Communication method and apparatus

Abstract

A communication method and apparatus, relating to the technical field of communications, which can improve system throughput while enabling the power of a resource unit (RU) to be amplified as much as possible. The method comprises: transmitting an orthogonal frequency division multiplexing (OFDM) symbol by means of a first resource unit. The first resource unit comprises 35 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 consecutive. The method and apparatus are applicable to wireless local area networks (WLANs) that support Institute of Electrical and Electronics Engineers (IEEE)-related standards. The IEEE-related standards comprise: the 802.11a / b / g standards, the 802.11n standard, the 802.11ac standard, the 802.11ax standard, the 802.11be standard, the 802.11bn standard / UHR standard / Wi-Fi 8 standard, the 802.11ad standard, the 802.11ay standard, the 802.11bf standard / sensing standard, the UWB standards / 802.15 standards, etc.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on February 27, 2024, with application number 202410217432.1 and application name “Communication Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

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

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

[0005] The present application provides a communication method and apparatus that can maximize the power of an RU while improving system throughput.

[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 35 groups of subcarriers and 1 single subcarrier, and each group of subcarriers includes a continuous first subcarrier, a second subcarrier, and a third subcarrier.

[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 three consecutive subcarriers, which is convenient for smoothing the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby reducing the packet error rate and improving system throughput.

[0008] In one possible design, when the transmission bandwidth is 40 MHz, 40 MHz includes 4 first resource units; the n-th group of subcarriers of the 4 first resource units are continuous, n = 1, 2,…, 35.

[0009] Based on this possible design, the four first resource units can be determined as evenly as possible in the 40 MHz bandwidth.

[0010] In one possible design, the first resource unit includes subcarrier indexes of: -244, -243, -242, -231, -230, -229, -218, -217, -216, -205, -204, -203, -192, -191, -190, -179, -178, -177, -166, -165, -164, -153, -152, -151, -140, -139, -138, -127, -126, -125, -114, -113, -112, -101, -100, -99, -88, -87, -86, -75, -74, -73, - 62, -61, -60, -48, -47, -46, -34, -33, -32, -20, -19, -18, -6, 8, 9, 10, 22, 23, 24, 36, 37, 38, 50, 51, 52, 64, 65, 66, 78, 79, 80, 92, 93, 94, 106, 107, 108, 120, 121, 122, 134, 135, 136, 148, 149, 150, 162, 163, 164, 176, 177, 178, 190, 191, 192, 204, 205, 206, 218, 219, 220, 232, 233, 234.

[0011] In one possible design, the first resource unit includes subcarrier indexes of: -241, -240, -239, -228, -227, -226, -215, -214, -213, -202, -201, -200, -189, -188, -187, -176, -175, -174, -163, -162, -161, -150, -149, -148, -137, -136, -135, -124, -123, -122, -111, -110, -109, -98, -97, -96, -85, -84, -83, -72, -71, -70, -59 , -58, -57, -45, -44, -43, -31, -30, -29, -17, -16, -15, -4, 11, 12, 13, 25, 26, 27, 39, 40, 41, 53, 54, 55, 67, 68, 69, 81, 82, 83, 95, 96, 97, 109, 110, 111, 123, 124, 125, 137, 138, 139, 151, 152, 153, 165, 166, 167, 179, 180, 181, 193, 194, 195, 207, 208, 209, 221, 222, 223, 235, 236, 237.

[0012] In one possible design, the first resource unit includes subcarrier indexes of: -238, -237, -236, -225, -224, -223, -212, -211, -210, -199, -198, -197, -186, -185, -184, -173, -172, -171, -160, -159, -158, -147, -146, -145, -134, -133, -132, -121, -120, -119, -108, -107, -106, -95, -94, -93, -82, -81, -80, -69, -68, -67, -56 , -55, -54, -42, -41, -40, -28, -27, -26, -14, -13, -12, 3, 14, 15, 16, 28, 29, 30, 42, 43, 44, 56, 57, 58, 70, 71, 72, 84, 85, 86, 98, 99, 100, 112, 113, 114, 126, 127, 128, 140, 141, 142, 154, 155, 156, 168, 169, 170, 182, 183, 184, 196, 197, 198, 210, 211, 212, 224, 225, 226, 238, 239, 240.

[0013] In one possible design, the first resource unit includes subcarrier indexes: -235, -234, -233, -222, -221, -220, -209, -208, -207, -196, -195, -194, -183, -182, -181, -170, -169, -168, -157, -156, -155, -144, -143, -142, -131, -130, -129, -118, -117, -116, -105, -104, -103, -92, -91, -90, -79, -78, -77, -66, -65, -64, -53, -52, -51, -39, -38, -37, -25, -24, -23, -11, -10, -9, 4, 17, 18, 19, 31, 32, 33, 45, 46, 47, 59, 60, 61, 73, 74, 75, 87, 88, 89, 101, 102, 103, 115, 116, 117, 129, 130, 131, 143, 144, 145, 157, 158, 159, 171, 172, 173, 185, 186, 187, 199, 200, 201, 213, 214, 215, 227, 228, 229, 241, 242, 243.

[0014] Based on the above four possible designs, multiple feasible solutions are provided for the design of the first resource unit.

[0015] In one possible design, the first resource unit includes 4 discrete pilot subcarriers; the 4 discrete pilot subcarriers of the first resource unit are respectively located in 4 groups of subcarriers among the 35 groups of subcarriers.

[0016] Based on this possible design, by determining the pilot subcarrier as one of three consecutive subcarriers, the combined gain of 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.

[0017] In one possible design, the four discrete pilot subcarriers of the first resource unit are respectively located in four groups of subcarriers among the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, 30th, 32nd, and 34th groups of subcarriers in the 35 groups of subcarriers; or, the four discrete pilot subcarriers of the first resource unit are respectively located in four groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st, and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0018] Based on this possible design, it can be seen from the above description of the first resource unit that each first resource unit contains 35 groups of continuous subcarriers. For the four first resource units in 40MHz, the nth group of subcarriers is continuous, that is, the nth group of subcarriers of the first resource unit 1, the nth group of subcarriers of the first resource unit 2, the nth group of subcarriers of the first resource unit 3, and the nth group of subcarriers of the first resource unit 4 are 12 continuous subcarriers. These 12 continuous subcarriers are called a block, and there are 35 blocks in total. 16 blocks can be selected from blocks 1-17 and 20-35, each with 1 pilot subcarrier set, for a total of 16 pilot subcarriers. Since blocks 18 and 19 are close to the DC subcarrier and are easily affected by carrier leakage, no pilot subcarrier is set. These 16 pilot subcarriers can be allocated to the four first resource units, and each first resource unit includes 4 pilot subcarriers.

[0019] Among them, by setting a pilot subcarrier in each of the above 16 blocks, it is possible to avoid the pilot subcarriers of the same / different first resource units being too close to each other, thereby avoiding narrowband interference contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0020] In one possible design, the four scattered pilot subcarriers of the first resource unit are the second subcarrier in each of the four groups of subcarriers.

[0021] Based on this possible design, the pilot subcarrier of the first resource unit can be ensured to be located in the middle of three consecutive subcarriers, which is conducive to obtaining a smooth gain for the pilot subcarrier. It can also be ensured that the sequence numbers of the four pilot subcarriers in the two second resource units determined based on the first resource unit are two odd numbers and two even numbers, thereby ensuring that the two third resource units determined based on the second resource unit can be allocated two pilot subcarriers.

[0022] In one possible design, the four discrete pilot subcarriers of the first resource unit are the four discrete second subcarriers in the 2nd, 10th, 20th, and 28th groups of subcarriers in the 35 groups of subcarriers; or, the four discrete pilot subcarriers of the first resource unit are the four discrete second subcarriers in the 4th, 12th, 22nd, and 30th groups of subcarriers in the 35 groups of subcarriers; or, the four discrete pilot subcarriers of the first resource unit are the four discrete second subcarriers in the 6th, 14th, 24th, and 32nd groups of subcarriers in the 35 groups of subcarriers; or, the four discrete pilot subcarriers of the first resource unit are the four discrete second subcarriers in the 8th, 16th, 26th, and 34th groups of subcarriers in the 35 groups of subcarriers. subcarrier; or, the 4 discrete pilot subcarriers of the first resource unit are the 4 discrete second subcarriers in the 1st, 9th, 19th and 27th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the first resource unit are the 4 discrete second subcarriers in the 3rd, 11th, 21st and 29th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the first resource unit are the 4 discrete second subcarriers in the 5th, 13th, 23rd and 31st groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the first resource unit are the 4 discrete second subcarriers in the 7th, 15th, 25th and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0023] In one possible design, the indexes of the four discrete pilot subcarriers of the first resource unit are: -230, -126, 23, 135; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -201, -97, 54, 166; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -172, -68, 85, 197; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -143, -38, 116, 228; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -234, -130, 18, 130; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: The subcarrier indexes are: -211, -107, 43, 155; or, the 4 discrete pilot subcarrier indexes of the first resource unit are: -188, -84, 68, 180; or, the 4 discrete pilot subcarrier indexes of the first resource unit are: -165, -61, 93, 205; or, the 4 discrete pilot subcarrier indexes of the first resource unit are: -217, -113, 37, 149; or, the 4 discrete pilot subcarrier indexes of the first resource unit are: -188, -84, 68, 180; or, the 4 discrete pilot subcarrier indexes of the first resource unit are: -159, -55, 99, 211.

[0024] Based on these two possible designs, pilot subcarriers can be distributed more evenly, preventing the pilot subcarriers in the first resource unit from being too close together. This, in turn, prevents narrowband interference from contaminating too many pilot subcarriers, which could lead to inaccurate phase offset estimation. Furthermore, pilot subcarriers can be kept away from guard subcarriers and DC subcarriers.

[0025] In one possible design, the subcarriers included in the first resource unit include two subcarriers included in the second resource unit; the second resource unit includes one subcarrier in the xth group of subcarriers in 35 groups of subcarriers, two consecutive subcarriers in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers; or, the second resource unit includes two consecutive subcarriers in the xth group of subcarriers in 35 groups of subcarriers, one subcarrier in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers; where x = 1, 3, 5,…, 31, 33; y = 2, 4, 6,…, 32, 34.

[0026] Based on this possible design, a second resource unit designed based on distributed RU technology is provided, which can discretize the limited number of subcarriers into a wider bandwidth to maximize the transmission power (that is, to obtain a better power amplification effect), that is, the above-mentioned second resource units can all achieve a larger power amplification factor. At the same time, the second resource unit can include two consecutive subcarriers, which is convenient for smoothing the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby reducing the packet error rate and improving system throughput.

[0027] In one possible design, the second resource unit includes the first subcarrier in the xth group of subcarriers, the first subcarrier and the second subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or, the second resource unit includes the second subcarrier and the third subcarrier in the xth group of subcarriers, the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

[0028] In one possible design, the second resource unit includes the first subcarrier and the second subcarrier in the xth group of subcarriers, the first subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or, the second resource unit includes the third subcarrier in the xth group of subcarriers, the second subcarrier and the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

[0029] Based on the above two possible designs, multiple feasible solutions are provided for the design of the second resource unit.

[0030] In one possible design, the second resource unit includes 4 discrete pilot subcarriers, and the 4 discrete pilot subcarriers of the second resource unit are 4 discrete subcarriers in 17 groups of consecutive subcarriers included in the second resource unit; the 17 groups of consecutive subcarriers include two consecutive subcarriers in the yth group of subcarriers; or, the 17 groups of consecutive subcarriers include two consecutive subcarriers in the xth group of subcarriers.

[0031] Based on this possible design, by determining the pilot subcarrier as one of two consecutive subcarriers, the combined gain of the consecutive subcarriers can be obtained at the pilot subcarrier. During the channel estimation process, the channel estimation can be made more accurate, thereby improving the phase deviation estimation accuracy and reducing the packet error rate.

[0032] In one possible design, the 4 discrete pilot subcarriers included in the second resource unit are respectively located in 4 groups of subcarriers among the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, 30th, 32nd and 34th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the second resource unit are respectively located in 4 groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0033] Based on this possible design, it is possible to avoid the pilot subcarriers of the same / different second resource units being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase offset estimation.

[0034] In one possible design, the four scattered pilot subcarriers of the second resource unit are the second subcarrier in each of the four groups of subcarriers.

[0035] Based on this possible design, since the pilot subcarrier of the first resource unit can be the same as the pilot subcarrier of the second resource unit, the four discrete pilot subcarriers of the second resource unit can be the second subcarrier in each of the four groups of subcarriers. This ensures that the pilot subcarrier of the first resource unit is located in the middle of three consecutive subcarriers, which helps its pilot subcarriers achieve smooth gain. It can also ensure that the sequence numbers of the four pilot subcarriers in the two second resource units determined based on the first resource unit are two odd numbers and two even numbers, thereby ensuring that the two third resource units determined based on the second resource unit can be allocated two pilot subcarriers.

[0036] In one possible design, the 4 discrete pilot subcarriers of the second resource unit are the 4 discrete second subcarriers in the 2nd, 10th, 20th, and 28th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the second resource unit are the 4 discrete second subcarriers in the 4th, 12th, 22nd, and 30th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the second resource unit are the 4 discrete second subcarriers in the 6th, 14th, 24th, and 32nd groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the second resource unit are the 4 discrete second subcarriers in the 8th, 16th, 26th, and 34th groups of subcarriers in the 35 groups of subcarriers. subcarrier; or, the 4 discrete pilot subcarriers of the second resource unit are the 4 discrete second subcarriers in the 1st, 9th, 19th and 27th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the second resource unit are the 4 discrete second subcarriers in the 3rd, 11th, 21st and 29th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the second resource unit are the 4 discrete second subcarriers in the 5th, 13th, 23rd and 31st groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the second resource unit are the 4 discrete second subcarriers in the 7th, 15th, 25th and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0037] In one possible design, the indexes of the four discrete pilot subcarriers of the second resource unit are: -230, -126, 23, 135; or, the indexes of the four discrete pilot subcarriers of the second resource unit are: -201, -97, 54, 166; or, the indexes of the four discrete pilot subcarriers of the second resource unit are: -172, -68, 85, 197; or, the indexes of the four discrete pilot subcarriers of the second resource unit are: -143, -38, 116, 228; or, the indexes of the four discrete pilot subcarriers of the second resource unit are: -234, -130, 18, 130; or, the indexes of the four discrete pilot subcarriers of the second resource unit are: The subcarrier indexes are: -211, -107, 43, 155; or, the 4 discrete pilot subcarrier indexes of the second resource unit are: -188, -84, 68, 180; or, the 4 discrete pilot subcarrier indexes of the second resource unit are: -165, -61, 93, 205; or, the 4 discrete pilot subcarrier indexes of the second resource unit are: -217, -113, 37, 149; or, the 4 discrete pilot subcarrier indexes of the second resource unit are: -188, -84, 68, 180; or, the 4 discrete pilot subcarrier indexes of the second resource unit are: -159, -55, 99, 211.

[0038] Based on these two possible designs, the pilot subcarriers can be distributed more evenly, preventing the pilot subcarriers in the second resource unit from being too close together. This can also prevent narrowband interference from contaminating too many pilot subcarriers, which could lead to inaccurate phase offset estimation. At the same time, the pilot subcarriers can be kept away from the guard subcarriers and DC subcarriers.

[0039] In one possible design, the subcarriers included in the second resource unit are the same as the subcarriers included in the two third resource units, and the third resource unit includes the odd-numbered subcarriers in the second resource unit; or, the third resource unit includes the even-numbered subcarriers in the second resource unit.

[0040] Based on this possible design, 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, obtain better power amplification effect), that is, each third resource unit in the above-mentioned third resource unit can achieve a larger power amplification factor.

[0041] In one possible design, the third resource unit includes two discrete pilot subcarriers, and the two discrete pilot subcarriers of the third resource unit are two pilot subcarriers with odd sorting numbers among the subcarriers of the second resource unit; or, the pilot subcarriers included in the third resource unit are two pilot subcarriers with even sorting numbers among the subcarriers of the second resource unit.

[0042] Based on this possible design, the pilot subcarriers included in the third resource unit can also be determined according to the pilot subcarriers included in the second resource unit.

[0043] In one possible design, the subcarriers included in the first resource unit are a subset of the subcarriers included in the fourth resource unit, and the fourth resource unit includes 2 first resource units, 1 26-tone DRU and 4 single subcarriers.

[0044] Based on this possible design, a fourth 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, each of the above two fourth resource units can achieve a larger power amplification factor. At the same time, each fourth resource unit can include three consecutive subcarriers, which is convenient for smoothing the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby reducing the packet error rate and improving system throughput.

[0045] In one possible design, the fourth resource unit includes the first first resource unit, the third first resource unit, one 26-tone DRU and four single subcarriers; or, the fourth resource unit includes the second first resource unit, the fourth first resource unit, one 26-tone DRU and four single subcarriers.

[0046] Based on this possible design, multiple feasible solutions are provided for the design of the fourth resource unit.

[0047] In one possible design, the fourth resource unit includes 8 discrete pilot subcarriers, and the 8 discrete pilot subcarriers of the fourth resource unit are the pilot subcarriers of the 2 first resource units included in the fourth resource unit.

[0048] Based on this possible design, the pilot subcarriers can be distributed more evenly, avoiding the pilot subcarriers of the fourth resource unit being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0049] In one possible design, the 8 discrete pilot subcarriers of the fourth resource unit include the 4 discrete pilot subcarriers of the first first resource unit and the 4 discrete pilot subcarriers of the third first resource unit; or, the 8 discrete pilot subcarriers of the fourth resource unit include the 4 discrete pilot subcarriers of the second first resource unit and the 4 discrete pilot subcarriers of the fourth first resource unit.

[0050] Based on this possible design, multiple feasible solutions are provided for the design of the pilot subcarrier of the fourth resource unit.

[0051] In the second aspect, the present application provides a communication device, which can be applied to the first communication device of the first aspect above to implement the functions performed by the first communication device above. The communication device can be the first communication device, or it can be the chip or chip system or system on chip of the first communication device, etc. The communication device can perform the functions performed by the first communication device above through hardware, or it can perform the corresponding software implementation through hardware. The hardware or software includes one or more modules corresponding to the above functions. For example, a transmission module and a processing module. The transmission module can independently complete the following transmission operations, or it can cooperate with the processing module to complete the following transmission operations; accordingly, the processing module can also independently complete the following processing operations, or it can cooperate with the transmission module to complete the following processing operations, without limitation.

[0052] Exemplarily, a transmission module is used to transmit OFDM symbols through a first resource unit; wherein the first resource unit includes 35 groups of subcarriers and 1 single subcarrier, and each group of subcarriers includes a continuous first subcarrier, a second subcarrier and a third subcarrier.

[0053] Optionally, the transmission module and processing module of the communication device in the second aspect can also perform the corresponding functions in any possible design of the above-mentioned first aspect. Please refer to the detailed description in the method example for details. The beneficial effects that can be achieved can also be referred to the aforementioned related content.

[0054] In a third aspect, an embodiment of the present application provides a communication device, which includes one or more transceivers, and the transceivers execute the communication method described in the first aspect under the control of a processor.

[0055] In one possible design, the communication device further includes one or more memories, the one or more memories being coupled to one or more processors, and the one or more memories being used to store computer programs or instructions. In one possible implementation, the memory is located outside the communication device. In another possible implementation, the memory is located within the communication device. In an embodiment of the present application, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together. In one possible implementation, the communication device further includes a transceiver, and the transceiver is used to receive information and / or send information.

[0056] 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.

[0057] In a fourth 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 the first aspect under the control of the logic circuit.

[0058] In a fifth 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 the first aspect is executed.

[0059] In a sixth aspect, an embodiment of the present application provides a computer program product comprising computer instructions, which, when run on a computer, enables the communication method described in the first aspect to be executed.

[0060] In a seventh aspect, an embodiment of the present application provides a computer program, which, when executed on a computer, enables the communication method described in the first aspect to be executed.

[0061] In an eighth aspect, an embodiment of the present application provides a chip, comprising: a transceiver unit, the transceiver unit being configured to execute the communication method as described in the first aspect under the control of a processing unit.

[0062] Among them, the technical effects brought about by any design method from the third aspect to the eighth aspect can refer to the technical effects brought about by the above-mentioned first aspect and will not be repeated here.

[0063] In a ninth aspect, an embodiment of the present application provides a communication system, which may include a communication device for executing the communication method described in the first aspect or any possible design of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] FIG1 is a schematic diagram of a 20 MHz subcarrier distribution according to an embodiment of the present application;

[0065] FIG2 is a schematic diagram of a 40 MHz subcarrier distribution according to an embodiment of the present application;

[0066] FIG3 is a schematic diagram of an 80 MHz subcarrier distribution according to an embodiment of the present application;

[0067] FIG4 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0068] FIG5 is a schematic diagram of the composition of a communication device provided in an embodiment of the present application;

[0069] FIG6 is a flow chart of a communication method provided in an embodiment of the present application;

[0070] FIG7 is a schematic diagram of an index of subcarriers included in a first resource unit provided in an embodiment of the present application;

[0071] FIG8 is a schematic diagram of an index of subcarriers included in a second resource unit provided in an embodiment of the present application;

[0072] FIG9 is a flow chart of a communication method provided in an embodiment of the present application;

[0073] FIG10 is a flow chart of a communication method provided in an embodiment of the present application;

[0074] FIG11 is a flow chart of a communication method provided in an embodiment of the present application;

[0075] FIG12 is a flow chart of a communication method provided in an embodiment of the present application;

[0076] FIG13 is a schematic diagram of an index of subcarriers included in a first resource unit provided in an embodiment of the present application;

[0077] FIG14 is a flow chart of a communication method provided in an embodiment of the present application;

[0078] FIG15 is a flow chart of a communication method provided in an embodiment of the present application;

[0079] FIG16 is a flow chart of a communication method provided in an embodiment of the present application;

[0080] FIG17 is a schematic diagram of an uplink multi-user transmission provided in an embodiment of the present application;

[0081] FIG18 is a schematic diagram of a frame structure of a trigger frame provided in an embodiment of the present application;

[0082] FIG19 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0083] Figure 20 is a schematic diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0084] The technical solution provided in the embodiments of the present application can be applied to wireless local area networks (WLANs) that support relevant standards of the Institute of Electrical and Electronics Engineers (IEEE). The relevant IEEE standards include: 802.11a / b / g standards, 802.11n standards, 802.11ac standards, 802.11ax standards, 802.11be standards, 802.11bn standards / ultra-high reliability (UHR) standards / Wi-Fi 8 standards, 802.11ad standards, 802.11ay standards, 802.11bf standards / sensing standards, ultra-wide band (UWB) standards / 802.15 standards, etc.

