JP7100725B1 - Location estimation server, location estimation method, program, and communication terminal - Google Patents

Abstract

Kind Code: A1 A location estimation technique is provided that allows a business operator who manages at least one of a communication terminal and a location estimation server to easily correct location information and enables highly accurate location estimation. A position estimating server 3 is a position estimating server for estimating the position of a communication terminal 1, and acquires position information provided from a position information providing system based on detection information detected by the communication terminal 1. an information acquisition unit 71; a position correction determination unit 77 that determines whether correction of the position corresponding to the acquired position information is necessary based on whether or not the position is included in a predetermined range based on the reference position; and a position estimation unit 85 for estimating the position of the communication terminal 1 based on the negative determination result. [Selection drawing] Fig. 1

Description

The present invention relates to a location estimation server, a location estimation method, a program, and a communication terminal.

In the era of IoT ( Internet of Things ), the demand for a system that detects the position of a device (terminal) attached to a person or an object is increasing.

Regarding the technique related to position detection, Patent Document 1 describes a method of showing whether or not a plurality of WiFi access points have moved to a previously recorded position by using a client device that monitors WiFi access points in a target area. The location-based service system that runs is described.

The location-based service system accesses the reference database to obtain information indicating the recorded location for each observed WiFi access point in the target area. The location-based service system estimates whether the observed WiFi access point has moved from the recorded location and tells the reference database the identifier of the WiFi access point that is presumed to have moved.

Japanese Unexamined Patent Publication No. 2012-145586

However, the reference database as described in Patent Document 1 is generally managed by a specific vendor different from the business operator that manages the client device, the positioning server, and the like. Therefore, even if the above-mentioned business operator has an error in the location information provided by a specific vendor and wishes to correct the location information, it is not easy to correct the location information. As described above, since the above-mentioned business operator cannot easily correct the position information, there is a possibility that the position information cannot be acquired with high accuracy.

The position estimation server according to one aspect of the present invention is a position estimation server that estimates the position of a communication terminal, and is a position for acquiring position information provided by a position information providing system based on detection information detected by the communication terminal. An information acquisition unit, a position correction determination unit that determines the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in a predetermined range based on the reference position, and a position correction determination unit. It is provided with a position estimation unit that estimates the position of the communication terminal based on the determination result.

The position estimation method according to one aspect of the present invention is a position estimation method executed by a position estimation server that estimates the position of a communication terminal, and is provided by a position information providing system based on detection information detected by the communication terminal. A step of acquiring position information, a step of determining the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in a predetermined range based on the reference position, and a step of determining whether or not the position is necessary. It includes a step of estimating the position of the communication terminal based on the determination result.

The program according to one aspect of the present invention acquires a computer that estimates the position of a communication terminal with a position information acquisition unit that acquires position information provided by a position information providing system based on the detection information detected by the communication terminal. Communication with the position correction determination unit that determines the necessity of correction of the position based on whether or not the position corresponding to the position information is included in the predetermined range based on the reference position, and the communication based on the determination result of the necessity. It functions as a position estimation unit that estimates the position of the terminal.

The communication terminal according to one aspect of the present invention is a communication terminal that infers its own position, and is a position information acquisition unit that acquires position information provided by a position information providing system based on the detection information detected by itself. , Based on the position correction determination unit that determines the necessity of correction of the position based on whether the position corresponding to the acquired position information is included in the predetermined range based on the reference position, and the determination result of the necessity. It is equipped with a position estimation unit that estimates its own position.

The position estimation method according to one aspect of the present invention is a position estimation method executed by a communication terminal that estimates its own position, and obtains position information provided by a position information providing system based on the detection information detected by itself. In the step to be acquired, the step to determine the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in the predetermined range based on the reference position, and the determination result of necessity. Includes steps to infer your position based on.

The program according to one aspect of the present invention has acquired a terminal device that estimates its own position with a position information acquisition unit that acquires position information provided by a position information providing system based on the detection information detected by itself. A position correction determination unit that determines the necessity of correction of the position based on whether or not the position corresponding to the position information is included in the predetermined range based on the reference position, and its own based on the determination result of the necessity. It functions as a position estimation unit that estimates the position.

In the present invention, the "part" does not simply mean a physical means, but also includes a case where the function of the "part" is realized by software. Further, even if the function of one "part" or device is realized by two or more physical means or devices, the function of two or more "parts" or devices is realized by one physical means or device. May be.

It is a schematic diagram which shows an example of the whole structure of the position estimation system which concerns on 1st Embodiment of this invention. It is a block diagram which shows an example of the structure of the position guessing server which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows an example which detects the access point of the wireless LAN ( Local Area Network) in the communication terminal which concerns on 1st Embodiment of this invention. It is a schematic diagram which shows an example which detects the cell identification information of a base station in the communication terminal which concerns on 1st Embodiment of this invention. It is a flowchart which shows 1st example of the position guessing method which concerns on 1st Embodiment of this invention. It is a conceptual diagram which shows an example of the position estimation process which concerns on 1st Embodiment of this invention. It is a flowchart which shows the 2nd example of the position estimation method which concerns on 1st Embodiment of this invention. It is a flowchart which shows the 3rd example of the position estimation method which concerns on 1st Embodiment of this invention. It is a schematic diagram of the whole structure of the position estimation system which concerns on 2nd Embodiment of this invention. It is a schematic diagram of the whole structure of the position estimation system which concerns on 3rd Embodiment of this invention. It is a schematic diagram of the whole structure of the position estimation system which concerns on 4th Embodiment of this invention. It is a schematic diagram which shows an example of the hardware composition of the computer which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the invention according to the present disclosure (hereinafter, also referred to as the present invention) will be described with reference to the accompanying drawings. The following embodiments are examples for explaining the present invention, and the present invention is not intended to be limited only to the embodiments thereof. Further, the present invention can be modified in various ways as long as it does not deviate from the gist thereof. Further, in each drawing, the same components are designated by the same reference numerals as much as possible, and duplicate description will be omitted.

<First Embodiment>
[Configuration of position estimation system]
The configuration of the position estimation system according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram of the overall configuration of the position estimation system according to the first embodiment.

The position estimation system 100A is a system for estimating the position of the communication terminal 1. The position estimation system 100A includes a communication terminal 1 and a position estimation server 3. The location estimation server 3 is connected to the communication terminal 1 via a wireless line and a wired line so as to be able to communicate with a plurality of location information service providers (SP: Service Providers) 5a to 5n (location information providing system). There is. When each of the position information SP5a to 5n is not distinguished, it is called "position information SP5".

