CN111328127A

CN111328127A - Communication method, communication device, and storage medium

Info

Publication number: CN111328127A
Application number: CN201811532780.9A
Authority: CN
Inventors: 吴涛; 贾嘉; 王倩
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2020-06-23
Anticipated expiration: 2038-12-14
Also published as: WO2020119724A1; CN111328127B

Abstract

An embodiment of the present application provides a communication method, a communication apparatus, and a storage medium, where the method includes: the method comprises the steps that a network device sends a beacon frame on a wireless channel of a wireless local area network, wherein the beacon frame comprises indication information, and the indication information is used for indicating a communication process that the network device and an Internet of things device within the coverage range of the network device communicate on the wireless channel of the wireless local area network in a back reflection mode; the network device and the Internet of things device perform the communication process on the wireless channel. The network equipment is communicated with the Internet of things equipment in a back reflection mode on a wireless channel of a wireless local area network, so that the communication distance between the network equipment and the Internet of things equipment is increased, the network equipment and the Internet of things equipment can normally communicate without being close to each other, the communication efficiency of the network equipment and the Internet of things equipment is improved, and the communication requirement of the Internet of things is met.

Description

Communication method, communication device, and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method, a communication apparatus, and a storage medium.

Background

The Modulated backscattering is a low-cost, low-power consumption wireless communication method. Devices that communicate via back-reflection transmit information by modulating radio frequency signals in the environment, including wireless television signals, broadcast signals, signals transmitted by mobile communication stations, signals transmitted by WiFi APs (routers), signals transmitted by dedicated card readers, and the like.

Among the prior art, the most widely used application of the back reflection technology is the Radio Frequency Identification (RFID) technology. In the RFID technology, two communication parties include a card reader and a tag, where the card reader includes a receiver and a Radio Frequency (RF) signal source, and the tag needs to approach the card reader and obtain energy through an RF signal transmitted by the RF signal source. After the tag obtains energy, the tag and the reader communicate by way of back reflection.

However, with the continuous development of the Internet of things (IOT), the Internet of things (IOT) needs to be interconnected, and the radio frequency identification technology needs a card reader and a tag to be close to each other to work, so the radio frequency identification technology cannot meet the communication requirement of the Internet of things.

Disclosure of Invention

The application provides a communication method, a communication device and a storage medium, which are used for improving the communication efficiency of network equipment and Internet of things equipment and meeting the communication requirement of the Internet of things.

In a first aspect, the present application provides a communication method, including: the method comprises the steps that a network device sends a beacon frame on a wireless channel of a wireless local area network, the beacon frame comprises indication information, the indication information is used for indicating a communication process that the network device and an internet of things device within the coverage range of the network device communicate on the wireless channel of the wireless local area network in a back reflection mode, and further the network device and the internet of things device communicate on the wireless channel. According to the scheme provided by the embodiment, the communication distance between the network equipment and the Internet of things equipment is increased, so that the network equipment and the Internet of things equipment can normally communicate without being close to each other, the communication efficiency of the network equipment and the Internet of things equipment is improved, and the communication requirement of the Internet of things is met.

In one possible design, before the network device transmits a beacon frame on a wireless channel of a wireless local area network, the method further includes: the network equipment controls the radio frequency signal source to send radio frequency signals, and the radio frequency signals are used for charging the Internet of things equipment. Through the scheme that this embodiment provided, can avoid thing networking equipment because the electric quantity is not enough and unable normal work for this thing networking equipment does not need battery powered also can charge, has saved the electric power resource.

In one possible design, before the network device transmits a beacon frame on a wireless channel of a wireless local area network, the method further includes: the network equipment adopts a wireless local area network communication mode to send leading information to a terminal in a coverage area of the network equipment, and the leading information comprises time required for occupying a wireless channel when the network equipment and the Internet of things equipment adopt a back reflection mode to communicate. Through the scheme provided by the embodiment, the terminal in the coverage range of the network equipment can be prompted, the network equipment and the Internet of things equipment adopt the back reflection mode to communicate for occupying the time of the wireless channel, and the network resource consumption caused by the fact that the terminal sends information to the network equipment within the time and the network equipment cannot normally communicate with the terminal is avoided.

In one possible design, the communication procedure is a scheduled access procedure; the network device and the internet of things device perform the communication process on the wireless channel, and the communication process includes: the network device sends a scheduling frame to at least one first internet of things device on the wireless channel, wherein the scheduling frame comprises identification information of the at least one first internet of things device, and the first internet of things device is an internet of things device which is registered in the network device; and the network equipment receives first data sent by the at least one first Internet of things equipment in the back reflection mode on the wireless channel. By the scheme provided by the embodiment, the network equipment can appoint the Internet of things equipment to report data, and scheduling management of the network equipment on the Internet of things equipment is realized.

In one possible design, the network device transmitting a schedule frame to at least one first internet of things device over the wireless channel, comprising: the network device sends the scheduling frame to other internet of things devices on the wireless channel, and the other internet of things devices are used for forwarding the scheduling frame to the at least one first internet of things device; the network device receiving, on the wireless channel, first data sent by the at least one first internet of things device in the back reflection manner, includes: and the network equipment receives the first data which is transmitted by the other Internet of things equipment and reported by the at least one first Internet of things equipment in the back reflection mode on the wireless channel. Through the scheme provided by the embodiment, the network equipment far away from the first internet of things equipment can normally communicate, and the reliability of communication is ensured.

In one possible design, the communication procedure is a random access procedure; the network device and the internet of things device perform the communication process on the wireless channel, and the communication process includes: the network device receives a registration request frame sent by at least one second networking device in the back reflection mode on the wireless channel, wherein the registration request frame at least comprises identification information of the second networking device, and the second networking device is an Internet of things device which is not registered in the network device.

In one possible design, after the network device receives a registration request frame sent by at least one second networked device over the wireless channel, the method further includes: the network device transmitting a registration response frame to the at least one second networked device over the wireless channel; and the network equipment receives second data sent by the at least one second networking equipment in the back reflection mode on the wireless channel.

In one possible design, the network device receives, over the wireless channel, second data sent by the at least one second networking device in the back reflection mode, and the method includes: and the network equipment receives second data which are forwarded by other Internet of things equipment in a back reflection mode and reported by the at least one second Internet of things equipment on the wireless channel.

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

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

In one possible design, the network device controls the rf signal source to transmit the rf signal, and includes: and the network equipment sends triggering information to the radio frequency signal source, wherein the triggering information is used for triggering the radio frequency signal source to send the radio frequency signal.

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

In a second aspect, the present application provides a method of communication, the method comprising: the method comprises the steps that a first Internet of things device receives a beacon frame sent by a network device on a wireless channel of a wireless local area network, wherein the beacon frame comprises indication information, and the indication information is used for indicating a communication process that the network device and the first Internet of things device communicate on the wireless channel of the wireless local area network in a back reflection mode; the first internet of things device and the network device perform the communication process on the wireless channel.

In one possible design, before the first internet of things device receives a beacon frame sent by a network device on a wireless channel of a wireless local area network, the method further includes: the first Internet of things equipment receives a radio frequency signal sent by a radio frequency signal source, and the radio frequency signal is used for charging the first Internet of things equipment.

In one possible design, the communication procedure is a scheduled access procedure; the first internet of things device and the network device perform the communication process on the wireless channel, including: the first internet of things device receives a scheduling frame sent by the network device on the wireless channel, wherein the scheduling frame comprises identification information of the first internet of things device, and the first internet of things device is an internet of things device which is registered in the network device; and the first Internet of things equipment sends first data to the network equipment on the wireless channel in the back reflection mode.

In one possible design, the receiving, by the first internet of things device, the schedule frame sent by the network device on the wireless channel includes: the first Internet of things device receives scheduling frames of the network device forwarded by other Internet of things devices on the wireless channel; the first internet of things device sends first data to the network device in the wireless channel in the back reflection mode, and the method includes: the first Internet of things equipment is used for sending the first data to other Internet of things equipment in a back reflection mode on the wireless channel, and the other Internet of things equipment is used for forwarding the first data to the network equipment.

In a third aspect, the present application provides a communication method, including: the second networking equipment receives a beacon frame sent by the network equipment on a wireless channel of a wireless local area network, wherein the beacon frame comprises indication information, and the indication information is used for indicating a communication process that the network equipment and the second networking equipment communicate in a back reflection mode on the wireless channel of the wireless local area network; the second networking device and the network device conduct the communication process on the wireless channel.

In one possible design, before the second networked device receives a beacon frame transmitted by a network device on a wireless channel of a wireless local area network, the method further includes: and the second networking equipment receives a radio frequency signal sent by a radio frequency signal source, and the radio frequency signal is used for charging the second networking equipment.

In one possible design, the communication procedure is a random access procedure; the second networking device and the network device perform the communication process on the wireless channel, and the communication process comprises the following steps: the second networking equipment sends a registration request frame to the network equipment in the wireless channel in the back reflection mode, wherein the registration request frame at least comprises identification information of the second networking equipment, and the second networking equipment is the networking equipment which is not registered in the network equipment.

In one possible design, after the second network-connected device sends a registration request frame to the network device in the back reflection manner over the wireless channel, the method further includes: the second networking equipment receives a registration response frame sent by the networking equipment on the wireless channel; and the second networking equipment transmits second data to the networking equipment on the wireless channel in the back reflection mode.

In one possible design, the second network device sending second data to the network device in the back reflection manner over the wireless channel, including: the second internet of things device sends the second data to other internet of things devices in the wireless channel in the back reflection mode, and the other internet of things devices are used for forwarding the second data to the network devices.

In a fourth aspect, the present application provides a communication apparatus comprising: the communication device comprises a transceiving module and a processing module, wherein the transceiving module is used for sending a beacon frame on a wireless channel of a wireless local area network, the beacon frame comprises indication information, and the indication information is used for indicating the communication device and the communication process of the Internet of things equipment in the coverage range of the communication device to communicate on the wireless channel of the wireless local area network in a back reflection mode; and performing the communication process with the internet of things device on the wireless channel.

In one possible design, the communications apparatus further includes: the control module is used for controlling a radio frequency signal source to send a radio frequency signal before the transceiver module sends a beacon frame on a wireless channel of a wireless local area network, and the radio frequency signal is used for charging the Internet of things equipment.

In one possible design, the transceiver module is further configured to: before sending a beacon frame on a wireless channel of a wireless local area network, sending preamble information to a terminal in a coverage area of the communication device in a wireless local area network communication mode, wherein the preamble information comprises time required for the communication device and the Internet of things equipment to occupy the wireless channel when the communication device and the Internet of things equipment communicate in a back reflection mode.

