Communication method and device

Abstract

The invention discloses a communication method and device, relates to the technical field of communication, and can improve system throughput while enabling a resource unit (RU) to amplify power as much as possible. The method comprises the following steps: transmitting an orthogonal frequency division multiplexing (OFDM) symbol through a first resource unit; wherein the first resource unit comprises 17 groups of subcarriers and one single subcarrier, and each group of subcarriers comprises a first subcarrier, a second subcarrier and a third subcarrier which are arranged according to a frequency domain sequence; 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 method and the device are suitable for a wireless local area network (WLAN) supporting the IEEE related standards, and the IEEE related standards comprise the 802.11 a / b / g standard, the 802.11 n standard, the 802.11 ac standard, the 802.11 ax standard, the 802.11 be standard, the 802.11 bn standard / UHR standard / WiFi standard, the 802.11 ad standard, the 802.11 ay standard, the 802.11 bf standard / sensing standard, the UWB standard / 802.15 standard and the like.

Description

[0001] This application claims the priority of 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”, and the priority of 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”, all contents of which are incorporated by reference in 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 through a resource unit (RU). However, due to the limitations of maximum power and maximum power spectrum density, there is still room for further power amplification in the design of existing RUs.

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

[0005] The present application provides a communication method and device, which can enable RU to increase system throughput while amplifying power as much as possible.

[0006] 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 implement 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.

[0007] 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 to 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 about 2 / 3 of the subcarriers), improve the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] In one possible design, 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.

[0014] In one possible design, 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.

[0015] In one possible design, 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.

[0016] In one possible design, 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.

[0017] Based on the above four possible designs, multiple feasible solutions are provided for the design of the first resource unit.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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, so as to provide a variety of feasible solutions for the design of resource units.

[0022] 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.

[0023] 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 accuracy of phase deviation estimation and reducing the packet error rate.

[0024] In one possible design, 20MHz includes 4 first resource units; when the second subcarrier and the third subcarrier are continuous, there is a subcarrier as a pilot 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, and m = 1, 2, ..., 7, 8, 10, 11, ..., 17.

[0025] In one possible design, 20MHz includes 4 first resource units; when the first subcarrier and the second subcarrier are continuous, there is a subcarrier as a pilot 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, and m = 1, 2, ..., 7, 8, 10, 11, ..., 17.

[0026] Based on the above two possible designs, each first resource unit contains 17 groups of paired subcarriers (i.e., continuous subcarriers). For the 4 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 that the pilot subcarriers of the same / different first resource units are too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0027] In one possible design, the 4 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 4 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 4 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 4 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.

[0028] Based on this possible design, the pilot subcarriers can be distributed more evenly, and the pilot subcarriers of the first resource unit can be prevented from being too close, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0029] In one possible design, 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.

[0030] Based on this possible design, when two second resource units are determined according to the first resource unit, it can be ensured that each second resource unit can include 2 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 2 pilot subcarriers with odd sorting numbers among the subcarriers of the first resource unit, and the second resource unit is determined according to the odd-numbered subcarriers in the first resource unit; or, the pilot subcarriers included in the second resource unit are the 2 pilot subcarriers with even sorting numbers among the subcarriers of the first resource unit, and the second resource unit is determined according to the even-numbered subcarriers in the first resource unit.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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 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.

[0037] Based on this possible design, the pilot subcarriers included in the second resource unit may also be determined according to the pilot subcarriers included in the first resource unit.

[0038] 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.

[0039] Based on this possible design, the pilot subcarriers can be distributed more evenly, and the pilot subcarriers of the third resource unit can be prevented from being too close, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0040] 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.

[0041] Based on this possible design, the pilot subcarriers can be distributed more evenly, and the pilot subcarriers of the third resource unit can be prevented from being too close, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0042] 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.

[0043] Based on this possible design, the pilot subcarrier of the first third resource unit is the 4 pilot subcarriers included in the first first resource unit. At the same time, the pilot subcarrier of the second third resource unit is the 4 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.

[0044] In the second 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 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.

[0045] 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, to obtain a better power amplification effect), that is, the above-mentioned second resource unit can achieve a larger power amplification factor.

[0046] 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.

[0047] Based on this possible design, the number of subcarriers spaced apart 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.

[0048] In one possible design, the subcarriers included in the second resource unit have indexes of -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.

[0049] In one possible design, 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, and 119.

[0050] In one possible design, the subcarriers included in the second resource unit have indexes of -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.

[0051] In one possible design, 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, and 120.

[0052] In one possible design, the subcarriers included in the second resource unit have indexes of -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.

[0053] In one possible design, 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.

[0054] In one possible design, the subcarriers included in the second resource unit have indexes of -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, and 117.

[0055] In one possible design, the subcarriers included in the second resource unit have indexes of -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.

[0056] Based on the above eight possible designs, a variety of feasible solutions are provided for the design of the second resource unit.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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. In 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.

[0062] 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.

[0063] In one possible design, 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 index of the pilot subcarrier included in the second resource unit is: -99, 30; or, the index of the pilot subcarrier included in the second resource unit is: -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, 3 1; or, the index of the pilot subcarriers included in the second resource unit is: -43, 30; or, the index of the pilot subcarriers included in the second resource unit is: -100, 87; or, the index of the pilot subcarriers included in the second resource unit is: -43, 86; or, the index of the pilot subcarriers included in the second resource unit is: -100, 31; or, the index of the pilot subcarriers included in the second resource unit is: 30, 86; or, the index of the pilot subcarriers included in the second resource unit is: -100, -44.

[0064] 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 index of the pilot subcarriers included in the second resource unit is: -32, 43; or, the index of the pilot subcarriers included in the second resource unit is: -87, 98; or, the index of the pilot subcarriers included in the second resource unit is: -32, 99; or, the index of the pilot subcarriers included in the second resource unit is: -87, 42; or, the index of the pilot subcarriers included in the second resource unit is: 43, 99; or, the index of the pilot subcarriers included in the second resource unit is: -87, -31.

[0065] 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 index of the pilot subcarriers included in the second resource unit is: -20, 54; or, the index of the pilot subcarriers included in the second resource unit is: -76, 111; or, the index of the pilot subcarriers included in the second resource unit is: -20, 110; or, the index of the pilot subcarriers included in the second resource unit is: -76, 55; or, the index of the pilot subcarriers included in the second resource unit is: 54, 110; or, the index of the pilot subcarriers included in the second resource unit is: -76, -21.

[0066] 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.

[0067] In 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.

[0068] 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 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 about 2 / 3 of the subcarriers), improve the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] Based on the above two possible designs, a variety of feasible solutions are provided for the design of the third resource unit.

[0077] In one possible design, the subcarriers included in the third resource unit 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.

[0078] In one possible design, the subcarriers included in the third resource unit 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 fifth subcarrier, an eighth subcarrier and a ninth subcarrier arranged in frequency domain order; the fifth subcarrier and the eighth subcarrier are discrete.

[0079] 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 the resource unit.

[0080] 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.

[0081] 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.

[0082] 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. In 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.

[0083] In one possible design, 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; or, 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; or, 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; or, 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.

[0084] Based on this possible design, the pilot subcarriers can be distributed more evenly, and the pilot subcarriers of the first resource unit can be prevented from being too close, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] In combination with the first to third aspects above, in a possible design, a 20 MHz bandwidth includes 15 protection subcarriers, of which 8 protection subcarriers are located in a low-frequency edge region of 20 MHz, and 7 protection subcarriers are located in a high-frequency edge region of 20 MHz.

[0091] Based on this possible design, the benefit of increasing the number of protection subcarriers is that it makes it easier for the transmitted signal to conform to the spectrum template, is more friendly to the design of the transceiver filter, and can also reduce interference to adjacent channels.

[0092] In combination with the first to third aspects above, in a possible design, orthogonal frequency division multiplexing OFDM symbols are transmitted through the DRU within a 20 MHz discrete bandwidth in the first bandwidth; wherein 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, 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 20 MHz discrete bandwidth is the subcarrier index of the DRU in the 20 MHz 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 20 MHz bandwidth, and b and y are both positive integers.

[0093] 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 by the present 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 in the first bandwidth based on the 20MHz discrete bandwidth, the communication performance can be improved.

[0094] 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 in the first bandwidth based on the 20MHz discrete bandwidth, the communication performance can be improved.

[0095] 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.

[0096] 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 the 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.

[0097] 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 the 20MHz-only site. Therefore, for the 20MHz-only site, communication can be carried out by using a DRU that does not include a DC subcarrier to improve communication performance.

[0098] In combination with the first to third aspects above, 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 20MHz discrete bandwidth in the nth area is the subcarrier index of the DRU in the 20MHz bandwidth in the n'th area plus the nth value; n = n' = 1, 2,…, N; N is a positive integer.

[0099] Based on this possible design, when scheduling and transmitting DRUs based on the 20MHz discrete bandwidth in the first bandwidth, the useful subcarriers in N regions based on the 20MHz bandwidth can be shifted on the spectrum of the 20MHz bandwidth to obtain the 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 can be unchanged, which is more friendly to 20MHz-only sites and improves communication performance.

[0100] In combination with the above-mentioned first to third aspects, in a 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 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 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.

[0101] In combination with the first to third aspects above, in a possible design, a is 12, x is 8, P is 7, and Q is 5.

[0102] In combination with the first to third aspects above, in a possible design, the first region includes the (a+1)th subcarrier to the (T+ax)th subcarrier arranged in frequency domain order in a 20MHz discrete bandwidth; the first' region includes the (x+1)th subcarrier to the Tth subcarrier arranged in frequency domain order in a 20MHz 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 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 a 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 a 20MHz discrete bandwidth. +1)th subcarrier to the (128-(K-1) / 2)th subcarrier; the third area 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 area includes the (130+(K-1) / 2)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, y is the number of protection subcarriers on the second side of the 20MHz bandwidth, and K, T and y are all positive integers.

[0103] In combination with the first to third aspects above, in a possible design, T is 123, K is 3, and y is 7.

[0104] 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 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.

[0105] In combination with the above-mentioned first to third aspects, in a 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.

[0106] In combination with the first to third aspects above, in one possible design, b is 11, y is 7, P is 7, and Q is 5.

[0107] In combination with the first to third aspects above, in a 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 are arranged in frequency domain order in the 20MHz bandwidth; the third area 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 area 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 protection subcarriers on the first side of the 20MHz bandwidth, and K, S and x are all positive integers.

