JP2017116441A - Guide system, guide method, and guide program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide system, a guide method, and a guide program for surely performing guide of a guide area while reducing communication traffic volume of radio communication to be wasted between a guide terminal and a distribution device.SOLUTION: A guide system 100 including a center device 2 and an on-vehicle device 1 comprises: a detection unit 171 for detecting a communication impossible section; a determination unit 172 for, when the detection unit 171 detects a communication impossible section, determining an acquisition area which is an area including at least either a communication impossible section correspondence area or a communication impossible section front area; an acquisition unit 173 for acquiring temporary distribution information corresponding to the acquisition area determined by the determination unit 172; and a guide unit 174 for performing guide on the basis of the temporary distribution information acquired by the acquisition unit 173. The acquisition unit 173 acquires the temporary distribution information corresponding to the acquisition area determined by the determination unit 172 before the on-vehicle device 1 reaches the communication impossible section.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a guidance system, a guidance method, and a guidance program.

  Conventionally, as a technology for guiding a travel route that is a route traveled by a vehicle, a map distribution server that distributes map information is provided on the center side, and wireless communication between the map distribution server and the in-vehicle terminal of the vehicle, A technique (for example, refer to Patent Document 1) that guides a travel route in an in-vehicle terminal by distributing map information corresponding to the travel route from the map distribution server to the in-vehicle terminal has been known.

JP 2005-10060 A

  However, when guiding the travel route in this system, for example, when the vehicle is located in a section where wireless communication cannot be performed such as a tunnel (hereinafter, a section where wireless communication is not possible), the travel route should be guided. Could become impossible. Therefore, the inventor of the present application sends map information corresponding to a section including a section where wireless communication is not possible (for example, all sections from the wireless communication disabled section to the destination of the traveling route) from the map distribution server to the in-vehicle terminal. We have come up with a technology that delivers in advance and guides the driving route based on the map delivered in advance.

  However, when a relatively long section is set as a section including a section where wireless communication is not possible, when the travel route of the vehicle changes after distribution of map information, the distributed map information becomes useless. There was a possibility that the amount of wireless communication between the map distribution server and the in-vehicle terminal would increase unnecessarily.

  The present invention has been made in view of the above, and it is possible to reduce the amount of wasted wireless communication between the guidance terminal and the distribution device while reliably guiding the guidance area. An object is to provide a guidance system, a guidance method, and a guidance program.

  In order to solve the above-described problems and achieve the object, a guidance system according to the present invention includes a delivery device that delivers guidance information for guiding a region on a map, and a moving guidance terminal that is the delivery device. A guidance terminal for performing guidance based on the guidance information by performing wireless communication with an apparatus, wherein the guidance terminal is located on a map positioned forward in the traveling direction with respect to the guidance terminal. The guidance system is a section on the front side in the traveling direction of the guidance terminal, and performs wireless communication between the distribution device and the guidance terminal. Corresponding to at least the communication disabled section detected by the detecting means when the detecting means detects the communication disabled section that is a section on the map that cannot be performed, and the detecting means detects the communication disabled section The communication disabled section corresponding area, which is an area on the diagram, or an area included in the guidance area when the guide terminal is located in the communication disabled section, and the communication disabled detected by the detecting means Corresponding to a determination means for determining an acquisition area that is an area including at least one of a communication impossible section forward area that is an area ahead of the section in the traveling direction of the guide terminal, and the acquisition area determined by the determination means Acquisition means for acquiring the guidance information, and guidance means for guiding the guidance area at the guidance terminal based on the guidance information acquired by the acquisition means, wherein the acquisition means includes the guidance information Before the terminal reaches the communication disabled section, the guide information corresponding to the acquisition area determined by the determination unit is acquired.

  In addition, the guidance method according to the present invention includes a distribution device that distributes guidance information for guiding an area on a map and a moving guide terminal that performs wireless communication with the distribution device to perform the guidance. A guidance method for providing guidance using a guidance system that provides guidance based on information, wherein the guidance terminal is an area on a map that is located on the front side in the traveling direction with respect to the guidance terminal. An area on the map is configured to guide the area, and the detection means is a section on the front side in the traveling direction of the guide terminal, and wireless communication between the distribution device and the guide terminal cannot be performed. A detecting step for detecting a communication disabled section, and when the determining means detects the communication disabled section in the detecting step, at least the communication disabled section detected in the detecting step A corresponding area on the map that is not communicable section, or an area that is included in the guidance area when the guidance terminal is located in the non-communication section, and that is detected in the detection step A determination step of determining an acquisition region that is an area including at least one of the communication disabled section front areas that are areas ahead of the guide terminal in the traveling direction from the communication disabled section, and the acquisition unit determines in the determination step An acquisition step of acquiring the guide information corresponding to the acquired area, and a guide step in which the guide means guides the guide area at the guide terminal based on the guide information acquired in the acquisition step; In the acquisition step, the information is determined in the determination step before the guide terminal reaches the communication impossible section. To obtain the guide information corresponding to the serial acquisition area.

  In addition, the guidance program according to the present invention includes a distribution device that distributes guidance information for guiding an area on a map, and a moving guidance terminal that performs wireless communication with the distribution device to perform the guidance. A guidance program that provides guidance using a guidance system that provides guidance based on information, wherein the guidance terminal is an area on a map that is located on the front side in the traveling direction with respect to the guidance terminal. It is configured to guide the area, and the computer is a section on the front side in the traveling direction of the guide terminal, and a section on the map where wireless communication between the distribution device and the guide terminal cannot be performed. A detecting means for detecting a communication impossible section; and, when the detecting means detects the communication disabled section, at least a region on the map corresponding to the communication disabled section detected by the detecting means. Is a communication disabled section corresponding area, or an area included in the guide area when the guide terminal is located in the communication disabled section, and is more than the communication disabled section detected by the detecting means. Determining means for determining an acquisition area that is an area including at least one of the non-communicable section forward areas that are areas ahead of the guide terminal in the traveling direction, and the guidance information corresponding to the acquisition areas determined by the determination means And a guide program for functioning as guide means for guiding the guide area at the guide terminal based on the guide information acquired by the acquisition means. The guide information corresponding to the acquisition area determined by the determination unit is acquired before the guide terminal reaches the communication disabled section.

  According to the guidance system, the guidance method, and the guidance program according to the present invention, the guidance information corresponding to the acquisition area determined by the determining means is acquired before the guidance terminal reaches the communication disabled section. Since it is possible to acquire guidance information for an appropriate area in consideration of a section, it is possible to reduce the amount of wasted wireless communication between the guidance terminal and the distribution device while reliably guiding the guidance area. .

It is a block diagram which illustrates the guidance system concerning Embodiment 1 of the present invention. It is a flowchart of a guidance process. It is a figure which illustrates the movement route which the center apparatus generated. It is a figure which illustrates the state which the own vehicle moved to the advancing direction front side in FIG. It is a block diagram which illustrates the guidance system concerning Embodiment 2 of the present invention. It is a flowchart of a guidance process. It is a figure which illustrates the movement route which the center apparatus generated. It is a figure which illustrates the movement route which the center apparatus produced | generated, and is different from the thing of FIG.

  Hereinafter, embodiments of a guidance system, a guidance method, and a guidance program according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the embodiments.

  The guidance system according to the present invention is a system for guiding a guidance area. Specifically, when a communication impossible section is detected, an acquisition area is determined, and guidance information corresponding to the determined acquisition area is acquired. A system for guiding a guidance area based on the obtained guidance information, and a system including a distribution device and a guidance terminal.

  Here, the “distribution device” is a distribution unit that distributes the guide information, specifically, a device that performs wireless communication with the guide terminal. For example, a center device provided on the center side Is mentioned. Further, the “guidance terminal” is guidance means for performing guidance, specifically, a device that performs wireless communication with the distribution device and is a moving device, such as an in-vehicle device or a terminal device. Is mentioned. Here, the “in-vehicle device” is a device mounted on a vehicle, and specifically has a concept including an in-vehicle navigation device. The “terminal device” is a device on which a predetermined computer is mounted, and specifically includes a concept including a smartphone and a portable navigation device.

  Further, “guidance information” is information used for guidance, specifically, information corresponding to a guidance area, for example, temporary distribution information. Here, “temporary distribution information” is information that is temporarily used for guidance, and specifically, information that is distributed from a distribution device to a guidance terminal. In addition, the “guidance area” is an area to be guided, and specifically, an area on the map where the guidance terminal is currently located, or the direction of travel of the guidance terminal with respect to the guidance terminal An area on the map located on the front side, for example, an area determined according to a predetermined guidance unit distance, and an area determined based on a mesh. Here, the “mesh” is a reference unit for the map specified by the map information. For example, several kilometers on the map (for example, 2.5 (km), 10 (km), or 40 (km) Etc.) Corresponding to the four-way range. The “guidance unit distance” is a distance for defining a guidance area, specifically, a distance that serves as a guidance unit, and is determined according to the scale of a map displayed on the guidance terminal, for example. Distance (for example, 2.5 (km), 10 (km), or 40 (km) corresponding to one side of the mesh), a distance that is determined for guidance on a branch point, A distance based on the position (for example, 5 (km) or the like), or a distance that is set for guidance related to traffic jams and that is based on the position of the guidance terminal (for example, 10 (km)) ) And the like.

