Wireless communication methods

Abstract

A wireless communication method and device, the method comprising a network device transmitting a first physical layer protocol data unit (PPDU), the first PPDU comprising a first preamble portion and an ambient power generation (AMP) portion, wherein the first PPDU is a PPDU transmitted to an AMP device.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of communications, specifically to methods and devices for wireless communications.

Background Art

[0002] In some scenarios, there can be various types of Physical Layer Protocol Data Units (PPDUs) used for different types of non-Access Point Station devices (non-AP STAs), such as non-High Throughput (non-HT) PPDUs, Wake Up Signal (WUS) PPDUs, etc.

[0003] Ambient power enabled IoT (Ambient IoT or AMP IoT, AMP) devices have the characteristics of low complexity, low power consumption, low cost, and maintenance-free, so large-scale introduction is being considered. How to design PPDUs for AMP devices is an urgent issue.

Summary of the Invention

Means for Solving the Problems

[0004] The present application provides a method and device for wireless communication that realizes PPDU design for AMP devices.

[0005] In a first aspect, a method for wireless communication is provided. The method for wireless communication includes a network device transmitting a first Physical Layer Protocol Data Unit (PPDU), where the first PPDU includes a first preamble part and an Ambient power enabled (AMP) part, and where the first PPDU is a PPDU transmitted to an AMP device.

[0006] A second embodiment provides a wireless communication method, the wireless communication method comprising an ambient power generation AMP device receiving a first physical layer protocol data unit PPDU, wherein the first PPDU includes a first preamble portion and the AMP portion.

[0007] In a third embodiment, a wireless communication method is provided, the wireless communication method comprising: a non-ambient power generation AMP device receiving a first physical layer protocol data unit PPDU, wherein the first PPDU includes a first preamble portion and an AMP portion; and determining, based on the first preamble portion and / or the AMP portion, that the first PPDU is a PPDU to be transmitted to the AMP device.

[0008] In the fourth aspect, a network device is provided, which is used to carry out the methods in the first aspect or each of its embodiments.

[0009] Specifically, the network device includes a functional module for performing the method in the first embodiment or each of its embodiments.

[0010] In the fifth aspect, an ambient power generation AMP device is provided, which is used to carry out the method in the second aspect or each embodiment thereof. Specifically, the AMP device includes a functional module for carrying out the method in the second aspect or each embodiment thereof.

[0011] In the sixth aspect, a non-ambient power generation AMP device is provided, which is used to carry out the method in the third aspect or each of its embodiments.

[0012] Specifically, the non-AMP device includes a functional module for performing the method in the third embodiment or each of its embodiments.

[0013] A seventh aspect provides a network device including a processor and memory. The memory is used to store computer programs, and the processor is used to call and execute the computer programs stored in the memory in order to perform the methods of the first aspect or each embodiment described above.

[0014] The eighth aspect provides an ambient power generation AMP device including a processor and memory. The memory is used to store computer programs, and the processor is used to call and execute the computer programs stored in the memory in order to perform the methods of the second aspect or each embodiment thereof.

[0015] The ninth aspect provides a non-ambient power generation AMP device including a processor and memory. The memory is used to store computer programs, and the processor is used to call and execute the computer programs stored in the memory in order to perform the methods of the third aspect or each embodiment thereof.

[0016] In the tenth aspect, a chip is provided which is used to implement any of the first to third aspects or each implementation thereof. Specifically, the chip includes a processor which is used to call and execute a computer program from memory to cause a device to which the device is attached to perform any of the first to third aspects or each implementation thereof.

[0017] In the eleventh embodiment, a computer-readable storage medium is provided, which is used to store a computer program, and the computer program causes the computer to execute any of the first to third embodiments or the methods in each of those implementations.

[0018] In the 12th aspect, a computer program product is provided, the computer program product includes computer program instructions, and the computer program instructions cause a computer to execute the method in any one of the above 1st to 3rd aspects or its respective implementation manners.

[0019] In the 13th aspect, a computer program is provided, and when the computer program is executed on a computer, it causes the computer to execute the method in any one of the above 1st to 3rd aspects or its respective implementation manners.

[0020] According to the above technical solution, a network device can transmit a first PPDU to an AMP device, where the first PPDU includes a first preamble part and an AMP part, thereby realizing the PPDU design for the AMP device.

Brief Description of the Drawings

[0021] / / There seems to be a repeated line break here in the original, but following the rules, it's kept as is. [Figure 1] It is a schematic diagram of a communication system architecture according to an embodiment of the present application. [Figure 2] It is a schematic diagram of a zero-power consumption communication system according to an example of the present application. [Figure 3] It is a schematic diagram of the principle of power harvesting according to an embodiment of the present application. [Figure 4] It is a schematic diagram of the principle of backscatter communication according to an embodiment of the present application. [Figure 5] It is a schematic circuit diagram of resistance load modulation according to an embodiment of the present application. [Figure 6] It is a schematic format diagram of a non-HT PPDU. [Figure 7] It is a schematic format diagram of a WUR PPDU. [Figure 8] It is a schematic diagram of a wireless communication method according to an embodiment of the present application. [Figure 9] ~ [Figure 14] It is a schematic format diagram of an AMP PPDU according to an embodiment of the present application. [Figure 15] It is a schematic block diagram of a network device according to an embodiment of the present application. [Figure 16] It is a schematic block diagram of an ambient power generation AMP device according to an embodiment of the present application. [Figure 17] It is a schematic block diagram of a non-ambient power generation AMP device according to an embodiment of the present application. [Figure 18] It is a schematic block diagram of a communication device according to an embodiment of the present application. [Figure 19] It is a schematic block diagram of a chip according to an embodiment of the present application. [Figure 20] It is a schematic block diagram of a communication system according to an embodiment of the present application.

Embodiments for Carrying out the Invention

[0022] Hereinafter, referring to the drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described. It is clear that the described embodiments are only some of the embodiments of the present application, not all of the embodiments. For the embodiments in the present application, all other embodiments obtained on the premise that those skilled in the art have not made creative efforts belong to the protection scope of the present application.

[0023] The technical solutions of the embodiments of this application include, for example, Global System of Mobile communication (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), Long Term Evolution (LTE) systems, Advanced Long Term Evolution (LTE-A) systems, New Radio (NR) systems, NR system evolution systems, LTE-based access to unlicensed spectrum (LTE-U) systems, NR-based access to unlicensed spectrum (NR-U) systems, Non-Terrestrial Networks (NTN) systems, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), and Wireless Fidelity (Wireless It can be applied to various communication systems, such as Fidelity (WiFi), 5th Generation (5G) communication systems, cellular Internet of Things systems, cellular passive Internet of Things systems, and other communication systems.

[0024] Typically, traditional communication systems support a limited number of connections, and these are relatively easy to implement. However, with the advancement of communication technology, mobile communication systems now support not only traditional communication but also, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, and vehicle-to-everything (V2X) communication. The embodiments of this application can also be applied to these communication systems.

[0025] As one option, the communication system in the embodiment of the present application is applicable to carrier aggregation (CA) scenarios, dual connectivity (DC) scenarios, and also to standalone (SA) network deployment scenarios.

[0026] As one option, the communication system in the embodiment of the present application is applicable to the unlicensed spectrum, where the unlicensed spectrum can be considered as a shared spectrum, or the communication system in the embodiment of the present application is also applicable to the licensed spectrum, where the licensed spectrum can be considered as a non-shared spectrum.

[0027] In the embodiments of this application, each embodiment will be described in accordance with the network device and terminal device, where the terminal device may also be called a user device (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile platform, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment.

[0028] In the embodiments of the present application, the network device may be a device for communicating with a mobile device, and the network device may be an access point (AP) in WLAN, a base transceiver station (BTS) in GSM® or CDMA, a base station (NodeB, NB) in WCDMA®, an evolutionary Node B (eNB or eNodeB) in LTE®, or a relay station or access point, or a network device (gNB) in an in-vehicle device, a wearable device and an NR network, or a network device in the cellular Internet of Things, or a network device in the cellular passive Internet of Things, or a network device in a future evolving PLMN network or an NTN network, etc.

[0029] In the embodiments of this application, the network device may have mobile characteristics; for example, the network device may be a mobile device, and this is merely an example and not an limitation. As an option, the network device may be a satellite or a balloon base station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, or a high elliptical orbit (HEO) satellite. As an option, the network device may be a base station installed on land, in a body of water, etc.

[0030] In the embodiments of the present invention, a network device can provide services to a cell, and a terminal device communicates with the network device using the transmission resources (e.g., frequency domain resources or spectrum resources) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station), and the cell may belong to a macro base station or to a base station corresponding to a small cell, where the small cell may include a metro cell, micro cell, pico cell, femto cell, etc., and these small cells are characterized by a small coverage range and low transmission power, making them suitable for providing high-speed data transmission services.

[0031] Terminal devices may be stations (ST) in a WLAN, cellular telephones, cordless telephones, Session Initiation Protocol (SIP) telephones, Wireless Local Loop (WLL) stations, Personal Digital Assistant (PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in next-generation communication systems (e.g., NR networks), or terminal devices in future evolving Public Land Mobile Network (PLMN) networks, terminal devices in the cellular Internet of Things, terminal devices in the cellular passive Internet of Things, and so on.

