WO2008013263A1 - Terminal de communication mobile et procédé de positionnement gps - Google Patents

Terminal de communication mobile et procédé de positionnement gps Download PDF

Info

Publication number
WO2008013263A1
WO2008013263A1 PCT/JP2007/064765 JP2007064765W WO2008013263A1 WO 2008013263 A1 WO2008013263 A1 WO 2008013263A1 JP 2007064765 W JP2007064765 W JP 2007064765W WO 2008013263 A1 WO2008013263 A1 WO 2008013263A1
Authority
WO
WIPO (PCT)
Prior art keywords
gps
gps positioning
positioning
satellite
satisfied
Prior art date
Application number
PCT/JP2007/064765
Other languages
English (en)
Japanese (ja)
Inventor
Akihiro Tsutsui
Takafumi Yamamoto
Original Assignee
Ntt Docomo, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ntt Docomo, Inc. filed Critical Ntt Docomo, Inc.
Priority claimed from JP2007195281A external-priority patent/JP4727628B2/ja
Publication of WO2008013263A1 publication Critical patent/WO2008013263A1/fr

Links

Classifications

    • 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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/396—Determining accuracy or reliability of position or pseudorange measurements

Definitions

  • the present invention relates to a mobile communication terminal capable of specifying a location by GPS positioning, and a GPS positioning method by the mobile communication terminal.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 2004-245657
  • the GPS positioning is unconditionally stopped when a predetermined stop condition is satisfied, for example, when a certain period of time elapses in consideration of the user's standby time and the like. It was. However, according to the above method, there is a risk that if the GPS positioning is continued as it is, the positioning is stopped even if the positioning is successful.
  • the present invention has been made to solve the above-described problems, and can prevent the positioning from being stopped when the GPS positioning can be performed and appropriately perform the GPS positioning.
  • the purpose is to provide a mobile communication terminal and GPS positioning method.
  • a mobile communication terminal has a receiving means capable of receiving a positioning signal from a GPS satellite, and a mobile communication terminal capable of specifying a location by GPS positioning.
  • the satellite acquisition means for acquiring GPS satellites
  • the acquisition number measurement means for measuring the number of acquisitions of GPS satellites acquired by the satellite acquisition means, and whether or not the GPS positioning stop condition is satisfied based on predetermined conditions!
  • the GPS positioning stop determining means determines that the GPS positioning stop condition is satisfied, the GPS positioning is stopped, and the GPS positioning stop determining means satisfies the GPS positioning stop condition.
  • GPS positioning control means for continuing the GPS positioning when it is determined that the GPS positioning is stopped
  • the GPS positioning stop determining means is a positioning state of GPS positioning, a capturing state of the GPS satellites by the satellite capturing means, and a capturing number measuring means Based on at least one of the measurement results of the number of GPS satellites captured by It is characterized by determining whether or not to continue GPS positioning and determining that GPS positioning is to be continued if it is determined that GPS positioning is to be continued! /.
  • the mobile communication terminal based on a predetermined condition, it is determined whether or not the GPS positioning stop condition is satisfied. When it is determined that the GPS positioning stop condition is satisfied, the GPS positioning is determined. Canceled. The mobile communication terminal also determines whether to continue GPS positioning based on at least one of the positioning status of GPS positioning, the acquisition status of GPS satellites, and the measurement result of the number of acquisitions of GPS satellites. If it is determined to continue, it is determined that the GPS positioning stop condition is not satisfied. That is, based on at least one of the positioning status of GPS positioning, the acquisition status of GPS satellites, and the measurement result of the number of acquisitions of GPS satellites, it is estimated whether GPS positioning is possible and the continuation of GPS positioning is determined. . As a result, it is possible to prevent the positioning from being stopped when GPS positioning can be possible, and to properly perform GPS positioning with the force S.
  • the GPS positioning stop determination means determines whether or not the GPS positioning stop time set based on the number of acquisitions measured by the acquisition number measuring means! Therefore, it is desirable to determine that the GPS positioning stop condition is satisfied, and that the GPS positioning stop condition is not satisfied if it has not elapsed. The more the number of captures measured by the number-of-captures measurement means, the less likely the positioning results will be obtained if GPS positioning is continued! ,. By setting the GPS positioning stop time based on the number of GPS satellites captured, the GPS positioning stop time can be set depending on the possibility of obtaining a positioning result, and whether or not the GPS positioning stop time has elapsed. By determining whether or not the GPS positioning stop determination condition is satisfied, it is possible to prevent the positioning from being stopped when GPS positioning can be possible, and to perform GPS positioning appropriately.
  • the GPS positioning stop determination means determine whether or not the GPS positioning stop condition is satisfied based on the number of acquisitions measured by the acquisition number measuring means! To capture number measurement Therefore, if the number of captured measurements is small, the possibility of obtaining positioning results even if GPS positioning is continued is low. On the other hand, if the number of captures is large, there is a high possibility that GPS positioning will be continued and positioning results will be obtained. In other words, the number of captures is a suitable index for determining whether or not to stop GPS positioning. Therefore, according to this configuration, it is possible to prevent the positioning from being stopped when the GPS positioning can be performed, and to perform the GPS positioning appropriately.
  • the GPS positioning stop determining means determines that the GPS positioning is continued when the position of the terminal itself can be calculated by the GPS positioning.
  • the GPS positioning stop judging means detects that the reception level of the positioning signal received by the receiving means is below the level that can be used for GPS positioning and the force frequency is exceeded! / It is desirable to determine that GPS positioning will continue if the catching means detects it.
  • the reception level may indicate the strength of the received signal, or may indicate the quality of the received signal, such as the ratio of noise to the signal.
  • the GPS positioning stop determining means determines that the GPS positioning is continued when the number of GPS satellites captured by the capturing number measuring means is greater than or equal to a preset number.
  • the GPS positioning stop determination means calculates the accuracy of the GPS satellite capture number measured by the capture number measurement means based on the time change of the GPS satellite capture number measured by the capture number measurement means, It is desirable to determine whether or not to continue GPS positioning based on this.
  • the present invention can be described as an invention of a GPS positioning method as described below, in addition to being described as an invention of a mobile communication terminal as described above.
  • This is substantially the same invention only in different categories, and has the same operations and effects.
  • the GPS positioning method is a GPS positioning method by a mobile communication terminal having a receiving means capable of receiving a positioning signal from a GPS satellite and capable of specifying a location by GPS positioning.
  • a satellite acquisition step for acquiring GPS satellites a capture number measurement step for measuring the number of acquisitions of the GPS satellites acquired by the satellite acquisition step V, and a predetermined acquisition step.
  • a GPS positioning control step for continuing GPS positioning when it is determined that the GPS positioning stop condition is not satisfied in the GPS positioning stop determination step.
  • the positioning status of the GPS positioning, satellite acquisition It is determined whether to continue the GPS positioning by determining whether to continue the GPS positioning based on at least one of the acquisition state of the GPS satellites in the step and the measurement result of the number of GPS satellites acquired in the acquisition number measurement step. If it is detected, the GPS positioning stop condition is not met!
  • GPS positioning it is estimated whether GPS positioning can be performed based on at least one of the positioning status of GPS positioning, the capture status of GPS satellites, and the measurement result of the number of captures of GPS satellites. Since continuation is determined, it is possible to prevent GPS positioning from being stopped when GPS positioning can be possible, and to perform GPS positioning appropriately.
  • FIG. 1 is a functional block diagram of an embodiment of a mobile communication terminal according to the present invention.
