WO2017170005A1 - 屋内外判定プログラムが記録された記録媒体、屋内外判定システム、屋内外判定方法、移動端末、及び屋内外環境分類判定手段 - Google Patents
屋内外判定プログラムが記録された記録媒体、屋内外判定システム、屋内外判定方法、移動端末、及び屋内外環境分類判定手段 Download PDFInfo
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- WO2017170005A1 WO2017170005A1 PCT/JP2017/011313 JP2017011313W WO2017170005A1 WO 2017170005 A1 WO2017170005 A1 WO 2017170005A1 JP 2017011313 W JP2017011313 W JP 2017011313W WO 2017170005 A1 WO2017170005 A1 WO 2017170005A1
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- elevation angle
- standard deviation
- satellite
- indoor
- equal
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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
- 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
- G01S19/42—Determining position
- G01S19/45—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
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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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/28—Satellite selection
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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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
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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
- 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
- G01S19/42—Determining position
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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
- 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
- G01S19/42—Determining position
- G01S19/421—Determining position by combining or switching between position solutions or signals derived from different satellite radio beacon positioning systems; by combining or switching between position solutions or signals derived from different modes of operation in a single system
- G01S19/425—Determining position by combining or switching between position solutions or signals derived from different satellite radio beacon positioning systems; by combining or switching between position solutions or signals derived from different modes of operation in a single system by combining or switching between signals derived from different satellite radio beacon positioning systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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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
- G01S5/01—Determining conditions which influence positioning, e.g. radio environment, state of motion or energy consumption
- G01S5/014—Identifying transitions between environments
- G01S5/015—Identifying transitions between environments between indoor and outdoor environments
Definitions
- the present invention relates to an indoor / outdoor determination program for determining whether a mobile terminal is indoor or outdoor, an indoor / outdoor determination system, an indoor / outdoor determination method, a mobile terminal, and an indoor / outdoor environment classification determination unit.
- Some mobile terminals such as mobile terminals having a GPS (Global Positioning System) function have an indoor / outdoor determination function for determining whether the position of the mobile terminal is indoor or outdoor.
- the indoor / outdoor determination function uses the property that the received signal strength of GPS in an indoor environment is weakened, the property that the waveform of the signal strength from GPS is characterized, and the like.
- the information based on the received signal strength such as the received SNR (Signal to Noise Ratio) and the signal waveform is the main judgment basis.
- SNR Signal to Noise Ratio
- Patent Document 1 discloses a technique for determining whether indoor or outdoor depending on whether or not a GPS signal is received.
- Patent Document 2 discloses a technique for determining indoor or outdoor from the reception sensitivity of a signal from a positioning satellite, the number of captured satellites, and the change state thereof.
- Patent Document 3 it is determined whether indoor or outdoor depending on whether or not the average signal strength of the satellite signals from a plurality of positioning satellites is within the indoor compatible signal strength range and / or the outdoor compatible signal strength range. Techniques to do this are disclosed.
- Patent Document 3 discloses a technique for determining whether the signal intensity of a satellite signal from a positioning satellite within a high elevation angle range is indoor or outdoor depending on whether the signal intensity is within an expected intensity range.
- Patent Document 4 discloses a technique for determining indoor or outdoor using representative values and dispersion condition values of signals from a plurality of positioning satellites.
- Patent Document 5 discloses a technique for determining whether indoor or outdoor using the reception quality of GPS radio waves or the time required to acquire GPS position information.
- Patent Document 6 discloses environmental data (a signal-to-noise ratio, a signal-to-interference wave ratio, an input signal strength, a signal attenuation, a correlation function waveform, a peak width value) representing a mode of propagation locally at the receiver location.
- environmental data a signal-to-noise ratio, a signal-to-interference wave ratio, an input signal strength, a signal attenuation, a correlation function waveform, a peak width value
- the indoor / outdoor determination function described in Patent Documents 1 to 6 is applied to a satellite positioning system having a very large number of satellites, the received signal from the satellite in the indoor environment is not easily weakened. Setting a threshold value becomes difficult.
- the number of satellites in the positioning system is increasing step by step against the background of the leveling of annual investment in the positioning system and the demand for higher positioning accuracy. Therefore, the received signal strength of GPS received in the indoor environment increases stepwise, and the indoor / outdoor determination threshold needs to be changed stepwise.
- the indoor / outdoor determination function described in Patent Documents 1 to 6 requires derivation and setting of an appropriate determination threshold whenever the number of satellites increases, and determination accuracy decreases unless the determination threshold is changed as needed. there is a possibility.
- the main problems of the present invention are an indoor / outdoor determination program, an indoor / outdoor determination system, an indoor / outdoor determination method, a mobile terminal, which can determine indoors and outdoors with higher accuracy than a determination method based on satellite reception intensity that makes threshold setting difficult. And providing an indoor / outdoor environment classification determination unit.
- An indoor / outdoor determination program is an indoor / outdoor determination program that executes an operation of determining whether a mobile terminal is indoors or outdoors using hardware resources, and includes satellite reception provided in the mobile terminal.
- An indoor / outdoor determination system receives a satellite signal and calculates at least one of satellite elevation angle information and satellite azimuth angle information using orbit information of the satellite included in the satellite signal. And an indoor / outdoor environment classification determination unit that determines whether the presence of the mobile terminal is indoor or outdoor based on at least one of the satellite elevation angle information and the satellite azimuth information acquired from the satellite receiver.
- a data server that is communicably connected to the terminal and the mobile terminal via a network, stores data from the mobile terminal, and data necessary for creating indoor / outdoor environment classification data for the data server. Request, plot the data obtained from the data server on the map to create indoor / outdoor environmental classification data, and create the indoor / outdoor environmental classification data Comprising the indoor and outdoor environment classification visualization unit for displaying a distribution, the.
- An indoor / outdoor determination system receives a satellite signal and calculates at least one of satellite elevation angle information and satellite azimuth angle information using satellite orbit information included in the satellite signal.
- a data server that is communicably connected to the mobile terminal via a network and that stores data including at least one of the satellite elevation angle information and the satellite azimuth angle information from the mobile terminal;
- An indoor / outdoor environment classification determination unit that determines whether the mobile terminal is indoor or outdoor based on at least one of satellite elevation angle information and satellite azimuth information acquired from the data server; and data acquired from the data server And plotting on the map based on the determination result acquired from the indoor / outdoor environment classification determination unit to create indoor / outdoor environment classification data
- Comprising the indoor and outdoor environment classification visualization unit for displaying the indoor-outdoor environment classification data created as geographical distribution, the.
- the indoor / outdoor determination method is an indoor / outdoor determination method for determining whether a mobile terminal is indoors or outdoors using hardware resources, and directly from a satellite receiver provided in the mobile terminal.
- the method includes a step of determining whether the presence of the mobile terminal is indoor or outdoor based on at least one of satellite elevation angle information and satellite azimuth information acquired indirectly.
- a mobile terminal receives a satellite signal and calculates at least one of satellite elevation angle information and satellite azimuth information using satellite orbit information included in the satellite signal;
- An indoor / outdoor environment classification determination unit that determines whether the presence of the mobile terminal is indoor or outdoor based on at least one of the satellite elevation angle information and the satellite azimuth angle information acquired from the satellite receiver.
- the indoor / outdoor environment classification determination unit is based on at least one of satellite elevation angle information and satellite azimuth angle information acquired directly or indirectly from a satellite receiver provided in the mobile terminal. To determine if the presence of the is indoor or outdoor.
- indoors and outdoors can be determined with higher accuracy than a determination method based on satellite reception intensity, which makes it difficult to set a threshold value.
- FIG. 5 is a flowchart schematically illustrating a first operation of an indoor / outdoor environment classification determination unit of a mobile terminal in the indoor / outdoor determination system according to the first embodiment.
- 6 is a flowchart schematically showing a second operation of an indoor / outdoor environment classification determination unit of a mobile terminal in the indoor / outdoor determination system according to Embodiment 1.
- FIG. 10 is a flowchart schematically showing a third operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the first embodiment.
- FIG. 6 is a flowchart schematically showing a first operation of an indoor / outdoor environment classification determination unit of a mobile terminal in an indoor / outdoor determination system according to Embodiment 2.
- FIG. 6 It is the flowchart figure which showed typically the 2nd operation
- FIG. 6 is a flowchart schematically showing a first operation of an indoor / outdoor environment classification determination unit of a mobile terminal in an indoor / outdoor determination system according to Embodiment 2.
- FIG. It is the flowchart figure which showed typically the 2nd operation
- FIG. 1 It is the flowchart figure which showed typically the 3rd operation
- FIG. 2 It is the flowchart figure which showed typically the 4th operation
- FIG. 2 It is the flowchart figure which showed typically the 5th operation
- FIG. 10 is a sky plot diagram of GPS satellites for explaining the 3D azimuth area calculated by the fifth operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment. It is the flowchart figure which showed typically the 6th operation
- FIG. FIG. 10 is a sky plot diagram of GPS satellites for explaining the degree of bias toward a low elevation angle and a specific direction calculated by the sixth operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment. .
- FIG. 10 is a flowchart schematically showing the operation of a mobile terminal in the indoor / outdoor determination system according to the third embodiment. It is the block diagram which showed typically the structure of the indoor / outdoor determination system which concerns on Embodiment 4.
- FIG. 10 is a flowchart schematically showing the operation of a mobile terminal in the indoor / outdoor determination system according to the fourth embodiment. It is the block diagram which showed typically the structure of the indoor / outdoor determination system which concerns on Embodiment 5.
- FIG. It is the block diagram which showed typically the structure of the indoor / outdoor determination system which concerns on Embodiment 6.
- FIG. It is the flowchart figure which showed typically the operation
- FIG. 1 is a block diagram schematically illustrating the configuration of the indoor / outdoor determination system according to the first embodiment.
- the indoor environment includes a window in many cases, and the direction in which the GPS satellite radio wave is received tends to be biased toward the window. Whether indoor or outdoor is determined based on information including satellite elevation angle information corresponding to the direction in which the satellite exists (in some cases, it is determined whether the window is indoors or non-windowed).
- the indoor environment is a building made of artifacts. Since the indoor environment is a place where people enter, it is hardly sealed completely. That is, indoor environments have windows for daylighting and vents for ventilation in most cases. Glass is generally used for the window, and it is easier for radio waves from GPS satellites to pass through than windows such as concrete.
- the vent is a part of a path connecting the indoor and the outdoor, and has a property of allowing radio waves to pass more easily than a wall surface.
- the first embodiment uses the feature to determine whether it is indoor or outdoor. Specifically, the basis for determination is the bias of the elevation angle of a satellite that is transmitting radio waves that can be received in an indoor environment. Therefore, the indoor and outdoor environments are determined with high accuracy.
- the indoor / outdoor determination system 100 is a system for determining whether the mobile terminal 1 is indoors or outdoors.
- the indoor / outdoor determination system 100 includes a mobile terminal 1, a network 6, a data server 7, and an indoor / outdoor environment classification visualization unit 8.
- the mobile terminal 1 is a portable information communication terminal.
- the mobile terminal 1 includes a GPS antenna 2, a GPS receiver 3, an indoor / outdoor environment classification determination unit 4, and a data transmission unit 5.
- the GPS antenna 2 is a satellite antenna that converts radio waves from GPS satellites into GPS signals.
- the GPS antenna 2 outputs a GPS signal toward the GPS receiver 3.
- the GPS receiver 3 is a device that receives a GPS signal (satellite signal) from the GPS antenna 2.
- the GPS receiver 3 has a function of performing positioning based on the received GPS signal and calculating position information indicating a position where the mobile terminal 1 is present.