[0108] In combination with the first to third aspects above, in a possible design, S is 134, K is 3, and x is 8.

[0109] 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 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.

[0110] 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 or a chip system or a system on chip of the first communication device, etc. The communication device can perform the functions performed by the first communication device through hardware, or 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 cooperate with the processing module to complete the following transmission operations; accordingly, the processing module can also independently complete the following processing operations, or cooperate with the transmission module to complete the following processing operations, without limitation.

[0111] 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.

[0112] 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, 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 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.

[0114] Optionally, the transmission module and the processing module of the communication device in the fourth aspect may also perform the corresponding functions in any possible design of the first aspect mentioned above, or perform the corresponding functions in any possible design of the second aspect mentioned above, or perform the corresponding functions in any possible design of the third aspect mentioned above. Please refer to the detailed description in the method example for details, and the beneficial effects that can be achieved can also be referred to the aforementioned related content.

[0115] In a fifth aspect, an embodiment of the present application provides a communication device, which includes one or more transceivers, and the transceiver executes the communication method described in any one of the first to third aspects under the control of a processor.

[0116] In one possible design, the communication device further includes one or more memories, the one or more memories are coupled to one or more processors, and the one or more memories are 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 inside 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, and the transceiver is used to receive information and / or send information.

[0117] 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.

[0118] 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 a logic circuit.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] In a tenth aspect, an embodiment of the present application provides a chip, comprising: a transceiver unit, the transceiver unit being used to execute the communication method as described in any one of the first to third aspects under the control of a processing unit.

[0123] Among them, the technical effects brought about by any design method 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.

[0124] 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

[0125] Figure 1 A schematic diagram of a 20 MHz subcarrier distribution provided in an embodiment of the present application;

[0126] Figure 2 A schematic diagram of a 40 MHz subcarrier distribution provided in an embodiment of the present application;

[0127] Figure 3 A schematic diagram of 80MHz subcarrier distribution provided in an embodiment of the present application;

[0128] Figure 4 A schematic diagram of a communication system provided in an embodiment of the present application;

[0129] Figure 5 A schematic diagram of the composition of a communication device provided in an embodiment of the present application;

[0130] Figure 6 A flow chart of a communication method provided in an embodiment of the present application;

[0131] Figure 7 A schematic diagram of an index of subcarriers included in a first resource unit provided in an embodiment of the present application;

[0132] Figure 8 A schematic diagram of the index of subcarriers included in a resource unit provided in an embodiment of the present application;

[0133] Fig. 9 A schematic diagram of an index of subcarriers included in a second resource unit provided in an embodiment of the present application;

[0134] Fig.10 A schematic diagram of an index of subcarriers included in a third resource unit provided in an embodiment of the present application;

[0135] Fig.11 A flow chart of a communication method provided in an embodiment of the present application;

[0136] Fig.12 A flow chart of a communication method provided in an embodiment of the present application;

[0137] Fig.13 A schematic diagram of uplink multi-user transmission provided in an embodiment of the present application;

[0138] Fig.14 A schematic diagram of a frame structure of a trigger frame provided in an embodiment of the present application;

[0139] Fig.15 A schematic diagram of a communication device provided in an embodiment of the present application;

[0140] Fig.16 A schematic diagram of a communication device provided in an embodiment of the present application;

[0141] Fig.17 A schematic diagram of a pilot subcarrier included in a resource unit provided in an embodiment of the present application;

[0142] Fig.18 A schematic diagram of a newly added protection subcarrier provided in an embodiment of the present application;

[0143] Fig.19 A schematic diagram of a second 20 MHz channel being punctured in an 80 MHz bandwidth provided by an embodiment of the present application;

[0144] Fig. 20 A schematic diagram of a mismatch between an 80MHz tone plan and a 20MHz tone plan provided in an embodiment of the present application;

[0145] Fig.21 A flow chart of a communication method provided in an embodiment of the present application;

[0146] Fig. 22 A flow chart of a communication method provided in an embodiment of the present application;

[0147] Fig.23 A flowchart of a communication method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0148] Before describing the embodiments of the present application, the technical terms involved in the embodiments of the present application are described.

[0149] The technical solution provided in the embodiment of the present application can be applied to a wireless local area network (WLAN) that supports the relevant standards of the Institute of Electrical and Electronics Engineers (IEEE), and 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.

[0150] In terms of bandwidth configuration, the 802.11ax standard currently supports the following bandwidth configurations: 20MHz, 40MHz, 80MHz, 160MHz, and 80+80MHz. In the 802.11be standard, 320MHz bandwidth configuration is also supported.

[0151] The difference between 160MHz and 80+80MHz is that the former is a continuous frequency band, while the two 80MHz bands of the latter can be separated.

[0152] In a WLAN communication system, resource allocation can be performed in units of resource units (RUs), and communication devices can communicate with each other through RUs. The following describes RUs in detail using various examples of RU-based subcarrier distribution (tone plan) as an example.

[0153] The first exemplary one is Figure 1 As shown in the figure, when the bandwidth is 20MHz, the entire bandwidth can be composed of a whole 242-tone RU, or various combinations of 26-tone RU, 52-tone RU, and 106-tone RU. Each RU includes data subcarriers and pilot subcarriers. The data subcarrier is used to carry data information, and the pilot subcarrier is used to estimate the phase offset and frequency offset. In addition to the RU, some guard subcarriers, empty subcarriers, or direct current (DC) subcarriers may also be included.

[0154] In the second example, Figure 2 As shown, when the bandwidth is 40MHz, the entire bandwidth is roughly equivalent to a replication of the 20MHz subcarrier distribution. The entire bandwidth can be composed of a whole 484-tone RU or various combinations of 26-tone RU, 52-toneRU, 106-tone RU, and 242-tone RU.

[0155] In the third example, Figure 3 As shown in the figure, when the bandwidth is 80MHz, the entire bandwidth can be composed of 4 resource units of 242-tone RU. Alternatively, the entire bandwidth can also be composed of the entire 996-tone RU, or various combinations of 26-toneRU, 52-tone RU, 106-tone RU, 242-tone RU, and 484-tone RU. Among them, 484L and 484R represent the left and right halves of the 484-tone RU, respectively, and each contains 242 subcarriers, which is another schematic diagram of 484+5DC.

[0156] In the fourth example, when the bandwidth is 160MHz, the entire bandwidth can be regarded as a replication of 2 80Mhz 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.

[0157] 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.

[0158] Based on the description of subcarrier distribution in various examples above, 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 , ..., 16th. It can be understood that, in the data field, at most 16 242-tone RUs correspond to 16 20 MHz channels in order of frequency from low to high.

[0159] In addition to the RUs mentioned above, the 802.11be standard also introduces: a 52+26-tone RU consisting of a 52-tone RU and a 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 one 484-tone RU. At the bandwidth level, 26-tone RU corresponds to approximately 2MHz, 52-tone RU corresponds to approximately 4MHz, 106-tone RU corresponds to approximately 8MHz, and 242-tone RU corresponds to approximately 20MHz. The sizes of other RUs can be added or multiplied accordingly, which will not be repeated here.

[0160] In addition, with the continuous development of communication technology, strict restrictions are imposed on maximum power and maximum power spectrum density, that is, the transmission power of the communication device cannot exceed the maximum power value, and the transmitted power spectrum density cannot exceed the maximum power spectrum density.

[0161] For example, taking the description of the indoor low power (LPI) communication method in the regulations of the 6GHz spectrum 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 transmission 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 by the regulations is reached when the bandwidth is the maximum 320MHz. Below this bandwidth, it can only send lower power due to the limitation of the maximum power spectral density.

[0162] Table 1

[0163]

[0164] In another example, taking the description of the communication method of LPI in the regulations of the 6GHz spectrum as an example, as shown in Table 2 below, for access points (AP) and / or STAs, taking the transmission power as the 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 transmission power of AP / STA is mainly limited by the maximum power spectral density. When the bandwidth is greater than 20MHz, the transmission power of AP / STA is mainly limited by the maximum power.

[0165] Table 2

[0166]

[0167]

[0168] Based on the above description of the maximum power and the maximum power spectral density, the design of the above RU has room for further power amplification while meeting the restrictions of the maximum power and the maximum power spectral density.

[0169] 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 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.

[0170] The embodiment of the present application provides a first resource unit designed based on a 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 is convenient for smoothing 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.

[0171] The implementation of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0172] The communication method provided in the embodiment of the present application is applicable to a wireless local area network (WLAN) that supports relevant standards of the Institute of Electrical and Electronics Engineers (IEEE), and 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.

[0173] Below Figure 4 Taking as an example, the WLAN communication system provided in an embodiment of the present application is described.

[0174] Figure 4 A schematic diagram of a communication system provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the communication system may include an access point device and a site device; wherein one or more access point devices may communicate with one or more site devices, the access point device may also communicate with one or more other access point devices, and the site device may also communicate with one or more other site devices.

[0175] The access point device may be an AP, and the station device may be a STA.

[0176] Exemplarily, the AP may be a device that supports the 802.11be standard or multiple WLAN standards such as future Wi-Fi standards; it may 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.

[0177] For example, AP can be a terminal device with a Wi-Fi chip, a network device, a communication server, a router, a switch, a bridge, a computer, etc. AP can also be an access point for mobile users to enter the wired network. It is mainly deployed in homes, buildings and parks, with a typical coverage radius of tens to hundreds of meters. Of course, it can also be deployed outdoors. AP is equivalent to a bridge connecting wired and wireless networks. Its main function is to connect various wireless network clients together and then connect the wireless network to Ethernet.

[0178] Exemplarily, STA may be a device supporting the 802.11be standard or supporting multiple WLAN standards such as future Wi-Fi standards; it may also be a device supporting 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.

[0179] For example, STA can be a wireless communication chip, a wireless sensor, a wireless communication terminal, a communication server, a router, a switch, a bridge, a computer, etc. For example, STA can be a mobile phone supporting Wi-Fi communication function, a tablet supporting Wi-Fi communication function, a set-top box supporting Wi-Fi communication function, a smart TV supporting Wi-Fi communication function, a smart wearable device supporting Wi-Fi communication function, a vehicle-mounted communication device supporting Wi-Fi communication function, and a computer supporting Wi-Fi communication function, etc., without limitation.

