WO2017208801A1 - Dispositif d'analyse, procédé d'analyse, et support lisible par ordinateur non-transitoire - Google Patents

Dispositif d'analyse, procédé d'analyse, et support lisible par ordinateur non-transitoire Download PDF

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Publication number
WO2017208801A1
WO2017208801A1 PCT/JP2017/018305 JP2017018305W WO2017208801A1 WO 2017208801 A1 WO2017208801 A1 WO 2017208801A1 JP 2017018305 W JP2017018305 W JP 2017018305W WO 2017208801 A1 WO2017208801 A1 WO 2017208801A1
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Prior art keywords
base station
distance
signal transmitted
communication terminal
received
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PCT/JP2017/018305
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English (en)
Japanese (ja)
Inventor
源 高橋
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日本電気株式会社
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Publication of WO2017208801A1 publication Critical patent/WO2017208801A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools

Definitions

  • the present invention relates to an analysis device, an analysis method, and a program, and more particularly, to an analysis device, an analysis method, and a program for specifying the position of a base station.
  • Big data is, for example, data that is a collection of data acquired by many communication terminals that communicate via a mobile network.
  • a telecommunications carrier may specify the location of a base station whose installation location is not specified, and design its own mobile network using the location information of the specified base station.
  • the base station whose installation position is not specified may be, for example, a base station installed by the company or a base station installed by another company.
  • an operator other than the communication operator may investigate the position of the base station in the mobile network.
  • Patent Document 1 discloses a configuration of an analysis apparatus that estimates a position of a base station using a communication log acquired from a mobile terminal.
  • the analysis device disclosed in Patent Literature 1 generates a level map in which reception levels of a plurality of mobile terminals are associated with each base station.
  • the analysis apparatus estimates the position of the base station in the level map, assuming that the position where the communication terminal having a reception level equal to or lower than x (dB) from the highest reception level is present has a high base station existence probability.
  • the analysis device disclosed in Patent Document 1 estimates the position of the base station using the position information of the mobile terminal whose reception level is within a predetermined range among the communication logs acquired from many mobile terminals. . Therefore, the portable terminals used for estimating the position of the base station are only some portable terminals among the plurality of portable terminals that have transmitted the communication log. Further, when narrowing the region where it is estimated that a base station exists, in order to narrow the predetermined range of the reception level in the level map, the position information of a smaller mobile terminal is used. For this reason, the analysis device disclosed in Patent Document 1 has a problem in that it cannot take advantage of the big data characteristic of improving estimation accuracy using a large amount of information.
  • An object of the present invention is to provide an analysis apparatus, an analysis method, and a program that can estimate the position of a base station using a large amount of information.
  • the analysis apparatus includes communication quality calculated in a plurality of communication terminals that have received a signal transmitted from a first base station whose position is specified, and the communication quality calculated from each communication terminal.
  • An expression generator that generates a relational expression that associates a distance to one base station, and communication quality calculated in a plurality of communication terminals that have received signals transmitted from a second base station whose position is not specified; , Using the relational expression, a distance estimation unit that estimates a distance from each communication terminal to the second base station, and each communication terminal that has received a signal transmitted from the second base station
  • a position estimation unit that estimates the position of the second base station using overlapping information of an area whose center is a position and whose radius is determined as the distance estimated by the distance estimation unit.
  • the analysis method includes communication quality calculated in a plurality of communication terminals that have received a signal transmitted from a first base station whose position has been specified, and the communication quality calculated from each communication terminal.
  • a relational expression for associating a distance to one base station, communication quality calculated in a plurality of communication terminals that have received signals transmitted from a second base station whose position is not specified, and the relational expression Are used to estimate the distance from each communication terminal to the second base station, and estimate the radius around the position of each communication terminal that has received the signal transmitted from the second base station.
  • the position of the second base station is estimated using the overlap information of the area determined as the distance.