- the GPS receiver 3 has a function of calculating satellite elevation angle information using orbit information of GPS satellites (orbit information included in the GPS signal).
- the satellite elevation angle information includes satellite elevation angle information (high elevation angle) indicating the elevation angle of each satellite at a high elevation angle (45 ° to 90 °) and elevation angle of each satellite at a low elevation angle (0 ° to less than 45 °). And satellite elevation angle information (low elevation angle).
- the GPS receiver 3 outputs the calculated position information, satellite elevation angle information (high elevation angle), and satellite elevation angle information (low elevation angle) to the indoor / outdoor environment classification determination unit 4 and the data transmission unit 5, respectively.
- the GPS antenna 2 and the GPS receiver 3 are not limited to those applicable to the GPS (Global Positioning System) currently operated by the United States, but are all satellites such as GLONASS (Global Navigation Satellite System) operated by the Russian Federation. Applicable in positioning system.
- the GPS antenna 2 and the GPS receiver 3 can also be applied to a positioning system in which a plurality of different satellite positioning systems are combined.
- the indoor / outdoor environment classification determination unit 4 is a functional unit that determines the indoor / outdoor environment classification based on position information from the GPS receiver 3, satellite elevation angle information (high elevation angle), and satellite elevation angle information (low elevation angle).
- the indoor / outdoor environment classification determination unit 4 functions using hardware resources, and may be realized by executing software in a computer, or may be realized by an integrated circuit.
- the indoor / outdoor environment classification determination unit 4 outputs determination information related to the determined indoor / outdoor environment classification to the data transmission unit 5. Details of the operation of the indoor / outdoor environment classification determination unit 4 will be described later.
- the data transmission unit 5 is a functional unit capable of transmitting predetermined data to the data server 7 via the network 6.
- the data transmission unit 5 may transmit data including position information from the GPS receiver 3, satellite elevation angle information (high elevation angle) and satellite elevation angle information (low elevation angle), and determination information from the indoor / outdoor environment classification determination unit 4. it can.
- the network 6 is a communication network that connects the mobile terminal 1 and the data server 7 in a communicable manner. Since the mobile terminal 1 is a mobile terminal, the mobile terminal 1 is LTE (Long Term Term Evolution), W-CDMA (Wideband Code Division Multiple Access), public wireless LAN (Local Area Network), Bluetooth ( Registered trademark), a non-contact communication system, and the like. Further, the network 6 is not necessarily limited to a wireless network, and may include a network connected by wire.
- the data server 7 is a server that accumulates data from the mobile terminal 1.
- the data server 7 has a function of receiving data transmitted from the mobile terminal 1 via the network 6 and storing the received data.
- the data server 7 has a function of transmitting a part of the accumulated data to the indoor / outdoor environment classification visualization unit 8 in response to a request from the indoor / outdoor environment classification visualization unit 8.
- the indoor / outdoor environment classification visualization unit 8 is a functional unit that makes the indoor / outdoor environment classification data visible to the naked eye.
- the indoor / outdoor environment classification visualization unit 8 requests the data server 7 for data necessary for creating indoor / outdoor environment classification data, plots the data acquired from the data server 7 on a map, and outputs the indoor / outdoor environment classification data. It has a function of creating and displaying the created indoor / outdoor environment classification data as a geographical distribution.
- the indoor / outdoor environment classification visualization unit 8 adds the network quality information of the network 6 of the mobile terminal 1 (for example, physical quality information such as uplink and downlink throughput and signal strength) in addition to the indoor / outdoor environment classification data. Is also shown as a geographical distribution, thereby having a function of visually displaying the relationship between the network quality information of the network 6 and the indoor / outdoor environment classification data.
- the GPS receiver 3 receives a GPS signal supplied from the GPS antenna 2. Next, the GPS receiver 3 performs positioning based on the received GPS signal. When performing positioning, the GPS receiver 3 calculates position information (latitude, longitude, altitude) where the mobile terminal 1 exists based on the received GPS signal, and uses the orbit information of the satellite included in the received GPS signal. Based on this, satellite elevation angle information (high elevation angle) and satellite elevation angle information (low elevation angle) are calculated. Next, the GPS receiver 3 converts the information including the calculated position information (latitude, longitude, altitude), satellite elevation angle information (high elevation angle), and satellite elevation angle information (low elevation angle) into the indoor / outdoor environment classification determination unit 4 and data. Output to the transmitter 5.
- position information latitude, longitude, altitude
- satellite elevation angle information high elevation angle
- satellite elevation angle information low elevation angle
- the indoor / outdoor environment classification determination unit 4 is based on information including position information (latitude, longitude, altitude), satellite elevation angle information (high elevation angle), and satellite elevation angle information (low elevation angle) from the GPS receiver 3.
- position information latitude, longitude, altitude
- satellite elevation angle information high elevation angle
- satellite elevation angle information low elevation angle
- the environmental classification of whether the position where the mobile terminal 1 exists is indoor or outdoor is determined based on a predetermined operation, and the determination information resulting therefrom is output to the data transmission unit 5.
- the predetermined operation will be described later.
- the data transmission unit 5 receives position information (latitude, longitude, altitude) from the GPS receiver 3, satellite elevation angle information (high elevation angle), satellite elevation angle information (low elevation angle), and indoor / outdoor environment classification determination unit 4. Is transmitted to the data server 7 via the network 6.
- the data server 7 receives the data from the data transmission unit 5 and accumulates the received data. As a result, the data server 7 becomes ready to receive a data request from the indoor / outdoor environment classification visualization unit 8.
- the indoor / outdoor environment classification visualization unit 8 requests the data server 7 for a part of the accumulated data.
- the data server 7 transmits a part of the accumulated data to the indoor / outdoor environment classification visualization unit 8 in response to a request from the indoor / outdoor environment classification visualization unit 8.
- the indoor / outdoor environment classification visualization unit 8 plots the data from the data server 7 on a map to create indoor / outdoor environment classification data, and displays the created indoor / outdoor environment classification data as a geographical distribution.
- the indoor / outdoor environment classification visualization unit 8 shows the network quality information of the network 6 and the network quality information by displaying the network quality information of the network 6 of the mobile terminal 1 in addition to the indoor / outdoor environment classification data. Visually display the relevance of internal / external environmental classification data.
- FIG. 2 is a flowchart schematically illustrating a first operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the first embodiment.
- the first operation is to determine whether indoor or outdoor based on the ratio of the number of satellites of low elevation angle and high elevation angle. Refer to FIG. 1 for the components of the mobile terminal.
- the indoor / outdoor environment classification determination unit 4 receives information including position information (latitude, longitude, altitude), satellite elevation angle information (high elevation angle), and satellite elevation angle information (low elevation angle) from the GPS receiver 3 (step A1). ).
- the indoor / outdoor environment classification determination unit 4 counts the number of low elevation satellites based on the position information (latitude, longitude, altitude) and the satellite elevation angle information (low elevation angle) (step A2).
- the indoor / outdoor environment classification determination unit 4 counts the number of high elevation satellites based on the position information (latitude, longitude, altitude) and satellite elevation angle information (high elevation angle) (step A3). Step A3 may be performed before or simultaneously with step A2.
- the indoor / outdoor environment classification determination unit 4 calculates the ratio of the number of satellites having a low elevation angle and a high elevation angle (step A4).
- the ratio of the number of satellites of low elevation angle and high elevation angle is calculated by dividing the number of satellites of low elevation angle by the number of satellites of high elevation angle.
- the value of the ratio of the number of satellites with a low elevation angle and a high elevation angle is set to infinity.
- the ratio of the number of satellites between the low elevation angle and the high elevation angle increases as the number of GPS satellites that transmit receivable radio waves is biased toward a low elevation angle.
- the indoor / outdoor environment classification determination unit 4 determines whether or not the calculated satellite number ratio of the low elevation angle and the high elevation angle is equal to or greater than a preset threshold TH R (satellite number ratio threshold) (step S1). A5).
- step A5 If the number of satellites ratio is the threshold value TH R more (YES in step A5), indoor and outdoor environmental classification judging unit 4, the position where the mobile terminal 1 exists determines that indoor (step A6), and ends.
- indoor and outdoor environmental classification judging unit 4 the position where the mobile terminal 1 exists determines that outdoor (step A7), and ends.
- FIG. 3 is a flowchart schematically illustrating a second operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the first embodiment.
- the second operation not only determines whether indoor or outdoor based on the ratio of the number of satellites of low and high elevation angles, but also determines whether the window is indoors or non-windows. Refer to FIG. 1 for the components of the mobile terminal.
- the indoor / outdoor environment classification determination unit 4 determines that the calculated satellite number ratio of the low elevation angle and the high elevation angle is a preset threshold TH R_L (first It is determined whether or not it is equal to or greater than (one satellite number ratio threshold) (step B5).
- the calculated satellite number ratio of low elevation angle and high elevation angle is greater than or equal to a preset threshold value TH R_H (second satellite number ratio threshold value).
- TH R_H TH R_L . This is based on the property that the ratio of the number of satellites having a low elevation angle and a high elevation angle is such that the number of GPS satellites that transmit receivable radio waves is biased toward a lower elevation as the window is not open.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 is present is indoor (non-window) (step B7), and ends. .
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoor (by the window) (step B8), and the process ends.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 is present is outdoor (step B9), and ends.
- FIG. 4 is a flowchart schematically showing a third operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the first embodiment.
- the third operation is to determine whether indoor or outdoor based on statistical values (average value, maximum value, standard deviation) of the elevation angle of the satellite. Refer to FIG. 1 for the components of the mobile terminal.
- the indoor / outdoor environment classification determination unit 4 is based on position information (latitude, longitude, altitude), satellite elevation angle information (high elevation angle), and satellite elevation angle information (low elevation angle). Then, the statistical values (average value, maximum value, standard deviation) of the elevation angles of all the satellites transmitting receivable radio waves are calculated (step C2).
- the indoor / outdoor environment classification determination unit 4 determines whether or not the calculated average value of elevation angles (elevation angle average value) is equal to or less than a preset threshold value TH EL — A (elevation angle average value threshold value) (step C3).
- the indoor / outdoor environment classification determination unit 4 determines that the calculated maximum elevation angle value (maximum elevation angle value) is a preset threshold value TH EL_M (elevation angle). It is determined whether it is equal to or less than the maximum threshold value (step C4).
- the indoor / outdoor environment classification determination unit 4 determines that the calculated standard deviation of elevation angle (elevation angle standard deviation) is a preset threshold value TH ⁇ EL (elevation angle). It is judged whether it is below the standard deviation threshold) (step C5). Note that the order of steps C3 to C5 may be changed.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 is present is indoors (step C6), and the process ends.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 is present is outdoor (step C7), and ends.
- FIG. 5 is a flowchart schematically showing a fourth operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the first embodiment.
- the fourth operation is to determine not only indoor or outdoor based on the statistical values (average value, maximum value, standard deviation) of the elevation angle of the satellite but also indoor or outdoor. Refer to FIG. 1 for the components of the mobile terminal.
- the indoor / outdoor environment classification determination unit 4 determines that the calculated standard deviation of the elevation angle is a preset threshold TH ⁇ EL_H (first elevation angle standard deviation threshold). It is determined whether the following is true (step D5).
- the indoor / outdoor environment classification determination unit 4 determines that the calculated standard deviation of the elevation angle is a preset threshold value TH ⁇ EL_L (second elevation angle standard deviation threshold value). ) It is determined whether the following is true (step D6).
