JP2010130523A - Server, system and method of estimating communication area - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain where the outside of a range of a mobile communication network is. <P>SOLUTION: A communication area estimation server 20 includes: a reception section 21 for receiving one or a plurality of pieces of signal information on signals from radio signal sources stored by a portable phone 10 positioned outside the range of the mobile communication network N from the portable phone 10 when the portable phone 10 moves into the range of the mobile communication network N; a calculation section 23 for calculating the position of the portable phone 10 when the portable phone 10 receives the signals corresponding to the signal information, based on one or a plurality of pieces of received signal information; and an estimation section 24 for estimating the position outside the range of the mobile communication network N, based on the calculated position of the portable phone 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a communication area estimation server, a communication area estimation system, and a communication area estimation method for estimating a position outside a service area of a mobile communication network.

Conventionally, techniques for measuring the position of a mobile device are known. As a positioning method, a positioning method using only signals from multiple GPS (Global Positioning System) satellites, positioning using signals from GPS satellites and signals from base stations of mobile communication networks And a method of performing positioning using only a signal from a base station (hybrid positioning). For example, Patent Document 1 below describes a wireless position measurement method that realizes so-called hybrid positioning. This method measures the reception timing of the GPS signal or cellular signal using the GPS information necessary for capturing the GPS signal or the cellular information necessary for capturing the cellular signal. The position of the terminal is obtained from the information on the cellular base station held in (1).
JP 2005-20216 A

  The location of a mobile device cannot be measured using the method described in Patent Document 1 or the like in places where a signal from a GPS satellite and a signal from a base station cannot be received, such as behind a building in a city center or indoors. . As a mobile communication service provider, it is desirable to expand the area where positioning is possible by managing its own base station (for example, setting up a new base station or changing the setting of an existing station). Need to know where the mobile communication network is out of range.

  The present invention has been made to solve the above-described problem, and provides a communication area estimation server, a communication area estimation system, and a communication area estimation method capable of grasping where the mobile communication network is out of range. The purpose is to do.

  The communication area estimation server according to the present invention stores one or a plurality of signal information relating to a signal from a radio signal source stored in a mobile device located outside the mobile communication network, and the mobile device includes the mobile communication network. Receiving means for receiving from the mobile device when moving within the area of the mobile station, and the mobile device when the mobile device receives a signal corresponding to the signal information based on one or more signal information received by the receiving means Calculating means for calculating the position of the mobile communication network, and estimating means for estimating a position outside the mobile communication network based on the position of the mobile device calculated by the calculating means.

  The communication area estimation system of the present invention is a communication area estimation system including a mobile device and a communication area estimation server, and stores a radio signal stored when the mobile device is located outside the mobile communication network area. Transmission means for transmitting one or a plurality of signal information relating to a signal from the source to the communication area estimation server when moving within the area of the mobile communication network, wherein the communication area estimation server is transmitted by the transmission means Based on receiving means for receiving a plurality of signal information and one or more pieces of signal information received by the receiving means, the position of the mobile equipment when the mobile equipment receives a signal corresponding to the signal information is calculated. A calculation unit; and an estimation unit configured to estimate a position that is out of range of the mobile communication network based on the position of the mobile device calculated by the calculation unit.

  The communication area estimation method of the present invention is a communication area estimation method executed by a communication area estimation server, and is a signal from a radio signal source stored in a mobile station located outside the mobile communication network. One or more signal information related to the mobile device based on the reception step of receiving from the mobile device when the mobile device has moved into the mobile communication network, and the one or more signal information received in the reception step, A calculation step for calculating a position of the mobile device when the mobile device receives a signal corresponding to the signal information, and a position outside the mobile communication network based on the position of the mobile device calculated in the calculation step Estimating.

  According to such a communication area estimation server, communication area estimation system, and communication area estimation method, when a mobile device moves from outside the mobile communication network to within the mobile communication network, the mobile device is located outside the mobile communication network. The signal information stored at the time of reception is received by the communication area estimation server. Then, the position of the mobile device when a signal corresponding to the signal information is received is calculated, and based on the calculated position of the mobile device, it is estimated where the mobile communication network is out of range. Thus, by using the signal information when the mobile device is located outside the mobile communication network, it is possible to know where the mobile device is out of the mobile communication network.

  In the communication area estimation server according to the present invention, the signal information is information related to a signal received when the mobile device is located outside the mobile communication network, and the calculation unit corresponds to each of the one or more signal information. The position of the wireless signal source is acquired, the average of the one or more positions is calculated as the position of the mobile device, and the estimation means is a circle whose center is the position of the mobile device calculated by the calculation means and whose radius is a predetermined value. It is preferable to estimate that the inside is out of the range of the mobile communication network.

