Wireless communication method, network device, and ambient power enabled (AMP) device

Abstract

A wireless communication method, a network device, and an ambient power enabled (AMP) device are provided, the method including: a network device transmitting a first signal including system parameter update information to an ambient power enabled (AMP) device;

Description

[Technical Field]

[0001] TECHNICAL FIELD Embodiments of the present application relate to the field of communications, and in particular to a wireless communication method, a network device, and an ambient power enabled (AMP) device. [Background technology]

[0002] In zero-power communication, a zero-power device needs to obtain energy through energy harvesting before communicating with a network device. In a communication system, a terminal device needs to periodically receive common control information from a network device. Communication between a zero-power device and a network device is affected by the energy state of the zero-power device, so it is not suitable for the zero-power device to frequently receive information from the network device. Therefore, when a zero-power device is introduced into a communication system, how to receive common control information is an urgent issue that needs to be resolved. Summary of the Invention

[0003] In the present application, a wireless communication method, a network device, and an ambient power enabled (AMP) device are provided, in which a zero-power device can receive system information based on system parameter update information from a network device, which is beneficial to reducing the power consumption of the zero-power device.

[0004] In a first aspect, a wireless communication method is provided, the method including: a network device transmitting a first signal including system parameter update information to an ambient power enabled (AMP) device;

[0005] In a second aspect, a wireless communication method is provided, the method including: an ambient power enabled (AMP) device receives a first signal transmitted by a network device, the first signal including system parameter update information.

[0006] In a third aspect, there is provided a terminal device configured to perform the method of the first aspect or any of its embodiments, in particular the terminal device comprises functional units configured to perform the method of the first aspect or any of its embodiments.

[0007] In a fourth aspect, there is provided a network device configured to perform the method of the second aspect or any of its embodiments, specifically comprising functional units configured to perform the method of the second aspect or any of its embodiments.

[0008] In a fifth aspect, there is provided a terminal device, the terminal device comprising a processor and a memory, the memory configured to store a computer program, the processor configured to call and execute the computer program stored in the memory to perform the method of the first aspect or any embodiment thereof.

[0009] In a sixth aspect, there is provided a network device, the network device comprising a processor and a memory, the memory configured to store a computer program, the processor configured to access and execute the computer program stored in the memory to perform the method of the second aspect or any embodiment thereof.

[0010] In a seventh aspect, there is provided a chip configured to perform the method of the first or second aspect or each embodiment of the first or second aspect. Specifically, the chip includes a processor configured to call and execute a computer program stored in a memory to cause a device equipped with the chip to perform the method of the first or second aspect or each embodiment of the first or second aspect.

[0011] In an eighth aspect, there is provided a computer-readable storage medium configured to store a computer program, the computer program being configured to cause a computer to perform the method of the first or second aspect or an embodiment of the first or second aspect.

[0012] In a ninth aspect, there is provided a computer program product, the computer program product comprising computer program instructions configured to cause a computer to perform the method of the first or second aspect, or an embodiment of the first or second aspect.

[0013] In a tenth aspect, there is provided a computer program which, when executed on a computer, is configured to cause the computer to carry out the method of the first or second aspect, or an embodiment of the first or second aspect.

[0014] According to the above technical solution, the network device can indicate system parameter update information to the AMP device, and the AMP device can receive system parameters based on the system parameter update information. For example, if there is no update to the system parameters, the AMP device will not receive the system parameters, which is beneficial to energy saving of the AMP device. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram illustrating a communication system architecture according to an embodiment of the present application. [Figure 2] FIG. 2 is a schematic diagram illustrating a zero power communication system according to an example of the present application. [Figure 3] FIG. 3 is a principle diagram illustrating energy collection according to an embodiment of the present application. [Figure 4] FIG. 4 is a principle diagram showing back-scattering communication according to an embodiment of the present application. [Figure 5] FIG. 5 is a circuit diagram illustrating resistive load modulation according to an embodiment of the present application. [Figure 6] FIG. 6 is a schematic diagram illustrating the format of a physical layer protocol data unit (PPDU). [Figure 7] FIG. 7 is a schematic diagram showing the format of the data portion of the PPDU. [Figure 8] FIG. 8 is a schematic diagram showing the format of the frame control portion in a Media Access Control (MAC) header in a PPDU. [Figure 9] FIG. 9 is a schematic diagram illustrating a wireless communication method according to an embodiment of the present application. [Figure 10] FIG. 10 is a schematic diagram illustrating a format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 11] FIG. 11 is a schematic diagram illustrating another format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 12] FIG. 12 is a schematic diagram illustrating another format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 13]FIG. 13 is a schematic diagram illustrating another format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 14] FIG. 14 is a schematic diagram illustrating another format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 15] FIG. 15 is a schematic diagram illustrating another format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 16] FIG. 16 is a schematic diagram illustrating another format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 17] FIG. 17 is a schematic diagram illustrating another format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 18] FIG. 18 is a schematic diagram illustrating another format of a PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 19] FIG. 19 is a schematic diagram illustrating another format of the data portion of the PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 20] FIG. 20 is a schematic diagram illustrating another format of the data portion of the PPDU for carrying system parameter update information according to an embodiment of the present application. [Figure 21] FIG. 21 is a block diagram illustrating a network device according to an embodiment of the present application. [Figure 22] FIG. 22 is a block diagram illustrating an AMP device according to an embodiment of the present application. [Figure 23] FIG. 23 is a block diagram illustrating a communication device according to an embodiment of the present application. [Figure 24] FIG. 24 is a block diagram illustrating a chip according to an embodiment of the present application. [Figure 25] FIG. 25 is a block diagram illustrating a communication system according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, the technical solutions of the embodiments of the present application will be described with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments that can be obtained by those skilled in the art without creative efforts all belong to the protection scope of the present application.

[0017] The technical solutions of the embodiments of the present application can be applied to various types of communication systems. For example, global system for 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, evolved new radio 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), wireless fidelity (WiFi), and 5th generation (5th generation) networks. The present invention may be applied to a cellular Internet of Things (IoT) system, a cellular passive IoT system, or other communication system.

[0018] Generally speaking, the connections supported by conventional communication systems are easy to implement but limited in number. However, with the development of communication technology, mobile communication systems not only support conventional communication, but also support device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, vehicle-to-everything (V2X) communication, etc. Embodiments of the present application can be applied to these communication systems.

[0019] Optionally, the communication system in the embodiments of the present application can be applied to a carrier aggregation (CA) scenario, can also be applied to a dual connectivity (DC) scenario, and can also be applied to a standalone (SA) networking scenario.

[0020] Alternatively, the communication system in the embodiments of the present application may be applied to an unlicensed spectrum, which may be considered to be a shared spectrum, or the communication system in the embodiments of the present application may be applied to a licensed spectrum, which may be considered to be a non-shared spectrum.

[0021] In the embodiments of the present application, a network device and a terminal device are combined to describe each embodiment. The terminal device may also be called user equipment (UE), access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment.

[0022] In an embodiment of the present application, the network device may be used to communicate with a mobile device, and may be an access point (AP) in a WLAN, a base transceiver station (BTS) in a GSM or CDMA, a Node B (NB) in a WCDMA, an evolutionary Node B (eNB or eNodeB) in an LTE, a relay station, an access point, an in-vehicle device, a wearable device, a generation Node B (gNB) in an NR network, a network device in a cellular IoT, a network device in a cellular passive IoT, a network device in a future evolved Public Land Mobile Network (PLMN) network, or a network device in an NTN network, etc.

[0023] By way of example and not limitation, in embodiments of the present application, the network device may have mobile characteristics, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon 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, a Highly Elliptical Orbit (HEO) satellite, etc. Optionally, the network device may be a base station located in a location such as on land or water.

[0024] In an embodiment of the present application, a network device provides a service to a cell, and a terminal device communicates with the network device via a transmission resource (e.g., a frequency domain resource or a spectrum resource) 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 a base station corresponding to a small cell. Small cells may include metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-speed data transmission services.

[0025] The terminal device may be a station (ST) in a WLAN, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a next generation communication system, such as an NR network, or a terminal device in a future evolved PLMN network, a terminal device in cellular IoT, a terminal device in cellular passive IoT, etc.

[0026] In embodiments of the present application, the terminal device may be deployed on land (e.g., handheld, wearable, vehicle-mounted, etc.), including indoors and outdoors, on water (e.g., ships, etc.), or in the air (e.g., airplanes, balloons, satellites, etc.).

[0027] In an embodiment of the present application, the terminal device may be a mobile phone, a tablet computer (Pad), 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 telemedicine, 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, etc.

[0028] For example and not limitation, in the embodiments of the present application, the terminal device may be a wearable device. A wearable device, also known as a wearable smart device, is a collective term for wearable devices developed by applying wearable technology to intelligently design everyday clothing such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that can be worn directly on a user's body or integrated into a user's clothing or accessories. A wearable device is not only a hardware device, but can also achieve powerful functions through software support, data interaction, and cloud interaction. In a broad sense, a wearable smart device includes devices with full functionality and large size that can achieve all or part of their functions without relying on a smartphone (e.g., smart watches, smart glasses, etc.), as well as devices that focus only on specific application functions and need to be used in conjunction with other devices such as smartphones (e.g., any smart bracelet for vital sign monitoring, smart jewelry, etc.).

