JP4182610B2 - Communication type navigation system and communication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation system for a moving body that is effective when, for example, a plurality of vehicles perform group traveling and the like, and a communication device mounted on or carried by the moving body.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, for example, since a plurality of vehicles travel in a group, a system has been considered in which communication is performed between the vehicles and, for example, the current position of the leading vehicle is sent to the following vehicle. For example, in Japanese Patent No. 2778240, a plurality of vehicles are each equipped with a navigation device, and travel support is provided by communicating between the navigation devices. However, in order to realize this system, each vehicle needs a navigation device.
[0003]
Therefore, for example, a technique disclosed in Japanese Patent Application Laid-Open No. 9-210700 is known as a system that does not require a navigation device on the following vehicle side. This technique will be briefly described. A navigation device as a master unit is mounted on the leading vehicle, and voice data indicating travel information of the leading vehicle is created and transmitted to the following vehicle via a wireless device. The succeeding vehicle receives the voice data transmitted from the leading vehicle via the wireless device and outputs the received voice data. In this way, a navigation device is not necessary for the following vehicle, and it is only necessary to have a configuration capable of outputting sound based on the audio data sent from the leading vehicle.
[0004]
However, in the following vehicle in this case, only voice guidance is provided, and visual information cannot be obtained. However, if, for example, the current position of the leading vehicle is to be shown on the map in order to obtain visual information, the subsequent vehicle will have a navigation function, and the intended purpose cannot be achieved.
[0005]
Therefore, the present invention enables a plurality of mobile units to appropriately perform group traveling and the like by performing communication between these devices even if some devices mounted on the mobile unit do not have a navigation function. The purpose is to do.
[0006]
[Means for Solving the Problems and Effects of the Invention]
The communication type navigation system according to claim 1, which has been made to solve the above-described problems, includes a first communication device and a second communication device, and performs navigation by communicating between both devices. The first communication device is mounted or carried on the guiding-side moving body, and the second communication device is mounted or carried on the guided-side moving body. For example, if the moving body is an object such as a vehicle, the communication device is mounted on the moving body, and if the moving body is a person, the communication device is carried.
[0007]
In the first communication device, a route to the destination for the guided mobile body can be set, and guide data necessary for the guided mobile body to travel on the set route is created. be able to. The created travel guidance data is transmitted to the second communication device.
[0008]
Here, the “route to the destination for the guided mobile body” is roughly divided into the following two (1) and (2).
(1) It is assumed that the guide-side moving body is a leading vehicle and the guided-side moving body is a subsequent vehicle. In other words, this is a case where the group travels to the same destination. Basically, the leading vehicle is traveling on the side closer to the destination of the set route, and the following vehicle follows it. Therefore, the “route to the destination for the guided mobile body” in this case is the same as the path to the destination for the leading vehicle, that is, the guided mobile body. In other words, if the leading vehicle turns right at a certain intersection, the following vehicle also turns right at the intersection. Therefore, the “guidance data necessary for the guided-side moving body to travel” in this case is the same as the guidance data necessary for the guiding-side moving body to travel. Note that “same” is not necessary because it is not necessary to be exactly the same.
[0009]
(2) Assume that the guiding-side moving body and the guided-side moving body are located at both ends of the same route and approach each other. In this case, the destination for the guided mobile body is the position of the guided mobile body, and conversely, the destination for the guided mobile body is the position of the guided mobile body. Therefore, in this case, the “route to the destination for the guided-side moving body” means that the path for the guiding-side moving body is considered in the opposite direction. In other words, if the guiding-side moving body has a route that turns right at a certain intersection, the guided-side moving body turns to the left at the intersection. Therefore, the “guidance data necessary for the guided-side moving body to travel” in this case is guidance data that is necessary when the guiding-side moving body travels backward on the route on which it should travel.
[0010]
And the 2nd communication apparatus of this system receives such driving guidance data from the 1st communication apparatus, and notifies at least in the state where a user can see visually. “Notifying in a visually recognizable state” means, for example, displaying. In the case of the above-described prior art, only voice guidance is provided and visual information cannot be obtained. However, according to the present system, the user of the second communication device can also obtain visual guidance information. Convenient. In particular, when only voice guidance is provided, the guidance content can be grasped only at the timing of guidance, but in the case of display, the guidance content can be grasped at the timing desired by the user. For example, when approaching an intersection and wanting to know which direction to turn at the intersection, the direction of the turn is known. In the case of voice guidance, if you are guided just before the intersection, you may have forgotten which direction to turn when you actually approach the intersection. Therefore, it can be said that the method of visually appealing to the user with such a display is preferable.
[0011]
  Nevertheless, the second communication device included in the guided mobile body does not need to have a navigation function. As described above, according to the system of the present invention, even if some devices mounted on the moving body do not have a navigation function, a plurality of moving bodies can perform group traveling by performing communication between the devices. Can be done properly.
  In addition, as a method of transmitting the travel guidance data from the first communication device to the second communication device, if there is no problem in the data storage capability on the second communication device side, all the routes set by the route setting means are set. The travel guide data corresponding to the route may be transmitted at a time, but if not, a method of transmitting the divided data is preferable. Therefore, the data transmission means of the system of the present invention is based on the intersection that has passed through the travel guidance data corresponding to all the routes set by the route setting means every time the position of the moving body passes the intersection. Data in a range including a predetermined intersection group is transmitted. This is based on the fact that it is considered that the position where the guided-side moving body is predicted to be within a certain range based on the position of the guiding-side moving body. Therefore, a predetermined range of data determined from such a viewpoint is transmitted.
[0012]
It is also conceivable that the guide-side moving body leaves the route already set by the route setting means. In that case, as shown in claim 2, in the first communication device, the route for the guided mobile body is reset based on the current position after the departure, and the reset route is changed to the reset route. Based on this, the travel guidance data is generated again, and the travel guide data generated again may be transmitted again to the second communication device.
[0013]
  In addition, the travel guidance data from the first communication device to the second communication deviceAs a method of dividing and transmitting,Data transmission every predetermined time as shown in claim 3May.
[0014]
  thisIn this case, data within a range in which it is assumed that the guided-side moving body is present at that time is transmitted. In this case, since the position of the guide-side moving body is not taken into consideration, it is necessary to transmit a wider range of data compared to the above-mentioned “transmission every time the moving body position passes the intersection”. is there.
