Wireless communication method, device, chip, storage medium, and program product

Abstract

The present application provides a wireless communication method, a device, a chip, a storage medium, and a program product. The method comprises: a network device transmits first information, the first information being used for scheduling the transmission of an energy supply signal and / or a carrier signal, the energy supply signal being used for acquiring radio frequency energy for a terminal device, and the carrier signal being used for the terminal device to perform backscatter communication.

Description

Wireless communication method and device, chip, storage medium, program product TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of mobile communication, in particular to a wireless communication method and device, chip, storage medium, program product. BACKGROUND

[0002] Ambient Internet of Things (A-IoT) communication adopts energy harvesting and backscatter communication technology. The so-called A-IoT device refers to an IoT device that uses various environmental energies such as wireless radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, and other environmental energies to drive itself. Such a device can have no energy storage capability, or can have very limited energy storage capability (such as using a capacitor with a capacity of tens of microfarads (uF)).

[0003] A-IoT supports many industrial applications, such as automated warehousing, smart home, smart agriculture, finding personal items, etc.

[0004] SUMMARY

[0005] Embodiments of the present application provide a wireless communication method and device, chip, storage medium, program product.

[0006] The wireless communication method provided by the embodiments of the present application comprises:

[0007] The network device sends first information, the first information is used for scheduling transmission of energy supply signals and / or carrier signals; the energy supply signals are used for radio frequency energy harvesting for terminal devices, and the carrier signals are used for backscatter communication of terminal devices.

[0008] The wireless communication method provided by the embodiments of the present application comprises:

[0009] The first node receives first information, the first information is used for scheduling transmission of energy supply signals and / or carrier signals; the energy supply signals are used for radio frequency energy harvesting for terminal devices, and the carrier signals are used for backscatter communication of terminal devices.

[0010] The network device provided by the embodiments of the present application comprises:

[0011] The first communication unit is configured to send first information, the first information is used for scheduling transmission of energy supply signals and / or carrier signals; the energy supply signals are used for radio frequency energy harvesting for terminal devices, and the carrier signals are used for backscatter communication of terminal devices.

[0012] The first node provided by the embodiments of the present application comprises:

[0013] The second communication unit is configured to receive first information, the first information being used to schedule transmission of an energizing signal and / or a carrier signal, the energizing signal being used for radio frequency energy harvesting of the terminal device, and the carrier signal being used for backscattering communication of the terminal device.

[0014] The communication device provided by the embodiments of the present application can be the first device in the above scheme or the second device in the above scheme, and the communication device comprises a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke and run the computer program stored in the memory to execute the wireless communication method.

[0015] The chip provided by the embodiments of the present application is configured to implement the wireless communication method.

[0016] Specifically, the chip comprises a processor configured to invoke and run a computer program from a memory, so that a device installed with the chip executes the wireless communication method.

[0017] The computer readable storage medium provided by the embodiments of the present application is configured to store a computer program, and the computer program causes a computer to execute the wireless communication method.

[0018] The computer program product provided by the embodiments of the present application comprises computer program instructions, and the computer program instructions cause a computer to execute the wireless communication method.

[0019] The computer program provided by the embodiments of the present application, when running on a computer, causes the computer to execute the wireless communication method.

[0020] Through the above technical solution, the network device sends first information to the first node to schedule the first node to transmit the energizing signal and / or the carrier signal. In the case that the network device does not provide the energizing signal and / or the carrier signal, i.e., there is an energizing node and / or a carrier node independent of the network device to provide the energizing signal and / or the carrier signal, the energizing and the carrier of the AMP communication are coordinated, so that the carrier signal and / or the energizing signal are flexibly scheduled, unnecessary signal overhead and interference are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application, and the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0022] FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application;

[0023] FIGS. 2 to 6 are schematic diagrams of different frame formats of a PPDU provided by the embodiments of the present application;

[0024] FIG. 7 is an optional system diagram of a wireless communication method according to an embodiment of the present application;

[0025] FIG. 8 is an optional structure diagram of an A-IoT communication system according to an embodiment of the present application;

[0026] FIG. 9 is an optional diagram of radio frequency energy harvesting according to an embodiment of the present application;

[0027] FIG. 10 is an optional diagram of backscatter communication according to an embodiment of the present application;

[0028] FIG. 11 is an optional circuit diagram of resistance load modulation according to an embodiment of the present application;

[0029] FIG. 12 is an optional frame format diagram of a PPDU according to an embodiment of the present application;

[0030] FIG. 13 is an optional flow diagram of a wireless communication method according to an embodiment of the present application;

[0031] FIG. 14 is an optional flow diagram of a wireless communication method according to an embodiment of the present application;

[0032] FIG. 15 is an optional frame format diagram of a PPDU according to an embodiment of the present application;

[0033] FIG. 16 is an optional frame format diagram of a preamble according to an embodiment of the present application;

[0034] FIG. 17 is an optional flow diagram of a wireless communication method according to an embodiment of the present application;

[0035] FIG. 18 is an optional flow diagram of a wireless communication method according to an embodiment of the present application;

[0036] FIG. 19 is an optional frame format diagram of a PPDU according to an embodiment of the present application;

[0037] FIG. 20 is an optional flow diagram of a wireless communication method according to an embodiment of the present application;

[0038] FIG. 21A-FIG. 21H are optional flow diagrams of a wireless communication method according to an embodiment of the present application;

[0039] FIG. 22A-FIG. 22F are optional flow diagrams of a wireless communication method according to an embodiment of the present application;

[0040] FIG. 23A-FIG. 23E are optional flow diagrams of a wireless communication method according to an embodiment of the present application;

[0041] FIG. 24 is an optional structure diagram of a network device according to an embodiment of the present application;

[0042] FIG. 25 is a schematic structural diagram of a first node according to an embodiment of the present application;

[0043] FIG. 26 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0044] FIG. 27 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0045] FIG. 28 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0047] The communication system scenario includes a terrestrial network (TN) and an NTN. The NTN generally provides communication services to ground users in the form of satellite communication. The NTN system currently includes an NR-NTN and an IoT-NTN system, and may further include other NTN systems in the future.

[0048] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application. As shown in FIG. 1, the communication system 100 can include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 through an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0049] It should be understood that the embodiments of the present application are only exemplarily described with respect to the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as a Long Term Evolution (LTE) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunication System (UMTS), an Internet of Things (IoT) system, a Narrow Band Internet of Things (NB-IoT) system, an enhanced Machine-Type Communications (eMTC) system, a 5G communication system (also referred to as a New Radio (NR) communication system), a WiFi wireless local area network, or a future communication system, etc.

[0050] In the communication system 100 shown in FIG. 1, the network device 120 can be an access network device that communicates with the terminal device 110. The access network device can provide communication coverage for a specific geographic area and can communicate with the terminal device 110 (e.g., a UE) located in the coverage area.

[0051] The network device 120 can be an Evolutional Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), an Access Point (AP) in a WiFi system, a wireless router, etc.

[0052] The terminal device 110 can be any terminal device, including but not limited to a terminal device that uses a wired or wireless connection with the network device 120 or other terminal devices.

[0053] For example, the terminal device 110 can refer to an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handset, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved network, and the like, an Access Point (AP) STA with communication function.

[0054] The terminal device 110 can be used for Device to Device (D2D) communication.

[0055] The wireless communication system 100 can further include a core network device 130 in communication with the base station, which can be a 5G core network (5GC) device, for example, an Access and Mobility Management Function (AMF), for another example, an Authentication Server Function (AUSF), for another example, a User Plane Function (UPF), for another example, a Session Management Function (SMF). Alternatively, the core network device 130 can also be an Evolved Packet Core (EPC) device of an LTE network, for example, a Session Management Function + Core Packet Gateway (SMF + PGW-C) device. It should be understood that the SMF + PGW-C can simultaneously implement the functions that can be implemented by the SMF and the PGW-C. In the process of network evolution, the above-mentioned core network device can also be called other names, or new network entities can be formed by dividing the functions of the core network, which is not limited by the embodiments of the present application.

[0056] The various functional units in the communication system 100 can also establish a connection for communication through a next generation (NG) interface.

[0057] For example, the terminal device establishes an air interface connection with the access network device through the Uu interface, which is used to transmit user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (N1 for short); the access network device, for example, a next generation wireless access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (N3 for short); the access network device can establish a control plane signaling connection with the AMF through the NG interface 2 (N2 for short); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (N4 for short); the UPF can interact with the data network to transmit user plane data through the NG interface 6 (N6 for short); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (N11 for short); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (N7 for short).

[0058] FIG. 1 exemplarily shows one base station, one core network device and two terminal devices. Optionally, the wireless communication system 100 can include multiple base station devices and each base station can include other numbers of terminal devices within its coverage range, which is not limited in the embodiments of the present application.

[0059] It should be noted that FIG. 1 only shows a system to which the embodiments of the present application are applied in the form of an example, and of course, the method shown in the embodiments of the present application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably herein. The term "and / or" herein is only used to describe the associated objects, which means that there can be three relationships, for example, A and / or B, which means that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " generally represents an "or" relationship between the front and rear associated objects. It should also be understood that the "indication" mentioned in the embodiments of the present application can be direct indication or indirect indication, and can also mean an associated relationship. For example, A indicates B, which means that B can be obtained by A; or A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or A and B have an associated relationship. It should also be understood that the "corresponding" mentioned in the embodiments of the present application can mean a direct correspondence or an indirect correspondence between the two, or can mean an associated relationship between the two, or can mean an indication and being indicated, configuration and being configured, and the like. It should also be understood that the "predefined" or "predefined rule" mentioned in the embodiments of the present application can be realized by pre-saving the corresponding code, table or other means for indicating related information in the device (for example, including terminal device and network device), and the specific implementation manner of the present application is not limited. For example, the predefinition can mean the definition in the protocol. It should also be understood that the "protocol" in the embodiments of the present application can mean a standard protocol in the communication field, for example, it can include the LTE protocol, the NR protocol and the related protocol applied to the future communication system, and the present application is not limited thereto.

[0060] In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be combined with the technical solutions of the embodiments of the present application in any way, and all belong to the protection scope of the embodiments of the present application.

[0061] WiFi communication systems have developed a variety of different versions (such as: 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, etc.) to meet different application scenarios, data rates, propagation distances / coverage, etc. From the physical layer protocol, the physical layer protocol data unit (PPDU) structure (physical layer frame structure) is one of the design focuses, which needs to ensure the interoperability between different devices.

[0062] FIGS. 2-5 are several different PPDU frame structures.

[0063] In 802.11a, as shown in FIG. 2, a Non High-throughput (Non-HT) PPDU includes a Short Training Field (STF), a Long Training Field (LTF), a Signal (SIG) field and Data. The SIG field includes the following fields: rate, length and tail, wherein the rate field indicates the rate of data transmission, i.e. the data transmission speed supported by the modulation and coding scheme; the length field provides the length of the data packet; and the tail field can contain some additional information, such as checksum or error detection code, etc. The STF, LTF and SIG shown in FIG. 2 are also basically used in the PPDU frame structure of subsequent other versions.

[0064] As shown in FIG. 3, 802.11n introduces HT, and adds an HT-SIG field on the basis of the legacy preamble of 802.11a, i.e. the preamble containing STF, LTF and SIG in FIG. 2. This field uses Quadrature (Q) Binary Phase Shift Keying (BPSK) (Q-BPSK) modulation, which can enable a station (STA) device to distinguish whether the PPDU is of HT or non-HT type. In FIG. 3, the legacy L-STF, L-LTF and L-SIG can be understood as the STF, LTF and SIG in FIG. 2.

[0065] As shown in FIG. 4, 802.11ac is also in a similar manner, and adds a new Very High-throughput (VHT)-SIG field after the legacy preamble of 802.11a. In order to distinguish from the PPDU of 802.11a shown in FIG. 2 and the PPDU of 802.11n shown in FIG. 3, this newly introduced VHT-SIG field includes two 4us symbols, and uses BPSK and Q-BPSK for modulation respectively.