[0085] In terms of bandwidth configuration, the 802.11ax standard currently supports the following bandwidth configurations: 20MHz, 40MHz, 80MHz, 160MHz, and 80+80MHz. The 802.11be standard also supports 320MHz bandwidth configuration.

[0086] The difference between 160MHz and 80+80MHz is that the former is a continuous frequency band, while the two 80MHz bands in the latter can be separated.

[0087] In a WLAN communication system, resource allocation can be performed in units of resource units (RUs), and communication devices can communicate with each other via RUs. The following describes RUs in detail using various examples of RU-based subcarrier distribution (tone plan) as an example.

[0088] In the first example, as shown in Figure 1, when the bandwidth is 20 MHz, the entire bandwidth can be composed of a 242-tone RU, or various combinations of 26-tone RUs, 52-tone RUs, and 106-tone RUs. Each RU includes data subcarriers and pilot subcarriers. The data subcarriers carry data information, while the pilot subcarriers are used to estimate phase and frequency offsets. In addition to the RU, some guard subcarriers, null subcarriers, or direct current (DC) subcarriers may also be included.

[0089] In the second example, as shown in Figure 2, when the bandwidth is 40 MHz, the entire bandwidth is roughly equivalent to a replication of the 20 MHz subcarrier distribution. The entire bandwidth can be composed of a whole 484-tone RU or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, and 242-tone RU.

[0090] In the third example, as shown in Figure 3, when the bandwidth is 80 MHz, the entire bandwidth can be composed of four 242-tone RUs. Alternatively, the entire bandwidth can be composed of a 996-tone RU, or various combinations of 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, and 484-tone RUs. 484L and 484R represent the left and right halves of a 484-tone RU, respectively, each containing 242 subcarriers. This is another schematic diagram of 484+5DC.

[0091] In the fourth example, when the bandwidth is 160 MHz, the entire bandwidth can be viewed as a replication of two 80 MHz subcarrier distributions. The entire bandwidth can be composed of a whole 2*996-tone RU, or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU, and 996-tone RU.

[0092] 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.

[0093] Based on the description of subcarrier distribution in various examples above, with 242-tone RU as the unit, the left side of the figure can be regarded as the lowest frequency and the right side of the figure can be regarded as the highest frequency. From left to right, the 242-tone RU can be numbered: 1 st , 2 ndIt is understood that, in the data field, at most 16 242-tone RUs correspond to 16 20 MHz channels in ascending order of frequency.

[0094] In addition to the RU types mentioned above, the 802.11be standard also introduces the following RU types: a 52-tone RU and a 26-tone RU consisting of a 52+26-tone RU; a 106+26-tone RU consisting of a 106-tone RU and a 26-tone RU; a 484+242-tone RU consisting of a 484-tone RU and a 242-tone RU; a 996+484-tone RU consisting of a 996-tone RU and a 484-tone RU; a 2*996+484-tone RU consisting of two 996-tone RUs and a 484-tone RU; a 3*996-tone RU consisting of three 996-tone RUs; and a 3*996+484-tone RU consisting of three 996-tone RUs and a 484-tone RU. At the bandwidth level, a 26-tone RU corresponds to approximately 2 MHz, a 52-tone RU corresponds to approximately 4 MHz, a 106-tone RU corresponds to approximately 8 MHz, and a 242-tone RU corresponds to approximately 20 MHz. The sizes of other RUs can be added or multiplied accordingly and are not detailed here.

[0095] In addition, with the continuous development of communication technology, strict restrictions are placed on maximum power and maximum power spectrum density, that is, the transmission power of a communication device cannot exceed the maximum power value, and the transmitted power spectrum density cannot exceed the maximum power spectrum density.

[0096] For example, taking the description of the indoor low power (LPI) communication method in the 6GHz spectrum regulations as an example, as shown in Table 1 below, for a client connected to a low-power access point, such as a station (STA), taking the transmit power as the equivalent isotropic radiated power (EIRP) as an example, the maximum power is 24dBm and the maximum power spectral density is -1dBm / MHz. Compared with the maximum power, the maximum power spectral density is more strictly limited, and the maximum power allowed to be transmitted is usually more limited by the power spectral density. For the station, the maximum power limit specified in the regulations is reached when the bandwidth is the maximum 320MHz. Below this bandwidth, it can only transmit a lower power due to the limitation of the maximum power spectral density.

[0097] Table 1

[0098] In another example, taking the description of LPI communication methods in the 6GHz spectrum regulations as an example, as shown in Table 2 below, for access points (APs) and / or STAs, taking the transmit power as equivalent isotropic radiated power (EIRP) as an example, the maximum power is 23dBm and the maximum power spectral density is 10dBm / MHz. When the bandwidth does not exceed 20MHz, the AP / STA transmit power is primarily limited by the maximum power spectral density. When the bandwidth is greater than 20MHz, the AP / STA transmit power is primarily limited by the maximum power.

[0099] Table 2

[0100] Based on the above description of maximum power and maximum power spectral density, the above RU design meets the limitations of maximum power and maximum power spectral density while leaving room for further power amplification.

[0101] 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 includes 35 groups of subcarriers and 1 single subcarrier, and each group of subcarriers includes a continuous first subcarrier, a second subcarrier and a third subcarrier.

[0102] The present invention provides a first resource unit (RU) designed based on distributed resource unit (DRU) technology (also known as discrete RU technology), which can discretize a limited number of subcarriers into a wider bandwidth to improve transmit power. Furthermore, the first resource unit can include three consecutive subcarriers, which facilitates smoothing of the estimated channel coefficients during channel estimation to obtain a channel smoothing gain, thereby improving the accuracy of channel estimation, thereby reducing the packet error rate (PER), and improving system throughput.

[0103] The following describes in detail the implementation of the embodiments of the present application in conjunction with the accompanying drawings.

[0104] The communication method provided in the embodiment of the present application is applicable to a wireless local area network (WLAN) that supports the relevant standards of the Institute of Electrical and Electronics Engineers (IEEE). The relevant IEEE standards include: 802.11a / b / g standards, 802.11n standards, 802.11ac standards, 802.11ax standards, 802.11be standards, 802.11bn standards / UHR standards / WiFi8 standards, 802.11ad standards, 802.11ay standards, 802.11bf standards / sensing standards, UWB standards / 802.15 standards, etc., without limitation.

[0105] The following describes the WLAN communication system provided in an embodiment of the present application using FIG. 4 as an example.

[0106] Figure 4 is a schematic diagram of a communication system provided in an embodiment of the present application. As shown in Figure 4, the communication system may include access point devices and site devices; wherein, one or more access point devices can communicate with one or more site devices, the access point device can also communicate with one or more other access point devices, and the site device can also communicate with one or more other site devices.

[0107] The access point device may be an AP, and the station device may be a STA.

[0108] Exemplarily, the AP can be a device that supports multiple WLAN standards such as the 802.11be standard or future Wi-Fi standards; it can also be a device that supports the 802.11a / b / g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, 802.11be standard, 802.11bn standard / UHR standard / WiFi8 standard, without limitation.

[0109] For example, an AP can be a terminal device equipped with a Wi-Fi chip, a network device, a communications server, a router, a switch, a bridge, or a computer. APs can also serve as access points for mobile users to wired networks. They are primarily deployed in homes, buildings, and campuses, with a typical coverage radius of tens to hundreds of meters. They can also be deployed outdoors. An AP acts as a bridge between wired and wireless networks, connecting wireless network clients and then connecting the wireless network to the Ethernet.

[0110] Exemplarily, a STA may be a device that supports multiple WLAN standards, such as the 802.11be standard or future Wi-Fi standards; or a device that supports the 802.11a / b / g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, 802.11be standard, 802.11bn standard / UHR standard / WiFi8 standard, without limitation.

[0111] For example, a STA can be a wireless communication chip, wireless sensor, wireless communication terminal, communication server, router, switch, bridge, computer, etc. For example, a 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, an in-vehicle communication device supporting Wi-Fi communication function, a computer supporting Wi-Fi communication function, etc., without limitation.

[0112] In a specific implementation, as shown in Figure 4 , for example, each access point device and station device may also adopt the structure shown in Figure 5 , or include the components shown in Figure 5 . Figure 5 is a schematic diagram of the structure of a communication device 500 provided in an embodiment of the present application. The communication device 500 may be an access point device or a chip or system-on-chip within an access point device; it may also be a station device or a chip or system-on-chip within a station device. As shown in Figure 5 , the communication device 500 includes a processor 501, a transceiver 502, and a communication circuit 503.

[0113] Furthermore, the communication device 500 may further include a memory 504 , wherein the processor 501 , the memory 504 and the transceiver 502 may be connected via a communication line 503 .

[0114] 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.

[0115] The transceiver 502 is used to communicate with other devices or other communication networks. The other communication networks may be Ethernet, a radio access network (RAN), etc. The transceiver 502 may be a module, a circuit, a transceiver, or any device capable of implementing communication.

[0116] The communication line 503 is used to transmit information between the components included in the communication device 500.

[0117] The memory 504 is used to store instructions, where the instructions may be computer programs.

[0118] The memory 504 may be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions, or a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0119] It should be noted that the memory 504 can exist independently of the processor 501 or can be integrated with the processor 501. The memory 504 can be used to store instructions, program code, or some data. The memory 504 can be located within the communication device 500 or outside the communication device 500, without limitation. The processor 501 is configured to execute the instructions stored in the memory 504 to implement the communication method provided in the following embodiments of this application.

[0120] In an example, the processor 501 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 5 .

[0121] As an optional implementation, the communication device 500 includes multiple processors. For example, in addition to the processor 501 in FIG. 5 , it may also include a processor 507 .

[0122] As an optional implementation, the communication apparatus 500 further includes an output device 505 and an input device 506. For example, the input device 506 is a keyboard, a mouse, a microphone, a joystick, or the like, and the output device 505 is a display screen, a speaker, or the like.

[0123] It should be noted that the communication device 500 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a structure similar to that shown in FIG5 . Furthermore, the structure shown in FIG5 does not limit the communication device. In addition to the components shown in FIG5 , the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0124] In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices.

[0125] In addition, the actions and terms involved in the various embodiments of this application can refer to each other without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are only examples, and other names can also be used in specific implementations without limitation.

[0126] The communication method provided in an embodiment of the present application is described below in conjunction with the communication system shown in FIG4 and with reference to FIG6 below. The first communication device may be any access point device or station device in the communication system shown in FIG4. The first communication device described in the following embodiment may include FIG5 or the components shown in FIG5.

[0127] FIG6 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG6 , the method may include:

[0128] Step 601: A first communication device transmits an OFDM symbol through a first resource unit.

[0129] Optionally, before step 601, the method may further include: step 600, generating orthogonal frequency division multiplexing (OFDM) symbols.

[0130] The first resource unit may include 35 groups of subcarriers and 1 single subcarrier, each group of subcarriers includes a continuous first subcarrier, a second subcarrier, and a third subcarrier. The first resource unit may also be called a 106-tone DRU.

[0131] It is understandable that the term "group" in the embodiments of the present application is a logical concept, not a technical feature. It is used merely to facilitate description of the three consecutive subcarriers present in the first resource unit. The first resource unit can also be described as including three consecutive subcarriers and a single subcarrier, where the three consecutive subcarriers appear 35 times and the single subcarrier appears once.

[0132] In addition, the “continuous” in the embodiment of the present application includes continuity in a physical sense, that is, there are no other subcarriers between the continuous first subcarrier, the second subcarrier and the third subcarrier.

[0133] 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 the continuous first subcarrier, second subcarrier and third subcarrier.

[0134] Exemplarily, taking the subcarrier index included in 40MHz as [-256:255] as an example, when determining the subcarriers included in the first resource unit, the subcarrier index considered is [-244:-3, 3:244], where [-256:-245, 245:255] is the protection subcarrier, [-2:2] is the DC subcarrier, and the protection subcarrier and the DC subcarrier are both 0. That is, the subcarrier with an index of -3 and the subcarrier with an index of 3 can be considered as 2 consecutive subcarriers in the first resource unit. Or it can be described as: if the first subcarrier index of the first resource unit is -3 and the second subcarrier index is 3, the first subcarrier and the second subcarrier can be considered to be continuous. Or, if the second subcarrier index of the first resource unit is -3 and the third subcarrier index is 3, the second subcarrier and the third subcarrier can be considered to be continuous.

[0135] Similarly, the "discrete" in the embodiments of the present application refers to the discreteness after the DC subcarrier is removed, or it can be described as the presence of at least one subcarrier other than the DC subcarrier between two discrete subcarriers. Exemplarily, there is at least one subcarrier with an index in the range of [-244:-3, 3:244] between two discrete subcarriers.

[0136] Optionally, when the transmission bandwidth is 40 MHz, 40 MHz may include 4 first resource units, and the n-th groups of subcarriers of the 4 first resource units are continuous.

[0137] Where n = 1, 2,…, 35.

[0138] For example, the nth group of subcarriers of the first resource unit 1 includes the first subcarrier 1-n-1, the second subcarrier 1-n-2, and the third subcarrier 1-n-3; the nth group of subcarriers of the first resource unit 2 includes the first subcarrier 2-n-1, the second subcarrier 2-n-2, and the third subcarrier 2-n-3; the nth group of subcarriers of the first resource unit 3 includes the first subcarrier 3-n-1, the second subcarrier 3-n-2, and the third subcarrier 3-n-3; the nth group of subcarriers of the first resource unit 4 includes the first subcarrier 4-n-1, the second subcarrier 4-n-2, and the third subcarrier 4-n-3. Taking 4-n-2 and the third subcarrier 4-n-3 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, third subcarrier 1-n-3, first subcarrier 2-n-1, second subcarrier 2-n-2, third subcarrier 2-n-3, first subcarrier 3-n-1, second subcarrier 3-n-2, third subcarrier 3-n-3, first subcarrier 4-n-1, second subcarrier 4-n-2, third subcarrier 4-n-3).

[0139] Based on the above description of the first resource unit, the following four possible examples are provided with reference to the following:

[0140] In the first example, the indexes of the subcarriers included in the first resource unit are: -244, -243, -242, -231, -230, -229, -218, -217, -216, -205, -204, -203, -192, -191, -190, -179, -178, -177, -166, -165, -164, -153, -152, -151, -140, -139, -138, -127, -126, -125, -114, -113, -112, -101, -100, -99, -88, -87, -86, -75, -74, -73, -6 2, -61, -60, -48, -47, -46, -34, -33, -32, -20, -19, -18, -6, 8, 9, 10, 22, 23, 24, 36, 37, 38, 50, 51, 52, 64, 65, 66, 78, 79, 80, 92, 93, 94, 106, 107, 108, 120, 121, 122, 134, 135, 136, 148, 149, 150, 162, 163, 164, 176, 177, 178, 190, 191, 192, 204, 205, 206, 218, 219, 220, 232, 233, 234.

[0141] In the second example, the indexes of the subcarriers included in the first resource unit are: -241, -240, -239, -228, -227, -226, -215, -214, -213, -202, -201, -200, -189, -188, -187, -176, -175, -174, -163, -162, -161, -150, -149, -148, -137, -136, -135, -124, -123, -122, -111, -110, -109, -98, -97, -96, -85, -84, -83, -72, -71, -70, -59, -58, -57, -45, -44, -43, -31, -30, -29, -17, -16, -15, -4, 11, 12, 13, 25, 26, 27, 39, 40, 41, 53, 54, 55, 67, 68, 69, 81, 82, 83, 95, 96, 97, 109, 110, 111, 123, 124, 125, 137, 138, 139, 151, 152, 153, 165, 166, 167, 179, 180, 181, 193, 194, 195, 207, 208, 209, 221, 222, 223, 235, 236, 237.

[0142] In a third example, the indexes of the subcarriers included in the first resource unit are: -238, -237, -236, -225, -224, -223, -212, -211, -210, -199, -198, -197, -186, -185, -184, -173, -172, -171, -160, -159, -158, -147, -146, -145, -134, -133, -132, -121, -120, -119, -108, -107, -106, -95, -94, -93, -82, -81, -80, -69, -68, -67, -56, -55, -54, -42, -41, -40, -28, -27, -26, -14, -13, -12, 3, 14, 15, 16, 28, 29, 30, 42, 43, 44, 56, 57, 58, 70, 71, 72, 84, 85, 86, 98, 99, 100, 112, 113, 114, 126, 127, 128, 140, 141, 142, 154, 155, 156, 168, 169, 170, 182, 183, 184, 196, 197, 198, 210, 211, 212, 224, 225, 226, 238, 239, 240.

[0143] In the fourth example, the indexes of the subcarriers included in the first resource unit are: -235, -234, -233, -222, -221, -220, -209, -208, -207, -196, -195, -194, -183, -182, -181, -170, -169, -168, -157, -156, -155, -144, -143, -142, -131, -130, -129, -118, -117, -116, -105, -104, -103, -92, -91, -90, -79, -78, -77, -66, -65, -64, -53, - 52, -51, -39, -38, -37, -25, -24, -23, -11, -10, -9, 4, 17, 18, 19, 31, 32, 33, 45, 46, 47, 59, 60, 61, 73, 74, 75, 87, 88, 89, 101, 102, 103, 115, 116, 117, 129, 130, 131, 143, 144, 145, 157, 158, 159, 171, 172, 173, 185, 186, 187, 199, 200, 201, 213, 214, 215, 227, 228, 229, 241, 242, 243.

[0144] Optionally, 40 MHz may include the four first resource units shown in the above four examples.

[0145] Optionally, the subcarrier corresponding to the first resource unit may be determined based on the following method:

[0146] Among them, 484 subcarriers (i.e., subcarriers indexed as [-244:-3, 3:244]) can be divided into 36 parts of subcarriers, each part of subcarriers can include 13, 14 or 9 subcarriers, for each part of subcarriers including 13 or 14 subcarriers, 3 consecutive subcarriers can be sequentially allocated to 4 first resource units in sequence, for a part of subcarriers including 9 subcarriers, 4 subcarriers in the part of subcarriers can be respectively allocated to 4 first resource units, and the remaining subcarriers in each part of subcarriers are not allocated.

[0147] For example, as shown in FIG7 , each of the 1st to 14th and 36th parts of the 36 parts of subcarriers may include 13 subcarriers, each of the 15th to 18th and 20th to 35th parts of subcarriers may include 14 subcarriers, and the 19th part of subcarriers may include 9 subcarriers.

[0148] The first resource unit 1 may include the 1st, 2nd, and 3rd subcarriers in the 1st-18th and 20th-36th parts of subcarriers, and the 1st subcarrier in the 19th part of subcarriers.

[0149] The first resource unit 2 may include the 4th, 5th, and 6th subcarriers in the 1st-18th and 20th-36th subcarrier parts, and the 3rd subcarrier in the 19th subcarrier part.

[0150] The first resource unit 3 may include the 7th, 8th, and 9th subcarriers in the 1st-18th and 20th-36th parts of subcarriers, and the 5th subcarrier in the 19th part of subcarriers.

[0151] The first resource unit 4 may include the 10th, 11th, and 12th subcarriers in the 1st-18th and 20th-36th parts of subcarriers, and the 6th subcarrier in the 19th part of subcarriers.

[0152] Optionally, the first communication device transmitting OFDM symbols through the first resource unit can be understood as: sending OFDM symbols through the first resource unit, or receiving OFDM symbols through the first resource unit, without limitation.

[0153] Optionally, taking the OFDM symbol as an OFDM symbol of a physical layer protocol data unit (PPDU) as an example, the first communication device can transmit the OFDM symbol corresponding to the long training sequence (LTF) field or data field in the PPDU through the first resource unit.

[0154] 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 40 MHz channels.

[0155] Based on the first resource unit shown in FIG. 6 to FIG. 7 , optionally, the second resource unit can also be determined based on the first resource unit.

[0156] The subcarriers included in the first resource unit include two subcarriers included in the second resource unit; the second resource unit includes one subcarrier in the xth group of subcarriers in the 35 groups of subcarriers, two consecutive subcarriers in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers. Alternatively, the second resource unit includes two consecutive subcarriers in the xth group of subcarriers in the 35 groups of subcarriers, one subcarrier in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers; x = 1, 3, 5, ..., 31, 33; y = 2, 4, 6, ..., 32, 34. This second resource unit may also be called a 52-tone DRU.

[0157] In a first possible design, the second resource unit includes the first subcarrier in the xth group of subcarriers, the first subcarrier and the second subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or, the second resource unit includes the second subcarrier and the third subcarrier in the xth group of subcarriers, the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

[0158] Exemplarily, eight second resource units may be determined based on the four first resource units shown in FIG. 6 to FIG. 7 , as shown below:

[0159] As shown in Figure 8, for the xth group of subcarriers of each first resource unit (i.e., the 1st, 3rd, 5th, ..., 31st, 33rd group of subcarriers): the first subcarrier in the xth group of subcarriers of the first resource unit 1 is allocated to the second resource unit 1, and the second and third subcarriers in the xth group of subcarriers of the first resource unit 1 are allocated to the second resource unit 2. The first subcarrier in the xth group of subcarriers of the first resource unit 2 is allocated to the second resource unit 3, and the second and third subcarriers in the xth group of subcarriers of the first resource unit 2 are allocated to the second resource unit 4. The first subcarrier in the xth group of subcarriers of the first resource unit 3 is allocated to the second resource unit 5, and the second and third subcarriers in the xth group of subcarriers of the first resource unit 3 are allocated to the second resource unit 6. The first subcarrier in the xth group of subcarriers of the first resource unit 4 is allocated to the second resource unit 7, and the second and third subcarriers in the xth group of subcarriers of the first resource unit 4 are allocated to the second resource unit 8.

[0160] As shown in Figure 8, for the yth group of subcarriers of each first resource unit (i.e., the 2nd, 4th, 6th, ..., 32nd, 34th group of subcarriers): the first subcarrier and the second subcarrier in the yth group of subcarriers of the first resource unit 1 are allocated to the second resource unit 1, and the third subcarrier in the yth group of subcarriers of the first resource unit 1 is allocated to the second resource unit 2. The first subcarrier and the second subcarrier in the yth group of subcarriers of the first resource unit 2 are allocated to the second resource unit 3, and the third subcarrier in the yth group of subcarriers of the first resource unit 2 is allocated to the second resource unit 4. The first subcarrier and the second subcarrier in the yth group of subcarriers of the first resource unit 3 are allocated to the second resource unit 5, and the third subcarrier in the yth group of subcarriers of the first resource unit 3 is allocated to the second resource unit 6. The first subcarrier and the second subcarrier in the yth group of subcarriers of the first resource unit 4 are allocated to the second resource unit 7, and the third subcarrier in the yth group of subcarriers of the first resource unit 4 is allocated to the second resource unit 8.

