Communication method and communication device

Abstract

A communication method comprises: a first communication device determining first indication information indicating an activated Q1 subcarrier group in Q subcarrier groups corresponding to a first symbol, and sending the first indication information to a second communication device. The Q subcarrier groups are subcarrier groups divided by subcarriers except a plurality of first subcarriers in a first symbol, each subcarrier group comprises a plurality of second subcarriers, the plurality of first subcarriers respectively bear a plurality of first pilot frequencies, the Q1 subcarrier group bears frequency domain signals obtained by DFT (Discrete Fourier Transform) of data signals, and the Q subcarrier groups are subcarrier groups divided by subcarriers except the plurality of first subcarriers in the first symbol. The plurality of first subcarriers are uniformly distributed at intervals in the frequency domain, P, Q1 and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q. By indicating to activate the Q1 subcarrier group in the Q subcarrier groups in the first symbol, the PAPR of the first symbol can be improved, and the channel estimation performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0002] Single carrier has the advantage of lower peak to average power ratio (PAPR) compared to multi-carrier (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 waveform.

[0003] A packet-based DFT-s-OFDM scheme is to divide a data signal into multiple data signal groups, different data signal groups can be allocated to different terminal devices, each data signal group is independently subjected to discrete fourier transform (DFT) to obtain multiple frequency domain signal groups, and then each frequency domain signal group is equally spacedly mapped to a subcarrier in the frequency domain. After multiplexing the signals of all frequency domain signal groups, an inverse fast fourier transform (IFFT) is performed for transmission. The DFT-s-OFDM scheme can maintain that each data signal group is a single carrier waveform, and thus can maintain the characteristic of low PAPR of single carrier waveform. However, how to further reduce PAPR becomes a problem to be solved. SUMMARY

[0004] The present application provides a communication method to further reduce PAPR.

[0005] In a first aspect, a communication method is provided. The method can be performed by a first communication device. In the absence of special description, the "first communication device" in the present application can refer to the first communication device itself (for example, a network device), a component (for example, a processor, a chip, or a chip system, etc.) in the first communication device, or a logic module or software capable of realizing all or part of the functions of the first communication device. For ease of description, the following description takes the first communication device as an example.

[0006] The communication method comprises: determining first indication information, the first indication information being used for indicating Q1 activated subcarrier groups in Q subcarrier groups corresponding to a first symbol; and transmitting the first indication information, wherein the Q subcarrier groups are subcarrier groups into which subcarriers in the first symbol except for a plurality of first subcarriers are divided, each of the subcarrier groups comprises a plurality of second subcarriers, the plurality of first subcarriers respectively carry a plurality of first pilots, the Q1 subcarrier groups carry a frequency domain signal, the frequency domain signal is obtained by DFT transformation of a data signal, a Pth first subcarrier and a P+1th first subcarrier are separated by X second subcarriers, P, Q1, and X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q.

[0007] Optionally, the first symbol described above can be a DFT-s-OFDM symbol. Alternatively, the first symbol can be another symbol with a low PAPR characteristic of a single carrier, which is not limited in the present application.

[0008] Based on the technical solution described above, the first communication device can indicate, through the first indication information, Q1 activated subcarrier groups in the first symbol, the Q1 activated subcarrier groups carrying the frequency domain signal, and the Q1 activated subcarrier groups being part of the Q subcarrier groups corresponding to the first symbol. That is, subcarriers in the first symbol corresponding to the Q subcarrier groups except for a plurality of first subcarriers used for carrying pilots are divided into Q subcarrier groups, each of the Q subcarrier groups comprises a plurality of second subcarriers, the second subcarriers can be used for carrying the frequency domain signal, but the first communication device indicates, through the first indication information, the Q1 activated subcarrier groups, and the frequency domain signal is mapped on the Q1 activated subcarrier groups, and the frequency domain signal is not mapped on or the mapped frequency domain signal is 0 on the Q subcarrier groups except for the Q1 activated subcarrier groups. The PAPR of the first symbol can be improved, and the channel estimation performance can be improved.

[0009] In addition, the pilot and the data signal in the first symbol are transformed into the frequency domain signal by DFT to be transmitted in frequency division, which can reduce the interference between the pilot and the data signal, and further improve the channel estimation performance.

[0010] In combination with the first aspect, in some implementations of the first aspect, a Pth second subcarrier and a P+1th second subcarrier in a first subcarrier group are separated by X1 subcarriers, the first subcarrier group being one of the Q subcarrier groups, and X1 being a positive integer.

[0011] Based on the technical solution described above, the plurality of second subcarriers included in each of the Q subcarrier groups are uniformly distributed in the frequency domain, which can further improve the PAPR of the first symbol.

[0012] In some implementations of the first aspect, the P second subcarriers in the second subcarrier group and the (P+1)th second subcarrier are separated by X2 subcarriers, and X2 is equal to or different from X1.

[0013] According to the above technical solution, the number of second subcarriers included in different subcarrier groups in the Q subcarrier groups can be the same or different, thereby improving the flexibility of grouping.

[0014] 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.

[0015] According to the above technical solution, the first communication device can indicate the pattern of the first subcarriers to the second communication device through the second indication information, so that the first communication device and the second communication device reach a consensus on the position of the subcarriers capable of carrying pilots, and support the second communication device to correctly parse the received first symbol.

[0016] 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 a first first subcarrier in the plurality of first subcarriers in the frequency domain resource.

[0017] In some 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.

[0018] According to the above technical solution, the second indication information can achieve the purpose of indicating the pattern of the first subcarriers by indicating different information, thereby improving the flexibility of the solution.

[0019] In some implementations of the first aspect, the first indication information indicates the position of the Q1 subcarrier groups in the Q subcarrier groups.

[0020] According to the above technical solution, the first indication information can achieve the purpose of indicating the Q1 subcarrier groups in the Q subcarrier groups by indicating the position of the Q1 subcarrier groups in the Q subcarrier groups.

[0021] In some implementations of the first aspect, the position of the Q1 subcarrier groups in the Q subcarrier groups is related to at least one of the following information: an identifier of a terminal device, an identifier of a cell, an index of the first symbol, an index of a time slot, an index of a subframe, an index of a frame, or an identifier of a partial bandwidth BWP.

[0022] In combination with the first aspect, in certain 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.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: configuring a first energy for the multiple first subcarriers, and configuring a second energy for the Q1 subcarrier group, wherein the ratio between the first energy and the second energy is a preset value or a value related to Q1.

[0024] In a second aspect, 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 (for example, a terminal device), or a component in the second communication device (for example, a processor, a chip, or a chip system, etc.), or a logic module or software that can implement all or part of the functions of the second communication device. For ease of description, the following description uses the execution of the second communication device as an example.

[0025] The communication method includes: receiving first indication information, where the first indication information is used to indicate Q1 activated subcarrier groups among Q subcarrier groups corresponding to a first symbol; and demodulating the first symbol according to the first indication information, wherein the Q subcarrier groups are subcarrier groups into which subcarriers other than multiple first subcarriers in the first symbol are divided, each of the subcarrier groups includes multiple second subcarriers, the multiple first subcarriers respectively carry multiple first pilots, the Q1 subcarrier groups carry frequency domain signals, the frequency domain signals are obtained by DFT transformation of data signals, and there are 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.

[0026] In combination with the second aspect, in certain implementations of the second aspect, the Pth second subcarrier and the P+1th second subcarrier in the first subcarrier group are separated by X1 subcarriers, the first subcarrier group is one of the Q subcarrier groups, and X1 is a positive integer.

[0027] In combination with the second aspect, in certain implementations of the second aspect, the P second subcarriers and the P+1th second subcarrier in the second subcarrier group are separated by X2 subcarriers, and the second subcarrier group is one of the Q subcarrier groups except the first subcarrier group, where X2 and X1 are equal or unequal.

