Communication method, communication apparatus, chip, computer-readable storage medium, and computer program product

Abstract

The present application relates to the technical field of wireless communications, and in particular to a communication method, a communication apparatus, a chip, a computer-readable storage medium, and a computer program product. The present application provides features of 106-tone DRUs in a tone plan corresponding to a first bandwidth. For example, in each 106-tone DRU, a difference between indices of each pilot tone and an adjacent tone is greater than 13. Thus, the pilot tone can have greater transmit power than a data tone, thereby improving system performance. The present application can support IEEE protocols such as an IEEE 802.11be / Wi-Fi 7 / EHT protocol, an IEEE 802.11bn / UHR / Wi-Fi 8 protocol, an IEEE 802.15 / UWB protocol, an IEEE 802.11bf / sensing protocol, and a millimeter wave (MMW) protocol.

Description

Communication method, communication apparatus, chip, computer readable storage medium and computer program product

[0001] This application claims priority to the Chinese patent application No. 202410962071.3, filed on July 17, 2024, with the State Intellectual Property Office of China, entitled "Communication method, communication apparatus, chip, computer readable storage medium and computer program product", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and in particular to a communication method, a communication apparatus, a chip, a computer readable storage medium and a computer program product. BACKGROUND

[0003] European Telecommunications Standards Institute (ETSI) has issued regulations on 6GHz spectrum, which limits the maximum power of transmission to 23dBm (decibel-milliwatts) and the maximum power spectral density (PSD) to 10dBm / MHz (decibel-milliwatts / megahertz). The United States Federal Communications Commission has also issued regulations on 6GHz spectrum, which defines a low power indoor (LPI) communication method and strictly limits the maximum power and maximum frequency spectral density of transmission. For access points (APs), the maximum power of transmission is limited to 36dBm, and the maximum power spectral density is limited to 5dBm / MHz (decibel-milliwatts / megahertz). For stations (STAs), the maximum power of transmission is limited to 24dBm, and the maximum power spectral density is limited to -1dBm / MHz. The transmission power of a device (such as an AP and a station) is limited by both the maximum power and the maximum power spectral density. That is, the transmission power of the device cannot exceed the maximum power value, and the power spectral density of transmission cannot exceed the maximum power spectral density. Compared with the maximum power, the maximum power spectral density is more strictly limited, and the maximum power allowed for transmission is usually more limited by the power spectral density. For a station, when the bandwidth is 320MHz, the transmission power of the station reaches the limit of the specified maximum power. When the bandwidth is less than 320MHz, because of the limitation of the maximum power spectral density, the station can only transmit at a lower power (here, a power lower than the specified maximum power).

[0004] Based on this, a distributed resource unit (DRU) technology is proposed to improve the transmission power of the device. The basic idea of the DRU is to disperse the continuous subcarriers in a resource unit (RU) to the widest bandwidth possible to reduce the number of subcarriers in 1MHz, thereby increasing the transmission power of each subcarrier and further improving the total transmission power. Compared with the regular RU (rRU), the DRU occupies a larger bandwidth, so the transmission power on the DRU can be larger during uplink transmission. The DRU includes multiple subcarriers dispersed in the frequency domain, or in other words, includes multiple subcarriers with discrete indexes (or index values), or in other words, includes multiple subcarriers with non-continuous indexes.

[0005] Therefore, how to design a specific subcarrier planning has become a problem to be solved. SUMMARY

[0006] The embodiments of the present application provide a communication method, a communication device, a chip, a computer readable storage medium and a computer program product. When the DRU given by the subcarrier planning corresponding to the first bandwidth is used for data transmission, the average value of the peak to average power ratio (PAPR) of the data part of the transmission signal can be reduced, and the pilot subcarrier can have a larger transmission power than the data subcarrier, thereby improving the system performance.

[0007] In a first aspect, an embodiment of the present application provides a communication method, which is applied to a first communication device, and the first communication device is an access point (AP) or a station (STA). The method is implemented by the first communication device or a component (or a part) on the side of the first communication device, and the following is described by taking the first communication device as an example. The method comprises the following steps: the first communication device transmits or receives an orthogonal frequency division multiplexing (OFDM) symbol according to a subcarrier plan corresponding to a first bandwidth; the subcarrier plan corresponding to the first bandwidth comprises a plurality of 106-tone DRUs; in the plurality of 106-tone DRUs, the difference between the indexes of any two adjacent subcarriers in each 106-tone DRU is n times of m, m is an integer greater than 4, and n is an integer greater than or equal to 1, that is, the value range of n is an integer greater than or equal to 1. Thus, when data transmission is performed by using the 106-tone DRU included in the subcarrier plan corresponding to the first bandwidth, the average value of the PAPR of the data part of the transmission signal can be reduced; in each 106-tone DRU in the plurality of 106-tone DRUs, the difference between the indexes of each pilot subcarrier and an adjacent subcarrier (that is, a subcarrier adjacent to the pilot subcarrier in the 106-tone DRU) is greater than 13, or in each 106-tone DRU in the plurality of 106-tone DRUs, only the pilot subcarrier is included in the 1MHz range adjacent (or surrounding) to the pilot subcarrier. Thus, the pilot subcarrier can have a greater transmission power than the data subcarrier, thereby improving the system performance. The difference between the indexes of any two adjacent subcarriers in each 106-tone DRU being n times of m can be understood as: the difference between the indexes of any two adjacent subcarriers in each 106-tone DRU is any one of 1*m, 2*m, 3*m, …, wherein 1, 2, 3, …, before m are the values of n.For example, the plurality of 106-tone DRUs includes a 106-tone DRU1, which contains 106 subcarriers with indexes [-493:8:-421, -405, -389:8:-197, -181, -165:8:-45, 11:8:131, 147, 163:8:355, 371, 387:8:459], where the difference between the indexes of two adjacent subcarriers is 8 when both indexes are within [-493:8:-421]; the subcarrier with index -421 and the subcarrier with index -405 are two adjacent subcarriers, and the difference between the indexes of the subcarrier with index -421 and the subcarrier with index -405 is 16, which is 2 times of 8; the subcarrier with index -405 and the subcarrier with index -389 are two adjacent subcarriers, and the difference between the indexes of the subcarrier with index -405 and the subcarrier with index -389 is 16, which is 2 times of 8; the subcarrier with index -45 and the subcarrier with index 11 are two adjacent subcarriers, and the difference between the indexes of the subcarrier with index -45 and the subcarrier with index 11 is 56, which is 7 times of 8.

[0008] In a second aspect, an embodiment of the present application provides another communication method, which is applied to a first communication device, and the first communication device is an access point or a station. The method is implemented by the first communication device or a component at the side of the first communication device, and the following is described by taking the first communication device as an example. The method includes: sending or receiving an OFDM symbol by the first communication device according to a subcarrier plan corresponding to a first bandwidth; the subcarrier plan corresponding to the first bandwidth contains a plurality of 106-tone DRUs; in each 106-tone DRU in the plurality of 106-tone DRUs, the difference between the indexes of each pilot subcarrier and an adjacent subcarrier is greater than 13, or in each 106-tone DRU in the plurality of 106-tone DRUs, there is only the pilot subcarrier in a 1MHz range adjacent to the pilot subcarrier; thus, the pilot subcarrier can have greater transmission power than the data subcarrier, thereby improving system performance.

[0009] In a possible implementation of the first aspect or the second aspect, the plurality of 106-tone DRUs includes 106-tone DRU1 to 106-tone DRU8, and the 106-tone DRU1 to the 106-tone DRU8 satisfy one or more of the following conditions:

[0010] The 106-tone DRU1 contains four pilot subcarriers with indexes -405, -181, 147, and 371; or

[0011] The indexes of the four pilot subcarriers included in the 106-tone DRU 2 are -281, -57, 47, and 271; or,

[0012] The indexes of the four pilot subcarriers included in the 106-tone DRU 3 are -379, -155, 173, and 397; or,

[0013] The indexes of the four pilot subcarriers included in the 106-tone DRU 4 are -255, -31, 73, and 297; or,

[0014] The indexes of the four pilot subcarriers included in the 106-tone DRU 5 are -454, -246, 210, and 418; or,

[0015] The indexes of the four pilot subcarriers included in the 106-tone DRU 6 are -330, -122, 110, and 318; or,

[0016] The indexes of the four pilot subcarriers included in the 106-tone DRU 7 are -428, -220, 236, and 444; or,

[0017] The indexes of the four pilot subcarriers included in the 106-tone DRU 8 are -304, -96, 136, and 344.

[0018] In this implementation, in each of the plurality of 106-tone DRUs, the difference between the index of each pilot subcarrier and the index of the adjacent subcarrier is greater than 13, or in each of the plurality of 106-tone DRUs, only the pilot subcarrier is in the 1 MHz range adjacent to each pilot subcarrier; thus, the pilot subcarrier can have greater transmission power than the data subcarrier, thereby improving system performance.

[0019] In a possible implementation of the first aspect or the second aspect, the plurality of 106-tone DRUs includes 106-tone DRU 1 to 106-tone DRU 8, and the 106-tone DRU 1 to 106-tone DRU 8 satisfy one or more of the following:

[0020] The indexes of the 106 subcarriers included in the 106-tone DRU 1 are [-493:8:-421, -405, -389:8:-197, -181, -165:8:-45, 11:8:131, 147, 163:8:355, 371, 387:8:459]; or,

[0021] The 106-tone DRU2 contains 106 subcarriers with indices [-481:8:-297, -281, -265:8:-73, -57, -41:8:-33, 23:8:31, 47, 63:8:255, 271, 287:8:471]; or,

[0022] The 106-tone DRU3 contains 106 subcarriers with indices [-467:8:-395, -379, -363:8:-171, -155, -139:8:-19, 37:8:157, 173, 189:8:381, 397, 413:8:485]; or,

[0023] The 106-tone DRU4 contains 106 subcarriers with indices [-455:8:-271, -255, -239:8:-47, -31, -15:8:-7, 49:8:57, 73, 89:8:281, 297, 313:8:497]; or,

[0024] The 106-tone DRU5 contains 106 subcarriers with indices [-494:8:-470, -454, -438:8:-262, -246, -230:8:-46, 10:8:194, 210, 226:8:402, 418, 434:8:458]; or,

[0025] The 106-tone DRU6 contains 106 subcarriers with indices [-482:8:-346, -330, -314:8:-138, -122, -106, -98:8:-3422:8:94, 110, 126, 134:8:302, 318, 334:8:470]; or,

[0026] The 106-tone DRU7 contains 106 subcarriers with indices [-468:8:-444, -428, -412:8:-236, -220, -204:8:-20, 36:8:220, 236, 252:8:428, 444, 460:8:484]; or,

[0027] The 106-tone DRU8 contains 106 subcarriers with indices [-456:8:-320, -304, -288:8:-112, -96, -80, -72:8:-848:8:120, 136, 152, 160:8:328, 344, 360:8:496].

[0028] In the implementation, the difference between the indexes of any two adjacent subcarriers in each 106-tone DRU is m times of n, m is an integer greater than 4, and n is an integer greater than or equal to 1. Thus, when data transmission is performed on the 106-tone DRUs contained in the subcarrier plan corresponding to the first bandwidth, the average of the PAPR of the data part of the transmission signal can be reduced.

[0029] In a possible implementation of the first aspect or the second aspect, the subcarrier plan corresponding to the first bandwidth contains a plurality of 52-tone DRUs, the difference between the indexes of any two adjacent subcarriers in each 52-tone DRU is m times of n, and the difference between the indexes of at least part of the adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16.

[0030] In the implementation, the difference between the indexes of any two adjacent subcarriers in each 52-tone DRU is m times of n. Thus, when data transmission is performed on the 52-tone DRUs contained in the subcarrier plan corresponding to the first bandwidth, the average of the PAPR of the data part of the transmission signal can be reduced. The difference between the indexes of at least part of the adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16. When a delay correlation method is used for physical protocol data unit (PPDU) detection, the PPDU misdetection can be avoided.

