JP2016034120A - Position identifying system and terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately identify the position of a terminal.SOLUTION: A position identifying system communicates with a terminal comprising an active tag that runs on electricity supplied by a power source in the tag and communicates with an active tag reader, and a passive tag that runs on electricity supplied by a passive tag reader and communicates with the passive tag reader. The position identifying system comprises: the active tag reader for receiving terminal information representing information on the terminal from the active tag; the passive tag reader for receiving a passive tag signal from the passive tag; and a position identifying unit for identifying the position of the terminal on the basis of the terminal information or the passive tag signal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for specifying the position of a terminal.

  2. Description of the Related Art Conventionally, a system that uses GPS (Global Positioning System) for position determination has been used for the purpose of watching over elderly people and children and searching for missing persons at the time of a disaster. For example, Non-Patent Document 1 introduces a service that provides GPS location information mounted on a searchable mobile phone to a terminal such as a personal computer or a smartphone via the Internet. Further, Patent Document 1 discloses a technology that can transmit position information acquired by GPS as an abnormal signal even when a terminal owner falls into a state in which an operation cannot be performed, such as when a disaster occurs. Proposed. Furthermore, in the technique of Patent Document 1, it is also possible not to transmit the position information acquired by GPS at normal times.

JP-A-2005-45743

NTT DoCoMo, Imadoco Search, https://www.nttdocomo.co.jp/service/safety/imadoco/about/index.html

By the way, in an emergency situation that requires human rescue, such as an earthquake, flood, or landslide, it is necessary to accurately determine the position of the rescuer. However, in a system using position information acquired by GPS, GPS radio waves may be blocked depending on the position of the terminal, and position information may not be acquired. For example, the terminal is in a state where it is buried in debris or earth and sand. Even if the position information can be acquired, the GPS position information generally has an error of 10 m or more, and it is difficult to specify the exact position of the terminal in the above state.
Even if the position information can be acquired, it is impossible to determine whether or not the terminal owner needs to be rescued based only on the position information. For this reason, all terminal owners must be rescued, and it may take time to rescue those who really need rescue. Furthermore, when the position information is acquired by GPS, the battery life of the terminal is shortened. Therefore, if the battery cannot be charged in an emergency situation as described above, the terminal battery may be exhausted before the terminal owner is rescued.

  In view of the above circumstances, an object of the present invention is to provide a technique capable of specifying the position of a terminal more accurately.

  One embodiment of the present invention includes an active tag that operates with power supplied from a power supply of its own device and communicates with an active tag reader, and a passive tag that operates with power supplied from a passive tag reader and communicates with a passive tag reader. A position identification system that communicates with a terminal comprising: an active tag reader that receives information about the terminal from the active tag; a passive tag reader that receives a passive tag signal from the passive tag; and the terminal information or the A position specifying unit that specifies the position of the terminal based on a passive tag signal.

  One aspect of the present invention is the above-described position specifying system, wherein the terminal information includes sensor information acquired by a sensor of the terminal or input information representing an operation input to the terminal. And the determination part which determines the necessity of rescue about the holder of the said terminal based on the said sensor information or the said input information is further provided.

  One aspect of the present invention is the above-described position specifying system, further including a storage unit that stores the acquired terminal information, wherein the determination unit stores the sensor information or the input information and the storage unit. The necessity of rescue is determined based on the received terminal information.

  One aspect of the present invention is the above-described position specifying system, further including a control unit that causes the terminal to perform a predetermined operation in order to acquire information necessary for determining whether or not rescue is necessary from the terminal.

  One aspect of the present invention is the above-described position specifying system, wherein the sensor information is information related to vibration of the terminal, the input information is information related to a button operation on the terminal, and the control unit includes: The terminal owner is caused to output a voice message that prompts the terminal owner to operate the terminal, and the determination unit possesses the terminal based on the sensor information or the input information acquired according to the output of the voice message. Determine if rescue is necessary.

  One aspect of the present invention is the above positioning system, wherein the terminal information is information including identification information of the terminal, and the passive tag signal is a signal including identification information of a passive tag that has transmitted the passive tag signal. When the identification information acquired from the passive tag signal matches the identification information of the terminal determined to be a rescue target, the position specifying unit specifies the position of the terminal determined to be a rescue target. Judge that.

  One aspect of the present invention is the above-described position specifying system, wherein the passive tag reader outputs identification information included in a passive tag signal acquired from a terminal determined to be a rescue target to the determination unit.

  One aspect of the present invention is the above-described position specifying system, wherein the control unit controls a timing at which the active tag performs reception processing by changing an operation mode of the terminal.

  One aspect of the present invention is the above-described position specifying system, further including a display unit that displays that the position of the terminal of the rescuer is specified.

  One aspect of the present invention is an active tag reader that communicates with an active tag, a passive tag reader that communicates with a passive tag, terminal information representing information about the active tag and a terminal including the passive tag, or transmitted from the terminal A terminal that communicates with a position identification system that identifies a position of the terminal based on a passive tag signal, the terminal being operated by power supplied from a power source of the own apparatus, and an active tag that transmits the terminal information to the active tag reader; And a passive tag that operates by power supplied from the passive tag reader and transmits the passive tag signal to the passive tag reader.

  One aspect of the present invention is the terminal described above, wherein the active tag receives information transmitted from the location specifying system at a timing at which the terminal information is transmitted; It operates in any one of the second mode in which information to be transmitted is always received.

  One aspect of the present invention is the above-described location system, wherein the active tag performs acquisition and transmission of the terminal information in a first period in the first mode, and the first tag in the second mode. In the second mode, the terminal information is acquired and transmitted even at a timing when an instruction is received from the position specifying system.

  According to the present invention, the position of the terminal can be specified more accurately.

It is a system configuration figure showing the system configuration of position specifying system 1 of an embodiment. It is a figure which shows the specific example of the format of a beacon signal. It is a sequence diagram which shows the outline | summary of the operation | movement in the normal time of the position specifying system 1 of embodiment. It is a sequence diagram which shows the outline | summary of the operation | movement at the time of emergency of the position specifying system 1 of embodiment. It is a sequence diagram which shows the flow of the process in which the operation mode of the terminal 2 is changed into emergency mode. It is a sequence diagram which shows the flow of the process in which the operation mode of the terminal 2 is changed into the normal mode. It is a figure which shows the specific example of a response signal and a terminal instruction | indication signal. It is a figure which shows the specific example of the command of a response signal and a terminal instruction | indication signal, and a payload. 3 is a functional block diagram showing a functional configuration of an active tag 21. FIG. 3 is a functional block diagram showing a functional configuration of a server 5. FIG. It is a figure which shows the specific example of the terminal information table 541. It is a figure which shows the specific example of the accumulation | storage information table 551. FIG. 3 is a functional block diagram showing a functional configuration of an active tag reader 31. FIG. It is a figure which shows the specific example of the operation mode management table 3141. FIG. It is a sequence diagram which shows the flow of the process in the position identification system 1 of embodiment. It is a flowchart which shows the flow of a terminal state determination process. It is a figure which shows the specific example of a voice message. It is a figure which shows the example of a determination in a terminal state determination process. It is a flowchart which shows the flow of a position specific process. It is a flowchart which shows the flow of the terminal state determination process of a modification. It is a flowchart which shows the flow of the terminal state determination process of a modification. It is a figure which shows the example of a determination in the terminal state determination process of a modification.

