JP2005245833A - Method for collecting sensor information, mobile terminal, infrastructure sensor device, center station, user terminal, and method for operating them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To constantly obtain the state information of a user, to obtain the state information of surrounding environment, and to reduce the power consumption of a sensor appliance. <P>SOLUTION: A mobile terminal 4 is carried by the user and obtains mobile sensor information(the state information on the user) from a mobile sensor device 3. The infrastructure sensor device 1 is a fixed station, obtains sensor information (the state information on the surrounding environment) from the sensor, and enciphers the mobile sensor information, the sensor information, the time stamp of itself, etc. with a public key to transmit to a center station 10. The center station 10 accumulates the encripted sensor information. The mobile terminal 4 stops or reduces power supply to its radio transmission part when it does not transmit signals. A user terminal 5 separately accesses the center station 10 to obtain the enciphered sensor information, and converts the time stamp to an actual time to correlate the mobile sensor information and the sensor information. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention particularly relates to a sensor information collection method for constantly acquiring sensor data, a mobile terminal, an infrastructure sensor device, a center station, a user terminal, and an operation method thereof.

  In recent years, portable medical sensors such as a body temperature sensor and a blood pressure sensor have been developed for health maintenance / management. Thereby, since the state of the body can be constantly monitored, it can be used for medical diagnosis and emergency notification.

For example, as a conventional technique, the function model and current state information created for a medical treatment subject who constantly monitors state information of a medical treatment subject who has a reduced physical ability or has a disease, for example, an elderly person staying at home, etc. , Analyze and judge the situation, send a physical condition report or assistance request to an external medical institution, and transmit the diagnosis contents to the above-mentioned medical care subject side according to the diagnosis result of the doctor for medical assistance. A telemedicine system that can be used has been proposed (see, for example, Patent Document 1). The telemedicine system simplifies the user interface at the time of diagnosis request and emergency call.
JP 2000-102514 A

  However, in the prior art described above, the resident and the building are premised on a fixed correspondence, and there is a problem that, for example, when the resident goes out, the status information of the resident cannot be acquired. In the above-described prior art, the power consumption of various sensors is not mentioned.

  The present invention has been made in consideration of such circumstances, and the purpose of the present invention is to provide sensor information that can always acquire user status information and can also acquire ambient environment status information. A collection method, a mobile terminal, an infrastructure sensor device, a center station, a user terminal, and an operation method thereof. In addition, the present invention has been made in consideration of such circumstances, and an object thereof is to provide a mobile terminal capable of reducing power consumption of a sensor device.

  The present invention has been made to solve the above problems, and the present invention is a sensor information collecting method for collecting sensor information indicating a user's biological state, wherein the mobile sensor information carried by the user is carried by the mobile terminal. Is periodically acquired and recorded together with the time stamp of the mobile terminal, sensor information indicating the state of the surrounding environment is periodically acquired by a fixed sensor device installed at a predetermined location, and the mobile sensor information of the mobile terminal Generating a sensor information signal including sensor information of the fixed sensor device and a time stamp indicating a reception time at the fixed sensor device, and collecting the sensor information signal by a center station for each user ID unique to the user It is characterized by recording.

  According to a second aspect of the present invention, in the sensor information collecting method according to the first aspect, the sensor information corresponding to the user ID recorded in the center station with respect to the terminal presenting the user ID. A signal is transmitted.

  According to a third aspect of the present invention, in the sensor information collecting method according to the first aspect, the sensor information signal is encrypted by a public key corresponding to the user ID by the fixed sensor device. To do.

  Further, the present invention was made to solve the above-described problem, and the present invention is an operation method of a mobile terminal that is carried by a user and periodically acquires movement sensor information indicating the biological state of the user, The movement sensor information acquired periodically is recorded together with a time stamp indicating an acquisition time, and a usage request signal including the movement sensor information, a user ID unique to the user, and a public key corresponding to the user ID is predetermined. It transmits to the fixed sensor apparatus installed in the place of.