[0066] 802.11ba designs a low power wake up receiver (LP-WUR) for energy saving users, and the PPDU frame structure is shown in FIG. 5, which includes a non-WUR wideband part and a WUR narrowband part. The non-WUR part also includes L-SFT, L-LTF, L-SIG, and two BPSK-marks for distinguishing versions (it is a wideband signal and uses OFDM modulation). The non-WUR part is to let other receiving devices that are not WUR detect and identify the WUR PPDU, avoid transmitting in this PPDU, and thus reduce interference. The WUR part uses a narrowband signal (4 MHz) and multi-carrier on-off keying modulation (MC-OOK), and contains a WUR-synchronization (Sync) part for WUR receivers to detect the PPDU, timing, and determine the rate of the data part (LDR and HDR), so as to read the subsequent data part. It should be noted that the WUR part does not have a special SIG field to indicate the length of the data (length info is encoded in MPDU, from the MAC layer), which requires the receiver to do some cross-layer cooperation, that is, the physical layer needs to upload a part of the data to the MAC layer first to determine the length of the data field. This design increases the complexity of the receiver, but can also alleviate the demand for the SIG field of the WUR PPDU.

[0067] Ambient power enabled IoT (Ambient IoT) is a kind of IoT in which A-IoT devices are weak in capability and cannot perform carrier sensing and send traditional preambles to seize the channel, so AP or reader is usually needed to operate on behalf of the A-IoT devices, that is, the AP first acquires the channel through carrier sensing, then sends a legacy preamble to seize the channel, and then schedules the A-IoT device to send Ambient power (AMP) uplink data (UL data). A possible structure of a PPDU sent by the AP is shown in FIG. 6, which includes a preamble, an AMP synchronization, an AMP signaling (AMP-SIG) (optionally), and AMP downlink data (DL data). The preamble includes an L-STF, an L-LTF, an L-SIG, a field 1 (field1), a field 2 (field2), and a new signaling (new SIG). The AMP SIG and / or the AMP DL data can be used to schedule the A-IoT device to send the AMP UL data. The naming of the field1 and the field2 and the information carried thereby can be set according to actual needs.

[0068] In addition to the AP and the A-IoT device, as shown in FIG. 7, a wireless power transfer (WPT) node and / or a carrier wave node (CWN) can also be deployed in the system. The WPT node sends a wireless power signal to provide energy for the A-IoT device (for a radio frequency energy harvesting type), and the CWN sends a carrier signal so that the A-IoT device modulates the received carrier signal to implement backscatter communication.

[0069] Ambient power enabled IoT

[0070] Ambient power enabled IoT communication adopts energy harvesting and backscatter communication technology. As shown in FIG. 8, an Ambient power enabled IoT communication network is composed of a network device 201 and an A-IoT device 202. The network device 201 is configured to send a wireless power signal and a downlink communication signal 203 to the A-IoT device 202 and receive a backscatter signal 204 of the A-IoT device. A basic A-IoT device 202 includes an energy harvesting module 2011, a backscatter communication module 2022, and a low-power computing module 2023. In addition, the A-IoT device 202 can also have a memory or a sensor 2024 for storing some basic information (such as an article identifier) or obtaining environmental temperature, environmental humidity, and other sensing data.

[0071] The key technologies of the ambient energy IOT include RF energy harvesting and backscattering communication.

[0072] RF Power Harvesting

[0073] As shown in FIG. 9, the RF energy harvesting module realizes the collection of the space electromagnetic wave energy based on the electromagnetic induction principle, and then obtains the energy required to drive the A-IoT device to work, such as for driving low-power demodulation and modulation modules, sensors, and memory reading, etc. Therefore, the A-IoT device does not need a traditional battery. The structure of the energy harvesting module is shown in FIG. 9, which includes a diode 301, a capacitor 302 and a resistor 303, thereby collecting the energy of the space radio frequency (RF). Optionally, the capacitor 302 is connected to one end of the diode 301 as the positive electrode.

[0074] Back Scattering

[0075] The working principle of the backscattering communication is shown in FIG. 10. The A-IoT device 401 receives the carrier 403 sent by the backscattering reader 402, collects energy through the RF energy harvesting module 4011, and then functions to the low-power computing module 4012 (also referred to as a logic module), and modulates the received carrier 403 to load the information to be sent, and radiates the modulated signal as a backscattering signal 404 from the antenna, which is called backscattering communication. Among them, the transmitter (TX) of the backscattering reader 402 and the amplifier (AMP) are connected, and the receiver (RX) of the backscattering reader 402 and the low noise amplifier (LNA) are connected.

[0076] The backscattering and load modulation functions are closely related. The load modulation adjusts and controls the circuit parameters of the oscillation circuit of the A-IoT device according to the beat of the data stream, so that the size of the electronic tag impedance and other parameters change, thereby completing the modulation process.

[0077] The load modulation technology includes resistance load modulation and capacitance load modulation. In the resistance load modulation, as shown in FIG. 11, the load R LIn parallel with a resistor R3, the resistor R3 can be called a load modulation resistor, the resistor R3 is turned on or off based on the control of the binary data stream, as shown in FIG. 11, the A-IoT device further comprises: a resistor R2, an inductor L1, an inductor L2, and a capacitor C2. The on-off of the resistor R3 will cause the change of the circuit voltage, so as to realize amplitude shift keying modulation (ASK), that is, the modulation and transmission of the signal are realized by adjusting the amplitude of the backscatter signal of the A-IoT device. Similarly, in the capacitor load modulation, the on-off of the capacitor can realize the change of the circuit resonance frequency, realize frequency shift keying modulation (FSK), that is, the modulation and transmission of the signal are realized by adjusting the working frequency of the backscatter signal of the A-IoT device.

[0078] It can be seen that the A-IoT device modulates the incoming signal by means of load modulation, thereby realizing the backscatter communication process. Therefore, the A-IoT device has the following advantages:

[0079] 1) The A-IoT device does not actively transmit signals, so it does not need a complex radio frequency link such as a PA, a radio frequency filter, etc.

[0080] 2) The A-IoT device does not need to actively generate high-frequency signals, so it does not need a high-frequency crystal oscillator.

[0081] 3) With backscatter communication, the transmission of the signal of the A-IoT device does not consume the energy of the A-IoT device itself.

[0082] Application scenarios of environmental energy Internet of Things

[0083] Due to the significant advantages of environmental energy Internet of Things, such as extremely low cost, zero power consumption, and small size, it can be widely applied in various industries, such as logistics for vertical industries, intelligent warehousing, smart agriculture, energy and power, industrial Internet, etc. It can also be applied to personal applications such as smart wearables and smart homes.

[0084] Classification of A-IoT devices

[0085] Based on the energy storage capacity and whether the A-IoT device terminal has the ability to generate RF signals for signal transmission, the A-IoT device terminal is divided into the following types.

[0086] 1) Passive A-IoT device

[0087] A-IoT device does not need to install a battery, when A-IoT device is close to network device (such as RFID system reader), A-IoT device is in the near field range formed by the network device antenna radiation. Therefore, A-IoT device antenna generates induced current through electromagnetic induction, and the induced current drives the low-power chip circuit of A-IoT device. Realize the demodulation of forward link signal (downlink, link from network device to A-IoT device), and signal modulation of backward link (uplink, link from A-IoT device to network device) and other work. For backscatter link, A-IoT device uses backscatter implementation to transmit signals.

[0088] As can be seen, passive A-IoT device does not need to install a battery to drive, whether it is a forward link or a reverse link, is a truly passive A-IoT device.

[0089] Passive A-IoT device does not need a battery, and the radio frequency circuit and the baseband circuit are very simple, for example, it does not need LNA (low noise amplifier), PA (power amplifier), crystal oscillator, ADC and other periods, so it has many advantages such as small size, light weight, very cheap price, long service life and so on.

[0090] 2), semi-passive A-IoT device

[0091] Semi-passive A-IoT device itself does not install a conventional battery, but can use RF energy harvesting module to collect radio wave energy, or use solar energy / light energy / thermal energy / kinetic energy harvesting module to collect energy, and store the collected energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, it can drive the low-power chip circuit of A-IoT device. Realize the demodulation of forward link signal, and signal modulation of backward link and other work. For backscatter link, A-IoT device uses backscatter implementation to transmit signals.

[0092] As can be seen, semi-passive A-IoT device does not need to install a battery to drive, whether it is a forward link or a reverse link, although it uses energy stored in the capacitor in work, but the energy comes from the radio energy collected by the energy harvesting module, so it is also a truly passive A-IoT device.

[0093] Semi-passive A-IoT device inherits many advantages of passive A-IoT device, so it has many advantages such as small size, light weight, very cheap price, long service life and so on.

[0094] 3), active A-IoT device

[0095] Some A-IoT devices used in some scenarios can also be active A-IoT devices, which can be internally provided with a battery (a conventional battery, such as a dry battery, a rechargeable lithium battery, or the like). The battery is used to drive the low-power chip circuit of the A-IoT device. The battery is used to drive the low-power chip circuit of the A-IoT device. The work of demodulating the forward link signal and modulating the backward link signal is implemented. However, for the backscatter link, the A-IoT device uses a backscatter implementation mode to transmit signals. Therefore, the zero power consumption of this terminal mainly reflects that the signal transmission of the reverse link does not require the power of the terminal itself, but uses the backscatter mode. Although the active A-IoT device uses a battery, due to the use of a super low-power communication technology, the power consumption is very low, and therefore the working life of the battery can be greatly improved compared with the prior art.

[0096] The active A-IoT device is internally provided with a battery to supply power to the RFID chip to increase the read-write distance of the tag and improve the reliability of communication. Therefore, in some scenarios with relatively high requirements on communication distance, read latency, and the like, the active A-IoT device can be applied.

[0097] Classification of A-IoT devices based on transmitter types.

[0098] The business types of the environmental energy Internet of Things will also be mainly based on the business types of other Internet of Things. Therefore, according to the data transmission mode of the A-IoT device, the following types can be divided:

[0099] 1) A-IoT device based on backscatter

[0100] This type of A-IoT device uses the backscatter mode to transmit uplink data as described above. This type of device does not have an active transmitter for active transmission, but only has a backscatter transmitter. Therefore, when the terminal transmits data, the network device needs to provide a carrier, and the terminal device performs backscatter based on the carrier to realize data transmission.

[0101] 2) A-IoT device based on active transmitter

[0102] This type of A-IoT device uses an active transmitter with active transmission capability to transmit uplink data, so that this type of A-IoT device can transmit data using its own active transmitter when transmitting data, without the need for the network device to provide a carrier. The active transmitter suitable for the A-IoT device can be, for example, an ultra-low-power ASK transmitter, an ultra-low-power FSK transmitter, and the like. Based on the current implementation, the overall power consumption of this type of transmitter can be reduced to 400-600 uw when transmitting a 100 uw signal.

[0103] 3) A-IoT device with both backscatter and active transmitter

[0104] Such terminals can support both backscattering and active transmitters. The terminals can determine which type of uplink signal transmission to use, backscattering or active transmitter, based on different situations (e.g., power situation, available ambient energy) or based on scheduling by network equipment.

[0105] Cellular passive IoT

[0106] Cellular IoT is booming, such as the IoT technologies that have been standardized, such as NB-IoT, MTC, RedCap, etc., but there are still many IoT communication needs in scenarios that cannot be met, for example:

[0107] - Strict communication environment

[0108] Some IoT scenarios may face extreme environments such as high temperature, extremely low temperature, high humidity, high pressure, high radiation, or high-speed motion. For example, ultra-high voltage substations, high-speed train track monitoring, high-cold environment monitoring, industrial production lines, etc. In these scenarios, due to the working environment limitations of conventional power supplies, existing IoT terminals will not be able to work. In addition, extreme working environments are also not conducive to the maintenance of IoT, such as replacing batteries.

[0109] - Extremely small terminal form factor requirements

[0110] Some IoT communication scenarios, such as food traceability, commodity circulation, and smart wearables, require terminals to have extremely small sizes to facilitate their use in these scenarios. For example, IoT terminals for commodity management in the circulation link are usually in the form of electronic tags, which are embedded in commodity packaging in a very small form. For another example, lightweight wearable devices can meet user needs while improving user experience.

[0111] - Extremely low-cost IoT communication needs

[0112] Many IoT communication scenarios require IoT terminals to be low-cost enough to enhance their competitiveness over other alternative technologies. For example, in logistics or warehousing scenarios, in order to facilitate the management of a large number of circulating goods, IoT terminals can be attached to each item, thereby completing the precise management of the entire logistics process and cycle through communication between the terminal and the logistics network. These scenarios require IoT terminals to be competitively priced.