FIG. 1 is a system configuration diagram illustrating a system configuration of a position specifying system 1 according to the embodiment.
Terminals 2-1 to 2-n (n is an integer equal to or greater than 1) are terminals whose positions are specified by the position specifying system 1. Terminals 2-1 to 2-n are carried by the owner of the terminal. The terminals 2-1 to 2-n are provided with an active tag 21 and a passive tag 22 and communicate with the base station 3. The active tag 21 periodically transmits a beacon signal to the base station 3. The terminals 2-1 to 2-n include various devices such as an output device for transmitting various information to the owner, an input device for the owner to input an operation, and a sensor for acquiring the terminal status. Prepare. In the example of FIG. 1, the terminals 2-1 to 2-n include a speaker 23 and an LED (Light Emitting Diode) 24 as output devices, a switch 25 as an input device, and a vibration sensor 26 as a sensor. The terminals 2-1 to 2-n include information related to these devices (hereinafter referred to as “device information”) and information related to the device such as identification information as terminal information in the beacon signal. The passive tag 22 transmits a passive tag signal in response to a request from the base station 3. Hereinafter, for the sake of simplicity, terminals 2-1 to 2-n are referred to as terminals 2 unless otherwise specified. Note that the terminal 2 is operated by the power supplied from the battery 27.

  The location system 1 includes a base station 3, a network 4 and a server 5. The base station 3 includes an active tag reader 31 and a passive tag reader 32. The active tag reader 31 performs wireless communication with the active tag 21 of the terminal 2. The active tag reader 31 receives a beacon signal transmitted from the active tag 21 of the terminal 2. The passive tag reader 32 performs wireless communication with the passive tag 22 of the terminal 2. The passive tag reader 32 requests the passive tag 22 to transmit a passive tag signal. The passive tag reader 32 receives a passive tag signal transmitted from the passive tag 22. The base station 3 communicates with the server 5 via the network 4. The base station 3 acquires terminal information from the beacon signal and transmits the acquired terminal information to the server 5. In addition, the base station 3 acquires terminal instruction information indicating instructions regarding operations of the own apparatus and the terminal 2 from the server 5. The active tag reader 31 generates a transmission signal by wireless communication (hereinafter referred to as “terminal instruction signal”) based on the terminal instruction information. The base station 3 transmits a terminal instruction signal to the active tag 21 of the terminal 2.

  Note that the passive tag reader 32 of the base station 3 can operate by being disconnected from the base station 3. The passive tag reader 32 includes a wireless communication interface in addition to the communication interface used for communication with the passive tag 22, and transmits a passive tag signal to the base station 3 main body or the server 5 even when operating separately from the base station 3. Is possible. In this case, a mobile phone line, a wireless local area network (LAN), Bluetooth (registered trademark), or the like may be used for wireless communication between the passive tag reader 32 and the base station 3 main body or the server 5.

The network 4 is a network between the base station 3 and the server 5. The network 4 is a network such as the Internet, a LAN, or a WAN (Wide Area Network).
The server 5 identifies the position of the terminal 2 based on the passive tag signal transmitted from the base station 3. Further, the server 5 determines the state of the terminal 2 based on the terminal information, and determines whether or not the owner of the terminal 2 needs to be rescued, the priority of rescue, and the like.

  Specifically, when an emergency such as a disaster occurs, the server 5 transmits terminal instruction information to the base station 3 in order to acquire information necessary for specifying the position of the terminal 2 and the above determination. The base station 3 generates a terminal instruction signal from the terminal instruction information and transmits the generated terminal instruction signal to the terminal 2. The terminal 2 performs an operation instructed by the terminal instruction information. When the terminal 2 performs the instructed operation, the terminal 2 acquires terminal information and transmits it to the base station 3. At this time, the device information included in the terminal information includes an execution result of the operation executed by the terminal 2, information acquired by executing the operation, and the like. The terminal information is relayed to the server 5 by the base station 3. The server 5 determines the position of the terminal 2 based on the terminal information, whether or not the owner of the terminal 2 needs to be rescued, priority of rescue, and the like. Below, the state where the above-mentioned emergency has occurred is called an emergency, and the normal state is called normal.

  Next, the function part of the terminal 2 will be supplemented. The speaker 23 is a device that outputs sound. The LED 24 is a light emitting diode. LED24 may be comprised using apparatuses other than LED, if it is an apparatus which has a light emission function. The switch 25 is an input device for inputting an operation to the terminal 2. For example, the switch 25 is an input button that receives an input by pressing. In the present embodiment, the switch 25 is configured using two input buttons, a red button and a green button. The vibration sensor 26 is a sensor that detects the vibration of the device itself.

  The passive tag 22 is a wireless communication tag that operates with electric power supplied by a passive tag reader. Specifically, the passive tag 22 operates by converting radio waves transmitted by the passive tag reader into electric power by electromagnetic induction or the like. Therefore, unlike the active tag 21, the passive tag 22 does not require a power source such as a battery for its operation. The passive tag 22 communicates with the passive tag reader 32 of the base station 3. In the passive tag 22, a passive tag ID that is identification information of the passive tag 22 is recorded in advance. The passive tag 22 transmits a passive tag signal including the passive tag ID to the passive tag reader 32 in response to a request from the base station 3.

  In general, a passive tag can perform wireless communication within a range of several meters. Passive tags and passive tag readers include those that perform communication by the electromagnetic induction method in the 13.56 MHz band and others and those that perform communication by the radio wave method in the 920 MHz band and the 2.4 GHz band. The passive tag 22 and the passive tag reader 32 used in the embodiment may be any type. In the present embodiment, the information necessary as information included in the passive tag signal is only the passive tag ID, and the format of the passive tag signal is not limited to a special format. Therefore, as the passive tag 22 and the passive tag reader 32 according to the embodiment, a general passive tag and reader having no special specification can be used.

FIG. 2 is a diagram illustrating a specific example of the format of the beacon signal.
FIG. 2 shows an item of data included in the beacon signal and the number of bits occupied by the data of the item. In the example of FIG. 2, the beacon signal includes items of version, sequence, status notification, mode, terminal ID, and payload. The number of bits of each item is 8, 24, 24, 8, 96, and 96, respectively. The version is information indicating the firmware version of the terminal 2. The sequence represents the sequence number of the beacon signal transmitted by the terminal 2. The state notification is information indicating the state of the terminal 2 such as the voltage of the battery 27, the transmission interval and transmission output of the beacon signal, and the temperature. The mode is information indicating the operation mode of the terminal 2. The operation mode of the terminal 2 includes a normal mode and an emergency mode. The normal mode is an operation mode in normal times. The emergency mode is an operation mode when the position of the terminal 2 is specified due to the occurrence of a disaster or the like. The terminal ID is terminal identification information. The payload is an actual data portion of information transmitted by the beacon signal, and the payload can include arbitrary information depending on the application. In this embodiment, device information is stored in the payload.