  • FIG. 2 is a hardware block diagram of the mobile communication terminal according to FIG.
  • FIG. 3 is a flowchart showing an operation procedure of a GPS positioning method.
  • FIG. 4 is a diagram showing a first sky plot.
  • FIG. 5 A graph showing the relationship between the location of a mobile communication terminal and the waiting time required for GPS positioning.
  • FIG. 6 is a diagram showing a second sky plot.
  • FIG. 7 is a flowchart showing a procedure for calculating the accuracy of the number of captured GPS satellites.
  • FIG. 8 is a graph showing changes in the number of GPS satellites captured according to positioning time.
  • FIG. 9 is a flowchart showing a procedure for determining whether or not to stop.
  • FIG. 10 is a functional block diagram of an embodiment of a positioning server according to the present invention.
  • a mobile phone mobile communication terminal
  • mobile communication terminal mobile communication terminal
  • FIG. 1 is a block diagram showing a functional configuration of the mobile communication terminal 1.
  • the mobile communication terminal 1 includes a communication unit (communication means) 2 that performs wireless communication with the base station 100 and a GPS reception unit (reception means) that can receive a positioning signal from a GPS satellite. 3 and a GPS positioning unit 4 that performs arithmetic processing for GPS positioning based on positioning signals from GPS satellites.
  • the three GPS satellites G1 to G3 in FIG. 1 are examples of GPS satellites received by the mobile communication terminal 1. In Fig. 1, only three GPS satellites are shown, but usually, signals from many (about 10) GPS satellites are received!
  • the mobile communication terminal 1 is captured by the GPS satellite capturing unit (satellite capturing unit) 5 that captures the GPS satellite based on the positioning signal received by the GPS receiving unit 3 and the GPS satellite capturing unit 5.
  • the acquisition number measurement unit (capture number measurement means) 6 that measures the number of GPS satellites, and whether or not the GPS positioning stop condition is satisfied based on the number of GPS satellites (capture number) measured by the acquisition number measurement unit 6
  • GPS positioning control unit (GPS positioning control means) 8 that stops GPS positioning based on the determination result of GPS positioning stop determination unit 7, and base station
  • a base station using positioning unit 9 that performs positioning based on data transmitted from 100.
  • the mobile communication terminal 1 includes a display unit 11 that outputs positioning results, and a time storage unit 12 that stores waiting time (GPS positioning stop time) required for GPS positioning in association with the number of GPS satellites captured. And a visible satellite information storage unit 13 that stores information on the visible satellites captured by the GPS satellite capturing unit 5, and a GPS satellite orbit information storage unit 14 that stores the orbit information of the GPS satellites.
  • FIG. 2 is a hardware configuration diagram of the mobile communication terminal 1.
  • the communication terminal 1 physically includes a CPU 21, RAM 22, ROM 23, operation unit 24, display 25, a wireless communication module 26 that is a data transmission / reception device, a GPS receiver 27 that receives a positioning signal from a GPS satellite, and the like. Consists of.
  • Each function of the mobile communication terminal 1 is loaded with predetermined software on hardware such as the CPU 21 and RAM 22, and under the control of the CPU 21, the wireless communication module 26, the GPS receiver 27, the operation unit 24 This is realized by operating the display 25 and reading and writing data in the RAM 22.
  • the communication unit 2 transmits and receives data to and from the base station 100 via the network, and mainly has a voice call function.
  • the data obtained from the base station 100 includes base station position information such as latitude and longitude of the base station 100 and distance information from the base station 100 to the mobile communication terminal 1 as positioning related information usable for positioning.
  • Mobile communication terminal 1 adopts a cell system, and it is possible to specify the assumed terminal position indicated as the assumed position of mobile communication terminal 1 based on the zone in which wireless communication with base station 100 is possible.
  • the GPS receiver 3 can receive a positioning signal transmitted from a GPS satellite.
  • the positioning signal received from the GPS satellite to the GPS receiver 3 includes Sv (t) ID (identification information) for identifying and identifying the GPS satellite, orbit data and time data of the GPS satellite.
  • the positioning signal received from the GPS satellite to the GPS receiver 3 varies in signal strength (level) depending on the observation conditions (such as weather, indoor or outdoor) where the mobile communication terminal 1 is located.
  • the reception sensitivity of the GPS receiver 3 is set so that the signal can be received at least when the signal strength of the positioning signal exceeds a level that can be used for GPS positioning (for example, 135 dBm or more). In most cases, signals below the level that can be measured can be received.
  • the GPS positioning unit 4 extracts GPS satellite position information stored as visible satellite position information in a visible satellite position information storage unit 13a, which will be described later, and further, from each of a plurality of GPS satellites. Obtain the arrival time difference of the transmitted positioning signals and move from the arrival time difference. Performs GPS positioning to obtain the positioning result (latitude, longitude, altitude) of the communication terminal 1 by calculation processing
  • the GPS satellite capturing unit 5 extracts the Sv (t) ID from the positioning signal received by the GPS receiving unit 3, and identifies the GPS satellite from which the Sv (t) ID can be extracted as a visible satellite.
  • the orbit data and time data when the positioning signal is generated are extracted from the positioning signal, and the GPS satellite position information at the time when the positioning signal is generated is obtained.
  • a positioning level of a predetermined positioning signal above the level where positioning is possible
  • orbit data may be acquired from the base station by the communication unit 2. For example, it is possible for the base station to transmit GPS satellite orbit data that may be captured in its own cell.
  • the GPS satellite capturing unit 5 associates this position information with the Sv (t) ID extracted from the positioning signal, and stores it in the visible satellite position information storage unit 13a described later as the position information of the visible satellite.
  • the GPS satellite capture unit 5 captures GPS satellites based on positioning signals with high signal strength in order to identify a GPS satellite having a reception level (signal strength) from which Sv (t) ID can be extracted as a visible satellite. be able to. For example, if the positioning signal from a GPS satellite does not reach the GPS receiver 3 directly and reaches a certain obstacle, the signal strength decreases. Even if GPS positioning is performed based on a positioning signal with such a low signal strength, the GPS positioning result becomes inaccurate, and it takes too much time S to obtain the positioning result.
  • the GPS receiving unit 3 does not satisfy the positioning possible level! / And also receives positioning signals of GPS satellites, and these positioning signals are also used in the mobile communication terminal 1 according to the present embodiment as will be described later. .
  • the GPS satellite capturing unit 5 continuously captures GPS satellites at predetermined timing intervals. Then, every time the GPS satellite acquisition unit 5 repeats the acquisition after the first acquisition after the GPS positioning is started (every time the acquisition result is reported), the acquisition time and the acquired GPS
  • the Sv (t) ID of the satellite is associated and stored in the visible satellite history storage unit 13b described later.
  • the Sv (t) ID of the GPS satellites stored in the visible satellite history storage unit 13b is referred to when determining whether the GPS satellites repeatedly captured are the same.
  • the captured number measurement unit 6 measures the number of captured GPS satellites by counting Sv (t) IDs as visible satellites stored in the visible satellite position information storage unit 13a, and captures a flag memory (not shown) Is set to the value corresponding to the number of captures. For example, if the captured force S is “0” or “1”, set “1”, if it is “2”, set “2”, and if it is “3” or more, set “3”. Set up.
  • the GPS positioning stop determination unit 7 determines whether or not the GPS positioning stop condition is satisfied based on a predetermined condition. Specifically, the determination is performed as follows.
  • the GPS positioning stop determination unit 7 refers to the value set in the captured number flag memory, searches the time storage unit 12 based on the value, and waits for GPS positioning (GPS positioning stop time),, ⁇ , Extract T. here,
  • the waiting time is the shortest “ ⁇ ” (sec), and when “3”, the waiting time is the longest “T” (sec. ), And in the case of “2”, ⁇
  • T is intermediate between “T” (sec) and “T” (sec). GPS satellite capture unit within a specified time 5
