WO2005012939A1 - 端末位置特定方法及びそのシステム - Google Patents
端末位置特定方法及びそのシステム Download PDFInfo
- Publication number
- WO2005012939A1 WO2005012939A1 PCT/JP2004/010972 JP2004010972W WO2005012939A1 WO 2005012939 A1 WO2005012939 A1 WO 2005012939A1 JP 2004010972 W JP2004010972 W JP 2004010972W WO 2005012939 A1 WO2005012939 A1 WO 2005012939A1
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- WIPO (PCT)
- Prior art keywords
- terminal
- wireless
- radio
- stations
- distance
- Prior art date
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Classifications
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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
Definitions
- the present invention relates to the field of mobile radio communications, and to a method used in determining the geographical location of a mobile station in a mobile communication network.
- An example of a positioning method is a GPS positioning method using a signal from a GPS satellite.
- This system is one of the organizations that are standardizing, and has established the standards for the 3rd General Partnership Project (hereinafter referred to as 3GPP) and the cdmaOne / 2000 standard that define the standards for the W-CDMA system.
- 3GPP2 3rd General Partnership Project 2
- 3GPP2 3rd General Partnership Project 2
- FIG. 1 is a diagram illustrating the principle of the GPS positioning method.
- terminal 5007 measures the reception time of the signal from each of the three GPS satellites 5001 to 5003, and calculates the difference between the transmission time included in the received signal and the measured reception time.
- This is a positioning method in which a circle 5004 5006 is obtained based on the calculated distance between each of the GPS satellites 5001 5003 and the terminal 5007, and the intersection of these three circles is used as the position of the terminal 5007.
- another GPS satellite may be required to synchronize the time between the terminal 5007 and the GPS satellites 5001 to 5003.
- a positioning method using a signal from a base station instead of a signal from a GPS satellite has also been devised.
- An example of a positioning method using a signal from a base station is Observed Time Difference Of Arriaval positioning (hereinafter referred to as OTDOA positioning). This method is a positioning method standardized by 3GPP.
- FIG. 2 is a diagram illustrating the principle of OTDOA positioning.
- terminal 5106 measures the reception time of the signal from each of three base stations 5101 5103, and calculates the difference between the reception times of the signals from the respective base stations, and calculates the difference between the reception times of the base stations.
- This is a positioning method in which hyperbolas 5104 and 5105 are obtained based on a difference in distance between the terminal 5106 and the terminal 5106, and the turn of the two hyperbolas is set as the position of the terminal 5106. Note that the difference between the reception times measured by terminal 5106 is corrected by the transmission timing difference when the transmission timing of the signal from the base station is not synchronized.
- AFLT positioning Forward Link Triangulation positioning
- FIG. 3 is a diagram showing the principle of AFLT positioning.
- Terminal 5207 measures the reception time of the signal from each of the three base stations 5201-5207, and calculates the difference between the transmission time included in the received signal and the measured reception time. This is a positioning method in which circles 5204 to 5206 are obtained based on the distance between each of the base stations 5201 to 5207 and the terminal 5007, and the intersection of these three circles is set as the position of the terminal 5207.
- FIG. 4 is a diagram showing the principle of a positioning method using both signals from GPS satellites and signals from base stations.
- terminal 5307 measures signal 1J when receiving signals from each of two GPS satellites 5301 and 5302, and determines whether the difference between the transmission time included in the received signal and the measured reception time.
- the circles 5304 and 5305 are obtained based on the distance between each of the GPS satellites 5301 and 5302 and the terminal 5307 calculated from the distance.
- the reception time of the signal from the base station 5303 is measured, and the distance between each of the base stations 5303 and the terminal 5307 calculated from the difference between the transmission time included in the received signal and the measured reception time is calculated.
- yen 5306 This is a positioning method where the intersection of these three circles is the position of the terminal 5007.
- Another GPS satellite may be required.
- the conventional positioning method described above requires signals from three or more base stations or three or more GPS satellites, the number of measurable base stations and GPS satellites is limited. In an environment with only a total power station, the intersection force of the quadratic curve was generated, so the terminal position could not be narrowed down, and the terminal position could not be specified with high accuracy.
- the present invention has been made in view of the above problems, and has as its object to provide a highly accurate measurement even in an environment having only measurable base stations and a total power station with the number of GPS satellites.
- An object of the present invention is to provide a terminal position specifying method and a system for specifying a terminal position.
- a first invention for solving the above-mentioned problems of the present invention is a signal transmission method between two radio stations whose geographical positions are known and whose geographical positions are different, and a radio terminal whose geographical position is unknown.
- a terminal position specifying method for specifying the geographical position of the wireless terminal by transmitting / receiving the wireless terminal, wherein two curves are obtained by using a propagation time of a wireless signal between the two wireless stations and the wireless terminal.
- a second invention for solving the above-mentioned problem of the present invention is a signal processing method for two radio stations whose geographical positions are known and whose geographical positions are different from each other and a radio terminal whose geographical position is unknown.
- a terminal position specifying method for specifying the geographical position of the wireless terminal by transmitting / receiving the wireless terminal, wherein two curves are obtained by using a propagation time of a wireless signal between the two wireless stations and the wireless terminal.
- the direction of the straight line connecting each of the two candidate points and the first wireless station is compared with the direction of arrival, and the candidate point at which the direction of arrival and the direction of the straight line match is determined.
- Specifying the geographical position of the wireless terminal is Specifying the geographical position of the wireless terminal.
- the third invention for solving the above-mentioned problems of the present invention is a signal processing method for two radio stations whose geographical positions are known and whose geographical positions are different from each other, and a radio terminal whose geographical position is unknown.
- a fourth invention for solving the above-mentioned problem of the present invention is a wireless terminal, a wireless station, a fixed network to which at least one of the wireless stations is connected, and other necessary devices connected to the fixed network.
- the radio terminal transmits and receives signals between two radio stations whose geographical positions are known and whose geographical positions are different, and a radio terminal whose geographical position is unknown.
- the wireless terminal measures the electric field strength of a signal received from one of the two wireless stations, and the electric field strength is stored in either the device or the base station or the terminal; Received electric field intensity information in which the electric field intensity of a signal from the radio station measured at a plurality of measurement points within the communication range of the radio station and the geographical position of the measurement point are associated. Information, the geographical position of the measurement point is identified, and the geographical position of the measurement point is identified. Identifying a point as the geographical location of the wireless terminal;
- a fifth invention for solving the above-mentioned problems of the present invention is a wireless terminal, a wireless station, a fixed network to which at least one of the wireless stations is connected, and other necessary devices connected to the fixed network.
- the mobile communication network configured by the above, by transmitting and receiving signals between two wireless stations whose geographical positions are known and whose geographical positions are different and a wireless terminal whose geographical position is unknown, A terminal position specifying method for specifying the geographical position,
- Two curves are drawn using the propagation time of the radio signal between the two radio stations and the radio terminal, and two intersections of the two curves are defined as two candidates of the geographical position of the radio terminal. Estimating a point and
- the wireless terminal measures the propagation condition of a signal received from one of the two wireless stations, and determines the propagation condition and the signal held in the device, the wireless station, or the wireless terminal. A comparison is made between the propagation state of the signal from the wireless station measured at a plurality of measurement points within the communication range of the station and the propagation state information associated with the geographical position of the measurement point. Determining the geographical position of the measurement point having a propagation situation close to the propagation situation measured by the wireless terminal, and identifying the candidate point close to the geographical location of the identified measurement point to the wireless terminal. Identifying the location as a geographical location.
- a sixth invention for solving the above-mentioned problems of the present invention is a wireless terminal, a wireless station, a fixed network to which at least one of the wireless stations is connected, and other necessary devices connected to the fixed network.
- the wireless terminal has a function of measuring terrestrial magnetism, two radio stations whose geographical positions are known and whose geographical positions are different, and the geographical position is unknown
- a terminal position specifying method for specifying the geographical position of the wireless terminal by transmitting / receiving a signal to / from a wireless terminal,
- Two curves are drawn using the propagation times of the radio signals between the two radio stations and the radio terminal, and two intersections of the two curves are defined as two candidate points of the geographical position of the radio terminal.
- the wireless terminal measures the terrestrial magnetism, and the terrestrial magnetism is measured at a plurality of measurement points within the communication range of the wireless station held by the device or the wireless station or the wireless terminal.
- geomagnetism information in which geomagnetism is associated with the geographic location of the measurement point, the geographic location of the measurement point associated with a value of geomagnetism close to the geomagnetism is specified, Identifying the candidate point close to the geographical position of the measured point as the geographical position of the radio terminal.
- a seventh invention for solving the above-mentioned problems of the present invention is a signal transmission method for two radio stations whose geographic locations are known and whose geographic locations are different from each other and a radio terminal whose geographic location is unknown.
- An eighth invention for solving the above-mentioned problems of the present invention is a wireless terminal, a wireless station, a fixed network to which at least one of the wireless stations is connected, and other necessary devices connected to the fixed network.
- the mobile terminal has a function of measuring altitude, two radio stations whose geographical positions are known and whose geographical positions are different, and the geographical position is unknown.
- a terminal position specifying method for specifying the geographical position of the wireless terminal by transmitting / receiving a signal to / from a wireless terminal,
- the altitude measured by the wireless terminal is associated with the altitude information of a point held in the device, the wireless station, or the wireless terminal, which is a communication range of the wireless station, and a geographical position.
- the altitude information is compared with the altitude information of the candidate point, and a candidate point holding the altitude information close to the measured altitude is set as the position of the wireless terminal. Identifying step.
- a ninth invention for solving the above-mentioned problems of the present invention is a wireless terminal, a wireless station, a fixed network to which at least one of the wireless stations is connected, and other necessary devices connected to the fixed network.
- the mobile communication network configured by the above, by transmitting and receiving signals between two wireless stations whose geographical positions are known and whose geographical positions are different and a wireless terminal whose geographical position is unknown, A terminal position specifying method for specifying the geographical position,
- Two curves are drawn using the propagation times of the radio signals between the two radio stations and the radio terminal, and two intersections of the two curves are defined as two candidate points of the geographical position of the radio terminal. And comparing each of the candidate points with positioning history information in which the position when any of the device, the base station, and the wireless terminal previously identified the position of the wireless terminal is held, and Identifying the candidate point as the position of the wireless terminal, which is held in the history information, close to the position of the wireless terminal.
- a tenth invention for solving the above-mentioned problems of the present invention is a communication between two radio stations whose geographic positions are known and whose geographic positions are different from each other and a first wireless terminal whose geographic position is unknown.
- Two curves are drawn using the propagation times of the radio signals between the two radio stations and the first radio terminal, and two intersections of the two curves are used to determine the geographical position of the radio terminal.
- Two candidate points Two candidate points,
- the wireless terminal communicates with the same wireless station, compares the geographical position of the second wireless terminal whose geographical position is known with the candidate point, and Identifying the candidate point near the geographical location of the first wireless terminal as the geographical location of the first wireless terminal.
- An eleventh invention for solving the above-mentioned problems of the present invention is a radio terminal, a radio station, a fixed network to which at least one of the radio stations is connected, and other necessary devices connected to the fixed network.
- the wireless terminal has an imaging function, two radio stations whose geographical positions are known and whose geographical positions are different, and a radio whose geographical position is unknown.
- Two curves are drawn using the propagation times of the radio signals between the two radio stations and the first radio terminal, and two intersections of the two curves are used to determine the geographical position of the radio terminal.
- Two candidate points Two candidate points,
- the wireless terminal uses the imaging function to take an image of the exterior of a surrounding building, and the captured external appearance is held in the device, the wireless station, or the wireless terminal, and Comparing the appearance information of a building in the communication area of the station with a candidate point where the photographed appearance matches the appearance information as the position of the wireless terminal.
- a twelfth invention for solving the above-mentioned problems of the present invention is a radio terminal, a radio station, a fixed network to which at least one of the radio stations is connected, and other necessary devices connected to the fixed network.
- the mobile communication network configured by the above, by transmitting and receiving signals between two wireless stations whose geographical positions are known and whose geographical positions are different and a wireless terminal whose geographical position is unknown, A terminal position specifying method for specifying the geographical position,
- Two curves are drawn using the propagation times of the radio signals between the two radio stations and the first radio terminal, and two intersections of the two curves are used to determine the geographical position of the radio terminal.
- Two candidate points Two candidate points,
- a thirteenth invention for solving the above-mentioned problems of the present invention is the invention according to any one of the first to twelfth inventions, which further includes a step of obtaining two candidate points.
- the step of obtaining two candidate points means that two curves are drawn using the propagation time of a radio signal between the two radio stations and the radio terminal, and the intersection of the two curves is drawn.
- Two curves are drawn using two times as two candidate points of the geographical position of the wireless terminal and a propagation time of a wireless signal between the two wireless stations and the wireless terminal. Estimating two intersections of the curve as two candidate points of the geographical position of the wireless terminal.
- a fourteenth invention for solving the above-mentioned problems of the present invention is the invention according to any one of the first to thirteenth inventions, wherein in the step of obtaining two candidate points, one of the two radio stations and the radio station
- a first distance is obtained from the time, and the propagation distance is measured from a first circle centered on the geographical position of the first wireless station, the radius of which is the first distance, and the propagation time difference.
- the calculated first distance difference is obtained, and two intersections with a hyperbola whose distance difference from the two wireless stations is the first distance difference are defined as the two candidate points of the wireless terminal.
- a fifteenth invention for solving the above-mentioned problems of the present invention in any one of the first to fourteenth inventions, comprises at least one of the wireless terminals and at least two base stations, One base station forms a plurality of communication ranges, and in a mobile communication network in which the base station and the wireless terminal existing in the communication range perform wireless communication,
- the two radio stations are the base stations.
- the wireless terminal receives a signal from a GPS satellite.
- One of the wireless stations is the base station and the other is the GPS satellite.
- the seventeenth invention for solving the above-mentioned problems of the present invention is directed to any one of the first to sixteenth inventions.
- the wireless terminal has a function of receiving a signal from a GPS satellite, and the wireless station is a GPS satellite.
- An eighteenth aspect of the present invention for solving the above-mentioned problems of the present invention is a signal processing method for two radio stations whose geographical positions are known and whose geographical positions are different from each other and a radio terminal whose geographical position is unknown.
- a terminal position specifying system that specifies the geographical position of the wireless terminal by transmitting and receiving, and draws two curves using a propagation time of a wireless signal between the two wireless stations and the wireless terminal.
- a communication range of at least one of the two radio stations is specified, and a candidate point included in the communication range among the two candidate points is specified as a geographical position of the radio terminal.
- a second functional block is specified.
- a nineteenth invention for solving the above-mentioned problems of the present invention is a signal transmission method between two radio stations whose geographical positions are known and whose geographical positions are different and a radio terminal whose geographical position is unknown.
- a terminal location specifying system that specifies the geographical position of the wireless terminal by transmitting and receiving, and draws two curves by using a propagation time of a wireless signal between the two wireless stations and the wireless terminal;
- a first functional block for calculating two intersections of the two curves as two candidate points of the geographical position of the wireless terminal;
- the arrival direction of the signal when the signal of the wireless terminal power is received by the first wireless station is specified, and the direction of a straight line connecting each of the two candidate points and the first wireless station and the arrival direction are determined.
- a second functional block that compares the direction of arrival and the candidate point where the direction of arrival and the direction of the straight line match as a geographical position of the wireless terminal.
- a twentieth invention for solving the above-mentioned problems of the present invention is a signal processing method for two radio stations whose geographic locations are known and whose geographic locations are different from each other and a radio terminal whose geographic location is unknown.
- a terminal position specifying system for specifying the geographical position of the wireless terminal by transmission / reception, wherein two curves are provided by using a propagation time of a wireless signal between the two wireless stations and the wireless terminal.
