WO2020119724A1

WO2020119724A1 - Communication method, communication apparatus, and storage medium

Info

Publication number: WO2020119724A1
Application number: PCT/CN2019/124609
Authority: WO
Inventors: 吴涛; 贾嘉; 王倩
Original assignee: 华为技术有限公司
Priority date: 2018-12-14
Filing date: 2019-12-11
Publication date: 2020-06-18
Also published as: CN111328127A; CN111328127B

Abstract

Embodiments of the present application provide a communication method, a communication apparatus, and a storage medium. The method comprises: a network device sends a beacon frame over a wireless channel of a wireless local area network, the beacon frame comprising indication information, and the indication information being used for indicating a communication process in which the network device communicates with an Internet of things device within the coverage range of the network device using a back reflection mode over the wireless channel of the wireless local area network; the network device and the Internet of things device carry out the communication process over the wireless channel. By enabling a network device to communicate with an Internet of things device using a back reflection mode over a wireless channel of a wireless local area network, a communication distance between the network device and the Internet of things device is increased, so that the network device is able to normally communicate with the Internet of things device without approaching the Internet of things device, the communication efficiency between the network device and the Internet of things device is improved, and the communication requirements of the Internet of things are satisfied.

Description

Communication method, communication device and storage medium

This application requires the priority of the Chinese patent application filed on December 14, 2018 in the Chinese Patent Office with the application number 2018115327809 and the application name as "communication method, communication device and storage medium", the entire content of which is incorporated by reference in this application in.

Technical field

This application relates to the field of communication technology, and in particular to a communication method, a communication device, and a storage medium.

Background technique

Back reflection (Modulated Backscatter) is a low-cost, low-power wireless communication method. Devices that communicate through back reflections send information by modulating radio frequency signals in the environment. Radio frequency signals in the environment include wireless TV signals, broadcast signals, signals sent by mobile communication stations, signals sent by WiFi APs (routers), and dedicated readers. The signal sent by the card reader.

In the prior art, the most widely used back reflection technology is radio frequency identification (Radio Frequency Identification, RFID) technology. In RFID technology, both parties of communication include a card reader and a tag, where the card reader includes a receiver and a radio frequency (RF) signal source, the tag needs to be close to the card reader, and is obtained through the RF signal sent by the RF signal source energy. After the tag gains energy, the tag and the card reader communicate via back reflection.

However, with the continuous development of the Internet of Things (Internet of Things, IOT), the Internet of Everything is required, and the radio frequency identification technology requires the reader and the tag to be close to work. Therefore, the radio frequency identification technology cannot meet the communication needs of the Internet of Things.

Summary of the invention

The present application provides a communication method, a communication device, and a storage medium to improve the communication efficiency of network devices and Internet of Things devices and meet the communication needs of the Internet of Things.

In a first aspect, the present application provides a communication method, the method includes: a network device sends a beacon frame on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used to indicate the network A communication process in which the device and the Internet of Things device within the coverage of the network device communicate on the wireless channel of the wireless local area network using a back reflection method. Further, the network device and the Internet of Things device are in the wireless The communication process is performed on the channel. The solution provided by this embodiment increases the communication distance between the network device and the Internet of Things device, so that the network device and the Internet of Things device can communicate normally without being close, thereby improving the communication efficiency of the network device and the Internet of Things device, Meet the communication needs of the Internet of Things.

In a possible design, before the network device sends a beacon frame on a wireless channel of a wireless local area network, the method further includes: the network device controls a radio frequency signal source to send a radio frequency signal, and the radio frequency signal is used to The Internet of Things device is charged. The solution provided by this embodiment can prevent the IoT device from working normally due to insufficient power, so that the IoT device can be charged without battery power supply, saving power resources.

In a possible design, before the network device sends a beacon frame on a wireless channel of a wireless local area network, the method further includes: the network device uses a wireless local area network communication method to a terminal within the coverage of the network device Sending preamble information, the preamble information includes the time required for the network device and the Internet of Things device to communicate in the back reflection mode to occupy the wireless channel. Through the solution provided in this embodiment, a terminal within the coverage of the network device can be prompted, and the time required for the network device and the Internet of Things device to communicate using the back reflection method occupies the wireless channel to prevent the terminal from being in the time Network resource consumption caused by sending information to the network device internally but the network device cannot communicate with the terminal normally.

In a possible design, the communication process is a scheduling access process; the network device and the Internet of Things device performing the communication process on the wireless channel include: the network device is in the wireless Sending a scheduling frame to at least one first Internet of Things device on the channel, the scheduling frame including identification information of the at least one first Internet of Things device, the first Internet of Things device is an object that has been registered in the network device Networked device; the network device receives on the wireless channel the first data sent by the at least one first Internet of Things device using the back reflection method. Through the solution provided in this embodiment, the network device can specify the Internet of Things device to report data, and the network device can manage and manage the Internet of Things device.

In a possible design, the network device sending a scheduling frame to at least one first Internet of Things device on the wireless channel includes: the network device sending the scheduling frame to other Internet of Things devices on the wireless channel A scheduling frame, the other IoT device is used to forward the scheduling frame to the at least one first IoT device; the network device receives the at least one first IoT device on the wireless channel The first data sent by the back reflection method includes: the network device receives, on the wireless channel, the first data reported by the at least one first IoT device and forwarded by the at least one first IoT device on the wireless channel.一数据。 One data. With the solution provided in this embodiment, network devices that are far away and the first Internet of Things device can communicate normally, ensuring the reliability of communication.

In a possible design, the communication process is a random access process; the network device and the Internet of Things device performing the communication process on the wireless channel include: the network device is in the wireless Receiving on the channel at least one registration request frame sent by the second IoT device using the back reflection method, the registration request frame including at least identification information of the second IoT device, the second IoT device is not in Internet of Things devices registered in the network device.

In a possible design, after the network device receives a registration request frame sent by at least one second Internet of Things device on the wireless channel, the method further includes: the network device The at least one second Internet of Things device sends a registration response frame; the network device receives, on the wireless channel, second data sent by the at least one second Internet of Things device using the back reflection method.

In a possible design, the network device receiving, on the wireless channel, the second data sent by the at least one second Internet of Things device using the back reflection method includes: the network device is in the wireless The channel receives second data reported by the at least one second IoT device and forwarded by the other IoT device using the back reflection method.

In a possible design, the registration request frame further includes second data reported by the second IoT device to the network device.

In a possible design, the network device includes the radio frequency signal source.

In a possible design, the network device controlling the radio frequency signal source to send the radio frequency signal includes: the network device sending trigger information to the radio frequency signal source, and the trigger information is used to trigger the radio frequency signal source to send Describe the RF signal.

In a possible design, the preamble information includes the trigger information.

In a second aspect, the present application provides a communication method, the method including: a first IoT device receives a beacon frame sent by a network device on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information A communication process for instructing the network device and the first Internet of Things device to communicate on the wireless channel of the wireless local area network using back reflection; the first Internet of Things device and the network device are in The communication process is performed on the wireless channel.

In a possible design, before the first IoT device receives the beacon frame sent by the network device on the wireless channel of the wireless local area network, the method further includes: the first IoT device receives the radio frequency signal source and sends The radio frequency signal is used to charge the first Internet of Things device.

In a possible design, the communication process is a scheduling access process; the communication process between the first Internet of Things device and the network device on the wireless channel includes: the first Internet of Things The device receives a scheduling frame sent by the network device on the wireless channel, the scheduling frame includes identification information of the first IoT device, and the first IoT device is already registered in the network device Internet of Things device; the first Internet of Things device sends the first data to the network device in the back reflection mode on the wireless channel.

In a possible design, the first IoT device receiving the scheduling frame sent by the network device on the wireless channel includes: the first IoT device receiving other IoT on the wireless channel A scheduling frame of the network device forwarded by the device; the first IoT device sending the first data to the network device using the back reflection method on the wireless channel includes: The first channel is used to send the first data to other IoT devices on the wireless channel, and the other IoT devices are used to forward the first data to the network device.

In a third aspect, the present application provides a communication method, including: a second IoT device receiving a beacon frame sent by a network device on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used for A communication process instructing the network device and the second Internet of Things device to communicate on the wireless channel of the wireless local area network using back reflection; the second Internet of Things device and the network device are in the wireless The communication process is performed on the channel.

In a possible design, before the second IoT device receives the beacon frame sent by the network device on the wireless channel of the wireless local area network, the method further includes: receiving, by the second IoT device, a radio frequency signal source The radio frequency signal is used to charge the second Internet of Things device.

In a possible design, the communication process is a random access process; the second IoT device and the network device performing the communication process on the wireless channel include: the second IoT The device sends the registration request frame to the network device using the back reflection method on the wireless channel, the registration request frame includes at least identification information of the second IoT device, and the second IoT device is not Internet of Things devices registered in the network device.

In a possible design, after the second IoT device sends the registration request frame to the network device using the back reflection method on the wireless channel, the second IoT device also includes: Receiving a registration response frame sent by the network device on the wireless channel; the second Internet of Things device sending the second data to the network device in the back reflection mode on the wireless channel.

In a possible design, the second IoT device sending the second data to the network device on the wireless channel using the back reflection method includes: the second IoT device is in the wireless The second data is sent to other IoT devices on the channel using the back reflection method, and the other IoT devices are used to forward the second data to the network device.

According to a fourth aspect, the present application provides a communication device, including: a transceiver module, configured to send a beacon frame on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used to indicate the communication A communication process in which a device and an Internet of Things device within the coverage of the communication device communicate on the wireless channel of the wireless local area network using a back reflection method; and perform the communication with the Internet of Things device on the wireless channel Communication process.

In a possible design, the communication device further includes: a control module for the transceiver module to control a radio frequency signal source to send a radio frequency signal before sending a beacon frame on a wireless channel of a wireless local area network, the radio frequency signal is used To charge the IoT device.

In a possible design, the transceiver module is further configured to: before sending the beacon frame on the wireless channel of the wireless local area network, use wireless local area network communication to send the preamble information to the terminal within the coverage of the communication device, the The preamble information includes the time required for the communication apparatus and the Internet of Things device to communicate in the back reflection mode to occupy the wireless channel.

In a possible design, the communication process is a scheduling access process; when the transceiver module and the Internet of Things device perform the communication process on the wireless channel, they are specifically used to: Sending a scheduling frame to at least one first Internet of Things device, the scheduling frame including identification information of the at least one first Internet of Things device, the first Internet of Things device is an Internet of Things registered in the communication device Device; receiving on the wireless channel the first data sent by the at least one first Internet of Things device using the back reflection method.

In a possible design, when the transceiver module sends a scheduling frame to at least one first IoT device on the wireless channel, it is specifically used to: send the scheduling to other IoT devices on the wireless channel Frame, the other IoT device is used to forward the scheduling frame to the at least one first IoT device; the transceiver module receives the at least one first IoT device on the wireless channel using the The first data sent by the back reflection method is specifically used to receive the first data forwarded by the at least one first IoT device and reported by the at least one first IoT device in the back reflection mode on the wireless channel. .

In a possible design, the communication process is a random access process; when the transceiver module and the Internet of Things device perform the communication process on the wireless channel, they are specifically used to: Receive at least one registration request frame sent by the second IoT device using the back reflection method, the registration request frame includes at least identification information of the second IoT device, the second IoT device is not in The Internet of Things device registered in the communication device.

