WO2022151832A1 - Procédé et appareil de commande pour dispositif iot, étiquette uwb et dispositif terminal - Google Patents

Procédé et appareil de commande pour dispositif iot, étiquette uwb et dispositif terminal Download PDF

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Publication number
WO2022151832A1
WO2022151832A1 PCT/CN2021/130923 CN2021130923W WO2022151832A1 WO 2022151832 A1 WO2022151832 A1 WO 2022151832A1 CN 2021130923 W CN2021130923 W CN 2021130923W WO 2022151832 A1 WO2022151832 A1 WO 2022151832A1
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WIPO (PCT)
Prior art keywords
uwb
iot device
target
uwb tag
target channel
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PCT/CN2021/130923
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English (en)
Chinese (zh)
Inventor
张烨
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Oppo广东移动通信有限公司
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Publication of WO2022151832A1 publication Critical patent/WO2022151832A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16Y—INFORMATION AND COMMUNICATION TECHNOLOGY SPECIALLY ADAPTED FOR THE INTERNET OF THINGS [IoT]
    • G16Y40/00—IoT characterised by the purpose of the information processing
    • G16Y40/30—Control
    • G16Y40/35—Management of things, i.e. controlling in accordance with a policy or in order to achieve specified objectives
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the technical field of UWB, and in particular, to a control method and device for an Internet of Things (Internet of Things, IoT) device, an Ultra Wide Band (Ultra Wide Band, UWB) tag, and a terminal device.
  • Internet of Things Internet of Things, IoT
  • Ultra Wide Band Ultra Wide Band
  • UWB technology is a wireless carrier communication technology. It does not use sinusoidal carriers, but uses nanosecond non-sinusoidal narrow pulses to transmit data. Therefore, it occupies a wide spectrum range, and the data transmission rate can reach hundreds of megabytes. bits per second or more.
  • UWB technology has the advantages of low system complexity, low power spectral density of transmitted signals, insensitivity to channel fading, low interception capability, and high positioning accuracy. It is especially suitable for high-speed wireless access in dense multipath places such as indoors.
  • Embodiments of the present application provide a control method, device, UWB tag, and terminal device for an IoT device.
  • the technical solution is as follows:
  • an embodiment of the present application provides a method for controlling an IoT device, the method is used for a UWB tag, and the method includes:
  • the terminal device In response to the target channel being idle, sending a data frame on the target channel, so that the terminal device determines the IoT device represented by the UWB tag according to the data frame, and controls the IoT device;
  • the target channel In response to the target channel being occupied, the target channel is listened again after a random delay time.
  • an embodiment of the present application provides a method for controlling an IoT device, the method is used for a terminal device, and the method includes:
  • the target IoT device is controlled.
  • an embodiment of the present application provides a control apparatus for an IoT device, and the apparatus includes:
  • the listening module is used to listen to the target channel in the working state
  • a data frame sending module configured to send a data frame on the target channel in response to the target channel being idle, so that the terminal device determines the IoT device represented by the UWB tag according to the data frame, and controls the IoT device ;
  • the listening module is further configured to listen to the target channel again after a random delay time in response to the target channel being occupied.
  • an embodiment of the present application provides a control apparatus for an IoT device, and the apparatus includes:
  • a data frame receiving module configured to receive data frames sent by each UWB tag on the target channel, where the data frame is sent by the UWB tag when the target channel is idle;
  • a device determination module configured to determine a target IoT device from the IoT devices represented by each of the UWB tags based on the data frame;
  • the control module is used to control the target IoT device.
  • an embodiment of the present application provides a UWB tag
  • the UWB tag includes: a microprocessor and a UWB transceiver;
  • the microprocessor is electrically connected to the UWB transceiver
  • the UWB transceiver is used to perform the following steps under the control of the microprocessor:
  • the terminal device In response to the target channel being idle, sending a data frame on the target channel, so that the terminal device determines the IoT device represented by the UWB tag according to the data frame, and controls the IoT device;
  • the target channel In response to the target channel being occupied, the target channel is listened again after a random delay time.
  • an embodiment of the present application provides a terminal device, where the terminal device includes: a processor, a memory, and a UWB component;
  • the processor is electrically connected to the memory and the UWB component, respectively;
  • the UWB component is used to send and receive data on the target channel
  • the memory stores at least one instruction for execution by the processor to perform the following steps:
  • the target IoT device is controlled.
  • an embodiment of the present application provides an IoT device control system, the system includes: a terminal device, a UWB tag, and an IoT device;
  • the terminal device is used to implement the method for controlling an IoT device on the terminal device side as described in the above aspect
  • the UWB tag is used to implement the method for controlling the IoT device on the UWB tag side as described in the above aspects.
  • an embodiment of the present application provides a computer-readable storage medium, where at least one piece of program code is stored in the computer-readable storage medium, and the program code is loaded and executed by a processor to implement the above aspects.
  • an embodiment of the present application provides a computer program product or computer program, where the computer program product or computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium.
  • the processor of the terminal device or the UWB tag reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the terminal device or the UWB tag executes the IoT device provided in the various optional implementations of the above aspects. Control Method.
  • FIG. 1 shows a schematic diagram of an implementation environment of an exemplary embodiment of the present application
  • FIG. 2 is a flowchart of a control method for an IoT device provided by an exemplary embodiment of the present application
  • Fig. 3 is the implementation schematic diagram of UWB label sending data frame process
  • FIG. 4 is a flowchart of a method for controlling an IoT device provided by another exemplary embodiment of the present application.
  • FIG. 5 is a sequence diagram of a process of sending data frames by multiple UWB tags according to an exemplary embodiment of the present application
  • FIG. 6 is a flowchart of a method for controlling an IoT device provided by another exemplary embodiment of the present application.
  • FIG. 7 is a flowchart of a control method for an IoT device provided by another exemplary embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an antenna in a UWB assembly shown in an exemplary embodiment of the present application.
  • FIG. 9 is a working sequence diagram of a UWB component and a plurality of UWB tags shown in an exemplary embodiment of the present application.
  • FIG. 10 is a schematic diagram of a process of measuring a horizontal direction angle by a horizontal antenna group according to an exemplary embodiment of the present application.
  • FIG. 11 is a schematic diagram of a process for determining the spatial positional relationship between a terminal device and a UWB tag according to an exemplary embodiment of the present application
  • FIG. 12 is a schematic diagram of a tag binding state and a data interaction process in a working state shown in an exemplary embodiment of the present application;
  • FIG. 13 shows a structural block diagram of an apparatus for controlling an IoT device provided by an embodiment of the present application
  • FIG. 14 shows a structural block diagram of a control apparatus for an IoT device provided by an embodiment of the present application
  • FIG. 15 shows a structural block diagram of a terminal device provided by an exemplary embodiment of the present application.
  • FIG. 16 shows a structural block diagram of a UWB tag provided by an exemplary embodiment of the present application
  • FIG. 17 shows a block diagram of the structure of an IoT device control system provided by an exemplary embodiment of the present application.
  • FIG. 1 shows a schematic diagram of an implementation environment of an exemplary embodiment of the present application, where the implementation environment includes a terminal device 110 , at least one IoT device 120 and a UWB tag 130 .
  • the terminal device 110 is a device with a spatial location awareness capability, and the spatial location awareness capability means that the terminal device 110 can perceive the spatial location relationship of other devices.
  • the terminal device 110 may be a portable electronic device such as a smart phone, a tablet computer, a smart remote control, and a smart watch.
  • the spatial location awareness capability of the terminal device 110 is realized by means of UWB components and UWB tags 130 representing IoT devices.
  • the terminal device 110 can perform UWB communication with the UWB tag 130 through the UWB component, that is, the terminal device 110 can receive the data frame sent by the UWB tag 130 on the target channel through the UWB component, and determine according to the data frame sent by the UWB tag 130.
  • the spatial positional relationship between the terminal device 110 and the UWB tag 130 is realized by means of UWB components and UWB tags 130 representing IoT devices.
  • the UWB component can be separated from the terminal device 130, or the UWB component is independent of the terminal device 130, that is, when the terminal device 110 is equipped with the UWB component, it has the function of performing UWB communication with the UWB tag 130; When equipped with UWB components, the terminal device 110 may not be able to perform UWB communication with the UWB tag 130 .
