DC subcarrier indication method, DC subcarrier determination method, communication node and storage medium

Abstract

The invention provides a DC subcarrier indication method, a DC subcarrier determination method, a communication node and a storage medium. The direct current subcarrier indication method comprises the following steps: sending indication information, wherein the indication information is used for indicating position information of a direct current subcarrier; and sending data through the DC subcarrier.

Description

DC subcarrier indication method, determination method, communication node and storage medium Technical Field

[0001] This application relates to the field of wireless communication technology, such as a DC subcarrier indication method, determination method, communication node, and storage medium. Background Technology

[0002] The concept of a virtual carrier has been introduced into wireless communication systems. Its purpose is to virtualize discrete physical carriers into a single carrier, merging the resources of multiple carriers and allowing them to share a single baseband processing unit. However, for the terminal, reception and transmission actually occur on different physical carriers. The introduction of virtual carriers introduces the problem of multiple DC subcarriers. Furthermore, the Inverse Fast Fourier Transform (IFFT) also suffers from the problem of multiple DC subcarriers. If the UE is unaware of the location of different DC subcarriers or the existence of multiple DC subcarriers, it cannot utilize them to receive data and ensure correct data reception. Therefore, how to explicitly notify the UE of the location of multiple DC subcarriers is a problem that urgently needs to be solved. Summary of the Invention

[0003] This application provides a DC subcarrier indication method, a determination method, a communication node, and a storage medium.

[0004] This application provides a DC subcarrier indication method, including:

[0005] Send indication information, the indication information being used to indicate the position information of the DC subcarrier;

[0006] Data is transmitted via the DC subcarrier.

[0007] This application provides a method for determining a DC subcarrier, including:

[0008] Receive indication information, the indication information being used to indicate the position of the DC subcarrier;

[0009] Data is received via the DC subcarrier.

[0010] This application also provides a communication node, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-described DC subcarrier indication method.

[0011] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned DC subcarrier indication method. Attached Figure Description

[0012] Figure 1 is a schematic diagram of a virtual carrier provided in one embodiment;

[0013] Figure 2 is a schematic diagram of a method for virtualizing discrete physical carriers according to an embodiment;

[0014] Figure 3 is a schematic diagram of a two-level IFFT provided in one embodiment;

[0015] Figure 4 is a flowchart of a DC subcarrier indication method provided in an embodiment;

[0016] Figure 5 is a flowchart of a DC subcarrier determination method provided in an embodiment;

[0017] Figure 6 is a schematic diagram of a DC subcarrier indicator device according to an embodiment;

[0018] Figure 7 is a schematic diagram of a DC subcarrier determination device according to an embodiment;

[0019] Figure 8 is a schematic diagram of the hardware structure of a communication node according to an embodiment. Detailed Implementation

[0020] The present application will now be described in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and not intended to limit it. It should be noted that, unless otherwise specified, the embodiments and features described herein can be arbitrarily combined with each other. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present application are shown in the accompanying drawings, not the entire structure.

[0021] Figure 1 is a schematic diagram of a virtual carrier provided in one embodiment. As shown in Figure 1, by introducing a virtual carrier, some discrete physical carriers can be virtualized into a single carrier and processed by a single baseband processing unit, thereby reducing the number of baseband processing units. Furthermore, some joint scheduling optimizations can be performed within the virtual carrier to reduce some overhead and complexity.

[0022] Figure 2 is a schematic diagram of a method for virtualizing discrete physical carriers according to an embodiment. As shown in Figure 2, one implementation scheme for virtual carriers is that all physical carriers share a single radio frequency (RF) unit. That is, after the IFFT, all physical carriers are transmitted through a single RF unit, resulting in multiple direct current (DC) subcarriers. Figure 3 is a schematic diagram of a two-stage IFFT according to an embodiment. As shown in Figure 3, different waveform schemes and application scenarios are adapted through two-stage IFFT (subcarrier-level and subband-level). The subcarrier-level IFFT processes only within the subband range, while the subband-level IFFT processes between subbands. In this case, the second-stage IFFT will extend the DC subcarriers across the entire bandwidth, also resulting in multiple DC subcarriers.