[0029] Illustratively, a communication system 100 applied to an embodiment of the present application is as shown in Fig. 1. The communication system 100 may include a network device 110, which may be a device that communicates with terminal devices 120 (or communication terminals, also referred to as terminals). The network device 110 provides communication coverage to a specific geographic area and can communicate with terminal devices within the coverage area.

[0030] 1 exemplarily illustrates one network device and two terminal devices. Alternatively, the communication system 100 may include multiple network devices and other numbers of terminal devices within the coverage area of ​​each network device. The embodiments of the present application are not limited thereto.

[0031] Optionally, the communication system 100 may further include other network entities, such as a network controller, a mobile management entity, etc. The embodiments of the present application are not limited thereto.

[0032] Note that a device having a communication function in a network / system according to an embodiment of the present application may be referred to as a communication system. The communication system 100 shown in FIG. 1 will be described as an example. The communication device may include a network device 110 and a terminal device 120 having a communication function. The network device 110 and the terminal device 120 may be the specific devices described above, and will not be repeated here. The communication device may also include other devices in the communication system 100, such as other network entities, such as a network controller and a mobile management entity. The embodiment of the present application is not limited thereto.

[0033] It should be understood that the terms "system" and "network" are always used interchangeably herein. In this specification, the term "and / or" simply describes the relationship between related objects and indicates the existence of three types of relationships. For example, A and / or B indicates three situations: the presence of only A, the simultaneous presence of A and B, and the presence of only B. Also, in this specification, the symbol " / " generally indicates that the related objects before and after it are in an "or" relationship.

[0034] It should be understood that the "indicate" referred to in the embodiments of the present application may be a direct indication, an indirect indication, or an indication that there is an associative relationship. For example, when A indicates B, it may mean that A directly indicates B (e.g., B can be obtained by A), or that A indirectly indicates B (e.g., A indicates C, and B can be obtained by C), or that there is an associative relationship between A and B.

[0035] In describing the embodiments of the present application, the term "corresponding" may mean that there is a direct or indirect corresponding relationship between the two, or that there is an association relationship between the two, or that there is a relationship such as a directing and a directed, or a setting and a set.

[0036] In the embodiments of the present application, "predefined" may be realized by pre-storing a corresponding code or a corresponding table in a device (including, for example, a terminal device and a network device), or by other methods that can be used to indicate related information, and the present application does not limit the specific implementation method. For example, "predefined" may mean being defined in a protocol.

[0037] In the embodiments of the present application, the term "protocol" may refer to a standard protocol in the communication field. Examples include an LTE protocol, an NR protocol, and related protocols applied to future communication systems. The present application is not limited thereto.

[0038] In order to easily understand the technical solutions of the embodiments of the present application, the related art of the present application will be described.

[0039] 1. Zero-power communication

[0040] The key technologies for zero-power communication include energy (or power) harvesting, backscattering communication and low-power technology.

[0041] As shown in FIG. 2, a typical zero-power communication system (e.g., a Radio Frequency Identification (RFID) system) includes a network device (e.g., a reader / writer in an RFID system) and a zero-power device (e.g., an electronic tag). The network device is used to transmit wireless power supply signals and downlink communication signals to the zero-power device and to receive backscattered signals from the zero-power device. A basic zero-power device includes an energy collection module, a backscattered communication module, and a low-power computing module. The zero-power device may also include a memory and sensors for storing some basic information (such as item identification information) and sensing data such as environmental temperature and humidity.

[0042] For example, the energy collection module collects energy carried by radio waves in space (e.g., radio waves transmitted by the network device in FIG. 2) to power the low-power computing module of the 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 via backscattering based on the control signaling. The transmitted data can be data stored in the zero-power device itself (e.g., product identification information such as manufacturing date, brand, and manufacturer, or pre-programmed information). The zero-power device can be equipped with various types of sensors and report data collected by the sensors based on the zero-power mechanism.

[0043] Below, we will explain the key technologies in zero-power communication.

[0044] 1. Radio Frequency (RF) Power Harvesting

[0045] As shown in Figure 3, the radio frequency energy harvesting module harvests energy from electromagnetic waves in space based on the principle of electromagnetic induction to obtain the energy required to operate the zero power device, such as the low power demodulation and modulation module, sensors, and memory access. Therefore, the zero power device does not require a conventional battery.

[0046] 2. Backscattering communication

[0047] As shown in Figure 4, a zero-power device receives a carrier signal transmitted from a network device, modulates the carrier signal, loads the information to be transmitted, and then radiates the modulated signal from an antenna. This information transmission process is called backscatter communication. Backscattering is closely related to load modulation. In load modulation, the circuit parameters of the zero-power device's oscillator circuit are adjusted and controlled according to the tempo of the data stream, thereby changing parameters such as the impedance of the zero-power device to complete the modulation process. Load modulation techniques mainly include resistive load modulation and capacitive load modulation. As shown in Figure 5, in resistive load modulation, a load is connected in parallel with a resistor, which is turned on or off according to the control of a binary data stream. Turning the resistor on or off changes the voltage in the circuit, thereby realizing amplitude shift keying (ASK). That is, signal modulation and transmission are achieved by adjusting the amplitude of the backscatter signal from the zero-power device. Similarly, in capacitive load modulation, the resonant frequency of the circuit can be changed by switching a capacitor on and off, achieving Frequency Shift Keying (FSK) modulation, i.e., signal modulation and transmission can be achieved by adjusting the operating frequency of the backscattered signal of a zero-power device.

[0048] In this way, the zero-power device modulates the incoming wave signal by load modulation to realize the backscattering communication process, so the zero-power device has the following significant advantages: (1) Since it does not transmit signals spontaneously, it does not require complex radio frequency links such as power amplifiers (PAs) and radio frequency filters. (2) Since there is no need to generate a high-frequency signal spontaneously, there is no need for a high-frequency crystal oscillator. (3) Backscatter communication allows a terminal to transmit a signal without consuming any energy from the terminal itself.

[0049] 3, encoding technology

[0050] Data transmitted by zero-power devices can represent binary "1" and "0" digits using different forms of code. Radio frequency identification (RFID) systems typically utilize one of several encoding methods, including non-return to zero (NRZ) encoding, Manchester encoding, unipolar return-to-zero (RZ) encoding, differential biphase (DBP) encoding, differential encoding, pulse interval coding (PIE), bi-phase space coding (FM0), Miller encoding, and differential encoding. Generally speaking, different encoding techniques use different pulse signals to represent 0 and 1.

[0051] In some scenarios, according to the energy source and usage manner of the zero-power device, the zero-power device can be classified into the following types:

[0052] 1. Passive zero-power device

[0053] A zero-power device (e.g., an electronic tag in an RFID system) does 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 formed by radiation from the antenna of the network device. 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 realizes operations such as demodulating the forward link signal and modulating the backward link (also called the reflected link) signal. For the backscattering link, the zero-power device transmits signals using a backscattering method.

[0054] As can be seen from the above, no battery is required to operate a passive zero-power device, whether it is a forward link or a backward link. A passive zero-power device is a truly zero-power device.

[0055] Passive zero-power devices do not require batteries, and both the RF circuitry and baseband circuitry are extremely simple, eliminating the need for components such as a low-noise amplifier (LNA), power amplifier (PA), crystal oscillator, or analog-to-digital converter (ADC). As a result, they have many advantages, including small size, light weight, low cost, and long life.

[0056] 2. Semi-passive zero-power device

[0057] Although the semi-passive zero-power device does not have a conventional battery, it can collect radio wave energy using an RF energy collection module and store the collected energy in an energy storage unit (e.g., a capacitor). After obtaining the energy, the energy storage unit can power the low-power chip circuit of the zero-power device, thereby achieving operations such as demodulating the forward link signal and modulating the reverse link signal. For the backscattering link, the zero-power device uses a backscattering method to transmit signals.

[0058] As can be seen from the above, neither the forward link nor the backward link requires a built-in battery to operate the semi-passive zero-power device. During operation, the energy stored in the capacitor is used, and the energy comes from the radio wave energy harvested by the energy harvesting module. Therefore, the semi-passive zero-power device is also a zero-power device in the true sense.

[0059] Semi-passive zero-power devices inherit many of the advantages of passive zero-power devices, and therefore have many advantages such as small size, light weight, low cost, and long life.

[0060] 3. Active zero-power device

[0061] The zero-power device used in some scenarios may be an active zero-power device. This type of device may have a built-in battery. The battery is used to power the low-power chip circuit of the zero-power device, thereby achieving operations such as demodulating the forward link signal and modulating the reverse link signal. However, for the reverse link, the zero-power device utilizes a backscattering implementation method for signal transmission. Therefore, the zero-power nature of this type of device is mainly reflected in the fact that the transmission of the reverse link signal does not require power from the terminal itself, but is achieved using a backscattering implementation method.

[0062] Second, cellular passive IoT

[0063] As the number of applications in the 5G industry increases, the types of connected objects and application scenarios will increase, placing higher demands on the cost and power consumption of communication terminals. The application of battery-free, low-cost passive IoT devices will become a key technology for cellular IoT, and as the number and types of terminals connected to 5G networks increase, the Internet of Everything (IoE) will truly be realized. Passive IoT devices can be based on zero-power communication technologies such as RFID technology, and will be further extended to be applied to cellular IoT.