- TH ⁇ EL_H > TH ⁇ EL_L This is based on the property that the standard deviation of the elevation angle becomes smaller as the window becomes smaller.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 is present is indoor (non-window) (step D7), and ends. To do.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 is present is indoor (by the window) (step D8), and ends.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is outdoor (step D9), and the process ends.
- the indoor / outdoor determination system as described above can be used in the field of grasping the geographical distribution of wireless quality in a wireless network.
- a wireless network firstly, there is a wireless network called a cellular system such as LTE, W-CDMA, GSM (global system for mobile communications; registered trademark) mainly used for commercial use.
- a second example of the wireless network is a wireless LAN network for short-range communication including non-commercial use.
- Thirdly, as a wireless network there is a wireless network that does not limit a wireless communication system for public use such as police and fire fighting or private use such as a private company.
- Embodiment 1 has the following effects.
- the first embodiment it is possible to determine whether indoors or outdoors with higher accuracy than in the prior art.
- the reason is that the conventional technology determines indoor and outdoor using the characteristic that the received signal strength of GPS received in an indoor environment is weak and the temporal waveform of the signal strength is characterized.
- the first embodiment has the property that the direction of the satellite transmitting radio waves that can be received in the building is biased to a low elevation angle.
- the physical statistic value expressed is used as an index, and the index is easy to express physically based on the opening angle of the window on the vertical plane with respect to the horizon, and the judgment threshold can be easily set, This is because highly accurate outdoor / indoor determination can be realized.
- the first embodiment when applied to a satellite positioning system having a very large number of satellites, it is possible to make it easier to set a threshold for determining whether indoors or outdoors than in the prior art.
- the reason for this is that when applied to a satellite positioning system with a very large number of satellites, it is difficult to set appropriate judgment thresholds indoors and outdoors because received signals from many satellites are difficult to weaken in an indoor environment.
- the first embodiment introduces an indicator of the deviation of the direction of the satellite transmitting the receivable radio wave, and the indicator is not affected by the large number of satellites. .
- the first embodiment since the index of the deviation of the direction of the satellite transmitting the receivable radio wave has a property that the reliability increases as the number of satellites increases, the first embodiment has the number of satellites.
- the index of the deviation of the direction of the satellite transmitting the receivable radio wave has a property that the reliability increases as the number of satellites increases.
- the positioning system when applied to a positioning system in which the number of satellites is increased in stages, it is possible to eliminate the stepwise change or setting of the determination threshold that is necessary in the prior art. .
- the prior art when applied to a positioning system that gradually increases the number of satellites, the received signal strength from satellites that transmit radio waves that can be received in an indoor environment increases stepwise. While it is necessary to change and set an appropriate indoor / outdoor judgment threshold step by step, it is difficult to derive and set an appropriate judgment threshold.
- the positioning system increases the number of satellites step by step. This is because the indicator of the bias value in the direction in which there are satellites transmitting radio waves that can be received through the window is not affected by the change in the number of satellites.
- the indicator of the bias value in the direction in which there are satellites transmitting receivable radio waves has a property of increasing reliability as the number of satellites increases.
- the types of indoor environment classification determinations of “indoor by window”, “indoor by window” and “indoor by window” can be increased. .
- the reason for this is that, in the first embodiment, the closer to the indoor window, the wider the bias in the direction in which the satellite that is transmitting the receivable radio wave exists, in addition to the indoor and outdoor determination thresholds. This is because it is possible to determine whether the window is indoors or non-windowed by providing an additional threshold for determining the window.
- the processing execution entity for indoor / outdoor determination in the mobile terminal 1 since data is transmitted after the determination, there is an advantage that data to be transmitted is reduced and the burden on the network is small. Have.
- wireless area design such as addition of a new base station and parameter adjustment of an existing base station is performed in order to improve the area quality of a cellular phone network which is a cellular system.
- a driving test was carried out with an electric vehicle equipped with a dedicated measuring instrument for the purpose of grasping the current state of wireless quality and finding problems.
- Such a driving test is a factor in increasing the cost of designing the wireless area because it is necessary to travel on the road in the area closely.
- the measurement locations are limited to roads where electric vehicles can pass, it is insufficient to grasp the quality indoors where the frequency of calls is high.
- a method of substituting for a driving test using a general terminal such as a mobile phone or a smartphone that is actually used by the user. Specifically, it causes a general terminal to measure the radio quality such as the received field strength of a cell and SINR (Signal-to-Interference-Noise-Ratio), and report the measurement result to the network management system together with location information.
- SINR Signal-to-Interference-Noise-Ratio
- the industry has high expectations for quality measurement technology using such general terminals, and is standardized as 3DTPP (3rd Generation Partnership Project) as MDT (Minimization of Drive Test).
- the radio quality of a macro base station installed outdoors is lower in the indoor than in the outdoor due to the transmission loss due to the building.
- indoor wireless quality problems are difficult to resolve by changing the parameters of an existing macro base station.
- an individual base station such as an indoor base station (Femto base station or Pico base station) is installed. Measures are implemented.
- you know where the wireless quality is bad by the indoor window you can make an appropriate decision to install a macro base station installed outdoors instead of an indoor base station. It was desired to grasp location information.
- FIG. 6 is a block diagram schematically illustrating the configuration of the indoor / outdoor determination system according to the second embodiment.
- the second embodiment is a modification of the first embodiment (see FIG. 1), and it is determined whether indoor or outdoor based on information including information (satellite azimuth angle information) related to an azimuth angle where a GPS satellite exists (indoor It is also possible to determine whether the window is near or not at the window).
- the GPS receiver 3 has a function of calculating satellite azimuth information using the satellite orbit information included in the GPS signal from the GPS antenna 2.
- the GPS receiver 3 outputs information including the calculated satellite azimuth information to the indoor / outdoor environment classification determination unit 4 and the data transmission unit 5.
- the indoor / outdoor environment classification determination unit 4 has a function of determining the indoor / outdoor environment classification based on information including satellite azimuth information.
- the data transmission unit 5 can transmit data including satellite azimuth information. Other configurations are the same as those in the first embodiment.
- the GPS receiver 3 outputs information including satellite azimuth information to the indoor / outdoor environment classification determination unit 4 and the data transmission unit 5.
- the indoor / outdoor environment classification determination unit 4 receives information including satellite azimuth information from the GPS receiver 3 and changes the environmental classification of the position where the mobile terminal 1 exists to a predetermined operation based on the received information. Based on the determination, the determination information obtained as a result is output to the data transmitter 5.
- the predetermined operation will be described later. Other operations are the same as those in the first embodiment.
- FIG. 7 is a flowchart schematically illustrating a first operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment.
- the first operation is not only to determine indoor or outdoor based on statistical values (average value, maximum value, standard deviation) of the elevation angle of the satellite, but also on the window side based on the azimuth width of the satellite. Or non-window side. Refer to FIG. 6 for the components of the mobile terminal.
- step E6 the indoor / outdoor environment classification determination unit 4 Is calculated (step E7).
- the indoor / outdoor environment classification determination unit 4 determines whether the calculated azimuth angle width is equal to or less than a preset threshold TH AZ_W (step E8).
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoor (non-window) (step E9), and ends. .
- the indoor / outdoor environment classification determination unit 4 It is determined that the existing position is indoor (by the window) (step E10), and the process ends.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is outdoor (step E11), and the process ends.
- FIG. 8 is a flowchart schematically illustrating a second operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment.
- the second operation is based on the standard deviation of the azimuth angle of the satellite as well as determining whether it is indoor or outdoor based on statistical values (average value, maximum value, standard deviation) of the elevation angle of the satellite and whether it is near the window or non-window. This determines whether the window is near the window or not.
- FIG. 6 for the components of the mobile terminal.
- step F6 the indoor / outdoor environment classification determination unit 4 Is calculated (step F7).
- the indoor / outdoor environment classification determination unit 4 determines whether the calculated standard deviation of the azimuth is equal to or less than a preset threshold TH ⁇ AZ (azimuth standard deviation threshold) (step F8).
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoor (non-window) (Step F9). finish.
- the indoor / outdoor environment classification determination unit 4 When the standard deviation of the elevation angle is not equal to or less than the threshold value TH ⁇ EL_L (NO in step F6), or when the standard deviation of the azimuth angle is not equal to or less than the threshold value TH ⁇ AZ (NO in step F8), the indoor / outdoor environment classification determination unit 4 The position where 1 is present is determined to be indoor (by the window) (step F10), and the process ends.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is outdoor (step F11), and ends.
- FIG. 9 is a flowchart schematically showing a third operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment.
- the third operation is to determine whether indoor or outdoor based on the combined standard deviation of the elevation angle and azimuth angle of the satellite. Refer to FIG. 6 for the components of the mobile terminal.
- the indoor / outdoor environment classification determination unit 4 calculates the combined standard deviation ⁇ EL-AZ of the elevation angle and azimuth angle of the satellite transmitting the receivable radio wave ( Step G2).
- the composite standard deviation ⁇ EL-AZ is expressed by the following formula 1. However, when the radio wave from the satellite is not received, the combined standard deviation ⁇ EL-AZ is zero.
- the indoor / outdoor environment classification determination unit 4 determines whether the calculated combined standard deviation ⁇ EL-AZ of the elevation angle and the azimuth is equal to or less than a preset threshold TH ⁇ EL-AZ (composite standard deviation threshold). (Step G3).
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoor. (Step G4), the process ends.
- step G5 If the combined standard deviation ⁇ EL-AZ of the elevation angle and the azimuth is not less than or equal to the threshold value TH ⁇ EL-AZ (NO in step G3), it is determined that the position where the mobile terminal 1 is present is outdoors (step G5), and the process ends.
- FIG. 10 is a flowchart schematically illustrating a fourth operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment.
- the fourth operation is not only to determine indoor or outdoor based on the combined standard deviation of the elevation angle and azimuth angle of the satellite, but also to determine whether it is indoor or outdoor. Refer to FIG. 6 for the components of the mobile terminal.
- the indoor / outdoor environment classification determination unit 4 determines that the calculated elevation and azimuth synthesized standard deviation ⁇ EL-AZ is a preset threshold TH ⁇ . It is determined whether it is equal to or less than EL-AZ_H (step H3).
- the indoor / outdoor environment classification determination unit 4 determines the combined standard deviation ⁇ of the calculated elevation angle and azimuth. It is determined whether EL-AZ is less than or equal to a preset threshold TH ⁇ EL-AZ_L (step H4).
- TH ⁇ EL-AZ_H > TH ⁇ EL-AZ_L .
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoor ) (Step H5), and the process ends.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoor (by the window). Determination is made (step H6), and the process ends.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is outdoor ( Step H7) ends.
- FIG. 11 is a flowchart schematically illustrating a fifth operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment.
- FIG. 12 is a sky plot diagram of GPS satellites for explaining a 3D (Dimension) azimuth area calculated by the fifth operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment. It is.
- the fifth operation is to determine whether indoor or outdoor based on the 3D azimuth area of the satellite. Refer to FIG. 6 for the components of the mobile terminal.
- the indoor / outdoor environment classification determination unit 4 calculates the 3D azimuth area of the satellite that is transmitting a receivable radio wave (step K2).
- the 3D azimuth area of the satellite can be calculated by, for example, the area of the hatched portion shown in FIG. Specifically, in FIG. 12, the east coordinate of the elevation angle 0 is (1, 0), the west coordinate is (-1, 0), the south coordinate is (0, -1), and the zenith coordinate is ( 0, 0) plot the elevation angle and azimuth angle of all satellites transmitting receivable radio waves in the plane coordinates called sky plot, and the minimum sector area on the sky plot including the coordinates of all satellites Ask.
- the minimum sector shape is a sector shape centered on the coordinate (0, 0) of the zenith.