  • the program according to the third aspect of the present invention includes: a communication quality calculated in a plurality of communication terminals that have received a signal transmitted from a first base station whose position is specified; Communication quality calculated in a plurality of communication terminals that received a signal transmitted from a second base station whose position is not specified, and a relational expression for associating a distance to a base station of Is used to estimate the distance from each communication terminal to the second base station, and the radius is estimated around the position of each communication terminal that has received the signal transmitted from the second base station. Further, the computer is caused to estimate the position of the second base station by using the overlapping information of the area determined as the distance.
  • the present invention it is possible to provide an analysis apparatus, an analysis method, and a program that can estimate the position of a base station using a large amount of information.
  • FIG. 1 is a configuration diagram of an analysis apparatus according to a first embodiment.
  • FIG. 3 is a configuration diagram of a communication system according to a second exemplary embodiment.
  • FIG. 3 is a configuration diagram of an analysis apparatus according to a second embodiment. It is a figure which shows the information which the analyzer concerning Embodiment 2 manages. It is a figure which shows the relationship between the distance from the base station and communication terminal concerning Embodiment 2, and path loss. It is a figure which shows the information which the analyzer concerning Embodiment 2 manages. It is a figure explaining the estimation process of the position of the base station concerning Embodiment 2.
  • FIG. It is a figure which shows the flow of the process which the analyzer concerning Embodiment 2 estimates the position of a base station.
  • FIG. 10 is a diagram for explaining base station position estimation processing according to the third embodiment; It is a figure which shows the flow of the process which the analyzer concerning Embodiment 3 estimates the position of a base station. It is a figure which shows the flow of the process which the analyzer concerning Embodiment 3 estimates the position of a base station. It is a block diagram of the analyzer concerning each embodiment.
  • the analysis device 10 may be a computer device that operates when a processor executes a program stored in a memory.
  • the computer device may be a server device, for example.
  • the analysis device 10 includes an expression generation unit 11, a distance estimation unit 12, and a position estimation unit 13.
  • the expression generation unit 11, the distance estimation unit 12, and the position estimation unit 13 may be software or modules in which processing is executed by a processor executing a program stored in a memory.
  • the expression generation unit 11, the distance estimation unit 12, and the position estimation unit 13 may be hardware such as a chip or a circuit.
  • the expression generation unit 11 relates the communication quality calculated in a plurality of communication terminals that have received the signal transmitted from the base station A whose position is specified, and the distance from each communication terminal to the base station A Is generated. It is assumed that the expression generation unit 11 manages the position of the base station A in advance.
  • the position of the base station A may be specified by latitude and longitude, for example.
  • a plurality of communication terminals are located in a communicable area formed by the base station A.
  • the communication terminal may be a computer device that operates when a processor executes a program stored in a memory.
  • the communication terminal may be, for example, a mobile phone terminal, a smartphone terminal, a tablet terminal, or the like.
  • the communication quality may be, for example, received power when the communication terminal receives a signal transmitted from the base station A.
  • the communication quality may be a path loss indicating the attenuation ratio of the signal transmitted from the base station A.
  • the communication quality may be throughput, delay, or the like.
  • the formula generator 11 may calculate the distance from each communication terminal to the base station A using the communication terminal position information and the base station A position information.
  • the location information may be, for example, the latitude and longitude of the communication terminal and the latitude and longitude of the base station A.
  • the expression generation unit 11 may acquire the position information of the communication terminal from the communication terminal as application information. Or the expression production
  • generation part 11 may acquire the positional information on a communication terminal from the core network which a communication carrier manages.
  • the expression generation unit 11 may acquire position information from the communication terminal periodically or at an arbitrary timing.
  • the relational expression is an expression that approximates the relationship between the distance from the base station A to the communication terminal and the communication quality at the communication terminal using a specific function.
  • the specific function may be an n-order function (n is an integer of 1 or more), a logarithmic curve, or the like.
  • the relational expression may be an expression determined using, for example, a least square method.
  • the relational expression may be an expression determined using a maximum likelihood method, for example.
  • the distance estimation unit 12 uses the communication quality calculated in the plurality of communication terminals that have received the signal transmitted from the base station B whose position is not specified, and the relational expression generated in the expression generation unit 11, The distance from each communication terminal to the base station B is estimated.
  • the base station B may be a base station managed by a telecommunications carrier different from the telecommunications carrier that manages the base station A.
