JP2016015729A - Server, distribution information creation method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the facility cost or the work load of apparatus installation, when creating information indicating distribution of people in an area.SOLUTION: A server 20 includes a terminal information acquisition unit 23, a region specification unit 24, and a distribution information creation unit 25. The terminal information acquisition unit 23 acquires, from each of a plurality of first terminals 30, the reception strength of radio waves outputted from a second terminal 31 existing on the periphery of the first terminal 30, measured by the first terminal while not performing communication, and the terminal information including the positional information of the first terminal 30. The region specification unit 24 specifies a region where the second terminal 31 is arranged at a distance depending on the measurement information, from the positions of respective first terminals 30. The distribution information creation unit 25 creates information indicating distribution of the positions of the first terminal 30 and second terminal 31, based on the region specified by the region specification unit 24.

Description

  The present invention relates to a server, a distribution information creation method, and a program.

  Patent Document 1 below discloses that a plurality of repeaters are arranged in advance in a venue such as an exhibition, and each repeater measures the intensity of radio waves transmitted from wireless sensors carried by participants. Yes. The analysis device has map information in the hall where the position of each repeater is associated, and collects the intensity of the radio wave received from the wireless sensor from each repeater. And an analyzer specifies the position of a wireless sensor in the point of the distance according to the intensity | strength of the electromagnetic wave which each repeater received.

JP 2009-44394 A

  By the way, the technique of the above-mentioned literature needs to arrange a plurality of repeaters in the venue in advance. Therefore, the equipment cost and the work load of equipment installation are large. Therefore, it is difficult to use the technique of the above-mentioned literature in a temporary store or a facility provided temporarily.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and reduces the equipment cost and equipment installation work load when creating information indicating the distribution of people in the area. Objective.

  A server according to an embodiment for solving the above-described problem is a server that creates information indicating a distribution of positions of terminal devices, and the first terminal device communicates with each of the plurality of first terminal devices. The reception intensity of the radio wave output by the second terminal device existing around the first terminal device, measured by the first terminal device while not performing the measurement, and the position information of the first terminal device An acquisition unit that acquires terminal information including: a specifying unit that specifies an area in which the second terminal device is arranged at a distance according to the reception intensity from the position of each of the first terminal devices; And a creation unit that creates information indicating the distribution of the positions of the first and second terminal devices based on the region specified by the specifying unit.

  According to the server of this embodiment, it is possible to reduce the equipment cost and the equipment installation work load when creating information indicating the distribution of people in the area.

FIG. 1 is a conceptual diagram for explaining an example of an outline of processing in the embodiment. FIG. 2 is a block diagram illustrating an example of a functional configuration of the first terminal device. FIG. 3 is a diagram illustrating an example of the data structure of the access point table held by the map information holding unit. FIG. 4 is a conceptual diagram showing the relationship between RSSI and distance. FIG. 5 is a conceptual diagram for explaining the principle of position measurement. FIG. 6 is a block diagram illustrating an example of a functional configuration of the server. FIG. 7 is a diagram illustrating an example of a data structure of the first terminal table held by the terminal information holding unit. FIG. 8 is a diagram illustrating an example of the data structure of the second terminal table held by the terminal information holding unit. FIG. 9 is a conceptual diagram for explaining an example of a map held by the map information holding unit. FIG. 10 is a conceptual diagram for explaining an example of a cell score calculation method. FIG. 11 is a conceptual diagram for explaining an example of a cell score calculation method. FIG. 12 is a conceptual diagram for explaining an example of a cell score calculation method. FIG. 13 is a diagram illustrating an example of the data structure of the cell table. FIG. 14 is a diagram illustrating an example of the data structure of the pattern table. FIG. 15 is a flowchart illustrating an example of the operation of the server. FIG. 16 is a flowchart illustrating an example of the terminal information registration process (S200). FIG. 17 is a flowchart illustrating an example of the score addition process (S300). FIG. 18 is a hardware configuration diagram illustrating an example of a computer that realizes a server function.

[Outline of processing]
FIG. 1 is a conceptual diagram for explaining an example of an outline of processing in the embodiment. The distribution information creation system 10 in this embodiment includes a server 20 and a plurality of first terminal devices 30.

  Each first terminal device 30 is a smartphone, a mobile phone, a PDA (Personal Digital Assistant), or the like, and has a position measurement function. Each first terminal device 30 communicates via the access point 12 connected to the communication line 11 and transmits communication data to / from the server 20, other servers, or other terminal devices. And receive.

  The second terminal device 31 is a smartphone, a mobile phone, a PDA, or the like, and is a terminal device that does not have a position measurement function or does not have a position measurement function activated. Each second terminal device 31 communicates via the access point 12 connected to the communication line 11, and transmits and receives communication data with the server 20, another server, or another terminal device. I do.