[0032] In embodiments of the present invention, the terminal device may be located on land (including indoors or outdoors, handheld, wearable or in-vehicle), on water (e.g., on a ship), or in the air (e.g., on an airplane, balloon, or satellite).

[0033] In the embodiments of this application, the terminal device may be a mobile phone, a tablet, a computer with wireless transmission and reception capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical care, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home.

[0034] In the embodiments of this application, the terminal device may be a wearable device, and this is merely an example and not an limitation. Wearable devices, also called wearable smart devices, are a general term for wearable devices such as glasses, gloves, watches, clothing, and shoes, which are developed by applying wearable technology to intelligently design everyday clothing. Wearable devices are portable devices that are worn directly on the body or incorporated into the user's clothing or accessories. Wearable devices are not merely hardware devices, but also achieve powerful functionality through software support, data interaction, and cloud interaction. Wearable smart devices in a broad sense include devices that are fully functional, large in size, and capable of performing all or part of their functions without relying on a smartphone (e.g., smartwatches and smart glasses), and devices that focus on specific application functions and require use in conjunction with other devices (e.g., smartphones) (e.g., various smart bands and smart jewelry that perform vital sign monitoring).

[0035] As an example, Figure 1 shows a communication system 100 applied to an embodiment of the present application. The communication system 100 may include a network device 110, which may be a device that communicates with terminal devices 120 (also called a communication terminal or terminal). The network device 110 can provide communication coverage to a specific geographic area and can communicate with terminal devices located within that coverage area.

[0036] Figure 1 illustrates one network device and two terminal devices. As an option, the communication system 100 may include multiple network devices, and each network device may include an additional number of terminal devices within its coverage area. The embodiments of this application are not limited to these.

[0037] As an option, the communication system 100 may further include other network entities such as a network controller or a mobility management entity, and the embodiments of the present application are not limited thereto.

[0038] It should be understood that devices having communication functions in the network / system of the embodiments of the present application can be called communication devices. Taking the communication system 100 shown in Figure 1 as an example, the communication device may include a network device 110 and a terminal device 120 having communication functions, and the network device 110 and the terminal device 120 may be the specific devices described above, and a detailed explanation is omitted here. The communication device may further include other devices in the communication system 100, such as other network entities such as a network controller or a mobility management entity, and the embodiments of the present application are not limited thereto.

[0039] It should be understood that the terms “system” and “network” as used herein are often interchangeable. The terms “and / or” as used herein are used to describe the relationship between related objects and indicate that three relationships may exist. For example, “A and / or B” can represent three cases: A existing alone, A and B existing together, or B existing alone. The symbol “ / ” as used herein usually indicates that the preceding and following related objects have an “or” relationship.

[0040] It should be understood that the “instruction” referred to in the embodiments of this application may be direct instruction, indirect instruction, or an indication of a related relationship. For example, A instructing B can mean that A directly instructs B, for example, that B can be obtained by A. It can also mean that A indirectly instructs B, for example, that A instructs C, that B can be obtained by C, and that there is a related relationship between A and B.

[0041] In the description of the embodiments of this application, the term "correspondence" may mean that there is a direct or indirect corresponding relationship between the two, or that there is a related relationship between the two, or that there is a relationship such as "to instruct" and "to be instructed," or "to arrange" and "to be arranged."

[0042] In embodiments of the present application, “predefined” can be achieved by pre-storing a device (including, for example, terminal devices and network devices) a corresponding code, table, or other method that can be used to instruct it on the relevant information, and the present application is not limited to any specific implementation. For example, “predefined” may mean defined in a protocol.

[0043] In the embodiments of this application, the term "protocol" may refer to a standard protocol in the field of communications, and may include, but is not limited to, the LTE protocol, the NR protocol, and related protocols applicable to future communications systems.

[0044] To facilitate understanding of the technical proposal of the embodiment of this application, related technologies will be explained.

[0045] 1. Zero-power communication

[0046] Key technologies for zero-power communications include power harvesting, backscatter communications, and low-power technologies.

[0047] As shown in Figure 2, a typical zero-power communication system (e.g., an RFID system) includes a network device (e.g., an RFID system reader / writer) and a zero-power device (e.g., an electronic tag). The network device is used to transmit radio energy supply signals and downlink communication signals to the zero-power device and to receive backscatter signals from the zero-power device. A basic zero-power device includes a power harvesting module, a backscatter communication module, and a low-power calculation module. The zero-power device may further include a memory or sensor used to store some basic information (e.g., item labels) or sensing data such as ambient temperature and humidity.

[0048] For example, a power harvesting module can collect energy carried by radio waves in space (Figure 2 shows radio waves emitted by a network device), and is used to drive a low-power calculation module of a zero-power device and realize backscatter communication. After obtaining energy, the zero-power device can receive control commands from the network device and transmit data to the network device using the backscatter method based on the control commands. The transmitted data may be data stored by the zero-power device itself (for example, identity markers or pre-written information such as the product's manufacturing date, brand, and manufacturer). By incorporating various types of sensors, the zero-power device can report data collected by each type of sensor based on the zero-power mechanism.

[0049] The following describes important technologies in zero-power communication.

[0050] 1. Radio frequency power harvesting (RF power harvesting)

[0051] As shown in Figure 3, the radio frequency power harvesting module achieves energy extraction from electromagnetic waves in space based on the principle of electromagnetic induction, and further obtains the energy necessary to drive the operation of zero-power devices, for example, low-power modulation / demodulation modules, sensors, and memory readouts. Therefore, it does not require a conventional battery in zero-power devices.

[0052] 2. Backscattering

[0053] As shown in Figure 4, a zero-power device receives a carrier wave signal transmitted from a network device, modulates the carrier wave signal, loads the information that needs to be transmitted, and radiates the modulated signal from an antenna. This information transmission process is called backscatter communication. Backscatter and load modulation functions are inseparable. Load modulation completes the modulation process by adjusting and controlling the circuit parameters of the oscillation circuit of the zero-power device according to the beat of the data stream, thereby changing parameters such as the magnitude of the impedance of the zero-power device. Load modulation techniques mainly include two methods: resistive load modulation and capacitive load modulation. In resistive load modulation, as shown in Figure 5, one resistor is connected in parallel as a load, and this resistor is controlled to be on or off based on the control of the binary data stream. The on / off switching of the resistor causes a change in voltage in the circuit, thus achieving amplitude shift modulation (ASK), that is, signal modulation and transmission are achieved by adjusting the magnitude of the amplitude of the backscatter signal of the zero-power device. Similarly, in capacitive load modulation, the on / off switching of a capacitor can change the circuit resonant frequency, enabling frequency shift modulation (FSK). In other words, signal modulation and transmission can be achieved by adjusting the operating frequency of the backscatter signal of a zero-power device.

[0054] Thus, zero-power devices achieve backscatter communication processes by performing information modulation on the incoming wave signal using a load modulation method. Therefore, zero-power devices (1) Because it does not actively emit signals, complex radio frequency links such as PAs and radio frequency filters are unnecessary. (2) Since there is no need to actively generate high-frequency signals, a high-frequency crystal oscillator is not required. (3) With backscatter communication, terminal signal transmission does not require the terminal itself to consume energy. This has a significant advantage.

[0055] 3. Encoding technology

[0056] Data transmitted by zero-power devices can represent binary "1s" and "0s" using different coding formats. Radio frequency identification systems typically use one of the following coding schemes: non-zero-return inverted (NRZ) coding, Manchester coding, unipolar zero-return coding, differential two-phase (DBP) coding, differential coding, pulse-interval coding (PIE), biphase coding (FM0), Miller coding, and differential coding. Generally, different coding techniques employ different pulse signals to represent 0s and 1s.

[0057] In some scenarios, zero-power devices can be classified into the following types based on their energy source and usage:

[0058] 1. Passive zero-power consumption devices

[0059] Zero-power devices (e.g., electronic tags in RFID systems) do not require a built-in battery. When a zero-power device approaches a network device (e.g., a reader / writer in an RFID system), the zero-power device is within the near-field range formed by the network device's antenna radiation. Therefore, the antenna of the zero-power device generates an induced current through electromagnetic induction, which drives the low-power chip circuit of the zero-power device. This enables operations such as demodulation of the forward link signal and modulation of the reverse link (also called the reflected link) signal. For backscatter links, the zero-power device transmits signals using a backscatter realization method.

[0060] As can be seen from the above, passive zero-power devices do not require a built-in battery for driving either the forward link or the reverse link, and are truly zero-power devices.

[0061] Passive zero-power devices do not require batteries, and both their radio frequency and baseband circuits are very simple. They do not require equipment such as low-noise amplifiers (LNAs), power amplifiers (PAs), crystal oscillators, or analog-to-digital converters (ADCs), resulting in many advantages such as being small, lightweight, very inexpensive, and having a long lifespan.

[0062] Passive zero-power terminals can also support other power harvesting methods, obtaining energy for the drive circuit by harvesting energy from the environment (e.g., light energy, thermal energy, kinetic energy, mechanical energy, etc.) to support communication for the terminal device.