  In this case, first, the position of the radio signal source is calculated from the signal information corresponding to the signal received when the mobile station is located outside the mobile communication network, and then the average of the radio signal source positions is the position of the mobile station. Is calculated as And it is estimated that the inside of the circle centering on the position of the mobile device is outside the area of the mobile communication network. In this way, when the mobile device is located outside the service area of the mobile communication network, it is possible to perform estimation with higher accuracy by estimating the predetermined range centered on the position as the out-of-service area.

  In the communication area estimation server of the present invention, it is preferable that the calculating means calculates an arithmetic average of the positions of one or a plurality of radio signal sources as the position of the mobile device.

  In this case, since the position of the mobile device is calculated using an arithmetic mean, the calculation process is simple.

  In the communication area estimation server of the present invention, it is preferable that the signal information includes the reception intensity, and the calculation means calculates a weighted average obtained by weighting the positions of one or a plurality of radio signal sources with the reception intensity as the position of the mobile device.

  In this case, since the position of the mobile device is calculated using the weighted average based on the reception intensity, the position of the mobile device can be calculated with higher accuracy, and as a result, the accuracy of estimation of the out-of-service area can be improved.

  In the communication area estimation server of the present invention, the signal information is information related to the signal received immediately before the mobile device moves out of the mobile communication network, and the calculation means stores the signal information stored in a predetermined database. And the positioning data in which the position coordinates are associated with one or a plurality of signal information, the position coordinates corresponding to the one or more signal information are calculated as the position of the mobile device, and the estimation means calculates It is preferable to estimate that the position of the mobile device calculated by the means is the boundary of the out-of-service area of the mobile communication network.

  In this case, the position of the mobile device is calculated by comparing the signal information of the signal received immediately before the mobile device moves out of the mobile communication network and the positioning data, and the calculated position is the out-of-service area. Presumed to be a boundary. As described above, by using the signal information of the signal received when the mobile device moves from the outside of the area to the outside of the area, it is possible to estimate the boundary of the area covered by the mobile communication network.

  In the communication area estimation server of the present invention, the radio signal source preferably includes a base station of the mobile communication network and another radio signal source different from the base station.

  In this case, since the mobile device can receive not only signals from the base station of the mobile communication network but also signals from other wireless signal sources, the signal can be used for calculating the position of the mobile device and estimating the out-of-service area. The number and type of information increases. As a result, the accuracy of estimation of the out-of-service area can be improved.

  According to such a communication area estimation server, a communication area estimation system, and a communication area estimation method, the position of the mobile device is calculated using signal information when the mobile device is located outside the mobile communication network, Since the position that is out of the mobile communication network is estimated from the calculated position, it is possible to grasp where the mobile communication network is out of range.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  First, the configuration of the communication area estimation system according to the embodiment will be described with reference to FIGS. FIG. 1 is a diagram showing an overall configuration of a communication area estimation system 1. FIG. 2 is a diagram showing a hardware configuration of the mobile phone 10 shown in FIG. FIG. 3 is a diagram showing a hardware configuration of the communication area estimation server 20 shown in FIG.

  The communication area estimation system 1 is a computer system that estimates where in the mobile communication network N is out of range. The communication area estimation system 1 includes a mobile phone 10 and a communication area estimation server 20.

  The mobile phone 10 is a mobile device that performs call connection, data communication, and the like by transmitting and receiving signals (radio waves) to and from the base station B that constitutes the mobile communication network N. The cellular phone 10 can also receive a signal from another radio signal source (in other words, another radio signal source existing outside the mobile communication network N) S different from the base station B. Here, as another radio signal source S, for example, a base station of a mobile communication network of another communication carrier realized by the same standard as the mobile communication network N or a broadcast wave of terrestrial digital broadcasting is transmitted. However, the present invention is not limited to these. The base station B of the mobile communication network N is also a kind of radio signal source.

  In FIG. 1, one mobile phone 10, one base station B, and one other wireless signal source S are shown for simplicity of explanation, but a plurality of these may exist.

  The cellular phone 10 includes a measurement unit 11, a storage unit 12, and a transmission unit (transmission unit) 13 as functional components.

