JP2021150780A - Information transmission terminal and information transmission method - Google Patents

Abstract

To provide an information transmission terminal that appropriately transmits information even when the information transmission terminal is included in an aggregation of a plurality of information transmission terminals.SOLUTION: A position identification system 10 includes information transmission terminals (compact terminals 20A to 20D), each of which includes: a first information transmission section for transmitting information including an own individual ID for identifying an own possessor and an own operation state to another terminal using a first wireless communication system; an information reception section for receiving another individual ID for identifying a possessor of the other terminal and an operation state of the other terminal from the other terminal using the first wireless communication system; and a second information transmission section for broadcasting a data frame including the own individual ID and data showing that the terminal is an access point of wireless communication using a second wireless communication system with power consumption larger than that of the first wireless communication system. The second information transmission section, on the basis of the own operation state and the operation state of the other terminal, adds the other individual ID to the data frame of the second wireless communication system before broadcasting the data frame.SELECTED DRAWING: Figure 1

Description

The present invention relates to an information transmission terminal for transmitting information of a holder and a method for transmitting the information.

In recent years, for example, in order to protect children and the elderly, the location of the child or the elderly is specified via mobile phone network communication by having the child or the elderly possess a small terminal and transmitting the position of their own GPS (Global Positioning System). The service is widespread.

Further, for example, Patent Document 1 describes BLE (Bluetooth (registered trademark) Low Energy) or Wi-Fi (Wireless Fidelity: 802.11) fixed around a mobile terminal having an LPWA (Low Power Wide Area) communication function. A mobile terminal that receives a beacon transmitted from an access point (standard communication) is disclosed. A system for managing the location information of a mobile terminal having a high power consumption and not having a GPS function by transferring the Wi-Fi unique number or the BLE unique number received by the mobile terminal to a server via an LPWA relay device is disclosed. ing.

JP-A-2018-129598

In a system using a mobile terminal that receives a beacon such as Wi-Fi as in the system of Patent Document 1, for example, when a plurality of mobile terminals are assembled, each of the plurality of mobile terminals is the same. When a communication radio wave of a communication standard is transmitted, the communication radio waves may interfere with each other. As a result, the communication radio wave may not reach the relay device properly, and communication for identifying the location may be hindered.

The present invention has been made in view of the above points, and provides an information transmission terminal and an information transmission method for appropriately transmitting information even when a plurality of information transmission terminals are gathered in a position identification system. With the goal.

The invention according to claim 1 comprises a first information transmitting unit that transmits information including its own individual ID that identifies its own holder and its own operating state to another terminal by a first wireless communication method, and the above-mentioned invention. An information receiving unit that receives another individual ID that identifies the holder of the other terminal from another terminal and the operating state of the other terminal by the first wireless method, and the own individual ID and itself that communicate wirelessly. The second transmission includes a second transmitter that broadcasts a data frame including data indicating that it is an access point by a second wireless system that consumes more power than the first wireless communication system. The unit is characterized in that the other individual ID is added to the data frame in the second wireless system and broadcast based on the operating state of the own and the operating state of the other terminal.

The invention according to claim 9 comprises a first information transmitting unit that transmits information including its own individual ID for identifying its own holder and its own operating state to another terminal by a first wireless communication method, and the above-mentioned invention. An information receiving unit that receives another individual ID that identifies the holder of the other terminal from another terminal and the operating state of the other terminal by the first wireless method, and the own individual ID and itself that communicate wirelessly. The second transmission includes a second transmitter that broadcasts a data frame including data indicating that it is an access point by a second wireless system that consumes more power than the first wireless communication system. The unit is characterized in that broadcasting of a data frame in the second wireless system is started or stopped based on the operating state of itself and the operating state of the other terminal.

The invention according to claim 10 is an information transmission method in which an information transmitting terminal transmits information including its own individual ID that identifies its own holder and another individual ID that identifies the holder of another terminal. A first transmission step of transmitting information including the own individual ID and its own operating state for identifying its own holder to another terminal by the first wireless communication method, and the other terminal from the other terminal. A reception step for receiving the operating state of the other individual ID and the other terminal by the first wireless method, and data indicating that the own individual ID and itself are access points for wireless communication. The second transmission step includes a second transmission step of broadcasting a data frame including the above in a second wireless system that consumes more power than the first wireless communication system, and the second transmission step is in its own operating state. Based on the above and the operating state of the other terminal, the data frame in the second wireless system is added with the other individual ID and broadcast.

The invention according to claim 11 is an information transmission program executed by a computer, and information including the computer, the own individual ID that identifies the holder of the other terminal, and the operating state of the computer. The first wireless communication method, the first transmission step, the other individual ID for identifying the holder of the other terminal from the other terminal, and the operating state of the other terminal A second radio that consumes more power than the first wireless communication method includes a reception step received by the communication method and a data frame including the own individual ID and data indicating that the user is an access point for wireless communication. A second transmission step of broadcasting by the communication method is executed, and the second transmission step is performed by the second wireless communication method based on the operating state of the own and the operating state of the other terminal. It is characterized in that the other individual ID is added to the data frame of the above and broadcast.

It is a figure which shows the structure of the position identification system 10 which concerns on embodiment of this application. It is a figure which shows the structure of the small terminal 20 which concerns on embodiment of this application. It is a figure which shows the example of the shared data SD of a small terminal 20 recorded in the data sharing part 24 of the small terminal 20 which concerns on embodiment of this application. It is a figure which shows the example of the SSID included in the data frame generated by the small terminal 20 which concerns on embodiment of this application. The information transmission flow RT1 in which the small terminal 20 according to the embodiment of the present application broadcasts a data frame. It is a figure which shows the structure of the peripheral terminal 30 which concerns on embodiment of this application. It is a figure which shows the example of the terminal position-related information PD generated by the peripheral terminal 30 which concerns on embodiment of this application. This is a position-related information transmission flow RT2 in which the peripheral terminal 30 according to the embodiment of the present application transmits the terminal position-related information PD. It is a figure which shows the structure of the server 40 which concerns on embodiment of this application. It is a figure exemplifying a mode that the position specifying part 43 of the server 40 which concerns on embodiment of this application specifies the position of a small terminal 20. It is a figure exemplifying a mode that the information determination unit 47 which concerns on embodiment of this application determines whether the information contained in a terminal position-related information PD is appropriate. It is a figure exemplifying a mode that the information determination unit 47 which concerns on embodiment of this application determines whether the information contained in the terminal position-related information PD transmitted from a plurality of terminal types is appropriate. This is a position identification information generation flow RT3 in which the server 40 according to the embodiment of the present application generates and stores the position identification information.

Examples of the present invention will be described in detail below. In the following description and the accompanying drawings, the same reference numerals are given to substantially the same or equivalent parts.

FIG. 1 is a diagram showing a configuration of a position identification system 10 according to an embodiment of the present application.

The position identification system 10 receives, for example, the terminal information of the plurality of small terminals 20A to 20D possessed by each of the plurality of owners H1 to H4 locally gathered, and the terminal information of the plurality of small terminals 20A to 20D, and relates to the position. A peripheral terminal 30 that transmits information, a server 40 that identifies the position of the small terminal 20 based on information about the position transmitted from the peripheral terminal 30, and a guardian terminal that acquires the position of the small terminal 20 specified by the server 40. It has 50 and. The peripheral terminal 30 and the guardian terminal 50 are configured to be able to communicate with the server 40 via the network NW.

The small terminal 20 as an information transmission terminal is, for example, a terminal device having communication functions of two types of wireless communication methods.