  Each first terminal device 30 measures the received signal strength indicator (RSSI) transmitted by the other first terminal device 30 or the second terminal device 31 during a period of no communication. The terminal information is stored in association with the terminal ID for identifying each terminal device. For example, each of the first terminal device 30 and the second terminal device 31 includes a mobile phone, a PHS (Personal Handy-phone System), a wireless LAN, Bluetooth (registered trademark), Zigbee (registered trademark), etc. (Division Duplex) method.

  In addition, when each of the 1st terminal device 30 and the 2nd terminal device 31 is a terminal device which communicates by FDD (Frequency Division Duplex) system, each 1st terminal device 30 in the frequency of an uplink is transmitted. You may make it measure RSSI of the electromagnetic wave which the other 1st terminal device 30 or the 2nd terminal device 31 transmits by providing the function which measures RSSI.

  Each first terminal device 30 analyzes a signal indicated by a radio wave transmitted by another first terminal device 30 or second terminal device 31, and uses the identification information of the terminal device as the transmission source as the terminal ID. Extract as

  When each of the first terminal device 30 and the second terminal device 31 communicates by, for example, a wireless LAN, each first terminal device 30 transmits, for example, a probe request or a transmission included in the header of the communication frame. The original MAC address information is extracted as the terminal ID. In addition, when each of the first terminal device 30 and the second terminal device 31 communicates using, for example, a mobile phone or PHS communication method, each first terminal device 30 transmits, for example, a location registration transmission packet. The included terminal identification information may be extracted as a terminal ID.

  Each first terminal device 30 calculates the distance to the radio wave source based on, for example, the RSSI of the radio wave transmitted from the radio wave source installed at a known position. And the 1st terminal device 30 calculates the position of the 1st terminal device 30 based on the distance from three or more radio wave transmission sources. In the present embodiment, the radio wave source is, for example, a wireless LAN access point.

  And each 1st terminal device 30 calculates the position of the 1st terminal device 30 for every predetermined timing (for example, every 1 minute), The position which shows the calculated position for the terminal information currently hold | maintained The information is transmitted to the server 20 via the access point 12 together with the information.

  The server 20 holds the terminal information and position information transmitted from each first terminal device 30 via the communication line 11. Then, the server 20 determines the positions of the first terminal device 30 and the second terminal device 31 at predetermined timing (for example, every minute) based on the position information and the terminal information of each first terminal device 30. Create information that shows the distribution of. When the server 20 receives a distribution information request from the first terminal device 30 or the second terminal device 31, the server 20 indicates the distribution of the positions of the first terminal device 30 and the second terminal device 31. Distribution information 40 is created and provided.

  For example, the distribution information 40 divides a target area into small areas (cells) of a predetermined size, and the display pattern of each cell corresponds to the number of terminal devices that may be located in each cell. This is a changed image. Since the first terminal device 30 and the second terminal device 31 are carried by a person, there is a high possibility that a person is also present where the first terminal device 30 and the second terminal device 31 exist. Therefore, the user of the 1st terminal device 30 or the 2nd terminal device 31 can recognize rapidly where many people are gathering by browsing the distribution information 40 in the target area. it can.

[Configuration of terminal device]
FIG. 2 is a block diagram illustrating an example of a functional configuration of the first terminal device 30. The first terminal device 30 includes a communication unit 300, a position calculation unit 301, a map information holding unit 302, and a data processing unit 303.

  The map information holding unit 302 holds map information of a target area and an access point table indicating the position of each access point 12 arranged in the area. FIG. 3 shows an example of the data structure of the access point table 3020 held by the map information holding unit 302.

  In the access point table 3020, for example, as shown in FIG. 3, location information 3022 of the access point 12 is stored in association with the access point ID 3021 for identifying each access point 12. FIG. 3 illustrates an access point table 3020 in which location information 3022 of “(x1, y1)” is stored in association with the access point ID 3021 of “A001”.

  The communication unit 300 communicates with the nearest access point 12 by, for example, a wireless LAN. The communication unit 300 measures the RSSI of the radio wave received from the access point 12 and sends the measured RSSI to the position calculation unit 301 in association with the access point ID of the access point 12.

  Further, the communication unit 300 measures the RSSI of the radio wave transmitted by the other first terminal device 30 or the second terminal device 31. Moreover, the communication part 300 acquires terminal ID of the terminal device of a transmission origin based on the signal which the radio wave which the other 1st terminal device 30 or the 2nd terminal device 31 transmitted shows. Then, the communication unit 300 sends the measured RSSI to the position calculation unit 301 in association with the acquired terminal ID.

  Further, when the communication unit 300 receives terminal information from the position calculation unit 301, the communication unit 300 sends the received terminal information to the server 20 via the access point 12 together with the terminal ID of the first terminal device 30 that is the transmission source. .