  As shown in FIG. 2, the cellular phone 10 includes a CPU 101 that executes an operating system, application programs, and the like, a main storage unit 102 that includes a ROM and a RAM, an auxiliary storage unit 103 that includes a memory, A communication control unit 104 that performs data communication via the mobile communication network N, a display unit 105 that includes a liquid crystal monitor and the like, and an operation unit 106 that includes input keys and the like. Each function shown in FIG. 1 reads predetermined software on the CPU 101 and the main storage unit 102, operates the communication control unit 104 under the control of the CPU 101, and controls the main storage unit 102 and the auxiliary storage unit 103. This is realized by reading and writing data.

  The measurement unit 11 is a part that measures and analyzes a signal received from a wireless signal source. The measurement unit 11 measures the reception intensity of a signal received from the base station B or another radio signal source S, and extracts a signal source ID for identifying the radio signal source from the received signal. Moreover, the measurement part 11 measures measurement time and round trip delay time (Round Trip Time (RTT)).

  Further, the measurement unit 11 determines whether or not the mobile phone 10 is located outside the mobile communication network N, and if it is out of the service area, the state is identified by the mode NO. Specifically, when the reception intensity of the signal received from the base station B does not reach the communicable intensity, the measurement unit 11 indicates that the mobile phone 10 is in the out-of-service mode 1 (mode NO = 1). judge. If no signal can be received from the base station B, the measuring unit 11 determines that the mobile phone 10 is in the out-of-service mode 2 (mode NO = 2). As described above, when the mobile phone 10 is located outside the service area, the reception strength of the signal received by the mobile phone 10 from the base station B does not reach a communicable strength, or the mobile phone 10 is not connected to the base station. This means that the mobile phone 10 cannot communicate via the mobile communication network N because the signal from B cannot be received at all.

  In the case of the out-of-service mode 1, the measurement unit 11 performs the mode NO “1”, the signal source ID, the reception intensity, the RTT, and the measurement on the signal received from the wireless signal source when the mobile phone 10 is located outside the service area. Signal information is generated by associating time. On the other hand, in the case of out-of-service mode 2, the measurement unit 11 sets the mode NO “2” for the signal received last when the mobile phone 10 is located in the service area (the signal received immediately before moving out of service). The signal information is generated by associating the signal source ID, the reception intensity, the RTT, and the measurement time.

  The measurement unit 11 outputs the generated signal information to the storage unit 12. Since the mobile phone 10 can receive signals from one or more wireless signal sources at the same time, the measurement unit 11 outputs one or more signal information having the same measurement time to the storage unit 12.

  The memory | storage part 12 is a part which memorize | stores the signal information regarding the signal from a radio signal source. The storage unit 12 accumulates signal information input from the measurement unit 11 as needed. As described above, the signal information stored in the storage unit 12 is generated when the mobile phone 10 is located outside the mobile communication network N.

  The transmission unit 13 transmits the signal information related to the signal from the radio signal source stored when the mobile communication network N is located outside the mobile communication network N to the communication area estimation server 20 when moving to the mobile communication network N. It is a part to do. When it is detected that the mobile phone 10 has entered the mobile communication network N, the transmission unit 13 reads the signal information stored in the storage unit 12 and transmits it to the communication area estimation server 20.

  Next, the communication area estimation server 20 will be described. The communication area estimation server 20 includes a receiving unit (receiving unit) 21, a storage unit 22, a calculating unit (calculating unit) 23, and an estimating unit (estimating unit) 24 as functional components.

  As shown in FIG. 3, the communication area estimation server 20 includes a CPU 201 that executes an operating system, an application program, and the like, a main storage unit 202 that includes a ROM and a RAM, an auxiliary storage unit 203 that includes a hard disk, and the like. A communication control unit 204 such as a network card, an input unit 205 such as a keyboard and a mouse, and an output unit 206 such as a monitor and a printer. Each function of the communication area estimation server 20 reads predetermined software on the CPU 201 and the main storage unit 202, operates the communication control unit 204 under the control of the CPU 201, and operates in the main storage unit 202 and the auxiliary storage unit 203. This is realized by reading and writing data.

  The receiving unit 21 is a part that receives signal information transmitted by the transmitting unit 13 of the mobile phone 10. The receiving unit 21 outputs the received one or more pieces of signal information to the storage unit 22.

  The storage unit 22 is a part that stores the signal information input from the receiving unit 21. The storage unit 22 accumulates signal information input from the receiving unit 21 as needed.

  The calculation unit 23 is a part that calculates the position of the mobile phone 10 when the mobile phone 10 receives a signal corresponding to the signal information based on the signal information received by the receiving unit 21. The calculation unit 23 can use a plurality of methods to calculate the position of the mobile phone 10.

