JP2006344062A - Information provision system and roadside device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information provision system and a roadside device, allowing a movement device to receive traffic information, map information, and position information according to transmission requirement in real time. <P>SOLUTION: In this information provision system, a plurality of roadside devices storing the traffic information, the map information, and the position information attached to each of them are provided, and the plurality of roadside devices each transmit the traffic information, the map information, and the position information to the movement device transmitting the transmission requirement according to the transmission requirement from the movement device present in a communicable range of each of the plurality of roadside devices. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an information providing system and a roadside device that provide information stored in a roadside device to a mobile device.

  Conventionally, in order to omit the storage device for storing the map information from the vehicle or to use the map information whose detailed information shown on the map is always the latest, the latest map information is stored in the server, and the Internet There is an information providing system that transmits map information from a server to a vehicle equipped with a communication device, and displays the map information received from the server by an in-vehicle display device in which a general-purpose web browser is installed. Furthermore, in order to omit the guidance route search (navigation) device from the vehicle, the guidance route search by the map information is performed in the server, and the result of the guidance route search is transmitted from the server to the vehicle equipped with the communication device via the Internet, There is an information providing system that displays a result of a guided route search received from a server by an in-vehicle display device.

FIG. 10 is a flowchart of control according to a conventional system. The position of the host vehicle is detected using a position detection device mounted on the vehicle (step S501), and position information and a transmission request regarding the position of the host vehicle are transmitted to the server (step S502). The server receives the position information and the transmission request (step S503), and transmits surrounding map information indicated by the position information received from the vehicle to the vehicle that has requested the transmission (step S504). The vehicle receives the map information from the server (step S505), and displays the map information and the position information on the in-vehicle display device (step S506) (see, for example, Patent Document 1).
JP 11-325919 A

  However, in recent years, the number of users who drive using map information, traffic information, or guided route search continues to increase, and during the day when many vehicles move, more than the allowable number of servers is installed in the vehicle. When the position information and the transmission request for detecting the position of the own vehicle using the position detection device are transmitted to the server at the same time, the server cannot process it, resulting in a decrease in the responsiveness of the server to the vehicle. Corresponding map information and traffic information cannot be received in real time.

  Similarly, when the guidance route search is performed in the server, the vehicle cannot receive the result of the guidance route search in real time.

  Further, in the conventional system, there is information in a format that cannot be displayed unless a dedicated display device is used. Moreover, not only a vehicle-mounted device but a general-purpose device such as a portable terminal with a wireless communication function capable of browsing the web in a vehicle, a PC equipped with a wireless communication environment capable of web browsing, and a monitor device equipped with a wireless communication environment capable of web browsing. When using an apparatus, there is information in a format that cannot be displayed without using dedicated display software. In this case, the server on the transmission side needs to convert the information into a format that can be displayed by the display device and transmit it. Alternatively, dedicated display software capable of displaying information needs to be installed in the display device.

  In addition, as a means of communication between the vehicle and the server, a portable communication terminal device such as a PHS (Personal Handyphone System) or a cellular phone is used to connect to the Internet. When communicating this information, the vehicle user is forced to bear a communication usage fee.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a plurality of roadside devices that store position information, map information, and traffic information attached to each of the roadside devices. In response to a transmission request from a mobile device within the communicable range of each of the plurality of roadside devices, the transmission request is made by transmitting the position information, map information, and traffic information to the mobile device that transmitted the transmission request. It is an object to provide an information providing system and a roadside device that can receive position information, map information, and traffic information according to the situation in real time.

  Another object of the present invention is to provide a plurality of roadside devices that execute a guidance search route, and the plurality of roadside devices guide in response to a request from a mobile device within the communicable range of each of the plurality of roadside devices. To provide an information providing system and a roadside device capable of receiving a result of a guided route search according to a request in real time by performing a route search and transmitting the result to a mobile device that has requested transmission. is there.

  Another object of the present invention is to convert, in a roadside device, information in a format that cannot be displayed on a display device mounted on a mobile device received from an external device into information in a format that can be displayed. An object of the present invention is to provide an information providing system and a roadside device that can use various types of information by adopting a transmission configuration.