[0031] In a possible implementation of the first aspect or the second aspect, the plurality of 52-tone DRUs include 52-tone DRU1 to 52-tone DRU16, and the 52-tone DRU1 to the 52-tone DRU16 satisfy one or more of the following conditions:

[0032] The 52-tone DRU1 contains 52 subcarriers with indexes [-477:16:-429, -405:16:-197, -157:16:-45, 11:16:123, 163:16:371, 395:16:443]; or

[0033] The 52-tone DRU2 contains 52 subcarriers with indexes [-485:16:-421, -381:16:-205, -181:16:-53, 19:16:147, 171:16:347, 387:16:451]; or

[0034] 52-tone DRU3 includes 52 subcarriers with indices [-465:16:-305, -281:16:-73, -33, 23, 63:16:271, 295:16:455]; or,

[0035] 52-tone DRU4 includes 52 subcarriers with indices [-473:16:-297, -257:16:-81, -57, -41, 31, 47, 71:16:247, 287:16:463]; or,

[0036] 52-tone DRU5 includes 52 subcarriers with indices [-451:16:-403, -379:16:-171, -131:16:-19, 37:16:149, 189:16:397, 421:16:469]; or,

[0037] 52-tone DRU6 includes 52 subcarriers with indices [-459:16:-395, -355:16:-179, -155:16:-27, 45:16:173, 197:16:373, 413:16:477]; or,

[0038] 52-tone DRU7 includes 52 subcarriers with indices [-439:16:-279, -255:16:-47, -7, 49, 89:16:297, 321:16:481]; or,

[0039] 52-tone DRU8 includes 52 subcarriers with indices [-447:16:-271, -231:16:-55, -31, -15, 57, 73, 97:16:273, 313:16:489]; or,

[0040] 52-tone DRU9 includes 52 subcarriers with indices [-478, -454:16:-262, -222:16:-46, 10:16:186, 226:16:418, 442]; or,

[0041] 52-tone DRU10 includes 52 subcarriers with indices [-486, -470, -430:16:-270, -246:16:-54, 18:16:210, 234:16:402, 434, 450]; or,

[0042] 52-tone DRU11 contains 52 subcarriers with indexes [-466:16:-354,-330:16:-138,-98:16:-34,22:16:86,126:16:318,342:16:454]; or,

[0043] 52-tone DRU12 contains 52 subcarriers with indexes [-474:16:-346,-306:16:-146,-122:16:-42,30:16:110,134:16:294,334:16:462]; or,

[0044] 52-tone DRU13 contains 52 subcarriers with indexes [-452,-428:16:-236,-196:16:-20,36:16:212,252:16:444,468]; or,

[0045] 52-tone DRU14 contains 52 subcarriers with indexes [-460,-444,-404:16:-244,-220:16:-28,44:16:236,260:16:420,460,476]; or,

[0046] 52-tone DRU15 contains 52 subcarriers with indexes [-440:16:-328,-304:16:-112,-72:16:-8,48:16:112,152:16:344,368:16:480]; or,

[0047] 52-tone DRU16 contains 52 subcarriers with indexes [-448:16:-320,-280:16:-120,-96:16:-16,56:16:136,160:16:320,360:16:488].

[0048] In this implementation, the difference between the indexes of any two adjacent subcarriers in each 52-tone DRU is n times of m, so that when the 52-tone DRU contained by the subcarrier planning corresponding to the first bandwidth is used for data transmission, the average value of the PAPR of the data part of the transmission signal can be reduced. The difference between the indexes of at least part of the adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16, so that when the PPDU is detected by using the delay correlation method, the false detection of the PPDU can be avoided.

[0049] In a possible implementation of the first aspect or the second aspect, the plurality of 52-tone DRUs includes 52-tone DRU1 to 52-tone DRU16, and the 52-tone DRU1 to 52-tone DRU16 satisfy one or more of the following conditions:

[0050] The 52-tone DRU1 includes four pilot subcarriers with indexes of -405, -293, 259, and 371; or

[0051] The 52-tone DRU2 includes four pilot subcarriers with indexes of -181, -69, 35, and 147; or

[0052] The 52-tone DRU3 includes four pilot subcarriers with indexes of -281, -169, 159, and 271; or

[0053] The 52-tone DRU4 includes four pilot subcarriers with indexes of -393, -57, 47, and 383; or

[0054] The 52-tone DRU5 includes four pilot subcarriers with indexes of -379, -267, 285, and 397; or

[0055] The 52-tone DRU6 includes four pilot subcarriers with indexes of -155, -43, 61, and 173; or

[0056] The 52-tone DRU7 includes four pilot subcarriers with indexes of -255, -143, 185, and 297; or

[0057] The 52-tone DRU8 includes four pilot subcarriers with indexes of -367, -31, 73, and 409; or

[0058] The 52-tone DRU9 includes four pilot subcarriers with indexes of -454, -342, 306, and 418; or

[0059] The 52-tone DRU10 includes four pilot subcarriers with indexes of -246, -134, 98, and 210; or

[0060] The 52-tone DRU11 includes four pilot subcarriers with indexes of -330, -234, 222, and 318; or

[0061] The 52-tone DRU12 includes four pilot subcarriers with indexes of -442, -122, 110, and 430; or

[0062] 52-tone DRU 13 contains 4 pilot subcarriers with indices -428, -316, 332 and 444; or,

[0063] 52-tone DRU 14 contains 4 pilot subcarriers with indices -220, -108, 124 and 236; or,

[0064] 52-tone DRU 15 contains 4 pilot subcarriers with indices -304, -208, 248 and 344; or,

[0065] 52-tone DRU 16 contains 4 pilot subcarriers with indices -416, -96, 136 and 456.

[0066] Each 52-tone DRU contains 4 pilot subcarriers. Each 106-tone DRU contains two 52-tone DRUs, and the pilot subcarriers in each 106-tone DRU can be selected from 8 pilot subcarriers in the two 52-tone DRUs. The 8 pilot subcarriers can be selected such that the distance between any two adjacent subcarriers is greater than 13, so that the pilot subcarriers in the 106-tone DRU can have greater power gain. The distance between two adjacent subcarriers refers to the absolute value of the difference between the indices of the two adjacent subcarriers. In this application, if not otherwise specified, adjacent subcarriers refer to adjacent subcarriers in the same DRU, and the difference between the indices of the adjacent subcarriers is greater than 1.

[0067] In a possible implementation of the first aspect or the second aspect, the subcarrier arrangement corresponding to the first bandwidth contains a 242-tone DRU 1 and / or a 242-tone DRU 2; the 242-tone DRU 1 contains 242 subcarriers with indices [-497:4:-17, 7:4:487]; and the 242-tone DRU 2 contains 242 subcarriers with indices [-487:4:-7, 17:4:497].

[0068] In a possible implementation of the first aspect or the second aspect, m is 6 or 8, so that when data transmission is performed on the 106-tone DRUs contained in the subcarrier arrangement corresponding to the first bandwidth, the average of the PAPR of the data part of the transmission signal can be reduced.

[0069] In a possible implementation of the first aspect or the second aspect, indexes of the pilot subcarriers in the plurality of 52-tone DRUs are [-454, -442, -428, -416, -405, -393, -379, -367, -342, -330, -316, -304, -293, -281, -267, -255, -246, -234, -220, -208, -181, -169, -155, -143, -134, -122, -108, -96, -69, -57, -43, -31, 35, 47, 61, 73, 98, 110, 124, 136, 147, 159, 173, 185, 210, 222, 236, 248, 259, 271, 285, 297, 306, 318, 332, 344, 371, 383, 397, 409, 418, 430, 444, 456]; each of the plurality of 52-tone DRUs includes four pilot subcarriers.

[0070] Each 52-tone DRU includes four pilot subcarriers. Each 106-tone DRU includes two 52-tone DRUs, and the pilot subcarriers in each 106-tone DRU can be selected from eight pilot subcarriers in the two 52-tone DRUs included in the 106-tone DRU. When any adjacent subcarriers with a distance greater than 13 can be selected from the eight pilot subcarriers as the pilot subcarriers of the 106-tone DRU, the pilot subcarriers of the 106-tone DRU can have greater power gain.

[0071] In a third aspect, an embodiment of the present application provides another communication method, which is applied to a first communication device, and the first communication device is an access point or a station. The method is implemented by the first communication device or a component at the side of the first communication device, and the following is described by taking the first communication device as an example. The method includes: sending or receiving an OFDM symbol by the first communication device according to a subcarrier plan corresponding to a first bandwidth; the subcarrier plan corresponding to the first bandwidth includes a plurality of 106-tone DRUs; the plurality of 106-tone DRUs include 106-tone DRU1 to 106-tone DRU8, and the 106-tone DRU1 to the 106-tone DRU8 satisfy one or more of the following conditions:

[0072] The 106-tone DRU1 includes 106 subcarriers with indices [-493:8:-421, -405, -389:8:-197, -181, -165:8:-45, 11:8:131, 147, 163:8:355, 371, 387:8:459], and the 106-tone DRU1 includes 4 pilot subcarriers with indices -405, -181, 147, and 371; or

[0073] The 106-tone DRU2 includes 106 subcarriers with indices [-481:8:-297, -281, -265:8:-73, -57, -41:8:-33, 23:8:31, 47, 63:8:255, 271, 287:8:471], and the 106-tone DRU2 includes 4 pilot subcarriers with indices -281, -57, 47, and 271; or

[0074] The 106-tone DRU3 includes 106 subcarriers with indices [-467:8:-395, -379, -363:8:-171, -155, -139:8:-19, 37:8:157, 173, 189:8:381, 397, 413:8:485], and the 106-tone DRU3 includes 4 pilot subcarriers with indices -379, -155, 173, and 397; or

[0075] The 106-tone DRU4 includes 106 subcarriers with indices [-455:8:-271, -255, -239:8:-47, -31, -15:8:-7, 49:8:57, 73, 89:8:281, 297, 313:8:497], and the 106-tone DRU4 includes 4 pilot subcarriers with indices -255, -31, 73, and 297; or

[0076] The 106-tone DRU5 includes 106 subcarriers with indices [-494:8:-470, -454, -438:8:-262, -246, -230:8:-46, 10:8:194, 210, 226:8:402, 418, 434:8:458], and the 106-tone DRU5 includes 4 pilot subcarriers with indices -454, -246, 210, and 418; or

[0077] The indexes of the 106 subcarriers contained in the 106-tone DRU 6 are [-482:8:-346, -330, -314:8:-138, -122, -106, -98:8:-3422:8:94, 110, 126, 134:8:302, 318, 334:8:470], and the indexes of the 4 pilot subcarriers contained in the 106-tone DRU 6 are -330, -122, 110 and 318; or,

[0078] The indexes of the 106 subcarriers contained in the 106-tone DRU 7 are [-468:8:-444, -428, -412:8:-236, -220, -204:8:-20, 36:8:220, 236, 252:8:428, 444, 460:8:484], and the indexes of the 4 pilot subcarriers contained in the 106-tone DRU 7 are -428, -220, 236 and 444; or,

[0079] The indexes of the 106 subcarriers contained in the 106-tone DRU 8 are [-456:8:-320, -304, -288:8:-112, -96, -80, -72:8:-848:8:120, 136, 152, 160:8:328, 344, 360:8:496], and the indexes of the 4 pilot subcarriers contained in the 106-tone DRU 8 are -304, -96, 136 and 344.

[0080] In the embodiment, the difference between the indexes of any two adjacent subcarriers in the 106-tone DRU is n times of m, m is an integer greater than 4, and n is an integer greater than or equal to 1. Therefore, when the 106-tone DRU contained in the subcarrier planning corresponding to the first bandwidth is used for data transmission, the average value of the PAPR of the data part of the transmission signal can be reduced. In the 106-tone DRU, each pilot subcarrier is the only pilot subcarrier in the 1MHz range adjacent to the pilot subcarrier. Therefore, the pilot subcarrier can have greater transmission power than the data subcarrier, thereby improving the system performance.