[0063] 2. Semi-passive zero-power consumption devices

[0064] Although a semi-passive zero-power device itself cannot be fitted with a conventional battery, it can collect radio wave energy using an RF power harvesting module, or collect energy from the environment (e.g., solar energy, thermal energy, mechanical vibration energy, etc.) using a power harvesting module, and simultaneously store the collected energy in an energy storage unit (e.g., a capacitor). After the energy storage unit has obtained energy, it can drive the low-power chip circuit of the zero-power device. This enables operations such as demodulation of forward-link signals and modulation of reverse-link signals. For backscatter links, the zero-power device transmits signals using a backscatter realization method. Alternatively, the zero-power device can communicate by active transmission using a low-power transmitter based on the collected energy.

[0065] As can be seen from the above, the semi-passive zero-power consumption device does not require a built-in battery for driving either the forward link or the reverse link. During operation, it uses energy stored in a capacitor, but since this energy originates from radio wave energy collected by the power harvesting module, it becomes a truly zero-power consumption terminal.

[0066] Semi-passive zero-power devices inherit many of the advantages of passive zero-power devices, resulting in numerous benefits such as small size, light weight, very low cost, and long lifespan.

[0067] 3. Active-zero power consumption devices

[0068] Zero-power devices used in some scenarios may be active zero-power devices, and this type of device can incorporate a battery. The battery is used to power the low-power chip circuitry of the zero-power device, enabling operations such as demodulation of forward-link signals and modulation of reverse-link signals. However, for backscatter links, zero-power devices transmit signals using a backscatter implementation method. Therefore, the zero power consumption of this type of device is mainly embodied in the fact that reverse-link signal transmission does not require power from the terminal itself and uses a backscatter method.

[0069] Active-zero power consumption terminals incorporate a battery to power the RFID chip, increasing the read / write distance and improving communication reliability. Therefore, they are suitable for several scenarios where there are relatively high demands regarding communication distance and read latency.

[0070] In some scenarios, zero-power devices can be classified into the following types based on the type of transmitter:

[0071] 1) Zero-power devices based on backscattering

[0072] This type of zero-power device transmits uplink data using the backscattering method described above. This type of zero-power device does not have an active transmitter that transmits data actively, but only a backscattering transmitter. Therefore, when this type of zero-power device transmits data, it is necessary for a carrier wave to be supplied by a network device, and this type of zero-power device achieves data transmission by performing backscattering based on the carrier wave.

[0073] 2) Zero-power devices based on active transmitters

[0074] This type of zero-power device transmits uplink data using an active transmitter that has the capability to transmit actively. Therefore, when transmitting data, this type of zero-power device can transmit data using its own active transmitter, eliminating the need for carrier wave supply from network devices. The active transmitter applied to the zero-power device may be, for example, an ultra-low power ASK or ultra-low power FSK transmitter, and when transmitting a 100uW signal, the total power consumption can be reduced to 400-600uW.

[0075] 3) Zero-power device equipped with both a backscatter transmitter and an active transmitter.

[0076] This type of zero-power device can support both backscatter transmitters and active transmitters. This type of zero-power device can determine which signal transmission method to use depending on different circumstances (e.g., power consumption, available environmental energy) or based on scheduling by the network device; that is, it can choose to transmit signals using either an active transmitter or a backscatter transmitter.

[0077] With the rapid development of the Internet of Things, existing Internet of Things communication technologies are no longer able to meet the Internet of Things communication needs in many scenarios, for example,

[0078] 1. A challenging communication environment.

[0079] Some Internet of Things (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, track monitoring of high-speed trains, high-temperature environment monitoring, and industrial production lines. In these scenarios, existing IoT devices may not function due to the limitations of normal power supply operating environments. Furthermore, extreme operating environments are disadvantageous for IoT maintenance (e.g., battery replacement).

[0080] 2. Requirements for the form of extremely small terminals

[0081] For example, in several Internet of Things (IoT) communication scenarios such as food traceability, product distribution, and smart wearables, extremely small dimensions are required for terminals to facilitate use in these scenarios. For instance, IoT terminals used for product management in distribution channels typically use the form of electronic tags and are embedded in product packaging in a very compact form. Also, lightweight wearable devices, for example, can meet user needs and improve the user experience.

[0082] 3. Demand for extremely low-cost Internet of Things communication.

[0083] In many Internet of Things (IoT) communication scenarios, a sufficiently low cost for IoT devices is required to enhance their competitiveness against other alternative technologies. For example, in logistics and warehousing, attaching IoT devices to each item facilitates the management of large volumes of goods. Communication between these devices and the logistics network allows for precise management of the entire logistics process and its entire lifecycle. In these scenarios, the price of IoT devices must be sufficiently competitive.

[0084] Therefore, to address these unmet demands for Internet of Things (IoT) communication, it is necessary to develop an ultra-low-cost, extremely compact, battery-free / maintenance-free IoT for cellular networks as well, and a zero-power IoT can precisely meet this requirement.

[0085] The Internet of Things (IoT), which uses zero power consumption, can also be called the Ambient Power Enabled IoT (Ambient IoT or AMP IoT). Zero power consumption devices can also be called Ambient IoT devices or AMP IoT devices. Ambient IoT devices can refer to various ambient power IoT devices that use various environmental energy sources (e.g., radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, etc.). Such devices may not have energy storage capabilities, or they may have very limited energy storage capabilities (e.g., capacitors using tens of uF capacitance).

[0086] Ambient IoT can be used in at least the following four types of scenarios: 1. Object identification (e.g., logistics, product management on production lines, supply chain management). 2. Environmental monitoring (e.g., monitoring of operating environment, natural environment temperature, humidity, and hazardous gases). 3. Positioning (e.g., indoor positioning, smart item retrieval, item location management on production lines, etc.). 4. Smart control (for example, smart control of various electrical appliances in a smart home (turning air conditioners on / off, adjusting the temperature), smart control of various facilities in an agricultural greenhouse (automatic irrigation, fertilization)).

[0087] 2. Cellular Passive Internet of Things

[0088] With the increasing industry applications of 5G, the types of connected devices and application scenarios are also expanding, and the demands on the cost and power consumption of communication terminals are becoming even higher. Therefore, the application of battery-free, low-cost passive Internet of Things (IoT) devices will become a key technology for cellular IoT, enriching the types and number of 5G network-linked terminals and realizing a true Internet of Things. Here, passive IoT devices are based on zero-power communication technology (e.g., RFID technology) and may be extended based on zero-power communication technology for application to cellular IoT.

[0089] Figure 6 is a schematic diagram of the structure of an 802.11a non-high-throughput (non-HT) Physical Layer Protocol Data Unit (PPDU). To distinguish between a Wake Up Signal (WUS) PPDU and a non-HT PPDU, Binary Phase Shift Keying (BPSK) Mark 1 (BPSK-Mark1) field and a BPSK-Mark 2 field were inserted after the signal (SIG) field, as shown in Figure 7.

[0090] Ambient power-enabled Internet of Things (AMP IoT, AMP) devices are being considered for large-scale deployment due to their low complexity, low power consumption, low cost, and maintenance-free nature. Designing PPDUs specifically for AMP devices to distinguish them from other PPDUs is a pressing issue.

[0091] To facilitate understanding of the technical proposal of the embodiments of this application, the technical proposal of this application will be described in detail below using specific embodiments. The above related technologies can be arbitrarily combined with the technical proposal of the embodiments of this application as selectable technical proposals, and all of them fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least some of the following.

[0092] Figure 8 is a schematic diagram of a wireless communication method 200 according to an embodiment of the present application, and as shown in Figure 8, the method 200 includes at least part of the following:

[0093] In S210, the network device transmits a first physical layer protocol data unit (PPDU), which includes a first preamble portion and an ambient power generation (AMP) portion, where the first PPDU is the PPDU transmitted to the AMP device.

[0094] In the embodiments of this application, the AMP device is referred to as an ambient power generation Internet of Things device (AMP IoT device or Ambient IoT device), a zero power consumption device, or a zero power consumption terminal.

[0095] In some embodiments, an AMP device may be a type of device defined based on characteristics such as device complexity, power consumption, energy source, communication method, and waveform used.

[0096] For example, an AMP device may be a device that communicates based on ambient power generation, and for instance, an AMP device may use ambient power generation such as radio frequency energy, light energy, solar energy, thermal energy, or mechanical energy to obtain energy for communication.

[0097] Furthermore, an AMP device may be a type of device that is low in complexity or employs a new waveform, for example, using a low-level modulation scheme, a simple waveform, or a narrow-bandwidth signal for communication.

[0098] Furthermore, for example, an AMP device may be a type of device that employs a backscatter communication method.

[0099] In some embodiments, the AMP device can also support an active transmission communication scheme.

[0100] In some embodiments, the non-AMP device may be an existing terminal in the communication system, for example, an existing terminal in a WIFI system, specifically an STA.

[0101] It should be understood that the embodiments of this application are applicable to WIFI systems (in other words, systems that support the 802.11 protocol), and the 802.11 protocol may include existing 802.11 protocols or new protocols that may be added in future 802.11 families.

[0102] In some embodiments, the network device may refer to an access point (AP) in a Wi-Fi system, and this application is not limited to this.

[0103] This application is not limited to the transmitting device of the first PPDU. For example, the first PPDU may be transmitted from a network device to an AMP device, or from a terminal device to an AMP device. For example, an STA can transmit the first PPDU to an AMP device.

