JP2016048529A - Apparatus, program and method capable of determining stay of user carrying mobile terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus that can estimate a stay situation of a mobile terminal with high accuracy by using positional information concerning a base station without depending on a positioning function of a mobile terminal.SOLUTION: An apparatus of the present invention has: means for determining a comparison object communication record becoming a comparison object, based on day time of communication, every communication record included in the communication history; and means for determining a state of the mobile terminal concerning the communication record of a stay determination object is the stay, when a position concerning the comparison object communication record is contained in a predetermined distance range centering on the position concerning the communication record of the stay determination object. Here, the means for determining the comparison object sequentially traces back the communication record determined to be the stay about the day time from the communication record of the stay determination object, and finds the last communication record where the communication record determined to be the stay is not present before one of itself, and thereby determines that the communication record from this last communication record to the communication record existing before one of the communication record of the stay determination object is the comparison object communication record.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technique for acquiring information related to staying in a user who has a mobile terminal.

  Conventionally, many portable terminals represented by smartphones and tablet computers have a positioning function using a GPS (Global Positioning System), an acceleration sensor, or the like. Currently, there is a technology for transmitting a positioning result by this function to a server of a service provider via a network and deriving a user's action history on the server side.

  On the other hand, the current position of the mobile terminal and the staying time at the position are estimated using communication information between the mobile terminal and the base station acquired on the telecommunications carrier side without using such a positioning function. There are also techniques to do this. In any case, with these technologies, the user can acquire various service information corresponding to the position transmitted by the user from a service provider, a communication provider, or the like.

  As an example of such a technique, in Patent Document 1, position information acquired by a GPS function of a mobile terminal owned by a user is transmitted to a server, and the server calculates an action range based on the action history of the user. However, a technique for providing information reflecting the range of action is disclosed. In this technique, clustering is performed based on the distance between a large number of pieces of position information measured by the mobile terminal, and the action range for each user is calculated.

  Non-Patent Document 1 discloses a technique for learning a position that is significant for a user from an action history based on position information acquired by a GPS function of a mobile terminal possessed by the user. Here, as a first embodiment, the acquired location information for each user is clustered by an improved method of the k-means method, and it is determined whether or not the user is in the stay state based on the total stay time.

  Further, Non-Patent Document 2 discloses a technique for clustering user position information by a clustering method using an infinite mixed Gaussian model on a two-dimensional plane. In this technique, although there is no clear distinction between stay and movement, a position that is significant for the user is extracted.

  Here, the conventional technology described above is based on the premise that the position information of the user can be acquired by the GPS function of the mobile terminal. However, when the GPS function and its application are started up regularly or periodically in the mobile terminal to acquire the position information, not only the battery of the mobile terminal is consumed earlier, but also the amount of packets sent from each mobile terminal is increased. This may increase communication congestion.

  On the other hand, in the technology for estimating the position and time related to the stay of the mobile terminal using the communication information between the mobile terminal and the base station acquired on the telecommunications carrier side, the positioning function on the terminal side having the above problem is provided. do not need. Therefore, it is preferable for the communication carrier to adopt the latter technique. However, the position information acquired via such a base station generally has a feature that the spatial granularity is coarse and the time interval is not constant. As a result, the estimated position error becomes large. Further, in such a situation where a steady positioning result cannot be obtained, it is difficult to estimate a position in a time zone in which the user is not communicating. For example, Patent Document 1 and Non-Patent Document 1 described above. In addition, the solution algorithm described in Non-Patent Document 2 cannot be applied.

  For such a situation, for example, in the technology disclosed in Patent Document 2, the communication carrier side does not rely on the positioning function of the mobile terminal, and the spatial granularity is coarse and the time interval is not constant, but the communication carrier A significant position is estimated using base station position information that can be acquired by equipment.

  Also, in the technology described in Non-Patent Document 3, the telecommunications carrier side uses an agglomeration type clustering method called a leader algorithm for the location information history of the base station under the control of the mobile terminal, so that the user can A significant position is extracted.

  Furthermore, in the technique described in Non-Patent Document 4, the telecommunications carrier side also sets an upper limit value (for example, three times) regarding the number of times the base station is switched during the stay, and stays in a series of time periods that do not exceed this upper limit value. Extracted as time.

  Furthermore, in the technique disclosed in Patent Document 3, the communication carrier side similarly divides the communication history into predetermined time windows (time divisions), and the position probability distribution based on a plurality of base station position information for each time window. To determine “stay” and “movement”. Here, when it is determined as “stay”, clustering is performed on a set having a distance from the representative point that is the center of gravity of a plurality of pieces of position information in each time window, and the position obtained from the result of clustering is the same. It is a place to stay.

JP 2010-49295 A JP 2012-85095 A JP 2014-116808 A

Toyama Midori, Hattori Takashi, Kanno Tatsuya, “Learning Significant Positions Using Cellular Phone Positioning Functions”, IPSJ Transactions, vol.46 No.12, pp.2915-2924, 2005 Petteri Nurmi, Sourav Bhattacharya, "Identifying Meaningful Places: The Non-parametric Way", Pervasive 2008, pp.111-127, 2008 S. Isaacman, R. Becker, R. Caceres, SG Kobourov, M. Martonosi, J. Rowland, and A. Varshavsky, "Identifying Important Places in People's Lives from Cellular Network Data", Proc. Of the 9th International Conference on Pervasive Computing, pp.133-151, 2011 MA Bayir, M. Demirbas, and N. Eagle, `` Mobility profiler: A framework for discovering mobility profiles of cell phone users '', Proc. Of the International Conference on Pervasive and Mobile Computing, vol.6, no.4, pp. 435--454, 2010

  However, in the analysis technique related to the stay on the telecommunications carrier side as described above, there is a problem that the accuracy in the determination result related to the stay is not sufficiently high.

  For example, according to the technology described in Patent Document 2, the time window division (for each time interval) is performed on the history of base station position information that can be acquired by the telecommunications carrier equipment and has a coarse spatial granularity and the time interval is not constant. The significant position is estimated by applying (division) and clustering, and the degree of “stay” at the significant position is evaluated. However, it is difficult to clearly distinguish whether each time section (time window) is “stay” or not, for example, “stay” or “movement”.

  In addition, in the techniques described in Non-Patent Document 3 and Patent Document 2, there is a possibility that the location and time of the stay location may be shifted due to the influence of communication that occurs when moving between the stay locations. That is, there may be a case where the accuracy of the acquired stay position and stay time is not sufficiently high. In particular, in the technique described in Patent Document 2, the staying state is determined after clustering a large number of pieces of position information measured by the base station. As a result, there may be a problem that the accuracy of the location of the staying place is lowered.

  Furthermore, according to the technique described in Non-Patent Document 4, since the location information is not taken into consideration, the staying place before the movement and the staying place after the movement are the same for the mobile terminal that hardly generates communication during the movement. There is a concern that it will be a place to stay. In addition, when base stations are densely arranged in a narrow range, there may be a problem that the stay time is excessively divided.

  Furthermore, in the technique described in Patent Document 3, when there are a plurality of base station position information satisfying the condition of “stay” for each time window, positioning using all base stations is performed and The location is consolidated in one place. As a result, even when the mobile terminal moves between a plurality of base stations included in one time window, there is a concern that it is determined as “stay”. In addition, when there are many base stations that satisfy the “stay” condition in one time window, the amount of calculation increases. Further, the time window is composed of a time width and a shift width, and the shift width is used as a connection between the time width and the time width. Here, since the shift width is a time width that overlaps with the time width, there may actually be a problem that the amount of calculation also increases here.

  Therefore, the present invention uses the location information related to the base station included in the communication history that can be acquired by the telecommunications carrier without relying on the positioning function of the mobile terminal, and the staying status of the user who has the mobile terminal is highly accurate. It is an object of the present invention to provide an apparatus, a program, and a method that can be estimated by the above.

According to the present invention, an apparatus for determining whether the state of a user who has a mobile terminal is staying,
Communication including a plurality of communication records in which, for each mobile terminal, the date and time related to communication is associated with the position of the base station related to communication or position information indicating the position related to the mobile terminal derived based on the position. A communication history storage unit that stores the history;
For each communication record, based on the date and time included in the plurality of communication records, comparison target determining means for determining a comparison target communication record to be compared for the communication record;
When the position indicated by the position information related to the comparison target communication record determined for the stay determination target communication record is included in the predetermined distance range centered on the position indicated by the position information related to the stay determination target communication record, A stay determination unit that determines that the state of the user of the mobile terminal related to the communication record of the stay determination target is stay;
The comparison target determining means sequentially traces the communication record determined as stay from the communication record of the stay determination target in terms of date and time, and the communication record determined as stay does not exist immediately before itself. The communication record from the last communication record to the communication record existing immediately before the stay determination target communication record is determined as the comparison target communication record for the stay determination target communication record. The stay determination apparatus characterized by this is provided.

