JP2005190240A - Terminal apparatus, information acquisition system and program for information acquiring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently download distribution information by a plurality of communication devices by dividing and transmitting the distribution information. <P>SOLUTION: A terminal apparatus comprises a plurality of communication devices, a download list reception processing means for receiving a download list of distribution information, a communication state decision processing means for deciding whether a vehicle approaches a communicable area in which the vehicle can communicate with a prescribed communication device out of respective communication devices or not, a distribution information division processing means for dividing the download list correspondingly to respective communication devices when the vehicle approaches the communicable area, and a data reception processing means for receiving the data of the distribution information in accordance with the divided download list. Since the distribution information is divided on the basis of related information, the distribution information can be efficiently downloaded by the respective communication devices. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a terminal device, an information acquisition system, and an information acquisition method program.

2. Description of the Related Art Conventionally, navigation devices connect to the Internet using an information communication device that can connect to the Internet using a mobile phone or perform information communication with an access point that provides an Internet connection using a wireless LAN. The distribution information can be downloaded from the server by connecting (for example, refer to Patent Document 1).
JP 2002-236632 A

  However, in the conventional navigation device, the distribution information can be downloaded by switching the mobile phone and the information communication device, but the distribution information cannot be divided into a plurality of communication devices and efficiently downloaded.

  The present invention solves the problems of the conventional navigation device, divides and transmits distribution information, and efficiently downloads the distribution information by a plurality of communication devices, an information acquisition system, and information acquisition The object is to provide a method program.

  For this purpose, in the terminal device of the present invention, communication capable of communicating with a plurality of communication devices, download list reception processing means for receiving a download list of distribution information, and a predetermined communication device among the communication devices. A communication state determination processing means for determining whether or not a vehicle has approached the possible area; a distribution information division processing means for dividing the download list in correspondence with each communication device when the vehicle has approached the communicable area; Data receiving processing means for receiving data of distribution information in accordance with the downloaded download list.

  In the information acquisition system of the present invention, a terminal device having a plurality of communication devices, a download list transmission processing means for transmitting a download list of distribution information to the terminal device, and a predetermined communication device among the communication devices Communication state determination processing means for determining whether or not a vehicle has approached a communicable area capable of communication with the communication, and distribution when the vehicle approaches the communicable area and divides the download list corresponding to each communication device Information division processing means and data reception processing means for receiving distribution information data according to the divided download list.

  In another information acquisition system of the present invention, the distribution information division processing unit further divides the download list based on a threshold value of data size.

  In still another information acquisition system of the present invention, the distribution information division processing unit further divides the download list based on a communication speed of each communication device.

  In still another information acquisition system of the present invention, the information acquisition system further includes a download list integration processing unit that integrates the divided download list when the vehicle leaves the communicable area.

  In the program of the information acquisition method of the present invention, the computer communicates with a predetermined communication device among a plurality of communication devices arranged in a download list reception processing means for receiving a download list of distribution information and a terminal device. A communication state determination processing means for determining whether or not a vehicle has approached a possible communicable area; a distribution information division processing means for dividing the download list in correspondence with each communication device when the vehicle has approached the communicable area; And it is made to function as a data reception processing means for receiving data of distribution information in accordance with the divided download list.

  According to the present invention, distribution information is divided based on related information indicating that a plurality of communication devices are mounted on an information terminal, and data constituting the divided distribution information is transmitted to each communication device. Therefore, the distribution information can be efficiently downloaded by each communication device.

  Therefore, the download time required for downloading the distribution information can be shortened.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram of a navigation system according to the first embodiment of the present invention.

  In the figure, 14 is a navigation device as a mobile terminal device and mounted on a vehicle, 41 is a mobile phone company, 45 is a hot spot, 61 is a personal computer as a user terminal, and 62 is information. An information center as a provider, wherein the navigation device 14 and the personal computer 61 are connected via a wireless LAN (not shown), and the navigation device 14 and the hot spot 45 are connected via a wireless LAN 44; The hot spot 45, the personal computer 61 and the information center 62 are connected via the network 43. The navigation device 14, the mobile phone company 41, the network 43, the wireless LAN 44, the hot spot 45, the personal computer 61, the information center 62, etc. constitute a navigation system.