  • the base station A may be a base station installed by a communication carrier, while the base station B may be a small base station or a femto base station installed by an individual.
  • the plurality of communication terminals that have received the signal transmitted from the base station B are located in a communicable area formed by the base station B.
  • the communicable area formed by the base station A and the communicable area formed by the base station B may or may not overlap.
  • the communication terminal may be a terminal that can communicate with the base station A and the base station B, or may be a terminal that can communicate with either one of the base stations.
  • the relational expression generated in the expression generation unit 11 is an expression that associates the distance from the base station A and the communication quality at the distance.
  • the distance estimation unit 12 is substantially equivalent to the “relationship between the distance from the base station B and the communication quality at that distance” as “the relationship between the distance from the base station A and the communication quality at that distance”. The distance is estimated on the assumption that the same tendency is shown. Therefore, the distance estimation unit 12 performs communication from the base station B by applying the communication quality calculated in the communication terminal that has received the signal transmitted from the base station B to the relational expression generated in the expression generation unit 11. The distance to the terminal can be estimated.
  • the position estimation unit 13 uses the overlapping information of the area determined by the distance estimated by the distance estimation unit 12 around the position of each communication terminal that has received the signal transmitted from the base station B as a base station. Estimate the position of B.
  • the area determined by the distance estimated by the distance estimation unit 12 with the position of each communication terminal as the center is defined as a search area.
  • the search area is different depending on the position of the communication terminal that has received the signal transmitted from the base station B.
  • the position estimation unit 13 superimposes a plurality of search areas, and estimates that the base station B exists in an area where the most search areas overlap.
  • the analysis apparatus 10 in FIG. 1 can generate a relational expression using the communication quality calculated in a plurality of communication terminals that have received the signal transmitted from the base station A.
  • the relational expression is an expression that approximates the relationship between the distance to the communication terminal centered on the base station A and the communication quality at the communication terminal using a specific function. The larger the number, the more accurate approximation can be made.
  • the analysis apparatus 10 can estimate the position of the base station B using a search area centered on the communication terminal that has received the signal transmitted from the base station B. Since the analysis apparatus 10 estimates that the base station B exists in an area where the search area overlaps most, the area where the base station B exists can be accurately estimated as the number of search areas increases.
  • the analysis apparatus 10 can accurately estimate the position of the base station B using a large number of data collected as big data.
  • the analysis device 50, the base station 20, and the base station 30 are connected via the Internet 40.
  • communication terminals 21 to 24 exist in the communicable area of the base station 20
  • communication terminals 31 to 34 exist in the communicable area of the base station 30.
  • the base station 20 may be the base station A in the first embodiment
  • the base station 30 may be the base station B in the first embodiment. That is, it is assumed that the analysis device 50 manages the position of the base station 20 but does not manage the position of the base station 30.
  • FIG. 2 shows that the base station 20 and the base station 30 are connected to the Internet 40.
  • the base station 20, the base station 30, and the Internet 40 are core networks managed by a communication carrier. It may be connected via.
  • FIG. 2 shows that there are four communication terminals in each communicable area of the base station 20 and the base station 30, but there are four communication terminals in each communicable area. It may exist above.
  • the base station 20 may be managed by the same carrier as the carrier that manages the base station 30, or may be managed by a carrier different from the carrier that manages the base station 30.
  • the analysis apparatus 50 may receive the information regarding the communication quality calculated at each communication terminal and the position information regarding each communication terminal via the base station 20 and the Internet 40. Furthermore, the analysis device 50 may receive information on communication quality calculated at each communication terminal and position information about each communication terminal via the base station 30 and the Internet 40. Alternatively, the analysis device 50 uses the access point and the Internet 40 used in the wireless LAN communication instead of the base station 20 or the base station 30 for the information regarding the communication quality calculated in each communication terminal and the position information regarding each communication terminal. You may receive via.
  • the analysis device 50 has a configuration in which a database 14 is added to the analysis device 10 of FIG. 3 shows a configuration in which the analysis device 50 has the database 14, but a device different from the analysis device 50 may have the database 14.
  • information managed by the database 14 will be described.
