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 methods and devices, chips, storage media, and software products Technical Field

[0001] This application relates to the field of mobile communication technology, specifically to a wireless communication method and device, chip, storage medium, and program product. Background Technology

[0002] Ambient Internet of Things (A-IoT) communication employs energy harvesting and backscatter communication technologies. A-IoT devices are IoT devices powered by various environmental energy sources, such as radio frequency energy, light energy, solar energy, thermal energy, and mechanical energy. These devices may have no energy storage capacity or very limited energy storage capacity (e.g., using capacitors with a capacitance of tens of microfarads (µF)).

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

[0004] Summary of the Invention

[0005] This application provides a wireless communication method and device, a chip, a storage medium, and a program product.

[0006] The wireless communication method provided in this application includes:

[0007] The network device sends first information, which is used to schedule the transmission of a power supply signal and / or a carrier signal; the power supply signal is used for radio frequency energy harvesting for the terminal device, and the carrier signal is used for backscatter communication by the terminal device.

[0008] The wireless communication method provided in this application includes:

[0009] The first node receives first information, which is used to schedule the transmission of a power supply signal and / or a carrier signal; the power supply signal is used for radio frequency energy harvesting for the terminal device, and the carrier signal is used for backscatter communication for the terminal device.

[0010] The network device provided in this application embodiment includes:

[0011] The first communication unit is configured to send first information, which is used to schedule the transmission of a power supply signal and / or a carrier signal; the power supply signal is used for radio frequency energy harvesting for the terminal device, and the carrier signal is used for backscatter communication for the terminal device.

[0012] The first node provided in this application embodiment includes:

[0013] The second communication unit is configured to receive first information, which is used to schedule the transmission of a power supply signal and / or a carrier signal; the power supply signal is used for radio frequency energy harvesting for the terminal device, and the carrier signal is used for backscatter communication for the terminal device.

[0014] The communication device provided in this application embodiment can be either the first device or the second device in the above-described scheme. The communication device includes a processor and a memory. The memory stores a computer program, and the processor calls and runs the computer program stored in the memory to execute the aforementioned wireless communication method.

[0015] The chip provided in this application embodiment is used to implement the above-described wireless communication method.

[0016] Specifically, the chip includes a processor for calling and running a computer program from a memory, causing a device equipped with the chip to perform the aforementioned wireless communication method.

[0017] The computer-readable storage medium provided in this application embodiment is used to store a computer program that causes a computer to execute the above-described wireless communication method.

[0018] The computer program product provided in this application includes computer program instructions that cause a computer to execute the above-described wireless communication method.

[0019] The computer program provided in this application embodiment, when run on a computer, causes the computer to execute the above-described 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 send power signals and / or carrier signals. When the network device does not provide power signals and / or carrier signals, that is, when there are power nodes and / or carrier nodes independent of the network device that provide power signals and / or carrier signals, the power supply and carrier of AMP communication are coordinated, thereby flexibly scheduling carrier signals and / or power signals and avoiding unnecessary signal overhead and interference. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 is a schematic diagram of an application scenario of an embodiment of this application;

[0023] Figures 2 to 6 are schematic diagrams of different frame formats of PPDU provided in the embodiments of this application;

[0024] Figure 7 is an optional system schematic diagram of a wireless communication method provided in an embodiment of this application;

[0025] Figure 8 is a schematic diagram of an optional structure of the A-IoT communication system provided in an embodiment of this application;

[0026] Figure 9 is a schematic diagram of an optional location for radio frequency energy harvesting provided in an embodiment of this application;

[0027] Figure 10 is a schematic diagram of an optional backscatter communication provided in an embodiment of this application;

[0028] Figure 11 is a schematic diagram of an optional grounding circuit for resistive load modulation provided in an embodiment of this application;

[0029] Figure 12 is a schematic diagram of the optional frame format of PPDU provided in an embodiment of this application;

[0030] Figure 13 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0031] Figure 14 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0032] Figure 15 is a schematic diagram of the optional frame format of PPDU provided in the embodiments of this application;

[0033] Figure 16 is a schematic diagram of the optional frame format of the preamble provided in an embodiment of this application;

[0034] Figure 17 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0035] Figure 18 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0036] Figure 19 is a schematic diagram of the optional frame format of PPDU provided in an embodiment of this application;

[0037] Figure 20 is an optional flowchart of the wireless communication method provided in an embodiment of this application;

[0038] Figures 21A-21H are optional flowcharts of the wireless communication method provided in the embodiments of this application;

[0039] Figures 22A-22F are optional flowcharts of the wireless communication method provided in the embodiments of this application;

[0040] Figures 23A-23E are optional flowcharts of the wireless communication method provided in the embodiments of this application;

[0041] Figure 24 is a schematic diagram of an optional structure of a network device provided in an embodiment of this application;

[0042] Figure 25 is a schematic diagram of the optional structure of the first node provided in an embodiment of this application;

[0043] Figure 26 is a schematic structural diagram of a communication device provided in an embodiment of this application;

[0044] Figure 27 is a schematic structural diagram of a chip according to an embodiment of this application;

[0045] Figure 28 is a schematic block diagram of a communication system provided in an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0047] Communication system scenarios include Terrestrial Networks (TN) and NTN. NTN typically uses satellite communication to provide communication services to terrestrial users. Current NTN systems include NR-NTN and IoT-NTN systems, and other NTN systems may be included in the future.

[0048] Figure 1 is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. As shown in Figure 1, the communication system 100 may include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 via an air interface. Multi-service transmission is supported between the terminal device 110 and the network device 120.

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

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

[0051] Network device 120 may be an evolved 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 radio controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, access point, vehicle-mounted equipment, wearable device, hub, switch, bridge, router, or a network device in a future evolved Public Land Mobile Network (PLMN), an access point (AP) in a Wi-Fi system, a wireless router, etc.

[0052] Terminal device 110 can be any terminal device, including but not limited to terminal devices that are connected to network device 120 or other terminal devices via wired or wireless connections.

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

[0054] Terminal device 110 can be used for device-to-device (D2D) communication.

[0055] The wireless communication system 100 may further include a core network device 130 that communicates with the base station. This core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or a Session Management Function (SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device for an LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions of both SMF and PGW-C. During network evolution, the aforementioned core network device may also be called by other names, or new network entities may be formed by dividing the core network functions; this embodiment does not limit this.

[0056] The various functional units in the communication system 100 can also establish connections and communicate with each other through the next generation (NG) interface.

[0057] For example, terminal devices establish an air interface connection with access network devices through the Uu interface for transmitting user plane data and control plane signaling; terminal devices can establish a control plane signaling connection with the AMF through NG interface 1 (N1); access network devices, such as next-generation radio access base stations (gNB), can establish a user plane data connection with the UPF through NG interface 3 (N3); access network devices can establish a control plane signaling connection with the AMF through NG interface 2 (N2); the UPF can establish a control plane signaling connection with the SMF through NG interface 4 (N4); the UPF can interact with the data network for user plane data through NG interface 6 (N6); the AMF can establish a control plane signaling connection with the SMF through NG interface 11 (N11); and the SMF can establish a control plane signaling connection with the PCF through NG interface 7 (N7).

[0058] Figure 1 exemplarily illustrates a base station, a core network device, and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices, and each base station may include other numbers of terminal devices within its coverage area. This application embodiment does not limit this.

[0059] It should be noted that Figure 1 is merely an example illustrating the system to which this application applies. Of course, the method shown in the embodiments of this application can also be applied to other systems. Furthermore, the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. It should also be understood that "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a related relationship. For example, A instructing B can mean that A directly instructs B, for example, B can be obtained through A; it can also mean that A indirectly instructs B, for example, A instructs C, B can be obtained through C; or it can mean that there is a related relationship between A and B. It should also be understood that "correspondence" mentioned in the embodiments of this application can indicate a direct or indirect correspondence between two things, or an related relationship between two things, or a relationship of instruction and being instructed, configuration and being configured, etc. It should also be understood that the "predefined" or "predefined rules" mentioned in the embodiments of this application can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices), and this application does not limit the specific implementation method. For example, predefined can refer to those defined in a protocol. It should also be understood that in the embodiments of this application, the "protocol" can refer to standard protocols in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems, and this application does not limit this.

[0060] To facilitate understanding of the technical solutions of the embodiments of this application, the relevant technologies of the embodiments of this application are described below. The following relevant technologies are optional solutions and can be combined with the technical solutions of the embodiments of this application in any way, and they all fall within the protection scope of the embodiments of this application.

[0061] WiFi communication systems have evolved into various versions (e.g., 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, etc.) employing different design and optimization methods to address different application scenarios, data rates, propagation distances / coverage requirements, etc. From the perspective of physical layer protocols, the Physical Layer Protocol Data Unit (PPDU) structure (physical layer frame structure) is a key design focus, as it needs to ensure interoperability between different devices.

[0062] Figures 2 to 5 show several different PPDU frame structures.

[0063] In 802.11a, as shown in Figure 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. The rate field indicates the data transmission rate, 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 may contain additional information, such as checksums or error detection codes. The STF, LTF, and SIG shown in Figure 2 are also largely adopted in the PPDU frame structure of subsequent versions.

[0064] As shown in Figure 3, the 802.11n version introduces HT, adding the HT-SIG field to the traditional 802.11a legacy preamble (the preamble in Figure 2 containing STF, LTF, and SIG). This field uses Quadrature (Q) Binary Phase Shift Keying (BPSK) modulation, allowing station (STA) equipment to distinguish between HT and non-HT PPDU types. The legacy L-STF, L-LTF, and L-SIG in Figure 3 can be understood as STF, LTF, and SIG in Figure 2.

