WO2012085973A1 - Système de distribution de carte, serveur de distribution de carte et terminal d'affichage de carte - Google Patents

Système de distribution de carte, serveur de distribution de carte et terminal d'affichage de carte Download PDF

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Publication number
WO2012085973A1
WO2012085973A1 PCT/JP2010/007441 JP2010007441W WO2012085973A1 WO 2012085973 A1 WO2012085973 A1 WO 2012085973A1 JP 2010007441 W JP2010007441 W JP 2010007441W WO 2012085973 A1 WO2012085973 A1 WO 2012085973A1
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WO
WIPO (PCT)
Prior art keywords
map
information
travel
map information
display terminal
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Application number
PCT/JP2010/007441
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English (en)
Japanese (ja)
Inventor
福田　和真
Original Assignee
三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2010/007441 priority Critical patent/WO2012085973A1/fr
Publication of WO2012085973A1 publication Critical patent/WO2012085973A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
    • G01C21/3885—Transmission of map data to client devices; Reception of map data by client devices
    • G01C21/3896—Transmission of map data from central databases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/38—Electronic maps specially adapted for navigation; Updating thereof
    • G01C21/3885—Transmission of map data to client devices; Reception of map data by client devices
    • G01C21/3889—Transmission of selected map data, e.g. depending on route

Definitions

  • the present invention relates to a map distribution server that distributes map information, a map display terminal that displays a map according to map information distributed from the map distribution server, and a map distribution system that includes a map distribution server and a map display terminal. is there.
  • Patent Document 1 when a mobile terminal sets a travel route, the travel route is transmitted to the map distribution server, and when the map distribution server receives the travel route from the mobile terminal, the map information of the block including the travel route
  • a map distribution system that sequentially distributes (map information having a size suitable for the screen size of the mobile terminal) to the mobile terminal is disclosed.
  • Patent Documents 2 to 5 below also disclose a map distribution system that distributes map information of a block including the travel route to the mobile terminal when the map distribution server receives the travel route from the mobile terminal.
  • surrounding map information and the like are distributed by road-to-vehicle communication from a roadside base station.
  • patent document 3 not the road-to-vehicle communication but the surrounding map information etc. are delivered from the base station of radio
  • Patent Document 4 when the map distribution server distributes the map information to the mobile terminal, the map information is subdivided in order to make the distribution data amount per time constant. Moreover, in patent document 5, a priority is set according to the classification of map information, and map information with a high priority according to a communication condition etc. is delivered previously.
  • Japanese Patent Laid-Open No. 2002-073621 pages 3 to 6, FIG. 3) JP 2004-020517 A (pages 7-9, FIG. 1) Japanese Unexamined Patent Publication No. 2004-125409 (pages 4-5, FIG. 2) Japanese Patent Application Laid-Open No. 2004-347685 (pages 7 to 8, FIGS. 2 and 4) Japanese Patent Laying-Open No. 2005-010060 (pages 5-6, FIG. 8)
  • the map distribution server can prepare the map information of the block including the travel route in advance and efficiently distribute the map information to the mobile terminal. .
  • the map distribution server cannot distribute appropriate map information to the mobile terminal.
  • the distribution data amount per time is made constant and the map information with high priority is distributed first, the distribution of map information is made more efficient, but the travel route is set. If not, the map distribution server cannot distribute appropriate map information to the mobile terminal.
  • the present invention has been made to solve the above-described problems.
  • a map distribution system and a map distribution server capable of efficiently distributing appropriate map information even when a travel route is not set in advance. The purpose is to obtain. It is another object of the present invention to provide a map display terminal that can receive appropriate map information from a map distribution server and display a map even when a travel route is not set in advance.
  • the map distribution server receives map information recording means for recording the map information, and information for receiving the traveling information of the moving body or the map display changing operation information transmitted from the map display terminal.
  • the driving information accumulated by the information accumulating means from the receiving means, the information accumulating means for accumulating the traveling information or the change operation information received by the information receiving means, and the map information recorded by the map information recording means.
  • map information selection means for selecting map information to be distributed in accordance with the change operation information and map information distribution means for distributing the map information selected by the map information selection means to the map display terminal are provided. .
  • the map distribution server records the map information, the map information recording means, the information receiving means for receiving the traveling information of the moving body or the map display changing operation information transmitted from the map display terminal, The information accumulating means for accumulating the driving information or the changing operation information received by the information receiving means, and the driving information or the changing operation accumulated by the information accumulating means from the map information recorded by the map information recording means. Since the map information selecting means for selecting the map information to be distributed according to the information and the map information distributing means for distributing the map information selected by the map information selecting means to the map display terminal are provided, the map display terminal However, even when a travel route is not set in advance, there is an effect that appropriate map information can be efficiently distributed to the map display terminal.
  • FIG. It is a block diagram which shows the map display terminal 1 by Embodiment 2 of this invention. It is a block diagram which shows the map delivery server 4 by Embodiment 2 of this invention. It is a flowchart which shows a part of processing content of the map display terminal 1 by Embodiment 2 of this invention. It is a flowchart which shows a part of processing content of the map delivery server 4 by Embodiment 2 of this invention.
  • FIG. 1 is a block diagram showing a map distribution system according to Embodiment 1 of the present invention.
  • the map display terminal 1 corresponds to, for example, a car navigation device mounted on a moving body such as an automobile, or a portable information terminal (for example, a mobile phone, a mobile PC, etc.) possessed by a human being as a moving body.
  • a function of receiving map information distributed from the map distribution server 4 via the base station 2 and a map according to the map information
  • the function to display is implemented.
  • the base station 2 corresponds to a roadside base station, a radio base station, etc., and establishes wireless communication with the map display terminal 1 and transfers the travel information of the mobile body transmitted from the map display terminal 1 to the map distribution server 4.
  • the map information distributed from the map distribution server 4 is transferred to the base station 2.
  • the network 3 corresponds to a communication line such as the Internet, for example, and the base station 2 and the map distribution server 4 are connected. In the example of FIG. 1, only one base station 2 is connected to the network 3, but actually many base stations 2 are connected to the network 3.
