JP2024036633A - Information transmission terminal and information transmission method - Google Patents

Abstract

[Problem] To provide an information transmitting terminal that transmits information appropriately even when multiple information transmitting terminals are gathered in a location identification system. [Solution] The information transmitting terminal of the present invention includes a first information transmitting unit that transmits information including its own individual ID that identifies its holder and its own operating status to other terminals using a first wireless communication method, an information receiving unit that receives from the other terminals the other individual ID that identifies the holder of the other terminal and the operating status of the other terminal using the first wireless communication method, and a second transmitting unit that broadcasts a data frame including the own individual ID and data indicating that the information transmitting terminal is a wireless communication access point using a second wireless communication method different from the first wireless communication method, and the second transmitting unit is characterized in that it adds the other individual ID to the data frame in the second wireless communication method and broadcasts it based on its own operating status and the operating status of the other terminal. [Selected Figure] Figure 1

Description

The present invention relates to an information transmitting terminal that transmits information about a holder and an information transmitting method thereof.

In recent years, in order to protect children and the elderly, for example, children and the elderly have been given small terminals to identify their whereabouts by transmitting their GPS (Global Positioning System) location etc. via mobile phone network communication. The service is becoming popular.

Furthermore, for example, Patent Document 1 discloses that BLE (Bluetooth (registered trademark) Low Energy) or Wi-Fi (Wireless Fidelity: IEEE802.11 A mobile terminal is disclosed that receives a beacon transmitted from an access point (standard communication). A system is disclosed that manages location information of a mobile terminal that does not have a GPS function, which consumes a large amount of power, by transmitting a Wi-Fi unique number or a BLE unique number received by the mobile terminal to a server via an LPWA relay device. ing.

JP 2018-129598 Publication

In a system using mobile terminals that receive beacons such as Wi-Fi, such as the system in Patent Document 1, for example, when a plurality of mobile terminals are gathered together, each of the plurality of mobile terminals has the same When transmitting communication radio waves conforming to communication standards, the communication radio waves may interfere with each other. As a result, the communication radio waves may not reach the relay device appropriately, 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 transmitting terminal and an information transmitting method that appropriately transmit information even when a plurality of information transmitting terminals are assembled in a location specifying system. With the goal.

The invention according to claim 1 includes: a first information transmitting unit that transmits information including its own individual ID for identifying its own holder and its operating state to another terminal using a first wireless communication method; an information receiving unit that receives from another terminal an individual ID that identifies a holder of the other terminal and an operating state of the other terminal using the first wireless method; a second transmitter that broadcasts a data frame including data indicating that the access point is an access point using a second wireless communication method different from the first wireless communication method; The device is characterized in that it adds the other individual ID to the data frame in the second wireless system and broadcasts the data frame based on its own operating state and the operating state of the other terminal.

The invention according to claim 9 includes: a first information transmitting unit that transmits information including its own individual ID for identifying its own holder and its operating state to another terminal using a first wireless communication method; an information receiving unit that receives from another terminal an individual ID that identifies a holder of the other terminal and an operating state of the other terminal using the first wireless method; a second transmitting unit that broadcasts a data frame including data indicating that the access point is an access point using a second wireless communication method that consumes more power than the first wireless communication method; The terminal starts or stops broadcasting the data frame in the second wireless system based on the operating state of the terminal itself and the operating state of the other terminal.

The invention according to claim 10 is an information transmitting method in which an information transmitting terminal transmits information including its own individual ID that identifies its own holder and other individual IDs that identify the holder of another terminal, a first transmitting step of transmitting information including the own individual ID for identifying the holder of the own terminal and the operating state of the own terminal to another terminal using a first wireless communication method; and from the other terminal to the other terminal; a receiving step of receiving the other individual ID identifying the holder of the other terminal and the operating state of the other terminal using the first wireless method; and the own individual ID and data indicating that the other terminal is an access point for wireless communication. a second transmitting step of broadcasting a data frame containing the data frame using a second wireless communication method that consumes more power than the first wireless communication method; The present invention is characterized in that the other individual ID is added to the data frame in the second wireless system and broadcast based on the operation status of the other terminal.

The invention according to claim 11 is an information transmission program executed by a computer, wherein the computer transmits information including the own individual ID for specifying the own holder and the own operating state to the other terminal. a first transmitting step of transmitting a holder of the other terminal using a first wireless communication method; a receiving step of receiving data using a communication method, and transmitting a data frame including the self-individual ID and data indicating that the self is an access point for wireless communication to a second wireless communication method that consumes more power than the first wireless communication method; a second transmitting step of broadcasting using the communication method, and the second transmitting step is based on the operating state of the own terminal and the operating state of the other terminal, using the second wireless communication method. It is characterized in that the above-mentioned other individual ID is added to the above-mentioned data frame and then broadcast.

1 is a diagram showing the configuration of a position specifying system 10 according to an embodiment of the present application. 1 is a diagram showing the configuration of a small terminal 20 according to an embodiment of the present application. FIG. 3 is a diagram showing an example of shared data SD of the small terminal 20 recorded in the data sharing section 24 of the small terminal 20 according to the embodiment of the present application. FIG. 3 is a diagram showing an example of SSIDs included in a data frame generated by the small terminal 20 according to the embodiment of the present application. This is an information transmission flow RT1 in which the small terminal 20 broadcasts a data frame according to the embodiment of the present application. It is a diagram showing the configuration of a peripheral terminal 30 according to an embodiment of the present application. FIG. 3 is a diagram showing an example of terminal location related information PD generated by surrounding terminals 30 according to an embodiment of the present application. This is a location-related information transmission flow RT2 in which the surrounding terminal 30 transmits terminal location-related information PD according to the embodiment of the present application. It is a diagram showing the configuration of a server 40 according to an embodiment of the present application. FIG. 3 is a diagram illustrating how the position specifying unit 43 of the server 40 specifies the position of the small terminal 20 according to the embodiment of the present application. FIG. 4 is a diagram illustrating how the information determining unit 47 according to the embodiment of the present application determines whether the information included in the terminal location related information PD is appropriate. FIG. 4 is a diagram illustrating how the information determining unit 47 according to the embodiment of the present application determines whether information included in terminal location related information PD transmitted from a plurality of terminal types is appropriate. This is a position specifying information generation flow RT3 in which the server 40 generates and stores position specifying information according to the embodiment of the present application.

