WO2022006908A1

WO2022006908A1 - Internet-of-things device control method and communication apparatus

Info

Publication number: WO2022006908A1
Application number: PCT/CN2020/101479
Authority: WO
Inventors: 邵帅
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2022-01-13
Also published as: CN115398929A

Abstract

An Internet-of-things (IoT) device control method. Said method comprises: receiving a query signal sent by a control device; sending, in response to the query signal, device information to the control device by means of a backscatter technique, the device information comprising a device identifier and a first device state of an IoT device; receiving a first control signal sent by the control device; and if the first control signal comprises the device identifier of the IoT device, switching to a second device state from the first device state according to the first control signal. By means of said method, the IoT device can be controlled by means of the control device in a near-range, fast, and low-power-consuming manner.

Description

A control method and communication device for Internet of Things equipment

technical field

The present application relates to the field of communication technologies, and in particular, to a control method and a communication device for an Internet of Things device.

Background technique

The Internet of Things (Internet of Things, IoT) is the "Internet of all things connected", which is an extension and expansion of the Internet based on the Internet. It is a huge network formed by combining various information sensing devices with the Internet. Using the technology of the Internet of Things, the intelligent sensing system can control the on and off of the IoT device by sensing the distance between the mobile device and the IoT device.

At present, smart sensing systems mainly use short-range wireless transmission standards such as Bluetooth, WIFI, and Zigbee. However, the systems of these wireless communication standards have the disadvantages of high power consumption, high delay and difficult distance control. For example, the current IoT devices not only need to support the control and power supply of their logic circuits, but also need more energy for wireless transmission and reception, which increases the power consumption of the system. In the two-way communication, it is necessary to complete a more complex application layer standard protocol, which makes the system delay high; for example, the intelligent sensing system using Bluetooth, WIFI, and Zigbee needs to realize ranging through auxiliary means such as detection signal RSSI, AOA, TOF, etc. , but these auxiliary means can usually only measure distances greater than 20 meters, and it is difficult to complete the measurement of shorter distances.

SUMMARY OF THE INVENTION

The present application discloses a control method and a communication device for an Internet of Things device, which can control the Internet of Things device in a short distance, fast and low power consumption through the control device.

In a first aspect, an embodiment of the present application provides a method for controlling an Internet of Things device, which is applied to the Internet of Things device, and the method includes:

Receive the inquiry signal sent by the control device;

Sending device information to the control device through backscattering technology in response to the inquiry signal, where the device information includes the device identifier of the IoT device and the first device state;

receiving the first control signal sent by the control device;

If the first control signal includes the device identification of the Internet of Things device, the state is switched from the first device state to the second device state according to the first control signal.

In one embodiment, before sending device information to the control device through backscattering technology in response to the interrogation signal, at least one continuous wave signal sent by the control device is received; signal energy is obtained through the at least one continuous wave signal, and the signal energy is used for the Internet of Things. power to the device.

In one embodiment, if the first control signal includes the device identifier of the IoT device, after switching from the first device state to the second device state according to the first control signal, a confirmation message is sent to the control device, and the confirmation message includes the IoT device. The device identification and second device state of the device.

In one embodiment, before sending the confirmation information to the control device, at least one continuous wave signal sent by the control device is received; signal energy is obtained through the at least one continuous wave signal, and the signal energy is used to power the IoT device.

In one embodiment, if the first control signal includes the device identifier of the IoT device, after switching from the first device state to the second device state according to the first control signal, if the first control signal is switched from the first device state If the second control signal to the IoT device is not received within the preset time period after the second device state is reached, the second device state is switched to the first device state.

In one embodiment, the interrogation signal further includes a random number instruction.

In one embodiment, before sending device information to the control device through backscattering technology in response to the inquiry signal, generate a first random number and a second random number according to a random number instruction; obtain the difference between the first random number and the second random number; Difference; if the difference is less than 0, it is determined to send device information to the control device.

In one embodiment, before sending device information to the control device through backscattering technology in response to the query signal, receive multiple query signals sent by the control device; generate a first random number and a second random number; When an inquiry signal is used, the difference between the first random number and the second random number is used as the updated first random number; When the next inquiry signal is received, the difference between the first random number obtained by the latest update and the second random number is taken as the first random number after the update, until the first random number obtained by the latest update is less than 0; If the obtained first random number is less than 0, it is determined to send device information to the control device.

In one embodiment, the interrogation signal is also used to indicate the total number of IoT devices in the environment to which the IoT devices belong.

In one embodiment, before sending device information to the control device through backscattering technology in response to the query signal, multiple query signals sent by the control device are received; according to the sum of the number of IoT devices in the environment to which the IoT device belongs, obtain the IoT device. If the number of received interrogation signals reaches the number threshold, it is determined to send device information to the control device.

In a second aspect, an embodiment of the present application provides a control method for an Internet of Things device, which is applied to the control device, and the method includes:

sending an interrogation signal to at least one IoT device;

Receive at least one piece of device information sent by at least one Internet of Things device through backscattering technology, where the at least one piece of device information includes a device identifier of each Internet of Things device in the at least one Internet of Things device and a first device state of each Internet of Things device;

A first control signal is generated according to at least one piece of device information, the first control signal includes a device identifier of at least one IoT device, and the first control signal is used to instruct each device identifier corresponding to the IoT device to be switched by the first device state of each IoT device to the second device status of each IoT device;

sending a first control signal to at least one IoT device;

At least one confirmation message sent by at least one Internet of Things device is received, and each confirmation message in the at least one confirmation message includes a device identifier and a second device state of the Internet of Things device corresponding to each confirmation message.

In one embodiment, before receiving at least one piece of device information sent by at least one Internet of Things device through backscattering technology, at least one continuous wave signal is sent to at least one Internet of Things device, where the at least one continuous wave signal is used to provide signal energy.

In one embodiment, before receiving the at least one confirmation message sent by the at least one IoT device, at least one continuous wave signal is sent to the at least one IoT device, and the at least one continuous wave signal is used to provide signal energy.

In a third aspect, an embodiment of the present application provides a communication device, which is applied to an Internet of Things device, and the device includes:

a transceiver unit for receiving an inquiry signal sent by the control device;

The above-mentioned transceiver unit is further configured to send device information to the control device through backscattering technology in response to the inquiry signal, where the device information includes the device identifier of the Internet of Things device and the first device state;

The above-mentioned transceiver unit is further configured to receive the first control signal sent by the control device;

The processing unit is configured to switch from the first device state to the second device state according to the first control signal if the first control signal includes the device identifier of the IoT device.

