WO2022138042A1 - Wireless communication device and wireless communication system - Google Patents

Wireless communication device and wireless communication system Download PDF

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Publication number
WO2022138042A1
WO2022138042A1 PCT/JP2021/044237 JP2021044237W WO2022138042A1 WO 2022138042 A1 WO2022138042 A1 WO 2022138042A1 JP 2021044237 W JP2021044237 W JP 2021044237W WO 2022138042 A1 WO2022138042 A1 WO 2022138042A1
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Prior art keywords
wireless communication
communication device
condition
radio wave
control unit
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PCT/JP2021/044237
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French (fr)
Japanese (ja)
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明彦 柴田
博史 土基
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株式会社村田製作所
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Priority to JP2022572043A priority Critical patent/JPWO2022138042A1/ja
Publication of WO2022138042A1 publication Critical patent/WO2022138042A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • 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

Definitions

  • the present invention relates to a wireless communication device and a wireless communication system using the wireless communication device.
  • a stick-type biosensor for example, a stick-type thermometer
  • a wireless communication function which is attached to a living body to measure biological information such as the body temperature of the living body and transmit the measurement data wirelessly (radio).
  • a stick-type biosensor for example, a stick-type thermometer
  • a wireless communication function which is attached to a living body to measure biological information such as the body temperature of the living body and transmit the measurement data wirelessly (radio).
  • Patent Document 2 describes a receiving device that receives data by establishing a connection (connection state) with a specific transmitting device from among a plurality of transmitting devices (for example, the above-mentioned attached biosensor), and is the most radio wave.
  • a receiving device connected to a high-strength transmitting device is disclosed. More specifically, this receiving device includes a receiving unit and a control unit, and is configured to be capable of wireless communication with a plurality of transmitting devices that transmit signals including biometric information through different channels.
  • the receiving unit receives a signal from each transmitting device while switching channels.
  • the control unit determines the channel of the signal having the highest intensity among the plurality of signals received by the reception unit, and sets the determined channel as a monitoring channel for monitoring biological information thereafter.
  • the channel of the transmitting device since the channel of the signal having the highest strength is set as the monitoring channel, the channel of the transmitting device can be set easily and quickly without the need for manual input of the channel number or the like.
  • the radio field intensity is usually unstable and can easily change depending on, for example, the surrounding environment. Therefore, for example, when a plurality of transmitting devices (wireless communication devices) are present at the same distance from the receiving device (wireless communication device), the transmitting device (wireless communication device) showing the strongest radio wave strength may fluctuate. In such a case, the technique (reception device) disclosed in Patent Document 2 described above may connect to an unintended transmission device (wireless communication device).
  • the present invention has been made to solve the above problems, and in a wireless communication device that establishes a connection with a wireless communication device and performs wireless communication, without newly adding a dedicated component or the like (that is,). It is an object of the present invention to provide a wireless communication device capable of preventing connection with an unintended wireless communication device (without increasing the cost), and a wireless communication system using the wireless communication device.
  • the wireless communication device is a wireless communication device that establishes a connection with a wireless communication device and performs wireless communication, and is a wireless communication unit that transmits and receives radio waves to and from the wireless communication device, and a plurality of wireless communication devices. It is provided with a connection control unit that selects a wireless communication device to be connected from among the plurality of wireless communication devices when a radio wave from is received.
  • the connection control unit is a wireless communication that satisfies the first condition that the radio wave strength of the radio wave received by the wireless communication unit is the strongest and the radio wave strength is stronger than the next strongest radio wave strength by a predetermined value or more or a predetermined ratio or more. Select the device as the wireless communication device to establish the connection.
  • the wireless communication device when radio waves from a plurality of wireless communication devices are received, the radio wave strength of the received radio waves is the strongest, and the radio wave strength is higher than the radio wave strength of the next strongest.
  • a wireless communication device that satisfies the first condition of being stronger than a predetermined value or a predetermined ratio or more is selected as the wireless communication device for establishing a connection. That is, when radio waves from a plurality of wireless communication devices are received, a wireless communication device having a clearly stronger radio wave strength than the other wireless communication devices is selected from the plurality of wireless communication devices. Therefore, it is possible to prevent connection with an unintended wireless communication device.
  • the wireless communication device in order to establish a connection, the user simply brings the wireless communication device in the vicinity of the wireless communication device (closes the wireless communication device and the wireless communication device), for example.
  • a dedicated new component such as a display or a selection switch.
  • FIG. 1 It is a figure which shows the structure of the wireless communication system which used the wireless communication apparatus which concerns on embodiment. It is a block diagram which shows the functional structure of the wireless communication apparatus which concerns on embodiment. It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. It is a figure which shows the structure of the wireless communication system which used the wireless communication apparatus which concerns on a modification.
  • FIG. 1 is a diagram showing a configuration of a wireless communication system 1 using a wireless communication device 20.
  • FIG. 2 is a block diagram showing a functional configuration of the wireless communication device 20.
  • the wireless communication system 1 is mainly configured to include a wireless communication device 10 and a wireless communication device 20.
  • the wireless communication device 10 is, for example, a stick-on biosensor that is attached to a living body to measure biological information of the living body and transmit the measurement data wirelessly (hereinafter, the wireless communication device 10 is a stick-on type). It may also be called a biological sensor 10).
  • the wireless communication device 20 is a wireless communication device that establishes a connection (connection state) with a specific wireless communication device 10 and performs wireless communication.
  • the wireless communication device 20 is, for example, a conversion adapter that converts measurement data (digital data) received wirelessly from a wireless communication device (paste-type biological sensor) 10 into analog data and outputs the data by wire (hereinafter, wireless communication).
  • the device 20 may be referred to as a conversion adapter 20).
  • the wireless communication device (paste-type biosensor) 10 is attached to a measurement target (for example, an inpatient or an animal such as a dog or a cat) and detects biometric information from the measurement target.
  • a measurement target for example, an inpatient or an animal such as a dog or a cat
  • biometric information include body temperature, core body temperature, blood pressure, blood glucose level, oxygen saturation, heart rate, pulse rate, ECG, PPG, acceleration, angular velocity, and the like.
  • the wireless communication device (attached biosensor) 10 includes various biosensors (for example, body temperature sensor, photoelectric pulse wave sensor, pressure sensor, blood glucose level sensor, oxygen saturation sensor) that detect (acquire) these biometric information.
  • Pulse wave sensor, electrocardiographic electrode, acceleration sensor, angular velocity sensor, etc. are used.
  • the wireless communication device (paste type biosensor) 10 includes an AD converter that converts an analog signal (biological signal) into digital data, and converts the detected biomedical signal into digital data (biological information). Further, the wireless communication device (paste type biosensor) 10 includes a wireless communication module and wirelessly transmits AD-converted digital data (biological information).
  • the digital data (biological information) may be physical quantities such as temperature and pressure, or waveform data such as electrocardiography.
  • a wireless communication method such as BLE (Bluetooth (registered trademark) Low Energy), WiFi, LTE (Long Term Evolution), subgiga (900 MHz band) is used.
  • a wireless communication method such as NFC (Near Field Communication) (ISO / IEC 18092) or MIFARE (registered trademark) (ISO / IEC 14443) may be used.
  • the wireless communication device 10 also wirelessly transmits information (identification information) such as a device address (in the case of BLE) and a Mac address (in the case of WiFi).
  • the wireless communication device (conversion adapter) 20 is a conversion used to connect the wireless communication device (wireless stick-on biosensor) 10 to the wired biometric information monitor (bedside monitor) 100. It is a device.
  • the wireless communication device (conversion adapter) 20 enables connection between the wireless communication device (attached biosensor) 10 and the wired biometric information monitor 100 by absorbing differences in specifications and voltages. do.
  • the biological information monitor 100 a known wired / analog input type biological information monitor can be used.
  • the biological information monitor 100 is provided with a display screen, and is detected, converted, and transmitted by a wireless communication device (paste-type biological sensor) 10, and received, converted, and relayed via a wireless communication device (conversion adapter) 20. Enter and display information.
  • a wireless communication device praste-type biological sensor
  • conversion adapter wireless communication device
  • the wireless communication device 20 has a function of preventing unintended connection with the wireless communication device 10 without adding new dedicated parts such as a display and a selection switch (that is, without cost increase). have. Therefore, the wireless communication device 20 has a wireless communication unit 21 that transmits and receives radio waves to and from the wireless communication device 10, and when radio waves from the plurality of wireless communication devices 10 are received (that is, a plurality of radio waves within the reach of the radio waves). (When the communication device 10 exists) is provided with a connection control unit 22 for selecting the wireless communication device 10 to be connected from the plurality of wireless communication devices 10.