  • the map distribution server 4 has a function of receiving travel information of a moving body transmitted from the map display terminal 1 in which a travel route is not set, a function of selecting map information to be distributed according to the travel information, and map information as a map display terminal.
  • the function to distribute to 1 is implemented.
  • FIG. 2 is a block diagram showing the map display terminal 1 according to Embodiment 1 of the present invention.
  • the wireless communication unit 11 includes, for example, an antenna and a wireless communication device, and establishes wireless communication with the base station 2 and performs a process of transmitting and receiving a modulation signal described later.
  • the GPS receiver 12 performs a process of receiving GPS signals distributed from a plurality of GPS satellites.
  • the travel information acquisition unit 13 is composed of, for example, a semiconductor integrated circuit on which a CPU is mounted or a one-chip microcomputer.
  • the map display terminal 1 is mounted from a GPS signal received by the GPS receiver 12.
  • a process of specifying the current position of the moving body and specifying the moving direction of the moving body from the position and the current position at the previous specification is performed.
  • the travel information acquisition unit 13 is a mobile object that indicates a current position, a moving direction, a current time, and a mobile object ID (unique identification information assigned to the mobile object on which the map display terminal 1 is mounted).
  • a process for periodically outputting the traveling information is implemented.
  • the travel information acquisition unit 13 specifies the current position, the moving direction, and the like from the GPS signal received by the GPS receiver 12, but the measurement result of the gyro sensor mounted on the moving body, etc.
  • the current position and the moving direction may be specified from the above.
  • the GPS receiver 12 and the travel information acquisition unit 13 constitute information acquisition means.
  • the travel information transmission processing unit 14 includes, for example, an encoder and a modulator. Every time the travel information of the mobile object is received from the travel information acquisition unit 13, the travel information of the mobile object is encoded and modulated. A process of transmitting the modulated signal of the encoded data to the map distribution server 4 via the base station 2 via the wireless communication unit 11 is performed.
  • the travel information transmission processing unit 14 encodes the travel information of the moving body is shown, but this is only an example, and it is not always necessary to encode the travel information of the mobile body.
  • the wireless communication unit 11 and the travel information transmission processing unit 14 constitute information transmission means.
  • the map information reception processing unit 15 is composed of, for example, a decoder and a demodulator.
  • the wireless communication unit 11 receives a modulated signal of encoded data distributed from the map distribution server 4 via the base station 2, the code information A process of demodulating the modulation signal of the encoded data and decoding the map information from the encoded data after the demodulation is performed.
  • the wireless communication unit 11 and the map information reception processing unit 15 constitute map information receiving means.
  • the map information management unit 16 is composed of, for example, a storage medium such as a RAM or a hard disk, and performs processing for holding the map information decoded by the map information reception processing unit 15 for a necessary period.
  • the map drawing unit 17 is configured by, for example, a GPU (Graphics Processing Unit) and the like, and the map is displayed on the display 18 according to the map information including the current position of the moving body among the map information held by the map information management unit 16. Perform the drawing process.
  • the display 18 is a display that displays a map, operation details, and the like.
  • the map information management unit 16, the map drawing unit 17, and the display 18 constitute a map display means.
  • the map drawing unit 17 are assumed to be configured by dedicated hardware.
  • the wireless communication unit 11 and the GPS receiver 12 all or part of the program showing the processing contents of the travel information acquisition unit 13, the travel information transmission processing unit 14, the map information reception processing unit 15, the map information management unit 16 and the map drawing unit 17 is stored in the memory of the computer.
  • the CPU of the computer may execute the program.
  • FIG. 4 is a flowchart showing the processing contents of the map display terminal 1 according to the first embodiment of the present invention.
  • FIG. 3 is a block diagram showing the map distribution server 4 according to Embodiment 1 of the present invention.
  • a network I / F unit 31 is an interface device for the network 3.
  • the map information DB 32 is composed of a recording device such as a hard disk, and is a database that records map information.
  • the map information recorded by the map information DB 32 is stored in blocks of a size suitable for the screen size of the map display terminal 1 (for example, blocks of a map range of vertical ⁇ meter ⁇ horizontal ⁇ ⁇ meter). It is assumed that it is divided.
  • the map information DB 32 constitutes map information recording means.
  • the travel information reception processing unit 33 demodulates the modulation signal of the encoded data, and after the demodulation The process which decodes the driving
  • the network I / F unit 31 and the travel information reception processing unit 33 constitute information receiving means.
  • the information accumulation processing unit 34 performs a process of recording the travel information of the mobile body decoded by the travel information reception processing unit 33 as history information in the travel history DB 35.
  • the travel history DB 35 is composed of a recording device such as a hard disk, for example, and is a database that accumulates travel information of moving bodies as history information.
  • the information accumulating unit 34 and the travel history DB 35 constitute information accumulating means.
  • the travel route prediction unit 36 performs a process of predicting the travel route of the moving body on which the map display terminal 1 is mounted based on the travel information accumulated in the travel history DB 35. That is, the travel route prediction unit 36 refers to the travel information accumulated in the travel history DB 35 and compares the past travel counts of the mobile body on one or more routes that can be selected as the travel route of the mobile body. The process of determining the route having the largest number of times of travel as the travel route of the moving object is performed.
  • the map information selection processing unit 37 performs a process of selecting the map information of the block corresponding to the travel route predicted by the travel route prediction unit 36 from the map information of a plurality of blocks recorded by the map information DB 32. .
  • the travel route prediction unit 36 and the map information selection processing unit 37 constitute a map information selection unit.
  • the distribution timing control unit 38 determines the distribution timing of the map information of each block selected by the map information selection processing unit 37 according to the current position of the moving object indicated by the driving information decoded by the driving information reception processing unit 33. Implement the process.
  • the map information distribution processing unit 39 encodes and modulates the map information of the block selected by the map information selection processing unit 37, and encodes the map information in accordance with the distribution timing determined by the distribution timing control unit 38. Is output to the network I / F unit 31 so that the modulation signal of the encoded data is distributed to the map display terminal 1 via the base station 2.
  • the map information distribution processing unit 39 encodes map information is shown, but this is only an example, and map information does not necessarily have to be encoded.
  • the network I / F unit 31, the distribution timing control unit 38, and the map information distribution processing unit 39 constitute a map information distribution unit.