  • the UWB component can be packaged as a terminal accessory, for example, the UWB component can be a terminal accessory such as a mobile phone case, a mobile phone protective cover, and a mobile phone ornament.
  • the UWB component can also be set inside the terminal device 110 , that is, the terminal device 110 has a built-in UWB component, so that the terminal device 110 can perform UWB communication with the UWB tag 130 through the UWB component.
  • the IoT device 120 is an electronic device that can establish a data communication connection with the terminal device 110, which can be a smart TV 122, a smart speaker 121, a smart door lock 123, a smart refrigerator, a smart air conditioner, a smart lamp, a car air conditioner, and other devices.
  • the above data communication connection means that the IoT device 120 and the terminal device 110 can exchange information through a data communication connection, and the data communication connection may be a WiFi connection, a Bluetooth connection, an infrared connection, etc., which is not limited in this embodiment of the present application.
  • the UWB tag 130 is used to represent the IoT device 120 , and the UWB tag 130 is independent of the IoT device 120 .
  • Independent means that the UWB tag 130 is a device independent of the IoT device 120 and can be sold separately as a product, rather than being integrated into the IoT device 120 as a part of the IoT device 120, nor a necessary component of the IoT device 120.
  • the UWB tag 130 and the IoT device 120 do not have a data communication connection relationship, but only have a mapping relationship, and the mapping relationship refers to the IoT device 120 represented by the UWB tag 130. As shown in FIG.
  • the UWB tag 131 is used to characterize the IoT device 121
  • the UWB tag 132 is used to characterize the IoT device 122
  • the UWB tag 132 is used to characterize the IoT device 123 .
  • the UWB tag 130 is provided with an independent power supply, and the independent power supply is a replaceable power supply, a non-replaceable power supply or a rechargeable power supply; in another possible design, the UWB The tag 130 is powered by the IoT device 120 (but does not perform data communication), and the power supply method of the IoT device 120 includes wired power supply (such as through a charging cable) or wireless power supply (such as through a wireless charging coil).
  • the UWB tag 130 in the working state, sends a data frame to the terminal device 110 on the target channel. After receiving the data frame on the target channel, the terminal device 110 determines the IoT device 120 represented by the UWB tag 130, and establishes a data communication connection with the IoT device 120, thereby controlling the IoT device 120 through the data communication connection.
  • a data frame is sent on the target channel, so that the terminal device can determine the IoT device represented by the UWB tag according to the data frame, and control the IoT device; or
  • the target channel In response to the target channel being occupied, the target channel is listened again after a random delay period.
  • the method further includes:
  • determine the random delay duration including:
  • the random delay duration is determined based on the number of listening times, and the number of listening times is used to indicate the number of times of listening to the target channel before sending the data frame;
  • the methods include:
  • determine the random delay duration based on the number of interceptions including:
  • the delay duration range is determined based on the number of interceptions, wherein the delay duration range is positively correlated with the number of interceptions;
  • the listening mode of the target channel includes at least one of energy detection and carrier detection.
  • the data frame contains the tag identifier
  • the terminal device stores the mapping relationship between the UWB tag and the IoT device. control.
  • the data frame includes the device identifier of the IoT device, and the terminal device is used to control the IoT device based on the device identifier.
  • the method also includes:
  • the first binding information sent by the terminal device is received on the target channel, and the first binding information includes the label identifier of the UWB label and the device identifier of the IoT device bound to the UWB label;
  • the data frame contains the device identifier and location information of the IoT device
  • the terminal device is used to control the IoT device based on the device identifier and location information
  • the location information is used to indicate the location of the UWB tag, or, used to indicate The location of the IoT device.
  • the method also includes:
  • the second binding information sent by the terminal device is received on the target channel, and the second binding information includes the label identifier of the UWB tag, the device identifier of the IoT device bound to the UWB tag, and the location information;
  • the target IoT device is determined from the IoT devices represented by each UWB tag;
  • the spatial position relationship between the terminal device and each UWB tag Based on the data frame, determine the spatial position relationship between the terminal device and each UWB tag, and the spatial position relationship includes a horizontal direction angle and a vertical direction angle;
  • the UWB tag pointed to by the terminal device is determined as the target UWB tag
  • the IoT device represented by the target UWB tag is determined as the target IoT device.
  • receive data frames sent by each UWB tag on the target channel including:
  • the data frames sent by each UWB tag are alternately received on the target channel through the first antenna group and the second antenna group, and the first antenna group and the second antenna group correspond to different directions;
  • the vertical direction angle between the terminal device and each UWB tag is determined.
  • determine the UWB tag pointed to by the terminal device as the target UWB tag including:
  • a UWB tag whose horizontal direction angle with the terminal device is within the horizontal angle range and whose vertical direction angle with the terminal device is within the vertical angle range is determined as the target UWB tag.
  • the IoT device represented by the target UWB tag is determined as the target IoT device, including:
  • the target IoT device is determined from the mapping relationship between UWB tags and IoT devices.
  • the method also includes:
  • a mapping relationship between the label identifier and the device identifier corresponding to the IoT device is established.
  • the method also includes:
  • mapping relationship indicated by the UWB tag is deleted.
  • the IoT device represented by the target UWB tag is determined as the target IoT device, including:
  • the IoT device corresponding to the device ID is determined as the target IoT device.
  • the method also includes:
  • first binding information is sent to the UWB tag in the bound state on the target channel, where the first binding information includes the tag identification of the UWB tag and the device identification of the IoT device bound to the UWB tag , so that the UWB tag stores the device identification;
  • the second binding information is sent to the UWB tag in the binding state on the target channel, where the second binding information includes the tag identification of the UWB tag and the device identification of the IoT device bound to the UWB tag, and location information, so that the UWB tag stores the device identification and location information, and the location information is used to indicate the location of the UWB tag, or to indicate the location of the IoT device.
  • FIG. 2 shows a flowchart of a method for controlling an IoT device provided by an exemplary embodiment of the present application.
  • the embodiment of the present application is described by taking the method applied to the UWB tag shown in FIG. 1 as an example. include:
  • Step 201 in the working state, listen to the target channel.
  • the working state refers to the state of the UWB tag after the UWB tag is bound to the represented IoT device.
  • the UWB tag in the working state, can be affixed to the characterized IoT device, or the UWB tag can be placed near the characterized IoT device, or the UWB tag can be placed away from the characterized IoT device.
  • the embodiment does not limit the setting position of the UWB label in the working state.
  • the UWB tag before the UWB tag sends a data frame on the target channel, it first needs to listen to the target channel, so as to determine the channel state of the target channel.
  • the UWB tag executes the following step 202; when the channel state of the target channel is occupied (ie, occupied), the UWB tag executes the following step 203.
  • the UWB tag listens to the target channel within a backoff time period (for example, 320us), or listens to the target channel at a point in time.
  • a backoff time period for example, 320us
  • the UWB tag turns on the receiver (RX) to listen to the target channel. It should be noted that channel listening is only a monitoring and evaluation of channel status. UWB tags do not need to receive and parse data frames sent by other UWB tags on the target channel, that is, UWB tags can Keep power consumption extremely low.
  • the listening mode adopted by the UWB tag to listen to the target channel includes at least one of energy detection and carrier detection.
  • the energy detection method is used to listen to the target channel, when the energy of the target channel is greater than the energy threshold, it is determined that the target channel is in an occupied state, and when the energy of the target channel is less than the energy threshold, it is determined that the target channel is in an idle state.
  • the carrier detection method is used to listen to the target channel, when there is a carrier signal with a preset frequency on the target channel, it is determined that the target channel is in an occupied state, and when there is no carrier signal with a preset frequency on the target channel, it is determined that the target channel is in an idle state .
  • the UWB tag may use a clear channel assessment (Clear Channel Assessment, CCA) technology to detect whether the target channel is in an idle state.
  • CCA Clear Channel Assessment
  • Step 202 in response to the target channel being idle, send a data frame on the target channel, so that the terminal device determines the IoT device represented by the UWB tag according to the data frame, and controls the IoT device.
  • the UWB tag When the channel state indicates that the target channel is idle, that is, there is no other UWB tag currently sending data frames, the UWB tag sends data frames on the target channel. Among them, the UWB tag transmits data frames on the target channel by broadcasting.