FIG. 3 is a sequence diagram illustrating an outline of the operation in the normal time of the position specifying system 1 of the embodiment.
First, the active tag 21 of the terminal 2 transmits a beacon signal including terminal information to the active tag reader 31 of the base station 3 (step S101). The base station 3 acquires terminal information from the received beacon signal and transmits it to the server 5 (step S102). And the base station 3 transmits the response signal which notifies that the beacon signal was received to the terminal 2 (step S103). When the terminal 2 receives the response signal, the terminal 2 stands by for processing until the next beacon signal is transmitted. After the standby, the terminal 2 transmits a beacon signal to the base station 3 as in step S101 (step S104). The base station 3 transmits terminal information to the server 5 as in step S102 (step S105). The base station 3 transmits a response signal to the terminal 2 as in step S103 (step S106). Thereafter, the terminal 2, the base station 3, and the server 5 repeatedly execute similar processing.

Note that, in the normal position specifying system 1, the above-described beacon signal is periodically transmitted and received. In the present embodiment, transmission and reception of beacon signals at normal times are performed at a period of “first beacon signal transmission interval” in the figure. Therefore, for example, when the switch 25 of the terminal 2 is pressed during the first beacon signal transmission interval (step S107), the terminal information indicating that the switch 25 is pressed is transmitted at the timing of step S104. Sent by a beacon signal. Thus, the power consumption of the terminal 2 is suppressed by periodically transmitting and receiving the beacon signal.
When the server 5 generates terminal instruction information in normal times, the base station 3 may transmit the terminal instruction information to the terminal 2 by including the terminal instruction information in the response signal.

FIG. 4 is a sequence diagram illustrating an outline of an operation in an emergency of the position specifying system 1 according to the embodiment.
In the emergency location system 1, beacon signals are periodically transmitted and received in the same manner as in the normal state of FIG. 3. Furthermore, in the location specifying system 1 in an emergency, beacon signals are transmitted / received in response to an instruction from the server 5 or operations of various devices of the terminal 2 in addition to periodic transmission / reception.
First, the server 5 generates terminal instruction information (step S201). The server 5 transmits the generated terminal instruction information to the base station 3 (step S202). For example, in FIG. 4, the server 5 generates terminal instruction information that causes the speaker 23 to output sound. Note that the terminal instruction information in FIG. 4 is an example, and the server 5 may generate terminal instruction information for operating a device other than the speaker 23. For example, the server 5 may generate terminal instruction information that turns on the LED 24. The server 5 generates terminal instruction information in accordance with information necessary for determining the position of the terminal 2, the necessity of rescue of the owner of the terminal 2, the priority of rescue, and the like.

  The base station 3 acquires terminal instruction information. The active tag reader 31 of the base station 3 converts the terminal instruction information into a radio signal and generates a terminal instruction signal. The active tag reader 31 wirelessly transmits the generated terminal instruction signal to the active tag 21 of the terminal 2 (step S203). Terminal 2 receives the terminal instruction signal. The terminal 2 acquires terminal instruction information from the terminal instruction signal, and causes various devices of its own apparatus to perform operations indicated by the terminal instruction information. In FIG. 4, the terminal 2 causes the speaker 23 to output sound (step S204). When the terminal 2 operates various devices, the terminal 2 acquires terminal information and generates a beacon signal including the terminal information. The terminal 2 transmits a beacon signal to the base station 3 (step S205). The base station 3 receives a beacon signal. The base station 3 acquires terminal information from the received beacon signal and transmits it to the server 5 (step S206). In FIG. 4, terminal information indicating the audio output result of the speaker 23 is included in the beacon signal. When transmitting the terminal information to the server 5, the base station 3 transmits a response signal to the terminal 2 (step S207). As described above, in the emergency location system 1, beacon signals are transmitted and received according to instructions from the server 5.

  Further, when various devices are operated in the terminal 2, the terminal 2 generates a beacon signal using information related to operations of the various devices as terminal information. FIG. 4 shows a case where the switch 25 is pressed on the terminal 2 (step S208). The terminal 2 generates a beacon signal using information related to the switch pressing operation as terminal information. The terminal 2 transmits a beacon signal to the base station 3 (step S209). The base station 3 receives a beacon signal. The base station 3 acquires terminal information from the received beacon signal and transmits it to the server 5 (step S210). When transmitting the terminal information to the server 5, the base station 3 transmits a response signal to the terminal 2 (step S211). As described above, in the emergency location system 1, beacon signals are transmitted and received in response to operations of various devices of the terminal 2.

The server 5 determines the state of the terminal 2 based on the terminal information, and performs a terminal state determination process for determining whether the owner of the terminal 2 needs to be rescued (step S212). After transmitting the beacon signal in step S209, the terminal 2 waits for the “second beacon signal transmission interval” and then periodically transmits a beacon signal (step S213). The base station 3 receives the beacon signal transmitted from the terminal 2. The base station 3 acquires terminal information from the received beacon signal and transmits it to the server 5 (step S214). When transmitting the terminal information to the server 5, the base station 3 transmits a response signal to the terminal 2 (step S215). The second beacon signal transmission interval is shorter than the first beacon signal transmission interval.
As described above, in the emergency location system 1, transmission / reception of the beacon signal is performed at least at a period of “second beacon signal transmission interval”. At this time, by operating in the emergency mode, the terminal 2 can always execute the reception process of the terminal instruction signal and the transmission process of the beacon signal. The operation mode of the terminal 2 is controlled by the server 5. Next, a flow of processing for changing the operation mode of the terminal 2 from the normal mode to the emergency mode will be described.

FIG. 5 is a sequence diagram showing a flow of processing for changing the operation mode of the terminal 2 to the emergency mode.
At the start of the sequence in FIG. 5, the terminal 2 is operating in the normal time mode. The terminal 2, the base station 3, and the server 5 regularly transmit and receive beacon signals as in FIG. 3 (steps S301 to S303). Then, the server 5 is notified that an emergency such as a disaster has occurred. Upon receiving notification that an emergency has occurred (step S304), the server 5 generates mode transition instruction information for causing the terminal 2 to transition to the emergency mode (step S305). The server 5 transmits the generated mode transition instruction information to the base station 3 (step S306). When receiving the mode transition instruction information, the base station 3 stands by for transmission of a beacon signal that is performed after step S301. Terminal 2 transmits a periodic beacon signal following step S301 (step S307). The base station 3 receives the beacon signal and transmits terminal information to the server 5 as in step S303 (step S308).

  The base station 3 includes the mode transition instruction information in the response signal to the received beacon signal and transmits it to the terminal 2 (step S309). The terminal 2 receives the response signal and acquires mode transition instruction information from the response signal. The terminal 2 changes the operation mode of its own device to the emergency mode based on the mode transition instruction information (Step S310). When the operation mode is changed, the terminal 2 transmits a beacon signal including terminal information indicating that the change of the operation mode is completed (step S311). Specifically, the terminal 2 transmits a beacon signal by setting a value indicating the emergency mode in the item of the operation mode included in the beacon signal. The base station 3 acquires terminal information from the received beacon signal and transmits it to the server 5 (step S312). The base station 3 transmits a response signal for the beacon signal to the terminal 2 (step S313). The base station 3 and the server 5 determine from the acquired terminal information that the operation mode of the terminal 2 has been changed to the emergency mode (steps S314 and S315).