[0023] Subcarriers located at the center frequency of a carrier are called DC subcarriers. Due to local crystal oscillator leakage, they can cause high interference to multiple adjacent subcarriers. In Long Term Evolution (LTE) systems, DC subcarriers do not transmit data. In New Radio (NR) systems, due to receiver enhancements, DC subcarriers can transmit data. Whether the receiver receives data on a particular subcarrier depends on the UE implementation. In NR systems, a single signaling scheme can be used to indicate the location of DC subcarriers, typically indicating the location of one DC subcarrier per subcarrier interval within a single carrier, resulting in a relatively simple indication method. If the UE is unaware of the location of different DC subcarriers or the existence of multiple DC subcarriers, and therefore cannot utilize them to receive data and ensure correct data reception, it is impossible for the UE to receive data correctly.

[0024] Figure 4 is a flowchart of a DC subcarrier indication method according to an embodiment. This method can be applied to a first communication node, which can be a network-side node or a transmitter of indication information or data. As shown in Figure 4, the method provided in this embodiment includes steps 110 and 120.

[0025] In step 110, indication information is sent, which is used to indicate the position information of the DC subcarrier.

[0026] In step 120, data is transmitted via the DC subcarrier.

[0027] In this embodiment, the subcarrier located at the center frequency of the carrier is called a DC subcarrier. Through the indication information, the network side can flexibly and comprehensively indicate the location information of one or more DC subcarriers. For example, it can indicate the DC subcarriers on each RB set or each subband, thereby accurately notifying the user equipment (UE) of the specific DC subcarrier location, facilitating data reception by the UE.

[0028] In one embodiment, the location information of the DC subcarriers includes: the locations of a predetermined number of DC subcarriers. Wherein,

[0029] The set quantity can be one or more. In one embodiment, the set quantity is the maximum number of physical carriers or resource block sets (Sets). A physical carrier or RB set can be understood as a set of physical carriers or RBs used for virtualization or permitted for virtualization. For example, if a maximum of four physical carriers or RB sets are allowed to be virtualized as one carrier sharing one baseband processing unit, then the set quantity can be four.

[0030] For example, the indication information could take the form of a list of DC subcarrier locations (txDirectCurrentLocationList):

[0031] SEQUENCE(SIZE(1..maxDCs))OF txDirectCurrentLocation;

[0032] Here, `maxDCs` represents the maximum number of physical carriers allowed to be virtualized, or the number of RB sets allowed to be virtualized. Alternatively, since the standard does not describe virtualization, `maxDCs` may represent the number of carriers under a large carrier, or the number of RB sets under a large carrier, or the number of subbands under a large carrier. `txDirectCurrentLocation` indicates the location of each DC subcarrier. Currently, in 5G NR, the maximum bandwidth within a carrier is 275 RBs, and each RB contains 12 subcarriers, requiring the indication of 3300 subcarrier indices. Therefore, the RRC message uses 12 bits to indicate values ​​from 0 to 4095, where the range 0-3299 represents the subcarrier index, and the value range 3300-4095 is reserved and can be ignored by the UE. For 6G systems, the bandwidth may be further increased, which may lead to the need for more bits to indicate more subcarrier indices. For example, if the maximum bandwidth within a carrier is 550 RBs and each RB contains 12 subcarriers, 6600 subcarrier indices need to be indicated, so 13 bits are needed to indicate 0-8191 values. The range 0-6599 represents the subcarrier index, and the value range 6600-8191 is reserved and can be ignored by the UE.

[0033] In one embodiment, the position information of the DC subcarrier includes: the position of a reference DC subcarrier; and the offset of the position of the non-reference DC subcarrier relative to the position of the reference DC subcarrier.

[0034] In this embodiment, the position of the reference DC subcarrier can be indicated by the indication information, and the positions of other DC subcarriers can be represented by their offsets relative to the position of the reference DC subcarrier. The offset refers to the number of frequency-domain subcarriers between the positions of the other DC subcarriers and the position of the reference DC subcarrier.