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

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

The position identification system 10 receives, for example, a plurality of small terminals 20A to 20D owned by each of a plurality of locally gathered holders H1 to H4, and terminal information of the plurality of small terminals 20A to 20D, and determines the location. A surrounding terminal 30 that transmits information, a server 40 that identifies the location of the small terminal 20 based on the information regarding the location transmitted from the surrounding terminal 30, and a parent terminal that acquires the location of the small terminal 20 identified by the server 40. 50. The surrounding terminal 30 and the parent terminal 50 are configured to be able to communicate with the server 40 via the network NW.

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

As the first wireless communication method, the small terminal 20 has, for example, a BLE function. The small terminal 20 sends information on individual IDs that identify each of the holders H1 to H4 and information on the operating status of each holder in an advertising packet (hereinafter referred to as BLE data) between the plurality of small terminals 20A to 20D. The information is shared by sending and receiving information in the following manner.

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

The information shared by the small terminals 20A to 20D using BLE includes, for example, individual ID data that identifies the owners H1 to H4 of each of the small terminals 20A to 20D, and an emergency flag indicating the operating status of the small terminals 20A to 20D. , information such as the remaining battery level of each small terminal and whether broadcast communication is being performed is shared as shared information.

Further, the small terminal 20 determines whether one small terminal among the plurality of small terminals 20A to 20D is a shared possession based on the information on the operating status of each of the plurality of small terminals 20A to 20D shared by BLE. A data frame including individual IDs that identify the persons H1 to H4 is generated, and the data frame is broadcast to the surrounding area. This makes it possible to prevent carrier waves from interfering with each other due to multiple broadcast communications.

In FIG. 1, an example will be described in which the small terminal 20A among the plurality of small terminals 20A to 20D broadcasts a data frame to the surrounding area.

In addition, in this embodiment, the first communication method for communicating between the small terminals 20 is BLE, and the second communication method for broadcasting data frames is described as wireless communication compliant with IEEE802.11 standard communication. do. However, each communication method of the first and second communication methods is not limited to this. Specifically, for example, each of the first and second communication methods includes wireless communication based on the IEEE802.11 communication standard, BLE based on the Bluetooth (registered trademark) 4.0 standard, or LoRaWAN (Long Range Wide Area Network) or LPWA such as Sigfox may be used. The first communication method is a communication method that has a narrower communication range and consumes less power than the second communication method, and may be a form of D2D (Device To Device) communication in which information is transmitted and received between small terminals. Further, even if the second communication method consumes more power in communication than the first communication method, it is sufficient that the second communication method can broadcast data frames over a wider range than 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.

In addition, the data frame compliant with the IEEE 802.11 communication standard broadcast by the small terminal 20 includes a service ID for using the location identification system 10, an individual ID for identifying the holders H1 to H4 including the holder H1, and the holder H1. -H4 includes information such as an SSID (Service Set IDentifier) including an emergency flag indicating that an emergency is occurring, and a MAC address (Media Access Control address) of the small terminal 20A that is broadcasting.

The surrounding terminal 30 as an information transmitting/receiving device is, for example, a terminal device such as a PC, a smartphone, or a tablet terminal owned by a residence NH, a store NS, or a pedestrian P in the vicinity of the small terminal 20A. The peripheral terminal 30 is equipped with a wireless LAN (Local Area Network) function that complies with the IEEE 802.11 communication standard and is configured to be able to recognize access points of the communication standard and to be able to connect to the Internet. There is.

Note that although the individual ID is not directly linked to identifying an individual, it is preferable that only a specific surrounding terminal 30 can acquire or recognize the data frame broadcast by the small terminal 20A for safety reasons. For example, it is preferable that the system is such that only the surrounding terminals 30 in which application software that enables the use of the location system 10 is installed can recognize the data frame broadcast by the small terminal 20A.

When the surrounding terminal 30 acquires a 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 peripheral terminal 30 records the date and time when the data frame was acquired, the location, and the received electric field of the data frame. Generate terminal location related information with level information added. Furthermore, the surrounding terminals 30 transmit the terminal position related information via the network NW.

The network NW is, for example, an Internet connection network to which the peripheral terminals 30 are connected via communication lines such as private lines and public communication networks, including wired lines and wireless lines. 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. etc. Note that the means by which the peripheral terminal 30 connects to the network NW is not limited to the above-mentioned method as long as the peripheral terminal 30 is connected to the Internet connection network.

The server 40, which is a server device, receives the terminal location related information transmitted by the surrounding terminals 30 via the network NW, identifies the locations of the plurality of small terminals 20A to 20D based on the terminal location related information, and calculates the locations in chronological order. It is a data server that sequentially stores the positions of each of the plurality of small terminals 20A to 20D.