  • the wireless communication unit 21 includes, for example, a communication module including a BLE chip and the like.
  • the wireless communication unit 21 receives biometric information of digital data transmitted by wireless communication from an external wireless communication device (paste type biosensor) 10.
  • the wireless communication unit 21 receives a plurality of temperature information, photoelectric pulse wave information, and the like as biological information.
  • BLE Bluetooth (registered trademark) Low Energy
  • WiFi Wireless Fidelity
  • LTE Long Term Evolution
  • subgiga A wireless communication method (wireless communication standard) such as 900 MHz band) is used.
  • a wireless communication method wireless communication standard
  • a wireless communication method such as NFC (Near Field Communication) (ISO / IEC 18092) or MIFARE (registered trademark) (ISO / IEC 14443) may be used.
  • the wireless communication unit 21 obtains the identification information of the wireless communication device 10 (for example, the device address (in the case of BLE) or the Mac address (in the case of WiFi)).
  • the radio wave strength of the wireless communication device 10 (received signal strength (Received Signal Strength Indicator: RSSI)) is associated with (related to) and output to the connection control unit 22.
  • the connection control unit 22 is configured to have an MCU (Micro Control Unit) or the like.
  • the connection control unit 22 receives radio waves from the wireless communication unit 21 when radio waves from the plurality of wireless communication devices 10 are received (that is, when a plurality of wireless communication devices 10 are within the reach of the radio waves).
  • the communication device 10 is selected as the wireless communication device 10 for establishing a connection.
  • the connection control unit 22 selects the wireless communication device 10B as the wireless communication device 10 for establishing the connection.
  • the connection control unit 22 further provides a wireless communication device 10 that satisfies the second condition that the radio wave strength (received signal strength) is equal to or higher than the second predetermined value (for example, ⁇ 90 dBm). It is preferable to select it as the wireless communication device 10 for establishing the connection. By doing so, only the nearby wireless communication device 10 can be connected. That is, it is possible to prevent the connection with an unintended wireless communication device 10 at a distance. More specifically, for example, if only the wireless communication device 20 is started first in this room while trying to connect at the same timing in the next room, the wireless communication device 10 in the next room It is possible to prevent problems such as receiving the radio waves of the above and accidentally connecting.
  • the second predetermined value for example, ⁇ 90 dBm
  • connection control unit 22 sets that the state satisfying the first condition and the second condition (or at least the first condition) is continued for a predetermined time (for example, 5 seconds) or more, and the first condition is the first condition.
  • a predetermined time for example, 5 seconds
  • the wireless communication device 10 that satisfies the third condition as the wireless communication device 10 for establishing the connection.
  • wireless communication devices 10A and 10B there are a plurality of (two in the example of FIG. 5) wireless communication devices 10A and 10B at equal distances from the wireless communication device 20, and the radio wave intensities are substantially the same. Therefore, if a person passes between one of the wireless communication devices 10A and the wireless communication device 20 while neither is connected, the radio waves are blocked and the radio waves of the one wireless communication device 10A are blocked. The strength drops for a moment. Therefore, the first condition may be satisfied and the wireless communication device 10B may be connected to the other wireless communication device 10B. In this case, by providing the third condition, it is possible to prevent the connection with such an unintended wireless communication device 10B.
  • connection control unit 22 has a fourth condition that the fluctuation rate or fluctuation range of the radio wave strength (received signal strength) is equal to or less than a predetermined threshold value (for example, 5% or 3 dBm), and the first condition and the second condition.
  • a predetermined threshold value for example, 5% or 3 dBm
  • FIG. 6 there are a plurality of (two in the example of FIG. 6) wireless communication devices 10A and 10B at equal distances from the wireless communication device 20, and the radio wave intensities are substantially the same. Therefore, if a patient wearing the wireless communication device 10C passes nearby while the wireless communication device 10C is not connected to any of them, the radio wave strength of the wireless communication device 10C becomes prominent and strong at the time of approaching, thereby erroneously increasing the radio wave communication device. There is a risk of being connected to 10C. For example, the radio field strength of the wireless communication device 10C attached to a walking patient changes from moment to moment as the patient moves, that is, the rate of change in radio field strength does not stay below a predetermined threshold value. By providing the above-mentioned fourth condition, it is possible to prevent the connection with such an unintended wireless communication device 10C.
  • connection control unit 22 repeatedly executes and selects whether or not the first condition, the second condition, the third condition, and the fourth condition (or at least the first condition) are satisfied. It is preferable to add the wireless communication device 10 that establishes the connection. By doing so, it is possible to connect to a plurality of wireless communication devices 10 while preventing an unintended connection to the wireless communication device 10.
  • connection control unit 22 selects (connects) any of the wireless communication devices 10 when the first condition, the second condition, the third condition, and the fourth condition (or at least the first condition) are not satisfied. do not do.
  • the connection control unit 22 does not select (connect) any of the wireless communication devices 10A, 10B, and 10C.
  • connection control unit 22 has only one wireless communication device 10 for which radio waves have been received, it is preferable that the wireless communication device 10 is selected as the wireless communication device 10 for establishing a connection.
  • the radio wave strength (received signal strength) of the received radio waves is the strongest, and the radio wave strength is next.
  • the wireless communication device 10 that satisfies the first condition of being stronger than the strong radio wave intensity by a predetermined value or more or a predetermined ratio or more is selected and connected as the wireless communication device 10 for establishing the connection.
  • the biometric information of the digital data transmitted wirelessly from the wireless communication device (attached biosensor) 10 is received, the received biometric information is processed into data, and an external biometric information monitor (bedside monitor) is used. It is converted into analog data conforming to 100 (conversion unit 23). Then, it is output by wire via the connection unit 24.
  • the other wireless communication device 10 when radio waves from a plurality of wireless communication devices 10 are received, the other wireless communication device 10 is selected from the plurality of wireless communication devices 10.
  • the wireless communication device 10 having a clearly strong radio wave strength (received signal strength) is selected and connected. Therefore, it is possible to prevent an unintended connection with the wireless communication device 10.
  • the user in order to establish a connection, the user simply brings the wireless communication device 10 in the vicinity of the wireless communication device 20 (closes the wireless communication device 10 and the wireless communication device 20), for example.
  • a dedicated component such as a display or a selection switch.
  • the present embodiment it is possible to prevent an unintended connection with the wireless communication device 10 without adding a new dedicated component or the like (that is, without increasing the cost).
  • the effect is exhibited in the conversion adapter 20 which does not have a display device or the like.
  • the wireless communication device 10 satisfying the second condition that the radio wave strength (received signal strength) is equal to or higher than the second predetermined value makes a connection. It is selected as the wireless communication device 10 to be established. Therefore, only the nearby wireless communication device 10 can be connected. That is, it is possible to prevent the device from being connected to an unintended wireless communication device 10 in a distant place.
  • the third condition is that the state of satisfying the first condition and the second condition (or at least the first condition) is continued for a predetermined time or more, and the first condition and the first condition are satisfied.
  • the wireless communication device 10 satisfying the third condition is further selected as the wireless communication device 10 for establishing the connection. Therefore, for example, it is possible to prevent the radio wave strength from fluctuating momentarily due to a short-time disturbance, satisfying the first condition and the like, and being connected to an unintended wireless communication device 10.
  • the fourth condition is that the fluctuation rate or fluctuation range of the radio wave strength (received signal strength) is equal to or less than a predetermined threshold value, and the first condition, the second condition, and the third condition are satisfied.
  • the wireless communication device 10 satisfying the fourth condition is further selected as the wireless communication device 10 for establishing the connection. Therefore, for example, when a person wearing the wireless communication device 10 passes near the wireless communication device 20, it is possible to prevent accidental connection.
  • the determination of whether or not the first condition, the second condition, the third condition, and the fourth condition (or at least the first condition) are satisfied is repeatedly executed and selected.
  • the wireless communication device 10 to be connected is added. Therefore, it is possible to connect to a plurality of wireless communication devices 10 while preventing an unintended connection to the wireless communication device 10.
  • the wireless communication device 20 may be, for example, a smartphone in which application software such as body temperature measurement is installed.
  • a smartphone is used as the wireless communication device 20, as shown in FIG. 7, for example, Bluetooth (registered trademark), BLE (Bluetooth (registered trademark) Low Energy), WiFi, infrared communication, NFC (Near Field Communication), etc. It communicates with the wireless communication device (paste type biosensor) 10 by wireless communication, acquires the measurement data, and displays it on the screen.
  • the wireless communication device 20 may be, for example, a node (repeater) or the like.
  • the wireless communication unit 21 may be configured to transmit information (for example, connection confirmation information with the wireless communication device 10) to the wireless communication device (attached biosensor) 10 by using wireless communication.
