Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first device sends a first PPDU, wherein the first PPDU comprises a preamble and / or a PE field, and when the first PPDU is transmitted by using a dRU, a subcarrier occupied by the preamble and / or the PE field satisfies a first rule. On the basis of the first rule, when the first PPDU is transmitted by using the dRU, it can be determined how to transmit the preamble and / or the PE field. Therefore, the present application perfects the working mode of the preamble and / or the PE field when a PPDU is transmitted by using the dRU.

Description

Wireless communication method and communication device

[0001] This application claims priority to the PCT patent application filed with the China Patent Office on November 27, 2023, with application number PCT / CN2023 / 134375 and application name “Wireless Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and more specifically, to a wireless communication method and a communication device. Background Art

[0003] With the development of technology, resource units (RUs) can have not only continuous subcarriers but also discontinuous subcarriers. RUs with continuous subcarriers can be called regular RUs (rRUs). RUs with discontinuous subcarriers can be called distributed RUs (dRUs). Regarding the transmission of some fields in the physical layer protocol data unit (PPDU) in the dRU mode, the relevant technologies have not provided a suitable solution.

[0004] Summary of the Invention

[0005] The present application provides a wireless communication method and a communication device. The following introduces various aspects involved in the present application.

[0006] In a first aspect, a wireless communication method is provided. The method includes: a first device sending a first PPDU; wherein the first PPDU includes a preamble and / or a packet extension (PE) field, and when the first PPDU is transmitted using a dRU, subcarriers occupied by the preamble and / or the PE field meet a first rule.

[0007] In a second aspect, a wireless communication method is provided, comprising: a second device receiving a first PPDU; wherein the first PPDU includes a preamble and / or a PE field, and when the first PPDU is transmitted using a dRU, subcarriers occupied by the preamble and / or the PE field meet a first rule.

[0008] According to a third aspect, a communication device is provided. The communication device is a first device. The communication device includes: a transmitting unit configured to transmit a first PPDU; wherein the first PPDU includes a preamble and / or a PE field, and when the first PPDU is transmitted using a dRU, subcarriers occupied by the preamble and / or the PE field meet a first rule.

[0009] In a fourth aspect, a communication device is provided. The communication device is a second device. The communication device includes: a receiving unit configured to receive a first PPDU; wherein the first PPDU includes a preamble and / or a PE field, and when the first PPDU is transmitted using a dRU, subcarriers occupied by the preamble and / or the PE field meet a first rule.

[0010] In a fifth aspect, a communication device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory to enable the communication device to perform some or all of the steps in the above-mentioned various aspects of the method.

[0011] In a sixth aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned communication device. In another possible design, the system may also include other devices that interact with the communication device in the solution provided in the embodiment of the present application.

[0012] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device to execute part or all of the steps in the methods of the above aspects.

[0013] In an eighth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a communication device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0014] In a ninth aspect, an embodiment of the present application provides a chip comprising a memory and a processor, wherein the processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] Based on the first rule, when the first PPDU is transmitted using a dRU, how the preamble and / or PE field is transmitted can be determined. Therefore, the present application improves the working mode of the preamble and / or PE field when the PPDU is transmitted using a dRU. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0017] FIG. 2A is a diagram illustrating the format of an extremely high throughput (EHT) multi-user (MU) PPDU.

[0018] FIG. 2B is a schematic diagram of the format of an EHT trigger-based (TB) PPDU.

[0019] FIG3 is a diagram showing an example of a scenario using dRU transmission.

[0020] FIG4 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0021] FIG5A is a diagram illustrating an example of an ultra-high reliability (UHR) MU PPDU format.

[0022] FIG5B is a diagram illustrating an example of a UHR TB PPDU format.

[0023] FIG5C is a diagram showing an example of the distribution of a PPDU provided in an embodiment of the present application.

[0024] FIG6 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0025] FIG7 is a schematic structural diagram of another communication device provided in an embodiment of the present application.

[0026] FIG8 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solution in this application will be described below with reference to the accompanying drawings.

[0028] Communication System

[0029] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless local area networks (WLAN), wireless fidelity (WiFi), high performance radio local area networks (HIPELAN), wide area networks (WAN), cellular networks, or other communication systems. For another example, the technical solutions provided in the embodiments of the present application can be applied to communication systems that adopt the 802.11 standard. For example, the 802.11 standard includes but is not limited to the 802.11ax standard, the 802.11be standard, and the next generation 802.11 standard.

[0030] FIG1 is a schematic diagram of a communication system applicable to embodiments of the present application. Referring to FIG1 , the communication devices in the communication system 100 may include access points (APs) 111 and 112, and stations (STAs) 121 and 122. STA 121 may access the network through AP 111, and STA 122 may access the network through AP 112.

[0031] In some implementations, a STA may establish an association with one or more APs, after which the associated STAs and APs may communicate. For example, as shown in FIG1 , AP 111 and STA 121 may communicate after establishing an association, and AP 112 and STA 122 may communicate after establishing an association.

[0032] In some implementations, the communication in the communication system 100 may be communication between an AP and a non-AP STA, communication between a non-AP STA and a non-AP STA, or communication between a STA and a peer STA, where a peer STA may refer to a device that communicates with the STA peer, for example, the peer STA may be an AP or a non-AP STA.

[0033] It should be understood that FIG1 exemplarily shows two AP STAs and two non-AP STAs, and the communication system 100 may also include a larger number of AP STAs, or the communication system 100 may include other numbers of non-AP STAs, which is not limited in the embodiments of the present application.

[0034] In addition, the above communication system can be applied to scenarios of multi-device collaboration, such as multi-AP (multiple access points, Multi-AP) collaboration, or multi-site collaboration.

[0035] In the embodiments of this application, the names of AP and / or STA are not limited. In some scenarios, AP can also be called AP STA, that is, in a sense, AP is also a type of STA. In other scenarios, STA can also be called non-AP STA.

[0036] In some scenarios, the aforementioned communication device may also be a "multi-link device (MLD)," i.e., a device that can communicate via multiple communication links, where the multiple communication links may include communication links in different frequency bands, such as millimeter wave bands and / or low-frequency bands. Generally, if the multi-link device is an AP, the AP may also be referred to as a "multi-link AP." If the multi-link device is a STA, the STA may also be referred to as a "multi-link STA."

[0037] In the embodiments of the present application, an AP may be a device in a wireless network. An AP may be a communication entity such as a communication server, a router, a switch, or a bridge, or the AP device may include various forms of macro base stations, micro base stations, relay stations, etc. Of course, the AP may also be a chip, circuit, or processing system in these various forms of devices, thereby realizing the methods and functions of the embodiments of the present application. The AP device can be applied to a variety of scenarios, such as sensor nodes in smart cities (e.g., smart water meters, smart electricity meters, smart air detection nodes), smart devices in smart homes (e.g., smart cameras, projectors, displays, televisions, speakers, refrigerators, washing machines, etc.), nodes in the Internet of Things, entertainment terminals (e.g., wearable devices such as AR and VR), smart devices in smart offices (e.g., printers, projectors, etc.), Internet of Vehicles devices in the Internet of Vehicles, and some infrastructure in daily life scenarios (e.g., vending machines, self-service navigation counters in supermarkets, self-service checkout devices, self-service ordering machines), etc.

[0038] In some implementations, the role of a STA in a communication system is not absolute; in some scenarios, a STA can function as an AP. For example, when a mobile phone is connected to a router, it can be a non-AP STA, while when it is acting as a hotspot for other phones, it functions as an AP.

[0039] In the embodiments of the present application, a STA device in the embodiments of the present application may be a device with wireless transceiver functions, such as a device that supports the 802.11 series of protocols and can communicate with an AP or other STAs. For example, a STA is any user communication device that allows a user to communicate with an AP and, in turn, with a WLAN. STA devices include, for example, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.

[0040] The STA in the embodiment of the present application may also be a device that provides voice / data connectivity to users, such as a handheld device or vehicle-mounted device with wireless connection function. Examples include: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (PLMNs). The terminal equipment in the network (PLMN), etc., is not limited to this in the embodiments of the present application.

[0041] By way of example and not limitation, in the embodiments of this application, the STA device may also be a wearable device. Wearable devices, also known as wearable smart devices, are a general term for wearable devices that utilize wearable technology to intelligently design and develop wearable devices, such as glasses, gloves, watches, clothing, and shoes. Examples include smart watches or smart glasses, as well as devices that focus on a specific application function and require integration with other devices, such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0042] In addition, in embodiments of the present application, the STA device can also be a terminal device in the Internet of Things (IoT) system. The IoT is an important component of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things. In embodiments of the present application, IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrowband (NB) technology.

[0043] Furthermore, in the embodiments of the present application, the STA device may be a device in a connected vehicle system. The communication methods in a connected vehicle system are collectively referred to as V2X (where X represents everything). For example, V2X communication includes vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-network (V2N) communication.

[0044] In addition, in an embodiment of the present application, the STA device may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (partial terminal devices), receiving control information and downlink data from AP devices, and sending electromagnetic waves to transmit data to AP devices.

[0045] In addition, the AP device in the embodiment of the present application may be a device for communicating with a STA device. The AP device may be a network device in a wireless local area network. The AP device may be used to communicate with the STA device through the wireless local area network.

[0046] From the perspective of the communication standards supported by the AP, in some implementations, the AP can be a device that supports the 802.11be standard. The AP can also be a device that supports various current and future 802.11 family WLAN standards, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0047] From the perspective of STA-supported communication standards, in some implementations, non-AP STAs can support the 802.11be standard. Non-AP STAs can also support various current and future 802.11 family wireless local area network (WLAN) standards, including 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

[0048] In the embodiments of the present application, there is no limitation on the frequency bands supported by WLAN technology. In some implementations, the frequency bands supported by WLAN technology may include, but are not limited to, low frequency bands (e.g., 2.4 GHz, 5 GHz, 6 GHz) and high frequency bands (e.g., 45 GHz, 60 GHz).

[0049] It should be understood that the specific forms of STA devices and AP devices in the embodiments of the present application are not particularly limited and are merely illustrative.

[0050] EHT PPDU

[0051] The following uses EHT PPDU as an example to illustrate the format of PPDU.

[0052] Figure 2A illustrates the format of an EHT MU PPDU. The EHT MU PPDU is used to transmit data to one or more users. The EHT MU PPDU shown in Figure 2A does not respond to a trigger frame. As shown in Figure 2A, the EHT MU PPDU may include: a non-HT short training field (L-STF), a non-HT long training field (L-LTF), a non-HT signal (L-SIG), a repeated non-HT signal (RL-SIG), a universal signal (U-SIG), an EHT-SIG, an EHT-STF, an EHT-LTF, a data field, and a PE field.

