JP2014016340A - Position determination device and position determination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position determination device which suppresses power consumed in position determination of a mobile terminal and also performs the highly accurate position determination.SOLUTION: Acquisition means 103 acquires terminal position information indicating a position of a mobile terminal 10 acquired by measurement. Distance calculation means 105 calculates a travel distance from a position indicated by the terminal position information to a position indicated by destination information. Estimated speed calculation means 106 calculates estimated speed which is an estimated value for travel speed of the mobile terminal. Travel time calculation means 108 compares the estimated speed and assumption speed pre-assumed as travel speed of the mobile terminal 10, selects the speed faster than the other, and calculates a travel time of the mobile terminal on the basis of the selected speed and the travel distance. Acquisition control means 109 controls the acquisition means 103 to perform acquisition of the terminal position information before the travel time passes less frequently than acquisition of the terminal position information after the travel time passes.

Description

  The present invention relates to a technique for determining the position of a mobile terminal.

2. Description of the Related Art In recent years, services that measure the position of a portable terminal using GPS (Global Positioning System) and position information of a base station and provide information corresponding to the position of the portable terminal are provided. However, if positioning is performed frequently, there is a problem that power consumption increases.
Therefore, a technique for reducing power consumption when using a positioning function of a mobile terminal has been proposed. The portable terminal described in Patent Document 1 measures the current position of its own device, and when the distance from the current position to the destination exceeds a predetermined distance, calculates the moving speed of the own device, The travel time required to travel up to is calculated. The mobile terminal does not perform positioning until the travel time elapses, and performs positioning when the travel time elapses.

  In another example described in Patent Document 1, the mobile terminal includes first positioning means and second positioning means that consumes less power and has a smaller positioning error than the first positioning means. When the distance to the ground is greater than or equal to the positioning error of the first positioning means, the first positioning means is selected, and when the distance to the destination is less than the error, the second positioning means is selected. . If the distance to the destination is greater than or equal to the positioning error of the first positioning means, the moving speed of the aircraft is calculated, the moving time required for moving to the destination is calculated, and the moving time has elapsed. Until this time, positioning is not performed, and positioning is performed by the first positioning means when the movement time has elapsed. In addition, if the destination has not reached the destination as a result of the positioning by the second positioning means, the moving speed of the own aircraft is calculated, the moving time required to move to the destination is calculated, and the moving time has elapsed. Until this time, positioning is not performed, and when the movement time elapses, positioning is performed by the second positioning means.

JP 2011-252721 A

However, the technique described in Patent Document 1 has the following problems. First, when the calculated moving speed is smaller than the actual moving speed, the start of positioning is delayed, so that the determination of arrival at the destination is delayed. Secondly, if the calculated moving speed is higher than the actual moving speed, the start of positioning is accelerated, and wasteful power is consumed. Third, since the error and power consumption of the positioning means are not always constant, the optimum positioning means cannot be selected under the assumption that the error and power consumption are constant.
Accordingly, an object of the present invention is to suppress the power consumption for position determination of a mobile terminal and perform position determination with high accuracy.

  The present invention provides destination storage means for storing destination information representing the position of the destination, acquisition means for acquiring terminal position information representing the position of the mobile terminal obtained by positioning, and acquired by the acquisition means. Positioning history storage means for storing terminal position information and time information indicating the time when the terminal position information is acquired in association with each other, and a position represented by the destination information from a position represented by the terminal position information A distance calculating means for calculating a moving distance up to, an estimated speed calculating means for calculating an estimated speed that is an estimated value of the moving speed of the mobile terminal based on the stored contents of the positioning history storage means, and a movement of the mobile terminal An assumed speed storage means for storing an assumed speed preliminarily assumed as a speed, a larger speed is selected by comparing the estimated speed and the assumed speed, and based on the selected speed and the moving distance; A travel time calculating means for calculating a travel time required for the mobile terminal to travel from a position represented by the terminal location information to a position represented by the destination information, and before the travel time has elapsed An acquisition control unit that controls the acquisition unit such that the frequency of acquisition of terminal location information is lower than the frequency of acquisition of terminal location information after the travel time has elapsed, and is represented by the terminal location information There is provided a position determination apparatus comprising: determination means for determining whether the mobile terminal has arrived at the destination based on the position and the position represented by the destination information.

  The position determination device includes an assumed speed update means for updating the assumed speed stored in the assumed speed storage means, and the positioning history storage means is calculated by the estimated speed calculation means based on the terminal position information. The estimated speed is stored in association with the terminal position information, and the assumed speed update means updates the assumed speed stored in the assumed speed storage means based on the stored contents of the positioning history storage means. It may be.

  The position determination device includes delay time storage means for storing an allowable delay time that is allowed when the determination of the arrival of the mobile terminal at the destination is delayed from the arrival of the mobile terminal at the destination. The acquisition control means compares the allowable delay time and the travel time, sets the longer one as the standby time, and the acquisition frequency of the terminal position information before the standby time elapses is the standby time. The acquisition unit may be controlled so as to be lower than the frequency of acquisition of terminal position information after elapse of time.

  In the position determination device, the determination unit reads a plurality of terminal position information in the order of the time represented by the time information from the positioning history storage unit, and the plurality of positions represented by the terminal position information in the order of the time. When the connected route overlaps the determination target area including the position represented by the destination information, it may be determined that the mobile terminal has arrived at the destination.

  In the position determination apparatus, the acquisition unit acquires terminal position information indicating the position of the mobile terminal obtained by positioning and error information indicating an error of the terminal position information, and a plurality of positioning methods are different from each other. One of the positioning means is set as a priority positioning means used by the acquisition means for acquiring the terminal position information, and the distance calculation means is calculated based on the terminal position information acquired from the priority positioning means. When the value obtained by performing a predetermined calculation on the travel distance is smaller than the error represented by the error information acquired from the priority positioning means, the alternative of the priority positioning means among the plurality of positioning means Terminal position information and error information are acquired from the positioning means, and the error represented by the error information acquired from the alternative positioning means is represented by the error information acquired from the priority positioning means. A first switching means for switching the setting by the setting means so that the alternative positioning means is a priority positioning means, and for each of the plurality of positioning means, the positioning means causes the positioning means to For each of the plurality of positioning means, a probability calculating means for calculating a switching occurrence probability that the setting switching by the first switching means occurs when set as a priority positioning means, the acquisition means from the positioning means Expected value calculation means for calculating an expected value of power consumption when the positioning means is set as priority positioning means by the setting means based on the power consumption when acquiring the terminal position information and the switching occurrence probability. And the expected power consumption value of the priority positioning means set by the setting means is larger than the expected power consumption value of the alternative positioning means. When, may have a second switching means for switching the setting by said setting means so as to preferentially positioning means the alternative positioning means.

  In the position determination apparatus, the estimated speed calculation means corrects the estimated speed so that the estimated speed decreases as the deviation between the direction in which the mobile terminal moves and the direction of the destination with reference to the position of the mobile terminal is large. You may make it do.

  Further, the present invention provides destination storage means for storing destination information indicating the position of the destination, terminal position information indicating the position of the mobile terminal obtained by positioning, and error information indicating an error in the terminal position information. Acquisition means for acquiring, terminal position information acquired by the acquisition means, and positioning history storage means for storing time information indicating the time when the terminal position information was acquired, and the terminal position information A distance calculating means for calculating a moving distance from the position represented by the destination information to the position represented by the destination information, and an estimate that is an estimated value of the moving speed of the mobile terminal based on the stored contents of the positioning history storage means The mobile terminal moves from a position represented by the terminal position information to a position represented by the destination information based on estimated speed calculation means for calculating a speed, and the estimated speed and the movement distance. The travel time calculating means for calculating the travel time required for the terminal, and the frequency of acquiring the terminal location information before the travel time has elapsed so as to be lower than the frequency of acquiring the terminal location information after the travel time has elapsed. Whether the mobile terminal has arrived at the destination based on the acquisition control means for controlling the acquisition means, the position indicated by the terminal position information, and the position indicated by the destination information. A determination means for determining the position, a plurality of positioning means having different positioning methods, a setting means for setting as a priority positioning means used by the acquisition means for acquiring the terminal position information, and acquisition from the priority positioning means A value obtained by performing a predetermined calculation on the movement distance calculated by the distance calculation means based on the terminal position information obtained is smaller than the error represented by the error information acquired from the priority positioning means. In this case, terminal position information and error information are acquired from an alternative positioning means that is not the priority positioning means among the plurality of positioning means, and an error represented by the error information acquired from the alternative positioning means is the priority positioning means. For each of the plurality of positioning means, the first switching means for switching the setting by the setting means so that the alternative positioning means becomes the priority positioning means when the error is smaller than the error represented by the error information acquired from Each of the plurality of positioning means, and a probability calculating means for calculating a switching occurrence probability that the setting switching by the first switching means occurs when the positioning means is set as the priority positioning means by the setting means. Based on the power consumption and the switching occurrence probability when the acquisition unit acquires the terminal location information from the positioning unit, the positioning unit An expected value calculating means for calculating an expected value of power consumption when set as the priority positioning means by the setting means, and an expected power consumption value of the priority positioning means set by the setting means is the consumption of the alternative positioning means. There is provided a position determination device comprising: a second switching unit that switches the setting by the setting unit so that the alternative positioning unit is a priority positioning unit when the electric power is larger than an expected value.

