WO2010119948A1 - Dispositif de tabulation d'informations de position et procédé de tabulation d'informations de position - Google Patents

Dispositif de tabulation d'informations de position et procédé de tabulation d'informations de position Download PDF

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Publication number
WO2010119948A1
WO2010119948A1 PCT/JP2010/056839 JP2010056839W WO2010119948A1 WO 2010119948 A1 WO2010119948 A1 WO 2010119948A1 JP 2010056839 W JP2010056839 W JP 2010056839W WO 2010119948 A1 WO2010119948 A1 WO 2010119948A1
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Prior art keywords
position information
mobile communication
information
distribution
communication terminal
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PCT/JP2010/056839
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English (en)
Japanese (ja)
Inventor
基成 小林
博 川上
晩煕 趙
俊博 鈴木
大介 越智
智大 永田
勇輝 大薮
一郎 岡島
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株式会社エヌ・ティ・ティ・ドコモ
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Priority to JP2011509362A priority Critical patent/JP5296196B2/ja
Publication of WO2010119948A1 publication Critical patent/WO2010119948A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information

Definitions

  • the present invention relates to a position information totaling apparatus and a position information totaling method.
  • the device described in Patent Document 1 uses a database that stores location information regarding each mobile terminal to tabulate the population distribution corresponding to the target area and target layer.
  • the apparatus of patent document 2 is disclosing producing
  • An object of the present invention is to provide an information aggregation device and a position information aggregation method.
  • the position information totaling apparatus of the present invention provides the position information calculated by a predetermined positioning calculation method with respect to the positions of a plurality of mobile communication terminals to the user of the mobile communication terminal corresponding to each position information.
  • the location information is received by using the distribution function set by the location information receiving means for receiving including the user identification information to be identified, the location indicated by the location information, and the computation error corresponding to the positioning computation method.
  • Position information conversion means for converting to a probability density distribution indicating the probability of performing, and a counting means for counting the population distribution in the specific area by counting the position information converted by the position information conversion means.
  • the position information totaling method of the present invention is a method in which the position information totaling apparatus calculates the position information calculated by a predetermined positioning calculation method with respect to the positions of a plurality of mobile communication terminals, to the user of the mobile communication terminal corresponding to each position information.
  • a position information receiving step for receiving including user specifying information for specifying the position, and a position information totaling device set by the position indicated by the position information and the calculation error corresponding to the positioning calculation method, respectively.
  • the location information conversion step for converting into a probability density distribution indicating the probability of the presence of the mobile communication terminal using the function, and the location information totaling device counts the location information converted by the location information conversion means, so that the specific area And tally step of tallying population distribution.
  • position information related to the mobile communication terminal is received including the user specifying information, and an error corresponding to the positioning calculation method is set based on the position indicated by the position information.
  • the position information is converted into a probability density distribution, and the population distribution is tabulated by tabulating the converted probability density distribution.
  • each piece of position information is tabulated in a distribution corresponding to the error, so that even when position information obtained by various positioning calculation methods is targeted, a highly accurate population distribution can be obtained.
  • the position information converting means sets the position indicated by the position information and the calculation error corresponding to the positioning calculation method in the distribution function selected from the predetermined formula, thereby the probability indicating the probability that the mobile communication terminal exists. It is preferable to convert to a density distribution. In the position information conversion step, the position indicated by the position information and the calculation error corresponding to the positioning calculation method are set in the distribution function selected from the predetermined formula, so that the probability that the mobile communication terminal exists is calculated. It is also preferable to convert to the probability density distribution shown.
  • the position information conversion means sets a distribution function in accordance with the positioning calculation method. In this case, since the position information is aggregated with a distribution corresponding to the positioning calculation method, even more accurate population distribution can be obtained even when the position information obtained by various positioning calculation methods is targeted.
  • the position information conversion means sets the distribution function based on information specifying the probability density distribution included in the position information. In this case, since the position information is aggregated in a distribution corresponding to each position information, even more accurate population distribution can be obtained even when position information having various probability density distributions is targeted.