[0065] As shown in Figure 4, 802.11ac follows a similar approach, adding a new Very High-throughput (VHT)-SIG field after the traditional preamble of 802.11a. To distinguish it from the PPDU in 802.11a shown in Figure 2 and the PPDU in 802.11n shown in Figure 3, this newly introduced VHT-SIG field includes two 4µs symbols, which are modulated using BPSK and Q-BPSK respectively.

[0066] The 802.11ba standard is designed for energy-saving users with a low-power wake-up receiver (LP-WUR). Its PPDU frame structure is shown in Figure 5, comprising a wideband non-WUR portion and a narrowband WUR portion. The non-WUR portion also includes L-SFT, L-LTF, L-SIG, and two BPSK-marks (wideband signals using OFDM modulation) for version differentiation. The non-WUR portion is designed to allow other non-WUR receivers to detect and identify the WUR PPDU, avoiding transmission within this PPDU and thus reducing interference. The WUR portion uses a narrowband signal (4MHz) and multi-carrier on-off keying (MC-OOK) modulation, including a WUR-sync section for the WUR receiver to perform PPDU detection, timing, and determine the data rate (LDR or HDR) to read subsequent data. It's important to note that the WUR portion doesn't have a dedicated SIG field to indicate the data length. Instead, it places the length information in the first few bytes of the data field (length info is encoded in the MPDU, from the MAC layer). This requires some cross-layer cooperation from the receiver; the physical layer needs to upload a portion of the data to the MAC layer to determine the data field length. This design increases receiver complexity but alleviates the WUR PPDU's need for a SIG field.

[0067] In Ambient Power Enabled IoT (Ambient IoT), due to the limited capabilities of A-IoT devices (devices), they cannot perform carrier sensing or send traditional preambles to preempt the channel. Therefore, an Access Point (AP), or reader, is typically required to perform these operations. The AP first acquires the channel through carrier sensing, then sends a legacy preamble to preempt the channel, and schedules the A-IoT device to send Ambient Power (AMP) uplink data (UL data). A possible structure of the PPDU sent by the AP is shown in Figure 6, including: preamble, AMP synchronization, AMP signaling (AMP-SIG) (optionally), and AMP downlink data (DL data). The preamble includes: L-STF, L-LTF, L-SIG, field 1, field 2, and new signaling (new SIG). AMP SIG and / or AMP DL data can be used to schedule the A-IoT device to send AMP UL data. The naming of field 1 and field 2, as well as the information they carry, can be set according to actual needs.

[0068] In addition to the AP and A-IoT device, as shown in Figure 7, the system may also need to deploy a power transfer node (WPT) and / or a carrier wave node (CWN). The power transfer node sends wireless power signals to provide power to the A-IoT device (for radio frequency power acquisition type), while the carrier wave node sends carrier signals so that the A-IoT device can modulate the received carrier signals to achieve backscatter communication.

[0069] Environmental Energy Internet of Things

[0070] The environmental energy IoT communication utilizes energy harvesting and backscatter communication technologies. As shown in Figure 8, the environmental energy IoT communication network consists of a network device 201 and an A-IoT device 202. The network device 201 sends wireless power supply signals and downlink communication signals 203 to the A-IoT device 202 and receives backscatter signals 204 from 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. Furthermore, the A-IoT device 202 may also include a memory or sensor 2024 to store basic information (such as object identification) or acquire sensor data such as ambient temperature and humidity.

[0071] Key technologies for the Internet of Things (IoT) in the environment include radio frequency energy harvesting and backscatter communication.

[0072] Radio Frequency Power Harvesting

[0073] As shown in Figure 9, the radio frequency (RF) energy harvesting module harvests electromagnetic wave energy from space based on the principle of electromagnetic induction, thereby obtaining the energy required to drive A-IoT devices, such as low-power demodulation and modulation modules, sensors, and memory access. Therefore, A-IoT devices do not require traditional batteries. The structure of the energy harvesting module, as shown in Figure 9, includes a diode 301, a capacitor 302, and a resistor 303, thereby harvesting radio frequency (RF) energy from space. Optionally, the end of capacitor 302 connected to diode 301 is the positive terminal.

[0074] Backscattering communication

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

[0076] Backscattering and load modulation are inseparable. Load modulation adjusts and controls the circuit parameters of the oscillation circuit of the A-IoT device according to the rhythm of the data flow, thereby changing parameters such as the impedance of the electronic tag and completing the modulation process.

[0077] Load modulation techniques include two methods: resistive load modulation and capacitive load modulation. In resistive load modulation, as shown in Figure 11, the load R... LA resistor R3 is connected in parallel. R3 can be called the load modulation resistor. This resistor R3 is switched on or off based on the control of the binary data stream, as shown in Figure 11. The A-IoT device also includes: resistor R2, inductor L1, inductor L2, and capacitor C2. Switching resistor R3 on and off causes a change in the circuit voltage, thus achieving amplitude shift keying (ASK) modulation. This means that the signal is modulated and transmitted by adjusting the amplitude of the backscattered signal from the A-IoT device. Similarly, in capacitive load modulation, switching the capacitor on and off can change the circuit's resonant frequency, achieving frequency shift keying (FSK) modulation. This means that the signal is modulated and transmitted by adjusting the operating frequency of the backscattered signal from the A-IoT device.

[0078] As can be seen, A-IoT devices utilize load modulation to modulate the incoming signal, thereby achieving backscatter communication. Therefore, A-IoT devices have significant advantages:

[0079] 1) A-IoT devices do not actively transmit signals, therefore they do not require complex radio frequency links, such as power amplifiers (PAs) and radio frequency filters;

[0080] 2) A-IoT devices do not need to actively generate high-frequency signals, therefore they do not need high-frequency crystal oscillators;

[0081] 3) With the help of backscatter communication, the transmission of signals from A-IoT devices does not require the A-IoT devices to consume their own energy.

[0082] Application scenarios of environmental energy IoT

[0083] Environmental energy IoT communication has significant advantages such as extremely low cost, zero power consumption, and small size, and can be widely used in various industries, such as logistics, smart warehousing, smart agriculture, energy and power, and industrial internet for vertical industries; it can also be used in personal applications such as smart wearables and smart homes.

[0084] Classification of A-IoT devices

[0085] Based on energy storage capacity and the ability to generate RF signals for signal transmission, A-IoT device terminals are classified into the following types.

[0086] 1) Passive A-IoT devices

[0087] A-IoT devices do not require internal batteries. When an A-IoT device approaches a network device (such as an RFID reader), it falls within the near-field range of the network device's antenna radiation. Therefore, the A-IoT device's antenna generates an induced current through electromagnetic induction, which drives the device's low-power chip circuitry. This circuitry demodulates the forward link signal (downlink, from the network device to the A-IoT device) and modulates the backward link signal (uplink, from the A-IoT device to the network device). For the backscatter link, the A-IoT device uses backscattering to transmit signals.

[0088] It can be seen that passive A-IoT devices do not require built-in batteries to drive either the forward or reverse links, making them true A-IoT devices.

[0089] Passive A-IoT devices do not require batteries, and their radio frequency and baseband circuits are very simple. For example, they do not require LNA (low noise amplifier), PA (power amplifier), crystal oscillator, ADC, etc. Therefore, they have many advantages such as small size, light weight, very low price, and long service life.

[0090] 2) Semi-passive A-IoT devices

[0091] Semi-passive A-IoT devices do not have conventional batteries installed, but they can harvest energy using RF energy harvesting modules or solar / photovoltaic / thermal / kinetic energy harvesting modules, storing the harvested energy in an energy storage unit (such as a capacitor). Once the energy storage unit receives energy, it can drive the low-power chip circuitry of the A-IoT device, enabling demodulation of forward link signals and modulation of backward link signals. For backscatter links, A-IoT devices use backscattering to transmit signals.

[0092] It can be seen that semi-passive A-IoT devices do not require built-in batteries to drive either the forward or reverse links. Although they use energy stored in capacitors during operation, the energy comes from the radio energy collected by the energy harvesting module, thus making them a true A-IoT device.

[0093] Semi-passive A-IoT devices inherit many advantages from passive A-IoT devices, and therefore have many advantages such as small size, light weight, very low price, and long service life.

[0094] 3) Active A-IoT devices

[0095] In some scenarios, A-IoT devices can also be active A-IoT devices. These terminals can have built-in batteries (conventional batteries, such as dry cell batteries, rechargeable lithium batteries, etc.). The battery powers the low-power chip circuitry of the A-IoT device, enabling demodulation of the forward link signal and modulation of the backward link signal. However, for the backscatter link, the A-IoT device uses backscattering to transmit signals. Therefore, the zero power consumption of this type of terminal is mainly reflected in the fact that the signal transmission of the backward link does not require the terminal's own power, but uses backscattering. Although active A-IoT devices use batteries, their power consumption is extremely low due to ultra-low power communication technology, thus significantly improving battery life compared to existing technologies.

[0096] Active A-IoT devices use built-in batteries to power RFID chips, increasing tag read / write distance and improving communication reliability. Therefore, they are used in scenarios with relatively high requirements for communication distance and read latency.

[0097] A-IoT devices are classified based on transmitter type.