  The information center 62 includes a server 63 and a database (DB) 64 as a recording unit. The server 63 is provided with a CPU (not shown) as a control device, as well as a RAM, a ROM, A flash memory, a buffer, and the like are incorporated, and a hard disk as a recording medium is provided.

  In the database 64, as basic information of the navigation device 14, that is, navigation information, map data for displaying a map, intersection data regarding each intersection, node data regarding node points, road data regarding roads, routes Search data for searching for and facility data relating to various facilities are recorded respectively. The road data includes data representing highway / toll roads such as highways, city highways, and toll roads as well as general roads such as national roads, prefectural roads and narrow streets.

  By the way, the information center 62 is a traffic information provider, traffic congestion information transmitted from a traffic information transmission center such as a VICS (registered trademark) (Vehicle Information and Communication System) center (not shown). In addition to traffic information including information such as information, parking lot information, traffic accident information, and service area congestion, general information such as news and weather forecasts is provided, and the navigation information is provided.

  Further, the information center 62 functions as an information base, and in addition to traffic information and general information provided by broadcasting stations, content distributors, etc. as other information providers, personal information such as e-mails, TV programs, etc. Content information such as image information constituting a music program, music information constituting a music program, etc. can be provided as distribution information. For this purpose, the server 63 is connected to a WWW (World Wide Web) and opens a site for providing various information to a server of a predetermined provider via the network 43.

  The server 63 sends the various delivery information in the form of data such as text data, audio data, and image data to the personal computer 61 or the navigation device 14 as they are via the network 43, or once (once) records them in the database 64. After that, it is sent to the personal computer 61 or the navigation device 14 via the network 43.

  In the database 64, past traffic information, general information, etc. are recorded as historical data in chronological order as statistical data, and past traffic information, general information, etc. are used as original data. Predetermined processing is performed and processing data is created and recorded. As the processed data, predicted traffic information for predicting traffic conditions on a predetermined route, for example, traffic jam prediction information is created. In creating the processing data, detailed conditions such as date, day of the week, weather, various events, seasons, facility information, etc. are added to the history information as necessary, or general information is referred to. To do.

  As the network 43, the Internet is used. In addition to the Internet, a wireless or wired LAN (Local Area Network), a WAN (Wide Area Network), an intranet, a cellular phone network, a telephone network, public communication Use communication systems such as line networks and dedicated communication lines networks, use communication systems using CS broadcasting, BS broadcasting, terrestrial digital television broadcasting, FM multiplex broadcasting, etc., and in intelligent transportation systems (ITS) It is also possible to use a communication system such as a non-stop automatic fee payment system (ETC) or a narrow area communication system (DSRC).

  The personal computer 61 is installed at a reference point, for example, the operator's home, and is a CPU 71 as a control device, a display unit 72 as a notification device for notifying the operator of various information, an operation unit 73, and a recording unit. Recording device 74, communication unit 75, and the like.

  In this embodiment, a personal computer 61 is used as a user terminal, but a home server can be used instead of the personal computer 61, an electronic notebook, a mobile phone, a mobile terminal, a personal digital assistant (PDA), Various terminal devices such as a videophone and a game machine can be used.

  In the present embodiment, the CPU 71 is used as a control device, but an MPU or the like can be used instead of the CPU 71. As the display unit 72, a display such as a CRT display, a liquid crystal display, or a plasma display can be used. As the operation unit 73, in addition to a keyboard and a mouse, operation members such as a barcode reader, a remote control device for remote operation, a joystick, a light pen, and a stylus pen can be used. In addition, the display unit 72 can function as an operation unit, and a touch panel formed on the display can be used. In the touch panel, an operation unit region such as various keys, switches, buttons, and the like is formed on the display. An input can be performed by touching (pressing down) the operation unit area.