  • the UWB tag turns on the transmitter (TX) for data frame transmission. Moreover, in the process of sending data frames, the UWB tag can turn off the receiver, thereby reducing power consumption.
  • the data frame includes information that can indicate the IoT device represented by the UWB tag.
  • the terminal device receives the data frame sent by the UWB tag on the target channel, and further determines the IoT device represented by the UWB tag according to the information contained in the data frame, thereby realizing the control of the IoT device.
  • Step 203 in response to the target channel being occupied, listen to the target channel again after a random delay time.
  • the channel status indicates that the target channel is occupied, it means that other UWB tags are currently sending data frames on the target channel. If the UWB tag still sends data frames on the target channel, it will cause a data frame conflict. Therefore, when the target channel is occupied, the UWB tag performs random delay, and listens to the target channel again after the random delay time.
  • the UWB tag performs random delay based on the random access (ALOHA) protocol.
  • ALOHA random access
  • the UWB tag turns off the receiver; after the random delay time, the UWB tag turns on the receiver again to perform channel listening.
  • the UWB tag After the UWB tag listens to the target channel again, if the target channel is idle, it will send a data frame on the target channel; if the target channel is still occupied, it will delay again randomly, and listen to the target channel after a random delay time until the target When the channel is idle, the data frame is sent on the target channel.
  • the UWB tag in the working state, the UWB tag first listens to the target channel through RX, and when the target channel is occupied, the UWB tag performs random delay. When the random delay time is reached, the UWB tag listens to the target channel through RX again. When the target channel is idle, the UWB tag sends data frames on the target channel through TX.
  • the UWB tag does not need to be synchronized in advance before working, and does not need to know the existence of the UWB tag in the environment, that is, it is not necessary to pre-specify the time slot (slot) of each UWB tag to send a data frame, and correspondingly, the working state
  • UWB tags do not need to receive data frames sent by other UWB tags on the target channel to send data frames in their own time slots.
  • UWB tags can only be sent but not received in working state.
  • UWB tags can realize dynamic asynchronous access. In the scenario of multiple IoT devices, UWB tags can be accessed at any time and used at any time, which simplifies the control process of IoT devices.
  • the synchronization scheme since the clock cannot be ideally synchronized, a large margin needs to be set.
  • the duration of the data frame sent by the UWB tag is 200us, but the time slot allocated for each UWB tag is 1ms to avoid different Data frame collisions caused by synchronization errors between UWB tags, however, under this scheme, the channel occupancy rate will be affected (the maximum channel occupancy rate in the above example is only 20%), which in turn leads to a higher demand for channel capacity.
  • the channel listening and random delay mechanism since synchronization is not required, there is no need to set a margin for the data frame transmission of the UWB tag, which increases the channel occupancy rate and reduces the demand for channel capacity.
  • the UWB tag in the working state determines the channel state of the target channel by listening to the target channel, and when the target channel is idle, it sends a data frame on the target channel, so that the terminal device can pair the data frame based on the data frame.
  • the IoT device represented by the UWB tag is controlled.
  • UWB tags When the target channel is occupied, the target channel is monitored again after a random delay to avoid data frame collision caused by different UWB tags sending data frames on the target channel at the same time, which is helpful to improve the IoT Accuracy of device control; and, by introducing channel listening and random delay mechanism, UWB tags only send data frames in working state without receiving data frames sent by other UWB tags, that is, without sensing the existence of other UWB tags , which helps to improve the flexibility of UWB tag access and reduces the power consumption of UWB tags.
  • FIG. 4 shows a flowchart of a method for controlling an IoT device provided by another exemplary embodiment of the present application.
  • the method is applied to the UWB tag shown in FIG. Methods include:
  • Step 401 in the working state, listen to the target channel.
  • Step 402 in response to the target channel being idle, send a data frame on the target channel.
  • steps 401 to 402 For the implementation of the foregoing steps 401 to 402, reference may be made to steps 201 to 202, and details are not described herein again in this embodiment.
  • Step 403 enter the sleep state after the data frame is sent.
  • the UWB tag in order to reduce the power consumption of the UWB tag in the working state, the UWB tag enters the sleep state after completing the sending of the data frame.
  • the transceivers of the UWB tag In the dormant state, the transceivers of the UWB tag are all turned off, that is, the UWB tag does not need to continue to monitor the target channel in the dormant state.
  • each UWB tag when four UWB tags are set in the environment, after each UWB tag completes sending the data frame, it immediately enters a dormant state.
  • Step 404 wake up and listen to the target channel in response to the duration of the sleep state reaching the sleep duration.
  • the duration of the sleep state (ie, the sleep duration) after the data frame transmission is completed is preset in the UWB tag, and the sleep duration set by each UWB tag is the same.
  • the sleep duration When the sleep duration is reached, the UWB tag wakes up and enters the working state (ie, releases the sleep state), so as to send data frames in the next cycle.
  • the sleep duration may be 0.5s or 1s, which is not limited in this embodiment of the present application.
  • the UWB tag After waking up, the UWB tag still needs to listen to the target channel and send data frames when the target channel is idle to avoid conflicts with other UWB tags (such as new UWB tags for asynchronous access).
  • each UWB tag wakes up again after reaching the sleep duration, and sends data frames in the next cycle (only the data frame sending process is shown in the figure, and the channel listening process is not shown). ).
  • the UWB tag in the initial working stage of the UWB tag, the UWB tag often senses that the target channel is occupied; and under the action of the channel listening and random delay mechanism, if the UWB tag in the environment remains unchanged, it will change with time. As the working time increases, the data frame sending frequency of each UWB tag will tend to be stable, that is, the UWB tag detects that the target channel is occupied and disappears. conflict. As shown in Figure 5, after working for a period of time, four UWB tags send data frames in an orderly manner.
  • Step 405 in response to the target channel being occupied, determine a random delay time, and enter a sleep state.
  • the UWB tag when the target channel is occupied, the UWB tag enters the sleep state within a random delay time, that is, the transceivers of the UWB tag are all turned off, It is not necessary to continue to listen to the target channel within the random delay time, so as to achieve the effect of reducing power consumption.
  • the UWB tag since the UWB tag is only in the working state during channel listening and data frame transmission, and the duration of channel listening and data frame transmission is extremely short, the UWB tag is in the working state. Most of the time it is in a dormant state, achieving extremely low operating power consumption.
  • the UWB tag determines the random delay duration based on the number of listening times, where the number of listening times is used to indicate the number of times the target channel is monitored before sending the data frame. And, every time after listening to the target channel, the UWB tag will update the listening times (for example, add one); if the target channel is detected to be idle and the data frame is successfully sent, the UWB tag will reset the listening times. When it is detected that the target channel is occupied, the duration of the next random delay is determined based on the updated listening times.
  • the delay time range is first determined based on the number of listening times, and then the delay duration is determined based on the number of listening times. Determine the random delay time in the range.
  • the delay time range is positively correlated with the listening times, that is, the more listening times (indicating that there are more UWB tags in the environment, and the occupancy rate of the target channel is higher), the larger the delay time range, the corresponding , the higher the randomness of the determined random delay time.
  • the delay time range in order to prevent the random delay time from being too large, there is an upper limit on the delay time range, that is, the delay time range will not expand infinitely with the increase of the number of listening times.
  • the delay duration range is a backoff time period (320us) as a unit duration, and the delay duration range is a multiple of the unit duration, and the multiple is positively correlated with the listening times.
  • the delay time range is (23-1) backoff time periods, and the selection range of the random delay time length is 0.32ms to 2.24ms; when the number of listening times is 2, the delay time The duration range is (24-1) backoff time periods, and the selection range of the random delay time is 0.32ms to 4.8ms; when the number of listening times is 3, the delay time range is (25-1) backoff time periods , the selection range of the random delay time is 0.32ms to 9.92ms.
  • Step 406 wake up and listen to the target channel again in response to the duration of the sleep state reaching a random delay time.
  • the UWB tag switches from the sleep state to the working state, and listens to the target channel again. If the target channel is idle, send the data frame on the target channel; if the target channel is still occupied, it will delay again randomly, and listen to the target channel after the random delay time, until the target channel is idle, send the data frame on the target channel Data Frame.