[0113] Therefore, in order to cover these unmet IoT communication needs, ultra-low-cost, extremely small, battery-free / maintenance-free IoT terminals are needed in cellular networks, and ambient energy IoT can meet this demand.

[0114] In the process of standardization, Ambient IoT can also be called zero-power IoT or passive IoT. Ambient IoT device means an IoT device that is driven by various ambient energies, such as wireless radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, and the like. Such a device can have no energy storage capability or can have very limited energy storage capability (such as using a capacitor with a capacity of tens of uF). Compared with existing IoT devices, Ambient IoT devices have many advantages such as no conventional battery, no maintenance, small size, low complexity, low cost, and long service life.

[0115] Ambient IoT can be used in at least four types of scenarios:

[0116] Object recognition, such as logistics, production line product management, and supply chain management;

[0117] Environmental monitoring, such as temperature, humidity, and harmful gas monitoring of working environment and natural environment;

[0118] Positioning, such as indoor positioning, intelligent search, and production line article positioning;

[0119] Intelligent control, such as intelligent control of various appliances in smart home (turning on / off air conditioner, adjusting temperature) and intelligent control of various facilities in agricultural greenhouse (automatic irrigation, fertilization).

[0120] As described above, the A-IoT system needs to consider not only the communication between the AP and the A-IoT device, but also the energy supply node and the carrier node. When the AP, the energy supply node, and the carrier node are dispersed in different devices, how to coordinate the AMP communication and the energy supply and carrier so as to ensure the communication is a problem. Continuous transmission of energy supply signals and carrier signals will cause the wireless channel to be occupied for a long time, affecting other communications and increasing the power consumption of the device. Therefore, on-demand or according to the AP scheduling mode needs to be considered.

[0121] In the related art, several possible PPDU designs are shown in FIG. 12:

[0122] PPDU format 1 shown in 12a in FIG. 12: contains Wifi-preamble and energizer symbols, used for charging only

[0123] PPDU format 2 shown in 12b in FIG. 12: contains Wifi-preamble, AMP Sync, and control signaling part, used for issuing control signaling to A-IoT devices without feedback

[0124] PPDU format 3 shown in 12c in FIG. 12: containing Wifi-preamble, AMP Sync, control signaling part and energizer part, for issuing control signaling to A-IoT device and requiring it to feedback immediately in energizer part.

[0125] In which, the AP sends energizer symbols, i.e. the AP has the function of energizing.

[0126] For the convenience of understanding the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, which all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0127] FIG. 13 shows a wireless communication method provided by an embodiment of the present application, which can include the following steps:

[0128] S1301, the network device sends first information, and correspondingly, the first node receives the first information; wherein the first information is used for scheduling the transmission of energizing signals and / or carrier signals; the energizing signals are used for radio frequency energy harvesting for the terminal device, and the carrier signals are used for the terminal device to perform backscatter communication. In the embodiments of the present application, the first node can be a node independent of the network device and the terminal device. The network device can be an AP or a reader (interrogator), and the terminal device can be a station or an A-IoT device. The first node has the function of sending energizing signals and / or carrier signals to the terminal device. The energizing signal can be understood as a wireless power signal or an energizer symbol, which can provide energy for the terminal device. After the carrier signal is sent to the terminal device, the terminal device can modulate the received carrier signal to realize backscatter communication. Among them, the signal transmitted by the terminal device in the backscatter communication can be called backscatter signal, and the backscatter signal is used to send uplink transmission to the network device.

[0129] The network device broadcasts the first information, and the first node receives the first information and sends the energizing signals and / or carrier signals based on the received first information.

[0130] In some embodiments, the energizing signal sent by the first node can include a preamble (optional) and an energizing part, wherein the energizing part provides energy for the terminal device as the actual energizing signal part.

[0131] In some embodiments, the carrier signal sent by the first node can include a preamble (optional) and a carrier part, wherein the carrier part is modulated by the terminal device as the actual carrier signal part.

[0132] In the embodiments of the present application, the terminal device receives the energy supply signal and / or the carrier signal, the terminal device performs radio frequency energy collection, i.e., wireless charging, based on the received energy supply signal to obtain energy, and / or the terminal device modulates the received carrier signal to perform backscattering communication.

[0133] It can be understood that the terminal device in the coverage of the first node receives the energy supply signal and / or the carrier signal.

[0134] In the embodiments of the present application, the coverage of the network device can include one or more first nodes, and all or part of the one or more first nodes in the coverage of the network device transmit the energy supply signal and / or the carrier signal based on the first information.

[0135] In the embodiments of the present application, the network device transmits the first information to the first node to schedule the first node to transmit the energy supply signal and / or the carrier signal, in the case that the network device does not provide the energy supply signal and / or the carrier signal, i.e., the energy supply node and / or the carrier node independent of the network device provides the energy supply signal and / or the carrier signal, the energy supply and the carrier of the AMP communication are coordinated, so that the carrier signal and / or the energy supply signal are flexibly scheduled, unnecessary signal overhead and interference are avoided.

[0136] In some embodiments, the first node includes a first device and / or a second device, the first device is configured to transmit the energy supply signal, and the second device is configured to transmit the carrier signal.

[0137] In an example, the first node is the first device, i.e., the WPT or the energy supply node, and correspondingly, the first information is used to schedule the transmission of the energy supply signal, at this time, the terminal device obtains energy and does not need to perform backscattering communication, or the CWN used to transmit the carrier signal is integrated in one device with the network device, i.e., the network device integrates the function of transmitting the carrier signal.

[0138] In an example, the first node is the second device, i.e., the CWN or the carrier node, and correspondingly, the first information is used to schedule the transmission of the carrier signal, at this time, the terminal device transmits the backscattering signal to the network device, or the WPT used to transmit the energy supply signal is integrated in one device with the network device, i.e., the network device integrates the function of transmitting the energy supply signal.

[0139] In an example, the first node includes the first device and the second device, i.e., the first node integrates the functions of transmitting the energy supply signal and transmitting the carrier signal, and correspondingly, the first information is used to schedule the transmission of the energy supply signal and / or the carrier signal.

[0140] In some embodiments, the first information comprises first scheduling information and / or second scheduling information, the first scheduling information being used for scheduling transmission of the energizing signal, and the second scheduling information being used for scheduling transmission of the carrier signal.

[0141] The first scheduling information is used for scheduling transmission of the energizing signal by the first device.

[0142] The second scheduling information is used for scheduling transmission of the carrier signal by the second device.

[0143] In an embodiment of the present application, the coverage range of the network device can comprise a plurality of first nodes, and the functions of different first nodes are different, and each first node performs transmission of a signal corresponding to a function based on the received first information.

[0144] In an example, for a first node as a WPT, in a case where the first information comprises first scheduling information, the first node performs transmission of the energizing signal based on the first scheduling information.

[0145] In an example, for a first node as a CWN, in a case where the first information comprises second scheduling information, the first node performs transmission of the carrier signal based on the second scheduling information.

[0146] In an example, for a first node as a WPT and a CWN, in a case where the first information comprises first scheduling information and / or second scheduling information, the first node performs transmission of the energizing signal and / or the carrier signal based on the first scheduling information and / or the second scheduling information.

[0147] The energizing node, the carrier node, and the network device can be integrated in the same device or can be distributed in different devices and communicate through wired or wireless communication. Distribution in different devices can reduce the complexity and cost of a single device, and can also be flexibly deployed in combination with different functions, such as an energizing range of only a few meters and a network device communication range that is farther. In this case, multiple energizing nodes can be deployed in the coverage range of the network device. The wireless communication method provided in an embodiment of the present application can be used in a scenario in which the energizing node, the carrier node, and the network device are distributed in different devices, thereby meeting the coverage requirement of a network device with a large communication range.

[0148] In some embodiments, the first scheduling information and / or the second scheduling information comprises one or more of the following:

[0149] Device information, the device information being used for indicating one or more of the following: a first device and / or a second device, the terminal device, the first device being used for transmitting the energizing signal, and the second device being used for transmitting the carrier signal:

[0150] time information, the time information being used for indicating a transmission time of the energizing signal and / or the carrier signal;

[0151] first indication information, the first indication information being used for indicating enabling or disabling the transmission of the energizing signal and / or the carrier signal.

[0152] It can be understood that the first information comprises one or more of the device information, the time information and the first indication information.

[0153] For the device information, it can be understood as indicating a device for transmitting the energizing signal and / or a device for transmitting the carrier signal, and a terminal device which needs to obtain energy and / or perform backscatter communication.

[0154] In the embodiments of the present application, the device information is optional. In the case that the first information does not comprise the device information, the first device for transmitting the energizing signal and / or the second device for transmitting the carrier signal, and the terminal device which needs to obtain energy and / or perform backscatter communication can be determined according to the information related to the energizing signal and / or the carrier signal in the first information.

[0155] The device information can comprise first identification information to indicate the first device. The first device indicated by the device information can be understood as a specific WPT in the coverage of the network device, i.e., a target WPT, for transmitting the energizing signal. Correspondingly, the first device corresponding to the first identification information transmits the energizing signal, and other first devices in the coverage of the network device do not transmit the energizing signal.

[0156] In an example, the first identification information can be ID information of the WPT.

[0157] It can be understood that in the case that the device information does not comprise the first identification information, if other information related to the energizing signal is included in the first information, it can be considered that all the first devices in the coverage of the network device are scheduled to transmit the energizing signal, and correspondingly, all the first devices in the coverage of the network device transmit the energizing signal; if other information related to the energizing signal is not included in the first information, it can be considered that the first devices are not scheduled to transmit the energizing signal, and correspondingly, the first devices in the coverage of the network device do not transmit the energizing signal.

[0158] The device information can comprise second identification information to indicate the second device. The second device indicated by the device information can be understood as a specific CWN in the coverage of the network device, i.e., a target CWN, for transmitting the carrier signal. Correspondingly, the second device corresponding to the second identification information transmits the carrier signal, and other second devices in the coverage of the network device do not transmit the carrier signal.

[0159] In an example, the second identification information can be ID information of the CWN.

[0160] It can be understood that, in the case that the device information does not include the second identification information, if the first information includes other information related to the carrier signal, it can be considered that all the second devices in the coverage range of the scheduling network device transmit the carrier signal, and correspondingly, all the second devices in the coverage range of the network device transmit the carrier signal; if the first information does not include other information related to the energy supply signal, it can be considered that the second device does not transmit the carrier signal, and correspondingly, the second device in the coverage range of the network device does not transmit the carrier signal.

[0161] The device information can include third identification information to indicate a terminal device, and the terminal device indicated by the device information can be understood as a specific terminal device, i.e., a target terminal device, which needs to receive the energy supply signal and / or the carrier signal. The first device indicated by the first identification information and / or the second device indicated by the second identification information judges whether the target terminal device is located in the coverage range of the target WPT and / or the target CWN based on the third identification information, and in the case that the target terminal device is located in the coverage range of the target WPT and / or the target CWN, the target WPT transmits the energy supply signal and / or the target CWN transmits the carrier signal, so that the target terminal device receives the energy supply signal and / or the carrier signal.

[0162] In an example, the third identification information can be ID information of the terminal device.

[0163] It can be understood that, in the case that the device information does not include the third identification information, the target WPT directly transmits the energy supply signal and / or the target CWN directly transmits the carrier signal, so that the terminal devices in the corresponding coverage range receive the energy supply signal and / or the carrier signal. At this time, it can be considered that the terminal device which needs to obtain energy and / or perform backscatter communication is not a specific terminal device, the terminal device which can receive the energy supply signal can obtain energy, and the terminal device which can receive the carrier signal can perform backscatter communication.

[0164] For the time information, it can be understood as indicating the duration and position of the energy supply signal and / or the carrier signal.

[0165] In an example, the time information can include a rate and a length, which are used to calculate the duration, and the starting position of the energy supply signal and / or the carrier signal is after the preamble of the PPDU in which the first scheduling information and / or the second scheduling information is transmitted.

[0166] In an example, the time information can include the duration and the position.

[0167] In the embodiments of the present application, the time information is optional.

