Communication method and apparatus

Abstract

A communication method and apparatus, which relate to the technical field of communications, and can enable a resource unit (RU) to increase system throughput while amplifying power to the greatest extent. The method comprises: transmitting an orthogonal frequency division multiplexing (OFDM) symbol by means of a first resource unit, the first resource unit comprising 17 groups of sub-carriers and one single sub-carrier, and each group of sub-carriers comprising a first sub-carrier, a second sub-carrier, and a third sub-carrier arranged according to a frequency domain sequence; the first sub-carrier and the second sub-carrier are discrete, and the second sub-carrier and the third sub-carrier are continuous; or the first sub-carrier and the second sub-carrier are continuous, and the second sub-carrier and the third sub-carrier are discrete. The method and apparatus are applicable to wireless local area networks (WLANs) that support Institute of Electrical and Electronics Engineers (IEEE)-related standards, including: the 802.11a / b / g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, 802.11be standard, 802.11bn standard / UHR standard / Wi-Fi 8 standard, 802.11ad standard, 802.11ay standard, 802.11bf standard / sensing standard, UWB standard / 802.15 standard, etc.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 16, 2023, with application number 202311535526.5 and application name “Communication Method and Device”, as well as the Chinese patent application filed with the State Intellectual Property Office on December 12, 2023, with application number 202311710628.6 and application name “Communication Method and Device”, and the Chinese patent application filed with the State Intellectual Property Office on January 12, 2024, with application number 202410053907.8 and application name “Communication Method and Device”, all 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 and device. Background Art

[0003] In a communication system, communication devices can communicate with each other via resource units (RUs). However, due to the limitations of maximum power and maximum power spectrum density, the design of existing RUs still has room for further power amplification.

[0004] Therefore, how to design RU to maximize power and improve system throughput has become a technical problem that needs to be solved urgently.

[0005] Summary of the Invention

[0006] The present application provides a communication method and apparatus that can maximize the power of an RU while improving system throughput.

[0007] In the first aspect, the present application provides a communication method, which can be performed by a first communication device. Unless otherwise specified, the "first communication device" in the present application can refer to the first communication device itself, or a component in the first communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the first communication device. The method includes: transmitting orthogonal frequency division multiplexing OFDM symbols through a first resource unit; wherein the first resource unit includes 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers includes a first subcarrier, a second subcarrier and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete.

[0008] Based on the first aspect, a first resource unit designed based on distributed RU technology is provided, which can discretize the limited number of subcarriers into a wider bandwidth to maximize the transmission power (that is, to obtain a better power amplification effect), that is, the above-mentioned first resource unit can achieve a larger power amplification factor. At the same time, the first resource unit can include two consecutive subcarriers, which is convenient for smoothing the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0009] In one possible design, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers spaced between the first subcarrier and the second subcarrier is greater than or equal to 3; or, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers spaced between the second subcarrier and the third subcarrier is greater than or equal to 3.

[0010] Based on this possible design, the number of subcarriers spaced between two discrete subcarriers may be greater than or equal to 3, so as to determine more first resource units in the 20 MHz bandwidth as evenly as possible.

[0011] In one possible design, 20MHz includes 4 first resource units; the first subcarriers in the nth group of subcarriers of the 4 first resource units are continuous, and / or, the second subcarrier and the third subcarrier in the nth group of subcarriers of the 4 first resource units are continuous, n = 1, 2,…, 17.

[0012] In one possible design, 20MHz includes 4 first resource units; the first subcarrier and the second subcarrier in the nth group of subcarriers of the 4 first resource units are continuous, and / or, the third subcarrier in the nth group of subcarriers of the 4 first resource units are continuous, n = 1, 2,…, 17.

[0013] Based on the above two possible designs, the above four first resource units can be determined as evenly as possible in the 20 MHz bandwidth.

[0014] In one possible design, the indices of the subcarriers included in the first resource unit are: -122, -118, -117, -108, -104, -103, -94, -90, -89, -80, -76, -75, -66, -62, -61, -52, -48, -47, -38, -34, -33, -25, -21, -20, -12, -8, -7, 9, 13, 14, 22, 26, 27, 36, 40, 41, 50, 54, 55, 64, 68, 69, 78, 82, 83, 92, 96, 97, 106, 110, 111, and 119.

[0015] In one possible design, the indices of the subcarriers included in the first resource unit are: -121, -116, -115, -107, -102, -101, -93, -88, -87, -79, -74, -73, -65, -60, -59, -51, -46, -45, -37, -32, -31, -24, -19, -18, -11, -6, -5, 10, 15, 16, 23, 28, 29, 37, 42, 43, 51, 56, 57, 65, 70, 71, 79, 84, 85, 93, 98, 99, 107, 112, 113, 120.

[0016] In one possible design, the indices of the subcarriers included in the first resource unit are: -120, -114, -113, -106, -100, -99, -92, -86, -85, -78, -72, -71, -64, -58, -57, -50, -44, -43, -36, -30, -29, -23, -17, -16, -10, -4, -3, 11, 17, 18, 24, 30, 31, 38, 44, 45, 52, 58, 59, 66, 72, 73, 80, 86, 87, 94, 100, 101, 108, 114, 115, 121.

[0017] In one possible design, the indices of the subcarriers included in the first resource unit are: -119, -112, -111, -105, -98, -97, -91, -84, -83, -77, -70, -69, -63, -56, -55, -49, -42, -41, -35, -28, -27, -22, -15, -14, -9, -2, 2, 12, 19, 20, 25, 32, 33, 39, 46, 47, 53, 60, 61, 67, 74, 75, 81, 88, 89, 95, 102, 103, 109, 116, 117, 122.

[0018] Based on the above four possible designs, multiple feasible solutions are provided for the design of the first resource unit.

[0019] In one possible design, the subcarriers included in the first resource unit are the same as the subcarriers included in the two second resource units, and the second resource unit includes the odd-numbered subcarriers in the first resource unit; or, the second resource unit includes the even-numbered subcarriers in the first resource unit.

[0020] In one possible design, the subcarriers included in the first resource unit are a subset of the subcarriers included in the third resource unit, and the third resource unit includes 2 first resource units and 2 single subcarriers.

[0021] In one possible design, the third resource unit includes the first first resource unit, the third first resource unit, a single subcarrier indexed as 3, and a single subcarrier indexed as 5; or, the third resource unit includes the second first resource unit, the fourth first resource unit, a single subcarrier indexed as 4, and a single subcarrier indexed as 6.

[0022] Based on the above three possible designs, the second resource unit and the third resource unit can also be determined according to the first resource unit, providing multiple feasible solutions for the design of resource units.

[0023] In one possible design, the first resource unit includes 4 discrete pilot subcarriers; when the second subcarrier and the third subcarrier are continuous, the 4 discrete pilot subcarriers are 4 discrete subcarriers among the 17 second subcarriers and the 17 third subcarriers; or, when the first subcarrier and the second subcarrier are continuous, the 4 discrete pilot subcarriers are 4 discrete subcarriers among the 17 first subcarriers and the 17 second subcarriers.

[0024] Based on this possible design, by determining the pilot subcarrier as one of two consecutive subcarriers, the combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier. During the channel estimation process, the channel estimation can be made more accurate, thereby improving the phase deviation estimation accuracy and reducing the packet error rate.

[0025] In one possible design, 20MHz includes 4 first resource units; when the second subcarrier and the third subcarrier are continuous, one subcarrier among the 4 second subcarriers and 4 third subcarriers corresponding to the mth group of subcarriers arranged in frequency domain order in the 4 first resource units is a pilot subcarrier, and m = 1, 2, ..., 7, 8, 10, 11, ..., 17.

[0026] In one possible design, 20MHz includes 4 first resource units; when the first subcarrier and the second subcarrier are continuous, one subcarrier among the 4 first subcarriers and 4 second subcarriers corresponding to the mth group of subcarriers arranged in frequency domain order in the 4 first resource units is a pilot subcarrier, and m = 1, 2, ..., 7, 8, 10, 11, ..., 17.

[0027] Based on the above two possible designs, each first resource unit contains 17 groups of paired subcarriers (i.e., continuous subcarriers). For the four first resource units in 20MHz, the nth group of paired subcarriers is continuous, that is, the nth group of paired subcarriers of the first resource unit 1, the nth group of paired subcarriers of the first resource unit 2, the nth group of paired subcarriers of the first resource unit 3, and the nth group of paired subcarriers of the first resource unit 4 are 8 continuous subcarriers. These 8 continuous subcarriers are called a block, and there are 17 blocks in total. One pilot subcarrier can be set in each of the 1st to 8th blocks and the 10th to 17th blocks, for a total of 16 pilot subcarriers. Since the 9th block is located on both sides of the DC subcarrier and is easily affected by carrier leakage, no pilot subcarrier is set. These 16 pilot subcarriers can be allocated to the 4 first resource units, and each first resource unit includes 4 pilot subcarriers. By setting a pilot subcarrier in each block, it is possible to avoid the pilot subcarriers of the same / different first resource units being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase offset estimation.

[0028] In one possible design, the four pilot subcarriers included in the first resource unit are respectively located in the 1st, 5th, 10th and 14th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the first resource unit are respectively located in the 2nd, 6th, 11th and 15th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the first resource unit are respectively located in the 3rd, 7th, 12th and 16th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the first resource unit are respectively located in the 4th, 8th, 13th and 17th groups of subcarriers arranged in frequency domain order.

[0029] Based on this possible design, the pilot subcarriers can be distributed more evenly, avoiding the pilot subcarriers of the first resource unit being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0030] In one possible design, the two pilot subcarriers in the first resource unit are odd-numbered subcarriers of the first resource unit, and the other two pilot subcarriers are even-numbered subcarriers of the first resource unit.

[0031] Based on this possible design, when two second resource units are determined based on the first resource unit, it can be ensured that each second resource unit can include two pilot subcarriers. That is, the pilot subcarriers included in the first resource unit are the same as the pilot subcarriers included in the two second resource units, the pilot subcarriers included in the second resource unit are the two pilot subcarriers with odd sorting numbers among the subcarriers of the first resource unit, and the second resource unit is determined based on the odd-numbered subcarriers in the first resource unit; or, the pilot subcarriers included in the second resource unit are the two pilot subcarriers with even sorting numbers among the subcarriers of the first resource unit, and the second resource unit is determined based on the even-numbered subcarriers in the first resource unit.

[0032] In one possible design, the indexes of the pilot subcarriers included in the first resource unit are: -112, -56, 19, 74; or, the indexes of the pilot subcarriers included in the first resource unit are: -112, -55, 20, 74; or, the indexes of the pilot subcarriers included in the first resource unit are: -112, -55, 19, 75; or, the indexes of the pilot subcarriers included in the first resource unit are: -111, -56, 20, 74; or, the indexes of the pilot subcarriers included in the first resource unit are: -111, -56, 19, 75; or, the indexes of the pilot subcarriers included in the first resource unit are: -111, -55, 20, 75.

[0033] In one possible design, the indexes of the pilot subcarriers included in the first resource unit are: -99, -43, 31, 87; or, the indexes of the pilot subcarriers included in the first resource unit are: -99, -44, 30, 87; or, the indexes of the pilot subcarriers included in the first resource unit are: -99, -44, 31, 86; or, the indexes of the pilot subcarriers included in the first resource unit are: -100, -43, 30, 87; or, the indexes of the pilot subcarriers included in the first resource unit are: -100, -43, 31, 86; or, the indexes of the pilot subcarriers included in the first resource unit are: -100, -44, 30, 86.

[0034] In one possible design, the indexes of the pilot subcarriers included in the first resource unit are: -88, -32, 42, 98; or, the indexes of the pilot subcarriers included in the first resource unit are: -88, -31, 43, 98; or, the indexes of the pilot subcarriers included in the first resource unit are: -88, -31, 42, 99; or, the indexes of the pilot subcarriers included in the first resource unit are: -87, -32, 43, 98; or, the indexes of the pilot subcarriers included in the first resource unit are: -87, -32, 42, 99; or, the indexes of the pilot subcarriers included in the first resource unit are: -87, -31, 43, 99.

[0035] In one possible design, the indexes of the pilot subcarriers included in the first resource unit are: -75, -20, 55, 111; or, the indexes of the pilot subcarriers included in the first resource unit are: -75, -21, 54, 111; or, the indexes of the pilot subcarriers included in the first resource unit are: -75, -21, 55, 110; or, the indexes of the pilot subcarriers included in the first resource unit are: -76, -20, 54, 111; or, the indexes of the pilot subcarriers included in the first resource unit are: -76, -20, 55, 110; or, the indexes of the pilot subcarriers included in the first resource unit are: -76, -21, 54, 110.

[0036] Based on the above four possible designs, multiple feasible solutions are provided for the design of the pilot subcarriers included in the first resource unit.

[0037] In one possible design, the pilot subcarriers included in the first resource unit are the same as the pilot subcarriers included in the two second resource units, and the pilot subcarriers included in the second resource unit are the two pilot subcarriers with odd sorting numbers among the subcarriers of the first resource unit; or, the pilot subcarriers included in the second resource unit are the two pilot subcarriers with even sorting numbers among the subcarriers of the first resource unit.

[0038] Based on this possible design, the pilot subcarriers included in the second resource unit can also be determined according to the pilot subcarriers included in the first resource unit.

[0039] In one possible design, the subcarriers included in the first resource unit are a subset of the subcarriers included in the third resource unit, the third resource unit includes 2 first resource units and 2 single subcarriers, and the pilot subcarriers included in the third resource unit are 4 pilot subcarriers among the 8 pilot subcarriers included in the 2 first resource units.

[0040] Based on this possible design, the pilot subcarriers can be distributed more evenly, avoiding the pilot subcarriers of the third resource unit being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0041] In one possible design, the pilot subcarriers included in the third resource unit are the four pilot subcarriers included in one of the two first resource units.

[0042] Based on this possible design, the pilot subcarriers can be distributed more evenly, avoiding the pilot subcarriers of the third resource unit being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0043] In one possible design, the pilot subcarriers included in the third resource unit are the four pilot subcarriers included in the first first resource unit; or, the pilot subcarriers included in the third resource unit are the four pilot subcarriers included in the fourth first resource unit.

[0044] Based on this possible design, the pilot subcarriers of the first third resource unit are the four pilot subcarriers included in the first first resource unit. At the same time, the pilot subcarriers of the second third resource unit are the four pilot subcarriers included in the fourth first resource unit. This can make the spacing between the pilot subcarriers of the two third resource units larger, thereby avoiding the pilot subcarriers of different first resource units being too close, and further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0045] In a second aspect, the present application provides a communication method, which can be performed by a first communication device. Unless otherwise specified, the "first communication device" in this application can refer to the first communication device itself, or a component in the first communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can implement all or part of the functions of the first communication device. The method includes: transmitting orthogonal frequency division multiplexing OFDM symbols through a second resource unit; wherein the two second resource units include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers includes a first subcarrier, a second subcarrier and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete.

[0046] Based on the second aspect, a second resource unit designed based on distributed RU technology is provided, which can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (that is, obtain better power amplification effect), that is, the above-mentioned second resource unit can achieve a larger power amplification factor.

[0047] In one possible design, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers spaced between the first subcarrier and the second subcarrier is greater than or equal to 3; or, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers spaced between the second subcarrier and the third subcarrier is greater than or equal to 3.

[0048] Based on this possible design, the number of subcarriers spaced between two discrete subcarriers may be greater than or equal to 3, so as to determine more second resource units in the 20 MHz bandwidth as evenly as possible.

[0049] In one possible design, the indexes of the subcarriers included in the second resource unit are: -122, -117, -104, -94, -89, -76, -66, -61, -48, -38, -33, -21, -12, -7, 13, 22, 27, 40, 50, 55, 68, 78, 83, 96, 106, and 111.

[0050] In one possible design, the indexes of the subcarriers included in the second resource unit are: -118, -108, -103, -90, -80, -75, -62, -52, -47, -34, -25, -20, -8, 9, 14, 26, 36, 41, 54, 64, 69, 82, 92, 97, 110, and 119.

[0051] In one possible design, the indexes of the subcarriers included in the second resource unit are: -121, -115, -102, -93, -87, -74, -65, -59, -46, -37, -31, -19, -11, -5, 15, 23, 29, 42, 51, 57, 70, 79, 85, 98, 107, and 113.

[0052] In one possible design, the indexes of the subcarriers included in the second resource unit are: -116, -107, -101, -88, -79, -73, -60, -51, -45, -32, -24, -18, -6, 10, 16, 28, 37, 43, 56, 65, 71, 84, 93, 99, 112, and 120.

[0053] In one possible design, the indexes of the subcarriers included in the second resource unit are: -120, -113, -100, -92, -85, -72, -64, -57, -44, -36, -29, -17, -10, -3, 17, 24, 31, 44, 52, 59, 72, 80, 87, 100, 108, and 115.

[0054] In one possible design, the indexes of the subcarriers included in the second resource unit are: -114, -106, -99, -86, -78, -71, -58, -50, -43, -30, -23, -16, -4, 11, 18, 30, 38, 45, 58, 66, 73, 86, 94, 101, 114, 121.

[0055] In one possible design, the indexes of the subcarriers included in the second resource unit are: -119, -111, -98, -91, -83, -70, -63, -55, -42, -35, -27, -15, -9, 2, 19, 25, 33, 46, 53, 61, 74, 81, 89, 102, 109, 117.

[0056] In one possible design, the indexes of the subcarriers included in the second resource unit are: -112, -105, -97, -84, -77, -69, -56, -49, -41, -28, -22, -14, -2, 12, 20, 32, 39, 47, 60, 67, 75, 88, 95, 103, 116, and 122.

[0057] Based on the above eight possible designs, multiple feasible solutions are provided for the design of the second resource unit.

[0058] In one possible design, the subcarriers included in the second resource unit are a subset of the subcarriers included in the first resource unit; the first resource unit includes 17 groups of subcarriers and 1 single subcarrier.

[0059] Based on this possible design, the first resource unit can also be determined according to the second resource unit, providing multiple feasible solutions for the design of the resource unit.

[0060] In one possible design, the second resource unit includes 2 discrete pilot subcarriers; when the second subcarrier and the third subcarrier are continuous, the 4 discrete pilot subcarriers included in the two second resource units are 4 discrete subcarriers among the 17 second subcarriers and 17 third subcarriers.

[0061] In one possible design, the second resource unit includes 2 discrete pilot subcarriers; when the first subcarrier and the second subcarrier are continuous, the 4 discrete pilot subcarriers included in the two second resource units are 4 discrete subcarriers among the 17 first subcarriers and 17 second subcarriers.

[0062] Based on the above two possible designs, by determining the pilot subcarrier as one of two consecutive subcarriers, the combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier. During the channel estimation process, the channel estimation can be made more accurate, thereby improving the accuracy of phase deviation estimation and reducing the packet error rate.

[0063] In one possible design, the indexes of the pilot subcarriers included in the second resource unit are: -112, -56; or, the indexes of the pilot subcarriers included in the second resource unit are: 19, 74; or, the indexes of the pilot subcarriers included in the second resource unit are: -112, 20; or, the indexes of the pilot subcarriers included in the second resource unit are: -55, 74; or, the indexes of the pilot subcarriers included in the second resource unit are: -112, 75; or, the indexes of the pilot subcarriers included in the second resource unit are: -55, 19; or, the indexes of the pilot subcarriers included in the second resource unit are: -111, 74; or, the indexes of the pilot subcarriers included in the second resource unit are: -56, 20; or, the indexes of the pilot subcarriers included in the second resource unit are: -111, 19; or, the indexes of the pilot subcarriers included in the second resource unit are: -56, 75; or, the indexes of the pilot subcarriers included in the second resource unit are: -111, -55; or, the indexes of the pilot subcarriers included in the second resource unit are: 20, 75.

[0064] In one possible design, the indexes of the pilot subcarriers included in the second resource unit are: -99, -43; or, the indexes of the pilot subcarriers included in the second resource unit are: 31, 87; or, the indexes of the pilot subcarriers included in the second resource unit are: -99, 30; or, the indexes of the pilot subcarriers included in the second resource unit are: -44, 87; or, the indexes of the pilot subcarriers included in the second resource unit are: -99, 86; or, the indexes of the pilot subcarriers included in the second resource unit are: -44, 3 1; or, the indexes of the pilot subcarriers included in the second resource unit are: -43, 30; or, the indexes of the pilot subcarriers included in the second resource unit are: -100, 87; or, the indexes of the pilot subcarriers included in the second resource unit are: -43, 86; or, the indexes of the pilot subcarriers included in the second resource unit are: -100, 31; or, the indexes of the pilot subcarriers included in the second resource unit are: 30, 86; or, the indexes of the pilot subcarriers included in the second resource unit are: -100, -44.

[0065] In one possible design, the indexes of the pilot subcarriers included in the second resource unit are: -88, -32; or, the indexes of the pilot subcarriers included in the second resource unit are: 42, 98; or, the indexes of the pilot subcarriers included in the second resource unit are: -88, 43; or, the indexes of the pilot subcarriers included in the second resource unit are: -31, 98; or, the indexes of the pilot subcarriers included in the second resource unit are: -88, 99; or, the indexes of the pilot subcarriers included in the second resource unit are: -31, 42; or, the indexes of the pilot subcarriers included in the second resource unit are: -32, 43; or, the indexes of the pilot subcarriers included in the second resource unit are: -87, 98; or, the indexes of the pilot subcarriers included in the second resource unit are: -32, 99; or, the indexes of the pilot subcarriers included in the second resource unit are: -87, 42; or, the indexes of the pilot subcarriers included in the second resource unit are: 43, 99; or, the indexes of the pilot subcarriers included in the second resource unit are: -87, -31.

[0066] In one possible design, the indexes of the pilot subcarriers included in the second resource unit are: -75, -20; or, the indexes of the pilot subcarriers included in the second resource unit are: 55, 111; or, the indexes of the pilot subcarriers included in the second resource unit are: -75, 54; or, the indexes of the pilot subcarriers included in the second resource unit are: -21, 111; or, the indexes of the pilot subcarriers included in the second resource unit are: -75, 110; or, the indexes of the pilot subcarriers included in the second resource unit are: -21, 55; or, the indexes of the pilot subcarriers included in the second resource unit are: -20, 54; or, the indexes of the pilot subcarriers included in the second resource unit are: -76, 111; or, the indexes of the pilot subcarriers included in the second resource unit are: -20, 110; or, the indexes of the pilot subcarriers included in the second resource unit are: -76, 55; or, the indexes of the pilot subcarriers included in the second resource unit are: 54, 110; or, the indexes of the pilot subcarriers included in the second resource unit are: -76, -21.

[0067] Based on the above four possible designs, multiple feasible solutions are provided for the design of the pilot subcarriers included in the second resource unit.

[0068] On the third aspect, the present application provides a communication method, which can be executed by a first communication device. Unless otherwise specified, the "first communication device" in the present application can refer to the first communication device itself, or a component in the first communication device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the first communication device. The method includes: transmitting orthogonal frequency division multiplexing OFDM symbols through a third resource unit; wherein the third resource unit includes 17 groups of subcarriers and 4 single subcarriers, each group of subcarriers includes a fourth subcarrier, a fifth subcarrier, a sixth subcarrier, a seventh subcarrier, an eighth subcarrier, and a ninth subcarrier arranged in frequency domain order; the fourth subcarrier and the fifth subcarrier are discrete, the fifth subcarrier and the sixth subcarrier are discrete, the sixth subcarrier and the seventh subcarrier are continuous, the seventh subcarrier and the eighth subcarrier are discrete, and the eighth subcarrier and the ninth subcarrier are continuous.

[0069] Based on the third aspect, a third resource unit designed based on distributed RU technology is provided, which can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (that is, to obtain a better power amplification effect), that is, the above-mentioned third resource units can all achieve a larger power amplification factor. At the same time, the third resource unit can include two consecutive subcarriers, which is convenient for smoothing the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0070] In one possible design, the number of subcarriers spaced between the fourth subcarrier and the fifth subcarrier is greater than or equal to 1; and / or, the number of subcarriers spaced between the fifth subcarrier and the sixth subcarrier is greater than or equal to 1; and / or, the number of subcarriers spaced between the seventh subcarrier and the eighth subcarrier is greater than or equal to 2.

[0071] Based on this possible design, the number of subcarriers spaced between two discrete subcarriers may be greater than or equal to 1, and / or greater than or equal to 2, so as to determine more third resource units in the 20 MHz bandwidth as evenly as possible.

[0072] In one possible design, 20MHz includes 2 third resource units; the fourth subcarriers in the nth group of subcarriers of the 2 third resource units are continuous, and / or, the fifth subcarriers in the nth group of subcarriers of the 2 third resource units are continuous, and / or, the sixth subcarrier and the seventh subcarrier in the nth group of subcarriers of the 2 third resource units are continuous, and / or, the eighth subcarrier and the ninth subcarrier in the nth group of subcarriers of the 2 third resource units are continuous, n=1,2,…,17.

[0073] In one possible design, the fourth subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the fifth subcarrier in the nth group of subcarriers of the first third resource unit; and / or, the fifth subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the sixth subcarrier in the nth group of subcarriers of the first third resource unit; and / or, the seventh subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the eighth subcarrier in the nth group of subcarriers of the first third resource unit, n=1,2,…,17.

[0074] Based on the above two possible designs, the above two third resource units can be determined as evenly as possible in the 20 MHz bandwidth.

[0075] In one possible design, the third resource unit includes subcarrier indexes of: -122, -120, -118, -117, -114, -113, -108, -106, -104, -103, -100, -99, -94, -92, -90, -89, -86, -85, -80, -78, -76, -75, -72, -71, -66, -64, -62, -61, -58, -57, -52, -50, -48, -47, -44, -43, -38, -36, -34, -33, -30, -29, - 25, -23, -21, -20, -17, -16, -12, -10, -8, -7, -4, -3, 3, 5, 9, 11, 13, 14, 17, 18, 22, 24, 26, 27, 30, 31, 36, 38, 40, 41, 44, 45, 50, 52, 54, 55, 58, 59, 64, 66, 68, 69, 72, 73, 78, 80, 82, 83, 86, 87, 92, 94, 96, 97, 100, 101, 106, 108, 110, 111, 114, 115, 119, 121.

[0076] In one possible design, the third resource unit includes subcarrier indexes of: -121, -119, -116, -115, -112, -111, -107, -105, -102, -101, -98, -97, -93, -91, -88, -87, -84, -83, -79, -77, -74, -73, -70, -69, -65, -63, -60, -59, -56, -55, -51, -49, -46, -45, -42, -41, -37, -35, -32, -31, -28, -27, - 24, -22, -19, -18, -15, -14, -11, -9, -6, -5, -2, 2, 4, 6, 10, 12, 15, 16, 19, 20, 23, 25, 28, 29, 32, 33, 37, 39, 42, 43, 46, 47, 51, 53, 56, 57, 60, 61, 65, 67, 70, 71, 74, 75, 79, 81, 84, 85, 88, 89, 93, 95, 98, 99, 102, 103, 107, 109, 112, 113, 116, 117, 120, 122.

[0077] Based on the above two possible designs, multiple feasible solutions are provided for the design of the third resource unit.

[0078] In one possible design, the subcarriers included in the third resource unit include two subcarriers included in the first resource unit, the first resource unit includes 17 groups of subcarriers and 1 single subcarrier; each group of subcarriers includes a fourth subcarrier, a sixth subcarrier and a seventh subcarrier arranged in frequency domain order; the fourth subcarrier and the sixth subcarrier are discrete.

[0079] In one possible design, the subcarriers included in the third resource unit include two subcarriers included in the first resource unit, the first resource unit includes 17 groups of subcarriers and 1 single subcarrier; each group of subcarriers includes a fifth subcarrier, an eighth subcarrier and a ninth subcarrier arranged in frequency domain order; the fifth subcarrier and the eighth subcarrier are discrete.

[0080] Based on the above two possible designs, the first resource unit can also be determined according to the third resource unit, providing multiple feasible solutions for the design of resource units.

[0081] In one possible design, the third resource unit includes 4 discrete pilot subcarriers; the 4 discrete pilot subcarriers are 4 discrete subcarriers among 17 sixth subcarriers, 17 seventh subcarriers, 17 eighth subcarriers and 17 ninth subcarriers.