[0081] In a possible implementation, the subcarrier planning corresponding to the first bandwidth contains a plurality of 52-tone DRUs, and the plurality of 52-tone DRUs include 52-tone DRU1 to 52-tone DRU16, and the 52-tone DRU1 to the 52-tone DRU16 satisfy one or more of the following conditions:

[0082] 52-tone DRU1 includes 52 subcarriers with indices [-477:16:-429, -405:16:-197, -157:16:-45, 11:16:123, 163:16:371, 395:16:443]; or,

[0083] 52-tone DRU2 includes 52 subcarriers with indices [-485:16:-421, -381:16:-205, -181:16:-53, 19:16:147, 171:16:347, 387:16:451]; or,

[0084] 52-tone DRU3 includes 52 subcarriers with indices [-465:16:-305, -281:16:-73, -33, 23, 63:16:271, 295:16:455]; or,

[0085] 52-tone DRU4 includes 52 subcarriers with indices [-473:16:-297, -257:16:-81, -57, -41, 31, 47, 71:16:247, 287:16:463]; or,

[0086] 52-tone DRU5 includes 52 subcarriers with indices [-451:16:-403, -379:16:-171, -131:16:-19, 37:16:149, 189:16:397, 421:16:469]; or,

[0087] 52-tone DRU6 includes 52 subcarriers with indices [-459:16:-395, -355:16:-179, -155:16:-27, 45:16:173, 197:16:373, 413:16:477]; or,

[0088] 52-tone DRU7 includes 52 subcarriers with indices [-439:16:-279, -255:16:-47, -7, 49, 89:16:297, 321:16:481]; or,

[0089] 52-tone DRU8 includes 52 subcarriers with indices [-447:16:-271, -231:16:-55, -31, -15, 57, 73, 97:16:273, 313:16:489]; or,

[0090] 52-tone DRU9 includes 52 subcarriers with indices [-478, -454:16:-262, -222:16:-46, 10:16:186, 226:16:418, 442]; or,

[0091] 52-tone DRU10 includes 52 subcarriers with indices [-486, -470, -430:16:-270, -246:16:-54, 18:16:210, 234:16:402, 434, 450]; or,

[0092] 52-tone DRU11 includes 52 subcarriers with indices [-466:16:-354, -330:16:-138, -98:16:-34, 22:16:86, 126:16:318, 342:16:454]; or,

[0093] 52-tone DRU12 includes 52 subcarriers with indices [-474:16:-346, -306:16:-146, -122:16:-42, 30:16:110, 134:16:294, 334:16:462]; or,

[0094] 52-tone DRU13 includes 52 subcarriers with indices [-452, -428:16:-236, -196:16:-20, 36:16:212, 252:16:444, 468]; or,

[0095] 52-tone DRU14 includes 52 subcarriers with indices [-460, -444, -404:16:-244, -220:16:-28, 44:16:236, 260:16:420, 460, 476]; or,

[0096] 52-tone DRU15 includes 52 subcarriers with indices [-440:16:-328, -304:16:-112, -72:16:-8, 48:16:112, 152:16:344, 368:16:480]; or,

[0097] 52-tone DRU16 includes 52 subcarriers with indices [-448:16:-320, -280:16:-120, -96:16:-16, 56:16:136, 160:16:320, 360:16:488].

[0098] In the implementation, the difference between the indexes of any two adjacent subcarriers in each 52-tone DRU is n times of m, so that the average of the PAPR of the data part of the transmission signal can be reduced when the 52-tone DRUs contained in the subcarrier plan corresponding to the first bandwidth are used for data transmission. The difference between the indexes of at least part of the adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16, so that when the PPDU detection is performed by using the delay correlation method, the PPDU false detection can be avoided.

[0099] In a possible implementation, the subcarrier plan corresponding to the first bandwidth contains a plurality of 52-tone DRUs, and the plurality of 52-tone DRUs include 52-tone DRU1 to 52-tone DRU16, which satisfy one or more of the following conditions:

[0100] The indexes of the four pilot subcarriers contained in the 52-tone DRU1 are -405, -293, 259 and 371; or,

[0101] The indexes of the four pilot subcarriers contained in the 52-tone DRU2 are -181, -69, 35 and 147; or,

[0102] The indexes of the four pilot subcarriers contained in the 52-tone DRU3 are -281, -169, 159 and 271; or,

[0103] The indexes of the four pilot subcarriers contained in the 52-tone DRU4 are -393, -57, 47 and 383; or,

[0104] The indexes of the four pilot subcarriers contained in the 52-tone DRU5 are -379, -267, 285 and 397; or,

[0105] The indexes of the four pilot subcarriers contained in the 52-tone DRU6 are -155, -43, 61 and 173; or,

[0106] The indexes of the four pilot subcarriers contained in the 52-tone DRU7 are -255, -143, 185 and 297; or,

[0107] The indexes of the four pilot subcarriers contained in the 52-tone DRU8 are -367, -31, 73 and 409; or,

[0108] The indexes of the four pilot subcarriers contained in the 52-tone DRU9 are -454, -342, 306 and 418; or,

[0109] The indexes of the four pilot subcarriers included in the 52-tone DRU 10 are -246, -134, 98, and 210; or,

[0110] The indexes of the four pilot subcarriers included in the 52-tone DRU 11 are -330, -234, 222, and 318; or,

[0111] The indexes of the four pilot subcarriers included in the 52-tone DRU 12 are -442, -122, 110, and 430; or,

[0112] The indexes of the four pilot subcarriers included in the 52-tone DRU 13 are -428, -316, 332, and 444; or,

[0113] The indexes of the four pilot subcarriers included in the 52-tone DRU 14 are -220, -108, 124, and 236; or,

[0114] The indexes of the four pilot subcarriers included in the 52-tone DRU 15 are -304, -208, 248, and 344; or,

[0115] The indexes of the four pilot subcarriers included in the 52-tone DRU 16 are -416, -96, 136, and 456.

[0116] Each 52-tone DRU includes four pilot subcarriers. Each 106-tone DRU includes two 52-tone DRUs, and the pilot subcarriers in each 106-tone DRU can be selected from the eight pilot subcarriers in the two 52-tone DRUs included in the 106-tone DRU. When any adjacent subcarriers with a distance greater than 13 can be selected from the eight pilot subcarriers as the pilot subcarriers of the 106-tone DRU, the pilot subcarriers of the 106-tone DRU can have greater power gain.

[0117] In a possible implementation, the first bandwidth corresponds to a subcarrier arrangement including a 242-tone DRU 1 and / or a 242-tone DRU 2; the 242-tone DRU 1 includes 242 subcarriers with indexes [-497:4:-17, 7:4:487]; and the 242-tone DRU 2 includes 242 subcarriers with indexes [-487:4:-7, 17:4:497].

[0118] In a fourth aspect, an embodiment of the present application provides a communication apparatus, which has functions of implementing the behaviors in the method embodiments of the first aspect. The communication apparatus can be an access point, or a component (for example, a processor, a chip, or a chip system, etc.) of the access point, or a logic module or software capable of realizing the functions of the access point in whole or in part. Alternatively, the communication apparatus can be a station, or a component (for example, a processor, a chip, or a chip system, etc.) of the station, or a logic module or software capable of realizing the functions of the station in whole or in part. The functions of the communication apparatus can be realized by hardware, or by hardware executing corresponding software, and the hardware or software includes one or more modules or units corresponding to the above functions. In a possible implementation manner, the communication apparatus includes a transceiver module and a processing module, where: the processing module is configured to generate an OFDM symbol according to a subcarrier plan corresponding to a first bandwidth; the transceiver module is configured to send or output the OFDM symbol on the first bandwidth; or the transceiver module is configured to receive or input the OFDM symbol; the processing module is configured to parse the OFDM symbol according to the subcarrier plan corresponding to the first bandwidth; the subcarrier plan corresponding to the first bandwidth includes a plurality of 106-tone DRUs; in the plurality of 106-tone DRUs, the difference between the indexes of any two adjacent subcarriers in each 106-tone DRU is n times of m, m is an integer greater than 4, and n is an integer greater than or equal to 1; in each 106-tone DRU in the plurality of 106-tone DRUs, the difference between the index of each pilot subcarrier and the index of an adjacent subcarrier (that is, a subcarrier adjacent to the pilot subcarrier in the 106-tone DRU) is greater than 13, or in each 106-tone DRU in the plurality of 106-tone DRUs, there is only the pilot subcarrier in a 1MHz range adjacent to the pilot subcarrier.

[0119] The possible implementation manners of the communication apparatus of the fourth aspect can refer to the various possible implementation manners of the first aspect.

[0120] The technical effects brought by the various possible implementation manners of the fourth aspect can refer to the introduction of the technical effects of the various possible implementation manners of the first aspect.

[0121] In a fifth aspect, an embodiment of the present application provides another communication apparatus, which has the function of implementing the behavior in the method embodiment of the second aspect. The communication apparatus can be an access point, or a component (for example, a processor, a chip, or a chip system, etc.) of the access point, or a logic module or software that can realize the function of the access point in whole or in part. Alternatively, the communication apparatus can be a station, or a component (for example, a processor, a chip, or a chip system, etc.) of the station, or a logic module or software that can realize the function of the station in whole or in part. The function of the communication apparatus can be realized by hardware, or by hardware executing corresponding software, and the hardware or software includes one or more modules or units corresponding to the above functions. In a possible implementation manner, the communication apparatus includes a transceiver module and a processing module, wherein: the processing module is configured to generate an OFDM symbol according to a subcarrier plan corresponding to a first bandwidth; the transceiver module is configured to send or output the OFDM symbol on the first bandwidth; or the transceiver module is configured to receive or input the OFDM symbol; the processing module is configured to parse the OFDM symbol according to the subcarrier plan corresponding to the first bandwidth; the subcarrier plan corresponding to the first bandwidth includes a plurality of 106-tone DRUs; in each of the plurality of 106-tone DRUs, each pilot subcarrier has a difference greater than 13 from the index of an adjacent subcarrier, or in each of the plurality of 106-tone DRUs, only the pilot subcarrier is present within a 1MHz range adjacent to the pilot subcarrier.

[0122] The possible implementation manners of the communication apparatus of the fifth aspect can refer to the various possible implementation manners of the second aspect.

[0123] The technical effects brought by the various possible implementation manners of the fifth aspect can refer to the introduction of the technical effects of the various possible implementation manners of the second aspect.