  • the UWB tag enters the dormant state after completing the transmission of the data frame, and enters the dormant state within a random delay time, which further reduces the wake-up time in the working state of the UWB tag. While ensuring the normal transmission of the data frame, The power consumption of the UWB tag is further reduced, and the usage time of the UWB tag is prolonged.
  • the UWB tag dynamically determines the delay duration range based on the number of listening times, and then randomly determines the random delay duration from the delay duration range.
  • the random selection range of the duration can reduce the number of times that the UWB tag repeatedly listens to the target channel and improve the asynchronous access efficiency of the UWB tag.
  • FIG. 6 shows a flowchart of a method for controlling an IoT device provided by another exemplary embodiment of the present application.
  • the embodiment of the present application is described by taking the method applied to the terminal device shown in FIG. Methods include:
  • Step 601 Receive data frames sent by each UWB tag on the target channel, and the data frames are sent by the UWB tag when the target channel is idle.
  • the UWB function of the terminal device is enabled, and the terminal device can receive data frames sent by each UWB tag on the target channel.
  • the process of sending the data frame by the UWB tag reference may be made to the above-mentioned embodiment on the side of the UWB tag, which will not be repeated in this embodiment.
  • each UWB tag Since each UWB tag sends data frames when the target channel is idle, there is no conflict between the data frames sent by different UWB tags, which ensures the accuracy of the data frames received by the terminal device and helps to improve subsequent IoT device control. accuracy.
  • Step 602 based on the data frame, determine the target IoT device from the IoT devices represented by each UWB tag.
  • the terminal device After receiving the data frame, the terminal device determines the IoT device represented by each UWB tag based on the information contained in the data frame, and further determines the target IoT device to be controlled from the identified IoT devices.
  • the target IoT device is an IoT device that satisfies the spatial location relationship condition with the terminal device.
  • the target IoT device is the IoT device that the terminal device is currently facing.
  • Step 603 control the target IoT device.
  • the terminal device further determines a connection mode with the target IoT device, so as to establish a data communication connection with the target IoT device through the connection mode, and then connect to the target IoT device through the data communication connection.
  • the target IoT device is controlled.
  • the connection mode includes WiFi connection, Bluetooth connection, infrared connection, etc., which is not limited in this embodiment.
  • the connection method between the target IoT device and the terminal device is WiFi connection
  • the target IoT device and the terminal device are connected to the same WiFi, that is, the target IoT device and the terminal device are connected through the same routing device.
  • the terminal device can establish a WiFi data communication connection with the target IoT device through the routing device according to the device identification of the target IoT device.
  • the terminal device may send a connection establishment instruction to the routing device.
  • the connection establishment instruction includes a device identifier corresponding to the target IoT device.
  • the routing device sends a connection establishment instruction to the target IoT device according to the device identifier of the target IoT device carried in the connection establishment instruction.
  • the target IoT device receives the connection establishment instruction, and establishes a WiFi data communication connection with the terminal device.
  • the terminal device can establish a Bluetooth data communication connection with the target IoT device through the Bluetooth component according to the device identifier of the target IoT device.
  • both the terminal device and the target IoT device enable the Bluetooth function.
  • the terminal device can receive the Bluetooth signal broadcast by other IoT devices, and the Bluetooth signal can carry the device identifier corresponding to each IoT device. to determine the target Bluetooth signal.
  • the target Bluetooth signal is broadcast by the target IoT device, and a Bluetooth data communication connection is established with the target IoT device.
  • the terminal device may also directly broadcast a Bluetooth connection instruction, where the Bluetooth connection instruction includes a device identifier corresponding to the target IoT device.
  • the target IoT device determines that the device identification is consistent with its own device identification, and establishes a Bluetooth data communication connection with the terminal device.
  • the terminal device saves the connection method corresponding to the target IoT device, and can continue to use this connection method to establish a data communication connection with the target IoT device; If the device has not established a data communication connection with the target IoT device before, the terminal device needs to establish a connection with the target IoT device first, and after the data communication connection is successfully established, save the connection method corresponding to the target IoT device.
  • the terminal device can establish a data communication connection with the IoT device represented by the UWB tag by performing UWB communication with the UWB tag, and perform data communication on the IoT device. control. During the entire control process, users do not need to manually establish a connection between the terminal device and the IoT device, which improves the convenience and automation of IoT device control.
  • the terminal device only needs to receive data frames on the target channel without sending data to the UWB tag (only receiving but not sending, corresponding to the only sending and not receiving of UWB tags), which helps to reduce Power consumption when the terminal device controls the IoT device.
  • the terminal device can determine the relationship with each IoT device (UWB tag) based on the received data frame. set on the IoT device), and then determine the IoT device pointed by the terminal device as the target IoT device and control it.
  • UWB tag IoT device
  • FIG. 7 shows a flowchart of a method for controlling an IoT device provided by another exemplary embodiment of the present application.
  • the embodiment of the present application is described by taking the method applied to the terminal device shown in FIG. Methods include:
  • Step 701 alternately receive data frames sent by each UWB tag on the target channel through the first antenna group and the second antenna group, where the first antenna group and the second antenna group correspond to different directions.
  • the terminal device determines the spatial position relationship with each UWB tag based on the spatial positioning principle in the UWB technology. In a possible implementation manner, the terminal device determines the spatial position relationship with the UWB tag according to the phase difference of the data frame arriving at the antenna.
  • the terminal device in this embodiment of the present application is provided with two sets of antennas, which are a first antenna group and a second antenna group respectively, and the third antenna An antenna group and a second antenna group correspond to different antenna directions.
  • Each antenna group contains two antennas for measuring horizontal and vertical angles respectively. For example, there is a preset angle between the first antenna group and the second antenna group, and the preset angle may be 60 degrees.
  • the first antenna group may be a horizontal antenna group
  • the second antenna group may be a vertical antenna group.
  • the horizontal antenna group includes a first antenna and a second antenna
  • the first antenna and the second antenna are antennas arranged in the horizontal direction
  • the vertical antenna group includes a first antenna and a third antenna
  • the first antenna and the third antenna are vertical antennas Antennas arranged in a straight direction, wherein the first antenna is a public antenna, which can be used to measure the positional relationship in the horizontal direction and also participate in the measurement of the positional relationship in the vertical direction.
  • the UWB component may also include four antennas, namely a first antenna, a second antenna, a third antenna and a fourth antenna.
  • the first antenna and the second antenna are a horizontal antenna group
  • the third antenna and the fourth antenna are a vertical direction group, which is not limited in this embodiment of the present application.
  • the antenna directions of the first antenna group and the second antenna group may correspond to the horizontal direction and the vertical direction of the terminal, that is, the antennas in the horizontal antenna group are along the terminal device.
  • the antennas in the vertical antenna group are arranged along the vertical direction of the terminal device.
  • FIG. 8 it shows a schematic diagram of an antenna structure of a UWB component in a terminal device provided by an exemplary embodiment of the present application.
  • the first antenna group includes a first antenna 801 and a second antenna 802
  • the second antenna group includes a first antenna 801 and a third antenna 803 .
  • the terminal device In order to determine the spatial position relationship between the UWB tag and the terminal device, the terminal device alternately receives the data frames sent by each UWB tag on the target channel through the first antenna group and the second antenna group, that is, the same UWB tag is sent through different antenna groups. data frame.
  • the terminal device first receives data frames on the target channel through the first antenna group, and when the data frame receiving duration of the first antenna group reaches a preset duration, switches the second antenna group to the target channel Receive data frames.
  • the terminal device first receives the data frames sent by the UWB tags 1-4 on the target channel through the first antenna group, and then switches to the second antenna group to receive the UWB tags 1-4 on the target channel. Data frames sent on the channel.
  • Step 702 Determine the spatial positional relationship between the terminal device and each UWB tag based on the data frame, where the spatial positional relationship includes a horizontal direction angle and a vertical direction angle.
  • Angle of Arrival (AOA) measurement Determine the spatial position of the object according to the arrival angle of the data frame
  • Signal Phase Difference of Arrival (PDoA) measurement determine the spatial position of the object according to the arrival phase difference of the data frame .