[0082] In one possible design, the 4 discrete pilot subcarriers are 4 discrete subcarriers among the 17 sixth subcarriers and the 17 seventh subcarriers; or, the 4 discrete pilot subcarriers are 4 discrete subcarriers among the 17 eighth subcarriers and the 17 ninth subcarriers.

[0083] Based on the above two possible designs, by determining the pilot subcarrier as one of two consecutive subcarriers, the combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier. During the channel estimation process, the channel estimation can be made more accurate, thereby improving the accuracy of phase deviation estimation and reducing the packet error rate.

[0084] In one possible design, the four pilot subcarriers included in the third resource unit are respectively located in the 1st, 5th, 10th and 14th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the third resource unit are respectively located in the 2nd, 6th, 11th and 15th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the third resource unit are respectively located in the 3rd, 7th, 12th and 16th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the third resource unit are respectively located in the 4th, 8th, 13th and 17th groups of subcarriers arranged in frequency domain order.

[0085] Based on this possible design, the pilot subcarriers can be distributed more evenly, avoiding the pilot subcarriers of the first resource unit being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0086] In one possible design, the indexes of the pilot subcarriers included in the third resource unit are: -112, -56, 19, 74; or, the indexes of the pilot subcarriers included in the third resource unit are: -112, -55, 20, 74; or, the indexes of the pilot subcarriers included in the third resource unit are: -112, -55, 19, 75; or, the indexes of the pilot subcarriers included in the third resource unit are: -111, -56, 20, 74; or, the indexes of the pilot subcarriers included in the third resource unit are: -111, -56, 19, 75; or, the indexes of the pilot subcarriers included in the third resource unit are: -111, -55, 20, 75.

[0087] In one possible design, the indexes of the pilot subcarriers included in the third resource unit are: -99, -43, 31, 87; or, the indexes of the pilot subcarriers included in the third resource unit are: -99, -44, 30, 87; or, the indexes of the pilot subcarriers included in the third resource unit are: -99, -44, 31, 86; or, the indexes of the pilot subcarriers included in the third resource unit are: -100, -43, 30, 87; or, the indexes of the pilot subcarriers included in the third resource unit are: -100, -43, 31, 86; or, the indexes of the pilot subcarriers included in the third resource unit are: -100, -44, 30, 86.

[0088] In one possible design, the indexes of the pilot subcarriers included in the third resource unit are: -88, -32, 42, 98; or, the indexes of the pilot subcarriers included in the third resource unit are: -88, -31, 43, 98; or, the indexes of the pilot subcarriers included in the third resource unit are: -88, -31, 42, 99; or, the indexes of the pilot subcarriers included in the third resource unit are: -87, -32, 43, 98; or, the indexes of the pilot subcarriers included in the third resource unit are: -87, -32, 42, 99; or, the indexes of the pilot subcarriers included in the third resource unit are: -87, -31, 43, 99.

[0089] In one possible design, the indexes of the pilot subcarriers included in the third resource unit are: -75, -20, 55, 111; or, the indexes of the pilot subcarriers included in the third resource unit are: -75, -21, 54, 111; or, the indexes of the pilot subcarriers included in the third resource unit are: -75, -21, 55, 110; or, the indexes of the pilot subcarriers included in the third resource unit are: -76, -20, 54, 111; or, the indexes of the pilot subcarriers included in the third resource unit are: -76, -20, 55, 110; or, the indexes of the pilot subcarriers included in the third resource unit are: -76, -21, 54, 110.

[0090] Based on the above four possible designs, multiple feasible solutions are provided for the design of the pilot subcarriers included in the third resource unit.

[0091] In combination with the above-mentioned first to third aspects, in one possible design, the 20MHz bandwidth includes 15 protection subcarriers, of which 8 protection subcarriers are located in the low-frequency edge area of ​​20MHz and 7 protection subcarriers are located in the high-frequency edge area of ​​20MHz.

[0092] Based on this possible design, the benefit of increasing the number of guard subcarriers is that it makes the transmitted signal more likely to conform to the spectrum template, is more friendly to the design of the transceiver filter, and can also reduce interference with adjacent channels.

[0093] In combination with the above-mentioned first to third aspects, in a possible design, orthogonal frequency division multiplexing OFDM symbols are transmitted through the DRU within a 20MHz discrete bandwidth in the first bandwidth; wherein, the subcarrier index of the DRU in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the 20MHz bandwidth plus ax, a is the number of protection subcarriers on the first side of the first bandwidth, x is the number of protection subcarriers on the first side of the 20MHz bandwidth, and both a and x are positive integers; or the subcarrier index of the DRU in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the 20MHz bandwidth minus by, b is the number of protection subcarriers on the second side of the first bandwidth, y is the number of protection subcarriers on the second side of the 20MHz bandwidth, and both b and y are positive integers.

[0094] Based on the first aspect, compared with the subcarriers of the DRU in the 20MHz bandwidth, the subcarriers of the DRU in the 20MHz discrete bandwidth provided in this application are shifted to the right by ax subcarriers, so that the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is a, which is the same as the number of protection subcarriers on the first side of the first bandwidth. The subcarrier distribution of the 20MHz discrete bandwidth conforms to the spectrum template of the first bandwidth. When the first communication device schedules and transmits the DRU based on the 20MHz discrete bandwidth in the first bandwidth, the communication performance can be improved.

[0095] Alternatively, compared to the subcarriers of the DRU in the 20MHz bandwidth, the subcarriers of the DRU in the 20MHz discrete bandwidth provided in the present application are shifted to the left by by subcarriers, so that the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is b, which is the same as the number of protection subcarriers on the second side of the first bandwidth. The subcarrier distribution of the 20MHz discrete bandwidth conforms to the spectrum template of the first bandwidth. When the first communication device schedules and transmits the DRU based on the 20MHz discrete bandwidth in the first bandwidth, the communication performance can be improved.

[0096] In combination with the first to third aspects above, in one possible design, a is 12, b is 11, x is 8, and y is 7.

[0097] In combination with the first to third aspects above, in a possible design, OFDM symbols are transmitted through a DRU within a 20MHz discrete bandwidth in a first bandwidth, including: within a 20MHz discrete bandwidth, OFDM symbols are transmitted through a DRU that does not include one or more of the following subcarriers: a subcarrier with an index of -1, a subcarrier with an index of 0, or a subcarrier with an index of 1.

[0098] Based on this possible design, in the above method, when the subcarrier is shifted, the position of the DC subcarrier (such as the subcarrier with a subcarrier index of -1, 0, or 1) is moved, which is not friendly to 20MHz-only sites. Therefore, for 20MHz-only sites, communication can be carried out by using a DRU that does not include a DC subcarrier to improve communication performance.

[0099] In combination with the above-mentioned first to third aspects, in a possible design, orthogonal frequency division multiplexing OFDM symbols are transmitted through distributed resource units DRUs within a 20MHz discrete bandwidth in a first bandwidth; wherein, the subcarrier index of the DRU in the nth area in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the n'th area in the 20MHz bandwidth plus the nth value; n = n' = 1, 2,…, N; N is a positive integer.

[0100] Based on this possible design, when scheduling and transmitting DRUs based on a 20 MHz discrete bandwidth in the first bandwidth, the useful subcarriers in N regions of the 20 MHz bandwidth can be shifted on the 20 MHz bandwidth spectrum to obtain useful subcarriers in the 20 MHz discrete bandwidth. This shifting increases the number of protection subcarriers, ensuring that the subcarrier distribution in the 20 MHz discrete bandwidth complies with the spectrum template, adjacent channel interference requirements, and transceiver filter design of the first bandwidth, facilitating development and testing. Furthermore, the position of the DC subcarrier remains unchanged, making it more user-friendly for 20 MHz-only sites and improving communication performance.

[0101] In combination with the above-mentioned first to third aspects, in one possible design, the subcarrier index of the DRU in the 20MHz discrete bandwidth in the first area is the subcarrier index of the DRU in the 20MHz bandwidth in the 1st' area plus ax; the subcarrier index of the DRU in the 20MHz discrete bandwidth in the second area is the subcarrier index of the DRU in the 20MHz bandwidth in the 2nd' area plus P; the subcarrier index of the DRU in the 20MHz discrete bandwidth in the third area is the subcarrier index of the DRU in the 20MHz bandwidth in the 3rd' area plus Q; wherein a is the number of protection subcarriers on the first side of the first bandwidth, x is the number of protection subcarriers on the first side of the 20MHz bandwidth, and a, x, P and Q are all positive integers.

[0102] In combination with the first to third aspects above, in one possible design, a is 12, x is 8, P is 7, and Q is 5.

[0103] In combination with the first to third aspects above, in one possible design, the first region includes the (a+1)th subcarrier to the (T+ax)th subcarrier arranged in frequency domain order in a 20 MHz discrete bandwidth; the first 'region includes the (x+1)th subcarrier to the Tth subcarrier arranged in frequency domain order in a 20 MHz bandwidth; the second region includes the (T+1+P)th subcarrier to the (128-(K-1) / 2+P)th subcarrier arranged in frequency domain order in a 20 MHz discrete bandwidth; the second 'region includes the (T+1+P)th subcarrier to the (128-(K-1) / 2+P)th subcarrier arranged in frequency domain order in a 20 MHz discrete bandwidth; the second 'region includes the (T+1+P)th subcarrier to the (128-(K-1) / 2+P)th subcarrier arranged in frequency domain order in a 20 MHz discrete bandwidth. +1) subcarrier to the (128-(K-1) / 2)th subcarrier; the third region includes the (130+(K-1) / 2+Q)th subcarrier to the (256-y+Q)th subcarrier arranged in frequency domain order in the 20MHz discrete bandwidth; the 3'th region includes the (130+(K-1) / 2)th subcarrier to the (256-y)th subcarrier arranged in frequency domain order in the 20MHz bandwidth; where K is the number of DC subcarriers in the 20MHz bandwidth, y is the number of protection subcarriers on the second side of the 20MHz bandwidth, and K, T and y are all positive integers.

[0104] In combination with the first to third aspects above, in one possible design, T is 123, K is 3, and y is 7.

[0105] Based on the above four possible designs, compared with the subcarriers of the DRU in the 20MHz bandwidth, the subcarriers in the first area of ​​the DRU in the 20MHz discrete bandwidth are shifted to the right by ax subcarriers, and the ax subcarriers on the left can be used as protection subcarriers, that is, the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is a (including x protection subcarriers and the aforementioned ax protection subcarriers), which is the same as the number of protection subcarriers on the first side of the first bandwidth. The subcarrier distribution of the 20MHz discrete bandwidth conforms to the spectrum template of the first bandwidth. When the first communication device schedules and transmits the DRU based on the 20MHz discrete bandwidth in the first bandwidth, the communication performance can be improved. At the same time, the position of the DC subcarrier is not changed, which is more friendly to 20MHz-only sites.

[0106] In combination with the above-mentioned first to third aspects, in one possible design, the subcarrier index of the DRU in the 20MHz discrete bandwidth in the first area is the subcarrier index of the DRU in the 20MHz bandwidth in the 1st' area plus -Q; the subcarrier index of the DRU in the 20MHz discrete bandwidth in the second area is the subcarrier index of the DRU in the 20MHz discrete bandwidth in the 2nd' area plus -P; the subcarrier index of the DRU in the 20MHz discrete bandwidth in the third area is the subcarrier index of the DRU in the 20MHz bandwidth in the 3rd' area plus -(by); wherein b is the number of protection subcarriers on the second side of the first bandwidth, y is the number of protection subcarriers on the second side of the 20MHz bandwidth, and b, y, P and Q are all positive integers.

[0107] In combination with the above-mentioned first to third aspects, in one possible design, b is 11, y is 7, P is 7, and Q is 5.

[0108] In combination with the first to third aspects above, in one possible design, the first region includes the (x+1-Q)th subcarrier to the (128-(K-1) / 2-Q)th subcarrier arranged in frequency domain order in a 20MHz discrete bandwidth; the first 'region includes the (x+1)th subcarrier to the (128-(K-1) / 2)th subcarrier arranged in frequency domain order in a 20MHz bandwidth; the second region includes the (130+(K-1) / 2-P)th subcarrier to the (SP)th subcarrier arranged in frequency domain order in a 20MHz discrete bandwidth; the second 'region includes The (130+(K-1) / 2)th subcarrier to the Sth subcarrier arranged in frequency domain order in the 20MHz bandwidth; the third region includes the (S+1-b+y)th subcarrier to the (256-b)th subcarrier arranged in frequency domain order in the 20MHz discrete bandwidth; the 3'th region includes the (S+1)th subcarrier to the (256-y)th subcarrier arranged in frequency domain order in the 20MHz bandwidth; wherein, K is the number of DC subcarriers in the 20MHz bandwidth, x is the number of guard subcarriers on the first side of the 20MHz bandwidth, and K, S and x are all positive integers.

[0109] In combination with the first to third aspects above, in one possible design, S is 134, K is 3, and x is 8.

[0110] Based on the above four possible designs, compared with the subcarriers of the DRU in the 20MHz bandwidth, the subcarriers in the third area of ​​the DRU in the 20MHz discrete bandwidth are shifted to the left by by subcarriers, and the by subcarriers on the right can be used as protection subcarriers, that is, the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is b (including y protection subcarriers and the aforementioned by protection subcarriers), which is the same as the number of protection subcarriers on the second side of the first bandwidth. The subcarrier distribution of the 20MHz discrete bandwidth conforms to the spectrum template of the first bandwidth. When the first communication device schedules and transmits the DRU based on the 20MHz discrete bandwidth in the first bandwidth, the communication performance can be improved. At the same time, the position of the DC subcarrier is not changed, which is more friendly to 20MHz-only sites.

[0111] In a fourth aspect, the present application provides a communication device, which can be applied to the first communication device of the first aspect, the second aspect, or the third aspect to implement the functions performed by the first communication device. The communication device can be a first communication device, or a chip, a chip system, or a system on a chip, etc. of the first communication device. The communication device can perform the functions performed by the first communication device through hardware, or it can perform the corresponding software implementation through hardware. The hardware or software includes one or more modules corresponding to the above functions. For example, a transmission module and a processing module. The transmission module can independently complete the following transmission operations, or it can cooperate with the processing module to complete the following transmission operations; accordingly, the processing module can also independently complete the following processing operations, or it can cooperate with the transmission module to complete the following processing operations, without limitation.

[0112] Exemplarily, a transmission module is used to transmit orthogonal frequency division multiplexing (OFDM) symbols through a first resource unit; wherein the first resource unit includes 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete.

[0113] In another example, a transmission module is used to transmit orthogonal frequency division multiplexing OFDM symbols through a second resource unit; wherein the two second resource units include 17 groups of subcarriers and 1 single subcarrier, and each group of subcarriers includes a first subcarrier, a second subcarrier and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete.

[0114] In another example, a transmission module is used to transmit orthogonal frequency division multiplexing OFDM symbols through a third resource unit; wherein the third resource unit includes 17 groups of subcarriers and 4 single subcarriers, each group of subcarriers includes a fourth subcarrier, a fifth subcarrier, a sixth subcarrier, a seventh subcarrier, an eighth subcarrier, and a ninth subcarrier arranged in frequency domain order; the fourth subcarrier and the fifth subcarrier are discrete, the fifth subcarrier and the sixth subcarrier are discrete, the sixth subcarrier and the seventh subcarrier are continuous, the seventh subcarrier and the eighth subcarrier are discrete, and the eighth subcarrier and the ninth subcarrier are continuous.

[0115] Optionally, the transmission module and processing module of the communication device in the fourth aspect can also perform the corresponding functions in any possible design of the above-mentioned first aspect, or perform the corresponding functions in any possible design of the above-mentioned second aspect, or perform the corresponding functions in any possible design of the above-mentioned third aspect. Please refer to the detailed description in the method example for details, and the beneficial effects that can be achieved can also be found in the aforementioned related content.

[0116] In a fifth aspect, an embodiment of the present application provides a communication device, which includes one or more transceivers, and the transceivers execute the communication method described in any one of the first to third aspects under the control of a processor.

[0117] In one possible design, the communication device further includes one or more memories, the one or more memories being coupled to one or more processors, and the one or more memories being used to store computer programs or instructions. In one possible implementation, the memory is located outside the communication device. In another possible implementation, the memory is located within the communication device. In an embodiment of the present application, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together. In one possible implementation, the communication device further includes a transceiver, which is used to receive information and / or send information.

[0118] In one possible design, the transceiver may also be a communication interface, one or more communication interfaces are coupled to one or more processors, and the one or more communication interfaces are used to communicate with other modules outside the communication device.

[0119] In a sixth aspect, an embodiment of the present application provides a communication device, which includes an interface circuit, and the interface circuit is used to execute the communication method described in any one of the first to third aspects under the control of the logic circuit.

[0120] In the seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer instructions or programs. When the computer instructions or programs are run on a computer, the communication method described in any one of the first to third aspects is executed.

[0121] In an eighth aspect, an embodiment of the present application provides a computer program product comprising computer instructions, which, when executed on a computer, enables the communication method described in any one of the first to third aspects to be executed.

[0122] In a ninth aspect, an embodiment of the present application provides a computer program, which, when executed on a computer, enables the communication method described in any one of the first to third aspects to be executed.

[0123] In a tenth aspect, an embodiment of the present application provides a chip, comprising: a transceiver unit, the transceiver unit being configured to execute the communication method as described in any one of the first to third aspects under the control of a processing unit.

[0124] Among them, the technical effects brought about by any one of the design methods in the fifth to tenth aspects can refer to the technical effects brought about by any one of the first to third aspects mentioned above, and will not be repeated here.

[0125] In the eleventh aspect, an embodiment of the present application provides a communication system, which may include a communication device for executing the communication method as described in the first aspect or any possible design of the first aspect, or includes a communication device for executing the communication method as described in the second aspect or any possible design of the second aspect, or includes a communication device for executing the communication method as described in the third aspect or any possible design of the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0126] FIG1 is a schematic diagram of a 20 MHz subcarrier distribution according to an embodiment of the present application;

[0127] FIG2 is a schematic diagram of a 40 MHz subcarrier distribution according to an embodiment of the present application;

[0128] FIG3 is a schematic diagram of an 80 MHz subcarrier distribution according to an embodiment of the present application;

[0129] FIG4 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0130] FIG5 is a schematic diagram of the composition of a communication device provided in an embodiment of the present application;

[0131] FIG6 is a flow chart of a communication method provided in an embodiment of the present application;

[0132] FIG7 is a schematic diagram of an index of subcarriers included in a first resource unit provided in an embodiment of the present application;

[0133] FIG8 is a schematic diagram of an index of subcarriers included in a resource unit provided in an embodiment of the present application;

[0134] FIG9 is a schematic diagram of an index of subcarriers included in a second resource unit provided in an embodiment of the present application;

[0135] FIG10 is a schematic diagram of an index of subcarriers included in a third resource unit provided in an embodiment of the present application;

[0136] FIG11 is a flow chart of a communication method provided in an embodiment of the present application;

[0137] FIG12 is a flow chart of a communication method provided in an embodiment of the present application;

[0138] FIG13 is a schematic diagram of an uplink multi-user transmission provided in an embodiment of the present application;

[0139] FIG14 is a schematic diagram of a frame structure of a trigger frame provided in an embodiment of the present application;

[0140] FIG15 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0141] FIG16 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0142] FIG17 is a schematic diagram of pilot subcarriers included in a resource unit provided in an embodiment of the present application;

[0143] FIG18 is a schematic diagram of a newly added protection subcarrier provided in an embodiment of the present application;

[0144] FIG19 is a schematic diagram of a second 20 MHz puncture in an 80 MHz bandwidth according to an embodiment of the present application;

[0145] FIG20 is a schematic diagram showing that an 80 MHz tone plan does not match a 20 MHz tone plan provided in an embodiment of the present application;

[0146] FIG21 is a flow chart of a communication method provided in an embodiment of the present application;

[0147] FIG22 is a flow chart of a communication method provided in an embodiment of the present application;

[0148] Figure 23 is a flowchart of a communication method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0149] Before describing the embodiments of the present application, the technical terms involved in the embodiments of the present application are described.

[0150] The technical solution provided in the embodiments of the present application can be applied to wireless local area networks (WLANs) that support relevant standards of the Institute of Electrical and Electronics Engineers (IEEE). The relevant IEEE standards include: 802.11a / b / g standards, 802.11n standards, 802.11ac standards, 802.11ax standards, 802.11be standards, 802.11bn standards / UHR standards / WiFi8 standards, 802.11ad standards, 802.11ay standards, 802.11bf standards / sensing standards, UWB standards / 802.15 standards, etc.

[0151] In terms of bandwidth configuration, the 802.11ax standard currently supports the following bandwidth configurations: 20MHz, 40MHz, 80MHz, 160MHz, and 80+80MHz. The 802.11be standard also supports 320MHz bandwidth configuration.

[0152] The difference between 160MHz and 80+80MHz is that the former is a continuous frequency band, while the two 80MHz bands in the latter can be separated.

[0153] In a WLAN communication system, resource allocation can be performed in units of resource units (RUs), and communication devices can communicate with each other via RUs. The following describes RUs in detail using various examples of RU-based subcarrier distribution (tone plan) as an example.

[0154] In the first example, as shown in Figure 1, when the bandwidth is 20 MHz, the entire bandwidth can be composed of a 242-tone RU, or various combinations of 26-tone RUs, 52-tone RUs, and 106-tone RUs. Each RU includes data subcarriers and pilot subcarriers. The data subcarriers carry data information, while the pilot subcarriers are used to estimate phase and frequency offsets. In addition to the RU, some guard subcarriers, null subcarriers, or direct current (DC) subcarriers may also be included.

[0155] In the second example, as shown in Figure 2, when the bandwidth is 40 MHz, the entire bandwidth is roughly equivalent to a replication of the 20 MHz subcarrier distribution. The entire bandwidth can be composed of a whole 484-tone RU or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, and 242-tone RU.

[0156] In the third example, as shown in Figure 3, when the bandwidth is 80 MHz, the entire bandwidth can be composed of four 242-tone RUs. Alternatively, the entire bandwidth can be composed of a 996-tone RU, or various combinations of 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, and 484-tone RUs. 484L and 484R represent the left and right halves of a 484-tone RU, respectively, each containing 242 subcarriers. This is another schematic diagram of 484+5DC.

[0157] In the fourth example, when the bandwidth is 160 MHz, the entire bandwidth can be viewed as a replication of two 80 MHz subcarrier distributions. The entire bandwidth can be composed of a whole 2*996-tone RU, or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU, and 996-tone RU.

[0158] In the fifth example, when the bandwidth is 320 MHz, the entire bandwidth can be viewed as a replication of four 80 MHz subcarrier distributions.

[0159] Based on the description of subcarrier distribution in various examples above, with 242-tone RU as the unit, the left side of the figure can be regarded as the lowest frequency and the right side of the figure can be regarded as the highest frequency. From left to right, the 242-tone RU can be numbered: 1 st , 2 nd It is understood that, in the data field, at most 16 242-tone RUs correspond to 16 20 MHz channels in ascending order of frequency.

[0160] In addition to the RU types mentioned above, the 802.11be standard also introduces the following RU types: a 52-tone RU and a 26-tone RU consisting of a 52+26-tone RU; a 106+26-tone RU consisting of a 106-tone RU and a 26-tone RU; a 484+242-tone RU consisting of a 484-tone RU and a 242-tone RU; a 996+484-tone RU consisting of a 996-tone RU and a 484-tone RU; a 2*996+484-tone RU consisting of two 996-tone RUs and a 484-tone RU; a 3*996-tone RU consisting of three 996-tone RUs; and a 3*996+484-tone RU consisting of three 996-tone RUs and a 484-tone RU. At the bandwidth level, a 26-tone RU corresponds to approximately 2 MHz, a 52-tone RU corresponds to approximately 4 MHz, a 106-tone RU corresponds to approximately 8 MHz, and a 242-tone RU corresponds to approximately 20 MHz. The sizes of other RUs can be added or multiplied accordingly and are not detailed here.

[0161] In addition, with the continuous development of communication technology, strict restrictions are placed on maximum power and maximum power spectrum density, that is, the transmission power of a communication device cannot exceed the maximum power value, and the transmitted power spectrum density cannot exceed the maximum power spectrum density.

[0162] For example, taking the description of the indoor low power (LPI) communication method in the 6GHz spectrum regulations as an example, as shown in Table 1 below, for a client connected to a low-power access point, such as a station (STA), taking the transmit power as the equivalent isotropic radiated power (EIRP) as an example, the maximum power is 24dBm and the maximum power spectral density is -1dBm / MHz. Compared with the maximum power, the maximum power spectral density is more strictly limited, and the maximum power allowed to be transmitted is usually more limited by the power spectral density. For the station, the maximum power limit specified in the regulations is reached when the bandwidth is the maximum 320MHz. Below this bandwidth, it can only transmit a lower power due to the limitation of the maximum power spectral density.

[0163] Table 1

[0164] In another example, taking the description of LPI communication methods in the 6GHz spectrum regulations as an example, as shown in Table 2 below, for access points (APs) and / or STAs, taking the transmit power as equivalent isotropic radiated power (EIRP) as an example, the maximum power is 23dBm and the maximum power spectral density is 10dBm / MHz. When the bandwidth does not exceed 20MHz, the AP / STA transmit power is primarily limited by the maximum power spectral density. When the bandwidth is greater than 20MHz, the AP / STA transmit power is primarily limited by the maximum power.

[0165] Table 2

[0166] Based on the above description of maximum power and maximum power spectral density, the above RU design meets the limitations of maximum power and maximum power spectral density while leaving room for further power amplification.

[0167] Based on this, an embodiment of the present application provides a communication method, in which a first communication device can transmit orthogonal frequency division multiplexing (OFDM) symbols through a first resource unit; the first resource unit may include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers including a first subcarrier, a second subcarrier and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete.

[0168] The embodiment of the present application provides a first resource unit designed based on distributed RU (distributed resource unit, DRU) technology (or discrete RU technology), which can discretize the limited number of subcarriers to a wider bandwidth to improve the transmission power. At the same time, the first resource unit may include two consecutive subcarriers (such as a consecutive second subcarrier and a third subcarrier, or a consecutive first subcarrier and a second subcarrier), which facilitates smoothing of the estimated channel coefficients in channel estimation to obtain a channel smoothing gain, improve the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0169] The following describes in detail the implementation of the embodiments of the present application in conjunction with the accompanying drawings.

[0170] The communication method provided in the embodiment of the present application is applicable to a wireless local area network (WLAN) that supports the relevant standards of the Institute of Electrical and Electronics Engineers (IEEE). The relevant IEEE standards include: 802.11a / b / g standards, 802.11n standards, 802.11ac standards, 802.11ax standards, 802.11be standards, 802.11bn standards / UHR standards / WiFi8 standards, 802.11ad standards, 802.11ay standards, 802.11bf standards / sensing standards, UWB standards / 802.15 standards, etc., without limitation.

[0171] The following describes the WLAN communication system provided in an embodiment of the present application using FIG. 4 as an example.

[0172] Figure 4 is a schematic diagram of a communication system provided in an embodiment of the present application. As shown in Figure 4, the communication system may include access point devices and site devices; wherein, one or more access point devices can communicate with one or more site devices, the access point device can also communicate with one or more other access point devices, and the site device can also communicate with one or more other site devices.

[0173] The access point device may be an AP, and the station device may be a STA.

[0174] Exemplarily, the AP can be a device that supports multiple WLAN standards such as the 802.11be standard or future Wi-Fi standards; it can also be a device that supports the 802.11a / b / g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, 802.11be standard, 802.11bn standard / UHR standard / WiFi8 standard, without limitation.

[0175] For example, an AP can be a terminal device equipped with a Wi-Fi chip, a network device, a communications server, a router, a switch, a bridge, or a computer. APs can also serve as access points for mobile users to wired networks. They are primarily deployed in homes, buildings, and campuses, with a typical coverage radius of tens to hundreds of meters. They can also be deployed outdoors. An AP acts as a bridge between wired and wireless networks, connecting wireless network clients and then connecting the wireless network to the Ethernet.

[0176] Exemplarily, a STA may be a device that supports multiple WLAN standards, such as the 802.11be standard or future Wi-Fi standards; or a device that supports the 802.11a / b / g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, 802.11be standard, 802.11bn standard / UHR standard / WiFi8 standard, without limitation.