[0180] When implementing it specifically, Figure 4 As shown, for example, each access point device and site device can also use Figure 5 The structure shown, or including Figure 5 Parts shown. Figure 5 The present invention provides a schematic diagram of the composition of a communication device 500 provided in an embodiment of the present invention. The communication device 500 may be an access point device or a chip or system on chip in an access point device; or may be a station device or a chip or system on chip in a station device. Figure 5 As shown, the communication device 500 includes a processor 501 , a transceiver 502 and a communication line 503 .

[0181] 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.

[0182] 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.

[0183] 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 achieving communication.

[0184] The communication line 503 is used to transmit information between the components included in the communication device 500.

[0185] The memory 504 is used to store instructions, where the instructions may be computer programs.

[0186] The memory 504 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices 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 compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0187] 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 or program codes or some data, etc. The memory 504 can be located in the communication device 500, or can be located outside the communication device 500, without limitation. The processor 501 is used to execute the instructions stored in the memory 504 to implement the communication method provided in the following embodiments of the present application.

[0188] In one example, the processor 501 may include one or more CPUs, such as Figure 5 CPU0 and CPU1 in.

[0189] As an optional implementation, the communication device 500 includes multiple processors, for example, Figure 5 In addition to the processor 501, a processor 507 may also be included.

[0190] As an optional implementation, the communication device 500 further includes an output device 505 and an input device 506. Exemplarily, the input device 506 is a device such as a keyboard, a mouse, a microphone or a joystick, and the output device 505 is a device such as a display screen and a speaker.

[0191] It should be noted that the communication device 500 can 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 Figure 5 In addition, Figure 5 The structure shown in the figure does not constitute a limitation on the communication device, except Figure 5 In addition to the components shown, the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0192] In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0193] In addition, the actions, terms, etc. involved in the various embodiments of the present application can refer to each other without limitation. The message name or parameter name in the message exchanged between the various devices in the embodiments of the present application is only an example, and other names can also be used in the specific implementation without limitation.

[0194] Combine the following Figure 4 The communication system shown, referring to the following Figure 6 , the communication method provided in the embodiment of the present application is described, wherein the first communication device can be Figure 4 Any access point device or station device in the communication system shown. The first communication device described in the following embodiments may have Figure 5 or Figure 5 Parts shown.

[0195] Figure 6 A flow chart of a communication method provided in an embodiment of the present application, such as Figure 6 As shown, the method may include:

[0196] Step 601: A first communication device transmits an OFDM symbol through a first resource unit.

[0197] The first resource unit 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. The first resource unit may also be called a 52-tone DRU.

[0198] It can be understood that the "continuous" in the embodiments of the present application includes continuity in a physical sense, that is, there is no other subcarrier 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, there is no other subcarrier 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, there is no other subcarrier between the continuous first subcarrier and the second subcarrier.

[0199] The "continuous" in the embodiment of the present application may also include continuity after removing the DC subcarrier, that is, one or more DC subcarriers may exist between two continuous 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.

[0200] 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], where [-128:-123, 123:127] is a protection subcarrier, [-1:1] is a 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, it can be considered that the second subcarrier and the third subcarrier are 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, it can be considered that the first subcarrier and the second subcarrier are continuous.

[0201] Similarly, the "discrete" in the embodiments of the present application refers to the discreteness after the DC subcarrier is removed, or can be described as the presence of at least one subcarrier other than the DC subcarrier between two discrete subcarriers.

[0202] Exemplarily, there is at least one subcarrier whose index is in the range of [-122:-2, 2:122] between two discrete subcarriers.

[0203] Optionally, for each group of subcarriers, the number of subcarriers spaced between two discrete subcarriers is greater than or equal to 3.

[0204] 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.

[0205] In another example, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers spaced between the first subcarrier and the second subcarrier may be greater than 3 (such as 4, 5, etc.). Alternatively, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers spaced between the second subcarrier and the third subcarrier may be greater than 3 (such as 4, 5, etc.).

[0206] Optionally, 20 MHz may include 4 first resource units.

[0207] 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.

[0208] Among them, n=1,2,…,17.

[0209] 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.

[0210] 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, and the nth group of subcarriers of the first resource unit 4 includes the first subcarrier 4-n-1, the second subcarrier 4-n -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 frequency domain order as follows: 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).

[0211] Among them, the first subcarrier 4-n-1 in the nth group of subcarriers of the 4th first resource unit and the second subcarrier 1-n-2 in the nth group of subcarriers of the 1st first resource unit can be continuous or discrete, without restriction.

[0212] 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.

[0213] Among them, n=1,2,…,17.

[0214] 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.

[0215] 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, and the nth group of subcarriers of the first resource unit 4 includes the first subcarrier 4-n-1, the second subcarrier 4-n -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 frequency domain order: 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).

[0216] 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.

[0217] 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.

[0218] Based on the above description of the first resource unit, refer to the following Figure 7 , providing the following four possible examples:

[0219] In the 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.

[0220] 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.

[0221] In the third example, the indexes of the subcarriers included in the first resource unit can 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.

[0222] In the fourth example, the indexes 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.

[0223] Optionally, 20MHz may include the above Figure 7 The four first resource units are shown in the four examples.

[0224] Optionally, the subcarrier corresponding to the first resource unit may be determined based on the following method:

[0225] 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 performed alternately (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.

[0226] For example, Figure 8 As shown, each of the 1st to 6th, 9th, 11th to 16th groups of subcarriers among the 18 groups of subcarriers may include 14 subcarriers, each of the 7th, 8th, 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] 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.

[0231] Optionally, the transmission of OFDM symbols by the first communication device 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.

[0232] Optionally, taking the OFDM symbol being an OFDM symbol of a physical layer protocol data unit (PPDU) as an example, the first communication device may transmit the OFDM symbol corresponding to the long training sequence (LTF) field or the data field in the PPDU through the first resource unit.

[0233] 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.

[0234] Based on the above Figure 6 The method shown provides a first resource unit designed based on distributed RU technology, which can discretize the limited number of subcarriers to 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 is convenient for smoothing 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.

[0235] The maximum power spectrum density is limited in the form of the transmission power of 1MHz not exceeding x mw. Taking the subcarrier spacing of 78.125kHz as an example, 1MHz can contain 12.8 (about 13) subcarriers. Since the average power of each subcarrier is the same during one transmission process. Observing any 13 consecutive subcarriers, the maximum number of subcarriers carrying signals will determine the average power of each subcarrier, and then determine the transmission power of the signal. For example, in a 20MHz bandwidth (a total of 242 subcarriers), if all 13 consecutive subcarriers include at most 5 subcarriers carrying signals, then the average power of each subcarrier will be x(mw) / 5. If there are 26 subcarriers carrying signals, the total transmission power will be x(mw) / 5*26. If there are 52 subcarriers carrying signals, the total transmission power will be x(mw) / 5*52.

[0236] 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.

[0237] 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 gain can reach 4.3. If you want to get a higher power gain, for a 52-tone DRU, at most 2 of the 13 subcarriers arranged in frequency domain order carry signals, which requires 52 / 2*13=338 subcarriers, which exceeds the 256 subcarriers of the 20M bandwidth, so the maximum power gain 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 gain.

[0238] Based on the above Figures 5 to 8 The first resource unit shown, optionally, can also determine the second resource unit based on the above-mentioned first resource unit.

[0239] 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 may include the odd 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 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.

[0240] For example, the first resource unit is used as the above Figure 8As an example, the first resource unit shown in FIG. 1 can be determined according to the odd-numbered subcarriers in the first resource unit 1. Fig. 9 The second resource unit 1 shown in FIG. 1 is determined according to the even-numbered subcarriers in the first resource unit 1. Fig. 9 The second resource unit 2 shown; according to the odd subcarrier in the first resource unit 2, determine as follows Fig. 9 The second resource unit 3 shown in FIG. 1 is determined according to the even-numbered subcarriers in the first resource unit 2. Fig. 9 The second resource unit 4 shown; according to the odd subcarrier in the first resource unit 3, determine as follows Fig. 9 The second resource unit 5 shown in FIG. 1 is determined according to the even-numbered subcarriers in the first resource unit 3. Fig. 9 The second resource unit 6 shown; according to the odd subcarrier in the first resource unit 4, determine as follows Fig. 9 The second resource unit 7 shown in FIG. 1 determines the even-numbered subcarriers in the first resource unit 4 as follows: Fig. 9 The second resource unit 8 is shown.

[0241] 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.

[0242] 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.

[0243] The indexes of 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.

[0244] The indexes of 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.

[0245] 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.

[0246] The indexes of 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.

[0247] The indexes of 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.

[0248] 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.

[0249] Optionally, 20MHz may include the above Fig. 9 The second resource unit 1 to the second resource unit 8 are shown.

[0250] 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 a 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.

[0251] For example, Fig. 9 As shown, the indexes of the subcarriers included in the 9th 26-tone DRU can 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.

[0252] Based on the above Figures 5 to 8The first resource unit shown, optionally, can also determine the third resource unit based on the above-mentioned first resource unit.

[0253] 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.

[0254] Exemplarily, the third resource unit may include the first first resource unit (such as the first resource unit 1 mentioned above), the third first resource unit (such as the first resource unit 3 mentioned above), a single subcarrier indexed as 3, and a single subcarrier indexed as 5. Alternatively, the third resource unit may include the second first resource unit (such as the first resource unit 2 mentioned above), the fourth first resource unit (such as the first resource unit 4 mentioned above), a single subcarrier indexed as 4, and a single subcarrier indexed as 6.

[0255] Among them, the first resource unit is the above Figure 8 Taking the first resource unit shown as an example, Fig.10 As shown, 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, -2 5, -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.

[0256] The indexes 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.

[0257] Optionally, 20MHz may include the above Fig.10 The third resource unit 1 and the third resource unit 2 are shown.

[0258] Based on the above description of the first resource unit, optionally, the first resource unit includes 4 discrete pilot subcarriers.

[0259] 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 continuous subcarriers can be obtained at the pilot subcarrier, and in 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.

[0260] 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 4 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.

[0261] 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.

[0262] 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.

[0263] Wherein, m = 1, 2, ..., 7, 8, 10, 11, ..., 17. The mth group of subcarriers is the 1st to 8th blocks and the 10th to 17th blocks mentioned above.

