WO2013065225A1 - 位置推定装置、位置推定方法、プログラムおよび集積回路 - Google Patents
位置推定装置、位置推定方法、プログラムおよび集積回路 Download PDFInfo
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- WO2013065225A1 WO2013065225A1 PCT/JP2012/005742 JP2012005742W WO2013065225A1 WO 2013065225 A1 WO2013065225 A1 WO 2013065225A1 JP 2012005742 W JP2012005742 W JP 2012005742W WO 2013065225 A1 WO2013065225 A1 WO 2013065225A1
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- wireless terminal
- base station
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- distance
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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
- G01S5/0284—Relative positioning
- G01S5/0289—Relative positioning of multiple transceivers, e.g. in ad hoc networks
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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
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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
- G01S5/0205—Details
- G01S5/021—Calibration, monitoring or correction
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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
- G01S5/0247—Determining attitude
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
Definitions
- the present invention relates to a technique for estimating the position of a wireless terminal.
- HEMS Home Energy Management System
- IT Information Technology
- HEMS performs control such as switching the power ON / OFF of home electric appliances according to the position of the user who uses the system, a highly accurate position measurement technique is required indoors.
- the distance from the base station to the wireless terminal is estimated using the property that the reception intensity of radio waves attenuates according to the distance from the base station as shown in FIG.
- an object of the present invention is to provide a position estimation device that estimates the position of a wireless terminal with high accuracy.
- a position estimation apparatus is a position estimation apparatus that estimates a current position of a wireless terminal, and signals received by the wireless terminal from a plurality of base stations that communicate with the wireless terminal.
- a distance estimation unit that estimates distance information indicating a distance from each of the plurality of base stations to the wireless terminal, base station information indicating a position of each of the plurality of base stations, and the estimated Using the distance information, a position estimation unit that estimates a first position that is the current position of the wireless terminal, the acceleration and direction of the wireless terminal at the estimated first position, and the estimated first position
- a correction unit that corrects the distance information based on the base station information, and the position estimation unit further determines a second position using the base station information and the corrected distance information. Estimating a current position of the serial radio terminal.
- FIG. 1 is a block diagram illustrating a configuration of the position estimation apparatus according to the first embodiment.
- FIG. 2 is an example of a graph showing the relationship between electric field strength and distance.
- FIG. 3 is a diagram illustrating an example of a method for estimating the current position of a wireless terminal using distance information.
- FIG. 4 is an example showing a model pattern of acceleration information in each wearing state of the wireless terminal in the first embodiment.
- FIG. 5 is a specific example of the terminal information of the detected wireless terminal in the first embodiment.
- FIG. 6 is an example of base station management information in the first embodiment.
- FIG. 7 is an example of measured reception intensity and estimated distance information in the first embodiment.
- FIG. 8 is an explanatory diagram showing the relationship between the terminal posture and the reception strength in the first embodiment.
- FIG. 1 is a block diagram illustrating a configuration of the position estimation apparatus according to the first embodiment.
- FIG. 2 is an example of a graph showing the relationship between electric field strength and distance.
- FIG. 3 is a diagram
- FIG. 9 is a correspondence example between the terminal posture and the correction magnification in the first embodiment.
- FIG. 10 is an explanatory diagram illustrating the relationship between the positional relationship between the base station, the wireless terminal, and the user and the reception strength according to the first embodiment.
- FIG. 11 is a correspondence example of the positional relationship between the base station, the wireless terminal, and the user and the correction magnification in the first embodiment.
- FIG. 12 is a flowchart showing the operation of the position estimation apparatus in the first embodiment.
- FIG. 13 is a flowchart showing the operation of the position estimation apparatus in the first embodiment.
- FIG. 14 is a flowchart showing the operation of the position estimation apparatus in the first embodiment.
- FIG. 15 is a flowchart illustrating the operation of the position estimation apparatus according to the first embodiment.
- FIG. 16 is a diagram illustrating a calculation result example of the direction of the base station from the wireless terminal in the first embodiment.
- FIG. 17 is a diagram illustrating a determination result example of whether or not there is a user between the base station and the wireless terminal in the first embodiment.
- FIG. 18 is a diagram illustrating an estimation result of the current position using the corrected distance information in the first embodiment.
- FIG. 19 is a block diagram showing a configuration of the position estimation apparatus in the second embodiment.
- FIG. 20 is an explanatory diagram showing an example of an electric field strength map in the second embodiment.
- FIG. 21 is a flowchart illustrating the operation of the position estimation apparatus according to the second embodiment.
- FIG. 22 is a flowchart showing the operation of the position estimation apparatus according to the second embodiment.
- FIG. 23 is a block diagram showing the minimum configuration of the position estimation apparatus according to the present invention.
- FIG. 24 is a flowchart showing the operation of the minimum configuration of the position estimation apparatus according to the present invention.
- a position estimation apparatus is a position estimation apparatus that estimates a current position of a wireless terminal, from a plurality of base stations that communicate with the wireless terminal.
- a distance estimation unit that estimates distance information indicating a distance from each of the plurality of base stations to the wireless terminal using reception intensity of the received signal, base station information indicating a position of each of the plurality of base stations, and Using the estimated distance information, a position estimation unit that estimates a first position that is a current position of the wireless terminal, an acceleration and a direction of the wireless terminal at the estimated first position, and the estimated
- a correction unit that corrects the distance information based on the first position and the base station information, and the position estimation unit further uses the base station information and the corrected distance information, 2 position is estimated as the current position of the wireless terminal.
- the position estimation device calculates the terminal posture of the wireless terminal based on the acceleration information and the direction information, and corrects the distance information according to the terminal posture, thereby The accuracy of distance information can be increased.
- the position estimation apparatus can similarly increase the accuracy of estimated position information by using highly accurate distance information for position estimation.
- the position estimation apparatus is the above first aspect, for example, wherein the position estimation apparatus is configured in the wireless terminal, and further detects acceleration and direction of the wireless terminal.
- a detection unit may be provided.
- the position estimation device further detects the attitude of the wireless terminal using the acceleration and direction of the wireless terminal.
- An attitude detection unit may be provided, and the correction unit may correct the distance information using the detected attitude, the estimated first position, and the base station information.
- the correction unit may detect the first position estimated as the detected posture and the first position.
- the base station information indicates that the attitude of the radio terminal with respect to one base station is not front
- the one base station is more than when the attitude of the radio terminal with respect to the one base station is front.
- the distance information estimated as the distance from the wireless terminal to the wireless terminal may be corrected so as to increase.
- the position estimation apparatus is any one of the first to fourth aspects.
- the position estimation apparatus further estimates using the acceleration of the wireless terminal.
- a wearing state determination unit that determines a wearing state indicating a state in which the wireless terminal is worn by the user at the first position, and an acceleration and a direction of the wireless terminal
- a moving direction determination unit that determines a moving direction of the wireless terminal
- the correction unit determines the determined wearing state, the determined moving direction, the estimated first position, and the base station Information may be used to identify a positional relationship between each of the plurality of base stations, the user, and the wireless terminal, and the distance information may be corrected according to the identified positional relationship.
- the correction unit exists between the base station and the wireless terminal where the user is based on the identified positional relationship.
- the distance information estimated as the distance from the one base station to the wireless terminal is greater than when there is no user between the one base station and the wireless terminal. You may correct
- the position estimation device is configured so that the correction unit determines whether the user is connected between one base station and the wireless terminal according to the specified positional relationship. And that the wireless terminal is present in the chest pocket of the user's clothes, the wireless terminal can transmit the wireless terminal from other base stations than when the wireless terminal is held in the user's hand. You may correct
- the correction unit is configured such that each of the plurality of base stations communicates with the wireless terminal.
- the distance information may be corrected according to the frequency band used for the above.
- the position estimation device is the distance from the first position to the second position, for example, in any one of the first to eighth aspects. If is greater than or equal to a predetermined value, the distance information may be corrected again using the second position as the first position.
- the position estimation device is configured so that the correction unit is configured such that the distance from the first position to the second position is equal to or greater than the predetermined value.
- the second position is the first position
- the distance information is corrected based on the acceleration and direction of the wireless terminal at the first position, the first position, and the base station information
- the position estimation unit Further, the second position may be estimated as the current position of the wireless terminal using the base station information and the corrected distance information.
- a position estimation apparatus is a position estimation apparatus that estimates a current position of a wireless terminal, and communicates with the wireless terminal at predetermined intervals.
