Method for communication and communication device

Abstract

A method for communication and a communication device are provided. The method comprises the following steps: a first device executes a first operation according to first information; wherein the first device receives a signal through the first link and the second link, the channel center frequency of the first link is lower than the channel center frequency of the second link, the first information is related to phase noise information of the first link, and the first operation is related to phase noise of the second link. It can be understood that the invention provides a technical scheme for realizing high-frequency link phase noise estimation under a high and low frequency multi-link operation framework. In addition, the high-frequency link is high in data transmission rate, large in overhead and short in transmission distance, and the low-frequency link is low in data transmission rate, small in overhead and long in transmission distance. According to the invention, high frequency can be compensated by low frequency, so that the influence of phase noise on a high frequency band is reduced as much as possible, and rapid and reliable data transmission is realized.

Description

Communication method and communication device Technical Field

[0001] The present application relates to the field of communication technology, and more particularly, to a method for communication and a communication device. Background Art

[0002] Phase noise is a key indicator of the frequency stability of frequency standards (such as high-stability crystal oscillators and atomic frequency standards). It is also a type of modulation noise in communication systems. Phase noise estimation and correction techniques include phase reference data-assisted and decision data-driven approaches. However, these techniques all present numerous challenges.

[0003] Summary of the Invention

[0004] The present application provides a method and a communication device for communication. The following introduces various aspects involved in the present application.

[0005] In a first aspect, a method for communication is provided, including: a first device performing a first operation based on first information; wherein the first device receives signals through a first link and a second link, a channel center frequency of the first link is lower than a channel center frequency of the second link, the first information is related to phase noise information of the first link, and the first operation is related to the phase noise of the second link.

[0006] In a second aspect, a method for communication is provided, including: a second device receives a first field sent by a first device; wherein, the first device receives signals through a first link and a second link, the channel center frequency of the first link is lower than the channel center frequency of the second link, the first information is related to the phase noise information of the first link, and the first operation is related to the phase noise of the second link; the first field is used to indicate one or more of the following information: whether the first device performs the first operation according to the first information; subcarrier planning of the second link.

[0007] According to a third aspect, a communication device is provided, which is a first device and includes: an execution unit for performing a first operation based on first information; wherein the first device receives signals through a first link and a second link, the channel center frequency of the first link is lower than the channel center frequency of the second link, the first information is related to the phase noise information of the first link, and the first operation is related to the phase noise of the second link.

[0008] In a fourth aspect, a communication device is provided, which is a second device and includes: a receiving unit for receiving a first field sent by a first device; wherein the first device receives signals through a first link and a second link, the channel center frequency of the first link is lower than the channel center frequency of the second link, the first information is related to the phase noise information of the first link, and the first operation is related to the phase noise of the second link; the first field is used to indicate one or more of the following information: whether the first device performs the first operation according to the first information; subcarrier planning of the second link.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] It is understood that this application provides a technical solution for realizing high-frequency link phase noise estimation within a high- and low-frequency multi-link operation framework. Furthermore, high-frequency (HF) links have fast data transmission rates but high overhead and short transmission distances, while low-frequency (LF) links have low data transmission rates but low overhead and long transmission distances. Through this application, low-frequency compensation for high-frequency can be achieved, thereby minimizing the impact of phase noise on the high-frequency band and achieving fast and reliable data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0016] FIG2 is a schematic diagram showing the distribution of resource units (RUs) of a physical layer protocol data unit (PPDU).

[0017] FIG3 is a schematic flowchart of a method for communication provided in an embodiment of the present application.

[0018] FIG4 is a schematic diagram of a scenario to which the method provided in an embodiment of the present application is applicable.

[0019] FIG5A is an example diagram of an ultra-high reliability (UHR) multi-user (MU) PPDU format.

[0020] FIG. 5B is a diagram illustrating an example of a UHR trigger-based (TB) PPDU format.

[0021] FIG6 is a schematic diagram of a simulation result provided by this application.

[0022] FIG7 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

[0023] FIG8 is a schematic structural diagram of another communication device provided in an embodiment of the present application.

[0024] FIG9 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solution in this application will be described below with reference to the accompanying drawings.

[0026] Communication System

[0027] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as wireless local area networks (WLAN), wireless fidelity (Wi-Fi), 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] In some scenarios, the aforementioned communication device may also be a "multi-link device (MLD)," meaning a device capable of communicating via multiple communication links. These multiple communication links may include links in different frequency bands, such as millimeter-wave and / or low-frequency bands. Typically, if the multi-link device is an AP, the AP is also referred to as an AP MLD. If the multi-link device is a non-AP STA, the STA is also referred to as a non-AP MLD.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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, in-vehicle devices, wearable devices, terminal devices in 5G networks or future-evolved public land mobile communication networks. The terminal equipment in the network (PLMN), etc., is not limited to this in the embodiments of the present application.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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).

[0047] 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.

[0048] Subcarrier planning (tone plan)

[0049] Orthogonal frequency division multiplexing (OFDM) technology can be used to divide the channel bandwidth into multiple frequency components at certain frequency intervals within the channel bandwidth. These components are called subcarriers or tones.

[0050] When OFDM and multiple user multiple input multiple output (MU-MIMO) technologies are applied, the spectrum bandwidth can be divided into several RUs.

[0051] Subcarrier planning can be understood as the distribution of subcarriers or resource block locations (RU locations) that carry data. Different channel bandwidths can correspond to different subcarrier plans. The following uses a 20MHz channel bandwidth as an example to illustrate subcarrier planning defined in related technologies.

[0052] FIG2 is a schematic diagram of RU locations in a 20 MHz extremely high throughput (EHT) PPDU.

[0053] As shown in Figure 2, for a 20 MHz channel bandwidth, there can be a maximum of nine 26-tone RUs, four 52-tone RUs, two 106-tone RUs, or one 242-tone RU.

[0054] As shown in Figure 2, each 26-tone RU has 24 data subcarriers and 2 pilot subcarriers; each 52-tone RU has 48 data subcarriers and 4 pilot subcarriers; each 106-tone RU has 102 data subcarriers and 4 pilot subcarriers; and each 242-tone RU has 234 data subcarriers and 8 pilot subcarriers. The data subcarriers in each RU are used for actual data transmission, while the pilot subcarriers are used for phase tracking. The pilot subcarriers in the data domain are distributed as shown in Figure 2, with position indices of [±116, ±102, ±90, ±76, ±62, ±48, ±36, ±22, ±10].

[0055] In addition, as shown in FIG2 , the channel bandwidth may include one or more of a direct current (DC) subcarrier, a null carrier, and a guard tone.

[0056] The RU index and subcarrier range corresponding to the RU distribution shown in FIG2 are shown in Table 1.

[0057] Table 1

[0058] High-frequency OFDM parameter design

[0059] Regarding the current discussions on OFDM parameter design for the high-frequency millimeter-wave physical layer (PHY), related technologies tend to reuse existing low-frequency RF circuits (such as IEEE 802.11ax / be).

[0060] In some embodiments, low-frequency OFDM parameters (e.g., parameters specified in IEEE 802.11ax / be) may be multiplied by m to obtain high-frequency OFDM parameters. m may be referred to as a multiplication parameter. m may be a positive integer. For example, m may be equal to 2, 4, or 8.