In a fourth aspect, an embodiment of the present application provides a communication device, which is applied to a control device, and the device includes:

a transceiver unit, sending an inquiry signal to at least one IoT device;

The above-mentioned transceiver unit is further configured to receive at least one device information sent by at least one Internet of Things device through backscattering technology, and the at least one device information includes the device identifier of each Internet of Things device in the at least one Internet of Things device and the information of each Internet of Things device. the first device state;

The processing unit is configured to generate a first control signal according to at least one device information, where the first control signal includes a device identifier of at least one IoT device, and the first control signal is used to indicate that each device identifier corresponding to the IoT device is determined by the respective IoT device. The first device state is switched to the second device state of each IoT device;

The above-mentioned transceiver unit is further configured to send a first control signal to at least one IoT device;

The above-mentioned transceiver unit is further configured to receive at least one confirmation message sent by at least one Internet of Things device, and each confirmation message in the at least one confirmation message includes a device identifier and a second device state of the Internet of Things device corresponding to each confirmation message.

In a fifth aspect, an embodiment of the present application provides a communication device, including a processor, a memory, and a user interface, where the processor, the memory, and the user interface are connected to each other, wherein the memory is used to store a computer program, and the computer program includes program instructions, processing The controller is configured to invoke the program instructions to execute the control method of the Internet of Things device as described in the first aspect, or the control method of the Internet of Things device as described in the second aspect.

In a sixth aspect, embodiments of the present application provide a computer-readable storage medium, where the computer-readable storage medium stores one or more instructions, and the one or more instructions are suitable for being loaded and executed by a processor as described in the first aspect A control method for an IoT device, or the control method for an IoT device as described in the second aspect.

In the embodiment of this application, the IoT device receives an inquiry signal sent by the control device; in response to the inquiry signal, the device information is sent to the control device through backscattering technology, and the device information includes the device identifier of the IoT device and the first device status; the receiving control device The first control signal sent; if the first control signal includes the device identifier of the IoT device, the state is switched from the first device state to the second device state according to the first control signal. Through this method, the IoT device can be controlled in a short distance, quickly and with low power consumption through the control device.

Description of drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. For those of ordinary skill, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1a is a schematic diagram of a control application of an Internet of Things device in a home scenario provided by an embodiment of the present application;

FIG. 1b is a schematic diagram of an application of IoT device control in a golf course water spray scene provided by an embodiment of the present application;

FIG. 2a is a hardware architecture diagram of a backscatter transceiver device provided by an embodiment of the application;

FIG. 2b is a hardware architecture diagram of another backscatter transceiver device provided by an embodiment of the application;

FIG. 2c is a hardware architecture diagram of another backscatter transceiver device provided by an embodiment of the present application;

3 is a hardware architecture diagram of a control device provided by an embodiment of the present application;

4 is a schematic flowchart of a method for controlling an Internet of Things device provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a method for sending or receiving an inquiry signal provided by an embodiment of the present application;

6 is a schematic diagram of a method for sending or receiving a control signal provided by an embodiment of the present application;

FIG. 7 is a schematic flowchart of another method for controlling an Internet of Things device according to an embodiment of the present application;

FIG. 8 is a schematic flowchart of another method for controlling an Internet of Things device according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a unit of a communication device provided by an embodiment of the present application;

FIG. 10 is a simplified schematic diagram of an entity structure of a communication apparatus provided by an embodiment of the present application.

detailed description

Hereinafter, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application.

In order to better understand the embodiments of the present application, the technical terms involved in the embodiments of the present application are introduced below:

The Internet of Things (IoT) refers to the real-time collection of any objects that need to be monitored, connected, and interacted through various devices and technologies such as various information sensors, radio frequency identification technology, global positioning systems, infrared sensors, and laser scanners. Or process, collect all kinds of required information such as sound, light, heat, electricity, mechanics, chemistry, biology, location, etc., through various possible network access, realize the ubiquitous connection between things and things, things and people, and realize Intelligent perception, identification and management of objects and processes. Common IoT devices can include smart lights, sweeping robots, smart curtains, lawn sprinkler systems, and more.

Back Scatter: Refers to the reflection of waves, particles or signals from the direction they came from. It can be realized that the device itself does not generate a signal, but reflects the transmitted signal, so as to achieve the purpose of information exchange. The signal backscattered by the device can carry the information in the device, and can also imply the location information of the device. Using backscattering technology, the distance between devices or objects can be accurately measured, and the backscattering technology also has the characteristics of low power consumption and low delay.

Continuous Wave (CW): A wave that a laser outputs in a continuous fashion rather than in a pulsed fashion. Continuous waves can be captured and converted into energy by IoT devices to power backscatter transceivers in IoT devices.

In order to better understand the embodiments of the present application, a network architecture applicable to the embodiments of the present application is described below.

Please refer to FIG. 1a and FIG. 1b. FIG. 1a is a schematic diagram of an IoT device control application in a home scenario provided by an embodiment of the present application. As shown in FIG. 1a, the home scene may include an IoT device 1, an IoT device 2, an IoT device 3, and a control device. Among them, IoT devices can be turned on or off by sensing moving objects or devices, such as robot vacuum cleaners, smart lights, smart curtains, smart air purifiers, smart air conditioners, or smart heaters. The control device may be a mobile terminal device, a wearable terminal device, etc., such as a mobile phone, a tablet computer, or a smart bracelet. As shown in the figure, IoT device 1 takes a smart light as an example, IoT device 2 takes a sweeping robot as an example, IoT device 3 takes a smart curtain as an example, and a control device takes a mobile phone as an example. Of course, the home scene may include more than three IoT devices and more than one control device, which is not limited in this embodiment of the present application. In this application scenario, if the IoT device receives the inquiry signal sent by the control device, it can be turned on or off through a series of operations. That is, when the IoT device detects that the control device is approaching, it will The corresponding on or off operation can be performed. It should be noted that the proximity may refer to the distance between the control device and the IoT device within 10 meters, or the IoT device can receive the signal sent by the control device within the range. For example, the IoT device 1, that is, the smart light, is currently in an off state, and can switch to an on state if a signal sent by the control device is detected. For another example, the IoT device 2, that is, the sweeping robot, is currently in an on state, and can switch to an off state if a signal sent by the control device is detected. Of course, the IoT device 2 does not necessarily have to enter the off state after detecting the signal sent by the control device, and it can continue to work. That is to say, the working state of the IoT device and whether the signal sent by the control device is detected are not unique. Relationships, which can be configured by users, developers, or artificial intelligence systems.