[0098] The business types of environmental energy IoT, like other IoT business types, will primarily focus on upstream services. Therefore, based on the way A-IoT devices send data, they can be categorized as follows:

[0099] 1) A-IoT devices based on backscattering

[0100] These A-IoT devices use backscattering as described above to transmit uplink data. These devices do not have an active transmitter for active transmission, but only a backscattering transmitter. Therefore, when these terminals transmit data, a network device needs to provide a carrier wave, and the terminal devices perform backscattering based on this carrier wave to achieve data transmission.

[0101] 2) A-IoT devices based on active transmitters

[0102] These types of A-IoT devices use active transmitters with active transmission capabilities for uplink data transmission. Therefore, when sending data, these A-IoT devices can use their own active transmitters to send data without requiring a carrier wave from network equipment. Suitable active transmitters for A-IoT devices include, for example, ultra-low-power ASK or ultra-low-power FSK transmitters. Based on current implementations, these transmitters can reduce overall power consumption to 400–600 µW when transmitting a 100 µW signal.

[0103] 3) A-IoT devices that simultaneously possess backscatter and active transmitter capabilities

[0104] These terminals can support both backscatter and active transmitters. The terminal can determine which uplink signal transmission method to use based on different conditions (such as battery level and available ambient energy) or the scheduling of network devices: whether to use backscatter or active transmitter for active transmission.

[0105] Cellular Passive Internet of Things

[0106] Cellular IoT is booming, with standardized IoT technologies such as NB-IoT, MTC, and RedCap. However, many IoT communication needs in various scenarios remain unmet, for example:

[0107] - Harsh communication environment

[0108] Some IoT scenarios may face extreme environments such as high temperatures, extremely low temperatures, high humidity, high pressure, high radiation, or high-speed movement. Examples include ultra-high-voltage substations, high-speed train track monitoring, environmental monitoring in frigid regions, and industrial production lines. In these scenarios, existing IoT terminals will be unable to function due to the limitations of conventional power supplies. Furthermore, extreme working environments are also detrimental to IoT maintenance, such as battery replacement.

[0109] - Minimal size terminal form factor requirements

[0110] In certain IoT communication scenarios, such as food traceability, commodity distribution, and smart wearables, terminals require extremely small sizes for convenient use in these environments. For example, IoT terminals used for commodity management in the distribution process typically use electronic tags, embedded in very small packages. Furthermore, lightweight wearable devices can enhance the user experience while meeting user needs.

[0111] - Extremely low-cost IoT communication needs

[0112] Numerous IoT communication scenarios require IoT terminals to be sufficiently inexpensive to enhance their competitiveness compared to other alternative technologies. For example, in logistics or warehousing scenarios, to facilitate the management of large quantities of goods in circulation, IoT terminals can be attached to each item, enabling precise management of the entire logistics process and lifecycle through communication between the terminal and the logistics network. These scenarios necessitate that IoT terminals be priced competitively.

[0113] Therefore, in order to cover these unmet IoT communication needs, it is also necessary to develop ultra-low cost, extremely small size, battery-free / maintenance-free IoT in cellular networks, and environmental energy IoT can meet this need.

[0114] In standardization discussions, ambient energy IoT can also be referred to as zero-power IoT or passive IoT. An ambient IoT device refers to an IoT device that uses various forms of environmental energy, such as radio frequency energy, light energy, solar energy, thermal energy, and mechanical energy, to power itself. Such a device may have no energy storage capacity or very limited energy storage capacity (e.g., using a capacitor with a capacitance of tens of microseconds). Compared to existing IoT devices, ambient IoT devices offer numerous advantages, including no need for conventional batteries, no maintenance, small size, low complexity and low cost, and long lifespan.

[0115] Ambient IoT can be used in at least the following four scenarios:

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

[0117] Environmental monitoring, such as monitoring of temperature, humidity, and harmful gases in the work environment and natural environment;

[0118] Location services, such as indoor positioning, smart item finding, and production line item positioning;

[0119] Intelligent control, such as the intelligent control of various electrical appliances in smart homes (turning on and off air conditioners, adjusting temperature), and the intelligent control of various facilities in agricultural greenhouses (automatic irrigation, fertilization).

[0120] As mentioned above, A-IoT systems not only need to consider communication between the AP and A-IoT devices, but may also involve power supply nodes and carrier nodes. When the AP, power supply nodes, and carrier nodes are distributed across different devices, coordinating AMP communication with power supply and carrier nodes to ensure communication becomes a problem. Continuously sending power supply and carrier signals can lead to long-term occupation of wireless channels, affecting other communications and increasing device power consumption. Therefore, on-demand or AP-based scheduling methods need to be considered.

[0121] Related technologies include several possible PPDU designs, as shown in Figure 12:

[0122] Figure 12a shows PPDU format 1: containing Wi-Fi preamble and energizer symbols, used for charging-only scenarios.

[0123] Figure 12b shows PPDU format 2: It includes Wifi-preamble, AMP Sync, and control signaling parts, used to send control signaling to A-IoT devices without feedback.

[0124] PPDU format 3 shown in 12c of Figure 12 includes Wifi-preamble, AMP Sync, control signaling section and power supply section, used to send control signaling to A-IoT devices and require them to respond immediately in the power supply section.

[0125] Among them, the AP sends energizer symbols, which means that the AP has the function of providing power.

[0126] To facilitate understanding of the technical solutions of the embodiments of this application, the technical solutions of this application are described in detail below through specific embodiments. The above-mentioned related technologies are optional solutions and can be arbitrarily combined with the technical solutions of the embodiments of this application, all of which fall within the protection scope of the embodiments of this application. The embodiments of this application include at least some of the following contents.

[0127] Figure 13 illustrates a wireless communication method provided in an embodiment of this application, which may 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 to schedule the transmission of a power supply signal and / or a carrier signal; the power supply signal is used for radio frequency energy harvesting for the terminal device, and the carrier signal is used for backscatter communication by the terminal device. In this embodiment, the first node may be a node independent of the network device and the terminal device. The network device may be an AP or a reader or interrogator, and the terminal device may be a site or an A-IoT device. The first node has the function of sending a power supply signal and / or a carrier signal to the terminal device. The power supply signal can be understood as a wireless power signal or energy symbols, which can provide energy to 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. The signal transmitted by the terminal device in backscatter communication can be called a backscatter signal, and the backscatter signal is used to send uplink transmission to the network device.

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

[0130] In some embodiments, the power supply signal sent by the first node may include a preamble (optional) and a power supply portion, wherein the power supply portion serves as the actual power supply signal portion to provide power to the terminal device.

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

[0132] In this embodiment of the application, the terminal device receives a power supply signal and / or a carrier signal. The terminal device performs radio frequency energy harvesting, i.e., wireless charging, based on the received power supply signal to obtain energy, and / or the terminal device modulates the received carrier signal to perform backscatter communication.

[0133] Understandably, terminal devices within the coverage area of ​​the first node receive power signals and / or carrier signals.

[0134] In this embodiment of the application, the coverage area of ​​the network device may include one or more first nodes, and all or some of the first nodes in the coverage area of ​​the network device send power supply signals and / or carrier signals based on first information.

[0135] In this embodiment, the network device sends first information to the first node to schedule the first node to transmit power signals and / or carrier signals. When the network device does not provide power signals and / or carrier signals, that is, when there are power nodes and / or carrier nodes independent of the network device that provide power signals and / or carrier signals, the power supply and carrier of AMP communication are coordinated, thereby flexibly scheduling carrier signals and / or power signals and avoiding unnecessary signal overhead and interference.

[0136] In some embodiments, the first node includes a first device and / or a second device, the first device being used to transmit the power supply signal and the second device being used to transmit the carrier signal.

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

[0138] In one example, the first node is the second device, namely CWN or carrier node. Correspondingly, the first information is used to schedule the transmission of carrier signals. At this time, the terminal device sends backscattered signals to the network device, or the WPT used to send power signals is integrated with the network device in one device, that is, the network device integrates the function of sending power signals.

[0139] In one example, the first node includes a first device and a second device, i.e., the first node integrates the functions of transmitting power supply signals and transmitting carrier signals. Accordingly, the first information is used to schedule the transmission of power supply signals and / or carrier signals.

[0140] In some embodiments, the first information includes first scheduling information and / or second scheduling information, wherein the first scheduling information is used to schedule the transmission of the power supply signal, and the second scheduling information is used to schedule the transmission of the carrier signal.

[0141] The first scheduling information is used to schedule the first device to send a power supply signal.

[0142] The second scheduling information is used to schedule the second device to transmit carrier signals.

[0143] In this embodiment of the application, the coverage area of ​​the network device may include multiple first nodes, and the functions of different first nodes are different. Each first node sends a signal to perform the corresponding function based on the received first information.

[0144] In one example, for the first node of WPT, if the first information includes the first scheduling information, the first node sends a power supply signal based on the first scheduling information.

[0145] In one example, for a first node in a CWN, if the first information includes second scheduling information, the first node transmits carrier signals based on the second scheduling information.

[0146] In one example, for a first node acting as both WPT and CWN, if the first information includes first scheduling information and / or second scheduling information, the first node transmits power signals and / or carrier signals based on the first scheduling information and / or second scheduling information.

[0147] Power supply nodes, carrier nodes, and network devices may be integrated into the same device or distributed across different devices, communicating via wired or wireless means. Distributing them across different devices reduces the complexity and cost of individual devices and allows for flexible deployment based on different functions. For example, the power supply range may only be a few meters, while the network device's communication range is much longer, in which case multiple power supply nodes may need to be deployed within the network device's coverage area. The wireless communication method provided in this application can address scenarios where power supply nodes, carrier nodes, and network devices are distributed across different devices, thereby meeting the coverage requirements for a large communication range of the network device.