In a possible design, after the transceiver module receives a registration request frame sent by at least one second IoT device on the wireless channel, the transceiver module is further configured to: send the request to the wireless channel on the wireless channel. At least one second Internet of Things device sends a registration response frame; receiving second data sent by the at least one second Internet of Things device using the back reflection method on the wireless channel.

In a possible design, when the transceiver module receives, on the wireless channel, the second data sent by the at least one second Internet of Things device using the back reflection method, it is specifically used to: Receiving second data reported by the at least one second IoT device and forwarded by the other IoT device using the back reflection method.

In a possible design, the registration request frame further includes second data reported by the second IoT device to the communication device.

In a possible design, the communication device includes the radio frequency signal source.

In a possible design, when the control module controls the radio frequency signal source to send a radio frequency signal, it is specifically used to control the transceiver module to send trigger information to the radio frequency signal source, and the trigger information is used to trigger the radio frequency The signal source sends the radio frequency signal.

According to a fifth aspect, the present application provides a communication apparatus, including: a transceiver module configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used to A communication process instructing the network device and the communication device to perform a back reflection on the wireless channel of the wireless local area network; and performing the communication process on the wireless channel with the network device.

In a possible design, before the transceiver module receives the beacon frame sent by the network device on the wireless channel of the wireless local area network, it is also used to: receive the radio frequency signal sent by the radio frequency signal source, and the radio frequency signal is used to The communication device is charged.

In a possible design, the communication process is a scheduling access process; when the transceiver module and the network device perform the communication process on the wireless channel, they are specifically used to: on the wireless channel Receiving a scheduling frame sent by the network device, the scheduling frame includes identification information of the communication device, the communication device is an Internet of Things device that has been registered in the network device; Back reflection mode sends the first data to the network device.

In a possible design, when the transceiver module receives the scheduling frame sent by the network device on the wireless channel, it is specifically used to: receive the network device forwarded by another Internet of Things device on the wireless channel Scheduling frame; when the transceiver module uses the back reflection mode to send the first data to the network device on the wireless channel, it is specifically used to: use the back reflection mode to other objects on the wireless channel The networked device sends the first data, and other Internet of Things devices are used to forward the first data to the network device.

In a sixth aspect, the present application provides a communication apparatus, including: a transceiver module, configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used to A communication process instructing the network device and the communication device to perform a back reflection on the wireless channel of the wireless local area network; and performing the communication process on the wireless channel with the network device.

In a possible design, the communication process is a random access process; when the transceiver module and the network device perform the communication process on the wireless channel, they are specifically used to: on the wireless channel A registration request frame is sent to the network device by using the back reflection method, and the registration request frame includes at least identification information of the communication device, and the communication device is an Internet of Things device that is not registered in the network device.

In a possible design, after the transceiver module sends the registration request frame to the network device on the wireless channel by using the back reflection method, it is further used to: receive the network device on the wireless channel Sending a registration response frame; sending the second data to the network device in the back reflection mode on the wireless channel.

In a possible design, when the transceiver module uses the back reflection mode to send the second data to the network device on the wireless channel, it is specifically used to: use the back reflection on the wireless channel Sending the second data to other IoT devices in a manner that is used to forward the second data to the network device.

In a possible design, the registration request frame further includes second data reported by the communication apparatus to the network device.

In a seventh aspect, the present application provides a communication device, including a processor and a transceiver, and the processor and the transceiver communicate with each other through an internal connection; the processor is used to generate a beacon frame, and the beacon frame includes indication information. The instruction information is used to instruct the communication device to communicate with the Internet of Things equipment within the coverage area of the communication device using a back reflection method on the wireless channel of the wireless local area network; the transceiver is used in the wireless local area network Sending the beacon frame on the wireless channel, and performing the communication process on the wireless channel with the Internet of Things device.

In a possible design, the processor is further configured to: before the transceiver sends the beacon frame on the wireless channel of the wireless local area network, control the RF signal source to send the RF signal, the The radio frequency signal is used to charge the Internet of Things device.

In a possible design, before the transceiver transmits the beacon frame on the wireless channel of the wireless local area network, it is also used to: use a wireless local area network communication method to a terminal within the coverage of the communication device Sending preamble information, the preamble information includes the time required for the communication device and the Internet of Things device to communicate in the back reflection mode to occupy the wireless channel.

In a possible design, the communication process is a scheduling access process; when the transceiver and the Internet of Things device perform the communication process on the wireless channel, they are specifically used for: Sending a scheduling frame to at least one first Internet of Things device, the scheduling frame including identification information of the at least one first Internet of Things device, the first Internet of Things device is an Internet of Things registered in the communication device Device; receiving on the wireless channel the first data sent by the at least one first Internet of Things device using the back reflection method.

In a possible design, when the transceiver sends a scheduling frame to at least one first IoT device on the wireless channel, it is specifically used to: send the scheduling to other IoT devices on the wireless channel Frame, the other IoT device is used to forward the scheduling frame to the at least one first IoT device; the transceiver receives the at least one first IoT device on the wireless channel using the The first data sent by the back reflection method is specifically used to receive the first data forwarded by the at least one first IoT device and reported by the at least one first IoT device in the back reflection mode on the wireless channel. .

In a possible design, the communication process is a random access process; when the transceiver and the Internet of Things device perform the communication process on the wireless channel, they are specifically used to: Receive at least one registration request frame sent by the second IoT device using the back reflection method, the registration request frame includes at least identification information of the second IoT device, the second IoT device is not in The Internet of Things device registered in the communication device.

In a possible design, after the transceiver receives a registration request frame sent by at least one second IoT device on the wireless channel, it is also used to: send the at least one second The Internet of Things device sends a registration response frame; receiving on the wireless channel the second data sent by the at least one second Internet of Things device using the back reflection method.

In a possible design, when the transceiver receives the second data sent by the at least one second IoT device using the back reflection method on the wireless channel, it is specifically used to: Receiving second data reported by the at least one second IoT device and forwarded by the other IoT device using the back reflection method.

In a possible design, when the processor controls the radio frequency signal source to send a radio frequency signal, it is specifically used to: send trigger information to the radio frequency signal source through the transceiver, and the trigger information is used to trigger the radio frequency The signal source sends the radio frequency signal.

In an eighth aspect, the present application provides a communication device, including: a processor and a transceiver, the processor and the transceiver communicate with each other through an internal connection; the transceiver is used to receive a beacon sent by a network device on a wireless channel of a wireless local area network Frame, the beacon frame includes indication information used to instruct the network device and the communication device to communicate on the wireless channel of the wireless local area network using a back reflection method to communicate; The network device performs the communication process on the wireless channel.

In a possible design, before the transceiver receives the beacon frame sent by the network device on the wireless channel of the wireless local area network, it is also used to: receive the radio frequency signal sent by the radio frequency signal source, and the radio frequency signal is used to The communication device is charged.

In a possible design, the communication process is a scheduling access process; when the transceiver and the network device perform the communication process on the wireless channel, they are specifically used to: on the wireless channel Receiving a scheduling frame sent by the network device, the scheduling frame includes identification information of the communication device, the communication device is an Internet of Things device that has been registered in the network device; Back reflection mode sends the first data to the network device.

In a possible design, when the transceiver receives the scheduling frame sent by the network device on the wireless channel, it is specifically used to: receive on the wireless channel the network device forwarded by another IoT device Scheduling frame; when the transceiver uses the back reflection mode to send the first data to the network device on the wireless channel, it is specifically used to: use the back reflection mode to other objects on the wireless channel The networked device sends the first data, and other Internet of Things devices are used to forward the first data to the network device.

In a ninth aspect, the present application provides a communication device, including: a processor and a transceiver, and the processor and the transceiver communicate with each other through an internal connection; the transceiver is used to receive a beacon sent by a network device on a wireless channel of a wireless local area network Frame, the beacon frame includes indication information used to instruct the network device and the communication device to communicate on the wireless channel of the wireless local area network using a back reflection method to communicate; The network device performs the communication process on the wireless channel.

In a possible design, the communication process is a random access process; when the transceiver and the network device perform the communication process on the wireless channel, they are specifically used to: on the wireless channel A registration request frame is sent to the network device by using the back reflection method, and the registration request frame includes at least identification information of the communication device, and the communication device is an Internet of Things device that is not registered in the network device.

In a possible design, after the transceiver sends the registration request frame to the network device on the wireless channel by using the back reflection method, it is further used to: receive the network device on the wireless channel Sending a registration response frame; sending the second data to the network device in the back reflection mode on the wireless channel.

In a possible design, when the transceiver uses the back reflection mode to send the second data to the network device on the wireless channel, it is specifically used to: use the back reflection on the wireless channel Sending the second data to other IoT devices in a manner that is used to forward the second data to the network device.

In a tenth aspect, the present application provides a computer-readable storage medium that stores a computer program, which when run on a computer, causes the computer to perform the first aspect, the second aspect, or the third aspect The method.

In an eleventh aspect, the present application provides a computer program, which is used to execute the method described in the first aspect, the second aspect, or the third aspect when the computer program is executed by a computer.

In a possible design, the program in the eleventh aspect may be stored in whole or in part on a storage medium packaged with the processor, or in part or in whole on a memory that is not packaged with the processor.

According to a twelfth aspect, an embodiment of the present application further provides a communication system, including the communication device described in the fourth aspect, the fifth aspect, and the sixth aspect.

In a thirteenth aspect, an embodiment of the present application further provides a communication system, including the communication devices described in the seventh aspect, the eighth aspect, and the ninth aspect.

According to a fourteenth aspect, an embodiment of the present application further provides a communication device, including: an interface and a processor, the interface and the processor are coupled; the processor is used to execute the first aspect, the second aspect, or the third aspect Aspect of the method.

In a possible design, the communication device in the fourteenth aspect may be a network device, a first IoT device, or a second IoT device, or a chip; wherein, the interface may be integrated with the processor on the same chip It can also be set on different chips.

According to a fifteenth aspect, an embodiment of the present application further provides a communication device. The communication device includes: a processor, and the processor and the memory are coupled;

The memory is used to store computer programs;

The processor is configured to execute a computer program stored in the memory, so that the communication device executes the method according to the first aspect, the second aspect, or the third aspect.

According to a sixteenth aspect, an embodiment of the present application further provides a communication device, including: a processor, a memory, and a transceiver;

The memory is used to store computer programs;

In a seventeenth aspect, the present application provides a processor, the processor including: at least one circuit for performing the method according to the first aspect, the second aspect, or the third aspect.