[0064] To facilitate understanding of the embodiments of the present application, a power supply signal, a scheduling signal, and a carrier signal related to zero power communication will be described.

[0065] 1. Power supply signal

[0066] The power supply signal is the energy source from which the zero-power device harvests energy.

[0067] The power supply signal may be transmitted by a base station, a smartphone, a smart gateway, a charging station, a micro base station, etc.

[0068] Regarding the frequency band, the frequency band of the radio waves for power supply may be low frequency, medium frequency, high frequency, or the like.

[0069] Regarding the waveform, the radio wave for power supply may be a sine wave, a square wave, a triangular wave, a pulse, a rectangular wave, or the like.

[0070] The power supply signal may be a continuous wave or a discontinuous wave (that is, interruptions are permitted for a certain period of time).

[0071] Alternatively, the power supply signal may be an existing signal in the 3GPP standard, such as a sounding reference signal (SRS), a physical uplink shared channel (PUSCH), a physical random access channel (PRACH), a physical uplink control channel (PUCCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), etc. Alternatively, the power supply signal may be a wireless fidelity (WIFI) signal or a Bluetooth signal.

[0072] Alternatively, the power supply signal may be realized by a newly added signal, for example, a signal dedicated to power supply may be newly added.

[0073] 2. Scheduling signal (also called trigger signal)

[0074] The trigger signal is used to trigger or schedule the zero power device to transmit data.

[0075] The trigger signal may be transmitted by a base station, a smartphone, a smart gateway, etc.

[0076] Regarding the frequency band, the frequency band of the radio wave for triggering or scheduling may be low frequency, medium frequency, high frequency, etc.

[0077] Regarding waveforms, the radio waves for triggering or scheduling may be sine waves, square waves, triangle waves, pulses, rectangular waves, etc.

[0078] The trigger signal may be a continuous wave or a discontinuous wave (i.e., interruptions are permitted for a certain period of time).

[0079] Alternatively, the trigger signal may be an existing signal in the 3GPP standard, such as SRS, PUSCH, PRACH, PUCCH, PDCCH, PDSCH, PBCH, or a WIFI signal, Bluetooth signal, etc.

[0080] Alternatively, the trigger signal may be realized by a newly added signal, for example a signal dedicated to triggering or scheduling.

[0081] 3. Carrier signal

[0082] The carrier signal is used by the zero-power device to generate the backscatter signal, for example, the zero-power device can modulate the received carrier signal according to the information that needs to be transmitted to form the backscatter signal.

[0083] The carrier signal may be transmitted by a base station, a smartphone, a smart gateway, etc.

[0084] Regarding the frequency band, the frequency band of the radio wave for the carrier signal may be low frequency, medium frequency, high frequency, etc.

[0085] Regarding waveform, the wave for the carrier signal may be a sine wave, a square wave, a triangular wave, a pulse, a rectangular wave, and the like.

[0086] Furthermore, the carrier signal may be a continuous wave or a discontinuous wave (i.e., interruptions are permitted for certain periods).

[0087] Alternatively, the carrier signal may be an existing signal in the 3GPP standard, such as SRS, PUSCH, PRACH, PUCCH, PDCCH, PDSCH, PBCH, or a WIFI signal, Bluetooth signal, etc.

[0088] Alternatively, the carrier signal may be realized by an additional signal, for example a dedicated carrier signal for generating the backscattered signal.

[0089] In the embodiment of the present application, the power supply signal, the scheduling signal, and the carrier signal may be the same signal or different signals. For example, the power supply signal may be a carrier signal, and the scheduling signal may be a carrier signal.

[0090] In some scenarios, since zero-power devices have the characteristics of being battery-free and low-cost, mass deployment and maintenance-free of a large number of zero-power devices can be supported in communication systems (e.g., NR systems, WIFI systems, etc.).

[0091] In some scenarios, ambient power-based IoT devices, such as ambient power enabled IoT (abbreviated as ambient IoT or AMP IoT), are considered to be supported in the communication system. Ambient IoT devices can refer to IoT devices that utilize various types of environmental energy, such as radio frequency energy, light energy, solar energy, thermal energy, and mechanical energy. This type of device is similar to a passive or semi-passive device in zero-power communication.

[0092] In 802.11 technology, Wi-Fi devices transmit information based on the Physical Layer Protocol Data Unit (PPDU) frame. The PPDU frame includes a physical layer header and a data portion. As shown in Figure 6, in 802.11a / g, the physical layer header of the PPDU frame includes a short training field (STF), a long training field (LTF), and a signal (SIG) field. The STF mainly consists of 10 short symbols (t1 to t10), each 0.8 µs long. Each symbol mainly performs various functions, including frame synchronization and coarse frequency synchronization. The main functions performed by t1 to t7 include signal detection, auto gain control (AGC), and diversity selection. The functions performed by t8 to t10 include coarse frequency (Coarse Frequency), offset estimation, and timing synchronization. The LTF is mainly used to realize fine frequency synchronization and channel estimation. The SIG portion carries information related to the data portion, including the data transmission rate, data packet length information, reserved bits, and tail bits.

[0093] As shown in Figure 7, a Media Access Control (MAC) frame is carried in the data portion of the PPDU. The frame format of the MAC frame can include a MAC header, a frame body, and a frame check sequence (FCS). The frame body field is used to carry information to be transmitted or received. The FCS field contains a 32-bit cyclic redundancy check (CRC) and is used for error detection.

[0094] Figure 8 shows the format of the Frame control section of the MAC header. As shown in Figure 8, the following information sections may be included:

[0095] 1. Protocol Version: Protocol Version is used to indicate the protocol version of the PPDU, for example, its value is 0 or 1.

[0096] 2. Type: Type is used to indicate the frame type of the PPDU frame, and may be, for example, one of a control frame, a management frame, and a data frame. a) Control frames are used for handshake communication and positive acknowledgment during contention periods, and for the end of a contention-free period (CFP). b) Management frames are mainly used for negotiation and relationship control between a station (STA) and an AP, such as association, authentication, and synchronization. c) Data frames are used to transmit data during contention periods and contention-free periods.

[0097] 3. Subtype: The subtype is used to further determine the subtype of the frame type.

[0098] 4. To DS: To DS indicates whether the frame is transmitted from a basic service set (BSS) to a distributed system (DS).

[0099] 5. From DS: From DS indicates whether the frame is transmitted from the DS to the BSS.

[0100] 6. More Fragment: More Fragment is used to describe the situation when a long frame is split, whether there are other frames or not. If there are other frames, the value of More Fragment is set to 1.

[0101] 7. Retry: Retry indicates that the fragment is a retransmission frame of a previously transmitted fragment.

[0102] 8. Power Management: Power Management indicates the power management mode used by the STA after frame transmission.

[0103] 9. More Data: More Data indicates that many frames are cached in the STA. If at least one data frame is about to be sent to the STA, the value of More Data is set to 1.

[0104] 10. Protected Frame: Protected Frame indicates that the frame body is encrypted based on the algorithm. If the frame body contains data processed with the encryption key, the value of Protected Frame is set to 1; otherwise, the value of Protected Frame is set to 0.

[0105] 11. +High Throughput Control (+HTC): +HTC is an indicator bit associated with the HT Control field.

[0106] The Duration / ID field in the MAC header is used to indicate the amount of time that the frame and its acknowledgement frame will occupy the signal, and the Duration value is used in the calculation of the network allocation vector (NAV).

[0107] The address field of the MAC header is used to indicate a destination address, a source address, a transmitting address (TA), a receiving address (RA), and a BSS identifier (BSS ID).

[0108] The Sequence Control field in the MAC header is used to filter duplicate frames.

[0109] The Quality of Service (QoS) control field in the MAC header is a new MAC layer field added to 802.11e that is used for priority control. This field is present only if the data frame is of the QoS data subtype.

[0110] The HT control field in the MAC header is a new MAC layer field added in 802.11n. After 802.11n, MAC started to support 40M bandwidth, i.e., the original two 20M bandwidths were merged into one 40M bandwidth. This field provides control for high throughput data. This field is present only when the frame is set as a high throughput frame.

[0111] The energy required for operation of a zero-power device is mainly obtained from the environment. For example, a zero-power device is supplied with energy using a radio frequency signal. Therefore, communication between a zero-power device and a network device is affected by the energy state of the zero-power device, and it is not suitable for the zero-power device to frequently receive information from the network device. However, in a communication system, a zero-power device needs to periodically receive common control information from the network device, such as a beacon frame in a Wi-Fi system. This mechanism is difficult for a zero-power device to implement. Therefore, when a zero-power device is introduced into a communication system, how to receive common control information is an urgent issue that needs to be resolved.

[0112] In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application will be described in detail below through specific embodiments. The above-mentioned related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents:

[0113] 9 is a schematic diagram illustrating a wireless communication method 200 according to an embodiment of the present application. As shown in FIG. 9, the method 200 includes at least part of the following contents: S210: The network device sends a first signal including system parameter update information to an ambient power enable (AMP) device.

[0114] In some embodiments, an AMP device may also be referred to as a zero-power device, a battery-free device, a maintenance-free device, an ambient IoT device, or an AMP IoT device.