[0161] As shown in Figure 8, for the 35th group of subcarriers of each first resource unit: the first subcarrier in the 35th group of subcarriers of first resource unit 1 is allocated to second resource unit 1, and the second subcarrier in the 35th group of subcarriers of first resource unit 1 is allocated to second resource unit 2. The first subcarrier in the 35th group of subcarriers of first resource unit 2 is allocated to second resource unit 3, and the second subcarrier in the 35th group of subcarriers of first resource unit 2 is allocated to second resource unit 4. The first subcarrier in the 35th group of subcarriers of first resource unit 3 is allocated to second resource unit 5, and the second subcarrier in the 35th group of subcarriers of first resource unit 3 is allocated to second resource unit 6. The first subcarrier in the 35th group of subcarriers of first resource unit 4 is allocated to second resource unit 7, and the second subcarrier in the 35th group of subcarriers of first resource unit 4 is allocated to second resource unit 8.

[0162] The indexes of the subcarriers included in the second resource unit 1 are: -244, -231, -230, -218, -205, -204, -192, -179, -178, -166, -153, -152, -140, -127, -126, -114, -101, -100, -88, -75, -74, -62, -48, -47, -34, -20, -19, 8, 22, 23, 36, 50, 51, 64, 78, 79, 92, 106, 107, 120, 134, 135, 148, 162, 163, 176, 190, 191, 204, 218, 219, 232; or

[0163] The indexes of the subcarriers included in the second resource unit 2 are: -243, -242, -229, -217, -216, -203, -191, -190, -177, -165, -164, -151, -139, -138, -125, -113, -112, -99, -87, -86, -73, -61, -60, -46, -33, -32, -18, 9, 10, 24, 37, 38, 52, 65, 66, 80, 93, 94, 108, 121, 122, 136, 149, 150, 164, 177, 178, 192, 205, 206, 220, 233; or

[0164] The indexes of the subcarriers included in the second resource unit 3 are: -241, -228, -227, -215, -202, -201, -189, -176, -175, -163, -150, -149, -137, -124, -123, -111, -98, -97, -85, -72, -71, -59, -45, -44, -31, -17, -16, 11, 25, 26, 39, 53, 54, 67, 81, 82, 95, 109, 110, 123, 137, 138, 151, 165, 166, 179, 193, 194, 207, 221, 222, 235; or

[0165] The indexes of the subcarriers included in the second resource unit 4 are: -240, -239, -226, -214, -213, -200, -188, -187, -174, -162, -161, -148, -136, -135, -122, -110, -109, -96, -84, -83, -70, -58, -57, -43, -30, -29, -15, 12, 13, 27, 40, 41, 55, 68, 69, 83, 96, 97, 111, 124, 125, 139, 152, 153, 167, 180, 181, 195, 208, 209, 223, 236; or

[0166] The indexes of the subcarriers included in the second resource unit 5 are: -238, -225, -224, -212, -199, -198, -186, -173, -172, -160, -147, -146, -134, -121, -120, -108, -95, -94, -82, -69, -68, -56, -42, -41, -28, -14, -13, 14, 28, 29, 42, 56, 57, 70, 84, 85, 98, 112, 113, 126, 140, 141, 154, 168, 169, 182, 196, 197, 210, 224, 225, 238; or

[0167] The indexes of the subcarriers included in the second resource unit 6 are: -237, -236, -223, -211, -210, -197, -185, -184, -171, -159, -158, -145, -133, -132, -119, -107, -106, -93, -81, -80, -67, -55, -54, -40, -27, -26, -12, 15, 16, 30, 43, 44, 58, 71, 72, 86, 99, 100, 114, 127, 128, 142, 155, 156, 170, 183, 184, 198, 211, 212, 226, 239; or

[0168] The indexes of the subcarriers included in the second resource unit 7 are: -235, -222, -221, -209, -196, -195, -183, -170, -169, -157, -144, -143, -131, -118, -117, -105, -92, -91, -79, -66, -65, -53, -39, -38, -25, -11, -10, 17, 31, 32, 45, 59, 60, 73, 87, 88, 101, 115, 116, 129, 143, 144, 157, 171, 172, 185, 199, 200, 213, 227, 228, 241; or

[0169] The indexes of the subcarriers included in the second resource unit 8 are: -234, -233, -220, -208, -207, -194, -182, -181, -168, -156, -155, -142, -130, -129, -116, -104, -103, -90, -78, -77, -64, -52, -51, -37, -24, -23, -9, 18, 19, 33, 46, 47, 61, 74, 75, 89, 102, 103, 117, 130, 131, 145, 158, 159, 173, 186, 187, 201, 214, 215, 229, and 242.

[0170] In a second possible design, the second resource unit includes the first subcarrier and the second subcarrier in the xth group of subcarriers, the first subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or, the second resource unit includes the third subcarrier in the xth group of subcarriers, the second subcarrier and the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

[0171] Exemplarily, eight second resource units may be determined based on the four first resource units shown in FIG. 6 to FIG. 7 , as shown below:

[0172] For the xth group of subcarriers of each first resource unit (i.e., the 1st, 3rd, 5th, …, 31st, 33rd group of subcarriers): the first subcarrier and the second subcarrier in the xth group of subcarriers of the first resource unit 1 are allocated to the second resource unit 1, and the third subcarrier in the xth group of subcarriers of the first resource unit 1 is allocated to the second resource unit 2. The first subcarrier and the second subcarrier in the xth group of subcarriers of the first resource unit 2 are allocated to the second resource unit 3, and the third subcarrier in the xth group of subcarriers of the first resource unit 2 is allocated to the second resource unit 4. The first subcarrier and the second subcarrier in the xth group of subcarriers of the first resource unit 3 are allocated to the second resource unit 5, and the third subcarrier in the xth group of subcarriers of the first resource unit 3 is allocated to the second resource unit 6. The first subcarrier and the second subcarrier in the xth group of subcarriers of the first resource unit 4 are allocated to the second resource unit 7, and the third subcarrier in the xth group of subcarriers of the first resource unit 4 is allocated to the second resource unit 8.

[0173] For the yth group of subcarriers of each first resource unit (i.e., the 2nd, 4th, 6th, …, 32nd, 34th group of subcarriers): the first subcarrier in the yth group of subcarriers of the first resource unit 1 is allocated to the second resource unit 1, and the second and third subcarriers in the yth group of subcarriers of the first resource unit 1 are allocated to the second resource unit 2. The first subcarrier in the yth group of subcarriers of the first resource unit 2 is allocated to the second resource unit 3, and the second and third subcarriers in the yth group of subcarriers of the first resource unit 2 are allocated to the second resource unit 4. The first subcarrier in the yth group of subcarriers of the first resource unit 3 is allocated to the second resource unit 5, and the second and third subcarriers in the yth group of subcarriers of the first resource unit 3 are allocated to the second resource unit 6. The first subcarrier in the yth group of subcarriers of the first resource unit 4 is allocated to the second resource unit 7, and the second and third subcarriers in the yth group of subcarriers of the first resource unit 4 are allocated to the second resource unit 8.

[0174] For the 35th group of subcarriers of each first resource unit: the first subcarrier in the 35th group of subcarriers of first resource unit 1 is allocated to second resource unit 1, and the second subcarrier in the 35th group of subcarriers of first resource unit 1 is allocated to second resource unit 2. The first subcarrier in the 35th group of subcarriers of first resource unit 2 is allocated to second resource unit 3, and the second subcarrier in the 35th group of subcarriers of first resource unit 2 is allocated to second resource unit 4. The first subcarrier in the 35th group of subcarriers of first resource unit 3 is allocated to second resource unit 5, and the second subcarrier in the 35th group of subcarriers of first resource unit 3 is allocated to second resource unit 6. The first subcarrier in the 35th group of subcarriers of first resource unit 4 is allocated to second resource unit 7, and the second subcarrier in the 35th group of subcarriers of first resource unit 4 is allocated to second resource unit 8.

[0175] Optionally, 40 MHz may include second resource units 1 to 8 shown in the first possible design. Alternatively, 40 MHz may include second resource units 1 to 8 shown in the second possible design.

[0176] Based on the above description of the second resource unit, optionally, the third resource unit can also be determined based on the above second resource unit.

[0177] The subcarriers included in the second resource unit are the same as the subcarriers included in the two third resource units. The third resource unit may include the odd-numbered subcarriers in the second resource unit (such as the 1st, 3rd, 5th, 7th, ..., 49th, 51st subcarriers); or, the third resource unit includes the even-numbered subcarriers in the second resource unit (such as the 2nd, 4th, 6th, 8th, ..., 50th, 52nd subcarriers). The third resource unit may also be called a 26-tone DRU.

[0178] For example, taking the second resource units as the above-mentioned second resource units 1 to 8 as an example, 16 third resource units can be determined based on the second resource units 1 to 8, that is, third resource units 1 to 16 can be determined. Specifically, third resource unit 1 can be determined based on the odd-numbered subcarriers in second resource unit 1, and third resource unit 2 can be determined based on the even-numbered subcarriers in second resource unit 1. Third resource unit 3 can be determined based on the odd-numbered subcarriers in second resource unit 2, and third resource unit 4 can be determined based on the even-numbered subcarriers in second resource unit 2. Third resource unit 5 can be determined based on the odd-numbered subcarriers in second resource unit 3, and third resource unit 6 can be determined based on the even-numbered subcarriers in second resource unit 3. Third resource unit 7 can be determined based on the odd-numbered subcarriers in second resource unit 4, and third resource unit 8 can be determined based on the even-numbered subcarriers in second resource unit 4. Third resource unit 9 can be determined based on the odd-numbered subcarriers in second resource unit 5, and third resource unit 10 can be determined based on the even-numbered subcarriers in second resource unit 5. A third resource unit 11 is determined based on the odd-numbered subcarriers in the second resource unit 6, and a third resource unit 12 is determined based on the even-numbered subcarriers in the second resource unit 6. A third resource unit 13 is determined based on the odd-numbered subcarriers in the second resource unit 7, and a third resource unit 14 is determined based on the even-numbered subcarriers in the second resource unit 7. A third resource unit 15 is determined based on the odd-numbered subcarriers in the second resource unit 8, and a third resource unit 16 is determined based on the even-numbered subcarriers in the second resource unit 8.

[0179] The indexes of the subcarriers included in the third resource unit 1 are: -244, -230, -205, -192, -178, -153, -140, -126, -101, -88, -74, -48, -34, -19, 22, 36, 51, 78, 92, 107, 134, 148, 163, 190, 204, 219; or

[0180] The subcarrier indices included in the third resource unit 3 are: -243, -229, -216, -191, -177, -164, -139, -125, -112, -87, -73, -60, -33, -18, 10, 37, 52, 66, 93, 108, 122, 149, 164, 178, 205, 220; or

[0181] The indexes of the subcarriers included in the third resource unit 5 are: -241, -227, -202, -189, -175, -150, -137, -123, -98, -85, -71, -45, -31, -16, 25, 39, 54, 81, 95, 110, 137, 151, 166, 193, 207, 222; or

[0182] The subcarrier indices included in the third resource unit 7 are: -240, -226, -213, -188, -174, -161, -136, -122, -109, -84, -70, -57, -30, -15, 13, 40, 55, 69, 96, 111, 125, 152, 167, 181, 208, 223; or

[0183] The subcarrier indices included in the third resource unit 9 are: -238, -224, -199, -186, -172, -147, -134, -120, -95, -82, -68, -42, -28, -13, 28, 42, 57, 84, 98, 113, 140, 154, 169, 196, 210, 225; or

[0184] The subcarrier indexes included in the third resource unit 11 are: -237, -223, -210, -185, -171, -158, -133, -119, -106, -81, -67, -54, -27, -12, 16, 43, 58, 72, 99, 114, 128, 155, 170, 184, 211, 226; or

[0185] The subcarrier indexes included in the third resource unit 13 are: -235, -221, -196, -183, -169, -144, -131, -117, -92, -79, -65, -39, -25, -10, 31, 45, 60, 87, 101, 116, 143, 157, 172, 199, 213, 228; or

[0186] The subcarrier indexes included in the third resource unit 15 are: -234, -220, -207, -182, -168, -155, -130, -116, -103, -78, -64, -51, -24, -9, 19, 46, 61, 75, 102, 117, 131, 158, 173, 187, 214, 229; or

[0187] The subcarrier indexes included in the third resource unit 2 are: -231, -218, -204, -179, -166, -152, -127, -114, -100, -75, -62, -47, -20, 8, 23, 50, 64, 79, 106, 120, 135, 162, 176, 191, 218, 232; or

[0188] The indexes of the subcarriers included in the third resource unit 4 are: -242, -217, -203, -190, -165, -151, -138, -113, -99, -86, -61, -46, -32, 9, 24, 38, 65, 80, 94, 121, 136, 150, 177, 192, 206, 233; or

[0189] The subcarrier indices included in the third resource unit 6 are: -228, -215, -201, -176, -163, -149, -124, -111, -97, -72, -59, -44, -17, 11, 26, 53, 67, 82, 109, 123, 138, 165, 179, 194, 221, 235; or

[0190] The subcarrier indices included in the third resource unit 8 are: -239, -214, -200, -187, -162, -148, -135, -110, -96, -83, -58, -43, -29, 12, 27, 41, 68, 83, 97, 124, 139, 153, 180, 195, 209, 236; or

[0191] The subcarrier indexes included in the third resource unit 10 are: -225, -212, -198, -173, -160, -146, -121, -108, -94, -69, -56, -41, -14, 14, 29, 56, 70, 85, 112, 126, 141, 168, 182, 197, 224, 238; or

[0192] The subcarrier indexes included in the third resource unit 12 are: -236, -211, -197, -184, -159, -145, -132, -107, -93, -80, -55, -40, -26, 15, 30, 44, 71, 86, 100, 127, 142, 156, 183, 198, 212, 239; or

[0193] The subcarrier indexes included in the third resource unit 14 are: -222, -209, -195, -170, -157, -143, -118, -105, -91, -66, -53, -38, -11, 17, 32, 59, 73, 88, 115, 129, 144, 171, 185, 200, 227, 241; or

[0194] The indexes of the subcarriers included in the third resource unit 16 are: -233, -208, -194, -181, -156, -142, -129, -104, -90, -77, -52, -37, -23, 18, 33, 47, 74, 89, 103, 130, 145, 159, 186, 201, 215, and 242.

[0195] Optionally, 40 MHz may include the third resource unit 1 to the third resource unit 16 .

[0196] Optionally, in addition to the above-mentioned 16 third resource units (also referred to as 16 26-tone DRUs), 40MHz may also include another 2 26-tone DRUs (or described as the 17th 26-tone DRU and the 18th 26-tone DRU). The 17th 26-tone DRU and the 18th 26-tone DRU may include 52 subcarriers corresponding to the subcarriers of 40MHz except for the subcarriers corresponding to the above-mentioned 16 third resource units.

[0197] For example, the subcarrier indexes included in the 17th 26-tone DRU may be: -232, -206, -180, -154, -128, -50, -36, -22, -8, 6, 20, 34, 48, 62, 76, 90, 104, 118, 132, 146, 160, 174, 188, 202, 216, 230. The subcarrier indexes included in the 18th 26-tone DRU may be: -219, -193, -167, -141, -115, -49, -35, -21, -7, 7, 21, 35, 49, 63, 77, 91, 105, 119, 133, 147, 161, 175, 189, 203, 217, 231.

[0198] Based on the first resource unit shown in FIG. 6 to FIG. 7 , optionally, a fourth resource unit may also be determined based on the first resource unit.

[0199] The subcarriers included in the first resource unit are a subset of the subcarriers included in the fourth resource unit, and the fourth resource unit includes two first resource units, one 26-tone DRU, and four single subcarriers. The fourth resource unit can also be called a 242-tone DRU.

[0200] The 26-tone DRU included in the fourth resource unit is a 26-tone DRU not included in the second resource unit, or is described as a 26-tone DRU not included in the third resource unit, or is described as a 26-tone DRU between the 17th 26-tone DRU and the 18th 26-tone DRU.

[0201] Exemplarily, the fourth resource unit 1 may include the first first resource unit (such as the first resource unit 1 described above), the third first resource unit (such as the first resource unit 3 described above), a 26-tone DRU, and four single subcarriers. The fourth resource unit 2 may include the second first resource unit (such as the first resource unit 2 described above), the fourth first resource unit (such as the first resource unit 4 described above), a 26-tone DRU, and four single subcarriers.

[0202] Among them, the indexes of the subcarriers included in the fourth resource unit 1 are: -244, -243, -242, -238, -237, -236, -232, -231, -230, -229, -225, -224, -223, -218, -217, -216, -212, -211, -210, -206, -205, -204, -203, -199, -198, -197, -192, -191, -190, -186, -185, -184, -180, -179, -178, -177, -173, -172, -171, -166, -165, -164, -160, -159, -158, -15 4, -153, -152, -151, -147, -146, -145, -140, -139, -138, -134, -133, -132, -128, -127, -126, -125, -121, -120, -119, -114, -113, -112, -108, -107, -10 6, -102, -101, -100, -99, -95, -94, -93, -88, -87, -86, -82, -81, -80, -76, -75, -74, -73, -69, -68, -67, -62, -61, -60, -56, -55, -54, -50, -48, -47, -46, -42, -41, -40, -36, -34, -33, -32, -28, -27, -26, -22, -20, -19, -18, -14, -13, -12, -8, -6, -5, -3, 3, 6, 8, 9, 10, 14, 15, 16, 20, 22, 23, 24, 28, 29, 30, 34, 36, 37, 38, 42, 43, 44, 48, 50, 51, 52, 56, 57, 58, 62, 64, 65, 66, 70, 71, 72, 76, 78, 79, 80, 84, 85, 86, 90, 92, 93, 94, 98, 99, 100, 104, 106, 107, 108, 112, 11 3, 114, 118, 120, 121, 122, 126, 127, 128, 132, 134, 135, 136, 140, 141, 142, 146, 148, 149, 150, 154, 155, 156, 160, 162, 163, 164, 168, 169, 170, 174, 176 、177、178、182、183、184、188、190、191、192、196、197、198、202、204、205、206、210、211、212、216、218、219、220、224、225、226、230、232、233、234、238、239、240。、

[0203] The indexes of the subcarriers included in the fourth resource unit 2 are: -241, -240, -239, -235, -234, -233, -228, -227, -226, -222, -221, -220, -219, -215, -214, -213, -209, -208, -207, -202, -201, -200, -196, -195, -194, -193, -189, -188, -187, -183, -182, -181, -176, -175, -174, -170, -169, -168, -167, -163, -162, -161, -157, -156, -155, -150, - 149, -148, -144, -143, -142, -141, -137, -136, -135, -131, -130, -129, -124, -123, -122, -118, -117, -116, -115, -111, -110, -109, -105, -104, -103, - 98, -97, -96, -92, -91, -90, -89, -85, -84, -83, -79, -78, -77, -72, -71, -70, -66, -65, -64, -63, -59, -58, -57, -53, -52, -51, -49, -45, -44, -43, -39, -3 8, -37, -35, -31, -30, -29, -25, -24, -23, -21, -17, -16, -15, -11, -10, -9, -7, -4, 4, 5, 7, 11, 12, 13, 17, 18, 19, 21, 25, 26, 27, 31, 32, 33, 35, 39, 40, 41, 4 5, 46, 47, 49, 53, 54, 55, 59, 60, 61, 63, 67, 68, 69, 73, 74, 75, 77, 81, 82, 83, 87, 88, 89, 91, 95, 96, 97, 101, 102, 103, 105, 109, 110, 111, 115, 116, 117, 118 9, 123, 124, 125, 129, 130, 131, 133, 137, 138, 139, 143, 144, 145, 147, 151, 152, 153, 157, 158, 159, 161, 165, 166, 167, 171, 172, 173, 175, 179, 180, 181 、185、186、187、189、193、194、195、199、200、201、203、207、208、209、213、214、215、217、221、222、223、227、228、229、231、235、236、237、241、242、243、244.

[0204] Optionally, 40 MHz may include the fourth resource unit 1 and the fourth resource unit 2 mentioned above.

[0205] Based on the above description of the first resource unit, optionally, the first resource unit includes 4 discrete pilot subcarriers.

[0206] The four discrete pilot subcarriers of the first resource unit are located in four of the 35 subcarrier groups in the first resource unit. That is, each pilot subcarrier in the first resource unit is one of three consecutive subcarriers. By determining that the pilot subcarrier is one of three consecutive subcarriers, a combining gain of 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.

[0207] Optionally, from the above description of the first resource unit, it can be seen that each first resource unit contains 35 groups of consecutive subcarriers. For the four first resource units in 40MHz, the nth group of subcarriers is continuous, that is, the nth group of subcarriers of the first resource unit 1, the nth group of subcarriers of the first resource unit 2, the nth group of subcarriers of the first resource unit 3, and the nth group of subcarriers of the first resource unit 4 are 12 consecutive subcarriers. These 12 consecutive subcarriers are called a block, and there are 35 blocks in total. 16 blocks can be selected from blocks 1-17 and 20-35, each with 1 pilot subcarrier set, for a total of 16 pilot subcarriers. Since blocks 18 and 19 are close to the DC subcarrier and are easily affected by carrier leakage, no pilot subcarrier is set. These 16 pilot subcarriers can be allocated to the four first resource units, and each first resource unit includes 4 pilot subcarriers.

[0208] Among them, by setting a pilot subcarrier in each of the above 16 blocks, it is possible to avoid the pilot subcarriers of the same / different first resource units being too close to each other, thereby avoiding narrowband interference contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0209] Optionally, the four discrete pilot subcarriers of the first resource unit are the second subcarriers in each of the four groups of subcarriers. This ensures that the pilot subcarrier of the first resource unit is located between three consecutive subcarriers, which helps the pilot subcarriers obtain a smooth gain. It also ensures that the sequence numbers of the four pilot subcarriers in the two second resource units determined based on the first resource unit are two odd numbers and two even numbers, thereby ensuring that the two third resource units determined based on the second resource unit can be allocated two pilot subcarriers.

[0210] In a first possible design, the four discrete pilot subcarriers of the first resource unit are respectively located in four groups of subcarriers among the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, 30th, 32nd, and 34th groups of subcarriers in the 35 groups of subcarriers.