  Further, the present invention according to claim 5 is the operation method of the mobile terminal according to claim 4, wherein the mobile sensor information and the user ID are received by the public key and encrypted sensor information is received. The encrypted sensor information is decrypted with a secret key corresponding to a public key, and the mobile sensor information and the user ID are acquired.

  Further, the present invention according to claim 6 is characterized in that, in the operation method of the mobile terminal according to claim 4 or 5, when the use request signal is not transmitted, the power of the wireless transmission means is stopped or reduced. To do.

  Further, the present invention has been made to solve the above-described problems, and the present invention is an operation method of a fixed sensor device that is installed in a predetermined place and periodically acquires sensor information indicating state information of the surrounding environment. The mobile sensor information indicating the biological state of the user recorded by the mobile terminal, periodically transmitted from the mobile terminal carried by the user, the user ID unique to the user, and the public ID corresponding to the user ID. A usage request signal including a relation key is received, a sensor information signal including the mobile sensor information, the sensor information, the user ID, and a time stamp at the time of reception is generated, and the sensor information signal is transmitted to the center station. It is characterized by transmitting.

  According to an eighth aspect of the present invention, in the operation method of the fixed sensor device according to the seventh aspect, the sensor information signal is encrypted with a public key included in the use request signal.

  In addition, the present invention has been made to solve the above-described problems, and the present invention is a user periodically acquired by a mobile terminal carried by a user, which is transmitted from a fixed sensor device installed in a predetermined place. A sensor information signal including movement sensor information indicating the biological information of the user, a user ID unique to the user, and sensor information indicating state information of the surrounding environment periodically acquired by the fixed sensor device, and the received sensor An information signal is stored.

  Further, the present invention according to claim 10 is the operation method of the center station according to claim 9, wherein a sensor information signal corresponding to the recorded user ID is transmitted to the terminal presenting the user ID. It is characterized by doing.

  Further, the present invention according to claim 11 is the operation method of the center station according to claim 10, wherein a position attribute indicating a fixed location of the fixed sensor device is held for each fixed sensor device ID unique to the fixed sensor device. Then, a position attribute corresponding to the fixed sensor device ID is transmitted to a terminal that presents the fixed sensor device ID.

  According to a twelfth aspect of the present invention, in the operation method of the center station according to the tenth aspect, for each fixed sensor device ID, a difference between a timer stamp of the fixed sensor device and an actual time is calculated and held. The difference between the timer stamp of the fixed sensor device and the actual time is transmitted to the terminal presenting the user ID.

  In addition, the present invention has been made to solve the above-described problems, and the present invention provides sensor information indicating state information of the surrounding environment periodically acquired by a fixed sensor device installed at a predetermined place, and a user. The sensor information signal is received by accessing the center station that stores the sensor information signal including the mobile sensor information indicating the user's biological information periodically acquired by the mobile terminal carried by the mobile terminal and the user ID unique to the user. The sensor information signal is transmitted to a mobile terminal corresponding to the user ID.

  According to a fourteenth aspect of the present invention, in the operation method for a user terminal according to the thirteenth aspect, a position attribute indicating a fixed location of the fixed sensor device corresponding to a specific fixed sensor device ID of the fixed sensor device is provided. It is acquired from a center station, and the position attribute is included in the sensor information signal and is transmitted as a user sensor information signal to a mobile terminal corresponding to the user ID.

As described above, according to the present invention, the movement sensor information is periodically acquired by the mobile terminal carried by the user, recorded together with the time stamp of the mobile terminal, and the fixed sensor device installed at a predetermined location. Sensor information that periodically indicates sensor information indicating the state of the surrounding environment, and includes sensor information including the mobile sensor information of the mobile terminal, sensor information of the fixed sensor device, and a time stamp indicating a reception time at the fixed sensor device. A signal is generated, and the sensor information signal is collected by the center station and recorded for each user ID unique to the user.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

According to the present invention, a sensor information signal corresponding to the user ID recorded in the center station is transmitted to the terminal presenting the user ID.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