  In the position determination apparatus, frequency information acquisition means for acquiring frequency information indicating the frequency of acquisition of the terminal position information requested by an application program executed by the mobile terminal, and the acquisition means based on the frequency information You may make it have a frequency setting means to set the frequency of acquisition of terminal position information.

  In addition, the present invention provides a destination storage step for storing destination information representing the location of the destination, an acquisition step for acquiring terminal location information representing the location of the mobile terminal obtained by positioning, and acquisition in the acquisition step. A positioning history storage step for storing the terminal location information and the time information indicating the time when the terminal location information is acquired in association with each other, and the destination information from the location indicated by the terminal location information. A distance calculating step for calculating a moving distance to a position, an estimated speed calculating step for calculating an estimated speed that is an estimated value of the moving speed of the mobile terminal based on the stored contents of the positioning history storing step, and the mobile terminal An assumed speed storage step for storing an assumed speed preliminarily assumed as the moving speed of the vehicle, and comparing the estimated speed with the assumed speed to select a larger speed Based on the selected speed and the moving distance, a moving time for calculating a moving time required for the mobile terminal to move from the position represented by the terminal position information to the position represented by the destination information The terminal position information in the acquisition step so that the frequency of acquisition of the terminal position information before the travel time elapses is lower than the frequency of acquisition of the terminal position information after the travel time elapses. And determining whether or not the mobile terminal has arrived at the destination based on an acquisition control step for controlling acquisition of information, and a position represented by the terminal position information and a position represented by the destination information A position determination method comprising: a determination step.

  The present invention also provides a destination storage step for storing destination information indicating the position of the destination, terminal position information indicating the position of the mobile terminal obtained by positioning, and error information indicating an error in the terminal position information. An acquisition step of acquiring the terminal position information, a terminal history information acquired in the acquisition step, and a positioning history storage step of storing time information indicating the time at which the terminal position information was acquired in association with each other, and the terminal position information A distance calculating step for calculating a moving distance from the position represented by the destination information to the position represented by the destination information, and an estimate that is an estimated value of the moving speed of the mobile terminal based on the stored contents of the positioning history storing step Based on the estimated speed calculating step for calculating the speed, and the estimated speed and the moving distance, the position represented by the destination information from the position represented by the terminal position information A travel time calculating step for calculating a travel time required for the mobile terminal to travel, and a frequency of acquisition of the terminal position information before the travel time elapses. Based on the acquisition control step for controlling the acquisition of the terminal position information in the acquisition step, the position represented by the terminal position information and the position represented by the destination information so as to be lower than the frequency of acquisition Priority positioning used for acquiring the terminal location information in the acquiring step, wherein a determination step for determining whether or not the mobile terminal has arrived at the destination and a plurality of positioning means having different positioning methods are used. A moving distance calculated in the distance calculating step based on the setting step set as a means and the terminal position information acquired from the priority positioning means. If the calculated value is smaller than the error represented by the error information acquired from the priority positioning means, the terminal position information from the alternative positioning means that is not the priority positioning means among the plurality of positioning means. Error information is obtained, and when the error represented by the error information obtained from the alternative positioning means is smaller than the error represented by the error information obtained from the priority positioning means, the alternative positioning means is given priority. A first switching step for switching the setting in the setting step so as to be a positioning means, and the first switching when each of the plurality of positioning means is set as a priority positioning means by the setting step. A probability calculating step of calculating a switching occurrence probability that setting switching occurs in steps, and the acquisition step for each of the plurality of positioning means. Based on the power consumption when acquiring the terminal location information from the positioning means and the switching occurrence probability, the expected value of the power consumption when the positioning means is set as the priority positioning means by the setting step is calculated. When the expected value calculation step of calculating and the expected value of the power consumption of the priority positioning means set by the setting step is larger than the expected value of the power consumption of the alternative positioning means, the alternative positioning means is designated as the priority positioning means. And a second switching step for switching the setting in the setting step as described above.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the power consumption of the position determination of a mobile terminal, a highly accurate position determination can be performed.

The figure which shows the whole communication system. The figure which shows the hardware constitutions of the server 5. The figure which shows base station table TB1. The figure which shows the hardware constitutions of the mobile terminal 10. The figure which shows the function structure of the position determination apparatus. The figure which shows destination table TB2. The figure which shows positioning log | history table TB3. The figure which shows assumption speed table TB4. 4 is a flowchart showing the operation of the position determination device 100. The figure which shows the function structure of the position determination apparatus 200. FIG. The flowchart which shows operation | movement of the position determination apparatus 200. The figure which shows the function structure of the position determination apparatus 300. FIG. 5 is a flowchart showing the operation of the position determination device 300. The figure which shows the function structure of the position determination apparatus 400. 5 is a flowchart showing the operation of the position determination device 400. 5 is a flowchart showing the operation of the position determination device 400. The figure which shows assumption speed table TB5. The figure which illustrated the destination and the position of a mobile terminal. The figure which illustrated the destination and the position of a mobile terminal. The figure which illustrated the destination and the position of a mobile terminal. The figure which illustrated the destination and the position of a mobile terminal.

(1) First Embodiment (1-1) Overall Configuration FIG. 1 is a diagram illustrating an entire communication system according to a first embodiment of the present invention.
The mobile communication network 1 is a communication network that provides a mobile communication service to the mobile terminal 10. The mobile communication network 1 includes nodes such as a base station 2, an exchange station 3, a service control station 4, and a server 5. The mobile communication network 1 is connected to the communication network 7 via the gateway exchange 6. The communication network 7 is, for example, the Internet, a fixed telephone network, a mobile communication network managed by a communication carrier different from the mobile communication network 1 or the like. Note that the number of each node, gateway exchange 6, communication network 7, and mobile terminal 10 included in the mobile communication network 1 is not limited to the illustrated number.

  The base station 2 periodically transmits the area identification information unique to the location registration area to which the cell in which the base station is provided and the base station identifier unique to the base station. The mobile terminal 10 stores the received area identification information, and requests location registration to the base station 2 when receiving area identification information different from the stored area identification information. Then, the area identification information is registered in the service control station 4 in association with the terminal identifier unique to the mobile terminal 10.

The switching center 3 has a circuit switching function. When the exchange 3 receives a connection request addressed to the mobile terminal 10B from the mobile terminal 10A via any of the base stations 2, the exchange 3 acquires area identification information corresponding to the mobile terminal 10B from the service control station 4, and the area identification The connection request is transmitted to all base stations 2 belonging to the location registration area indicated by the information. Then, these base stations 2 transmit the connection request to the mobile terminal 10B all at once, and the mobile terminal 10B receives the connection request, whereby the communication line between the mobile terminal 10A and the mobile terminal 10B is connected. .
The switching center 3 also has a packet communication routing function. Upon receiving the packet, the switching center 3 reads the destination communication address included in the header of the packet, determines a transfer destination according to the communication address based on the routing table, and transfers the packet to the transfer destination. .

(1-2) Server Configuration FIG. 2 is a diagram illustrating a hardware configuration of the server 5. The server 5 includes a control unit 51, a storage unit 52, a communication unit 53, an operation unit 54, and a display unit 55. The control unit 51 includes an arithmetic device such as a CPU (Central Processing Unit) 51a and a storage device such as a ROM (Read Only Memory) 51b and a RAM (Random Access Memory) 51c. The storage unit 52 includes a storage device such as a hard disk drive. The communication unit 53 includes a communication interface. The operation unit 54 includes a keyboard and a mouse. The display unit 55 includes a display device using a liquid crystal, an organic EL (Electro-Luminescence) element, or the like. The control unit 51 performs communication with the mobile terminal 10 and other nodes by controlling the communication unit 53 in accordance with the user operation received by the operation unit 54. The storage unit 52 stores an OS (Operating System) and application programs, and the control unit 51 controls the operation of the server 5 by executing these programs.