[0124] In a sixth aspect, an embodiment of the present application provides another communication apparatus having functions to implement the behaviors in the method embodiments of the third aspect. The communication apparatus can be an access point, or a component (for example, a processor, a chip, or a chip system, etc.) of the access point, or a logic module or software capable of implementing the functions of the access point in whole or in part. Alternatively, the communication apparatus can be a station, or a component (for example, a processor, a chip, or a chip system, etc.) of the station, or a logic module or software capable of implementing the functions of the station in whole or in part. The functions of the communication apparatus can be implemented by hardware, or by hardware executing corresponding software, and the hardware or software includes one or more modules or units corresponding to the above functions. In a possible implementation, the communication apparatus includes a transceiver module and a processing module, where: the processing module is configured to generate an OFDM symbol according to a subcarrier plan corresponding to a first bandwidth; the transceiver module is configured to send or output the OFDM symbol on the first bandwidth; or the transceiver module is configured to receive or input the OFDM symbol; the processing module is configured to parse the OFDM symbol according to the subcarrier plan corresponding to the first bandwidth; the subcarrier plan corresponding to the first bandwidth includes a plurality of 106-tone DRUs; the plurality of 106-tone DRUs include 106-tone DRU1 to 106-tone DRU8, and the 106-tone DRU1 to the 106-tone DRU8 satisfy one or more of the following conditions:

[0125] The 106-tone DRU1 includes 106 subcarriers with indexes [-493:8:-421, -405, -389:8:-197, -181, -165:8:-45, 11:8:131, 147, 163:8:355, 371, 387:8:459], and the 106-tone DRU1 includes 4 pilot subcarriers with indexes -405, -181, 147, and 371; or

[0126] The 106-tone DRU2 includes 106 subcarriers with indexes [-481:8:-297, -281, -265:8:-73, -57, -41:8:-33, 23:8:31, 47, 63:8:255, 271, 287:8:471], and the 106-tone DRU2 includes 4 pilot subcarriers with indexes -281, -57, 47, and 271; or

[0127] 106-tone DRU3 includes 106 subcarriers with indices [-467:8:-395, -379, -363:8:-171, -155, -139:8:-19, 37:8:157, 173, 189:8:381, 397, 413:8:485], and 106-tone DRU3 includes 4 pilot subcarriers with indices -379, -155, 173, and 397; or

[0128] 106-tone DRU4 includes 106 subcarriers with indices [-455:8:-271, -255, -239:8:-47, -31, -15:8:-7, 49:8:57, 73, 89:8:281, 297, 313:8:497], and 106-tone DRU4 includes 4 pilot subcarriers with indices -255, -31, 73, and 297; or

[0129] 106-tone DRU5 includes 106 subcarriers with indices [-494:8:-470, -454, -438:8:-262, -246, -230:8:-46, 10:8:194, 210, 226:8:402, 418, 434:8:458], and 106-tone DRU5 includes 4 pilot subcarriers with indices -454, -246, 210, and 418; or

[0130] 106-tone DRU6 includes 106 subcarriers with indices [-482:8:-346, -330, -314:8:-138, -122, -106, -98:8:-3422:8:94, 110, 126, 134:8:302, 318, 334:8:470], and 106-tone DRU6 includes 4 pilot subcarriers with indices -330, -122, 110, and 318; or

[0131] 106-tone DRU7 includes 106 subcarriers with indices [-468:8:-444, -428, -412:8:-236, -220, -204:8:-20, 36:8:220, 236, 252:8:428, 444, 460:8:484], and 106-tone DRU7 includes 4 pilot subcarriers with indices -428, -220, 236, and 444; or

[0132] The indexes of 106 subcarriers included in the 106-tone DRU8 are [-456:8:-320, -304, -288:8:-112, -96, -80, -72:8:-848:8:120, 136, 152, 160:8:328, 344, 360:8:496], and the indexes of 4 pilot subcarriers included in the 106-tone DRU8 are -304, -96, 136, and 344.

[0133] The possible implementation manners of the communication apparatus of the sixth aspect can refer to the possible implementation manners of the third aspect.

[0134] The technical effects brought by the possible implementation manners of the sixth aspect can refer to the introduction of the technical effects of the possible implementation manners of the third aspect.

[0135] In the seventh aspect, an embodiment of the present application provides another communication apparatus, which comprises one or more processors configured to process data and / or signaling so that the method of any one of the first aspect to the third aspect is implemented.

[0136] Optionally, the communication apparatus further comprises a memory configured to store computer programs or instructions, which, when executed by the processor, cause the communication apparatus to perform the method of any one of the first aspect to the third aspect. Exemplarily, the communication apparatus can be a chip, the processor can be a processing unit in the chip, and the memory can be a random access memory or a cache in the chip.

[0137] In the embodiments of the present application, in the process of executing the above method, the process of transmitting information (or signal) in the above method can be understood as the process of outputting information based on the computer programs or instructions of the processor. When the information is outputted, the processor outputs the information to the transceiver so as to be transmitted by the transceiver. After the information is outputted by the processor, the information can be further processed and then reaches the transceiver. Similarly, when the processor receives the inputted information, the transceiver receives the information and inputs the information to the processor. Furthermore, after the transceiver receives the information, the information can be further processed and then inputted to the processor.

[0138] For the transmitting and / or receiving operations of the processor, if there is no special description, or if it does not contradict the actual role or inherent logic in the related description, it can be generally understood as output based on the computer programs or instructions of the processor.

[0139] In implementation process, the processor can be a processor specially used for executing the methods, or a processor executing computer programs or instructions in memory to execute the methods, such as a general processor and the like. For example, the processor can also be used to execute programs stored in the memory, when the programs are executed, the communication apparatus executes the methods shown in the first aspect or any possible implementation manner of the first aspect.

[0140] In a possible implementation manner, the memory is located outside the communication apparatus. In a possible implementation manner, the memory is located inside the communication apparatus.

[0141] In a possible implementation manner, the processor and the memory can also be integrated into one device, that is, the processor and the memory can also be integrated together.

[0142] In a possible implementation manner, the communication apparatus further includes a transceiver, which is configured to receive a signal or transmit a signal, and the like.

[0143] In an eighth aspect, the present application provides another communication apparatus, which includes a logic circuit (or processing circuit) and an interface (or interface circuit), the interface is configured to input and / or output data; the logic circuit is configured to execute the method in any one of the first aspect to the third aspect.

[0144] In a ninth aspect, the present application provides a computer readable storage medium, which is configured to store a computer program, when the computer program is executed, the computer program makes a computer execute the method in any one of the first aspect to the third aspect.

[0145] In a tenth aspect, the present application provides a computer program product, when the computer program product is executed, the computer program product makes a computer execute the method in any one of the first aspect to the third aspect. For example, the computer program product includes a computer program, when the computer program is executed, the computer program makes a computer execute the method in any one of the first aspect to the third aspect.

[0146] In an eleventh aspect, the present application provides a chip, which includes a communication interface and a processor; the communication interface is configured to transceive signals of the chip; the processor is configured to execute computer programs or instructions, so that the chip executes the method in any one of the first aspect to the third aspect. BRIEF DESCRIPTION OF DRAWINGS

[0147] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0148] FIG. 2a is a schematic diagram of subcarrier distribution and RU distribution of 20MHz according to an embodiment of the present application;

[0149] FIG. 2b is a schematic diagram of subcarrier distribution and RU distribution of 40MHz according to an embodiment of the present application;

[0150] FIG. 2c is a schematic diagram of subcarrier distribution and RU distribution of 80MHz according to an embodiment of the present application;

[0151] FIG. 3a is a schematic diagram of a flow of uplink multi-user transmission according to an embodiment of the present application;

[0152] FIG. 3b is a schematic diagram of frame format of EHT variant user information field according to an embodiment of the present application;

[0153] FIG. 4 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0154] FIG. 5 is a schematic diagram of a 1MHz range of pilot subcarriers adjacent to each other in a 106-tone DRU according to an embodiment of the present application;

[0155] FIG. 6 is a schematic diagram of distances corresponding to each subcarrier available to a station or access point under 80MHz bandwidth according to an embodiment of the present application;

[0156] FIG. 7 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0157] FIG. 8 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0158] FIG. 9a, FIG. 9b, FIG. 9c and FIG. 9d are simulation comparison result diagrams according to the present application;

[0159] FIG. 10 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0160] FIG. 11 is a schematic diagram of another structure of a communication apparatus according to an embodiment of the present application;

[0161] FIG. 12 is a schematic diagram of another structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0162] The terms "first" and "second" and the like in the description, claims and drawings of the present application merely mean different objects and do not imply a particular order or sequence. It can be understood that various numbers involved in the embodiments of the present application are only for the convenience of differentiation and do not limit the scope of the embodiments of the present application. The size of the serial numbers of the processes involved in the embodiments of the present application does not mean the order of execution, and the execution order of the processes should be determined according to their functions and inherent logic. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device, etc. including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, etc., or can optionally include other steps or units inherent to the process, method, product or device, etc.

[0163] "Embodiments" mentioned herein means that the specific features, structures or characteristics described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments. In this application, the naming of messages is only for the purpose of distinguishing different messages and should not be understood as a limitation. That is, the name of any message in this application can be replaced by other names, and this application is not limited.

[0164] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to be limiting to the present application. As used in the specification and the appended claims of the present application, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or" as used herein refer to and encompass any or all possible combinations of one or more of the associated listed items. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist, where A and B can be singular or plural. The term "plurality" used in the present application means two or more. In the literal description of the present application, the character " / ", generally indicates that the associated objects before and after are in an "or" relationship.

[0165] In the embodiments of the present application, "A corresponds to B" means that A and B have a corresponding relationship, and B can be determined according to A. However, it should also be understood that determining (or generating) B according to (or based on) A does not mean that B is determined (or generated) only according to (or based on) A, but B can also be determined (or generated) according to (or based on) A and / or other information.

[0166] In the present application, indication includes direct indication (also known as explicit indication) and implicit indication. Among them, direct indication of information A means including the information A; implicit indication of information A means indicating the information A through the correspondence between the information A and information B and the direct indication of information B. Among them, the correspondence between the information A and information B can be predefined, pre-stored, pre-burned, or pre-configured.

[0167] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, and also includes indirect receiving from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be carried out between devices, such as between network devices and terminal devices, or can be carried out within a device, such as between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0168] The following introduces the system related to the embodiments of the present application.

[0169] The technical solutions provided in the embodiments of the present application can be applied to a wireless local area network (WLAN) system, such as Wi-Fi and the like. The technical solutions provided in the embodiments of the present application can be applicable to the Institute of Electrical and Electronics Engineers (IEEE) 802.11 series of protocols (or standards), for example, the 802.11be protocol, the 802.11bn protocol (or Wi-Fi 8, also referred to as ultra high reliability (UHR) or ultra high reliability and throughput (UHRT), and the like), or a next-generation protocol of the 802.11bn protocol or a protocol supporting ambient power (AMP), and the like, which are not listed one by one. The technical solutions provided in the embodiments of the present application can also be applied to a wireless personal area network (WPAN) based on millimeter wave (MMW) and ultra wideband (UWB) technology, and the like. The technical solutions provided in the embodiments of the present application can be applicable to the IEEE 802.15 series of protocols, for example, the 802.15.4a protocol, the 802.15.4z protocol or the 802.15.4ab protocol, or a future generation UWB WPAN protocol, and the like, which are not listed one by one. The technical solutions provided in the embodiments of the present application can also be applied to a spark link or nearlink protocol. The technical solutions provided in the embodiments of the present application can also be applied to a communication system, for example, can be an internet of things (IoT) system, a vehicle-to-everything (V2X) system (X can represent any thing), a device-to-device (D2D) system, a narrow band IoT (NB-IoT) system, a long term evolution (LTE) system, a 5th-generation (5G) communication system, and a new communication system to be generated in future communication development, and the like. For example, the V2X can include vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) or vehicle-to-network (V2N) communication, and the like.

[0170] The WLAN system can provide high-rate and low-latency transmission. As the WLAN application scenarios evolve, the WLAN system will be applied to more scenarios or industries, such as the Internet of Things industry, the Internet of Vehicles industry, the banking industry, enterprise offices, stadiums, exhibition halls, concert halls, hotel rooms, dormitories, wards, classrooms, supermarkets, squares, streets, manufacturing workshops, and warehouses. Of course, the devices (such as access points or stations) that support WLAN communication or sensing can be sensor nodes in smart cities (such as smart water meters, smart electricity meters, and smart air detection nodes), smart devices in smart homes (such as smart cameras, projectors, display screens, televisions, sound systems, refrigerators, washing machines, and the like), nodes in the Internet of Things, entertainment terminals (such as augmented reality (AR) and virtual reality (VR) wearable devices), smart devices in smart offices (such as printers, projectors, amplifiers, sound systems, and the like), Internet of Vehicles devices in the Internet of Vehicles, infrastructure in daily life scenarios (such as vending machines, self-service navigation stations in supermarkets, self-service checkout devices, self-service ordering machines, and the like), and devices in large sports and music venues.

[0171] Although the embodiments of the present application mainly take WLAN as an example, especially the network applying IEEE 802.11 series protocol. The various aspects involved in the embodiments of the present application can be extended to other networks using various protocols. For example, Bluetooth, high performance radio LAN (HIPERLAN) (a wireless protocol similar to IEEE 802.11 protocol) and wide area network (WAN) or other now known or later developed networks.

[0172] In a possible implementation, the method provided by the embodiments of the present application can be implemented by a communication device in a communication system. For example, the communication device can be an access point (AP) or a station (STA).