  • the network I / F unit 31, the travel information reception processing unit 33, the information accumulation processing unit 34, the travel route prediction unit 36, the map information selection processing unit 37, and the distribution timing which are components of the map distribution server 4. It is assumed that each of the control unit 38 and the map information distribution processing unit 39 is configured by dedicated hardware (for example, a semiconductor integrated circuit on which a CPU is mounted, or a one-chip microcomputer).
  • FIG. 5 is a flowchart showing the processing contents of the map distribution server 4 according to the first embodiment of the present invention.
  • the map display terminal 1 has a function of searching and setting a travel route to a destination. However, in the first embodiment, it is assumed that the travel route is not searched or set. explain.
  • the GPS receiver 12 of the map display terminal 1 receives GPS signals distributed from a plurality of GPS satellites.
  • the travel information acquisition unit 13 of the map display terminal 1 includes the GPS included in the plurality of GPS signals.
  • satellite orbit information for example, the latitude, longitude, altitude, etc. at which the GPS satellite is currently located
  • the current position of the mobile object equipped with the map display terminal 1 is specified in the manner of triangulation.
  • the travel information acquisition unit 13 compares the current position of the moving body with the position of the moving body at the time of previous identification, and specifies the moving direction of the moving body (step ST3).
  • the traveling information acquisition unit 13 When the traveling information acquisition unit 13 specifies the current position and the moving direction of the moving object, the traveling information acquisition unit 13 is assigned to the moving object on which the map display terminal 1 is mounted.
  • the traveling information of the moving body indicating the unique identification information) is output to the traveling information transmission processing unit 14.
  • the travel information acquisition unit 13 periodically outputs the travel information of the mobile body to the travel information transmission processing unit 14, but when specifying the current position of the mobile body on which the map display terminal 1 is mounted, You may make it identify a present position, a moving direction, etc. from the measurement result etc. of the gyro sensor mounted in the mobile body, without using a signal. Moreover, you may make it identify the present position etc. of a mobile body from the positional information on the base station 2 with which the wireless communication part 11 and the wireless communication are established.
  • the travel information transmission processing unit 14 of the map display terminal 1 receives the travel information of the mobile body from the travel information acquisition unit 13, the travel information of the mobile body is encoded and modulated, and the modulated signal of the encoded data is wirelessly transmitted. It outputs to the communication part 11 (step ST4).
  • the travel information transmission processing unit 14 encodes the travel information of the mobile object, but this is only an example, and the travel information of the mobile object may be modulated without encoding. Good.
  • the radio communication unit 11 of the map display terminal 1 receives the modulation signal of the encoded data from the travel information transmission processing unit 14, the radio communication unit 11 transmits the modulation signal of the encoded data to the map distribution server 4 via the base station 2 (Step S1). ST5).
  • the network I / F unit 31 of the map distribution server 4 receives the modulated signal of the encoded data (step ST21 in FIG. 5).
  • the travel information reception processing unit 33 of the map distribution server 4 demodulates and demodulates the modulation signal of the encoded data.
  • the travel information of the moving body is decoded from the later encoded data (step ST22).
  • the travel information transmission processing unit 14 of the map display terminal 1 does not encode the travel information of the moving body
  • the travel information reception processing unit 33 does not perform the decoding process.
  • the information accumulation processing unit 34 of the map distribution server 4 records the travel information as travel history information in the travel history DB 35 (step ST23).
  • the information accumulation processing unit 34 refers to the traveling body ID included in the traveling information to distinguish the traveling information from the traveling information of other moving bodies. Record by moving object.
  • the travel route prediction unit 36 of the map distribution server 4 obtains travel information of the mobile body equipped with the map display terminal 1 from the travel information accumulated in the travel history DB 35, and based on the travel information.
  • the travel route of the moving body is predicted (step ST24).
  • the travel route prediction unit 36 refers to the latest travel information of the mobile body on which the map display terminal 1 is mounted, and recognizes the current position and the travel direction of the mobile body, thereby Identify one or more routes that can be selected as For example, as shown in FIG. 6, when a vehicle that is a moving object is moving in the left direction in the figure in front of the point A, taking the point A as an example, the point A is a crossroad.
  • the route that can be selected as the travel route is the route in the straight direction (left direction in the drawing), the route in the left turn direction (down direction in the drawing), and the route in the right turn direction (upward direction in the drawing).
  • the route in the left turn direction (downward in the figure) can be selected as the travel route of the moving body. Excluded from the route.
  • the travel route prediction unit 36 when the travel route prediction unit 36 identifies a route that can be selected as the travel route of the moving object at the point A, the travel route prediction unit 36 refers to past travel information accumulated in the travel history DB 35 and can select three routes.
  • the past number of travels of the mobile body in the (straight-ahead direction route, left-turn direction route, right-turn direction route) is compared, and the route with the largest past travel number is determined as the travel route of the mobile body. For example, assuming that the number of times of traveling in the straight direction route is 2, the number of times of traveling in the left turn direction is 1, and the right turn direction is 5 times, the route in the right turn direction is predicted as the traveling route of the moving body. To do.
  • a route in a predetermined direction (for example, a straight direction) Route) may be predicted.
  • one route is a main road while the other route is a road with a narrow road width and a small amount of traffic, if the number of times of travel is the same, the travel route of the moving body is preferentially
  • the route of the main road may be predicted. However, this is only an example. For example, a route in a direction toward a famous sightseeing spot or landmark may be predicted.
  • the travel route of the moving body is predicted for each point where the road branches (points B to N) in order from point A, and the route indicated by the dotted line is the prediction result.
  • the travel route prediction unit 36 predicts the travel route of the mobile object, the travel times of one or more routes that can be selected as the travel route of the mobile object are compared.
  • the route represented by the darkest line can also be predicted as a travel line.