FIG. 3 is a diagram illustrating the base station table TB1. The base station table TB1 is stored in the storage unit 52. The base station table TB1 has a “base station identifier” field, a “latitude” field, and a “longitude” field.
In the “base station identifier” field, a base station identifier unique to each base station 2 is stored.
The “latitude” field stores information indicating the latitude of the position where the base station 2 is located.
The “longitude” field stores information indicating the longitude of the position where the base station 2 is located.
For example, in the record in the first row in FIG. 4, the latitude “north latitude a1 degree b1 minute c1 second” and the longitude “east longitude d1 degree e1 minute f1 second” are associated with the base station identifier “36556933”.

(1-3) Configuration of Mobile Terminal FIG. 4 is a diagram illustrating a hardware configuration of the mobile terminal 10. The mobile terminal 10 is a mobile phone, for example, and includes a control unit 11, a storage unit 12, a communication unit 13, an operation unit 14, a display unit 15, a voice input / output unit 16, and a clock unit 17. The control unit 11 includes an arithmetic device such as a CPU 11a and a storage device such as a ROM 11b and a RAM 11c. The storage unit 12 includes a storage device such as an EEPROM (Electronically Erasable and Programmable ROM) or an SRAM (Static Random Access Memory). The communication unit 13 includes an antenna and a communication interface. The operation unit 14 includes a plurality of operators. The display unit 15 includes a display device using a liquid crystal, an organic EL element, or the like. The display unit 15 has the function of the operation unit 14 and detects an operation performed by the user on the screen of the display unit 15. The voice input / output unit 16 includes a speaker, a microphone, and a voice processing circuit. The clock unit 17 outputs time information representing the date and time. The control unit 11 controls the communication unit 13 in accordance with a user operation received by the operation unit 14, thereby allowing other mobile terminals 10 or terminals or servers connected to the communication network 7 via the mobile communication network 1. Communicate with other devices. The storage unit 12 stores an OS and application programs, and the control unit 11 controls the operation of the mobile terminal 10 by executing these programs.

FIG. 5 is a diagram illustrating a functional configuration of the position determination device 100. Each function of the position determination device 100 is realized in the mobile terminal 10 by the control unit 11 executing an application program.
The destination storage unit 102 stores destination information representing the position of the destination. The destination information includes the latitude and longitude of the destination and the radius of a circle centered on this position. The destination setting unit 101 stores map information representing a map, and displays a map image on the display unit 15 based on the map information. The map information includes position information indicating the latitude and longitude of each point on the map.

  FIG. 6 is a diagram showing the destination table TB2. The destination table TB2 is stored in the storage unit 12. The destination table TB2 has a “latitude” field, a “longitude” field, and a “radius” field. When the user designates a destination on the map using the operation unit 14, the destination setting unit 101 identifies the latitude and longitude of the designated destination from the map information, and the destination storage unit 102 is identified. The latitude and longitude are written in the destination table TB2. In the present embodiment, 50 m is preset as an initial value of the radius, and a circular area having a radius of 50 m centering on the destination position designated by the user is set as the determination target area. The determination unit 110 described later determines that the mobile terminal 10 has arrived at the destination if the position represented by the terminal position information is included in the determination target area. The radius of the determination target area may not be 50 m, and the shape of the determination target area may be a shape other than a circle. Further, when the user designates the destination, the radius may also be designated.

  The acquisition unit 103 acquires terminal position information indicating the position of the mobile terminal obtained by positioning. Here, the positioning means will be described. In the present embodiment, the position of the mobile terminal 10 is measured using the base station identifier transmitted from the base station 2. The acquisition unit 103 transmits the base station identifier received from the base station 2 to the server 5. The server 5 reads the latitude and longitude associated with the base station identifier from the base station table TB1, and transmits terminal position information including the read latitude and longitude to the mobile terminal 10. Other positioning means may be used. For example, the mobile terminal 10 may receive a GPS signal or the like, and the mobile terminal 10 or the server 5 may calculate the position of the mobile terminal 10 based on this signal. .

The positioning history storage unit 104 stores the terminal position information acquired by the acquisition unit 103 and time information indicating the time when the terminal position information is acquired in association with each other.
FIG. 7 is a diagram showing the positioning history table TB3. The positioning history table TB3 is stored in the storage unit 12. The positioning history table TB3 includes a “terminal position information” field, an “estimated speed” field, and a “time information” field. The positioning history storage unit 104 acquires time information indicating the time when the terminal position information is acquired by the acquiring unit from the clock unit 17, and writes the terminal position information and the time information in association with each other in the positioning history table TB3.

  The distance calculating unit 105 calculates a moving distance from the position represented by the terminal position information to the position represented by the destination information. Specifically, the movement distance from the position represented by the latitude and longitude included in the terminal position information to the position represented by the latitude and longitude included in the destination information is calculated. Note that the distance from the position represented by the latitude and longitude included in the terminal position information to the position represented by the latitude and longitude included in the destination information is calculated, and the radius included in the destination information is calculated from this. The distance subtracted from the distance may be used as the movement distance.

  The estimated speed calculating means 106 calculates an estimated speed that is an estimated value of the moving speed of the mobile terminal 10 based on the stored contents of the positioning history storage means 104. The calculation of the estimated speed requires at least two sets of records including the terminal position information and the time information. Therefore, when the number of records stored in the positioning history storage unit 104 is less than two sets, the estimated speed is calculated. The means 106 causes the acquisition means 103 to acquire terminal location information so that there are two or more records. In this embodiment, the estimated speed calculation means 106 reads the latest record and the second newest record in the positioning history table TB3, calculates the distance from the two terminal position information, calculates the time difference from the two time information, The estimated speed is calculated by dividing the distance by the time difference, and the estimated speed is written in the “estimated speed” field of the latest record. In addition, as long as two or more records are obtained for obtaining the estimated speed, any record may be selected.

The assumed speed storage unit 107 stores the position of the mobile terminal 10 and the assumed speed assumed in advance as the movement speed of the mobile terminal 10 at the position in association with each other.
FIG. 8 is a diagram showing an assumed speed table TB4. The assumed speed table TB4 is created in advance and stored in the storage unit 12. The assumed speed table TB4 has a “position” field and an “assumed speed” field.
In the “position” field, the position of the mobile terminal 10 is written. The position of the mobile terminal 10 is represented, for example, as a circular area centered on a certain point, and the latitude, longitude and radius of the center are written in the “position” field.
In the “assumed speed” field, an assumed speed preliminarily assumed as the moving speed of the mobile terminal 10 at the position written in the “position” field is written. For example, if the position of the mobile terminal 10 corresponds to a station, a train is assumed as a means of transportation that the user uses for movement, so the average speed of the train is written in the “assumed speed” field. Similarly, if 10 locations of mobile terminals correspond to bus stops, taxi ranks, and airports, buses, taxis, and airplanes are assumed as means of transportation. "Is written in the field.

  The travel time calculation means 108 compares the estimated speed with the assumed speed, selects the larger speed, and based on the selected speed and the travel distance, from the position represented by the terminal position information to the destination information. The travel time required for the mobile terminal 10 to travel to the position shown is calculated. Specifically, the travel time calculation unit 108 reads the assumed speed corresponding to the position represented by the terminal position information from the assumed speed table TB4. The moving time calculation means 108 compares the read estimated speed with the estimated speed calculated by the estimated speed calculation means 106, and selects a speed having a larger value. Then, the travel time calculation means 108 calculates the travel time by dividing the travel distance at the selected speed.

  The acquisition control unit 109 obtains the frequency of acquiring the terminal location information before the travel time calculated by the travel time calculation unit 108 is lower than the frequency of acquiring the terminal location information after the travel time has elapsed. Next, the acquisition unit 103 is controlled. In the present embodiment, the acquisition unit 103 does not acquire the terminal position information until the movement time elapses. If the movement time elapses, the acquisition unit 103 acquires the terminal position information. The means 103 is controlled.

  The determining unit 110 determines whether the mobile terminal 10 has arrived at the destination based on the position represented by the terminal position information and the position represented by the destination information. Specifically, the determination unit 110 determines that the mobile terminal 10 has arrived at the destination if the position represented by the terminal position information is included in the determination target area. As described above, since the radius of the determination target area of this embodiment is 50 m, if the movement distance calculated by the distance calculation unit 105 is equal to or less than this radius, it is determined that the mobile terminal 10 has arrived at the destination. .

