Communication method and communication apparatus

Abstract

A communication method, comprises: a first communication device determines first indication information indicating Q1 activated subcarrier groups among Q subcarrier groups corresponding to a first symbol, and sends the first indication information to a second communication device. The Q subcarrier groups are subcarrier groups formed by dividing subcarriers other than a plurality of first subcarriers in the first symbol, each subcarrier group comprising a plurality of second subcarriers, the plurality of first subcarriers respectively carrying a plurality of first pilots, the Q1 subcarrier groups carrying frequency domain signals obtained by performing DFT conversion on data signals, and the plurality of first subcarriers being uniformly distributed at intervals in the frequency domain, where P, Q1 and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer smaller than Q. Indicating the Q1 activated subcarrier groups among the Q subcarrier groups in the first symbol can improve the PAPR of the first symbol, thereby improving the channel estimation performance.

Description

Communication methods and communication devices

[0001] This application claims priority to Chinese Patent Application No. 202410484006.4, filed on April 22, 2024, entitled "Communication Method and Communication Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more specifically, to a communication method and a communication device. Background Technology

[0003] Single-carrier technology has the advantage of a lower peak-to-average power ratio (PAPR) compared to multi-carrier technology (such as orthogonal frequency division multiplexing, OFDM). Among them, discrete Fourier transform spreading OFDM (DFT-s-OFDM) is a single-carrier technology based on OFDM waveforms.

[0004] One grouped DFT-s-OFDM scheme involves dividing the data signal into multiple data signal groups, which may be assigned to different terminal devices. Each data signal group undergoes an independent Discrete Fourier Transform (DFT) to obtain multiple frequency domain signal groups. These frequency domain signal groups are then mapped to subcarriers in the frequency domain at equal intervals. After multiplexing the signals from all frequency domain signal groups, a reverse Fast Fourier Transform (IFFT) is performed before transmission. This DFT-s-OFDM scheme maintains that each data signal group is a single-carrier waveform, thus preserving the low PAPR (Packet Appearance Rate) characteristic of single-carrier waveforms. However, further reducing PAPR remains a pressing issue. Summary of the Invention

[0005] This application provides a communication method aimed at further reducing PAPR.

[0006] Firstly, a communication method is provided. This method can be executed by a first communication device. Unless otherwise specified, the "first communication device" in this application can refer to the first communication device itself (e.g., a network device), a component within the first communication device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the first communication device. For ease of description, the following description uses execution by a first communication device as an example.

[0007] The communication method includes: determining first indication information, the first indication information being used to indicate the activated Q1 subcarrier groups in the Q subcarrier groups corresponding to the first symbol; transmitting the first indication information, wherein the Q subcarrier groups are subcarrier groups divided from the subcarriers in the first symbol excluding multiple first subcarriers, each subcarrier group including multiple second subcarriers, the multiple first subcarriers respectively carrying multiple first pilots, the Q1 subcarrier groups carrying frequency domain signals, the frequency domain signals being obtained from data signals through DFT transformation, the interval between the Pth first subcarrier and the (P+1)th first subcarrier being X second subcarriers, where P, Q1, and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q.

[0008] Optionally, the first symbol mentioned above can be a DFT-s-OFDM symbol. Alternatively, the first symbol can be any other symbol with low single-carrier PAPR characteristics, and this application does not limit this.

[0009] Based on the above technical solution, the first communication device can indicate the activation of Q1 subcarrier groups in the first symbol through the first indication information. These Q1 activated subcarrier groups carry frequency domain signals, and are a portion of the Q subcarrier groups corresponding to the first symbol. Specifically, the subcarriers corresponding to the first symbol, excluding the multiple first subcarriers used to carry pilot signals, are divided into Q subcarrier groups. Each of these Q subcarrier groups includes multiple second subcarriers. These second subcarriers can carry frequency domain signals, but the first communication device, through the first indication information, indicates the activation of the Q1 subcarrier groups. Frequency domain signals are mapped onto these Q1 subcarrier groups, while the frequency domain signals mapped onto the Q1 subcarrier groups, excluding the activated Q1 subcarrier groups, are 0. This improves the PAPR of the first symbol and enhances channel estimation performance.

[0010] In addition, the pilot and data signals in the first symbol are transformed by DFT to obtain frequency domain signals for frequency division transmission, which can reduce the interference between the pilot and data signals and further improve the channel estimation performance.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the second subcarrier of the Pth term and the second subcarrier of the P+1th term in the first subcarrier group are spaced apart by X1 subcarriers, the first subcarrier group is one of the Q subcarrier groups, and X1 is a positive integer.

[0012] Based on the above technical solution, the multiple second subcarriers included in each of the Q subcarrier groups are evenly spaced in the frequency domain, which can further improve the PAPR of the first symbol.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the P second subcarriers and the (P+1)th second subcarrier in the second subcarrier group are spaced apart by X2 subcarriers, and the second subcarrier group is one of the Q subcarrier groups other than the first subcarrier group, wherein X2 and X1 are equal or unequal.

[0014] Based on the above technical solution, the number of second subcarriers included in different subcarrier groups in Q subcarrier groups can be the same or different, improving the flexibility of grouping.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: sending second indication information, the second indication information being used to indicate the pattern of the plurality of first subcarriers.

[0016] Based on the above technical solution, the first communication device can indicate the pattern of the first subcarrier to the second communication device through the second indication information, so that the first and second communication devices can reach a consensus on the position of the subcarrier that can carry the pilot signal, and support the second communication device to correctly parse the received first symbol.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the second indication information is used to indicate the density of the plurality of first subcarriers and the position of the first first subcarrier among the plurality of first subcarriers in the frequency domain resources.

[0018] In conjunction with the first aspect, in certain implementations of the first aspect, the second indication information indicates the density of the plurality of first subcarriers, including: the second indication information indicates 1 / X-1 and / or X.

[0019] Based on the above technical solution, the second indication information can indicate the pattern of the first subcarrier by indicating different information, thereby improving the flexibility of the solution.

[0020] In conjunction with the first aspect, in some implementations of the first aspect, the first indication information indicates the position of the Q1 subcarrier groups in the Q subcarrier groups.

[0021] Based on the above technical solution, the first indication information can indicate the position of Q1 subcarrier groups in the Q subcarrier groups, thereby achieving the purpose of indicating Q1 subcarrier groups in the Q subcarrier groups.

[0022] In conjunction with the first aspect, in certain implementations of the first aspect, the position of the Q1 subcarrier groups in the Q subcarrier groups is associated with at least one of the following: the identifier of the terminal device, the identifier of the cell, the index of the first symbol, the index of the time slot, the index of the subframe, the index of the frame, or the identifier of the partial bandwidth BWP.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, the size of Q1 is related to at least one of the following parameters: the size of N, the size of Q, the modulation order, or the PAPR value of the first pilot sequence, wherein N is the number of symbols carrying the pilot.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: configuring a first energy for the plurality of first subcarriers, and configuring a second energy for the Q1 subcarrier groups, wherein the ratio between the first energy and the second energy is a preset value or a value related to Q1.

[0025] Secondly, a communication method is provided. This method can be executed by a second communication device. Unless otherwise specified, the "second communication device" in this application can refer to the second communication device itself (e.g., a terminal device), a component within the second communication device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the second communication device. For ease of description, the following description uses execution by a second communication device as an example.

[0026] The communication method includes: receiving first indication information, the first indication information being used to indicate the activated Q1 subcarrier groups in the Q subcarrier groups corresponding to a first symbol; demodulating the first symbol according to the first indication information, wherein the Q subcarrier groups are subcarrier groups divided from the subcarriers of the first symbol excluding multiple first subcarriers, each subcarrier group including multiple second subcarriers, the multiple first subcarriers respectively carrying multiple first pilots, the Q1 subcarrier groups carrying frequency domain signals, the frequency domain signals being obtained from data signals through DFT transformation, the interval between the Pth first subcarrier and the (P+1)th first subcarrier being X second subcarriers, where P, Q1, and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q.

[0027] In conjunction with the second aspect, in some implementations of the second aspect, the Pth second subcarrier and the (P+1)th second subcarrier in the first subcarrier group are spaced apart by X1 subcarriers, the first subcarrier group is one of the Q subcarrier groups, and X1 is a positive integer.

[0028] In conjunction with the second aspect, in some implementations of the second aspect, the P second subcarriers and the P+1th second subcarrier in the second subcarrier group are spaced apart by X2 subcarriers, and the second subcarrier group is one of the Q subcarrier groups other than the first subcarrier group, wherein X2 and X1 are equal or unequal.

[0029] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: acquiring second indication information, the second indication information being used to indicate the pattern of the plurality of first subcarriers.

[0030] In conjunction with the second aspect, in some implementations of the second aspect, the second indication information is used to indicate the density of the plurality of first subcarriers and the position of the first first subcarrier among the plurality of first subcarriers in the frequency domain resources.

[0031] In conjunction with the second aspect, in certain implementations of the second aspect, the second indication information indicates the density of the plurality of first subcarriers, including: the first indication information indicates 1 / X-1 and / or X.