[0035] The reference DC subcarrier position can be any one of all DC subcarriers that need to be indicated or notified. It can be determined based on its frequency domain position, such as the highest or lowest frequency domain position, a DC subcarrier in the middle of the frequency domain, or a subcarrier at a specified frequency domain position. For example, if the reference DC subcarrier position is the 120th subcarrier and is the lowest frequency domain position, and the first offset value of other DC subcarrier 1 is 50 subcarriers, then the actual subcarrier position of other DC subcarrier 1 is the 170th (120+50)th subcarrier or the 169th (120+50-1)th subcarrier; if the second offset value of other DC subcarrier 2 is 101 subcarriers, then the actual subcarrier position of other DC subcarrier 2 is the 221st (120+101)th subcarrier or the 220th (120+101-1)th subcarrier. For example, the indication information could take the form of a DC subcarrier position offset list (txDirectCurrentLocationOffsetList):

[0036] SEQUENCE(SIZE(0..maxDCs-1))OF txDirectCurrentLocationOffset;

[0037] Here, `maxDCs` represents the maximum number of physical carriers allowed to be virtualized, or the number of RB sets allowed to be virtualized. Alternatively, since the standard does not describe virtualization, `maxDCs` may represent the number of carriers under a large carrier, or the number of RB sets under a large carrier, or the number of subbands under a large carrier. `txDirectCurrentLocation` indicates the location of each DC subcarrier. Currently, in 5G NR, the maximum bandwidth within a carrier is 275 RBs, and each RB contains 12 subcarriers, requiring the indication of 3300 subcarrier indices. Therefore, the RRC message uses 12 bits to indicate values ​​from 0 to 4095, where the range 0-3299 represents the subcarrier index, and the value range 3300-4095 is reserved and can be ignored by the UE. For 6G systems, the bandwidth may be further increased, which may lead to the need for more bits to indicate more subcarrier indices. For example, if the maximum bandwidth within a carrier is 550 RBs and each RB contains 12 subcarriers, 6600 subcarrier indices need to be indicated, so 13 bits are needed to indicate 0-8191 values. The range 0-6599 represents the subcarrier index, and the value range 6600-8191 is reserved and can be ignored by the UE.

[0038] In one embodiment, the position information of the DC subcarrier includes: the starting position of the reference DC subcarrier; and the frequency domain period of the DC subcarrier.

[0039] In this embodiment, the multiple DC subcarriers that need to be indicated or notified can be periodic. For example, a two-level IFFT will cause DC subcarriers to appear in the frequency domain in sub-band units. The indication information can indicate the position of the reference DC subcarrier (specifically, the starting position of the reference DC subcarrier), and the period of the DC subcarrier can be configured. The DC subcarrier period can refer to the number of frequency domain subcarriers. The position of the reference DC subcarrier can be any one of the DC subcarriers that need to be indicated or notified, and can be determined based on the frequency domain position. For example, it can be the DC subcarrier with the highest or lowest frequency domain position, the DC subcarrier with the middle frequency domain position, or a subcarrier with a specified frequency domain position, etc. For example, if the starting position of the reference DC subcarrier is the 200th subcarrier and the frequency domain period of the DC subcarrier is 280 subcarriers, then the positions of the other DC subcarriers are the 480th (200+280)th subcarrier, the 760th (200+280+280)th subcarrier, and so on, not exceeding the maximum number of subcarriers corresponding to the maximum system bandwidth; or the positions of the other DC subcarriers are the 479th (200+280-1)th subcarrier, the 759th (200+280+280-1)th subcarrier, and so on, not exceeding the maximum number of subcarriers corresponding to the maximum system bandwidth.

[0040] In one embodiment, the frequency domain period of the DC subcarrier can be the number of RBs. The number of RBs needs to be converted into the number of subcarriers before the positions of other DC subcarriers can be obtained. For example, if the frequency domain period of the DC subcarrier is 50 RBs, then the number of subcarriers is 50 * 12, which equals 600 frequency domain subcarriers.