  In addition, the “communication impossible section” is a section on the front side in the traveling direction of the guide terminal, and is a section on a map where the wireless communication between the distribution device and the guide terminal cannot be performed (for example, a tunnel). Specifically, it is a section set by a predetermined communication impossible section setting method. Here, the “predetermined communication disabled section setting method” is a method for setting a communication disabled section, for example, a method of setting based on prior communication from a telecommunications carrier, a distribution device, and a plurality of guidance Examples include a method of setting based on actual communication performance with a terminal, a method of setting by estimating from terrain or a building, and the like. Further, the “acquisition area” is an area on the map where the guide terminal should acquire the guidance information before reaching the incommunicable section, specifically, an area determined when the incommunicable section is detected. is there.

  And about the detection of a communication impossible area, the case where it is assumed that only one communication impossible area is detected and the case where it is assumed that a plurality of communication impossible areas are detected are mentioned. The case where it is assumed that a communication impossible section is detected will be described in Embodiment 1, and the case where it is assumed that a plurality of communication disabled sections will be detected will be described in Embodiment 2. As for the guidance system, a travel route that is a route to which the guidance terminal should move is generated, and a guidance area related to the generated travel route is guided, and the travel route is not generated and the travel route is not generated. Although it is assumed that the guide area is guided regardless of the case, the case where the guide area related to the generated travel route is guided will be described in the first and second embodiments, and the case where the guide area is guided regardless of the travel route. This will be described in a modified example. In the first and second embodiments, the “distribution device” is the “center device”, the “guidance terminal” is the “in-vehicle device”, the “guidance information” is the “temporary distribution information”, and the “guidance” The case where the “unit distance” is “a distance determined for performing guidance on a branch point and based on the position of the guidance terminal (for example, 5 (km)”) will be described. The “guide area” is actually a mesh including a range within the guidance unit distance from the section within the guidance unit distance on the front side of the guidance terminal in the traveling direction on the travel route of the guidance terminal (that is, In the first and second embodiments, for example, a mesh that includes a moving route and a mesh that does not include a moving route but is provided around the mesh that includes the moving route). , “Mesh” is “2.5 (km) square area on the map”, “Guide area” is a mesh including the current position of the guidance terminal (hereinafter, current position mesh), and the current position A mesh that is adjacent to the mesh and includes a section ahead of the traveling direction of the guide terminal in the travel route (hereinafter referred to as a first adjacent mesh), and the first adjacent mesh A mesh that touches and is a mesh that includes a section ahead in the traveling direction of the guide terminal further than a section included in the first adjacent mesh in the moving route (hereinafter referred to as a second adjacent mesh). explain. In the following, a vehicle equipped with an in-vehicle device (a vehicle on which a person who operates the in-vehicle device is boarded) will be referred to as “own vehicle”. The “own vehicle” is a concept including, for example, a four-wheeled vehicle, a two-wheeled vehicle, a bicycle, and the like. Hereinafter, a case where the own vehicle is a four-wheeled vehicle will be described.

(Embodiment 1)
First, the first embodiment will be described. In this embodiment, a case will be described in which it is assumed that only one communication impossible section is detected.

(Constitution)
First, the guidance system 100 according to the present embodiment will be described. FIG. 1 is a block diagram illustrating a guidance system according to an embodiment of the present invention. The guidance system 100 includes an in-vehicle device 1 and a center device 2. Note that the guidance system 100 actually includes a plurality of other in-vehicle devices having the same configuration as the in-vehicle device 1 in addition to the in-vehicle device 1, but in the following, it is included in the guidance system 100. When referring to the entire in-vehicle device, it will be collectively referred to as “the in-vehicle device of the guidance system 100”.

(Configuration-In-vehicle device)
Initially, the structure of the vehicle-mounted apparatus 1 is demonstrated. As shown in FIG. 1, the in-vehicle device 1 generally includes a communication unit 11, a touch pad 12, a display 13, a speaker 14, a current position detection unit 15, a recording unit 16, and a control unit 17.

(Configuration-In-vehicle device-Communication unit)
The communication unit 11 is a communication unit that performs wireless communication with the center apparatus 2 via a network. Although the specific kind and structure of this communication part 11 are arbitrary, a well-known mobile radio | wireless communication means can be used, for example.

(Configuration-In-vehicle device-Touchpad)
The touch pad 12 is an operation means that receives various operation inputs from the user when pressed by the user's finger or the like. The touch pad 12 is formed to be transparent or translucent, and is provided as a touch panel on the front surface of the display 13 so as to overlap the display surface of the display 13. As the touch pad 12, for example, a known touch pad provided with an operation position detecting means by a resistance film method or a capacitance method can be used.

(Configuration-In-vehicle device-Display)
The display 13 is display means for displaying various images based on the control of the control unit 17 to be described later. In particular, map information stored in a map information database 161 (to be referred to as “DB” hereinafter) described later. Display means for displaying a map based on The specific configuration of the display 13 is arbitrary. For example, a known flat panel display such as a liquid crystal display or an organic EL display can be used.

(Configuration-In-vehicle device-Speaker)
The speaker 14 is a sound output unit that outputs information by sound based on control of the control unit 17 described later. The specific form of the sound output from the speaker 14 is arbitrary, and it is possible to output a synthesized sound generated as necessary and a sound recorded in advance.

(Configuration-On-vehicle device-Current position detector)
The current position detection unit 15 is a current position detection unit that detects the current position (current position) of the in-vehicle device 1. The current position detection unit 15 includes a GPS or a geomagnetic sensor (both not shown), and detects the current position (coordinates), direction, and the like of the in-vehicle device 1 by a known method.

(Configuration-In-vehicle device-Recording unit)
The recording unit 16 is a recording unit that records a program and various data necessary for the operation of the in-vehicle device 1, and is configured using, for example, a hard disk (not shown) as an external recording device. However, including a magnetic recording medium such as a magnetic disk instead of or together with a hard disk, an optical recording medium such as a DVD or a Blu-ray disk, or an electric recording medium such as a flash, ROM, USB memory, SD card, etc. Any recording medium can be used. (The same applies to the recording unit of each device described later).

  The recording unit 16 includes a map information DB 161.

  The map information DB 161 is a map information storage unit that stores map information. Here, “map information” is information used for guidance, and is information divided in units of meshes as described above, and various positions including roads, road intersections, road structures, facilities, etc. For example, node data related to each node set on the road (for example, node ID, coordinates, etc.) and link data related to each link set on the road (for example, link ID, link) Name, connection node ID, road coordinates, road type (for example, toll road, general road, elevated road, etc.), number of lanes, feature data (for example, traffic lights, road signs, guardrails, facilities, etc.), terrain data, etc. It is configured to include.

(Configuration-In-vehicle device-Control unit)
The control unit 17 is a control unit that controls the in-vehicle device 1. Specifically, the CPU, various programs interpreted and executed on the CPU (a basic control program such as an OS, and a specific function that is activated on the OS, And an internal memory such as a RAM for storing the program and various data. In particular, the guidance program according to the embodiment is substantially installed in the in-vehicle device 1 via an arbitrary recording medium or network, thereby substantially configuring each unit of the control unit 17 (the control unit of each device described later is also included). The same shall apply).

  The control unit 17 includes a detection unit 171, a determination unit 172, an acquisition unit 173, and a guide unit 174 in terms of functional concept.

  The detection unit 171 is a detection unit that detects a communication-disabled section that is a section on the front side in the traveling direction of the in-vehicle device 1 and that is a section on a map where wireless communication between the center device 2 and the in-vehicle device 1 cannot be performed. is there. Further, when the detection unit 171 detects a communication disabled section, the determining unit 172 determines an acquisition area that is at least one of the communication disabled section corresponding area or the communication disabled section forward area. It is a decision means. Here, the “communication disabled section corresponding area” is an area on the map corresponding to the communication disabled section detected by the detection unit 171, specifically, a mesh including the communication disabled section. The “communication impossible section forward area” is an area included in the guidance area when the in-vehicle device 1 is located in the communication disabled section detected by the detection unit 171, and the communication disabled detected by the detection unit 171. It is a region on the front side in the traveling direction of the vehicle-mounted device 1 from the section, specifically, a mesh that does not include the communication-disabled section, and a section on the front side in the traveling direction of the vehicle-mounted device 1 further than the communication-disabled section. Contains mesh. The acquisition unit 173 is an acquisition unit that acquires temporary distribution information corresponding to the acquisition region determined by the determination unit 172, and the acquisition unit 172 determines the acquisition region determined by the determination unit 172 before the vehicle-mounted device 1 reaches the communication disabled section. The corresponding temporary distribution information is acquired. In addition, the guide unit 174 is a guide unit that guides the guide area in the in-vehicle device 1 based on the temporary distribution information acquired by the acquisition unit 173. The processing performed by each unit of the control unit 17 will be described later.