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

[0149] Device information, wherein the device information is used to indicate one or more of the following: a first device and / or a second device, the terminal device, wherein the first device is used to transmit the power supply signal, and the second device is used to transmit the carrier signal:

[0150] Time information, which is used to indicate the transmission time of the power supply signal and / or the carrier signal;

[0151] First indication information, the first indication information is used to indicate enabling or de-enabling the transmission of the power signal and / or the carrier signal.

[0152] Understandably, the first information includes one or more of the following: device information, time information, and first indication information.

[0153] Device information can be understood as indicating devices that send power signals and / or send carrier signals, as well as terminal devices that need to obtain power and / or perform backscatter communication.

[0154] In this embodiment of the application, the device information is optional. If the first information does not include device information, the first device that sends the power supply signal and / or the second device that sends the carrier signal, as well as the terminal device that needs to obtain energy and / or perform backscatter communication, can be determined based on the information related to the power supply signal and / or carrier signal in the first information.

[0155] The device information may include first identification information to indicate a first device. The first device indicated by the device information can be understood as a specific WPT (Wide Point Device) within the coverage area of ​​the network device, i.e., a target WPT, used to transmit a power signal. Accordingly, the first device corresponding to the first identification information transmits a power signal, while other first devices within the coverage area of ​​the network device do not transmit power signals.

[0156] In one example, the first identification information could be the WPT's ID information.

[0157] Understandably, if the device information does not include the first identification information, but the first information includes other information related to the power supply signal, then it can be assumed that all first devices within the coverage area of ​​the network device will send power supply signals, and correspondingly, all first devices within the coverage area of ​​the network device will send power supply signals; if the first information does not include other information related to the power supply signal, then it can be assumed that no first device will be scheduled to send power supply signals, and correspondingly, no first device within the coverage area of ​​the network device will send power supply signals.

[0158] The device information may include second identification information to indicate a second device. The second device indicated by the device information can be understood as a specific CWN (Center for Warp and Waves) within the coverage area of ​​the network device, i.e., a target CWN. Accordingly, the second device corresponding to the second identification information transmits the carrier signal, while other second devices within the coverage area of ​​the network device do not transmit carrier signals.

[0159] In one example, the second identification information could be the CWN's ID information.

[0160] Understandably, if the first information includes other information related to the carrier signal and the device information does not include the second identification information, it can be assumed that all second devices within the coverage area of ​​the network device will send carrier signals. Accordingly, all second devices within the coverage area of ​​the network device will send carrier signals. If the first information does not include other information related to the power supply signal, it can be assumed that no second device will send carrier signals. Accordingly, no second device within the coverage area of ​​the network device will send carrier signals.

[0161] The device information may include third identification information to indicate a terminal device. The terminal device indicated by the device information can be understood as a specific terminal device that needs to receive a power supply signal and / or a carrier signal, i.e., a target terminal device. The first device indicated by the first identification information and / or the second device indicated by the second identification information determine, based on the third identification information, whether the target terminal device is within the coverage area of ​​the target WPT and / or the target CWN. If the target terminal device is within the coverage area of ​​the target WPT and / or the target CWN, the target WPT sends a power supply signal and / or the target CWN sends a carrier signal, so that the target terminal device receives the power supply signal and / or the carrier signal.

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

[0163] Understandably, when the device information does not include third-party identification information, the target WPT directly transmits a power supply signal and / or the target CWN directly transmits a carrier signal, enabling terminal devices within the corresponding coverage area to receive the power supply signal and / or the carrier signal. In this case, it can be considered that the terminal device needing to obtain energy and / or perform backscatter communication is not a specific terminal device; terminal devices capable of receiving the power supply signal can obtain energy, and terminal devices capable of receiving the carrier signal can perform backscatter communication.

[0164] Time information can be understood as indicating the duration and location of the power supply signal and / or carrier signal.

[0165] In one example, the timing information may include rate and length for estimating duration, and the starting position of the power signal and / or carrier signal is after the preamble of the PPDU for transmitting the first scheduling information and / or the second scheduling information.

[0166] In one example, time information may include duration and location.

[0167] In this embodiment of the application, time information is optional.

[0168] In one example, the time information in the first information indicates the duration and location of a power supply signal, and / or indicates the duration and location of a carrier signal. In this case, when scheduling a power supply signal and / or a carrier signal, the corresponding first information includes the time information.

[0169] In one example, the time information in the first information indicates the duration and periodic position of the power supply signal, and / or the duration and periodic position of the carrier signal. In this case, if the power supply signal and / or carrier signal have already been scheduled, the time information may not be included in the first information.

[0170] In this embodiment of the application, the duration of the power supply signal may be the same as the duration of the carrier signal, or the duration of the power supply signal may be longer than the duration of the carrier signal.

[0171] Understandably, when the time information indicates the transmission time of the power supply signal and the transmission time of the carrier signal, the transmission time of the power supply signal covers the transmission time of the carrier, that is, the transmission time of the carrier is within the transmission time of the power supply signal.

[0172] The first indication information is used to indicate that enabling starts or de-enabling stops the transmission of the power signal and / or the carrier signal.

[0173] In this embodiment of the application, when device information and / or time information are present, the first information may not include the first indication information. In this case, the transmission of the power supply signal and / or carrier signal is enabled by default.

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

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

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

[0177] Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

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

[0179] The second indication information indicates the frequency band and / or frequency point of the power supply signal and / or carrier signal.

[0180] In one example, the power signal and / or carrier signal are in the 900MHz band and / or at a frequency of 2.4GHz.

[0181] In the embodiments of this application, the frequency band and / or frequency point of the power supply signal may be the same as or different from the frequency band and / or frequency point of the carrier signal.

[0182] The third indication information includes one or more of the following information indicating the power supply signal and / or carrier signal: waveform type information, frequency, duty cycle, and pulse width. The waveform type information may include a sine wave, square wave, etc. In this embodiment, the waveform type of the power supply signal and / or carrier signal is not limited.

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

[0184] The power information indicates the transmission power of the power supply signal and / or the carrier signal. Understandably, the power information is used to indicate the transmission power of the power supply signal and / or the carrier signal.

[0185] In this embodiment of the application, when there is a target WPT and a target terminal device, the transmission power of the power supply signal may be related to the distance between the target WPT and the target terminal device.

[0186] In this embodiment of the application, when there is a target CWN and a target terminal device, the transmission power of the carrier signal may be related to the distance between the target WPT and the target terminal device.

[0187] In this embodiment of the application, the power information may be a power value or a power level that corresponds to the power value.

[0188] Understandably, the information related to the power supply signal included in the first information can be understood as the first scheduling information, such as one or more of the following: first identification information, information in the time information indicating the transmission time of the power supply signal, information in the first indication information indicating whether to enable or disable the transmission of the power supply signal, information in the second indication information indicating the frequency band and / or frequency point of the power supply signal, information in the third indication information indicating the waveform of the power supply signal, and information in the power information indicating the transmission power of the power supply signal. 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: second identification information, information in the time information indicating the transmission time of the carrier signal, information in the first indication information indicating whether to enable or disable the transmission of the carrier signal, information in the second indication information indicating the frequency band and / or frequency point of the carrier signal, information in the third indication information indicating the waveform of the carrier signal, and information in the power information indicating the transmission power of the carrier signal. Understandably, some information, such as the terminal device identification information in the device information, can be considered as both the first and second scheduling information.

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

[0190] The first scheduling information and the second scheduling information being the same can be understood as jointly scheduling the power supply signal and the carrier signal using the same information. For example, network devices treat the power supply signal and the carrier signal as the same signal, or WPT and CWN transmit the power supply signal and the carrier signal based on the same information.

[0191] In one example, the first information includes time information that indicates both the transmission time of the power signal and the transmission time of the carrier signal. This can be understood as the power signal and the carrier signal being transmitted at the same time, i.e., with the same duration and location.

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

[0193] In one 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 power supply signal, and the second time information is used to indicate the transmission time of the carrier signal. This can be understood as the transmission times of the power supply signal and the carrier signal being independent.

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

[0195] The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal;

[0196] The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal;

[0197] Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

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

[0199] The descriptions of the second indication information, third indication information, and power information that may be included in the second information can be found in the descriptions of the second indication information, third indication information, and power information in the first information, and will not be repeated here. The difference between the second indication information, third indication information, and power information included in the second information and those in the first information is that the network device still transmits predefined information.

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

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

[0202] In this embodiment, the first node transmits the power supply signal and / or carrier signal based on information used to schedule the transmission of the power supply signal and / or carrier signal. The information used to schedule the transmission of the power supply signal and / or carrier signal may include first information transmitted by the network device, which may include second indication information, third indication information, and power information. Alternatively, the information used to schedule the transmission of the power supply signal and / or carrier signal may include the first information transmitted by the network device and predefined second information; in this case, the first information transmitted by the network device may not include the second indication information, third indication information, and power information.

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

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

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

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

[0207] Figure 14 illustrates a wireless communication method provided in an embodiment of this application, which may include the following steps:

[0208] S1401, the network device sends one or more first PPDUs, and correspondingly, the first node receives 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 first information. Specifically, when a network device sends one first PPDU, the first PPDU can carry all the first information; when a network device sends multiple first PPDUs, each first PPDU carries a portion of the first information.

[0210] In one example, the first information includes first scheduling information, and the network device sends a first PPDU that carries all the information of the first scheduling information.