[0173] The AP is a device with wireless communication function, which supports communication or sensing or energy transmission by using WLAN protocol, has the function of communication or sensing with other devices (such as non-AP STA or other access points) in the WLAN network or energy transmission, and of course, can also have the function of communication or sensing or energy transmission with other devices. Alternatively, the access point is equivalent to a bridge connecting wired and wireless networks, and the main function is to connect various wireless network clients together and then access the wireless network to the Ethernet. In the WLAN system, the access point can be referred to as an access point station (AP STA). The device with wireless communication function can be a whole device, or a chip, processing system or functional module installed in the whole device, and the device installed with the chip or processing system or functional module can realize the method and function of the embodiments of the present application under the control of the chip or processing system or functional module. The AP in the embodiments of the present application is a device providing services for non-AP STA, which can support 802.11 series protocol or subsequent protocol, etc. For example, the access point can be an access point for terminals (such as mobile phones) to enter wired (or wireless) networks, mainly deployed in homes, buildings and parks, with a typical coverage radius of tens of meters to hundreds of meters, and of course, can also be deployed outdoors. For another example, the AP can be a communication server, a router, a switch, a network bridge and the like. The AP can include various forms of macro base stations, micro base stations, relay stations and the like. Of course, the AP can also be a chip or processing system or module in the above various forms of devices, so as to realize the method and function of the embodiments of the present application.

[0174] The STA is a device with wireless communication function, which supports communication or sensing or energy transmission using WLAN protocol, and has the ability to communicate or sense or energy transmission with other non-AP STAs or access points in the WLAN network. In the WLAN system, the station can be referred to as a non-access point station (non-AP STA). For example, the STA is any user communication device that allows a user to communicate or sense or energy transmission with an AP and then communicate with a WLAN. The device with wireless communication function can be a complete device, or a chip or processing system or functional module installed in the complete device. The device installed with the chip or processing system or functional module can realize the method and function of the embodiments of the present application under the control of the chip or processing system or functional module. For example, the STA can be a wireless communication chip, a wireless sensor or a wireless communication terminal, and can also be referred to as a user. For another example, the STA can be a mobile phone supporting Wi-Fi communication function, a tablet computer supporting Wi-Fi communication function, a set-top box supporting Wi-Fi communication function, a smart television supporting Wi-Fi communication function, a smart wearable device supporting Wi-Fi communication function, a vehicle-mounted communication device supporting Wi-Fi communication function, and a computer supporting Wi-Fi communication function. Of course, the STA can also be a chip or processing system or module in the above various forms of devices, thereby realizing the method and function of the embodiments of the present application.

[0175] For example, the communication system to which the method provided by the embodiments of the present application can be applied can include an access point and a station. For example, the embodiments of the present application can be applied to the scenario of communication or sensing between an AP and a STA, between an AP and an AP, or between a STA and a STA in a WLAN, which is not limited by the embodiments of the present application. Optionally, the AP can communicate or sense with a single STA, or the AP can simultaneously communicate or sense with multiple STAs. Specifically, the communication or sensing between the AP and the multiple STAs can be divided into downlink transmission in which the AP simultaneously sends signals to multiple STAs, and uplink transmission in which multiple STAs send signals to the AP. The communication or sensing between the AP and the STA, between the AP and the AP, and between the STA and the STA can support a WLAN communication protocol, which can include IEEE 802.11 series of protocols, such as 802.11bn protocol, and of course also applies to protocols after 802.11bn.

[0176] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application. The communication system can include one or more APs and one or more STAs. Two access points, e.g., AP1 and AP2, and three stations, e.g., STA1, STA2 and STA3, are shown in FIG. 1. As an example, the method provided by the embodiments of the present application can be applied to data communication or sensing or energy transfer between an AP and one or more STAs, e.g., the communication or sensing or energy transfer between AP1 and STA1 shown in FIG. 1, or the communication or sensing or energy transfer between AP1 and STA1 and STA2 shown in FIG. 1. As another example, the method provided by the embodiments of the present application can be applied to communication between APs, e.g., the communication or sensing or energy transfer between AP1 and AP2 shown in FIG. 1. As yet another example, the method provided by the embodiments of the present application can be applied to communication or sensing or energy transfer between STAs, e.g., the communication or sensing or energy transfer between STA2 and STA3 shown in FIG. 1.

[0177] The STA is a mobile phone and the AP is a router in FIG. 1 as an example, which does not limit the types of AP and STA in the embodiments of the present application. Meanwhile, the number of APs and STAs shown in FIG. 1 is only an example, and the number of APs or STAs can be more or less in specific implementation, which is not limited in the embodiments of the present application.

[0178] From different perspectives of transmitting and receiving OFDM symbols, the first communication device shown below can be understood as a communication device for transmitting OFDM symbols, and the second communication device can be understood as a communication device for receiving OFDM symbols. Alternatively, the first communication device can also be referred to as a transmitting end, and the second communication device can also be referred to as a receiving end.

[0179] From the perspective of different devices, as an example, the first communication device and the second communication device can be Wi-Fi chips or functional modules or processing systems, etc. arranged in different Wi-Fi devices. As another example, the first communication device can be an AP, and the second communication device can be a non-AP STA. As yet another example, the first communication device and the second communication device can both be non-AP STAs or both be APs. As yet another example, the first communication device can be a non-AP STA, and the second communication device can be an AP. As yet another example, at least one of the first communication device and the second communication device can be a multi-link device (MLD), etc. The embodiments of the present application are not listed one by one. For example, the MLD refers to a device that has multiple stations (such as APs or non-AP STAs) working on different frequency bands or channels at the same time. The multi-link device includes multiple affiliated stations, which can be physical stations or logical stations, and each station can work on a link or a frequency band or a channel, etc. The above-mentioned affiliated stations can be APs or non-AP STAs. The multi-link device (such as a non-AP MLD or an AP MLD) can be a communication device with wireless communication function. The communication device can be a whole machine device, or a chip or processing system or module installed in the whole machine device, etc. The device installed with the chip or processing system or module can realize the method and function of the embodiments of the present application under the control of the chip or processing system or module. The multi-link device can comply with the 802.11 series protocol to realize wireless communication, so as to realize communication with other devices. The other devices shown here can be multi-link devices or not. The frequency band in which the multi-link device works can include but is not limited to sub 1GHz, 2.4GHz, 5GHz, 6GHz, etc. which are not listed one by one here.

[0180] The embodiments of the present application describe the method provided by the embodiments of the present application from the perspective of the first communication device and the second communication device, but the first communication device and the second communication device can also forward the signal in the process of transmitting the signal through other devices, such as through a forwarding device to forward the signal between the first communication device and the second communication device. The embodiments of the present application do not limit other devices other than the first communication device and the second communication device.

[0181] The following introduces the terms or names related to the embodiments of the present application.

[0182] 1. Resource unit (RU) based subcarrier planning (tone plan)

[0183] As an example, when the bandwidth is 20MHz, the whole bandwidth (i.e., 20MHz) can be composed of one whole 242-tone RU, or various combinations of 26-tone RU, 52-tone RU, 106-tone RU. FIG. 2a is a schematic diagram of subcarrier distribution and RU distribution of 20MHz according to an embodiment of the present application. As shown in FIG. 2a, 20MHz can include 9 26-tone RUs, or include 4 52-tone RUs, or include 2 106-tone RUs, or include 1 242-tone. The subcarrier planning can also be referred to as subcarrier distribution.

[0184] A 26-tone RU is an RU including 26 subcarriers, a 52-tone RU is an RU including 52 subcarriers, a 106-tone RU is an RU including 106 subcarriers, and a 242-tone RU is an RU including 242 subcarriers, and so on. Each RU can include data subcarriers and pilot subcarriers. For example, the data subcarriers can be used to carry data information, and the pilot subcarriers can be used for phase offset and / or frequency offset estimation, etc. In addition to the RUs, the above-mentioned 20MHz bandwidth can also include at least one of the following: one or more guard subcarriers, one or more null subcarriers, one or more direct current (DC) subcarriers. The subcarrier range included in each RU can refer to the relevant protocol, which will not be described one by one here. The description of the RU or the subcarrier here is also applicable to other bandwidths shown below, which will not be described hereinafter. The description of the subcarrier here is also applicable to the description of the DRU below, which will not be described hereinafter.

[0185] As another example, when the bandwidth is 40MHz, the whole bandwidth (i.e., 40MHz) can be composed of one whole 484-tone RU, or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU. The whole bandwidth is roughly equivalent to a copy of the subcarrier planning of 20MHz. As shown in FIG. 2b, 40MHz can include 18 26-tone RUs, or include 8 52-tone RUs, or include 4 106-tone RUs, or include 2 242-tone RUs, or include 1 484-tone RU.

[0186] As another example, when the bandwidth is 80MHz, the entire bandwidth (i.e., 80MHz) can be composed of one whole 996-tone RU, or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU. As shown in FIG. 2c, 80MHz can include 36 26-tone RUs, or include 16 52-tone RUs, or include 8 106-tone RUs, or include 4 242-tone RUs, or include 2 484-tone RUs, or include 1 996-tone RU. Where 484L, 484R represent the left half and the right half of a 484-tone RU, respectively, containing 242 subcarriers, which is another representation of 484+5DC. For example, with the subcarrier range of a 484-tone RU being [-500:-12], “484L” is the low frequency part relative to the frequency center of the 484-tone RU, i.e., [-500:-259], and “484R” is the high frequency part relative to the frequency center of the 484-tone RU, i.e., [-253:-12]. Similarly, for example, with the subcarrier range of a 484-tone RU being [12:500], “484L” is [12:253], and “484R” is [259:500]. The same applies to other combinations. As shown in FIG. 2c, a 996-tone RU can be split into two 484-tone RUs, each 484-tone RU can be split into two 242-tone RUs, each 242-tone RU can be split into two 106-tone RUs and one 26-tone RU, each 106-tone RU can be split into two 52-tone RUs, and each 52-tone RU can be split into two 26-tone RUs.

[0187] In this application, [a:b] can refer to all integers from a to b (a and b are also integers), i.e., a, (a+1), (a+2), (a+3), …, b; the following will not be repeated. For example, [259:500] represents 259, 260, 261, 262, …, 498, 499, 500. For another example, [-500:-259] represents -500, -499, -498, -497, …, -260, -259.

[0188] As another example, when the bandwidth is 160MHz or 80MHz+80MHz (i.e., two discrete 80MHz), the entire bandwidth can be seen as two 80MHz subcarrier distributions of copies, e.g., the entire bandwidth can be composed of one entire 2*996-tone RU, or various combinations of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU, 996-tone RU. When the bandwidth is 320MHz, the entire bandwidth can be seen as four 80MHz subcarrier distributions of copies. Here, we do not list them one by one.

[0189] In the above various subcarrier plans, in the unit of 242-tone RU (i.e., 20MHz), the leftmost of FIGS. 2a-2c can be the lowest frequency, and the rightmost of FIGS. 2a-2c can be the highest frequency. From left to right, the 242-tone RUs can be labeled as 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 13th, 14th, 15th, and 16th. nd th With a bandwidth of 320MHz as an example, the data field in a wireless frame can occupy up to 16 242-tone RUs, i.e., in the data field, up to 16 242-tone RUs can be one-to-one corresponding to 16 20MHz channels from low to high in frequency.

[0190] Generally, one STA can be allocated multiple RUs, i.e., multiple RUs can be allocated to one STA, and thus the 802.11be protocol supports multiple resource units (MRU). In other words, in addition to the above-mentioned several RUs, the 802.11be protocol also includes some MRUs. For example, one 52-tone RU and one 26-tone RU form a 52+26-tone MRU. As another example, one 106-tone RU and one 26-tone RU form a 106+26-tone MRU. As another example, one 996-tone RU and one 484-tone RU form a 996+484-tone MRU. As another example, two 996-tone RUs and one 484-tone RU form a 2*996+484-tone MRU. As another example, three 996-tone RUs form a 3*996-tone MRU. As another example, three 996-tone RUs and one 484-tone RU form a 3*996+484-tone MRU. The symbol “*” in this application means “multiply” or “times”.