  • the standby time is set to be short if it is short and long.
  • the waiting time is the shortest “T” (sec), and “2”.
  • the standby time is the longest “T” (sec), and in the case of “1”, “T” (sec) and “T j (sec)”
  • the GPS positioning stop determination unit 7 determines whether or not the elapsed time t from the start of GPS positioning has exceeded the standby time “ ⁇ ”. If yes, it is determined that the GPS positioning stop condition is satisfied, and a value indicating GPS positioning stop is set in a GPS positioning stop flag memory (not shown). On the other hand, the processing when the waiting time “ ⁇ ” has not been exceeded will be described later.
  • the GPS positioning stop determination unit 7 extracts the standby time “ ⁇ ” from the time storage unit 12, the elapsed time t from the start of GPS positioning exceeds the standby time “ ⁇ ”.
  • the GPS positioning stop determination unit 7 extracts the standby time "T" from the time storage unit 12,
  • GPS positioning stop flag memory not shown
  • the visible satellite history storage unit 13b described later is used.
  • the same Sv (t) ID of GPS satellites that are repeatedly acquired means that only the same GPS satellites can be acquired over time, and even if GPS positioning is continued. It is unlikely that the number of acquisitions of GPS satellites will increase. Therefore, when the Sv (t) ID of the GPS satellites is the same, it is determined that the positioning result by GPS positioning can be obtained in a short time by determining that the first stop condition is satisfied. Can be improved. As a result, it is possible to prevent the waiting time required for GPS positioning from being wasted time for the user of the mobile communication terminal 1, and it is also possible to prevent the positioning from being stopped when GPS positioning can be performed. GPS positioning can be performed appropriately.
  • the GPS positioning stop determination unit 7 refers to the visible satellite position information storage unit 13a described later, and stores the two stored in the visible satellite position information storage unit 13a. It is determined from the position information of the visible satellites whether or not the angle between Sv (t) IDs, that is, the angle between the two visible satellites is less than or equal to a predetermined value ⁇ , and the elevation angle of each visible satellite is within a predetermined range. Determine if there is. If the angle between the two visible satellites is less than or equal to the predetermined value ⁇ and both elevation angles of the two visible satellites are included in the predetermined range, the position information of the visible satellite is obtained. Based on the above, it is determined that the second cancellation condition is satisfied. If at least one of the conditions is not satisfied, it is determined that the second cancellation condition is not satisfied.
  • FIG. 4 is a diagram showing the first sky plot SP1, which is created around the assumed terminal position P specified based on the base station position information transmitted from the base station 100, and is orthogonal. Of the two axes, the direction indicating “0 °” indicates north, the direction indicating “90 °” indicates east, the direction indicating “180 °” indicates south, and the direction indicating “270 °” indicates west.
  • the sky plot is G in the sky The coordinates of the PS satellite are illustrated.
  • the elevation angle is shown concentrically around the assumed terminal position P, and the center is the zenith (elevation angle 90 °), and the elevation angle decreases as the distance from the assumed terminal position P increases.
  • the angle between two visible satellites is, for example, as shown in Fig. 4, where the coordinates Ga, Gb of the first visible satellite and the second visible satellite are written in the coordinates on the first sky plot SP1.
  • the GPS positioning stop determination unit 7 determines whether this angle is equal to or smaller than a predetermined value ⁇ (for example, 90 °).
  • the GPS positioning stop determination unit 7 has an elevation angle obtained from the positions Ga and Gb on the first sky plot SP1 equal to or higher than a predetermined elevation angle ⁇ 1 (for example, 6 °) and a predetermined elevation angle ⁇ 2 (for example, , 50 °).
  • the mobile communication terminal 1 When the visible satellites are confined in a narrow area, it is highly likely that the mobile communication terminal 1 is located indoors because the possibility that the visible satellites are captured through a window or the like is high. In addition, if it is assumed that the visible satellite capture area is not in the zenith direction because the elevation angle of the visible satellite is small, the mobile communication terminal 1 is likely to be located indoors in a building with a roof or the like. Yes. When the mobile communication terminal 1 is in such a position, it is unlikely that positioning results can be obtained in a short time even if GPS positioning is continued.
  • the GPS positioning stop determination unit 7 extracts the first acquisition upper limit number Ml with reference to a capturing number storage unit (not shown), and the GPS satellite capturing unit 5 The number of GPS satellite acquisitions by the number of acquisitions reaches the maximum number of acquisitions Ml! /, Whether or not it is determined whether or not the number of acquisitions has reached the maximum number of acquisitions Ml. 3 Judge that the cancellation condition is satisfied. On the other hand, if the second cancellation condition is not satisfied, the second acquisition upper limit number M2 is extracted by referring to the acquisition number storage unit (not shown), and the GPS satellite acquisition unit 5 determines the number of acquisition times of the GPS satellite.
  • the acquisition number storage unit stores acquisition upper limit numbers Ml and M2 in association with the determination result of the second GPS positioning stop condition.
  • the upper limit number M2 of captures is equal to or greater than the upper limit number Ml of captures.
  • the GPS positioning cancellation determination unit 7 determines whether GPS positioning is satisfied when all of the first, second, and third cancellation conditions are satisfied, or when all of the first, second, and fourth cancellation conditions are satisfied. It is determined that the positioning stop condition is satisfied, and a value indicating GPS positioning stop is set in the GPS positioning stop flag memory (not shown). On the other hand, if any one of the first, second, third and fourth stop conditions is not satisfied, it is determined that the GPS positioning stop condition is not satisfied, and the GPS positioning stop flag memory (not shown) is stored. Set a value indicating the continuation of GPS positioning. In addition, the GPS positioning stop determination unit 7 determines that the GPS positioning stop condition is satisfied when one of the above cancellation conditions is satisfied, and the GPS positioning is stopped in the GPS positioning stop flag memory (not shown). A value indicating continuation may be set.
  • the GPS positioning stop determination unit 7 may determine that the GPS positioning stop condition is satisfied as follows.
  • the GPS positioning stop determination unit 7 uses the reception level of the positioning signal received by the GPS receiving unit 3 for GPS positioning when the GPS satellite capturing unit 5 captures a GPS satellite. However, it may be determined that the GPS positioning stop condition is satisfied based on the reception level of positioning signals related to GPS satellites! That is, the GPS positioning stop determination unit 7 determines whether or not the GPS positioning stop condition is satisfied by using a GPS satellite that can receive a positioning signal even though it is not measured by the captured number measuring unit 6.
  • the GPS positioning stop determination unit 7 measures the CN value (Carrier to Noise ratio) of the positioning signals received from those GPS satellites at each reception, and the CN value is determined from the past. (For example, when comparing the t-1 time point with the t time point! /, Increase)! /, N! /, If it is determined that the GPS positioning stop condition (5th stop condition) is satisfied . If the CN value has not increased, it is unlikely that new GPS satellites can be captured over time. On the other hand, if the CN value increases, there is a high possibility that a new GPS satellite can be captured, so it is meaningful to continue GPS positioning. Note that the CN value is not necessarily used as information indicating the reception level.
  • An SN value (Signal to Noise ratio), received power, etc. may be used.
  • the CN value measured for the above judgment is stored in the visible satellite information storage unit 13 etc. and is referred to at the time of judgment. That is, the GPS positioning stop determination unit 7 determines whether or not the GPS positioning stop condition is satisfied by using a GPS satellite that can receive the positioning signal even though it is not measured by the captured number measuring unit 6.
  • the received signal level of the positioning signal exceeds the level that can be used for SGPS positioning! /, N! /, Based on the received level of the positioning signal related to the GPS satellite! /,
  • the GPS positioning stop condition is it possible to obtain GPS positioning results in a short time when there is a GPS satellite that is capable of receiving only positioning signals with a low reception level?