  • information for example, connection confirmation information with the wireless communication device 10.
  • the connection confirmation switch push switch
  • a connection confirmation command is transmitted, and the LED of the wirelessly connected (paired) wireless communication device 10 lights up or blinks. Instead of lighting or blinking the LED, it may vibrate or buzzer.
  • the connection target is confirmed by receiving the connection confirmation information and causing the wireless communication device 10 side to emit light or make a sound. Can be done.
  • the wireless communication unit 21 may be configured to support wireless communication of a plurality of different wireless communication methods. More specifically, for example, the configuration may include a plurality of wireless communication units (wireless communication drivers) 21.
  • the plurality of wireless communication units (wireless communication drivers) 21 may use wireless communication methods (wireless) such as BLE (Bluetooth (registered trademark) Low Energy), WiFi, LTE (Long Term Evolution), and subgiga (900 MHz band). Communication standard), and it is preferable to adopt a wireless communication method (wireless communication standard) such as NFC (Near Field Communication) (ISO / IEC 18092) or MIFARE (registered trademark) (ISO / IEC 14443).
  • one wireless communication device (conversion adapter) 20 can be connected to a wireless communication device 10 having various different communication drivers, so that various sensor information can be transmitted for general purposes. can.
  • Wireless communication system 10 10A, 10B, 10C Wireless communication device (paste type biosensor) 20 Wireless communication device (conversion adapter / smartphone / repeater) 21 Wireless communication unit 22 Connection control unit 100 Biometric information monitor

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Abstract

A wireless communication device (20) comprises: a wireless communication unit (21) which transmits/receives radio waves to/from a wireless communication device (10); and a connection control unit (22) which, upon receiving radio waves from a plurality of wireless communication devices (10), selects from among the plurality of wireless communication devices (10) a wireless communication device (10) to connect to. The connection control unit (22) selects, as the wireless communication device (10) with which to establish a connection, a wireless communication device (10) which satisfies a first condition that the radio wave intensity of a received radio wave (received signal intensity) is the highest and is higher than the second highest radio wave intensity by not less than a prescribed value or not less than a prescribed percentage.

Description

無線通信装置、及び、無線通信システムWireless communication equipment and wireless communication system
　本発明は、無線通信装置、及び、該無線通信装置を用いた無線通信システムに関する。 The present invention relates to a wireless communication device and a wireless communication system using the wireless communication device.
　従来から、生体に貼り付けられて、例えば生体の体温等の生体情報を測定し、その測定データを無線（電波）で送信する、無線通信機能を備えた貼付型の生体センサ（例えば貼付型体温計）が知られている（例えば特許文献１など参照）。 Conventionally, a stick-type biosensor (for example, a stick-type thermometer) equipped with a wireless communication function, which is attached to a living body to measure biological information such as the body temperature of the living body and transmit the measurement data wirelessly (radio). ) Is known (see, for example, Patent Document 1).
　また、特許文献２には、複数の送信装置（例えば上記貼付型生体センサ）の中から、特定の送信装置と接続（接続状態）を確立してデータを受信する受信装置であって、最も電波強度が強い送信装置と接続する受信装置が開示されている。より具体的には、この受信装置は、受信部と制御部とを備え、異なるチャネルを通じて生体情報を含む信号を送信する複数の送信装置と無線通信可能に構成されている。受信部は、チャネルを切り換えつつ、各送信装置から信号を受信する。制御部は、受信部により受信された複数の信号のうち、強度が最も高い信号のチャネルを判定し、判定したチャネルを以後に生体情報を監視する監視チャネルとして設定する。 Further, Patent Document 2 describes a receiving device that receives data by establishing a connection (connection state) with a specific transmitting device from among a plurality of transmitting devices (for example, the above-mentioned attached biosensor), and is the most radio wave. A receiving device connected to a high-strength transmitting device is disclosed. More specifically, this receiving device includes a receiving unit and a control unit, and is configured to be capable of wireless communication with a plurality of transmitting devices that transmit signals including biometric information through different channels. The receiving unit receives a signal from each transmitting device while switching channels. The control unit determines the channel of the signal having the highest intensity among the plurality of signals received by the reception unit, and sets the determined channel as a monitoring channel for monitoring biological information thereafter.
　この受信装置によれば、強度が最も高い信号のチャネルを監視チャネルとして設定するので、チャネル番号等の手入力が必要なく、手軽かつ迅速に送信装置のチャネルを設定することができる。 According to this receiving device, since the channel of the signal having the highest strength is set as the monitoring channel, the channel of the transmitting device can be set easily and quickly without the need for manual input of the channel number or the like.
特開２０１９－１４１６２２号公報JP-A-2019-141622 特開２０１６－１０４２１３号公報Japanese Unexamined Patent Publication No. 2016-104213
　しかしながら、通常、電波強度は不安定であり、例えば周囲の環境等によっても容易に変化し得る。そのため、例えば、受信装置（無線通信装置）から同じ位の距離に、複数の送信装置（無線通信デバイス）が存在する場合、最も強い電波強度を示す送信装置（無線通信デバイス）は変動し得る。このような場合、上述した特許文献２に開示された技術（受信装置）では、意図しない送信装置（無線通信デバイス）と接続してしまうおそれがある。 However, the radio field intensity is usually unstable and can easily change depending on, for example, the surrounding environment. Therefore, for example, when a plurality of transmitting devices (wireless communication devices) are present at the same distance from the receiving device (wireless communication device), the transmitting device (wireless communication device) showing the strongest radio wave strength may fluctuate. In such a case, the technique (reception device) disclosed in Patent Document 2 described above may connect to an unintended transmission device (wireless communication device).
　一方、接続を確立する送信装置（無線通信デバイス）を手動で選択するために、例えばディスプレイや選択スイッチ等の専用の部品等を新たに追加すると、装置のコストが上昇してしまう。 On the other hand, if a dedicated component such as a display or a selection switch is newly added in order to manually select a transmission device (wireless communication device) for establishing a connection, the cost of the device will increase.
　本発明は、上記問題点を解消する為になされたものであり、無線通信デバイスと接続を確立して無線通信を行う無線通信装置において、専用の部品等を新たに追加することなく（すなわち、コストアップを伴うことなく）、意図しない無線通信デバイスとの接続を防止することが可能な無線通信装置、及び、該無線通信装置を用いた無線通信システムを提供することを目的とする。 The present invention has been made to solve the above problems, and in a wireless communication device that establishes a connection with a wireless communication device and performs wireless communication, without newly adding a dedicated component or the like (that is,). It is an object of the present invention to provide a wireless communication device capable of preventing connection with an unintended wireless communication device (without increasing the cost), and a wireless communication system using the wireless communication device.
　本発明に係る無線通信装置は、無線通信デバイスと接続を確立して無線通信を行う無線通信装置であって、無線通信デバイスとの間で電波を送受信する無線通信部と、複数の無線通信デバイスからの電波が受信された場合に、当該複数の無線通信デバイスの中から接続する無線通信デバイスを選択する接続制御部とを備える。接続制御部は、無線通信部により受信された電波の電波強度が最も強く、かつ、当該電波強度が次に強い電波強度よりも所定値以上又は所定割合以上強いという第１条件を満足する無線通信デバイスを、接続を確立する無線通信デバイスとして選択する。 The wireless communication device according to the present invention is a wireless communication device that establishes a connection with a wireless communication device and performs wireless communication, and is a wireless communication unit that transmits and receives radio waves to and from the wireless communication device, and a plurality of wireless communication devices. It is provided with a connection control unit that selects a wireless communication device to be connected from among the plurality of wireless communication devices when a radio wave from is received. The connection control unit is a wireless communication that satisfies the first condition that the radio wave strength of the radio wave received by the wireless communication unit is the strongest and the radio wave strength is stronger than the next strongest radio wave strength by a predetermined value or more or a predetermined ratio or more. Select the device as the wireless communication device to establish the connection.
　本発明に係る無線通信装置によれば、複数の無線通信デバイスからの電波が受信された場合に、受信された電波の電波強度が最も強く、かつ、当該電波強度が次に強い電波強度よりも所定値以上又は所定割合以上強いという第１条件を満足する無線通信デバイスが、接続を確立する無線通信デバイスとして選択される。すなわち、複数の無線通信デバイスからの電波が受信された場合に、当該複数の無線通信デバイスの中から、他の無線通信デバイスよりも明らかに電波強度が強い無線通信デバイスが選択される。そのため、意図しない無線通信デバイスとの接続を防止することができる。 According to the wireless communication device according to the present invention, when radio waves from a plurality of wireless communication devices are received, the radio wave strength of the received radio waves is the strongest, and the radio wave strength is higher than the radio wave strength of the next strongest. A wireless communication device that satisfies the first condition of being stronger than a predetermined value or a predetermined ratio or more is selected as the wireless communication device for establishing a connection. That is, when radio waves from a plurality of wireless communication devices are received, a wireless communication device having a clearly stronger radio wave strength than the other wireless communication devices is selected from the plurality of wireless communication devices. Therefore, it is possible to prevent connection with an unintended wireless communication device.