[0053] Figure 2B illustrates the format of an EHT TB PPDU. The EHT TB PPDU can be used in response to a trigger frame from an AP. As shown in Figure 2B , the EHT TB PPDU may include: an L-STF field, an L-LTF field, an L-SIG field, an RL-SIG field, an U-SIG field, an EHT-STF field, an EHT-LTF field, a data field, and a PE field.

[0054] As can be seen from Figures 2A and 2B , the EHT-SIG field exists in the EHT MU PPDU, but not in the EHT TB PPDU. The duration of the EHT-STF field in the EHT TB PPDU is twice that of the EHT-STF field in the EHT MU PPDU.

[0055] The L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields may all be referred to as EHT pre-modulated fields. The EHT-STF, EHT-LTF, data, and PE fields may all be referred to as EHT modulated fields.

[0056] In the EHT TB PPDU, the EHT pre-modulation field (including the L-STF, L-LTF, L-SIG, RL-SIG, and U-SIG fields) is transmitted only on the 20 MHz channel where the STA's EHT modulation field exists. If the STA's EHT modulation field occupies more than one 20 MHz channel, the EHT pre-modulation field is replicated on all 20 MHz channels where the EHT modulation field exists.

[0057] When the PPDU bandwidth is greater than 20 MHz, L-STF, L-LTF, L-SIG, RL-SIG, and U-SIG are replicated at 20 MHz.

[0058] The following mainly describes the EHT-STF, EHT-LTF, and PE fields.

[0059] EHT-STF

[0060] The primary purpose of the EHT-STF field is to improve automatic gain control estimation in multiple-input multiple-output (MIMO) transmissions. The EHT-STF field may be located after the EHT-SIG field in an EHT MU PPDU. The EHT-STF field may be located after the U-SIG field in an EHT TB PPDU. The EHT-STF field duration of an EHT MU PPDU may be 4 μs (with a period of 0.8 μs for 5 cycles). The EHT-STF field duration of an EHT TB PPDU may be 8 μs (with a period of 1.6 μs for 5 cycles).

[0061] The frequency domain sequences (hereinafter referred to as sequences) of the EHT-STF in the EHT MU PPDU and the EHT TB PPDU are described below.

[0062] (1) EHT MU PPDU

[0063] For 20 MHz transmission, the frequency domain sequence of the EHT-STF of the EHT MU PPDU can meet the following requirements: Where M = {–1,–1,–1,1,1,1,–1,1,1,–1,1,1,–1,1}. The value of the null subcarrier index 0 is EHTS0 = 0. EHTS a:b:s Indicates the EHT-STF coefficients at every b subcarrier indices from a to c, and the coefficients at other subcarrier indices are set to zero.

[0064] EHTS ―112:16:112 It can indicate that among the subcarrier indices -112 to 112, the coefficients of every 16 subcarrier indices are non-zero, and the coefficients of the other subcarrier indices are 0. That is, the EHT-STF coefficients of the subcarrier indices -112, -96, -80, -64, -48, -32, -16, 0, 16, 32, 48, 64, 80, 96, and 112 are non-zero, and the EHT-STF coefficients of the other subcarrier indices are 0.

[0065] For 40 MHz transmission, the frequency domain sequence of the EHT-STF of the EHT MU PPDU can meet the following requirements:

[0066] For 80 MHz transmission, the frequency domain sequence of the EHT-STF of the EHT MU PPDU can meet the following requirements:

[0067] For 160 MHz transmission, the frequency domain sequence of the EHT-STF of the EHT MU PPDU can meet the following requirements:

[0068] For 320 MHz transmission, the frequency domain sequence of the EHT-STF of the EHT MU PPDU can meet the following requirements:

[0069] (2) EHT TB PPDU

[0070] For 20MHz transmission, the frequency domain sequence of the EHT-STF of the EHT TB PPDU can meet the following requirements:

[0071] For 40MHz transmission, the frequency domain sequence of the EHT-STF of the EHT TB PPDU can meet the following requirements: Among them, the value of the EHT-STF sequence at the edge subcarrier index ±248 is EHTS ±248 =0.

[0072] For 80MHz transmission, the frequency domain sequence of the EHT-STF of the EHT TB PPDU can meet the following requirements: Among them, the value of the EHT-STF sequence at the edge subcarrier index ±504 is EHTS ±504 =0.

[0073] For 160MHz transmission, the frequency domain sequence of the EHT-STF of the EHT TB PPDU can meet the following requirements: Among them, the value of the EHT-STF sequence at the edge subcarrier index ±8 and ±1016 is EHTS ±8 =0,EHTS ±1016 =0.

[0074] For 320MHz transmission, the frequency domain sequence of the EHT-STF of the EHT TB PPDU can meet the following requirements: Among them, the values ​​of the EHT-STF sequence at the edge subcarrier index ±8, ±1016, ±1032 and ±2040 are EHTS ±8 =EHTS ±1016 =EHTS ±1032 =EHTS ±2040 =0.

[0075] For EHT-STF, if a coefficient in the sequence corresponds to an unmodulated subcarrier index in the data field, for example, a subcarrier in an RU to which no user is assigned or a punctured subcarrier in orthogonal frequency division multiple access (OFDMA), the coefficient is set to zero.

[0076] EHT-LTF

[0077] The EHT-LTF field provides a method for the receiver to estimate the MIMO channel between the constellation mapper output and the receive link. An EHT PPDU supports three types of EHT-LTF: 1x EHT-LTF, 2x EHT-LTF, and 4x EHT-LTF. The durations are 3.2μs, 6.4μs, and 12.8μs, respectively.

[0078] In a 20MHz transmission, the 1x EHT-LTF sequence transmitted on subcarrier [-122,122] can meet the following requirements:

[0079] EHTLTF -122,122 ={0,0,-1,0,0,0,+1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,+1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,+1,0,0,0,+1,0,0 ,0,-1,0,0,0,-1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,-1,0,0,0,+1,0,0,0,+1,0,0,0,-1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0, 0,0,0,0,-1,0,0,0,+1,0,0,0,+1,0,0,0,+1,0,0,0,+1,0,0,0,+1,0,0,0,+1,0,0,0,+1,0,0,0,-1,0,0,0,-1,0,0,0,-1,0,0,0,-1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,-1,0 ,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,+1,0,0,0,-1,0,0,0,-1,0,0,0,-1,0,0,0,-1,0,0,0,-1,0,0}.

[0080] In a 20MHz transmission, the 2xEHT-LTF sequence transmitted on subcarrier [-122,122] can meet the following requirements:

[0081] EHTLTF -122,122={-1,0,-1,0,-1,0,+1,0,+1,0,-1,0,+1,0,-1,0,-1,0,-1,0,-1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,+1,0,+1,0,+1,0,-1,0,+1,0,+1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,+ 1,0,+1,0,-1,0,+1,0,-1,0,-1,0,-1,0,-1,0,+1,0,-1,0,+1,0,+1,0,+1,0,-1,0,-1,0,+1,0,0,+1,0,-1,0,+1,0,+1,0,-1,0,+1,0,+1,0,-1,0,+1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,-1,0,+1,0,-1,0,- 1,0,-1,0,-1,0,-1,0,+1,0,-1,0,-1,0,-1,0,+1,0,+1,0,+1,0,-1,0,-1,0,+1,0,+1,0,+1,0,-1,0,+1,0,+1,0,-1,0,+1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,+1,0,-1,0,-1,0,+1,0,-1,0,-1,0,-1,0,-1,0,-1,0,-1,0,-1,0, -1,0,+1,0,-1,0,+1,0,+1,0,-1,0,-1,0,+1,0,+1,0,-1,0,+1,0,-1,0,-1,0,-1,0,-1,0,+1,0,+1,0,-1,0,-1,0,+1,0,+1,0,-1,0,-1,0,+1,0,-1,0,-1,0,+1,0,-1,0,-1,0,-1,0,+1,0,-1,0,-1,0,+1}.

[0082] In a 20MHz transmission, the 4x EHT-LTF sequence transmitted on subcarriers [-122,122] can meet the following requirements:

[0083] EHTLTF -122,122＝{-1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,+1,-1,+1,+1,+1,0,0,0,-1,+1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1、+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1}。

[0084] The above example illustrates the case of transmitting the EHT-LTF sequence at 20MHz. For EHT-LTF sequences in other cases, this application will not go into details. For example, in a 40MHz transmission, 1x EHT-LTF, 2x EHT-LTF, and 4x EHT-LTF sequences are transmitted on subcarriers [-244, 244]; in an 80MHz transmission, 1x EHT-LTF, 2x EHT-LTF, and 4x EHT-LTF sequences are transmitted on subcarriers [-500, 500]; in a 160MHz transmission, 1x EHT-LTF, 2x EHT-LTF, and 4x EHT-LTF sequences are transmitted on subcarriers [-1012, 1012]; in a 320MHz transmission, 1x EHT-LTF, 2x EHT-LTF, and 4x EHT-LTF sequences are transmitted on subcarriers [-2036, 2036]. For details, please refer to the relevant technology and this application will not elaborate on them.

[0085] For example, the EHT-LTF types that can be used by the EHT MU PPDU and the EHT TB PPDU may be shown in the second and fourth columns of Table 1, respectively.

[0086] Table 1

[0087] It should be noted that for EHT-LTF, if during OFDMA transmission, the values ​​in the EHT-LTF sequence can be replaced with zero for subcarriers belonging to RUs that are not allocated or punctured, as well as DC subcarriers or empty subcarriers.

[0088] PE

[0089] The PE field may provide additional receive processing time at the end of the EHT PPDU.

[0090] The PE field may be present in the EHT PPDU with a duration of 0 μs, 4 μs, 8 μs, 12 μs, 16 μs, or 20 μs.

[0091] It should be noted that the use of the PE field with a duration of 20 μs is allowed only when one or more of the following conditions are met: an EHT MU PPDU with at least one participating STA using 4096-QAM modulation; a 320 MHz EHT MU PPDU if the size of one of the allocated RUs or MRUs is greater than 2*996; an EHT TB PPDU.

[0092] A non-AP EHT STA shall support the transmission of EHT TB PPDUs with a PE duration of 20μs and the reception of EHT MU PPDUs with a PE duration of 20μs. If the PE field is present, the PE field shall be transmitted with the same average power as the data field. Apart from this, the content of the PE field is arbitrary. The spectrum used by the PE field shall be commensurate with the location and size of the RU or multiple resource units (MRU) occupied in the data field to minimize power leakage outside the spectrum used by the data field. For example, for a 20MHz OFDMA EHT PPDU, if the RU occupied in the data field is a 106-tone RU, the spectrum width of the PE is approximately 10MHz.