As the first wireless communication method, the small terminal 20 has, for example, a BLE function. In the small terminal 20, the information of the individual ID that identifies each of the owners H1 to H4 and the information of each operating state among the plurality of small terminals 20A to 20D are advertised packets (hereinafter referred to as BLE data). The information is shared by transmitting and receiving in the manner of).

As a second wireless communication method, the small terminal 20 has, for example, a wireless LAN (Local Area Network) function compliant with IEEE802.11 standard communication. Further, in the second wireless communication method, the small terminal 20 operates as an access point mode in which it is an access point for wireless communication. The small terminal 20 generates a data frame conforming to the IEEE802.11 standard communication and broadcasts the data frame to the surroundings.

The information shared by the small terminals 20A to 20D by the BLE includes, for example, individual ID data that identifies the respective owners H1 to H4 of the small terminals 20A to 20D, and an emergency flag as the operating state of the small terminals 20A to 20D. , Information such as the remaining battery level of each small terminal and whether or not broadcast communication is being performed is shared as shared information.

Further, the small terminal 20 has one of the plurality of small terminals 20A to 20D shared based on the information on the operating state shared by the BLE among the plurality of small terminals 20A to 20D. A data frame including an individual ID that identifies the persons H1 to H4 is generated, and the data frame is broadcast to the surroundings. This makes it possible to prevent carrier waves from interfering with each other due to a plurality of broadcast communications.

Note that FIG. 1 describes an example in which the small terminal 20A among the plurality of small terminals 20A to 20D broadcasts a data frame to the surroundings.

Further, in this embodiment, the first communication method for communicating between the terminals of the small terminals 20 is defined as BLE, and the second communication method for broadcasting a data frame is described as wireless communication compliant with the IEEE 802.11 standard communication. do. However, the respective communication methods of the first and second communication methods are not limited to this. Specifically, for example, each of the first and second communication methods is wireless communication compliant with the IEEE802.11 communication standard, BLE or LoRaWAN (Long Range Wide Area) compliant with the Bluetooth® 4.0 standard. It may be any of LPWA such as Network) and Sigfox. The first communication method is a communication method having a narrower communication range and less power consumption than the second communication method, and may be any mode of D2D (Device To Device) communication for transmitting and receiving information between small terminals. Further, the second communication method may broadcast data frames in a wider range than the first communication method even if the power consumption in communication is larger than that of the first communication method.

In other words, the communicable range of the first communication method is narrower than the communicable range of the second communication method.

Further, in the data frame conforming to the IEEE802.11 communication standard broadcast by the small terminal 20, the service ID for using the position identification system 10, the individual ID for identifying the owners H1 to H4 including itself, and the owner H1 Information such as an SSID (Service Set IDentifier) including an emergency flag notifying that any one of ~ H4 is an emergency, and a MAC address (Media Access Control address) of the small terminal 20A broadcasting is included.

The peripheral terminal 30 as an information transmission / reception device is, for example, a terminal device such as a PC, a smartphone, or a tablet terminal owned by a residential NH, a store NS, or a pedestrian P in the vicinity of the small terminal 20A. The peripheral terminal 30 is configured to be equipped with a wireless LAN (Local Area Network) function compliant with the IEEE802.11 communication standard so that it can recognize an access point of the communication standard and can connect to the Internet by itself. There is.

Although the individual ID is not directly linked to the identification of the individual, it is preferable that the data frame broadcast by the small terminal 20A can be acquired or recognized only by the specific peripheral terminal 30 for safety. For example, it is preferable to make the system so that only the peripheral terminal 30 in which the application software that enables the position identification system 10 can be used can recognize the data frame broadcast by the small terminal 20A.

When the peripheral terminal 30 acquires the data frame broadcast from the small terminal 20A, in addition to the SSID and MAC address of the small terminal 20A included in the data frame, the date and time, the place, and the reception electric field of the data frame when the data frame is acquired. Generate terminal location related information with level information. Further, the peripheral terminal 30 transmits the terminal position-related information via the network NW.

The network NW is, for example, an Internet connection network to which peripheral terminals 30 are connected via a communication line such as a dedicated line including a wired line and a wireless line or a public communication line network. The connection between the peripheral terminal 30 and the network NW is, for example, a network interconnection service provided by an ISP (Internet Service Provider), a LAN via a PC connected by the ISP, or a WAN (Wide Area Network) provided by a telecommunications carrier. And so on. The means for the peripheral terminal 30 to connect to the network NW is not limited to the above, and the peripheral terminal 30 may be connected to the Internet connection network.

The server 40, which is a server device, receives the terminal position-related information transmitted by the peripheral terminals 30 via the network NW, specifies the positions of the plurality of small terminals 20A to 20D based on the terminal position-related information, and performs a time series. It is a data server that stores the positions of each of the plurality of small terminals 20A to 20D in order.

The server 40 can receive terminal position-related information transmitted by the peripheral terminals 30 via a communication protocol such as TCP / IP via the network NW. Further, the positions of the plurality of small terminals 20A to 20D are set based on the reception time, the reception position, and the reception electric field level when each of the peripheral terminals 30 included in the received terminal position related information receives the data frame from the small terminal 20A. Identify. In addition, the positions of the specified plurality of small terminals 20A to 20D are stored in chronological order. Further, when the emergency flag included in the SSID of the small terminal 20A included in the terminal position-related information indicates an emergency situation, the server 40 is, for example, the owners H1 to H4 of the plurality of small terminals 20A to 20D. Make an emergency contact with the school SC where you are present or the relevant organizations such as the police station PS in the vicinity of the specified location.

The guardian terminal 50 as an acquisition terminal is, for example, a terminal installed in a home HM and possessed by a family member of any of the owners H1 to H4 of the plurality of small terminals 20A to 20D. The guardian terminal 50 is configured to be able to access the server 40 via the network NW and acquire the position of any of the small terminals 20A to 20D specified by the server 40. The guardian terminal 50 is not limited to terminal types such as PCs, smartphones, and tablet terminals, and may be able to connect to the network NW, which is an Internet connection network, and can access the server 40.

FIG. 2 is a diagram showing a configuration of a small terminal 20 according to an embodiment of the present application.

The small terminal 20 acquires the terminal information of the other small terminal 20 by the inter-terminal communication transmission unit 21 that transmits its own terminal information to the other small terminal 20 by BLE and the BLE from the other small terminal 20. The terminal-to-terminal communication acquisition unit 23, the data sharing unit 24 that stores its own terminal information and the terminal information acquired by the terminal-to-terminal communication acquisition unit 23, the data frame generation unit 25 that generates a data frame, and the generated data. It has a data frame transmission unit 27 that broadcasts a frame, and an emergency recognition unit 29 that notifies the holder H that an emergency is in an emergency situation.

The terminal-to-terminal communication transmission unit 21 as the first information transmission unit has its own individual ID that identifies the owner of its own small terminal 20, the remaining battery level as the operating state of its own small terminal 20, and its own small size. BLE data including information on whether the terminal 20 is broadcasting is generated, and the BLE data is transmitted to another small terminal 20. The time interval for transmitting BLE data can be arbitrarily set. For example, the terminal-to-terminal communication transmission unit 21 continuously, intermittently or intermittently transmits BLE data. Specifically, for example, the transmission of BLE data may be performed at any time, or may be performed at fixed intervals such as every 5 minutes. Further, the inter-terminal communication transmission unit 21 may automatically change the time interval for transmitting BLE data according to the remaining battery level of the small terminal 20.