[0028] In a possible implementation of the second aspect, the method further includes: obtaining second indication information, the second indication information being used to indicate a pattern of the plurality of first subcarriers.

[0029] In a possible implementation of the second aspect, the second indication information is used to indicate a density of the plurality of first subcarriers and a location of a first first subcarrier in the plurality of first subcarriers on a frequency domain resource.

[0030] In a possible implementation 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.

[0031] In a possible implementation of the second aspect, the first indication information indicates a location of the Q1 subcarrier groups in the Q subcarrier groups.

[0032] In a possible implementation of the second aspect, the location of the Q1 subcarrier groups in the Q subcarrier groups is related to at least one of the following information: an identifier of a terminal device, an identifier of a cell, an index of the first symbol, an index of a slot, an index of a subframe, an index of a frame, or an identifier of a bandwidth part (BWP).

[0033] In a possible implementation of the second aspect, a size of the Q1 is related to at least one of the following parameters:

[0034] a size of N, a size of the Q, a modulation order, or a PAPR value of the first pilot sequence, where the N is a number of symbols carrying pilots.

[0035] The technical effects of the method shown in the above second aspect and possible designs thereof can refer to the technical effects in the first aspect and possible designs thereof.

[0036] In a third aspect, a communication apparatus is provided. The communication apparatus is configured to implement the above first aspect and any of the possible implementation modes thereof. Specifically, the communication apparatus includes a processor and a memory configured to store a computer program; the processor is configured to invoke and run the computer program from the memory, so that the communication apparatus implements the above first aspect and any of the possible implementation modes thereof.

[0037] In an implementation mode, the communication apparatus is a network device. When the communication apparatus is a network device, the transceiver can be a transceiver circuit, or the input / output interface can be an input / output circuit. The processing unit can be at least one processor.

[0038] In another implementation, the communication apparatus can be a chip, a chip system or a circuit in the network device. At this time, the transceiving unit can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit on the chip, the chip system or the circuit; and the processing unit can be at least one processor, a processing circuit or a logic circuit.

[0039] In a fourth aspect, a communication apparatus is provided. The communication apparatus is configured to implement the second aspect and any of the implementation forms thereof. Specifically, the communication apparatus comprises a processor and a memory configured to store a computer program; and the processor is configured to invoke and run the computer program from the memory, so that the network device implements the second aspect and any of the implementation forms thereof.

[0040] In an implementation form, the communication apparatus is a terminal device. When the communication apparatus is a terminal device, the transceiving 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 transceiving circuit. Optionally, the input / output interface can be an input / output circuit.

[0041] In another implementation, the communication apparatus can be a chip, a chip system or a circuit in the terminal device. At this time, the transceiving unit can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit on the chip, the chip system or the circuit; and the processing unit can be at least one processor, a processing circuit or a logic circuit.

[0042] In a fifth aspect, a computer readable storage medium is provided. The computer readable storage medium stores a computer program, which, when executed, causes the method of any of the implementation forms of the first aspect and the second aspect to be performed.

[0043] In a sixth aspect, a computer program product containing instructions is provided. When the computer program product is executed, the method provided by any of the implementation forms of the first aspect and the second aspect is performed.

[0044] In a seventh aspect, a chip is provided. The chip comprises a processor and a communication interface. The processor reads instructions through the communication interface, and executes the method provided by any of the implementation forms of the first aspect and the second aspect.

[0045] Optionally, as an implementation form, the chip further comprises a memory configured to store a computer program or instructions, and the processor is configured to execute the computer program or instructions stored on the memory, and when the computer program or instructions are executed, the processor is configured to execute the method provided by any of the implementation forms of the first aspect and the second aspect.

[0046] In an eighth aspect, a communication system is provided, comprising the communication apparatus of the third aspect and the communication apparatus of the fourth aspect.

[0047] In a ninth aspect, a computer program is provided. When the computer program is run, the method provided by any one of the implementation forms of the first aspect and the second aspect is executed. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 is a schematic diagram of a communication system suitable for the present application.

[0049] Figure 2 is a schematic diagram of a DFT-s-OFDM.

[0050] Figure 3 is a schematic diagram of a DFT-s-OFDM with frequency domain grouping.

[0051] Figure 4 is a schematic diagram of another DFT-s-OFDM with frequency domain grouping.

[0052] Figure 5 is a schematic flow chart of a communication method provided by an embodiment of the present application.

[0053] Figure 6 are schematic diagrams of a first symbol provided by an embodiment of the present application.

[0054] Figure 7 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application.

[0055] Figure 8 is a schematic diagram of another communication apparatus provided by an embodiment of the present application.

[0056] Figure 9 is a schematic diagram of a chip system provided by an embodiment of the present application.

[0057] Figure 10 is a schematic diagram of another chip system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0058] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0059] First, in the present application, “for indicating” can include for directly indicating and for indirectly indicating. When it is described that certain indication information is for indicating A, it can include that the indication information directly indicates A or indirectly indicates A, and does not mean that A must be carried in the indication information.

[0060] The information indicated by the indication information is referred to as to-be-indicated information. In a specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be only indicated in part, and other parts of the to-be-indicated information are known or agreed in advance. For example, the indication of specific information can also be implemented by means of the arrangement order of various information agreed in advance (for example, specified by a protocol), thereby reducing the indication overhead to a certain extent. Meanwhile, a common part of various information can be identified and uniformly indicated, so as to reduce the indication overhead caused by separately indicating the same information.

[0061] Secondly, in the present application, "at least one" refers to one or more, and "more" refers to two or more (including two). In addition, in the embodiments of the present application, "first", "second", and various numerical numbers (for example, "#1", "#2", and the like) are only used for differentiation for the convenience of description, and do not limit the scope of the embodiments of the present application. The size of the serial number of each process below does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. It should be understood that the objects thus described can be interchanged under appropriate circumstances, so as to be able to describe solutions other than the embodiments of the present application. In addition, in the embodiments of the present application, "S510" and the like are only used for identification for the convenience of description, and do not limit the order of execution steps.

[0062] Thirdly, in the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or having more advantages than other embodiments or design solutions. Rather, the words "exemplary" or "for example" are used in the sense of presenting a specific example.

[0063] Fourthly, in the embodiments of the present application, "storage" can refer to storage in one or more memories. The one or more memories can be separately arranged or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can be partially separately arranged and partially integrated in a decoder, a processor, or a communication device. The type of the memory can be any form of storage medium, and the present application does not limit this.

[0064] Fifthly, in the embodiments of the present application, the term "protocol" can refer to a standard protocol in the field of communication, which can include the NR protocol and related protocols applied in future communication systems, and the present application does not limit this.

[0065] Sixthly, in the embodiments of the present application, the terms "of", "corresponding", "corresponding" and "associate" can be used interchangeably at times, and it should be pointed out that the meanings expressed are consistent when the distinction is not emphasized.

[0066] Seventhly, in the embodiments of the present application, the terms "in the case of", "when", "if" can be used interchangeably at times, and it should be pointed out that the meanings expressed are consistent when the distinction is not emphasized.

[0067] Eighthly, the term "and / or" in the present application is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after it.

[0068] Ninthly, the terms "message", "information" or "information element (IE)" can be used interchangeably in the present application, and the names of messages or information are not limited in any way as long as the corresponding functions can be realized.

[0069] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, and "sending information" can include direct sending or indirect sending through other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, and "receiving information" can include direct reception from YY or indirect reception from YY through other units or modules. In addition, "sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, "sending" or "receiving" can be carried out between devices, for example, between network devices and terminal devices through the air interface, and "sending" or "receiving" can also be carried out within a device, for example, between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0070] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0071] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, 5th generation (5G) system or new radio (NR), and future communication systems, vehicle-to-X (V2X), which can include vehicle to network (V2N), vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), etc., LTE-V (long term evolution-vehicle), Internet of Vehicles, machine type communication (MTC), Internet of Things (IoT), LTE-M (long term evolution-machine), machine to machine (M2M), etc.