  • the position information conversion means uses a normal distribution function in which the calculation error is set to the standard deviation. In this way, the probability density regarding the presence of the mobile communication terminal is appropriately set, and the population distribution can be aggregated more accurately.
  • the position information conversion means is a distribution function that has a normal distribution in the radial direction centered on the radio base station and a uniform distribution in the angular direction. It is also preferable to use With this configuration, when a distance from a radio base station is predicted by positioning using the radio base station, a probability density distribution related to the mobile communication terminal can be appropriately set based on the distance. As a result, population distribution can be tabulated more accurately.
  • the location information conversion means uses a distribution function that provides a uniform distribution in the area where the mobile communication terminal is located.
  • the probability density distribution regarding the mobile communication terminal can be appropriately set based on the area. As a result, population distribution can be tabulated more accurately.
  • the counting means divides the specific area into a plurality of meshes and integrates the distribution function for each of the plurality of meshes. In this case, the population distribution for each mesh can be obtained more accurately.
  • the counting means divides the specific area into a plurality of meshes, and sums the distribution function values at the center point of the meshes for each of the plurality of meshes. In this way, even if the number of meshes to be counted and the number of position information are increased, the amount of calculation can be suppressed and the processing time can be shortened.
  • FIG. 1 is a schematic configuration diagram of a position information aggregation system according to a preferred embodiment of the present invention. It is a figure which shows the structure of the request signal of the location information service transmitted by the mobile communication terminal of FIG. It is a figure which shows the image of the positioning calculation by the positional information calculation apparatus 4 of FIG. It is a figure which shows the image of the positioning calculation by the positional information calculation apparatus 4 of FIG. It is a figure which shows the image of the positioning calculation by the positional information calculation apparatus 4 of FIG. It is a figure which shows the image of the positioning calculation by the positional information calculation apparatus 4 of FIG. It is a figure which shows the image of the positioning calculation by the positional information calculation apparatus 4 of FIG. It is a figure which shows the image of the positioning calculation by the positional information calculation apparatus 4 of FIG. It is a figure which shows the image of the positioning calculation by the positional information calculation apparatus 4 of FIG.
  • FIG. 1 is a schematic configuration diagram of a position information totaling system 1 according to a preferred embodiment of the present invention.
  • the location information totaling system 1 includes a plurality of mobile communication terminals 2, a radio base station 3, a location information calculation device 4, a location information providing device 5, an information display device 6, and location information.
  • a storage device 11 and a position information processing device 12 are provided.
  • the location information storage device 11 and the location information processing device 12 function as a location information aggregation device that aggregates location information related to the mobile communication terminal 2 and calculates a population distribution.
  • Each mobile communication terminal 2 is a mobile terminal having a communication function such as a mobile phone, PHS (Personal Handyphone System), PDA (Personal Digital Assistant), and is connected to the radio base station 3 by a mobile communication system.
  • data communication and voice communication can be performed between the mobile communication terminal 2 and the communication device connected to the mobile communication network NW via the radio base station 3 and the mobile communication network NW.
  • the location information calculation device 4, the location information provision device 5, the location information storage device 11, and the location information processing device 12 are server devices configured to be able to perform data communication with each other via the mobile communication network NW.
  • the information display device 6 is a terminal device such as a portable terminal or a computer terminal that is connected to the mobile communication network NW and configured to allow data communication with the position information processing device 12.
  • the location information providing apparatus 5 is also capable of data communication with the mobile communication terminal 2.
  • the location information calculation device 4, the location information providing device 5, the location information storage device 11, and the location information processing device 12 are each configured by one server device, but are configured by a plurality of distributed server devices. Conversely, the functions of a plurality of server devices may be integrated into one server device.
  • the mobile communication terminal 2 described above has a function of acquiring own position information using various positioning calculation methods, and has a function of executing positioning processing using GPS as one of the positioning calculation methods. is doing. That is, when the mobile communication terminal 2 receives a request for using the location information service from the user, the mobile communication terminal 2 acquires location information by acquiring information necessary for positioning processing from a GPS satellite or the like and executing positioning by GPS.
  • the positioning calculation by the GPS may be based on the calculation by the mobile communication terminal 2 alone, or a part of the calculation may be performed supplementarily by a server device such as the position information calculation device 4.