  Thus, by changing the operation mode to the emergency mode, the terminal 2 can transmit a beacon signal without waiting for a regular transmission timing in an emergency. Further, by changing the operation mode to the emergency mode, the terminal 2 can always receive the terminal instruction signal, and can acquire the terminal instruction information without waiting for the response signal to be received. The base station 3 stores that the terminal 2 has been changed to the emergency mode, and performs an operation according to the emergency mode such as transmitting a terminal instruction signal without waiting for a beacon signal.

FIG. 6 is a sequence diagram showing a flow of processing for changing the operation mode of the terminal 2 to the normal mode.
At the start of the sequence of FIG. 6, the terminal 2 is operating in the emergency mode. The terminal 2, the base station 3, and the server 5 regularly transmit and receive beacon signals as in FIG. 4 (steps S401 to S403). Then, in the terminal state determination process, when the owner of the terminal 2 is determined not to be rescued, the server 5 generates terminal instruction information for shifting the operation mode of the terminal 2 to the normal mode (step S404). ). The server 5 transmits the generated mode transition instruction information to the base station 3 (step S405). The base station 3 generates a terminal instruction signal including mode transition instruction information. The base station 3 transmits a terminal instruction signal to the terminal 2 (step S406).

  The terminal 2 acquires mode transition instruction information from the terminal instruction signal. The terminal 2 changes the operation mode of its own device to the normal mode based on the mode transition instruction information (step S407). When the operation mode is changed, the terminal 2 transmits a beacon signal including terminal information indicating that the change of the operation mode is completed (step S408). Specifically, the terminal 2 transmits a beacon signal by setting a value indicating the normal mode in the item of the operation mode included in the beacon signal. The base station 3 acquires terminal information from the received beacon signal and transmits it to the server 5 (step S409). The base station 3 transmits a response signal for the beacon signal to the terminal 2 (step S410). The base station 3 and the server 5 determine from the acquired terminal information that the operation mode of the terminal 2 has been changed to the normal mode (steps S411 and S412).

FIG. 7 is a diagram illustrating specific examples of the response signal and the terminal instruction signal.
FIG. 7 shows an example of the format of the response signal and the terminal instruction signal. FIG. 7 shows an item of data included in the response signal and the terminal instruction signal and the number of bits occupied by the data of the item. In the example of FIG. 7, the response signal and the terminal instruction signal have values of a terminal ID, a base station ID, a status notification, a command, and a payload. The number of bits of each item is 64, 64, 8, 8, and 8. The terminal ID is identification information of the terminal 2 that is a transmission destination of the response signal and the terminal instruction signal. The base station ID is identification information of the base station 3 that has transmitted the response signal and the terminal instruction signal. The state notification is information regarding the state of the base station 3 indicated by the base station ID. The command is information indicating the type of instruction notified to the terminal 2 by the response signal and the terminal instruction signal. The payload is information indicating the details of the instruction indicated by the command value.

FIG. 8 is a diagram illustrating specific examples of commands and payloads of response signals and terminal instruction signals.
In the example of FIG. 8, the command value when the response signal and the terminal instruction signal do not include an instruction for the terminal 2 is “0x00”, and the command value when the response signal and the terminal instruction signal include mode transition information is “0x01”. ", Indicating that the value of the command when the response signal and the terminal instruction signal include terminal instruction information is represented by" 0x02 ". Further, in the example of FIG. 8, when the command value is “0x01” and the mode transition information is information instructing the transition to the normal mode, the value “0x00” is set in the payload, and the transition to the emergency mode is performed. In the case of the instructing information, it indicates that a value of “0x01” is set in the payload. The example of FIG. 8 indicates that when the terminal instruction information is information instructing to turn on the LED 24, the instruction is indicated by the value of the first or second bit in the payload. Similarly, the voice output instruction to the speaker 23 indicates that it is indicated by the value of the third to fifth bits in the payload. Further, when mode transition information is instructed, it is indicated by the value of the sixth bit in the payload.

FIG. 9 is a functional block diagram showing a functional configuration of the active tag 21.
The active tag 21 includes a transmission unit 211, a reception unit 212, a device control unit 213, a mode management unit 214, a beacon signal generation unit 215, and a timing control unit 216.
The transmission unit 211 transmits a beacon signal to the active tag reader 31 of the base station 3. Specifically, the transmission unit 211 modulates the beacon signal output from the beacon signal generation unit 215, converts the modulated wave into an analog signal, and wirelessly transmits the analog signal.

  The receiving unit 212 receives a response signal and a terminal instruction signal from the active tag reader 31 of the base station 3. Specifically, the receiving unit 212 demodulates the received modulated wave. The receiving unit 212 acquires mode transition instruction information or terminal instruction information from a response signal or terminal instruction information converted into a digital signal before or after demodulation. In normal times, the reception unit 212 performs reception processing at the timing notified from the timing control unit 216. The transmission unit 211 is notified of the timing of performing the reception process following the transmission process performed at the first beacon signal transmission interval. On the other hand, in an emergency, the reception unit 212 is in a state where reception processing is always possible. The reception unit 212 outputs the mode transition instruction information to the mode management unit 214. The receiving unit 212 outputs terminal instruction information to the device control unit 213. The receiving unit 212 outputs response signal reception information indicating that the response signal has been received to the timing control unit.

  The device control unit 213 controls operations of various devices of the terminal 2 (in FIG. 1, the speaker 23, the LED 24, the switch 25, and the vibration sensor 26). The device control unit 213 operates these various devices based on the terminal instruction information, and outputs information related to the operation of the various devices to the beacon signal generation unit 215 as device information. For example, the device information includes information indicating an operation result of the speaker 23 and the LED 24, an input operation to the switch 25, a measurement result by the vibration sensor 26, and the like.

  The mode management unit 214 manages the operation mode of the terminal 2. Specifically, the mode management unit 214 changes the operation mode of the own device based on the mode transition instruction information. The mode management unit 214 outputs mode information indicating the changed operation mode to the beacon signal generation unit 215 and the timing control unit 216.

The beacon signal generation unit 215 generates terminal information based on the mode information and device information. The beacon signal generation unit 215 generates a beacon signal from the terminal information based on the format shown in the example of FIG. The beacon signal generation unit 215 outputs the generated beacon signal to the transmission unit 211 based on the transmission timing of the beacon signal output from the timing control unit 216 during normal operation. In an emergency, the beacon signal generation unit 215 outputs the generated beacon signal to the transmission unit 211 based on reception of device information or based on the transmission timing of the beacon signal output from the timing control unit 216.
The timing control unit 216 controls the transmission timing of the beacon signal based on the response signal reception information and the mode information. Specifically, the timing control unit 216 generates a transmission timing at the first beacon signal transmission interval in the normal mode, and generates a transmission timing at the second beacon signal transmission interval in the emergency mode. The timing control unit 216 notifies the beacon signal generation unit 215 of the transmission timing of the generated beacon signal. Further, in the normal mode, the timing control unit 216 notifies the reception unit 212 of the reception timing following the notification of the transmission timing to the beacon signal generation unit 215.