[0061] For example, corresponding to the low-frequency bandwidths of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz, the bandwidth of the millimeter wave PHY can be obtained by multiplying by m. That is, the bandwidth of the millimeter wave PHY can be m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz. For another example, the subcarrier spacing of the millimeter wave PHY can be multiplied by m to obtain the subcarrier spacing of the millimeter wave PHY. That is, for the data field, the subcarrier spacing of the millimeter wave PHY can be m*78.125 kHz.

[0062] Phase noise (PN) estimation

[0063] Phase noise is an important indicator used to measure the frequency stability quality of frequency standard sources (such as high-stable crystal oscillators, atomic frequency standards, etc.), and it is also a kind of modulation noise in communication systems. Phase noise is mainly caused by the nonlinear factors of the local oscillators at the receiving and transmitting ends. In the related art, phase noise estimation or correction is achieved through a phase noise reference signal (referred to as a reference signal for short) or a pilot subcarrier. Exemplarily, the related art corrects the phase noise by inserting a reference signal in the time domain, that is, the receiving end obtains the phase error of the input signal after the reference signal is inserted in a specific time period, and obtains the phase error of the original input signal without the reference signal, and then obtains the phase offset value of the phase noise by linear interpolation between the two phase errors, thereby correcting the phase noise according to the phase offset value.

[0064] The impact of phase noise on OFDM systems can be categorized into two parts: common phase error (CPE) and inter-carrier interference (ICI). CPE can cause all subcarriers to have the same phase shift. ICI refers to random phase errors between subcarriers, which destroy the orthogonality between subcarriers.

[0065] Phase noise estimation and correction techniques may include: phase reference data assisted and decision data guided.These phase noise estimation and correction techniques all have many problems.

[0066] The performance of phase reference data-assisted techniques is closely related to the reference signal type, as well as the density and placement of the reference signal. Therefore, the density and placement of the reference signal determine the accuracy of the phase noise estimate. Reference signals can include pilot subcarriers, so the accuracy of the phase noise estimate is highly dependent on the number of pilot subcarriers.

[0067] The decision data-oriented technology determines the phase noise estimation value based on the decision result by making a decision on the compensated signal. It requires multiple iterations, has high algorithm complexity and high overhead.

[0068] The embodiment of the present application provides a method as shown in FIG3 to solve the above problem.

[0069] The method shown in FIG3 may be executed by the first device.

[0070] The first device can receive and / or send signals through multiple links. That is, the first device can be an MLD. For example, the first device can be an AP MLD or a non-AP MLD.

[0071] The method shown in FIG3 may include step S310 .

[0072] Step S310: The first device performs a first operation according to the first information.

[0073] As described above, the first device can receive signals via multiple links, i.e., the first device can perform multi-link operation (MLO). The multiple links may include, for example, a first link and a second link. The frequency of the first link may be lower than the frequency of the second link. The frequency may refer to the channel center frequency. In other words, the first link is a low-frequency link, and the second link is a high-frequency link.

[0074] For example, the frequency of the first link may be sub-7 GHz. For example, the frequency of the first link may be 5 GHz.

[0075] For another example, the frequency of the second link can be any value between 26.5 GHz and 300 GHz. In other words, the second link can be a millimeter wave link. The frequency of the second link can be, for example, 60 GHz.

[0076] Exemplarily, the first link may be a link defined in IEEE 802.11be.

[0077] It should be noted that for MLO, since the transmission overhead of the high-frequency link is large, while the transmission overhead of the low-frequency link is small, the low-frequency link can be kept open all the time.

[0078] The first information may be related to phase noise information of the first link. For example, the first information may include one or more of the following: a phase noise estimation result of the first link, and information used to determine the phase noise estimation result of the first link.

[0079] The first operation may be related to the phase noise of the second link. Therefore, step S310 may be understood as performing an operation related to the high-frequency phase noise based on the low-frequency phase noise.

[0080] Exemplarily, the first operation may include one or more of the following: estimating the phase noise of the second link, and correcting the phase based on the phase noise of the second link. It is understood that, according to step S310, the first device can estimate and / or correct high-frequency phase noise based on low-frequency phase noise information. Therefore, the technical solution provided in this embodiment of the application can be referred to as a "low-frequency compensation for high-frequency" phase noise estimation and / or correction technology.

[0081] As can be seen above, phase noise is caused by non-ideal factors in the system hardware. Therefore, phase noise increases with increasing channel center frequency. In other words, high-frequency carrier OFDM is more susceptible to phase noise. Therefore, based on the high-frequency phase noise estimation and / or correction scheme proposed in this application, communication equipment can effectively reduce or avoid the adverse effects of high-frequency link phase noise on high-frequency communications.

[0082] Furthermore, when high-frequency band resources are introduced, a network environment where both high- and low-frequency resources coexist may exist. On one hand, this application provides a technical solution for implementing high-frequency link phase noise estimation within a high- and low-frequency multi-link operation framework. On the other hand, high-frequency links have high data transmission rates but high overhead and short transmission distances, while low-frequency links have low data transmission rates but low overhead and long transmission distances. This application allows low-frequency links to compensate for high frequencies, minimizing the impact of phase noise on high-frequency bands and achieving fast and reliable data transmission. Furthermore, this application utilizes the relationship between phase noise and channel center frequency to perform phase noise estimation at the low-frequency link receiver and share this estimation information with the high-frequency link. The high-frequency link can use the low-frequency link phase noise estimation information to estimate and / or compensate for the high-frequency link phase noise at the receiver. Therefore, in terms of computational complexity, the high-frequency link can perform phase noise estimation and / or verification without using pilot reference signals. This allows the number of pilot subcarriers to be reduced or eliminated during PPDU design, thereby increasing the number of data subcarriers. Based on this, this application can significantly reduce computational resource consumption and increase the effective utilization of spectrum resources.

[0083] When the first information includes a phase noise estimation result of the first link, the phase noise estimation result of the first link can be obtained based on the pilot subcarrier of the first link. That is, the phase noise estimation result of the first link can be determined by relevant technologies. For example, the first device can estimate the phase noise of the first link by using a pilot phase tracking technology. Exemplarily, signals such as pilot subcarriers and channel state information (CSI) can be used as reference signals to estimate phase noise.

[0084] In some embodiments, phase noise may include CPE. The inventors of this application discovered that there is a corresponding numerical relationship between CPE estimation information and the channel center frequency. Therefore, the phase noise of data subcarriers on the high-frequency link can be estimated by combining the CPE estimation information of the low-frequency link. It should be noted that this discovery has also been verified by simulation.

[0085] In some embodiments, the carrier corresponding to the first link and the carrier corresponding to the second link share a crystal oscillator. In other words, the technical solution proposed in this application can include the high-frequency carrier and the low-frequency carrier sharing a crystal oscillator. Currently, chip manufacturers generally use a single crystal oscillator when implementing dual-frequency, so this application can be applied to most devices.

[0086] In some embodiments, the first operation may be performed not only based on the first information, but also based on other information. The other information may include one or more of the following information: the channel bandwidth of the first link, the channel bandwidth of the second link, the channel center frequency of the first link, the channel center frequency of the second link, and other OFDM-related parameters. Among them, the other OFDM-related parameters may include, for example, subcarrier spacing (SCS).