- a first functional block for calculating two intersections of the two curves as two candidate points of the geographical position of the wireless terminal;
- the arrival direction of the signal when the wireless terminal receives each of the force signals of the two wireless stations is specified as an angle of arrival, and a straight line connecting the candidate point and one of the two wireless stations and the candidate point are determined.
- An angle between a straight line connecting the other of the two radio stations and the straight line is calculated as a candidate point angle for each candidate point, and the difference between the arrival angles and each of the candidate point angles is compared to calculate the angle of arrival.
- a twenty-first invention for solving the above-mentioned problems of the present invention is a wireless terminal, a wireless station, a fixed network to which at least one of the wireless stations is connected, and other necessary devices connected to the fixed network.
- the radio terminal transmits and receives signals between two radio stations whose geographical positions are known and whose geographical positions are different, and a radio terminal whose geographical position is unknown.
- a terminal location specifying system for specifying the geographical position of the radio station, wherein the electric field strength of a signal from the radio station measured at a plurality of measurement points within a communication range of the radio station;
- a storage function block storing received electric field strength information associated with the geographical position of
- the wireless terminal measures the electric field strength of a signal received from one of the two wireless stations, compares the electric field strength with the stored received electric field strength information, and obtains a value close to the electric field strength.
- a second functional block that specifies the geographical position of the measurement point associated with the wireless terminal, and specifies the candidate point close to the specified geographical position of the measurement point as the geographical position of the wireless terminal. .
- a twenty-second invention for solving the above-mentioned problems of the present invention is a radio terminal, a radio station, a fixed network to which at least one of the radio stations is connected, and other necessary devices connected to the fixed network. And the geographical position is known and the geographical position is different.
- Two curves are drawn using the propagation times of the radio signals between the two radio stations and the radio terminal, and two intersections of the two curves are defined as two candidate points of the geographical position of the radio terminal. And the first functional block
- the propagation state information of the signal from the wireless station measured at the plurality of measurement points and the propagation state information relating the geographical position of the measurement point are stored.
- the wireless terminal measures the propagation condition of a signal received from one of the two wireless stations, compares the propagation condition with the propagation condition information, and determines a propagation condition close to the propagation condition measured by the wireless terminal.
- a second functional block for specifying the geographical position of the measurement point having the following, and specifying the candidate point close to the geographical position of the specified measurement point as the geographical position of the wireless terminal.
- a twenty-third invention for solving the above-mentioned problems of the present invention comprises a radio terminal, a radio station, a fixed network to which at least one of the radio stations is connected, and other necessary devices connected to the fixed network.
- a mobile communication network transmission and reception of signals between two wireless stations whose geographical positions are known and whose geographical positions are different and a wireless terminal whose geographical position is unknown,
- a terminal location identifying system for identifying a location,
- a wireless terminal having a first functional block for measuring geomagnetism
- Two curves are drawn using the propagation times of the radio signals between the two radio stations and the radio terminal, and two intersections of the two curves are defined as two candidate points of the geographical position of the radio terminal. And geomagnetic information associated with the geomagnetism measured at a plurality of measurement points within the communication range of the wireless station and the geographical position of the measurement point.
- a memory function block
- the twenty-fourth invention for solving the above-mentioned problems of the present invention is a transmission / reception of signals between two radio stations whose geographic locations are known and whose geographic locations are different from each other and a radio terminal whose geographic location is unknown.
- a terminal location specifying system for determining the geographical position of the wireless terminal by using the propagation time of a wireless signal between the two wireless stations and the wireless terminal to draw two curves,
- a first functional block for calculating two intersections of the two curves as two candidate points of the geographical position of the wireless terminal;
- a second function block for specifying the other candidate point as the geographical position of the wireless terminal. With a lock.
- a twenty-fifth invention for solving the above-mentioned problems of the present invention is a wireless terminal, a wireless station, a fixed network to which at least one of the wireless stations is connected, and other necessary devices connected to the fixed network.
- the mobile communication network configured by the above, by transmitting and receiving signals between two wireless stations whose geographical positions are known and whose geographical positions are different and a wireless terminal whose geographical position is unknown,
- a terminal position specifying system for specifying the geographical position
- a wireless terminal having a first functional block for measuring altitude
- a storage function block in which altitude information of a point which is a communication range of the radio station and altitude information associated with a geographical position are stored;
- the altitude measured by the wireless terminal is compared with the altitude information of the candidate point in the altitude information, and a candidate point holding the altitude information close to the measured altitude is determined by the wireless terminal. And a third functional block specified as a position.
- a twenty-sixth invention for solving the above-mentioned problems of the present invention provides a radio terminal, a radio station, a fixed network to which at least one of the radio stations is connected, and other necessary devices connected to the fixed network.
- a terminal position specifying system for specifying the geographical position A terminal position specifying system for specifying the geographical position
- a storage function block for storing positioning history information in which the position when any of the device, the base station, and the wireless terminal previously specified the position of the wireless terminal is stored; and the two wireless stations Two curves are drawn using the propagation time of the wireless signal between the wireless terminal and the wireless terminal, and two intersections of the two curves are calculated as two candidate points of the geographical position of the wireless terminal.
- a second functional block that compares each of the candidate points with the positioning history information and identifies the candidate point close to the position of the wireless terminal held in the positioning history information as the position of the wireless terminal; Have.
- the twenty-seventh invention for solving the above-mentioned problems of the present invention provides a radio communication system comprising two radio stations whose geographical positions are known and whose geographical positions are different from each other and a first radio terminal whose geographical position is unknown
- a terminal position specifying system for specifying the geographical position of the wireless terminal by transmitting / receiving a signal
- Two curves are drawn using the propagation times of the radio signals between the two radio stations and the first radio terminal, and two intersections of the two curves are used to determine the geographical position of the radio terminal.
- a first functional block calculated as two candidate points,
- the wireless terminal communicates with the same wireless station, compares the geographical position of the second wireless terminal whose geographical position is known with the candidate point, and And a second function block for specifying the candidate point close to the geographical position of the first wireless terminal as the geographical position of the first wireless terminal.
- a twenty-eighth invention for solving the above-mentioned problems of the present invention is a wireless terminal, a wireless station, a fixed network to which at least one of the wireless stations is connected, and other necessary devices connected to the fixed network.
- the mobile communication network configured by the above, by transmitting and receiving signals between two wireless stations whose geographical positions are known and whose geographical positions are different and a wireless terminal whose geographical position is unknown,
- a terminal position specifying system for specifying the geographical position
- a wireless terminal having imaging means
- a storage function block in which appearance information of a building in a communication area of the wireless station and its geographical position are stored in association with each other;
- a first functional block that draws two curves, and calculates two intersections of the two curves as two candidate points of the geographical position of the wireless terminal;
- the appearance of the building photographed by the imaging means of the wireless terminal is compared with the appearance information associated with the candidate point in the appearance information, and the photographed appearance matches the appearance information.
- a second functional block for specifying a candidate point as the position of the wireless terminal is specified.
- a twenty-ninth invention for solving the above-mentioned problems of the present invention provides a radio terminal, a radio station, a fixed network to which at least one of the radio stations is connected, and other necessary devices connected to the fixed network.
- a radio terminal for solving the above-mentioned problems of the present invention
- a radio station for transmitting and receiving signals between two wireless stations whose geographical positions are known and whose geographical positions are different and a wireless terminal whose geographical position is unknown
- a terminal position specifying system for specifying the geographical position by transmitting and receiving signals between two wireless stations whose geographical positions are known and whose geographical positions are different and a wireless terminal whose geographical position is unknown.
- a storage function block in which arrangement information of a building within a communication range of the wireless station is stored; and two curves using a propagation time of a wireless signal between the two wireless stations and the first wireless terminal. And a first functional block for calculating two intersections of the two curves as two candidate points of the geographical location of the wireless terminal;
- a second functional block that identifies the location of the terminal Based on the location information, the influence of the shielding of the building is estimated, and if one of the candidate points cannot receive a signal from at least one of the wireless stations, the other candidate point is replaced with the wireless station.
- a thirtieth invention for solving the above-mentioned problems of the present invention is a function for calculating the two candidate points, which can measure a propagation time of a radio signal between the radio station and the radio terminal. Calculating a first distance from the propagation time between the first wireless station and the wireless terminal, centering on a geographical position of the first wireless station, and defining a radius as the first distance A second distance is determined from the propagation time between the first circle and the second wireless station and the wireless terminal, and the radius is set at the center of the geographical position of the second wireless station. Two intersections with the second circle as the second distance are calculated as the two candidate points.
- the functional block for calculating two candidate points includes two wireless stations and two wireless terminals.
- a thirty-first invention for solving the above-mentioned problem of the present invention is a function of calculating the two candidate points, measuring a propagation time of a radio signal between one of the two radio stations and the radio terminal.
- a first distance is obtained from the propagation time, and the propagation time is calculated.
- the first circle whose radius is the first distance and the first distance difference calculated from the propagation time difference are determined with respect to the geographical position of the first wireless station where Two intersections with a hyperbola whose distance difference from the radio station is the first distance difference are calculated as the two candidate points of the wireless terminal.
- a thirty-second invention for solving the above-mentioned problems of the present invention comprises at least one wireless terminal and at least two base stations, wherein one base station forms a plurality of communication ranges.
- one base station forms a plurality of communication ranges.
- two wireless stations are the base stations.
- a thirty-third invention for solving the above-mentioned problems of the present invention is the mobile communication network, wherein the wireless terminal has means for receiving a signal from a GPS satellite, and one of the radio stations is connected to the base station. Station and the other is the GPS satellite.
- the wireless terminal has a functional block for receiving a signal from a GPS satellite, and the wireless station is a GPS satellite.
- a hyperbola is obtained from the difference between the reception time of the signal from the base station at the terminal and the reception time of the signal from the base station, and a circle is obtained from the round-trip propagation time between the base station and the terminal. The intersection of the hyperbolic line and the circle is calculated, and two candidate points are obtained. Since the terminal is located in the sector, a candidate point existing within the sector is specified as the terminal position.
- FIG. 6 is a drawing schematically showing a mobile communication network.
- the mobile communication network includes a terminal 21, a base station 22, a base station 23, a fixed network 24, and an RNC 25.
- the terminal 21 When performing communication, the terminal 21 establishes a connection with the RNC 25 via a wireless link established with the base station 22 or the base station 23.
- the base station 22 and the base station 23 are connected to a fixed network 24 and are controlled by the RNC 25.
- the base stations 22 and 23 form a plurality of communication areas (hereinafter, referred to as sectors) .
- the base station 22 includes sectors 26, 27, 28, and the base station 23 includes sectors 29, 210, 211.
- each sector is distinguished by a scramble ring 'code.
- the base stations 22 and 23 continuously transmit, as a pilot signal, a signal obtained by scrambling a predetermined signal with a scramble ring 'code given to each sector to each of its own sectors. .
- FIG. 7 is a diagram showing a flow of processing until a connection is established between the terminal 21 and the RNC 25.
- the terminal 21 When establishing a connection between the terminal 21 and the RNC 25, the terminal 21 requests information necessary for establishing a connection from the RNC 25 (step 71). At this time, the terminal ID of the terminal 21 (“0901234567” in the present embodiment) and the scrambling 'code number used by the sector in which the terminal 21 is located (“178” in the present embodiment) ) Is notified to RNC25.
- RNC 25 receives the request from terminal 21, RNC 25 generates terminal information 30 by associating the terminal ID reported at the same time with the request and the scrambling 'code number used by the sector in which terminal 21 is located. Yes (step 72).
- FIG. 8 is a diagram showing the terminal information 30 generated by the RNC 25.
- the terminal information 30 holds the terminal ID 31a-31 ⁇ unique to the terminal establishing the connection and the scrambling 'code number 32a used by the sector in which the terminal is located in association with each other. Generated when terminal 21 establishes a connection with RNC 25
- the RNC 25 that has completed the generation of the terminal information requests the base station 22 forming the sector 27 to establish a radio link with the terminal 21 (step 73).
- the base station 22 requested to establish a radio link secures resources and sets various parameters for a new radio link (step 74). Note that the details of the processing performed by the base station 22 have no direct relationship with the description of the present embodiment, and thus the detailed description is omitted.
- the base station 22 that has completed the securing of resources and the setting of various parameters notifies the RNC 25 of the establishment of a radio link (step 75).
- RNC 25 After confirming that the radio link has been established, RNC 25 notifies terminal 21 of information necessary for establishing a connection (step 76). Note that the details of the information necessary for establishing the connection have no direct relation to the description of the present embodiment, and thus a detailed description is omitted.
- the terminal 21 that has received the information necessary for establishing a connection from the RNC 25 establishes a connection based on the received information (Step 77). Note that the details of the processing performed by the terminal 21 at the time of establishing a connection have no direct relation to the description of the present embodiment, and thus a detailed description is omitted.
- the terminal 21 When the establishment of the connection is completed, the terminal 21 notifies the RNC 25 of the information of the established connection (Step 78).
- terminal information 30 is generated when terminal 21 requests information necessary for establishing a connection from RNC 25.
- this procedure is one example.
- the terminal information 30 may be generated when there is a notification from the terminal 21 that the connection has been established.
- FIG. 9 is a diagram showing a flow of processing when terminal information 30 is generated when a notification of connection establishment completion is received from the terminal 21.
- the terminal information 30 is used by the sector where the terminal is located for each terminal ID. It is also conceivable to arrange terminal IDs for each of the scrambling ring's code numbers.
- FIG. 10 shows terminal information when terminal IDs are arranged for each scramble ring 'code number.
- FIG. 11 is a diagram showing an example of the base station information 40 held by the RNC 25.
- the information of the base station is held by associating the following information with the base station ID 41a 41 ⁇ unique to the base station.
- the latitude 42a and the longitude 43a indicate the geographical position of the base station of the base station ID 41a.
- the scrambling 'code 44a_l-44a_X indicates the scrambling' code number used by each sector formed by the base station with the base station ID 41a.
- the center direction 45a_l-45a_X of the sector indicates an angle with respect to the true north of the center direction of the sector formed by the base station with the base station ID 41a.
- the base station information 40 shown in Fig. 11 is one example, and it is conceivable that information is provided for each sector.
- FIG. 12 is a diagram showing base station information 40-2 when information is provided for each sector.
- Latitude 3502an and longitude 3503an indicate the position of the antenna forming the sector.
- the direction of the sector can be expressed by using the starting angle of the force sector in which the direction of the sector is expressed by the center direction of the sector.
- FIG. 13 is a diagram showing a configuration diagram of the RNC 25. As shown in FIG. The configuration diagram shows only the configuration related to the present embodiment.
- Base station I / F section 501 is an interface with a plurality of base stations connected to RNC 25.
- the NBAP message processing unit 502 has a function of processing a message exchanged between the RNC 25 and the base station, and sends a message to the base station according to the control of the connection control unit 504 and the positioning sequence control unit. To notify the connection control unit 504 and the positioning sequence control unit of the reception of the message from the base station.
- the RRC message processing unit 503 transmits a message to the terminal under the control of the connection control unit 504 and the positioning sequence control unit 505, and notifies the connection control unit 504 and the positioning sequence control unit of the reception of the message from the terminal.
- the connection control unit 504 has a function of controlling a connection established between the terminal and the RNC 25, and performs communication with the base station via the NBAP message processing unit 502.
- the terminal communicates with the terminal via the RRC message processing unit 503. Further, when the connection is established, the terminal information 30 is generated, and the generated terminal information 30 is stored in the database 507.
- Positioning sequence control section 505 has a function of controlling a procedure for specifying the position of the terminal, communicates with the base station via NBAP message processing section 502, and performs RRC message processing.
- the terminal communicates with the terminal via the unit 503. Further, it has a function of notifying the arithmetic processing unit 506 of the measurement results received from the terminal and the base station. Further, the database 507 is referred to in order to generate information (hereinafter referred to as auxiliary information) necessary for measurement for the terminal or the base station.