  Another object of the present invention is to communicate between a roadside device and an external device by transmitting information from one roadside device that has received information from the external device to another roadside device. An object of the present invention is to provide an information providing system and a roadside device that can reduce the burden on an external device.

  Another object of the present invention is to provide an information providing system and a roadside device that do not require a communication usage fee by making communication between a roadside device and a mobile device one of Bluetooth, infrared communication, and wireless LAN. There is.

  An information providing system according to a first aspect of the present invention is an information providing system for providing information to a mobile device in a communicable range from each of a plurality of roadside devices, wherein the mobile device includes means for transmitting a transmission request to the roadside device. And the roadside device stores the position information, map information and traffic information attached to the roadside device, and when receiving a transmission request from the mobile device, the roadside device receives the position information, map information and traffic information. Means for transmitting to a mobile device, the mobile device further comprising means for displaying the position information, map information and traffic information received from the roadside device.

  In the information providing system according to a second aspect of the present invention, the mobile device further comprises means for transmitting destination point information about the destination point of movement to the roadside device, and the roadside device receives the destination point information from the mobile device. A search means for searching for a guide route to the destination point on the map based on the destination point information, position information, and map information; and means for transmitting the guide route information based on a search result to the mobile device; The mobile device further includes means for displaying the guidance route information received from the roadside device.

  In the information providing system according to a third aspect of the present invention, when the roadside device receives information in a format that cannot be displayed by the mobile device from an external device, the roadside device converts the information into a displayable format information from the mobile device And a means for transmitting the converted information to the mobile device when a transmission request is received.

  The information providing system according to a fourth aspect of the present invention is characterized in that one roadside device that has received information from the external device includes means for transmitting the information to another roadside device.

  The information providing system according to a fifth aspect is characterized in that the communication between the roadside device and the mobile device or the communication between the roadside devices is any one of Bluetooth, infrared communication, and wireless LAN.

  A roadside device according to a sixth aspect of the invention is a communication means having a function of communicating with the outside, a means for storing first position information, map information, and traffic information indicating the installation position of the roadside apparatus; When the second position information indicating the position is received, based on the first position information, the second position information, and the map information, a route from one position to another position on the map indicated by the map information is displayed. Search means for performing a search, and means for transmitting the route information, the first position information, the map information, and the traffic information according to the search result to the outside.

  The roadside device according to the seventh aspect of the invention receives means other than the predetermined format from the external device, converts the information into the predetermined format, and, when receiving a transmission request from the outside, sends the converted information to the outside. And a means for transmitting.

  In the first invention, when each of the plurality of roadside devices that provide information to the mobile device receives a transmission request from the mobile device in the communicable range, the position information attached to the roadside device, and The map information and traffic information stored in the roadside device are transmitted to the mobile device, and the location information, map information and traffic information transmitted from the roadside device are received by the mobile device.

  In the second invention and the sixth invention, when each of the plurality of roadside devices that provide information to the mobile device receives destination point information from the mobile device in the communicable range, the roadside device Based on the information, the position information and the map information, the guide route to the destination point on the map is searched, the guide route information based on the search result is transmitted to the mobile device, and the mobile device receives the guide route information received from the roadside device. Is displayed.

  In the third and seventh inventions, the roadside device that has received the information in a format that cannot be displayed by the mobile device from the external device converts the information into a format that can be displayed, and transmits the converted information to the mobile device To do.

  In the fourth invention, one roadside device that has received information from an external device transmits the information to another roadside device.

  In the fifth aspect of the invention, communication between the roadside device and the mobile device uses either Bluetooth, infrared communication, or wireless LAN.