(Configuration-Center device)
Next, the configuration of the center device 2 will be described. As shown in FIG. 1, the center device 2 is a device that distributes information to “an in-vehicle device of the guidance system 100”, and generally includes a communication unit 21, a recording unit 26, and a control unit 27. Yes.

(Configuration-Center device-Communication unit)
The communication unit 21 is a communication unit that performs wireless communication with the “on-vehicle apparatus of the guidance system 100” via a network. The specific configuration is the same as the configuration of the communication unit 11.

(Configuration-Center device-Recording unit)
The recording unit 26 includes a map information DB 261.

  The map information DB 261 is a map information storage unit that stores map information. Here, the “map information” stored in the map information DB 261 is information used for guidance, and is the same unit as the map information in the map information DB 161 of the in-vehicle device 1 described above (that is, mesh unit). ) And information included in the map information stored in the “onboard device of the guidance system 100” (for example, node data, link data, feature data, and terrain data). The information includes corresponding information and communication identification information. Here, the “communication identification information” is information that identifies whether communication between the center device 2 and “the in-vehicle device of the guidance system 100” is possible. Specifically, each of the roads corresponding to the link data This is information for specifying whether the section is the above-described communication disabled section or the communicable section. Here, the “communicable section” is a section on the front side in the traveling direction of the guide terminal, and is a section on a map where wireless communication between the distribution device and the guide terminal can be performed. This is a section other than the impossible section. In the map information DB 261, the latest information on the map (for example, information on the abolition or establishment of roads, information on “communication specific information”, information from the telecommunications carrier or the center device 2 and “in-vehicle of the guidance system 100” The map information generated every predetermined period (for example, one day, one week, one month, etc.) based on the communication results with the “device” is sent to the communication unit 21 or an input means (not shown). Are provided and accumulated sequentially. That is, the map information DB 261 stores the map information of each past version as well as the latest version map information for each area on the map. Here, for example, “version 1” to “version 4” are provided for “version” of the map information, “version 1” is the oldest, and “version 2” is the oldest after “version 1”. Assuming that “version 3” is the second oldest after “version 2” and “version 4” is the latest, the map information “version 3” is stored in the map information DB 161 described above. In the following, it is assumed that map information of “version 1” to “version 4” is stored.

(Configuration-Center device-Control unit)
The control unit 27 is a control unit that controls the center device 2, and processing performed by the control unit 27 will be described later.

(processing)
Next, guidance processing executed by the guidance system 100 configured as described above will be described. FIG. 2 is a flowchart of the guidance process (in the following description of each process, step is abbreviated as “S”). The “guidance process” is a process for performing guidance, and specifically, a process for guiding a guidance area regarding the generated travel route. The timing for executing this guidance process is arbitrary as long as it is after the travel route is generated. For example, the travel route is generated as shown below, and is started and executed after the travel route is generated. This will be described from the start of the process.

  Specifically, an arbitrary method can be used as a method for generating the travel route, but here, for example, the center device 2 generates it in response to a request from “the in-vehicle device of the guidance system 100” in FIG. The method shall be used. Regarding the method of generating the travel route, more specifically, for the in-vehicle device 1, the device ID (specifically, the device of the in-vehicle device 1) is identification information for uniquely identifying the in-vehicle device 1 in the recording unit 16. ID “ID1”) is recorded, and the control unit 17 of the in-vehicle device 1 generates a travel route generation request including “own device ID”, “destination”, and “departure point”, The generated travel route generation request is transmitted to the center apparatus 2 via the communication unit 11. Here, the “departure point” is a point where the host vehicle starts to move, and is set, for example, by receiving a user's predetermined operation via the touch pad 12 or detected by the current position detection unit 15. The current position is set. In addition, the “destination” is a point that is the purpose of movement of the host vehicle, and is set, for example, by receiving a user's predetermined operation via the touch pad 12. On the other hand, the control unit 27 of the center device 2 receives the travel route generation request transmitted from the in-vehicle device 1 via the communication unit 21, and acquires the “departure place” and the “destination” from the received travel route generation request. Then, a travel route from the acquired “departure point” to the acquired “destination” is generated based on the latest version of the map information in the map information DB 261, and whether each section of the generated travel route is a non-communicable section Whether it is a communicable section is specified based on “communication specifying information” of the latest version of map information in the map information DB 261. Next, the control unit 27 of the center device 2 determines the generated travel route and the identification result of “whether each section of the generated travel route is a communicable section or a communicable section” (hereinafter referred to as a communicable impossibility specific result). ) And a travel route generation response including the device ID included in the received travel route generation request, and transmits the generated travel route generation response to the in-vehicle device 1 via the communication unit 21. On the other hand, the control unit 17 of the in-vehicle device 1 receives the travel route generation response transmitted by the center device 2 via the communication unit 11, acquires the device ID from the received travel route generation response, and the acquired device ID and When the device ID of the recording unit 16 is compared to determine whether or not they match, and it is determined that the acquired device ID and the device ID of the recording unit 16 match, the movement described above The travel route and the communication availability specification result included in the route generation response are acquired. In this way, when the in-vehicle device 1 receives the travel route generation response transmitted from the center device 2 and acquires the travel route and the communication disabled specification result, the guidance process is started and executed. And

  FIG. 3 is a diagram illustrating a travel route generated by the center device. As the travel route generated by the center device 2 in FIG. 1, in practice, a travel route including a route other than a straight route, such as a bent route or a curved route, may be generated. For example, as shown in FIG. 3, the center device 2 generates a straight travel route, transmits a travel route generation response including the travel route shown in FIG. A case will be described in which the transmitted travel route generation response is received, the travel route and the communication availability identification result shown in FIG. 3 are acquired, and the guidance process is started and executed. In FIG. 3, a section highlighted with a diagonal line in the movement route is a communication impossible section, a section other than the communication disabled section is a communication possible section, and the meshes M1 to M10 are the movement routes. The mesh M1 is a mesh that includes the departure place, the mesh M10 is the mesh that is located closest to the destination among the meshes M1 to M10, the meshes M1 to M3, and the mesh M7 ˜M10 is a mesh including only a communicable section, and meshes M4 to M6 are meshes including only a communicable section. The meshes M1 to M10 will be described below assuming that the mesh identification information (hereinafter referred to as mesh ID) for uniquely identifying these meshes is “MID1” to “MID10”. As described above, since the in-vehicle device 1 acquires the travel route and the communication availability specification result included in the travel route generation response, these matters in FIG. 3 (that is, the travel route itself, the travel route The position of the communicable section, the position of the communicable section, etc.) can be grasped on the in-vehicle device 1 side.

  First, as shown in FIG. 2, in SA1, the acquisition unit 173 of the in-vehicle device 1 acquires temporary distribution information. Specifically, the detection result of the current position detection unit 15 in FIG. 1 is acquired, and the current position of the host vehicle is specified in the travel route received from the center device 2 as described above based on the acquired detection result. Then, based on the identified current position of the host vehicle, the above-described “current position mesh”, the above-mentioned “first adjacent mesh”, and the above-mentioned “second adjacent mesh” are identified as the guide area, and each identified mesh Is requested to the center apparatus 2 and acquired, and the acquired temporary distribution information is recorded in the recording unit 16. More specifically, regarding the request and acquisition of temporary distribution information, the acquisition unit 173 of the in-vehicle device 1 includes a “temporary distribution information transmission request” including “own device ID” and “mesh ID of each mesh specified as a guide area”. And the generated temporary distribution information transmission request is transmitted to the center device 2 via the communication unit 11. On the other hand, the control unit 27 of the center device 2 receives the temporary distribution information transmission request transmitted by the in-vehicle device 1 via the communication unit 21, acquires the mesh ID from the received temporary distribution information transmission request, and acquires the acquired mesh. Temporary distribution information of the area on the map corresponding to the ID, and each piece of information in the latest version of map information in the map information DB 261 (for example, node data, link data, feature data, terrain data, communication specific information, etc.) Temporary distribution information including the same information as is generated with reference to the map information in the map information DB 261. Then, the control unit 27 of the center device 2 generates a temporary distribution information transmission response including the generated temporary distribution information and the device ID included in the received temporary distribution information transmission request, and transmits the generated temporary distribution information. The response is transmitted to the in-vehicle device 1 via the communication unit 21. On the other hand, the acquisition unit 173 of the in-vehicle device 1 receives the temporary distribution information transmission response transmitted by the center device 2 via the communication unit 11, acquires the device ID from the received temporary distribution information transmission response, and acquires the acquired device. When the ID and the device ID of the recording unit 16 are compared to determine whether or not they match, and it is determined that the acquired device ID and the device ID of the recording unit 16 match, The temporary distribution information included in the temporary distribution information transmission response is acquired as temporary distribution information corresponding to the guidance area.