- Arithmetic processing section 506 performs arithmetic processing for specifying the position of the terminal based on the measurement results at the terminal and the base station notified from the positioning sequence control section. If it is necessary to refer to the terminal information 30 or the base station information 40 when specifying the position of the terminal, the database 507 is referred to.
- the database 507 holds the terminal information 30 notified from the connection control unit, the base station information 40 notified via the external I / F 508, etc., and stores the positioning sequence control unit 505, the connection control unit 504, In response to a request from the processing unit 506, the terminal unit 30 notifies the held terminal information 30 and base station information 40.
- the external I / F unit 508 is an interface used when information is stored in the database 507 from other than the fixed network 24.
- the database 507 of the RNC 25 stores information in the format shown in Fig. 8 as terminal information, and information in the format shown in Fig. 11 as information on the base stations 22 and 23 as base station information. It is assumed that it is stored.
- FIG. 5 is a drawing illustrating the principle of specifying the position of the terminal 21 in the present embodiment. It is assumed that a connection has been established between the terminal 21 and the RNC 25 via the base station 22.
- the RNC 25 stores the terminal information 30 of the terminal 21 and the base station information 40 of the base stations 22 and 23 in the database 507. are doing.
- the terminal 21 measures the reception time of the pilot signals transmitted by the base stations 22 and 23, and is calculated from the difference between the measured reception times of the pilot signals transmitted by the base stations 22 and 23. The difference between the distances is calculated, and the differential force of the calculated distance is calculated.
- the base calculated from the hyperbolic curve 11 to be calculated and the round-trip propagation time between the base station 22 and the terminal 21 where the radio link is established between the terminal 21 A circle 12 whose radius is the distance between the station 22 and the terminal 21 is obtained. Then, two intersections of the hyperbolic line 11 and the circle 12 are set as candidate points 13 and 14, and angles 15 and 16 of angles formed by straight lines connecting each of the candidate points and the base station 22 with true north are calculated.
- the center direction of the sector 27 where the terminal is located is acquired by referring to the base station information 40.
- the center direction of the sector is compared with the calculated angles 15 and 16, and the candidate point 13 having the angle 15 having an angle close to the center direction of the sector is specified as the position of the terminal 21.
- the information indicating the direction of the sector 27 stored in the base station information 40 is the start angle of the sector 27, the angles 15, 16 and the start angle of the sector 27 are compared. A candidate point having an angle larger than the start angle of the sector 27 is specified as the position of the terminal 21.
- FIG. 14 is a diagram showing terminal information of the terminal 21 held by the RNC 25.
- FIG. 15 is a diagram showing the base station information 60 of the base stations 22 and 23 held by the RNC 25.
- FIG. 16 is a diagram showing an example of a procedure until the position of the terminal 21 is determined.
- the RNC 25 informs the terminal 21 of information necessary for the position determination. Send a message requesting measurement to collect information (step 81). Specifically, in terminal 21, the base station requests measurement of the difference between the reception times of the pilot signals transmitted to each of different sectors 27, 29, and 1002. At this time, the terminal 21 is notified of the scramble ring 'code number of the reference sector and the scramble ring' code number used by the sector to be measured other than the reference as auxiliary information.
- the sector to which the information notified as the auxiliary information is notified is selected as follows.
- the scramble ring used by the sector 27 as the code number of the reference sector and the scramble ring used by the sector to be measured other than the reference are used.
- the code number the scrambling code number used by sector 29 and the scrambling ring code used by sector 1002 are notified.
- RNC 25 transmits a message requesting measurement for collecting information necessary for position determination to base station 22 (step 82). Specifically, it requests a measurement of the round-trip propagation time between the terminal 21 and the base station 22. At this time, the base station 22 is notified of the terminal ID of the terminal 21 to be measured.
- Terminal 21 that has received the measurement request measures the reception time of the pilot signal received from each of the sectors specified by RNC 25 (sectors 27, 29, and 1002 in this embodiment). In this embodiment, it is assumed that the terminal 21 cannot receive the pilot signal from the sector 1002 for some reason. The reason that the signal from the sector 1002 cannot be received may be due to the distance between the terminal 21 and the base station 1001 or the influence of a shield such as a building.
- the calculation result is transmitted to the RNC 25 (step 85).
- the pilot signal from sector 1002 since it is assumed that the pilot signal from sector 1002 has not been received, only one difference in reception time is reported.
- the base station 22 that has received the measurement request transmits a signal from the RNC 25 to the specified terminal (terminal 21 in this embodiment), and transmits a reception time and a signal at which a response was received from the terminal. From the time difference, the round trip propagation time of the signal between the terminal 21 and the base station 22 is measured (step 84).
- the measured round-trip propagation time is transmitted to the RNC 25 (step 86).
- step 89 the RNC 25 specifies the position of the terminal 21.
- the RNC 25 specifies the position of the terminal 21.
- arithmetic processing section 506 specifies the position of terminal 21 using the measurement results.
- FIG. 17 is a diagram showing a flow of processing in the arithmetic processing unit 506 of the RNC 25.
- the arithmetic processing unit 506 checks the content of the measurement result reported by the terminal 21 (F1, F3). Specifically, the number of differences between the measured reception times is confirmed. If the number is two or more, it means that signals from three or more base stations are being received, so the OTDOA positioning arithmetic processing is performed (F2). If no difference in reception time is reported, it is recognized as positioning failure
- the sector 27 from which the difference between the reception times could be measured with reference to the base station information 30 held in the database 507. And, from the base station information 30 of the base stations 22 and 23 to which the sector 29 belongs, the latitude 62a, the longitude 63a, the latitude 62b, and the longitude 63b are acquired (F4).
- the difference between the reception times reported from the terminal 21 is corrected with the difference between the transmission times (F5).
- F5 The difference between the transmission times
- the difference between the reception times as the measurement results is calculated and the difference between the distance between the base station 22 and the terminal 21 and the distance between the base station 23 and the terminal 21 is calculated.
- the hyperbola 11 having the base stations 22 and 23 as focal points is calculated using the difference between the distances obtained (F6).
- the distance between the terminal 21 and the base station 22 is obtained from the round trip propagation time reported from the base station 22, the calculated distance is used as a radius, and the geographical position of the base station 22 obtained in F4 is calculated.
- a circle 12 centered on the indicated latitude 62a and longitude 63a is calculated (F7).
- the center direction 65b obtained as the center direction of the sector 27 where the terminal 21 is located is compared with the angles 15 and 16 to determine the position of the candidate point having an angle close to the angle indicating the center direction of the sector 27. Is the position of the terminal 21.
- the position of the terminal 21 is specified as the candidate point 13 (F11).
- FIG. 18 is a diagram illustrating a procedure until the position of the terminal 21 is determined in the second embodiment.
- RNC 25 transmits a message requesting measurement to collect information necessary for position determination to terminal 21 (step 81). At this time, information necessary for measurement is notified as auxiliary information. Note that the notified auxiliary information is the same as that in the first embodiment, and thus the description is omitted.
- the terminal 21 that has received the measurement request performs the requested measurement, and reports the measurement result to the RNC 25 (step 85). Note that the details of the measurement at the terminal 21 are the same as in the case of the present embodiment, and thus the description is omitted.
- RNC 25 receives the measurement result from terminal 21, RNC 25 confirms the reported measurement result. Specifically, the number of differences in the reception time at which the measurement was successful is confirmed. Reception time when measurement was successful If the number of differences is 2, step 89 is executed. In this case, step 89
- the calculation processing for OTDOA positioning is executed.
- step 89 is executed.
- FIG. 19 is a diagram showing a flow of processing in the arithmetic processing unit 506 of the RNC 25 in step 89 in this case.
- the description of the processing flow in the arithmetic processing unit 506 of the RNC 25 is based on the assumption that the base station information 40 stores the center direction of the sector. If the start angle is stored, the process in F11 is changed.
- F11 compares the obtained start angle with angles 15 and 16, and determines the position of the candidate point having an angle larger than the start angle in the terminal. Position 21. In this embodiment, since the angle 15 has a larger angle than the start angle of the sector 27, the position of the terminal 21 is specified as the candidate point 13.
- the input terminal 21 refers to the center direction or the start angle of the sector stored in the base station information 40.
- the angle of the terminal 21 can also be specified using the notified auxiliary information.
- the arithmetic processing unit 506 of the RNC 25 refers to the database 507, obtains the latitude and longitude of the base station 1001 for which measurement has failed, and obtains the position of the base station 22 designated as the reference base station.
- the angle formed by the straight line connecting the position of the base station 1001 having the sector for which measurement has failed and the true north is calculated, and the calculated angle is defined as the sector direction of the sector designated as the reference base station.
- the calculated center direction of the sector is compared with angles 15 and 16, and the position of a candidate point having an angle close to the angle indicating the center direction of the sector is determined as the position of terminal 21.
- the position of the terminal 21 is a candidate point.
- Embodiment 2 Embodiment 2 of the present invention will be described with reference to the drawings.
- a fifth embodiment describes an example in which the terminal 21 performs an arithmetic process for determining a position.
- FIG. 20 is a configuration diagram showing a configuration of the terminal 21 having a function of performing arithmetic processing.
- FIG. 20 is a configuration diagram showing a configuration of the terminal 21 having a function of performing arithmetic processing.
- the drawings only the components necessary for the description of the present embodiment are shown.
- Radio signal receiving section 2401 has a function of receiving a signal transmitted from the base station, and radio signal transmitting section has a function of transmitting a radio signal to the base station.
- the RRC message processing unit 2403 processes the message from the RNC received via the radio signal receiving unit 2401, and notifies the operation control unit 2405 of the reception of the message. Further, it generates a message in accordance with the instruction to the operation control unit 2405 and transmits the message to the RNC via the radio signal transmission unit 2402.
- Measuring section 2404 measures the reception time of the pilot signal from the base station according to the instruction of operation control section 2405, and notifies the control section of the measurement result.
- the operation control unit 2405 When the operation control unit 2405 notifies the reception of the RRC message processing unit message, the operation control unit 2405 stores the auxiliary information included in the message in the memory 2407 and executes the measurement unit 2404 to execute the requested measurement. Control. Further, it notifies the arithmetic processing unit 2406 of the reception time measured by the measuring unit 2404.
- the arithmetic processing unit 2406 performs an arithmetic process for specifying its own position from the measurement result notified from the operation control unit 2405 and the auxiliary information held in the memory 2407.
- FIG. 21 is a diagram showing an example of a process flow when the terminal 21 performs an arithmetic process for determining a position.
- the RNC 25 requests the base station 22 for measurements necessary for determining the position of the terminal 21 (step 91). This step is the same as step 82 in the first embodiment.
- the base station 22 Upon receiving the request from the RNC 25, the base station 22 transmits a signal to the terminal specified by the RNC 25 (the terminal 21 in this embodiment), and receives the response time from the terminal and the reception time.
- the round trip propagation time of the signal between the terminal 21 and the base station 22 is measured from the difference between the times at which the signals were transmitted (step 92), and the measured round trip propagation time is transmitted to the RNC 25 (step 93).
- Step 91 is the same as step 84 of the first embodiment
- step 92 is the same as step 86 of the first embodiment.
- RNC 25 Upon receiving the measurement result from base station 22, RNC 25 generates auxiliary information necessary for performing measurement and arithmetic processing on terminal 21 (step 94). The generated auxiliary information will be described below.
- the auxiliary information generated by the RNC 25 includes the following information-a scrambling ring used by the reference sector and a sector used by the code number terminal 21.
- the rescue ring code number is set.
- the connection established between the terminal 21 and the RNC 25 uses the radio link established with the base station 22, and the terminal 21 is located in the sector 27. Set the scrambling 'code number used by sector 27.
- a round-trip propagation delay time between the base station 22 and the terminal 21 is set.
- the latitude and longitude of the base station 23 and the latitude and longitude of the base station 1001 are set.
- the scrambling code numbers used by the sectors 29 and 1002 are set.
- the transmission timing of the sector 29 and the sector 1002 based on the transmission timing of the sector 27 is notified.
- step 95 When the generation of the auxiliary information is completed, a request for positioning is made to the terminal 21 (step 95). At this time, the auxiliary information generated in step 95 is simultaneously notified.
- the terminal 21 that has received the positioning request from the RNC 25 refers to the simultaneously transmitted auxiliary information and performs measurement (step 96).
- the difference between the reception time of the pilot signal received from the sector 27 and the reception time of the pilot signal received from the sector 29 is measured.
- the terminal 21 cannot receive the pilot signal from the sector 1002 for some reason.
- the reason that the signal from the sector 1002 cannot be received may be due to the distance between the terminal 21 and the base station 1001 or the influence of a shield such as a building.
- the notified auxiliary information is stored in the memory 2407.
- step 98 the terminal 21 performs a process for specifying its own position.
- the details of the processing will be described with reference to the drawings.
- FIG. 22 is a diagram showing a flow of processing executed by the arithmetic unit 2406 of the terminal 21.
- the arithmetic processing unit 2406 checks the contents of the measurement result (F2501, F2503). Specifically, the number of differences between the measured reception times is confirmed. If there are two, it means that signals from three base stations are being received, so the OTDOA positioning arithmetic processing is performed (F2502). When receiving If no difference of IJI is reported, it is recognized as positioning failure (F2512).
- the difference between the measured reception times is one, the difference is notified as auxiliary information and
- the latitude and longitude indicating the positions of the base stations 22 and 23 stored in the 2407 are acquired (F2504).
- information about the difference between the transmission times and information about the round-trip propagation time between the base station 22 and the terminal 21 are also acquired.
- the distance between the base station 22 and the terminal 21 and the base distance are determined from the measurement results.
- the difference between the distance between the base station 23 and the terminal 21 is determined, and the difference between the calculated distance and the base station 22 are used.
- the distance between the terminal 21 and the base station 22 is obtained from the round trip propagation time acquired in F2504, and the calculated distance is used as a radius to calculate a circle 12 centered on the base station 22 (F2507).
- the latitude-longitude of the base station 1001 for which the measurement failed is obtained by referring to the memory 2407, and the position and measurement of the base station 22 designated as the reference base station are obtained.
- the angle between the straight line connecting the position of the base station 1001 having the failed sector and the true north is calculated, and the calculated angle is set as the sector direction of the sector specified as the reference base station.
- the center direction of the sector 27 is calculated to be 300 degrees.
- the calculated center direction of the sector is compared with angles 15 and 16, and the position of a candidate point having an angle close to the angle indicating the center direction of the sector is determined as the position of terminal 21.
- the position of the terminal 21 is specified as the candidate point 13.
- the terminal 21 reports the information of the specified own location to the RNC 25 (step 99).
- FIG. 23 is a diagram showing another example of the procedure until the position of the terminal 21 is determined.
- a positioning request is made to the terminal 21 (step 95).
- the auxiliary information necessary for positioning is notified at the same time. The details of the information included in the auxiliary information are described below.
- a scrambling ring code number used by the sector in which the terminal 21 is located is set.
- the connection established between the terminal 21 and the RNC 25 uses the radio link established between the base station 22 and the terminal 21 is located in the sector 27. So, set the scramble ring 'code number used by sector 27.
- the latitude and longitude of the base station 23 and the latitude and longitude of the base station 1001 are set.
- the scrambling code numbers used by the sectors 29 and 1002 are set.
- the difference between the latitude and longitude of the base stations 23 and 1001 and the latitude and longitude of the base station 22 is set.
- the transmission timing of the sector 29 and the sector 1002 based on the transmission timing of the sector 27 is notified.
- the terminal 21 that has received the positioning request from the RNC 25 performs measurement by referring to the auxiliary information transmitted at the same time (step 96).
- the difference between the reception time of the pilot signal received from the sector 27 and the reception time of the pilot signal received from the sector 29 is measured.
- the terminal 21 cannot receive the pilot signal from the sector 1002 for some reason.
- the reason that the signal from the sector 1002 cannot be received may be due to the distance between the terminal 21 and the base station 1001 or the influence of a shield such as a building.