  In the first invention, the number of mobile devices that can enter the communicable range can be set as the number of communication lines to which the roadside device should respond, and transmission requests are simultaneously received from more than the set number of mobile devices. Can prevent the situation where the processing cannot be completed and the responsiveness of the roadside device to the transmission request from the vehicle can be avoided. The vehicle receives the position information, map information and traffic information according to the transmission request in real time. it can

  In the second and sixth inventions, the number of mobile devices that can enter the communicable range can be set as the number of communication lines to which the roadside device should respond, and requests from the mobile devices exceeding the set number can be made. It is possible to avoid a situation in which simultaneous processing is not possible due to reception, and it is possible to avoid a decrease in responsiveness to a request from the vehicle of the roadside device, and the vehicle can receive the result of the guided route search in real time.

  In the third and seventh inventions, even if there are various types of information, it is not necessary to newly install a dedicated display device in the vehicle, and dedicated display software is installed. It is economical because a general-purpose device can be used without any problems.

  In the fourth invention, the information stored in all the roadside devices can be updated to the latest information while reducing the burden on the external device.

  In the fifth aspect of the present invention, even when large information is communicated between the roadside device and the vehicle, a communication usage fee is not required, which is economical.

Hereinafter, the present invention will be specifically described with reference to the drawings illustrating embodiments thereof.
FIG. 1 is a schematic diagram showing an entire system according to the present invention, FIG. 2 is a block diagram showing hardware mounted on a vehicle according to the present invention, and FIG. 3 is a schematic diagram showing road-to-vehicle communication according to the present invention. is there.

  In FIG. 1, reference numeral 1 denotes a vehicle. The vehicle 1 includes a communication device 11, a remote control device 12 for operating the communication device 11, a communication antenna 13 for communicating with the roadside device 2a via a wireless LAN, and a monitor for outputting image information. A device 14 and an audio device 15 for outputting voice information are provided.

  The communication device 11 includes an input unit 11a, a communication unit 11b, an image information control unit 11c, an audio information control unit 11d, and a control unit 11e.

  The remote control device 12 includes a switch and a multidirectional switch. The user of the vehicle 1 inputs information according to the position information, map information, traffic information, and the like output to the monitor device 14 by operating the switch and the multidirectional switch. Information input by operating the switch and the multidirectional switch is transmitted to the input unit 11a from an infrared communication unit (not shown) provided in the remote control device 12.

  The input unit 11a receives information input via the remote operation device 12 by infrared communication, and sends the received information to the control unit 11e.

  The communication unit 11b is a communication interface for performing short-range wireless communication using a wireless LAN. The communication unit 11b transmits the information given from the control unit 11e to the roadside device 2a via the antenna 13. Moreover, the information transmitted from the roadside apparatus 2a is received via the antenna 13, and is sent to the control part 11e.

  The image information control unit 11c performs output control on image information, and performs control to output information to the monitor device 14 based on information given from the input unit 11a via the control unit 11e. Moreover, based on the information given from the communication part 11b via the control part 11e, control which outputs information to the monitor apparatus 14 is performed. The monitor device 14 outputs the map information given from the control unit 11e, outputs the position indicated by the position information given from the control unit 11e using the pointer on the map information, and traffic on the map information. Output information.

  The voice information control unit 11d performs output control regarding voice information, and receives information given from the input unit 11a via the control unit 11e and information given from the communication unit 11b via the control unit 11e. Control to output to the audio device 15 is performed.

  The control unit 11 e performs general control of the communication device 11. Specifically, control is performed to send information provided from the input unit 11a or the communication unit 11b to the image information control unit 11c or the audio information control unit 11d. In addition, information input according to the position information, map information, traffic information, etc. output from the remote control device 12 to the monitor device 14 can be used as a transmission request for map information or guided route search results, destination point information, or other information. It converts to various information and performs control to send to the communication unit 11b.