[0264] For example, taking the mth group of subcarriers of the first resource unit 1 including continuous second subcarriers 1-m-2 and third subcarriers 1-m-3, the mth group of subcarriers of the first resource unit 2 including continuous second subcarriers 2-m-2 and third subcarriers 2-m-3, the mth group of subcarriers of the first resource unit 3 including continuous second subcarriers 3-m-2 and third subcarriers 3-m-3, and the mth group of subcarriers of the first resource unit 4 including continuous second subcarriers 4-m-2 and third subcarriers 4-m-3 as an example, these four groups of continuous subcarriers can be arranged in 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). One of the eight continuous subcarriers is a pilot subcarrier.

[0265] 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 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.

[0266] Wherein, m = 1, 2, ..., 7, 8, 10, 11, ..., 17. The mth group of subcarriers is the 1st to 8th blocks and the 10th to 17th blocks mentioned above.

[0267] 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 continuous 8 subcarriers, there is one subcarrier that is a pilot subcarrier.

[0268] Optionally, the 4 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 4 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 4 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 4 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 distribution of pilot subcarriers more uniform, avoid the pilot subcarriers of the first resource unit being too close, and thus avoid narrowband interference from contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0269] Optional, such as Fig.17 As shown, the 4 pilot subcarriers included in the 4th first resource unit (i.e., the first resource unit 4) are respectively located in the 1st, 5th, 10th, and 14th groups of subcarriers arranged in the frequency domain order. The distance between the pilot subcarriers and the protection subcarriers can be reduced, and the pilot subcarriers can be distributed more evenly, so as to avoid the pilot subcarriers of the first resource unit being too close, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0270] Optional, such as Fig.17 As shown, the 4 pilot subcarriers included in the first resource unit (i.e., the first resource unit 1) are respectively located in the 4th, 8th, 13th, and 17th groups of subcarriers arranged in frequency domain order. The distance between the pilot subcarriers and the protection subcarriers can be reduced, and the pilot subcarriers can be distributed more evenly, so as to avoid the pilot subcarriers of the first resource unit being too close, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0271] Optional, such as Fig.17 As shown, the 4 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 4 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.

[0272] Alternatively, the 4 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 4 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.

[0273] 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.

[0274] In the first example, the indexes of 256 subcarriers under 20M bandwidth are: [-128:127], and the pilot subcarriers of the 4th first resource unit are respectively located in the 1st, 5th, 10th, and 14th groups of subcarriers. The indexes of consecutive subcarriers in the 1st, 5th, 10th, and 14th groups of subcarriers are: -112, -111, -56, -55, 19, 20, 74, and 75. The sorting numbers of these 8 subcarriers in the subcarriers of the 4th first resource unit are: 2, 3, 14, 15, 29, 30, 41, and 42 respectively. The sorting numbers of the 2 pilot subcarriers of the 4th first resource unit in the subcarriers of the 4th first resource unit can be odd numbers, and the sorting numbers of the other 2 pilot subcarriers in the subcarriers of the 4th first resource unit can be even numbers, so that the two second resource units (as mentioned above) can be determined according to the 4th first resource unit. Fig. 9 When the second resource unit 7 and the second resource unit 8 are used as shown in the figure, it is ensured that each second resource unit can include 2 pilot subcarriers.

[0275] 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.

[0276] 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}.

[0277] In the first example above, when the pilot subcarrier of the first resource unit is {-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 further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0278] In the second example, the indexes of 256 subcarriers under 20M bandwidth are: [-128:127], and the pilot subcarriers of the third first resource unit are respectively located in the 2nd, 6th, 11th, and 15th groups of subcarriers. 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 sorting numbers of these 8 subcarriers in the subcarriers of the third first resource unit are: 5, 6, 17, 18, 32, 33, 44, and 45 respectively. The sorting numbers of the two pilot subcarriers of the third first resource unit in the subcarriers of the third first resource unit can be odd numbers, and the sorting numbers of the other two pilot subcarriers in the subcarriers of the third first resource unit can be even numbers, so that the two second resource units (as mentioned above) can be determined according to the third first resource unit. Fig. 9 When the second resource unit 5 and the second resource unit 6 are used as shown in the figure, it is ensured that each second resource unit can include 2 pilot subcarriers.

[0279] 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.

[0280] 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}.

[0281] 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.

[0282] In the third example, the indexes of 256 subcarriers under 20M bandwidth are: [-128:127], and the pilot subcarriers of the second first resource unit are respectively located in the 3rd, 7th, 12th, and 16th groups of subcarriers. 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 sorting numbers of these 8 subcarriers in the subcarriers of the second first resource unit are: 8, 9, 20, 21, 35, 36, 47, and 48 respectively. The sorting numbers of the two pilot subcarriers of the second first resource unit in the subcarriers of the second first resource unit can be odd numbers, and the sorting numbers of the other two pilot subcarriers in the subcarriers of the second first resource unit can be even numbers, so that the two second resource units (as mentioned above) can be determined according to the second first resource unit. Fig. 9 When the second resource unit 3 and the second resource unit 4 are shown in the figure, it is ensured that each second resource unit can include 2 pilot subcarriers.

[0283] 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.

[0284] 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}.

[0285] 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.

[0286] 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 respectively located in the 4th, 8th, 13th, and 17th groups of subcarriers. 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 sorting numbers of these 8 subcarriers in the subcarriers of the first first resource unit are: 11, 12, 23, 24, 38, 39, 50, and 51 respectively. The sorting numbers of the two pilot subcarriers of the first first resource unit in the subcarriers of the first first resource unit can be odd numbers, and the sorting numbers of the other two pilot subcarriers in the subcarriers of the first first resource unit can be even numbers, so that the two second resource units (as mentioned above) can be determined according to the first first resource unit. Fig. 9When the second resource unit 1 and the second resource unit 2 are shown in the figure, it is ensured that each second resource unit can include 2 pilot subcarriers.

[0287] Based on this, the indexes of the pilot subcarriers included in the 1st first resource unit are: -75, -20, 55, 111; or, the indexes of the pilot subcarriers included in the 1st first resource unit are: -75, -21, 54, 111; or, the indexes of the pilot subcarriers included in the 1st first resource unit are: -75, -21, 55, 110; or, the indexes of the pilot subcarriers included in the 1st first resource unit are: -76, -20, 54, 111; or, the indexes of the pilot subcarriers included in the 1st first resource unit are: -76, -20, 55, 110; or, the indexes of the pilot subcarriers included in the 1st first resource unit are: -76, -21, 54, 110.

[0288] 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 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}.

[0289] 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.

[0290] Optionally, in addition to the above-mentioned 8 second resource units (second resource unit 1 to second resource unit 8), 20MHz may also include the aforementioned 9th 26-tone DRU, and the 9th 26-tone DRU may also include 2 discrete pilot subcarriers.

[0291] Among them, each pilot subcarrier in the 9th 26-tone DRU is one of two consecutive subcarriers, and each pilot subcarrier is discrete. 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 accuracy of phase deviation estimation and reducing the packet error rate.

[0292] Optionally, a subcarrier away from the DC subcarrier and the protection subcarrier in the 9th 26-tone DRU may be determined as a pilot subcarrier.

[0293] Optionally, two subcarriers that are far enough apart in the 9th 26-tone DRU can be used as pilot subcarriers, so that the pilot subcarriers can be distributed more evenly, thereby avoiding the pilot subcarriers of the 9th 26-tone DRU being too close, and further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0294] For example, the 6th subcarrier and the 20th subcarrier in the 9th 26-tone DRU may be used as pilot subcarriers, and their indexes are -81 and 48. Alternatively, the 7th and 21st subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, and their indexes are -68 and 49.

[0295] 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.

[0296] Exemplarily, the 8th and 23rd subcarriers of the 9th 26-tone RU can be used as pilot subcarriers, and their indexes are -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 20MHz bandwidth) is the maximum, and the minimum distance is 8 or 9.

[0297] Optionally, the pilot subcarrier of the third resource unit may also be determined according to the pilot subcarrier of the first resource unit.

[0298] 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.

[0299] 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.

[0300] Optionally, the pilot subcarriers included in the third resource unit are the four pilot subcarriers included in one of the two first resource units, so that the pilot subcarriers are distributed more evenly, and the pilot subcarriers of the third resource unit are prevented from being too close, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0301] 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.

[0302] 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.

[0303] Optionally, the pilot subcarrier of the first third resource unit is the 4 pilot subcarriers included in the first first resource unit, and at the same time, the pilot subcarrier of the second third resource unit is the 4 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.

[0304] With the above Figure 6 Differently, the present application embodiment also provides another communication method, such as Fig.11 As shown, the method may include:

[0305] Step 1101: A first communication device transmits an OFDM symbol through a second resource unit.

[0306] 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.

[0307] Optionally, the second resource unit includes the odd-numbered subcarrier among “the 52 subcarriers after the above-mentioned 17 groups of subcarriers and 1 single subcarrier are arranged in frequency domain order”, or the second resource unit includes the even-numbered subcarrier among “the 52 subcarriers after the above-mentioned 17 groups of subcarriers and 1 single subcarrier are arranged in frequency domain order”.

[0308] Alternatively, it can also be described as: the second resource unit includes the odd-numbered subcarrier 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 subcarrier in "the above-mentioned 17 groups of subcarriers arranged in frequency domain order and the above-mentioned 1 single subcarrier".

[0309] 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.

[0310] Optionally, for each group of subcarriers, the number of subcarriers spaced between two discrete subcarriers is greater than or equal to 3.

[0311] 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.

[0312] In another example, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers spaced between the first subcarrier and the second subcarrier may be greater than 3 (such as 4, 5, etc.). Alternatively, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers spaced between the second subcarrier and the third subcarrier may be greater than 3 (such as 4, 5, etc.).

[0313] Optionally, 20 MHz may include 8 second resource units.

[0314] 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 the 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.

[0315] Among them, n=1,2,…,17.

[0316] 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.

[0317] 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.

[0318] Among them, n=1,2,…,17.

[0319] 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.

[0320] 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.

[0321] Based on the above description of the second resource unit, refer to the above Fig. 9 , eight possible examples of the second resource unit 1 to the second resource unit 8 are provided, which will not be repeated here.

[0322] Optionally, 20MHz includes Fig. 9 The second resource unit 1 to the second resource unit 8 are shown.

[0323] Optionally, the subcarriers corresponding to 4 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, 1 single subcarrier and / or 2 consecutive subcarriers can be sequentially allocated to 4 groups of second resource units, and the allocation of 1 single subcarrier and 2 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.

[0324] 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.

[0325] 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 a 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.

[0326] For example, Fig. 9 As shown, the indexes of the subcarriers included in the 9th 26-tone DRU can 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.