[0211] In one example, the first information includes first scheduling information. The network device sends two first PPDUs. One first PPDU carries part of the first scheduling information used to schedule the transmission of power supply signals, and the other first PPDU carries another part of the first scheduling information.

[0212] In one example, the first information includes the second scheduling information, and the network device sends a first PPDU that carries all the information of the second scheduling information.

[0213] In one example, the first information includes second scheduling information. The network device sends two first PPDUs, one of which carries part of the second scheduling information for scheduling the transmission of carrier signals, and the other of which carries another part of the second scheduling information.

[0214] In one example, the first information includes first scheduling information and second scheduling information. The network device sends two first PPDUs, one of which carries first scheduling information for scheduling the transmission of power supply signals, and the other of which carries second scheduling information for scheduling the transmission of carrier signals.

[0215] In one example, the first information includes first scheduling information and second scheduling information. The network device sends two first PPDUs. One first PPDU carries part of the first scheduling information and part of the second scheduling information, and the other first PPDU carries another part of the information used to schedule the first scheduling information and another part of the second scheduling information.

[0216] In this embodiment of the application, a PPDU can be understood as a frame, and its structure can be as shown in Figure 15, including: a preamble, and may also include data and / or AMP downlink transmission, wherein the PPDU can be replaced by a frame or a physical frame, for example: the first PPDU can be replaced by a first frame.

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

[0218] In this embodiment of the application, the combination of fields such as L-STF, L-LTF, L-SIG, mark1, mark2, HE-SIG A1 / A2, etc., which are explicitly separated in the PPDU format except for the narrowband part, is called a preamble or WiFi-preamble. Broadband data can be used after the preamble.

[0219] The preamble and data in the wideband portion can be read by high-performance devices. However, the data in the wideband portion requires decoding to determine its content. The narrowband portion can be read by low-performance devices.

[0220] In one example, as shown in Figure 16, the preamble includes the following fields: L-STF, L-LTF, L-SIG, field 1, field 2, and New SIG. In this embodiment, the structure of the preamble, as shown in Figure 16, is the PPDU transmitted in the A-IoT system.

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

[0222] A preamble, wherein the preamble is located in the wideband portion of the first PPDU;

[0223] The first field is located after the preamble and in the wideband portion of the first PPDU;

[0224] The second field is located in the narrow band portion of the first PPDU.

[0225] In this embodiment of the application, the first information carried by the first PPDU may be carried in one or more fields among the preamble, the first field, and the second field.

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

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

[0228] The second field can be understood as a field used for downlink transmission in the narrowband portion, such as one or more of the AMP Sync field, AMP SIG field, and AMP DL data field. The AMP DL data field can carry data with control information.

[0229] In this embodiment, the method of carrying the first information through three field types—preamble, first field, and second field—can be understood as three different carrying methods: carrying method 1, carrying the first information in the preamble; carrying method 2, carrying the first information in the first field; and carrying method 3, carrying the first information in the second field. For a first PPDU, one or more of these three carrying methods can be used to carry the first information.

[0230] When the first information carried by the first PPDU adopts a certain carrying method, 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] Understandably, different parts of the first scheduling information and / or the second scheduling information are carried in different fields. In this case, the first information carried by the first PPDU adopts multiple carrying methods.

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

[0234] In one example, the first and second identification information in the device information is 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 fields corresponding to the same field type, or in fields corresponding to different field types.

[0236] In this embodiment of the application, the first scheduling information and the second scheduling information may use the same or different carrying methods.

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

[0238] In one example, if the first information includes first scheduling information, the first scheduling information is carried in the preamble; if the first information includes second scheduling information, the second scheduling information is carried in the preamble.

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

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

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

[0242] Understandably, if the first scheduling information and the second scheduling information are carried in fields corresponding to the same field type, and the first information includes the first scheduling information and the second scheduling information, then 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 first scheduling information and second scheduling information, wherein the first scheduling information and the second scheduling information are carried on the same first PPDU, or the first scheduling information and the second scheduling information are carried on different first PPDUs.

[0244] When the first information includes first scheduling information and second scheduling information, the first information is used to schedule the transmission of power supply signals and carrier signals.

[0245] If the first scheduling information and the second scheduling information are carried on the same first PPDU, then the transmission of the power supply signal and the carrier signal is scheduled through the first PPDU.

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

[0247] If the first scheduling information and the second scheduling information are carried on different first PPDUs, then the transmission of the power supply signal and the carrier signal is scheduled through independent, i.e., different first PPDUs.

[0248] In one example, as shown in Figure 18, one PPDU is used to schedule the WPT to transmit the power 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 on different first PPDUs, and the information carried by the preamble of the first PPDU carrying the first scheduling information is different from the information carried by the preamble of the first PPDU carrying the second scheduling information.

[0250] When the first scheduling information and the second scheduling information are carried on different first PPDUs, the first PPDU carrying the first scheduling information and the second scheduling information are identified based on the difference in the information carried by the preamble of the two first PPDUs. That is, the first PPDU that schedules the transmission of the power supply signal and the first PPDU that schedules the transmission of the carrier signal are identified.

[0251] If the first node includes a first device and a second device, the first node receives two first PPDUs and transmits power signals and carrier signals based on the two first PPDUs.

[0252] In some embodiments, the first node is a 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 two first PPDUs, sends a power supply 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 a 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 two first PPDUs, transmits carrier signals based on the first PPDUs carrying second scheduling information, and ignores the first PPDUs carrying first scheduling information.

[0256] In some embodiments, the first scheduling information and the second scheduling information are carried on 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] When 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 can be carried in the preamble of the first PPDU. Another example is that the first scheduling information and the second scheduling information can be carried in the first field of the first PPDU. Yet another example is that the first scheduling information and the second scheduling information can be carried in the preamble and the second field of the first PPDU.

[0258] Understandably, the first scheduling information and the second scheduling information can be carried in the same field of the first PPDU. The first scheduling information and the second scheduling information can be the same information or different information. That is, the power supply signal and the carrier signal can be considered as the same signal for scheduling, or they can be considered as different signals for separate scheduling.

[0259] When 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 can be carried in the preamble of the first PPDU, and the second scheduling information can be carried in the first field of the first PPDU. Another example is that the first scheduling information can be carried in the first field of the first PPDU, and the second scheduling information can be carried in the second field of the first PPDU.

[0260] In some embodiments, where one or more fields carrying the first information are located in the broadband portion of the first PPDU, the first PPDU may or may not include a narrowband portion.

[0261] In this embodiment of the application, if a field carrying first information in a first PPDU includes a second field, then the first PPDU includes a narrowband portion. If a field carrying first information in a first PPDU is located in the wideband portion of the first PPDU, i.e., does not include the second field, the first PPDU may or may not include a narrowband portion.

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

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

[0264] In this embodiment of the application, the narrowband portion of the first PPDU can be received by the terminal device, and some or all of the first PPDUs sent by the network device can be received by the terminal device, enabling information to be transmitted to the terminal device based on the first PPDU.

[0265] In some embodiments, the narrowband portion of the first PPDU is used for downlink transmission and / or to instruct the terminal device to send uplink transmission.

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

[0267] When the narrowband portion of the first PPDU is used to instruct the terminal device to send uplink transmissions, the uplink transmissions sent by the terminal device can be understood as AMP uplink transmissions. The AMP uplink transmissions may include AMP uplink data and may also include AMP uplink synchronization and AMP uplink signaling. The AMP uplink synchronization is used for uplink synchronization, and the AMP uplink signaling is used to instruct the transmission of AMP uplink data, so that the network device receives the AMP uplink data.

[0268] In this embodiment of the application, the narrowband portion of the first PPDU can be used for downlink transmission and / or downlink transmission between the terminal device and the network device, thereby improving the reliability of interaction between the terminal device and the network device.

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

[0270] In this embodiment of the application, when the first information includes the second scheduling information, some or all of the PPDUs in one or more first PPDUs sent by the network device include narrowband portions.

[0271] Here, when the network device schedules the transmission of the carrier signal based on the first information, it synchronously instructs the terminal device to transmit uplink based on the narrowband portion of the transmitted first PPDU, thereby aligning the transmission of the carrier signal with the transmission of the uplink of the terminal device and providing the carrier signal for the uplink transmission of the terminal device in a timely manner.

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

[0273] The network device sends a second PPDU, the narrowband portion of which is used for downlink transmission and / or to instruct the terminal device to send uplink transmission.

[0274] As shown in Figure 20, the network device sends one or more first PPDUs and one second PPDU, and correspondingly, the first node receives one or more first PPDUs and one second PPDU. The one or more first PPDUs are used to carry first information, and the second PPDU is used by the terminal device to receive downlink transmissions and / or send uplink transmissions. The narrowband portion of the second PPDU is used for downlink transmissions and / or instructing the terminal device to send uplink transmissions, i.e., for the terminal device to receive downlink transmissions and / or send uplink transmissions. For a description of the narrowband portion of the second PPDU, please refer to the description of the narrowband portion of the first PPDU used for downlink transmissions and / or instructing the terminal device to send uplink transmissions; it will not be repeated here.

[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] When a network device sends a first PPDU and a second PPDU, the first PPDU and the second PPDU are identified based on the difference between the information carried in the preamble of the first PPDU and the information carried in the preamble of the second PPDU.

[0277] In this embodiment, for WPT and / or CWN, upon receiving the first PPDU and the second PPDU, the power supply signal and / or carrier signal are transmitted based on the scheduling of the first PPDU, and the second PPDU is ignored. For the terminal device, upon receiving the first PPDU and the second PPDU, the AMP downlink transmission is received and / or the AMP uplink transmission is transmitted based on the second PPDU, and the first PPDU is ignored.