　また、本発明に係る無線通信装置によれば、接続を確立するためにユーザは、例えば、無線通信デバイスを無線通信装置の近傍に持って行く（無線通信デバイスと無線通信装置とを近づける）だけでよく、接続を確立する無線通信デバイスを選択するために、例えばディスプレイや選択スイッチ等の専用の新たな部品等を追加する必要はない。 Further, according to the wireless communication device according to the present invention, in order to establish a connection, the user simply brings the wireless communication device in the vicinity of the wireless communication device (closes the wireless communication device and the wireless communication device), for example. In order to select a wireless communication device for establishing a connection, it is not necessary to add a dedicated new component such as a display or a selection switch.
　その結果、本発明によれば、専用の部品等を新たに追加することなく（すなわち、コストアップを伴うことなく）、意図しない無線通信デバイスとの接続を防止することが可能となる。 As a result, according to the present invention, it is possible to prevent an unintended connection with a wireless communication device without adding a new dedicated component or the like (that is, without increasing the cost).
実施形態に係る無線通信装置を用いた無線通信システムの構成を示す図である。It is a figure which shows the structure of the wireless communication system which used the wireless communication apparatus which concerns on embodiment. 実施形態に係る無線通信装置の機能構成を示すブロック図である。It is a block diagram which shows the functional structure of the wireless communication apparatus which concerns on embodiment. 実施形態に係る無線通信システム（無線通信装置）の動作を説明するための図である。It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. 実施形態に係る無線通信システム（無線通信装置）の動作を説明するための図である。It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. 実施形態に係る無線通信システム（無線通信装置）の動作を説明するための図である。It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. 実施形態に係る無線通信システム（無線通信装置）の動作を説明するための図である。It is a figure for demonstrating operation of the wireless communication system (wireless communication apparatus) which concerns on embodiment. 変形例に係る無線通信装置を用いた無線通信システムの構成を示す図である。It is a figure which shows the structure of the wireless communication system which used the wireless communication apparatus which concerns on a modification.
　以下、図面を参照して本発明の好適な実施形態について詳細に説明する。なお、図中、同一又は相当部分には同一符号を用いることとする。また、各図において、同一要素には同一符号を付して重複する説明を省略する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the figure, the same reference numerals are used for the same or corresponding parts. Further, in each figure, the same elements are designated by the same reference numerals, and duplicate description will be omitted.
　まず、図１～図２を併せて用いて、実施形態に係る無線通信装置２０、及び、無線通信装置２０を用いた無線通信システム１の構成について説明する。図１は、無線通信装置２０を用いた無線通信システム１の構成を示す図である。図２は、無線通信装置２０の機能構成を示すブロック図である。 First, the configuration of the wireless communication device 20 according to the embodiment and the wireless communication system 1 using the wireless communication device 20 will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing a configuration of a wireless communication system 1 using a wireless communication device 20. FIG. 2 is a block diagram showing a functional configuration of the wireless communication device 20.
　無線通信システム１は、主として、無線通信デバイス１０と、無線通信装置２０とを備えて構成されている。無線通信デバイス１０は、例えば、生体に貼り付けられて、生体の生体情報を測定し、その測定データを無線（電波）で送信する貼付型生体センサである（以下、無線通信デバイス１０を貼付型生体センサ１０と呼ぶこともある）。無線通信装置２０は、特定の無線通信デバイス１０と接続（接続状態）を確立して無線通信を行う無線通信装置である。無線通信装置２０は、例えば、無線通信デバイス（貼付型生体センサ）１０から、無線で受信した測定データ（デジタルデータ）をアナログデータに変換して有線で出力する変換アダプタである（以下、無線通信装置２０を変換アダプタ２０と呼ぶこともある）。 The wireless communication system 1 is mainly configured to include a wireless communication device 10 and a wireless communication device 20. The wireless communication device 10 is, for example, a stick-on biosensor that is attached to a living body to measure biological information of the living body and transmit the measurement data wirelessly (hereinafter, the wireless communication device 10 is a stick-on type). It may also be called a biological sensor 10). The wireless communication device 20 is a wireless communication device that establishes a connection (connection state) with a specific wireless communication device 10 and performs wireless communication. The wireless communication device 20 is, for example, a conversion adapter that converts measurement data (digital data) received wirelessly from a wireless communication device (paste-type biological sensor) 10 into analog data and outputs the data by wire (hereinafter, wireless communication). The device 20 may be referred to as a conversion adapter 20).
　無線通信デバイス（貼付型生体センサ）１０は、上述したように、測定対象（例えば入院患者や、犬・猫などの動物）に取り付けられ、該測定対象から生体情報を検出する貼付型の生体センサである（なお、犬や猫などの毛がある動物に用いる場合には、例えば紐や布などで固定してもよい）。ここで、生体情報としては、例えば、体温、深部体温、血圧、血糖値、酸素飽和度、心拍数、脈拍数、ＥＣＧ、ＰＰＧ、加速度、角速度などを挙げることができる。すなわち、無線通信デバイス（貼付型生体センサ）１０としては、これらの生体情報を検出（取得）する各種生体センサ（例えば、体温センサ、光電脈波センサ、圧力センサ、血糖値センサ、酸素飽和度センサ、脈波センサ、心電電極、加速度センサ、角速度センサなど）が用いられる。 As described above, the wireless communication device (paste-type biosensor) 10 is attached to a measurement target (for example, an inpatient or an animal such as a dog or a cat) and detects biometric information from the measurement target. (When used for animals with hair such as dogs and cats, they may be fixed with a string or cloth, for example). Here, examples of the biological information include body temperature, core body temperature, blood pressure, blood glucose level, oxygen saturation, heart rate, pulse rate, ECG, PPG, acceleration, angular velocity, and the like. That is, the wireless communication device (attached biosensor) 10 includes various biosensors (for example, body temperature sensor, photoelectric pulse wave sensor, pressure sensor, blood glucose level sensor, oxygen saturation sensor) that detect (acquire) these biometric information. , Pulse wave sensor, electrocardiographic electrode, acceleration sensor, angular velocity sensor, etc.) are used.
　無線通信デバイス（貼付型生体センサ）１０は、アナログ信号（生体信号）をデジタルデータに変換するＡＤコンバータを備えており、検出した生体信号をデジタルデータ（生体情報）に変換する。また、無線通信デバイス（貼付型生体センサ）１０は、無線通信モジュールを備え、ＡＤ変換したデジタルデータ（生体情報）を、無線で送信する。なお、デジタルデータ（生体情報）は、温度や圧力等の物理量であっても、心電等の波形データであってもよい。 The wireless communication device (paste type biosensor) 10 includes an AD converter that converts an analog signal (biological signal) into digital data, and converts the detected biomedical signal into digital data (biological information). Further, the wireless communication device (paste type biosensor) 10 includes a wireless communication module and wirelessly transmits AD-converted digital data (biological information). The digital data (biological information) may be physical quantities such as temperature and pressure, or waveform data such as electrocardiography.
　ここで、無線通信には、例えば、ＢＬＥ（Ｂｌｕｅｔｏｏｔｈ（登録商標）　Ｌｏｗ　Ｅｎｅｒｇｙ）、ＷｉＦｉ、ＬＴＥ（Ｌｏｎｇ　Ｔｅｒｍ　Ｅｖｏｌｕｔｉｏｎ）、サブギガ（９００ＭＨｚ帯）などの無線通信方式（無線通信規格）が用いられる。また、例えば、ＮＦＣ（Ｎｅａｒ　Ｆｉｅｌｄ　Ｃｏｍｍｕｎｉｃａｔｉｏｎ）（ＩＳＯ／ＩＥＣ　１８０９２）や、ＭＩＦＡＲＥ（登録商標）（ＩＳＯ／ＩＥＣ　１４４４３）などの無線通信方式（無線通信規格）を用いてもよい。なお、無線通信デバイス１０は、デバイスアドレス（ＢＬＥの場合）やマックアドレス（ＷｉＦｉの場合）等の情報（識別情報）も無線で送信する。 Here, for wireless communication, for example, a wireless communication method (wireless communication standard) such as BLE (Bluetooth (registered trademark) Low Energy), WiFi, LTE (Long Term Evolution), subgiga (900 MHz band) is used. Further, for example, a wireless communication method (wireless communication standard) such as NFC (Near Field Communication) (ISO / IEC 18092) or MIFARE (registered trademark) (ISO / IEC 14443) may be used. The wireless communication device 10 also wirelessly transmits information (identification information) such as a device address (in the case of BLE) and a Mac address (in the case of WiFi).