[0072] Figure 1 is a schematic diagram of a communication system suitable for the present application. As shown in Figure 1 , the communication system 100 includes at least one network device, for example Figure 1 , network device 111, network device 112, network device 113. The wireless communication system can also include at least one terminal device, for example Figure 1 , terminal device 121, terminal device 122, terminal device 123, terminal device 124, terminal device 125, terminal device 126, terminal device 127.

[0073] Exemplarily, communication can be carried out between the network device and the terminal device, including but not limited to: multi-site transmission, enhanced mobile broadband (eMBB) transmission, etc., wherein, as shown inFigure 1 The network device 112 and the network device 113 shown in FIG. 1 can perform multi-site transmission with the terminal device 124, and also, as shown in FIG. 1, the network device 112 can perform eMBB transmission with the terminal device 121, the terminal device 122, and the terminal device 123. Figure 1 The network device 112 shown in FIG. 1 can perform eMBB transmission with the terminal device 121, the terminal device 122, and the terminal device 123.

[0074] Exemplarily, the network devices can also communicate with each other, including but not limited to: backhaul, as shown in FIG. 1, the network device 111 can perform backhaul transmission with the network device 112, and the network device 111 can also perform backhaul transmission with the network device 113. Figure 1 The network device 111 and the network device 112 shown in FIG. 1 can perform communication through backhaul, and the network device 111 and the network device 113 can also perform communication through backhaul, wherein the network device 112 and the network device 113 can play the role of a relay node in the system.

[0075] Exemplarily, the terminal devices can also communicate with each other, including but not limited to: device-to-device (D2D) transmission, as shown in FIG. 1, the terminal device 122 can perform D2D transmission with the terminal device 125. Figure 1 The terminal device 122 shown in FIG. 1 can perform D2D transmission with the terminal device 125.

[0076] A network device is a network-side device with wireless transceiving function. The network device can be an apparatus in a radio access network (RAN) that provides wireless communication function for terminal devices. The network device can be a 3rd generation partnership project (3GPP)-related cellular system, such as a 5G mobile communication system, or a future-oriented evolved system (such as a 6G mobile communication system). The network device can also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. 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 base station in a subsequent evolution of 3GPP, a transmission reception point (TRP), an access node in a WiFi system, a wireless relay node, a wireless backhaul node, etc. In a communication system employing different radio access technologies (RATs), the name of the device with base station function can be different. For example, in an LTE system, it can be referred to as an eNB or eNodeB, and in a 5G system or NR system, it can be referred to as a gNB. The specific name of the base station is not limited in the present application. The network device can contain one or more co-sited or non-co-sited transmission reception points. For another example, the network device can 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).

[0077] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open RAN (ORAN) system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU (open DU), the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. Exemplarily, the functions of the CU can be implemented by one entity or different entities. For example, the functions of the CU are further divided, i.e., the control plane and the user plane are separated and implemented by different entities, which are a control plane CU entity (i.e., a CU-CP entity) and a user plane CU entity (i.e., a CU-UP entity), respectively. The CU-CP entity and the CU-UP entity can be coupled with the DU to jointly complete the functions of the access network device. For example, the CU is responsible for processing non-real-time protocols and services, implementing radio resource control (RRC), and the functions of the packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services, implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer and the physical (PHY) layer. In this way, part of the functions of the wireless access network device can be implemented by multiple network function entities. These network function entities can be network elements in a hardware device, or software functions running on a dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). The network device can also include an active antenna unit (AAU). The AAU implements part of the physical layer processing functions, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, in this architecture, high-layer signaling, such as RRC layer signaling, can also be considered as being sent by the DU, or by the DU+AAU. It can be understood that the network device can be a device including one or more of the CU node, the DU node and the AAU node. In addition, the CU can be divided into a network device in a radio access network (RAN), or the CU can be divided into a network device in a core network (CN), which is not limited in this application.For another example, in vehicle to everything (V2X) technology, the access network device can be a road side unit (RSU). A plurality of access network devices in a communication system can be base stations of the same type or base stations of different types. A base station can communicate with a terminal device directly or through a relay station. In embodiments of the present application, the device for implementing the function of a network device can be the network device itself, or a device capable of supporting the network device to implement the function, such as a chip system or a combination device or component capable of implementing the function of an access network device, which can be installed in the network device. In embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices.

[0078] The terminal device is a user-side device with wireless transceiver function, which can be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (such as a communication module, a modem, or a chip system) built into the above devices. The terminal device is used to connect people, things, machines, etc., 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, Internet of Things, virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, unmanned aerial vehicle, robot, etc. For example, the terminal device can be a handheld terminal in cellular communication, a communication device in D2D, an Internet of Things device in MTC, a monitoring camera in smart transportation and smart city, or a communication device on an unmanned aerial vehicle, etc. The terminal device can also be 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. The terminal device can also be a terminal device in an IoT system. IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network to realize human-machine interconnection and intelligent network of object-object interconnection. In the embodiments of the present application, IoT technology can achieve massive connection, deep coverage, and terminal power saving through, for example, narrow band (NB) technology. In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system or a combination device or component that can realize the function of the terminal device, which can be installed in the terminal device. The terminal device is usually provided with a communication module, circuit or chip for executing corresponding communication functions. The terminal device is also configured with program instructions for executing corresponding communication functions.

[0079] The network device and the terminal device can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; and can also be deployed on airplanes, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0080] Exemplarily, the communication system 100 can further include an application function (AF) network element, which is a control plane network function provided by an operator network, and is used to provide application layer information; and the communication system 100 can further include a session management function (SMF) network element, which is a control plane network function provided by an operator network. In the embodiment of the application, in the case where the communication system 100 includes the AF network element and the SMF network element, the AF can send service-related information to the network device through the SMF.

[0081] In order to facilitate understanding of the embodiments of the application, first, the basic concepts involved in the application are described.

[0082] 1. Peak to average power ratio (PAPR): The wireless signal is observed from the time domain as a sinusoidal wave with constantly changing amplitude, and the amplitude is not constant. The signal amplitude peak in one period is not the same as the amplitude peak in other periods, so the average power and the peak power of each period are not the same. In a long period of time, the peak power is the maximum transient power that occurs with a certain probability, and the probability is usually 0.01% (i.e. 10^-4). The ratio of the peak power at this probability to the total average power of the system is the PAPR.

[0083] PAPR is defined as the ratio of the maximum power of the signal envelope (P peak ) to the average power (P avg ), expressed in decibels (dB), that is

[0084]

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

[0086] 2. The harm of excessively high PAPR: The signal of the wireless communication system needs to be transmitted to a remote place and needs to be power amplified. Due to the limitation of technology and equipment cost, a power amplifier is often linearly amplified within a certain range, and if it exceeds this range, the signal will be distorted. Signal distortion can cause the receiving end of the received signal to be unable to correctly parse the signal. In order to ensure that the peak value of the signal is still within the linear range of the power amplifier that can normally amplify the power, it is necessary to reduce the average power of the transmitted signal. This way will cause the power amplifier to be low in efficiency, or equivalent to a smaller coverage range.

[0087] 3. OFDM: a sequence S d with N m symbols (equal to sm ) mapped to corresponding subcarriers, through weighting (that is, precoding, frequency domain windowing, power control, etc.), and then inverse Fourier transform to obtain time domain signal x m . Optionally, a cyclic prefix is added. Since the OFDM signal on a carrier is represented as a sinc function, there will be a tail on both sides. The tails of multiple carriers may, under certain probabilities, superimpose to form a point with very high peak power at a distance, that is, the use of OFDM waveform is prone to cause the problem of excessively high PAPR.

[0088] Therefore, in order to meet the coverage requirement, a signal generation technology with low PAPR needs to be selected.