When calculating from the signal information in the out-of-service mode 1, the calculation unit 23 first reads one or more signal information received by the mobile phone 10 at the same time from the storage unit 22, and obtains one or more signal source IDs. get. Subsequently, the calculation unit 23 reads the position coordinates (x _n , y _n ) of the wireless signal source corresponding to each signal source ID. For this purpose, the calculation unit 23 accesses a database (not shown) that stores data in which the signal source ID and the position coordinates are associated with each other. This database may be mounted on the communication area estimation server 20 or may be mounted on another device.

ここで、Ｎは無線信号源の数である。 Subsequently, the calculation unit 23 calculates the position (X, Y) of the mobile phone 10 by calculating an arithmetic average or a weighted average of the position coordinates. When the arithmetic mean is used, the calculation unit 23 uses the following formula (1).

Here, N is the number of radio signal sources.

ここで、Ｎは無線信号源の数であり、Ｌ_ｎは受信強度である。 On the other hand, when using a weighted average (a technique of weighting according to reception intensity), the calculation unit 23 uses the following equation (2).

Here, N is the number of radio signal sources, and L _n is the reception intensity.

  When calculating the position of the mobile phone 10 from the out-of-service mode 2 signal information, the calculation unit 23 first reads one or more pieces of signal information received by the mobile phone 10 at the same time from the storage unit 22. Subsequently, the calculation unit 23 specifies the position of the mobile phone 10 using a positioning database (not shown) used for positioning of the mobile phone 10. The positioning database stores positioning data in which a signal source ID for identifying a wireless signal source, reception intensity, and position coordinates are associated with each other. If there is positioning data in which one position coordinate is associated with information (signal source ID and reception intensity) regarding a plurality of wireless signal sources, one position coordinate is associated with one wireless signal source. There may be some positioning data. Note that the positioning database may be mounted on the communication area estimation server 20 or may be mounted on another device.

  The calculation unit 23 collates one or a plurality of signal information read from the storage unit 22 with positioning data stored in the positioning database. Then, the calculation unit 23 calculates the position coordinates included in the positioning data corresponding to the read signal information as the position (X, Y) of the mobile phone 10.

  The calculation unit 23 outputs the position coordinates of the mobile phone 10 calculated by the above method to the estimation unit 24. Note that the calculation method used by the calculation unit 23 is not limited to the above. For example, the calculation unit 23 may calculate the approximate terminal distance and terminal direction from the reception intensity, sector ID, and the like using signal information about the signal source with the maximum reception intensity. In this case, the calculation unit 23 stores a predetermined propagation model in advance, and calculates the position of the mobile phone 10 using the model.

  The estimation unit 24 is a part that estimates a position outside the mobile communication network N based on the position of the mobile phone 10 calculated by the calculation unit 23. The estimation unit 24 stores the estimation result in a predetermined database (not shown). But the estimation part 24 may output an estimation result to a display or a printer.

  When the position coordinate (X, Y) input from the calculation unit 23 is calculated from the signal information of the out-of-service mode 1, the estimation unit 24 uses the radius centered on the position coordinate (X, Y). It is estimated that the inside of the circle of R is outside the range of the mobile communication network N. Note that the estimation unit 24 stores a value R in advance for this processing. Then, the estimation unit 24 associates the area ID for identifying the out-of-service area, the center coordinates (X, Y) of the area, the measurement time corresponding to the coordinates, and the signal information used for calculating the coordinates, Store as an estimation result.

  When the position coordinate (X, Y) input from the calculation unit 23 is calculated from the signal information in the out-of-range mode 2, the estimation unit 24 indicates that the position coordinate (X, Y) is the boundary of the out-of-range area. It is estimated that. Then, the estimation unit 24 associates the boundary ID for identifying the boundary, the position coordinates (X, Y), the measurement time corresponding to the coordinates, and the signal information used to calculate the coordinates, and stores them as an estimation result. To do. In addition to such processing, the calculation unit 23 may calculate and store an average value of a plurality of position coordinates (X, Y) estimated as a boundary as the center coordinates of the out-of-service area, or is estimated as a boundary. Alternatively, a line connecting a plurality of position coordinates (X, Y) may be calculated and stored as a boundary line of the out-of-service area.

  Next, the operation of the communication area estimation system 1 shown in FIG. 1 will be described using FIGS. 4 to 5 and the communication area estimation method according to the present embodiment will be described. FIG. 4 is a flowchart showing the operation of the mobile phone 10. FIG. 5 is a flowchart showing the operation of the communication area estimation server 20.