  • the base station 20 is a base station managed by the communication carrier A
  • the base station 30 is a base station managed by the communication carrier B. Further, it is assumed that the position of the base station 20 is specified, but the position of the base station 30 is not specified. That is, the analysis device 50 is used to specify the position of the base station 30.
  • the database 14 includes a database related to the base station 20 and a database related to the base station 30.
  • FIG. 4 shows a database related to the base station 20.
  • the database shown in FIG. 4 manages information measured by the communication terminals 21 to 24 using signals transmitted from the base station 20.
  • the database in FIG. 4 manages information measured by the communication terminal for each measurement point measured by the communication terminal using the signal transmitted from the base station 20.
  • the information described outside the table in FIG. 4 indicates the position information of the base station 20 and the transmission power of the signal transmitted by the base station 20.
  • the base station 20 is located at a latitude of 35.5746 degrees and a longitude of 139.66 degrees.
  • the base station 20 transmits a signal with a transmission power of 18 (dBm).
  • Lat indicates latitude, and Lon indicates longitude.
  • Carrier indicates a business operator that manages the base station 20.
  • CellIdentity indicates cell identification information formed by the base station 20.
  • eNBId indicates identification information of the base station 20.
  • Cell indicates identification information of a cell in which the communication terminal is located.
  • PCI Physical Cell Identity
  • EARFCN indicates a frequency band related to a signal transmitted by the base station 20.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • RSSI Reference Signal Strength Strength Indicator
  • SINR Signal Interference Plus Noise Noise Power Ratio
  • RSRP (dBm) indicates the magnitude of the received power of the signal received by the communication terminal.
  • d indicates the distance between the base station 20 and the communication terminal.
  • PathLoss path loss is information indicating the attenuation ratio of the signal transmitted from the base station 20 at the position of the communication terminal that has received the signal transmitted from the base station 20.
  • Path loss (dB) transmission of the base station 20 Calculated as power (dBm) -RSRP (dBm).
  • FIG. 5 is a diagram showing the value of the path loss for each distance d in FIG.
  • the horizontal axis in FIG. 5 indicates the distance d (meter), and the vertical axis indicates the path loss (dB).
  • the straight line in FIG. 5 is a value indicated by an equation that simulates the value of the path loss.
  • the straight line in FIG. 5 represents an expression of a linear function that simulates the path loss value using regression analysis by the least square method.
  • the equation indicated by the straight line in FIG. 5 is referred to as a path loss equation.
  • the path loss formula is generated in the formula generation unit 11.
  • the contribution ratio R 2 that is an evaluation index of the path loss formula is 0.6222.
  • the path loss equation in FIG. 5 indicates that the attenuation rate increases and the communication quality decreases as the position of the communication terminal moves away from the base station 20.
  • the expression generation unit 11 may generate the path loss expression again using regression analysis by the least square method, or other regression analysis methods For example, the path loss equation may be generated using a maximum likelihood method or the like.
  • the analysis apparatus 50 uses the path loss expression generated by the expression generation unit 11 to Execute the process.
  • the contribution rate may be referred to as a determination coefficient of regression analysis by the least square method.
  • some expressions may be generated as alternatives to the contribution rate, and the path loss expression may be evaluated based on a value such as Akaike's Information Criterion (AIC).
  • AIC Akaike's Information Criterion
  • the evaluation index of the path loss formula is not limited to the contribution rate and the Akaike information reference amount, and other evaluation indices may be used.
  • FIG. 6 shows a database related to the base station 30.
  • the database in FIG. 6 manages information measured by the communication terminals 31 to 34 using signals transmitted from the base station 30.
  • the database in FIG. 6 manages information measured by the communication terminal for each measurement point measured by the signal transmitted from the base station 20 by the communication terminal.
  • the position of the base station 30 is not specified. Therefore, the position of the base station 30 is not shown as in FIG. 4 which is a database related to the base station 20. Further, it is assumed that the transmission power of the signal transmitted by the base station 30 is 18 (dBm) as in the base station 20.