[0104] In the embodiments of the present application, if the PPDU is a PPDU transmitted to an AMP device, the PPDU is also called an AMP PPDU.

[0105] In some embodiments, the first preamble portion can be received by a non-AMP device, and the AMP portion can be received by an AMP device.

[0106] In some embodiments, the AMP portion can also be received by a non-AMP device.

[0107] In some embodiments, the AMP device can receive a first PPDU, for example, by receiving the AMP portion of the first PPDU.

[0108] In some embodiments, the non-AMP device may also receive the first PPDU, for example, the first preamble portion of the first PPDU, or the first preamble portion and the AMP portion.

[0109] In some embodiments, the first preamble portion is also called the legacy preamble portion.

[0110] In some embodiments, the first preamble portion and / or AMP portion is used to indicate that the first PPDU is an AMP PPDU, in other words, that the first PPDU is a PPDU to be sent to an AMP device. For example, fields may be added to the first preamble portion or AMP portion, or existing fields in the first preamble portion may be used to indicate the first PPDU.

[0111] Therefore, a non-AMP device can determine, based on the first preamble portion and / or the AMP portion, that the first PPDU is an AMP PPDU, or in other words, that the first PPDU is a PPDU to be sent to an AMP device.

[0112] In some embodiments, the first preamble portion may include a legacy short training field (L-STF), a legacy long training field (L-LTF), and a legacy signal field (L-SIG).

[0113] In some embodiments, the Modulation and Coding Scheme (MCS) field of the L-SIG field in the first preamble portion is used to indicate that the first PPDU is an AMP PPDU, in other words, that the first PPDU is a PPDU to be transmitted to an AMP device. For example, if the MCS field is set to MCS0, it indicates that the first PPDU is an AMP PPDU.

[0114] Example 1: The AMP PPDU is indicated using the labeling field in the legacy preamble portion.

[0115] In some embodiments, the first preamble portion includes a target indicator field, and the modulation scheme of the target indicator field is used to indicate that the first PPDU is an AMP PPDU, in other words, that the first PPDU is a PPDU to be sent to an AMP device.

[0116] In some embodiments, the modulation scheme of the target indicator field differs from the modulation scheme of the indicator fields in the WUR PPDU (i.e., BPSK-Mark1 and BPSK-Mark2), thereby allowing the AMP PPDU and WUR PPDU to be distinguished by the modulation scheme of the target indicator field.

[0117] In some embodiments, the target indicator field includes a first indicator field and a second indicator field, and the modulation scheme of the first and / or second indicator fields is used to indicate that the first PPDU is an AMP PPDU, in other words, that the first PPDU is a PPDU to be transmitted to an AMP device.

[0118] In some embodiments, the modulation scheme of the first indicator field is not BPSK, and / or the modulation scheme of the second indicator field is not BPSK.

[0119] As a specific example, the modulation scheme of the first indicator field is quadrature binary phase shift keying (Q-BPSK), and / or the modulation scheme of the first indicator field is Q-BPSK.

[0120] Example 1-1: The modulation scheme for the first marked field is Q-BPSK (denoted as Q-BPSK-Mark1 field), and the modulation scheme for the second marked field is Q-BPSK (denoted as Q-BPSK-Mark2 field).

[0121] Therefore, AMP PPDU and WUR PPDU can be distinguished by the modulation scheme of the first and second marker fields.

[0122] In some embodiments, as shown in Figure 9, the first marker field is located after the L-SIG field, and the second marker field is located after the first marker field.

[0123] In the embodiment 1-1, in order to further distinguish between AMP PPDU and HT PPDU, the values ​​of the first indicator field and the second indicator field, and the value of the L-SIG field can be set to satisfy a predetermined relationship.

[0124] In one embodiment, the values ​​of the first and second indicator fields are the logical complement of the value of the L-SIG field.

[0125] For example, if the value of the L-SIG field is 0, the values ​​of both the first and second indicator fields may be 1.

[0126] In another embodiment, the exclusive OR of the first indicator field and the second indicator field is equal to the value of the L-SIG field.

[0127] For example, if the value of the L-SIG field is 0, then the values ​​of the first indicator field and the second indicator field are the same, for example, both are 0 or both are 1.

[0128] Example 1-2: The modulation scheme for the first marked field is BPSK (denoted as BPSK-Mark1 field), and the modulation scheme for the second marked field is Q-BPSK (denoted as Q-BPSK-Mark2 field).

[0129] Therefore, AMP PPDU and WUR PPDU can be distinguished by the modulation scheme of the first and second marker fields.

[0130] In some embodiments, as shown in Figure 10, the first marker field is located after the L-SIG field, and the second marker field is located after the first marker field.

[0131] In the embodiment 1-1, in order to further distinguish between AMP PPDU and VHT PPDU, the values ​​of the first and second indicator fields and the value of the L-SIG field can be set to satisfy a predetermined relationship.

[0132] In one embodiment, the values ​​of the first and second indicator fields are the logical complement of the value of the L-SIG field.

[0133] For example, if the value of the L-SIG field is 0, the values ​​of both the first and second indicator fields may be 1.

[0134] In another embodiment, the exclusive OR of the first indicator field and the second indicator field is equal to the value of the L-SIG field.

[0135] For example, if the value of the L-SIG field is 0, then the values ​​of the first indicator field and the second indicator field are the same, for example, both are 0 or both are 1.

[0136] Example 1-3: The modulation scheme for the first marked field is Q-BPSK (denoted as Q-BPSK-Mark1 field), and the modulation scheme for the second marked field is BPSK (denoted as BPSK-Mark2 field).

[0137] Therefore, AMP PPDU and WUR PPDU can be distinguished by the modulation scheme of the first and second marker fields.

[0138] In some embodiments, as shown in Figure 11, the first marker field is located after the L-SIG field, and the second marker field is located after the first marker field.

[0139] Example 2: Directing the AMP PPDU using a non-legacy synchronous sequence.

[0140] In some embodiments, the AMP portion may include a first synchronization sequence, which is a synchronization sequence corresponding to an AMP device (also known as AMP-sync), and which is used to indicate that the first PPDU is an AMP PPDU, or in other words, that the first PPDU is a PPDU to be sent to an AMP device.

[0141] In some embodiments, the first synchronization sequence differs from the second synchronization sequence, where the second synchronization sequence is a legacy sync sequence.

[0142] For example, in a high data rate scene, the first synchronization sequence is:

number

number

[0143] In some embodiments, the AMP portion includes a second preamble portion (also called the AMP preamble portion), and the first synchronization sequence is included in the second preamble portion.

[0144] In some embodiments, as shown in Figure 12, the first preamble portion includes a first BPSK-marked field (denoted as BPSK-Mark1) and a second BPSK-marked field (denoted as BPSK-Mark2), and the first synchronization sequence follows the first BPSK-marked field and the second BPSK-marked field.

[0145] Examples 1 and 2 can be implemented individually or in combination; that is, the network device can indicate the AMP PPDU by the first synchronization sequence alone, or by the target indicator field alone, or by both the target indicator field and the first synchronization sequence. For example, the first preamble portion before the first synchronization sequence in Figure 12 adopts the format design shown in Figures 9 to 11.

[0146] Example 3: A new labeling field is added to the legacy preamble to indicate AMP PPDU.

[0147] In some embodiments, the first preamble portion includes a third indicator field, which is used to indicate that the first PPDU is an AMP PPDU, or in other words, that the first PPDU is a PPDU to be sent to an AMP device.

[0148] In some embodiments, as shown in Figure 13, the first preamble portion includes a first BPSK labeling field, a second BPSK labeling field, and a third labeling field, the third labeling field being after the first and second BPSK labeling fields. That is, additional labeling fields can be added after the legacy BPSK labeling field to indicate the AMP PPDU.

[0149] In some embodiments, the number of symbols in the third indicator field belongs to {1, 2, 3, 4}.

[0150] In other words, the third marker field can occupy one OFDM symbol, two OFDM symbols, three OFDM symbols, or four OFDM symbols.

[0151] In some embodiments, the modulation scheme of the third indicator field may be BPSK or Q-BPSK.

[0152] Examples 1 and 3 can be implemented individually or in combination; that is, the network device can indicate the AMP PPDU by the target indicator field alone, or by the target indicator field alone, or by the target indicator field and the third indicator field. For example, the first BPSK indicator field and the second BPSK indicator field in Figure 13 can be replaced with the target indicator field in the example shown in Figures 9 to 11.

[0153] Example 4: A new labeling field is added to the AMP preamble to indicate AMP PPDU.

[0154] In some embodiments, the AMP portion includes a second preamble portion (also called the AMP preamble portion), the second preamble portion includes a fourth indicator field, the fourth indicator field is used to indicate that the first PPDU is an AMP PPDU, in other words, that the first PPDU is a PPDU to be sent to the AMP device.

[0155] In other words, to indicate that the PPDU is an AMP PPDU, a labeling field is added to the AMP preamble portion.

[0156] In some embodiments, as shown in Figure 14, the second preamble portion includes a second sync sequence and a fourth indicator field, the fourth indicator field being after the second sync sequence. Here, the second sync sequence may be a legacy sync sequence W.