[0168] In an example, the time information in the first information indicates a duration and a position of the one-time energy supply signal, and / or indicates a duration and a position of the one-time carrier signal. At this time, the one-time energy supply signal and / or the one-time carrier signal is scheduled, and the corresponding first information includes the one-time information.

[0169] In an example, the time information in the first information indicates a duration and a position of periodicity of the energy supply signal, and / or indicates a duration and a position of periodicity of the carrier signal. At this time, in the case that the energy supply signal and / or the carrier signal has been scheduled, the time information can not be included in the first information.

[0170] In the embodiments of the present application, the duration of the energy supply signal can be the same as the duration of the carrier signal, or the duration of the energy supply signal is longer than the duration of the carrier signal.

[0171] It can be understood that, in the case that the time information indicates the transmission time of the energy supply signal and the transmission time of the carrier signal, the transmission time of the energy supply signal covers the transmission time of the carrier, i.e., the transmission time of the carrier is within the transmission time of the energy supply signal.

[0172] For the first indication information, it is used to indicate enabling, i.e., starting, or disabling, i.e., stopping, the transmission of the energy supply signal and / or the carrier signal.

[0173] In the embodiments of the present application, in the case that the device information and / or the time information exist, the first indication information can not be included in the first information, at this time, the transmission of the energy supply signal and / or the carrier signal is enabled by default.

[0174] In some embodiments, the first scheduling information and / or the second scheduling information further includes one or more of the following:

[0175] The second indication information is used to indicate the frequency band and / or the frequency point of the energy supply signal and / or the carrier signal.

[0176] The third indication information is used to indicate the waveform of the energy supply signal and / or the carrier signal.

[0177] The power information is used to indicate the transmission power of the energy supply signal and / or the carrier signal.

[0178] The first information can further include one or more of the second indication information, the third indication information and / or the power information.

[0179] For the second indication information, it indicates the frequency band and / or the frequency point of the energy supply signal and / or the carrier signal.

[0180] In an example, the frequency band of the energy supply signal and / or the carrier signal is 900MHz frequency band and / or the frequency point is 2.4GHz.

[0181] In the embodiments of the present application, the frequency band and / or the frequency point of the energy supply signal is the same as or different from the frequency band and / or the frequency point of the carrier signal.

[0182] For the third indication information, one or more of the following information of the energy supply signal and / or the carrier signal is indicated: waveform type information indicating a waveform type, a frequency, a duty cycle, and a pulse width. The waveform type indicated by the waveform type information can include a sine wave, a square wave, etc. In the embodiments of the present application, the waveform type of the energy supply signal and / or the carrier signal is not limited.

[0183] The WPT determines the waveform of the energy supply signal based on the information of the energy supply signal in the third indication information, and the CWN determines the waveform of the carrier signal based on the information of the carrier signal in the third indication information.

[0184] For the power information, the transmission power of the energy supply signal and / or the carrier signal is indicated. It can be understood that the power information is used to indicate the transmission power of the energy supply signal and / or the transmission power of the carrier signal.

[0185] In the embodiments of the present application, in the case that the target WPT and the target terminal device exist, the transmission power of the energy supply signal can be related to the distance between the target WPT and the target terminal device.

[0186] In the embodiments of the present application, in the case that the target CWN and the target terminal device exist, the transmission power of the carrier signal can be related to the distance between the target WPT and the target terminal device.

[0187] In the embodiments of the present application, the power information can be a power value or a power level of the power value.

[0188] It can be understood that the information related to the energy supply signal included in the first information can be understood as the first scheduling information, such as one or more of the following information: the first identification information, the information indicating the transmission time of the energy supply signal in the time information, the information indicating the enabling or disabling of the transmission of the energy supply signal in the first indication information, the information indicating the frequency band and / or frequency point of the energy supply signal in the second indication information, the information indicating the waveform of the energy supply signal in the third indication information, and the information indicating the transmission power of the energy supply signal in the power information. The information related to the carrier signal in the first information can be understood as the second scheduling information, such as one or more of the following information: the second identification information, the information indicating the transmission time of the carrier signal in the time information, the information indicating the enabling or disabling of the transmission of the carrier signal in the first indication information, the information indicating the frequency band and / or frequency point of the carrier signal in the second indication information, the information indicating the waveform of the carrier signal in the third indication information, and the information indicating the transmission power of the carrier signal in the power information. It can be understood that part of the information, such as the terminal device identification information in the device information, can be considered as the first scheduling information and also as the second scheduling information.

[0189] In some embodiments, the first scheduling information and the second scheduling information are the same information or different information.

[0190] The first scheduling information and the second scheduling information being the same information can be understood as scheduling the energy supply signal and the carrier signal together through the same information. For example, the network device considers the energy supply signal and the carrier signal as the same signal, or the WPT and the CWN transmit the energy supply signal and the carrier signal based on the same information.

[0191] In an example, the first information includes one time information, which is used to indicate the transmission time of the energy supply signal and also used to indicate the transmission time of the carrier signal, which can be understood as the transmission time of the energy supply signal and the carrier signal being the same, i.e., the same duration and position.

[0192] The first scheduling information and the second scheduling information being different information can be understood as indicating the transmission of the energy supply signal and the carrier signal respectively through different information. The WPT and the CWN transmit the energy supply signal and the carrier signal based on different information.

[0193] In an example, the first information includes first time information and second time information, the first time information is used to indicate the transmission time of the energy supply signal, and the second time information is used to indicate the transmission time of the carrier signal, which can be understood as the transmission time of the energy supply signal and the carrier signal being independent.

[0194] In some embodiments, the information for scheduling the transmission of the energy supply signal and / or the carrier signal further includes predefined second information, and the second information includes one or more of the following:

[0195] second indication information, the second indication information being used for indicating a frequency band and / or a frequency point of the energy supply signal and / or the carrier signal;

[0196] third indication information, the third indication information being used for indicating a waveform of the energy supply signal and / or the carrier signal;

[0197] power information, the power information being used for indicating a transmission power of the energy supply signal and / or the carrier signal.

[0198] Here, the predefined second information can be understood as pre-set or specified in a protocol.

[0199] The description of the second indication information, the third indication information and the power information that can be included in the second information can refer to the description of the second indication information, the third indication information and the power information in the first information, which will not be repeated here. The second indication information, the third indication information and the power information included in the second information are different from the second indication information, the third indication information and the power information in the first information in that the first information is sent by the network device or is predefined.

[0200] In some embodiments, the wireless communication method on the first node side further includes:

[0201] The first node sends the energy supply signal and / or the carrier signal based on the information used for scheduling the transmission of the energy supply signal and / or the carrier signal.

[0202] In the embodiments of the present application, the first node sends the energy supply signal and / or the carrier signal based on the information used for scheduling the transmission of the energy supply signal and / or the carrier signal. The information used for scheduling the transmission of the energy supply signal and / or the carrier signal can include the first information sent by the network device, in which case the second indication information, the third indication information and the power information can be included in the first information. The information used for scheduling the transmission of the energy supply signal and / or the carrier signal can include the first information sent by the network device and the second information predefined, in which case the first information sent by the network device can not include the second indication information, the third indication information and the power information.

[0203] In some embodiments, the network device sends the first information in S1301, including:

[0204] The network device sends one or more first physical layer protocol data units (PPDUs), and the one or more first PPDUs carry the first information.

[0205] Correspondingly, the first node receives the first information in S1301, including:

[0206] The first node receives one or more first PPDUs, and the one or more first PPDUs carry the first information.

[0207] FIG. 14 shows a wireless communication method provided by the embodiments of the present application, which can include the following steps.

[0208] S1401. The network device transmits one or more first PPDUs, and correspondingly, the first node receives the one or more first PPDUs; wherein the one or more first PPDUs carry the first information.

[0209] The first PPDU can be understood as a PPDU carrying the first information. In the case where the network device transmits one first PPDU, the first PPDU can carry all the first information, and in the case where the network device transmits multiple first PPDUs, one first PPDU carries part of the first information.

[0210] In an example, the first information includes first scheduling information, and the network device transmits one first PPDU carrying all the first scheduling information.

[0211] In an example, the first information includes first scheduling information, and the network device transmits two first PPDUs, one first PPDU carrying part of the first scheduling information used for scheduling transmission of the energy signal, and one first PPDU carrying another part of the first scheduling information.

[0212] In an example, the first information includes second scheduling information, and the network device transmits one first PPDU carrying all the second scheduling information.

[0213] In an example, the first information includes second scheduling information, and the network device transmits two first PPDUs, one first PPDU carrying part of the second scheduling information used for scheduling transmission of the carrier signal, and one first PPDU carrying another part of the second scheduling information.

[0214] In an example, the first information includes first scheduling information and second scheduling information, and the network device transmits two first PPDUs, one first PPDU carrying the first scheduling information used for scheduling transmission of the energy signal, and one first PPDU carrying the second scheduling information used for scheduling transmission of the carrier signal.

[0215] In an example, the first information includes first scheduling information and second scheduling information, and the network device transmits two first PPDUs, one first PPDU carrying part of the first scheduling information and part of the second scheduling information, and one first PPDU carrying another part of the first scheduling information and another part of the second scheduling information.

[0216] In an embodiment of the present application, one PPDU can be understood as one frame, and the structure of the PPDU can be as shown in FIG. 15, and the PPDU can include a preamble, and can further include data and / or AMP downlink transmission. The PPDU can be alternatively described as a frame or a physical frame. For example, the first PPDU can be alternatively described as a first frame.

[0217] In an embodiment of the present application, the preamble and the data part belong to a wideband part, and the AMP downlink transmission belongs to a narrowband part. The AMP downlink transmission can include one or more of the following fields: AMP synchronization (Sync), AMP signaling (SIG), and AMP downlink data (DL data).

[0218] In an embodiment of the present application, the combination of L-STF, L-LTF, L-SIG, mark1, mark2, HE-SIG A1 / A2, and other fields that are explicitly separated from the narrowband part in the PPDU format is referred to as a preamble or a WiFi-preamble. The preamble can be followed by data in a wideband.

[0219] The preamble and the data in the wideband part can be read by a high-performance device. For the data in the wideband part, the information contained in the data can be determined only after the data is decoded. For the narrowband part, a low-performance device can read.

[0220] In an example, as shown in FIG. 16, the preamble includes the following fields: L-STF, L-LTF, L-SIG, field 1, field 2, and new SIG (New SIG). In an embodiment of the present application, the PPDU with the structure shown in FIG. 16 can be understood as a PPDU transmitted in an Ambient Internet of Things (A-IoT) system.

[0221] In some embodiments, one or more of the following fields of the first PPDU carries the first information:

[0222] a preamble, the preamble being located in a wideband part of the first PPDU;

[0223] a first field, the first field being located after the preamble and in the wideband part of the first PPDU;

[0224] a second field, the second field being located in a narrowband part of the first PPDU.

[0225] In an embodiment of the present application, the first information carried by the first PPDU can be carried in one or more of the following fields: the preamble, the first field, and the second field.

[0226] For the first information, the first information can be carried in the SIG field, the field1 field, the field2 field, and / or other newly added fields in the preamble.

[0227] The first field can be understood as a data field following the preamble.

[0228] For the second field, it can be understood as a field for downlink transmission in the narrowband part, such as one or more of the AMP Sync field, the AMP SIG field, and the AMP DL data field. In the AMP DL data field, data with control information can be carried.

[0229] In the embodiments of the present application, the manner of carrying the first information through the fields of the three field types of the preamble, the first field, and the second field can be understood as three different carrying manners, i.e., carrying manner 1, carrying the first information in the preamble, carrying manner 2, carrying the first information in the first field, and carrying manner 3, carrying the first information in the second field. For a first PPDU, one or more of the three carrying manners can be used to carry the first information.

[0230] In the case where the first information carried by the first PPDU adopts one carrying manner, one of the preamble, the first field, and the second field carries all the first information carried by the first PPDU.

[0231] In some embodiments, different fields carry different parts of the first scheduling information, and / or different fields carry different parts of the second scheduling information.

[0232] It can be understood that different parts of the first scheduling information and / or the second scheduling information are carried in different fields. At this time, the first information carried by the first PPDU adopts multiple carrying manners.