  The recording device 74 includes a built-in internal storage device such as a RAM, a ROM, and a flash memory, and a magnetic disk, for example, a hard disk, as a recording medium. Instead of the hard disk, use an external storage device such as a flexible disk, magnetic tape, magnetic drum, CD-ROM, CD-R, MD, DVD, optical disk, MO, IC card, optical card, memory card, etc. You can also. In order to use the hard disk, the recording device 74 is provided with a reading device for reading data recorded on the hard disk and a writing device for recording data on the hard disk.

  The hot spot 45 is composed of a restaurant or the like, and an access point (not shown) connected to the wireless LAN 44 is disposed in the hot spot 45. Accordingly, the navigation device 14 is connected to the network 43 by accessing an access point provided in the hot spot 45 when the vehicle is driven or parked in the communicable area of the wireless LAN 44. be able to.

  The navigation device 14 records various data in addition to the GPS sensor 15 as a current location detection unit that detects a current location and the like representing the position of the vehicle by receiving radio waves generated by an artificial satellite, and the navigation information. A data recording unit 16 as a recording unit, a navigation processing unit 17 that performs various arithmetic processes based on various programs, data, and the like, a direction sensor 18 as a direction detection unit that detects the vehicle direction, and an operator. An operation unit 34 as a first input unit for performing a predetermined input by a driver's operation, a first display for performing various displays by an image displayed on a screen (not shown) and notifying the driver A display unit 35 as an output unit, a voice input unit 36 as a second input unit for performing predetermined input by voice, and various information by voice A voice output unit 37 serving as a second output unit for notifying the driver, a communication device that can be connected to the network 43, the wireless LAN 44, and the like. The first communication device 38 as a first communication unit capable of performing communication), a mobile phone that can be connected to the mobile phone company 41, etc., and low-speed communication over a wide area (hereinafter referred to as “wide-area low-speed communication”). A second communication device 39 or the like as a second communication unit capable of performing the operation, and the navigation processing unit 17 includes an operation unit 34, a display unit 35, a voice input unit 36, a voice output unit 37, and first, Second communication devices 38 and 39 are connected. The navigation processing unit 17 is also connected to a vehicle speed sensor (not shown) as a vehicle speed detection unit.

  In the present embodiment, the navigation device 14 is used as a terminal device for movement, but instead of the navigation device 14, the various terminal devices described above can be used.

  The data recording unit 16 is provided with a magnetic disk, for example, a hard disk, as a recording medium. As the recording medium, an external storage device as described above can be used instead of the hard disk. In order to use the hard disk, the data recording unit 16 is also provided with a reading device and a writing device as described above.

  The navigation processing unit 17 includes a CPU 31 as a control device that controls the entire navigation device 14, a RAM 32 such as a DRAM, SRAM, MRAM, or FeRAM used as a working memory when the CPU 31 performs various arithmetic processes. ROM 33 in which the above program is recorded, a flash memory (not shown), and the like.

  By the way, various programs can be recorded in the ROM 33 and various data can be recorded in the data recording unit 16, but programs, data, and the like can also be recorded in the hard disk. In this case, the program, data, etc. can be read from the hard disk and written to the flash memory. Therefore, the program, data, etc. can be updated by replacing the hard disk. Further, when an automatic transmission control device is mounted to control an automatic transmission (not shown) mounted on the vehicle, the control program, data, etc. for the automatic transmission control device are also stored in the hard disk. Can be recorded. Further, the program, data, etc. can be received via the first and second communication devices 38, 39 and written to the flash memory.

  In addition, a microphone or the like can be used as the voice input unit 36, and a voice synthesizer and a speaker can be used as the voice output unit 37. Predetermined information can be obtained from the voice synthesized by the voice synthesizer. Is output. In addition to the voice synthesized by the voice synthesizer, various sounds, predetermined information recorded in advance on a tape, a memory, or the like can be output.