[0327] Optionally, the transmission of OFDM symbols by the first communication device 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.

[0328] 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.

[0329] It is understandable that some fields of the PPDU (such as the preamble field) may not be transmitted on the second resource unit, but transmitted in units of 20 MHz channels.

[0330] 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 9th 26-tone DRU without limitation.

[0331] Based on the above Fig.11 The second resource unit shown, optionally, can also determine the first resource unit based on the above second resource unit.

[0332] 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 is described that the first resource unit includes the above 17 groups of subcarriers and 1 single subcarrier.

[0333] For example, refer to the above Figure 7 and Fig. 9, the first resource unit 1 may include the first second resource unit (such as the above-mentioned second resource unit 1) and the second second resource unit (such as the above-mentioned second resource unit 2). The first resource unit 2 may include the third second resource unit (such as the above-mentioned second resource unit 3) and the fourth second resource unit (such as the above-mentioned second resource unit 4). The first resource unit 3 may include the fifth second resource unit (such as the above-mentioned second resource unit 5) and the sixth second resource unit (such as the above-mentioned second resource unit 6). The first resource unit 4 may include the seventh second resource unit (such as the above-mentioned second resource unit 7) and the eighth second resource unit (such as the above-mentioned second resource unit 8).

[0334] Based on the above Fig.11 The second resource unit shown, optionally, can also determine the third resource unit based on the above second resource unit.

[0335] 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. Fig.10 The relevant description of the third resource unit is not repeated here.

[0336] Based on the above second resource unit, optionally, the second resource unit may include 2 discrete pilot subcarriers.

[0337] Wherein, 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.

[0338] 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 discrete pilot subcarriers.

[0339] 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.

[0340] In the first example, for a group of second resource units (such as including second resource unit 7 and second resource unit 8), the indexes of pilot subcarriers included in one second resource unit are: -112, -56; the indexes of pilot subcarriers included in another second resource unit are: 19, 74.

[0341] 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.

[0342] 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.

[0343] 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.

[0344] 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.

[0345] 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.

[0346] In the second example, for a group of second resource units (such as including second resource unit 5 and second resource unit 6), the indexes of pilot subcarriers included in one second resource unit are: -99, -43; the indexes of pilot subcarriers included in another second resource unit are: 31, 87.

[0347] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -99, 30; and the indexes of the pilot subcarriers included in another second resource unit are: -44, 87.

[0348] 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.

[0349] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -43, 30; and the indexes of the pilot subcarriers included in another second resource unit are: -100, 87.

[0350] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -43, 86; and the indexes of the pilot subcarriers included in another second resource unit are: -100, 31.

[0351] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: 30, 86; and the indexes of the pilot subcarriers included in another second resource unit are: -100, -44.

[0352] In the third example, for a group of second resource units (such as including second resource unit 3 and second resource unit 4), the indexes of pilot subcarriers included in one second resource unit are: -88, -32; the indexes of pilot subcarriers included in another second resource unit are: 42, 98.

[0353] 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.

[0354] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -88, 99; and the indexes of the pilot subcarriers included in another second resource unit are: -31, 42.

[0355] 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.

[0356] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -32, 99; and the indexes of the pilot subcarriers included in another second resource unit are: -87, 42.

[0357] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: 43, 99; and the indexes of the pilot subcarriers included in another second resource unit are: -87, -31.

[0358] 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 pilot subcarriers included in one second resource unit are: -75, -20; the indexes of pilot subcarriers included in another second resource unit are: 55, 111.

[0359] 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.

[0360] 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.

[0361] 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.

[0362] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: -20, 110; and the indexes of the pilot subcarriers included in another second resource unit are: -76, 55.

[0363] Alternatively, the indexes of the pilot subcarriers included in one second resource unit are: 54, 110; and the indexes of the pilot subcarriers included in another second resource unit are: -76, -21.

[0364] Optionally, the pilot subcarrier of the first resource unit may also be determined according to the pilot subcarrier of the second resource unit.

[0365] A group of pilot subcarriers of the second resource unit may be determined as a pilot subcarrier of a first resource unit.

[0366] 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.

[0367] Optionally, the pilot subcarrier of the third resource unit may also be determined according to the pilot subcarrier of the second resource unit.

[0368] The pilot subcarrier of the first resource unit can be determined according to the pilot subcarrier of the second resource unit, and the pilot subcarrier of the third resource unit can be determined according to the pilot subcarrier of the first resource unit. The description of the pilot subcarrier of the third resource unit can refer to the aforementioned description of the pilot subcarrier of the third resource unit, which is not repeated here.

[0369] Optionally, in addition to the eight 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 discrete pilot subcarriers.

[0370] Among them, each pilot subcarrier in the 9th 26-tone DRU is one of two consecutive subcarriers, and each pilot subcarrier is discrete. 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 accuracy of phase deviation estimation and reducing the packet error rate.

[0371] Optionally, a subcarrier away from the DC subcarrier and the protection subcarrier in the 9th 26-tone DRU may be determined as a pilot subcarrier.

[0372] Optionally, two subcarriers that are far enough apart in the 9th 26-tone DRU can be used as pilot subcarriers, so that the pilot subcarriers can be distributed more evenly, thereby avoiding the pilot subcarriers of the 9th 26-tone DRU being too close, and further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0373] For example, the 6th subcarrier and the 20th subcarrier in the 9th 26-tone DRU may be used as pilot subcarriers, and their indexes are -81 and 48. Alternatively, the 7th and 21st subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, and their indexes are -68 and 49.

[0374] 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.

[0375] Exemplarily, the 8th and 23rd subcarriers of the 9th 26-tone RU can be used as pilot subcarriers, and their indexes are -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 20MHz bandwidth) is the maximum, and the minimum distance is 8 or 9.

[0376] With the above Figure 6 or Fig.11 Differently, the present application embodiment also provides another communication method, such as Fig.12 As shown, the method may include:

[0377] Step 1201: A first communication device transmits an OFDM symbol via a third resource unit.

[0378] Among them, the third resource unit may include 17 groups of subcarriers and 4 single subcarriers, each group of subcarriers includes the fourth subcarrier, the fifth subcarrier, the sixth subcarrier, the seventh subcarrier, the eighth subcarrier, and the 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. The third resource unit can also be called a 106-tone DRU.

[0379] 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.

[0380] Exemplarily, the number of subcarriers spaced between the fourth subcarrier and the fifth subcarrier may be equal to 1, or greater than 1 (such as 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 (such as 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 (such as 3, 4, 5, etc.).

[0381] Optionally, 20 MHz may include 2 third resource units.

[0382] 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.

[0383] Among them, n=1,2,…,17.

[0384] 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.

[0385] 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.

[0386] Based on the above description of the third resource unit, refer to the above Fig.10 , two possible examples of the above-mentioned 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, and 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.

[0387] 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 to 2 third resource units in sequence (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.

[0388] For example, Figure 8 As shown, each of the 1st to 6th, 9th, 11th to 16th groups of subcarriers among the 18 groups of subcarriers may include 14 subcarriers, each of the 7th, 8th, 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.

[0389] Among them, the third resource unit 1 may 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.

[0390] 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.

[0391] Optionally, the transmission of OFDM symbols by the first communication device 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.

[0392] 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.

[0393] 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.

[0394] Based on the above Fig.12 The third resource unit shown, optionally, the first resource unit can also be determined based on the third resource unit.

[0395] Among them, the subcarriers included in the third resource unit may include subcarriers included in 2 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.

[0396] Exemplarily, the first resource unit 1 may include 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 the frequency domain order in the third resource unit 1, and the fourth subcarrier and the sixth subcarrier are discrete. The first resource unit 3 may include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers includes the fifth subcarrier, the eighth subcarrier and the ninth subcarrier arranged in the frequency domain order in the third resource unit 1; the fifth subcarrier and the eighth subcarrier are discrete. The first resource unit 2 may include 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 the frequency domain order in the third resource unit 2, and the fourth subcarrier and the sixth subcarrier are discrete. The first resource unit 4 may include 17 groups of subcarriers and 1 single subcarrier, each group of subcarriers includes the fifth subcarrier, the eighth subcarrier and the ninth subcarrier arranged in the frequency domain order in the third resource unit 2; the fifth subcarrier and the eighth subcarrier are discrete. For details, please refer to the above Figure 7 The first resource unit shown is not described in detail here.

[0397] Based on the above Fig.12 The second resource unit shown can, optionally, also be determined based on the third resource unit mentioned above.

[0398] The first resource unit can be determined according to the third resource unit, and the second resource unit can be determined according to the first resource unit. Fig. 9 The relevant description of the second resource unit is not repeated here.

[0399] Based on the above third resource unit, optionally, the third resource unit may include 4 discrete pilot subcarriers.

[0400] Among them, the 4 discrete pilot subcarriers are 4 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 combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier, and in 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.

[0401] 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 each of the 1st to 8th blocks and the 10th to 17th blocks as a candidate pilot subcarrier, for a total of 16 candidate 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. Four 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.

[0402] 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 deviation estimation.

[0403] 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.

[0404] Exemplarily, 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; or, 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; or, 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; or, 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 pilot subcarriers can be distributed more evenly, avoiding the pilot subcarriers of the third resource unit from being too close, thereby avoiding narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0405] In the first example, taking the index 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 index of the pilot subcarriers included in the third resource unit is: -112, -56, 19, 74; or, the index of the pilot subcarriers included in the third resource unit is: -112, -55, 20, 74; or, the index of the pilot subcarriers included in the third resource unit is: -112, -55, 19, 75; or, the index of the pilot subcarriers included in the third resource unit is: -111, -56, 20, 74; or, the index of the pilot subcarriers included in the third resource unit is: -111, -56, 19, 75; or, the index of the pilot subcarriers included in the third resource unit is: -111, -55, 20, 75.

[0406] In the second example, taking the index 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 index of the pilot subcarriers included in the third resource unit is: -99, -43, 31, 87; or, the index of the pilot subcarriers included in the third resource unit is: -99, -44, 30, 87; or, the index of the pilot subcarriers included in the third resource unit is: -99, -44, 31, 86; or, the index of the pilot subcarriers included in the third resource unit is: -100, -43, 30, 87; or, the index of the pilot subcarriers included in the third resource unit is: -100, -43, 31, 86; or, the index of the pilot subcarriers included in the third resource unit is: -100, -44, 30, 86.