FIG. 1b is a schematic diagram of an IoT device control application in a golf course water spray scene. As shown in Fig. 1b, the golf course water spray scene may also include an IoT device 1, an IoT device 2, an IoT device 3, and a control device. The IoT devices 1 to 3 can all be water spray devices, which are used to spray high-pressure water into the grass, and the IoT devices 1 to 3 can be devices that need to be turned on for a long time . The control device can be mounted or integrated on a golf cart, or worn by a professional driver. When the IoT device 1 detects the signal sent by the control device, it can suspend the current working state, so that the high-pressure water of the IoT device 1 can be prevented from being sprayed onto the golf cart; After the device 1, the IoT device 1 can re-enter the working state to continue irrigating the lawn. Similarly, the IoT device 2 to the IoT device 3 can also implement the same functions as the IoT device 1 has.

Of course, the embodiments of the present application may not be limited to the above home scenarios and golf course water spray scenarios, but can also be adapted to application scenarios in which various Internet of Things devices and control devices work together, which are not limited in the embodiments of the present application.

As shown in FIG. 2a, FIG. 2b, and FIG. 2c, the embodiments of the present application provide hardware architecture diagrams of three types of backscatter transceivers. The backscatter transceiver shown in Figure 2a includes an antenna, RF energy capture, receiver, backscatter transmitter, energy management, and a microprocessor. The microprocessor in the backscattering transceiver in Fig. 2a can output a signal to the Internet of Things device control module, and the Internet of Things device control module can control the on or off of the Internet of Things device. The output signal may be a single binary signal, such as 0 for "off" and 1 for "off". The RF energy capture device in Figure 2a can capture RF energy to power the backscatter transceiver.

The backscatter transceiver shown in Figure 2b includes an antenna, a receiver, a backscatter transmitter, an energy management, and a microprocessor. The backscattering transceiver does not include radio frequency energy capture, and the IoT device includes an IoT device control module and a power supply. Then, the backscattering transceiver is not powered by radio frequency energy capture, but powered by the power source carried by the IoT device.

The backscatter transceiver shown in Figure 2c includes an antenna, RF energy capture, receiver, backscatter transmitter, energy management, and a microprocessor. The IoT device also includes an IoT device control module, a switch and a power supply. The backscatter transceiver device can control the power supply and the Internet of Things device control module to supply power to the backscatter transceiver device through a control switch. When the backscatter transceiver device does not receive the signal sent by the control device, it can control the switch and connect the switch to the control module of the Internet of Things control device. At this time, the power supply is not connected to the backscatter transceiver device, then the Internet of Things The device control module will be in a power-down deep sleep mode. Wherein, the backscatter transceiver device controls the switch by using the radio frequency energy captured by the radio frequency energy.

In this embodiment of the present application, any IoT device shown in FIG. 1a and FIG. 1b may include any one of the three backscattering transceivers shown in FIG. 2a, FIG. 2b and FIG. 2c. Scattering transceiver.

As shown in FIG. 3 , an embodiment of the present application provides a hardware architecture diagram of a control device. The control device may be an intelligent terminal integrated with a radio frequency front end. The RF front end includes an antenna, a transmitter, and a receiver. The control device also includes a modem module and a central processing unit (CPU). In the control device shown in Figure 3, the modem module can transmit continuous waves (CW), and the modem and the RF front-end included in the modem module can transmit and receive Amplitude Shift Keying (ASK) ), Frequency-Shift Keying (FSK) and Phase Shift Keying (PSK) modulated signals. In addition, the modulation and demodulation module shown in FIG. 3 can be integrated in the central processor. Both the central processor and the modulation and demodulation module can be implemented by general-purpose devices such as a microprocessor or a Field Programmable Gate Array (FPGA).

In order to realize close-range, fast, and low-power control of IoT devices through control devices, embodiments of the present application provide a control method and communication device for IoT devices. The control method and communication device are introduced in detail.

Referring to FIG. 4 , FIG. 4 is a schematic flowchart of a method for controlling an Internet of Things device according to an embodiment of the present application. The execution subject of this embodiment may be an IoT device, and the IoT device may include any one of the three types of backscatter transceivers as shown in FIG. 2a , FIG. 2b or FIG. 2c . The method may include the following steps:

410. Receive an inquiry signal sent by the control device.

Specifically, as shown in FIG. 5 , the IoT device can first receive the continuous wave signal sent by the control device with a transmission duration of Tcw1, and then receive an inquiry signal sent by the control device with a transmission duration of Trequest, and then continue to receive the transmission sent by the control device. Continuous wave signal of duration Tcw2. Among them, the continuous wave signal with the transmission duration of Tcw1 means that the IoT device can continue to receive the continuous wave signal within the transmission duration of Tcw1, and the number of continuous wave signals at this time can be one or more; the transmission duration is Trequest inquiry The signal indicates that the IoT device can continue to receive the interrogation signal within the transmission duration of Trequest, and similarly, the interrogation signal can also be one or more; correspondingly, the continuous wave signal of the transmission duration Tcw2 indicates that the IoT device can be transmitted within the transmission duration of Tcw2. Continuously receive continuous wave signals. The process of signal reception as shown in FIG. 5 can be looped nsearch times. That is to say, the IoT device can continuously receive continuous wave signals within the transmission duration of nsearch Tcw1s, continuously receive inquiry signals within the transmission duration of nsearch Trequests, and continue to receive continuous wave signals within the transmission duration of nsearch Tcw2s. . The IoT device can receive at least one continuous wave signal in the total duration of nsearch Tcw1 and nsearch Tcw2. The radio frequency energy capture module in the IoT device can capture continuous wave signals, and convert at least one received continuous wave signal into signal energy, which can supply power to the backscatter transceiver in the IoT device. That is, the IoT device can use the signal energy converted from the received at least one continuous wave signal for backscattering. IoT devices need to continuously receive different signals in different time periods, and the number of different signals in different time periods can be the same or different. Since the IoT device has a certain failure rate in receiving signals, this method can ensure that the IoT device receives enough continuous wave signals to be converted into sufficient energy, and can also ensure that the IoT device receives the inquiry signal.

In a possible implementation manner, for the backscatter transceiver device as shown in FIG. 2b, since the backscatter transceiver device does not include a radio frequency energy capture module, the IoT device including the backscatter transceiver device cannot pass through The continuous wave signal obtains energy, but is supplied by its own power supply to backscatter the signal. Then the IoT device can receive the inquiry signal instead of the continuous wave signal, can continue to receive the inquiry signal within the transmission duration of the Trequest, and can cycle nsearch times, that is, continue to receive the inquiry signal within the transmission duration of nsearch Trequests. By this method, it can be ensured that the IoT device receives the inquiry signal.