[0032] In conjunction with the second aspect, in some implementations of the second aspect, the first indication information indicates the position of the Q1 subcarrier groups within the Q subcarrier groups.

[0033] In conjunction with the second aspect, in some implementations of the second aspect, the position of the Q1 subcarrier groups in the Q subcarrier groups is associated with at least one of the following: the identifier of the terminal device, the identifier of the cell, the index of the first symbol, the index of the time slot, the index of the subframe, the index of the frame, or the identifier of the bandwidth part (BWP).

[0034] In conjunction with the second aspect, in some implementations of the second aspect, the size of Q1 is related to at least one of the following parameters:

[0035] The magnitude of N, the magnitude of Q, the modulation order, or the PAPR value of the first pilot sequence, wherein N is the number of symbols carrying the pilot.

[0036] The technical effects of the methods shown in the second aspect and its possible designs above can be referred to the technical effects in the first aspect and its possible designs.

[0037] Thirdly, a communication device is provided. The communication device is used to execute the first aspect described above and any of its embodiments. Specifically, the communication device includes a processor and a memory for storing a computer program; the processor is used to retrieve and run the computer program from the memory, causing the communication device to execute the first aspect described above and any of its embodiments.

[0038] In one implementation, the communication device is a network device. When the communication device is a network device, the transceiver unit can be a transceiver or an input / output interface. The processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0039] In another implementation, the communication device can be a chip, chip system, or circuit in a network device. In this case, the transceiver unit can be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; the processing unit can be at least one processor, processing circuit, or logic circuit.

[0040] Fourthly, a communication device is provided. The communication device is used to execute the second aspect described above and any of its embodiments. Specifically, the communication device includes a processor and a memory for storing a computer program; the processor is used to retrieve and run the computer program from the memory, causing the network device to execute the second aspect described above and any of its embodiments.

[0041] In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the transceiver unit can be a transceiver or an input / output interface. The processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0042] In another implementation, the communication device can be a chip, chip system, or circuit in a terminal device. In this case, the transceiver unit can be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; the processing unit can be at least one processor, processing circuit, or logic circuit.

[0043] Fifthly, a computer-readable storage medium is provided. This computer-readable storage medium stores a computer program that, when executed, causes the method of any implementation of the first and second aspects described above to be performed.

[0044] Sixthly, a computer program product containing instructions is provided. When the computer program product is run, it causes the method provided by any implementation of the first and second aspects above to be executed.

[0045] In a seventh aspect, a chip is provided, the chip including a processor and a communication interface, the processor reading instructions through the communication interface and executing the method provided by any of the implementations of the first and second aspects described above.

[0046] Optionally, as one implementation, the chip also includes a memory that stores computer programs or instructions, and a processor that executes the computer programs or instructions stored in the memory. When the computer programs or instructions are executed, the processor executes the method provided by any of the implementations of the first and second aspects described above.

[0047] Eighthly, a communication system is provided, including a communication device of the third aspect and a communication device of the fourth aspect.

[0048] Ninthly, a computer program is provided. When the computer program is run, it causes the method provided by any implementation of the first and second aspects above to be executed. Attached Figure Description

[0049] Figure 1 is a schematic diagram of a communication system applicable to this application.

[0050] Figure 2 is a schematic diagram of transmitting DFT-s-OFDM.

[0051] Figure 3 is a schematic diagram of frequency domain grouped DFT-s-OFDM.

[0052] Figure 4 is a schematic diagram of another type of frequency domain grouped DFT-s-OFDM.

[0053] Figure 5 is a schematic flowchart of a communication method provided in an embodiment of this application.

[0054] Figure 6(a) and (b) are schematic diagrams of the first symbol provided in the embodiments of this application.

[0055] Figure 7 is a schematic block diagram of a communication device provided in an embodiment of this application.

[0056] Figure 8 is a schematic diagram of another communication device provided in an embodiment of this application.

[0057] Figure 9 is a schematic diagram of a chip system provided in an embodiment of this application.

[0058] Figure 10 is a schematic diagram of another chip system provided in an embodiment of this application. Detailed Implementation

[0059] To facilitate understanding of the embodiments of this application, the following points will be explained first.

[0060] First, in this application, "for indicating" can include both direct and indirect indication. When describing an indication message as indicating A, it can include whether the indication message directly indicates A or indirectly indicates A, but does not necessarily mean that the indication message carries A.

[0061] The information indicated by the instruction is called the information to be instructed. In the specific implementation process, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index. It can also be indirectly indicated by indicating other information, where there is a relationship between the other information and the information to be instructed. It can also indicate only a part of the information to be indicated, while the other parts are known or pre-agreed upon. For example, the instruction of specific information can be achieved by using a pre-agreed (e.g., protocol-defined) arrangement of various pieces of information, thereby reducing instruction overhead to some extent. At the same time, common parts of various pieces of information can be identified and indicated uniformly to reduce the instruction overhead caused by individually indicating the same information.

[0062] Second, in this application, "at least one" refers to one or more, and "more than one" refers to two or more (including two). Furthermore, in the embodiments of this application, "first," "second," and various numerical designations (e.g., "#1," "#2," etc.) are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The sequence numbers of the processes below do not imply an order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. It should be understood that the objects described in this way can be interchanged where appropriate to describe solutions other than those in the embodiments of this application. Moreover, in the embodiments of this application, terms such as "S510" are merely identifiers for descriptive convenience and do not limit the order of execution steps.

[0063] Third, in the embodiments of this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0064] Fourth, the term "storage" in the embodiments of this application can refer to storage in one or more memories. These memories can be separate installations or integrated into an encoder, decoder, processor, or communication device. Alternatively, some memories can be separately installed, while others can be integrated into the decoder, processor, or communication device. The type of memory can be any form of storage medium, and this application does not limit this.

[0065] Fifth, in the implementation of this application, "protocol" may refer to standard protocols in the field of communications, such as the NR protocol and related protocols applied in future communication systems, and this application does not limit it.

[0066] Sixth, in the embodiments of this application, the terms "of", "corresponding (relevant)", "corresponding", and "associate" can sometimes be used interchangeably. It should be noted that when their differences are not emphasized, their intended meanings are consistent.

[0067] Seventh, in the embodiments of this application, "under the circumstances", "when", and "if" can sometimes be used interchangeably. It should be noted that when the distinction is not emphasized, their intended meanings are consistent.

[0068] Eighth, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0069] Ninth, in this article, "message", "information", or "information element (IE)" can be used interchangeably. There are no restrictions on the name of the message or information, as long as it can achieve the corresponding function.

[0070] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, and "send information" can include direct transmission or indirect transmission through other units or modules. "Receive information from YY" can be understood as the source of the information being YY, and "receive information" can include direct reception from YY or indirect reception from YY through other units or modules. Furthermore, "send" can also be understood as the "output" of a chip interface, and "receive" can be understood as the "input" of a chip interface. In other words, "send" or "receive" can occur between devices, such as network devices and terminal devices transmitting or receiving data via an air interface, or they can occur within a device, such as transmitting or receiving data between components, modules, chips, software modules, or hardware modules within a device via a bus, wiring, or interface.

[0071] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0072] The technical solutions of this application embodiment can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th Generation (5G) systems or new radio (NR) systems and future communication systems, vehicle-to-other devices (V2X), where V2X can include vehicle-to-network (V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), etc., Long Term Evolution-V (LTE-V) technology for vehicle-to-everything (V2X), vehicle-to-everything (V2X), machine-type communication (MTC), and Internet of Things (IoT). Things (IoT), Long Term Evolution of Machines (LTE-M), Machine to Machine (M2M), etc.

[0073] Figure 1 is a schematic diagram of a communication system applicable to this application. As shown in Figure 1, the communication system 100 includes at least one network device, such as network device 111, network device 112, and network device 113 shown in Figure 1. The wireless communication system may also include at least one terminal device, such as terminal device 121, terminal device 122, terminal device 123, terminal device 124, terminal device 125, terminal device 126, and terminal device 127 shown in Figure 1.

[0074] For example, network devices and terminal devices can communicate with each other, including but not limited to: multi-site transmission, enhanced mobile broadband (eMBB) transmission, etc. For example, network devices 112 and 113 shown in FIG1 can communicate with terminal device 124 through multi-site transmission. Also, network device 112 shown in FIG1 can communicate with terminal devices 121, 122 and 123 through eMBB transmission.

[0075] For example, network devices can also communicate with each other, including but not limited to: backhaul. As shown in FIG1, network device 111 and network device 112 can communicate through backhaul, and network device 111 and network device 113 can also communicate through backhaul. In this case, network device 112 and network device 113 can act as relay nodes in the system.

[0076] For example, terminal devices can also communicate with each other, including but not limited to device-to-device (D2D) transmission. For example, terminal device 122 and terminal device 125 can communicate with each other via D2D transmission as shown in FIG1.