  In FIG. 1, reference numerals 2a, 2b, 2c,... Are roadside devices that are installed along the road between the vehicle 1 and the roadside device and between the roadside devices at a distance that can be communicated by wireless LAN. . As shown in FIG. 3, when the vehicle 1 is at a distance allowing communication with the roadside device 2 a by wireless LAN, the roadside device 2 a receives a transmission request from the vehicle 1 and starts road-to-vehicle communication. Then, as a result of the movement of the vehicle 1, when the vehicle 1 moves away from the distance that can be communicated with the roadside device 2 a by the wireless LAN, the road-to-vehicle communication between the vehicle 1 and the roadside device 2 a is terminated. Further, when the vehicle 1 moves and is at a distance that allows communication with the roadside device 2b by wireless LAN, the roadside device 2b receives a transmission request from the vehicle 1, and the road between the vehicle 1 and the roadside device 2b. Start inter-vehicle communication. As the vehicle 1 moves in this way, the roadside devices that communicate via the wireless LAN are also sequentially switched to the roadside devices 2a, 2b, 2c,.

  As shown in FIG. 1, the roadside device 2a includes an information communication device 21 having a server function, and a short-range communication antenna 22 for communicating with the vehicle 1 and other roadside devices 2b by a wireless LAN.

  The information communication device 21 includes a short-range communication unit 21a, a communication unit 21b, a communication control unit 21c, a storage unit 21d, a CPU 21e, and a memory 21f, and has a function as a server.

  The short-range communication unit 21a is a communication interface for performing short-range wireless communication using a wireless LAN. The short-range communication unit 21a receives the information transmitted from the vehicle 1, the transmission request, or the transmission request transmitted from another roadside device 2b via the short-range communication antenna 22, and sends it to the communication control unit 21c. Moreover, the information given from the communication control part 21c is transmitted to the vehicle 1 or the other roadside apparatus 2b via the near field communication antenna 22.

  The communication unit 21b is a communication interface for connecting to the Internet via a telephone line network using a modem device or a line connection device (not shown) connected by wire. .. Periodically connect to information distribution apparatuses 3a, b..., Which are a large number of web servers or FTP servers connected on the Internet, and receive information from the information distribution apparatuses 3a, 3b. It is sent to the communication control unit 21c.

  The communication control unit 21c receives a transmission request or information from the short-range communication unit 21a or the communication unit 21b and performs control to send to the CPU 21e. Moreover, control which sends the information read from the memory | storage part 21d to the near field communication part 21a or the communication part 21b is performed. In addition, control is performed to send the route search result given from the CPU 21e to the short-range communication unit 21a.

  The memory | storage part 21d memorize | stores the information regarding the format which can be displayed in the monitor apparatus used for map information, traffic information, the roadside apparatus 2a, and the monitor apparatus used for vehicles, or a general purpose apparatus. The map information and the traffic information are periodically updated by receiving the latest information from the information distribution devices 3a, 3b. Further, the position information attached to the roadside device 2a is information relating to the latitude and longitude indicating the position where the roadside device 2a is installed, and using this information, indicates the latitude and longitude where the vehicle received from the roadside device 2a is located. .

  The CPU 21 e performs general control of the information communication device 21. Specifically, the CPU 21e performs control to read information from the storage unit 21d to the memory 21f and send it to the communication control unit 21c in response to a transmission request given from the communication control unit 21c. Further, the CPU 21e performs a guidance route search based on the destination point information given from the communication control unit 21c, and performs control to send the result of the route search to the communication control unit 21c. Further, the CPU 21e performs control to convert information other than the predetermined format received from the information distribution apparatuses 3a, 3b,... Into information of a predetermined format and store the converted information in the storage unit 21d.

  4 and 5 are flowcharts showing communication control between the roadside apparatus and the vehicle according to the present invention. The control unit 11e of the communication device 11 mounted on the vehicle 1 determines whether or not a transmission request is input by operating the switch and the multidirectional switch of the remote control device 12 (step S101). As a result, if it is determined that a transmission request has not been input (NO in step S101), the process returns to an input waiting state. On the other hand, if the control unit 11e determines that a transmission request has been input (YES in step S101), the control unit 11e transmits the input transmission request from the communication unit 11b to the roadside device 2a (step S102), and a timer (not shown). To start timing (step S103). CPU21e of the information communication apparatus 21 mounted in the roadside apparatus 2a waits until reception is received, when the transmission request is not received via the short-distance communication part 21a (NO in step S104). On the other hand, when the CPU 21e receives a transmission request transmitted from the vehicle 1 via the short-range communication unit 21a (YES in step S104), the CPU 21e receives position information, map information, and map information from the storage unit 21d according to the transmission request. The traffic information is read (step S105), and the read position information, map information, and traffic information are transmitted from the short-range communication unit 21a to the vehicle 1 (step S106).