[0093] dRU

[0094] With the development of technology, power spectral density (PSD) limits are becoming increasingly stringent. For example, in the 6 GHz band, for non-AP STAs in the low-power indoor band, the PSD limit is -1 dBm / MHz.

[0095] The rRU has contiguous subcarriers. The transmit power per subcarrier in the rRU is lower. This is because the PSD limit is defined per MHz and per STA, and the subcarriers in the rRU are contiguous. Therefore, there are more subcarriers per MHz, and according to the PSD limit, the transmit power per subcarrier is lower.

[0096] The dRU has discontinuous subcarriers. In the case of the dRU, there are fewer subcarriers per MHz, or even only one subcarrier per MHz. Therefore, the subcarriers in the dRU can be transmitted at a higher power compared to the rRU. For example, for a 52-tone dRU distributed over 80MHz, there can be only one subcarrier per MHz. However, for a 52-tone rRU, there are approximately 13 subcarriers per MHz. In the 6GHz low-power indoor band, the PSD limit is -1dBm / MHz. Therefore, for a 52-tone RU (approximately 4MHz), the maximum transmission power allowed using the rRU is only about 6dBm, while using the dRU can increase the transmission power by 11dB. This significant increase in transmission power can achieve a higher MCS or achieve a longer transmission distance.

[0097] As shown in Figure 3, STA1, STA2, and STA3 can all use dRUs to increase their transmit power. Compared to using rRUs of the same size, all subcarriers receive higher transmit power, significantly improving overall spectral efficiency.

[0098] It should be noted that an MRU can also have discontinuous subcarriers, as well as a dMRU. The pre-dRU-related technical solutions provided in this application can also be applied to dMRUs. For ease of description, the following description uses the dRU as an example. If you need to apply the embodiments described below to a dMRU, replace "dRU" with "dMRU."

[0099] In the case where the PPDU is transmitted using the dRU, the data field can be transmitted using the dRU, and the related art does not propose how to transmit other fields except the data field.

[0100] FIG4 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application to solve the above-mentioned problem.

[0101] The method shown in FIG4 can be performed by a first device and a second device. The first device can include the AP or non-AP STA described above. The second device can include a non-AP STA or an AP.

[0102] The method shown in FIG. 4 may include step S410 .

[0103] In step S410 , the first device may send a first PPDU to the second device.

[0104] The first PPDU may include a preamble and / or a PE field. The preamble may include, for example, one or more of the following fields: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, UHR-SIG, UHR-STF, UHR-LTF.

[0105] In some embodiments, the first PPDU may be transmitted using a dRU. Transmission of the first PPDU using a dRU may mean that a data field of the first PPDU is transmitted using a dRU.

[0106] In some embodiments, the first PPDU may be transmitted using rRU. Transmission of the first PPDU using rRU may mean that a data field of the first PPDU is transmitted using rRU.

[0107] Optionally, the first PPDU may be a trigger-based PPDU. For example, the first PPDU may be a UHR TB PPDU. For example, the first device may include multiple STAs, and the second device may include an AP. The AP may send a trigger frame to the multiple STAs. In response to receiving the trigger frame, the multiple STAs may each send multiple TB PPDUs to the AP. For the AP, the received multiple TB PPDUs may be the first PPDU.

[0108] Optionally, the first PPDU may be a non-trigger-based PPDU, that is, the first PPDU is not a trigger-based PPDU. For example, the first PPDU may be a UHR MU PPDU.

[0109] In the case where the first PPDU is a non-trigger-based PPDU, the use of dRU transmission for the first PPDU may include: the RU indicated by the RU allocation field is a dRU. In the case where the first PPDU is a trigger-based PPDU, the use of dRU transmission for the first PPDU may include: the RU indicated by the RU allocation field in the UHR variant user information (UHR variant user Info) field in the trigger frame, the uplink bandwidth (UL BW) field in the common information (common info) field, and the uplink bandwidth extension (UL BW extension) in the special user information (special user info) field is a dRU.

[0110] In the case where the first PPDU is transmitted using a dRU, the subcarriers occupied by the preamble and / or PE field may satisfy the first rule.

[0111] Based on the first rule, when the first PPDU is transmitted using a dRU, how the preamble and / or PE field is transmitted can be determined. Therefore, the present application improves the working mode of the preamble and / or PE field when the PPDU is transmitted using a dRU.

[0112] Optionally, when the first PPDU is transmitted using rRU, the subcarriers occupied by some or all fields in the preamble code may meet the first rule.

[0113] The first PPDU may be a UHR PPDU. The UHR PPDU may include two formats: a UHR MU PPDU and a UHR TB PPDU. If the UHR PPDU is not a response to a trigger frame, the format of the UHR PPDU may be a UHR MU PPDU. That is, the UHR MU PPDU is a non-trigger-based PPDU. If the UHR PPDU is a response to a trigger frame, the format of the UHR PPDU may be a UHR TB PPDU. That is, the UHR TB PPDU format may be used to respond to the transmission of a trigger frame from the AP, i.e., the UHR TB PPDU is a trigger-based PPDU.

[0114] The UHR MU PPDU format can be used to transmit signals to one or more users. Figure 5A shows an example of a UHR MU PPDU format. As shown in Figure 5A, the UHR MU PPDU may include an L-STF field, an L-LTF field, an L-SIG field, an RL-SIG field, a U-SIG field, a UHR-SIG field, a UHR-STF field, a UHR-LTF field, a data field, and a PE field.

[0115] As shown in Figure 5A, in a UHR MU PPDU, the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and UHR-SIG fields may be referred to as UHR pre-UHR modulated fields. The UHR-STF, UHR-LTF, data, and PE fields may be referred to as UHR modulated fields.

[0116] Figure 5B is an example diagram of a UHR TB PPDU format. As shown in Figure 5B, a UHR TB PPDU may include: an L-STF field, an L-LTF field, an L-SIG field, an RL-SIG field, a U-SIG field, a UHR-STF field, a UHR-LTF field, data, and a PE field.

[0117] As shown in Figure 5B, in the UHR TB PPDU, the L-STF, L-LTF, L-SIG, RL-SIG, and U-SIG fields may be referred to as UHR premodulation fields. The UHR-STF, UHR-LTF, data, and PE fields are referred to as UHR modulation fields.

[0118] For UHR PPDUs, each UHR-LTF symbol and each data symbol can have the same GI duration, which can be 0.8μs, 1.6μs, or 3.2μs, respectively. The UHR-LTF field can include three types: 1x UHR-LTF, 2x UHR-LTF, and 4x UHR-LTF. The GI-free duration of each 1x UHR-LTF, 2x UHR-LTF, or 4x UHR-LTF symbol can be 3.2μs, 6.4μs, or 12.8μs, respectively. Data symbols without a GI have a duration of 12.8μs.

[0119] It should be noted that the above-mentioned UHR PPDU format is only an example. The format of the UHR PPDU may be different from that in Figures 5A and 5B. In addition, the first PPDU may also be other types of PPDUs, which are not limited in this application.

[0120] The first rule is described in detail below.

[0121] In some embodiments, the preamble may include a premodulation field. The premodulation field may, for example, include the UHR premodulation field described above. For example, if the first PPDU is a UHR MU PPDU, the premodulation field may include one or more of the following fields: L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and UHR-SIG. For another example, if the first PPDU is a UHR TB PPDU, the premodulation field may include one or more of the following fields: L-STF, L-LTF, L-SIG, RL-SIG, and U-SIG.

[0122] The first rule may include: the premodulation field is transmitted using consecutive subcarriers. The method of using consecutive subcarriers for transmission may be a transmission method specified in the relevant technology. For example, the premodulation field may be transmitted using the transmission method defined in IEEE 802.11be.

[0123] In some embodiments, the premodulation field may be transmitted over a first bandwidth. The first bandwidth may be a bandwidth of a subcarrier distribution used by the modulation field. The modulation field may include one or more of a data field, a UHR-STF, and a UHR-LTF.

[0124] In some embodiments, since the first PPDU is transmitted using a dRU, the bandwidth of the subcarrier distribution used by the modulation field is the bandwidth including the dRU. Based on this, the first bandwidth can also be referred to as the bandwidth including the dRU.

[0125] The first bandwidth may occupy one or more 20 MHz channels. If the first bandwidth occupies multiple 20 MHz channels, the premodulation field may be replicated across the first bandwidth. For example, the premodulation field may be replicated across all 20 MHz channels where the modulation field appears. For example, the premodulation field may be replicated across non-punctured 20 MHz channels.

[0126] Optionally, when the premodulation field includes one or more of L-STF, L-LTF, L-SIG, and RL-SIG, the premodulation field may be replicated across multiple 20 MHz channels of the first bandwidth. That is, one or more of L-STF, L-LTF, L-SIG, and RL-SIG may be replicated across multiple 20 MHz channels of the first bandwidth.

[0127] Optionally, when the premodulation field is a U-SIG field, the first bandwidth is less than or equal to the second bandwidth, and the first bandwidth occupies multiple 20 MHz channels, the premodulation field may be replicated across multiple 20 MHz channels. That is, when the first bandwidth is small (less than or equal to the second bandwidth), the U-SIG field may be replicated across multiple 20 MHz channels of the first bandwidth. The second bandwidth may be a positive number. Exemplarily, the second bandwidth may be 80 MHz. This is illustrated below using Examples 1 and 2.

[0128] For example 1, when the bandwidth of the dRU used by the STA's data field is 40 MHz, the U-SIG field may be replicated on each 20 MHz sub-channel in the 40 MHz.

[0129] Example 2: When the bandwidth of the DRU used by the STA's data field is 80 MHz, the U-SIG field may be replicated on each non-punctured 20 MHz sub-channel in the 80 MHz.

[0130] Optionally, the first bandwidth may occupy one or more subblocks (also referred to as frequency subblocks), wherein the one or more subblocks may include a first subblock. The first subblock may include multiple 20 MHz channels. In the case where the premodulation field is a U-SIG field, the premodulation field may be replicated on some or all of the 20 MHz channels in the first subblock. For example, the U-SIG field may be replicated on the 20 MHz channels in a given subblock.

[0131] In some embodiments, the U-SIG field may be replicated on non-punctured 20 MHz channels in the first sub-block. For example, if the first sub-block does not include a punctured 20 MHz channel (i.e., the first sub-block includes only non-punctured 20 MHz channels), the U-SIG field may be replicated on all 20 MHz channels in the first sub-block. For another example, if the first sub-block includes a punctured 20 MHz channel, the U-SIG field may be replicated on some of the 20 MHz channels in the first sub-block. The some of the 20 MHz channels are non-punctured 20 MHz channels.