As one embodiment in the stay determination device of the present invention, the comparison target determining means,
A communication record immediately before a communication record that is a date and time included in a predetermined time range retroactively from a date and time included in one communication record and that corresponds to the date and time immediately before the date and time of this one communication record. Then, starting from the communication record for the stay determination, the communication record is sequentially traced, the communication record immediately before determined as stay is sequentially obtained, and the last communication record without the previous communication record determined as stay is present. From the last communication record to the communication record immediately before determined to be stayed, the communication record to be compared is determined as the comparison target communication record.
A communication record having a date and time included in a time range from a time before a predetermined time included in the communication record of the stay determination target to a time after the elapse of the predetermined time of the date and time is determined as a comparison target communication record. It is also preferable to do.

Moreover, as other embodiment in the stay determination apparatus of this invention, a stay determination apparatus is
About the communication record of the connection determination target determined to be staying, it is the date and time included in the predetermined maximum waiting time range retroactively from the date and time included in the communication record of the connection determination target, and the communication record of the connection determination target There is a communication record having a date and time corresponding to the previous date and time, and the position indicated by the position information related to the previous communication record is the position indicated by the position information related to the communication record to be connected A link determination means for setting a link flag on the communication record of the link determination target,
When arranging the communication records subjected to the connection determination in the time series of the date and time included in the communication record, the communication record determined to be the first stay is assigned a stay location identifier that identifies the stay location, For each communication record in chronological order, the stay determination status and the connection determination status are checked, and with respect to the communication record that has been determined to be a stay but the connection flag is not set, It is also preferable to further have a stay place specifying means for assigning different stay place identifiers.

  Furthermore, as still another embodiment of the stay determination device of the present invention, the stay determination device provides the stay location in time series order of date and time included in the stay location grant communication record to which the stay location identifier is assigned. Regarding the transition of the base station related to the communication record in the time series, when a number of different base stations exceeding the predetermined maximum number of base stations appear, counting from the base station related to the location grant communication record to be positioned, From the stay location grant communication record of the positioning target to the stay location grant communication record that is one before the stay location grant communication record in which the last base station appeared when the predetermined maximum number of base stations is exceeded In the meantime, if different base stations of the predetermined maximum number of base stations appear alternately or not continuously, the location-attached communication record for the positioning target Stay land position with, it is also preferable to further include a stay land position determining means to the results of the performed positioning using different base stations of the predetermined maximum number of base stations.

In the embodiment having the above-mentioned stay location determining means,
The communication history storage means includes, for each portable terminal, a communication history including a plurality of communication records in which date and time related to communication, position information of a base station related to communication, and signal strength or round-trip delay time related to communication are associated with each other. Accumulate
The stay location determining means uses the location information and signal strength or round trip delay time calculated for different base stations of the predetermined maximum number of base stations as the location target communication record for the positioning target. It is also preferable to set the location of the place of stay. Here, the predetermined maximum number of base stations is preferably set to a smaller value in advance as the position of stay in a narrower area is obtained.

  Furthermore, as still another embodiment of the stay determination device of the present invention, the stay determination device provides the stay location in time series order of date and time included in the stay location grant communication record to which the stay location identifier is assigned. Regarding the transition of the base station related to the communication record in the time series, a number of different base stations exceeding the predetermined maximum number of base stations appeared, counting from the base station related to the stay location grant communication record corresponding to the start of stay At the time, from the stay location grant communication record corresponding to the start of the stay, the previous stay location grant is given to the stay location grant communication record in which the last base station appears when the predetermined maximum number of base stations is exceeded Corresponding to the start of the stay when different base stations of the predetermined maximum number of base stations appear alternately or discontinuously before the communication record. The start time of the stay time in the stay related to the stay place grant communication record is determined based on the date and time included in the stay place grant communication record corresponding to the start of the stay, and the end time of the stay time is determined as the predetermined maximum It may further comprise a stay time determining means for determining based on the date and time included in the stay location grant communication record immediately preceding the stay location grant communication record in which the last base station exceeding the number of base stations has appeared. preferable.

  Further, in the embodiment having the stay time determining unit, the stay determining unit, when the stay time for which the start time and the end time are determined relates to a single communication record, the portable terminal related to the single communication record It is also preferable that the state of the user is determined to be moving regardless of the previous determination.

  Furthermore, as another embodiment of the stay determination device of the present invention, the stay determination unit relates to the communication record of the stay determination target when it is determined that there is no comparison target communication record for the stay determination target communication record. It is also preferable to determine that the state of the user of the mobile terminal is stay.

According to the present invention, the communication equipment device which is the above-described stay determination device connected to the wide area wireless communication network, in order to store the communication history in the communication history storage unit,
Base station location information managing means for storing a base station identifier and location information indicating the location of the base station or the location of the mobile terminal derived based on the location in association with each other;
A communication record collecting means for collecting a communication record in which a base station connected to a mobile terminal is associated with a base station identifier of the base station and a date and time related to communication for each mobile terminal;
Using the base station position information management means, a communication facility apparatus is provided that further includes position information history generation means for further associating position information corresponding to the base station identifier for each portable terminal with respect to the communication record.

According to the present invention, there is also provided a program for causing a computer installed in a stay determination device to determine whether or not the state of the user possessing the mobile terminal is stay,
The above stay determination device associates, for each mobile terminal, the date and time related to communication and the position of the base station related to communication or position information indicating the position related to the mobile terminal derived based on the position. A communication history storage unit that stores communication history including a plurality of communication records,
This program
For each communication record, based on the date and time included in the plurality of communication records, comparison target determining means for determining a comparison target communication record to be compared for the communication record;
When the position indicated by the position information related to the comparison target communication record determined for the stay determination target communication record is included in the predetermined distance range centered on the position indicated by the position information related to the stay determination target communication record, The computer functions as a stay determination unit that determines that the state of the user of the mobile terminal related to the communication record of the stay determination target is stay,
The comparison target determining means sequentially searches the communication record determined to be staying from the communication record of the stay determination target in terms of date and time, and obtains the last communication record in which the communication record determined to be staying does not exist immediately before itself. The communication record from the last communication record to the communication record existing immediately before the stay determination target communication record is determined as the comparison target communication record for the stay determination target communication record. A stay determination program is provided.

According to the present invention, there is further provided a method for determining stay using a stay determination device that determines whether or not the state of the user possessing the mobile terminal is stay,
The above-described stay determination device includes, for each mobile terminal, a plurality of time-dates related to communication and a position of a base station related to communication or position information indicating a position related to the mobile terminal derived based on the position A communication history storage unit that stores communication history including communication records of
This stay determination method is
For each communication record, based on the date and time included in the plurality of communication records, a first step of determining a comparison target communication record to be compared for the communication record;
When the position indicated by the position information related to the comparison target communication record determined for the stay determination target communication record is included in the predetermined distance range centered on the position indicated by the position information related to the stay determination target communication record, A second step of determining that the state of the user of the mobile terminal related to the communication record of the stay determination target is stay, and sequentially performing the first step and the second step for each communication record,
In the first step, the communication record determined to stay in the second step is sequentially traced from the communication record of the stay determination target in terms of date and time, and the communication record determined to stay in the second step is its own. The last communication record that does not exist immediately before is obtained, and the communication record from the last communication record to the communication record that exists immediately before the stay determination target communication record is compared with the communication record to be compared. There is provided a stay determination method characterized by determining a record.

  According to the apparatus, program, and method of the present invention, a user who possesses a mobile terminal by using location information related to a base station included in a communication history that can be acquired by a telecommunications carrier without relying on a positioning function of the mobile terminal. Can be estimated with high accuracy.

It is a schematic diagram which shows roughly the example of the stay and movement of a portable terminal in real space. It is a functional block diagram which shows the function structure in one Embodiment of the stay determination apparatus by this invention. It is a table which shows one Example of the setting file managed by the setting file management part. It is a table which shows one Example of the base station information file managed by the base station position information management part. It is a table which shows one Example of the communication history managed by the communication record collection part. It is a table which shows one Example of the base station information merge communication log | history produced | generated by the position information log | history production | generation part. It is a table for demonstrating one Embodiment of the process in a comparison object determination part and a stay determination part. It is a flowchart which shows one Embodiment of the process in a comparison object determination part and a stay determination part. It is a table for demonstrating one Embodiment of the process in a connection determination part and a stay place specific | specification part. It is a flowchart which shows one Embodiment of the process in a connection determination part. It is a table for demonstrating one Embodiment of the process in a stay place position determination part. It is a schematic diagram which shows one Example which concerns on selection of the base station utilized for a positioning. It is a flowchart which shows one Embodiment of the process in a stay place position determination part. It is a table explaining other embodiment about the positioning implemented using a some base station. It is a schematic diagram for demonstrating other embodiment about the positioning implemented using a some base station. It is a flowchart which shows one Embodiment of the process in a stay time determination part. It is a schematic diagram which shows the aspect of positioning according to the number of base stations to be used.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram schematically illustrating an example of stay and movement of a mobile terminal in a real space.