[0233] In an example, the second indication information, the third indication information, and the power information are carried in the SIG field of the preamble, and the device information and the time information are carried in the AMP-SIG field of the second field.

[0234] In an example, the first identification information and the second identification information in the device information are carried in the preamble, and the third identification information in the device information is carried in the second field.

[0235] In some embodiments, the first scheduling information and the second scheduling information are carried in the fields corresponding to the same field type or the fields corresponding to different field types.

[0236] In the embodiments of the present application, the first scheduling information and the second scheduling information adopt the same or different carrying manners.

[0237] The first information can include only the first scheduling information, only the second scheduling information, or both the first scheduling information and the second scheduling information.

[0238] In an example, if the first information includes the first scheduling information, the first scheduling information is carried in the preamble, and if the first information includes the second scheduling information, the second scheduling information is carried in the first field.

[0239] In an example, if the first information includes the first scheduling information, the first scheduling information is carried in the preamble, and if the first information includes the second scheduling information, the second scheduling information is carried in the first field.

[0240] In an example, if the first information includes both the first scheduling information and the second scheduling information, the first scheduling information and the second scheduling information are carried in the first field.

[0241] In an example, if the first information includes both the first scheduling information and the second scheduling information, the first scheduling information is carried in the preamble and the second scheduling information is carried in the first field.

[0242] It can be understood that if the first scheduling information and the second scheduling information are carried in the fields corresponding to the same field type, and the first information includes both the first scheduling information and the second scheduling information, the first scheduling information and the second scheduling information can be the same information or different information.

[0243] In some embodiments, the first information includes both the first scheduling information and the second scheduling information, and the first scheduling information and the second scheduling information are carried in the same first PPDU, or the first scheduling information and the second scheduling information are carried in different first PPDUs respectively.

[0244] In the case where the first information includes both the first scheduling information and the second scheduling information, the first information is used to schedule the transmission of the energy signal and the transmission of the carrier signal.

[0245] If the first scheduling information and the second scheduling information are carried in the same first PPDU, the transmission of the energy signal and the transmission of the carrier signal are scheduled by the first PPDU.

[0246] In an example, as shown in FIG. 17, one PPDU is used to schedule the WPT to transmit the energy signal and is used to schedule the CWN to transmit the carrier signal.

[0247] If the first scheduling information and the second scheduling information are carried in different first PPDUs, the transmission of the energy signal and the transmission of the carrier signal are scheduled by independent, i.e., different, first PPDUs.

[0248] In an example, as shown in FIG. 18, one PPDU is used to schedule the WPT to transmit the energizing signal, and another PPDU is used to schedule the CWN to transmit the carrier signal.

[0249] In some embodiments, the first scheduling information and the second scheduling information are carried in different first PPDUs, the preamble of the first PPDU carrying the first scheduling information carries different information from the preamble of the first PPDU carrying the second scheduling information.

[0250] In the case that the first scheduling information and the second scheduling information are carried in different first PPDUs, it is identified which first PPDU carries the first scheduling information and which first PPDU carries the second scheduling information based on the different information carried by the preambles of the two first PPDUs, i.e., it is identified which first PPDU schedules the transmission of the energizing signal and which first PPDU schedules the transmission of the carrier signal.

[0251] If the first node comprises a first device and a second device, the first node receives the two first PPDUs and performs the transmission of the energizing signal and the carrier signal based on the two first PPDUs.

[0252] In some embodiments, the first node is the first device, and the first node ignores the first PPDU carrying the second scheduling information.

[0253] If the first node is the first device, the first node receives the two first PPDUs, performs the transmission of the energizing signal based on the first PPDU carrying the first scheduling information, and ignores the first PPDU carrying the second scheduling information.

[0254] In some embodiments, the first node is the second device, and the second node ignores the first PPDU carrying the first scheduling information.

[0255] If the first node is the second device, the first node receives the two first PPDUs, performs the transmission of the carrier signal based on the first PPDU carrying the second scheduling information, and ignores the first PPDU carrying the first scheduling information.

[0256] In some embodiments, the first scheduling information and the second scheduling information are carried in the same first PPDU, and the first scheduling information and the second scheduling information are carried in the same field or different fields of the first PPDU.

[0257] In the case that the first scheduling information and the second scheduling information are carried in the same first PPDU, the first scheduling information and the second scheduling information can be carried in the same field of the first PPDU. For example, the first scheduling information and the second scheduling information are carried in the preamble of the first PPDU. For another example, the first scheduling information and the second scheduling information are carried in the first field of the first PPDU. For yet another example, the first scheduling information and the second scheduling information are carried in the preamble and the second field of the first PPDU.

[0258] It can be understood that the first scheduling information and the second scheduling information can be carried in the same field of the first PPDU, and the first scheduling information and the second scheduling information are the same information or different information, that is, the energy signal and the carrier signal can be considered as the same signal for scheduling, or can be considered as different signals for scheduling respectively.

[0259] In the case that the first scheduling information and the second scheduling information are carried in the same first PPDU, the first scheduling information and the second scheduling information can be carried in different fields of the first PPDU. For example, the first scheduling information is carried in the preamble of the first PPDU, and the second scheduling information is carried in the first field of the first PPDU. For another example, the first scheduling information is carried in the first field of the first PPDU, and the second scheduling information is carried in the second field of the first PPDU.

[0260] In some embodiments, in the case that the one or more fields carrying the first information are located in the wideband part of the first PPDU, the first PPDU includes or does not include a narrowband part.

[0261] In the embodiments of the present application, if the field carrying the first information of a first PPDU includes a second field, the first PPDU includes a narrowband part. If the field carrying the first information of a first PPDU is located in the wideband part of the first PPDU, that is, does not include a second field, the first PPDU can include a narrowband part or can not include a narrowband part.

[0262] In an example, as shown in FIG. 19, in 19A, the first information carried by the first PPDU is carried in the preamble or the data field, and the first PPDU does not include a narrowband part; in 19B, the first information carried by the first PPDU is carried in the preamble or the data field, and the first PPDU includes a narrowband part.

[0263] In some embodiments, part or all of the one or more first PPDUs include a narrowband part.

[0264] In the embodiments of the present application, the narrowband part included in the first PPDU can be received by the terminal device, and part or all of the one or more first PPDUs transmitted by the network device can be received by the terminal device, so that information can be transmitted to the terminal device based on the first PPDU.

[0265] In some embodiments, the narrowband part of the first PPDU is used for downlink transmission and / or indicates that the terminal device transmits uplink transmission.

[0266] Here, the narrowband part of the first PPDU used for downlink transmission can be understood as AMP downlink transmission, wherein the narrowband part of the first PPDU can indicate transmission of AMP downlink data, so that the terminal device receives the AMP downlink data based on the narrowband part of the first PPDU.

[0267] In the case that the narrowband part of the first PPDU is used to indicate that the terminal device transmits uplink transmission, the uplink transmission transmitted by the terminal device can be understood as AMP uplink transmission, wherein the AMP uplink transmission can include AMP uplink data, and can also include: AMP uplink synchronization, AMP uplink signaling, wherein the AMP uplink synchronization is used for uplink synchronization, and the AMP uplink signaling is used to indicate transmission of the AMP uplink data, so that the network device receives the AMP uplink data.

[0268] In the embodiments of the present application, the narrowband part of the first PPDU can be used for downlink transmission and / or downlink transmission between the terminal device and the network device, and the interaction reliability between the terminal device and the network device is improved.

[0269] In some embodiments, the first information includes second scheduling information.

[0270] In the embodiments of the present application, in the case that the first information includes the second scheduling information, part or all of the one or more first PPDUs transmitted by the network device include the narrowband part.

[0271] Here, in the case that the network device schedules transmission of the carrier signal based on the first information, the terminal device is indicated to transmit uplink transmission based on the narrowband part of the transmitted first PPDU, so that the transmission of the carrier signal and the transmission of the uplink transmission of the terminal device can be aligned, and the carrier signal can be provided in time for the uplink transmission of the terminal device.

[0272] In some embodiments, the method further comprises:

[0273] The network device transmits a second PPDU, and a narrowband part of the second PPDU is used for downlink transmission and / or indicates that the terminal device transmits uplink transmission.

[0274] As shown in FIG. 20, the network device transmits one or more first PPDUs and a second PPDU, and the first node receives one or more first PPDUs and a second PPDU. The one or more first PPDUs are used to carry first information, and the second PPDU is used for the terminal device to receive downlink transmission and / or send uplink transmission. The narrowband part of the second PPDU is used for downlink transmission and / or indicates the terminal device to send uplink transmission, i.e., is used for the terminal device to receive downlink transmission and / or send uplink transmission. The description of the narrowband part of the second PPDU can be referred to the description of the narrowband part of the first PPDU used for downlink transmission and / or indicating the terminal device to send uplink transmission, which will not be described herein again.

[0275] In some embodiments, the information carried by the preamble of the first PPDU is different from the information carried by the preamble of the second PPDU.

[0276] In the case where the network device transmits the first PPDU and the second PPDU, the first PPDU and the second PPDU are identified based on the difference between the information carried by the preamble of the first PPDU and the information carried by the preamble of the second PPDU.

[0277] In the embodiments of the present application, for WPT and / or CWN, in the case where the first PPDU and the second PPDU are received, the transmission of the energizing signal and / or the carrier signal is performed based on the scheduling of the first PPDU, and the second PPDU is ignored. For the terminal device, in the case where the first PPDU and the second PPDU are received, the reception of the AMP downlink transmission and / or the transmission of the AMP uplink transmission is performed based on the second PPDU, and the first PPDU is ignored.

[0278] In the embodiments of the present application, the narrowband part used for downlink transmission and / or indicating the terminal device to send uplink transmission can be the narrowband part of the first PPDU, or the narrowband part of the second PPDU, and the PPDU in which the narrowband part used for indicating the terminal device to receive downlink transmission and / or send uplink transmission can be one of the one or more first PPDUs scheduling the first information, or another second PPDU.

[0279] In an example, the network device broadcasts a first PPDU, the first PPDU is used to schedule the transmission of the carrier signal, and the narrowband part is used to indicate downlink transmission and / or indicate the terminal device to send uplink transmission. Then, the second device transmits the carrier signal based on the first PPDU, and the terminal device receives downlink transmission and / or sends uplink transmission based on the first PPDU.

[0280] In an example, the network device broadcasts a first PPDU and a second PPDU, the first PPDU is used to schedule the transmission of the carrier signal, and the narrowband part of the second PPDU is used to indicate the downlink transmission and / or instruct the terminal device to transmit the uplink transmission, then the first device transmits the carrier signal based on the first PPDU, and the terminal device receives the downlink transmission and / or transmits the uplink transmission based on the second PPDU.

[0281] In an example, the network device broadcasts two first PPDUs and a second PPDU, one first PPDU is used to schedule the transmission of the energy supply signal, and one first PPDU is used to schedule the transmission of the carrier signal, and the narrowband part of the second PPDU is used to indicate the downlink transmission and / or instruct the terminal device to transmit the uplink transmission, then the first device transmits the energy supply signal based on the first PPDU scheduling the energy supply signal, the second device transmits the carrier signal based on the first PPDU scheduling the carrier signal, and the terminal device receives the downlink transmission and / or transmits the uplink transmission based on the second PPDU.

[0282] In the following, the wireless communication method provided by the embodiments of the present application is described through multiple embodiments.

[0283] The embodiments of the present application provide a method for scheduling an energy supply node (WPT) to transmit an energy supply signal and / or a carrier node to transmit a carrier signal, wherein the scheduling information, i.e., the first information, is issued by an AP,

[0284] The scheduling information includes the following information:

[0285] The ID information of the device, such as the ID information of the target energy supply node or the carrier node, or the ID information of the target A-IoT device, is used by the energy supply node or the carrier node to determine whether it is within the coverage range of the A-IoT device, so as to determine whether to transmit the energy supply signal / carrier signal to respond to the scheduling information.

[0286] The duration length and / or position: the time length can be directly calculated from the Rate and Length in the L-SIG, and the starting position is after the WiFi-Preamble; or some fields are added to describe the position and duration of the energy supply signal and / or the carrier signal.

[0287] Optionally, the duration of the energy supply signal can be the same as the duration of the carrier signal; or the duration of the energy supply signal is longer than the duration of the carrier signal (the carrier signal only needs to cover the AMP UL data part, and the energy supply signal needs to be longer to continuously charge / energize the A-IoT device).