  • the mobile communication terminal 2 transmits a location information service request signal to the location information providing apparatus 5 using the positioning result.
  • This request signal includes, for example, a user ID “A” for identifying the user of the mobile communication terminal 2 and a positioning result “X1” using GPS.
  • round-trip delay times RTT1, RTT2, and RTT3 related to the radio base station 3 corresponding to the sector ID3 are included.
  • the sector ID 1, sector ID 2, and sector ID 3 are recognized by the mobile communication terminal 2 by receiving a pilot signal from the radio base station 3.
  • the location information providing device 5 When the location information providing device 5 receives the request signal from the mobile communication terminal 2, the location information providing device 5 extracts necessary information from the request signal corresponding to the location information acquisition method, and sends the location information calculation device 4 to the positioning related to the mobile communication terminal 2. Request an operation.
  • the positioning calculation method is selected from the positioning calculation methods “GPS”, “1D”, “2D”, “3D”, “1P”, “2P”, and “3P”.
  • the position information providing device 5 determines the sector ID 1 and sector for identifying the radio base station 3 in which the mobile communication terminal 2 is located from the request signal. ID2, sector ID3, and round-trip delay times RTT1, RTT2, and RTT3 are extracted.
  • the position information calculation device 4 has a radius corresponding to the round trip delay times RTT1, RTT2, and RTT3 with the positions of the radio base stations BS1, BS2, and BS3 corresponding to the sector ID1, sector ID2, and sector ID3 as the center. Circles having lengths L11, L12, and L13 are created, and the intersection of these circles is calculated as position information by three-point positioning indicating the position of the mobile communication terminal 2 (FIG. 3).
  • the position information providing apparatus 5 includes, from the request signal, the sector ID 1 and the sector ID 2 that specify the radio base station 3 in which the mobile communication terminal 2 is located, The round trip delay times RTT1 and RTT2 are taken out.
  • the position information calculation device 4 uses the positions of the radio base stations BS1 and BS2 corresponding to the sector ID1 and sector ID2 as the center, and the radii have lengths L21 and L22 corresponding to the round trip delay times RTT1 and RTT2. Create two circles and calculate the coordinates of the intersection of the two circles. Further, of the intersection coordinates, the coordinates located in the located sector S1 specified by the sector ID1 are calculated as position information by the two-point positioning of the mobile communication terminal 2 (FIG. 4).
  • the position information providing apparatus 5 determines the round-trip delay time and the sector ID 1 that identifies the radio base station 3 in which the mobile communication terminal 2 is located from the request signal. Take out RTT1.
  • the position information calculation device 4 creates a circle having a length L31 with a radius corresponding to the round trip delay time RTT1, with the position of the radio base station BS1 corresponding to the sector ID1 as the center. Then, the coordinates of the intersection of the circle and the center line R1 of the located sector S2 specified by the sector ID 1 are calculated as position information by one-point positioning of the mobile communication terminal 2 (FIG. 5).
  • the position information providing device 5 identifies the radio base station 3 in which the mobile communication terminal 2 is located from the request signal. Extract ID1, sector ID2, and sector ID3.
  • the position information calculation device 4 calculates a point located at an equal distance from the positions of the radio base stations BS1, BS2, BS3 corresponding to the sector ID1, sector ID2, and sector ID3, and moves the position of the point. It is calculated as position information indicating the position of the communication terminal 2 (FIG. 6). That is, this position information is obtained by predicting the center point of the three wireless base stations as the position of the mobile communication terminal.
  • the location information providing device 5 identifies the radio base station 3 in which the mobile communication terminal 2 is located from the request signal. Take out ID1 and sector ID2.
  • the position information calculation device 4 calculates the coordinates of the midpoint between the positions of the radio base stations BS1 and BS2 corresponding to the sector ID1 and the sector ID2, and uses the midpoint position as the position of the mobile communication terminal 2. Calculated as information (FIG. 7). That is, this position information is obtained by predicting the center point of two wireless base stations as the position of the mobile communication terminal.