In one possible design, the communication procedure is a scheduled access procedure; the transceiver module and the internet of things device are specifically configured to, during the communication process on the wireless channel: transmitting a schedule frame to at least one first internet of things device on the wireless channel, the schedule frame including identification information of the at least one first internet of things device, the first internet of things device being an internet of things device that has been registered in the communication apparatus; and receiving first data sent by the at least one first internet of things device in the back reflection mode on the wireless channel.

In one possible design, when the transceiver module sends a schedule frame to at least one first internet of things device on the wireless channel, the transceiver module is specifically configured to: the scheduling frame is sent to other internet of things devices on the wireless channel, and the other internet of things devices are used for forwarding the scheduling frame to the at least one first internet of things device; when the transceiver module receives the first data sent by the at least one first internet of things device in the back reflection mode on the wireless channel, the transceiver module is specifically configured to: and receiving first data which are transmitted by the other Internet of things equipment and reported by the at least one first Internet of things equipment in the back reflection mode on the wireless channel.

In one possible design, the communication procedure is a random access procedure; the transceiver module and the internet of things device are specifically configured to, during the communication process on the wireless channel: receiving a registration request frame sent by at least one second networking device in the back reflection mode on the wireless channel, wherein the registration request frame at least comprises identification information of the second networking device, and the second networking device is an internet of things device which is not registered in the communication device.

In one possible design, after the transceiver module receives a registration request frame sent by at least one second networked device over the wireless channel, the transceiver module is further configured to: transmitting a registration response frame to the at least one second networked device over the wireless channel; and receiving second data sent by the at least one second networking device in the back reflection mode 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 networking device in the back reflection manner, the transceiver module is specifically configured to: and receiving second data which are transmitted by other Internet of things equipment in a back reflection mode and reported by the at least one second Internet of things equipment on the wireless channel.

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

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

In a possible design, when the control module controls the rf signal source to transmit the rf signal, the control module is specifically configured to: and controlling the transceiver module to send trigger information to the radio frequency signal source, wherein the trigger information is used for triggering the radio frequency signal source to send the radio frequency signal.

In a fifth aspect, the present application provides a communication device, comprising: a transceiver module, configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and the communication apparatus communicate in a back reflection manner on the wireless channel of the wireless local area network; performing the communication procedure with the network device over the wireless channel.

In one possible design, before receiving the beacon frame transmitted by the network device on the wireless channel of the wireless local area network, the transceiver module is further configured to: and receiving a radio frequency signal sent by a radio frequency signal source, wherein the radio frequency signal is used for charging the communication device.

In one possible design, the communication procedure is a scheduled access procedure; when the transceiver module and the network device perform the communication process on the wireless channel, the transceiver module is specifically configured to: receiving a schedule frame transmitted by the network device on the wireless channel, the schedule frame including identification information of the communication apparatus, the communication apparatus being an internet of things device that has been registered in the network device; and sending first data to the network equipment on the wireless channel in the back reflection mode.

In a possible design, when the transceiver module receives a scheduling frame sent by the network device on the wireless channel, the transceiver module is specifically configured to: receiving scheduling frames of the network equipment forwarded by other Internet of things equipment on the wireless channel; when the transceiver module sends the first data to the network device in the wireless channel in the back reflection manner, the transceiver module is specifically configured to: and sending the first data to other Internet of things equipment by adopting the back reflection mode on the wireless channel, wherein the other Internet of things equipment is used for forwarding the first data to the network equipment.

In a sixth aspect, the present application provides a communication apparatus comprising: a transceiver module, configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and the communication apparatus communicate in a back reflection manner on the wireless channel of the wireless local area network; performing the communication procedure with the network device over the wireless channel.

In one possible design, the communication procedure is a random access procedure; when the transceiver module and the network device perform the communication process on the wireless channel, the transceiver module is specifically configured to: and sending a registration request frame to the network equipment by adopting the back reflection mode on the wireless channel, wherein the registration request frame at least comprises the identification information of the communication device, and the communication device is the equipment of the internet of things which is not registered in the network equipment.

In one possible design, after the transceiver module sends a registration request frame to the network device in the back reflection manner on the wireless channel, the transceiver module is further configured to: receiving a registration response frame sent by the network equipment on the wireless channel; and sending second data to the network equipment on the wireless channel in the back reflection mode.

In a possible design, when the transceiver module sends the second data to the network device in the back reflection manner on the wireless channel, the transceiver module is specifically configured to: and sending the second data to other Internet of things equipment by adopting the back reflection mode on the wireless channel, wherein the other Internet of things equipment is used for forwarding the second data to the network equipment.

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

In a seventh aspect, the present application provides a communication device comprising a processor and a transceiver, the processor and the transceiver communicating with each other through an internal connection; the processor is configured to generate a beacon frame, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the communication apparatus and an internet of things device within a coverage area of the communication apparatus communicate in a back reflection manner on a wireless channel of a wireless local area network; the transceiver is configured to transmit the beacon frame on the wireless channel of the wireless local area network, and perform the communication process with the internet of things device on the wireless channel.

In one possible design, the processor is further to: before the transceiver transmits the beacon frame on the wireless channel of the wireless local area network, controlling a radio frequency signal source to transmit a radio frequency signal, wherein the radio frequency signal is used for charging the internet of things equipment.

In one possible design, the transceiver is further to, prior to transmitting the beacon frame on the wireless channel of the wireless local area network: and sending leading information to a terminal in the coverage range of the communication device in a wireless local area network communication mode, wherein the leading information comprises the time required for the communication device and the Internet of things equipment to occupy the wireless channel when the communication device and the Internet of things equipment communicate in a back reflection mode.

In one possible design, the communication procedure is a scheduled access procedure; when the transceiver and the internet of things device perform the communication process on the wireless channel, the transceiver and the internet of things device are specifically configured to: transmitting a schedule frame to at least one first internet of things device on the wireless channel, the schedule frame including identification information of the at least one first internet of things device, the first internet of things device being an internet of things device that has been registered in the communication apparatus; and receiving first data sent by the at least one first internet of things device in the back reflection mode on the wireless channel.

In one possible design, when the transceiver transmits a schedule frame to at least one first internet of things device over the wireless channel, the transceiver is specifically configured to: the scheduling frame is sent to other internet of things devices on the wireless channel, and the other internet of things devices are used for forwarding the scheduling frame to the at least one first internet of things device; when the transceiver receives, on the wireless channel, first data sent by the at least one first internet of things device in the back reflection manner, the transceiver is specifically configured to: and receiving first data which are transmitted by the other Internet of things equipment and reported by the at least one first Internet of things equipment in the back reflection mode on the wireless channel.

In one possible design, the communication procedure is a random access procedure; when the transceiver and the internet of things device perform the communication process on the wireless channel, the transceiver and the internet of things device are specifically configured to: receiving a registration request frame sent by at least one second networking device in the back reflection mode on the wireless channel, wherein the registration request frame at least comprises identification information of the second networking device, and the second networking device is an internet of things device which is not registered in the communication device.

In one possible design, after receiving the registration request frame sent by the at least one second networked device over the wireless channel, the transceiver is further configured to: transmitting a registration response frame to the at least one second networked device over the wireless channel; and receiving second data sent by the at least one second networking device in the back reflection mode on the wireless channel.

In a possible design, when the transceiver receives, on the wireless channel, the second data sent by the at least one second networking device in the back reflection manner, the transceiver is specifically configured to: and receiving second data which are transmitted by other Internet of things equipment in a back reflection mode and reported by the at least one second Internet of things equipment on the wireless channel.

In a possible design, when the processor controls the rf signal source to transmit the rf signal, the processor is specifically configured to: and sending triggering information to the radio frequency signal source through the transceiver, wherein the triggering information is used for triggering the radio frequency signal source to send the radio frequency signal.

In an eighth aspect, the present application provides a communication apparatus, comprising: a processor and a transceiver, the processor and the transceiver communicating with each other through an internal connection; the transceiver is configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and the communication apparatus communicate in a back reflection manner on the wireless channel of the wireless local area network; performing the communication procedure with the network device over the wireless channel.

In one possible design, before receiving the beacon frame transmitted by the network device on the wireless channel of the wireless local area network, the transceiver is further configured to: and receiving a radio frequency signal sent by a radio frequency signal source, wherein the radio frequency signal is used for charging the communication device.

In one possible design, the communication procedure is a scheduled access procedure; when the transceiver and the network device perform the communication process on the wireless channel, the transceiver is specifically configured to: receiving a schedule frame transmitted by the network device on the wireless channel, the schedule frame including identification information of the communication apparatus, the communication apparatus being an internet of things device that has been registered in the network device; and sending first data to the network equipment on the wireless channel in the back reflection mode.

In one possible design, when receiving the schedule frame sent by the network device on the wireless channel, the transceiver is specifically configured to: receiving scheduling frames of the network equipment forwarded by other Internet of things equipment on the wireless channel; when the transceiver transmits the first data to the network device in the wireless channel in the back reflection manner, the transceiver is specifically configured to: and sending the first data to other Internet of things equipment by adopting the back reflection mode on the wireless channel, wherein the other Internet of things equipment is used for forwarding the first data to the network equipment.

In a ninth aspect, the present application provides a communication apparatus comprising: a processor and a transceiver, the processor and the transceiver communicating with each other through an internal connection; the transceiver is configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and the communication apparatus communicate in a back reflection manner on the wireless channel of the wireless local area network; performing the communication procedure with the network device over the wireless channel.

In one possible design, the communication procedure is a random access procedure; when the transceiver and the network device perform the communication process on the wireless channel, the transceiver is specifically configured to: and sending a registration request frame to the network equipment by adopting the back reflection mode on the wireless channel, wherein the registration request frame at least comprises the identification information of the communication device, and the communication device is the equipment of the internet of things which is not registered in the network equipment.

In one possible design, after sending the registration request frame to the network device in the back-reflection manner on the wireless channel, the transceiver is further configured to: receiving a registration response frame sent by the network equipment on the wireless channel; and sending second data to the network equipment on the wireless channel in the back reflection mode.

In a possible design, when the transceiver transmits the second data to the network device in the back reflection manner on the wireless channel, the transceiver is specifically configured to: and sending the second data to other Internet of things equipment by adopting the back reflection mode on the wireless channel, wherein the other Internet of things equipment is used for forwarding the second data to the network equipment.

In a tenth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when run on a computer, causes the computer to perform the method according to the first, second or third aspect.