  • the value r ⁇ for search is used instead of the distance d in FIG. r indicates the value of d obtained when the path loss value is substituted into L of the path loss equation. That is, r is a value indicating the distance between the communication terminal and the base station 30. r for serach indicates that the position of the base station 30 is estimated by searching in a circle with a radius r centering on the position of the communication terminal. The value of the radius r is calculated by the distance estimation unit 12.
  • FIG. 7 shows a plane in a certain area, and shows that the plane is divided into a plurality of grids.
  • a grid shows the area divided
  • FIG. 7 is a plane whose position can be specified using latitude and longitude.
  • the horizontal line may be a latitude line indicating the same latitude
  • the vertical line may be a meridian indicating the same longitude.
  • points indicated by squares indicate measurement points at which each communication terminal calculates a path loss.
  • a point along the road may be used as the measurement point.
  • Square points indicated by thick lines indicate measurement points for calculating a path loss related to a signal transmitted from the base station 30.
  • a relatively large circle centered on a square indicated by a thick line indicates an area of a circle with a radius r centered on the position of the communication terminal that has received the signal transmitted from the base station 30.
  • the radius r is a value calculated by substituting the path loss calculated at the measurement point into the path loss equation.
  • the intersection of relatively large circles centered on the square indicated by the bold line is shown using a sufficiently small circle.
  • FIG. 7 shows that the intersections when the circles with the radius r are superimposed are concentrated on the specific grid A around the measurement point where the path loss is calculated using the signal transmitted from the base station 30. ing.
  • the position estimation unit 13 estimates that the base station 30 is located in the grid A that includes the most intersections.
  • a point indicated by a triangle indicates an estimated position of the base station 30.
  • the distance estimation unit 12 calculates a path loss at each measurement point using a database related to the base station 30 (S11).
  • the distance estimation unit 12 starts a loop process (S12).
  • the distance estimation unit 12 calculates the radius r (i) for the measurement point i using the path loss equation (S13).
  • the radius r (i) indicates the value of the radius r at the measurement point i.
  • the distance estimation unit 12 replaces i with i + 1 in order to calculate the value of the radius r at the next measurement point (S14).
  • the processes after step S12 are repeated (S15).
  • the position estimation unit 13 also starts a different loop process (S18).
  • the position estimation unit 13 determines whether or not there is an intersection of a circle having a radius r (i) centered on the measurement point i and a circle having a radius r (j) centered on the measurement point j ( S19). For example, if the distance between the measurement point i and the measurement point j is d (i, j), the position estimation unit 13 is d (i, j) ⁇ r (i) + r. If (j) is satisfied, it is determined that there is an intersection.
  • the position estimation unit 13 determines that there is an intersection of a circle with a radius r (i) centered on the measurement point i and a circle with a radius r (j) centered on the measurement point j
  • the position estimation unit 13 calculates an intersection coordinate ( S20). For example, the position estimation unit 13 determines that the sum of the distance from the arbitrary coordinate (x, y) to the measurement point i and the distance from the arbitrary coordinate (x, y) to the measurement point j is r (i) + r.
  • the coordinates (x, y) satisfying (j) are set as the intersection coordinates. In the intersection coordinates, x represents longitude and y represents latitude.
  • the position estimation unit 13 stores the latitude and longitude of the intersection in Cross_Lat (k) and Cross_Lon (k) (S21).
  • Cross_Lat (k) and Cross_Lon (k) are information indicating storage locations on the memory where the variable is k.
  • the position estimation unit 13 replaces k with k + 1 in order to store the intersection coordinate information at the next storage position (S22). Further, the position estimation unit 13 determines j as j + 1 in order to determine whether or not there is an intersection between a circle with a radius r (i) centered on the measurement point i and a circle with a radius r centered on the next measurement point. (S23). Next, the position estimation unit 13 determines whether or not there is an intersection of a circle with a radius r (i) centered on the measurement point i and a circle with a radius r (j + 1) centered on the measurement point j + 1. The processes after step S18 are repeated (S24).
  • step S19 if the position estimation unit 13 determines that there is no intersection of a circle with a radius r (i) centered on the measurement point i and a circle with a radius r (j) centered on the measurement point j. Then, the processing after step S23 is executed.