- the indoor / outdoor environment classification determination unit 4 determines whether the calculated 3D azimuth area is equal to or less than a preset threshold TH 3D (3D azimuth area threshold) (step K3).
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 is present is indoors (step K4), and ends.
- step K3 If the 3D azimuth area is not equal to or less than the threshold TH 3D (NO in step K3), the mobile terminal 1 is determined to be outdoors (step K5) and the process ends.
- FIG. 13 is a flowchart schematically illustrating a sixth operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment.
- FIG. 14 is a GPS satellite sky diagram for explaining the degree of bias toward a low elevation angle and a specific direction calculated by the sixth operation of the indoor / outdoor environment classification determination unit of the mobile terminal in the indoor / outdoor determination system according to the second embodiment.
- FIG. The sixth operation is to determine whether indoor or outdoor based on the low elevation angle of the satellite and the degree of deviation in a specific direction. Refer to FIG. 6 for the components of the mobile terminal.
- the indoor / outdoor environment classification determination unit 4 has a low elevation angle (for example, 0 ° or more and less than 45 °) and a specific direction of a satellite transmitting a receivable radio wave.
- the degree of bias to is calculated (step K2).
- the indoor / outdoor environment classification determination unit 4 determines whether the calculated low elevation angle and the degree of bias in a specific direction are equal to or less than a preset threshold value TH EL_L-AZ (bias degree threshold value) (step L3).
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoors (step L4 ),finish.
- the mobile terminal 1 is determined to be outdoors (step L5), and the process ends.
- indoor / outdoor determination can be realized with higher accuracy than in the first embodiment.
- the reason for this is that in the second embodiment, in addition to the opening angle of the vertical plane of the window shown in the first embodiment, the index of determination of the opening angle of the horizontal plane is added from the indoor direction toward the window of the building. This is because the features can be grasped more accurately and indoor / outdoor determination can be made.
- FIG. 15 is a block diagram schematically illustrating the configuration of the indoor / outdoor determination system according to the third embodiment.
- the third embodiment is a modification of the second embodiment (see FIG. 6) and determines whether the mobile terminal 1 is indoors or outdoors and whether it is indoors or outdoors by a window based on information including ground height information. It is what you do.
- the mobile terminal 1 includes a ground height deriving unit 9 and a sensor 11 as means for acquiring ground height information.
- the ground height deriving unit 9 is a functional unit that derives the ground height using information (for example, atmospheric pressure) detected by the sensor 11.
- the ground height deriving unit 9 outputs the derived ground height information to the indoor / outdoor environment classification determining unit 4 and the data transmitting unit 5.
- the ground height deriving unit 9 may be realized by executing software in a computer, or may be realized by an integrated circuit.
- an atmospheric pressure sensor that detects atmospheric pressure can be used.
- the ground height can be calculated from atmospheric pressure information detected by the atmospheric pressure sensor.
- a beacon sensor that receives beacon information (including ground height information) installed at a predetermined ground height can be used as the sensor 11.
- the beacon information can be used as it is.
- an acceleration sensor can be used as the sensor 11.
- the ground height information can be calculated by time-integrating upward acceleration from a known location to obtain speed information, and further time-integrating to obtain the upward moving distance.
- the number of sensors 11 is not limited to one, and a plurality of sensors described above may be combined to calculate high-precision ground height information.
- the indoor / outdoor environment classification determination unit 4 has a function of determining the indoor / outdoor environment classification based on information including ground height information.
- the data transmission unit 5 can transmit data including ground height information.
- Other configurations are the same as those in the second embodiment. Note that the method of determining using ground clearance information as in the third embodiment may be applied to the first embodiment.
- the ground height deriving unit 9 outputs the derived ground height information to the indoor / outdoor environment classification determining unit 4 and the data transmitting unit 5.
- the indoor / outdoor environment classification determination unit 4 receives the ground height information from the ground height deriving unit 9 and receives the received ground height information and information from the GPS receiver 3 (position information, satellite elevation angle information, satellite direction). Based on the corner information), the environment classification of the position where the mobile terminal 1 exists is determined based on a predetermined operation, and the determination information resulting from the determination is output to the data transmission unit 5.
- the predetermined operation will be described later. Other operations are the same as those in the second embodiment.
- FIG. 16 is a flowchart schematically showing the operation of the mobile terminal in the indoor / outdoor determination system according to the third embodiment. This operation is based on the threshold TH ⁇ EL-AZ_H based on the ground height information when determining whether indoor or outdoor based on the combined standard deviation of the elevation angle and azimuth of the satellite and whether it is indoor or outdoor. , TH ⁇ EL-AZ_L is set. In addition, please refer FIG. 15 about the structure part of a mobile terminal.
- the indoor / outdoor environment classification determination unit 4 acquires the ground height information from the ground height deriving unit 9 (step M3).
- the indoor / outdoor environment classification determination unit 4 sets thresholds TH ⁇ EL-AZ_H (first combined standard deviation threshold) and TH ⁇ EL-AZ_L (second combined standard deviation threshold) based on the acquired ground height information. (Step M4).
- the magnitudes of the thresholds TH ⁇ EL-AZ_H and TH ⁇ EL-AZ_L are set based on the acquired ground height information. Note that TH ⁇ EL-AZ_H > TH ⁇ EL-AZ_L .
- the indoor / outdoor environment classification determination unit 4 determines whether or not the calculated combined standard deviation ⁇ EL-AZ of the elevation angle and the azimuth is equal to or smaller than the threshold value TH ⁇ EL-AZ_H (step M5).
- the indoor / outdoor environment classification determination unit 4 determines the combined standard deviation ⁇ of the calculated elevation angle and azimuth. It is determined whether EL-AZ is equal to or smaller than a preset threshold TH ⁇ EL-AZ_L (step M6).
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoor (side by the window) ) (Step M7) and the process ends.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is indoor (by the window). Determination is made (step M8), and the process is terminated.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is outdoor ( Step M9) ends.
- the indoor / outdoor determination can be realized with higher accuracy than the first embodiment.
- the reason for this is that, in places with high ground clearance, the number of surrounding buildings is small, and in many cases the sky is open and the line of sight is improved. This is because, by considering the tendency that the bias of the azimuth distribution is widened, it is possible to determine appropriate indoor and outdoor determination thresholds according to the ground height.
- FIG. 17 is a block diagram schematically illustrating the configuration of the indoor / outdoor determination system according to the fourth embodiment.
- the fourth embodiment is a modification of the third embodiment (see FIG. 15), and is indoor or outdoor based on the information including the moving speed information of the mobile terminal 1, whether indoors or near the window, and non- It is determined whether the vehicle is in the subway at the window and whether the vehicle is in a ground vehicle (for example, a train or automobile with a roof) at the window.
- the mobile terminal 1 includes a moving speed deriving unit 10 and an information source 12 as means for acquiring moving speed information.
- the moving speed deriving unit 10 is a functional unit that derives moving speed information based on information from the information source 12.
- the moving speed deriving unit 10 outputs the derived moving speed information to the indoor / outdoor environment classification determining unit 4 and the data transmitting unit 5.
- the moving speed deriving unit 10 may be realized by executing software in a computer or an integrated circuit.
- the information source 12 is a functional unit that outputs information serving as a basis for deriving the moving speed in the moving speed deriving unit 10.
- an acceleration sensor can be used as the information source 12.
- the moving speed information can be calculated by time-integrating the acceleration in the horizontal direction.
- the GPS receiver 3 can be used as the information source 12.
- a data receiving unit can be used as the information source 12.
- the data receiving unit can receive a plurality of cellular base station IDs (locations are known) and calculate the moving speed from the temporal difference.
- the information source 12 can use a beacon sensor (sensor 11), for example.
- beacon information can be received from a beacon installed in a predetermined location, and the moving speed can be calculated from the temporal difference.
- the information source 12 may calculate the moving speed information with high accuracy by combining the information sources described above.
- the indoor / outdoor environment classification determination unit 4 has a function of determining the indoor / outdoor environment classification based on information including movement speed information.
- the data transmission unit 5 can transmit data including movement speed information.
- Other configurations are the same as those in the third embodiment. Note that the method of determining using movement speed information as in the fourth embodiment may be applied to the first or second embodiment.
- the moving speed deriving unit 10 outputs the derived moving speed information to the indoor / outdoor environment classification determining unit 4 and the data transmitting unit 5.
- the indoor / outdoor environment classification determination unit 4 receives the movement speed information from the movement speed deriving unit 10 and receives the received movement speed information and information from the GPS receiver 3 (position information, satellite elevation angle information, satellite direction). Corner information) and the ground height information from the ground height deriving unit 9, the environment classification of the position where the mobile terminal 1 is present is determined based on a predetermined operation, and the resulting determination information is sent to the data transmitting unit Output to 5
- the predetermined operation will be described later. Other operations are the same as those in the third embodiment.
- FIG. 18 is a flowchart schematically showing the operation of the mobile terminal in the indoor / outdoor determination system according to the fourth embodiment.
- the operation is based on the combined standard deviation of the elevation angle and azimuth angle of the satellite, indoors or outdoors, and whether it is indoors by the window or non-window, and whether it is in the subway by the non-window, in the ground vehicle by the window Whether or not is determined.
- the indoor / outdoor environment The classification determination unit 4 acquires movement speed information from the movement speed deriving unit 10 (step N7).
- the indoor / outdoor environment classification determination unit 4 determines whether or not the moving speed included in the acquired moving speed information is equal to or higher than a threshold value TH MET (first moving speed threshold value) (step N8).
- the indoor / outdoor environment classification determining unit 4 determines that the position where the mobile terminal 1 exists is in an indoor (non-window) subway (step N9). ),finish.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 is located is indoors (outside the window) other than in the subway (step N10). ),finish.
- the indoor / outdoor environment classification determination unit 4 acquires the movement speed information from the movement speed derivation unit 10 ( Step N11).
- the indoor / outdoor environment classification determination unit 4 determines whether or not the moving speed included in the acquired moving speed information is equal to or greater than a threshold TH VEH (second moving speed threshold) (step N12).
- the threshold value TH VEH may be the same value as the threshold value TH MET or a different value.
- the indoor / outdoor environment classification determining unit 4 determines that the position where the mobile terminal 1 is present is in an indoor (by the window) ground vehicle (step N13). ),finish.
- the indoor / outdoor environment classification determining unit 4 determines that the position where the mobile terminal 1 exists is indoors (by the window) other than the ground vehicle (step N14). ),finish.
- the indoor / outdoor environment classification determination unit 4 determines that the position where the mobile terminal 1 exists is outdoor ( Step N15) is ended.
- the types of indoor environment classification determinations “in the ground vehicle” and “in the subway” are set. Can be increased. In other words, since it is possible to classify the ground vehicle as a moving indoor environment, by combining the movement speed information with the deviation of the direction in which the satellite that is transmitting the receivable radio wave exists, By adding the determination of the moving speed information to the result classified as “inside the window”, it is possible to determine “in the ground vehicle”.
- FIG. 19 is a block diagram schematically illustrating the configuration of the indoor / outdoor determination system according to the fifth embodiment.
- the fifth embodiment is a modification of the fourth embodiment (see FIG. 17), and instead of the indoor / outdoor environment classification determination unit (4 in FIG. 17) that is inside the mobile terminal (1 in FIG. 17), the mobile terminal. 1, an indoor / outdoor environment classification determination unit 21 is disposed outside.
- the mobile terminal 1 transmits data necessary for the determination to the data server 7 via the network 6.
- the data server 7 has a function of accumulating data from the mobile terminal 1 and transmitting a part of the accumulated data to the indoor / outdoor environment classification determination unit 21 in response to a request from the indoor / outdoor environment classification determination unit 21. .