FIG. 10 is a functional block diagram illustrating a functional configuration of the server 5.
The server 5 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus, and executes a server program. The server 5 executes the communication unit 51, the display unit 52, the external situation acquisition unit 53, the terminal information storage unit 54, the accumulated information storage unit 55, the terminal control unit 56, the state determination unit 57, and the position specifying unit 58 by executing the server program. It functions as a device provided. All or some of the functions of the server 5 may be realized by using hardware such as an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). The server program may be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, or a storage device such as a hard disk built in the computer system. The server program may be transmitted via a telecommunication line.

The communication unit 51 is configured using a communication interface such as a LAN. The communication unit 51 communicates with the base station 3 via the network 4. In addition, the communication unit 51 communicates with the passive tag reader 32 when the passive tag reader 32 operates by being disconnected from the base station 3. The communication unit 51 outputs the passive tag ID included in the passive tag signal to the position specifying unit 58. In addition, the communication unit 51 transmits the passive tag ID indicated by the passive tag ID notification notified from the position specifying unit 58 to the passive tag reader 32.
The display unit 52 is configured using a display device such as a CRT (Cathode Ray Tube) display, a liquid crystal display, or an organic EL display. The display unit 52 displays information related to the state determination and position specification of the terminal 2 for each terminal. The display unit 52 may be configured as an interface for connecting the display device.

The external situation acquisition unit 53 acquires information indicating the external situation. For example, the external situation acquisition unit 53 acquires information related to the occurrence of a disaster (hereinafter referred to as “disaster information”) and determines whether or not a disaster has occurred. For example, the external situation acquisition unit 53 includes a communication interface such as a LAN, and acquires disaster information from an external system. The external situation acquisition unit 53 acquires disaster information indicating that a disaster such as an earthquake, a volcanic eruption, or a landslide occurred. Further, for example, the external situation acquisition unit 53 acquires disaster information indicating that the measured value has exceeded a predetermined threshold from an observation device such as a vibration sensor installed around the device itself. Based on the disaster information acquired in this way, the external situation acquisition unit 53 determines whether or not a disaster has occurred. When the external situation acquisition unit 53 determines that a disaster has occurred, it notifies the terminal control unit 56 of the occurrence of the disaster.
Note that the external situation acquisition unit 53 may be configured to acquire information related to an event other than a disaster as long as it is an event that requires terminal location specification or state determination. For example, the external situation acquisition unit 53 may acquire information related to searching for missing persons. For example, the external situation acquisition unit 53 acquires search information indicating the occurrence situation of the deaf person. In this case, the external situation acquisition unit 53 determines whether or not a deaf person has occurred based on the search information. When it is determined that a deaf person has occurred, the external situation acquisition unit 53 notifies the terminal control unit 56 of a notification that a deaf person has occurred.

The terminal information storage unit 54 stores a terminal information table 541. The terminal information table 541 is a table that stores information on the terminal 2 that is the target of position specification.
FIG. 11 is a diagram illustrating a specific example of the terminal information table 541.
The terminal information table 541 has a terminal information record for each terminal ID. A terminal information record has each value of terminal ID and passive tag ID. The terminal ID is identification information of the terminal 2. The passive tag ID is identification information of the passive tag 22 provided in the terminal 2. The terminal information record is registered in the terminal information table 541 in advance by the administrator of the position specifying system 1.

Returning to the description of FIG.
The accumulated information storage unit 55 stores an accumulated information table 551. The accumulated information table 551 is a table for accumulating terminal information, status determination result, position specifying information, and the like for each terminal 2. An example of the accumulated information table 551 in this embodiment is shown below.

FIG. 12 is a diagram showing a specific example of the accumulated information table 551.
The accumulation information table 551 has an accumulation information record for each terminal ID. The accumulated information record has values of terminal ID, time information, terminal control information, terminal information, and status information. The terminal ID is identification information of the terminal 2. The time information represents the time when the accumulated information record is registered. The terminal control information is terminal instruction information or mode transition instruction information notified to the terminal 2. The terminal information is information regarding the terminal 2 included in the beacon signal. The state information represents the state of the terminal 2 determined based on the terminal information, for example, whether or not the rescue is necessary, whether or not the position is specified, or the rescue target priority. The accumulated information record is registered or updated by the terminal control unit 56, the state determination unit 57, and the position specifying unit 58.

Returning to the description of FIG.
The terminal control unit 56 generates information for controlling the operation of the terminal 2. Specifically, when receiving a notification of the occurrence of a disaster from the external situation acquisition unit 53, the terminal control unit 56 generates mode transition instruction information for shifting the operation mode of the terminal 2 to the emergency mode. Further, the terminal control unit 56 generates terminal instruction information for causing the terminal 2 to perform a predetermined operation in order to acquire information necessary for determining the state of the owner of the terminal 2. In addition, the terminal control unit 56 generates mode transition instruction information for shifting the operation mode of the terminal 2 determined to be out of the rescue target to the normal mode. The terminal control unit 56 transmits the generated terminal instruction information and mode transition instruction information to the base station 3. The terminal control unit 56 outputs the notified terminal control information to the accumulated information storage unit 55.

  The state determination unit 57 determines the state of the owner of the terminal 2 based on the terminal information transmitted from the base station 3. The state determination unit 57 outputs the determination result to the terminal control unit 56. Further, the state determination unit 57 generates a storage information record based on the determination result and the terminal information and registers it in the storage information table 551. When the terminal 2 is determined as a rescue target, the state determination unit 57 outputs the terminal ID of the terminal 2 to the position specifying unit 58. The state determination unit 57 outputs the state information determined as the acquired terminal information to the accumulated information storage unit 55.

  The position specifying unit 58 specifies the position of the terminal 2 determined as a rescue target. Specifically, the position specifying unit 58 acquires the terminal ID of the terminal 2 determined as the rescue target from the state determination unit 57. The position specifying unit 58 refers to the terminal information table 541 and selects a terminal information record having the terminal ID acquired from the state determining unit 57 as a value. The position specifying unit 58 acquires the value of the passive tag ID from the selected terminal information record. When the passive tag ID acquired from the terminal information table 541 is equal to the passive tag ID included in the passive tag signal received by the communication unit 51, the position specifying unit 58 is located near the passive tag reader 32 that has received the passive tag signal. It is determined that the terminal 2 is located. The position specifying unit 58 outputs information (position specifying information) indicating that the position of the terminal 2 has been specified to the accumulated information storage unit 55.

