WO2022269906A1 - データを収集するシステム、方法、装置及びプログラム - Google Patents

データを収集するシステム、方法、装置及びプログラム Download PDF

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Publication number
WO2022269906A1
WO2022269906A1 PCT/JP2021/024157 JP2021024157W WO2022269906A1 WO 2022269906 A1 WO2022269906 A1 WO 2022269906A1 JP 2021024157 W JP2021024157 W JP 2021024157W WO 2022269906 A1 WO2022269906 A1 WO 2022269906A1
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WO
WIPO (PCT)
Prior art keywords
terminal
identification information
control system
system frame
information
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PCT/JP2021/024157
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English (en)
French (fr)
Japanese (ja)
Inventor
亮太 椎名
真也 玉置
友宏 谷口
徹也 鈴木
康隆 木村
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日本電信電話株式会社
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Priority to PCT/JP2021/024157 priority Critical patent/WO2022269906A1/ja
Priority to JP2023529410A priority patent/JP7574930B2/ja
Publication of WO2022269906A1 publication Critical patent/WO2022269906A1/ja

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present disclosure relates to communication technology for IoT (Internet of Things).
  • MAC Media Access Control
  • metadata metadata
  • sensor data are combined with a MAC (Media Access Control) address for terminal identification and sent to a host server.
  • MAC Media Access Control
  • Non-Patent Documents 1 and 2 a device information storage processing unit is provided, and for terminal identification MAC address, metadata, and sensor data are transmitted together to a host server, and the terminal, metadata, and sensor data are transmitted. doing the tying.
  • the MAC address is randomized, for example, when the terminal is moved or taken out and the destination base station is changed, it becomes impossible to track the terminal across base stations, making continuous terminal management difficult. .
  • the present disclosure aims to enable tracking of terminals across base stations even when randomization of MAC addresses is performed.
  • This disclosure utilizes a low-layer communication protocol to collect sensor data and metadata while identifying terminals without using true MAC addresses that can uniquely identify terminals.
  • Terminals, base stations, and management servers are coordinated to identify terminals based on pseudo MAC addresses generated by terminals and network connection information between terminals and base stations. Also, depending on the type of metadata to be collected, terminal identification may be performed using only metadata. From these, the source of movement of the terminal can be estimated, and the terminal movement history is created.
  • the system of the present disclosure A system for collecting information to be collected from a terminal to a data collection unit using a standardized wireless communication protocol,
  • the terminal is Holds a history of terminal identification information for identifying its own device, storing at least one piece of terminal identification information held in the history of the terminal identification information and metadata other than the information to be collected in an extension area within a control system frame defined by the wireless communication protocol; transmitting a control system frame to the data collection unit;
  • the data collection unit holding a history of the terminal identification information for each terminal; upon receiving the control system frame, reading the terminal identification information and the metadata from the control system frame;
  • a terminal that identifies a terminal that matches the terminal identification information stored in the control system frame from the history of the terminal identification information that is held, and that identifies the metadata that is stored in the control system frame. to the information to be collected.
  • the methods of the present disclosure include: A method performed by a system that collects information to be collected from a terminal to a data collection unit using a standardized wireless communication protocol,
  • the terminal holds a history of terminal identification information for identifying its own device
  • the data collection unit holds a history of the terminal identification information for each terminal
  • the terminal stores at least one piece of terminal identification information held in the history of the terminal identification information and metadata other than the information to be collected in an extension area within a control system frame defined by the wireless communication protocol.
  • the data collection unit upon receiving the control system frame, reading the terminal identification information and the metadata from the control system frame; A terminal that identifies a terminal that matches the terminal identification information stored in the control system frame from the history of the terminal identification information that is held, and that identifies the metadata that is stored in the control system frame. to the information to be collected.
  • the apparatus of the present disclosure includes: A device that functions as the data collection unit provided in a system that collects information to be collected from a terminal to a data collection unit using a standardized wireless communication protocol, holding a history of terminal identification information for identifying the terminal for each terminal; At least one piece of terminal identification information held in the history of the terminal identification information, and metadata other than the information to be collected, when a control system frame defined by the wireless communication protocol is received, the terminal identification information and reading the metadata from the control system frame; A terminal that identifies a terminal that matches the terminal identification information stored in the control system frame from the history of the terminal identification information that is held, and that identifies the metadata that is stored in the control system frame. to the information to be collected.