- the indoor / outdoor environment classification determination unit 21 is disposed between the data server 7 and the indoor / outdoor environment classification visualization unit 8.
- the indoor / outdoor environment classification determination unit 21 determines the environmental classification of the position where the mobile terminal 1 exists by a predetermined operation, and outputs the result to the indoor / outdoor environment classification visualization unit 8.
- the predetermined operation here is the same as the predetermined operation of the fourth embodiment, and the predetermined operation of the first to third embodiments may be performed.
- the operation of the fifth embodiment is different only in that the processing of the indoor / outdoor environment classification determination unit 21 is performed between the processing of the data server 7 and the processing of the indoor / outdoor environment classification visualization unit 8, and the other operations are as follows. The same as in the fourth embodiment.
- the processing load on the mobile terminal associated with the indoor / outdoor determination is smaller than in the fourth embodiment, and the power consumption can be suppressed.
- Embodiment 5 is provided with an indoor / outdoor determination processing entity outside the mobile terminal 1, not inside the mobile terminal 1.
- the CPU (Central Processing Unit) of the mobile terminal 1 often has a low processing capacity due to the downsizing, but the fifth embodiment is remarkably effective when the processing capacity of the mobile terminal 1 is low.
- FIG. 20 is a block diagram schematically illustrating the configuration of the indoor / outdoor determination system according to the sixth embodiment.
- FIG. 21 is a flowchart schematically illustrating the operation of the indoor / outdoor environment classification determination unit in the indoor / outdoor determination system according to the sixth embodiment.
- the indoor / outdoor determination system 100 is a system for determining whether the mobile terminal 1 is indoors or outdoors (see FIG. 20).
- the indoor / outdoor determination system 100 includes an indoor / outdoor environment classification determination unit 31.
- the indoor / outdoor environment classification determination unit 31 is a functional unit realized by executing an indoor / outdoor determination program for determining whether a mobile terminal is indoor or outdoor using hardware resources.
- the indoor / outdoor environment classification determination unit 31 acquires at least one of satellite elevation angle information and satellite azimuth information directly or indirectly from the satellite receiver 30 provided in the mobile terminal 1 (step S1 in FIG. 21). .
- the indoor / outdoor environment classification determination unit 31 determines whether the mobile terminal 1 is indoor or outdoor based on at least one of satellite elevation angle information and satellite azimuth angle information (step S2 in FIG. 21). Note that the indoor / outdoor environment classification determination unit 31 exists inside the mobile terminal 1 in FIG. 20, but may exist outside the mobile terminal 1.
- the outdoor / indoor determination can be realized by using the physical statistical value indicating the property that the direction of the satellite transmitting the radio wave that can be received in the building is biased at a low elevation angle as an index. Therefore, the indoor / outdoor can be determined with higher accuracy than the determination method based on the satellite reception intensity that makes it difficult to set the threshold.
- the step of counting the number of first satellites existing in the range of the first elevation angle based on the satellite elevation angle information, and the first based on the satellite elevation angle information Counting the number of second satellites present in a second elevation angle range higher than the elevation angle range, and calculating a satellite number ratio between the first satellite number and the second satellite number; Performing a step of determining indoor when the satellite number ratio is equal to or greater than a preset satellite number ratio threshold and a step of determining outdoor when the satellite number ratio is not equal to or greater than the satellite number ratio threshold.
- a step of determining outdoor when not below the threshold, a step of determining outdoor when the maximum elevation angle is not below the preset maximum threshold value, and the elevation standard deviation is a preset elevation standard deviation is a preset elevation standard deviation.
- a step of determining outdoor when not below the threshold value, a step of determining outdoor when the maximum elevation angle value is not below the preset maximum threshold value threshold value, and a first elevation angle at which the elevation standard deviation is set in advance A step of determining outdoor when it is not equal to or less than a standard deviation threshold; the elevation angle average value is equal to or less than the elevation angle average value threshold; the elevation angle maximum value is equal to or less than the elevation angle maximum value threshold; and the elevation angle standard deviation is a first elevation angle standard deviation When it is equal to or smaller than a threshold value, it is determined whether or not the elevation angle standard deviation is equal to or smaller than a second elevation angle standard deviation threshold value that is lower than a preset first elevation angle standard deviation threshold value. And a step of determining indoor non-window
- a step of determining outdoor when not below the threshold value, a step of determining outdoor when the maximum elevation angle value is not below the preset maximum threshold value threshold value, and a first elevation angle at which the elevation standard deviation is set in advance A step of determining outdoor when it is not equal to or less than a standard deviation threshold; the elevation angle average value is equal to or less than the elevation angle average value threshold; the elevation angle maximum value is equal to or less than the elevation angle maximum value threshold; and the elevation angle standard deviation is a first elevation angle standard deviation When it is equal to or smaller than a threshold value, it is determined whether or not the elevation angle standard deviation is equal to or smaller than a second elevation angle standard deviation threshold value that is lower than a preset first elevation angle standard deviation threshold value.
- a step of determining outdoor when not below the threshold value, a step of determining outdoor when the maximum elevation angle value is not below the preset maximum threshold value threshold value, and a first elevation angle at which the elevation standard deviation is set in advance A step of determining outdoor when it is not equal to or less than the standard deviation threshold; the elevation angle average value is equal to or less than the elevation angle average value threshold; the elevation angle maximum value is equal to or less than the elevation angle maximum value threshold; and the elevation angle standard deviation is the first elevation angle standard When it is less than or equal to a deviation threshold, it is determined whether or not the elevation angle standard deviation is less than or equal to a second elevation angle standard deviation threshold that is lower than a preset first elevation angle standard deviation threshold.
- the step of determining indoor non-window side and the step of determining indoor side when the combined standard deviation is not less than or equal to the second combined standard deviation threshold value are executed.
- a predetermined elevation angle of a satellite transmitting a receivable radio wave and a degree of bias in a specific direction are calculated.
- the moving speed information obtained directly or indirectly from the moving speed deriving unit is greater than or equal to a preset second moving speed threshold Determining whether or not the vehicle is within the ground vehicle when the moving speed information is equal to or greater than the second moving speed threshold, and the moving speed information is the second moving speed threshold. To execute, determining that indoor window side when not more.
- the mobile terminal further includes a sensor and a ground height deriving unit that derives the ground height using information detected by the sensor.
- the mobile terminal further includes an information source and a moving speed deriving unit that derives moving speed information based on information from the information source.
- the step of counting the number of first satellites existing in the range of the first elevation angle based on the satellite elevation angle information, and the first based on the satellite elevation angle information Counting the number of second satellites present in a second elevation angle range higher than the elevation angle range, and calculating a satellite number ratio between the first satellite number and the second satellite number. Determining the outdoor when the satellite number ratio is not equal to or greater than a preset first satellite number ratio threshold; and when the satellite number ratio is equal to or greater than the first satellite number ratio threshold.
- Determining whether or not is greater than or equal to a preset second satellite number ratio threshold higher than the preset first satellite number ratio threshold, and when the satellite number ratio is greater than or equal to the second satellite number ratio threshold A step of determining that the window is indoors, and the ratio of the number of satellites is the number of the second satellites. Including the step of determining the indoor window side when not equal to or higher than the threshold value.
- a step of determining outdoor when not below the threshold, a step of determining outdoor when the maximum elevation angle is not below the preset maximum threshold value, and the elevation standard deviation being a preset elevation standard deviation A step of determining outdoor when not below a threshold value, the average elevation angle value is below the elevation angle average value threshold value, the elevation angle maximum value is below the elevation angle maximum value threshold value, and the elevation angle standard deviation is below the elevation angle standard deviation threshold value
- a step of determining indoors at a certain time is a certain time.
- a step of determining outdoor when not below the threshold, a step of determining outdoor when the maximum elevation angle is not below the preset maximum threshold value, and a first elevation angle at which the elevation standard deviation is set in advance A step of determining outdoor when it is not equal to or less than a standard deviation threshold; the elevation angle average value is equal to or less than the elevation angle average value threshold; the elevation angle maximum value is equal to or less than the elevation angle maximum value threshold; and the elevation angle standard deviation is a first elevation angle standard deviation Determining whether the elevation standard deviation is less than or equal to a second elevation standard deviation threshold that is lower than a preset first elevation standard deviation threshold when the elevation standard deviation is less than or equal to a threshold; Determining when the window is indoors non-windowed when the angle is equal to or less than the second elevation angle standard deviation threshold, and determining when the window is indoors when the elevation angle standard deviation is not equal to or less than the second elevation angle standard deviation threshold.
- a step of determining outdoor when not below the threshold, a step of determining outdoor when the maximum elevation angle is not below the preset maximum threshold value, and a first elevation angle at which the elevation standard deviation is set in advance A step of determining outdoor when it is not equal to or less than a standard deviation threshold; the elevation angle average value is equal to or less than the elevation angle average value threshold; the elevation angle maximum value is equal to or less than the elevation angle maximum value threshold; and the elevation angle standard deviation is a first elevation angle standard deviation Determining whether the elevation standard deviation is less than or equal to a second elevation standard deviation threshold that is lower than a preset first elevation standard deviation threshold when the elevation standard deviation is less than or equal to a threshold; Is determined based on the satellite azimuth information when the elevation angle standard deviation is equal to or smaller than the second elevation angle standard deviation threshold.
- a step of determining outdoor when not below the threshold, a step of determining outdoor when the maximum elevation angle is not below the preset maximum threshold value, and a first elevation angle at which the elevation standard deviation is set in advance A step of determining outdoor when it is not equal to or less than a standard deviation threshold; the elevation average value is equal to or less than the elevation angle average value threshold; the elevation angle maximum value is equal to or less than the elevation angle maximum value threshold; and the elevation angle standard deviation is the first elevation angle standard Determining whether the elevation standard deviation is less than or equal to a second elevation standard deviation threshold lower than the first elevation standard deviation threshold set in advance when the elevation standard deviation is less than or equal to a deviation threshold; When the deviation is not less than or equal to the second elevation angle standard deviation threshold, the step of determining that the window is indoor, and when the elevation angle standard deviation is less than or equal to the second elevation angle standard deviation threshold, reception based on the satellite azimuth information A step of calculating an azimuth standard deviation of a satellite that is transmitting a possible radio wave, and a
- a step of calculating a combined standard deviation of an elevation angle and an azimuth angle of a satellite that is transmitting a receivable radio wave based on the satellite elevation angle information and the satellite azimuth angle information Determining that the composite standard deviation is outdoors when the composite standard deviation is not less than or equal to a preset first composite standard deviation threshold; and when the composite standard deviation is less than or equal to the first composite standard deviation threshold Determining whether a deviation is equal to or smaller than a second synthetic standard deviation threshold lower than a preset first synthetic standard deviation threshold; and the synthetic standard deviation is equal to or smaller than the second synthetic standard deviation threshold. And determining the indoor non-window side and determining the indoor window side when the combined standard deviation is not less than or equal to the second combined standard deviation threshold.
- a predetermined elevation angle and a degree of bias in a specific direction of a satellite transmitting a receivable radio wave are calculated based on the satellite elevation angle information and the satellite azimuth angle information. And a step of determining indoors when the degree of bias is less than or equal to a preset bias degree threshold, and a step of determining outdoor when the degree of bias is not less than or equal to the bias degree threshold.
- the moving speed information obtained directly or indirectly from the moving speed deriving unit provided in the mobile terminal is greater than or equal to a preset first moving speed threshold
- the mobile terminal according to the fifth viewpoint is possible.