- a storage unit that stores an electric field strength map that records the reception strength of the signal received by the wireless terminal from each of the plurality of base stations, and a measurement that measures the reception strength of the signal received by the wireless terminal from the plurality of base stations And the reception intensity measured by the measurement unit and the electric field strength map stored in the storage unit, the current position of the wireless terminal, and the position where the reception intensity is measured.
- a device that determines a wearing state indicating a state in which the wireless terminal at the estimated first position is worn by a user using a position estimation unit that estimates a position and acceleration of the wireless terminal.
- a state determination unit, a movement direction determination unit that determines the movement direction of the wireless terminal at the estimated first position, using the acceleration and direction of the wireless terminal, and the determined wearing state are determined.
- the positional relationship between each of the plurality of base stations, the user, and the wireless terminal is specified, and the reception intensity is corrected according to the specified positional relationship.
- the position estimation unit estimates the second position as the current position of the wireless terminal using the corrected reception intensity and the stored electric field intensity map.
- the position estimation apparatus is configured in the wireless terminal, and further detects acceleration and direction of the wireless terminal.
- a detection unit may be provided.
- the position estimation device according to the thirteenth aspect according to the eleventh or twelfth aspect further detects the attitude of the wireless terminal using the acceleration and direction of the wireless terminal.
- An attitude detection unit may be provided, and the correction unit may further correct the reception intensity using the detected attitude.
- a recording medium recording medium such as a system, a method, an integrated circuit, a computer program or a computer-readable CD-ROM, and the system, method, integrated circuit, You may implement
- the position estimation apparatus 100 of the present invention is provided in a wireless terminal such as a mobile phone, for example, and has a function of estimating the current position of the wireless terminal (hereinafter referred to as a target terminal).
- FIG. 1 is a block diagram showing a configuration of position estimation apparatus 100 in the first embodiment.
- the position estimation device 100 includes a sensor unit 101, a wireless processing unit 104, a control unit 105, and a storage unit 114.
- the sensor unit 101 includes an acceleration sensor 102 and a geomagnetic sensor 103
- the control unit 105 includes a terminal information detection unit 106, a wireless intensity measurement unit 110, a distance estimation unit 111, a position estimation unit 112, and a correction unit 113.
- the terminal information detection unit 106 further includes a terminal posture detection unit 107, a movement direction detection unit 108, and a wearing state detection unit 109.
- the sensor unit 101 is an example of a detection unit, and detects the acceleration and direction of the target terminal.
- the acceleration sensor 102 detects the acceleration in the three-axis direction of the target terminal and outputs the acceleration information converted into an electric signal to the terminal information detection unit 106.
- the geomagnetic sensor 103 detects the geomagnetism in the triaxial direction and outputs it to the terminal information detection unit 106 as geomagnetic information converted into an electric signal.
- the wireless processing unit 104 includes an antenna and the like, and has a function of transmitting and receiving wireless signals to communicate with the base station.
- the base station is a device for performing wireless communication with a wireless terminal including a target terminal, and examples thereof include a mobile phone, a PHS master station, and a wireless LAN access point.
- the terminal posture detection unit 107 uses the acceleration information and the geomagnetic information input from the sensor unit 101 to calculate the posture of the target terminal with respect to the gravity direction from the acceleration information, and calculates the posture of the target terminal with respect to the planar rectangular coordinate system from the geomagnetic information. And output to the correction unit 113 as the terminal attitude information of the target terminal.
- the movement direction detection unit 108 determines the movement direction of the target terminal based on the acceleration information and the geomagnetic information input from the sensor unit 101, and outputs the movement direction information to the correction unit 113.
- the terminal posture detection unit 107 and the movement direction detection unit 108 calculate the orientation of the target terminal by using, for example, angular velocity information from the angular velocity sensor in addition to using the geomagnetic information from the geomagnetic sensor. Information and moving directions can also be calculated.
- the terminal posture detection unit 107 detects the posture of the target terminal at the estimated first position using the acceleration and direction of the target terminal.
- the movement direction detection unit 108 is an example of a movement direction determination unit, and determines the movement direction of the target terminal at the estimated first position using the acceleration and direction of the target terminal.
- the wearing state detection unit 109 detects a wearing state indicating in which part of the user the target terminal is worn.
- the wearing state detection unit 109 determines the wearing state by matching the pattern of acceleration information input from the sensor unit 101 with the model pattern of acceleration information in each wearing state stored in the storage unit 114 in advance.
- the information is output to the correction unit 113 as wearing state information.
- the wearing state detection unit 109 is an example of a wearing state determination unit, and determines a wearing state indicating a state in which the target terminal is worn by the user using the acceleration of the target terminal.
- FIG. 4 is an example of model pattern information 400 in a wearing state stored in the storage unit 114.
- the model pattern is composed of acceleration information waveform data, and the field of each model pattern stores the address of the area where the actual waveform data is stored. A model pattern of acceleration information in the wearing state is obtained.
- the accuracy information indicates whether personal data or general data is used as the model pattern.
- the accuracy information is general data in the initial state, and is updated to the principal data by acquiring user information by an application of the target terminal. It is possible to calculate the determination accuracy of the wearing state according to the accuracy information, and change the correction amount in the processing described later according to the determination accuracy.
- the update time can also be used for the purpose of evaluating the determination accuracy, like the accuracy information.
- the principal data is described as more accurate data than the general data.
- FIG. 5 is a specific example of the terminal posture information detected by the terminal posture detecting unit 107, the moving direction information detected by the moving direction detecting unit 108, and the wearing state information detected by the wearing state detecting unit 109.
- the target terminal faces in the direction of gravity, that is, the lower surface faces the ground, faces in the direction indicating north, is worn in the user's breast pocket, and moves toward the south. It has been detected.
- the wireless strength measurement unit 110 measures the received electric field strength of the signal received by the wireless processing unit 104 for each base station.
- the wireless strength measuring unit 110 outputs the measured received electric field strength to the distance estimating unit 111 as received strength information associated with a base station ID for identifying each base station.
- the distance estimation unit 111 estimates the distance between each base station and the target terminal based on the reception strength information input from the wireless strength measurement unit 110 and the transmission strength information stored in the storage unit 114 in advance, The information is output to the position estimation unit 112 and the correction unit 113 as distance information associated with the station ID.
- the distance estimation unit 111 uses the received electric field strength of the signal received by the target terminal from the plurality of base stations communicating with the target terminal, to obtain distance information indicating the distance from each of the plurality of base stations to the target terminal. presume.
- transmission strength information is stored in the storage unit 114 together with data related to the base station used in the processing described later.
- FIG. 6 is an example of the base station management information 600.
- the base station management information 600 is composed of a base station ID record group, and each base station ID record is composed of items of band information, transmission intensity, position information, and update time.
- the base station ID is ID information that uniquely identifies each base station
- the band information indicates a frequency band used by each base station.
- the transmission intensity indicates the transmission power of the radio wave of each base station
- the position information indicates the coordinates (X axis, Y axis, and Z axis in the coordinate system) of each base station.
- the update time is used for purposes such as recording the latest information by comparing the update time when the base station management information 600 is updated.
- FIG. 7 is a specific example of the reception intensity information measured by the wireless intensity measurement unit 110 and the distance information estimated by the distance estimation unit 111.
- the base station IDs “AP-1”, “AP-2” and “AP-3” and the received electric field strengths of the signals transmitted from the respective base stations are “ -49 dBm “,” -60 dBm “, and” -54 dBm ", and the estimated distance information is” 5 m “,” 15 m ", and” 10 m ", respectively.
- the position estimation unit 112 estimates the position of the target terminal (X axis, Y axis, and Z axis) based on the position information of the base station stored in the storage unit 114 and the distance information input from the distance estimation unit 111. .
- the position estimation unit 112 outputs the estimated current position (temporary current position) of the target terminal of the target terminal to the correction unit 113 as a first position (hereinafter also referred to as temporary position information).
- the position estimation unit 112 has a function of estimating the current position of the target terminal based on correction distance information input from the correction unit 113 described later and base station position information.
- the position estimation unit 112 can estimate the position of the target terminal if the position information of at least three base stations and the distance from the base station are obtained.
- the position estimation unit 112 estimates the first position, which is the current position of the target terminal, using the base station information indicating the position of the base station and the estimated distance information. In addition, the position estimation unit 112 further estimates the second position as the current position of the target terminal using the base station information and the corrected distance information.
- the correction unit 113 estimates the distance based on the terminal posture information, the moving direction information and the mounting state information input from the terminal information detection unit 106, the temporary position information input from the position estimation unit 112, and the base station information described above.
- the distance information input from the unit 111 is corrected, and the corrected distance information of the correction result is output to the position estimation unit 112.