The server 40 is capable of receiving terminal location related information transmitted by the surrounding terminals 30 via the network NW using a communication protocol such as TCP/IP. Furthermore, the positions of the plurality of small terminals 20A to 20D are determined based on the reception time, reception position, and reception electric field level when each of the surrounding terminals 30 received the data frame from the small terminal 20A, which are included in the received terminal position related information. Identify. Furthermore, the positions of each of the identified plurality of small terminals 20A to 20D are saved in chronological order. Furthermore, if the emergency flag included in the SSID of the small terminal 20A included in the terminal location related information indicates an emergency situation, the server 40 may, for example, Urgent communication will be made to the school SC in each location or related organizations such as the police station PS near the specified location.

The guardian terminal 50 as an acquisition terminal is, for example, a terminal installed in the home HM and owned by a family member of one of the owners H1 to H4 of each 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. Note that the parent terminal 50 is not limited to a terminal type such as a PC, a smartphone, or a tablet terminal, and may be any type as long as it is connectable to the network NW, which is an Internet connection network, and can access the server 40.

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

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

The terminal-to-terminal communication transmitting unit 21 as a first information transmitting unit includes the own individual ID that identifies the owner of the own small-sized terminal 20, the remaining battery level as the operating state of the own small-sized terminal 20, and the own small-sized terminal 20. BLE data including information on whether the terminal 20 is broadcasting is generated and the BLE data is transmitted to other small terminals 20. Note that the time interval for transmitting BLE data can be set arbitrarily. For example, the terminal-to-terminal communication transmitter 21 transmits BLE data continuously, intermittently, or intermittently. Specifically, for example, the transmission of BLE data may be performed at any time, or may be transmitted at fixed intervals such as every 5 minutes. Further, the terminal-to-terminal communication transmitting 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 other small terminals 20 within the BLE communication range, and identifies the owner of the other small terminal 20 included in the BLE data. In addition, the individual ID, the remaining battery level as the operating state of the other small terminal 20, and information as to 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. Note that the BLE data acquisition interval of the terminal-to-terminal communication acquisition unit 23 can be set arbitrarily. For example, the terminal-to-terminal communication acquisition unit 23 acquires BLE data continuously, intermittently, or intermittently. Specifically, for example, BLE data may be acquired at any time, or at fixed intervals, such as every 5 minutes. Further, the inter-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 collects terminal information of its own small terminal 20 such as its own individual ID, remaining battery level, and information on whether it is broadcasting, and other information contained in the BLE data acquired by the terminal-to-terminal communication acquisition unit 23. The individual ID of the small terminal 20 of the small terminal 20, the remaining battery level, and information as to whether the other small terminal 20 is broadcasting are recorded.

If the data frame generating unit 25 determines that the remaining battery level of its own small terminal 20 is the highest among the remaining battery levels of itself and other small terminals 20 recorded in the data sharing unit 24, the data frame generating unit 25 generates a data frame to be broadcast. generate. Specifically, the service ID that indicates the use of the location identification system 10, the own individual ID, the other individual ID, and the holder of the user or the other small terminal 20 acquired through BLE indicates that the situation is an emergency. An SSID including an emergency flag to be notified is generated, a data frame including the SSID is generated, and the generated data frame is supplied to the data frame transmission section 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. Note that if the remaining battery levels are the same, the individual IDs may be converted into numerical values and compared, and the one with the higher numerical value may be set as the access point.

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

A data frame transmitter 27 serving as a second transmitter broadcasts the data frame generated by the data frame generator 25 to the surrounding area. Note that the time interval for broadcasting can be set arbitrarily. For example, the data frame transmission unit 27 broadcasts data frames continuously, intermittently, or intermittently. Specifically, for example, broadcasting may be performed at any time, or may be performed at fixed intervals, such as every five minutes. Further, the data frame transmission unit 27 may automatically change the broadcast time interval according to the remaining battery level of the small terminal 20.

The emergency recognition unit 29 may, for example, press a button or pull a string provided on the small terminal 20 when one of the owners of the small terminal 20 sharing information via BLE falls into an emergency situation or senses danger. The holder recognizes that an emergency situation has occurred when the holder performs a pulling or other action. When the emergency recognition unit 29 is a small terminal 20 that broadcasts a data frame upon recognition of 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 the emergency situation. Furthermore, if the small terminal 20 itself is not the one that broadcasts the data frame, the terminal generates BLE data such that the emergency flag included in the BLE data indicates an emergency situation, and transmits the BLE data.

Further, at this time, the small terminal 20 in which an emergency situation has occurred or the small terminal 20 that has acquired BLE data including an emergency flag indicating an emergency situation instructs the data frame transmitting unit 27 to continue transmitting the data frame at all times. It's okay. Further, in conjunction with the transmission of the data frame, an alarm may be sounded at a high volume via a speaker (not shown) to notify the surroundings of the danger.

In other words, the terminal-to-terminal communication transmitter 21 transmits information including its own individual ID for identifying its own holder and its own battery level to other small terminals 20 via BLE, and the communication from other small terminals 20 to other terminals. An inter-terminal communication acquisition unit 23 that receives an individual ID for identifying the holder of a small terminal 20 and the remaining battery level of another small terminal 20 using BLE, and a data frame containing the own individual ID and SSID that consumes less power than BLE. The data frame transmitter 27 broadcasts a data frame over the wireless LAN based on its own battery level and the battery level of other terminals. Add another individual ID and broadcast.

In addition, there is also an inter-terminal communication transmitting unit 21 that transmits information including the own individual ID for identifying the holder of the own terminal and the remaining battery level of the own terminal to other terminals via BLE, and a An inter-terminal communication acquisition unit 23 receives an individual ID for identifying the holder and the remaining battery level of another small terminal 20 using BLE, and a wireless communication unit 23 that receives a data frame including its own individual ID and SSID using wireless communication that consumes more power than BLE. The data frame transmitter 27 broadcasts data frames over the wireless LAN based on its own battery level and the battery level of other small terminals 20. Start or stop.