[0132] Optionally, the bandwidth of the first sub-block may be 80 MHz. Based on this, the first bandwidth may include one or more 80 MHz sub-blocks. For example, when the first bandwidth is 160 MHz, the first bandwidth may include two 80 MHz sub-blocks. For another example, when the first bandwidth is 320 MHz, the first bandwidth may include four 80 MHz sub-blocks.

[0133] The following takes the bandwidth of the first sub-block as 80 MHz as an example, and combines Example 3 and Example 4 to illustrate the content of the U-SIG field.

[0134] Example 3: When the bandwidth distributed by the DRU used by the STA's data field is 160 MHz, the U-SIG field is replicated on each non-punctured 20 MHz sub-channel in each given 80 MHz frequency sub-block.

[0135] Example 4: When the bandwidth distributed by the DRU used by the STA's data field is 320 MHz, the U-SIG field is replicated on each non-punctured 20 MHz sub-channel in each given 80 MHz frequency sub-block.

[0136] The content of the U-SIG field may differ in different sub-blocks. For example, the multiple sub-blocks may include a first sub-block and a second sub-block, and the content of the U-SIG field in the first sub-block may differ from the content of the U-SIG field in the second sub-block. For example, for Example 3 or Example 4, the content of the U-SIG field in different 80 MHz frequency sub-blocks may differ.

[0137] Considering that the contents of the U-SIG fields of different sub-blocks may be different, the receiving device of the first PPDU (ie, the second device) needs to parse all sub-blocks to correctly parse the corresponding U-SIG fields.

[0138] The difference in the content of the U-SIG field in different sub-blocks may be due to RU adaptation. For ease of understanding, RU adaptation is described below.

[0139] RU adaptation technology can be applied in trigger-based transmission. In this case, RU adaptation can be called trigger-based RU adaptation transmission.

[0140] In triggered RU adaptive transmission, if the AP allocates a special large-size RU or large-size MRU to the STA, for example, the size of the RU or MRU is greater than or equal to 996-tone, the STA can perform a clear channel assessment (CCA) on the channel occupied by the RU or MRU allocated to it (including multiple 20MHz channels). If there are one or more 20MHz channels in a busy state, the STA can adaptively adjust the RU or MRU allocated to it. For example, reduce its size to a child RU / MRU of the RU or MRU. The size of the child RU / MRU is smaller than the size of the RU / MRU before RU adaptation.

[0141] Based on this, if the first sub-block is RU-adapted and the second sub-block is not RU-adapted, the content of the U-SIG field in the first sub-block will be different from the content of the U-SIG field in the second sub-block.

[0142] In some embodiments, the first PPDU may include first indication information. The first indication information may be used to indicate whether the premodulation field replicated on the 20 MHz channel has undergone RU adaptation; or the first indication information may be used to indicate that the RU / MRU transmitting the first PPDU has changed and the RU / MRU size has become smaller; or the first indication information may be used to indicate that the premodulation field replicated in different sub-blocks may be different. Optionally, if the first PPDU is a TB PPDU, the first PPDU may include the first indication information.

[0143] Based on the first indication information, the receiving device of the first PPDU (i.e., the second device) may perform a corresponding operation. For example, if the first indication information indicates whether the premodulation field has been RU-adapted, the receiving device needs to parse all sub-blocks to correctly parse the corresponding U-SIG field. If the first indication information indicates that the premodulation field has not been RU-adapted, the receiving device may parse the U-SIG field of some sub-blocks, and the content of the U-SIG field in other sub-blocks that have not been parsed may be the same as the content of the U-SIG field in the parsed sub-block.

[0144] Optionally, the first indication information may be indicated by an RU adaptation enable field. The RU adaptation enable field may occupy 1 bit. For example, a value of 1 in the RU adaptation enable field may indicate that the PPDU has been RU adapted, and a value of 0 in the RU adaptation enable field may indicate that the PPDU has not been RU adapted. For another example, a value of 0 in the RU adaptation enable field may indicate that the PPDU has been RU adapted, and a value of 1 in the RU adaptation enable field may indicate that the PPDU has not been RU adapted.

[0145] Optionally, the first indication information may be carried in the U-SIG field. That is, the first indication information may be indicated by a subfield of the U-SIG field, or the RU adaptation enable field may be included in the U-SIG field. For example, the U-SIG field may include two parts, namely the U-SIG-1 field and the U-SIG-2 field. The first indication information may be carried in the U-SIG-1 field and / or the U-SIG-2 field. For example, one of B20–B25 in U-SIG-1, B2 in U-SIG-2, and B11–B15 in the TB PPDU may be used to indicate the first indication information. Table 2 shows the case where the RU adaptation enable field is B2 in the U-SIG-2 field.

[0146] Table 2

[0147] For ease of understanding, the following description is given with reference to the example shown in FIG5C .

[0148] In FIG5C , the AP requests TB PPDUs from STA 1 and STA 2 respectively, allocates 996-tone RU 1 and 996-tone RU 2 to STA 1 and STA 2 respectively, and allows STAs (including STA 1 and STA 2) to perform RU adaptation.

[0149] After receiving the trigger frame, STA 1 and STA 2 perform CCA on the 80 MHz sub-blocks containing 996-tone RU 1 and 996-tone RU 2, respectively. The CCA results for STA 1 and STA 2 are as follows.

[0150] STA 1's CCA result shows that the first 20 MHz subchannel in its allocated 996-tone RU 1 is busy. STA 1 adaptively adjusts the 996-tone RU to a child MRU. The child MRU is a 484+242-tone MRU. STA 1 also sets the RU Adaptation Enable subfield in the U-SIG field of the preamble in its TB PPDU to 0, indicating that the TB PPDU has been RU-adapted (i.e., RU adaptation is enabled).

[0151] The CCA result of STA 2 is: the four 20MHz sub-channels where the 996-tone RU 2 allocated to it is located are all idle, so it does not adaptively adjust the RU, and sets the RU adaptation enable subfield of the U-SIG field of the preamble code in its TB PPDU to a value of 1, indicating that the TB PPDU has not been RU adapted (i.e., RU adaptation is disabled).

[0152] As shown in Figure 5C of the rRU, in the 160MHz TB PPDU received by the AP, the U-SIG content in each 80MHz sub-block is different.

[0153] In some embodiments, when there are unmodulated subcarriers in the data field of the first PPDU, the coefficients of the unmodulated subcarriers in the frequency domain sequence of some or all fields in the preamble are 0. Exemplarily, the unmodulated subcarriers in the data field of the first PPDU may include one or more of the following subcarriers: subcarriers belonging to unassigned dRUs, null subcarriers, punctured subcarriers, and direct current (DC) subcarriers.

[0154] Part or all of the fields of the unmodulated subcarrier in the preamble code may include, for example, the first field and / or the second field described below.

[0155] In some embodiments, the preamble may include a first field and / or a second field. The first field may be related to automatic gain control estimation in MIMO transmission. For example, the first field may include a UHR-STF. The second field may be related to MIMO channel estimation. For example, the second field may include a UHR-LTF.

[0156] In the case of a dRU, the frequency domain sequence of the first field may be a first sequence. In the case of a dRU, the frequency domain sequence of the second field may be a second sequence. The first sequence and / or the second sequence may satisfy the first rule. First, the first rule related to the first sequence is described using Examples 1 to 3.

[0157] Example 1

[0158] In some implementations, the first rule may include: the first sequence may be determined based on a frequency domain sequence of the first field when the first PPDU is transmitted using an rRU.

[0159] For example, the first sequence can be the frequency domain sequence of the first field when the first PPDU is transmitted using an rRU. That is, the frequency domain sequence of the first field under the dRU can be consistent with the frequency domain sequence of the first field under the rRU. This implementation method can reuse the frequency domain sequence of the first field in related technologies. Therefore, the complexity is low and the implementation is easy.

[0160] In some implementations, the first rule may include: the first sequence may be determined based on the frequency domain sequence of the first field in the related art. For example, when the first sequence is the frequency domain sequence of the UHR-STF under the dRU, the first sequence may be the same as the EHT-STF sequence. The EHT-STF sequence may refer to the above description.

[0161] For example, when a UHR MU PPDU is transmitted using a dRU, the UHR-STF sequence definitions of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz can be the same as the EHT-STF sequences of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz used by the EHT MU PPDU (e.g., defined by IEEE 802.11be). For another example, when a UHR TB PPDU is transmitted using a dRU, the UHR-STF sequence definitions of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz can be the same as the EHT-STF sequences of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz used by the EHT TB PPDU (e.g., defined by IEEE 802.11be).

[0162] In some embodiments, the first sequence and the subcarrier planning (tone plan) of the dRU may satisfy a first rule. The first rule may include: each dRU in the subcarrier planning includes one or more subcarrier indices with non-zero coefficients in the first sequence. It is understood that when designing the subcarrier planning of the dRU, it may be considered that each dRU contains at least one subcarrier index with a non-zero coefficient in the first sequence.

[0163] For example, subcarrier planning may include: the subcarriers included in the dRU may be distributed in a manner that is spaced apart by M subcarriers, where M is a positive integer. For another example, the distribution method of "the subcarriers included in the dRU may be distributed in a manner that is spaced apart by M subcarriers" may be adjusted to satisfy "each dRU in the subcarrier planning includes one or more subcarrier indices with non-zero coefficients in the first sequence."

[0164] The following describes possible subcarrier planning solutions provided by embodiments of the present application.

[0165] In some embodiments, the subcarrier planning design of a DRU can be as follows: using a 26-tone rRU as the base RU, M subcarriers are distributed at 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz to form a 26-tone dRU. M can be a positive integer. A 52-tone dRU can be composed of two 26-tone dRUs. A 106-tone dRU can be composed of four 26-tone dRUs and two subcarriers. A 242-tone dRU can be composed of nine 26-tone dRUs and eight subcarriers. A 484-tone dRU can be composed of 18 26-tone dRUs and 16 subcarriers. A 996-tone dRU can be composed of 37 26-tone dRUs and 34 subcarriers. A 2*996-tone dRU can be composed of 74 26-tone dRUs and 68 subcarriers.

[0166] For example, within a 20 MHz bandwidth, if the subcarrier indexes of 26-tone rRU 1 are [-121:-96], then after distributed mapping every 9 subcarriers, the subcarrier indexes of 26-tone dRU 1 can be [-121, -112, -103, -94, -85, -76, -66, -57, -48, -39, -30, -21, -12, 4, 13, 22, 31, 40, 49, 58, 67, 77, 86, 95, 104, 113]. [x1:y1] represents the set of subcarriers with index k satisfying x1 ≤ k ≤ y1. [x1:y1, x2:y2] represents the set of subcarriers with index k satisfying x1 ≤ k ≤ y1 or x2 ≤ k ≤ y2.