- the correcting unit 113 corrects the distance information based on the estimated acceleration and orientation of the target terminal at the first position, the estimated first position, and the base station information.
- the temporary position information and the temporary position information correspond to a first position that is an approximate current position (temporary current position) of the target terminal.
- the correction unit 113 performs correction of distance information again using the second position as the first position. More specifically, when the distance from the first position to the second position is equal to or greater than a predetermined value, the correction unit 113 sets the second position as the first position, and the acceleration and orientation of the target terminal at the first position, The distance information is corrected based on the first position and the base station information. At that time, the position estimation unit 112 estimates the second position as the current position of the target terminal using the base station information and the corrected distance information.
- the terminal posture includes an inclination of the mobile terminal with respect to the horizontal plane and a direction of the mobile terminal on the horizontal plane.
- position with respect to a base station is attitude
- FIG. 8 is an explanatory diagram showing the terminal attitude with respect to the base station.
- the target terminal has a terminal shape with a large front area.
- the wireless terminal may be in the same position depending on the terminal posture with respect to the base station due to the antenna arrangement in the wireless terminal and the influence of antenna directivity. The received electric field strength of the signal transmitted from the base station changes.
- the received electric field strength is measured to be small. It is estimated that the distance between the wireless terminal and the wireless terminal is long.
- the base station “AP-4” is located on the right side of the wireless terminal “Mobile-2”.
- the base station “AP-5” is located in front of the wireless terminal “Mobile-2”. That is, actually, the distance from the base station “AP-4” to the wireless terminal “Mobile-2” is equal to the distance from the base station “AP-5” to the wireless terminal “Mobile-2”. Even if the transmission strengths of the stations “AP-4” and “AP-5” are equal, the reception strengths of the signals received by the wireless terminals are different: “AP-4” is far away and “AP-5” is close. Presumed.
- the position estimation apparatus 100 calculates the terminal attitude of the target terminal with respect to the base station by the process described later, and uses the example of FIG. 9 stored in advance in the storage unit 114, that is, the terminal attitude with respect to the base station and the correction magnification.
- the distance information is corrected by referring to the table 900 shown.
- the correction unit 113 corrects the distance information using the detected terminal attitude, the estimated first position, and the base station information. For example, when the detected terminal attitude, the estimated first position, and the base station information indicate that the attitude of the target terminal with respect to one base station is not front, the correcting unit 113 Correction is performed so that the value of the distance information estimated as the distance from one base station to the target terminal becomes larger than when the posture of the target terminal is the front.
- the value of the correction magnification shown in FIG. 9 is an example, and is not limited to this value.
- FIG. 10 is an explanatory diagram showing the positional relationship between the base station, the wireless terminal, and the user.
- the wireless terminal transmits a radio signal attenuated due to human body interference in addition to attenuation due to the distance from the base station.
- the received electric field strength is measured to be small, and as a result, the distance between the base station and the wireless terminal is estimated to be longer than the actual distance.
- FIG. 10 there is no user (human body) between the base station “AP-6” and the wireless terminal “Mobile-3”.
- a user human body exists between the base station “AP-7” and the wireless terminal “Mobile-3”.
- the distance from the base station “AP-6” to the wireless terminal “Mobile-3” is equal to the distance from the base station “AP-7” to the wireless terminal “Mobile-3”.
- the influence of the reception intensity due to human body interference varies depending on the frequency band used by the base station.
- the frequency is high, the straightness is high and the transparency is low. Therefore, the higher the frequency band used by the base station, the more affected by human interference.
- the position estimation apparatus 100 specifies (calculates) the positional relationship between the base station, the target terminal, and the user by the process described later, and stores the example of FIG.
- the distance information is corrected by referring to the table 1100 indicating the relationship between the positional relationship between the terminal and the user and the correction magnification.
- the correcting unit 113 uses the determined wearing state, the determined moving direction, the estimated first position, and the base station information to determine the positions of the plurality of base stations, the user, and the target terminal.
- the relationship is specified, and the distance information is corrected according to the specified positional relationship. For example, when the specified positional relationship indicates that the user exists between one base station and the target terminal, the correction unit 113 does not exist between the one base station and the target terminal. It correct
- the specified positional relationship indicates that the user exists between one base station and the target terminal and that the target terminal exists in the chest pocket of the user's clothes
- the distance information value estimated as the distance from another base station to the target terminal is corrected to be larger than when the target terminal is held in the user's hand.
- the storage unit 114 stores the model pattern information 400 and the base station management information 600 of the terminal wearing state information.
- the storage unit 114 stores a table 900 indicating the relationship between the terminal attitude and the correction magnification with respect to the base station illustrated in FIG. 9, and a table 1100 indicating the relationship between the correction magnification in the positional relationship between the base station, the terminal, and the user illustrated in FIG. To do.
- FIG. 12 is a flowchart showing the entire operation of the position estimation apparatus 100 in the present embodiment. As shown in FIG. 12, the operation of the position estimation apparatus 100 acquires acceleration information and azimuth information, and detects terminal information (wearing state, moving direction and terminal attitude) (S1201), from the base station to the target terminal.
- terminal information wearing state, moving direction and terminal attitude
- Estimating the distance information indicating the distance to the target terminal (S1202), estimating the temporary position information indicating the temporary position (first position) of the target terminal (S1203), correcting the distance estimated in step 1202
- a step of calculating distance information (S1204), a step of estimating current position information indicating the current position of the target terminal based on the corrected distance information (S1205), and a step of determining whether re-estimation of the current position information is necessary (S1205). S1206).
- FIG. 13 is a flowchart showing details of the terminal information detection operation executed in step S1201. As shown in FIG. 13, the position estimation apparatus 100 first determines whether the target terminal has moved since the previous position estimation from the output of the acceleration sensor 102, and if it has moved, proceeds to the next step (S1301). ).
- the position estimation apparatus 100 If the target terminal has not moved since the previous position estimation, the position estimation apparatus 100 returns the position information estimated at the previous estimation as the current position information to step S1201 and waits until the next estimation.
- the terminal attitude detection unit 107 calculates terminal attitude information based on the acceleration information input from the acceleration sensor 102 and the azimuth information input from the geomagnetic sensor 103 (S1302, S1303, S1304).
- the moving direction detection unit 108 detects the moving direction based on the acceleration information input from the acceleration sensor 102 and the azimuth information input from the geomagnetic sensor 103 (S1305).
- the wearing state detection unit 109 detects the wearing state based on the pattern of acceleration information input from the acceleration sensor 102 and the model pattern of acceleration information in each wearing state stored in advance in the storage unit 114 (S1306). .
- the terminal information of the target terminal shown in FIG. 5 is acquired by the process shown in FIG.
- FIG. 14 is a flowchart showing details of the distance estimation operation executed in step 1202.
- the wireless strength measurement unit 110 first measures the received field strength of signals transmitted from a plurality of base stations, and determines the received strength information that associates the measured received field strength with the base station ID as a distance. It outputs to the estimation part 111 (S1401).
- the distance estimation unit 111 selects the base stations measured by the wireless strength measurement unit 110 in descending order of the received electric field strength (S1402).
- the distance estimation unit 111 determines whether the location information of the base station corresponding to the base station ID indicating the selected base station is stored in the storage unit 114 (S1403). If the location information of the selected base station is stored in the storage unit 114, the process proceeds to step S1404. If the location information of the selected base station is not stored in the storage unit 114, the process returns to step S1402.
- the distance estimation unit 111 estimates the distance from the selected base station to the target terminal based on the reception strength of the signal from the selected base station, and associates the base station ID with the position estimation unit 112 and the correction unit. It outputs to 113 (S1404).
- the distance estimation unit 111 determines whether distance information from the number of base stations necessary for position estimation of the target terminal, that is, three or more base stations has been estimated (S1405). When three or more pieces of distance information can be estimated, the process for estimating the distance information is terminated, and the process proceeds to step S1203. If three or more pieces of distance information cannot be estimated, the process returns to step S1402.
- step S1402 if all the distance information cannot be estimated even if all the base stations measured by the wireless strength measuring unit 110 are selected, the position information of the target terminal cannot be estimated. It returns to step S1201 and waits until the next position estimation time.
- the distance from each base station to the target terminal is estimated by the operation shown in FIG.
- step S1203 the process of estimating the temporary position (first position) of the target terminal in step S1203 will be described.
- step S1202 reception strengths of signals from three base stations “AP-1”, “AP-2”, and “AP-3” are measured, and base stations “AP-1” and “AP-2” are measured.
- the distances from “AP-3” to the target terminal are estimated as L1, L2, and L3, respectively.