In an eleventh aspect, the present application provides a computer program for performing the method of the first, second or 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 not packaged with the processor.

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

Therefore, in each aspect, the network equipment is communicated with the Internet of things equipment in a back reflection mode on a wireless channel of the wireless local area network, so that the communication distance between the network equipment and the Internet of things equipment is increased, the network equipment and the Internet of things equipment can normally communicate without being close to each other, the communication efficiency of the network equipment and the Internet of things equipment is improved, and the communication requirement of the Internet of things is met.

Drawings

Fig. 1 is a schematic view of an application scenario provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a transmitter of an internet of things device provided in the present application;

fig. 3 is a schematic structural diagram of a receiver of an internet of things device provided in the present application;

fig. 4 is a schematic structural diagram of a transmitter of another internet of things device provided in the present application;

fig. 5 is a diagram of a WiFi network architecture based on back reflection mode communication according to an embodiment of the present application;

fig. 6 is a diagram of another WiFi network architecture based on back reflection mode communication according to an embodiment of the present application;

fig. 7 is a schematic view of another application scenario provided in the present application;

fig. 8 is a schematic view of another application scenario provided in the present application;

fig. 9 is a flow chart of a communication method provided herein;

fig. 10 is a diagram of another WiFi network architecture based on back-reflection mode communication provided in the present application;

FIG. 11 is a schematic diagram of a communication protocol provided herein;

FIG. 12 is a diagram illustrating a frame structure provided herein;

fig. 13 is a signaling diagram of a communication method according to an embodiment of the present application;

fig. 14 is a signaling diagram of another communication method according to an embodiment of the present application;

fig. 15 is a signaling diagram of still another communication method according to an embodiment of the present application;

fig. 16 is a signaling diagram of another communication method according to an embodiment of the present application;

fig. 17 is a signaling diagram of another communication method according to an embodiment of the present application;

fig. 18 is a signaling diagram of another communication method according to an embodiment of the present application;

fig. 19 is a signaling diagram of another communication method according to an embodiment of the present application;

fig. 20 is a schematic diagram of a physical frame according to an embodiment of the present application;

fig. 21 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 22 is a schematic diagram of channel estimation provided in an embodiment of the present application;

fig. 23 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 24 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 25 is a schematic structural diagram of another network device according to an embodiment of the present application;

fig. 26 is a schematic structural diagram of an internet of things device provided in an embodiment of the present application.

Detailed Description

The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.

The embodiment of the application can be applied to various types of communication systems. Fig. 1 is a schematic view of an application scenario provided in 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 (AP) of a Wireless Local Area Network (WLAN), an Evolved Node B (eNB or eNodeB) of 4G, a base station of next generation communication, such as a New Radio Access Technology (NR) base station (next generation Node B) or a small station (gbb) of 5G, a micro station, a relay station, a Transmission and Reception Point (TRP), a Road Side Unit (RSU), and the like. In this embodiment, the base stations in the communication systems of different communication systems are different. For the sake of distinction, a base station of the 4G communication system is referred to as a Long Term Evolution (LTE) eNB, a base station of the 5G communication system is referred to as an NR gNB, and a base station supporting both the 4G communication system and the 5G communication system is referred to as an evolved Long Term Evolution (LTE) eNB.

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 or smart cards, and the like.

3) "plurality" means two or more, and other terms are analogous. "and/or" describes the corresponding relationship of the associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate that: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

It should be noted that the number and the types of the internet of things devices 12 included in the communication system shown in fig. 1 are merely examples, and the embodiments of the present application are not limited thereto. For example, more internet of things devices 12 communicating with the network device 11 may be included, which are not depicted in the drawings for simplicity. Furthermore, 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, and may also include a terminal, a core network node, or a device for carrying a virtualized network function, which is obvious to those skilled in the art and is not described herein in detail.

In addition, the embodiments of the present application can be applied not only to the internet of things, but also to a 4G wireless communication system represented by Long Term Evolution (LTE), a vehicle-to-outside (V2X) communication system, a Device-to-Device (D2D) communication system, a subsequent evolution of LTE, and the like. Or, it can also be applied to the next generation wireless communication system, i.e. 5G communication system, and to other systems that may appear in the future, such as wifi network of the next generation, 5G car networking, etc. The embodiment of the application takes the Internet of things as an example.

As shown in fig. 1, the internet of things device 12 may communicate with the network device 11 or other devices in a back reflection (Backscatter) manner. Back reflection is a technique suitable for low cost (low cost) and low power (low power) systems. The device that performs communication in the back reflection mode may not generate a Radio Frequency (RF) signal, but may transmit information by modulating a Radio Frequency signal in an environment, where the Radio Frequency signal in the environment includes a WIreless television signal, a broadcast signal, a signal transmitted by a mobile communication station, a signal transmitted by a WIreless FIdelity (WiFi) AP, a signal transmitted by a dedicated card reader, and the like.

In this embodiment, the internet of things device may be an active device or a passive device. When the internet of things device is a passive device, the internet of things 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 in a Backscatter (backscater) manner. As shown in fig. 2, when there is a radio frequency signal in the environment around the internet of things device, the antenna of the transmitter of the internet of things device may receive the radio frequency signal, and the internet of things device may store energy of the radio frequency signal received by the antenna in an energy storage device, where the energy storage device may be a capacitor. When the energy in the energy storage device reaches a certain threshold value, the Internet of things equipment can start to work. When this thing networking equipment includes the sensor, this thing networking equipment can drive this sensor work.

Radio frequency signals in the surrounding environment of the Internet of things equipment can charge the Internet of things equipment, and the Internet of things equipment can also send information by modulating the radio frequency signals in the surrounding environment. As a feasible implementation manner, the internet of things device sends information by controlling impedance of a sending antenna, taking binary On-Off Keying (OOK) as an example, a radio frequency signal received by the internet of things device is denoted as x, a signal reflected by the internet of things device, that is, a signal sent by the internet of things device is denoted as y, and a relationship between x and y can be represented by the following formula (1):

y＝Γx(1)

where Γ represents a reflection coefficient, Γ may be represented as:

wherein z is_aRepresenting the antenna impedance, z_aTypically 50 ohms.

Representing the antenna impedance z_aConjugation of (1). z is a radical of_iRepresenting the matching impedance. As shown in fig. 2, the internet of things device can be controlled by a switch to obtain the impedance z₁And impedance z₂One impedance is selected as a matching impedance z_iThat is, the matching impedance z_iMay be the impedance z₁And impedance z₂One of them. Optionally, z₁Is equal to

z₂Is not equal to

From the above equation (1), when the impedance z is matched, it can be known_iIs z₁That is to say

When the reflection coefficient Γ is 0, and y is 0, it is stated that the energy of the radio frequency signal x is completely absorbed by the internet of things device, and the internet of things device does not transmit a signal, and at this time, the signal transmitted by the internet of things device may be considered to be "0". When matching impedance z_iIs z₂When the signal is transmitted by the internet of things device, the reflection coefficient Γ ≠ 0, y ≠ 0, which indicates that the energy of the radio frequency signal x is reflected by the internet of things device, and the internet of things device transmits the signal, and at this time, the signal transmitted by the internet of things device can be considered to be "1". When Γ is 1, it indicates that the internet of things device does not absorb energy of the radio frequency signal x, and the internet of things device uses all the radio frequency signal x for a reflection signal.

Assuming that the signal sent by the internet of things device is received by the access point AP, since there may also be a radio frequency signal in the environment around the access point AP, the signal received by the AP receiver includes both the radio frequency signal that is not reflected by the internet of things device and the signal reflected by the internet of things device. Optionally, an Analog-to-Digital Converter (ADC) may be disposed in the AP receiver, and the ADC may convert an Analog signal received by the AP receiver into a Digital signal, for example, the ADC may sample the Analog signal received by the AP receiver to obtain a discrete sampling signal, where the sampling signal may be represented as y [ n ], n represents a sampling sample number, and y [ n ] may be represented as the following formula (2):

y[n]＝x[n]+αB[n]x[n](2)

wherein x [ n ] represents a sampling signal of a radio frequency signal in the surrounding environment, that is, a sampling signal of an original radio frequency signal transmitted by the radio frequency signal source, bn is specifically Γ in the above formula (1), bn x [ n ] represents a sampling signal of a signal reflected by the internet of things device, and α represents an 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 equation (2), the average of the energy of the N sampled signals y [ N ] may be denoted as the received power P of the AP receiver, and the received power P may be expressed as equation (3) below:

when the signal reflected by the internet of things device is 0, Γ is 0, the received power of the AP receiver

When the signal reflected by the internet of things 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 internet of things equipment are different, the received power of the AP receiver is different, and the AP can demodulate the signals reflected by the internet of things equipment according to the received power of the receiver.

Since the ADC consumes more power, the ADC is typically located in an actively powered AP. When the internet of things device is a passive device, the internet of things device generally receives a signal sent by the AP by using an analog circuit receiving method. As shown in fig. 3, the receiver of the internet of things device includes an Envelope averager (Envelope averager)31, a Threshold Calculator (Threshold Calculator)32, a Comparator (Comparator)33, and a decoder 34. The packet drop averager 31 performs averaging and smoothing processing on the signal received by the antenna, and outputs signal energy. The threshold calculator 32 may be used to calculate the threshold value. The comparator 33 compares the signal energy output from the packet averaging unit 31 with the threshold value output from the threshold calculator 32, thereby determining whether the signal received by the antenna is 0 or 1.

In another possible mode, the internet of things device may further modulate a radio frequency signal in the surrounding environment by using a Quadrature Phase Shift Keying (QPSK) or 16-symbol Quadrature Amplitude Modulation (QAM), and send the modulated signal to the AP. Fig. 4 is a schematic structural diagram of a transmitter of the internet of things device modulated in a QAM manner. Can be used forOptionally, the radio frequency signal received by the antenna is denoted as x, the signal reflected by the antenna, that is, the signal transmitted by the internet of things device is denoted as y, and the relationship between x and y is shown in equation (1), where Γ represents a reflection coefficient, and Γ may be represented as:

as shown in fig. 4, matching impedance z_iThere are many options available, in particular, matching the impedance z_iMay be z₁、z₂…….z_MThat is, the matching impedance z_iThere can be M values when matching impedance z_iWhen the value changes, the value of Γ changes, resulting in the value of y also changing, namely the signal that thing networking equipment reflected changes.