  The notification unit 111 notifies the user of arrival at the destination when the determination unit 110 determines that the mobile terminal 10 has arrived at the destination. For example, a message notifying arrival at the destination is displayed on the display unit 55.

(1-4) Operation of the First Embodiment FIG. 9 is a flowchart showing the operation of the position determination device 100.
In step S101, the destination storage means 102 stores the destination designated by the user.
In step S102, the acquisition unit 103 acquires terminal location information, and the positioning history storage unit 104 stores the terminal location information and time information in association with each other.
In step S103, the distance calculation unit 105 calculates the movement distance.

  FIG. 18 is a diagram illustrating destinations and positions of mobile terminals. Point A is the position represented by the second most recent terminal position information in the positioning history table, and point B is the position represented by the latest terminal position information. Point C is the position represented by the destination information in the destination table. The circle D is a circle with a radius of 50 m centered on the point C, and the inside of this circle is the determination target region. In this example, the moving distance calculated by the distance calculating means is the length of the line segment BC connecting the points B and C.

In step S104, the determination unit 110 determines whether the mobile terminal 10 has arrived at the destination. If it is determined that the destination has been reached (step S104: YES), the process proceeds to step S110. If it is determined that the destination has not been reached (step S104: NO), the process proceeds to step S105. In the example of FIG. 18, since the length of the line segment BC is longer than the radius of the circle D, it is determined that the destination has not been reached.
In step S105, the estimated speed calculation means 106 calculates an estimated speed. In the example of FIG. 18, the time difference is calculated from the time information corresponding to the point A and the time information corresponding to the point B, and the value obtained by dividing the length of the line segment AB by this time difference is the estimated speed.
In step S106, the traveling time calculation means 108 compares the estimated speed with the assumed speed. If the assumed speed is large (step S106: YES), the process proceeds to step S107, and if the estimated speed is large (step S106: NO). ) Proceeds to step S108.

In step S107, the travel time calculation means 108 calculates the travel time from the assumed speed and the travel distance.
In step S108, the travel time calculation means 108 calculates the travel time from the estimated speed and the travel distance.
In step S109, the acquisition control means 109 determines whether or not the travel time has elapsed. If the travel time has elapsed (step S109: YES), the process returns to step S102, and the travel time has not elapsed. In (Step S109: NO), the determination in Step S109 is repeated after a predetermined time.
In step S110, the notification unit 111 notifies the user of arrival at the destination.

The above is the operation of this embodiment.
For example, a user who has a mobile terminal may temporarily stay in a certain place or temporarily slow down the moving speed. In such a case, if positioning is performed, the estimated speed is There is a possibility that it is estimated to be smaller than the average value of the moving speed. Further, the estimated speed may be estimated to be smaller than the actual moving speed due to the error of the positioning means. In these cases, since the travel time calculated by the travel time calculation means is longer than the actual travel time, the timing for determining the arrival at the destination may be delayed from the arrival at the destination. In contrast, in the present embodiment, the estimated speed is compared with the assumed speed, the larger speed is selected, the travel time is calculated based on the selected speed and the travel distance, and the travel time elapses. Since the acquisition means is controlled so that the acquisition frequency of the previous terminal location information is lower than the acquisition frequency of the terminal location information after the travel time has elapsed, it is prevented that the determination of arrival at the destination is delayed. be able to.

(2) Second Embodiment (2-1) Configuration of Second Embodiment Differences of the second embodiment from the first embodiment will be described. The same reference numerals as those in the first embodiment are assigned to the same components as those in the first embodiment.
FIG. 10 is a diagram illustrating a functional configuration of the position determination device 200. Each function of the position determination device 200 is realized in the mobile terminal 10 by the control unit 11 executing an application program.
The position determination apparatus 200 does not include the assumed speed storage unit 107 included in the position determination apparatus 100 of the first embodiment.

  The delay time storage means 250 stores an allowable delay time that is allowed when the determination of the arrival of the mobile terminal at the destination is delayed from the arrival of the mobile terminal at the destination. The allowable delay time may be stored in the storage unit 12 as the allowable delay time input by the user to the mobile terminal 10, or may be set in advance in an application program executed by the control unit 11. In this embodiment, the allowable delay time is 3 minutes, but the allowable delay time may be any length.

  The travel time calculation means 208 calculates the travel time required for the mobile terminal 10 to travel from the position represented by the terminal position information to the position represented by the destination information based on the estimated speed and the travel distance. Specifically, the travel time calculation unit 208 calculates the travel time by dividing the travel distance by the estimated speed calculated by the estimated speed calculation unit 106.

  The acquisition control means 209 compares the allowable delay time and the movement time, sets the longer one as the standby time, and the terminal frequency information acquisition frequency before the standby time elapses is the terminal after the standby time has elapsed. The acquisition unit 103 is controlled so as to be lower than the frequency of acquisition of position information. For example, when the travel time is 2 minutes, 3 minutes, which is an allowable delay time, is selected as the standby time. In the present embodiment, the acquisition unit 103 does not acquire the terminal position information until the standby time elapses. If the standby time has elapsed, the acquisition unit 103 acquires the terminal position information. The means 103 is controlled.

(2-2) Operation of Second Embodiment FIG. 11 is a flowchart showing the operation of the position determination device 200.
In step S201, the destination storage means 102 stores the destination designated by the user.
In step S202, the acquisition unit 103 acquires terminal location information, and the positioning history storage unit 104 stores the terminal location information and time information in association with each other.
In step S203, the distance calculation unit 105 calculates the movement distance.
In step S204, the determination unit 110 determines whether the mobile terminal 10 has arrived at the destination. If it is determined that the destination has been reached (step S204: YES), the process proceeds to step S211. If it is determined that the destination has not been reached (step S204: NO), the process proceeds to step S205.

In step S205, the estimated speed calculation means 106 calculates an estimated speed.
In step S206, the travel time calculation means 208 calculates the travel time from the estimated speed and the travel distance.
In step S207, the acquisition control unit 209 compares the allowable delay time with the travel time. If the allowable delay time is longer (step S207: YES), the process proceeds to step S208, and the travel time is longer. In (Step S207: NO), the process proceeds to Step S209.

In step S208, the acquisition control unit 209 sets the allowable delay time to the standby time.
In step S209, the acquisition control unit 209 sets the travel time to the standby time.
In step S210, the acquisition control means 109 determines whether or not the standby time has elapsed. If the standby time has elapsed (step S210: YES), the process returns to step S202, and the travel time has not elapsed. In (Step S210: NO), the determination in Step S210 is repeated after a predetermined time.
In step S211, the notification unit 111 notifies the user of arrival at the destination.

The above is the operation of this embodiment.
For example, the user who has the mobile terminal may temporarily increase the moving speed, but if positioning is performed in such a case, the estimated speed is estimated to be larger than the average value of the actual moving speed. there is a possibility. Further, the estimated speed may be estimated to be larger than the actual moving speed due to the error of the positioning means. In these cases, since the travel time calculated by the travel time calculation means is shorter than the actual travel time, the timing for determining the arrival at the destination is advanced, and there is a possibility that useless power is consumed. On the other hand, in the present embodiment, the longer one is set as the standby time by comparing the allowable delay time and the movement time, and the frequency of acquisition of the terminal position information before the standby time elapses is the standby time. Since the acquisition unit is controlled to be lower than the frequency of acquisition of the terminal position information after elapse of time, it is possible to prevent wasted power consumption.

(3) Third Embodiment (3-1) Configuration of Third Embodiment Points different from the first embodiment of the third embodiment will be described. The same reference numerals as those in the first embodiment are assigned to the same components as those in the first embodiment.
FIG. 12 is a diagram illustrating a functional configuration of the position determination device 300. Each function of the position determination device 300 is realized in the mobile terminal 10 when the control unit 11 executes an application program.
The position determination apparatus 300 does not include the assumed speed storage unit 107 included in the position determination apparatus 100 of the first embodiment.

  The travel time calculation unit 308 calculates the travel time required for the mobile terminal 10 to travel from the position represented by the terminal position information to the position represented by the destination information based on the estimated speed and the travel distance. Specifically, the travel time calculation unit 308 calculates the travel time by dividing the travel distance by the estimated speed calculated by the estimated speed calculation unit 106.