  • the program of the present disclosure is a program for realizing a computer as each functional unit provided in the device of the present disclosure, and the computer executes each step of the communication method executed by the device of the present disclosure. It is a program for
  • pseudo MAC addresses and network connection information between terminals and base stations are used to create and manage terminal movement history, thereby randomizing MAC addresses. Also, terminal management across base stations can be realized without protocol modification.
  • FIG. 1 shows a configuration example of a system of the present disclosure
  • 1 shows a configuration example of a system of the present disclosure
  • An example of operation when a terminal connects to a radio base station is shown.
  • 1 shows a configuration example of a system of the present disclosure
  • 1 shows a configuration example of a terminal according to the present disclosure
  • It is an example for explaining an area for storing metadata.
  • FIG. 1 shows an example of the configuration of the data collection system.
  • a terminal 11 is connected to a management server 13 via a communication network 14 .
  • the terminal 11 transmits information to be collected, metadata, and terminal identification information to the management server 13 functioning as a data collection unit.
  • Information to be collected is, for example, sensor data acquired from the sensor 20 .
  • Metadata is data acquired by the terminal 11 and includes arbitrary information other than sensor data.
  • the terminal identification information is any information that can identify the terminal 11, such as a MAC address.
  • Sensor data is transmitted using data frames defined by standardized protocols.
  • a MAC address which is terminal identification information, is stored in the data frame.
  • metadata other than sensor data is transmitted using a control system frame defined by a standardized wireless communication protocol.
  • a MAC address which is terminal identification information, is also stored in the control system frame.
  • the data frames defined by the standardized protocol are, for example, TCP/IP data frames.
  • the control system frame is, for example, a probe request defined by Wi-Fi (IEEE802.11).
  • the probe request is a layer 2 signal and is transmitted and received between the terminal 11 and the radio base stations 12#A and 12#B before TCP/IP data communication for transmitting sensor data is established. Therefore, the management server 13 can obtain the information sent by the probe request before TCP/IP data communication is established. can be used.
  • the management server 13 reads the sensor data and terminal identification information from the data frame, and links the sensor data and terminal identification information.
  • the management server 13 reads the metadata and the terminal identification information from the control system frame, and links the metadata and the terminal identification information.
  • Sensor data and metadata are associated with terminal identification information. This enables the management server 13 to link the metadata and sensor data with the terminal 11 .
  • the terminal 11, the wireless base stations 12#A and 12#B, and the management server 13 are linked, and not only the MAC address transmitted as the terminal identification information from the terminal 11, but also the terminal 11 and the wireless base station 12#A and 12#B, the terminal 11 is identified based on the network connection information and the like. Also, depending on the type of metadata to be collected, the terminal 11 is identified only with the metadata. As a result, it is possible to manage the terminal 11 across the wireless base stations 12#A and 12#B without modifying the protocol even if the MAC address is randomized.
  • Information to be collected can be any information that can be acquired by the terminal 11, such as any device information provided in the terminal 11.
  • the sensor acquired by the sensor 20 An example of data will be described.
  • the terminal 11 is managed using a pseudo MAC address as terminal identification information.
  • Terminal 11 has a pseudo MAC address history table in addition to sensor 20 .
  • the terminal 11 transmits sensor data, metadata, and pseudo MAC addresses to the management server 13 .
  • the radio base station 12#A transmits to the management server 13, as connected terminal information, the number of terminal connections, the connected terminal MAC address (pseudo), connection start time, and connection disconnection time.
  • the management server 13 associates sensor data and metadata with the terminal 11 .
  • the management server 13 manages the pseudo MAC address history table and terminal movement history for each individual terminal 11 .
  • the pseudo MAC address history table manages the terminal 11 by linking the pseudo MAC address history to the terminal identification information.
  • the terminal movement history is updated for each individual terminal 11 .
  • the terminal 11 When the terminal 11 moves to the base station, the terminal 11 transmits part of the pseudo MAC address history table information to the management server 13 in a probe request frame, which is a type of control frame. That is, the terminal 11 does not transmit the true MAC address, but transmits the past pseudo MAC address to the management server 13 . Metadata may be stored in this control system frame, but metadata may not be stored.
  • the wireless base station 12 #B transmits the past pseudo MAC address to the management server 13 as the connected terminal information of the terminal 11 .
  • the management server 13 matches the pseudo MAC address transmitted as the terminal identification information with the connected terminal information, identifies the past wireless base station 12#A and the terminal identification information, and records the terminal movement history for each individual terminal 11. Update. As a result, the terminal 11 can be managed even when the pseudo MAC address is used as the terminal identification information.