  • the position information providing device 5 identifies the radio base station 3 in which the mobile communication terminal 2 is located from the request signal. Take ID1 out.
  • the position information calculation device 4 obtains the coordinates of the center of the serving sector S3 corresponding to the sector ID1, and calculates the center position as the position information of the mobile communication terminal 2 (FIG. 8). That is, this position information is obtained by predicting the center point in the sector of one wireless base station as the position of the mobile communication terminal.
  • the position information calculation device 4 When performing the positioning calculation as described above, and when the positioning calculation method “GPS” is selected and the request signal is received together with the positioning result by the mobile communication terminal 2, the position information calculation device 4 receives the positioning information. A positioning error corresponding to the calculation method is also calculated, added to the calculated position information, and returned to the position information providing apparatus 5.
  • the position information providing device 5 converts the position information into a predetermined data format and relays it to the mobile communication terminal 2. Then, the mobile communication terminal 2 converts the acquired position information into various output formats such as position display on the map and character information and displays them on the display. At that time, the position information providing device 5 relays the position information to the mobile communication terminal 2 and simultaneously transmits the position information related to the mobile communication terminal 2 and a positioning error corresponding to the position information storage device 11.
  • the location information storage device 11 includes a location information receiving unit (location information receiving unit) 111 and a location information storage unit 112 as functional components.
  • the location information receiving unit 111 receives location information regarding the location of the mobile communication terminal 2 from the location information providing device 5 every time a request for providing location information service is made by the mobile communication terminal 2, and sends it to the location information storage unit 112. Store. Specifically, the location information receiving unit 111 uses a mobile communication terminal 2 to identify a user ID (user identification information) that identifies a user of the mobile communication terminal 2 and time information indicating the time at which the location information was acquired in the mobile communication terminal 2. Position information indicating the position of the terminal 2, a positioning method for the position information, a sector ID indicating the in-service sector of the mobile communication terminal 2, and a positioning error corresponding to the positioning calculation method are received.
  • a user ID user identification information
  • FIG. 9 shows an example of the data configuration of the position information stored in the position information storage unit 112.
  • the location information storage unit 112 includes location information “X1, Y1” represented by two-dimensional coordinates related to the mobile communication terminal 2, a positioning method “GPS”, a serving sector ID “a”, and The error “10” is stored in association with the user ID “A”. This error is set to various values corresponding to the positioning method.
  • the location information is accumulated and stored every time there is a request for location information service provision from a plurality of mobile communication terminals 2, but the timing of storage is not limited to such timing, and location information provision is provided.
  • a predetermined amount of information may be buffered by the device 5 or other information storage device and then transferred to the position information storage device 11 periodically or at any time.
  • the position information processing apparatus 12 includes, as functional components, a request information reception unit 121, a position information acquisition unit 122, a position information conversion unit (position information conversion unit) 123, a distribution function storage unit 124, a totaling unit (totaling unit). 125, a sector information storage unit 126, and an information transmission unit 127.
  • the request information receiving unit 121 receives, from the information display device 6, request information for requesting aggregation of information regarding the population distribution of the mobile communication terminals 2 in a predetermined area in a predetermined time zone, and a position information acquisition unit according to the request information
  • the position information extraction process 122 is started.
  • the request information also includes time zone information for designating a time zone to be aggregated and area information for designating a predetermined area to be aggregated.
  • the location information acquisition unit 122 reads location information from the location information storage unit 112 of the location information storage device 11 in response to the activation signal from the request information reception unit 121.
  • the position information acquisition unit 122 extracts position information that matches the time zone information and area information included in the request information from the information display device 6 from all the read position information, and extracts the position information conversion unit. To 123. For example, when the time zone information indicating the condition of the position information to be processed is “3/1 1: 00-3: 00” and the area information “Nationwide Japan”, the time from the position information shown in FIG. All the position information indicating that the information is included in the time zone indicated by the time zone information and the position information is within the area of the area information is extracted.
  • the location information conversion unit 123 refers to the distribution function data stored in the distribution function storage unit 124 with respect to all the location information output from the location information acquisition unit 122, thereby obtaining the location information of the mobile communication terminal 2. Convert to probability density distribution indicating existence probability.