[0077] A network device is a network-side device with wireless transceiver capabilities. A network device can be a device in a radio access network (RAN) that provides wireless communication capabilities to terminal devices. Network devices can be cellular systems related to the 3rd Generation Partnership Project (3GPP), such as 5G mobile communication systems, or future-oriented evolution systems (such as 6G mobile communication systems). Network devices can also be open radio access networks (O-RAN or ORAN), cloud radio access networks (CRAN), or wireless fidelity (WiFi) systems. For example, the network device can be a base station, an evolved NodeB (eNodeB), a next-generation NodeB (gNB) in a 5G mobile communication system, a 3GPP subsequent evolution base station, a transmission reception point (TRP), an access node in a WiFi system, a wireless relay node, a wireless backhaul node, etc. In communication systems employing different radio access technologies (RATs), the names of devices with base station functions may differ. For example, in an LTE system, it may be called an eNB or eNodeB, and in a 5G or NR system, it may be called a gNB. This application does not limit the specific name of the base station. The network equipment may include one or more co-located or non-co-located transmitting and receiving points. Furthermore, the network equipment may include at least one of the following: one or more central units (CUs), one or more distributed units (DUs), and one or more radio units (RUs).

[0078] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an open RAN (ORAN) system, CU can also be called O-CU (open CU), DU can also be called O-DU (open DU), CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. Exemplarily, the function of CU can be implemented by one entity or different entities. For example, the function of CU can be further divided, that is, the control plane and user plane can be separated and implemented through different entities, namely the control plane CU entity (i.e., the CU-CP entity) and the user plane CU entity (i.e., the CU-UP entity). The CU-CP entity and the CU-UP entity can be coupled with the DU to jointly complete the function of the access network device. For example, the CU (Complex Unit) is responsible for handling non-real-time protocols and services, implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU (Digital Unit) is responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers. This allows multiple network function entities to implement some of the functions of a radio access network device. These network function entities can be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). Network devices can also include active antenna units (AAUs). The AAU implements some physical layer processing functions, radio frequency processing, and related functions of the active antenna. Since RRC layer information ultimately becomes PHY layer information, or is derived from PHY layer information, in this architecture, higher-layer signaling, such as RRC layer signaling, can also be considered as being sent by the DU, or by the DU+AAU. It is understood that network devices can be one or more of the following: CU nodes, DU nodes, and AAU nodes. Furthermore, a CU can be classified as a network device in the radio access network (RAN) or as a network device in the core network (CN); this application does not impose any limitations on this.For example, in vehicle-to-everything (V2X) technology, the access network equipment can be a roadside unit (RSU). Multiple access network devices in the communication system can be base stations of the same type or different types. Base stations can communicate with terminal devices, or they can communicate with terminal devices through relay stations. In this embodiment, the device used to implement the network device function can be the network device itself, or a device that supports the network device in implementing that function, such as a chip system or a combination of devices or components that can implement the access network device function. This device can be installed in the network device. In this embodiment, the chip system can be composed of chips, or it can include chips and other discrete devices.

[0079] A terminal device is a user-side device with wireless transceiver capabilities. It can be a fixed device, mobile device, handheld device (e.g., mobile phone), wearable device, in-vehicle device, or a wireless device (e.g., communication module, modem, or chip system) built into the aforementioned devices. Terminal devices are used to connect people, things, and machines, and can be widely used in various scenarios, such as: cellular communication, device-to-device (D2D) communication, V2X communication, machine-to-machine / machine-type communications (M2M / MTC) communication, the Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical care, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, drones, and robots. For example, a terminal device can be a handheld terminal in cellular communication, a communication device in D2D, an IoT device in MTC, a surveillance camera in intelligent transportation and smart cities, or a communication device on a drone, etc. Terminal devices are sometimes referred to as user equipment (UE), user terminal, user device, user unit, user station, terminal, access terminal, access station, UE station, remote station, mobile device, or wireless communication device, etc. A terminal device can also be a terminal device in an IoT system. IoT is an important component of future information technology development. Its main technical characteristic is connecting objects to networks through communication technology, thereby realizing an intelligent network of human-machine interconnection and machine-to-machine interconnection. In the embodiments of this application, IoT technology can achieve massive connectivity, deep coverage, and terminal power saving through, for example, narrowband (NB) technology. In the embodiments of this application, the device used to implement the functions of the terminal device can be the terminal device itself, or a device capable of supporting the terminal device to implement the functions, such as a chip system or a combination of devices or components capable of implementing the functions of the terminal device. This device can be installed in the terminal device. The terminal typically contains a communication module, circuit, or chip that performs the corresponding communication functions. The terminal can also be configured with program instructions for performing corresponding communication functions.

[0080] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0081] For example, the communication system 100 may further include an application function (AF) network element, which is a control plane network function provided by the operator's network for providing application layer information; the communication system 100 may also include a session management function (SMF) network element, which is a control plane network function provided by the operator's network. In this embodiment, when the communication system 100 includes both AF and SMF network elements, the AF can send service-related information to the network device through the SMF.

[0082] To facilitate understanding of the embodiments of this application, the basic concepts involved in this application will be explained first.

[0083] 1. Peak-to-average power ratio (PAPR): Wireless signals, observed in the time domain, are sinusoidal waves with constantly varying amplitudes. The peak amplitude within one cycle differs from that in other cycles; therefore, the average power and peak power differ between cycles. Over a relatively long period, the peak power represents the maximum transient power with a certain probability, typically taken as 0.01% (i.e., 10^-4). The ratio of this peak power to the total average power of the system is the PAPR.

[0084] PAPR is defined as the maximum signal envelope power (P). peak ) and average power (P) avg The ratio of ) is expressed in decibels (dB), that is

[0085] PAPR is a value that measures the degree of envelope undulation of a signal. The larger the PAPR, the greater the degree of envelope undulation.

[0086] 2. Dangers of Excessively High PAPR: Wireless communication systems require power amplification to transmit signals over long distances. Due to technological and equipment cost limitations, a power amplifier typically operates linearly within a certain range. Exceeding this range leads to signal distortion. Signal distortion may prevent the receiving end from correctly interpreting the signal. To ensure the signal peak remains within the linear range of the power amplifier's amplification capability, the average power of the transmitted signal needs to be reduced. This results in lower power amplifier efficiency, or equivalently, a smaller coverage area.

[0087] 3. OFDM: has N d A sequence S of symbols m (equals s) mThe signal is mapped onto the corresponding subcarrier, weighted (i.e., precoding, frequency windowing, power control, etc.), and then subjected to an inverse Fourier transform to obtain the time-domain signal x. m Optional cyclic prefix can be added. Since OFDM signals on a single carrier exhibit a sinc function, they will have trailing patterns on both sides. The trailing patterns from multiple carriers may, with a certain probability, superimpose at a distance to form a point with very high peak power. In other words, using OFDM waveforms can easily cause excessively high PAPR (Power Appearance Ratio).

[0088] Therefore, in order to meet coverage requirements, it is often necessary to choose a signal generation technology with low PAPR.

[0089] 4. Single-carrier: To reduce the PAPR of OFDM waveforms, a single-carrier waveform can be used to transmit data. A single-carrier can be understood as: transmitting data with N... d A sequence S of symbols m Perform N d Point Fourier transform yields the frequency domain signal S m The signal is mapped onto the corresponding subcarrier, weighted (i.e., precoding, frequency windowing, power control, etc.), and then subjected to inverse Fourier transform to obtain the time-domain signal X. m Finally, a cyclic prefix can be optionally added. A single carrier includes, but is not limited to, the following waveforms:

[0090] Single carrier-quadrature amplitude modulation (SC-QAM) waveforms, single carrier-offset quadrature amplitude modulation (SC-OQAM) waveforms, DFT-s-OFDM waveforms, etc. In the embodiments of this application, network devices and terminal devices can communicate using the single carrier described above.

[0091] This application mainly involves DFT-s-OFDM waveforms, and the DFT-s-OFDM technology is introduced below.

[0092] 5. DFT-s-OFDM: A single-carrier technology based on OFDM waveforms. Under the same power amplifier conditions, DFT-s-OFDM waveforms can provide greater output power and higher power amplifier efficiency compared to the aforementioned OFDM waveforms, thereby improving coverage and reducing power consumption. In some embodiments, the DFT-s-OFDM signal is at least one of the following signals: DFT-s-OFDM with FTSS, a DFT-s-OFDM signal carrying real-virtual separation, a DFT-s-OFDM signal carrying a pulse amplitude modulation (PAM) constellation, a DFT-s-OFDM signal carrying real-virtual separation with an additive filter, a DFT-s-OFDM signal carrying a PAM constellation additive filter, and an SC-OQAM signal.

[0093] DFT-s-OFDM waveforms can be used for uplink transmission, but in high-frequency communication, due to device limitations, PAPR (Packet Reduction and Propagation) issues are more severe. Therefore, DFT-s-OFDM waveforms can also be used for downlink transmission. The frequency band for high-frequency communication can be 24250MHz to 52600MHz in NR systems, or higher bands supported by subsequent evolutions of NR systems above 52600MHz, or even higher frequency bands in next-generation communication systems, such as the terahertz (THz) band.