  • the terminal 11 is managed using network connection information between the terminal 11 and the radio base station 12 as terminal identification information.
  • the network may be referred to as (NW).
  • the terminal 11 has NW connection information in addition to the sensor 20 .
  • the terminal 11 transmits sensor data, metadata and NW connection information to the management server 13 .
  • the NW connection information is arbitrary information used by the terminal 11 for wireless communication, and includes, for example, at least one of a connection destination base station MAC address, connection start time, connection disconnection time, channel/frequency/transmission/reception signal power.
  • the radio base station 12#A includes the number of connected terminals, the MAC address (pseudo) of the connected terminal, connection start time, connection disconnection time, and NW connection information such as channel/frequency/transmission/reception signal power. Send to the management server 13 .
  • the management server 13 associates sensor data and metadata with the terminal 11 .
  • the management server 13 holds a pseudo MAC address history table, terminal movement history, and connected terminal information.
  • the terminal 11 transmits the NW connection information before moving to the management server 13 as a probe request, which is a type of control system frame. Metadata may be stored in this control system frame, but metadata may not be stored.
  • the wireless base station 12 #B transmits the NW connection information before movement to the management server 13 as the connection terminal information of the terminal 11 .
  • Management server 13 identifies terminal identification information based on the held NW connection information and the connected terminal information transmitted from radio base station 12#B, and records the terminal movement history for each individual terminal 11. Update. That is, terminal management using NW connection information between the terminal 11 and the radio base station 12 is performed.
  • FIG. 4 shows an example of operations when the terminal 11 connects to the radio base station 12 in the first and second embodiments. If the wireless base station 12 of the terminal 11 is not moved (Yes in step S11), the metadata is inserted into the control system frame (S12), and the control system frame is transmitted (S13). When the wireless base station 12 of the terminal 11 is moved (No in step S11), the terminal identification information is inserted into the control system frame (S15), the metadata is inserted into the control system frame (S16), and the control system frame is transmitted. (S17).
  • the terminal 11 is managed using only metadata.
  • the terminal 11 transmits sensor data and metadata to the management server 13 .
  • the wireless base station 12#A transmits to the management server 13, as connected terminal information, the number of terminal connections, connection start time, connection disconnection time, and NW connection information such as channel/frequency/transmission/reception signal power.
  • the terminal 11 has a metadata history table.
  • the metadata history table holds metadata as a table when connected to the radio base station 12#A.
  • the metadata history is arbitrary data collected by the terminal 11, and can be exemplified by information such as location, installer, and environment.
  • the management server 13 associates sensor data and metadata with the terminal 11 .
  • the management server 13 manages connected terminal information (radio base station) and terminal movement history for each individual terminal 11 .
  • the terminal 11 When the terminal 11 moves to the base station, the terminal 11 transmits at least part of the past metadata stored in the metadata history to the management server 13. Metadata may be stored in this control system frame, but metadata may not be stored.
  • the radio base station 12 #B transmits the connected terminal information of the terminal 11 to the management server 13 .
  • the management server 13 Based on the collected metadata history, the management server 13 identifies the terminal identification information from the metadata collected so far on the management server 13 and updates the terminal movement history for each individual terminal 11 . That is, terminal management is performed using only metadata.
  • the pseudo MAC address history table and NW information do not need to be transmitted.
  • the terminal 11 does not transmit the pseudo MAC address history table, NW information, etc.
  • the location can be identified from information such as the location, installer, and environment as metadata.
  • at least a part of the metadata when connected to the radio base station 12#A before movement may be transmitted to the management server 13.
  • FIG. 6 shows a configuration example of the terminal 11.
  • the terminal 11 includes a wireless transmission/reception processing unit 21, a communication protocol operation processing unit 22, a terminal identification information storage processing unit 23, various metadata storage processing unit 24, a sensor data storage processing unit 25, a position information detection unit 26, and an installer detection unit. 27 , an environment information detection unit 28 , and a sensor 20 .
  • the position information detection unit 26 is any means for detecting the position information of the sensor 20.
  • a satellite positioning system including GPS, an acceleration sensor, a gyro, a Wi-Fi signal, a BLE beacon signal, and other RSSI (Received Signal Strength Indicator) reception.
  • RSSI Receiveived Signal Strength Indicator
  • the installer detection unit 27 is arbitrary means for detecting information on the user of the terminal 11 .
  • Information that identifies the installer Fingerprint sensor, vein sensor, camera (face/iris recognition), microphone (voiceprint detection)
  • Output values eg, blood pressure, heart rate, movement speed, utterance/conversation