  • the position estimator 13 determines the presence or absence of an intersection at a radius r (N) centered on the measurement point N and a circle with a radius r (i) centered on the measurement point i, i replaces i with i + 1 (S25). .
  • the position estimation unit 13 determines whether or not there is an intersection between a circle having a radius r (i + 1) centered on the measurement point i + 1 and a circle having a radius r (j) centered on the measurement point j.
  • the processes after step S17 are repeated (S26).
  • the analysis apparatus 50 can estimate the position of the base station 30 whose position is not specified using the path loss as the communication quality.
  • the distance estimation unit 12 sets the transmission power of the signal transmitted from the base station 30 to the same value as that of the base station 20. Accordingly, the position estimation unit 13 assumes that the attenuation rate between the base station 30 and the communication terminal shows substantially the same tendency as the attenuation rate between the base station 20 and the communication terminal. The position can be estimated.
  • the database in FIG. 4 indicates that only signals in the same frequency band among the signals transmitted from the base station 20 are used.
  • the attenuation rate between the base station 30 and the communication terminal can be set to have the same tendency as the attenuation rate between the base station 20 and the communication terminal.
  • by generating a path loss equation using only signals in the same frequency band it is possible to improve the accuracy of approximation of the path loss equation. By using only signals in the same frequency band, the estimation accuracy of the position of the base station 30 can be improved.
  • signals related to a plurality of frequency bands may be added to the databases of FIGS. 4 and 6. This is because when the number of measurement points is sufficiently large, the approximation accuracy of the path loss equation and the estimation accuracy of the position of the base station 30 can be improved.
  • a delay amount may be used as the communication quality.
  • a coefficient is calculated using a change in distance per unit delay time. You may link
  • FIG. 11 shows a plane in a certain area, and shows that the plane is divided into a plurality of grids.
  • a grid shows the area divided
  • FIG. 11 is a plane whose position can be specified using latitude and longitude.
  • the horizontal line may be a latitude line indicating the same latitude
  • the vertical line may be a meridian indicating the same longitude.
  • the points indicated by the squares in FIG. 11 indicate the measurement points at which each communication terminal calculates the path loss. For example, a point along the road may be used as the measurement point.
  • Square points indicated by thick lines indicate measurement points for calculating a path loss related to a signal transmitted from the base station 30.
  • a relatively large circle centered on a square indicated by a thick line indicates an area of a circle with a radius r centered on the position of the communication terminal that has received the signal transmitted from the base station 30.
  • the radius r is a value calculated by substituting the path loss calculated at the measurement point into the path loss equation.
  • the position estimation unit 13 extracts a grid included in a relatively large circle centered on a square indicated by a thick line.
  • the position estimation unit 13 extracts a grid included in the circle for each circle having a radius r centered on each measurement point.
  • the position estimation unit 13 estimates that the base station 30 is located on the grid with the largest number of extractions. Specifically, the position estimation unit 13 estimates that the base station 30 is located on the grid B shown in FIG.
  • a point indicated by a cross indicates an estimated position of the base station 30.
  • the position estimation unit 13 extracts a grid included in a circle having a radius r (i) with the measurement point i as the center (S33). For example, the position estimation unit 13 extracts a grid in which the center of the grid is included in a circle. Alternatively, the position estimation unit 13 extracts a grid in which an arbitrary position in the grid is included in the circle. In the subsequent processing, a case will be described in which the position estimation unit 13 extracts a grid in which the center of the grid is included in a circle.
  • the position estimation unit 13 manages the center coordinates of the grid in advance.
  • the center coordinates of the grid are shown using latitude and longitude.
  • the center coordinates of the grid are (X, Y), and the coordinates of the measurement point i are (Xi, Yi).
  • the position estimation unit 13 satisfies (X ⁇ Xi) 2 + (Y ⁇ Yi) 2 ⁇ r 2 (i)
  • the center of the grid is within a circle having a radius r (i) with the measurement point i as the center. Is determined to be included.
  • the position estimation unit 13 determines whether or not the central coordinates satisfy (X ⁇ Xi) 2 + (Y ⁇ Yi) 2 ⁇ r 2 (i) for each managed central coordinate.