According to the present invention, the sensor information signal is encrypted by the fixed sensor device using a public key corresponding to the user ID.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

In addition, according to the present invention, there is provided a method for operating a mobile terminal that is carried by a user and periodically acquires movement sensor information indicating the biological state of the user, wherein the periodically acquired movement sensor information is acquired at an acquisition time. And a usage request signal including the movement sensor information, a user ID unique to the user, and a public key corresponding to the user ID, is transmitted to a fixed sensor device installed at a predetermined location.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

Further, according to the present invention, the mobile sensor information and the user ID are received with encrypted sensor information encrypted with the public key, and the encrypted sensor information is decrypted with a secret key corresponding to the public key. Then, the movement sensor information and the user ID are acquired.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

According to the present invention, when the use request signal is not transmitted, the power of the wireless transmission means is stopped or reduced.
Therefore, the user's status information can be obtained at all times, the ambient environment status information can be obtained, and the power consumption of the sensor device can be reduced. .

According to the present invention, the movement sensor information indicating the biological state of the user recorded by the mobile terminal, periodically transmitted from the mobile terminal carried by the user, the user ID unique to the user, and the user Receiving a use request signal including a public key corresponding to an ID, generating a sensor information signal including the mobile sensor information, the sensor information, the user ID, and a time stamp at the time of reception; Send the signal to the center station.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

According to the present invention, the sensor information signal is encrypted with a public key included in the use request signal.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

Further, according to the present invention, the movement sensor information indicating the user's biological information periodically acquired by the mobile terminal carried by the user, transmitted from the fixed sensor device installed in a predetermined place, A sensor information signal including a user ID and sensor information indicating ambient environment state information periodically acquired by the fixed sensor device is received, and the received sensor information signal is accumulated.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

According to the present invention, a sensor information signal corresponding to the recorded user ID is transmitted to the terminal presenting the user ID.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

Further, according to the present invention, for each fixed sensor device ID unique to the fixed sensor device, a position attribute indicating a fixed location of the fixed sensor device is held, and for the terminal that presents the fixed sensor device ID, A position attribute corresponding to the fixed sensor device ID is transmitted.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

Further, according to the present invention, for each fixed sensor device ID, the difference between the timer stamp of the fixed sensor device and the real time is calculated and held, and the difference between the timer stamp of the fixed sensor device and the real time is calculated. , To the terminal that presents the user ID.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

In addition, according to the present invention, sensor information indicating the status information of the surrounding environment periodically acquired by a fixed sensor device installed in a predetermined place, and a user periodically acquired by a mobile terminal carried by the user The sensor information signal is received by accessing a center station that stores a sensor information signal including mobile sensor information indicating the biological information of the user and a user ID unique to the user, and the sensor information is transmitted to the mobile terminal corresponding to the user ID Send a signal.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

According to the present invention, a position attribute indicating a fixed location of the fixed sensor device corresponding to a unique fixed sensor device ID of the fixed sensor device is acquired from a center station, and the position attribute is added to the sensor information signal. The user sensor information signal is transmitted to the mobile terminal corresponding to the user ID.
Therefore, it is possible to obtain the user's state information at all times and obtain the surrounding environment state information.

  Hereinafter, the best mode for carrying out the present invention will be described.

A. Configuration of Embodiment FIG. 1 is a block diagram showing a configuration of a sensor network according to an embodiment of the present invention. In the figure, an infrastructure sensor device 1 (fixed sensor device) is a fixed station and includes a temperature sensor, a humidity sensor, a brightness sensor, etc. installed in a building room, and sensor information from these sensors (state of the surrounding environment) Information). The infrastructure sensor device 1 is connected to a network (Internet, satellite network, mobile phone network, etc.) 2 and can communicate with the center station via the network 2. The infrastructure sensor device 1 also has a wireless communication function for transmitting and receiving data to and from mobile terminals wirelessly.