　無線通信装置（変換アダプタ）２０は、上述したように、無線通信デバイス（無線式の貼付型生体センサ）１０を、有線式の生体情報モニタ（ベッドサイドモニタ）１００に接続するために用いられる変換装置である。無線通信装置（変換アダプタ）２０は、無線通信デバイス（貼付型生体センサ）１０と、有線式の生体情報モニタ１００との間の規格や電圧などの差異を吸収することにより双方の接続を可能とする。 As described above, the wireless communication device (conversion adapter) 20 is a conversion used to connect the wireless communication device (wireless stick-on biosensor) 10 to the wired biometric information monitor (bedside monitor) 100. It is a device. The wireless communication device (conversion adapter) 20 enables connection between the wireless communication device (attached biosensor) 10 and the wired biometric information monitor 100 by absorbing differences in specifications and voltages. do.
　生体情報モニタ１００には、公知の有線式・アナログ入力式の生体情報モニタを用いることができる。生体情報モニタ１００は、表示画面を備えており、無線通信デバイス（貼付型生体センサ）１０により検出・変換・送信され、無線通信装置（変換アダプタ）２０を介して受信・変換・中継された生体情報を入力して表示する。 As the biological information monitor 100, a known wired / analog input type biological information monitor can be used. The biological information monitor 100 is provided with a display screen, and is detected, converted, and transmitted by a wireless communication device (paste-type biological sensor) 10, and received, converted, and relayed via a wireless communication device (conversion adapter) 20. Enter and display information.
　特に、無線通信装置２０は、例えばディスプレイや選択スイッチ等の専用の部品等を新たに追加することなく（すなわち、コストアップを伴うことなく）、意図しない無線通信デバイス１０との接続を防止する機能を有している。そのため、無線通信装置２０は、無線通信デバイス１０との間で電波を送受信する無線通信部２１と、複数の無線通信デバイス１０からの電波が受信された場合（すなわち電波が届く範囲に複数の無線通信デバイス１０が存在する場合）に、当該複数の無線通信デバイス１０の中から接続する無線通信デバイス１０を選択する接続制御部２２とを備えている。 In particular, the wireless communication device 20 has a function of preventing unintended connection with the wireless communication device 10 without adding new dedicated parts such as a display and a selection switch (that is, without cost increase). have. Therefore, the wireless communication device 20 has a wireless communication unit 21 that transmits and receives radio waves to and from the wireless communication device 10, and when radio waves from the plurality of wireless communication devices 10 are received (that is, a plurality of radio waves within the reach of the radio waves). (When the communication device 10 exists) is provided with a connection control unit 22 for selecting the wireless communication device 10 to be connected from the plurality of wireless communication devices 10.
　無線通信部２１は、例えば、ＢＬＥチップ等を含む通信モジュールからなる。無線通信部２１は、外部の無線通信デバイス（貼付型生体センサ）１０から、無線通信を用いて送信されるデジタルデータの生体情報を受信する。例えば、無線通信部２１は、生体情報として複数の温度情報や、光電脈波情報等を受信する。無線通信部２１では、上述した無線通信デバイス（貼付型生体センサ）１０の無線通信方式に合わせて、例えば、ＢＬＥ（Ｂｌｕｅｔｏｏｔｈ（登録商標）　Ｌｏｗ　Ｅｎｅｒｇｙ）、ＷｉＦｉ、ＬＴＥ（Ｌｏｎｇ　Ｔｅｒｍ　Ｅｖｏｌｕｔｉｏｎ）、サブギガ（９００ＭＨｚ帯）などの無線通信方式（無線通信規格）が用いられる。また、例えば、ＮＦＣ（Ｎｅａｒ　Ｆｉｅｌｄ　Ｃｏｍｍｕｎｉｃａｔｉｏｎ）（ＩＳＯ／ＩＥＣ　１８０９２）や、ＭＩＦＡＲＥ（登録商標）（ＩＳＯ／ＩＥＣ　１４４４３）などの無線通信方式（無線通信規格）を用いてもよい。 The wireless communication unit 21 includes, for example, a communication module including a BLE chip and the like. The wireless communication unit 21 receives biometric information of digital data transmitted by wireless communication from an external wireless communication device (paste type biosensor) 10. For example, the wireless communication unit 21 receives a plurality of temperature information, photoelectric pulse wave information, and the like as biological information. In the wireless communication unit 21, for example, BLE (Bluetooth (registered trademark) Low Energy), WiFi, LTE (Long Term Evolution), subgiga ( A wireless communication method (wireless communication standard) such as 900 MHz band) is used. Further, for example, a wireless communication method (wireless communication standard) such as NFC (Near Field Communication) (ISO / IEC 18092) or MIFARE (registered trademark) (ISO / IEC 14443) may be used.
　また、無線通信部２１は、無線通信デバイス１０からの電波が受信された場合に、その無線通信デバイス１０の識別情報（例えば、デバイスアドレス（ＢＬＥの場合）やマックアドレス（ＷｉＦｉの場合））と、その無線通信デバイス１０の電波強度（受信信号強度（Ｒｅｃｅｉｖｅｄ　Ｓｉｇｎａｌ　Ｓｔｒｅｎｇｔｈ　Ｉｎｄｉｃａｔｏｒ：ＲＳＳＩ））とを対応付けて（関係付けて）接続制御部２２に出力する。 Further, when the radio wave from the wireless communication device 10 is received, the wireless communication unit 21 obtains the identification information of the wireless communication device 10 (for example, the device address (in the case of BLE) or the Mac address (in the case of WiFi)). , The radio wave strength of the wireless communication device 10 (received signal strength (Received Signal Strength Indicator: RSSI)) is associated with (related to) and output to the connection control unit 22.
　接続制御部２２は、ＭＣＵ（Ｍｉｃｒｏ　Ｃｏｎｔｒｏｌ　Ｕｎｉｔ）等を有して構成されている。接続制御部２２は、複数の無線通信デバイス１０からの電波が受信された場合（すなわち電波が届く範囲に複数の無線通信デバイス１０が存在する場合）に、無線通信部２１により受信された電波の電波強度（受信信号強度）が最も強く、かつ、当該電波強度が次に強い電波強度よりも、所定値以上（例えば１０ｄＢｍ）又は所定割合（例えば１０％）以上強いという第１条件を満足する無線通信デバイス１０を、接続を確立する無線通信デバイス１０として選択する。 The connection control unit 22 is configured to have an MCU (Micro Control Unit) or the like. The connection control unit 22 receives radio waves from the wireless communication unit 21 when radio waves from the plurality of wireless communication devices 10 are received (that is, when a plurality of wireless communication devices 10 are within the reach of the radio waves). A radio that satisfies the first condition that the radio wave strength (received signal strength) is the strongest and the radio wave strength is stronger than a predetermined value (for example, 10 dBm) or a predetermined ratio (for example, 10%) or more than the next strongest radio wave strength. The communication device 10 is selected as the wireless communication device 10 for establishing a connection.
　ここで、例えば、図３に示した例では、無線通信デバイス１０Ａの電波強度が－８０ｄＢｍであり、無線通信デバイス１０Ｂの電波強度が－５０ｄＢｍであり、無線通信デバイス１０Ｃの電波強度が－７５ｄＢｍであるため、接続制御部２２は、無線通信デバイス１０Ｂを接続を確立する無線通信デバイス１０として選択する。 Here, for example, in the example shown in FIG. 3, the radio wave strength of the wireless communication device 10A is −80 dBm, the radio wave strength of the wireless communication device 10B is −50 dBm, and the radio wave strength of the wireless communication device 10C is −75 dBm. Therefore, the connection control unit 22 selects the wireless communication device 10B as the wireless communication device 10 for establishing the connection.