  • the position estimation unit 13 extracts a grid whose center coordinates satisfy (X ⁇ Xi) 2 + (Y ⁇ Yi) 2 ⁇ r 2 (i).
  • the position estimation unit 13 specifies the center coordinates of the extracted grid (S34). Next, the position estimation unit 13 stores the latitude and longitude indicating the extracted center coordinates of the grid in Gridd_Lat (k) and Gridd_Lon (k) (S35). Gridd_Lat (k) and Gridd_Lon (k) are information indicating storage locations on the memory where the variable is k.
  • the position estimation unit 13 replaces k with k + 1 in order to store the central coordinate information at the next storage position (S36). Further, the position estimation unit 13 replaces i with i + 1 in order to extract a grid included in a circle having a radius r (i + 1) centered on the measurement point i + 1 (S37).
  • the position estimation unit 13 repeats the processing from step SS32 onward in order to extract a grid included in a circle having a radius r (i + 1) centered on the measurement point i + 1 (S38).
  • the position estimation unit 13 estimates that the base station 30 is located in the grid having the center coordinates with the largest number of times counted (S40).
  • the analysis device 50 extracts a grid included in a circle having a radius r (i) with the measurement point i as the center, thereby determining a base station whose position is not specified. Thirty positions can be estimated.
  • FIG. 14 is a block diagram illustrating a configuration example of the analysis apparatuses 10 and 50.
  • the analysis apparatuses 10 and 50 include a network interface 1201, a processor 1202, and a memory 1203.
  • the network interface 1201 is used to communicate with the network node.
  • the network interface 1201 may include, for example, a network interface card (NIC) compliant with IEEE 802.3 series.
  • NIC network interface card
  • the processor 1202 reads the software (computer program) from the memory 1203 and executes it, thereby performing the processing of the analysis devices 10 and 50 described using the sequence diagrams and flowcharts in the above-described embodiment.
  • the processor 1202 may be, for example, a microprocessor, MPU, or CPU.
  • the processor 1202 may include a plurality of processors.
  • the processor 1202 may include a plurality of processors.
  • the processor 1004 includes a modem processor (eg, DSP) that performs digital baseband signal processing, a processor that performs signal processing of the GTP-U / UDP / IP layer in the X2-U interface and the S1-U interface (eg, DSP) and a protocol stack processor (eg, CPU or MPU) that performs control plane processing may be included.
  • DSP modem processor
  • a processor that performs signal processing of the GTP-U / UDP / IP layer in the X2-U interface and the S1-U interface eg, DSP
  • a protocol stack processor eg, CPU or MPU
  • the memory 1203 is configured by a combination of a volatile memory and a nonvolatile memory.
  • Memory 1203 may include storage located remotely from processor 1202. In this case, the processor 1202 may access the memory 1203 via an I / O interface not shown.
  • the memory 1203 is used for storing software module groups.
  • the software module group may be location information, map information, or database information of measurement information.
  • the processor 1202 can perform the processing of the analysis apparatuses 10 and 50 described in the above-described embodiment by reading these software module groups from the memory 1203 and executing them.
  • each of the processors included in the analysis apparatuses 10 and 50 in the above-described embodiment includes one or a plurality of instructions including instructions for causing a computer to execute the algorithm described with reference to the drawings. Run the program.
  • Non-transitory computer readable media include various types of tangible storage media (tangible storage medium).
  • Examples of non-transitory computer-readable media include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (Random Access Memory)) are included.
  • the program may also be supplied to the computer by various types of temporary computer-readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
  • the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
  • a distance estimation unit that estimates the distance to The second base station using overlapping information of an area whose center is the position of each communication terminal that has received the signal transmitted from the second base station and whose radius is determined as the distance estimated by the distance estimation unit
  • a position estimation unit that estimates the position of the analysis device.
  • the position estimation unit The analysis apparatus according to appendix 2, wherein the analysis apparatus has information related to a divided area obtained by dividing a predetermined area into a plurality of areas, and estimates that the second base station exists in a divided area including the largest number of intersections.