  According to FIG. 1, a user who has a mobile terminal 2, such as a mobile phone, a smartphone, a tablet computer, or a wearable terminal, includes walking and train use from the time he is at home to the time when he is in the office of the company. Repeat “stay” and “movement”. In the present embodiment, the mobile terminal 2 is under the control of any base station at any position and continues to perform wireless communication with the base station. Note that it is also preferable that the mobile terminal 2 communicates with a plurality of base stations at a time for the purpose of smooth handover, for example, and communicates with, for example, the base station with the highest signal strength.

  In the embodiment of FIG. 1, the user of the mobile terminal 2 enters a “stay” state at home, the A station where the user gets on, the B station where the transfer is performed, and the company office of the office, and walks between these stay states. Connected in a “moving” state such as a car or a ride.

  The base station 3 is connected to a wide area wireless communication network (mobile phone network), and includes a date and time (for example, a date and time when communication is started or ended) for each mobile terminal 2 under its control. Get information. Such information acquisition includes calls, mail transmission / reception, web page browsing, communication between the application installed on the mobile terminal 2 and the server, and download or upload of the application or content. It is carried out at the time of etc.

  Moreover, although not shown in figure, the communication carrier equipment 1 which is connected by communication with these many base stations 3 and integrates these stations is installed. For each portable terminal 2 that communicates with the base station 3, the communication carrier equipment 1 can always collect a communication record including the date and time information at the time of communication and the information of the base station that is the communication target. it can. A communication history is a collection of these communication records in time series.

  In general, the communication history includes location information of base stations with coarse spatial granularity and non-constant time intervals. Here, “the spatial granularity is coarse” means that the (geographic) distance in the real space between the position information is relatively long. Further, “the time interval is not constant” means that the time interval between the date and time information associated with the position information varies depending on the communication timing.

The telecommunications carrier equipment 1 as the stay determination device according to the present invention can determine whether or not the state of the user carrying the mobile terminal 2 is “stay” using the communication history. Specifically, the telecommunications carrier equipment 1 is preliminarily provided for each portable terminal 2.
(A) Date and time related to communication;
(B) A communication history including a plurality of communication records associated with position information indicating the position of the base station related to communication (or the position related to the mobile terminal 2 derived based on the position) is accumulated.

Next, telecommunications carrier equipment 1
(A) For each communication record, based on the date and time included in the plurality of communication records, determine a “comparison target communication record” to be compared for the communication record,
(A) The position indicated by the position information related to the “comparison target communication record” determined for the communication record of the stay determination target that is the target of stay determination is centered on the position indicated by the position information related to the communication record of the stay determination target If it is included in the predetermined distance range, it is determined that the state of the user of the mobile terminal 2 related to the communication record of the stay determination target is “stay”.

Here, in the determination of “comparison target communication record”,
(C) The communication record determined to be “stay” is sequentially traced from the communication record of the stay determination target in terms of date and time, and the communication record determined to be “stay” does not exist immediately before itself. Ask for. Next, with respect to the communication record to be stayed, the communication record from this last communication record to the communication record existing immediately before the communication record to be stayed is determined as the “comparison target communication record”.

  As a result, if the position of the mobile terminal 2 that has been determined to be in the “stay” state is related to the base station 3 that has been related to the mobile terminal 2, the position remains within the predetermined range. In this case, it can be confirmed in detail that the state is “staying”. Such confirmation is, for example, a situation in which it is determined as “stay” even when the mobile terminal 2 “moves” between a plurality of base stations 3 related to communication records included in a predetermined time range by a considerable distance. This makes it possible to determine “stay” only to the extent prescribed by a predetermined distance range. As a result, without relying on the positioning function of the mobile terminal 2, the “stay” status of the user possessing the mobile terminal 2 can be obtained using the position information related to the base station 3 included in the communication history that can be acquired by the communication carrier side. It can be estimated with high accuracy.

  FIG. 2 is a functional block diagram showing a functional configuration in an embodiment of the stay determination device according to the present invention.

  A communication equipment device 1 shown in FIG. 2 is an embodiment of a stay determination device according to the present invention, is connected to a wide area wireless communication network (mobile phone network), and appropriately collects communication history from the base station 3. be able to. The stay determination device according to the present invention can be a computer that can determine whether the state of the user who has the mobile terminal 2 is stay using the communication history acquired from the outside. . In this case, it may not be connected to a wide area wireless communication network (cellular phone network).

  According to FIG. 2, the communication facility device (stay determination device) 1 includes a communication interface unit 101, a communication history storage unit 102, and a processor memory. Here, the processor memory realizes the stay determination function by executing a program that causes the computer, which is the main function unit of the device 1, to function.

  Further, the processor memory includes, as functional components, a comparison target determination unit 111, a stay determination unit 112, a connection determination unit 113, a stay location specifying unit 114, a stay location determination unit 115, and a stay time determination unit. 116, a setting file management unit 117, and an application processing unit 131. 2 is understood as an embodiment of the stay determination method according to the present invention.

  Furthermore, the communication facility device 1 further includes a communication record collection unit 121, a base station location information management unit 122, and a location information history generation unit 123 in order to cause the communication history accumulation unit 102 to accumulate a communication history.

[Setting file management unit 117]
The setting file management unit 117 stores and manages setting values used in each step of stay determination, which will be described later as appropriate, as a setting file. The setting file may be received from the outside via the communication interface unit 101, or may be input via the input unit of the device 1 (not shown).

FIG. 3 is a table showing an example of a setting file managed by the setting file management unit 117. According to FIG. 3, the configuration file contains
(A) "Comparison time" used when determining a comparison target communication record;
(B) “Maximum distance between base stations” used when determining whether or not to set a stay flag;
(C) "Maximum waiting time" used when determining whether or not to set a connection flag;
(D) A specific value (set value) is set for the “maximum number of base stations” used when determining the stay location and the stay time. These set values are used by the comparison target determination unit 111, the stay determination unit 112, the connection determination unit 113, the stay location determination unit 115, and the stay time determination unit 116, as will be described in detail later.

[Base station location information management unit 121]
The base station location information management unit 121 (FIG. 2) stores and manages a base station information file in which a base station identifier is associated with “location information related to a base station”. Here, "location information related to the base station"
(A) Base station position information indicating the installation position of the base station 3 may be used. Moreover, as a change aspect,
(B) It is also possible to use position information indicating the positioning result of the location of the mobile terminal 2 derived based on the installation position of the base station 3. In the embodiment described below, the description is made using the base station location information of (a) above, but instead, the location information of (b) is also used to determine whether or not it is a stay. It is also possible to carry out processing.

  Here, the position information (b) includes, for example, the installation position of the base station 3, the radiation direction (radiation angle) of the radio signal from the base station 3, and between the base station 3 and the portable terminal 2. It can be derived from RSSI (Received Signal Strength Indication) or RTD (Round Trip Delay time). In addition to the identification numbers such as 0001 and 0002, the terminal address or telephone number can be used as the base station identifier.

  FIG. 4 is a table showing an embodiment of a base station information file managed by the base station location information management unit 121. According to FIG. 4, in the base station information file, the latitude and longitude of the base station as base station position information are associated with each base station identifier. In FIG. 4, for example, it is understood that the base station 0001 (base station 3 whose base station identifier is 0001) is installed at a position where the latitude is 37.21 degrees and the longitude is 139.31 degrees. Note that such base station position information may be stored in advance in the base station position information management unit 121, or may be appropriately transmitted from each base station 3 via the communication interface unit 101, for example, during data transmission. You may acquire. Furthermore, as a change mode of the base station information file, it is also preferable that the base station information other than the latitude and longitude is associated with an angle range and a radio wave radiation angle at which radio waves are radiated for each base station.

[Communication Record Collection Unit 122]
The communication record collection unit 122 (FIG. 2), for each portable terminal 2 from the base station 3 that connects the portable terminal to the subordinate, communicates the date and time (time information) related to communication and the base station identifier of the base station 3 related to communication. Communication records (communication logs) are collected. Here, the communication history is a communication record in which date and time are arranged in chronological order. The date and time related to communication may be the connection start date and time of communication, or may be the date and time of disconnection of communication. Also, as the date and time related to communication, both the communication connection start date and time and the communication disconnect date and time may be included in the communication record. Furthermore, it is preferable that radio information such as radio wave signal strength (RSSI) and round trip delay time (RTD) from a base station involved in communication is further associated with each terminal identifier as a communication record change mode.