- a circle with radius L1 centered on base station “AP-1”, a circle with radius L2 centered on base station “AP-2”, and base station “AP-3” ” Is estimated as a temporary position of the target terminal, and temporary position information indicating the temporary position is output to the correction unit 113.
- the Z coordinates are all assumed to be the same (fixed), but considering the Z coordinates, two intersections of the three spherical surfaces are determined. In that case, it is possible to narrow down to one point by using the fourth distance information or by previously determining the height of the reference target terminal.
- FIG. 15 is a flowchart showing details of the operation for correcting the distance information executed in step S1204.
- the correction unit 113 sequentially selects base stations used by the position estimation unit 112 for position estimation (S1501).
- the correction unit 113 calculates the terminal posture of the target terminal with respect to the base station selected in step S1501 (S1502).
- correction section 113 has a base selected from the target terminal based on the temporary position information input from position estimation section 112 and the base station position information stored in storage section 114. Calculate the direction to the station.
- the correction unit 113 calculates the terminal orientation of the target terminal with respect to the selected base station from the calculated orientation from the target terminal to the selected base station and the terminal orientation input from the terminal information detection unit 106.
- FIG. 16 is a diagram illustrating a calculation result example of the direction from the target terminal to the selected base station, and a calculation result example of the terminal attitude of the target terminal with respect to the base station.
- the orientations of the base stations “AP-1”, “AP-2”, and “AP-3” from the target terminal are calculated as “north”, “south”, and “east”, respectively. This indicates that the terminal postures are calculated as “front”, “back” and “right side”, respectively.
- the correction unit 113 refers to the table 900 indicating the terminal posture with respect to the base station and the correction magnification stored in the storage unit 114 and calculates the correction magnification (S1503). .
- the correcting unit 113 determines whether there is a user between the base station and the target terminal in the positional relationship between the base station selected in step S1501, the target terminal, and the user (S1504).
- the correction unit 113 determines whether the target terminal is mounted on the front surface or the rear surface of the user from the mounting state input from the terminal information detection unit 106.
- the target terminal is determined to be mounted on the front surface of the user, and when the mounting state indicates the rear trouser pocket, the target terminal is the rear surface of the user. It is determined that it is attached.
- the moving direction of the target terminal input from the terminal information detection unit 106 indicates the moving direction of the user, in the present embodiment, the moving direction of the user will be described below as the direction in which the user is facing.
- the correction unit 113 determines that the orientation from the target terminal calculated in step S1502 to the base station selected matches the orientation that the user faces and the target terminal is mounted on the front of the user. It is determined that there is a user between the base station and the target terminal. Further, the correcting unit 113 indicates that the direction from the target terminal calculated in step S1502 to the selected base station is opposite to the direction the user is facing, and the target terminal is mounted on the rear surface of the user It is determined that there is a user between the base station and the target terminal.
- FIG. 17 shows an example of a determination result of whether or not a user exists between the base station and the target terminal.
- the correction unit 113 When there is a user between the base station and the target terminal, the correction unit 113 refers to the table 1100 indicating the positional relationship between the base station and the target terminal user stored in the storage unit 114 and the correction magnification, and sets the correction magnification. Calculate (S1505).
- step S1505 the correction unit 113 performs correction by multiplying the distance information input from the distance estimation unit 111 by the correction magnification calculated in steps S1503 and S1505 (S1506).
- the correcting unit 113 determines whether or not all base stations used for position estimation in step S1501 have been selected. If all the base stations have been selected, the process proceeds to step S1205; otherwise, the process returns to step S1501. (S1507).
- step S1205 the processing in step S1205 will be described.
- step S1205 the position estimation unit 112 estimates the current position of the target terminal based on the correction distance information input from the correction unit 113 and the position information of the base station stored in the storage unit 114.
- the same processing as in step S1203 is performed using the corrected distance information, and the current position of the target terminal is estimated.
- FIG. 18 shows an example of the current position estimated using the corrected distance information.
- the correction unit 113 corrects the distances from the base stations “AP-1”, “AP-2”, and “AP-3” to the terminals to L1 ′, L2 ′, and L3 ′, respectively, in step S1203. It shows that the current position information is estimated at a position that is a distance L away from the estimated temporary position of the target terminal.
- step S1206 the position estimation unit 112 determines whether it is necessary to re-estimate the current position information estimated in step S1205.
- the position estimation unit 112 compares the temporary position information estimated in step S1203 with the current position information estimated in step S1205.
- the position estimation unit 112 determines that re-estimation of the current position information is necessary when the distance L between the two position information is greater than or equal to a predetermined threshold (for example, 3 m), and the estimation is performed in step S1205.
- a predetermined threshold for example, 3 m
- the position estimation apparatus 100 uses the terminal attitude of the target terminal with respect to the base station, the base station, the target terminal, the user, and the distance information estimated from the received electric field strength of the signal from each base station. Correction according to the positional relationship is performed.
- the received electric field strength becomes weak due to the influence of the terminal attitude and the positional relationship, and even when the distance between the base station and the target terminal is estimated to be longer than actual, the base station and the target terminal Can be calculated with higher accuracy, and as a result, the current position of the target terminal can be estimated more accurately.
- Embodiment 2 Hereinafter, the position estimation apparatus according to the second embodiment will be described.
- the distance between the base station and the target terminal is estimated from the received electric field strength of the signal transmitted by the base station, and the current of the target terminal is calculated using the distance from the base station whose position information is known. Estimating the position.
- the second embodiment is different from the first embodiment in that position estimation is performed using an electric field strength map that records the received electric field strength of a signal from a base station that can be received at each position at a constant interval.
- the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
- FIG. 19 is a block diagram showing a configuration of position estimation apparatus 1900 in the second embodiment.
- the position estimation device 1900 has a control unit instead of the control unit 105, the position estimation unit 112, the correction unit 113, and the storage unit 114, as compared with the configuration of the position estimation device 100 of the first embodiment.
- storage part 1904 are comprised, and the distance estimation part 111 is deleted.
- the position estimation unit 1902 estimates temporary position information indicating the temporary position of the target terminal using the reception strength information input from the wireless strength measurement unit 110 and the electric field strength map stored in advance in the storage unit 1904, The data is output to the correction unit 1903.
- the position estimation unit 1902 has a function of estimating the current position of the target terminal based on correction strength information and an electric field strength map input from the correction unit 1903 described later.
- the position estimation unit 1902 uses the reception strength measured by the wireless strength measurement unit 110 and the electric field strength map stored in the storage unit 1904 to measure the reception strength of the current position of the target terminal.
- the first position which is the determined position, is estimated.
- the position estimation unit 1902 further estimates the second position as the current position of the target terminal using the corrected reception intensity and the stored electric field intensity map.
- the first position corresponds to the temporary position, and hereinafter, the first position is also referred to as a temporary position or temporary position information.
- FIG. 20 is a specific example of the electric field strength map 2000.
- the electric field strength map 2000 records the received electric field strength of a base station that can be received for each position at a constant interval.
- the position estimation unit 1902 can estimate the current position of the target terminal by referring to the electric field strength map 2000 using the received electric field strength of each base station.
- the correction unit 1903 Based on the terminal attitude information, the moving direction information and the mounting state information input from the terminal information detection unit 106, the correction unit 1903, based on the temporary position information and the base station position information input from the position estimation unit 1902, The reception intensity information input from the measurement unit 110 is corrected, and the corrected intensity information of the correction result is output to the position estimation unit 1902.
- the correction magnification is set so that the distance is shortened in the first embodiment, in this embodiment, the correction magnification is set so that the reception intensity is increased.
- the storage unit 1904 stores an electric field strength map in which reception strengths of signals received by the target terminal from each of a plurality of base stations that communicate with the target terminal at predetermined intervals are recorded.
- the storage unit 1904 stores the model pattern information 400 in the attached state shown in FIG. 4, the base station management information 600 shown in FIG. 6, and the electric field strength map 2000 shown in FIG.
- the storage unit 1904 stores a table indicating the relationship between the terminal attitude with respect to the base station and the correction magnification, and a table indicating the relationship between the correction magnification in the positional relationship between the base station, the terminal, and the user.
- FIG. 21 is a flowchart showing the overall operation of position estimation apparatus 1900 in the present embodiment.
- the operation of the position estimation device 1900 acquires acceleration information and azimuth information, and detects terminal information (wearing state, moving direction and terminal attitude) (S1201), transmitted from the base station. Measuring the received signal intensity (S2101), estimating the temporary position information indicating the temporary position (first position) of the target terminal (S2102), correcting the received intensity measured in step 2101 and correcting the intensity A step of calculating information (S2103), a step of estimating current position information indicating the current position of the target terminal based on the correction strength information (S2104), and a step of determining whether re-estimation of the current position information is necessary (S1206) ).