  The first communication device 38 receives various information transmitted from the traffic information transmission center as a radio beacon, an optical beacon, etc. via a radio beacon device, an optical beacon device, etc. arranged along the road. A beacon receiver, an FM receiver for receiving an FM multiplex broadcast via an FM broadcast station, and the like. Then, traffic information can be received by the beacon receiver, and general information can be received as FM multiplexed information in addition to the traffic information by the FM receiver.

  Further, the first and second communication devices 38 and 39 are used to obtain traffic information, general information, etc. via the network 43, the information center 62, etc., and the network 43 is established using the information center 62 as an information base. The distribution information can be acquired and downloaded by accessing the provider's home page via the Internet. In this case, the first communication device 38 and the information center 62 are connected to each other via an access point (not shown) and the network 43 provided in the first communication device 38, and the second communication device 39 and the information center. 62 is connected to the mobile phone company 41 and the network 43. It should be noted that when the ignition switch (not shown) as the activation member is turned on, the first position is also detected when the vehicle is located in a communicable area such as an access point, for example, an access point provided in the hot spot 45. The communication device 38 and the information center 62 can be connected via each access point and the network 43. The first communication device 38 also functions as a current location detection unit, and receives position information by a radio wave beacon, an optical beacon, or the like, and detects the current location.

  The navigation device 14 and the personal computer 61 are connected by a wireless LAN so that bidirectional communication can be performed. For this reason, the communication unit 75 is not shown for connecting the personal computer 61 to the information center 62. An access point (not shown) or the like for connecting the modem and the personal computer 61 to the navigation device 14 via the first communication device 38 via the wireless LAN is provided. Further, slots (not shown) such as a PCMCIA slot and a PC card slot are formed in the first communication device 38, and a wireless card is inserted into the slot.

  In this embodiment, the navigation device 14 and the personal computer 61 are connected by a wireless LAN. In other embodiments, the navigation device 14 and the personal computer 61 are connected by a wired LAN. Is done. In this case, a hub (not shown) is disposed in the communication unit 75, and the hub and the first communication device 38 are detachably connected by a cable.

  The CPUs 31, 71, the personal computer 61, the server 63, the provider server, the navigation processing unit 17, etc. function as computers based on predetermined programs, data, etc., independently or in combination of two or more. To do.

  In this embodiment, the personal computer 61 installed at the operator's home as the reference point is used, but various facilities such as the operator's work place and restaurant are used as the reference point, Personal computers installed in various facilities can be used.

  By the way, the navigation device 14 having the above-described configuration includes a plurality of first and second communication devices 38 and 39 in the present embodiment, and information is transmitted by the first and second communication devices 38 and 39. The distribution information distributed from the center 62 can be downloaded. Therefore, the first and second communication devices 38 and 39 are used at the same time, the distribution information that the driver wants to download is divided and received by the first and second communication devices 38 and 39 at the same time, and data recording is performed. The time required for recording in the unit 16, that is, the download time is shortened.

  For this purpose, the information center 62 sends the various distribution information to the network 43, the first communication device 38, the access point provided in the hot spot 45, etc. according to the driver's distribution request. To the first communication device 38, or to the second communication device 39 via the network 43 and the mobile phone company 41. In the present embodiment, the navigation device 14 includes the first and second communication devices 38 and 39, but may include three or more communication devices.

  Next, the operation when the navigation system configured as described above is used as an information acquisition system and various kinds of distribution information are downloaded from the information center 62 in the navigation device 14 will be described.

  FIG. 2 is a main flowchart showing the operation of the information acquisition system in the first embodiment of the present invention, FIG. 3 is a diagram showing a subroutine of the divided download list creation processing in the first embodiment of the present invention, and FIG. FIG. 5 is a conceptual diagram illustrating an information acquisition method according to the first embodiment of the present invention, FIG. 5 is a diagram illustrating a method for downloading distribution information by the first communication device according to the first embodiment of the present invention, and FIG. It is a figure which shows the data division | segmentation method in the 1st Embodiment of this invention.