  • the position estimation unit Note that an overlapping area in a circle whose center is the position of each communication terminal that has received the signal transmitted from the second base station and whose radius is determined as the distance estimated by the distance estimating unit is used as the overlapping information.
  • the analysis apparatus according to 1.
  • the position estimation unit It has information on divided areas obtained by dividing a predetermined area into a plurality of areas, and for each circle, the divided areas included in the circle are extracted, and the first extracted in the divided area with the largest number of extractions.
  • the analysis device which estimates that two base stations exist.
  • the expression generator is The analysis apparatus according to any one of appendices 1 to 5, wherein the relational expression is generated as an expression of a linear function simulated by a regression analysis using a least square method.
  • the expression generator is The analysis apparatus according to any one of appendices 1 to 6, which is used as the relational expression when an expression of a linear function simulated by a regression analysis using a least square method exceeds a predetermined contribution rate.
  • the expression generator is The analysis apparatus according to any one of appendices 1 to 6, which is used as the relational expression when an expression of a linear function simulated by regression analysis using a maximum likelihood method exceeds a predetermined Akaike information reference amount.
  • the expression generator is The analysis apparatus according to any one of appendices 1 to 8, wherein the relational expression is generated using signals transmitted at the same frequency.
  • the communication quality is It is a path loss calculated using the transmission power of the signal transmitted from the first or second base station and the reception power in the communication terminal that has received the signal transmitted from the first or second base station.
  • the analyzer according to any one of appendices 1 to 9.
  • the distance estimation unit The analysis apparatus according to appendix 10, wherein the same value as the transmission power of the signal transmitted from the first base station is used as the transmission power value of the signal transmitted from the second base station.
  • Appendix 12 A relational expression for associating the communication quality calculated in the plurality of communication terminals that have received the signal transmitted from the first base station whose position is specified with the distance from each communication terminal to the first base station.
  • each communication terminal uses the second base station.
  • Estimate the distance to The position of the second base station is estimated using the overlapping information of the area determined as the distance with the radius estimated from the position of each communication terminal that has received the signal transmitted from the second base station.
  • Analysis method. (Appendix 13) A relational expression for associating the communication quality calculated in the plurality of communication terminals that have received the signal transmitted from the first base station whose position is specified with the distance from each communication terminal to the first base station.
  • each communication terminal uses the second base station.
  • Estimate the distance to The position of the second base station is estimated using the overlapping information of the area determined as the distance with the radius estimated from the position of each communication terminal that has received the signal transmitted from the second base station.

Abstract

La présente invention vise à fournir un dispositif d'analyse capable d'utiliser de multiples éléments d'informations pour estimer la position d'une station de base. Un dispositif d'analyse (10) selon la présente invention comporte : une unité de génération d'expression (11) qui génère une expression relationnelle associant une qualité de communication, calculée pour chacun d'une pluralité de terminaux de communication qui ont reçu un signal émis par une première station de base, dont la position a été déterminée, à la distance entre chaque terminal de communication et la première station de base ; une unité d'estimation de distance (12) qui estime la distance entre chaque terminal de communication et une seconde station de base en utilisant l'expression relationnelle et les qualités de communication calculées pour chacun de la pluralité de terminaux de communication qui ont reçu un signal émis par la seconde station de base, dont la position n'a pas été déterminée ; et une unité d'estimation de position (13) qui estime la position de la seconde station de base à l'aide d'informations de chevauchement relatives aux zones qui sont centrées autour de la position de chaque terminal de communication qui a reçu le signal émis par la seconde station de base, et dont les rayons sont définis comme étant la distance correspondante estimée par l'unité d'estimation de distance (12).
PCT/JP2017/018305 2016-06-03 2017-05-16 Dispositif d'analyse, procédé d'analyse, et support lisible par ordinateur non-transitoire WO2017208801A1 (fr)

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JPH11248783A (ja) * 1998-03-06 1999-09-17 Mitsubishi Electric Corp 部分放電検出装置
JP2006504284A (ja) * 2001-12-27 2006-02-02 クゥアルコム・インコーポレイテッド 無線移動体通信システムにおける基地局の位置パラメータの決定のための移動局の使用方法
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