FIG. 3 is a diagram showing an example of 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 BLE data, the remaining battery level, and the status of each small terminal 20 broadcasting data frames.

The individual ID is a unique ID given to each small terminal 20. By registering the personal ID in the location identification system 10, it is linked with the personal information of the holder H, and it becomes possible to specify the holder H from the individual ID. Note that the individual ID uses 5 characters out of 81 types of characters that can be used for BLE and SSID, so 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 that are communicating BLE data. The small terminal 20 determines whether to broadcast the data frame based on the remaining battery level recorded in the shared data SD. Specifically, when it is determined that the terminal 20 has the highest remaining battery level among the remaining battery levels recorded in the shared data SD, it is determined that the terminal 20 is the small terminal 20 that broadcasts data frames.

The broadcast status indicates whether each of the small terminals 20 communicating BLE data is broadcasting a data frame. When none of the small terminals 20 is broadcasting a data frame or when a plurality of small terminals 20 are broadcasting data frames, it is determined whether the small terminal itself will broadcast the data frame based on the remaining battery level.

FIG. 4 is a diagram showing an example of the data structure of an SSID included in a 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 the small terminal 20 that broadcasts the data frame.

For example, when the data frame is generated as a beacon frame compliant with the IEEE802.11 communication standard, the data frame is configured to include the 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 is, for example, a service ID header HE that indicates that the location identification system 10 is used, and specifies the owner of each of the small terminals 20 that are communicating BLE data. It consists of an individual ID data string ID, an emergency flag SF that indicates that one of the holders is in an emergency situation, a reserve flag RF, and an underbar E that separates each element.

In the example shown in FIG. 4, the service ID header HE has 3 characters, its 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 reserve flag RF has 20 characters.

The individual ID data string ID is generated such that individual IDs including the shared data SD are consecutively written. Specifically, first, its own individual ID data IDA is generated, and then the second individual ID data IDB and the third individual ID data IDC are generated. Note that since the maximum number of characters in 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 in the reserve flag RF. Furthermore, in this embodiment, the number of small terminals 20 that can broadcast data frames is five at most, including itself. When six or more small terminals 20 are sharing BLE data, after generating and broadcasting SSIDs including the individual IDs of itself and the second to fifth small terminals 20 in a time-sharing manner, SSIDs including the individual IDs of the small terminals 20 after the second one may be generated and broadcast.

In this example, the IEEE 802.11 communication standard is adopted as the second communication method for broadcasting data frames, and a data frame having an SSID of up to 32 characters in compliance with the communication standard will be described. The communication standards are not limited to these. For example, when adopting BLE as the second communication method for broadcasting data frames, a data frame may be generated in which the above information is included in the Bluetooth (registered trademark) device name. Furthermore, even when using a data frame of another communication standard, a data frame may be generated in which the above information is included in the device name of the small terminal 20, etc.

In other words, the data frame has an SSID indicating the identifier of the small terminal 20 as an access point, and the SSID includes its own individual ID and other individual IDs.

Further, the data frame includes information on an emergency flag indicating whether the SSID holder or the holder of another small terminal 20 is in an emergency situation.

The data frame also includes the MAC address of the small terminal 20 that broadcasts.

FIG. 5 is an information transmission flow RT1 in which the small terminal 20 broadcasts a data frame according to the embodiment of the present application. The information transmission flow RT1 is repeatedly executed while the small terminal 20 is activated. Further, the information transmission flow RT1 may be repeated as needed. Further, the repetition interval may be fixedly set to every 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 BLE data indicating whether it is broadcasting a data frame to the surroundings using BLE ( Step S101).

Next, as a receiving step, the terminal-to-terminal communication acquisition unit 23 receives BLE data from the other small terminal 20 using BLE, such as the individual ID of the other small terminal 20, the remaining battery level, and whether or not the other small terminal 20 is broadcasting a data frame. It enters a standby state in which it can receive data (step S102).

Next, the terminal-to-terminal communication acquisition unit 23 determines whether BLE data has been received from another small terminal 20 (step S103).

In step S103, if it is not determined that BLE data has been received from another 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 uses its own individual ID. A data frame containing only the above is generated (step S104). Note that this process may be determined by assuming that no BLE data has been received from another small terminal 20 for a predetermined period of time.

Next, as a second transmission step, the data frame transmitter 27 broadcasts the data frame generated by the data frame generator 25 to the surrounding area (step S105).

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

Next, the data frame generation unit 25 reads the shared data SD of the data sharing unit and determines whether its own battery level is the highest among itself and other small terminals 20 acquired using BLE data (step S107 ).

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

Further, in step S107, if it is determined that the battery level of the own battery is the highest (step S107: Yes), the data frame generation unit 25 determines that it is a small terminal that broadcasts data frames, and A data frame including the individual IDs of other small terminals 20 recorded in the shared data SD is generated (step S108).

Next, as a second transmission step, the data frame transmitter 27 broadcasts the data frame generated by the data frame generator 25 to the surrounding area (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).

If it is determined in step S110 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, if 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 Regenerate the individual ID that is not broadcast in the data frame.

By executing the above process, the small terminal 20 can share terminal information of other small terminals 20 using BLE and broadcast data frames.

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

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

The surrounding terminal 30 includes a data frame acquisition unit 31 that obtains the data frame broadcast by the small terminal 20, and extracts necessary information from the data frame and adds information on the data frame reception state of the surrounding terminal 30 to determine the terminal position. It includes a location-related information generating section 33 that generates related information, and a location-related information transmitting section 35 that transmits the terminal location-related information to the server 40 via the network NW.