  First, when the driver turns on the ignition switch, activates the navigation device 14 (FIG. 1), and operates the operation unit 34 to input distribution request for predetermined distribution information, the CPU 31 is illustrated. The transmission processing means that is not performed performs transmission processing and transmits a distribution request to the information center 62. On the other hand, in the information center 62, the communication device specifying processing unit (not shown) of the server 63 performs communication device specifying processing, refers to the communication device management unit 21 set in the RAM of the server 63, and the navigation device 14 In the present embodiment, the second communication device 39 is specified by the address ad2.

  In the present embodiment, the first and second communication devices 38 and 39 are assigned IP addresses ad1 and ad2 as related information for identifying each and representing the respective relationships. The IP addresses ad1 and ad2 are recorded in the communication device management unit 21 in advance. As related information, the navigation ID assigned to the navigation device 14, the device-specific ID assigned to the first and second communication devices 38 and 39, and the first and second communication devices 38 and 39 It is also possible to use a given telephone number or the like.

  Then, the download list creation processing means (not shown) of the server 63 performs download list creation processing, and based on the delivery request sent from the navigation device 14, data representing the delivery information that the driver intends to download, that is, A download list LST is created for the download data D1, and then the transmission processing means (not shown) of the server 63 performs transmission processing and transmits the download list LST to the navigation device 14. Next, in the navigation device 14, reception processing means (not shown) of the CPU 31 performs reception processing and records the download list LST in the RAM 32. The download data D1 is composed of one or more files, and each file is composed of data. The download list LST is a list in which the name of each file, the size of each data (hereinafter referred to as “data size”) and the like are recorded in a list format.

  Next, the transmission processing means of the server 63 starts transmission of the download data D1 to the navigation device 14. In the navigation device 14, the reception processing means of the CPU 31 starts reception of the download data D <b> 1 by the second communication device 39. That is, in the information center 62, the transmission processing unit sequentially selects each file and transmits data to the navigation device 14. In the navigation device 14, the reception processing unit receives the data transmitted from the information center 62. A recording processing unit (not shown) of the CPU 31 performs a recording process and records data in the flash memory. In this way, download of distribution information is started.

  The reception processing means determines whether reception of data of one file has been completed, and deletes a file whose reception has been completed from the download list LST every time reception of data of one file is completed, Prevent data from the same file from being sent again.

  Further, when the driver operates the operation unit 34 to input the departure place and the destination, the search condition setting processing unit (not shown) of the CPU 31 performs the search condition setting process, and the departure place and the destination are used as the search conditions. Set. Subsequently, the route search information acquisition processing unit (not shown) of the CPU 31 performs route search information acquisition processing, reads the search data from the data recording unit 16, and acquires traffic information, statistical data, and the like from the information center 62 as necessary. To do. Next, a route search processing unit (not shown) of the CPU 31 performs route search processing, and according to the search conditions, based on the search data and, if necessary, traffic information, statistical data, etc. in addition to the search data. A route is searched based on the route, and route guidance data for the searched route, that is, the searched route Rt is created.

  In the present embodiment, the route search process is performed in the navigation device 14, but the route search process can be performed in the information center 62. In that case, the route guidance data is transmitted from the information center 62 to the navigation device 14.

  Next, the route guidance processing means (not shown) of the CPU 31 starts the route guidance processing, forms a map screen on the display unit 35 based on the route guidance data, and displays the current location and a map around the current location on the map screen. In addition to displaying the direction of the vehicle, the search route Rt around the current location is displayed, and a guidance voice is output by the voice output unit 37 to perform route guidance.

  Therefore, the driver can drive the vehicle in accordance with the current location displayed on the map screen, the surrounding map, the vehicle direction and the search route Rt, and the guidance voice.

