the determining unit 23 determines that the map data of the area including the newly opened road (the area 71 in FIG. 4) is not to be distributed, the distribution unit 24 determines the area including the newly opened road (the area 71 in FIG. 4). ) Does not distribute map data.

  FIG. 4 is a diagram illustrating a configuration example of map data distributed by the server device 2. As shown in FIG. 4, the server device 2 distributes map data for each predetermined area 7 obtained by dividing a specific area 6 into a mesh. As shown in FIG. 4, the specific area 6 includes a newly opened road X and existing roads A to C.

  The detection unit 22 detects, for example, the traffic volume in the area 70 adjacent to the newly opened road X as the traffic volume in the area around the newly opened road X. The detection unit 22 may detect the traffic volume in the area 71 including the newly opened road X in addition to the area around the newly opened road X.

  In FIG. 4, the determining unit 23 determines whether or not to distribute the map data of the area 71 including the newly opened road X based on the traffic volume of the area 70 adjacent to the newly opened road X detected by the detecting unit 22. decide.

  Then, the distribution unit 24 distributes the map data of the area 71 including the newly opened road X based on the determination result of the determination unit 23. The distribution unit 24 distributes the map data of the area 71 including the newly opened road X, for example, when the determination unit 23 determines to distribute.

  FIG. 5 is a diagram illustrating a configuration example of map data distributed by the distribution unit 24. As illustrated in FIG. 5, the distribution unit 24 transmits the map data of the area 72 including the existing roads A to C and the map data of the area 71 including the newly opened road X determined to be distributed by the determination unit 23 to the mobile terminal. It is delivered to the device 3. When the deciding unit 23 decides not to distribute the map data of the area 71 including the newly opened road X, the distribution unit 24 distributes the map data of the area 72 including the existing roads A to C.

  Note that the distribution unit 24 may distribute, to the mobile terminal device 3, for example, map data whose contents have been changed among the map data of the area 72 including the existing roads A to C.

  The distribution unit 24 distributes map data for each of a plurality of areas, as shown in FIG. The distribution unit 24 may distribute the map data to be distributed all at once, or may distribute the data at appropriate times. The distribution unit 24 distributes the map data at a predetermined period, a predetermined date and time, when map data to be distributed is created, when requested by the user, It may be any case, such as when the distribution is determined.

  The probe information storage unit 25 stores probe information that is information indicating a traveling locus of the moving object 5. The probe information storage unit 25 stores probe information of a plurality of moving objects 5. The probe information storage unit 25 stores probe information received by the server device 2 via the communication unit 20.

  Note that the server device 2 may receive the probe information from all or some of the plurality of moving objects 5. Further, the server device 2 may receive the probe information from a probe car which is a specific automobile for collecting the probe information. Further, instead of receiving the probe information from the moving object 5, the server device 2 may receive the probe information from another system or another server device that provides the probe information.

  The map data storage unit 26 stores map data. The map data storage unit 26 stores, for example, map data of a specific region such as a specific country, prefecture, or state. The map data storage unit 26 stores, for example, map data divided into a mesh having a hierarchical structure for a specific area. The map data stored in the map data storage unit 26 is, for example, the latest map data. The latest map data is, for example, map data in which all items whose contents have been changed are reflected. The latest map data is, for example, map data that reflects all newly opened roads X in a specific area. Note that the map data stored in the map data storage unit 26 does not necessarily need to be the latest map data, and may be any map data.

  The map data stored in the map data storage unit 26 is updated to the latest map data at a predetermined timing, for example. The predetermined timing may be any timing, such as when the latest map data is created or a predetermined cycle.

  FIG. 6 is a diagram illustrating a configuration example of the mobile terminal device 3 according to the first embodiment of the present invention. As shown in FIG. 6, the mobile terminal device 3 includes a communication unit 30, a control unit 31, a map data storage unit 35, a GPS 36, and a display device 37.

  The communication unit 30 is a communication interface for connecting to the server device 2. The mobile terminal device 3 receives map data from the server device 2 via the communication unit 30. In addition, the mobile terminal device 3 transmits probe information to the server device 2 via the communication unit 30. The communication performed by the communication unit 30 may be any of wired and wireless communication, and may use any communication protocol.

  The control unit 31 has a function of executing a predetermined function by a code or an instruction in a program, and is, for example, a central processing unit (CPU). Further, the control unit 31 may be, for example, a microprocessor, a multiprocessor, an ASIC, an FPGA, or the like. Note that, in the first embodiment of the present invention, the control unit 31 is not limited to these.