  • the travel route prediction unit 36 predicts the travel route of the mobile object equipped with the map display terminal 1 as described above, but has already predicted the travel route of the mobile object, and the mobile object is the predicted route. In a situation where the vehicle travels to the middle of the vehicle (for example, travels to the vicinity of the point C), the travel route prediction process for the mobile body is not performed. However, if the mobile body has already traveled to the vicinity of the final point of prediction (for example, N point), the travel route of the mobile body is newly predicted. Further, when the current position indicated by the latest travel information of the moving body is not on the previously predicted travel route, the travel route of the mobile body is predicted again. As a prediction method of the travel route, a prediction method similar to the prediction method performed first may be used, or another prediction method may be used.
  • the map information selection processing unit 37 of the map distribution server 4 selects a travel route prediction unit from the map information of a plurality of blocks recorded by the map information DB 32.
  • the map information of the block corresponding to the travel route predicted by 36 is selected (step ST25).
  • the map distribution server 4 distributes the map information along the travel route predicted by the travel route prediction unit 36
  • the travel route predicted by the travel route prediction unit 36 is the map drawn on the map display terminal 1. In order to display the image so as to be centered, it is necessary to distribute not only the map information of the block including the travel route but also the map information of the blocks around the block (blocks not including the travel route).
  • FIG. 8 is an explanatory diagram showing an example of the map information selected by the map information selection processing unit 37.
  • the map information of blocks (5) and (8) that do not include the travel route is also selected.
  • the distribution timing control unit 38 of the map distribution server 4 indicates the current position of the moving object indicated by the travel information decoded by the travel information reception processing unit 33. Accordingly, the distribution timing of the map information of each block is determined (step ST26). That is, for example, when the travel route is predicted by the travel route prediction unit 36 when the moving object exists in the block (1) shown in FIG. 8, the distribution timing control unit 38 blocks (1) and (2). The distribution timing for immediately distributing the map information is determined, but the distribution timing of the map information in the blocks (3) to (10) is determined as follows.
  • the map information of the block (3) monitors the latest traveling information of the moving body, and the current position of the moving body indicated by the traveling information moves to the center of the previously distributed block (1).
  • the distribution timing is the timing when the current position of the moving body indicated by the latest traveling information of the moving body moves to the center of the block (2) that has been distributed previously.
  • the map information of the block (5) is determined as the distribution timing when the current position of the moving body indicated by the latest traveling information of the moving body has moved to the center of the block (3) distributed previously. . That is, the distribution timing control unit 38 distributes the map information of the block two blocks ahead of the block at the timing when the moving body moves to the center of the block related to the map currently displayed on the map display terminal 1. Determine the delivery timing.
  • the map information distribution processing unit 39 of the map distribution server 4 encodes and modulates the map information of each block selected by the map information selection processing unit 37, and when the distribution timing determined by the distribution timing control unit 38 comes (step). (ST27) By outputting the modulation signal of the encoded data of the block to the network I / F unit 31, the modulation signal of the encoded data is distributed to the map display terminal 1 via the base station 2 (step ST28).
  • the modulation signal of the map information encoded data of the blocks (1) and (2) is immediately distributed, and the modulation signal of the map information encoded data of the blocks (3) to (10) Is delivered when it moves to the center of the blocks (1) to (8).
  • map information distribution processing unit 39 encodes map information
  • map information may be distributed without encoding.
  • the processes of steps ST21 to ST28 in the map distribution server 4 are repeatedly performed until the map information distribution process is completed (step ST29).
  • the wireless communication unit 11 of the map display terminal 1 receives the modulation signal of the encoded data (step ST6 in FIG. 4).
  • the map information reception processing unit 15 of the map display terminal 1 demodulates the modulation signal of the encoded data when the wireless communication unit 11 receives the modulation signal of the encoded data, and decodes the map information from the encoded data after demodulation. (Step ST7).
  • the map information reception processing unit 15 does not perform the decoding process.
  • the map information management unit 16 of the map display terminal 1 holds the map information of each block decoded by the map information reception processing unit 15 for a necessary period. For example, the map information of the block (1) is held until the moving body moves within the range of the block (3), and the map information of the block (2) moves within the range of the block (4). Hold up.
  • the map drawing unit 17 of the map display terminal 1 collects the travel information of the mobile body from the travel information acquisition unit 13, and from the map information held by the map information management unit 16, the mobile body indicated by the travel information. Map information of the block including the current position is acquired, and a map is drawn on the display 18 according to the map information (step ST8). However, when drawing the map, the map drawing unit 17 displays the symbol of the moving body at the current position on the map and displays the current position of the moving body at the center of the screen. Unless it exists in the center of a block, a map cannot be drawn on the whole display 18 only by the map information of the block including the current position of the moving body.
  • the moving object moves from the block (1) to within the range of the block (2), so the current position of the moving object is at the center of the screen.
  • the map display is such that the right half of the display 18 is missing only with the map information of the block (2). Therefore, since the map is also displayed on the right half of the display 18, the map information of the block (1) is also acquired, and the map is drawn on the display 18 according to the map information of the blocks (1) and (2).
  • the processes of steps ST1 to ST8 in the map display terminal 1 are repeatedly performed until the map display process is completed (step ST9).
  • the map distribution server 4 includes the map information DB 32 in which the map information is recorded and the mobile body transmitted from the map display terminal 1 in which the travel route is not set.
  • the travel information reception processing unit 33 for receiving the travel information
  • the information accumulation processing unit 34 for accumulating the travel information received by the travel information reception processing unit 33 in the travel history DB 35
  • the travel information accumulated by the travel history DB 35 The map information corresponding to the travel route predicted by the travel route prediction unit 36 is selected from the travel route prediction unit 36 that predicts the travel route of the mobile body and the map information recorded by the map information DB 32.
  • a map information selection processing unit 37 and a map information distribution processing unit 39 that distributes the map information selected by the map information selection processing unit 37 to the map display terminal 1 are provided. Since it is configured to, achieve in the map display terminal 1, even if the advance travel route is not set, the correct map information efficiently an advantage of being able to distribute to the map display terminal 1.
  • the travel route prediction unit 36 when the current position of the moving body indicated by the latest travel information received by the travel information reception processing unit 33 is not on the previously predicted travel route, the travel route prediction unit 36 The travel route of the moving object is re-predicted according to the travel information accumulated in the travel history DB 35, and the map information selection processing unit 37 selects the travel route prediction unit 36 from the map information recorded by the map information DB 32. Since the map information corresponding to the re-predicted travel route is re-selected, even when the mobile body does not travel according to the first prediction result, there is an effect that appropriate map information can be selected.