- the notified auxiliary information is stored in the memory 2407.
- step 910 the measurement result is confirmed (step 910). Specifically, the number of measured reception time differences is confirmed. If the number of measured differences is two, the processing of step 98 is performed without performing the processing indicated by 913 in the figure. If there is no measured difference, step 99 is executed without performing steps 911 and 98. At this time, "Positioning failure" is reported as the positioning result.
- the terminal 21 notifies the RNC 25 of auxiliary information necessary for specifying its own position (Step 911). Specifically, it requests the round-trip propagation time between the base station 22 and the terminal 21 where the radio link is established.
- RNC 25 that has received the request from terminal 21 transmits a measurement request to base station 22 (step 91).
- the base station 22 Upon receiving the request from the RNC 25, the base station 22 transmits a signal to the terminal specified by the RNC 25 (the terminal 21 in this embodiment), and receives the response time from the terminal and the reception time.
- the round trip propagation time of the signal between the terminal 21 and the base station 22 is measured from the difference between the times at which the signals were transmitted (step 92), and the measured round trip propagation time is transmitted to the RNC 25 (step 93).
- Step 91 is the same as step 84 of the first embodiment
- step 92 is the same as step 86 of the first embodiment.
- RNC 25 that has received the measurement result from base station 22 notifies terminal 21 of the round-trip propagation time reported from base station 22 as auxiliary information (step 912).
- step 98 the terminal 21 performs a process for calculating a candidate point of its own position.
- the details of the processing in this modified example will be described with reference to the drawings.
- FIG. 24 is a diagram showing a flow of processing executed by the arithmetic unit 2406 of the terminal 21.
- the description of the flow of processing in the arithmetic processing unit 2406 of the terminal 21 is based on the assumption that the position of the terminal 21 is specified by calculating the direction of each sector from the positional relationship of the three base stations notified as auxiliary information. However, there may be cases where the center direction of the sector is notified as auxiliary information.
- the auxiliary information notified in step 95 includes the following information.
- a scrambling ring code number used by the sector in which the terminal 21 is located is set.
- the connection established between the terminal 21 and the RNC 25 is the base Since the terminal 21 is located in the sector 27 using the radio link established with the station 22, the terminal sets the scrambling 'code number used by the sector 27.
- the latitude and longitude of the base station 23 and the latitude and longitude of the base station 1001 are set.
- the center direction of the sector 27 is set.
- the scrambling code numbers used by the sectors 29 and 1002 are set.
- the difference between the latitude and longitude of the base stations 23 and 1001 and the latitude and longitude of the base station 22 is set.
- the center direction of the sectors 29 and 1002 is set.
- the transmission timing of the sector 29 and the sector 1002 based on the transmission timing of the sector 27 is notified.
- the base station information stored in the memory 2407 is referred to, and the center direction 65b (in this case, "305 ") (F10).
- the acquired center direction held in the memory 2407 is compared with the angles 15 and 16 as the center direction of the sector 27 where the terminal 21 is located, and the angle close to the angle indicating the center direction of the sector 27 is determined.
- the position of the candidate point is the position of the terminal 21.
- the angle 15 is closer to the center direction of the sector 27, the position of the terminal 21 is specified as the candidate point 13.
- a case where the start angle of the sector is notified may be considered. The processing in F2511 in this case is described below.
- the start angle acquired from the memory 2407 is compared with the angles 15 and 16, and the position of the candidate point having an angle larger than the start angle is determined as the position of the terminal 21.
- the angle 15 since the angle 15 has a larger angle than the start angle of the sector 27, the position of the terminal 21 is specified as the candidate point 13.
- the positions of the base stations 23 and 1001 are notified to the terminal 21 as a difference from the base station 22. It may be notified as absolute latitude and longitude.
- Embodiment 3 Embodiment 3 of the present invention will be described with reference to the drawings.
- the RNC 25 or the terminal 21 described the method of calculating the candidate points 13 and 14 by obtaining the intersection of the hyperbola 11 and the circle 12, with the focus on the base station 22. It is also conceivable to find the two candidate points by finding the intersection of the circle (the circle 12) and the circle centered on the base station 23.
- FIG. 25 is a drawing illustrating the principle of determining the position of the terminal 21 in the present embodiment.
- the base station 22 calculated from the round trip propagation time between the terminal 21 and the base station 22 and the base station 22 calculated from the round trip propagation time between the terminal 21 and the base station 23 are calculated. Calculate the two candidate points 13 and 14 of the terminal 21 by finding the intersection with the circle 11 centered on the station 23
- FIG. 26 is a diagram illustrating an example of a procedure for determining the position of the terminal 21 according to the present embodiment.
- the RNC 25 that intends to specify the position of the terminal 21 first requests the base station 23 to establish a radio link with the terminal 21 (step 1201). At this time, the RNC 25 notifies the base station 23 of the parameters necessary for establishing a radio link, but since this has no direct relationship with the description of the present embodiment, detailed description is omitted.
- the base station 23 requested to establish a radio link secures resources and sets various parameters for a new radio link (step 1202). The details of the processing performed by the base station 23 are not directly related to the description of the present embodiment, and thus the detailed description is omitted.
- the RNC 25 requests the terminal 21 to add a sector for receiving a signal (step 1204).
- the scrambling 'code number used by the sector that receives the new signal is notified.
- the terminal 21 holds a list of sectors to be received (hereinafter, referred to as an active 'set').
- a request is made to add a scrambling 'code number designated to the active' set '.
- "143" which is the code number of the scrambling used by the sector 29 of the base station 23 is designated.
- the terminal 21 that has received the request to add the active set hesclamp ring 'code number adds the scramble ring' code number included in the request to its own active 'set', and The reception of a signal from the sector is started (step 1205). After that, the RNC 25 is notified that the addition of the active 'scramble ring to set' code number has been completed (step 1206).
- the RNC 25 notified of the completion of the addition to the active set requests the base stations 22 and 23 to measure the round-trip propagation time of the signal to and from the terminal 21 (steps 1207 and 1208). ). At this time, the terminal ID of the terminal 21 to be measured is notified.
- the base stations 22, 23 that have received the measurement request measure the round-trip propagation time with reference to the terminal ID of the terminal 21 included in the request (steps 1209, 1210).
- the measurement result is notified to the RNC 25 (steps 1211, 1212).
- step 1213 the process in step 1213 will be described with reference to the drawings.
- FIG. 27 is a diagram showing a flow of processing in the arithmetic processing unit 506 of the RNC 25.
- the arithmetic processing unit 506 of the RNC 25 acquires information on the positions of the base stations 22 and 23 stored in the database 507 (F2601).
- the distance between the terminal 21 and the base station 22 is calculated based on the round-trip propagation time reported from the base stations 22 and 23.
- the distance between the terminal 21 and the base station 23 is calculated, and the circle 12 having the base station 22 as the center and the radius between the terminal 21 and the base station 22 as the radius and the base 21 as the center and the terminal 21 and the base station 23 are calculated.
- the circle 1101 having the radius as the distance is calculated (F2602).
- angles 15 and 16 are calculated using the information on the positions of base stations 22 and 23 acquired in F2601 (F9). Thereafter, the position of the terminal 21 is specified for one of the two candidate points with reference to the base station information 40 held in the database 507 (F11). Note that F9-11 is the same as the processing in the above-described embodiment, and a description thereof will be omitted.
- the RNC 25 specifying the position of the terminal 21 requests the terminal 21 to delete an unnecessary scrambling code from the active set in order to delete a radio link unnecessary for communication ( Step 1214).
- the specified scrambling code number is deleted from the active set (step 1215).
- the RNC 25 is notified that the deletion is completed (step 1216).
- the RNC 25 notified of the completion of the deletion from the active set requests the base station 23 to disconnect the radio link (step 1218).
- the base station 23 requested to disconnect the radio link releases the secured resources and resets various parameters (step 1218), and when the processing is completed, notifies the RNC 25 of the completion of the processing. Notify (step 1219).
- FIG. 28 is a diagram showing an example of a procedure for specifying a position when the terminal 21 performs an arithmetic process for specifying a position.
- Steps 1201 to 1212 are the same as those described as the third embodiment. Detailed description is omitted in the description.
- the RNC 25 that has confirmed that the specified scramble ring 'code number has been added to the active set of the terminal 21 requests the terminal 21 to perform positioning (step 1301). At this time, the auxiliary information necessary for the arithmetic processing is simultaneously notified. The details of the notified information are described below.
- a scrambling ring code number used by the sector in which the terminal 21 is located is set.
- a scrambling code number used by the sector 27 is set.
- a round-trip propagation delay time between the base station 22 and the terminal 21 is set.
- the latitude and longitude of the base station 22 are set.
- the scrambling 'code number used by the sector 29 of the base station 23 is set.
- the difference between the latitude and longitude of the base station 23 and the latitude and longitude of the base station 22 is specified.
- a round-trip propagation delay time between the base station 23 and the terminal 21 is set.
- the center direction of the sector 27 where the terminal 21 is located is set.
- step 1302 the process in step 1302 will be described with reference to the drawings.
- FIG. 29 is a diagram showing a flow of processing in the arithmetic processing unit 2406 of the terminal 21 in step 1302.
- the arithmetic processing unit 2406 of the terminal 21 refers to the memory 2407 and acquires the positions of the base stations 22, 23 and the round-trip propagation time with the terminal 21 (F3601).
- the arithmetic processing unit 2406 of the terminal 21 calculates the distance between the terminal 21 and the base station 22 and the distance between the terminal 21 and the base station 23 from the round-trip propagation time with the terminal 21 acquired in F3601, The circles 12 and 1101 centered on the positions of the base stations 22 and 23 acquired in F3601 are obtained (F3602).
- the arithmetic processing unit 2406 of the terminal 21 calculates the intersection of the two circles calculated in F3602, and obtains candidate points 13 and 14 (F3603).
- Embodiment 4 Embodiment 4 of the present invention will be described with reference to the drawings.
- FIG. 30 is a drawing showing the principle of specifying the position of the terminal 21 in the present embodiment.
- the terminal 21 is equipped with a GPS receiver that receives a signal from the GPS satellite 1401, and the terminal 21 can specify the time at which the signal from the GPS satellite is received.
- the distance between the GPS satellite 1401 and the terminal 21 can be calculated from the difference between the transmission time at which the terminal 21 transmitted the signal and the reception time at which the terminal 21 received the signal.
- the circle 1402 can be obtained.
- the distance between the base station 22 and the terminal 21 can be calculated from the round-trip propagation time of a signal exchanged between the base station 22 and the terminal 21, and the base distance can be calculated from the calculated distance.
- a circle 1403 with station 22 as the center can be obtained.
- candidate point 1404 can be identified as being the position of terminal 21.
- FIG. 31 is a drawing showing a configuration of the terminal 21 in the present embodiment. Note that only parts relevant to the description of the present embodiment are shown.
- Wireless signal receiving unit 2401 wireless signal transmitting unit 2402, RRC message processing unit 2403, memory
- the GPS signal receiving unit 2701 has a function of receiving a signal from a GPS satellite, receives a signal from the GPS satellite specified by the measuring unit 2702, and notifies the measuring unit 2702 of the received signal. .
- the measurement unit 2702 measures the reception time and transmission time of the signal received by the GPS signal reception unit 2701 or calculates the difference between the reception time of the signal received by the wireless signal reception unit 2401 according to the request from the operation control unit 2703. The measurement is performed, and the measurement result reported to the GPS signal receiving unit is notified to the operation control unit 2703.
- the operation control unit 2703 sends a signal from the GPS satellite to the measurement unit 2702. It requests the measurement of the reception time and transmission time of the UE or the measurement of the reception time of the signal from the base station, and notifies the measurement result notified from the measurement unit 2702 to the RRC message processing unit 2403.
- terminal 21 has established a connection with RNC 25 using a radio link established with base station 22. Also, it is assumed that the RNC 25 holds terminal information and base station information, and the format of the base station information is the format shown in FIG. In addition, it has orbit information of multiple GPS satellites.
- the RNC 25 requests the terminal 21 for measurement (step 81). However, unlike the first embodiment, a request is made to measure signals from GPS satellites 1401, 1408, and 1409. Also this time, the information notified as auxiliary information is the orbit information of the GPS satellite to be measured.
- the RNC 25 requests the base station 22 to measure the round-trip propagation time with the terminal 21 (step 82). Since the processing in this step is the same as that in the first embodiment, the description is omitted.
- the terminal 21 that has received the measurement request performs the requested measurement (step 83).
- the terminal 21 uses the orbital information of the GPS satellites 1401, 1408, and 1409 notified as auxiliary information to determine the transmission time included in the signals from the GPS satellites 1401, 1408, and 1409, and Measure the reception time.
- the terminal 21 can receive only the signal from the GPS satellite 1401 and cannot receive the signal from the GPS satellites 1408 and 1409 for some reason.
- the reason why signals from the GPS satellites 1408 and 1409 cannot be received may be due to the effects of shields such as buildings.
- the measurement result is reported to RNC 25 (step 85).
- what is reported as the measurement result is the transmission time included in the signal from the GPS satellite 1401 and the reception time at the terminal 21. Measurement failure is reported for GPS satellites 1408 and 1409.
- Base station 22 that has received the measurement request measures the round-trip propagation time with terminal 21 (step 84), and reports the measurement result to RNC 25 (step 86).
- the processing in each step is the same as the processing described in the above-described embodiment, and a description thereof will be omitted.
- the RNC 25 receiving the report of the measurement result from the terminal 21 and the base station 22 specifies the position of the terminal 21 (step 83). The details of the processing in this step will be described below with reference to the drawings.
- FIG. 32 is a diagram showing a flow of processing in the arithmetic processing unit 506 of the RNC 25 in the present embodiment.
- the arithmetic processing unit 506 of the RNC 25 confirms the measurement result of the signal from the GPS satellite reported from the terminal 21 (F2801, 2803, 2805).
- arithmetic processing for GPS positioning is performed (F2802). If the number of GPS satellites is 3 ⁇ 4, the arithmetic processing for positioning using two GPS satellites is performed (F2805). If the number of GPS satellites is only a few, the processing after F2806 is performed. If the number of GPS satellites is 0, Recognize the failure and end the process (F12).
- the number of GPS satellites that can be measured by the terminal 21 is one, and the processing after F2806 will be described. Note that the calculation processing for positioning using two GPS satellites (F2805) will be described in an embodiment to be described later, and a description thereof will be omitted in this embodiment.
- the arithmetic processing unit 506 of the RNC 25 refers to the database 507 to obtain the latitude and longitude indicating the position of the base station 22 and the orbit information of the GPS satellite 1401.
- a circle 1402 is obtained from the orbit information of the GPS satellite obtained in F2806 and the measurement result reported from the terminal 21 (F2807), and the position of the base station 22 obtained in F2806 and the Circle 12 is calculated using the reported round-trip propagation time (F7).
- the processing in F7 is the same as the processing described in the first embodiment.
- the center direction 65b acquired last as the center direction of the sector 27 in which the terminal 21 is located is compared with the angles 1406 and 1407, and the angle is close to the angle indicating the center direction of the sector 27.
- the position of the candidate point is the position of the terminal 21.
- the position of the terminal 21 is specified as the candidate point 1404.
- the RNC 25 When determining the position of the terminal 21, the RNC 25 requests the terminal 21 for measurement for collecting information necessary for the position determination (step 81). However, in the present modification, it is required to measure signals from the GPS satellites 1401, 1408, and 1409. In this case, Orbit information of the GPS satellite to be measured.
- the terminal 21 that has received the measurement request performs the requested measurement, and reports the measurement result to the RNC 25 (step 85). Note that the processing in this step is the same as the processing described in the present embodiment, and a description thereof will be omitted.
- RNC 25 checks the reported measurement result (step
- step 810) confirm the number of GPS satellites that have been successfully measured. If the number of reception time differences for which measurement was successful is 3, execute step 89. In this case, step
- step 89 is performed.