[0087] The following describes in detail how to perform the first operation based on the first information and / or other information by taking examples.

[0088] In some embodiments, the first information may be determined from a first PPDU transmitted on a first link, and the first operation may be related to the phase noise of a second PPDU transmitted on a second link. For example, the first information may include a phase noise estimation result for symbols of the first PPDU. The first operation may include estimating the phase noise of symbols of the second PPDU and / or correcting the phase based on the phase noise of the symbols of the second PPDU.

[0089] As a possible embodiment, the first device may receive a first PPDU on a first link and a second PPDU on a second link. The first PPDU and the second PPDU may be sent or received simultaneously. Simultaneously may mean that the start time of the first PPDU is aligned with the start time of the second PPDU, and the end time of the first PPDU is aligned with the end time of the second PPDU. The first device may use the pilot subcarriers in the first PPDU to perform phase tracking, perform phase noise estimation on the OFDM symbols of the first PPDU, and obtain a phase noise estimation result. The first device may determine the phase noise estimation result of the OFDM symbols of the second PPDU based on the phase noise estimation result of the OFDM symbols of the first PPDU.

[0090] The following describes the scenario shown in Figure 4. As shown in Figure 4, the AP MLD includes AP1 and AP2. The non-AP MLD includes STA1 and STA2. PPDU1 and PPDU3 are transmitted via the first link (represented by link 1 in Figure 4). The first link is a low-frequency link. The second link is a high-frequency link. PPDU2 and PPDU4 are transmitted via the second link (represented by link 2 in FIG. 4 ). When an AP MLD sends a PPDU to a non-AP MLD, the first PPDU may be PPDU1 or PPDU3 in FIG. 4 , and the second PPDU may be PPDU2 and PPDU4 in FIG. 4 . When a non-AP MLD sends a PPDU to an AP MLD, the first PPDU may be PPDU2 or PPDU4 in FIG. 4 , and the second PPDU may be PPDU1 and PPDU3 in FIG. 4 . As shown in FIG. 4 , PPDU1 and PPDU2 are transmitted simultaneously, and PPDU3 and PPDU4 are transmitted simultaneously. The first device may determine the phase noise estimation result for the OFDM symbols of PPDU2 based on the phase noise estimation result for the OFDM symbols of PPDU1. The first device may determine the phase noise estimation result for the OFDM symbols of PPDU4 based on the phase noise estimation result for the OFDM symbols of PPDU3.

[0091] In some embodiments, the first operation may include determining a first matrix for the second link. The first matrix may be related to a phase noise reference matrix for the second link.

[0092] For example, the first information may include a phase noise reference matrix of the first link, and the first matrix may include a phase noise reference matrix of the second link. In other words, the phase noise reference matrix of the second link can be directly obtained from the phase noise reference matrix of the first link through calculation.

[0093] For another example, the first information may include a phase noise reference matrix for the first link. The phase noise reference matrix for the first link can be calculated to obtain a first matrix, and the first matrix can be calculated to obtain a phase noise reference matrix for the second link. In other words, the phase noise reference matrix for the second link can be indirectly obtained by calculating the first matrix.

[0094] For example, the first matrix can satisfy Among them, CPE HF Can represent the first matrix, CPE LF It can represent the phase noise reference matrix of the first link, a can be related to the channel bandwidth of the first link and / or the channel bandwidth of the second link, b and c can be other parameters that affect the phase noise, and fc low represents the frequency of the first link, fc high Indicates the frequency of the second link.

[0095] Optionally, a may satisfy: Among them, BW LF It can represent the channel bandwidth of the first link, BW HF It can represent the channel bandwidth of the second link, and m is a multiplication parameter. The value of m can be a positive number.

[0096] b and c may be other parameters that affect phase noise estimation. Other parameters that affect phase noise estimation may be any parameters that can affect phase noise estimation, and this application does not limit this. Other parameters that affect phase noise estimation may include, for example, channel state information, training fields, and the like.

[0097] b or c can be any value. For example, b or c can be an integer, a negative number, or 0. For example, if b = c = 0, then That is, the calculation of the first matrix may only consider the influence of the channel center frequency and the channel bandwidth on the phase noise, without considering other factors.

[0098] The symbol duration (e.g., OFDM symbol) of the second link may differ from the symbol duration of the first link. However, the phase noise estimation results can correspond one-to-one with the symbols. Therefore, the number of symbols corresponding to the phase noise estimation results of the first link may differ from the number of symbols corresponding to the phase noise estimation results of the second link. Therefore, the phase noise estimation results of the first link need to be processed to obtain the phase noise estimation results for each symbol of the second link.

[0099] In some embodiments, the phase noise of multiple symbols of the second link can be obtained by estimating the phase noise of one symbol of the first link. For example, the phase noise reference matrix of the second link can be obtained by repeating some or all elements in the first matrix.

[0100] Optionally, the phase noise estimation results of n symbols of the second link can be obtained by the phase noise estimation result of the same symbol of the first link. n can satisfy: T SYM,LF and T SYM,HF are the first link OFDM symbol duration and the second link OFDM symbol duration, respectively. For example, n=4, 8, 16 or 32.

[0101] Exemplarily, the phase noise estimation results of the second link may satisfy one or more of the following: the phase noise estimation results of the 1st to nth symbols of the second link can be obtained through the phase noise estimation result of the 1st symbol of the first link; the phase noise estimation results of the n+1th to 2nth symbols of the second link can be obtained through the phase noise estimation result of the 2nd symbol of the first link; the phase noise estimation results of the 2n+1th to 3nth symbols of the second link can be obtained through the phase noise estimation result of the 3rd symbol of the first link; and so on.

[0102] The following description is made by taking the example shown in Table 2 as an example. Table 2 shows a CPE result in which the first link is an OFDM symbol of 5 GHz.

[0103] Table 2

[0104] The first matrix satisfies CPE HF =12CPE LF For example, if the second link is 60 GHz, then n=4. A CPE estimation result of the OFDM symbol of the second link may be as shown in Table 3.

[0105] Table 3

[0106] As can be seen from Table 3, the CPEs of symbols 1 to 4 of the second link (indicated by "high-frequency symbols" in Table 3) are the same, and are all obtained by multiplying the CPE of symbol 1 of the first link (indicated by "low-frequency symbols" in Table 3) by 12; the CPEs of symbols 5 to 8 of the second link are the same, and are all obtained by multiplying the CPE of symbol 2 of the first link by 12; the CPEs of symbols 9 to 12 of the second link are the same, and are all obtained by multiplying the CPE of symbol 3 of the first link by 12; the CPEs of symbols 13 to 16 of the second link are the same, and are all obtained by multiplying the CPE of symbol 4 of the first link by 12; the CPEs of symbols 17 to 20 of the second link are the same, and are all obtained by multiplying the CPE of symbol 5 of the first link by 12; and the CPEs of symbols 21 to 24 of the second link are the same, and are all obtained by multiplying the CPE of symbol 6 of the first link by 12.

[0107] In some embodiments, the phase noise of a symbol of the second link can be obtained by interpolating the phase noise estimation results of multiple symbols of the first link. For example, the phase noise reference matrix of the second link can be obtained by interpolating the first matrix.