  • AOA Angle of Arrival
  • PoA Signal Phase Difference of Arrival
  • the embodiments of the present application do not limit the specific manner used for determining the spatial position relationship.
  • determining the spatial positional relationship between the UWB tag and the terminal device may include the following steps:
  • the first antenna group is taken as an example to measure the horizontal direction angle for description.
  • the UWB tag can be determined according to the arrival phase difference between the two antennas of the same data frame.
  • the horizontal angle from the terminal device in the horizontal direction is a certain distance between the two antennas.
  • the horizontal direction angle of the UWB tag 1001 relative to the horizontal antenna group 1002 is ⁇ , and according to the geometric relationship, it can be known that the horizontal direction angle is equal to the angle ⁇ .
  • the horizontal antenna group 1002 includes a first antenna and a second antenna. There is a distance between the first antenna and the second antenna.
  • the horizontal direction angle ⁇ can be calculated from the arrival phase difference.
  • ⁇ represents the angle (in this embodiment, it can represent the horizontal azimuth angle between the terminal device and the UWB tag), ⁇ represents the wavelength, ⁇ represents the arrival phase difference, and d represents the horizontal distance between the first antenna and the second antenna.
  • the second antenna group is taken as an example to measure the vertical direction angle for description.
  • the vertical antenna group includes two antennas, and there is a certain distance between the two antennas, when the vertical antenna group is used for data frame reception, two antennas can be reached according to the same data frame.
  • the arrival phase difference between the antennas determines the vertical angle between the UWB tag and the terminal device in the vertical direction.
  • the application scenario includes a terminal device 1001 and a UWB tag 1002 , and the terminal device 1001 is provided with a UWB component.
  • the UWB tag 1002 sends the data frame through the target channel, and the terminal device 1001 receives the data frame broadcasted by the UWB tag 1002 through the UWB component.
  • the terminal device 1001 determines the horizontal direction angle ⁇ and the vertical direction angle ⁇ between the terminal device 1001 and the UWB tag 1002 according to the data frame, then determines that the UWB tag 1002 is located at the terminal device 1001 horizontal direction angle + ⁇ , vertical direction angle + ⁇ position.
  • the application scenario may contain multiple UWB tags, and measuring the spatial positional relationship between the terminal device and a single UWB tag requires switching the antenna component that receives the data frame, in order to avoid that the terminal device does not all receive the application when switching the antenna group
  • the data frames broadcast by all UWB tags in the scene make it impossible to measure the spatial positional relationship of all UWB tags in the application scene in one antenna group switching process, thereby reducing the subsequent comparison and judgment of the target UWB tag pointed or facing by the terminal device. accuracy.
  • the tag identifier of the UWB tag is inserted into the data frame broadcast by the UWB tag, so that the terminal can record the tag identifier included in the received data frame before switching the antenna. Therefore, it can be judged based on the tag identification whether the data frame broadcast by each UWB tag that may be included in the application scenario is received, and the accuracy of the timing of switching the antenna group is improved.
  • the process of determining the timing of performing antenna group switching between the first antenna group and the second antenna group may be: receiving at least one data frame broadcast by the UWB tag through the first antenna group, and obtaining UWB from the data frame.
  • the tag identifier corresponding to the tag and then a tag set is constructed based on the tag identifier.
  • the tag identifier contained in the tag set stops changing, it is determined that the data frame reception of the UWB tag broadcast in this application scenario is completed, and the second antenna group can be switched to continue to receive.
  • the data frame broadcast by the UWB tag may be: receiving at least one data frame broadcast by the UWB tag through the first antenna group, and obtaining UWB from the data frame.
  • the tag identifier corresponding to the tag and then a tag set is constructed based on the tag identifier.
  • Step 703 based on the spatial position relationship, determine the UWB tag pointed to by the terminal device as the target UWB tag.
  • determining whether the terminal device points to the UWB tag it can be determined by judging whether the spatial positional relationship between the terminal device and the UWB tag deviates, that is, to determine whether the horizontal direction angle between the terminal device and the UWB tag deviates from the preset horizontal angle range, and It is determined whether the vertical direction angle between the terminal device and the UWB tag deviates from the preset vertical angle range.
  • the terminal device determines a UWB tag whose horizontal direction angle with the terminal device is within the horizontal angle range and whose vertical direction angle with the terminal device is within the vertical angle range as the target UWB tag .
  • the horizontal angle range may be -10 degrees to 10 degrees, and the vertical angle range may be 0 degrees to 30 degrees, which is not limited in this embodiment of the present application.
  • the terminal device determines the spatial positional relationship with each UWB tag as follows: UWB tag A (horizontal angle-30 degrees, vertical angle 10 degrees); UWB tag B (horizontal angle-2 degrees) , vertical direction angle 10 degrees); UWB label C (horizontal direction angle 35 degrees, vertical direction angle 5 degrees); UWB label D (horizontal direction angle 60 degrees, vertical direction angle 20 degrees). If the horizontal angle range is -10 degrees to 10 degrees, and the vertical angle range is 0 degrees to 30 degrees, since the spatial positional relationship between the UWB tag B and the terminal device is within this angle range, the terminal device determines the UWB tag B as the target. UWB tags.
  • Step 704 the IoT device represented by the target UWB tag is determined as the target IoT device.
  • the terminal device determines the IoT device represented by the target UWB tag as the target IoT device by parsing the data frame sent by the target UWB tag, so as to subsequently realize accurate control of the target IoT device.
  • the information contained in the data frame sent by the UWB tag may be: the device identification and location information of the IoT device, the device identification of the IoT device or the label identification of the UWB tag itself, etc.
  • the process of determining the target IoT device can be: in the case where the UWB tag can be used to determine the target IoT device represented by the UWB tag according to the device identification and location information; in the case where the data frame sent by the UWB tag contains the device identification of the IoT device , the terminal device can determine the target IoT device represented by the UWB tag according to the device identification; if the data frame sent by the UWB tag contains the tag identification, the terminal device pre-stores each UWB tag and the IoT device and the IoT device represented by it. The mapping relationship between them enables the terminal device to obtain the device identification from the mapping relationship according to the label identification, and determine the target Io
  • Step 705 control the target IoT device.
  • a connection condition is set, that is, the terminal device needs to meet the In the case of this connection condition, it is allowed to establish a data communication connection with the target IoT device and control the target IoT device.
  • connection conditions are set for different IoT devices, so that users can use different operations for different IoT devices, further improving the accuracy of establishing data communication connections.
  • the connection condition corresponding to IoT device A is a touch condition
  • the connection condition corresponding to IoT device B is a gesture condition
  • the terminal device determines that the target IoT device is IoT device A, but receives the user's gesture operation, obviously, the gesture
  • the operation does not match the touch conditions corresponding to IoT device A, it may be that the determination of the target IoT device is inaccurate and does not correspond to user expectations. In this case, you can stop continuing to establish a data communication connection with IoT device A to avoid establishing wrong data communication. connect.
  • the terminal device determines the target IoT device, it continues to determine whether the terminal device satisfies the connection condition corresponding to the target IoT device, and if the connection condition corresponding to the target IoT device is satisfied, establishes data with the target IoT device Communication connection, and control the target IoT device; if the connection conditions corresponding to the target IoT device are not met, stop establishing a data communication connection with the target IoT device.
  • connection conditions include at least one of pointing duration conditions, gesture conditions, touch conditions, sensor conditions, and voice control conditions.
  • the terminal device determines that the duration of pointing to the target UWB tag exceeds the duration threshold, and determines that the user wants the terminal device to establish a data communication connection with the target IoT device represented by the target UWB tag.
  • the duration threshold may be 5s, and the duration threshold is preset by the developer as a default value, or set by the user.
  • the terminal device When the terminal device is determined to point to the target UWB tag within 5s (or the terminal device is determined to be in a positive relationship with the target UWB tag within 5s), it is determined that the terminal device meets the connection conditions corresponding to the target IoT device, and The target IoT device establishes a data communication connection and controls the target IoT device; otherwise, the subsequent steps of establishing a data communication connection with the target IoT device are stopped.
  • the pointing duration condition can be set by the user, and different pointing duration conditions can be set for different IoT devices.