- FIG. 33 is a drawing showing the flow of processing in the arithmetic processing unit 506 of the RNC 25 in step 89 in this case.
- Arithmetic processing section 506 of RNC 25 having received the report of the measurement result from base station 22 confirms again the measurement result received from terminal 21 in step 810 (F2901). If the number of GPS satellites measured by the terminal 21 is 3 ⁇ 4, the processing after F2804 is performed. If there was one,
- the obtained start angle is compared with the angles 1406 and 1407, and the position of the candidate point having an angle larger than the start angle is determined by the terminal 21. Position. In this embodiment, angle 15 is greater than the start angle of sector 27. Therefore, the position of the terminal 21 is specified as the candidate point 1404.
- the RNC 25 performs arithmetic processing for specifying the position of the terminal 21.
- RNC 25 makes a measurement request to base station 22 (step 91), and base station 22 that received the measurement request measures round trip propagation time with terminal 21 (step 92), and transmits the measurement result to RNC 25. (Step 93).
- the processing in each step is the same as in the second embodiment, and a description thereof will not be repeated.
- RNC 25 receives the report of the measurement result from base station 22, RNC 25 generates auxiliary information to be notified to terminal 21 (step 94). However, unlike the second embodiment, the following information is included in the auxiliary information.
- the orbit information of the GPS satellites 1401, 1408, and 1409 is set.
- the RNC 25 transmits a positioning request to the terminal 21 (Step 95). At this time, auxiliary information including the above-mentioned information is simultaneously notified.
- the terminal 21 that has received the positioning request transmits the GPS satellites 1401, 1408,
- the signal is measured from the GPS satellite with reference to the orbit information of 1409 (step 96). This step is the same as step 83 of the fourth embodiment, and a description thereof will not be repeated.
- FIG. 34 is a diagram showing a flow of processing in the arithmetic processing unit 2407 of the terminal 21 in the present embodiment.
- the arithmetic processing unit 2406 of the terminal 21 checks the measurement result of the signal from the GPS satellite (F3001, 3003, 3004). If the number of GPS satellites measured by the terminal 21 is 3 ⁇ 4 or more, arithmetic processing for GPS positioning is performed (F3002). If the number of GPS satellites is less than one, a positioning calculation process using two GPS satellites is performed (F3011). If there are only a few GPS satellites, perform the processing after F3004. If the number of GPS satellites is 0, it recognizes that positioning has failed and ends the process (F2512).
- the number of GPS satellites that can be measured by the terminal 21 is one, and the processing after F3004 will be described.
- the calculation processing for positioning using two GPS satellites (F3011) will be described as another mode of the fifth embodiment, and therefore, the description thereof will be omitted in this embodiment.
- a circle 1402 is obtained from the orbital information of the GPS satellites acquired in F3005 and the measurement result reported from the terminal 21 (F3006), and the position of the base station 22 acquired in F3005 and the Circle 12 is calculated using the reported round-trip propagation time (F2507).
- the processing in F2507 is the same as the processing described in the second embodiment.
- the center direction of the sector 27 in which the terminal 21 is located is acquired by referring to the base station information notified as auxiliary information and held in the memory 2407.
- the center direction obtained as the center direction of the sector 27 where the terminal 21 is located is compared with the angles 1406 and 1407, and the candidate having an angle close to the angle indicating the center direction of the sector 27 is compared.
- the position of the point is the position of the terminal 21.
- the angle 1406 is closer to the center direction of the sector 27, the position of the terminal 21 is specified as the candidate point 1404.
- the RNC 25 transmits a positioning request to the terminal 21 (step 95). At this time, the following information is simultaneously notified as auxiliary information.
- the orbit information of the GPS satellites 1401, 1408, and 1409 is set.
- the terminal 21 that has received the positioning request uses the GPS satellites 1401, 1408,
- the signal is measured from the GPS satellite with reference to the orbit information of 1409 (step 96). This step is the same as step 83 of the fourth embodiment, and a description thereof will not be repeated.
- the terminal 21 checks the measurement result. If the number of GPS satellites for which measurement was successful is three, the processing of steps 98 and 99 is executed without executing the processing indicated by 913 in the figure. However, in step 98, arithmetic processing for GPS positioning is performed. If the number of GPS satellites for which the measurement was successful is 0, the processing of step 99 is executed. However, "Positioning failure" is reported as the positioning result.
- the terminal 21 requests the RNC 25 to notify it of auxiliary information necessary for specifying its own position (step 911). Specifically, it requests a round-trip propagation delay time between the position of the base station 22 and the base station 22-terminal 21.
- RNC 25 Upon receiving the request from terminal 21, RNC 25 requests measurement for generating auxiliary information from base station 22 (step 91), and base station 22 that received the measurement request makes a round trip to terminal 21. Measure the propagation time (step 92) and report the measurement result to RNC25 (step 93). The processing in each step is the same as in the second embodiment, and a description thereof will not be repeated.
- the RNC 25 When the generation of the auxiliary information is completed, the RNC 25 notifies the terminal 21 of the auxiliary information including the following information.
- the terminal 21 Having received the auxiliary information, the terminal 21 performs a process for calculating a candidate point (step 98).
- a process for calculating a candidate point step 98.
- Fig. 35 is a diagram showing a flow of processing in the arithmetic processing unit 2407 of the terminal 21 in the present embodiment.
- the information on the direction of the sector reported from RNC 25 as the auxiliary information is the center direction of the sector, but the information on the direction of the sector is reported as the start angle of the sector. May be.
- F2511 compares the obtained start angle with angles 1406 and 1407, and determines the position of the candidate point having an angle larger than the start angle in terminal 21. Position. In the present embodiment, since the angle 15 has an angle larger than the start angle of the sector 27, the position of the terminal 21 is specified as the candidate point 1404.
- FIG. 36 is a drawing illustrating the principle of specifying the position of the terminal 21 in the present embodiment.
- the terminal 21 is equipped with a GPS receiver that receives a signal from the GPS satellite 1401, and the terminal 21 can specify the time at which the signal from the GPS satellite is received.
- the distance between the GPS satellite 1401 and the terminal 21 can be calculated from the difference between the transmission time when the signal was transmitted by the 1401 and 1408 and the reception time when the terminal 21 received the signal. Circles 1402 and 3201 centered on satellite 1401 can be obtained.
- candidate point 3202 is specified as being the position of terminal 21.
- terminal 21 has established a connection with RNC 25 using a radio link established with base station 22. Also, it is assumed that the RNC 25 holds terminal information and base station information, and the format of the base station information is as shown in FIG. In addition, it has orbit information of multiple GPS satellites.
- the RNC 25 requests the terminal 21 for measurement (step 81). However, unlike the first embodiment, it is required to measure signals from GPS satellites 1401, 1408, and 1409. At this time, what is notified as auxiliary information is the orbit information of the GPS satellite to be measured.
- the terminal 21 that has received the measurement request performs the requested measurement (step 83).
- the terminal 21 uses the orbital information of the GPS satellites 1401, 1408, and 1409 notified as auxiliary information to determine the transmission time included in the signals from the GPS satellites 1401, 1408, and 1409, and Measure the reception time.
- the terminal 21 can receive only signals from the GPS satellites 1401 and 1408, and cannot receive a signal from the GPS satellite 1409 for some reason.
- the reason why signals from GPS satellite 1409 cannot be received may be due to the effects of shielding such as buildings.
- the measurement result is reported to RNC 25 (step 85).
- what is reported as the measurement result is the transmission time included in the signals from the GPS satellites 1401 and 1408 and the reception time at the terminal 21. Measurement failure is reported for GPS satellite 1409.
- RNC 25 Upon receiving the report of the measurement result from terminal 21, RNC 25 specifies the position of terminal 21 (step 89). Hereinafter, details of the processing in this step will be described with reference to the drawings.
- Fig. 32 is a diagram showing a flow of processing in the arithmetic processing unit 506 of the RNC 25 in the present embodiment.
- the arithmetic processing unit 506 of the RNC 25 confirms the measurement result of the signal from the GPS satellite reported from the terminal 21 (F2801, 2803, 2805).
- arithmetic processing for GPS positioning is performed (F2802). If the number of GPS satellites is 3 ⁇ 4, the arithmetic processing for positioning using two GPS satellites is performed (F2805). If the number of GPS satellites is only a few, the processing after F2806 is performed. If the number of GPS satellites is 0, it recognizes that positioning has failed and ends the processing (F12).
- the number of GPS satellites that can be measured by the terminal 21 is two, and the processing of F2805 will be described. Note that the calculation processing for positioning using one GPS satellite (F2806 and thereafter) has been described as the fourth embodiment, and a description thereof will be omitted in this embodiment.
- FIG. 38 is a drawing showing details of the flow of processing in F2805.
- the arithmetic processing unit 506 of the RNC 25 acquires the orbit information of the GPS satellites 1401 and 1408 with reference to the database 507 (F3701).
- a circle 1402 was obtained from the orbit information of the GPS satellite 1401 obtained by F3701 and the measurement result reported by the terminal 21 (F3702), and the orbit information of the GPS satellite 1408 obtained by F3701 and the terminal 21 From the measurement results reported from, a circle 3201 is obtained.
- the position of a candidate point having an angle close to the angle indicating the center direction of the sector 27 is determined as the position of the terminal 21.
- the position of the terminal 21 is specified as the candidate point 3202.
- the obtained start angle is compared with the angles 3204 and 3205, and the position of the candidate point having an angle larger than the start angle is determined by the terminal 21. Position.
- the position of the terminal 21 is specified as the candidate point 3202.
- the RNC 25 performs the arithmetic processing for specifying the position of the terminal 21, but a method in which the terminal 21 performs the arithmetic processing is also conceivable.
- the RNC 25 transmits a positioning request to the terminal 21 (step 95).
- auxiliary information including the following information is notified at the same time.
- the orbit information of the GPS satellites 1401, 1408, and 1409 is set.
- the terminal 21 that has received the positioning request transmits the GPS satellites 1401, 1408,
- the signal is measured from the GPS satellite with reference to the orbit information of 1409 (step 96). This step is the same as step 83 of the fifth embodiment, and a description thereof will not be repeated.
- terminal 21 When the measurement is completed, terminal 21 performs a process for specifying its own position (step 98).
- FIG. 34 is a diagram showing a flow of processing in the arithmetic processing unit 2407 of the terminal 21 according to another embodiment. It is.
- the arithmetic processing unit 2406 of the terminal 21 checks the measurement result of the signal from the GPS satellite (F3001, 3003, 3004). If the number of GPS satellites measured by the terminal 21 is S3 or more, arithmetic processing for GPS positioning is performed (F3002). If the number of GPS satellites is less than one, a positioning calculation process using two GPS satellites is performed (F3011). If there are only a few GPS satellites, perform the processing after F3004. If the number of GPS satellites is 0, it recognizes that positioning has failed and ends the process (F2512).
- the number of GPS satellites that can be measured by the terminal 21 is two, and the processing of F3011 will be described. Note that the calculation processing for positioning using one GPS satellite (F3005 and later) is the same as the other aspects of the fourth embodiment, and therefore, description thereof will be omitted in this embodiment.
- FIG. 40 is a drawing showing details of the flow of processing in F3011.
- the arithmetic processing unit 2406 of the terminal 21 refers to the memory 2407 and acquires the orbit information of the GPS satellites 1401 and 1408 (F3801).
- a circle 1402 is obtained from the orbit information and measurement result of the GPS satellite 1401 obtained by F3801 (F3802), and a circle 3201 is obtained from the orbit information and measurement result of the GPS satellite 1408 obtained by F3801.
- the center direction of the sector 27 in which the terminal 21 is located is acquired by referring to the information of the center direction of the sector, which is notified as auxiliary information and is held in the memory 2407.
- the center direction obtained as the center direction of the sector 27 in which the terminal 21 is located is compared with the angles 3204 and 3205, and the candidate having an angle close to the angle indicating the center direction of the sector 27 is compared.
- the position of the point is the position of the terminal 21.
- the position of the terminal 21 is specified as the candidate point 3202.
- the information of the direction of the sector to be reported by the RNC 25 is The force described as being the center direction
- the information on the direction of the sector may be reported as the start angle of the sector.
- the F3808 compares the obtained start angle with the angles 3204 and 3205, and determines the position of the candidate point having an angle larger than the start angle in the terminal. Position 21. In the present embodiment, since the angle 3204 is larger than the start angle of the sector 27, the position of the terminal 21 is specified as the candidate point 3202.
- one of the candidate points is determined as the position of the terminal 21 from the calculated two candidate points of the terminal 21 using the information of the sector in which the terminal is located.
- a method of specifying the position of terminal 21 using the distance between base station 22 and terminal 21 is also conceivable.
- the RNC 25 requests the terminal 21 for measurement (step 81).
- the terminal 21 having received the measurement request performs the requested measurement (step 83).
- the RNC 25 to which the measurement result has been reported from the terminal 21 confirms the measurement result (step 5401). Specifically, the terminal 21 checks the number of GPS satellites successfully measured. If the number of GPS satellites measured by the terminal 21 is 3 ⁇ 4 or more, the calculation processing for GPS positioning is performed and the processing is completed. Since the processing when the number of GPS satellites measured by the terminal 21 is several has been described as the fourth embodiment, the description is omitted in the present embodiment. If it is the power of the GPS satellite measured by the terminal 21, it recognizes that the positioning has failed and terminates the processing. If the number of GPS satellites measured by terminal 21 is 3 ⁇ 4, the step indicated by 5406 in FIG. Execute.
- RNC 25 requests base station 22 to measure the round trip propagation time with terminal 21 (step 5402). . Specifically, it requires a measurement of the round-trip propagation time between the terminal 21 and the base station 22. At this time, the terminal ID of the terminal 21 to be measured is notified to the base station 22.
- the base station 22 Upon receiving the measurement request, the base station 22 transmits a signal from the RNC 25 to the specified terminal (terminal 21 in this embodiment), and transmits a reception time and a signal at which a response from the terminal was received.
- the round trip propagation time of the signal between the terminal 21 and the base station 22 is measured from the difference of the obtained times (step 5403), and the measured round trip propagation time is transmitted to the RNC 25 (step 5404).
- the RNC 25 to which the measurement result has been reported from the base station 22 performs an arithmetic process (Step 5405) for specifying the position of the terminal 21 using the arithmetic processing unit 506, and ends the process.
- FIG. 55 is a drawing showing details of the flow of processing executed in arithmetic processing section 506 of RNC 25 in step 5405.
- the arithmetic processing unit 506 of the RNC 25 calculates circles 1402 and 3201 using the measurement results of the signals from the GPS satellites 1401 and 1408 reported from the terminal 21 (F5501, 5502).
- the distance between the two candidate points 3202, 3203 and the base station 22 is calculated from the two candidate points 3202 and 3203 calculated in F5503 and the information on the position of the base station 22 obtained in F5504. (F5505).
- the distance between terminal 21 and base station 22 is calculated using the round-trip propagation time between terminal 21 and base station 22 measured at base station 22 (F5506).
- a candidate point having a value close to the distance between the terminal 21 and the base station 22 is determined as the position of the terminal.
- terminal 21 is identified as candidate point 3202 because candidate point 3202 has a value closer to the distance calculated by F5506.
- the RNC 25 executes the calculation processing for calculating the position of the terminal 21, but a method in which the terminal 21 executes the calculation processing may be considered.
- the RNC 25 requests the terminal 21 for positioning (step 95).
- the terminal 21 receiving the positioning request performs the requested measurement (step 96).
- Steps 95 and 96 are the same as those of the other embodiment 2 of the present embodiment, and a description thereof will not be repeated.