[0094] The DFT-s-OFDM technique involves a Discrete Fourier Transform (DFT) process preceding the OFDM processing; therefore, it can also be called a linear precoding OFDM technique. For ease of understanding, Figure 2 provides a simple introduction to the DFT-s-OFDM technique.

[0095] Figure 2 is a schematic diagram of the processing flow of DFT-s-OFDM technology.

[0096] The transmitting end sequentially performs serial-to-parallel conversion, N-point discrete Fourier transformation (DFT), subcarrier mapping, M-point inverse discrete Fourier transform (IDFT) (or inverse fast Fourier transform (IFFT)), parallel-to-serial conversion, adding cyclic prefix (CP), and digital-to-analog conversion (DAC) to the time-domain discrete sequence, and then transmits the signal through the antenna port and the channel.

[0097] When the receiving end receives the signal through the channel and the antenna terminal, it sequentially performs analog-to-digital conversion (ADC), removing cyclic prefix, serial-to-parallel conversion, M-point DFT, removing subcarrier mapping, N-point IDFT, and parallel-to-serial conversion to obtain the time-domain discrete sequence.

[0098] Through N-point DFT, the transmitting end can obtain the frequency-domain sequence of the time-domain discrete sequence. After subcarrier mapping of this frequency-domain sequence, it is input to the IDFT for M-point IDFT, where N < M. Since the length of the IDFT is greater than that of the DFT, the extra part of the IDFT is padded with zeros when input. After the IDFT, adding a cyclic prefix can avoid symbol interference.

[0099] DFT-s-OFDM has a lower PAPR compared to general OFDM, which can improve the power transmission efficiency of mobile terminals, extend the battery usage time, and reduce terminal costs, etc.

[0100] 5. Frequency-domain grouped DFT-s-OFDM: The data signal is divided into multiple data signal groups. Different data signal groups may be assigned to different UEs. Each data signal group independently performs DFT to obtain the corresponding frequency-domain signal group. Then, the frequency-domain signals in multiple frequency-domain signal groups are mapped to the subcarriers in the frequency domain at equal intervals, or in other words, multiple frequency-domain signal groups are interleaved and placed in the frequency domain. Finally, after multiplexing the signals of all frequency-domain signal groups, they are transmitted through an IFFT. This frequency-domain grouped DFT-s-OFDM method can keep the signal of each group as a single-carrier waveform, so a lower PAPR can be obtained.

[0101] 6. Pilot: Also known as a reference signal, the pilots involved in this application include, but are not limited to, the following reference signals:

[0102] Demodulation reference signals (DMRS), channel state information-reference signals (CSI-RS), tracking reference signals (TRS), sounding reference signals (SRS), phase tracking reference signals (PT-RS), positioning reference signals (PRS), and sensing reference signals (SeRS), etc.

[0103] The pilot signal in this application can also be any reference signal that can be carried in OFDM or a single carrier, other than the reference signals listed above. Examples will not be given here.

[0104] The preceding text, with reference to Figure 1, briefly introduced the application scenarios of the communication method provided in this application embodiment, and introduced the basic concepts that may be involved in this application embodiment. Among these basic concepts, the concept of frequency-domain grouped DFT-s-OFDM was introduced. Figure 3 shows one method of frequency-domain grouped DFT-s-OFDM. As can be seen from Figure 3, the data signal is divided into n data signal groups (e.g., data signal group #1, data signal group #2, and data signal group #n shown in Figure 3). These n data signal groups undergo DFT independently to obtain n frequency-domain signal groups (e.g., frequency-domain signal group #1, frequency-domain signal group #2, and frequency-domain signal group #n shown in Figure 3). The frequency-domain signals in these n frequency-domain signal groups are mapped to frequency-domain subcarriers at equal intervals, as shown in Figure 3, where the frequency-domain signals in different frequency-domain signal groups are interleaved in the frequency domain. Finally, the signal is IFFTed and transmitted. The multiple subcarriers mapping multiple frequency-domain signals in a certain frequency-domain signal group can be considered as a group of subcarriers. For example, frequency domain signal group #1 is mapped at equal intervals onto multiple subcarriers #1 in the frequency domain, and these multiple subcarriers #1 can be called subcarrier group #1; frequency domain signal group #2 is mapped at equal intervals onto multiple subcarriers #2 in the frequency domain, and these multiple subcarriers #2 can be called subcarrier group #2; frequency domain signal group #n is mapped at equal intervals onto multiple subcarriers #n in the frequency domain, and these multiple subcarriers #n can be called subcarrier group #n.

[0105] In the frequency-domain grouped DFT-s-OFDM scheme shown in Figure 3 above, the different subcarrier groups considered are frequency-domain signals obtained by DFT for transmitting data signals from different UEs. Other functions of the subcarrier groups are not considered, such as considering some subcarrier groups as mapped pilot signals for single-symbol physical downlink control channel (PDCCH) and / or physical uplink control channel (PUCCH) transmission.

[0106] Another frequency-domain grouping DFT-s-OFDM scheme is shown in Figure 4. Different subcarrier groups are used to transmit data signals for different UEs. Some subcarrier groups can be mapped to pilot signals.

[0107] The frequency-domain grouping DFT-s-OFDM scheme described in Figures 3 and 4 above can maintain each signal group (e.g., data signal and / or pilot signal) as a single-carrier waveform, thus maintaining the characteristic of a low PAPR for single-carrier waveforms. However, in some scenarios, it is necessary to further reduce the PAPR to meet the coverage requirements of that scenario. For example, in short packet transmission scenarios, the coverage requirements can be met by reducing the PAPR. Here, short packet transmission can be understood as having short DFT-s-OFDM symbols (e.g., scenarios where the number of DFT-s-OFDM symbols is less than or equal to 10).

[0108] This application provides a communication method aimed at reducing PAPR.

[0109] The communication method provided in this application can be applied to systems that communicate using multi-antenna technology, such as the communication system 100 shown in FIG1. ​​This communication system may include at least one network device and at least one terminal device.

[0110] The embodiments shown below do not specifically limit the structure of the execution entity of the method provided in the embodiments of this application. As long as communication can be performed according to the method provided in the embodiments of this application by running a program that records the code of the method provided in the embodiments of this application. For example, the method provided in the embodiments of this application can be executed by a first communication device. Unless otherwise specified, "first communication device" in this application can refer to the first communication device itself (e.g., a network device, a terminal device), a component in the first communication device (e.g., a processor, a chip, or a chip system), or a logic module or software that can implement all or part of the functions of the first communication device. As another example, the method provided in the embodiments of this application can be executed by a second communication device. Unless otherwise specified, "second communication device" in this application can refer to the second communication device itself (e.g., a network device, a terminal device), a component in the second communication device (e.g., a processor, a chip, or a chip system), or a logic module or software that can implement all or part of the functions of the second communication device.

[0111] Figure 5 is a schematic flowchart of a communication method provided in an embodiment of this application, including the following steps:

[0112] S510, the first communication device determines the first instruction information.

[0113] For example, unless otherwise specified, the first communication device in this application is a device that generates and transmits the first symbol, which can be a terminal device or a network device. For example, the first communication device is a network device and the second communication device is a terminal device; or, the first communication device and the second communication device can be other functional entities that can perform the corresponding functions, and this application does not impose any limitations on them.

[0114] Optionally, the first symbol mentioned above can be a DFT-s-OFDM symbol. Alternatively, the first symbol can be any other symbol with low single-carrier PAPR characteristics, and this application does not limit this.

[0115] In this application, the first symbol can be understood as a time-domain resource. The first symbol is a time-domain unit in the time domain, and can also be called a time-domain unit or other names. In this application, there is no limitation on the name of the time-domain unit, as long as it meets the provisions of this embodiment. For ease of description, the first symbol is used as an example for explanation.

[0116] Specifically, the first indication information is used to indicate the Q1 activated subcarrier groups among the Q subcarrier groups corresponding to the first symbol, and each subcarrier group includes multiple second subcarriers. Unless otherwise specified, in this application, the activated subcarrier groups carry non-zero frequency domain signals, while the inactive subcarrier groups do not carry frequency domain signals or carry zero frequency domain signals. The frequency domain signals are obtained from the data signals through DFT transformation.

[0117] For example, unless otherwise specified, the first subcarrier in this application may also be referred to as a pilot subcarrier, that is, a subcarrier used to carry pilot signals. The first communication device can transmit the pilot signal by mapping it onto the first subcarrier. The second subcarrier may also be referred to as a data subcarrier, that is, a frequency domain signal obtained by DFT transformation of the data signal. The first communication device can transmit the frequency domain signal by mapping it onto the second subcarrier in the Q1 subcarrier group.

[0118] Optionally, unless otherwise specified, in this application, the Q subcarrier groups are the number of groups indicated by the first communication device, or the Q subcarrier groups are a predefined number of groups, or the Q subcarrier groups are the number of groups associated with the frequency domain spacing of the pilots. For example, the first communication device indicates the pattern of the Q subcarrier groups corresponding to the first symbol through information #1; or, for example, the pattern of the Q subcarrier groups corresponding to the first symbol is predefined or preconfigured; or, for example, if the frequency domain spacing of the pilots in the first symbol is Q, then the data subcarriers corresponding to the first symbol can be divided into Q groups.