  As illustrated in FIG. 6, the control unit 31 includes an update unit 32, a display processing unit 33, and a notification unit 34.

  The update unit 32 updates the map data stored in the map data storage unit 35 based on the map data received from the server device 2. The update unit 32 receives the map data of the area 71 including the newly opened road X, for example, and updates the map data stored in the map data storage unit 35. The update unit 32 receives the map data of the area 72 including the existing roads A to C, for example, and updates the map data stored in the map data storage unit 35.

  The update unit 32 compares, for example, the map data received from the server device 2 with the map data stored in the map data storage unit 35, and updates the map data for the map data having a difference. You may.

  The display processing unit 33 creates display data for displaying a map on the display device 37 based on the map data stored in the map data storage unit 35. The display processing unit 33 creates display data for displaying a map on the display device 37 based on, for example, the current position of the mobile terminal device 3. The display processing unit 33 creates display data for displaying a map on the display device 37 based on a request of the user of the mobile terminal device 3.

  The display processing unit 33 may create display data for displaying traffic congestion information and the like on the map in addition to the map. The display processing unit 33 creates display data for displaying various information on the display device 37 in addition to the map.

  The notification unit 34 notifies the server device 2 of the current position of the mobile terminal device 3 via the communication unit 30. The notification unit 34 notifies the server device 2 of the current position of the mobile terminal device 3 collected by the GPS 36.

  The notification unit 34 may notify the server device 2 of information in which the current position of the mobile terminal device 3 collected by the GPS 36 is associated with the collection time. The notification unit 34 may create probe information based on the current position of the mobile terminal device 3 collected by the GPS 36 and the collection time, and notify the server device 2 of the probe information.

  The notification unit 34 may notify the server device 2 of the current position of the mobile terminal device 3 at a predetermined timing. Note that the predetermined timing may be any timing such as a predetermined cycle or an arbitrary timing.

  The map data storage unit 35 stores map data. The map data includes information used for drawing a map. For example, the map data includes a metafile and image data as information for drawing a map. The map data includes information used for facility search. For example, the map data includes information in which the name of a facility is associated with the location of the facility, and can be used for a facility search. The map data includes information on road elements for defining map information such as links and nodes. For example, the map data includes road network data including a link indicating a road and a node that is a connection point between the link and the link. In the road network data, links represent expressways and national roads, and nodes represent intersections and the like. The map data storage unit 35 stores, for example, map data for a specific region such as a specific country, prefecture, or state. The map data storage unit 35 stores, for example, map data divided into a mesh having a hierarchical structure for a specific area. Further, the map data storage unit 35 stores the map data updated by the map data received from the server device 2.

  The GPS 36 has a function for collecting the current position of the mobile terminal device 3. The GPS 36 collects the current position of the mobile terminal device 3 at a predetermined timing, for example. The predetermined timing may be any timing such as a predetermined cycle or an arbitrary timing.

  The display device 37 displays map data and the like based on the display data created by the display processing unit 34.

  FIG. 7 is a flowchart illustrating an operation example of the server device 2 when map data is distributed.

  The detection unit 22 of the server device 2 detects the traffic volume in the area around the newly opened road X (S101). The detection unit 22 detects the traffic volume in the area around the newly opened road X based on the probe information stored in the probe information storage unit 25, for example.

  The determination unit 23 determines whether or not to distribute the map data of the area 71 including the newly opened road X based on the traffic in the area around the newly opened road X detected by the detection unit 22 (S102). The determining unit 23 determines that the map data of the area 71 including the newly opened road X is to be distributed, for example, when the traffic volume in the area around the newly opened road X is equal to or larger than a predetermined threshold. On the other hand, the determining unit 23 determines not to distribute the map data of the area 71 including the newly opened road X, for example, when the traffic volume in the area around the newly opened road X is less than the predetermined threshold.

  When the deciding unit 23 decides to distribute the map data of the area 71 including the newly opened road X (YES in S102), the distribution unit 24 adds the new map data to the map data of the area 72 including the existing roads A to C. The map data of the area 71 including the open road X is distributed to the mobile terminal device 3 (S103).

  On the other hand, when the deciding unit 23 decides not to distribute the map data of the area 71 including the newly opened road X (NO in S102), the distribution unit 24 distributes the map data of the area 71 including the newly opened road X. First, map data of the area 72 including the existing roads A to C is delivered (S104).