[0407] In the third example, taking the index 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 index of the pilot subcarriers included in the third resource unit is: -88, -32, 42, 98; or, the index of the pilot subcarriers included in the third resource unit is: -88, -31, 43, 98; or, the index of the pilot subcarriers included in the third resource unit is: -88, -31, 42, 99; or, the index of the pilot subcarriers included in the third resource unit is: -87, -32, 43, 98; or, the index of the pilot subcarriers included in the third resource unit is: -87, -32, 42, 99; or, the index of the pilot subcarriers included in the third resource unit is: -87, -31, 43, 99.

[0408] 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.

[0409] Optionally, based on the above description of the third resource unit, the pilot subcarriers of the first resource unit can also be determined according to 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 will not be repeated here.

[0410] Optionally, the pilot subcarrier of the second resource unit may also be determined according to the above 16 pilot subcarriers.

[0411] Among them, the pilot subcarriers of the first resource unit can be determined according to the above 16 pilot subcarriers, and the pilot subcarriers of the second resource unit can be determined according to 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.

[0412] Optionally, in addition to the eight 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 discrete pilot subcarriers.

[0413] Among them, each pilot subcarrier in the 9th 26-tone DRU is one of two consecutive subcarriers, and each pilot subcarrier is discrete. 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 accuracy of phase deviation estimation and reducing the packet error rate.

[0414] Optionally, a subcarrier away from the DC subcarrier and the protection subcarrier in the 9th 26-tone DRU may be determined as a pilot subcarrier.

[0415] Optionally, two subcarriers that are far enough apart in the 9th 26-tone DRU can be used as pilot subcarriers, so that the pilot subcarriers can be distributed more evenly, thereby avoiding the pilot subcarriers of the 9th 26-tone DRU being too close, and further avoiding narrowband interference contaminating too many pilot subcarriers, resulting in inaccurate phase deviation estimation.

[0416] For example, the 6th subcarrier and the 20th subcarrier in the 9th 26-tone DRU may be used as pilot subcarriers, and their indexes are -81 and 48. Alternatively, the 7th and 21st subcarriers in the 9th 26-tone DRU may be used as pilot subcarriers, and their indexes are -68 and 49.

[0417] 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.

[0418] Exemplarily, the 8th and 23rd subcarriers of the 9th 26-tone RU can be used as pilot subcarriers, and their indexes are -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 20MHz bandwidth) is the maximum, and the minimum distance is 8 or 9.

[0419] Above Figures 6 to 12The first resource unit designed based on the distributed RU technology in each of the embodiments shown 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 about 2 / 3 of the subcarriers), improve the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0420] Above Figures 6 to 12 In the various embodiments shown, 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 is convenient for smoothing the estimated channel coefficients in the channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of about 2 / 3 of the subcarriers), thereby improving the accuracy of the channel estimation, thereby improving the packet error rate and improving the system throughput.

[0421] Specifically, the second resource unit and the ninth 26-tone DRU provided in the embodiment of the present application have at most 2 signals carried in any 13 subcarriers arranged in frequency domain order, and the power gain can reach 6.5. If you want to get a higher power gain, for the 26-tone DRU, at most 1 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 gain 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 gain.

[0422] Above Figures 6 to 12The third resource unit designed based on the distributed RU technology in each of the embodiments shown 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 two third resource units can achieve a larger power amplification factor. At the same time, each 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 about 2 / 3 of the subcarriers), improve the accuracy of channel estimation, thereby improving the packet error rate and improving the system throughput.

[0423] It is understandable that the above Figures 6 to 12 In each of the illustrated embodiments, 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.

[0424] Specifically, the third resource unit provided in the embodiment of the present application has a maximum of 6 signals in any 13 consecutive subcarriers arranged in frequency domain order, and its power gain can reach 2.17. If you want to get a higher power gain, 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, so the maximum power gain 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 gain.

[0425] Above Figures 6 to 12 The DRU described in the method can be used for transmission of downlink OFDMA PPDU. For example, the AP can transmit the downlink OFDMA PPDU according to the above Figures 6 to 12 The DRU described in the method sends a downlink OFDMA PPDU; accordingly, the STA Figures 6 to 12 The DRU described in the method receives a downlink OFDMA PPDU.

[0426] Above Figures 6 to 12 The DRU described in the method can also be used for uplink OFDMA PPDU / TB PPDU transmission. For example, the AP sends a trigger frame, and the STA allocates resources according to the trigger frame and the above-mentioned Figures 6 to 12 The DRU described in the method sends a TB PPDU; accordingly, the AP Figures 6 to 12 The method described herein is for a DRU to receive a TB PPDU.

[0427] For example, Fig.14As shown, taking the uplink multi-user transmission scenario as an example, the AP can send the following to the STA: Fig.13 The trigger frame shown in the figure carries the identifier information and resource allocation information of the STA, wherein the User Info List field contains the indication 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, and send discrete RUs interspersed by multiple users to increase the transmission power of each user under the condition of a certain bandwidth.

[0428] Specifically, the trigger frame may include resource scheduling parameters and other parameters for one or more first communication devices to send PPDU. Fig.13 As shown, 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, etc. The specific description of each field in the trigger frame can refer to the corresponding description in the 802.11ax standard or the 802.11be standard, which will not be described here.

[0429] Among them, 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 contains information that each first communication device needs to read respectively. The user information field may include fields such as the association identification (association identification 12, AID12) field and the resource unit allocation (resource unit allocation, RU allocation) subfield. Among them, the association identification field can be used to represent the association identification of a certain receiving end communication device, and the resource unit allocation subfield can 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).

[0430] Exemplarily, taking the 802.11be standard as an example, in the user information field in 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 public information field, uplink bandwidth extension subfield (UL BW Extension subfield) in the special user information field, and master-slave 160 subfield (PS160 subfield).

[0431] Among them, in the common information field, B55 indicates whether there is a special user information field in the user information field. For EHT TB PPDU, its bandwidth is jointly 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 the following Table 3:

[0432] 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, and the values ​​of X1 and X0 can be referred to in the following Table 4, which describes the transformation of logical parameters PS160, 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, which represents from low frequency to high frequency from left to right, wherein P80 represents the main 80MHz channel, S80 represents the slave 80 channel, and S160 represents the slave 160MHz channel.

[0433] Table 3

[0434]

[0435]

[0436]

[0437] Table 4

[0438]

[0439]

[0440] This application also provides the following technical solutions:

[0441] (1) A new design of a 20 MHz tone plan, including a new design of a guard tone 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.

[0442] Except for the specific number and position of guard tones, subcarrier index of DRU, and pilot subcarrier index in DRU, which are different from the number and position of guard tones, subcarrier index of DRU, and pilot subcarrier index in DRU of the 20MHz tone plan in the above embodiments, the 20MHz tone plan has the same characteristics 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, the second subcarrier and the third subcarrier are continuous; or, the first subcarrier and the second subcarrier are continuous, the second subcarrier and the third subcarrier are discrete", such as "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", such as "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".

[0443] Specifically, the 20MHz Tone Plan in 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 the present 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 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.

[0444] For example, Fig.18As shown, 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 ​​20MHz 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 ​​20MHz as protection subcarriers. Correspondingly, after the shift, the subcarrier indexes of the DRU of the new 20MHz toneplan can be shown in Table 5, Table 6, and Table 7 respectively.

[0445] Table 5

[0446]

[0447]

[0448] Table 6

[0449]

[0450] Table 7

[0451]

[0452]

[0453] At the same time, the pilot subcarrier index of the DRU of the new 20MHz tone plan is as follows:

[0454] like Fig.18As shown, the pilot subcarriers of the fourth 52-tone DRU (i.e., the first resource unit 4) are included in the paired subcarriers of the 1st, 5th, 10th, and 14th groups. The paired subcarrier indexes of the 1st, 5th, 10th, and 14th groups are -110, -109, -56, -55, 19, 20, 72, and 73, where the subcarrier index refers to the index [-128:127] of the 256 subcarriers under the 20MHz bandwidth. Its serial 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 2 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 is allocated 2 pilot subcarriers, 2 of the 52-tone DRU pilot subcarrier numbers must be odd and 2 must be even. Considering the requirement of taking one subcarrier from each pair as a pilot subcarrier, there are 6 groups of pilot subcarrier indexes that meet the conditions, including {-110-56 19 72}, {-110-55 20 72}, {-110-5519 73}, {-109-56 20 72}, {-109-56 19 73}, {-109-55 20 73}. Correspondingly, the pilot subcarrier indexes of the two split 26-tone DRUs are {-110-56} / {19 72}, {-110 20} / {-55 72}, {-110 73} / {-5519}, {-109 72} / {-56 20}, {-109 19} / {-56 73}, and {-109-55} / {20 73}. Among them, {-110-5520 72} and {-109-56 19 73} are more friendly to the two split 26-tone DRUs, and can make the pilot distribution of the two split 26-tone DRUs more uniform.

[0455] like Fig.18As shown, the pilot subcarriers of the third 52-tone DRU (i.e., the first resource unit 3) are included in the paired subcarriers of the 2nd, 6th, 11th, and 15th groups. The paired subcarrier indexes of the 2nd, 6th, 11th, and 15th groups are -99, -98, -44, -43, 30, 31, 84, and 85. Their serial 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 indexes of the two split 26-tone DRUs are {-98-43} / {3185}, {-98 30} / {-44 85}, {-98 84} / {-44 31}, {-43 30} / {-99 85}, {-43 84} / {-99 31}, and {30 84} / {-99-44}, respectively. Among them, {-98-44 30 85} and {-99-43 31 84} are more friendly to the two split 26-tone DRUs, and can make the pilot distribution of the two split 26-tone DRUs more uniform.

[0456] like Fig.18As shown, the pilot subcarriers of the second 52-tone DRU (i.e., the first resource unit 2) are included in the paired subcarriers of the 3rd, 7th, 12th, and 16th groups. The paired subcarriers of the 3rd, 7th, 12th, and 16th groups are indexed as -88, -87, -32, -31, 41, 42, 96, and 97. Their serial 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 indexes 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}, {42 97}\{-87-31}. Among them, {-88-31 42 96} and {-87-32 41 97} are more friendly to the two split 26-tone DRUs, and can make the pilot distribution of the two split 26-tone DRUs more uniform.