420. In response to the inquiry signal, send device information to the control device through a backscattering technology, where the device information includes a device identifier of the Internet of Things device and a first device state.

Specifically, after receiving the inquiry signal, the IoT device can send device information to the control device through backscattering technology and the signal energy converted from at least one continuous wave signal, where the device information can include the device identifier of the IoT device. and the first device state of the IoT device, where the first device state may be the state before the IoT device receives the inquiry signal. Among them, the IoT device can use the continuous wave generated by the IoT device as a carrier to send device information to the control device; the device identifier of the IoT device can be a special identifier (Unique Identifier, UID), the device of the IoT device The state can be the working state of the IoT device, such as on or off.

In a possible implementation manner, for the backscatter transceiver device shown in FIG. 2b, since the backscatter transceiver device does not include a radio frequency energy capture module, the IoT device including the backscatter transceiver device can pass the The power module obtains the signal energy, and then sends the device information to the control device through the backscattering technology and the obtained signal energy.

In a possible implementation manner, before the IoT device sends the device information to the control device through the backscattering technology in response to the inquiry signal, the IoT device may further determine whether to send the device information to the control device. Among them, the IoT device can determine whether to send device information to the control release by judging whether it has the backscattering authority, and if it has the authority, send the device information to the control device. This is because multipath reflection may occur in some application scenarios with complex environments, and different IoT devices will use the same frequency to send signals to the control device through backscattering technology, resulting in IoT devices through backscattering The signals sent by the technology to the control device collide, and the success rate of the control device receiving the signal will also decrease at the same time.

Optionally, the inquiry signal includes a random number instruction, and the IoT device can generate the first random number and the second random number of the IoT device according to the random number instruction, and then obtain the interval between the first random number and the second random number. If the difference is less than 0, it is determined that the IoT device has backscattering authority. The first random number may be a random integer from 0 to n, and the second random number is a random integer greater than 0. When the difference obtained by subtracting the second random number from the first random number is less than 0, it is determined that the IoT device has the backscattering authority. For example, if the first random number is 5 and the second random number is 6, then the difference between the first random number and the second random number is -1. Since -1 is less than 0, it is determined that the IoT device has a reverse To scatter permissions.

Optionally, the IoT device can receive multiple query signals sent by the control device, and can generate a first random number and a second random number according to the random number instruction in the query signal, where the first random number can be 0 to n. , and the second random number is a random integer greater than 0. When an inquiry signal sent by the control device is received, the difference between the first random number and the second random number is used as the updated first random number. If the first random number obtained by the latest update is less than 0, it is determined that the IoT device has the backscattering authority; if the first random number obtained by the latest update is greater than or equal to 0, when the next query signal sent by the control device is received , taking the difference between the first random number obtained by the latest update and the second random number as the first random number after the update, until the first random number obtained by the latest update is less than 0. That is to say, when the IoT device receives an inquiry signal, it can subtract a second random number from the first random number to obtain the updated first random number; when the IoT device receives the next inquiry signal, Then, a second random number is subtracted from the updated first random number, and so on, until the first random number is less than 0, it is determined that the IoT device has the backscattering authority. For example, if the first random number is 10 and the second random number is 3, when the IoT device receives the first query signal, the updated first random number will become 7; after receiving the second query signal, The updated first random number becomes 4; when the third query signal is received, the updated first random number becomes 1; when the fourth query signal is received, the updated first random number becomes -2, the IoT device determines that the IoT device has the backscattering authority when the fourth inquiry signal is received. Through such a method, different IoT devices can have a greater chance of not backscattering device information through the same frequency at the same time, thereby increasing the success rate of the control device receiving device information from different IoT devices. It should be noted that the value of n above can be determined according to dimensions such as the density and total number of IoT devices in the environment where the IoT devices currently belong. Multiple dimensions can intelligently adjust the size of n to prevent some IoT The value of the first random number obtained by the device is too large, and the device cannot have the backscattering authority for a long time.

Optionally, the query signal may also indicate the total number of IoT devices in the environment to which the IoT devices belong. The IoT device may obtain a threshold for the number of IoT devices according to the total number of IoT devices in the environment to which the IoT device belongs. If the number of received interrogation signals reaches the number threshold, it is determined that the IoT device has the backscattering authority. The quantity threshold may be obtained by the user through controlling device settings, may also be intelligently determined by the IoT device analyzing the current environment, or may be set by a technician, which is not limited in this embodiment of the present application. For example, if the total number of IoT devices in the environment to which an IoT device belongs is 5, and the number threshold obtained by the IoT device is 3, then when the third inquiry signal is received, it is determined that the IoT device has a reverse To scatter permissions.

430. Receive the first control signal sent by the control device.

After the IoT device sends the device information to the control device, the control device generates a first control signal of the IoT device. The IoT device may receive a first control signal sent by the control device, where the first control signal includes a device identifier of at least one IoT device. Wherein, the control device may send the control information to the Internet of Things device by means of broadcasting information.

Specifically, as shown in FIG. 6 , the IoT device can first receive the continuous wave signal with the transmission duration Tcw1 sent by the control device, and then receive the control signal with the transmission duration Tcontrol sent by the control device, that is, the first control signal, and then continue Receive the continuous wave signal with the transmission duration Tcw2 sent by the control device. The first control signal whose transmission duration is Tcontrol indicates that the IoT device can continuously receive the first control signal within the transmission duration of Tcontrol. Similarly, the first control signal may also be one or more; as shown in FIG. 6 The process of signal reception can be looped ncontrol times. That is to say, the IoT device can continuously receive continuous wave signals within the transmission duration of ncontrol Tcw1s, continuously receive the first control signal within the transmission duration of ncontrol Tcontrols, and continuously receive continuous wave signals within the transmission duration of ncontrol Tcw2s. wave signal. The IoT device can receive at least one continuous wave signal in the total duration of ncontrol Tcw1 and ncontrol Tcw2. The radio frequency energy capture module in the IoT device can capture continuous wave signals, and convert at least one received continuous wave signal into signal energy, which can supply power to the backscatter transceiver in the IoT device. Through this method, it can be ensured that the IoT device receives enough continuous wave signals to be converted into sufficient energy, and it can also be ensured that the IoT device receives the first control signal.