  FIG. 8 is a flowchart illustrating an operation example of the mobile terminal device 3 when map data is received.

  The communication unit 20 of the mobile terminal device 3 receives the map data from the server device 2 (S201).

  The updating unit 32 of the mobile terminal device 3 updates the map data stored in the map data storage unit 35 based on the map data received from the server device 2 (S202). The update unit 32 receives the map data of the area 71 including the newly opened road X, for example, and updates the map data stored in the map data storage unit 35. The update unit 32 compares the map data received from the server device 2 with the map data stored in the map data storage unit 35, and updates the map data for the map data having a difference. Good.

  The display processing unit 33 creates display data for displaying a map on the display device 37 based on the map data stored in the map data storage unit 35 (S203). The display processing unit 33 may create display data for displaying traffic congestion information and the like on the map in addition to the map.

  The display processing unit 33 displays a map on the display device 37 based on the created display data (S204).

  As described above, in the first embodiment of the present invention, the server device 2 determines whether or not to distribute the map data of the area 71 including the newly opened road X based on the traffic volume in the area around the newly opened road X. To decide. Then, when the traffic volume in the surrounding area is equal to or more than the predetermined threshold, the server device 2 determines that the map data of the area 71 including the newly opened road X is to be distributed. On the other hand, when the traffic volume in the surrounding area is less than the predetermined threshold, the server device 2 determines not to distribute the map data of the area 71 including the newly opened road X.

  As described above, in the first embodiment of the present invention, even if there is a newly opened road X, the server device 2 determines that the traffic in the area around the newly opened road X is not equal to or greater than the predetermined threshold value. The map data of the area 71 including the newly opened road X is not distributed. Therefore, the capacity of the map data distributed by the server device 2 can be reduced, and the loads on the server device 2 transmitting the map data and the mobile terminal device 3 receiving the map data can be suppressed.

  Further, in the first embodiment of the present invention, the server device 2 determines whether or not it is necessary to distribute the map data of the area 71 including the newly opened road X based on the traffic in the area around the newly opened road X. I do. That is, the server device 2 distributes the map data of the area including the newly opened road X, which is assumed to have high traffic volume and high usefulness on the peripheral roads, but has low traffic volume and low usefulness on the peripheral roads. The map data of the area including the newly opened road X assumed to be not distributed is not distributed. Therefore, the server device 2 can distribute the map data of the area including the newly opened road X that is highly useful for the area.

<Second embodiment>
The second embodiment of the present invention is an embodiment in which the detection unit 22 of the server device 2 detects the traffic volume of an existing road connected to the newly opened road X as the traffic volume in the area around the newly opened road X. It is.

  Note that, in the second embodiment, a configuration example of the server device 2 is the same as the configuration example of the first embodiment shown in FIG. 3, and thus detailed description is omitted. In addition, in the second embodiment, a configuration example of the mobile terminal device 3 is the same as the configuration example of the first embodiment shown in FIG. 6, and thus a detailed description is omitted.

  In the second embodiment of the present invention, the detection unit 22 detects the traffic volume of an existing road connected to the newly opened road X. The detection unit 22 detects, for example, the traffic volume of an existing road connected to the newly opened road X based on the probe information. When there are a plurality of existing roads connected to the newly opened road, the detection unit 22 detects the traffic volume of each of the plurality of existing roads.

  FIG. 9 is a diagram illustrating a configuration example of map data distributed by the server device 2. As shown in FIG. 9, for example, a newly opened road X is connected to an existing road A and an existing road B. In this case, the detection unit 22 detects the traffic on the existing road A and the existing road B connected to the newly opened road X. The detection unit 22 detects the traffic volume on the existing roads A and B based on the probe information on the existing roads A and B.

  The detection unit 22 may detect, for example, the traffic volume in the area 73 including the existing road A. Further, the detection unit 22 may detect, for example, the traffic volume in the area 74 including the existing road B.

  The determination unit 23 determines whether or not to distribute the map data of the area 71 including the newly opened road X based on the traffic volumes of the plurality of existing roads connected to the newly opened road X detected by the detection unit 22. . The deciding unit 23 decides to distribute the map data of the area 71 including the newly opened road X, for example, when any of the traffic volumes of the plurality of existing roads is equal to or more than a predetermined threshold. The determining unit 23 may determine that the map data of the area 71 including the newly opened road X is to be distributed, for example, when all of the traffic volumes of the plurality of existing roads are equal to or larger than a predetermined threshold.