  Here, for example, in the case shown in FIG. 3, the acquisition unit 173 of the in-vehicle device 1 acquires the detection result of the current position detection unit 15 of FIG. 1, and based on the acquired detection result, in the movement route of FIG. The current position of the host vehicle is specified, meshes M1 to M3 are specified as the guidance area, and a temporary distribution information transmission request including “device ID” = “ID1” and “mesh ID” = “MID1” to “MID3” is generated. To the center device 2. On the other hand, the control unit 27 of the center device 2 receives the temporary distribution information transmission request transmitted by the in-vehicle device 1, acquires “mesh ID” = “MID1” to “MID3” from the received temporary distribution information transmission request, Temporary distribution information of the area on the map corresponding to the acquired “mesh ID” = “MID1” to “MID3”, and each piece of information (for example, node data, link) in the map information of “version 4” in the map information DB 261 Temporary distribution information including information similar to data, feature data, terrain data, communication identification information, etc.) is generated with reference to the map information in the map information DB 261. The control unit 27 of the center apparatus 2 is included in the temporary distribution information of the area on the map corresponding to the generated “mesh ID” = “MID1” to “MID3” and the received temporary distribution information transmission request. A temporary distribution information transmission response including “device ID” = “ID1” is generated and transmitted to the in-vehicle device 1. On the other hand, the acquisition unit 173 of the in-vehicle device 1 receives the temporary distribution information transmission response transmitted by the center device 2, acquires “device ID” = “ID1” from the received temporary distribution information transmission response, and “apparatus ID”. = “ID1” and “device ID” = “ID1” of the recording unit 16 are compared to determine whether or not they match, and the acquired device ID matches the device ID of the recording unit 16 Therefore, the temporary distribution information of the area on the map corresponding to “mesh ID” = “MID1” to “MID3” included in the temporary distribution information transmission response is used as the temporary distribution information corresponding to the guidance area. The acquired temporary distribution information is recorded in the recording unit 16.

  Returning to FIG. 2, in SA <b> 2, the detection unit 171 of the in-vehicle device 1 determines whether or not a communication disabled section exists (that is, detects a communication disabled section). Specifically, referring to the movement route and communication availability specification result acquired when starting the guidance process and the map information DB 161, communication is not possible with the movement route in the mesh identified as the guidance area in the SA1 process. It is determined whether or not a section is included. If the travel route in the mesh specified as the guidance area in the SA1 process does not include a communication disabled section (that is, when a communication disabled section is not detected), it is determined that there is no communication disabled section (SA2 NO), the process proceeds to SA6. In addition, when the travel route in the mesh specified as the guidance area in the SA1 process includes a communication disabled section (that is, when a communication disabled section is detected), it is determined that a communication disabled section exists (SA2). YES), the process proceeds to SA3. Here, for example, in the case shown in FIG. 3, since the meshes M1 to M3 are specified as the guide area in SA1, it is determined that there is no communication impossible section, and the process proceeds to SA6.

  Returning to FIG. 2, in SA6, the guide unit 174 of the in-vehicle device 1 performs guidance. Specifically, a mesh as a guidance area is specified in the same manner as in SA1, and a guidance image is displayed on the display 13 or a speaker based on the temporary distribution information acquired and recorded in SA1 for the identified mesh. 14 provides guidance by outputting a guidance message by voice. Here, the “guidance image” is an image for guidance, and is, for example, a text image or an image image that guides the moving direction at the branch point ahead in the traveling direction. The “guidance message” is a message for guidance, for example, a message that guides the moving direction at the branch point ahead in the traveling direction (for example, turn right at the branch point “1 (km) ahead). Please send a message such as “Please”. Here, for example, in the case shown in FIG. 3, the meshes M1 to M3 are specified as the guidance area, and the specified meshes M1 to M3 are guided based on the temporary distribution information acquired and recorded in SA1 of FIG. .

  Next, in SA7, the control unit 17 of the in-vehicle device 1 determines whether or not the host vehicle has arrived at the destination. Specifically, it is determined whether or not the current position detected by the current position detection unit 15 in FIG. 1 is a position corresponding to the destination. And when it determines with not having arrived at the destination (NO of SA7), the process of SA1-SA7 is repeatedly performed until it determines with having arrived at the destination. If it is determined that the destination has been reached (YES at SA7), the guidance process is terminated.

  FIG. 4 is a diagram illustrating a state in which the host vehicle has moved forward in the traveling direction in FIG. 3. When SA1 to SA7 repeatedly performed after “NO of SA7” in FIG. 2 is located on the mesh M2 as indicated by a solid triangle in FIG. 4, first, SA1 in FIG. , The temporary distribution information of the area on the map corresponding to the meshes M2 to M4 in FIG. 4 is acquired, and it is determined in SA2 in FIG. 2 that there is a non-communication section (that is, the non-communication section is detected). To SA3. In SA3, the determination unit 172 of the in-vehicle device 1 determines the acquisition area. Specifically, at least an area including at least one of the “communication impossible section corresponding area” or the “communication impossible section forward area” is determined as an acquisition area. More specifically, with reference to the travel route and communication availability specification result acquired when starting the guidance process and the map information DB 161 in FIG. 1, the communication possible zone immediately before the communication unavailable zone detected in SA2 is set. It is a mesh further forward in the traveling direction than the mesh corresponding to the guidance area when the host vehicle is located, and the host vehicle is positioned in each of the non-communication sections detected in SA2. All meshes corresponding to the guidance area in the case of being present are determined as acquisition areas. Here, for example, as shown in FIG. 4, “mesh corresponding to the guidance area when the vehicle is located in the communicable section immediately before the communicable section detected in SA2” = “mesh M3 to M5” Are meshes further forward in the traveling direction in the travel route, and “all meshes corresponding to the guide area when the host vehicle is located in each of the non-communicable sections detected in SA2” = “mesh M6 ˜M8 ”is determined as the acquisition area.

  Returning to FIG. 2, in SA4, the acquisition unit 173 of the in-vehicle device 1 acquires temporary distribution information. Specifically, the temporary distribution information of the mesh determined as the acquisition area in SA3 is requested to the center apparatus 2 and acquired. As for the temporary distribution information acquisition method here, any method can be used as long as the temporary distribution information is acquired before the host vehicle reaches the communication impossible section detected in SA2, but here, For example, a method similar to that for SA1 is used. And about acquisition of temporary distribution information, specifically, before the own vehicle reaches the communication impossible section detected in SA2, the temporary distribution information of the mesh determined as the acquisition area in SA3 is acquired in the same manner as in SA1. To do. Here, for example, in the case shown in FIG. 4, the temporary distribution information of the area on the map corresponding to the meshes M6 to M8 is acquired.

  Next, in SA5, the acquisition unit 173 of the in-vehicle device 1 records temporary distribution information. Specifically, the temporary distribution information acquired in SA4 is recorded in the recording unit 16. Here, for example, in the case shown in FIG. 4, the temporary distribution information of the area on the map corresponding to the meshes M6 to M8 is recorded in the recording unit 16 in FIG. In this case, the temporary distribution information of the area on the map corresponding to the mesh M5 in FIG. 4 is not yet recorded in the recording unit 16 in FIG. 1, but the host vehicle has moved to the mesh M3 in FIG. In this case, it is recorded in the process of SA1 in FIG.

  Returning to FIG. 2, as described above, in SA6, the guide unit 174 of the in-vehicle device 1 performs guidance. Specifically, a mesh as a guidance area is specified in the same manner as in SA1, and a guidance image is displayed on the display 13 or a speaker based on the temporary distribution information acquired and recorded in SA1 for the identified mesh. 14 provides guidance by outputting a guidance message by voice. If necessary, the temporary distribution information recorded in SA5 is acquired, and based on the acquired temporary distribution information, a guide image is displayed on the display 13 or a guidance message is output from the speaker 14 by voice. To give guidance. Here, “when necessary” is a case where it is necessary to provide guidance based on the temporary distribution information recorded at SA5, and specifically, because the host vehicle is located in a non-communicable section. In addition, the temporary distribution information cannot be acquired in SA1, and more specifically, the mesh corresponding to the temporary distribution information recorded in SA5 is specified as the guidance area in SA6. Here, for example, in the case shown in FIG. 4, the meshes M2 to M4 are specified as the guidance area, and the specified meshes M2 to M4 are guided based on the temporary distribution information acquired and recorded in SA1 of FIG. .

  Thereafter, during SA1 to SA7 repeatedly performed after “NO of SA7”, when the host vehicle is positioned on the mesh M6 as indicated by the broken triangle in FIG. Since the wireless communication between the in-vehicle device 1 and the center device 2 in FIG. 1 cannot be performed, the process proceeds to SA6 without performing SA1 to SA5 in FIG. In SA6, temporary distribution information of the area on the map corresponding to the meshes M6 to M8 recorded in the recording unit 16 of FIG. 1 in SA5 performed in advance is acquired from the recording unit 16, and the acquired temporary distribution information is included in the acquired temporary distribution information. Also, guidance is provided for meshes M6 to M8 that are guidance areas. In this manner, after repeatedly performing SA1 to SA7 in FIG. 2, if it is determined that the vehicle has arrived at the destination (YES in SA7), the guidance process is terminated.