[0119] The multiple first subcarriers corresponding to the first symbol carry multiple first pilot signals. The subcarriers other than these first subcarriers are divided into Q subcarrier groups, each containing multiple second subcarriers. Q1 subcarrier groups within these Q subcarrier groups are activated. The interval between the P-th and P+1-th first subcarriers is X second subcarriers, where P, Q1, and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q. The subcarriers corresponding to the first symbol can be understood as subcarriers within the first symbol, i.e., subcarriers included within the time domain of the first symbol.

[0120] For example, the Pth first subcarrier and the (P+1)th first subcarrier can be understood as two consecutive first subcarriers in the frequency domain. The interval of X second subcarriers between the Pth first subcarrier and the (P+1)th first subcarrier can be understood as the interval of X second subcarriers between a certain first subcarrier #1 and the next first subcarrier of that first subcarrier #1, that is, multiple first subcarriers are uniformly and discretely distributed in the frequency domain.

[0121] As an example and not a limitation, the multiple second subcarriers included in each of the Q subcarrier groups mentioned above are uniformly and discretely distributed in the frequency domain.

[0122] For example, the second subcarrier P and the second subcarrier P+1 in the first subcarrier group are spaced by X1 subcarriers. The first subcarrier group is one of Q subcarrier groups, where X1 is a positive integer and the X1 subcarriers include the first subcarrier and / or the second subcarrier.

[0123] Optionally, the first subcarrier group mentioned above is one of the Q subcarrier groups. The multiple second subcarriers in the other subcarrier groups of the Q subcarrier groups can also be uniformly and discretely distributed in the frequency domain. For example, the P second subcarriers and the P+1th second subcarrier in the second subcarrier group are spaced apart by X2 subcarriers. The second subcarrier group is one of the Q subcarrier groups other than the first subcarrier group. X2 and X1 can be the same or different, and X1 subcarriers include the first subcarrier and / or the second subcarrier, and X2 subcarriers include the first subcarrier and / or the second subcarrier.

[0124] For ease of understanding, the patterns of the first and second subcarriers in the first symbol of this embodiment are described with reference to Figures 6(a) and (b).

[0125] As can be seen from Figure 6(a), the multiple second subcarriers included in each of the Q subcarrier groups corresponding to the first symbol are uniformly and discretely distributed in the frequency domain, and the interval between any two consecutive second subcarriers in each of the Q subcarrier groups is the same. As shown in Figure 6(a), the interval between any two consecutive second subcarriers in the first subcarrier group is 3 subcarriers, the interval between any two consecutive second subcarriers in the second subcarrier group is 3 subcarriers, and the interval between any two consecutive second subcarriers in the third subcarrier group is 3 subcarriers.

[0126] As can be seen from Figure 6(b), the multiple second subcarriers included in each of the Q subcarrier groups corresponding to the first symbol are uniformly and discretely distributed in the frequency domain, and the interval between two consecutive second subcarriers in different subcarrier groups can be different. As shown in Figure 6(b), in the multiple second subcarriers included in the first subcarrier group, there is a 1-subcarrier interval between two consecutive second subcarriers, and in the multiple second subcarriers included in the second subcarrier group, there is a 3-subcarrier interval between two consecutive second subcarriers.

[0127] By way of example and not limitation, unless otherwise specified, the first indication information in this application indicating the Q1 subcarrier groups that are activated in the Q subcarrier groups can be: the first indication information is used to indicate the pattern of the Q1 subcarrier groups in the Q subcarrier groups.

[0128] As one possible implementation, the first indication information indicates the pattern of the Q1 subcarrier groups by indicating the positions of the Q1 subcarrier groups within the Q subcarrier groups.

[0129] For example, in this implementation, the first indication information can directly indicate the position of the Q1 subcarrier groups within the Q subcarrier groups. For instance, the first indication information indicates that the Q1 subcarrier groups are the first and second subcarrier groups within the Q subcarrier groups.

[0130] For example, in this implementation, the first indication information can indirectly indicate the pattern of the Q1 subcarrier groups by relating the position of the Q1 subcarrier groups within the Q subcarrier groups to at least one of the following information:

[0131] The identifiers include the UE ID, cell ID, first symbol index, time slot index, subframe index, frame index, or bandwidth part (BWP) identifier.

[0132] In this implementation, different subcarrier groups can be configured for different multi-user transmissions through this design.

[0133] For example, when UE ID is 1, Q1 subcarrier groups are the first subcarrier group out of Q subcarrier groups. When UE ID is 2, Q1 subcarrier groups are the second subcarrier group out of Q subcarrier groups.

[0134] For example, when Cell ID = 1, the Q1 subcarrier group is the first subcarrier group out of the Q subcarrier groups. When Cell ID = 2, the Q1 subcarrier group is the second subcarrier group out of the Q subcarrier groups.

[0135] For example, when the index of the first symbol is 1, the Q1 subcarrier group is the first subcarrier group among the Q subcarrier groups. When the index of the first symbol is 2, the Q1 subcarrier group is the second subcarrier group among the Q subcarrier groups.

[0136] For example, in this implementation, the first indication information can indirectly indicate the pattern of the Q1 subcarrier groups by indicating the position of the Q1 subcarrier groups within the Q subcarrier groups through an indication index and being related to at least one of the following information. For example, the Q1 subcarrier groups may be a mapping function between an index and a subcarrier group number, where different subcarrier groups at different positions are activated for different indices.

[0137] Optionally, the magnitude of Q1 is related to at least one of the following parameters: the magnitude of N, the magnitude of Q, the modulation order, or the PAPR value of the first pilot sequence, where N is the number of symbols carrying the pilot. The relationship between the magnitude of Q1 and the above parameters can be expressed through tables, conditions, or formulas.

[0138] For example, the more symbols carrying the pilot signal in a single transmission, the fewer the values ​​of Q1, resulting in a better PAPR. Conversely, the fewer the symbols carrying the pilot signal in a single transmission, the larger the value of Q1 can be.

[0139] For example, if the number of symbols carrying the pilot signal is 1, all or most of the Q subcarrier groups corresponding to that symbol can be activated. For instance, if the symbols carrying the pilot signal include symbol #1, which corresponds to 3 subcarrier groups, 3 or 2 of these 3 subcarrier groups can be activated.

[0140] For example, if the number of symbols carrying the pilot signal is greater than 1, some or all of the subcarrier groups corresponding to each symbol are activated to ensure a low PAPR. The number of subcarrier groups corresponding to different symbols can be the same or different, and the number of activated groups can also be the same or different. For instance, the symbols carrying the pilot signal include symbol #1 and symbol #2. Symbol #1 corresponds to 3 subcarrier groups #1, and symbol #2 corresponds to 3 subcarrier groups #2. Two subcarrier groups #1 out of the three subcarrier groups #1 can be activated, and two subcarrier groups #2 out of the three subcarrier groups #2 can be activated, or three subcarrier groups #3 out of the three subcarrier groups #2 can be activated.

[0141] For example, when the total number of subcarrier groups is small, all subcarrier groups corresponding to a symbol can be activated; when the total number of subcarrier groups is large, some or all of the subcarrier groups corresponding to a symbol can be activated, thus achieving a better PAPR. For instance, when the total number of subcarrier groups corresponding to symbol #1 is 2, all of the subcarrier groups corresponding to symbol #1 can be activated; or, when the total number of subcarrier groups corresponding to symbol #1 is 4, 2 or more of the 4 subcarrier groups corresponding to symbol #1 can be activated.

[0142] For example, when the modulation order is low, fewer subcarrier groups corresponding to a symbol are activated, ensuring a smaller PAPR increase. For instance, when the modulation order corresponding to symbol #1 is 3, two of the four subcarrier groups corresponding to symbol #1 can be activated; or, when the modulation order corresponding to symbol #1 is 5, three or four subcarrier groups corresponding to symbol #1 can be activated.

[0143] For example, a lower PAPR of the first pilot sequence allows for the activation of more subcarrier groups, i.e., a larger Q1 value. This is because a low PAPR pilot sequence is used, and a lower PAPR supports the activation of more subcarrier groups. For instance, if the first pilot is a Pi / 2BPSK modulated m-sequence, the four subcarrier groups corresponding to symbol #1 can activate three or four subcarrier groups. As another example, if the first pilot is a ZC sequence, the four subcarrier groups corresponding to symbol #1 can activate two subcarrier groups. In this case, the PAPR of the Pi / 2BPSK modulated m-sequence is lower than that of the ZC sequence.

[0144] Optionally, unless otherwise specified, this application can also improve PAPR and enhance the trade-off between channel estimation performance and detection performance by setting the energy ratio of the frequency domain signal to the pilot signal. For example, a first energy is configured for multiple first subcarriers, and a second energy is configured for Q1 subcarrier groups, wherein the ratio between the first energy and the second energy is a preset value or a value related to Q1. The first energy configured for multiple first subcarriers can be understood as the pre-configured signal power for the pilot signal; the second energy configured for Q1 subcarrier groups can be understood as the pre-configured signal power for the data signal.

