JP2019075747A - Mobile terminal - Google Patents

Abstract

To provide a technique capable of appropriately transmitting position information of a mobile terminal so as to make individual identification difficult.SOLUTION: A mobile terminal 22 capable of acquiring information that expresses position of an own terminal includes: a storage section 28 for storing position information of an own terminal and an acquisition time when the position information is acquired; a control section 30 for controlling transmission of position information and acquisition time; a transmission section 38 for transmitting stored position information and acquisition times by a predetermined transmission period; and a transmission limit section 36 for limiting transmission of position information and acquisition time when an own terminal is in a residence state.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a mobile terminal that transmits position information of its own terminal to a server device.

  The trip data processing device disclosed in Patent Document 1 acquires position information from a portable terminal or a car navigation device, extracts a route from the position information, and is separated from each of the route departure point and arrival point by a predetermined distance. The position is determined as the start point and the end point, and the path between the start point and the end point is output as output path information.

JP, 2015-103025, A

  In the technology of Patent Document 1, since the processing device acquires all the position information from the portable terminal or the car navigation device, a voice is concerned that an individual may be identified depending on the usage mode of the processing device. There is.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a technology that can appropriately transmit the location information of a mobile terminal to make personal identification difficult.

  In order to solve the above problems, a mobile terminal according to an aspect of the present invention is a mobile terminal capable of acquiring information indicating the position of the own terminal, and stores the position information of the own terminal and the acquisition time at which the position information is acquired. And a control unit that controls transmission of position information and acquisition time. The control unit has a transmission unit that transmits the accumulated position information and acquisition time in a predetermined transmission cycle, and a transmission restriction unit that restricts transmission of the position information and acquisition time by the transmission unit. The transmission restriction unit restricts transmission of the position information and the acquisition time by the transmission unit when it is determined that the own terminal is in the stagnation state based on the position information and the acquisition time.

  According to this aspect, it is possible to suppress transmission of position information of an individual's home or work location by limiting transmission of position information and acquisition time when the mobile terminal is in a stagnation state.

  According to the present invention, it is possible to provide a technology capable of making it difficult to identify an individual by appropriately transmitting position information of a mobile terminal.

It is a figure for demonstrating the system to which a mobile terminal transmits a positional information to a server apparatus. It is a figure for demonstrating the function structure of a server apparatus. It is a figure for demonstrating the transmission process of the positional information in a mobile terminal.

  FIG. 1 is a diagram for explaining a system in which the mobile terminal 22 transmits position information to the server device 24. As shown in FIG. The mobile terminal 22 in the vehicle 10 may be a portable device of a user who is on board. The position information of the mobile terminal 22 may be periodically acquired using a GPS (Global Positioning System), for example, every few seconds.

  Position information and time information of the mobile terminal 22 are transmitted from the mobile terminal 22 in the vehicle 10 to the server device 24 of the data center 12 in a predetermined transmission cycle. The time information indicates the time when the position information was acquired. The predetermined transmission cycle is, for example, every few minutes, but may be set in a range from several seconds to several days. The mobile terminal 22 collectively transmits the accumulated position information to the server device 24. However, the mobile terminal 22 may transmit the position information to the server device 24 each time the position information is acquired.

  The server device 24 placed in the data center 12 derives route information indicating a route traveled by the user having the mobile terminal 22 based on the position information and time information of the mobile terminal 22. The server device 24 collects route information by acquiring location information from mobile terminals 22 of a plurality of users, and uses the collected route information as traffic analysis, sightseeing trend analysis, and the like as so-called big data. For example, route information of all users living in the same city may be analyzed to predict occurrence of traffic congestion.

  In FIG. 1, it is shown that the user having the mobile terminal 22 is traveling on the route R <b> 1 by the vehicle 10 from the home 14 to the office 16. As another route, the user walks along route R2 from home 14 toward the nearest station 18 at home, and travels along route R3 from the nearest station 18 at home to the nearest station 20 by train which is a vehicle There are also cases in which the route R4 is walked from the nearest station 20 to the office 16 by walking. When the user travels along the route R2 to R4, the moving means is a combination of walking and a vehicle.

  FIG. 2 is a diagram for explaining the functional configuration of the mobile terminal 22. As shown in FIG. In FIG. 2, each element described as a functional block that performs various processing can be configured in hardware as a circuit block, a memory, or another LSI, and software can be loaded in a memory. It is realized by a program etc. Therefore, it is understood by those skilled in the art that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof, and is not limited to any of them.

  The mobile terminal 22 includes an acquisition unit 26, a storage unit 28, and a control unit 30. The acquisition unit 26 acquires GPS information from GPS satellites, and acquires position information and time information of the own terminal. The storage unit 28 stores position information and time information of the own terminal.