FIG. 5 is a table showing an example of a communication history managed by the communication record collection unit 122. In the communication history shown in FIG. 5, date and time (time information) and a base station identifier are associated with each terminal identifier of the mobile terminal 2 in each communication record.
Communication record (terminal, date / time, base station identifier)

  The communication history of FIG. 5 is a history of the mobile terminal ABC (the mobile terminal 2 whose terminal identifier is ABC). According to FIG. 5, it is understood that the mobile terminal ABC communicated with the base station 0001 on July 31, 2014 at 20:11:15.

[Location Information History Generation Unit 123]
The location information history generation unit 123 (FIG. 2) uses the base station information file managed by the base station location information management unit 121, and in the communication history, the location information related to the base station corresponding to the base station identifier for each communication record (Base station position information) is further correlated to generate a base station information merge communication history. The generated base station information merge communication history is output to communication history storage section 102.

  FIG. 6 is a table showing an embodiment of the base station information merge communication history generated by the position information history generation unit 123.

  According to FIG. 6, the base station information merge communication history is obtained by adding the base station information file shown in FIG. 4 to the communication history shown in FIG. 5 in association with the base station identifier. According to the communication history of FIG. 6, it is understood that the mobile terminal ABC communicated with the base station 0001 located at the position of latitude 37.21 degrees and longitude 139.31 degrees on July 31, 2014 at 20:11:15.

[Communication history storage unit 102]
The communication history accumulation unit 102 (FIG. 2) accumulates the base station information merge communication history output from the position information history generation unit 123. That is, for each mobile terminal 2, a plurality of dates and times related to communication are associated with position information indicating the position of the base station related to communication (or the position related to the mobile terminal derived based on the position). The base station information merge communication history including the communication record is accumulated. In the present embodiment, the communication history accumulating unit 102 can also store “stay place position” and “stay time” determined as will be described later.

[Comparison Target Determination Unit 111]
The comparison target determination unit 111 (FIG. 2) acquires the base station information merge communication history from the communication history storage unit 102, and for each communication record based on the date and time included in the plurality of communication records. The “comparison target communication record” to be compared is determined. This “comparison target communication record” is used for determination related to the base station 3 of the communication record when determining whether or not it is a stay state based on the communication record of the portable terminal 2, as will be described in detail later. The communication record used.

Specifically, the comparison target determining unit 111
(A) The communication record determined as staying is sequentially traced back from the “stay determination target communication record” that is the communication record that is the target of stay determination, and the communication record determined as staying is the one before itself. For the last communication record that does not exist in
(B) For the stay determination target communication record, the communication record from the last communication record to the communication record existing immediately before the stay determination target communication record is determined as the comparison target communication record. .

[Stay determination unit 112]
The stay determination unit 112 (FIG. 2) indicates that the position indicated by the position information related to the “comparison target communication record” determined for the “stay determination target communication record” is the position indicated by the position information related to the “stay determination target communication record”. If the mobile terminal 2 is in the predetermined distance range centered on the mobile terminal 2, it is determined that the mobile terminal 2 is staying. Here, the predetermined distance range can be a circular range having a radius of “maximum distance between base stations” set in the setting file input from the setting file management unit 117. The stay determination unit 112 also maintains the state of the user of the mobile terminal 2 related to the “stay determination target communication record” even when it is determined that the “comparison target communication record” does not exist for the “stay determination target communication record”. It is also preferable to determine that

  FIG. 7 is a table for explaining an embodiment of processing in the comparison target determination unit 111 and the stay determination unit 112.

  According to FIG. 7, the aspect which determines a "comparison object communication record" and implements stay determination for every communication record of a base station information merge communication history is schematically represented. The value of “stay flag” as the stay determination result is associated. Here, the “immediate communication record” used in the following description is defined. A communication record having a date and time that is included in a predetermined time range retroactively from the date and time included in one communication record and that corresponds to the date and time immediately before the date and time of this one communication record is referred to as “previous communication record”. Is defined. Among these, the predetermined time range can be a “comparison target time” set in the setting file input from the setting file management unit 117.

The comparison target determination unit 111
(A) Starting from the stay determination target communication record, the communication records are sequentially traced, and the “previous communication record” determined as stay is sequentially obtained until the last communication record without the “previous communication record” determined as stay. Going back, for this stay determination target communication record, from this last communication record to the "previous communication record" determined to stay is determined as a comparison target communication record,
(B) A communication record having a date and time included in a time range from a time before a predetermined time of the date and time included in the stay determination target communication record to a time after the predetermined time has elapsed. To decide. Here, the “predetermined time” can be the “comparison target time” set in the setting file, as in the case of the definition of “previous communication record”.

  In FIG. 7, the range of the comparison target communication record determined in the above (a) and (b) is indicated by an arrow in the comparison target record determination and stay determination column. Hereinafter, processing in the comparison target determination unit 111 and the stay determination unit 112 will be described as a specific example with reference to FIG. Here, the “comparison target time” is 10 minutes, and the “maximum distance between base stations” is 2.1 km.

  First, regarding the communication record No. 1 as the stay determination target, the comparison target communication records are communication records No. 2 to No. 4 included in 10 minutes whose date and time is “comparison target time”. Further, the base stations 0002 and 0003 related to the comparison target communication records No. 2 to No. 4 have a radius of “maximum base station distance” with the position of the base station 0001 related to the stay determination target communication record No. 1 as the center. Located within a circle range of 2.1 km. As a result, the state of the user of the portable terminal 2 related to the communication record No. 1 is determined to be stay, and a stay flag is set to the communication record No. 1, that is, “stay flag” = 1 is associated. .

  As for the communication record No. 6 as the stay determination target, looking back at the communication record, the communication records No. 1 to No. 5 are the communication records immediately before the communication records No. 2 to No. 6, respectively. Furthermore, the stay flag of communication records No. 1 to No. 5 is 1. As a result, communication records No. 1 to No. 5 are comparison target communication records of stay determination target communication record No. 6. On the other hand, the next communication record No. 7 is not included in the time range up to the time after the comparison target time (10 minutes) of the date time of the communication record No. 6 has elapsed. Not applicable to records.

  Similarly, for the stay determination target communication record No. 6, the base stations 0001, 0002 and 0003 related to the comparison target communication records No. 1 to No. 5 indicate the position of the base station 0002 related to the stay determination target communication record No. 6. The center is located within a circle with a radius of “maximum base station distance” = 2.1 km. As a result, it is determined that the state of the user of the mobile terminal 2 related to communication record No. 6 is stay, and “stay flag” = 1 is associated with communication record No. 6.

  Furthermore, regarding the communication record No. 7 for stay determination, looking back at the communication record, the date and time of the previous communication record No. 6 goes back from the date and time included in the communication record N0.7. “Target time” = not included in the time range of 10 minutes. Therefore, communication record No. 6 does not correspond to the comparison target communication record. On the other hand, the communication records No. 8 and No. 9 have the date and time included in the time range up to the time after the elapse of 10 minutes of “date of comparison” of the date and time included in the communication record No. 7. Therefore, communication records No. 8 and No. 9 correspond to comparison target communication records.

  Similarly, for the stay determination target communication record No. 7, the base station 0001 of the base stations 0004 and 0001 related to the comparison target communication records No. 8 and No. 9 is the base station 0004 related to the stay determination target communication record No. 7 The maximum distance between base stations is not within a circle range having a radius of 2.1 km. As a result, it is determined that the state of the user of the mobile terminal 2 related to the communication record No. 7 is not staying (moving), and “stay flag” = 0 is associated with the communication record No. 7.

  Furthermore, for the stay determination target communication record No. 8, since the stay flag of the communication record No. 7 is 0, (the date and time related to the communication record No. 8) −the time of “comparison target time (10 minutes)” Communication records N0.7 and No.9 to No.10 included in the time range from the time of (date and time related to communication record No. 8) to the time of “comparison target time (10 minutes)” Record. Of the base stations 0004 and 0001 related to these comparison target communication records N0.7 and No. 9 to No. 10, the base station 0001 is centered on the position of the base station 0004 related to the stay determination target communication record No. 8. “Maximum distance between base stations” = not within a circle with a radius of 2.1 km. As a result, it is determined that the state of the user of the mobile terminal 2 related to the communication record No. 8 is not stay (moving), and “stay flag” = 0 is associated with the communication record No. 8.

  Furthermore, regarding the stay determination target communication record No. 13, the previous communication record No. 12 has a stay flag of 1, but is not within the “comparison time (10 minutes)” range. Does not exist. In this embodiment, “stay flag” = 1 is associated with the stay determination target communication record No. 13 in which no comparison target communication record exists.

  In other words, in the processing in the comparison target determination unit 111 and the stay determination unit 112, first, the base station information merge communication history is read in chronological order, and the comparison target communication records before and after the stay determination target communication record are read. The distances for the base station 3 are compared, and 1 or 0 is added as a stay flag. The “comparison target time” in the setting file is used to determine the comparison target communication record, and the “maximum base station distance” is used to compare the distances of the base stations 3. Here, when there is no communication record within the range of “comparison target time”, or when all the base stations related to the existing communication record satisfy the condition regarding “maximum distance between base stations”, the stay determination communication record stays If the flag is set to 1 and the flag is not satisfied, the stay flag is set to 0.