  • the distribution timing control unit 38 distributes the map information of each block selected by the map information selection processing unit 37 according to the current position of the moving object indicated by the traveling information of the moving object. Since the timing is determined and the map information distribution processing unit 39 is configured to distribute the map information of each block to the map display terminal 1 in accordance with the distribution timing, the map necessary for the map display terminal 11 to draw the map Information can be acquired at an appropriate timing. As a result, it is possible to speed up the map display, and it is not necessary to hold more map information than necessary, and the memory capacity can be reduced. There is an effect.
  • the map information selection processing unit 37 has a plurality of blocks ahead on the travel route predicted by the travel route prediction unit 36 from the map block currently displayed on the map display terminal 1. Since the information is selected in advance and the map information distribution processing unit 39 is configured to distribute the map information of the block selected in advance by the map information selection processing unit 37 to the map display terminal 1, the map display terminal The map information required when 1 draws the map is already acquired, and the map can be displayed quickly.
  • the travel route prediction unit 36 when the travel route prediction unit 36 predicts the travel route of the mobile object, it can be selected as the travel route of the mobile object with reference to the travel information accumulated in the travel history DB 35. Since it is configured to compare the number of past travels of the mobile body on one or more routes and determine the route with the largest number of past travels as the travel route of the mobile body, the route that is likely to travel statistically It is possible to predict as a travel route of the moving body.
  • the travel information acquisition unit 13 of the map display terminal 1 specifies the current position and moving direction of the moving object, and the current position, moving direction, current time, moving object ID, and the like of the moving object.
  • the traveling information of the moving body is output periodically.
  • the traveling speed of the moving body is specified (the traveling speed is the current position of the moving body, Calculate the distance from the position of the moving object at the previous identification, and divide the distance by the time difference (difference between the current time and the time at the previous identification), the current position of the moving object
  • the traveling information of the moving object indicating the moving direction, the moving speed, the current time, and the moving object ID may be periodically output.
  • the travel route prediction unit 36 of the map distribution server 4 can predict the travel route of the mobile object in consideration of the travel speed of the mobile object, and the distribution timing control unit 38 determines the travel speed of the mobile object. Considering this, the distribution timing of the map information can be determined.
  • the travel route predicting unit 36 predicts the travel route of the mobile object
  • the travel information accumulated in the travel history DB 35 is referred to and one or more selectable as the travel route of the mobile object.
  • a comparison is made between the number of past travels of the mobile body on the route and the route with the largest number of past travels is determined as the travel route of the mobile body.
  • the travel route prediction unit 36 is equipped with the map display terminal 1.
  • prediction target mobile body Other mobile bodies on one or more routes that can be selected as the travel route of the prediction target mobile body with reference to the travel information of the other mobile body different from the mobile body.
  • the past travel counts may be compared, and the route with the largest past travel count may be determined as the travel route of the prediction target mobile body. For example, when the number of past travels of the prediction target mobile body in one or more routes that can be selected as the travel path of the prediction target mobile body is all 0 times, a route in a predetermined direction (for example, a straight travel direction route), etc. However, it is highly likely that the target mobile unit will also travel, so the route with the highest number of past travels of other mobile units is the target of prediction. If the travel route of the mobile body is determined, a route with high possibility of travel can be predicted as the travel route of the prediction target mobile body.
  • the travel route prediction unit 36 narrows down the travel route of the mobile body to one route, but as described above, the map information distributed by the map information distribution processing unit 39 is Since the map information is in units of blocks (see FIG. 8), the predicted route may not strictly limit the road. That is, it is possible to deal with a plurality of routes passing through a certain block, and thus it is not always necessary to narrow the predicted route to one.
  • Embodiment 2 the map display terminal 1 transmits the travel information of the mobile body to the map distribution server 4, and the map distribution server 4 predicts the travel path of the mobile body according to the travel information transmitted from the map display terminal 1. Then, the map information corresponding to the travel route is selected and distributed to the map display terminal 1, but the map display terminal 1 distributes the change operation information indicating the scroll operation for moving the display range of the map.
  • the map distribution server 4 predicts the display range of the map after the scroll operation according to the change operation information transmitted from the map display terminal 1 and transmits the map information corresponding to the display range of the map after the scroll operation. You may make it select and deliver to the map display terminal 1.
  • FIG. In the second embodiment an example in which map information is efficiently distributed before the map display terminal 1 starts drawing a map will be described.
  • FIG. 9 is a block diagram showing a map display terminal 1 according to Embodiment 2 of the present invention.
  • the man-machine I / F unit 21 is a man-machine interface such as a touch panel, a remote controller, a keyboard, and a mouse, for example.
  • the man-machine I / F unit 21 performs a process of accepting a scroll operation for moving the display range of the map displayed on the display 18.
  • the change operation information output unit 22 is composed of, for example, a semiconductor integrated circuit on which a CPU is mounted, a one-chip microcomputer, or the like, and a map display change operation indicating a scroll operation received by the man-machine I / F unit 21.
  • a process of outputting information to the travel information / change operation information transmission processing unit 23 is performed.
  • the man-machine I / F unit 21 and the change operation information output unit 22 constitute information acquisition means.
  • the travel information / change operation information transmission processing unit 23 includes, for example, an encoder, a modulator, and the like. Like the travel information transmission processing unit 14 in FIG. Each time it is received, the travel information of the mobile body is encoded and modulated, and a process of transmitting a modulation signal of the encoded data to the map distribution server 4 via the base station 2 via the wireless communication unit 11 is performed. Further, when the map operation change operation information is received from the change operation information output unit 22, the change operation information is encoded and modulated, and the modulation signal of the encoded data is transmitted via the base station 2 via the wireless communication unit 11. The process which transmits to the map delivery server 4 is implemented.
  • the wireless communication unit 11 and the travel information / change operation information transmission processing unit 23 constitute information transmission means.
  • the wireless communication unit 11, the GPS receiver 12, the travel information acquisition unit 13, the man-machine I / F unit 21, the change operation information output unit 22, the travel information / change which are components of the map display terminal 1.