[0041] In one embodiment, the reference DC subcarrier includes at least one of the following: the DC subcarrier with the lowest frequency domain position and the DC subcarrier with the highest frequency domain position.

[0042] In one embodiment, the location information of the DC subcarrier includes the location of the DC subcarrier within each resource block set. In this embodiment, the location of the DC subcarrier can be indicated on a per-RB set basis, rather than the entire carrier, using indication information. The location of the DC subcarrier (subcarrier index) is the same within each RB set. RB sets can be subbands. This reduces signaling overhead.

[0043] In one embodiment, at least two DC subcarriers exist within a single subcarrier interval under a single carrier.

[0044] In one embodiment, the sending indication information includes:

[0045] Indication information is sent via semi-static signaling. The semi-static signaling can be either uplink or downlink.

[0046] Figure 5 is a flowchart of a DC subcarrier determination method according to one embodiment. This method can be applied to a second communication node, which can be a UE or a receiver of indication information or data. It should be noted that technical details not described in detail in this embodiment can be found in any of the above embodiments.

[0047] As shown in Figure 5, the method provided in this embodiment includes steps 210 and 220.

[0048] In step 210, indication information is received, which is used to indicate the position of the DC subcarrier.

[0049] In step 220, data is received via the DC subcarrier.

[0050] In one embodiment, the location information of the DC subcarrier includes:

[0051] The positions of a set number of DC subcarriers.

[0052] In one embodiment, the set quantity is the maximum number of physical carriers or resource block sets.

[0053] In one embodiment, the location information of the DC subcarrier includes:

[0054] The position of the reference DC subcarrier; the offset of the position of the non-reference DC subcarrier relative to the position of the reference DC subcarrier.

[0055] In one embodiment, the location information of the DC subcarrier includes:

[0056] Reference DC subcarrier start position; DC subcarrier period.

[0057] In one embodiment, the reference DC subcarrier includes at least one of the following: the DC subcarrier with the lowest frequency domain position and the DC subcarrier with the highest frequency domain position.

[0058] In one embodiment, the location information of the DC subcarrier includes the location of the DC subcarrier within each resource block set.

[0059] In one embodiment, at least two DC subcarriers exist within a single subcarrier interval under a single carrier.

[0060] In one embodiment, receiving the indication information includes:

[0061] Instruction information is received via semi-static signaling.

[0062] In one embodiment, the second communication node decides whether to receive data on the DC subcarrier based on the terminal's capabilities, depending on the specific implementation of the terminal.

[0063] This application also provides a DC subcarrier indicator device. Figure 6 is a schematic diagram of the structure of a DC subcarrier indicator device provided in one embodiment. As shown in Figure 6, the DC subcarrier indicator device includes:

[0064] Indication module 310 is configured to send indication information, the indication information being used to indicate the position information of the DC subcarrier;

[0065] The transmitting module 320 is configured to transmit data via the DC subcarrier.

[0066] In one embodiment, the location information of the DC subcarrier includes:

[0067] The positions of a set number of DC subcarriers.

[0068] In one embodiment, the set quantity is the maximum number of physical carriers or resource block sets.

[0069] In one embodiment, the location information of the DC subcarrier includes:

[0070] The position of the reference DC subcarrier; the offset of the position of the non-reference DC subcarrier relative to the position of the reference DC subcarrier.

[0071] In one embodiment, the location information of the DC subcarrier includes:

[0072] The starting position of the reference DC subcarrier; the frequency domain period of the DC subcarrier.

[0073] In one embodiment, the reference DC subcarrier includes at least one of the following: the DC subcarrier with the lowest frequency domain position and the DC subcarrier with the highest frequency domain position.

[0074] In one embodiment, the location information of the DC subcarrier includes:

[0075] The location of DC subcarriers within each resource block set.

[0076] In one embodiment, at least two DC subcarriers exist within a single subcarrier interval under a single carrier.

