Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first device receives a first PPDU, wherein the first PPDU comprises an excitation field, and the excitation field is used for supplying power to the first device or is used by the first device to perform backscatter communication.

Description

Wireless communication methods and communication devices Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a wireless communication method and a communication device. Background Technology

[0002] In wireless communication networks (such as Wi-Fi networks), the signal (SIG) field in the physical protocol data unit (PPDU) can be used to indicate uplink (UL) transmission configuration parameters, such as PPDU length and modulation and coding scheme (MCS) indication. However, in some devices (such as AMP devices), the SIG field may be removed when transmitting UL PPDUs, causing the receiving device (such as an access point) to be unable to recognize the configuration parameters of the UL PPDU.

[0003] Therefore, how to transmit UL PPDUs is a technical problem that needs to be solved. Summary of the Invention

[0004] This application provides a wireless communication method and a communication device. The various aspects covered by this application are described below.

[0005] In a first aspect, a wireless communication method is provided, comprising: a first device receiving a first PPDU, the first PPDU including an excitation field, the excitation field being used to power the first device or for the first device to perform backscatter communication.

[0006] In a second aspect, a wireless communication method is provided, comprising: a second device sending at least a portion of fields of a first PPDU to a first device, the first PPDU including an excitation field, the excitation field being used to power the first device or for the first device to perform backscatter communication.

[0007] Thirdly, a wireless communication method is provided, comprising: a third device sending an excitation field from a first PPDU to a first device, the excitation field being used to power the first device or for the first device to perform backscatter communication.

[0008] Fourthly, a wireless communication method is provided, comprising: a first device sending an uplink PPDU to a second device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: the uplink transmission parameters are carried in the uplink PPDU; the uplink transmission parameters are determined based on configuration information of the second device; and the first device sending the uplink PPDU based on fixed uplink transmission parameters configured by the second device.

[0009] Fifthly, a wireless communication method is provided, comprising: a second device receiving an uplink PPDU sent by a first device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: the uplink transmission parameters are carried in the uplink PPDU; the uplink transmission parameters are determined based on configuration information of the second device; and the second device receiving the uplink PPDU based on fixed uplink transmission parameters configured by the second device.

[0010] In a sixth aspect, a communication device is provided, the communication device being a first device, the communication device comprising: a first receiving module for receiving a first PPDU, the first PPDU including an excitation field, the excitation field being used to power the first device or for the first device to perform backscatter communication.

[0011] In a seventh aspect, a communication device is provided, the communication device being a second device, the communication device comprising: a first transmitting module, configured to transmit at least a portion of fields in a first PPDU to a first device, the first PPDU including an excitation field, the excitation field being used to power the first device or for the first device to perform backscatter communication.

[0012] Eighthly, a communication device is provided, the communication device being a third device, the communication device comprising: a second transmitting module, configured to transmit an excitation field in a first PPDU to a first device, the excitation field being used to power the first device or for the first device to perform backscatter communication.

[0013] Ninthly, a communication device is provided, the communication device being a first device, the communication device comprising: a third transmitting module, configured to transmit an uplink PPDU to a second device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: the uplink transmission parameters are carried in the uplink PPDU; the uplink transmission parameters are determined based on configuration information of the second device; the first device transmits the uplink PPDU based on fixed uplink transmission parameters configured by the second device.

[0014] In a tenth aspect, a communication device is provided, the communication device being a second device, the communication device comprising: a third receiving module, configured to receive an uplink PPDU sent by a first device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: the uplink transmission parameters are carried in the uplink PPDU; the uplink transmission parameters are determined based on configuration information of the second device; and the second device receives the uplink PPDU based on fixed uplink transmission parameters configured by the second device.

[0015] Eleventhly, a communication device is provided, the communication device including a memory and a processor, the memory being used to store a program, and the processor being used to execute the program stored in the memory to perform the methods described in the above aspects.

[0016] In a twelfth aspect, embodiments of this application provide a communication system that includes the aforementioned communication device. In another possible design, the system may further include other devices that interact with the communication device as described in the embodiments of this application.

[0017] In a thirteenth aspect, embodiments of this application provide a computer-readable storage medium storing a computer program that causes a communication device to perform some or all of the steps in the methods described above.

[0018] In a fourteenth aspect, embodiments of this application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program operable to cause a communication device to perform some or all of the steps of the methods described in the foregoing aspects. In some implementations, the computer program product may be a software installation package.

[0019] In a fifteenth aspect, embodiments of this application provide a chip including a memory and a processor, the processor being able to call and run a computer program from the memory to implement some or all of the steps described in the methods of the foregoing aspects.

[0020] This application embodiment utilizes the excitation field in the PPDU to power the first device or to enable the first device to perform backscatter communication, thereby enabling the first device to transmit uplink PPDUs. Attached Figure Description

[0021] Figure 1 is an example diagram of a wireless communication system to which embodiments of this application can be applied.

[0022] Figure 2 is a structural example diagram of an AMP device.

[0023] Figure 3 is a structural example of the energy harvesting module in Figure 2.

[0024] Figure 4 is an example diagram of the backscatter communication process of an AMP device.

[0025] Figure 5 shows an example of the encoding method for AMP devices.

[0026] Figure 6 is a flowchart illustrating the wireless communication method provided in an embodiment of this application.

[0027] Figure 7 is an example diagram of the PPDU format provided in the embodiments of this application.

[0028] Figure 8 is an example diagram of another format of PPDU provided in the embodiments of this application.

[0029] Figure 9 is another example of the format of PPDU provided in the embodiments of this application.

[0030] Figure 10 is another example of the format of PPDU provided in the embodiments of this application.

[0031] Figure 11 is a flowchart illustrating a wireless communication method provided in another embodiment of this application.

[0032] Figure 12 is a flowchart illustrating a wireless communication method provided in another embodiment of this application.

[0033] Figure 13 is a structural example diagram of a communication device according to an embodiment of this application.

[0034] Figure 14 is a structural example diagram of a communication device according to another embodiment of this application.

[0035] Figure 15 is a structural example diagram of a communication device according to another embodiment of this application.

[0036] Figure 16 is a structural example diagram of a communication device according to another embodiment of this application.

[0037] Figure 17 is a structural example diagram of a communication device according to another embodiment of this application.

[0038] Figure 18 is a schematic structural diagram of a device applicable to embodiments of this application. Detailed Implementation

[0039] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0040] Communication system

[0041] The technical solutions of this application embodiment can be applied to various communication systems, such as wireless local area networks (WLAN), wireless fidelity (WiFi), or other communication systems.

[0042] Figure 1 illustrates a wireless communication system 100 used in an embodiment of this application. The wireless communication system 100 may include an access point (AP) 110 and a station (STA) 120 that accesses the network through the AP 110.

[0043] In some scenarios, AP is also called AP STA, meaning that in a certain sense, AP is also a type of STA.

[0044] In some scenarios, STA is also called non-AP STA.

[0045] Communication in communication system 100 can be communication between AP and STA, communication between STA and STA, or communication between STA and peer STA. A peer STA can refer to a device that communicates with the STA; for example, a peer STA may be an AP or a STA.

[0046] An access point (AP) acts as a bridge between wired and wireless networks, primarily connecting various wireless network clients together and then connecting the wireless network to the Ethernet. AP devices can be terminal devices with WiFi chips (such as mobile phones) or network devices (such as routers).

[0047] It should be understood that the roles of the various communication devices in the communication system 100 are not absolute. Taking a mobile phone as an example, in a scenario where the mobile phone is connected to a router, the mobile phone is a STA (Station); in a scenario where the mobile phone acts as a hotspot for other mobile phones, the mobile phone acts as an AP (Access Point).

[0048] AP and STA can be devices used in vehicle networking, IoT nodes and sensors in the Internet of Things (IoT), smart cameras, smart remote controls, smart water and electricity meters in smart homes, and sensors in smart cities.

[0049] In some embodiments, both the STA and AP can support the 802.11be standard. The STA or AP can also support various current and future 802.11 family WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0050] One or more links exist between the STA and the AP. In some embodiments, the STA and AP support multi-band communication. For example, the STA and AP can communicate simultaneously on the 2.4 GHz, 5 GHz, 6 GHz, 45 GHz, and 60 GHz bands, or simultaneously on different channels within the same (or different) bands, to improve communication throughput and / or reliability between devices. Such devices are commonly referred to as multi-band devices, or multi-link devices (MLDs), and sometimes also as multi-link entities or multi-band entities. A multi-link device can be an access point device or a site device. If the multi-link device is an access point device, it can contain one or more APs; if the multi-link device is a site device, it can contain one or more non-AP STAs.