[0108] It should be noted that this application does not limit the interpolation algorithm used for interpolation. For example, the interpolation algorithm may include linear interpolation.

[0109] Optionally, the number of interpolations may be, for example, (n-1). That is, through the interpolation algorithm, (n-1) values ​​may be inserted into the phase noise estimation results of the two symbols of the first link, thereby obtaining the phase noise estimation results of each symbol of the second link based on the interpolated phase noise estimation results. Where n may satisfy: T SYM,LF and T SYM,HF are the first link OFDM symbol duration and the second link OFDM symbol duration, respectively. For example, n=4, 8, 16 or 32.

[0110] Next, based on Table 2, the first matrix satisfies CPE. HF =12CPE LF For example, if the second link is 60 GHz, then n=4. Another CPE estimation result of the OFDM symbol of the second link may be shown in Table 4.

[0111] Table 4

[0112] As can be seen from Table 3, the CPE of symbol 1 of the second link (represented by "high-frequency symbols" in Table 4) = the CPE of symbol 1 of the first link (represented by "low-frequency symbols" in Table 3) × 12. The CPE of symbol 5 of the second link = the CPE of symbol 2 of the first link × 12. The CPE of symbol 9 of the second link = the CPE of symbol 3 of the first link × 12. The CPE of symbol 13 of the second link = the CPE of symbol 4 of the first link × 12. The CPE of symbol 17 of the second link = the CPE of symbol 5 of the first link × 12. The CPE of symbol 21 of the second link = the CPE of symbol 6 of the first link × 12. The CPE of the other symbols of the second link is obtained by interpolating the already determined CPE of symbols 1, 5, 9, 13, 17, and 21.

[0113] In some embodiments, the first device may store the waveform transmitted by the second link to correct the phase using the first information. Therefore, compared to using pilot subcarrier-based phase correction, the first device may set a larger buffer space to store the waveform transmitted by the second link.

[0114] To facilitate understanding, the technical solution of “low frequency compensating high frequency” proposed in this application is described below through Example 1.

[0115] Example 1

[0116] The method provided in Example 1 can be performed by a first device and a second device. The first device is a non-AP MLD. The second device is an AP MLD. The first link is a 5 GHz link (indicated by "low-frequency link 1"), and the second link is a 60 GHz link (indicated by "high-frequency link 2"). Example 1 may include steps S1-S4.

[0117] In step S1 , the AP MLD sends PPDUs on the low-frequency link 1 and the high-frequency link 2 simultaneously.

[0118] In step S2, the non-AP MLD receives the PPDU transmitted by low-frequency link 1 and uses the pilot phase tracking algorithm to perform CPE estimation to obtain the CPE of some OFDM symbols of the PPDU in low-frequency link 1, as shown in Table 2.

[0119] In step S3, the non-AP MLD transmits the CPE result estimated by the low-frequency link 1 to the high-frequency link 2. Based on the low-frequency CPE estimation result, the channel bandwidth of the high-frequency link 2 and the formula Calculate and obtain the high-frequency CPE reference matrix (i.e., the first matrix) based on low-frequency assistance. high =60GHz,fc low =5GHz. Since the low frequency 20MHz corresponds to the high frequency 160MHz, Only the influence of the channel center frequency and channel bandwidth on the phase noise is considered, so b = 0, c = 0. Therefore, the high-frequency CPE estimation result is CPE HF =12CPE LF .

[0120] In Example 1, the low-frequency OFDM symbol time is four times the high-frequency OFDM symbol time, i.e., n = 4. The number of interpolations is n-1 = 3. Based on this, the CPE of the OFDM symbol in the high-frequency 60 GHz PPDU calculated based on the low-frequency calculation is obtained through interpolation, as shown in Table 4.

[0121] In step S4, the non-AP MLD compensates the high-frequency OFDM symbols according to the CPE in Table 4.

[0122] This application also proposes a tone plan for the PHY of the second link.

[0123] In some embodiments, when the channel bandwidth of the second link is m×M, the tone plan of the second link may correspond to a tone plan with a channel bandwidth of M, where m is a multiplication parameter.

[0124] “Corresponding” may mean that some parameters or plans in the tone plan are the same; or, the tone plan of the second link is determined based on the tone plan with a channel bandwidth of M.

[0125] Exemplarily, when the bandwidth of the second link is m*20MHz, m*40MHz, m*80MHz, m*160MHz or m*320MHz, the second link corresponds to the tone plan of the first link with a bandwidth of 20MHz, 40MHz, 80MHz, 160MHz or 320MHz, respectively.

[0126] For example, the number of RUs of the same type in the tone plan of the second link can be the same. Taking the multiplication parameters m = 8 and M = 20 MHz as an example, the second link with a bandwidth of m × M = 160 MHz can have 9 26-tone RUs, 4 52-tone RUs, 2 106-tone RUs, or 1 242-tone RU. For example, the RU distribution diagram of a PPDU with a 160 MHz channel bandwidth can be shown in Figure 2.

[0127] For another example, the index and subcarrier range of the same type of RU in the tone plan of the second link can be the same. Taking the multiplication parameters m = 8 and M = 20MHz as an example, the RU index and subcarrier range of the second link with a bandwidth of m×M = 160MHz can be consistent with some or all of the contents in Table 1.

[0128] In some embodiments, in the subcarrier planning of the second link, the number of pilot subcarriers in the first type of subcarrier resource unit is a first number. In the subcarrier planning with a channel bandwidth of M, the number of pilot subcarriers in the first type of subcarrier resource unit is a second number, where the first number is less than the second number. The first number can be an integer greater than or equal to 0; the second number can be an integer greater than 0. In other words, the number of high-frequency pilot subcarriers can be appropriately reduced or deleted.

[0129] Based on this application, phase noise estimation and / or correction can be achieved through a "low-frequency compensation for high-frequency" approach. In other words, this application can achieve phase noise estimation and / or correction without relying on high-frequency pilot subcarriers. Therefore, reducing the number of high-frequency pilot subcarriers does not affect the accuracy of phase noise estimation. Furthermore, the reduced or deleted pilot subcarriers can become data subcarriers, thereby improving transmission throughput.

[0130] For example, when the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 26-tone RU can be 26-p1, and the number of pilot subcarriers can be p1, where p1 is an integer less than 2.

[0131] It should be noted that p1 can be 0. That is, for a 26-tone RU, the number of pilot subcarriers can be 0, and the number of data subcarriers can be 26.

[0132] For another example, when the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers in a 52-tone RU is 52-p2, and the number of pilot subcarriers is p2, where p2 is an integer less than 4. p2 can be 0.

[0133] It should be noted that p2 can be 0. That is, for a 52-tone RU, the number of pilot subcarriers can be 0, and the number of data subcarriers can be 52.

[0134] For another example, when the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers in a 106-tone RU may be 106-p3, and the number of pilot subcarriers may be p3, where p3 is an integer less than 4. p3 may be 0.

[0135] It should be noted that p3 can be 0. That is, for a 106-tone RU, the number of pilot subcarriers can be 0, and the number of data subcarriers can be 106.