It can be seen that in the above aspects, the network device uses the back reflection method to communicate with the IoT device on the wireless channel of the wireless local area network, which increases the communication distance between the network device and the IoT device, so that the network device and the IoT device do not need Normal communication can be carried out close to each other, thereby improving the communication efficiency of network devices and Internet of Things devices, and meeting the communication needs of the Internet of Things.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

2 is a schematic structural diagram of a transmitter of an Internet of Things device provided by this application;

3 is a schematic structural diagram of a receiver of an Internet of Things device provided by this application;

4 is a schematic structural diagram of a transmitter of another IoT device provided by this application;

5 is a diagram of a WiFi network architecture based on back reflection communication provided by an embodiment of the present application;

6 is a diagram of another WiFi network architecture based on back reflection communication provided by an embodiment of the present application;

7 is a schematic diagram of another application scenario provided by this application;

8 is a schematic diagram of yet another application scenario provided by this application;

9 is a flowchart of a communication method provided by this application;

10 is a diagram of yet another WiFi network architecture based on back reflection communication provided by this application;

11 is a schematic diagram of a communication protocol provided by this application;

12 is a schematic diagram of a frame structure provided by this application;

13 is a signaling diagram of a communication method provided by an embodiment of the present application;

14 is a signaling diagram of another communication method provided by an embodiment of this application;

15 is a signaling diagram of yet another communication method provided by an embodiment of this application;

16 is a signaling diagram of another communication method provided by an embodiment of the present application;

17 is a signaling diagram of yet another communication method provided by an embodiment of this application;

18 is a signaling diagram of another communication method provided by an embodiment of the present application;

19 is a signaling diagram of another communication method provided by an embodiment of this application;

20 is a schematic diagram of a physical frame provided by an embodiment of this application;

21 is a schematic diagram of a network architecture provided by an embodiment of this application;

22 is a schematic diagram of a channel estimation provided by an embodiment of this application;

23 is a schematic structural diagram of a communication device according to an embodiment of this application;

24 is a schematic structural diagram of a network device according to an embodiment of this application;

25 is a schematic structural diagram of another network device according to an embodiment of this application;

FIG. 26 is a schematic structural diagram of an Internet of Things device according to an embodiment of the present application.

detailed description

The terminology used in the embodiment section of the present application is only used to explain specific examples of the present application, and is not intended to limit the present application.

The embodiments of the present application can be applied to various types of communication systems. FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application. The communication system shown in FIG. 1 mainly includes a network device 11 and an Internet of Things device 12.

Among them, 1) The network device 11 may be a network-side device, for example, an access point (Access Point, AP) of a wireless local area network (Wireless Local Area Network, WLAN), an evolved base station (Evolved Node B, eNB, or eNodeB) of 4G 1. The base station for next-generation communications, such as 5G's New Radio Access Technology (NR) base station (next generation Node B, gNB) or small stations, micro stations, relay stations, transmission and reception points (Transmission and Reception Point (TRP), Roadside Unit (RSU), etc. In this embodiment, base stations in communication systems of different communication standards are different. For the sake of distinction, the base station of the 4G communication system is called Long Term Evolution (LTE) eNB, and the base station of the 5G communication system is called NRgNB. The base station that supports both the 4G communication system and the 5G communication system is called the evolved long-term Evolutionary (LongTermTerm Evolution, eLTE) eNB, these names are only for convenience of distinction, and have no limiting meaning.

2) The Internet of Things device 12 may be a network-side device or a terminal-side device, and the network-side device or the terminal-side device includes a radio frequency tag, various types of sensors, smart cards, or the like.

3) "Multiple" means two or more, and other quantifiers are similar. "And/or" describes the corresponding relationship of the related objects, indicating that there can be three relationships, for example, A and/or B, which can indicate: there are three conditions: A exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the related object is a "or" relationship.

It should be noted that the number and types of the Internet of Things devices 12 included in the communication system shown in FIG. 1 are only an example, and the embodiments of the present application are not limited thereto. For example, more IoT devices 12 that communicate with the network device 11 may also be included, which are not described in the drawings for concise description. In addition, in the communication system shown in FIG. 1, although the network device 11 and the Internet of Things device 12 are shown, the communication system may not be limited to include the network device 11 and the Internet of Things device 12, for example, may also include a terminal, Core network nodes or devices used to carry virtualized network functions are obvious to those skilled in the art and will not be repeated here.

In addition, the embodiments of the present application can be applied not only to the Internet of Things, but also to 4G wireless communication systems represented by Long-Term Evolution (LTE), vehicle-to-everything (V2X) communication systems, and devices. Device-to-device (D2D) communication system, LTE follow-up evolution, etc. Alternatively, it can also be applied to the next-generation wireless communication system, that is, the 5G communication system, and other systems that may appear in the future, such as the next-generation wifi network and 5G Internet of Vehicles. The embodiments of the present application take the Internet of Things as an example.

As shown in FIG. 1, the Internet of Things device 12 can communicate with the network device 11 or other devices through a backscattering method. Back reflection is a technology suitable for low cost and low power systems. Devices that communicate using back-reflection may not generate radio frequency (RF) signals, but send information by modulating radio frequency signals in the environment. Radio frequency signals in the environment include wireless TV signals, broadcast signals, and mobile communication stations. Signals, wireless fidelity (Wireless-FIdelity, WiFi) AP signals, dedicated card reader signals, etc.

In this embodiment, the Internet of Things device may be an active device or a passive device. When the IoT device is a passive device, the IoT device can also be powered by collecting RF signals in the environment, similar to wireless charging. FIG. 2 is a schematic structural diagram of a transmitter of an Internet of Things device that communicates through a backscatter method. As shown in FIG. 2, when there is a radio frequency signal in the surrounding environment of the Internet of Things device, the antenna of the transmitter of the Internet of Things device can receive the radio frequency signal, and the Internet of Things device can store the energy of the radio frequency signal received by the antenna in energy storage In the device, the energy storage device may specifically be a capacitor. When the energy in the energy storage device reaches a certain threshold, the IoT device can start to work. When the IoT device includes a sensor, the IoT device can drive the sensor to work.

The radio frequency signal in the surrounding environment of the Internet of Things device can not only charge the Internet of Things device, but also can send information by modulating the radio frequency signal in the surrounding environment. As a feasible implementation method, the IoT device sends information by controlling the impedance of the transmitting antenna. Taking binary on-off keying (OOK) as an example, the radio frequency signal received by the IoT device is recorded. Is x, and the signal reflected by the IoT device, that is, the signal sent by the IoT device, is recorded as y, and the relationship between x and y can be expressed by the following formula (1):

y = Γx (1)

Among them, Γ represents the reflection coefficient, Γ can be expressed as:

Among them, z _a represents the antenna impedance, z _a is usually 50 ohms.

Represents the conjugate of antenna impedance z _a . z _i represents matching impedance. As shown in FIG. 2, the IoT device can select one impedance from the impedance z ₁ and the impedance z ₂ as the matching impedance z _i through switch control, that is, the matching impedance z _i can be the impedance z ₁ and the impedance z _{One of 2} . Optionally, z ₁ is equal to

z _{2 is} not equal to

According to the above formula (1), when the matching impedance z _i is z ₁ that is

At this time, the reflection coefficients Γ=0 and y=0, indicating that the energy of the radio frequency signal x is completely absorbed by the IoT device, and the IoT device does not send a signal. At this time, the signal sent by the IoT device is considered to be “0”. When the matching impedance z _i is z ₂ , the reflection coefficients Γ≠0, y≠0, indicating that the energy of the radio frequency signal x is reflected by the IoT device, and the IoT device sends a signal. At this time, it can be considered that the IoT device sends The signal is "1". When Γ=1, it means that the IoT device does not absorb the energy of the radio frequency signal x, and the IoT device uses all the radio frequency signal x for the reflected signal.

Assuming that the signal sent by the IoT device is received by the access point AP, because there are also radio frequency signals in the surrounding environment of the access point AP, the signal received by the AP receiver includes both radio frequency signals that are not reflected by the IoT device , Including the signal reflected by the IoT device. Optionally, the AP receiver may be provided with an analog-to-digital converter (Analog-to-Digital Converter, ADC), which may convert the analog signal received by the AP receiver into a digital signal. For example, the ADC may Sampling the analog signal received by the AP receiver to obtain a discrete sampling signal, the sampling signal can be expressed as y[n], n represents the sampling sample number, and y[n] can be expressed as the following formula (2):

y[n]=x[n]+αB[n]x[n] (2)

Among them, x[n] represents the sampling signal of the RF signal in the surrounding environment, that is, the sampling signal of the original RF signal sent by the RF signal source. B[n] is specifically Γ in the above formula (1), B[n]x[n] represents the sampling signal of the signal reflected by the IoT device, and α represents the attenuation coefficient of the reflected signal relative to the original radio frequency signal.

Further, the AP may average the energy of the N sampled signals y[n] described in formula (2), and the average value of the energy of the N sampled signals y[n] may be recorded as the received power P of the AP receiver , The received power P can be expressed as the following formula (3):

When the signal reflected by the IoT device is 0, Γ=0, the received power of the AP receiver

When the signal reflected by the IoT device is 1, Γ≠0, and when Γ=1, the received power of the AP receiver

It can be seen that when the signals reflected by the IoT device are different, the received power of the AP receiver is different. The AP can demodulate the signals reflected by the IoT device according to the received power of the receiver.

Since the ADC consumes more energy, the ADC is usually set in an AP that is actively powered. When the IoT device is a passive device, the IoT device usually receives the signal sent by the AP using the method of analog circuit reception. As shown in FIG. 3, the receiver of the IoT device includes an envelope averager (Envelope) 31, a threshold calculator (Threshold Calculator) 32, a comparator (Comparator) 33 and a decoder 34. The packet averager 31 averages and smoothes the signal received by the antenna, and outputs the signal energy. The threshold calculator 32 can be used to calculate the threshold value. The comparator 33 compares the signal energy output by the packet averager 31 and the threshold value output by the threshold calculator 32, thereby determining whether the signal received by the antenna is 0 or 1.

In another possible manner, the IoT device can also use quadrature phase shift keying (QPSK) and 16 symbol quadrature amplitude modulation (QAM) methods to the surrounding environment. The RF signal is modulated, and the modulated signal is sent to the AP. 4 is a schematic structural diagram of a transmitter of an IoT device modulated by QAM. Optionally, the radio frequency signal received by the antenna is recorded as x, and the signal reflected by the antenna is the signal sent by the IoT device as y. The relationship between x and y is shown in formula (1) above, Γ represents the reflection coefficient, Γ can be Expressed as:

As shown in FIG. 4, the matching impedance z _i can have various options. Specifically, the matching impedance z _i can be one of z ₁ , z ₂ ... Z _M , that is, the matching impedance z _i can have M values. When the value of the matching impedance z _i changes, the value of Γ changes, causing the value of y to change, that is, the signal reflected by the IoT device changes.

In the existing technology, the most widely used backscatter technology is radio frequency identification (Radio Frequency Identification, RFID) technology. Radio frequency identification consists of two parts: a reader (Reader) and a tag (Tag), in which The card reader includes a receiver and a radio frequency signal source (RF Source), and the tag may specifically be an access control card, a bus card, a radio frequency tag of a commodity, a bank card swipe machine, and the like. The working principle of radio frequency identification is as follows: the tag is close to the card reader, and the energy is obtained by the radio frequency signal sent by the radio frequency signal source in the card reader. After the tag gains energy, the card reader uses the back reflection method to send an inquiry signal to the tag. The tag uses the above analog circuit receiving method to receive the query signal, and uses back reflection to feed back relevant information to the reader. The receiver of the card reader may use the analog circuit receiving method to receive the information sent by the tag, or may use the above-mentioned digital signal processing method to receive the information sent by the tag. As an alternative method, when the tag is close to the card reader, the card reader modulates the radio frequency signal sent by the radio frequency signal source to obtain a modulated signal, the modulated signal carries both the query signal of the card reader, and You can also charge the label.