[0167] Optionally, the subcarrier indices with non-zero coefficients in rRU and the subcarrier indices with non-zero coefficients in dRU of 26-tone RU 4 to 26-tone RU 6 may be as shown in Table 3.

[0168] Table 3

[0169] Optionally, considering the requirement of the first rule that each dRU in the subcarrier planning includes one or more subcarrier indices with non-zero coefficients in the first sequence, Table 3 can be adjusted to Table 4.

[0170] Table 4

[0171] The underlined subcarrier indices in Table 3 can be adjusted to the underlined subcarrier indices in Table 4. As shown in Table 4, the interval of the adjusted non-zero subcarrier indices is no longer 9. Specifically, the interval of the subcarrier indices adjacent to the 15th subcarrier (indexed as "17") in dRU 4, the 12th subcarrier (indexed as "-16") in dRU 5, the 15th subcarrier (indexed as "16") in dRU 5, and the 12th subcarrier (indexed as "-17") in dRU 6 is no longer 9.

[0172] For ease of understanding, Example 1 is described in detail below using Example 1.1, taking 20 MHz UHR MU PPDU as an example.

[0173] Example 1.1

[0174] For a 20 MHz UHR MU PPDU using dRU transmission, the UHR-STF sequence is as described above for the 20 MHz UHR MU PPDU in the "EHT-STF" section. For example, the 26-tone rRU and 26-tone dRU indexes in a 20 MHz UHR MU PPDU may be as shown in Table 5.

[0175] For example, the AP sends a 20 MHz UHR MU PPDU with 8 STAs, which are allocated dRUs 1 to 4 and dRUs 6 to 8. Since dRU 5 is not allocated, the values ​​(or coefficients) of subcarrier indices -16 and 16 in the UHR-STF are set to 0.

[0176] Table 5

[0177] Example 2

[0178] In some implementations, when the first PPDU is a non-trigger-based PPDU or a triggered PPDU, the first rule may include: determining the first sequence based on a frequency-domain sequence of a first field of the triggered PPDU when the triggered PPDU is transmitted using an rRU. In other words, regardless of whether the first PPDU is a triggered PPDU, the first sequence may be determined based on a frequency-domain sequence of the first field of the triggered PPDU when the triggered PPDU is transmitted using an rRU.

[0179] The frequency domain sequence of the first field of a triggered PPDU is typically longer than the frequency domain sequence of the first field of a non-triggered PPDU, i.e., there are more subcarriers with non-zero coefficients. Therefore, the first rule in Example 2 can cause the dRU to contain more non-zero subcarrier indices, or cause each dRU to contain non-zero subcarrier indices. Moreover, this solution can reuse related technologies, so the implementation complexity is low. In addition, the first sequence can be ignored when designing the subcarrier planning of the dRU, so subcarrier planning is simpler.

[0180] Non-trigger-based PPDUs may include UHR MU PPDUs. Trigger-based PPDUs may include UHR TB PPDUs and EHT TB PPDUs.

[0181] For example, when UHR MU PPDU or UHR TB PPDU is transmitted using dRU, the UHR-STF sequence definitions of 20MHz, 40MHz, 80MHz, 160MHz, and 320MHz can be determined according to the EHT-STF sequences of 20MHz, 40MHz, 80MHz, 160MHz, and 320MHz used by EHT TB PPDU, respectively.

[0182] As can be seen above, the EHT-STF sequence of the EHT TB PPDU is longer than the EHT-STF sequence of the EHT MU PPDU, that is, it contains more subcarriers with non-zero coefficients. Therefore, the first rule in Example 2 can cause more subcarrier indices with non-zero coefficients in the EHT-STF sequence to overlap with the dRU subcarrier indices. For example, each dRU can include subcarriers with non-zero subcarrier indices.

[0183] For ease of understanding, Example 2 is described in detail below using Example 2.1, taking 20 MHz UHR MU PPDU as an example.

[0184] Example 2.1

[0185] For a 20 MHz UHR TB PPDU or UHR MU PPDU using dRU transmission, the UHR-STF sequence is as described above for the 20 MHz UHR TB PPDU in the "EHT-STF" section. The 26-tone rRU and 26-tone dRU indexes in the 20 MHz UHR TB PPDU can be as shown in Table 6.

[0186] For example, if the AP requests a 20MHz UHR TB PPDU, there are 9 STAs, which are allocated dRUs 1 to dRU 9. When each STA transmits a UHR TB PPDU, it only sends the UHR-STF on the index of the subcarrier in its allocated dRU.

[0187] Table 6

[0188] Example 3

[0189] In embodiment 3, a new first sequence may be defined. For example, the first sequence may be designed based on the subcarrier planning of the dRU.

[0190] Optionally, the first rule may include: in the first sequence, the coefficient of every N subcarrier index is non-zero. Wherein, N is less than or equal to the first threshold, and both N and the first threshold are positive integers. That is, for the case of dRU, in the first sequence, the interval of the subcarrier index with non-zero coefficients can be smaller (less than the first threshold). That is, the number of subcarriers with non-zero coefficients in the first sequence is as large as possible. Therefore, the first rule in Example 3 can enable the dRU to include more non-zero subcarrier indices to avoid not including subcarriers with non-zero indexes in the dRU.

[0191] As a possible implementation, the first threshold may be less than or equal to 4. Taking the first threshold being 4 as an example, N may be 4, that is, in the first sequence, the coefficients of every N subcarrier indexes may be non-zero.

[0192] For example, when a 20 MHz UHR TB PPDU or a 20 MHz UHR MU PPDU is transmitted using a dRU, the UHR-STF sequence may satisfy: Wherein, M may satisfy: M = {–1,–1,–1,1,1,1,–1,1,1,1,–1,1,1,–1,1}. The value of the null subcarrier index 0 is UHRS0 = 0.

[0193] It should be noted that for Examples 1 to 3 described above, the first sequence may be a frequency domain sequence obtained by phase rotation. Phase rotation may, for example, include multiplying the frequency domain sequence by +1, -1, +j, or -j. Phase rotation can achieve a lower peak-to-average power ratio (PAPR) of the frequency domain sequence in dRU mode.

[0194] The first rule related to the first sequence is described above through Examples 1 to 3. The first rule related to the second sequence is described below through Example 4.

[0195] Example 4

[0196] In some implementations, the second sequence may be determined based on a frequency domain sequence of the second field when the first PPDU is transmitted using an rRU.

[0197] As a possible implementation, the second sequence can be the frequency domain sequence of the second field when the first PPDU is transmitted using an rRU. That is, the second field under the dRU can be consistent with the frequency domain sequence of the second field under the rRU. This implementation can reuse the frequency domain sequence in related technologies, thus reducing complexity and facilitating implementation.

[0198] In some implementations, the first rule may include: the second sequence may be determined based on the frequency domain sequence of the second field in the related art. For example, when the second sequence is UHR-LTF, in the dRU, the second sequence may be the same as the EHT-LTF sequence. The EHT-LTF sequence may refer to the above description.

[0199] For example, when the UHR PPDU is transmitted using dRU, the UHR-LTF sequence definitions of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz can be the same as the EHT-LTF sequences of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz used by the EHT PPDU, respectively.

[0200] For example, when the UHR PPDU is transmitted using the dRU, the UHR-STF sequence definition may be the same as at least one of the following: 1x EHT-LTF, 2x EHT-LTF, and 4x EHT-LTF.

[0201] For example, when a UHR PPDU is transmitted using a dRU, only 4x EHT-LTF or 2x EHT-LTF can be used. The frequency domain sequence of the second field of 4x EHT-LTF or 2x EHT-LTF is longer than that of the second field of 1x EHT-LTF, that is, there are more subcarriers with non-zero coefficients. Therefore, this implementation method can include more non-zero subcarrier indices in the dRU.

[0202] As another possible implementation, the second sequence may be a frequency domain sequence obtained by performing a phase rotation on the frequency domain sequence of the second field when the first PPDU is transmitted using the rRU. The phase rotation may include, for example, multiplying the frequency domain sequence by +1, -1, +j, or -j.

[0203] For example, when the UHR PPDU is transmitted using the dRU, the UHR-LTF sequence definitions of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz can be obtained by phase rotating the EHT-LTF sequences of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz used by the EHT PPDU, respectively.

[0204] For ease of understanding, Example 4 is described in detail below using Example 4.1, taking 20 MHz UHR TB PPDU as an example.

[0205] Example 4.1

[0206] For 20 MHz UHR TB PPDUs using dRU transmission, the UHR-LTF sequence is as described above for the 20 MHz UHR TB PPDU in the "EHT-LTF" section. The 26-tone rRU and 26-tone dRU indexes in the 20 MHz UHR TB PPDU are shown in Table 7.

[0207] If the AP requests a 20MHz UHR TB PPDU, there are 8 STAs, assigned dRUs 1 to 4 and dRUs 6 to 9. For each STA, when transmitting a UHR TB PPDU, the UHR-STF is sent only on the subcarrier indices within the dRU assigned to the STA, as shown in the last column of Table 7. dRU 5 is an unassigned dRU, so the values ​​(or coefficients) at subcarrier indices -108, -72, -44, -8, 8, 44, 72, and 108 in the UHR-LTF are set to 0.

[0208] Table 7

[0209] It should be noted that Examples 1 to 4 can be implemented individually or in combination, and this application does not impose any restrictions on this.

[0210] The first rule related to the PE field is described below.

[0211] In some embodiments, the first rule may include: the PE field is transmitted on the dRU occupied by the data field of the first PPDU. For example, the first device transmits the PE field on the dRU or dMRU occupied by the data field.

[0212] In some implementations, the first rule may include: the frequency spectrum of the PE field may be the same as the position of the subcarrier in the dRU or dMRU occupied by the data field; and / or, the frequency domain of the PE field is the same as the size of the dRU or dMRU occupied by the data field.

[0213] In some implementations, the first rule may include that the transmission power of the PE field may be determined based on the average transmission power of the data field. For example, the PE field may be transmitted using the same average power as the data field.

[0214] The following uses a 20 MHz UHR TB PPDU as an example. If the AP requests transmission of a 20 MHz UHR TB PPDU, there are eight STAs, each assigned 26-tone dRUs 1 through 4 and 6 through 9. Each STA can send the PE field in its assigned dRU when transmitting the UHR TB PPDU.

[0215] In some embodiments, the indication field may be used to indicate whether the first PPDU is transmitted using a dRU. Alternatively, the indication field may be used to indicate the type of RU of the first PPDU. RU types may include rRU and dRU. Therefore, the indication field may also be referred to as the "RU type" field.