  • the accuracy of determining whether or not can be improved. That is, it is possible to prevent the positioning from being stopped when GPS positioning can be possible, and to determine more accurately whether or not the GPS positioning should be stopped.
  • the GPS positioning stop determination unit 7 uses the reception level of the positioning signal received by the GPS receiving unit 3 for GPS positioning when the GPS satellite capturing unit 5 captures the GPS satellite.
  • GPS positioning stop condition based on whether or not information indicating the time has been obtained from the positioning signal from the GPS satellite that exceeds the possible positioning level (whether the time information indicating the time has been decoded from the positioning signal) You may determine with satisfy
  • the GPS positioning cancellation determination unit 7 determines whether time information has been acquired (decoded) from the positioning signals received from those GPS satellites. It is determined that the stop condition (sixth stop condition) is satisfied. This is because if the time information cannot be obtained from the positioning signals from the GPS satellites, many positioning signals from the GPS satellites are required for the positioning calculation. On the other hand, if the time information can be acquired from the positioning signals from the GPS satellites, there are fewer positioning signals from the GPS satellites used for positioning calculations, so it is meaningful to continue GPS positioning. In this way, by determining whether the time information can be acquired from the positioning signal, it is possible to prevent the positioning from being stopped when GPS positioning can be possible, and more accurately determine whether the GPS positioning should be stopped. I can judge.
  • the GPS positioning stop determination unit 7 may determine that the GPS positioning stop condition is satisfied from the position information of the visible satellite with reference to the visible satellite position information storage unit 13a as follows. That is, the GPS positioning stop determination unit 7 determines a predetermined range from the assumed terminal position P in the zenith direction. The reception level of positioning signals from visible satellites located within the surroundings (for example, the range where the elevation angle is 60 ° or more, the range within the circle where the elevation angle is 60 ° in Fig. 4) and the reception level of positioning signals from other visible satellites The difference between the two is calculated, and whether or not the GPS positioning stop condition is satisfied is determined based on the difference value.
  • the value of the difference is calculated, for example, by subtracting the reception level of positioning signals from other visible satellites from the reception level of positioning signals from visible satellites located in a predetermined range in the zenith direction.
  • the GPS positioning stop determination unit 7 determines whether or not the difference value is equal to or less than a predetermined value set in advance, and determines that the GPS positioning stop condition ( (Seventh cancellation condition) is determined to be satisfied. Even if there are no visible satellites in the predetermined range in the zenith direction, it is determined that the GPS positioning stop condition (seventh stop condition) is satisfied. In addition, if there are multiple visible satellites in the zenith range and other visible satellites, select the strongest! / Of the visible satellites at the reception level, etc. decide. You can also compare the average straightness of each area (zenith direction and others)! /.
  • the mobile communication terminal 1 If the reception level of the positioning signal from the visible satellite in the zenith direction is weak, or if there is no visible satellite in the zenith direction, the mobile communication terminal 1 is likely to have captured the visible satellite through a window or the like. There is a high possibility that it is located inside a building with a roof. When the mobile communication terminal 1 is in such a position, it is unlikely that a positioning result can be obtained in a short time even if GPS positioning is continued.
  • the GPS positioning stop determination unit 7 determines that the GPS positioning stop condition is satisfied if all of the first to seventh stop conditions (any of the third and fourth stop conditions) are satisfied. Set a value indicating that GPS positioning is stopped in the stop flag memory (not shown). On the other hand, if any one of the 1st to 7th cancellation conditions is satisfied, or if one of them is not satisfied! /, The GPS positioning cancellation condition is determined not to be satisfied! /, And the GPS positioning cancellation flag memory (not shown) Set a value indicating the GPS positioning continuation. As a modification, the GPS positioning stop determination unit 7 satisfies any one of the above stop conditions. If it is determined that the GPS positioning stop condition is met, do not set the GPS positioning stop flag memory (not shown) to indicate that GPS positioning is continued! /.
  • the GPS positioning stop determination unit 7 determines that the GPS positioning is uniformly performed when the waiting time ( ⁇ , ⁇ , T) according to the number of satellites from which Sv (t) IDs have been extracted has elapsed. Positioning stop condition is met
  • GPS positioning may be possible, so it is better to continue GPS positioning! /.
  • the GPS positioning stop determination unit 7 determines the positioning status of the GPS positioning by the GPS positioning unit 4, the capturing status of the GPS satellites by the GPS satellite capturing unit 5, and the number of GPS satellites captured by the capturing number measuring unit 6. If it is determined that GPS positioning is to be continued based on at least one of the measurement results, and if it is determined to continue GPS positioning, it is determined that the standby time has elapsed. Is determined not to satisfy the GPS positioning stop condition. In the present embodiment, determining whether to continue GPS positioning is referred to as stoppage determination.
  • the GPS positioning stop determination unit 7 has a force S at which the visible satellite is zero, and a positioning signal whose reception level of the positioning signal received from the GPS satellite by the GPS receiving unit 3 can be used for GPS positioning. If the GPS satellite capture unit 5 detects GPS satellites (however, the frequency is exceeded), GPS positioning will be continued. GPS satellites that receive positioning signals as described above can become visible satellites over time, and as a result, GPS positioning may be possible, so it is preferable to continue GPS positioning. . If a positioning signal at a level that can capture the frequency is received for a certain period of time (for example, several seconds such as 6 seconds, this time is predetermined) but is not a visible satellite, it becomes a visible satellite. Since the possibility is low, it is better not to continue GPS positioning after a certain period of time (for example, several seconds such as 6 seconds, which is predetermined). In addition, when there are multiple GPS satellites, it is good to continue GPS positioning.
  • a positioning signal at a level that can capture the frequency is received for a certain period of
  • the GPS positioning stop determination unit 7 performs GPS positioning when the number of GPS satellites acquired by the acquisition number measurement unit 6 is equal to or greater than a predetermined number (for example, two or more). Continue It is also good to do. Specifically, for example, the GPS positioning stop determination unit 7 determines that the elapsed time t from the positioning start time is the positioning timeout value T (the time for forcibly terminating GPS positioning).
  • Mout value, waiting time (values larger than ⁇ , ⁇ , T are set) (for example, time
  • GPS positioning is continued when the difference between the out value and the elapsed time is less than or equal to a preset threshold value) and the visible satellites are 2 or more and the positioning signal power of the visible satellites and time information can be acquired. It is also possible to make it. Time information can be acquired when the reception level is strong. This is because if the time information is acquired, the positioning signal from the GPS satellite used for the positioning calculation can be reduced, and GPS positioning is easy! /.
  • the GPS positioning stop determination unit 7 calculates the accuracy of the number of captured GPS satellites based on the change over time of the number of captured GPS satellites measured by the number-of-capture measurement unit 6, and obtains the accuracy. It is also desirable to determine whether or not to continue GPS positioning! /.
  • the accuracy of the number of captures indicates the degree to which the number of captures does not change over time. The method for calculating the accuracy of the number of captures will be described later.
  • the GPS positioning cancellation determination unit 7 has two or more visible satellites, and the accuracy of the calculated number of satellites is less than or equal to a preset value (the number of captured satellites is likely to increase) and starts positioning. Is the elapsed time from the positioning timeout value T?
  • GPS positioning may be continued when there is a preset time (for example, 2 seconds) from 0. This is because the GPS positioning is easy.