- step S1201 performs the same processing as in the first embodiment, description thereof is omitted.
- step S2101 the wireless strength measurement unit 110 measures the received field strength of signals transmitted from a plurality of base stations, and receives the received strength information that associates the measured received field strength and the base station ID with the position estimation unit 1902 and the correction. Output to the unit 1903.
- step S2102 the position estimation unit 1902 obtains temporary position information indicating the temporary position of the target terminal based on the reception strength information input from the wireless strength measurement unit 110 and the electric field strength map stored in the storage unit 1904. Estimate and output to the correction unit 1903.
- FIG. 22 is a flowchart showing details of the complementary operation of the received intensity information executed in step S2103.
- the correction unit 1903 sequentially selects the base stations measured by the wireless strength measurement unit 110 (S2201).
- the correction unit 1903 calculates the terminal posture of the target terminal with respect to the base station selected in step S2201 (S2202).
- the process for calculating the terminal attitude of the target terminal with respect to the base station is the same as the process in step S1502 in the first embodiment.
- the correction unit 1903 calculates the correction magnification by referring to the table indicating the terminal attitude with respect to the base station and the correction magnification stored in the storage unit 1904 (S2203).
- the correction unit 1903 determines whether a user exists between the base station and the target terminal in the positional relationship between the base station selected in step S2201, the target terminal, and the user (S2204). In the positional relationship between the base station, the target terminal, and the user, whether or not there is a user between the base station and the target terminal is determined by performing the same process as that in step S1504 in the first embodiment.
- the correction unit 1903 refers to a table indicating the positional relationship between the base station, the target terminal and the user and the correction magnification stored in the storage unit 1904, and the correction magnification. Is calculated (S2205).
- the correction unit 1903 performs correction by multiplying the reception strength information input from the wireless strength measurement unit 110 by the correction magnification calculated in steps S2203 and S2205 (S2206).
- the correcting unit 1903 determines whether all the base stations measured by the wireless strength measuring unit 110 have been selected. If all the base stations have been selected, the process proceeds to step S2104; otherwise, the process returns to step S2201. (S2207).
- step S2104 the processing in step S2104 will be described.
- step S2104 the position estimation unit 1902 estimates the current position of the target terminal based on the correction intensity information input from the correction unit 1903 and the electric field intensity map stored in the storage unit 114.
- step S2105 the position estimation unit 1902 determines whether it is necessary to re-estimate the current position information estimated in step S2104.
- the position estimation unit 1902 compares the temporary position information estimated in step S2102 with the current position information estimated in step S2104, and the distance L between the two position information is greater than or equal to a predetermined threshold (for example, 3 m). If it is determined that the current position information needs to be re-estimated, the current position information estimated in step S2104 is used as temporary position information, and the process returns to step S2103. If the difference between the distances represented by the two pieces of position information is less than a certain value, the process ends with the current position information estimated in step S2104 as the final position estimation result.
- a predetermined threshold for example, 3 m
- Position estimation apparatus 1900 in the present embodiment performs position estimation of the target terminal with reference to the electric field strength map from the received electric field strength of the signal from each base station.
- the position estimation apparatus 100 and the position estimation apparatus 1900 are described as examples of the configuration of the position estimation apparatus.
- the present invention is not limited to this.
- a distance estimating unit 111, a position estimating unit 112, and a correcting unit 113 may be provided as a minimum configuration of the position estimating device.
- FIG. 23 is a block diagram showing the minimum configuration of the position estimation apparatus according to the present invention.
- FIG. 24 is a flowchart showing the operation of the minimum configuration of the position estimation apparatus according to the present invention.
- the flowchart illustrated in FIG. 24 illustrates a position estimation method in which the minimum configuration of the position estimation apparatus estimates the current position of the wireless terminal. That is, first, distance information indicating a distance from each of the plurality of base stations to the wireless terminal is estimated using reception strengths of signals received by the wireless terminal from a plurality of base stations communicating with the wireless terminal ( S10). Next, the base station information indicating the position of the base station and the estimated distance information are used to estimate a first position that is the current position of the wireless terminal (S20).
- the distance information is corrected based on the acceleration and direction of the wireless terminal detected at the estimated first position, the estimated first position, and the base station information (S30).
- the minimum configuration of the position estimation apparatus estimates the second position as the current position of the wireless terminal using the base station information and the corrected distance information (S40).
- the present invention is not limited to this embodiment. Unless it deviates from the gist of the present invention, one or more of the present invention may be applied to various modifications that can be conceived by those skilled in the art, or forms constructed by combining components in different embodiments. It may be included within the scope of the embodiments. It is also possible to modify the exemplified position estimation device as described below. Examples of such forms will be presented below.
- the base station management information 600 shown in FIG. 6 is stored in advance in the storage unit, but is not limited thereto.
- the base station management information 600 may be stored in, for example, an external storage device, and the base station management information may be acquired by the target terminal communicating as necessary.
- correction is performed by multiplying the correction target distance information and reception intensity information by the correction magnification, but the distance information and reception intensity information correction method is not limited to this. is not.
- correction may be performed by performing addition or subtraction using a table in which a correction amount corresponding to each content is recorded.
- the correction unit 1903 is detected in addition to the determined mounting state of the target terminal, the determined moving direction of the target terminal, and the estimated first position of the target terminal.
- the positional relationship between each of the plurality of base stations, the user, and the target terminal may be specified, and the reception intensity may be corrected according to the specified positional relationship.
- the position estimation device is described as being configured as a target terminal, but is not limited thereto. It may be provided in a server such as a cloud connected to the target terminal via a network.
- Consists of machine language or high-level language program code for causing the processor of the position estimation device and various circuits connected to the processor to execute the distance estimation processing and correction processing described in the above-described embodiment.
- the control program can be recorded on a recording medium, or distributed and distributed via various communication paths.
- a recording medium includes an IC card, a hard disk, an optical disk, a flexible disk, a ROM, a flash memory, and the like.
- the distributed and distributed control program is used by being stored in a memory or the like that can be read by the processor, and each function as shown in each embodiment is performed by the processor executing the control program. It will be realized.
- the processor may be compiled and executed or executed by an interpreter.
- Each functional component shown in the above-described embodiment may be realized as a circuit that executes the function, or may be realized by executing a program by one or a plurality of processors.
- each component may be configured by dedicated hardware or may be realized by executing a software program suitable for each component.
- Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.
- the software that realizes the position estimation device of each of the above embodiments is the following program. That is, the program uses a reception strength of a signal received by the wireless terminal from a plurality of base stations communicating with the wireless terminal, and indicates a distance from each of the plurality of base stations to the wireless terminal.
- a distance estimation step for estimating information a position estimation step for estimating a first position, which is a current position of the wireless terminal, using base station information indicating the position of the base station and the estimated distance information;
- the position estimation apparatus of the present invention may be configured as a package of IC, LSI or other integrated circuit. This package is incorporated into various devices for use, whereby the various devices realize each function as shown in each embodiment.
- each functional block such as a distance estimation unit, a position estimation unit, and a correction unit is typically realized as an LSI that is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
- the name used here is LSI, but it may also be called IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
- the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible.
- An FPGA Field Programmable Gate Array
- a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative other technology, it is naturally also possible to carry out function block integration using this technology. Biotechnology can be applied.
- a position estimation apparatus is a position estimation apparatus that estimates a current position of a wireless terminal, and the reception strength of signals received by the wireless terminal from a plurality of base stations that communicate with the wireless terminal.
- a distance estimation unit that estimates distance information indicating a distance from each of the plurality of base stations to the wireless terminal, and base station information indicating a position of each of the plurality of base stations and the estimated distance information.
- a position estimation unit that estimates a first position that is a current position of the wireless terminal, an acceleration and direction of the wireless terminal at the estimated first position, the estimated first position, and the base station
- a correction unit that corrects the distance information based on the information, and the position estimation unit further uses the base station information and the corrected distance information to determine a second position of the current wireless terminal. It estimated as the location.
- the position estimation device is configured in the wireless terminal, and further includes a detection unit that detects an acceleration and a direction of the wireless terminal.
- the position estimation apparatus further includes an attitude detection unit that detects the attitude of the wireless terminal using the acceleration and orientation of the wireless terminal, The correction unit may correct the distance information using the detected attitude, the estimated first position, and the base station information.
- the terminal attitude of the wireless terminal is calculated based on the acceleration information and the azimuth information, and the distance information is corrected according to the terminal attitude.