[0177] For example, a STA can be a wireless communication chip, a wireless sensor, a wireless communication terminal, a communication server, a router, a switch, a network bridge, a computer, etc. For example, a STA can be a mobile phone supporting Wi-Fi communication, a tablet supporting Wi-Fi communication, a set-top box supporting Wi-Fi communication, a smart TV supporting Wi-Fi communication, a smart wearable device supporting Wi-Fi communication, an in-vehicle communication device supporting Wi-Fi communication, a computer supporting Wi-Fi communication, etc., without limitation.

[0178] In a specific implementation, as shown in Figure 4 , for example, each access point device and station device may also adopt the structure shown in Figure 5 , or include the components shown in Figure 5 . Figure 5 is a schematic diagram of the structure of a communication device 500 provided in an embodiment of the present application. The communication device 500 may be an access point device or a chip or system-on-chip within an access point device; it may also be a station device or a chip or system-on-chip within a station device. As shown in Figure 5 , the communication device 500 includes a processor 501, a transceiver 502, and a communication circuit 503.

[0179] Furthermore, the communication device 500 may further include a memory 504 . The processor 501 , the memory 504 and the transceiver 502 may be connected via a communication line 503 .

[0180] The processor 501 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 501 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0181] The transceiver 502 is used to communicate with other devices or other communication networks. The other communication networks may be Ethernet, a radio access network (RAN), etc. The transceiver 502 may be a module, a circuit, a transceiver, or any device capable of implementing communication.

[0182] The communication line 503 is used to transmit information between the components included in the communication device 500.

[0183] The memory 504 is used to store instructions, where the instructions may be computer programs.

[0184] The memory 504 may be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions, or a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0185] It should be noted that the memory 504 can exist independently of the processor 501 or can be integrated with the processor 501. The memory 504 can be used to store instructions, program code, or some data. The memory 504 can be located within the communication device 500 or outside the communication device 500, without limitation. The processor 501 is configured to execute the instructions stored in the memory 504 to implement the communication method provided in the following embodiments of this application.

[0186] In an example, the processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 5 .

[0187] As an optional implementation, the communication device 500 includes multiple processors. For example, in addition to the processor 501 in FIG. 5 , it may also include a processor 507 .

[0188] As an optional implementation, the communication apparatus 500 further includes an output device 505 and an input device 506. For example, the input device 506 is a keyboard, a mouse, a microphone, a joystick, or the like, and the output device 505 is a display screen, a speaker, or the like.

[0189] It should be noted that the communication device 500 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a structure similar to that shown in FIG5 . Furthermore, the structure shown in FIG5 does not limit the communication device. In addition to the components shown in FIG5 , the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0190] In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices.

[0191] In addition, the actions and terms involved in the various embodiments of this application can refer to each other without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are only examples, and other names can also be used in specific implementations without limitation.

[0192] The communication method provided in an embodiment of the present application is described below in conjunction with the communication system shown in FIG4 and with reference to FIG6 below. The first communication device may be any access point device or station device in the communication system shown in FIG4. The first communication device described in the following embodiment may include FIG5 or the components shown in FIG5.

[0193] FIG6 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG6 , the method may include:

[0194] Step 601: A first communication device transmits an OFDM symbol through a first resource unit.

[0195] The first resource unit can include 17 groups of subcarriers and one single subcarrier. Each group of subcarriers includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in frequency domain order. The first subcarrier and the second subcarrier are discrete, while the second and third subcarriers are continuous. Alternatively, the first subcarrier and the second subcarrier are continuous, while the second and third subcarriers are discrete. This first resource unit can also be called a 52-tone DRU.

[0196] It should be understood that "continuous" in the embodiments of the present application includes physical continuity, that is, no other subcarriers exist between two consecutive subcarriers. For example, in the case where the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous, no other subcarriers exist between the consecutive second and third subcarriers. Alternatively, in the case where the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete, no other subcarriers exist between the consecutive first and second subcarriers.

[0197] The "continuous" in the embodiments of the present application may also include continuity after removing the DC subcarrier, that is, one or more DC subcarriers may exist between two consecutive subcarriers. For example, in the case where the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous, one or more DC subcarriers may exist between the continuous second subcarrier and the third subcarrier. Alternatively, in the case where the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete, one or more DC subcarriers may exist between the continuous first subcarrier and the second subcarrier.

[0198] Exemplarily, taking the subcarrier index included in 20MHz as [-128:127] as an example, when determining the subcarriers included in the first resource unit, the subcarrier index considered is [-122:-2, 2:122], wherein [-128:-123, 123:127] is the protection subcarrier, [-1:1] is the DC subcarrier, and the protection subcarrier and the DC subcarrier are both 0. That is, the subcarrier with an index of -2 and the subcarrier with an index of 2 can be considered as 2 consecutive subcarriers in the first resource unit. Or it can be described as: in the case where the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous, if the second subcarrier index of the first resource unit is -2 and the third subcarrier index is 2, the second subcarrier and the third subcarrier can be considered to be continuous. Or, in the case where the first subcarrier and the second subcarrier are continuous and the second subcarrier and the third subcarrier are discrete, if the first subcarrier index of the first resource unit is -2 and the second subcarrier index is 2, the first subcarrier and the second subcarrier can be considered to be continuous.

[0199] Similarly, the "discrete" in the embodiments of the present application refers to the discreteness after the DC subcarrier is removed, or it can be described as that there is at least one subcarrier other than the DC subcarrier between two discrete subcarriers.

[0200] Exemplarily, there is at least one subcarrier with an index in the range of [-122:-2, 2:122] between two discrete subcarriers.

[0201] Optionally, for each group of subcarriers, the number of subcarriers spaced between two discrete subcarriers is greater than or equal to 3.

[0202] Exemplarily, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers spaced between the first subcarrier and the second subcarrier is greater than or equal to 3. Alternatively, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers spaced between the second subcarrier and the third subcarrier is greater than or equal to 3.

[0203] In another example, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers between the first subcarrier and the second subcarrier may be greater than 3 (e.g., 4, 5, etc.). Alternatively, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers between the second subcarrier and the third subcarrier may be greater than 3 (e.g., 4, 5, etc.).

[0204] Optionally, 20 MHz may include 4 first resource units.

[0205] In a first possible design, in the case where the first subcarrier and the second subcarrier are discrete and the second subcarrier and the third subcarrier are continuous, the first subcarrier in the nth group of subcarriers of the four first resource units is continuous, and / or the second subcarrier and the third subcarrier in the nth group of subcarriers of the four first resource units is continuous.

[0206] Where n = 1, 2,…, 17.

[0207] Optionally, the first subcarrier in the nth group of subcarriers of the fourth first resource unit and the second subcarrier in the nth group of subcarriers of the first first resource unit may be continuous or discrete, without limitation.

[0208] For example, the nth group of subcarriers of the first resource unit 1 includes the first subcarrier 1-n-1, the second subcarrier 1-n-2, and the third subcarrier 1-n-3; the nth group of subcarriers of the first resource unit 2 includes the first subcarrier 2-n-1, the second subcarrier 2-n-2, and the third subcarrier 2-n-3; the nth group of subcarriers of the first resource unit 3 includes the first subcarrier 3-n-1, the second subcarrier 3-n-2, and the third subcarrier 3-n-3; the nth group of subcarriers of the first resource unit 4 includes the first subcarrier 4-n-1, the second subcarrier 4-n-2, and the third subcarrier 4-n-3. -2, third subcarrier 4-n-3 as an example, the nth group of subcarriers of the four first resource units can be arranged in order in the frequency domain: continuous (first subcarrier 1-n-1, first subcarrier 2-n-1, first subcarrier 3-n-1, first subcarrier 4-n-1), continuous (second subcarrier 1-n-2, third subcarrier 1-n-3, second subcarrier 2-n-2, third subcarrier 2-n-3, second subcarrier 3-n-2, third subcarrier 3-n-3, second subcarrier 4-n-2, third subcarrier 4-n-3).

[0209] Among them, the first subcarrier 4-n-1 in the nth group of subcarriers of the fourth first resource unit and the second subcarrier 1-n-2 in the nth group of subcarriers of the first first resource unit can be continuous or discrete, without restriction.

[0210] In a second possible design, in the case where the first subcarrier and the second subcarrier are continuous and the second subcarrier and the third subcarrier are discrete, the first subcarrier and the second subcarrier in the nth group of subcarriers of the four first resource units are continuous, and / or the third subcarrier in the nth group of subcarriers of the four first resource units are continuous.

[0211] Where n = 1, 2,…, 17.

[0212] Optionally, the second subcarrier in the nth group of subcarriers of the fourth first resource unit and the third subcarrier in the nth group of subcarriers of the first first resource unit may be continuous or discrete, without limitation.

[0213] For example, the nth group of subcarriers of the first resource unit 1 includes the first subcarrier 1-n-1, the second subcarrier 1-n-2, and the third subcarrier 1-n-3; the nth group of subcarriers of the first resource unit 2 includes the first subcarrier 2-n-1, the second subcarrier 2-n-2, and the third subcarrier 2-n-3; the nth group of subcarriers of the first resource unit 3 includes the first subcarrier 3-n-1, the second subcarrier 3-n-2, and the third subcarrier 3-n-3; the nth group of subcarriers of the first resource unit 4 includes the first subcarrier 4-n-1, the second subcarrier 4-n-2, and the third subcarrier 4-n-3. -2, the third subcarrier 4-n-3 is taken as an example, the nth group of subcarriers of the four first resource units can be arranged in order in the frequency domain: continuous (first subcarrier 1-n-1, second subcarrier 1-n-2, first subcarrier 2-n-1, second subcarrier 2-n-2, first subcarrier 3-n-1, second subcarrier 3-n-2, first subcarrier 4-n-1, second subcarrier 4-n-2), continuous (third subcarrier 1-n-3, third subcarrier 2-n-3, third subcarrier 3-n-3, third subcarrier 4-n-3).

[0214] Among them, the second subcarrier 4-n-2 in the nth group of subcarriers of the fourth first resource unit and the third subcarrier 1-n-3 in the nth group of subcarriers of the first first resource unit can be continuous or discrete, without restriction.

[0215] Based on the above two possible designs, optionally, the third subcarrier in the nth group of subcarriers of the 4th first resource unit and the first subcarrier in the (n+1)th group of subcarriers of the 1st first resource unit can be continuous or discrete, without restriction.

[0216] Based on the above description of the first resource unit, with reference to FIG7 below, the following four possible examples are provided:

[0217] In a first example, the indexes of the subcarriers included in the first resource unit can be: -122, -118, -117, -108, -104, -103, -94, -90, -89, -80, -76, -75, -66, -62, -61, -52, -48, -47, -38, -34, -33, -25, -21, -20, -12, -8, -7, 9, 13, 14, 22, 26, 27, 36, 40, 41, 50, 54, 55, 64, 68, 69, 78, 82, 83, 92, 96, 97, 106, 110, 111, 119.

[0218] In the second example, the indexes of the subcarriers included in the first resource unit can be: -121, -116, -115, -107, -102, -101, -93, -88, -87, -79, -74, -73, -65, -60, -59, -51, -46, -45, -37, -32, -31, -24, -19, -18, -11, -6, -5, 10, 15, 16, 23, 28, 29, 37, 42, 43, 51, 56, 57, 65, 70, 71, 79, 84, 85, 93, 98, 99, 107, 112, 113, 120.

[0219] In a third example, the indexes of the subcarriers included in the first resource unit may be: -120, -114, -113, -106, -100, -99, -92, -86, -85, -78, -72, -71, -64, -58, -57, -50, -44, -43, -36, -30, -29, -23, -17, -16, -10, -4, -3, 11, 17, 18, 24, 30, 31, 38, 44, 45, 52, 58, 59, 66, 72, 73, 80, 86, 87, 94, 100, 101, 108, 114, 115, 121.

[0220] In the fourth example, the indices of the subcarriers included in the first resource unit can be: -119, -112, -111, -105, -98, -97, -91, -84, -83, -77, -70, -69, -63, -56, -55, -49, -42, -41, -35, -28, -27, -22, -15, -14, -9, -2, 2, 12, 19, 20, 25, 32, 33, 39, 46, 47, 53, 60, 61, 67, 74, 75, 81, 88, 89, 95, 102, 103, 109, 116, 117, 122.

[0221] Optionally, 20 MHz may include the four first resource units shown in the four examples in FIG. 7 .

[0222] Optionally, the subcarrier corresponding to the first resource unit may be determined based on the following method:

[0223] Among them, 242 subcarriers can be divided into 18 groups of subcarriers, each group of subcarriers can include 4, 13, 14 or 17 subcarriers, and for each group of subcarriers, 1 single subcarrier and / or 2 consecutive subcarriers can be sequentially allocated to 4 first resource units, and the allocation of 1 single subcarrier and 2 consecutive subcarriers is alternated (the first resource unit can also be described as including alternating single subcarriers and two consecutive subcarriers), and the remaining subcarriers in each group of subcarriers are not allocated.

[0224] For example, as shown in FIG8 , each of the 18 groups of subcarriers in the 1st to 6th, 9th, and 11th to 16th groups of subcarriers may include 14 subcarriers, each of the 7th, 8th, and 17th groups of subcarriers may include 13 subcarriers, the 10th group of subcarriers may include 17 subcarriers, and the 18th group of subcarriers may include 4 subcarriers.

[0225] The first resource unit 1 may include the 1st, 5th, and 6th subcarriers in the 1st-9th and 11th-17th groups of subcarriers, the 5th, 9th, and 10th subcarriers in the 10th group of subcarriers, and the 1st subcarrier in the 18th group of subcarriers.

[0226] The first resource unit 2 may include the 2nd, 7th, and 8th subcarriers in the 1st-9th and 11th-17th groups of subcarriers, the 6th, 11th, and 12th subcarriers in the 10th group of subcarriers, and the 2nd subcarrier in the 18th group of subcarriers.

[0227] The first resource unit 3 may include the 3rd, 9th, and 10th subcarriers in the 1st-9th and 11th-17th groups of subcarriers, the 7th, 13th, and 14th subcarriers in the 10th group of subcarriers, and the 3rd subcarrier in the 18th group of subcarriers.

[0228] The first resource unit 4 may include the 4th, 11th, and 12th subcarriers in the 1st-9th and 11th-17th groups of subcarriers, the 8th, 15th, and 16th subcarriers in the 10th group of subcarriers, and the 4th subcarrier in the 18th group of subcarriers.

[0229] Optionally, the first communication device transmitting OFDM symbols through the first resource unit can be understood as: sending OFDM symbols through the first resource unit, or receiving OFDM symbols through the first resource unit, without limitation.

[0230] Optionally, taking the OFDM symbol as an OFDM symbol of a physical layer protocol data unit (PPDU) as an example, the first communication device can transmit the OFDM symbol corresponding to the long training sequence (LTF) field or data field in the PPDU through the first resource unit.

[0231] It is understandable that some fields of the PPDU (such as the preamble field) may not be transmitted on the first resource unit, but may be transmitted in units of 20 MHz channels.

[0232] Based on the method shown in FIG6 above, a first resource unit designed based on distributed RU technology is provided, which can discretize the limited number of subcarriers into a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect). At the same time, the first resource unit can include two consecutive subcarriers (such as a consecutive second subcarrier and a third subcarrier, or a consecutive first subcarrier and a second subcarrier), which facilitates smoothing of the estimated channel coefficients in channel estimation to obtain a channel smoothing gain, improve the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0233] The maximum power spectral density (PSD) is limited to x mw per 1 MHz. For example, with a subcarrier spacing of 78.125 kHz, 1 MHz can contain 12.8 (approximately 13) subcarriers. Since the average power of each subcarrier is the same during a transmission, the maximum number of signal-carrying subcarriers among any 13 consecutive subcarriers determines the average power per subcarrier, and thus the signal transmit power. For example, in a 20 MHz bandwidth (242 subcarriers), if at most 5 of the 13 consecutive subcarriers carry signals, the average power per subcarrier is x(mw) / 5. If there are 26 signal-carrying subcarriers, the total transmit power is x(mw) / 5*26. If there are 52 signal-carrying subcarriers, the total transmit power is x(mw) / 5*52.

[0234] Based on this, each of the four first resource units provided in the embodiment of the present application can not only achieve a larger power amplification factor, but also obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers, which can improve the system throughput while amplifying the power as much as possible.

[0235] Specifically, the first resource unit provided in the embodiment of the present application has a maximum of 3 signals carried in any 13 subcarriers arranged in frequency domain order, and its power amplification factor can reach 4.3. If you want to get a larger power amplification factor, for a 52-tone DRU, at most 2 signals are carried in any 13 subcarriers arranged in frequency domain order, which requires 52 / 2*13=338 subcarriers, which exceeds the 256 subcarriers of the 20M bandwidth. Therefore, the maximum power amplification factor of the 52-tone DRU is 4.3, that is, the first resource unit provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0236] Based on the first resource units shown in FIG. 5 to FIG. 8 , optionally, the second resource unit may also be determined based on the first resource unit.

[0237] The subcarriers included in the first resource unit are the same as the subcarriers included in the two second resource units. The second resource unit may include the odd-numbered subcarriers in the first resource unit (such as the 1st, 3rd, 5th, 7th, ..., 49th, 51st subcarriers); or, the second resource unit may include the even-numbered subcarriers in the first resource unit (such as the 2nd, 4th, 6th, 8th, ..., 50th, 52nd subcarriers). The second resource unit may also be called a 26-tone DRU.

[0238] For example, taking the first resource unit as the first resource unit shown in Figure 8 above as an example, the second resource unit 1 as shown in Figure 9 can be determined according to the odd-numbered subcarriers in the first resource unit 1, and the second resource unit 2 as shown in Figure 9 can be determined according to the even-numbered subcarriers in the first resource unit 1; the second resource unit 3 as shown in Figure 9 can be determined according to the odd-numbered subcarriers in the first resource unit 2, and the second resource unit 4 as shown in Figure 9 can be determined according to the even-numbered subcarriers in the first resource unit 2; the second resource unit 5 as shown in Figure 9 can be determined according to the odd-numbered subcarriers in the first resource unit 3, and the second resource unit 6 as shown in Figure 9 can be determined according to the even-numbered subcarriers in the first resource unit 3; the second resource unit 7 as shown in Figure 9 can be determined according to the odd-numbered subcarriers in the first resource unit 4, and the second resource unit 8 as shown in Figure 9 can be determined according to the even-numbered subcarriers in the first resource unit 4.

[0239] Among them, the indexes of subcarriers included in the second resource unit 1 can be: -122, -117, -104, -94, -89, -76, -66, -61, -48, -38, -33, -21, -12, -7, 13, 22, 27, 40, 50, 55, 68, 78, 83, 96, 106, 111.

[0240] The indexes of the subcarriers included in the second resource unit 2 can be: -118, -108, -103, -90, -80, -75, -62, -52, -47, -34, -25, -20, -8, 9, 14, 26, 36, 41, 54, 64, 69, 82, 92, 97, 110, 119.

[0241] The indexes of the subcarriers included in the second resource unit 3 can be: -121, -115, -102, -93, -87, -74, -65, -59, -46, -37, -31, -19, -11, -5, 15, 23, 29, 42, 51, 57, 70, 79, 85, 98, 107, 113.

[0242] The indexes of the subcarriers included in the second resource unit 4 can be: -116, -107, -101, -88, -79, -73, -60, -51, -45, -32, -24, -18, -6, 10, 16, 28, 37, 43, 56, 65, 71, 84, 93, 99, 112, 120.

[0243] The indexes of the subcarriers included in the second resource unit 5 can be: -120, -113, -100, -92, -85, -72, -64, -57, -44, -36, -29, -17, -10, -3, 17, 24, 31, 44, 52, 59, 72, 80, 87, 100, 108, 115.

[0244] The indexes of the subcarriers included in the second resource unit 6 can be: -114, -106, -99, -86, -78, -71, -58, -50, -43, -30, -23, -16, -4, 11, 18, 30, 38, 45, 58, 66, 73, 86, 94, 101, 114, 121.

[0245] The indexes of the subcarriers included in the second resource unit 7 can be: -119, -111, -98, -91, -83, -70, -63, -55, -42, -35, -27, -15, -9, 2, 19, 25, 33, 46, 53, 61, 74, 81, 89, 102, 109, 117.

[0246] The indexes of the subcarriers included in the second resource unit 8 can be: -112, -105, -97, -84, -77, -69, -56, -49, -41, -28, -22, -14, -2, 12, 20, 32, 39, 47, 60, 67, 75, 88, 95, 103, 116, 122.

[0247] Optionally, 20 MHz may include the second resource unit 1 to the second resource unit 8 shown in FIG. 9 .

[0248] Optionally, in addition to the above-mentioned 8 second resource units (also referred to as 8 26-tone DRUs), 20MHz may also include another 26-tone DRU (or described as the 9th 26-tone DRU). The 9th 26-tone DRU may include 26 subcarriers corresponding to 20MHz except for the subcarriers corresponding to the above-mentioned 8 second resource units.

[0249] For example, as shown in FIG9 , the indices of the subcarriers included in the 9th 26-tone DRU may be: -110, -109, -96, -95, -82, -81, -68, -67, -54, -53, -40, -39, -26, -13, 7, 8, 21, 34, 35, 48, 49, 62, 63, 76, 77, 90.

[0250] Based on the first resource unit shown in FIG. 5 to FIG. 8 , optionally, a third resource unit may also be determined based on the first resource unit.

[0251] The subcarriers included in the first resource unit are a subset of the subcarriers included in the third resource unit, and the third resource unit may include two first resource units and two single subcarriers. The third resource unit may also be called a 106-tone DRU.

[0252] Exemplarily, the third resource unit may include the first first resource unit (such as the first resource unit 1 above), the third first resource unit (such as the first resource unit 3 above), a single subcarrier with an index of 3, and a single subcarrier with an index of 5. Alternatively, the third resource unit may include the second first resource unit (such as the first resource unit 2 above), the fourth first resource unit (such as the first resource unit 4 above), a single subcarrier with an index of 4, and a single subcarrier with an index of 6.

[0253] Among them, taking the first resource unit as the first resource unit shown in Figure 8 above as an example, as shown in Figure 10, the indexes of the subcarriers included in the third resource unit 1 can be: -122, -120, -118, -117, -114, -113, -108, -106, -104, -103, -100, -99, -94, -92, -90, -89, -86, -85, -80, -78, -76, -75, -72, -71, -66, -64, -62, -61, -58, -57, -52, -50, -48, -47, -44, -43, -38, -36, -34 , -33, -30, -29, -25, -23, -21, -20, -17, -16, -12, -10, -8, -7, -4, -3, 3, 5, 9, 11, 13, 14, 17, 18, 22, 24, 26, 27, 30, 31, 36, 38, 40, 41, 44, 45, 50, 52, 54, 55, 58, 59, 64, 66, 68, 69, 72, 73, 78, 80, 82, 83, 86, 87, 92, 94, 96, 97, 100, 101, 106, 108, 110, 111, 114, 115, 119, 121.

[0254] The indices of the subcarriers included in the third resource unit 2 are: -121, -119, -116, -115, -112, -111, -107, -105, -102, -101, -98, -97, -93, -91, -88, -87, -84, -83, -79, -77, -74, -73, -70, -69, -65, -63, -60, -59, -56, -55, -51, -49, -46, -45, -42, -41, -37, -35, -32, -31, -28, -27, -24, - 22, -19, -18, -15, -14, -11, -9, -6, -5, -2, 2, 4, 6, 10, 12, 15, 16, 19, 20, 23, 25, 28, 29, 32, 33, 37, 39, 42, 43, 46, 47, 51, 53, 56, 57, 60, 61, 65, 67, 70, 71, 74, 75, 79, 81, 84, 85, 88, 89, 93, 95, 98, 99, 102, 103, 107, 109, 112, 113, 116, 117, 120, 122.

[0255] Optionally, 20 MHz may include the third resource unit 1 and the third resource unit 2 shown in FIG. 10 .

[0256] Based on the above description of the first resource unit, optionally, the first resource unit includes 4 discrete pilot subcarriers.

[0257] Among them, when the second subcarrier and the third subcarrier are continuous, the 4 discrete pilot subcarriers are 4 discrete subcarriers among the 17 second subcarriers and 17 third subcarriers corresponding to the first resource unit. Alternatively, when the first subcarrier and the second subcarrier are continuous, the 4 discrete pilot subcarriers are 4 discrete subcarriers among the 17 first subcarriers and 17 second subcarriers corresponding to the first resource unit. That is, each pilot subcarrier in the first resource unit is one of two consecutive subcarriers. By determining the pilot subcarrier as one of two consecutive subcarriers, the combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier, which can make the channel estimation more accurate during the channel estimation process, thereby improving the phase deviation estimation accuracy and reducing the packet error rate.

[0258] Optionally, from the above description of the first resource unit, it can be seen that each first resource unit contains 17 groups of paired subcarriers (i.e., continuous subcarriers). For the four first resource units in 20MHz, the nth group of paired subcarriers is continuous, that is, the nth group of paired subcarriers of the first resource unit 1, the nth group of paired subcarriers of the first resource unit 2, the nth group of paired subcarriers of the first resource unit 3, and the nth group of paired subcarriers of the first resource unit 4 are 8 continuous subcarriers. These 8 continuous subcarriers are called a block, and there are a total of 17 blocks. One pilot subcarrier can be set in each of the 1st to 8th blocks and the 10th to 17th blocks, for a total of 16 pilot subcarriers. Since the 9th block is located on both sides of the DC subcarrier and is easily affected by carrier leakage, no pilot subcarrier is set. These 16 pilot subcarriers can be allocated to the 4 first resource units, and each first resource unit includes 4 pilot subcarriers.

[0259] Among them, by setting a pilot subcarrier in each block, it is possible to avoid the pilot subcarriers of the same / different first resource units being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0260] In the first possible design, when the second subcarrier and the third subcarrier of the first resource unit are continuous, one subcarrier among the four second subcarriers and the four third subcarriers corresponding to the mth group of subcarriers arranged in frequency domain order in the four first resource units is a pilot subcarrier.

[0261] Here, m = 1, 2, ..., 7, 8, 10, 11, ..., 17. The mth group of subcarriers is the aforementioned 1st to 8th blocks and 10th to 17th blocks.

[0262] For example, taking the mth group of subcarriers of the first resource unit 1 including the continuous second subcarrier 1-m-2 and the third subcarrier 1-m-3, the mth group of subcarriers of the first resource unit 2 including the continuous second subcarrier 2-m-2 and the third subcarrier 2-m-3, the mth group of subcarriers of the first resource unit 3 including the continuous second subcarrier 3-m-2 and the third subcarrier 3-m-3, and the mth group of subcarriers of the first resource unit 4 including the continuous second subcarrier 4-m-2 and the third subcarrier 4-m-3 as an example, these four groups of continuous subcarriers can be arranged in the frequency domain order as follows: continuous (second subcarrier 1-m-2, third subcarrier 1-m-3, second subcarrier 2-m-2, third subcarrier 2-m-3, second subcarrier 3-m-2, third subcarrier 3-m-3, second subcarrier 4-m-2, third subcarrier 4-m-3). Among the eight continuous subcarriers, one subcarrier is a pilot subcarrier.

[0263] In a second possible design, when the first subcarrier and the second subcarrier of the first resource unit are continuous, one subcarrier among the four first subcarriers and the four second subcarriers corresponding to the mth group of subcarriers arranged in frequency domain order in the four first resource units is a pilot subcarrier.

[0264] Here, m = 1, 2, ..., 7, 8, 10, 11, ..., 17. The mth group of subcarriers is the aforementioned 1st to 8th blocks and 10th to 17th blocks.