[0157] In some embodiments, the fourth labeling field can be generated based on a legacy synchronization sequence W.

[0158] For example, in a high data rate scene, the fourth marker field is,

number

number

[0159] In some embodiments, the number of symbols in the fourth indicator field belongs to {1, 2, 3, 4}.

[0160] In other words, the fourth marker field can occupy one OFDM symbol, two OFDM symbols, three OFDM symbols, or four OFDM symbols.

[0161] In some embodiments, the modulation scheme of the fourth indicator field may be BPSK or Q-BPSK.

[0162] It should be understood that Examples 1 to 4 can be implemented individually or in combination.

[0163] For example, the target indicator field and the first synchronization sequence indicate AMP PPDU. In this case, the first preamble portion preceding the first synchronization sequence in Figure 12 adopts the format design of the example shown in Figures 9 to 11.

[0164] Furthermore, for example, a network device can indicate the AMP PPDU by a target indicator field and a third indicator field. In this case, the first BPSK indicator field and the second BPSK indicator field in Figure 13 are replaced by the target indicator field in the example shown in Figures 9 to 11.

[0165] Furthermore, for example, a network device can indicate the AMP PPDU by a target indicator field, a first synchronization sequence, and a third indicator field. In this case, the AMP portion in Figure 13 can adopt the format of the AMP portion in Figure 12, and the first BPSK indicator field and the second BPSK indicator field in the first preamble portion of Figure 13 are replaced with the target indicator field in the example shown in Figures 9 to 11.

[0166] Furthermore, for example, a network device can indicate the AMP PPDU by the target indicator field and the fourth indicator field, in which case the first preamble portion in Figure 14 can adopt the format design of the first preamble portion in the examples shown in Figures 9 to 11.

[0167] Example 5: Use existing fields in the legacy preamble portion to specify the AMP PPDU.

[0168] In some embodiments, the length field in the L-SIG field of the first preamble portion indicates that the first PPDU is an AMP PPDU, or in other words, that the first PPDU is a PPDU to be sent to an AMP device.

[0169] For example, set the value of the length field such that the remainder when divided by 3 is not equal to 0. For example, set the value of the length field to 3k+1 or 3k+2, where k is an integer.

[0170] Example 6:

[0171] In some embodiments, the AMP portion includes a MAC portion, and the MAC (header) of the MAC portion can be used to indicate that the first PPDU is an AMP PPDU, or in other words, that the first PPDU is a PPDU to be sent to an AMP device.

[0172] For example, the Type (Tpye) field in the MAC header is used to indicate that the first PPDU is an AMP PPDU, in other words, that the first PPDU is a PPDU sent to an AMP device. For example, if the value of the Tpye field is a reserved value (e.g., 5, 6, or 7), it is used to indicate that the first PPDU is an AMP PPDU, in other words, that the first PPDU is a PPDU sent to an AMP device.

[0173] In summary, in the embodiment of the present application, a network device can transmit a first PPDU, which includes a legacy preamble portion and an AMP portion, and accordingly, a non-AMP device can determine from the legacy preamble portion and / or AMP portion that the first PPDU is a PPDU to be transmitted to an AMP device, and the AMP device can receive the AMP portion of the first PPDU and obtain data information or control information to be transmitted from the network device to the AMP device.

[0174] For example, a network device can indicate that the first PPDU is a PPDU to be sent to an AMP device by the modulation scheme of the target indicator field in the legacy preamble portion.

[0175] Furthermore, for example, a network device can indicate that the first PPDU is a PPDU to be sent to an AMP device by adding a new indicator field to the legacy preamble portion.

[0176] Furthermore, for example, a network device can use a different synchronization sequence than the legacy synchronization sequence to indicate that the first PPDU is the PPDU to be sent to the AMP device.

[0177] Furthermore, for example, a network device can indicate that the first PPDU is a PPDU to be sent to the AMP device by adding a new indicator field to the AMP preamble portion.

[0178] Furthermore, for example, a network device can indicate that the first PPDU is a PPDU to be sent to an AMP device by the length field in the L-SIG field in the legacy preamble portion.

[0179] Furthermore, for example, a network device can indicate that the first PPDU is a PPDU to be sent to the AMP device by the type field in the MAC header of the MAC portion of the AMP portion.

[0180] Therefore, based on the above design, non-AMP devices and AMP devices can distinguish between AMP PPDUs and non-AMP PPDUs (e.g., WUR PPDUs).

[0181] The method embodiments of the present application will be described in detail above with reference to Figures 8 to 14, and the apparatus embodiments of the present application will be described in detail below with reference to Figures 15 to 20. It should be understood that the apparatus embodiments and the method embodiments correspond to each other, and that similar explanations can be found by referring to the method embodiments.

[0182] Figure 15 shows a schematic block diagram of a network device 400 according to an embodiment of the present application. As shown in Figure 15, the network device 400 includes a communication unit 410.

[0183] The communication unit 410 is used to transmit a first physical layer protocol data unit (PPDU), the first PPDU comprising a first preamble portion and an ambient power generation (AMP) portion, where the first PPDU is the PPDU to be transmitted to the AMP device.

[0184] In some embodiments, the first preamble portion includes a target indicator field, and the modulation scheme of the target indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

[0185] In some embodiments, the target indicator field includes a first indicator field and a second indicator field, and the modulation scheme of the first indicator field and / or the second indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

[0186] In some embodiments, the modulation schemes for the first and second indicator fields are both quadrature two-phase shift modulation (Q-BPSK), or,

[0187] The modulation scheme of the first indicator field is Q-BPSK, and the modulation scheme of the second indicator field is two-phase shift modulation BPSK, or

[0188] The modulation scheme for the second indicator field is Q-BPSK, and the modulation scheme for the first indicator field is BPSK.

[0189] In some embodiments, the first preamble portion includes a legacy signal L-SIG field, and the modulation schemes of both the first and second indicator fields are Q-BPSK, or the modulation scheme of the first indicator field is BPSK and the modulation scheme of the second indicator field is Q-BPSK, in which case the values ​​of the first and second indicator fields and the value of the L-SIG field satisfy a predetermined relationship.

[0190] In some embodiments, the AMP portion includes a second preamble portion, the second preamble portion includes a first synchronization sequence, the first synchronization sequence is a synchronization sequence corresponding to an AMP device, and the first synchronization sequence is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0191] In some embodiments, the first preamble portion includes a first BPSK-labeled field and a second BPSK-labeled field, and the first synchronization sequence follows the first BPSK-labeled field and the second BPSK-labeled field.

[0192] In some embodiments, the first preamble portion includes a third indicator field, which is used to indicate that the first PPDU is a PPDU to be sent to an AMP device.

[0193] In some embodiments, the first preamble portion includes a first BPSK labeled field, a second BPSK labeled field, and the third labeled field, wherein the third labeled field is located after the first BPSK labeled field and the second BPSK labeled field.

[0194] In some embodiments, the modulation scheme of the third indicator field is BPSK or Q-BPSK.

[0195] In some embodiments, the number of symbols in the third indicator field belongs to set {1, 2, 3, 4}.

[0196] In some embodiments, the AMP portion includes a second preamble portion, the second preamble portion includes a fourth indicator field, the fourth indicator field is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0197] In some embodiments, the second preamble portion includes a second synchronization sequence and the fourth indicator field, the fourth indicator field being located after the second synchronization sequence.

[0198] In some embodiments, the modulation scheme of the fourth indicator field is BPSK or Q-BPSK.

[0199] In some embodiments, the number of symbols in the fourth indicator field belongs to set {1, 2, 3, 4}.

[0200] In some embodiments, the length field in the L-SIG field of the first preamble portion is used to indicate that the first PPDU is a PPDU to be sent to an AMP device.

[0201] In some embodiments, the remainder when the value of the length field is divided by 3 is not equal to 0.

[0202] In some embodiments, the AMP portion includes a media access control MAC portion, and the type field in the MAC header of the MAC portion is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0203] In some embodiments, the value of the type field being a reserved value is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0204] As one option, in some embodiments, the communication unit may be a communication interface or transceiver, or it may be a communication chip or a system-on-a-chip input / output interface. The processing unit may be one or more processors.

[0205] The network device 400 according to the embodiment of the present application can correspond to the network device in the method embodiment of the present application, and it should be understood that the above and other operations and / or functions of each unit in the network device 400 are for realizing the corresponding flow of the network device in the method shown in Figures 8 to 15, respectively. For the sake of brevity, a detailed explanation is omitted here.

[0206] Figure 16 shows a schematic block diagram of an ambient power generation AMP device 500 according to an embodiment of the present invention. As shown in Figure 16, the AMP device 500 includes a communication unit 510.

[0207] The communication unit 510 is used to receive a first physical layer protocol data unit (PPDU), the first PPDU comprising a first preamble portion and the AMP portion.

[0208] In some embodiments, the first preamble portion includes a target indicator field, and the modulation scheme of the target indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

[0209] In some embodiments, the target indicator field includes a first indicator field and a second indicator field, and the modulation scheme of the first indicator field and / or the second indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

[0210] In some embodiments, the modulation schemes for the first and second indicator fields are both quadrature two-phase shift modulation (Q-BPSK), or,

[0211] The modulation scheme of the first indicator field is Q-BPSK, and the modulation scheme of the second indicator field is two-phase shift modulation BPSK, or

[0212] The modulation scheme for the second indicator field is Q-BPSK, and the modulation scheme for the first indicator field is BPSK.