The terminal-to-terminal communication acquisition unit 23 as an information receiving unit acquires BLE data transmitted by another small terminal 20 within the communication range of BLE, and identifies the owner of the other small terminal 20 included in the BLE data. Other individual IDs, the remaining battery level of the other small terminal 20 as an operating state, and information on whether the other small terminal 20 is broadcasting are acquired. The terminal-to-terminal communication acquisition unit 23 supplies the acquired information to the data sharing unit 24. The BLE data acquisition interval of the terminal-to-terminal communication acquisition unit 23 can be arbitrarily set. For example, the terminal-to-terminal communication acquisition unit 23 acquires BLE data continuously, intermittently, or intermittently. Specifically, for example, the acquisition of BLE data may be performed at any time, or may be performed at fixed intervals such as every 5 minutes. Further, the terminal-to-terminal communication acquisition unit 23 may automatically change the time interval for acquiring BLE data according to the remaining battery level of the small terminal 20.

The data sharing unit 24 is included in the terminal information of its own small terminal 20, its own individual ID, the remaining battery level, information on whether or not it is broadcasting, and the BLE data acquired by the terminal-to-terminal communication acquisition unit 23. In addition to the small terminal 20 of the small terminal 20, the individual ID, the remaining battery level, and information on whether the other small terminal 20 is broadcasting are recorded.

When the data frame generation unit 25 determines that the battery level of its own small terminal 20 is the highest among the battery levels of itself and other small terminals 20 recorded in the data sharing unit 24, the data frame generation unit 25 broadcasts a data frame. Generate. Specifically, it is an emergency situation that any of the service ID indicating that the location identification system 10 is used, the own individual ID, the other individual ID, and the owner of the self or the other small terminal 20 acquired by BLE is in an emergency situation. An SSID including an emergency flag to notify is generated, a data frame including the SSID is generated, and the data frame is supplied to the data frame transmission unit 27. That is, the data frame generated by the data frame generation unit 25 is generated in a manner indicating that the small terminal 20 operates as an access point. If the remaining battery power is the same, the individual IDs may be digitized and compared, and the one with the higher numerical value may be the access point.

Further, the data frame generation unit 25 generates a data frame when it is not determined that the remaining battery level of the own small terminal 20 is the largest among the remaining battery levels of itself and other small terminals 20 recorded in the data sharing unit 24. The processing of the unit 25 and the data frame transmission unit 27 is stopped, and the broadcast of the data frame is stopped.

The data frame transmission unit 27 as the second transmission unit broadcasts the data frame generated by the data frame generation unit 25 to the surroundings. The time interval for broadcasting can be set arbitrarily. For example, the data frame transmitting unit 27 broadcasts data frames continuously, intermittently, or intermittently. Specifically, for example, the broadcast may be performed at any time, or may be performed at fixed intervals such as every 5 minutes. Further, the data frame transmitting unit 27 may automatically change the time interval for broadcasting according to the remaining battery level of the small terminal 20.

The emergency recognition unit 29 presses a button or a string provided on the small terminal 20 when, for example, any of the owners of the small terminal 20 sharing information on BLE falls into an emergency or detects a danger. Recognize that an emergency has occurred for the holder by performing an action such as pulling. When the emergency recognition unit 29 is a small terminal 20 that broadcasts a data frame when it recognizes an emergency situation, the emergency recognition unit 29 instructs the data frame generation unit 25 to generate a data frame so that the emergency flag indicates an emergency situation. If the terminal 20 is not the small terminal 20 that broadcasts the data frame, the BLE data is generated so that the emergency flag included in the BLE data indicates an emergency situation, and the BLE data is transmitted.

Further, at this time, the small terminal 20 in which an emergency has occurred or the small terminal 20 that has acquired BLE data including an emergency flag indicating an emergency commands the data frame transmitting unit 27 to continuously transmit the data frame. You may. Further, along with the transmission of the data frame, an alarm may be sounded at a loud volume through a speaker (not shown) to notify the surroundings of the danger.

In other words, the inter-terminal communication transmitter 21 that transmits information including its own individual ID that identifies its own holder to another small terminal 20 and its own remaining battery level by BLE, and other small terminals 20 The inter-terminal communication acquisition unit 23 that receives the other individual ID that identifies the holder of the small terminal 20 and the remaining battery level of the other small terminal 20 by BLE, and the data frame including the own individual ID and SSID consume more power than BLE. A data frame transmitting unit 27 that broadcasts on a large amount of wireless LAN is included, and the data frame transmitting unit 27 puts a data frame on a wireless LAN based on its own battery level and the battery level of another terminal. Broadcast by adding other individual IDs.

In addition, the inter-terminal communication transmitter 21 that transmits information including its own individual ID that identifies its own holder to another terminal and its own remaining battery level by BLE, and another small terminal 20 to another small terminal 20. The inter-terminal communication acquisition unit 23 that receives the remaining battery level of the other individual ID and the other small terminal 20 that identifies the holder by BLE, and the wireless that consumes more power than the BLE for the data frame including the own individual ID and SSID. The data frame transmitting unit 27 including the data frame transmitting unit 27 that broadcasts on the LAN, the data frame transmitting unit 27 broadcasts the data frame on the wireless LAN based on the remaining battery level of itself and the remaining battery level of the other small terminal 20. Start or stop.

FIG. 3 is a diagram showing an example of a shared data SD of the small terminal 20 according to the embodiment of the present application.

The shared data SD includes, for example, information on the individual ID of each of the small terminals 20 communicating the BLE data, the remaining battery level, and the status in which each of the small terminals 20 broadcasts a data frame.

The individual ID is a unique ID given to each of the small terminals 20. By registering the personal ID in the location identification system 10, it is possible to identify the holder H from the individual ID in association with the personal information of the holder H. As for the individual ID, since 5 characters are used in 81 character types that can be used for BLE and SSID, it is possible to define about 3 billion people.

The remaining battery level indicates the remaining battery level of each of the small terminals 20 communicating the BLE data. The small terminal 20 determines whether or not to broadcast the data frame based on the remaining battery level recorded in the shared data SD. Specifically, when it is determined that the remaining battery level of itself is the largest among the remaining battery levels recorded in the shared data SD, it is determined that the small terminal 20 itself broadcasts a data frame.

The broadcast status indicates whether each of the small terminals 20 communicating the BLE data is broadcasting a data frame. When none of the small terminals 20 broadcasts the data frame or when a plurality of small terminals 20 broadcast the data frame, it is determined whether or not the small terminal 20 broadcasts the data frame based on the remaining battery level.

FIG. 4 is a diagram showing an example of the data structure of the SSID included in the data frame generated by the small terminal 20 according to the embodiment of the present application. The SSID generates a data frame when the data frame generation unit 25 determines in the shared data SD that it is a small terminal 20 that broadcasts the data frame.

When the data frame is generated as a beacon frame conforming to the IEEE802.11 communication standard, for example, the data frame is configured to include an SSID of up to 32 characters and the MAC address of the small terminal 20. In this embodiment, the SSID included in the data frame identifies, for example, the owners of the service ID header HE indicating that the position identification system 10 is used and the small terminal 20 communicating the BLE data. It is composed of an individual ID data string ID to be used, an emergency flag SF for notifying that one of the holders is in an emergency, a spare flag RF, and an underscore E for separating each element.

In the example shown in FIG. 4, the service ID header HE has 3 characters, the own individual ID data IDA has 5 characters, the emergency flag SF has 1 character, the underbar E has a total of 3 characters, and the spare flag RF has 20 characters.

The individual ID data string ID is generated so that individual IDs including itself of the shared data SD are continuously described. Specifically, first, the own individual ID data IDA is generated, and then the second individual ID data IDB and the third individual ID data IDC are continuously generated. Since the maximum number of characters of the SSID is 32, the individual IDs of the other small terminals 20 after the second individual ID data IDB are generated by reducing the number of characters of the spare flag RF. Further, in this embodiment, the number of small terminals 20 that can be broadcast as a data frame is a maximum of five including itself. When 6 or more small terminals 20 are shared by BLE data, after time-dividing to generate and broadcast an SSID including the individual IDs of themselves and the 2nd to 5th small terminals 20, the self and 6 small terminals 20 You may generate and broadcast the SSID including the individual ID of the small terminal 20 after the eyes.