[0051] A multi-link device that includes one or more access points (APs) can be called an access point multi-link device (AP MLD), and a multi-link device that includes one or more non-AP STAs can be called a non-access point multi-link device (non-AP MLD).

[0052] In this embodiment of the application, the AP may include multiple APs, and the non-AP STA may include multiple STAs. Multiple links may be formed between the multiple APs and the multiple STAs, and data communication may be performed between the multiple APs and the multiple STAs through the corresponding links.

[0053] In the embodiments of this application, STA can be a mobile phone, tablet computer, laptop computer, handheld computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc., that supports WLAN / WiFi technology.

[0054] WLAN technology can support frequency bands including but not limited to: low frequency bands (e.g., 2.4GHz, 5GHz, 6GHz) and high frequency bands (e.g., 45GHz, 60GHz).

[0055] Figure 1 exemplarily illustrates one AP and two STAs. Optionally, the communication system 100 may include multiple APs and other numbers of STAs, which is not limited in this embodiment. In Figure 1, AP, STA 120a, and STA 120b may reside in the same basic service set (BSS). AP may be associated with STA 120a. AP may be associated with STA 120b.

[0056] It should be understood that in the embodiments of this application, devices with communication functions in the network / system can be referred to as communication devices. Taking the communication system 100 shown in FIG1 as an example, the communication devices may include AP 110 and STA 120 with communication functions. In addition, the communication devices mentioned in the embodiments of this application may also include other devices in the communication system 100, such as network controllers, gateways and other network entities (not shown in FIG1), which are not limited in the embodiments of this application.

[0057] APs and STAs can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on aircraft, balloons, and satellites. This application does not limit the scenarios in which the APs and STAs are located.

[0058] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (e.g., a cloud platform).

[0059] Channel access and WUR technology

[0060] In WiFi, channel access is based on the listen-before-talk (LBT) principle. Related technologies (such as Mustafa Ergen, “IEEE 802.11 Tutorial,” Jun. 2002) provide a variety of channel access mechanisms.

[0061] 802.11ba introduced wake-up signal (WUS) technology. Due to the limited processing power of WUS devices, when operating in the 2.4 GHz band, a 20 MHz bandwidth legacy preamble can be transmitted on the channel, followed by a 4 MHz bandwidth WUS frame. For an introduction to WUS technology, see, for example, "Steve Shellhammer, Alfred Asterjadhi, and Yanjun Sun, IEEE 802.11ba Ultra-Low Power Wake-up Radio Standard, Wiley 2022". Furthermore, to enable the AP to process more non-AP WUS STAs simultaneously, Frequency Division Multiple Access (FDMA) technology was proposed. In FDMA, N (N is an integer greater than 1) 20 MHz channels are used simultaneously, allowing the AP to process N times the number of non-AP WUS STAs.

[0062] AMP devices

[0063] With the development of wireless communication technology, there is a growing desire to integrate wireless communication systems with various vertical industries such as logistics, manufacturing, transportation, and energy. For example, wireless communication systems can be integrated with industrial wireless sensor networks (IWSNs). They can also be integrated with smart logistics and smart warehousing, and even with smart home networks.

[0064] However, in these industries, communication equipment typically needs to be characterized by low cost, small size (e.g., ultra-thin), maintenance-free operation, and long lifespan. Therefore, to meet these requirements, zero-power communication technology can be used. In this scenario, the STA 120 mentioned earlier can be referred to as a "zero-power device" or "AMP device."

[0065] The following section, in conjunction with Figure 2, introduces zero-power communication technology and AMP devices.

[0066] As shown in Figure 2, the AMP device 210 supporting zero-power communication technology may include an energy harvesting module 211 and a backscatter communication module 212. In some cases, the AMP device 210 may also include a low-power computing module 213. The low-power computing module 213 can be used to provide computing functions for the AMP device 210, such as data processing. In other cases, the AMP device 210 may also include a sensor 214 for collecting external information (e.g., ambient temperature, ambient humidity, etc.). In still other cases, the AMP device 210 may also include a memory 215 for storing information (e.g., external information collected by the aforementioned sensors, or such as object identification).

[0067] The energy harvesting module 211 described above is used to harvest energy. In some implementations, energy can be harvested via a power supply signal sent by other devices or via the external environment. The power supply signal can be a radio frequency (RF) signal sent by a network device; therefore, the energy harvesting module described above can be a "radio frequency energy harvesting module".

[0068] Figure 3 illustrates one possible structure of the energy harvesting module 211. As shown in Figure 3, the energy harvesting module 211 can harvest the energy of spatial electromagnetic waves from radio frequency signals based on the principle of electromagnetic induction, and store the harvested energy in capacitor C, which is the charging process of capacitor C. After the charging process of capacitor C is completed, capacitor C can begin to discharge to power the AMP device. For example, the discharge of capacitor C can be used to drive the AMP device to perform low-power demodulation of data transmitted by other devices. Alternatively, the discharge of capacitor C can be used to drive the AMP device to modulate the data to be transmitted. Another example is that the discharge of capacitor C can be used to drive the sensors of the AMP device to acquire data. Yet another example is that the discharge of capacitor C can be used to drive the AMP device to read data from memory 215, etc.

[0069] The principle of backscatter communication is explained below with reference to Figure 4. Referring to Figure 4, the AMP device 210 receives a wireless signal sent by another device and modulates the signal to load the data to be transmitted. Then, the AMP device 210 radiates the modulated signal from its antenna; this information transmission process is called backscatter communication. The aforementioned wireless signal can also be called a carrier signal. A carrier signal can refer to an unmodulated wireless signal. For example, a carrier signal can be a sine wave signal. Backscatter communication and load modulation are inseparable. Load modulation can be understood as adjusting and controlling the circuit parameters of the AMP device's oscillation circuit according to the data flow rhythm, thereby changing parameters such as the impedance of the AMP device and completing the modulation process.

[0070] In some implementations, the AMP device 210 may include an energy harvesting module. The energy harvesting module can be used to harvest any type of signal from the environment. For example, the energy harvesting module can be used to harvest power supply signals sent by other devices or energy from the environment. This application does not specifically limit the form of the power supply signal. For example, the power supply signal can be a modulated wireless signal or an unmodulated wireless signal. A carrier signal as described above can also be used as a power supply signal. Furthermore, the power supply signal can also be a wireless signal of any waveform, such as a sine wave, a square wave, etc.

[0071] In some implementations, the AMP device 210 may also include a logic processing unit to perform corresponding computational functions.

[0072] Typically, load modulation can be achieved through two methods: resistive load modulation and capacitive load modulation. Figure 5 shows the circuit diagram of an AMP device based on resistive load modulation technology. In resistive load modulation, a resistor RL can be connected in parallel with the load. The switch S can be controlled based on binary data stream to turn the resistor RL on or off. Thus, the switching of the resistor RL causes a change in the circuit voltage, and this change in circuit voltage can control the amplitude of the backscattered signal of the AMP device, thereby achieving modulation of the backscattered signal, i.e., amplitude-shift keying (ASK) modulation of the backscattered signal.

[0073] Similarly, in capacitive load modulation, the switching of the capacitor can be controlled based on the binary data stream to change the circuit resonant frequency, thereby changing the operating frequency of the backscattered signal to achieve frequency-shift keying (FSK) modulation.

[0074] In wireless communication networks (such as Wi-Fi networks), the signal (SIG) field in the PPDU can be used to indicate uplink (UL) transmission configuration parameters, such as PPDU length and modulation and coding scheme (MCS) indication. However, for some devices (such as AMP devices), the SIG field may be deleted during UL transmission, resulting in the receiving end (such as AP) being unable to obtain the UL transmission configuration parameters (such as PPDU length and MCS indication). Therefore, how to determine and configure these UL transmission configuration parameters for normal UL PPDU transmission is a technical problem that needs to be solved.

[0075] To address the aforementioned problems, embodiments of this application utilize the excitation field in the PPDU to power the first device or for backscatter communication within the first device, thereby enabling uplink PPDU transmission by the first device. The wireless communication method of this application embodiment will be described in detail below with reference to the accompanying drawings.

[0076] Figure 6 is a flowchart illustrating a wireless communication method provided in an embodiment of this application. The method in Figure 6 is described from the perspective of the interaction between a first device and a second device. The first device can be an AMP device, for example, an AMP STA; or, in some implementations, the first device can be a traditional device (e.g., a STA, smartphone, or tablet computer). The second device can be an AMP device, for example, an AMP AP; or, the second device can also be a traditional device (e.g., an AP, laptop, or tablet computer). In other words, this application does not exclude the possibility of traditional devices using the solution proposed in this application.