Examples of the communication terminal 1 include portable information communication devices such as IoT devices, smartphones, mobile phones, personal digital assistants (PDAs), tablet terminals, portable game machines, portable music players, wearable terminals, and notebook PCs. The communication terminal 1 may be any terminal that is required to acquire location information, and is not limited to these examples.

The communication terminal 1 has a function of generating one or more detection information DIs. The detection information DI may be a communication device capable of wirelessly communicating with the communication terminal 1 and may be information about the communication device detected by the communication terminal 1. For example, the detection information DI is at least one of the identification information of one or more access points on which the communication terminal 10 is receiving radio waves, the reception intensity of radio waves, and the identification information of the cell in which the communication terminal 10 is located. May include one. For example, the identification information of one or more access points receiving radio waves and the reception strength of radio waves may be wireless LAN information WLI. Further, for example, the identification information of the cell in which the communication terminal 10 is located may be the base station identification information BSI. Further, the detection information DI may include the information BLI of the Bluetooth (registered trademark) beacon detected by the communication terminal 1. The information BLI of the Bluetooth beacon may include, for example, a device address of a device conforming to the Bluetooth standard, a device-specific ID (device ID) included in the advertisement packet, or the like.

The wireless LAN information WLI includes identification information of one or more access points for which the communication terminal 10 is receiving radio waves (for example, BSSID : Basic Service Set Idea ), and reception strength of radio waves (for example, RSSI:). Receiving Signal Connection ) information may be included. The base station identification information BSI may include identification information (for example, CID: Cell ID) of the cell in which the communication terminal 10 is located. The information included in the detection information DI is not limited to the above example. That is, the detection information DI may include arbitrary information required for acquiring the position information of the communication terminal 1.

The communication terminal 1 has a function of transmitting detection information to the position estimation server 3. Further, the communication terminal 1 may have a function of receiving a processability response from the position estimation server 3 in response to the transmission of the detection information. The term "response" as used herein means notifying the communication terminal 1 of information indicating whether or not the position estimation server 3 can appropriately output the estimated position based on the detection information transmitted from the communication terminal 1. The communication terminal 10 may be configured to retransmit the detection information when the response indicates unprocessable. Further, if the response from the position estimation server 3 cannot be received for a certain period of time, the detection information may be transmitted again.

The communication terminal 1 may generate a plurality of detection information DIs. For example, when the communication terminal 1 detects a plurality of communication devices, the communication terminal 1 may generate detection information DI for each communication device. When the communication terminal 1 generates a plurality of detection information DIs, the communication terminal 1 may transmit the plurality of detection information DIs to the position estimation server 3, respectively. Further, the communication terminal 1 may select at least a part of the detection information DIs as the detection information DIs to be transmitted according to a predetermined priority order. For example, the communication terminal 1 can set priorities for the wireless LAN information WLI and the base station identification information BSI in advance. Then, when the communication terminal 1 generates a plurality of detection information DIs including either the wireless LAN information WLI or the base station identification information BSI, the position estimation server 3 uses the detection information DI including the high-priority information. May be sent to. The communication terminal 1 may be configured to determine the priority according to the individual situation of the detected detection information DI. In this case, the detection information DI selected based on this priority is transmitted from the communication terminal 1 to the position estimation server 3.

The location information service provider 5 is a system that outputs location information corresponding to the provided detection information DI. The location information service provider 5 is configured to return location information corresponding to, for example, the wireless LAN information WLI and the base station identification information BSI. The location estimation server 3 concludes a license agreement with the location information service provider 5 in advance. The location estimation server 3 may be configured to upload the detection information DI to the location information service provider 5. The location estimation server 3 may be configured such that the location estimation server 3 downloads the location information corresponding to the detection information DI from the location information service provider 5. The location estimation server 3 and the location information service provider 5 may transmit and receive information according to arbitrary specifications. For example, the location guessing server 3 may execute detection information DI and location information transmission / reception according to the specifications of API ( API ) provided by the location information service provider 5 or the like.

The position estimation server 3 is a device that estimates the position of the communication terminal 1. The location estimation server 3 provides the detection information DI detected by the communication terminal 1 to the location information service provider 5. The location estimation server 3 acquires the location information returned from the location information service provider 5. The position estimation server 3 can estimate the position of the communication terminal 1 based on the acquired position information. The position estimation server 3 may correct the acquired position information as necessary. The position estimation server 3 is configured by, for example, a computer equipped with a central processing unit (CPU: Central Processing Unit ) and is connected to a network.

FIG. 2 is a block diagram showing a configuration of a position estimation server according to the first embodiment. The position estimation server 3 exemplifies the information processing unit 31 that executes the position estimation process of the communication terminal 1, and the data or the result of the estimation process used when executing the position estimation process of the communication terminal 1. A recording unit 33 for recording data is provided. The information processing unit 31 functionally includes a detection information acquisition unit 71, a position information acquisition unit 73, an accuracy information acquisition unit 75, a correction determination unit 81, a position correction unit 83, a position estimation unit 85, and a position. The information SP selection unit 87 (selection unit) may be provided. Each of the above parts of the information processing unit 31 can be realized, for example, by using a storage area such as a memory or a hard disk, or by executing a program stored in the storage area by a processor.

The recording unit 33 has, for example, an RPI for information about a reference point (hereinafter, also referred to as reference point information), a detection information DI detected by the communication terminal 1, a position information PI corresponding to the detection information DI, and an accuracy regarding the position information PI. The information AI, the estimated position information EPI regarding the position estimated by the position estimation unit 85, and the position information SP information SPI regarding the position information SP5 may be recorded. The recording unit 33 may record information in which the "reference point", "Type", "range", etc. are related to each other as the reference point information RPI (see FIG. 6). Here, the reference point may be a communication point at which the provider of the position estimation server 3 can grasp and manage the installation position. For example, the reference point may be a Wi-Fi access point or a base station in which the provider of the position estimation server 3 can grasp and manage the installation position.

That is, the recording unit 33 may record, for example, the BSSID of the Wi-Fi access point and the ID (CID, PCI, etc.) assigned to the base station as the reference point information RPI. The recording unit 33 may record the reference point information RPI in association with the information of the coordinates (latitude, longitude, altitude) of the installation position of the reference point. "Type" may be a parameter indicating the type of communication characteristic at the reference point. For example, "Type" may indicate (whether it is a Wi-Fi reference point or a Cell reference point. If "Type" is Wi-Fi, it may be either a 2.4 GHz band or a 5 GHz band. "Ranger" may be a parameter indicating the communicable range of the reference point. For example, "range" indicates the maximum distance that the radio wave can theoretically reach from the reference point. Alternatively, "range" may indicate the average distance that the radio wave can reach from the reference point. The recording unit 33 has a position estimation program that describes the position estimation content executed by the position estimation server 3. It may be installed.