  The data processing unit 303 realizes application functions such as a call and a web browser. The communication unit 300 transmits the data received from the data processing unit 303 to another device via the access point 12. In addition, the communication unit 300 sends data received from another device via the access point 12 to the data processing unit 303.

  The position calculation unit 301 receives the RSSI for each first terminal device 30 or the second terminal device 31 and the RSSI for each access point 12 from the communication unit 300. And the position calculation part 301 calculates the distance from each access point 12 based on RSSI of each access point 12 for every predetermined | prescribed timing. The relationship between the RSSI of the radio wave transmitted from the radio wave source and the distance to the source is illustrated in FIG. 4, for example.

  For example, when the RSSI of the radio wave transmitted from the access point 12a is “Ra”, the position calculation unit 301 determines the distance from the first terminal device 30 to the access point 12a based on the relationship illustrated in FIG. Is calculated as “La”. When the RSSI of the radio wave transmitted from the access point 12b is “Rb”, the position calculation unit 301 calculates the distance from the first terminal device 30 to the access point 12b as “Lb”. When the RSSI of the radio wave transmitted from the access point 12c is “Rc”, the position calculation unit 301 calculates the distance from the first terminal device 30 to the access point 12c as “Lc”.

  And the position calculation part 301 calculates | requires the position 41 used as the distance corresponding to RSSI from each access point 12, as shown in FIG. 5, for example, and the calculated | required position 41 is the positional information on the 1st terminal device 30. Calculate as And the position calculation part 301 produces | generates the terminal information containing RSSI for every 1st terminal device 30 or the 2nd terminal device 31 received from the communication part 300, and the calculated positional information, The produced terminal information is used. Send to communication unit 300.

  The second terminal device 31 has the same configuration as the first terminal device 30, but is different from the first terminal device 30 in that it does not have the position calculation unit 301 and the map information holding unit 302. . Further, the communication unit 300 of the second terminal device 31 may not have the RSSI measurement function.

[Server configuration]
FIG. 6 is a block diagram illustrating an example of a functional configuration of the server 20. The server 20 includes a terminal information holding unit 21, a map information holding unit 22, a terminal information acquisition unit 23, an area specifying unit 24, a distribution information creation unit 25, and a communication unit 26.

  The terminal information holding unit 21 holds a first terminal table 210 and a second terminal table 211. FIG. 7 shows an example of the data structure of the first terminal table 210 held by the terminal information holding unit 21. The first terminal table 210 stores a record 2103 as shown in FIG. 7, for example. Each record 2103 stores the terminal ID 2100 for identifying each first terminal device 30, the position information 2101 of the first terminal device 30, and the position information 2101 in the first terminal table 210. And an update time 2102 that indicates the time of day. FIG. 7 shows a first terminal table in which location information 2101 of “(x10, y10)” and update time 2102 of “13:57:47” are stored in association with the terminal ID 2100 of “E001”. 210 is illustrated.

  FIG. 8 shows an example of the data structure of the second terminal table 211 held by the terminal information holding unit 21. For example, as illustrated in FIG. 8, the second terminal table 211 stores an individual terminal table 2111 in association with a terminal ID 2110 that identifies each first terminal device 30. Each individual terminal table 2111 stores a record 2115 as shown in FIG. 8, for example. Each record 2115 includes a terminal ID 2112 that identifies each second terminal device 31, an RSSI 2113, and an update time 2114.

  The RSSI 2113 indicates the reception intensity of the radio wave received from the second terminal device 31 corresponding to the terminal ID 2112 by the first terminal device 30 corresponding to the terminal ID 2110. The update time 2114 indicates the time when the RSSI 2113 is updated. In FIG. 8, the individual terminal table 2111 associated with the terminal ID 2110 of “E001” includes the RSSI 2113 of “−75 dBm” and “13:56:47” in association with the terminal ID 2112 of “E011”. The second terminal table 211 in which the update time 2114 is stored is illustrated.

  FIG. 9 is a conceptual diagram for explaining an example of the map 43 held by the map information holding unit 22. A map 43 indicating a target area is divided into cells 42 which are small areas of a predetermined size, and cell IDs for identifying the respective cells 42 are assigned to the respective cells 42.

  Returning to FIG. 6, the description will be continued. When receiving the terminal information and the terminal ID via the communication line 11, the communication unit 26 sends the received terminal information and the terminal ID to the terminal information acquisition unit 23. When the communication unit 26 receives a distribution information request via the communication line 11, the communication unit 26 sends the received distribution information request to the distribution information creation unit 25. When the communication unit 26 receives distribution information from the distribution information creation unit 25, the communication unit 26 transmits the received distribution information to the distribution information request transmission source via the communication line 11.