It can be seen that in the radio frequency identification technology, the card reader and the tag need to be close or even when the distance between the card reader and the tag is 0, the card reader and the tag can work normally. With the Internet of Things (IOT) demand for the interconnection of everything, radio frequency identification technology may not be able to meet this demand. In order to meet the Internet of Things (IOT) requirements for the interconnection of all things, the embodiments of the present application propose a method of combining back reflection technology with a wireless local area network, such as wireless fidelity (WIreless-FIdelity, WiFi) technology. That is to say, network devices and Internet of Things devices can communicate in a wireless local area network, such as a wireless channel of WiFi, using back reflection.

In the embodiments of the present application, a WiFi system that uses a back reflection method to communicate on a wireless local area network, such as a wireless channel of WiFi, is called a back reflection WiFi (Back-Fi) system. The AP that communicates on the wireless channel of the wireless local area network, such as WiFi, using the back reflection method is referred to as a Back-Fi AP. A device that communicates on a wireless local area network, such as a wireless channel of WiFi, using a back reflection method is referred to as a Back-Fi device, and the Back-Fi device is specifically an Internet of Things device. Back-Fi APs and IoT devices work on WiFi frequency bands, for example, 2.4GHz and 5GHz bands. Back-Fi AP can seize WiFi wireless channel based on Carrier Sense Multiple Access (CSMA) principle. The working bandwidth of the Back-Fi AP is the same as that of the WiFi AP, for example, it occupies a 20MHz channel or N consecutive 20MHz channels. The working frequency of the Back-Fi device may be a fixed frequency.

5 is a diagram of a WiFi network architecture based on back reflection communication provided by an embodiment of the present application. As shown in FIG. 5, 51 represents an access point AP. In a possible situation, the access point 51 only supports back reflection to communicate with the Internet of Things devices, that is, the access point 51 is a Back-Fi AP . In another possible situation, the access point 51 supports both the WiFi communication mode and the back reflection mode, that is to say, the access point 51 is both a WiFi AP and a Back-Fi AP. Optionally, the access point 51 uses Time Division Duplexing (TDD) or Frequency Division Duplexing (FDD) to work in the WiFi mode or Back-Fi mode. The WiFi network architecture diagram shown in FIG. 5 can be applied to the scenario where the access point 51 covers a short distance, and the access point 51 can directly communicate with the Internet of Things devices within the coverage area using back reflection. Optionally, the access point 51 is provided with a radio frequency signal source, and the radio frequency signal sent by the radio frequency signal source is used to charge the Internet of Things devices within the coverage of the access point 51, and the Internet of Things device 52 is within the coverage of the access point 51 One of the multiple IoT devices, the IoT device 52 is relatively close to the access point 51, and the access point 51 and the IoT device 52 can directly communicate on the wireless channel of the WiFi network using back reflection.

FIG. 6 is another WiFi network architecture diagram based on back reflection communication provided by an embodiment of the present application. The WiFi network architecture diagram shown in FIG. 6 can be applied to the scenario where the access point 51 covers a long distance. In this scenario, the radio frequency signal source and the access point 51 may be independent devices, or the access Point 51 may include the radio frequency signal source. At this time, the communication modes between the access point 51 and the IoT devices within its coverage are divided into the following types:

One mode is: an IoT device closer to the access point 51, for example, the IoT device 61 can directly communicate with the access point 51.

Another mode is: IoT devices far away from the access point 51 require other IoT devices to relay. For example, the IoT device 62 is far away from the access point 51, and the information sent by the access point 51 to the IoT device 62 needs to be forwarded through the IoT device 63. For another example, the IoT device 64 is far away from the access point 51, and the information sent by the IoT device 64 to the access point 51 needs to be forwarded through the IoT device 65.

Another mode is: there is an RF signal source near the IoT device far away from the access point 51, for example, there is an RF signal source 67 near the IoT device 66, and the RF signal source 67 can provide the IoT device 66 with stability and power Radio frequency signal, so that the IoT device 66 can directly send information to the access point 51.

The above network architecture shown in FIG. 5 or FIG. 6 can be applied to the application scenario of the smart home shown in FIG. 7. In this application scenario, the IoT device may specifically be a passive sensor. The passive sensor interacts with the AP through back reflection. The AP is both a WiFi AP and a Back-Fi AP. When the AP and the terminals in its coverage area, For example, when a smartphone, laptop, or tablet computer that supports WiFi communication communicates, the AP is a WiFi AP. When the AP communicates with passive sensors in its coverage area using back reflection, the AP is a Back-Fi AP. When the AP is a Back-Fi AP, the passive sensor can be charged by the radio frequency signal in the surrounding environment, and interact with the AP using a back reflection method on the wireless channel of WiFi. For example, the passive sensor may be a temperature sensor, a humidity sensor, a gas alarm, a carbon monoxide alarm, etc. The passive sensor sends the data it detects to the AP on the WiFi wireless channel using back reflection. Since the passive sensor does not require battery power supply, the passive sensor can be placed in any position, and the passive sensor can be used for a long time, thereby achieving the effect of energy saving and environmental protection.

In addition, the network architecture shown in FIG. 5 or FIG. 6 can also be applied to the logistics and storage management application scenarios shown in FIG. 8. In this application scenario, the IoT device may specifically be a radio frequency tag, and each product may be provided with a radio frequency tag. The radio frequency tag can send the commodity information to the AP on the wireless channel of WiFi using a back reflection method. Or, the AP uses the back reflection method to send query information to the radio frequency tags within its coverage area in real time on the wireless channel of the WiFi. After receiving the query information, the radio frequency tags within the coverage area of the AP place the commodity information on the wireless channel of the WiFi It is sent to the AP using back reflection. Compared with the radio frequency identification technology in the prior art, when the card reader and the label need to be close, the card reader and the label can work normally, which improves the efficiency of logistics and storage management.

The embodiment of the present application proposes a communication method between a network device and an Internet of Things device based on the combination of back reflection technology and wireless local area network, such as wireless fidelity (WIreless-FIdelity, WiFi) technology. Examples of this method are introduced.

9 is a flowchart of a communication method provided by the present application. As shown in FIG. 9, the communication method described in this embodiment includes the following steps:

Step S901: The network device sends a beacon frame on the wireless channel of the wireless local area network, the beacon frame includes indication information, and the indication information is used to indicate that the network device and the Internet of Things device within the coverage of the network device are A communication process in which the wireless channel of the wireless local area network uses a back reflection method for communication.

In this embodiment, the wireless local area network may specifically be WiFi, and the network device operates in the frequency band of WiFi, such as the 2.4GHz band and the 5GHz band. Taking the 2.4GHz band as an example, the frequency range of the 2.4GHz band is 2.400GHz-2.4835GHz , A total of 83.5M bandwidth, the 83.5M bandwidth can be divided into multiple channels, each channel occupies a certain bandwidth. In this embodiment, the wireless channel of the wireless local area network may specifically be at least one of a plurality of channels after the bandwidth corresponding to the frequency band of the WiFi is divided.

The network device may specifically be an access point AP that only supports back reflection communication, that is, Back-Fi AP, or an AP that supports both WiFi communication and back reflection. As shown in FIG. 5 or FIG. 6, after preempting the wireless channel of WiFi, the access point 51 can communicate with the Internet of Things devices within the coverage of the access point 51 on the wireless channel of WiFi. As a possible implementation manner, the access point 51 may actively send radio frequency signals to the Internet of Things devices within its coverage area. For example, the access point 51 is provided with a radio frequency signal source. The IoT device uses the back reflection method to reflect the radio frequency signal actively sent by the access point 51, and sends the reflected signal to the access point 51, so as to realize communication between the access point 51 and the IoT device .

As another possible implementation, the access point 51 may actively send radio frequency signals to IoT devices within its coverage area, and the IoT device uses back reflection to actively send radio frequencies to other devices around the access point 51 The signal is reflected, and the reflected signal is sent to the access point 51 to implement communication between the access point 51 and the Internet of Things device. Other devices here may be terminals such as mobile phones and tablet computers.

As yet another possible implementation, the access point 51 uses back reflection to reflect the radio frequency signals of other devices around the access point 51, and the access point 51 sends its reflected signal to objects within its coverage Networked devices. The IoT device uses a back reflection method to reflect the radio frequency signals of other devices around the IoT device, and the IoT device sends its reflected signal to the access point 51 to realize the connection between the access point 51 and the IoT device Communication. Other devices here may be terminals such as mobile phones and tablet computers.

Specifically, when the access point 51 and the Internet of Things devices in its coverage area communicate on the WiFi wireless channel, it can be divided into different communication processes. In different communication processes, the Internet of Things devices communicating with the access point 51 It is different, and the information sent and received by the access point 51 and the IoT device are different. For example, the communication process can be divided into a scheduling access process (Schedule Access) and a random access process (Random Access). In the scheduling access process, the IoT device communicating with the access point 51 is at the access point 51 In the Internet of Things devices that have already been registered, the access point 51 may designate one or more Internet of Things devices that have been registered to report data. In the random access process, the IoT device communicating with the access point 51 is an IoT device that has not been registered in the access point 51. In order for the IoT device within the coverage of the access point 51 to determine whether the communication process with the access point 51 is a scheduled access process or a random access process, the access point 51 sends a beacon (Beacon) on the wireless channel of WiFi Frame, specifically, the access point 51 may send the beacon frame to an IoT device within its coverage area by modulating the radio frequency signal emitted by the radio frequency signal source inside the access point 51, or, the access point 51 may By reflecting the radio frequency signals emitted by other devices in the surrounding environment, the beacon frame is sent to the Internet of Things devices within its coverage by back reflection. Specifically, the access point 51 may broadcast the beacon frame within its coverage, the beacon frame includes indication information, and the indication information is used to indicate that after the access point 51 sends the beacon frame, the access point The communication process in which 51 and its Internet of Things devices use back reflection to communicate on the wireless channel of WiFi is a scheduling access process or a random access process. In some embodiments, the beacon frame may further include identification information of the access point 51, for example, the ID of the access point 51, Media Access Control Address (MAC), and so on. In other embodiments, the beacon frame may further include the duration of the scheduled access procedure or the duration of the random access procedure. For example, the indication information included in the beacon frame indicates that the communication process in which the access point 51 and the Internet of Things devices in its coverage area communicate by back reflection is a scheduling access process, and the beacon frame may further include the scheduling interface The duration of the entry process. If the indication information included in the beacon frame indicates that the communication process in which the access point 51 and the Internet of Things devices in its coverage area communicate by back reflection is a random access process, the beacon frame may further include the random access The duration of the process.

Step S902: The network device and the Internet of Things device perform the communication process on the wireless channel.

After the access point 51 broadcasts the beacon frame within its coverage area, it communicates with the IoT device within its coverage area on the wireless channel of the WiFi through the communication process indicated by the indication information. Correspondingly, after the IoT device within the coverage area of the access point 51 receives the beacon frame sent by the access point 51, according to the indication information in the beacon frame, the access point 51 and its coverage area are determined Of the Internet of Things devices use the back reflection method to perform the communication process, and perform the communication process with the access point 51 on the WiFi wireless channel.

For example, if the communication process indicated by the indication information in the beacon frame is a scheduling access process, then after sending the beacon frame, the access point 51 sends a scheduling frame to the designated IoT device, and the scheduling frame may include at least Identification information of an IoT device that has been registered in the access point 51, so that the at least one IoT device reports data to the access point 51. If the communication process indicated by the indication information in the beacon frame is a random access process, after the access point 51 sends the beacon frame, the access point 51 and the IoT device that has not registered in the coverage area perform the process Random access process. In addition, during the random access process, IoT devices that have not been registered in the access point 51 may also report emergency information, such as an alarm signal from a fire alarm sensor, to the access point 51.