  • the GPS positioning control unit 8 refers to the GPS positioning stop flag memory, and when the value indicating the GPS positioning stop is set, cancels the arithmetic processing for GPS positioning performed in the GPS positioning unit 4 Then, the positioning method is switched to the base station using positioning method, and the base station using positioning unit 19 is caused to execute calculation processing for positioning. On the other hand, when a value indicating GPS positioning continuation is set in the GPS positioning stop flag memory, calculation processing for GPS positioning performed in the GPS positioning unit 4 is continuously performed.
  • Display unit 11 outputs a positioning result obtained by a calculation process in GPS positioning unit 4 or base station using positioning unit 19 together with a predetermined map image.
  • the standby time storage unit 12 stores standby times Tl, T2, and T3 in association with values set in the captured number flag memory.
  • the visible satellite information storage unit 13 includes a visible satellite position information storage unit (captured satellite position information storage). Means) 13a and a visible satellite history storage unit (change history storage means) 13b.
  • the visible satellite position information storage unit 13a stores the Sv (t) ID of the visible satellite captured by the GPS satellite capturing unit 5, the orbit information, the time information when the positioning signal is issued, and the position information in association with each other.
  • the visible satellite history storage unit 13b stores the Sv (t) ID of the visible satellite repeatedly captured by the GPS satellite capturing unit 5 in association with the capture time.
  • the GPS satellite orbit information storage unit 14 stores GPS satellite orbit information in association with the GPS satellite Sv (t) ID. The orbit information is based on data transmitted from the base station 100, It is updated at a predetermined timing.
  • the GPS positioning control unit 8 determines that the GPS positioning stop condition is satisfied by the GPS positioning stop determination unit 7, and the positioning method is changed to the base station-based positioning.
  • the base station positioning unit 19 performed calculation processing for positioning.
  • positioning using the base station-based positioning method is not necessarily performed by the mobile communication terminal 1 based on the signals transmitted and received between the mobile communication terminal 1 (the communication unit 2) and the base station. It may be performed by a positioning server that performs positioning of terminal 1. In that case, the GPS positioning control unit 8 requests the positioning server to perform positioning of its own terminal (transmits a request signal).
  • positioning server 200 includes reception unit 201, positioning unit 202, and transmission unit 203.
  • the receiving unit 201 is a receiving unit that receives a request signal that is a request for positioning of the mobile communication terminal 1 from the mobile communication terminal 1.
  • the positioning unit 202 obtains transmission delay information of signals transmitted and received between the base station and the mobile communication terminal 1 related to the request signal from one or more base stations.
  • the positioning means performs positioning of the mobile communication terminal 1 by calculating the position of the mobile communication terminal 1 by acquiring and performing positioning calculation from the information. For the positioning calculation, information on the sector in which the mobile communication terminal 1 is transmitted, which is transmitted from the base station, may be used. In addition, positioning calculation combining base station positioning and GPS positioning may be performed.
  • the information related to GPS positioning acquired by the mobile communication terminal 10 is transmitted from the mobile communication terminal 10 to the positioning server 200 together with the request signal, for example.
  • Transmitting section 203 transmits information indicating the calculated position of mobile communication terminal 1 (positioning result information) to mobile communication terminal 1 related to the request signal. It is a means of communication.
  • the mobile communication terminal 1 receives positioning result information from the positioning server 200.
  • Mobile communication terminal 1 and positioning server 200 constitute a positioning calculation system.
  • the positioning server 200 is connected to a mobile communication network including a base station that transmits and receives signals to and from the mobile communication terminal 1, and is configured as a computer including a CPU and a memory, for example.
  • FIG. 3 is a diagram showing a GPS positioning procedure in the mobile communication terminal 1, and the step is abbreviated as “S”.
  • the GPS positioning is started by a user operation or the like as a trigger.
  • the time parameter (t) (sec) indicating the positioning time from the start of positioning
  • the acquisition count parameter (m) indicating the number of acquisitions are stored in the mobile communication terminal 1! / Zeroed out.
  • the positioning signal is received by the GPS receiving unit 3 and input from the GPS receiving unit 3 to the GPS satellite capturing unit 5 and the captured number measuring unit 6. Subsequently, the satellite acquisition step is executed by the GPS satellite acquisition unit 5, and the acquisition number measurement step is executed by the acquisition number measurement unit 6 based on the result of the satellite acquisition step (S23).
  • the GPS satellite capturing unit 5 extracts Sv (t) ID from the input positioning signal, captures the GPS satellite based on the Sv (t) ID, and identifies it as a visible satellite. Furthermore, the time and orbit data at which the positioning signal was issued are extracted from the positioning signal, and the GPS satellite position information at the time when the positioning signal was issued is obtained.
  • the GPS satellite acquisition unit 5 associates this position information with the Sv (t) ID as a visible satellite, stores the position information of the visible satellite in the visible satellite position information storage unit 13a, and stores the acquired Sv (t) ID. Acquisition frequency parameter
  • the visible satellite history storage unit 13b stores the data in association with the value of the meter (m).
  • the GPS satellite capturing unit 5 generates the first sky plot SP1 (see FIG. 4) based on the position information of the visible satellite and the assumed terminal position P! /. Further, the GPS satellite capturing unit 5 reads the GPS satellite orbit information stored in the GPS satellite orbit information storage unit 14, and based on the acquired orbit information of each GPS satellite and the assumed terminal position P, the second sky plot. Generate SP2 (see Figure 6).
  • the acquisition number measurement unit 6 determines the number of Sv (t) IDs stored in the visible satellite position information storage unit 13a as the number of Sv (t) (the number of acquisitions). And a value indicating the Sv (t) number is set in a capture number flag memory (not shown).
  • Sv (t) number S is “0”
  • a value indicating “1” is set in the captured number flag memory
  • the captured number flag is A value indicating “2” is set in the memory
  • Sv (t) power S is “2” or more
  • a value indicating “3” is set in the captured number flag memory.
  • the GPS satellite capturing unit 5 acquires time information from a positioning signal from which time information can be acquired.
  • a positioning signal whose signal strength is lower than the positioning possible level is input to the GPS positioning stop determination unit 7.
  • the GPS positioning stop determination unit 7 measures information (CN value, etc.) used for the determination described later from these positioning signals, and stores it in the visible satellite information storage unit 13 and the like and refers to it at the time of determination.
  • the GPS positioning unit 14 performs arithmetic processing for GPS positioning based on the various data stored in the visible satellite position information storage unit 13a and the arrival time difference between the positioning signals from the visible satellites.
  • the position information of the mobile communication terminal 1 is acquired as a positioning result (S24).
  • the GPS positioning unit 14 determines whether or not the GPS positioning result exceeds a predetermined error range (S25). When the GPS positioning result is determined to be within the predetermined error range, the GPS positioning result is determined to be appropriate, the positioning result is output to the display unit 11 (S 31), and the positioning is terminated after the predetermined reset process. To do.
  • the GPS positioning stop determination unit 7 calculates the accuracy of the number of captured GPS satellites from which positioning signals can be received (S26). GPS satellite The process of calculating (predicting) the accuracy of the number of captures will be described using the flowchart in FIG.
  • elapsed time t is determined as positioning time.
  • a regression analysis using the current number of visible satellites and the transition of the number of visible satellites in the past is performed, and a function of the number of visible satellites according to time is calculated.
  • prediction is performed (in Fig. 8, the solid line is the measured value and the broken line is the calculated function).