The data frame acquisition unit 31 checks whether there are access points around the surrounding terminal 30. When the small terminal 20 recognizes the data frame broadcast by the small terminal 20 and indicating the access point, the small terminal 20 acquires the data frame and supplies it to the location-related information generating section 33 . Further, the reception time and reception electric field level at the time when the data frame was acquired are supplied to the position-related information generation unit 33. Note that confirmation of whether there is an access point in the vicinity of the surrounding terminal 30 can be arbitrarily set. The surrounding terminals 30 may be set to check the reception status of data frames at any time. Further, the time interval for checking may be set by the owner of the surrounding terminal 30, may be set to a fixed value such as every 5 minutes, or may be set automatically depending on the type of terminal such as a PC, smartphone, or tablet terminal. It's okay.

The location-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. Additionally, information on the reception time, received electric field level, and reception position of the surrounding terminals 30 when the data frame supplied from the data frame acquisition unit 31 was received is added to the extracted information to generate terminal position related information. and supplies it to the location-related information transmitter 35.

The location-related information transmitter 35 transmits the terminal location-related information generated by the location-related information generator 33 to the server 40 via the network NW to which it is connected.

FIG. 7 is a diagram showing an example of terminal location related information PD generated by the surrounding terminals 30 according to the embodiment of the present application.

The terminal location related information PD includes the data frame acquisition time AT, which is information about the surrounding terminal 30 that generated and transmitted the terminal location related information PD, the acquisition position AP, and TT indicating the terminal type of the surrounding terminal 30.

The acquisition position AP is the position of the surrounding terminal 30 when the data frame is received from the terminal, and is, for example, latitude and longitude information obtained by GPS or the like. Note that the location information is not limited to latitude and longitude. For example, the acquisition position AP may be the address of a residence or store where the peripheral terminal 30 is installed, or a facility name that can specify an address such as an apartment name or a store name. In addition, in the case of a PC, the acquisition location AP may be set in advance by the owner of the surrounding terminal 30, or may be automatically obtained from the IP address when connected to the Internet or from a different device connected to the surrounding terminal 30. may have been obtained. Furthermore, 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 peripheral terminal 30. Specifically, it may indicate a desktop PC, a laptop PC, a smartphone, a tablet terminal, or the like. Alternatively, it may be possible to determine whether the surrounding terminal 30 has a GPS function or whether the acquired position AP is a position obtained in conjunction with the GPS function or manually input by the owner. Alternatively, the information may simply be information on whether the terminal is a mobile terminal or a fixed terminal.

In this embodiment, the peripheral terminals 30 have a first group including seven small terminals 20 with individual IDs aaaaa, bbbbb, ccccc, ddddd, eeeee, fffff, and ggggg, and individual IDs 11111, 22222, A case will be described in which data frames of a second group including three small terminals 20, 33333 and 33333 are acquired at the same time or within a predetermined time interval. Furthermore, a case will be explained in which the small terminals 20 that broadcast data frames are the small terminals 20 that have an individual ID of aaaaa in the first group, and the small terminals 20 that have an individual ID of 11111 in the second group. do.

The terminal location 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, the received electric field level RL1 of the first data frame, and the first MAC address MA1 included in the first data frame of the small terminals 20 of the first group acquired by the surrounding terminal 30. The first small terminal information is extracted from the first data frame and added after the information on the surrounding terminals 30 described above.

Furthermore, in the first group, data frames are broadcast twice in a time-sharing manner. Therefore, the individual ID data string ID of the first SSID data SI1 included in the first data frame includes the individual ID of the small terminal 20 of the five small terminals 20 from aaaaa to eeeee that broadcast the data frame. Contains ID.

Further, the surrounding terminal 30 acquires the second data frame, which is the second data frame of the first group, and subsequently acquires the second SSID data SI2 and the second SSID data SI2 included in the second data frame. Information on the received electric field level RL2 and 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 ID of the small terminal 20 that broadcast the data frame, aaaaa, fffff, and ggggg. Contains ID. Further, 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.

Also, the third SSID data SI3, the received electric field level RL3 of the third data frame, and the third MAC address MA3 included in the data frame broadcast by the plurality of small terminals 20 of the second group acquired at the same time. Information is extracted from the third data frame and added after the second MAC address MA2. Note that the above-mentioned predetermined time period for which it is assumed that the surrounding terminal 30 has acquired each of the first, second, and third data frames at the same time can be arbitrarily set. For example, it may be a fixed time period such as 10 seconds after receiving the first data frame, or it may be a time interval during which the surrounding terminals 30 check the reception status of the data frame.

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

FIG. 8 is a location-related information transmission flow RT2 in which the surrounding terminal 30 transmits terminal location-related information PD according to the embodiment of the present application. The location-related information transmission flow RT2 is repeatedly executed while the surrounding terminal 30 is activated or while the application software that makes the location identification system 10 usable is installed. Further, the repetition of the location-related information transmission flow RT2 may be repeatedly executed as needed as described above. Further, the repetition interval may be set by the owner of the surrounding terminal 30, may be set to a fixed value such as every 5 minutes, or may be set automatically depending on the type of terminal such as a PC, smartphone, or tablet terminal. good.

First, the data frame acquisition unit 31 enters a standby state in which it can receive a data frame from the small terminal 20 (step S201).

Next, the data frame acquisition unit 31 determines whether a data frame has been received from the small terminal 20 (step S202).