[0136] For another example, when the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers in a 242-tone RU may be 242-p4, and the number of pilot subcarriers may be p4, where p4 is an integer less than 8. p4 may be 0.

[0137] It should be noted that p4 can be 0. That is, for a 242-tone RU, the number of pilot subcarriers can be 0, and the number of data subcarriers can be 242.

[0138] For another example, when the channel bandwidth of the second link is m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers in a 484-tone RU may be 484-p5, and the number of pilot subcarriers may be p5, where p5 is an integer less than 16. p5 may be 0.

[0139] It should be noted that p5 can be 0. That is, for a 484-tone RU, the number of pilot subcarriers can be 0, and the number of data subcarriers can be 484.

[0140] For another example, when the channel bandwidth of the second link is m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers in a 996-tone RU may be 996-p6, and the number of pilot subcarriers may be p6, where p6 is an integer less than 16. p6 may be 0.

[0141] It should be noted that p6 can be 0. That is, for a 996-tone RU, the number of pilot subcarriers can be 0, and the number of data subcarriers can be 996.

[0142] For another example, when the channel bandwidth of the second link is m*160 MHz or m*320 MHz, the number of data subcarriers in a 2*996-tone RU may be 2*996-p7, and the number of pilot subcarriers may be p7, where p7 is an integer less than 32. p7 may be 0.

[0143] It should be noted that p7 can be 0. That is, for a 2*996-tone RU, the number of pilot subcarriers can be 0, and the number of data subcarriers can be 2*996.

[0144] For another example, when the channel bandwidth of the second link is m*320 MHz, the number of data subcarriers in a 4*996-tone RU may be 4*996-p8, and the number of pilot subcarriers may be p8, where p8 is an integer less than 64. p8 may be 0.

[0145] It should be noted that p8 can be 0. That is, for a 4*996-tone RU, the number of pilot subcarriers can be 0, and the number of data subcarriers can be 4*996.

[0146] The method shown in Figure 3 can also be performed by a second device. The second device can be an MLD communicating with the first device. For example, the second device can include an AP MLD or a non-AP MLD. For example, the first device can be an AP MLD, and the second device can be a non-AP MLD. In another example, the first device can be a non-AP MLD, and the second device can be an AP MLD. In another example, both the first device and the second device can be non-AP MLDs.

[0147] The method shown in FIG3 may further include step S320.

[0148] Step S320: The first device sends a first field to the second device.

[0149] In some embodiments, the first field may be used to indicate whether the first device performs the first operation according to the first information. In other words, the first field may indicate whether the first device uses the "low frequency compensation high frequency" technical solution provided in this application to perform phase noise estimation and / or correction.

[0150] This application does not limit the indication method of the first field. Exemplarily, the first field may include a first bit. For example, if the value of the first bit is 0, the first bit may indicate that the first device performs the first operation according to the first information; if the value of the first bit is 1, the first bit may indicate that the first device does not perform the first operation according to the first information. Alternatively, if the value of the first bit is 1, the first bit may indicate that the first device performs the first operation according to the first information; if the value of the first bit is 0, the first bit may indicate that the first device does not perform the first operation according to the first information.

[0151] It should be noted that if the first device does not perform the first operation based on the first information, the first device may perform the first operation based on the pilot subcarrier, that is, use the phase noise estimation algorithm based on the pilot subcarrier in the related technology, or the first device may implement phase noise estimation based on other algorithms, and this application does not impose any restrictions on this.

[0152] In some embodiments, the first field may be used to indicate the tone plan of the second link.

[0153] Optionally, the first field may be used to indicate whether the first device uses the tone plan provided in the embodiment of the present application. For example, the first field may be used to indicate whether the tone plan of the second link corresponds to the tone plan with a channel bandwidth of M. For another example, the first field may be used to indicate whether the first number is less than the second number.

[0154] Exemplarily, the first field may include a second bit. For example, if the value of the second bit is 0, the second bit may indicate that the first device uses the tone plan provided in the embodiment of the present application; if the value of the second bit is 1, the second bit may indicate that the first device does not use the tone plan provided in the embodiment of the present application. Alternatively, if the value of the second bit is 1, the second bit may indicate that the first device uses the tone plan provided in the embodiment of the present application; if the value of the second bit is 0, the second bit may indicate that the first device does not use the tone plan provided in the embodiment of the present application.

[0155] Exemplarily, the first field may include a third bit. For example, if the value of the third bit is 0, the first number is less than the second number; if the value of the third bit is 1, the first number is not less than the second number. Alternatively, if the value of the third bit is 1, the first number is less than the second number; if the value of the third bit is 0, the first number is not less than the second number.

[0156] In some embodiments, considering the content indicated by the first field, the first field may also be referred to as a PN estimation mode field, etc.

[0157] In some embodiments, the first field may be located in a preamble of a PPDU. The following description will be made using an example where the first field is located in a preamble of a UHR PPDU.

[0158] The UHR PPDU may include two formats: UHR MU PPDU and UHR TB PPDU.

[0159] 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, L-LTF, L-SIG, RL-SIG, a universal signal field (U-SIG), a UHR-SIG, a UHR-STF, a UHR-LTF, data, and a packet extension field (PE).

[0160] 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 pre-UHR modulated fields. The UHR-STF, UHR-LTF, data, and PE fields may be referred to as UHR modulated fields.

[0161] The UHR TB PPDU format can be used to transmit in response to a trigger frame from an AP. Figure 5B is an example of a UHR TB PPDU format. As shown in Figure 5B, the 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.

[0162] 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 pre-UHR modulation fields. The UHR-STF, UHR-LTF, data, and PE fields are referred to as UHR modulation fields.

[0163] The duration of the UHR-STF field in the UHR TB PPDU can be twice the duration of the UHR-STF field in the UHR MU PPDU. For the UHR PPDU, each UHR-LTF symbol and each data symbol can have the same GI duration. For example, the GI duration can be 0.8μs, 1.6μs, or 3.2μs, respectively. The UHR-LTF symbols included in the UHR-LTF field can include three types: 1x UHR-LTF symbol, 2x UHR-LTF symbol, and 4x UHR-LTF symbol. The duration without GI of each 1x UHR-LTF symbol, 2x UHR-LTF symbol, and 4x UHR-LTF symbol can be 3.2μs, 6.4μs, and 12.8μs, respectively. The data symbol without GI can be 12.8μs.

[0164] In some embodiments, the first field may be located in a signal (SIG) field of the preamble. The signal field may include, for example, a U-SIG field and / or a UHR-SIG field.

[0165] FIG6 is a schematic diagram of packet error rate (PER) simulation using the “low frequency compensates high frequency” technical solution of the embodiment of the present application. In FIG6, MCS=13, fc high =6GHz, fc low =5GHz,BW HF =20MHz,BW LF =20MHz. Using the same channel model, the CPE estimation information at the lower channel center frequency is first calculated. When performing phase correction at the higher channel center frequency, the CPE estimation information at the higher channel center frequency is obtained according to the method provided in this application and applied to the high-frequency symbol phase noise correction method.

