JP2005191778A - Information distribution system and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To separate and transmit distribution information and download the distribution information effectively by two or more communication devices. <P>SOLUTION: The system includes a communication device management unit for recording information which shows that two or more communication devices are mounted on the terminal device as related information, a distribution information dividing processing means for dividing the distribution information based on the related information, and a transmission processing means for distributing data which constitute divided distribution information to each communication device. The distribution information is divided based on the related information which shows that the two or more communication devices are mounted on the information terminal, and the data which constitute the divided distribution information can be transmitted to each communication device. Accordingly, the distribution information can be downloaded by each communication device effectively. As a result, the distribution time necessary for distributing the distribution information can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information distribution system and an information distribution method.

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 provides an information distribution system and an information distribution method capable of solving the problems of the conventional navigation device, dividing and transmitting distribution information, and efficiently downloading the distribution information by a plurality of communication devices. The purpose is to do.

  Therefore, in the information distribution system of the present invention, a communication device management unit that records that a plurality of communication devices are mounted on a terminal device as related information, and distribution information that divides the distribution information based on the related information Division processing means, and transmission processing means for transmitting data constituting the divided distribution information to each communication device.

  In another information distribution system of the present invention, a terminal device provided with a plurality of communication devices and a recording unit, and a relationship indicating distribution of the communication information to be downloaded to the recording unit in the terminal device. Distribution information dividing processing means for dividing based on information, and transmission processing means for transmitting data constituting divided distribution information to each communication device.

  In still another information distribution system of the present invention, the distribution information division processing unit divides the distribution information by dividing the download list of the distribution information and creating a divided download list.

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

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

  In still another information distribution system of the present invention, it is further determined whether there is data scheduled to be transmitted to each communication device, and when there is no data scheduled to be transmitted to a predetermined communication device, other communication is performed. Distribution adjustment processing means for transferring data to be transmitted to the apparatus to the predetermined communication apparatus and transmitting the data.

  In still another information distribution system of the present invention, the distribution adjustment processing unit selects data having a size corresponding to a predetermined communication device as data to be transmitted to the predetermined communication device.

  In the information distribution method of 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 distributed to each communication device. Send.

  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, it is possible to shorten the delivery time necessary for delivering the delivery information.

  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 an 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 is provided as a recording medium.

  In the database 64, basic information of the navigation device 14, that is, map data for displaying a map as navigation information, intersection data regarding each intersection, node data regarding node points, road data regarding roads, and routes are stored. Search data for searching and facility data relating to various facilities are recorded. 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.

  Furthermore, 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 music, music information constituting music programs, and the like 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.

  For this purpose, the server 63 sends the various distribution 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, or once (once) a database. After being recorded in 64, it is sent to the personal computer 61 or the navigation device 14 via the network 43.

  Further, past traffic information, general information, etc. are recorded as statistic data in time series as statistical data in the database 64, and past traffic information, general information, etc. are used as original data. Processing data is created and processed data is 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 the control device, but an MPU or the like may 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. Therefore, the navigation device 14 can be connected to the network 43 by accessing the access point of the hot spot 45 when the vehicle is driven or parked in the communicable area of the wireless LAN 44.

  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. 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.

  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 road traffic information 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 to the data recording unit 16 by accessing the home page of the provider. In this case, the first communication device 38 and the information center 62 include an access point (not shown) disposed in the first communication device 38, an area where communication is possible when an ignition switch (not shown) of the vehicle is turned on, That is, an access point in a communicable area, for example, an access point arranged in the hot spot 45, and the network 43 are connected, and the second communication device 39 and the information center 62 are a mobile phone company. 41 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 configuration includes two first and second communication devices 38 and 39, and distribution information distributed from the information center 62 by the first and second communication devices 38 and 39. Can be received and downloaded to the data recording unit 16. Therefore, the first and second communication devices 38 and 39 are used at the same time, and the distribution information that the driver desires to download is divided and simultaneously transmitted to the first and second communication devices 38 and 39 for distribution. The time required for this, ie, the delivery time is shortened.