[0077] Referring to Figure 6, in step S610, the first device receives the first PPDU. The first PPDU includes an excitation field, which is used to power the first device or for backscatter communication. It should be understood that the second device can send the first PPDU, and the first PPDU can be any PPDU sent by the second device.

[0078] It should be understood that in scenarios involving charging or backscatter communication, the charging duration of the first device can indicate the transmission configuration parameters of the UL PPDU. In other words, in this application, the duration of the excitation field can be used to indicate transmission configuration parameters of the UL PPDU, such as PPDU length, MCS indication, and other transmission configuration parameters.

[0079] This application does not impose specific restrictions on the configuration of the duration of the excitation field. In some implementations, one or more duration values ​​can be predetermined, and the second device can select from these values. That is, the duration of the excitation field belongs to one or more preset fixed durations. In other implementations, a flexible duration can be configured within a duration range (e.g., from 20µs to 1ms). In other words, the duration of the excitation field can be configured by the second device within a predefined time range. This predefined time range can be, for example, 20µs to 1ms.

[0080] It should be understood that if the first device sends energy feedback information (such as the first device's energy harvesting efficiency, remaining energy, etc.) to the second device, the second device can select the duration value of the excitation field based on this energy feedback information. For example, the duration of the excitation field is determined by the second device based on the feedback information from the first device. This feedback information can be energy-related information of the first device, such as the first device's energy harvesting efficiency, remaining energy, etc. It should be noted that this scheme is not applicable to situations where no energy feedback is received from the first device.

[0081] In some implementations, the second device can continuously configure a fixed duration for the excitation field until it receives energy feedback information from the first device. That is, the duration of the excitation field is configured to a preset fixed value before the second device receives the feedback information.

[0082] The above mainly introduced how to determine the duration value of the incentive field. The following section will introduce in detail how to configure the duration value of the incentive field.

[0083] In some implementations, fields in the first PPDU can be used to indicate the duration value of the stimulus field. For example, the first PPDU includes a first field located before the stimulus field, which is used to indicate the duration of the stimulus field.

[0084] For example, referring to Figure 7, the first PPDU includes a preamble, and the first field is the first SIG field in the preamble. The first SIG field includes a PPDU length field, which is used to indicate the duration of the excitation field. The first SIG field provided in various embodiments of this application can be referred to as a legacy SIG field (L-SIG).

[0085] Optionally, when the PPDU length field in the first PPDU is used to indicate the duration of the stimulus field, the PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU. The duration of the stimulus field can be in symbols, or other units such as bytes or microseconds.

[0086] For example, the first field is located between the leading field and the excitation field of the first PPDU. The first field is used to indicate the duration of one or more excitation fields following the first field. Continuing to refer to Figure 7, the first field is the second SIG field or data field.

[0087] Optionally, when using the SIG field or data field to indicate the duration of the incentive field, the first field can be used to indicate the duration of multiple incentive fields following the first field, and the first field can also be used to indicate the number of multiple incentive fields.

[0088] Optionally, when using a SIG field or a data field to indicate the duration of an excitation field, the first field is used to indicate the duration of multiple excitation fields following the first field. These multiple excitation fields have different durations, and the first field indicates multiple values, each corresponding to a different duration of the excitation field. For example, referring to Figure 8, the first field can indicate two values, corresponding to excitation field 1 and excitation field 2, respectively. In some implementations, the first field can, for example, indicate that the duration of excitation field 1 is shorter than the duration of excitation field 2.

[0089] Considering that the excitation field can be used for backscatter communication by the first device, there is still a problem that the receiving end (such as the AP device) does not know the transmission parameters of the UL PPDU (such as MCS, payload size, etc.) during the backscatter communication process. Therefore, how to configure the duration of the excitation field to indicate the transmission parameters of the UL PPDU is also a technical problem that needs to be solved.

[0090] In some implementations, the same solution as the power excitation field can be considered. For example, the first device transmits a second PPDU during backscatter communication, and the duration of the excitation field is determined based on the second PPDU.

[0091] In some implementations, the duration of the excitation field is determined based on the end time of the transmission of the second PPDU. For example, the second device (such as an AP) can continue sending the excitation field until the second device knows the end time of the transmission of the second PPDU in the backscatter communication process, which is the duration of the excitation field.

[0092] In other implementations, the second PPDU contains first information indicating the length of the second PPDU, and the duration of the excitation field is determined based on this first information. Optionally, the first information may be carried in the SIG field, MAC header, or data field of the second PPDU; or, the first information may be a synchronization sequence in the second PPDU. As an example, the UL indication of the PPDU length (the first information) may be included in the SIG field, MAC header, or data field (also referred to as the payload field) of the second PPDU, or implicitly use the synchronization sequence as the first indication information to indicate the duration of the excitation field. It should be understood that once the second device receives the first information, the second device will know when to stop backscattering the excitation field.

[0093] In some implementations, the duration of the excitation field can be determined based on predefined information before the first information is received. For example, the duration of the excitation field can be a predefined maximum duration to ensure the uplink transmission time of the second PPDU.

[0094] It should be noted that the length of the UL PPDU (such as the second PPDU) can be pre-configured to one or more fixed lengths. In the case of multiple lengths, the UL PPDU length can be changed. The second device should know the UL PPDU length at a specific time. If the UL PPDU stops, the second device should also stop the backscatter excitation field (excitation should also stop). If the UL PPDU length is shorter than the duration of the configured excitation field, a padding method can be used to fill the length of the UL PPDU, as shown in Figure 9.

[0095] In some implementations, the second device can configure the length of the backscatter excitation field based on previously received PPDUs. That is, the PPDUs previously received by the second device can be PPDUs sent to the second device by the first device before receiving the first PPDU.

[0096] As an example, the excitation field is used by the first device for backscatter communication, and the duration of the excitation field is determined based on the third PPDU, which is the PPDU transmitted by the first device before receiving the first PPDU.

[0097] Furthermore, the second device can configure the length of the backscatter excitation field based on the previously received PPDU length or payload size, or the received signaling containing a UL PPDU length indication. That is, the duration of the excitation field is determined based on the PPDU length, data size, or uplink transmission parameters carried in the third PPDU.

[0098] In some implementations, the first device may indicate to the second device the expected duration of the excitation field for the next uplink transmission (UL Tx) timing, and the second device may configure the duration of the excitation field for backscatter communication in the first PPDU based on the expected duration of the excitation field.

[0099] As an example, referring to Figure 10, the excitation field is a first excitation field, which is used by the first device to perform backscatter communication. The duration of the first excitation field is determined based on the indication information carried in the field (such as the second excitation field) located before the first excitation field in the first PPDU.

[0100] Furthermore, the first device can indicate to the second device the expected UL MCS and payload size for the next uplink transmission (UL Tx) timing, and the second device can configure the duration of the corresponding excitation field. That is, the second excitation field can be used to indicate the size of the uplink transmission parameters and / or uplink data corresponding to the first excitation field.

[0101] In some implementations, the first PPDU includes a preamble, which includes a first SIG field. The PPDU length field in the first SIG field can be used to indicate one of the following: the duration of the first PPDU; a fixed value; or information related to the excitation field in the first PPDU.

[0102] For example, if the second device knows the duration of all fields of the PPDU (including the excitation field), the second device can indicate the duration of the first PPDU through the PPDU length field in the first SIG field.

[0103] For example, if the second device does not know the duration of the fields in the PPDU, the second device can indicate a fixed value (such as the maximum or minimum duration of the excitation field) through the PPDU length field in the first SIG field.

[0104] For example, if the second device does not know the duration of the fields in the PPDU, but the exciter can determine that the current PPDU is an AMP PPDU, the second device can indicate the relevant information of the excitation fields in the first PPDU through the PPDU length field in the first SIG field. For instance, the first SIG field can be used to send a signal to the exciter to indicate the relevant information of the excitation fields in the first PPDU.

[0105] It should be understood that the solution in this application can be applied to both short distance backscattering (SDBS) and long distance backscattering (LDBS) scenarios.

[0106] It should be understood that LDBS can use bi-static mode, in which the excitation field may be sent through the exciter instead of from the AP.

[0107] In other words, the second device can send at least some fields of the first PPDU to the first device. The first PPDU includes an excitation field, which is used to power the first device or for the first device to perform backscatter communication.

[0108] For example, when the second device sends a portion of the fields in the first PPDU to the first device, the exciter can send the excitation fields in the first PPDU to the first device.