  Further, when the stay flag of the record immediately before the stay determination target communication record is 1 within the range of the “comparison target time”, the stay determination is made before the “comparison time” of the previous communication record. A communication record included in the time range until the “comparison time” of the target communication record elapses is set as a comparison target communication record. Furthermore, when the stay flag of the communication record which is in the time range before the “comparison time” of the previous communication record and which is one previous (two previous) is 1, this two previous communication A communication record included in the time range from before the “comparison time” of the record to after the “comparison time” of the stay determination target communication record is set as the comparison communication record. In this way, when communication records having a stay flag of 1 are consecutive before the stay determination target communication record, this continuous “stay flag” = 1 communication record can also be a comparison target communication record.

  As a result, if the portable terminal 2 having a history of having been continuously determined to be in the “stay” state is viewed in time units of about “comparison target time”, can it be continuously in the “stay” state? It can be judged. As a result, by appropriately setting the “comparison target time”, for example, even when the mobile terminal 2 “moves” by a considerable distance in the entire time range determined as “stay” continuously, for example. The situation of being determined as “stay” can be avoided, and the possibility of continued “stay” can be determined with the fineness of time defined by “comparison time”. As a result, the “stay” status of the user who has the mobile terminal 2 can be estimated with high accuracy.

  FIG. 8 is a flowchart illustrating an embodiment of processing in the comparison target determination unit 111 and the stay determination unit 112.

(S101) A setting file is read.
(S102) The communication records (communication history) are read in chronological order. Here, the record number parameter i is set to zero.
(S103) Increment i by 1.

(S104) It is determined whether or not a communication record exists before and after the “comparison target time” of the i-th communication record (stay determination target communication record). Here, when a false determination (determination that it does not exist) is performed, the process proceeds to step S108a.
(S105) On the other hand, if true determination (determination that it exists) is made in step S104, it is next determined whether or not the stay flag of the immediately preceding communication record is 1.

(S106a) If true determination is made in step S105, the i-th communication record (stay determination) is traced back from the first communication record (the earliest date and time) of the communication record with “stay flag” = 1. Up to communication records within the “comparison target time” elapsed range of (target communication record) are set as comparison target communication records.
(S106b) On the other hand, if a false determination is made in step S105, a communication record within the time range before and after the “comparison target time” of the i-th communication record (stay determination target communication record) is set as a comparison target communication record. .

(S107) Whether or not all the distances between the base station 3 related to the i-th communication record (stay determination target communication record) and the base station 3 of the determined comparison target communication record are within the “maximum distance between base stations” Determine whether.
(S108a) When a true determination is made in step S107, the stay flag of the i-th communication record (stay determination target communication record) is set to 1.
(S108b) On the other hand, when a false determination is made in step S107, the stay flag of the i-th communication record (stay determination target communication record) is set to 0.

(S109) It is determined whether or not the i-th communication record is the last record. Here, if a false determination is made, the process proceeds to step S103 to enter a comparison target communication record determination process for the next communication record in time series order. On the other hand, when the true determination is made in step S109, the process of the present embodiment in the comparison target determining unit 111 and the stay determining unit 112 is terminated.

[Connection determination unit 113]
The connection determination unit 113 (FIG. 2)
(A) A communication record determined as stay by the stay determination unit 112 (stay flag is 1) is a connection determination target communication record that is a connection determination target,
(B) Date and time included in the “maximum standby time” range acquired from the setting file retroactively from the date and time included in the connection determination target communication record, and one of the date and time of the connection determination target communication record There is a communication record having a date and time corresponding to the previous one, and the position indicated by the position information related to the previous communication record is “predetermined distance centered on the position indicated by the position information related to the connection determination target communication record. When it is included in the “range”, a connection flag is set in the connection determination target communication record, that is, the connection flag is set to 1.
Here, the “predetermined distance range” can be the “maximum distance between base stations” acquired from the setting file of the setting file management unit 117.

  In other words, in this connection determination process, the date and time difference between the connection determination target communication record and the previous communication record is within the “maximum standby time”, and the distance between the base stations 3 is “the maximum distance between base stations” "Is satisfied, the connection flag is set to 1. Otherwise, the connection flag is set to 0.

[Stay place identification unit 114]
The stay location specifying unit 114 (FIG. 2) determines the stay location for the communication record determined to be the first stay when the communication records subjected to the connection determination are arranged in the time series of the date and time included in the communication record. A staying place identifier that identifies the stay is determined, and the stay determination status and the connection determination status are checked for each communication record in chronological order, and the stay flag is determined (the stay flag is 1), but the connection flag is not raised. In addition, a stay destination identifier different from the stay place identifier assigned to the previous communication record is assigned to the communication record (the connection flag is 0).

  Thus, by identifying the staying place, as will be described later, it is possible to determine the staying place position and staying time in more detail and with high accuracy.

  FIG. 9 is a table for explaining an embodiment of processing in the connection determination unit 113 and the stay location specifying unit 114.

  As shown in FIG. 9, the connection determination unit 113 connects the communication records with the stay flag set to 1 in time series in the base station information merge communication history with the stay flag added as shown in FIG. A determination is made and 1 or 0 is added as a connection flag. In addition, the stay location specifying unit 114 assigns a stay location identifier that identifies the stay location in the stay of the mobile terminal 2 related to the communication record for which the connection determination has been made, according to the state of the stay flag and the connection flag. Hereinafter, the “maximum standby time” is 120 minutes.

  Specifically, in FIG. 9, for example, the date / time of communication record No. 11 as a connection determination target is within the time range after the “maximum standby time” elapses from the date / time of communication record No. 10. Since the distance between the base station 0004 of the determination target communication record No. 11 and the base station 0001 of the communication record No. 10 is larger than the “maximum distance between base stations”, the connection flag is 0 in the communication record No. 11. . Further, for example, the date / time of communication record No. 13 as the connection determination target is within the time range after the “maximum standby time” has elapsed from the date / time of communication record No. 12, and further, the connection determination target communication record No. The base station of .13 and the base station of communication record No. 12 are the same (the base station 0004), and the distance between them is zero and smaller than the “maximum base station distance”. In .13, the concatenation flag is 1.

  Similarly, referring to FIG. 9, an example of the stay location specifying process will be described. For example, in communication records No. 10 to No. 15, the stay flag is continuously 1, but the connection flag in communication record No. 11 and communication record No. 14 is 0. Accordingly, communication records No. 10 to No. 15 are related to (a) communication record No. 10, (b) communication records No. 11 to No. 13, and (c) No. 14 to No. 15. It can be estimated that there are two places to stay. In FIG. 9, 2, 3, and 4 which are stay place identifiers corresponding to each stay place are assigned to (a) to (c).

  Here, as for communication record No. 9, both the stay flag and the connection flag are 1 in the communication record No. 10 which is the next one. In this case, communication record No. 9 is preferably handled as having the same stay location as communication record No. 10, even if the stay flag is 0. That is, “stay destination identifier” = 2 may be assigned to the communication record No. 9.

  FIG. 10 is a flowchart illustrating an embodiment of processing in the connection determination unit 113.

(S201) A setting file is read.
(S202) The communication records (communication history) are read in chronological order. Here, the record number parameter i is set to zero.
(S203) i is incremented by one.

(S204) It is determined whether or not the i-th communication record (stay determination target communication record) is the first communication record. Here, when true determination (determination that it is the first communication record) is performed, the process proceeds to step S206a and the connection flag of the i-th communication record is set to 1.
(S205) On the other hand, if a false determination (determination that it is not the first communication record) is made in step S204, the communication record immediately before the i-th communication record (stay determination target communication record) is “maximum standby”. Whether the distance between the base station 3 related to the i-th communication record and the base station 3 related to the immediately preceding communication record is within the “maximum distance between base stations”. Determine whether or not.

(S206a) When a true determination is made in step S205, the connection flag of the i-th communication record (stay determination target communication record) is set to 1.
(S206b) On the other hand, if a false determination is made in step S205, the connection flag of the i-th communication record (stay determination target communication record) is set to 0.

(S207) It is determined whether or not the i-th communication record is the last record. Here, if a false determination is made, the process proceeds to step S203, and a connection determination process for the next communication record in time series order is entered. On the other hand, when the determination is true in step S207, the process of the present embodiment in the connection determination unit 113 is terminated.