The infrastructure sensor device 1 includes a unique infrastructure sensor device ID. The infrastructure sensor device 1 transmits an encrypted sensor information signal to the center station 10 every sensor information collection cycle Tr. The encrypted sensor information signal includes a predetermined number (0 to n integer values) of encrypted sensor information. When the usage request signal is received from the mobile terminal, the encrypted sensor information is the user's public key and the mobile sensor information. , The sensor information, the user ID, and the time stamp by the timer held by the infrastructure sensor device 1 (referred to as the time stamp of the infrastructure sensor device) are encrypted and generated. The encrypted sensor information signal generated with the same user ID is transmitted to the center station 10 at most once within the sensor information collection period Tr.
When the use request signal is not received from the same user ID within the sensor information collection cycle Tr, the sensor information and the encrypted sensor information signal generated by encrypting the time stamp of the infrastructure sensor device are sent to the center station 10. Send.

  Next, the movement sensor device 3 is carried by a user together with the mobile terminal 4 described later, and includes an acceleration sensor, a blood pressure sensor, a body temperature sensor, and the like as sensors for detecting the states of various users. The movement sensor device 3 periodically supplies movement sensor information (user status information) to the mobile terminal 4.

  The mobile terminal 4 is provided with an interface (not shown) that is carried by the user and can communicate with the mobile sensor device 3, acquires mobile sensor information from the mobile sensor device 3, and sends a use request signal to the center station 10. When transmitting, the movement sensor information is stored together with a time stamp. The mobile terminal 4 holds a unique user ID, a user public key corresponding to the user ID, and a user secret key (decryption key) in order to perform mutual authentication. Information encrypted with the user public key can be decrypted with the user private key. The user ID and user public key may be made public. In order to enhance safety, an electronic certificate authority may be separately installed, and the user ID and the signature of the electronic certificate authority for the public key may be included in the use request signal.

  In addition, the mobile terminal 4 includes a wireless transmission unit (not shown) for wirelessly transmitting and receiving data to and from the infrastructure sensor device 1, and when not transmitting a signal (use request signal), the wireless transmission is performed. Power consumption control is performed to stop or reduce the power supply of the unit.

  The user terminal 5 accesses the center station 10 via the network 2, the mobile sensor information collected via the infrastructure sensor device 1, the sensor information, the location attribute corresponding to the infrastructure sensor device ID, the time of the infrastructure sensor device 1. Acquisition of stamps and position attributes and generation of user sensor information including them are performed. Further, the user terminal 5 has a network connection function (USB, IEEE 1394, etc.) for connecting to the mobile terminal 4, and transmits the user sensor information to the mobile terminal 4.

  The center station 10 holds the position attribute of the infrastructure sensor device 1 in the center station database 13 for each device ID. As the position attribute, information such as an address, a building name, a room number, and a remark is held. The center station 10 accumulates the user ID for identifying the user and the encrypted sensor information collected via the infrastructure sensor device 1 in the center station database 13 for each user ID. Holds the difference between timestamp and real time. The difference between the time stamp and the actual time is obtained by periodically measuring the difference between the timer means provided in the center station 10 and the time stamp included in the received sensor information signal.

  Further, the center station 10 extracts the encrypted sensor information corresponding to the user ID and the location attribute corresponding to the infrastructure sensor device ID from the center station database 13 and transmits them to the user terminal 5 for the access from the user terminal 5. To do.

  In the present embodiment, the infrastructure sensor device 1 is activated by the mobile terminal 4 of each user, and after the infrastructure sensor device 1 acquires sensor information, the network sensor (Internet, satellite network, or mobile phone network) 2 is used. Is transmitted to the center station 10 and the center station 10 accumulates the sensor information. Each user accesses the center station 10 separately through the network 2 after acquiring sensor information and acquires sensor information.

B. Operation of Embodiment Next, the operation of the above-described embodiment will be described. FIG. 2 is a sequence diagram for explaining the operation (sensor information collection processing) of the present embodiment. FIG. 3 is a sequence diagram for explaining the operation of the present embodiment (sensor information acquisition process). FIG. 4 is a conceptual diagram showing the format of various signals of this embodiment.