[0213] In some embodiments, the first preamble portion includes a legacy signal L-SIG field, and the modulation schemes of both the first and second indicator fields are Q-BPSK, or the modulation scheme of the first indicator field is BPSK and the modulation scheme of the second indicator field is Q-BPSK, in which case the values ​​of the first and second indicator fields and the value of the L-SIG field satisfy a predetermined relationship.

[0214] In some embodiments, the AMP portion includes a second preamble portion, the second preamble portion includes a first synchronization sequence, the first synchronization sequence is a synchronization sequence corresponding to an AMP device, and the first synchronization sequence is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0215] In some embodiments, the first preamble portion includes a first BPSK-labeled field and a second BPSK-labeled field, and the first synchronization sequence follows the first BPSK-labeled field and the second BPSK-labeled field.

[0216] In some embodiments, the first preamble portion includes a third indicator field, which is used to indicate that the first PPDU is a PPDU to be sent to an AMP device.

[0217] In some embodiments, the first preamble portion includes a first BPSK labeled field, a second BPSK labeled field, and the third labeled field, wherein the third labeled field is located after the first BPSK labeled field and the second BPSK labeled field.

[0218] In some embodiments, the modulation scheme of the third indicator field is BPSK or Q-BPSK.

[0219] In some embodiments, the number of symbols in the third indicator field belongs to set {1, 2, 3, 4}.

[0220] In some embodiments, the AMP portion includes a second preamble portion, the second preamble portion includes a fourth indicator field, the fourth indicator field is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0221] In some embodiments, the second preamble portion includes a second synchronization sequence and the fourth indicator field, the fourth indicator field being located after the second synchronization sequence.

[0222] In some embodiments, the modulation scheme of the fourth indicator field is BPSK or Q-BPSK.

[0223] In some embodiments, the number of symbols in the fourth indicator field belongs to set {1, 2, 3, 4}.

[0224] In some embodiments, the length field in the L-SIG field of the first preamble portion is used to indicate that the first PPDU is a PPDU to be sent to an AMP device.

[0225] In some embodiments, the remainder when the value of the length field is divided by 3 is not equal to 0.

[0226] In some embodiments, the AMP portion includes a media access control MAC portion, and the type field in the MAC header of the MAC portion is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0227] In some embodiments, the value of the type field being a reserved value is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0228] As one option, in some embodiments, the communication unit may be a communication interface or transceiver, or it may be a communication chip or a system-on-a-chip input / output interface. The processing unit may be one or more processors.

[0229] The AMP device 500 according to the embodiment of the present application can correspond to the AMP device in the method embodiment of the present application, and it should be understood that the above and other operations and / or functions of each unit in the AMP device 500 are for realizing the corresponding flow of the AMP device in the method shown in Figures 8 to 15, respectively. For the sake of brevity, a detailed explanation is omitted here.

[0230] Figure 17 shows a schematic block diagram of a non-ambient power generation AMP device 800 according to an embodiment of the present application. As shown in Figure 17, the non-AMP device 800 includes a non-ambient power generation AMP device, The non-ambient power generation AMP device receives a first physical layer protocol data unit PPDU, where the first PPDU includes a first preamble portion and an AMP portion. Based on the first preamble portion and / or the AMP portion, it is determined that the first PPDU is a PPDU to be sent to the AMP device.

[0231] In some embodiments, the first preamble portion includes a target indicator field, and the modulation scheme of the target indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

[0232] In some embodiments, the target indicator field includes a first indicator field and a second indicator field, and the modulation scheme of the first indicator field and / or the second indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

[0233] In some embodiments, the modulation schemes for the first and second indicator fields are both quadrature two-phase shift modulation (Q-BPSK), or,

[0234] The modulation scheme of the first indicator field is Q-BPSK, and the modulation scheme of the second indicator field is two-phase shift modulation BPSK, or

[0235] The modulation scheme for the second indicator field is Q-BPSK, and the modulation scheme for the first indicator field is BPSK.

[0236] In some embodiments, the first preamble portion includes a legacy signal L-SIG field, and the modulation schemes of both the first and second indicator fields are Q-BPSK, or the modulation scheme of the first indicator field is BPSK and the modulation scheme of the second indicator field is Q-BPSK, in which case the values ​​of the first and second indicator fields and the value of the L-SIG field satisfy a predetermined relationship.

[0237] In some embodiments, the AMP portion includes a second preamble portion, the second preamble portion includes a first synchronization sequence, the first synchronization sequence is a synchronization sequence corresponding to an AMP device, and the first synchronization sequence is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0238] In some embodiments, the first preamble portion includes a first BPSK-labeled field and a second BPSK-labeled field, and the first synchronization sequence follows the first BPSK-labeled field and the second BPSK-labeled field.

[0239] In some embodiments, the first preamble portion includes a third indicator field, which is used to indicate that the first PPDU is a PPDU to be sent to an AMP device.

[0240] In some embodiments, the first preamble portion includes a first BPSK labeled field, a second BPSK labeled field, and the third labeled field, wherein the third labeled field is located after the first BPSK labeled field and the second BPSK labeled field.

[0241] In some embodiments, the modulation scheme of the third indicator field is BPSK or Q-BPSK.

[0242] In some embodiments, the number of symbols in the third indicator field belongs to set {1, 2, 3, 4}.

[0243] In some embodiments, the AMP portion includes a second preamble portion, the second preamble portion includes a fourth indicator field, the fourth indicator field is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0244] In some embodiments, the second preamble portion includes a second synchronization sequence and the fourth indicator field, the fourth indicator field being located after the second synchronization sequence.

[0245] In some embodiments, the modulation scheme of the fourth indicator field is BPSK or Q-BPSK.

[0246] In some embodiments, the number of symbols in the fourth indicator field belongs to set {1, 2, 3, 4}.

[0247] In some embodiments, the length field in the L-SIG field of the first preamble portion is used to indicate that the first PPDU is a PPDU to be sent to an AMP device.

[0248] In some embodiments, the remainder when the value of the length field is divided by 3 is not equal to 0.

[0249] In some embodiments, the AMP portion includes a media access control MAC portion, and the type field in the MAC header of the MAC portion is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0250] In some embodiments, the value of the type field being a reserved value is used to indicate that the first PPDU is a PPDU to be sent to the AMP device.

[0251] As one option, in some embodiments, the communication unit may be a communication interface or transceiver, or it may be a communication chip or a system-on-a-chip input / output interface. The processing unit may be one or more processors.

[0252] The non-AMP device 800 according to the embodiment of the present application can correspond to the non-AMP device in the method embodiment of the present application, and it should be understood that the above and other operations and / or functions of each unit in the non-AMP device 800 are for realizing the corresponding flow of the non-AMP device in the method shown in Figures 8 to 15, respectively. For the sake of brevity, a detailed explanation is omitted here.

[0253] Figure 18 is a schematic diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 shown in Figure 18 includes a processor 610, which can call and execute a computer program from memory to implement the method in the embodiment of the present application.

[0254] As an option, the communication device 600 may further include a memory 620, as shown in Figure 18. Here, the processor 610 can call and execute a computer program from the memory 620 to implement the method in the embodiment of the present application.

[0255] Here, the memory 620 may be a separate device independent of the processor 610, or it may be integrated into the processor 610.

[0256] As an option, as shown in Figure 18, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically by transmitting information or data to other devices or receiving information or data transmitted from other devices.

[0257] Here, the transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include an antenna, and the number of antennas may be one or more.

[0258] As one option, the communication device 600 may specifically be the network device of the embodiment of the present application, and the communication device 600 can realize the corresponding flow realized by the network device in each method of the embodiment of the present application. For the sake of brevity, a detailed explanation is omitted here.

[0259] As one option, the communication device 600 may specifically be the AMP device of the embodiment of the present application, and the communication device 600 can realize the corresponding flow realized by the AMP device in each method of the embodiment of the present application. For the sake of brevity, a detailed explanation is omitted here.

[0260] As one option, the communication device 600 may specifically be a non-AMP device of the embodiment of the present application, and the communication device 600 can realize the corresponding flow realized by the non-AMP device in each method of the embodiment of the present application. For the sake of brevity, a detailed explanation is omitted here.

[0261] Figure 19 is a schematic diagram of the chip of an embodiment of the present application. The chip 700 shown in Figure 19 includes a processor 710 which can call and execute a computer program from memory to implement the method of the embodiment of the present application.

[0262] As an option, the chip 700 may further include memory 720, as shown in Figure 19. Here, the processor 710 can call and execute a computer program from memory 720 to implement the method in the embodiment of the present application.

[0263] Here, the memory 720 may be a separate device independent of the processor 710, or it may be integrated into the processor 710.

[0264] As an option, the chip 700 may further include an input interface 730, where the processor 710 can control the input interface 730 to communicate with other devices or chips, specifically, to acquire information or data transmitted from other devices or chips.

[0265] As an option, the chip 700 may further include an output interface 740. Here, the processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, it can output information or data to other devices or chips.