  It is also conceivable that the guide-side moving body leaves the route already set by the route setting means. In that case, as shown in claim 4, in the first communication device, the route for the guided mobile body is reset based on the current position after the departure, and the reset route is changed to the reset route. Based on this, the travel guidance data is generated again, and the travel guide data generated again may be transmitted again to the second communication device.
[0015]
  By the way, as content of the travel guidance data, for example, claims5As shown in FIG. 5, it is conceivable that at least intersection guidance data is included. In that case, as intersection guidance data, claims6As shown in FIG. 4, it is conceivable that at least the distance from the predetermined starting point to the guidance target intersection, the traveling direction at the intersection, and the intersection name are included.
[0016]
  The “predetermined starting point” may be, for example, the intersection immediately before the guidance target intersection. That is, when a certain intersection is passed, the user is notified of the distance to the next intersection. Further, the intersection guidance data indicating the direction of travel at the intersection may be data for displaying, for example, “turn right” in characters, etc.7As shown in the figure, it is preferable that the traveling direction is data indicated by an arrow. This is because it is preferable to be able to grasp intuitively. Of course, both a right turn character and an arrow may be displayed.
[0017]
  Furthermore, when there is an intersection name, when the user reaches the intersection, the user can easily determine whether or not the intersection is a guidance target intersection. In general, the name of an intersection is often clearly indicated on a traffic light or the like, but there are cases where it is not specified or cannot be confirmed in various situations even if it is specified. Therefore, the claim8As shown in FIG. 5, it is conceivable to include landmarks of facilities that are landmarks in the vicinity of intersections to be guided in the intersection guidance data. In this way, for example, a landmark such as a gas station can be used as a guideline, so that the user can easily confirm that it is a guidance target intersection and in which direction it will proceed.
[0018]
  On the other hand, the timing at which the travel guidance data is displayed in the second communication device that has received the travel guidance data from the first communication device will be described. For example, although it is possible to broadcast all received data at once, for example, when data corresponding to all routes is received at once, it is not practical to broadcast them all at once. So, for example, claims9As shown in FIG. 2, the second communication device includes position detecting means that can detect the current position, and it is conceivable that the notifying means informs necessary intersection guidance data at the detected current position. In this case, it is necessary to include the intersection position in the intersection guidance data transmitted from the first communication device. In this way, it is possible to notify the guidance in a range appropriate for the guided mobile body.
[0019]
  On the other hand, if there is no such current position detection function,10The following countermeasures can be considered. That is, it is assumed that the second communication device notifies the intersection guide data within the notification range while sequentially updating the intersections that are the reference of the notification range. In this case, the “intersection serving as a reference for the notification range” is determined from, for example, an expected position obtained based on a standard moving speed. The notification range may be a range including a predetermined distance before and after the route centering on the reference intersection. The “predetermined distance” in this case is determined in consideration of the expected change in the moving speed. However, no matter how much the speed is determined in consideration of the change in the moving speed, the change in the moving speed may be unexpected depending on the situation.
[0020]
Therefore, a command input means for a user to input a command for returning the notification range to the one before update is provided, and a command for returning the notification range to the one before update is input via the command input means. In this case, the intersection guidance data in the notification range based on the input command is notified. In this way, since the user can manually switch to an appropriate range, inconveniences based on the above prediction can be solved.
[0021]
In the above description, data transmission from the first communication device to the second communication device is assumed to be possible, but the reverse is not particularly mentioned. Therefore, the first communication device further includes data reception means, and the second communication device further includes data transmission means, thereby enabling bidirectional data communication between the first communication device and the second communication device. If this happens, more appropriate processing can be performed.
[0022]
  First, claims11In the configuration shown in FIG. 2, the second communication device can detect the current position, and the guided-side moving body is detected from the route based on the detected current position and the travel guidance data transmitted from the first communication device. Judge whether it is off. If it is off the route, the current position is transmitted to the first communication device via the data transmission means. On the other hand, in the first communication device, when the current position associated with the departure from the route is transmitted from the second communication device, the route for the guided mobile body is reset based on the transmitted current position. The travel guidance data is created again based on the reset route, and the travel guidance data created again is transmitted again.
[0023]
In this way, even if the guided mobile body deviates from the route, the second communication device can obtain appropriate travel guidance data for reaching the destination from the departure position, and appropriate guidance can be obtained. Realized.
According to a thirteenth aspect of the present invention, the first communication device transmits to the second communication device data in a range including a predetermined intersection group among the travel guidance data corresponding to all the set routes. If it is assumed that this is to be done, the following measures can be taken. That is, the second communication device transmits the next travel guidance data together with the current position of the guided mobile body to the first communication device when the guided mobile body approaches the intersection to be guided. Request. Then, the first communication device transmits a predetermined range of travel guidance data determined based on the transmitted current position of the guided mobile body in response to a request from the second communication device.
[0024]
  According to a twelfth aspect of the present invention, from the first communication device, data in a range including a predetermined intersection group is transmitted to the second communication device from the travel guidance data corresponding to all the set routes. If it is assumed that this is to be done, the following measures can be taken. That is, the second communication device transmits the next travel guidance data together with the current position of the guided mobile body to the first communication device when the guided mobile body approaches the intersection to be guided. Request. Then, the first communication device transmits a predetermined range of travel guidance data determined based on the transmitted current position of the guided mobile body in response to a request from the second communication device.
[0025]
  Claim12In this way, only the minimum necessary travel guide data can be transmitted, and the data storage capability on the second communication device side may be low. Further, since the received travel guidance data is truly necessary data, there is no particular problem even if the data is mechanically notified every time it is received.
[0026]
  What has been described above is the communication type navigation system.Claims 1 and 3First communication device constituting the systemIn placeIt can also be considered as a focused invention. That is, the claim13As shown inNaCommunication device and claims14As shown inNaIt is a communication device.
[0027]
As can be easily inferred from the above description, the first communication device may be a navigation device having a communication function, for example. Of course, it is only necessary to provide the above-described functions at a minimum, and therefore, it is not always necessary to provide the functions that the current navigation apparatus has as standard. For this reason, a dedicated communication device having only the above-described functions may be newly created. However, a creation direction in which additional functions are added based on a general navigation device is realistic.