The detection information acquisition unit 71 receives (acquires) the detection information DI generated by the communication terminal 1 from the communication terminal 1. Further, the detection information acquisition unit 71 transmits the detection information DI to the position information SP5.

FIG. 3 is a schematic diagram showing an example of detecting a wireless LAN access point in the communication terminal 1 according to the first embodiment of the present invention. When a plurality of access point APs (Access Points ) are present in the area of the wireless LAN, the communication terminal 10 detects the access point identification information (BSSID) and its electric field strength (RSSI). The communication terminal 1 includes an active scan function 16 and a passive scan function 17 as access point detection functions. The active scan is a scanning method in which identification information and information on electric field strength (hereinafter, also referred to as electric field strength information) are obtained by requesting oneself. Passive scanning is a scanning method in which identification information and electric field strength information are obtained only from received information.

As a scan result, the communication terminal 1 can obtain identification information and electric field strength information of each access point existing in the service area. That is, the communication terminal 1 can generate the detection information DI including the identification information and the electric field strength information of each access point existing in the service area. The communication terminal 1 may transmit all of the generated detection information DI to the position information SP5. Further, the communication terminal 1 may transmit the detection information DI from the generated detection information DI of the access point having the larger electric field strength to the predetermined limit number to the position information SP5.

FIG. 4 is a schematic diagram showing an example of detecting cell identification information (CID) of a base station in the communication terminal according to the first embodiment of the present invention. The communication terminal 1 detects the identification information of the base station in the service area. The identification information of the base station (MC) is, for example, a country code (MCC: Mobile Network Code ) , a network code ( MNC : Mobile Network Code ) , and an area code ( LAC : Location Area C ) . ode / TAC : Trading Area Code) or the like. The communication terminal 1 can obtain the identification information of the base station in the service area as the scan result. That is, the communication terminal 1 can generate the detection information DI including the identification information of the base station in the service area. The communication terminal 1 may transmit the detection information DI including the identification information to the position information SP5.

The position information acquisition unit 73 acquires the position information corresponding to the detection information DI returned from the position information SP5.

The accuracy information acquisition unit 75 acquires accuracy information indicating the accuracy of the position information. For example, the accuracy information acquisition unit 75 transmits a request for accuracy information to the position information SP5. The position information SP5 generates and returns the accuracy information in response to the request for the accuracy information from the accuracy information acquisition unit 75. When the above-mentioned position information acquisition unit 73 acquires a plurality of position information, it may refer to the accuracy information acquired from the position information SP5 and give priority to the more accurate position information. That is, the position estimation server 3 may infer the position of the communication terminal 1 based on the more accurate position information by referring to the accuracy information.

The correction determination unit 81 needs to correct the position based on whether or not the position corresponding to the position information acquired by the position information acquisition unit 73 is included in the communicable range (predetermined range) based on the reference point. To judge. The "communicable range" corresponds to, for example, the "range" included in the reference point information RPI. The "range" may be appropriately set according to at least one of the type of reference point (whether or not it is an access point or a base station, etc.) and the characteristics of the reference point (performance of an access point or a base station, etc.).

The position correction unit 83 corrects the position corresponding to the position information provided by the position information SP5 based on the determination result of the correction determination unit 81. For example, when the position corresponding to the position information acquired by the position information acquisition unit 73 is not included in the communicable range based on the reference point, the position correction unit 83 sets the position corresponding to the position information as the estimated position. Instead, the position corresponding to the reference point is corrected as the estimated position of the communication terminal 1.

The position estimation unit 85 estimates the position of the communication terminal 1. When the position corresponding to the position information acquired by the position information acquisition unit 73 is included in the communicable range based on the reference point, the position estimation unit 85 estimates the position corresponding to the reference point as the position of the communication terminal 1. .. On the other hand, when the position corresponding to the position information acquired by the position information acquisition unit 73 is not included in the communicable range based on the reference point, the position estimation unit 85 sets the reference point corrected by the position correction unit 83. The corresponding position is estimated as the position of the communication terminal 1.

When a plurality of reference points exist, the position estimation unit 85 estimates the position corresponding to one of the plurality of reference points as the position of the communication terminal 1 according to a predetermined priority. Further, the position estimation unit 85 outputs the estimated position of the communication terminal 1. For example, the position estimation unit 85 transmits (outputs) the estimated position to the communication terminal 1. Further, the position estimation unit 85 may display (output) the estimated position on a display unit (viewer or the like) provided in the position estimation server 3.

The position information SP selection unit 87 selects a specific position information SP5 from a plurality of position information SPs 5a to 5n. For example, when the position corresponding to the position information acquired from one position information SP5 among the plurality of position information SP5a to 5n is not included in the communicable range based on the reference point, the position information SP selection unit 87 is newly added. Select another position information SP5 for acquiring various position information. Further, the position information SP selection unit 87 is for acquiring new position information based on the accuracy information associated with the position information acquired from one position information SP5 among the plurality of position information SPs 5a to 5n. Select the position information SP5 of.

The position estimation server 3 may execute a process of adding a new reference point. That is, the position estimation server 3 may have the recording unit 33 record a new reference point information RPI. In this case, the position estimation server 3 may further include a reference point determination unit 77 and a reference point registration unit 79 (registration unit).

The reference point determination unit 77 determines whether or not the position corresponding to the detection information DI acquired by the detection information acquisition unit 71 and the reference point (reference position) match. For example, the reference point determination unit 77 may determine whether or not the position corresponding to the detection information DI acquired by the detection information acquisition unit 71 is included in the reference point information RPI recorded in the recording unit 33.

When the position corresponding to the detection information acquired by the detection information acquisition unit 71 and the reference point do not match, the reference point registration unit 79 registers the position as a new reference point (reference position). For example, if the position corresponding to the detection information acquired by the detection information acquisition unit 71 is not included in the reference point information RPI recorded in the recording unit 33, the reference point registration unit 79 newly adds the detection information. It may be registered as a reference point. The reference point registration unit 79 can change the newly registered reference point according to, for example, an instruction from the business operator that manages the position estimation server 3. According to this configuration, if the newly registered reference point is an inaccurate position, it can be changed to the exact position desired by the business operator. In the above case, the reference point newly registered by the reference point registration unit 79 is only a temporary reference point, that is, a reference point candidate. Therefore, after the newly registered reference point is changed to an accurate position, the newly registered reference point is not treated as detection information.

