Communication method, device and system

Abstract

The invention relates to the technical field of communication, and discloses a communication method, device and system. Wherein the method comprises: a first communication device generating one or more OFDM symbols in a radio frame; transmitting the one or more OFDM symbols on a first channel in a first frequency band; wherein the subcarrier interval of the first channel is 2N times of the subcarrier interval of the second channel in the second frequency band, the subcarrier interval of the second channel is 480 kHz KHz, and the lowest frequency of the first frequency band is higher than the highest frequency of the second frequency band; the bandwidth of the second channel is 2P * 20 megahertz MHz, and the bandwidth of the first channel is 2N * 2P * 20 MHZ. By adopting the method, the parameter of the high-frequency band is designed based on the parameter of the low-frequency band, so that the subcarrier interval of the high-frequency band is greater than the subcarrier interval of the low-frequency band, the influence of more prominent phase noise and the like of the high-frequency band can be overcome, and the transmission performance is improved.

Description

[0001] This application claims priority to the Chinese patent application filed with the Intellectual Property Office of the People's Republic of China on March 12, 2024, with application number 202410288060.1 and invention name "A Communication Method, Device and System", the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method, device, and system. Background Art

[0003] The development of wireless local area networks (WLANs) has made wireless communications increasingly popular, and the standards for WLANs established by the Institute of Electrical and Electronics Engineers (IEEE), namely the 802.11 protocol suite, have also continued to evolve.

[0004] With the continuous development of Internet of Things technology, short-range communication technologies such as WLAN technology may not be able to meet more application scenarios and needs well. Therefore, SparkLink (or NearLink) communication technology for short-range communication has come into being. At present, SparkLink communication technology supports low-frequency bands. Since high-frequency bands (such as millimeter wave bands) can provide transmission rates of up to gigabits per second (Gbps), high-frequency bands have become very promising bands for future short-range wireless communications. However, the parameters of SparkLink communication technology in low-frequency bands cannot be directly applied to high-frequency bands. For example, high-frequency bands have more prominent phase noise and other effects. If the parameters in low-frequency bands are directly applied to high-frequency bands, the transmission performance will be poor. Therefore, the relevant implementation of SparkLink communication technology in high-frequency bands still needs further research. Summary of the Invention

[0005] The present application provides a communication method, device and system for designing the parameters of a high-frequency band based on the parameters of a low-frequency band, so that the subcarrier spacing of the high-frequency band is larger than the subcarrier spacing of the low-frequency band, thereby facilitating overcoming the effects of phase noise, which is more prominent in the high-frequency band, and improving transmission performance.

[0006] In a first aspect, the present application provides a communication method that can be applied to a first communication device. For example, the first communication device generates one or more OFDM symbols in a wireless frame; transmits the one or more OFDM symbols on a first channel in a first frequency band; wherein the subcarrier spacing of the first channel is 2 times the subcarrier spacing of a second channel in a second frequency band; Ntimes, the subcarrier spacing of the second channel is 480 kHz KHz, the lowest frequency of the first frequency band is higher than the highest frequency of the second frequency band; the bandwidth of the second channel is 2 P *20 MHz, the bandwidth of the first channel is 2 N *2 P *20MHZ, N is an integer greater than 0, and P is an integer greater than or equal to 0.

[0007] In a second aspect, the present application provides a communication method that can be applied to a second communication device. For example, the second communication device receives one or more OFDM symbols in a wireless frame on a first channel in a first frequency band; processes the one or more OFDM symbols; wherein the subcarrier spacing of the first channel is 2 and the subcarrier spacing of the second channel in the second frequency band is 2. N times, the subcarrier spacing of the second channel is 480 kHz KHz, the lowest frequency of the first channel is higher than the highest frequency of the second channel; the bandwidth of the second channel is 2 P *20 MHz, the bandwidth of the first channel is 2 N *2 P *20MHZ; N is an integer greater than 0, and P is an integer greater than or equal to 0.

[0008] Using the method of the first aspect or the second aspect, the subcarrier spacing of the first channel is 2 times the subcarrier spacing of the second channel in the second frequency band. N times; thus, the subcarrier spacing of the low frequency band is increased by 2 N times to obtain the subcarrier spacing of the high frequency band, so that the subcarrier spacing of the high frequency band is larger than that of the low frequency band, thereby overcoming the more prominent phase noise in the high frequency band and improving the transmission performance. The bandwidth of the second channel is 2 P *20MHz, the bandwidth of the first channel is 2 N *2 P *20 MHz, that is, the number of DFT points corresponding to the bandwidth of the second channel is the same as that of the first channel. This allows the low-frequency band and the high-frequency band to share signal processing components, such as DFT / IDFT components, thereby reducing the cost and complexity of the baseband chips that process low-frequency and high-frequency signals.

[0009] For the first or second aspect above:

[0010] In one possible design, the number of discrete Fourier transform (DFT) points corresponding to the bandwidth of the first channel is 2 P *64.

[0011] In this way, the number of DFT points corresponding to the bandwidth of the first channel is a multiple of 2, which is more convenient to implement.

[0012] In one possible design, the subcarrier spacing of the first channel is 3.84 MHz, and the bandwidth of the first channel and the number of DFT points corresponding to the first channel satisfy any one of the following:

[0013] The bandwidth of the first channel is 160 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 64;

[0014] The bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 128;

[0015] The bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256;

[0016] The bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512;

[0017] The bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024.

[0018] In one possible design, the subcarrier spacing of the first channel is 1.92 MHz, and the bandwidth of the first channel and the number of DFT points corresponding to the bandwidth of the first channel satisfy any one of the following:

[0019] The bandwidth of the first channel is 80 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 64;

[0020] The bandwidth of the first channel is 160 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 128;

[0021] The bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256;

[0022] The bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512;

[0023] The bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024;

[0024] The bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 2048.

[0025] In one possible design, the number of discrete Fourier transform (DFT) points corresponding to the bandwidth of the first channel is 2 P *256.

[0026] In one possible design, the subcarrier spacing of the first channel is 1.92 MHz, and the bandwidth of the first channel and the number of DFT points corresponding to the first channel satisfy any one of the following:

[0027] The bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256;

[0028] The bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512;

[0029] The bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024;

[0030] The bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 2048.

[0031] In one possible design, the first channel includes a left guard interval, a right guard interval, and Q subcarriers located between the left guard interval and the right guard interval, where Q is an integer greater than 1; wherein the bandwidth between the left guard interval and the right guard interval is Q times the subcarrier interval of the first channel.

[0032] In this way, when the first channel includes multiple subchannels, since the bandwidth between the left guard interval and the right guard interval is an integer multiple of the subcarrier spacing of the first channel, interference between subchannels or interference between carriers can be effectively reduced.

[0033] In one possible design, the number of discrete Fourier transform (DFT) points corresponding to the bandwidth of the first channel is 2 P *64, the subcarrier spacing of the first channel is 3.84 MHz; the left guard interval is 3.84 MHz; when Pmod2=1, the right guard interval is 5.12 MHz, or when Pmod2=0, the right guard interval is 6.4 MHz; or, the left guard interval is 5.12 MHz; when Pmod2=1, the right guard interval is 3.84 MHz, or when Pmod2=0, the right guard interval is 5.12 MHz; or, the left guard interval is 6.4 MHz; when Pmod2=1, the right guard interval is 6.4 MHz, or when Pmod2=0, the right guard interval is 3.84 MHz.

[0034] In one possible design, the number of discrete Fourier transform (DFT) points corresponding to the bandwidth of the first channel is 2 P*64, the subcarrier spacing of the first channel is 1.92 MHz; the left guard interval is 1.92 MHz; when Pmod2=1, the right guard interval is 2.56 MHz, or when Pmod2=0, the right guard interval is 3.2 MHz; or, the left guard interval is 2.56 MHz; when Pmod2=1, the right guard interval is 1.92 MHz, or when Pmod2=0, the right guard interval is 2.56 MHz; or, the left guard interval is 3.2 MHz; when Pmod2=1, the right guard interval is 3.2 MHz, or when Pmod2=0, the right guard interval is 1.92 MHz.

[0035] In one possible design, the Q subcarriers are sorted from low to high based on frequency, the Q subcarriers include Q1 subcarriers and Q2 subcarriers, the Q1 subcarrier is a DC subcarrier, the Q2 subcarrier is an occupied subcarrier, the occupied subcarriers include data subcarriers and / or pilot subcarriers, Q1 is an odd number greater than or equal to 1, Q2 is an integer greater than or equal to 1, Q1 is less than Q, and Q2 is less than Q.

[0036] In one possible design, when Qmod2=1, the Q2 subcarriers include consecutive (Q-2-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and consecutive (Q-2-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein the rightmost subcarrier of the consecutive (Q-2-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier of the consecutive (Q-2-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier;

[0037] When Qmod2=0, the Q2 subcarriers include consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier of the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier of the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier;

[0038] Among the Q subcarriers, Q3 subcarriers other than the Q1 subcarriers and the Q2 subcarriers are empty subcarriers; when Qmod2=1, Q3=2, and when Qmod2=1, Q3=1; mod represents a modulo operation.

[0039] In this way, since the DC subcarrier is the subcarrier located in the middle of the Q subcarriers, it is easy to avoid the DC impact caused by using the subcarrier in the middle as a data or pilot subcarrier, thereby improving reception performance. Furthermore, the above design can ensure that in various situations of the left guard interval and the right guard interval, the number of DC subcarriers is the same and an odd number, the number of occupied subcarriers is the same, and the number of occupied subcarriers on both sides of the DC subcarrier is the same, thereby reducing processing complexity.

[0040] In one possible design, when Qmod2=1, Q3=2, and the Q3 subcarriers include the 1st subcarrier and the 2nd subcarrier among the Q subcarriers, or the 1st subcarrier and the Qth subcarrier among the Q subcarriers, or the Q-1th subcarrier and the Qth subcarrier among the Q subcarriers; when Qmod2=0, Q3=1, and the Q3 subcarriers include the 1st subcarrier or the Qth subcarrier among the Q subcarriers.

[0041] In one possible design, when Qmod2=1, the Q2 subcarriers include consecutive (Q-Q1) / 2 subcarriers to the left of the Q1 subcarrier and consecutive (Q-Q1) / 2 subcarriers to the right of the Q1 subcarrier; wherein, the rightmost subcarrier of the consecutive (Q-Q1) / 2 subcarriers to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier of the consecutive (Q-Q1) / 2 subcarriers to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; when Qmod2=0, the Q2 subcarriers include the consecutive (Q-Q1) / 2 subcarriers to the left of the Q1 subcarrier and the rightmost subcarrier of the Q1 subcarrier. The consecutive (Q-1-Q1) / 2 subcarriers to the left of the subcarrier and the consecutive (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarrier; wherein, the rightmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; one subcarrier among the Q subcarriers other than the Q1 subcarrier and the Q2 subcarrier is a null subcarrier; wherein mod represents a remainder operation.

[0042] In this way, the left guard interval and the right guard interval can be predefined or preconfigured. At this time, there is no need to consider whether the number of occupied subcarriers in various situations of the left guard interval and the right guard interval is the same. Therefore, it is possible to not set an empty subcarrier or set one empty subcarrier, thereby reducing processing complexity while improving resource utilization.

[0043] In one possible design, the number of discrete Fourier transform (DFT) points corresponding to the bandwidth of the first channel is 2 P *256, the subcarrier spacing of the first channel is 1.92 MHz;

[0044] The left guard interval is 7.68 MHz; when Pmod2=1, the right guard interval is 10.24 MHz, or when Pmod2=0, the right guard interval is 12.8 MHz; or,

[0045] The left guard interval is 10.24 MHz; when Pmod2=1, the right guard interval is 7.68 MHz, or when Pmod2=0, the right guard interval is 10.24 MHz; or,

[0046] The left guard interval is 12.8 MHz; when Pmod2=1, the right guard interval is 12.8 MHz, or when Pmod2=0, the right guard interval is 7.68 MHz.

[0047] In one possible design, the Q subcarriers are sorted from low to high based on frequency, the Q subcarriers include Q1 subcarriers and Q2 subcarriers, the Q1 subcarrier is a DC subcarrier, the Q2 subcarrier is an occupied subcarrier, the occupied subcarriers include data subcarriers and / or pilot subcarriers, Q1 is an odd number greater than or equal to 1, Q2 is an integer greater than or equal to 1, Q1 is less than Q, and Q2 is less than Q.

[0048] In one possible design, Q=Q'*4, where Q' is an integer greater than or equal to 1;

[0049] When Q'mod2=1, Q2=Q-5-Q1, and the Q2 subcarriers include the consecutive (Q-5-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and the consecutive (Q-5-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier among the consecutive (Q-5-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-5-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier;

[0050] When Q'mod2=0, Q2=Q-1-Q1, and the Q2 subcarriers include the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier;

[0051] Among the Q subcarriers, Q3 subcarriers other than the Q1 subcarriers and the Q2 subcarriers are empty subcarriers; when Q'mod2=1, Q3=5, and when Q'mod2=0, Q3=1; mod represents a modulo operation.

[0052] In this way, since the DC subcarrier is the subcarrier located in the middle of the Q subcarriers, it is easy to avoid the DC impact caused by using the subcarrier in the middle as a data or pilot subcarrier, thereby improving reception performance. Furthermore, the above design can ensure that in various situations of the left guard interval and the right guard interval, the number of DC subcarriers is the same and an odd number, the number of occupied subcarriers is the same, and the number of occupied subcarriers on both sides of the DC subcarrier is the same, thereby reducing processing complexity.