In the embodiment of the present application, the Internet of Things device may be an active device or a passive device. When the IoT device is a passive device, the IoT device can be charged by radio frequency signals in the surrounding environment. As a feasible implementation method, a network device such as an access point controls the radio frequency signal source to send radio frequency signals, and the radio frequency signals Used to charge Internet of Things devices within the coverage of the access point. In other embodiments, the IoT device can also be charged in other ways, which is not limited thereto. The access point can control the RF signal source to send RF signals in the following ways:

One possible way is that the access point includes the radio frequency signal source, and the access point can directly control the radio frequency signal source to send radio frequency signals.

Another possible way is that the access point and the radio frequency signal source are independent devices, and the access point sends trigger information (Trigger) to the radio frequency signal source, and the trigger information is used to trigger the radio frequency signal source to send RF signal.

In addition, there may be both Internet of Things devices and terminals supporting WiFi communication within the coverage of the access point. The terminal may specifically be a user terminal, for example, a smart phone, a notebook computer, a tablet computer, etc. Because the access point needs to occupy the wireless channel of WiFi when communicating with the Internet of Things device, before the access point communicates with the Internet of Things device, for example, the access point uses the back reflection method on the wireless channel of WiFi Before sending the beacon frame, the access point may also use WiFi communication to send the preamble information (Legacy) to the terminal within the coverage area of the access point. The preamble information includes the access point and the IoT devices within the coverage area. The time required for the back reflection method to communicate requires the wireless channel of WiFi. As shown in FIG. 10, the coverage of the access point 51 includes not only Internet of Things devices, but also terminals, such as a smart phone 53, a notebook computer 54 and the like. Before the access point 51 communicates with the Internet of Things device, the access point 51 uses WiFi communication to send the preamble information to the terminal within the coverage of the access point 51, so that the terminal determines that the access point 51 and the Internet of Things device The time required for communication in the back reflection mode to occupy the wireless channel. During this time, the terminal does not perform WiFi communication with the access point 51.

As a possible embodiment, the access point periodically occupies the wireless channel of WiFi and uses back reflection to communicate with the Internet of Things devices within its coverage area on the wireless channel.

As shown in Figure 11, the access point communicates with the terminals in its coverage area during t1 and t3, and the access point communicates with the Internet of Things devices within its coverage area during t2 and t4, and so on . The access point communicates with the IoT devices in its coverage area periodically. Taking time period t2 as an example, the access point uses WiFi communication to send preamble information to the terminals within its coverage area to indicate that the access point needs to occupy the WiFi wireless channel for communication with the IoT devices within its coverage area. time. In addition, if the IoT device within the coverage of the access point is a passive device, and the access point and the radio frequency signal source are independent devices, the access point may also send trigger information to the radio frequency signal source, To trigger the radio frequency signal source to send radio frequency signals to charge the Internet of Things equipment. The trigger information may have the following possible implementation modes:

One possible implementation manner is that the preamble information includes the trigger information. For example, a specific field is selected in the preamble information, the specific field may be a reserved bit in the trigger information, and the specific information is set to a specific value to indicate the trigger information.

Another possible implementation manner is that the trigger information is a specific signaling independent of the preamble information.

When the radio frequency signal source detects the trigger information, it starts to send radio frequency signals. During the charging time shown in FIG. 11, the Internet of Things device charges by absorbing the energy of the radio frequency signal, and the charging time may be recorded as a MUTE period. Specifically, the access point may use WiFi communication to send trigger information to the radio frequency signal source, or may use back reflection to send trigger information to the radio frequency signal source, which is not specifically limited here. As shown in FIG. 11, the radio frequency signal source starts to send radio frequency signals from the beginning of the MUTE period. In addition to charging the Internet of Things devices during the MUTE period, the radio frequency signal can also be used for the access point and things In the process of network devices using back reflection to communicate. During the communication between the access point and the IoT device using the back reflection method, the access point sends a beacon frame to the IoT device within its coverage area. The information that the beacon frame can carry is as described above. I will not repeat them here. After the access point sends a beacon frame to the Internet of Things devices within its coverage, the access point and its Internet of Things devices communicate according to the communication process indicated by the indication information in the beacon frame, for example, Communicate through random access procedures or scheduled access procedures.

It can be understood that the communication process shown in FIG. 11 is only an example and is not limited to this. In other embodiments, if the IoT device is an active device, or if the IoT device is charged by other means, or if the access point does not include a radio frequency signal source, the access point may not send trigger information. In addition, if there is no terminal based on WiFi communication within the coverage of the access point, the access point may not send preamble information. In addition, this embodiment also does not limit the order of the random access process and the scheduling access process between the access point and the IoT device.

In this embodiment, the network device uses the back reflection method to communicate with the IoT device on the wireless channel of the wireless local area network, which increases the communication distance between the network device and the IoT device, so that the network device and the IoT device do not need to be close Normal communication, thereby improving the communication efficiency of network devices and Internet of Things devices, and meeting the communication needs of the Internet of Things.

The frame structure and specific communication process used in the random access process and the scheduled access process are described in detail below. The frame header part of the frame structure is shown in Table 1 below:

Table 1

The source address may specifically be the identification information of the transmitter, such as the MAC address of the transmitter, or other IDs of the transmitter. The destination address may specifically be the identification information of the receiver, such as the MAC address of the receiver, or other IDs of the receiver. The type field is used to define different types of frames. The type and description of each frame are shown in Table 2 below:

Table 2

FIG. 12 is a frame structure of a beacon frame, a confirmation response frame, a negative response frame, a scheduling frame, a registration request frame, a registration response frame, a registration rejection frame, a heartbeat frame, and a data frame provided by this application. The frame structure here is specifically a MAC frame structure.

As shown in FIG. 12, the frame structure of the beacon frame includes a frame header, a duration field, and a frame check sequence (Frame Check Sequence, FCS). The duration field can occupy two bytes. The duration field includes a duration, which is used to indicate the length of time that the scheduled access procedure after the beacon frame lasts or the length of time that the random access procedure lasts. The beacon frame can be divided into two types. The indication information in the first type of beacon frame is used to indicate that its follow-up is a scheduled access process, and the indication information of the second type of beacon frame is used to indicate that its subsequent is random Access process.

As shown in FIG. 12, the frame structure of the acknowledgement frame or the negative acknowledgement frame includes a frame header and a frame check sequence. The acknowledge response frame or the negative response frame is used for a response data (DATA) frame, which may be a data frame reported by the Internet of Things device to the network device. If the network device correctly receives the data frame, the network device sends an acknowledgement frame to the Internet of Things device. If the network device cannot correctly receive the data frame, the network device sends a negative response frame to the Internet of Things device.

As shown in FIG. 12, the frame structure of the scheduling frame includes a frame header and a frame check sequence. The scheduling frame is used by the network device to schedule the specified IoT device to upload information. The destination address in the frame header of the scheduling frame is the identification information of the scheduled IoT device. After receiving the scheduling frame, the scheduled Internet of Things device sends a data frame to the network device.

As shown in FIG. 12, the frame structure of the registration request frame, registration response frame, and registration rejection frame includes a frame header and a frame check sequence. The registration request frame is used for the IoT device to register with the network device. If the network device successfully receives the registration request frame, or if the network device allows the IoT device to register, it sends a registration response frame to the IoT device. If the network device does not successfully receive the registration request frame, or the network device does not allow the Internet of Things device to register, a registration rejection frame is sent to the Internet of Things device.

As shown in FIG. 12, the frame structure of the heartbeat frame includes a frame header and a frame check sequence. The heartbeat frame is used by the network device to detect whether the IoT device is working normally or is within the coverage of the network device.

As shown in FIG. 12, the frame structure of the data frame includes a frame header, a data field, and a frame check sequence. The length of the data field is determined according to the length of actual data reported by the IoT device to the network device.

In this embodiment, the length of the frame header may be 20 bytes or 160 bits. The frame check sequence may specifically be a cyclic redundancy check (Cyclic Redundancy Check, CRC) check bit with a length of 4 bytes, that is, 32 bits. In other embodiments, the length of the frame header may be greater than 20 bytes, for example, the frame header may include multiple destination addresses, a destination address has a length of 48 bits, and n destination addresses have a length of n*48 bits , N is greater than or equal to 1, the length of the frame header is (160+(n-1)*48)bit. Taking the scheduling frame as an example, the network device can schedule at least one IoT device to report information. Therefore, the frame header portion of the scheduling frame may include identification information of at least one IoT device, that is, at least one destination address.

During the scheduling access process, the network device and the Internet of Things devices within its coverage area communicate on the wireless channel of the wireless local area network, which may include the following possible situations:

A possible situation: As shown in FIG. 13, the scheduling access process of the network device and the Internet of Things device on the wireless channel includes the following steps:

Step S1301: The network device sends a scheduling frame to the first Internet of Things device on the wireless channel of the wireless local area network.

The first Internet of Things device is an Internet of Things device that has been registered in the network device, and the number of the first Internet of Things device is not limited here, and may be one or multiple. Taking an example here, the destination address in the frame header of the scheduling frame is the identification information of the first Internet of Things device.

Step S1302: The first Internet of Things device sends a data frame to the network device in a back reflection manner on the wireless channel.

For example, after receiving the scheduling frame, the first Internet of Things device sends a data frame to the network device, and the data field of the data frame includes the first data. The first data may specifically be data generated by a first Internet of Things device, for example, the first Internet of Things device is a temperature sensor, and the first data is a temperature value sensed by the temperature sensor.

In other embodiments, the network device may also schedule multiple first Internet of Things devices registered in the network device to report first data. In this case, the frame header of the scheduling frame sent by the network device includes Multiple destination addresses, each destination address is identification information of a first IoT device, and after receiving the scheduling frame, the multiple first IoT devices respectively send data frames to the network device, and the data field of the data frame Including the first data.

Another possible situation is that, as shown in FIG. 14, the scheduling access process of the network device and the Internet of Things device on the wireless channel includes the following steps:

Step S1401: The network device sends a scheduling frame to the third Internet of Things device on the wireless channel.

The third IoT device may specifically be an IoT device within the coverage of the network device, the third IoT device may be an IoT device registered in the network device, or may not be registered in the network device Internet of Things devices. In this embodiment, the network device may be far away from the first IoT device. When the network device needs to send a scheduling frame to the first IoT device, the network device may pass the third IoT device Forward the scheduling frame to the first Internet of Things device. Specifically, the source address in the frame header of the scheduling frame is the identification information of the network device, the destination address is the identification information of the first IoT device, and the relay address is the identification information of the third IoT device. The ID is 0.

Step S1402: The third Internet of Things device forwards the scheduling frame to the first Internet of Things device in a back reflection manner on the wireless channel.

After receiving the scheduling frame, the third IoT device keeps the source address, destination address, and relay address in the scheduling frame unchanged, changes the relay ID to 1, and uses the back reflection method on the wireless channel Forward the scheduling frame after modifying the relay identifier to the first Internet of Things device.

Step S1403: The first Internet of Things device sends a data frame to the third Internet of Things device in a back reflection manner on the wireless channel.