[Operation of position estimation system]
(1st example)
With reference to FIGS. 1 and 5, the operation of the position estimation system 100A according to the first embodiment will be described, and the first example of the position estimation method according to the present embodiment will be described. FIG. 5 is a flowchart showing a first example of the position estimation method according to the first embodiment of the present invention. Each step S1 ... S33 shown in FIG. 1 corresponds to each step S1 ... S33 shown in FIG.

The communication terminal 1 generates one or more detection information DIs (S1). Specifically, the communication terminal 1 has identification information of one or a plurality of access points for which the communication terminal 10 is receiving radio waves, reception strength of radio waves, and identification information of cells in which the communication terminal 10 is located. A detection information DI containing at least one of the information is generated. The communication terminal 1 transmits the detection information DI to the position estimation server 3 (S3).

As a premise, the position estimation server 3 registers the reference point information RPI in the recording unit 33 (S11). The position estimation server 3 transmits the detection information DI received from the communication terminal 1 to the position information SP5, and requests the position information SP5 to provide the accuracy information AI regarding the position information PI (S13).

The position information SP5 transmits the position information PI corresponding to the detection information DI received from the position estimation server 3 and the accuracy information AI related to the position information PI to the position estimation server 3 (S31).

The position estimation server 3 determines whether or not the position corresponding to the position information PI acquired from the position information SP5 is included in the communicable range based on the reference point (S19). If the position corresponding to the position information PI acquired from the position information SP5 is included in the communicable range based on the reference point (in the case of Yes), the process proceeds to step S25.

If the position corresponding to the position information PI acquired from the position information SP5 is not included in the communicable range based on the reference point (in the case of No), the process proceeds to step S21.

In step S21, the position estimation server 3 estimates the position corresponding to the reference point as the position of the communication terminal 1. Here, when the reference point information RPI contains information about a plurality of reference points, the position estimation process when the position corresponding to the plurality of detection information coincides with the plurality of reference points is referred to with reference to FIG. I will explain.

FIG. 6 is a conceptual diagram showing an example of the position estimation process according to the first embodiment of the present invention. Reference point information When the RPI contains information about a plurality of reference points, the positions corresponding to the plurality of detection information are a plurality of reference points (Wi-Fi reference point "32: 61: 3C: 4E: B6: 05". And Cell reference point “20541697”), the position estimation server 3 executes position estimation based on various conditions. The number of a plurality of reference points is arbitrary.

For example, the position estimation server 3 has a Wi-Fi reference point "32:61: 3C: 4E: B6: 05", a Cell reference point "20541697" and a Bluetooth reference point "AA: BB: CC: DD: EE: FF". When the communication terminal 1 is located at a position P within each communicable range (“range”), the position corresponding to a specific reference point satisfying a predetermined condition among the plurality of reference points is the position of the communication terminal 1. Guess as a position. Appropriate specific reference points may be determined by combining a plurality of predetermined conditions described below.

In such a case, the position estimation server 3 may estimate the position corresponding to the specific reference point among the plurality of reference points as the position of the communication terminal 1 according to a predetermined priority. The recording unit 33 may further record the reference point information RPI in association with "priority" (see FIG. 6). "Prority" may be a parameter indicating the priority when the reference point estimated as the position of the communication terminal 1 is selected from the plurality of reference points.

For example, the position estimation server 3 may estimate the position corresponding to a specific reference point among the plurality of reference points as the position of the communication terminal 1 according to the priority order shown in (1)-(5) below. .. The priorities (1)-(5) shown below are merely examples. In the following, "Priority" is the highest priority criterion, but other criteria such as "Ranger" and "Type" may be given priority over "Priority". It should be noted that the plurality of criteria shown in FIG. 6 is merely an example, and may not include at least a part of the criteria, or may further include a new criterion (for example, “Altitude” (altitude)).

(1) A specific reference point is adopted based on "Priority".
(2) When there are a plurality of reference points having the same value for "Priority", a specific reference point is adopted based on "Ranger".
(3) If there are multiple reference points with the same value for "Ranger", a specific reference point is adopted based on "Type".
(4) When there are a plurality of reference points having the same (or the same type) “Type”, a specific reference point is adopted based on the “Indo or” flag.
(5) When there are a plurality of reference points having the same "Indoor", a specific reference point is adopted based on "Subtype".

Regarding (1) above, for example, the position estimation server 3 has the highest priority based on the "priority" of the reference point information RPI (for example, 5 to 1 are assigned in order from the highest priority). The position corresponding to the Bluetooth reference point "AA: BB: CC: DD: EE: FF" which is "5" may be estimated as the position of the communication terminal 1.

Regarding (2) above, when there are a plurality of reference points having the same value of "Priority", the position estimation server 3 responds to the width of the communicable range ("range") based on each of the plurality of reference points. A specific reference position may be determined. According to this configuration, for example, it is possible to appropriately determine a specific reference point having a narrower communicable range, that is, which is likely to be close to the coordinates where the communication terminal 1 is actually located.

With respect to the above (3), when there are a plurality of reference points having the same value for "Ranger", a specific reference point may be determined based on "Type" (Bluetooth> Wi-Fi access point> Cell). For example, the reference point corresponding to Bluetooth may be adopted in preference to the reference point for the Wi-Fi access point or Cell. The reference point corresponding to the Wi-Fi access point may be adopted in preference to the reference point for the Cell.

Regarding (4) above, when there are a plurality of reference points having the same (or the same type of) “Type”, the position estimation server 3 has an “Indoor” flag (whether the plurality of reference points are indoors or outdoors). ) May determine a specific reference point. The recording unit 33 may further record the reference point information RPI in association with the “Window” (see FIG. 6). "Window" may be a parameter indicating whether the reference point is located indoors or outdoors. For example, the position estimation server 3 refers to the "Window" of the "reference point information RPI", and has a plurality of reference points indoors ("Indoor" is "1") or outdoors ("Indoor" is "0"). ) May be determined. Radio waves are less likely to leak outdoors (outside obstacles), and reference points installed indoors may be preferentially adopted.

Regarding (5) above, when there are a plurality of reference points having the same "Window", the position estimation server 3 may determine a specific reference point based on "Subtype". For example, of the reference point of the Wi-Fi access point of 5 GHz and the reference point of the Wi-Fi access point of 2.4 GHz, the reference point of the Wi-Fi access point of 5 GHz may be prioritized.