In the prior art, the most widely used technology of back reflection (Backscatter) is the Radio Frequency Identification (RFID) technology, which consists of two parts: the card Reader comprises a card Reader (Reader) and a Tag (Tag), wherein the card Reader comprises a receiver and a radio frequency signal Source (RF Source), and the Tag can be specifically an entrance guard card, a bus card, a radio frequency Tag of a commodity, a bank card swiping machine and the like. The working principle of radio frequency identification is as follows: the label is close to the card reader, and obtains energy through a radio frequency signal sent by a radio frequency signal source in the card reader. After the tag obtains energy, the reader sends an inquiry signal to the tag in a back reflection mode. The label receives the inquiry signal by adopting the analog circuit receiving method and feeds back related information to the card reader by adopting a back reflection mode. The receiver of the card reader may receive the information sent by the tag by using an analog circuit receiving method, or may receive the information sent by the tag by using the above-mentioned digital signal processing method. As an alternative, when the tag approaches the card reader, the card reader modulates the radio frequency signal sent by the radio frequency signal source to obtain a modulated signal, and the modulated signal carries the query signal of the card reader and can also charge the tag.

Therefore, in the radio frequency identification technology, the card reader and the tag can normally work only when the card reader and the tag need to be close to each other or even when the distance between the card reader and the tag is 0. With the Internet of things (IOT) demand for interconnection of everything, rfid technology may not be able to meet the demand. In order to meet the requirement of the Internet of things (IOT) for interconnection of everything, embodiments of the present application provide a method that combines a back reflection technology with a WIreless local area network, for example, a WIreless FIdelity (WiFi) technology, that is, a network device and an Internet of things device may communicate in a back reflection manner on a WIreless channel of the WIreless local area network, for example, WiFi.

In the embodiment of the present application, a WiFi system that performs communication in a Back reflection manner on a wireless channel of a wireless local area network, for example, WiFi, is referred to as a Back reflection WiFi (Back-Fi) system. An AP that communicates in a Back-reflection manner on a wireless channel of a wireless local area network, such as WiFi, is denoted as Back-Fi AP. A device which communicates in a Back reflection mode on a wireless local area network, for example, a WiFi wireless channel, is denoted as a Back-Fi device, and the Back-Fi device is specifically an internet of things device. The Back-Fi AP and the Internet of things equipment work on a WiFi frequency band, such as a 2.4GHz frequency band and a 5GHz frequency band. The Back-Fi AP can preempt a wireless channel of WiFi based on a Carrier Sense Multiple Access (CSMA) principle. The operating bandwidth of the Back-Fi AP is the same as the operating bandwidth of the WiFi AP, e.g., occupying a 20MHz channel or N consecutive 20MHz channels. The frequency of operation of the Back-Fi device may be a fixed frequency.

Fig. 5 is a schematic diagram of a WiFi network architecture based on back reflection communication according to an embodiment of the present application. As shown in fig. 5, 51 denotes an access point AP, and in a possible case, the access point 51 only supports a Back-reflection mode to communicate with the internet of things device, that is, the access point 51 is a Back-Fi AP. In another possible scenario, the access point 51 supports both the WiFi communication mode and the Back reflection mode, that is, the access point 51 is both a WiFi AP and a Back-Fi AP. Optionally, the access point 51 operates in a WiFi mode or a Back-Fi mode by using Time Division Duplexing (TDD) or Frequency Division Duplexing (FDD). The WiFi network architecture diagram shown in fig. 5 is applicable to a scenario with a short-distance coverage area of the access point 51, and the access point 51 can directly communicate with internet of things devices in the coverage area thereof in a back reflection manner. Optionally, a radio frequency signal source is arranged in the access point 51, the radio frequency signal sent by the radio frequency signal source is used for charging the internet of things device in the coverage area of the access point 51, the internet of things device 52 is one of a plurality of internet of things devices in the coverage area of the access point 51, the distance between the internet of things device 52 and the access point 51 is short, and the access point 51 and the internet of things device 52 can directly communicate on a wireless channel of the WiFi network in a back reflection mode.

Fig. 6 is a diagram of another WiFi network architecture based on back reflection mode communication according to an embodiment of the present application. The WiFi network architecture diagram shown in fig. 6 may be applicable to a scenario where the access point 51 covers a long distance, in which case the rf signal source and the access point 51 may be independent devices, or the access point 51 may include the rf signal source. At this time, the modes of the access point 51 communicating with the internet of things devices in the coverage area thereof are as follows:

one mode is: an internet-of-things device, such as the internet-of-things device 61, located closer to the access point 51 may communicate directly with the access point 51.

The other mode is as follows: the internet of things devices far away from the access point 51 need to relay other internet of things devices. For example, the internet of things device 62 is far away from the access point 51, and information sent by the access point 51 to the internet of things device 62 needs to be forwarded through the internet of things device 63. For another example, the internet of things device 64 is far away from the access point 51, and the information sent to the access point 51 by the internet of things device 64 needs to be forwarded through the internet of things device 65.

Yet another mode is: a radio frequency signal source exists near the internet of things device far away from the access point 51, for example, a radio frequency signal source 67 exists near the internet of things device 66, and the radio frequency signal source 67 can provide a stable and strong radio frequency signal for the internet of things device 66, so that the internet of things device 66 can directly send information to the access point 51.

The 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 the application scenario, the internet of things device may be a passive sensor, the passive sensor interacts with an AP in a Back reflection manner, the AP is a WiFi AP and a Back-Fi AP, and when the AP communicates with a terminal in a coverage area thereof, such as a smartphone, a notebook, a tablet computer, etc., which support WiFi communication, the AP is a WiFi AP. When the AP and the passive sensor in the coverage range of the AP communicate in a Back reflection mode, the AP is a Back-Fi AP. When the AP is a Back-Fi AP, the passive sensor can be charged through a radio frequency signal in the surrounding environment, and interacts with the AP in a Back reflection mode on a 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., and the passive sensor transmits the detected data to the AP in a back reflection manner over a WiFi wireless channel. Because the passive sensor does not need to be powered by a battery, the passive sensor can be placed at any position and can be used for a long time, and therefore the effects of energy conservation and environmental protection are achieved.

In addition, the network architecture shown in fig. 5 or fig. 6 can also be applied to the application scenario of logistics and warehousing management shown in fig. 8. In the application scenario, the internet of things device may specifically be a radio frequency tag, and each commodity may be provided with a radio frequency tag. The radio frequency tag can send the commodity information to the AP in a back reflection mode on a wireless channel of WiFi. Or the AP sends query information to the radio frequency tags in the coverage area of the AP in real time in a back reflection mode on the wireless channel of the WiFi, and the radio frequency tags in the coverage area of the AP send the commodity information to the AP in the wireless channel of the WiFi in the back reflection mode after receiving the query information. Compared with the prior art that the card reader and the label can normally work only when needing to be close to each other in the radio frequency identification technology, the logistics and warehousing management efficiency is improved.

The embodiment of the present application provides a communication method between a network device and an internet of things device on the basis of combining a back reflection technology and a WIreless local area network, for example, a WIreless-FIdelity (WiFi) technology, and the method is described below with reference to a specific embodiment.

Fig. 9 is a flowchart of a communication method provided in the present application. As shown in fig. 9, the communication method according to this embodiment includes the following steps:

step S901, a network device sends a beacon frame on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and an internet of things device within a coverage area of the network device communicate in a back reflection manner on the wireless channel of the wireless local area network.

In this embodiment, the wireless local area network may specifically be WiFi, and the network device operates in a frequency band of the WiFi, for example, a 2.4GHz frequency band and a 5GHz frequency band, taking the 2.4GHz frequency band as an example, a frequency range of the 2.4GHz frequency band is 2.400GHz-2.4835GHz, which is a total bandwidth of 83.5M, and the bandwidth of 83.5M may be divided into a plurality of channels, where 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 obtained by dividing a bandwidth corresponding to a frequency band of WiFi.

The network device may specifically be an access point AP that only supports the communication in the Back reflection mode, that is, a Back-Fi AP, or may be an AP that supports both the WiFi communication mode and the Back reflection mode. As shown in fig. 5 or fig. 6, after preempting a wireless channel of WiFi, the access point 51 may communicate with the internet-of-things devices in the coverage area of the access point 51 on the wireless channel of WiFi. As a possible implementation manner, the access point 51 may actively send a radio frequency signal to the internet of things devices in the coverage area thereof, for example, a radio frequency signal source is disposed in the access point 51. The internet of things device reflects the radio frequency signal actively sent by the access point 51 in a back reflection mode, and sends the reflected signal to the access point 51, so as to realize communication between the access point 51 and the internet of things device.

As another possible implementation manner, the access point 51 may actively send a radio frequency signal to the internet of things devices in the coverage area of the access point, where the internet of things devices reflect radio frequency signals actively sent by other devices around the access point 51 in a back reflection manner and send the reflected signals to the access point 51, so as to implement communication between the access point 51 and the internet of things devices. Other devices can be mobile phones, tablet computers and other terminals.

As another possible implementation manner, the access point 51 reflects radio frequency signals of other devices around the access point 51 in a back reflection manner, and the access point 51 sends the reflected signals to the internet of things devices in the coverage area of the access point 51. This thing networking equipment adopts the back reflection mode to reflect the radio frequency signal of other equipment around this thing networking equipment, and this thing networking equipment sends its reflection signal for access point 51 to realize the communication between this access point 51 and the thing networking equipment. Other devices can be mobile phones, tablet computers and other terminals.