  • the accuracy is calculated using a function that outputs a function value that is smaller if it is smaller. Also, the higher the degree of progress, the greater the accuracy. Specifically, for example, a value corresponding to the degree of progress is added to the accuracy. The above is the process of calculating the accuracy of the number of GPS satellites captured.
  • the GPS positioning stop determination unit 7 determines whether or not to stop (S27 in FIG. 3). Processing for determining whether or not to stop can be described using the flowchart in FIG.
  • the position of the terminal 1 can be calculated by GPS positioning (S24) by the GPS positioning unit 4 (S271). If the GPS positioning unit 4 determines that the position of the terminal 1 can be calculated by GPS positioning, the GPS positioning is continued. Continue GPS positioning Information to that effect is stored in the memory of the mobile communication terminal 1 (the same applies hereinafter).
  • the reception level of the positioning signal received from the GPS satellite by the GPS receiver 3 is used for GPS positioning. It is determined whether the GPS satellite capture unit 5 detects that the force S, which is less than the possible positioning level, exceeds the level at which the frequency can be captured. Further, it is determined whether or not reception of the positioning signal continues for a certain time (for example, several seconds such as 6 seconds) (S272). As a result of the determination, if it is determined in the above determination that the reception has been performed for a certain time, the GPS positioning is not continued, and the information is stored in the memory of the mobile communication terminal 1.
  • GPS positioning is not supposed to be continued. In this case, it is continued! /, And the elapsed time from the positioning start time t is just before the positioning timeout value T, and the GPS satellite acquisition by the acquisition number measuring unit 6 is performed. Number
  • the predetermined number for example, two
  • time information can be acquired from the positioning signal of the visible satellite! / (S273).
  • the elapsed time t is just before the positioning timeout value T, the number of acquisitions is 2 or more, and the positioning signal of the visible satellite
  • the number of acquisitions of the GPS satellite by the acquisition number measurement unit 6 is not less than a predetermined number (for example, 2), The accuracy of the number of acquisitions is less than the specified value, and the elapsed time from the positioning start time is the positioning timeout value T force
  • the number of captures is greater than or equal to a preset number, the accuracy of the number of captures is less than or equal to a predetermined value, and the elapsed time t from the positioning start time is the positioning timeout value T force.
  • GPS positioning will be continued. In the process so far, it is said that GPS positioning cannot be continued, and in this case, GPS positioning is not continued.
  • the GPS positioning may be continued when a plurality of conditions are satisfied if any of the conditions for determining whether or not to stop can be satisfied. .
  • the above is the process for determining whether or not to stop.
  • the GPS positioning stop determination unit 7 Elapsed time t from the start of positioning passes GPS positioning stop time ⁇ , ⁇ , T according to the number of acquisitions
  • the GPS positioning stop determination unit 7 correlates with the value set in the capture number flag memory and stores the GPS positioning stop time T according to the capture number stored in the time storage unit 12. ,,, T information is read and the elapsed time from the start of GPS positioning is t
  • the stop condition is satisfied, it is determined that it is not. If it has passed, it is determined that the GPS positioning stop condition is not satisfied. If it is determined that the GPS positioning stop condition is satisfied, a value indicating GPS positioning stop is set in the GPS positioning stop flag memory (not shown), and it is determined that the GPS positioning stop condition is not satisfied. In this case, the GPS positioning stop flag memory (not shown) is set to a value indicating that GPS positioning is continued.
  • the GPS positioning control unit 8 executes a GPS positioning control step (S30).
  • the GPS positioning control unit 8 deletes the Sv (t) ID and position information of the visible satellites stored in the visible satellite position information storage unit 13a, and cancels the GPS positioning calculation processing by the GPS positioning unit 14 GPS positioning is canceled.
  • the base station using positioning unit 9 performs positioning.
  • the positioning result is output to the display unit 11 (S31), and positioning ends.
  • positioning using both GPS positioning and base station positioning may be performed.
  • the positioning of the terminal 1 may be requested from the GPS positioning control unit 8 to the positioning server.
  • positioning may be terminated without obtaining a positioning result by another positioning method such as a base station usage method.
  • the GPS positioning control unit 8 moves to the process of S21 to continue GPS positioning, The processes after S21 are repeated.
  • the stop determination unit 7 executes a GPS positioning stop determination step.
  • the GPS positioning stop determination unit 7 determines that the reception level of the positioning signal exceeds the positioning level that can be used for GPS positioning, that is, GPS satellites corresponding to Sv (t) ID. It is determined whether or not the positioning signal force can acquire the time signal (S35). If it is determined that the time signal can be acquired! /, “0” (times) is set in the acquisition number parameter (m) (S33), and the GPS positioning stop flag memory (not shown) is set. A value indicating continuation of GPS positioning is set. After that, the GPS positioning control unit 8 shifts to the process of S21 after a predetermined reset process in order to start a new GPS positioning.
  • the GPS positioning stop determination unit 7 determines in S35 that the time signal cannot be acquired from the positioning signal, the following GPS positioning stop determination step is executed.
  • the Sv (t) ID stored in the visible satellite history storage unit 13b is extracted by the GPS positioning stop determination unit 7.
  • the visible satellite history storage unit 13b stores the history of the Sv (t) ID extracted by the GPS satellite capturing unit 5 at 1-second intervals.
  • the GPS positioning stop determination unit 7 performs Sv ( t) It is determined whether or not the ID is the same as the Sv (t) ID related to the previous acquisition (t—1 time) (S32).
  • GPS positioning control unit 8 proceeds to the process of S21 after a predetermined reset process in order to start a new GPS positioning.
  • the GPS positioning stop determination unit 7 determines that they are the same in S32, the following GPS positioning stop determination step is executed.
  • the GPS positioning cancellation determination unit 7 causes the positioning signal reception level to exceed the level that can be used for GPS positioning! /, NA! /, GPS satellite, that is, Sv (t) ID Others It is determined whether the CN value of the GPS satellite has increased from the previous capture (t-1 time)!
  • the GPS positioning control unit 8 proceeds to the process of S21 after a predetermined reset process in order to start a new GPS positioning.
  • the GPS positioning stop determination unit 7 determines that the number has not increased in S34, the following GPS positioning stop determination step is executed.
  • a predetermined range in the zenith direction from the assumed terminal position P based on the position information of the plurality of GPS satellites stored in the visible satellite position information storage unit 13a by the GPS positioning stop determination unit 7 Calculate the difference between the reception level of positioning signals from visible satellites located at and the reception level of positioning signals from other visible satellites, and whether the difference is less than or equal to a preset value Is determined (S3 9). If the difference value is not less than or equal to a predetermined value, the process proceeds to S38 described later.
  • the GPS positioning stop determining unit 7 further determines the two visible satellites stored in the visible satellite position information storage unit 13a. It is determined from the position information whether the angle between Sv (t) IDs, that is, between the two visible satellites is less than or equal to a predetermined value ⁇ , and whether the elevation angle of each visible satellite is within the predetermined range. Whether or not is determined (S36). If the condition that the angle between the two visible satellites is less than or equal to the predetermined value ⁇ and the elevation angle of each visible satellite is within the predetermined range, the process proceeds to S37 described below, and if the condition is not met Proceed to S38 described below.
  • the GPS positioning stop determination unit 7 refers to a capture number storage unit (not shown) to extract the capture number upper limit value Ml, and the value of the capture number parameter (m) becomes the capture number upper limit value. It is determined whether or not Ml or less. If it is determined that the value of the acquisition count parameter (m) is less than or equal to the acquisition count upper limit Ml, it is determined that the GPS positioning stop condition is not satisfied, and the GPS positioning stop flag memory is set to continue GPS positioning. The value shown is set The If it is determined that the acquisition frequency parameter (m) exceeds the acquisition frequency upper limit Ml, a value indicating GPS positioning cancellation is set in the GPS positioning cancellation flag memory.