- the terminal 21 checks the measurement result (step 5601). Specifically, terminal 21 checks the number of GPS satellites successfully measured. If the number of GPS satellites measured by the terminal 21 is three or more, the processing is completed by performing the arithmetic processing for GPS positioning. The processing when the number of GPS satellites measured at the terminal 21 is one has been described as the fourth embodiment, and thus the description thereof is omitted in this embodiment. If the power of the GPS satellites measured by the terminal 21 is SO, it recognizes that positioning has failed and ends the processing. If the number of GPS satellites measured by the terminal 21 is two, the step indicated by 5605 in FIG. 43 is executed.
- the terminal 21 requests the RNC 25 for auxiliary information necessary for calculation (step 5602). Specifically, it requests information on the round trip propagation time between the terminal 21 and the base station 22.
- the RNC 25 that has received the request from the terminal 21 transmits a measurement request to the base station 22 (Step 5402), and the base station 22 that has received the measurement request from the RNC 25 performs the requested measurement.
- the measurement result is reported to the RNC 25 (step 5404) (step 5404). Note that details of step 5402 force and others 5404 are the same as those of the other aspect 4 of the present embodiment, and therefore description thereof is omitted.
- RNC 25 receives the measurement result from base station 22, RNC 25 notifies terminal 21 of the measurement result as auxiliary information (step 5603). Specifically, the round-trip propagation time between the terminal 21 and the base station 22 Is notified as auxiliary information.
- the terminal 21 that has received the auxiliary information from the RNC 25 stores the auxiliary information in the memory 2407, and calculates its own position by combining the measurement result in step 96 and the auxiliary information (step 5604).
- step 99 When the calculation process for calculating the position is completed, the positioning result is reported and the process ends (step 99).
- FIG. 57 is a diagram showing the flow of processing in the arithmetic processing unit 2406 of the terminal 21 in step 5604.
- the arithmetic processing unit 2406 of the terminal 21 obtains the orbit information of the GPS satellites 1401 and 1408 by referring to the memory 2407 (F5701), and calculates the circle 1402 and the circle 3201 together with the measurement result in step 96. Yes (F5702, F5703).
- the distance between the two candidate points calculated in F5706 and the base station 22 is compared with the distance between the terminal 21 and the base station 22 calculated in F5708.
- the candidate point having a value close to the distance between is defined as the terminal position.
- the position of the terminal 21 is specified as the candidate point 3202.
- Embodiment 6 of the present invention will be described with reference to the drawings.
- the information of the sector where the terminal 21 is located is used when specifying the position of the terminal 21, but the base station 22 receives the signal from the terminal 21
- a method of determining the position of the terminal 21 by measuring the direction is also conceivable.
- Fig. 45 is a drawing illustrating the principle of specifying the position of the terminal 21 in the present embodiment.
- the end A radio link is measured between terminal 21 and base station 22.
- the candidate points 13 and 14 are calculated by finding the intersection of the hyperbola 11 and the circle 12.
- the candidate point may be calculated by finding the intersection between the circle 12 and the circle 1101 as in the third embodiment, or by finding the intersection between the circle 1402 and the circle 1403 as in the fourth embodiment.
- a candidate point may be calculated.
- the base station information is stored in the format shown in FIG.
- the information indicating the direction of the sector may be represented by the start angle of the sector.
- the present embodiment uses the angle from the true north of the direction in which the signal from the terminal 21 arrives (hereinafter, referred to as the angle of arrival).
- the angle of arrival a method using an antenna array when receiving a signal from terminal 21 using an adaptive array antenna as a receiving antenna of base station 22 is considered.
- angles 15 and 16 are compared with the measured angle of arrival, and candidate point 13 having an angle coinciding with the angle of arrival is identified as terminal 21.
- the RNC 25 sends a measurement request to the terminal 21 (step 81), and the terminal that has received the measurement request
- step 83 performs the requested measurement (step 83) and reports the measurement result to RNC 25 (step 85). Since the processing in each step is the same as the processing in the first embodiment, the description is omitted.
- the RNC 25 also requests the base station 22 for measurement (step 82).
- the required measurements are the measurement of the round-trip propagation time between the terminal 21 and the base station 22, and the measurement of the angle of arrival of the signal of the terminal 21.
- the device ID is the measurement of the round-trip propagation time between the terminal 21 and the base station 22, and the measurement of the angle of arrival of the signal of the terminal 21.
- the base station 22 that has received the measurement request performs the requested measurement (step 84).
- the arrival angle from the terminal 21 is measured in addition to the measurement of the round-trip propagation time with the terminal 21.
- the base station 22 reports the measurement result to the RNC 25 (Step 86).
- the measurement result of the measurement of the angle of arrival of the terminal 21 force is reported.
- the RNC 25 that has received the measurement results from the terminal 21 and the base station 22 performs a process for specifying the position of the terminal (step 89).
- step 89 the process of step 89 in the present embodiment will be described with reference to the drawings.
- Fig. 46 shows the flow of processing in the arithmetic processing unit 506 of the RNC 25 in the present embodiment.
- the angles 15, 16 calculated in F9 are compared with the measured arrival angles of the terminal 21, and the position of the candidate point having an angle close to the angle indicating the center direction of the sector 27 is determined as the position of the terminal 21. Do In the present embodiment, since the angle 15 is closer to 305 degrees in the center direction of the sector 27, the position of the terminal 21 is specified as the candidate point 13.
- the position described in Fig. 17 can be specified by using the procedure in Fig. 17 in the same manner as in the first embodiment.
- the measurement request 91 transmitted by the RNC 25 to the base station 22 includes a request for measurement of the angle of arrival of a signal from the terminal 21 in addition to the round-trip propagation time between the terminal 21 and the base station 22.
- the angle of arrival of the signal from the terminal 21 is measured, and the measurement result report 93 shows the measured angle of arrival in addition to the measured round-trip propagation time. included.
- the auxiliary information notified at the same time as the positioning request 94 includes the "terminal" measured by the base station 22.
- Fig. 39 is a diagram showing a flow of processing in the arithmetic processing unit 2406 of the terminal 21 in this modification.
- the angles 15 and 16 calculated in F2509 are compared with the arrival angle of the terminal 21 notified as the auxiliary information, and the candidate point having an angle close to the angle indicating the center direction of the sector 27 is determined. Let the position be the position of terminal 21. In this embodiment, since the angle 15 is closer to 305 degrees in the center direction of the sector 27, the position of the terminal 21 is specified as the candidate point 13.
- Embodiment 7 of the present invention will be described with reference to the drawings.
- one of the calculated candidate points of the two terminals 21 is specified as the position of the terminal 21 using the arrival angle of the signal from the terminal 21 measured by the base station 22.
- a method is conceivable in which one of the candidate points calculated by the terminal 21 measuring the arrival angles of the signals from the base stations 22 and 23 is determined as the position of the terminal 21.
- FIG. 48 is a drawing showing the principle of the method for specifying the position of the terminal 21 in the present embodiment. The radio link between the terminal 21 and the base station 22 is measured.
- the candidate points 13 and 14 are calculated by finding the intersection of the hyperbola 11 and the circle 12. Note that the candidate point may be calculated by obtaining the intersection between the circle 12 and the circle 1101 as in the third embodiment.
- the present embodiment uses the difference between the angles of arrival of signals from the base station 22 and the base station 23.
- a specific method of measuring the angle of arrival a method of using the antenna array direction when a signal from terminal 21 is received using an adaptive array 'antenna as the reception antenna of terminal 21 can be considered.
- the straight line connecting the base stations 22, 23 and the candidate point which are calculated from the positions of the base stations 22 and 23 and the positions of the candidate points 13 and 14, and the true north, form an angle.
- the angle that is the difference Each of 1901 and 1902 is compared with the difference of the arrival angles measured by terminal 21, and candidate point 13 having angle 1901 that matches the difference of the arrival angles is identified as terminal 21.
- the RNC 25 When determining the position of the terminal 21, the RNC 25 requests the terminal 21 for measurement for collecting information necessary for the position determination (step 81).
- the pilot transmitted and transmitted by each of the base stations 22 and 23 is determined. Requires measurement of the angle of arrival of the signal.
- the base station 22 is also requested to perform measurement for collecting information necessary for position determination (step 82). Note that the processing in this step is the same as the processing described in the first embodiment, and a description thereof will be omitted.
- the terminal 21 that has received the measurement request measures the reception time of the pilot signal received from each of the base stations (the base stations 22, 23 in this embodiment) specified by the RNC 25, and Calculate the time difference. Then, the angle of arrival of the pilot signal transmitted by each of the base stations 22 and 23 is measured (step 83). When the measurement is completed, the calculation result is sent to RNC 25 (step 85). Further, the base station 22 that has received the measurement request transmits a signal from the RNC 25 to the specified terminal (terminal 21 in this embodiment), and receives the response time from the terminal and the time at which the signal was transmitted. The round trip propagation time of the signal between the terminal 21 and the base station 22 is measured from the difference (step 84), and the measured round trip propagation time is transmitted to the RNC 25 (step 86).
- step 89 the RNC 25 calculates a candidate point for the position of the terminal 21.
- a method for specifying the position of the terminal will be described with reference to the drawings.
- Fig. 49 is a drawing showing the flow of processing in the arithmetic processing unit 506 of the RNC25.
- the candidate point 13 and the base station 23 are connected with a straight line connecting the candidate point 13 and the base station 22. Calculate the angle 1901 between the connecting straight lines. The same process is performed for the candidate point 14 to calculate the angle 1902.
- the difference between the angle of arrival reported from the terminal 21 and the angle of arrival of the base station 23 with reference to the angle of arrival from the base station 22 is calculated and compared with the angles 1901, 1902,
- the candidate point 13 having the angle 1901 whose magnitude matches the arrival angle difference is specified as the position of the terminal 21.
- the RNC 25 performs arithmetic processing for specifying the position of the terminal 21.
- the terminal 21 may perform the arithmetic processing.
- the positioning request 95 transmitted by the RNC 25 to the terminal 21 includes the measurement of the difference between the reception times of the pilot signals transmitted by the base stations 22 and 23 at the terminal 21, Each of the base stations 22 and 23 requests measurement of the angle of arrival of the pilot signal being transmitted.
- the information of "the center direction of the sector where the terminal 21 is located" is deleted from the auxiliary information notified at the same time as the positioning request 95.
- FIG. 50 is a diagram showing a flow of processing in the arithmetic processing unit 2406 of the terminal 21.
- the difference between the angle of arrival of the signal from the base station 23 when the measured angle of arrival is referenced to the angle of arrival of the signal from the base station 22 is calculated and compared with the angles 1901, 1902. ,
- the candidate point 13 having the angle 1901 having the same size as the difference in the arrival angle is identified as the position of the terminal 21 [0471]
- the position described in FIG. 23 can be specified even by using the procedure in FIG. 23 in the same manner as in the first embodiment.
- Embodiment 8 of the present invention will be described with reference to the drawings.
- two candidate points of the terminal 21 calculated using the information of the sector 27 in which the terminal 21 is located and the arrival angles of the signals received by the base station and the terminal.
- One of them is specified as the position of the terminal 21, but a method using the electric field strength of a signal received by the terminal is conceivable.
- the candidate points 13 and 14 may be calculated by finding the intersection of the hyperbola 11 and the circle 12, as in the first and second embodiments.
- the candidate point may be calculated by finding the intersection of the circle 1101 with the circle 1101, or the intersection of the circle 1402 and the circle 1403 may be found by calculating the intersection of the circle 1402 and the circle 1403 as in the fourth embodiment.
- the candidate point may be calculated by finding the intersection of the circle 1402 and the circle 3201 as in the fifth embodiment, but in the description of this embodiment, the intersection of the hyperbola 11 and the circle 12 is calculated. The case where the candidate points 13 and 14 are obtained will be described.
- the arithmetic processing for specifying the position of the terminal 21 may be performed by the RNC 25 or may be performed by the terminal 21, but in the description of the present embodiment, the RNC 25 specifies the position of the terminal 21. The processing in the case of performing is described.
- the RNC 25 transmits a measurement request to the terminal 21 (step 81). Specifically, the terminal 21 is requested to measure the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001, and to measure the received electric field strength. At this time, the auxiliary information necessary for measurement is notified, and the auxiliary information in this embodiment and the auxiliary information in Embodiment 1 are notified. Is the same as the above, and the description is omitted.
- the RNC 25 transmits a measurement request to the base station 22 (step 82), and the requested base station 22 performs measurement (step 84), and reports the measurement result to the RNC 25 (step 84). (Step 86)
- the terminal 21 having received the measurement request performs the requested measurement (step 83). Specifically, it measures the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001, and measures the reception field strength of the pilot signals received from the base stations 22, 23, and 1001.
- the terminal 21 that has completed the measurement reports the measurement result to the RNC 25 (step 85). Specifically, it measures the difference between the reception times of the pilot signals from the base stations 22 and 23 and reports the received electric field strength of the pilot signals received from the base stations 22 and 23.
- the RNC 25 receiving the report of the measurement result from the terminal 21 and the base station 22 performs an arithmetic process for specifying the position (Step 89).
- the processing in the arithmetic processing unit 506 of the RNC 25 is the same as that of the first embodiment from F1 to F8, and a description thereof will be omitted.
- the reception electric field strength reported from terminal 21 is compared with the reception electric field strength acquired in F4301, and a point close to the reception electric field strength measured in terminal 21 is specified. After that, the specified point is compared with the calculated positions of the candidate points 13 and 14, and a candidate point close to the specified measured point is specified as the position of the terminal 21.
- one of the two candidate points is specified as the position of terminal 21 based on the reception electric field strength of the pilot signal from base station 22 received by terminal 21.
- a method of specifying the position of the terminal 21 using the propagation status of the pilot signal that flies can be considered.
- the propagation status of the pilot signal from base station 22 is measured at a plurality of points in the sector formed by base station 22 when base station 22 is installed. Specifically, the delay profile at each measurement point is measured. It is assumed that the measured delay profile is stored in the database 507 of the RNC 25 in association with the position of the point where the measurement was performed.
- the RNC 25 transmits a measurement request to the terminal 21 (step 81). Specifically, it requests the terminal 21 to measure the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001, and to measure the delay profile. At this time, auxiliary information necessary for measurement is notified, but the auxiliary information in the present embodiment and the auxiliary information in the first embodiment are the same, and a description thereof will be omitted.
- RNC 25 transmits a measurement request to base station 22 (step 82), and base station 22 that has received the request performs measurement (step 84), and reports the measurement result to RNC 25 ( (Step 86)
- the terminal 21 that has received the measurement request performs the requested measurement (step 83). Specifically, it measures the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001, and measures the reception field strength of the pilot signals received from the base stations 22, 23, and 1001.
- the terminal 21 that has completed the measurement reports the measurement result to the RNC 25 (step 85). Specifically, it measures the difference between the reception times of the pilot signals from the base stations 22 and 23 and reports the delay profile of the pilot signals received from the base stations 22 and 23.
- the RNC 25 receives the report of the measurement results from the terminal 21 and the base station 22, the RNC 25 performs an arithmetic process for specifying the position (Step 89).
- the database 507 is referenced to acquire the delay profile and the coordinates of the point where the measurement was performed. What is acquired is the delay profile measured at the point closest to the position of each of the candidate points 13 and 14 calculated in F8.
- the delay profile reported from terminal 21 is compared with the delay profile acquired in F4301, and a point where a profile close to the delay profile measured in terminal 21 is measured is specified. Specifically, the point where the number of peaks being measured and the time difference between the peaks are close is specified. Thereafter, the specified point is compared with the calculated positions of the candidate points 13 and 14, and a candidate point close to the specified point is specified as the position of the terminal 21.
- one of the two candidate points is determined as the position of terminal 21 based on the received electric field strength and propagation state of the pilot signal received by terminal 21 from base station 22.
- a method of specifying the position of the terminal 21 using the information of the geomagnetism measured by the terminal 21 that is not based on the received electric field strength or the propagation condition is also conceivable.
- the terminal 21 has a function of measuring terrestrial magnetism.
- geomagnetism is measured at a plurality of points in a sector formed by the base station 22.