B-1. Sensor information collection process The mobile terminal 4 performs transmission interval Ts (Ts is a random non-negative integer, and Ts_min <Ts <Ts_max, where Ts_min and Ts_max indicate a lower limit value and an upper limit value of the transmission interval Ts, respectively). The mobile sensor information periodically collected by the mobile sensor device 3 is held together with the time stamp of itself (mobile terminal 4) (Sa1), and a use request signal (see the format of FIG. 4) is transmitted to the infrastructure sensor device 1. (Sa2). The use request signal includes a user ID and a different public key for each user ID. When the mobile terminal 4 does not transmit the use request signal, the mobile terminal 4 performs power consumption control for stopping or reducing the power supply of the wireless transmission unit.

The infrastructure sensor device 1 generates sensor information from the outputs of various sensors, and transmits a sensor request signal to the center station 10 as a sensor information signal when a use request signal is not received within the sensor information collection cycle Tr from the same user ID. The encrypted sensor information signal is transmitted to the center station 10 every sensor information collection cycle Tr.
That is, when the infrastructure sensor device 1 receives the use request signal from the mobile terminal 4, the sensor information, the user ID, and the time stamp of the infrastructure sensor device 1 are encrypted with the user's public key to generate encrypted sensor information. (Sa3). Thereafter, the encrypted sensor information signal is transmitted to the center station 10 (Sa4). However, the encrypted sensor information signal generated with the same user ID is transmitted to the center station 10 at most once within the sensor information collection period Tr. The sensor information signal includes encrypted sensor information obtained by encrypting the user ID, the sensor information of the infrastructure sensor device 1 and the time stamp of the infrastructure sensor device 1 with the public key included in the user request signal, and the user ID and the infrastructure. The sensor device ID and the time stamp of the infrastructure sensor device are included.

  The center station 10 extracts the encrypted sensor information extracted from the sensor information signal, the user ID, the infrastructure sensor device ID, and the time stamp of the infrastructure sensor device 1, and stores the encrypted sensor information in the center station database 13 for each user ID. And the difference between the time stamp of the infrastructure sensor device 1 and the actual time is calculated and stored in the center station database 13 for each ID (Sa5).

B-2. Sensor Information Acquisition Processing Next, the user connects to the center station 10 by the user terminal 5 that can be connected to the network 2 in order to acquire the sensor information collected via the infrastructure sensor device 1 (Sb1). For access to the center station 10, authentication based on the user ID and password (CHAP authentication: Challenge-Handshake Authentication Protocol 1) is performed to prevent impersonation. Other authentication means and encryption means may be used.

  After connecting to the center station 10, the user terminal 5 transmits a sensor information request signal to the center station 10 (Sb2). The sensor information request signal includes a user ID (see the format of FIG. 4).

  When the center station 10 receives the sensor information request signal and acquires the user ID, the center station 10 extracts the encrypted sensor information corresponding to the user ID from the center station database 13 (Sb3), generates a sensor information request response signal, and generates a user terminal. 5 (Sb4). The sensor information request response signal includes an encrypted sensor information string and a user ID (see the format of FIG. 4).

  The user terminal 5 receives the sensor information request response signal and decrypts it using the decryption key held by itself (Sb5). Next, the user terminal 5 transmits a location attribute request signal (see the format of FIG. 6) including the user ID and the infrastructure sensor device ID acquired from the decrypted sensor information request response signal to the center station 10 (Sb6). ).

  When the center station 10 receives the position attribute request signal, the center station 10 acquires the position attribute corresponding to the infrastructure sensor device ID from the center station database 13 and encrypts it with the user's public key to generate an encrypted position attribute (Sb7). . Then, a position attribute request response signal (see the format of FIG. 4) including the encrypted position attribute is transmitted to the user terminal 5 (Sb8).