  • the pointing duration condition corresponding to IoT device A is 3 s
  • the pointing duration condition corresponding to IoT device B is 5 s, which is not limited in this embodiment of the present application.
  • the gesture condition is determined as the connection condition: when the terminal device detects that the user performs a preset gesture corresponding to the target IoT device, it means that the user needs to establish a data communication connection between the terminal device and the target IoT device, and the preset gesture can be "OK" On the other hand, if the terminal does not detect the preset gesture, or the detected gesture operation is different from the preset gesture, the terminal device stops the subsequent establishment of a data communication connection with the target IoT device.
  • the user can set different preset gestures for different IoT devices.
  • the gesture condition corresponding to IoT device A is: a gesture of "OK" by the user is detected;
  • the gesture condition corresponding to IoT device B is: it is detected that the user draws a preset pattern on the screen of the terminal device, etc.
  • the touch condition is determined as the connection condition: when the terminal device detects that the user touches the preset position of the terminal, for example, the fingerprint recognition area, and detects that the fingerprint is the fingerprint that controls the terminal device to establish a data communication connection with the target IoT device; Or when the terminal detects that the user taps the screen of the terminal device, it establishes a data communication connection with the target IoT device; otherwise, if the terminal does not detect the preset touch operation, or the detected touch operation is different from the preset touch operation , the terminal device stops the subsequent establishment of a data communication connection with the target IoT device.
  • the user can also set different touch conditions for different IoT devices to distinguish the data communication connection between the terminal device and different IoT devices, and improve the accuracy of the data communication connection between the terminal device and the IoT device.
  • the terminal device may establish a data communication connection with the target IoT device when it detects that the user holds the terminal to perform a preset operation. For example, the terminal device detects that the user holds the terminal device to perform a "shake" operation, and establishes a data communication connection with the target IoT device.
  • the user can also set different sensor conditions for different IoT devices.
  • the voice control condition is used as the connection condition: when the terminal device determines the target IoT device, the voice detection function can be enabled, and when a voice command related to the target IoT device is detected, a data communication connection is established with the target IoT device.
  • the voice control condition corresponding to the smart TV indicates that the preset voice command is "screen projection".
  • the terminal device determines that the target IoT device is a smart TV and receives the screen projection command, the terminal device and the smart TV establish a data communication connection in advance. .
  • the user can set different voice control conditions for devices that do not pass through the IoT.
  • the terminal device uses the first antenna group and the second antenna group alternately to receive data frames on the target channel, so as to determine the horizontal direction between the UWB tag and the terminal device according to the data frame reception conditions of different antenna groups Angle and vertical direction angle, so as to determine the UWB tag pointed by the terminal device based on the horizontal and vertical direction angle, and control the IoT device represented by the pointed UWB tag, which improves the convenience and accuracy of IoT device control.
  • the data frame includes a tag identifier
  • the terminal device stores the mapping relationship between the UWB tag and the IoT device.
  • the terminal device determines the target IoT device represented by the target UWB tag, it obtains the tag ID from the data frame sent by the target UWB tag, and based on the tag ID, obtains the tag ID from the mapping relationship between the UWB tag and the IoT device. Identify target IoT devices.
  • the terminal device in response to the binding operation, obtains the tag identifier of the UWB tag to be bound; Select an operation to establish the mapping relationship between the label ID and the device ID corresponding to the IoT device.
  • the UWB tag sends a data frame when it is powered on, and the data frame contains a tag identifier that uniquely identifies the UWB tag.
  • the terminal device When receiving a (tag) binding operation, the terminal device will receive the pending binding on the target channel. The terminal device establishes a mapping relationship between the two when receiving the user's selection operation of the IoT device to be bound.
  • mapping relationship between UWB tags and IoT devices is shown in Table 1.
  • the UWB tag After the binding is completed, the UWB tag still sends data frames on the target channel.
  • the terminal device can obtain the tag identification of the UWB tag from the data frame, and then determine the IoT device represented by the UWB tag based on the mapping relationship.
  • the terminal device when the user triggers the decoding of the UWB tag, in response to the unbinding operation, the terminal device only needs to delete the mapping relationship indicated by the UWB tag to complete the unbinding of the UWB tag and the IoT device.
  • the unbinding process is simple and does not require It will affect the data frame transmission of the UWB tag.
  • the UWB tag only needs to send a data frame containing the tag identification, and the terminal device can complete the tag binding and subsequent IoT device control based on the data frame.
  • the function of the UWB tag is simple and low-cost.
  • the data frame contains the device identifier of the IoT device.
  • the terminal device determines the target IoT device represented by the target UWB tag, it can directly obtain it from the data frame sent by the target UWB tag. device identification, and then determine the IoT device corresponding to the device identification as the target IoT device.
  • the terminal device connected to the IoT device can use the UWB tag to control the IoT device without the need for The above-mentioned mapping relationship is stored in advance.
  • the terminal device in response to the binding operation, sends the first binding information to the UWB tag in the binding state on the target channel, the The first binding information includes the tag identifier of the UWB tag (to be bound) and the device identifier of the IoT device bound to the UWB tag.
  • the UWB tag includes two states, namely a binding state and a working state.
  • the binding state the UWB tag sends a data frame containing the tag identification of the tag identification on the target channel, and receives the first binding information sent by the terminal device on the target channel.
  • the tag identification included in the received first binding information is consistent with the own tag identification
  • the UWB tag stores the device identification and enters a working state.
  • the working state the UWB tag only sends the data frame containing the device identification on the target channel, and will not receive the data frame on the target channel.
  • the terminal device 1201 selects the smart speaker 1203 bound to the UWB tag 1202, thereby The first binding information including the tag identification and the device identification is sent on the target channel.
  • the UWB tag 1202 in the binding state receives the first binding information, since the tag identification contained in the first binding information is consistent with itself, the UWB tag 1202 stores the device identification contained in the first binding information, And switch to the working state, so as to send the data frame containing the device identification in the working state.
  • the data frame in addition to the device identifier of the IoT device, also includes location information, where the location information is used to indicate the location where the UWB tag is located, or is used to indicate the location where the IoT device is located. Location.
  • the terminal device determines the target IoT device represented by the target UWB tag, it can directly obtain the device identification from the data frame sent by the target UWB tag, and then determine the IoT device corresponding to the device identification as the target IoT device.
  • the terminal device can further determine the distance between the IoT device and the terminal device according to the location information contained in the data frame, so that the distance between the two is less than When the distance threshold (for example, 10m) is reached, the IoT device is determined as the target IoT device.
  • the distance threshold for example, 10m
  • the terminal device in response to the binding operation, sends a second binding to the UWB tag in the bound state on the target channel information, the second binding information includes the label identifier of the (to be bound) UWB tag, the device identifier of the IoT device bound to the UWB tag, and the location information.
  • the UWB tag in the binding state, sends a data frame containing the tag identification of the tag identification on the target channel, and receives the second binding information sent by the terminal device on the target channel.
  • the UWB tag stores the device identification and location information, and enters a working state. In the working state, the UWB tag only sends data frames containing device identification and location information on the target channel, and will not receive data frames on the target channel.
  • the UWB tag is provided with a physical button.
  • the UWB tag When receiving a trigger operation of the physical button, the UWB tag switches to a bound state, and automatically switches to work after the device identification (and location information) is stored. state. And, when the UWB tag is switched from the working state to the binding state, the UWB tag deletes the stored device identification (and location information), and resends the data frame containing the tag identification.
  • the operations performed by the terminal device to control the IoT device are not the same.
  • the terminal device when the terminal device determines that the target IoT device is a smart TV, the terminal device can control the target IoT device to perform a screen projection operation, that is, the current display screen of the terminal device can be transmitted to the smart TV .
  • an operation confirmation control can be displayed on the display interface of the terminal device. If the user needs to perform a screen projection operation, the operation confirmation control can be clicked.
  • the terminal device After receiving the click operation on the operation confirmation control, the current display screen of the terminal device can be transmitted to the smart TV, so that the user can continue to watch the displayed content through the smart TV.
  • the terminal device may further display a control interface corresponding to the smart TV, and the control interface further includes function controls corresponding to the smart TV.
  • the control interface further includes function controls corresponding to the smart TV.