- the measured geomagnetism is stored in the database 507 of the RNC 25 in association with the position of the point where the measurement was performed.
- the RNC 25 When specifying the position of the terminal 21, the RNC 25 first transmits a measurement request to the terminal 21 (step 81). Specifically, it requests the terminal 21 to measure the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001, and to measure the geomagnetism. At this time, auxiliary information necessary for the measurement is notified, but the auxiliary information in the present embodiment and the auxiliary information in the first embodiment are the same, and a description thereof will be omitted.
- the RNC 25 transmits a measurement request to the base station 22 (Step 82), and the base station 22 that has received the request performs the measurement (Step 84) and reports the measurement result to the RNC 25 ( (Step 86) [0508] Note that the processing in each step is the same as the processing in the first embodiment, and a description thereof will not be repeated.
- the terminal 21 that has received the measurement request performs the requested measurement (step 83). Specifically, it measures the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001, and measures the geomagnetism.
- the terminal 21 that has completed the measurement reports the measurement result to the RNC 25 (step 85). Specifically, the difference between the reception times of the pilot signals from the base stations 22 and 23 and the measured geomagnetism are reported.
- the RNC 25 that has received the report of the measurement results from the terminal 21 and the base station 22 performs an arithmetic process for specifying the position (step 89).
- the processing in the arithmetic processing unit 506 of the RNC 25 is the same as that of the first embodiment from F1 to F8, and a description thereof will be omitted.
- the database 507 is referenced to acquire the geomagnetism and the coordinates of the point where the measurement was performed. What is acquired is the geomagnetism measured at the points closest to and at each of the candidate points 13 and 14 calculated in F8.
- the geomagnetism reported from the terminal 21 is compared with the geomagnetism acquired in F4301, and the point at which a value close to the geomagnetism measured at the terminal 21 is measured is specified. After that, the specified point is compared with the calculated positions of the candidate points 13 and 14, and a candidate point near the specified point is specified as the position of the terminal 21.
- Embodiment 9 Embodiment 9 of the present invention will be described in detail.
- the terminal 21 calculated based on the information of the sector 27 in which the terminal 21 is located, the arrival angle of the signal received by the base station and the terminal, and the reception field strength are calculated.
- one of the two candidate points is specified as the position of the terminal 21, from the calculated candidate points, A method of specifying the position of the terminal 21 using the terrain information is also conceivable.
- the candidate points 13 and 14 may be calculated by finding the intersection of the hyperbola 11 and the circle 12, as in the first and second embodiments.
- the candidate point may be calculated by finding the intersection of the circle 1101 with the circle 1101, or the intersection of the circle 1402 and the circle 1403 may be found by calculating the intersection of the circle 1402 and the circle 1403 as in the fourth embodiment.
- the candidate point may be calculated by finding the intersection of the circle 1402 and the circle 3201 as in the fifth embodiment, but in the description of this embodiment, the intersection of the hyperbola 11 and the circle 12 is calculated.
- the case where the candidate points 13 and 14 are obtained will be described.
- the arithmetic processing for specifying the position of the terminal 21 may be executed by the RNC 25 or may be executed by the terminal 21, but in the description of the present embodiment, the RNC 25 specifies the position of the terminal 21. The processing in the case of performing is described.
- FIG. 52 is a diagram illustrating the principle of the method of specifying one of the two candidate points as the position of the terminal 21 in the present embodiment.
- the RNC 25 When specifying the position of the terminal 21, the RNC 25 first transmits a measurement request to the terminal 21 (step 81). Specifically, the terminal 21 is requested to measure the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001. At this time, the auxiliary information required for measurement is notified. Since the auxiliary information in the present embodiment and the auxiliary information in the first embodiment are the same, the description is omitted.
- the RNC 25 transmits a measurement request to the base station 22 (step 82), and the base station 22 that has received the request performs measurement (step 84), and reports the measurement result to the RNC 25 (step 82). (Step 86)
- the terminal 21 that has received the measurement request performs the requested measurement (step 83). Specifically, the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001 is measured.
- the terminal 21 that has completed the measurement reports the measurement result to the RNC 25 (step 85). Specifically, the measurement of the difference between the reception times of the pilot signals from the base stations 22 and 23 is reported.
- the RNC 25 receiving the report of the measurement result from the terminal 21 and the base station 22 performs an arithmetic process for specifying the position (step 89).
- the processing in the arithmetic processing unit 506 of the RNC 25 is the same as that of the first embodiment up to F1 and F8, and a description thereof will be omitted.
- the arithmetic processing unit 506 of the RNC 25 refers to the database 507 and acquires topographical information of the calculated positions of the candidate points 13 and 14.
- the obtained topographical information of the candidate points 13 and 14 is compared, and if the terminal 21 cannot exist at one of the candidate points, it is excluded from the candidate points.
- the candidate point 14 is a river.
- the terminal 21 cannot exist at the position of the candidate point 14, and the position of the candidate point 13 is specified as the position of the terminal 21.
- the position of the terminal 21 is specified by using the calculated terrain information of the candidate point to exclude the position where the terminal 21 cannot exist, but the altitude information of the candidate point is used.
- a method of specifying the position of the terminal 21 by using the terminal may be considered.
- the database 507 of the RNC 25 stores altitude information of a plurality of points in a sector formed by the base station. Also, it is assumed that the terminal 21 has a function of measuring the altitude of its own position.
- the RNC 25 When specifying the position of the terminal 21, the RNC 25 first transmits a measurement request to the terminal 21. (Step 81). Specifically, it requests the terminal 21 to measure the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001 and to measure the altitude. At this time, auxiliary information necessary for the measurement is notified, but the auxiliary information in the present embodiment and the auxiliary information in the first embodiment are the same, and description thereof will be omitted.
- the RNC 25 transmits a measurement request to the base station 22 (step 82), and the requested base station 22 performs measurement (step 84), and reports the measurement result to the RNC 25 (step 82). (Step 86)
- the terminal 21 having received the measurement request performs the requested measurement (step 83). Specifically, it measures the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001, and measures the altitude of its own position.
- the terminal 21 that has completed the measurement reports the measurement result to the RNC 25 (step 85). Specifically, the measurement result of the difference between the reception times of the pilot signals from the base stations 22 and 23 and the measurement result of the altitude are reported.
- the RNC 25 that has received the reports of the measurement results from the terminal 21 and the base station 22 performs arithmetic processing for position identification (step 89).
- arithmetic processing unit of the RNC25 will be described with reference to FIG.
- the processing in the arithmetic processing unit 506 of the RNC 25 is the same as that of the first embodiment from F1 to F8, and a description thereof will be omitted.
- the arithmetic processing unit 506 of the RNC 25 refers to the database 507 and obtains the calculated altitude of the candidate points 13 and 14.
- the obtained altitude of the candidate points 13 and 14 is compared with the altitude reported from the terminal 21.
- the candidate point having a similar value is specified as the position of the terminal 21.
- the position of the terminal 21 can be specified by using the procedure of FIG.
- Embodiment 10 of the present invention will be described with reference to the drawings.
- the positioning in the past is described in which a method for specifying one of the two candidate points as the position of the terminal 21 using the sector information, the angle of arrival, the received electric field strength, and the map information. Using the result, a method of specifying the position of the terminal 21 is also conceivable.
- the candidate points 13 and 14 may be calculated by finding the intersection of the hyperbola 11 and the circle 12, as in the first and second embodiments.
- the candidate point may be calculated by finding the intersection of the circle 1101 with the circle 1101, or the intersection of the circle 1402 and the circle 1403 may be found by calculating the intersection of the circle 1402 and the circle 1403 as in the fourth embodiment.
- the candidate point may be calculated by finding the intersection of the circle 1402 and the circle 3201 as in the fifth embodiment, but in the description of this embodiment, the intersection of the hyperbola 11 and the circle 12 is calculated.
- the case where the candidate points 13 and 14 are obtained will be described.
- the arithmetic processing for specifying the position of the terminal 21 may be performed by the RNC 25 or may be performed by the terminal 21, but in the description of the present embodiment, the RNC 25 specifies the position of the terminal 21. The processing in the case of performing is described.
- the RNC 25 When specifying the position of the terminal 21, the RNC 25 first transmits a measurement request to the terminal 21 (step 81). Specifically, the terminal 21 is requested to measure the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001. At this time, the auxiliary information required for measurement is notified. Since the auxiliary information in the present embodiment and the auxiliary information in the first embodiment are the same, the description is omitted.
- the RNC 25 transmits a measurement request to the base station 22 (step 82), and the base station 22 that has received the request performs measurement (step 84), and reports the measurement result to the RNC 25 (step 82). (Step 86)
- the terminal 21 that has received the measurement request performs the requested measurement (step 83). Specifically, the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001 is measured. [0561] The terminal 21 that has completed the measurement reports the measurement result to the RNC 25 (step 85). Specifically, the measurement of the difference between the reception times of the pilot signals from the base stations 22 and 23 is reported.
- the RNC 25 that has received the reports of the measurement results from the terminal 21 and the base station 22 performs an arithmetic process for specifying the position (Step 89).
- the arithmetic processing unit of the RNC25 will be described with reference to FIG.
- the processing in the arithmetic processing unit 506 of the RNC 25 is the same as that of the first embodiment up to F1 and F8, and a description thereof will be omitted.
- the arithmetic processing unit 506 of the RNC 25 refers to the database 507 and obtains the latest positioning result among the held positioning results of the terminal 21.
- the distance between the candidate points 13, 14 and the positioning result acquired in F4301 is calculated, and the shorter distance is specified as the position of the terminal 21.
- Embodiments 1 to 10 describe a method of specifying one of the two candidate points as the position of the terminal 21 using the sector information, the angle of arrival, the received electric field strength, the terrain information, and the past positioning result.
- a method of specifying the position of the terminal 21 using the described force S and the building information around the candidate point is also conceivable.
- the candidate points 13 and 14 may be calculated by finding the intersection of the hyperbola 11 and the circle 12 as in the first and second embodiments, or the circle 12 may be calculated as in the third embodiment.
- the candidate point may be calculated by finding the intersection of the circle 1101 with the circle 1101, or the intersection of the circle 1402 and the circle 1403 may be found by calculating the intersection of the circle 1402 and the circle 1403 as in the fourth embodiment.
- the candidate point may be calculated by finding the intersection of the circle 1402 and the circle 3201 as in the fifth embodiment, but in the description of this embodiment, the intersection of the hyperbola 11 and the circle 12 is calculated. The case where the candidate points 13 and 14 are obtained will be described.
- the arithmetic processing for specifying the position of the terminal 21 may be performed by the RNC 25 or may be performed by the terminal 21, but in the description of the present embodiment, the RNC 25 specifies the position of the terminal 21. The processing in the case of performing is described. [0571] It is assumed that the database 507 of the RNC 25 stores building information in a sector formed by the base station, and that the terminal 21 has an imaging function for measuring the building information.
- the RNC 25 When specifying the position of the terminal 21, the RNC 25 first transmits a measurement request to the terminal 21 (step 81). Specifically, it requests the terminal 21 to measure the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001, and to measure the building information. At this time, auxiliary information necessary for measurement is notified, but the auxiliary information in the present embodiment and the auxiliary information in the first embodiment are the same, and description thereof will be omitted.
- the RNC 25 transmits a measurement request to the base station 22 (step 82), and the base station 22 that has received the request performs the measurement (step 84), and reports the measurement result to the RNC 25 (step 82). (Step 86)
- the terminal 21 that has received the measurement request performs the requested measurement (step 83). Specifically, the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001 is measured. In addition, measure building information. Specifically, use the imaging function to shoot the exterior of the surrounding building
- the terminal 21 that has completed the measurement reports the measurement result to the RNC 25 (step 85). Specifically, the measurement results of the difference between the reception times of the pilot signals from the base stations 22 and 23 and the appearance of the surrounding buildings photographed using the imaging function are reported.
- the RNC 25 that has received the reports of the measurement results from the terminal 21 and the base station 22 performs an arithmetic process for specifying the position (Step 89).
- the arithmetic processing unit of the RNC25 will be described with reference to FIG.
- the processing in the arithmetic processing unit 506 of the RNC 25 is the same as that of the first embodiment up to F1 and F8, and a description thereof will be omitted.
- the arithmetic processing unit 506 of the RNC 25 refers to the database 507. And obtain building information around candidate points 13 and 14.
- the appearance of the surrounding building reported from the terminal 21 is compared with the building information around the candidate point acquired in F4301, and the building information that matches the appearance of the building reported from the terminal 21 is provided.
- the specified candidate point is specified as the position of the terminal 21.
- the method for specifying the position of the terminal 21 using the building information is described.
- the two candidate points are calculated by finding the intersection of the circle 1402 and the circle 1403 in the same manner as in the fourth embodiment.
- a method using the orbit information of the GPS satellite is also conceivable.
- RNC 25 holds terminal information, base station information, orbit information of a plurality of GPS satellites, and building information in database 507.
- the RNC 25 requests a measurement to the terminal 21 (Step 81), and the terminal 21 receiving the measurement request performs the requested measurement (Step 83), and when the measurement is completed, reports the measurement result to the RNC 25. (Step 85). Note that the processing in each step is the same as the processing in the fourth embodiment, and a description thereof will not be repeated.
- the RNC 25 requests the base station 22 to measure the round-trip propagation time with the terminal 21 (step 82).
- the round trip propagation time is measured (Step 84), and the measurement result is reported to RNC 25 (Step 86). Note that the processing in each step is the same as the processing described in the first embodiment, and a description thereof will be omitted.
- the RNC 25 receiving the report of the measurement result from the terminal 21 and the base station 22 specifies the position of the terminal 21 (step 83). The details of the processing in this step will be described below with reference to FIG. [0590]
- the processing in the arithmetic processing unit 506 of the RNC 25 is the same as that of the fourth embodiment from F2801 to F2808, and a description thereof will be omitted.
- the arithmetic processing unit 506 of the RNC 25 refers to the database 507, and obtains the orbit information of the GPS satellite 1401 that the terminal 21 succeeded in measuring and the building information around the candidate points 13 and 14 get.
- one of the two candidate points is specified as the position of the terminal 21 using the sector information, the angle of arrival, the received electric field strength, the topographic information, the past positioning result, and the building information.
- a method of specifying a position by using information of a terminal whose position near the terminal 21 is specified may be considered.
- the candidate points 13 and 14 may be calculated by obtaining the intersection of the hyperbola 11 and the circle 12 as in the first and second embodiments, or the circle 12 may be calculated as in the third embodiment.
- the candidate point may be calculated by finding the intersection of the circle 1101 with the circle 1101, or the intersection of the circle 1402 and the circle 1403 may be found by calculating the intersection of the circle 1402 and the circle 1403 as in the fourth embodiment.
- the candidate point may be calculated by finding the intersection of the circle 1402 and the circle 3201 as in the fifth embodiment, but in the description of this embodiment, the intersection of the hyperbola 11 and the circle 12 is calculated. The case where the candidate points 13 and 14 are obtained will be described.
- the arithmetic processing for specifying the position of the terminal 21 may be performed by the RNC 25 or may be performed by the terminal 21, but in the description of the present embodiment, the RNC 25 specifies the position of the terminal 21. The processing in the case of performing is described.
- the RNC 25 includes the sector 27 in addition to the terminal information and the base station information. It is assumed that the location information of the terminal whose detailed location is known among the terminals located in the database is stored in the database 507 and then returned.
- the RNC 25 When specifying the position of the terminal 21, the RNC 25 first transmits a measurement request to the terminal 21 (step 81). Specifically, the terminal 21 is requested to measure the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001. At this time, auxiliary information necessary for measurement is notified, but the auxiliary information in the present embodiment and the auxiliary information in the first embodiment are the same, and a description thereof will be omitted.