[0115] In some embodiments, an AMP device may be a device that is defined based on the complexity of the device, the energy source, the communication method, the waveform characteristics, and the like.

[0116] In some embodiments, the AMP device may be a device that communicates based on environmental energy. For example, the AMP device obtains energy for communication using environmental energy such as radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, etc. In this case, the AMP device may be a zero-power device or a low-power device.

[0117] In some other embodiments, the energy required for the operation of the AMP device may come from the device's own power supply, in which case the AMP device may be a low power terminal.

[0118] In some embodiments, the AMP device may be a low complexity device or a device that uses novel waveforms, for example, communicating using low order modulation schemes, or simple waveforms, or signals with relatively narrow bandwidths.

[0119] In some embodiments, the AMP device may be a device that communicates using backscatter.

[0120] In some embodiments, the network device may be a network device in a cellular communication system, such as a station in an NR system, an AP in a WIFI system, or a node having a management control function in other communication systems, but this application is not limited thereto.

[0121] In some embodiments, if the network device is an AP in a WIFI system, the AMP device is also referred to as an AMP STA.

[0122] In some embodiments, in a WIFI system, the system parameters may include BSS parameter update information, and in some embodiments, the updated BSS parameters may be conveyed in a beacon frame, for example, in an element within the beacon.

[0123] In some embodiments, the first signal may be transmitted in a broadcast manner, in other words, transmitted over a broadcast channel.

[0124] In some embodiments, the system parameter update information includes first indication information and / or second indication information. The first indication information is used to identify whether an update occurs to a system parameter or whether a critical update occurs. The second indication information is used to identify the system parameter for which an update occurs or to identify location information of the system parameter for which an update occurs in the second signal. The second signal is used to convey the system parameter information.

[0125] Therefore, in an embodiment of the present application, a network device can indicate system parameter update information to an AMP device, and the AMP device can receive system parameters based on the system parameter update information. For example, if the first instruction information indicates that no update has occurred in the system parameters, the AMP device does not receive the system parameters. This is beneficial to energy conservation of the AMP device. Also, for example, the AMP device can identify system parameters that will be updated based on the second instruction information, and further, the AMP device can receive only system parameters that will be updated, or can receive only system parameters at corresponding locations based on location information of the system parameters that will be updated. This can reduce the complexity of the AMP device receiving system parameters and can also reduce the power consumption of the AMP device.

[0126] In some embodiments, the first indication information may be one bit, and the value of the one bit is used to indicate whether an update occurs in the system parameter. A value of 1 in the one bit indicates that an update occurs in the system parameter, and a value of 0 in the one bit indicates that an update does not occur in the system parameter.

[0127] In some embodiments, the network device determines the state indicated by the first indication based on whether a system parameter has been updated within a certain period of time. For example, if the system parameter at the current time point has not been updated compared to the system parameter within a previous period of time, the first indication is used to indicate that no update has occurred to the system parameter. Otherwise, the first indication is used to indicate that an update has occurred to the system parameter.

[0128] In some other embodiments, the first indication information may be used to indicate the value of the first information. A change in the value of the first information is used to determine whether an update occurs to the system parameter. For example, if the value of the first information has changed relative to the value of the first information previously received, the AMP device determines that an update occurs to the system parameter. Otherwise, the AMP device determines that no update occurs to the system parameter.

[0129] In some embodiments, when an update occurs to the system parameter (or a significant update occurs), the network device adjusts the value of the first information.

[0130] For example, the first information may be system parameter update counter information. The network device may maintain a system parameter update counter. When a change occurs in a system parameter, the network device may increment a count value of the counter. When an update occurs in the count value of the counter, the network device may transmit a first signal to notify the AMP device that an update occurs in the system parameter.

[0131] In some specific embodiments, the network device is an access point, and the system parameter update counter may be a BSS Parameter Update Counter used to indicate whether an update occurs to a BSS parameter, for example, whether an update occurs to a parameter in an element in a beacon frame used to carry the BSS parameter.

[0132] In some embodiments, the system parameters may include at least one of the following types: channel switching related system parameters, energy delivery related system parameters, and backscatter related system parameters.

[0133] In some embodiments, the system parameters related to channel switching may include at least one of a Channel Switch announcement parameter, an Extended Channel Switch announcement parameter.

[0134] In some embodiments, the system parameters related to energy delivery may include radio frequency channel parameters or radio frequency signal parameters used for energy delivery.

[0135] In some embodiments, the system parameters related to backscattering may include parameters related to the channel or signal of the carrier used for backscattering.

[0136] In some embodiments, updates that occur to system parameters may include, but are not limited to, at least one of: Inclusion of a Channel Switch announcement element; Inclusion of an Extended Channel Switch announcement element; Inclusion of an Operating Mode Notification element; Modification to RF power source parameter; Modification to carrier parameter.

[0137] In some embodiments, the second indication is used to indicate the system parameters for which updating will occur (i.e., which system parameters the updating will occur for), or to indicate the type of system parameters for which updating will occur, such as channel switching related system parameters, energy delivery related system parameters, or backscatter related system parameters.

[0138] In some specific embodiments, the second indication may be N bits, where different states of the N bits are used to indicate that an update occurs to different system parameters, and N is a positive integer. For example, the N bits may be 2 bits, where a value of 00 indicates that no update occurs to the system parameters, a value of 01 indicates that an update occurs to parameters related to channel switching, a value of 10 indicates that an update occurs to parameters related to energy supply, and a value of 11 indicates that an update occurs to parameters related to backscattering.

[0139] In some other specific embodiments, the network device may indicate whether an update occurs to each type of system parameter in the manner of bit mapping.

[0140] For example, the second indication information may be three bits corresponding to three types of system parameters, such as a system parameter related to channel switching, a system parameter related to energy supply, and a system parameter related to backscattering. The value of each bit is used to indicate whether an update occurs to the corresponding system parameter. For example, a bit value of 1 indicates that an update occurs to the corresponding system parameter, and a bit value of 0 indicates that an update does not occur to the corresponding system parameter.

[0141] In some embodiments, the first signal is a first PPDU. For example, if the network device is an AP, the AP may carry system parameter update information via the first PPDU.

[0142] In the embodiment of the present application, the first PPDU may be realized by using an existing PPDU frame. For example, a new information field may be added to the existing PPDU frame to carry the system parameter update information. Alternatively, a reserved bit in the existing PPDU frame may be used to carry the system parameter update information. Alternatively, a new PPDU frame may be defined to carry the system parameter update information used for the AMP device.

[0143] In some embodiments, the first PPDU may be a beacon frame or a NULL data PPDU (NDP), or the first PPDU may be another management frame, control frame, or data frame.

[0144] In some embodiments, the system parameter update information and the system parameter information may be carried in the same signal or may be carried in different signals.

[0145] For example, the second signal is a second PPDU, and the first PPDU and the second PPDU may be the same PPDU or may be different PPDUs.

[0146] The manner in which the system update information is carried in the first PPDU will be described below with reference to a specific embodiment.

[0147] Embodiment 1: The system parameter update information is carried in the physical layer part of the first PPDU.

[0148] In some embodiments, the data portion of the first PPDU is used to carry the system parameters, or the system parameters may be carried in another PPDU.

[0149] In the first PPDU, the physical layer portion precedes the data portion, i.e., the system parameter update information precedes the data portion. Therefore, the AMP device can obtain the system parameter update information by receiving the physical layer portion of the first PPDU and further determine whether to receive the system parameters based on the system parameter update information. For example, if the first indication information indicates that no update has occurred to the system parameters, the AMP device will not receive the system parameters. In this situation, if the system parameters are carried in the data portion of the first PPDU, the AMP device will not receive the data of the first PPDU. If the data parameters are carried in another PPDU, the AMP device will not receive the other PPDU.

[0150] In an embodiment of the present application, the network device may transmit the system parameter update information through a reserved bit in the physical layer portion of the first PPDU. Alternatively, a new information field may be added to the physical layer portion of the first PPDU to transmit the system parameter update information. This is not a limitation of the present application. A specific manner in which the system parameter update information is transmitted to the physical layer portion will be described below with reference to a specific example. However, this application is not limited to this specific manner.

[0151] Embodiment 1-1: The physical layer portion of the first PPDU includes a first preamble portion, a second preamble portion, and a system parameter update information portion. The first preamble portion is used to carry preamble information of a non-AMP device. The second preamble portion is used to carry preamble information of an AMP device. The system parameter update information portion is used to carry system parameter update information.

[0152] In some embodiments, in the physical layer portion of the first PPDU, the first preamble portion precedes the second preamble portion and the system parameter update information follows the second preamble portion.

[0153] 10 is a schematic diagram illustrating a format of a first PPDU according to an embodiment of the present application. As shown in FIG. 10, the physical layer portion of the first PPDU may include a first preamble portion, a second preamble portion, and system parameter update information. The first preamble portion corresponds to a non-AMP device (e.g., a STA), and the second preamble portion corresponds to an AMP device. The first preamble portion may be used for synchronization and channel estimation of the non-AMP device, and the second preamble portion may be used for synchronization of the AMP device.

[0154] In some embodiments, the first preamble portion may include at least one of an STF portion, an LTF portion, and a SIG portion.