[0028]
Further, as the second communication device, for example, a mobile phone (meaning mobile phone, PHS, etc.) can be considered. Also in this case, it is only necessary to provide the above-described functions at a minimum, and therefore, it is not always necessary to provide the functions that the current portable telephones have as standard. For this reason, a dedicated communication device having only the above-mentioned functions may be newly created. However, a creation direction in which insufficient functions are added based on a general mobile phone is realistic. . Note that the method of communicating with the first communication device is not particularly limited. In other words, a telephone line may be used, or a configuration in which direct communication with the first communication apparatus is performed without using such a line may be employed. In that sense, the mobile phone need not be a mobile phone, and may be a wireless device having the above-described functions.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments to which the present invention is applied will be described below with reference to the drawings. Needless to say, the embodiments of the present invention are not limited to the following examples, and can take various forms as long as they belong to the technical scope of the present invention.
[0030]
FIG. 1 is a schematic explanatory diagram of a communication navigation system according to the present embodiment. As shown in FIG. 1, this system communicates between a navigation device 20 mounted on a car A and a mobile phone 50 mounted on a car B or carried by a user who is on the car B. Is used for navigation. The mobile phone 50 is mounted on the car B when, for example, it is placed on an in-car holder attached to a predetermined place in the car.
[0031]
In this embodiment, the car A corresponds to the “guided moving body”, and the car B corresponds to the “guided moving body”. The navigation device 20 corresponds to a “first communication device”, and the mobile phone 50 corresponds to a “second communication device”.
The above is a schematic description of the system according to the present embodiment. Next, the device configurations of the navigation device 20 and the mobile phone 50 will be described.
[0032]
As shown in FIG. 2, the navigation device 20 of this embodiment includes a position detector 21, a remote control sensor 22 for inputting a signal from a remote control terminal (hereinafter referred to as a remote control) 28, and a mobile phone connection device 23. , An external storage device 24, an audio output device 25, a display device 26, a wireless device 30, and a navigation control circuit 27 connected thereto. The navigation control circuit 27 is configured as a normal computer, and includes a known CPU, ROM, RAM, I / O, timer, a bus line for connecting these, and the like.
[0033]
The position detector 21 receives a radio wave transmitted from an artificial satellite for GPS (Global Positioning System) via a GPS antenna and is added to the vehicle and a GPS receiver 21a that detects the position, direction, speed, and the like of the vehicle. A gyroscope 21b that detects the magnitude of the rotational motion, a distance sensor 21c that includes a vehicle speed sensor, a wheel sensor, and the like to detect the travel distance of the vehicle, and a geomagnetic sensor 21d that detects an absolute direction based on geomagnetism. ing. Each of the sensors 21a to 21d has an error having a different property, and is configured to be used while complementing each other. Depending on the accuracy, the sensor may be configured by using only a part of the above-described sensors 21a to 21d, or the vehicle steering angle obtained from the difference in rotation between the left and right steering wheels may be accumulated to change the direction. A desired sensor or the like may be used.
[0034]
The mobile phone connection device 23 can be connected to a mobile phone network by connecting a mobile phone 29. The mobile phone 29 is controlled by the navigation control circuit 27 via the mobile phone connection device 23. When a mobile phone 29 capable of packet communication is connected, packet communication is enabled immediately after the power is turned on.
[0035]
The external storage device 24 stores information such as so-called map matching data for improving the accuracy of position detection, and various data including road data representing road connections.
The voice output device 25 is for outputting various guide voices and the like. The display device 26 is a color display device. A current position mark indicating a current position obtained by a known method based on information input from the position detector 21 is displayed on the screen of the display device 26 from an external storage device 24. Input map data, destination mark indicating the set destination, position information of the vehicle B obtained by communication, guide route to the destination, travel guidance useful for traveling on the set guide route, etc. The data such as the character information and the image information can be displayed in an overlapping manner. Various guide voices and the like can be output from the voice output device 25 described above.
[0036]
On the other hand, as shown in FIG. 2, the mobile phone 50 of this embodiment installed in the car B includes an operation unit 51, an audio output unit 52, a display unit 53, a GPS receiver 54, a transmission / reception unit 55, and a radio device 56. And a telephone control circuit 57 connected thereto. The telephone control circuit 57 is configured as a normal computer, and includes a known CPU, ROM, RAM, I / O, timer, a bus line for connecting these, and the like.
[0037]
Since the operation unit 51, the audio output unit 52, and the display unit 53 have a general configuration, they are not specifically described. The GPS receiver 54 has the same configuration as the GPS receiver 21a on the navigation device 20 side. The transmission / reception unit 55 performs wireless communication with a base station on the mobile phone network side via a rod antenna (not shown).
[0038]
The radio device 56 has the same configuration as that of the radio device 30 on the navigation device 20 side, and direct data communication can be performed between the two radio devices 30 and 56. That is, in the case of the present embodiment, data communication by wireless communication can be performed between the wireless devices 30 and 56, and with the navigation device 20 of the car A via the mobile phone 29 connected to the navigation device 20. Data communication is also possible between the mobile phone 50 of the car B via the mobile phone network. In the following description, the discussion will be basically made on the assumption that data communication is performed between the radio devices 30 and 56.
[0039]
The telephone control circuit 57 transmits various kinds of control processing for realizing a function as a general mobile phone, that is, a call signal for calling another telephone device from the transmission / reception unit 55 to the mobile phone network. The calling process to be performed, the ringing tone is generated from the voice output unit 52 when the calling signal is transmitted from the base station, and the contents of the incoming call are displayed on the display unit 53. When a command for connecting the telephone 50 to the mobile phone network is input, the call destination telephone device is connected to the mobile phone by connection processing and call processing for connecting the mobile phone 50 to the mobile phone network via the transmission / reception unit 55. When the mobile phone 50 is connected to the line network and can make a call with the caller side telephone device, or when the mobile phone 50 is connected to the mobile phone line network by connection processing, the caller side telephone device Call with The voice output unit 52 transmits a voice signal input from a microphone (not shown) by the user to the base station side from the transmission / reception unit 55 or a voice signal transmitted from the telephone device on the called party side. The voice input / output processing for generating the voice is executed.
[0040]
In addition to various control processes for realizing the above-described functions as a general mobile phone device, the telephone control circuit 57 includes a process for displaying data transmitted from the navigation device 20 on the display unit 53, Processing such as transmitting (uploading) the position of the own device obtained based on the data from the GPS receiver 54 to the navigation device 20 side is also performed. These processes will be described in detail later.