  The determination unit 310 reads a plurality of terminal position information from the positioning history storage unit 104 in the order of the time represented by the time information, and a route connecting the plurality of positions represented by the terminal position information in the order of the time is the destination information. It is determined that the mobile terminal 10 has arrived at the destination when it overlaps with the determination target area including the position represented by. In the present embodiment, the determination unit 310 reads the two terminal position information from the positioning history storage unit 104 in order from the newest time represented by the time information, and displays the two positions represented by the two terminal position information as lines. By connecting in minutes, the route along which the mobile terminal 10 has moved is specified. Then, the determination unit 310 sets a circular area having a radius of 50 m centered on the position represented by the destination information as a determination target area, and when the identified route overlaps the determination target area, the mobile terminal 10 It is determined that it has arrived on the ground. That is, when either the start point or the end point of the identified route is included in the determination target area, it is determined that the mobile terminal 10 has arrived at the destination. Although neither the start point nor the end point is included in the determination target area, it is determined that the mobile terminal 10 has arrived at the destination even when the mobile terminal 10 passes through the determination target area.

(3-2) Operation of Third Embodiment FIG. 13 is a flowchart showing the operation of the position determination device 300.
In step S301, the destination storage means 102 stores the destination designated by the user.
In step S302, the acquisition unit 103 acquires terminal location information, and the positioning history storage unit 104 stores the terminal location information and time information in association with each other.
In step S303, the distance calculation unit 105 calculates a movement distance.
In step S304, the determination unit 310 identifies the route along which the mobile terminal 10 has moved.

In step S305, the determination unit 310 determines whether the mobile terminal 10 has arrived at the destination. If it is determined that the destination has been reached (step S305: YES), the process proceeds to step S309. If it is determined that the destination has not been reached (step S305: NO), the process proceeds to step S306.
In step S306, the estimated speed calculation means 106 calculates an estimated speed.
In step S307, the travel time calculation unit 308 calculates the travel time from the estimated speed and the travel distance.

In step S308, the acquisition control unit 109 determines whether or not the travel time has elapsed. If the travel time has elapsed (step S308: YES), the process returns to step S302, and the travel time has not elapsed. In (Step S308: NO), the determination in Step S308 is repeated after a predetermined time.
In step S309, the notification unit 111 notifies the user of arrival at the destination.

The above is the operation of this embodiment.
For example, when the moving speed is estimated to be large, the mobile terminal may have passed through the determination target area in calculation. In this case, there is a possibility that even if the mobile terminal is located in the determination target area, it is not determined that the mobile terminal has arrived. On the other hand, in this embodiment, when the route specified from the plurality of terminal position information overlaps the determination target area, it is determined that the mobile terminal has arrived at the destination, so the moving speed is estimated to be larger. In this case, it is possible to prevent the arrival determination from being performed and useless power consumption from being consumed.

(4) Fourth Embodiment (4-1) Configuration of the Fourth Embodiment Points different from the first embodiment of the fourth embodiment will be described. The same reference numerals as those in the first embodiment are assigned to the same components as those in the first embodiment.
FIG. 14 is a diagram illustrating a functional configuration of the position determination device 400. Each function of the position determination device 400 is realized in the mobile terminal 10 by the control unit 11 executing an application program.
The position determination apparatus 400 does not include the assumed speed storage unit 107 included in the position determination apparatus 100 of the first embodiment.

  The acquisition unit 403 acquires terminal position information representing the position of the mobile terminal 10 obtained by positioning, and error information representing an error in the terminal position information. Acquisition of terminal location information is the same as in the first embodiment. The error information is transmitted from the positioning means together with the terminal position information. The error information is represented by, for example, three levels of positioning levels according to the degree of error of the terminal position information. The positioning level 1 corresponds to an error of 1 km, the positioning level 2 corresponds to an error of 200 m, and the positioning level 3 corresponds to an error. It corresponds to 50m. The acquisition unit 403 stores the correspondence between each positioning level and the error, and replaces the positioning level of the acquired error information with an error based on this correspondence. The error information is written in the positioning history table TB3 in association with the terminal position information.

  The travel time calculation means 408 calculates the travel time required for the mobile terminal 10 to move from the position represented by the terminal position information to the position represented by the destination information based on the estimated speed and the travel distance. Specifically, the travel time calculation unit 408 calculates the travel time by dividing the travel distance by the estimated speed calculated by the estimated speed calculation unit 106.

  The setting unit 451 sets any one of a plurality of positioning units having different positioning methods as the priority positioning unit used by the acquisition unit 403 to acquire terminal position information. The plurality of positioning means may be any positioning means such as a positioning means using a base station identifier similar to that of the first embodiment and a positioning means using a GPS signal as long as the positioning methods are different from each other. The storage unit 12 stores identification information indicating one of a plurality of positioning means as the priority positioning means used for acquiring the terminal position information. When the acquisition means acquires the terminal position information, the identification information Terminal position information is acquired by the positioning means indicated by the information. Note that the initial value of the identification information may be stored in the storage unit 12 in advance, or the user may specify the positioning means. Moreover, the initial value of identification information may be set in the application program.

  The first switching means 452 is an error in which a value obtained by performing a predetermined calculation on the moving distance calculated by the distance calculating means 105 based on the terminal position information acquired from the priority positioning means is obtained from the priority positioning means. When the error is smaller than the error represented by the information, the terminal position information and the error information are obtained from the alternative positioning means that is not the priority positioning means among the plurality of positioning means, and are represented by the error information obtained from the alternative positioning means. When the error is smaller than the error represented by the error information acquired from the priority positioning means, the setting of the setting means 451 is switched so that the alternative positioning means is the priority positioning means. Specifically, the acquisition unit 403 acquires terminal position information and error information by the priority positioning unit, and the distance calculation unit 105 calculates the movement distance based on the terminal position information. The predetermined calculation is, for example, an operation that multiplies the moving distance by a coefficient. This coefficient may be set in advance according to conditions such as whether accuracy is prioritized, power consumption reduction is prioritized, and how much is prioritized, or may be specified by the user. Good.

  The probability calculating unit 453 calculates, for each of the plurality of positioning units, the switching occurrence probability that the setting switching by the first switching unit 452 occurs when the positioning unit is set as the priority positioning unit by the setting unit 451. . The switching occurrence probability may be calculated in any way. For example, it is assumed that the error distribution follows a normal distribution when the horizontal axis is the error value and the vertical axis is the number of errors generated. As described above, the setting switching by the first switching unit 452 is performed by using a value obtained by performing a predetermined calculation on the movement distance calculated by the distance calculating unit 105 based on the terminal position information acquired from the priority positioning unit. This may occur when the error is smaller than the error represented by the error information acquired from the priority positioning means. Therefore, the integrated value of the error distribution is calculated in a section that is equal to or greater than a value obtained by performing a predetermined calculation on the movement distance. The ratio of the integral value to the integral value of the entire interval is the switching occurrence probability. As another method, a history of setting switching by the first switching unit 452 may be recorded, and a switching occurrence probability may be calculated based on this history.

The expected value calculation means 454 is configured so that the setting means 451 determines that the positioning means uses the setting means 451 based on the power consumption and the switching occurrence probability when the acquisition means 403 acquires terminal position information from the positioning means. An expected value of power consumption when set as the priority positioning means is calculated. The power consumption when the acquisition unit 403 acquires terminal location information from each positioning unit may be obtained from an actual measurement value or a theoretical value. The expected value of power consumption is calculated by the following equation.
Epx = (1−Px) × Ex + Px × (Ex + Ey) Equation (1)
Epy = (1−Py) × Ey + Py × (Ex + Ey) Equation (2)
However,
Epx: Expected value of power consumption when the positioning means x is the priority positioning means,
Epy: Expected value of power consumption when the positioning means y is the priority positioning means,
Px: switching occurrence probability when the positioning means x is the priority positioning means,
Py: switching occurrence probability when the positioning means y is the priority positioning means,
Ex: power consumption when acquiring terminal position information from the positioning means x,
Ey: power consumption when acquiring terminal location information from positioning means y,
It is.

  The second switching means 455 makes the alternative positioning means the priority positioning means when the expected power consumption value of the priority positioning means set by the setting means 451 is larger than the expected power consumption value of the alternative positioning means. The setting of the setting unit 451 is switched. For example, when the positioning means x is set as the priority positioning means, if Epy <Epx, the setting is switched so that the positioning means y is the priority positioning means.