[0288] The frequency point / frequency band of the energy supply signal and / or the carrier signal (such as in the 900MHz frequency band, 2.4GHz frequency point);

[0289] Waveform of the energy supply signal and / or carrier signal (e.g. sine wave or square wave, frequency of the sine wave, duty cycle and pulse width of the square wave, and other parameters);

[0290] Information such as transmission power of the energy supply signal and / or carrier signal.

[0291] If the standard determines that some of the above information is a predefined or determined value, such as the energy supply signal being fixed as a sine wave, or the frequency being fixed at 900MHz, etc., the scheduling instruction can not contain this information.

[0292] The bearing mode of the scheduling information: it can be carried in the SIG field, Mark field of WiFi-preamble and / or other newly added fields, or carried in the data after WiFi-preamble, or carried in the AMP-Sync / AMP-Sig field. Since the energy supply node or carrier node has strong capability, it can directly read the wideband WiFi-preamble and data information.

[0293] Different scheduling information can be carried in different ways, such as the frequency band, waveform, power, etc. of the energy supply signal and / or carrier signal can be carried in the SIG field of WiFi-preamble, while the target A-IoT device ID information, UL-data transmission duration, etc. are in the narrowband AMP-SIG field.

[0294] Optionally, the energy supply signal and the carrier signal can be scheduled separately, or the energy supply signal and the carrier signal can be scheduled simultaneously.

[0295] Optionally, the fields of the energy supply signal and the fields of the carrier signal share the same fields, or the fields of the energy supply signal and the fields of the carrier signal use two different groups of fields. For example:

[0296] Same field: ID of target A-IoT device + duration / position, when the energy supply node and the carrier node determine according to the ID of the target A-IoT device that it is within its range, and then send the energy supply signal and the carrier signal according to the subsequent duration / position indication information.

[0297] Different fields: the first group of fields = energy supply node ID + energy supply carrier duration / position, and the second group of fields = carrier node ID + carrier duration / position; the energy supply node and the carrier node respectively send the energy supply signal and the carrier signal according to the corresponding ID information.

[0298] The wireless communication method provided by the embodiments of the present application can be implemented as, but not limited to, the following embodiments one to three.

[0299] Embodiment one, only scheduling the energy supply signal

[0300] Embodiment one considers scenario 1, i.e. AP only needs to schedule WPT to transmit energy signal, which is applicable to the case that STA only charges but does not need to transmit UL data; or the case that carrier node is integrated with AP in one device (no need of scheduling signaling, AP internal implementation); or the case that carrier node is integrated with WPT in one device (WPT transmits energy signal and carrier signal simultaneously according to one scheduling information, or even can regard energy signal and carrier signal as the same signal).

[0301] Under scenario 1, it can include but is not limited to FIG. 21A to FIG. 21H.

[0302] In FIG. 21A, only energy signal is scheduled, scheduled by WiFi-preamble.

[0303] In FIG. 21B, only energy signal is scheduled, scheduled by wideband data.

[0304] In FIG. 21C, energy signal and AMP data are scheduled, scheduled by WiFi-preamble.

[0305] In FIG. 21D, energy signal and AMP data are scheduled, scheduled by wideband data.

[0306] In FIG. 21E, energy signal and AMP data are scheduled. The scheduling of energy signal and the scheduling of AMP data are carried by different physical frames. Among them, the first frame WiFi-preamble 1 is mainly used to schedule energy signal, and the second frame WiFi-preamble 2 is mainly used to schedule AMP data. The SIG / field1 / field2 / New SIG fields of the two frames can not be completely the same, which are used to distinguish different physical frame types. Since the AP cannot accurately predict the time when the second frame can acquire the channel when sending the first frame, the scheduled energy signal needs to be in a relatively long time window to ensure that the A-IoT device can acquire enough energy.

[0307] In FIG. 21F, energy signal and AMP data are scheduled. The scheduling of energy signal and the scheduling of AMP data are carried by different physical frames. Similar to FIG. 21E, the difference is that the scheduling information is carried in wideband data.

[0308] In FIG. 21G, energy signal and AMP data are scheduled. Among them, part of the information of the scheduling of energy signal can be carried by WiFi-preamble; and the other part can be carried by narrowband AMP SIG.

[0309] In FIG. 21H, energy signal and AMP data are scheduled. Among them, part of the information of the scheduling of energy signal can be carried by wideband data; and the other part can be carried by narrowband AMP Sync.

[0310] It should be noted that part of the information scheduling the power supply signal is part of the scheduling information, which can be carried by the wideband SIG / field1 / field2, or wideband data; another part (such as time information) can be carried by the narrowband AMP Sync / SIG / DL data. For example: the wideband part indicates that the WPT needs to send the power supply signal (turn on the signaling); the narrowband part such as the AMP SYNC / SIG field needs to also notify the A-IOT device of the data length of the DL data to be received, and the WPT can determine the end time of the power supply signal transmission by using the indication information. Here, the WPT is required to be able to decode the wideband signal and the narrowband signal at the same time.

[0311] Embodiment two, only scheduling carrier signal

[0312] Embodiment two considers scenario 2, that is, the AP only needs to schedule the carrier node to send the carrier signal, which is applicable to the case where the STA sends UL data by backscatter, and the carrier node and the AP are independent nodes; or the case where the power supply node and the AP are integrated in one device (no need to schedule the power supply signal, implemented internally by the AP); or the case where the carrier node and the WPT are integrated in one device (the WPT sends the power supply signal and the carrier signal according to one scheduling information, and even the power supply signal and the carrier signal can be regarded as the same signal)

[0313] Under scenario 2, it can include but is not limited to FIGS. 22A to 22F.

[0314] In FIG. 22A, the carrier signal and the AMP data are scheduled, and the carrier signal is scheduled by WiFi-preamble. Among them, the non-AMP uplink transmission (AMP UL) in FIG. 22A can include AMP data and AMP uplink synchronization, AMP uplink signaling.

[0315] In FIG. 22B, the carrier signal and the AMP data are scheduled, and the carrier signal is scheduled by wideband data.

[0316] In FIG. 22C, the power supply signal and the AMP data are scheduled, and the carrier signal is scheduled by WiFi-preamble. The scheduling of the carrier signal and the scheduling of the AMP data are carried by different physical frames. Among them, the first frame WiFi-preamble 1 is used to schedule the carrier signal, and the second frame WiFi-preamble 2 schedules the AMP data. The SIG / field1 / field2 / New SIG fields of the two frames can not be exactly the same, which are used to distinguish different physical frame types.

[0317] In FIG. 22D, the scheduling power signal and the AMP data are scheduled with the wideband data scheduling carrier signal. The scheduling carrier signal and the scheduling AMP data are carried by different physical frames. Similar to FIG. 22C, only the information of the scheduling carrier signal is carried in the wideband data part.

[0318] In FIG. 22E, the scheduling power signal and the AMP data are scheduled, and part of the information of the scheduling carrier signal is carried by the WiFi-preamble, and the other part can be carried by the narrowband AMP Sync / SIG / DL data.

[0319] In FIG. 22F, the scheduling power signal and the AMP data are scheduled, and part of the information of the scheduling carrier signal is carried by the wideband data, and the other part can be carried by the narrowband AMP Sync / SIG / DL data.

[0320] In actual applications, in the scenario of scheduling the power signal and the AMP data, the information of the scheduling carrier signal and all the information of the scheduling AMP data are carried by the narrowband AMP Sync / SIG / DL data. Since the narrowband downlink Sync / SIG / DL data with control contains the information of the UL to be sent by the scheduled A-IOT device, the CWN can determine the time of the carrier signal transmission by using the indication information, so as to ensure that the transmitted carrier signal can contain the AMP uplink transmission.

[0321] In the case of carrying the information of the scheduling carrier signal in the narrowband part, the CWN is required to decode the wideband signal and the narrowband signal at the same time. There can be an AMP SIG field between the AMP Sync and the DL data in the narrowband signal part.

[0322] In the second embodiment, the narrowband part such as the AMP SYNC / SIG field itself needs to also notify the data length of the UL to be sent by the A-IOT device, and the CWN can determine the time of the carrier signal transmission by using the indication information, so as to ensure that the transmitted carrier signal can contain the AMP uplink transmission.

[0323] Embodiment three, scheduling power signal and carrier signal

[0324] The third embodiment considers scenario 3, that is, the AP only needs to schedule the carrier node CWN to send the carrier signal and the power supply node WPT to send the power signal at the same time, which is applicable to the case that the STA sends the UL data by backscattering, and the carrier node, the power supply node and the AP are all independent nodes.

[0325] Under scenario 3, it can include but is not limited to FIGS. 23A to 23D.

[0326] In FIG. 23A, the power signal, the carrier signal and the AMP data are scheduled, the power signal and the carrier signal are scheduled by WiFi-preamble. As mentioned above, the fields / information in the WiFi-preamble scheduling the power signal and the carrier signal can be the same or different.

[0327] In FIG. 23B, the power signal, the carrier signal and the AMP data are scheduled, the power signal and the carrier signal are scheduled by wideband data.

[0328] In FIG. 23C, the power signal, the carrier signal and the AMP data are scheduled, the power signal and the carrier signal are scheduled by WiFi-preamble. The carrier signal and the power signal are carried by different physical frames, the information scheduling the AMP data can be carried by one of the physical frames. Among them, the first frame of WiFi-preamble 1 is used to schedule the power signal, the second frame of WiFi-preamble 2 is used to schedule the carrier signal and the AMP data, the SIG / field1 / field2 / New SIG fields of the two frames can not be exactly the same, which are used to distinguish different physical frame types.

[0329] In FIG. 23D, the power signal, the carrier signal and the AMP data are scheduled, the power signal and the carrier signal are scheduled by wideband data. The carrier signal and the power signal are carried by different physical frames, the information scheduling the AMP data can be carried by one of the physical frames.

[0330] In FIG. 23E, the power signal, the carrier signal and the AMP data are scheduled, the power signal is scheduled by WiFi-preamble, and the carrier signal is scheduled by wideband data. The carrier signal and the power signal and the AMP data are carried by different physical frames respectively. Among them, the preamble in the physical frame scheduling the power signal is preamble 1, the preamble in the physical frame scheduling the carrier signal is preamble 2, and the preamble in the physical frame scheduling the AMP data is preamble 3.

[0331] In the embodiment of the present application, in the case that the power supply signal, the carrier signal and the AMP data are scheduled through different physical frames as shown in FIG. 23E, the data field of the wideband part of the physical frame scheduling the power supply signal carries the first scheduling information, and the preamble of the physical frame scheduling the carrier signal carries the second scheduling information, but the carrying manners of the first scheduling information and the second scheduling information are not limited to the case shown in FIG. 23E, for example, the preamble of the physical frame scheduling the power supply signal carries the first scheduling information, and the data field of the wideband part of the physical frame scheduling the carrier signal carries the second scheduling information; for another example, the narrowband part of the physical frame scheduling the power supply signal carries the first scheduling information, and the narrowband part of the physical frame scheduling the carrier signal carries the second scheduling information; for another example, the preamble of the physical frame scheduling the power supply signal carries the first scheduling information, and the narrowband part of the physical frame scheduling the carrier signal carries the second scheduling information. The narrowband part of the physical frame scheduling the AMP data carries the downlink transmission of the AMP data.

[0332] It should be noted that in the embodiment of the present application, the AMP UL transmission of the A-IoT transmission includes AMP UL sync (optional), AMP UL SIG (optional) and AMP UL data. In some cases, the A-IoT device may send a Sync for uplink synchronization or a SIG for indicating part of the information before sending the UL data. However, no matter what type of UL signal or channel the A-IOT device sends, it needs to be modulated by means of and on the basis of the carrier signal.

[0333] In the embodiment of the present application, in order to flexibly schedule the carrier signal and / or the power supply signal and avoid unnecessary signal overhead and interference, the present technical solution provides a method for scheduling the carrier signal and / or the power supply signal, comprising:

[0334] 1) scheduling the carrier node and / or the power supply node by sending scheduling information by the AP, the scheduling information including the ID information, the time length and the position of the device, the frequency band, the waveform, the transmission power and other information of the carrier signal and / or the power supply signal.