  • the GPS positioning stop determination unit 7 refers to the capture number storage unit (not shown) to extract the capture number upper limit M2, and the value of the capture number parameter (m) is set to the capture number upper limit. It is determined whether the value is less than M2. Then, if it is determined that the value of the acquisition frequency parameter (m) is less than or equal to the upper limit value M2 of the acquisition frequency, it is determined that the GPS positioning stop condition is not satisfied, and the GPS positioning stop flag memory indicates that GPS positioning is continued. The value is set. If it is determined that the acquisition count parameter (m) exceeds the acquisition count upper limit M2, a value indicating GPS positioning stop is set in the GPS positioning stop flag memory.
  • the determination of whether or not to continue GPS positioning and the branching of the processing according to the determination (S29) is that the value of the capture count parameter (m) is not greater than the capture count upper limit M2 in S37 or S38. If it is determined as! /, (Just before S30), it may also be done! /.
  • the process returns to S21 to stop the GPS positioning.
  • the GPS positioning is stopped, and the positioning method is switched from the GPS positioning to the base station using positioning (S30). Thereafter, the positioning result is output to the display unit 11 (S31), and positioning is terminated after a predetermined reset process.
  • the above is the operation in the GPS positioning of the mobile communication terminal 1 according to this modification.
  • GPS positioning can be continued without stopping the positioning when there is a possibility of positioning.
  • a specific determination method for determining whether or not to stop the above-described method can be used. As a result, it is possible to prevent GPS positioning from being stopped when GPS positioning can be possible, and to perform GPS positioning appropriately.
  • Fig. 5 is a graph showing the relationship between the location of the mobile communication terminal 1 and the standby time required for GPS positioning.
  • the vertical axis is the standby time required for GPS positioning
  • the horizontal axis is indoors and outdoors and the interior In the case of, the distance from the window is shown.
  • the standby time required for GPS positioning will increase as the distance from the window increases.
  • the mobile communication terminal 1 by canceling the GPS positioning based on the number of GPS satellites captured, for example, the mobile communication terminal 1 is about 10 m away from the window. By suspending GPS positioning in 20 seconds with a waiting time of 20 seconds or longer, the user of mobile communication terminal 1 does not have to wait for 20 seconds or longer for GPS positioning.
  • the GPS satellite capturing unit 5 determines that if the signal strength (level) of the positioning signal received by the GPS receiving unit 3 exceeds the positioning possible level that can be used for GPS positioning, GPS satellites are acquired based on positioning signals that exceed the positioning level. As a result, GPS satellites that could only receive low-level positioning signals with low signal strength are not counted as the number of acquisitions, so it is possible to determine whether or not accurate GPS positioning results can be obtained in a short time by GPS positioning. It can be improved. In addition, if GPS positioning can be possible, it can be prevented from being stopped and GPS positioning can be performed appropriately.
  • the GPS positioning stop determination unit 7 determines that the angle formed by the straight line connecting the position of the GPS satellite stored in the visible satellite position information storage unit 13a and the assumed terminal position P is a predetermined angle or more. Because it is determined that the GPS positioning stop condition is satisfied, it is possible to estimate whether the mobile communication terminal 1 is indoors, and whether the GPS positioning result can be obtained in a short time. The determination accuracy can be improved. In addition, if GPS positioning can be possible, it can be prevented from being stopped and GPS positioning can be performed appropriately.
  • GPS positioning stop condition In addition to the number of GPS satellites captured, when the GPS satellite captured by the GPS satellite capturing unit 5 and the previously captured GPS satellite are the same, by determining that the GPS positioning stop condition is satisfied, It is possible to estimate whether or not the number of GPS satellites that can be acquired in a short time is low, and it is possible to improve the accuracy of determining whether or not positioning results can be obtained in a short time by GPS positioning. In addition, if GPS positioning can be possible, it can be prevented from being stopped and GPS positioning can be performed appropriately.
  • the GPS positioning stop determination means is based on the number of captures! /, And the set standby time has elapsed. Depending on whether or not the GPS positioning stop condition is satisfied, it is possible to set the waiting time depending on the possibility of obtaining the positioning result by GPS positioning. By determining whether or not the condition is satisfied, the waiting time required for GPS positioning of the user of the mobile communication terminal 1 can be efficiently reduced.
  • the GPS positioning stop determination unit 7 refers to the GPS satellite orbit information stored in the GPS satellite information storage unit 14 to extract the position information of the invisible satellite, and the actually captured visible satellites. Based on the position information and the position information of the invisible satellite, it is possible to determine whether or not the GPS positioning stop condition is satisfied. For example, as shown in FIG. 6, the second sky plot SP2 using the GPS satellite orbit information stored in the GPS satellite information storage unit 14 and the base station position information based on the data transmitted from the base station 100 is used. And the actual captured satellite positions Gc and Gd are reflected in the coordinates on the second sky plot SP2. On the second sky plot SP2, orbit information OR;! ⁇ OR6 of the GPS satellites that should be captured is shown.
  • orbit information of invisible satellites eg, OR2, OR3, OR5, OR6, etc.
  • Impossible orbital information power of the visible satellite When the acquisition area of the invisible satellite at the current time is specified and the acquisition area is included in a predetermined range indicating the zenith direction (for example, the elevation angle is 60 ° or more and 90 ° or less) Is likely to be indoors, it is determined that the GPS positioning stop condition is satisfied, and it may not be included! /, In some cases, satisfied! /, NA! /! ,.
  • the latest GPS satellite Sv (t) ID stored in the visible satellite history storage unit 13b and the previous capture are acquired. It is determined whether the Sv (t) ID of the past GPS satellites related to the Sv (t) ID is the same, but the Sv (t ) Determine whether or not the Sv (t) ID of the latest GPS satellite is the same, and if it is the same, it is determined that the GPS positioning stop condition is satisfied, and the past number of times GPS related to capture If one of the satellite's Sv (t) IDs is not the same as the Sv (t) ID of the GPS satellite related to the latest acquisition, determine that the GPS positioning stop condition is not met. Good
  • the base station using positioning unit 9 combines the base station position information acquired from the data transmitted from the base station 100 and the arrival time difference between the positioning signals transmitted from the GPS satellites in the mobile communication terminal 1
  • the position information of the mobile communication terminal 1 is obtained as the positioning result from the distance information between the base station 100 and the mobile communication terminal 1 transmitted from a plurality of base stations 100. Also good.
  • the GPS positioning stop determining unit 7 may execute the GPS positioning stop determining step.
  • the GPS positioning stop determination unit 7 performs the same processing as in Step 7 or Step 8 above, and when it is determined that the GPS positioning stop condition is satisfied, the GPS positioning stop flag memory stores the GPS positioning stop flag memory.
  • a value indicating the continuation of GPS positioning may be set when it is not determined that the GPS positioning stop condition is satisfied.
  • the reception level is low! In the presence of, it is possible to improve the accuracy of determining whether GPS positioning results can be obtained in a short time. Also, if it is determined whether or not to continue GPS positioning based on whether or not time information can be acquired from the positioning signal, the accuracy of determining whether or not GPS positioning results can be obtained in a short time will be improved. It can be improved. In other words, if GPS positioning can be possible, it is possible to prevent the positioning from being stopped and to perform GPS positioning appropriately.
  • the positioning result of the mobile communication terminal can be obtained by requesting positioning from the positioning server.