[0265] For example, taking the mth group of subcarriers of the first resource unit 1 including the continuous first subcarrier 1-m-1 and the second subcarrier 1-m-2, the mth group of subcarriers of the first resource unit 2 including the continuous first subcarrier 2-m-1 and the second subcarrier 2-m-2, the mth group of subcarriers of the first resource unit 3 including the continuous first subcarrier 3-m-1 and the second subcarrier 3-m-2, and the mth group of subcarriers of the first resource unit 4 including the continuous first subcarrier 4-m-1 and the second subcarrier 4-m-2 as an example, the mth group of subcarriers of the first resource unit of these four groups of continuous subcarriers can be arranged in the frequency domain order as follows: continuous (first subcarrier 1-m-1, second subcarrier 1-m-2, first subcarrier 2-m-1, second subcarrier 2-m-2, first subcarrier 3-m-1, second subcarrier 3-m-2, first subcarrier 4-m-1, second subcarrier 4-m-2). Among the eight continuous subcarriers, one subcarrier is a pilot subcarrier.

[0266] Optionally, the four pilot subcarriers included in the first resource unit are respectively located in the 1st, 5th, 10th, and 14th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the first resource unit are respectively located in the 2nd, 6th, 11th, and 15th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the first resource unit are respectively located in the 3rd, 7th, 12th, and 16th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the first resource unit are respectively located in the 4th, 8th, 13th, and 17th groups of subcarriers arranged in frequency domain order. This can make the pilot subcarriers more evenly distributed, avoid the pilot subcarriers of the first resource unit being too close, and thus avoid narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0267] Optionally, as shown in Figure 17, the four pilot subcarriers included in the fourth first resource unit (i.e., first resource unit 4) are respectively located in the 1st, 5th, 10th, and 14th groups of subcarriers arranged in frequency domain order. This can reduce the distance between the pilot subcarriers and the guard subcarriers, and make the pilot subcarriers more evenly distributed, thereby avoiding the pilot subcarriers of the first resource unit being too close, thereby avoiding narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0268] Optionally, as shown in Figure 17, the four pilot subcarriers included in the first first resource unit (i.e., first resource unit 1) are respectively located in the 4th, 8th, 13th, and 17th groups of subcarriers arranged in frequency domain order. This can reduce the distance between the pilot subcarriers and the guard subcarriers, and make the pilot subcarriers more evenly distributed, thereby avoiding the pilot subcarriers of the first resource unit being too close, thereby avoiding narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0269] Optionally, as shown in Figure 17, the four pilot subcarriers included in the third first resource unit (i.e., first resource unit 3) are respectively located in the 2nd, 6th, 11th, and 15th groups of subcarriers arranged in frequency domain order, and the four pilot subcarriers included in the second first resource unit (i.e., first resource unit 2) are respectively located in the 3rd, 7th, 12th, and 16th groups of subcarriers arranged in frequency domain order.

[0270] Alternatively, the four pilot subcarriers included in the second first resource unit are respectively located in the 2nd, 6th, 11th and 15th groups of subcarriers arranged in frequency domain order, and the four pilot subcarriers included in the third first resource unit are respectively located in the 3rd, 7th, 12th and 16th groups of subcarriers arranged in frequency domain order.

[0271] Optionally, the two pilot subcarriers in the first resource unit are the odd-numbered subcarriers of the first resource unit, and the other two pilot subcarriers are the even-numbered subcarriers of the first resource unit. Thus, when two second resource units are determined based on the first resource unit, it is ensured that each second resource unit can include two pilot subcarriers. That is, the pilot subcarriers included in the first resource unit are the same as the pilot subcarriers included in the two second resource units, the pilot subcarriers included in the second resource unit are the two pilot subcarriers with odd sorting numbers among the subcarriers of the first resource unit, and the second resource unit is determined based on the odd-numbered subcarriers in the first resource unit; or, the pilot subcarriers included in the second resource unit are the two pilot subcarriers with even sorting numbers among the subcarriers of the first resource unit, and the second resource unit is determined based on the even-numbered subcarriers in the first resource unit.

[0272] In the first example, the indexes of the 256 subcarriers in a 20 MHz bandwidth are [-128:127], and the pilot subcarriers of the fourth first resource unit are located in the 1st, 5th, 10th, and 14th subcarrier groups, respectively. The indexes of the consecutive subcarriers in the 1st, 5th, 10th, and 14th subcarrier groups are: -112, -111, -56, -55, 19, 20, 74, and 75. The order of these 8 subcarriers in the subcarriers of the fourth first resource unit is: 2, 3, 14, 15, 29, 30, 41, and 42, respectively. The sorting numbers of the two pilot subcarriers of the 4th first resource unit among the subcarriers of the 4th first resource unit can be odd numbers, and the sorting numbers of the other two pilot subcarriers among the subcarriers of the 4th first resource unit can be even numbers, so that when two second resource units (such as the second resource unit 7 and the second resource unit 8 shown in Figure 9 above) are determined based on the 4th first resource unit, it is ensured that each second resource unit can include 2 pilot subcarriers.

[0273] Based on this, the indexes of the pilot subcarriers included in the 4th first resource unit are: -112, -56, 19, 74; or, the indexes of the pilot subcarriers included in the 4th first resource unit are: -112, -55, 20, 74; or, the indexes of the pilot subcarriers included in the 4th first resource unit are: -112, -55, 19, 75; or, the indexes of the pilot subcarriers included in the 4th first resource unit are: -111, -56, 20, 74; or, the indexes of the pilot subcarriers included in the 4th first resource unit are: -111, -56, 19, 75; or, the indexes of the pilot subcarriers included in the 4th first resource unit are: -111, -55, 20, 75.

[0274] The indexes of the pilot subcarriers of the two second resource units (second resource unit 7 and second resource unit 8) determined based on the fourth first resource unit are: {-112, -56}, {19, 74}; or: {-112, 20}, {-55, 74}; or: {-112, 75}, {-55, 19}; or: {-111, 74}, {-56, 20}; or: {-111, 19}, {-56, 75}; or: {-111, -55}, {20, 75}.

[0275] In the first example above, when the pilot subcarriers of the first resource unit are {-112, -55, 20, 74} or {-111, -56, 19, 75}, it is more friendly to the two second resource units determined based on the first resource unit, and can make the pilot subcarrier distribution of the two second resource units more uniform, avoiding the pilot subcarriers of the second resource units being too close, and thus avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0276] In the second example, the indexes of 256 subcarriers in a 20M bandwidth are: [-128:127], and the pilot subcarriers of the third first resource unit are located in the 2nd, 6th, 11th, and 15th groups of subcarriers, respectively. The indexes of consecutive subcarriers in the 2nd, 6th, 11th, and 15th groups of subcarriers are: -100, -99, -44, -43, 30, 31, 86, and 87. The order of these 8 subcarriers in the subcarriers of the third first resource unit is: 5, 6, 17, 18, 32, 33, 44, and 45, respectively. The sorting numbers of the two pilot subcarriers of the third first resource unit among the subcarriers of the third first resource unit can be odd numbers, and the sorting numbers of the other two pilot subcarriers among the subcarriers of the third first resource unit can be even numbers, so that when two second resource units (such as the second resource unit 5 and the second resource unit 6 shown in Figure 9 above) are determined based on the third first resource unit, it is ensured that each second resource unit can include 2 pilot subcarriers.

[0277] Based on this, the indexes of the pilot subcarriers included in the third first resource unit are: -99, -43, 31, 87; or, the indexes of the pilot subcarriers included in the third first resource unit are: -99, -44, 30, 87; or, the indexes of the pilot subcarriers included in the third first resource unit are: -99, -44, 31, 86; or, the indexes of the pilot subcarriers included in the third first resource unit are: -100, -43, 30, 87; or, the indexes of the pilot subcarriers included in the third first resource unit are: -100, -43, 31, 86; or, the indexes of the pilot subcarriers included in the third first resource unit are: -100, -44, 30, 86.

[0278] The indexes of the pilot subcarriers of the two second resource units (second resource unit 5 and second resource unit 6) determined based on the third first resource unit are: {-99, -43}, {31, 87}; or: {-99, 30}, {-44, 87}; or: {-99, 86}, {-44, 31}; or: {-43, 30}, {-100, 87}; or: {-43, 86}, {-100, 31}; or: {30, 86}, {-100, -44}.

[0279] In the second example above, when the pilot subcarrier of the first resource unit is {-99, -44, 30, 87} or {-100, -43, 31, 86}, it is more friendly to the two second resource units determined based on the first resource unit, and can make the pilot subcarrier distribution of the two second resource units more uniform, avoiding the pilot subcarriers of the second resource units being too close, and thus avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0280] In the third example, the indexes of 256 subcarriers in a 20M bandwidth are: [-128:127], and the pilot subcarriers of the second first resource unit are located in the 3rd, 7th, 12th, and 16th groups of subcarriers, respectively. The indexes of consecutive subcarriers in the 3rd, 7th, 12th, and 16th groups of subcarriers are: -88, -87, -32, -31, 42, 43, 98, and 99. The order of these 8 subcarriers in the subcarriers of the second first resource unit is: 8, 9, 20, 21, 35, 36, 47, and 48, respectively. The sorting numbers of the two pilot subcarriers of the second first resource unit among the subcarriers of the second first resource unit can be odd numbers, and the sorting numbers of the other two pilot subcarriers among the subcarriers of the second first resource unit can be even numbers, so that when two second resource units (such as the second resource unit 3 and the second resource unit 4 shown in Figure 9 above) are determined based on the second first resource unit, it is ensured that each second resource unit can include 2 pilot subcarriers.

[0281] Based on this, the indexes of the pilot subcarriers included in the second first resource unit are: -88, -32, 42, 98; or, the indexes of the pilot subcarriers included in the second first resource unit are: -88, -31, 43, 98; or, the indexes of the pilot subcarriers included in the second first resource unit are: -88, -31, 42, 99; or, the indexes of the pilot subcarriers included in the second first resource unit are: -87, -32, 43, 98; or, the indexes of the pilot subcarriers included in the second first resource unit are: -87, -32, 42, 99; or, the indexes of the pilot subcarriers included in the second first resource unit are: -87, -31, 43, 99.

[0282] The indexes of the pilot subcarriers of the two second resource units (second resource unit 3 and second resource unit 4) determined based on the second first resource unit are: {-88, -32}, {42, 98}; or: {-88, 43}, {-31, 98}; or: {-88, 99}, {-31, 42}; or: {-32, 43}, {-87, 98}; or: {-32, 99}, {-87, 42}; or: {43, 99}, {-87, -31}.

[0283] In the third example above, when the pilot subcarrier of the first resource unit is {-88, -31, 43, 98} or {-87, -32, 42, 99}, it is more friendly to the two second resource units determined based on the first resource unit, and can make the pilot subcarrier distribution of the two second resource units more uniform, avoiding the pilot subcarriers of the second resource units being too close, and thus avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0284] In the fourth example, the indexes of 256 subcarriers under 20M bandwidth are: [-128:127], and the pilot subcarriers of the first first resource unit are located in the 4th, 8th, 13th, and 17th groups of subcarriers, respectively. The indexes of consecutive subcarriers in the 4th, 8th, 13th, and 17th groups of subcarriers are: -76, -75, -21, -20, 54, 55, 110, and 111. The order of these 8 subcarriers in the subcarriers of the first first resource unit is: 11, 12, 23, 24, 38, 39, 50, and 51, respectively. The sorting numbers of the two pilot subcarriers of the first first resource unit among the subcarriers of the first first resource unit can be odd numbers, and the sorting numbers of the other two pilot subcarriers among the subcarriers of the first first resource unit can be even numbers, so that when two second resource units (such as the second resource unit 1 and the second resource unit 2 shown in Figure 9 above) are determined based on the first first resource unit, it is ensured that each second resource unit can include 2 pilot subcarriers.

[0285] Based on this, the indexes of the pilot subcarriers included in the first resource unit are: -75, -20, 55, 111; or, the indexes of the pilot subcarriers included in the first resource unit are: -75, -21, 54, 111; or, the indexes of the pilot subcarriers included in the first resource unit are: -75, -21, 55, 110; or, the indexes of the pilot subcarriers included in the first resource unit are: -76, -20, 54, 111; or, the indexes of the pilot subcarriers included in the first resource unit are: -76, -20, 55, 110; or, the indexes of the pilot subcarriers included in the first resource unit are: -76, -21, 54, 110.

[0286] The indexes of the pilot subcarriers of the two second resource units (second resource unit 1, second resource unit 2) determined based on the first first resource unit are: {-75, -20}, {55, 111}; or: {-75, 54}, {-21, 111}; or: {-75, 110}, {-21, 55}; or: {-20, 54}, {-76, 111}; or: {-20, 110}, {-76, 55}; or: {54, 110}, {-76, -21}.

[0287] In the fourth example above, when the pilot subcarrier of the first resource unit is {-75, -21, 54, 111} or {76, -20, 55, 110}, it is more friendly to the two second resource units determined based on the first resource unit, and can make the pilot subcarrier distribution of the two second resource units more uniform, avoiding the pilot subcarriers of the second resource units being too close, and thus avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0288] Optionally, in addition to the aforementioned 8 second resource units (second resource unit 1 to second resource unit 8), 20 MHz may also include the aforementioned ninth 26-tone DRU, and the ninth 26-tone DRU may also include two scattered pilot subcarriers.

[0289] Each pilot subcarrier in the ninth 26-tone DRU is one of two consecutive subcarriers, and the pilot subcarriers are discrete. By specifying the pilot subcarrier as one of two consecutive subcarriers, the combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier. This makes the channel estimation more accurate, thereby improving the accuracy of phase deviation estimation and reducing the packet error rate.

[0290] Optionally, a subcarrier in the 9th 26-tone DRU that is away from the DC subcarrier and the protection subcarrier may be determined as a pilot subcarrier.

[0291] Optionally, two subcarriers that are far enough apart in the 9th 26-tone DRU can be used as pilot subcarriers to make the pilot subcarrier distribution more uniform, thereby avoiding the pilot subcarriers of the 9th 26-tone DRU being too close to each other, and further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0292] For example, the 6th and 20th subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, with indexes of -81 and 48. Alternatively, the 7th and 21st subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, with indexes of -68 and 49.

[0293] Optionally, two subcarriers in the 9th 26-tone DRU that meet the following conditions can be determined as pilot subcarriers: they are far away from the DC subcarrier and the protection subcarrier, and the two pilot subcarriers are sufficiently far apart, and the minimum distance between these two pilot subcarriers and any pilot subcarrier in the above-mentioned 8 second resource units is the largest.

[0294] For example, the 8th and 23rd subcarriers of the 9th 26-tone RU can be used as pilot subcarriers with indexes of -67 and 63. This ensures that the minimum distance between the pilot subcarrier of the 9th 26-tone DRU and any pilot subcarrier in the above 8 second resource units (i.e., any other pilot subcarrier within the 20 MHz bandwidth) is the largest, and the minimum distance is 8 or 9.

[0295] Optionally, the pilot subcarrier of the third resource unit may also be determined according to the pilot subcarrier of the first resource unit.

[0296] The pilot subcarriers included in the third resource unit are any four pilot subcarriers among the eight pilot subcarriers included in the corresponding two first resource units.

[0297] Exemplarily, taking the example that the third resource unit 1 includes the first resource unit 1 and the first resource unit 3, the pilot subcarriers included in the first resource unit 1 are any 4 pilot subcarriers among the 8 pilot subcarriers, and the 8 pilot subcarriers include the 4 pilot subcarriers included in the first resource unit 1 and the 4 pilot subcarriers included in the first resource unit 3.

[0298] Optionally, the pilot subcarriers included in the third resource unit are the four pilot subcarriers included in one of the two first resource units. This makes the pilot subcarriers more evenly distributed, avoids the pilot subcarriers of the third resource unit being too close to each other, and further avoids narrowband interference contaminating too many pilot subcarriers, which could cause inaccurate phase offset estimation.

[0299] Exemplarily, the pilot subcarriers included in the 1st third resource unit (i.e., third resource unit 1) may be the 4 pilot subcarriers included in the 1st first resource unit, or the pilot subcarriers included in the 1st third resource unit may be the 4 pilot subcarriers included in the 3rd first resource unit.

[0300] In another example, the pilot subcarriers included in the second third resource unit (i.e., third resource unit 2) may be the four pilot subcarriers included in the second first resource unit, or the pilot subcarriers included in the second third resource unit may be the four pilot subcarriers included in the fourth first resource unit.

[0301] Optionally, the pilot subcarriers of the first third resource unit are the four pilot subcarriers included in the first first resource unit. At the same time, the pilot subcarriers of the second third resource unit are the four pilot subcarriers included in the fourth first resource unit. This can make the spacing between the pilot subcarriers of the two third resource units larger, thereby avoiding the pilot subcarriers of different first resource units being too close, and further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0302] Different from FIG. 6 above, the embodiment of the present application further provides another communication method, as shown in FIG. 11 , which may include:

[0303] Step 1101: A first communication device transmits an OFDM symbol through a second resource unit.

[0304] Among them, the two second resource units may include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers includes a first subcarrier, a second subcarrier and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete.

[0305] Optionally, the second resource unit includes the odd-numbered subcarriers in "the 52 subcarriers after the above 17 groups of subcarriers and 1 single subcarrier are arranged in frequency domain order", or the second resource unit includes the even-numbered subcarriers in "the 52 subcarriers after the above 17 groups of subcarriers and 1 single subcarrier are arranged in frequency domain order".

[0306] Alternatively, it can also be described as: the second resource unit includes the odd-numbered subcarriers in "the above-mentioned 17 groups of subcarriers arranged in frequency domain order and the above-mentioned 1 single subcarrier", or the second resource unit includes the even-numbered subcarriers in "the above-mentioned 17 groups of subcarriers arranged in frequency domain order and the above-mentioned 1 single subcarrier".

[0307] Alternatively, the above-mentioned "17 groups of subcarriers and 1 single subcarrier" can also be considered as the first resource unit, that is, the second resource unit includes the odd-numbered subcarriers in the first resource unit, or the second resource unit includes the even-numbered subcarriers in the first resource unit.

[0308] Optionally, for each group of subcarriers, the number of subcarriers spaced between two discrete subcarriers is greater than or equal to 3.

[0309] Exemplarily, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers spaced between the first subcarrier and the second subcarrier is greater than or equal to 3. Alternatively, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers spaced between the second subcarrier and the third subcarrier is greater than or equal to 3.

[0310] In another example, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers between the first subcarrier and the second subcarrier may be greater than 3 (e.g., 4, 5, etc.). Alternatively, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers between the second subcarrier and the third subcarrier may be greater than 3 (e.g., 4, 5, etc.).

[0311] Optionally, 20 MHz may include 8 second resource units.

[0312] Among them, 8 second resource units can constitute 4 groups of second resource units, and the two second resource units included in each group of second resource units meet the condition that "the two second resource units may include 17 groups of subcarriers and 1 single subcarrier, and each group of subcarriers includes a first subcarrier, a second subcarrier and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete." In a first possible design, in the case where the first subcarrier and the second subcarrier are discrete and the second subcarrier and the third subcarrier are continuous, the first subcarrier in the nth group of subcarriers of the 4 groups of second resource units is continuous, and / or the second subcarrier and the third subcarrier in the nth group of subcarriers of the 4 groups of second resource units are continuous.

[0313] Where n = 1, 2,…, 17.

[0314] Optionally, the first subcarrier in the nth group of subcarriers in the fourth group of second resource units and the second subcarrier in the nth group of subcarriers in the first group of second resource units may be continuous or discrete, without limitation.

[0315] In a second possible design, in the case where the first subcarrier and the second subcarrier are continuous and the second subcarrier and the third subcarrier are discrete, the first subcarrier and the second subcarrier in the nth group of subcarriers of the four groups of second resource units are continuous, and / or the third subcarrier in the nth group of subcarriers of the four groups of second resource units are continuous.

[0316] Where n = 1, 2,…, 17.

[0317] Optionally, the second subcarrier in the nth group of subcarriers in the fourth group of second resource units and the third subcarrier in the nth group of subcarriers in the first group of second resource units may be continuous or discrete, without limitation.

[0318] Based on the above two possible designs, optionally, the third subcarrier in the nth group of subcarriers of the fourth group of second resource units and the first subcarrier in the (n+1)th group of subcarriers of the first group of second resource units can be continuous or discrete, without restriction.

[0319] Based on the above description of the second resource unit, with reference to FIG9 , eight possible examples of the second resource unit 1 to the second resource unit 8 are provided, which are not described in detail here.

[0320] Optionally, 20 MHz includes second resource units 1 to 8 as shown in FIG9 .

[0321] Optionally, the subcarriers corresponding to the four groups of second resource units can be determined based on the following method: 242 subcarriers can be divided into 18 groups of subcarriers, each group of subcarriers can include 4, 13, 14 or 17 subcarriers, and for each group of subcarriers, one single subcarrier and / or two consecutive subcarriers can be sequentially allocated to the four groups of second resource units, and the allocation of one single subcarrier and two consecutive subcarriers is performed alternately (each group of second resource units can also be described as including alternating single subcarriers and two consecutive subcarriers), and the remaining subcarriers in each group of subcarriers are not allocated.

[0322] Among them, the description of the method for determining the subcarriers corresponding to the four groups of second resource units can refer to the relevant description of the method for determining the subcarriers corresponding to the four first resource units, and will not be repeated here.

[0323] Optionally, in addition to the above-mentioned 8 second resource units (also referred to as 8 26-tone DRUs), 20MHz may also include another 26-tone DRU (or described as the 9th 26-tone DRU). The 9th 26-tone DRU may include 26 subcarriers corresponding to 20MHz except for the subcarriers corresponding to the above-mentioned 8 second resource units.

[0324] For example, as shown in FIG9 , the indices of the subcarriers included in the 9th 26-tone DRU may be: -110, -109, -96, -95, -82, -81, -68, -67, -54, -53, -40, -39, -26, -13, 7, 8, 21, 34, 35, 48, 49, 62, 63, 76, 77, 90.

[0325] Optionally, the first communication device transmitting OFDM symbols through the second resource unit can be understood as: sending OFDM symbols through the second resource unit, or receiving OFDM symbols through the second resource unit, without limitation.

[0326] Optionally, taking the OFDM symbol being the OFDM symbol of the PPDU as an example, the first communication device may transmit the OFDM symbol corresponding to the LTF field or the data field in the PPDU through the second resource unit.

[0327] It is understandable that some fields of the PPDU (such as the preamble field) may not be transmitted on the second resource unit, but may be transmitted in units of 20 MHz channels.

[0328] Optionally, similar to the above-mentioned first communication device transmitting OFDM symbols through the second resource unit, the first communication device may also transmit OFDM symbols through the above-mentioned ninth 26-tone DRU, without limitation.

[0329] Based on the second resource unit shown in FIG. 11 , optionally, the first resource unit may also be determined based on the second resource unit.

[0330] The subcarriers included in the second resource unit are a subset of the subcarriers included in the first resource unit, and the first resource unit may include two second resource units, or it may be described that the first resource unit includes the above 17 groups of subcarriers and 1 single subcarrier.

[0331] For example, with reference to Figures 7 and 9 above, the first resource unit 1 may include a first second resource unit (such as the second resource unit 1 above) and a second second resource unit (such as the second resource unit 2 above). The first resource unit 2 may include a third second resource unit (such as the second resource unit 3 above) and a fourth second resource unit (such as the second resource unit 4 above). The first resource unit 3 may include a fifth second resource unit (such as the second resource unit 5 above) and a sixth second resource unit (such as the second resource unit 6 above). The first resource unit 4 may include a seventh second resource unit (such as the second resource unit 7 above) and an eighth second resource unit (such as the second resource unit 8 above).

[0332] Based on the second resource unit shown in FIG. 11 , optionally, a third resource unit may also be determined based on the second resource unit.

[0333] The first resource unit can be determined based on the second resource unit, and the third resource unit can be determined based on the first resource unit. The description of the third resource unit can refer to the relevant description of the third resource unit in Figure 10 above, and will not be repeated here.

[0334] Based on the above second resource unit, optionally, the second resource unit may include 2 discrete pilot subcarriers.

[0335] When the second subcarrier and the third subcarrier are continuous, the four discrete pilot subcarriers included in the two second resource units are four discrete subcarriers among the 17 second subcarriers and the 17 third subcarriers. Alternatively, when the first subcarrier and the second subcarrier are continuous, the four discrete pilot subcarriers included in the two second resource units are four discrete subcarriers among the 17 first subcarriers and the 17 second subcarriers.

[0336] Optionally, 20 MHz may include 8 second resource units, the 8 second resource units may constitute 4 groups of second resource units, and each group of second resource units may include 4 scattered pilot subcarriers.

[0337] Among them, the description of "each group of second resource units includes 4 discrete pilot subcarriers" can refer to the above description of "the first resource unit includes 4 discrete pilot subcarriers", which is not repeated here.

[0338] In the first example, for a group of second resource units (such as second resource unit 7 and second resource unit 8), the indexes of the pilot subcarriers included in one second resource unit are: -112, -56; the indexes of the pilot subcarriers included in another second resource unit are: 19, 74.

[0339] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -112, 20; the indexes of the pilot subcarriers included in another second resource unit are: -55, 74.

[0340] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -112, 75; the indexes of the pilot subcarriers included in another second resource unit are: -55, 19.

[0341] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -111, 74; the indexes of the pilot subcarriers included in another second resource unit are: -56, 20.

[0342] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -111, 19; the indexes of the pilot subcarriers included in another second resource unit are: -56, 75.

[0343] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -111, -55; the indexes of the pilot subcarriers included in another second resource unit are: 20, 75.

[0344] In the second example, for a group of second resource units (such as second resource unit 5 and second resource unit 6), the indexes of the pilot subcarriers included in one second resource unit are: -99, -43; the indexes of the pilot subcarriers included in another second resource unit are: 31, 87.

[0345] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -99, 30; the indexes of the pilot subcarriers included in another second resource unit are: -44, 87.

[0346] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -99, 86; the indexes of the pilot subcarriers included in another second resource unit are: -44, 31.

[0347] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -43, 30; the indexes of the pilot subcarriers included in another second resource unit are: -100, 87.

[0348] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -43, 86; the indexes of the pilot subcarriers included in another second resource unit are: -100, 31.

[0349] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: 30, 86; the indexes of the pilot subcarriers included in another second resource unit are: -100, -44.

[0350] In the third example, for a group of second resource units (such as second resource unit 3 and second resource unit 4), the indexes of the pilot subcarriers included in one second resource unit are: -88, -32; the indexes of the pilot subcarriers included in another second resource unit are: 42, 98.

[0351] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -88, 43; the indexes of the pilot subcarriers included in another second resource unit are: -31, 98.

[0352] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -88, 99; the indexes of the pilot subcarriers included in another second resource unit are: -31, 42.

[0353] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -32, 43; the indexes of the pilot subcarriers included in another second resource unit are: -87, 98.

[0354] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -32, 99; the indexes of the pilot subcarriers included in another second resource unit are: -87, 42.

[0355] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: 43, 99; the indexes of the pilot subcarriers included in another second resource unit are: -87, -31.

[0356] In the fourth example, for a group of second resource units (such as second resource unit 1 and second resource unit 2), the indexes of the pilot subcarriers included in one second resource unit are: -75, -20; the indexes of the pilot subcarriers included in another second resource unit are: 55, 111.

[0357] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -75, 54; the indexes of the pilot subcarriers included in another second resource unit are: -21, 111.

[0358] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -75, 110; the indexes of the pilot subcarriers included in another second resource unit are: -21, 55.

[0359] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -20, 54; the indexes of the pilot subcarriers included in another second resource unit are: -76, 111.

[0360] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -20, 110; the indexes of the pilot subcarriers included in another second resource unit are: -76, 55.

[0361] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: 54, 110; the indexes of the pilot subcarriers included in another second resource unit are: -76, -21.

[0362] Optionally, the pilot subcarrier of the first resource unit may also be determined based on the pilot subcarrier of the second resource unit.

[0363] The pilot subcarriers of a group of second resource units may be determined as the pilot subcarriers of one first resource unit.

[0364] Exemplarily, the pilot subcarriers of the second resource unit 1 and the second resource unit 2 can be determined as the pilot subcarriers of the first resource unit 1, the pilot subcarriers of the second resource unit 3 and the second resource unit 4 can be determined as the pilot subcarriers of the first resource unit 2, the pilot subcarriers of the second resource unit 5 and the second resource unit 6 can be determined as the pilot subcarriers of the first resource unit 3, and the pilot subcarriers of the second resource unit 7 and the second resource unit 8 can be determined as the pilot subcarriers of the first resource unit 4.