  • the location information conversion unit 123 refers to the sector information stored in the sector information storage unit 126 for the shape of the location sector where the mobile communication terminal 2 is located based on the sector ID included in the location information. And recognize.
  • the sector information storage unit 126 includes a sector ID “a” for identifying a sector formed by the radio base station 3 and a reference position “X8” indicating the center position of the sector. , Y8 ”, a base station position“ X11, Y11 ”indicating the position of the radio base station 3, a directing direction“ ⁇ 1 ”indicating the directing direction of the beam from the base station, and a beam width“ ⁇ 1 ”indicating the beam width,
  • the sector shape “Polygon” indicating the shape of the sector is stored in advance in association with each other. As shown in FIG.
  • the directivity direction “ ⁇ 1” indicates an angle formed by a predetermined reference line LA passing through the radio base station 3 and the sector centerline, and the beam width “ ⁇ 1” is the center of the sector.
  • the sector shape “Polygon” indicates that the polygon representing the sector shape is approximated to a sector shape as shown in the figure, and the reference position “X8, Y8” The center point C1 of the sector shape is shown.
  • the position information conversion unit 123 recognizes the position and shape of the serving sector of the mobile communication terminal 2 by referring to such sector information.
  • the position information conversion unit 123 sets a distribution function using the position indicated by each position information and an error corresponding to the positioning calculation method of the position information.
  • the position information conversion unit 123 when the position information positioning calculation method is “GPS”, “3D”, or “2D”, the following formula (1); Is used to set a distribution function representing the probability density distribution of the mobile communication terminal 2.
  • this distribution function is a two-dimensional normal distribution function F1 as shown in FIG. 12, where the average coordinates (Px, Py) are the position coordinates indicated by the position information, and the standard deviation ⁇ is the positioning calculation error. Each is set.
  • the position information conversion unit 123 represents a probability density distribution corresponding to the position and shape of the serving sector in which the mobile communication terminal 2 is located.
  • the position information conversion unit 123 has a normal distribution in the radial direction centered on the radio base station 3 in the located sector (the direction along the center line of the located sector in FIG. 11), and the angle within the located sector.
  • the distribution function F2 is set so as to have a uniform distribution in the direction (the direction along the central angle of the serving sector in FIG. 11) (FIGS. 13A and 13B).
  • the average value Pr is set to a value corresponding to the position indicated by the position information
  • the standard deviation ⁇ is set to an error in positioning calculation.
  • SA indicates the area of the serving sector.
  • the position information conversion unit 123 converts all the position information into distribution functions, and then outputs the converted position information to the counting unit 125.
  • the aggregation unit 125 generates population distribution data in a predetermined area to be aggregated by aggregating all the positional information converted by the positional information conversion unit 123. Specifically, the aggregation unit 125 superimposes all the distribution functions set in all the position information, and then divides the superimposed distribution functions into areas for each of a plurality of predetermined meshes. The plurality of meshes are set by dividing a predetermined area into a predetermined shape.
  • FIG. 14 the image of the distribution function to be overlaid is shown one-dimensionally simplified. As shown in the figure, after the two distribution functions F4 and F5 are overlaid, the overlaid distribution function F6 is integrated in the mesh range M1 to be counted.
  • FIG. 15 shows population distribution data generated by the totaling unit 125, and the totaling areas “mesh 1”, “mesh 2”, “mesh 3” in the time zone “1:00 to 3:00” to be totaled. , “Mesh 4”,... Then, the information transmission unit 127 returns the total result information to the information display device 6.
  • FIG. 16 is a sequence diagram showing an operation of position information aggregation by the position information aggregation system 1
  • FIG. 17 is a flowchart showing an operation of positioning by the mobile communication terminal 2
  • FIG. 18 is a position information calculation device 4 and a position information providing device.
  • FIG. 19 is a flowchart showing the population distribution totaling operation by the positional information totaling apparatus.
  • step S01 when a positioning request is received from the user of mobile communication terminal 2 (step S01), information necessary for using the location information service is collected in mobile communication terminal 2, and the location information and the location information are collected.