  By the way, while driving the vehicle according to the route guidance, the communication state determination processing unit (not shown) of the CPU 31 performs the communication state determination process, reads the current location, and stores the hot spot data table recorded in the data recording unit 16. With reference to the communication area ARu (u = 1), the distance from the current location to the hot spot 45 is calculated, and the vehicle can communicate with the first communication device 38 formed for each access point of the hot spot 45. , 2, ...). In the hot spot data table, the location of the hot spot 45, the communicable area ARu of the hot spot 45, a password for accessing each access point, an ID number, and the like are recorded.

  Then, as shown in FIG. 5A, when the vehicle approaches the communicable area ARu, the divided download list creation as the distribution information division processing means of the CPU 31 and the divided download list creation processing means The unit 22 performs an acquisition information division process and a divided download list creation process, assigns the data transmitted from the information center 62 to the first and second communication devices 38 and 39, and receives the data at that time. Distribution to be downloaded by dividing the list LSTk so as to correspond to the first and second communication devices 38 and 39 and creating the first and second divided download lists LSi (i = 1, 2). Divide the information.

  The download data D1 is composed of one or more file data as described above, and the file data transmitted from the information center 62 is received by the second communication device 39 while the vehicle is running. Then, the data file transmitted from the download list LST is deleted. Accordingly, when the files in the download list LSTk are fj (j = 1, 2,...), The number of the files fj is smaller than the number of files in the download list LST.

  The divided download list creation unit 22 reads the download list LSTk from the RAM 32 and sets a threshold for dividing the download list LSTk.

  In the present embodiment, since the download list LSTk is divided into two, one threshold value may be set.

Therefore, the divided download list creating unit 22 assumes that the data fj of the download list LSTk is dj (j = 1, 2,...), And the data size Qdj (j = 1, 2,...) Of the data dj. ) Based on the total ΣQdj
Qav = ΣQdj / j
And the average value Qav is set as a threshold for dividing the download list LSTk. When the files fj are arranged from the smallest to the largest data size Qdj, the data size of the j / 2 largest file, that is, the median value of all the files fj is used as a threshold, When the data size Qdj is arranged from a small one to a large one, the data size of a file having a predetermined nth largest data size can be set as a threshold value.

  Therefore, the divided download list creation unit 22 divides the download list LSTk based on the threshold value. That is, the divided download list creation unit 22 determines whether or not the data size Qdj is greater than or equal to the threshold for the data dj constituting each file fj. If the data size Qdj is greater than or equal to the threshold, If it is added to the first divided download list LS1 for the communication device 38 and the data size Qdj is smaller than the threshold, the file is added to the second divided download list LS2.

  For example, in the download list LSTk shown in FIG. 6, each data d1, d4, d8,... Has a data size Qdj that is equal to or larger than a threshold value, and is assigned to the first divided download list LS1, and data d2, d3, d5. , D6, d7, d9,... Are assigned to the second divided download list LS2 because the data size Qdj is smaller than the threshold value.

  Subsequently, the communication device identification processing means of the server 63 refers to the communication device management unit 21 and refers to another communication device disposed in the navigation device 14, in the present embodiment, the first communication device 38. Is specified by the IP address ad1, and the first communication device 38 and the second communication device 39 are associated with each other by the IP addresses ad1 and ad2.

  Therefore, the communication device specifying processing means indicates that the first and second communication devices 38 and 39 are related to each other and are mounted on one navigation device 14 based on the IP addresses ad1 and ad2. Record in a buffer.

  Subsequently, the communication state determination processing means of the CPU 31 reads the current location, calculates the distance from the current location to the hot spot 45, and determines whether the vehicle has entered the communicable area ARu, as shown in FIG. ), When the vehicle enters the communicable area ARu, the transmission processing unit of the CPU 31 transmits the distribution request to the information center 62.