  When the control unit 11e has not received the position information, the map information, and the traffic information transmitted from the roadside device 2a via the communication unit 11b within a certain time measured by a timer (not shown) (step S11). In S107, the transmission request is transmitted again from the communication unit 11b to the roadside device 2a (step S102). On the other hand, when the control unit 11e receives the position information, map information, and traffic information transmitted from the roadside device 2a within a predetermined time via the communication unit 11b (YES in step S107), the control unit 11e receives the position information, map information, and traffic information from the roadside device 2a. It is determined whether position information, map information, and traffic information are already temporarily stored in a cache (not shown) (step S108). As a result, when it is determined that the position information, map information, and traffic information received from the roadside device 2a are not temporarily stored in the cache (NO in step S108), the position information, map information, and traffic information are temporarily stored in the cache (step S109). The map information is output, the position indicated by the position information is output on the map information using a pointer, and the traffic information is output on the map information (step S113). On the other hand, when it is determined that the position information, the map information, and the traffic information received from the roadside device 2a are temporarily stored in the cache (YES in step S108), the control unit 11e further uses the position information as a key to perform the roadside device. It is determined whether the information received from 2a overlaps with the information temporarily stored in the cache (step S110). As a result, if it is determined that they overlap (YES in step S110), the position information, map information, and traffic information received from the roadside device 2a are discarded (step S111), and the map information is output to the monitor device 14. The position indicated by the position information is output on the map information using a pointer, and the traffic information is output on the map information (step S113). On the other hand, if the control unit 11e determines that there is no overlap (NO in step S110), the position information, map information, and map information received from the roadside apparatus 2a, the position information, map information, and traffic information temporarily stored in the cache. And the traffic information is updated (step S112). The map information is output to the monitor device 14, the position indicated by the position information is output on the map information using a pointer, and the traffic information is output on the map information (step S113). Furthermore, the control unit 11e determines whether information related to the end of the transmission request has been input (step S114). As a result, if it is determined that information related to the end of the transmission request has been input (YES in step S114), the communication is terminated (step S115). On the other hand, if the control unit 11e determines that information related to the end of the transmission request has not been input (NO in step S114), the control unit 11e transmits the transmission request from the communication unit 11b to the roadside device 2a again (step S102). At this time, as a result of the movement of the vehicle 1, when the vehicle 1 moves away from the distance that can be communicated with the roadside device 2 a, the road-to-vehicle communication between the vehicle 1 and the roadside device 2 a is terminated, and communication with the roadside device 2 b is possible. When the distance is short, the same communication control is performed with the roadside device 2b.

  Next, the guidance route search executed by the roadside device will be described. 6 and 7 are flowcharts showing the guidance route search control executed by the roadside device according to the present invention. The control unit 11e of the communication device 11 mounted on the vehicle 1 determines whether or not a transmission request and destination point information have been input by operating the switch and the multidirectional switch of the remote control device 12 (step S201). . As a result, when it is determined that the transmission request and the destination point information are not input (NO in step S201), the process returns to the input waiting state. On the other hand, when it is determined that the transmission request and the destination point information are input (YES in step S201), the control unit 11e temporarily stores the input destination point information in a cache (not shown) (step S202). The input transmission request and destination point information temporarily stored in the cache are transmitted from the communication unit 11b to the roadside apparatus 2a (step S203), and a timer (not shown) is activated to start timekeeping (step S204). When the CPU 21e of the information communication device 21 mounted on the roadside device 2a has not received the transmission request and the destination point information (NO in step S205), the CPU 21e stands by until it is received. On the other hand, when the CPU 21e receives the transmission request and destination point information transmitted from the vehicle 1 via the short-range communication unit 21a (YES in step S205), the CPU 21e receives the position information, map information, and traffic information from the storage unit 21d. (Step S206), and based on the read position information and map information, a guide route search on the map is executed with the position information as the start point and the destination point information as the end point (step S207). The position information, map information, and traffic information And the result of a guidance route search is transmitted to the vehicle 1 from the near field communication part 21a (step S208).