[0266] As one option, the chip can be applied to the network device in the embodiment of the present application, and the chip can realize the corresponding flow realized by the network device in each method of the embodiment of the present application. For the sake of brevity, a detailed explanation is omitted here.

[0267] As one option, the chip can be applied to the AMP device in the embodiment of the present application, and the chip can realize the corresponding flow realized by the AMP device in each method of the embodiment of the present application. For brevity, a detailed explanation is omitted here.

[0268] As one option, the chip can be applied to the non-AMP device in the embodiment of the present application, and the chip can realize the corresponding flow realized by the non-AMP device in each method of the embodiment of the present application, for the sake of brevity, a detailed explanation is omitted here.

[0269] It should be understood that the chips relating to the embodiments of this application may also be called system-level chips, system chips, chip systems, or system-on-a-chip.

[0270] Figure 20 is a schematic block diagram of a communication system 900 according to an embodiment of the present invention. As shown in Figure 20, the communication system 900 includes an ambient power generation AMP device 910, a network device 920, and a non-AMP device 930.

[0271] Here, the AMP device 910 is used to implement the corresponding function realized by the AMP device in the above method, the network device 920 is used to implement the corresponding function realized by the network device in the above method, and the non-AMP device 930 can be used to implement the corresponding function realized by the non-AMP device in the above method. For the sake of brevity, a detailed explanation is omitted here.

[0272] It should be understood that the exemplary processor of the present application may be an integrated circuit chip having signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by hardware integrated logic circuits or software-form instructions in the processor. The above processor may 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 device, a discrete gate or transistor logic device, or a discrete hardware component. Each method, step and logic block diagram disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor, or the processor may be any ordinary processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly implemented in a form that is executed and completed by a hardware decoder, or in a form that is executed and completed by a combination of hardware and software modules in the decoder. The software module may be placed in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, or registers. The storage medium is placed in memory, and the processor reads the information in memory and works with its hardware to complete the steps of the method described above.

[0273] It should be understood that the memory in the embodiments of this application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Here, non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or flash memory. Volatile memory may be random access memory (RAM), which is used as an external cache. For illustrative purposes only, and not limited to, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous-connected dynamic random access memory (Synchlink DRAM, SLDRAM), and direct memory bus random access memory (Direct Rambus RAM, DR RAM). The memories of the systems and methods described herein include, but are not limited to, these and any other suitable types of memory.

[0274] It should be understood that the above memory is exemplary and not limiting. For example, the memory in the embodiments of the present application may further include a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DR RAM), etc. Yo That is, the memory in the embodiments of the present application includes these and any other suitable types of memory, but is not limited thereto.

[0275] The embodiments of the present application further provide a computer-readable storage medium for storing a computer program.

[0276] As an option, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding flow realized by the network device in each method of the embodiments of the present application. For the sake of brevity, detailed description is omitted here.

[0277] As an option, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding flow realized by the mobile terminal / terminal device in each method of the embodiments of the present application. For the sake of brevity, detailed description is omitted here.

[0278] The embodiments of the present application further provide a computer program product that includes computer program instructions.

[0279] As one option, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding flow realized by the network device in each method of the embodiment of the present application, for the sake of brevity, a detailed explanation is omitted here.

[0280] As one option, the computer program product can be applied to the mobile terminal / terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding flow realized by the mobile terminal / terminal device in each method of the embodiment of the present application. For the sake of brevity, a detailed explanation is omitted here.

[0281] The embodiments of the present invention further provide a computer program.

[0282] As one option, the computer program can be applied to the network device in the embodiment of the present application, and when the computer program is executed on a computer, it causes the computer to execute the corresponding flow realized by the network device in each method of the embodiment of the present application. For brevity, a detailed explanation is omitted here.

[0283] As one option, the computer program can be applied to the mobile terminal / terminal device in the embodiment of the present application, and when the computer program is executed on a computer, it causes the computer to execute the corresponding flow realized by the mobile terminal / terminal device in each method of the embodiment of the present application. For brevity, a detailed explanation is omitted here.

[0284] Those skilled in the art will understand that the units and algorithmic steps of each example described in the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the proposed technology. Those skilled in the art may implement the described functions using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

[0285] Those skilled in the art will clearly understand, for the sake of convenience and brevity of explanation, that the specific operating processes of the systems, apparatus, and units described above can be referenced to the corresponding processes in the above-described embodiment of the method, and therefore, such explanations are omitted here.

[0286] In some embodiments of this application, it should be understood that the disclosed systems, apparatus and methods can be implemented in other ways. For example, the embodiments of the apparatus described above are illustrative only, and the division of the units is merely a logical functional division, and other division methods may be employed in actual implementations, for example, multiple units or components may be combined, integrated into other systems, or some features may be ignored or not performed. On the other hand, the mutual coupling or direct coupling or communication connection indicated or discussed may be an indirect coupling or communication connection of several interfaces, apparatus or units, and may be in electrical, mechanical or other forms.

[0287] The units described above as separate components may or may not be physically separate, and 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 these units can be selected as needed to achieve the objectives of the solution of this embodiment.

[0288] Furthermore, each functional unit in each embodiment of the present application may be integrated into a single processing unit, each unit may exist physically independently, or two or more units may be integrated into a single unit.

[0289] The aforementioned functions may be implemented in the form of a software function unit and, if sold or used as an independent product, may be stored on a computer-readable storage medium. Based on this understanding, the essence of the proposed technology of the present application, i.e., the part that contributes to the prior art or a part of the proposed technology, may be embodied in the form of a computer software product, which is stored on a storage medium and includes several instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The storage medium includes various media capable of storing program code, such as USB memory, portable hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0290] The foregoing describes only specific embodiments of the present application, and the scope of protection of the present application is not limited thereto. Any modifications or substitutions that a person skilled in the art could easily conceive within the technical scope disclosed herein should be included in the scope of protection. Accordingly, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A method of wireless communication, A network device transmits a first physical layer protocol data unit (PPDU), the first PPDU comprising a first preamble portion and an ambient power generation (AMP) portion, wherein the first PPDU is a PPDU transmitted to an AMP device. A method characterized by the following:

2. The method according to claim 1, wherein the first preamble portion includes a target indicator field, and the modulation scheme of the target indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

3. The method according to 2, wherein the target indicator field includes a first indicator field and a second indicator field, and the modulation scheme of the first indicator field and / or the second indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

4. The modulation schemes for both the first and second indicator fields are quadrature two-phase shift modulation (Q-BPSK), or, The modulation scheme for the first indicator field is Q-BPSK, and the modulation scheme for the second indicator field is two-phase shift modulation BPSK, or The modulation scheme of the second indicator field is Q-BPSK, and the modulation scheme of the first indicator field is BPSK. The method according to feature 3.

5. The method according to 4, characterized in that the first preamble portion includes a legacy signal L-SIG field, and the modulation schemes of both the first indicator field and the second indicator field are Q-BPSK, or the modulation scheme of the first indicator field is BPSK and the modulation scheme of the second indicator field is Q-BPSK, the values ​​of the first indicator field and the second indicator field and the value of the L-SIG field satisfy a predetermined relationship.

6. The method according to any one of claims 1 to 5, wherein the AMP portion includes a second preamble portion, the second preamble portion includes a first synchronization sequence, the first synchronization sequence is a synchronization sequence corresponding to an AMP device, and the first synchronization sequence is used to indicate that the first PPDU is a PPDU to be transmitted to the AMP device.

7. The method according to 6, characterized in that the first preamble portion includes a first BPSK labeled field and a second BPSK labeled field, and the first synchronization sequence follows the first BPSK labeled field and the second BPSK labeled field.

8. The method according to any one of claims 1 to 7, wherein the first preamble portion includes a third indicator field, the third indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

9. The method according to 8, characterized in that the first preamble portion includes a first BPSK labeled field, a second BPSK labeled field, and the third labeled field, wherein the third labeled field is located after the first BPSK labeled field and the second BPSK labeled field.

10. The method according to 8 or 9, characterized in that the modulation scheme of the third indicator field is BPSK or Q-BPSK.

11. The method according to any one of claims 8 to 10, characterized in that the number of symbols in the third indicator field belongs to the set {1, 2, 3, 4}.

12. The method according to any one of claims 1 to 7, wherein the AMP portion includes a second preamble portion, the second preamble portion includes a fourth indicator field, the fourth indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

13. The method according to 12, characterized in that the second preamble portion includes a second synchronization sequence and the fourth indicator field, the fourth indicator field being after the second synchronization sequence.

14. The method according to 12 or 13, characterized in that the modulation scheme of the fourth indicator field is BPSK or Q-BPSK.

15. The method according to any one of claims 12 to 14, characterized in that the number of symbols in the fourth indicator field belongs to the set {1, 2, 3, 4}.

16. The method according to any one of claims 1 to 15, characterized in that the length field in the L-SIG field of the first preamble portion is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

17. The method according to 16, characterized in that the remainder when the value of the length field is divided by 3 is not equal to 0.

18. The method according to any one of claims 1 to 17, wherein the AMP portion includes a media access control MAC portion, and the type field in the MAC header of the MAC portion is used to indicate that the first PPDU is a PPDU to be sent to an AMP device.