[0457] like Fig.18As shown, 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 serial 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 53108}, {-76-20 52 109}, {-76-2053 108}, {-76-21 52 108}. Correspondingly, the pilot subcarrier indexes of the two split 26-tone DRUs are {-75-20} / {53 109}, {-75 52} / {-21 109}, {-75108} / {-21 53}, {-20 52} / {-76 109}, {-20 108} / {-7653}, {52 108} / {-76-21}, respectively. Among them, {-75-21 52 109} and {-76-20 53 108} are more friendly to the two split 26-tone DRUs, and can make the pilot distribution of the two split 26-tone DRUs more uniform.

[0458] 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 subcarrier 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.

[0459] (2) Based on the new 20 MHz tone plan described in (1), design a tone plan with a discrete bandwidth of 20 MHz.

[0460] 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.

[0461] For bandwidths greater than 20MHz (such as 40 / 80 / 160 / 320MHz), in uplink transmissions where perforation exists 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, and the use of the split 20MHz discrete bandwidth for DRU scheduling and transmission will affect communication performance.

[0462] For example, taking 80MHz bandwidth as an example, in the uplink transmission with puncturing and 20M-only sites participating, Fig.19 As shown in the figure, the DRU tone plan based on 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. Fig.19 The second 20MHz in the 80MHz bandwidth shown is punctured, and the DRU is scheduled in the 20MHz discrete bandwidth on the left according to the 20MHz bandwidth tone plan and in the 40MHz discrete bandwidth on the right according to the 40MHz bandwidth tone plan, which is also called scheduling and transmission of DRU based on the 20MHz discrete bandwidth and the 40MHz discrete bandwidth. Here, the discrete bandwidth refers to the discrete range of subcarriers included in each DRU.

[0463] However, if Fig. 20As shown in the figure, the subcarrier allocation of the 80MHz bandwidth tone plan does not completely match the subcarrier allocation of the 20MHz bandwidth tone plan. There are 1024 subcarriers in the 80MHz bandwidth, of which the 12 on the left are protection subcarriers, the 11 on the right are also protection subcarriers, and the 5 in the middle are DC subcarriers. The 1024 subcarriers in the 80MHz bandwidth can be divided into 4 parts, each of which is 256 subcarriers, occupying 20MHz bandwidth. When there is puncturing or 20M-only sites participate in transmission, DRU scheduling and signal transmission are required based on the 20MHz bandwidth tone plan on the leftmost 20MHz discrete bandwidth or the rightmost 20MHz discrete bandwidth. At this time, there will be a problem of misalignment of the protection subcarriers. For the leftmost 20MHz discrete bandwidth, there are 6 protection subcarriers on the left. The actual bandwidth of this transmission is 80MHz, and 12 protection subcarriers are required on the leftmost side to ensure compliance with the spectrum template, control adjacent channel interference, and meet the filtering requirements of the transmitter and receiver. Obviously, 6 protection subcarriers are missing on the far left. Similarly, for the 20MHz discrete bandwidth on the far right, there are 5 protection subcarriers on the right. However, the actual bandwidth of this transmission is 80MHz, and 11 protection subcarriers are required on the far right. Obviously, 6 protection subcarriers are missing on the far right. The description here only takes 80MHz bandwidth as an example. In fact, when 40 / 80 / 160 / 320MHz bandwidth calls 20MHz discrete bandwidth for DRU scheduling and transmission, there is a problem of misaligned protection subcarriers.

[0464] In order to solve the above technical problems, the present application provides the following embodiments Fig.21 or Fig. 22 The communication method shown is used to solve the above-mentioned problem of misalignment of the protection subcarriers.

[0465] Fig.21 A flow chart of a communication method provided in an embodiment of the present application, such as Fig.21 As shown, the method may include:

[0466] Step 2101: A first communication device transmits OFDM symbols through a DRU within a 20 MHz discrete bandwidth in a first bandwidth.

[0467] The first bandwidth may be a bandwidth greater than 20 MHz, for example, a bandwidth of 40 / 80 / 160 / 320 MHz.

[0468] Specifically, when scheduling and transmitting DRUs based on the 20MHz discrete bandwidth in the first bandwidth, useful subcarriers based on the 20MHz bandwidth can be shifted on the spectrum (such as the leftward shift in the first possible design described below, or the rightward 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 of the first bandwidth, the adjacent channel interference requirements, and the transceiver filter design, 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.

[0469] 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 Fig.21 In the illustrated embodiment, the 20 MHz bandwidth refers to the new 20 MHz tone plan described in (1) above.

[0470] Among them, useful subcarriers can also be described as occupied subcarriers (occupied tones). For 256 subcarriers with a 20MHz bandwidth or a 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 a useful subcarrier being a subcarrier among the 256 subcarriers except for the protection subcarriers on the first side and the second side.

[0471] Among them, 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 subcarrier with lower frequency is located when the first bandwidth is arranged in order 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 subcarrier with higher frequency is located when the first bandwidth is arranged in order 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 subcarrier with lower frequency 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 subcarrier with higher frequency is located when the 20MHz discrete bandwidth is arranged in order in the frequency domain.

[0472] 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.

[0473] The first side of the 20MHz bandwidth may refer to the leftmost side when the 20MHz bandwidth is arranged in order from low to high in the frequency domain, or may also be described as the side where the subcarrier with a lower frequency is located when the 20MHz bandwidth is arranged in order in the frequency domain. The second side of the 20MHz bandwidth may refer to the rightmost side when the 20MHz bandwidth is arranged in order from low to high in the frequency domain, or may also be described as the side where the subcarrier with a higher frequency is located when the 20MHz bandwidth is arranged in order in the frequency domain.

[0474] 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 right by ax subcarriers on the spectrum to obtain 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.

[0475] It is understandable that, since the 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 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 by ax subcarriers on the spectrum, without limitation.

[0476] 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.

[0477] 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 ith DRU (or described as DRU i) in the 20MHz discrete bandwidth is the subcarrier index of the ith DRU in the 20MHz bandwidth plus ax; ...; the subcarrier index of the ith DRU (or described as DRU I) in the 20MHz discrete bandwidth is the subcarrier index of the ith DRU in the 20MHz bandwidth plus ax. Wherein, i = 1, 2, ..., I; I is a positive integer.

[0478] Exemplarily, 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 the first bandwidth in order from low to high in the frequency domain, or the first 256 subcarriers on the first side of the first bandwidth.

[0479] 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 in the first bandwidth based on the 20MHz discrete bandwidth, the communication performance can be improved.

[0480] In a 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, where a, b, x and y are all positive integers.

[0481] 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 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.

[0482] It is understandable that, since the communication is based on DRU, the above description can also be replaced by: the DRU in the 20MHz bandwidth is shifted 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 the DRU in the 20MHz bandwidth shifted to the left by by subcarriers on the spectrum, or it can be described as: the DRU in the 20MHz discrete bandwidth is the DRU in the 20MHz bandwidth shifted to the left by by subcarriers on the spectrum, without limitation.

[0483] 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.

[0484] 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 DRU I) in the 20MHz discrete bandwidth is the subcarrier index of the I-th DRU in the 20MHz bandwidth minus by. Wherein, i=1,2,…,I; I is a positive integer.

[0485] Exemplarily, the highest frequency 256 subcarriers of the first bandwidth can be used as a 20 MHz discrete bandwidth for DRU scheduling and transmission. The highest frequency 256 subcarriers of the first bandwidth can also be referred to as the rightmost 256 subcarriers arranged in the first bandwidth in order from low to high in the frequency domain, or the last 256 subcarriers on the second side of the first bandwidth.

[0486] 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 in the first bandwidth based on the 20MHz discrete bandwidth, the communication performance can be improved.

[0487] 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 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 20MHzTone Plan-1). Alternatively, based on the above second possible design, the DRU in the 20MHz bandwidth can be shifted 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 Shifted20MHz Tone Plan-2).

[0488] 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, the DRU in the first bandwidth is described in detail. Among them, 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.

[0489] 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.

[0490] 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 with 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 of which are 11. After the shift, when the 256 subcarriers with 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.

[0491] 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.

[0492] 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 with 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 of which are 11. After the shift, when the 256 subcarriers with 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.

[0493] 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.

[0494] 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 with the highest frequency in the 160MHz 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 160MHz bandwidth, both of which are 11. After the shift, when the 256 subcarriers with 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.

[0495] 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.

[0496] 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 with 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 of which are 11. After the shift, when the 256 subcarriers with 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.

[0497] 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 carrier with a new frequency; 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.

[0498] Wherein, the first communication device does not transmit OFDM symbols on the first DRU within the above-mentioned 20MHz 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. Or it can also be described as: within the 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.

[0499] That is, for the first bandwidth, when the 256 subcarriers at the lowest frequency are used as a 20M discrete bandwidth, the DRU will be scheduled and transmitted based on the above Table 4. It is necessary to prohibit the 20MHz-only site 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-toneDRU3, 106-tone DRU1, and 106-tone DRU2.

[0500] Alternatively, for the first bandwidth, when the 256 subcarriers at the highest frequency are used as a 20M discrete bandwidth, DRU scheduling and transmission will be performed based on the above Table 5. 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.

[0501] (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.

[0502] Different from the above method of shifting the useful subcarriers in the 20 MHz bandwidth as a whole to obtain the useful subcarriers of the 20 MHz discrete bandwidth, the following method can also be referred to. Fig. 22 The method shown divides the useful subcarriers in the 20MHz bandwidth into N areas, and shifts the subcarriers in each area respectively 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.

[0503] Fig. 22A schematic diagram of a communication method provided in an embodiment of the present application is shown as follows: Fig. 22 As shown, the method may include:

[0504] Step 2201: A first communication device transmits OFDM symbols through a DRU within a 20 MHz discrete bandwidth in a first bandwidth.

[0505] 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.

[0506] Understandably, Fig. 22 In the illustrated embodiment, the 20 MHz bandwidth refers to the new 20 MHz tone plan described in (1) above.

[0507] Specifically, N regions of a 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 useful subcarriers (i.e., 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 useful subcarriers (i.e., useful subcarriers whose subcarrier index is greater than the DC subcarrier index) can be divided into one or more regions.

[0508] When scheduling and transmitting DRUs based on the 20MHz discrete bandwidth in the first bandwidth, the useful subcarriers in N areas 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.

[0509] 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], and 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.

[0510] 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, based on the position of the DC subcarriers in the 20MHz bandwidth, the non-DC part of the useful subcarriers of the 20MHz bandwidth can be divided into three regions, namely the 1st' region, the 2nd' region, and the 3rd' region described below.