[0216] Optionally, the indication field may include, for example, a first indication field. The first PPDU may include the first indication field. The first indication field may be used to indicate whether the current PPDU (ie, the first PPDU) is transmitted using a dRU.

[0217] In some implementations, the first indication field may be 1 bit. For example, a value of 0 in the first indication field may indicate that the first PPDU is transmitted using rRU or rMRU; or that the RU indicated by the RU allocation field is an rRU or rMRU. For another example, a value of 1 in the first indication field may indicate that the first PPDU is transmitted using rRU or rMRU; or that the RU indicated by the RU allocation field is an rRU or rMRU. For another example, a value of 0 in the first indication field may indicate that the first PPDU is transmitted using dRU or dMRU; or that the RU indicated by the RU allocation field is a dRU or dMRU. For another example, a value of 1 in the first indication field may indicate that the first PPDU is transmitted using dRU or dMRU; or that the RU indicated by the RU allocation field is a dRU or dMRU.

[0218] The first indication field may belong to one or more of the following fields: U-SIG field, UHR-SIG field.

[0219] Optionally, the indication field may include a second indication field. The second indication field may be located in the trigger frame corresponding to the first PPDU. That is, the second indication field may be used to indicate whether the PPDU triggered by the current trigger frame (i.e., the first PPDU) is transmitted via the dRU.

[0220] In some implementations, the second indication field may be 1 bit. For example, a value of 0 in the second indication field may indicate that the first PPDU is transmitted using an rRU or rMRU; or that the RU indicated by the RU allocation subfield in the UHR Variant User Info field, the UL BW subfield in the Common Info field, and the UL BW Extension subfield in the Special User Info field is a rRU or rMRU. For another example, a value of 1 in the second indication field may indicate that the first PPDU is transmitted using an rRU or rMRU; or that the RU allocation subfield in the UHR Variant User Info field, the UL BW subfield in the Common Info field, and the UL BW Extension subfield in the Special User Info field are a rRU or rMRU. For another example, a value of 0 in the second indication field may indicate that the first PPDU is transmitted using a dRU or dMRU; or that the RU allocation subfield in the UHR Variant User Info field, the UL BW subfield in the Common Info field, and the UL BW Extension subfield in the Special User Info field are a dRU or dMRU. For example, the value of the second indication field is 1, which may indicate that the first PPDU is transmitted using dRU or dMRU; or it may indicate that the RU jointly indicated by the RU allocation subfield in the UHR variant User Info field, the UL BW subfield in the Common Info field, and the UL BW Extension subfield in the Special User Info field is dRU or dMRU.

[0221] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0222] FIG6 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application. The communication device 600 may include a sending unit 610 .

[0223] The sending unit 610 is used to send a first PPDU; wherein the first PPDU includes a preamble code and / or a PE field. When the first PPDU is transmitted using a dRU, the subcarriers occupied by the preamble code and / or the PE field meet the first rule.

[0224] In an optional embodiment, the sending unit 610 may be a transceiver 830. The communication device 600 may further include a processor 810 and a memory 820, as specifically shown in FIG8 .

[0225] FIG7 is a schematic structural diagram of a communication device 700 provided in an embodiment of the present application. The communication device 700 may include a receiving unit 710 .

[0226] The receiving unit 710 is used to receive a first PPDU; wherein the first PPDU includes a preamble code and / or a PE field. When the first PPDU is transmitted using a dRU, the subcarriers occupied by the preamble code and / or the PE field meet the first rule.

[0227] In an optional embodiment, the receiving unit 710 may be a transceiver 830. The communication device 700 may further include a processor 810 and a memory 820, as specifically shown in FIG8 .

[0228] FIG8 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in FIG8 indicate that the unit or module is optional. The device 800 can be used to implement the method described in the above method embodiment. The device 800 can be a chip or a communication device.

[0229] The device 800 may include one or more processors 810. The processor 810 may support the device 800 to implement the method described in the method embodiment above. The processor 810 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 another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0230] The apparatus 800 may further include one or more memories 820. The memories 820 store programs that can be executed by the processor 810, causing the processor 810 to perform the methods described in the above method embodiments. The memories 820 may be independent of the processor 810 or integrated into the processor 810.

[0231] The apparatus 800 may further include a transceiver 830. The processor 810 may communicate with other devices or chips via the transceiver 830. For example, the processor 810 may transmit and receive data with other devices or chips via the transceiver 830.

[0232] The present invention also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the communication device provided in the present invention, and the program enables a computer to execute the method performed by the communication device in each embodiment of the present invention.

[0233] The present 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 the present application, and the program causes a computer to execute the method performed by the communication device in each embodiment of the present application.

[0234] The embodiments of the present application also provide a computer program. The computer program can be applied to the communication device provided in the embodiments of the present application, and the computer program enables a computer to execute the method executed by the communication device in each embodiment of the present application.

[0235] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0236] In the embodiments of the present application, a "field" may also be referred to as a "field," a "subfield," or a "subfield." A field may occupy one or more bytes (byte / octet), or a field may occupy one or more bits (bit).

[0237] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0238] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0239] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0240] In the embodiments of the present application, "pre-defined" or "pre-configured" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in devices (e.g., including APs and STAs). The present application does not limit the specific implementation method. For example, pre-defined may refer to information defined in a protocol.

[0241] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0242] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0243] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean 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 the present application.

[0244] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication field, for example, it may include a WiFi protocol and related protocols used in future WiFi communication systems, and the present application does not limit this.

[0245] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0246] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0247] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0248] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part 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, the process or function described in the embodiment of the present application is generated in whole or in part. 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 computer-readable storage medium. 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 a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0249] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The first device sends a first physical layer protocol data unit PPDU; The first PPDU includes a preamble code and / or a packet extension PE field. When the first PPDU is transmitted using a distributed resource unit dRU, the subcarriers occupied by the preamble code and / or the PE field meet the first rule.

2. The method according to claim 1, characterized in that The preamble code includes a premodulation field, and the first rule includes: the premodulation field is transmitted using continuous subcarriers.

3. The method according to claim 2, characterized in that The premodulation field is transmitted on a first bandwidth, where the first bandwidth is a bandwidth of subcarrier distribution used by a data field of the first PPDU.

4. The method according to claim 3, characterized in that: In the case where the first bandwidth occupies a plurality of 20 MHz channels, the premodulation field is replicated on the plurality of 20 MHz channels.

5. The method according to claim 4, characterized in that The premodulation field is a U-SIG field. When the first bandwidth is less than or equal to the second bandwidth and the first bandwidth occupies multiple 20 MHz channels, the premodulation field is replicated on the multiple 20 MHz channels.

6. The method according to claim 5, characterized in that The second bandwidth is 80 MHz.

7. The method according to claim 3, characterized in that The premodulation field is a U-SIG field, the first bandwidth occupies multiple sub-blocks, the multiple sub-blocks include a first sub-block, the first sub-block includes multiple 20MHz channels, and the premodulation field is replicated on part or all of the 20MHz channels in the first sub-block.

8. The method according to claim 7, characterized in that The premodulation field is replicated on a non-punctured 20 MHz channel in the first sub-block.

9. The method according to claim 7 or 8, characterized in that: The first PPDU includes first indication information, where the first indication information is used to indicate whether the premodulation field copied on the 20 MHz channel is RU-adapted.

10. The method according to any one of claims 7 to 9, characterized in that: The plurality of sub-blocks further include a second sub-block, and content of a U-SIG field of the first sub-block is different from content of a U-SIG field of the second sub-block.

11. The method according to any one of claims 7 to 10, characterized in that: The bandwidth of the first sub-block is 80 MHz.

12. The method according to any one of claims 2 to 11, characterized in that: The premodulation field includes one or more of the following: a non-high throughput short training field L-STF, a non-high throughput long training field L-LTF, a non-high throughput signal L-SIG, a repeated non-high throughput signal RL-SIG, a universal signal U-SIG and an ultra-high reliability signal UHR-SIG.

13. The method according to any one of claims 1 to 12, characterized in that The preamble code includes a first field, the first field is related to automatic gain control estimation in multiple-input multiple-output MIMO transmission, the frequency domain sequence of the first field is a first sequence, and the first sequence satisfies the first rule.

14. The method according to claim 13, characterized in that The first rule includes: the first sequence is determined based on a frequency domain sequence of the first field when the first PPDU is transmitted using a regular resource unit rRU.

15. The method according to claim 14, characterized in that The first rule includes: the first sequence is a frequency domain sequence of the first field when the first PPDU is transmitted using rRU.

16. The method according to any one of claims 13 to 15, characterized in that The subcarrier planning of the first sequence and the dRU satisfies the first rule, and the first rule includes: each dRU in the subcarrier planning includes one or more subcarrier indexes with non-zero coefficients in the first sequence.

17. The method according to claim 13, characterized in that In the case where the first PPDU is a non-trigger-based PPDU, the first rule includes: the first sequence is determined according to a frequency domain sequence of the first field when the triggered-based PPDU is transmitted using an rRU.

18. The method according to any one of claims 13 to 17, characterized in that: The first rule includes: in the first sequence, the coefficient of every N subcarrier indexes is non-0, the N is less than or equal to a first threshold, and the N and the first threshold are both positive integers.

19. The method according to claim 18, characterized in that The first threshold is less than or equal to 4.

20. The method according to any one of claims 13 to 19, characterized in that The first sequence is a frequency domain sequence obtained after phase rotation.

21. The method according to any one of claims 13 to 20, characterized in that The first field includes an Ultra High Reliability Short Training Field (UHR-STF) field.

22. The method according to any one of claims 1 to 21, characterized in that The preamble code includes a second field, the second field is related to MIMO channel estimation, the frequency domain sequence of the second field is a second sequence, and the second sequence satisfies the first rule.

23. The method according to claim 22, characterized in that The first rule includes: the second sequence is determined based on a frequency domain sequence of the second field when the first PPDU is transmitted using an rRU.

24. The method according to claim 23, characterized in that The first rule includes: the second sequence is a frequency domain sequence of the second field when the first PPDU is transmitted using rRU.

25. The method according to claim 23, characterized in that The first rule includes: the second sequence is a frequency domain sequence obtained by phase rotating the frequency domain sequence of the second field when the first PPDU is transmitted using rRU.

26. The method according to any one of claims 22 to 25, characterized in that The second field includes an ultra high reliability long training field (UHR-LTF) field.

27. The method according to any one of claims 1 to 26, characterized in that In the case where there is an unmodulated subcarrier in the data field of the first PPDU, a coefficient of the unmodulated subcarrier in a frequency domain sequence of part or all of the fields in the preamble code is 0.