19. The method according to 18, characterized in that the value of the type field being a reserved value is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

20. A method of wireless communication, The ambient power generation AMP device receives a first physical layer protocol data unit (PPDU), and the first PPDU includes a first preamble portion and the AMP portion. A method characterized by the following:

21. The method according to 20, wherein the first preamble portion includes a target indicator field, and the modulation scheme of the target indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

22. The method according to 21, wherein the target indicator field includes a first indicator field and a second indicator field, and the modulation scheme of the first indicator field and / or the second indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

23. The modulation schemes for both the first and second indicator fields are quadrature two-phase shift modulation (Q-BPSK), or, The modulation scheme for the first indicator field is Q-BPSK, and the modulation scheme for the second indicator field is two-phase shift modulation BPSK, or The modulation scheme of the second indicator field is Q-BPSK, and the modulation scheme of the first indicator field is BPSK. The method according to the feature of 22.

24. The method according to 23, characterized in that the first preamble portion includes a legacy signal L-SIG field, and the modulation schemes of both the first indicator field and the second indicator field are Q-BPSK, or the modulation scheme of the first indicator field is BPSK and the modulation scheme of the second indicator field is Q-BPSK, the values ​​of the first indicator field and the second indicator field and the value of the L-SIG field satisfy a predetermined relationship.

25. The method according to any one of claims 20 to 24, wherein the AMP portion includes a second preamble portion, the second preamble portion includes a first synchronization sequence, the first synchronization sequence is a synchronization sequence corresponding to an AMP device, and the first synchronization sequence is used to indicate that the first PPDU is a PPDU to be transmitted to the AMP device.

26. The method according to 25, characterized in that the first preamble portion includes a first BPSK labeled field and a second BPSK labeled field, and the first synchronization sequence follows the first BPSK labeled field and the second BPSK labeled field.

27. The method according to any one of claims 20 to 26, wherein the first preamble portion includes a third indicator field, the third indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

28. The method according to 27, characterized in that the first preamble portion includes a first BPSK labeled field, a second BPSK labeled field, and the third labeled field, wherein the third labeled field is located after the first BPSK labeled field and the second BPSK labeled field.

29. The method according to 27 or 28, characterized in that the modulation scheme of the third indicator field is BPSK or Q-BPSK.

30. The method according to any one of claims 27 to 29, characterized in that the number of symbols in the third indicator field belongs to the set {1, 2, 3, 4}.

31. The method according to any one of claims 20 to 26, wherein the AMP portion includes a second preamble portion, the second preamble portion includes a fourth indicator field, the fourth indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

32. The method according to 31, characterized in that the second preamble portion includes a second synchronization sequence and a fourth indicator field, the fourth indicator field being after the second synchronization sequence.

33. The method according to 31 or 32, characterized in that the modulation scheme of the fourth indicator field is BPSK or Q-BPSK.

34. The method according to any one of claims 31 to 33, characterized in that the number of symbols in the fourth indicator field belongs to the set {1, 2, 3, 4}.

35. The method according to any one of claims 20 to 34, characterized in that the length field in the L-SIG field of the first preamble portion is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

36. The method according to 35, characterized in that the remainder when the value of the length field is divided by 3 is not equal to 0.

37. The method according to any one of claims 20 to 36, wherein the AMP portion includes a media access control MAC portion, and the type field in the MAC header of the MAC portion is used to indicate that the first PPDU is a PPDU to be sent to an AMP device.

38. The method according to 37, characterized in that the value of the type field is a reserved value and is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

39. A method of wireless communication, A non-ambient power generation AMP device receives a first physical layer protocol data unit (PPDU), wherein the first PPDU includes a first preamble portion and an AMP portion. Based on the first preamble portion and / or the AMP portion, it is determined that the first PPDU is a PPDU to be transmitted to an AMP device, including, A method characterized by the following:

40. The method according to 39, wherein the first preamble portion includes a target indicator field, and the modulation scheme of the target indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

41. The method according to 40, wherein the target indicator field includes a first indicator field and a second indicator field, and the modulation scheme of the first indicator field and / or the second indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

42. The modulation schemes for both the first and second indicator fields are quadrature two-phase shift modulation (Q-BPSK), or, The modulation scheme for the first indicator field is Q-BPSK, and the modulation scheme for the second indicator field is two-phase shift modulation BPSK, or The modulation scheme of the second indicator field is Q-BPSK, and the modulation scheme of the first indicator field is BPSK. The method according to feature 41.

43. The method according to 42, characterized in that the first preamble portion includes a legacy signal L-SIG field, and the modulation schemes of both the first indicator field and the second indicator field are Q-BPSK, or the modulation scheme of the first indicator field is BPSK and the modulation scheme of the second indicator field is Q-BPSK, the values ​​of the first indicator field and the second indicator field and the value of the L-SIG field satisfy a predetermined relationship.

44. The method according to any one of claims 39 to 43, wherein the AMP portion includes a second preamble portion, the second preamble portion includes a first synchronization sequence, the first synchronization sequence is a synchronization sequence corresponding to an AMP device, and the first synchronization sequence is used to indicate that the first PPDU is a PPDU to be transmitted to the AMP device.

45. The method according to 44, characterized in that the first preamble portion includes a first BPSK-labeled field and a second BPSK-labeled field, and the first synchronization sequence follows the first BPSK-labeled field and the second BPSK-labeled field.

46. The method according to any one of claims 39 to 45, wherein the first preamble portion includes a third indicator field, the third indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

47. The method according to 46, characterized in that the first preamble portion includes a first BPSK labeled field, a second BPSK labeled field, and the third labeled field, wherein the third labeled field is located after the first BPSK labeled field and the second BPSK labeled field.

48. The method according to 46 or 47, characterized in that the modulation scheme of the third indicator field is BPSK or Q-BPSK.

49. The method according to any one of claims 46 to 48, characterized in that the number of symbols in the third indicator field belongs to the set {1, 2, 3, 4}.

50. The method according to any one of claims 39 to 45, wherein the AMP portion includes a second preamble portion, the second preamble portion includes a fourth indicator field, the fourth indicator field is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

51. The method according to 50, characterized in that the second preamble portion includes a second synchronization sequence and the fourth indicator field, the fourth indicator field being after the second synchronization sequence.

52. The method according to 50 or 51, characterized in that the modulation scheme of the fourth indicator field is BPSK or Q-BPSK.

53. The method according to any one of claims 12 to 14, characterized in that the number of symbols in the fourth indicator field belongs to the set {1, 2, 3, 4}.

54. The method according to any one of claims 39 to 53, characterized in that the length field in the L-SIG field of the first preamble portion is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

55. The method according to 54, characterized in that the remainder when the value of the length field is divided by 3 is not equal to 0.

56. The method according to any one of claims 39 to 55, wherein the AMP portion includes a media access control MAC portion, and the type field in the MAC header of the MAC portion is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

57. The method according to 56, characterized in that the value of the type field being a reserved value is used to indicate that the first PPDU is a PPDU to be transmitted to an AMP device.

58. The system includes a communication unit for transmitting a first physical layer protocol data unit (PPDU), the first PPDU comprising a first preamble portion and an ambient power generation (AMP) portion, wherein the first PPDU is a PPDU transmitted to an AMP device. A network device characterized by the following features.

59. Includes a communication unit for receiving a first physical layer protocol data unit (PPDU), the first PPDU including a first preamble portion and the AMP portion, An ambient power generation AMP device characterized by the following features.

60. It includes a communication unit and a processing unit, The communication unit is used to receive a first physical layer protocol data unit (PPDU), wherein the first PPDU includes a first preamble portion and an AMP portion. The processing unit is used to determine, based on the first preamble portion and / or the AMP portion, that the first PPDU is a PPDU to be transmitted to an AMP device. A non-ambient power generation AMP device characterized by the following:

61. A network device comprising a processor and memory, wherein the memory is used to store computer programs, and the processor is used to call and execute the computer programs stored in the memory in order to perform the method according to any one of claims 1 to 19.

62. An ambient power generation AMP device comprising a processor and memory, wherein the memory is used to store a computer program, and the processor is used to call and execute the computer program stored in the memory in order to perform the method according to any one of claims 20 to 38.

63. A non-ambient power generation AMP device comprising a processor and memory, wherein the memory is used to store a computer program, and the processor is used to call and execute the computer program stored in the memory in order to perform the method according to any one of claims 39 to 57.

64. A chip comprising a processor, wherein the processor is used to call and execute a computer program from memory to cause a device to which the chip is attached to perform the method according to any one of claims 1 to 19, or the method according to any one of claims 20 to 38, or the method according to any one of claims 39 to 57.

65. A computer-readable storage medium used for storing a computer program, wherein the computer program causes the computer to execute the method according to any one of claims 1 to 19, or the method according to any one of claims 20 to 38, or the method according to any one of claims 39 to 57.

66. A computer program product comprising a computer program instruction, wherein the computer program instruction causes a computer to execute the method according to any one of claims 1 to 19, or the method according to any one of claims 20 to 38, or the method according to any one of claims 39 to 57.

67. A computer program, characterized in that the computer program causes a computer to execute the method described in any one of claims 1 to 19, or the method described in any one of claims 20 to 38, or the method described in any one of claims 39 to 57.

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