[0511] The first region includes the (x+1)th subcarrier to the Tth subcarrier arranged in frequency domain order in the 20MHz bandwidth; the second region includes the (T+1)th subcarrier to the (128-(K-1) / 2)th subcarrier arranged in frequency domain order in the 20MHz bandwidth; the third region includes the (130+(K-1) / 2)th subcarrier to the (256-y)th subcarrier arranged in frequency domain order in the 20MHz bandwidth. K and T are both positive integers.

[0512] 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 1st value is ax), the subcarriers in the 2nd region can be shifted right by P subcarriers (i.e., the 2nd value is P), and the subcarriers in the 3rd region can be shifted right by Q subcarriers (i.e., the 3rd value is Q) on the spectrum of 20MHz bandwidth, to obtain the subcarriers in the three regions of 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 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; 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 20MHz 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. At the same time, the position of the DC subcarrier is not changed.

[0513] 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.

[0514] It can be understood that since the 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, P subcarriers in the 2nd' area, and 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.

[0515] Or it can be described as: the subcarrier in the 1st area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 1st' area of ​​the DRU in the 20MHz bandwidth shifted (or shifted to the right) by ax subcarriers, the subcarrier in the 2nd area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 2nd' area of ​​the DRU in the 20MHz discrete bandwidth shifted (or shifted to the right) by P subcarriers, and the subcarrier in the 3rd area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 3rd' area of ​​the DRU in the 20MHz bandwidth shifted (or shifted to the right) by Q subcarriers.

[0516] 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.

[0517] Exemplarily, 256 subcarriers of the lowest frequency of the first bandwidth may be used as a 20 MHz discrete bandwidth for DRU scheduling and transmission.

[0518] 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.

[0519] 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, based on the position of the DC subcarriers in the 20MHz bandwidth, the non-DC part of the useful subcarriers of the 20MHz bandwidth can be divided into three regions, namely the 1st' region, the 2nd' region, and the 3rd' region described below.

[0520] The first region includes the (x+1)th subcarrier to the (128-(K-1) / 2)th subcarrier arranged in frequency domain order in the 20MHz 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)th subcarrier to the (256-y)th subcarrier arranged in frequency domain order in the 20MHz bandwidth. K and S are both positive integers.

[0521] Based on the above three regions of 20MHz bandwidth, the subcarriers in the 1st region can be shifted to the left by Q subcarriers (i.e., the 1st value is -Q), the subcarriers in the 2nd region can be shifted to the left by P subcarriers (i.e., the 2nd value is -P), and the subcarriers in the 3rd region can be shifted to the left by by subcarriers (i.e., the 3rd value is -(by)) on the spectrum of 20MHz bandwidth, so as to obtain the subcarriers in the 3 regions of 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). Among them, b, y, P and Q are all positive integers. Therefore, the number of guard subcarriers on the second side of the 20MHz discrete bandwidth is b, which is the same as the number of guard subcarriers on the second side of the first bandwidth, and conforms to the spectrum template of the first bandwidth. At the same time, the position of the DC subcarrier is not changed.

[0522] 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.

[0523] It can be understood that since the 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 1' area, shifted to the left by P subcarriers in the 2' area, and shifted to the left by by subcarriers in the 3' 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 1' 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 2' 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 3' area plus -(by).

[0524] Or it can be described as: the subcarrier in the 1st area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 1st' area of ​​the DRU in the 20MHz discrete bandwidth shifted (or shifted left) by Q subcarriers, the subcarrier in the 2nd area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 2nd' area of ​​the DRU in the 20MHz discrete bandwidth shifted (or shifted left) by P subcarriers, and the subcarrier in the 3rd area of ​​the DRU in the 20MHz discrete bandwidth is the subcarrier in the 3rd' area of ​​the DRU in the 20MHz discrete bandwidth shifted (or shifted left) by by subcarriers.

[0525] 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).

[0526] 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.

[0527] 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 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.

[0528] 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, and 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, so as 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).

[0529] Table 8

[0530]

[0531] Table 9

[0532]

[0533] Table 10

[0534]

[0535]

[0536] 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 (or it can also be described as Shifted 20MHz Tone Plan-2) is obtained.

[0537] Table 11

[0538]

[0539] Table 12

[0540]

[0541]

[0542] Table 13

[0543]

[0544] 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, the DRU in the first bandwidth is described in detail. Among them, 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.

[0545] In the first possible example, taking the first bandwidth as 40 MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20 MHz discrete bandwidth on the 256 subcarriers of 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 the above Table 8, Table 9 or Table 10 minus 128.

[0546] In a second possible example, taking the first bandwidth as 40 MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 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 the above Table 11, Table 12, or Table 13 plus 128.

[0547] In a third possible example, taking the first bandwidth as 80 MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20 MHz discrete bandwidth on the 256 subcarriers of 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.

[0548] In a fourth possible example, taking the first bandwidth as 80 MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20 MHz discrete bandwidth on the 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 the above Table 11, Table 12, or Table 13 plus 384.

[0549] In a fifth possible example, taking the first bandwidth as 160 MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20 MHz discrete bandwidth on the 256 subcarriers of 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.

[0550] 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 of the 160MHz bandwidth. The subcarrier index contained in the DRU in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the above Table 11, Table 12, or Table 13 plus 896.

[0551] In the seventh possible example, taking the first bandwidth as 320MHz bandwidth as an example, the DRU can be scheduled and transmitted based on the 20MHz discrete bandwidth on the 256 subcarriers of the lowest frequency of the 320MHz bandwidth. The subcarrier index contained in the DRU in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the above Table 8, Table 9 or Table 10 minus 1920.

[0552] In the eighth possible example, taking the first bandwidth as 320MHz 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 of the 320MHz bandwidth. The subcarrier index contained in the DRU in the 20MHz discrete bandwidth is the subcarrier index of the DRU in the above Table 11, Table 12 or Table 13 plus 1920.

[0553] The present application also provides a communication method. Fig.23 As shown, the method includes:

[0554] Step 2301: The first communication device transmits OFDM symbols through a DRU within a 20 MHz discrete bandwidth in a first bandwidth;

[0555] The number of guard subcarriers of the 20 MHz discrete bandwidth is the same as the number of guard subcarriers of the first bandwidth.

[0556] 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.

[0557] Among them, based on the above Fig.21 or Fig. 22 The method shown makes the number of protection subcarriers of the 20 MHz discrete bandwidth the same as the number of protection subcarriers of the first bandwidth, which will not be described in detail here.

[0558] It should be noted that the various embodiments of the present application can be implemented independently or in combination without limitation. If there is no special explanation or logical conflict, the terms and / or descriptions of the different embodiments provided in the present application are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0559] It is understandable that in the embodiments of the present application, the execution subject may execute some or all of the steps in the embodiments of the present application, and these steps or operations are only examples. The embodiments of the present application may also execute other operations or variations of various operations. In addition, the various steps may be executed in different orders 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 executed.

[0560] 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 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 the present application.

[0561] The embodiment of the present application can divide the functional modules of each device according to the above method example. 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 module 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 embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0562] In the case of dividing each functional module into corresponding functional modules, Fig.15 A communication device 150 is shown, which can perform the above Figures 6 to 14 The actions performed by the first communication device in the method shown, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and the technical effects that can be obtained can refer to the above method embodiment, which will not be repeated here.

[0563] The communication device 150 may include a transmission module 1501 and a processing module 1502. Exemplarily, the communication device 150 may be a communication device, or a chip used in a communication device, or other combined devices, components, etc. having the functions of the above-mentioned transmitting end device.

[0564] 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.

[0565] 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 a processing circuit), such as a baseband processor.

[0566] When the communication device 150 is a chip system, the transmission module 1501 can be an input and output interface of a chip (eg, a baseband chip); the processing module 1502 can be a processor (or processing circuit) of the chip system, which can include one or more central processing units.

[0567] 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).

[0568] For example, the transmission module 1501 can be used to perform Figures 6 to 14 In the embodiment shown, all transmission operations performed by the first communication device and / or other processes used to support the technology described herein; the processing module 1502 is used to control the transmission module 1501 to perform Figures 6 to 14 The illustrated embodiment shows all transmission operations performed by the first communication device, and / or other processes for supporting the techniques described herein.

[0569] As another possible way to achieve this, Fig.15 The transmission module 1501 in the embodiment can be replaced by a transceiver, and the transceiver can integrate the function of the transmission module 1501; the processing module 1502 can be replaced by a processor, and the processor can integrate the function of the processing module 1502. Further, Fig.15 The illustrated communication device 150 may also include a memory.

[0570] 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 Fig.16 The communication device 160 shown in FIG. 1 may include a processor, a logic circuit 1601, and a transceiver, an interface circuit 1602. Further, Fig.16 The illustrated communication device 160 may also include a memory 1603 .

[0571] The embodiments of the present application also provide a computer program product, which can implement the functions of any of the above method embodiments when executed by a computer.

[0572] The embodiments of the present application also provide a computer program, which can implement the functions of any of the above method embodiments when executed by a computer.

[0573] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above computer-readable storage medium. When the program is executed, it may include the processes of the above method embodiments. The computer-readable storage medium can be an internal storage unit of a terminal (including a data sending end and / or a data receiving end) in any of the above embodiments, such as a hard disk or memory of the terminal. The above computer-readable storage medium can also be an external storage device of the above terminal, such as a plug-in hard disk equipped on the above 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 computer-readable storage medium can also include both an internal storage unit of the above terminal and an external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above terminal. The above computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0574] 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.

[0575] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0576] It should be understood that in the present 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 associated objects before and after 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. It does not limit the time, nor does it require any judgment when it is implemented, nor does it mean that there are other limitations.

[0577] In the embodiments of the present 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 the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0578] In this application, "sending information to ... (terminal device)" can be understood as the destination of the information being the terminal device. It can include sending information to the terminal device directly or indirectly. "Receiving information from ... (terminal device)" can be understood as the source of the information being the terminal device, which can include receiving information from the terminal device directly or indirectly. The information may be processed as necessary between the source and destination of the information, such as format changes, but the destination can understand the valid information from the source.

[0579] 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.

[0580] In the several embodiments provided in the present 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 only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, 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.

[0581] The units described as separate components may or may not be physically separated, 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 different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0582] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0583] 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 can essentially 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, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform 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 USB flash drives, mobile hard drives, ROM, RAM, magnetic disks or optical disks.

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 20MHz 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 four discrete subcarriers among the 17 first subcarriers and the 17 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: -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 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 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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