(Effect of Embodiment 1)
As described above, according to the present embodiment, the temporary distribution information corresponding to the acquisition area determined by the determination unit 172 is acquired before the host vehicle reaches the communication disabled section. Since temporary distribution information in an appropriate area can be acquired, the amount of wasted wireless communication between the in-vehicle apparatus 1 and the center apparatus 2 can be reduced while reliably guiding the guidance area.

  In addition, since the acquisition area is determined according to the predetermined guidance unit distance, for example, temporary distribution information in an appropriate range according to the guidance unit distance can be acquired in advance, and the map corresponding to the communication disabled section It is possible to properly guide the area.

(Embodiment 2)
Next, a second embodiment will be described. In the second embodiment, a case will be described in which it is assumed that a plurality of communication disabled sections are detected. The configuration of the second embodiment (including the definition of wording) is substantially the same as the configuration of the first embodiment unless otherwise specified, and the configuration that is substantially the same as the configuration of the first embodiment is the same as that of the first embodiment. The same reference numerals as used in 1 are attached as necessary, and the description thereof is omitted.

(Constitution)
First, the guidance system 100B according to the present embodiment will be described. FIG. 5 is a block diagram illustrating a guidance system according to an embodiment of the present invention. The guidance system 100B includes an in-vehicle device 1B and a center device 2. Note that the guidance system 100B actually includes a plurality of other in-vehicle devices having the same configuration as the in-vehicle device 1B in addition to the in-vehicle device 1B, but in the following, it is included in the guidance system 100B. When referring to the entire vehicle-mounted device, it will be collectively referred to as “the vehicle-mounted device of the guidance system 100B”.

(Configuration-In-vehicle device)
First, the configuration of the in-vehicle device 1B will be described. As shown in FIG. 5, the in-vehicle device 1B schematically includes a communication unit 11, a touch pad 12, a display 13, a speaker 14, a current position detection unit 15, a recording unit 16, and a control unit 17B.

(Configuration-In-vehicle device-Control unit)
The control unit 17B includes a detection unit 171B, a determination unit 172B, an acquisition unit 173B, and a guide unit 174B in terms of functional concept.

  The detection unit 171B is a section on the front side in the traveling direction of the in-vehicle device 1B, and is a non-communication section (for example, a vehicle described later) that is a section on the map where wireless communication between the center device 2 and the in-vehicle device 1B cannot be performed. It is a detection means for detecting a side communication disabled section (first communication disabled section) and a destination side communication disabled section (second communication disabled section)). In addition, when the detection unit 171B detects the vehicle-side communication disabled section and the destination-side communication disabled section, the determination unit 172B can communicate the distance between the vehicle-side communication disabled section and the destination-side communication disabled section. If the distance is less than the distance, “the vehicle side communication disabled section corresponding area (first communication disabled section corresponding area), the destination side communication disabled section corresponding area (second communication disabled section corresponding area), or the communication enabled section corresponding area It is a determining means for determining “including area” or “area including the destination side communication impossible section forward area” as the acquisition area. Here, the “vehicle-side non-communication zone” is a non-communication zone, specifically, a non-communication zone adjacent to the destination-side non-communication zone across the communicable zone, The non-communication zone (that is, the non-communication zone provided on the own vehicle side with reference to the communication zone). In addition, the “destination side non-communication zone” is a non-communication zone, specifically, a non-communication zone (that is, based on a non-communication zone) adjacent to the non-communication zone across the communication zone. Thus, it is a non-communication zone provided on the side opposite to the host vehicle (specifically, the front side in the traveling direction of the host vehicle). The “communicable distance” is a distance at which the in-vehicle device 1B that is moving (that is, the host vehicle) can reliably perform wireless communication with respect to the temporary distribution information with the center device 2. That is, the predetermined distance is equal to or greater than the distance corresponding to the time required for the in-vehicle device 1B to acquire the temporary distribution information from the center device 2. Regarding this “communication distance”, the wireless speed of the temporary distribution information is considered in consideration of the legal speed of the road that is the travel route, the communication speed and the communication amount of the wireless communication between the in-vehicle device 1B and the center device 2, and the like. Although it can be arbitrarily set within a range in which communication can be reliably performed, here, for example, “communication distance” = “1.0 (km)” is set and recorded in the recording unit 16. It will be described below. Further, the “vehicle side communication disabled section corresponding area” is an area on the map corresponding to the vehicle side communication disabled section detected by the detecting unit 171B, and specifically, a mesh including the vehicle side communication disabled section. It is. Further, the “communicable section corresponding area” is an area on the map corresponding to a communicable section between the vehicle-side communicable section and the destination-side communicable section detected by the detection unit 171B. The mesh includes only the communicable section of the communicable section and the communicable section. The “destination side communication disabled section corresponding area” is an area on the map corresponding to the destination side communication disabled section detected by the detection unit 171B, and specifically includes a destination side communication disabled section. This is a mesh. The “destination-side communication disabled section forward area” is a communication disabled section forward area, and specifically, the vehicle-side communication disabled section detected by the detection unit 171B and the destination-side communication detected by the detection unit 171B. The vehicle-mounted device 1B is a region included in the guidance area when the vehicle-mounted device 1B is located in the disabled section or the communicable section between them, and is included in the vehicle-mounted device 1B than the destination-side disabled communication section detected by the detection unit 171B. More specifically, it is a mesh that does not include a destination-side communication disabled section, and is a section further ahead of the vehicle-mounted device 1B in the traveling direction than the destination-side communication disabled section. Is a mesh containing The acquisition unit 173B is an acquisition unit that acquires temporary distribution information corresponding to the acquisition region determined by the determination unit 172B. The acquisition unit 172B determines the acquisition unit 172B before the vehicle-mounted device 1B reaches the vehicle-side communication disabled section. The temporary distribution information corresponding to the area is acquired. In addition, the guide unit 174B is a guide unit that guides the guide area in the in-vehicle device 1B based on the temporary distribution information acquired by the acquisition unit 173B. In addition, the process performed by each part of these control parts 17B is mentioned later.

(Configuration-Center device)
Next, the configuration of the center device 2 will be described. As shown in FIG. 5, the center device 2 is a device that distributes information to the “in-vehicle device of the guidance system 100 </ b> B”, and generally includes a communication unit 21, a recording unit 26, and a control unit 27. Yes.

(processing)
Next, guidance processing executed by the guidance system 100B configured as described above will be described. FIG. 6 is a flowchart of the guidance process. The “guidance process” is a process for performing guidance, and specifically, a process for guiding a guidance area regarding the generated travel route. The timing for executing this guidance processing is the same as the timing for executing the guidance processing of FIG. 2 in the actual form 1, that is, after the in-vehicle device 1B of FIG. When the travel route generation response transmitted from is received, and the travel route and the communication availability specification result are acquired, the guidance process is started and executed.

  FIG. 7 is a diagram illustrating a travel route generated by the center device. FIG. 8 is a diagram illustrating a travel route generated by the center device and different from the one shown in FIG. Here, for example, the center device 2 in FIG. 5 generates the travel route shown in FIG. 7 to start and execute the guidance process, and generates the travel route shown in FIG. A case where the process is started and executed will be described. In FIG. 7, a section highlighted with a diagonal line in the movement route is a communication impossible section, a section other than the communication disabled section is a communication possible section, and the meshes M11 to M20 are the movement routes. The mesh M11 is a mesh that includes the departure place, the mesh M20 is the mesh that is located closest to the destination among the meshes M11 to M20, and the meshes M11, M12, and M18 to M20. Is a mesh including only a communicable section, meshes M13 to M15 and M17 are meshes including only a communicable section, and mesh M16 is a mesh including a communicable section and a communicable section. It is assumed that the distance d1 between the vehicle-side non-communication zone and the destination-side non-communication zone is “0.5 (km)”. And shall. Further, in FIG. 8, the section highlighted with a diagonal line in the movement route is the communication impossible section, the section other than the communication disabled section is the communication possible section, and the meshes M21 to M30 indicate the movement route. The mesh M21 is the mesh that includes the departure place, the mesh M30 is the mesh that is located closest to the destination among the meshes M21 to M30, and the meshes M21, M22, and M28 to M30 are The mesh includes only a communicable section, the meshes M23 to M25, M27 are meshes that include only a communicable section, and the mesh M26 is a mesh that includes a communicable section and a communicable section. The distance d2 between the vehicle-side non-communication zone and the destination-side non-communication zone is “1.5 (km)”. And the. The following description will be made assuming that the mesh IDs of the meshes M11 to M20 in FIG. 7 are “MID11” to “MID20” and the mesh IDs of the meshes M21 to M30 in FIG. 8 are “MID21” to “MID30”.