[0053] In one possible design, when Q'mod2=1, Q3=5, and the Q3 subcarriers include:

[0054] The first subcarrier to the fifth subcarrier among the Q subcarriers; or,

[0055] the 1st to 4th subcarriers, and the Qth subcarrier among the Q subcarriers; or,

[0056] The 1st to 3rd subcarriers, and the Q-1th subcarrier and the Qth subcarrier among the Q subcarriers; or,

[0057] The 1st subcarrier to the 2nd subcarrier, and the Q-2th subcarrier to the Qth subcarrier among the Q subcarriers; or,

[0058] the 1st subcarrier, and the Q-3th subcarrier to the Qth subcarrier among the Q subcarriers; or,

[0059] The Q-4th subcarrier to the Qth subcarrier among the Q subcarriers;

[0060] When Q'mod2=0, Q3=1, and the Q3 subcarriers include the 1st subcarrier or the Qth subcarrier among the Q subcarriers.

[0061] In one possible design, Q=Q'*4, where Q' is an integer greater than or equal to 1; the Q2 subcarriers include consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein the rightmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; Q3 subcarriers among the Q subcarriers other than the Q1 subcarrier and the Q2 subcarriers are empty subcarriers, and Q3=1.

[0062] In this way, the left guard interval and the right guard interval can be predefined or preconfigured. At this time, there is no need to consider whether the number of occupied subcarriers in various situations of the left guard interval and the right guard interval is the same. Therefore, it is possible to not set an empty subcarrier or set one empty subcarrier, thereby reducing processing complexity while improving resource utilization.

[0063] In one possible design, the Q subcarriers are sorted from low to high based on frequency, and the Q subcarriers include Q1 subcarriers, the Q1 subcarrier is a DC subcarrier, Q1 is an integer greater than or equal to 1, and Q1 is less than Q; when Qmod2=1, the Q1 subcarrier includes at least one of the (Q-1) / 2th subcarrier, the (Q+1) / 2th subcarrier and the {(Q+1) / 2}+1th subcarrier among the Q subcarriers; or, when Qmod2=0, the Q1 subcarrier includes at least one of the Q / 2th subcarrier and the Q / 2+1th subcarrier among the Q subcarriers.

[0064] In this way, since the DC subcarrier is the subcarrier located in the middle position among the Q subcarriers, it is easy to avoid the DC influence caused by using the subcarrier in the middle position as a data or pilot subcarrier, thereby improving the receiving performance.

[0065] In one possible design, some or all of the (Q-Q1) subcarriers among the Q subcarriers except the Q1 subcarriers are occupied subcarriers, and the occupied subcarriers include data subcarriers and pilot subcarriers.

[0066] In this way, the method of combining multiple sub-channels into a large channel provided in the embodiment of the present application can convert all or part of the DC sub-carriers originally belonging to the sub-channel into data or pilot sub-carriers, and can also use the protection interval of the original small sub-channel as a data sub-carrier or pilot sub-carrier, thereby helping to improve communication efficiency and frequency band utilization.

[0067] In one possible design, when P=1, the number of occupied subcarriers in the first channel is greater than 76; or, when P=2, the number of occupied subcarriers in the first channel is greater than 152; or, when P=3, the number of occupied subcarriers in the first channel is greater than 304; or, when P=4, the number of occupied subcarriers in the first channel is greater than or equal to 608; or, when P=5, the number of occupied subcarriers in the first channel is greater than or equal to 1216.

[0068] That is to say, through the design of this application, the number of occupied subcarriers in the first channel is greater than the product of the number of subchannels included in the first channel and the number of occupied subcarriers in a single subchannel (i.e., 38), which helps to improve communication efficiency and frequency band utilization.

[0069] In a third aspect, the present application provides a communication device, which has the ability to implement the functions involved in the first or second aspect above. For example, the communication device includes modules or units or means corresponding to the operations involved in the first or second aspect above. The functions or units or means can be implemented through software, or through hardware, or the corresponding software can be implemented through hardware.

[0070] In one possible design, the communication device includes a processing unit and a communication unit. The communication unit can be used to send and receive signals to enable communication between the communication device and other devices; the processing unit can be used to perform certain internal operations of the communication device. The functions performed by the processing unit and the communication unit can correspond to the operations described in the first or second aspect above.

[0071] In one possible design, the communication device includes a processor, which can be coupled to a memory. The memory can store the necessary computer programs or instructions for implementing the functions of the first or second aspect. The processor can execute the computer programs or instructions stored in the memory. When the computer programs or instructions are executed, the communication device implements the method of any possible design or implementation of the first or second aspect.

[0072] In one possible design, the communication device includes a processor and a memory, and the memory may store the necessary computer programs or instructions for implementing the functions involved in the first or second aspect. The processor may execute the computer program or instructions stored in the memory. When the computer program or instructions are executed, the communication device implements the method of any possible design or implementation of the first or second aspect.

[0073] In one possible design, the communication device includes a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and execute the method in any possible design or implementation of the first aspect or the second aspect above.

[0074] It can be understood that in the third aspect above, the processor can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory. In addition, the above processors can be one or more, and the memories can be one or more. The memory can be integrated with the processor, or the memory and the processor can be set separately. In the specific implementation process, the memory can be integrated with the processor on the same chip, or can be set on different chips respectively. The embodiment of the present application does not limit the type of memory and the setting method of the memory and the processor.

[0075] In a fourth aspect, the present application provides a communication system, which may include a first communication device and a second communication device; wherein the first communication device is used to execute the method described in the first aspect above, and the second communication device is used to execute the method described in the second aspect above.

[0076] In a fifth aspect, the present application provides a computer-readable storage medium, in which a computer program (or computer-readable instructions) is stored. When a computer reads and executes part or all of the computer-readable instructions, the method in any possible design of the first or second aspect above is executed.

[0077] Exemplarily, a computer-readable storage medium can be any available medium that can be accessed by a computer. By way of example and not limitation, a computer-readable medium can include a non-transitory computer-readable medium, a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a CD-ROM or other optical disk storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0078] In a sixth aspect, the present application provides a computer program product, which, when read and executed by a computer, enables the method in any possible design of the first aspect or the second aspect to be executed.

[0079] In the seventh aspect, the present application provides a chip (or chip system), which includes a processor, the processor is coupled to a memory, and the memory stores a computer program; the processor is used to call part or all of the computer program in the memory, so that the method in any possible design of the first aspect or the second aspect above is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 This is a schematic diagram of the communication protocol architecture of the Star Flash communication technology involved in the embodiments of the present application;

[0081] Figure 2 Schematic diagram of subcarrier planning for a 20 MHz bandwidth provided in an embodiment of the present application;

[0082] Figure 3 A schematic diagram of the structure of a superframe provided in an embodiment of the present application;

[0083] Figure 4 A schematic diagram of a network architecture applicable to embodiments of the present application;

[0084] Figure 5 A flow chart corresponding to the communication method provided in an embodiment of the present application;

[0085] Figure 6 Schematic diagram of the spacing between subcarriers corresponding to subchannel a and subchannel b provided in an embodiment of the present application;

[0086] Figure 7 A schematic diagram of the first channel provided in an embodiment of the present application;

[0087] Figure 8Schematic diagram of the left guard interval and the right guard interval provided in an embodiment of the present application;

[0088] Figure 9 A schematic diagram of subcarrier planning for the first channel provided in an embodiment of the present application;

[0089] Figure 10 A possible exemplary block diagram of the apparatus involved in the embodiments of the present application;

[0090] Figure 11 A schematic structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0091] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. This application will present various aspects, embodiments, or features around a system that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these solutions may also be used. Furthermore, in the embodiments of the present application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as an "example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of the word "example" is intended to present concepts in a concrete manner. In the embodiments of the present application, the terms "of," "corresponding," and "corresponding" may sometimes be used interchangeably. It should be noted that when the distinction is not emphasized, the meanings they intend to convey are consistent.

[0092] Currently, the SparkLink Alliance provides a communication protocol architecture for SparkLink communication technology. The access technologies that this protocol architecture can provide include SparkLink Basic (SLB) access technology and SparkLink Low Energy (SLE) access technology. Figure 1 This is a schematic diagram of the communication protocol architecture of the Star Flash communication technology involved in the embodiment of this application. Figure 1 As shown, the protocol architecture includes the basic application layer, the basic service layer and the Star Flash access layer (also called the access layer). The basic application layer and the basic service layer can be collectively referred to as the Star Flash upper layer.

[0093] (1) Basic application layer

[0094] The basic application layer includes various general frameworks. In order to achieve communication between different devices on different platforms, the basic application layer has established frameworks for various possible and universal application scenarios.

[0095] (2) Basic service layer

[0096] The basic service layer includes the control plane and the data plane. The control plane primarily provides services such as device discovery and management. The data plane includes channel control data, broadcast data, service management data, real-time data, and reliable data. It also includes the Transmission Control Adaptation Protocol, the Transmission Control Protocol / Internet Protocol (TCP / IP), and the transparent transmission protocol.

[0097] (3) Star Flash Access Layer

[0098] The Star Flash access layer includes the SLB module and the SLE module. The SLB module can also be referred to as the SLB access layer, and the SLE module can also be referred to as the SLE access layer. The SLB module communicates using SLB access technology. SLB access technology offers high-bandwidth communication capabilities and can carry high-bandwidth services such as wireless screen projection and video calling. It provides high data throughput and fast data transmission speeds during communication. However, SLB access technology consumes relatively high power, and the access process is time-consuming.

[0099] In SLB access technology, communication devices include grant nodes (G-nodes) and terminal nodes (T-nodes). G-nodes represent nodes at the access layer that send data scheduling information, while T-nodes represent nodes at the access layer that receive data scheduling information and send data based on it. G-nodes are also allowed to send broadcasts, while T-nodes are allowed to scan for information. During the process of establishing an SLB connection between a G-node and a T-node, the T-node is allowed to scan for and discover G-nodes and send connection requests to them.

[0100] For example, when a large-screen device (such as a TV) is a G-node device and a mobile phone is a T-node device, the large-screen device will automatically broadcast the SLB basic connection information after turning on the SLB communication function. When the mobile phone has a business need for screen projection, it starts to scan the surrounding G-node devices, receives the SLB basic connection information broadcast by them, and displays the device scan results (such as device model, device name, etc.) based on the SLB basic connection information. In response to the user's operation of selecting a large-screen device from the scan results, the mobile phone sends a connection request to the large-screen device, thereby establishing an SLB connection with the large-screen device.

[0101] The SLE module communicates using SLE access technology. SLE offers low-power communication capabilities. When the SLE module is idle (not connected to other devices), it broadcasts device information and data on three fixed advertising channels, enabling rapid discovery and connection, helping to conserve device power. SLE access technology supports a relatively small bandwidth and slow data transmission speeds. Therefore, it is typically used for services with low bandwidth requirements, such as audio playback from wireless headphones and mobile phone control of smart home devices.

[0102] It is understandable that the communication protocol architecture shown above is only a possible example, and the communication protocol architecture may also include other possible protocol layers, which is not limited in the embodiments of the present application.

[0103] based on Figure 1 The communication protocol architecture shown in the figure is used to explain the relevant terms involved in the Star Flash communication technology. Unless otherwise specified, these explanations are intended to support the meaning of the relevant terms and make the embodiments of this application easier to understand, and should not be regarded as strict limitations on the terms in the scope of protection claimed by this application.

[0104] (1) Single carrier and multi-carrier

[0105] When star flash communications are performed between different communication devices, single or multi-carrier communications can be used. The difference between single and multi-carrier communications lies in the different ways of generating the transmission signal. For example, the single carrier can be discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM), and the multi-carrier can be orthogonal frequency division multiplexing (OFDM).

[0106] For example, consider OFDM when performing starlight communication between two devices. One device is the transmitter, and the other is the receiver. The transmitter can be an OFDM transmitter, and the receiver an OFDM receiver. The signal processing process of the OFDM transmitter can be found in the prior art. The signal processing process of the OFDM receiver is the inverse of the OFDM transmitter's.

[0107] (2) Channel bandwidth of Star Flash communication technology

[0108] The operating frequency band of Star Flash communication technology (such as SLB access technology) can be a low-frequency band, such as 5150MHz-5350MHz or 5725MHz-5850MHz, with a minimum channel (or carrier) bandwidth of 20MHz. It supports channel bandwidths of 40 / 60 / 80 / 100 / 160 / 320MHz, which are respectively composed of multiple consecutive 20MHz bandwidths in an aggregated manner.

[0109] Figure 2 This is a schematic diagram of a subcarrier planning for a 20MHz bandwidth, such as Figure 2 As shown, a 20MHz bandwidth channel consists of 39 consecutive subcarriers with a 480kHz spacing. These 39 subcarriers are numbered 0, 1, ..., 38, in ascending order of frequency. Subcarrier 19 (the 20th subcarrier) is a DC subcarrier and carries no information. In a 20MHz bandwidth channel, portions of the lowest and highest frequencies are reserved as guard intervals, the left guard interval and the right guard interval, respectively. Table 1 shows the parameters for a 20MHz bandwidth channel.

[0110] Table 1: Parameters for 20MHz bandwidth

[0111] parameter 20MHz fs (sampling frequency) 30.72MHz <![CDATA[N DFT (DFT score) 64 ΔF (subcarrier spacing) 480KHz <![CDATA[T DFT (symbol period)]]> 1 / 0.480=2.08μs <![CDATA[T s (sampling interval)]]> 1 / 0.03072=32.55ns <![CDATA[T GI =5T s (Short guard interval)]]> 5 / 0.03072=162.76ns <![CDATA[T GI =14T s (Long guard interval)]]> 14 / 0.03072=455.73ns

[0112] In Table 1 above, the number of DFT points can be understood as the number of sampling points used in the DFT process or the size of the filter used in the DFT process. The number of DFT points can also be replaced by the number of inverse discrete Fourier transform (IDFT) points, IDFT size, or DFT size. The sampling frequency is equal to the product of the number of DFT points and the subcarrier spacing. The symbol period is determined by the subcarrier spacing. The sampling interval is determined by the sampling frequency. The specific meanings of the various parameters shown in Table 1 can be referred to existing communication standards and will not be repeated here.