[0041]
In the communication navigation system of this embodiment having such a configuration, the route is set by the navigation device 20 mounted on the car A, and the travel guidance data of the car A is created based on the set route. At the same time, travel guidance data for the car B is also created, and the data is transmitted to the mobile phone 50 on the car B side. Then, on the mobile phone 50 side, the travel guidance data thus transmitted is displayed on the display unit 53, thereby realizing group travel or the like. The processing executed on the navigation device 20 side and the processing executed on the mobile phone 50 side in order to realize these functions will be described with reference to FIGS. 3, 5, 7, 9, and 11 are processes executed by the navigation control circuit 27 of the navigation device 20, and FIGS. 6, 8, 10, and 12 are processes executed by the telephone control circuit 57 on the mobile phone 50 side. It is. Hereinafter, the processing on the mobile phone 50 side corresponding to the processing on the navigation device 20 side will be described as necessary.
[0042]
FIG. 3 is a flowchart showing a setting process when communicating between the navigation device 20 and the mobile phone 50.
In S100, the menu is displayed on the display device 26 (see FIG. 2). In this menu, an item for selecting whether or not to display a setting screen related to communication is displayed.
[0043]
In subsequent S110, it is selected whether or not to display the setting screen. If an instruction to display the setting screen is input by menu selection (S110: YES), the process proceeds to S120. On the other hand, when an instruction to display the setting screen is not input from the menu (S110: NO), this process ends.
[0044]
In S 120, a travel mode selection menu is displayed on the display device 26. This travel mode selection menu includes two items, a first travel mode and a second travel mode, which can be selected by the user by operating the remote controller 28. Note that the first travel mode is a mode in which the car A is the leading car and the car B is the succeeding car and the group travels to the same destination. On the other hand, the second travel mode is a mode in which the car A and the car B are located at both ends of the same route and travel so as to approach each other. In this case, the destination for the car A is the position of the car B, and conversely, the destination for the car B is the position of the car A.
[0045]
In subsequent S 130, a transmission mode selection menu is displayed on the display device 26. This transmission mode selection menu is composed of three items: an all-route mode, an intersection mode, and a fixed time mode, and can be selected by the user by operating the remote controller 28. Note that the all route mode is a mode in which all of the set routes are transmitted to the vehicle B side at once, and the intersection mode and the fixed time mode sequentially transmit a part of the set routes to the vehicle B side. Mode. The range of data to be transmitted will be described later.
[0046]
In subsequent S140, a selection menu for the presence or absence of the GPS function on the vehicle B side is displayed on the display device 26. This selection menu for the presence / absence of GPS literally consists of two items indicating whether or not the GPS function is provided, and can be selected by the user by operating the remote controller 28. When the mobile phone 50 shown in FIG. 2 is used, since the GPS function is provided, “Yes” is selected here.
[0047]
In subsequent S150, a dialog for selecting whether or not to update the setting selected in S120 to S140 is displayed on the display device 26, and a selection result by the user from the remote control 28 is input via the remote control sensor 22. Then, based on the selection result, it is determined whether or not to update the selected setting. When updating to the selected setting (S150: YES), the process proceeds to S160 to perform update processing, and when not updating (S150: NO), this processing ends.
[0048]
On the premise that the above mode setting is made, the main processing related to data communication shown in FIG. 4 is executed.
In the first step S200 in FIG. 4, the destination is set. When setting the destination, first, the map and the current location of the car A are displayed on the display device 26. This map is a map in the vicinity of the current location calculated by a known method based on information input from the position detector 21 by the navigation control circuit 27, and the navigation control circuit 27 reads it from the external storage device 24 and displays it on the display device 26. To do. The map also displays a mark indicating the current location based on the information input from the position detector 21. From this state, the destination is set according to the user's instruction. As is well known, the destination can be set by directly specifying the position on the map or indirectly specifying the location information. For example, an address or longitude and latitude are specified.
[0049]
When the destination in S200 is set, route calculation is performed in subsequent S210. In this route calculation, an optimum route is automatically set using a technique such as Dijkstra method. In this Dijkstra method, first, an initial cost is set at the calculation start point on the link or at both end nodes of the link where the calculation start point is located. Thereafter, a process of searching for a node having the minimum cost value, adding the cost of the link connected to the node to the cost of the node, and setting the node on the link opposite side is repeated. At this time, if the cost is already set in the node on the opposite side of the link, the update is performed only when the cost is small. The cost calculation at each link in the Dijkstra method is performed using, for example, the following equation.
[0050]
Cost = link length x road width factor x road type factor
Here, the road width coefficient is a coefficient set according to the road width, and the road type coefficient is a coefficient set according to the road type such as a toll road.
In this way, when the route calculation (S210) is performed, travel guidance data for the car A is created in the subsequent S220. This is the same as the data for traveling guidance generally executed in the navigation device.
[0051]
Here, the travel guidance executed in the car A will be briefly described. The guidance route is displayed on the road map on the display device 26 to guide the driver to the appropriate route, and basically "intersection guidance" is performed. The intersection guidance is a travel guidance on how to pass through the guidance target intersection every time it approaches the guidance target intersection on the route. Note that the “guidance target intersection” refers only to an intersection that is determined to require travel guidance based on the road shape and surrounding conditions. Therefore, it does not indicate all the intersections that are routed on the destination route. For example, when traveling along a so-called “road”, an intersection that merely passes is basically not applicable.
[0052]
And intersection guidance is performed as follows, for example. Basically, the name of the intersection, the distance to the intersection, and the traveling direction (left turn, right turn, etc.) at the intersection are displayed on the display device 26. In general, the display form indicates a traveling direction with an arrow, for example. Moreover, it is more convenient for the user to display landmarks indicating facilities existing around the intersection. Further, guidance is also provided by voice via the voice output device 25. For example, 2Km → 1Km → 500m for an expressway, 700m → 300m → 100m for a general road, etc., depending on the distance to the guidance target intersection multiple times (for example, 3 times) ) Guidance may be provided. In this case, for example, the first two times will voice-guide the distance to the intersection and the direction of the turn, such as “XX meters ahead, right direction”, and the last one will say “Soon right.” The travel guidance may be as follows. By notifying the user in a timely manner in this way, the user does not need to frequently pay attention to the positional relationship between the current location and the guidance target intersection, which is very convenient.
[0053]
On the other hand, in the following S230, the travel guidance data for the car B is created, and this creation is made from the following viewpoint.