  First, as illustrated in FIG. 6, in SB1, the acquisition unit 173B of the in-vehicle device 1B acquires temporary distribution information. Specifically, as in the case of SA1 in FIG. 2 in the first embodiment, the temporary distribution information is acquired, and the acquired temporary distribution information is recorded in the recording unit 16. Here, for example, in the case shown in FIG. 7, the temporary distribution information of the area on the map corresponding to “mesh ID” = “MID11” to “MID13” is acquired as the temporary distribution information corresponding to the guidance area. Further, for example, in the case shown in FIG. 8, the temporary distribution information of the area on the map corresponding to “mesh ID” = “MID21” to “MID23” is acquired as the temporary distribution information corresponding to the guidance area, and the acquired temporary The distribution information is recorded in the recording unit 16.

  Returning to FIG. 6, in SB <b> 2, the detection unit 171 </ b> B of the in-vehicle device 1 </ b> B determines whether or not a communication disabled section exists (that is, detects a communication disabled section). Specifically, the determination is performed in the same manner as in the case of SA2 in FIG. And when the communication impossible section is not included in the movement route in the mesh specified as the guidance area in the process of FIG. SB1 of FIG. 6 (that is, when the communication disabled section is not detected), there is no communication disabled section. It judges (NO of SB2), and transfers to SB8. In addition, when a communication impossible section is included in the moving route in the mesh specified as the guidance area in the process of SB1 (that is, when a communication disabled section is detected), it is determined that a communication disabled section exists (SB2 YES), the process proceeds to SB3. Here, for example, in the case shown in FIG. 7, the temporary distribution information of the area on the map corresponding to “mesh ID” = “MID11” to “MID13” is acquired in SB1 (that is, the meshes M11 to M13 are acquired in SB1). Since it is specified as the guidance area), it is determined that “communication impossible section” = “vehicle side communication impossible section” exists (that is, the vehicle side communication impossible section is detected), and the process proceeds to SB3. Further, for example, in the case shown in FIG. 8, as in the case shown in FIG. 7, the temporary distribution information of the area on the map corresponding to “mesh ID” = “M21” to “M23” is acquired in SB1 (that is, , Since the meshes M21 to M23 are specified as the guidance area in SB1), it is determined that “communication impossible section” = “vehicle side communication disabled section” exists (that is, the vehicle side communication disabled section is detected), and SB3 Migrate to

  Returning to FIG. 6, in SB <b> 3, the detection unit 171 </ b> B of the in-vehicle device 1 </ b> B determines whether or not another communication disabled section exists (that is, detects another communication disabled section). Here, the “other communication disabled section” is a communication disabled section other than the communication disabled section detected in SB2, and is separated from the communication disabled section detected in SB2 to the front side in the traveling direction across the communication enabled section. It is a communication impossible section. Specifically, with reference to the travel route and the communication availability specification result acquired when starting the guidance process, and the map information DB 161, it is determined whether or not there is another communication unavailable section. When it is determined that there is no other communication disabled section (that is, when no other communication disabled section is detected) (NO in SB3), the process proceeds to SB5. Further, when it is determined that another communication disabled section exists (that is, when another communication disabled section is detected) (YES in SB3), the process proceeds to SB4. Here, for example, in the case shown in FIG. 7, it is determined that “another communication impossible section” = “destination side communication disabled section” exists (that is, a destination side communication disabled section is detected), and SB4 is determined. Transition. Further, for example, in the case illustrated in FIG. 8, as in the case illustrated in FIG. 7, it is determined that “another communication disabled section” = “destination-side communication disabled section” exists (that is, destination-side communication disabled). Detecting the section), the process proceeds to SB4.

  Returning to FIG. 6, the determination unit 172B of the in-vehicle device 1B in SB4 determines the distance between the communication disabled section detected in SB2 and the other communication disabled section detected in SB3 (hereinafter simply referred to as “reciprocal of each communication disabled section”). It is determined whether the “distance between” is less than the communicable distance or greater than the communicable distance. Specifically, after acquiring the communicable distance from the recording unit 16 in FIG. 5, it is determined whether the “distance between each communication incapable section” is less than the acquired communicable distance or greater than the communicable distance. judge. Here, for example, in the case shown in FIG. 7, since “distance d1” = “0.5 (km)” is “communication possible distance” = “1.0 (km)”, It is determined that the “distance between each other” is less than the communicable distance. Further, for example, in the case illustrated in FIG. 8, since “distance d2” = “1.5 (km)” is “communication possible distance” = “1.0 (km)”, It is determined that the “distance between” is equal to or greater than the communicable distance.

  Returning to FIG. 6, in SB <b> 5, the determination unit 172 </ b> B of the in-vehicle device 1 </ b> B determines the acquisition area. Specifically, the acquisition area is determined based on the determination result (detection result) of SB3 and the determination result of SB4. More specifically, when no other communication disabled section is detected in SB3 (NO in SB3), and when “the distance between each communication disabled section” is determined to be equal to or greater than the communicable distance in SB4. In the same manner as in the case of SA3 in FIG. 2 in the first embodiment, the acquisition area regarding “communication unavailable section detected in SB2” is determined for SB2 detected in SB2, and “ When it is determined that the “distance between each other” is less than the communicable distance, the acquisition area is determined as follows. Specifically, regarding the determination of the acquisition area when it is determined in SB4 that “distance between each communication disabled section” is less than the communication possible distance, “vehicle side communication disabled section corresponding area, destination side communication disabled” The section corresponding area or the area including the communicable section corresponding area "or the" area including the destination side uncommitted section forward area "is defined as" communication impossible section detected at SB2 "and" other communication detected at SB3 ". It is determined as an acquisition area related to “impossible section”. More specifically, referring to the travel route and communication availability specification result acquired when starting the guidance process, and the map information DB 161 in FIG. 5, the communication available zone immediately before the communication unavailable zone detected in SB2 is displayed. It is a mesh further forward in the traveling direction than the mesh corresponding to the guidance area when the host vehicle is located, and “the communication disabled section detected in SB2”, “other communication detected in SB3” In the case where the vehicle is located in all the sections of “unavailable section” or “communicable section between“ uncommunication section detected in SB2 ”and“ other uncommitted section detected in SB3 ”” All meshes corresponding to the guidance area are determined as acquisition areas. Here, for example, in the case shown in FIG. 7, since it is determined in SB4 that “the distance between each communication impossible section” is less than the communication possible distance, “communication immediately before the communication disabled section detected in SB2 is possible. The mesh corresponding to the guidance area when the host vehicle is located in the section ”=“ mesh M12 to M14 ”is a mesh further ahead in the traveling direction in the moving route, and“ “Communication detected in SB2 is not possible. All sections of "section", "other communication disabled section detected in SB3", or "communication enabled section between" communication disabled section detected in SB2 "and" other communication disabled section detected in SB3 "" “All meshes corresponding to the guidance area when the host vehicle is located” = “mesh M15 to M19” is determined as the acquisition area. Further, for example, in the case shown in FIG. 8, since it is determined in SB4 that “the distance between each communication disabled section” is equal to or greater than the communication possible distance, “communication enabled section immediately before the communication disabled section detected in SB2” The mesh corresponding to the guide area when the host vehicle is located at “=“ mesh M22 to M24 ”is a mesh further ahead in the traveling direction on the moving route, and“ the communication disabled section detected in SB2 ”. “All meshes corresponding to the guidance area when the host vehicle is located in each of all sections” = “mesh M25 to M27” is determined as the acquisition area.

  Returning to FIG. 6, in SB6, the acquisition unit 173B of the in-vehicle device 1B acquires temporary distribution information. Specifically, in the same manner as in the case of SA4 in FIG. 2 in the first embodiment, the temporary distribution information of the mesh determined as the acquisition area in SB5 is acquired before the host vehicle reaches the communication disabled section detected in SB2. To do. Here, in the case shown in FIG. 7, the temporary distribution information of the area on the map corresponding to the meshes M15 to M19 is acquired, and in the case shown in FIG. 8, the temporary distribution information of the area on the map corresponding to the meshes M25 to M27 is acquired. get.

  Returning to FIG. 6, in SB7, the acquisition unit 173B of the in-vehicle device 1B records temporary distribution information. Specifically, the temporary distribution information acquired in SB 6 is recorded in the recording unit 16. Here, for example, in the case shown in FIG. 7, the temporary distribution information of the area on the map corresponding to the meshes M15 to M19 is recorded, and in the case shown in FIG. 8, the temporary distribution of the area on the map corresponding to the meshes M25 to M27. Record information. In the case shown in FIG. 7, the temporary distribution information of the area on the map corresponding to the mesh M14 is not yet recorded in the recording unit 16, but SB1 in FIG. 6 when the host vehicle moves to the mesh M12. Will be recorded in the process. Further, in the case shown in FIG. 8, the temporary distribution information of the area on the map corresponding to the mesh M24 is not yet recorded in the recording unit 16, but SB1 in FIG. 6 when the host vehicle moves to the mesh M22. Will be recorded in the process.