The position estimation server 3 may determine a specific reference point according to the distance between each of the plurality of reference points. For example, the position estimation server 3 may set a reference point closer to the center of the intersection (range) of the virtual straight line connecting each of the plurality of reference points as the specific reference point among the plurality of reference points. Further, the position estimation server 3 may use the center point itself of the intersection (range) of the virtual straight line connecting each of the plurality of reference points as a specific reference point.

As described above, since the position estimation server 3 can determine a specific reference point based on a predetermined priority, the specific reference point can be easily specified.

For example, when a business operator attaches a Wi-Fi access point to the ceiling of a station platform with a jig, the possibility that the Wi-Fi access point will move is extremely low. On the other hand, when the Wi-Fi access point is installed at the store's cash register, the Wi-Fi access point once installed is inside the store for the convenience of the store before the business operator can grasp the fact. There is a high possibility that you will be moved to a place different from the cash register in, or to another store. Against this background, the Wi-Fi access point once installed is given a priority according to the "reliability" depending on the possibility that it will be moved outside the control of the operator. Therefore, if the coordinates of the access point with high reliability are adopted, it is possible to avoid adopting the coordinates of the access point with lower reliability. That is, according to one embodiment of the present invention, the accuracy of positioning can be improved.

On the other hand, when the installation target is Cell, the operator manages the installation status in principle, so it is unlikely that the operator will be moved outside the control of the operator. Further, the radius of radio wave arrival of the Cell differs depending on the type of the Cell such as a pico cell and a macro cell. From the above background, it is possible to get closer to the actual position by setting the Priority of the Cell having a smaller radius of radio wave arrival to be higher. In general, Cell has a larger radio wave arrival radius than Wi-Fi access points, so if the Priority is shown in descending order, for example, Wi-Fi access points with high reliability and Wi with low reliability. -It is assumed that the order is Fi access point, Cell with a small radio wave arrival radius, and Cell with a large radio wave arrival radius. In addition, the business operator, etc. further subdivides the Priority according to the actual installation location (inside and outside of the building) and installation status of the Wi-Fi access point and Cell, or the actual measurement survey of the arrival of radio waves, and Wi-Fi access. It is also possible to set each of the point and Cell.

Further, for example, the position estimation server 3 may adopt the Bluetooth reference point as a specific reference point with the highest priority. That is, the position estimation server 3 may infer the position corresponding to the Bluetooth reference point as the position of the communication terminal 1 by giving priority to the other reference points among the plurality of reference points. For example, in the position estimation server 3, the detection information DI includes the information BLI of the Bluetooth beacon detected by the communication terminal 1, and the reference point information RPI indicated by the recording unit 33 shown in FIG. 2 includes the specific Bluetooth beacon. When the device ID or the like of is registered, a specific Bluetooth reference point may be adopted without inquiring the position information PI to the position information SP5. That is, in the above case, the position estimation server 3 may preferentially adopt the information from the Bluetooth beacon over the position information PI provided from the position information SP5.

Further, the position estimation server 3 may adopt a specific reference point according to the value of the specific reference without inquiring the position information SP 5 for the position information PI. For example, when the value of "Priority" is the highest value (for example, "5") among the plurality of reference points in the reference point information RPI shown in FIG. 6, the position estimation server 3 inquires about the position information PI to the position information SP5. In the reference point information RPI, the coordinates corresponding to the specific reference point whose “Priority” value is “5” may be adopted without performing the above. Positioning accuracy is usually set by giving priority to the coordinates of the reference point of the Bluetooth beacon or Wi-Fi access point in the store (indoor), which is easy to set the highest value as the value of "Priority", over the coordinates of other reference points. It is effective when the above is improved.

As another example, when the value of "range" is the minimum value (for example, "10 m") among the plurality of reference points in the reference point information RPI shown in FIG. 6, the position estimation server 3 sends the position information to the position information SP5. Coordinates corresponding to a specific reference point (for example, Bluetooth reference point in the example of FIG. 6) in which the value of “range” is “10 m” in the reference point information RPI may be adopted without inquiring about the PI. ..

Further, when the value of a specific reference (for example, "range") at a specific reference point is within a threshold value (for example, "10 m"), the position estimation server 3 inquires about the position information PI to the position information SP5. The specific reference point may be adopted without doing so. On the other hand, when the value of a specific reference (for example, "range") at a specific reference point is larger than the threshold value (for example, "10 m"), the position estimation server 3 sends the position information PI to the position information SP5. Make an inquiry.

In step S21 in FIG. 5, the position estimation server 3 does not use the coordinates (positions) corresponding to the acquired position information PI as the estimation position, but specifies (corrects) the position corresponding to the reference point as the estimation position of the communication terminal 1. )do. The position estimation server 3 may delete the acquired position information PI that has not been adopted from the recording unit 33.

The position estimation server 3 outputs the estimated position to the communication terminal 1 (S27). When the communication terminal 1 acquires the information regarding the estimated position from the position estimation server 3, it records it in the recording unit of the communication terminal 1 (S5).

As described above, the position estimation system 100A in the first embodiment acquires the position information provided from the position information SP5 based on the detection information detected by the communication terminal 1, and the position corresponding to the acquired position information is located. The necessity of correction of the position is determined based on whether or not it is included in the predetermined range based on the reference position, and the position of the communication terminal 1 is estimated based on the determination result of the necessity. For example, in the first example of the position estimation method according to the first embodiment, when it is determined that the position estimation system 100A needs to correct the position corresponding to the acquired position information, the position estimation server 3 and the communication terminal are used. The business operator who manages at least one of 1 can easily correct the location information. That is, in general, the business operator can proactively correct the location information, such as an error in the location information provided by the location information SP5 managed by a specific vendor different from the business operator. Is. Therefore, the business operator who manages at least one of the position estimation server 3 and the communication terminal 1 can easily correct the position information and enables highly accurate position estimation.

Further, in the position estimation system 100A, the position estimation server 3 may log various information or data regarding the position estimation process of the communication terminal 1. In this case, the position estimation system 100A according to the embodiment can reproduce the occurrence situation of the positioning failure in order to investigate the cause of the positioning failure.