In a possible implementation manner, for the backscatter transceiver device as shown in FIG. 2b, since the backscatter transceiver device does not include a radio frequency energy capture module, the IoT device including the backscatter transceiver device cannot pass through The continuous wave signal obtains energy, but is supplied by its own power supply to backscatter the signal. Then the IoT device can receive the first control signal instead of the continuous wave signal, can continue to receive the first control signal within the transmission duration of Tcontrol, and can cycle ncontrol times, that is, it continues within the transmission duration of ncontrol Tcontrols. A first control signal is received. Through this method, it can be ensured that the IoT device receives the first control signal.

440. If the first control signal includes the device identifier of the IoT device, switch from the first device state to the second device state according to the first control signal.

Since the first control signal can be sent by the control device through broadcast information, all IoT devices inquired by the control device can receive the first control signal, and if the first control signal includes the IoT device The device identifier, that is, the UID, can respond to the first control signal of the IoT device corresponding to the device identifier. The first control signal can control the IoT device to switch from the first device state to the second device state. The first control signal may be an operation of inverting the state of the Internet of Things device. For example, before responding to the first control signal, the state of the Internet of Things device is the ON state, that is, the first device state, and after responding to the first control signal, the state of the Internet of Things device is the ON state. , the IoT device switches the state to off, that is, the second device state.

In a possible implementation manner, for an IoT device that needs to maintain a state for a long time, if the IoT device switches from the first device state to the second device state according to the first control signal within a preset period of time , if the second control signal to the IoT device is not received, the state is switched from the second device state to the first device state. Wherein, the second control signal may instruct the IoT device to switch from the second device state to the first device state. The IoT device can start a countdown timer after switching from the first device state to the second device state according to the first control signal. If the running time of the countdown timer reaches the preset time Tcount, the IoT device is switched from the second device state to the second device state. The device state is switched to the first device state. For example, for the IoT device 1 in the golf course water spray scene as shown in FIG. 1b, after the IoT device 1 in FIG. 1b receives the first control signal sent by the control device on the golf cart, the The control signal is switched from the on state (water spray state) to the off state (water spray stop state), and the countdown timer is started at the same time. When the running time of the countdown timer reaches the preset time Tcount, the IoT device is switched from an off state (stop water spraying state) to an on state (water spraying state). This is because, when the control device on the golf cart is close to the IoT device 1 , the first control signal can be sent to the IoT device 1 . When the control device on the golf cart is far away from the IoT device 1, the second control signal broadcast by the control device cannot be received by the IoT device 1 because the distance is too far, so that the IoT device 1 will always be in the off state (stop water spray state). Therefore, by setting the method of starting the countdown timer, the IoT device can be switched to the original device state, that is, the first device state in time.

After successfully responding to the first control signal of the Internet of Things device, the Internet of Things device will also send confirmation information to the control device through backscattering technology, where the confirmation information includes the device identification of the Internet of Things device and the state of the second device.

In a possible implementation manner, before successfully responding to the first control signal of the Internet of Things device and sending the confirmation information to the control device by backscattering technology, the Internet of Things device may further determine whether to send confirmation information to the control device. The determination method has been described in detail in Embodiment 420, and details are not repeated here.

Through the embodiments of the present application, after receiving the interrogation signal and the at least one continuous wave signal sent by the control device, the IoT device can backscatter the device information in response to the interrogation signal by using the energy obtained from the at least one continuous wave signal. Then, it receives the first control signal and at least one continuous wave signal sent by the control device, changes the device state of the IoT device at this time according to the first control signal, and finally backscatters the energy obtained from the at least one continuous wave signal. Confirm the information. First, the IoT device can obtain energy from at least one continuous wave signal, thereby reducing the power consumption of the IoT device. Secondly, IoT devices use backscattering technology to send information to control devices, which can reduce the delay of information interaction. Finally, the backscattering technology used by IoT devices can also make the distance measurement between the IoT device and the control device more accurate and can measure shorter distances. Therefore, through the embodiments of the present application, it is possible to control the IoT device in a short distance, quickly and with low power consumption through the control device.

Referring to FIG. 7 , FIG. 7 is a schematic flowchart of another method for controlling an Internet of Things device according to an embodiment of the present application. Wherein, the execution subject of this embodiment may be a control device, and the control device may include the hardware architecture of the control device as shown in FIG. 3 . The method may include the following steps:

710. Send an inquiry signal to at least one IoT device.

Specifically, as shown in FIG. 5 , the control device may first send a continuous wave signal with a transmission duration of Tcw1 to at least one IoT device, then send an inquiry signal with a transmission duration of Trequest, and then continue to send a continuous wave signal with a transmission duration of Tcw2 . The firing process can be looped nsearch times. Wherein, the nsearch may be set by a user or a researcher, or may be intelligently determined by the control device according to the current application scenario environment, which is not limited in this embodiment of the present application. The nsearch intelligently determined by the control device can ensure that at least one IoT device receives the interrogation signal and enough CW signals to capture enough signal energy.

720. Receive at least one piece of device information sent by at least one Internet of Things device in response to the inquiry signal through backscattering technology, where the at least one piece of device information includes a device identifier of each Internet of Things device in the at least one Internet of Things device and the first information of each Internet of Things device. a device state.

After the control device receives the at least one piece of device information sent by the at least one Internet of Things device in response to the inquiry signal through the backscattering technology, the control device may perform information sorting on the at least one piece of device information. Specifically, the control device may acquire, from at least one piece of device information, the device identifier of the IoT device corresponding to each device information, that is, the UID and the device state, that is, on or off. The control device can also calculate the received signal strength indication (Received Signal Strength Indication, RSSI), phase (Phase) and reception time corresponding to different UIDs through the radio frequency front end as shown in Figure 3. The control device can generate a table from this information to record the RSSI, phase, time, and device status of the IoT device corresponding to each UID. For example, as shown in Table 1, the RSSI of the IoT device whose UID is AA001 is -58, the phase is 1.89, the reception time is 12.23.23.798, and the state is off. The control device can count the information of the IoT devices that can be detected in the current environment into the table.

Table 1

730. Generate a first control signal according to at least one device information, where the first control signal includes a device identifier of at least one IoT device, and the first control signal is used to indicate that each device identifier corresponds to the IoT device by the first device of each IoT device. The state switches to the second device state of each IoT device.

By analyzing the RSSI, phase, and receiving time information corresponding to each UID in Table 1, the control device can determine at least one IoT device whose state needs to be changed. For example, as shown in Table 1, if the control device determines that AA001 and AA003 need to be switched to the ON state, and AA002 needs to be switched to the OFF state, it can generate a first control signal according to at least one piece of device information, and use the first control signal to Control at least one IoT device. The control device may determine the corresponding first control signal according to at least one piece of device information in Table 1: {on}{UID[AA001,AA003]}{off}{UID[AA002]}.