Abstract

L'invention concerne un terminal de communication mobile dans lequel, lorsque le positionnement GPS est possible, l'interruption du positionnement est empêchée et le positionnement est effectué convenablement. Le terminal de communication mobile (1) possède une section de réception GPS (3) capable de recevoir un signal de positionnement provenant d'un satellite GPS et peut être localisé par positionnement GPS. Le terminal possède une section de réception de satellite GPS (5) pour capter un satellite GPS sur la base d'un signal de positionnement reçu, une section de comptage du nombre de réceptions (6) pour compter la nombre de satellites GPS captés, une section de détermination de l'interruption du positionnement GPS (7) pour déterminer, sur la base de conditions prédéterminées, si les conditions d'interruption du positionnement GPS sont satisfaites, et une section de contrôle du positionnement GPS (8) pour interrompre le positionnement GPS lorsque les conditions d'interruption du positionnement GPS sont déterminées comme étant satisfaites. La section de détermination de l'interruption du positionnement GPS (7) détermine, sur la base des conditions de positionnement GPS et d'autres conditions, si le positionnement GPS doit se poursuivre. Lorsque la continuation est déterminée, la section de détermination de l'interruption du positionnement GPS (7) détermine que les conditions d'interruption du positionnement GPS ne sont pas satisfaites.
PCT/JP2007/064765 2006-07-28 2007-07-27 Terminal de communication mobile et procédé de positionnement gps WO2008013263A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006206299 2006-07-28
JP2006-206299 2006-07-28
JP2007195281A JP4727628B2 (ja) 2007-07-27 2007-07-27 移動通信端末及びｇｐｓ測位方法
JP2007-195281 2007-07-27

Publications (1)

Publication Number Publication Date
WO2008013263A1 true WO2008013263A1 (fr) 2008-01-31

Family

ID=38981573

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/064765 WO2008013263A1 (fr) 2006-07-28 2007-07-27 Terminal de communication mobile et procédé de positionnement gps

Country Status (1)

Country Link
WO (1) WO2008013263A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014115092A (ja) * 2012-12-06 2014-06-26 Ntt Docomo Inc Ｇｐｓ測位システム、ｇｐｓ測位中継制御装置、ｇｐｓ測位方法、ｇｐｓ測位プログラム
JP2015059905A (ja) * 2013-09-20 2015-03-30 株式会社Ｎｔｔドコモ 携帯端末及び測位方式選択方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06148305A (ja) * 1992-11-11 1994-05-27 Matsushita Electric Ind Co Ltd Ｇｐｓ受信機
JPH078787U (ja) * 1993-07-14 1995-02-07 株式会社カンセイ 現在位置認識装置
JP2000249565A (ja) * 1998-12-31 2000-09-14 Casio Comput Co Ltd 測位装置及び受信装置
JP2002310692A (ja) * 2002-01-09 2002-10-23 Hitachi Ltd 位置測定を行う移動端末装置
JP2003078942A (ja) * 2001-08-30 2003-03-14 Denso Corp 無線通信端末、コンピュータプログラムおよび検索情報の送信方法
JP2003514215A (ja) * 1999-02-01 2003-04-15 スナップトラック・インコーポレーテッド 衛星測位システム（ｓｐｓ）信号の測定処理用の方法および装置
JP2006153695A (ja) * 2004-11-30 2006-06-15 Matsushita Electric Works Ltd 位置検出方法および装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06148305A (ja) * 1992-11-11 1994-05-27 Matsushita Electric Ind Co Ltd Ｇｐｓ受信機
JPH078787U (ja) * 1993-07-14 1995-02-07 株式会社カンセイ 現在位置認識装置
JP2000249565A (ja) * 1998-12-31 2000-09-14 Casio Comput Co Ltd 測位装置及び受信装置
JP2003514215A (ja) * 1999-02-01 2003-04-15 スナップトラック・インコーポレーテッド 衛星測位システム（ｓｐｓ）信号の測定処理用の方法および装置
JP2003078942A (ja) * 2001-08-30 2003-03-14 Denso Corp 無線通信端末、コンピュータプログラムおよび検索情報の送信方法
JP2002310692A (ja) * 2002-01-09 2002-10-23 Hitachi Ltd 位置測定を行う移動端末装置
JP2006153695A (ja) * 2004-11-30 2006-06-15 Matsushita Electric Works Ltd 位置検出方法および装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014115092A (ja) * 2012-12-06 2014-06-26 Ntt Docomo Inc Ｇｐｓ測位システム、ｇｐｓ測位中継制御装置、ｇｐｓ測位方法、ｇｐｓ測位プログラム
JP2015059905A (ja) * 2013-09-20 2015-03-30 株式会社Ｎｔｔドコモ 携帯端末及び測位方式選択方法

Similar Documents

Publication Publication Date Title
JP2008051808A (ja) 移動通信端末、ｇｐｓ測位方法、測位演算システム及び測位サーバ
KR101589419B1 (ko) 모바일 디바이스 포지셔닝을 위한 적응성 패시브 스캐닝 및/또는 액티브 프로빙 기술들
US10175364B2 (en) Systems and methods for estimating whether a receiver is inside or outside a building
US7663540B2 (en) Server device, mobile terminal and positioning mode selecting method
CN102193099B (zh) 定位终端和服务器
JP6165995B2 (ja) 独立して取得された気圧測定値に基づいたモバイルデバイス測位
US20140057652A1 (en) Access Point Measurements for Received Signal Prediction
JP2003207556A (ja) 端末位置情報システムにおける端末およびサーバ装置
KR101779966B1 (ko) 위치서비스 제공방법 및 이동 단말기
CN111741432B (zh) 室内定位方法及装置、终端、存储介质
US8378891B2 (en) Method and system for optimizing quality and integrity of location database elements
EP1903349A1 (fr) Terminal de communication mobile pour recevoir un service d'informations de position et procédé correspondant
EP2641416A1 (fr) Auto-positionnement d'une station sans fil
CN101120265A (zh) 用于在无线通信网络中定位移动终端的混合定位方法和系统
JP2009281927A (ja) 移動端末、並びにその屋内外判定方法及びプログラム
KR20110121179A (ko) 단말기에서 상대적인 위치를 추정하는 장치 및 방법
JP2003215228A (ja) 位置表示機能付き移動端末装置及び位置表示方法
CN113055949B (zh) 定位方法、装置、设备和介质
KR20080095042A (ko) 광대역 무선통신 시스템에서 사용자 입력을 통한 소형 기지국의 위치 설정 장치 및 방법
JP4755671B2 (ja) 移動通信端末、ｇｐｓ測位方法及び測位演算システム
KR20080060502A (ko) Ｇｐｓ 스위칭 중계기를 이용한 실내 측위시스템 및측위방법
CN109525931B (zh) 一种定位无线设备的方法、装置、设备及存储介质
JP4727628B2 (ja) 移動通信端末及びｇｐｓ測位方法
US20150133150A1 (en) Apparatus for determining indoor location and method for determining indoor location in multi-story building using the same
KR101631121B1 (ko) 모바일 컴퓨팅 장치의 위치 검출 방법 및 이를 수행하는 모바일 컴퓨팅 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07791459

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07791459

Country of ref document: EP

Kind code of ref document: A1