  • the environment information detection unit 28 acquires information (metadata) other than sensor data. Either one or all of them may be used.
  • the terminal identification information storage processing unit 23 stores a pseudo MAC address history table, NW connection information, and the like for identifying the terminal 11 .
  • the sensor data storage processor 25 stores sensor data from the sensor 20 .
  • the wireless transmission/reception processing unit 21 transmits/receives data frames and control system frames.
  • the wireless transmission/reception processing unit 21 transmits a control system frame in which various kinds of metadata are stored in the original extension area of the control system frame.
  • Sensor data is stored in the payload area of the data frame and transmitted.
  • the communication protocol operation processing unit 22 transmits and receives control system frames.
  • the various metadata storage processing unit 24 stores the data from the location information detection unit 26, the installer detection unit 27, and the environment information detection unit 28, respectively, in the unique extension area of the control system frame of the wireless communication protocol.
  • the control system frame is a management frame and a control frame other than a data frame.
  • Beacon frame (a frame that broadcasts network information), Probe Request frame (a frame requesting network information), Probe Response frame (response to Probe Request), Association Request frame (frame requesting connection), Association Response frame (response to Association Request), Disassociation frame (a frame for disconnecting communication), Authentication frame (a frame for authenticating the other party), De-Authentication frame (frame to disconnect (end authentication)), Action frame (frame for general additional functionality), is included.
  • RTS frame (a frame for confirming whether it is okay to transmit data from now on), CTS frame (a frame indicating that data will be transmitted from now on), Ack frame (confirmation frame that data was received normally), Block Ack Request frame (a frame requesting an acknowledgment frame (Block Ack)), Block Ack frame (a collection of acknowledgment frames for multiple MAC frames), is included.
  • the various metadata storage processor 24 processes the data, such as converting it into a certain shortened code or dividing it into multiple frames (fragmentation), so as to conform to the format/restrictions of the unique extension area, and then stores the data. good too.
  • the data may be stored sequentially each time the data is updated, or the data may be stored after accumulating for a certain period of time.
  • the data to be stored may include records (logs), or may store the results of specific calculations/statistical processing.
  • the type and timing of metadata to be stored are not limited to constant, and may be dynamically changed by instructions from the terminal 11 side, or the data analysis unit or data collection unit.
  • the data to be stored may be encrypted using an instruction from the data analysis unit or collection unit or an encryption key preset on the terminal side and stored.
  • FIG. 7 is an example of an area for storing metadata in a control system frame of IEEE802.11 wireless LAN.
  • FIG. 7A shows an example in which the control system frame is a probe request frame.
  • the metadata is stored in the "Vendor Specific" area EXP.
  • FIG. 7B is an example in which the control system frame is a probe response frame.
  • the metadata is stored in the "Vendor Specific" area EXP.
  • the source of FIG. 7 is as follows. IEEE Std 802.11-2016, p. 708-712, IEEE Standard for Information Technology. Local and Metropolitan Area Networks. Specific Requirements, Part 11: Wireless LAN MAC and PHY Specifications,
  • the data collection system of the present disclosure collects metadata other than sensor data using the extended functions or optional functions of the communication protocol used for collecting sensor data.
  • low-layer communication protocols that do not require high performance can be used to collectively collect metadata in addition to sensor data, increasing costs and complicating operations. It is possible to realize an economical and highly reliable system by avoiding the occurrence of errors during conversion and association of sensor data and metadata.
  • the present disclosure is not limited to this.
  • device information of the terminal 11 may be collected instead of sensor data or together with sensor data.
  • the device of the present disclosure can also be implemented by a computer and a program, and the program can be recorded on a recording medium or provided through a network.
  • This disclosure can be applied to the information and communications industry.
  • Terminal 12 Radio base station 13: Management server 20: Sensor 21: Radio transmission/reception processing unit 22: Communication protocol operation processing unit 23: Terminal identification information storage processing unit 24: Various metadata storage processing unit 25: Sensor data storage processing Unit 26: Position information detection unit 27: Installer detection unit 28: Environment information detection unit

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/JP2021/024157 2021-06-25 2021-06-25 データを収集するシステム、方法、装置及びプログラム WO2022269906A1 (ja)

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PCT/JP2021/024157 WO2022269906A1 (ja) 2021-06-25 2021-06-25 データを収集するシステム、方法、装置及びプログラム
JP2023529410A JP7574930B2 (ja) 2021-06-25 2021-06-25 データを収集するシステム、方法、装置及びプログラム

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WO2024232072A1 (ja) * 2023-05-11 2024-11-14 日本電信電話株式会社 データ収集システム
WO2024232070A1 (ja) * 2023-05-11 2024-11-14 日本電信電話株式会社 データ収集システム

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WO2020235641A1 (ja) * 2019-05-21 2020-11-26 株式会社 Ｐｒｅｆｅｒｒｅｄ Ｎｅｔｗｏｒｋｓ 情報送信装置、情報収集装置、情報送信方法、情報収集方法及び移動体
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WO2024232072A1 (ja) * 2023-05-11 2024-11-14 日本電信電話株式会社 データ収集システム
WO2024232070A1 (ja) * 2023-05-11 2024-11-14 日本電信電話株式会社 データ収集システム

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