(4-2) Operation of the Fourth Embodiment FIGS. 15 and 16 are flowcharts showing the operation of the position determination device 400. FIG. 16 is a diagram showing details of step S402 in FIG.
First, FIG. 15 will be described.
In step S401, the destination storage unit 102 stores the destination designated by the user.
In step S402, the first switching unit 452 and the second switching unit 455 perform setting or switching of the priority positioning unit.
In step S403, the acquisition unit 403 acquires terminal position information and error information from the priority positioning unit, and the positioning history storage unit 104 stores the terminal position information, error information, and time information in association with each other.
In step S404, the distance calculation unit 105 calculates the movement distance.

In step S405, the determination unit 110 determines whether the mobile terminal 10 has arrived at the destination. If it is determined that the destination has been reached (step S405: YES), the process proceeds to step S409. If it is determined that the destination has not been reached (step S405: NO), the process proceeds to step S406.
In step S406, the estimated speed calculation means 106 calculates the estimated speed.
In step S407, the travel time calculation means 408 calculates the travel time from the estimated speed and the travel distance.

In step S408, the acquisition control unit 109 determines whether or not the travel time has elapsed. If the travel time has elapsed (step S408: YES), the process returns to step S402, and the travel time has not elapsed. In (Step S408: NO), the determination in Step S408 is repeated after a predetermined time.
In step S409, the notification unit 111 notifies the user of arrival at the destination.

Next, FIG. 16 will be described.
Note that the priority positioning means is preset by the setting means 451.
In step S501, the acquisition unit 403 acquires terminal position information and error information by the priority positioning unit, and the distance calculation unit 105 calculates a movement distance based on the terminal position information.
In step S502, the first switching unit 452 compares the value obtained by multiplying the moving distance by the coefficient and the error. If the error is larger (step S502: YES), the process proceeds to step S503, where the error is greater. If smaller (step S502: NO), the process proceeds to step S506.

In step S503, the first switching unit 452 acquires terminal position information and error information by the alternative positioning unit.
In step S504, the first switching unit 452 compares the error of the alternative positioning unit with the error of the priority positioning unit. If the error of the alternative positioning unit is smaller (step S504: YES), the process proceeds to step S505. If the error of the priority positioning means is smaller (step S504: NO), the process proceeds to step S506.
In step S505, the first switching unit 452 switches the setting by the setting unit 451 so that the alternative positioning unit is the priority positioning unit.

In step S506, the probability calculation unit 453 calculates a switching occurrence probability.
In step S507, the expected value calculation unit 454 calculates an expected value of power consumption.
In step S508, the second switching unit 455 compares the expected value of the power consumption of the alternative positioning unit with the expected value of the power consumption of the priority positioning unit, and if the expected value of the power consumption of the alternative positioning unit is smaller ( In step S508: YES, the process proceeds to step S509. If the expected power consumption value of the priority positioning means is smaller (step S508: NO), the process proceeds to step S403 in FIG.
In step S509, the second switching unit 455 switches the setting by the setting unit 451 so that the alternative positioning unit is the priority positioning unit, and the process proceeds to step S403 in FIG.

The above is the operation of the present embodiment.
Since the error of the positioning means and the power consumption for acquiring the terminal position information from the positioning means are not always constant, it is possible to select the optimum positioning means on the assumption that the error and the power consumption are constant. It may not be possible. On the other hand, in this embodiment, the positioning means is switched based on the error when the terminal position information is actually acquired or the expected value of the power consumption based on the switching occurrence probability of a plurality of positioning means. Even when the power consumption changes, the optimum positioning means can be selected.

(5) Fifth Embodiment Differences of the fifth embodiment from the first embodiment will be described.
Based on the stored contents of the positioning history storage means 104, the estimated speed calculation means 106 calculates a destination direction component of the movement speed of the mobile terminal 10 as an estimated speed. Specifically, it is as follows.
FIG. 19 is a diagram illustrating the destination and the position of the mobile terminal 10. Point A is the position represented by the second most recent terminal position information stored in the positioning history table TB3, and point B is the position represented by the latest terminal position information. Point C is a position represented by the destination information stored in the destination table TB2. A circle D is a determination target region. The point E is a point on the determination target region whose distance from the point B is the shortest. In this example, since the determination target area is a circle, the point E coincides with the intersection of the straight line BC and the circle D. The estimated speed calculation means 106 calculates an angle θ formed by the vector AB and the straight line BE with the point A and the point B as the start point and the end point, respectively. Then, the estimated speed calculation means 106 calculates the estimated speed v of the mobile terminal 10 based on the terminal position information and time information of the points A and B by the same method as in the first embodiment, and calculates the calculated estimated speed v. The estimated speed Va is corrected by the following equation.

Va = ((1 + n) / 2n- (1-n) / 2n × cos θ) × v Equation (3)
However, n is 1 <n. For example, if n = 2,
When θ = 0 ° Va = v
When θ = 60 ° Va = 0.875v
When θ = 120 ° Va = 0.625v
When θ = 180 ° Va = 0.5v
It becomes. That is, the estimated speed calculation means 106 corrects the estimated measure so that the estimated speed is decreased as the deviation between the direction in which the mobile terminal 10 moves and the direction of the destination with respect to the position of the mobile terminal 10 is larger. When the direction in which the mobile terminal 10 moves coincides with the direction of the destination based on the position of the mobile terminal 10, the estimated measure is maximized, and the direction in which the mobile terminal 10 moves and the position of the mobile terminal 10 are used as a reference. The estimated measure is minimized when the direction of the destination is opposite. Therefore, according to this embodiment, the frequency of acquisition of terminal location information is suppressed compared to the first embodiment.

  In the present embodiment, as illustrated above, the estimated measure is a positive value even when the mobile terminal 10 exhibits a behavior away from the destination. This is because the mobile terminal 10 may exhibit a behavior of partially leaving the destination while approaching the destination as a whole. For example, there may be a case where the user of the mobile terminal 10 makes a detour by mistake, or has to take a route partially away from the destination. In such a case, if the estimated measure is 0 or a negative value, the determination of arrival at the destination may be delayed. In this embodiment, since the estimated measure is a positive value even when the mobile terminal 10 shows a behavior away from the destination, it is possible to prevent the determination of arrival at the destination from being delayed.

(6) Sixth Embodiment Differences of the sixth embodiment from the first embodiment will be described.
The estimated speed calculation means 106 calculates the distance between the position represented by the two terminal position information stored in the positioning history storage means 104 and the destination, and calculates the estimated speed based on the difference between the two calculated distances. To do. Specifically, it is as follows.
FIG. 20 is a diagram illustrating the destination and the position of the mobile terminal 10. Point A is the position represented by the second most recent terminal position information stored in the positioning history table TB3, and point B is the position represented by the latest terminal position information. Point C is a position represented by the destination information stored in the destination table TB2. Point F is one point on a straight line BC passing through points B and C, and the distance between point F and point C is equal to the distance between point A and point C. The estimated speed calculation means 106 obtains the estimated speed by dividing the distance between the points F and B by the time difference obtained from the time information corresponding to the points A and B.
In this embodiment, except for the case where the vector AB and the straight line BC are parallel, the estimated speed is lower than that in the first embodiment, so that the movement time is longer than that in the first embodiment. Therefore, the frequency of acquisition of terminal location information is suppressed as compared with the first embodiment.

(7) Seventh Embodiment Differences of the seventh embodiment from the first embodiment will be described.
The estimated speed calculation means 106 determines whether or not the mobile terminal 10 is approaching the destination based on the stored contents of the positioning history storage means 104, and moves away from the case where the mobile terminal 10 is approaching the destination. The weighting for the estimated speed is different depending on the case. Specifically, it is as follows.
FIG. 21 is a diagram illustrating the destination and the position of the mobile terminal 10. Point A is the position (previous terminal position) represented by the second most recent terminal position information stored in the positioning history table TB3, and point B is the position (latest terminal position) represented by the latest terminal position information. is there. Point C is a position represented by the destination information stored in the destination table TB2. That is, FIG. 21A shows a case where the mobile terminal 10 is approaching the destination, and FIG. 21B shows a case where the mobile terminal is moving away from the destination.