[Operation of position estimation system]
(2nd example)
A second example of the position estimation method according to the first embodiment will be described with reference to FIGS. 1 and 7. FIG. 7 is a flowchart showing a second example of the position estimation method according to the first embodiment. The steps S1 ... S31 shown in FIG. 1 and the steps S1 ... S33 shown in FIG. 7 are the same for the processes corresponding to the same reference numerals. The second example is different from the first example in that the determination process for determining whether or not the detection information DI received from the communication terminal 1 includes the reference point is executed, and the determination process is not executed. In the following, the points different from the first example will be particularly described.

The position estimation server 3 determines whether or not the detection information DI received from the communication terminal 1 includes a reference point (S15). If the detection information DI received from the communication terminal 1 includes a reference point (in the case of Yes), the process proceeds to step S19. On the other hand, if the detection information DI received from the communication terminal 1 does not include the reference point (No), the process proceeds to step S17, and the position estimation server 3 uses the detection information DI as a new reference point. It is registered in the recording unit 33 shown in FIG. That is, the reference point information RPI recorded in the recording unit 33 is updated.

As described above, according to the second example, the position estimation system 100A in the first embodiment determines whether or not the detection information DI received from the communication terminal 1 includes the reference point. For example, when the detection information DI received from the communication terminal 1 does not include the reference point, the position estimation server 3 registers the detection information DI as a new reference point. According to this configuration, the above-mentioned temporary reference point (reference point candidate) can be automatically registered.

[Operation of position estimation system]
(3rd example)
A third example of the position estimation method according to the first embodiment will be described with reference to FIGS. 1 and 8. FIG. 8 is a flowchart showing a third example of the position estimation method according to the first embodiment of the present invention. The steps S1 ... S31 shown in FIG. 1 and the steps S1 ... S33 shown in FIG. 8 are the same for the processes corresponding to the same reference numerals. In the third example, when the position corresponding to the position information acquired from one position information SP5 is not included in the predetermined range based on the reference point, another position information SP5 for acquiring new position information is selected. In terms of points, it is different from the first example in which the position corresponding to the reference point is estimated as the position of the communication terminal 1. In the following, the points different from the first example will be particularly described.

In step S19, if the position corresponding to the position information acquired from one position information SP5a among the plurality of position information SP5a to 5n is not included in the communicable range based on the reference point, the process proceeds to step S20. The position estimation server 3 determines whether or not the inquiry to all the other candidate position information SPs 5b to 5n has been completed (S20). In S20, if No, another position information SP5n for acquiring new position information is selected (S22). The position estimation server 3 transmits the detection information DI received from the communication terminal 1 to the selected position information SP5n, and transmits a request for providing the accuracy information AI regarding the position information PI (S23). When the position information SP5n receives the detection information DI and the request for providing the accuracy information AI from the position estimation server 3, the position information PI and the accuracy information AI are returned to the position estimation server 3 (S33). The position estimation server 3 can repeatedly execute the selection process of the series of position information SP5 as described above (change the position information SP5 in order) until the position information with higher accuracy can be acquired. On the other hand, in step S20, in the case of Yes, the position estimation server 3 estimates the position corresponding to the reference point as the position of the communication terminal 1 (S21).

Regarding the selection process of the position information SP5, the position estimation server 3 has a new position information based on the accuracy information AI associated with the position information DI acquired from one position information SP5 among the plurality of position information SP5a to 5n. Other position information SP5 for acquiring PI may be selected. According to this configuration, for example, when the position information with low accuracy is provided from the position information SP5, the position estimation server 3 obtains new position information with high accuracy from the other position information SP5. , Other location information SP5 can be selected.

According to the third example of the position estimation method according to the first embodiment, in the position estimation system 100A, the position corresponding to the position information acquired from one position information SP5 among the plurality of position information SP5a to 5n is the reference point. If it is not included in the communicable range based on, another location information SP5 for acquiring new location information is selected. The position estimation system 100A acquires new position information every time the change (selection) process of the position information SP5 is repeated as needed. When the coordinates corresponding to the new position information are included in the communicable range from the reference point, the position estimation system 100A specifies the coordinates as the estimation position. Therefore, the business operator who manages at least one of the position estimation server 3 and the communication terminal 1 can easily correct the position information and enables highly accurate position estimation.

<Second Embodiment>
The position estimation system 100B according to the second embodiment of the present invention will be described with reference to FIG. FIG. 9 is a schematic diagram of the overall configuration of the position estimation system 100B according to the second embodiment of the present invention. In the position estimation system 100B according to the second embodiment, the position estimation server 3 and the position information SP5 can communicate with each other (cooperate) in that the position estimation server 3 and the position information SP5 cannot communicate (do not cooperate). ) Different from the position estimation system 100A according to the first embodiment. Hereinafter, the points different from the first embodiment will be particularly described. It should be noted that the steps S1 ... S33 shown in FIGS. 1, 5, 7 and 8 and the steps S1 ... S33 shown in FIG. 9 are the same for the processes corresponding to the same reference numerals.

As described above, in the position estimation system 100B, since the position estimation server 3 and the position information SP5 are not communicable (do not cooperate), the transmission of detection information, the request for accuracy information, and the reception of position information from the position information SP5 are performed. Is executed by the communication terminal 1 (S13, 23, 31, and 33). Further, the communication terminal 1 transmits the detection information detected by itself and the position information acquired from the position information SP5 to the position estimation server 3 (S4). As described above, the position estimation server 3 executes the position estimation process including the position correction process.

According to the second embodiment, even when the position estimation server 3 and the position information SP5 are not communicable (do not cooperate), the position estimation system 100B is the same as the position estimation system 100A according to the first embodiment. In addition, the business operator who manages at least one of the position estimation server 3 and the communication terminal 1 can easily correct the position information and enables highly accurate position estimation.

<Third Embodiment>
The position estimation system 100C according to the third embodiment of the present invention will be described with reference to FIG. FIG. 10 is a schematic diagram of the overall configuration of the position estimation system 100C according to the third embodiment of the present invention. In the position estimation system 100C according to the third embodiment, the position estimation process including the position correction process is executed by the position estimation server 3 in that the position estimation process including the position correction process is executed by the communication terminal 1. It is different from the position estimation system 100A according to the second embodiment and the position estimation system 100B according to the second embodiment. It should be noted that the steps S1 ... S33 shown in FIGS. 1, 5, 7 and 8 and the steps S1 ... S33 shown in FIG. 10 are the same for the processes corresponding to the same reference numerals. .. Hereinafter, the differences from the first embodiment and the second embodiment will be particularly described.