740. Send a first control signal to at least one IoT device.

The control device may send the first control signal to the at least one Internet of Things device by broadcasting information. Specifically, as shown in FIG. 6 , the control device may first send a continuous wave signal with a transmission duration of Tcw1 to at least one IoT device, then send a first control signal with a transmission duration of Tcontrol, and then continue to send a continuous wave signal with a transmission duration of Tcw2 wave signal. The launch process can be looped ncontrol times. Wherein, the ncontrol may be set by a user or a researcher, or may be intelligently determined by the control device according to the current application scenario environment, or may be determined according to nsearch, which is not limited in this embodiment of the present application. The ncontrol intelligently determined by the control device can ensure that at least one IoT device receives the first control signal and enough continuous wave signals to capture enough signal energy.

750. Receive at least one confirmation message sent by at least one Internet of Things device, where each confirmation message in the at least one confirmation message includes a device identifier and a second device state of the Internet of Things device corresponding to each confirmation message.

The control device may update the table previously obtained according to the at least one device information according to the received at least one confirmation message. For example, if the control device learns from at least one confirmation message that AA001 and AA003 in Table 1 have been switched to the ON state, and AA002 has been switched to the OFF state, the content in Table 1 can be updated to obtain the following Table 2 :

Table 2

Through the embodiments of the present application, the control device can send an inquiry signal and at least one continuous wave signal to at least one Internet of Things device, and the at least one continuous wave signal can provide signal energy for at least one Internet of Things device, so that the Internet of Things device can pass the reaction At least one device information is sent to the control device to the scattering technique and the signal energy. The control device can generate a first control signal according to the at least one device information, and the first control signal can change the device state of the IoT device whose device state needs to be changed among the at least one IoT device. The control device may receive at least one confirmation message sent by the IoT device, thereby updating the saved device state of each IoT device. Since the transmitter included in the control device does not contain amplifiers to provide signal gain during the period, the communication distance between such a control device and the IoT device is short and can be communicated within a range of less than 10 meters. Therefore, the position information of the IoT device is implied in the backscattered signal of the IoT device, and the control device can control the IoT device in a smaller range more accurately.

Referring to FIG. 8 , FIG. 8 is a schematic flowchart of still another method for controlling an Internet of Things device according to an embodiment of the present application. Wherein, the executive body of this embodiment includes a control device and at least one Internet of Things device. In practical applications, the number of IoT devices may be more than three, and the embodiment of the present application uses three IoT devices, namely, IoT device 1, IoT device 2, and IoT device 3 as an example. The control method of the Internet of Things device may include the following steps:

810. The control device sends an inquiry signal to at least one IoT device.

820. At least one IoT device sends at least one piece of device information to the control device by using the backscatter technology.

830. The control device generates a first control signal according to at least one piece of device information.

840. The control device sends a first control signal to at least one Internet of Things device.

850. If each IoT device in the at least one IoT device detects that the first control signal includes the device identifier of the IoT device, it switches from the first device state to the second device state according to the first control signal.

860. At least one IoT device sends at least one confirmation message to the control device by using the backscatter technology.

Through the embodiments of the present application, the control device and the IoT device can perform signal interaction through the backscattering technology, which can inherit the advantages of low power consumption, low delay and accurate distance measurement of the backscattering technology, so that the control device can be close-range and fast. , Control IoT devices with low power consumption.

Please refer to FIG. 9. FIG. 9 is a schematic diagram of a unit of a communication apparatus provided by an embodiment of the present application. The control apparatus of the IoT device shown in FIG. 9 may be used to perform some or all of the functions in the method embodiments described in the above-mentioned FIG. 4 , FIG. 7 , and FIG. 8 . The device may be an Internet of Things device or a control device, or a device in an Internet of Things device or a control device, or a device that can be matched and used with the Internet of Things device or the control device. The logical structure of the apparatus may include: a transceiver unit 910 and a processing unit 920 . When the device is applied to IoT devices:

a transceiver unit 910, configured to receive an inquiry signal sent by the control device;

The above-mentioned transceiver unit 910 is further configured to send device information to the control device through backscattering technology in response to the inquiry signal, where the device information includes the device identifier of the IoT device and the first device state;

The above-mentioned transceiver unit 910 is further configured to receive the first control signal sent by the control device;

The processing unit 920 is configured to switch from the first device state to the second device state according to the first control signal if the first control signal includes the device identifier of the IoT device.

In a possible implementation manner, the above-mentioned transceiver unit 910 is further configured to receive at least one continuous wave signal sent by the control device before sending the device information to the control device through the backscatter technology in response to the inquiry signal; Signal energy, which is used to power IoT devices.

In a possible implementation manner, if the first control signal includes the device identifier of the IoT device, after switching from the first device state to the second device state according to the first control signal, the above-mentioned transceiver unit 910 is further configured to send a The device sends confirmation information, where the confirmation information includes the device identification of the IoT device and the state of the second device.

In a possible implementation manner, the above-mentioned transceiver unit 910 is further configured to receive at least one continuous wave signal sent by the control device before sending the confirmation information to the control device; the above-mentioned processing unit 920 is further configured to obtain a signal through the at least one continuous wave signal Energy, signal energy is used to power IoT devices.

In a possible implementation manner, if the first control signal includes the device identifier of the IoT device, after switching from the first device state to the second device state according to the first control signal, if the first control signal is switched from the first device state to the second device state according to the first control signal If the second control signal to the IoT device is not received within a preset time period after the device state is switched to the second device state, the transceiver unit 910 is further configured to switch from the second device state to the first device state.

In a possible implementation manner, the interrogation signal further includes a random number instruction.

In a possible implementation manner, before sending the device information to the control device through backscattering technology in response to the inquiry signal, the above-mentioned processing unit 920 is further configured to generate a first random number and a second random number according to the random number instruction; The difference between the random number and the second random number; if the difference is less than 0, it is determined that the above-mentioned transceiver unit 910 is also used to send device information to the control device.

In a possible implementation manner, before sending device information to the control device through backscattering technology in response to the query signal, the transceiver unit 910 is further configured to receive multiple query signals sent by the control device; the processing unit 920 is further configured to generate The first random number and the second random number; when receiving an inquiry signal sent by the control device, the difference between the first random number and the second random number is used as the updated first random number; The first random number is greater than or equal to 0, then when the next inquiry signal sent by the control device is received, the difference between the first random number and the second random number obtained by the latest update is taken as the updated first random number. until the first random number obtained by the latest update is less than 0; if the first random number obtained by the latest update is less than 0, it is determined that the above-mentioned transceiver unit 910 is also used for sending device information to the control device.