28. The method according to claim 27, characterized in that The part or all of the fields include a UHR-STF field and / or a UHR-LTF field.

29. The method according to any one of claims 1 to 28, characterized in that The first rule includes: the PE field is transmitted on the dRU or dMRU occupied by the data field of the first PPDU.

30. The method according to claim 29, characterized in that The first rule includes: the frequency spectrum of the PE field is the same as the position of the subcarrier in the dRU or dMRU occupied by the data field; and / or the frequency spectrum of the PE field is the same as the size of the dRU or dMRU occupied by the data field.

31. The method according to claim 29 or 30, characterized in that The first rule includes: the transmission power of the PE field is determined based on the average transmission power of the data field.

32. The method according to any one of claims 1 to 31, characterized in that The first PPDU includes a first indication field, and the first indication field is used to indicate whether the first PPDU is transmitted using a dRU.

33. The method according to claim 32, characterized in that The first indication field belongs to one or more of the following fields: U-SIG field, UHR-SIG field.

34. The method according to any one of claims 1 to 31, characterized in that The trigger frame corresponding to the first PPDU includes a second indication field, and the second indication field is used to indicate whether the first PPDU is transmitted using dRU.

35. The method according to claim 34, characterized in that The second indication field belongs to one or more of the following fields: a common information field, a special user information field, and a variant user information field.

36. A wireless communication method, characterized in that: include: The second device receives a first physical layer protocol data unit PPDU; The first PPDU includes a preamble code and / or a packet extension PE field. When the first PPDU is transmitted using a distributed resource unit dRU, the subcarriers occupied by the preamble code and / or the PE field meet the first rule.

37. The method according to claim 36, characterized in that The preamble code includes a premodulation field, and the first rule includes: the premodulation field is transmitted using continuous subcarriers.

38. The method according to claim 37, characterized in that The premodulation field is transmitted on a first bandwidth, where the first bandwidth is a bandwidth of subcarrier distribution used by a data field of the first PPDU.

39. The method according to claim 38, characterized in that In the case where the first bandwidth occupies a plurality of 20 MHz channels, the premodulation field is replicated on the plurality of 20 MHz channels.

40. The method according to claim 39, characterized in that The premodulation field is a U-SIG field. When the first bandwidth is less than or equal to the second bandwidth and the first bandwidth occupies multiple 20 MHz channels, the premodulation field is replicated on the multiple 20 MHz channels.

41. The method according to claim 40, characterized in that The second bandwidth is 80 MHz.

42. The method according to claim 38, characterized in that The premodulation field is a U-SIG field, the first bandwidth occupies multiple sub-blocks, the multiple sub-blocks include a first sub-block, the first sub-block includes multiple 20MHz channels, and the premodulation field is replicated on part or all of the 20MHz channels in the first sub-block.

43. The method according to claim 42, characterized in that The premodulation field is replicated on a non-punctured 20 MHz channel in the first sub-block.

44. The method according to claim 42 or 43, characterized in that The first PPDU includes first indication information, where the first indication information is used to indicate whether the premodulation field copied on the 20 MHz channel is RU-adapted.

45. The method according to any one of claims 42 to 44, characterized in that The plurality of sub-blocks further include a second sub-block, and content of a U-SIG field of the first sub-block is different from content of a U-SIG field of the second sub-block.

46. ​​The method according to any one of claims 42 to 45, characterized in that The bandwidth of the first sub-block is 80 MHz.

47. The method according to any one of claims 37 to 46, characterized in that The premodulation field includes one or more of the following: a non-high throughput short training field L-STF, a non-high throughput long training field L-LTF, a non-high throughput signal L-SIG, a repeated non-high throughput signal RL-SIG, a universal signal U-SIG and an ultra-high reliability signal UHR-SIG.

48. The method according to any one of claims 36 to 47, characterized in that The preamble code includes a first field, the first field is related to automatic gain control estimation in multiple-input multiple-output MIMO transmission, the frequency domain sequence of the first field is a first sequence, and the first sequence satisfies the first rule.

49. The method according to claim 48, characterized in that The first rule includes: the first sequence is determined based on a frequency domain sequence of the first field when the first PPDU is transmitted using a regular resource unit rRU.

50. The method according to claim 49, characterized in that The first rule includes: the first sequence is a frequency domain sequence of the first field when the first PPDU is transmitted using rRU.

51. The method according to any one of claims 48 to 50, characterized in that The subcarrier planning of the first sequence and the dRU satisfies the first rule, and the first rule includes: each dRU in the subcarrier planning includes one or more subcarrier indexes with non-zero coefficients in the first sequence.

52. The method of claim 48, wherein: In the case where the first PPDU is a non-trigger-based PPDU, the first rule includes: the first sequence is determined according to a frequency domain sequence of the first field when the triggered-based PPDU is transmitted using an rRU.

53. The method according to any one of claims 48 to 52, characterized in that The first rule includes: in the first sequence, the coefficient of every N subcarrier indexes is non-0, the N is less than or equal to a first threshold, and the N and the first threshold are both positive integers.

54. The method according to claim 53, characterized in that The first threshold is less than or equal to 4.

55. The method according to any one of claims 48 to 54, characterized in that The first sequence is a frequency domain sequence obtained after phase rotation.

56. The method according to any one of claims 48 to 55, characterized in that The first field includes an Ultra High Reliability Short Training Field (UHR-STF) field.

57. The method according to any one of claims 36 to 56, characterized in that The preamble code includes a second field, the second field is related to MIMO channel estimation, the frequency domain sequence of the second field is a second sequence, and the second sequence satisfies the first rule.

58. The method according to claim 57, characterized in that The first rule includes: the second sequence is determined based on a frequency domain sequence of the second field when the first PPDU is transmitted using an rRU.

59. The method according to claim 58, characterized in that The first rule includes: the second sequence is a frequency domain sequence of the second field when the first PPDU is transmitted using rRU.

60. The method of claim 58, wherein: The first rule includes: the second sequence is a frequency domain sequence obtained by phase rotating the frequency domain sequence of the second field when the first PPDU is transmitted using rRU.

61. The method according to any one of claims 57 to 60, characterized in that The second field includes an ultra high reliability long training field (UHR-LTF) field.

62. The method according to any one of claims 36 to 61, characterized in that In the case where there is an unmodulated subcarrier in the data field of the first PPDU, a coefficient of the unmodulated subcarrier in a frequency domain sequence of part or all of the fields in the preamble code is 0.

63. The method according to claim 62, characterized in that The part or all of the fields include a UHR-STF field and / or a UHR-LTF field.

64. The method according to any one of claims 36 to 63, characterized in that The first rule includes: the PE field is transmitted on the dRU or dMRU occupied by the data field of the first PPDU.

65. The method according to claim 64, characterized in that The first rule includes: the frequency spectrum of the PE field is the same as the position of the subcarrier in the dRU or dMRU occupied by the data field; and / or the frequency spectrum of the PE field is the same as the size of the dRU or dMRU occupied by the data field.

66. The method according to claim 64 or 65, characterized in that The first rule includes: the transmission power of the PE field is determined based on the average transmission power of the data field.

67. The method according to any one of claims 36 to 66, characterized in that The first PPDU includes a first indication field, and the first indication field is used to indicate whether the first PPDU is transmitted using a dRU.

68. The method according to claim 67, characterized in that The first indication field belongs to one or more of the following fields: U-SIG field, UHR-SIG field.

69. The method according to any one of claims 36 to 66, characterized in that The trigger frame corresponding to the first PPDU includes a second indication field, and the second indication field is used to indicate whether the first PPDU is transmitted using dRU.

70. The method according to claim 69, characterized in that The second indication field belongs to one or more of the following fields: a common information field, a special user information field, and a variant user information field.

71. A communication device, characterized in that: The communication device is a first communication device, and the communication device includes: A sending unit, configured to send a first physical layer protocol data unit PPDU; The first PPDU includes a preamble code and / or a packet extension PE field. When the first PPDU is transmitted using a distributed resource unit dRU, the subcarriers occupied by the preamble code and / or the PE field meet the first rule.

72. The device according to claim 71, characterized in that The preamble code includes a premodulation field, and the first rule includes: the premodulation field is transmitted using continuous subcarriers.

73. The device according to claim 72, characterized in that The premodulation field is transmitted on a first bandwidth, where the first bandwidth is a bandwidth of subcarrier distribution used by a data field of the first PPDU.

74. The device according to claim 73, characterized in that In the case where the first bandwidth occupies a plurality of 20 MHz channels, the premodulation field is replicated on the plurality of 20 MHz channels.

75. The device according to claim 74, characterized in that The premodulation field is a U-SIG field. When the first bandwidth is less than or equal to the second bandwidth and the first bandwidth occupies multiple 20 MHz channels, the premodulation field is replicated on the multiple 20 MHz channels.

76. The device according to claim 75, characterized in that The second bandwidth is 80 MHz.

77. The apparatus according to claim 73, characterized in that The premodulation field is a U-SIG field, the first bandwidth occupies multiple sub-blocks, the multiple sub-blocks include a first sub-block, the first sub-block includes multiple 20MHz channels, and the premodulation field is replicated on part or all of the 20MHz channels in the first sub-block.

78. The device according to claim 77, characterized in that The premodulation field is replicated on a non-punctured 20 MHz channel in the first sub-block.

79. The apparatus according to claim 77 or 78, characterized in that The first PPDU includes first indication information, where the first indication information is used to indicate whether the premodulation field copied on the 20 MHz channel is RU-adapted.

80. The apparatus according to any one of claims 77 to 79, characterized in that The plurality of sub-blocks further include a second sub-block, and content of a U-SIG field of the first sub-block is different from content of a U-SIG field of the second sub-block.

81. The apparatus according to any one of claims 77 to 80, characterized in that The bandwidth of the first sub-block is 80 MHz.

82. The apparatus according to any one of claims 72 to 81, characterized in that The premodulation field includes one or more of the following: a non-high throughput short training field L-STF, a non-high throughput long training field L-LTF, a non-high throughput signal L-SIG, a repeated non-high throughput signal RL-SIG, a universal signal U-SIG and an ultra-high reliability signal UHR-SIG.

83. The apparatus according to any one of claims 71-72, characterized in that The preamble code includes a first field, the first field is related to automatic gain control estimation in multiple-input multiple-output MIMO transmission, the frequency domain sequence of the first field is a first sequence, and the first sequence satisfies the first rule.

84. The device according to claim 83, characterized in that The first rule includes: the first sequence is determined based on a frequency domain sequence of the first field when the first PPDU is transmitted using a regular resource unit rRU.