[0155] In some embodiments, the second preamble portion may also include at least one of an STF portion, an LTF portion, and a SIG portion.

[0156] In some embodiments, the first preamble portion is also referred to as a conventional preamble portion, and the second preamble portion is also referred to as an AMP preamble portion. The STF portion in the conventional preamble portion is also referred to as a conventional STF (Leagcy-STF, L-STF) portion, the LTF portion in the conventional preamble portion is also referred to as a conventional LTF (Leagcy-LTF, L-LTF) portion, and the SIG portion in the conventional preamble portion is also referred to as a conventional SIG (Leagcy-SIG, L-SIG) portion. Similarly, the SIG portion in the second preamble portion is also referred to as an AMP-SIG portion. Figure 11 is a schematic diagram showing the format of a first preamble portion according to an embodiment of the present application.

[0157] In some embodiments, the first preamble portion is transmitted over a conventional 802.11 wireless air interface, and the second preamble portion and the system parameter update information are transmitted over an AMP wireless air interface, which may also be referred to as a zero-power wireless air interface and may refer to an interface used by a network device and an AMP device to communicate.

[0158] In some embodiments, the system parameter update information portion is used to indicate BSS parameter update counter information, in which case the system parameter update information portion is also referred to as a BSS parameter update counter portion.

[0159] In some embodiments, if the data portion of the first PPDU is used to carry information to be sent to the AMP device, the data portion is also referred to as the AMP data portion.

[0160] In some embodiments, the data portion of the first PPDU is used to carry system parameter information for the AMP device, or the system parameter information for the AMP device may be carried in another PPDU. In this way, the AMP device can determine whether to receive the data portion of the first PPDU or whether to receive another PPDU based on the system parameter update information in the physical layer portion of the first PPDU.

[0161] For example, if the first PPDU is a beacon frame used to carry system parameter information of an AMP device, the AMP device can determine whether the system parameters have been updated based on the physical layer portion in the beacon frame, and further determine whether to receive the system parameter information carried in the data portion of the beacon frame.

[0162] Embodiment 1-2: The physical layer portion of the first PPDU includes a second preamble portion and a system parameter update information portion, and the second preamble portion is used to carry preamble information of the AMP device.

[0163] In this case, the first PPDU is also called an AMP PPDU. For example, a PPDU dedicated to the AMP device is defined to carry system parameter update information for the AMP device.

[0164] In some embodiments, the system parameter update information portion is located between the second preamble portion and the data portion of the first PPDU.

[0165] In some embodiments, the second preamble portion may include at least one of an STF portion, an LTF portion, and a SIG portion.

[0166] 12 is a schematic diagram illustrating another format of the first PPDU according to an embodiment of the present application. As shown in FIG. 12, the physical layer portion of the first PPDU may include a second preamble portion and a system parameter update portion. The system parameter update information portion follows the second preamble portion.

[0167] In some embodiments, the first PPDU is transmitted over an AMP wireless air interface, which may also be referred to as a zero-power wireless air interface, and may refer to an interface used by a network device and an AMP device to communicate.

[0168] In some embodiments, the system parameter update information portion is used to indicate BSS parameter update counter information, in which case the system parameter update information portion is also referred to as a BSS parameter update counter portion.

[0169] In some embodiments, the second preamble portion is also referred to as the AMP preamble portion, and the data portion of the first PPDU is also referred to as the AMP data portion.

[0170] In some embodiments, the data portion of the first PPDU is used to carry system parameter information, or the system parameter information may be carried in another PPDU. In this way, the AMP device can determine whether to receive the data portion of the first PPDU or whether to receive another PPDU based on the system parameter update information in the physical layer portion of the first PPDU.

[0171] For example, if the first PPDU is a beacon frame used to carry system parameter information of the AMP device, the AMP device can determine whether the system parameters of the AMP device have been updated based on the physical layer portion of the beacon frame, and further determine whether to receive the system parameter information carried in the data portion of the beacon frame.

[0172] Embodiment 1-3: The physical layer portion of the first PPDU includes a first preamble portion and a second preamble portion. The first preamble portion is used to carry preamble information of a non-AMP device. The second preamble portion is used to carry preamble information of an AMP device. The second preamble portion is further used to indicate system parameter update information. For example, the second preamble portion can explicitly or implicitly indicate the system parameter update information.

[0173] In this embodiment 1-3, for the specific implementation of the first preamble part, reference can be made to the relevant description in embodiment 1-1, which will not be repeated in this specification for the sake of brevity.

[0174] In some embodiments, the second preamble portion may include at least one of an STF portion, an LTF portion, and a SIG portion.

[0175] In some embodiments, the system parameter update information is carried in the second preamble portion.

[0176] For example, the second preamble portion includes a SIG (denoted as AMP-SIG) portion, and system parameter update information is carried in the AMP-SIG portion.

[0177] In some other embodiments, the second preamble portion is used to implicitly indicate system parameter update information.

[0178] For example, the second preamble portion is represented by a sequence, and different sequences are used to indicate different system parameter update information.

[0179] For example, multiple sequences may be defined to indicate different system parameter update information. The multiple sequences may have equal or unequal lengths. For example, if the system parameter update information is 1-bit information, two sequences may be used to indicate whether the system parameters have been updated.

[0180] 13 is a schematic diagram illustrating another format of the first PPDU according to an embodiment of the present application. As shown in FIG. 13, the physical layer portion of the first PPDU may include a first preamble portion and a second preamble portion. The second preamble portion includes a system parameter update information portion or is used to indicate system parameter update information.

[0181] Embodiment 1-4: The physical layer portion of the first PPDU includes a second preamble portion, which is used to carry preamble information of an AMP device, and which is further used to indicate system parameter update information.

[0182] In this embodiment 1-4, for the specific implementation of the second preamble portion, reference can be made to the relevant description of the second preamble portion in FIG. 1-3, which will not be repeated herein for the sake of brevity.

[0183] In the first to fourth embodiments, the first PPDU is also called an AMP PPDU. For example, a PPDU dedicated to the AMP device is defined to indicate the system parameter update information of the AMP device.

[0184] 14 is a schematic diagram illustrating another format of the first PPDU according to an embodiment of the present application. As shown in FIG. 14, the physical layer portion of the first PPDU may include a second preamble portion. The second preamble portion includes a system parameter update information portion, or the second preamble portion is used to indicate the system parameter update information.

[0185] Note that in the examples of Figures 10 to 14, the first PPDU includes a data portion. In some other embodiments, the first PPDU may not include a data portion, for example, the first PPDU is an NDP frame. Figures 15 to 18 are schematic diagrams showing frame formats that carry system parameter update information in an NDP frame. For the meaning of each part in Figures 15 to 18, reference may be made to the meaning of the corresponding part in Figures 10 to 14, and the meaning will not be repeated here for the sake of brevity.

[0186] Embodiment 2: The system parameter update information is carried in the data portion of the first PPDU.

[0187] In some embodiments, the AMP device can receive the system parameters based on the system parameter update information in the first PPDU, which is more power-efficient than receiving the system parameters.

[0188] In some embodiments, the first PPDU may be a frame that must be received during communication between the AMP device and the AP. For example, this may be a broadcast PPDU frame or a unicast PPDU frame, specifically, a NDP frame, a data frame, or a management frame. Thus, when the AMP device must receive these frames, the network device can carry system parameter update information through the data portion of these frames. For example, the system parameter update information may be carried as an element or field in the frame body portion of the frame, or may be carried as an element or field in the MAC header portion. Figure 19 is a schematic diagram illustrating a format in which the system parameter update information is carried through the MAC header in the first PPDU. Figure 20 is a schematic diagram illustrating a format in which the system parameter update information is carried through the MAC frame body in the first PPDU.

[0189] In some embodiments, the system parameter update information is carried in a specific position in the data portion of the first PPDU. In this way, the AMP device does not need to acquire all the information in the data portion, but can acquire the system parameter update information by acquiring the information in the specific position, which is beneficial to power saving of the AMP device.

[0190] For example, the system parameter update information may be carried in the first N elements or fields of the data portion of the first PPDU, where N is a positive integer. In this case, the AMP device can acquire the system parameter update information by receiving the information in the first N elements or fields of the data portion of the first PPDU, and further receive the system parameters based on the system parameter update information. For example, if the first indication information indicates that no update has occurred to the system parameters, the AMP device does not receive the system parameters. This is beneficial to energy conservation of the AMP device. Also, for example, the AMP device may identify system parameters that will be updated based on the second indication information, and further receive only the system parameters that will be updated, or may receive only system parameters at the corresponding locations based on the location information of the system parameters that will be updated. This reduces the complexity of the AMP device receiving the system parameters and also reduces the power consumption of the AMP device.

[0191] In some embodiments of the present application, the method 200 further includes the network device transmitting a second signal to the AMP device that is used to convey system parameter information.

[0192] In response, the AMP device receives a second signal based on the system parameter update information.

[0193] In some embodiments, the second signal and the first signal are the same signal.

[0194] For example, the first signal is a first PPDU, the second signal is a second PPDU, the first PPDU and the second PPDU are the same PPDU, the system parameter update information is carried in the physical layer part of the PPDU, and the system parameter information is carried in the data part of the PPDU. In this case, if the AMP device determines that no update has occurred in the system parameter by receiving the physical layer part of the first PPDU, it can not receive the data part of the first PPDU, which is beneficial to power saving of the AMP device.