  For example, when the traffic volume of either the existing road A or the existing road B is equal to or greater than a predetermined threshold, the determination unit 23 determines that the map data of the area 71 including the newly opened road X is to be distributed. In addition, the determination unit 23 may determine not to distribute the map data of the area 71 including the newly opened road X when the traffic volume of both the existing road A and the existing road B is less than the predetermined threshold.

  The determining unit 23 distributes the map data of the area 71 including the newly opened road X when the traffic volume of both the existing road A and the existing road B connected to the newly opened road X is equal to or greater than a predetermined threshold. Then, it may be determined. In this case, the determination unit 23 determines that the map data of the area 71 including the newly opened road X is not to be distributed if any of the existing road A and the existing road B is less than the predetermined threshold.

  The distribution unit 24 distributes the map data of the area 71 including the newly opened road X based on the determination result of the determination unit 23. The distribution unit 24 distributes the map data of the area 71 including the newly opened road X when the determination unit 23 determines to distribute the map data of the area 71 including the newly opened road X. When there are a plurality of areas 71 including the newly opened road X, the distribution unit 24 distributes the map data of the plurality of areas 71.

  FIG. 10 is a flowchart illustrating an operation example of the server device 2 in the second embodiment of the present invention. Note that the example in FIG. 10 is an operation example of the server device 2 when map data is distributed.

  The detection unit 22 of the server device 2 detects the traffic on an existing road connected to the newly opened road X (S301). The detection unit 22 detects the traffic volume of an existing road connected to the newly opened road X based on the probe information stored in the probe information storage unit 25, for example.

  The determination unit 23 determines whether or not to distribute the map data of the area 71 including the newly opened road X based on the traffic volume of the existing road connected to the newly opened road X detected by the detection unit 22 (S302). ). The determining unit 23 determines that the map data of the area 71 including the newly opened road X is to be distributed, for example, when the traffic volume of the existing road connected to the newly opened road X is equal to or more than a predetermined threshold. On the other hand, for example, when the traffic volume of the existing road connected to the newly opened road X is less than the predetermined threshold, the determining unit 23 determines not to distribute the map data of the area 71 including the newly opened road X.

  When the deciding unit 23 decides to distribute the map data of the area 71 including the newly opened road X (YES in S302), the distribution unit 24 adds the map data of the area 72 including the existing road to the newly opened road X. Is distributed to the mobile terminal device 3 (S303).

  On the other hand, when the deciding unit 23 decides not to distribute the map data of the area 71 including the newly opened road X (NO in S302), the distribution unit 24 distributes the map data of the area 71 including the newly opened road X. Instead, the map data of the area 72 including the existing road is distributed (S304).

  As described above, in the second embodiment of the present invention, even if there is a newly opened road X, the server device 2 determines that the traffic volume of the existing road connected to the newly opened road X is not more than the predetermined threshold value. The map data of the area 71 including the newly opened road X is not distributed. Therefore, the capacity of the map data distributed by the server device 2 can be reduced, and the loads on the server device 2 transmitting the map data and the mobile terminal device 3 receiving the map data can be suppressed.

  Further, in the second embodiment of the present invention, the server device 2 determines whether or not the map data of the area 71 including the newly opened road X needs to be distributed based on the traffic volume of the existing road connected to the newly opened road X. To determine. That is, the server device 2 distributes the map data of the area including the newly opened road X, which is assumed to have high usefulness and has high traffic volume on the existing road connected to the newly opened road X, while distributing the map data of the existing road to be connected. The map data of the area including the newly opened road X, which is assumed to have low traffic volume and low usefulness, is not distributed. Therefore, the server device 2 can distribute only the map data of the area including the newly opened road X which is highly useful for the area.

<Third embodiment>
In the third embodiment of the present invention, the server device 2 includes the determination unit 27, determines whether or not map data has already been distributed, and distributes the map data determined to be undelivered to the mobile terminal device 3. FIG.