The estimated speed calculation means 106 determines whether the mobile terminal 10 is approaching or moving away from the destination by the following equation. When Expression (4) is satisfied, it is determined that the mobile terminal 10 is approaching the destination. On the other hand, when Expression (5) is satisfied, it is determined that the mobile terminal 10 is moving away from the destination.
BC + e <(AC−e) × α (where 0 <α <1) Equation (4)
(AC + e) × β <BC-e (where 1 <β) Equation (5)
However,
AC: distance from the last terminal position to the destination BC: distance from the latest terminal position to the destination e: positioning error α, β: coefficient for suppressing erroneous determination

  The estimated speed calculation unit 106 corrects the estimated speed obtained by any one of the methods of the first and sixth embodiments based on the determination result. Specifically, when it is determined that the mobile terminal 10 is approaching the destination, the estimated speed is weighted so as to correct the estimated speed to a larger value. On the other hand, when it is determined that the mobile terminal 10 is moving away from the destination, the estimated measure is weighted so as to correct the estimated speed to a smaller value. For example, the estimated speed may be corrected by multiplying the estimated speed by a predetermined coefficient, or by replacing the estimated speed with a predetermined maximum value or minimum value.

(8) Modifications The present invention may be modified as follows.
(8-1) Modification 1
You may make it use the assumed speed according to the traffic means used for a movement.
FIG. 17 is a diagram illustrating the assumed speed table TB5. In this example, the positions of the mobile terminals in the three records are the same, but different transportation means are associated with each. As a result of the positioning, if it is determined that the mobile terminal is located at the position, the user is allowed to select one of the transportation means associated with the position, and the assumed speed associated with the selected transportation means is assumed. If it reads from speed table TB5, since a process is performed using the assumed speed corresponding to the means of transportation which a user actually uses, the timing of position determination can be optimized.

(8-2) Modification 2
A means for updating the assumed speed may be provided in the position determination device. For example, the user may be configured to specify the assumed speed. In this way, when the position determination timing tends to be delayed, the position determination timing can be advanced by changing the assumed speed to a larger value.
Further, the assumed speed may be updated using the calculated estimated speed. For example, every time the estimated speed is calculated, the estimated speed is written in the positioning history table. The average value of the estimated speed for each position is calculated at a timing designated by the user or periodically, and this average value is written in the assumed speed table. In this way, the estimated speed can be brought close to the actual moving speed, so that the position determination timing can be optimized.

(8-3) Modification 3
In the embodiment, the acquisition unit does not acquire the terminal position information until the movement time or the standby time elapses. If the movement time or the standby time elapses, the acquisition unit acquires the terminal position information. However, for example, until the movement time or the standby time elapses, the acquisition means performs acquisition of the terminal position information every a minute. When the movement time or the standby time elapses, every b minutes (however, You may make it make an acquisition means acquire terminal position information to b <a). In short, the acquisition frequency of the terminal position information before the movement time or the standby time elapses may be lower than the acquisition frequency of the terminal position information after the movement time or the standby time elapses.

(8-4) Modification 4
In the embodiment, the example in which the function of the position determination device is provided in the mobile terminal 10 has been described. However, the function of the position determination device is provided in a device different from the mobile terminal 10, and the mobile terminal 10 and the other device You may make it acquire the effect | action similar to embodiment by communication of. The other apparatus may be, for example, the server 5 or a PC (Personal Computer), a tablet PC, a slate PC, or the like that communicates with the mobile terminal 10 by wireless communication. The wireless communication means may be, for example, a wireless LAN (Local Area Network) such as Wi-Fi (registered trademark) or a communication means that does not use a network such as Bluetooth (registered trademark). As an example, when the function of the position determination device 100 of the first embodiment is provided in the server 5, the mobile terminal 10 transmits the destination information and the base station information to the server 5, and executes the processing after step S 102 to the server 5. What is necessary is just to comprise.
Further, the function of the server 5 may be provided in the mobile terminal 10. That is, the base station table TB1 is stored in the storage unit 12 of the mobile terminal 10, and the acquisition unit 103 reads out the latitude and longitude associated with the base station identifier received from the base station 2 from the base station table TB1. It may be.

(8-5) Modification 5
In various application programs that use terminal location information, the frequency of acquisition of requested terminal location information may vary from application program to application program. Accordingly, the frequency information indicating the frequency of acquisition of the terminal position information required by the application program to be executed is acquired from the application program, and the acquisition frequency of the terminal position information is set based on the acquired frequency information. Good. The application program and the frequency information may be associated with each other and stored in the server 5 or the like, and the frequency information may be acquired from the server 5 or the like.

(8-6) Modification 6
You may combine embodiment and a modification. Moreover, you may combine several embodiment and may combine a some modification. For example, the configuration in which the longer delay time and the movement time in the second embodiment are compared and the longer one is set as the standby time may be combined with the other embodiments. Moreover, you may combine the structure of the determination by the path | route of the mobile terminal in 3rd Embodiment with other embodiment. Further, the configuration of switching the priority positioning means based on the positioning error and the expected value of power consumption in the fourth embodiment may be combined with other embodiments. Further, the configuration of the estimated speed calculation means in the fifth, sixth, and seventh embodiments may be applied to other embodiments.

(8-7) Modification 7
Although an example in which the mobile terminal 10 is a mobile phone has been described in the embodiment, the mobile terminal 10 may be an information processing apparatus such as a so-called personal computer.
In the embodiment, the example in which the control unit of the position determination device controls the operation of the position determination device by executing a program has been described. However, the same function as that of the embodiment may be implemented by hardware. Further, the program may be provided by being recorded on a computer-readable recording medium such as an optical recording medium or a semiconductor memory, and the program may be read from the recording medium and stored in the storage unit of the position determination device. . Further, this program may be provided via a telecommunication line.

DESCRIPTION OF SYMBOLS 1 ... Mobile communication network, 2 ... Base station, 3 ... Switching office, 4 ... Service control station, 5 ... Server, 51 ... Control part, 52 ... Memory | storage part, 53 ... Communication part, 54 ... Operation part, 55 ... Display part , 6 ... gateway exchange, 7 ... communication network, 10 ... mobile terminal, 11 ... control unit, 12 ... storage unit, 13 ... communication unit, 14 ... operation unit, 15 ... display unit, 16 ... voice input / output unit, 17 DESCRIPTION OF SYMBOLS ... Clock part, 100 ... Position determination apparatus, 101 ... Destination setting means, 102 ... Destination storage means, 103 ... Acquisition means, 104 ... Positioning history storage means, 105 ... Distance calculation means, 106 ... Estimated speed calculation means, 107 ... assumed speed storage means, 108 ... travel time calculation means, 109 ... acquisition control means, 110 ... determination means, 111 ... notification means, 200 ... position determination device, 208 ... travel time calculation means, 209 ... acquisition control means, 250 ... Delay time storage means, 300... Position determination device, 308... Travel time calculation means, 310... Determination means, 400... Position determination device, 408 .. Travel time calculation means, 451... Setting means, 452. Value calculating means, 455 ... second switching means

Claims (10)