  • the wireless communication unit 11, the GPS receiver 12, the travel information acquisition unit 13, the man-machine I / F unit 21, the change operation information output unit 22, the travel information / change operation information transmission process All or part of the program indicating the processing contents of the unit 23, the map information reception processing unit 15, the map information management unit 16 and the map drawing unit 17 is stored in the memory of the computer. There may be executed the program.
  • FIG. 11 is a flowchart showing a part of the processing contents of the map display terminal 1 according to the second embodiment of the present invention.
  • FIG. 10 is a block diagram showing a map distribution server 4 according to Embodiment 2 of the present invention.
  • the same reference numerals as those in FIG. the same reference numerals as those in FIG.
  • the travel information / change operation information reception processing unit 41 demodulates the modulation signal of the encoded data. And the process which decodes the driving
  • the network I / F unit 31 and the travel information / change operation information reception processing unit 41 constitute information reception means.
  • the information accumulation processing unit 42 performs a process of recording the travel information of the moving body or the change operation information of the map display decoded by the travel information / change operation information reception processing unit 41 in the travel operation history DB 43 as history information.
  • the travel operation history DB 43 is composed of a recording device such as a hard disk, for example, and is a database that accumulates travel information of a moving object or change operation information of map display as history information.
  • the information accumulation processing unit 42 and the travel operation history DB 43 constitute information accumulation means.
  • the display range prediction unit 44 performs processing for predicting the display range of the map after the scroll operation based on the change operation information accumulated in the travel operation history DB 43. That is, the display range prediction unit 44 performs processing for predicting the display range of the map after the scroll operation by referring to the change operation information accumulated in the travel operation history DB 43 and predicting the duration of the scroll operation. To do.
  • the map information selection processing unit 45 uses the map information or the display range prediction unit 44 of the block corresponding to the travel route predicted by the travel route prediction unit 36 from the map information of a plurality of blocks recorded by the map information DB 32. A process of selecting the map information of the block corresponding to the predicted display range is performed.
  • the travel route prediction unit 36, the display range prediction unit 44, and the map information selection processing unit 45 constitute a map information selection unit.
  • the distribution timing control unit 46 is selected by the map information selection processing unit 45 according to the current position of the moving object indicated by the travel information decoded by the travel information / change operation information reception processing unit 41, the scroll speed in the map display terminal 1, and the like. The processing for determining the distribution timing of the map information of each block is performed.
  • the network I / F unit 31, the distribution timing control unit 46, and the map information distribution processing unit 39 constitute a map information distribution unit.
  • the network I / F unit 31 the travel information / change operation information reception processing unit 41, the information accumulation processing unit 42, the travel route prediction unit 36, and the display range prediction unit 44 that are components of the map distribution server 4.
  • Each of the map information selection processing unit 45, the distribution timing control unit 46, and the map information distribution processing unit 39 is configured by dedicated hardware (for example, a semiconductor integrated circuit on which a CPU is mounted, or a one-chip microcomputer).
  • FIG. 12 is a flowchart showing a part of the processing contents of the map distribution server 4 according to the second embodiment of the present invention.
  • the map display terminal 1 transmits the travel information of the moving body to the map distribution server 4 and the map distribution server 4 transmits from the map display terminal 1 as in the first embodiment.
  • the map display terminal 1 displays a map in addition to the function A for predicting the travel route of the mobile body according to the travel information and selecting the map information corresponding to the travel route and delivering it to the map display terminal 1.
  • the change operation information indicating the scroll operation for moving the range is transmitted to the map distribution server 4, and the map distribution server 4 predicts the display range of the map after the scroll operation according to the change operation information transmitted from the map display terminal 1, It has the function B which selects the map information corresponding to the display range of the map after scroll operation, and distributes to the map display terminal 1. Since the processing contents of the function A are the same as those in the first embodiment, the description thereof will be omitted. Here, the processing contents of the function B will be described. Also in the second embodiment, the description will be made assuming that the travel route is not searched or set.
  • the man-machine I / F unit 21 When the user who is viewing the map displayed on the display 18 of the map display terminal 1 wishes to move the display range of the map, the man-machine I / F unit 21 is used to perform a scroll operation.
  • the change operation information output unit 22 of the map display terminal 1 receives the scroll operation start time and the scroll direction (for example, the right direction, Left direction, upward direction, downward direction, etc.), and a map display change operation indicating the operation start time of the scroll operation, the scroll direction, and the map display terminal ID (unique identification information assigned to the map display terminal 1)
  • the information is output to the travel information / change operation information transmission processing unit 23 (step ST32).
  • the running information / changing operation information transmission processing unit 23 encodes and modulates the changing operation information, and wirelessly communicates the modulation signal of the encoded data. It outputs to the part 11 (step ST33).
  • the travel information / change operation information transmission processing unit 23 encodes the map display change operation information, but this is only an example, and the map display change operation information is not encoded. You may make it modulate.
  • the radio communication unit 11 of the map display terminal 1 receives the modulation signal of the encoded data from the travel information / change operation information transmission processing unit 23, the radio communication unit 11 transmits the modulation signal of the encoded data to the map distribution server 4 via the base station 2. Transmit (step ST34).
  • the network I / F unit 31 of the map distribution server 4 receives the modulated signal of the encoded data (step ST41 in FIG. 12).
  • the network I / F unit 31 receives the modulation signal of the encoded data transmitted from the map display terminal 1
  • the travel information / change operation information reception processing unit 41 of the map distribution server 4 receives the modulation signal of the encoded data. Demodulating and decoding map display change operation information from the demodulated encoded data (step ST42).
  • the travel information / change operation information transmission processing unit 23 of the map display terminal 1 does not encode the map display change operation information
  • the travel information / change operation information reception processing unit 41 does not perform the decoding process.
  • the information accumulation processing unit 42 of the map distribution server 4 records the change operation information as history information in the travel operation history DB 43 ( Step ST43).
  • the information accumulation processing unit 42 when recording the map display change operation information, distinguishes it from the map display change operation information in the other map display terminals 1, so that the map display terminal ID included in the change operation information The change operation information is recorded for each map display terminal.