[0211] Exemplarily, the four discrete pilot subcarriers of the first resource unit are the four discrete second subcarriers in the 2nd, 10th, 20th, and 28th groups of subcarriers among the 35 groups of subcarriers. Alternatively, the four discrete pilot subcarriers of the first resource unit are the four discrete second subcarriers in the 4th, 12th, 22nd, and 30th groups of subcarriers among the 35 groups of subcarriers. Alternatively, the four discrete pilot subcarriers of the first resource unit are the four discrete second subcarriers in the 6th, 14th, 24th, and 32nd groups of subcarriers among the 35 groups of subcarriers. Alternatively, the four discrete pilot subcarriers of the first resource unit are the four discrete second subcarriers in the 8th, 16th, 26th, and 34th groups of subcarriers among the 35 groups of subcarriers.

[0212] For example, taking the pilot subcarrier as the second subcarrier as an example, the indexes of the four discrete pilot subcarriers of the first resource unit are: -230, -126, 23, 135; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -201, -97, 54, 166; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -172, -68, 85, 197; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -143, -38, 116, 228.

[0213] In the above example, the pilot subcarriers can be distributed more evenly, preventing the pilot subcarriers in the first resource unit from being too close together. This can also prevent narrowband interference from contaminating too many pilot subcarriers, which could lead to inaccurate phase offset estimation. At the same time, the pilot subcarriers can be kept away from the guard subcarriers and DC subcarriers.

[0214] In a second possible design, the four discrete pilot subcarriers of the first resource unit are respectively located in four groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st, and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0215] Exemplarily, the 4 discrete pilot subcarriers of the first resource unit are the 4 discrete second subcarriers in the 1st, 9th, 19th and 27th groups of subcarriers among the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the first resource unit are the 4 discrete second subcarriers in the 3rd, 11th, 21st and 29th groups of subcarriers among the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the first resource unit are the 4 discrete second subcarriers in the 5th, 13th, 23rd and 31st groups of subcarriers among the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the first resource unit are the 4 discrete second subcarriers in the 7th, 15th, 25th and 33rd groups of subcarriers among the 35 groups of subcarriers.

[0216] For example, taking the pilot subcarrier as the second subcarrier as an example, the indexes of the four discrete pilot subcarriers of the first resource unit are: -234, -130, 18, 130; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -211, -107, 43, 155; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -188, -84, 68, 180; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -165, -61, 93, 205.

[0217] For another example, taking the pilot subcarrier as the second subcarrier, the indexes of the four discrete pilot subcarriers of the first resource unit are: -234, -130, 18, 130; the indexes of the four discrete pilot subcarriers of the first resource unit are: -217, -113, 37, 149; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -188, -84, 68, 180; or, the indexes of the four discrete pilot subcarriers of the first resource unit are: -159, -55, 99, 211.

[0218] In the above example, the pilot subcarriers can be distributed more evenly, preventing the pilot subcarriers in the first resource unit from being too close together. This can also prevent narrowband interference from contaminating too many pilot subcarriers, which could lead to inaccurate phase offset estimation. At the same time, the pilot subcarriers can be kept away from the guard subcarriers and DC subcarriers.

[0219] Based on the above design of the pilot subcarriers of the first resource unit, optionally, the pilot subcarriers of the second resource unit may be determined with reference to the above method of determining the pilot subcarriers of the first resource unit.

[0220] The second resource unit includes 4 discrete pilot subcarriers, and the 4 discrete pilot subcarriers of the second resource unit are 4 discrete subcarriers in 17 groups of consecutive subcarriers included in the second resource unit; the 17 groups of consecutive subcarriers include two consecutive subcarriers in the yth group of subcarriers; or, the 17 groups of consecutive subcarriers include two consecutive subcarriers in the xth group of subcarriers.

[0221] Among them, when the second subcarrier and the third subcarrier in the second resource unit are continuous, the 4 discrete pilot subcarriers of the second resource unit are 4 discrete subcarriers among the 17 second subcarriers and 17 third subcarriers corresponding to the second resource unit. Alternatively, when the first subcarrier and the second subcarrier in the second resource unit are continuous, the 4 discrete pilot subcarriers of the second resource unit are 4 discrete subcarriers among the 17 first subcarriers and 17 second subcarriers corresponding to the second resource unit. That is, each pilot subcarrier in the second resource unit is one of two continuous subcarriers. By determining the pilot subcarrier as one of two continuous 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 phase deviation estimation accuracy and reducing the packet error rate.

[0222] Optionally, from the above description of the second resource units, it can be seen that each of the 8 second resource units includes 17 groups of consecutive subcarriers (ie, paired subcarriers).

[0223] For the second resource units 1 / 3 / 5 / 7, the i-th group of consecutive subcarriers (i=1, 2,…, 17) of the four second resource units are located in the same group of subcarriers among the above 35 groups of subcarriers. The 17 groups of consecutive subcarriers are located in the y-th group of subcarriers among the above 35 groups of subcarriers, that is, in the 2nd, 4th, 6th,…, 32nd, 34th groups of subcarriers among the above 35 groups of subcarriers. One pilot subcarrier can be set in each of the 2nd, 4th, 6th,…, 14th, 16th, 20th, 22nd,…, 32nd, 34th groups of subcarriers, for a total of 16 pilot subcarriers. Since the 18th group of subcarriers is close to the DC subcarrier and is easily affected by carrier leakage, no pilot subcarrier is set. These 16 pilot subcarriers can be allocated to the four second resource units, and each second resource unit includes 4 pilot subcarriers. By setting a pilot subcarrier in each of the 16 groups of subcarriers, it is possible to avoid the pilot subcarriers of the same / different second resource units being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase offset estimation.

[0224] For the second resource units 2 / 4 / 6 / 8, the i-th group of consecutive subcarriers (i=1, 2,…, 17) of the four second resource units are located in the same group of subcarriers among the above 35 groups of subcarriers. The 17 groups of consecutive subcarriers are located in the x-th group of subcarriers among the above 35 groups of subcarriers, that is, in the 1st, 3rd, 5th,…, 31st, 33rd groups of subcarriers among the above 35 groups of subcarriers. One pilot subcarrier can be set in each of the 1st, 3rd, 5th,…, 15th, 17th, 21st, 23rd,…, 31st, 33rd groups of subcarriers, for a total of 16 pilot subcarriers. Since the 19th group of subcarriers is close to the DC subcarrier and is easily affected by carrier leakage, no pilot subcarrier is set. These 16 pilot subcarriers can be allocated to the four second resource units, and each second resource unit includes 4 pilot subcarriers. By setting a pilot subcarrier in each of the 16 groups of subcarriers, it is possible to avoid the pilot subcarriers of the same / different second resource units being too close to each other, thereby preventing narrowband interference from contaminating too many pilot subcarriers and causing inaccurate phase offset estimation.

[0225] Optionally, since one first resource unit corresponds to two second resource units, the four pilot subcarriers of the first resource unit may be the same as the pilot subcarrier of one of the corresponding second resource units.

[0226] Among them, since the first resource unit 1 corresponds to the second resource unit 1 and the second resource unit 2, the first resource unit 2 corresponds to the second resource unit 3 and the second resource unit 4, the first resource unit 3 corresponds to the second resource unit 5 and the second resource unit 6, and the first resource unit 4 corresponds to the second resource unit 7 and the second resource unit 8. The four pilot subcarriers of the first resource units 1 / 2 / 3 / 4 can be respectively the same as the pilot subcarriers of the second resource units 1 / 3 / 5 / 7, or the four pilot subcarriers of the first resource units 1 / 2 / 3 / 4 can be respectively the same as the pilot subcarriers of the second resource units 2 / 4 / 6 / 8.

[0227] Optionally, since the pilot subcarrier of the first resource unit can be the same as the pilot subcarrier of the second resource unit, the four discrete pilot subcarriers of the second resource unit can be the second subcarrier in each of the four groups of subcarriers. This ensures that the pilot subcarrier of the first resource unit is located in the middle of three consecutive subcarriers, which is beneficial for its pilot subcarrier to obtain a smooth gain. It can also ensure that the sequence numbers of the four pilot subcarriers in the two second resource units determined based on the first resource unit are two odd numbers and two even numbers, thereby ensuring that the two third resource units determined based on the second resource unit can be allocated two pilot subcarriers.

[0228] Optionally, in order to ensure that the sequence numbers of the pilot subcarriers in the second resource unit have two odd numbers and two even numbers, the pilot subcarriers may not be set in the 17th group of subcarriers.

[0229] In a first possible design, the four discrete pilot subcarriers of the second resource unit are respectively located in four groups of subcarriers among the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, 30th, 32nd, and 34th groups of subcarriers in the 35 groups of subcarriers.

[0230] Exemplarily, the four discrete pilot subcarriers of the second resource unit 1 are the four discrete second subcarriers in the 2nd, 10th, 20th, and 28th groups of subcarriers among the 35 groups of subcarriers. The four discrete pilot subcarriers of the second resource unit 3 are the four discrete second subcarriers in the 4th, 12th, 22nd, and 30th groups of subcarriers among the 35 groups of subcarriers. The four discrete pilot subcarriers of the second resource unit 5 are the four discrete second subcarriers in the 6th, 14th, 24th, and 32nd groups of subcarriers among the 35 groups of subcarriers. The four discrete pilot subcarriers of the second resource unit 7 are the four discrete second subcarriers in the 8th, 16th, 26th, and 34th groups of subcarriers among the 35 groups of subcarriers.

[0231] For example, taking the pilot subcarrier as the second subcarrier, the indexes of the four discrete pilot subcarriers of the second resource unit 1 are: -230, -126, 23, 135. The indexes of the four discrete pilot subcarriers of the second resource unit 3 are: -201, -97, 54, 166. The indexes of the four discrete pilot subcarriers of the second resource unit 5 are: -172, -68, 85, 197. The indexes of the four discrete pilot subcarriers of the second resource unit 7 are: -143, -38, 116, 228.

[0232] In the above example, the pilot subcarriers can be distributed more evenly, preventing the pilot subcarriers of the second resource unit from being too close together. This can also prevent narrowband interference from contaminating too many pilot subcarriers, which could lead to inaccurate phase offset estimation. At the same time, the pilot subcarriers can be kept away from the guard subcarriers and DC subcarriers.

[0233] In a second possible design, the four discrete pilot subcarriers of the second resource unit are respectively located in four groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st, and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0234] Exemplarily, the four discrete pilot subcarriers of the second resource unit 8 are the four discrete second subcarriers in the 1st, 9th, 19th, and 27th groups of subcarriers among the 35 groups of subcarriers. The four discrete pilot subcarriers of the second resource unit 6 are the four discrete second subcarriers in the 3rd, 11th, 21st, and 29th groups of subcarriers among the 35 groups of subcarriers. The four discrete pilot subcarriers of the second resource unit 4 are the four discrete second subcarriers in the 5th, 13th, 23rd, and 31st groups of subcarriers among the 35 groups of subcarriers. The four discrete pilot subcarriers of the second resource unit 2 are the four discrete second subcarriers in the 7th, 15th, 25th, and 33rd groups of subcarriers among the 35 groups of subcarriers.

[0235] For example, taking the pilot subcarrier as the second subcarrier, the indexes of the four discrete pilot subcarriers of the second resource unit 8 are: -234, -130, 18, 130. The indexes of the four discrete pilot subcarriers of the second resource unit 6 are: -211, -107, 43, 155. The indexes of the four discrete pilot subcarriers of the second resource unit 4 are: -188, -84, 68, 180. The indexes of the four discrete pilot subcarriers of the second resource unit 2 are: -165, -61, 93, 205.

[0236] In another example, the four scattered pilot subcarriers of the second resource unit 8 are the four scattered second subcarriers in the 1st, 9th, 19th, and 27th groups of subcarriers among the 35 groups of subcarriers. The four scattered pilot subcarriers of the second resource unit 2 are the four scattered second subcarriers in the 3rd, 11th, 21st, and 29th groups of subcarriers among the 35 groups of subcarriers. The four scattered pilot subcarriers of the second resource unit 4 are the four scattered second subcarriers in the 5th, 13th, 23rd, and 31st groups of subcarriers among the 35 groups of subcarriers. The four scattered pilot subcarriers of the second resource unit 6 are the four scattered second subcarriers in the 7th, 15th, 25th, and 33rd groups of subcarriers among the 35 groups of subcarriers.

[0237] For example, taking the pilot subcarrier as the second subcarrier, the indexes of the four discrete pilot subcarriers of the second resource unit 8 are: -234, -130, 18, 130; the indexes of the four discrete pilot subcarriers of the second resource unit 2 are: -217, -113, 37, 149. The indexes of the four discrete pilot subcarriers of the second resource unit 4 are: -188, -84, 68, 180. The indexes of the four discrete pilot subcarriers of the second resource unit 6 are: -159, -55, 99, 211.

[0238] In both examples, the pilot subcarriers can be distributed more evenly, preventing the pilot subcarriers in the second resource unit from being too close together. This prevents narrowband interference from contaminating too many pilot subcarriers, which could lead to inaccurate phase offset estimation. Furthermore, the pilot subcarriers can be kept away from guard subcarriers and DC subcarriers.

[0239] Optionally, the two pilot subcarriers in the second resource unit are the odd-numbered subcarriers of the second resource unit, and the other two pilot subcarriers are the even-numbered subcarriers of the second resource unit. Thus, when two third resource units are determined based on the second resource unit, it is ensured that each third resource unit can include two pilot subcarriers. That is, the pilot subcarriers included in the second resource unit are the same as the pilot subcarriers included in the two third resource units, the pilot subcarriers included in the third resource unit are the two pilot subcarriers with odd sorting numbers among the subcarriers of the second resource unit, and the third resource unit is determined based on the odd-numbered subcarriers in the second resource unit; or, the pilot subcarriers included in the third resource unit are the two pilot subcarriers with even sorting numbers among the subcarriers of the second resource unit, and the third resource unit is determined based on the even-numbered subcarriers in the second resource unit.

[0240] In the first example, when the pilot subcarrier of the second resource unit 1 is located in the 2nd, 10th, 20th, and 28th groups of subcarriers, the index of the pilot subcarrier can be {-230, -126, 23, 135}, and its serial number in the second resource unit 1 is {3, 15, 30, 42}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-230, -126} and {23, 135} respectively. When the pilot subcarrier of the second resource unit 3 is located in the 4th, 12th, 22nd, and 30th groups of subcarriers, the index of the pilot subcarrier can be {-201, -97, 54, 166}, and its serial number in the second resource unit 3 is {6, 18, 33, 45}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-201, -97} and {54, 166} respectively. When the pilot subcarrier of the second resource unit 5 is located in the 6th, 14th, 24th, and 32nd groups of subcarriers, the index of the pilot subcarrier can be {-172, -68, 85, 197}, and its serial number in the second resource unit 5 is {9, 21, 36, 48}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-172, -68} and {85, 197} respectively. When the pilot subcarrier of the second resource unit 7 is located in the 8th, 16th, 26th, and 34th groups of subcarriers, the index of the pilot subcarrier can be {-143, -38, 116, 228}, and its serial number in the second resource unit 7 is {12, 24, 39, 51}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-143, -38} and {116, 228} respectively.

[0241] In the second example, when the pilot subcarrier of the second resource unit 8 is located in the 1st, 9th, 19th, and 27th groups of subcarriers, the index of the pilot subcarrier can be {-234, -130, 18, 130}, and its serial number in the second resource unit 8 is {1, 13, 28, 40}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-234, -130} and {18, 130} respectively. When the pilot subcarrier of the second resource unit 6 is located in the 3rd, 11th, 21st, and 29th groups of subcarriers, the index of the pilot subcarrier can be {-211, -107, 43, 155}, and its serial number in the second resource unit 6 is {4, 16, 31, 43}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-211, -107} and {43, 155} respectively. When the pilot subcarrier of the second resource unit 4 is located in the 5th, 13th, 23rd, and 31st groups of subcarriers, the index of the pilot subcarrier can be {-188, -84, 68, 180}, and its serial number in the second resource unit 4 is {7, 19, 34, 46}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-188, -84} and {68, 180} respectively. When the pilot subcarrier of the second resource unit 2 is located in the 7th, 15th, 25th, and 33rd groups of subcarriers, the index of the pilot subcarrier can be {-165, -61, 93, 205}, and its serial number in the second resource unit 2 is {10, 22, 37, 49}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-165, -61} and {93, 205} respectively.

[0242] In the third example, when the pilot subcarrier of the second resource unit 8 is located in the 1st, 9th, 19th, and 27th groups of subcarriers, the index of the pilot subcarrier can be {-234, -130, 18, 130}, and its serial number in the second resource unit 8 is {1, 13, 28, 40}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-234, -130} and {18, 130} respectively. When the pilot subcarrier of the second resource unit 2 is located in the 3rd, 11th, 21st, and 29th groups of subcarriers, the index of the pilot subcarrier can be {-217, -113, 37, 149}, and its serial number in the second resource unit 2 is {4, 16, 31, 43}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-217, -113} and {37, 149} respectively. When the pilot subcarrier of the second resource unit 4 is located in the 5th, 13th, 23rd, and 31st groups of subcarriers, the index of the pilot subcarrier can be {-188, -84, 68, 180}, and its serial number in the second resource unit 4 is {7, 19, 34, 46}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-188, -84} and {68, 180} respectively. When the pilot subcarrier of the second resource unit 6 is located in the 7th, 15th, 25th, and 33rd groups of subcarriers, the index of the pilot subcarrier can be {-159, -55, 99, 211}, and its serial number in the second resource unit 6 is {10, 22, 37, 49}, and the indexes of the pilot subcarriers of the corresponding two third resource units can be {-159, -55} and {99, 211} respectively.

[0243] Optionally, in addition to the aforementioned 16 third resource units (third resource unit 1 to third resource unit 16), the 40MHz may also include the aforementioned 17th 26-tone DRU and 18th 26-tone DRU, and the 17th 26-tone DRU may also include 2 discrete pilot subcarriers. The 18th 26-tone DRU may also include 2 discrete pilot subcarriers.

[0244] The two pilot subcarriers in the 17th or 18th 26-tone DRU are each one of two consecutive subcarriers, and the two pilot subcarriers are discrete. By determining that the pilot subcarrier is one of two consecutive subcarriers, the combining gain of the consecutive subcarriers can be obtained at the pilot subcarrier. During the channel estimation process, the channel estimation can be made more accurate, thereby improving the accuracy of phase deviation estimation and reducing the packet error rate.

[0245] Optionally, a subcarrier away from the DC subcarrier and the protection subcarrier in the 17th 26-tone DRU or the 18th 26-tone DRU may be determined as a pilot subcarrier.

[0246] Optionally, two subcarriers that are far enough apart in the 17th 26-tone DRU or the 18th 26-tone DRU can be used as pilot subcarriers to make the pilot subcarrier distribution more even, thereby avoiding the pilot subcarriers of the 17th 26-tone DRU or the 18th 26-tone DRU being too close to each other, thereby avoiding narrowband interference contaminating too many pilot subcarriers and causing inaccurate phase deviation estimation.

[0247] Optionally, two subcarriers in the 17th 26-tone DRU or the 18th 26-tone DRU that meet the following conditions can also 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 16 third resource units is the largest.

[0248] Optionally, the pilot subcarrier of the fourth resource unit may also be determined according to the pilot subcarrier of the first resource unit.

[0249] The pilot subcarriers included in the fourth resource unit can be the eight pilot subcarriers included in the corresponding two first resource units. This can make the pilot subcarriers more evenly distributed, avoid the pilot subcarriers of the fourth resource unit being too close together, and further avoid narrowband interference contaminating too many pilot subcarriers, which can cause inaccurate phase offset estimation.

[0250] Exemplarily, taking the fourth resource unit 1 including the first resource unit 1 and the first resource unit 3 as an example, the pilot subcarriers included in the fourth resource unit 1 can be the 4 pilot subcarriers included in the first resource unit 1 and the 4 pilot subcarriers included in the first resource unit 3.

[0251] Exemplarily, taking the example that the fourth resource unit 2 includes the first resource unit 2 and the first resource unit 4, the pilot subcarriers included in the fourth resource unit 2 can be the 4 pilot subcarriers included in the first resource unit 2 and the 4 pilot subcarriers included in the first resource unit 4.

[0252] Different from FIG. 6 above, the embodiment of the present application further provides another communication method, as shown in FIG. 9 , which may include:

[0253] Step 901: A first communication device transmits an OFDM symbol through a second resource unit.

[0254] The second resource unit includes one subcarrier in the xth group of subcarriers among the 35 groups of subcarriers, two consecutive subcarriers in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers. Alternatively, the second resource unit includes two consecutive subcarriers in the xth group of subcarriers among the 35 groups of subcarriers, one subcarrier in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers; x = 1, 3, 5, ..., 31, 33; y = 2, 4, 6, ..., 32, 34. Each group of subcarriers includes a first subcarrier, a second subcarrier, and a third subcarrier. This second resource unit may also be called a 52-tone DRU.

[0255] Based on the above description, the two second resource units may include 35 groups of subcarriers, and the 35 groups of subcarriers can also be considered as 35 groups of subcarriers in the first resource unit. The description of the 35 groups of subcarriers can refer to the description of the 35 groups of subcarriers in Figure 6 above, and will not be repeated here.

[0256] Optionally, when the transmission bandwidth is 40 MHz, 40 MHz may include four "35 groups of subcarriers", namely, the first 35 groups of subcarriers (or may also be described as the 35 groups of subcarriers in the first resource unit 1), the second 35 groups of subcarriers (or may also be described as the 35 groups of subcarriers in the first resource unit 2), the third 35 groups of subcarriers (or may also be described as the 35 groups of subcarriers in the first resource unit 3), and the fourth 35 groups of subcarriers (or may also be described as the 35 groups of subcarriers in the first resource unit 4). Based on the four "35 groups of subcarriers", eight second resource units may be determined.

[0257] Optionally, the nth group of subcarriers in the four "35 groups of subcarriers" are continuous. n = 1, 2, ..., 35.

[0258] For example, the nth group of subcarriers of the first 35 groups of subcarriers 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 second 35 groups of subcarriers 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 third 35 groups of subcarriers includes the first subcarrier 3-n-1, the second subcarrier 3-n-2, and the third subcarrier 3-n-3; the nth group of subcarriers of the fourth 35 groups of subcarriers includes the first subcarrier 4-n-1, the second subcarrier 4-n-2, and the third subcarrier 4-n-3. Taking subcarrier 4-n-2 and the third subcarrier 4-n-3 as an example, the nth group of subcarriers of these four "35 groups of subcarriers" can be arranged in the frequency domain order as follows: continuous (first subcarrier 1-n-1, second subcarrier 1-n-2, third subcarrier 1-n-3, first subcarrier 2-n-1, second subcarrier 2-n-2, third subcarrier 2-n-3, first subcarrier 3-n-1, second subcarrier 3-n-2, third subcarrier 3-n-3, first subcarrier 4-n-1, second subcarrier 4-n-2, third subcarrier 4-n-3).