After receiving the scheduling frame forwarded by the third Internet of Things device, the first Internet of Things device sends a data frame to the third Internet of Things device in a back reflection manner on the wireless channel, and the data field of the data frame includes the first Data, the source address in the frame header of the data frame is the identification information of the first IoT device, the destination address is the identification information of the network device, and the relay address is the identification information of the third IoT device, the relay identification Set to 0.

Step S1404: The third Internet of Things device sends a confirmation response frame to the first Internet of Things device on the wireless channel using a back reflection method.

After receiving the data frame sent by the first internet of things device, the third internet of things device feeds back a confirmation response frame to the first internet of things device on the wireless channel by using a back reflection method.

Step S1405: The third Internet of Things device sends the data frame to the network device in a back reflection manner on the wireless channel.

The third IoT device keeps the source address, destination address, and relay address in the data frame unchanged, changes the relay identifier in the first data to 1, and uses the back reflection method on the wireless channel to modify the The data frame after the relay identification is forwarded to the network device.

Step S1406: The network device sends a confirmation response frame to the third IoT device on the wireless channel using a back reflection method.

After the network device successfully receives the data frame, it sends a confirmation response frame to the third IoT device on the wireless channel using back reflection.

In this embodiment, the order of step S1404 and step S1405 is not limited. In addition, the first IoT device may not be limited to one, but may be multiple. When the network device needs to schedule multiple first IoT devices to report data, the third IoT device sends the multiple IoT devices to the multiple first IoT devices respectively. The process of scheduling frames and the process of the third IoT device forwarding the data frame of each first IoT device among the plurality of first IoT devices to the network device are similar to the process shown in FIG. 14, I won't repeat them here.

Another possible situation is that, as shown in FIG. 15, the network device and Internet of Things device scheduling access process on the wireless channel includes the following steps:

Step S1501: The network device sends a heartbeat frame to the first Internet of Things device on the wireless channel using a back reflection method.

When the network device needs to detect whether a registered first IoT device is working normally, or the network device needs to detect whether a registered first IoT device is within the coverage of the network device, the network device A heartbeat frame may be sent to the first Internet of Things device on the wireless channel using a back reflection method, and the destination address of the heartbeat frame is identification information of the first Internet of Things device.

Step S1502: The first Internet of Things device sends a confirmation response frame to the network device using the back reflection method on the wireless channel.

After the first Internet of Things device successfully receives the heartbeat frame, it sends a confirmation response frame to the network device using the back reflection method on the wireless channel.

It can be understood that the network device may also detect whether multiple first IoT devices are working normally, or detect whether multiple first IoT devices are within the coverage of the network device. At this time, the heartbeat frame sent by the network device may It includes multiple destination addresses, and each destination address is identification information of a first Internet of Things device.

It should be noted that the communication processes shown in FIG. 13, FIG. 14 and FIG. 15 are only examples of the scheduling access process. During the scheduling access process, the network device and the Internet of Things devices within its coverage area are on the wireless channel of the wireless local area network. The specific communication process using back reflection communication is not limited to this.

During the random access process, the network device and the Internet of Things devices within the coverage area communicate on the wireless channel of the wireless local area network, which may include the following possible situations:

A possible situation is that, as shown in FIG. 16, the random access process performed by the network device and the Internet of Things device on the wireless channel includes the following steps:

Step S1601: The second Internet of Things device sends a registration request frame to the network device using the back reflection method on the wireless channel.

In this embodiment, the Internet of Things devices that have not been registered in the network device are recorded as the second Internet of Things devices. The number of the second Internet of Things devices is not limited here, and may be one or more. , Here is an example for a schematic description. When the second IoT device receives the beacon frame sent by the network device and determines that the network device sends the beacon frame according to the indication information in the beacon frame, the random access process is entered, and the second IoT device If it is determined that it has not been registered in the network device, the second IoT device sends a registration request frame to the network device using the back reflection method on the wireless channel, and the registration request frame includes at least identification information of the second IoT device, For example, the source address in the frame header of the registration request frame is identification information of the second IoT device, and the destination address in the frame header is identification information of the network device.

Step S1602: The network device sends a registration response frame to the second Internet of Things device on the wireless channel.

If the network device successfully receives the registration request frame of the second IoT device, or the network device allows the second IoT device to register, the network device sends the second IoT device on the wireless channel Register response frame.

In other embodiments, if the network device does not successfully receive the registration request frame of the second IoT device, or if the network device does not allow the second IoT device to register, the network device is on the wireless channel Send a registration rejection frame to the second IoT device, as shown in FIG. 17.

During the random access process, the second IoT device that has not been registered in the network device may also report data to the network device, and here, the data reported by the second IoT device to the network device is recorded as second data . For example, the second IoT device is a fire alarm sensor, and the second data reported by the second IoT device to the network device may be emergency data.

As a possible way, as shown in FIG. 18, after receiving the registration response frame sent by the network device, the second IoT device sends a data frame to the network device by using a back reflection method on the wireless channel. The data field of the data frame includes second data. If the network device successfully receives the data frame, it sends an acknowledgement frame to the second Internet of Things device. If the network device does not successfully receive the data frame, it sends a negative response frame to the second Internet of Things device.

As another possible manner, the second data reported by the second IoT device to the network device may be carried in a registration request frame sent by the second IoT device to the network device.

Another possible situation is that the data frame sent by the second IoT device to the network device can also be forwarded by the fourth IoT device. As shown in FIG. 19, the network device and the IoT device perform on the wireless channel The random access process includes the following steps:

Step S1901: The second Internet of Things device sends a data frame to the fourth Internet of Things device on the wireless channel using a back reflection method.

The fourth IoT device may specifically be an IoT device within the coverage of the network device, the fourth IoT device may be an IoT device registered in the network device, or may not be registered in the network device Internet of Things devices. In this embodiment, the network device may be far away from the second IoT device. When the second IoT device sends a data frame to the network device, the second IoT device may forward the data frame to the network device through the fourth IoT device. Specifically, the source address in the frame header of the data frame is the identification information of the second IoT device, the destination address is the identification information of the network device, and the relay address is the identification information of the fourth IoT device, relay The ID is 0.

Step S1902: The fourth Internet of Things device sends a confirmation response frame to the second Internet of Things device on the wireless channel using a back reflection method.

After the fourth IoT device successfully receives the data frame, it sends a confirmation response frame to the second IoT device on the wireless channel using back reflection.

Step S1903: The fourth Internet of Things device forwards the data frame to the network device in a back reflection manner on the wireless channel.

The fourth IoT device keeps the source address, destination address, and relay address in the data frame unchanged, changes the relay ID in the data frame to 1, and uses the back reflection method on the wireless channel to relay the modification The identified data frame is sent to the network device.

Step S1904: The network device sends a confirmation response frame to the fourth Internet of Things device on the wireless channel.

After successfully receiving the data frame, the network device sends an acknowledgement frame to the fourth IoT device on the wireless channel.

In this embodiment, the order of step S1902 and step S1903 is not limited. In addition, the second IoT device may not be limited to one, but may also be multiple. When multiple second IoT devices send data frames to the network device, the fourth IoT device sends data frames to each second IoT device. The process of forwarding is the same as the process shown in FIG. 19 and will not be repeated here.

It should be noted that the communication process shown in FIGS. 16-19 is just an example of a random access process. In the random access process, the network device and the Internet of Things devices within its coverage area use back reflection on the wireless channel of the wireless local area network. The specific communication process of the mode communication is not limited to this.

In addition, the embodiments of the present application also provide a physical frame corresponding to the above MAC frame structure. It can be understood that the MAC frame is encapsulated in a physical frame, the MAC frame is used for transmission at the data link layer, and the physical frame is used for transmission in the physical layer transmission. As shown in FIG. 20, part 200 is a MAC frame. Both the downlink physical frame and the uplink physical frame may include MAC frames. The MAC frame may be any one of FIG. 12, and the dotted line part may be one of the MAC frames. The field may not have a dotted part. For example, the beacon frame and the data frame in FIG. 12 have a field in the middle part, and other types of MAC frames have no field in the middle part. As shown in FIG. 20, the downlink physical frame includes a short training field (Short Training Field, STF) and a MAC frame. The uplink physical frame includes a short training field, a long training field (LTF) and a MAC frame. It can be seen that the uplink physical frame has one more long training field than the downlink physical frame. The long training field can be used by the network device for channel estimation. The short training field as the first field in the header of the physical frame can be used for synchronization of IoT devices. The so-called uplink refers to the direction of information transmission from the Internet of Things device to the network device, and from the RF signal source to the network device. The so-called downlink refers to the direction of information transmission from the RF signal source to the Internet of Things device and from the network device to the Internet of Things device.

As shown in Figure 21, x represents the original RF signal sent by the RF signal source, h ₁ represents the channel between the RF signal source and the network device, and h ₁ *x represents the signal received by the receiver of the network device from the RF signal source Signal, that is, h ₁ *x is a signal that has not been reflected by the IoT device. h _b represents the channel between the RF signal source and the IoT device, and h _b *x represents the signal received by the IoT device from the RF signal source. s represents the reflection coefficient, s may specifically be Γ in the above embodiment, and s*h _b *x represents the signal reflected by the Internet of Things device. h _f represents the channel between the network device and the IoT device, and h _f *s*h _b *x represents the signal received by the receiver of the network device and reflected by the IoT device. Therefore, the signal received by the receiver of the network device includes the signal emitted by the radio frequency signal source and the signal reflected by the Internet of Things device, and the signal received by the receiver of the network device is denoted as r, and r can be expressed as the following formula (4) ):

r=h ₁ *x+h _f *s*h _b *x (4)

In addition, denoting h _f *h _b as h ₂ , r can be further expressed as: r=h ₁ *x+h ₂ *s*x. Because the signal emitted by the radio frequency signal source and the signal reflected by the IoT device are overlapped, the network device cannot directly determine the signal reflected by the IoT device based on the signal r received by the receiver. For the network device, s is unknown. In addition, as described above, the IoT device can change the signal reflected by the IoT device by changing the reflection coefficient s. According to r=h ₁ *x+h ₂ *s*x, it is necessary to determine h ₁ and h ₂ before determining s.

Specifically, the LTF as described above may include two parts, one part is denoted as LTF1, and the other part is denoted as LTF2. As shown in FIG. 22, the long training field in the uplink physical frame of the radio frequency signal source includes two parts, one part is referred to as long training field 1 (LTF1), and the other part is referred to as long training field 2 (LTF2). The radio frequency signal source and the IoT device may be pre-agreed. When the radio frequency signal source sends LTF1, that is, x=LTF1, the IoT device reflects h _b *x according to the reflection coefficient s=0, at this time, the receiver of the network device The received signal is recorded as r ₁ , and r ₁ can be expressed as r ₁ =h ₁ *LTF1. In addition, the RF signal source and the IoT device may also be pre-agreed. When the RF signal source sends LTF2, that is, x=LTF2, the IoT device reflects h _b *x according to the reflection coefficient s=1, at this time, the network device The signal received by the receiver of is denoted as r ₂ , and r ₂ can be expressed as r ₂ =(h ₁ +h ₂ )*LTF2. Considering the multipath effect, LTF1 and LTF2 are orthogonal sequences. The network device can calculate h ₁ and h ₂ according to r ₁ =h ₁ *LTF1 and r ₂ =(h ₁ +h ₂ )*LTF2. In addition, in this embodiment, the original radio frequency signal x sent by the radio frequency signal source may be a predetermined known signal. According to r=h ₁ *x+h ₂ *s*x, when x, h ₁ and h ₂ are known, the network device can use the signal r received by its receiver, and x, h ₁ and h ₂ calculates s, and further determines the signal reflected by the IoT device according to s. Or, according to r=h ₁ *x+h ₂ *s*x, the network device can calculate h ₁ *x under the condition that x and h ₁ are known, according to the signal r and The calculated h ₁ *x can calculate h ₂ *s*x, further calculate s according to h ₂ *s*x, x and h ₂ , and determine the signal reflected by the Internet of Things device according to s.