  • the display range prediction unit 44 of the map distribution server 4 selects the map after the scroll operation based on the change operation information transmitted from the map display terminal 1 from the change operation information accumulated in the travel operation history DB 43.
  • a display range is predicted (step ST44).
  • the display range prediction processing in the display range prediction unit 44 will be specifically described.
  • the display range prediction unit 44 refers to the change operation information decoded by the travel information / change operation information reception processing unit 41, specifies the operation start time and scroll direction of the scroll operation, and specifies the map display terminal ID. .
  • the display range prediction unit 44 includes the specified map display terminal ID from the past change operation information accumulated in the travel operation history DB 43 and scrolls in the same direction as the specified scroll direction.
  • the average value, median value, or mode value of the duration of the past scroll operation is obtained, and the average value, median value Alternatively, the mode value is determined as the duration of the scroll operation.
  • a is a predetermined proportionality constant.
  • the predicted number N of scrolls is calculated by simply multiplying the proportional constant a by the duration T of the past scroll operation, but the scroll speed V of the scroll operation is included in the map display change operation information. Is included, the predicted number of scrolls N proportional to the scroll speed V may be calculated.
  • the display range prediction unit 44 calculates the map N blocks ahead of the block currently displayed on the display 18.
  • the display range is predicted to be the display range of the map after the scroll operation.
  • the display range of the map after the scroll operation is the block (10). It is predicted that this is the display range of the map.
  • the display range prediction unit 44 predicts the display range of the map after the scroll operation as described above, but has already predicted the display range of the map, and the scroll of the map proceeds to the middle of the predicted display range. In such a situation, the map display range is not predicted. However, if the scroll operation continues even if the map scrolls to the predicted display range, the display range of the map after the scroll operation is predicted again.
  • the prediction method of the display range of the map a prediction method similar to the prediction method performed first may be used, or another prediction method may be used.
  • the map information selection processing unit 45 of the map distribution server 4 displays the map information from a plurality of blocks recorded by the map information DB 32.
  • the distribution timing control unit 46 of the map distribution server 4 includes a plurality of blocks from the block relating to the map currently displayed on the display 18 of the map display terminal 1.
  • the map display terminal 1 Based on the scroll speed (a fixed scroll speed set in advance in the map distribution server 4 or a scroll speed included in the change operation information), the distribution timing of the map information of a plurality of blocks is determined (step) ST46).
  • the scroll speed of the map display terminal 1 is three stages (high speed, medium speed, low speed)
  • the scroll speed is high
  • the map starting point of the drawing of a new block is indicated by the map three blocks ahead.
  • the time point when the drawing of the map of the new block is started is determined as the distribution timing of the map information two blocks ahead.
  • the point in time when the drawing of the map of the new block is started is determined as the distribution timing of the map information one block ahead.
  • this distribution timing is only an example, and for example, a time point when the center of a new block is displayed at the center of the screen may be determined as the distribution timing.
  • the map information distribution processing unit 39 of the map distribution server 4 encodes and modulates the map information of each block selected by the map information selection processing unit 45, and when the distribution timing determined by the distribution timing control unit 46 comes (step). (ST47) By outputting the modulation signal of the encoded data of the block to the network I / F unit 31, the modulation signal of the encoded data is distributed to the map display terminal 1 via the base station 2 (step ST48). For example, when the map of the block (2) in FIG.
  • the map information selection processing unit 45 selects the map information of the blocks (3), (4), and (6), and the distribution timing control unit 46 If the time when the drawing of the map of the new block is started is determined as the distribution timing of the map information two blocks ahead, the modulation signal of the encoded data of the map information of the blocks (3) and (4) is immediately distributed. Then, the modulation signal of the encoded data of the map information of the block (6) is distributed at the timing when the drawing of the map of the block (3) is started.
  • step ST49 an example in which the map information distribution processing unit 39 encodes map information is shown, but this is only an example, and map information may be distributed without encoding.
  • the processes of steps ST41 to ST48 in the map distribution server 4 are repeatedly performed until the map information distribution process is completed (step ST49).
  • the wireless communication unit 11 of the map display terminal 1 receives the modulation signal of the encoded data (step ST35 in FIG. 11).
  • the map information reception processing unit 15 of the map display terminal 1 demodulates the modulation signal of the encoded data when the wireless communication unit 11 receives the modulation signal of the encoded data, and decodes the map information from the encoded data after demodulation. (Step ST36).
  • the map information reception processing unit 15 does not perform the decoding process.
  • the map information management unit 16 of the map display terminal 1 holds the map information of each block decoded by the map information reception processing unit 15 for a necessary period. For example, the map information distributed with the scroll operation is held until the scroll operation is finished and the display of the map indicating the original current position is returned. However, when the map information management unit 16 has a sufficient memory capacity, the map information may be retained without being discarded in order to prepare for the next scroll operation.
  • the map drawing unit 17 of the map display terminal 1 collects travel information of the moving body from the travel information acquisition unit 13 as in the first embodiment, unless a scroll operation is received by the man-machine I / F unit 21. Then, the map information of the block including the current position of the moving object indicated by the travel information is acquired from the map information held by the map information management unit 16, and the map is drawn on the display 18 according to the map information. However, when a scroll operation is accepted by the man-machine I / F unit 21 as described above, the map information of the block corresponding to the scroll direction is acquired from the map information held by the map information management unit 16. Then, a map is drawn on the display 18 according to the map information (step ST37). The processes of steps ST31 to ST37 in the map display terminal 1 are repeatedly performed until the map display process is completed (step ST38).
  • the change operation information output unit 22 of the map display terminal 1 travels the map display change operation information (end) indicating the operation end time of the scroll operation, the scroll direction, and the map display terminal ID.
  • the information / change operation information transmission processing unit 23 outputs the information / change operation information.
  • the travel operation / change operation information transmission processing unit 23 receives the change operation information (end) of the map display from the change operation information output unit 22, the run information / change operation information transmission processing unit 23 encodes and modulates the change operation information (end). The modulated signal is output to the wireless communication unit 11.
  • the travel information / change operation information transmission processing unit 23 encodes the map display change operation information (end), but this is only an example, and the map display change operation information (end). May be modulated without encoding.