  When the terminal information acquisition unit 23 receives the terminal information and the terminal ID from the communication unit 26, the terminal information acquisition unit 23 sets the combination of the terminal ID and the RSSI of the first terminal device 30 from the terminal IDs included in the received terminal information. Is deleted. Specifically, the terminal information acquisition unit 23 includes the terminals included in the first terminal table 210 in the terminal information holding unit 21 among the terminal IDs included in the terminal information received from the communication unit 26. Specify the ID.

  Then, the terminal information acquisition unit 23 deletes the identified terminal ID and the RSSI associated with the terminal ID from the terminal information received from the communication unit 26. The reason for deleting the RSSI of the first terminal device 30 from the terminal information is that the location information of the first terminal device 30 is stored in each terminal table, and the RSSI information from the other first terminal devices 30 This is because it is not necessary to keep the.

  Next, the terminal information acquisition unit 23 refers to the first terminal table 210 in the terminal information holding unit 21 based on the terminal ID received together with the terminal information, and obtains the position information associated with the terminal ID, Update with location information included in terminal information. Then, the terminal information acquisition unit 23 rewrites the update time associated with the updated position information in the first terminal table 210 to the current time.

  Next, the terminal information acquisition unit 23 refers to the second terminal table 211 and identifies the individual terminal table 2111 associated with the terminal ID received together with the terminal information. Then, the terminal information acquisition unit 23 stores the terminal ID and RSSI included in the terminal information received from the communication unit 26 in the specified individual terminal table 2111. Then, the terminal information acquisition unit 23 updates the update time associated with the stored terminal ID and RSSI in the specified individual terminal table 2111 with the current time.

  In addition, when the same terminal ID as the terminal ID included in the terminal information is already stored in the individual terminal table 2111, the terminal information acquisition unit 23 calculates the RSSI associated with the same terminal ID, Update with RSSI included in terminal information. Then, the terminal information acquisition unit 23 updates the update time associated with the updated RSSI with the current time.

  If the individual terminal table 2111 associated with the terminal ID received together with the terminal information does not exist in the second terminal table 211, the terminal information acquisition unit 23 newly creates an empty individual terminal table 2111. The created individual terminal table 2111 stores the terminal ID and RSSI included in the terminal information received from the communication unit 26, and stores the current time as the update time.

  The area specifying unit 24 refers to the first terminal table 210 and the second terminal table 211 in the terminal information holding unit 21 at predetermined timings (for example, every minute), and each of the first terminal devices 30 Using the position information as a reference, the number of terminal devices that may exist is calculated as a score for each cell in the target area. Then, the area specifying unit 24 sends the score calculated for each cell to the distribution information creating unit 25 in association with the cell ID.

  For example, the area specifying unit 24 first initializes the scores of all cells to 0. And the area | region specific part 24 specifies the cell in which the position of each 1st terminal device 30 is referred with reference to the 1st terminal table 210 in the terminal information holding | maintenance part 21, and uses the score of the specified cell. Add one.

  Next, the area specifying unit 24 refers to the second terminal table 211 in the terminal information holding unit 21 to select one terminal ID of each second terminal device 31 one by one, and the same second terminal It is determined whether or not the terminal ID of the device 31 is stored in another individual terminal table 2111. When the terminal IDs of the same second terminal device 31 are stored in three or more individual terminal tables 2111, the area specifying unit 24 is associated with each individual terminal table 2111. 30 terminal IDs are specified in the second terminal table 211.

  Next, the region specifying unit 24 refers to the first terminal table 210 based on the specified terminal ID of the first terminal device 30 and extracts the position information of each first terminal device 30. And the area | region specific part 24 is based on RSSI stored in each separate terminal table | surface 2111, for example from the relationship shown in FIG. 4, distance to each 1st terminal device 30 (For example, in FIG. La, Lb, and Lc) are calculated. Then, for example, as illustrated in FIG. 10, the region specifying unit 24 specifies one cell 42 including the calculated distance from the position of each first terminal device 30, and specifies the specified cell 42. Add 1 to the score.

  In addition, when the terminal IDs of the same second terminal device 31 are stored in the two individual terminal tables 2111, the area specifying unit 24 sets the first terminal device associated with each individual terminal table 2111. 30 terminal IDs are specified in the second terminal table 211. Then, the area specifying unit 24 refers to the first terminal table 210 based on the specified terminal ID of the first terminal device 30 and extracts the position information of each first terminal device 30.

  Next, based on the RSSI stored in each individual terminal table 2111, the area specifying unit 24 determines the distance (for example, FIG. 11) to each first terminal device 30 from the relationship illustrated in FIG. La and Lb) shown in FIG. Then, for example, as illustrated in FIG. 11, the region specifying unit 24 specifies a cell 42 a and a cell 42 b that include positions calculated by the distance from the position of each first terminal device 30. Then, the region specifying unit 24 adds 0.5 to the scores of the two specified cells 42a and 42b.