In a possible implementation manner, the interrogation signal is also used to indicate the total number of IoT devices in the environment to which the IoT devices belong.

In a possible implementation manner, before sending device information to the control device through backscattering technology in response to the query signal, the transceiver unit 910 is further configured to receive multiple query signals sent by the control device; the processing unit 920 is further configured to The total number of IoT devices in the environment to which the IoT devices belong, and the threshold for the number of IoT devices is obtained; if the number of received inquiry signals reaches the number threshold, it is determined to send device information to the control device.

When the device is used to control equipment:

A transceiver unit 910, sending an inquiry signal to at least one IoT device;

The above-mentioned transceiver unit 910 is further configured to receive at least one device information sent by at least one Internet of Things device through backscattering technology, where the at least one device information includes the device identifier of each Internet of Things device in the at least one Internet of Things device and each Internet of Things device. the first device state;

The processing unit 920 is configured to generate a first control signal according to at least one device information, where the first control signal includes a device identifier of at least one IoT device, and the first control signal is used to indicate that each device identifier corresponds to the IoT device by each IoT device. The first device state is switched to the second device state of each IoT device;

The above-mentioned transceiver unit 910 is further configured to send a first control signal to at least one IoT device;

The above-mentioned transceiver unit 910 is further configured to receive at least one confirmation message sent by at least one IoT device, and each confirmation message in the at least one confirmation message includes a device identifier and a second device state of the IoT device corresponding to each confirmation message.

In a possible implementation manner, the above-mentioned transceiver unit 910 is further configured to send at least one continuous wave signal to at least one IoT device before receiving at least one device information sent by at least one IoT device through backscattering technology, at least one Continuous wave signals are used to provide signal energy.

In a possible implementation manner, the above-mentioned transceiver unit 910 is further configured to send at least one continuous wave signal to at least one IoT device before receiving at least one confirmation message sent by at least one IoT device, and the at least one continuous wave signal is used for Provides signal energy.

Please refer to FIG. 10. FIG. 10 is a simplified schematic diagram of the physical structure of a communication device provided by an embodiment of the present application. The device includes a processor 1010, a memory 1020, and a communication interface 1030. The processor 1010, the memory 1020, and the communication interface 1030 pass through One or more communication bus connections.

The processor 1010 is configured to support the communication device to perform functions corresponding to the methods in FIGS. 2 , 5 and 8 . The processor 1010 may be a central processing unit (CPU), a network processor (NP), a hardware chip or any combination thereof.

The memory 1020 is used to store program codes and the like. The memory 1020 may include volatile memory (volatile memory), such as random access memory (RAM); the memory 1020 may also include non-volatile memory (non-volatile memory), such as read-only memory (read-only memory) only memory, ROM), flash memory (flash memory), hard disk drive (HDD) or solid-state drive (solid-state drive, SSD); the memory 1020 may also include a combination of the above-mentioned types of memory.

The communication interface 1030 is used for sending and receiving data, information or messages, etc., and can also be described as a transceiver, a transceiver circuit, and the like.

In this embodiment of the present application, when the control apparatus of the IoT device is applied to the IoT device, the processor 1010 may call the program code stored in the memory 1020 to perform the following operations:

The control communication interface 1030 receives the inquiry signal sent by the control device;

The control communication interface 1030 sends device information to the control device through backscattering technology in response to the inquiry signal, where the device information includes the device identifier of the IoT device and the first device state;

The control communication interface 1030 receives the first control signal sent by the control device;

The processor 1010 calls the program code stored in the memory 1020 to switch from the first device state to the second device state according to the first control signal if the first control signal includes the device identifier of the IoT device.

In a possible implementation manner, the control communication interface 1030 receives at least one continuous wave signal sent by the control device before sending the device information to the control device through the backscatter technology in response to the inquiry signal; obtains the signal energy through the at least one continuous wave signal, Signal energy is used to power IoT devices.

In a possible implementation manner, if the first control signal includes the device identifier of the IoT device, after switching from the first device state to the second device state according to the first control signal, the control communication interface 1030 sends an acknowledgement to the control device information, and the confirmation information includes the device identification of the IoT device and the state of the second device.

In a possible implementation manner, before the control communication interface 1030 sends the confirmation information to the control device, it receives at least one continuous wave signal sent by the control device; the processor 1010 invokes the program code stored in the memory 1020 to obtain through at least one continuous wave signal Signal energy, which is used to power IoT devices.

In a possible implementation manner, if the first control signal includes the device identifier of the IoT device, after switching from the first device state to the second device state according to the first control signal, if the first control signal is switched from the first device state to the second device state according to the first control signal Within a preset period of time after the device state is switched to the second device state, if no second control signal to the IoT device is received, the communication interface 1030 is controlled to switch from the second device state to the first device state.

In a possible implementation manner, before sending the device information to the control device through the backscattering technique in response to the inquiry signal, the processor 1010 invokes the program code stored in the memory 1020 to generate the first random number and the second random number according to the random number instruction ; Obtain the difference between the first random number and the second random number; if the difference is less than 0, determine that the control communication interface 1030 sends device information to the control device.

In a possible implementation manner, before sending device information to the control device through backscattering technology in response to the query signal, the control communication interface 1030 receives multiple query signals sent by the control device; the processor 1010 calls the program code stored in the memory 1020 Generate a first random number and a second random number; when receiving an inquiry signal sent by the control device, use the difference between the first random number and the second random number as the updated first random number; if the latest update The obtained first random number is greater than or equal to 0, then when the next inquiry signal sent by the control device is received, the difference between the recently updated first random number and the second random number is taken as the updated first random number. A random number until the first random number obtained by the latest update is less than 0; if the first random number obtained by the latest update is less than 0, it is determined that the control communication interface 1030 sends device information to the control device.

In a possible implementation manner, before sending device information to the control device through backscattering technology in response to the query signal, the control communication interface 1030 receives multiple query signals sent by the control device; the processor 1010 calls the program code stored in the memory 1020 According to the total number of IoT devices in the environment to which the IoT devices belong, the number threshold of IoT devices is obtained; if the number of received inquiry signals reaches the number threshold, it is determined to send device information to the control device.