[Stay location determination unit 115]
The stay location determination unit 115 (FIG. 2) is configured to perform the time series of the base station 3 related to the stay location grant communication record in the time series order of the date and time included in the stay location grant communication record to which the stay location identifier is assigned. About the transition in
(A) When a number of different base stations 3 that exceed a predetermined “maximum number of base stations” obtained from the setting file, as counted from the base station 3 related to the stay location grant communication record to be positioned, appear,
(B) From this stay location grant communication record of the positioning target, the stay location grant communication that is one before the stay location grant communication record in which the last base station 3 appears when the “maximum number of base stations” is exceeded. When different base stations 3 of “maximum number of base stations” appear alternately or discontinuously before the record,
(C) The location of the stay location for the location-attached communication record of the positioning target is the result of positioning performed using different base stations 3 having the “maximum number of base stations”.

  Here, the “maximum number of base stations” in the setting file input from the setting file management unit 117 greatly contributes to the accuracy of the position of the stay destination to be determined. Actually, it is preferable that the “maximum number of base stations” is set in advance to a smaller value (larger value) as the stay position in a narrower area (wider area) is obtained. As described above, by appropriately setting the “maximum number of base stations”, it is possible to obtain a positioning result corresponding to the accuracy required for the acquired stay position.

  FIG. 11 is a table for explaining an embodiment of the process in the stay location determining unit 115.

  As shown in FIG. 11, the stay location determination unit 115 performs positioning for each stay identifier with respect to the communication record in time series order in the base station information merge communication history given the stay flag, the connection flag, and the stay location identifier. Perform the process. Specifically, when there are a plurality of base stations 3 having the same place-of-stay identifier, positioning using the plurality of base stations 3 is performed based on the “maximum number of base stations” according to the appearance order of the base stations 3 The result is the stay location. Here, regarding the order of appearance of the base stations 3, for example, assuming that the “maximum number of base stations” is 2, a continuous communication record having the same stay identifier when the third different base station 3 appears, or If two different base stations 3 appear alternately by the last communication record in, the positioning result using the first and second base stations 3 is taken as the stay location, and the third different base station 3 The location before arrival or the last communication record is set as the same stay location (latitude and longitude).

  Further, if the base stations 3 do not appear alternately, positioning using the base station 3 that appears first is performed, and the positioning result is applied to each communication record. Next, the second base station 3 and the third different base station 3 are held, and if they appear alternately in the previous time, the second and third base stations are used. Carry out positioning. Further, when positioning is performed by a plurality of base stations as described above, the information of the base station 3 that appears last is set as the first unique base station 3, and the process proceeds to the next communication record.

  Specifically, the stay location determination process when the “maximum number of base stations” is 2 will be described with reference to FIG. For communication record No. 1, there are three different base stations 3 (No. 1: 0001, No. 2: 0002, No. 3: 0003) at the time of communication record No. 3, and communication record No. 1 Since the base station 0001 and the base station 0002 of the communication record No. 2 do not appear alternately, the positioning result using the base station 0001 is set as the staying place position, instead of the multiple base station positioning.

  Next, for communication record No. 2, there are three different base stations at the time of communication record No. 5 (No. 2: 0002, No. 3: 0003, No. 4: 0002, No. 5: 0001) Thus, the base station 0002 of communication record No. 2 and the base station 0003 of communication record No. 3 appear alternately. Therefore, each of the three communication records from the communication record No. 2 to the communication record No. 4 uses the same positioning result using the base station 0002 and the base station 0003 as the stay location.

  Here, since the multi-station base station positioning is performed, the base station 0002 of the communication record No. 4 is held, and the appearance of the base station 3 after the communication record No. 5 is confirmed. As a result, there are three different base stations 3 (No. 4: 0002, No. 5: 0001, No. 6: 0002, No. 7: 0004) at the time of communication record No. 7, Since the base station 0001 appears alternately, from the communication record No. 4 to the communication record No. 6, the positioning result using the base station 0002 and the base station 0001 is used as the stay location. However, since the communication record No. 4 has already been given the positioning result as described above, the positioning results using the base station 0002 and the base station 0001 are only included in the communication records No. 5 and No. 6. Can be applied. As a change mode, for the communication record No. 4 where the two positioning results can be applied in this way, the difference in time information (date time) between the previous and subsequent communication records No. 3 and No. 5 is used. It is also preferable to adopt the positioning result on the communication record side that is close.

  Further, for communication records No. 7 and later, there is only one unique base station 3 even if a stay location identifier is not assigned in each communication record, or a stay location identifier is assigned. Therefore, in each communication record after communication record No. 7, the positioning result by the single base station 3 related to the communication record is determined as the stay location.

  Next, the stay location determination process when the “maximum number of base stations” is 3 will be described using FIG. 11. In this case, when the base stations 3 related to the communication record are confirmed in chronological order, the determination is performed when four different base stations 3 appear. For example, for communication record No. 1, there are four different base stations 3 at the time of communication record No. 7, and there are portions where base station 0001 and base station 0002 appear alternately or interchangeably. . Therefore, for each of the communication records No. 1 to No. 6, the result of multi-station positioning using the base station 0001, the base station 0002, and the base station 0003 is set as the stay location.

  FIG. 12 is a schematic diagram showing an embodiment relating to selection of the base station 3 used for positioning.

  12A to 12D show base station identifier columns in communication records arranged in chronological order with the same stay destination identifier. Although the base station identifier columns in FIGS. 12A, 12B, and 12D are the same, in FIG. 12C, the base station identifier of the seventh communication record is 0002. 12 is different from 0001 which is the base station identifier in (A), (B) and (D).

  First, FIG. 12A shows an example of base station selection when the “maximum number of base stations” is two. In this case, positioning is performed by two single base stations (both by base station 0004) and three two-station base stations (two 0001 and 0002, and one 0001 and 0003). It has become. Here, the base station 0001 in the fifth row from the beginning is the first range in which positioning is performed, and positioning by the base stations 0001 and 0003 is performed. Next, the fifth range (0001) to the seventh row (0001) is the second range in which positioning is performed, and positioning by the base stations 0001 and 0002 is performed. However, since the fifth row (0001) already has a positioning result, in the second range, the sixth row (0002) and the seventh row (0001) are positioning targets.

  Next, FIG. 12B shows an example of selecting a plurality of base stations when the “maximum number of base stations” is three. In this case, the positioning is positioning by two two-station base stations (positioning by 0001, 0002 and 0003 and positioning by 0001, 0002 and 0004). Here, the seventh line (0001) counted from the beginning is also included in the second range in which positioning is performed, but already has a positioning result as the first range, so in this second range, The 8th line (0004) and after are positioning targets.

  On the other hand, when the “maximum number of base stations” is 3, as shown in FIG. 12C, the base station identifier of the seventh communication record is different, and positioning is performed by one two-station base station. (Positioning by 0001 and 0003) and positioning by one three-station base station (positioning by 0001, 0002 and 0004). Here, the fifth line (0001) counted from the beginning also enters the second range for positioning, but already has the positioning result as the first range, so in this second range, The 6th line (0002) and after are positioning targets.

  Further, FIG. 12D shows an example of selecting a plurality of base stations when the “maximum number of base stations” is four. In this case, positioning is performed by one four-station base station (positioning by 0001, 0002, 0003, and 0004).

  As described above, by appropriately adjusting the “maximum number of base stations”, it is possible to obtain an effective positioning result having an accuracy suitable for the installation situation such as the installation density of the base stations 3.

  FIG. 13 is a flowchart illustrating an embodiment of the process in the stay location determining unit 115.

(S301) A setting file is read.
(S302) The communication records (communication history) are read in chronological order. Here, the record number parameter i is set to zero.
(S303) Increment i by one.

(S304) It is determined whether or not the stay flag of the i-th communication record (stay determination target communication record) is 1. If a false determination (determination that the stay flag is not 1) is made, the process proceeds to step S311 described later.
(S305) On the other hand, if a true determination (determination that the stay flag is 1) is made in step S304, whether or not the connection flag of the i-th communication record (stay determination target communication record) is 1 is determined. judge.
(S321) When a false determination is made in step S305, the base station 3 of the i-th communication record (stay determination target communication record) is held as a stay location candidate.

(S306) On the other hand, when a true determination is made in step S305, it is determined whether or not the number of stored different base stations is within the “maximum number of base stations”. Here, when the true determination (determination that the “maximum number of base stations” is not exceeded) is performed, the process proceeds to step S303.
(S307) On the other hand, if a false determination is made in step S306 (determination that the “maximum number of base stations” has been exceeded), the base station 3 is checked for an alternate or alternating appearance order, and a plurality of base stations 3 are Apply the positioning results used to the location. Here, from the base station related to the communication record corresponding to the start of stay to the base station related to the communication record of (i-1) with respect to the current i, the order of appearance is investigated, and the communication record of (i-1) Hold the base station and reprocess the communication record of i.

(S311) If a false determination (determination that the stay flag is not 1) is made in step S304, it is determined whether or not there is a retained base station 3. If the determination is true, the process proceeds to step S306.
(S312) On the other hand, if a false determination is made in step S311, the positioning result using the base station 3 of the i-th communication record (stay determination target communication record) is applied as the stay location.