[0109] The following section, with examples, details a scheme for sending the excitation field from the first PPDU to the first device using an exciter in an LDBS scenario. It should be understood that the descriptions of some method embodiments in the LDBS scenario correspond to the descriptions of some method embodiments described above; therefore, for parts not described in detail, please refer to the preceding method embodiments.

[0110] Figure 11 is a flowchart illustrating another possible wireless communication method provided in an embodiment of this application. The method shown in Figure 11 can be applied to an exciter. In this application, the exciter can be a charging device that charges a first device. For example, the exciter can be a smartphone, a computer, or other charging device. This application does not impose any specific limitations on this.

[0111] Referring to Figure 11, in step S1110, the third device sends the excitation field from the first PPDU to the first device. The excitation field is used to power the first device or for the first device to perform backscatter communication. The third device can be any type of exciter mentioned above.

[0112] In some implementations, fields in the first PPDU can be used to indicate the duration value of the stimulus field. For example, the first PPDU includes a first field located before the stimulus field, which is used to indicate the duration of the stimulus field.

[0113] For example, referring again to Figure 7, the first PPDU includes a leader, the first field is the first SIG field in the leader, the first SIG field includes a PPDU length field, the PPDU length field is used to indicate the duration of the excitation field.

[0114] Optionally, when the PPDU length field in the first PPDU is used to indicate the duration of the excitation field, the PPDU length field is used to indicate the duration of the first excitation field of the first PPDU, or to indicate the duration of all excitation fields in the first PPDU.

[0115] For example, the first field is located between the leading field and the stimulus field of the first PPDU. The first field is used to indicate the duration of one or more stimulus fields following the first field. Continuing to refer to Figure 7, the first field is either the second SIG field or a data field. It should be understood that the second SIG field and the first SIG field can be the same SIG field.

[0116] Optionally, when using the SIG field or data field to indicate the duration of the incentive field, the first field can be used to indicate the duration of multiple incentive fields following the first field, and the first field can also be used to indicate the number of multiple incentive fields.

[0117] Optionally, when using a SIG field or a data field to indicate the duration of an excitation field, the first field is used to indicate the duration of multiple excitation fields following the first field. These multiple excitation fields have different durations, and the first field indicates multiple values, each corresponding to a different duration of the excitation field. For example, referring back to Figure 8, the first field can indicate two values, corresponding to excitation field 1 and excitation field 2, respectively. In some implementations, the first field can, for example, indicate that the duration of excitation field 1 is shorter than the duration of excitation field 2.

[0118] Considering that the excitation field can be used for backscatter communication by the first device, there is still a problem that the receiving end (such as the AP device) does not know the transmission parameters of the UL PPDU (such as MCS, payload size, etc.) during the backscatter communication process. Therefore, how to configure the duration of the excitation field to indicate the transmission parameters of the UL PPDU is also a technical problem that needs to be solved.

[0119] In some implementations, the excitation field can be used by a first device to perform backscatter communication, during which the first device transmits a second PPDU. The duration of the excitation field can be determined based on the second PPDU.

[0120] In one implementation, a third device (such as an energizer) continuously sends an excitation field until the second device receives a transmission completion indication for the second PPDU (corresponding to the first information mentioned above). The transmission completion indication refers to any type of information capable of determining the end time of transmission for the second PPDU. This indication can explicitly indicate the end time of transmission for the second PPDU (e.g., the transmission completion indication is used to indicate the length of the second PPDU). For example, the transmission completion indication can be carried in the SIG field, MAC header, or data field (UL payload) of the second PPDU. Alternatively, the transmission completion indication can implicitly indicate the end time of transmission for the second PPDU. Exemplarily, the transmission completion indication can be a synchronization sequence within the second PPDU, based on which the end time of the second PPDU can be determined.

[0121] In another implementation, the second device assumes and configures a predefined excitation field length for the third device, such as a maximum allowed length. Several options are possible for the second PPDU length. The second device can change the excitation field length. If the actual transmitted field is shorter than the excitation field length, padding bits can be used.

[0122] In another implementation, the second device can configure the excitation field length of the third device based on the previously received second PPDU length or payload length. For example, the longest received second PPDU length can be configured.

[0123] In another implementation, the first device (which may be at the current transmission time) indicates to the second device the desired UL MSC and / or payload size for the next uplink transmission time, and the second device configures the third device according to the indication.

[0124] In another implementation, the first device indicates to the third device the desired UL MSC and / or payload size for the next uplink transmission timing.

[0125] The above mainly introduced the scheme for determining and / or configuring the duration of the excitation field in the reflection-scattering communication process. The following section, with examples, introduces the scheme for the first device to actively feed back the uplink transmission parameters of the UL PPDU (such as PPDU length, MSC indication, and other uplink transmission parameters).

[0126] Figure 12 is a flowchart illustrating another possible wireless communication method provided in an embodiment of this application. The method in Figure 12 is described from the perspective of the interaction between a first device and a second device. The first device can be an AMP device, for example, an AMP STA, or in some implementations, a traditional device (e.g., a STA, smartphone, or tablet computer); the second device can be an AMP device, for example, an AMP AP, or a traditional device (e.g., an AP, laptop, or tablet computer). In other words, embodiments of this application do not exclude the possibility of traditional devices using the solutions proposed in these embodiments.

[0127] Referring to Figure 12, in step S1210, the first device sends an uplink PPDU to the second device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: the uplink transmission parameters are carried in the uplink PPDU; the uplink transmission parameters are determined based on the configuration information of the second device; the first device sends the uplink PPDU based on the fixed uplink transmission parameters configured by the second device.

[0128] In some implementations, the uplink transmission parameters include one or more of the following: PPDU length, MCS, and data rate.

[0129] In some implementations, if the SIG field is included in the UL PPDU, the PPDU length can be specified in that SIG field. For example, uplink transmission parameters are carried in the SIG field of the uplink PPDU.

[0130] In some implementations, if the SIG field is not included in the UL PPDU, an existing field can be used. For example, uplink transmission parameters are carried in the MAC header of the uplink PPDU.

[0131] In some implementations, the MAC header may include, but is not limited to, the following fields: frame control field, duration field, sequence control field, one of the address fields, or new fields.

[0132] In some implementations, the second device receives the MAC header based on fixed uplink transmission parameters. These fixed uplink transmission parameters may be, for example, a minimum data rate and / or a minimum MSC level indication.

[0133] In some implementations, the uplink transmission parameters are determined based on the configuration information of the second device. As an example, in the case where the second device triggers an inventory use case from the first device without any prior interaction, the second device can assume a fixed set of uplink transmission parameters, including PPDU length, MSC indication, data rate, etc.

[0134] As an example, the second device may assume a maximum possible PPDU length, minimum MCS level, minimum data rate, etc.

[0135] It should be noted that the technical solutions of the above embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope of this application.

[0136] The method embodiments of this application have been described in detail above with reference to Figures 1 to 12. The apparatus embodiments of this application will be described in detail below with reference to Figures 13 to 18. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be referred to the preceding method embodiments.

[0137] Figure 13 is a structural example diagram of a communication device provided in an embodiment of this application. The communication device 1300 shown in Figure 13 can be the first device mentioned above. The communication device 1300 includes a first receiving module 1310. The first receiving module 1310 is used to receive a first PPDU, the first PPDU including an excitation field, the excitation field being used to power the first device or for the first device to perform backscatter communication.

[0138] In some implementations, the duration of the stimulus field is one or more preset fixed durations; or, the duration of the stimulus field is configured by a second device within a predefined time range.

[0139] In some implementations, the duration of the stimulus field is determined by the second device based on feedback information from the first device.

[0140] In some implementations, the feedback information is energy-related information of the first device.

[0141] In some implementations, the energy-related information is used to indicate the energy harvesting efficiency of the first device and / or the remaining energy of the first device.

[0142] In some implementations, the duration of the stimulus field is configured to a preset fixed value before the second device receives the feedback information.

[0143] In some implementations, the first PPDU includes a first field preceding the stimulus field, the first field indicating the duration of the stimulus field.

[0144] In some implementations, the first PPDU includes a preamble, the first field being a first SIG field in the preamble, the first SIG field including a PPDU length field, the PPDU length field being used to indicate the duration of the stimulus field.

[0145] In some implementations, the PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

[0146] In some implementations, the first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields following the first field.

[0147] In some implementations, the first field is a second SIG field or a data field.

[0148] In some implementations, the first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

[0149] In some implementations, the first field is used to indicate the duration of a plurality of incentive fields following the first field, the duration of the plurality of incentive fields being different, and the first field indicating a plurality of values, the plurality of values ​​respectively corresponding to the duration of the plurality of incentive fields.