[0113] Furthermore, based on the parameters of subcarrier planning of a 20 MHz working bandwidth, in the low frequency band, there may be parameters as shown in Table 2.

[0114] Table 2: Parameters of different bandwidths in the low-frequency band

[0115]

[0116]

[0117] It is understandable that Table 2 only illustrates 40 MHz (aggregated by two 20 MHz bandwidths), 80 MHz (aggregated by four 20 MHz bandwidths), and 160 MHz (aggregated by eight 20 MHz bandwidths). Parameters for larger operating bandwidths can be deduced similarly.

[0118] Tables 1 and 2 above use the example of "64 DFT points for a 20 MHz bandwidth." In other examples, the DFT point number for a 20 MHz bandwidth can be greater than 64. For example, the DFT point number for a 20 MHz bandwidth can be 256 (i.e., 64*4). In this case, a 20 MHz operating bandwidth channel consists of 39*4 consecutive subcarriers. See Table 3 for parameters for different bandwidths.

[0119] Table 3: Parameters of different bandwidths in the low-frequency band

[0120]

[0121] It is understandable that Table 3 only illustrates 40 MHz (aggregated by 2 20 MHz bandwidths), 80 MHz (aggregated by 4 20 MHz bandwidths) and 160 MHz (aggregated by 8 20 MHz bandwidths), and the parameters of larger working bandwidths can be deduced similarly.

[0122] (3) Superframe and radio frame

[0123] Star Flash communication technology adopts TDD mode. Specifically, Star Flash communication technology (such as SLB access technology) uses superframes to realize communication between G-node devices and T-node devices. A superframe contains 48 radio frames, and each radio frame includes 10 symbols. The symbol can be an OFDM symbol or a DFT-s-OFDM symbol, where the DFT-s-OFDM symbol can be understood as a special OFDM symbol. In addition, the Star Flash communication system also supports a half superframe containing 24 radio frames. In the parameters of the low-frequency band shown in Table 1 or Table 2, the duration of each symbol (i.e., the symbol period) is approximately 2.0833 microseconds (μs), the duration of each radio frame is approximately 20.833 μs, and the duration of each superframe is approximately 1 millisecond (ms).

[0124] Figure 3 A possible superframe structure diagram is shown in FIG. Figure 3As shown, the superframe includes radio frames 0 to 47. For example, the 10 OFDM symbols included in radio frame 0 include 4 G symbols, 3 T symbols, 2 GAP symbols, and 1 SG symbol; the 10 OFDM symbols included in radio frame 47 include 4 G symbols, 3 T symbols, 2 GAP symbols, and 1 ST symbol. A G symbol represents a symbol in which a G-node device transmits (G link) information to a T-node device, and a T-node represents a symbol in which a T-node device transmits (T link) information to a G-node device. SG / ST represent symbol resources that can be used for overhead symbols in G / T symbols, respectively. The overhead symbol resources of each radio frame can be flexibly configured to 0, 1, or 2 symbols. GAP is the switching interval between G symbols and T symbols.

[0125] According to the above introduction to Star Flash communication technology, it can be seen that Star Flash communication technology currently supports low-frequency bands. Since high-frequency bands (such as millimeter wave bands) can provide transmission rates of up to Gbps, high-frequency bands have become very promising bands for future short-range wireless communications. However, since the parameters of Star Flash communication technology in low-frequency bands cannot be directly applied to high-frequency bands, such as the high-frequency bands have more prominent phase noise and other effects, if the parameters in the low-frequency bands are directly applied to the high-frequency bands, it will result in poor transmission performance.

[0126] Based on this, the embodiment of the present application will study the relevant implementation of the star flash communication technology in the high-frequency band. Specifically, the embodiment of the present application provides a communication method and device for realizing the design of the parameters of the high-frequency band based on the parameters of the low-frequency band, so that the subcarrier spacing of the high-frequency band is larger than the subcarrier spacing of the low-frequency band, which is convenient for overcoming the more prominent phase noise and other effects of the high-frequency band and improving the transmission performance. Among them, the method and the device are based on the same concept. Since the principles of solving the problem by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0127] To facilitate understanding of the embodiments of the present application, first Figure 4 The network architecture shown in FIG is used as an example to describe in detail the network architecture applicable to the embodiment of the present application. Figure 4 As shown, the network architecture includes multiple communication devices (such as a first communication device and a second communication device), and the first communication device and the second communication device are both configured with Figure 1 The communication protocol architecture shown in the figure can communicate with each other using Star Flash communication technology based on the communication protocol architecture.

[0128] The communication devices (such as the first communication device and the second communication device) in the embodiments of the present application can be devices in various fields. For example, large-screen devices, artificial intelligence (AI) speakers, high-fidelity (HiFi) speakers, temperature sensors or humidity sensors in the field of smart homes; or mobile phones, tablet computers, wearable devices, augmented reality (AR) / virtual reality (VR) devices, laptops, ultra mobile personal computers (UMPC), netbooks or personal digital assistants (PDAs) in the field of smart terminals; or robotic arms, cameras, joysticks, monitors, logistics vehicles or smart shelves in the field of smart manufacturing. The embodiments of the present application do not limit the specific types of communication devices.

[0129] Exemplarily, the first communication device is a G-node device, and the second communication device is a T-node device; or, the second communication device is a G-node device, and the first communication device is a T-node device. In one possible implementation, the role of a communication device can be determined based on the input and output conditions of the communication device, including whether the communication device supports information input through devices such as a mouse, keyboard, or screen, and whether it supports information output through devices such as a screen or speaker. For example, for devices such as mobile phones and tablets that are convenient for users to input information, their role is usually a T-node, and they act as T-node devices by default during the SLB connection process. For devices such as large-screen devices and smart speakers that are not convenient for users to input information, their role is usually a G-node, and they act as G-node devices by default during the SLB connection process.

[0130] It can be understood that the communication method provided in the embodiment of the present application is applicable to communication between G-node devices and T-node devices, and can also be applicable to communication between G-node devices and G-node devices, or communication between T-node devices and T-node devices, without specific limitation.

[0131] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

[0132] Although the embodiments of the present application are mainly described by taking the deployment of the Star Flash communication network as an example, and in particular the SLB communication network as an example, it will be readily understood by those skilled in the art that the various aspects involved in the embodiments of the present application can be extended to other networks that adopt various standards or protocols, such as high-performance wireless local area networks (HIPERLAN), wireless wide area networks (WWAN), wireless personal area networks (WPAN), or other networks now known or developed in the future. Therefore, regardless of the coverage range and wireless access protocol used, the various aspects provided in the embodiments of the present application can be applied to any suitable wireless network.

[0133] The technical solutions of the embodiments of the present application can also be applied to various communication systems or networks, such as: WLAN communication system, wireless fidelity (Wi-Fi) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, universal mobile telecommunication system (UMTS) system, world-wide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) system or new radio (NR) system, sixth generation (6G) system, Internet of Things (IoT) network or vehicle tox (V2X), etc. The above-mentioned communication systems applicable to the present application are only examples, and the communication systems applicable to the present application are not limited thereto. They are uniformly described here and will not be repeated below.

[0134] based on Figure 4 The network architecture shown in FIG. 1 is shown in FIG. 2 , and the communication method provided by the embodiment of the present application is described in detail in conjunction with the first embodiment and the second embodiment. The communication method provided by the embodiment of the present application involves a first communication device and a second communication device, wherein the first communication device can be Figure 4 The first communication device in the communication apparatus, or may be a component of the first communication device, such as a chip or chip system provided in the first communication device; the second communication device may be Figure 4 The second communication device in the illustrated communication system may also be a component in the second communication device, such as a chip or chip system provided in the second communication device.

[0135] Example 1

[0136] Figure 5 This is a flow chart corresponding to the communication method provided in the embodiment of the present application. Figure 5 As shown, the method includes:

[0137] S501: A first communication device generates one or more OFDM symbols in a radio frame.

[0138] For example, the radio frame herein may be any of the superframes or half-superframes employed by the StarFlash communication technology. If the first communication device is a G-node device, the OFDM symbol is a G symbol; if the first communication device is a T-node device, the OFDM symbol is a T symbol. For details, see the above description of superframes, radio frames, and OFDM symbols.

[0139] S502: A first communication device sends one or more OFDM symbols on a first channel in a first frequency band; correspondingly, a second communication device receives one or more OFDM symbols on a first channel in the first frequency band.

[0140] S503: The second communication device processes one or more OFDM signals.

[0141] Exemplarily, a first communication device generates one or more OFDM symbols in a radio frame based on a first number of points, and then transmits the one or more OFDM symbols on a first channel in a first frequency band. Accordingly, a second communication device processes the received one or more OFDM symbols based on the first number of points. The first number of points may be a DFT number or an IDFT number corresponding to the bandwidth of the first channel in the first frequency band.

[0142] It should be noted that S503 may be an optional step. In addition, the embodiment of the present application does not limit the specific implementation of the first communication device generating OFDM symbols and the second communication device processing OFDM symbols.

[0143] The lowest frequency of the above-mentioned first frequency band is higher than the highest frequency of the second frequency band. For example, the first frequency band is a high-frequency band (such as a millimeter wave band) and the second frequency band is a low-frequency band. The millimeter wave band can be understood as a frequency band with a wavelength of millimeters, such as a frequency band with a wavelength of 1-10 mm. For example, the millimeter wave band can be a 30-300 gigahertz (GHz) band. Exemplarily, the first frequency band is a 60GHz band, or the first frequency band is a 45GHz band; the second frequency band is a 2.45GHz band, or the second frequency band is a 5GHz / 6GHz band. For example, the 45GHz band includes 42.3-47.0GHz and 47.2-48.4GHz, and the 60GHz band includes 57-66GHz and 56.16-73.44GHz.

[0144] The subcarrier spacing of the first channel is 2 times the subcarrier spacing of the second channel in the second frequency band. N times, the subcarrier spacing of the second channel is 480KHz, and N is an integer greater than 0. The bandwidth of the second channel is 2 P *20MHz, the bandwidth of the first channel is 2 N *2 P *20MHZ, that is, the bandwidth of the second channel corresponds to the same number of DFT points as the bandwidth of the first channel. For example, the bandwidth of the first channel and the bandwidth of the second channel correspond to the same number of DFT points as 2 P *64, or the number of DFT points corresponding to the bandwidth of the first channel and the bandwidth of the second channel is 2 P *256, where P is an integer greater than or equal to 0.

[0145] The following examples 1 to 3 are used to illustrate the parameters of the high frequency band (such as the bandwidth of the first channel and the number of DFT points corresponding to the bandwidth of the first channel). Among them, Example 1 and Example 2 are based on the assumption that the bandwidth of the first channel and the number of DFT points corresponding to the bandwidth of the second channel are 2. P *64" as an example, Example 3 is based on "the number of DFT points corresponding to the bandwidth of the first channel and the bandwidth of the second channel is 2 P *256" as an example. In addition, for the convenience of description, the present application introduces the concept of sub-channel: the bandwidth of the sub-channel on the first frequency band is the minimum channel bandwidth supported by the first frequency band, and the first channel includes one or more sub-channels on the first frequency band; the bandwidth of the sub-channel on the second frequency band is the minimum channel bandwidth supported by the second frequency band, and the second channel includes one or more sub-channels on the second frequency band. The sub-channel can also be called the basic channel, and the specific name is not limited. Among them, the bandwidth of the sub-channel on the second frequency band is 20MHz, and the bandwidth of the sub-channel on the first frequency band is 20MHz*2 N times.

[0146] Example 1

[0147] In Example 1, assuming N=3, the subcarrier spacing of the first channel is 8 times the subcarrier spacing of the second channel, and the subcarrier spacing of the first channel is 3.84 MHz; and the bandwidth of the subchannel on the first frequency band is 160 MHz. The first channel can be aggregated by one or more subchannels (160 MHz), for example, the bandwidth of the first channel can be 160 MHz, 320 MHz, 640 MHz, 1280 MHz, 2560 MHz, etc.

[0148] Specifically, when P=1, the bandwidth of the first channel is 160 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 64.

[0149] When P=2, the bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 128.

[0150] When P=3, the bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256.

[0151] When P=4, the bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512.

[0152] When P=5, the bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024.

[0153] It should be understood that only several possible bandwidths of the first channel are listed here. The bandwidth of the first channel can also be other possible bandwidths, which will not be detailed here. Here, "the bandwidth of the first channel is 160 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 64" is used as an example. In other possible implementations, when the bandwidth of the first channel is 160 MHz, the number of DFT points corresponding to the bandwidth of the first channel can also be greater than 64, for example, the number of DFT points corresponding to the bandwidth of the first channel can be 128.

[0154] Example 2

[0155] In Example 2, assuming N=2, the subcarrier spacing of the first channel is 4 times the subcarrier spacing of the second channel, and the subcarrier spacing of the first channel is 1.92 MHz; and the bandwidth of the subchannel on the first frequency band is 80 MHz. The first channel can be aggregated by one or more subchannels (80 MHz), for example, the bandwidth of the first channel can be 80 MHz, 160 MHz, 320 MHz, 640 MHz, 1280 MHz, 2560 MHz, etc.

[0156] Specifically, when P=1, the bandwidth of the first channel is 80 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 64.

[0157] When P=2, the bandwidth of the first channel is 160 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 128.

[0158] When P=3, the bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256.

[0159] When P=4, the bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512.

[0160] When P=5, the bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024.

[0161] When P=6, the bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 2048.

[0162] It should be understood that only several possible bandwidths of the first channel are listed here. The bandwidth of the first channel can also be other possible bandwidths, which will not be detailed here. Here, "the bandwidth of the first channel is 80 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 64" is used as an example. In other possible implementations, when the bandwidth of the first channel is 80 MHz, the number of DFT points corresponding to the bandwidth of the first channel can also be greater than 64, for example, the number of DFT points corresponding to the bandwidth of the first channel can be 128.