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

Further, in step S202, if it is determined that a 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 acquired at the time of receiving the data frame. The time AT and the received electric field level RL are supplied to the position-related information generation section 33 (step S203).

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

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

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

In step S205, if it is determined that the information of all the small terminals 20 is included in the terminal location related information PD (step S205: Yes), the location related information generation unit 33 adds the terminal location related information PD to the terminal location related information PD. EOF data indicating EOF data is added to the terminal end, and the terminal location related information PD is supplied to the location related information transmitting section 35. Thereafter, as a terminal location related information transmitting step, the location related information transmitting unit 35 transmits the supplied terminal location related information PD to the server 40 via the network NW (step S206).

Through the above process, the surrounding terminal 30 receives the data frame transmitted by the small terminal 20, generates terminal position related information PD, and transmits the terminal position related information PD to the server 40.

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

The server 40 includes a location-related information acquisition unit 41 that obtains terminal location-related information PD transmitted by surrounding terminals 30, and a location identification unit 43 that identifies the location of each of the plurality of small terminals 20 based on the terminal location-related information PD. and a storage unit 45 that stores the terminal location related information PD and the location of each of the plurality of small terminals 20 identified by the location specifying unit 43 in chronological order, and the information included in the terminal location related information PD is appropriate information. an information determination unit 47 that determines whether the terminal location-related information PD is in place, and an emergency communication unit 49 that makes an emergency contact to related organizations when the emergency flag SF of any one of the plurality of small terminals 20 included in the terminal location related information PD indicates an emergency situation; has.

The location-related information acquisition section 41 obtains terminal location-related information PD transmitted by the surrounding terminals 30 via the network NW and supplies it to the location identification section 43 , storage section 45 , information determination section 47 , and emergency communication section 49 .

The position specifying unit 43 specifies 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 acquiring terminal location related information PD transmitted by one surrounding terminal 30 to one group of small terminals 20, individual ID data of the SSID of the small terminal 20 included in the terminal location related information PD The owner of each of the plurality of small terminals 20 is identified from the column ID, and the data frame acquisition time AT, acquisition position AP, and data frame reception electric field level RL of one surrounding terminal 30 included in the terminal location related information PD are determined. Based on this, it is specified that a plurality of small terminals 20 are present at a radial distance corresponding to the received electric field level RL of the data frame from the data frame acquisition position AP of the surrounding terminal 30. In addition, when acquiring terminal location related information PD transmitted by a plurality of surrounding terminals 30 within a predetermined time width to one group of small terminals 20, a plurality of surrounding terminals included in the plurality of terminal location related information PD Based on the data frame acquisition time AT, the acquisition position AP, and the data frame reception electric field level RL, the data frame reception electric field level RL is determined from each of the data frame acquisition positions AP of the plurality of surrounding terminals 30 to each of the plurality of data frame reception electric field levels RL. Position specifying information is generated specifying that a plurality of small terminals 20 are located at points where corresponding radial distance ranges overlap. The position specifying unit 43 supplies the position specifying information to the storage unit 45 for each individual ID of the small terminals 20 in one group.

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

The information determination unit 47 determines whether the information included in the terminal location related information PD is appropriate information. Specifically, the information determination unit 47 determines the 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 broadcast the data frame included in the terminal location related information PD. The individual ID of the small terminal 20 registered for use is compared with the registration information in which the MAC address is linked. Specifically, the individual ID of the first five characters of the individual ID data string ID of the SSID included in the terminal location related information PD, the MAC address, and the registration information recorded in the storage unit 45 are compared.

If there is a discrepancy between the individual ID and MAC address of the small terminal 20 that broadcast the data frame included in the terminal location-related information PD and the registered individual ID and registered MAC address of the registered information, the information determination unit 47 particularly determines the terminal location. A small terminal that broadcasts a data frame containing a MAC address different from the registered information when it is detected that the information included in the related information PD has a MAC address different from the registered MAC address for the registered individual ID. 20 is determined to be a spoofed terminal. The information determining unit 47 registers the spoofing terminal in the storage unit 45 as a blacklist, and deletes the terminal location related information PD of the spoofing terminal and the position specifying information specified by the position specifying unit 43 from the storage unit 45. Additionally, the information determination unit 47 instructs the location specifying unit 43 to ignore the identification of the location of the spoofed terminal if the MAC address of the spoofed terminal is included in the terminal location related information PD to be acquired thereafter. may also be commanded.

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 location related information PD includes the terminal MAC address of the small terminal 20 and the terminal When receiving terminal location-related information PD whose location-related information PD includes the same individual ID as the registered individual ID, the information determination unit 47 determines that the terminal MAC address included in the terminal location-related information PD is the registered MAC in the appropriateness determination. If it is different from the address, it is determined that the terminal location related information PD is not proper information.

The information determination unit 47 also determines the location of the small terminal 20 at a location outside the communication range where the data frame is to be broadcast, with respect to the location specifying information specified based on the plurality of terminal location related information PD acquired within a predetermined time width. If detected, the plurality of surrounding terminals 30 that have transmitted each of the plurality of terminal position related information PDs are prompted to confirm the registered address.

The emergency communication unit 49 determines whether one group of small terminals 20 is in an emergency situation based on the data of the emergency flag SF of one group of small terminals 20 included in the terminal location related information PD. When the information determining unit 47 determines that the small terminals 20 of one group are in an emergency situation, the information determining unit 47 selects the school SC where each holder of the small terminals 20 of one group is present, and the school SC nearest to the specified position. An emergency contact will be made to the police station PS, each holder's guardian terminal, and the guardian's emergency contact information.

FIG. 10 is a diagram illustrating how the location identifying unit 43 of the server 40 identifies the location of the small terminal 20 according to the embodiment of the present application.