[0195] In some embodiments, the second signal and the first signal are different signals.

[0196] For example, the first signal is a first PPDU, the second signal is a second PPDU, the first PPDU and the second PPDU are different PPDUs, the system parameter update information is carried in the physical layer part or data part of the first PPDU, and the system parameter information is carried in the data part of the second PPDU. In this case, if the AMP device determines that no update has occurred to the system parameters by receiving the physical layer part of the first PPDU, it can not receive the second PPDU, which is beneficial to power saving of the AMP device.

[0197] In some embodiments, the system parameter information is carried in the first M elements or fields of the data portion of the second signal, where M is a positive integer. For example, the system parameter information is carried in the first M elements or fields of the data portion of the second PPDU. Therefore, the AMP device does not need to receive the entire data portion of the second signal, and can obtain the system parameter information by receiving the information in the first M elements or fields of the data portion of the second PPDU. This is beneficial to power saving of the AMP device.

[0198] In some embodiments, the system parameter information includes only updated configurations of system parameters for which updates occur, i.e., only updated configurations of system parameters for which updates occur are carried in the second signal.

[0199] For example, if the system parameter update information indicates that an update will occur to a system parameter, the second signal includes only the updated configuration of the system parameter for which the update will occur. Therefore, the AMP device does not need to receive the configuration of all system parameters, but only the configuration of the system parameter for which the update will occur, which is beneficial to power saving of the AMP device.

[0200] In some embodiments, the system parameter information includes the configuration of all system parameters, i.e., the configuration of all system parameters is carried in the second signal.

[0201] Optionally, in this case, the system parameter update information may include second indication information, which is used to indicate the system parameter for which the update occurs, or is used to indicate the location information of the system parameter for which the update occurs.

[0202] In some cases, the location of the system parameter is fixed in the data portion of the second signal. The AMP device's understanding of the location is consistent with the network device's understanding of the location. In this way, when the second indication information indicates the system parameter where an update occurs, the AMP device can receive only the information at the location where the system parameter where the update occurs is located. This is beneficial to power saving of the AMP device.

[0203] In some other cases, the location of the system parameter is variable in the data portion of the second signal. In this way, if the second indication information indicates the location information of the system parameter where the update occurs, the AMP device can receive only the information at that location, which is beneficial to power saving of the AMP device.

[0204] In some embodiments, if the second PPDU includes the configuration of all system parameters, the configuration of those system parameters for which an update occurs among all system parameters is carried in the first M elements or first M fields of the data portion of the second PPDU, where M is a positive integer.

[0205] Therefore, when the AMP device receives the information of the first M elements or the first M fields of the data part of the second PPDU, it can obtain the system parameter information that will be updated, which is beneficial to power saving of the AMP device.

[0206] In some embodiments, some second signals transmitted by the network device include only system parameter information for which an update occurs, and other second signals include all system parameter information. The AMP device can determine which type of second signal to receive based on the system parameter update information. For example, if an update occurs to a system parameter, the AMP device receives a second signal that carries only system parameter information for which an update occurs. If not, the AMP device does not receive the second signal. An AMP device newly accessing the system must first receive a second signal that carries complete system parameter information.

[0207] In summary, in an embodiment of the present application, a network device can indicate system parameter update information to an AMP device, and the AMP device can receive system parameters based on the system parameter update information. For example, if the first indication information indicates that no update has occurred in the system parameters, the AMP device does not receive the system parameters. This is beneficial to energy conservation of the AMP device. Also, for example, the AMP device can identify system parameters that will be updated based on the second indication information, and further, the AMP device can receive only system parameters that will be updated, or can receive only system parameters at corresponding locations based on location information of the system parameters that will be updated. This can reduce the complexity of the AMP device receiving system parameters and can also reduce the power consumption of the AMP device.

[0208] The method embodiments of the present application have been described in detail above with reference to Figures 9 to 20. Hereinafter, the apparatus embodiments of the present application will be described in detail with reference to Figures 21 to 25. It should be noted that the apparatus embodiments correspond to the method embodiments, and for similar descriptions, reference can be made to the method embodiments.

[0209] 21 is a block diagram illustrating a network device 400 according to an embodiment of the present application. As shown in FIG. 21, the network device 400 includes a communication unit 410. The communication unit 410 is configured to send a first signal including system parameter update information to an ambient power enabled (AMP) device.

[0210] In some embodiments, the system parameter update information includes first indication information and / or second indication information, where the first indication information is used to identify whether an update occurs to a system parameter, and the second indication information is used to identify the system parameter to which the update occurs or to identify location information of the updated system parameter in the second signal, and the second signal is used to convey the system parameter information.

[0211] In some embodiments, the network device is an access point.

[0212] In some embodiments, the system parameter update information includes basic service set (BSS) parameter update information.

[0213] In some embodiments, the BSS parameter update information includes a count value of a BSS parameter update counter.

[0214] In some embodiments, the first signal is a first physical layer protocol data unit (PPDU).

[0215] In some embodiments, the system parameter update information is carried in the physical layer portion of the first PPDU.

[0216] In some embodiments, the physical layer portion of the first PPDU includes a first preamble portion, a second preamble portion, and system parameter update information, wherein the first preamble portion is used to carry preamble information for non-AMP devices and the second preamble portion is used to carry preamble information for AMP devices.

[0217] In some embodiments, the physical layer portion of the first PPDU includes a second preamble portion and system parameter update information, and the second preamble portion is used to carry preamble information of the AMP device.

[0218] In some embodiments, the system parameter update information is located between the second preamble portion and the data portion of the PPDU.

[0219] In some embodiments, the physical layer portion of the first PPDU includes a first preamble portion and a second preamble portion, the first preamble portion being used to carry preamble information for non-AMP devices, the second preamble portion being used to carry preamble information for AMP devices, and the second preamble portion being further used to indicate system parameter update information.

[0220] In some embodiments, the physical layer portion of the first PPDU includes a second preamble portion, the second preamble portion is used to carry preamble information of the AMP device, and the second preamble portion is further used to indicate system parameter update information.

[0221] In some embodiments, the second preamble portion is represented by a sequence, with different sequences being used to indicate different system parameter update information.

[0222] In some embodiments, the system parameter update information is carried in the second preamble portion.

[0223] In some embodiments, the second preamble portion comprises a signal portion, and the system parameter update information is carried in the signal portion.

[0224] In some embodiments, the first PPDU further includes a data portion.

[0225] In some embodiments, the first PPDU is a beacon frame.

[0226] In some embodiments, the first PPDU is a null data PPDU (NDP).

[0227] In some embodiments, the system parameter update information is carried in the data portion of the first PPDU.

[0228] In some embodiments, the system parameter update information is carried in a specific location in the data portion of the first PPDU.

[0229] In some embodiments, the system parameter update information is carried in the first N elements or fields of the data portion of the first PPDU, where N is a positive integer.

[0230] In some embodiments, the communication unit 410 is further configured to transmit a second signal used to convey system parameter information to the AMP device.

[0231] In some embodiments, the system parameter information includes only the updated configurations of the system parameters for which updates occur, or includes the configurations of all system parameters.

[0232] In some embodiments, the second signal is a second PPDU and the system parameter information is carried in a data portion of the second PPDU.

[0233] In some embodiments, the data portion of the second PPDU includes the configuration of all system parameters, and the configuration of the system parameters for which an update occurs is carried in the first M elements or first M fields of the data portion of the second PPDU, where M is a positive integer.

[0234] Optionally, in some embodiments, the communication unit may be a communication interface or transceiver, or an input / output interface of a communication chip or a system-on-chip. The processing unit may be one or more processors.

[0235] It should be noted that the network device 400 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application. In addition, the above and other operations and / or functions of each unit in the network device 400 are for implementing the corresponding processes of the network device in the method illustrated in Figures 9 to 20. For the sake of brevity, they will not be repeated here.

[0236] 22 is a block diagram illustrating an ambient power enabled (AMP) device 500 according to an embodiment of the present application. As shown in FIG. 22, the network device 500 includes a communication unit 510. The communication unit 510 is configured to receive a first signal transmitted by the network device, where the first signal includes system parameter update information.

[0237] In some embodiments, the system parameter update information includes first indication information and / or second indication information, where the first indication information is used to identify whether an update occurs to a system parameter, and the second indication information is used to identify the system parameter for which the update occurs or to identify location information in the second signal of the system parameter for which the update occurs, and the second signal is used to convey the system parameter information.

[0238] In some embodiments, the network device is an access point.

[0239] In some embodiments, the system parameter update information includes basic service set (BSS) parameter update information.

[0240] In some embodiments, the BSS parameter update information includes a count value of a BSS parameter update counter.

[0241] In some embodiments, the first signal is a first physical layer protocol data unit (PPDU).

[0242] In some embodiments, the system parameter update information is carried in the physical layer portion of the first PPDU.

[0243] In some embodiments, the physical layer portion of the first PPDU includes a first preamble portion, a second preamble portion, and system parameter update information, wherein the first preamble portion is used to carry preamble information for non-AMP devices and the second preamble portion is used to carry preamble information for AMP devices.