[0278] In this embodiment of the application, the narrowband portion used for downlink transmission and / or instructing the terminal device to send uplink transmission can be a narrowband portion of a first PPDU or a narrowband portion of a second PPDU. The PPDU containing the narrowband portion used to instruct the terminal device to receive downlink transmission and / or send uplink transmission can be one of one or more first PPDUs that schedule first information, or it can be another second PPDU.

[0279] In one example, a network device broadcasts a first PPDU, which is used to schedule the transmission of a carrier signal and has a narrowband portion used to indicate downlink transmission and / or instruct the terminal device to send uplink transmission. Then, a second device sends a 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 one example, a network device broadcasts a first PPDU and a second PPDU. The first PPDU is used to schedule the transmission of a carrier signal, and the narrowband portion of the second PPDU is used to indicate downlink transmission and / or indicate that the terminal device is sending uplink transmission. The second device then transmits a carrier signal based on the first PPDU, and the terminal device receives downlink transmission and / or sends uplink transmission based on the second PPDU.

[0281] In one example, a network device broadcasts two first PPDUs and one second PPDU. One first PPDU is used to schedule the transmission of a power signal, and another first PPDU is used to schedule the transmission of a carrier signal. The narrowband portion of the second PPDU is used to indicate downlink transmission and / or indicate that the terminal device is sending uplink transmission. The first device sends a power signal based on the first PPDU that schedules the power signal, the second device sends a carrier signal based on the first PPDU that schedules the carrier signal, and the terminal device receives downlink transmission and / or sends uplink transmission based on the second PPDU.

[0282] The wireless communication method provided in this application will now be described through several embodiments.

[0283] This application embodiment provides a method for scheduling a Power Supply Node (WPT) to transmit a power supply signal and / or a Carrier Node to transmit a carrier signal. This scheduling information, i.e., the first information, is sent by the Access Point (AP).

[0284] The scheduling information includes the following:

[0285] The device's ID information, such as the ID information of the target power supply node or carrier node, or the ID information of the target A-IoT device, is used by the power supply node or carrier node to determine whether it is within its coverage area, and thus decide whether to send a power supply signal / carrier signal in response to the scheduling information.

[0286] Duration and / or location: The duration can be calculated directly using Rate and Length from L-SIG, starting after WiFi-Preamble; or additional fields can be added to describe the location and duration of the power signal and / or carrier signal.

[0287] Optionally, the duration of the power supply signal may be the same as the duration of the carrier signal; or, the duration of the power supply signal may be longer than the duration of the carrier signal (the carrier signal only needs to cover the AMP UL data portion, while the power supply signal needs to be longer to continuously charge / power the A-IoT device).

[0288] The frequency point / band of the power supply signal and / or carrier signal (e.g., in the 900MHz band, 2.4GHz frequency point);

[0289] The waveform of the power supply signal and / or carrier signal (e.g., sine wave or square wave, sine wave frequency, square wave duty cycle and pulse width, etc.);

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

[0291] If the standard determines that some of the above information is a predefined or fixed value, such as the power supply signal being fixed as a sine wave, or the frequency being fixed at 900MHz, then the dispatch instruction may not include this information.

[0292] The scheduling information can be carried through the SIG field, Mark field, and / or other newly added fields in the WiFi-preamble, or in the data following the WiFi-preamble, or in the AMP-Sync / AMP-Sig field. Because the power supply node or carrier node has strong capabilities, it can directly read the broadband WiFi-preamble and data information.

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

[0294] Optionally, the power supply signal and the carrier signal may be used separately, or they may coexist.

[0295] Optionally, the fields for the power supply signal and the fields for the carrier signal can share the same fields, or the fields for the power supply signal and the carrier signal can use two different sets of fields. For example:

[0296] Same fields: ID of the target A-IoT device + duration / location. When the power supply node and carrier node determine that the target A-IoT device is within range based on its ID, they will send power supply signals and carrier signals according to the subsequent duration / location indication information.

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

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

[0299] Example 1: Only scheduling power supply signals

[0300] Example 1 considers scenario 1, where the AP only needs to schedule the power supply node WPT to send a power supply signal, which is suitable for the STA to charge but not send UL data; or the case where the carrier node and AP are integrated in one device (no scheduling signaling is required, implemented internally by the AP); or the case where the carrier node and WPT are integrated in one device (WPT sends power supply signal and carrier signal simultaneously according to a scheduling information, and can even regard power supply signal and carrier signal as the same signal).

[0301] In scenario 1, the examples may include, but are not limited to, Figures 21A to 21H.

[0302] In Figure 21A, only the power supply signal is scheduled, using WiFi-preamble scheduling.

[0303] In Figure 21B, only the power supply signal is scheduled, using broadband data scheduling.

[0304] In Figure 21C, the power supply signal and AMP data are scheduled using WiFi-preamble.

[0305] In Figure 21D, the power supply signal and AMP data are scheduled using broadband data scheduling.

[0306] In Figure 21E, power supply signals and AMP data are scheduled. These are carried through different physical frames. The first frame, WiFi-preamble 1, primarily schedules the power supply signal, while the second frame, WiFi-preamble 2, primarily schedules the AMP data. The SIG / field1 / field2 / New SIG fields of these two frames may not be identical, used to distinguish different physical frame types. Because the AP cannot accurately predict when it will be able to acquire the channel in the second frame when sending the first frame, the scheduled power supply signal needs to be within a relatively long time window to ensure that the A-IoT device can acquire sufficient power.

[0307] In Figure 21F, scheduling power signals and AMP data are carried out. These are carried in different physical frames. Similar to Figure 21E, the difference is that the scheduling information is carried in the broadband data.

[0308] In Figure 21G, the scheduling power signal and AMP data are shown. Part of the scheduling power signal information can be carried via WiFi-preamble; another part can be carried via narrowband AMP SIG.

[0309] In Figure 21H, the scheduling power supply signal and AMP data are shown. Part of the information in the scheduling power supply signal can be carried using broadband data; the other part can be carried using narrowband AMP Sync.

[0310] It should be noted that some information regarding the power supply signal can be carried through broadband SIG / field1 / field2 or broadband data; other information (such as time information) can be carried through narrowband AMP Sync / SIG / DL data. For example, the broadband part instructs the WPT to send a power supply signal (open signaling); the narrowband part, such as the AMP SYNC / SIG field, also needs to inform the A-IoT device of the length of the DL data it needs to receive. The WPT can use this indication to determine the end time of the power supply signal transmission. Here, the WPT is required to be able to decode both broadband and narrowband signals simultaneously.

[0311] Example 2: Scheduling only the carrier signal

[0312] Example 2 considers scenario 2, where the AP only needs to schedule the carrier node to send the carrier signal. This is suitable for situations where the STA uses backscattering to send UL data, and the carrier node and AP are independent nodes; or where the power supply node is integrated with the AP in one device (no need to schedule the power supply signal, implemented internally by the AP); or where the carrier node and WPT are integrated in one device (the WPT simultaneously sends the power supply signal and carrier signal according to a scheduling information, and can even treat the power supply signal and carrier signal as the same signal).

[0313] In scenario 2, the scenarios may include, but are not limited to, Figures 22A to 22F.

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

[0315] In Figure 22B, the carrier signal and AMP data are scheduled, with the carrier signal scheduled using wideband data.

[0316] In Figure 22C, the power supply signal and AMP data are scheduled using WiFi-preamble to schedule the carrier signal. The carrier signal and AMP data are carried through different physical frames. Specifically, 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 these two frames may not be completely identical, used to distinguish between different physical frame types.

[0317] In Figure 22D, the scheduling power signal and AMP data are used, with the scheduling carrier signal carried in a wideband data format. The scheduling carrier signal and the scheduling AMP data are carried in different physical frames. Similar to Figure 22C, the information of the scheduling carrier signal is carried in the wideband data portion.

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

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

[0320] In practical applications, when scheduling power supply signals and AMP data, all information regarding the scheduling carrier signal and AMP data is carried through narrowband AMP Sync / SIG / DL data. Since the narrowband downlink Sync / SIG / DL data with control contains the UL information to be transmitted by the scheduled A-IoT device, CWN can use this indication information to determine the timing of carrier signal transmission, ensuring that the transmitted carrier signal can include AMP uplink transmission.

[0321] When the narrowband portion carries information about the scheduling carrier signal, the CWN is required to simultaneously decode both wideband and narrowband signals. An AMP SIG field may exist between the AMP Sync and DL data in the narrowband signal portion.

[0322] In Embodiment 2, the narrowband portion, such as the AMP SYNC / SIG domain, also needs to notify the A-IOT device of the length of the UL data to be sent. CWN can use this indication information to determine the time of carrier signal transmission, ensuring that the transmitted carrier signal can include the AMP uplink transmission.

[0323] Example 3: Dispatch of power supply signals and carrier signals

[0324] Example 3 considers scenario 3, where the AP only needs to simultaneously schedule the carrier node CWN to send the carrier signal and the power node WPT to send the power signal. This is suitable for the STA to use backscatter to send UL data, and the carrier node, power node and AP are all independent nodes.

[0325] In scenario 3, the scenarios may include, but are not limited to, Figures 23A to 23D.

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

[0327] In Figure 23B, the power supply signal, carrier signal, and AMP data are scheduled, and the power supply signal and carrier signal are scheduled using broadband data.