In this embodiment, when specifying the position of a first group of small terminals 20 including seven small terminals 20 with individual IDs aaaaa, bbbbb, ccccc, ddddd, eeeee, fffff, and ggggg as shown in FIG. I will explain about it.

The surrounding 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 residence NH where the surrounding terminal 30A is located.

Further, the surrounding terminal 30B received the data frame broadcast by the small terminal 20 of the first group at a 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 surrounding terminal 30B is located.

Further, the surrounding terminal 30C received the data frame broadcast by the small terminal 20 of the first group at a 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 who has the surrounding terminal 30C.

The position specifying unit 43 locates the small terminals 20 of the first group and their respective owners from the ranges RA, RB, and RC in which the positions of the above 3 have been specified to the shaded range OP in the figure where the respective ranges overlap. It is determined that the location is located, and range OP is generated as location specifying information for each individual ID.

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

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

First, a case will be described in which the address set by the surrounding terminal 30E installed in the residence NH2 is incorrectly input to the location of the surrounding terminal 30E1, which is relatively close to the address, such as a different address.

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

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

Next, a case will be described in which the address set by the surrounding terminal 30E installed in the residence NH2 is incorrectly input to the location of the surrounding terminal 30E2, which is far away.

The information determining unit 47 determines that the surrounding terminals are located at positions 30D and 30E2, respectively, based on the reception positions included in the terminal location related information PD transmitted from each of the surrounding terminals 30D and 30E. The information determination unit 47 calculates the distance between the two points of the surrounding 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 information determination unit 47 calculates the distance between the two points of the surrounding terminals 30D and 30E2. 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 surrounding terminals 30D and 30E to urge them to confirm whether the registered addresses are appropriate.

Note that the predetermined distance at which it is determined that there is an error in the address registered in the surrounding terminal 30 can be set arbitrarily. In this embodiment, the diameter distance of the communication range broadcast by the small terminal 20 is used as the determination threshold, but the position of the small terminal 20 predicted from the received electric field level of data frames acquired from a plurality of surrounding terminals 30 overlaps. The determination may be made by detecting whether or not there is one.

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

Similarly to FIG. 11, the surrounding terminals 30D and 30E installed in residences NH1 and NH2 receive the data frame broadcast by the small terminal 20 of the first group, and the address set by the surrounding terminal 30E is large. A case will be described in which an erroneous input is made to the position of the surrounding terminal 30E2 which is far away. In addition, if the pedestrian P is in possession of a surrounding terminal 30F that is a smartphone with a GPS function, and the surrounding terminal 30F is transmitting terminal position related information PD including the acquired position APF automatically obtained from the GPS function. I will explain about it.

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

Similar to the explanation of FIG. 9, the information determining unit 47 determines that there is an error in either the acquisition position APD, APE2, or APF of the surrounding terminal 30D, 30E2, or 30F.

At this time, the information determination unit 47 determines that there is an error in the position of the acquisition position APE2, which is the only one located far from the three acquisition positions APD, APE2, or APF of the surrounding terminals 30D, 30E2, and 30F, and 30E will be contacted to confirm whether the registered address is correct.

Further, the information determination unit 47 refers to the terminal type TT included in each of the terminal location related information PD transmitted by the surrounding terminals 30D, 30E2, or 30F, and the surrounding terminals that have automatically acquired location information in conjunction with the GPS function. It may be determined that the information on the acquisition position APF of 30F is the most reliable, and contact may be made to the surrounding terminals 30D and 30E to urge them to confirm whether the registered addresses are appropriate.

In addition, the information determination unit 47 determines that the information on the acquired position APF of the surrounding terminal 30F that has automatically acquired position information in conjunction with the GPS function is the most reliable, and the information of the surrounding terminal 30D and the surrounding terminal 30D that do not have the GPS function The terminal location related information PD of 30E may be excluded.

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

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

Next, the location-related information acquisition unit 41 determines whether terminal location-related information PD has been received from the surrounding terminals 30 (step S302).

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

Further, in step S302, if it is determined that the terminal location related information PD has been received from the surrounding terminal 30 (step S302: Yes), the location related information acquisition unit 41 transfers the received terminal location related information PD to the location specifying unit 43. , the storage section 45, the information determination section 47, and the emergency communication section 49. Further, the position specifying unit 43 specifies the owner of each of the plurality of small terminals 20 from the individual ID data string ID included in the supplied terminal location related information PD, and also identifies surrounding terminals included in the terminal location related information PD. Based on the acquisition time AT of the 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 broadcast the data frame is identified, and the individual ID of each of the plurality of small terminals 20 is determined. position specifying information is generated (step S303).

Next, the information determination unit 47 extracts the individual ID data and MAC address of the small terminal 20 that broadcast the data frame included in the terminal location related information PD, and extracts the individual ID data and MAC address from the registered data recorded in the storage unit 45. The corresponding MAC address is read, and it is determined whether the correspondence between the individual ID data and the MAC address of the small terminal 20 that broadcast the data frame included in the terminal location related information PD matches the registered data (step S304).

In step S304, if it is not determined that the correspondence between the individual ID data and the MAC address of the small terminal 20 that broadcast the data frame included in the terminal location related information PD 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 location-related information PD is a spoofed terminal, and deletes the terminal location-related information PD with the MAC address and the location specifying information generated in step S303 from the storage unit 45. (Step S305).

Next, the information determination unit 47 records the MAC address in the storage unit 45 as a blacklist (step S306). Additionally, the information determination unit 47 instructs the location specifying unit 43 to ignore the identification of the location of the spoofed terminal if the MAC address of the spoofed terminal is included in the terminal location related information PD to be acquired thereafter. may also be commanded.