In this embodiment, the IEEE802.11 communication standard is adopted as the second communication method for broadcasting the data frame, and a data frame having an SSID of up to 32 characters conforming to the communication standard will be described. Communication standards are not limited to this. For example, when BLE is adopted as the second communication method for broadcasting a data frame, a data frame in which the above information is included in the Bluetooth (registered trademark) device name may be generated. Further, even when a data frame of another communication standard is used, it is sufficient to generate a data frame in which the above information is included in the device name or the like of the small terminal 20.

In other words, the data frame has an SSID indicating an identifier as an access point of the small terminal 20, and the SSID includes a self-individual ID and another individual ID.

In addition, the data frame includes information on an emergency flag in the SSID, which indicates whether or not one of the holders of the small terminal 20 or the holder of the other small terminal 20 is in an emergency.

Further, the data frame includes the MAC address of the small terminal 20 to be broadcast.

FIG. 5 is an information transmission flow RT1 in which the small terminal 20 according to the embodiment of the present application broadcasts a data frame. The information transmission flow RT1 is repeatedly executed while the small terminal 20 is running. Further, the repetition of the information transmission flow RT1 may be repeatedly executed at any time. Further, the repetition interval may be set to be fixed at intervals of 5 minutes or the like, or may be automatically set according to the remaining battery level of the small terminal 20.

First, as a first transmission step, the terminal-to-terminal communication transmission unit 21 transmits the individual ID of its own small terminal 20, the remaining battery level, and the BLE data of whether or not it is broadcasting a data frame to the surroundings by BLE (). Step S101).

Next, as a receiving step, the terminal-to-terminal communication acquisition unit 23 receives the individual ID of the other small terminal 20, the remaining battery level, and the BLE data of whether or not the data frame is being broadcast by the other small terminal 20 by BLE. It is in a standby state so that it can be received (step S102).

Next, the terminal-to-terminal communication acquisition unit 23 determines whether or not BLE data has been received from the other small terminal 20 (step S103).

If it is not determined in step S103 that the BLE data has been received from the other small terminal 20 (step S103: No), the data frame generation unit 25 determines that there is no other small terminal 20 in the vicinity and owns its own individual ID. Generate a data frame containing only (step S104). It should be noted that this process may be determined based on the fact that the BLE data has not been received from the other small terminal 20 for a predetermined time.

Next, as a second transmission step, the data frame transmission unit 27 broadcasts the data frame generated by the data frame generation unit 25 to the surroundings (step S105).

If it is determined in step S103 that BLE data has been received from another small terminal 20 (step S103: Yes), the terminal-to-terminal communication acquisition unit 23 records the acquired BLE data in the data sharing unit 24 (step S103: Yes). Step S106).

Next, the data frame generation unit 25 reads the shared data SD of the data sharing unit and determines whether or not its own battery level is the highest among itself and the other small terminals 20 acquired by the BLE data (step S107). ).

If it is not determined in step S107 that the remaining battery level is the highest (step S107: No), the data frame generation unit 25 determines that it is not a small terminal that broadcasts the data frame, and returns to the process of step S101. ..

If it is determined in step S107 that the remaining battery level is the highest (step S107: Yes), the data frame generation unit 25 determines that it is a small terminal that broadcasts the data frame, and it and itself. A data frame including an individual ID of another small terminal 20 recorded in the shared data SD is generated (step S108).

Next, as a second transmission step, the data frame transmission unit 27 broadcasts the data frame generated by the data frame generation unit 25 to the surroundings (step S109).

Next, the data frame generation unit 25 determines whether all the individual IDs recorded in the shared data SD have been broadcast in the data frame (step S110).

In step S110, when it is determined that all the individual IDs recorded in the shared data SD have been broadcast in the data frame (step S110: Yes), the data frame generation unit 25 ends the information transmission flow RT1.

Further, in step S110, when it is not determined that all the individual IDs recorded in the shared data SD have been broadcast in the data frame (step S110: No), the data frame generation unit 25 returns to the process of step S108 and returns to itself and Regenerate individual IDs that have not been broadcast in the data frame.

By executing the above process, the small terminal 20 can share the terminal information of another small terminal 20 with BLE and broadcast the data frame.

In other words, it is an information transmission method in which the small terminal 20 transmits information including its own individual ID that identifies its own holder and another individual ID that identifies the holder of another small terminal 20, and is another small terminal. The first transmission step of transmitting information including its own individual ID and its own remaining battery level by BLE for identifying its own holder in 20, and identifying the holder of another small terminal 20 from another small terminal 20. A reception step of receiving the remaining battery level of another individual ID and another small terminal 20 by BLE, and a second transmission step of broadcasting a data frame including its own individual ID and SSID on a wireless LAN that consumes more power than BLE. The second transmission step includes, and broadcasts by adding another individual ID to the data frame in the wireless LAN based on the remaining battery level of the own battery and the remaining battery level of the other small terminal 20.

FIG. 6 is a diagram showing a configuration of a peripheral terminal 30 according to an embodiment of the present application.

The peripheral terminal 30 has a data frame acquisition unit 31 that acquires a data frame broadcast by the small terminal 20, and a terminal position by extracting necessary information from the data frame and adding information on the data frame reception status of the peripheral terminal 30. It has a position-related information generation unit 33 that generates related information, and a position-related information transmission unit 35 that transmits the terminal position-related information to the server 40 via the network NW.

The data frame acquisition unit 31 confirms whether there is an access point around the peripheral terminal 30. When the small terminal 20 recognizes a data frame indicating an access point to be broadcast, the data frame is acquired and supplied to the position-related information generation unit 33. Further, the reception time and the reception electric field level when the data frame is acquired are supplied to the position-related information generation unit 33. It should be noted that the confirmation of whether the peripheral terminal 30 has an access point in the vicinity can be arbitrarily set. Peripheral terminals 30 may be set to check the reception status of data frames at any time. In addition, the time interval to be confirmed may be set by the owner of the surrounding terminal 30, fixed at every 5 minutes, or automatically set depending on the terminal type such as a PC, smartphone, or tablet terminal. You may.

The position-related information generation unit 33 extracts necessary information including the SSID of the small terminal 20 from the data frame acquired by the data frame acquisition unit 31. Further, to the extracted information, information on the reception time, the reception electric field level, and the reception position of the surrounding terminal 30 when the data frame supplied from the data frame acquisition unit 31 is received is added, and the terminal position related information is generated. Then, it is supplied to the position-related information transmission unit 35.

The position-related information transmission unit 35 transmits the terminal position-related information generated by the position-related information generation unit 33 to the server 40 via the network NW to which it is connected.

FIG. 7 is a diagram showing an example of terminal position-related information PD generated by the peripheral terminal 30 according to the embodiment of the present application.

The terminal position-related information PD includes a data frame acquisition time AT, which is information on the peripheral terminal 30 that generated and transmitted the terminal position-related information PD, an acquisition position AP, and a TT indicating the terminal type of the peripheral terminal 30.

The acquisition position AP is the position of the surrounding terminals 30 when the data frame is received from the terminals, and is, for example, latitude / longitude information by GPS or the like. The position information is not limited to latitude and longitude. For example, the acquisition position AP may be a facility name that can specify an address such as the address of a residence or store where the surrounding terminal 30 is installed, the name of an apartment, or the name of a store. Further, in the case of a PC, the acquisition position AP may be set in advance by the owner of the peripheral terminal 30, the IP address when connected to the Internet, and the automatic acquisition position from a different device connected to the peripheral terminal 30. It may be obtained by. Further, in the case of a laptop PC, smartphone or tablet terminal equipped with a GPS function, the latitude and longitude may be automatically acquired in conjunction with the GPS function.