[0089] 4. Single carrier: in order to reduce the PAPR of the OFDM waveform, a single carrier waveform can be used to transmit data. A single carrier can be understood as follows: a sequence S d with N m symbols is subjected to N d point Fourier transform to obtain a frequency domain signal S m , which is mapped to corresponding subcarriers, through weighting (that is, precoding, frequency domain windowing, power control, etc.), inverse Fourier transform, to obtain a time domain signal X m . Finally, a cyclic prefix is optionally added. The single carrier includes but is not limited to the following waveforms:

[0090] Single carrier-quadrature amplitude modulation (SC-QAM) waveform, single carrier-offset quadrature amplitude modulation (SC-OQAM) waveform, DFT-s-OFDM waveform, etc. In the embodiments of the present application, the network device and the terminal device can use the single carrier introduced above to communicate.

[0091] In the present application, the DFT-s-OFDM waveform is mainly involved, and the DFT-s-OFDM technology is introduced below.

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

[0093] DFT-s-OFDM waveform can be applied to uplink transmission, but in high frequency communication, due to the limitation of device capability, the PAPR problem is more serious, so DFT-s-OFDM waveform can also be applied to downlink transmission. Among them, the frequency band of high frequency communication can be 24250MHz to 52600MHz in the NR system, it can also be a frequency band above 52600MHz supported by the subsequent evolution of the NR system, or it can also be a higher frequency band of the next generation communication system, such as terahertz (THz) frequency band.

[0094] DFT-s-OFDM technology has a discrete Fourier transform (DFT) process before the OFDM processing process, so DFT-s-OFDM technology can also be called linear precoding OFDM technology. In order to facilitate understanding, the following Figure 2 Brief introduction of DFT-s-OFDM technology.

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

[0096] The transmitting end performs serial-to-parallel conversion, N-point DFT, subcarrier mapping, M-point IDFT (or IFFT), parallel-to-serial conversion, cyclic prefix addition, and digital-to-analog conversion (DAC) on the time-domain discrete sequence, and then transmits the signal through an antenna port and a channel.

[0097] The receiving end receives the signal through a channel and an antenna, and then performs analog-to-digital conversion (ADC), cyclic prefix removal, serial-to-parallel conversion, M-point DFT, subcarrier demapping, N-point IDFT, and parallel-to-serial conversion on the signal to obtain a time-domain discrete sequence.

[0098] The transmitting end can obtain a frequency-domain sequence of the time-domain discrete sequence through N-point DFT. The frequency-domain sequence is input into IDFT after subcarrier mapping, and M-point IDFT is performed, where N < M. Because the length of IDFT is greater than that of DFT, the part of IDFT that is not input is padded with zeros. After IDFT, cyclic prefix addition can avoid symbol interference.

[0099] DFT-s-OFDM has a lower PAPR than general OFDM, which can improve the power transmission efficiency of a mobile terminal, prolong the use time of a battery, and reduce the cost of a terminal.

[0100] 5. Frequency-domain grouping DFT-s-OFDM: Data signals are divided into multiple data signal groups, different data signal groups can be allocated to different UEs, and each data signal group is independently subjected to DFT to obtain a corresponding frequency-domain signal group. Then, the frequency-domain signals in the multiple frequency-domain signal groups are mapped onto subcarriers in the frequency domain at equal intervals, or in other words, the multiple frequency-domain signal groups are placed in the frequency domain in an interleaved manner. Finally, after multiplexing the signals of all frequency-domain signal groups, an IFFT is performed for transmission. This frequency-domain grouping DFT-s-OFDM method can maintain that the signal of each group is a single-carrier waveform, and thus a lower PAPR can be obtained.

[0101] 6. Pilot: also known as reference signal, the pilot involved in the present application includes but is not limited to the following reference signals:

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

[0103] The pilot in the present application can also be a reference signal capable of being carried on OFDM or single carrier in addition to the above-mentioned reference signals, which will not be illustrated one by one here.

[0104] The above is combined with Figure 1 The present application briefly introduces the scene to which the communication method provided by the embodiments of the present application can be applied, and introduces the basic concepts that may be involved in the embodiments of the present application, and introduces the concept of DFT-s-OFDM of frequency domain grouping in the basic concepts, a DFT-s-OFDM mode of frequency domain grouping is as shown in Figure 3 From Figure 3 It can be seen that the data signal is divided into n data signal groups (such as data signal group #1, data signal group #2 and data signal group #n shown in Figure 3 , the n data signal groups are independently subjected to DFT to obtain n frequency domain signal groups (such as frequency domain signal group #1, frequency domain signal group #2 and frequency domain signal group #n shown in Figure 3 ), and the frequency domain signals in the n frequency domain signal groups are equally spaced and mapped onto the subcarriers in the frequency domain, such as Figure 3The frequency domain signals in different frequency domain signal groups shown in FIG. 1 are interleaved in the frequency domain. Finally, the IFFT is performed and transmitted. Wherein, the plurality of subcarriers mapping a plurality of frequency domain signals in a certain frequency domain signal group can be a group of subcarriers. For example, the frequency domain signal group #1 is mapped to a plurality of subcarriers #1 in the frequency domain at equal intervals, which can be referred to as a subcarrier group #1; the frequency domain signal group #2 is mapped to a plurality of subcarriers #2 in the frequency domain at equal intervals, which can be referred to as a subcarrier group #2; and the frequency domain signal group #n is mapped to a plurality of subcarriers #n in the frequency domain at equal intervals, which can be referred to as a subcarrier group #n.

[0105] The above Figure 3 In the DFT-s-OFDM scheme of the frequency domain grouping shown in FIG. 1, the different subcarrier groups considered are frequency domain signals obtained by DFT of data signals for transmission of different UEs. Other functions of the subcarrier groups are not considered, such as considering some subcarrier groups as mapping pilot signals, for single-symbol physical downlink control channel (PDCCH) and / or physical uplink control channel (PUCCH) transmission.

[0106] Another DFT-s-OFDM scheme of frequency domain grouping is shown in FIG. 2, where the different subcarrier group grouping is for transmission of data signals for different UEs. Some subcarrier groups can map pilot signals. Figure 4

[0107] The above Figure 3 and Figure 4 The DFT-s-OFDM scheme of frequency domain grouping described above can keep each signal group (such as data signals and / or pilot signals) as a single-carrier waveform, so as to keep the characteristics of low PAPR of the single-carrier waveform. However, in some scenarios, it is necessary to further reduce the PAPR to meet the coverage requirements in the scenario, for example, in a short packet transmission scenario, the PAPR can be reduced to meet the coverage requirements, where the short packet transmission can be understood as a scenario where the DFT-s-OFDM symbol is short (for example, the number of DFT-s-OFDM symbols is less than or equal to 10).

[0108] The present application provides a communication method to reduce the PAPR.

[0109] The communication method provided by the embodiments of the present application can be applied to a system communicating through multi-antenna technology, for example, the communication system 100 shown in FIG. 1. The communication system can include at least one network device and at least one terminal device. Figure 1

[0110] ​​The embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application, as long as the execution subject can communicate according to the method provided by the embodiments of the present application by running a program in which the code of the method provided by the embodiments of the present application is recorded. For example, the method provided by the embodiments of the present application can be executed by a first communication device. In the case where no specific description is made, the "first communication device" in the present application can refer to the first communication device itself (for example, a network device or a terminal device), or can be a component (for example, a processor, a chip, or a chip system) in the first communication device, or can be a logic module or software capable of realizing all or part of the function of the first communication device. For another example, the method provided by the embodiments of the present application can be executed by a second communication device. In the case where no specific description is made, the "second communication device" in the present application can refer to the second communication device itself (for example, a network device or a terminal device), or can be a component (for example, a processor, a chip, or a chip system) in the second communication device, or can be a logic module or software capable of realizing all or part of the function of the second communication device.