  FIG. 11 is a diagram illustrating a configuration example of the server device 2 according to the third embodiment of the present invention. The server device 2 includes a determination unit 27. In the third embodiment of the present invention, the other configuration of the server device 2 is the same as the configuration of the first embodiment shown in FIG. Moreover, since the configuration example of the map distribution system 1 in the third embodiment of the present invention is the same as the configuration in the first embodiment shown in FIG. 1, the detailed description is omitted. Furthermore, since the configuration example of the mobile terminal device 3 according to the third embodiment of the present invention is the same as the configuration according to the first embodiment shown in FIG. 6, detailed description will be omitted.

  The determination unit 27 determines whether the map data stored in the map data storage unit 26 has already been distributed to the mobile terminal device 3. For example, before the distribution unit 24 distributes the map data of the area including the existing road and the newly opened road X, the determination unit 27 determines, for each of the map data to be distributed by the distribution unit 24, the mobile terminal device 3 It is determined whether or not it was distributed to The determination unit 27 determines, for example, whether or not the map data has been distributed for each region.

  The determination unit 27 determines whether the map data has already been distributed before the distribution unit 24 distributes the map data. The determination unit 27 determines whether or not the map data has already been distributed based on, for example, whether or not the map data has been updated from the previous distribution to the present. The determination unit 27 determines whether or not the map data has already been distributed based on whether or not the map data has been updated in the map data storage unit 26 from the previous distribution of the target map data to the present. I do. For example, when the map data of the area including the newly opened road X or the area including the existing road has not been updated from the previous distribution to the present, the determination unit 27 determines that the map data has been distributed. On the other hand, for example, if the map data of the area including the newly opened road X or the area including the existing road has been updated from the previous distribution to the present, the determination unit 27 determines that Distribution data).

  In addition, the determination unit 27 may determine whether or not the map data has already been distributed, based on a result of comparing the already distributed map data with the map data to be distributed. In this case, the map data storage unit 26 stores the map data distributed by the distribution unit 24. The determination unit 27 refers to the map data storage unit 26, compares the already distributed map data with the map data to be distributed, and determines whether or not the map data has already been distributed. For example, the determination unit 27 compares the already distributed map data with the map data to be distributed, and determines that the map data has already been distributed if the difference between the two satisfies a predetermined condition. . In addition, the determination unit 27 compares the already distributed map data with the map data to be distributed, and determines that the map data has not been distributed if the difference between the two does not satisfy a predetermined condition. .

  The predetermined condition is, for example, a predetermined ratio or the number of changed data (changed portions). For example, the determination unit 27 compares the already distributed map data with the map data to be distributed, and if the difference between the two is less than a predetermined ratio, it is determined that the map data has already been distributed. judge. The predetermined ratio may be any value, for example, “10%”. For example, the determination unit 27 compares the already distributed map data with the map data to be distributed, and if the number of change data is less than a predetermined number, the determination unit 27 distributes the map data already. It is determined that there is. In addition, the determination unit 27 compares the already distributed map data with the map data to be distributed, and if there is a slight difference between the two, determines that the map data is not distributed. Is also good. The predetermined condition may be that important contents have been changed or updated, for example, a new road has been opened or a new building has been constructed. For example, when there is a change or update in important contents such as a newly opened road X or a new building in the already distributed map data, the determination unit 27 determines that there is little change or update in the entire map data. Alternatively, it may be determined that the map data is not distributed (not distributed).

  The map data storage unit 26 may store, for example, for each mobile terminal device 3, the map data distributed by the distribution unit 24 to the mobile terminal device 3. In this case, the determination unit 27 may determine, for each mobile terminal device 3, whether the map data has already been distributed.

  The distribution unit 24 does not distribute the map data when the determination unit 27 determines that the map data has already been distributed. On the other hand, when the determining unit 27 determines that the map data has not been distributed yet (undistributed map data), the distribution unit 24 distributes the map data.

  FIG. 12 is a flowchart illustrating an operation example of the server device 2 in the third embodiment of the present invention. The example of FIG. 12 is an operation example of the server device 2 when map data is distributed.

  The detection unit 22 of the server device 2 detects the traffic on an existing road connected to the newly opened road X (S401). The detection unit 22 detects the traffic volume of an existing road connected to the newly opened road X based on the probe information stored in the probe information storage unit 25, for example.

  The determination unit 23 determines whether to distribute the map data of the area 71 including the newly opened road X based on the traffic volume of the existing road connected to the newly opened road X detected by the detection unit 22 (S402). ).