- the accuracy of distance information can be increased.
- the position estimation apparatus according to this aspect can similarly increase the accuracy of estimated position information by using highly accurate distance information for position estimation.
- the position estimation device further includes a wearing state indicating a state where the wireless terminal at the estimated first position is worn by a user using the acceleration of the wireless terminal.
- a wearing state determination unit that determines the movement direction determination unit that determines the movement direction of the wireless terminal at the estimated first position using the acceleration and direction of the wireless terminal, and the correction unit includes: Using the determined wearing state, the determined moving direction, the estimated first position, and the base station information, the positional relationship between each of the plurality of base stations, the user, and the wireless terminal And the distance information may be corrected according to the specified positional relationship.
- the correction unit corrects the distance information according to a frequency band used by each of the plurality of base stations for communication with the wireless terminal. Also good.
- the position estimation apparatus is a position estimation apparatus that estimates a current position of a wireless terminal, wherein each of a plurality of base stations that communicate with the wireless terminal at each predetermined interval in advance
- a storage unit that stores an electric field strength map that records reception strength of a signal received by a wireless terminal, a measurement unit that measures reception strength of signals received by the wireless terminal from the plurality of base stations, and a measurement by the measurement unit
- a position estimation unit that estimates a first position that is a current position of the wireless terminal and a position at which the reception intensity is measured, using the received reception strength and the electric field strength map stored in the storage unit;
- a wearing state determination unit that determines a wearing state indicating a state in which the wireless terminal at the estimated first position is worn by a user using the acceleration of the wireless terminal; and an addition of the wireless terminal Using the degree and direction, a movement direction determination unit that determines a movement direction of the wireless terminal at the estimated first position, the determined wearing state, the determined movement direction, and the estimated
- a correction unit that
- the position estimation apparatus can similarly increase the accuracy of the estimated position information by using highly accurate reception intensity for position estimation.
- the processing time for distance estimation and position estimation can be reduced, and the time required for position estimation can be shortened.
- the position estimation device of the present disclosure can be used for various applications such as a mobile phone, a PHS, a wristwatch, and a wireless tag.
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Abstract
Description
以下、本発明の実施の形態について、図面を参照しながら説明する。本発明の位置推定装置100は、例えば、携帯電話などの無線端末に備えられ、該無線端末(以下、対象端末とよぶ。)の現在位置を推定する機能を有する。
図1は、実施の形態1における位置推定装置100の構成を示すブロック図である。図1に示すように、位置推定装置100は、センサ部101、無線処理部104、制御部105および記憶部114を備える。また、センサ部101は、加速度センサ102および地磁気センサ103を備え、制御部105は、端末情報検出部106、無線強度測定部110、距離推定部111、位置推定部112および補正部113を備える。端末情報検出部106は、さらに、端末姿勢検出部107、移動方向検出部108および装着状態検出部109を備える。なお、センサ部101は、検出部の一例であり、対象端末の加速度および方位を検出する。
次に、本実施の形態における位置推定装置100の動作について説明する。
本実施の形態における位置推定装置100は、各基地局からの信号の受信電界強度から推定される距離情報に対して、基地局に対する対象端末の端末姿勢、並びに、基地局と対象端末とユーザとの位置関係に応じた補正を行っている。
以下、実施の形態2の位置推定装置について説明する。実施の形態1では、基地局が送信する信号の受信電界強度から基地局と対象端末との間の距離を推定し、位置情報の分かっている基地局からの距離を用いて、対象端末の現在位置を推定している。実施の形態2では、一定間隔の位置ごとに受信できる基地局からの信号の受信電界強度を記録した電界強度マップを用いて位置推定を行う点において実施の形態1と異なる。実施の形態1と同じ構成要素については同じ符号を用い、説明を省略する。
図19は、実施の形態2における位置推定装置1900の構成を示すブロック図である。図19に示すように、位置推定装置1900は、実施の形態1の位置推定装置100の構成と比較して、制御部105、位置推定部112、補正部113および記憶部114の代わりに制御部1901、位置推定部1902、補正部1903および記憶部1904を備え、距離推定部111を削除した構成である。
次に、本実施の形態における位置推定装置1900の動作について説明する。
本実施の形態における位置推定装置1900は、各基地局からの信号の受信電界強度から電界強度マップを参照して対象端末の位置推定を行っている。
なお、実施の形態1および実施の形態2では、位置推定装置の構成例として位置推定装置100および位置推定装置1900を例示して説明したが、それに限られない。図23に示すように、位置推定装置の最小構成として、距離推定部111、位置推定部112、補正部113を備えていればよい。ここで、図23は、本発明における位置推定装置の最小構成を示すブロック図である。
以下、一態様としての位置推定装置の構成およびその変形例と効果について説明する。
101 センサ部
102 加速度センサ
103 地磁気センサ
104 無線処理部
105、1901 制御部
106 端末情報検出部
107 端末姿勢検出部
108 移動方向検出部
109 装着状態検出部
110 無線強度測定部
111 距離推定部
112、1902 位置推定部
113、1903 補正部
114、1904 記憶部
400 モデルパターン情報
500、700、900、1100、1700 テーブル
600 基地局管理情報
2000 電界強度マップ
Claims (16)
- 無線端末の現在位置を推定する位置推定装置であって、
前記無線端末と交信する複数の基地局から前記無線端末が受信した信号の受信強度を用いて、前記複数の基地局それぞれから前記無線端末までの距離を示す距離情報を推定する距離推定部と、
前記複数の基地局それぞれの位置を示す基地局情報および推定された前記距離情報を用いて、前記無線端末の現在位置である第1位置を推定する位置推定部と、
推定された前記第1位置における前記無線端末の加速度および方位と、推定された前記第1位置と、前記基地局情報とに基づいて、前記距離情報を補正する補正部とを備え、
前記位置推定部は、さらに、前記基地局情報および補正された前記距離情報を用いて、第2位置を前記無線端末の現在位置として推定する
位置推定装置。 - 前記位置推定装置は、前記無線端末に構成されており、
さらに、前記無線端末の加速度および方位を検出する検出部を備える
請求項1に記載の位置推定装置。 - 前記位置推定装置は、さらに、前記無線端末の加速度および方位を用いて前記無線端末の姿勢を検出する姿勢検出部を備え、
前記補正部は、検出された前記姿勢、推定された前記第1位置および前記基地局情報を用いて、前記距離情報を補正する
請求項1または2に記載の位置推定装置。 - 前記補正部は、検出された前記姿勢と推定された前記第1位置と前記基地局情報とにより一の基地局に対する前記無線端末の姿勢が正面でない旨が示される場合には、前記一の基地局に対する前記無線端末の姿勢が正面であるときよりも、前記一の基地局から前記無線端末までの距離として推定された前記距離情報の値が大きくなるよう補正する
請求項1~3のいずれか1項に記載の位置推定装置。 - 前記位置推定装置は、
さらに、前記無線端末の加速度を用いて、推定された前記第1位置における前記無線端末がユーザに装着されている状態を示す装着状態を判定する装着状態判定部と、
前記無線端末の加速度および方位を用いて、推定された前記第1位置における前記無線端末の移動方向を判定する移動方向判定部とを備え、