  When the terminal ID of the same second terminal device 31 is not stored in the other individual terminal table 2111, the area specifying unit 24 associates the first terminal device 30 associated with the individual terminal table 2111. Is identified in the second terminal table 211. Then, the area specifying unit 24 refers to the first terminal table 210 based on the specified terminal ID of the first terminal device 30 and extracts the position information of the first terminal device 30.

  Next, the area specifying unit 24 calculates the distance to the first terminal device 30 based on the RSSI stored in the individual terminal table 2111 from the relationship illustrated in FIG. 4, for example. Then, for example, as illustrated in FIG. 12, the region specifying unit 24 specifies all the cells 42 including the positions that are separated from the position of the first terminal device 30 by the calculated distance. Then, the area specifying unit 24 counts the number of specified cells 42 and adds the reciprocal of the counted number of cells 42 to the score of each specified cell 42.

  In the example of FIG. 12, the area specifying unit 24 specifies 26 cells 42 including positions calculated by the distance La from the position of the first terminal device 30 a. Then, the area specifying unit 24 adds 1/26 = 0.04 (here, an approximate value of the quotient is exemplified) to the score of each specified cell 42.

  When the scores are added to the cells for the terminal IDs of all the second terminal devices 31 in the second terminal table 211, the area specifying unit 24 identifies each cell, for example, as shown in FIG. In association with the cell ID 51 to be transmitted, the cell table 50 storing the score 52 of the cell is sent to the distribution information creation unit 25. FIG. 13 illustrates a cell table 50 in which a score 52 of “1.31” is stored in association with the cell ID 51 of “C001”.

  The distribution information creation unit 25 receives and holds the cell table 50 from the region specifying unit 24. Further, for example, as illustrated in FIG. 14, the distribution information creation unit 25 associates each score range 61 with a pattern table 60 that stores patterns 62 assigned to cells corresponding to the scores in the range 61. keeping. Each pattern 62 stored in the pattern table 60 has a different appearance (for example, color, density, saturation, pattern, etc.) for each score range 61.

  When receiving a distribution information request from the communication unit 26, the distribution information creation unit 25 refers to the cell table 50, extracts a score for each cell, and extracts a pattern corresponding to the extracted score from the pattern table 60. Then, the distribution information creation unit 25 creates distribution information in which the extracted pattern is assigned to each cell, and sends the created distribution information to the communication unit 26.

[Server operation]
FIG. 15 is a flowchart illustrating an example of the operation of the server 20.

  First, the terminal information acquisition unit 23 determines whether or not terminal information and a terminal ID are received from the second terminal device 31 via the communication unit 26 (S100). When the terminal information and the terminal ID are received (S100: Yes), the terminal information acquisition unit 23 executes a terminal information registration process described later (S200), and executes the process shown in step S100 again.

  When the terminal information and the terminal ID are not received (S100: No), the area specifying unit 24 determines whether it is time to calculate the score of each cell (S102). When it is time to calculate the score of each cell (S102: Yes), the area specifying unit 24 refers to the first terminal table 210 and the second terminal table 211 in the terminal information holding unit 21, and is a predetermined time or more. Find the previous update time.

  When the update time before the predetermined time is found in the first terminal table 210, the area specifying unit 24 deletes the record 2103 including the update time from the first terminal table 210 (S104). If an update time before a predetermined time is found in the second terminal table 211, the area specifying unit 24 deletes the record 2115 including the update time from the second terminal table 211 (S104).

  Next, the area specifying unit 24 initializes the scores of all cells to 0 in the cell table 50 (S106). Then, the region specifying unit 24 refers to the first terminal table 210 in the terminal information holding unit 21 and selects one terminal ID of the unselected first terminal device 30 (S108). Then, the area specifying unit 24 extracts the position information associated with the selected terminal ID from the first terminal table 210, and associates the cell with the cell ID of the cell including the position indicated by the extracted position information. 1 is added to the score stored in Table 50 (S110).

  Next, the area specifying unit 24 specifies the individual terminal table 2111 associated with the terminal ID of the first terminal device 30 selected in step S108 in the second terminal table 211. Then, the region specifying unit 24 selects one unselected terminal ID in the specified individual terminal table 2111 (S112). And the area | region specific part 24 performs the score addition process mentioned later (S300).

  Next, the area specifying unit 24 determines whether or not all terminal IDs stored in the individual terminal table 2111 associated with the terminal ID of the first terminal device 30 selected in step S108 have been selected. (S114). When there is an unselected terminal ID in the individual terminal table 2111 (S114: No), the area specifying unit 24 executes the process shown in step S112 again.

  When all the terminal IDs stored in the individual terminal table 2111 are selected (S114: Yes), the area specifying unit 24 determines whether all the terminal IDs stored in the first terminal table 210 have been selected. Is determined (S116). When there is an unselected terminal ID in the first terminal table 210 (S116: No), the area specifying unit 24 executes the process shown in step S108 again. When all the terminal IDs stored in the first terminal table 210 are selected (S116: Yes), the area specifying unit 24 sends the cell table 50 to the distribution information creating unit 25, and the terminal information acquiring unit 23 Then, the process shown in step S100 is executed again.