(S307) It is determined whether or not the i-th communication record is the last record. Here, if a false determination is made, the process proceeds to step S203 to enter a stay location determination process for the next communication record in time series order. On the other hand, when a true determination is made in step S307, the processing of the present embodiment in the stay location determination unit 115 is terminated.

Next, one embodiment of positioning performed using a plurality of base stations 3 will be described. In the present embodiment, the communication history storage unit 102 (FIG. 2)
(A) Date and time related to communication;
(B) position information of the base station 3 related to communication;
(C) A communication history including a plurality of communication records in which RSSI (reception signal strength) or RTD (round trip delay time) related to communication is associated is accumulated.

  Here, the stay location determining unit 115 (FIG. 2) is based on the location information and the RSSI or RTD for the different base stations 3 corresponding to the “maximum number of base stations” in the configuration file input from the configuration file management unit 117. The calculated positioning result is set as the stay location for the communication record to be positioned. Specifically, the distance between the mobile terminal 2 and the base station 3 is calculated based on RSSI or RTD, and the calculated distance information and information on the installation position of each base station (for example, latitude and longitude) are used to calculate 3 The position of the portable terminal 2 can be calculated by a method such as point positioning, and the position can be set as the stay location.

  When the communication history does not include the wireless information as in (c) above, the center of gravity at the selected positions of the plurality of base stations 3 can be used as the positioning result.

  FIG. 14 is a table illustrating another embodiment of positioning performed using a plurality of base stations 3. FIG. 15 is a schematic diagram for explaining another embodiment.

As shown in FIG. 14, the stay location determining unit 115
(A) A stay flag, a connection flag, and a stay place identifier are given, and
(B) a base station 3 used for positioning;
(C) the distance between the terminal and the base station calculated based on RSSI or RTD;
(D) Base station information merge communication to which a radio wave radiation angle that is an azimuth angle of a signal radio wave radiated from the base station 3 (for example, north is a reference azimuth (zero degree) and clockwise is a positive angle) In the history, a stay location is determined for each stay identifier with respect to the communication record in chronological order.

  The distance (c) is a straight line distance between the terminal and the base station, and the distance values calculated for each base station 3 for the target mobile terminal 2 are aggregated, and the median value or average value is calculated and derived. May be. The radio wave radiation angle (d) represents the direction of the propagation axis extending to the center of the radio wave radiation angle range in the signal radio wave.

  Here, for example, when performing positioning using three base stations 0001, 0002, and 0003, the distances from the base stations 0001, 0002, and 0003 are 185 m, 200 m, and 180 m, respectively, as shown in FIG. The position of a point included in any of the radio wave emission ranges represented by the radio wave emission angles of the stations 0001, 0002 and 0003 can be used as a positioning result.

  As described above, in the positioning by the base station 3 selected based on the “maximum number of base stations” in the present embodiment, the base station 3 determined to be necessary is selected and the positioning is executed. As a result, the amount of calculation in the communication facility device 1 is significantly suppressed as compared with a mode in which positioning is performed using all base stations belonging to the time interval determined to be staying, for example.

[Stay time determination unit 116]
The stay time determination unit 116 (FIG. 2) uses the time series of the base station 3 related to the stay place grant communication record in the time series order of the date and time included in the stay place grant communication record to which the stay place identifier is given. About the transition of
(A) When a number of different base stations 3 appear that exceed the predetermined “maximum number of base stations” obtained from the setting file, counted from the base station 3 related to the stay location grant communication record corresponding to the start of stay ,
(B) From the stay location grant communication record corresponding to the start of stay, the previous stay location grant to the stay location grant communication record in which the last base station 3 appears when the “maximum number of base stations” is exceeded. Until the communication record, different base stations 3 of “the maximum number of base stations” appear alternately or not continuously,
(C1) determining the start time of the stay time in the stay related to the stay place grant communication record corresponding to the stay start based on the date and time included in the stay place grant communication record corresponding to the stay start;
(C2) The date included in the stay location grant communication record immediately before the stay location grant communication record in which the last base station 3 that has exceeded the “maximum number of base stations” appears is the end time of the stay time. Decide based on time.

  Here, as one embodiment, if the stay determination unit 112 (FIG. 2) relates to a single communication record for which the start time and the end time are determined, the mobile terminal related to this single communication record It is also preferable to determine that the state of the second user is not staying (moving) regardless of the previous determination. As described above, when the travel time is related to one communication record, it is possible to discriminate between “movement” and “stay”. However, if wireless base information and connection time, RSSI and RTD at the time of connection, and information on disconnected base station, disconnection time and RSSI and RTD at the time of disconnection can be acquired from the wireless information included in the communication history If the wireless information at the time and at the time of disconnection is the same, and the connection time and the disconnection time are separated from each other by a predetermined time (for example, 5 minutes) or more, “stay” is set. If they are different, “move” is also preferable.

  FIG. 16 is a flowchart showing an embodiment of processing in stay time determination unit 116.

  As shown in FIG. 16, the stay time determination unit 116 determines the stay time for each stay identifier with respect to the communication record in the time series order in the base station information merge communication history given the stay flag, the connection flag, and the stay place identifier. Perform decision processing. Here, the stay time is determined for each determined stay place position (for example, latitude and longitude) when the stay place position for each stay identifier is previously determined by the stay place position determination unit 115. .

  Similarly, according to FIG. 16, specifically, when the “maximum number of base stations” is 2, the communication records No. 2 to No. 4 have the same stay identifier and the same stay location (latitude and latitude). Longitude), the date and time (time information) “2014/07/31 20:13:25” of communication record No. 2 is the stay start time, and the date and time of communication record No. 4 “2014/07/31 20:16:18 "is the stay end time, and the stay time is 2 minutes 53 seconds. Also, since the communication records No. 5 and No. 6 have the same stay identifier and the same stay location (latitude and longitude), the date and time “2014/07/31” of the communication record No. 5 “20:22:12” is the stay start time, the date and time “2014/07/31 20:31:11” of communication record No. 6 is the stay end time, and the stay time is 8 minutes 59 seconds.

  Furthermore, although it is not positioning by a plurality of base stations, it is also possible to obtain a staying time by assuming that it is the same staying place position even if it has a staying place identifier and, for example, radio information such as RSSI and RTD is similar. preferable. For example, the wireless information in all communication records No. 11 to No. 13 where “stay destination identifier” = 3 is similar (for example, the maximum value of three RSSIs or RTDs is 120% or less of the minimum value). In this case, although it is positioning by a single base station, the stay time may be determined from the date and time of communication record No. 11 to the date and time of communication record No. 13.

  Next, in FIG. 16, when the “maximum number of base stations” is 3, communication records No. 1 to No. 6 all have the same stay location (latitude and longitude). The date and time of 1 “2014/07/31 20:11:15” is the stay start time, and the communication record No. 6 date and time “2014/07/31 20:31:11” is the stay end time and the stay time Is 19 minutes 56 seconds.

  FIG. 17 is a schematic diagram showing a mode of positioning according to the number of base stations to be used.

  FIGS. 17A, 17B, and 17C show positioning modes when the number of base stations used for positioning is 1, 2, and 3, respectively. According to this, it is understood that the larger the number of base stations used for positioning, the more suitable for obtaining positioning results (location of staying place) in a wider range. That is, the “maximum number of base stations” is set to a smaller value when obtaining a stay location and stay time in a narrower geographical range, and is more set when obtaining a stay location and stay time in a wider geographic range. It can be adjusted so that it is set larger.

  Returning to FIG. 2, the information on the stay location and stay time determined by the stay location determining unit 115 and the stay time determining unit 116 is accumulated in the communication history accumulating unit 102, and the communication interface unit 101 is appropriately used. May be output to the outside. Moreover, it is also preferable that the determined stay location and stay time are output to the application processing unit 131 (FIG. 2) and used for generating a service for each user (mobile terminal 2).

  As described above in detail, according to the apparatus, program, and method of the present invention, the position information related to the base station included in the communication history that can be acquired by the telecommunications carrier without relying on the positioning function of the mobile terminal is obtained. It is possible to estimate the staying status of the user who has the mobile terminal with high accuracy and with a shorter calculation time. Here, in general, the location information related to the base station has a coarse spatial granularity and the time interval is not constant, but even if such location information is used, is it a “stay” that is significant for operators and users? An estimation result of whether or not can be obtained. Furthermore, it is possible to determine “location of stay” and “stay time” with high accuracy. In particular, according to the present invention, information for estimating the staying state of a user can be acquired only on the telecommunications carrier side while avoiding the processing load for positioning on a mobile terminal.