[0163] The parameters of the high frequency band provided in Examples 1 and 2 above can be understood as being obtained by performing a clock-up operation based on the parameters of the low frequency band in Table 2. The multiple of the clock-up is x, and x is a positive number, as shown in Table 4. Furthermore, x can be an integer greater than 1, such as x=2 N .

[0164] Table 4: Clock-up operation diagram

[0165]

[0166]

[0167] Based on Table 4, if N=3 (x=8), the parameters of the high frequency band obtained by the clock-up operation are shown in Table 5, ie, the parameters of the high frequency band with different bandwidths provided in Example 1.

[0168] Table 5: Parameters of different bandwidths in the high-frequency band

[0169]

[0170] Based on Table 4, if N=2 (x=4), the parameters of the high frequency band obtained by the clock-up operation are shown in Table 6, ie, the parameters of the high frequency band with different bandwidths provided in Example 2.

[0171] Table 6: Parameters of different bandwidths in the high frequency band

[0172]

[0173] Example 3

[0174] In Example 3, assuming N=4, the subcarrier spacing of the first channel is 16 times the subcarrier spacing of the second channel, and the subcarrier spacing of the first channel is 1.92 MHz; and the bandwidth of the subchannel on the first frequency band is 320 MHz. The first channel can be aggregated by one or more subchannels (320 MHz), for example, the bandwidth of the first channel can be 320 MHz, 640 MHz, 1280 MHz, 2560 MHz, etc.

[0175] Specifically, when P=1, the bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256.

[0176] When P=2, the bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512.

[0177] When P=3, the bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024.

[0178] When P=4, the bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 2048.

[0179] It should be understood that only several possible bandwidths for the first channel are listed here. The bandwidth of the first channel can also be other possible bandwidths, which will not be detailed here. Here, "the bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256" is used as an example. In other possible implementations, when the bandwidth of the first channel is 320 MHz, the number of DFT points corresponding to the bandwidth of the first channel can also be greater than 256, for example, the number of DFT points corresponding to the bandwidth of the first channel can be 512.

[0180] The parameters of the high frequency band provided in Example 3 above can be understood as being obtained by performing a clock-up operation based on the parameters of the low frequency band in Table 3. The multiple of the clock-up is x, and x is a positive number, as shown in Table 7. Furthermore, x can be an integer greater than 1, such as x=2 N .

[0181] Table 7: Clock-up operation diagram

[0182]

[0183]

[0184] Based on Table 7, if N=4 (x=16), the parameters of the high frequency band obtained by the clock-up operation are shown in Table 8, ie, the parameters of the high frequency band with different bandwidths provided in Example 3.

[0185] Table 8: Parameters of different bandwidths in the high frequency band

[0186]

[0187] It is understandable that, based on the above description of the parameters for the high-frequency band, the symbol period in the high-frequency band is smaller than the symbol period in the low-frequency band. Therefore, for the high-frequency band, the design of the low-frequency band can be adopted, such as each superframe includes 48 radio frames, and each radio frame includes 10 OFDM symbols. Alternatively, for the high-frequency band, the number of radio frames included in the superframe and the number of OFDM symbols included in the radio frame can be flexibly designed. For example, on the basis of ensuring that the superframe duration is 1ms, the number of radio frames included in the superframe and / or the number of OFDM symbols included in the radio frame can be adaptively adjusted. In other words, the high-frequency band can follow the design framework of "superframe-radio frame-OFDM symbol" without limiting the specific proportional relationship between superframes, radio frames, and OFDM symbols.

[0188] Using the above method, the subcarrier spacing of the first channel is 2 times the subcarrier spacing of the second channel in the second frequency band. N times; thus, the subcarrier spacing of the low frequency band is increased by 2 N times to obtain the subcarrier spacing of the high frequency band, so that the subcarrier spacing of the high frequency band is larger than that of the low frequency band, thereby overcoming the more prominent phase noise in the high frequency band and improving the transmission performance. The bandwidth of the second channel is 2 P *20MHz, the bandwidth of the first channel is 2 N *2 P *20 MHz, that is, the number of DFT points corresponding to the bandwidth of the second channel is the same as that of the first channel. This allows the low-frequency band and the high-frequency band to share signal processing components, such as DFT / IDFT components, thereby reducing the cost and complexity of the baseband chips that process low-frequency and high-frequency signals.

[0189] Example 2

[0190] Based on the parameters of the high frequency band designed in Example 1, the subcarrier planning of the first channel will be further studied in Example 2. The explanation of the relevant terms or nouns in Example 2 can refer to Example 1.

[0191] Taking "the bandwidth of the subchannel on the first frequency band is 160MHz and the subcarrier spacing is 3.84MHz" as an example, the remaining range of the left and right frequency domains of the subchannel is 160MHz-39*3.84MHz=10.24MHz, that is, in order to fill 160MHz, there is still an available frequency domain range of 10.24MHz. If the left and right sides are the same, that is, both sides use 5.12MHz, then when the first channel includes multiple subchannels, such as the first channel includes subchannel a and subchannel b, see Figure 6 As shown, the interval between the subcarriers corresponding to subchannel a and subchannel b is 5.12MHz+5.12MHz=10.24MHz, which is not an integer multiple of the subcarrier interval (10.24 / 3.84 is not equal to an integer), which will cause interference between subchannels or interference between carriers when sending OFDM symbols on the first channel.

[0192] Based on this, in the embodiment of the present application, the first channel may include a left guard interval, a right guard interval, and Q subcarriers located between the left guard interval and the right guard interval, where Q is an integer greater than 1, see Figure 7 As shown. Among them, the lowest frequency of the left guard interval is the lowest frequency of the first channel, and the highest frequency of the right guard interval is the highest frequency of the first channel. The bandwidth between the left guard interval and the right guard interval is Q times the subcarrier spacing of the first channel, and the bandwidth between the left guard interval and the right guard interval can be understood as the bandwidth between the highest frequency of the left guard interval and the lowest frequency of the right guard interval. In this way, when the first channel includes multiple subchannels, since the bandwidth between the left guard interval and the right guard interval is an integer multiple of the subcarrier spacing of the first channel, that is, the interval between the subcarriers corresponding to any two adjacent subchannels is an integer multiple of the subcarrier spacing of the first channel, the interference between subchannels or the interference between carriers can be effectively reduced.

[0193] For example, as described in Example 1, the number of DFT points of the subchannel on the first frequency band can be 64 (that is, the subchannel on the first frequency band includes 39 subcarriers), or the number of DFT points of the subchannel on the first frequency band can also be 256 (that is, the subchannel on the first frequency band includes 39*4 subcarriers). These two situations are described below as examples.

[0194] Case 1: The number of DFT points of the subchannel in the first frequency band is 64.

[0195] (1) Describe the specific values ​​of the left guard interval and the right guard interval

[0196] Exemplarily, when the bandwidth between the left guard interval and the right guard interval is an integer multiple of the subcarrier spacing of the first channel, there are multiple specific values ​​of the left guard interval and the right guard interval, which are illustrated below in combination with Example 1 and Example 2.

[0197] Example 1

[0198] In Example 1, the subchannel on the first frequency band is 160 MHz, the subcarrier spacing is 3.84 MHz, and the first channel includes 2 P subchannels. In addition to the 39 subcarriers, the available frequency domain range of the subchannel is 10.24MHz. Therefore, the available frequency domain range on the left side of the subchannel and the available frequency domain range on the right side may include three situations: Scenario 1, the available frequency domain range on the left side of the subchannel may be 3.84MHz, and the available frequency domain range on the right side of the subchannel may be 6.4MHz; Scenario 2, the available frequency domain range on the left side of the subchannel may be 5.12MHz, and the available frequency domain range on the right side of the subchannel may be 5.12MHz; Scenario 3, the available frequency domain range on the left side of the subchannel may be 6.4MHz, and the available frequency domain range on the right side of the subchannel may be 3.84MHz. It can be understood that the embodiments of the present application take these three situations as an example, and there may be other possibilities for the available frequency domain range on the left side of the subchannel and the available frequency domain range on the right side, which are not limited.

[0199] When the first channel includes multiple sub-channels, the multiple sub-channels are numbered 0, 1, 2...2 in order from low to high according to the corresponding frequency. P -1. As a possible implementation, these multiple sub-channels (i.e. sub-channels 0, 1, 2...2 P -1) The available frequency domain range on the left and the available frequency domain range on the right can be designed cyclically according to Case 1, Case 2, and Case 3, as shown in Table 9.

[0200] Table 9: Examples of available frequency domain ranges on the left and right sides of multiple subchannels

[0201]

[0202] Taking Table 9 as an example, when the first channel includes one or more sub-channels, the left guard interval of the first channel is 3.84 MHz; when Pmod2 = 1, the right guard interval of the first channel is 5.12 MHz, or when Pmod2 = 0, the right guard interval of the first channel is 6.4 MHz. Wherein, "mod" represents the modulo operation, "Pmod2 = 1" can also be replaced by "P is an odd number", and "Pmod2 = 0" can also be replaced by "P is an even number".

[0203] Specifically, when the first channel includes one subchannel (i.e., P=0, the first channel includes subchannel 0), the left guard interval of the first channel (i.e., the frequency domain range available to the left of subchannel 0) is 3.84 MHz, and the right guard interval of the first channel (i.e., the frequency domain range available to the right of subchannel 0) is 6.4 MHz. Figure 8 As shown in (a) in .

[0204] When the first channel includes two subchannels (i.e., P=1, the first channel includes subchannel 0 and subchannel 1), the left guard interval of the first channel (i.e., the available frequency range to the left of subchannel 0) is 3.84 MHz, and the right guard interval of the first channel (i.e., the available frequency range to the right of subchannel 1) is 5.12 MHz. Figure 8 As shown in (b) in .

[0205] When the first channel includes four subchannels (i.e., P=2, the first channel includes subchannels 0 to 3), the left guard interval of the first channel (i.e., the available frequency range to the left of subchannel 0) is 3.84 MHz, and the right guard interval of the first channel (i.e., the available frequency range to the right of subchannel 3) is 6.4 MHz. Figure 8 As shown in (c) in .

[0206] When the first channel includes 8 subchannels (i.e., P=3, the first channel includes subchannel 0 to subchannel 7), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 3.84 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 7) is 5.12 MHz.

[0207] It is understandable that when the first channel includes more sub-channels, this can be understood by reference and will not be listed one by one here.

[0208] As another possible implementation, the available frequency domain ranges on the left and right of the multiple sub-channels may be designed cyclically according to Case 2, Case 3, and Case 1, as shown in Table 10.

[0209] Table 10: Example of available frequency domain ranges on the left and right sides of multiple sub-channels

[0210]

[0211] Taking Table 10 as an example, when the first channel includes one or more sub-channels, the left guard interval of the first channel is 5.12 MHz; when Pmod2=1, the right guard interval of the first channel is 3.84 MHz, or when Pmod2=0, the right guard interval of the first channel is 5.12 MHz.

[0212] Specifically, when the first channel includes 1 subchannel (i.e., P=0, the first channel includes subchannel 0), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 5.12 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 0) is 5.12 MHz.

[0213] When the first channel includes two subchannels (i.e., P=1, the first channel includes subchannel 0 and subchannel 1), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 5.12 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 1) is 3.84 MHz.

[0214] When the first channel includes 4 subchannels (i.e., P=2, the first channel includes subchannel 0 to subchannel 3), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 5.12 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 3) is 5.12 MHz.

[0215] When the first channel includes 8 subchannels (i.e., P=3, the first channel includes subchannel 0 to subchannel 7), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 5.12 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 7) is 3.84 MHz.

[0216] It is understandable that when the first channel includes more sub-channels, this can be understood by reference and will not be listed one by one here.

[0217] As another possible implementation, the available frequency domain ranges on the left and right of the multiple sub-channels may be designed cyclically according to Case 3, Case 1, and Case 2, as shown in Table 11.

[0218] Table 11: Example of available frequency domain ranges on the left and right sides of multiple sub-channels

[0219]

[0220]

[0221] Taking Table 11 as an example, when the first channel includes one or more sub-channels, the left guard interval of the first channel is 6.4 MHz; when Pmod2=1, the right guard interval of the first channel is 6.4 MHz, or when Pmod2=0, the right guard interval of the first channel is 3.84 MHz.

[0222] Specifically, when the first channel includes 1 subchannel (i.e., P=0, the first channel includes subchannel 0), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 6.4 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 0) is 3.84 MHz.

[0223] When the first channel includes two subchannels (i.e., P=1, the first channel includes subchannel 0 and subchannel 1), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 6.4 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 1) is 6.4 MHz.

[0224] When the first channel includes 4 subchannels (i.e., P=2, the first channel includes subchannel 0 to subchannel 3), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 6.4 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 3) is 3.84 MHz.

[0225] When the first channel includes 8 subchannels (i.e., P=3, the first channel includes subchannel 0 to subchannel 7), the left guard interval of the first channel (i.e., the available frequency domain range to the left of subchannel 0) is 6.4 MHz, and the right guard interval of the first channel (i.e., the available frequency domain range to the right of subchannel 7) is 6.4 MHz.

[0226] It is understandable that when the first channel includes more sub-channels, this can be understood by reference and will not be listed one by one here.

[0227] Example 2

[0228] In Example 2, the sub-channel on the first frequency band is 80 MHz, the sub-carrier spacing is 1.92 MHz, and the first channel includes 2 P subchannels. In addition to the 39 subcarriers, the available frequency domain range of the subchannel is 5.12MHz. Therefore, the available frequency domain range on the left side of the subchannel and the available frequency domain range on the right side can include three situations: situation 1, the available frequency domain range on the left side of the subchannel can be 1.92MHz, and the available frequency domain range on the right side of the subchannel can be 3.2MHz; situation 2, the available frequency domain range on the left side of the subchannel can be 2.56MHz, and the available frequency domain range on the right side of the subchannel can be 2.56MHz; situation 3, the available frequency domain range on the left side of the subchannel can be 3.2MHz, and the available frequency domain range on the right side of the subchannel can be 1.92MHz. It can be understood that the embodiments of the present application take these three situations as examples, and there may be other possibilities for the available frequency domain range on the left side of the subchannel and the available frequency domain range on the right side, which are not limited.