(1) In the navigation device 20, the navigation control circuit 27 has a relatively high processing capability and a large amount of information can be displayed on the display device 26. On the other hand, in the mobile phone 50, the processing capability of the telephone control circuit is relatively low, and the amount of information that can be displayed on the display unit 53 needs to be suppressed.
[0054]
Therefore, the minimum information necessary for traveling at the intersection is displayed as a matter of course, but the remaining information is displayed if there is a margin in processing capability and display capability. The “minimum necessary information” in the present embodiment includes at least a distance from a predetermined starting point to the guidance target intersection, a traveling direction at the intersection, and an intersection name.
[0055]
Here, the “predetermined starting point” may be, for example, the intersection immediately before the guidance target intersection. That is, it is intended to notify the user of the mobile phone 50 of the distance to the next intersection when passing through a certain intersection.
Further, the traveling direction at the intersection may be data for displaying, for example, “turn right” in characters, but is preferably data indicating the traveling direction with an arrow. This is because, in addition to the reason that it is preferable to be able to grasp intuitively, considering the size of the display unit 53 of the mobile phone 50, it is considered that it is preferable to display it as a graphic rather than characters. Of course, both characters and graphics may be displayed if the display size is sufficient.
[0056]
Furthermore, when there is an intersection name, when the user reaches the intersection, the user can easily determine whether or not the intersection is a guidance target intersection.
In addition, considering the importance among these three distances to the intersection, the traveling direction, and the intersection name, the traveling direction is always necessary. However, regarding the distance to the intersection and the name of the intersection, since it is possible for the user to grasp the intersection to be guided in either one, from that point, “minimum necessary information” It is also possible to think of either the distance to the intersection and the traveling direction, or one of the two sets of traveling direction and intersection name. However, in practice, it is considered that proper guidance cannot be made unless these three pieces of information are notified, and these three are set as the minimum necessary in this embodiment.
[0057]
As other information, for example, the following can be considered. In general, the name of an intersection is often clearly indicated on traffic lights, etc., but it may not be confirmed in various situations even if it is not specified or even if it is specified. It is assumed that it is not possible to take correspondence. In view of this, it is conceivable to include landmarks of facilities that serve as landmarks in the vicinity of intersections to be guided in intersection guidance data. In this way, for example, a landmark such as a gas station can be used as a guideline, so that the user can easily confirm that it is a guidance target intersection and in which direction it will proceed.
[0058]
(2) As described above, the second traveling mode is a mode in which the car A and the car B are located at both ends of the same route and travel so as to approach each other. Therefore, it is necessary to create data for travel guidance for the vehicle B traveling opposite to the route along which the vehicle A travels. Specifically, if the guidance data for the car A at a certain intersection is “right turn”, the guidance data viewed from the opposite direction, that is, “left turn” becomes the guidance data for the car B. As described above, the guidance data for the vehicle B in the second traveling mode is guidance data that is necessary when the vehicle B travels backward on the route that the vehicle B should travel by itself.
[0059]
Returning to the description of FIG. 4, in S240, it is determined whether or not there is a GPS on the side of the car B (actually whether or not the mobile phone 50 mounted on the side of the car B has a GPS function). . This is determined based on the selection result of the presence or absence of GPS in S140 of FIG.
[0060]
If there is a GPS function on the vehicle B side (S240: YES), the transmission mode is determined (S250), and depending on the type of the transmission mode, processing for all route modes (S260), processing for intersection mode (S270) ), Processing for a certain time mode (S280) is executed. If there is no GPS function on the side of the car B (S240: NO), a process without GPS is executed (S300).
[0061]
Then, each process of these S260-280 and S300 is demonstrated in order with the process by the side of the mobile telephone 50 as needed.
(A) First, the details of the all-route mode processing (S260) will be described with reference to the flowchart of FIG. 5, and the processing on the mobile phone 50 side corresponding to this all-route mode will be described with reference to the flowchart of FIG. .
[0062]
On the navigation device 20 side, first, the guidance data for the vehicle B created in S230 of FIG. 4 is transmitted to the vehicle B side (that is, the mobile phone 50) in a lump for all routes (S261 of FIG. 5).
On the other hand, the mobile phone 50 receives the guidance data for all the routes transmitted from the navigation device 20 (S1261 in FIG. 6). Then, based on the current location obtained based on the GPS data obtained from the GPS receiver 54, it is determined whether or not the vehicle has left the route (S1262). If the route has not been left (S1262: NO), travel guidance is performed based on the guidance data extracted based on the current location (S1264). Specifically, intersection guidance (as described above in detail) is performed for at least a guidance target intersection existing at a location closest to the front side from the car B. Note that “at least” is because, for example, when the distance between intersections is short, both may be guided at a time.
[0063]
If the route has been left (S1262: YES), the current location information of the vehicle B is transmitted to the vehicle A side (S1263). Note that the current location of the car B is the current location of the mobile phone 50, but is referred to as “the current location of the car B” in the following description.
Thus, it is judged in the navigation apparatus 20 whether the present location information was transmitted from the vehicle B (S262 of FIG. 5). While the current location information from the car B is not transmitted (S262: NO), travel guidance for the car A (as described above in detail) is performed (S265). On the other hand, when the current location information from the vehicle B is transmitted (S262: YES), the route is recalculated based on the transmitted current location information of the vehicle B (S263). This route is a route for the car B. Then, after creating the guidance data for the vehicle B based on the recalculated route (S264), the process returns to S261, and the guidance data for the again created vehicle B is transmitted for all routes. In S264, naturally, the guide data is created in consideration of the travel mode (first travel mode or second travel mode).
[0064]
(B) Next, the details of the intersection mode processing (S270) will be described with reference to the flowchart of FIG. 7, and the processing on the mobile phone 50 side corresponding to this intersection mode will be described with reference to the flowchart of FIG.
On the navigation device 20 side, first, the guidance data for the car B created in S230 of FIG. 4 is transmitted to the car B side (for the car B) up to a predetermined number of intersections (S271 of FIG. 7). The predetermined number may be 1 or more. However, since it may be assumed that the distance between the intersections is short, for example, it is more preferable if there is data up to a few intersections ahead.
[0065]
On the other hand, the mobile phone 50 receives the guidance data transmitted from the navigation device 20 (S1271 in FIG. 8). Then, it is determined whether or not the vehicle has left the route (S1272). If the vehicle has not left the route (S1272: NO), travel guidance is performed based on the guidance data extracted based on the current location (S1274). . In this process, as in S1264 described above, intersection guidance is performed for a guidance target intersection that is at least closest to the front side from the car B. In subsequent S1275, it is determined whether or not the car B has reached the intersection. If not (S1275: NO), the process returns to S1272, and if it has reached the intersection (S1275: YES), the next guidance data for the car A will be displayed. Is requested (S1276).