  For this purpose, the information center 62 transmits the various distribution information to the first communication device 38 via the network 43, the first communication device 38, the access point provided in the hot spot 45, and the like. Or transmitted to the second communication device 39 via the network 43 and the mobile phone company 41.

  Next, the operation in the case where various types of distribution information are distributed from the information center 62 to the navigation device 14 using the navigation system having the above configuration as an information distribution system will be described.

  FIG. 2 is a main flowchart showing the operation of the information distribution system according to the first embodiment of the present invention, FIG. 3 is a diagram showing a divided download list creation processing subroutine according to the first embodiment of the present invention, and FIG. The figure which shows the subroutine of the delivery adjustment process in the 1st Embodiment of this invention, FIG. 5 is a conceptual diagram which shows the information delivery method in the 1st Embodiment of this invention. FIG. 6 is a diagram showing a data dividing method according to the first embodiment of the present invention.

  First, when a driver requests distribution of predetermined distribution information by operating the operation unit 34 (FIG. 1) and sending a distribution request to the information center 62, a download list creation process (not shown) of the server 63 is performed in the information center 62. The means performs a download list creation process, creates a download list LST for data representing distribution information that the driver intends to download based on the distribution request sent from the navigation device 14, that is, download data D1, and Recorded in 63 RAM. The download data D1 is composed of one or more files fj (j = 1, 2,..., M), and each file fj is composed of data dj (j = 1, 2,..., M). . The download list LST is a list in which the name of each file fj, the size of each data dj, that is, the data size, and the like are recorded in a list format. In FIG. 5, 16 is a data recording unit, and 17 is a navigation processing unit.

  Subsequently, a communication device identification processing unit (not shown) of the server 63 performs communication device identification processing, refers to the communication device management unit 21 set in the RAM, and includes a plurality of communication devices disposed in the navigation device 14; In the present embodiment, the first and second communication devices 38 and 39 are specified and associated with each other. In the present embodiment, the first and second communication devices 38 and 39 are assigned IP addresses ad1 and ad2 as related information representing the respective relationships, and the IP addresses ad1 and ad2 are assigned in advance to the communication device. It is recorded in the management unit 21. 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. 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 You can use your phone number.

  Next, the divided download list creation unit 22 as the distribution information division processing means of the server 63 and as the divided download list creation processing means performs distribution information division processing and divided download list creation processing, and download data D1 In order to allocate and transmit each data dj to each of the first and second communication devices 38 and 39, the download list LST is divided based on the IP addresses ad1 and ad2, and the first and second divided download lists LSi are divided. The distribution information is divided by creating (i = 1, 2).

  For this purpose, the divided download list creation unit 22 reads the download list LST from the RAM and sets a threshold for dividing the download list LST.

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

Therefore, the divided download list creation unit 22 calculates the average value Qav based on the sum ΣQdj of the data sizes Qdj (j = 1, 2,..., M) of the data dj of each file fj.
Qav = ΣQdj / j
And the average value Qav is set as a threshold for dividing the download list LST. When the files fj are arranged from the smallest to the largest data size Qdj, the data size of the second largest file, that is, the median value of all the files fddj is used as a threshold value, or each file fj is When the data size Qdj is arranged from the smallest to the largest, the data size of a file having a predetermined nth largest data size Qdj can be used as a threshold value.

  Subsequently, the divided download list creation unit 22 divides the download data D1 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 the data size is smaller than the threshold value, the file is added to the second divided download list LS2 when added to the first divided download list LS1 for the communication device 38.

  For example, in the download list LST 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 allocated 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, a transmission processing unit (not shown) of the server 63 performs transmission processing, and the data dj of each file fj allocated to the first and second divided download lists LS1 and LS2 is transmitted to the first and second communication devices. 38 and 39 are transmitted simultaneously. Then, the server 63 determines whether or not the transmission of the data of one file is completed, and deletes the data of the file whose transmission is completed from the download list LST every time transmission of the data of one file is completed. Prevent the same file from being sent again.