[0150] In some implementations, the excitation field is used by the first device to perform backscatter communication, during which the first device transmits a second PPDU, and the duration of the excitation field is determined based on the second PPDU.

[0151] In some implementations, the second PPDU includes first information indicating the length of the second PPDU, and the duration of the excitation field is determined based on the first information; and / or, the duration of the excitation field is determined based on the end time of the transmission of the second PPDU.

[0152] In some implementations, the first information is carried in the SIG field, MAC header, and data field of the second PPDU; or, the first information is the synchronization sequence in the second PPDU.

[0153] In some implementations, the duration of the stimulus field is determined based on predefined information before the first information is received.

[0154] In some implementations, the duration of the incentive field is a predefined maximum duration.

[0155] In some implementations, the excitation field is used by the first device for backscatter communication, and the duration of the excitation field is determined based on a third PPDU, which is a PPDU transmitted by the first device before receiving the first PPDU.

[0156] In some implementations, the duration of the excitation field is determined based on the PPDU length, data size, or uplink transmission parameters carried in the third PPDU.

[0157] In some implementations, the excitation field is a first excitation field, which is used by the first device for backscatter communication. The duration of the first excitation field is determined based on the indication information carried in the second excitation field in the first PPDU that precedes the first excitation field.

[0158] In some implementations, the second stimulus field is used to indicate the size of the uplink transmission parameters and / or uplink data corresponding to the first stimulus field.

[0159] In some implementations, the first PPDU includes a preamble, which includes a first SIG field. The PPDU length field in the first SIG field is used to indicate one of the following: the duration of the first PPDU; a fixed value; or information related to the excitation field in the first PPDU.

[0160] In some implementations, the first device is an AMP device.

[0161] Figure 14 is a structural example diagram of a communication device provided in an embodiment of this application. The communication device 1400 shown in Figure 14 can be the second device mentioned above. The communication device 1400 includes a first transmitting module 1410. The first transmitting module 1410 is used to transmit at least a portion of the fields in a first PPDU to the first device. The first PPDU includes an excitation field, which is used to power the first device or for the first device to perform backscatter communication.

[0162] In some implementations, the duration of the stimulus field is one or more preset fixed durations; or, the duration of the stimulus field is configured by a second device within a predefined time range.

[0163] In some implementations, the duration of the stimulus field is determined by the second device based on feedback information from the first device.

[0164] In some implementations, the feedback information is energy-related information of the first device.

[0165] In some implementations, the energy-related information is used to indicate the energy harvesting efficiency of the first device and / or the remaining energy of the first device.

[0166] In some implementations, the duration of the stimulus field is configured to a preset fixed value before the second device receives the feedback information.

[0167] In some implementations, the first PPDU includes a first field preceding the stimulus field, the first field indicating the duration of the stimulus field.

[0168] In some implementations, the first PPDU includes a preamble, the first field being a first SIG field in the preamble, the first SIG field including a PPDU length field, the PPDU length field being used to indicate the duration of the stimulus field.

[0169] In some implementations, the PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

[0170] In some implementations, the first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields following the first field.

[0171] In some implementations, the first field is a second SIG field or a data field.

[0172] In some implementations, the first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

[0173] In some implementations, the first field is used to indicate the duration of a plurality of incentive fields following the first field, the duration of the plurality of incentive fields being different, and the first field indicating a plurality of values, the plurality of values ​​respectively corresponding to the duration of the plurality of incentive fields.

[0174] In some implementations, the excitation field is used by the first device to perform backscatter communication, during which the first device transmits a second PPDU, and the duration of the excitation field is determined based on the second PPDU.

[0175] In some implementations, the second PPDU includes first information indicating the length of the second PPDU, and the duration of the excitation field is determined based on the first information; and / or, the duration of the excitation field is determined based on the end time of the transmission of the second PPDU.

[0176] In some implementations, the first information is carried in the SIG field, MAC header, and data field of the second PPDU; or, the first information is the synchronization sequence in the second PPDU.

[0177] In some implementations, the duration of the stimulus field is determined based on predefined information before the first information is received.

[0178] In some implementations, the duration of the incentive field is a predefined maximum duration.

[0179] In some implementations, the excitation field is used by the first device for backscatter communication, and the duration of the excitation field is determined based on a third PPDU, which is a PPDU transmitted by the first device before receiving the first PPDU.

[0180] In some implementations, the duration of the excitation field is determined based on the PPDU length, data size, or uplink transmission parameters carried in the third PPDU.

[0181] In some implementations, the excitation field is a first excitation field, which is used by the first device for backscatter communication. The duration of the first excitation field is determined based on the indication information carried in the second excitation field in the first PPDU that precedes the first excitation field.

[0182] In some implementations, the second stimulus field is used to indicate the size of the uplink transmission parameters and / or uplink data corresponding to the first stimulus field.

[0183] In some implementations, the first PPDU includes a preamble, which includes a first SIG field. The PPDU length field in the first SIG field is used to indicate one of the following: the duration of the first PPDU; a fixed value; or information related to the excitation field in the first PPDU.

[0184] In some implementations, the first device is an AMP device.

[0185] Figure 15 is a structural example diagram of a communication device provided in an embodiment of this application. The communication device 1500 shown in Figure 15 can be the third device mentioned above. The communication device 1500 includes a second transmitting module 1510. The second transmitting module 1510 is used to transmit an excitation field in a first PPDU to a first device, the excitation field being used to power the first device or for the first device to perform backscatter communication.

[0186] In some implementations, the communication device further includes: a second receiving module, configured to receive a first field of the first PPDU sent by the second device, the first field being located before the excitation field, and the first field being used to indicate the duration of the excitation field.

[0187] In some implementations, the first PPDU includes a preamble, the first field being a first SIG field in the preamble, the first SIG field including a PPDU length field, the PPDU length field being used to indicate the duration of the stimulus field.

[0188] In some implementations, the PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

[0189] In some implementations, the first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields located after the first field.

[0190] In some implementations, the first field is a second SIG field or a data field.

[0191] In some implementations, the first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

[0192] In some implementations, the first field is used to indicate multiple incentive fields following the first field, and the duration of the multiple incentive fields is different. The first field indicates multiple values, and the multiple values ​​correspond to the duration of the multiple incentive fields respectively.

[0193] In some implementations, the excitation field is used by the first device to perform backscatter communication, and the duration of the excitation field is determined based on the first information sent by the second device to the third device during the backscatter communication.

[0194] In some implementations, the duration of the excitation field is determined based on predefined information or the configuration information of the second device before the first information is received.

[0195] In some implementations, the duration of the stimulus field is a predefined maximum duration before the first information is received.

[0196] In some implementations, the first PPDU includes a preamble, which includes a first SIG field. The PPDU length field in the first SIG field is used to indicate one of the following: the duration of the first PPDU; a fixed value; or information related to the excitation field in the first PPDU.

[0197] In some implementations, the first device is an AMP device.

[0198] Figure 16 is a structural example diagram of a communication device provided in an embodiment of this application. The communication device 1600 shown in Figure 16 can be the first device mentioned above. The communication device 1600 includes a third transmitting module 1610. The third transmitting module 1610 is used to transmit an uplink PPDU to a second device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: the uplink transmission parameters are carried in the uplink PPDU; the uplink transmission parameters are determined based on the configuration information of the second device; the first device transmits the uplink PPDU based on fixed uplink transmission parameters configured by the second device.

[0199] In some implementations, the uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the SIG field of the uplink PPDU.

[0200] In some implementations, the uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the MAC header of the uplink PPDU.

[0201] In some implementations, the second device receives the MAC header based on fixed uplink transmission parameters.

[0202] In some implementations, the uplink transmission parameters include one or more of the following: the length of the PPDU, the MCS, and the data rate.

[0203] In some implementations, the first device is an AMP device.

[0204] Figure 17 is a structural example diagram of a communication device provided in an embodiment of this application. The communication device 1700 shown in Figure 17 can be the second device mentioned above. The communication device 1700 includes a third receiving module 1710. The third receiving module 1710 is used to receive an uplink PPDU sent by a first device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: the uplink transmission parameters are carried in the uplink PPDU; the uplink transmission parameters are determined based on the configuration information of the second device; the second device receives the uplink PPDU based on the fixed uplink transmission parameters configured by the second device.

[0205] In some implementations, the uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the SIG field of the uplink PPDU.

[0206] In some implementations, the uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the MAC header of the uplink PPDU.