  • a position information request signal is transmitted to the information providing apparatus 5 (step S02).
  • the positioning calculation for the mobile communication terminal 2 is executed by the location information calculation device 4 (step S03), and the location information of the mobile communication terminal 2 is stored in the location information providing device 5 (step S04).
  • step S05 the stored location information is notified from the location information providing device 5 to the mobile communication terminal 2 (step S05), and is output to the display of the mobile communication terminal 2 in various display formats (step S06).
  • the location information of the mobile communication terminal 2 stored in the location information providing device 5 is transmitted to the location information storage device 11 in parallel with being notified to the mobile communication terminal 2 (step S07). Then, the position information is stored in the position information storage unit 112 of the position information storage device 11 (step S08).
  • the information display device 6 accepts a display request regarding the population distribution (step S09). Then, request information for requesting aggregation of information relating to population distribution is transmitted from the information display device 6 to the position information processing device 12 including time zone information and area information (step S10). Then, a position information reference request is transmitted from the position information processing device 12 to the position information storage device 11 (step S11), and thereby position information is read from the position information storage device 11 to the position information processing device 12 (step S11). S12). Next, the position information processing apparatus 12 aggregates the population distribution of a predetermined area for the read position information (step S13). Then, population distribution data is transmitted from the position information processing device 12 to the information display device 6 (step S14) and displayed in various output formats such as a map format and a graph format (step S15).
  • step S101 when a positioning request by the positioning calculation method “GPS” is received, the mobile communication terminal 2 performs positioning by GPS (step S101). Thereafter, the mobile communication terminal 2 determines whether or not the positioning by the GPS is successful (step S102). If the positioning is successful (step S102; YES), a request signal for the location information service by the positioning calculation method “GPS” is sent. The information is transmitted to the position information providing device 5 (step S103). On the other hand, when positioning by GPS has failed (step S102; NO), the wireless base station corresponding to the detected sector is detected after detecting a maximum of three sectors by receiving a pilot signal from the wireless base station 3. The round trip delay time RTT with the station 3 is measured (step S104). After that, a position information service request signal by a positioning calculation method according to the detected number of sectors and the number of RTTs is transmitted to the position information providing apparatus 5 (step S103).
  • the location information providing device 5 reads the acquisition method included in the request signal and determines whether or not the acquisition method is “GPS”. (Step S202). As a result, when the acquisition method is “GPS” (step S202; YES), an error corresponding to the positioning calculation method “GPS” is calculated by the position information calculation device 4 (step S203).
  • step S202 when the acquisition method is other than “GPS” (step S202; NO), whether or not the number of notifications of the round-trip delay time RTT from the mobile communication terminal 2 is “0” by the location information providing device 5. Is determined (step S204). If the number of round-trip delay time RTT notifications is not “0” as a result of the determination (step S204; NO), “1D”, “2D”, and “3D” are selected from the positioning calculation methods according to the number of RTT notifications. "Is selected, and the position information and its error are calculated by the position information calculation device 4 according to the calculation method (step S205).
  • step S204 when the number of round-trip delay time RTT notifications is “0” (step S204; YES), “1P” is selected from the positioning calculation methods according to the number of sector ID notifications from the mobile communication terminal 2. Any one of “2P” and “3P” is selected, and the position information and its error are calculated by the position information calculation device 4 by the calculation method (step S206). Thereafter, after the calculated position information and error are stored in the position information providing device 5, the position information is returned to the mobile communication terminal 2 (step S207).
  • the position information processing apparatus 12 reads position information from the position information storage apparatus 11 in accordance with request information from the information display apparatus 6 (step S301). Thereafter, the position information processing apparatus 12 determines an acquisition method included in each position information (step S302). If the acquisition method is “GPS”, “3D”, or “2D” as a result of determination, the position information processing device 12 uses the position indicated by each position information and the error corresponding to the position information. Then, the position information is converted into the distribution function F1 (step S303).
  • the position information processing apparatus 12 converts the position information into the distribution function F2 based on the respective position information, its error, and the position and shape of the serving sector. (Step S304). Further, when the acquisition method is “1P”, “2P”, or “3P”, the position information processing apparatus 12 converts the position information into the distribution function F3 based on the position and shape of the serving sector. (Step S305).