[0066]
And it is judged in the navigation apparatus 20 whether there exists a data request | requirement from the vehicle B in this way (S272 of FIG. 7). If there is a data request from the car B (S272: YES), the process returns to S271 and the next guidance data is transmitted to the car B. The “next guidance data” is data from the intersection where the car B arrives to a predetermined number of intersections ahead.
[0067]
Returning to the description of FIG. 8, when the car B leaves the route (S1272: YES), the current location information of the car B is transmitted to the car A side (S1273).
Thus, it is judged in the navigation apparatus 20 whether the present location information was transmitted from the vehicle B (S273 of FIG. 7). While the current location information from the car B is not transmitted (S273: NO), travel guidance for the car A (as described above in detail) is performed (S276). On the other hand, when the current location information from the vehicle B is transmitted (S273: YES), the route is recalculated based on the transmitted current location information of the vehicle B (S274). Then, after creating the guidance data for the car B based on the recalculated route (S275), the process returns to S271, and the guidance data for the car B that has been created again is again up to a predetermined number of intersections ahead. Send.
[0068]
(C) Next, the details of the processing for the fixed time mode (S280) will be described with reference to the flowchart of FIG. 9, and the processing on the mobile phone 50 side corresponding to the fixed time mode will be described with reference to the flowchart of FIG. To do.
On the navigation device 20 side, first, the guidance data for the vehicle B created in S230 of FIG. 4 is transmitted to the side of the vehicle B up to a predetermined range (S281 of FIG. 9). This predetermined range is a range in which the car B is assumed to exist. Specifically, a range in which the vehicle B is assumed to exist is assumed at certain intervals from the predicted maximum value and the predicted minimum value of the average speed of the vehicle B, and guidance data corresponding to the range is transmitted. It is.
[0069]
On the other hand, the mobile phone 50 receives the guidance data transmitted from the navigation device 20 (S1281 in FIG. 10). Then, it is determined whether or not the vehicle has left the route (S1282). If the vehicle has not left the route (S1282: NO), travel guidance is performed based on the guidance data extracted based on the current location (S1284). . In this process as well, as in S1264 described above, intersection guidance is performed for a guidance target intersection existing at least at a location closest to the front side from the car B. After the processing of S1284, the process returns to S1282.
[0070]
When the vehicle B leaves the route (S1282: YES), the current location information of the vehicle B is transmitted to the vehicle A side (S1283).
Thus, it is judged in the navigation apparatus 20 whether the present location information was transmitted from the vehicle B (S283 of FIG. 9). While the current location information from the vehicle B is not transmitted (S283: NO), travel guidance for the vehicle A (as described above in detail) is performed (S286). On the other hand, when the current location information from the vehicle B is transmitted (S283: YES), the route is recalculated based on the transmitted current location information of the vehicle B (S284). Then, after creating the guidance data for the car B based on the recalculated route (S285), the process returns to S281, and the again created guidance data for the car B is transmitted within the predetermined range. .
[0071]
(D) Next, details of the GPS-less process (S300) will be described with reference to the flowchart of FIG.
When the process of FIG. 11 is started, first, the transmission mode is determined (S310). If it is the all-route mode, the process of S320 and 330, if it is the intersection mode, the process of S340 to S360, if it is the fixed time mode, S370. The process of S390 is executed.
[0072]
In the case of the all route mode, the guidance data for the vehicle B created in S230 of FIG. 4 is transmitted to the vehicle B side in a lump for all routes (S320). Thereafter, travel guidance for the car A is provided (S330).
In the case of the intersection mode, the guidance data for the vehicle B created in S230 of FIG. 4 is transmitted to the vehicle B side (for the vehicle B) up to a predetermined number of intersections (S340). In subsequent S350, it is determined whether or not the car A has passed the intersection. If the vehicle A has passed the intersection (S350: YES), the process returns to S340 to transmit the next guidance data to the car B. On the other hand, if the vehicle does not pass through the intersection (S350: NO), travel guidance for the car A is performed (S360).
[0073]
In the case of the fixed time mode, the guidance data for the vehicle B created in S230 of FIG. 4 is transmitted to the vehicle B side by an amount within a predetermined range (S370). In the subsequent S380, it is determined whether or not a certain time has elapsed. If the certain time has elapsed (S380: YES), the process returns to S370 to transmit the next guidance data to the car B. On the other hand, if the vehicle has not passed the intersection (S380: NO), travel guidance for the car A is performed (S390).
[0074]
On the other hand, on the mobile phone 50 side, processing as shown in the flowchart of FIG. 12 is executed.
First, the guide data transmitted from the navigation device 20 is received (S1310). Then, guidance is performed using predetermined guidance data (S1320). If the next guidance data is transmitted from the car A (S1330: YES), the process returns to S1310 to receive the guidance data.
[0075]
Note that the “predetermined data” in S1320 differs slightly depending on how the guidance data is received. That is, as shown in S320 of FIG. 11, when the guidance data for all the routes is transmitted from the navigation device 20 in a batch, for example, a predetermined range of data is sequentially mechanically updated at regular intervals. A method of displaying can be considered. In addition, as in S340 and S370 in FIG. 11, when the navigation apparatus 20 sequentially transmits the guidance data, the transmitted guidance data may be updated and displayed each time it is transmitted. . Of course, these are just specific examples, and other display methods may be used.
[0076]
If there is no data transmission from the car A (S1330: NO), it is determined whether there is a display switching operation by the user (S1340). This switching operation is performed by the operation unit 51 (see FIGS. 2 and 3). If there is a switching operation (S1340: YES), the guidance location to be displayed is switched according to the operation (S1350).
[0077]
This is because, in the case of this method, if it is left to the completely automatic display, the possibility that the actually required guidance data is not displayed increases to some extent. For example, when the guidance data for all routes is received at once or when data is transmitted from the car A at regular intervals, the moving speed of the car B is taken into consideration, but no error correction means is provided. Therefore, if errors accumulate, there is a high possibility that actually required guidance data will not be displayed. In addition, when the guidance data is transmitted every time the car A passes the intersection, the car B at the intersection passage timing of the "car A" on the premise that the distance between the car A and the car B does not change extremely. Sending guidance data for Therefore, when the distance between the car A and the car B exceeds the allowable range, there is a high possibility that the actually required guidance data will not be displayed.