  First, the operation of the mobile phone 10 will be described with reference to FIG. First, when the measurement unit 11 determines that the mobile phone 10 is located outside the service area (step S11; YES), signal information is generated. Specifically, when the signal from the wireless signal source can be received (step S12; YES), the measurement unit 11 generates the signal information of the out-of-service mode 1 by analyzing the received signal, and the storage unit 12 (Step S13). On the other hand, when the signal cannot be received from the wireless signal source (step S12; NO), the measurement unit 11 analyzes the signal received last (the signal received immediately before) when the mobile phone 10 is in the range. As a result, signal information for the out-of-service mode 2 is generated and stored in the storage unit 12 (step S14).

  Thereafter, when the mobile phone 10 moves into the mobile communication network N (step S15; YES), the transmission unit 13 transmits the signal information stored in the storage unit 12 to the communication area estimation server 20 (step S16). .

  Next, the operation of the communication area estimation server 20 will be described with reference to FIG. First, the receiving unit 21 receives signal information from the mobile phone 10 and stores it in the storage unit 22 (step S21, receiving step). Subsequent calculation and estimation processing depend on the type of signal information.

  When processing is performed using the signal information in the out-of-service mode 1 (step S22; out-of-service mode 1), the calculation unit 23 uses the value obtained by the arithmetic average or the weighted average of the position coordinates of the wireless signal source. The position coordinates are calculated as (Step S23, calculation step). Subsequently, the estimation unit 24 estimates that the circle with the radius R centered on the position coordinates of the mobile phone 10 is outside the range of the mobile communication network N (step S24, estimation step).

  On the other hand, when processing is performed using the signal information in the out-of-service mode 2 (step S22; out-of-service mode 2), the calculation unit 23 sets the position coordinates of the positioning data corresponding to the signal information to the position of the mobile phone 10. The coordinates are calculated (step S25, calculation step). Subsequently, the estimation unit 24 estimates that the position of the mobile phone 10 is the boundary of the out-of-service area of the mobile communication network N (step S26, estimation step).

  As described above, according to the present embodiment, when the mobile phone 10 moves from the outside of the mobile communication network N to the inside, the mobile phone 10 is stored when the mobile phone 10 is located outside the mobile communication network N. The received signal information is received by the communication area estimation server 20. Then, the position of the mobile phone 10 when the signal corresponding to the signal information is received is calculated, and based on the calculated position, it is estimated where the mobile communication network N is out of range. Thus, by using the signal information when the mobile phone 10 is located outside the mobile communication network N, it is possible to know where the mobile phone 10 is out of the mobile communication network N.

  Specifically, the position of the radio signal source is calculated from the signal information corresponding to the signal received when the mobile phone 10 is located outside the mobile communication network N, and the average of the positions of the radio signal sources is then calculated as the mobile phone. Calculated as 10 positions. Then, it is estimated that the inside of the circle centered on the position of the mobile phone 10 is outside the mobile communication network N. In this way, when the mobile phone 10 is located outside the mobile communication network N, it is possible to perform estimation with higher accuracy by estimating a predetermined range centered on the position as the out-of-service area.

  At this time, if the position of the mobile phone 10 is calculated using the arithmetic mean, the calculation process is simple. Further, if the position of the mobile phone 10 is calculated using the weighted average based on the reception intensity, the position of the mobile phone 10 can be calculated with higher accuracy, and as a result, the accuracy of estimation of the out-of-service area can be improved.

  Further, according to the present embodiment, the position of the mobile phone 10 is calculated by collating the signal information of the signal received immediately before the mobile phone 10 moves out of the mobile communication network N and the positioning data. The calculated position is estimated to be the boundary of the out-of-service area. As described above, by using the signal information of the signal received when the mobile phone 10 moves from the outside of the area to the outside of the area, the boundary of the area covered by the mobile communication network N can be estimated.

  In addition, according to the present embodiment, the mobile phone 10 can receive not only signals from the base station B of the mobile communication network N but also signals from other radio signal sources S. The number and types of signal information that can be used for calculation and estimation of out-of-service area increases. As a result, the accuracy of estimation of the out-of-service area can be improved.

  The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above embodiment. The present invention can be modified in various ways as described below without departing from the scope of the invention.