  The control unit 30 controls transmission of position information and time information of the mobile terminal 22. The control unit 30 includes a retention determination unit 32, a specification unit 34, a transmission restriction unit 36, and a transmission unit 38.

  The staying determination unit 32 determines whether the mobile terminal 22 is staying based on the position information and time information of the mobile terminal 22, for example, in a determination cycle every one minute. The residence determination unit 32 determines that the mobile terminal 22 is in a stagnation state, assuming that the residence condition is satisfied, when the mobile terminal 22 is stagnated for a predetermined residence time or more, and identifies the stagnation point. The retention point may be a region of a predetermined retention range, and the retention determination unit 32 determines that the mobile terminal 22 is in a retention state, for example, when the mobile terminal 22 is retained for 10 minutes or more within a radius of 50 meters. judge. When the position information of the mobile terminal 22 indicates that the mobile terminal 22 has moved beyond the retention range, the retention determination unit 32 determines that the retention state is not a retention state.

  The identifying unit 34 identifies the type of moving means of the mobile terminal 22 based on the position information and time information of the mobile terminal 22. In the embodiment, the types of moving means are classified into two, for example, walking and vehicles, but may be classified into three: walking, bicycles, and high-speed moving objects such as vehicles.

  The identifying unit 34 calculates the moving speed of the mobile terminal 22 from the position information and time information of the mobile terminal 22, and specifies the type of moving means of the mobile terminal 22 based on the moving speed of the mobile terminal 22. The identification unit 34 identifies the vehicle as a vehicle if the moving means is moving at a predetermined reference speed (for example, 20 kilometers per hour) or more, and the moving means proceeds at a moving speed of 20 kilometers per hour or less. Identify as walking.

  When the moving means is a vehicle, the specifying unit 34 moves the moving speed of the mobile terminal 22 for each of the partial sections so that the moving means is not mistaken as walking because the vehicle is temporarily stopped by a signal or the like. It is preferable to identify the moving means by determining whether the reference speed is exceeded.

  The specifying unit 34 may specify the moving means using the map information and the position information of the mobile terminal 22 in addition to the moving speed of the mobile terminal 22. That is, the specifying unit 34 specifies the moving means based on the moving speed and position information of the mobile terminal 22 and the map information. For example, when the mobile terminal 22 is moving on a track, or when moving on a freeway, the specifying unit 34 may specify that the moving means is a vehicle.

  If the mobile terminal 22 is determined to be in the staying state by the stay determination unit 32, the transmission limiting unit 36 continues to move from the position where the own terminal is staying to the predetermined concealment distance or the predetermined concealment time until the mobile terminal 22 moves. Decide not to send Since the mobile terminal 22 does not transmit the position information staying for a predetermined time or more, it is possible to suppress transmission of position information of an individual's home or work location.

  The transmission restriction unit 36 decides to release the restriction on the transmission of the position information when moving from the position where the own terminal has stayed beyond the predetermined concealment distance or the predetermined concealment time. When the transmission restriction is released, the position information of the own terminal for transmission is transmitted to the server device 24 and accumulated.

  The concealed distance may be set according to the moving means, and the transmission restriction unit 36 sets the concealed distance to 500 meters when the moving means of the mobile terminal 22 is walking, and the concealed distance when the moving means is a vehicle. May be set to 1500 meters. That is, when it is specified that the moving means of the mobile terminal 22 is a vehicle, the transmission restriction unit 36 sets the distance of the mobile terminal 22 to be concealed longer than in the case of being specified as walking. If the means of transportation is walking, it often travels a short distance compared to the vehicle, and if the concealed distance is too long there is a possibility that the usefulness of the data may be reduced, and the distance is set shorter than the vehicle By doing this, it is possible to secure anonymity while securing the usefulness of the data. When the moving means is a vehicle, the moving distance is often long, and the usefulness of the data can be secured even if the concealing distance is increased, and the anonymity can be enhanced.

  The concealment time may be set according to the moving means, and the transmission restriction unit 36 sets the concealment time to 10 minutes when the moving means of the mobile terminal 22 is walking, and the concealment time when the moving means is a vehicle. Set to 5 minutes. That is, when it is specified that the moving means of the mobile terminal 22 is walking, the transmission restriction unit 36 sets the moving time of the mobile terminal 22 to be concealed longer than in the case of being specified as a vehicle. When the transportation means is a vehicle, it travels a long distance in a short time compared to walking, so if the concealment time is too long, the usefulness of the data may decrease, but the length is shorter than walking. Setting the time can enhance the usefulness of the data.

  The transmitting unit 38 transmits the position information and time information of the mobile terminal 22 accumulated for each predetermined transmission cycle to the server device 24, but it is determined that the transmission limiting unit 36 does not transmit the position information. Even if the transmission cycle has been reached, the position information is not transmitted to the server device 24. As a result, it is possible to conceal the position where the mobile terminal 22 stagnates and to make it difficult to specify personal information.