- the mobile terminal further includes a sensor and a ground height deriving unit that derives the ground height using information detected by the sensor.
- the mobile terminal further includes an information source and a moving speed deriving unit that derives moving speed information based on information from the information source.
- the number of first satellites existing in the first elevation angle range is counted based on the satellite elevation angle information, and the first number of satellites is counted based on the satellite elevation angle information.
- the number of first satellites existing in the first elevation angle range is counted based on the satellite elevation angle information, and the first number of satellites is counted based on the satellite elevation angle information.
- the number ratio is not equal to or greater than a preset first satellite number ratio threshold, it is determined that the outdoor, and when the number ratio is equal to or greater than the first satellite number ratio threshold, the satellite number ratio is preset. It is determined whether or not the second satellite number ratio threshold value is higher than the first satellite number ratio threshold value.
- the satellite number ratio is equal to or higher than the second satellite number ratio threshold value, it is determined that the window is not indoors.
- Judges judges.
- an elevation angle average value, an elevation angle maximum value, and an elevation angle standard deviation are calculated based on the satellite elevation angle information, and the elevation angle average value is a preset elevation angle average value.
- the maximum elevation angle value is not less than the preset elevation angle maximum value threshold value, it is determined outdoors, and when the elevation angle standard deviation is not less than the preset elevation angle standard deviation threshold value.
- the average elevation angle value is equal to or less than the elevation angle average value threshold value
- the maximum elevation angle value is equal to or less than the maximum elevation angle value threshold value
- the elevation angle standard deviation is equal to or less than the elevation angle standard deviation threshold value.
- an elevation angle average value, an elevation angle maximum value, and an elevation angle standard deviation are calculated based on the satellite elevation angle information, and the elevation angle average value is a preset elevation angle average value.
- the maximum elevation angle value is not less than or equal to a preset elevation angle maximum value threshold value, it is determined to be outdoors and the elevation angle standard deviation is less than or equal to a preset first elevation angle standard deviation threshold value.
- the maximum elevation angle value is equal to or less than the elevation angle maximum value threshold value
- the elevation angle standard deviation is equal to or less than the first elevation angle standard deviation threshold value. Determining whether the elevation standard deviation is equal to or less than a second elevation angle standard deviation threshold lower than a preset first elevation angle standard deviation threshold, and the elevation standard deviation is equal to or less than the second elevation angle standard deviation threshold. so Determines that the non-window side of the indoors Rutoki determines that indoor window side when the elevation angle standard deviation is not less than or equal to the second elevation standard deviation threshold.
- an elevation angle average value, an elevation angle maximum value, and an elevation angle standard deviation are calculated based on the satellite elevation angle information, and the elevation angle average value is a preset elevation angle average value.
- the maximum elevation angle value is not less than or equal to a preset elevation angle maximum value threshold value, it is determined to be outdoors and the elevation angle standard deviation is less than or equal to a preset first elevation angle standard deviation threshold value.
- the maximum elevation angle value is equal to or less than the elevation angle maximum value threshold value
- the elevation angle standard deviation is equal to or less than the first elevation angle standard deviation threshold value. Determining whether the elevation standard deviation is equal to or less than a second elevation angle standard deviation threshold lower than a preset first elevation angle standard deviation threshold, and the elevation standard deviation is equal to or less than the second elevation angle standard deviation threshold.
- the azimuth angle of the satellite transmitting the receivable radio wave based on the satellite azimuth angle information when it is determined that the window is indoor and the elevation standard deviation is equal to or smaller than the second elevation angle standard deviation threshold A width is calculated, and when the azimuth width is equal to or less than a preset azimuth width threshold, it is determined as indoor non-window, and when the azimuth width is not equal to or less than the azimuth width threshold, judge.
- an elevation angle average value, an elevation angle maximum value, and an elevation angle standard deviation are calculated based on the satellite elevation angle information, and the elevation angle average value is a preset elevation angle average value.
- the maximum elevation angle value is not less than or equal to a preset elevation angle maximum value threshold value, it is determined to be outdoors and the elevation angle standard deviation is less than or equal to a preset first elevation angle standard deviation threshold value.
- the maximum elevation angle value is equal to or less than the maximum elevation angle threshold value
- the elevation angle standard deviation is equal to or less than the first elevation angle standard deviation threshold value.
- it is determined whether or not the elevation standard deviation is equal to or less than a second elevation standard deviation threshold lower than a preset first elevation standard deviation threshold, and the elevation standard deviation is the second elevation standard deviation threshold.
- the azimuth angle of the satellite that is transmitting a receivable radio wave based on the satellite azimuth angle information when the elevation standard deviation is equal to or smaller than the second elevation angle standard deviation threshold When a standard deviation is calculated, it is determined that the indoor azimuth standard deviation is equal to or less than a preset azimuth standard deviation threshold, and the indoor azimuth standard deviation is not less than the azimuth standard deviation threshold. It is determined that the window is indoors.
- a combined standard deviation of the elevation angle and the azimuth angle of the satellite transmitting the receivable radio wave is calculated.
- the combined standard deviation is equal to or less than a preset combined standard deviation threshold, it is determined to be indoor, and when the combined standard deviation is not equal to or less than the combined standard deviation threshold, it is determined to be outdoor.
- a combined standard deviation of the elevation angle and the azimuth angle of the satellite transmitting the receivable radio wave is calculated.
- the composite standard deviation is not less than or equal to a preset first composite standard deviation threshold value
- the indoor / outdoor environment classification determination unit calculates a 3D azimuth area of a satellite transmitting a receivable radio wave based on the satellite elevation angle information and the satellite azimuth angle information, and the 3D When the azimuth area is equal to or less than a preset 3D azimuth area threshold, it is determined to be indoor, and when the 3D azimuth area is not equal to or less than the 3D azimuth area threshold, it is determined to be outdoor.
- the indoor / outdoor environment classification determination unit determines a predetermined satellite of a receivable radio wave based on the satellite elevation angle information and the satellite azimuth angle information. Is calculated when the degree of elevation is equal to or less than a preset degree-of-bias threshold, and when the degree of deviation is not less than the degree-of-bias threshold. .