[0328] In Figure 23C, the power supply signal, carrier signal, and AMP data are scheduled. The power supply signal and carrier signal are scheduled using WiFi-preamble. The scheduling of the carrier signal and the power supply signal are carried through different physical frames, while the information for scheduling the AMP data can be carried in one of the physical frames. Specifically, WiFi-preamble 1 in the first frame is used to schedule the power supply signal, and WiFi-preamble 2 in the second frame schedules the carrier signal and AMP data. The SIG / field1 / field2 / New SIG fields of these two frames may not be exactly the same, which is used to distinguish between different physical frame types.

[0329] In Figure 23D, the power supply signal, carrier signal, and AMP data are scheduled, with the power supply signal and carrier signal scheduled using wideband data. The scheduling carrier signal and the scheduling power supply signal are carried through different physical frames, while the information for scheduling AMP data can be carried in one of the physical frames.

[0330] In Figure 23E, the power supply signal, carrier signal, and AMP data are scheduled. The power supply signal is scheduled using WiFi-preamble, and the carrier signal is scheduled using broadband data. The scheduling carrier signal, power supply signal, and AMP data are carried through different physical frames. Specifically, the preamble in the physical frame for scheduling the power supply signal is preamble 1, the preamble in the physical frame for scheduling the carrier signal is preamble 2, and the preamble in the physical frame for scheduling the AMP data is preamble 3.

[0331] In this embodiment of the application, when the power supply signal, carrier signal, and AMP data shown in Figure 23E are scheduled through different physical frames, the data field of the wideband portion 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. However, the way the first and second scheduling information are carried is not limited to the situation shown in Figure 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 portion of the physical frame scheduling the carrier signal carries the second scheduling information; another example is that the narrowband portion of the physical frame scheduling the power supply signal carries the first scheduling information, and the narrowband portion of the physical frame scheduling the carrier signal carries the second scheduling information; yet another example is that the preamble of the physical frame scheduling the power supply signal carries the first scheduling information, and the narrowband portion of the physical frame scheduling the carrier signal carries the second scheduling information. The narrowband portion of the physical frame scheduling the AMP data carries the downlink transmission of the AMP data.

[0332] It should be noted that, in this embodiment of the application, the AMP UL transmission of A-IoT includes AMP UL sync (optionally), AMP UL SIG (optionally), and AMP UL data. In some cases, the A-IoT device may add a Sync for uplink synchronization or a SIG for indicating partial information before sending UL data. However, regardless of the type of UL signal or channel sent by the A-IoT device, it needs to rely on a carrier signal and modulate it based on the carrier signal.

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

[0334] 1) The AP sends scheduling information to schedule carrier nodes and / or power supply nodes. The scheduling information includes the device ID, duration and location, frequency band, waveform and transmission power of the carrier signal and / or power supply signal.

[0335] 2) The scheduling information can be carried through broadband SIG domains, newly added domains, broadband data payloads, etc., or through narrowband AMP DL sync, AMP SIG, etc.

[0336] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solutions of this application, and these simple modifications all fall within the protection scope of this application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not describe the various possible combinations separately. Furthermore, various different embodiments of this application can also be arbitrarily combined, as long as they do not violate the spirit of this application, they should also be considered as the content disclosed in this application. Moreover, without conflict, the various embodiments and / or the technical features in the various embodiments described in this application can be arbitrarily combined with the prior art, and the resulting technical solutions should also fall within the protection scope of this application.

[0337] It should also be understood that in the various method embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. Furthermore, in the embodiments of this application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data. "Downlink" indicates that the transmission direction of signals or data is a first direction from the site to the user equipment in the cell; "uplink" indicates that the transmission direction of signals or data is a second direction from the user equipment in the cell to the site; and "sidelink" indicates that the transmission direction of signals or data is a third direction from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. Additionally, in the embodiments of this application, the term "and / or" is merely a description of the association relationship between related objects, indicating that three relationships can exist. Specifically, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0338] Figure 24 is a schematic diagram of the structural composition of a network device provided in an embodiment of this application. As shown in Figure 24, the network device 2400 includes:

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

[0340] In some embodiments, the first information includes the first scheduling information and / or the second scheduling information, wherein the first scheduling information is used to schedule the transmission of the power supply signal, and the second scheduling information is used to schedule the transmission of the carrier signal.

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

[0342] Device information, wherein the device information is used to indicate one or more of the following: a first device and / or a second device, the terminal device, wherein the first device is used to transmit the power supply signal, and the second device is used to transmit the carrier signal:

[0343] Time information, which is used to indicate the transmission time of the power supply signal and / or the carrier signal;

[0344] First indication information, the first indication information is used to indicate enabling or de-enabling the transmission of the power signal and / or the carrier signal.

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

[0346] The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal;

[0347] The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal;

[0348] Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

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

[0350] In some embodiments, the information for scheduling the transmission of the power supply signal and / or carrier signal further includes predefined second information, which includes one or more of the following:

[0351] The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal;

[0352] The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal;

[0353] Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

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

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

[0356] A preamble, wherein the preamble is located in the wideband portion of the first PPDU;

[0357] The first field is located after the preamble and in the wideband portion of the first PPDU;

[0358] The second field is located in the narrow band portion 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, wherein the first scheduling information and the second scheduling information are carried on the same first PPDU, or the first scheduling information and the second scheduling information are carried on different first PPDUs.

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

[0363] In some embodiments, the first scheduling information and the second scheduling information are carried on 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.

[0364] In some embodiments, where one or more fields carrying the first information are located in the broadband portion of the first PPDU, the first PPDU may or may not include a narrowband portion.

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

[0366] In some embodiments, the narrowband portion of the first PPDU is used for downlink transmission and / or to instruct the terminal device to send uplink transmission.

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

[0368] In some embodiments, the first communication unit 2401 is further configured to transmit a second PPDU, the narrowband portion of which is used for downlink transmission and / or to instruct the terminal device to transmit 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 a network device can be implemented by a transceiver in the network device.

[0371] Figure 25 is a schematic diagram of the structural composition of the first node provided in an embodiment of this application. As shown in Figure 25, the first node 2500 includes:

[0372] The second communication unit 2501 is configured to receive first information, which is used to schedule the transmission of a power supply signal and / or a carrier signal; the power supply signal is used for radio frequency energy harvesting for the terminal device, and the carrier signal is used for backscatter communication for the terminal device.

[0373] In some embodiments, the first node includes a first device and / or a second device, the first device being used to transmit the power supply signal and the second device being used to transmit the carrier signal.

[0374] In some embodiments, the first information includes the first scheduling information and / or the second scheduling information, wherein the first scheduling information is used to schedule the transmission of the power supply signal, and the second scheduling information is used to schedule the transmission of the carrier signal.

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

[0376] Device information, wherein the device information is used to indicate one or more of the following: a first device and / or a second device, the terminal device, wherein the first device is used to transmit the power supply signal, and the second device is used to transmit the carrier signal:

[0377] Time information, which is used to indicate the transmission time of the power supply signal and / or the carrier signal;

[0378] First indication information, the first indication information is used to indicate enabling or de-enabling the transmission of the power signal and / or the carrier signal.

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

[0380] The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal;

[0381] The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal;

[0382] Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

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

[0384] In some embodiments, the information for scheduling the transmission of the power supply signal and / or carrier signal further includes predefined second information, which includes one or more of the following:

[0385] The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal;

[0386] The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal;

[0387] Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

[0388] In some embodiments, the second communication unit 2502 is further configured to transmit the power supply signal and / or the carrier signal based on the information for scheduling the transmission of the power 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, the first PPDU carries the first information in one or more of the following fields:

[0391] A preamble, wherein the preamble is located in the wideband portion of the first PPDU;

[0392] The first field is located after the preamble and in the wideband portion of the first PPDU;

[0393] The second field is located in the narrow band portion 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 the 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, wherein the first scheduling information and the second scheduling information are carried on the same first PPDU, or the first scheduling information and the second scheduling information are carried on different first PPDUs.

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

[0401] In some embodiments, where one or more fields carrying the first information are located in the broadband portion of the first PPDU, the first PPDU may or may not include a narrowband portion.

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

[0403] In some embodiments, the narrowband portion of the first PPDU is used for downlink transmission and / or to instruct 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 the transceiver in the first node. The first control unit and the second control unit in the first node can be implemented by the processor in the first node.

[0406] Those skilled in the art should understand that the descriptions of the network devices or first nodes in the embodiments of this application can be understood with reference to the descriptions of the wireless communication methods in the embodiments of this application.

[0407] Figure 26 is a schematic structural diagram of a communication device 2600 provided in an embodiment of this application. This communication device can be a network device or a first node. The communication device 2600 shown in Figure 26 includes a processor 2610, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0408] Optionally, as shown in FIG26, the communication device 2600 may further include a memory 2620. The processor 2610 may retrieve and run computer programs from the memory 2620 to implement the methods in the embodiments of this application.

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

[0410] Optionally, as shown in FIG26, the communication device 2600 may further include a transceiver 2630, and the processor 2610 may control the transceiver 2630 to communicate with other devices. Specifically, it may send information or data to other devices or receive information or data sent by other devices.

[0411] The transceiver 2630 may include a transmitter and a receiver. The transceiver 2630 may further include an antenna, which may be one or more.

[0412] Optionally, the communication device 2600 may specifically be a network device in the embodiments of this application, and the communication device 2600 may implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0413] Optionally, the communication device 2600 may specifically be the first node in the embodiments of this application, and the communication device 2600 may implement the corresponding processes implemented by the first node in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0414] Figure 27 is a schematic structural diagram of a chip according to an embodiment of this application. The chip 2700 shown in Figure 27 includes a processor 2710, which can call and run computer programs from memory to implement the methods in the embodiments of this application.