[0166] In Figure 6, the curve "without LPN compensation" is the high-frequency symbol packet error rate curve after direct phase noise estimation and correction (that is, without using the technical solution provided by the present application, for example, obtained by using the pilot phase tracking technology), and the curve "with LPN compensation" is the packet error rate curve after the high-frequency symbol phase noise correction provided by the embodiment of the present application. It can be seen from the observation results shown in Figure 6 that the solution proposed in the present application is effective, and the estimation accuracy is more accurate under the condition of a larger signal-to-noise ratio (SNR). There are many factors that affect the packet error rate, and correct phase noise estimation and correction are only a small part of them. Therefore, the impact of phase noise on the packet error rate will not play a decisive role. The technical solution proposed in the present application can obtain approximately the same packet error rate, which proves the effectiveness of this low-frequency compensation high-frequency algorithm.

[0167] 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.

[0168] FIG7 is a schematic structural diagram of a communication device 700 provided in an embodiment of the present application. The communication device 700 may be a first device and may include an execution unit 710.

[0169] The execution unit 710 can be used to perform a first operation based on the first information; wherein, the first device receives signals through the first link and the second link, the channel center frequency of the first link is lower than the channel center frequency of the second link, the first information is related to the phase noise information of the first link, and the first operation is related to the phase noise of the second link.

[0170] In an optional embodiment, the execution unit 710 may be a processor 910. The communication device 700 may further include a memory 920 and a transceiver 930, as specifically shown in FIG9 .

[0171] FIG8 is a schematic structural diagram of a communication device 800 provided in an embodiment of the present application. The communication device 800 may be a second device and may include a receiving unit 810.

[0172] The receiving unit 810 can be used to receive a first field sent by a first device; wherein the first device receives signals through a first link and a second link, the channel center frequency of the first link is lower than the channel center frequency of the second link, the first information is related to the phase noise information of the first link, and the first operation is related to the phase noise of the second link; the first field is used to indicate one or more of the following information: whether the first device performs the first operation according to the first information; subcarrier planning of the second link.

[0173] In an optional embodiment, the receiving unit 810 may be a transceiver 930. The communication device 800 may further include a processor 910 and a memory 920, as specifically shown in FIG9 .

[0174] Figure 9 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 9 indicate that the unit or module is optional. The device 900 can be used to implement the method described in the above method embodiment. The device 900 can be a chip or a communication device.

[0175] The device 900 may include one or more processors 910. The processor 910 may support the device 900 to implement the method described in the method embodiment above. The processor 910 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.

[0176] The apparatus 900 may further include one or more memories 920. The memories 920 store programs that can be executed by the processor 910, causing the processor 910 to perform the methods described in the above method embodiments. The memories 920 may be independent of the processor 910 or integrated into the processor 910.

[0177] The apparatus 900 may further include a transceiver 930. The processor 910 may communicate with other devices or chips via the transceiver 930. For example, the processor 910 may transmit and receive data with other devices or chips via the transceiver 930.

[0178] 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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).

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] 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."

[0189] 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.

[0190] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the field of communications, for example, it may include a Wi-Fi protocol and related protocols used in future Wi-Fi communication systems, and the present application does not limit this.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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)).

[0195] 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 method for communication, characterized in that include: The first device performs a first operation according to the first information; The first device receives signals through a first link and a second link, a channel center frequency of the first link is lower than a channel center frequency of the second link, the first information is related to phase noise information of the first link, and the first operation is related to the phase noise of the second link.

2. The method according to claim 1, characterized in that The carrier corresponding to the first link and the carrier corresponding to the second link share a crystal oscillator.

3. The method according to claim 1 or 2, characterized in that: The first operation includes one or more of the following: estimating a phase noise of the second link; The phase is corrected based on the phase noise of the second link.

4. The method according to claim 3, characterized in that The estimating the phase noise of the second link comprises: determining a first matrix of the second link; The first matrix is ​​related to a phase noise reference matrix of the second link.

5. The method according to claim 4, characterized in that The first matrix satisfies: Among them, CPE HF Represents the first matrix, CPE LF represents the phase noise reference matrix of the first link, a is related to the channel bandwidth of the first link and / or the channel bandwidth of the second link, b and c are other parameters that affect the phase noise estimation, and fc low represents the channel center frequency of the first link, fc high represents the channel center frequency of the second link.

6. The method according to claim 4 or 5, characterized in that: aSatisfies: Among them, BW LF represents the channel bandwidth of the first link, BW HF represents the channel bandwidth of the second link, and m is a multiplication parameter.

7. The method according to claims 4-6, characterized in that: The phase noise reference matrix of the second link is obtained by interpolating the first matrix.

8. The method according to any one of claims 1 to 7, characterized in that: The first information includes a phase noise estimation result of the first link.

9. The method according to claim 8, characterized in that The phase noise estimation result of the first link is obtained based on the pilot subcarrier of the first link.

10. The method according to any one of claims 1 to 9, characterized in that The phase noise includes a common phase error.

11. The method according to any one of claims 1 to 10, characterized in that The first operation is also performed based on one or more of the following information: a channel bandwidth of the first link; a channel bandwidth of the second link; a channel center frequency of the first link; The channel center frequency of the second link.

12. The method according to any one of claims 1 to 11, characterized in that The first information is determined by a first physical layer protocol data unit PPDU transmitted by the first link, the first operation is related to a phase noise of a second PPDU transmitted by the second link, and the first PPDU and the second PPDU are sent simultaneously.

13. The method according to any one of claims 1 to 12, characterized in that When the channel bandwidth of the second link is m×M, the subcarrier planning of the second link corresponds to the subcarrier planning when the channel bandwidth is M, where m is a multiplication parameter.

14. The method according to claim 13, characterized in that In the subcarrier planning of the second link, the number of pilot subcarriers in the first type of subcarrier resource unit is a first number, and in the subcarrier planning of the channel bandwidth being M, the number of pilot subcarriers in the subcarrier resource unit of the first type is a second number, and The first number is smaller than the second number.

15. The method according to claim 13 or 14, characterized in that The subcarrier planning of the second link satisfies one or more of the following: When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 26-channel resource unit is 26-p1, and the number of pilot subcarriers is p1, where p1 is an integer less than 2; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 52-channel resource unit is 52-p2, and the number of pilot subcarriers is p2, where p2 is an integer less than 4; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 106-channel resource unit is 106-p3, and the number of pilot subcarriers is p3, where p3 is an integer less than 4; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 242-channel resource unit is 242-p4, and the number of pilot subcarriers is p4, where p4 is an integer less than 8; When the channel bandwidth of the second link is m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 484-channel resource unit is 484-p5, and the number of pilot subcarriers is p5, where p5 is an integer less than 16; When the channel bandwidth of the second link is m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 996-channel resource unit is 996-p6, and the number of pilot subcarriers is p6, where p6 is an integer less than 16; When the channel bandwidth of the second link is m*160 MHz or m*320 MHz, the number of data subcarriers of the 2*996-channel resource unit is 2*996-p7, and the number of pilot subcarriers is p7, where p7 is an integer less than 32; When the channel bandwidth of the second link is m*320 MHz, the number of data subcarriers of the 4*996-channel resource unit is 4*996-p8, and the number of pilot subcarriers is p8, where p8 is an integer less than 64.

16. The method according to any one of claims 1 to 15, characterized in that Also includes: The first device sends a first field; The first field is used to indicate one or more of the following information: whether the first device performs the first operation according to the first information; Subcarrier planning of the second link.