- the indoor / outdoor environment classification determination unit includes an elevation angle of a satellite transmitting a receivable radio wave based on the satellite elevation angle information and the satellite azimuth angle information. And a first standard deviation threshold value and the first standard deviation based on ground height information directly or indirectly obtained from a ground height deriving unit provided in the mobile terminal. A second standard deviation threshold value lower than the threshold value is set, and when the composite standard deviation is not less than or equal to the first composite standard deviation threshold value, it is determined to be outdoors, and the composite standard deviation is less than or equal to the first composite standard deviation threshold value.
- the composite standard deviation is equal to or less than a second composite standard deviation threshold that is lower than a preset first composite standard deviation threshold, and the composite standard deviation is the second composite standard.
- a second composite standard deviation threshold that is lower than a preset first composite standard deviation threshold
- the composite standard deviation is the second composite standard.
- a combined standard deviation of the elevation angle and the azimuth angle of the satellite transmitting the receivable radio wave is calculated.
- a first standard deviation threshold value and a second standard deviation threshold value lower than the first standard deviation threshold value based on the ground height information directly or indirectly obtained from the ground height deriving unit provided in the mobile terminal.
- the composite standard deviation is not less than or equal to the first composite standard deviation threshold, it is determined that the outdoor, and when the composite standard deviation is less than or equal to the first composite standard deviation threshold, the composite standard deviation is , Determining whether or not the second synthetic standard deviation threshold value is lower than a preset first synthetic standard deviation threshold value, and when the synthetic standard deviation is less than or equal to the second synthetic standard deviation threshold value, Prepared for mobile terminals It is determined whether the moving speed information obtained directly or indirectly from the moving speed deriving unit is equal to or greater than a preset first moving speed threshold, and the moving speed information is equal to or greater than the first moving speed threshold.
- Mobile terminal 2 GPS antenna 3 GPS receiver (satellite receiver) 4 Indoor / Outdoor Environment Classification Determination Unit 5 Data Transmission Unit 6 Network 7 Data Server 8 Indoor / Outdoor Environment Classification Visualization Unit 9 Ground Height Derivation Unit 10 Movement Speed Derivation Unit 11 Sensor 12 Information Source 21 Indoor / Outdoor Environment Classification Determination Unit 30 Satellite Receiver 31 Indoor / outdoor environmental classification judgment unit 100 Indoor / outdoor judgment system
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Abstract
Description
実施形態1に係る屋内外判定システムについて図面を用いて説明する。図1は、実施形態1に係る屋内外判定システムの構成を模式的に示したブロック図である。
第1の動作について図面を用いて説明する。図2は、実施形態1に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第1の動作を模式的に示したフローチャート図である。第1の動作は、低仰角、高仰角の衛星数比に基づいて屋内か屋外かを判定するものである。なお、移動端末の構成部については、図1を参照されたい。
第2の動作について図面を用いて説明する。図3は、実施形態1に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第2の動作を模式的に示したフローチャート図である。第2の動作は、低仰角、高仰角の衛星数比に基づいて屋内か屋外かを判定するだけでなく屋内において窓際か非窓際かを判定するものである。なお、移動端末の構成部については、図1を参照されたい。
第3の動作について図面を用いて説明する。図4は、実施形態1に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第3の動作を模式的に示したフローチャート図である。第3の動作は、衛星の仰角の統計値(平均値、最大値、標準偏差)に基づいて屋内か屋外かを判定するものである。なお、移動端末の構成部については、図1を参照されたい。
第4の動作について図面を用いて説明する。図5は、実施形態1に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第4の動作を模式的に示したフローチャート図である。第4の動作は、衛星の仰角の統計値(平均値、最大値、標準偏差)に基づいて屋内か屋外かを判定するだけでなく屋内において窓際か非窓際かを判定するものである。なお、移動端末の構成部については、図1を参照されたい。
実施形態2に係る屋内外判定システムについて図面を用いて説明する。図6は、実施形態2に係る屋内外判定システムの構成を模式的に示したブロック図である。
なお、所定の動作については、後述する。その他の動作については、実施形態1と同様である。
第1の動作について図面を用いて説明する。図7は、実施形態2に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第1の動作を模式的に示したフローチャート図である。第1の動作は、衛星の仰角の統計値(平均値、最大値、標準偏差)に基づいて屋内か屋外か及び窓際か非窓際かを判定するだけでなく衛星の方位角幅に基づいて窓際か非窓際かを判定するものである。なお、移動端末の構成部については、図6を参照されたい。
第2の動作について図面を用いて説明する。図8は、実施形態2に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第2の動作を模式的に示したフローチャート図である。第2の動作は、衛星の仰角の統計値(平均値、最大値、標準偏差)に基づいて屋内か屋外か及び窓際か非窓際かを判定するだけでなく衛星の方位角の標準偏差に基づいて窓際か非窓際かを判定するものである。なお、移動端末の構成部については、図6を参照されたい。
第3の動作について図面を用いて説明する。図9は、実施形態2に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第3の動作を模式的に示したフローチャート図である。第3の動作は、衛星の仰角と方位角の合成標準偏差に基づいて屋内か屋外かを判定するものである。なお、移動端末の構成部については、図6を参照されたい。
なお、合成標準偏差σEL-AZは、以下の数式1で表現される。ただし、衛星からの電波が受信されない場合は、合成標準偏差σEL-AZは0である。
第4の動作について図面を用いて説明する。図10は、実施形態2に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第4の動作を模式的に示したフローチャート図である。第4の動作は、衛星の仰角と方位角の合成標準偏差に基づいて屋内か屋外かを判定するだけでなく屋内において窓際か非窓際かを判定するものである。なお、移動端末の構成部については、図6を参照されたい。
第5の動作について図面を用いて説明する。図11は、実施形態2に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第5の動作を模式的に示したフローチャート図である。図12は、実施形態2に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第5の動作で算出される3D(Dimension)方位角面積を説明するためのGPS衛星のスカイプロット図である。第5の動作は、衛星の3D方位角面積に基づいて屋内か屋外かを判定するものである。なお、移動端末の構成部については、図6を参照されたい。
第6の動作について図面を用いて説明する。図13は、実施形態2に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第6の動作を模式的に示したフローチャート図である。図14は、実施形態2に係る屋内外判定システムにおける移動端末の屋内外環境分類判定部の第6の動作で算出される低仰角かつ特定方位への偏り度を説明するためのGPS衛星のスカイプロット図である。第6の動作は、衛星の低仰角かつ特定方向への偏り度に基づいて屋内か屋外かを判定するものである。なお、移動端末の構成部については、図6を参照されたい。
実施形態3に係る屋内外判定システムについて図面を用いて説明する。図15は、実施形態3に係る屋内外判定システムの構成を模式的に示したブロック図である。
実施形態4に係る屋内外判定システムについて図面を用いて説明する。図17は、実施形態4に係る屋内外判定システムの構成を模式的に示したブロック図である。
実施形態5に係る屋内外判定システムについて図面を用いて説明する。図19は、実施形態5に係る屋内外判定システムの構成を模式的に示したブロック図である。
実施形態6に係る屋内外判定システムについて図面を用いて説明する。図20は、実施形態6に係る屋内外判定システムの構成を模式的に示したブロック図である。図21は、実施形態6に係る屋内外判定システムにおける屋内外環境分類判定部の動作を模式的に示したフローチャート図である。
本発明では、前記第1の視点に係る屋内外判定プログラムの形態が可能である。
を実行させる。
すなわち、本発明は、請求の範囲及び図面を含む全開示、技術的思想にしたがって当業者であればなし得るであろう各種変形、修正を含むことは勿論である。また、本願に記載の数値及び数値範囲については、明記がなくともその任意の中間値、下位数値、及び、小範囲が記載されているものとみなされる。
2 GPSアンテナ
3 GPS受信機(衛星受信機)
4 屋内外環境分類判定部
5 データ送信部
6 ネットワーク
7 データサーバ
8 屋内外環境分類可視化部
9 地上高導出部
10 移動速度導出部
11 センサ
12 情報源
21 屋内外環境分類判定部
30 衛星受信機
31 屋内外環境分類判定部
100 屋内外判定システム
Claims (30)
- ハードウェア資源を用いて移動端末の存在が屋内か屋外かを判定する動作を実行させる屋内外判定プログラムであって、
移動端末に備えられた衛星受信機から直接的又は間接的に取得した衛星仰角情報及び衛星方位角情報の少なくとも1つに基づいて前記移動端末の存在が屋内か屋外かを判定するステップを実行させる、
屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報に基づいて第1の仰角の範囲に存在する第1の衛星数をカウントするステップと、
前記衛星仰角情報に基づいて前記第1の仰角の範囲よりも高い第2の仰角の範囲に存在する第2の衛星数をカウントするステップと、
前記第1の衛星数と前記第2の衛星数との衛星数比を算出するステップと、前記衛星数比が、予め設定された衛星数比閾値以上であるときに屋内と判定するステップと、
前記衛星数比が前記衛星数比閾値以上でないときに屋外と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報に基づいて第1の仰角の範囲に存在する第1の衛星数をカウントするステップと、
前記衛星仰角情報に基づいて前記第1の仰角の範囲よりも高い第2の仰角の範囲に存在する第2の衛星数をカウントするステップと、
前記第1の衛星数と前記第2の衛星数との衛星数比を算出するステップと、前記衛星数比が、予め設定された第1衛星数比閾値以上でないときに屋外と判定するステップと、
前記衛星数比が前記第1衛星数比閾値以上であるときに、前記衛星数比が、予め設定された前記第1衛星数比閾値よりも高い第2衛星数比閾値以上であるか否かを判断するステップと、
前記衛星数比が前記第2衛星数比閾値以上であるときに屋内の非窓際と判定するステップと、
前記衛星数比が前記第2衛星数比閾値以上でないときに屋内の窓際と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報に基づいて仰角平均値、仰角最大値及び仰角標準偏差を算出するステップと、
前記仰角平均値が、予め設定された仰角平均値閾値以下でないときに屋外と判定するステップと、
前記仰角最大値が、予め設定された仰角最大値閾値以下でないときに屋外と判定するステップと、
前記仰角標準偏差が、予め設定された仰角標準偏差閾値以下でないときに屋外と判定するステップと、
前記仰角平均値が前記仰角平均値閾値以下、前記仰角最大値が前記仰角最大値閾値以下、かつ、前記仰角標準偏差が前記仰角標準偏差閾値以下であるときに屋内と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報に基づいて仰角平均値、仰角最大値及び仰角標準偏差を算出するステップと、
前記仰角平均値が、予め設定された仰角平均値閾値以下でないときに屋外と判定するステップと、
前記仰角最大値が、予め設定された仰角最大値閾値以下でないときに屋外と判定するステップと、
前記仰角標準偏差が、予め設定された第1仰角標準偏差閾値以下でないときに屋外と判定するステップと、
前記仰角平均値が前記仰角平均値閾値以下、前記仰角最大値が前記仰角最大値閾値以下、かつ、前記仰角標準偏差が第1仰角標準偏差閾値以下であるときに、前記仰角標準偏差が、予め設定された前記第1仰角標準偏差閾値よりも低い第2仰角標準偏差閾値以下であるか否かを判断するステップと、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下であるときに屋内の非窓際と判定するステップと、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下でないときに屋内の窓際と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報に基づいて仰角平均値、仰角最大値及び仰角標準偏差を算出するステップと、
前記仰角平均値が、予め設定された仰角平均値閾値以下でないときに屋外と判定するステップと、
前記仰角最大値が、予め設定された仰角最大値閾値以下でないときに屋外と判定するステップと、
前記仰角標準偏差が、予め設定された第1仰角標準偏差閾値以下でないときに屋外と判定するステップと、