　接続制御部２２は、上記第１条件に加えて、さらに、電波強度（受信信号強度）が第２所定値（例えば－９０ｄＢｍ）以上であることという第２条件を満足する無線通信デバイス１０を、接続を確立する無線通信デバイス１０として選択することが好ましい。このようにすれば、近傍の無線通信デバイス１０のみを接続対象とすることができる。すなわち、遠方にある意図しない無線通信デバイス１０と接続してしまうことを防止できる。より具体的には、例えば、隣の部屋でたまたま同じタイミングで接続しようとしているときに、こちらの部屋で無線通信装置２０だけを先に起動してしまった場合、隣の部屋の無線通信デバイス１０の電波を受信し、誤って接続してしまう、といった問題が発生することを防止することができる。 In addition to the first condition, the connection control unit 22 further provides a wireless communication device 10 that satisfies the second condition that the radio wave strength (received signal strength) is equal to or higher than the second predetermined value (for example, −90 dBm). It is preferable to select it as the wireless communication device 10 for establishing the connection. By doing so, only the nearby wireless communication device 10 can be connected. That is, it is possible to prevent the connection with an unintended wireless communication device 10 at a distance. More specifically, for example, if only the wireless communication device 20 is started first in this room while trying to connect at the same timing in the next room, the wireless communication device 10 in the next room It is possible to prevent problems such as receiving the radio waves of the above and accidentally connecting.
　また、接続制御部２２は、上記第１条件、及び、第２条件（又は少なくとも第１条件）を満足する状態が所定時間（例えば５秒）以上継続されたことを第３条件とし、第１条件、及び、第２条件（又は少なくとも第１条件）に加えて、さらに、第３条件を満足する無線通信デバイス１０を、接続を確立する無線通信デバイス１０として選択することが好ましい。このようにすれば、例えば、短時間の外乱により、電波強度が一瞬変動して上記第１条件等を満たし、意図しない無線通信デバイス１０と接続してしまうことを防止することができる。 Further, the connection control unit 22 sets that the state satisfying the first condition and the second condition (or at least the first condition) is continued for a predetermined time (for example, 5 seconds) or more, and the first condition is the first condition. In addition to the conditions and the second condition (or at least the first condition), it is preferable to further select the wireless communication device 10 that satisfies the third condition as the wireless communication device 10 for establishing the connection. By doing so, for example, it is possible to prevent the radio wave strength from being momentarily fluctuated due to a short-time disturbance, satisfying the first condition and the like, and being connected to an unintended wireless communication device 10.
　より具体的には、例えば、図５に示したように、無線通信装置２０から等距離に複数台（図５の例では２台）の無線通信デバイス１０Ａ、１０Ｂが存在し、ほぼ同じ電波強度のため、いずれとも接続されていない状態にあるときに、一方の無線通信デバイス１０Ａと無線通信装置２０との間を人が通過すると、電波が遮られることにより、一方の無線通信デバイス１０Ａの電波強度が一瞬低下する。そのため、第１条件を満たしてしまい、他方の無線通信デバイス１０Ｂと接続されてしまうおそれがある。この場合、上記第３条件を設けることにより、このような意図しない無線通信デバイス１０Ｂと接続してしまうことを防止することができる。 More specifically, for example, as shown in FIG. 5, there are a plurality of (two in the example of FIG. 5) wireless communication devices 10A and 10B at equal distances from the wireless communication device 20, and the radio wave intensities are substantially the same. Therefore, if a person passes between one of the wireless communication devices 10A and the wireless communication device 20 while neither is connected, the radio waves are blocked and the radio waves of the one wireless communication device 10A are blocked. The strength drops for a moment. Therefore, the first condition may be satisfied and the wireless communication device 10B may be connected to the other wireless communication device 10B. In this case, by providing the third condition, it is possible to prevent the connection with such an unintended wireless communication device 10B.
　また、接続制御部２２は、電波強度（受信信号強度）の変動率又は変動幅が所定のしきい値（例えば５％又は３ｄＢｍ）以下であることを第４条件とし、第１条件、第２条件、及び、第３条件（少なくとも第１条件）に加えて、さらに、第４条件を満足する無線通信デバイス１０を、接続を確立する無線通信デバイス１０として選択することが好ましい。このようにすれば、例えば、無線通信デバイス１０を装着した人が無線通信装置２０の近くを通過する等した場合に、誤って接続してしまうことを防ぐことができる。 Further, the connection control unit 22 has a fourth condition that the fluctuation rate or fluctuation range of the radio wave strength (received signal strength) is equal to or less than a predetermined threshold value (for example, 5% or 3 dBm), and the first condition and the second condition. In addition to the conditions and the third condition (at least the first condition), it is preferable to further select the wireless communication device 10 that satisfies the fourth condition as the wireless communication device 10 for establishing the connection. By doing so, for example, when a person wearing the wireless communication device 10 passes near the wireless communication device 20, it is possible to prevent accidental connection.
　より具体的には、例えば、図６に示したように、無線通信装置２０から等距離に複数台（図６の例では２台）の無線通信デバイス１０Ａ、１０Ｂが存在し、ほぼ同じ電波強度のため、いずれとも接続されない状態にあるときに、無線通信デバイス１０Ｃを装着した患者が近くを通過すると、接近時にその無線通信デバイス１０Ｃの電波強度が突出して強くなることにより、誤って無線通信デバイス１０Ｃと接続されてしまうおそれがある。例えば、歩いている患者に装着された無線通信デバイス１０Ｃの電波強度は、患者の移動に伴い時々刻々と変化するため、すなわち、電波強度の変化率等が所定のしきい値以下に留まらないため、上記第４条件を設けることにより、このような意図しない無線通信デバイス１０Ｃと接続してしまうことを防止することができる。 More specifically, for example, as shown in FIG. 6, there are a plurality of (two in the example of FIG. 6) wireless communication devices 10A and 10B at equal distances from the wireless communication device 20, and the radio wave intensities are substantially the same. Therefore, if a patient wearing the wireless communication device 10C passes nearby while the wireless communication device 10C is not connected to any of them, the radio wave strength of the wireless communication device 10C becomes prominent and strong at the time of approaching, thereby erroneously increasing the radio wave communication device. There is a risk of being connected to 10C. For example, the radio field strength of the wireless communication device 10C attached to a walking patient changes from moment to moment as the patient moves, that is, the rate of change in radio field strength does not stay below a predetermined threshold value. By providing the above-mentioned fourth condition, it is possible to prevent the connection with such an unintended wireless communication device 10C.
　さらに、接続制御部２２は、第１条件、第２条件、第３条件、及び、第４条件（又は少なくとも第１条件）を満足しているか否かの判定を繰り返して実行し、選択して接続を確立する無線通信デバイス１０を追加することが好ましい。このようにすれば、意図しない無線通信デバイス１０との接続を防止しつつ、複数の無線通信デバイス１０と接続することができる。 Further, the connection control unit 22 repeatedly executes and selects whether or not the first condition, the second condition, the third condition, and the fourth condition (or at least the first condition) are satisfied. It is preferable to add the wireless communication device 10 that establishes the connection. By doing so, it is possible to connect to a plurality of wireless communication devices 10 while preventing an unintended connection to the wireless communication device 10.
　一方、接続制御部２２は、第１条件、第２条件、第３条件、及び、第４条件（又は少なくとも第１条件）が満足されない場合には、いずれの無線通信デバイス１０も選択（接続）しない。 On the other hand, the connection control unit 22 selects (connects) any of the wireless communication devices 10 when the first condition, the second condition, the third condition, and the fourth condition (or at least the first condition) are not satisfied. do not do.
　ここで、例えば、図４に示した例では、無線通信デバイス１０Ａの電波強度が－５５ｄＢｍであり、無線通信デバイス１０Ｂの電波強度が－５０ｄＢｍであり、無線通信デバイス１０Ｃの電波強度が－５５ｄＢｍであるため、接続制御部２２は、いずれの無線通信デバイス１０Ａ、１０Ｂ、１０Ｃも選択（接続）しない。 Here, for example, in the example shown in FIG. 4, the radio wave strength of the wireless communication device 10A is −55 dBm, the radio wave strength of the wireless communication device 10B is −50 dBm, and the radio wave strength of the wireless communication device 10C is −55 dBm. Therefore, the connection control unit 22 does not select (connect) any of the wireless communication devices 10A, 10B, and 10C.
　ただし、接続制御部２２は、電波が受信された無線通信デバイス１０が一つである場合には、当該無線通信デバイス１０を、接続を確立する無線通信デバイス１０として選択することが好ましい。 However, when the connection control unit 22 has only one wireless communication device 10 for which radio waves have been received, it is preferable that the wireless communication device 10 is selected as the wireless communication device 10 for establishing a connection.