[0191] ​At the bandwidth level, when the subcarrier spacing is 78.125 KHz, a 26-tone RU can approximately correspond to 2 MHz (i.e., 26*78.125 KHz = 2031.25 KHz ≈ 2 MHz), a 52-tone RU approximately corresponds to 4 MHz, a 106-tone RU approximately corresponds to 8 MHz, and a 242-tone RU approximately corresponds to 20 MHz. Other RU sizes can be similarly scaled by addition or multiplication, and the present application will not be repeated here.

[0192] The above RU can be referred to as a regular RU (rRU) or a contiguous RU. The contiguous RU in the present application refers to an RU composed of a plurality of contiguous subcarriers, or a contiguous RU composed of two groups of contiguous subcarrier groups, each group of contiguous subcarrier groups including a plurality of contiguous subcarriers, and the two groups of contiguous subcarrier groups are only separated by guard subcarriers, null subcarriers, or direct current subcarriers. The terms "contiguous RU" and "regular RU" can be used interchangeably, and the present application does not limit the name of the contiguous RU. The plurality of contiguous subcarriers refers to a plurality of subcarriers with consecutive indices. Alternatively, the indices of the plurality of contiguous subcarriers are sorted in ascending order as [a:b], where a represents the smallest index in the indices of the plurality of subcarriers, and b represents the largest index. For example, the indices of the plurality of contiguous subcarriers included in the 26-tone RU1 are [-499:-474], or in other words, the subcarrier range of the 26-tone RU1 is [-499:-474], and the 26-tone RU1 is a contiguous RU. The contiguous RU has a smaller bandwidth and lower transmission power than the DRU. Here, "lower" is relative to the DRU, and the transmission power of the DRU can be further increased relative to the regular RU. In the present application, unless otherwise specified, RU refers to a regular RU.

[0193] The following describes the numbering of each contiguous RU and the subcarriers included in each contiguous RU, i.e., the subcarrier range of each contiguous RU, under different bandwidths. As an example, under an 80 MHz bandwidth, a total of 1024 subcarriers are included, with index values of -512,..., 0,..., 511 or indices of [-512:511]. The index values and subcarrier ranges of each contiguous RU under the 80 MHz bandwidth are shown in Table 1 below, where RU# represents the number of the RU, for example, RU1 represents the RU numbered 1.

[0194] Table 1

[0195] Referring to Table 1, each consecutive RU contains one or two groups of consecutive subcarriers. For example, each 26-tone-RU contains 26 consecutive subcarriers, each 52-tone-RU contains 52 consecutive subcarriers, each 106-tone-RU contains 106 consecutive subcarriers, each 242-tone-RU contains 242 consecutive subcarriers, each 484-tone-RU contains two groups of consecutive subcarriers, and a 996-tone-RU contains two groups of consecutive subcarriers. Each RU in Table 1 contains pilot subcarriers and data subcarriers.

[0196] At a 160 MHz bandwidth, a total of 2048 subcarriers are contained, with index values of -1024,..., 0,..., 1023. The index values and subcarrier ranges of the various RUs within the 160 MHz bandwidth can be derived by shifting and copying the index values and subcarrier ranges of the various RUs within the 80 MHz bandwidth, which will not be described again here.

[0197] 2. Distributed resource unit (DRU)

[0198] To improve the maximum transmission power of each resource block sent by the station and the access point, the concept of DRU is proposed, which improves the maximum transmission power allowed in the LPI mode by discretely distributing the subcarriers contained in each resource block within the entire or larger bandwidth. In other words, due to the limitation of power spectral density, the limited number of subcarriers (such as 26-tone RU) is discretely distributed in a wider bandwidth, which can improve the transmission power. For example, in uplink multi-user transmission, by interleaving the transmission of DRU by multiple users, the transmission power of each user can be improved under the condition of a certain bandwidth. It should be noted that the maximum power spectral density is limited in the form that the transmission power of 1 MHz does not exceed x mw, and considering the carrier spacing of 78.125 kHz, 1 MHz contains 12.8 (about 13) subcarriers. Since the average power of each subcarrier is the same during transmission, observing any 13 consecutive subcarriers, the maximum number of subcarriers carrying signals will determine the average power of each subcarrier, and in turn determine the transmission power of the signal. For example, under a 20M bandwidth (a total of 242 subcarriers), among all the 13 consecutive subcarriers, the maximum number of subcarriers carrying signals is 5, so the average power of each subcarrier will be x (mw) / 5. Considering that the subcarriers carrying signals have a total of 26, the total transmission power will be x (mw) / 5*26.

[0199] The DRU in the present application includes a plurality of subcarriers which are discrete in the frequency domain, or in other words, a plurality of subcarriers which are discrete in index (or index value), or in other words, a plurality of subcarriers which are discrete in index. The plurality of subcarriers can be partially discrete or completely discrete. For example, the plurality of subcarriers can include a portion of subcarriers which are continuous in frequency and a portion of subcarriers which are not continuous in frequency. For another example, the plurality of subcarriers can be completely not continuous in frequency. The "continuous in frequency" as mentioned above can also be referred to as continuous in index between the subcarriers, and the "not continuous in frequency" can also be referred to as not continuous in index between the subcarriers. The "distributed RU" and "DRU" or "discrete RU" can be used interchangeably in the present application. It should also be understood that the DRU mentioned in the present application refers to a RU in which the subcarriers are discrete in the frequency domain, that is, a RU having this characteristic, which is referred to as a distributed RU or a discrete RU in the present application, but the RU having this characteristic can also have other names in practice, which is not limited in the present application. The DRU in the present application includes pilot subcarriers and data subcarriers.

[0200] The current standard proposal provides DRU subcarrier plans of 20M, 40M and 80M. An existing DRU subcarrier plan of 80M bandwidth is shown in Table 2.

[0201] Table 2

[0202] In the present application, [a:b:c] represents a data set, starting from a to c, with a step of b, that is, the set [a, a+b, a+2b, a+3b,..., c], whether the last value c can be taken depends on whether (c-a) is an integer multiple of b, if not, then the element c is not included, if yes, then the element c is included. When b is equal to 1, [a:c] can be used to represent [a:1:c] in general. Referring to Table 2, the subcarrier range included in the DRU of different sizes covers the entire bandwidth, and the bandwidth occupied is larger than that of the original continuous RU of the same size, so the transmission power on the DRU can be larger in uplink transmission. Each DRU in Table 3 includes pilot subcarriers and data subcarriers.

[0203] Referring to Table 2, the indices of the subcarriers in each DRU are not consecutive, i.e., each DRU includes a plurality of subcarriers with discrete indices. One manifestation that the indices of the subcarriers in a DRU are not consecutive is that, in the sequence of the indices of the subcarriers in any DRU sorted in ascending order, the difference between at least two adjacent indices is not 1, e.g., the difference between all adjacent indices is not 1. In this application, adjacent subcarriers in a DRU can be subcarriers that are adjacent in frequency when the subcarriers included in the DRU are sorted in ascending (or descending) order of frequency. Alternatively, adjacent subcarriers in a DRU can be two subcarriers whose indices are adjacent when the indices of the subcarriers included in the DRU are sorted in ascending (or descending) order. Note that the absolute value of the difference between any two adjacent indices when the indices of the subcarriers included in any DRU are sorted in ascending (or descending) order is not 1.

[0204] Assuming that indexes of subcarriers contained in any one DRU are sequentially m#1, m#2, m#3, m#4, … m#h in ascending (or descending) order, the subcarrier with index m#1 and the subcarrier with index m#2 are adjacent subcarriers, the subcarrier with index m#2 and the subcarrier with index m#3 are adjacent subcarriers, the subcarrier with index m#3 and the subcarrier with index m#4 are adjacent subcarriers, and so on, the subcarrier with index m#(h-1) and the subcarrier with index m#h are adjacent subcarriers, where h is an integer greater than 2. In this application, adjacent subcarriers refer to subcarriers adjacent to a certain subcarrier, rather than a certain subcarrier being called an adjacent subcarrier. As an example, the 26-tone DRU1 in Table 2 contains 26 subcarriers with indexes sequentially -483, -447, -411, -375, -339, -303, -267, -231, -195, -159, -123, -87, -51, 17, 53, 89, 125, 161, 197, 233, 269, 305, 341, 377, 413, 449, -467, -431, -395, -359, -323, -287, -251, -215, -179, -143, -107, -71, -35, 33, 69, 105, 141, 177, 213, 249, 285, 321, 357, 393, 429, 465 in ascending order; where the subcarrier with index -483 and the subcarrier with index -447 are adjacent subcarriers, the subcarrier with index -447 and the subcarrier with index -411 are adjacent subcarriers, the subcarrier with index -411 and the subcarrier with index -375 are adjacent subcarriers, and so on, the subcarrier with index 429 and the subcarrier with index 465 are adjacent subcarriers.Or, the adjacent subcarrier of the subcarrier with index -483 is the subcarrier with index -447, the adjacent subcarriers of the subcarrier with index -447 include the subcarrier with index -483 and the subcarrier with index -411, the adjacent subcarriers of the subcarrier with index -411 include the subcarrier with index -447 and the subcarrier with index -375, and so on, the adjacent subcarriers of the subcarrier with index 429 include the subcarrier with index 393 and the subcarrier with index 465, and the adjacent subcarrier of the subcarrier with index 465 is the subcarrier with index 429.

[0205] 3. peak to average power ratio (PAPR)

[0206] The peak to average power ratio can be referred to as peak to average ratio. The wireless signal is observed from the time domain to be constantly changing in amplitude, so the transmission power of the wireless signal is not constant. The PAPR refers to the ratio of the peak power of the signal in a period of time to the average power of the signal. Since the OFDM symbol is superimposed by a plurality of independently modulated subcarriers, when the phases of the subcarriers are the same or similar, the signal superimposed by the plurality of subcarriers will be modulated by the same initial phase signal, thereby generating a larger instantaneous power peak, which further brings a higher PAPR. Since the dynamic range of a general power amplifier is limited, a signal with a relatively large PAPR is easy to enter the nonlinear region of the power amplifier, resulting in nonlinear distortion of the signal, causing obvious spectrum spreading interference and in-band signal distortion, and causing a serious decline in the performance of the entire system. High PAPR has become a major technical obstacle for OFDM.

[0207] For an OFDM system, for random data, the average value of the PAPR of the signal increases with the number of subcarriers, and the modulation method also affects the PAPR of the signal. The greater the modulation order, the greater the average value of the PAPR. Let X(k) be the frequency domain data to be transmitted, i.e., the frequency domain sequence, k∈[-L, L], L is an integer greater than 1. The time domain signal corresponding to X(k) satisfies the following formula:

[0208] Where x(n) represents the time domain signal corresponding to X(k).

[0209] The PAPR of x(n) can be calculated by the following formula:

[0210] If the sequence X(k) only has a non-zero value at k=m*G, and the values on other subcarriers are all 0, then let the sequence Y(m)=X(m*G), then the time domain signal of the sequence Y(m) satisfies the following formula:

[0211] wherein m is an integer greater than 0, and G is an integer greater than 1. According to formula (3), the sequence X(k) has non-zero values only at k = m*G, and has values of 0 at other subcarriers. X(k) has the same PAPR as a sequence Y(m) whose length is only 1 / G of X(k). When the number of non-zero elements of the sequence X(k) is fixed, the greater the value of G, the smaller the average PAPR of the sequence X(k).

[0212] According to the above reasoning, when a frequency domain sequence (for example, X(k)) has non-zero values only at some subcarriers, the greater the greatest common divisor of the distances between adjacent non-zero subcarriers (i.e., the greater the value of G in formula (3) above), the smaller the average PAPR of the frequency domain sequence.

[0213] 4. Physical protocol data unit (PPDU) detection

[0214] Some existing PPDU frame structures usually start with a legacy short training field (L-STF) field, which contains a 0.8us signal repeated 10 times. Some reception opportunities use the periodicity of the L-STF field to perform PPDU detection using a delay correlation method. An example of using a delay correlation method to perform PPDU detection is as follows: let r k be the received signal, then the receiver performs PPDU detection according to the ratio of the amplitudes of c n and p n in formula (3) above and formula (5) below, i.e., when is greater than a certain threshold, it is considered that a PPDU has been detected.