  The transmission cycle of the transmission unit 38 may be set to, for example, a cycle of about 3 to 5 minutes, and may be set according to the type of moving means of the mobile terminal 22. In addition, the transmission unit 38 may set the same time as the predetermined concealment time as the transmission cycle, and transmit the position information and time information of the mobile terminal 22 in the transmission cycle. The transmission cycle of the transmission unit 38 may be equal to or longer than a predetermined residence time for which the residence determination unit 32 determines the residence. By making the transmission cycle of the transmission unit 38 longer than a predetermined residence time, it is possible to determine that the transmission restriction unit 36 is a residence during the transmission cycle.

  FIG. 3 is a diagram for explaining transmission processing of position information at the mobile terminal 22. As shown in FIG. The user having the mobile terminal 22 moves from the first staying position P1 toward the second staying position P2, and stays at the first staying position P1 and the second staying position P2. The transmitting unit 38 of the mobile terminal 22 reaches the predetermined transmission cycle at each of the points C1 to C8, and the position information of the mobile terminal 22 accumulated during the transmission cycle unless transmission is limited by the transmission limiting unit 36. Are sent to the server device 24. In addition, a first concealment range R1 and a second concealment range R2 set by distances are shown around the first dwell position P1 and the second dwell position P2.

  The user having the mobile terminal 22 moves from the first dwell position P1 toward the second dwell position P2. The mobile terminal 22 reaches the transmission cycle at the point C1, but transmission of position information is restricted by the transmission restriction unit 36 until it moves from the first staying position P1 to beyond the first concealment range R1, and the transmission unit 38 The position information is not transmitted to the server device 24 at the point C1. As a result, since the position information in the vicinity of the first staying position P1 is not transmitted to the server device 24, it is possible to make it difficult to specify an individual from the transmitted position information of the mobile terminal 22.

  Since the mobile terminal 22 does not stay at the position P3 beyond the first concealment range R1 and exceeds the first concealment range R1, the transmission limiting unit 36 decides to release the limitation on transmission. When the transmission restriction is released, position information of the transmission mobile terminal 22 is accumulated. The transmitting unit 38 reaches the transmission cycle at the point C2, and transmits the position information accumulated from the position P3 to the point C2 to the server device 24. The transmitting unit 38 also transmits the position information accumulated in each section from the point C3 to the point C7 to the server device 24.

  The staying determination unit 32 determines that the mobile terminal 22 is staying at the second staying position P2, and the transmission limiting unit 36 keeps the position information until the mobile terminal 22 moves beyond the second concealment range R2. Decide not to send. The transmitting unit 38 reaches the transmission cycle at the point C 8 (second staying position P 2), but does not transmit the position information because the transmission of the position information is restricted by the holding determination unit 32. Thereby, the positional information on the mobile terminal 22 from the point C7 is not transmitted, and the positional information on the second staying position P2 can be hidden.

  The transmitting unit 38 may set the timing to start transmitting position information according to the type of moving means of the own terminal. That is, the transmission restriction unit 36 sets the first concealment range R1 according to the type of the moving means. For example, in the case of a vehicle, the transmission restriction unit 36 sets the first concealment range R1 to be large so as to start transmission at a later timing than in the case of walking. This can enhance the secrecy.

  It is to be understood by those skilled in the art that the embodiment is merely an example, and that various modifications can be made to the combination of each component, and such modifications are also within the scope of the present invention.

  Although the embodiment has described the aspect in which the transmission cycle of the transmission unit 38 is 3 minutes, the present invention is not limited to this aspect. For example, the transmission cycle may be one day or one week. In addition, after it is determined that the mobile terminal 22 is staying, the transmitting unit 38 deletes the position information in a predetermined concealment range from the staying position, that is, for each trip, and transmits the remaining position information to the server device. May be sent to 24.

  10 vehicles, 12 data centers, 14 homes, 16 workplaces, 18 home nearest stations, 20 workplace closest stations, 22 mobile terminals, 24 server devices, 26 acquisition units, 28 storage units, 30 control units, 32 retention determination units, 34 identification unit, 36 transmission restriction unit, 38 transmission unit.

Claims (1)

A mobile terminal capable of acquiring information indicating the position of its own terminal,
A storage unit that stores location information of the own terminal and an acquisition time at which the location information is acquired;
A control unit that controls transmission of the position information and the acquisition time;
The control unit
A transmitter configured to transmit the accumulated position information and acquisition time in a predetermined transmission cycle;
A transmission restriction unit that restricts the transmission of the position information and the acquisition time by the transmission unit;
The transmission restriction unit restricts transmission of the position information and the acquisition time by the transmission unit when it is determined that the own terminal is in the staying state based on the position information and the acquisition time Terminal.

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