  Upon receiving the position attribute request response signal from the center station 10, the user terminal 5 decrypts the encrypted position attribute with the decryption key held by itself, acquires the position attribute, and obtains the sensor information, the infrastructure sensor device ID, and the actual time. A user sensor information signal (see the format of FIG. 4) is generated (Sb9). Thereafter, the user terminal 5 and the mobile terminal 4 are connected to a network (USB, IEEE 1394, etc.), and a user sensor information signal is transmitted from the user terminal 5 to the mobile terminal 4 (Sb10). The user sensor information signal includes user sensor information, and the user sensor information includes sensor information, an infrastructure sensor device ID, and a time stamp (see the format of FIG. 4).

  When receiving the user sensor information signal, the mobile terminal 4 acquires the user sensor information included therein, and stores the mobile sensor information and the user sensor information (Sb10).

  Further, the mobile terminal 4 correlates the mobile sensor information collected by the mobile sensor device 3 with the sensor information collected by the infrastructure sensor device 1 by converting the time stamp generated by the mobile terminal 4 into real time. be able to. For example, it becomes possible to know the room temperature when the body temperature fluctuates.

  According to the embodiment described above, the mobile terminal 4 can be realized only at the transmission function and at a low cost. In addition, the mobile terminal 4 can reduce power consumption by controlling power consumption, and can extend the battery life. In addition, by randomly changing the transmission cycle Ts of the usage request signal, it is possible to avoid collision of signals from a large number of mobile terminals. Further, the sensor information signal including the infrastructure sensor device ID enables the center station 10 to convert the infrastructure sensor device ID into the installation location, and processing associated with the user's position is possible.

  Further, according to the above-described embodiment, since the sensor information signal including the time stamp indicating the current time is received, there is no need for the infrastructure sensor device 1 to receive the use request signal and immediately transmit the sensor information signal. It is possible to send them together and to manage time information with high accuracy. Further, since the sensor information signal is encrypted and communicated over the network, the security of the sensor information can be improved.

  Further, according to the above-described embodiment, since the infrastructure sensor device 1 does not have an encryption key, the infrastructure sensor device 1 can be simplified, and countermeasures against theft of the encryption key are not required. In addition, different public keys can be used for each user, and the user can select a security level. In this case, even if a decryption key of a certain user is stolen, it does not affect other users.

  In addition, according to embodiment mentioned above, although the user terminal 5 and the mobile terminal 4 differed, the same terminal may be sufficient. In this case, the mobile terminal 4 has an interface (USB, Ethernet (registered trademark), IEEE 1394, etc.) for bidirectional communication (connection) to the center station 10 and needs to perform IP communication.

  Note that, according to the above-described embodiment, the time stamp and the actual time do not necessarily match, but can also match. For example, if they are matched using a network time protocol (NTP) or the like, conversion to actual time at the center station 10 or the mobile terminal 4 becomes unnecessary. Further, the present invention is applicable not only to medical sensors, but also to acquisition of state information of moving machines.

  In the above-described embodiment, the infrastructure sensor device 1, the mobile sensor device 3, the mobile terminal 4, the center station 10, and the like are executed in a computer system. A series of processes performed by the infrastructure sensor device 1, the mobile sensor device 3, the mobile terminal 4, and the center station 10 described above are stored in a computer-readable recording medium in the form of a program. The above processing is performed by reading and executing. That is, each processing means and processing unit in the control unit 1, the image processing unit 5 and the calculation unit 6 is a central processing unit such as a CPU that reads the above program into a main storage device such as a ROM or RAM, and processes information. It is realized by executing arithmetic processing.

  Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

It is a block diagram which shows the structure of the sensor network by embodiment of this invention. It is a sequence diagram for demonstrating the operation | movement (collection process of sensor information) of this embodiment. It is a sequence diagram for demonstrating the operation | movement (acquisition process of sensor information) of this embodiment. It is a conceptual diagram which shows the format of the various signals of this embodiment.