[0145] As an example and not a limitation, the pre-configured signal power of the pilot signal, Q1, and the pre-configured signal power of the data signal satisfy the following relationship:

[0146] 10log10(A / (Q1-1)B)dB, where A represents the pre-configured signal power of the pilot signal, Q1 is the number of active subcarrier groups, and B represents the pre-configured signal power of the data signal.

[0147] Furthermore, in this embodiment, after the first communication device determines the first indication information, it can send the first indication information to the second communication device. Therefore, the method flow shown in Figure 5 further includes:

[0148] S520, the first communication device sends a first instruction message to the second communication device, and correspondingly, the second communication device receives the first instruction message from the first communication device.

[0149] In this embodiment, no limitation is made on the method by which the first communication device sends the first instruction information to the second communication device. Reference can be made to the description of information transmission between existing or future communication devices.

[0150] As one possible implementation, the first communication device may send the first instruction information to the second communication device at the same time as sending the first symbol to the second communication device; or, the first communication device may send the first instruction information to the second communication device after sending the first symbol to the second communication device; or, the first communication device may send the first instruction information to the second communication device before sending the first symbol to the second communication device.

[0151] As another possible implementation, the first indication information can be predefined, such as a protocol predefined indication of the Q1 active subcarrier groups out of the Q subcarrier groups. The first and second communication devices can then determine the Q1 active subcarrier groups based on the predefined or pre-configured first indication information. In this implementation, the second communication device can determine the subcarrier groups carrying frequency domain signals in the received first symbol based on the predefined first indication information.

[0152] S530, the second communication device demodulates the first symbol according to the first instruction information.

[0153] Corresponding to the first symbol format described above (e.g., the Q1 subcarrier groups activated in the Q subcarrier groups shown above), in this embodiment, after the second communication device receives the first symbol, it can parse the first symbol based on the first indication information to know the position of the pilot subcarriers in the frequency domain and the position of the data subcarriers in the frequency domain.

[0154] Specifically, the receiving device can perform channel estimation based on multiple first pilots carried on the pilot subcarriers.

[0155] For example, in order for the second communication device to correctly parse the first symbol after receiving it, the first and second communication devices can reach a consensus on the position of the pilot subcarrier in the first symbol. Therefore, the method flow shown in Figure 5 may further include:

[0156] S511, the first communication device sends a second instruction message to the second communication device, and correspondingly, the second communication device receives the second instruction message from the first communication device.

[0157] Specifically, the second indication information is used to indicate the pattern of multiple first subcarriers, that is, the second indication information indicates the position of the pilot subcarrier in the first symbol.

[0158] Optionally, the second indication information may indicate the density of pilot subcarriers in the first symbol, and / or indicate the starting position of the pilot subcarriers in the first symbol in the frequency domain resource. For example, the second indication information is used to indicate the density of a plurality of first subcarriers and the position of the first first subcarrier among the plurality of first subcarriers in the frequency domain resource.

[0159] In addition, the density of pilot subcarriers in the first symbol, and / or the starting position of the pilot subcarriers in the first symbol in the frequency domain resources can be predefined by the protocol.

[0160] For example, the density of pilot subcarriers within the first symbol can be configured by network devices or pre-configured in the protocol. For example, the density of pilot subcarriers within the first symbol can be configured as 1 / 2, 1 / 3, 1 / 4, 1 / 6, or 1 / 12, which means it can be an integer multiple of 1 / 12, so that there is at least one pilot subcarrier in a resource block (RB) and it is evenly distributed within the RB.

[0161] If the density of the pilot subcarriers in the first symbol is predefined by the protocol, then the second indication information can indicate the starting position of the pilot subcarriers in the first symbol in the frequency domain resources; or, if the starting position of the pilot subcarriers in the first symbol in the frequency domain resources is predefined by the protocol, then the second indication information can indicate the density of the pilot subcarriers in the first symbol; or, if both the density of the pilot subcarriers in the first symbol and the starting position of the pilot subcarriers in the first symbol in the frequency domain resources are predefined, then the aforementioned second indication information need not be sent.

[0162] For example, the second indication information indicates the density of pilot subcarriers in the first symbol by indicating at least one of the following:

[0163] 1 / X-1, X+1, or X.

[0164] For example, if the second indication information indicates 1 / X-1, the density of the first subcarrier can be determined based on the second indication information.

[0165] For example, if the first indication information indicates X+1, it can be known from the second indication information that there is a first subcarrier in every X+1 subcarriers, and the density of the first subcarrier can be indirectly determined to be 1 / m based on X+1.

[0166] For example, if the first indication information indicates X, it can be known from the second indication information that there is an interval of X second subcarriers between the Pth first subcarrier and the P+1th first subcarrier, and the density of the first subcarrier can be indirectly determined to be 1 / X-1 based on X.

[0167] For example, the second indication information achieves the purpose of indicating the position of the pilot subcarrier in the first symbol by indicating the position of the first first subcarrier among a plurality of first subcarriers on a frequency domain resource (e.g., RB).

[0168] For example, the starting position of the pilot subcarrier in the frequency domain resources can be associated with at least one of the following parameters:

[0169] The identifiers include the UE ID, cell ID, index of the first OFDM symbol, time slot index, subframe index, frame index, or bandwidth part (BWP) identifier. For example, the starting position of the pilot subcarrier on the RB is related to mod(X,m), where m represents the pilot subcarrier density 1 / m. X is a combination of one or more of the above parameters, such as X being the sum of multiple parameters. This helps to minimize interference between users and between cells and avoids allocating pilots to the same subcarrier.

[0170] In the communication method shown in Figure 5, the first communication device can indicate the activation of Q1 subcarrier groups in the first symbol through first indication information. These Q1 activated subcarrier groups carry frequency domain signals, and are a portion of the Q subcarrier groups corresponding to the first symbol. The subcarriers corresponding to the first symbol, excluding the multiple first subcarriers used to carry pilot signals, are divided into Q subcarrier groups. Each of these Q subcarrier groups includes multiple second subcarriers. These second subcarriers can carry frequency domain signals, but the first communication device, through the first indication information, indicates the activation of the Q1 subcarrier groups. In these Q1 subcarrier groups, radio frequency domain signals are mapped, while the frequency domain signals mapped in the Q subcarrier groups, excluding the activated Q1 subcarrier groups, are 0. This improves the PAPR of the first symbol and enhances channel estimation performance.

[0171] The sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0172] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0173] In the above embodiments, examples of devices in existing network architectures (such as a first communication device, a second communication device, etc.) are used for illustrative purposes. The specific form of the devices is not limited in the embodiments of this application. For example, any device that can achieve the same function in the future is applicable to the embodiments of this application.

[0174] It is understood that, in the above-described method embodiments, the methods and operations implemented by the device (such as the first communication device or the second communication device) can also be implemented by components of the device (such as chips or circuits).

[0175] The communication method provided by the embodiments of this application has been described in detail above with reference to Figures 5 and 6. The above communication method is mainly described from the perspective of the interaction between the first communication device and the second communication device. It can be understood that, in order to realize the above functions, the first communication device and the second communication device include hardware structures and / or software modules corresponding to the execution of each function.

[0176] Those skilled in the art will recognize that, based on the units and algorithm steps described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0177] The communication device provided in the embodiments of this application will be described in detail below with reference to Figures 7 to 10. The description of the device embodiments corresponds to the description of the method embodiments. Therefore, for content not described in detail, please refer to the method embodiments above. For the sake of brevity, some content will not be repeated.

[0178] This application embodiment can divide the communication device into functional modules according to the above method example. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated modules can be implemented in hardware, software, or a combination of both. The module division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation. The following description uses the division of functional modules according to each function as an example.

[0179] Figure 7 is an exemplary block diagram of the communication device 10 provided in an embodiment of this application.

[0180] As shown in Figure 7, for example, the communication device 10 may include a chip system 110, a memory 120, a bus 130, a power management module 140, or a transceiver 150, etc.

[0181] The chip system 110 can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method (e.g., steps S510 and S530 in Figure 5) can be completed by the integrated logic circuit in the hardware of the chip system 110 or by instructions in the form of software.

[0182] As an example and not a limitation, chip system 110 may include circuitry or chips responsible for signal processing (such as a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip or system-in-package (SIP) chip containing a modem core).

[0183] Optionally, the chip system 110 may also include a memory (such as a cache) for storing instructions and data. In some embodiments, the memory in the chip system 110 is a cache memory. This memory can store instructions or data that the chip system 110 has just used or that are used repeatedly. If the chip system 110 needs to use the instruction or data again, it can directly retrieve it from the memory. This avoids repeated accesses, reduces the waiting time of the chip system 110, and thus improves the efficiency of the system.

[0184] In some embodiments, the chip system 110 may include one or more interfaces. Interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a SIM interface, and / or a USB interface, etc.

[0185] Memory 120 may include random access memory (RAM) and read-only memory (ROM). Memory 120 may store computer-readable, computer-executable code, including instructions that, when executed, cause the processor to perform the various functions described in this application.