[0365] Optionally, the pilot subcarrier of the third resource unit may also be determined according to the pilot subcarrier of the second resource unit.

[0366] The pilot subcarriers of the first resource unit can be determined based on the pilot subcarriers of the second resource unit, and the pilot subcarriers of the third resource unit can be determined based on the pilot subcarriers of the first resource unit. The description of the pilot subcarriers of the third resource unit can refer to the aforementioned description of the pilot subcarriers of the third resource unit and is not repeated here.

[0367] Optionally, in addition to the eight second resource units (second resource unit 1 to second resource unit 8), the 20 MHz may also include the aforementioned ninth 26-tone DRU, and the ninth 26-tone DRU may also include two scattered pilot subcarriers.

[0368] Each pilot subcarrier in the ninth 26-tone DRU is one of two consecutive subcarriers, and the pilot subcarriers are discrete. By specifying the pilot subcarrier as one of two consecutive subcarriers, the combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier. This makes the channel estimation more accurate, thereby improving the accuracy of phase deviation estimation and reducing the packet error rate.

[0369] Optionally, a subcarrier in the 9th 26-tone DRU that is away from the DC subcarrier and the protection subcarrier may be determined as a pilot subcarrier.

[0370] Optionally, two subcarriers that are far enough apart in the 9th 26-tone DRU can be used as pilot subcarriers to make the pilot subcarrier distribution more uniform, thereby avoiding the pilot subcarriers of the 9th 26-tone DRU being too close to each other, and further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0371] For example, the 6th and 20th subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, with indexes of -81 and 48. Alternatively, the 7th and 21st subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, with indexes of -68 and 49.

[0372] Optionally, two subcarriers in the 9th 26-tone DRU that meet the following conditions can be determined as pilot subcarriers: they are far away from the DC subcarrier and the protection subcarrier, and the two pilot subcarriers are sufficiently far apart, and the minimum distance between these two pilot subcarriers and any pilot subcarrier in the above-mentioned 8 second resource units is the largest.

[0373] For example, the 8th and 23rd subcarriers of the 9th 26-tone RU can be used as pilot subcarriers with indexes of -67 and 63. This ensures that the minimum distance between the pilot subcarrier of the 9th 26-tone DRU and any pilot subcarrier in the above 8 second resource units (i.e., any other pilot subcarrier within the 20 MHz bandwidth) is the largest, and the minimum distance is 8 or 9.

[0374] Different from FIG. 6 or FIG. 11 above, the embodiment of the present application further provides another communication method, as shown in FIG. 12 , which may include:

[0375] Step 1201: A first communication device transmits an OFDM symbol through a third resource unit.

[0376] The third resource unit can include 17 groups of subcarriers and 4 single subcarriers. Each group of subcarriers includes the fourth subcarrier, fifth subcarrier, sixth subcarrier, seventh subcarrier, eighth subcarrier, and ninth subcarrier arranged in frequency domain order. The fourth subcarrier and the fifth subcarrier are discrete, the fifth subcarrier and the sixth subcarrier are discrete, the sixth subcarrier and the seventh subcarrier are continuous, the seventh subcarrier and the eighth subcarrier are discrete, and the eighth subcarrier and the ninth subcarrier are continuous. This third resource unit can also be called a 106-tone DRU.

[0377] Optionally, for each group of subcarriers, the number of subcarriers spaced between two discrete subcarriers is greater than or equal to 1, and / or the number of subcarriers spaced between two discrete subcarriers is greater than or equal to 2.

[0378] Illustratively, the number of subcarriers spaced between the fourth subcarrier and the fifth subcarrier may be equal to 1, or greater than 1 (e.g., 2, 3, 4, etc.). And / or the number of subcarriers spaced between the fifth subcarrier and the sixth subcarrier may be equal to 1, or greater than 1 (e.g., 2, 3, 4, etc.). And / or the number of subcarriers spaced between the seventh subcarrier and the eighth subcarrier may be equal to 2, or greater than 2 (e.g., 3, 4, 5, etc.).

[0379] Optionally, 20 MHz may include 2 third resource units.

[0380] Optionally, the fourth subcarriers in the nth group of subcarriers of the two third resource units are continuous, and / or, the fifth subcarriers in the nth group of subcarriers of the two third resource units are continuous, and / or, the sixth subcarrier and the seventh subcarrier in the nth group of subcarriers of the two third resource units are continuous, and / or, the eighth subcarrier and the ninth subcarrier in the nth group of subcarriers of the two third resource units are continuous.

[0381] Where n = 1, 2,…, 17.

[0382] Optionally, the fourth subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the fifth subcarrier in the nth group of subcarriers of the first third resource unit; and / or, the fifth subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the sixth subcarrier in the nth group of subcarriers of the first third resource unit; and / or, the seventh subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the eighth subcarrier in the nth group of subcarriers of the first third resource unit.

[0383] Optionally, the ninth subcarrier in the nth group of subcarriers of the second third resource unit and the fourth subcarrier in the (n+1)th group of subcarriers of the first third resource unit may be continuous or discrete, without limitation.

[0384] Based on the above description of the third resource unit, with reference to Figure 10 above, two possible examples of the third resource unit 1 and the third resource unit 2 are provided, wherein the third resource unit 1 may include 17 groups of subcarriers and 4 single subcarriers, and the 4 single subcarriers may be subcarriers indexed as 3, 5, 119, and 121; the third resource unit 2 may include 17 groups of subcarriers and 4 single subcarriers, and the 4 single subcarriers may be subcarriers indexed as 4, 6, 120, and 122.

[0385] Optionally, the subcarrier corresponding to the third resource unit can be determined based on the following method: 242 subcarriers can be divided into 18 groups of subcarriers, each group of subcarriers can include 4, 13, 14 or 17 subcarriers, and for each group of subcarriers, 1 single subcarrier, 1 single subcarrier, 2 consecutive subcarriers, and 2 consecutive subcarriers can be allocated in sequence to 2 third resource units (such as the third resource unit 1 corresponds to the solid arrow, and the third resource unit 2 corresponds to the dotted arrow), and the allocation of single subcarriers and 2 consecutive subcarriers is performed alternately (the third resource unit can also be described as including 2 alternating single subcarriers and two groups of 2 consecutive subcarriers), and the remaining subcarriers in each group of subcarriers are not allocated.

[0386] For example, as shown in FIG8 , each of the 18 groups of subcarriers in the 1st to 6th, 9th, and 11th to 16th groups of subcarriers may include 14 subcarriers, each of the 7th, 8th, and 17th groups of subcarriers may include 13 subcarriers, the 10th group of subcarriers may include 17 subcarriers, and the 18th group of subcarriers may include 4 subcarriers.

[0387] Among them, the third resource unit 1 can include the 1st, 3rd, 5th, 6th, 9th, and 10th subcarriers in the 1st-9th and 11th-17th groups of subcarriers, the 5th, 7th, 9th, 10th, 13th, and 14th subcarriers in the 10th group of subcarriers, and the 1st and 3rd subcarriers in the 18th group of subcarriers.

[0388] The third resource unit 2 may include the 2nd, 4th, 7th, 8th, 11th, and 12th subcarriers in the 1st-9th and 11th-17th groups of subcarriers, the 6th, 8th, 11th, 12th, 15th, and 16th subcarriers in the 10th group of subcarriers, and the 2nd and 4th subcarriers in the 18th group of subcarriers.

[0389] Optionally, the first communication device transmitting OFDM symbols through the third resource unit can be understood as: sending OFDM symbols through the third resource unit, or receiving OFDM symbols through the third resource unit, without limitation.

[0390] Optionally, taking the OFDM symbol being the OFDM symbol of the PPDU as an example, the first communication device may transmit the OFDM symbol corresponding to the LTF field or the data field in the PPDU through the third resource unit.

[0391] It is understandable that some fields of the PPDU (such as the preamble field) may not be transmitted on the third resource unit, but may be transmitted in units of 20 MHz channels.

[0392] Based on the third resource unit shown in FIG. 12 , optionally, the first resource unit can also be determined based on the third resource unit.

[0393] The subcarriers included in the third resource unit may include two subcarriers included in the first resource units, the first resource unit includes 17 groups of subcarriers and 1 single subcarrier; each group of subcarriers includes a fourth subcarrier, a sixth subcarrier and a seventh subcarrier arranged in frequency domain order; the fourth subcarrier and the sixth subcarrier are discrete; or, each group of subcarriers includes a fifth subcarrier, an eighth subcarrier and a ninth subcarrier arranged in frequency domain order; the fifth subcarrier and the eighth subcarrier are discrete.

[0394] Exemplarily, the first resource unit 1 may include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers including the fourth, sixth, and seventh subcarriers arranged in frequency domain order in the third resource unit 1, with the fourth and sixth subcarriers being discrete. The first resource unit 3 may include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers including the fifth, eighth, and ninth subcarriers arranged in frequency domain order in the third resource unit 1; the fifth and eighth subcarriers being discrete. The first resource unit 2 may include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers including the fourth, sixth, and seventh subcarriers arranged in frequency domain order in the third resource unit 2; the fourth and sixth subcarriers being discrete. The first resource unit 4 may include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers including the fifth, eighth, and ninth subcarriers arranged in frequency domain order in the third resource unit 2; the fifth and eighth subcarriers being discrete. For details, please refer to the first resource unit shown in FIG. 7 above, and detailed description is omitted here.

[0395] Based on the second resource unit shown in FIG. 12 , optionally, the second resource unit can also be determined based on the third resource unit.

[0396] The first resource unit can be determined based on the third resource unit, and the second resource unit can be determined based on the first resource unit. The description of the second resource unit can refer to the relevant description of the second resource unit in Figure 9 above, and will not be repeated here.

[0397] Based on the above third resource unit, optionally, the third resource unit may include 4 discrete pilot subcarriers.

[0398] Among them, the four discrete pilot subcarriers are four discrete subcarriers among the 17 sixth subcarriers, 17 seventh subcarriers, 17 eighth subcarriers, and 17 ninth subcarriers. That is, each pilot subcarrier in the third resource unit is one of two consecutive subcarriers. By determining the pilot subcarrier as one of two consecutive subcarriers, the combining gain of the consecutive subcarriers can be obtained at the pilot subcarrier. During the channel estimation process, the channel estimation can be made more accurate, thereby improving the accuracy of phase deviation estimation and reducing the packet error rate.

[0399] Optionally, from the above description of the third resource unit, it can be seen that each third resource unit contains 17 groups of paired subcarriers (i.e., continuous subcarriers), and each group of subcarriers includes 2 paired subcarriers. For the two third resource units in 20MHz, the nth group of paired subcarriers is continuous, that is, the nth group of paired subcarriers of the third resource unit 1 and the nth group of paired subcarriers of the third resource unit 2 are 8 continuous subcarriers. These 8 continuous subcarriers are called a block, and there are 17 blocks in total. One subcarrier can be selected from blocks 1 to 8 and blocks 10 to 17 as a candidate pilot subcarrier, for a total of 16 candidate pilot subcarriers. Since block 9 is located on both sides of the DC subcarrier and is easily affected by carrier leakage, no pilot subcarrier is set. 4 of the 16 candidate pilot subcarriers can be used as pilot subcarriers of the third resource unit, that is, each third resource unit can include 4 pilot subcarriers.

[0400] Among them, by setting a candidate pilot subcarrier in each block, it is possible to avoid the pilot subcarriers of the same / different third resource units being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase offset estimation.

[0401] Optionally, the four discrete pilot subcarriers are four discrete subcarriers among the 17 sixth subcarriers and the 17 seventh subcarriers. Alternatively, the four discrete pilot subcarriers are four discrete subcarriers among the 17 eighth subcarriers and the 17 ninth subcarriers.

[0402] Exemplarily, the four pilot subcarriers included in the third resource unit are respectively located in the 1st, 5th, 10th, and 14th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the third resource unit are respectively located in the 2nd, 6th, 11th, and 15th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the third resource unit are respectively located in the 3rd, 7th, 12th, and 16th groups of subcarriers arranged in frequency domain order; or, the four pilot subcarriers included in the third resource unit are respectively located in the 4th, 8th, 13th, and 17th groups of subcarriers arranged in frequency domain order. This can make the pilot subcarriers more evenly distributed, avoid the pilot subcarriers of the third resource unit being too close to each other, and thus avoid narrowband interference from contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0403] In the first example, taking the indexes of 256 subcarriers under 20M bandwidth as: [-128:127], and the 4 pilot subcarriers included in the third resource unit are respectively located in the 1st, 5th, 10th and 14th groups of subcarriers arranged in frequency domain order, the indexes of the pilot subcarriers included in the third resource unit are: -112, -56, 19, 74; or, the indexes of the pilot subcarriers included in the third resource unit are: -112, -55, 20, 74; or, the indexes of the pilot subcarriers included in the third resource unit are: -112, -55, 19, 75; or, the indexes of the pilot subcarriers included in the third resource unit are: -111, -56, 20, 74; or, the indexes of the pilot subcarriers included in the third resource unit are: -111, -56, 19, 75; or, the indexes of the pilot subcarriers included in the third resource unit are: -111, -55, 20, 75.

[0404] In the second example, taking the indexes of 256 subcarriers under 20M bandwidth as: [-128:127], and the 4 pilot subcarriers included in the third resource unit are respectively located in the 2nd, 6th, 11th and 15th groups of subcarriers arranged in frequency domain order, the indexes of the pilot subcarriers included in the third resource unit are: -99, -43, 31, 87; or, the indexes of the pilot subcarriers included in the third resource unit are: -99, -44, 30, 87; or, the indexes of the pilot subcarriers included in the third resource unit are: -99, -44, 31, 86; or, the indexes of the pilot subcarriers included in the third resource unit are: -100, -43, 30, 87; or, the indexes of the pilot subcarriers included in the third resource unit are: -100, -43, 31, 86; or, the indexes of the pilot subcarriers included in the third resource unit are: -100, -44, 30, 86.

[0405] In the third example, taking the indexes of 256 subcarriers under 20M bandwidth as: [-128:127], and the 4 pilot subcarriers included in the third resource unit are respectively located in the 3rd, 7th, 12th and 16th groups of subcarriers arranged in frequency domain order, the indexes of the pilot subcarriers included in the third resource unit are: -88, -32, 42, 98; or, the indexes of the pilot subcarriers included in the third resource unit are: -88, -31, 43, 98; or, the indexes of the pilot subcarriers included in the third resource unit are: -88, -31, 42, 99; or, the indexes of the pilot subcarriers included in the third resource unit are: -87, -32, 43, 98; or, the indexes of the pilot subcarriers included in the third resource unit are: -87, -32, 42, 99; or, the indexes of the pilot subcarriers included in the third resource unit are: -87, -31, 43, 99.

[0406] In the fourth example, taking the indexes of 256 subcarriers under 20M bandwidth as: [-128:127], and the 4 pilot subcarriers included in the third resource unit are respectively located in the 4th, 8th, 13th and 17th groups of subcarriers arranged in frequency domain order, the indexes of the pilot subcarriers included in the third resource unit are: -75, -20, 55, 111; or, the indexes of the pilot subcarriers included in the third resource unit are: -75, -21, 54, 111; or, the indexes of the pilot subcarriers included in the third resource unit are: -75, -21, 55, 110; or, the indexes of the pilot subcarriers included in the third resource unit are: -76, -20, 54, 111; or, the indexes of the pilot subcarriers included in the third resource unit are: -76, -20, 55, 110; or, the indexes of the pilot subcarriers included in the third resource unit are: -76, -21, 54, 110.

[0407] Optionally, based on the above description of the third resource unit, the pilot subcarriers of the first resource unit can also be determined based on the above 16 pilot subcarriers, and each first resource unit includes 4 pilot subcarriers. For details, please refer to the above description of the pilot subcarriers of the first resource unit, which is not repeated here.

[0408] Optionally, the pilot subcarriers of the second resource unit may also be determined based on the above 16 pilot subcarriers.

[0409] Among them, the pilot subcarriers of the first resource unit can be determined based on the above 16 pilot subcarriers, and the pilot subcarriers of the second resource unit can be determined based on the pilot subcarriers of the first resource unit. For details, please refer to the above description of the pilot subcarriers of the second resource unit, which will not be repeated here.

[0410] Optionally, in addition to the eight second resource units (second resource unit 1 to second resource unit 8), the 20 MHz may also include the aforementioned ninth 26-tone DRU, and the ninth 26-tone DRU may also include two scattered pilot subcarriers.

[0411] Each pilot subcarrier in the ninth 26-tone DRU is one of two consecutive subcarriers, and the pilot subcarriers are discrete. By specifying the pilot subcarrier as one of two consecutive subcarriers, the combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier. This makes the channel estimation more accurate, thereby improving the accuracy of phase deviation estimation and reducing the packet error rate.

[0412] Optionally, a subcarrier in the 9th 26-tone DRU that is away from the DC subcarrier and the protection subcarrier may be determined as a pilot subcarrier.

[0413] Optionally, two subcarriers that are far enough apart in the 9th 26-tone DRU can be used as pilot subcarriers to make the pilot subcarrier distribution more uniform, thereby avoiding the pilot subcarriers of the 9th 26-tone DRU being too close to each other, and further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0414] For example, the 6th and 20th subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, with indexes of -81 and 48. Alternatively, the 7th and 21st subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, with indexes of -68 and 49.

[0415] Optionally, two subcarriers in the 9th 26-tone DRU that meet the following conditions can be determined as pilot subcarriers: they are far away from the DC subcarrier and the protection subcarrier, and the two pilot subcarriers are sufficiently far apart, and the minimum distance between these two pilot subcarriers and any pilot subcarrier in the above-mentioned 8 second resource units is the largest.

[0416] For example, the 8th and 23rd subcarriers of the 9th 26-tone RU can be used as pilot subcarriers with indexes of -67 and 63. This ensures that the minimum distance between the pilot subcarrier of the 9th 26-tone DRU and any pilot subcarrier in the above 8 second resource units (i.e., any other pilot subcarrier within the 20 MHz bandwidth) is the largest, and the minimum distance is 8 or 9.

[0417] The first resource unit designed based on the distributed RU technology in each embodiment shown in Figures 6 to 12 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above four first resource units can achieve a larger power amplification factor. At the same time, each first resource unit can include two consecutive subcarriers, which is convenient for smoothing the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0418] In the various embodiments shown in Figures 6 to 12 above, the second resource unit and the ninth 26-tone DRU designed based on the distributed RU technology can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above-mentioned eight second resource units and the ninth 26-tone DRU can achieve a larger power amplification factor. At the same time, the ninth 26-tone DRU can include two consecutive subcarriers, which facilitates smoothing of the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (e.g., a channel smoothing gain of approximately 2 / 3 of the subcarriers can be obtained), thereby improving the accuracy of channel estimation, thereby improving the packet error rate, and improving the system throughput.

[0419] Specifically, the second resource unit and the ninth 26-tone DRU provided in the embodiment of the present application have a maximum of two signals carried in any 13 subcarriers arranged in frequency domain order, and their power amplification factor can reach 6.5. If you want to get a larger power amplification factor, for the 26-tone DRU, at most one signal is carried in any 13 subcarriers arranged in frequency domain order, which requires 26 / 1*13=338 subcarriers, which exceeds the 256 subcarriers of the 20M bandwidth, so the maximum power amplification factor of the 26-tone DRU is 6.5, that is, the second resource unit and the ninth 26-tone DRU provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0420] The third resource unit designed based on the distributed RU technology in each embodiment shown in Figures 6 to 12 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the two third resource units mentioned above can achieve a larger power amplification factor. At the same time, each third resource unit can include two consecutive subcarriers, which facilitates smoothing of the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0421] It can be understood that in each embodiment shown in FIG. 6 to FIG. 12 , the maximum power gain (or power per subcarrier) of the second resource unit and the ninth 26-tone DRU is higher than that of the first resource unit and the third resource unit.

[0422] Specifically, the third resource unit provided in the embodiment of the present application has a maximum of 6 signals carried in any 13 consecutive subcarriers arranged in frequency domain order, and its power amplification factor can reach 2.17. If you want to get a larger power amplification factor, for a 106-tone DRU, at most 5 of the 13 consecutive subcarriers carry signals, which requires 106 / 5*13=275.6 subcarriers, which exceeds the 256 subcarriers of the 20M bandwidth. Therefore, the maximum power amplification factor of the 106-tone DRU is 2.17, that is, the third resource unit provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0423] The DRU described in the methods described in Figures 6 to 12 above can be used for transmission of downlink OFDMA PPDU. For example, the AP sends the downlink OFDMA PPDU according to the DRU described in the methods described in Figures 6 to 12 above; accordingly, the STA receives the downlink OFDMA PPDU according to the DRU described in the methods described in Figures 6 to 12 above.

[0424] The DRU described in the methods described in Figures 6 to 12 above can also be used for the transmission of uplink OFDMA PPDU / TB PPDU. For example, the AP sends a trigger frame, and the STA sends the TB PPDU based on the resources allocated by the trigger frame and the DRU described in the methods described in Figures 6 to 12 above; accordingly, the AP receives the TB PPDU based on the DRU described in the methods described in Figures 6 to 12 above.

[0425] For example, as shown in Figure 14, taking the uplink multi-user transmission scenario as an example, the AP can send a trigger frame as shown in Figure 13 to the STA. The trigger frame carries the STA's identifier information and resource allocation information, where the User Info List field contains instruction information sent to different users, and each STA processes its own part. After receiving the trigger frame, the STA can use the TB PPDU to send uplink data frames on the corresponding resource unit and receive the BA frame sent by the AP after SIFS. Discrete RUs are sent by multiple users interspersed to increase the transmit power of each user under certain bandwidth conditions.

[0426] Specifically, the trigger frame may include resource scheduling parameters and other parameters for one or more first communication devices to transmit a PPDU. As shown in Figure 13, the trigger frame may include a frame control field, a duration field, a receiving address (RA) field, a sending address (SA) field, a common information field, a user information list field, a padding field, and a frame check sequence (FCS) field. For a detailed description of each field in the trigger frame, please refer to the corresponding description in the 802.11ax standard or the 802.11be standard and will not be elaborated here.

[0427] The public information field may include public information that each first communication device needs to read. The user information list field may include one or more user information fields, each user information field containing information that each first communication device needs to read. The user information field may include fields such as an association identification 12 (AID12) field and a resource unit allocation (RU allocation) subfield. The association identification field may be used to indicate the association identification of a certain receiving end communication device, and the resource unit allocation subfield may be used to indicate the location of the resource unit allocated to the first communication device (i.e., the first communication device indicated by AID12).

[0428] Exemplarily, taking the 802.11be standard as an example, in the user information field in the EHT form, the resource unit allocated to the first communication device (including RU, DRU or multiple resource units (multiple resource unit, MRU) composed of multiple resource units) can be indicated by the following subfields: resource unit allocation subfield (RU Allocation subfield), uplink bandwidth subfield (UL BW subfield) in the common information field, uplink bandwidth extension subfield (UL BW Extension subfield) in the special user information field, and master-slave 160 subfield (PS160 subfield).

[0429] In the common information field, B55 indicates whether a special user information field exists in the user information field. For an EHT TB PPDU, its bandwidth is determined by the uplink bandwidth subfield and the uplink bandwidth extension subfield in the special user information field. The mapping relationship between B0 in the resource unit allocation subfield, B7-B1 in the resource unit allocation subfield, and PS160 can be shown in Table 3 below:

[0430] The bandwidth (band width) can be determined by the uplink bandwidth subfield and the uplink bandwidth extension subfield. N can be obtained by the formula: N = 2 × X1 + X0. The values ​​of X1 and X0 can be found in Table 4 below. Table 4 describes the conversion of logical parameters PS160 and B0 to physical parameters X1 and X0. The frequency band configuration in Table 4 refers to the order of P80, S80, and S160 in absolute frequency, representing from low frequency to high frequency from left to right. P80 represents the primary 80 MHz channel, S80 represents the secondary 80 MHz channel, and S160 represents the secondary 160 MHz channel.

[0431] Table 3

[0432] Table 4

[0433] This application also provides the following technical solutions:

[0434] (1) A new design of a 20 MHz tone plan, including a new design of a guard subcarrier in the 20 MHz tone plan, a new design of a DRU in the 20 MHz tone plan, and a new design of a pilot subcarrier in the newly designed DRU.

[0435] Except for the specific number and position of guard tones, subcarrier index of DRU, and pilot subcarrier index in DRU, the 20MHz tone plan has the same features as the 20MHz tone plan in the above embodiments. plan, such as "the first resource unit includes 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete", "the subcarriers included in the first resource unit are the same as the subcarriers included in two second resource units, and the second resource unit includes the odd-numbered subcarriers in the first resource unit; or, the second resource unit includes the even-numbered subcarriers in the first resource unit", and "the subcarriers included in the first resource unit are a subset of the subcarriers included in the third resource unit, and the third resource unit includes two first resource units and two single subcarriers".

[0436] Specifically, the 20MHz Tone Plan in each of the above embodiments includes 11 protection subcarriers, of which 6 protection subcarriers are located in the low-frequency edge area of ​​20MHz, and 5 protection subcarriers are located in the high-frequency edge area of ​​20MHz. The new 20MHz tone plan in this technical solution includes 15 protection subcarriers, of which 8 protection subcarriers are located in the low-frequency edge area of ​​20MHz, and 7 protection subcarriers are located in the high-frequency edge area of ​​20MHz; the advantage of increasing the number of protection subcarriers is that it makes it easier for the transmitted signal to conform to the spectrum template, which is more friendly to the design of the transceiver filter and can also reduce interference to adjacent channels. Compared with the 20MHz tone plan in each of the above embodiments, the subcarrier index and pilot subcarrier index of the DRU of the new 20MHz tone plan are shifted, but its hierarchical structure (the inclusion relationship of each DRU) and the maximum power gain remain unchanged.

[0437] For example, as shown in FIG18 , the 14th subcarrier of the 1st group and the 14th subcarrier of the 2nd group can be shifted to the low-frequency edge area of ​​20 MHz as protection subcarriers, and the 14th subcarrier of the 11th group and the 14th subcarrier of the 12th group can be shifted to the high-frequency edge area of ​​20 MHz as protection subcarriers. Accordingly, after the shift, the subcarrier indexes of the DRU of the new 20 MHz tone plan can be shown in Tables 5, 6, and 7 below, respectively.

[0438] Table 5

[0439] Table 6

[0440] Table 7

[0441] At the same time, the pilot subcarrier index of the DRU of the new 20MHz tone plan is as follows:

[0442] As shown in Figure 18, the pilot subcarriers of the fourth 52-tone DRU (i.e., the first resource unit 4) are included in the paired subcarriers of groups 1, 5, 10, and 14. The paired subcarrier indexes of groups 1, 5, 10, and 14 are -110, -109, -56, -55, 19, 20, 72, and 73. The subcarrier index here refers to the index [-128:127] of the 256 subcarriers in a 20MHz bandwidth. Their sequence numbers in the fourth 52-tone DRU are 2, 3, 14, 15, 29, 30, 41, and 42. Since the 52-tone DRU will continue to be split into two 26-tone DRUs, the specific splitting method is that its odd-numbered subcarriers and its even-numbered subcarriers each constitute a 26-tone DRU. To ensure that each 26-tone DRU receives two pilot subcarriers, two of the 52-tone DRU pilot subcarrier numbers must be odd and two must be even. Furthermore, considering the requirement to select one pilot subcarrier from each pair of subcarriers, there are six groups of eligible pilot subcarrier indices: {-110 -56 19 72}, {-110 -55 20 72}, {-110 -55 19 73}, {-109 -56 20 72}, {-109 -56 19 73}, and {-109 -55 20 73}. Correspondingly, the pilot subcarrier indices of the two split 26-tone DRUs are {-110 -56} / {19 72}, {-110 20} / {-55 72}, {-110 73} / {-55 19}, {-109 72} / {-56 20}, {-109 19} / {-56 73}, and {-109 -55} / {20 73}, respectively. {-110 -55 20 72} and {-109 -56 19 73} are more friendly to the two split 26-tone DRUs, making the pilot distribution of the two split 26-tone DRUs more uniform.