[0229] When the first channel includes multiple sub-channels, the multiple sub-channels are numbered 0, 1, 2...2 in order from low to high according to the corresponding frequency. P -1. As a possible implementation, these multiple sub-channels (i.e. sub-channels 0, 1, 2...2 P -1) The available frequency domain range on the left and the available frequency domain range on the right can be designed cyclically according to Case 1, Case 2, and Case 3, as shown in Table 12.

[0230] Table 12: Example of available frequency domain ranges on the left and right sides of multiple sub-channels

[0231]

[0232] Taking Table 12 as an example, when the first channel includes one or more sub-channels, the left guard interval of the first channel is 1.92 MHz; when Pmod2=1, the right guard interval of the first channel is 2.56 MHz, or when Pmod2=0, the right guard interval of the first channel is 3.2 MHz, and the details are not repeated here.

[0233] As another possible implementation, the available frequency domain ranges on the left and right of the multiple sub-channels may be designed cyclically according to Case 2, Case 3, and Case 1, as shown in Table 13.

[0234] Table 13: Example of available frequency domain ranges on the left and right of multiple sub-channels

[0235]

[0236] Taking Table 13 as an example, when the first channel includes one or more sub-channels, the left guard interval of the first channel is 2.56 MHz; when Pmod2=1, the right guard interval of the first channel is 1.92 MHz, or when Pmod2=0, the right guard interval of the first channel is 2.56 MHz, and the details are not repeated here.

[0237] As another possible implementation, the available frequency domain ranges on the left and right of the multiple sub-channels may be designed cyclically according to Case 3, Case 1, and Case 2, as shown in Table 14.

[0238] Table 14: Example of available frequency domain ranges on the left and right of multiple sub-channels

[0239]

[0240] Taking Table 14 as an example, when the first channel includes one or more sub-channels, the left protection interval of the first channel is 3.2 MHz; when Pmod2 = 1, the right protection interval of the first channel is 3.2 MHz, or when Pmod2 = 0, the right protection interval of the first channel is 1.92 MHz, and the details are not repeated here.

[0241] It is understandable that the above examples 1 and 2 are based on the principle that the subcarrier spacing is 3.84 MHz (x=2 N =8)" and "subcarrier spacing is 1.92MHz (x=2 N =4)" is described as an example. In an embodiment of the present application, when the subcarrier spacing is other possible values, or the first channel includes other numbers of subchannels, the left guard interval and the right guard interval of the first channel can be processed with reference to the above. That is, the available frequency domain range on the left and the available frequency domain range on the right of the multiple subchannels of the first channel can be as shown in Table 15.

[0242] Table 15: Example of available frequency domain ranges on the left and right of multiple sub-channels

[0243]

[0244] In Table 15, subchannel i may be subchannel 0 among multiple subchannels, or may be subchannel 1 among multiple subchannels, or may be subchannel 2 among multiple subchannels, without specific limitation.

[0245] (2) Describe the Q subcarriers.

[0246] When the first channel includes 1 sub-channel, Q=39, the DC sub-carrier can be the 20th sub-carrier among the 39 sub-carriers, and the 38 sub-carriers other than the DC sub-carrier are occupied sub-carriers. The occupied sub-carriers include data sub-carriers and / or pilot sub-carriers, that is, data sub-carriers and pilot sub-carriers are collectively referred to as occupied sub-carriers. In this case, the sub-carrier planning of the first channel is the same as Figure 2 The subcarrier planning for 20MHz bandwidth in the mid- and low-frequency bands is similar.

[0247] The first channel includes multiple sub-channels (such as sub-channel 0, sub-channel 1, sub-channel 2...sub-channel 2). P -1), the DC subcarrier and occupied subcarrier of the first channel are introduced.

[0248] The Q subcarriers are ordered from low to high based on frequency, that is, the frequencies of the first subcarrier to the Qth subcarrier are ordered from low to high. The Q subcarriers include Q1 subcarriers, where Q1 subcarrier is a DC subcarrier, Q1 is an integer greater than or equal to 1, and Q1 is less than Q. Some or all of the (Q-Q1) subcarriers in the Q subcarriers other than Q1 subcarrier are occupied subcarriers. For example, if the Q subcarriers also include Q2 subcarriers, Q2 subcarrier is an occupied subcarrier.

[0249] Exemplarily, Q1 subcarriers are one or more subcarriers located in the middle of the Q subcarriers. The embodiment of the present application does not limit the number of DC subcarriers. The DC subcarrier and occupied subcarriers are described below in conjunction with implementation method 1 and implementation method 2.

[0250] Implementation 1

[0251] When Qmod2=1 (i.e., Q is an odd number), the Q1 subcarriers include at least one of the (Q-1) / 2th subcarrier, the (Q+1) / 2th subcarrier, and the {(Q+1) / 2}+1th subcarrier among the Q subcarriers; for example, the Q1 subcarrier includes the (Q-1) / 2th subcarrier, the (Q+1) / 2th subcarrier, and the {(Q+1) / 2}+1th subcarrier, that is, the Q1 subcarrier is the three subcarriers located in the middle of the Q subcarriers. Alternatively, when Qmod2=0 (i.e., Q is an even number), the Q1 subcarrier includes at least one of the Q / 2th subcarrier and the Q / 2+1th subcarrier among the Q subcarriers; for example, the Q1 subcarrier includes the Q / 2th subcarrier and the Q / 2+1th subcarrier, that is, the Q1 subcarrier is the two subcarriers located in the middle of the Q subcarriers. In this way, since the DC subcarrier is the subcarrier located in the middle position among the Q subcarriers, it is easy to avoid the DC influence caused by using the subcarrier in the middle position as a data or pilot subcarrier, thereby improving the receiving performance.

[0252] That is to say, the method of combining multiple sub-channels into a large channel provided in the embodiment of the present application can convert all or part of the DC sub-carriers originally belonging to the sub-channel into data or pilot sub-carriers, and part or all of the DC sub-carriers of the large channel can be obtained by utilizing the protection interval of the original small sub-channel, and the protection interval of the original small sub-channel can also be used as a data sub-carrier or pilot sub-carrier, thereby helping to improve communication efficiency and frequency band utilization.

[0253] For example, see Figure 9 As shown, taking the first channel including 4 sub-channels as an example, the sub-carrier planning of each sub-channel is similar to Figure 2The subcarrier planning of 20MHz bandwidth in the medium and low frequency bands means that the 20th subcarrier in each subchannel is a DC subcarrier, and the number of occupied subcarriers is 38. However, with the design of the embodiment of the present application, the 20th subcarrier in each subchannel is not used as a DC subcarrier, but can be used as a data subcarrier or a pilot subcarrier.

[0254] Since the interval between the subcarriers corresponding to any two adjacent subchannels in a plurality of subchannels is an integer multiple of the subcarrier interval, the interval between the subcarriers corresponding to any two adjacent subchannels may include at least one of a DC subcarrier, a data subcarrier, and a pilot subcarrier, using the design of the embodiment of the present application. For example, for subchannel 1 and subchannel 2 (i.e., two adjacent subchannels located in the middle position of the first channel), the interval between the subcarriers corresponding to subchannel 1 and subchannel 2 includes a DC subcarrier, and optionally, also includes a data subcarrier and / or a pilot subcarrier. As Figure 9 As shown in FIG, the interval between the subcarriers corresponding to subchannel 1 and subchannel 2 includes 3 subcarriers. These 3 subcarriers can be used as DC subcarriers, or one of the middle subcarriers can be used as a DC subcarrier, and the other subcarriers can be used as data subcarriers or pilot subcarriers. Except for the two adjacent subchannels located in the middle, the interval between the subcarriers corresponding to any other two adjacent subchannels includes data subcarriers and / or pilot subcarriers. Figure 9 As shown, the interval between the subcarriers corresponding to subchannel 0 and subchannel 1 includes three subcarriers, which can be used as data subcarriers or pilot subcarriers; the interval between the subcarriers corresponding to subchannel 2 and subchannel 3 includes three subcarriers, which can be used as data subcarriers or pilot subcarriers. In this way, the number of occupied subcarriers in the first channel is greater than the product of the number of subchannels included in the first channel and the number of occupied subcarriers in a single subchannel (i.e., 38), thereby helping to improve communication efficiency and frequency band utilization.

[0255] Taking the guard interval shown in Table 9 as an example, when P = 1, the first channel includes two subchannels, and the number of occupied subcarriers in the first channel is greater than 76, then Q = 81. For example, if the first channel includes three DC subcarriers, the maximum number of occupied subcarriers in the first channel is 78. For another example, if the first channel includes one DC subcarrier, the maximum number of occupied subcarriers in the first channel is 80.

[0256] When P = 2, the first channel includes 4 subchannels, the number of occupied subcarriers in the first channel is greater than 152, and Q = 164. For example, if the first channel includes 2 DC subcarriers, the maximum number of occupied subcarriers in the first channel is 162.

[0257] When P = 3, the first channel includes 8 subchannels, the number of occupied subcarriers in the first channel is greater than 304, and Q = 331. For example, if the first channel includes 3 DC subcarriers, the maximum number of occupied subcarriers in the first channel is 328.

[0258] When P = 4, the first channel includes 16 subchannels, and the number of occupied subcarriers in the first channel is greater than or equal to 608, then Q = 664. For example, if the first channel includes 2 DC subcarriers, the maximum number of occupied subcarriers in the first channel is 662.

[0259] When P = 5, the first channel includes 32 subchannels, the number of occupied subcarriers in the first channel is greater than or equal to 1216, and Q = 1331. For example, if the first channel includes 3 DC subcarriers, the maximum number of occupied subcarriers in the first channel is 1328.

[0260] Implementation 2

[0261] Based on Example 1 above, taking the case where the first channel includes two subchannels, that is, the bandwidth of the first channel is 320 MHz, there are three cases for the left guard interval and the right guard interval of the first channel, namely, case A, case B, and case C. Case A: The left guard interval is 3.84 MHz, the right guard interval is 5.12 MHz, and the Q subcarriers in the first channel are 81 subcarriers; case B: The left guard interval is 5.12 MHz, the right guard interval is 3.84 MHz, and the Q subcarriers in the first channel are 81 subcarriers; case C: The left guard interval is 6.4 MHz, the right guard interval is 6.4 MHz, and the Q subcarriers in the first channel are 80 subcarriers.

[0262] For case A or case B, assuming that the three middle subcarriers among the Q subcarriers are DC subcarriers (i.e., Q1 = 3), the occupied subcarriers include the 39 subcarriers to the left of the DC subcarrier and the 39 subcarriers to the right of the DC subcarrier. In this case, the number of occupied subcarriers to the left and right of the DC subcarrier is the same.

[0263] For case C, assuming that the three subcarriers in the middle of the Q subcarriers are DC subcarriers (i.e., Q1=3), the occupied subcarriers include 39 subcarriers to the left of the DC subcarrier and 38 subcarriers to the right of the DC subcarrier; or, the occupied subcarriers include 38 subcarriers to the left of the DC subcarrier and 39 subcarriers to the right of the DC subcarrier. In this case, the number of occupied subcarriers to the left and right of the DC subcarrier is different. In order to make the number of occupied subcarriers on both sides of the DC subcarrier the same and to reduce processing complexity, an empty subcarrier can be designed. For example, the leftmost subcarrier of the first channel is an empty subcarrier, and among the remaining 79 subcarriers, the three subcarriers in the middle are DC subcarriers (i.e., Q1=3), and the 39 subcarriers to the left of the DC subcarrier and the 38 subcarriers to the right of the DC subcarrier are occupied subcarriers. For example, the rightmost subcarrier of the first channel is an empty subcarrier. Among the remaining 79 subcarriers, the three subcarriers in the middle are DC subcarriers (i.e., Q1=3), and the 39 subcarriers to the left of the DC subcarrier and the 38 subcarriers to the right of the DC subcarrier are occupied subcarriers.

[0264] The following is a further introduction combining scheme a and scheme b.

[0265] (1) Plan a

[0266] According to the description of the three cases above, it can be seen that when the number of DC subcarriers is the same in different cases, the number of occupied subcarriers is different. For example, the number of occupied subcarriers in case A or case B is 78, while the number of occupied subcarriers in case C is 76. Since the number of occupied subcarriers in different cases is different for the same bandwidth, it will lead to higher processing complexity. Therefore, in order to reduce the processing complexity and ensure that the number of occupied subcarriers in different cases is the same, the solution a provided in the embodiment of the present application is:

[0267] When Qmod2 = 1 (i.e., Q is an odd number), Q2 = Q-2-Q1. The Q2 subcarriers (i.e., occupied subcarriers) include the consecutive (Q-2-Q1) / 2 subcarriers to the left of the Q1 subcarrier and the consecutive (Q-2-Q1) / 2 subcarriers to the right of the Q1 subcarrier. The rightmost subcarrier among the consecutive (Q-2-Q1) / 2 subcarriers to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-2-Q1) / 2 subcarriers to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier. The Q3 subcarriers, excluding the Q1 and Q2 subcarriers, are empty subcarriers. Q1 is an odd number, such as an integer such as 1, 3, 5, etc.

[0268] Here, Q3 = Q - Q1 - Q2 = 2, which means there are 2 empty subcarriers among the Q subcarriers. For example, Q3 subcarriers include: the 1st subcarrier and the Qth subcarrier among the Q subcarriers (i.e., 1 on the left, 1 on the right), or the 1st subcarrier and the 2nd subcarrier among the Q subcarriers (i.e., 2 on the left, 0 on the right), or the Q-1th subcarrier and the Qth subcarrier among the Q subcarriers (i.e., 0 on the left, 2 on the right).