[0207] In some implementations, the second device receives the MAC header based on fixed uplink transmission parameters.

[0208] In some implementations, the uplink transmission parameters include one or more of the following: the length of the PPDU, the MCS, and the data rate.

[0209] In some implementations, the first device is an AMP device.

[0210] Figure 18 is a schematic structural diagram of a communication apparatus according to an embodiment of this application. The dashed lines in Figure 18 indicate that the unit or module is optional. The apparatus 1800 can be used to implement the methods described in the above method embodiments. The apparatus 1800 can be a chip or a communication device.

[0211] Apparatus 1800 may include one or more processors 1810. The processor 1810 may support apparatus 1800 in implementing the methods described in the preceding method embodiments. The processor 1810 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0212] The apparatus 1800 may further include one or more memories 1820. The memories 1820 store a program that can be executed by the processor 1810, causing the processor 1810 to perform the methods described in the preceding method embodiments. The memories 1820 may be independent of the processor 1810 or integrated within the processor 1810.

[0213] The device 1800 may also include a transceiver 1830. The processor 1810 can communicate with other devices or chips via the transceiver 1830. For example, the processor 1810 can send and receive data with other devices or chips via the transceiver 1830.

[0214] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to the communication device provided in this application, and the program causes a computer to execute the methods performed by the communication device in various embodiments of this application.

[0215] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the communication device provided in this application embodiment, and the program causes a computer to execute the methods performed by the communication device in various embodiments of this application.

[0216] This application also provides a computer program. This computer program can be applied to the terminal or network device provided in this application, and causes the computer to execute the methods performed by the communication device in various embodiments of this application.

[0217] It should be understood that the terms "system" and "network" in this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0218] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0219] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0220] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0221] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0222] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0223] In the embodiments of this application, "comprising" can refer to direct inclusion or indirect inclusion. Optionally, "comprising" mentioned in the embodiments of this application can be replaced with "indicating" or "used to determine". For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B".

[0224] In the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0225] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the WiFi protocol and related protocols applied to future WiFi communication systems, and this application does not limit it.

[0226] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0227] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0228] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0229] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs, DVDs) or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0230] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, include: The first device receives a first PPDU, the first PPDU including an excitation field, the excitation field being used to power the first device or for the first device to perform backscatter communication.

2. The method according to claim 1, characterized in that: The duration of the stimulus field belongs to one or more preset fixed durations; or, The duration of the stimulus field is configured by the second device within a predefined time range.

3. The method according to claim 1 or 2, characterized in that, The duration of the stimulus field is determined by the second device based on the feedback information from the first device.

4. The method according to claim 3, characterized in that, The feedback information is energy-related information of the first device.

5. The method according to claim 4, characterized in that, The energy-related information is used to indicate the energy harvesting efficiency of the first device and / or the remaining energy of the first device.

6. The method according to any one of claims 3 to 5, characterized in that, Before the second device receives the feedback information, the duration of the excitation field is configured to a preset fixed value.

7. The method according to any one of claims 1 to 6, characterized in that, The first PPDU includes a first field located before the stimulus field, the first field being used to indicate the duration of the stimulus field.

8. The method according to claim 7, characterized in that, The first PPDU includes a preamble, and the first field is the first SIG field in the preamble. The first SIG field includes a PPDU length field, which is used to indicate the duration of the excitation field.

9. The method according to claim 8, characterized in that, The PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

10. The method according to claim 7, characterized in that, The first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields following the first field.

11. The method according to claim 10, characterized in that, The first field is either the second SIG field or a data field.

12. The method according to claim 10 or 11, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

13. The method according to any one of claims 10 to 12, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field. The duration of the plurality of incentive fields is different. The first field indicates a plurality of values, and the plurality of values ​​correspond to the duration of the plurality of incentive fields respectively.

14. The method according to claim 1, characterized in that, The excitation field is used by the first device to perform backscatter communication, during which the first device transmits a second PPDU, and the duration of the excitation field is determined based on the second PPDU.

15. The method according to claim 14, characterized in that, The second PPDU contains first information indicating the length of the second PPDU, and the duration of the excitation field is determined based on the first information; and / or, The duration of the excitation field is determined based on the end time of the transmission of the second PPDU.

16. The method according to claim 15, characterized in that: The first information is carried in the SIG field, MAC header, and data field of the second PPDU; or, The first information is the synchronization sequence in the second PPDU.

17. The method according to any one of claims 14 to 16, characterized in that, Before receiving the first information, the duration of the stimulus field is determined based on predefined information.

18. The method according to claim 17, characterized in that, The duration of the incentive field is a predefined maximum duration.

19. The method according to claim 1, characterized in that, The excitation field is used by the first device to perform backscatter communication. The duration of the excitation field is determined based on a third PPDU, which is a PPDU transmitted by the first device before receiving the first PPDU.

20. The method according to claim 19, characterized in that, The duration of the excitation field is determined based on the PPDU length, data size, or uplink transmission parameters carried in the third PPDU.

21. The method according to claim 1, characterized in that, The excitation field is a first excitation field, which is used by the first device to perform backscatter communication. The duration of the first excitation field is determined based on the indication information carried in the second excitation field located before the first excitation field in the first PPDU.

22. The method according to claim 21, characterized in that, The second incentive field is used to indicate the size of the uplink transmission parameters and / or uplink data corresponding to the first incentive field.

23. The method according to any one of claims 1 to 22, characterized in that, The first PPDU includes a leader, the leader including a first SIG field, the PPDU length field in the first SIG field being used to indicate one of the following: The duration of the first PPDU; Fixed value; Information related to the excitation field in the first PPDU.

24. The method according to any one of claims 1 to 23, characterized in that, The first device is an AMP device.

25. A communication method, characterized in that, include: The second device sends at least some fields of a first PPDU to the first device. The first PPDU includes an excitation field, which is used to power the first device or for the first device to perform backscatter communication.

26. The method according to claim 25, characterized in that: The duration of the stimulus field belongs to one or more preset fixed durations; or, The duration of the stimulus field is configured by the second device within a predefined time range.

27. The method according to claim 25 or 26, characterized in that, The duration of the stimulus field is determined by the second device based on the feedback information from the first device.

28. The method according to claim 27, characterized in that, The feedback information is energy-related information of the first device.

29. The method according to claim 28, characterized in that, The energy-related information is used to indicate the energy harvesting efficiency of the first device and / or the remaining energy of the first device.

30. The method according to any one of claims 27 to 29, characterized in that, Before the second device receives the feedback information, the duration of the excitation field is configured to a preset fixed value.

31. The method according to any one of claims 25 to 30, characterized in that, The first PPDU includes a first field located before the stimulus field, the first field being used to indicate the duration of the stimulus field.

32. The method according to claim 31, characterized in that, The first PPDU includes a preamble, and the first field is the first SIG field in the preamble. The first SIG field includes a PPDU length field, which is used to indicate the duration of the excitation field.

33. The method according to claim 32, characterized in that, The PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

34. The method according to claim 31, characterized in that, The first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields following the first field.

35. The method according to claim 34, characterized in that, The first field is either the second SIG field or a data field.

36. The method according to claim 34 or 35, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

37. The method according to any one of claims 34 to 36, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field. The duration of the plurality of incentive fields is different. The first field indicates a plurality of values, and the plurality of values ​​correspond to the duration of the plurality of incentive fields respectively.

38. The method according to claim 25, characterized in that, The excitation field is used by the first device to perform backscatter communication, during which the first device transmits a second PPDU, and the duration of the excitation field is determined based on the second PPDU.

39. The method according to claim 38, characterized in that, The second PPDU contains first information indicating the length of the second PPDU, and the duration of the excitation field is determined based on the first information; and / or, The duration of the excitation field is determined based on the end time of the transmission of the second PPDU.

40. The method according to claim 39, characterized in that: The first information is carried in the SIG field, MAC header, and data field of the second PPDU; or, The first information is the synchronization sequence in the second PPDU.

41. The method according to any one of claims 38 to 40, characterized in that, Before receiving the first information, the duration of the stimulus field is determined based on predefined information.

42. The method according to claim 41, characterized in that, Before receiving the first information, the duration of the stimulus field is a predefined maximum duration.

43. The method according to claim 25, characterized in that, The excitation field is used by the first device to perform backscatter communication. The duration of the excitation field is determined based on a third PPDU, which is a PPDU transmitted by the first device before receiving the first PPDU.

44. The method according to claim 43, characterized in that, The duration of the excitation field is determined based on the PPDU length, data size, or uplink transmission parameters carried in the third PPDU.