The terminal type TT indicates, for example, the type of the terminal of the peripheral terminal 30. Specifically, it may indicate a desktop PC, a laptop PC, a smartphone, a tablet terminal, or the like. Further, it may be possible to determine whether or not the peripheral terminal 30 has a GPS function, whether the acquisition position AP is a position obtained in conjunction with the GPS function, or whether the acquisition position AP is manually input by the owner. Further, it may be simply information on whether the terminal is a mobile terminal or a fixed terminal.

In this embodiment, the peripheral terminal 30 has a first group including seven small terminals 20 as individual IDs aaaaa, bbbbb, ccccc, ddddd, eeee, fffff, and gggggg, and 11111, 2222 as individual IDs. A case where a data frame with a second group including the three small terminals 20 of 33333 and the second group is acquired at the same time or within a predetermined time width will be described. Further, the case where the small terminal 20 that broadcasts the data frame is a small terminal 20 having an individual ID aaa in the first group and a small terminal 20 having an individual ID 11111 in the second group will be described. do.

The terminal position-related information PD includes information on a plurality of small terminals 20 acquired by the surrounding terminals 30. For example, the first SSID data SI1 included in the first data frame of the first group of small terminals 20 acquired by the peripheral terminal 30, the reception electric field level RL1 of the first data frame, and the first MAC address MA1. The first small terminal information is extracted from the first data frame and added after the information of the surrounding terminals 30.

Further, in the first group, two data frames are broadcast in a time division manner. Therefore, the individual ID data string ID of the first SSID data SI1 included in the first data frame includes the individual IDs of the small terminals 20 that broadcast the data frame. The ID is included.

Further, the peripheral terminal 30 acquires the second data frame which is the second data frame of the first group, and subsequently, the second SSID data SI2 and the second SSID data SI2 included in the second data frame are included in the second data frame. The information of the received electric field level RL2 and the second MAC address MA2 of the data frame is extracted from the second data frame and added after the first small terminal information. The individual ID data string ID of the second SSID data SI2 included in the second data frame includes the individual IDs of the small terminals 20 that broadcast the data frame. The ID is included. At this time, the received electric field level RL2 and the second MAC address MA2 of the second data frame are the same as the received electric field level RL1 and the first MAC address MA1 of the first data frame.

Further, the third SSID data SI3 included in the data frame broadcast by the plurality of small terminals 20 of the second group acquired at the same time, the reception electric field level RL3 of the third data frame, and the third MAC address MA3. Information is extracted from the third data frame and given after the second MAC address MA2 above. The predetermined time width on which the peripheral terminal 30 considers that each of the first, second, and third data frames has been acquired at the same time can be arbitrarily set. For example, it may be a fixed time width such as 10 seconds after receiving the first data frame, or it may be a time interval during which the peripheral terminal 30 confirms the reception status of the data frame.

After generating the information of all the small terminals 20 acquired by the peripheral terminals 30, EOF (End Of File) data indicating the data end is added to the end to generate the terminal position related information PD.

FIG. 8 is a position-related information transmission flow RT2 in which the peripheral terminal 30 according to the embodiment of the present application transmits the terminal position-related information PD. The position-related information transmission flow RT2 is repeatedly executed while the peripheral terminal 30 is running or the application software that enables the position identification system 10 is installed. Further, the repetition of the position-related information transmission flow RT2 may be repeatedly executed at any time as described above. Further, the repetition interval may be set by the owner of the surrounding terminal 30, fixed every 5 minutes, or automatically set by the terminal type such as a PC, smartphone, or tablet terminal. good.

First, the data frame acquisition unit 31 is in a standby state so that the data frame can be received from the small terminal 20 (step S201).

Next, the data frame acquisition unit 31 determines whether or not the data frame has been received from the small terminal 20 (step S202).

If it is not determined in step S202 that the data frame has been received from the small terminal 20 (step S202: No), the data frame acquisition unit 31 returns to the process of step S201, and steps S201 and S202 are repeatedly executed.

Further, in step S202, when it is determined that the data frame has been received from the small terminal 20 (step S202: Yes), the data frame acquisition unit 31 acquires the received data frame and the data frame when the data frame is received. The time AT and the received electric field level RL are supplied to the position-related information generation unit 33 (step S203).

Next, the position-related information generation unit 33 receives the supplied acquisition time AT, the acquisition position AP set in itself or automatically acquired from the GPS mobile phone, its own terminal type TT, and the small terminal extracted from the received data frame. A terminal position-related information PD having information on the SSID of 20 and the MAC address of the small terminal 20 is generated (step S204).

Next, the position-related information generation unit 33 determines whether the information of all the small terminals 20 acquired by the data frame acquisition unit 31 at the same time or within a predetermined time width is included in the terminal position-related information PD (step). S205).

In step S205, when it is not determined that the information of all the small terminals 20 is included in the terminal position-related information PD (step S205: No), the position-related information generation unit 33 re-executes the process of step S204. The information of the next small terminal 20 is added after the generated terminal position-related information PD.

When it is determined in step S205 that the information of all the small terminals 20 is included in the terminal position-related information PD (step S205: Yes), the position-related information generation unit 33 terminates the data in the terminal position-related information PD. EOF data indicating the above is added to the end, and the terminal position-related information PD is supplied to the position-related information transmission unit 35. After that, as a terminal position-related information transmission step, the position-related information transmission unit 35 transmits the supplied terminal position-related information PD to the server 40 via the network NW (step S206).

By the above processing, the peripheral terminal 30 receives the data frame transmitted by the small terminal 20, generates the terminal position-related information PD, and transmits the terminal position-related information PD to the server 40.

FIG. 9 is a diagram showing a configuration of a server 40 according to an embodiment of the present application.

The server 40 has a position-related information acquisition unit 41 that acquires the terminal position-related information PD transmitted by the peripheral terminals 30, and a position identification unit 43 that specifies the positions of each of the plurality of small terminals 20 based on the terminal position-related information PD. The information included in the terminal position-related information PD, the storage unit 45 that stores the positions of the plurality of small terminals 20 specified by the terminal position-related information PD and the plurality of small terminals 20 in chronological order, and the terminal position-related information PD are appropriate information. An information determination unit 47 that determines whether or not the terminal position, and an emergency contact unit 49 that makes an emergency contact to related organizations when the emergency flag SF of any of the plurality of small terminals 20 included in the terminal position-related information PD indicates an emergency situation. Has.

The position-related information acquisition unit 41 acquires the terminal position-related information PD transmitted by the surrounding terminals 30 via the network NW and supplies the terminal position-related information PD to the position identification unit 43, the storage unit 45, the information determination unit 47, and the emergency contact unit 49.

The position specifying unit 43 identifies the position of each of the plurality of small terminals 20 based on the terminal position related information PD supplied from the position related information acquisition unit 41. Specifically, when the terminal position-related information PD transmitted by one peripheral terminal 30 to one group of small terminals 20 is acquired, the individual ID data of the SSID of the small terminal 20 included in the terminal position-related information PD. Each owner of the plurality of small terminals 20 is identified from the column ID, and the acquisition time AT of the data frame of one peripheral terminal 30 included in the terminal position related information PD, the acquisition position AP, and the reception electric field level RL of the data frame. Based on the above, it is specified that there are a plurality of small terminals 20 at a radius distance corresponding to the reception electric field level RL of the data frame from the acquisition position AP of the data frame of the surrounding terminal 30. Further, when the terminal position-related information PDs transmitted by the plurality of peripheral terminals 30 are acquired for the small terminals 20 of one group within a predetermined time width, the plurality of peripheral terminals included in the plurality of terminal position-related information PDs. Data frame acquisition time AT, acquisition position AP, and data frame reception electric field level RL from each of the data frame acquisition position APs of the plurality of peripheral terminals 30 to each of the reception electric field levels RL of the plurality of data frames. Generates position identification information that identifies that there are a plurality of small terminals 20 at points where the corresponding radius distance ranges overlap. The position identification unit 43 supplies the position identification information to the storage unit 45 for each individual ID of the small terminals 20 in one group.