  • the radio communication unit 11 of the map display terminal 1 receives the modulation signal of the encoded data from the travel information / change operation information transmission processing unit 23, the radio communication unit 11 transmits the modulation signal of the encoded data to the map distribution server 4 via the base station 2. Send.
  • the network I / F unit 31 of the map distribution server 4 receives the modulation signal of the encoded data.
  • the network I / F unit 31 receives the modulation signal of the encoded data transmitted from the map display terminal 1
  • the travel information / change operation information reception processing unit 41 of the map distribution server 4 receives the modulation signal of the encoded data. Demodulate and decode map display change operation information (end) from the demodulated encoded data.
  • the travel information / change operation information transmission processing unit 23 of the map display terminal 1 does not encode the map display change operation information
  • the travel information / change operation information reception processing unit 41 does not perform the decoding process.
  • the information accumulation processing unit 42 of the map distribution server 4 uses the change operation information (end) as history information. Record in the history DB 43 (step ST43). However, the information accumulating processing unit 42 includes the change operation information (end) in order to distinguish it from the change operation information (end) of the map display in the other map display terminals 1 when recording the change operation information of the map display. With reference to the displayed map display terminal ID, the change operation information (end) is recorded for each map display terminal.
  • the map information distribution processing unit 39 of the map distribution server 4 has the change operation information (end) as history information even if the map information selected by the map information selection processing unit 45 includes map information of undistributed blocks. When the travel operation history DB 43 is recorded, the distribution of the map information is terminated.
  • the map distribution server 4 displays the map information DB 32 in which the map information is recorded and the map display transmitted from the map display terminal 1 in which the travel route is not set.
  • Traveling information / changing operation information reception processing unit 41 for receiving the changing operation information, and an information accumulating processing unit 42 for accumulating the changing operation information received by the traveling information / changing operation information receiving processing unit 41 in the traveling operation history DB 43;
  • the display range prediction unit 44 that predicts the display range of the map after the scroll operation according to the change operation information accumulated in the travel operation history DB 43, and the display range prediction from the map information recorded by the map information DB 32
  • a map information selection processing unit 45 for selecting map information corresponding to the display range predicted by the unit 44, and a location selected by the map information selection processing unit 45.
  • map information distribution processing unit 39 that distributes information to the map display terminal 1 is provided, appropriate map information corresponding to the scroll operation can be efficiently distributed to the map display terminal 1. As a result, it is possible to promptly display the map moving with the scroll operation on the map display terminal 1.
  • the display range prediction unit 44 refers to the change operation information accumulated in the travel operation history DB 43 and predicts the duration of the scroll operation, so that the map after the scroll operation is displayed.
  • the display range is predicted
  • the map operation distance on the screen of the map display terminal 1 is predicted with reference to the change operation information, so that the display range of the map after the scroll operation is predicted. It may be. That is, if it is known how much the map will move on the screen of the map display terminal 1 in one scroll operation, the map moving distance on the screen of the map display terminal 1 is predicted from the number of scroll operations. If the map movement distance on the screen is known, the display range of the map after the scroll operation can be obtained.
  • the display range prediction unit 44 predicts the display range of the map after the scroll operation at the start of the scroll operation.
  • the scroll operation is not performed (for example, When the scroll operation is performed for each scroll direction (at the end of the scroll operation)
  • the display range of the map is predicted in advance, and the display range that is predicted in advance when the actual scroll operation is performed You may make it deliver the map information of the block corresponding to.
  • the map information can be distributed more quickly.
  • the map display terminal 1 transmits the change operation information indicating the scroll operation for moving the display range of the map to the map distribution server 4.
  • the map display terminal 1 is the scale of the map.
  • the change operation information indicating the scale change operation for changing (enlarging or reducing) may be transmitted to the map distribution server 4.
  • the display range prediction unit 44 of the map distribution server 4 predicts the display range of the map after the scale change based on the change operation information, and the map information selection processing unit 45 is recorded by the map information DB 32. Map information corresponding to the display range predicted by the display range prediction unit 44 is selected from the map information.
  • changing the scale of a map does not move the center of the currently displayed map, but reduces the display range (enlarges the map) or enlarges the display range (reduces the map), and the map center moves. This is different from the scrolling operation, but is common to the scrolling operation in that it is an operation for changing the display range of the currently displayed map. For this reason, even if the change operation information is information indicating a map scale change operation, the display range prediction unit 44 can predict the display range of the map as in the case of information indicating a scroll operation.
  • the present invention is suitable for a map distribution system or a map distribution server that needs to efficiently distribute appropriate map information to a map display terminal even when a travel route is not set in advance on the map display terminal.

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  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
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  • General Physics & Mathematics (AREA)
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Abstract

L'invention concerne un serveur de distribution de carte (4) comprenant : un processeur (33) de réception d'informations de déplacement recevant des informations de déplacement relatives à un corps en déplacement, les informations de déplacement étant transmises à partir d'un terminal (1) d'affichage de carte ; un processeur (34) de stockage d'informations stockant dans une base de données (35) d'historique de déplacement les informations de déplacement reçues par le processeur (33) de réception d'informations de déplacement ; une unité (36) de prédiction d'itinéraire prédisant un itinéraire du corps en déplacement en fonction des informations de déplacement stockées dans la base de données (35) d'historique de déplacement ; et un processeur (37) de sélection d'informations cartographiques sélectionnant, parmi des informations cartographiques enregistrées dans une base de données (32) d'informations cartographiques, des informations cartographiques correspondant à l'itinéraire prédit par l'unité (36) de prédiction d'itinéraire. Un processeur (39) de distribution d'informations cartographiques distribue au terminal (1) d'affichage de carte les informations cartographiques sélectionnées par le processeur (37) de sélection d'informations cartographiques.
PCT/JP2010/007441 2010-12-22 2010-12-22 Système de distribution de carte, serveur de distribution de carte et terminal d'affichage de carte WO2012085973A1 (fr)

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EP3108209A4 (fr) * 2014-02-18 2017-10-25 Scania CV AB Construction de carte dans un véhicule

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EP3108209A4 (fr) * 2014-02-18 2017-10-25 Scania CV AB Construction de carte dans un véhicule

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