In this embodiment of the present application, when the apparatus is applied to a control device, the processor 1010 may call program codes stored in the memory 1020 to perform the following operations:

controlling the communication interface 1030 to send an inquiry signal to at least one IoT device;

The control communication interface 1030 receives at least one piece of device information sent by at least one Internet of Things device through backscattering technology, where the at least one piece of device information includes a device identifier of each Internet of Things device in the at least one Internet of Things device and a first value of each Internet of Things device. equipment status;

The processor 1010 invokes the program code stored in the memory 1020 to generate a first control signal according to at least one piece of device information, the first control signal includes a device identifier of at least one IoT device, and the first control signal is used to indicate that each device identifier corresponds to the IoT device Switch from the first device state of each IoT device to the second device state of each IoT device;

controlling the communication interface 1030 to send a first control signal to at least one IoT device;

The control communication interface 1030 receives at least one confirmation message sent by at least one IoT device, and each confirmation message in the at least one confirmation message includes a device identifier and a second device state of the IoT device corresponding to each confirmation message.

In a possible implementation manner, the control communication interface 1030 sends at least one continuous wave signal, at least one continuous wave signal to the at least one IoT device before receiving the at least one device information sent by the at least one IoT device through the backscatter technology Used to provide signal energy.

In a possible implementation manner, the control communication interface 1030 sends at least one continuous wave signal to the at least one IoT device before receiving the at least one confirmation message sent by the at least one IoT device, where the at least one continuous wave signal is used to provide signal energy .

It should be noted that, in the foregoing embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

The steps in the method of the embodiment of the present invention may be adjusted, combined and deleted in sequence according to actual needs.

The units in the processing device in the embodiment of the present invention may be combined, divided, and deleted according to actual needs.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center over a wire (e.g. coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.) to another website site, computer, server or data center. A computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, or the like that contains one or more of the available mediums integrated. Useful media may be magnetic media (eg, floppy disks, storage disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), among others.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. Scope.

Claims

A control method for an Internet of Things device, characterized in that, when applied to an Internet of Things device, the method includes:

Receive the inquiry signal sent by the control device;

Sending device information to the control device through backscattering technology in response to the inquiry signal, the device information including the device identifier and the first device state of the Internet of Things device;

receiving a first control signal sent by the control device;

If the first control signal includes the device identifier of the Internet of Things device, switching from the first device state to the second device state is performed according to the first control signal.
The method according to claim 1, wherein before the responding to the query signal and sending the device information to the control device by using a backscatter technique, the method further comprises:

receiving at least one continuous wave signal sent by the control device;

Signal energy is obtained from the at least one continuous wave signal, and the signal energy is used to power the Internet of Things device.
The method according to claim 1, wherein if the first control signal includes a device identifier of the Internet of Things device, after switching from the first device state to the second device state according to the first control signal , the method also includes:

Send confirmation information to the control device, where the confirmation information includes the device identification of the Internet of Things device and the state of the second device.
The method according to claim 3, wherein before the sending confirmation information to the control device, the method further comprises:

receiving at least one continuous wave signal sent by the control device;

Signal energy is obtained from the at least one continuous wave signal, and the signal energy is used to power the Internet of Things device.
The method according to claim 1, wherein if the first control signal includes a device identifier of the Internet of Things device, switching from the first device state to the first device state according to the first control signal After the second device state, the method further includes:

If the second control signal to the IoT device is not received within a preset period of time after switching from the first device state to the second device state according to the first control signal, the second device The state switches to the first device state.
The method according to claim 1, wherein the interrogation signal further comprises a random number instruction;

Before the sending device information to the control device through the backscattering technique in response to the interrogation signal, the method further includes:

generating a first random number and a second random number according to the random number instruction;

obtaining the difference between the first random number and the second random number;

If the difference is less than 0, it is determined to send the device information to the control device.
The method according to claim 1, wherein before the device information is sent to the control device by backscattering technology in response to the interrogation signal, the method further comprises:

receiving multiple interrogation signals sent by the control device;

generating a first random number and a second random number;

When receiving an inquiry signal sent by the control device, use the difference between the first random number and the second random number as the updated first random number;

If the first random number obtained by the latest update is greater than or equal to 0, when the next query signal sent by the control device is received, the difference between the first random number obtained by the latest update and the second random number will be calculated The value is used as the first random number after the update, until the first random number obtained by the latest update is less than 0;

If the first random number obtained by the latest update is less than 0, it is determined to send device information to the control device.
The method according to claim 1, wherein the query signal is further used to indicate the total number of IoT devices in the environment to which the IoT device belongs;

Before the sending device information to the control device through the backscattering technique in response to the interrogation signal, the method further includes:

receiving multiple interrogation signals sent by the control device;

Obtain the threshold of the number of IoT devices according to the total number of IoT devices in the environment to which the IoT devices belong;

If the number of the received interrogation signals reaches the number threshold, it is determined to send device information to the control device.
A control method for an Internet of Things device, characterized in that, when applied to a control device, the method includes:

sending an interrogation signal to at least one IoT device;

Receive at least one piece of device information sent by the at least one Internet of Things device through backscattering technology, where the at least one piece of device information includes a device identifier of each Internet of Things device in the at least one Internet of Things device and each Internet of Things device the first device state of the device;

A first control signal is generated according to the at least one device information, the first control signal includes a device identifier of the at least one IoT device, and the first control signal is used to indicate that each of the device identifiers corresponds to the IoT device by The first device state of each IoT device is switched to the second device state of each IoT device;

sending a first control signal to the at least one IoT device;

At least one confirmation message sent by the at least one Internet of Things device is received, and each confirmation message in the at least one confirmation message includes a device identifier and a second device state of the Internet of Things device corresponding to the each confirmation message.
The method according to claim 9, wherein before the receiving at least one piece of device information sent by at least one IoT device through a backscatter technology, the method further comprises:

At least one continuous wave signal is sent to the at least one Internet of Things device, the at least one continuous wave signal being used to provide signal energy.
The method according to claim 9, wherein before the receiving at least one confirmation message sent by the at least one Internet of Things device, the method further comprises:

At least one continuous wave signal is sent to the at least one Internet of Things device, the at least one continuous wave signal being used to provide signal energy.
A communication device, characterized by comprising a processor, a memory and a user interface, wherein the processor, the memory and the user interface are connected to each other, wherein the memory is used to store a computer program, and the computer program includes Program instructions, the processor is configured to invoke the program instructions to execute the control method of the Internet of Things device as claimed in any one of claims 1 to 8, or as claimed in any one of claims 9 to 11 The control method of the Internet of Things device described above.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores one or more instructions, and the one or more instructions are adapted to be loaded by a processor and execute any one of claims 1 to 8 The control method of the Internet of Things device according to one, or the control method of the Internet of Things device according to any one of claims 9 to 11.