The storage unit 45 stores the position identification information for each individual ID of the terminal position-related information PD supplied from the position-related information acquisition unit 41 and the small terminals 20 of one group specified by the position identification unit in chronological order.

The information determination unit 47 determines whether the information included in the terminal position-related information PD is appropriate information. Specifically, the information determination unit 47 has a position identification system 10 stored in advance in the storage unit 45 for the individual ID and MAC address of the small terminal 20 that broadcasts the data frame included in the terminal position-related information PD. The individual ID of the small terminal 20 registered for use is compared with the registration information associated with the MAC address. Specifically, the individual ID of the first five characters of the individual ID data string ID of the SSID included in the terminal position-related information PD, the MAC address, and the registration information recorded in the storage unit 45 are compared.

The information determination unit 47 has a discrepancy between the individual ID and MAC address of the small terminal 20 that broadcasts the data frame included in the terminal position-related information PD and the registered individual ID and registered MAC address of the registration information, especially when there is a discrepancy between the terminal position. Related information When it is detected that the information contained in the PD has a MAC address different from the registered MAC address for the registered individual ID, a small terminal that broadcasts a data frame containing a MAC address different from the registered information. 20 is determined as a spoofing terminal. The information determination unit 47 registers the spoofing terminal as a blacklist in the storage unit 45, and deletes the terminal position-related information PD of the spoofing terminal and the position identification information specified by the position identification unit 43 from the storage unit 45. Further, the information determination unit 47 causes the position identification unit 43 to ignore the identification of the position of the spoofing terminal when the MAC address of the spoofing terminal is included in the terminal position-related information PD to be acquired thereafter. May be instructed to.

Further, the server 40 has an information determination unit 47 that acquires registration information including a registered individual ID and a registered MAC address recorded in advance, and the terminal position-related information PD includes the terminal MAC address of the small terminal 20 and is a terminal. When the position-related information PD receives the terminal position-related information PD including the same individual ID as the registered individual ID, the information determination unit 47 determines in the appropriateness that the terminal MAC address included in the terminal position-related information PD is the registered MAC. If it is different from the address, it is determined that the terminal position related information PD is not appropriate information.

Further, the information determination unit 47 is a position outside the communication range for broadcasting the data frame of the small terminal 20 for the position identification information specified based on the plurality of terminal position-related information PDs acquired within a predetermined time width. When is detected, the plurality of peripheral terminals 30 that have transmitted each of the plurality of terminal position-related information PDs are urged to confirm the registered address.

The emergency contact unit 49 determines whether the small terminal 20 of one group is in an emergency situation from the data of the emergency flag SF of the small terminal 20 of one group included in the terminal position related information PD. When the information determination unit 47 determines that the small terminal 20 of one group is in an emergency situation, the school SC in which each owner of the small terminal 20 of one group is present, the nearest to the specified position. Make an emergency contact to the police station PS, the guardian terminal of each owner, and the guardian emergency contact information.

FIG. 10 is a diagram illustrating a state in which the position specifying unit 43 of the server 40 according to the embodiment of the present application specifies the position of the small terminal 20.

In this embodiment, when the position of the small terminal 20 of the first group including the seven small terminals 20 of aaaaa, bbbbbb, ccccc, ddddd, eeee, fffff and gggggg as the individual IDs shown in FIG. 7 is specified. Will be described.

The peripheral terminal 30A received the data frame broadcast by the small terminal 20 of the first group at a reception electric field level of 65%. At this time, the position specifying unit 43 of the server 40 determines that the small terminal 20 is within the range RA of the radius DA corresponding to the received electric field level of 65% from the residential NH where the surrounding terminal 30A is located.

Further, the peripheral terminal 30B received the data frame broadcast by the small terminal 20 of the first group at the reception electric field level of 85%. At this time, the position specifying unit 43 of the server 40 determines that the small terminal 20 is within the range RB of the radius DB corresponding to the received electric field level of 85% from the store NS where the peripheral terminal 30B is located.

Further, the peripheral terminal 30C received the data frame broadcast by the small terminal 20 of the first group at the reception electric field level of 40%. At this time, the position specifying unit 43 of the server 40 determines that the small terminal 20 is within the range RC of the radius DC corresponding to the received electric field level of 40% from the pedestrian P possessing the surrounding terminal 30C.

In the position specifying unit 43, the small terminals 20 of the first group and their respective owners are placed in the shaded area OP in the figure in which the respective ranges overlap from the ranges RA, RB, and RC in which the above three positions are specified. It is determined that the position is located, and the range OP is generated as the position identification information for each individual ID.

FIG. 11 is a diagram illustrating how the information determination unit 47 according to the embodiment of the present application determines whether the information included in the terminal position-related information PD is appropriate.

In this embodiment, the case where the peripheral terminals 30D and 30E installed in the residences NH1 and NH2 receive the data frame broadcast by the small terminal 20 of the first group will be described. Further, at this time, the case where the peripheral terminals 30D and 30E are desktop PCs and the owner himself sets the acquisition position AP will be described.

First, a case where the address set by the peripheral terminal 30E installed in the residence NH2 is erroneously input to the position of the peripheral terminal 30E1 which is a relatively short distance such as a different address will be described.

The small terminals 20 of the first group broadcast the data frame, the surrounding terminals 30D and 30E receive it, and each transmits the terminal position related information PD to the server 40 via the network NW. The terminal position-related information PD transmitted by the peripheral terminal 30D includes an acquisition position APD indicating a correct address. However, the terminal position-related information PD transmitted by the peripheral terminal 30E includes the acquisition position APE1 indicating the peripheral terminal 30E1 which is an incorrect address.

The information determination unit 47 determines that the peripheral terminals are at the positions of 30D and 30E1, respectively, from the reception positions included in the terminal position-related information PD transmitted from each of the peripheral terminals 30D and 30E. The information determination unit 47 calculates the distance between the two points of the surrounding terminals 30D and 30E1, and if the distance is equal to or less than a predetermined distance, for example, the diameter distance of the communication range broadcast by the small terminal 20, the first group. It is determined that there is no significant change in the position of the small terminal 20 of the above, and each of the terminal position-related information PDs including the acquisition position APD and APE1 and the position identification information generated based on the terminal position-related information PD are stored as they are in the storage unit 45. To record.

Next, a case where the address set by the peripheral terminal 30E installed in the residence NH2 is erroneously input to the position of the peripheral terminal 30E2 which is a long distance far away will be described.

The information determination unit 47 determines that the peripheral terminals are at the positions of 30D and 30E2, respectively, from the reception positions included in the terminal position-related information PD transmitted from each of the peripheral terminals 30D and 30E. The information determination unit 47 calculates the distance between the two points of the peripheral terminals 30D and 30E2, and if the distance is equal to or greater than a predetermined distance, for example, the diameter distance of the communication range broadcast by the small terminal 20, the peripheral terminals 30D and It is determined that there is an error in either the acquisition position APD or APE2 of 30E. In this case, the information determination unit 47 contacts the peripheral terminals 30D and 30E to confirm whether the registered address is appropriate.