It can be understood that some or all of the steps or operations in the foregoing embodiments are merely examples, and other operations or variations of various operations may be performed in the embodiments of the present application. In addition, the various steps may be performed in different orders presented in the above embodiments, and it is possible that not all operations in the above embodiments are to be performed.

It can be understood that in the above embodiments, the operations or steps implemented by the IoT device may also be implemented by components (such as chips or circuits) that can be used for the IoT device, and the operations or steps implemented by the network device may also be Implemented by components (such as chips or circuits) that can be used in network equipment.

FIG. 23 shows a schematic diagram of a communication device. The communication apparatus may be used to implement the method of the corresponding part of the network device described in the above method embodiment, or the method of the corresponding part of the Internet of Things device (for example, the first Internet of Things device and the second Internet of Things device). Instructions.

The communication device 70 may include one or more processors 71, and the processor 71 may also be referred to as a processing unit, and may implement a certain control function. The processor 71 may be a general-purpose processor or a dedicated processor.

In an optional design, the processor 71 may also store instructions 73, and the instructions may be executed by the processor, so that the communication apparatus 70 executes the network device or object described in the above method embodiment. Method of networking equipment.

In yet another possible design, the communication device 70 may include a circuit that can implement the function of sending or receiving or communicating in the foregoing method embodiments.

Optionally, the communication device 70 may include one or more memories 72 on which instructions 74 or intermediate data are stored, and the instructions 74 may be executed on the processor to cause the communication device 70 to execute The method described in the above method embodiment. Optionally, other relevant data may also be stored in the memory. Optionally, instructions and/or data may also be stored in the processor. The processor and the memory may be set separately or integrated together.

Optionally, the communication device 70 may further include a transceiver 75.

The processor 71 may be referred to as a processing unit. The transceiver 75 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., for implementing the transceiver function of the communication device.

If the communication apparatus is used to implement the operation corresponding to the network device in the above embodiment, for example, the transceiver may send a beacon frame on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information A communication process for instructing the network device to communicate with the Internet of Things device within the coverage of the network device using the back reflection method on the wireless channel of the wireless local area network; and to communicate with the Internet of Things device in the The communication process is performed on the wireless channel. The transceiver can further complete other corresponding communication functions. The processor is used to complete the corresponding determination or control operation. Optionally, the processor may also store corresponding instructions in the memory. For the specific processing method of each component, reference may be made to the related description of the foregoing embodiments.

If the communication apparatus is used to implement operations corresponding to the first IoT device, for example, the transceiver may receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, and the beacon frame includes indication information. The instruction information is used to instruct the communication process that the network device and the first Internet of Things device communicate on the wireless channel of the wireless local area network using back reflection; and the wireless channel with the network device On the communication process. The transceiver can further complete other corresponding communication functions. The processor is used to complete the corresponding determination or control operation. Optionally, the processor may also store corresponding instructions in the memory. For the specific processing method of each component, reference may be made to the related description of the foregoing embodiments.

If the communication apparatus is used to implement the operation corresponding to the second IoT device in the above embodiment, for example, the transceiver may receive the beacon frame sent by the network device on the wireless channel of the wireless local area network, the beacon frame Including instruction information for instructing the network device to communicate with the second Internet of Things device on the wireless channel of the wireless local area network using back reflection; and to communicate with the network device The communication process is performed on the wireless channel. Optionally, the transceiver can also be used to complete other related communication operations, and the processor can also be used to complete other corresponding determination or control operations. Optionally, corresponding instructions can also be stored in the memory. For the specific processing method of each component, reference may be made to the related description of the foregoing embodiments.

The processors and transceivers described in this application can be implemented in integrated circuits (IC), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (application specific integrated circuits (ASIC)), and printed circuit boards ( printed circuit board (PCB), electronic equipment, etc. The processor and transceiver can also be manufactured using various 1C process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type Metal oxide semiconductor (positive channel, metal oxide semiconductor, PMOS), bipolar junction transistor (Bipolar Junction Transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

Alternatively, the communication device may be an independent device or may be part of a larger device. For example, the device may be:

(1) Independent integrated circuit IC, or chip, or, chip system or subsystem;

(2) A set of one or more ICs, optionally, the set of ICs may also include storage components for storing data and/or instructions;

(3) ASIC, such as modem (MSM);

(4) Modules that can be embedded in other devices;

(5) Receivers, terminals, cellular phones, wireless devices, handsets, mobile units, network equipment, etc.;

(6) Others and so on.

24 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in FIG. 24, the communication device 240 includes: a transceiver module 241; wherein, the transceiver module 241 is used to send a beacon frame on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used to A communication process instructing the communication device to communicate with the Internet of Things devices within the coverage of the communication device on the wireless channel of the wireless local area network using back reflection; and to communicate with the Internet of Things device on the wireless channel On the communication process.

In FIG. 24, further, the communication device 240 may further include: a control module 242 for the transceiver module to control the radio frequency signal source to send radio frequency signals before sending beacon frames on the wireless channel of the wireless local area network, the radio frequency signals It is used to charge the Internet of Things device.

In a possible manner, the transceiver module 241 may also be used to: before sending a beacon frame on the wireless channel of the wireless local area network, use wireless local area network communication to send the preamble information to the terminal within the coverage of the communication device, the preamble The information includes the time required for the communication device and the Internet of Things device to occupy the wireless channel by using the back reflection method for communication.

In another possible manner, the communication process is a scheduling access process; when the transceiver module 241 and the Internet of Things device perform the communication process on the wireless channel, they are specifically used to: on the wireless channel Sending a scheduling frame to at least one first Internet of Things device, the scheduling frame including identification information of the at least one first Internet of Things device, the first Internet of Things device is an Internet of Things device that has been registered in the communication device Receiving on the wireless channel the first data sent by the at least one first Internet of Things device using the back reflection method.

Optionally, when the transceiver module 241 sends a scheduling frame to at least one first IoT device on the wireless channel, it is specifically used to: send the scheduling frame to other IoT devices on the wireless channel, the other The Internet of Things device is used to forward the scheduling frame to the at least one first Internet of Things device; the transceiver module 241 receives on the wireless channel the second at least one first Internet of Things device sent by the back reflection method. A piece of data is specifically used to: receive, on the wireless channel, the first data forwarded by the other IoT device and reported by the at least one first IoT device using the back reflection method.

Optionally, the communication process is a random access process; when the transceiver module 241 and the Internet of Things device perform the communication process on the wireless channel, they are specifically configured to: receive at least one first Two Internet of Things devices use a registration request frame sent by the back reflection method, the registration request frame includes at least identification information of the second Internet of Things device, and the second Internet of Things device is not registered in the communication device IoT device.

Optionally, after receiving and sending the registration request frame sent by at least one second Internet of Things device on the wireless channel, the transceiver module 241 is further used to send registration to the at least one second Internet of Things device on the wireless channel. A response frame; receiving on the wireless channel the second data sent by the at least one second Internet of Things device using the back reflection method.

Optionally, when the transceiver module 241 receives the second data sent by the at least one second IoT device using the back reflection method on the wireless channel, it is specifically used to: receive other IoT on the wireless channel The second data reported by the at least one second IoT device and forwarded by the device in the back reflection manner.

Optionally, the registration request frame further includes second data reported by the second IoT device to the communication device.

Optionally, the communication device includes the radio frequency signal source.

Optionally, when the control module 242 controls the radio frequency signal source to send radio frequency signals, it is specifically used to control the transceiver module 241 to send trigger information to the radio frequency signal source, and the trigger information is used to trigger the radio frequency signal source to send Describe the RF signal.

Optionally, the preamble information includes the trigger information.

The communication device of the embodiment shown in FIG. 24 may be used to execute the technical solutions of the above method embodiments. For the implementation principles and technical effects, reference may be made to the related description in the method embodiments. Optionally, the communication device may be a network device, or It can be a component of a network device (such as a chip or a circuit).

An embodiment of the present application provides a communication device. The communication apparatus includes: a transceiver module; wherein the transceiver module is configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used to indicate the network device A communication process for communicating with the communication device on the wireless channel of the wireless local area network using back reflection; and performing a communication process with the network device on the wireless channel.

Further, before receiving the beacon frame sent by the network device on the wireless channel of the wireless local area network, the transceiving module is further used to receive the radio frequency signal sent by the radio frequency signal source, and the radio frequency signal is used to charge the communication device.

In a possible manner, the communication process is a scheduling access process; when the transceiver module and the network device perform the communication process on the wireless channel, they are specifically used to: receive on the wireless channel A scheduling frame sent by the network device, the scheduling frame including identification information of the communication device, the communication device is an Internet of Things device that has been registered in the network device; the back channel is adopted on the wireless channel Reflect to send the first data to the network device.

The communication device of this embodiment may be used to execute the technical solutions of the foregoing method embodiments. For the implementation principles and technical effects, reference may be made to the related description in the method embodiments. Optionally, the communication apparatus may be the first physical network device, or may be a component (such as a chip or a circuit) of the first physical network device.

An embodiment of the present application provides another communication device. The communication apparatus includes a transceiver module for receiving a beacon frame sent by a network device on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used to instruct the network device to communicate with the The device uses a back reflection method to perform a communication process on the wireless channel of the wireless local area network; and performs the communication process on the wireless channel with the network device.

Further, before the transceiver module receives the beacon frame sent by the network device on the wireless channel of the wireless local area network, it is further used to: receive the radio frequency signal sent by the radio frequency signal source, and the radio frequency signal is used to charge the communication device.

In a possible manner, the communication process is a random access process; when the transceiver module and the network device perform the communication process on the wireless channel, they are specifically used to: adopt the wireless channel The back reflection mode sends a registration request frame to the network device, where the registration request frame includes at least identification information of the communication device, and the communication device is an Internet of Things device that is not registered in the network device.

Optionally, after the transceiver module sends the registration request frame to the network device on the wireless channel by using the back reflection method, it is further used to: receive the registration response sent by the network device on the wireless channel Frame; send the second data to the network device in the back reflection mode on the wireless channel.

In another possible manner, the registration request frame further includes second data reported by the communication apparatus to the network device.

The communication device of this embodiment may be used to execute the technical solutions of the above method embodiments. For the implementation principles and technical effects, reference may be made to the related description in the method embodiments. Optionally, the communication device may be a second Internet of Things device, or It may be a component (eg, chip or circuit) of the second IoT device.