Specifically, when the access point 51 communicates with the internet of things device in the coverage area of the access point on the WiFi wireless channel, different communication processes may be performed, in different communication processes, the internet of things device communicating with the access point 51 is different, and the information received and sent by the access point 51 and the internet of things device is different. For example, the communication process may be divided into a Schedule Access process (Schedule Access) and a Random Access process (Random Access), in the Schedule Access process, the internet of things device communicating with the Access point 51 is an internet of things device that has been registered in the Access point 51, and the Access point 51 may specify one or more internet of things devices that have been registered to report data. In the random access process, the internet-of-things device communicating with the access point 51 is an internet-of-things device that is not registered in the access point 51. In order to enable the internet of things devices within the coverage area of the access point 51 to determine that the communication process with the access point 51 is a scheduling access process or a random access process, the access point 51 sends a Beacon (Beacon) frame on a WiFi wireless channel, specifically, the access point 51 may send the Beacon frame to the internet of things devices within the coverage area of the access point 51 by modulating a radio frequency signal sent by a radio frequency signal source inside the access point 51, or the access point 51 may send the Beacon frame to the internet of things devices within the coverage area of the access point by reflecting radio frequency signals sent by other devices in the surrounding environment, that is, by adopting a back reflection mode. Specifically, the access point 51 may broadcast the beacon frame in its coverage area, where the beacon frame includes indication information, and the indication information is used to indicate that, after the access point 51 transmits the beacon frame, a communication process in which the access point 51 communicates with the internet of things devices in its coverage area in a back reflection manner on a 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, an ID of the Access point 51, a Media Access Control Address (MAC), and the like. In other embodiments, the beacon frame may also include a time for a scheduled access procedure duration or a time for a random access procedure duration. For example, the beacon frame includes indication information indicating that a communication process in which the access point 51 communicates with the internet of things devices in the coverage area thereof in a back reflection manner is a scheduled access process, and the beacon frame may further include a duration of the scheduled access process. If the indication information included in the beacon frame indicates that the communication process in which the access point 51 communicates with the internet of things devices in the coverage area thereof in a back reflection manner is a random access process, the beacon frame may further include a duration of the random access 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 in its coverage area, the communication procedure indicated by the indication information is performed on the wireless channel of the WiFi by the internet-of-things devices in its coverage area. Correspondingly, after the internet of things equipment 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, a communication process in which the access point 51 and the internet of things equipment within the coverage area communicate in a back reflection mode is determined, and the communication process is performed 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 scheduled access process, the access point 51 sends a scheduling frame to the specified internet of things device after sending the beacon frame, where the scheduling frame may include identification information of at least one internet of things device that has been registered in the access point 51, so that the at least one internet of things 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 performs the random access process with the internet of things devices that are not registered in the coverage area of the access point 51. In addition, during the random access process, the internet of things device that is not registered in the access point 51 may also report emergency information, for example, an alarm signal of a fire sensor, to the access point 51.

In the embodiment of the application, the internet of things device may be an active device or a passive device. When the internet of things equipment is passive equipment, the internet of things equipment can be charged through radio frequency signals in the surrounding environment, and as a feasible implementation mode, the network equipment such as an access point controls a radio frequency signal source to send radio frequency signals, and the radio frequency signals are used for charging the internet of things equipment within the coverage range of the access point. In other embodiments, the internet of things device may also be charged by other methods, which is not limited to this. The access point may control the rf signal source to transmit the rf signal according to the following methods:

one possible way is: the access point comprises 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: the access point and the radio frequency signal source are mutually independent devices, the access point sends Trigger information (Trigger) to the radio frequency signal source, and the Trigger information is used for triggering the radio frequency signal source to send radio frequency signals.

In addition, the internet of things device and the terminal supporting WiFi communication may exist simultaneously within the coverage area of the access point, and the terminal may be specifically a user terminal, for example, a smart phone, a notebook computer, a tablet computer, and the like. Because the access point needs to occupy the wireless channel of the WiFi when communicating with the internet of things device, before the access point communicates with the internet of things device, for example, before the access point sends a beacon frame on the wireless channel of the WiFi in a back reflection manner, the access point may also send Preamble information (Legacy Preamble) to the terminal in the coverage area of the access point in a WiFi communication manner, where the Preamble information includes time that the access point needs to occupy the wireless channel of the WiFi when communicating with the internet of things device in the coverage area of the access point in the back reflection manner. As shown in fig. 10, the coverage area of the access point 51 includes not only the internet of things device, 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 sends preamble information to the terminal within the coverage of the access point 51 in a WiFi communication mode, so that the terminal determines the time that the access point 51 and the internet of things device occupy the wireless channel when communicating in a back reflection mode, and in the time, the terminal and the access point 51 do not perform WiFi communication.

As a possible embodiment, the access point periodically occupies a wireless channel of the WiFi, and communicates with the internet of things device in the coverage area of the access point on the wireless channel in a back reflection manner.

As shown in fig. 11, the access point performs WiFi communication with terminals in its coverage area in the time periods t1 and t3, the access point performs WiFi communication with internet of things devices in its coverage area in the time periods t2 and t4, and so on. The access point has periodicity for communicating with the internet of things devices within its coverage area. Taking the time period t2 as an example, the access point sends preamble information to the terminals in its coverage area in a WiFi communication manner, so as to indicate the time that the access point needs to occupy the wireless channel of the WiFi when communicating with the internet of things devices in its coverage area. In addition, if the internet of things equipment in the coverage range of the access point is passive equipment and the access point and the radio frequency signal source are mutually independent equipment, the access point can also send trigger information to the radio frequency signal source so as to trigger the radio frequency signal source to send a radio frequency signal to charge the internet of things equipment. The trigger information may have several possible implementations as follows:

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

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

When the radio frequency signal source starts to send the radio frequency signal after detecting the trigger information, in 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 can be recorded as the MUTE time period. Specifically, the access point may send the trigger information to the radio frequency signal source in a WiFi communication manner, and may also send the trigger information to the radio frequency signal source in a back reflection manner, which is not limited herein. As shown in fig. 11, the radio frequency signal source starts to transmit a radio frequency signal from the start time of the MUTE time period, and the radio frequency signal may be used in a process that the access point communicates with the internet of things device in a back reflection manner, in addition to charging the internet of things device in the MUTE time period. In the process that the access point communicates with the internet of things device in a back reflection mode, the access point sends a beacon frame to the internet of things device within the coverage area of the access point, and the information carried by the beacon frame is specifically as described above and is not described herein again. After the access point transmits the beacon frame to the internet of things devices in the coverage area of the access point, the access point and the internet of things devices in the coverage area of the access point communicate according to the communication process indicated by the indication information in the beacon frame, for example, communicate through a random access process or a scheduled access process.

It is to be understood that the communication process shown in fig. 11 is only an example and is not limited thereto. In other embodiments, if the internet of things device is an active device, or the internet of things device is charged in another manner, or the access point does not include a radio frequency signal source, the access point may not send the trigger information. In addition, if there is no terminal based on WiFi communication in the coverage of the access point, the access point may not transmit the preamble information. In addition, the order of the random access process and the scheduled access process between the access point and the internet of things device is not limited in this embodiment.

According to the embodiment, the network equipment is communicated with the Internet of things equipment in a back reflection mode on a wireless channel of a wireless local area network, so that the communication distance between the network equipment and the Internet of things equipment is increased, the network equipment and the Internet of things equipment can normally communicate without being close to each other, the communication efficiency of the network equipment and the Internet of things equipment is improved, and the communication requirement of the Internet of things is met.

The frame structure and specific communication procedures used in the random access procedure and the scheduled access procedure are described in detail below. The frame header part of the frame structure is specifically shown in the following table 1:

TABLE 1

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

TABLE 2

Fig. 12 shows frame structures of a beacon frame, an acknowledgement frame, a negative acknowledgement frame, a scheduling frame, a registration request frame, a registration response frame, a registration reject frame, a heartbeat frame, and a data frame according to the present 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, which may occupy two bytes, and a Frame Check Sequence (FCS). The duration field includes a duration indicating a length of time that a scheduled access procedure following the beacon frame is continued or a length of time that a random access procedure is continued. The beacon frame can be divided into two types, wherein the indication information in the beacon frame of the first type is used for indicating that the beacon frame is followed by a scheduling access process, and the indication information in the beacon frame of the second type is used for indicating that the beacon frame is followed by a 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 acknowledgement frame or the negative acknowledgement frame is used for a DATA acknowledgement (DATA) frame, which may be a DATA frame reported by the internet of things device to the network device. And if the network equipment correctly receives the data frame, the network equipment sends a confirmation response frame to the Internet of things equipment. And if the network equipment cannot correctly receive the data frame, the network equipment sends a negative response frame to the Internet of things equipment.

As shown in fig. 12, the frame structure of the schedule frame includes a frame header and a frame check sequence. The scheduling frame is used for the network equipment to schedule the uploading information of the specified internet of things equipment, and the destination address in the frame header of the scheduling frame is the identification information of the scheduled internet of things equipment. And after receiving the scheduling frame, the scheduled Internet of things equipment sends a data frame to the network equipment.

As shown in fig. 12, the frame structures of the registration request frame, the registration response frame, and the registration reject frame include a frame header and a frame check sequence. The registration request frame is used for registering the internet of things device to the network device, and if the network device successfully receives the registration request frame or the network device allows the internet of things device to register, a registration response frame is sent to the internet of things device. And if the network equipment does not successfully receive the registration request frame or the network equipment does not allow the Internet of things equipment to register, sending a registration rejection frame to the Internet of things equipment.

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 for the network equipment to detect whether the Internet of things equipment works normally or whether the Internet of things equipment is in the coverage range of the network equipment.

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 internet of things equipment to the network equipment.

In this embodiment, the length of the frame header may be 20 bytes, i.e., 160 bits. The frame Check sequence may specifically be a Cyclic Redundancy Check (CRC) Check bit with a length of 4 bytes, that is, a length of 32 bits. In other embodiments, the length of the frame header may be greater than 20 bytes, for example, the frame header may include a plurality of destination addresses, one destination address is 48 bits in length, n destination addresses are n × 48 bits in length, n is greater than or equal to 1, and the length of the frame header is (160+ (n-1) × 48) bits. Taking the scheduling frame as an example, the network device may schedule at least one piece of internet of things device to report information, and therefore, the frame header portion of the scheduling frame may include identification information of the at least one piece of internet of things device, that is, at least one destination address.

In the scheduling access process, the following possibilities are available for the network device to communicate with the internet of things devices in the coverage area of the network device on the wireless channel of the wireless local area network:

one possible scenario is: as shown in fig. 13, the process of performing scheduling access on the wireless channel by the network device and the internet of things device includes the following steps:

step S1301, the network device sends a scheduling frame to the first internet of things device on a 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 devices is not limited herein, and may be one or multiple. Taking an example here, the destination address in the frame header of the scheduling frame is 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 schedule frame, the first internet of things device sends a data frame to the network device, where a 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 further schedule a plurality of first internet of things devices that have been registered in the network device to report the first data, where in this case, a frame header of a scheduling frame sent by the network device includes a plurality of destination addresses, each destination address is identification information of one first internet of things device, and when the plurality of first internet of things devices receive the scheduling frame, the network device sends a data frame to the network device, where a data field of the data frame includes the first data.

Another possible scenario is: as shown in fig. 14, the process of performing scheduling access on the wireless channel by the network device and the internet of things device includes the following steps:

step S1401, the network device sends a schedule frame to a third internet of things device on the wireless channel.