[0259] In a first possible design, the second resource unit includes the first subcarrier in the xth group of subcarriers, the first subcarrier and the second subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or, the second resource unit includes the second subcarrier and the third subcarrier in the xth group of subcarriers, the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

[0260] Exemplarily, eight second resource units may be determined according to the four “35 groups of subcarriers” mentioned above, as shown below:

[0261] As shown in Figure 8, for the xth subcarrier group of each "35 subcarrier groups" (i.e., the 1st, 3rd, 5th, ..., 31st, and 33rd subcarrier groups): the first subcarrier in the xth subcarrier group of the first 35 subcarrier groups is allocated to the second resource element 1, and the second and third subcarriers in the xth subcarrier group of the first 35 subcarrier groups are allocated to the second resource element 2. The first subcarrier in the xth subcarrier group of the second 35 subcarrier groups is allocated to the second resource element 3, and the second and third subcarriers in the xth subcarrier group of the second 35 subcarrier groups are allocated to the second resource element 4. The first subcarrier in the xth subcarrier group of the third 35 subcarrier groups is allocated to the second resource element 5, and the second and third subcarriers in the xth subcarrier group of the third 35 subcarrier groups are allocated to the second resource element 6. The first subcarrier in the xth subcarrier group of the fourth 35 subcarrier groups is allocated to the second resource element 7, and the second and third subcarriers in the xth subcarrier group of the fourth 35 subcarrier groups are allocated to the second resource element 8.

[0262] As shown in FIG8 , for the yth subcarrier group of each of the “35 groups of subcarriers” (i.e., the 2nd, 4th, 6th, …, 32nd, and 34th subcarrier groups): the first and second subcarriers in the yth subcarrier group of the first 35 groups of subcarriers are allocated to the second resource unit 1, and the third subcarrier in the yth subcarrier group of the first 35 groups of subcarriers is allocated to the second resource unit 2. The first and second subcarriers in the yth subcarrier group of the second 35 groups of subcarriers are allocated to the second resource unit 3, and the third subcarrier in the yth subcarrier group of the second 35 groups of subcarriers is allocated to the second resource unit 4. The first and second subcarriers in the yth subcarrier group of the third 35 groups of subcarriers are allocated to the second resource unit 5, and the third subcarrier in the yth subcarrier group of the third 35 groups of subcarriers is allocated to the second resource unit 6. The first and second subcarriers in the yth subcarrier group of the fourth 35 groups of subcarriers are allocated to the second resource unit 7, and the third subcarrier in the yth subcarrier group of the fourth 35 groups of subcarriers is allocated to the second resource unit 8.

[0263] As shown in Figure 8, for the 35th subcarrier group of each "35 groups of subcarriers": the first subcarrier in the 35th subcarrier group of the first 35 groups of subcarriers is allocated to the second resource element 1, and the second subcarrier in the 35th subcarrier group of the first 35 groups of subcarriers is allocated to the second resource element 2. The first subcarrier in the 35th subcarrier group of the second 35 groups of subcarriers is allocated to the second resource element 3, and the second subcarrier in the 35th subcarrier group of the second 35 groups of subcarriers is allocated to the second resource element 4. The first subcarrier in the 35th subcarrier group of the third 35 groups of subcarriers is allocated to the second resource element 5, and the second subcarrier in the 35th subcarrier group of the third 35 groups of subcarriers is allocated to the second resource element 6. The first subcarrier in the 35th subcarrier group of the fourth 35 groups of subcarriers is allocated to the second resource element 7, and the second subcarrier in the 35th subcarrier group of the fourth 35 groups of subcarriers is allocated to the second resource element 8.

[0264] In a second possible design, the second resource unit includes the first subcarrier and the second subcarrier in the xth group of subcarriers, the first subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or, the second resource unit includes the third subcarrier in the xth group of subcarriers, the second subcarrier and the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

[0265] Exemplarily, eight second resource units may be determined according to the four “35 groups of subcarriers” mentioned above, as shown below:

[0266] For the xth subcarrier in each "35 groups of subcarriers" (i.e., the 1st, 3rd, 5th, ..., 31st, and 33rd groups of subcarriers): the first and second subcarriers in the xth subcarrier in the first 35 groups of subcarriers are allocated to the second resource element 1, and the third subcarrier in the xth subcarrier in the first 35 groups of subcarriers are allocated to the second resource element 2. The first and second subcarriers in the xth subcarrier in the second 35 groups of subcarriers are allocated to the second resource element 3, and the third subcarrier in the xth subcarrier in the second 35 groups of subcarriers are allocated to the second resource element 4. The first and second subcarriers in the xth subcarrier in the third 35 groups of subcarriers are allocated to the second resource element 5, and the third subcarrier in the xth subcarrier in the third 35 groups of subcarriers are allocated to the second resource element 6. The first and second subcarriers in the xth subcarrier in the fourth 35 groups of subcarriers are allocated to the second resource element 7, and the third subcarrier in the xth subcarrier in the fourth 35 groups of subcarriers are allocated to the second resource element 8.

[0267] For the yth subcarrier group of each "35 groups of subcarriers" (i.e., the 2nd, 4th, 6th, ..., 32nd, and 34th subcarrier groups): the first subcarrier in the yth subcarrier group of the first 35 groups of subcarriers is allocated to the second resource element 1, and the second and third subcarriers in the yth subcarrier group of the first 35 groups of subcarriers are allocated to the second resource element 2. The first subcarrier in the yth subcarrier group of the second 35 groups of subcarriers is allocated to the second resource element 3, and the second and third subcarriers in the yth subcarrier group of the second 35 groups of subcarriers are allocated to the second resource element 4. The first subcarrier in the yth subcarrier group of the third 35 groups of subcarriers is allocated to the second resource element 5, and the second and third subcarriers in the yth subcarrier group of the third 35 groups of subcarriers are allocated to the second resource element 6. The first subcarrier in the yth subcarrier group of the fourth 35 groups of subcarriers is allocated to the second resource element 7, and the second and third subcarriers in the yth subcarrier group of the fourth 35 groups of subcarriers are allocated to the second resource element 8.

[0268] For the 35th subcarrier group of each "35 groups of subcarriers": the first subcarrier in the 35th subcarrier group of the first 35 groups of subcarriers is allocated to the second resource element 1, and the second subcarrier in the 35th subcarrier group of the first 35 groups of subcarriers is allocated to the second resource element 2. The first subcarrier in the 35th subcarrier group of the second 35 groups of subcarriers is allocated to the second resource element 3, and the second subcarrier in the 35th subcarrier group of the second 35 groups of subcarriers is allocated to the second resource element 4. The first subcarrier in the 35th subcarrier group of the third 35 groups of subcarriers is allocated to the second resource element 5, and the second subcarrier in the 35th subcarrier group of the third 35 groups of subcarriers is allocated to the second resource element 6. The first subcarrier in the 35th subcarrier group of the fourth 35 groups of subcarriers is allocated to the second resource element 7, and the second subcarrier in the 35th subcarrier group of the fourth 35 groups of subcarriers is allocated to the second resource element 8.

[0269] Optionally, 40 MHz may include second resource units 1 to 8 shown in the first possible design. Alternatively, 40 MHz may include second resource units 1 to 8 shown in the second possible design.

[0270] Optionally, for specific examples of indexing the subcarriers included in the above-mentioned second resource unit 1 to the second resource unit 8, reference can be made to the aforementioned examples of indexing the subcarriers included in the second resource unit 1 to the second resource unit 8, which will not be repeated here.

[0271] Optionally, the subcarriers corresponding to the four "35 groups of subcarriers" can be determined based on the following method: 484 subcarriers (i.e., subcarriers indexed as [-244:-3, 3:244]) can be divided into 36 parts of subcarriers, each part of subcarriers can include 13, 14 or 9 subcarriers, for each part of subcarriers including 13 or 14 subcarriers, 3 consecutive subcarriers can be sequentially allocated to the four "35 groups of subcarriers", for a part of subcarriers including 9 subcarriers, the part of subcarriers does not need to be allocated to the four "35 groups of subcarriers", and the remaining subcarriers in each part of subcarriers are not allocated.

[0272] For example, as shown in FIG7 , each of the 1st to 14th and 36th parts of the 36 parts of subcarriers may include 13 subcarriers, each of the 15th to 18th and 20th to 35th parts of subcarriers may include 14 subcarriers, and the 19th part of subcarriers may include 9 subcarriers.

[0273] The first 35 groups of subcarriers may include the 1st, 2nd, and 3rd subcarriers in the 1st-18th and 20th-36th parts of subcarriers.

[0274] The second group of 35 subcarriers may include the 4th, 5th, and 6th subcarriers in the 1st to 18th and 20th to 36th subcarrier parts.

[0275] The third group of 35 subcarriers may include the 7th, 8th, and 9th subcarriers in the 1st to 18th and 20th to 36th parts of subcarriers.

[0276] The fourth group of 35 subcarriers may include subcarriers No. 10, 11, and 12 in the subcarriers No. 1-18, 20-36 parts.

[0277] Optionally, the first communication device transmitting OFDM symbols through the second resource unit can be understood as: sending OFDM symbols through the second resource unit, or receiving OFDM symbols through the second resource unit, without limitation.

[0278] 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.

[0279] It is understandable that some fields of the PPDU (such as the preamble field) may not be transmitted on the second resource unit, but may be transmitted in units of 40 MHz channels.

[0280] Based on the second resource unit shown in Figure 9, optionally, a third resource unit may be determined based on the second resource unit. Detailed descriptions of "determining the third resource unit based on the second resource unit" may be referred to above and will not be repeated here.

[0281] Optionally, 40 MHz may include 16 third resource units. For the description of the 16 third resource units, reference may be made to the aforementioned description of the third resource units and details will not be repeated here.

[0282] Optionally, in addition to the aforementioned 16 third resource units (also referred to as 16 26-tone DRUs), the 40 MHz band may also include two additional 26-tone DRUs (or described as the 17th 26-tone DRU and the 18th 26-tone DRU). The description of the 17th 26-tone DRU and the 18th 26-tone DRU can refer to the aforementioned description and is not repeated here.

[0283] Based on the second resource unit shown in FIG. 9 , optionally, the first resource unit may also be determined based on the second resource unit.

[0284] The subcarriers included in the two second resource units are a subset of the subcarriers included in the first resource unit; the first resource unit includes 35 groups of subcarriers and one single subcarrier. Each group of subcarriers includes a consecutive first subcarrier, a second subcarrier, and a third subcarrier. Alternatively, the first resource unit may include two second resource units and one single subcarrier. This first resource unit may also be referred to as a 106-tone DRU.

[0285] Optionally, when the transmission bandwidth is 40 MHz, 40 MHz may include 4 first resource units, and the n-th groups of subcarriers of the 4 first resource units are continuous, where n=1, 2, ..., 35.

[0286] Exemplarily, first resource unit 1 may include second resource unit 1, second resource unit 2, and a single subcarrier. First resource unit 2 may include second resource unit 3, second resource unit 4, and a single subcarrier. First resource unit 3 may include second resource unit 5, second resource unit 6, and a single subcarrier. First resource unit 4 may include second resource unit 7, second resource unit 8, and a single subcarrier.

[0287] Optionally, 40 MHz may include the first resource unit 1 to the first resource unit 4. The description of the four first resource units may refer to the above description of the first resource unit and will not be repeated here.

[0288] Based on the above description of the first resource unit, optionally, a fourth resource unit may be determined based on the above first resource unit. Detailed descriptions may refer to the above description of "determining the fourth resource unit based on the first resource unit", which will not be repeated here.

[0289] Based on the above description of the second resource unit, optionally, the second resource unit may include 4 discrete pilot subcarriers. For details, please refer to the above description of "the second resource unit includes 4 discrete pilot subcarriers", which will not be repeated here.

[0290] Based on the above description of the pilot subcarriers of the second resource unit, optionally, the two discrete pilot subcarriers included in the third resource unit can also be determined based on the pilot subcarriers of the second resource unit. For details, please refer to the above description of "the third resource unit includes two discrete pilot subcarriers", which is not repeated here.

[0291] Based on the above design of the pilot subcarriers of the second resource unit, optionally, the four discrete pilot subcarriers included in the first resource unit can also be determined with reference to the above method for determining the pilot subcarriers of the second resource unit. For details, please refer to the above description of "the first resource unit includes four discrete pilot subcarriers", which is not repeated here.

[0292] Optionally, the four discrete pilot subcarriers of the first resource unit may be four pilot subcarriers among the eight discrete pilot subcarriers included in the two second resource units corresponding to the first resource unit.

[0293] Optionally, the four scattered pilot subcarriers of the first resource unit are the four pilot subcarriers of one of the two second resource units corresponding to the first resource unit.

[0294] Based on the above description of the pilot subcarriers of the first resource unit, optionally, the eight discrete pilot subcarriers included in the fourth resource unit can also be determined based on the pilot subcarriers of the first resource unit. For details, please refer to the above description of "the fourth resource unit includes eight discrete pilot subcarriers", which is not repeated here.

[0295] Different from FIG. 6 or FIG. 9 , the embodiment of the present application further provides another communication method, as shown in FIG. 10 , which may include:

[0296] Step 1001: A first communication device transmits an OFDM symbol through a third resource unit.

[0297] The two third resource units include one subcarrier in the xth group of subcarriers in the 35 groups of subcarriers, two consecutive subcarriers in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers; or, the two third resource units include two consecutive subcarriers in the xth group of subcarriers in the 35 groups of subcarriers, one subcarrier in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers; x = 1, 3, 5, ..., 31, 33; y = 2, 4, 6, ..., 32, 34; each group of subcarriers includes a consecutive first subcarrier, a second subcarrier, and a third subcarrier. This third resource unit may also be called a 26-tone DRU.

[0298] Based on the above description, the four third resource units may include 35 groups of subcarriers. For the description of the 35 groups of subcarriers, reference may be made to the description of the 35 groups of subcarriers in FIG. 6 or FIG. 9 , and details will not be repeated here.

[0299] Optionally, when the transmission bandwidth is 40 MHz, 40 MHz may include four "35 groups of subcarriers", namely, the first 35 groups of subcarriers (or may also be described as the 35 groups of subcarriers in the first resource unit 1), the second 35 groups of subcarriers (or may also be described as the 35 groups of subcarriers in the first resource unit 2), the third 35 groups of subcarriers (or may also be described as the 35 groups of subcarriers in the first resource unit 3), and the fourth 35 groups of subcarriers (or may also be described as the 35 groups of subcarriers in the first resource unit 4). Based on the four "35 groups of subcarriers", 16 third resource units can be determined, that is, 40 MHz may include the above 16 third resource units.

[0300] In a first possible design, the two third resource units include the first subcarrier in the xth group of subcarriers, the first subcarrier and the second subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or, the two third resource units include the second subcarrier and the third subcarrier in the xth group of subcarriers, the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

[0301] In a second possible design, the two third resource units include the first subcarrier and the second subcarrier in the xth group of subcarriers, the first subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or, the two third resource units include the third subcarrier in the xth group of subcarriers, the second subcarrier and the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

[0302] Based on the above two possible designs, the third resource unit may include the odd-numbered subcarriers in the first subcarrier set arranged in frequency domain order; or, the third resource unit may include the even-numbered subcarriers in the first subcarrier set arranged in frequency domain order.

[0303] The first subcarrier set may include the subcarriers included in the above two third resource units.

[0304] Optionally, for specific examples of indexes of subcarriers included in the above 16 third resource units, reference may be made to the aforementioned examples of indexes of subcarriers included in third resource unit 1 to third resource unit 16, which will not be repeated here.

[0305] Optionally, the first communication device transmitting OFDM symbols through the third resource unit can be understood as: sending OFDM symbols through the third resource unit, or receiving OFDM symbols through the third resource unit, without limitation.

[0306] 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.

[0307] 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 40 MHz channels.

[0308] Based on the third resource unit shown in FIG10 , optionally, the second resource unit may also be determined based on the third resource unit.

[0309] The subcarriers included in the third resource unit are a subset of the subcarriers included in the second resource unit, and the second resource unit includes two third resource units. The second resource unit can also be called a 52-tone DRU.

[0310] For example, second resource unit 1 may include third resource unit 1 and third resource unit 2. Second resource unit 2 may include third resource unit 3 and third resource unit 4. Second resource unit 3 may include third resource unit 5 and third resource unit 6. Second resource unit 4 may include third resource unit 7 and third resource unit 8. Second resource unit 5 may include third resource unit 9 and third resource unit 10. Second resource unit 6 may include third resource unit 11 and third resource unit 12. Second resource unit 7 may include third resource unit 13 and third resource unit 14. Second resource unit 8 may include third resource unit 15 and third resource unit 16.

[0311] Optionally, 40 MHz may include the second resource unit 1 to the second resource unit 8. The description of the eight second resource units may refer to the above description of the second resource unit, and will not be repeated here.

[0312] Based on the above description of the second resource unit, optionally, the first resource unit may also be determined based on the above second resource unit. Specific details may refer to the above description of "determining the first resource unit based on the second resource unit", which will not be repeated here.

[0313] Based on the above description of the first resource unit, optionally, a fourth resource unit may be determined based on the above first resource unit. Detailed descriptions may refer to the above description of "determining the fourth resource unit based on the first resource unit", which will not be repeated here.

[0314] Based on the above description of the third resource unit, optionally, the third resource unit may include 2 discrete pilot subcarriers.

[0315] The four discrete pilot subcarriers of the two third resource units are four discrete subcarriers in 17 groups of consecutive subcarriers; the 17 groups of consecutive subcarriers include two consecutive subcarriers in the yth group of subcarriers; or, the 17 groups of consecutive subcarriers include two consecutive subcarriers in the xth group of subcarriers.

[0316] In a first possible design, the four discrete pilot subcarriers of the two third resource units are respectively located in four groups of subcarriers among the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, 30th, 32nd, and 34th groups of subcarriers in the 35 groups of subcarriers.

[0317] Exemplarily, the 4 discrete pilot subcarriers of the 2 third resource units are the 4 discrete second subcarriers in the 2nd, 10th, 20th and 28th groups of subcarriers among the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the 2 third resource units are the 4 discrete second subcarriers in the 4th, 12th, 22nd and 30th groups of subcarriers among the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the 2 third resource units are the 4 discrete second subcarriers in the 6th, 14th, 24th and 32nd groups of subcarriers among the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the 2 third resource units are the 4 discrete second subcarriers in the 8th, 16th, 26th and 34th groups of subcarriers among the 35 groups of subcarriers.

[0318] In a second possible design, the four discrete pilot subcarriers of the two third resource units are respectively located in four groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st, and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0319] Exemplarily, the 4 discrete pilot subcarriers of the 2 third resource units are the 4 discrete second subcarriers in the 1st, 9th, 19th and 27th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the 2 third resource units are the 4 discrete second subcarriers in the 3rd, 11th, 21st and 29th groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the 2 third resource units are the 4 discrete second subcarriers in the 5th, 13th, 23rd and 31st groups of subcarriers in the 35 groups of subcarriers; or, the 4 discrete pilot subcarriers of the 2 third resource units are the 4 discrete second subcarriers in the 7th, 15th, 25th and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0320] Optionally, the four scattered pilot subcarriers of the two third resource units are the second subcarriers in each group of subcarriers in the four groups of subcarriers.

[0321] For the description of the pilot subcarriers included in the third resource unit, reference may be made to the aforementioned description of “the third resource unit includes 2 discrete pilot subcarriers”, which will not be repeated here.

[0322] Optionally, the pilot subcarrier of the second resource unit may also be determined according to the pilot subcarrier of the third resource unit.

[0323] The pilot subcarriers included in the second resource unit can be the four pilot subcarriers included in the corresponding two third resource units. This can make the pilot subcarriers more evenly distributed, avoid the pilot subcarriers of the second resource unit being too close to each other, and further avoid narrowband interference contaminating too many pilot subcarriers, which can cause inaccurate phase offset estimation.

[0324] Exemplarily, the pilot subcarriers included in the second resource unit 1 may be the two pilot subcarriers included in its corresponding third resource unit 1 and the two pilot subcarriers included in the third resource unit 2. The pilot subcarriers included in the second resource unit 2 may be the two pilot subcarriers included in its corresponding third resource unit 3 and the two pilot subcarriers included in the third resource unit 4. The pilot subcarriers included in the second resource unit 3 may be the two pilot subcarriers included in its corresponding third resource unit 5 and the two pilot subcarriers included in the third resource unit 6. The pilot subcarriers included in the second resource unit 4 may be the two pilot subcarriers included in its corresponding third resource unit 7 and the two pilot subcarriers included in the third resource unit 8. The pilot subcarriers included in the second resource unit 5 may be the two pilot subcarriers included in its corresponding third resource unit 9 and the two pilot subcarriers included in the third resource unit 10. The pilot subcarriers included in the second resource unit 6 may be the two pilot subcarriers included in its corresponding third resource unit 11 and the two pilot subcarriers included in the third resource unit 12. The pilot subcarriers included in the second resource unit 7 may be the two pilot subcarriers included in its corresponding third resource unit 13 and the two pilot subcarriers included in the third resource unit 14. The pilot subcarriers included in the second resource unit 8 may be the two pilot subcarriers included in its corresponding third resource unit 15 and the two pilot subcarriers included in the third resource unit 16.

[0325] For the description of the pilot subcarriers of the second resource unit, reference may be made to the aforementioned description of “the second resource unit includes 4 discrete pilot subcarriers”, which will not be repeated here.

[0326] Based on the above design of the pilot subcarriers of the second resource unit, optionally, the four discrete pilot subcarriers included in the first resource unit can also be determined based on the pilot subcarriers of the second resource unit. For details, please refer to the above description of "the first resource unit includes four discrete pilot subcarriers", which is not repeated here.

[0327] Based on the above description of the pilot subcarriers of the first resource unit, optionally, the eight discrete pilot subcarriers included in the fourth resource unit can also be determined based on the pilot subcarriers of the first resource unit. For details, please refer to the above description of "the fourth resource unit includes eight discrete pilot subcarriers", which is not repeated here.

[0328] Different from FIG. 6 , FIG. 9 , or FIG. 10 , the embodiment of the present application further provides another communication method, as shown in FIG. 11 , which may include:

[0329] Step 1101: A first communication device transmits an OFDM symbol through a fourth resource unit.

[0330] Among them, the fourth resource unit includes 35 groups of subcarriers, 1 26-tone DRU and 6 single subcarriers; each group of subcarriers includes 2 subcarrier subsets, each subcarrier subset includes a continuous first subcarrier, a second subcarrier and a third subcarrier; the third subcarrier in the first subcarrier subset is discrete from the first subcarrier in the second subcarrier subset.