FIG. 13 is a functional block diagram showing a functional configuration of the active tag reader 31.
The active tag reader 31 includes a transmission unit 311, a reception unit 312, a server communication unit 313, a mode information storage unit 314, a transmission signal generation unit 315, a mode information management unit 316, and a timing control unit 317.
The transmission unit 311 transmits a terminal instruction signal or a response signal to the active tag 21 of the terminal 2. Specifically, the transmission unit 311 modulates the response signal or the terminal instruction signal output from the transmission signal generation unit 315, converts the modulated wave into an analog signal, and wirelessly transmits the analog signal. The transmission unit 311 may transmit the transmission of the terminal instruction signal or the response signal by broadcast, may be transmitted by multicast designating the group of the destination terminal 2, or designates the destination terminal 2 You may transmit by unicast.

The receiving unit 312 receives a beacon signal from the active tag 21 of the terminal 2. Specifically, the receiving unit 312 demodulates the modulated wave of the received beacon signal. The receiving unit 312 acquires terminal information from a digital beacon signal obtained before or after demodulation. The reception unit 312 outputs the mode information included in the terminal information to the mode information management unit 316. In addition, the receiving unit 312 outputs terminal information to the server communication unit 313.
The server communication unit 313 is configured using a communication interface such as a LAN. The server communication unit 313 transmits the terminal information output from the reception unit 312 to the server 5. Further, the server communication unit 313 outputs the mode transition instruction information and the terminal instruction information transmitted from the server 5 to the transmission signal generation unit 315.

  The mode information storage unit 314 stores an operation mode management table 3141. The operation mode management table 3141 is a table that stores an operation mode for each terminal 2.

FIG. 14 is a diagram showing a specific example of the operation mode management table 3141.
The operation mode management table 3141 has an operation mode management record for each terminal ID. The operation mode management record has each value of terminal ID and mode information. The terminal ID is identification information of the terminal 2. The mode information represents the operation mode of the terminal 2. As the value of the mode information, either “normal” that is a value representing the normal mode or “emergency” that is a value representing the emergency mode is registered. In the operation mode management table 3141, an operation mode management record having “normal” as the value of the mode information is registered in advance. In the operation mode management table 3141, the value of mode information is updated by the mode information management unit 316.

Returning to the description of FIG.
The transmission signal generation unit 315 generates a transmission signal to be transmitted to the active tag 21 of the terminal 2. Specifically, the transmission signal generation unit 315 generates a response signal or a terminal instruction signal as a transmission signal. The transmission signal generation unit 315 generates a response signal including mode transition instruction information output from the server communication unit 313. In addition, transmission signal generation section 315 generates a terminal instruction signal including terminal instruction information and mode transition instruction information output from server communication section 313. The transmission signal generation unit 315 outputs the generated response signal or terminal instruction signal to the transmission unit 311. The transmission signal generation unit 315 generates a response signal at the timing notified by the timing control unit 317.

The mode information management unit 316 manages the operation mode of the terminal 2. Specifically, the mode information management unit 316 acquires the operation mode of the transmission source terminal 2 from the terminal information notified from the reception unit 312. The mode information management unit 316 refers to the operation mode management table 3141 and updates the value of the mode information in the operation mode management record corresponding to the transmission source terminal 2.
The timing control unit 317 controls the timing at which the transmission signal generation unit 315 generates a response signal. Specifically, the timing control unit 317 notifies the timing for generating the response signal at the timing when the reception unit 312 receives the reception of the beacon signal.

FIG. 15 is a sequence diagram illustrating a processing flow in the position specifying system 1 according to the embodiment.
First, the external status acquisition unit 53 of the server 5 determines whether or not a disaster has occurred based on the disaster information (step S501). When it is determined that no disaster has occurred (step S501—NO), the external situation acquisition unit 53 repeats the process of step S501. On the other hand, when it is determined that a disaster has occurred (step S501—YES), the external situation acquisition unit 53 notifies the terminal control unit 56 of the occurrence of the disaster. Receiving the notification of the occurrence of the disaster, the terminal control unit 56 generates mode transition instruction information. The terminal control unit 56 transmits the generated mode transition instruction information to the base station 3 (step S502). The base station 3 transmits the mode transition instruction information transmitted from the server 5 to the terminal 2. When the terminal 2 receives the mode transition instruction information, the terminal 2 changes its own operation mode to the emergency mode.

  When the mode transition instruction information is transmitted, the state determination unit 57 of the server 5 executes terminal state determination processing (step S503). The terminal state determination process is a process for determining whether the owner needs to be rescued for each terminal 2. The state determination unit 57 notifies the terminal control unit 56 of the terminal ID of the terminal 2 to be determined and the determination result. The terminal control unit 56 determines whether or not the determination target terminal 2 is a rescue target (step S504). When the determination target terminal 2 is not a rescue target (step S504—NO), the terminal control unit 56 generates mode shift instruction information for shifting the operation mode of the terminal 2 to the normal mode. The terminal control unit 56 transmits the generated mode transition instruction information to the base station 3 (step S505). The base station 3 transmits the mode transition instruction information transmitted from the server 5 to the terminal 2. When the terminal 2 receives the mode transition instruction information, the terminal 2 changes its own operation mode to the normal mode.

On the other hand, when the determination target terminal 2 is a rescue target in step S504 (step S504-YES), the position specifying unit 58 executes the position specifying process of the terminal 2 (step S506). The position specifying process is a process of detecting that the passive tag reader 32 has received a passive tag signal from the rescue target terminal 2.
Thus, in the position specifying system 1 of the embodiment, the operation mode of the terminal 2 is changed to the emergency mode in an emergency, and the position of the terminal 2 to be rescued is determined by performing the terminal state determination process and the position specifying process. Identified. Next, details of the terminal state determination process and the position specifying process will be described.

FIG. 16 is a flowchart showing the flow of the terminal state determination process.
In the terminal state determination process, the server 5 causes the terminal 2 to be determined to output a predetermined voice message. The server 5 determines whether the owner of the terminal 2 needs to be rescued based on the presence / absence of an input operation indicating a response to the voice message. First, the voice message used in the flowchart of FIG. 16 will be described.

FIG. 17 is a diagram illustrating a specific example of a voice message.
The voice message 1 is a message notifying that an earthquake has occurred. The voice message 2 is a message that prompts the owner of the terminal 2 that does not need rescue to indicate that the rescue is unnecessary. The voice message 3 is a message that prompts the owner of the terminal 2 that needs rescue to display an intention to rescue. Similar to the voice message 3, the voice message 4 is a message that prompts the owner of the terminal 2 that needs to be rescued to indicate that the rescue is necessary. The voice message 5 is a message notifying the holder of the terminal 2 that the terminal 2 has been recognized as a rescue target.

Returning to the description of FIG.
First, the terminal control unit 56 of the server 5 transmits terminal instruction information for causing the terminal 2 to be determined to output the voice message 1 (step S601). The device control unit 213 of the terminal 2 causes the speaker 23 to output the voice message 1. The speaker 23 outputs the voice message 1. Next, the terminal control unit 56 transmits terminal instruction information for causing the terminal 2 to be determined to output the voice message 2 (step S602). The speaker 23 outputs the voice message 2. The terminal 2 acquires device information of the switch 25 and transmits a beacon signal. The state determination unit 57 of the server 5 acquires device information from the terminal information, and determines whether or not the green button designated by the voice message 2 has been pressed (step S603). When it is determined that the green button has been pressed (step S603: YES), the state determination unit 57 determines that the owner of the determination target terminal 2 is not a rescue target (step S604).