[0077] In one embodiment, the indication module 310 is specifically configured to send indication information via semi-static signaling.

[0078] The DC subcarrier indication device proposed in this embodiment belongs to the same inventive concept as the DC subcarrier indication method proposed in the above embodiments. Technical details not described in detail in this embodiment can be found in any of the above embodiments. Furthermore, this embodiment has the same beneficial effects as the DC subcarrier indication method.

[0079] This application also provides a DC subcarrier determination device. Figure 7 is a schematic diagram of a DC subcarrier indication device provided in one embodiment. As shown in Figure 7, the DC subcarrier determination device includes:

[0080] The determining module 410 is configured to receive indication information, which is used to indicate the position of the DC subcarrier;

[0081] The receiving module 420 is configured to receive data via the DC subcarrier.

[0082] In one embodiment, the location information of the DC subcarrier includes:

[0083] The positions of a set number of DC subcarriers.

[0084] In one embodiment, the set quantity is the maximum number of physical carriers or resource block sets.

[0085] In one embodiment, the location information of the DC subcarrier includes:

[0086] The position of the reference DC subcarrier; the offset of the position of the non-reference DC subcarrier relative to the position of the reference DC subcarrier.

[0087] In one embodiment, the location information of the DC subcarrier includes:

[0088] Reference DC subcarrier start position; DC subcarrier period.

[0089] In one embodiment, the reference DC subcarrier includes at least one of the following: the DC subcarrier with the lowest frequency domain position and the DC subcarrier with the highest frequency domain position.

[0090] In one embodiment, the location information of the DC subcarrier includes:

[0091] The location of DC subcarriers within each resource block set.

[0092] In one embodiment, at least two DC subcarriers exist within a single subcarrier interval under a single carrier.

[0093] In one embodiment, the receiving module 420 is specifically configured to receive indication information via semi-static signaling.

[0094] This application also provides a communication node. Figure 8 is a schematic diagram of the hardware structure of a communication node provided in an embodiment. As shown in Figure 8, the communication node provided in this application includes a processor 510 and a memory 520. The processor 510 in the communication node can be one or more, and Figure 8 takes one processor 510 as an example. The memory 520 is configured to store one or more programs. The one or more programs are executed by the one or more processors 510, so that the one or more processors 510 implement the DC subcarrier indication method as described in the embodiment of this application.

[0095] The communication node also includes: a communication device 530, an input device 540, and an output device 550.

[0096] The processor 510, memory 520, communication device 530, input device 540 and output device 550 in the communication node can be connected by a bus or other means. Figure 8 shows an example of connection by bus.

[0097] Input device 540 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the communication node. Output device 550 may include display devices such as a display screen.

[0098] The communication device 530 may include a receiver and a transmitter. The communication device 530 is configured to perform information transmission and reception communication under the control of the processor 510.

[0099] The memory 520, as a computer-readable storage medium, can be configured to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the DC subcarrier indication method described in the embodiments of this application. The memory 520 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required for at least one function; the data storage area may store data created based on the use of the communication node, etc. Furthermore, the memory 520 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 520 may further include memory remotely located relative to the processor 510, and these remote memories can be connected to the communication node via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0100] This application also provides a storage medium storing a computer program, which, when executed by a processor, implements any of the DC subcarrier indication methods or DC subcarrier determination methods described in this application.

[0101] This application also provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements any of the DC subcarrier indication methods or DC subcarrier determination methods described in this application.

[0102] The computer storage medium in this application embodiment can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable CD-ROM, optical storage device, magnetic storage device, or any suitable combination thereof. The computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0103] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in connection with an instruction execution system, apparatus, or device.

[0104] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, radio frequency (RF), etc., or any suitable combination thereof.

[0105] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0106] This application also provides a computer program product, including a computer program / instructions, which, when executed by a processor, implement the DC subcarrier indication method as described in any of the above embodiments.

[0107] The above description is merely an exemplary embodiment of this application and is not intended to limit the scope of protection of this application.