  Returning to FIG. 6, the guide unit 174 </ b> B of the in-vehicle device 1 </ b> B performs guidance. Specifically, a mesh as a guidance area is identified in the same manner as in SB1, and a guidance image is displayed on the display 13 or guidance from the speaker 14 based on the temporary distribution information acquired in SB1 for the identified mesh. Guidance is provided by outputting a message by voice. If necessary, the temporary distribution information recorded in SB7 is acquired, and based on the acquired temporary distribution information, a guide image is displayed on the display 13 or a guidance message is output from the speaker 14 by voice. To give guidance. Here, for example, in the case shown in FIGS. 7 and 8, for the mesh corresponding to the temporary distribution information recorded in SB7 of FIG. 6, guidance is performed based on the recorded temporary distribution information, and the temporary recording recorded in SB7. For meshes other than the mesh corresponding to the distribution information, guidance is performed based on the temporary distribution information acquired in SB1.

(Effect of Embodiment 2)
As described above, according to the present embodiment, when the distance between the vehicle-side non-communication zone and the destination-side non-communication zone is less than the communicable distance, the vehicle-side non-communication zone corresponding area, the destination side Since the area including the communication disabled section corresponding area, the area including the communication enabled section corresponding area, or the area including the destination side communication disabled section forward area is determined as the acquisition area, for example, not only the vehicle side communication disabled section but also the purpose Since the acquisition area can be appropriately determined in consideration of the ground-side communication disabled section, wireless communication communication that is wasted between the in-vehicle apparatus 1B and the center apparatus 2 while reliably guiding the guidance area. The amount can be reduced.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, specific configurations and means of the present invention are arbitrarily modified and improved within the scope of the technical idea of the present invention described in the claims. be able to. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and may vary depending on the implementation environment and details of the configuration of the invention. May be solved, or only some of the effects described above may be achieved. For example, even if the amount of reduction in wireless communication traffic that is wasted for guidance performed using the guidance system according to the present invention and the certainty of guidance are similar to the conventional ones, the conventional structure is different from the conventional ones. The problem of the present invention is solved when there is a reduction in the amount of wireless communication that is wasted and a certainty of guidance.

(About distribution and integration)
Further, each of the electrical components described above is functionally conceptual and does not necessarily need to be physically configured as illustrated. In other words, the specific forms of distribution and integration of each unit are not limited to those shown in the drawings, and all or a part thereof may be functionally or physically distributed or integrated in arbitrary units according to various loads or usage conditions. Can be configured. The “system” in the present application is not limited to one configured by a plurality of devices, but includes one configured by a single device. In addition, the “apparatus” in the present application is not limited to one configured by a single apparatus, but includes one configured by a plurality of apparatuses. For example, at least a part of each unit in the control unit of the in-vehicle device in each embodiment may be provided in the center device.

(About shape, numerical value, structure, time series)
Regarding the constituent elements illustrated in the embodiments and drawings, the shape, numerical value, or the structure or mutual relationship of a plurality of constituent elements are arbitrarily modified and improved within the scope of the technical idea of the present invention. be able to.

(About detection of non-communication zone)
Further, in the first embodiment, in SA2 of FIG. 2, it is determined whether or not a communication disabled section is included in the moving route in the mesh specified as the guidance area in the SA1 process, and the communication disabled section is determined. Although the case of detecting (that is, the case where the communication impossible section is detected based on the guidance area) has been described, the present invention is not limited to this. For example, the communication impossible section may be detected with reference to a reference area other than the guidance area. Here, the “reference area” is an area that serves as a reference for detecting a non-communicable section, and specifically, an area around the host vehicle. The “reference area” can be arbitrarily set as long as it is different from the guidance area. For example, according to the traveling speed of the host vehicle, the reference area is set so as to increase as the traveling speed increases. Also good. Then, in SA2 in FIG. 2, it may be determined whether or not a communication disabled section is included in the reference area, and the communication disabled section may be detected. Further, this modification may be applied to the second embodiment.

  In addition, for the “communication distance” in the second embodiment, a fixed value may be used, or an arbitrary parameter (for example, the legal speed of the road that is the travel route, between the in-vehicle device 1B and the center device 2). A fluctuation value that dynamically fluctuates based on the communication speed or communication volume of the wireless communication or the length of the destination communication disabled section may be used.

(About temporary distribution information to be acquired)
Further, in the guidance process of each embodiment described above, in the process that is repeatedly performed until the host vehicle reaches the destination, the same temporary delivery information is duplicated so as not to be obtained again. You may comprise so that it may not acquire over time.

(Deleting temporary delivery information)
Further, in the guidance processing of each of the above embodiments, temporary distribution information that is no longer used for guidance due to movement of the host vehicle may be appropriately deleted from the recording unit.

(About application)
Further, the technique described in each of the above embodiments may be applied to the case where the front side in the traveling direction of the route on which the host vehicle is traveling is guided without generating a travel route.

[Characteristics and effects of the embodiment]
Finally, some of the features and effects of the embodiments described so far are exemplified below. However, the features and effects of each embodiment are not limited to the following contents, and only some of the following effects can be achieved by including only a part of the following features. By providing the above features, there may be other effects than the following effects.

  A guidance system according to one aspect 1 of an embodiment performs wireless communication between a distribution device that distributes guidance information for guiding a region on a map and a moving guide terminal that is the distribution device. A guidance terminal that performs guidance based on the guidance information, wherein the guidance terminal guides a guidance area that is an area on a map that is located forward of the guidance terminal in the traveling direction. The guidance system is a section on the front side in the traveling direction of the guide terminal, and is a section on a map where wireless communication between the distribution device and the guide terminal cannot be performed. A detecting means for detecting a communication impossible section, and, when the detecting means detects the communication disabled section, at least a communication disabled area on the map corresponding to the communication disabled section detected by the detecting means. The inter-corresponding area or the area included in the guidance area when the guidance terminal is located in the non-communication area, and the progress of the guidance terminal from the non-communication area detected by the detection means A determination means for determining an acquisition area that is an area including at least one of the communication-impossible section forward areas, which is a front area in the direction, and an acquisition for acquiring the guidance information corresponding to the acquisition area determined by the determination means And guidance means for guiding the guidance area at the guidance terminal based on the guidance information obtained by the obtaining means, wherein the obtaining means reaches the communication disabled section. Before, the guide information corresponding to the acquisition area determined by the determination means is acquired.

  According to the guidance system according to the aspect 1, the guidance information corresponding to the acquisition area determined by the determination unit is acquired before the guidance terminal reaches the communication impossible section. Since area guidance information can be provided, it is possible to reduce the amount of wasted wireless communication between the guidance terminal and the distribution device while reliably guiding the guidance area.

  In the guidance system according to another aspect 2 of the embodiment, in the guidance system according to the aspect 1, the determination unit is configured such that the detection unit includes a first communication disabled section on the guidance terminal side, the distribution device, The second communication disabled section ahead of the guide terminal in the direction of travel of the guide terminal with respect to the first communication disabled section across the communicable section on the map where wireless communication with the guide terminal can be performed is impossible. When detected as a section, if the distance between the first communication disabled section and the second communication disabled section is less than a predetermined distance, it corresponds to the first communication disabled section detected by the detection means. It corresponds to a first communication disabled section corresponding area that is an area on a map, a second communication disabled section corresponding area that is a map area corresponding to the second communication disabled section detected by the detecting means, or a communication enabled section. An area including a communicable section corresponding area that is an area on the map to be performed, or any one of the first communication disabled section, the communicable section, and the second communication disabled section of the guide terminal The area that is included in the guidance area when located at a position where the communication terminal is forwarded in the traveling direction of the guide terminal with respect to the second communication impossible area detected by the detecting means. The acquisition unit acquires the guidance information corresponding to the acquisition region determined by the determination unit before the guide terminal reaches the first communication disabled section. .

  According to the guidance system according to the aspect 2, when the distance between the first communication disabled section and the second communication disabled section is less than a predetermined distance, the first communication disabled section corresponding area and the second communication disabled section Since the corresponding area, the area including the communicable section corresponding area, or the area including the non-communication section forward area is determined as the acquisition area, for example, not only the first communicable section but also the second communicable section is considered. Thus, since the acquisition area can be appropriately determined, it is possible to reduce the amount of wasted wireless communication between the guidance terminal and the distribution device while reliably guiding the guidance area.

  In the guidance system according to another aspect 3 of the embodiment, in the guidance system according to the aspect 1 or 2, the determination unit determines the acquisition area according to a predetermined guidance unit distance.

  According to the guidance system according to the aspect 3, since the acquisition area is determined according to a predetermined guidance unit distance, for example, guidance information in an appropriate range according to the guidance unit distance can be acquired in advance. It is possible to appropriately guide the area on the map corresponding to the communication impossible section.