  • step S306 it is determined whether or not all the position information data has been converted by the position information processing device 12 (step S306). If the position information data to be converted remains as a result of the determination (step S306; NO), the process returns to step S302, and the position information conversion process is repeated. On the other hand, when all the position information data has been converted (step S306; YES), the position information processing device 12 adds all the distribution functions for each mesh in the total area, and totals it as population distribution data. Result information is generated (step S307). The population distribution data is transmitted to the information display device 6 and displayed.
  • FIG. 20 is a diagram showing a population distribution output screen displayed on the information display device 6.
  • the total range designated by the information display device 6 is “Nationwide”, the total meshes delimiting the whole Japan
  • the population distribution is visually displayed by color and shading.
  • the position information related to the mobile communication terminal 2 is received including the user ID, and an error corresponding to the positioning calculation method is set based on the position indicated by the position information.
  • the position information is converted into a probability density distribution, and the population distribution is tabulated by tabulating the converted probability density distribution.
  • each position information is aggregated in a distribution corresponding to the error, so that the position information obtained by various positioning calculation methods such as GPS positioning and positioning using the wireless base station 3 in the area is targeted. Even in this case, a highly accurate population distribution can be obtained.
  • a distribution function that has a normal distribution in the radial direction around the radio base station 3 and a uniform distribution in the angular direction is used.
  • the probability density distribution regarding the mobile communication terminal 2 can be appropriately set based on the distance from the radio base station 3 predicted by the RTT. As a result, population distribution can be tabulated more accurately.
  • the totalization unit 125 of the position information processing apparatus 12 may include various methods such as a method of adding distribution function values at the center point of the mesh in addition to a totaling method of overlapping the position information distribution functions and dividing the area for each mesh. Can be used.
  • FIG. 21 shows a distribution function to be aggregated by the aggregation unit 125 in a one-dimensionally simplified manner.
  • the distribution function F7 shown in FIG. 21A has a value V7 at the center point of the mesh range M2 to be aggregated
  • the distribution function F8 shown in FIG. 21B is at the center point of the mesh range M2 to be aggregated.
  • the totaling unit 125 can calculate the total value V7 + V8 as the total value of the mesh. If such a totaling method is adopted, even when the number of meshes to be totaled and the number of position information increase, the amount of calculation can be suppressed and the processing time can be shortened.
  • the positioning calculation method executed by the position information calculation device 4 may be four or more serving sectors and other methods using RTT, and the sector shape used for the calculation is also a specific shape. Is not limited.
  • the position information conversion unit 123 selects and sets a distribution function representing the probability density distribution from the functions F1, F2, and F3 according to the position information positioning calculation method.
  • a distribution function for stored position information a probability density distribution is specified based on the information included in the position information, and a function corresponding to the specified probability density distribution is used for conversion of position information. It may be set as a distribution function. For example, data specifying a distribution function (for example, “F1” or the like) or data of the distribution function itself is added to the position information stored in the information storage unit 112, and the distribution function is set based on the data. Can do.
  • a distribution function setting table for setting a distribution function as shown in FIG. 22 may be stored in the position information processing apparatus 12.
  • this distribution function setting table information indicating a positioning method and information specifying a distribution function corresponding to the positioning method are set in association with each other.
  • the distribution function specifying information “F1” is stored in association with the positioning method “GPS”.
  • the position information conversion unit 123 counts position information (FIG. 9) including “GPS” as information related to the positioning method, the distribution function specifying information “F1” corresponding to the positioning method “GPS” Read from the distribution function setting table. Then, the position information converting unit 123 sets the distribution function F1 specified from the distribution function specifying information as the distribution function for converting the corresponding position information.
  • FIG. 23 shows a flowchart of population distribution totaling processing by the position information processing apparatus 12 in such a case.
  • the position information processing device 12 reads position information from the position information storage device 11 in accordance with request information from the information display device 6 (step S401). Thereafter, the position information processing apparatus 12 reads the positioning method included in each position information, and refers to the distribution function setting table to identify the distribution function specifying information corresponding to the positioning method (step S402).