[0078]
Therefore, the user can manually switch to an appropriate range. Specifically, since the previous guidance data that has been automatically updated is currently required, it is assumed that the previous guidance data is displayed again.
In the present embodiment, as described above, the navigation device 20 corresponds to the “first communication device”, and means relating to the first communication device have the following correspondence relationship. That is, the position detector 21 corresponds to “position detection means”, the navigation control circuit 27 and the external storage device 24 correspond to “route setting means” and “travel guide data creation means”, and the radio device 30 corresponds to “data transmission”. Means "and" data receiving means ".
[0079]
On the other hand, as described above, the mobile phone 50 corresponds to the “second communication device”, and means relating to the second communication device have the following correspondence relationship. That is, the wireless device 56 corresponds to “data receiving means” and “data transmitting means”, and the display unit 53 corresponds to “notification means”. Further, the GPS receiver 54 corresponds to “position detecting means”, and the telephone control circuit 57 corresponds to “notification control means” and “route departure time handling means”. Further, the operation unit 51 corresponds to “command input means”.
[0080]
According to the communication type navigation system of the present embodiment that has the system configuration described above and executes processing, even if the mobile phone 50 that is mounted on the vehicle B that is the guided mobile body does not have a navigation function. If the navigation device 20 is mounted on the side of the vehicle A that is the guide-side moving body, the devices 20 and 50 communicate with each other to perform group traveling (corresponding to the first traveling mode) or the vehicle A and the vehicle. It is possible to perform traveling (corresponding to the second traveling mode) such that B is positioned at both ends of the same route and approaches each other.
[0081]
In this embodiment, the radio devices 30 and 56 included in both the navigation device 20 and the mobile phone 50 perform data communication. However, the mobile phone 29 connected to the navigation device 20 on the car A side and the car B side Data communication may be performed with the mobile phone 50 via a mobile phone network. Therefore, the radio device 30 is not necessarily provided.
[0082]
In this embodiment, the travel guidance is displayed on the display unit 53 in order to notify the guidance data on the mobile phone 50. Such notification by display is necessary for visual recognition, but a guidance voice may also be output from the voice output unit 52. In other words, try to appeal to both sight and hearing.
[0083]
[Another embodiment]
(1) In the above embodiment, the description has been made on the assumption that both the navigation device 20 and the mobile phone 50 can transmit and receive. However, as can be seen from the description of FIGS. 11 and 12, the car B has a GPS function. If not, there is no data request from the car B to the car A and no upload of the current position. Therefore, if only such a car B is targeted, the navigation apparatus 20 of the car A can be realized in a form having only a transmission function and the mobile phone 50 having only a reception function.
[0084]
(2) In the above embodiment, assuming that the mobile phone 50 has a GPS function, when the car B is off the route, it is uploaded to the car A side, and the travel guide data is recreated. Added resend. However, the car A may be off the route. Therefore, in that case as well, route recalculation and travel guidance data re-creation / re-transmission may be performed.
[0085]
(3) In the above embodiment, the intersection guidance is given as an example of the traveling guidance, but traveling guidance other than the intersection may be included. For example, if the road continues straight ahead for a long time, in order to notify the user whether the route is correct, it may be possible to notify the user that the route is correct or to display a landmark.
[0086]
(4) In the above embodiment, both the guide-side moving body and the guided-side moving body are assumed to be vehicles, but may be realized other than the vehicle. For example, both may be human.
(5) In the above embodiment, both the guide-side moving body and the guided-side moving body are described as one (one unit). For example, two or more guided-side moving bodies are provided for one guide-side moving body. The same navigation can be realized even if there is. That is, a system capable of individually communicating between the guiding-side moving body and the two or more guided-side moving bodies may be constructed, and data communication may be performed individually.
[0087]
(6) Although not specifically mentioned in the above embodiment, the data format for displaying on the display device 26 by the navigation device 20 and the data format for displaying on the display unit 53 of the mobile phone 50 are the same. If so, simplified data may be used as the guidance data for the car B based on the guidance data for use on the navigation device 20 side. However, if the data format at the time of display is different between the navigation device 20 side and the mobile phone 50 side, the navigation device 20 side may convert the data to a format suitable for display on the mobile phone 50 side before transmission. preferable. Of course, the conversion may be performed on the mobile phone 50 side, but it is preferable to perform necessary processing on the navigation device 20 side from the viewpoint of processing capability.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of a communication navigation system according to an embodiment.
FIG. 2 is a block diagram illustrating a configuration of the navigation device and the mobile phone according to the embodiment.
FIG. 3 is a flowchart showing processing related to settings at the time of communication executed by the navigation device.
FIG. 4 is a main flowchart showing processing related to data communication executed by the navigation device.
FIG. 5 is a flowchart showing processing for all path modes executed in the processing of FIG. 4;
FIG. 6 is a flowchart showing processing corresponding to the all-route mode executed by the mobile phone.
7 is a flowchart showing an intersection mode process executed in the process of FIG. 4; FIG.
FIG. 8 is a flowchart showing processing corresponding to an intersection mode executed by a mobile phone.
FIG. 9 is a flowchart showing processing for a fixed time mode that is executed in the processing of FIG. 4;
FIG. 10 is a flowchart showing processing corresponding to a fixed time mode executed by a mobile phone.
FIG. 11 is a flowchart showing a GPS-less process executed during the process of FIG.
FIG. 12 is a flowchart showing processing executed by the mobile phone when there is no GPS function.