  When it is not time to calculate the score of each cell (S102: No), the distribution information creation unit 25 determines whether or not a distribution information request is received via the communication unit 26 (S118). When the distribution information request has not been received (S118: No), the terminal information acquisition unit 23 executes the process shown in step S100 again.

  When the distribution information request is received (S118: Yes), the distribution information creation unit 25 refers to the cell table 50, extracts a score for each cell, and extracts a pattern corresponding to the extracted score from the pattern table 60. Then, the distribution information creation unit 25 creates distribution information in which the extracted pattern is assigned to each cell (S120). Then, the distribution information creation unit 25 transmits the created distribution information to the transmission source of the distribution information request via the communication unit 26 (S122), and the terminal information acquisition unit 23 performs the process shown in step S100 again. Run.

[Terminal information registration process]
FIG. 16 is a flowchart illustrating an example of the terminal information registration process (S200).

  First, the terminal information acquisition unit 23 deletes the terminal ID and RSSI of the first terminal device 30 from the terminal IDs included in the terminal information received from the second terminal device 31 via the communication unit 26. (S202). Then, the terminal information acquisition unit 23 refers to the first terminal table 210 in the terminal information holding unit 21 based on the terminal ID received together with the terminal information, and displays the position information associated with the terminal ID as the terminal information. The position information included in the information is updated (S204). Then, the terminal information acquisition unit 23 rewrites the update time associated with the updated position information in the first terminal table 210 to the current time.

  Next, the terminal information acquisition unit 23 refers to the second terminal table 211 to determine whether there is an individual terminal table 2111 associated with the terminal ID received together with the terminal information (S206). . When the individual terminal table 2111 exists in the second terminal table 211 (S206: Yes), the terminal information acquisition unit 23 obtains the terminal ID and the RSSI included in the terminal information received from the communication unit 26. Registration is made in the terminal table 2111 (S208). Then, the terminal information acquisition unit 23 registers the current time at the update time associated with the registered terminal ID and RSSI in the individual terminal table 2111, and ends the processing shown in this flowchart.

  On the other hand, when the individual terminal table 2111 associated with the terminal ID received together with the terminal information does not exist in the second terminal table 211 (S206: No), the terminal information acquisition unit 23 associates with the terminal ID. Then, a new empty individual terminal table 2111 is created in the second terminal table 211 (S210). Then, the terminal information acquisition unit 23 registers the terminal ID and RSSI included in the terminal information in the created individual terminal table 2111 (S212). Then, the terminal information acquisition unit 23 registers the current time as the update time in association with the registered terminal ID and RSSI in the individual terminal table 2111, and ends the processing shown in this flowchart.

[Score addition processing]
FIG. 17 is a flowchart illustrating an example of the score addition process (S300).

  First, the area specifying unit 24 determines whether or not the terminal ID selected in step S112 is also registered in another individual terminal table (S302). When the terminal ID selected in step S112 is also registered in other individual terminal tables (S302: Yes), the area specifying unit 24 sets the terminal ID selected in step S112 to three or more individual terminal tables. It is determined whether it is registered (S304).

  When the terminal ID selected in step S112 is registered in three or more individual terminal tables (S304: Yes), the area specifying unit 24 uses the RSSI registered in each individual terminal table as the individual terminal table. Extracted for each first terminal device 30 corresponding to the table. And the area | region specific | specification part 24 specifies the cell in the distance according to corresponding RSSI from the position of each 1st terminal device 30, as demonstrated, for example in FIG. 10 (S306). Then, the area specifying unit 24 adds 1 to the score associated with the cell ID of the specified cell in the cell table 50 (S308), and the area specifying unit 24 ends the processing shown in this flowchart. .

  If the terminal ID selected in step S112 is registered in less than three individual terminal tables (S304: Yes), that is, if the terminal ID selected in step S112 is registered in two individual terminal tables, The area specifying unit 24 extracts the RSSI registered in each individual terminal table for each first terminal device 30 corresponding to the individual terminal table.

  Then, for example, as described with reference to FIG. 11, the region specifying unit 24 specifies two cells at a distance corresponding to the corresponding RSSI from the position of each first terminal device 30 (S310). Then, the area specifying unit 24 adds 0.5 to the score associated with the cell ID of each specified cell in the cell table 50 (S312), and the area specifying unit 24 is shown in this flowchart. Terminate the process.

  When the terminal ID selected in step S112 is not registered in any other individual terminal table (S302: No), the area specifying unit 24 sets the RSSI associated with the terminal ID selected in step S112. Extract from the individual terminal table. Then, for example, as described with reference to FIG. 12, the region specifying unit 24 specifies a plurality of cells at a distance corresponding to the corresponding RSSI from the position of the first terminal device 30 (S314).