  By the way, in the present embodiment, in order to shorten the distribution time, each file allocated to the first and second divided download lists LS1 and LS2 simultaneously to the first and second communication devices 38 and 39, respectively. The data dj of fj is transmitted, but when there is no data scheduled to be transmitted to one of the first and second communication devices 38 and 39, the other communication device is thereafter sent. Only data will be transmitted, and the delivery time will be increased accordingly.

  Therefore, the distribution adjustment processing unit (not shown) of the server 63 performs distribution adjustment processing and transmits it to one of the first and second communication devices 38 and 39, for example, the first communication device 38. When there is no scheduled data, the distribution adjustment processing unit determines whether there is data scheduled to be transmitted to the second communication device 39 which is the other communication device, and is scheduled to transmit to the second communication device 39. If there is data, the data having the largest data size is selected, transferred to the first communication device 38 and transmitted. Therefore, data corresponding to the first communication device 38 among data scheduled to be transmitted to the second communication device 39, that is, data having a larger data size can be transmitted to the first communication device 38 in order. Therefore, the total data amount representing the total data size of data scheduled to be transmitted to the second communication device 39 can be sufficiently reduced, and the delivery time can be further shortened.

  On the other hand, when there is no data scheduled to be transmitted to the other communication device of the first and second communication devices 38, 39, for example, the second communication device 39, the distribution adjustment processing means It is determined whether there is data scheduled to be transmitted to the first communication device 38, which is the communication device of the first communication device, and when there is data scheduled to be transmitted to the first communication device 38, the data size of the data is the largest A smaller one is selected and transferred to the second communication device 39 for transmission. Therefore, data corresponding to the second communication device 39 among data scheduled to be transmitted to the first communication device 38, that is, data having a smaller data size can be transmitted to the second communication device 39 in order. In addition to reducing the total amount of data representing the total data size of data scheduled to be transmitted to the first communication device 38 and further reducing the delivery time, the second communication device 39 has a large data size. By transmitting data, it is possible to prevent an excessive load from being applied to the second communication device 39.

  In this way, when transmission of all the data dj is completed, the server 63 ends the processing.

  As described above, in the present embodiment, the download data D1 is divided and transmitted to the first and second communication devices 38 and 39 associated with each other. The distribution information can be efficiently downloaded by using the two communication devices 38 and 39 simultaneously.

  Therefore, it is possible to shorten the delivery time necessary for delivering the delivery information.

Next, the flowchart of FIG. 2 will be described.
Step S1: A download list LST is created.
Step S2: The first and second communication devices 38 and 39 are associated.
Step S3: A divided download list creation process is performed.
Step S4: Data dj is transmitted.
Step S5: It is determined whether or not the transmission of the data of one file has been completed. If the transmission of data of one file is completed, the process proceeds to step S6, and if not completed, the process returns to step S4.
Step S6: Delete the data of the file that has been transmitted from the download list LST.
Step S7: Distribution adjustment processing is performed.
Step S8: It is determined whether or not the transmission of the data dj of all the files fj has been completed. If the transmission of the data dj of all the files fj is finished, the process is finished, and if not finished, the process returns to step S4.

Next, the flowchart of FIG. 3 will be described.
Step S3-1: Download list LST is read.
Step S3-2: A threshold for dividing the download list LST is set.
Step S3-3: Determine whether the data size is greater than or equal to the threshold. If the data size is greater than or equal to the threshold, the process proceeds to step S3-4. If the data size is smaller than the threshold, the process proceeds to step S3-5.
Step S3-4: The file is added to the first divided download list LS1, and the process returns.
Step S3-5: The file is added to the second divided download list LS2, and the process returns.