  When the distribution request is transmitted in the information center 62, the transmission processing means of the server 63 receives the data dj of each file fj allocated to the first and second divided download lists LS1, LS2. 1. Simultaneously transmit to the second communication device 38, 39. Further, in the navigation device 14, the reception processing means receives the data dj of each file fj via the first and second communication devices 38 and 39, and the recording processing means records the received data dj. .

  In the navigation device 14, the recording processing means determines whether or not reception of data of one file has been completed, and the first and second divided downloads are performed each time reception of data of one file is completed. The file that has been received is deleted from the lists LS1 and LS2, and the data of the same file is prevented from being received again.

  In this way, the data dj of each file fj allocated to the first and second divided download lists LS1 and LS2 is simultaneously transmitted to the first and second communication devices 38 and 39 and recorded in the data recording unit 16. The distribution information is downloaded at the same time.

  Subsequently, when the vehicle leaves the communicable area ARu, the download list integration processing means (not shown) of the CPU 31 performs download list integration processing, and each file in the first and second divided download lists LS1, LS2 Are combined to form a new download list LSTk.

  In addition, even when the vehicle leaves the communicable area ARu without entering the communicable area ARu, the download list integration processing means performs the data of each file in the first and second divided download lists LS1 and LS2. Are combined to form a new download list LSTk.

  Thus, in the present embodiment, since the download data D1 can be received by the first and second communication devices 38 and 39 associated with each other, the first and second communication devices 38 and 39 can be received. Can be used to efficiently download distribution information.

  Therefore, the download time required for downloading the distribution information can be shortened.

  By the way, in the present embodiment, in order to shorten the download time, the data dj of each file fj is simultaneously transmitted by the first and second communication devices 38 and 39 while the vehicle travels in the communicable area ARu. If the data scheduled to be received by one of the first and second communication devices 38 and 39 is lost, then the data is transmitted only to the other communication device. As a result, the download time becomes longer.

  However, in this embodiment, when the user exits from the communicable area ARu, the download list integration processing unit integrates the data of the files in the first and second divided download lists LS1 and LS2, Since the new download list LSTk is formed, the new download list LSTk can be appropriately divided when the vehicle next enters the communicable area ARu. Therefore, the download time can be further shortened.

Next, the flowchart of FIG. 2 will be described.
Step S1: Turn on the ignition switch.
Step S2: Download list is received.
Step S3 Downloading is started.
Step S4: Route search processing is performed.
Step S5: Route guidance is started.
Step S6 The system waits for approaching the communicable area ARu, and proceeds to step S7 when approaching the communicable area ARu.
Step S7: A divided download list creation process is performed.
Step S8: It is determined whether or not the communication area ARu has been entered. When entering the communicable area ARu, the process proceeds to step S10, and when not entering, the process proceeds to step S9.
Step S9: It is determined whether the vehicle has exited without entering the communicable area ARu. If the user exits without entering the communicable area ARu, the process proceeds to step S12. If the user exits without entering the communicable area ARu, the process returns to step S8.
Step S10: The data dj is allocated to the first and second divided download lists LS1, LS2, and the distribution information is downloaded.
Step S11: It is determined whether the user exits the communicable area ARu. If it has left the communicable area ARu, the process proceeds to step S12. If it has not left, the process returns to step S10.
Step S12: Download list integration processing is performed, and the process returns to step S6.

Next, the flowchart of FIG. 3 will be described.
Step S7-1: Download list LSTk is read.
Step S7-2: A threshold for dividing the download list LSTk is set.
Step S7-3: It is determined whether or not the data size Qdj is greater than or equal to a threshold value. If the data size Qdj is greater than or equal to the threshold, the process proceeds to step S7-4. If the data size Qdj is smaller than the threshold, the process proceeds to step S7-5.
Step S7-4: Add the file to the first divided download list LS1 and return.
Step S7-5: Add the file to the second divided download list LS2 and return.

  Next, a second embodiment of the present invention will be described.