  Next, the area specifying unit 24 counts the number of specified cells (S316). Then, the area specifying unit 24 adds the reciprocal of the counted number of cells to the score associated with the cell ID of each specified cell in the cell table 50 (S318), and the area specifying unit 24 The process shown in this flowchart is terminated.

[Hardware configuration of server]
FIG. 18 is a hardware configuration diagram illustrating an example of a computer 70 that implements the functions of the server 20. The computer 70 includes a central processing unit (CPU) 71, a random access memory (RAM) 72, a read only memory (ROM) 73, a hard disk drive (HDD) 74, a communication interface (I / F) 75, an input / output interface (I). / F) 76 and a media interface (I / F) 77.

  The CPU 71 operates based on a program stored in the ROM 73 or the HDD 74 and controls each part. The ROM 73 stores a boot program executed by the CPU 71 when the computer 70 is started up, a program depending on the hardware of the computer 70, and the like.

  The HDD 74 stores a program executed by the CPU 71, data used by the program, and the like. The communication interface 75 receives data from other devices via the communication line 11 and sends the data to the CPU 71, and transmits the data generated by the CPU 71 to other devices via the communication line 11.

  The CPU 71 controls an output device such as a display and a printer and an input device such as a keyboard and a mouse via the input / output interface 76. The CPU 71 acquires data from the input device via the input / output interface 76. Further, the CPU 71 outputs the generated data to the output device via the input / output interface 76.

  The media interface 77 reads a program or data stored in the recording medium 78 and provides it to the CPU 71 via the RAM 72. The CPU 71 loads the program from the recording medium 78 onto the RAM 72 via the media interface 77 and executes the loaded program. The recording medium 78 is, for example, an optical recording medium such as a DVD (Digital Versatile Disc) or PD (Phase change rewritable disk), a magneto-optical recording medium such as an MO (Magneto-Optical disk), a tape medium, a magnetic recording medium, or a semiconductor memory. Etc.

  The CPU 71 of the computer 70 executes the program loaded on the RAM 72 to thereby execute the terminal information holding unit 21, the map information holding unit 22, the terminal information acquisition unit 23, the region specifying unit 24, the distribution information creating unit 25, and the communication. Each function of the unit 26 is realized. The ROM 73 or the HDD 74 stores data in the terminal information holding unit 21 and the map information holding unit 22.

  The CPU 71 of the computer 70 reads these programs from the recording medium 78 and executes them. However, as another example, these programs may be acquired from other devices via the communication line 11. The data in the terminal information holding unit 21 or the map information holding unit 22 is stored in another server different from the server 20, and the server 20 acquires these data from the other server. Also good.

  The embodiment has been described above. As is clear from the above description, according to the distribution information creation system 10 of the present embodiment, it is possible to reduce the equipment cost and the equipment installation work load when creating information indicating the distribution of people in the area.

[Other forms]
In the above-described embodiment, when the distance between the two first terminal devices 30 is less than a predetermined distance (for example, 0.5 m), the area specifying unit 24 performs the two first terminal devices. The terminal information transmitted from 30 may be handled as terminal information transmitted from one first terminal device 30. Thereby, the server 20 can specify the position of the 2nd terminal device 31 more accurately.

  In this case, the area specifying unit 24 represents the position of one of the first terminal devices 30 or the intermediate point between the positions of the two first terminal devices 30, and represents the position of the two first terminal devices 30. You may make it employ | adopt as a position to perform. Moreover, when the RSSI of the 2nd terminal device 31 contained in the terminal information transmitted from each 1st terminal device 30 differs, you may make it employ | adopt a higher value. Thereby, the server 20 can use the information of the 1st terminal device 30 with high receiving sensitivity.

  Further, the second terminal devices 31 included in the terminal information transmitted from the respective first terminal devices 30 are different (that is, the information of the second terminal device 31 included in one terminal information is different from the other information). Information of the second terminal device 31 included in each terminal information may be merged. This increases the possibility that the server 20 can detect the presence of the second terminal device 31 with higher accuracy.

  Further, the distance between the two first terminal devices 30 is less than a predetermined distance (for example, 0.5 m), and the same information included in the terminal information transmitted from each first terminal device 30 When the RSSI of the second terminal device 31 is different, the area specifying unit 24 calculates the difference between these RSSIs. And the area | region specific | specification part 24 may make it correct | amend which adds the calculated difference about RSSI reported from the 1st terminal device 30 which reported low RSSI from now on. Thereby, the server 20 can correct the difference in reception sensitivity, and can calculate the distance from the second terminal device 31 to the first terminal device 30 with higher accuracy.