- the RNC 25 sends a measurement request to the base station 22 (step 82), and the base station 22 that has received the request performs the measurement (step 84) and reports the measurement result to the RNC 25 (step 82). (Step 86)
- the terminal 21 that has received the measurement request performs the requested measurement (step 83). Specifically, the difference between the reception times of the pilot signals from the base stations 22, 23, and 1001 is measured.
- the terminal 21 that has completed the measurement reports the measurement result to the RNC 25 (step 85). Specifically, the measurement result of the difference between the reception times of the pilot signals from the base stations 22 and 23 is reported.
- the RNC 25 that has received the reports of the measurement results from the terminal 21 and the base station 22 performs an arithmetic process for specifying the position (Step 89).
- the processing in the arithmetic processing unit 506 of the RNC 25 will be described with reference to FIG.
- the processing in the arithmetic processing unit 506 of the RNC 25 is the same as that of the first embodiment from F1 to F8, and description thereof will be omitted.
- the arithmetic processing unit 506 of the RNC 25 refers to the database 507 and acquires the position information of the terminals other than the terminal 21 existing in the sector 27.
- the position information of the terminal other than the terminal 21 acquired in F4301 is compared with the positions of the candidate points 13 and 14, and a candidate near the position of the terminal other than the terminal 21 existing in the sector 27 is determined. Identify the point as the location of terminal 21.
- a force that the RNC 25 performs the arithmetic processing is performed by an arithmetic processing device different from the RNC 25. The calculation may be performed.
- Fig. 54 is a drawing showing the configuration of the mobile communication network in this embodiment.
- the positioning calculation processing device 4601 connected to the fixed network 24 performs calculation for specifying the position of the terminal 21.
- Fig. 55 is a drawing showing the configuration of the positioning calculation processing device 4601.
- the RNC I / F4701 is an interface that connects a plurality of RNCs and the positioning calculation processing device 4601.
- the message processing unit 4702 notifies the operation control unit 4703 of the reception of the message from the RNC.
- a message is transmitted to the RNC.
- the operation control unit 4703 requests the arithmetic processing unit 4704 to perform arithmetic processing according to the message notified from the message processing unit 4702, and transmits a message including the arithmetic result reported from the arithmetic processing unit 4704. Request to message processing unit 4702. Also, it obtains necessary information by referring to the database 4705 as required, and requests the message processing unit 4702 to transmit a message including the obtained information.
- Arithmetic processing section 4704 performs arithmetic processing for specifying the position of the terminal in response to a request from operation control section 4703, and reports the processing result to operation control section 4703. Also the database
- the database 4705 holds information necessary for arithmetic processing and measurement. Also external
- Fig. 56 is a drawing showing the configuration of the RNC 25 in the present embodiment. Parts not related to the description of the present embodiment are not shown in the figure.
- the base station I / F section 501, NBAP message processing section 502, and RRC message processing section 503 are the same as those described in the first embodiment, and a description thereof will be omitted.
- the arithmetic unit I / F4801 is an interface for connecting the positioning arithmetic processing unit 4601 and the RNC 25.
- the message processing unit 4802 notifies the positioning sequence control unit 4803 of the notification of the message from the positioning calculation processing device 4601, and performs positioning calculation processing in response to a request from the positioning control unit 4802 and the connection control unit 4804. Send message to device 4601.
- Positioning sequence control section 4802 requests RRC message processing section 503 or NBAP message processing section 502 to transmit a message for requesting a measurement to a terminal or a base station, and RRC message processing section 503 or NBAP In response to the message notified from the message processing unit 502 of reception, the message processing unit 4802 is requested to transmit the message.
- connection control unit 4804 requests the RRC message processing unit 503 or the NBAP message processing unit 502 to transmit a message for establishing a connection with the terminal, and the RRC message processing unit 503 or the NBAP message processing unit. In response to the message notified of receipt from 502, it requests the message processing unit 4802 to transmit the message.
- Fig. 57 shows that a connection is established between terminal 21 and RNC 25, and the terminal executed thereafter.
- 21 is a diagram showing a procedure for specifying the position of 21.
- the RNC 25 Upon receiving the connection establishment request from the terminal 21, the RNC 25 notifies the positioning calculation processing device 4601 of the terminal information (step 4901).
- the positioning calculation processing device 4601 having received the notification from the RNC 25 generates terminal information based on the received terminal information, and stores the generated terminal information in the database 4705 (step 4902).
- the RNC 25 requests the positioning calculation processing device 4601 to notify auxiliary information necessary for measurement (step 4903).
- the positioning calculation processing device 4601 refers to the database 4705, generates auxiliary information, and notifies the RNC 25 of the generated auxiliary information. (Step 4904).
- step 4905 Request arithmetic processing to 4601 (step 4905). At this time, the measurement results from the terminal 21 and the base station 22 are simultaneously notified.
- the positioning operation processing device 4601 that has received the operation processing request from the RNC 25 specifies the position of the terminal 21 using the notified measurement result and the base station information stored in the database 4705 (step 4906) ).
- the positioning calculation processing device 4601 reports the specified position of the terminal 21 to the RNC 25 (step 4907).
- the present invention relates to the field of mobile radio communications, and can be applied to any method used in determining a geographical position of a mobile station in a mobile communication network. There is no limitation on the availability.
- FIG. 1 is a drawing showing the principle of GPS positioning.
- FIG. 2 is a drawing showing the principle of OTDOA positioning.
- FIG. 3 is a drawing showing the principle of AFLT positioning.
- FIG. 4 is a drawing showing the principle of a positioning method using both signals from GPS satellites and signals from base stations.
- FIG. 5 is a drawing showing the principle of specifying the position of the terminal 21 in the first embodiment.
- FIG. 6 is a drawing showing a mobile communication network in a first embodiment.
- FIG. 7 is a drawing showing a procedure for establishing a connection between the terminal 21 and the RNC 25 in the first embodiment.
- FIG. 8 is a drawing showing an example of terminal information 30 held by the RNC 25 in the first embodiment.
- FIG. 9 is a drawing showing a procedure for establishing a connection between the terminal 21 and the RNC 25 in the first embodiment.
- FIG. 10 is a diagram illustrating an example of terminal information 30 held by the RNC 25 according to the first embodiment.
- FIG. 11 is a drawing showing an example of base station information 40 held and held by the RNC 25 in the first embodiment.
- FIG. 12 is a drawing showing an example of base station information 40 held by the RNC 25 in the first embodiment.
- FIG. 13 is a drawing showing a configuration of an RNC 25 in the first embodiment.
- FIG. 14 is a drawing showing terminal information of the terminal 21 held by the database 507 of the RNC 25 in the first embodiment.
- FIG. 15 is a drawing showing base station information of the base stations 22 and 23 held in the database 507 of the RNC 25 in the first embodiment.
- FIG. 16 is a drawing showing an example of a procedure for specifying the position of the terminal 21 in the first embodiment
- FIG. 17 is a drawing showing the flow of processing in step 89 in the first embodiment.
- FIG. 18 is a drawing showing an example of a procedure for specifying the position of the terminal 21 in another mode 1 of the first embodiment.
- FIG. 19 is a drawing showing the flow of processing in step 89 in another mode 1 of the first embodiment.
- FIG. 20 is a drawing showing a configuration of a terminal 21 according to the second embodiment.
- FIG. 21 is a diagram showing an example of a procedure for specifying the position of the terminal 21 in the second embodiment
- FIG. 22 is a drawing showing the flow of processing in step 98 in the second embodiment.
- FIG. 23 is a diagram showing an example of a procedure for specifying the position of the terminal 21 according to another mode 1 of the second embodiment.
- FIG. 24 is a drawing showing the flow of processing in step 98 in another mode 1 of the second embodiment.
- FIG. 25 is a drawing showing the principle of specifying the position of the terminal 21 in the third embodiment.
- FIG. 26 is a drawing showing an example of a procedure for specifying the position of the terminal 21 in the third embodiment.
- FIG. 27 is a drawing showing the flow of processing in step 1213 in the third embodiment.
- FIG. 28 is a diagram showing an example of a procedure for specifying the position of the terminal 21 in another mode 1 of the third embodiment.
- FIG. 29 is a diagram showing the flow of the process in step 1302 in another mode 1 of the third embodiment.
- FIG. 30 is a drawing showing the principle of specifying the position of the terminal 21 in the fourth embodiment.
- FIG. 31 is a drawing showing a configuration of a terminal 21 in the fourth embodiment.
- FIG. 32 is a drawing showing the flow of the process in step 89 in the fourth embodiment.
- FIG. 33 is a view showing a flow of a process in step 98 in another mode 1 of the fourth embodiment.
- FIG. 34 is a diagram showing a processing flow in step 89 in another mode 3 of the fourth embodiment.
- FIG. 35 is a view showing a processing flow in step 98 in another mode 3 of the fourth embodiment.
- FIG. 36 is a drawing showing the principle of specifying the position of the terminal 21 in the fifth embodiment.
- FIG. 37 is a drawing showing an example of the procedure for specifying the position of the terminal 21 in the fifth embodiment.
- FIG. 38 is a drawing showing the flow of processing in step 89 in the fifth embodiment.
- FIG. 39 is a drawing showing an example of the procedure for specifying the position in another mode 1 of the fifth embodiment.
- FIG. 40 is a drawing showing the flow of processing in Step 98 in another mode 1 of the fifth embodiment.
- FIG. 41 is a diagram showing a procedure for specifying the position of the terminal 21 in another mode 4 of the fifth embodiment.
- FIG. 42 is a drawing showing details of the flow of processing executed in arithmetic processing section 506 of RNC 25 in step 5405.
- FIG. 43 is a diagram showing a procedure for specifying the position of the terminal 21 in another mode 5 of the fifth embodiment.
- FIG. 44 is a diagram showing a flow of processing in the arithmetic processing unit 2406 of the terminal 21 in step 5604.
- FIG. 45 is a drawing showing the principle of specifying the position of the terminal 21 in the sixth embodiment.
- FIG. 46 is a drawing showing the flow of the process in step 89 in the sixth embodiment.
- FIG. 47 is a drawing showing the flow of processing in Step 98 in another mode 1 of the sixth embodiment.
- FIG. 48 is a drawing showing the principle of specifying the position of the terminal 21 in the seventh embodiment.
- FIG. 49 is a drawing showing the flow of the process in step 89 in the seventh embodiment.
- FIG. 50 is a drawing showing the flow of processing in Step 98 in another embodiment 1 of the seventh embodiment.
- FIG. 51 is a drawing showing the flow of the process in step 89 in the eighth embodiment.
- FIG. 52 is a drawing showing the principle of specifying the position of the terminal 21 in the ninth embodiment.
- FIG. 53 is a drawing showing the flow of processing in Step 89 in another embodiment of the eleventh embodiment.
- FIG. 54 is a drawing showing a mobile communication network in a thirteenth embodiment.
- FIG. 55 is a drawing showing a configuration of a positioning calculation processing device 4601 in a thirteenth embodiment.
- FIG. 56 is a drawing showing the configuration of the RNC 25 in Embodiment 13.
- FIG. 57 is a diagram showing a procedure for establishing a connection between the terminal 21 and the RNC 25 and specifying the position of the terminal 21 in the thirteenth embodiment.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005512536A JPWO2005012939A1 (ja) | 2003-07-31 | 2004-07-30 | 端末位置特定方法及びそのシステム |
EP04748133A EP1655619A1 (en) | 2003-07-31 | 2004-07-30 | Terminal position identification method and system thereof |
US10/566,800 US20070063897A1 (en) | 2003-07-31 | 2004-07-30 | Terminal location specification method and system of the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-284105 | 2003-07-31 | ||
JP2003284105 | 2003-07-31 |
Publications (1)
Publication Number | Publication Date |
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WO2005012939A1 true WO2005012939A1 (ja) | 2005-02-10 |
Family
ID=34113831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/010972 WO2005012939A1 (ja) | 2003-07-31 | 2004-07-30 | 端末位置特定方法及びそのシステム |
Country Status (5)
Country | Link |
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US (1) | US20070063897A1 (ja) |
EP (1) | EP1655619A1 (ja) |
JP (1) | JPWO2005012939A1 (ja) |
CN (1) | CN1864076A (ja) |
WO (1) | WO2005012939A1 (ja) |
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Cited By (27)
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JP2006071389A (ja) * | 2004-09-01 | 2006-03-16 | Nec Saitama Ltd | 移動通信システム、携帯端末装置及びそれらに用いる携帯端末位置測位方法並びにそのプログラム |
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CN1852591B (zh) * | 2005-10-31 | 2010-04-07 | 华为技术有限公司 | 一种定位移动终端的方法 |
JP2007192771A (ja) * | 2006-01-23 | 2007-08-02 | Mitsubishi Electric Corp | 測位携帯端末、携帯端末の位置特定方法、携帯端末の位置特定システム及び携帯端末を利用したセキュリティシステム |
JP2007218868A (ja) * | 2006-02-20 | 2007-08-30 | Mitsubishi Electric Corp | 移動局の位置検出方法及びその移動局、位置検出装置、基地局 |
JP2008011451A (ja) * | 2006-06-30 | 2008-01-17 | Ntt Docomo Inc | 位置測定システム及び位置測定方法 |
JP2008051681A (ja) * | 2006-08-25 | 2008-03-06 | Seiko Epson Corp | 測位装置、その制御方法、制御プログラム及びその記録媒体 |
JP2008215924A (ja) * | 2007-03-01 | 2008-09-18 | Seiko Epson Corp | 測位装置、測位方法及びプログラム |
JP2009010638A (ja) * | 2007-06-27 | 2009-01-15 | Ntt Docomo Inc | 位置推定システム |
US8121621B2 (en) | 2007-06-27 | 2012-02-21 | Ntt Docomo, Inc. | Position estimation system |
US8285304B2 (en) | 2007-07-20 | 2012-10-09 | Ntt Docomo, Inc. | Radio communication system and position information providing apparatus |
JP2009027546A (ja) * | 2007-07-20 | 2009-02-05 | Ntt Docomo Inc | 無線通信システム |
WO2009014096A1 (ja) * | 2007-07-20 | 2009-01-29 | Ntt Docomo, Inc. | 無線通信システム及び位置情報提供装置 |
JP2011511269A (ja) * | 2007-12-24 | 2011-04-07 | クゥアルコム・インコーポレイテッド | 統合ワイヤレスデバイスロケーション決定のための方法、システムおよび装置 |
JPWO2009157076A1 (ja) * | 2008-06-26 | 2011-12-01 | パイオニア株式会社 | 通信環境予測端末、通信環境予測方法及び通信環境予測プログラム |
WO2009157076A1 (ja) * | 2008-06-26 | 2009-12-30 | パイオニア株式会社 | 通信環境予測端末、通信環境予測方法及び通信環境予測プログラム |
JP2010019597A (ja) * | 2008-07-08 | 2010-01-28 | Fujitsu Ltd | 測位システムおよび測位基地局群 |
WO2010122778A1 (ja) * | 2009-04-22 | 2010-10-28 | 日本電気株式会社 | 位置情報算出システム、方法、及び装置、並びに補正値算出装置、及びプログラム |
WO2011114531A1 (ja) * | 2010-03-19 | 2011-09-22 | スカパーJsat株式会社 | 静止人工衛星の位置測定システム |
US9638785B2 (en) | 2010-03-19 | 2017-05-02 | Sky Perfect Jsat Corporation | Position measurement system for geostationary artificial satellite |
JP2015043487A (ja) * | 2013-08-26 | 2015-03-05 | 株式会社Nttドコモ | 情報処理装置及び位置測位方法 |
JPWO2022239055A1 (ja) * | 2021-05-10 | 2022-11-17 | ||
WO2022239055A1 (ja) * | 2021-05-10 | 2022-11-17 | 三菱電機株式会社 | 測位装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2005012939A1 (ja) | 2007-09-27 |
US20070063897A1 (en) | 2007-03-22 |
CN1864076A (zh) | 2006-11-15 |
EP1655619A1 (en) | 2006-05-10 |
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