Destination storage means for storing destination information indicating the position of the destination;
Acquisition means for acquiring terminal position information representing the position of the mobile terminal obtained by positioning;
Positioning history storage means for storing the terminal position information acquired by the acquisition means and time information indicating the time when the terminal position information is acquired in association with each other;
Distance calculating means for calculating a moving distance from the position represented by the terminal position information to the position represented by the destination information;
Estimated speed calculating means for calculating an estimated speed that is an estimated value of the moving speed of the mobile terminal based on the stored contents of the positioning history storage means;
An assumed speed storage means for storing an assumed speed assumed in advance as the moving speed of the mobile terminal;
The estimated speed and the assumed speed are compared to select a larger speed, and based on the selected speed and the moving distance, the destination information is represented from the position represented by the terminal position information. Travel time calculating means for calculating a travel time required for the mobile terminal to move to a position,
An acquisition control means for controlling the acquisition means so that the frequency of acquisition of the terminal position information before the movement time elapses is lower than the frequency of acquisition of the terminal position information after the movement time elapses;
And determining means for determining whether or not the mobile terminal has arrived at the destination based on the position represented by the terminal position information and the position represented by the destination information. Position determination device. Assumed speed update means for updating the assumed speed stored in the assumed speed storage means,
The positioning history storage means stores the estimated speed calculated by the estimated speed calculation means based on the terminal position information in association with the terminal position information,
The position determination apparatus according to claim 1, wherein the assumed speed update unit updates the assumed speed stored in the assumed speed storage unit based on the storage contents of the positioning history storage unit. Delay time storage means for storing an allowable delay time that is allowed when the determination of the arrival of the mobile terminal at the destination is delayed from the arrival of the mobile terminal at the destination;
The acquisition control means compares the allowable delay time and the travel time, sets the longer one as the standby time, and the acquisition frequency of the terminal location information before the standby time elapses indicates that the standby time has elapsed. The position determination apparatus according to claim 1, wherein the acquisition unit is controlled so as to be lower than a frequency of acquisition of terminal position information after being performed. The determination unit reads a plurality of terminal position information in the order of the time represented by the time information from the positioning history storage unit, and a route connecting the plurality of positions represented by the terminal position information in the order of the time is the purpose. 4. The position determination device according to claim 1, wherein the mobile terminal determines that the mobile terminal has arrived at the destination when overlapping with a determination target area including a position represented by the position information. 5. . The acquisition means acquires terminal position information representing the position of the mobile terminal obtained by positioning, and error information representing an error in the terminal position information,
Setting means for setting any of a plurality of positioning means having different positioning methods as priority positioning means used by the acquiring means for acquiring the terminal position information;
A value obtained by performing a predetermined calculation on the movement distance calculated by the distance calculation unit based on the terminal position information acquired from the priority positioning unit is represented by error information acquired from the priority positioning unit. When the error is smaller than the error, terminal position information and error information are acquired from the alternative positioning means that is not the priority positioning means among the plurality of positioning means, and the error represented by the error information acquired from the alternative positioning means is A first switching means for switching the setting by the setting means so that the alternative positioning means becomes the priority positioning means when the error is smaller than the error represented by the error information acquired from the priority positioning means;
For each of the plurality of positioning means, a probability calculating means for calculating a switching occurrence probability that the setting switching by the first switching means occurs when the positioning means is set as the priority positioning means by the setting means;
For each of the plurality of positioning means, based on the power consumption and the switching occurrence probability when the acquisition means acquires the terminal location information from the positioning means, the positioning means is set as the priority positioning means by the setting means. An expected value calculating means for calculating an expected value of power consumption when set;
When the expected power consumption value of the priority positioning means set by the setting means is larger than the expected power consumption value of the alternative positioning means, the setting means causes the alternative positioning means to be a priority positioning means. The position determination device according to claim 1, further comprising: a second switching unit that switches settings. The estimated speed calculation means corrects the estimated speed so that the estimated speed decreases as the deviation between the direction in which the mobile terminal moves and the direction of the destination based on the position of the mobile terminal is large. The position determination apparatus according to claim 1. Destination storage means for storing destination information indicating the position of the destination;
Acquisition means for acquiring terminal position information representing the position of the mobile terminal obtained by positioning, and error information representing an error in the terminal position information;
Positioning history storage means for storing the terminal position information acquired by the acquisition means and time information indicating the time when the terminal position information is acquired in association with each other;
Distance calculating means for calculating a moving distance from the position represented by the terminal position information to the position represented by the destination information;
Estimated speed calculating means for calculating an estimated speed that is an estimated value of the moving speed of the mobile terminal based on the stored contents of the positioning history storage means;
Based on the estimated speed and the moving distance, a moving time calculating means for calculating a moving time required for the mobile terminal to move from the position represented by the terminal position information to the position represented by the destination information When,
An acquisition control means for controlling the acquisition means so that the frequency of acquisition of the terminal position information before the movement time elapses is lower than the frequency of acquisition of the terminal position information after the movement time elapses;
Determining means for determining whether or not the mobile terminal has arrived at the destination based on the position represented by the terminal position information and the position represented by the destination information;
Setting means for setting any of a plurality of positioning means having different positioning methods as priority positioning means used by the acquiring means for acquiring the terminal position information;
A value obtained by performing a predetermined calculation on the movement distance calculated by the distance calculation unit based on the terminal position information acquired from the priority positioning unit is represented by error information acquired from the priority positioning unit. When the error is smaller than the error, terminal position information and error information are acquired from the alternative positioning means that is not the priority positioning means among the plurality of positioning means, and the error represented by the error information acquired from the alternative positioning means is A first switching means for switching the setting by the setting means so that the alternative positioning means becomes the priority positioning means when the error is smaller than the error represented by the error information acquired from the priority positioning means;
For each of the plurality of positioning means, a probability calculating means for calculating a switching occurrence probability that the setting switching by the first switching means occurs when the positioning means is set as the priority positioning means by the setting means;
For each of the plurality of positioning means, based on the power consumption and the switching occurrence probability when the acquisition means acquires the terminal location information from the positioning means, the positioning means is set as the priority positioning means by the setting means. An expected value calculating means for calculating an expected value of power consumption when set;
When the expected power consumption value of the priority positioning means set by the setting means is larger than the expected power consumption value of the alternative positioning means, the setting means causes the alternative positioning means to be a priority positioning means. And a second switching means for switching the setting. Frequency information acquisition means for acquiring frequency information indicating the frequency of acquisition of the terminal location information requested by an application program executed by the mobile terminal;
8. The position determination device according to claim 1, further comprising: a frequency setting unit that sets a frequency of acquisition of the terminal position information by the acquisition unit based on the frequency information. A destination storage step for storing destination information representing the position of the destination;
An acquisition step of acquiring terminal position information representing the position of the mobile terminal obtained by positioning;
A positioning history storage step for storing the terminal position information acquired in the acquisition step and time information indicating the time at which the terminal position information is acquired;
A distance calculating step for calculating a moving distance from the position represented by the terminal position information to the position represented by the destination information;
An estimated speed calculating step for calculating an estimated speed that is an estimated value of the moving speed of the mobile terminal based on the stored contents of the positioning history storing step;
An assumed speed storage step for storing an assumed speed assumed in advance as the moving speed of the mobile terminal;
The estimated speed and the assumed speed are compared to select a larger speed, and based on the selected speed and the moving distance, the destination information is represented from the position represented by the terminal position information. A travel time calculating step for calculating a travel time required for the mobile terminal to move to a position;
Control acquisition of terminal location information in the acquisition step so that the frequency of acquisition of terminal location information before the travel time has elapsed is lower than the frequency of acquisition of terminal location information after the travel time has elapsed. An acquisition control step to
A determination step of determining whether or not the mobile terminal has arrived at the destination based on the position represented by the terminal position information and the position represented by the destination information. Position determination method. A destination storage step for storing destination information representing the position of the destination;
An acquisition step of acquiring terminal position information representing the position of the mobile terminal obtained by positioning and error information representing an error in the terminal position information;
A positioning history storage step for storing the terminal position information acquired in the acquisition step and time information indicating the time at which the terminal position information is acquired;
A distance calculating step for calculating a moving distance from the position represented by the terminal position information to the position represented by the destination information;
An estimated speed calculating step for calculating an estimated speed that is an estimated value of the moving speed of the mobile terminal based on the stored contents of the positioning history storing step;
A travel time calculating step for calculating a travel time required for the mobile terminal to move from a position represented by the terminal position information to a position represented by the destination information based on the estimated speed and the travel distance. When,
Control acquisition of terminal location information in the acquisition step so that the frequency of acquisition of terminal location information before the travel time has elapsed is lower than the frequency of acquisition of terminal location information after the travel time has elapsed. An acquisition control step to
A determination step of determining whether or not the mobile terminal has arrived at the destination based on the position represented by the terminal position information and the position represented by the destination information;
A setting step of setting any one of a plurality of positioning means having different positioning methods as a priority positioning means used for acquiring the terminal position information in the acquiring step;
A value obtained by performing a predetermined calculation on the movement distance calculated in the distance calculation step based on the terminal position information acquired from the priority positioning means is represented by error information acquired from the priority positioning means. When the error is smaller than the error, terminal position information and error information are acquired from the alternative positioning means that is not the priority positioning means among the plurality of positioning means, and the error represented by the error information acquired from the alternative positioning means is A first switching step of switching the setting by the setting step so that the alternative positioning means is the priority positioning means when the error is smaller than the error represented by the error information acquired from the priority positioning means;
For each of the plurality of positioning means, a probability calculating step for calculating a switching occurrence probability that the setting switching by the first switching step occurs when the positioning means is set as a priority positioning means by the setting step;
For each of the plurality of positioning means, based on the power consumption and the switching occurrence probability when the terminal position information is acquired from the positioning means in the acquiring step, the positioning means is used as a priority positioning means by the setting step. An expected value calculating step for calculating an expected value of power consumption when set;
According to the setting step, when the expected power consumption value of the priority positioning means set by the setting step is larger than the expected power consumption value of the alternative positioning means, the alternative positioning means is used as the priority positioning means. A position determining method comprising: a second switching step for switching settings.