It should be understood that the division of each module of the above communication device is only a division of logical functions, and in actual implementation, it may be fully or partially integrated into one physical entity or may be physically separated. And these modules can all be implemented in the form of software calling through processing elements; they can also be implemented in the form of hardware; some modules can also be implemented in the form of software calling through processing elements, and some modules can be implemented in hardware. For example, the control module may be a separately established processing element, or may be integrated in a communication device, such as a chip of a network device, and may also be stored in the memory of the communication device in the form of a program. A processing element calls and executes the functions of the above modules. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together or can be implemented independently. The processing element described here may be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in a processor element or instructions in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above method, for example, one or more specific integrated circuits (Application Specific Integrated Circuit, ASIC), or one or more microprocessors (digital singnal processor (DSP), or, one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), etc. As another example, when a certain module above is implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call a program. As another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

FIG. 25 is a schematic structural diagram of another communication device according to an embodiment of the present application. The communication device may specifically be a base station. As shown in FIG. 25, the base station includes an antenna 251, a radio frequency device 252, and a baseband device 253. The antenna 251 is connected to the radio frequency device 252. In the upstream direction, the radio frequency device 252 receives the information sent by the IoT device through the antenna 251, and sends the information sent by the IoT device to the baseband device 253 for processing. In the downstream direction, the baseband device 253 processes the information of the IoT device and sends it to the radio frequency device 252, and the radio frequency device 252 processes the information of the IoT device and sends it to the IoT device through the antenna 251.

The above communication device may be located in the baseband device 253. In an implementation, each of the above modules is implemented in the form of a processing element scheduling program. For example, the baseband device 253 includes a processing element and a storage element. The processing element 2531 calls the program stored in the storage element 2532 to Perform the method in the above method embodiment. In addition, the baseband device 253 may further include an interface 2533 for exchanging information with the radio frequency device 252. The interface is, for example, a common public radio interface (common public radio interface, CPRI).

In another implementation, the above modules may be one or more processing elements configured to implement the above method, and these processing elements are disposed on the baseband device 253, where the processing elements may be integrated circuits, for example: one or more An ASIC, or, one or more DSPs, or, one or more FPGAs, etc. These integrated circuits can be integrated together to form a chip.

For example, the above modules may be integrated together and implemented in the form of a system-on-a-chip (SOC). For example, the baseband device 253 includes an SOC chip for implementing the above method. The chip may integrate a processing element 2531 and a storage element 2532, and the processing element 2531 may call the stored program of the storage element 2532 to implement the above method or the functions of the above modules; or, at least one integrated circuit may be integrated in the chip. In order to realize the above method or the functions of the above modules; or, the above implementation modes can be combined, some of the functions of the modules are realized by processing elements calling programs, and some of the functions of the modules are realized by integrated circuits.

In any case, in summary, the above communication device includes at least one processing element, a storage element, and a communication interface, where at least one processing element is used to execute the method provided by the above method embodiments. The processing element can perform part or all of the steps in the above method embodiments in the first way: that is, execute the program stored by the storage element; or in the second way: that is, through the integrated logic circuit of the hardware in the processing element The method of instructions executes some or all of the steps in the above method embodiments; of course, the methods provided in the above method embodiments may also be executed in combination with the first method and the second method.

The processing element here is the same as described above, it can be a general-purpose processor, such as a Central Processing Unit (CPU), or one or more integrated circuits configured to implement the above method, for example: one or more specific Integrated circuit (Application Specific Integrated Circuit, ASIC), or, one or more microprocessors (digital microprocessors, DSP), or, one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), etc. The storage element may be a memory or a collective term for multiple storage elements.

26 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in FIG. 26, the communication device 260 includes a processor 262 and a transceiver device 263. The transceiver device 263 is configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network. The beacon frame includes indication information. The indication information is used to instruct the communication process between the network device and the communication device to perform a back reflection on the wireless channel of the wireless local area network; to perform the communication with the network device on the wireless channel Communication process. Further, it also includes a memory 261 for storing computer programs or instructions, and a processor 262 for calling the programs or instructions.

The communication device of the embodiment shown in FIG. 26 may be used to execute the technical solutions of the foregoing method embodiments. For the implementation principles and technical effects, reference may be made to the related description in the method embodiments. It is not repeated here. The communication device may be a physical network device or a component (such as a chip or a circuit) of the physical network device.

In FIG. 26, the transceiver 263 can be connected to an antenna. In the downlink direction, the transceiver 263 receives the information sent by the base station through the antenna, and sends the information to the processor 262 for processing. In the upstream direction, the processor 262 processes the data of the Internet of Things device and sends it to the base station through the transceiver 263.

Optionally, the transceiver device 263 may be used to implement the corresponding function in the transceiver module of the Internet of Things device described in the foregoing embodiment. Alternatively, part or all of the above modules may also be implemented in a chip of the Internet of Things device in the form of an integrated circuit. And they can be implemented separately or integrated together. That is, the above modules can be configured as one or more integrated circuits that implement the above method, for example: one or more specific integrated circuits (Application Specific Integrated Circuit, ASIC), or, one or more microprocessors (digital microprocessors) , DSP), or, one or more field programmable gate arrays (Field Programmable Gate Array, FPGA), etc.

Embodiments of the present application also provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program that, when run on a computer, causes the computer to execute the communication method described in the foregoing embodiments.

In addition, embodiments of the present application also provide a computer program product, which includes a computer program, which, when run on a computer, causes the computer to execute the communication method described in the foregoing embodiment.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the present application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk).

Claims

A communication method, characterized in that it includes:

The network device sends a beacon frame on the wireless channel of the wireless local area network, and the beacon frame includes indication information used to indicate that the network device and the Internet of Things devices within the coverage of the network device are in the wireless The communication process of performing communication on the wireless channel of the local area network using back reflection;

The network device and the Internet of Things device perform the communication process on the wireless channel.
The method according to claim 1, wherein before the network device sends a beacon frame on a wireless channel of a wireless local area network, the method further comprises:

The network device controls a radio frequency signal source to send a radio frequency signal, and the radio frequency signal is used to charge the Internet of Things device.
The method according to claim 1, wherein before the network device sends a beacon frame on a wireless channel of a wireless local area network, the method further comprises:

The network device uses wireless local area network communication to send preamble information to terminals within the coverage of the network device, where the preamble information includes the occupation required for the network device and the Internet of Things device to communicate using the back reflection method State the time of the wireless channel.
The method according to any one of claims 1-3, wherein the communication process is a scheduling access process;

The communication process between the network device and the Internet of Things device on the wireless channel includes:

The network device sends a scheduling frame on the wireless channel to at least one first IoT device, the scheduling frame includes identification information of the at least one first IoT device, the first IoT device is already on Internet of Things devices registered in the network device;

The network device receives on the wireless channel the first data sent by the at least one first Internet of Things device using the back reflection method.
The method according to any one of claims 1-3, wherein the communication process is a random access process;

The communication process between the network device and the Internet of Things device on the wireless channel includes:

The network device receives on the wireless channel at least one registration request frame sent by the second IoT device using the back reflection method, the registration request frame includes at least identification information of the second IoT device, the The second IoT device is an IoT device that is not registered in the network device.
The method according to claim 5, wherein after the network device receives a registration request frame sent by at least one second Internet of Things device on the wireless channel, the method further comprises:

The network device sends a registration response frame to the at least one second Internet of Things device on the wireless channel;

The network device receives, on the wireless channel, second data sent by the at least one second Internet of Things device using the back reflection method.
The method according to claim 5, wherein the registration request frame further includes second data reported by the second IoT device to the network device.
The method according to any one of claims 2-7, wherein the network device includes a radio frequency signal source.
The method according to any one of claims 2-7, wherein the network device controlling the radio frequency signal source to send radio frequency signals includes:

The network device sends trigger information to the radio frequency signal source, and the trigger information is used to trigger the radio frequency signal source to send the radio frequency signal.
A communication method, characterized in that it includes:

The first IoT device receives a beacon frame sent by a network device on a wireless channel of a wireless local area network, the beacon frame includes indication information, and the indication information is used to indicate that the network device and the first IoT device are in A communication process of performing a communication on the wireless channel of the wireless local area network using back reflection;

The first Internet of Things device and the network device perform the communication process on the wireless channel.
The method according to claim 10, wherein before the first IoT device receives the beacon frame sent by the network device on the wireless channel of the wireless local area network, the method further comprises:

The first IoT device receives a radio frequency signal sent by a radio frequency signal source, and the radio frequency signal is used to charge the first IoT device.
The method according to claim 10 or 11, wherein the communication process is a scheduling access process;

The communication process between the first Internet of Things device and the network device on the wireless channel includes:

The first IoT device receives a scheduling frame sent by the network device on the wireless channel, the scheduling frame includes identification information of the first IoT device, the first IoT device is already in Describe the Internet of Things device registered in the network device;

The first Internet of Things device sends the first data to the network device in the back reflection mode on the wireless channel.
A communication method, characterized in that it includes:

The second IoT device receives a beacon frame sent by the network device on a wireless channel of the wireless local area network, the beacon frame includes indication information, and the indication information is used to indicate that the network device and the second IoT device are in A communication process of performing a communication on the wireless channel of the wireless local area network using back reflection;

The second Internet of Things device and the network device perform the communication process on the wireless channel.
The method according to claim 13, wherein before the second IoT device receives the beacon frame sent by the network device on the wireless channel of the wireless local area network, the method further comprises:

The second IoT device receives a radio frequency signal sent by a radio frequency signal source, and the radio frequency signal is used to charge the second IoT device.
The method according to claim 13 or 14, wherein the communication process is a random access process;

The communication process between the second Internet of Things device and the network device on the wireless channel includes:

The second IoT device sends the registration request frame to the network device on the wireless channel using the back reflection method, the registration request frame includes at least identification information of the second IoT device, the first 2. The Internet of Things device is an Internet of Things device not registered in the network device.
The method according to claim 15, wherein after the second IoT device sends the registration request frame to the network device on the wireless channel using the back reflection method, the method further comprises:

The second Internet of Things device receives a registration response frame sent by the network device on the wireless channel;

The second Internet of Things device transmits the second data to the network device in the back reflection mode on the wireless channel.
The method according to claim 15, wherein the registration request frame further includes second data reported by the second IoT device to the network device.
A communication device, characterized in that it includes a unit for performing any of the methods of rights 1-17.
A communication device, characterized in that it includes a processor and a transceiver, and the processor and the transceiver communicate with each other through an internal connection; the processor is used to perform the processing steps in any one of the methods of rights 1-16, and the transceiver is used In the method of any one of the execution rights 1-17, the sending and receiving steps.
A computer-readable storage medium, characterized in that it is used to store a computer program, and the computer program includes instructions for performing any one of the methods of rights 1-17.
A computer program, characterized in that the computer program includes instructions for any of the methods of rights 1-17.
A communication device, comprising: an interface and a processor, the interface and the processor are coupled;

The processor is used to execute the method of any one of claims 1-9, 10-12, or 13-17.
A communication device, comprising: a processor, the processor and a memory are coupled;

The memory is used to store computer programs;

The processor is configured to execute a computer program stored in the memory, so that the communication device executes the method according to any one of claims 1-9, 10-12, or 13-17.
A communication device, characterized by comprising: a processor, a memory and a transceiver;

The memory is used to store computer programs;

The processor is configured to execute a computer program stored in the memory, so that the communication device executes the method according to any one of claims 1-9, 10-12, or 13-17.
A processor, characterized in that the processor comprises: at least one circuit for performing the method according to any one of claims 1-9, 10-12 or 13-17.
A system characterized in that the system includes the network device according to any one of claims 1-9, the Internet of Things device according to any one of claims 10-12, and any one of claims 13-17 The Internet of Things device.