[0443] As shown in Figure 18, the pilot subcarriers of the third 52-tone DRU (i.e., first resource unit 3) are included in the paired subcarriers of groups 2, 6, 11, and 15. The paired subcarriers of groups 2, 6, 11, and 15 are indexed as -99, -98, -44, -43, 30, 31, 84, and 85. Their sequence numbers in the third 52-tone DRU are 5, 6, 17, 18, 32, 33, 44, and 45. Taking into account that one subcarrier in each pair of subcarriers is taken as a pilot subcarrier, and the sequence number of the pilot subcarrier in the 52-tone DRU is 2 odd numbers and 2 even numbers, there are 6 groups of qualified pilot subcarrier indexes, including {-98 -43 31 85}, {-98 -44 30 85}, {-98 -44 31 84}, {-99 -43 30 85}, {-99 -43 31 84}, and {-99 -44 30 84}. Correspondingly, the pilot subcarrier indices of the two split 26-tone DRUs are {-98 -43} / {31 85}, {-98 30} / {-44 85}, {-98 84} / {-44 31}, {-43 30} / {-99 85}, {-43 84} / {-99 31}, and {30 84} / {-99 -44}, respectively. {-98 -44 30 85} and {-99 -43 31 84} are more friendly to the two split 26-tone DRUs, making the pilot distribution of the two split 26-tone DRUs more uniform.

[0444] As shown in Figure 18, the pilot subcarriers of the second 52-tone DRU (i.e., first resource unit 2) are included in the paired subcarriers of groups 3, 7, 12, and 16. The paired subcarriers of groups 3, 7, 12, and 16 are indexed as -88, -87, -32, -31, 41, 42, 96, and 97. Their sequence numbers in the second 52-tone DRU are 8, 9, 20, 21, 35, 36, 47, and 48. Taking into account that one subcarrier in each pair of subcarriers is taken as a pilot subcarrier, and the sequence number of the pilot subcarrier in the 52-tone DRU is 2 odd numbers and 2 even numbers, there are 6 groups of qualified pilot subcarrier indexes, including {-88 -32 41 96}, {-88 -31 42 96}, {-88 -31 41 97}, {-87 -32 42 96}, {-87 -32 41 97}, and {-87 -31 42 97}. Correspondingly, the pilot subcarrier indices of the two split 26-tone DRUs are {-88 -32}\{4196}, {-88 42}\{-31 96}, {-88 97}\{-31 41}, {-32 42}\{-87 96}, {-32 97}\{-87 41}, and {42 97}\{-87 -31}, respectively. {-88 -31 42 96} and {-87 -32 41 97} are more friendly to the two split 26-tone DRUs, making the pilot distribution of the two split 26-tone DRUs more uniform.

[0445] As shown in Figure 18, the pilot subcarriers of the first 52-tone DRU (i.e., the first resource unit 1) are included in the paired subcarriers of groups 4, 8, 13, and 17. The paired subcarriers of groups 3, 7, 12, and 16 are indexed as -76, -75, -21, -20, 52, 53, 108, and 109. Their sequence numbers in the first 52-tone DRU are 11, 12, 23, 24, 38, 39, 50, and 51. Taking into account that one subcarrier in each pair of subcarriers is taken as a pilot subcarrier, and the sequence number of the pilot subcarrier in the 52-tone DRU is 2 odd numbers and 2 even numbers, there are 6 groups of qualified pilot subcarrier indexes, including {-75 -20 53 109}, {-75 -21 52 109}, {-75 -21 53 108}, {-76 -20 52 109}, {-76 -20 53 108}, and {-76 -21 52 108}. Correspondingly, the pilot subcarrier indices of the two split 26-tone DRUs are {-75 -20} / {53 109}, {-75 52} / {-21 109}, {-75 108} / {-21 53}, {-20 52} / {-76 109}, {-20 108} / {-76 53}, and {52 108} / {-76 -21}, respectively. {-75 -21 52 109} and {-76 -20 53 108} are more friendly to the two split 26-tone DRUs, making the pilot distribution of the two split 26-tone DRUs more uniform.

[0446] For the 9th 26-tone DRU that is not included in any 52-tone DRU, it contains two pilot subcarriers, each pilot subcarrier is one of a pair of continuous subcarriers, and the two pilot subcarriers do not form a pair. In order to ensure that the position of the pilot subcarrier is far away from the DC subcarrier and the protection subcarrier, and the two pilot subcarriers are far enough apart, and the minimum distance between these two subcarriers and any other pilot subcarriers is the largest, the 6th and 19th subcarriers of the 9th 26-tone RU can be selected as pilot subcarriers, and their indexes are -67 and 61. This selection can ensure that the minimum distance between the pilot subcarrier of the 9th 26-tone DRU and the pilot subcarriers of all 52-tone DRUs, that is, other pilot subcarriers within the 20M bandwidth, is the largest, and the minimum distance is 8 or 9.

[0447] (2) Based on the new 20MHz tone plan described in (1), design a tone plan with a 20MHz discrete bandwidth.

[0448] Generally, in the subcarrier distribution (tone plan) of each bandwidth (20 / 40 / 80 / 160 / 320 MHz), the subcarriers of each DRU can be discretized to the entire bandwidth to obtain a higher power amplification factor.

[0449] For bandwidths greater than 20MHz (such as 40 / 80 / 160 / 320MHz), in uplink transmissions where there is perforation and sites that only support 20MHz (20MHz-only sites) participate, it will be impossible to find a complete DRU for data transmission in the DRU with a bandwidth greater than 20MHz. Based on this, the bandwidth greater than 20MHz can be split into multiple small bandwidths including at least one 20MHz discrete bandwidth, and the DRU is scheduled and transmitted based on the split 20MHz discrete bandwidth. However, the subcarrier distribution of the 20MHz bandwidth is often not completely matched with the subcarrier distribution of the bandwidth greater than 20MHz, that is, the split 20MHz discrete bandwidth does not conform to the spectrum template of the bandwidth greater than 20MHz. Using the split 20MHz discrete bandwidth for DRU scheduling and transmission will affect communication performance.

[0450] For example, taking 80MHz bandwidth as an example, in the presence of puncturing and uplink transmission with the participation of 20M-only sites, as shown in Figure 19, the DRU tone plan based on the 80MHz bandwidth will not be able to find a complete DRU for data transmission. At this time, the entire large bandwidth is usually split into small bandwidths for DRU scheduling. The second 20MHz in the 80MHz bandwidth shown in Figure 19 is punctured, and the DRU is scheduled according to the 20MHz bandwidth tone plan in the 20MHz discrete bandwidth on the left and the 40MHz discrete bandwidth on the right according to the 40MHz bandwidth tone plan. This is also called DRU scheduling and transmission based on the 20MHz discrete bandwidth and the 40MHz discrete bandwidth. Here, the discrete bandwidth refers to the discrete range of the subcarriers contained in each DRU.

[0451] However, as shown in Figure 20, the subcarrier allocation for the 80MHz tone plan does not fully match that for the 20MHz tone plan. Within the 80MHz bandwidth, there are 1024 subcarriers, of which the 12 on the leftmost and 11 on the rightmost are guard subcarriers, and the five in the middle are DC subcarriers. The 1024 subcarriers in the 80MHz bandwidth can be divided into four sections, each with 256 subcarriers, occupying 20MHz of bandwidth. When puncturing is used or 20M-only sites participate in transmission, DRU scheduling and signal transmission are performed based on the 20MHz tone plan in the leftmost or rightmost 20MHz discrete bandwidth. This can lead to misalignment of the guard subcarriers. The leftmost 20MHz discrete bandwidth has six guard subcarriers. Since the actual transmission bandwidth is 80MHz, 12 guard subcarriers are required on the leftmost side to ensure compliance with the spectrum mask, control adjacent channel interference, and meet filtering requirements at the transmitter and receiver. Clearly, six guard subcarriers are missing on the far left. Similarly, for the rightmost 20MHz discrete bandwidth, there are five guard subcarriers on the right. However, the actual transmission bandwidth is 80MHz, requiring 11 guard subcarriers on the right. Clearly, six guard subcarriers are missing on the right. This description uses the 80MHz bandwidth as an example. In reality, all 40 / 80 / 160 / 320MHz bandwidths will experience guard subcarrier misalignment when using the 20MHz discrete bandwidth for DRU scheduling and transmission.

[0452] In order to solve the above technical problems, an embodiment of the present application provides the communication method shown in the following Figure 21 or Figure 22 to solve the above-mentioned problem of misalignment of protection subcarriers.

[0453] FIG21 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG21 , the method may include:

[0454] Step 2101: A first communication device transmits OFDM symbols through a DRU within a 20 MHz discrete bandwidth in a first bandwidth.

[0455] The first bandwidth may be a bandwidth greater than 20 MHz, for example, a bandwidth of 40 / 80 / 160 / 320 MHz.

[0456] Specifically, when scheduling and transmitting DRUs based on the 20MHz discrete bandwidth in the first bandwidth, the useful subcarriers based on the 20MHz bandwidth can be shifted on the spectrum (such as the left shift in the first possible design described below, or the right shift in the second possible design described below) to obtain useful subcarriers of the 20MHz discrete bandwidth. The number of protection subcarriers can be increased by shifting, so that the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the first side of the first bandwidth, or the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the second side of the first bandwidth, that is, the subcarrier distribution of the 20MHz discrete bandwidth meets the spectrum template, adjacent channel interference requirements, and transceiver filter design of the first bandwidth, which is convenient for development and testing. When the first communication device schedules and transmits DRUs based on the 20MHz discrete bandwidth in the first bandwidth, the communication performance can be improved.

[0457] The discrete bandwidth refers to the discrete range of subcarriers contained in each DRU. The 20MHz discrete bandwidth means that the discrete range of subcarriers in each DRU is 20MHz. Bandwidth refers to channel bandwidth, or it can also be called signal bandwidth. The 20MHz bandwidth can also be called 20MHz channel bandwidth, 20MHz signal bandwidth, etc., without limitation. It can be understood that in the embodiment shown in Figure 21, the 20MHz bandwidth refers to the new 20MHz tone plan described in (1) above.

[0458] Among them, useful subcarriers can also be described as occupied subcarriers (occupied tones). For the 256 subcarriers of 20MHz bandwidth or 20MHz discrete bandwidth, all subcarriers between the first non-empty subcarrier and the last non-empty subcarrier are useful subcarriers. Non-empty subcarriers refer to subcarriers allocated to a certain DRU for data or pilot transmission. Useful subcarriers may include data or pilot subcarriers allocated to a certain DRU, DC subcarriers, and empty subcarriers between the first non-empty subcarrier and the last non-empty subcarrier that are not allocated to any DRU. Or it can also be described as useful subcarriers being subcarriers among the 256 subcarriers excluding the protection subcarriers on the first side and the second side.

[0459] The first side of the first bandwidth may refer to the leftmost side when the first bandwidth is arranged in order from low to high in the frequency domain, or it may also be described as the side where the lower frequency subcarrier is located when the first bandwidth is arranged in order from low to high in the frequency domain. The second side of the first bandwidth may refer to the rightmost side when the first bandwidth is arranged in order from low to high in the frequency domain, or it may also be described as the side where the higher frequency subcarrier is located when the first bandwidth is arranged in order from low to high in the frequency domain. Similarly, the first side of the 20MHz discrete bandwidth may refer to the leftmost side when the 20MHz discrete bandwidth is arranged in order from low to high in the frequency domain, or it may also be described as the side where the lower frequency subcarrier is located when the 20MHz discrete bandwidth is arranged in order in the frequency domain. The second side of the 20MHz discrete bandwidth may refer to the rightmost side when the 20MHz discrete bandwidth is arranged in order from low to high in the frequency domain, or it may also be described as the side where the higher frequency subcarrier is located when the 20MHz discrete bandwidth is arranged in order in the frequency domain.

[0460] In the first possible design, taking the number of protection subcarriers on the first side of the first bandwidth as a, the number of protection subcarriers on the second side of the first bandwidth as b, the number of protection subcarriers on the first side of the 20MHz bandwidth as x, and the number of protection subcarriers on the second side of the 20MHz bandwidth as y as an example, the subcarrier index of the DRU in the 20MHz discrete bandwidth can be the subcarrier index of the DRU in the 20MHz bandwidth plus ax, where a, b, x and y are all positive integers.

[0461] The first side of the 20 MHz bandwidth may refer to the leftmost side when the 20 MHz bandwidth is arranged in ascending order of the frequency domain, or may also be described as the side where the lower frequency subcarriers are located when the 20 MHz bandwidth is arranged in the frequency domain. The second side of the 20 MHz bandwidth may refer to the rightmost side when the 20 MHz bandwidth is arranged in ascending order of the frequency domain, or may also be described as the side where the higher frequency subcarriers are located when the 20 MHz bandwidth is arranged in the frequency domain.

[0462] Among them, the useful subcarriers of the 20MHz bandwidth can be the x+1th subcarrier to the 256-yth subcarrier, and the corresponding subcarrier index is: [(x+1):(256-y)]-129=[(x-128):(127-y)]. The useful subcarriers of the 20MHz bandwidth can be shifted to the right by ax subcarriers on the spectrum to obtain the useful subcarriers of the 20MHz discrete bandwidth, that is, the useful subcarriers of the 20MHz discrete bandwidth are the a+1th subcarrier to the 256-y+axth subcarrier, so that the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is a, which is the same as the number of protection subcarriers on the first side of the first bandwidth, and conforms to the spectrum template of the first bandwidth.

[0463] It is understandable that, since communication is based on DRU, the above description can also be replaced by: shifting the DRU in the 20MHz bandwidth to the right by ax subcarriers on the spectrum to obtain the DRU in the 20MHz discrete bandwidth, that is, the subcarrier index of the DRU in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the 20MHz bandwidth plus ax. Or it can be described as: the DRU in the 20MHz discrete bandwidth is obtained by shifting the DRU in the 20MHz bandwidth to the right by ax subcarriers on the spectrum, or it can be described as: the DRU in the 20MHz discrete bandwidth is obtained by shifting the DRU in the 20MHz bandwidth to the right by ax subcarriers on the spectrum, without limitation.

[0464] Specifically, the subcarrier index of the DRU with the same serial number in the 20 MHz discrete bandwidth is the subcarrier index of the DRU with the same serial number in the 20 MHz bandwidth plus ax.

[0465] That is, the subcarrier index of the first DRU (or described as DRU1) in the 20MHz discrete bandwidth is the subcarrier index of the first DRU in the 20MHz bandwidth plus ax; the subcarrier index of the second DRU (or described as DRU2) in the 20MHz discrete bandwidth is the subcarrier index of the second DRU in the 20MHz bandwidth plus ax; ...; the subcarrier index of the i-th DRU (or described as DRU i) in the 20MHz discrete bandwidth is the subcarrier index of the i-th DRU in the 20MHz bandwidth plus ax; ...; the subcarrier index of the I-th DRU (or described as DRUI) in the 20MHz discrete bandwidth is the subcarrier index of the I-th DRU in the 20MHz bandwidth plus ax. Where i = 1, 2, ..., I; I is a positive integer.

[0466] For example, the 256 subcarriers with the lowest frequency of the first bandwidth can be used as a 20 MHz discrete bandwidth for DRU scheduling and transmission. The 256 subcarriers with the lowest frequency of the first bandwidth can also be referred to as the leftmost 256 subcarriers arranged in descending order of frequency in the first bandwidth, or the first 256 subcarriers on the first side of the first bandwidth.

[0467] In the first possible design mentioned above, compared with the subcarriers of the DRU in the 20MHz bandwidth, the subcarriers of the DRU in the 20MHz discrete bandwidth are shifted to the right by ax subcarriers, and the ax subcarriers on the left can be used as protection subcarriers, that is, the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is a (including x protection subcarriers and the aforementioned ax protection subcarriers), which is the same as the number of protection subcarriers on the first side of the first bandwidth. The subcarrier distribution of the 20MHz discrete bandwidth conforms to the spectrum template of the first bandwidth. When the first communication device schedules and transmits the DRU based on the 20MHz discrete bandwidth in the first bandwidth, the communication performance can be improved.

[0468] In the second possible design, taking the number of protection subcarriers on the first side of the first bandwidth as a, the number of protection subcarriers on the second side of the first bandwidth as b, the number of protection subcarriers on the first side of the 20MHz bandwidth as x, and the number of protection subcarriers on the second side of the 20MHz bandwidth as y as an example, the subcarrier index of the DRU in the 20MHz discrete bandwidth can be the subcarrier index of the DRU in the 20MHz bandwidth minus by, and a, b, x and y are all positive integers.

[0469] Among them, the useful subcarriers of the 20MHz bandwidth can be the x+1th subcarrier to the 256-yth subcarrier, and the corresponding subcarrier index is: [(x+1):(256-y)]-129=[(x-128):(127-y)]. The useful subcarriers of the 20MHz bandwidth can be shifted left by by subcarriers on the spectrum to obtain the useful subcarriers of the 20MHz discrete bandwidth, that is, the useful subcarriers of the 20MHz discrete bandwidth are the x+1-b+yth subcarrier to the 256-bth subcarrier, so that the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is b, which is the same as the number of protection subcarriers on the second side of the first bandwidth, and conforms to the spectrum template of the first bandwidth.

[0470] It is understandable that, since communication is based on DRU, the above description can also be replaced by: shifting the DRU in the 20MHz bandwidth to the left by by subcarriers on the spectrum to obtain the DRU in the 20MHz discrete bandwidth, that is, the subcarrier index of the DRU in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the 20MHz bandwidth minus by. Or it can be described as: the DRU in the 20MHz discrete bandwidth is obtained by shifting the DRU in the 20MHz bandwidth by by subcarriers on the spectrum, or it can be described as: the DRU in the 20MHz discrete bandwidth is obtained by shifting the DRU in the 20MHz bandwidth to the left by by subcarriers on the spectrum, without limitation.

[0471] Specifically, the subcarrier index of the DRU with the same serial number in the 20 MHz discrete bandwidth is the subcarrier index of the DRU with the same serial number in the 20 MHz bandwidth minus by.

[0472] That is, the subcarrier index of the first DRU (or described as DRU1) in the 20MHz discrete bandwidth is the subcarrier index of the first DRU in the 20MHz bandwidth minus by; the subcarrier index of the second DRU (or described as DRU2) in the 20MHz discrete bandwidth is the subcarrier index of the second DRU in the 20MHz bandwidth minus by; ...; the subcarrier index of the i-th DRU (or described as DRU i) in the 20MHz discrete bandwidth is the subcarrier index of the i-th DRU in the 20MHz bandwidth minus by; ...; the subcarrier index of the I-th DRU (or described as DRUI) in the 20MHz discrete bandwidth is the subcarrier index of the I-th DRU in the 20MHz bandwidth minus by. Where i = 1, 2, ..., I; I is a positive integer.

[0473] For example, the 256 highest frequency subcarriers of the first bandwidth can be used as a 20 MHz discrete bandwidth for DRU scheduling and transmission. The 256 highest frequency subcarriers of the first bandwidth can also be referred to as the rightmost 256 subcarriers arranged in descending order of frequency in the first bandwidth, or the last 256 subcarriers on the second side of the first bandwidth.

[0474] In the second possible design mentioned above, compared with the subcarriers of the DRU in the 20MHz bandwidth, the subcarriers of the DRU in the 20MHz discrete bandwidth are shifted to the left by by subcarriers, and the by subcarriers on the right can be used as protection subcarriers, that is, the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is b (including y protection subcarriers and the aforementioned by protection subcarriers), which is the same as the number of protection subcarriers on the second side of the first bandwidth. The subcarrier distribution of the 20MHz discrete bandwidth conforms to the spectrum template of the first bandwidth. When the first communication device schedules and transmits the DRU based on the 20MHz discrete bandwidth in the first bandwidth, the communication performance can be improved.

[0475] Based on the above two possible designs, the subcarrier distribution of the DRU in the 20MHz bandwidth is taken as the new 20MHz tone plan described in (1) above as an example. It can be determined that the number of protection subcarriers x on the first side is 8, and the number of protection subcarriers y on the second side is 7. For the first bandwidth, taking the number of protection subcarriers a on the first side as 12 and the number of protection subcarriers b on the second side as 11 as an example, based on the above first possible design, the DRU in the 20MHz bandwidth can be shifted to the right by ax=4 subcarriers to obtain the subcarrier distribution of the DRU in the 20MHz discrete bandwidth (or it can also be described as Shifted 20MHz Tone Plan-1). Alternatively, based on the above second possible design, the DRU in the 20MHz bandwidth can be shifted to the left by by=4 subcarriers to obtain the subcarrier distribution of the DRU in the 20MHz discrete bandwidth (or it can also be described as Shifted 20MHz Tone Plan-2).

[0476] The following takes the subcarrier distribution of the DRU in the 20MHz bandwidth as the new 20MHz tone plan described in (1) above as an example, and refers to the following eight possible examples, when the first bandwidth is 40MHz bandwidth, 80MHz bandwidth, 160MHz bandwidth, and 320MHz bandwidth, respectively, to describe the DRU in the first bandwidth in detail. Wherein, the first bandwidth is 40MHz bandwidth, 80MHz bandwidth, 160MHz bandwidth, or 320MHz bandwidth, and the number of protection subcarriers on the first side is 12, and the number of protection subcarriers on the second side is 11.

[0477] In the first possible example, taking the first bandwidth as 40MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers with the lowest frequency in the 40MHz bandwidth. Among them, the 9th to 249th subcarriers in the 20MHz bandwidth can be shifted to the right to obtain the 13th to 253rd subcarriers in the 20MHz discrete bandwidth, or described as shifting the DRU in the 20MHz bandwidth to the right by 4 subcarriers to obtain the DRU in the 20MHz discrete bandwidth. To ensure that the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the first side of the 40MHz bandwidth, both of which are 12. After the shift, when the 256 subcarriers with the lowest frequency in the 40MHz bandwidth are used as the 20MHz discrete bandwidth, the subcarrier index of its DRU can be obtained by subtracting 124 from the subcarrier index of each DRU in the 20MHz bandwidth.

[0478] In the second possible example, taking the first bandwidth as 40MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers of the highest frequency in the 40MHz bandwidth. Among them, the 9th subcarrier to the 249th subcarrier in the 20MHz bandwidth can be shifted to the left to obtain the 5th subcarrier to the 245th subcarrier in the 20MHz discrete bandwidth, or it can be described as shifting the DRU in the 20MHz bandwidth to the left by 4 subcarriers to obtain the DRU in the 20MHz discrete bandwidth. To ensure that the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the second side of the 40MHz bandwidth, both of which are 11. After the shift, when the 256 subcarriers of the highest frequency in the 40MHz bandwidth are used as the 20MHz discrete bandwidth, the subcarrier index of its DRU can be obtained by adding 124 to the subcarrier index of each DRU in the 20MHz bandwidth.

[0479] In the third possible example, taking the first bandwidth as 80MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers with the lowest frequency in the 80MHz bandwidth. Among them, the 9th to 249th subcarriers in the 20MHz bandwidth can be shifted to the right to obtain the 13th to 253rd subcarriers in the 20MHz discrete bandwidth, or described as shifting the DRU in the 20MHz bandwidth to the right by 4 subcarriers to obtain the DRU in the 20MHz discrete bandwidth. To ensure that the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the first side of the 80MHz bandwidth, both of which are 12. After the shift, when the 256 subcarriers with the lowest frequency in the 80MHz bandwidth are used as the 20MHz discrete bandwidth, the subcarrier index of its DRU can be obtained by subtracting 380 from the subcarrier index of each DRU in the 20MHz bandwidth.

[0480] In the fourth possible example, taking the first bandwidth as 80MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers of the highest frequency in the 80MHz bandwidth. Among them, the 9th to 249th subcarriers in the 20MHz bandwidth can be shifted to the left to obtain the 5th to 245th subcarriers in the 20MHz discrete bandwidth, or described as shifting the DRU in the 20MHz bandwidth to the left by 4 subcarriers to obtain the DRU in the 20MHz discrete bandwidth. To ensure that the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the second side of the 80MHz bandwidth, both are 11. After the shift, when the 256 subcarriers of the highest frequency in the 80MHz bandwidth are used as the 20MHz discrete bandwidth, the subcarrier index of its DRU can be obtained by adding 380 to the subcarrier index of each DRU in the 20MHz bandwidth.

[0481] In the fifth possible example, taking the first bandwidth as 160MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers with the lowest frequency in the 160MHz bandwidth. Among them, the 9th to 249th subcarriers in the 20MHz bandwidth can be shifted to the right to obtain the 13th to 253rd subcarriers in the 20MHz discrete bandwidth, or described as shifting the DRU in the 20MHz bandwidth to the right by 4 subcarriers to obtain the DRU in the 20MHz discrete bandwidth. To ensure that the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the first side of the 160MHz bandwidth, both of which are 12. After the shift, when the 256 subcarriers with the lowest frequency in the 160MHz bandwidth are used as the 20MHz discrete bandwidth, the subcarrier index of its DRU can be obtained by subtracting 892 from the subcarrier index of each DRU in the 20MHz bandwidth.

[0482] In the sixth possible example, taking the first bandwidth as 160MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers of the highest frequency in the 160MHz bandwidth. Among them, the 9th subcarrier to the 249th subcarrier in the 20MHz bandwidth can be shifted to the left to obtain the 5th subcarrier to the 245th subcarrier in the 20MHz discrete bandwidth, or it can be described as shifting the DRU in the 20MHz bandwidth to the left by 4 subcarriers to obtain the DRU in the 20MHz discrete bandwidth. To ensure that the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the second side of the 160MHz bandwidth, both of which are 11. After the shift, when the 256 subcarriers of the highest frequency in the 160MHz bandwidth are used as the 20MHz discrete bandwidth, the subcarrier index of its DRU can be obtained by adding 892 to the subcarrier index of each DRU in the 20MHz bandwidth.

[0483] In the seventh possible example, taking the first bandwidth as 40MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers with the lowest frequency in the 40MHz bandwidth. Among them, the 9th to 249th subcarriers in the 20MHz bandwidth can be shifted to the right to obtain the 13th to 253rd subcarriers in the 20MHz discrete bandwidth, or described as shifting the DRU in the 20MHz bandwidth to the right by 4 subcarriers to obtain the DRU in the 20MHz discrete bandwidth. To ensure that the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the first side of the 40MHz bandwidth, both of which are 12. After the shift, when the 256 subcarriers with the lowest frequency in the 40MHz bandwidth are used as the 20MHz discrete bandwidth, the subcarrier index of its DRU can be obtained by subtracting 1916 from the subcarrier index of each DRU in the 20MHz bandwidth.

[0484] In the eighth possible example, taking the first bandwidth as 40MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers of the highest frequency in the 40MHz bandwidth. Among them, the 9th to 249th subcarriers in the 20MHz bandwidth can be shifted to the left to obtain the 5th to 245th subcarriers in the 20MHz discrete bandwidth, or described as shifting the DRU in the 20MHz bandwidth to the left by 4 subcarriers to obtain the DRU in the 20MHz discrete bandwidth. To ensure that the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the second side of the 40MHz bandwidth, both are 11. After the shift, when the 256 subcarriers of the highest frequency in the 40MHz bandwidth are used as the 20MHz discrete bandwidth, the subcarrier index of its DRU can be obtained by adding 1916 to the subcarrier index of each DRU in the 20MHz bandwidth.

[0485] It can be understood that in the above method, when the subcarrier is shifted, the position of the DC subcarrier (such as the subcarrier with a subcarrier index of -1, 0, or 1) is moved, which is not friendly to the 20MHz-only site. The following two solutions can be used to solve this technical problem. One is to make the 20MHz-only site generate a new frequency carrier; the other is to prohibit the 20MHz-only site from transmitting on these DRUs at the protocol level, such as the first DRU mentioned below.

[0486] The first communication device does not transmit OFDM symbols on the first DRU within the 20 MHz discrete bandwidth, or does not transmit OFDM symbols on the first DRU. The first DRU includes one or more of the following subcarriers: a subcarrier with an index of -1, a subcarrier with an index of 0, or a subcarrier with an index of 1. Alternatively, it can be described as: transmitting OFDM symbols within the 20 MHz discrete bandwidth via a DRU that does not include one or more of the following subcarriers: a subcarrier with an index of -1, a subcarrier with an index of 0, or a subcarrier with an index of 1.