[0269] When Qmod2 = 0 (i.e., Q is an even number), Q2 = Q-1-Q1. The Q2 subcarriers (i.e., occupied subcarriers) include the consecutive (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarrier and the consecutive (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarrier. The rightmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier. The Q3 subcarriers, excluding the Q1 and Q2 subcarriers, are empty subcarriers.

[0270] Where Q3 = Q - Q1 - Q2 = 1, which means there is one empty subcarrier among the Q subcarriers. For example, Q3 subcarrier is the first subcarrier (i.e., 1 on the left, 0 on the right) or the Qth subcarrier (i.e., 0 on the left, 1 on the right) among the Q subcarriers.

[0271] For Q1=3, based on Example 1 above, taking the case where the first channel includes two subchannels, that is, the bandwidth of the first channel is 320 MHz, there are three cases for the left guard interval and the right guard interval of the first channel, namely, case A, case B, and case C. In case A or case B, the Q subcarriers in the first channel are 81 subcarriers, and in case C, the Q subcarriers in the first channel are 80 subcarriers. Furthermore, the number of DC subcarriers, the number of occupied subcarriers, and the number of empty subcarriers in case A, case B, and case C are shown in Table 16.

[0272] Table 16: Three situations

[0273]

[0274] According to Table 16, when the bandwidth of the first channel is 320 MHz, the number of DC subcarriers in case A, case B, and case C is the same and an odd number, the number of occupied subcarriers is the same, and the number of occupied subcarriers on both sides of the DC subcarrier is the same, thereby reducing processing complexity.

[0275] For Q1=3, based on Example 1 above, taking the case where the first channel includes 4 subchannels, that is, the bandwidth of the first channel is 640 MHz, there are three cases for the left guard interval and the right guard interval of the first channel, namely, case A, case B, and case C. In case A, case B, or case C, the Q subcarriers in the first channel are 164 subcarriers. Furthermore, the number of DC subcarriers, the number of occupied subcarriers, and the number of empty subcarriers in case A, case B, and case C are shown in Table 17.

[0276] Table 17: Three situations

[0277]

[0278] According to Table 17, when the bandwidth of the first channel is 640 MHz, the number of DC subcarriers in case A, case B, and case C is the same and an odd number, the number of occupied subcarriers is the same, and the number of occupied subcarriers on both sides of the DC subcarrier is the same, thereby reducing processing complexity.

[0279] For Q1=3, based on Example 1 above, taking the case where the first channel includes 8 subchannels, that is, the bandwidth of the first channel is 1280 MHz as an example, there are three cases for the left guard interval and the right guard interval of the first channel, namely, case A, case B, and case C. In case A or case B, the Q subcarriers in the first channel are 331 subcarriers, and in case C, the Q subcarriers in the first channel are 330 subcarriers. Furthermore, the number of DC subcarriers, the number of occupied subcarriers, and the number of empty subcarriers in case A, case B, and case C are shown in Table 18.

[0280] Table 18: Three situations

[0281]

[0282] According to Table 18, when the bandwidth of the first channel is 1280 MHz, the number of DC subcarriers in case A, case B, and case C is the same and an odd number, the number of occupied subcarriers is the same, and the number of occupied subcarriers on both sides of the DC subcarrier is the same, thereby reducing processing complexity.

[0283] (2) Plan b

[0284] Assume that the protocol predefines or preconfigures some of case A, case B, and case C. For example, the protocol predefines or preconfigures case A, case B, or case C. Therefore, there is no need to consider whether the number of occupied subcarriers in different cases is the same. Then, the solution b provided in the embodiment of the present application is:

[0285] When Qmod2=1 (i.e., Q is an odd number), Q2=Q-Q1, and the Q2 subcarriers (i.e., occupied subcarriers) include the continuous (Q-Q1) / 2 subcarriers to the left of the Q1 subcarriers and the continuous (Q-Q1) / 2 subcarriers to the right of the Q1 subcarriers. Among them, the rightmost subcarrier among the continuous (Q-Q1) / 2 subcarriers to the left of the Q1 subcarriers is adjacent to the leftmost subcarrier of the Q1 subcarriers, and the leftmost subcarrier among the continuous (Q-Q1) / 2 subcarriers to the right of the Q1 subcarriers is adjacent to the rightmost subcarrier of the Q1 subcarriers. Among them, Q1 is an odd number, for example, Q1 is an integer such as 1, 3, 5, etc. At this time, since Q and Q1 are both odd numbers, the number of occupied subcarriers on both sides of the DC subcarrier is the same, and there is no need to set empty subcarriers.

[0286] When Qmod2=0 (i.e., Q is an even number), Q2=Q-1-Q1, and the Q2 subcarriers (i.e., occupied subcarriers) include the continuous (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarriers and the continuous (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarriers. Among them, the rightmost subcarrier among the continuous (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarriers is adjacent to the leftmost subcarrier of the Q1 subcarriers, and the leftmost subcarrier among the continuous (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarriers is adjacent to the rightmost subcarrier of the Q1 subcarriers. Among them, Q1 is an odd number, for example, Q1 is an integer such as 1, 3, 5, etc. At this time, since Q is an even number and Q1 is an odd number, an empty subcarrier can be set so that the number of occupied subcarriers on both sides of the DC subcarrier is the same.

[0287] For example, the protocol predefines or preconfigures case A. Based on Example 1 above, taking the first channel including 2 subchannels, that is, the bandwidth of the first channel is 320 MHz as an example, the Q subcarriers in the first channel are 81 subcarriers. When Q1=3, the middle 3 subcarriers of the Q subcarriers are DC subcarriers, and the 39 subcarriers to the left of the DC subcarrier and the 39 subcarriers to the right of the DC subcarrier are occupied subcarriers.

[0288] It is understandable that when the first channel includes more sub-channels, the above can be referred to. In addition, the above takes Q1=3 as an example. When Q1 is other values, the above can be referred to for understanding and will not be listed one by one here.

[0289] Case 2: The number of DFT points of the subchannel in the first frequency band is 256.

[0290] (1) Describe the specific values ​​of the left guard interval and the right guard interval

[0291] Exemplarily, when the bandwidth between the left guard interval and the right guard interval is an integer multiple of the subcarrier spacing of the first channel, there are multiple specific values ​​of the left guard interval and the right guard interval, which are illustrated below with reference to Example 3.

[0292] Example 3

[0293] In Example 3, the sub-channel on the first frequency band is 320 MHz, the sub-carrier spacing is 1.92 MHz, and the first channel includes 2 P subchannels. In addition to the 39*4 subcarriers, the available frequency domain range of the subchannel is 20.48MHz. Therefore, the available frequency domain range on the left side of the subchannel and the available frequency domain range on the right side can include three situations: Situation 1, the available frequency domain range on the left side of the subchannel can be 7.68MHz, and the available frequency domain range on the right side of the subchannel can be 12.8MHz; Situation 2, the available frequency domain range on the left side of the subchannel can be 10.24MHz, and the available frequency domain range on the right side of the subchannel can be 10.24MHz; Situation 3, the available frequency domain range on the left side of the subchannel can be 12.8MHz, and the available frequency domain range on the right side of the subchannel can be 7.68MHz. It can be understood that the embodiments of the present application take these three situations as examples, and there may be other possibilities for the available frequency domain range on the left side of the subchannel and the available frequency domain range on the right side, which are not limited.

[0294] When the first channel includes multiple sub-channels, the multiple sub-channels are numbered 0, 1, 2...2 in order from low to high according to the corresponding frequency. P -1. As a possible implementation, these multiple sub-channels (i.e. sub-channels 0, 1, 2...2 P -1) The available frequency domain range on the left and the available frequency domain range on the right can be designed cyclically according to Case 1, Case 2, and Case 3, as shown in Table 19.

[0295] Table 19: Example of available frequency domain ranges on the left and right of multiple sub-channels

[0296]

[0297] Taking Table 19 as an example, when the first channel includes one or more sub-channels, the left protection interval of the first channel is 7.68 MHz; when Pmod2 = 1, the right protection interval of the first channel is 10.24 MHz, or when Pmod2 = 0, the right protection interval of the first channel is 12.8 MHz, and the details are not repeated here.

[0298] As another possible implementation, the available frequency domain ranges on the left and right of the multiple sub-channels may be designed cyclically according to Case 2, Case 3, and Case 1, as shown in Table 20.

[0299] Table 20: Example of available frequency domain ranges on the left and right of multiple sub-channels

[0300]

[0301] Taking Table 20 as an example, when the first channel includes one or more sub-channels, the left guard interval of the first channel is 10.24 MHz; when Pmod2=1, the right guard interval of the first channel is 7.68 MHz, or when Pmod2=0, the right guard interval of the first channel is 10.24 MHz, and the details are not repeated here.

[0302] As another possible implementation, the available frequency domain ranges on the left and right of the multiple sub-channels may be designed cyclically according to Case 3, Case 1, and Case 2, as shown in Table 21.

[0303] Table 21: Example of available frequency domain ranges on the left and right of multiple sub-channels

[0304]

[0305] Taking Table 21 as an example, when the first channel includes one or more sub-channels, the left guard interval of the first channel is 12.8 MHz; when Pmod2=1, the right guard interval of the first channel is 12.8 MHz, or when Pmod2=0, the right guard interval of the first channel is 7.68 MHz.

[0306] It is understandable that the above example is based on the subcarrier spacing of 1.92 MHz (x=2 N =16)" is described as an example. In an embodiment of the present application, when the subcarrier spacing is other possible values, or the first channel includes other numbers of subchannels, the left guard interval and the right guard interval of the first channel can be processed with reference to the above. That is, the available frequency domain range on the left and the available frequency domain range on the right of the multiple subchannels of the first channel can be as shown in Table 22.

[0307] Table 22: Example of available frequency domain ranges on the left and right of multiple sub-channels

[0308]

[0309] In Table 22, subchannel i may be subchannel 0 among multiple subchannels, or may be subchannel 1 among multiple subchannels, or may be subchannel 2 among multiple subchannels, without specific limitation.

[0310] (2) Describe the Q subcarriers.

[0311] When the first channel includes 1 subchannel, Q=39*4=156, that is, the first channel includes 4 groups of 39 consecutive subcarriers. For example, if the number of DC subcarriers is 1, the 78th subcarrier among the 156 subcarriers is a DC subcarrier, the last subcarrier among the 156 subcarriers is an empty subcarrier, and the subcarriers other than the DC subcarrier and the empty subcarrier are occupied subcarriers; or, the 79th subcarrier among the 156 subcarriers is a DC subcarrier, the first subcarrier among the 156 subcarriers is an empty subcarrier, and the subcarriers other than the DC subcarrier and the empty subcarrier are occupied subcarriers. Here, the number of DC subcarriers is 1 as an example, and the embodiment of the present application does not limit the number of DC subcarriers.

[0312] The first channel includes multiple sub-channels (such as sub-channel 0, sub-channel 1, sub-channel 2...sub-channel 2). P -1), the DC subcarrier and occupied subcarrier of the first channel are introduced.

[0313] The Q subcarriers are ordered from low to high based on frequency, that is, the frequencies of the first subcarrier to the Qth subcarrier are ordered from low to high. The Q subcarriers include Q1 subcarriers, where Q1 subcarrier is a DC subcarrier, Q1 is an integer greater than or equal to 1, and Q1 is less than Q. Some or all of the (Q-Q1) subcarriers in the Q subcarriers other than Q1 subcarrier are occupied subcarriers. For example, if the Q subcarriers also include Q2 subcarriers, Q2 subcarrier is an occupied subcarrier.

[0314] Exemplarily, Q1 subcarriers are one or more subcarriers located in the middle of the Q subcarriers. The embodiment of the present application does not limit the number of DC subcarriers. The DC subcarrier and the occupied subcarrier are described below in conjunction with implementation method 3.

[0315] Implementation 3

[0316] Based on Example 3 above, taking the case where the first channel includes two subchannels, that is, the bandwidth of the first channel is 640 MHz, there are three cases for the left guard interval and right guard interval of the first channel, namely, Case A, Case B, and Case C. Case A: The left guard interval is 7.68 MHz, the right guard interval is 10.24 MHz, and the Q subcarriers in the first channel are 81*4 subcarriers; Case B: The left guard interval is 10.24 MHz, the right guard interval is 7.68 MHz, and the Q subcarriers in the first channel are 81*4 subcarriers; Case C: The left guard interval is 12.8 MHz, the right guard interval is 12.8 MHz, and the Q subcarriers in the first channel are 80*4 subcarriers.

[0317] For case A or case B, assuming that the 9 subcarriers in the middle of the Q subcarriers are DC subcarriers (i.e., Q1=9), in order to make the number of occupied subcarriers on both sides of the DC subcarrier the same to reduce processing complexity, an empty subcarrier can be designed. For example, the leftmost subcarrier of the first channel is an empty subcarrier, and among the remaining 323 subcarriers, the 9 subcarriers in the middle are DC subcarriers (i.e., Q1=9), and the 157 subcarriers to the left of the DC subcarrier and the 157 subcarriers to the right of the DC subcarrier are occupied subcarriers. For another example, the rightmost subcarrier of the first channel is an empty subcarrier, and among the remaining 323 subcarriers, the 9 subcarriers in the middle are DC subcarriers (i.e., Q1=9), and the 157 subcarriers to the left of the DC subcarrier and the 157 subcarriers to the right of the DC subcarrier are occupied subcarriers.

[0318] For case C, assuming that the 9 subcarriers in the middle of the Q subcarriers are DC subcarriers (i.e., Q1=9), in order to make the number of occupied subcarriers on both sides of the DC subcarrier the same to reduce processing complexity, an empty subcarrier can be designed. For example, the leftmost subcarrier of the first channel is an empty subcarrier, and among the remaining 319 subcarriers, the 9 subcarriers in the middle are DC subcarriers (i.e., Q1=9), and the 155 subcarriers to the left of the DC subcarrier and the 155 subcarriers to the right of the DC subcarrier are occupied subcarriers. For another example, the rightmost subcarrier of the first channel is an empty subcarrier, and among the remaining 319 subcarriers, the 9 subcarriers in the middle are DC subcarriers (i.e., Q1=9), and the 155 subcarriers to the left of the DC subcarrier and the 155 subcarriers to the right of the DC subcarrier are occupied subcarriers.