85. The device according to claim 84, characterized in that The first rule includes: the first sequence is a frequency domain sequence of the first field when the first PPDU is transmitted using rRU.

86. The apparatus according to any one of claims 83 to 85, characterized in that The subcarrier planning of the first sequence and the dRU satisfies the first rule, and the first rule includes: each dRU in the subcarrier planning includes one or more subcarrier indexes with non-zero coefficients in the first sequence.

87. The apparatus according to claim 83, characterized in that In the case where the first PPDU is a non-trigger-based PPDU, the first rule includes: the first sequence is determined according to a frequency domain sequence of the first field when the triggered-based PPDU is transmitted using an rRU.

88. The apparatus according to any one of claims 83 to 87, characterized in that The first rule includes: in the first sequence, the coefficient of every N subcarrier indexes is non-0, the N is less than or equal to a first threshold, and the N and the first threshold are both positive integers.

89. The device according to claim 88, characterized in that The first threshold is less than or equal to 4.

90. The apparatus according to any one of claims 83 to 89, characterized in that The first sequence is a frequency domain sequence obtained after phase rotation.

91. The apparatus according to any one of claims 83 to 90, characterized in that The first field includes an Ultra High Reliability Short Training Field (UHR-STF) field.

92. The apparatus according to any one of claims 71 to 91, characterized in that The preamble code includes a second field, the second field is related to MIMO channel estimation, the frequency domain sequence of the second field is a second sequence, and the second sequence satisfies the first rule.

93. The device according to claim 92, characterized in that The first rule includes: the second sequence is determined based on a frequency domain sequence of the second field when the first PPDU is transmitted using an rRU.

94. The device according to claim 93, characterized in that The first rule includes: the second sequence is a frequency domain sequence of the second field when the first PPDU is transmitted using rRU.

95. The device according to claim 93, characterized in that The first rule includes: the second sequence is a frequency domain sequence obtained by phase rotating the frequency domain sequence of the second field when the first PPDU is transmitted using rRU.

96. The apparatus according to any one of claims 92 to 95, characterized in that The second field includes an ultra high reliability long training field (UHR-LTF) field.

97. The apparatus according to any one of claims 71 to 96, characterized in that In the case where there is an unmodulated subcarrier in the data field of the first PPDU, a coefficient of the unmodulated subcarrier in a frequency domain sequence of part or all of the fields in the preamble code is 0.

98. The device according to claim 97, characterized in that The part or all of the fields include a UHR-STF field and / or a UHR-LTF field.

99. The apparatus according to any one of claims 71 to 98, characterized in that The first rule includes: the PE field is transmitted on the dRU or dMRU occupied by the data field of the first PPDU.

100. The apparatus according to claim 99, characterized in that The first rule includes: the frequency spectrum of the PE field is the same as the position of the subcarrier in the dRU or dMRU occupied by the data field; and / or the frequency spectrum of the PE field is the same as the size of the dRU or dMRU occupied by the data field.

101. The device according to claim 99 or 100, characterized in that The first rule includes: the transmission power of the PE field is determined based on the average transmission power of the data field.

102. The apparatus according to any one of claims 71 to 101, characterized in that The first PPDU includes a first indication field, and the first indication field is used to indicate whether the first PPDU is transmitted using a dRU.

103. The device according to claim 102, characterized in that The first indication field belongs to one or more of the following fields: U-SIG field, UHR-SIG field.

104. The apparatus according to any one of claims 71 to 103, characterized in that The trigger frame corresponding to the first PPDU includes a second indication field, and the second indication field is used to indicate whether the first PPDU is transmitted using dRU.

105. The device according to claim 104, characterized in that The second indication field belongs to one or more of the following fields: a common information field, a special user information field, and a variant user information field.

106. A communication device, characterized in that: The communication device is a second device, and the communication device includes: A receiving unit, configured to receive a first physical layer protocol data unit PPDU; The first PPDU includes a preamble code and / or a packet extension PE field. When the first PPDU is transmitted using a distributed resource unit dRU, the subcarriers occupied by the preamble code and / or the PE field meet the first rule.

107. The device according to claim 106, characterized in that The preamble code includes a premodulation field, and the first rule includes: the premodulation field is transmitted using continuous subcarriers.

108. The device according to claim 107, characterized in that The premodulation field is transmitted on a first bandwidth, where the first bandwidth is a bandwidth of subcarrier distribution used by a data field of the first PPDU.

109. The device according to claim 108, characterized in that In the case where the first bandwidth occupies a plurality of 20 MHz channels, the premodulation field is replicated on the plurality of 20 MHz channels.

110. The device according to claim 109, characterized in that The premodulation field is a U-SIG field. When the first bandwidth is less than or equal to the second bandwidth and the first bandwidth occupies multiple 20 MHz channels, the premodulation field is replicated on the multiple 20 MHz channels.

111. The device according to claim 110, characterized in that The second bandwidth is 80 MHz.

112. The device according to claim 108, characterized in that The premodulation field is a U-SIG field, the first bandwidth occupies multiple sub-blocks, the multiple sub-blocks include a first sub-block, the first sub-block includes multiple 20MHz channels, and the premodulation field is replicated on part or all of the 20MHz channels in the first sub-block.

113. The device according to claim 112, characterized in that The premodulation field is replicated on a non-punctured 20 MHz channel in the first sub-block.

114. The device according to claim 112 or 113, characterized in that The first PPDU includes first indication information, where the first indication information is used to indicate whether the premodulation field copied on the 20 MHz channel is RU-adapted.

115. The device according to any one of claims 112 to 114, characterized in that The plurality of sub-blocks further include a second sub-block, and content of a U-SIG field of the first sub-block is different from content of a U-SIG field of the second sub-block.

116. The device according to any one of claims 112 to 115, characterized in that The bandwidth of the first sub-block is 80 MHz.

117. The apparatus according to any one of claims 107 to 116, characterized in that The premodulation field includes one or more of the following: a non-high throughput short training field L-STF, a non-high throughput long training field L-LTF, a non-high throughput signal L-SIG, a repeated non-high throughput signal RL-SIG, a universal signal U-SIG and an ultra-high reliability signal UHR-SIG.

118. The apparatus according to any one of claims 106-117, characterized in that The preamble code includes a first field, the first field is related to automatic gain control estimation in multiple-input multiple-output MIMO transmission, the frequency domain sequence of the first field is a first sequence, and the first sequence satisfies the first rule.

119. The device according to claim 118, characterized in that The first rule includes: the first sequence is determined based on a frequency domain sequence of the first field when the first PPDU is transmitted using a regular resource unit rRU.

120. The device according to claim 119, characterized in that The first rule includes: the first sequence is a frequency domain sequence of the first field when the first PPDU is transmitted using rRU.

121. The apparatus according to any one of claims 118 to 120, characterized in that The subcarrier planning of the first sequence and the dRU satisfies the first rule, and the first rule includes: each dRU in the subcarrier planning includes one or more subcarrier indexes with non-zero coefficients in the first sequence.

122. The device according to claim 118, characterized in that In the case where the first PPDU is a non-trigger-based PPDU, the first rule includes: the first sequence is determined according to a frequency domain sequence of the first field when the triggered-based PPDU is transmitted using an rRU.

123. The apparatus according to any one of claims 118 to 122, characterized in that The first rule includes: in the first sequence, the coefficient of every N subcarrier indexes is non-0, the N is less than or equal to a first threshold, and the N and the first threshold are both positive integers.

124. The device according to claim 123, characterized in that The first threshold is less than or equal to 4.

125. The apparatus according to any one of claims 118 to 124, characterized in that The first sequence is a frequency domain sequence obtained after phase rotation.

126. The apparatus according to any one of claims 115 to 125, characterized in that The first field includes an Ultra High Reliability Short Training Field (UHR-STF) field.

127. The apparatus according to any one of claims 106 to 126, characterized in that The preamble code includes a second field, the second field is related to MIMO channel estimation, the frequency domain sequence of the second field is a second sequence, and the second sequence satisfies the first rule.

128. The device according to claim 127, characterized in that The first rule includes: the second sequence is determined based on a frequency domain sequence of the second field when the first PPDU is transmitted using an rRU.

129. The device according to claim 128, characterized in that The first rule includes: the second sequence is a frequency domain sequence of the second field when the first PPDU is transmitted using rRU.

130. The device according to claim 129, characterized in that The first rule includes: the second sequence is a frequency domain sequence obtained by phase rotating the frequency domain sequence of the second field when the first PPDU is transmitted using rRU.

131. The apparatus according to any one of claims 127 to 130, characterized in that The second field includes an ultra high reliability long training field (UHR-LTF) field.

132. The apparatus according to any one of claims 106 to 131, characterized in that In the case where there is an unmodulated subcarrier in the data field of the first PPDU, a coefficient of the unmodulated subcarrier in a frequency domain sequence of part or all of the fields in the preamble code is 0.

133. The device according to claim 132, characterized in that The part or all of the fields include a UHR-STF field and / or a UHR-LTF field.

134. The apparatus according to any one of claims 106 to 133, characterized in that The first rule includes: the PE field is transmitted on the dRU or dMRU occupied by the data field of the first PPDU.

135. The device according to claim 134, characterized in that The first rule includes: the frequency spectrum of the PE field is the same as the position of the subcarrier in the dRU or dMRU occupied by the data field; and / or the frequency spectrum of the PE field is the same as the size of the dRU or dMRU occupied by the data field.

136. The apparatus according to claim 134 or 135, characterized in that The first rule includes: the transmission power of the PE field is determined based on the average transmission power of the data field.

137. The apparatus according to any one of claims 106 to 136, characterized in that The first PPDU includes a first indication field, and the first indication field is used to indicate whether the first PPDU is transmitted using a dRU.

138. The device according to claim 137, characterized in that The first indication field belongs to one or more of the following fields: U-SIG field, UHR-SIG field.

139. The apparatus according to any one of claims 106-136, characterized in that The trigger frame corresponding to the first PPDU includes a second indication field, and the second indication field is used to indicate whether the first PPDU is transmitted using dRU.

140. The apparatus according to claim 139, characterized in that The second indication field belongs to one or more of the following fields: a common information field, a special user information field, and a variant user information field.

141. A communication device, characterized in that: It comprises a memory and a processor, the memory is used to store a program, and the processor is used to call the program in the memory so that the communication device executes the method as described in any one of claims 1-56.

142. A device, characterized in that: It comprises a processor, which is used to call a program from a memory so that the device executes the method as described in any one of claims 1-70.

143. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 70.

144. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing a computer to execute the method according to any one of claims 1 to 70.

145. A computer program product, characterized in that A program is included, which causes a computer to execute the method as claimed in any one of claims 1 to 70.

146. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 70.

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