[0331] It can be understood that the "subset" in the embodiment of the present application is a logical concept, and there is no technical feature of "subset". It is only for the convenience of describing the three consecutive subcarriers in the fourth resource unit.

[0332] Optionally, when the transmission bandwidth is 40MHz, 40MHz includes 2 fourth resource units; the first subcarrier subset in the nth group of subcarriers of the 2 fourth resource units are continuous; the second subcarrier subset in the nth group of subcarriers of the 2 fourth resource units are continuous, and the first subcarrier set in the nth group of subcarriers of the second fourth resource unit is continuous with the second subcarrier subset in the nth group of subcarriers of the first fourth resource unit; n=1,2,…,35.

[0333] Optionally, for specific examples of the indexes of the subcarriers included in the above-mentioned two fourth resource units, reference can be made to the aforementioned examples of the indexes of the subcarriers included in the fourth resource unit 1 to the fourth resource unit 2, which will not be repeated here.

[0334] Optionally, the first communication device transmitting OFDM symbols through the fourth resource unit can be understood as: sending OFDM symbols through the fourth resource unit, or receiving OFDM symbols through the fourth resource unit, without limitation.

[0335] 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 fourth resource unit.

[0336] It is understandable that some fields of the PPDU (such as the preamble field) may not be transmitted on the fourth resource unit, but may be transmitted in units of 40 MHz channels.

[0337] Based on the fourth resource unit shown in FIG. 11 , optionally, the first resource unit may also be determined based on the fourth resource unit.

[0338] The fourth resource unit includes two subcarriers included in the first resource unit; the first resource unit includes the first subcarrier subset and a single subcarrier in the 35 groups of subcarriers; or the first resource unit includes the second subcarrier subset and a single subcarrier in the 35 groups of subcarriers. The first resource unit may also be referred to as a 106-tone DRU.

[0339] Optionally, when the transmission bandwidth is 40 MHz, 40 MHz includes 4 first resource units; the n-th group of subcarriers of the 4 first resource units are continuous, and n=1, 2,…, 35.

[0340] Exemplarily, the fourth resource unit 1 may include the subcarriers included in the first resource unit 1 and the first resource unit 3. The fourth resource unit 2 may include the subcarriers included in the first resource unit 2 and the first resource unit 4.

[0341] Optionally, 40 MHz may include the first resource unit 1 to the first resource unit 4. The description of the four first resource units may refer to the above description of the first resource unit and will not be repeated here.

[0342] Based on the above description of the first resource unit, optionally, the second resource unit may be determined based on the above first resource unit. Specific details may refer to the above description of "determining the second resource unit based on the first resource unit", which will not be repeated here.

[0343] Based on the above description of the second resource unit, optionally, a third resource unit may be determined based on the above second resource unit. Detailed descriptions may be made of the above description of "determining the third resource unit based on the second resource unit" and will not be repeated here.

[0344] Based on the above description of the fourth resource unit, optionally, the fourth resource unit may include 8 scattered pilot subcarriers.

[0345] The eight scattered pilot subcarriers of the fourth resource unit are respectively located in eight groups of subcarriers among the 35 groups of subcarriers.

[0346] Optionally, the 8 scattered pilot subcarriers of the fourth resource unit are respectively located in 8 groups of subcarriers among the 1st to 17th and 20th to 34th groups of subcarriers in the 35 groups of subcarriers.

[0347] Optionally, the 4 discrete pilot subcarriers of the fourth resource unit are respectively located in 4 groups of subcarriers among the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, 30th, 32nd, and 34th groups of subcarriers in the 35 groups of subcarriers; the other 4 discrete pilot subcarriers of the fourth resource unit are respectively located in 4 groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st, and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0348] Optionally, the 8 scattered pilot subcarriers of the fourth resource unit are the second subcarriers in the 8 groups of subcarriers.

[0349] For the description of the pilot subcarriers included in the fourth resource unit, reference may be made to the aforementioned description of “the fourth resource unit includes 8 discrete pilot subcarriers”, which will not be repeated here.

[0350] Optionally, the pilot subcarrier of the first resource unit may also be determined according to the pilot subcarrier of the fourth resource unit.

[0351] The first resource unit includes 4 discrete pilot subcarriers; the 4 discrete pilot subcarriers of the first resource unit are respectively located in 4 groups of subcarriers among the 35 groups of subcarriers.

[0352] In a first possible design, the four discrete pilot subcarriers of the first resource unit are respectively located in four groups of subcarriers among the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, 30th, 32nd, and 34th groups of subcarriers in the 35 groups of subcarriers.

[0353] In a second possible design, the four discrete pilot subcarriers of the first resource unit are respectively located in four groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st, and 33rd groups of subcarriers in the 35 groups of subcarriers.

[0354] Optionally, the four scattered pilot subcarriers of the first resource unit are the second subcarriers in each group of subcarriers in the four groups of subcarriers.

[0355] Optionally, the description of the pilot subcarriers included in the first resource unit may refer to the aforementioned description of “the first resource unit includes 4 discrete pilot subcarriers”, which is not repeated here.

[0356] Based on the above design of the pilot subcarriers of the first resource unit, optionally, the four discrete pilot subcarriers included in the second resource unit can also be determined based on the pilot subcarriers of the first resource unit. For details, please refer to the above description of "the second resource unit includes four discrete pilot subcarriers", which is not repeated here.

[0357] Based on the above description of the pilot subcarriers of the second resource unit, optionally, the two discrete pilot subcarriers included in the third resource unit can also be determined based on the pilot subcarriers of the second resource unit. For details, please refer to the above description of "the third resource unit includes two discrete pilot subcarriers", which is not repeated here.

[0358] The first resource unit designed based on the distributed RU technology in each embodiment shown in Figures 6 to 11 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect). At the same time, the first resource unit can include three consecutive subcarriers, which facilitates smoothing of the estimated channel coefficients in channel estimation to obtain a channel smoothing gain, improve the accuracy of channel estimation, thereby reducing the packet error rate and improving system throughput.

[0359] The maximum power spectral density (PSD) is limited to x mw per 1 MHz. For example, with a subcarrier spacing of 78.125 kHz, 1 MHz can contain 12.8 (approximately 13) subcarriers. Since the average power of each subcarrier is the same during a transmission, the maximum number of signal-carrying subcarriers among any 13 consecutive subcarriers determines the average power per subcarrier, and thus the signal's transmit power. For example, in a 40 MHz bandwidth (484 subcarriers), if at most 5 of the 13 consecutive subcarriers carry signals, the average power per subcarrier is x(mw) / 5. If there are 26 signal-carrying subcarriers, the total transmit power is x(mw) / 5*26.

[0360] 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.

[0361] Specifically, the first resource unit provided in the embodiment of the present application has a maximum of 3 signals carried in any 13 subcarriers arranged in frequency domain order, and its power amplification factor can reach 4.3. If you want to get a larger power amplification factor, for a 106-tone DRU, at most 2 signals are carried in any 13 subcarriers arranged in frequency domain order, which requires 106 / 2*13=689 subcarriers, which exceeds the 512 subcarriers of the 40MHz bandwidth. Therefore, the maximum power amplification factor of the 106-tone DRU is 4.3, that is, the first resource unit provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0362] The second resource unit designed based on the distributed RU technology in each embodiment shown in Figures 6 to 11 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above 8 second resource units can achieve a larger power amplification factor. At the same time, the second resource unit 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 reducing the packet error rate and improving the system throughput.

[0363] Specifically, the second resource unit provided in the embodiment of the present application has a maximum of 2 signals carried in any 13 subcarriers arranged in frequency domain order, and its power amplification factor can reach 6.5. If you want to get a larger power amplification factor, for a 52-tone DRU, at most 1 signal is carried in any 13 subcarriers arranged in frequency domain order, which requires 52 / 1*13=676 subcarriers, which exceeds the 512 subcarriers of the 40MHz bandwidth. Therefore, the maximum power amplification factor of the 52-tone DRU is 6.5, that is, the second resource unit provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0364] The third resource unit and the 17th and 18th 26-tone DRU designed based on the distributed RU technology in the various embodiments shown in Figures 6 to 11 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above 16 third resource units and the 17th and 18th 26-tone DRUs can achieve a larger power amplification factor.

[0365] Specifically, the third resource unit and the 17th and 18th 26-tone DRUs provided in the embodiment of the present application have at most one signal in any 13 subcarriers arranged in frequency domain order, and their power amplification factor can reach 13. That is, the third resource unit and the 17th and 18th 26-tone DRUs provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0366] The fourth resource unit designed based on the distributed RU technology in each embodiment shown in Figures 6 to 11 above can discretize the limited number of subcarriers into a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above two fourth resource units can achieve a larger power amplification factor. At the same time, each fourth resource unit can include three consecutive subcarriers, which is convenient for smoothing the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby reducing the packet error rate and improving system throughput.

[0367] Specifically, the fourth resource unit provided in the embodiment of the present application has a maximum of 7 signals carried in any 13 consecutive subcarriers arranged in frequency domain order, and its power amplification factor can reach 1.86. If you want to get a larger power amplification factor, for a 242-tone DRU, at most 6 of the 13 consecutive subcarriers carry signals, which requires 242 / 6*13=524.3 subcarriers, which exceeds the 512 subcarriers of the 40MHz bandwidth. Therefore, the maximum power amplification factor of the 242-tone DRU is 1.86, that is, the fourth resource unit provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0368] It can be understood that the maximum power gain (or power per subcarrier) of the third resource unit and the 17th and 18th 26-tone DRUs in the embodiments shown in Figures 6 to 11 is higher than that of the first resource unit, the second resource unit and the fourth resource.

[0369] Different from FIG. 6 to FIG. 11 above, the embodiment of the present application further provides another communication method, as shown in FIG. 12 , which may include:

[0370] Step 1201: A first communication device transmits an OFDM symbol through a first resource unit.

[0371] The first resource unit includes 35 groups of subcarriers and one single subcarrier. Each group of subcarriers includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in frequency domain order. The first and second subcarriers are discrete, while the second and third subcarriers are continuous. Alternatively, the first and second subcarriers are continuous, while the second and third subcarriers are discrete. This first resource unit can also be called a 106-tone DRU.

[0372] Optionally, for each group of subcarriers, the number of subcarriers spaced between two discrete subcarriers is greater than or equal to 3.

[0373] 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 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 equal to 3.

[0374] In another example, when the first subcarrier and the second subcarrier are discrete, the number of subcarriers between the first subcarrier and the second subcarrier may be greater than 3 (e.g., 4, 5, etc.). Alternatively, when the second subcarrier and the third subcarrier are discrete, the number of subcarriers between the second subcarrier and the third subcarrier may be greater than 3 (e.g., 4, 5, etc.).

[0375] Optionally, when the transmission bandwidth is 40 MHz, 40 MHz may include 4 first resource units.

[0376] 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.

[0377] Where n = 1, 2,…, 35.

[0378] 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.

[0379] For example, the nth group of subcarriers of the first resource unit 1 includes the first subcarrier 1-n-1, the second subcarrier 1-n-2, and the third subcarrier 1-n-3; the nth group of subcarriers of the first resource unit 2 includes the first subcarrier 2-n-1, the second subcarrier 2-n-2, and the third subcarrier 2-n-3; the nth group of subcarriers of the first resource unit 3 includes the first subcarrier 3-n-1, the second subcarrier 3-n-2, and the third subcarrier 3-n-3; the nth group of subcarriers of the first resource unit 4 includes the first subcarrier 4-n-1, the second subcarrier 4-n-2, and the third subcarrier 4-n-3. -2, third subcarrier 4-n-3 as an example, the nth group of subcarriers of the four first resource units can be arranged in order in the frequency domain: continuous (first subcarrier 1-n-1, first subcarrier 2-n-1, first subcarrier 3-n-1, first subcarrier 4-n-1), continuous (second subcarrier 1-n-2, third subcarrier 1-n-3, second subcarrier 2-n-2, third subcarrier 2-n-3, second subcarrier 3-n-2, third subcarrier 3-n-3, second subcarrier 4-n-2, third subcarrier 4-n-3).

[0380] Among them, the first subcarrier 4-n-1 in the nth group of subcarriers of the fourth first resource unit and the second subcarrier 1-n-2 in the nth group of subcarriers of the first first resource unit can be continuous or discrete, without restriction.

[0381] 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.

[0382] Where n = 1, 2,…, 35.

[0383] 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.

[0384] For example, the nth group of subcarriers of the first resource unit 1 includes the first subcarrier 1-n-1, the second subcarrier 1-n-2, and the third subcarrier 1-n-3; the nth group of subcarriers of the first resource unit 2 includes the first subcarrier 2-n-1, the second subcarrier 2-n-2, and the third subcarrier 2-n-3; the nth group of subcarriers of the first resource unit 3 includes the first subcarrier 3-n-1, the second subcarrier 3-n-2, and the third subcarrier 3-n-3; the nth group of subcarriers of the first resource unit 4 includes the first subcarrier 4-n-1, the second subcarrier 4-n-2, and the third subcarrier 4-n-3. -2, the third subcarrier 4-n-3 is taken as an example, the nth group of subcarriers of the four first resource units can be arranged in order in the frequency domain: continuous (first subcarrier 1-n-1, second subcarrier 1-n-2, first subcarrier 2-n-1, second subcarrier 2-n-2, first subcarrier 3-n-1, second subcarrier 3-n-2, first subcarrier 4-n-1, second subcarrier 4-n-2), continuous (third subcarrier 1-n-3, third subcarrier 2-n-3, third subcarrier 3-n-3, third subcarrier 4-n-3).

[0385] 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.

[0386] 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.

[0387] Based on the above description of the first resource unit, the following four possible examples are provided with reference to the following:

[0388] In the first example, the indexes of the subcarriers included in the first resource unit are: -244, -240, -239, -230, -226, -225, -216, -212, -211, -202, -198, -197, -188, -184, -183, -174, -170, -169, -160, -156, -155, -146, -142, -141, -132, -128, -127, -118, -114, -113, -104, -100, -99, -90, -86, -85, -76, -72, -71, -62, -58, -57, -48, - or

[0389] In the second example, the indexes of the subcarriers included in the first resource unit are: -243, -238, -237, -229, -224, -223, -215, -210, -209, -201, -196, -195, -187, -182, -181, -173, -168, -167, -159, -154, -153, -145, -140, -139, -131, -126, -125, -117, -112, -111, -103, -98, -97, -89, -84, -83, -75, -70, -69, -61, -56, -55, -47, - or

[0390] In a third example, the indexes of the subcarriers included in the first resource unit are: -242, -236, -235, -228, -222, -221, -214, -208, -207, -200, -194, -193, -186, -180, -179, -172, -166, -165, -158, -152, -151, -144, -138, -137, -130, -124, -123, -116, -110, -109, -102, -96, -95, -88, -82, -81, -74, -68, -67, -60, -54, -53, -46, - or

[0391] In the fourth example, the indexes of the subcarriers included in the first resource unit are: -241, -234, -233, -227, -220, -219, -213, -206, -205, -199, -192, -191, -185, -178, -177, -171, -164, -163, -157, -150, -149, -143, -136, -135, -129, -122, -121, -115, -108, -107, -101, -94, -93, -87, -80, -79, -73, -66, -65, -59, -52, -51, -45, - 38, -37, -31, -24, -23, -17, -10, -9, -3, 9, 10, 16, 23, 24, 30, 37, 38, 44, 51, 52, 58, 65, 66, 72, 79, 80, 86, 93, 94, 100, 107, 108, 114, 121, 122, 127, 134, 135, 140, 147, 148, 153, 160, 161, 166, 173, 174, 179, 186, 187, 192, 199, 200, 205, 212, 213, 218, 225, 226, 231, 238, 239, 244.

[0392] Optionally, 40 MHz may include the four first resource units shown in the above four examples.

[0393] Optionally, the subcarrier corresponding to the first resource unit may be determined based on the following method:

[0394] Among them, 484 subcarriers (i.e., subcarriers indexed as [-244:-3, 3:244]) can be divided into 36 parts of subcarriers, each part of subcarriers can include 4, 13, or 14 subcarriers, and for each part of subcarriers, 1 single subcarrier and / or 2 consecutive subcarriers can be sequentially allocated to 4 first resource units, and the allocation of 1 single subcarrier and 2 consecutive subcarriers is alternated (the first resource unit can also be described as including alternating single subcarriers and two consecutive subcarriers), and the remaining subcarriers in each part of subcarriers are not allocated.

[0395] For example, as shown in FIG13 , each of the 1st to 25th parts of the 36 parts of subcarriers may include 14 subcarriers, each of the 26th to 35th parts of the subcarriers may include 13 subcarriers, and the 36th part of the subcarriers may include 4 subcarriers.

[0396] The first resource unit 1 may include the 1st, 5th, and 6th subcarriers in the 1st to 35th parts of subcarriers and the 1st subcarrier in the 36th part of subcarriers.

[0397] The first resource unit 2 may include the 2nd, 7th, and 8th subcarriers in the 1st to 35th parts of subcarriers and the 2nd subcarrier in the 36th part of subcarriers.

[0398] The first resource unit 3 may include the 3rd, 9th, and 10th subcarriers in the 1st to 35th parts of subcarriers and the 3rd subcarrier in the 36th part of subcarriers.

[0399] The first resource unit 4 may include the 4th, 11th, and 12th subcarriers in the 1st to 35th parts of subcarriers and the 4th subcarrier in the 36th part of subcarriers.

[0400] Optionally, the first communication device transmitting OFDM symbols through the first resource unit can be understood as: sending OFDM symbols through the first resource unit, or receiving OFDM symbols through the first resource unit, without limitation.

[0401] 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 first resource unit.

[0402] 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 40 MHz channels.

[0403] Based on the first resource unit shown in FIG. 12 to FIG. 13 , optionally, the second resource unit can also be determined based on the first resource unit.

[0404] The subcarriers included in the first resource unit include two subcarriers included in the second resource unit; the second resource unit includes the odd-numbered subcarriers of the first 104 subcarriers arranged in frequency domain order in the first resource unit; or the second resource unit includes the even-numbered subcarriers of the first 104 subcarriers arranged in frequency domain order in the first resource unit. The second resource unit may also be called a 52-tone DRU.

[0405] Exemplarily, eight second resource units can be determined based on the four first resource units shown in Figures 12 and 13 above, that is, second resource unit 1 can be determined based on the odd-numbered subcarriers among the first 104 subcarriers arranged in frequency domain order in first resource unit 1, and second resource unit 2 can be determined based on the even-numbered subcarriers among the first 104 subcarriers arranged in frequency domain order in first resource unit 1. Second resource unit 3 can be determined based on the odd-numbered subcarriers among the first 104 subcarriers arranged in frequency domain order in first resource unit 2, and second resource unit 4 can be determined based on the even-numbered subcarriers among the first 104 subcarriers arranged in frequency domain order in first resource unit 2. Second resource unit 5 can be determined based on the odd-numbered subcarriers among the first 104 subcarriers arranged in frequency domain order in first resource unit 3, and second resource unit 6 can be determined based on the even-numbered subcarriers among the first 104 subcarriers arranged in frequency domain order in first resource unit 3. The second resource unit 7 is determined according to the odd subcarriers among the first 104 subcarriers arranged in frequency domain order in the first resource unit 4, and the second resource unit 8 is determined according to the even subcarriers among the first 104 subcarriers arranged in frequency domain order in the first resource unit 4.

[0406] The indexes of the subcarriers included in the second resource unit 1 are: -244, -239, -226, -216, -211, -198, -188, -183, -170, -160, -155, -142, -132, -127, -114, -104, -99, -86, -76, -71, -58, -48, -43, -30, -20, -15, 3, 13, 18, 31, 41, 46, 59, 69, 74, 87, 97, 102, 115, 124, 129, 141, 150, 155, 167, 176, 181, 193, 202, 207, 219, 228; or

[0407] The indexes of the subcarriers included in the second resource unit 2 are: -240, -230, -225, -212, -202, -197, -184, -174, -169, -156, -146, -141, -128, -118, -113, -100, -90, -85, -72, -62, -57, -44, -34, -29, -16, -6, 4, 17, 27, 32, 45, 55, 60, 73, 83, 88, 101, 111, 116, 128, 137, 142, 154, 163, 168, 180, 189, 194, 206, 215, 220, 232; or

[0408] The indexes of the subcarriers included in the second resource unit 3 are: -243, -237, -224, -215, -209, -196, -187, -181, -168, -159, -153, -140, -131, -125, -112, -103, -97, -84, -75, -69, -56, -47, -41, -28, -19, -13, 5, 14, 20, 33, 42, 48, 61, 70, 76, 89, 98, 104, 117, 125, 131, 143, 151, 157, 169, 177, 183, 195, 203, 209, 221, 229; or

[0409] The indexes of the subcarriers included in the second resource unit 4 are: -238, -229, -223, -210, -201, -195, -182, -173, -167, -154, -145, -139, -126, -117, -111, -98, -89, -83, -70, -61, -55, -42, -33, -27, -14, -5, 6, 19, 28, 34, 47, 56, 62, 75, 84, 90, 103, 112, 118, 130, 138, 144, 156, 164, 170, 182, 190, 196, 208, 216, 222, 234; or

[0410] The indexes of the subcarriers included in the second resource unit 5 are: -242, -235, -222, -214, -207, -194, -186, -179, -166, -158, -151, -138, -130, -123, -110, -102, -95, -82, -74, -67, -54, -46, -39, -26, -18, -11, 7, 15, 22, 35, 43, 50, 63, 71, 78, 91, 99, 106, 119, 126, 133, 145, 152, 159, 171, 178, 185, 197, 204, 211, 223, 230; or

[0411] The indexes of the subcarriers included in the second resource unit 6 are: -236, -228, -221, -208, -200, -193, -180, -172, -165, -152, -144, -137, -124, -116, -109, -96, -88, -81, -68, -60, -53, -40, -32, -25, -12, -4, 8, 21, 29, 36, 49, 57, 64, 77, 85, 92, 105, 113, 120, 132, 139, 146, 158, 165, 172, 184, 191, 198, 210, 217, 224, 236; or

[0412] The indexes of the subcarriers included in the second resource unit 7 are: -241, -233, -220, -213, -205, -192, -185, -177, -164, -157, -149, -136, -129, -121, -108, -101, -93, -80, -73, -65, -52, -45, -37, -24, -17, -9, 9, 16, 24, 37, 44, 52, 65, 72, 80, 93, 100, 108, 121, 127, 135, 147, 153, 161, 173, 179, 187, 199, 205, 213, 225, 231; or

[0413] The indexes of the subcarriers included in the second resource unit 8 are: -234, -227, -219, -206, -199, -191, -178, -171, -163, -150, -143, -135, -122, -115, -107, -94, -87, -79, -66, -59, -51, -38, -31, -23, -10, -3, 10, 23, 30, 38, 51, 58, 66, 79, 86, 94, 107, 114, 122, 134, 140, 148, 160, 166, 174, 186, 192, 200, 212, 218, 226, and 238.