[0244] In some embodiments, the physical layer portion of the first PPDU includes a second preamble portion and system parameter update information, and the second preamble portion is used to carry preamble information of the AMP device.

[0245] In some embodiments, the system parameter update information is located between the second preamble portion and the data portion of the PPDU.

[0246] In some embodiments, the physical layer portion of the first PPDU includes a first preamble portion and a second preamble portion, the first preamble portion being used to carry preamble information for non-AMP devices, the second preamble portion being used to carry preamble information for AMP devices, and the second preamble portion being further used to indicate system parameter update information.

[0247] In some embodiments, the physical layer portion of the first PPDU includes a second preamble portion, the second preamble portion is used to carry preamble information of the AMP device, and the second preamble portion is further used to indicate system parameter update information.

[0248] In some embodiments, the second preamble portion is represented by a sequence, with different sequences being used to indicate different system parameter update information.

[0249] In some embodiments, the system parameter update information is carried in the second preamble portion.

[0250] In some embodiments, the second preamble portion comprises a signal portion, and the system parameter update information is carried in the signal portion.

[0251] In some embodiments, the first PPDU further includes a data portion.

[0252] In some embodiments, the first PPDU is a beacon frame.

[0253] In some embodiments, the first PPDU is a null data PPDU (NDP).

[0254] In some embodiments, the system parameter update information is carried in the data portion of the first PPDU.

[0255] In some embodiments, the system parameter update information is carried in a specific location in the data portion of the first PPDU.

[0256] In some embodiments, the system parameter update information is carried in the first N elements or fields of the data portion of the first PPDU, where N is a positive integer.

[0257] In some embodiments, the communication unit 510 is further configured to receive a second signal transmitted by the network device when an update occurs to the system parameter, or to obtain updated system parameter information from the data portion of the first signal, the second signal being used to carry the system parameter information.

[0258] In some embodiments, the system parameter information includes only the updated configurations of the system parameters for which updates occur, or includes the configurations of all system parameters.

[0259] In some embodiments, the second signal is a second PPDU and the system parameter information is carried in a data portion of the second PPDU.

[0260] In some embodiments, the data portion of the second PPDU includes the configuration of all system parameters, and the configuration of the system parameters for which an update occurs is carried in the first M elements or first M fields of the data portion of the second PPDU, where M is a positive integer.

[0261] Optionally, in some embodiments, the communication unit may be a communication interface or transceiver, or an input / output interface of a communication chip or a system-on-chip. The processing unit may be one or more processors.

[0262] It should be noted that the AMP device 500 according to the embodiment of the present application may correspond to the AMP device in the method embodiment of the present application. Also, the above and other operations and / or functions of each unit in the AMP device 500 are for implementing the corresponding processes of the AMP device in the method shown in Figures 9 to 20. For the sake of brevity, they will not be repeated here.

[0263] Fig. 23 is a diagram showing the structure of a communication device 600 according to an embodiment of the present application. The communication device 600 shown in Fig. 23 includes a processor 610. The processor 610 can implement the method according to the embodiment of the present application by calling and executing a computer program stored in a memory.

[0264] Optionally, as shown in Figure 23, the communication device 600 may further include a memory 620. The processor 610 may call and execute a computer program stored in the memory 620 to implement the method in the embodiment of the present application.

[0265] The memory 620 may be separate and distinct from the processor 610 or may be integrated into the processor 610 .

[0266] 23, the communication device 600 may further include a transceiver 630. The processor 610 may control the transceiver 630 to communicate with other devices. Specifically, the transceiver 630 may transmit information or data to other devices or receive information or data transmitted by other devices.

[0267] The transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include an antenna. The number of antennas may be one or more.

[0268] Alternatively, the communication device 600 may specifically be a network device in the embodiments of the present application, and may implement the corresponding processes implemented by the network device in each method in the embodiments of the present application, which will not be repeated here for the sake of brevity.

[0269] Alternatively, the communication device 600 may specifically be the AMP device of the embodiment of the present application, and may implement the corresponding processes implemented by the AMP device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0270] Fig. 24 is a schematic diagram showing the structure of a chip according to an embodiment of the present application. The chip 700 shown in Fig. 24 includes a processor 710. The processor 710 can implement the method according to the embodiment of the present application by calling and executing a computer program stored in a memory.

[0271] Optionally, as shown in Figure 24, the chip 700 may further include a memory 720. The processor 710 may call and execute a computer program stored in the memory 720 to implement the method in the embodiment of the present application.

[0272] The memory 720 may be separate and distinct from the processor 710 or may be integrated into the processor 710 .

[0273] Optionally, the chip 700 may further include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips. Specifically, the input interface 730 may receive information or data transmitted by other devices or chips.

[0274] Optionally, the chip 700 further includes an output interface 740. The processor 710 can control the output interface 740 to communicate with other devices or chips. Specifically, the output interface 740 can output information or data to other devices or chips.

[0275] Optionally, the chip can be applied to the network device of the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0276] Alternatively, the chip can be applied to the AMP device of the embodiment of the present application, and can implement the corresponding processes implemented by the AMP device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0277] It should be understood that a chip according to embodiments of the present application may also be referred to as a system level chip, a system chip, a chip system, or a system-on-chip (SOC).

[0278] 25 is a block diagram showing a communication system 900 according to an embodiment of the present application. As shown in FIG. 25, the communication system 900 includes an AMP device 910 and a network device 920.

[0279] The terminal device 910 may be configured to implement the corresponding functions implemented by the terminal device in the above method, and the network device 920 may be configured to implement the corresponding functions implemented by the network device in the above method, which will not be repeated here for the sake of brevity.

[0280] It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiments may be completed by an integrated logic circuit in the form of hardware of the processor or instructions in the form of software. The 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. The processor may implement or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of the present application may be performed and completed directly by a hardware decoding processor, or may be performed and completed by a combination of hardware and software modules in the decoding processor. The software module can be stored in a storage medium well known in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, a register, etc. The storage medium is stored in the memory. The processor reads the information in the memory and completes the steps of the above method in cooperation with the processor hardware.

[0281] As can be appreciated, the memory of the embodiments of the present application can be volatile or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM) that functions as an external high-speed cache. By way of illustrative, but non-limiting example, various RAMs are available, including static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM). It should be noted that the memory in the systems and methods described herein may include, but is not limited to, these and any other suitable types of memory.

[0282] It should be understood that the above memories are exemplary and not limiting. For example, the memories of the embodiments of the present application may be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous-link dynamic random access memory (synch-link DRAM, SLDRAM), direct rambus random access memory (DRRAM), etc. That is, the memories of the embodiments of the present application may include, but are not limited to, these and any other suitable types of memory.

[0283] An embodiment of the present application further provides a computer-readable storage medium used to store a computer program.

[0284] Optionally, the computer-readable storage medium can be applied to the network device of the embodiment of the present application, and the computer program causes a computer to execute corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0285] Optionally, the computer-readable storage medium can be applied to the AMP device of the embodiment of the present application, and the computer program causes a computer to execute the corresponding processes implemented by the AMP device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0286] Embodiments of the present application further provide a computer program product including computer program instructions.

[0287] Alternatively, the computer program product can be applied to the network device of the embodiments of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the network device in each method of the embodiments of the present application, which will not be repeated here for the sake of brevity.

[0288] Alternatively, the computer program product can be applied to the AMP device of the embodiments of the present application, and the computer program instructions cause a computer to execute corresponding processes implemented by the AMP device in each method of the embodiments of the present application, which will not be repeated here for the sake of brevity.

[0289] An embodiment of the present application further provides a computer program.

[0290] Alternatively, the computer program can be applied to the network device of the embodiment of the present application, and when the computer program is executed by a computer, the computer executes the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0291] Alternatively, the computer program can be applied to the AMP device of the embodiment of the present application, and when the computer program is executed by a computer, the computer executes the corresponding processes implemented by the AMP device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0292] It is clear to those skilled in the art that the present application can be realized by electronic hardware or a combination of computer software and electronic hardware in conjunction with each exemplary unit and algorithm operation described in the embodiments disclosed herein. Whether these functions are performed by hardware or software depends on the specific application of the technical solution and the design constraints. Those skilled in the art can realize the described functions using different methods for each specific application, but these realizations should not be considered beyond the scope of the present application.

[0293] Those skilled in the art can understand that for ease and conciseness of description, the specific operation procedures of the above systems, devices and units can be referred to the corresponding processes of the above method embodiments, and will not be repeated here.

[0294] It should be understood that in some embodiments of the present application, the disclosed systems, devices, and methods may be realized in other forms. For example, the above-described device embodiments are merely illustrative. For example, the division of units represents merely a division of logical functions, and actual implementations may have other division forms. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented. Furthermore, the couplings, direct couplings, and communication connections shown or discussed may be indirect couplings or communication connections through several interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0295] Units described as separate components may or may not be physically separated. Components shown as units may or may not be physical units, i.e., they may be located in one place or may be distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the technical solution of this embodiment.

[0296] Furthermore, each functional unit according to each embodiment of the present application may be integrated into one processing unit, each unit may exist physically alone, or two or more units may be integrated into one unit.