  In the above embodiment, the boundary of the out-of-service area is estimated using the signal information of the signal received immediately before the mobile phone 10 moves out of the mobile communication network N, but the signal used for the estimation of the boundary is not limited to this. . Specifically, the boundary of the out-of-service area may be estimated using the signal information of the signal received immediately after the mobile phone 10 moves from the outside of the mobile communication network N to the inside of the service area.

  In the above embodiment, the communication area estimation server 20 uses both out-of-service mode 1 signal information and out-of-service mode 2 signal information. However, the communication area estimation server 20 uses only one of the signal information to perform mobile communication. You may estimate the position outside the network.

  In each of the above embodiments, a mobile phone has been exemplified as the mobile device, but other mobile devices such as a personal digital assistant (PDA) may be used.

It is a figure which shows the whole structure of the communication area estimation system which concerns on embodiment. It is a figure which shows the hardware constitutions of the mobile telephone shown in FIG. It is a figure which shows the hardware constitutions of the communication area estimation server shown in FIG. 3 is a flowchart showing an operation of the mobile phone shown in FIG. It is a flowchart which shows operation | movement of the communication area estimation server shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Communication area estimation system, 10 ... Mobile telephone (mobile device), 11 ... Measurement part, 12 ... Memory | storage part, 13 ... Transmission part (transmission means), 20 ... Communication area estimation server, 21 ... Reception part (reception means) , 22 ... storage unit, 23 ... calculation unit (calculation unit), 24 ... estimation unit (estimation unit), B ... base station, N ... mobile communication network, S ... other radio signal source.

Claims (8)

One or more pieces of signal information related to a signal from a radio signal source stored in a mobile station located outside the mobile communication network are stored in the mobile communication network when the mobile apparatus moves into the mobile communication network. Receiving means for receiving from,
Calculation means for calculating the position of the mobile device when the mobile device receives a signal corresponding to the signal information based on one or more signal information received by the receiving means;
Estimating means for estimating a position that is out of range of the mobile communication network based on the position of the mobile device calculated by the calculating means;
A communication area estimation server comprising: The signal information is information related to a signal received when the mobile device is located outside the range of the mobile communication network;
The calculation means obtains the position of the corresponding radio signal source for each of the one or more signal information, and calculates the average of the one or more positions as the position of the mobile device,
The estimating means estimates that a circle centered on the position of the mobile device calculated by the calculating means and having a predetermined value as a radius is outside the area of the mobile communication network;
The communication area estimation server according to claim 1. The calculating means calculates an arithmetic mean of the positions of the one or more wireless signal sources as the position of the mobile device;
The communication area estimation server according to claim 2. The signal information includes received strength;
The calculation means calculates a weighted average obtained by weighting the position of the one or more radio signal sources with the reception intensity as the position of the mobile device,
The communication area estimation server according to claim 2. The signal information is information relating to a signal received immediately before the mobile device moves out of the range of the mobile communication network;
The calculation means matches the one or more signal information by collating the positioning data associated with the signal information and position coordinates stored in a predetermined database with the one or more signal information. To calculate the position coordinates as the position of the mobile device,
The estimating means estimates that the position of the mobile device calculated by the calculating means is a boundary of an out-of-service area of the mobile communication network;
The communication area estimation server according to any one of claims 1 to 4. The radio signal source includes a base station of the mobile communication network and another radio signal source different from the base station;
The communication area estimation server according to any one of claims 1 to 5. A communication area estimation system comprising a mobile device and a communication area estimation server,
The mobile device is
Transmission for transmitting one or a plurality of signal information relating to a signal from a radio signal source stored when the mobile communication network is located outside the service area to the communication area estimation server when moving within the mobile communication network With means,
The communication area estimation server is
Receiving means for receiving one or more signal information transmitted by the transmitting means;
Calculation means for calculating the position of the mobile device when the mobile device receives a signal corresponding to the signal information based on one or more signal information received by the receiving means;
Estimating means for estimating a position that is out of range of the mobile communication network based on the position of the mobile device calculated by the calculating means;
Comprising
Communication area estimation system. A communication area estimation method executed by a communication area estimation server,
One or more pieces of signal information related to a signal from a radio signal source stored in a mobile station located outside the mobile communication network are stored in the mobile communication network when the mobile apparatus moves into the mobile communication network. Receiving step to receive from,
A calculation step of calculating a position of the mobile device when the mobile device receives a signal corresponding to the signal information based on one or a plurality of signal information received in the reception step;
An estimation step for estimating a position that is out of range of the mobile communication network based on the position of the mobile device calculated in the calculation step;
A communication area estimation method including:

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