[0108] Those skilled in the art will understand that the term user terminal encompasses any suitable type of wireless user equipment, such as mobile phones, portable data processing portable web browsers, or vehicle-mounted mobile stations.

[0109] Generally, the various embodiments of this application can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while others can be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device, although this application is not limited thereto.

[0110] Embodiments of this application can be implemented by executing computer program instructions through the data processor of a mobile device, for example, in a processor entity, or through hardware, or through a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages.

[0111] Any block diagram of logical flow in the accompanying drawings of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored in memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (Digital Video Disc (DVD) or Compact Disk (CD), etc.). Computer-readable media may include non-transitory storage media. The data processor may be of any type suitable to the local technical environment, such as, but not limited to, general-purpose computers, special-purpose computers, microprocessors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), and processors based on multi-core processor architectures.

[0112] A detailed description of exemplary embodiments of this application has been provided above through exemplary and non-limiting examples. However, various modifications and adjustments to the above embodiments will be apparent to those skilled in the art when considered in conjunction with the accompanying drawings and claims, without departing from the scope of this application. Therefore, the proper scope of this application will be determined by the claims.

Claims

1. A DC subcarrier indication method, executed by a first communication node, characterized in that, The method includes: sending indication information, the indication information being used to indicate the location information of a DC subcarrier; and sending data via the DC subcarrier.

2. The method according to claim 1, characterized in that, The location information of the DC subcarriers includes: the location of a set number of DC subcarriers.

3. The method according to claim 2, characterized in that, The set quantity is the maximum number of physical carriers or resource block sets.

4. The method according to claim 1, characterized in that, The position information of the DC subcarrier includes: the position of the reference DC subcarrier; and the offset of the position of the non-reference DC subcarrier relative to the position of the reference DC subcarrier.

5. The method according to claim 1, characterized in that, The position information of the DC subcarrier includes: the starting position of the reference DC subcarrier; and the frequency domain period of the DC subcarrier.

6. The method according to claim 4 or 5, characterized in that, The reference DC subcarrier includes at least one of the following: the DC subcarrier with the lowest frequency domain position and the DC subcarrier with the highest frequency domain position.

7. The method according to claim 1, characterized in that, The location information of the DC subcarrier includes the location of the DC subcarrier within each resource block set.

8. The method according to claim 1, characterized in that, There are at least two DC subcarriers within a single subcarrier interval under a single carrier.

9. The method according to claim 1, characterized in that, The sending instruction information includes: sending instruction information via semi-static signaling.

10. A method for determining a DC subcarrier, executed by a second communication node, characterized in that, The method includes: receiving indication information, the indication information being used to indicate the position of a DC subcarrier; and receiving data through the DC subcarrier.

11. The method according to claim 10, characterized in that, The location information of the DC subcarriers includes: the location of a set number of DC subcarriers.

12. The method according to claim 11, characterized in that, The set quantity is the maximum number of physical carriers or resource block sets.

13. The method according to claim 10, characterized in that, The position information of the DC subcarrier includes: the position of the reference DC subcarrier; and the offset of the position of the non-reference DC subcarrier relative to the position of the reference DC subcarrier.

14. The method according to claim 10, characterized in that, The position information of the DC subcarrier includes: the starting position of the reference DC subcarrier; and the period of the DC subcarrier.

15. The method according to claim 13 or 14, characterized in that, The reference DC subcarrier includes at least one of the following: the DC subcarrier with the lowest frequency domain position and the DC subcarrier with the highest frequency domain position.

16. The method according to claim 10, characterized in that, The location information of the DC subcarrier includes the location of the DC subcarrier within each resource block set.

17. The method according to claim 10, characterized in that, There are at least two DC subcarriers within a single subcarrier interval under a single carrier.

18. The method according to claim 10, characterized in that, The receiving indication information includes: receiving indication information via semi-static signaling.

19. A communication node, characterized in that, include: Memory, and one or more processors; The memory is configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the DC subcarrier indication method as described in any one of claims 1-18.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements the DC subcarrier indication method as described in any one of claims 1-18.

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