The predetermined distance for determining that the address registered in the surrounding terminal 30 is incorrect can be arbitrarily set. In this embodiment, the diameter distance of the communication range broadcast by the small terminal 20 is used as the determination threshold value, but the position of the small terminal 20 predicted from the received electric field level of the data frame acquired from the plurality of surrounding terminals 30 overlaps. It may be determined by detecting the presence or absence.

FIG. 12 is a diagram illustrating how the information determination unit 47 according to the embodiment of the present application determines whether the information included in the terminal position-related information PD transmitted from the plurality of terminal types is appropriate.

Similar to FIG. 11, the data frames broadcast by the small terminals 20 of the first group are received by the peripheral terminals 30D and 30E installed in the residences NH1 and NH2, and the address set by the peripheral terminals 30E is large. A case where the input is erroneously input to the position of the peripheral terminal 30E2, which is a long distance away, will be described. In addition, when the pedestrian P possesses a peripheral terminal 30F, which is a smartphone having a GPS function, and the peripheral terminal 30F transmits terminal position-related information PD including the acquired position APF automatically acquired from the GPS function. Will be described.

The server 40 acquires the terminal position-related information PD of 3 including the acquisition position APD indicating the correct address, the acquisition position APE2 indicating the incorrect address, and the acquisition position APF automatically acquired by the GPS function via the network NW.

Similar to the description of FIG. 9, the information determination unit 47 determines that there is an error in any of the acquisition positions APD, APE2, or APF of the peripheral terminals 30D, 30E2, or 30F.

At this time, the information determination unit 47 determines that there is an error in the acquisition position APE2, which is the only acquisition position APD, APE2, or APF of the peripheral terminals 30D, 30E2, and 30F, and is located at a long distance from the peripheral terminals 30D, 30E2, and 30F. We will contact 30E to confirm that the registered address is correct.

Further, the information determination unit 47 refers to the terminal type TT included in each of the terminal position-related information PDs transmitted by the peripheral terminals 30D, 30E2, or 30F, and the peripheral terminals that automatically acquire the position information in conjunction with the GPS function. It may be determined that the information of the acquisition position APF on the 30th floor has the highest reliability, and a contact is made to prompt the surrounding terminals 30D and 30E to confirm whether the registered address is appropriate.

Further, the information determination unit 47 determines that the information of the acquisition position APF of the peripheral terminal 30F that automatically acquired the position information in conjunction with the GPS function has the highest reliability, and the peripheral terminal 30D having no GPS function and the peripheral terminal 30D The terminal position related information PD of 30E may be excluded.

FIG. 13 is a position identification information generation flow RT3 in which the server 40 according to the embodiment of the present application generates and stores the position identification information. The position identification information generation flow RT3 is repeatedly executed while the server 40 is running.

First, the position-related information acquisition unit 41 enters a standby state in which the terminal position-related information PD can be received from the surrounding terminals 30 (step S301).

Next, the position-related information acquisition unit 41 determines whether or not the terminal position-related information PD has been received from the surrounding terminals 30 (step S302).

If it is not determined in step S302 that the terminal position-related information PD has been received from the surrounding terminals 30 (step S302: No), the position-related information acquisition unit 41 returns to the process of step S301, and steps S301 and S302 are repeatedly executed. Will be done.

Further, in step S302, when it is determined that the terminal position-related information PD has been received from the surrounding terminals 30 (step S302: Yes), the position-related information acquisition unit 41 uses the received terminal position-related information PD as the position identification unit 43. , A storage unit 45, an information determination unit 47, and an emergency contact unit 49. Further, the position specifying unit 43 identifies each owner of the plurality of small terminals 20 from the individual ID data string ID included in the supplied terminal position related information PD, and the peripheral terminals included in the terminal position related information PD. Based on the acquisition time AT of 30 data frames, the acquisition position AP, and the received electric field level RL of the data frame, the position of the small terminal 20 that broadcasts the data frame is specified for each individual ID of the plurality of small terminals 20. To generate position identification information (step S303).

Next, the information determination unit 47 extracts the individual ID data and the MAC address of the small terminal 20 that broadcasts the data frame included in the terminal position-related information PD, and converts the registered data recorded in the storage unit 45 into the individual ID. The corresponding MAC address is read out, and it is determined whether or not the correspondence between the individual ID data of the small terminal 20 that broadcasts the data frame included in the terminal position-related information PD and the MAC address matches the registered data (step S304).

In step S304, when it is not determined that the correspondence between the individual ID data of the small terminal 20 that broadcasts the data frame included in the terminal position related information PD and the MAC address matches the registered data (step S204: No), the information determination The unit 47 determines that the small terminal 20 with the MAC address included in the terminal position-related information PD is a spoofed terminal, and deletes the terminal position-related information PD of the MAC address and the position identification information generated in step S303 from the storage unit 45. (Step S305).

Next, the information determination unit 47 records the MAC address as a blacklist in the storage unit 45 (step S306). Further, the information determination unit 47 causes the position identification unit 43 to ignore the identification of the position of the spoofing terminal when the MAC address of the spoofing terminal is included in the terminal position-related information PD to be acquired thereafter. May be instructed to.

Further, in step S304, when it is determined that the correspondence between the individual ID data of the small terminal 20 that broadcasts the data frame included in the terminal position-related information PD and the MAC address matches the registered data (step S304: Yes). The information determination unit 47 transmits each of the plurality of terminal position-related information PDs to the position-specific information specified based on the plurality of terminal position-related information PDs acquired within a predetermined time width. It is determined whether the acquisition position AP of the peripheral terminal 30 is correct (step S307).

In step S307, when it is determined that the acquisition position APs of the plurality of peripheral terminals 30 that have transmitted each of the plurality of terminal position-related information PDs are correct (step S307: Yes), the information determination unit 47 determines the received terminal position-related information. The information PD and the position identification information for each individual ID of the plurality of small terminals 20 generated in step S303 are recorded in the storage unit 45 (step S308).

Further, in step S307, when it is not determined that the acquisition position APs of the plurality of peripheral terminals 30 that have transmitted each of the plurality of terminal position-related information PDs are correct (step S307: No), the information determination unit 47 determines the plurality of terminal positions. It is determined whether the related information PD includes the information of the acquisition position AP acquired by the GPS function (step S309).

In step S309, when it is not determined that the information of the acquisition position AP acquired by the GPS function is included in the plurality of terminal position-related information PDs (step S309: No), the information determination unit 47 receives the plurality of terminals. The position-related information PD and the position-specific information generated in step S303 are discarded (step S310).

Next, the information determination unit 47 corrects each peripheral terminal 30 that has transmitted the plurality of terminal position-related information PDs when the information of the acquisition position AP set in each of the peripheral terminals 30 is incorrect. Make a request to do so (step S311).

Further, in step S309, when it is determined that the information of the acquisition position AP acquired by the GPS function is included in the plurality of terminal position-related information PDs (step S309: Yes), the information determination unit 47 has the GPS function. It is determined that the information of the acquisition position AP acquired by the above is the most reliable, and the information other than the terminal position-related information PD acquired by the GPS function and the position identification information generated in step S303 is discarded (step S312). ..

Next, the information determination unit 47 sets the acquisition position AP set in each of the peripheral terminals 30 with respect to the peripheral terminals that do not have the GPS function among the peripheral terminals 30 that have transmitted the plurality of terminal position-related information PDs. If the information in is incorrect, a contact is made requesting correction (step S313).

Next, the information determination unit 47 records in the storage unit 45 the position identification information for each individual ID of the terminal position-related information PD that was not discarded in step S312 and the plurality of small terminals 20 generated in step S303 (step S308). ).

By the above processing, the server 40 can select only appropriate information from the terminal position-related information PD received from the surrounding terminals 30 and generate and store only accurate position identification information.