[0487] That is, for the first bandwidth, when the 256 subcarriers at its lowest frequency are used as a 20M discrete bandwidth, DRU scheduling and transmission will be performed based on Table 4 above. It is necessary to prohibit 20MHz-only sites from sending DRUs whose subcarrier indexes contain [-1,0,1]. That is, 26-tone DRU3, 26-tone DRU5, 26-tone DRU6, 52-tone DRU1, 52-tone DRU3, 106-tone DRU1, and 106-tone DRU2 are prohibited.

[0488] Alternatively, for the first bandwidth, when the 256 subcarriers at its highest frequency are used as a 20M discrete bandwidth, DRU scheduling and transmission will be performed based on Table 5 above. It is necessary to prohibit 20MHz-only sites from sending DRUs whose subcarrier indexes include [-1, 0, 1], that is, prohibit 106-tone DRU1 and 106-tone DRU2.

[0489] (3) Without changing the position of the 20M bandwidth DC subcarrier, ensure that the protection subcarriers can be aligned when the 256 subcarriers of the lowest and highest frequencies of 40M / 80M / 160M / 320M are used as 20M discrete bandwidth for DRU calling.

[0490] Different from the above method of shifting the useful subcarriers in the 20MHz bandwidth as a whole to obtain the useful subcarriers in the 20MHz discrete bandwidth, the useful subcarriers in the 20MHz bandwidth can also be divided into N areas with reference to the method shown in Figure 22 below, and the subcarriers in each area are shifted separately to increase the number of protection subcarriers by shifting, so that the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the first side of the first bandwidth, or the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is the same as the number of protection subcarriers on the second side of the first bandwidth. At the same time, the position of the DC subcarrier is not changed, which is more friendly to 20MHz-only sites.

[0491] FIG22 is a schematic diagram of a communication method provided in an embodiment of the present application. As shown in FIG22 , the method may include:

[0492] Step 2201: A first communication device transmits OFDM symbols through a DRU within a 20 MHz discrete bandwidth in a first bandwidth.

[0493] The subcarrier index of the DRU in the nth region in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in the n'th region in the 20 MHz bandwidth plus the nth value; n=n'=1, 2, ..., N; N is a positive integer.

[0494] It can be understood that in the embodiment shown in FIG. 22 , the 20 MHz bandwidth refers to the new 20 MHz tone plan described in (1) above.

[0495] Specifically, N regions of 20MHz bandwidth can be determined according to the position of the DC subcarrier. For example, the subcarriers located to the left of the DC subcarrier among the useful subcarriers (i.e., the useful subcarriers whose subcarrier index is less than the DC subcarrier index) can be divided into one or more regions, and the subcarriers located to the right of the DC subcarrier among the useful subcarriers (i.e., the useful subcarriers whose subcarrier index is greater than the DC subcarrier index) can be divided into one or more regions.

[0496] When scheduling and transmitting DRUs based on a 20MHz discrete bandwidth in the first bandwidth, the useful subcarriers in N regions of the 20MHz bandwidth can be shifted separately on the spectrum of the 20MHz bandwidth (such as shifting to the left in the first possible design below, or shifting to the right in the second possible design below) to obtain useful subcarriers of the 20MHz discrete bandwidth. The number of protection subcarriers can be increased by shifting, so that the subcarrier distribution of the 20MHz discrete bandwidth meets the spectrum template of the first bandwidth, the adjacent channel interference requirements, and the transceiver filter design, which is convenient for development and testing. At the same time, the position of the DC subcarrier is not changed, which is more friendly to 20MHz-only sites and improves communication performance.

[0497] For example, taking the number of DC subcarriers in a 20MHz bandwidth as K, for a 20MHz bandwidth, its DC subcarriers are the 129-(K-1) / 2th subcarrier to the 129+(K-1) / 2th subcarrier, and its subcarrier index is [-(K-1) / 2:(K-1) / 2]. The subcarrier index after removing the DC subcarrier from the useful subcarrier is [(x-128):-(K-1) / 2-1,(K-1) / 2+1:(127-y)], that is, the x+1th subcarrier to the 128-(K-1) / 2th subcarrier, and the 130+(K-1) / 2th subcarrier to the 256-yth subcarrier are the non-DC parts of the useful subcarriers, and the non-DC part can be divided into N regions.

[0498] In the first possible design, taking the number of protection subcarriers on the first side of the first bandwidth as a, the number of protection subcarriers on the second side of the first bandwidth as b, the number of protection subcarriers on the first side of the 20MHz bandwidth as x, the number of protection subcarriers on the second side of the 20MHz bandwidth as y, and the number of DC subcarriers in the 20MHz bandwidth as K as an example, the non-DC part of the useful subcarriers of the 20MHz bandwidth can be divided into three regions based on the position of the DC subcarriers in the 20MHz bandwidth, namely the following 1' region, 2' region, and 3' region.

[0499] The first region includes the (x+1)th subcarrier to the Tth subcarrier arranged in frequency domain order within the 20 MHz bandwidth; the second region includes the (T+1)th subcarrier to the (128-(K-1) / 2)th subcarrier arranged in frequency domain order within the 20 MHz bandwidth; and the third region includes the (130+(K-1) / 2)th subcarrier to the (256-y)th subcarrier arranged in frequency domain order within the 20 MHz bandwidth. Both K and T are positive integers.

[0500] Based on the above three regions of 20MHz bandwidth, the subcarriers in the 1st region can be shifted right by ax subcarriers (i.e., the first value is ax), the subcarriers in the 2nd region can be shifted right by P subcarriers (i.e., the second value is P), and the subcarriers in the 3rd region can be shifted right by Q subcarriers (i.e., the third value is Q) on the spectrum of the 20MHz bandwidth, thereby obtaining the subcarriers of the three regions of 20MHz discrete bandwidth (i.e., the 1st region, the 2nd region, and the 3rd region below). That is, the subcarrier index of the 1st region in the 20MHz discrete bandwidth is the subcarrier index of the 1st region in the 20MHz bandwidth plus ax; the subcarrier index of the 2nd region in the 20MHz discrete bandwidth is the subcarrier index of the 2nd region in the 20MHz bandwidth plus P; and the subcarrier index of the 3rd region in the 20MHz discrete bandwidth is the subcarrier index of the 3rd region in the 20MHz bandwidth plus Q. Wherein, a, x, P, and Q are all positive integers. Thus, the number of guard subcarriers on the first side of the 20 MHz discrete bandwidth is a, which is the same as the number of guard subcarriers on the first side of the first bandwidth and conforms to the spectrum template of the first bandwidth. Meanwhile, the position of the DC subcarrier is not changed.

[0501] Among them, the first region includes the (a+1)th subcarrier to the (T+ax)th subcarrier arranged in frequency domain order in the 20MHz discrete bandwidth; the second region includes the (T+1+P)th subcarrier to the (128-(K-1) / 2+P)th subcarrier arranged in frequency domain order in the 20MHz discrete bandwidth; the third region includes the (130+(K-1) / 2+Q)th subcarrier to the (256-y+Q)th subcarrier arranged in frequency domain order in the 20MHz discrete bandwidth.

[0502] It can be understood that since communication is based on DRU, the above description can also be replaced by: on the spectrum of 20MHz bandwidth, the DRU in the 20MHz bandwidth is shifted to the right by ax subcarriers in the 1st' area, shifted to the right by P subcarriers in the 2nd' area, and shifted to the right by Q subcarriers in the 3rd' area to obtain the DRU in the 20MHz discrete bandwidth, that is, the subcarrier index of the DRU in the 20MHz discrete bandwidth in the 1st area is the subcarrier index of the DRU in the 20MHz bandwidth in the 1st' area plus ax; the subcarrier index of the DRU in the 20MHz discrete bandwidth in the 2nd area is the subcarrier index of the DRU in the 20MHz bandwidth in the 2nd' area plus P; the subcarrier index of the DRU in the 20MHz discrete bandwidth in the 3rd area is the subcarrier index of the DRU in the 20MHz bandwidth in the 3rd' area plus Q.

[0503] Or it can be described as: the subcarriers in the first area of ​​the DRU in the 20MHz discrete bandwidth are the subcarriers in the 1' area of ​​the DRU in the 20MHz bandwidth shifted (or shifted to the right) by ax subcarriers, the subcarriers in the second area of ​​the DRU in the 20MHz discrete bandwidth are the subcarriers in the 2' area of ​​the DRU in the 20MHz bandwidth shifted (or shifted to the right) by P subcarriers, and the subcarriers in the third area of ​​the DRU in the 20MHz discrete bandwidth are the subcarriers in the 3' area of ​​the DRU in the 20MHz bandwidth shifted (or shifted to the right) by Q subcarriers.

[0504] Specifically, the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the first area is the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the 1st' area plus ax; the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the second area is the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the 2nd' area plus P; the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the third area is the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the 3rd' area plus Q.

[0505] Exemplarily, 256 subcarriers of the lowest frequency of the first bandwidth may be used as a 20 MHz discrete bandwidth for scheduling and transmission of the DRU.

[0506] In the first possible design mentioned above, compared with the subcarriers of the DRU in the 20MHz bandwidth, the subcarriers in the first area of ​​the DRU in the 20MHz discrete bandwidth are shifted to the right by ax subcarriers, and the ax subcarriers on the left can be used as protection subcarriers, that is, the number of protection subcarriers on the first side of the 20MHz discrete bandwidth is a (including x protection subcarriers and the aforementioned ax protection subcarriers), which is the same as the number of protection subcarriers on the first side of the first bandwidth. The subcarrier distribution of the 20MHz discrete bandwidth conforms to the spectrum template of the first bandwidth. When the first communication device schedules and transmits the DRU in the first bandwidth based on the 20MHz discrete bandwidth, the communication performance can be improved. At the same time, the position of the DC subcarrier is not changed, which is more friendly to 20MHz-only sites.

[0507] In the second possible design, taking the number of protection subcarriers on the first side of the first bandwidth as a, the number of protection subcarriers on the second side of the first bandwidth as b, the number of protection subcarriers on the first side of the 20MHz bandwidth as x, the number of protection subcarriers on the second side of the 20MHz bandwidth as y, and the number of DC subcarriers in the 20MHz bandwidth as K as an example, the non-DC part of the useful subcarriers of the 20MHz bandwidth can be divided into three regions based on the position of the DC subcarriers in the 20MHz bandwidth, namely the following 1' region, 2' region, and 3' region.

[0508] The first region includes the (x+1)th subcarrier to the (128-(K-1) / 2)th subcarrier arranged in frequency domain order within the 20 MHz bandwidth; the second region includes the (130+(K-1) / 2)th subcarrier to the Sth subcarrier arranged in frequency domain order within the 20 MHz bandwidth; and the third region includes the (S+1)th subcarrier to the (256-y)th subcarrier arranged in frequency domain order within the 20 MHz bandwidth. K and S are both positive integers.

[0509] Based on the above three regions of the 20MHz bandwidth, the subcarriers in the 1st region can be shifted left by Q subcarriers (i.e., the first value is -Q), the subcarriers in the 2nd region can be shifted left by P subcarriers (i.e., the second value is -P), and the subcarriers in the 3rd region can be shifted left by by subcarriers (i.e., the third value is -(by)) on the spectrum of the 20MHz bandwidth, thereby obtaining the subcarriers of the three regions of the 20MHz discrete bandwidth (i.e., the 1st region, the 2nd region, and the 3rd region described below). That is, the subcarrier index of the 1st region in the 20MHz discrete bandwidth is the subcarrier index of the 1st region in the 20MHz bandwidth plus -Q (or minus Q); the subcarrier index of the 2nd region in the 20MHz discrete bandwidth is the subcarrier index of the 2nd region in the 20MHz bandwidth plus -P (or minus P); and the subcarrier index of the 3rd region in the 20MHz discrete bandwidth is the subcarrier index of the 3rd region in the 20MHz bandwidth plus -(by) (or minus by). b, y, P, and Q are all positive integers. This ensures that the number of guard subcarriers on the second side of the 20 MHz discrete bandwidth is b, which is the same as the number of guard subcarriers on the second side of the first bandwidth, conforming to the spectrum template of the first bandwidth. The position of the DC subcarrier remains unchanged.

[0510] Among them, the first region includes the (x+1-Q)th subcarrier to the (128-(K-1) / 2-Q)th subcarrier arranged in frequency domain order in the 20MHz discrete bandwidth; the second region includes the (130+(K-1) / 2-P)th subcarrier to the (SP)th subcarrier arranged in frequency domain order in the 20MHz discrete bandwidth; the third region includes the (S+1-b+y)th subcarrier to the (256-b)th subcarrier arranged in frequency domain order in the 20MHz discrete bandwidth.

[0511] It can be understood that since communication is based on DRU, the above description can also be replaced by: on the spectrum of 20MHz bandwidth, the DRU in the 20MHz bandwidth is shifted to the left by Q subcarriers in the 1st' area, shifted to the left by P subcarriers in the 2nd' area, and shifted to the left by by subcarriers in the 3rd' area to obtain the DRU in the 20MHz discrete bandwidth, that is, the subcarrier index of the DRU in the 20MHz discrete bandwidth in the 1st area is the subcarrier index of the DRU in the 20MHz bandwidth in the 1st' area plus -Q; the subcarrier index of the DRU in the 20MHz discrete bandwidth in the 2nd area is the subcarrier index of the DRU in the 20MHz bandwidth in the 2nd' area plus -P; the subcarrier index of the DRU in the 20MHz discrete bandwidth in the 3rd area is the subcarrier index of the DRU in the 20MHz bandwidth in the 3rd' area plus -(by).

[0512] Or it can be described as: the subcarrier in the first area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 1' area of ​​the DRU in the 20MHz bandwidth shifted (or shifted left) by Q subcarriers, the subcarrier in the second area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 2' area of ​​the DRU in the 20MHz bandwidth shifted (or shifted left) by P subcarriers, and the subcarrier in the third area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 3' area of ​​the DRU in the 20MHz bandwidth shifted (or shifted left) by by subcarriers.

[0513] Specifically, the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the first area is the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the 1st' area plus -Q; the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the second area is the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the 2nd' area plus -P; the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the third area is the subcarrier index of the DRU with the same serial number in the 20MHz discrete bandwidth in the 3rd' area plus -(by).

[0514] Exemplarily, 256 subcarriers of the highest frequency of the first bandwidth may be used as a 20 MHz discrete bandwidth for scheduling and transmission of the DRU.

[0515] In the second possible design mentioned above, compared with the subcarriers of the DRU in the 20MHz bandwidth, the subcarriers in the third area of ​​the DRU in the 20MHz discrete bandwidth are shifted to the left by by subcarriers, and the by subcarriers on the right can be used as protection subcarriers, that is, the number of protection subcarriers on the second side of the 20MHz discrete bandwidth is b (including y protection subcarriers and the aforementioned by protection subcarriers), which is the same as the number of protection subcarriers on the second side of the first bandwidth. The subcarrier distribution of the 20MHz discrete bandwidth conforms to the spectrum template of the first bandwidth. When the first communication device schedules and transmits the DRU based on the 20MHz discrete bandwidth in the first bandwidth, the communication performance can be improved. At the same time, the position of the DC subcarrier is not changed, which is more friendly to 20MHz-only sites.

[0516] Taking the subcarrier distribution of the DRU in the 20MHz bandwidth as the new 20MHz tone plan described in (1) above as an example, it can be determined that the number of protection subcarriers x on the first side is 8, the number of protection subcarriers y on the second side is 7, and the number of DC subcarriers K included is 3, that is, the subcarriers with subcarrier indexes of -1, 0, and 1 are DC subcarriers. For the first bandwidth, taking the number of protection subcarriers a on the first side as 12 and the number of protection subcarriers b on the second side as 11 as an example, based on the first possible design mentioned above, taking T as 123, P as 7, and Q as 5 as an example, each DRU in the 20MHz discrete bandwidth after the shift can still guarantee the maximum power gain, the subcarrier index in the 1st area can be increased by 4, the subcarrier index in the 2nd area can be increased by 7, and the subcarrier index in the 3rd area can be increased by 5, to obtain the subcarrier distribution of the DRU in the 20MHz discrete bandwidth shown in the following Table 8 or Table 9 or Table 10 (or it can also be described as Shifted 20MHz Tone Plan-1).

[0517] Table 8

[0518] Table 9

[0519] Table 10

[0520] Alternatively, taking the new 20MHz tone plan described in (1) above as an example of the subcarrier distribution of the DRU in the 20MHz bandwidth, it can be determined that the number of protection subcarriers x on the first side is 8, the number of protection subcarriers y on the second side is 7, and the number of DC subcarriers K included is 3, that is, the subcarriers with subcarrier indexes of -1, 0, and 1 are DC subcarriers. For the first bandwidth, taking the number of protection subcarriers a on the first side as 12 and the number of protection subcarriers b on the second side as 11 as an example, it can also be based on the above-mentioned second possible design, taking S as 134, P as 7, and Q as 5 as an example, so that each DRU in the 20MHz discrete bandwidth after the shift can still guarantee the maximum power gain, the subcarrier index in the 1st' area can be reduced by 5, the subcarrier index in the 2nd' area can be reduced by 7, and the subcarrier index in the 3rd' area can be reduced by 4, and the subcarrier distribution of the DRU in the 20MHz discrete bandwidth shown in the following Table 11 or Table 12 or Table 13 is obtained (or it can also be described as Shifted 20MHz Tone Plan-2).

[0521] Table 11

[0522] Table 12

[0523] Table 13

[0524] The following takes the subcarrier distribution of the DRU in the 20MHz bandwidth as the new 20MHz tone plan described in (1) above as an example, and refers to the following eight possible examples, when the first bandwidth is 40MHz bandwidth, 80MHz bandwidth, 160MHz bandwidth, and 320MHz bandwidth, respectively, to describe the DRU in the first bandwidth in detail. Wherein, the first bandwidth is 40MHz bandwidth, 80MHz bandwidth, 160MHz bandwidth, or 320MHz bandwidth, and the number of protection subcarriers on the first side is 12, and the number of protection subcarriers on the second side is 11.

[0525] In a first possible example, taking the first bandwidth as 40 MHz, the DRU can be scheduled and transmitted based on a 20 MHz discrete bandwidth on the 256 subcarriers at the lowest frequency of the 40 MHz bandwidth. The subcarrier index included in the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in Table 8, Table 9, or Table 10 minus 128.

[0526] In a second possible example, taking the first bandwidth as 40 MHz, the DRU can be scheduled and transmitted based on a 20 MHz discrete bandwidth on the 256 subcarriers of the highest frequency of the 40 MHz bandwidth. The subcarrier index included in the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in Table 11, Table 12, or Table 13 above plus 128.

[0527] In a third possible example, taking the first bandwidth as 80 MHz, the DRU can be scheduled and transmitted based on a 20 MHz discrete bandwidth on the 256 subcarriers at the lowest frequency of the 80 MHz bandwidth. The subcarrier index included in the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in Table 8, Table 9, or Table 10 minus 384.

[0528] In a fourth possible example, taking the first bandwidth as 80 MHz, the DRU can be scheduled and transmitted based on a 20 MHz discrete bandwidth on 256 subcarriers of the highest frequency of the 80 MHz bandwidth. The subcarrier index included in the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in Table 11, Table 12, or Table 13 above plus 384.

[0529] In a fifth possible example, taking the first bandwidth as 160 MHz, the DRU can be scheduled and transmitted based on a 20 MHz discrete bandwidth on the 256 subcarriers at the lowest frequency of the 160 MHz bandwidth. The subcarrier index included in the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in Table 8, Table 9, or Table 10 minus 896.

[0530] In a sixth possible example, taking the first bandwidth as 160 MHz, the DRU can be scheduled and transmitted based on a 20 MHz discrete bandwidth on 256 subcarriers of the highest frequency of the 160 MHz bandwidth. The subcarrier index included in the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in Table 11, Table 12, or Table 13 above plus 896.

[0531] In a seventh possible example, taking the first bandwidth as 320 MHz, the DRU can be scheduled and transmitted based on a 20 MHz discrete bandwidth on the 256 subcarriers at the lowest frequency of the 320 MHz bandwidth. The subcarrier index of the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in Table 8, Table 9, or Table 10 minus 1920.

[0532] In an eighth possible example, taking the first bandwidth as 320 MHz, the DRU can be scheduled and transmitted based on a 20 MHz discrete bandwidth on 256 subcarriers of the highest frequency of the 320 MHz bandwidth. The subcarrier index included in the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in Table 11, Table 12, or Table 13 above plus 1920.

[0533] The present application also provides a communication method, as shown in FIG23 , which includes:

[0534] Step 2301: A first communication device transmits OFDM symbols through a DRU within a 20 MHz discrete bandwidth in a first bandwidth.

[0535] The number of guard subcarriers of the 20 MHz discrete bandwidth is the same as the number of guard subcarriers of the first bandwidth.

[0536] Specifically, the number of protection subcarriers on the first side of the 20 MHz discrete bandwidth is the same as the number of protection subcarriers on the first side of the first bandwidth; or, the number of protection subcarriers on the second side of the 20 MHz discrete bandwidth is the same as the number of protection subcarriers on the second side of the first bandwidth.

[0537] Among them, based on the method shown in Figure 21 or Figure 22 above, the number of protection subcarriers in the 20MHz discrete bandwidth can be made the same as the number of protection subcarriers in the first bandwidth, which is not described here in detail.

[0538] It should be noted that the various embodiments of this application can be implemented independently or in combination, without limitation. Unless otherwise specified or there is a logical conflict, the terms and / or descriptions of the different embodiments provided in this application are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0539] It is understood that in the embodiments of the present application, the execution subject may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be performed.

[0540] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between devices. It is understandable that, in order to realize the above functions, each device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, 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 the form of hardware or computer software driving hardware 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.

[0541] The embodiments of the present application can divide the functional modules of each device according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

[0542] In the case of dividing each functional module according to each function, Figure 15 shows a communication device 150, which can execute the actions performed by the first communication device in the method shown in Figures 6 to 14 above. All relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module. The technical effects that can be obtained can be referred to the above method embodiment and will not be repeated here.

[0543] The communication device 150 may include a transmission module 1501 and a processing module 1502. For example, the communication device 150 may be a communication device, or a chip used in a communication device, or other combination devices or components having the functions of the above-mentioned transmitting end device.

[0544] When the communication apparatus 150 is a communication device, the transmission module 1501 may be a transceiver; the processing module 1502 may be a processor (or a processing circuit), such as a baseband processor, which may include one or more CPUs.

[0545] When the communication device 150 is a component having the above-mentioned transmitting end device function, the transmission module 1501 may be a radio frequency unit; the processing module 1502 may be a processor (or processing circuit), such as a baseband processor.

[0546] When the communication device 150 is a chip system, the transmission module 1501 can be the input and output interface of the chip (such as a baseband chip); the processing module 1502 can be the processor (or processing circuit) of the chip system, which can include one or more central processing units.

[0547] It should be understood that the transmission module 1501 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component; the processing module 1502 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0548] For example, the transmission module 1501 can be used to perform all transmission operations performed by the first communication device in the embodiments shown in Figures 6 to 14, and / or to support other processes of the technology described herein; the processing module 1502 is used to control the transmission module 1501 to perform all transmission operations performed by the first communication device in the embodiments shown in Figures 6 to 14, and / or to support other processes of the technology described herein.

[0549] As another possible implementation, the transmission module 1501 in FIG15 can be replaced by a transceiver, which can integrate the functions of the transmission module 1501; the processing module 1502 can be replaced by a processor, which can integrate the functions of the processing module 1502. Furthermore, the communication device 150 shown in FIG15 can also include a memory.

[0550] Alternatively, when the processing module 1502 is replaced by a processor and the transmission module 1501 is replaced by a transceiver, the communication device 150 involved in the embodiment of the present application can also be the communication device 160 shown in Figure 16. The processor can be the logic circuit 1601, and the transceiver can be the interface circuit 1602. Furthermore, the communication device 160 shown in Figure 16 can also include a memory 1603.

[0551] The embodiments of the present application also provide a computer program product, which, when executed by a computer, can implement the functions of any of the above method embodiments.

[0552] The embodiments of the present application also provide a computer program, which, when executed by a computer, can implement the functions of any of the above method embodiments.

[0553] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be an internal storage unit of the terminal (including the data sending end and / or the data receiving end) of any of the above-mentioned embodiments, such as the hard disk or memory of the terminal. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned terminal, such as a plug-in hard disk equipped on the above-mentioned terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned terminal and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0554] It should be noted that the terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. "First" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "multiple" means two or more.

[0555] Furthermore, the terms "include," "comprise," and "have," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0556] It should be understood that in this application, "at least one (item)" refers to one or more. "Multiple" refers to two or more. "At least two (items)" refers to two or three and more than three. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple. “When” and “if” both mean that corresponding measures will be taken under certain objective circumstances. They do not limit the time, nor do they require any judgment action when they are implemented, nor do they mean that there are other limitations.

[0557] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0558] In this application, "sending information to ... (a terminal device)" can be understood as the destination of the information being the terminal device. This can include sending information directly or indirectly to the terminal device. "Receiving information from ... (a terminal device)" can be understood as the source of the information being the terminal device. This can include receiving information directly or indirectly from the terminal device. The information may undergo necessary processing between the source and destination, such as formatting changes, but the destination can still understand the valid information from the source.

[0559] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0560] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0561] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0562] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0563] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Claims

1. A communication method, characterized in that: include: An orthogonal frequency division multiplexing OFDM symbol is transmitted through a first resource unit; wherein the first resource unit includes 17 groups of subcarriers and 1 single subcarrier, and each group of subcarriers includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in a frequency domain order; The first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, The first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete.

2. The method according to claim 1, characterized in that: When the first subcarrier and the second subcarrier are discrete, the number of subcarriers between the first subcarrier and the second subcarrier is greater than or equal to 3; or When the second subcarrier and the third subcarrier are discrete, the number of subcarriers spaced between the second subcarrier and the third subcarrier is greater than or equal to 3.

3. The method according to claim 1 or 2, characterized in that: The 20 MHz includes 4 of the first resource units; The first subcarriers in the nth group of subcarriers of the four first resource units are continuous, and / or the second subcarrier and the third subcarrier in the nth group of subcarriers of the four first resource units are continuous, n=1, 2, ..., 17; or The first subcarrier and the second subcarrier in the nth group of subcarriers of the four first resource units are continuous, and / or, the third subcarriers in the nth group of subcarriers of the four first resource units are continuous, n=1,2,…,17.

4. The method according to any one of claims 1 to 3, characterized in that: The indexes of subcarriers included in the first resource unit are: -122, -118, -117, -108, -104, -103, -94, -90, -89, -80, -76, -75, -66, -62, -61, -52, -48, -47, -38, -34, -33, -25, -21, -20, -12, -8, -7, 9, 13, 14, 22, 26, 27, 36, 40, 41, 50, 54, 55, 64, 68, 69, 78, 82, 83, 92, 96, 97, 106, 110, 111, 119; or The indexes of subcarriers included in the first resource unit are: -121, -116, -115, -107, -102, -101, -93, -88, -87, -79, -74, -73, -65, -60, -59, -51, -46, -45, -37, -32, -31, -24, -19, -18, -11, -6, -5, 10, 15, 16, 23, 28, 29, 37, 42, 43, 51, 56, 57, 65, 70, 71, 79, 84, 85, 93, 98, 99, 107, 112, 113, 120; or The indexes of subcarriers included in the first resource unit are: -120, -114, -113, -106, -100, -99, -92, -86, -85, -78, -72, -71, -64, -58, -57, -50, -44, -43, -36, -30, -29, -23, -17, -16, -10, -4, -3, 11, 17, 18, 24, 30, 31, 38, 44, 45, 52, 58, 59, 66, 72, 73, 80, 86, 87, 94, 100, 101, 108, 114, 115, 121; or The indexes of subcarriers included in the first resource unit are: -119, -112, -111, -105, -98, -97, -91, -84, -83, -77, -70, -69, -63, -56, -55, -49, -42, -41, -35, -28, -27, -22, -15, -14, -9, -2, 2, 12, 19, 20, 25, 32, 33, 39, 46, 47, 53, 60, 61, 67, 74, 75, 81, 88, 89, 95, 102, 103, 109, 116, 117, 122.

5. The method according to any one of claims 1 to 4, characterized in that: The subcarriers included in the first resource unit are the same as the subcarriers included in the two second resource units, and the second resource unit includes the odd-numbered subcarriers in the first resource unit; or, the second resource unit includes the even-numbered subcarriers in the first resource unit.