[0319] The following is a further introduction combining scheme a and scheme b.

[0320] (1) Plan a

[0321] According to the description of the three cases above, it can be seen that when the number of DC subcarriers in different cases is the same, the number of occupied subcarriers is different. For example, the number of occupied subcarriers in case A or case B is 314, while the number of occupied subcarriers in case C is 310. Since the number of occupied subcarriers in different cases is different for the same bandwidth, it will lead to higher processing complexity. Therefore, in order to reduce the processing complexity and ensure that the number of occupied subcarriers in different cases is the same, the solution a provided in the embodiment of the present application is:

[0322] Q = Q'*4. When Q'mod2 = 1 (i.e., Q' is an odd number), Q2 = Q-5-Q1. The Q2 subcarriers (i.e., occupied subcarriers) include the consecutive (Q-5-Q1) / 2 subcarriers to the left of the Q1 subcarrier and the consecutive (Q-5-Q1) / 2 subcarriers to the right of the Q1 subcarrier. The rightmost subcarrier among the consecutive (Q-5-Q1) / 2 subcarriers to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-5-Q1) / 2 subcarriers to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier. The Q3 subcarriers, excluding the Q1 and Q2 subcarriers, are empty subcarriers. Q1 is an odd number, such as an integer such as 1, 3, 5, etc.

[0323] Among them, Q3 = Q-Q1-Q2 = 5, that is, there are 5 empty subcarriers among the Q subcarriers. For example, Q3 subcarriers include:

[0324] The 1st to 5th subcarriers among the Q subcarriers (i.e., 5 on the left and 0 on the right); or,

[0325] The 1st to 4th subcarriers, and the Qth subcarrier among the Q subcarriers (i.e., 4 on the left and 1 on the right); or,

[0326] The 1st to 3rd subcarriers, and the Q-1th and Qth subcarriers among the Q subcarriers (i.e., 3 on the left and 2 on the right); or,

[0327] The 1st subcarrier to the 2nd subcarrier, and the Q-2th subcarrier to the Qth subcarrier (i.e., 2 on the left and 3 on the right) among the Q subcarriers; or

[0328] The 1st subcarrier among the Q subcarriers, and the Q-3th subcarrier to the Qth subcarrier (i.e., 1 on the left and 4 on the right); or,

[0329] The Q-4th subcarrier to the Qth subcarrier among the Q subcarriers (ie, 0 on the left and 5 on the right).

[0330] Q = Q'*4. When Q'mod2 = 0 (i.e., Q' is an even number), Q2 = Q-1-Q1. The Q2 subcarriers (i.e., occupied subcarriers) include the consecutive (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarrier and the consecutive (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarrier. The rightmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier. Among the Q subcarriers, Q3 subcarriers, excluding Q1 and Q2, are empty subcarriers.

[0331] Wherein, Q3=Q-Q1-Q2=1, that is, there is one empty subcarrier among the Q subcarriers. For example, the one empty subcarrier may be the first subcarrier among the Q subcarriers, or may be the Qth subcarrier among the Q subcarriers.

[0332] For Q1=9, based on Example 3 above, taking the case where the first channel includes 2 subchannels, that is, the bandwidth of the first channel is 640 MHz as an example, there are three cases for the left guard interval and the right guard interval of the first channel, namely, case A, case B, and case C. Specifically, for case A or case B, the Q subcarriers in the first channel are 81*4 subcarriers, and for case C, the Q subcarriers in the first channel are 80*4 subcarriers. Furthermore, the number of DC subcarriers, the number of occupied subcarriers, and the number of empty subcarriers in case A, case B, and case C are shown in Table 23.

[0333] Table 23: Three cases

[0334]

[0335]

[0336] According to Table 23, when the bandwidth of the first channel is 640 MHz, the number of DC subcarriers in case A, case B, and case C is the same and an odd number, the number of occupied subcarriers is the same, and the number of occupied subcarriers on both sides of the DC subcarrier is the same, thereby reducing processing complexity.

[0337] For Q1=9, based on Example 3 above, taking the case where the first channel includes 4 subchannels, that is, the bandwidth of the first channel is 1280 MHz as an example, there are three cases for the left guard interval and the right guard interval of the first channel, namely, case A, case B, and case C. In case A, case B, or case C, the Q subcarriers in the first channel are 164*4 subcarriers. Furthermore, the number of DC subcarriers, the number of occupied subcarriers, and the number of empty subcarriers in case A, case B, and case C are shown in Table 24.

[0338] Table 24: Three cases

[0339]

[0340] According to Table 24, when the bandwidth of the first channel is 1280 MHz, the number of DC subcarriers in case A, case B, and case C is the same and an odd number, the number of occupied subcarriers is the same, and the number of occupied subcarriers on both sides of the DC subcarrier is the same, thereby reducing processing complexity.

[0341] For Q1=9, based on Example 3 above, taking the case where the first channel includes 8 subchannels, that is, the bandwidth of the first channel is 2560 MHz as an example, there are three cases for the left guard interval and the right guard interval of the first channel, namely, case A, case B, and case C. Specifically, for case A or case B, the Q subcarriers in the first channel are 331*4 subcarriers, and for case C, the Q subcarriers in the first channel are 330*4 subcarriers. Furthermore, the number of DC subcarriers, the number of occupied subcarriers, and the number of empty subcarriers in case A, case B, and case C are shown in Table 25.

[0342] Table 25: Three situations

[0343]

[0344]

[0345] According to Table 25, when the bandwidth of the first channel is 2560 MHz, the number of DC subcarriers in case A, case B, and case C is the same and an odd number, the number of occupied subcarriers is the same, and the number of occupied subcarriers on both sides of the DC subcarrier is the same, thereby reducing processing complexity.

[0346] (2) Plan b

[0347] Assume that the protocol predefines or preconfigures some of case A, case B, and case C. For example, the protocol predefines or preconfigures case A, case B, or case C. Therefore, there is no need to consider whether the number of occupied subcarriers in different cases is the same. Then, the solution b provided in the embodiment of the present application is:

[0348] Since Q=Q'*4, that is, Q is an even number, Q2=Q-1-Q1, and the Q2 subcarriers (i.e., occupied subcarriers) include the continuous (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarriers and the continuous (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarriers. Among them, the rightmost subcarrier among the continuous (Q-1-Q1) / 2 subcarriers to the left of the Q1 subcarriers is adjacent to the leftmost subcarrier of the Q1 subcarriers, and the leftmost subcarrier among the continuous (Q-1-Q1) / 2 subcarriers to the right of the Q1 subcarriers is adjacent to the rightmost subcarrier of the Q1 subcarriers. Among them, Q1 is an odd number, for example, Q1 is an integer such as 1, 3, 5... At this time, since Q is an even number and Q1 is an odd number, an empty subcarrier can be set so that the number of occupied subcarriers on both sides of the DC subcarrier is the same.

[0349] For example, the protocol predefines or preconfigures case A. Based on Example 3 above, taking the first channel including 2 subchannels, that is, the bandwidth of the first channel is 640 MHz as an example, the Q subcarriers in the first channel are 81 subcarriers. When Q1=9, the middle 9 subcarriers of the Q subcarriers are DC subcarriers, the leftmost or rightmost subcarrier of the Q subcarriers is an empty subcarrier, and the 157 subcarriers to the left of the DC subcarrier and the 157 subcarriers to the right of the DC subcarrier are occupied subcarriers.

[0350] It is understandable that when the first channel includes more sub-channels, the above can be referred to. In addition, the above is based on Q1=9 as an example. When Q1 is other values, the above can be referred to for understanding and will not be listed here one by one.

[0351] It is understandable that:

[0352] (1) In the embodiments of the present application, "occupied subcarriers" refer to subcarriers that can be occupied, and whether they are actually occupied (for example, whether data or pilots are sent on the occupied subcarriers) depends on the specific implementation of the first communication device. For example, the 310 occupied subcarriers shown in Table 23, in specific implementation, the first communication device can occupy these 310 subcarriers (that is, send data and / or pilots on the 310 subcarriers), or it can occupy part of the 310 subcarriers (that is, send data and / or pilots on part of the 310 subcarriers, and the other part of the subcarriers are unused subcarriers). In the embodiments of the present application, "empty subcarriers" refer to subcarriers that cannot be occupied.

[0353] “Occupied subcarrier” may also be replaced by other possible names, such as available subcarrier; and “empty subcarrier” may also be replaced by other possible names, such as unavailable subcarrier or forbidden subcarrier.

[0354] (2) Similar to the description of the first channel in Example 2, in the embodiment of the present application, the second channel may also include a left guard interval, a right guard interval, and Q subcarriers located between the left guard interval and the right guard interval. The bandwidth between the left guard interval and the right guard interval is Q times the subcarrier spacing of the second channel. The left guard interval and the right guard interval of the second channel may refer to the description of the left guard interval and the right guard interval of the first channel. For example, the frequency domain range available on the left and the frequency domain range available on the right of the multiple subchannels of the second channel may be as shown in Table 12 (x=1). The Q subcarriers of the second channel may also refer to the description of the Q subcarriers of the first channel in Example 2.

[0355] (3) In the above-mentioned embodiment 1 and embodiment 2, the P or 2 N ” (i.e., the exponent of 2) is used as an example for description, and the present application embodiment does not limit this, i.e., “2 P or 2 N " can also be replaced by any other possible value. That is, it is not limited to the first channel including 2 P sub-channels, the first channel may also include 3 sub-channels, or 5 sub-channels, or 6 sub-channels, or 7 sub-channels, etc.; and the sub-carrier spacing of the first channel is not limited to 2 N *480 kHz. The subcarrier spacing of the first channel may also be other values ​​greater than 480 kHz. Other similarities may be referred to.

[0356] (4) In the various embodiments of this application, unless otherwise specified or logically conflicting, the terms and / or descriptions between different embodiments are consistent and may be referenced to each other. The technical features of different embodiments may be combined to form new embodiments based on their inherent logical relationships. In addition, within the same embodiment, different implementations or different examples may also reference or refer to each other.

[0357] (5) The various numerical numbers involved in this application are only for the convenience of description and are not intended to limit the scope of this application. The step numbers in the above flowcharts are only examples of the execution process and do not constitute a restriction on the order of execution of the steps. That is, the size of the step numbers does not mean the order of execution. The execution order of each step should be determined by its function and internal logic. In addition, not all the steps shown in the flowcharts are required to be executed. Some steps can be added or deleted based on actual needs.

[0358] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the interaction between the first communication device and the second communication device. It is understandable that in order to implement the above functions, the first communication device and the second communication device may include hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0359] In the embodiments of the present application, the first communication device and the second communication device may be divided into functional units according to the above method examples. For example, the functional units may be divided into corresponding functional units, or two or more functions may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or software functional units.

[0360] In the case of an integrated unit, Figure 10 A possible exemplary block diagram of the device involved in the embodiments of the present application is shown. Figure 10As shown, apparatus 1000 may include a processing unit 1002 and a communication unit 1003. Processing unit 1002 is used to control and manage the operations of apparatus 1000. Communication unit 1003 is used to support communication between apparatus 1000 and other devices. Communication unit 1003, also known as a transceiver unit, may include a receiving unit and / or a transmitting unit, each configured to perform receiving and transmitting operations. Optionally, apparatus 1000 also includes a storage unit 1001 for storing program code and / or data of apparatus 1000.

[0361] (1) The apparatus 1000 may be the first communication apparatus in the aforementioned embodiment. The processing unit 1002 may support the apparatus 1000 in executing the actions of the first communication apparatus in each of the aforementioned method examples. Alternatively, the processing unit 1002 may primarily execute the internal actions of the first communication apparatus in the method examples, and the communication unit 1003 may support communication between the apparatus 1000 and other devices.

[0362] In one embodiment, the processing unit 1002 is configured to generate one or more OFDM symbols in a radio frame; the communication unit 1003 is configured to transmit the one or more OFDM symbols on a first channel in a first frequency band; wherein the subcarrier spacing of the first channel is 2 times the subcarrier spacing of the second channel in the second frequency band. N times, the subcarrier spacing of the second channel is 480 kHz KHz, the lowest frequency of the first frequency band is higher than the highest frequency of the second frequency band; the bandwidth of the second channel is 2 P *20 MHz, the bandwidth of the first channel is 2 N *2 P *20MHZ, N is an integer greater than 0, and P is an integer greater than or equal to 0.

[0363] (2) The apparatus 1000 may be the second communication apparatus in the aforementioned embodiments. The processing unit 1002 may support the apparatus 1000 in executing the actions of the second communication apparatus in each of the aforementioned method examples. Alternatively, the processing unit 1002 may primarily execute the internal actions of the second communication apparatus in the method examples, and the communication unit 1003 may support communication between the apparatus 1000 and other devices.

[0364] In one embodiment, the communication unit 1003 is configured to receive one or more OFDM symbols in a radio frame on a first channel in a first frequency band; the processing unit 1002 is configured to process the one or more OFDM symbols; wherein the subcarrier spacing of the first channel is 2 subcarrier spacing of the second channel in the second frequency band. N times, the subcarrier spacing of the second channel is 480 kHz KHz, the lowest frequency of the first channel is higher than the highest frequency of the second channel; the bandwidth of the second channel is 2 P*20 MHz, the bandwidth of the first channel is 2 N *2 P *20MHZ; N is an integer greater than 0, and P is an integer greater than or equal to 0.