Explanation of symbols

1 ... Infrastructure sensor device (fixed sensor device)
2 ... Network 3 ... Mobile sensor device 4 ... Mobile terminal 5 ... User terminal 10 ... Center station 13 ... Center station database

Claims (14)

A sensor information collection method for collecting sensor information indicating a user's biological state,
Mobile sensor information is periodically acquired by the mobile terminal carried by the user, recorded with the time stamp of the mobile terminal,
Sensor information indicating the state of the surrounding environment is periodically acquired by a fixed sensor device installed at a predetermined location,
Generating a sensor information signal including movement sensor information of the mobile terminal, sensor information of the fixed sensor device, and a time stamp indicating a reception time at the fixed sensor device;
A sensor information collecting method, wherein the sensor information signal is collected by a center station and recorded for each user ID unique to the user. The sensor information collecting method according to claim 1, wherein a sensor information signal corresponding to the user ID recorded in the center station is transmitted to the terminal presenting the user ID. The sensor information collecting method according to claim 1, wherein the sensor information signal is encrypted by a public key corresponding to the user ID by the fixed sensor device. An operation method of a mobile terminal that is carried by a user and periodically acquires movement sensor information indicating the biological state of the user,
The movement sensor information acquired periodically is recorded together with a time stamp indicating an acquisition time, and a usage request signal including the movement sensor information, a user ID unique to the user, and a public key corresponding to the user ID is predetermined. A method for operating a mobile terminal, comprising: transmitting to a fixed sensor device installed at a location. The mobile sensor information and the user ID receive encrypted sensor information encrypted with the public key, decrypt the encrypted sensor information with a secret key corresponding to the public key, and the mobile sensor information and the The method of operating a mobile terminal according to claim 4, wherein a user ID is acquired. The method of operating a mobile terminal according to claim 4 or 5, wherein when the use request signal is not transmitted, the power of the wireless transmission means is stopped or reduced. An operation method of a fixed sensor device that is installed at a predetermined place and periodically acquires sensor information indicating state information of the surrounding environment,
The movement sensor information indicating the biological state of the user recorded by the mobile terminal, periodically transmitted from the mobile terminal carried by the user, the user ID unique to the user, and the public key corresponding to the user ID Including a usage request signal,
Generating a sensor information signal including the movement sensor information, the sensor information, the user ID, and a time stamp at the time of reception;
A method of operating a fixed sensor device, wherein the sensor information signal is transmitted to a center station. 8. The method of operating a fixed sensor device according to claim 7, wherein the sensor information signal is encrypted with a public key included in the use request signal. Mobile sensor information indicating a user's biological information periodically acquired by a mobile terminal carried by the user, transmitted from a fixed sensor device installed in a predetermined location, a user ID unique to the user, and the fixed sensor device Sensor information signal including sensor information indicating the state information of the surrounding environment periodically acquired by
The operation method of the center station characterized by accumulating the received sensor information signal. 10. The operation method of the center station according to claim 9, wherein a sensor information signal corresponding to the recorded user ID is transmitted to a terminal presenting the user ID. For each fixed sensor device ID unique to the fixed sensor device, hold a position attribute indicating the fixed location of the fixed sensor device,
The operation method of the center station according to claim 10, wherein a position attribute corresponding to the fixed sensor device ID is transmitted to a terminal presenting the fixed sensor device ID. For each fixed sensor device ID, calculate and hold the difference between the timer stamp of the fixed sensor device and the actual time,
The operation method of the center station according to claim 10, wherein the difference between the timer stamp of the fixed sensor device and the actual time is transmitted to a terminal presenting the user ID. Sensor information indicating the status information of the surrounding environment periodically acquired by a fixed sensor device installed in a predetermined place, and movement sensor information indicating the user's biological information periodically acquired by a mobile terminal carried by the user And receiving the sensor information signal by accessing the center station that stores the sensor information signal including the user ID unique to the user,
A method for operating a user terminal, comprising transmitting the sensor information signal to a mobile terminal corresponding to the user ID. A position attribute indicating a fixed location of the fixed sensor device corresponding to a unique fixed sensor device ID of the fixed sensor device is acquired from a center station,
The method of operating a user terminal according to claim 13, wherein the position attribute is included in the sensor information signal and is transmitted to the mobile terminal corresponding to the user ID as a user sensor information signal.

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