45. The method according to claim 25, characterized in that, The excitation field is a first excitation field, which is used by the first device to perform backscatter communication. The duration of the first excitation field is determined based on the indication information carried in the second excitation field located before the first excitation field in the first PPDU.

46. ​​The method according to claim 45, characterized in that, The second incentive field is used to indicate the size of the uplink transmission parameters and / or uplink data corresponding to the first incentive field.

47. The method according to any one of claims 25 to 46, characterized in that, The first PPDU includes a leader, the leader including a first SIG field, the PPDU length field in the first SIG field being used to indicate one of the following: The duration of the first PPDU; Fixed value; Information related to the excitation field in the first PPDU.

48. The method according to any one of claims 25 to 47, characterized in that, The first device is an AMP device.

49. A communication method, characterized in that, include: The third device sends the excitation field from the first PPDU to the first device. The excitation field is used to power the first device or to enable the first device to perform backscatter communication.

50. The method according to claim 49, characterized in that, The method further includes: The third device receives a first field of the first PPDU sent by the second device. The first field is located before the excitation field and is used to indicate the duration of the excitation field.

51. The method according to claim 50, characterized in that, The first PPDU includes a preamble, and the first field is the first SIG field in the preamble. The first SIG field includes a PPDU length field, which is used to indicate the duration of the excitation field.

52. The method according to claim 51, characterized in that, The PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

53. The method according to claim 50, characterized in that, The first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields located after the first field.

54. The method according to claim 53, characterized in that, The first field is either the second SIG field or a data field.

55. The method according to claim 53 or 54, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

56. The method according to any one of claims 53 to 55, characterized in that, The first field is used to indicate multiple incentive fields following the first field, and the duration of the multiple incentive fields is different. The first field indicates multiple values, and the multiple values ​​correspond to the duration of the multiple incentive fields respectively.

57. The method according to claim 49, characterized in that, The excitation field is used by the first device to perform backscatter communication, and the duration of the excitation field is determined based on the first information sent by the second device to the third device during the backscatter communication.

58. The method according to claim 57, characterized in that, Before receiving the first information, the duration of the excitation field is determined based on predefined information or the configuration information of the second device.

59. The method according to claim 58, characterized in that, Before receiving the first information, the duration of the stimulus field is a predefined maximum duration.

60. The method according to any one of claims 49 to 59, characterized in that, The first PPDU includes a leader, the leader including a first SIG field, the PPDU length field in the first SIG field being used to indicate one of the following: The duration of the first PPDU; Fixed value; Information related to the excitation field in the first PPDU.

61. The method according to any one of claims 49 to 60, characterized in that, The first device is an AMP device.

62. A communication method, characterized in that, include: The first device sends an uplink PPDU to the second device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: The uplink transmission parameters are carried in the uplink PPDU; The uplink transmission parameters are determined based on the configuration information of the second device; The first device sends the uplink PPDU based on fixed uplink transmission parameters configured by the second device.

63. The method according to claim 62, characterized in that, The uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the SIG field of the uplink PPDU.

64. The method according to claim 62, characterized in that, The uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the MAC header of the uplink PPDU.

65. The method according to claim 64, characterized in that, The second device receives the MAC header based on fixed uplink transmission parameters.

66. The method according to any one of claims 62 to 65, characterized in that, The uplink transmission parameters include one or more of the following: the length of the PPDU, the MCS, and the data rate.

67. The method according to any one of claims 62 to 66, characterized in that, The first device is an AMP device.

68. A communication method, characterized in that, include: The second device receives an uplink PPDU sent by the first device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: The uplink transmission parameters are carried in the uplink PPDU; The uplink transmission parameters are determined based on the configuration information of the second device; The second device receives the uplink PPDU based on fixed uplink transmission parameters configured in the second device.

69. The method according to claim 68, characterized in that, The uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the SIG field of the uplink PPDU.

70. The method according to claim 68, characterized in that, The uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the MAC header of the uplink PPDU.

71. The method according to claim 70, characterized in that, The second device receives the MAC header based on fixed uplink transmission parameters.

72. The method according to any one of claims 68 to 71, characterized in that, The uplink transmission parameters include one or more of the following: the length of the PPDU, the MCS, and the data rate.

73. The method according to any one of claims 68 to 72, characterized in that, The first device is an AMP device.

74. A communication device, characterized in that, The communication device is a first device, and the communication device includes: A first receiving module is configured to receive a first PPDU, the first PPDU including an excitation field, the excitation field being used to power the first device or for the first device to perform backscatter communication.

75. The communication device according to claim 74, characterized in that: The duration of the stimulus field belongs to one or more preset fixed durations; or, The duration of the stimulus field is configured by the second device within a predefined time range.

76. The communication device according to claim 74 or 75, characterized in that, The duration of the stimulus field is determined by the second device based on the feedback information from the first device.

77. The communication device according to claim 76, characterized in that, The feedback information is energy-related information of the first device.

78. The communication device according to claim 77, characterized in that, The energy-related information is used to indicate the energy harvesting efficiency of the first device and / or the remaining energy of the first device.

79. The communication device according to any one of claims 76 to 78, characterized in that, Before the second device receives the feedback information, the duration of the excitation field is configured to a preset fixed value.

80. The communication device according to any one of claims 74 to 79, characterized in that, The first PPDU includes a first field located before the stimulus field, the first field being used to indicate the duration of the stimulus field.

81. The communication device according to claim 80, characterized in that, The first PPDU includes a preamble, and the first field is the first SIG field in the preamble. The first SIG field includes a PPDU length field, which is used to indicate the duration of the excitation field.

82. The communication device according to claim 81, characterized in that, The PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

83. The communication device according to claim 80, characterized in that, The first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields following the first field.

84. The communication device according to claim 83, characterized in that, The first field is either the second SIG field or a data field.

85. The communication device according to claim 83 or 84, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

86. The communication device according to any one of claims 83 to 85, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field. The duration of the plurality of incentive fields is different. The first field indicates a plurality of values, and the plurality of values ​​correspond to the duration of the plurality of incentive fields respectively.

87. The communication device according to claim 74, characterized in that, The excitation field is used by the first device to perform backscatter communication, during which the first device transmits a second PPDU, and the duration of the excitation field is determined based on the second PPDU.

88. The communication device according to claim 87, characterized in that, The second PPDU contains first information indicating the length of the second PPDU, and the duration of the excitation field is determined based on the first information; and / or, The duration of the excitation field is determined based on the end time of the transmission of the second PPDU.

89. The communication device according to claim 88, characterized in that: The first information is carried in the SIG field, MAC header, and data field of the second PPDU; or, The first information is the synchronization sequence in the second PPDU.

90. The communication device according to any one of claims 87 to 89, characterized in that, Before receiving the first information, the duration of the stimulus field is determined based on predefined information.

91. The communication device according to claim 90, characterized in that, The duration of the incentive field is a predefined maximum duration.

92. The communication device according to claim 74, characterized in that, The excitation field is used by the first device to perform backscatter communication. The duration of the excitation field is determined based on a third PPDU, which is a PPDU transmitted by the first device before receiving the first PPDU.

93. The communication device according to claim 92, characterized in that, The duration of the excitation field is determined based on the PPDU length, data size, or uplink transmission parameters carried in the third PPDU.

94. The communication device according to claim 74, characterized in that, The excitation field is a first excitation field, which is used by the first device to perform backscatter communication. The duration of the first excitation field is determined based on the indication information carried in the second excitation field located before the first excitation field in the first PPDU.

95. The communication device according to claim 94, characterized in that, The second incentive field is used to indicate the size of the uplink transmission parameters and / or uplink data corresponding to the first incentive field.

96. The communication device according to any one of claims 74 to 95, characterized in that, The first PPDU includes a leader, the leader including a first SIG field, the PPDU length field in the first SIG field being used to indicate one of the following: The duration of the first PPDU; Fixed value; Information related to the excitation field in the first PPDU.

97. The communication device according to any one of claims 74 to 96, characterized in that, The first device is an AMP device.

98. A communication device, characterized in that, The communication device is a second device, and the communication device includes: A first transmitting module is configured to transmit at least a portion of the fields in a first PPDU to a first device. The first PPDU includes an excitation field, which is used to power the first device or to enable backscatter communication for the first device.

99. The communication device according to claim 98, characterized in that: The duration of the stimulus field belongs to one or more preset fixed durations; or, The duration of the stimulus field is configured by the second device within a predefined time range.

100. The communication device according to claim 98 or 99, characterized in that, The duration of the stimulus field is determined by the second device based on the feedback information from the first device.