[0365] It should be understood that the division of units in the above device is merely a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. Moreover, the units in the device can all be implemented in the form of software calling through processing elements; or they can all be implemented in the form of hardware; or some units can be implemented in the form of software calling through processing elements, and some units can be implemented in the form of hardware. For example, each unit can be a separately established processing element, or it can be integrated into a certain chip of the device. In addition, it can also be stored in the memory in the form of a program, called by a certain processing element of the device and execute the function of the unit. In addition, all or part of these units can be integrated together, or they can be implemented independently. The processing element described here can also be a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each operation of the above method or each unit above can be implemented by the integrated logic circuit of the hardware in the processor element or in the form of software calling through the processing element.

[0366] In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, such as one or more application specific integrated circuits (ASICs), one or more digital single processors (DSPs), one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms. For another example, when the unit in the device can be implemented in the form of a processing element scheduler, the processing element can be a processor, such as a general-purpose central processing unit (CPU), or other processor that can call a program. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC). The above unit for receiving is an interface circuit of the device, which is used to receive signals from other devices. For example, when the device is implemented in the form of a chip, the receiving unit is the interface circuit of the chip used to receive signals from other chips or devices. The above unit for sending is an interface circuit of the device, which is used to send signals to other devices. For example, when the device is implemented in a chip, the sending unit is an interface circuit of the chip used to send signals to other chips or devices.

[0367] Based on the same technical concept, the embodiment of the present application also provides a communication device, which is used to implement the functions of the first communication device or the second communication device in the above embodiment. Figure 11 As shown, the apparatus may be a communication device or a chip in a communication device. The apparatus includes a processor 1101 and a communication interface 1102 , and optionally, further includes a memory 1103 . Figure 11 Only the main components of the communication device are shown. In addition to the processor 1101 and the communication interface 1102, the communication device may further include a memory 1103 and an input and output device (not shown).

[0368] The processor 1101 is used to execute the program code stored in the memory 1103, specifically to execute the actions of the processing unit 1002, which will not be described in detail in this application. The communication interface 1102 is specifically used to execute the actions of the communication unit 1003, which will not be described in detail in this application.

[0369] Processor 1101 can be a CPU, a digital processing unit, or the like. Processor 1101 can be used to process communication protocols and communication data, control the entire communication device, execute software programs, and process software program data, such as, but not limited to, baseband-related processing. Communication interface 1102 can be used to transmit and receive signals, such as, but not limited to, radio frequency transmission and reception. The aforementioned components can be provided on separate chips, or at least partially or entirely on the same chip. For example, processor 1101 can be further divided into an analog baseband processor and a digital baseband processor. The analog baseband processor can be integrated with the transceiver on the same chip, while the digital baseband processor can be provided on a separate chip. With the continuous advancement of integrated circuit technology, more and more components can be integrated on the same chip. For example, a digital baseband processor can be integrated with multiple application processors (such as, but not limited to, a graphics processor, a multimedia processor, etc.) on the same chip. Such a chip is referred to as a system-on-chip. Whether to independently provide each component on different chips or integrate them on one or more chips often depends on the specific needs of the product design. The embodiments of the present invention do not limit the specific implementation of the above-mentioned devices.

[0370] Communication interface 1102 may be a transceiver, an interface circuit such as a transceiver circuit, or a transceiver chip. Optionally, communication interface 1102 may include a radio frequency circuit and an antenna. The radio frequency circuit is primarily used for converting baseband signals into radio frequency signals and processing radio frequency signals. The antenna is primarily used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. Input / output devices, such as a touch screen, display, and keyboard, are primarily used for receiving user input and outputting data to the user.

[0371] Memory 1103 is used to store programs executed by processor 1101. Memory 1103 can be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory, such as random-access memory (RAM). Memory 1103 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0372] When the communication device is powered on, the processor 1101 can read the software program in the memory 1103, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 1101 performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1101. The processor 1101 converts the baseband signal into data and processes the data.

[0373] In another implementation, the RF circuit and antenna may be provided independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be remotely arranged independent of the communication device.

[0374] The specific connection medium between the communication interface 1102, the processor 1101 and the memory 1103 is not limited in the embodiment of the present application. Figure 11 The memory 1103, the processor 1101 and the communication interface 1102 are connected via a bus 1104. Figure 11 The connections between the other components are shown in bold lines, which are only for illustration and not intended to be limiting. The bus can be divided into address bus, data bus, control bus, etc. Figure 11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0375] Optionally, the communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0376] (1) An independent integrated circuit (IC), chip, or chip system or subsystem;

[0377] (2) A set of one or more ICs, optionally including a storage component for storing data and instructions;

[0378] (3) Application specific integrated circuit (ASIC), such as a modem;

[0379] (4) Modules that can be embedded in other devices;

[0380] (5) Receivers, smart terminals, wireless devices, handheld devices, mobile units, vehicle-mounted devices, cloud devices, artificial intelligence devices, etc.;

[0381] (6)Others, etc.

[0382] The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "Multiple" refers to two or more, and "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: the situation where A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or its similar expressions refers to any combination of these items, including any combination of single or plural items. For example, "at least one of A, B or C" includes A, B, C, AB, AC, BC or ABC, and "at least one of A, B and C" can also be understood to include A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the order, timing, priority or importance of multiple objects.

[0383] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, optical storage, etc.) that contain computer-usable program code.

[0384] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0385] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0386] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

Claims

1. A communication method, characterized in that: The method is applied to a first communication device, and the method includes: generating one or more orthogonal frequency division multiplexing (OFDM) symbols in a radio frame; transmitting the one or more OFDM symbols on a first channel in a first frequency band; The subcarrier spacing of the first channel is 2 times the subcarrier spacing of the second channel in the second frequency band. N times, the subcarrier spacing of the second channel is 480 kHz, and the lowest frequency of the first frequency band is higher than the highest frequency of the second frequency band; The bandwidth of the second channel is 2 P *20 MHz, the bandwidth of the first channel is 2 N *2 P *20MHZ, N is an integer greater than 0, and P is an integer greater than or equal to 0.

2. A communication method, characterized in that: The method is applied to a second communication device, and the method includes: receiving one or more OFDM symbols in a radio frame on a first channel in a first frequency band; processing the one or more OFDM symbols; The subcarrier spacing of the first channel is 2 times the subcarrier spacing of the second channel in the second frequency band. N times, the subcarrier spacing of the second channel is 480 kHz, and the lowest frequency of the first frequency band is higher than the highest frequency of the second frequency band; The bandwidth of the second channel is 2 P *20 MHz, the bandwidth of the first channel is 2 N *2 P *20MHZ, N is an integer greater than 0, and P is an integer greater than or equal to 0.

3. The method according to claim 1 or 2, characterized in that The number of discrete Fourier transform DFT points corresponding to the bandwidth of the first channel is 2 P *64.

4. The method according to claim 3, characterized in that The subcarrier spacing of the first channel is 3.84 MHz, and the bandwidth of the first channel and the number of DFT points corresponding to the first channel satisfy any one of the following: The bandwidth of the first channel is 160 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 64; The bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 128; The bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256; The bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512; The bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024.

5. The method according to claim 3, characterized in that The subcarrier spacing of the first channel is 1.92 MHz, and the bandwidth of the first channel and the number of DFT points corresponding to the bandwidth of the first channel satisfy any one of the following: The bandwidth of the first channel is 80 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 64; The bandwidth of the first channel is 160 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 128; The bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256; The bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512; The bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024; The bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 2048.

6. The method according to claim 1 or 2, characterized in that The number of discrete Fourier transform DFT points corresponding to the bandwidth of the first channel is 2 P *256.

7. The method according to claim 6, characterized in that The subcarrier spacing of the first channel is 1.92 MHz, and the bandwidth of the first channel and the number of DFT points corresponding to the first channel satisfy any one of the following: The bandwidth of the first channel is 320 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 256; The bandwidth of the first channel is 640 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 512; The bandwidth of the first channel is 1280 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 1024; The bandwidth of the first channel is 2560 MHz, and the number of DFT points corresponding to the bandwidth of the first channel is 2048.

8. The method according to claim 1 or 2, characterized in that The first channel includes a left guard interval, a right guard interval, and Q subcarriers located between the left guard interval and the right guard interval, where Q is an integer greater than 1; The bandwidth between the left guard interval and the right guard interval is Q times the subcarrier spacing of the first channel.

9. The method according to claim 8, characterized in that The number of discrete Fourier transform DFT points corresponding to the bandwidth of the first channel is 2 P *64, the subcarrier spacing of the first channel is 3.84 MHz; The left guard interval is 3.84 MHz; when Pmod2=1, the right guard interval is 5.12 MHz, or when Pmod2=0, the right guard interval is 6.4 MHz; or, The left guard interval is 5.12 MHz; when Pmod2=1, the right guard interval is 3.84 MHz, or when Pmod2=0, the right guard interval is 5.12 MHz; or, The left guard interval is 6.4 MHz; when Pmod2=1, the right guard interval is 6.4 MHz, or when Pmod2=0, the right guard interval is 3.84 MHz; Among them, mod represents the remainder operation.

10. The method according to claim 8, characterized in that The number of discrete Fourier transform DFT points corresponding to the bandwidth of the first channel is 2 P *64, the subcarrier spacing of the first channel is 1.92 MHz; The left guard interval is 1.92 MHz; when Pmod2=1, the right guard interval is 2.56 MHz, or when Pmod2=0, the right guard interval is 3.2 MHz; or, The left guard interval is 2.56 MHz; when Pmod2=1, the right guard interval is 1.92 MHz, or when Pmod2=0, the right guard interval is 2.56 MHz; or, The left guard interval is 3.2 MHz; when Pmod2=1, the right guard interval is 3.2 MHz, or when Pmod2=0, the right guard interval is 1.92 MHz; Among them, mod represents the remainder operation.

11. The method according to claim 9 or 10, characterized in that The Q subcarriers are sorted from low to high based on frequency, the Q subcarriers include Q1 subcarriers and Q2 subcarriers, the Q1 subcarrier is a DC subcarrier, the Q2 subcarrier is an occupied subcarrier, the occupied subcarriers include data subcarriers and / or pilot subcarriers, Q1 is an odd number greater than or equal to 1, Q2 is an integer greater than or equal to 1, Q1 is less than Q, and Q2 is less than Q.

12. The method according to claim 11, characterized in that: When Qmod2=1, the Q2 subcarriers include consecutive (Q-2-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and consecutive (Q-2-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier of the consecutive (Q-2-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier of the consecutive (Q-2-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; When Qmod2=0, the Q2 subcarriers include consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier of the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier of the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; Among the Q subcarriers, Q3 subcarriers other than the Q1 subcarriers and the Q2 subcarriers are empty subcarriers; when Qmod2=1, Q3=2, and when Qmod2=1, Q3=1; mod represents a modulo operation.

13. The method according to claim 11, wherein: When Qmod2=1, the Q2 subcarriers include consecutive (Q-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and consecutive (Q-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier of the consecutive (Q-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier of the consecutive (Q-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; When Qmod2=0, the Q2 subcarriers include consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; one subcarrier among the Q subcarriers other than the Q1 subcarrier and the Q2 subcarrier is a null subcarrier; Among them, mod represents the remainder operation.

14. The method according to claim 8, characterized in that The number of discrete Fourier transform DFT points corresponding to the bandwidth of the first channel is 2 P *256, the subcarrier spacing of the first channel is 1.92 MHz; The left guard interval is 7.68 MHz; when Pmod2=1, the right guard interval is 10.24 MHz, or when Pmod2=0, the right guard interval is 12.8 MHz; or, The left guard interval is 10.24 MHz; when Pmod2=1, the right guard interval is 7.68 MHz, or when Pmod2=0, the right guard interval is 10.24 MHz; or, The left guard interval is 12.8 MHz; when Pmod2=1, the right guard interval is 12.8 MHz, or when Pmod2=0, the right guard interval is 7.68 MHz.

15. The method according to claim 14, characterized in that The Q subcarriers are sorted from low to high based on frequency, the Q subcarriers include Q1 subcarriers and Q2 subcarriers, the Q1 subcarrier is a DC subcarrier, the Q2 subcarrier is an occupied subcarrier, the occupied subcarriers include data subcarriers and / or pilot subcarriers, Q1 is an odd number greater than or equal to 1, Q2 is an integer greater than or equal to 1, Q1 is less than Q, and Q2 is less than Q.

16. The method according to claim 15, characterized in that Q=Q'*4, where Q' is an integer greater than or equal to 1; When Q'mod2=1, Q2=Q-5-Q1, and the Q2 subcarriers include the consecutive (Q-5-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and the consecutive (Q-5-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier among the consecutive (Q-5-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-5-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; When Q'mod2=0, Q2=Q-1-Q1, and the Q2 subcarriers include the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; Among the Q subcarriers, Q3 subcarriers other than the Q1 subcarriers and the Q2 subcarriers are empty subcarriers; when Q'mod2=1, Q3=5, and when Q'mod2=0, Q3=1; mod represents a modulo operation.

17. The method according to claim 15, characterized in that Q=Q'*4, where Q' is an integer greater than or equal to 1; The Q2 subcarriers include consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier and consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier; wherein, the rightmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the left of the Q1 subcarrier is adjacent to the leftmost subcarrier of the Q1 subcarrier, and the leftmost subcarrier among the consecutive (Q-1-Q1) / 2 subcarriers located to the right of the Q1 subcarrier is adjacent to the rightmost subcarrier of the Q1 subcarrier; Among the Q subcarriers, Q3 subcarriers other than the Q1 subcarriers and the Q2 subcarriers are empty subcarriers, and Q3=1.

18. A communication device, characterized in that: Comprising means for performing the method according to any one of claims 1 to 17.

19. A communication device, characterized in that: The method comprises a processor coupled to a memory, wherein a computer program is stored in the memory; the processor is used to call part or all of the computer program in the memory so that the method according to any one of claims 1 to 17 is executed.

20. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when part or all of the computer program is executed by a computer, the method according to any one of claims 1 to 17 is executed.

21. A computer program product, characterized in that When a computer reads and executes the computer program product, the method according to any one of claims 1 to 17 is performed.

Images