[0215] c n satisfies formula (4) below:

[0216] p n satisfies formula (5) below:

[0217] wherein L is the length of the correlation window, and D is the number of sampling points in a period of the STF signal (i.e., the signal carrying the L-STF field), which is 16 under a 20M bandwidth.

[0218] 5. Uplink multi-user transmission

[0219] Upstream multi-user transmission is an important technology. Referring to FIG. 3a, FIG. 3a is a flowchart of upstream multi-user transmission provided by an embodiment of the present application. As shown in FIG. 3a, the flow of upstream multi-user transmission can include: an AP sends a trigger frame for triggering upstream multi-user transmission, the trigger frame carrying identifier information of one or more stations and resource allocation information; each station, after receiving the trigger frame, sends an upstream frame (such as an upstream data frame or a control frame) on the allocated resource unit (RU) using a trigger-based physical layer protocol data unit (TB PPDU), and receives a block acknowledge (BA) frame sent by the AP after a short inter-frame space (SIFS). Each station can determine the resource unit allocated to itself based on the resource allocation information, such as a continuous RU or a DRU or an MRU.

[0220] In a possible implementation, the trigger frame can include but is not limited to a common information field and a user info list field. The common information field can contain common information that all STAs scheduled by the trigger frame need to read. In the 802.11be protocol, the user info list field of the trigger frame can include but is not limited to one or more EHT variant User Info fields. One EHT variant User Info field can contain information that an EHT STA needs to read. Referring to FIG. 3b, FIG. 3b is a frame format diagram of an EHT variant User Info field provided by an embodiment of the present application. As shown in FIG. 3b, the EHT variant User Info field includes but is not limited to a resource unit allocation subfield (RU Allocation subfield) and a primary-secondary 160 subfield (PS160 subfield).

[0221] Generally, the RU or MRU allocated to a STA can be indicated by the following subfields: the resource unit allocation subfield (RU Allocation subfield), the primary-secondary 160 subfield (PS160 subfield), the upstream bandwidth subfield (UL BW subfield) in the common information field, and the upstream bandwidth extension subfield (UL BW extension subfield) in the special user info field. In the common information field, B55 indicates whether there is a special user info field in the user info field. For an EHT TB PPDU, the bandwidth is jointly determined by the UL BW subfield and the UL BW extension subfield in the special user info field.

[0222] The B0 bit in the RU allocation subfield, the B7 to B1 bits in the RU allocation subfield, the PS160 subfield, and the mapping between the RU and the MRU are shown in Table 3 as follows. The bandwidth is determined by the UL BW subfield and the UL BW extension subfield. Table 3 shows the interpretation of the RU allocation subfield and the PS160 subfield in the trigger frame of 802.11be.

[0223] Table 3

[0224] In a possible implementation, N in Table 3 above can be obtained by the formula N = 2 * X1 + X0. The values of X1 and X0 can be seen from Table 4 below, which shows the lookup table for X1 and N.

[0225] Table 4

[0226] P80 in Table 4 above represents the primary 80 MHz channel, S80 represents the secondary 80 MHz channel, and S160 represents the secondary 160 MHz channel.

[0227] In Table 4 above, the configuration refers to the order of P80, S80, and S160 in the absolute frequency, from left to right, representing from low frequency to high frequency. For example, [P80 S80] means that the primary 80 MHz channel is the first 80 MHz channel from low to high frequency, and the secondary 80 MHz channel is the second 80 MHz channel from low to high frequency; or in other words, [P80 S80] means that the primary 80 MHz channel is the low 80 MHz channel, and the secondary 80 MHz channel is the high 80 MHz channel. For another example, [S80 P80 S160] means that the secondary 80 MHz channel is the low 80 MHz channel in the low 160 MHz channel, the primary 80 MHz channel is the high 80 MHz channel in the low 160 MHz channel, and the secondary 160 MHz channel is the high 160 MHz channel.

[0228] In the above description of the PAPR, it has been described that when there are non-zero values in only part of the subcarriers of the frequency domain sequence, the greater the greatest common divisor of the distances (or intervals) between adjacent non-zero subcarriers, i.e. the greater the G in the above formula (3), the smaller the average PAPR of the frequency domain sequence. The non-zero subcarriers include pilot subcarriers and data subcarriers. The subcarriers in the DRU can all be non-zero subcarriers. It should be understood that when the communication device transmits data through the DRU, the greater the greatest common divisor of the distances between adjacent subcarriers in the DRU, the smaller the average PAPR of the transmitted signal. The distance between adjacent subcarriers refers to the distance between adjacent subcarriers, i.e. the absolute value of the difference between the indices of two adjacent subcarriers. Alternatively, when data is transmitted through the DRU, the greater the greatest common divisor of the difference between the indices of adjacent subcarriers in the DRU, the smaller the average PAPR of the transmitted signal. In this application, the difference between the indices of adjacent subcarriers in the DRU includes the difference between the indices of all adjacent subcarriers in the DRU. For example, the indices of the subcarriers included in the DRU are sequentially sorted in ascending (or descending) order as m#1, m#2, m#3, m#4, … m#h, the difference between the indices of adjacent subcarriers in the DRU includes (m#2-m#1), (m#3-m#2), (m#4-m#3), …, (m#h-m#(h-1)), m#1, m#2, m#3, m#4, … m#h are all integers, and h is an integer greater than 1; the greatest common divisor of the difference between the indices of adjacent subcarriers in the DRU refers to the greatest common divisor of (m#2-m#1), (m#3-m#2), (m#4-m#3), …, (m#h-m#(h-1)).

[0229] The table 2 shows a DRU subcarrier planning under 80M bandwidth. Referring to the table 2, the distance between adjacent subcarriers in the 106-tone DRU is 8 or 12, the distance between adjacent subcarriers in the 52-tone DRU is 16 or 20, the greatest common divisor of the distance between adjacent subcarriers in the 106-tone DRU is only 4, and the greatest common divisor of the distance between adjacent subcarriers in the 52-tone DRU is also only 4. Therefore, when data transmission is performed by using the DRU in the table 2, the average of the PAPR of the transmission signal is large, and nonlinear distortion is easily caused and the efficiency of the power amplifier is reduced. In view of the defects of the existing DRU subcarrier planning under 80M bandwidth (for example, the DRU subcarrier planning shown in the table 2), the present application designs a DRU subcarrier planning under 80M bandwidth. Compared with the data transmission performed by using the 106-tone DRU in the DRU subcarrier planning shown in the table 2, the data transmission performed by using the 106-tone DRU in the DRU subcarrier planning of the present application can reduce the PAPR of the transmission signal, and / or, compared with the data transmission performed by using the 52-tone DRU in the DRU subcarrier planning shown in the table 2, the data transmission performed by using the 52-tone DRU in the DRU subcarrier planning of the present application can reduce the PAPR of the transmission signal. Further, in each 106-tone DRU in the DRU subcarrier planning under 80M bandwidth designed by the present application, only the pilot subcarrier exists in the 1MHz range adjacent to each pilot subcarrier, that is, for a 106-tone DRU, in the 106-tone DRU, there is no other subcarrier belonging to the 106-tone DRU in the 1MHz range adjacent to the pilot subcarrier. Therefore, the pilot subcarrier can have a larger transmission power than the data subcarrier.

[0230] The method provided by the embodiment of the present application is described below.

[0231] FIG. 4 is a flow diagram of a communication method provided by the embodiment of the present application. The description of the first communication device and the second communication device involved in FIG. 4 can refer to the above, and will not be described in detail here. As shown in FIG. 4, the method comprises:

[0232] 401. The first communication device generates an OFDM symbol according to a subcarrier planning corresponding to the first bandwidth.

[0233] The first bandwidth is 80MHz, and can also be 40+40MHz, the former is a continuous frequency band, and the two 40MHz of the latter can be separated. The first bandwidth can also be 40, 160MHz, or other bandwidths. In this paper, the first bandwidth is taken as an example for description. The subcarrier planning corresponding to the first bandwidth can be the subcarrier planning under 80M bandwidth designed by the present application.

[0234] The subcarrier planning corresponding to the first bandwidth includes a plurality of 106-tone DRUs; in each of the plurality of 106-tone DRUs, each pilot subcarrier is more than 13 away from the index of the adjacent subcarrier, or in each of the plurality of 106-tone DRUs, each pilot subcarrier is the only subcarrier in the 1MHz range adjacent to the pilot subcarrier, i.e. each pilot subcarrier in each 106-tone DRU is the only non-empty subcarrier (or non-zero subcarrier) in the 1MHz range adjacent to the pilot subcarrier; thus the pilot subcarrier can have greater transmission power than the data subcarrier, thereby improving system performance. Each 106-tone DRU includes 102 data subcarriers and 4 pilot subcarriers, and the 106-tone DRU occupies a bandwidth of 80M, which cannot make each subcarrier the only subcarrier in the 1MHz range adjacent to the subcarrier. Referring to Table 2, taking the 106-tone DRU as an example, there are two subcarriers in each MHz bandwidth, and let P be the maximum power spectral density per MHz under regulatory restrictions, then the maximum transmission power of the 106-tone DRU is 53P, and since the DRU occupies a bandwidth of 80M, the theoretical maximum transmission power can be 80P, and part of the power gain is not fully utilized. In the subcarrier planning of the 80MHz bandwidth designed by the present application, each pilot subcarrier in each 106-tone DRU is the only subcarrier in the 1MHz range adjacent to the pilot subcarrier, so that the pilot subcarrier can have greater transmission power than the data subcarrier, for example, the transmission power of the pilot subcarrier is twice the transmission power of the data subcarrier. The 106-tone DRU in the subcarrier planning of the 80MHz bandwidth designed by the present application can more fully utilize the power gain compared to the 106-tone DRU shown in Table 2.

[0235] The subcarrier spacing in the current WLAN system is 78.125 KHz. 13 subcarrier spacings is 13*78.125 KHz = 1015.625 KHz ~ 1 MHz. In each 106-tone DRU, the difference between the index of each pilot subcarrier and the index of the adjacent subcarrier is greater than 13, and in each 106-tone DRU, only the pilot subcarrier within the 1 MHz range adjacent to each pilot subcarrier can be considered as two equivalent descriptions. Or, in each 106-tone DRU, the difference between the index of each pilot subcarrier and the index of the adjacent subcarrier is greater than 13 is a specific manifestation of only the pilot subcarrier within the 1 MHz range adjacent to each pilot subcarrier in each 106-tone DRU. It should be understood that when the subcarrier spacing in the WLAN system changes, the threshold of the difference between the index of each pilot subcarrier and the index of the adjacent subcarrier in the 106-tone DRU also changes accordingly, and the difference between the index of each pilot subcarrier and the index of the adjacent subcarrier in the 106-tone DRU greater than the threshold is equivalent to only the pilot subcarrier within the 1 MHz range adjacent to each pilot subcarrier in each 106-tone DRU. Only the pilot subcarrier within the 1 MHz range adjacent to each pilot subcarrier in each 106-tone DRU can be: the frequency offset between each pilot subcarrier and the adjacent subcarrier in each 106-tone DRU is greater than or equal to 1 MHz. Or, only the pilot subcarrier within the 1 MHz range adjacent to each pilot subcarrier in each 106-tone DRU can be: the frequency offset between each pilot subcarrier and the adjacent subcarrier in each 106-tone DRU is at least 1 MHz. FIG. 5 is a schematic diagram of the 1 MHz range adjacent to the pilot subcarrier in the 106-tone DRU provided by the embodiment of the present application. As shown in FIG. 5, the bandwidth occupied by the pilot subcarrier is [f1, f2], f1 is the starting frequency, and f2 is the ending frequency. The 1 MHz range adjacent to the pilot subcarrier includes [f1-1MHz, f2+1MHz], f2 is greater than f1, and f2 and f2 are real numbers.