前記補正部は、判定された前記装着状態と、判定された前記移動方向と、推定された前記第1位置と、前記基地局情報とを用いて、前記複数の基地局それぞれとユーザと前記無線端末との位置関係を特定し、特定した前記位置関係に応じて、前記距離情報を補正する
請求項1~4のいずれか1項に記載の位置推定装置。 - 前記補正部は、特定した前記位置関係により前記ユーザが一の基地局と前記無線端末との間に存在する旨が示される場合には、前記一の基地局と前記無線端末との間にユーザが存在しないときよりも、前記一の基地局から前記無線端末までの距離として推定された前記距離情報の値が大きくなるように補正する
請求項5に記載の位置推定装置。 - 前記補正部は、特定した前記位置関係により、前記ユーザが一の基地局と前記無線端末との間に存在し、かつ、前記無線端末がユーザの服の胸ポケットに存在する旨が示される場合には、前記無線端末がユーザの手に持たれているときよりも、他の基地局から前記無線端末までの距離として推定された前記距離情報の値が大きくなるように補正する
請求項5または6に記載の位置推定装置。 - 前記補正部は、前記複数の基地局それぞれが前記無線端末との交信に利用する周波数帯域に応じて、前記距離情報を補正する
請求項1~7のいずれか1項に記載の位置推定装置。 - 前記位置推定装置は、前記第1位置から前記第2位置までの距離が所定の値以上の場合、前記第2位置を前記第1位置として、前記距離情報の補正をやり直す
請求項1~8のいずれか1項に記載の位置推定装置。 - 前記補正部は、前記第1位置から前記第2位置までの距離が前記所定の値以上の場合、前記第2位置を前記第1位置とし、当該第1位置における前記無線端末の加速度および方位と、当該第1位置と、前記基地局情報とに基づいて、前記距離情報を補正し、
前記位置推定部は、さらに、前記基地局情報および補正された前記距離情報を用いて、前記第2位置を前記無線端末の現在位置として推定する
請求項9に記載の位置推定装置。 - 無線端末の現在位置を推定する位置推定装置であって、
予め一定間隔の位置ごとに前記無線端末と交信する複数の基地局それぞれから前記無線端末が受信した信号の受信強度を記録した電界強度マップを記憶する記憶部と、
前記複数の基地局から前記無線端末が受信した信号の受信強度を測定する測定部と、
前記測定部により測定された受信強度および前記記憶部に記憶されている前記電界強度マップを用いて、前記無線端末の現在位置であり、前記受信強度が測定された位置である第1位置を推定する位置推定部と、
前記無線端末の加速度を用いて、推定された前記第1位置における前記無線端末がユーザに装着されている状態を示す装着状態を判定する装着状態判定部と、
前記無線端末の加速度および方位を用いて、推定された前記第1位置における前記無線端末の移動方向を判定する移動方向判定部と、
判定された前記装着状態と、判定された前記移動方向と、推定された前記第1位置とを用いて、前記複数の基地局それぞれとユーザと前記無線端末との位置関係を特定し、特定した前記位置関係に応じて前記受信強度を補正する補正部と、
を備え、
前記位置推定部は、補正された前記受信強度と記憶されている前記電界強度マップとを用いて、前記第2位置を前記無線端末の現在位置として推定する
位置推定装置。 - 前記位置推定装置は、前記無線端末に構成されており、
さらに、前記無線端末の加速度および方位を検出する検出部を備える
請求項11に記載の位置推定装置。 - 前記位置推定装置は、さらに、前記無線端末の加速度および方位を用いて前記無線端末の姿勢を検出する姿勢検出部を備え、
前記補正部は、さらに、検出された前記姿勢を用いて、前記受信強度を補正する
請求項11または12に記載の位置推定装置。 - 無線端末の現在位置を推定する位置推定方法であって、
前記無線端末と交信する複数の基地局から前記無線端末が受信した信号の受信強度を用いて、前記複数の基地局それぞれから前記無線端末までの距離を示す距離情報を推定する距離推定ステップと、
前記基地局の位置を示す基地局情報および推定された前記距離情報を用いて、前記無線端末の現在位置である第1位置を推定する位置推定ステップと、
推定された前記第1位置における前記無線端末の加速度および方位と、推定された前記第1位置と、前記基地局情報とに基づいて、前記距離情報を補正する補正ステップとを含み、
前記位置推定ステップでは、前記基地局情報および補正された前記距離情報を用いて、第2位置を、前記無線端末の現在位置として推定する
位置推定方法。 - 無線端末の現在位置を推定する位置推定処理をコンピュータに実行させるプログラムであって、
前記無線端末と交信する複数の基地局から前記無線端末が受信した信号の受信強度を用いて、前記複数の基地局それぞれから前記無線端末までの距離を示す距離情報を推定する距離推定ステップと、
前記基地局の位置を示す基地局情報および推定された前記距離情報を用いて、前記無線端末の現在位置である第1位置を推定する位置推定ステップと、
推定された前記第1位置における前記無線端末の加速度および方位と、推定された前記第1位置と、前記基地局情報とに基づいて、前記距離情報を補正する補正ステップとを含み、
前記位置推定ステップでは、前記基地局情報および補正された前記距離情報を用いて、第2位置を、前記無線端末の現在位置として推定する
プログラム。 - 無線端末の現在位置を推定する集積回路であって、
前記無線端末と交信する複数の基地局から前記無線端末が受信した信号の受信強度を用いて、前記複数の基地局それぞれから前記無線端末までの距離を示す距離情報を推定する距離推定部と、
前記複数の基地局それぞれの位置を示す基地局情報および推定された前記距離情報を用いて、前記無線端末の現在位置である第1位置を推定する位置推定部と、
推定された前記第1位置における前記無線端末の加速度および方位と、推定された前記第1位置と、前記基地局情報とに基づいて、前記距離情報を補正する補正部とを備え、
前記位置推定部は、さらに、前記基地局情報および補正された前記距離情報を用いて、第2位置を前記無線端末の現在位置として推定する
集積回路。
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015004971A1 (ja) * | 2013-07-11 | 2015-01-15 | アプリックスIpホールディングス株式会社 | 端末装置、遠隔制御システムおよびその遠隔制御対象決定方法 |
CN105025362A (zh) * | 2014-04-29 | 2015-11-04 | 深圳Tcl新技术有限公司 | 识别用户身份的方法及装置 |
WO2016079911A1 (ja) * | 2014-11-21 | 2016-05-26 | 株式会社Jvcケンウッド | 受信機、通信システム、位置情報補正方法、プログラム、送信機、及び無線信号送信方法 |
WO2016121206A1 (ja) * | 2015-01-29 | 2016-08-04 | アルプス電気株式会社 | 位置検出システム |
JP2016200466A (ja) * | 2015-04-09 | 2016-12-01 | アルパイン株式会社 | 電子装置、位置特定プログラムおよび位置特定方法 |
JP2016206016A (ja) * | 2015-04-23 | 2016-12-08 | ニッタン株式会社 | 位置推定システムおよび位置推定方法 |
JP2017040590A (ja) * | 2015-08-20 | 2017-02-23 | 沖電気工業株式会社 | 距離推定システム、距離推定装置、距離推定方法及び距離推定プログラム |
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WO2019117054A1 (ja) * | 2017-12-13 | 2019-06-20 | 株式会社オートネットワーク技術研究所 | 車載装置、無線端末、位置推定方法及びコンピュータプログラム |
JP2019522187A (ja) * | 2016-06-02 | 2019-08-08 | ノキア テクノロジーズ オーユー | 装置および関連する方法 |
JP2020003507A (ja) * | 2015-04-23 | 2020-01-09 | ニッタン株式会社 | 位置推定システムの構築方法および位置推定システム |
JP2021051092A (ja) * | 2020-12-25 | 2021-04-01 | ニッタン株式会社 | 位置推定システムおよび位置推定方法 |
JP6935043B1 (ja) * | 2021-02-16 | 2021-09-15 | 三菱電機株式会社 | 測位システム、測位用ネットワーク装置、制御回路、記憶媒体および測位方法 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5419895B2 (ja) | 2008-12-26 | 2014-02-19 | パナソニック株式会社 | 通信装置 |
WO2011065028A1 (ja) | 2009-11-30 | 2011-06-03 | パナソニック株式会社 | 通信装置 |
USRE45980E1 (en) | 2009-11-30 | 2016-04-19 | Panasonic Intellectual Property Corporation Of America | Communication device |
US9020432B2 (en) | 2009-11-30 | 2015-04-28 | Panasonic Intellectual Property Corporation Of America | Mobile communication device, communication method, integrated circuit, and program |
US9047759B2 (en) | 2010-11-25 | 2015-06-02 | Panasonic Intellectual Property Corporation Of America | Communication device |
US20150031387A1 (en) * | 2013-07-26 | 2015-01-29 | Texas Instruments Incorporated | Compensation of the signal attenuation by human body in indoor wi-fi positioning |
CN104244182A (zh) * | 2014-09-13 | 2014-12-24 | 北京智谷技术服务有限公司 | 移动设备位置确定方法及确定装置、移动设备 |
US10091015B2 (en) * | 2014-12-16 | 2018-10-02 | Microsoft Technology Licensing, Llc | 3D mapping of internet of things devices |
JP7091733B2 (ja) * | 2018-03-14 | 2022-06-28 | トヨタ自動車株式会社 | 位置推定システム、位置検出方法、およびプログラム |
CN113126132B (zh) * | 2021-04-09 | 2022-11-25 | 内蒙古科电数据服务有限公司 | 一种移动巡检中轨迹校准与分析方法及系统 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005148021A (ja) * | 2003-11-19 | 2005-06-09 | Sony Corp | 動き検出システム |
JP2007151012A (ja) * | 2005-11-30 | 2007-06-14 | Sharp Corp | 通信端末および情報サーバ |
JP2009109241A (ja) * | 2007-10-26 | 2009-05-21 | Yamatake Corp | 位置検出システム及び位置検出方法 |
JP2009188799A (ja) * | 2008-02-07 | 2009-08-20 | Nec Saitama Ltd | 携帯通信端末、受信特性の診断方式、及び、受信特性の診断方法 |
JP2010025738A (ja) * | 2008-07-18 | 2010-02-04 | Yamatake Corp | 位置検出システム及び位置検出方法 |
WO2012070250A1 (ja) * | 2010-11-25 | 2012-05-31 | パナソニック株式会社 | 通信機器 |
JP2012211767A (ja) * | 2011-03-30 | 2012-11-01 | Fujitsu Ltd | 情報処理装置、補正方法、及び補正プログラム |
Family Cites Families (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1084571A (ja) * | 1996-09-06 | 1998-03-31 | Star Kikaku Kk | 構内無線通信システム |