  When the deciding unit 23 decides to distribute the map data of the area 71 including the newly opened road X (YES in S402), the distribution unit 24 determines the map data of the area 72 including the existing road and the area including the newly opened road X. Among the 71 map data, the map data determined to be undelivered by the determination unit 27 is delivered to the mobile terminal device 3 (S403).

  On the other hand, when the deciding unit 23 decides not to distribute the map data of the area 71 including the newly opened road X (NO in S402), the distribution unit 24 distributes the map data of the area 71 including the newly opened road X. Instead, of the map data of the area 72 including the existing road, the map data determined to be undelivered by the determination unit 27 is delivered to the mobile terminal device 3 (S404).

  As described above, in the third embodiment of the present invention, the server device 2 includes the determination unit 27, and determines whether or not the map data has already been distributed. Deliver to. As described above, since the server device 2 does not distribute the already distributed map data, it is possible to reduce the communication amount required for distributing the map data. As a result, it is possible to reduce communication costs required for distributing map data.

  Although the present invention has been described with reference to the drawings and embodiments, it should be noted that those skilled in the art can easily make various changes and modifications based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions and the like included in each means, each step, and the like can be rearranged so as not to be logically inconsistent, and a plurality of means, steps, and the like can be combined into one or divided. . Further, the structures described in the above embodiments may be combined as appropriate.

Reference Signs List 1 map distribution system 2 server device 20 communication unit 21 control unit 22 detection unit 23 determination unit 24 distribution unit 25 probe information storage unit 26 map data storage unit 27 determination unit 3 mobile terminal device 30 communication unit 31 control unit 32 update unit 33 display Processing unit 34 Notification unit 35 Map data storage unit 36 GPS
37 Display device 4 NW
5 Mobile 6 Specific area 7 Predetermined area

Claims (11)

A distribution unit that distributes map data for each of a plurality of areas separated by rectangles;
A detection unit that detects a traffic volume in an area around the newly opened road;
A determining unit that determines whether to distribute map data of an area including the newly opened road among the plurality of areas, based on the traffic volume of the surrounding area detected by the detecting unit,
The map data distribution device, wherein the distribution unit distributes map data of an area including the newly opened road based on a determination result of the determination unit. The said determination part determines that the map data of the area | region containing the said newly opened road is delivered, when the traffic volume of the said peripheral area is more than a predetermined threshold value. Map data distribution device. The determining unit determines whether to distribute map data of an area including the newly opened road based on a traffic congestion state in the surrounding area determined from the traffic volume in the surrounding area detected by the detecting unit. The map data distribution device according to claim 1 or 2, wherein: The said determination part determines to distribute the map data of the area | region containing the said newly opened road, when the frequency | count of the occurrence of the congestion in the said peripheral area is more than a predetermined number. 4. The map data distribution device according to any one of 3. The map data distribution device according to any one of claims 1 to 4, wherein the detection unit detects a traffic volume in the surrounding area based on probe information indicating a traveling locus of the vehicle. The map data distribution device according to claim 5, wherein the detection unit detects a traffic volume in the surrounding area based on probe information including a predetermined attribute among the probe information. The map data distribution device according to any one of claims 1 to 6, wherein the detection unit detects, as the traffic volume of the surrounding area, a traffic volume of an existing road connected to the newly opened road. . The said distribution part distributes the map data of the area | region adjacent to the area | region containing the said newly opened road among the several area | regions in addition to the area | region containing the said newly opened road. The Claims 1 thru | or 7 characterized by the above-mentioned. The map data distribution device according to any one of the above. The map data determined to be distributed by the determination unit includes a determination unit that determines whether distribution has been performed,
The map data distribution device according to claim 1, wherein the distribution unit distributes the map data when the map data has not been distributed. A distribution step of distributing map data for each of a plurality of areas separated by rectangles;
A detecting step of detecting a traffic volume in an area around the newly opened road;
A determination step of determining whether to distribute map data of an area including the newly opened road among the plurality of areas, based on the traffic volume of the surrounding area detected by the detection unit,
In the distribution step, map data of an area including the newly opened road is distributed based on a result of the determination in the determination step. A distribution step of distributing map data for each of a plurality of areas separated by rectangles;
A detection step of detecting a traffic volume in an area around the newly opened road;
A determination step of determining whether to distribute map data of an area including the newly opened road among the plurality of areas based on the traffic volume of the surrounding area detected by the detection unit,
A program for causing a computer to execute, in the distributing step, distributing map data of an area including the newly opened road based on a determination result in the determining step.

Images