101. The communication device according to claim 100, characterized in that, The feedback information is energy-related information of the first device.

102. The communication device according to claim 101, characterized in that, The energy-related information is used to indicate the energy harvesting efficiency of the first device and / or the remaining energy of the first device.

103. The communication device according to any one of claims 100 to 102, characterized in that, Before the second device receives the feedback information, the duration of the excitation field is configured to a preset fixed value.

104. The communication device according to any one of claims 98 to 103, characterized in that, The first PPDU includes a first field located before the stimulus field, the first field being used to indicate the duration of the stimulus field.

105. The communication device according to claim 104, characterized in that, The first PPDU includes a preamble, and the first field is the first SIG field in the preamble. The first SIG field includes a PPDU length field, which is used to indicate the duration of the excitation field.

106. The communication device according to claim 105, characterized in that, The PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

107. The communication device according to claim 104, characterized in that, The first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields following the first field.

108. The communication device according to claim 107, characterized in that, The first field is either the second SIG field or a data field.

109. The communication device according to claim 107 or 108, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

110. The communication device according to any one of claims 107 to 109, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field. The duration of the plurality of incentive fields is different. The first field indicates a plurality of values, and the plurality of values ​​correspond to the duration of the plurality of incentive fields respectively.

111. The communication device according to claim 98, characterized in that, The excitation field is used by the first device to perform backscatter communication, during which the first device transmits a second PPDU, and the duration of the excitation field is determined based on the second PPDU.

112. The communication device according to claim 111, characterized in that, The second PPDU contains first information indicating the length of the second PPDU, and the duration of the excitation field is determined based on the first information; and / or, The duration of the excitation field is determined based on the end time of the transmission of the second PPDU.

113. The communication device according to claim 112, characterized in that: The first information is carried in the SIG field, MAC header, and data field of the second PPDU; or, The first information is the synchronization sequence in the second PPDU.

114. The communication device according to any one of claims 111 to 113, characterized in that, Before receiving the first information, the duration of the stimulus field is determined based on predefined information.

115. The communication device according to claim 114, characterized in that, Before receiving the first information, the duration of the stimulus field is a predefined maximum duration.

116. The communication device according to claim 98, characterized in that, The excitation field is used by the first device to perform backscatter communication. The duration of the excitation field is determined based on a third PPDU, which is a PPDU transmitted by the first device before receiving the first PPDU.

117. The communication device according to claim 116, characterized in that, The duration of the excitation field is determined based on the PPDU length, data size, or uplink transmission parameters carried in the third PPDU.

118. The communication device according to claim 98, characterized in that, The excitation field is a first excitation field, which is used by the first device to perform backscatter communication. The duration of the first excitation field is determined based on the indication information carried in the second excitation field located before the first excitation field in the first PPDU.

119. The communication device according to claim 118, characterized in that, The second incentive field is used to indicate the size of the uplink transmission parameters and / or uplink data corresponding to the first incentive field.

120. The communication device according to any one of claims 98 to 119, characterized in that, The first PPDU includes a leader, the leader including a first SIG field, the PPDU length field in the first SIG field being used to indicate one of the following: The duration of the first PPDU; Fixed value; Information related to the excitation field in the first PPDU.

121. The communication device according to any one of claims 98 to 120, characterized in that, The first device is an AMP device.

122. A communication device, characterized in that, The communication device is a third device, and the communication device includes: The second transmitting module is used to transmit the excitation field in the first PPDU to the first device. The excitation field is used to power the first device or to enable the first device to perform backscatter communication.

123. The communication device according to claim 122, characterized in that, The communication device also includes: The second receiving module is used to receive the first field of the first PPDU sent by the second device. The first field is located before the excitation field and is used to indicate the duration of the excitation field.

124. The communication device according to claim 123, characterized in that, The first PPDU includes a preamble, and the first field is the first SIG field in the preamble. The first SIG field includes a PPDU length field, which is used to indicate the duration of the excitation field.

125. The communication device according to claim 124, characterized in that, The PPDU length field is used to indicate the duration of the first stimulus field of the first PPDU, or to indicate the duration of all stimulus fields in the first PPDU.

126. The communication device according to claim 123, characterized in that, The first field is located between the leader of the first PPDU and the stimulus field, and the first field is used to indicate the duration of one or more stimulus fields located after the first field.

127. The communication device according to claim 126, characterized in that, The first field is either the second SIG field or a data field.

128. The communication device according to claim 126 or 127, characterized in that, The first field is used to indicate the duration of a plurality of incentive fields following the first field, and the first field is also used to indicate the number of the plurality of incentive fields.

129. The communication device according to any one of claims 126 to 128, characterized in that, The first field is used to indicate multiple incentive fields following the first field, and the duration of the multiple incentive fields is different. The first field indicates multiple values, and the multiple values ​​correspond to the duration of the multiple incentive fields respectively.

130. The communication device according to claim 122, characterized in that, The excitation field is used by the first device to perform backscatter communication, and the duration of the excitation field is determined based on the first information sent by the second device to the third device during the backscatter communication.

131. The communication device according to claim 130, characterized in that, Before receiving the first information, the duration of the excitation field is determined based on predefined information or the configuration information of the second device.

132. The communication device according to claim 131, characterized in that, Before receiving the first information, the duration of the stimulus field is a predefined maximum duration.

133. The communication device according to any one of claims 122 to 132, characterized in that, The first PPDU includes a leader, the leader including a first SIG field, the PPDU length field in the first SIG field being used to indicate one of the following: The duration of the first PPDU; Fixed value; Information related to the excitation field in the first PPDU.

134. The communication device according to any one of claims 122 to 133, characterized in that, The first device is an AMP device.

135. A communication device, characterized in that, The communication device is a first device, and the communication device includes: The third transmitting module is used to send an uplink PPDU to the second device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: The uplink transmission parameters are carried in the uplink PPDU; The uplink transmission parameters are determined based on the configuration information of the second device; The first device sends the uplink PPDU based on fixed uplink transmission parameters configured by the second device.

136. The communication device according to claim 135, characterized in that, The uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the SIG field of the uplink PPDU.

137. The communication device according to claim 135, characterized in that, The uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the MAC header of the uplink PPDU.

138. The communication device according to claim 137, characterized in that, The second device receives the MAC header based on fixed uplink transmission parameters.

139. The communication device according to any one of claims 135 to 138, characterized in that, The uplink transmission parameters include one or more of the following: the length of the PPDU, the MCS, and the data rate.

140. The communication device according to any one of claims 135 to 139, characterized in that, The first device is an AMP device.

141. A communication device, characterized in that, The communication device is a second device, and the communication device includes: The third receiving module is used to receive the uplink PPDU sent by the first device, wherein the uplink transmission parameters of the uplink PPDU satisfy one of the following: The uplink transmission parameters are carried in the uplink PPDU; The uplink transmission parameters are determined based on the configuration information of the second device; The second device receives the uplink PPDU based on fixed uplink transmission parameters configured in the second device.

142. The communication device according to claim 141, characterized in that, The uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the SIG field of the uplink PPDU.

143. The communication device according to claim 141, characterized in that, The uplink transmission parameters are carried in the uplink PPDU, including: the uplink transmission parameters are carried in the MAC header of the uplink PPDU.

144. The communication device according to claim 143, characterized in that, The second device receives the MAC header based on fixed uplink transmission parameters.

145. The communication device according to any one of claims 141 to 144, characterized in that, The uplink transmission parameters include one or more of the following: the length of the PPDU, the MCS, and the data rate.

146. The communication device according to any one of claims 141 to 145, characterized in that, The first device is an AMP device.

147. A communication device, characterized in that, The device includes a memory and a processor, the memory being used to store a program and the processor being used to invoke the program in the memory to cause the communication device to perform the method as described in any one of claims 1 to 24, 25 to 48, 49 to 61, 62 to 67, or 68 to 73.

148. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the device to perform the method as described in any one of claims 1 to 24, 25 to 48, 49 to 61, 62 to 67, or 68 to 73.

149. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1 to 24, 25 to 48, 49 to 61, 62 to 67, or 68 to 73.

150. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method as described in any one of claims 1 to 24, 25 to 48, 49 to 61, 62 to 67, or 68 to 73.

151. A computer program product, characterized in that, Includes a program that causes a computer to perform the method as described in any one of claims 1 to 24, 25 to 48, 49 to 61, 62 to 67, or 68 to 73.

152. A computer program, characterized in that, The computer program causes the computer to perform the method as described in any one of claims 1 to 24, 25 to 48, 49 to 61, 62 to 67, or 68 to 73.

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