  The control unit 11e receives, via the communication unit 11b, the position information, the map information, the traffic information, and the guidance route search result transmitted from the roadside device 2a within a certain time counted by a timer (not shown). If not (NO in step S209), the transmission request and the target time point information temporarily stored in the cache are transmitted again from the communication unit 11b to the roadside apparatus 2a (step S203). On the other hand, when the control unit 11e receives the position information, the map information, the traffic information, and the guidance route search result transmitted from the roadside device 2a within a certain time via the communication unit 11b (YES in Step S209), It is determined whether or not the position information, map information, traffic information, and guidance route search results received from the roadside device 2a have already been temporarily stored in the cache (step S210). As a result, when it is determined that the position information, map information, traffic information, and guidance route search results received from the roadside device 2a are not temporarily stored in the cache (NO in step S210), the position information, map information, traffic information, and guidance route search are temporarily stored in the cache (step S211). ), The map information is output to the monitor device 14, the position indicated by the position information is set as the start point, the position indicated by the destination point information is output as the end point using the pointer on the map information, and the result of the guidance route search is displayed. The map information is output on the road using line display, and the traffic information is output on the map information (step S215). On the other hand, if the control unit 11e determines that the position information, map information, traffic information, and guidance route search results received from the roadside device 2a are temporarily stored in the cache (YES in step S210), the position information Whether or not the information received from the roadside device 2a and the result of the guided route search are overlapped with the information temporarily stored in the cache and the result of the guided route search using the result of the guided route search as a key. (Step S212). As a result, if it is determined that they overlap (YES in step S212), the position information, map information, traffic information, and guidance route search results received from the roadside device 2a are discarded (step S213), and the monitor device 14 The map information is output, the position indicated by the position information is set as the starting point, the position indicated by the destination point information is output as the end point, and the pointer is output on the map information. It outputs using a line display, and outputs traffic information on map information (step S215). On the other hand, when determining that there is no duplication (NO in step S212), the control unit 11e receives position information, map information, traffic information, and guidance route search results temporarily stored in the cache from the roadside device 2a. The position information, the map information, the traffic information, and the guidance route search result are updated (step S214), the map information is output to the monitor device 14, the position indicated by the position information is set as the start point, and the position indicated by the destination point information is determined. As the end point, the pointer is output on the map information, the result of the guidance route search is output on the road of the map information using a line display, and the traffic information is output on the map information (step S215). Further, it is determined whether information related to the end of the transmission request has been input (step S216). As a result, if it is determined that information related to the end of the transmission request has been input (YES in step S216), the destination point information temporarily stored in the cache (not shown) is deleted in step 202 (step S217), and communication is performed. The process ends (step S218). On the other hand, if the control unit 11e determines that information related to the end of the transmission request is not input (NO in step S216), the control unit 11e again transmits the transmission request and the target time point information temporarily stored in the cache from the communication unit 11b. It transmits to the apparatus 2a (step S203). At this time, as a result of the movement of the vehicle 1, when the vehicle 1 moves away from the communicable distance with the roadside device 2 a, the road-to-vehicle communication between the vehicle 1 and the roadside device 2 a is terminated, and communication with the roadside device 2 b is possible. When the distance is short, the same communication control is performed with the roadside device 2b.