The third internet of things device may specifically be an internet of things device within a coverage area of the network device, and the third internet of things device may be an internet of things device registered in the network device, or an internet of things device that is not registered in the network device. In this embodiment, the network device may be far away from the first internet of things device, and when the network device needs to send the schedule frame to the first internet of things device, the network device may forward the schedule frame to the first internet of things device through the third internet of things device. Specifically, the source address in the frame header of the scheduling frame is identification information of the network device, the destination address is identification information of the first internet of things device, the relay address is identification information of the third internet of things device, and the relay identifier is 0.

Step S1402, the third internet of things device forwards the schedule frame to the first internet of things device on the wireless channel in a back reflection manner.

And after the third Internet of things equipment receives the scheduling frame, keeping the source address, the destination address and the relay address in the scheduling frame unchanged, modifying the relay identifier to be 1, and forwarding the scheduling frame after modifying the relay identifier to the first Internet of things equipment on the wireless channel in a back reflection mode.

Step S1403, the first internet of things device transmits 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 mode on the wireless channel, a data field of the data frame comprises first data, a source address in a frame header of the data frame is identification information of the first internet of things device, a destination address is identification information of the network device, a relay address is identification information of the third internet of things device, and a relay identifier is set to be 0.

Step S1404, the third internet of things device sends a confirmation response frame to the first internet of things device in a back reflection manner on the wireless channel.

After the third internet of things device receives the data frame sent by the first internet of things device, a back reflection mode is adopted on the wireless channel to feed back a confirmation response frame to the first internet of things device.

Step S1405, the third internet of things device transmits the data frame to the network device in a back reflection manner over the wireless channel.

The third internet of things equipment keeps the source address, the destination address and the relay address in the data frame unchanged, modifies the relay identifier in the first data into 1, and forwards the data frame after modifying the relay identifier to the network equipment on the wireless channel in a back reflection mode.

Step S1406, the network device sends a confirmation response frame to the third internet of things device in a back reflection manner on the wireless channel.

And after the network equipment successfully receives the data frame, sending a confirmation response frame to the third Internet of things equipment on the wireless channel in a back reflection mode.

In this embodiment, the order of step S1404 and step S1405 is not limited. In addition, the first internet of things device may not be limited to one, and may also be multiple, when the network device needs to schedule the multiple first internet of things devices to report data, the process that the third internet of things device sends the schedule frame to the multiple first internet of things devices respectively, and the process that the third internet of things device forwards the data frame of each of the multiple first internet of things devices to the network device are the same as the process shown in fig. 14, and details are not repeated here.

Yet another possible scenario is: as shown in fig. 15, the process of performing scheduling access on the wireless channel by the network device and the internet of things device includes the following steps:

step S1501, the network device sends a heartbeat frame to the first internet of things device in a back reflection manner on the wireless channel.

When the network device needs to detect whether a first internet of things device which is already registered works normally or not, or the network device needs to detect whether the first internet of things device which is already registered is in the coverage range of the network device, the network device can send a heartbeat frame to the first internet of things device on the wireless channel in a back reflection mode, 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 in a back reflection manner on the wireless channel.

And after the first internet of things device successfully receives the heartbeat frame, sending a confirmation response frame to the network device on the wireless channel in a back reflection mode.

It can be understood that the network device may further detect whether the plurality of first internet of things devices are working normally or detect whether the plurality of first internet of things devices are within a coverage range of the network device, at this time, the heartbeat frame sent by the network device may include a plurality of destination addresses, and each destination address is identification information of one 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 a scheduling access process, and in the scheduling access process, a specific communication process in which a network device and an internet of things device within a coverage area of the network device communicate in a back reflection manner on a wireless channel of a wireless local area network is not limited to this.

In the random access process, the following possibilities are possible for a network device to communicate with an internet of things device in its coverage area on a wireless channel of a wireless local area network:

one possible scenario is: as shown in fig. 16, the random access procedure performed by the network device and the internet of things device on the wireless channel includes the following steps:

step S1601, the second networked device sends a registration request frame to the network device in a back reflection manner on the wireless channel.

In this embodiment, an internet of things device that is not registered in the network device is denoted as a second internet of things device, where the number of the second internet of things device is not limited herein, and may be one or multiple, and one is taken as an example to schematically illustrate here. When a second networking device receives a beacon frame sent by the network device, and determines that the network device enters a random access process after sending the beacon frame according to indication information in the beacon frame, and the second networking device determines that the second networking device is not registered in the network device, the second networking device sends a registration request frame to the network device in a back reflection mode on the wireless channel, where the registration request frame at least includes identification information of the second networking device, for example, a source address in a frame header of the registration request frame is the identification information of the second networking device, and a destination address in the frame header is the identification information of the network device.

Step S1602, the network device sends a registration response frame to the second networked device over the wireless channel.

If the network device successfully receives the registration request frame of the second networked device, or the network device allows the second networked device to register, the network device sends a registration response frame to the second networked device over the wireless channel.

In other embodiments, if the network device does not successfully receive the registration request frame of the second networked device, or the network device does not allow the second networked device to register, the network device sends a registration reject frame to the second networked device over the wireless channel, as shown in fig. 17.

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

As a possible manner, as shown in fig. 18, after receiving the registration response frame sent by the network device, the second networked device sends a data frame to the network device in a back reflection manner on the wireless channel, where a data field of the data frame includes the second data. And if the network equipment successfully receives the data frame, sending an acknowledgement frame to the second networking equipment. And if the network equipment does not successfully receive the data frame, sending a negative acknowledgement frame to the second networking equipment.

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

Yet another possible scenario is: as shown in fig. 19, the process of performing random access on the wireless channel by the network device and the internet of things device includes the following steps:

step S1901, the second internet-of-things device sends the data frame to the fourth internet-of-things device in a back reflection manner on the wireless channel.

The fourth internet of things device may specifically be an internet of things device within a coverage area of the network device, and the fourth internet of things device may be an internet of things device registered in the network device or an internet of things device that is not registered in the network device. In this embodiment, the network device may be relatively distant from the second networked device. When the second internet-of-things device sends the data frame to the network device, the second internet-of-things device can forward the data frame to the network device through the fourth internet-of-things device. Specifically, the source address in the frame header of the data frame is identification information of the second internet of things device, the destination address is identification information of the network device, the relay address is identification information of the fourth internet of things device, and the relay identifier is 0.

Step S1902, the fourth internet of things device sends a confirmation response frame to the second internet of things device in a back reflection manner on the wireless channel.

And after the fourth internet of things device successfully receives the data frame, sending a confirmation response frame to the second internet of things device in a back reflection mode on the wireless channel.

Step S1903, the fourth internet of things device forwards the data frame to the network device on the wireless channel in a back reflection manner.

And the fourth Internet of things equipment keeps the source address, the destination address and the relay address in the data frame unchanged, modifies the relay identifier in the data frame into 1, and transmits the data frame with the modified relay identifier to the network equipment on the wireless channel in a back reflection mode.

Step S1904, the network device sends a confirmation response frame to the fourth internet of things device on the wireless channel.

After the network device successfully receives the data frame, the network device sends a confirmation response frame to the fourth internet of things device on the wireless channel.

In this embodiment, the order of step S1902 and step S1903 is not limited. In addition, the second internet of things device may not be limited to one, and may also be multiple, when multiple second internet of things devices send data frames to the network device, a process of forwarding the data frame of each second internet of things device by the fourth internet of things device is the same as the process shown in fig. 19, and details are not repeated here.

It should be noted that the communication processes shown in fig. 16 to fig. 19 are only examples of a random access process, and in the random access process, a specific communication process in which a network device and an internet-of-things device within the coverage area of the network device communicate in a back reflection manner on a wireless channel of a wireless local area network is not limited to this specific communication process.

In addition, the embodiment of the present application further provides a physical frame corresponding to the MAC frame structure, and it can be understood that the MAC frame is encapsulated in the physical frame, the MAC frame is used for transmission in a data link layer, and the physical frame is used for transmission in a physical layer. As shown in fig. 20, the part 200 is a MAC frame, and each of the downlink physical frame and the uplink physical frame may include a MAC frame, where the MAC frame may be any one of the MAC frames in fig. 12, and the dotted part may be a field in the MAC frame or may not have the dotted part, for example, there is a field in the middle part of the beacon frame and the data frame in fig. 12, and there is no field in the middle part of other types of MAC frames. As shown in fig. 20, the downlink physical frame includes a Short Training Field (STF) and a MAC frame. The uplink physical frame includes a short Training Field (LTF), 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 may be used for channel estimation by the network device. The short training field as the first field of the header of the physical frame can be used for synchronization of the internet of things device. The uplink refers to the information transmission direction from the internet of things device to the network device and from the radio frequency signal source to the network device. The downlink refers to the information sending direction from the radio frequency signal source to the internet of things equipment and from the network equipment to the internet of things equipment.

As shown in FIG. 21, x represents the original RF signal transmitted by the RF signal source, h₁Representing the channel between the radio frequency signal source and the network device, h₁X denotes the signal received by the receiver of the network device and emitted by the radio frequency signal source, i.e. h₁X is the signal that has not been reflected by the internet of things device. h is_bRepresenting the channel h between the radio frequency signal source and the equipment of the Internet of things_bX represents a signal sent by a radio frequency signal source and received by the internet of things equipment. s represents a reflection coefficient, and may be Γ, s × h in the above embodiments_bX represents the signal reflected by the internet of things device. h is_fRepresenting the channel, h, between the network device and the Internet of things device_f*s*h_bX represents a signal reflected by the internet of things device received by the receiver of the network device. Therefore, the signals received by the receiver of the network device include signals emitted by the radio frequency signal source and signals reflected by the internet of things device, and the signals received by the receiver of the network device are denoted as r, and r can be expressed as the following formula (4):

r＝h₁*x+h_f*s*h_b*x (4)

in addition, h is_f*h_bIs marked as h₂And r can be further expressed as: r ═ h₁*x+h₂S x. Because the signal that the radio frequency signal source sent and the signal that thing networking device reflects are mixed together, lead to the network equipment can't directly confirm the signal that thing networking device reflects according to the signal r that the receiver received. S is unknown to the network device, and in addition, the signal reflected by the internet of things device can be changed by changing the reflection coefficient s as described above. According to r ═ h₁*x+h₂S x, h needs to be determined before s is determined₁And h₂。

Specifically, the LTF described above may comprise two parts, one part being denoted as LTF1 and the other part being denoted as LTF 2. As shown in fig. 22, the long training field in the uplink physical frame of the rf signal source includes two parts, one part is denoted as long training field 1, LTF1, and the other part is denoted as long training field 2, LTF 2. The radio frequency signal source and the internet of things device can be agreed in advance, when the radio frequency signal source sends LTF1 (x is LTF 1), the internet of things device pairs h according to the reflection coefficient s is 0_bX is reflected, and the signal received by the receiver of the network device is denoted as r₁，r₁Can be expressed as r₁＝h₁LTF 1. In addition, the radio frequency signal source and the internet of things device may also agree in advance, and when the radio frequency signal source transmits LTF2, that is, x is LTF2, the internet of things device pairs h according to the reflection coefficient s is 1_bX is reflected, and the signal received by the receiver of the network device is denoted as r₂，r₂Can be expressed as r₂＝(h₁+h₂) LTF 2. LTF1 and LTF2 are orthogonal sequences, taking into account multipath effects. Network device according to r₁＝h₁LTF1 and r₂＝(h₁+h₂) LTF2 can calculate h₁And h₂. In addition, in this embodiment, the original rf signal x transmitted by the rf signal source may be a predetermined known signal. According to r ═ h₁*x+h₂S x is known, where x, h are known₁And h₂In this case, the network device may determine, from the signal r received by its receiver,and x, h₁And h₂And calculating s, and further determining the signal reflected by the Internet of things equipment according to the s. Or, according to r ═ h₁*x+h₂S x is known, where x, h are known₁In this case, the network device can calculate h₁X, based on the signal r received by its receiver and the calculated h₁X can calculate h₂S x, further according to h₂S x, x and h₂And calculating s, and determining the signal reflected by the Internet of things equipment according to the s.