  • the user can click the video progress adjustment control, and the terminal device controls the smart TV to adjust the current video playback progress in response to the trigger operation of the video progress adjustment control.
  • the terminal device may display a control interface corresponding to the smart home device, wherein, The control interface includes function controls corresponding to the smart home devices; the user can click the function controls on the control interface as required, and the terminal device controls the smart home devices to perform corresponding device functions in response to triggering operations on the function controls in the control interface.
  • the smart home devices may include: smart refrigerators, smart speakers, smart door locks, smart curtains, smart lamps, smart air conditioners, etc.
  • the embodiments of the present application do not limit the types of smart home devices.
  • the control interface displayed in the terminal device may include: volume adjustment controls, music progress adjustment controls, playback mode adjustment controls, etc.; the target IoT device is a smart door lock, and the control interface displayed in the terminal device may Including: password setting control, switch control, etc.; if the target IoT device is a smart curtain, the control interface displayed in the terminal device may include: curtain shading adjustment control, curtain switch control, etc.; if the target IoT device is a smart air conditioner, the terminal device The displayed control interface may include: temperature adjustment control, mode adjustment control, wind speed adjustment control, switch control, etc.; if the target IoT device is a smart lamp, the control interface displayed in the terminal device may include: lamp switch control, brightness adjustment control, color temperature Adjustment controls, etc.
  • FIG. 13 shows a structural block diagram of an apparatus for controlling an IoT device provided by an embodiment of the present application.
  • the device has the function of implementing the function performed by the UWB tag side in the above method embodiments, and the function may be implemented by hardware or by executing corresponding software by hardware.
  • the apparatus may include:
  • the listening module 1301 is used to listen to the target channel in the working state
  • the data frame sending module 1302 is configured to send a data frame on the target channel in response to the target channel being idle, so that the terminal device can determine the IoT device represented by the UWB tag according to the data frame, and perform a data frame on the IoT device. control;
  • the listening module 1301 is further configured to listen to the target channel again after a random delay time in response to the target channel being occupied.
  • the device :
  • a first dormancy module configured to enter a dormant state after the data frame is sent
  • the listening module 1301 is further configured to wake up and listen to the target channel in response to the sleep duration reaching the sleep duration.
  • the device includes:
  • a second dormancy module configured to determine the random delay duration in response to the target channel being occupied, and enter a dormant state
  • the listening module 1301 is configured to wake up and listen to the target channel again in response to the duration of the dormant state reaching the random delay time.
  • the second sleep module includes:
  • a duration determining unit configured to determine the random delay duration based on the number of listening times, where the number of listening times is used to indicate the number of times of listening to the target channel before sending the data frame;
  • the device also includes:
  • An update module configured to update the listening times.
  • the unit for determining the duration which is specifically used for:
  • a delay duration range is determined based on the number of interceptions, wherein the delay duration range is positively correlated with the number of interceptions;
  • the random delay duration is determined from the delay duration range.
  • the listening mode of the target channel includes at least one of energy detection and carrier detection.
  • the data frame includes a tag identifier
  • the terminal device stores a mapping relationship between the UWB tag and the IoT device
  • the terminal device is configured to convert the mapping from the mapping according to the tag identifier.
  • the device identifier is obtained from the relationship, and the IoT device is controlled based on the device identifier.
  • the data frame includes a device identifier of the IoT device, and the terminal device is used to control the IoT device based on the device identifier;
  • the device also includes:
  • a first information receiving module configured to receive, on the target channel, first binding information sent by the terminal device in a bound state, where the first binding information includes a label identifier of the UWB label, and the device identifier of the IoT device bound to the UWB tag;
  • the first storage module is used for storing the device identification and entering a working state.
  • the data frame includes the device identifier and location information of the IoT device, and the terminal device is used to control the IoT device based on the device identifier and the location information, and the location information is used to control the IoT device.
  • the terminal device is used to control the IoT device based on the device identifier and the location information, and the location information is used to control the IoT device.
  • the location information is used to control the IoT device.
  • the device also includes:
  • a second information receiving module configured to receive second binding information sent by the terminal device on the target channel in a bound state, where the second binding information includes the label identifier of the UWB label, the device identifier of the IoT device bound to the UWB tag, and the location information;
  • the second storage module is used for storing the device identification and the location information, and entering a working state.
  • the UWB tag in the working state determines the channel state of the target channel by listening to the target channel, and when the target channel is idle, it sends a data frame on the target channel, so that the terminal device can pair the data frame based on the data frame.
  • the IoT device represented by the UWB tag is controlled.
  • UWB tags When the target channel is occupied, the target channel is monitored again after a random delay to avoid data frame collision caused by different UWB tags sending data frames on the target channel at the same time, which is helpful to improve the IoT Accuracy of device control; and, by introducing channel listening and random delay mechanism, UWB tags only send data frames in working state without receiving data frames sent by other UWB tags, that is, without sensing the existence of other UWB tags , which helps to improve the flexibility of UWB tag access and reduces the power consumption of UWB tags.
  • FIG. 14 shows a structural block diagram of an apparatus for controlling an IoT device provided by another embodiment of the present application.
  • the apparatus has the function of implementing the function performed by the terminal device side in the above method embodiments, and the function may be implemented by hardware or by executing corresponding software by the hardware.
  • the apparatus may include:
  • a data frame receiving module 1401, configured to receive data frames sent by each UWB tag on a target channel, the data frames being sent by the UWB tag when the target channel is idle;
  • a device determination module 1402 configured to determine a target IoT device from the IoT devices represented by each of the UWB tags based on the data frame;
  • the control module 1403 is used to control the target IoT device.
  • the device determining module 1402 includes:
  • a position determination unit configured to determine a spatial position relationship between the terminal device and each of the UWB tags based on the data frame, where the spatial position relationship includes a horizontal direction angle and a vertical direction angle;
  • a tag determining unit configured to determine the UWB tag pointed to by the terminal device as a target UWB tag based on the spatial position relationship
  • a device determining unit configured to determine the IoT device represented by the target UWB tag as the target IoT device.
  • the data frame receiving module 1401 is used for:
  • the data frames sent by each of the UWB tags are alternately received on the target channel through a first antenna group and a second antenna group, where the first antenna group and the second antenna group correspond to different directions;
  • the position determination unit is used for:
  • the vertical direction angle between the terminal device and each of the UWB tags is determined.
  • label determination unit for:
  • a UWB tag whose horizontal direction angle with the terminal device is within the horizontal angle range and whose vertical direction angle with the terminal device is within the vertical angle range is determined as the target UWB tag.
  • the device determining unit is used for:
  • the target IoT device is determined from the mapping relationship between the UWB tag and the IoT device.
  • the apparatus further includes a first binding module for:
  • a mapping relationship between the label identifier and the device identifier corresponding to the IoT device is established.
  • the device further includes:
  • An unbinding module configured to delete the mapping relationship indicated by the UWB tag in response to the unbinding operation.
  • the device determining unit is used for:
  • the IoT device corresponding to the device identifier is determined as the target IoT device.
  • the device further includes:
  • a second binding module configured to send first binding information to the UWB tag in the binding state on the target channel in response to the binding operation, where the first binding information includes the tag of the UWB tag identification, and the device identification of the IoT device bound to the UWB tag, so that the UWB tag stores the device identification;
  • a third binding module configured to send second binding information to the UWB tag in the binding state on the target channel in response to the binding operation, where the second binding information includes the tag of the UWB tag identifier, the device identifier of the IoT device bound to the UWB tag, and location information, so that the UWB tag stores the device identifier and the location information, and the location information is used to indicate the The location where the UWB tag is located, or is used to indicate the location where the IoT device is located.
  • the terminal device can establish a data communication connection with the IoT device represented by the UWB tag by performing UWB communication with the UWB tag, and communicate with the IoT device. device to control.
  • the terminal device can establish a data communication connection with the IoT device represented by the UWB tag by performing UWB communication with the UWB tag, and communicate with the IoT device. device to control.
  • users do not need to manually establish a connection between the terminal device and the IoT device, which improves the convenience and automation of IoT device control.
  • the terminal device only needs to receive data frames on the target channel without sending data to the UWB tag (only receiving but not sending, corresponding to the only sending and not receiving of UWB tags), which helps to reduce Power consumption when the terminal device controls the IoT device.