GB2337386B (en) * | 1996-09-09 | 2001-04-04 | Dennis J Dupray | Location of a mobile station |
US6799047B1 (en) * | 1999-02-25 | 2004-09-28 | Microsoft Corporation | Locating and tracking a user in a wireless network through environmentally profiled data |
JP2001349742A (ja) * | 2000-06-07 | 2001-12-21 | Sharp Corp | 歩行者誘導システム及び方法並びにこれに利用される記憶媒体 |
US7127257B2 (en) * | 2001-12-27 | 2006-10-24 | Qualcomm Incorporated | Use of mobile stations for determination of base station location parameters in a wireless mobile communication system |
JP3998501B2 (ja) | 2002-04-05 | 2007-10-31 | 株式会社リコー | 電子掲示板システム |
JP2004048132A (ja) | 2002-07-09 | 2004-02-12 | Toshiba Corp | 視聴装置および視聴方法 |
JP2004166193A (ja) | 2002-09-27 | 2004-06-10 | Matsushita Electric Ind Co Ltd | リモコン装置 |
US6978124B2 (en) * | 2002-12-11 | 2005-12-20 | Motorola, Inc. | Method and mobile station for autonomously determining an angle of arrival (AOA) estimation |
US7257411B2 (en) * | 2002-12-27 | 2007-08-14 | Ntt Docomo, Inc. | Selective fusion location estimation (SELFLOC) for wireless access technologies |
JP2004214923A (ja) * | 2002-12-27 | 2004-07-29 | Hitachi Ltd | 携帯通信端末および携帯通信システム |
JP2004297334A (ja) | 2003-03-26 | 2004-10-21 | Ntt Comware Corp | 位置情報測定端末装置、および無線タグによる位置情報測定方法、ならびにプログラム |
CN100353181C (zh) * | 2003-07-16 | 2007-12-05 | 明基电通股份有限公司 | 地磁辅助无线通信系统定位方法及无线通信定位系统 |
US7751829B2 (en) * | 2003-09-22 | 2010-07-06 | Fujitsu Limited | Method and apparatus for location determination using mini-beacons |
JP4100320B2 (ja) * | 2003-10-14 | 2008-06-11 | 株式会社日立製作所 | 位置検出システムおよび装置 |
US7042391B2 (en) * | 2003-12-12 | 2006-05-09 | Xerox Corporation | Mobile device and method for determining location of mobile device |
JP2006099540A (ja) | 2004-09-30 | 2006-04-13 | Nec Mobiling Ltd | アクセス管理システム、アクセス管理方法及び携帯情報端末 |
JP2006146753A (ja) | 2004-11-24 | 2006-06-08 | Zybox Technology Co Ltd | 移動体通信端末装置、移動体通信方法ならびに移動体通信プログラムおよびこれを記録したコンピュータ読み取り可能な記録媒体 |
JP4492391B2 (ja) * | 2005-03-03 | 2010-06-30 | 沖電気工業株式会社 | 位置測定方法およびそれを用いた位置測定装置 |
WO2006123413A1 (ja) | 2005-05-19 | 2006-11-23 | Fujitsu Limited | 通信システム及び携帯電話端末並びにrfidタグ書込み装置 |
US7848769B2 (en) * | 2005-06-06 | 2010-12-07 | At&T Mobility Ii Llc | System and methods for providing updated mobile station location estimates to emergency services providers |
US8589532B2 (en) * | 2005-06-24 | 2013-11-19 | Qualcomm Incorporated | Apparatus and method for determining WLAN access point position |
JP4721805B2 (ja) | 2005-08-01 | 2011-07-13 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | レベル/周波数変換回路及び方法、a/d変換回路及び方法、信号レベル通知装置及び方法、携帯通信端末 |
RU2390791C2 (ru) * | 2005-11-07 | 2010-05-27 | Квэлкомм Инкорпорейтед | Позиционирование для wlan и других беспроводных сетей |
WO2007069323A1 (ja) | 2005-12-15 | 2007-06-21 | Matsushita Electric Industrial Co., Ltd. | ユーザ登録代行サーバ、通信端末装置、ユーザ登録方法、及びユーザ登録システム |
JP2007304787A (ja) | 2006-05-10 | 2007-11-22 | Hitachi Information & Communication Engineering Ltd | 遠隔操作システム、制御方法、及び、制御プログラム |
JP2007316068A (ja) * | 2006-05-22 | 2007-12-06 | Polaris Wireless Inc | 無線端末の居場所の予測方法 |
JP2008241663A (ja) | 2007-03-29 | 2008-10-09 | Oki Electric Ind Co Ltd | 電界強度調査システムおよび方法 |
JP5070579B2 (ja) | 2007-06-11 | 2012-11-14 | シャープ株式会社 | 情報通信端末および処理プログラム |
JP5194673B2 (ja) | 2007-09-26 | 2013-05-08 | 株式会社日立製作所 | 携帯端末、及び情報の送受信方法 |
US8335173B2 (en) * | 2008-04-11 | 2012-12-18 | Cisco Technology, Inc. | Inserting time of departure information in frames to support multi-channel location techniques |
US8351958B2 (en) | 2008-07-15 | 2013-01-08 | Panasonic Corporation | Mobile device and method for identifying location thereof |
US8892127B2 (en) * | 2008-11-21 | 2014-11-18 | Qualcomm Incorporated | Wireless-based positioning adjustments using a motion sensor |
US20100135178A1 (en) * | 2008-11-21 | 2010-06-03 | Qualcomm Incorporated | Wireless position determination using adjusted round trip time measurements |
US8165150B2 (en) * | 2008-12-17 | 2012-04-24 | Avaya Inc. | Method and system for wireless LAN-based indoor position location |
JP5419895B2 (ja) | 2008-12-26 | 2014-02-19 | パナソニック株式会社 | 通信装置 |
WO2011065028A1 (ja) | 2009-11-30 | 2011-06-03 | パナソニック株式会社 | 通信装置 |
US9020432B2 (en) | 2009-11-30 | 2015-04-28 | Panasonic Intellectual Property Corporation Of America | Mobile communication device, communication method, integrated circuit, and program |
JP2011179946A (ja) * | 2010-03-01 | 2011-09-15 | Doshisha | 位置推定方法および位置推定システム |
US8494566B2 (en) * | 2010-06-01 | 2013-07-23 | Microsoft Corporation | Hybrid mobile phone geopositioning |
JP2012137296A (ja) * | 2010-12-24 | 2012-07-19 | Hitachi Ltd | 携帯端末の測位方法 |
CN102149041A (zh) * | 2010-12-31 | 2011-08-10 | 王斌 | 一种进行空间方位定位和附属信息标注的设备及方法 |
JP5741223B2 (ja) * | 2011-05-31 | 2015-07-01 | 富士通株式会社 | 情報処理装置、補正方法、及び補正プログラム |
JP5873867B2 (ja) | 2011-06-13 | 2016-03-01 | パナソニック インテレクチュアル プロパティ コーポレーション オブアメリカPanasonic Intellectual Property Corporation of America | ノイズパターン取得装置、および、それを備える位置検知装置 |
-
2012
- 2012-09-11 JP JP2013541595A patent/JP5988988B2/ja active Active
- 2012-09-11 WO PCT/JP2012/005742 patent/WO2013065225A1/ja active Application Filing
- 2012-09-11 US US14/342,893 patent/US9372254B2/en active Active
- 2012-09-11 CN CN201280043547.9A patent/CN103782188B/zh active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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Also Published As
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CN103782188B (zh) | 2016-09-28 |
JPWO2013065225A1 (ja) | 2015-04-02 |
CN103782188A (zh) | 2014-05-07 |
US9372254B2 (en) | 2016-06-21 |
US20140213290A1 (en) | 2014-07-31 |
JP5988988B2 (ja) | 2016-09-07 |
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