It is to be understood that some or all of the steps or operations in the above-described embodiments are merely examples, and other operations or variations of various operations may be performed by the embodiments of the present application. Further, the various steps may be performed in a different order presented in the above-described embodiments, and it is possible that not all of the operations in the above-described embodiments are performed.

It is to be understood that, in the above embodiments, operations or steps implemented by the internet of things device may also be implemented by a component (e.g., a chip or a circuit) available to the internet of things device, and operations or steps implemented by the network device may also be implemented by a component (e.g., a chip or a circuit) available to the network device.

Fig. 23 shows a schematic configuration of a communication apparatus. The communication apparatus may be configured 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 (e.g., a first internet of things device, a second internet of things device), which is specifically referred to the description in the above method embodiment.

The communication device 70 may comprise one or more processors 71, and the processors 71 may also be referred to as processing units, which may implement certain control functions. The processor 71 may be a general purpose processor or a dedicated processor, etc.

In an optional design, the processor 71 may also store instructions 73, which may be executed by the processor, so that the communication device 70 performs the method corresponding to the network device or the internet of things device described in the above method embodiment.

In yet another possible design, the communication device 70 may include circuitry that may implement the functionality of transmitting or receiving or communicating in the foregoing method embodiments.

Optionally, one or more memories 72 may be included in the communication device 70, on which instructions 74 or intermediate data are stored, the instructions 74 being executable on the processor to cause the communication device 70 to perform the methods described in the above method embodiments. Optionally, other related 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 provided separately or may be 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 transceiving circuit, a transceiver, or the like, and is used for implementing transceiving functions of the communication device.

If the communication apparatus is used to implement the operation corresponding to the network device in the foregoing embodiment, for example, the transceiver may send a beacon frame on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and an internet of things device within a coverage area of the network device communicate in a back reflection manner on the wireless channel of the wireless local area network; and performing the communication process with the internet of things device on the wireless channel. The transceiver may further perform other corresponding communication functions. And the processor is used for completing corresponding determination or control operation, and optionally, corresponding instructions can be stored in the memory. The specific processing manner of each component can be referred to the related description of the previous embodiment.

If the communication apparatus is used to implement an operation corresponding to a first internet of things device, for example, a transceiver may receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and the first internet of things device communicate in a back reflection manner on the wireless channel of the wireless local area network; and performing the communication process with the network device over the wireless channel. The transceiver may further perform other corresponding communication functions. And the processor is used for completing corresponding determination or control operation, and optionally, corresponding instructions can be stored in the memory. The specific processing manner of each component can be referred to the related description of the previous embodiment.

If the communication apparatus is used to implement the operation corresponding to the second networking device in the foregoing embodiment, for example, a transceiver may receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and the second networking device communicate in a back reflection manner on the wireless channel of the wireless local area network; and performing the communication process with the network device over the wireless channel. Optionally, the transceiver may be further configured to perform other related communication operations, and the processor may be further configured to perform other corresponding determination or control operations. Optionally, corresponding instructions may also be stored in the memory. The specific processing manner of each component can be referred to the related description of the previous embodiment.

The processors and transceivers described herein may be implemented on Integrated Circuits (ICs), analog ICs, Radio Frequency Integrated Circuits (RFICs), mixed signal ICs, Application Specific Integrated Circuits (ASICs), Printed Circuit Boards (PCBs), electronic devices, and the like. The processor and transceiver may also be fabricated using various 1C process technologies, such as Complementary Metal Oxide Semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (PMOS), Bipolar Junction Transistor (BJT), Bipolar CMOS (bicmos), silicon germanium (SiGe), gallium arsenide (GaAs), and the like.

Alternatively, the communication device may be a stand-alone device or may be part of a larger device. For example, the device may be:

(1) a stand-alone integrated circuit IC, or chip, or system-on-chip or subsystem;

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

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

(4) a module that may be embedded within other devices;

(5) receivers, terminals, cellular telephones, wireless devices, handsets, mobile units, network devices, and the like;

(6) others, and so forth.

Fig. 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; the transceiver module 241 is configured to send a beacon frame on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the communication device and an internet of things device within a coverage area of the communication device communicate on the wireless channel of the wireless local area network in a back reflection manner; and performing the communication process with the internet of things device on the wireless channel.

In fig. 24, further, the communication device 240 may further include: a control module 242, configured to control a radio frequency signal source to send a radio frequency signal before the transceiver module sends a beacon frame on a wireless channel of a wireless local area network, where the radio frequency signal is used to charge the internet of things device.

In a possible manner, the transceiver module 241 may further be configured to: before sending a beacon frame on a wireless channel of a wireless local area network, sending preamble information to a terminal in a coverage area of the communication device in a wireless local area network communication mode, wherein the preamble information comprises time required for the communication device and the Internet of things equipment to occupy the wireless channel when the communication device and the Internet of things equipment communicate in a back reflection mode.

In another possible manner, the communication process is a scheduling access process; the transceiver module 241 and the internet of things device are specifically configured to, when performing the communication process on the wireless channel: transmitting a schedule frame to at least one first internet of things device on the wireless channel, the schedule frame including identification information of the at least one first internet of things device, the first internet of things device being an internet of things device that has been registered in the communication apparatus; and receiving first data sent by the at least one first internet of things device in the back reflection mode on the wireless channel.

Optionally, when the transceiver module 241 sends the schedule frame to at least one first internet of things device on the wireless channel, the transceiver module is specifically configured to: the scheduling frame is sent to other internet of things devices on the wireless channel, and the other internet of things devices are used for forwarding the scheduling frame to the at least one first internet of things device; when the transceiver module 241 receives the first data sent by the at least one first internet of things device in the back reflection manner on the wireless channel, the transceiver module is specifically configured to: and receiving first data which are transmitted by the other Internet of things equipment and reported by the at least one first Internet of things equipment in the back reflection mode on the wireless channel.

Optionally, the communication process is a random access process; the transceiver module 241 and the internet of things device are specifically configured to, when performing the communication process on the wireless channel: receiving a registration request frame sent by at least one second networking device in the back reflection mode on the wireless channel, wherein the registration request frame at least comprises identification information of the second networking device, and the second networking device is an internet of things device which is not registered in the communication device.

Optionally, after the transceiver module 241 receives the registration request frame sent by the at least one second networking device on the wireless channel, it is further configured to: transmitting a registration response frame to the at least one second networked device over the wireless channel; and receiving second data sent by the at least one second networking device in the back reflection mode on the wireless channel.

Optionally, when the transceiver module 241 receives, on the wireless channel, the second data sent by the at least one second networking device in the back reflection manner, specifically configured to: and receiving second data which are transmitted by other Internet of things equipment in a back reflection mode and reported by the at least one second Internet of things equipment on the wireless channel.

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

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

Optionally, when the control module 242 controls the radio frequency signal source to send the radio frequency signal, the control module is specifically configured to: and controlling the transceiver module 241 to send trigger information to the radio frequency signal source, where the trigger information is used to trigger the radio frequency signal source to send the radio frequency signal.

Optionally, the preamble information includes the trigger information.

The communication apparatus in the embodiment shown in fig. 24 may be used to implement the technical solution in the above method embodiment, and the implementation principle and the technical effect of the technical solution may further refer to the relevant description in the method embodiment, and optionally, the communication apparatus may be a network device, and may also be a component (e.g., a chip or a circuit) of the network device.

The embodiment of the application provides a communication device. The communication device includes: a transceiver module; the receiving and sending module is used for receiving a beacon frame sent by network equipment on a wireless channel of a wireless local area network, wherein the beacon frame comprises indication information, and the indication information is used for indicating a communication process that the network equipment and the communication device communicate on the wireless channel of the wireless local area network in a back reflection mode; performing the communication procedure with the network device over the wireless channel.

Further, before the transceiver module receives the beacon frame transmitted by the network device on the wireless channel of the wireless local area network, the transceiver module is further configured to: and receiving a radio frequency signal sent by a radio frequency signal source, wherein the radio frequency signal is used for charging the communication device.

In one possible approach, the communication procedure is a scheduling access procedure; when the transceiver module and the network device perform the communication process on the wireless channel, the transceiver module is specifically configured to: receiving a schedule frame transmitted by the network device on the wireless channel, the schedule frame including identification information of the communication apparatus, the communication apparatus being an internet of things device that has been registered in the network device; and sending first data to the network equipment on the wireless channel in the back reflection mode.

The communication device of this embodiment may be used to implement the technical solutions of the above method embodiments, and reference may be further made to the relevant descriptions in the method embodiments for realizing the principles and technical effects. Optionally, the communication device may be the first physical network device, or may be a component (e.g., a chip or a circuit) of the first physical network device.

The embodiment of the application provides another communication device. The communication device includes: a transceiver module, configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and the communication apparatus communicate in a back reflection manner on the wireless channel of the wireless local area network; performing the communication procedure with the network device over the wireless channel.

In one possible approach, the communication procedure is a random access procedure; when the transceiver module and the network device perform the communication process on the wireless channel, the transceiver module is specifically configured to: and sending a registration request frame to the network equipment by adopting the back reflection mode on the wireless channel, wherein the registration request frame at least comprises the identification information of the communication device, and the communication device is the equipment of the internet of things which is not registered in the network equipment.