　上述したように構成されることにより、複数の無線通信デバイス１０からの電波が受信された場合に、受信された電波の電波強度（受信信号強度）が最も強く、かつ、当該電波強度が次に強い電波強度よりも、所定値以上又は所定割合以上強いという第１条件を満足する無線通信デバイス１０が、接続を確立する無線通信デバイス１０として選択され、接続される。そして、無線通信デバイス（貼付型生体センサ）１０から無線で送信されるデジタルデータの生体情報が受信され、受信された生体情報が、データ処理されるとともに、外部の生体情報モニタ（ベッドサイドモニタ）１００に適合したアナログデータに変換される（変換部２３）。そして、接続部２４を介して有線で出力される。 With the configuration as described above, when radio waves from a plurality of wireless communication devices 10 are received, the radio wave strength (received signal strength) of the received radio waves is the strongest, and the radio wave strength is next. The wireless communication device 10 that satisfies the first condition of being stronger than the strong radio wave intensity by a predetermined value or more or a predetermined ratio or more is selected and connected as the wireless communication device 10 for establishing the connection. Then, the biometric information of the digital data transmitted wirelessly from the wireless communication device (attached biosensor) 10 is received, the received biometric information is processed into data, and an external biometric information monitor (bedside monitor) is used. It is converted into analog data conforming to 100 (conversion unit 23). Then, it is output by wire via the connection unit 24.
　以上、詳細に説明したように、本実施形態によれば、複数の無線通信デバイス１０からの電波が受信された場合に、当該複数の無線通信デバイス１０の中から、他の無線通信デバイス１０よりも明らかに電波強度（受信信号強度）が強い無線通信デバイス１０が選択され、接続される。そのため、意図しない無線通信デバイス１０との接続を防止することができる。 As described above in detail, according to the present embodiment, when radio waves from a plurality of wireless communication devices 10 are received, the other wireless communication device 10 is selected from the plurality of wireless communication devices 10. The wireless communication device 10 having a clearly strong radio wave strength (received signal strength) is selected and connected. Therefore, it is possible to prevent an unintended connection with the wireless communication device 10.
　また、本実施形態によれば、接続を確立するためにユーザは、例えば、無線通信デバイス１０を無線通信装置２０の近傍に持って行く（無線通信デバイス１０と無線通信装置２０とを近づける）だけでよく、接続を確立する無線通信デバイス１０を選択するために、例えばディスプレイや選択スイッチ等の専用の部品等を新たに追加することを要しない。 Further, according to the present embodiment, in order to establish a connection, the user simply brings the wireless communication device 10 in the vicinity of the wireless communication device 20 (closes the wireless communication device 10 and the wireless communication device 20), for example. In order to select the wireless communication device 10 for establishing the connection, it is not necessary to newly add a dedicated component such as a display or a selection switch.
　その結果、本実施形態によれば、専用の部品等を新たに追加することなく（すなわち、コストアップを伴うことなく）、意図しない無線通信デバイス１０との接続を防止することが可能となる。特に、表示装置等を有しない変換アダプタ２０において当該効果が発揮される。 As a result, according to the present embodiment, it is possible to prevent an unintended connection with the wireless communication device 10 without adding a new dedicated component or the like (that is, without increasing the cost). In particular, the effect is exhibited in the conversion adapter 20 which does not have a display device or the like.
　また、本実施形態によれば、上記第１条件に加えて、さらに、電波強度（受信信号強度）が第２所定値以上であることという第２条件を満足する無線通信デバイス１０が、接続を確立する無線通信デバイス１０として選択される。そのため、近傍の無線通信デバイス１０のみを接続対象とすることができる。すなわち、遠方にある意図しない無線通信デバイス１０と接続されてしまうことを防止できる。 Further, according to the present embodiment, in addition to the first condition, the wireless communication device 10 satisfying the second condition that the radio wave strength (received signal strength) is equal to or higher than the second predetermined value makes a connection. It is selected as the wireless communication device 10 to be established. Therefore, only the nearby wireless communication device 10 can be connected. That is, it is possible to prevent the device from being connected to an unintended wireless communication device 10 in a distant place.
　また、本実施形態によれば、上記第１条件、及び、第２条件（又は少なくとも第１条件）を満足する状態が所定時間以上継続されたことを第３条件とし、第１条件、及び、第２条件（又は少なくとも第１条件）に加えて、さらに、第３条件を満足する無線通信デバイス１０が、接続を確立する無線通信デバイス１０として選択される。そのため、例えば、短時間の外乱により、電波強度が一瞬変動して上記第１条件等を満たし、意図しない無線通信デバイス１０と接続されてしまうことを防止することができる。 Further, according to the present embodiment, the third condition is that the state of satisfying the first condition and the second condition (or at least the first condition) is continued for a predetermined time or more, and the first condition and the first condition are satisfied. In addition to the second condition (or at least the first condition), the wireless communication device 10 satisfying the third condition is further selected as the wireless communication device 10 for establishing the connection. Therefore, for example, it is possible to prevent the radio wave strength from fluctuating momentarily due to a short-time disturbance, satisfying the first condition and the like, and being connected to an unintended wireless communication device 10.
　また、本実施形態によれば、電波強度（受信信号強度）の変動率又は変動幅が所定のしきい値以下であることを第４条件とし、第１条件、第２条件、及び、第３条件（少なくとも第１条件）に加えて、さらに、第４条件を満足する無線通信デバイス１０が、接続を確立する無線通信デバイス１０として選択される。そのため、例えば、無線通信デバイス１０を装着した人が無線通信装置２０の近くを通過する等した場合などに、誤って接続されてしまうことを防ぐことができる。 Further, according to the present embodiment, the fourth condition is that the fluctuation rate or fluctuation range of the radio wave strength (received signal strength) is equal to or less than a predetermined threshold value, and the first condition, the second condition, and the third condition are satisfied. In addition to the condition (at least the first condition), the wireless communication device 10 satisfying the fourth condition is further selected as the wireless communication device 10 for establishing the connection. Therefore, for example, when a person wearing the wireless communication device 10 passes near the wireless communication device 20, it is possible to prevent accidental connection.
　さらに、本実施形態によれば、第１条件、第２条件、第３条件、及び、第４条件（又は少なくとも第１条件）を満足しているか否かの判定が繰り返して実行され、選択されて接続される無線通信デバイス１０が追加される。そのため、意図しない無線通信デバイス１０との接続を防止しつつ、複数の無線通信デバイス１０と接続することが可能となる。 Further, according to the present embodiment, the determination of whether or not the first condition, the second condition, the third condition, and the fourth condition (or at least the first condition) are satisfied is repeatedly executed and selected. The wireless communication device 10 to be connected is added. Therefore, it is possible to connect to a plurality of wireless communication devices 10 while preventing an unintended connection to the wireless communication device 10.
　以上、本発明の実施の形態について説明したが、本発明は、上記実施形態に限定されるものではなく種々の変形が可能である。例えば、上記実施形態では、無線通信装置２０が変換アダプタである場合を例にして説明したが、無線通信装置２０は、例えば、体温測定などのアプリケーションソフトがインストールされたスマートフォンであってもよい。無線通信装置２０としてスマートフォンを用いる場合、図７に示されるように、例えば、Ｂｌｕｅｔｏｏｔｈ（登録商標）、ＢＬＥ（Ｂｌｕｅｔｏｏｔｈ（登録商標）　Ｌｏｗ　Ｅｎｅｒｇｙ）、ＷｉＦｉ、赤外線通信、ＮＦＣ（Ｎｅａｒ　Ｆｉｅｌｄ　Ｃｏｍｍｕｎｉｃａｔｉｏｎ）等の無線通信で無線通信デバイス（貼付型生体センサ）１０と通信し、その測定データを取得して、画面に表示する。さらに、無線通信装置２０は、例えば、ノード（中継器）等であってもよい。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways. For example, in the above embodiment, the case where the wireless communication device 20 is a conversion adapter has been described as an example, but the wireless communication device 20 may be, for example, a smartphone in which application software such as body temperature measurement is installed. When a smartphone is used as the wireless communication device 20, as shown in FIG. 7, for example, Bluetooth (registered trademark), BLE (Bluetooth (registered trademark) Low Energy), WiFi, infrared communication, NFC (Near Field Communication), etc. It communicates with the wireless communication device (paste type biosensor) 10 by wireless communication, acquires the measurement data, and displays it on the screen. Further, the wireless communication device 20 may be, for example, a node (repeater) or the like.
　また、無線通信部２１が、無線通信デバイス（貼付型生体センサ）１０に対し、無線通信を用いて情報（例えば、無線通信デバイス１０との接続確認情報）を送信する構成としてもよい。この場合、例えば、接続確認スイッチ（プッシュスイッチ）を押すことにより、接続確認コマンドが送信され、無線で接続されている（ペアリングされている）無線通信デバイス１０のＬＥＤが点灯又は点滅する。なお、ＬＥＤの点灯又は点滅に代えて、振動したり、ブザーがなるようにしてもよい。本変形例によれば、複数の無線通信デバイス１０が存在する場合に、接続確認情報を受けて、無線通信デバイス１０側が発光すること、又は、音を出すことなどによって、接続対象を確認することができる。 Further, the wireless communication unit 21 may be configured to transmit information (for example, connection confirmation information with the wireless communication device 10) to the wireless communication device (attached biosensor) 10 by using wireless communication. In this case, for example, by pressing the connection confirmation switch (push switch), a connection confirmation command is transmitted, and the LED of the wirelessly connected (paired) wireless communication device 10 lights up or blinks. Instead of lighting or blinking the LED, it may vibrate or buzzer. According to this modification, when a plurality of wireless communication devices 10 exist, the connection target is confirmed by receiving the connection confirmation information and causing the wireless communication device 10 side to emit light or make a sound. Can be done.