17. The method according to claim 16, characterized in that The first field is located in the preamble of the PPDU.

18. The method according to claim 17, characterized in that The first field is located in a universal signal U-SIG field and / or an ultra high reliability signal UHR-SIG field.

19. A method for communication, characterized in that include: The second device receives the first field sent by the first device; The first device receives a signal through a first link and a second link, a channel center frequency of the first link is lower than a channel center frequency of the second link, the first information is related to phase noise information of the first link, and the first operation is related to phase noise of the second link; The first field is used to indicate one or more of the following information: whether the first device performs the first operation according to the first information; Subcarrier planning of the second link.

20. The method according to claim 19, characterized in that The carrier corresponding to the first link and the carrier corresponding to the second link share a crystal oscillator.

21. The method according to claim 19 or 20, characterized in that The first operation includes one or more of the following: estimating a phase noise of the second link; The phase is corrected based on the phase noise of the second link.

22. The method according to claim 21, characterized in that The estimating the phase noise of the second link comprises: determining a first matrix of the second link; The first matrix is ​​related to a phase noise reference matrix of the second link.

23. The method according to claim 22, characterized in that The first matrix satisfies: Among them, CPE HF Represents the first matrix, CPE LF represents the phase noise reference matrix of the first link, a is related to the channel bandwidth of the first link and / or the channel bandwidth of the second link, b and c are other parameters that affect the phase noise estimation, and fc low represents the channel center frequency of the first link, fc high represents the channel center frequency of the second link.

24. The method according to claim 22 or 23, characterized in that aSatisfies: Among them, BW LF represents the channel bandwidth of the first link, BW HF represents the channel bandwidth of the second link, and m is a multiplication parameter.

25. The method according to claims 22-24, characterized in that The phase noise reference matrix of the second link is obtained by interpolating the first matrix.

26. The method according to any one of claims 19 to 25, characterized in that: The first information includes a phase noise estimation result of the first link.

27. The method according to claim 26, characterized in that The phase noise estimation result of the first link is obtained based on the pilot subcarrier of the first link.

28. The method according to any one of claims 19 to 27, characterized in that The phase noise includes a common phase error.

29. The method according to any one of claims 19 to 28, characterized in that The first operation is also performed based on one or more of the following information: a channel bandwidth of the first link; a channel bandwidth of the second link; a channel center frequency of the first link; The channel center frequency of the second link.

30. The method according to any one of claims 19 to 29, characterized in that The first information is determined by a first physical layer protocol data unit PPDU transmitted by the first link, the first operation is related to a phase noise of a second PPDU transmitted by the second link, and the first PPDU and the second PPDU are sent simultaneously.

31. The method according to any one of claims 19 to 30, characterized in that When the channel bandwidth of the second link is m×M, the subcarrier planning of the second link corresponds to the subcarrier planning when the channel bandwidth is M, where m is a multiplication parameter.

32. The method according to claim 31, characterized in that In the subcarrier planning of the second link, the number of pilot subcarriers in the first type of subcarrier resource unit is a first number, and in the subcarrier planning with a channel bandwidth of M, the number of pilot subcarriers in the first type of subcarrier resource unit is a second number, and the first number is less than the second number.

33. The method according to claim 31 or 32, characterized in that The subcarrier planning of the second link satisfies one or more of the following: When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 26-channel resource unit is 26-p1, and the number of pilot subcarriers is p1, where p1 is an integer less than 2; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 52-channel resource unit is 52-p2, and the number of pilot subcarriers is p2, where p2 is an integer less than 4; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 106-channel resource unit is 106-p3, and the number of pilot subcarriers is p3, where p3 is an integer less than 4; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 242-channel resource unit is 242-p4, and the number of pilot subcarriers is p4, where p4 is an integer less than 8; When the channel bandwidth of the second link is m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 484-channel resource unit is 484-p5, and the number of pilot subcarriers is p5, where p5 is an integer less than 16; When the channel bandwidth of the second link is m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 996-channel resource unit is 996-p6, and the number of pilot subcarriers is p6, where p6 is an integer less than 16; When the channel bandwidth of the second link is m*160MHz or m*320MHz, the number of data subcarriers in the 2*996-channel resource unit is 2*996-p7, the number of pilot subcarriers is p7, and p7 is an integer less than 32; When the channel bandwidth of the second link is m*320 MHz, the number of data subcarriers of the 4*996-channel resource unit is 4*996-p8, and the number of pilot subcarriers is p8, where p8 is an integer less than 64.

34. The method according to any one of claims 19 to 33, characterized in that The first field is located in the preamble of the PPDU.

35. The method according to any one of claims 19 to 34, characterized in that The first field is located in a universal signal U-SIG field and / or an ultra high reliability signal UHR-SIG field.

36. A communication device, characterized in that: The communication device is a first device, and the communication device includes: An execution unit, configured to execute a first operation according to the first information; The first device receives signals through a first link and a second link, a channel center frequency of the first link is lower than a channel center frequency of the second link, the first information is related to phase noise information of the first link, and the first operation is related to the phase noise of the second link.

37. The communication device according to claim 36, characterized in that The carrier corresponding to the first link and the carrier corresponding to the second link share a crystal oscillator.

38. The communication device according to claim 36 or 37, characterized in that: The first operation includes one or more of the following: estimating a phase noise of the second link; The phase is corrected based on the phase noise of the second link.

39. The communication device according to claim 38, characterized in that The estimating the phase noise of the second link comprises: determining a first matrix of the second link; The first matrix is ​​related to a phase noise reference matrix of the second link.

40. The communication device according to claim 39, characterized in that The first matrix satisfies: Among them, CPE HF Represents the first matrix, CPE LF represents the phase noise reference matrix of the first link, a is related to the channel bandwidth of the first link and / or the channel bandwidth of the second link, b and c are other parameters that affect the phase noise estimation, and fc low represents the channel center frequency of the first link, fc high represents the channel center frequency of the second link.

41. The communication device according to claim 39 or 40, characterized in that: aSatisfies: Among them, BW LF represents the channel bandwidth of the first link, BW HF represents the channel bandwidth of the second link, and m is a multiplication parameter.

42. The communication device according to claims 39-41, characterized in that: The phase noise reference matrix of the second link is obtained by interpolating the first matrix.

43. The communication device according to any one of claims 36 to 42, characterized in that: The first information includes a phase noise estimation result of the first link.

44. The communication device according to claim 43, characterized in that The phase noise estimation result of the first link is obtained based on the pilot subcarrier of the first link.

45. The communication device according to any one of claims 36 to 44, characterized in that: The phase noise includes a common phase error.

46. ​​The communication device according to any one of claims 36 to 45, characterized in that: The first operation is also performed based on one or more of the following information: a channel bandwidth of the first link; a channel bandwidth of the second link; a channel center frequency of the first link; The channel center frequency of the second link.

47. The communication device according to any one of claims 36 to 46, characterized in that: The first information is determined by a first physical layer protocol data unit PPDU transmitted by the first link, the first operation is related to a phase noise of a second PPDU transmitted by the second link, and the first PPDU and the second PPDU are sent simultaneously.