[0414] Optionally, 40 MHz may include the above-mentioned second resource unit 1 to second resource unit 8.

[0415] Based on the above description of the second resource unit, optionally, a third resource unit may also be determined based on the above second resource unit.

[0416] The subcarriers included in the second resource unit are the same as the subcarriers included in the two third resource units. The third resource unit may include the odd-numbered subcarriers in the second resource unit (such as the 1st, 3rd, 5th, 7th, ..., 49th, 51st subcarriers); or, the third resource unit includes the even-numbered subcarriers in the second resource unit (such as the 2nd, 4th, 6th, 8th, ..., 50th, 52nd subcarriers). The third resource unit may also be called a 26-tone DRU.

[0417] For example, taking the second resource units as the above-mentioned second resource units 1 to 8 as an example, 16 third resource units can be determined based on the second resource units 1 to 8, that is, third resource units 1 to 16 can be determined. Specifically, third resource unit 1 can be determined based on the odd-numbered subcarriers in second resource unit 1, and third resource unit 2 can be determined based on the even-numbered subcarriers in second resource unit 1. Third resource unit 3 can be determined based on the odd-numbered subcarriers in second resource unit 2, and third resource unit 4 can be determined based on the even-numbered subcarriers in second resource unit 2. Third resource unit 5 can be determined based on the odd-numbered subcarriers in second resource unit 3, and third resource unit 6 can be determined based on the even-numbered subcarriers in second resource unit 3. Third resource unit 7 can be determined based on the odd-numbered subcarriers in second resource unit 4, and third resource unit 8 can be determined based on the even-numbered subcarriers in second resource unit 4. Third resource unit 9 can be determined based on the odd-numbered subcarriers in second resource unit 5, and third resource unit 10 can be determined based on the even-numbered subcarriers in second resource unit 5. A third resource unit 11 is determined based on the odd-numbered subcarriers in the second resource unit 6, and a third resource unit 12 is determined based on the even-numbered subcarriers in the second resource unit 6. A third resource unit 13 is determined based on the odd-numbered subcarriers in the second resource unit 7, and a third resource unit 14 is determined based on the even-numbered subcarriers in the second resource unit 7. A third resource unit 15 is determined based on the odd-numbered subcarriers in the second resource unit 8, and a third resource unit 16 is determined based on the even-numbered subcarriers in the second resource unit 8.

[0418] The indexes of the subcarriers included in the third resource unit 1 are: -244, -226, -211, -188, -170, -155, -132, -114, -99, -76, -58, -43, -20, 3, 18, 41, 59, 74, 97, 115, 129, 150, 167, 181, 202, 219; or

[0419] The subcarrier indices included in the third resource unit 2 are: -239, -216, -198, -183, -160, -142, -127, -104, -86, -71, -48, -30, -15, 13, 31, 46, 69, 87, 102, 124, 141, 155, 176, 193, 207, 228; or

[0420] The subcarrier indices included in the third resource unit 3 are: -240, -225, -202, -184, -169, -146, -128, -113, -90, -72, -57, -34, -16, 4, 27, 45, 60, 83, 101, 116, 137, 154, 168, 189, 206, 220; or

[0421] The indexes of the subcarriers included in the third resource unit 4 are: -230, -212, -197, -174, -156, -141, -118, -100, -85, -62, -44, -29, -6, 17, 32, 55, 73, 88, 111, 128, 142, 163, 180, 194, 215, 232; or

[0422] The indexes of the subcarriers included in the third resource unit 5 are: -243, -224, -209, -187, -168, -153, -131, -112, -97, -75, -56, -41, -19, 5, 20, 42, 61, 76, 98, 117, 131, 151, 169, 183, 203, 221; or

[0423] The subcarrier indices included in the third resource unit 6 are: -237, -215, -196, -181, -159, -140, -125, -103, -84, -69, -47, -28, -13, 14, 33, 48, 70, 89, 104, 125, 143, 157, 177, 195, 209, 229; or

[0424] The indexes of the subcarriers included in the third resource unit 7 are: -238, -223, -201, -182, -167, -145, -126, -111, -89, -70, -55, -33, -14, 6, 28, 47, 62, 84, 103, 118, 138, 156, 170, 190, 208, 222; or

[0425] The subcarrier indices included in the third resource unit 8 are: -229, -210, -195, -173, -154, -139, -117, -98, -83, -61, -42, -27, -5, 19, 34, 56, 75, 90, 112, 130, 144, 164, 182, 196, 216, 234; or

[0426] The subcarrier indexes included in the third resource unit 9 are: -242, -222, -207, -186, -166, -151, -130, -110, -95, -74, -54, -39, -18, 7, 22, 43, 63, 78, 99, 119, 133, 152, 171, 185, 204, 223; or

[0427] The subcarrier indexes included in the third resource unit 10 are: -235, -214, -194, -179, -158, -138, -123, -102, -82, -67, -46, -26, -11, 15, 35, 50, 71, 91, 106, 126, 145, 159, 178, 197, 211, 230; or

[0428] The indexes of the subcarriers included in the third resource unit 11 are: -236, -221, -200, -180, -165, -144, -124, -109, -88, -68, -53, -32, -12, 8, 29, 49, 64, 85, 105, 120, 139, 158, 172, 191, 210, 224; or

[0429] The subcarrier indexes included in the third resource unit 12 are: -228, -208, -193, -172, -152, -137, -116, -96, -81, -60, -40, -25, -4, 21, 36, 57, 77, 92, 113, 132, 146, 165, 184, 198, 217, 236; or

[0430] The subcarrier indexes included in the third resource unit 13 are: -241, -220, -205, -185, -164, -149, -129, -108, -93, -73, -52, -37, -17, 9, 24, 44, 65, 80, 100, 121, 135, 153, 173, 187, 205, 225; or

[0431] The subcarrier indexes included in the third resource unit 14 are: -233, -213, -192, -177, -157, -136, -121, -101, -80, -65, -45, -24, -9, 16, 37, 52, 72, 93, 108, 127, 147, 161, 179, 199, 213, 231; or

[0432] The subcarrier indexes included in the third resource unit 15 are: -234, -219, -199, -178, -163, -143, -122, -107, -87, -66, -51, -31, -10, 10, 30, 51, 66, 86, 107, 122, 140, 160, 174, 192, 212, 226; or

[0433] The subcarrier indexes included in the third resource unit 16 are: -227, -206, -191, -171, -150, -135, -115, -94, -79, -59, -38, -23, -3, 23, 38, 58, 79, 94, 114, 134, 148, 166, 186, 200, 218, 238; or

[0434] Optionally, 40 MHz may include the third resource unit 1 to the third resource unit 16 .

[0435] Optionally, in addition to the above-mentioned 16 third resource units (also referred to as 16 26-tone DRUs), 40MHz may also include another 2 26-tone DRUs (or described as the 17th 26-tone DRU and the 18th 26-tone DRU). The 17th 26-tone DRU and the 18th 26-tone DRU may include 52 subcarriers corresponding to the subcarriers of 40MHz except for the subcarriers corresponding to the above-mentioned 16 third resource units.

[0436] Exemplarily, the subcarrier indices included in the 17th 26-tone DRU are: -232, -218, -204, -190, -176, -162, -148, -134, -120, -106, -92, -78, -64, -50, -36, -22, -8, 11, 25, 39, 53, 67, 81, 95, 109, 123.

[0437] The subcarrier indices included in the 18th 26-tone DRU are: -231, -217, -203, -189, -175, -161, -147, -133, -119, -105, -91, -77, -63, -49, -35, -21, -7, 12, 26, 40, 54, 68, 82, 96, 110, 136.

[0438] Based on the first resource unit shown in FIG. 12 to FIG. 13 , optionally, a fourth resource unit may also be determined based on the first resource unit.

[0439] The subcarriers included in the first resource unit are a subset of the subcarriers included in the fourth resource unit, and the fourth resource unit includes two first resource units, one 26-tone DRU, and four single subcarriers. The fourth resource unit can also be called a 242-tone DRU.

[0440] The 26-tone DRU included in the fourth resource unit is a 26-tone DRU not included in the second resource unit, or is described as a 26-tone DRU not included in the third resource unit, or is described as a 26-tone DRU between the 17th 26-tone DRU and the 18th 26-tone DRU.

[0441] Exemplarily, the fourth resource unit 1 may include the first first resource unit (such as the first resource unit 1 described above), the third first resource unit (such as the first resource unit 3 described above), a 26-tone DRU, and four single subcarriers. The fourth resource unit 2 may include the second first resource unit (such as the first resource unit 2 described above), the fourth first resource unit (such as the first resource unit 4 described above), a 26-tone DRU, and four single subcarriers.

[0442] The indexes of the subcarriers included in the fourth resource unit 1 are: -244, -240, -239, -230, -226, -225, -216, -212, -211, -202, -198, -197, -188, -184, -183, -174, -170, -169, -160, -156, -155, -146, -142, -141, -132, -128, -127, -118, -114, -113, -104, -100, -99, -90, -86, -85, -76, -72, -71, -62, -58, -57, -48, -44, -43, -34, -30, -29, -20, -16, -15, -6, 3, 4, 13, 17, 18, 27, 31, 32, 41, 45, 46, 55, 59, 60, 69, 73, 74, 83, 87, 88, 97, 101, 102, 111, 115, 116, 124, 128, 129, 137, 141, 142, 150, 154, 1 55, 163, 167, 168, 176, 180, 181, 189, 193, 194, 202, 206, 207, 215, 219, 220, 228, 232, 233, 241, -242, -236, -235, -228, -222, -221, -214, -208, -207, - 200, -194, -193, -186, -180, -179, -172, -166, -165, -158, -152, -151, -144, -138, -137, -130, -124, -123, -116, -110, -109, -102, -96, -95, -88, -82 , -81, -74, -68, -67, -60, -54, -53, -46, -40, -39, -32, -26, -25, -18, -12, -11, -4, 7, 8, 15, 21, 22, 29, 35, 36, 43, 49, 50, 57, 63, 64, 71, 77, 78, 85, 91, 92 ,99,105,106,113,119,120,126,132,133,139,145,146,152,158,159,165,171,172,178,184,185,191,197,198,204,210,211,217,223,224,230,2 36, 237, 243, -232, -218, -204, -190, -176, -162, -148, -134, -120, -106, -92, -78, -64, -50, -36, -22, -8, 11, 25, 39, 53, 67, 81, 95, 109, 123, 149, 175,201、227、

[0443] The indexes of the subcarriers included in the fourth resource unit 2 are: -243, -238, -237, -229, -224, -223, -215, -210, -209, -201, -196, -195, -187, -182, -181, -173, -168, -167, -159, -154, -153, -145, -140, -139, -131, -126, -125, -117, -112, -111, -103, -98, -97, -89, -84, -83, -75, -70, -69, -61, -56, -55, -47, -42, -41, -33, -28, -27, -19, -14, -13, -5, 5, 6, 14, 19, 20, 28, 33, 34, 42, 47, 48, 56, 61, 62, 70, 75, 76, 84, 89, 90, 98, 103, 104, 112, 117, 118, 125, 130, 131, 138, 143, 144, 151, 156, 157, 1 64, 169, 170, 177, 182, 183, 190, 195, 196, 203, 208, 209, 216, 221, 222, 229, 234, 235, 242, -241, -234, -233, -227, -220, -219, -213, -206, -205, -199, -192, -191, -185, -178, -177, -171, -164, -163, -157, -150, -149, -143, -136, -135, -129, -122, -121, -115, -108, -107, -101, -94, -93, -87, -80, -79, -73, -66, -65, -59, -52, -51, -45, -38, -37, -31, -24, -23, -17, -10, -9, -3, 9, 10, 16, 23, 24, 30, 37, 38, 44, 51, 52, 58, 65, 66, 72, 79, 80, 86, 93, 94, 100, 107, 108, 114, 121, 122, 127, 134, 135, 140, 147, 148, 153, 160, 161, 166, 173, 174, 179, 186, 187, 192, 199, 200, 205, 212, 213, 218, 225, 226, 231, 238, 2 39, 244, -231, -217, -203, -189, -175, -161, -147, -133, -119, -105, -91, -77, -63, -49, -35, -21, -7, 12, 26, 40, 54, 68, 82, 96, 110, 136, 162, 188, 214,240.

[0444] Optionally, 40 MHz may include the fourth resource unit 1 and the fourth resource unit 2 mentioned above.

[0445] Different from FIG. 6 to FIG. 13 above, the embodiment of the present application further provides another communication method, as shown in FIG. 14 , which may include:

[0446] Step 1401: A first communication device transmits an OFDM symbol through a second resource unit.

[0447] The second resource unit includes the odd-numbered subcarriers of the first 104 subcarriers in the 35 groups of subcarriers arranged in frequency domain order; or, the second resource unit includes the even-numbered subcarriers of the first 104 subcarriers in the 35 groups of subcarriers arranged in frequency domain order.

[0448] Each subcarrier group includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, while the second and third subcarriers are continuous; or the first subcarrier and the second subcarrier are continuous, while the second and third subcarriers are discrete. This second resource unit can also be called a 52-tone DRU.

[0449] Among them, the description of the 35 groups of subcarriers can refer to the description of the "35 groups of subcarriers" in Figure 12 above, and will not be repeated here.

[0450] Optionally, 40 MHz includes 8 second resource units, namely, second resource unit 1 to second resource unit 8. For a specific example of the index of the subcarriers included in the second resource unit 1 to the second resource unit 8, reference can be made to the example of the index of the subcarriers included in the second resource unit 1 to the second resource unit 8 in the embodiment shown in FIG12 , which is not described in detail here.

[0451] Optionally, the first communication device transmitting OFDM symbols through the second resource unit can be understood as: sending OFDM symbols through the second resource unit, or receiving OFDM symbols through the second resource unit, without limitation.

[0452] 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.

[0453] It is understandable that some fields of the PPDU (such as the preamble field) may not be transmitted on the second resource unit, but may be transmitted in units of 40 MHz channels.

[0454] Based on the second resource unit shown in Figure 14, optionally, a third resource unit can also be determined based on the second resource unit. For details, please refer to the relevant description of "determining the third resource unit based on the second resource unit" in the embodiment shown in Figure 12, which is not repeated here.

[0455] Optionally, 40 MHz may include 16 third resource units. For the description of the 16 third resource units, reference may be made to the description of the third resource units in the embodiment shown in FIG. 12 , and details are omitted.

[0456] Optionally, in addition to the aforementioned 16 third resource units (also referred to as 16 26-tone DRUs), the 40MHz band may further include two additional 26-tone DRUs (or described as the 17th 26-tone DRU and the 18th 26-tone DRU). For the description of the 17th 26-tone DRU and the 18th 26-tone DRU, reference may be made to the relevant description in the embodiment shown in FIG. 12 , and details are omitted here.

[0457] Based on the second resource unit shown in FIG. 12 , optionally, the first resource unit can also be determined based on the second resource unit.

[0458] The subcarriers included in the two second resource units are a subset of the subcarriers included in the first resource unit; the first resource unit includes 35 groups of subcarriers and one single subcarrier. Alternatively, the first resource unit may include two second resource units and one single subcarrier. This first resource unit may also be called a 106-tone DRU.

[0459] Optionally, when the transmission bandwidth is 40 MHz, 40 MHz may include 4 first resource units.

[0460] Exemplarily, first resource unit 1 may include second resource unit 1, second resource unit 2, and a single subcarrier. First resource unit 2 may include second resource unit 3, second resource unit 4, and a single subcarrier. First resource unit 3 may include second resource unit 5, second resource unit 6, and a single subcarrier. First resource unit 4 may include second resource unit 7, second resource unit 8, and a single subcarrier.

[0461] Optionally, 40 MHz may include the first resource unit 1 to the first resource unit 4. For the description of the four first resource units, reference may be made to the description of the first resource unit in the embodiment shown in FIG12 , and details are omitted here.

[0462] Based on the above description of the first resource unit, optionally, a fourth resource unit may be determined based on the above first resource unit. Specific details may refer to the description of "determining the fourth resource unit based on the first resource unit" in the embodiment shown in FIG12 , which will not be repeated here.

[0463] Different from FIG. 6 to FIG. 14 above, the embodiment of the present application further provides another communication method, as shown in FIG. 15 , which may include:

[0464] Step 1501: A first communication device transmits an OFDM symbol through a third resource unit.

[0465] The two third resource units include the odd-numbered subcarriers of the first 104 subcarriers in the 35 groups of subcarriers arranged in frequency domain order; or, the two third resource units include the even-numbered subcarriers of the first 104 subcarriers in the 35 groups of subcarriers arranged in frequency domain order.

[0466] Each subcarrier group includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in frequency domain order; the first subcarrier and the second subcarrier are discrete, while the second and third subcarriers are continuous; or the first subcarrier and the second subcarrier are continuous, while the second and third subcarriers are discrete. This third resource unit can also be called a 26-tone DRU.

[0467] Among them, the description of the 35 groups of subcarriers can refer to the description of the "35 groups of subcarriers" in Figure 12 above, and will not be repeated here.

[0468] Optionally, 40 MHz includes 16 third resource units, namely, third resource units 1 to 16. For a specific example of the index of the subcarriers included in the third resource units 1 to 16, refer to the example of the index of the subcarriers included in the third resource units 1 to 16 in the embodiment shown in FIG12 , which is not repeated here.

[0469] Optionally, the first communication device transmitting OFDM symbols through the third resource unit can be understood as: sending OFDM symbols through the third resource unit, or receiving OFDM symbols through the third resource unit, without limitation.

[0470] 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.

[0471] 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 40 MHz channels.

[0472] Based on the third resource unit shown in FIG. 15 , optionally, the second resource unit can also be determined based on the third resource unit.

[0473] The subcarriers included in the third resource unit are a subset of the subcarriers included in the second resource unit, and the second resource unit includes two third resource units. The second resource unit can also be called a 52-tone DRU.

[0474] For example, second resource unit 1 may include third resource unit 1 and third resource unit 2. Second resource unit 2 may include third resource unit 3 and third resource unit 4. Second resource unit 3 may include third resource unit 5 and third resource unit 6. Second resource unit 4 may include third resource unit 7 and third resource unit 8. Second resource unit 5 may include third resource unit 9 and third resource unit 10. Second resource unit 6 may include third resource unit 11 and third resource unit 12. Second resource unit 7 may include third resource unit 13 and third resource unit 14. Second resource unit 8 may include third resource unit 15 and third resource unit 16.

[0475] Optionally, 40 MHz may include the second resource units 1 to 8. For the description of the eight second resource units, reference may be made to the description of the second resource units in the embodiment shown in FIG12 , and details are omitted.

[0476] Based on the above description of the second resource unit, optionally, the first resource unit can also be determined based on the above second resource unit. For details, please refer to the relevant description of "determining the first resource unit based on the second resource unit" in the embodiment shown in Figure 14 above, which will not be repeated here.

[0477] Based on the above description of the first resource unit, optionally, a fourth resource unit may be determined based on the above first resource unit. Specific details may refer to the description of "determining the fourth resource unit based on the first resource unit" in the embodiment shown in FIG12 , which will not be repeated here.

[0478] Different from FIG. 6 to FIG. 15 , the embodiment of the present application further provides another communication method, as shown in FIG. 16 , which may include:

[0479] Step 1601: A first communication device transmits an OFDM symbol through a fourth resource unit.

[0480] The fourth resource unit includes 35 groups of subcarriers, one 26-tone DRU, and six single subcarriers. Each group of subcarriers includes two subcarrier subsets, each of which includes a first subcarrier, a second subcarrier, and a third subcarrier arranged in frequency domain order. The first and second subcarriers are discrete, while the second and third subcarriers are continuous. Alternatively, the first and second subcarriers are continuous, while the second and third subcarriers are discrete. This fourth resource unit can also be called a 242-tone DRU.

[0481] Among them, the description of the first subcarrier, the second subcarrier and the third subcarrier can refer to the relevant description in the above Figure 12 and will not be repeated here.

[0482] Optionally, when the transmission bandwidth is 40MHz, 40MHz includes 2 fourth resource units; for specific examples of the indexes of the subcarriers included in the 2 fourth resource units, please refer to the examples of the indexes of the subcarriers included in the fourth resource unit 1 to the fourth resource unit 2 in the embodiment shown in Figure 12 above, which will not be repeated here.

[0483] Optionally, the first communication device transmitting OFDM symbols through the fourth resource unit can be understood as: sending OFDM symbols through the fourth resource unit, or receiving OFDM symbols through the fourth resource unit, without limitation.

[0484] 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 fourth resource unit.

[0485] It is understandable that some fields of the PPDU (such as the preamble field) may not be transmitted on the fourth resource unit, but may be transmitted in units of 40 MHz channels.

[0486] Based on the fourth resource unit shown in FIG. 16 , optionally, the first resource unit can also be determined based on the fourth resource unit.

[0487] The fourth resource unit includes two subcarriers included in the first resource unit; the first resource unit includes the first subcarrier subset and a single subcarrier in the 35 groups of subcarriers; or the first resource unit includes the second subcarrier subset and a single subcarrier in the 35 groups of subcarriers. The first resource unit may also be referred to as a 106-tone DRU.

[0488] Optionally, when the transmission bandwidth is 40 MHz, 40 MHz includes 4 first resource units.

[0489] Exemplarily, the fourth resource unit 1 may include the subcarriers included in the first resource unit 1 and the first resource unit 3. The fourth resource unit 2 may include the subcarriers included in the first resource unit 2 and the first resource unit 4.

[0490] Optionally, 40 MHz may include the first resource unit 1 to the first resource unit 4. For the description of the four first resource units, reference may be made to the description of the first resource unit in the embodiment shown in FIG12 , and details are omitted here.

[0491] Based on the above description of the first resource unit, optionally, the second resource unit can also be determined based on the above first resource unit. For details, please refer to the relevant description of "determining the second resource unit based on the first resource unit" in the embodiment shown in Figure 12 above, which will not be repeated here.

[0492] Based on the above description of the second resource unit, optionally, a third resource unit may be determined based on the above second resource unit. Specific details may refer to the description of "determining the third resource unit based on the second resource unit" in the embodiment shown in FIG12 , which will not be repeated here.