[0335] 2) the carrying manner of the scheduling information can be carried through the wideband SIG domain, the newly added domain, the wideband data payload, or can be carried through the narrowband AMP DL sync, the AMP SIG, etc.

[0336] The preferred embodiments of the present application are described in detail with reference to the accompanying drawings, but the present application is not limited to the specific details in the above-described embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application. For example, in the above-described specific embodiments, various specific technical features described in the embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combination manners are not described again in the present application. For another example, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, and it should also be considered as disclosed in the present application. For another example, under the premise of no conflict, various embodiments described in the present application and / or technical features in various embodiments can be combined with any prior art, and the technical solutions obtained after combination should also fall within the protection scope of the present application.

[0337] It should also be understood that, in various method embodiments of the present application, the magnitude of the sequence number of the above-described processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink", "uplink" and "sidelink" are used to represent the transmission direction of signals or data, wherein "downlink" is used to represent the first direction of the transmission direction of signals or data from the station to the user equipment of the cell, "uplink" is used to represent the second direction of the transmission direction of signals or data from the user equipment of the cell to the station, and "sidelink" is used to represent the third direction of the transmission direction of signals or data from the user equipment 1 to the user equipment 2. For example, "downlink signal" represents that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, and means that there can be three relationships. Specifically, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0338] FIG. 24 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in FIG. 24, the network device 2400 includes:

[0339] The first communication unit is configured to send first information, wherein the first information is used to schedule the transmission of the energy supply signal and / or the carrier signal; the energy supply signal is used to perform radio frequency energy harvesting for the terminal device, and the carrier signal is used for the terminal device to perform backscattering communication.

[0340] In some embodiments, the first information comprises the first scheduling information and / or the second scheduling information, the first scheduling information being used for scheduling transmission of the energy supply signal, and the second scheduling information being used for scheduling transmission of the carrier signal.

[0341] In some embodiments, the first scheduling information and / or the second scheduling information comprises one or more of:

[0342] device information, the device information being used for indicating one or more of: a first device and / or a second device, the terminal device, the first device being used for transmitting the energy supply signal, and the second device being used for transmitting the carrier signal:

[0343] time information, the time information being used for indicating a transmission time of the energy supply signal and / or the carrier signal;

[0344] first indication information, the first indication information being used for indicating enabling or disabling transmission of the energy supply signal and / or the carrier signal.

[0345] In some embodiments, the first scheduling information and / or the second scheduling information further comprises one or more of:

[0346] second indication information, the second indication information being used for indicating a frequency band and / or a frequency point of the energy supply signal and / or the carrier signal;

[0347] third indication information, the third indication information being used for indicating a waveform of the energy supply signal and / or the carrier signal;

[0348] power information, the power indication information being used for indicating a transmission power of the energy supply signal and / or the carrier signal.

[0349] In some embodiments, the first scheduling information and the second scheduling information are the same information or different information.

[0350] In some embodiments, the information used for scheduling transmission of the energy supply signal and / or the carrier signal further comprises predefined second information, the second information comprising one or more of:

[0351] second indication information, the second indication information being used for indicating a frequency band and / or a frequency point of the energy supply signal and / or the carrier signal;

[0352] third indication information, the third indication information being used for indicating a waveform of the energy supply signal and / or the carrier signal;

[0353] power information, the power indication information being used for indicating a transmission power of the energy supply signal and / or the carrier signal.

[0354] In some embodiments, the first communication unit 2401 is further configured to transmit one or more first physical layer protocol data units (PPDUs) carrying the first information.

[0355] In some embodiments, one or more of the following fields of the first PPDU carries the first information:

[0356] a preamble, the preamble being located in a wideband part of the first PPDU;

[0357] a first field, the first field being located after the preamble and in the wideband part of the first PPDU;

[0358] a second field, the second field being located in a narrowband part of the first PPDU.

[0359] In some embodiments, different fields carry different parts of the first scheduling information, and / or different fields carry different parts of the second scheduling information.

[0360] In some embodiments, the first scheduling information and the second scheduling information are carried in fields corresponding to the same field type, or in fields corresponding to different field types.

[0361] In some embodiments, the first information includes first scheduling information and second scheduling information, the first scheduling information and the second scheduling information being carried in the same first PPDU, or the first scheduling information and the second scheduling information being carried in different first PPDUs respectively.

[0362] In some embodiments, the first scheduling information and the second scheduling information are carried in different first PPDUs, a preamble of a first PPDU carrying the first scheduling information carrying information different from a preamble of a first PPDU carrying the second scheduling information.

[0363] In some embodiments, the first scheduling information and the second scheduling information are carried in the same first PPDU, the first scheduling information and the second scheduling information being carried in the same field or different fields of the first PPDU.

[0364] In some embodiments, where one or more fields carrying the first information are located in a wideband part of the first PPDU, the first PPDU includes or does not include a narrowband part.

[0365] In some embodiments, some or all of the one or more first PPDUs include a narrowband part.

[0366] In some embodiments, the narrow-band part of the first PPDU is used for downlink transmission and / or indicates the terminal device to send uplink transmission.

[0367] In some embodiments, the first information comprises second scheduling information.

[0368] In some embodiments, the first communication unit 2401 is further configured to send a second PPDU, a narrow-band part of the second PPDU being used for downlink transmission and / or indicating the terminal device to send uplink transmission.

[0369] In some embodiments, the information carried by the preamble of the first PPDU is different from the information carried by the preamble of the second PPDU.

[0370] The first communication unit in the network device can be implemented by a transceiver in the network device.

[0371] FIG. 25 is a structural composition diagram of a first node according to an embodiment of the present application. As shown in FIG. 25, the first node 2500 comprises:

[0372] A second communication unit 2501 configured to receive first information, the first information being used for scheduling transmission of an energy supply signal and / or a carrier signal, the energy supply signal being used for radio frequency energy harvesting of a terminal device, and the carrier signal being used for backscattering communication of the terminal device.

[0373] In some embodiments, the first node comprises a first device and / or a second device, the first device being used for sending the energy supply signal, and the second device being used for sending the carrier signal.

[0374] In some embodiments, the first information comprises the first scheduling information and / or the second scheduling information, the first scheduling information being used for scheduling transmission of the energy supply signal, and the second scheduling information being used for scheduling transmission of the carrier signal.

[0375] In some embodiments, the first scheduling information and / or the second scheduling information comprises one or more of the following:

[0376] Device information, the device information being used for indicating one or more of the following: a first device and / or a second device, and a terminal device, the first device being used for sending the energy supply signal, and the second device being used for sending the carrier signal:

[0377] Time information, the time information being used for indicating a transmission time of the energy supply signal and / or the carrier signal.

[0378] First indication information, the first indication information being used for indicating enabling or disabling transmission of the energy supply signal and / or the carrier signal.

[0379] In some embodiments, the first scheduling information and / or the second scheduling information further comprises one or more of:

[0380] second indication information, the second indication information being used for indicating a frequency band and / or a frequency point of the energy supply signal and / or the carrier signal;

[0381] third indication information, the third indication information being used for indicating a waveform of the energy supply signal and / or the carrier signal;

[0382] power information, the power indication information being used for indicating a transmission power of the energy supply signal and / or the carrier signal.

[0383] In some embodiments, the first scheduling information and the second scheduling information are the same information or different information.

[0384] In some embodiments, the information used for scheduling the transmission of the energy supply signal and / or the carrier signal further comprises predefined second information, the second information comprising one or more of:

[0385] second indication information, the second indication information being used for indicating a frequency band and / or a frequency point of the energy supply signal and / or the carrier signal;

[0386] third indication information, the third indication information being used for indicating a waveform of the energy supply signal and / or the carrier signal;

[0387] power information, the power indication information being used for indicating a transmission power of the energy supply signal and / or the carrier signal.

[0388] In some embodiments, the second communication unit 2502 is further configured to transmit the energy supply signal and / or the carrier signal based on the information used for scheduling the transmission of the energy supply signal and / or the carrier signal.

[0389] In some embodiments, the second communication unit 2502 is further configured to receive one or more first physical layer protocol data units (PPDUs), the one or more first PPDUs carrying the first information.

[0390] In some embodiments, one or more of the following fields of the first PPDU carries the first information:

[0391] a preamble, the preamble being located in a wideband part of the first PPDU;

[0392] a first field, the first field being located after the preamble and in the wideband part of the first PPDU;

[0393] a second field located in a narrowband part of the first PPDU.

[0394] In some embodiments, different fields carry different parts of the first scheduling information, and / or different fields carry different parts of the second scheduling information.

[0395] In some embodiments, the first scheduling information and the second scheduling information are carried in fields corresponding to a same field type, or in fields corresponding to different field types.

[0396] In some embodiments, the first information includes first scheduling information and second scheduling information, the first scheduling information and the second scheduling information are carried in a same first PPDU, or the first scheduling information and the second scheduling information are respectively carried in different first PPDUs.

[0397] In some embodiments, the first scheduling information and the second scheduling information are carried in different first PPDUs, a preamble of a first PPDU carrying the first scheduling information carries information different from information carried by a preamble of a first PPDU carrying the second scheduling information.

[0398] In some embodiments, the first node is a first device, and the first node further includes a first control unit configured to ignore the first PPDU carrying the second scheduling information.

[0399] In some embodiments, the first node is a second device, and the second node further includes a second control unit configured to ignore the first PPDU carrying the first scheduling information.

[0400] In some embodiments, the first scheduling information and the second scheduling information are carried in a same first PPDU, and the first scheduling information and the second scheduling information are carried in a same field or different fields of the first PPDU.

[0401] In some embodiments, where one or more fields carrying the first information are located in a wideband part of the first PPDU, the first PPDU includes or does not include a narrowband part.

[0402] In some embodiments, some or all of the one or more first PPDUs include a narrowband part.

[0403] In some embodiments, the narrowband part of the first PPDU is used for downlink transmission and / or indicates the terminal device to send uplink transmission.

[0404] In some embodiments, the first information includes second scheduling information.

[0405] The second communication unit in the first node can be implemented by a transceiver in the first node. The first control unit and the second control unit in the first node can be implemented by a processor in the first node.

[0406] Those skilled in the art should understand that the above description of the network device or the first node in the embodiments of the present application can be understood with reference to the description of the wireless communication method in the embodiments of the present application.

[0407] FIG. 26 is a schematic structural diagram of a communication device 2600 provided in the embodiments of the present application. The communication device can be a network device or a first node. The communication device 2600 shown in FIG. 26 includes a processor 2610, which can call and run a computer program from a memory to implement the method in the embodiments of the present application.

[0408] Optionally, as shown in FIG. 26, the communication device 2600 can further include a memory 2620. The processor 2610 can call and run a computer program from the memory 2620 to implement the method in the embodiments of the present application.

[0409] The memory 2620 can be a separate device independent of the processor 2610, or can be integrated in the processor 2610.

[0410] Optionally, as shown in FIG. 26, the communication device 2600 can further include a transceiver 2630, which can be controlled by the processor 2610 to communicate with other devices, specifically, to send information or data to other devices or receive information or data sent by other devices.

[0411] The transceiver 2630 can include a transmitter and a receiver. The transceiver 2630 can further include an antenna, and the number of antennas can be one or more.

[0412] Optionally, the communication device 2600 can be specifically a network device in the embodiments of the present application, and the communication device 2600 can implement the corresponding processes in the methods of the embodiments of the present application implemented by the network device. For the sake of brevity, details are not described herein.

[0413] Optionally, the communication device 2600 can be specifically a first node in the embodiments of the present application, and the communication device 2600 can implement the corresponding processes in the methods of the embodiments of the present application implemented by the first node. For the sake of brevity, details are not described herein.

[0414] FIG. 27 is a schematic structural diagram of a chip in the embodiments of the present application. The chip 2700 shown in FIG. 27 includes a processor 2710, which can call and run a computer program from a memory to implement the method in the embodiments of the present application.

[0415] Optionally, as shown in FIG. 27, the chip 2700 can further include a memory 2720. Wherein the processor 2710 can call and run a computer program from the memory 2720 to implement the method in the embodiments of the present application.

[0416] Wherein the memory 2720 can be a separate device independent of the processor 2710, or can be integrated in the processor 2710.