[0111] Figure 5 is a schematic flowchart of a communication method provided by the embodiments of the present application, including the following steps:

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

[0113] Exemplarily, in the case where no specific description is made, the first communication device in the present application is a device for generating and sending 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, which can realize corresponding functions, and the present application does not make any limitation on this.

[0114] Optionally, the first symbol described above can be a DFT-s-OFDM symbol. Alternatively, the first symbol can be other symbol with low PAPR characteristic of single carrier, and the present application does not make any limitation on this.

[0115] The first symbol in the present application can be understood as a time domain resource. The first symbol is a time domain unit in time domain, which can also be called a time domain unit or other names. The name of the time domain unit in the present application is not limited, as long as it meets the provisions in the embodiments. In order to facilitate the description, the first symbol is taken as an example for description.

[0116] Specifically, the first indication information is used to indicate Q1 activated subcarrier groups in the Q subcarrier groups corresponding to the first symbol, each of which includes a plurality of second subcarriers. In the absence of special instructions, the subcarrier groups activated in the present application carry non-0 frequency domain signals, and the non-activated subcarrier groups do not carry frequency domain signals or carry 0 frequency domain signals. The frequency domain signal is obtained by DFT transformation of the data signal.

[0117] For example, in the absence of special instructions, the first subcarrier in the present application can also be referred to as a pilot subcarrier, that is, a subcarrier used to carry a pilot signal, and the first communication device can map and send the pilot on the first subcarrier; the second subcarrier can also be referred to as a data subcarrier, that is, a subcarrier that can be used to carry the frequency domain signal obtained by DFT transformation of the data signal, and the first communication device can map and send the frequency domain signal on the second subcarrier in the Q1 subcarrier groups.

[0118] Optionally, in the absence of special instructions, the Q subcarrier groups in the present application are the grouping number indicated by the first communication device, or the Q subcarrier groups are a pre-defined grouping number, or the Q subcarrier groups are a grouping number associated with the frequency domain interval of the pilot. For example, the first communication device indicates the pattern of the Q subcarrier groups corresponding to the first symbol through information #1; for another example, the pattern of the Q subcarrier groups corresponding to the first symbol is pre-defined or pre-configured; for another example, the frequency domain interval of the pilot in the first symbol is Q, and the data subcarriers corresponding to the first symbol can be divided into Q groups.

[0119] A plurality of first subcarriers in the subcarriers corresponding to the first symbol carry a plurality of first pilots, respectively, and the subcarriers in the subcarriers corresponding to the first symbol except the plurality of first subcarriers are divided into Q subcarrier groups, each of which includes a plurality of second subcarriers, and Q1 of the Q subcarrier groups are activated. Wherein, the interval between the Pth first subcarrier and the P+1th first subcarrier is X second subcarriers, P, Q1, X are positive integers, Q is a positive integer greater than 1, and Q1 is a positive integer less than Q. Wherein, the subcarriers corresponding to the first symbol can be understood as: the subcarriers within the first symbol, that is, the subcarriers included in the time domain range of the first symbol.

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

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

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

[0123] Optionally, the first subcarrier group is one of the Q subcarrier groups, and the plurality of second subcarriers in another subcarrier group of the Q subcarrier groups can also be uniformly and discretely distributed in the frequency domain. For example, a Pth second subcarrier and a 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 the X1 subcarriers include the first subcarrier and / or the second subcarrier, and the X2 subcarriers include the first subcarrier and / or the second subcarrier.

[0124] For ease of understanding, the pattern of the first subcarriers and the second subcarriers in the first symbol in this embodiment is introduced in conjunction with Figure 6

[0125] From (a) in Figure 6 It can be seen from (a) in that the plurality of 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 spacing between the two consecutive second subcarriers in each of the Q subcarrier groups is the same. As shown in (a) in Figure 6 The spacing between the two consecutive second subcarriers in the plurality of second subcarriers included in the first subcarrier group is 3 subcarriers, the spacing between the two consecutive second subcarriers in the plurality of second subcarriers included in the second subcarrier group is 3 subcarriers, and the spacing between the two consecutive second subcarriers in the plurality of second subcarriers included in the third subcarrier group is 3 subcarriers.

[0126] From (b) in Figure 6 It can be seen from (b) in that the plurality of 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 spacing between the two consecutive second subcarriers in different subcarrier groups of the Q subcarrier groups can be different. As shown in (b) in Figure 6 The spacing between the two consecutive second subcarriers in the plurality of second subcarriers included in the first subcarrier group is 1 subcarrier, and the spacing between the two consecutive second subcarriers in the plurality of second subcarriers included in the second subcarrier group is 3 subcarriers.

[0127] ​By way of example and not limitation, the first indication information indicating Q1 subcarrier groups being activated from the Q subcarrier groups can be: the first indication information indicating a pattern of the Q1 subcarrier groups from the Q subcarrier groups.

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

[0129] By way of example, in this implementation, the first indication information can directly indicate the positions of the Q1 subcarrier groups in the Q subcarrier groups. For example, the first indication information indicates that the Q1 subcarrier groups are the first and second subcarrier groups from the Q subcarrier groups.

[0130] By way of example, in this implementation, the first indication information can indirectly indicate the pattern of the Q1 subcarrier groups by indicating the positions of the Q1 subcarrier groups in the Q subcarrier groups and at least one of the following information:

[0131] an identity of the terminal device (UE ID), an identity of the cell (Cell ID), an index of the first symbol, an index of the slot, an index of the subframe, an index of the frame, or an identity of the bandwidth part (BWP), etc.

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

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

[0134] For another example, when the Cell ID is 1, the Q1 subcarrier groups are the first subcarrier groups from the Q subcarrier groups. When the Cell ID is 2, the Q1 subcarrier groups are the second subcarrier groups from the Q subcarrier groups.

[0135] For yet another example, when the index of the first symbol is 1, the Q1 subcarrier groups are the first subcarrier groups from the Q subcarrier groups. When the index of the first symbol is 2, the Q1 subcarrier groups are the second subcarrier groups from the Q subcarrier groups.

[0136] Exemplarily, in this implementation, the first indication information can indicate the position of the Q1 subcarrier groups in the Q subcarrier groups and at least one of the following information by indicating an index, so as to indirectly indicate the Q1 subcarrier group pattern. For example, the Q1 subcarrier groups can be an index mapping function of a subcarrier group number, and different indexes activate subcarrier groups in different positions.

[0137] Optionally, 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 pilots. The association between the size of Q1 and the above parameters can be embodied in the form of a table, a condition, or a formula.

[0138] Exemplarily, the more the number of symbols carrying pilots in a single transmission process, the smaller the value of Q1, so that the PAPR can be better. The fewer the number of symbols carrying pilots in a single transmission process, the larger the value of Q1 can be.

[0139] For example, the number of symbols carrying pilots is 1, and the Q subcarrier groups corresponding to the symbol can all be activated or most of them can be activated. For example, the symbols carrying pilots include symbol #1, and the 3 subcarrier groups corresponding to the symbol #1 can be activated.

[0140] For another example, the number of symbols carrying pilots is greater than 1, and part or all of the subcarrier groups corresponding to each symbol are activated to ensure low PAPR, wherein 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 example, the symbols carrying pilots include symbol #1 and symbol #2, the 3 subcarrier groups #1 corresponding to the symbol #1, and the 3 subcarrier groups #2 corresponding to the symbol #2. Two subcarrier groups #1 in the 3 subcarrier groups #1 can be activated, two subcarrier groups #2 in the 3 subcarrier groups #2 can be activated, or three subcarrier groups #3 in the 3 subcarrier groups #2 can be activated.

[0141] Exemplarily, when the total number of subcarrier groups is small, the subcarrier groups corresponding to the symbol can all be activated; when the total number of subcarrier groups is large, the subcarrier groups corresponding to the symbol can be partially or fully activated, so that better PAPR can be obtained. For example, when the total number of subcarrier groups corresponding to symbol #1 is 2, the subcarrier groups corresponding to the symbol #1 can all be activated; for another example, when the total number of subcarrier groups corresponding to symbol #1 is 4, two or more of the four subcarrier groups corresponding to the symbol #1 can be activated.