[0415] Optionally, as shown in FIG27, chip 2700 may further include memory 2720. Processor 2710 can call and run computer programs from memory 2720 to implement the methods in the embodiments of this application.

[0416] The memory 2720 can be a separate device independent of the processor 2710, or it can be integrated into the processor 2710.

[0417] Optionally, the chip 2700 may also include an input interface 2730. The processor 2710 can control the input interface 2730 to communicate with other devices or chips; specifically, it can acquire information or data sent by other devices or chips.

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

[0419] Optionally, the chip can be applied to the network device in the embodiments of this application, and the chip can implement the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0420] Optionally, the chip can be applied to the first node in the embodiments of this application, and the chip can implement the corresponding processes implemented by the first node in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

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

[0422] Figure 28 is a schematic block diagram of a communication system 2800 provided in an embodiment of this application. As shown in Figure 28, the communication system 2800 includes a network device 2810 and a first node 2820.

[0423] The network device 2810 can be used to implement the corresponding functions implemented by the network device in the above method, and the first node 2820 can be used to implement the corresponding functions implemented by the first node in the above method. For the sake of brevity, these will not be elaborated here.

[0424] It should be understood that the processor in the embodiments of this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0425] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0426] It should be understood that the above-described memory is exemplary and not a limiting description. For example, the memory in the embodiments of this application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DR RAM), etc. That is to say, the memory in the embodiments of this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0427] This application also provides a computer-readable storage medium for storing computer programs.

[0428] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0429] Optionally, the computer-readable storage medium can be applied to the first node in the embodiments of this application, and the computer program causes the computer to execute the corresponding processes implemented by the first node in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0430] This application also provides a computer program product, including computer program instructions.

[0431] Optionally, the computer program product can be applied to the network device in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, they will not be described in detail here.

[0432] Optionally, the computer program product can be applied to the first node in the embodiments of this application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the first node in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0433] This application also provides a computer program.

[0434] Optionally, the computer program can be applied to the network device in the embodiments of this application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0435] Optionally, the computer program can be applied to the first node in the embodiments of this application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the first node in the various methods of the embodiments of this application. For the sake of brevity, it will not be described in detail here.

[0436] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0437] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0438] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0439] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0440] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0441] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0442] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless communication method, the method comprising: The network device sends first information, which is used to schedule the transmission of power supply signals and / or carrier signals; The power supply signal is used for radio frequency energy harvesting of the terminal device, and the carrier signal is used for backscatter communication of the terminal device.

2. The method according to claim 1, wherein, The first information includes the first scheduling information and / or the second scheduling information, wherein the first scheduling information is used to schedule the transmission of the power supply signal, and the second scheduling information is used to schedule the transmission of the carrier signal.

3. The method according to claim 2, wherein, The first scheduling information and / or the second scheduling information includes one or more of the following: Device information, wherein the device information is used to indicate one or more of the following: a first device and / or a second device, the terminal device, wherein the first device is used to transmit the power supply signal, and the second device is used to transmit the carrier signal: Time information, which is used to indicate the transmission time of the power supply signal and / or the carrier signal; First indication information, the first indication information is used to indicate enabling or de-enabling the transmission of the power signal and / or the carrier signal.

4. The method according to claim 3, wherein, The first scheduling information and / or the second scheduling information further include one or more of the following: The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal; The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal; Power information, the power indication information being used to indicate the transmission power of the power supply 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 may be the same information or different information.

6. The method according to claim 3, wherein, The information used to schedule the transmission of the power supply signal and / or carrier signal also includes predefined second information, which includes one or more of the following: The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal; The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal; Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

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

8. The method according to claim 7, wherein, The first PPDU carries the first information in one or more of the following fields: A preamble, wherein the preamble is located in the wideband portion of the first PPDU; The first field is located after the preamble and in the wideband portion of the first PPDU; The second field is located in the narrow band portion of the first PPDU.

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

10. The method according to claim 8 or 9, wherein, The first scheduling information and the second scheduling information are carried in fields of the same field type, or in fields of 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, wherein the first scheduling information and the second scheduling information are carried on the same first PPDU, or the first scheduling information and the second scheduling information are carried on different first PPDUs.

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

13. The method according to claim 11, wherein, 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.

14. The method according to any one of claims 8 to 13, wherein, If one or more fields carrying the first information are located in the broadband portion of the first PPDU, the first PPDU may or may not include a narrowband portion.

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

16. The method according to claim 15, wherein, The narrowband portion of the first PPDU is used for downlink transmission and / or to instruct the terminal device to send uplink transmission.

17. The method according to claim 16, wherein, The first information includes the second scheduling information.

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

19. The method according to claim 18, wherein, The information carried by the preamble of the first PPDU is different from the information carried by the preamble of the second PPDU.

20. A wireless communication method, the method comprising: The first node receives first information, which is used to schedule the transmission of power supply signals and / or carrier signals; The power supply signal is used for radio frequency energy harvesting of the terminal device, and the carrier signal is used for backscatter communication of the terminal device.

21. The method according to claim 20, wherein, The first node includes a first device and / or a second device, wherein the first device is used to transmit the power supply signal and the second device is used to transmit the carrier signal.

22. The method according to claim 20 or 21, wherein, The first information includes the first scheduling information and / or the second scheduling information, wherein the first scheduling information is used to schedule the transmission of the power supply signal, and the second scheduling information is used to schedule the transmission of the carrier signal.

23. The method according to claim 22, wherein, The first scheduling information and / or the second scheduling information includes one or more of the following: Device information, wherein the device information is used to indicate one or more of the following: a first device and / or a second device, the terminal device, wherein the first device is used to transmit the power supply signal, and the second device is used to transmit the carrier signal: Time information, which is used to indicate the transmission time of the power supply signal and / or the carrier signal; First indication information, the first indication information is used to indicate enabling or de-enabling the transmission of the power signal and / or the carrier signal.

24. The method according to claim 23, wherein, The first scheduling information and / or the second scheduling information further include one or more of the following: The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal; The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal; Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

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

26. The method according to claim 23, wherein, The information used to schedule the transmission of the power supply signal and / or carrier signal also includes predefined second information, which includes one or more of the following: The second indication information is used to indicate the frequency band and / or frequency point of the power supply signal and / or the carrier signal; The third indication information is used to indicate the waveform of the power supply signal and / or the carrier signal; Power information, the power indication information being used to indicate the transmission power of the power supply signal and / or the carrier signal.

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

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

29. The method according to claim 28, wherein, The first PPDU carries the first information in one or more of the following fields: A preamble, wherein the preamble is located in the wideband portion of the first PPDU; The first field is located after the preamble and in the wideband portion of the first PPDU; The second field is located in the narrow band portion of the first PPDU.

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

32. The method according to any one of claims 28 to 31, wherein, The first information includes first scheduling information and second scheduling information, wherein the first scheduling information and the second scheduling information are carried on the same first PPDU, or the first scheduling information and the second scheduling information are carried on different first PPDUs.

33. The method according to claim 32, wherein, The first scheduling information and the second scheduling information are carried in different first PPDUs. The information carried by the preamble of the first PPDU carrying the first scheduling information is different from the information carried by the preamble of the first PPDU carrying the second scheduling information.

34. The method according to claim 33, wherein, The first node is a first device, and the first node ignores the first PPDU that carries the second scheduling information.

35. The method according to claim 33, wherein, The first node is the second device, and the second node ignores the first PPDU that carries the first scheduling information.

36. The method according to claim 32, wherein, 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.

37. The method according to any one of claims 29 to 36, wherein, If one or more fields carrying the first information are located in the broadband portion of the first PPDU, the first PPDU may or may not include a narrowband portion.

38. The method according to any one of claims 29 to 36, wherein, Some or all of the one or more first PPDUs include a narrowband portion.

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

40. The method according to claim 39, wherein, The first information includes the second scheduling information.

41. A network device, comprising: The first communication unit is configured to send first information, which is used to schedule the transmission of power supply signals and / or carrier signals. The power supply signal is used for radio frequency energy harvesting of the terminal device, and the carrier signal is used for backscatter communication of the terminal device.

42. A first node, comprising: The second communication unit is configured to receive first information, which is used to schedule the transmission of power supply signals and / or carrier signals. The power supply signal is used for radio frequency energy harvesting of the terminal device, and the carrier signal is used for backscatter communication of the terminal device.

43. A communication device, comprising: A processor and a memory, a transceiver, the memory for storing a computer program, the processor for calling and running the computer program stored in the memory in conjunction with the transceiver to perform the method as described in any one of claims 1 to 19, or to perform the method as described in any one of claims 20 to 40.

44. A chip, comprising: A processor for retrieving and running a computer program from memory, causing a device having the chip mounted to perform the method as claimed in any one of claims 1 to 19, or the method as claimed in any one of claims 20 to 40.

45. A computer-readable storage medium for storing a computer program, the execution of which causes the computer to perform the method as claimed in any one of claims 1 to 19, or the method as claimed in any one of claims 20 to 40.

46. ​​A computer program product comprising computer program instructions, the execution of which causes a computer to perform the method as claimed in any one of claims 1 to 19, or to perform the method as claimed in any one of claims 20 to 40.

47. A computer program, the execution of which causes a computer to perform the method as claimed in any one of claims 1 to 19, or the method as claimed in any one of claims 20 to 40.

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