6. The method according to any one of claims 1 to 5, characterized in that: The subcarriers included in the first resource unit are a subset of the subcarriers included in the third resource unit, and the third resource unit includes two of the first resource units and two single subcarriers.

7. The method according to claim 6, characterized in that The third resource unit includes the first first resource unit, the third first resource unit, the single subcarrier with an index of 3, and the single subcarrier with an index of 5; or The third resource unit includes the second first resource unit, the fourth first resource unit, a single subcarrier with an index of 4, and a single subcarrier with an index of 6.

8. The method according to any one of claims 1 to 7, characterized in that: The first resource unit includes 4 discrete pilot subcarriers; When the second subcarrier and the third subcarrier are continuous, the four discrete pilot subcarriers are four discrete subcarriers among the 17 second subcarriers and the 17 third subcarriers; or When the first subcarrier and the second subcarrier are continuous, the four discrete pilot subcarriers are 17 of the first subcarriers and 17 Four discrete subcarriers among the second subcarriers.

9. The method according to any one of claims 1 to 8, characterized in that: 20MHz includes 4 of the first resource units; When the second subcarrier and the third subcarrier are continuous, one of the four second subcarriers and the four third subcarriers corresponding to the mth group of subcarriers arranged in frequency domain order in the four first resource units is a pilot subcarrier, and m=1, 2, ..., 7, 8, 10, 11, ..., 17; or When the first subcarrier and the second subcarrier are continuous, one of the four first subcarriers and the four second subcarriers corresponding to the mth group of subcarriers arranged in frequency domain order in the four first resource units is a pilot subcarrier, and m=1, 2, ..., 7, 8, 10, 11, ..., 17.

10. The method according to any one of claims 1 to 9, characterized in that: The four pilot subcarriers included in the first resource unit are respectively located in the 1st, 5th, 10th and 14th groups of subcarriers arranged in frequency domain order; or The four pilot subcarriers included in the first resource unit are respectively located in the 2nd, 6th, 11th and 15th groups of subcarriers arranged in frequency domain order; or The four pilot subcarriers included in the first resource unit are respectively located in the 3rd, 7th, 12th and 16th groups of subcarriers arranged in frequency domain order; or The four pilot subcarriers included in the first resource unit are respectively located in the 4th, 8th, 13th and 17th groups of subcarriers arranged in frequency domain order.

11. The method according to any one of claims 1 to 10, characterized in that: The two pilot subcarriers in the first resource unit are odd-numbered subcarriers of the first resource unit, and the other two pilot subcarriers are even-numbered subcarriers of the first resource unit.

12. The method according to any one of claims 1 to 11, characterized in that: The indexes of the pilot subcarriers included in the first resource unit are: -112, -56, 19, 74; or The index of the pilot subcarrier included in the first resource unit is: -112, -55, 20, 74; or The indexes of the pilot subcarriers included in the first resource unit are: -112, -55, 19, 75; or The indexes of the pilot subcarriers included in the first resource unit are: -111, -56, 20, 74; or The indexes of the pilot subcarriers included in the first resource unit are: -111, -56, 19, 75; or The indexes of the pilot subcarriers included in the first resource unit are: -111, -55, 20, 75.

13. The method according to any one of claims 1 to 11, characterized in that: The indexes of the pilot subcarriers included in the first resource unit are: -99, -43, 31, 87; or The indexes of the pilot subcarriers included in the first resource unit are: -99, -44, 30, 87; or The indexes of the pilot subcarriers included in the first resource unit are: -99, -44, 31, 86; or The indexes of the pilot subcarriers included in the first resource unit are: -100, -43, 30, 87; or The indexes of the pilot subcarriers included in the first resource unit are: -100, -43, 31, 86; or The indexes of the pilot subcarriers included in the first resource unit are: -100, -44, 30, 86.

14. The method according to any one of claims 1 to 11, characterized in that: The indexes of the pilot subcarriers included in the first resource unit are: -88, -32, 42, 98; or The indexes of the pilot subcarriers included in the first resource unit are: -88, -31, 43, 98; or The indexes of the pilot subcarriers included in the first resource unit are: -88, -31, 42, 99; or The indexes of the pilot subcarriers included in the first resource unit are: -87, -32, 43, 98; or The indexes of the pilot subcarriers included in the first resource unit are: -87, -32, 42, 99; or The indexes of the pilot subcarriers included in the first resource unit are: -87, -31, 43, 99.

15. The method according to any one of claims 1 to 11, characterized in that: The indexes of the pilot subcarriers included in the first resource unit are: -75, -20, 55, 111; or The indexes of the pilot subcarriers included in the first resource unit are: -75, -21, 54, 111; or The indexes of the pilot subcarriers included in the first resource unit are: -75, -21, 55, 110; or The indexes of the pilot subcarriers included in the first resource unit are: -76, -20, 54, 111; or The indexes of the pilot subcarriers included in the first resource unit are: -76, -20, 55, 110; or The indexes of the pilot subcarriers included in the first resource unit are: -76, -21, 54, 110.

16. The method according to any one of claims 1 to 15, characterized in that: The pilot subcarriers included in the first resource unit are the same as the pilot subcarriers included in the two second resource units, and the pilot subcarriers included in the second resource unit are the two pilot subcarriers whose sorting sequence is odd among the subcarriers of the first resource unit; or, the pilot subcarriers included in the second resource unit are the two pilot subcarriers whose sorting sequence is even among the subcarriers of the first resource unit.

17. The method according to any one of claims 1 to 16, characterized in that: The subcarriers included in the first resource unit are a subset of the subcarriers included in the third resource unit, the third resource unit includes 2 of the first resource units and 2 single subcarriers, and the pilot subcarriers included in the third resource unit are 4 pilot subcarriers among the 8 pilot subcarriers included in the 2 first resource units.

18. The method according to claim 17, characterized in that The pilot subcarriers included in the third resource unit are four pilot subcarriers included in one of the two first resource units.

19. The method according to claim 17 or 18, characterized in that The pilot subcarriers included in the third resource unit are the four pilot subcarriers included in the first first resource unit; or The pilot subcarriers included in the third resource unit are the four pilot subcarriers included in the fourth first resource unit.

20. A communication method, characterized in that: include: Transmitting orthogonal frequency division multiplexing OFDM symbols through a second resource unit; wherein the two second resource units include 17 groups of subcarriers and 1 single subcarrier, and each group of subcarriers includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in a frequency domain order; The first subcarrier and the second subcarrier are discrete, and the second subcarrier and the third subcarrier are continuous; or, The first subcarrier and the second subcarrier are continuous, and the second subcarrier and the third subcarrier are discrete.

21. The method according to claim 20, characterized in that When the first subcarrier and the second subcarrier are discrete, the number of subcarriers between the first subcarrier and the second subcarrier is greater than or equal to 3; or When the second subcarrier and the third subcarrier are discrete, the number of subcarriers spaced between the second subcarrier and the third subcarrier is greater than or equal to 3.

22. The method according to claim 20 or 21, characterized in that The indexes of subcarriers included in the second resource unit are: -122, -117, -104, -94, -89, -76, -66, -61, -48, -38, -33, -21, -12, -7, 13, 22, 27, 40, 50, 55, 68, 78, 83, 96, 106, 111; or The indexes of subcarriers included in the second resource unit are: -118, -108, -103, -90, -80, -75, -62, -52, -47, -34, -25, -20, -8, 9, 14, 26, 36, 41, 54, 64, 69, 82, 92, 97, 110, 119; or The indexes of subcarriers included in the second resource unit are: -121, -115, -102, -93, -87, -74, -65, -59, -46, -37, -31, -19, -11, -5, 15, 23, 29, 42, 51, 57, 70, 79, 85, 98, 107, 113; or The indexes of subcarriers included in the second resource unit are: -116, -107, -101, -88, -79, -73, -60, -51, -45, -32, -24, -18, -6, 10, 16, 28, 37, 43, 56, 65, 71, 84, 93, 99, 112, 120; or The indexes of subcarriers included in the second resource unit are: -120, -113, -100, -92, -85, -72, -64, -57, -44, -36, -29, -17, -10, -3, 17, 24, 31, 44, 52, 59, 72, 80, 87, 100, 108, 115; or The indexes of subcarriers included in the second resource unit are: -114, -106, -99, -86, -78, -71, -58, -50, -43, -30, -23, -16, -4, 11, 18, 30, 38, 45, 58, 66, 73, 86, 94, 101, 114, 121; or The subcarrier indexes included in the second resource unit are: -119, -111, -98, -91, -83, -70, -63, -55, -42, -35, -27, -15, -9, 2, 19, 25, 33, 46, 53, 61, 74, 81, 89, 102, 109, 117; or The indexes of subcarriers included in the second resource unit are: -112, -105, -97, -84, -77, -69, -56, -49, -41, -28, -22, -14, -2, 12, 20, 32, 39, 47, 60, 67, 75, 88, 95, 103, 116, 122.

23. The method according to any one of claims 20 to 22, characterized in that: The second resource unit includes 2 discrete pilot subcarriers; When the second subcarrier and the third subcarrier are continuous, the four discrete pilot subcarriers included in the two second resource units are four discrete subcarriers among the 17 second subcarriers and the 17 third subcarriers; or When the first subcarrier and the second subcarrier are continuous, the four discrete pilot subcarriers included in the two second resource units are four discrete subcarriers among the 17 first subcarriers and the 17 second subcarriers.

24. The method according to any one of claims 20 to 23, characterized in that: The index of the pilot subcarrier included in the second resource unit is: -112, -56; or, the index of the pilot subcarrier included in the second resource unit is: 19, 74; or The index of the pilot subcarrier included in the second resource unit is: -112, 20; or, the index of the pilot subcarrier included in the second resource unit is: -55, 74; or The indexes of the pilot subcarriers included in the second resource unit are: -112, 75; or, the indexes of the pilot subcarriers included in the second resource unit are: -55, 19; or The index of the pilot subcarrier included in the second resource unit is: -111, 74; or, the index of the pilot subcarrier included in the second resource unit is: -56, 20; or The index of the pilot subcarrier included in the second resource unit is: -111, 19; or, the index of the pilot subcarrier included in the second resource unit is: -56, 75; or The indexes of the pilot subcarriers included in the second resource unit are: -111, -55; or the indexes of the pilot subcarriers included in the second resource unit are: 20, 75.

25. The method according to any one of claims 20 to 23, characterized in that: The index of the pilot subcarrier included in the second resource unit is: -99, -43; or, the index of the pilot subcarrier included in the second resource unit is: 31, 87; or The indexes of the pilot subcarriers included in the second resource unit are: -99, 30; or, the indexes of the pilot subcarriers included in the second resource unit are: -44, 87; or The index of the pilot subcarrier included in the second resource unit is: -99, 86; or, the index of the pilot subcarrier included in the second resource unit is: -44, 31; or The indexes of the pilot subcarriers included in the second resource unit are: -43, 30; or, the indexes of the pilot subcarriers included in the second resource unit are: -100, 87; or The index of the pilot subcarrier included in the second resource unit is: -43, 86; or, the index of the pilot subcarrier included in the second resource unit is: -100, 31; or The indexes of the pilot subcarriers included in the second resource unit are: 30, 86; or the indexes of the pilot subcarriers included in the second resource unit are: -100, -44.

26. The method according to any one of claims 20 to 23, characterized in that: The index of the pilot subcarrier included in the second resource unit is: -88, -32; or, the index of the pilot subcarrier included in the second resource unit is: 42, 98; or The indexes of the pilot subcarriers included in the second resource unit are: -88, 43; or, the indexes of the pilot subcarriers included in the second resource unit are: -31, 98; or The index of the pilot subcarrier included in the second resource unit is: -88, 99; or, the index of the pilot subcarrier included in the second resource unit is: -31, 42; or The index of the pilot subcarrier included in the second resource unit is: -32, 43; or, the index of the pilot subcarrier included in the second resource unit is: -87, 98; or The index of the pilot subcarrier included in the second resource unit is: -32, 99; or, the index of the pilot subcarrier included in the second resource unit is: -87, 42; or The indexes of the pilot subcarriers included in the second resource unit are: 43, 99; or the indexes of the pilot subcarriers included in the second resource unit are: -87, -31.

27. The method according to any one of claims 20 to 23, characterized in that: The index of the pilot subcarrier included in the second resource unit is: -75, -20; or, the index of the pilot subcarrier included in the second resource unit is: 55, 111; or The index of the pilot subcarrier included in the second resource unit is: -75, 54; or, the index of the pilot subcarrier included in the second resource unit is: -21, 111; or The index of the pilot subcarrier included in the second resource unit is: -75, 110; or, the index of the pilot subcarrier included in the second resource unit is: -21, 55; or The index of the pilot subcarrier included in the second resource unit is: -20, 54; or, the index of the pilot subcarrier included in the second resource unit is The index is: -76, 111; or The index of the pilot subcarrier included in the second resource unit is: -20, 110; or, the index of the pilot subcarrier included in the second resource unit is: -76, 55; or The indexes of the pilot subcarriers included in the second resource unit are: 54, 110; or the indexes of the pilot subcarriers included in the second resource unit are: -76, -21.

28. A communication method, characterized in that: include: Orthogonal frequency division multiplexing (OFDM) symbols are transmitted through a third resource unit; wherein the third resource unit includes 17 groups of subcarriers and 4 single subcarriers, each group of subcarriers includes a fourth subcarrier, a fifth subcarrier, a sixth subcarrier, a seventh subcarrier, an eighth subcarrier, and a ninth subcarrier arranged in frequency domain order; the fourth subcarrier and the fifth subcarrier are discrete, the fifth subcarrier and the sixth subcarrier are discrete, the sixth subcarrier and the seventh subcarrier are continuous, the seventh subcarrier and the eighth subcarrier are discrete, and the eighth subcarrier and the ninth subcarrier are continuous.

29. The method according to claim 28, characterized in that The number of subcarriers spaced between the fourth subcarrier and the fifth subcarrier is greater than or equal to 1; and / or The number of subcarriers spaced between the fifth subcarrier and the sixth subcarrier is greater than or equal to 1; and / or The number of subcarriers spaced between the seventh subcarrier and the eighth subcarrier is greater than or equal to 2.

30. The method according to claim 28 or 29, characterized in that The 20 MHz includes 2 third resource units; The fourth subcarriers in the nth group of subcarriers of the two third resource units are continuous, and / or, The fifth subcarriers in the nth group of subcarriers of the two third resource units are continuous, and / or, The sixth subcarrier and the seventh subcarrier in the nth group of subcarriers of the two third resource units are continuous, and / or, The eighth subcarrier and the ninth subcarrier in the nth group of subcarriers of the two third resource units are continuous, where n=1, 2, ..., 17.

31. The method according to claim 30, characterized in that The fourth subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the fifth subcarrier in the nth group of subcarriers of the first third resource unit; and / or The fifth subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the sixth subcarrier in the nth group of subcarriers of the first third resource unit; and / or The seventh subcarrier in the nth group of subcarriers of the second third resource unit is continuous with the eighth subcarrier in the nth group of subcarriers of the first third resource unit.

32. The method according to any one of claims 28 to 31, characterized in that: The indexes of the subcarriers included in the third resource unit are: -122, -120, -118, -117, -114, -113, -108, -106, -104, -103, -100, -99, -94, -92, -90, -89, -86, -85, -80, -78, -76, -75, -72, -71, -66, -64, -62, -61, -58, -57, -52, -50, -48, -47, -44, -43, -38, -36, -34, -33, -30, -29, -25, - 23, -21, -20, -17, -16, -12, -10, -8, -7, -4, -3, 3, 5, 9, 11, 13, 14, 17, 18, 22, 24, 26, 27, 30, 31, 36, 38, 40, 41, 44, 45, 50, 52, 54, 55, 58, 59, 64, 66, 68, 69, 72, 73, 78, 80, 82, 83, 86, 87, 92, 94, 96, 97, 100, 101, 106, 108, 110, 111, 114, 115, 119, 121; or The indexes of the subcarriers included in the third resource unit are: -121, -119, -116, -115, -112, -111, -107, -105, -102, -101, -98, -97, -93, -91, -88, -87, -84, -83, -79, -77, -74, -73, -70, -69, -65, -63, -60, -59, -56, -55, -51, -49, -46, -45, -42, -41, -37, -35, -32, -31, -28, -27, -24, 70, 71, 74, 75, 79, 81, 84, 85, 88, 89, 93, 95, 98, 99, 102, 103, 107, 109, 112, 113, 116, 117, 120, 122.

33. The method according to any one of claims 28 to 32, characterized in that: The subcarriers included in the third resource unit include subcarriers included in two first resource units, and the first resource unit includes 17 groups of subcarriers and 1 single subcarrier; Each group of subcarriers includes the fourth subcarrier, the sixth subcarrier and the seventh subcarrier arranged in frequency domain order; the fourth subcarrier and the sixth subcarrier are discrete; or Each group of subcarriers includes the fifth subcarrier, the eighth subcarrier and the ninth subcarrier arranged in frequency domain order; the fifth subcarrier and the eighth subcarrier are discrete.

34. The method according to any one of claims 28 to 33, characterized in that The third resource unit includes 4 discrete pilot subcarriers; the 4 discrete pilot subcarriers are 4 discrete subcarriers among the 17 sixth subcarriers, the 17 seventh subcarriers, the 17 eighth subcarriers and the 17 ninth subcarriers.

35. The method according to any one of claims 28 to 34, characterized in that The four discrete pilot subcarriers are four discrete subcarriers among the 17 sixth subcarriers and the 17 seventh subcarriers; or The four discrete pilot subcarriers are four discrete subcarriers among the 17 eighth subcarriers and the 17 ninth subcarriers.

36. The method according to any one of claims 28 to 35, characterized in that The four pilot subcarriers included in the third resource unit are respectively located in the 1st, 5th, 10th and 14th groups of subcarriers arranged in frequency domain order; or The four pilot subcarriers included in the third resource unit are respectively located in the 2nd, 6th, 11th and 15th groups of subcarriers arranged in frequency domain order; or The four pilot subcarriers included in the third resource unit are respectively located in the 3rd, 7th, 12th and 16th groups of subcarriers arranged in frequency domain order; or The four pilot subcarriers included in the third resource unit are respectively located in the 4th, 8th, 13th and 17th groups of subcarriers arranged in frequency domain order.

37. The method according to any one of claims 28 to 36, characterized in that: The indexes of the pilot subcarriers included in the third resource unit are: -112, -56, 19, 74; or The indexes of the pilot subcarriers included in the third resource unit are: -112, -55, 20, 74; or The indexes of the pilot subcarriers included in the third resource unit are: -112, -55, 19, 75; or The indexes of the pilot subcarriers included in the third resource unit are: -111, -56, 20, 74; or The indexes of the pilot subcarriers included in the third resource unit are: -111, -56, 19, 75; or The indexes of the pilot subcarriers included in the third resource unit are: -111, -55, 20, 75.

38. The method according to any one of claims 28 to 36, characterized in that: The indexes of the pilot subcarriers included in the third resource unit are: -99, -43, 31, 87; or The indexes of the pilot subcarriers included in the third resource unit are: -99, -44, 30, 87; or The indexes of the pilot subcarriers included in the third resource unit are: -99, -44, 31, 86; or The indexes of the pilot subcarriers included in the third resource unit are: -100, -43, 30, 87; or The indexes of the pilot subcarriers included in the third resource unit are: -100, -43, 31, 86; or The indexes of the pilot subcarriers included in the third resource unit are: -100, -44, 30, 86.

39. The method according to any one of claims 28 to 36, characterized in that: The indexes of the pilot subcarriers included in the third resource unit are: -88, -32, 42, 98; or The indexes of the pilot subcarriers included in the third resource unit are: -88, -31, 43, 98; or The indexes of the pilot subcarriers included in the third resource unit are: -88, -31, 42, 99; or The indexes of the pilot subcarriers included in the third resource unit are: -87, -32, 43, 98; or The indexes of the pilot subcarriers included in the third resource unit are: -87, -32, 42, 99; or The indexes of the pilot subcarriers included in the third resource unit are: -87, -31, 43, 99.

40. The method according to any one of claims 28 to 36, characterized in that The indexes of the pilot subcarriers included in the third resource unit are: -75, -20, 55, 111; or The indexes of the pilot subcarriers included in the third resource unit are: -75, -21, 54, 111; or The indexes of the pilot subcarriers included in the third resource unit are: -75, -21, 55, 110; or The indexes of the pilot subcarriers included in the third resource unit are: -76, -20, 54, 111; or The indexes of the pilot subcarriers included in the third resource unit are: -76, -20, 55, 110; or The indexes of the pilot subcarriers included in the third resource unit are: -76, -21, 54, 110.

41. The method according to any one of claims 1-3, 5-11, 16-21, 23, 28-31, 33-36, characterized in that: The 20 MHz bandwidth includes 15 guard subcarriers, of which 8 guard subcarriers are located in the low-frequency edge region of 20 MHz and 7 guard subcarriers are located in the high-frequency edge region of 20 MHz.

42. The method according to claim 41, characterized in that Transmitting, by the DRU, OFDM symbols within a discrete bandwidth of 20 MHz in the first bandwidth; The subcarrier index of the DRU in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in the 20 MHz bandwidth plus ax, a is the number of protection subcarriers on the first side of the first bandwidth, and x is the number of protection subcarriers on the first side of the 20 MHz bandwidth, and a and x are both positive integers; or The subcarrier index of the DRU in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the 20MHz bandwidth minus by, b is the number of protection subcarriers on the second side of the first bandwidth, y is the number of protection subcarriers on the second side of the 20MHz bandwidth, and b and y are both positive integers.

43. The method according to claim 42, characterized in that a is 12, b is 11, x is 8, and y is 7.

44. The method according to claim 42 or 43, characterized in that The transmitting of OFDM symbols by the DRU within the 20 MHz discrete bandwidth in the first bandwidth includes: Within the 20 MHz discrete bandwidth, OFDM symbols are transmitted by a DRU that does not include one or more of the following subcarriers: a subcarrier with an index of -1, a subcarrier with an index of 0, or a subcarrier with an index of 1.

45. The method according to claim 41, characterized in that Transmitting orthogonal frequency division multiplexing OFDM symbols through a distributed resource unit DRU within a 20 MHz discrete bandwidth in the first bandwidth; The subcarrier index of the DRU in the nth region in the 20 MHz discrete bandwidth is the subcarrier index of the DRU in the n'th region in the 20 MHz bandwidth plus the nth value; n=n'=1, 2, ..., N; N is a positive integer.

46. ​​The method according to claim 45, characterized in that The subcarrier index of the DRU in the 20MHz discrete bandwidth in the first region is the subcarrier index of the DRU in the 20MHz bandwidth in the first' region plus ax; The subcarrier index of the DRU in the 20MHz discrete bandwidth in the second region is the subcarrier index of the DRU in the 20MHz bandwidth in the 2' region plus P; The subcarrier index of the DRU in the 20MHz discrete bandwidth in the third region is the subcarrier index of the DRU in the 20MHz bandwidth in the 3' region plus Q; Wherein, a is the number of guard subcarriers on the first side of the first bandwidth, x is the number of guard subcarriers on the first side of the 20 MHz bandwidth, and a, x, P and Q are all positive integers.

47. The method according to claim 46, characterized in that a is 12, x is 8, P is 7, and Q is 5.

48. The method according to claim 46 or 47, characterized in that The first region includes the (a+1)th subcarrier to the (T+ax)th subcarrier arranged in frequency domain order in the 20 MHz discrete bandwidth; the 1'th region includes the (x+1)th subcarrier to the Tth subcarrier arranged in frequency domain order in the 20 MHz bandwidth; The second region includes the (T+1+P)th subcarrier to the (128-(K-1) / 2+P)th subcarrier arranged in frequency domain order in the 20 MHz discrete bandwidth; the 2' region includes the (T+1)th subcarrier to the (128-(K-1) / 2)th subcarrier arranged in frequency domain order in the 20 MHz bandwidth; The third region includes the (130+(K-1) / 2+Q)th subcarrier to the (256-y+Q)th subcarrier arranged in frequency domain order in the 20 MHz discrete bandwidth; the 3'th region includes the (130+(K-1) / 2)th subcarrier to the (256-y)th subcarrier arranged in frequency domain order in the 20 MHz bandwidth; Wherein, K is the number of DC subcarriers in the 20 MHz bandwidth, y is the number of protection subcarriers on the second side of the 20 MHz bandwidth, and K, T and y are all positive integers.

49. The method according to claim 48, characterized in that T is 123, K is 3, and y is 7.

50. The method of claim 45, wherein: The subcarrier index of the DRU in the 20MHz discrete bandwidth in the first region is the subcarrier index of the DRU in the 20MHz bandwidth in the 1' region plus -Q; The subcarrier index of the DRU in the 20 MHz discrete bandwidth in the second region is the subcarrier index of the DRU in the 20 MHz bandwidth in the second region. The subcarrier index of the region plus -P; The subcarrier index of the DRU in the 20 MHz discrete bandwidth in the third region is the subcarrier index of the DRU in the 20 MHz bandwidth in the 3' region plus - (by); Among them, b is the number of protection subcarriers on the second side of the first bandwidth, y is the number of protection subcarriers on the second side of the 20 MHz bandwidth, and b, y, P and Q are all positive integers.

51. The method according to claim 50, characterized in that b is 11, y is 7, P is 7, and Q is 5.

52. The method according to claim 50 or 51, characterized in that The first region includes the (x+1-Q)th subcarrier to the (128-(K-1) / 2-Q)th subcarrier arranged in frequency domain order in the 20 MHz discrete bandwidth; the 1'th region includes the (x+1)th subcarrier to the (128-(K-1) / 2)th subcarrier arranged in frequency domain order in the 20 MHz bandwidth; The second region includes the (130+(K-1) / 2-P)th subcarrier to the (SP)th subcarrier arranged in frequency domain order in the 20 MHz discrete bandwidth; the 2'th region includes the (130+(K-1) / 2)th subcarrier to the Sth subcarrier arranged in frequency domain order in the 20 MHz bandwidth; The third region includes the (S+1-b+y)th subcarrier to the (256-b)th subcarrier arranged in frequency domain order in the 20 MHz discrete bandwidth; the 3'th region includes the (S+1)th subcarrier to the (256-y)th subcarrier arranged in frequency domain order in the 20 MHz bandwidth; Among them, K is the number of DC subcarriers in the 20 MHz bandwidth, x is the number of protection subcarriers on the first side of the 20 MHz bandwidth, and K, S and x are all positive integers.

53. The method according to claim 52, characterized in that The S is 134, the K is 3, and the x is 8.

54. A communication device, characterized in that: It comprises a module or a unit for executing the communication method as described in any one of claims 1-19, 41-53.

55. A communication device, characterized in that: The device comprises a module or a unit for executing the communication method as described in any one of claims 20-27, 41-53.

56. A communication device, characterized in that: The device comprises a module or a unit for executing the communication method as described in any one of claims 28-40, 41-53.

57. A communication device, characterized in that: The communication device includes one or more transceivers, which, under the control of a processor, execute the communication method as described in any one of claims 1-19, 41-53, or execute the communication method as described in any one of claims 20-27, 41-53, or execute the communication method as described in any one of claims 28-40, 41-53.

58. The communication device according to claim 57, characterized in that The communication device further comprises a memory for storing the computer program or instructions.

59. A communication device, characterized in that: The communication device includes an interface circuit; the interface circuit is used to execute the communication method described in any one of claims 1-19, 41-53, or execute the communication method described in any one of claims 20-27, 41-53, or execute the communication method described in any one of claims 28-40, 41-53 under the control of the logic circuit.

60. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions or programs, which, when executed on a computer, cause the communication method described in any one of claims 1-19, 41-53 to be executed, or cause the communication method described in any one of claims 20-27, 41-53 to be executed, or cause the communication method described in any one of claims 28-40, 41-53 to be executed.

61. A computer program product, characterized in that The computer program product includes computer instructions; when part or all of the computer instructions are run on a computer, the communication method described in any one of claims 1-19, 41-53 is executed, or the communication method described in any one of claims 20-27, 41-53 is executed, or the communication method described in any one of claims 28-40, 41-53 is executed.

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