  • FIG. 15 shows a structural block diagram of a terminal device 1500 provided by an exemplary embodiment of the present application.
  • the terminal device 1500 in this application may include one or more of the following components: a processor 1510, a memory 1520, and a UWB component 1530, wherein the processor 1510 is electrically connected to the memory 1520 and the UWB component 1530, respectively.
  • Processor 1510 may include one or more processing cores.
  • the processor 1510 uses various interfaces and lines to connect various parts of the entire terminal device 1500, and executes by running or executing the instructions, programs, code sets or instruction sets stored in the memory 1520, and calling the data stored in the memory 1520.
  • the processor 1510 may adopt at least one of digital signal processing (Digital Signal Processing, DSP), field-programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA).
  • DSP Digital Signal Processing
  • FPGA Field-Programmable Gate Array
  • PLA programmable logic array
  • a hardware form is implemented.
  • the processor 1510 may integrate one or a combination of a CPU, a graphics processor (Graphics Processing Unit, GPU), a modem, and the like.
  • the CPU mainly handles the operating system, user interface and application programs, etc.; the GPU is used for rendering and drawing the content that needs to be displayed on the touch screen; the modem is used to handle wireless communication. It can be understood that, the above-mentioned modem may not be integrated into the processor 1510, and is implemented by a communication chip alone.
  • the memory 1520 may include a random access memory (Random Access Memory, RAM), or may include a read-only memory (Read-Only Memory, ROM).
  • RAM Random Access Memory
  • ROM Read-Only Memory
  • the memory 1520 includes a non-transitory computer-readable storage medium.
  • Memory 1520 may be used to store instructions, programs, codes, sets of codes, or sets of instructions.
  • the memory 1520 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playback function, an image playback function, etc.) , instructions for implementing the above method embodiments, etc.
  • the operating system can be an Android (Android) system (including a system based on the deep development of the Android system), an IOS system developed by Apple (including a system based on the deep development of the IOS system) or other systems.
  • the storage data area may also store data (such as phone book, audio and video data, chat record data) created by the terminal device 1300 during use.
  • at least one instruction is stored in the memory 1520, and the at least one instruction is used to be executed by the processor 1510 to execute the method for controlling an IoT device as shown in the foregoing embodiments.
  • the UWB component 1530 is configured to receive the data frame broadcast by the external UWB component, so that the terminal device 1500 can process the data frame through the processor to achieve the purpose of determining the spatial position of the IoT device according to the data frame.
  • the UWB component can be packaged as an internal antenna component of the terminal device, the UWB component is electrically connected to the terminal device through the internal circuit board, and the terminal device can receive the data frame broadcast by the UWB tag through the UWB component.
  • the UWB component can be packaged as a terminal fitting, and the terminal fitting is independent of the terminal equipment.
  • the terminal equipment and the terminal fitting are electrically connected through the interface circuit, so that the The terminal device may have spatial position awareness capability; when the terminal device is not equipped with the terminal accessory, the terminal device does not have the spatial position awareness capability.
  • the terminal accessory includes a UWB component and an interface circuit, and the UWB component transmits data frames to the terminal device through the interface circuit; optionally, the terminal accessory also includes a universal serial bus hub ( Universal Serial Bus Hub, USB Hub), when the terminal device is wearing the terminal accessory, the terminal accessory can communicate with the terminal through the USB Hub.
  • a universal serial bus hub Universal Serial Bus Hub, USB Hub
  • the UWB component 1530 may include two antenna groups, for example, a first antenna group and a second antenna group, and the first antenna group and the second antenna group alternately receive data frames on the target channel to determine the The horizontal direction angle of the UWB label, and the vertical direction angle of the UWB label.
  • the first antenna group and the second antenna group may include different antennas, that is, the first antenna group includes the first antenna and the second antenna, and the second antenna group includes the third antenna and the fourth antenna;
  • the first antenna group and the second antenna group may share some antennas.
  • the first antenna group includes the first antenna and the second antenna
  • the second antenna group includes the first antenna and the third antenna.
  • the first antenna group and the second antenna group share the first antenna.
  • the terminal device 1500 may further include a touch display screen, which may be a capacitive touch display screen, and the capacitive touch display screen is used to receive user touches on or near it using any suitable object such as a finger, a touch pen, etc. operations, as well as displaying the user interface of each application.
  • the touch display screen is usually provided on the front panel of the terminal device 1500 .
  • the touch screen can be designed as a full screen, a curved screen or a special-shaped screen.
  • the touch display screen can also be designed to be a combination of a full screen and a curved screen, or a combination of a special-shaped screen and a curved screen, which is not limited in this embodiment of the present application.
  • the structure of the terminal device 1500 shown in the above drawings does not constitute a limitation on the terminal device 1500, and the terminal may include more or less components than those shown in the drawings, or combinations thereof certain components, or different component arrangements.
  • the terminal device 1500 also includes components such as radio frequency circuits, photographing components, sensors (excluding temperature sensors), audio circuits, Wireless Fidelity (WiFi) components, power supplies, and Bluetooth components, which will not be repeated here.
  • FIG. 16 shows a structural block diagram of a UWB tag provided by an exemplary embodiment of the present application.
  • UWB tag 1600 includes: microprocessor 1610 and UWB transceiver 1620.
  • the microprocessor 1610 is electrically connected to the UWB transceiver 1620, and the UWB transceiver 1620 is configured to execute the control method of the IoT device on the UWB tag side in the above embodiment under the control of the microprocessor 1610.
  • FIG. 17 shows a structural block diagram of an IoT device control system 1700 provided by an exemplary embodiment of the present application.
  • the control system includes a mid-terminal device 1701 , a UWB tag 1702 and an IoT device 1703 .
  • the terminal device 1701 establishes UWB communication with the UWB tag 1702, the UWB tag 1702 is used to represent the IoT device 1703 to be connected, and the UWB tag 1702 is independent of the IoT device 1703;
  • the UWB tag 1702 sends a data frame to the terminal device 1701;
  • the terminal device 1701 determines the device information of the IoT device 1703 represented by the UWB tag 1702 according to the data frame sent by the UWB tag 1702 , establishes a data communication connection with the IoT device 1703 according to the device information, and controls the IoT device 1703 .
  • Embodiments of the present application further provide a computer-readable storage medium, where at least one piece of program code is stored in the computer-readable storage medium, and the program code is loaded and executed by a processor to implement the IoT device described in the various embodiments above. Control Method.
  • a computer program product or computer program comprising computer instructions stored in a computer readable storage medium.
  • the processor of the terminal device or the UWB tag reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the terminal device or the UWB tag executes the IoT device provided in the various optional implementations of the above aspects. Control Method.
  • references herein to "a plurality” means two or more.
  • "And/or" which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" generally indicates that the associated objects are an "or” relationship.
  • the numbering of the steps described in this document only exemplarily shows a possible execution sequence between the steps. In some other embodiments, the above steps may also be executed in different order, such as two different numbers. The steps are performed at the same time, or two steps with different numbers are performed in a reverse order to that shown in the figure, which is not limited in this embodiment of the present application.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
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Abstract

L'invention concerne un procédé et un appareil de commande pour dispositif IoT, une étiquette UWB et un dispositif terminal, se rapportant au domaine technique des étiquettes ultra-large bande (UWB). Le procédé comprend : dans un état de travail, l'écoute d'un canal cible (201) ; en réponse au fait que le canal cible est libre, l'envoi d'une trame de données sur le canal cible, de sorte qu'un dispositif terminal détermine, selon la trame de données, un dispositif IoT caractérisé par une étiquette UWB, et commande le dispositif IoT (202) ; et en réponse au fait que le canal cible est occupé, l'écoute du canal cible de nouveau après une durée de retard aléatoire (203). Le procédé facilite une réduction de la consommation d'énergie de l'étiquette UWB.
PCT/CN2021/130923 2021-01-18 2021-11-16 Procédé et appareil de commande pour dispositif iot, étiquette uwb et dispositif terminal WO2022151832A1 (fr)

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CN202110061509.7A CN114885403B (zh) 2021-01-18 2021-01-18 IoT设备的控制方法、装置、UWB标签及终端设备
CN202110061509.7 2021-01-18

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