Further, in step S304, if it is determined that the correspondence between the individual ID data and the MAC address of the small terminal 20 that broadcast the data frame included in the terminal location related information PD matches the registered data (step S304: Yes) , the information determination unit 47 determines, for each location specifying information specified based on the plurality of terminal location related information PD acquired within a predetermined time interval, It is determined whether the acquired position AP of the surrounding terminal 30 is correct (step S307).

In step S307, if it is determined that the acquired position AP of the plurality of surrounding terminals 30 that transmitted each of the plurality of terminal position related information PD is correct (step S307: Yes), the information determination unit 47 The information PD and the position specifying 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, if it is not determined that the acquired positions AP of the plurality of surrounding terminals 30 that have transmitted each of the plurality of terminal position related information PD is correct (step S307: No), the information determination unit 47 It is determined whether the related information PD includes information on the acquisition position AP acquired by the GPS function (step S309).

In step S309, if it is not determined that the plurality of terminal location related information PD includes the information of the acquired location AP acquired by the GPS function (step S309: No), the information determination unit 47 The position related information PD and the position specifying information generated in step S303 are discarded (step S310).

Next, the information determination unit 47 corrects each of the surrounding terminals 30 that have transmitted the plurality of terminal location related information PD if the information of the acquisition position AP set in each of the surrounding terminals 30 is incorrect. A message is sent requesting the user to do so (step S311).

Further, in step S309, if it is determined that the plurality of terminal location-related information PD includes information on the acquisition position AP acquired by the GPS function (step S309: Yes), the information determination unit 47 It is determined that the information on the acquired location AP acquired by is the most reliable, and the information other than the terminal location related information PD acquired by the GPS function and the location specifying information generated in step S303 is discarded (step S312). .

Next, the information determination unit 47 determines the acquisition position AP set for each of the surrounding terminals 30 that does not have a GPS function among the surrounding terminals 30 that have transmitted the plurality of terminal location related information PD. If the information is incorrect, a notification requesting correction is made (step S313).

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

The above processing enables the server 40 to select only appropriate information from the terminal location related information PD received from the surrounding terminals 30, and to generate and store only accurate location identifying information.

According to the present embodiment, terminal information is shared among a plurality of small terminals 20 using the first communication method, and one of the plurality of small terminals 20 uses the second communication method as a representative. By broadcasting the data frame, it becomes possible to appropriately transmit information to surrounding terminals 30 without the radio waves of the second communication method interfering with each other.

In this embodiment, a case has been described in which the small terminals 20 share terminal information among a plurality of small terminals 20 using BLE as the first communication method, but a communication method in which a plurality of small terminals 20 share terminal information is described. is not limited to this. The first communication method may be D2D (Device To Device) communication in which information is transmitted and received between small terminals.

Furthermore, in this embodiment, a case has been described in which the small terminal 20 broadcasts a data frame compliant with the IEEE802.11 communication standard as the second communication method, but the communication standard that the small terminal 20 broadcasts is not limited to this. . Regardless of whether the communication standard is such that a data frame containing information including a service ID indicating the use of a location identification system, an individual ID identifying the owner of the small terminal, and an emergency flag indicating an emergency situation can be received by surrounding terminals. Bye.

Further, in this embodiment, a case has been described in which the positions of one group of small terminals 20 are specified. However, the position specifying unit 43 of the server 40 may further specify the position of each of the small terminals 20 in one group. Specifically, for example, the small terminal 20 adds information about 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.

Furthermore, in this embodiment, the case where the peripheral terminals 30 and the server 40 are connected to the Internet connection network has been explained as an example. may be connected only to a closed network such as a WAN or LAN.

Further, in this example, an embodiment using the small terminal 20 having the above-mentioned functions has been described, but the embodiment is not limited to this. For example, the embodiment may be a mobile terminal such as a smartphone installed with a program or application that executes the function.

As a modification of this embodiment, the small terminal 20 may have a function of not only broadcasting data frames compliant with the IEEE 802.11 communication standard, but also receiving wireless communication compliant with the communication standard.

This makes it possible to receive data such as updating the communication software of the small terminal 20. Further, it is possible to receive 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. For example, an update flag indicating that the registered individual ID has been updated is transmitted to the parent terminal 50 of the home HM registered in the registration information.

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

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

As a result, the individual IDs registered in the small terminal 20 and the server 40 are updated regularly, making it possible to more reliably avoid identification of the holder H.

In addition, as a further aspect of updating the individual ID, the small terminal 20 may update the server 40 by using the connection of the small terminal 20 to the wireless communication relay device of the home HM or the connection to the network NW by wired communication as a trigger. An update request requesting an update of the individual ID may be sent to the user.

10 Location identification 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 Location-related information generation unit 35 Location-related information transmission unit 40 Server 41 Location-related information Acquisition unit 43 Location identification unit 45 Storage unit 47 Information determination unit 49 Emergency communication unit 50 Parent terminal

Claims (1)

a first information transmitter that transmits information including its own individual ID that identifies its holder and its own operating state to another terminal using a first wireless communication method;
an information receiving unit that receives an individual ID for identifying a holder of the other terminal and an operating state of the other terminal from the other terminal using the first wireless communication method;
a second transmitter that broadcasts a data frame including the self-individual ID and data indicating that the self is an access point for wireless communication using a second wireless communication method different from the first wireless communication method;
including;
The second transmitting unit adds the other individual ID to the data frame in the second wireless communication method and broadcasts the data frame based on the operating state of the own terminal and the operating state of the other terminal. Characteristic information transmission terminal.

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