[0186] Optionally, the code may include instructions for implementing various aspects of the embodiments of this application, including instructions for supporting the generation or parsing of the first symbol. The code may be stored in a non-transitory computer-readable medium such as system memory or other types of memory. In some cases, the code may not be directly executable by the chip system 110, but may instead enable a computer (e.g., at compile and execution time) to perform the functions described in this application. In some cases, memory 120 may in particular contain a basic I / O system that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0187] For example, the chip system 110 executes various functional applications and data processing of the communication device 10 by running instructions stored in the memory 120. For instance, when the communication device 10 transfers files with other devices (which may also be terminals or access network devices), the chip system 110 of the communication device 10 can call the computer-executable program code stored in the memory 120 to implement the data and / or signaling transmission methods provided in the embodiments of this application.

[0188] In addition, the memory 120 can be integrated into the chip system 110 or independent of the chip system 110.

[0189] Bus 130 may be a universal serial bus (USB) used to support communication between the various parts of the communication device 10.

[0190] The power management module 140 is used to receive charging input from the charger. Optionally, the power management module 140 can also supply power to the communication device 10 while charging it (e.g., the battery module of the communication device 10). By way of example and not limitation, the power management module 140 can also supply power to other devices besides the communication device 10.

[0191] Transceiver 150 can communicate bidirectionally via one or more antennas, wired links, or wireless links. For example, transceiver 150 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 150 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and for demodulating packets received from the antenna. Transceiver 150 may include a receiver and a transmitter, the receiver performing the function of receiving information and the transmitter performing the function of transmitting information.

[0192] In some cases, a wireless device may include a single antenna. However, in other cases, the device may have more than one antenna, such as antenna 1 and antenna 2 shown in FIG. 7, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions. Exemplarily, antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in communication device 10 can be used to cover one or more communication frequency bands. Different antennas can also be multiplexed to improve antenna utilization. For example, antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. In other embodiments, the antennas can be used in conjunction with a tuning switch. Communication device 10 can transfer files to other devices via wireless communication functions.

[0193] In one design, the communication device 20 may correspond to the first communication device in the above method embodiment.

[0194] The device 10 can implement the steps or processes corresponding to those performed by the first communication device in the above method embodiments. The transceiver 150 can be used to perform operations related to the transmission and reception of the first communication device in the above method embodiments, such as performing steps S511 and S520 in the above method embodiments. The chip system 110 can be used to perform operations related to the processing of the first communication device in the above method embodiments, such as performing step S510 in the above method embodiments.

[0195] In another design, the communication device 10 may correspond to the second communication device in the above method embodiment.

[0196] The device 10 can implement the steps or processes corresponding to those performed by the second communication device in the above method embodiments. The transceiver 150 can be used to perform operations related to the transmission and reception of the second communication device in the above method embodiments, such as performing steps S511 and S520 in the above method embodiments. The chip system 110 can be used to perform operations related to the processing of the second communication device in the above method embodiments, such as performing step S530 in the above method embodiments.

[0197] Under this design, the communication device 10 may include modules such as a short-range communication module 164, a sensor 161, a display 162, or a camera 163 as shown in FIG7.

[0198] The short-range communication module 164 may include modules that support short-range communication, such as Wi-Fi and Bluetooth.

[0199] Sensor 161 may include pressure sensors, gyroscope sensors, barometric pressure sensors, magnetic sensors, accelerometers, distance sensors, proximity sensors, fingerprint sensors, temperature sensors, touch sensors, ambient light sensors, bone conduction sensors, etc.

[0200] Display 162 is used to display images, videos, etc. The display includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a Miniled LED, a MicroLED, a Micro-OLED, a quantum dot light-emitting diode (QLED), etc. For example, in this embodiment, the display can be used to display the interface required by the communication device 10. Exemplarily, the communication device 10 implements display functions through a GPU, a display, and an application processor. The GPU is a microprocessor for image processing, connected to the display and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The chip system 110 may include one or more GPUs that execute program instructions to generate or modify display information.

[0201] Camera 163 is used to acquire images, videos, etc.

[0202] It is understood that the structure shown in Figure 7 does not constitute a specific limitation on the communication device 10, and the specific structure of the terminal device and / or network device can be referred to Figure 7. In some embodiments, the communication device 10 may also include more or fewer components than shown in Figure 7, or combine some components, or split some components, or have different component arrangements, etc. Alternatively, some components shown in Figure 7 may be implemented in hardware, software, or a combination of software and hardware, and the terminal device and / or network device may add or reduce components based on the structure given in Figure 7.

[0203] Figure 8 is a schematic block diagram of the communication device 20 provided in an embodiment of this application.

[0204] As shown in Figure 8, the communication device 20 may include a baseband unit 210, which can communicate with external devices through a cellular RF transceiver 220 (e.g., if the communication device 20 is a terminal device, the baseband unit 210 can communicate with access network devices through the cellular RF transceiver 220; or, if the communication device 20 is an access network device, the baseband unit 210 can communicate with terminal devices and / or core network devices through the cellular RF transceiver 220).

[0205] Baseband unit 210 may include computer-readable medium / memory. Baseband unit 210 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. When executed by baseband unit 304, the software causes baseband unit 210 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by baseband unit 210 during software execution.

[0206] The baseband unit 210 further includes a receiving unit 201, a management unit 202, and a transmitting unit 203. The management unit 202 includes one or more sub-units shown in FIG. 8 (e.g., a symbol generation sub-unit and a symbol resolution sub-unit, wherein the symbol generation sub-unit can be used for generating the first symbol in the above method embodiments, and the symbol resolution sub-unit can be used for resolving the first symbol in the above method embodiments). The units within the management unit 201 can be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 210. The receiving unit 201 and the transmitting unit 203 can be referred to as transceiver units.

[0207] When the communication device 20 is used to implement the function of the first communication device in the above method embodiments, the receiving unit 201 is used to execute the receiving step of the first communication device, the sending unit 203 is used to execute the sending step of the first communication device, and the management unit 202 is used to execute the processing step of the first communication device.

[0208] For example, when the communication device 20 is used to implement the functions of the first communication device in the above-described method embodiments, the management unit 202 is used to determine first indication information, which is used to indicate the Q1 subcarrier groups activated in the Q subcarrier groups corresponding to the first symbol. The transmission unit 203 is used to transmit the first indication information, wherein the Q subcarrier groups are subcarrier groups divided from the subcarriers in the first symbol excluding the plurality of first subcarriers, each subcarrier group includes a plurality of second subcarriers, the plurality of first subcarriers respectively carry a plurality of first pilots, the Q1 subcarrier groups carry frequency domain signals, the frequency domain signals are obtained by DFT transformation of data signals, and there is an interval of X second subcarriers between the Pth first subcarrier and the P+1th first subcarrier, where P, Q1, and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q.

[0209] For example, when the device 20 is used to perform the method in FIG5, the receiving unit 201 can be used to perform the step of receiving information in the method; the management unit 202 can be used to perform the processing step in the method, such as step S510; and the sending unit 203 can be used to perform the step of sending information in the method, such as steps S511 and S520.

[0210] When the communication device 20 is used to implement the function of the second communication device in the above method embodiments, the receiving unit 201 is used to execute the receiving step of the first communication device, the sending unit 203 is used to execute the sending step of the second communication device, and the management unit 202 is used to execute the processing step of the second communication device.

[0211] For example, when the communication device 20 is used to implement the function of the second communication device in the above method embodiments, the receiving unit 201 is used to receive first indication information, which indicates the Q1 subcarrier groups activated in the Q subcarrier groups corresponding to the first symbol; the management unit 202 is used to demodulate the first symbol according to the first indication information, wherein the Q subcarrier groups are subcarrier groups divided from the subcarriers of the first symbol excluding the plurality of first subcarriers, each subcarrier group includes a plurality of second subcarriers, the plurality of first subcarriers respectively carry a plurality of first pilots, the Q1 subcarrier groups carry frequency domain signals, the frequency domain signals are obtained by DFT transformation of data signals, and there is an interval of X second subcarriers between the Pth first subcarrier and the P+1th first subcarrier, where P, Q1, and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q.

[0212] For example, when the device 20 is used to execute the method in FIG5, the receiving unit 201 can be used to execute the step of receiving information in the method, such as steps S511 and S520; the management unit 202 can be used to execute the processing step in the method, such as step S530; and the sending unit 203 can be used to execute the step of sending information in the method.

[0213] For a more detailed description of the receiving unit 201, management unit 202 and sending unit 203, please refer to the relevant descriptions in the above method embodiments, which will not be repeated here.

[0214] As can be seen from the foregoing description of the communication device shown in Figure 7, the communication device may include a chip system. Unless otherwise specified, the term "second communication device" may refer to the second communication device itself, or it may refer to a device that enables the first communication device to perform its functions. Optionally, the second communication device may be an access network device; or, the second communication device may be a chip system within an access network device.