[0493] The first resource unit designed based on the distributed RU technology in each embodiment shown in Figures 12 to 16 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above four first resource units can achieve a larger power amplification factor. At the same time, the first resource unit 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 approximately 2 / 3 of the subcarriers), thereby improving the accuracy of the channel estimation, thereby reducing the packet error rate and improving the system throughput.

[0494] Specifically, the first resource unit provided in the embodiment of the present application has a maximum of 3 signals carried in any 13 subcarriers arranged in frequency domain order, and its power amplification factor can reach 4.3. If you want to get a larger power amplification factor, for a 106-tone DRU, at most 2 signals are carried in any 13 subcarriers arranged in frequency domain order, which requires 106 / 2*13=689 subcarriers, which exceeds the 512 subcarriers of the 40MHz bandwidth. Therefore, the maximum power amplification factor of the 106-tone DRU is 4.3, that is, the first resource unit provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0495] The second resource unit designed based on the distributed RU technology in each embodiment shown in Figures 12 to 16 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above 8 second resource units can achieve a larger power amplification factor.

[0496] Specifically, the second resource unit provided in the embodiment of the present application has a maximum of 2 signals carried in any 13 subcarriers arranged in frequency domain order, and its power amplification factor can reach 6.5. If you want to get a larger power amplification factor, for a 52-tone DRU, at most 1 signal is carried in any 13 subcarriers arranged in frequency domain order, which requires 52 / 1*13=676 subcarriers, which exceeds the 512 subcarriers of the 40MHz bandwidth. Therefore, the maximum power amplification factor of the 52-tone DRU is 6.5, that is, the second resource unit provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0497] The third resource unit and the 17th and 18th 26-tone DRU designed based on the distributed RU technology in the various embodiments shown in Figures 12 to 16 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above 16 third resource units and the 17th and 18th 26-tone DRUs can achieve a larger power amplification factor.

[0498] Specifically, the third resource unit and the 17th and 18th 26-tone DRUs provided in the embodiment of the present application have at most one signal in any 13 subcarriers arranged in frequency domain order, and their power amplification factor can reach 13. That is, the third resource unit and the 17th and 18th 26-tone DRUs provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0499] The fourth resource unit designed based on the distributed RU technology in each embodiment shown in Figures 12 to 16 above can discretize the limited number of subcarriers to a wider bandwidth to maximize the transmission power (i.e., obtain a better power amplification effect), that is, each of the above two fourth resource units can achieve a larger power amplification factor. At the same time, each fourth resource unit can include two consecutive subcarriers, which is convenient for smoothing the estimated channel coefficients in channel estimation to obtain a channel smoothing gain (such as being able to obtain a channel smoothing gain of approximately 2 / 3 of the subcarriers), thereby improving the accuracy of channel estimation, thereby reducing the packet error rate and improving system throughput.

[0500] Specifically, the fourth resource unit provided in the embodiment of the present application has a maximum of 7 signals carried in any 13 consecutive subcarriers arranged in frequency domain order, and its power amplification factor can reach 1.86. If you want to get a larger power amplification factor, for a 242-tone DRU, at most 6 of the 13 consecutive subcarriers carry signals, which requires 242 / 6*13=524.3 subcarriers, which exceeds the 512 subcarriers of the 40MHz bandwidth. Therefore, the maximum power amplification factor of the 242-tone DRU is 1.86, that is, the fourth resource unit provided in the embodiment of the present application can achieve the maximum power amplification factor.

[0501] It can be understood that the maximum power gain (or power per subcarrier) of the third resource unit and the 17th and 18th 26-tone DRUs in the various embodiments shown in Figures 12 to 16 is higher than that of the first resource unit, the second resource unit and the fourth resource.

[0502] The DRU described in the method described in Figures 6 to 16 above can be used for transmission of downlink OFDMA PPDU. For example, the AP sends the downlink OFDMA PPDU according to the DRU described in the method described in Figures 6 to 16 above; accordingly, the STA receives the downlink OFDMA PPDU according to the DRU described in the method described in Figures 6 to 16 above.

[0503] The DRU described in the method described in Figures 6 to 16 above can also be used for the transmission of uplink OFDMA PPDU / TB PPDU. For example, the AP sends a trigger frame, and the STA sends the TB PPDU based on the resources allocated by the trigger frame and the DRU described in the method described in Figures 6 to 16 above; accordingly, the AP receives the TB PPDU according to the DRU described in the method described in Figures 6 to 16 above.

[0504] For example, as shown in Figure 18, taking the uplink multi-user transmission scenario as an example, the AP can send a trigger frame as shown in Figure 17 to the STA. The trigger frame carries the STA's identifier information and resource allocation information, where the User Info List field contains instruction information sent to different users, and each STA processes its own part. After receiving the trigger frame, the STA can use the TB PPDU to send uplink data frames on the corresponding resource unit and receive the BA frame sent by the AP after SIFS. Discrete RUs are sent by multiple users interspersed to increase the transmit power of each user under the condition of a certain bandwidth.

[0505] Specifically, the trigger frame may include resource scheduling parameters and other parameters for one or more first communication devices to send a PPDU. As shown in Figure 17, the trigger frame may include a frame control field, a duration field, a receiving address (RA) field, a sending address (SA) field, a common information field, a user information list field, a padding field, and a frame check sequence (FCS) field. For a detailed description of each field in the trigger frame, please refer to the corresponding description in the 802.11ax standard or the 802.11be standard and will not be elaborated here.

[0506] The public information field may include public information that each first communication device needs to read. The user information list field may include one or more user information fields, each user information field containing information that each first communication device needs to read. The user information field may include fields such as an association identification 12 (AID12) field and a resource unit allocation (RU allocation) subfield. The association identification field may be used to indicate the association identification of a certain receiving end communication device, and the resource unit allocation subfield may be used to indicate the location of the resource unit allocated to the first communication device (i.e., the first communication device indicated by AID12).

[0507] For example, taking the 802.11be standard as an example, in the user information field in the EHT form, the resource unit allocated to the first communication device (including RU, DRU or multiple resource units (multiple resource unit, MRU) composed of multiple resource units) can be indicated by the following subfields: resource unit allocation subfield (RU Allocation subfield), uplink bandwidth subfield (UL BW subfield) in the common information field, uplink bandwidth extension subfield (UL BW Extension subfield) in the special user information field, and master-slave 160 subfield (PS160subfield).

[0508] In the common information field, B55 indicates whether a special user information field exists in the user information field. For an EHT TB PPDU, its bandwidth is determined by the uplink bandwidth subfield and the uplink bandwidth extension subfield in the special user information field. The mapping relationship between B0 in the resource unit allocation subfield, B7-B1 in the resource unit allocation subfield, and PS160 can be shown in Table 3 below:

[0509] The bandwidth (band width) can be determined by the uplink bandwidth subfield and the uplink bandwidth extension subfield. N can be obtained by the formula: N = 2 × X1 + X0. The values ​​of X1 and X0 can be found in Table 4 below. Table 4 describes the conversion of logical parameters PS160 and B0 to physical parameters X1 and X0. The frequency band configuration in Table 4 refers to the order of P80, S80, and S160 in absolute frequency, representing from low frequency to high frequency from left to right. P80 represents the primary 80 MHz channel, S80 represents the secondary 80 MHz channel, and S160 represents the secondary 160 MHz channel.

[0510] Table 3

[0511] Table 4

[0512] It should be noted that the various embodiments of this application can be implemented independently or in combination, without limitation. Unless otherwise specified or there is a logical conflict, the terms and / or descriptions of the different embodiments provided in this application are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0513] It is understood that in the embodiments of the present application, the execution subject may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be performed.

[0514] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between devices. It is understandable that, in order to realize the above functions, each device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0515] The embodiments of the present application can divide the functional modules of each device according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

[0516] In the case of dividing each functional module according to each function, Figure 19 shows a communication device 190, which can execute the actions performed by the first communication device in the method shown in Figures 6 to 18 above. All relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module. The technical effects that can be obtained can be referred to the above method embodiment and will not be repeated here.

[0517] The communication device 190 may include a transmission module 1901 and a processing module 1902. For example, the communication device 190 may be a communication device, or a chip used in a communication device, or other combination devices or components having the functions of the above-mentioned transmitting end device.

[0518] When the communication apparatus 190 is a communication device, the transmission module 1901 may be a transceiver; the processing module 1902 may be a processor (or a processing circuit), such as a baseband processor, which may include one or more CPUs.

[0519] When the communication device 190 is a component having the above-mentioned transmitting end device function, the transmission module 1901 may be a radio frequency unit; the processing module 1902 may be a processor (or processing circuit), such as a baseband processor.

[0520] When the communication device 190 is a chip system, the transmission module 1901 can be the input and output interface of the chip (such as a baseband chip); the processing module 1902 can be the processor (or processing circuit) of the chip system, which can include one or more central processing units.

[0521] It should be understood that the transmission module 1901 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component; the processing module 1902 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0522] For example, the transmission module 1901 can be used to perform all transmission operations performed by the first communication device in the embodiments shown in Figures 6 to 18, and / or to support other processes of the technology described herein; the processing module 1902 is used to control the transmission module 1901 to perform all transmission operations performed by the first communication device in the embodiments shown in Figures 6 to 18, and / or to support other processes of the technology described herein.

[0523] As another possible implementation, the transmission module 1901 in FIG19 can be replaced by a transceiver, which can integrate the functions of the transmission module 1901; the processing module 1902 can be replaced by a processor, which can integrate the functions of the processing module 1902. Furthermore, the communication device 190 shown in FIG19 can also include a memory.

[0524] Alternatively, when the processing module 1902 is replaced by a processor and the transmission module 1901 is replaced by a transceiver, the communication device 190 involved in the embodiment of the present application can also be the communication device 200 shown in Figure 20. The processor can be a logic circuit 2001, and the transceiver can be an interface circuit 2002. Furthermore, the communication device 200 shown in Figure 20 can also include a memory 2003.

[0525] The embodiments of the present application also provide a computer program product, which, when executed by a computer, can implement the functions of any of the above method embodiments.

[0526] The embodiments of the present application also provide a computer program, which, when executed by a computer, can implement the functions of any of the above method embodiments.

[0527] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be an internal storage unit of the terminal (including the data sending end and / or the data receiving end) of any of the above-mentioned embodiments, such as the hard disk or memory of the terminal. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned terminal, such as a plug-in hard disk equipped on the above-mentioned terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned terminal and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0528] 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.

[0529] Furthermore, the terms "include," "comprise," and "have," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0530] It should be understood that in this application, "at least one (item)" refers to one or more. "Multiple" refers to two or more. "At least two (items)" refers to two or three and more than three. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple. “When” and “if” both mean that corresponding measures will be taken under certain objective circumstances. They do not limit the time, nor do they require any judgment action when they are implemented, nor do they mean that there are other limitations.

[0531] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0532] In this application, "sending information to ... (a terminal device)" can be understood as the destination of the information being the terminal device. This can include sending information directly or indirectly to the terminal device. "Receiving information from ... (a terminal device)" can be understood as the source of the information being the terminal device. This can include receiving information directly or indirectly from the terminal device. The information may undergo necessary processing between the source and destination, such as formatting changes, but the destination can still understand the valid information from the source.

[0533] 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.

[0534] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0535] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0536] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0537] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Claims

1. A communication method, characterized in that: include: Orthogonal frequency division multiplexing (OFDM) symbols are transmitted through a first resource unit; wherein the first resource unit includes 35 groups of subcarriers and 1 single subcarrier, and each group of subcarriers includes a continuous first subcarrier, a second subcarrier, and a third subcarrier.

2. The method according to claim 1, characterized in that When the transmission bandwidth is 40 MHz, the 40 MHz includes 4 first resource units; the n-th groups of subcarriers of the 4 first resource units are continuous, and n=1, 2, ..., 35.

3. The method according to claim 1 or 2, characterized in that The indexes of the subcarriers included in the first resource unit are: -244, -243, -242, -231, -230, -229, -218, -217, -216, -205, -204, -203, -192, -191, -190, -179, -178, -177, -166, -165, -164, -153, -152, -151, -140, -139, -138, -127, -126, -125, -114, -113, -112, -101, -100, -99, -88, -87, -86, -75, -74, -73, -62, -64, 1, -60, -48, -47, -46, -34, -33, -32, -20, -19, -18, -6, 8, 9, 10, 22, 23, 24, 36, 37, 38, 50, 51, 52, 64, 65, 66, 78, 79, 80, 92, 93, 94, 106, 107, 108, 120, 121, 122, 134, 135, 136, 148, 149, 150, 162, 163, 164, 176, 177, 178, 190, 191, 192, 204, 205, 206, 218, 219, 220, 232, 233, 234; or The indexes of the subcarriers included in the first resource unit are: -241, -240, -239, -228, -227, -226, -215, -214, -213, -202, -201, -200, -189, -188, -187, -176, -175, -174, -163, -162, -161, -150, -149, -148, -137, -136, -135, -124, -123, -122, -111, -110, -109, -98, -97, -96, -85, -84, -83, -72, -71, -70, -59, -58, or The indexes of the subcarriers included in the first resource unit are: -238, -237, -236, -225, -224, -223, -212, -211, -210, -199, -198, -197, -186, -185, -184, -173, -172, -171, -160, -159, -158, -147, -146, -145, -134, -133, -132, -121, -120, -119, -108, -107, -106, -95, -94, -93, -82, -81, -80, -69, -68, -67, -56, -55, or The indexes of the subcarriers included in the first resource unit are: -235, -234, -233, -222, -221, -220, -209, -208, -207, -196, -195, -194, -183, -182, -181, -170, -169, -168, -157, -156, -155, -144, -143, -142, -131, -130, -129, -118, -117, -116, -105, -104, -103, -92, -91, -90, -79, -78, -77, -66, -65, -64, -53, -52 , -51, -39, -38, -37, -25, -24, -23, -11, -10, -9, 4, 17, 18, 19, 31, 32, 33, 45, 46, 47, 59, 60, 61, 73, 74, 75, 87, 88, 89, 101, 102, 103, 115, 116, 117, 129, 130, 131, 143, 144, 145, 157, 158, 159, 171, 172, 173, 185, 186, 187, 199, 200, 201, 213, 214, 215, 227, 228, 229, 241, 242, 243.

4. The method according to any one of claims 1 to 3, characterized in that The first resource unit includes 4 discrete pilot subcarriers; the 4 discrete pilot subcarriers of the first resource unit are respectively located in 4 groups of subcarriers among the 35 groups of subcarriers.

5. The method according to any one of claims 1 to 4, characterized in that The four scattered pilot subcarriers of the first resource unit are respectively located in four groups of subcarriers among the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 20th, 22nd, 24th, 26th, 28th, 30th, 32nd, and 34th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the first resource unit are respectively located in four groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st and 33rd groups of subcarriers among the 35 groups of subcarriers.

6. The method according to claim 4 or 5, characterized in that The four scattered pilot subcarriers of the first resource unit are the second subcarriers in each of the four groups of subcarriers.

7. The method according to any one of claims 1 to 6, characterized in that The four discrete pilot subcarriers of the first resource unit are four discrete second subcarriers in the 2nd, 10th, 20th and 28th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the first resource unit are four discrete second subcarriers in the 4th, 12th, 22nd and 30th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the first resource unit are four discrete second subcarriers in the 6th, 14th, 24th and 32nd groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the first resource unit are four discrete second subcarriers in the 8th, 16th, 26th, and 34th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the first resource unit are four discrete second subcarriers in the first, ninth, nineteenth and twenty-seventh groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the first resource unit are four discrete second subcarriers in the third, 11th, 21st, and 29th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the first resource unit are four discrete second subcarriers in the 5th, 13th, 23rd and 31st groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the first resource unit are four discrete second subcarriers in the 7th, 15th, 25th and 33rd groups of subcarriers among the 35 groups of subcarriers.

8. The method according to any one of claims 1 to 7, characterized in that The indexes of the four scattered pilot subcarriers of the first resource unit are: -230, -126, 23, 135; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -201, -97, 54, 166; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -172, -68, 85, 197; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -143, -38, 116, 228; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -234, -130, 18, 130; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -211, -107, 43, 155; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -188, -84, 68, 180; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -165, -61, 93, 205; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -217, -113, 37, 149; or The indexes of the four scattered pilot subcarriers of the first resource unit are: -188, -84, 68, 180; or The indexes of the four discrete pilot subcarriers of the first resource unit are: -159, -55, 99, and 211.

9. The method according to any one of claims 1 to 8, characterized in that The subcarriers included in the first resource unit include two subcarriers included in the second resource units; The second resource unit includes one subcarrier in the xth group of subcarriers in the 35 groups of subcarriers, two consecutive subcarriers in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers; or, The second resource unit includes two consecutive subcarriers in the xth group of subcarriers in the 35 groups of subcarriers, one subcarrier in the yth group of subcarriers, and one subcarrier in the 35th group of subcarriers; Among them, x=1,3,5,…,31,33; y=2,4,6,…,32,34.

10. The method according to claim 9, characterized in that The second resource unit includes the first subcarrier in the xth group of subcarriers, the first subcarrier and the second subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or The second resource unit includes the second subcarrier and the third subcarrier in the xth group of subcarriers, the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

11. The method according to claim 9, characterized in that The second resource unit includes the first subcarrier and the second subcarrier in the xth group of subcarriers, the first subcarrier in the yth group of subcarriers, and the first subcarrier in the 35th group of subcarriers; or The second resource unit includes the third subcarrier in the xth group of subcarriers, the second subcarrier and the third subcarrier in the yth group of subcarriers, and the second subcarrier in the 35th group of subcarriers.

12. The method according to any one of claims 9 to 11, characterized in that: The second resource unit includes 4 discrete pilot subcarriers, and the 4 discrete pilot subcarriers of the second resource unit are 4 discrete subcarriers in 17 groups of consecutive subcarriers included in the second resource unit; the 17 groups of consecutive subcarriers include two consecutive subcarriers in the y-th group of subcarriers; or, the 17 groups of consecutive subcarriers include two consecutive subcarriers in the x-th group of subcarriers.

13. The method according to any one of claims 9 to 12, characterized in that: The four discrete pilot subcarriers included in the second resource unit are respectively located in four groups of subcarriers among the second, fourth, sixth, eighth, tenth, twelfth, fourth, sixth, sixth, twenty-second, twenty-second, twenty-fourth, twenty-sixth, twenty-eighth, thirty-second, and thirty-fourth groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the second resource unit are respectively located in four groups of subcarriers among the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 21st, 23rd, 25th, 27th, 29th, 31st and 33rd groups of subcarriers among the 35 groups of subcarriers.

14. The method according to claim 13, wherein: The four scattered pilot subcarriers of the second resource unit are the second subcarriers in each of the four groups of subcarriers.

15. The method according to any one of claims 9 to 14, characterized in that: The four discrete pilot subcarriers of the second resource unit are four discrete second subcarriers in the 2nd, 10th, 20th and 28th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the second resource unit are four discrete second subcarriers in the 4th, 12th, 22nd and 30th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the second resource unit are four discrete second subcarriers in the 6th, 14th, 24th and 32nd groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the second resource unit are four discrete second subcarriers in the 8th, 16th, 26th, and 34th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the second resource unit are four discrete second subcarriers in the first, ninth, nineteenth and twenty-seventh groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the second resource unit are four discrete second subcarriers in the 3rd, 11th, 21st and 29th groups of subcarriers in the 35 groups of subcarriers; or The four discrete pilot subcarriers of the second resource unit are four discrete second subcarriers in the 5th, 13th, 23rd and 31st groups of subcarriers in the 35 groups of subcarriers; or The four scattered pilot subcarriers of the second resource unit are four scattered second subcarriers in the 7th, 15th, 25th and 33rd groups of subcarriers among the 35 groups of subcarriers.

16. The method according to any one of claims 9 to 15, characterized in that: The indexes of the four scattered pilot subcarriers of the second resource unit are: -230, -126, 23, 135; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -201, -97, 54, 166; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -172, -68, 85, 197; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -143, -38, 116, 228; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -234, -130, 18, 130; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -211, -107, 43, 155; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -188, -84, 68, 180; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -165, -61, 93, 205; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -217, -113, 37, 149; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -188, -84, 68, 180; or The indexes of the four scattered pilot subcarriers of the second resource unit are: -159, -55, 99, and 211.

17. The method according to any one of claims 9 to 16, characterized in that: The subcarriers included in the second resource unit are the same as the subcarriers included in the two third resource units, and the third resource unit includes the odd-numbered subcarriers in the second resource unit; or, the third resource unit includes the even-numbered subcarriers in the second resource unit.

18. The method according to claim 17, characterized in that The third resource unit includes two discrete pilot subcarriers, The two discrete pilot subcarriers of the third resource unit are the two pilot subcarriers whose sorting sequence is odd among the subcarriers of the second resource unit; or, the pilot subcarriers included in the third resource unit are the two pilot subcarriers whose sorting sequence is even among the subcarriers of the second resource unit.

19. The method according to any one of claims 1 to 18, characterized in that The subcarriers included in the first resource unit are a subset of the subcarriers included in the fourth resource unit, and the fourth resource unit includes two first resource units, one 26-tone DRU, and four single subcarriers.

20. The method according to claim 19, characterized in that The fourth resource unit includes the first first resource unit, the third first resource unit, one 26-tone DRU and four single subcarriers; or The fourth resource unit includes the second first resource unit, the fourth first resource unit, one 26-tone DRU and four single subcarriers.

21. The method according to claim 19 or 20, characterized in that The fourth resource unit includes 8 scattered pilot subcarriers, and the 8 scattered pilot subcarriers of the fourth resource unit are the pilot subcarriers of the 2 first resource units included in the fourth resource unit.

22. The method according to claim 21, characterized in that The eight scattered pilot subcarriers of the fourth resource unit include four scattered pilot subcarriers of the first first resource unit and four scattered pilot subcarriers of the third first resource unit; or The eight scattered pilot subcarriers of the fourth resource unit include four scattered pilot subcarriers of the second first resource unit and four scattered pilot subcarriers of the fourth first resource unit.

23. A communication device, characterized in that: The device comprises a module or a unit for executing the communication method according to any one of claims 1 to 22.

24. A communication device, characterized in that: The communication device includes one or more transceivers, and the transceivers execute the communication method according to any one of claims 1 to 22 under the control of a processor.

25. The communication device according to claim 24, characterized in that The communication device further comprises a memory for storing the computer program or instructions.

26. A communication device, characterized in that: The communication device includes an interface circuit; the interface circuit is used to execute the communication method according to any one of claims 1 to 22 under the control of a logic circuit.

27. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions or programs, and when the computer instructions or programs are run on a computer, the communication method according to any one of claims 1 to 22 is executed.

28. 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 according to any one of claims 1 to 22 is executed.

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