前記仰角平均値が前記仰角平均値閾値以下、前記仰角最大値が前記仰角最大値閾値以下、かつ、前記仰角標準偏差が第1仰角標準偏差閾値以下であるときに、前記仰角標準偏差が、予め設定された前記第1仰角標準偏差閾値よりも低い第2仰角標準偏差閾値以下であるか否かを判断するステップと、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下でないときに屋内の窓際と判定するステップと、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下であるときに、前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の方位角幅を算出するステップと、
前記方位角幅が、予め設定された方位角幅閾値以下であるときに屋内の非窓際と判定するステップと、
前記方位角幅が前記方位角幅閾値以下でないときに屋内の窓際と判定するステップと、を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報に基づいて仰角平均値、仰角最大値及び仰角標準偏差を算出するステップと、
前記仰角平均値が、予め設定された仰角平均値閾値以下でないときに屋外と判定するステップと、
前記仰角最大値が、予め設定された仰角最大値閾値以下でないときに屋外と判定するステップと、
前記仰角標準偏差が、予め設定された第1仰角標準偏差閾値以下でないときに屋外と判定するステップと、
前記仰角平均値が前記仰角平均値閾値以下、前記仰角最大値が前記仰角最大値閾値以下、かつ、前記仰角標準偏差が前記第1仰角標準偏差閾値以下であるときに、前記仰角標準偏差が、予め設定された前記第1仰角標準偏差閾値よりも低い第2仰角標準偏差閾値以下であるか否かを判断するステップと、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下でないときに屋内の窓際と判定するステップと、前記仰角標準偏差が前記第2仰角標準偏差閾値以下であるときに、前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の方位角標準偏差を算出するステップと、
前記方位角標準偏差が、予め設定された方位角標準偏差閾値以下であるときに屋内の非窓際と判定するステップと、
前記方位角標準偏差が前記方位角標準偏差閾値以下でないときに屋内の窓際と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の仰角と方位角の合成標準偏差を算出するステップと、
前記合成標準偏差が、予め設定された合成標準偏差閾値以下であるときに屋内と判定するステップと、
前記合成標準偏差が前記合成標準偏差閾値以下でないときに屋外と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の仰角と方位角の合成標準偏差を算出するステップと、
前記合成標準偏差が、予め設定された第1合成標準偏差閾値以下でないときに屋外と判定するステップと、
前記合成標準偏差が前記第1合成標準偏差閾値以下であるときに、前記合成標準偏差が、予め設定された前記第1合成標準偏差閾値よりも低い第2合成標準偏差閾値以下であるか否かを判断するステップと、
前記合成標準偏差が前記第2合成標準偏差閾値以下であるときに屋内の非窓際と判定するステップと、
前記合成標準偏差が前記第2合成標準偏差閾値以下でないときに屋内の窓際と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の3D方位角面積を算出するステップと、
前記3D方位角面積が、予め設定された3D方位角面積閾値以下であるときに屋内と判定するステップと、
前記3D方位角面積が前記3D方位角面積閾値以下でないときに屋外と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の所定の仰角かつ特定方向の偏り度を算出するステップと、
前記偏り度が、予め設定された偏り度閾値以下であるときに屋内と判定するステップと、
前記偏り度が前記偏り度閾値以下でないときに屋外と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の仰角と方位角の合成標準偏差を算出するステップと、
前記移動端末に備えられた地上高導出手段から直接的又は間接的に取得した地上高情報に基づいて、第1標準偏差閾値と、前記第1標準偏差閾値よりも低い第2標準偏差閾値と、を設定するステップと、
前記合成標準偏差が前記第1合成標準偏差閾値以下でないときに屋外と判定するステップと、
前記合成標準偏差が前記第1合成標準偏差閾値以下であるときに、前記合成標準偏差が、予め設定された前記第1合成標準偏差閾値よりも低い第2合成標準偏差閾値以下であるか否かを判断するステップと、
前記合成標準偏差が前記第2合成標準偏差閾値以下であるときに屋内の非窓際と判定するステップと、
前記合成標準偏差が前記第2合成標準偏差閾値以下でないときに屋内の窓際と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の仰角と方位角の合成標準偏差を算出するステップと、
前記移動端末に備えられた地上高導出手段から直接的又は間接的に取得した地上高情報に基づいて、第1標準偏差閾値と、前記第1標準偏差閾値よりも低い第2標準偏差閾値と、を設定するステップと、
前記合成標準偏差が前記第1合成標準偏差閾値以下でないときに屋外と判定するステップと、
前記合成標準偏差が前記第1合成標準偏差閾値以下であるときに、前記合成標準偏差が、予め設定された前記第1合成標準偏差閾値よりも低い第2合成標準偏差閾値以下であるか否かを判断するステップと、
前記合成標準偏差が前記第2合成標準偏差閾値以下であるときに、前記移動端末に備えられた移動速度導出手段から直接的又は間接的に取得した移動速度情報が、予め設定された第1移動速度閾値以上であるか否かを判断するステップと、
前記移動速度情報が前記第1移動速度閾値以上であるときに地下鉄内と判定するステップと、
前記移動速度情報が前記第1移動速度閾値以上でないときに屋内の非窓際と判定するステップと、
前記合成標準偏差が前記第2合成標準偏差閾値以下であるときに、前記移動速度導出手段から直接的又は間接的に取得した移動速度情報が、予め設定された第2移動速度閾値以上であるか否かを判断するステップと、
前記移動速度情報が前記第2移動速度閾値以上であるときに地上車両内と判定するステップと、
前記移動速度情報が前記第2移動速度閾値以上でないときに屋内の窓際と判定するステップと、
を実行させる、
請求項1記載の屋内外判定プログラムが記録された記録媒体。 - 衛星信号を受信するとともに、前記衛星信号に含まれる衛星の軌道情報を用いて衛星仰角情報及び衛星方位角情報の少なくとも1つを算出する衛星受信機と、前記衛星受信機から取得した衛星仰角情報及び衛星方位角情報の少なくとも1つに基づいて移動端末の存在が屋内か屋外かを判定する屋内外環境分類判定手段と、を備える移動端末と、
前記移動端末とネットワークを介して通信可能に接続されるとともに、前記移動端末からのデータを蓄積するデータサーバと、
前記データサーバに対して屋内外環境分類データの作成に必要なデータを要求し、前記データサーバから取得したデータを地図上にプロットして屋内外環境分類データを作成し、作成した屋内外環境分類データを地理的分布として表示する屋内外環境分類可視化手段と、
を備える、
屋内外判定システム。 - 衛星信号を受信するとともに、前記衛星信号に含まれる衛星の軌道情報を用いて衛星仰角情報及び衛星方位角情報の少なくとも1つを算出する衛星受信機を備える移動端末と、 前記移動端末とネットワークを介して通信可能に接続されるとともに、前記移動端末からの前記衛星仰角情報及び前記衛星方位角情報の少なくとも1つを含むデータを蓄積するデータサーバと、
前記データサーバから取得した衛星仰角情報及び衛星方位角情報の少なくとも1つに基づいて前記移動端末の存在が屋内か屋外かを判定する屋内外環境分類判定手段と、
前記データサーバから取得したデータ、及び、前記屋内外環境分類判定手段から取得した判定結果に基づいて地図上にプロットして屋内外環境分類データを作成し、作成した屋内外環境分類データを地理的分布として表示する屋内外環境分類可視化手段と、
を備える、
屋内外判定システム。 - ハードウェア資源を用いて移動端末の存在が屋内か屋外かを判定する屋内外判定方法であって、移動端末に備えられた衛星受信機から直接的又は間接的に取得した衛星仰角情報及び衛星方位角情報の少なくとも1つに基づいて前記移動端末の存在が屋内か屋外かを判定する、
屋内外判定方法。 - 前記衛星仰角情報に基づいて第1の仰角の範囲に存在する第1の衛星数をカウントし、
前記衛星仰角情報に基づいて前記第1の仰角の範囲よりも高い第2の仰角の範囲に存在する第2の衛星数をカウントし、
前記第1の衛星数と前記第2の衛星数との衛星数比を算出し、
前記衛星数比が、予め設定された衛星数比閾値以上であるときに屋内と判定し、
前記衛星数比が前記衛星数比閾値以上でないときに屋外と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報に基づいて第1の仰角の範囲に存在する第1の衛星数をカウントし、
前記衛星仰角情報に基づいて前記第1の仰角の範囲よりも高い第2の仰角の範囲に存在する第2の衛星数をカウントし、
前記第1の衛星数と前記第2の衛星数との衛星数比を算出し、
前記衛星数比が、予め設定された第1衛星数比閾値以上でないときに屋外と判定し、
前記衛星数比が前記第1衛星数比閾値以上であるときに、前記衛星数比が、予め設定された前記第1衛星数比閾値よりも高い第2衛星数比閾値以上であるか否かを判断し、
前記衛星数比が前記第2衛星数比閾値以上であるときに屋内の非窓際と判定し、
前記衛星数比が前記第2衛星数比閾値以上でないときに屋内の窓際と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報に基づいて仰角平均値、仰角最大値及び仰角標準偏差を算出し、
前記仰角平均値が、予め設定された仰角平均値閾値以下でないときに屋外と判定し、
前記仰角最大値が、予め設定された仰角最大値閾値以下でないときに屋外と判定し、
前記仰角標準偏差が、予め設定された仰角標準偏差閾値以下でないときに屋外と判定し、
前記仰角平均値が前記仰角平均値閾値以下、前記仰角最大値が前記仰角最大値閾値以下、かつ、前記仰角標準偏差が前記仰角標準偏差閾値以下であるときに屋内と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報に基づいて仰角平均値、仰角最大値及び仰角標準偏差を算出し、
前記仰角平均値が、予め設定された仰角平均値閾値以下でないときに屋外と判定し、
前記仰角最大値が、予め設定された仰角最大値閾値以下でないときに屋外と判定し、
前記仰角標準偏差が、予め設定された第1仰角標準偏差閾値以下でないときに屋外と判定し、
前記仰角平均値が前記仰角平均値閾値以下、前記仰角最大値が前記仰角最大値閾値以下、かつ、前記仰角標準偏差が第1仰角標準偏差閾値以下であるときに、前記仰角標準偏差が、予め設定された前記第1仰角標準偏差閾値よりも低い第2仰角標準偏差閾値以下であるか否かを判断し、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下であるときに屋内の非窓際と判定し、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下でないときに屋内の窓際と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報に基づいて仰角平均値、仰角最大値及び仰角標準偏差を算出し、
前記仰角平均値が、予め設定された仰角平均値閾値以下でないときに屋外と判定し、
前記仰角最大値が、予め設定された仰角最大値閾値以下でないときに屋外と判定し、
前記仰角標準偏差が、予め設定された第1仰角標準偏差閾値以下でないときに屋外と判定し、
前記仰角平均値が前記仰角平均値閾値以下、前記仰角最大値が前記仰角最大値閾値以下、かつ、前記仰角標準偏差が第1仰角標準偏差閾値以下であるときに、前記仰角標準偏差が、予め設定された前記第1仰角標準偏差閾値よりも低い第2仰角標準偏差閾値以下であるか否かを判断し、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下でないときに屋内の窓際と判定し、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下であるときに、前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の方位角幅を算出し、
前記方位角幅が、予め設定された方位角幅閾値以下であるときに屋内の非窓際と判定し、
前記方位角幅が前記方位角幅閾値以下でないときに屋内の窓際と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報に基づいて仰角平均値、仰角最大値及び仰角標準偏差を算出し、
前記仰角平均値が、予め設定された仰角平均値閾値以下でないときに屋外と判定し、
前記仰角最大値が、予め設定された仰角最大値閾値以下でないときに屋外と判定し、
前記仰角標準偏差が、予め設定された第1仰角標準偏差閾値以下でないときに屋外と判定し、
前記仰角平均値が前記仰角平均値閾値以下、前記仰角最大値が前記仰角最大値閾値以下、かつ、前記仰角標準偏差が前記第1仰角標準偏差閾値以下であるときに、前記仰角標準偏差が、予め設定された前記第1仰角標準偏差閾値よりも低い第2仰角標準偏差閾値以下であるか否かを判断し、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下でないときに屋内の窓際と判定し、
前記仰角標準偏差が前記第2仰角標準偏差閾値以下であるときに、前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の方位角標準偏差を算出し、
前記方位角標準偏差が、予め設定された方位角標準偏差閾値以下であるときに屋内の非窓際と判定し、
前記方位角標準偏差が前記方位角標準偏差閾値以下でないときに屋内の窓際と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の仰角と方位角の合成標準偏差を算出し、
前記合成標準偏差が、予め設定された合成標準偏差閾値以下であるときに屋内と判定し、
前記合成標準偏差が前記合成標準偏差閾値以下でないときに屋外と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の仰角と方位角の合成標準偏差を算出し、
前記合成標準偏差が、予め設定された第1合成標準偏差閾値以下でないときに屋外と判定し、
前記合成標準偏差が前記第1合成標準偏差閾値以下であるときに、前記合成標準偏差が、予め設定された前記第1合成標準偏差閾値よりも低い第2合成標準偏差閾値以下であるか否かを判断し、
前記合成標準偏差が前記第2合成標準偏差閾値以下であるときに屋内の非窓際と判定し、
前記合成標準偏差が前記第2合成標準偏差閾値以下でないときに屋内の窓際と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の3D方位角面積を算出し、
前記3D方位角面積が、予め設定された3D方位角面積閾値以下であるときに屋内と判定し、
前記3D方位角面積が前記3D方位角面積閾値以下でないときに屋外と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の所定の仰角かつ特定方向の偏り度を算出し、
前記偏り度が、予め設定された偏り度閾値以下であるときに屋内と判定し、
前記偏り度が前記偏り度閾値以下でないときに屋外と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の仰角と方位角の合成標準偏差を算出し、
前記移動端末に備えられた地上高導出手段から直接的又は間接的に取得した地上高情報に基づいて、第1標準偏差閾値と、前記第1標準偏差閾値よりも低い第2標準偏差閾値と、を設定し、
前記合成標準偏差が前記第1合成標準偏差閾値以下でないときに屋外と判定し、
前記合成標準偏差が前記第1合成標準偏差閾値以下であるときに、前記合成標準偏差が、予め設定された前記第1合成標準偏差閾値よりも低い第2合成標準偏差閾値以下であるか否かを判断し、
前記合成標準偏差が前記第2合成標準偏差閾値以下であるときに屋内の非窓際と判定し、
前記合成標準偏差が前記第2合成標準偏差閾値以下でないときに屋内の窓際と判定する
請求項16記載の屋内外判定方法。 - 前記衛星仰角情報及び前記衛星方位角情報に基づいて、受信可能な電波を発信している衛星の仰角と方位角の合成標準偏差を算出し、
前記移動端末に備えられた地上高導出手段から直接的又は間接的に取得した地上高情報に基づいて、第1標準偏差閾値と、前記第1標準偏差閾値よりも低い第2標準偏差閾値と、を設定し、
前記合成標準偏差が前記第1合成標準偏差閾値以下でないときに屋外と判定し、
前記合成標準偏差が前記第1合成標準偏差閾値以下であるときに、前記合成標準偏差が、予め設定された前記第1合成標準偏差閾値よりも低い第2合成標準偏差閾値以下であるか否かを判断し、
前記合成標準偏差が前記第2合成標準偏差閾値以下であるときに、前記移動端末に備えられた移動速度導出手段から直接的又は間接的に取得した移動速度情報が、予め設定された第1移動速度閾値以上であるか否かを判断し、
前記移動速度情報が前記第1移動速度閾値以上であるときに地下鉄内と判定し、
前記移動速度情報が前記第1移動速度閾値以上でないときに屋内の非窓際と判定し、
前記合成標準偏差が前記第2合成標準偏差閾値以下であるときに、前記移動速度導出手段から直接的又は間接的に取得した移動速度情報が、予め設定された第2移動速度閾値以上であるか否かを判断し、
前記移動速度情報が前記第2移動速度閾値以上であるときに地上車両内と判定し、
前記移動速度情報が前記第2移動速度閾値以上でないときに屋内の窓際と判定する
請求項16記載の屋内外判定方法。 - 衛星信号を受信するとともに、前記衛星信号に含まれる衛星の軌道情報を用いて衛星仰角情報及び前記衛星方位角情報の少なくとも1つを算出する衛星受信機と、
前記衛星受信機から取得した前記衛星仰角情報及び前記衛星方位角情報の少なくとも1つに基づいて前記移動端末の存在が屋内か屋外かを判定する屋内外環境分類判定手段と、
を備える、
移動端末。 - 移動端末に備えられた衛星受信機から直接的又は間接的に取得した衛星仰角情報及び衛星方位角情報の少なくとも1つに基づいて前記移動端末の存在が屋内か屋外かを判定する、
屋内外環境分類判定手段。
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EP3438701A4 (en) | 2019-12-11 |
RU2707737C1 (ru) | 2019-11-29 |
US20200292716A1 (en) | 2020-09-17 |
US10948606B2 (en) | 2021-03-16 |
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