According to this embodiment, terminal information is shared among the small terminals 20 in which a plurality of small terminals are assembled by the first communication method, and one of the plurality of small terminals 20 is represented by the second communication method. By broadcasting the data frame, it is possible to appropriately transmit the information to the peripheral terminal 30 without the radio waves of the second communication method interfering with each other.

In this embodiment, the case where the small terminal 20 shares the terminal information among the plurality of small terminals 20 by BLE as the first communication method has been described, but the communication method in which the plurality of small terminals 20 share the terminal information. Is not limited to this. The first communication method may be any mode of D2D (Device To Device) communication for transmitting and receiving information between small terminals.

Further, in the present embodiment, the case where the small terminal 20 broadcasts a data frame conforming to the IEEE802.11 communication standard as the second communication method has been described, but the communication standard broadcast by the small terminal 20 is not limited to this. .. A communication standard in which a data frame containing information including a service ID indicating that a location identification system is used, an individual ID indicating the owner of a small terminal, and an emergency flag indicating an emergency situation can be received by surrounding terminals. Just do it.

Further, in this embodiment, a case where the position of the small terminal 20 of one group is specified has been described. However, the position specifying unit 43 of the server 40 may further specify the position of each of the small terminals 20 in the group of 1. Specifically, for example, the small terminal 20 that adds information on the received electric field level of BLE to the data frame broadcast by the small terminal 20, and the position specifying unit 43 broadcasts the data frame based on the received electric field level of the BLE. The position may be further specified from.

Further, in this embodiment, the case where the peripheral terminal 30 and the server 40 are connected to the Internet connection network has been described as an example, but when the local location identification service is provided, the peripheral terminal 30 and the server 40 have been described. May be connected only to a closed network such as WAN or LAN.

Further, in this embodiment, the embodiment by the small terminal 20 having the above-mentioned function has been described, but the embodiment is not limited to this. For example, the embodiment may be a mobile terminal such as a smartphone in which a program or application for executing the function is installed.

As a modification of this embodiment, for example, the small terminal 20 may not only broadcast a data frame conforming to the IEEE802.11 communication standard, but may also have a function of receiving wireless communication conforming to the communication standard.

This makes it possible to receive data such as updates of the communication software of the small terminal 20. Further, it is possible to receive the update data of the registered individual ID associated with the MAC address of the small terminal 20 from the server 40 via the network NW, and update the SSID generated by the small terminal 20.

Specifically, the server 40 periodically updates the individual ID associated with the MAC address of the small terminal 20 included in the registration information. An update flag indicating that the registration individual ID has been updated is transmitted to, for example, the guardian terminal 50 of the home HM registered in the registration information.

When the small terminal 20 returns to the home HM and confirms that the guardian terminal 50 has received the data frame of the small terminal 20, the guardian terminal 50 transmits an update flag to the small terminal 20.

The small terminal 20 connects to the server 40 triggered by receiving the update flag from the guardian terminal 50, updates its own individual ID information by downloading the updated registered individual ID, and generates the SSID. Update.

As a result, the individual IDs registered in the small terminal 20 and the server 40 are periodically updated, so that the identification of the individual of the holder H can be more reliably avoided.

Further, as another aspect of updating the individual ID, the small terminal 20 is connected to the server 40 by a trigger such as that the small terminal 20 is connected to the wireless communication relay device of the home HM or is connected to the network NW by wire communication. An update request requesting the update of the individual ID may be sent to the user.

10 Positioning system 20 Small terminal 21 Inter-terminal communication transmitter 21
23 Inter-terminal communication acquisition unit 24 Data sharing unit 25 Data frame generation unit 27 Data frame transmission unit 29 Emergency recognition unit 30 Surrounding terminals 31 Data frame acquisition unit 33 Position-related information generation unit 35 Position-related information transmission unit 40 Server 41 Location-related information Acquisition unit 43 Position identification unit 45 Storage unit 47 Information judgment unit 49 Emergency contact unit 50 Parent terminal

Claims (12)

A first information transmission unit that transmits information including its own individual ID that identifies its own holder and its own operating status to another terminal by the first wireless communication method, and
An information receiving unit that receives another individual ID that identifies the holder of the other terminal from the other terminal and the operating state of the other terminal by the first wireless communication method.
A second transmission that broadcasts a data frame containing the own individual ID and data indicating that the user is an access point for wireless communication by a second wireless communication method that consumes more power than the first wireless communication method. Department and
Including
The second transmitting unit adds the other individual ID to the data frame in the second wireless communication method and broadcasts based on the operating state of itself and the operating state of the other terminal. Characteristic information transmission terminal. The information transmission terminal according to claim 1, wherein the operating state is the remaining battery level of the information transmission terminal. The information transmission terminal according to claim 1 or 2, wherein the communicable range of the first wireless communication system is narrower than the communicable range of the second wireless communication system. Claim 1 is characterized in that the data frame has a data portion indicating an identifier as an access point of the information transmitting terminal, and the data portion includes the self-individual ID and the other individual ID. The information transmission terminal according to any one of 3 to 3. The data frame is characterized in that the data portion includes information on an emergency flag indicating whether or not either the holder of the user or the holder of the other terminal is in an emergency. The information transmission terminal according to any one of claims 1 to 4. The information transmission terminal according to any one of claims 1 to 5, wherein the data portion is an SSID. The information transmission terminal according to any one of claims 1 to 6, wherein the data portion is a Bluetooth (registered trademark) device name. The information transmission terminal according to any one of claims 1 to 7, wherein the data frame includes the MAC address of the information transmission terminal to be broadcast. A first information transmission unit that transmits information including its own individual ID that identifies its own holder and its own operating status to another terminal by the first wireless communication method, and
An information receiving unit that receives the other individual ID that identifies the holder of the other terminal from the other terminal and the operating state of the other terminal by the first wireless method.
A second transmission that broadcasts a data frame containing the own individual ID and data indicating that the user is an access point for wireless communication by a second wireless communication method that consumes more power than the first wireless communication method. Department and
Including
The second transmitting unit starts or stops broadcasting a data frame in the second wireless communication method based on its own operating state and the operating state of the other terminal. Sending terminal. An information transmission method in which an information transmitting terminal transmits information including its own individual ID that identifies its own holder and another individual ID that identifies the holder of another terminal.
A first transmission step of transmitting information including the own individual ID for identifying the owner of the other terminal and the operating state of the own to the other terminal by the first wireless communication method.
A reception step of receiving the other individual ID for identifying the holder of the other terminal from the other terminal and the operating state of the other terminal by the first wireless communication method, and
A second transmission that broadcasts a data frame containing the own individual ID and data indicating that the user is an access point for wireless communication by a second wireless communication method that consumes more power than the first wireless communication method. Steps and
Including
The second transmission step adds the other individual ID to the data frame in the second wireless communication method and broadcasts based on the operating state of the own and the operating state of the other terminal. Characteristic information transmission method. An information transmission program executed by a computer, to the computer.
A first transmission step of transmitting information including the own individual ID for identifying the owner of the other terminal and the operating state of the own to the other terminal by the first wireless communication method.
A reception step of receiving the other individual ID for identifying the holder of the other terminal from the other terminal and the operating state of the other terminal by the first wireless communication method, and
A second transmission that broadcasts a data frame containing the own individual ID and data indicating that the user is an access point for wireless communication by a second wireless communication method that consumes more power than the first wireless communication method. Steps and
To run,
The second transmission step adds the other individual ID to the data frame in the second wireless communication method and broadcasts based on the operating state of the own and the operating state of the other terminal. Characteristic information transmission method. A computer-readable recording medium comprising storing the positioning program according to claim 11.

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