  FIG. 8 is a flowchart showing information format conversion control executed by the roadside apparatus according to the present invention. The CPU 21e of the information communication device 21 mounted on the roadside device 2a periodically connects to the information distribution devices 3a, 3b... Via the telephone line network by the communication unit 21b and transmits a transmission request (step S301). Information transmitted from the distribution devices 3a, 3b,... Is received via the communication unit 21b (step S302). The CPU 21e reads out information related to a format that can be displayed on the monitor device 14 mounted on the vehicle 1 stored in advance from the storage unit 21d (step S303), and based on the information related to the read format, the information distribution device 3a, It is determined whether or not the information received from 3b is in a format that can be displayed on the monitor device 14 mounted on the vehicle 1 (step S304). As a result, when it is determined that the format can be displayed on the monitor device 14 mounted on the vehicle 1 (YES in step S304), the received information is stored in the storage unit 21d (step S306). On the other hand, if it is determined that the format is other than the format that can be displayed on the monitor device 14 mounted on the vehicle 1 (NO in step S304), the vehicle 1 is obtained from information other than the format that can be displayed on the monitor device 14 mounted on the vehicle 1. Conversion into information in a format that can be displayed on the monitor device 14 mounted on the computer is executed (step S305). Information in a format that can be displayed on the monitor device 14 mounted on the converted vehicle 1 is stored in the storage unit 21d (step S306). Note that 2b, 2c... Perform the same control.

  FIG. 9 is a flowchart showing communication control between roadside devices according to the present invention. Here, the roadside device 2a is a roadside device that is connected to the Internet and receives and stores information from the information distribution device 3a, and the roadside device 2b is a roadside device that does not receive information from the information distribution device 3a. The CPU (not shown) of the information communication device mounted on the roadside device 2b sends a transmission request to the roadside device 2a at regular intervals (step S401), starts a timer (not shown) and starts timing. (Step S402). When the CPU 21e of the information communication device 21 mounted on the roadside device 2a has not received a transmission request, the CPU 21e waits until it is received (NO in step S403). On the other hand, when the transmission request transmitted from the roadside device 2b is received via the short-range communication unit 21a (YES in step S403), the roadside that has made a transmission request to the information received and stored from the information distribution device 3a. It is determined whether or not transmission information indicating transmission to the device 2b is attached (step S404). As a result, when it is determined that the transmitted information is attached to the information (YES in step S404), transmission to the roadside apparatus 2b is not performed (step S405). On the other hand, when the CPU (not shown) of the information communication device mounted on the roadside device 2b determines that the transmitted information is not attached to the information (NO in step S404), the information is sent from the short-range communication unit 21a. It transmits to the roadside apparatus 2b (step S406).

  The CPU (not shown) of the information communication device mounted on the roadside device 2b has not received via the communication unit 11b within a certain time measured by a timer (not shown) (NO in step S407). ), A transmission request is transmitted to the roadside apparatus 2a at regular intervals (step S401). On the other hand, when the CPU (not shown) of the information communication device mounted on the roadside device 2b receives the information within a certain time (YES in step S407), the CPU receives the information received from the roadside device 2a (not shown). (Step S408), and a transmission request is transmitted to the roadside apparatus 2a at regular intervals (step S401).

  In the above-described embodiment of the present invention, the vehicle 1 includes the communication device 11, the remote control device 12, the communication antenna 13, the monitor device 14, and the audio device 15. However, the present invention is limited to this. Rather, an input unit for inputting a transmission request or destination point information and a transmission request or destination point information received via the input unit are transmitted to the roadside devices 2a, 2b, 2c. A communication unit for receiving position information, map information, traffic information, and guidance route search results transmitted from ..., and an image output unit for outputting position information, map information, traffic information, and guidance route search results Or as long as it has a voice output unit and a storage unit that stores a web browsing program such as a web browser, it is not limited to an in-vehicle device, and has a wireless communication function for web browsing. Mobile terminal, PC equipped with a web browsing enabled wireless communication environment, a general-purpose display device such as a monitor apparatus having a web browsing enabled wireless communication environment may be used in a vehicle.

  In the above-described embodiment of the present invention, the search for the guidance route is performed based on the destination point information, the position information, and the map information. However, the present invention is not limited to this, and the destination point information, the position information, the map information, and the traffic You may search based on information.