The position estimation system 100C does not include the position estimation server 3. In the position estimation system 100C, detection information and position information are transmitted and received between the communication terminal 1 and the position information SP5, and the communication terminal 1 executes a position estimation process including a position correction process. In the position estimation system 100C, since the communication terminal 1 executes the position estimation process, the communication terminal 1 has a recording unit 33 shown in FIG. 2, which records information and processing results necessary for executing the position estimation process. Prepare for. However, depending on the storage size of the recording unit 33, a device or the like different from the communication terminal 1 may include the recording unit 33.

According to the third embodiment, in the position estimation system 100C not provided with the position estimation server 3, the communication terminal 1 executes the position estimation process including the position correction process. Therefore, even if the position estimation system 100C does not include the position estimation server 3, the operator who manages the communication terminal 1 can easily correct the position information and can perform highly accurate position estimation. do.

<Fourth Embodiment>
The position estimation system 100D according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 11 is a schematic diagram of the overall configuration of the position estimation system 100D according to the fourth embodiment of the present invention. In the position estimation system 100D according to the fourth embodiment, the communication terminal 1 executes the position estimation process including the position correction process as in the position estimation system 100C according to the third embodiment. Further, in the position estimation system 100D according to the fourth embodiment, the position estimation server 3 and the position information SP5 cannot communicate with each other (do not cooperate with each other). It should be noted that the steps S1 ... S33 shown in FIGS. 1, 5, 7 and 8 and the steps S1 ... S33 shown in FIG. 11 are the same for the processes corresponding to the same reference numerals. .. Hereinafter, the differences from the first embodiment to the third embodiment will be particularly described.

In the position estimation system 100D, since the position estimation server 3 and the position information SP5 are not communicable (do not cooperate), the communication terminal is used for transmitting detection information, requesting accuracy information, and receiving position information from the position information SP5. 1 executes (S13, 23, 31, and 33). Further, since the communication terminal 1 itself executes the position estimation process including the position correction process, the communication terminal 1 acquires the reference point information from the position estimation server 3. For example, as shown in FIG. 11, the communication terminal 1 acquires reference point information from the position estimation server 3 (S29) triggered by transmitting the detection information to the position estimation server 3 (S3). If the position estimation server 3 does not have the reference point information corresponding to the detection information, the position estimation server 3 may return the information indicating that fact to the communication terminal 1.

According to the fourth embodiment, in the position estimation system 100D, the communication terminal 1 executes the position estimation process including the position correction process. In the position estimation system 100D, even when the position estimation server 3 and the position information SP5 are not communicable (do not cooperate), the operator who manages at least one of the position estimation server 3 and the communication terminal 1 can easily position. Information can be corrected and position estimation with high accuracy is possible.

FIG. 12 is a diagram showing an example of the hardware configuration of the computer according to the embodiment. With reference to FIG. 12, it can be used to configure various devices in the position estimation systems 100A, 100B, 100C and 100D shown in FIGS. 1 and 9-11, for example, a communication terminal 1 and a position estimation server 3. An example of the hardware configuration of the computer will be described.

The computer 40 mainly includes a processor 41, a main recording device 42, an auxiliary recording device 43, an input / output interface 44, and a communication interface 45 as hardware resources, which are an address bus and a data bus. , And are connected to each other via a bus line 46 including a control bus and the like. An interface circuit (not shown) may be appropriately interposed between the bus line 46 and each hardware resource.

The processor 41 controls the entire computer. The processor 41 corresponds to, for example, the information processing unit 31 of the position estimation server 3 shown in FIG. The main recording device 42 provides a work area for the processor 41, and is a volatile memory such as a SRAM ( Static Random Access Memory) or a DRAM ( Dynamic Random Access Memory). The auxiliary recording device 43 is a non-volatile memory such as an HDD, SSD, or flash memory that stores software programs and the like and data. The program, data, or the like is loaded from the auxiliary recording device 43 to the main recording device 42 via the bus line 46 at an arbitrary time. The auxiliary recording device 43 corresponds to, for example, the recording unit 33 of the position estimation server 3 shown in FIG.

The input / output interface 44 performs one or both of presenting information and receiving input of information, and is a camera, keyboard, mouse, display, touch panel display, microphone, speaker, and the like. The communication interface 45 is for transmitting and receiving various data between various devices in the position estimation systems 100A, 100B, 100C and 100D shown in FIGS. 1 and 9-11 via a predetermined communication network. The communication interface 45 and the predetermined communication network may be connected by wire or wirelessly. The communication interface 45 may also acquire information related to the network, for example, information related to a Wi-Fi access point, information related to a base station of a communication carrier, and the like.

It will be apparent to those skilled in the art that the collaboration of the hardware resources and software exemplified above allows the computer 40 to function as the desired means, perform the desired steps, and achieve the desired functionality. ..

It should be noted that each of the above embodiments is for facilitating the understanding of the present invention, and does not limit the interpretation of the present invention. The present invention can be modified / improved without departing from the spirit thereof, and the present invention also includes an equivalent thereof. In addition, the present invention can form various disclosures by appropriately combining the plurality of components disclosed in each of the above embodiments. For example, some components may be removed from all the components shown in the embodiments. Further, the components may be appropriately combined in different embodiments.

The detection information in each of the above embodiments includes identification information of one or a plurality of access points for which the communication terminal 1 shown in FIG. 1 or the like is receiving radio waves, the reception strength of the radio waves, and the communication terminal 1. It includes, but is not limited to, at least one of the identification information of the cell and the information of the Bluetooth beacon detected by the communication terminal 1. For example, the detection information may include geomagnetic information that identifies the geomagnetism detected by the communication terminal 1. In the following, as an example, a form in which the detection information includes geomagnetic information will be described.

The communication terminal 1 acquires the geomagnetic information in which the communication terminal 1 is currently located. The geomagnetic information is obtained as direction information of the X-axis, the Y-axis, and the Z-axis. The position of geomagnetic information is difficult to determine by itself. Therefore, the position accuracy can be improved by referring together with the identification information and the electric field strength information of the access point of the wireless LAN and the identification information of the base station in the area. That is, when the communication terminal 1 knows that the communication terminal 1 itself is in a specific indoor or area based on the estimated position from the position estimation server 3, only the geomagnetic information is used by the position estimation server 3 or the position estimation server 3. Even if it is transmitted to the position information SP5, highly accurate position estimation is possible. Even if the geomagnetic information is only directional information, it is possible to narrow down the position to only a specific point in a specific indoor or area.