  A guidance method according to another aspect 4 of the embodiment includes a distribution device that distributes guidance information for guiding a region on a map, and a mobile guidance terminal that performs wireless communication with the distribution device. And a guidance method for performing guidance based on the guidance information using a guidance system, wherein the guidance terminal is on a map located forward in the traveling direction with respect to the guidance terminal. It is configured to guide a guide area, which is an area, and the detection means is a section on the front side in the traveling direction of the guide terminal and cannot perform wireless communication between the distribution device and the guide terminal A detection step for detecting a communication disabled section that is a section on a map, and a determination unit that detects at least the communication detected in the detection step when the determination unit detects the communication disabled section in the detection step. In the communication disabled section corresponding area that is an area on the map corresponding to the disabled section, or an area included in the guidance area when the guide terminal is located in the disabled communication section, in the detection step A determination step of determining an acquisition area that is an area including at least one of the communication disabled section forward area, which is an area on the front side in the traveling direction of the guide terminal with respect to the detected communication disabled section; An acquisition step of acquiring the guide information corresponding to the acquisition area determined in the step, and a guide in which the guide means guides the guide area at the guide terminal based on the guide information acquired in the acquisition step. And in the obtaining step, the guide terminal is in the determination step before the guide terminal reaches the communication impossible section. Acquires determined the guidance information corresponding to the acquisition area.

  According to the guidance method according to the aspect 4, the guidance information corresponding to the acquisition area determined by the determining unit is acquired before the guidance terminal reaches the communication disabled section. Since it is possible to provide area guidance information, it is possible to reliably guide the guidance area even when there is a non-communication zone while reducing the amount of wasted wireless communication between the guidance terminal and the distribution device. Can be done.

  A guidance program according to another aspect 5 of the embodiment performs wireless communication between a distribution device that distributes guide information for guiding a region on a map and a moving guide terminal that is the distribution device. A guidance program that performs guidance based on the guidance information, and guides using a guidance system, the guidance terminal on a map positioned forward in the traveling direction with respect to the guidance terminal A map configured to guide a guide area, which is an area, and a computer that is a section on the front side in the traveling direction of the guide terminal and cannot perform wireless communication between the distribution device and the guide terminal A detection unit that detects a non-communication zone that is an upper zone, and corresponds to at least the non-communication zone detected by the detection unit when the detection unit detects the non-communication zone The communication disabled section corresponding area, which is an area on the diagram, or an area included in the guidance area when the guide terminal is located in the communication disabled section, and the communication disabled detected by the detecting means Corresponding to a determination means for determining an acquisition area that is an area including at least one of a communication impossible section forward area that is an area ahead of the section in the traveling direction of the guide terminal, and the acquisition area determined by the determination means A guide program that functions as an acquisition unit that acquires the guide information, and a guide unit that guides the guide area at the guide terminal based on the guide information acquired by the acquisition unit. The means acquires the guide information corresponding to the acquisition area determined by the determination means before the guide terminal reaches the communication disabled section.

  According to the guidance program according to the aspect 5, the guidance information corresponding to the acquisition area determined by the determination unit is acquired before the guidance terminal reaches the communication disabled section. Since it is possible to provide area guidance information, it is possible to reliably guide the guidance area even when there is a non-communication zone while reducing the amount of wasted wireless communication between the guidance terminal and the distribution device. Can be done.

DESCRIPTION OF SYMBOLS 1 In-vehicle apparatus 2 Center apparatus 1B In-vehicle apparatus 11 Communication part 12 Touch pad 13 Display 14 Speaker 15 Current position detection part 16 Recording part 17 Control part 17B Control part 21 Communication part 26 Recording part 27 Control part 100 Guidance system 100B Guidance system 161 Map Information DB
171 Detection unit 172 Determination unit 173 Acquisition unit 174 Guide unit 171B Detection unit 172B Determination unit 173B Acquisition unit 174B Guide unit 261 Map information DB
d1 distance d2 distance M1-M30 mesh

Claims (5)

A distribution device that distributes guidance information for guiding an area on a map, and a guidance terminal that is a moving guidance terminal that performs wireless communication with the distribution device and performs guidance based on the guidance information; A guidance system comprising:
The guide terminal is configured to guide a guide area which is an area on a map located on the front side in the traveling direction with respect to the guide terminal,
The guidance system includes:
Detecting means for detecting a communication impossible section which is a section on the front side in the traveling direction of the guide terminal and which is a section on a map where wireless communication between the distribution device and the guide terminal cannot be performed;
When the detection means detects the communication disabled section, at least the communication disabled section corresponding area, which is an area on the map corresponding to the communication disabled section detected by the detection means, or the guide terminal cannot perform the communication. An area included in the guidance area when located in a section, which is an area in front of the communication disabled section that is an area on the front side in the traveling direction of the guide terminal with respect to the communication disabled section detected by the detection means. Determining means for determining an acquisition area, which is an area including at least one of them;
Acquisition means for acquiring the guidance information corresponding to the acquisition area determined by the determination means;
Guidance means for guiding the guidance area at the guidance terminal based on the guidance information obtained by the obtaining means,
The acquisition means acquires the guidance information corresponding to the acquisition area determined by the determination means before the guidance terminal reaches the communication disabled section.
Guidance system. The determining means includes
The first communication disabled section is separated from the first communication disabled section on the guide terminal side and the communicable section that is a section on a map where wireless communication between the distribution device and the guide terminal can be performed. When the second communication disabled section on the front side in the traveling direction of the guide terminal is detected as the communication disabled section, a distance between the first communication disabled section and the second communication disabled section is a predetermined distance. If it is less than
A first communication disabled section corresponding area corresponding to the first communication disabled section detected by the detecting means, and a map area corresponding to the second disabled communication section detected by the detecting means. An area including a second communicable section corresponding area, or a communicable section corresponding area which is an area on a map corresponding to the communicable section, or
An area included in the guidance area when the guidance terminal is located in any one of the first communication disabled section, the communication enabled section, or the second communication disabled section, An area including the communication disabled section forward area, which is an area on the front side in the traveling direction of the guide terminal, with respect to the second communication disabled section detected by the detection means, is determined as the acquisition area,
The acquisition means acquires the guidance information corresponding to the acquisition area determined by the determination means before the guidance terminal reaches the first communication impossible section.
The guidance system according to claim 1. The determination means determines the acquisition area according to a predetermined guidance unit distance.
The guidance system according to claim 1 or 2. A distribution device that distributes guidance information for guiding an area on a map, and a guidance terminal that is a moving guidance terminal that performs wireless communication with the distribution device and performs guidance based on the guidance information; A guidance method using a guidance system comprising:
The guide terminal is configured to guide a guide area which is an area on a map located on the front side in the traveling direction with respect to the guide terminal,
A detecting step for detecting a communication impossible section which is a section on the front side in the traveling direction of the guide terminal and which is a section on a map where wireless communication between the distribution device and the guide terminal cannot be performed;
When the determination unit detects the communication disabled section in the detection step, at least a communication disabled section corresponding area that is an area on the map corresponding to the communication disabled section detected in the detection step, or the guide terminal Is an area included in the guidance area in the case where it is located in the non-communication section, and is an area in front of the guide terminal in the traveling direction with respect to the non-communication section detected in the detection step. A determination step of determining an acquisition area that is an area including at least one of the section front areas;
An acquisition step of acquiring the guidance information corresponding to the acquisition area determined in the determination step;
A guidance step for guiding the guidance area at the guidance terminal based on the guidance information obtained in the obtaining step; and
In the acquisition step, the guide terminal acquires the guide information corresponding to the acquisition area determined in the determination step before reaching the communication impossible section.
Guidance method. A distribution device that distributes guidance information for guiding an area on a map, and a guidance terminal that is a moving guidance terminal that performs wireless communication with the distribution device and performs guidance based on the guidance information; A guidance program for guidance using a guidance system comprising:
The guide terminal is configured to guide a guide area which is an area on a map located on the front side in the traveling direction with respect to the guide terminal,
Computer
Detecting means for detecting a communication impossible section which is a section on the front side in the traveling direction of the guide terminal and which is a section on a map where wireless communication between the distribution device and the guide terminal cannot be performed;
When the detection means detects the communication disabled section, at least the communication disabled section corresponding area, which is an area on the map corresponding to the communication disabled section detected by the detection means, or the guide terminal cannot perform the communication. An area included in the guidance area when located in a section, which is an area in front of the communication disabled section that is an area on the front side in the traveling direction of the guide terminal with respect to the communication disabled section detected by the detection means. Determining means for determining an acquisition area, which is an area including at least one of them;
Acquisition means for acquiring the guidance information corresponding to the acquisition area determined by the determination means;
A guidance program that functions as guidance means for performing guidance of the guidance area at the guidance terminal based on the guidance information acquired by the acquisition means;
The acquisition means acquires the guidance information corresponding to the acquisition area determined by the determination means before the guidance terminal reaches the communication disabled section.
Information program.

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