Next, the flowchart of FIG. 4 will be described.
Step S7-1: It is determined whether or not there is data scheduled to be transmitted to the first communication device 38. If there is no data scheduled to be transmitted to the first communication device 38, the process proceeds to step S7-2, and if present, the process proceeds to step S7-4.
Step S7-2: It is determined whether there is data scheduled to be transmitted to the second communication device 39. If there is data scheduled to be transmitted to the second communication device 39, the process proceeds to step S7-3, and otherwise returns.
Step S7-3: Select the data having the largest data size from the data scheduled to be transmitted to the second communication device 39, transmit it to the first communication device 38, and return to Step S7-1.
Step S7-4: It is determined whether there is data scheduled to be transmitted to the second communication device 39. If there is no data scheduled to be transmitted to the second communication device 39, the process returns, and if there is, the process proceeds to step S7-5.
Step S7-5: It is determined whether there is data scheduled to be transmitted to the first communication device 38. If there is data scheduled to be transmitted to the first communication device 38, the process proceeds to step S7-6, and if not, the process returns.
Step S7-6: Select the data with the smallest data size from the data scheduled to be transmitted to the first communication device 38, transmit it to the second communication device 39, and return to Step S7-1.

  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 distribution information division processing means of the server 63 (FIG. 5) and the divided download list creation section 22 as the divided download list creation processing means send the download data D1 to the first and second communication devices 38, respectively. , 39, the first and second divided download lists LSi are formed based on the download list LST. 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 from the communication device management unit 21, and the communication speeds r1 and r2 are read. Is assigned to the first and second divided download lists LSi. The communication speeds r1 and r2 are recorded in the communication device management unit 21 in advance.

In this case, the communication speed r 1 is higher than the communication speed r 2, and the amount of data per unit time that can be transmitted to the first communication device 38 is per unit time that can be transmitted to the second communication device 39. More than the amount of data. Therefore, a file to be transmitted to the first communication device 38 is denoted by fα (α = 1, 2,...), A file to be transmitted to the second communication device 39 is denoted by 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 this embodiment, after deleting the file data that has been transmitted from the download list LST in step S6, the distribution adjustment process is performed in step S7. Can perform the divided download list creation process in step S3 again instead of the distribution adjustment process. As a result, transmission of the data of one file is completed, and each time the data of the file whose transmission is completed is deleted from the download list LST, the data of the remaining file is allocated to the first and second communication devices 38 and 39. be able to.

  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.

1 is a block diagram of a navigation system in an embodiment of the present invention. It is a main flowchart which shows operation | movement of the information delivery 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 figure which shows the subroutine of the delivery adjustment process in the 1st Embodiment of this invention. It is a conceptual diagram which shows the information delivery method 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
41 Mobile phone company 43 Network 44 Wireless LAN
45 Hot spot 61 Personal computer 62 Information center 63 Server ad1, ad2 IP address

Claims (8)

  A communication device management unit that records that a plurality of communication devices are mounted on a terminal device as related information, a distribution information division processing unit that divides distribution information based on the related information, and a divided distribution information Transmission processing means for transmitting data to be transmitted to each communication device.   A terminal device having a plurality of communication devices and a recording unit, and distribution information dividing processing means for dividing distribution information to be downloaded to the recording unit in the terminal device based on related information representing the relationship between the communication devices. And a transmission processing means for transmitting the data constituting the divided distribution information to each communication device.   The information distribution system according to claim 1 or 2, wherein the distribution information division processing unit divides the distribution information by dividing the download list of the distribution information and creating a divided download list.   The information distribution system according to claim 1, wherein the distribution information division processing unit divides the distribution information based on a data size threshold.   The information distribution system according to claim 1, wherein the distribution information division processing unit divides the distribution information based on a communication speed of each communication device.   It is determined whether there is data scheduled to be transmitted to each communication device, and when there is no data scheduled to be transmitted to a predetermined communication device, the data scheduled to be transmitted to another communication device is transmitted to the predetermined communication device. The information distribution system according to claim 1, further comprising distribution adjustment processing means for transferring and transmitting.   The information distribution system according to claim 6, wherein the distribution adjustment processing unit selects data having a size corresponding to a predetermined communication device as data to be transmitted to the predetermined communication device. Information distribution characterized in that 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. Method.

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