[Explanation of symbols]
20 ... Navigation device
21 ... Position detector 21a ... GPS receiver
21b: Gyroscope 21c: Distance sensor
21d ... Geomagnetic sensor 22 ... Remote control sensor
23 ... Mobile phone connection device 24 ... External storage device
25 ... Audio output device 26 ... Display device
27 ... Navi control circuit 28 ... Remote control
29 ... Mobile phone 30 ... Radio
50 ... mobile phone
51 ... Operation unit 52 ... Audio output unit
53 ... Display unit 54 ... GPS receiver
55 ... Transmitter / receiver 56 ... Radio
57. Telephone control circuit

Claims (14)

Communication-type navigation that performs navigation by communicating between a first communication device mounted or carried on a guiding mobile body and a second communication device mounted or carried on a guided mobile body A system,
The first communication device is:
Position detection means for detecting the current position;
Route setting means for setting a route to the destination for the guided mobile body;
Travel guidance data creating means for creating guide data necessary for the guided mobile body to travel on the route set by the route setting means;
Data transmission means for transmitting the travel guidance data created by the travel guidance data creation means to the second communication device;
The data transmission means, every time the position of the moving body passes an intersection, out of the travel guidance data corresponding to all the routes set by the route setting means, a predetermined intersection based on the passing intersection Send data in a range that includes groups,
On the other hand, the second communication device is
Data receiving means for receiving the travel guidance data transmitted from the first communication device;
A communication type navigation system comprising: a notification means for notifying the travel guidance data received by the data receiving means at least in a state where the user can visually recognize the driving guidance data. The communication type navigation system according to claim 1,
The first communication device is:
When the guide-side moving body leaves the route already set by the route setting means, the route setting means resets the route for the guided-side moving body based on the current position after the departure, A communication type navigation characterized in that the travel guidance data creation means recreates the travel guidance data based on the reset route, and the data transmission means transmits the recreated travel guidance data again. system. Communication-type navigation that performs navigation by communicating between a first communication device mounted or carried on a guiding mobile body and a second communication device mounted or carried on a guided mobile body A system,
The first communication device is:
Position detection means for detecting the current position;
Route setting means for setting a route to the destination for the guided mobile body;
Travel guidance data creating means for creating guide data necessary for the guided mobile body to travel on the route set by the route setting means;
Data transmission means for transmitting the travel guidance data created by the travel guidance data creation means to the second communication device;
The data transmitting means, within a predetermined range of the travel guidance data corresponding to all the routes set by the route setting means, data within a range in which it is assumed that the guided mobile body exists at that time. Send
On the other hand, the second communication device is
Data receiving means for receiving the travel guidance data transmitted from the first communication device;
A communication type navigation system comprising: a notification means for notifying the travel guidance data received by the data receiving means at least in a state where the user can visually recognize the driving guidance data. The communication type navigation system according to claim 3 ,
The first communication device is:
When the guide-side moving body leaves the route already set by the route setting means, the route setting means resets the route for the guided-side moving body based on the current position after the departure, A communication type navigation characterized in that the travel guidance data creation means recreates the travel guidance data based on the reset route, and the data transmission means transmits the recreated travel guidance data again. system. The communication type navigation system according to any one of claims 1 to 4 ,
The communication type navigation system , wherein the travel guidance data includes at least intersection guidance data . The communication type navigation system according to claim 5 ,
The intersection guidance data includes at least a distance from a predetermined starting point to a guidance target intersection, a traveling direction at the intersection, and an intersection name . The communication navigation system according to claim 6, wherein
The communication type navigation system, wherein the intersection guidance data indicating the traveling direction at the intersection is data indicating the traveling direction with an arrow . The communication type navigation system according to claim 6 or 7 ,
The communication navigation system according to claim 1, wherein the intersection guidance data includes landmarks of facilities that are landmarks existing near the intersection to be guided . In the communication type navigation system according to any one of claims 5 to 8 ,
The intersection navigation data includes a landmark of a facility which is a landmark existing near an intersection to be guided. In the communication type navigation system according to any one of claims 5 to 8 ,
The second communication device is:
In order for the user to input notification control means for notifying the intersection guidance data within the notification range by the notification means while sequentially updating the intersections serving as the reference of the notification range, and a command for returning the notification range to the one before the update. Command input means, and when the command for returning the notification range to the one before update is input via the command input means, the notification control means is within the notification range based on the input command. A communication type navigation system for notifying intersection guidance data . In the communication type navigation system according to any one of claims 1 to 10 ,
The first communication device further includes data receiving means, while the second communication device includes data transmission means, and bidirectional data communication between the first communication device and the second communication device. Is made possible,
The second communication device is:
Position detection means capable of detecting the current position;
Based on the current position detected by the position detecting means and the travel guidance data transmitted from the first communication device, it is determined whether or not the guided mobile body is off the route. if, and a route departure time Remedy means for transmitting the current position via the data transmission means to the first communication device,
The first communication device is:
When the current position associated with the departure from the route is transmitted from the second communication device, the route setting means resets the route for the guided mobile body based on the transmitted current location, Communication type navigation characterized in that travel guidance data creation means recreates travel guidance data based on the reset route, and the data transmission means transmits the recreated travel guidance data again. system. The communication type navigation system according to claim 11 ,
The data transmission unit of the first communication device transmits data of a range including a predetermined intersection group to the second communication device, out of the travel guidance data corresponding to all routes set by the route setting unit. On the assumption that
The second communication device requests the first communication device to transmit the next travel guidance data together with the current position of the guided mobile body when the guided mobile body approaches the intersection to be guided. And
The data transmission means of the first communication device transmits travel guidance data in a predetermined range determined based on the transmitted current position of the guided mobile body in response to a request from the second communication device. Communication type navigation system characterized by Communication-type navigation that performs navigation by communicating between a first communication device mounted or carried on a guiding mobile body and a second communication device mounted or carried on a guided mobile body In the system, a communication device used as the first communication device,
Position detection means for detecting the current position;
Route setting means for setting a route to the destination for the guided mobile body;
Travel guidance data creating means for creating guide data necessary for the guided mobile body to travel on the route set by the route setting means;
Data transmission means for transmitting the travel guidance data created by the travel guidance data creation means to the second communication device ;
The data transmission means, every time the position of the moving body passes an intersection, out of the travel guidance data corresponding to all the routes set by the route setting means, a predetermined intersection based on the passing intersection Send data in a range that includes groups
A communication device characterized by the above. Communication-type navigation that performs navigation by communicating between a first communication device mounted or carried on a guiding mobile body and a second communication device mounted or carried on a guided mobile body In the system, a communication device used as the first communication device,
Position detection means for detecting the current position;
Route setting means for setting a route to the destination for the guided mobile body;
Travel guidance data creating means for creating guide data necessary for the guided mobile body to travel on the route set by the route setting means;
Data transmission means for transmitting the travel guidance data created by the travel guidance data creation means to the second communication device ;
The data transmitting means, within a predetermined range of the travel guidance data corresponding to all the routes set by the route setting means, data within a range in which it is assumed that the guided mobile body exists at that time. To send
A communication device characterized by the above.

Images