[0297] The functions may be implemented as software functional units and stored in a computer-readable storage medium when sold or used as an independent product. According to this understanding, an essential part of the technical solution of the present application, a part that contributes to the prior art, or a part of the technical solution may be expressed as a software product. This computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The storage medium includes various types of media capable of storing program code, such as a universal serial bus (USB) flash disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0298] The above is only a specific embodiment of the present application, and the scope of protection of the present application is not limited thereto. Any modifications or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be determined by the scope of protection of the claims.

Claims

1. 1. A wireless communication method, comprising: a network device transmitting a first signal including system parameter update information to an ambient power enable (AMP) device; A wireless communication method comprising:

2. the system parameter update information includes first indication information and / or second indication information, the first indication information being used to identify whether an update occurs to a system parameter, the second indication information being used to identify a system parameter to be updated or to identify location information of the updated system parameter in a second signal, and the second signal being used to convey system parameter information; 2. The method of claim 1 .

3. the network device is an access point; 3. The method according to claim 1 or 2.

4. the system parameter update information includes basic service set (BSS) parameter update information; 4. The method according to claim 1, wherein the first and second electrodes are connected to a first electrode.

5. The BSS parameter update information includes a count value of a BSS parameter update counter.

5. The method of claim 4.

6. the first signal is a first physical layer protocol data unit (PPDU); 6. The method according to any one of claims 1 to 5.

7. the system parameter update information is carried in a physical layer portion of the first PPDU.

7. The method of claim 6.

8. the physical layer portion of the first PPDU includes a first preamble portion, a second preamble portion, and the system parameter update information, the first preamble portion being used to carry preamble information for non-AMP devices, and the second preamble portion being used to carry preamble information for AMP devices; 8. The method of claim 7.

9. the physical layer portion of the first PPDU includes a second preamble portion and the system parameter update information, and the second preamble portion is used to carry preamble information of an AMP device; 8. The method of claim 7.

10. the system parameter update information is located between the second preamble portion and the data portion of the PPDU.

10. The method according to claim 8 or 9.

11. the physical layer portion of the first PPDU includes a first preamble portion and a second preamble portion, the first preamble portion is used to carry preamble information for non-AMP devices, the second preamble portion is used to carry preamble information for AMP devices, and the second preamble portion is further used to indicate system parameter update information; 8. The method of claim 7.

12. the physical layer portion of the first PPDU includes a second preamble portion, the second preamble portion is used to carry preamble information of an AMP device, and the second preamble portion is further used to indicate system parameter update information; 8. The method of claim 7.

13. the second preamble portion is represented by a sequence, and different sequences are used to indicate different system parameter update information.

13. The method according to claim 11 or 12.

14. the system parameter update information is carried in the second preamble portion.

13. The method according to claim 11 or 12.

15. the second preamble portion includes a signal portion, and the system parameter update information is carried in the signal portion.

15. The method of claim 14.

16. the first PPDU further includes a data portion.

16. The method according to any one of claims 6 to 15.

17. the first PPDU is a beacon frame; 17. The method of claim 16.

18. the first PPDU is a Null Data PPDU (NDP); 16. The method according to any one of claims 6 to 15.

19. the system parameter update information is carried in a data portion of the first PPDU.

7. The method according to any one of claims 1 to 6.

20. the system parameter update information is carried in a specific location in the data portion of the first PPDU; 20. The method of claim 19.

21. the system parameter update information is carried in the first N elements or fields of the data portion of the first PPDU, where N is a positive integer.

21. The method of claim 20.

22. The method further comprises: the network device transmitting a second signal to the AMP device, the second signal being used to convey system parameter information; 22. The method according to any one of claims 1 to 21.

23. The system parameter information includes only updated configurations of system parameters for which updates occur, or includes configurations of all system parameters.

23. The method of claim 22.

24. the second signal is a second PPDU, and the system parameter information is carried in a data portion of the second PPDU.

24. The method of claim 22 or 23.

25. the data portion of the second PPDU includes configurations of all system parameters, and the configurations of the system parameters for which updating occurs are carried in the first M elements or fields of the data portion of the second PPDU, where M is a positive integer.

25. The method of claim 24.

26. 1. A wireless communication method, comprising: an ambient power enabled (AMP) device receiving a first signal transmitted by a network device; the first signal includes system parameter update information; A wireless communication method comprising:

27. the system parameter update information includes first indication information and / or second indication information, the first indication information being used to identify whether an update occurs to a system parameter, the second indication information being used to identify the system parameter for which an update occurs or to identify location information in a second signal of the system parameter for which an update occurs, and the second signal being used to convey system parameter information; 27. The method of claim 26.

28. the network device is an access point; 28. The method of claim 26 or 27.

29. the system parameter update information includes basic service set (BSS) parameter update information; 29. The method according to any one of claims 26 to 28.

30. The BSS parameter update information includes a count value of a BSS parameter update counter.

30. The method of claim 29.

31. the first signal is a first physical layer protocol data unit (PPDU); 31. The method according to any one of claims 26 to 30.

32. the system parameter update information is carried in a physical layer portion of the first PPDU.

32. The method of claim 31 .

33. the physical layer portion of the first PPDU includes a first preamble portion, a second preamble portion, and the system parameter update information, the first preamble portion being used to carry preamble information for non-AMP devices, and the second preamble portion being used to carry preamble information for AMP devices; 33. The method of claim 32.

34. the physical layer portion of the first PPDU includes a second preamble portion and the system parameter update information, and the second preamble portion is used to carry preamble information of an AMP device; 33. The method of claim 32.

35. the system parameter update information is located between the second preamble portion and the data portion of the PPDU.

35. The method of claim 33 or 34.

36. the physical layer portion of the first PPDU includes a first preamble portion and a second preamble portion, the first preamble portion is used to carry preamble information for non-AMP devices, the second preamble portion is used to carry preamble information for AMP devices, and the second preamble portion is further used to indicate system parameter update information; 33. The method of claim 32.

37. the physical layer portion of the first PPDU includes a second preamble portion, the second preamble portion is used to carry preamble information of an AMP device, and the second preamble portion is further used to indicate system parameter update information; 33. The method of claim 32.

38. the second preamble portion is represented by a sequence, and different sequences are used to indicate different system parameter update information.

38. The method of claim 36 or 37.

39. the system parameter update information is carried in the second preamble portion.

38. The method of claim 36 or 37.

40. the second preamble portion includes a signal portion, and the system parameter update information is carried in the signal portion.

40. The method of claim 39.

41. the first PPDU further includes a data portion.

41. The method according to any one of claims 31 to 40.

42. the first PPDU is a beacon frame; 42. The method of claim 41 .

43. the first PPDU is a Null Data PPDU (NDP); 41. The method according to any one of claims 31 to 40.

44. the system parameter update information is carried in a data portion of the first PPDU.

32. The method according to any one of claims 26 to 31.

45. the system parameter update information is carried in a specific location in the data portion of the first PPDU; 45. The method of claim 44.

46. the system parameter update information is carried in the first N elements or fields of the data portion of the first PPDU, where N is a positive integer.

46. ​​The method of claim 45.

47. The method further comprises: receiving a second signal transmitted by the network device or obtaining updated system parameter information from a data portion of the first signal when an update to the system parameter occurs; the second signal is used to carry system parameter information; 47. The method according to any one of claims 32 to 46.

48. The system parameter information includes only updated configurations of system parameters for which updates occur, or includes configurations of all system parameters.

48. The method of claim 47.

49. the second signal is a second PPDU, and the system parameter information is carried in a data portion of the second PPDU.

49. The method of claim 47 or 48.

50. the data portion of the second PPDU includes configurations of all system parameters, and the configurations of the system parameters for which updating occurs are carried in the first M elements or fields of the data portion of the second PPDU, where M is a positive integer.

50. The method of claim 49.

51. A network device comprising a communication unit, the communication unit is configured to transmit a first signal including system parameter update information to an ambient power enable (AMP) device; A network device comprising:

52. An ambient power enabled (AMP) device comprising a communication unit, the communication unit is configured to receive a first signal transmitted by a network device, the first signal including system parameter update information; An ambient power enable (AMP) device comprising:

53. A network device comprising a processor and a memory, The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory to perform the method of any one of claims 1 to 25. A network device comprising:

54. 1. An ambient power enabled (AMP) device comprising a processor and a memory, The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory to perform the method of any one of claims 26 to 50. An ambient power enable (AMP) device comprising:

55. A chip comprising a processor, The processor is configured to call and execute a computer program stored in the memory to cause the device equipped with the chip to execute the method according to any one of claims 1 to 25 or the method according to any one of claims 26 to 50. A chip characterized by:

56. 1. A computer-readable storage medium, comprising: The computer-readable storage medium is configured to store a computer program, the computer program causing a computer to perform the method according to any one of claims 1 to 25 or the method according to any one of claims 26 to 50. A computer-readable storage medium comprising:

57. 1. A computer program product comprising computer program instructions, The computer program instructions cause a computer to perform the method of any one of claims 1 to 25 or the method of any one of claims 26 to 50.

1. A computer program product comprising:

58. A computer program comprising: The computer program causes a computer to carry out the method according to any one of claims 1 to 25 or the method according to any one of claims 26 to 50. A computer program characterized by:

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