According to the above configuration, for example, the communication terminal 1 transmits the detected geomagnetic information to the position estimation server 3. The position estimation server 3 transmits the acquired geomagnetic information to the position information SP5. The position information SP5 transmits the position information to the position estimation server 3 in response to the geomagnetic information. Therefore, the position estimation server 3 can estimate the position of the communication terminal 1 based on the acquired position information.

1 ... Communication terminal, 3 ... Location estimation server, 5a ... 5n ... Location information service provider (SP), 16 ... Active scan function, 17 ... Passive scan function, 31 ... Information processing unit, 33 ... Recording unit, 71 ... Detection information acquisition unit, 73 ... Position information acquisition unit, 75 ... Accuracy information acquisition unit, 77 ... Reference point determination unit, 79 ... Reference point registration unit, 81 ... Correction determination unit, 83 ... Position correction unit, 85 ... Position estimation unit , 87 ... Position information SP selection unit, 100A, 100B, 100C, 100D ... Position estimation system

Claims (12)

It is a position estimation server that estimates the position of the communication terminal.
A location information acquisition unit that acquires location information provided by the location information providing system based on the detection information detected by the communication terminal, and a location information acquisition unit.
A position correction determination unit that determines the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in the predetermined range based on the reference position.
It is provided with a position estimation unit that estimates the position of the communication terminal based on the determination result of necessity.
When the position corresponding to the acquired position information is included in the predetermined range based on each of the plurality of reference positions, the position estimation unit satisfies the condition based on the predetermined priority among the plurality of reference positions. The position corresponding to the specific reference position determined to be the position of the communication terminal is estimated as the position of the communication terminal.
Location guessing server. When the position corresponding to the acquired position information is not included in the predetermined range based on the reference position, the position estimation unit estimates the position corresponding to the reference position as the position of the communication terminal.
The location estimation server according to claim 1. The specific reference position satisfying the above conditions is
A reference position determined based on a predetermined priority,
A reference position determined according to the breadth of the communicable range based on each of the plurality of reference positions.
A reference position determined according to the distance of each of the plurality of reference positions,
A reference position determined according to the type of communication characteristics at the plurality of reference positions, or
Including reference positions determined depending on whether the plurality of reference positions are indoors or outdoors.
The location estimation server according to claim 1 or 2 . The location information providing system includes a plurality of location information providing systems, and includes a plurality of location information providing systems.
When the position corresponding to the position information acquired from one position information providing system is not included in the predetermined range based on the reference position among the plurality of position information providing systems, a new position information is acquired. Further provided with a selection unit for selecting another location information providing system,
The location estimation server according to any one of claims 1 to 3 . The location information providing system includes a plurality of location information providing systems, and includes a plurality of location information providing systems.
An accuracy information acquisition unit that acquires accuracy information related to the location information from the location information providing system, and
When the position corresponding to the acquired position information is not included in the predetermined range based on the reference position, it is associated with the position information acquired from one of the plurality of position information providing systems. A selection unit for selecting another position information providing system for acquiring new position information based on the accuracy information is further provided.
The location estimation server according to any one of claims 1 to 4 . A detection information acquisition unit that acquires detection information detected by the communication terminal,
When the position corresponding to the acquired detection information and the reference position do not match, a registration unit for registering the position as a new reference position is further provided.
The location estimation server according to any one of claims 1 to 5 . The detection information is
Regarding the identification information of one or more access points for which the communication terminal is receiving radio waves, the reception strength of the radio waves, the identification information of the cell in which the communication terminal is located, and the geomagnetism detected by the communication terminal. Geomagnetic information and at least one of the beacon information detected by the communication terminal.
The location estimation server according to any one of claims 1 to 6 . This is a position estimation method executed by a position estimation server that estimates the position of a communication terminal.
A step of acquiring the location information provided by the location information providing system based on the detection information detected by the communication terminal, and
A step of determining the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in the predetermined range based on the reference position, and
Including a step of estimating the position of the communication terminal based on the determination result of necessity.
The guessing step satisfies a condition based on a predetermined priority among a plurality of reference positions when the position corresponding to the acquired position information is included in a predetermined range based on each of the plurality of reference positions. The position corresponding to the specific reference position determined to be the position of the communication terminal is estimated as the position of the communication terminal.
Position estimation method. A computer that guesses the position of the communication terminal,
A location information acquisition unit that acquires location information provided by the location information providing system based on the detection information detected by the communication terminal, and a location information acquisition unit.
A position correction determination unit that determines the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in the predetermined range based on the reference position.
A position estimation unit that estimates the position of the communication terminal based on the necessity determination result, and a position estimation unit.
To function as
When the position corresponding to the acquired position information is included in the predetermined range based on each of the plurality of reference positions, the position estimation unit satisfies the condition based on the predetermined priority among the plurality of reference positions. A program that estimates a position corresponding to a specific reference position determined as the position of the communication terminal . It is a communication terminal that guesses its own position,
A location information acquisition unit that acquires location information provided by the location information providing system based on the detection information detected by itself, and a location information acquisition unit.
A position correction determination unit that determines the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in the predetermined range based on the reference position.
It is equipped with a position estimation unit that estimates its own position based on the determination result of necessity.
When the position corresponding to the acquired position information is included in the predetermined range based on each of the plurality of reference positions, the position estimation unit satisfies the condition based on the predetermined priority among the plurality of reference positions. The position corresponding to the specific reference position determined to be the position of the communication terminal is estimated as the position of the communication terminal.
Communication terminal. It is a position estimation method executed by a communication terminal that estimates its own position.
The step of acquiring the location information provided by the location information providing system based on the detection information detected by itself, and
A step of determining the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in the predetermined range based on the reference position, and
Including the step of estimating one's own position based on the determination result of necessity, and the like.
The guessing step satisfies a condition based on a predetermined priority among a plurality of reference positions when the position corresponding to the acquired position information is included in a predetermined range based on each of the plurality of reference positions. The position corresponding to the specific reference position determined to be the position of the communication terminal is estimated as the position of the communication terminal.
Position estimation method. A communication terminal that guesses its position,
A location information acquisition unit that acquires location information provided by the location information providing system based on the detection information detected by itself, and a location information acquisition unit.
A position correction determination unit that determines the necessity of correction of the position based on whether or not the position corresponding to the acquired position information is included in the predetermined range based on the reference position.
A position estimation unit that estimates its own position based on the necessity determination result,
To function as
When the position corresponding to the acquired position information is included in the predetermined range based on each of the plurality of reference positions, the position estimation unit satisfies the condition based on the predetermined priority among the plurality of reference positions. A program that estimates a position corresponding to a specific reference position determined as the position of the communication terminal .

Images