  • the position information processing apparatus 12 uses the position indicated by each position information and the error corresponding to the position information, The position information is converted into a distribution function F1 (step S404).
  • the position information processing apparatus 12 determines the position based on the position information, its error, and the position and shape of the serving sector. Information is converted into a distribution function F2 (step S405). Further, when it is determined that the distribution function specifying information is “F3” (step S403), the position information processing apparatus 12 converts the position information into the distribution function F3 based on the position and shape of the serving sector. (Step S405). Thereafter, in the same manner as steps S306 to S307 in FIG. 19, total result information as population distribution data is generated and displayed on the information display device 6 (steps S407 to S408).
  • the position information is tabulated with probability density distributions corresponding to the respective position information, so even when position information having various probability density distributions is targeted, higher accuracy is obtained.
  • Population distribution can be obtained.
  • the artificial distribution can be accurately totaled according to the probability density distribution.
  • the location information storage device 11 receives and stores location information related to the location of the mobile communication terminal 2 from the location information provision device 5 every time a request for providing location information service is made by the mobile communication terminal 2.
  • the opportunity for receiving and accumulating position information is not limited to this case.
  • the position information may be stored in the position information storage unit 112 at a timing at which the mobile communication terminal 2 periodically notifies the position information, or at a timing at which the position information is notified when the mobile communication terminal 2 moves.
  • Information may be stored, and position information may be stored by a combination of these timings.
  • the present invention uses a position information counting device and a position information counting method, and can calculate a highly accurate population distribution with little error even when a positioning method that causes various errors is used. is there.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention a pour but de calculer la distribution d'une population avec une précision élevée et peu d'erreurs, même lors de l'utilisation d'un procédé de mesure produisant des erreurs diverses. Un dispositif de tabulation d'informations de position comprend : un récepteur d'informations de position (111) qui reçoit des informations de position calculées par le procédé de calcul de mesure spécifié en fonction des positions d'une pluralité de terminaux de communication mobiles (2) et comprend un identifiant d'utilisateur spécifiant l'utilisateur d'un terminal de communication mobile (2) correspondant à chaque information de position ; une unité de conversion d'informations de position (123) qui utilise une fonction de répartition définie par la position indiquée par les informations de position et par l'erreur de calcul correspondant au procédé de calcul de la mesure pour convertir les informations de position en une distribution de densité de probabilité indiquant la probabilité de présence d'un terminal de communication mobile (2) ; et une unité de tabulation (125) qui tabule la distribution de la population dans une zone spécifique en tabulant les informations de position converties par l'unité de conversion d'informations de position (123).
PCT/JP2010/056839 2009-04-17 2010-04-16 Dispositif de tabulation d'informations de position et procédé de tabulation d'informations de position WO2010119948A1 (fr)

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WO2012133680A1 (fr) * 2011-03-31 2012-10-04 株式会社エヌ・ティ・ティ・ドコモ Dispositif de traitement d'informations et procédé permettant d'estimer un nombre de terminaux
JP2015008419A (ja) * 2013-06-25 2015-01-15 Kddi株式会社 多数のユーザの通信履歴から地図上の動線を抽出する装置、プログラム及び方法
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WO2012108539A1 (fr) * 2011-02-10 2012-08-16 株式会社エヌ・ティ・ティ・ドコモ Dispositif et procédé d'estimation du nombre de terminaux
CN103348705A (zh) * 2011-02-10 2013-10-09 株式会社Ntt都科摩 终端数量推算装置和终端数量推算方法
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JP2015008419A (ja) * 2013-06-25 2015-01-15 Kddi株式会社 多数のユーザの通信履歴から地図上の動線を抽出する装置、プログラム及び方法
CN114756825A (zh) * 2022-06-15 2022-07-15 合肥安迅精密技术有限公司 用于识别离散测量位置瞬时速度的方法及系统
CN114756825B (zh) * 2022-06-15 2022-09-02 合肥安迅精密技术有限公司 用于识别离散测量位置瞬时速度的方法及系统

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