48. The communication device according to any one of claims 36 to 47, characterized in that: When the channel bandwidth of the second link is m×M, the subcarrier planning of the second link corresponds to the subcarrier planning when the channel bandwidth is M, where m is a multiplication parameter.

49. The communication device according to claim 48, characterized in that In the subcarrier planning of the second link, the number of pilot subcarriers in the first type of subcarrier resource unit is a first number, and in the subcarrier planning with a channel bandwidth of M, the number of pilot subcarriers in the first type of subcarrier resource unit is a second number, and the first number is less than the second number.

50. The communication device according to claim 48 or 49, characterized in that: The subcarrier planning of the second link satisfies one or more of the following: When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 26-channel resource unit is 26-p1, and the number of pilot subcarriers is p1, where p1 is an integer less than 2; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 52-channel resource unit is 52-p2, and the number of pilot subcarriers is p2, where p2 is an integer less than 4; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 106-channel resource unit is 106-p3, and the number of pilot subcarriers is p3, where p3 is an integer less than 4; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 242-channel resource unit is 242-p4, and the number of pilot subcarriers is p4, where p4 is an integer less than 8; When the channel bandwidth of the second link is m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 484-channel resource unit is 484-p5, and the number of pilot subcarriers is p5, where p5 is an integer less than 16; When the channel bandwidth of the second link is m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 996-channel resource unit is 996-p6, and the number of pilot subcarriers is p6, where p6 is an integer less than 16; When the channel bandwidth of the second link is m*160 MHz or m*320 MHz, the number of data subcarriers of the 2*996-channel resource unit is 2*996-p7, and the number of pilot subcarriers is p7, where p7 is an integer less than 32; When the channel bandwidth of the second link is m*320 MHz, the number of data subcarriers of the 4*996-channel resource unit is 4*996-p8, and the number of pilot subcarriers is p8, where p8 is an integer less than 64.

51. The communication device according to any one of claims 36 to 50, characterized in that: The communication device is also used for: Send the first field; The first field is used to indicate one or more of the following information: whether the first device performs the first operation according to the first information; Subcarrier planning of the second link.

52. The communication device according to claim 51, characterized in that The first field is located in the preamble of the PPDU.

53. The communication device according to claim 52, characterized in that The first field is located in a universal signal U-SIG field and / or an ultra high reliability signal UHR-SIG field.

54. 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 field sent by a first device; The first device receives a signal through a first link and a second link, a channel center frequency of the first link is lower than a channel center frequency of the second link, the first information is related to phase noise information of the first link, and the first operation is related to phase noise of the second link; The first field is used to indicate one or more of the following information: whether the first device performs the first operation according to the first information; Subcarrier planning of the second link.

55. The communication device according to claim 54, characterized in that The carrier corresponding to the first link and the carrier corresponding to the second link share a crystal oscillator.

56. The communication device according to claim 54 or 55, characterized in that: The first operation includes one or more of the following: estimating a phase noise of the second link; The phase is corrected based on the phase noise of the second link.

57. The communication device according to claim 56, characterized in that The estimating the phase noise of the second link comprises: determining a first matrix of the second link; The first matrix is ​​related to a phase noise reference matrix of the second link.

58. The communication device according to claim 57, characterized in that The first matrix satisfies: Among them, CPE HF Represents the first matrix, CPE LF represents the phase noise reference matrix of the first link, a is related to the channel bandwidth of the first link and / or the channel bandwidth of the second link, b and c are other parameters that affect the phase noise estimation, and fc low represents the channel center frequency of the first link, fc high represents the channel center frequency of the second link.

59. The communication device according to claim 57 or 58, characterized in that aSatisfies: Among them, BW LF represents the channel bandwidth of the first link, BW HF represents the channel bandwidth of the second link, and m is a multiplication parameter.

60. The communication device according to claims 57-59, characterized in that The phase noise reference matrix of the second link is obtained by interpolating the first matrix.

61. The communication device according to any one of claims 54 to 60, characterized in that: The first information includes a phase noise estimation result of the first link.

62. The communication device according to claim 61, characterized in that The phase noise estimation result of the first link is obtained based on the pilot subcarrier of the first link.

63. The communication device according to any one of claims 54 to 62, characterized in that: The phase noise includes a common phase error.

64. The communication device according to any one of claims 54 to 63, characterized in that: The first operation is also performed based on one or more of the following information: a channel bandwidth of the first link; a channel bandwidth of the second link; a channel center frequency of the first link; The channel center frequency of the second link.

65. The communication device according to any one of claims 54 to 64, characterized in that: The first information is determined by a first physical layer protocol data unit PPDU transmitted by the first link, the first operation is related to a phase noise of a second PPDU transmitted by the second link, and the first PPDU and the second PPDU are sent simultaneously.

66. The communication device according to any one of claims 54 to 65, characterized in that: When the channel bandwidth of the second link is m×M, the subcarrier planning of the second link corresponds to the subcarrier planning when the channel bandwidth is M, where m is a multiplication parameter.

67. The communication device according to claim 66, characterized in that In the subcarrier planning of the second link, the number of pilot subcarriers in the first type of subcarrier resource unit is a first number, and in the subcarrier planning with a channel bandwidth of M, the number of pilot subcarriers in the first type of subcarrier resource unit is a second number, and the first number is less than the second number.

68. The communication device according to claim 66 or 67, characterized in that: The subcarrier planning of the second link satisfies one or more of the following: When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 26-channel resource unit is 26-p1, and the number of pilot subcarriers is p1, where p1 is an integer less than 2; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 52-channel resource unit is 52-p2, and the number of pilot subcarriers is p2, where p2 is an integer less than 4; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 106-channel resource unit is 106-p3, and the number of pilot subcarriers is p3, where p3 is an integer less than 4; When the channel bandwidth of the second link is m*20 MHz, m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 242-channel resource unit is 242-p4, and the number of pilot subcarriers is p4, where p4 is an integer less than 8; When the channel bandwidth of the second link is m*40 MHz, m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 484-channel resource unit is 484-p5, and the number of pilot subcarriers is p5, where p5 is an integer less than 16; When the channel bandwidth of the second link is m*80 MHz, m*160 MHz, or m*320 MHz, the number of data subcarriers of the 996-channel resource unit is 996-p6, and the number of pilot subcarriers is p6, where p6 is an integer less than 16; When the channel bandwidth of the second link is m*160 MHz or m*320 MHz, the number of data subcarriers of the 2*996-channel resource unit is 2*996-p7, and the number of pilot subcarriers is p7, where p7 is an integer less than 32; When the channel bandwidth of the second link is m*320 MHz, the number of data subcarriers of the 4*996-channel resource unit is 4*996-p8, and the number of pilot subcarriers is p8, where p8 is an integer less than 64.

69. The communication device according to any one of claims 54 to 68, characterized in that: The first field is located in the preamble of the PPDU.

70. The communication device according to any one of claims 54 to 69, characterized in that: The first field is located in a universal signal U-SIG field and / or an ultra high reliability signal UHR-SIG field.

71. A communication device, characterized in that: The device comprises a memory and a processor, wherein 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 to 35.

72. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to cause the device to execute a method as claimed in any one of claims 1 to 35.

73. 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 35.

74. 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 35.

75. A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 35.

76. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 35.

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