Optionally, after the transceiver module sends the registration request frame to the network device in the back reflection manner on the wireless channel, the transceiver module is further configured to: receiving a registration response frame sent by the network equipment on the wireless channel; and sending second data to the network equipment on the wireless channel in the back reflection mode.

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

The communication apparatus of this embodiment may be used to execute the technical solution of the above method embodiment, and the implementation principle and technical effect of the communication apparatus may further refer to the relevant description in the method embodiment, alternatively, the communication apparatus may be a second networking device, and may also be a component (e.g., a chip or a circuit) of the second networking device.

It should be understood that the above division of the modules of the communication device is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling by the processing element in software, and part of the modules can be realized in the form of hardware. For example, the control module may be a processing element that is set up separately, or may be implemented by being integrated in a chip of the communication apparatus, such as a network device, or may be stored in a memory of the communication apparatus in the form of a program, and the processing element of the communication apparatus calls and executes the functions of the above modules. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when some of the above modules are 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 capable of calling programs. As another example, these modules may be integrated together, 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 a radio frequency device 252. In the uplink direction, the radio frequency device 252 receives information sent by the internet of things device through the antenna 251, and sends the information sent by the internet of things device to the baseband device 253 for processing. In the downlink direction, the baseband device 253 processes information of the internet of things device and sends the information to the radio frequency device 252, and the radio frequency device 252 processes the information of the internet of things device and sends the information to the internet of things device through the antenna 251.

The above communication means may be located in the baseband device 253, and in one implementation, the above modules are implemented in the form of a processing element scheduler, for example, the baseband device 253 includes a processing element and a storage element, and the processing element 2531 calls a program stored in the storage element 2532 to execute the method in the above method embodiment. The baseband device 253 may further include an interface 2533, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 252.

In another implementation, the above modules may be one or more processing elements configured to implement the above method, the processing elements being disposed on the baseband device 253, where the processing elements may be integrated circuits, such as: one or more ASICs, or one or more DSPs, or one or more FPGAs, etc. These integrated circuits may 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 processing element 2531 and the storage element 2532 may be integrated in the chip, and the functions of the above methods or the above modules are implemented in the form of calling the stored program of the storage element 2532 by the processing element 2531; or, at least one integrated circuit may be integrated in the chip, so as to implement the functions of the above method or the above modules; or, the above implementation modes may be combined, the functions of some modules are implemented in the form of a processing element calling program, and the functions of some modules are implemented in the form of an integrated circuit.

In any case, the above communication device comprises at least one processing element, a storage element and a communication interface, wherein the at least one processing element is configured to perform the method provided by the above method embodiments. The processing element may: i.e. the way the program stored by the storage element is executed, performs part or all of the steps in the above method embodiments; it is also possible to: that is, some or all of the steps in the above method embodiments are performed by integrated logic circuits of hardware in the processing element in combination with instructions; of course, the method provided by the above method embodiment can also be executed in combination with the first manner and the second manner.

The processing element may be a general-purpose processor, such as a Central Processing Unit (CPU), or one or more integrated circuits configured to implement the above methods, as described above, for example: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. The storage element may be a memory or a combination of a plurality of storage elements.

Fig. 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: the transceiver 263 is configured to receive a beacon frame sent by a network device on a wireless channel of a wireless local area network, where the beacon frame includes indication information, and the indication information is used to indicate a communication process in which the network device and the communication apparatus communicate in a back reflection manner on the wireless channel of the wireless local area network; performing the communication procedure with the network device over the wireless channel. Further, a memory 261 is included for storing computer programs or instructions for invoking which the processor 262 is configured.

The communication device of the embodiment shown in fig. 26 may be used to implement the technical solutions of the above method embodiments, and further reference may be made to the relevant descriptions in the method embodiments for implementing the principles and technical effects. Here, the communication device may be a physical network device, or may be a component (e.g., a chip or a circuit) of the physical network device.

In fig. 26, the transceiver 263 may be connected to an antenna. In the downlink direction, the transceiver 263 receives information transmitted from the base station via the antenna and transmits the information to the processor 262 for processing. In the uplink direction, the processor 262 processes data of the internet of things device and sends the processed data to the base station through the transceiver 263.

Optionally, the transceiver 263 may be configured to implement corresponding functions in a transceiver module of the internet of things device according to the foregoing embodiment. Or, part or all of the above modules may also be implemented by being embedded on a certain chip of the internet of things device in the form of an integrated circuit. And they may be implemented separately or integrated together. That is, the above modules may be configured as one or more integrated circuits implementing the above methods, for example: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc.

Embodiments of the present application further provide a computer-readable storage medium, in which a computer program is stored, and when the computer program runs on a computer, the computer is caused to execute the communication method described in the above embodiments.

In addition, the present application also provides a computer program product, which includes a computer program that, when running on a computer, causes the computer to execute the communication method described in the above embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 procedures or functions described in accordance with the present application are generated, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid state disk), among others.

Claims

1. A method of communication, comprising:

the method comprises the steps that a network device sends a beacon frame on a wireless channel of a wireless local area network, wherein the beacon frame comprises indication information, and the indication information is used for indicating a communication process that the network device and an Internet of things device within the coverage range of the network device communicate on the wireless channel of the wireless local area network in a back reflection mode;

the network device and the Internet of things device perform the communication process on the wireless channel.

2. The method of claim 1, wherein the network device transmits the beacon frame on a wireless channel of the wireless local area network, and wherein the method further comprises:

the network equipment controls the radio frequency signal source to send radio frequency signals, and the radio frequency signals are used for charging the Internet of things equipment.

3. The method of claim 1, wherein the network device transmits the beacon frame on a wireless channel of the wireless local area network, and wherein the method further comprises:

the network equipment adopts a wireless local area network communication mode to send leading information to a terminal in a coverage area of the network equipment, and the leading information comprises time required for occupying a wireless channel when the network equipment and the Internet of things equipment adopt a back reflection mode to communicate.

4. A method according to any of claims 1-3, wherein the communication procedure is a scheduled access procedure;

the network device and the internet of things device perform the communication process on the wireless channel, and the communication process includes:

the network device sends a scheduling frame to at least one first internet of things device on the wireless channel, wherein the scheduling frame comprises identification information of the at least one first internet of things device, and the first internet of things device is an internet of things device which is registered in the network device;

and the network equipment receives first data sent by the at least one first Internet of things equipment in the back reflection mode on the wireless channel.

5. A method according to any of claims 1-3, wherein the communication procedure is a random access procedure;

the network device receives a registration request frame sent by at least one second networking device in the back reflection mode on the wireless channel, wherein the registration request frame at least comprises identification information of the second networking device, and the second networking device is an Internet of things device which is not registered in the network device.

6. The method of claim 5, wherein after the network device receives the registration request frame sent by at least one second networked device over the wireless channel, the method further comprises:

the network device transmitting a registration response frame to the at least one second networked device over the wireless channel;

and the network equipment receives second data sent by the at least one second networking equipment in the back reflection mode on the wireless channel.

7. The method of claim 5, wherein the registration request frame further comprises second data reported by the second networked device to the network device.

8. The method of any of claims 2-7, wherein the network device comprises a radio frequency signal source.

9. The method according to any one of claims 2-7, wherein the network device controls the rf signal source to transmit the rf signal, comprising:

and the network equipment sends triggering information to the radio frequency signal source, wherein the triggering information is used for triggering the radio frequency signal source to send the radio frequency signal.

10. A method of communication, comprising:

the method comprises the steps that a first Internet of things device receives a beacon frame sent by a network device on a wireless channel of a wireless local area network, wherein the beacon frame comprises indication information, and the indication information is used for indicating a communication process that the network device and the first Internet of things device communicate on the wireless channel of the wireless local area network in a back reflection mode;

the first internet of things device and the network device perform the communication process on the wireless channel.

11. The method of claim 10, wherein before the first internet of things device receives a beacon frame transmitted by a network device on a wireless channel of a wireless local area network, the method further comprises:

the first Internet of things equipment receives a radio frequency signal sent by a radio frequency signal source, and the radio frequency signal is used for charging the first Internet of things equipment.

12. The method according to claim 10 or 11, wherein the communication procedure is a scheduled access procedure;

the first internet of things device and the network device perform the communication process on the wireless channel, including:

the first internet of things device receives a scheduling frame sent by the network device on the wireless channel, wherein the scheduling frame comprises identification information of the first internet of things device, and the first internet of things device is an internet of things device which is registered in the network device;

and the first Internet of things equipment sends first data to the network equipment on the wireless channel in the back reflection mode.

13. A method of communication, comprising:

the second networking equipment receives a beacon frame sent by the network equipment on a wireless channel of a wireless local area network, wherein the beacon frame comprises indication information, and the indication information is used for indicating a communication process that the network equipment and the second networking equipment communicate in a back reflection mode on the wireless channel of the wireless local area network;

the second networking device and the network device conduct the communication process on the wireless channel.

14. The method of claim 13, wherein the second networked device receives the beacon frame transmitted by the network device on a wireless channel of the wireless local area network, and wherein the method further comprises:

and the second networking equipment receives a radio frequency signal sent by a radio frequency signal source, and the radio frequency signal is used for charging the second networking equipment.

15. The method according to claim 13 or 14, wherein the communication procedure is a random access procedure;

the second networking device and the network device perform the communication process on the wireless channel, and the communication process comprises the following steps:

the second networking equipment sends a registration request frame to the network equipment in the wireless channel in the back reflection mode, wherein the registration request frame at least comprises identification information of the second networking equipment, and the second networking equipment is the networking equipment which is not registered in the network equipment.

16. The method according to claim 15, wherein after the second networked device sends a registration request frame to the network device in the back-reflection manner over the wireless channel, the method further comprises:

the second networking equipment receives a registration response frame sent by the networking equipment on the wireless channel;

and the second networking equipment transmits second data to the networking equipment on the wireless channel in the back reflection mode.

17. The method of claim 15, wherein the registration request frame further comprises second data reported by the second networked device to the network device.

18. A communications device comprising means for performing the method of any of claims 1-17.

19. A communication device comprising a processor and a transceiver, the processor and the transceiver communicating with each other through an internal connection; the processor is configured to perform the processing steps of any of the methods of claims 1-16, and the transceiver is configured to perform the transceiving steps of any of the methods of claims 1-17.

20. A computer-readable storage medium storing a computer program comprising instructions for performing the method of any of claims 1-17.

21. A computer program, characterized in that the computer program comprises instructions for the method of any of claims 1-17.