  In the above-described embodiment of the present invention, the communication unit 11b and the short-range communication unit 21a perform short-range wireless communication using a wireless LAN. However, the present invention is not limited to this, and infrared communication, Bluetooth, or DSRC is used. Also good.

  In the above-described embodiment of the present invention, the communication unit 21b is connected to the modulation / demodulation device or the line connection device by wire. However, in consideration of ease of installation, the communication unit 21b may perform wireless communication. Good.

  In the above-described embodiment of the present invention, the storage unit 21e periodically receives and stores map information, traffic information, and other information from the information distribution devices 3a, 3b,. Since the storage capacity is limited, for example, only information related to the peripheral range centered on the position where the roadside device 2 is installed may be received and stored.

  In the above-described embodiment of the present invention, the determination as to whether or not the information received from the information distribution apparatuses 3a, 3b,... Is in a predetermined format is triggered by the transmission request received from the roadside apparatus 2b. Although it is executed in 2a, information regarding the format may be transmitted from the vehicle 1, and the determination may be performed using the information as a trigger.

It is a schematic diagram which shows the whole system which concerns on this invention. It is a block diagram which shows the hardware which the vehicle concerning this invention mounts. It is a schematic diagram which shows the road-vehicle communication which concerns on this invention. It is a flowchart which shows communication control with the roadside apparatus which concerns on this invention, and a vehicle. It is a flowchart which shows communication control with the roadside apparatus which concerns on this invention, and a vehicle. It is a flowchart which shows the guidance route search control which the roadside apparatus which concerns on this invention performs. It is a flowchart which shows the guidance route search control which the roadside apparatus which concerns on this invention performs. It is a flowchart which shows the conversion control of the format of the information which the roadside apparatus which concerns on this invention performs. It is a flowchart which shows the communication control between the roadside apparatuses which concern on this invention. It is a flowchart of the control which concerns on the conventional system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2a, 2b, 2c ... Roadside apparatus 3a, 3b ... Information delivery apparatus 21 Information communication apparatus 21a Short-range communication part 21b Communication part 21c Communication control part 21d Storage part 21e CPU
21f memory

Claims (7)

In an information providing system that provides information from each of a plurality of roadside devices to a mobile device in a communicable range,
The mobile device is
Means for transmitting a transmission request to the roadside device;
The roadside device is
Means for storing position information, map information and traffic information attached to the roadside device;
When receiving a transmission request from the mobile device, comprising means for transmitting the location information, map information and traffic information to the mobile device,
The mobile device further includes:
An information providing system comprising: means for displaying the position information, map information, and traffic information received from the roadside device. The mobile device is
Further comprising means for transmitting destination point information about the destination point of movement to the roadside device;
The roadside device is
When receiving destination point information from the mobile device, based on the destination point information, position information and map information, search means for searching for a guidance route to the destination point on the map;
Means for transmitting guidance route information according to a search result to the mobile device;
The mobile device is
The information providing system according to claim 1, further comprising means for displaying the guidance route information received from the roadside device. The roadside device is
Means for converting information in a format that cannot be displayed by the mobile device from an external device into information in a format that can be displayed;
The information providing system according to claim 1, further comprising means for transmitting the converted information to the mobile device when a transmission request is received from the mobile device. One roadside device that has received information from the external device is:
4. The information providing system according to claim 1, further comprising means for transmitting the information to another roadside device.   The information provision according to any one of claims 1 to 4, wherein the communication between the roadside device and the mobile device or the communication between the roadside devices is one of Bluetooth, infrared communication, and wireless LAN. system. A communication means having a communication function with the outside;
Means for storing first position information, map information and traffic information indicating their installation positions;
When the second position information indicating another position is received by the communication means, based on the first position information, the second position information, and the map information, the other position is changed from one position on the map indicated by the map information. Search means for searching for a route to the position,
A roadside device comprising: route information based on the search result, the first position information, map information, and traffic information. Means for converting into information of a predetermined format when receiving information other than a predetermined format from an external device;
The roadside device according to claim 6, further comprising means for transmitting the converted information to the outside when a transmission request is received from the outside.

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