  FIG. 7 is a diagram showing a data dividing method according to the second embodiment of the present invention.

  In this case, the divided download list creation unit 22 as the distribution information division processing means of the CPU 31 (FIG. 4) and the divided download list creation processing means sends the download data D1 to the first and second communication devices. The first and second divided download lists LSi are formed on the basis of the download list LSTk so as to be divided by 38 and 39 for reception. Therefore, the divided download list creation unit 22 reads the communication speeds r1 and r2 when the first and second communication devices 38 and 39 are used, and the first and second communication speeds r1 and r2 are used to read the first and second communication speeds r1 and r2. 2 divided download lists LS1 and LS2. The communication speeds r1 and r2 are recorded in advance in the ROM 33 (FIG. 1).

In this case, the communication speed r1 is higher than the communication speed r2, and the amount of data per unit time that can be received by the first communication device 38 is per unit time that can be received by the second communication device 39. More than the amount of data. Therefore, the file received by the first communication device 38 is fα (α = 1, 2,...), The file received by the second communication device 39 is fβ (β = 1, 2,. When the total data amount of fα is Σfα and the total data amount of the file fβ is Σfβ,
Σfα / Σfβ = r1 / r2
Thus, the first and second divided download lists LS1 and LS2 are created. Thus, in the present embodiment, the distribution information can be divided based on the communication speeds r1 and r2 of the first and second communication devices 38 and 39.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a block diagram of the navigation system in a 1st embodiment of the present invention. It is a main flowchart which shows operation | movement of the information acquisition system in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the division | segmentation download list creation process in the 1st Embodiment of this invention. It is a conceptual diagram which shows the information acquisition method in the 1st Embodiment of this invention. It is a figure which shows the method to download delivery information by the 1st communication apparatus in the 1st Embodiment of this invention. It is a figure which shows the data division | segmentation method in the 1st Embodiment of this invention. It is a figure which shows the data division | segmentation method in the 2nd Embodiment of this invention.

Explanation of symbols

14 navigation device 16 data recording unit 17 navigation processing unit 22 divided download list creation units 31, 71 CPU
38, 39 First and second communication devices 41 Mobile phone company 43 Network 44 Wireless LAN
45 Hot spot 61 PC 62 Information center 63 Server ARu Communication area

Claims (6)

  It is determined whether or not the vehicle has approached a communicable area in which communication is possible with a plurality of communication devices, a download list reception processing means for receiving a download list of distribution information, and a predetermined communication device among the communication devices. Communication status determination processing means, distribution information division processing means for dividing the download list corresponding to each communication device when a vehicle approaches the communicable area, and receiving distribution information data according to the divided download list And a data reception processing means.   A communicable area capable of communicating with a terminal device having a plurality of communication devices, a download list transmission processing means for transmitting a download list of distribution information to the terminal device, and a predetermined communication device among the communication devices. A communication state determination processing unit that determines whether or not the vehicle has approached, a distribution information division processing unit that divides the download list corresponding to each communication device when the vehicle approaches the communicable region, An information acquisition system comprising: data reception processing means for receiving distribution information data according to a download list.   The information acquisition system according to claim 2, wherein the distribution information division processing unit divides the download list based on a data size threshold.   The information acquisition system according to claim 2, wherein the distribution information division processing unit divides the download list based on a communication speed of each communication device.   The information acquisition system according to claim 2, further comprising a download list integration processing unit that integrates the divided download list when the vehicle leaves the communicable area. Download list reception processing means for receiving a download list of distribution information, whether the vehicle has approached a communicable area where communication with a predetermined communication device among a plurality of communication devices arranged in the terminal device is possible Communication state determination processing means for determining the distribution information, distribution information division processing means for dividing the download list corresponding to each communication device when the vehicle approaches the communicable area, and distribution information data according to the divided download list A program for an information acquisition method, wherein the program functions as data reception processing means for receiving a message.

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