[0417] Optionally, the chip 2700 can further include an input interface 2730. Wherein the processor 2710 can control the input interface 2730 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

[0418] Optionally, the chip 2700 can further include an output interface 2740. Wherein the processor 2710 can control the output interface 2740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

[0419] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes realized by the network device in each method of the embodiments of the present application. For the sake of brevity, it will not be repeated here.

[0420] Optionally, the chip can be applied to the first node in the embodiments of the present application, and the chip can implement the corresponding processes realized by the first node in each method of the embodiments of the present application. For the sake of brevity, it will not be repeated here.

[0421] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0422] FIG. 28 is a schematic block diagram of a communication system 2800 provided by the embodiments of the present application. As shown in FIG. 28, the communication system 2800 includes a network device 2810 and a first node 2820.

[0423] Wherein the network device 2810 can be used to implement the corresponding functions realized by the network device in the above method, and the first node 2820 can be used to implement the corresponding functions realized by the first node in the above method. For the sake of brevity, it will not be repeated here.

[0424] It should be understood that the processor of the embodiments of the present application can be an integrated circuit chip with a processing capability of signals. In the implementation process, each step of the method embodiments described above can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware coding processor for execution, or a combination of hardware and software modules in the coding processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0425] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a random access memory (Random Access Memory, RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0426] It should be understood that the above-mentioned memory is exemplary but not limiting, for example, the memory in the embodiments of the present application can also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and the like. That is, the memory in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.

[0427] The embodiment of the present application further provides a computer readable storage medium for storing the computer program.

[0428] Optionally, the computer readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0429] Optionally, the computer readable storage medium can be applied to the first node in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the first node in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0430] The embodiment of the present application further provides a computer program product comprising computer program instructions.

[0431] Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0432] Optionally, the computer program product can be applied to the first node in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the first node in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0433] The embodiment of the present application further provides a computer program.

[0434] Optionally, the computer program can be applied to the network device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0435] Optionally, the computer program can be applied to the first node in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the first node in the various methods of the embodiment of the present application. For the sake of brevity, details are not described herein.

[0436] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware or in combination of computer software and electronic hardware. Whether the functions are realized in hardware or software mode depends on the specific application and design constraints of the technical solutions. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0437] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0438] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0439] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0440] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0441] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the essential part or part of the technical solutions that make contributions to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0442] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, the method comprising: a network device transmitting first information, the first information being used for scheduling transmission of an energy signal and / or a carrier signal; the energy signal being used for radio frequency energy harvesting by a terminal device, and the carrier signal being used for backscattering communication by the terminal device.

2. The method of claim 1, wherein, the first information comprising first scheduling information and / or second scheduling information, the first scheduling information being used for scheduling transmission of the energy signal, and the second scheduling information being used for scheduling transmission of the carrier signal.

3. The method of claim 2, wherein, the first scheduling information and / or the second scheduling information comprising one or more of: device information, the device information being used for indicating one or more of: a first device and / or a second device, and the terminal device, the first device being used for transmitting the energy signal, and the second device being used for transmitting the carrier signal; time information, the time information being used for indicating a time of transmission of the energy signal and / or the carrier signal; first indication information, the first indication information being used for indicating enabling or disabling transmission of the energy signal and / or the carrier signal.

4. The method of claim 3, wherein, the first scheduling information and / or the second scheduling information further comprising one or more of: second indication information, the second indication information being used for indicating a frequency band and / or a frequency point of the energy signal and / or the carrier signal; third indication information, the third indication information being used for indicating a waveform of the energy signal and / or the carrier signal; power information, the power indication information being used for indicating a transmission power of the energy signal and / or the carrier signal.

5. The method according to any one of claims 2 to 4, wherein, the first scheduling information and the second scheduling information being the same information or different information.

6. The method of claim 3, wherein, information used for scheduling transmission of the energy signal and / or the carrier signal further comprising predefined second information, the second information comprising one or more of: second indication information, the second indication information being used for indicating a frequency band and / or a frequency point of the energy signal and / or the carrier signal; third indication information, the third indication information being used for indicating a waveform of the energy signal and / or the carrier signal; power information, the power indication information being used for indicating a transmission power of the energy signal and / or the carrier signal.

7. The method according to any one of claims 1 to 6, wherein, the network device transmitting the first information comprising: the network device transmitting one or more first physical layer protocol data units (PPDUs) carrying the first information.

8. The method of claim 7, wherein, one or more of the following fields of the first PPDUs carrying the first information: a preamble, the preamble being located in a wideband part of the first PPDUs; a first field, the first field being located after the preamble and in the wideband part of the first PPDUs; a second field, the second field being located in a narrowband part of the first PPDUs.

9. The method of claim 8, wherein, different fields carrying different parts of the first scheduling information, and / or different fields carrying different parts of the second scheduling information.

10. The method of claim 8 or 9, wherein, the first scheduling information and the second scheduling information being carried in fields corresponding to the same field type, or in fields corresponding to different field types.

11. The method according to any one of claims 7 to 10, wherein, The first information includes first scheduling information and second scheduling information, the first scheduling information and the second scheduling information are carried in a same first PPDU, or the first scheduling information and the second scheduling information are respectively carried in different first PPDUs.

12. The method of claim 11, wherein, The first scheduling information and the second scheduling information are carried in different first PPDUs, and information carried in a preamble of a first PPDU carrying the first scheduling information is different from information carried in a preamble of a first PPDU carrying the second scheduling information.

13. The method of claim 11, wherein, The first scheduling information and the second scheduling information are carried in a same first PPDU, and the first scheduling information and the second scheduling information are carried in a same field or different fields of the first PPDU.

14. The method according to any one of claims 8 to 13, wherein, In a case where one or more fields carrying the first information are located in a wideband part of the first PPDU, the first PPDU includes or does not include a narrowband part.

15. The method according to any one of claims 8 to 13, wherein, Part or all of the one or more first PPDUs include a narrowband part.

16. The method of claim 15, wherein, The narrowband part of the first PPDU is used for downlink transmission and / or indicates that the terminal device sends uplink transmission.

17. The method of claim 16, wherein, The first information includes second scheduling information.

18. The method of any one of claims 7 to 17, wherein, The method further includes: The network device sends a second PPDU, and a narrowband part of the second PPDU is used for downlink transmission and / or indicates that the terminal device sends uplink transmission.

19. The method of claim 18, wherein, Information carried in a preamble of the first PPDU is different from information carried in a preamble of the second PPDU.

20. A wireless communication method, the method comprising: A first node receives first information, the first information being used for scheduling transmission of an energy signal and / or a carrier signal; The energy signal is used for radio frequency energy harvesting of a terminal device, and the carrier signal is used for backscattering communication of a terminal device.

21. The method of claim 20, wherein, The first node includes a first device and / or a second device, the first device being used for transmitting the energy signal, and the second device being used for transmitting the carrier signal.

22. The method of claim 20 or 21, wherein, The first information includes the first scheduling information and / or the second scheduling information, the first scheduling information being used for scheduling transmission of the energy signal, and the second scheduling information being used for scheduling transmission of the carrier signal.

23. The method of claim 22, wherein, The first scheduling information and / or the second scheduling information includes one or more of the following: Device information, the device information being used for indicating one or more of the following: a first device and / or a second device, a terminal device, the first device being used for transmitting the energy signal, and the second device being used for transmitting the carrier signal: Time information, the time information being used for indicating a transmission time of the energy signal and / or the carrier signal; First indication information, the first indication information being used for indicating enabling or disabling transmission of the energy signal and / or the carrier signal.

24. The method of claim 23, wherein, The first scheduling information and / or the second scheduling information further includes one or more of the following: Second indication information, the second indication information being used for indicating a frequency band and / or a frequency point of the energy signal and / or the carrier signal; Third indication information, the third indication information being used for indicating a waveform of the energy signal and / or the carrier signal; power information, the power indication information being used for indicating a transmission power of the energy supply signal and / or the carrier signal.

25. The method of any one of claims 22 to 24, wherein, The first scheduling information and the second scheduling information are the same information or different information.

26. The method of claim 23, wherein, The information used for scheduling the transmission of the energy supply signal and / or carrier signal further comprises predefined second information, the second information comprising one or more of: second indication information, the second indication information being used for indicating a frequency band and / or frequency point of the energy supply signal and / or the carrier signal; third indication information, the third indication information being used for indicating a waveform of the energy supply signal and / or the carrier signal; power information, the power indication information being used for indicating a transmission power of the energy supply signal and / or the carrier signal.

27. The method of any one of claims 20 to 26, wherein, The method further comprises: The first node transmits the energy supply signal and / or the carrier signal based on the information used for scheduling the transmission of the energy supply signal and / or carrier signal.

28. The method of any one of claims 20 to 27, wherein, The first node receives first information, comprising: The first node receives one or more first physical layer protocol data units (PPDUs), the one or more first PPDUs carrying the first information.

29. The method of claim 28, wherein, One or more of the following fields of the first PPDUs carries the first information: a preamble, the preamble being located in a wideband part of the first PPDUs; a first field, the first field being located after the preamble and in the wideband part of the first PPDUs; a second field, the second field being located in a narrowband part of the first PPDUs.

30. The method of claim 29, wherein, Different fields carry different parts of the first scheduling information, and / or different fields carry different parts of the second scheduling information.

31. The method of claim 29 or 30, wherein, The first scheduling information and the second scheduling information are carried in fields corresponding to the same field type, or fields corresponding to different field types.

32. The method of any one of claims 28 to 31, wherein, The first information comprises first scheduling information and second scheduling information, the first scheduling information and the second scheduling information being carried in the same first PPDUs, or the first scheduling information and the second scheduling information being carried in different first PPDUs respectively.

33. The method of claim 32, wherein, The first scheduling information and the second scheduling information are carried in different first PPDUs, a preamble of a first PPDUs carrying the first scheduling information carrying different information from a preamble of a first PPDUs carrying the second scheduling information.

34. The method of claim 33, wherein, The first node is a first device, the first node ignoring a first PPDUs carrying the second scheduling information.

35. The method of claim 33, wherein, The first node is a second device, the second node ignoring a first PPDUs carrying the first scheduling information.

36. The method of claim 32, wherein, The first scheduling information and the second scheduling information are carried in the same first PPDUs, the first scheduling information and the second scheduling information being carried in the same field or different fields of the first PPDUs.

37. The method of any one of claims 29 to 36, wherein, In a case that the one or more fields carrying the first information are located in a wideband part of the first PPDUs, the first PPDUs comprise or do not comprise a narrowband part.

38. The method of any one of claims 29 to 36, wherein, Part or all of the one or more first PPDUs comprise a narrowband part.

39. The method of claim 38, wherein, The narrowband part of the first PPDU is used for downlink transmission and / or indicates the terminal device to send uplink transmission.

40. The method of claim 39, wherein, The first information comprises second scheduling information. 41.A network device comprising: a first communication unit configured to send first information, the first information being used for scheduling transmission of energy supply signals and / or carrier signals; the energy supply signals being used for radio frequency energy harvesting of terminal devices, and the carrier signals being used for backscattering communication of terminal devices. 42.A first node comprising: a second communication unit configured to receive first information, the first information being used for scheduling transmission of energy supply signals and / or carrier signals; the energy supply signals being used for radio frequency energy harvesting of terminal devices, and the carrier signals being used for backscattering communication of terminal devices.

43. A communication device comprising: a processor and a memory, the memory being used to store a computer program, the processor being used to invoke and run the computer program stored in the memory in combination with a transceiver to perform the method of any one of claims 1-19, or perform the method of any one of claims 20-40.

44. A chip comprising: a processor configured to invoke and run a computer program from a memory, so that a device in which the chip is installed performs the method of any one of claims 1-19, or performs the method of any one of claims 20-40. 45.A computer readable storage medium used to store a computer program, running of the computer program causes a computer to perform the method of any one of claims 1-19, or perform the method of any one of claims 20-40. 46.A computer program product comprising computer program instructions, running of the computer program instructions causes a computer to perform the method of any one of claims 1-19, or perform the method of any one of claims 20-40. 47.A computer program, running of the computer program causes a computer to perform the method of any one of claims 1-19, or perform the method of any one of claims 20-40.

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