　さらに、無線通信部２１が、複数の異なる無線通信方式の無線通信に対応可能に構成されていてもよい。より具体的には、例えば、複数の無線通信部（無線通信ドライバ）２１を備える構成としてもよい。この場合、複数の無線通信部（無線通信ドライバ）２１は、例えば、ＢＬＥ（Ｂｌｕｅｔｏｏｔｈ（登録商標）　Ｌｏｗ　Ｅｎｅｒｇｙ）、ＷｉＦｉ、ＬＴＥ（Ｌｏｎｇ　Ｔｅｒｍ　Ｅｖｏｌｕｔｉｏｎ）、サブギガ（９００ＭＨｚ帯）などの無線通信方式（無線通信規格）、及び、ＮＦＣ（Ｎｅａｒ　Ｆｉｅｌｄ　Ｃｏｍｍｕｎｉｃａｔｉｏｎ）（ＩＳＯ／ＩＥＣ　１８０９２）や、ＭＩＦＡＲＥ（登録商標）（ＩＳＯ／ＩＥＣ　１４４４３）などの無線通信方式（無線通信規格）を採用することが好ましい。本変形例によれば、一つの無線通信装置（変換アダプタ）２０で、様々な異なる通信ドライバを持つ無線通信デバイス１０と接続することができるため、汎用的に様々なセンサ情報を媒介することができる。 Further, the wireless communication unit 21 may be configured to support wireless communication of a plurality of different wireless communication methods. More specifically, for example, the configuration may include a plurality of wireless communication units (wireless communication drivers) 21. In this case, the plurality of wireless communication units (wireless communication drivers) 21 may use wireless communication methods (wireless) such as BLE (Bluetooth (registered trademark) Low Energy), WiFi, LTE (Long Term Evolution), and subgiga (900 MHz band). Communication standard), and it is preferable to adopt a wireless communication method (wireless communication standard) such as NFC (Near Field Communication) (ISO / IEC 18092) or MIFARE (registered trademark) (ISO / IEC 14443). According to this modification, one wireless communication device (conversion adapter) 20 can be connected to a wireless communication device 10 having various different communication drivers, so that various sensor information can be transmitted for general purposes. can.
　１　無線通信システム
　１０、１０Ａ、１０Ｂ、１０Ｃ　無線通信デバイス（貼付型生体センサ）
　２０　無線通信装置（変換アダプタ／スマートフォン／中継器）
　２１　無線通信部
　２２　接続制御部
　１００　生体情報モニタ 1 Wireless communication system 10, 10A, 10B, 10C Wireless communication device (paste type biosensor)
20 Wireless communication device (conversion adapter / smartphone / repeater)
21 Wireless communication unit 22 Connection control unit 100 Biometric information monitor

Claims (10)

  1. 　無線通信デバイスと接続を確立して無線通信を行う無線通信装置であって、
    　前記無線通信デバイスとの間で電波を送受信する無線通信部と、
    　複数の無線通信デバイスからの電波が受信された場合に、当該複数の無線通信デバイスの中から接続する無線通信デバイスを選択する接続制御部と、を備え、
    　前記接続制御部は、前記無線通信部により受信された電波の電波強度が最も強く、かつ、当該電波強度が次に強い電波強度よりも所定値以上又は所定割合以上強いという第１条件を満足する無線通信デバイスを、接続を確立する無線通信デバイスとして選択することを特徴とする無線通信装置。     A wireless communication device that establishes a connection with a wireless communication device and performs wireless communication.
    A wireless communication unit that transmits and receives radio waves to and from the wireless communication device,
    A connection control unit that selects a wireless communication device to be connected from among the plurality of wireless communication devices when radio waves from a plurality of wireless communication devices are received is provided.
    The connection control unit satisfies the first condition that the radio wave strength of the radio wave received by the wireless communication unit is the strongest and the radio wave strength is stronger than a predetermined value or a predetermined ratio than the next strongest radio wave strength. A wireless communication device comprising selecting a wireless communication device as a wireless communication device for establishing a connection.
  2. 　前記接続制御部は、前記第１条件に加えて、さらに、電波強度が第２所定値以上であることという第２条件を満足する無線通信デバイスを選択することを特徴とする請求項１に記載の無線通信装置。 The first aspect of the present invention is characterized in that, in addition to the first condition, the connection control unit further selects a wireless communication device that satisfies the second condition that the radio wave strength is a second predetermined value or more. Wireless communication device.
  3. 　前記接続制御部は、少なくとも前記第１条件を満足する状態が所定時間以上継続されることを第３条件とし、少なくとも前記第１条件に加えて、さらに、前記第３条件を満足する無線通信デバイスを選択することを特徴とする請求項１又は２に記載の無線通信装置。 The connection control unit has a third condition that the state satisfying at least the first condition is continued for a predetermined time or more, and in addition to at least the first condition, a wireless communication device further satisfying the third condition. The wireless communication device according to claim 1 or 2, wherein the wireless communication device is selected.
  4. 　前記接続制御部は、電波強度の変動率又は変動幅が所定のしきい値以下であることを第４条件とし、少なくとも前記第１条件に加えて、さらに、前記第４条件を満足する無線通信デバイスを選択することを特徴とする請求項１～３のいずれか１項に記載の無線通信装置。 The connection control unit has a fourth condition that the fluctuation rate or fluctuation range of the radio wave strength is equal to or less than a predetermined threshold value, and in addition to at least the first condition, wireless communication that further satisfies the fourth condition. The wireless communication device according to any one of claims 1 to 3, wherein the device is selected.
  5. 　前記接続制御部は、少なくとも前記第１条件を満足しているか否かの判定を繰り返して実行し、選択して接続を確立する無線通信デバイスを追加することを特徴とする請求項１～４のいずれか１項に記載の無線通信装置。 The connection control unit is characterized in that it repeatedly executes determination of whether or not at least the first condition is satisfied, and adds a wireless communication device that selects and establishes a connection. The wireless communication device according to any one of the following items.
  6. 　前記接続制御部は、少なくとも前記第１条件が満足されない場合には、いずれの無線通信デバイスも選択しないことを特徴とする請求項１～５のいずれか１項に記載の無線通信装置。 The wireless communication device according to any one of claims 1 to 5, wherein the connection control unit does not select any wireless communication device when at least the first condition is not satisfied.
  7. 　前記接続制御部は、電波が受信された無線通信デバイスが一つである場合には、当該無線通信デバイスを選択することを特徴とする請求項１～６のいずれか１項に記載の無線通信装置。 The wireless communication according to any one of claims 1 to 6, wherein the connection control unit selects the wireless communication device when there is only one wireless communication device for which radio waves have been received. Device.
  8. 　請求項１～７のいずれか１項に記載の無線通信装置と、
    　前記無線通信デバイスと、を備えることを特徴とする無線通信システム。     The wireless communication device according to any one of claims 1 to 7.
    A wireless communication system including the wireless communication device.
  9. 　前記無線通信デバイスは、生体に貼り付けられて用いられ、生体の生体情報を測定し、測定データを無線で送信する貼付型生体センサであることを特徴とする請求項８に記載の無線通信システム。 The wireless communication system according to claim 8, wherein the wireless communication device is a stick-on biosensor that is attached to a living body and used to measure biological information of the living body and transmit the measurement data wirelessly. ..
  10. 　前記無線通信装置は、無線で受信したデジタルデータをアナログデータに変換して有線で出力する変換アダプタであることを特徴とする請求項８又は９に記載の無線通信システム。 The wireless communication system according to claim 8 or 9, wherein the wireless communication device is a conversion adapter that converts digital data received wirelessly into analog data and outputs the data by wire.
PCT/JP2021/044237 2020-12-22 2021-12-02 Wireless communication device and wireless communication system WO2022138042A1 (en)

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* Cited by examiner, † Cited by third party
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JP2012081271A (en) * 2003-06-20 2012-04-26 Smiths Medical Pm Inc Oximetry simulator
JP2016539731A (en) * 2013-12-12 2016-12-22 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． Automatic real-time change to size of patient data display
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