  On the other hand, when it is determined that the green button has not been pressed (step S603—NO), the terminal control unit 56 transmits terminal instruction information for causing the terminal 2 to be determined to output the voice message 3 (step S603). S605). The speaker 23 outputs the voice message 3. The terminal 2 acquires device information of the switch 25 and transmits a beacon signal. The state determination unit 57 of the server 5 acquires device information from the terminal information and determines whether or not the red button indicated by the voice message 3 has been pressed (step S606). When it is determined that the red button has been pressed (step S606-YES), the state determination unit 57 determines that the owner of the terminal 2 to be determined is a rescue target (step S607). If it is determined that the owner of the determination target terminal 2 is a rescue target, the terminal control unit 56 transmits terminal instruction information for causing the determination target terminal 2 to output the voice message 5 (step S608).

  On the other hand, if it is determined in step S606 that the red button has not been pressed (step S606-NO), the terminal control unit 56 provides terminal instruction information for causing the determination target terminal 2 to output the voice message 4. Transmit (step S609). The speaker 23 outputs the voice message 4. The terminal 2 acquires device information of the vibration sensor 26 and transmits a beacon signal. The state determination unit 57 of the server 5 acquires device information from the terminal information, and determines whether or not the vibration sensor 26 has detected vibration by an operation in response to an instruction of the voice message 4 (step S610). When it is determined that the vibration sensor 26 has detected vibration (step S610—YES), the state determination unit 57 determines whether the temperature indicated by the temperature information of the terminal 2 is higher than a predetermined temperature (step S611). ). When it is determined that the temperature indicated by the temperature information is higher than the predetermined temperature (YES in step S611), the state determination unit 57 proceeds to step S607 and determines that the owner of the determination target terminal 2 is a rescue target. To do. This is because, even when the vibration sensor 26 detects vibration, it is difficult to determine whether the vibration is due to human operation. For example, in a situation where the terminal 2 is floating in the sea, the vibration sensor 26 detects vibration due to the movement of waves even if no operation is performed by a person. Therefore, in this embodiment, in addition to the vibration detection of the vibration sensor 26, the necessity of rescue is determined based on the temperature information. Note that the temperature information of the terminal 2 is acquired from a state notification included in the terminal information. When the terminal 2 includes a temperature sensor as various devices, the temperature information may be acquired as device information of the temperature sensor.

  On the other hand, when it is determined in step S610 that the vibration sensor 26 has not detected vibration (step S610-NO), or in step S611, it is determined that the temperature indicated by the temperature information is equal to or lower than a predetermined temperature. In the case (step S611-NO), the state determination unit 57 determines that it is impossible to determine whether or not the owner of the terminal 2 to be determined needs to be rescued (step S612).

FIG. 18 is a diagram illustrating a determination example in the terminal state determination process.
In FIG. 18, “switch pressed” indicates whether or not the switch 25 is pressed on the terminal 2. “Vibration” indicates the presence or absence of vibration detection by the vibration sensor 26 in the terminal 2. “Temperature” represents whether or not the temperature indicated by the temperature information is higher than a predetermined temperature. For example, in the situation where “No” is 1, the owner of the terminal 2 can move the terminal from the information of “switch pressed”, “vibration”, and “temperature”, but the switch cannot be pushed. Is assumed. The example of FIG. 18 represents that the owner of the terminal 2 in such a situation is a rescue object with a priority “high” and the search priority is determined to be “high”. The illustrated determination method is an example, and a determination method different from that in FIG. 18 may be determined according to the situation of the terminal 2 or the assumed situation.

FIG. 19 is a flowchart showing the flow of the position specifying process.
In the position specifying process, the passive tag reader 32 of the base station 3 operates while being disconnected from the base station 3 main body. A person who performs a rescue operation (hereinafter referred to as “rescuer”) moves the position of the passive tag reader 32 and searches for the terminal 2 that transmits the passive tag signal. First, the state determination unit 57 of the server 5 outputs the terminal ID included in the terminal information of the terminal 2 determined as a rescue target (hereinafter referred to as “target terminal”) to the position specifying unit 58. The position specifying unit 58 refers to the terminal information table 541 and selects a terminal information record having the terminal ID of the target terminal. The position specifying unit 58 acquires the value of the passive tag ID from the selected terminal information record (step S701). The position specifying unit 58 transmits a passive tag ID notification that notifies the value of the acquired passive tag ID to the passive tag reader 32 of the base station 3 (step S702).

  The passive tag reader 32 acquires the passive tag ID of the target terminal from the passive tag ID notification. The passive tag reader 32 determines whether or not passive tag signals have been received from the plurality of terminals 2 located within the communication range (step S703). When the passive tag signal is not received (step S703-NO), the passive tag reader 32 repeats the process of step S703 and waits for the passive tag signal to be received. At this time, the rescuer moves the passive tag reader 32 and searches for the terminal 2 that transmits the passive tag signal. On the other hand, when a passive tag signal is received (step S <b> 703 -YES), the passive tag reader 32 transmits the received passive tag signal to the server 5. The position specifying unit 58 acquires the passive tag ID from the passive tag signal received from the passive tag reader 32 (step S704). The position specifying unit 58 determines whether or not the passive tag ID acquired from the passive tag signal is the passive tag ID of the target terminal (step S705).

  When the passive tag ID acquired from the passive tag signal is not the passive tag ID of the target terminal (step S705-NO), the position specifying unit 58 returns to step S703 and waits for the reception of the next passive tag signal. On the other hand, when the passive tag ID acquired from the passive tag signal is the passive tag ID of the target terminal (step S <b> 705-YES), the position specifying unit 58 positions the target terminal in the vicinity of the passive tag reader 32. Then, the terminal control unit 56 generates terminal instruction information for causing the speaker 23 of the target terminal to output a buzzer sound in order to grasp the detailed position of the target terminal. The server 5 transmits the generated terminal instruction information to the base station 3 (step S706).

  In the location system 1 of the embodiment configured as described above, the terminal 2 communicates with the base station 3 using a passive tag. Since the communication by the passive tag is performed within a range of several meters, the position of the terminal 2 can be specified near the position of the base station 3 when the base station 3 receives the passive tag signal. The terminal 2 communicates with the base station 3 using an active tag. Since communication using the active tag is performed within a range of several tens of meters, the presence of the terminal 2 in the communication range of the active tag can be detected when the base station 3 communicates with the active tag of the terminal 2. Therefore, the position specifying system 1 of the embodiment can specify the position of the terminal 2 more accurately.