[0142] Exemplarily, when the modulation order is low, the number of the groups of the subcarriers corresponding to the symbol activated is small, and the PAPR is ensured to be less lifted. For example, when the modulation order corresponding to the symbol #1 is 3, 2 groups of the 4 groups of the subcarriers corresponding to the symbol #1 can be activated; for another example, when the modulation order corresponding to the symbol #1 is 5, 3 or 4 groups of the 4 groups of the subcarriers corresponding to the symbol #1 can be activated.

[0143] Exemplarily, when the PAPR of the first pilot sequence is low, more groups of the subcarriers can be activated, i.e., the value of Q1 is larger, because the low PAPR pilot sequence is used, and the PAPR is lower, and more groups of the subcarriers can be activated. For example, the first pilot is a Pi / 2 BPSK modulated m sequence, and 3 or 4 groups of the 4 groups of the subcarriers corresponding to the symbol #1 can be activated. For another example, the first pilot is a ZC sequence, and 2 groups of the 4 groups of the subcarriers corresponding to the symbol #1 can be activated. Wherein, the PAPR of the Pi / 2 BPSK modulated m sequence is lower than that of the ZC sequence.

[0144] Optionally, without special description, in the present application, the PAPR can be improved, and the trade-off between the channel estimation performance and the detection performance can be improved by setting the energy ratio of the frequency domain signal and the pilot. For example, the first energy is configured for the plurality of first subcarriers, and the second energy is configured for the Q1 groups of the subcarriers, wherein the ratio between the first energy and the second energy is a preset value or a value related to Q1, wherein the first energy configured for the plurality of first subcarriers can be understood as the preconfigured signal power of the pilot signal; the second energy configured for the Q1 groups of the subcarriers can be understood as the preconfigured signal power of the data signal.

[0145] By way of example and not limitation, the preconfigured signal power of the pilot signal, Q1 and the preconfigured signal power of the data signal satisfy the following relationship:

[0146] 10log10(A / (Q1-1)B)dB, wherein A represents the preconfigured signal power of the pilot signal, Q1 represents the number of the activated subcarriers, and B represents the preconfigured signal power of the data signal.

[0147] Further, in the embodiment, after the first communication device determines the first indication information, the first communication device can send the first indication information to the second communication device, and then Figure 5 The method flowchart also includes:

[0148] S520, the first communication device sends the first indication information to the second communication device, and correspondingly, the second communication device receives the first indication information from the first communication device.

[0149] The manner in which the first communication device sends the first indication information to the second communication device is not limited in this embodiment, and can refer to the description of the information transmission between the existing or future communication devices.

[0150] As a possible implementation manner, the first communication device can send the first indication information to the second communication device at the same time when the first symbol is sent to the second communication device; or the first communication device can send the first indication information to the second communication device after the first symbol is sent to the second communication device; or the first communication device can send the first indication information to the second communication device before the first symbol is sent to the second communication device.

[0151] As another possible implementation manner, the first indication information can be predefined, for example, the protocol predefines the indication of the Q1 subcarrier groups activated in the Q subcarrier groups, and the first communication device and the second communication device can know the Q1 activated subcarrier groups based on the predefined or preconfigured first indication information. In this implementation manner, the second communication device can know the subcarrier group carrying the frequency domain signal 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 indication information.

[0153] Corresponding to the above-mentioned first symbol format (for example, the Q1 activated subcarrier groups in the Q subcarrier groups in the first symbol shown in the above), after receiving the first symbol, the second communication device can know the positions of the pilot subcarriers and the data subcarriers in the frequency domain in the first symbol based on the first indication information, and analyze the first symbol.

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

[0155] Exemplarily, in order to enable the second communication device to correctly analyze the first symbol after receiving the first symbol, the first communication device and the second communication device can reach a consensus on the positions of the pilot subcarriers in the first symbol, and then Figure 5 The method flowchart shown can further include:

[0156] S511, the first communication device sends second indication information to the second communication device, and correspondingly, the second communication device receives the second indication information from the first communication device.

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

[0158] Optionally, the second indication information can indicate the density of the 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 can be used to indicate the density of the first subcarriers and the position of the first first subcarrier in the frequency domain resource.

[0159] In addition, the density of the pilot subcarriers in the first symbol, and / or the starting position of the pilot subcarriers in the first symbol in the frequency domain resource can be pre-defined in the protocol.

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

[0161] If the density of the pilot subcarriers in the first symbol is pre-defined in the protocol, the second indication information can only indicate the starting position of the pilot subcarriers in the first symbol in the frequency domain resource; or if the starting position of the pilot subcarriers in the first symbol in the frequency domain resource is pre-defined in the protocol, the second indication information can only indicate the density of the pilot subcarriers in the first symbol; or if 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 resource are both pre-defined, the second indication information can not be sent.

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

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

[0164] For example, in the case where the second indication information indicates 1 / X-1, the density of the first subcarriers can be obtained based on the second indication information.

[0165] For another example, in the case where the first indication information indicates X+1, it can be learned based on the second indication information that there is one first subcarrier every X+1 subcarriers, and the density of the first subcarriers can be indirectly determined as 1 / m based on X+1.

[0166] For another example, in the case where the first indication information indicates X, it can be learned based on the second indication information that the Pth first subcarrier and the P+1th first subcarrier are separated by X second subcarriers, and the density of the first subcarriers can be indirectly determined as 1 / X-1 based on X.

[0167] Exemplarily, the second indication information indicates a position of a first first subcarrier in a frequency domain resource (e.g., a RB), so as to indicate the position of the pilot subcarrier in the first symbol.

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

[0169] An identifier of the terminal device (UE ID), an identifier of the cell (Cell ID), an index of the first OFDM symbol, an index of the time slot, an index of the subframe, an index of the frame, or an identifier of a bandwidth part (BWP), etc. For example, the starting position of the pilot subcarrier in the RB is related to mod(X, m). Wherein, m represents the density of the pilot subcarrier 1 / m. X is a combination of one or more of the above parameters, such as the sum of the parameters. In this way, the interference between users and between cells can be reduced, and the pilot subcarriers can be allocated on different subcarriers.

[0170] Figure 5 In the illustrated communication method, the first communication device can indicate, by the first indication information, a first symbol in which a Q1 activated subcarrier group is activated, the Q1 activated subcarrier group carries a frequency domain signal, and the Q1 activated subcarrier group is part of the Q subcarrier groups corresponding to the first symbol. The subcarriers in the first symbol, except for the first subcarriers used to carry the pilot, are divided into Q subcarrier groups, each of the Q subcarrier groups includes a plurality of second subcarriers, and the second subcarriers can be used to carry the frequency domain signal. However, the first communication device indicates, by the first indication information, the Q1 activated subcarrier group, and the frequency domain signal is mapped on the Q1 activated subcarrier group, and the frequency domain signal is not mapped on the Q1 activated subcarrier group or the frequency domain signal mapped is 0. The PAPR of the first symbol can be improved, and the channel estimation performance can be improved.

[0171] The size of the serial number of each process does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0172] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referred to if there is no special description and no logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0173] In some embodiments described above, the devices (e.g., the first communication device, the second communication device, etc.) are exemplarily described by taking the devices in the existing network architecture as examples. The specific forms of the devices are not limited in the embodiments of the present application. For example, devices having the same functions in the future are also applicable to the embodiments of the present application.

[0174] It can be understood that, in each of the above method embodiments, the methods and operations implemented by the devices (e.g., the first communication device, the second communication device) can also be implemented by components (e.g., chips or circuits) of the devices.

[0175] The communication method provided by the embodiments of the present application is described in detail above. Figure 5 and Figure 6 The communication method provided by the embodiments of the present application is described in detail above.