[0215] Furthermore, unless otherwise specified, the term "first communication device" may refer to the first communication device itself or to a device that enables the first communication device to perform its functions. Optionally, the first communication device may be a terminal device; or, the first communication device may be a chip system within a terminal device.

[0216] By way of example and not limitation, the chip system in this application is shown in FIG9, which is a schematic block diagram of the chip system 30 provided in an embodiment of this application. The chip system includes, but is not limited to, a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip or a system-in-package (SIP) chip containing a modem core.

[0217] As can be seen from Figure 9, the chip system (or processing system) includes a processor 310, a memory 320, and an input / output interface 330.

[0218] The processor 310 can be a processing circuit in the chip system (including at least one processor, such as processor 1 and processor 2 as shown in FIG. 9). The processor 310 can be coupled to the memory 320 to call the instructions in the memory 320, so that the chip system can implement the methods and functions of the various embodiments of this application. The input / output interface 330 can be an input / output circuit in the chip system, which outputs the information processed by the chip system, or inputs the data or signaling information to be processed into the chip system for processing.

[0219] As one approach, the chip system is used to implement the operations performed by the first or second communication device in the various method embodiments described above.

[0220] For example, the processor 310 is used to implement the processing-related operations performed by the first communication device or the second communication device in the above method embodiments. Specifically, refer to the description in the foregoing embodiments and execute steps S510 or S530 as shown in FIG5. The input / output interface 330 is used to implement the sending and / or receiving-related operations performed by the first communication device or the second communication device in the above method embodiments. Specifically, refer to the description in the foregoing embodiments and execute steps S511 or S520 as shown in FIG5.

[0221] As an example and not a limitation, the chip system in this application is shown in FIG10, which is a schematic block diagram of the chip system 40 provided in an embodiment of this application.

[0222] As shown in Figure 10, the chip system (or processing system) includes an input / output interface 410 and logic circuitry 420. The input / output interface 410 can be an input / output circuit within the chip system, outputting processed information or inputting data or signaling information to be processed. Specifically, it can be referred to the description in the preceding embodiments, executing steps S511 or S520 as shown in Figure 5. The logic circuitry 420 is used to execute the aforementioned communication method, specifically referring to the description in the preceding embodiments, executing steps S510 or S530 as shown in Figure 5.

[0223] As one approach, the chip system is used to implement the operations performed by the first or second communication device in the various method embodiments described above.

[0224] For example, logic circuit 420 is used to implement processing-related operations performed by the first communication device or the second communication device in the above method embodiments; input / output interface 410 is used to implement sending and / or receiving-related operations performed by the first communication device or the second communication device in the above method embodiments.

[0225] This application also provides a computer-readable storage medium storing computer instructions for implementing the methods executed by the device in the above-described method embodiments.

[0226] For example, when the computer program is executed by a computer, it enables the computer to implement the methods executed by the terminal device or network device in the various embodiments of the above methods.

[0227] This application also provides a computer program product comprising instructions that, when executed by a computer, implement the methods performed by a terminal device or network device in the above-described method embodiments.

[0228] This application also provides a communication system, including the aforementioned terminal device and network device.

[0229] The explanations and beneficial effects of the relevant contents in any of the devices provided above can be found in the corresponding method embodiments provided above, and will not be repeated here.

[0230] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0231] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0232] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0233] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0234] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0235] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A communication method, characterized in that, include: Determine first indication information, which is used to indicate the Q1 subcarrier groups that are activated in the Q subcarrier groups corresponding to the first symbol; Send the first instruction information, Wherein, the Q subcarrier groups are subcarrier groups formed by dividing the subcarriers in the first symbol into multiple first subcarriers, each subcarrier group including multiple second subcarriers, the multiple first subcarriers respectively carrying multiple first pilots, the Q1 subcarrier groups carrying frequency domain signals, the frequency domain signals being obtained from the data signals through Discrete Fourier Transform (DFT), the interval between the Pth first subcarrier and the (P+1)th first subcarrier being X second subcarriers, where P, Q1, and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q.

2. The method according to claim 1, characterized in that, The second subcarrier P and the second subcarrier P+1 in the first subcarrier group are spaced apart by X1 subcarriers. The first subcarrier group is one of the Q subcarrier groups, and X1 is a positive integer.

3. The method according to claim 2, characterized in that, The second subcarrier group consists of P second subcarriers and the (P+1)th second subcarrier, with a spacing of X2 subcarriers between them. The second subcarrier group is one of the Q subcarrier groups other than the first subcarrier group. Where X2 is a positive integer, and X2 and X1 may be equal or not equal.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: Send a second indication message, which is used to indicate the pattern of the plurality of first subcarriers.

5. The method according to claim 4, characterized in that, The second indication information is used to indicate the density of the plurality of first subcarriers and the position of the first first subcarrier among the plurality of first subcarriers in the frequency domain resources.

6. The method according to claim 5, characterized in that, The second indication information indicates the density of the plurality of first subcarriers, including: the second indication information indicates 1 / X-1 and / or X.

7. The method according to any one of claims 1 to 6, characterized in that, The first indication information indicates the position of the Q1 subcarrier groups in the Q subcarrier groups.

8. The method according to claim 7, characterized in that, The position of the Q1 subcarrier groups within the Q subcarrier groups is related to at least one of the following: The identifier of the terminal device, the identifier of the cell, the index of the first symbol, the index of the time slot, the index of the subframe, the index of the frame, or the identifier of the partial bandwidth BWP.

9. The method according to any one of claims 1 to 8, characterized in that, The size of Q1 is related to at least one of the following parameters: The magnitude of N, the magnitude of Q, the modulation order, or the PAPR value of the first pilot sequence, wherein N is the number of symbols carrying the pilot.

10. The method according to any one of claims 1 to 9, characterized in that, The method further includes: Configure a first energy for the plurality of first subcarriers, and configure a second energy for the Q1 subcarrier groups. The ratio between the first energy and the second energy is a preset value or a value related to Q1.

11. A communication method, characterized in that, include: Receive first indication information, the first indication information being used to indicate the Q1 subcarrier groups that are activated in the Q subcarrier groups corresponding to the first symbol; Demodulate the first symbol according to the first instruction information. Wherein, the Q subcarrier groups are subcarrier groups formed by dividing the subcarriers in the first symbol into multiple first subcarriers, each subcarrier group including multiple second subcarriers, the multiple first subcarriers respectively carrying multiple first pilots, the Q1 subcarrier groups carrying frequency domain signals, the frequency domain signals being obtained from the data signals through Discrete Fourier Transform (DFT), the interval between the Pth first subcarrier and the (P+1)th first subcarrier being X second subcarriers, where P, Q1, and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q.

12. The method according to claim 11, characterized in that, The second subcarrier P and the second subcarrier P+1 in the first subcarrier group are spaced apart by X1 subcarriers. The first subcarrier group is one of the Q subcarrier groups, and X1 is a positive integer.

13. The method according to claim 12, characterized in that, The second subcarrier group consists of P second subcarriers and the (P+1)th second subcarrier, with a spacing of X2 subcarriers between them. The second subcarrier group is one of the Q subcarrier groups other than the first subcarrier group. Among them, X2 and X1 may be equal or unequal.

14. The method according to any one of claims 11 to 13, characterized in that, The method further includes: Obtain second indication information, which is used to indicate the pattern of the plurality of first subcarriers.

15. The method according to claim 14, characterized in that, The second indication information is used to indicate the density of the plurality of first subcarriers and the position of the first first subcarrier among the plurality of first subcarriers in the frequency domain resources.

16. The method according to claim 15, characterized in that, The second indication information indicates the density of the plurality of first subcarriers, including: the first indication information indicates 1 / X-1 and / or X.

17. The method according to any one of claims 11 to 16, characterized in that, The first indication information indicates the position of the Q1 subcarrier groups in the Q subcarrier groups.

18. The method according to claim 17, characterized in that, The position of the Q1 subcarrier groups within the Q subcarrier groups is related to at least one of the following: The identifier of the terminal device, the identifier of the cell, the index of the first symbol, the index of the time slot, the index of the subframe, the index of the frame, or the identifier of the partial bandwidth BWP.

19. The method according to any one of claims 11 to 18, characterized in that, The size of Q1 is related to at least one of the following parameters: The magnitude of N, the magnitude of Q, the modulation order, or the PAPR value of the first pilot sequence, wherein N is the number of symbols carrying the pilot.

20. A communication device, characterized in that, Includes a processor for executing computer programs or instructions to cause the communication device to perform the method as claimed in any one of claims 1 to 10, or to cause the communication device to perform the method as claimed in any one of claims 11 to 19.

21. The communication device according to claim 20, characterized in that, It also includes a memory for storing the computer program or instructions.

22. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1 to 19.

23. A chip system, characterized in that, Includes: a processor for retrieving and running a computer program from memory, causing a communication device equipped with the chip system to perform the method of any one of claims 1 to 19.

24. A computer program product, characterized in that, When the computer program product is run on a computer, it causes the computer to perform the method as described in any one of claims 1 to 19.

25. A communication device, characterized in that, Includes a module for performing the method according to any one of claims 1 to 19.

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