  Here, as a service provided by estimating the user's stay state, for example, personalized information provision that distributes coupon information according to the daily stay location and stay time to the user possessing the mobile terminal Service. Also, for example, in the design of base station installation by a telecommunications carrier, based on the acquired stay status of the terminal (user), and information on the stay location and stay time, what kind of base station and where and how much It is also possible to determine whether it is appropriate to install as many as

  Various changes, modifications, and omissions of the various embodiments of the present invention described above within the scope of the technical idea and the viewpoint of the present invention can be easily made by those skilled in the art. The above description is merely an example, and is not intended to be any limitation. The present invention is limited only by the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Communication equipment 101 Communication interface part 102 Communication history storage part 111 Comparison object determination part 112 Stay determination part 113 Connection determination part 114 Stay place specific part 115 Stay place position determination part 116 Stay time determination part 117 Setting file management part 121 Communication record Collection unit 122 Base station location information management unit 123 Location information history generation unit 131 Application processing unit 2 Portable terminal 3 Base station

Claims (12)

An apparatus for determining whether or not the state of a user possessing a mobile terminal is staying,
Communication including a plurality of communication records in which, for each mobile terminal, the date and time related to communication is associated with the position of the base station related to communication or position information indicating the position related to the mobile terminal derived based on the position. A communication history storage unit that stores the history;
For each communication record, based on the date and time included in the plurality of communication records, comparison target determining means for determining a comparison target communication record to be compared for the communication record;
When the position indicated by the position information related to the comparison target communication record determined for the stay determination target communication record is included in the predetermined distance range centered on the position indicated by the position information related to the stay determination target communication record, A stay determination unit that determines that the state of the user of the mobile terminal related to the communication record of the stay determination target is stay;
The comparison target determining unit sequentially traces the communication records determined to stay from the communication record of the stay determination target with respect to the date and time, and the last communication in which the communication record determined to stay does not exist immediately before itself. The communication record from the last communication record to the communication record existing immediately before the stay determination target communication record is determined as the comparison target communication record. A stay determination device characterized by: The comparison target determining means includes
A communication record having a date and time that is included in a predetermined time range retroactively from the date and time included in one communication record and that corresponds to the date and time immediately before the date and time of the one communication record is the previous communication record. Then, starting from the communication record for the stay determination, the communication record is sequentially traced, the communication record immediately before determined as stay is sequentially obtained, and the last communication record without the previous communication record determined as stay is present. From the last communication record to the communication record immediately before determined to be stayed, the communication record to be compared is determined as the comparison target communication record.
The communication record having the date and time included in the time range from the time before the predetermined time included in the communication record of the stay determination target to the time after the predetermined time elapses is determined as the comparison target communication record. The stay determination apparatus according to claim 1, wherein: About the communication record of the connection determination target determined to be staying, it is the date and time included in the predetermined maximum waiting time range retroactively from the date and time included in the communication record of the connection determination target, and the communication record of the connection determination target There is a communication record having a date and time corresponding to the previous date and time, and the position indicated by the position information related to the previous communication record is the position indicated by the position information related to the communication record to be connected A link determination means for setting a link flag on the communication record of the link determination target,
When arranging the communication records subjected to the connection determination in the time series of the date and time included in the communication record, the communication record determined to be the first stay is assigned a stay location identifier that identifies the stay location, For each communication record in chronological order, the stay determination status and the connection determination status are checked, and with respect to the communication record that has been determined to be a stay but the connection flag is not set, The stay determination device according to claim 2, further comprising a stay place specifying unit that assigns different stay place identifiers.   About the transition in the time series of the base station related to the stay place grant communication record in the time series order of the date and time included in the stay place grant communication record to which the stay place identifier is given, the stay place grant communication for the positioning target When the number of different base stations that exceed the predetermined maximum number of base stations appears from the base station related to the record, and when the predetermined maximum number of base stations is exceeded from the stay location grant communication record of the positioning target The different base stations of the predetermined maximum number of base stations are alternately arranged in succession until the stay location grant communication record immediately before the stay location grant communication record in which the last base station appeared. Or, if the appearances are not continuous, the location of the staying location for the location-attached communication record of the positioning target is calculated using different base stations of the predetermined maximum number of base stations. Stay determination apparatus according to claim 3, characterized in that it comprises further a stay land position determining means for the result of by positioning. The communication history accumulating unit includes a communication record including a plurality of communication records in which, for each mobile terminal, date and time related to communication, position information of a base station related to communication, and signal strength or round-trip delay time related to communication are associated Accumulate history,
The stay location determining means uses the location information and signal strength or round trip delay time calculated for different base stations of the predetermined maximum number of base stations as the location location communication record for the positioning target. The stay determination apparatus according to claim 4, wherein the stay determination position is a position of a stay place.   The stay determination apparatus according to claim 4 or 5, wherein the predetermined maximum number of base stations is set to a smaller value in advance as the position of stay in a narrower area is obtained.   The staying place corresponding to the start of staying in the time-series transition of the base station related to the staying place granting communication record in the time series order of the date and time included in the staying place granting communication record to which the staying place identifier is given When the number of different base stations exceeding the predetermined maximum number of base stations appears from the base stations related to the granted communication record, the predetermined maximum number of base stations from the stay location granted communication record corresponding to the start of the stay The different base stations of the predetermined maximum number of base stations are connected in sequence until the stay location grant communication record that is one previous to the stay location grant communication record in which the last base station appears. If the appearance of the stay in the stay related communication record corresponding to the start of the stay is changed to the start of the stay. It is determined based on the date and time included in the corresponding stay location grant communication record, and the end time of the stay time is determined for the stay location grant communication record in which the last base station exceeding the predetermined maximum base station number appears. The stay determination device according to any one of claims 3 to 6, further comprising a stay time determination unit that determines a date based on a date and time included in the previous stay location grant communication record.   The stay determination means, when the stay time determined for the start time and the end time relates to a single communication record, the state of the user of the mobile terminal related to the single communication record regardless of the determination so far The stay determination device according to claim 7, wherein the stay determination device is determined to be moving.   When it is determined that there is no comparison target communication record for the stay determination target communication record, the stay determination unit determines that the state of the user of the mobile terminal related to the stay determination target communication record is stay The stay determination device according to any one of claims 1 to 7, wherein It is a communication equipment device which is a stay determination device according to any one of claims 1 to 9 connected to a wide area wireless communication network, in order to store a communication history in the communication history storage unit,
Base station location information managing means for storing a base station identifier and location information indicating the location of the base station or the location of the mobile terminal derived based on the location in association with each other;
A communication record collecting means for collecting a communication record in which a base station connected to a mobile terminal is associated with a base station identifier of the base station and a date and time related to communication for each mobile terminal;
A communication equipment apparatus, further comprising: a position information history generating means for further associating position information corresponding to a base station identifier for each portable terminal with respect to the communication record using the base station position information management means. A program for causing a computer installed in a stay determination device to determine whether the state of a user possessing a mobile terminal is stay,
The stay determination device associates, for each mobile terminal, a date and time related to communication and a position of a base station related to communication or position information indicating a position related to the mobile terminal derived based on the position. A communication history storage unit that stores communication history including communication records of
The program is
For each communication record, based on the date and time included in the plurality of communication records, comparison target determining means for determining a comparison target communication record to be compared for the communication record;
When the position indicated by the position information related to the comparison target communication record determined for the stay determination target communication record is included in the predetermined distance range centered on the position indicated by the position information related to the stay determination target communication record, The computer functions as a stay determination unit that determines that the state of the user of the mobile terminal related to the communication record of the stay determination target is stay,
The comparison target determining means sequentially traces the communication record determined to be staying from the communication record of the stay determination target in terms of date and time, and the communication record determined to be staying is the last communication record that does not exist immediately before itself. The communication record from the last communication record to the communication record existing immediately before the stay determination target communication record is determined as the comparison target communication record for the stay determination target communication record. A stay determination program. A method for determining stay using a stay determination device that determines whether or not the state of a user possessing a mobile terminal is stay,
The stay determination device associates, for each mobile terminal, a date and time related to communication and a position of a base station related to communication or position information indicating a position related to the mobile terminal derived based on the position. Having a communication history storage unit that stores communication history including communication records,
The stay determination method includes:
For each communication record, based on the date and time included in the plurality of communication records, a first step of determining a comparison target communication record to be compared for the communication record;
When the position indicated by the position information related to the comparison target communication record determined for the stay determination target communication record is included in the predetermined distance range centered on the position indicated by the position information related to the stay determination target communication record, A second step of determining that the state of the user of the mobile terminal related to the communication record of the stay determination target is stay, and sequentially performing the first step and the second step for each communication record,
In the first step, the communication record determined to stay in the second step is sequentially traced from the communication record of the stay determination target in terms of date and time, and the communication record determined to stay in the second step is its own. The last communication record that does not exist immediately before is obtained, and the communication record from the last communication record to the communication record that exists immediately before the stay determination target communication record is compared with the communication record to be compared. A stay determination method characterized in that it is determined to be a record.

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