[0176] Those skilled in the art should understand that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is realized in the form of hardware or 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 realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0177] The communication device provided by the embodiments of the present application is described in detail below. Figure 7 to Figure 10 The description of the device embodiments corresponds to the description of the method embodiments, and therefore, the content not described in detail can be referred to the method embodiments described above, and some content will not be described again for the sake of brevity.

[0178] The embodiments of the present application can divide the functional modules of the communication device according to the method examples described above, for example, each functional module can be divided according to each function, or two or more functions can be integrated in one processing module. The integrated module can be realized in the form of hardware, software functional module, or a combination of software and hardware. The division of the modules in the embodiments of the present application is illustrative, and is only a logical function division. When actually implemented, another division manner can be used. The following takes the example of dividing each functional module according to each function.

[0179] Figure 7 is an exemplary block diagram of the communication device 10 provided by the embodiments of the present application.

[0180] As Figure 7As shown, the communication device 10 can include, for example, 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 capability. In implementation, the steps (e.g., steps S510 and S530 in the above method) can be completed by integrated logic circuits of hardware or instructions in the form of software in the chip system 110. Figure 5

[0182] By way of example, and not limitation, the chip system 110 can include a circuit or chip responsible for signal processing (e.g., 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).

[0183] Optionally, the chip system 110 can also be provided with a memory (e.g., a cache) for storing instructions and data. In some embodiments, the memory in the chip system 110 is a cache memory. The memory can save instructions or data that have just been used or recycled by the chip system 110. If the chip system 110 needs to use the instructions or data again, it can be directly called from the memory. This avoids repeated access and reduces the waiting time of the chip system 110, thus improving the efficiency of the system.

[0184] In some embodiments, the chip system 110 can include one or more interfaces. The interfaces can 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] ​The memory 120 may include random access memory (RAM) and read-only memory (ROM). The memory 120 may store computer-readable and computer-executable code, which includes instructions that, when executed, cause the processor to perform various functions described herein.

[0186] Alternatively, the code may include instructions for implementing various aspects of the present application, including instructions for supporting the generation of a first symbol or parsing a first symbol. The code may be stored in a non-transitory computer-readable medium such as a system memory or other types of memory. In some cases, the code may not be directly executed by the chip system 110, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, the memory 120 may include a basic I / O system that can control basic hardware or software operations, such as interaction with peripheral components or devices.

[0187] Exemplarily, 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 example, when the communication device 10 transfers files with other devices (other devices 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 method provided in the embodiments of the present application.

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

[0189] The bus 130 may be a universal serial bus (USB) for supporting mutual communication between various components in the communication device 10 .

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

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

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

[0193] In one design, the communication apparatus 20 can correspond to the first communication device in the above method embodiments.

[0194] The apparatus 10 can implement the steps or procedures performed by the first communication device in the above method embodiments, where the transceiver 150 can be used to perform the transceiving related operations of the first communication device in the above method embodiments, e.g., performing steps S511 and S520 in the above method embodiments; and the chip system 110 can be used to perform the processing related operations of the first communication device in the above method embodiments, e.g., performing step S510 in the above method embodiments.

[0195] In another design, the communication apparatus 10 can correspond to the second communication device in the above method embodiments.

[0196] The apparatus 10 can implement the steps or procedures performed by the second communication device in the above method embodiments, where the transceiver 150 can be used to perform the transceiving related operations of the second communication device in the above method embodiments, e.g., performing steps S511 and S520 in the above method embodiments; and the chip system 110 can be used to perform the processing related operations of the second communication device in the above method embodiments, e.g., performing step S530 in the above method embodiments.

[0197] Under this design, the communication apparatus 10 can include modules such as the short-range communication module 164, the sensor 161, the display 162, or the camera 163 as shown in Figure 7

[0198] The short-range communication module 164 can include modules supporting short-range communication such as WI-FI, Bluetooth, etc.

[0199] ​The sensor 161 can include a pressure sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, etc.

[0200] The display 162 is configured to display images, videos, etc. The display includes a display panel. The display panel can employ a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flex light-emitting diode (FLED), a Miniled, a MicroLed, a Micro-oLed, a quantum dot light emitting diodes (QLED), etc. For example, in an embodiment, the display can be configured to display interfaces required to be displayed by the communication device 10. For example, the communication device 10 can implement the display function by means of a GPU, the display, an application processor, etc. The GPU is a microprocessor for image processing, which is connected to the display and the application processor. The GPU is configured to perform mathematical and geometric calculations for graphics rendering. The chip system 110 can include one or more GPUs, which execute program instructions to generate or change display information.

[0201] The camera 163 is configured to acquire images, videos, etc.

[0202] It can be understood that, Figure 7 The structures shown do not constitute specific limitations on the communication device 10, and the specific structures of the terminal device and / or the network device can be referred to Figure 7 In some embodiments, the communication device 10 can also include more or fewer components than Figure 7 shown, or combine some components, or split some components, or different component arrangements, etc. Alternatively, Figure 7 Some components shown can be implemented in hardware, software, or a combination of software and hardware, and the terminal device and / or the network device can be added or reduced components on the basis of the structures given. Figure 7

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

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

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

[0206] The baseband unit 210 further includes a receiving unit 201, a management unit 202, and a sending unit 203. The management unit 202 includes the one or more Figure 8 , and the like. The subunits shown in FIG. 2 (e.g., a symbol generation subunit and a symbol parsing subunit, wherein the symbol generation subunit can be used to generate the first symbol in the above-described method embodiment, and the symbol parsing subunit can be used to parse the first symbol in the above-described method embodiment) can be included. 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 sending unit 203 can be referred to as transceiver units.

[0207] When the communication device 20 is used to implement the functions of the first communication device in the above-mentioned 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] Exemplarily, when the communication apparatus 20 is configured to implement the function of the first communication device in the above method embodiments. The management unit 202 is configured to determine first indication information, the first indication information being used to indicate Q1 activated subcarrier groups in Q subcarrier groups corresponding to a first symbol. The sending unit 203 is configured to send the first indication information, wherein the Q subcarrier groups are subcarrier groups into which subcarriers in the first symbol except for a plurality of first subcarriers are divided, each of the subcarrier groups comprises 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, a Pth first subcarrier and a P+1th first subcarrier are separated by X second subcarriers, 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 apparatus 20 is configured to perform the method in Figure 5 , the receiving unit 201 can be configured to perform the step of receiving information in the method; the management unit 202 can be configured to perform the processing step in the method, such as step S510; and the sending unit 203 can be configured to perform the step of sending information in the method, such as steps S511 and S520.

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

[0211] Exemplarily, when the communication apparatus 20 is configured to implement the function of the second communication device in the above method embodiments. The receiving unit 201 is configured to receive first indication information, the first indication information being used to indicate Q1 activated subcarrier groups in Q subcarrier groups corresponding to a first symbol; and the management unit 202 is configured to demodulate the first symbol according to the first indication information, wherein the Q subcarrier groups are subcarrier groups into which subcarriers in the first symbol except for a plurality of first subcarriers are divided, each of the subcarrier groups comprises 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, a Pth first subcarrier and a P+1th first subcarrier are separated by X second subcarriers, 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 apparatus 20 is configured to perform the method in Figure 5When the method in the above method is implemented by the communication apparatus, the receiving unit 201 can be configured to perform the step of receiving information in the method, such as steps S511 and S520; the management unit 202 can be configured to perform the processing step in the method, such as step S530; and the sending unit 203 can be configured to perform the step of sending information in the method.

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

[0214] As described above, the communication apparatus shown in Figure 7 may include a chip system. In the absence of special description, the above-mentioned "second communication device" can refer to the second communication device itself, or can refer to a device capable of supporting the first communication device to realize its functions. Alternatively, the second communication device can be an access network device; or the second communication device can be a chip system in the access network device.