<Modification>
The server 5 may perform terminal state determination processing based on past terminal information.
20 and 21 are flowcharts illustrating the flow of the terminal state determination process according to the modification.
20 and 21, processes similar to those in FIG. 16 are denoted by the same reference numerals as those in FIG.
When it is determined in step S610 that the vibration sensor 26 has not detected vibration (step S610-NO), or when it is determined in step S611 that the temperature indicated by the temperature information is equal to or lower than a predetermined temperature. (Step S <b> 611 -NO), the state determination unit 57 acquires, from the stored information storage unit 55, terminal information stored for a determination target terminal 2 from the current time to a past time that is back by a predetermined time. The state determination unit 57 acquires device information of the vibration sensor 26 from the past terminal information (step S801). The state determination unit 57 determines whether or not the vibration sensor 26 has detected vibration between the current time and a past time that is back by a predetermined time (step S802). If it is determined that the vibration sensor 26 has detected vibration between the current time and a past time that is a predetermined time backward (YES in step S802), the process proceeds to step S607, and the state determination unit 57 determines the determination target. The owner of the terminal 2 is determined as a rescue target. On the other hand, if it is determined that the vibration sensor 26 has not detected vibration between the current time and a past time that is a predetermined time (step S802-NO), the process proceeds to step S604, where the state determination unit 57 The owner of the terminal 2 to be determined is determined not to be rescued.

FIG. 22 is a diagram illustrating a determination example in the terminal state determination process according to the modification.
In FIG. 22, “past vibration” represents the presence or absence of past vibration detection by the vibration sensor 26 of the terminal 2. For example, in a situation where “No” is 3, from the information of “switch pressed”, “vibration”, “temperature”, and “past vibration”, the owner of the terminal 2 cannot be moved while holding the terminal. It is assumed that this situation has occurred. The example of FIG. 22 represents that the owner of the terminal 2 in such a situation is determined to be a rescue object with the priority “medium” and the search priority is determined to be “high”.

  Various devices included in the terminal 2 are not limited to the speaker 23, the LED 24, the switch 25, and the vibration sensor 26. The terminal 2 may be configured to include other devices and actuators according to the mode of information transmitted to the owner and information necessary for the terminal state determination process.

  Similar to active tag communication, if there is a means for detecting the presence of the terminal 2 located in the vicinity of the base station 3, the communication by the active tag between the terminal 2 and the base station 3 is replaced with another communication means. May be.

  Various devices included in the terminal 2 may be provided with a dedicated power source. The various devices of the terminal 2 may be configured such that the power supply is stopped in a normal time and the power supply is performed in an emergency.

  The passive tag reader 32 may be configured to transmit only the passive tag signal of the terminal 2 determined as the rescue target to the server 5. In this case, the passive tag reader 32 identifies the terminal 2 determined as the rescue target by the passive tag ID notification transmitted from the server 5.

  The position specifying system 1 and the terminal 2 in the above-described embodiment may be realized by a computer. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory inside a computer system serving as a server or a client in that case may be included and a program held for a certain period of time. Further, the program may be a program for realizing a part of the above-described functions, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. You may implement | achieve using programmable logic devices, such as FPGA (Field Programmable Gate Array).

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Location identification system, 2, 2-1 to 2-n ... Terminal, 21 ... Active tag, 211 ... Transmission part, 212 ... Reception part, 213 ... Device control part, 214 ... Mode management part, 215 ... Beacon signal generation Unit, 216 ... timing control unit, 22 ... passive tag, 23 ... speaker, 24 ... LED (Light Emitting Diode), 25 ... switch, 26 ... vibration sensor, 3 ... base station, 31 ... active tag reader, 311 ... transmission unit, 312: Reception unit, 313: Server communication unit, 314 ... Mode information storage unit, 3141 ... Operation mode management table, 315 ... Transmission signal generation unit, 316 ... Mode information management unit, 317 ... Timing control unit, 32 ... Passive tag reader, 4 ... Network, 5 ... Server, 51 ... Communication part, 52 ... Display part, 53 ... External Status acquisition unit, 54 ... terminal information storage unit, 541 ... terminal information table, 55 ... storage information storing unit, 551 ... storage information table, 56 ... terminal control section, 57 ... state determination unit, 58 ... position specifying unit

Claims (12)

Locating a terminal that communicates with a terminal including an active tag that operates with power supplied from its own power source and communicates with an active tag reader and a passive tag that operates with power supplied from a passive tag reader and communicates with a passive tag reader A system,
An active tag reader that receives terminal information representing information about the terminal from the active tag;
A passive tag reader for receiving a passive tag signal from the passive tag;
A position specifying unit for specifying the position of the terminal based on the terminal information or the passive tag signal;
A positioning system comprising: The terminal information is sensor information acquired by a sensor of the terminal, or information including input information representing an operation input to the terminal,
A determination unit that determines whether or not the owner of the terminal needs rescue based on the sensor information or the input information;
The location system according to claim 1. A storage unit for storing the acquired terminal information;
The determination unit determines whether or not rescue is necessary based on the sensor information or the input information and terminal information accumulated in the storage unit.
The location system according to claim 2. In order to obtain information necessary for determining whether or not rescue is necessary from the terminal, the terminal further includes a control unit that causes the terminal to perform a predetermined operation.
The position specifying system according to claim 2 or 3. The sensor information is information related to vibration of the terminal,
The input information is information related to button operations on the terminal,
The control unit causes the terminal owner to output a voice message prompting the terminal owner to operate the terminal,
The determination unit determines whether or not rescue is necessary for the owner of the terminal based on the sensor information or the input information acquired according to the output of the voice message.
The location system according to claim 4. The terminal information is information including identification information of the terminal,
The passive tag signal is a signal including identification information of a passive tag that has transmitted the passive tag signal,
When the identification information acquired from the passive tag signal matches the identification information of a terminal determined to be a rescue target, the position specifying unit determines that the position of the terminal determined to be a rescue target is specified To
The position specifying system according to any one of claims 2 to 5. The passive tag reader outputs identification information included in a passive tag signal acquired from a terminal determined to be a rescue target to the determination unit.
The position specifying system according to any one of claims 2 to 6. The control unit controls a timing at which the active tag performs reception processing by changing an operation mode of the terminal.
The position specifying system according to any one of claims 4 to 7. A display unit for displaying that the position of the terminal of the rescuer is specified;
The position specifying system according to any one of claims 2 to 8. An active tag reader communicating with the active tag;
A passive tag reader communicating with the passive tag;
Terminal information representing information about the terminal including the active tag and the passive tag, or a terminal that communicates with a position specifying system that specifies the position of the terminal based on a passive tag signal transmitted from the terminal,
An active tag that operates with power supplied from the power supply of its own device and transmits the terminal information to the active tag reader;
A passive tag that operates with power supplied from the passive tag reader and transmits the passive tag signal to the passive tag reader;
A terminal equipped with. A first mode in which the active tag receives information transmitted from the location system at a timing of transmitting the terminal information; a second mode in which information transmitted from the location system is always received; Works in any of the modes,
The terminal according to claim 10. The active tag performs acquisition and transmission of the terminal information in a first cycle in the first mode, in a second cycle shorter than the first cycle in the second mode, and In the second mode, the terminal information is acquired and transmitted even at the timing when an instruction is received from the position specifying system.
The terminal according to claim 11.

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