  The processing in which each first terminal device 30 calculates the position of the first terminal device 30 based on the radio wave from the access point 12 may be performed by the server 20. In this case, configurations corresponding to the position calculation unit 301 and the map information holding unit 302 are provided in the server 20. The first terminal device 30 measures the RSSI of the radio wave received from the access point 12 and transmits the measured RSSI to the server 20 in association with the access point ID of the access point 12. The server 20 calculates the position of the first terminal device 30 from the set of RSSI and access point ID transmitted from the first terminal device 30.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above-described embodiment. In addition, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Distribution information creation system 11 Communication line 12 Access point 20 Server 21 Terminal information holding | maintenance part 210 1st terminal table 211 2nd terminal table 22 Map information holding part 23 Terminal information acquisition part 24 Area | region specific | specification part 25 Distribution information creation part 26 Communication unit 30 First terminal device 300 Communication unit 301 Position calculation unit 302 Map information holding unit 303 Data processing unit 31 Second terminal device 50 Cell table 60 Pattern table

Claims (9)

A server that creates information indicating the distribution of the location of terminal devices,
A second terminal existing around the first terminal device measured by the first terminal device from each of the plurality of first terminal devices while the first terminal device is not communicating. An acquisition unit that acquires terminal information including reception intensity of radio waves output by the device and position information of the first terminal device;
A specifying unit that specifies an area where the second terminal device is arranged at a distance corresponding to the reception intensity from the position of each of the first terminal devices;
A creating unit that creates information indicating a distribution of positions of the first and second terminal devices based on the region identified by the identifying unit;
A server comprising The specific part is:
A weak value when the positions of the two first terminal devices are less than a predetermined distance and the reception strengths of the second terminal devices acquired from the first terminal devices are different. 2. The server according to claim 1, wherein the reception intensity from the first terminal apparatus that reports the error is corrected by the reception intensity from the first terminal apparatus that reports a strong value. The specific part is:
Dividing a target region indicating a distribution of positions of the first and second terminal devices into a plurality of small regions;
When the terminal information acquired from two or more first terminals does not include the reception intensity from the same second terminal device, the first terminal is provided for each second terminal device. From the position of the device, count the number of the small areas at a distance according to the reception intensity,
Add a value corresponding to the counted number of small areas to the score associated with each counted small area,
The creating unit
The information which shows the distribution of the position of the said 1st and 2nd terminal device is produced by allocating the display pattern according to the said score matched with the said small area for every said small area. 2. The server according to 2. The specific part is:
The server according to claim 3, wherein a reciprocal of the counted number of small areas is added to a score associated with each counted small area. The specific part is:
Dividing a target region indicating a distribution of positions of the first and second terminal devices into a plurality of small regions;
When the reception strength from the same second terminal device is included in the terminal information acquired from the two first terminal devices, for the same second terminal device, From the respective positions of the two first terminal devices, the two small areas located at a distance corresponding to the respective reception strengths are specified, and the score associated with each of the specified small areas, Add the value obtained by dividing the predetermined value by 2,
The creating unit
The information which shows the distribution of the position of the said 1st and 2nd terminal device is produced by assigning the display pattern according to the said score matched with the said small area for every said small area. 4. The server according to any one of 4. The specific part is:
Dividing a target region indicating a distribution of positions of the first and second terminal devices into a plurality of small regions;
When the terminal information acquired from the three first terminal devices includes the reception strength from the same second terminal device, for the same second terminal device, One of the small regions at a distance corresponding to each of the reception strengths is identified from the respective positions of the three first terminal devices, and a score associated with the identified small region is set to a predetermined value. Add the values,
The creating unit
The information which shows the distribution of the position of the said 1st and 2nd terminal device is produced by assigning the display pattern according to the said score matched with the said small area for every said small area. The server according to any one of 5. The display pattern is
The server according to any one of claims 3 to 6, which is a color, density, saturation, or pattern according to the score. A distribution information creation method in a server for creating information indicating the distribution of the position of a terminal device,
The server is
A second terminal existing around the first terminal device measured by the first terminal device from each of the plurality of first terminal devices while the first terminal device is not communicating. Obtaining terminal information including reception intensity of radio waves output by the device and position information of the first terminal device;
Identifying a region where the second terminal device is arranged at a distance corresponding to the reception intensity from the position of each of the first terminal devices;
And a step of creating information indicating the distribution of the positions of the first and second terminal devices based on the identified region. A program that causes a computer to function as a server that creates information indicating the distribution of positions of terminal devices,
A second terminal existing around the first terminal device measured by the first terminal device from each of the plurality of first terminal devices while the first terminal device is not communicating. A procedure for acquiring terminal information including reception intensity of radio waves output by the device and position information of the first terminal device;
A procedure for specifying an area where the second terminal device is arranged at a distance corresponding to the reception intensity from the position of each of the first terminal devices;
A program for causing the computer to implement a procedure for creating information indicating the distribution of the positions of the first and second terminal devices based on the identified area.

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