[0215] In addition, in the absence of special description, the above-mentioned "first communication device" can refer to the first communication device itself, or can refer to a device capable of supporting the first communication device to realize its functions. Alternatively, the first communication device can be a terminal device; or the first communication device can be a chip system in the terminal device.

[0216] By way of example and without limitation, the chip system in the present application is as shown in Figure 9 , Figure 9 is a schematic block diagram of the chip system 30 provided by the embodiments of the present 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 also can be called a 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 Figure 9The processor 310 can be coupled to the memory 320 and invoke instructions in the memory 320, so that the chip system can implement the methods and functions of the embodiments of the present application. The input / output interface 330 can be an input / output circuit in the chip system, output information processed by the chip system, or input data or signaling information to be processed by the chip system.

[0219] As an example, the chip system is configured to implement operations performed by the first communication device or the second communication device in the above method embodiments.

[0220] For example, the processor 310 is configured to implement processing-related operations performed by the first communication device or the second communication device in the above method embodiments, which can be implemented as described above. Figure 5 For example, the input / output interface 330 is configured to implement sending and / or receiving-related operations performed by the first communication device or the second communication device in the above method embodiments, which can be implemented as described above. Figure 5 For example, the input / output interface 330 is configured to implement sending and / or receiving-related operations performed by the first communication device or the second communication device in the above method embodiments, which can be implemented as described above.

[0221] As an example, but not limitation, the chip system in the present application is as shown in Figure 10 Figure 10 is a schematic block diagram of the chip system 40 provided by the embodiments of the present application.

[0222] As can be seen from Figure 10 , the chip system (or also referred to as a processing system) includes an input / output interface 410 and a logic circuit 420. The input / output interface 410 can be an input / output circuit in the chip system, output information processed by the chip system, or input data or signaling information to be processed by the chip system, which can be implemented as described above. Figure 5 For example, the input / output interface 410 is configured to implement sending and / or receiving-related operations performed by the first communication device or the second communication device in the above method embodiments, which can be implemented as described above. Figure 5 For example, the input / output interface 410 is configured to implement sending and / or receiving-related operations performed by the first communication device or the second communication device in the above method embodiments, which can be implemented as described above.

[0223] As an example, the chip system is configured to implement operations performed by the first communication device or the second communication device in the above method embodiments.

[0224] For example, the logic circuit 420 is configured to implement processing-related operations performed by the first communication device or the second communication device in the above method embodiments; the input / output interface 410 is configured 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] The embodiments of the present application further provide a computer readable storage medium, which stores computer instructions for implementing the method executed by the device in the above-mentioned method embodiments.

[0226] For example, the computer program is executed by a computer, so that the computer can implement the method executed by the terminal device or the network device in the above-mentioned method embodiments.

[0227] The embodiments of the present application further provide a computer program product, which contains instructions, and the instructions are executed by a computer to implement the method executed by the terminal device or the network device in the above-mentioned method embodiments.

[0228] The embodiments of the present application further provide a communication system, which comprises the terminal device and the network device mentioned above.

[0229] The explanations and beneficial effects of the related contents in any of the above-mentioned apparatuses can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0230] Those skilled in the art can understand that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solutions. 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 the present application.

[0231] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-mentioned system, apparatus and unit can refer to the corresponding processes in the above-mentioned method embodiments, and will not be repeated here.

[0232] In several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method can be implemented by other ways. For example, the above-mentioned apparatus embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, apparatus or unit, and can be electrical, mechanical or other forms.

[0233] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0234] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0235] The functions, if realized in the form of software functional units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or the parts of the present application that essentially contribute to the prior art or the parts of the technical solutions can be embodied in the form of software products. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

Claims

1. A communication method characterized by comprising: The method comprises: determining first indication information, the first indication information being used for indicating Q1 subcarrier groups activated in Q subcarrier groups corresponding to a first symbol; sending the first indication information, wherein the Q subcarrier groups are subcarrier groups into which subcarriers in the first symbol except for a plurality of first subcarriers are divided, each of the subcarrier groups comprises 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 discrete Fourier transform (DFT) transformation of data signals, a Pth first subcarrier and a P+1th first subcarrier are separated by X second subcarriers, 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 of claim 1, wherein, A Pth second subcarrier and a P+1th second subcarrier in a first subcarrier group are separated by X1 subcarriers, the first subcarrier group is one of the Q subcarrier groups, and X1 is a positive integer.

3. The method of claim 2, wherein, A Pth second subcarrier and a P+1th second subcarrier in a second subcarrier group are separated by X2 subcarriers, the second subcarrier group is one of the Q subcarrier groups except for the first subcarrier group, wherein X2 is a positive integer, and X2 is equal to or different from X1.

4. The method according to any one of claims 1 to 3, characterized in that, The method further comprises: sending second indication information, the second indication information being used for indicating a pattern of the plurality of first subcarriers.

5. The method of claim 4, wherein, The second indication information is used for indicating a density of the plurality of first subcarriers and a position of a first first subcarrier in the plurality of first subcarriers in a frequency domain resource.

6. The method of claim 5, wherein, The second indication information indicates the density of the plurality of first subcarriers, comprising: 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 positions of the Q1 subcarrier groups in the Q subcarrier groups.

8. The method of claim 7, wherein, The positions of the Q1 subcarrier groups in the Q subcarrier groups are related to at least one of the following information: an identifier of a terminal device, an identifier of a cell, an index of the first symbol, an index of a time slot, an index of a subframe, an index of a frame, or an identifier of a partial bandwidth (BWP).

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

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

11. A communication method, comprising: The method comprises: receiving first indication information, the first indication information being used for indicating Q1 subcarrier groups activated in Q subcarrier groups corresponding to a first symbol; demodulating the first symbol according to the first indication information, The Q subcarrier groups are subcarrier groups into which subcarriers in the first symbol except for a plurality of first subcarriers are divided, each of the subcarrier groups 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 performing discrete Fourier transform (DFT) on data signals, a Pth first subcarrier and a P+1th first subcarrier are separated by X second subcarriers, 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 of claim 11, wherein, A Pth second subcarrier and a P+1th second subcarrier in a first subcarrier group are separated by X1 subcarriers, the first subcarrier group is one of the Q subcarrier groups, and X1 is a positive integer.

13. The method of claim 12, wherein, A Pth second subcarrier and a P+1th second subcarrier in a second subcarrier group are separated by X2 subcarriers, the second subcarrier group is one of the Q subcarrier groups except for the first subcarrier group, and X2 is a positive integer. X2 is equal to or different from X1.

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

15. The method of claim 14, wherein, The second indication information is used to indicate a density of the plurality of first subcarriers and a position of a first first subcarrier in the plurality of first subcarriers in a frequency domain resource.

16. The method of claim 15, wherein, The second indication information indicates the density of the plurality of first subcarriers, including that 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 a position of the Q1 subcarrier groups in the Q subcarrier groups.

18. The method of claim 17, wherein, The position of the Q1 subcarrier groups in the Q subcarrier groups is related to at least one of the following information: an identifier of a terminal device, an identifier of a cell, an index of the first symbol, an index of a time slot, an index of a subframe, an index of a frame, or an identifier of a partial bandwidth (BWP).

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

20. A communications device, characterized by The apparatus includes a processor coupled to a memory, the memory being used to store computer programs or instructions, and the processor being used to execute the computer programs or instructions in the memory, so that the apparatus performs the method in any one of claims 1 to 10 or performs the method in any one of claims 11 to 20.

21. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions, which, when executed on a computer, cause the computer to perform the method in any one of claims 1 to 20.

22. A chip system, characterized by The apparatus includes a processor, which is used to call and run computer programs from a memory, so that a communication device in which the chip system is installed performs the method in any one of claims 1 to 20.

23. A computer program product, characterised in that, The computer program product, when executed on a computer, causes the computer to perform the method in any one of claims 1 to 20.

Images