JP-7856170-B2 - Management node, communication terminal, and data collection method

Inventors

• 玉置 真也
• 椎名 亮太
• 谷口 友宏

Assignees

• ＮＴＴ株式会社

Dates

Publication Date

20260511

Application Date

20221208

Claims (6)

1. A management node of a data collection system equipped with multiple communication terminals, The aforementioned communication terminal includes a data communication receiving unit that transmits and receives radio waves from each other at arbitrary timings and notifies the measured received strength of the radio waves, An information processing unit that calculates the relative position of the communication terminal from the notified received signal strength, Equipped with , The management node is characterized in that the information processing unit causes the transmission intensity of the radio waves transmitted to the communication terminal to vary and repeatedly calculates the relative position .
2. The management node according to claim 1, characterized in that the data communication receiving unit notifies the received signal strength by receiving a frame in which the received signal strength is stored in the extended area of the Layer 2 communication protocol.
3. The aforementioned information processing unit, The management node according to claim 1, further characterized by acquiring the positional relationship between a sensing terminal that acquires sensing data and the communication terminal, and using the information about the sensing terminal obtained from the positional relationship as metadata, and linking the sensing data and the metadata and storing them in an information storage unit.
4. A communication terminal that communicates with the management node of the data acquisition system, A data communication receiving unit that receives instruction signals from the management node, A beacon signal transmitting unit that transmits radio waves based on the instruction signal, A beacon signal receiving unit that receives radio waves from other communication terminals, A processing unit for measuring the received signal strength of the aforementioned radio waves, A data communication transmission unit that notifies the management node of the received signal strength, Equipped with , The communication terminal is characterized in that the beacon signal transmitting unit varies the transmission intensity of the radio waves transmitted based on the instruction signal .
5. The communication terminal according to claim 4 , characterized in that the data communication transmission unit transmits and notifies by transmitting a frame in which the received strength has been stored in the extended area of the communication protocol of Layer 2.
6. The ability to send and receive radio waves between multiple communication terminals at any given time. A terminal location determination method comprising: notifying a management node of the received signal strength of the radio waves received by the communication terminal; and the management node calculating the relative position of the communication terminal from the notified received signal strength, A terminal position determination method characterized by repeatedly calculating the relative position by varying the transmission intensity of the radio waves transmitted to the communication terminal when calculating the relative position .

Description

This disclosure relates to the collection of sensing data in the Internet of Things (IoT). It is a standardized, lightweight communication protocol that does not require high performance, and is used to acquire network configuration information and device information of terminals and equipment. For example, Non-Patent Document 1 reports a method using LLDP (Link Layer Discovery Protocol, see, for example, Non-Patent Document 3). In IoT, it is necessary to connect numerous sensor terminals to a network and collect the data they generate (sensing data). Furthermore, in data utilization in IoT, the importance of metadata, which is data related to the sensing data, has been reported (Non-Patent Document 2, etc.), in addition to the sensing data itself generated by the sensor terminals. It is expected that by acquiring and distributing sensing data and metadata together, users will be able to utilize the sensing data safely and easily. For example, by using the LLDP disclosed in Non-Patent Document 1, metadata (device information) such as manufacturer name and model number related to sensing data can be collected with an economical system configuration. Yoshiyuki Mihara, Takefumi Yamazaki, Manabu Okamoto, and Atsushi Sato, "Design of the Home Network Map Identification Protocol HTIP and its Application to Diagnostic Tools," Transactions of the Information Processing Society of Japan, Consumer Devices & Systems, Vol. 2, No. 3, pp. 34-45, Dec. 2012.Toshihiko Oda, Hiroshi Imai, Takeshi Naito, and Hajime Takebayashi, "A Method for Defining, Generating, and Utilizing Metadata in the Sensing Data Distribution Market," 2018 Annual Conference of the Japanese Society for Artificial Intelligence (32nd), June 2012.IEEE Std 802.1AB-2016, “IEEE Standard for Local and metropolitan area networks-Station and Media Access Control “Connectivity Discovery”IEEE Std 802.11TM-2016 P. 708 (Probe Request), P.708 (Probe Request). 712 (Probe Response) This is a diagram illustrating the data collection system according to the present invention.This is a diagram illustrating the terminal of the data collection system according to the present invention.This diagram illustrates the management node of the data collection system according to the present invention.This diagram illustrates the frames sent from the terminal to the management node.This is a diagram illustrating the data collection system according to the present invention.This is a diagram illustrating the data collection system according to the present invention.This diagram illustrates the operation of the data collection system according to the present invention.This is a diagram explaining the fingerprinting method.This diagram illustrates the three-point positioning method and the WCL method.This is a diagram illustrating the data collection system according to the present invention.This is a diagram illustrating the data collection system according to the present invention.This diagram illustrates the operation of the data collection system according to the present invention. Embodiments of the present invention will be described with reference to the attached drawings. The embodiments described below are examples of the present invention, and the present invention is not limited to these embodiments. In this specification and in the drawings, components with the same reference numerals refer to the same components. (Embodiment 1) This embodiment describes the basic configuration of the data collection system. Figure 1 is a diagram illustrating the data acquisition system 301 of this embodiment. The data acquisition system 301 is a data acquisition system that performs communication from terminal 11 to network device 12 by utilizing the extended domain of standardized communication protocols (LLDP, HTTP, IEEE 802.11, etc.). Terminal 11 stores the sensing data detected by the sensor device in an area within the frame defined by the communication protocol, different from the area where metadata is stored, and sends it to the network device 12. The network device 12 forwards the frame to the management node 13. The management node 13 is characterized by associating and storing the sensing data and the metadata based on the information identifying the terminal 11 described in the frame. The data collection network 15 is a network that connects sensor terminals 11 located within a specific range to a management node 13. The data collection network 15 can be, for example, a local area network (LAN), a field area network (FAN), or an IoT area network. Within the same data collection network 15, there may be multiple sensor terminals 11 of a single type, or multiple types of sensor terminals. Figure 2 is a diagram illustrating terminal 11. Terminal 11 is, for example, an IoT sensor terminal that performs sensing on an object to be observed and generates sensing data. Terminal 11 includes a sensor device 11a, a sensing data storage processing unit 11b, an equipment information storag