[0236] Optionally, in the plurality of 106-tone DRUs, the difference between the indices of any two adjacent subcarriers in each 106-tone DRU is n times of m. Alternatively, the difference between the indices of adjacent subcarriers in each 106-tone DRU is n times of m. Alternatively, the greatest common divisor of the difference between the indices of adjacent subcarriers in each 106-tone DRU is m. When the first communication device transmits data by using the 106-tone DRUs contained in the subcarrier plan corresponding to the first bandwidth, the average of the PAPR of the data part of the transmitted signal can be reduced. m is an integer greater than 4, and n is an integer greater than or equal to 1. For example, m is 6 or 8. As an example, the difference between the indices of any two adjacent subcarriers in each 106-tone DRU is an integer multiple of 8, or the greatest common divisor of the difference between the indices of adjacent subcarriers in each 106-tone DRU is 8.

[0237] The present application provides a condition that the plurality of 106-tone DRUs contained in the subcarrier plan corresponding to the first bandwidth should satisfy, i.e., in each 106-tone DRU, each pilot subcarrier is the only subcarrier in the 1 MHz range adjacent to the pilot subcarrier, and the difference between the indices of any two adjacent subcarriers in each 106-tone DRU is n times of m. One or more subcarrier plans satisfying the condition can be designed by those skilled in the art. An example of the plurality of 106-tone DRUs contained in the subcarrier plan corresponding to the first bandwidth is as follows: the plurality of 106-tone DRUs includes 106-tone DRU1 to 106-tone DRU8, and the 106-tone DRU1 to 106-tone DRU8 satisfy one or more of the following conditions:

[0238] The 106-tone DRU1 contains 106 subcarriers with indices [-493:8:-421, -405, -389:8:-197, -181, -165:8:-45, 11:8:131, 147, 163:8:355, 371, 387:8:459], and the 106-tone DRU1 contains 4 pilot subcarriers with indices -405, -181, 147, and 371; or,

[0239] The 106-tone DRU2 contains 106 subcarriers with indices [-481:8:-297, -281, -265:8:-73, -57, -41:8:-33, 23:8:31, 47, 63:8:255, 271, 287:8:471], and the 106-tone DRU2 contains 4 pilot subcarriers with indices -281, -57, 47, and 271; or,

[0240] The 106-tone DRU3 includes 106 subcarriers with indices [-467:8:-395, -379, -363:8:-171, -155, -139:8:-19, 37:8:157, 173, 189:8:381, 397, 413:8:485], and the 106-tone DRU3 includes 4 pilot subcarriers with indices -379, -155, 173, and 397; or,

[0241] The 106-tone DRU4 includes 106 subcarriers with indices [-455:8:-271, -255, -239:8:-47, -31, -15:8:-7, 49:8:57, 73, 89:8:281, 297, 313:8:497], and the 106-tone DRU4 includes 4 pilot subcarriers with indices -255, -31, 73, and 297; or,

[0242] The 106-tone DRU5 includes 106 subcarriers with indices [-494:8:-470, -454, -438:8:-262, -246, -230:8:-46, 10:8:194, 210, 226:8:402, 418, 434:8:458], and the 106-tone DRU5 includes 4 pilot subcarriers with indices -454, -246, 210, and 418; or,

[0243] The 106-tone DRU6 includes 106 subcarriers with indices [-482:8:-346, -330, -314:8:-138, -122, -106, -98:8:-3422:8:94, 110, 126, 134:8:302, 318, 334:8:470], and the 106-tone DRU6 includes 4 pilot subcarriers with indices -330, -122, 110, and 318; or,

[0244] The 106-tone DRU7 includes 106 subcarriers with indices [-468:8:-444, -428, -412:8:-236, -220, -204:8:-20, 36:8:220, 236, 252:8:428, 444, 460:8:484], and the 106-tone DRU7 includes 4 pilot subcarriers with indices -428, -220, 236, and 444; or,

[0245] The indexes of the 106 subcarriers included in the 106-tone DRU8 are [-456:8:-320, -304, -288:8:-112, -96, -80, -72:8:-848:8:120, 136, 152, 160:8:328, 344, 360:8:496], and the indexes of the 4 pilot subcarriers included in the 106-tone DRU8 are -304, -96, 136, and 344.

[0246] In a possible implementation, the subcarrier arrangement corresponding to the first bandwidth further includes a plurality of 52-tone DRUs, and in each 52-tone DRU, the difference between the indexes of any two adjacent subcarriers is an n multiple of m, and the difference between the indexes of at least part of the adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16.

[0247] In this implementation, the difference between the indexes of any two adjacent subcarriers in each 52-tone DRU is an n multiple of m, so that when data transmission is performed on the 52-tone DRUs included in the subcarrier arrangement corresponding to the first bandwidth, the average of the PAPR of the data part of the transmission signal can be reduced. The difference between the indexes of at least part of the adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16, so that when a delay correlation method is used for PPDU detection, PPDU false detection can be avoided.

[0248] The present application provides a condition that the plurality of 52-tone DRUs included in the subcarrier arrangement corresponding to the first bandwidth should satisfy, i.e., the difference between the indexes of any two adjacent subcarriers in each 52-tone DRU is an n multiple of m, and the difference between the indexes of at least part of the adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16. One skilled in the art can design one or more subcarrier arrangements that satisfy this condition. An example of the plurality of 52-tone DRUs included in the subcarrier arrangement corresponding to the first bandwidth is as follows: the plurality of 52-tone DRUs include 52-tone DRU1 to 52-tone DRU16, and 52-tone DRU1 to 52-tone DRU16 satisfy one or more of the following conditions:

[0249] The indexes of the 52 subcarriers included in the 52-tone DRU1 are [-477:16:-429, -405:16:-197, -157:16:-45, 11:16:123, 163:16:371, 395:16:443]; or,

[0250] 52-tone DRU2 contains 52 subcarriers with indices [-485:16:-421,-381:16:-205,-181:16:-53,19:16:147,171:16:347,387:16:451]; or,

[0251] 52-tone DRU3 contains 52 subcarriers with indices [-465:16:-305,-281:16:-73,-33,23,63:16:271,295:16:455]; or,

[0252] 52-tone DRU4 contains 52 subcarriers with indices [-473:16:-297,-257:16:-81,-57,-41,31,47,71:16:247,287:16:463]; or,

[0253] 52-tone DRU5 contains 52 subcarriers with indices [-451:16:-403,-379:16:-171,-131:16:-19,37:16:149,189:16:397,421:16:469]; or,

[0254] 52-tone DRU6 contains 52 subcarriers with indices [-459:16:-395,-355:16:-179,-155:16:-27,45:16:173,197:16:373,413:16:477]; or,

[0255] 52-tone DRU7 contains 52 subcarriers with indices [-439:16:-279,-255:16:-47,-7,49,89:16:297,321:16:481]; or,

[0256] 52-tone DRU8 contains 52 subcarriers with indices [-447:16:-271,-231:16:-55,-31,-15,57,73,97:16:273,313:16:489]; or,

[0257] 52-tone DRU9 contains 52 subcarriers with indices [-478,-454:16:-262,-222:16:-46,10:16:186,226:16:418,442]; or,

[0258] 52-tone DRU10 includes 52 subcarriers with indices [-486,-470,-430:16:-270,-246:16:-54,18:16:210,234:16:402,434,450] or,

[0259] 52-tone DRU11 includes 52 subcarriers with indices [-466:16:-354,-330:16:-138,-98:16:-34,22:16:86,126:16:318,342:16:454] or,

[0260] 52-tone DRU12 includes 52 subcarriers with indices [-474:16:-346,-306:16:-146,-122:16:-42,30:16:110,134:16:294,334:16:462] or,

[0261] 52-tone DRU13 includes 52 subcarriers with indices [-452,-428:16:-236,-196:16:-20,36:16:212,252:16:444,468] or,

[0262] 52-tone DRU14 includes 52 subcarriers with indices [-460,-444,-404:16:-244,-220:16:-28,44:16:236,260:16:420,460,476] or,

[0263] 52-tone DRU15 includes 52 subcarriers with indices [-440:16:-328,-304:16:-112,-72:16:-8,48:16:112,152:16:344,368:16:480] or,

[0264] 52-tone DRU16 includes 52 subcarriers with indices [-448:16:-320,-280:16:-120,-96:16:-16,56:16:136,160:16:320,360:16:488].

[0265] In a possible implementation, the plurality of 52-tone DRUs includes 52-tone DRU1 to 52-tone DRU16, and the 52-tone DRU1 to 52-tone DRU16 satisfy one or more of the following:

[0266] The 52-tone DRU1 includes four pilot subcarriers with indices -405, -293, 259, and 371; or

[0267] The 52-tone DRU2 includes four pilot subcarriers with indices -181, -69, 35, and 147; or

[0268] The 52-tone DRU3 includes four pilot subcarriers with indices -281, -169, 159, and 271; or

[0269] The 52-tone DRU4 includes four pilot subcarriers with indices -393, -57, 47, and 383; or

[0270] The 52-tone DRU5 includes four pilot subcarriers with indices -379, -267, 285, and 397; or

[0271] The 52-tone DRU6 includes four pilot subcarriers with indices -155, -43, 61, and 173; or

[0272] The 52-tone DRU7 includes four pilot subcarriers with indices -255, -143, 185, and 297; or

[0273] The 52-tone DRU8 includes four pilot subcarriers with indices -367, -31, 73, and 409; or

[0274] The 52-tone DRU9 includes four pilot subcarriers with indices -454, -342, 306, and 418; or

[0275] The 52-tone DRU10 includes four pilot subcarriers with indices -246, -134, 98, and 210; or

[0276] The 52-tone DRU11 includes four pilot subcarriers with indices -330, -234, 222, and 318; or

[0277] The 52-tone DRU12 includes four pilot subcarriers with indices -442, -122, 110, and 430; or

[0278] The 52-tone DRU13 includes four pilot subcarriers with indices -428, -316, 332, and 444; or

[0279] The 52-tone DRU 14 includes four pilot subcarriers with indices -220, -108, 124, and 236; or

[0280] The 52-tone DRU 15 includes four pilot subcarriers with indices -304, -208, 248, and 344; or

[0281] The 52-tone DRU 16 includes four pilot subcarriers with indices -416, -96, 136, and 456.

[0282] Each 52-tone DRU includes four pilot subcarriers. Each 106-tone DRU includes two 52-tone DRUs, and the pilot subcarriers in each 106-tone DRU can be selected from the eight pilot subcarriers in the two 52-tone DRUs included in the 106-tone DRU. The pilot subcarriers in the 106-tone DRU can be selected from the eight pilot subcarriers such that the distance between adjacent subcarriers is greater than 13, so that the pilot subcarriers in the 106-tone DRU can have greater power gain.

[0283] In a possible implementation, the subcarrier plan corresponding to the first bandwidth includes a 242-tone DRU 1 and / or a 242-tone DRU 2. The 242-tone DRU 1 includes 242 subcarriers with indices [-497:4:-17, 7:4:487]. The 242-tone DRU 2 includes 242 subcarriers with indices [-487:4:-7, 17:4:497].

[0284] 402. The first communication device sends an OFDM symbol.

[0285] Correspondingly, the second communication device receives the OFDM symbol according to the subcarrier plan corresponding to the first discrete bandwidth. As an example, the first communication device is a station and the second communication device is an access point. As another example, the first communication device is an access point and the second communication device is a station.

[0286] 403. The second communication device parses the OFDM symbol.

[0287] In the embodiments of the present application, the difference between the index of each pilot subcarrier and the index of the adjacent subcarrier in each 106-tone DRU contained in the subcarrier planning corresponding to the first bandwidth is greater than 13, or in each 106-tone DRU contained in the subcarrier planning corresponding to the first bandwidth, there is only the pilot subcarrier within the 1MHz range adjacent (or peripheral) to each pilot subcarrier; thus the pilot subcarrier can have greater transmission power than the data subcarrier, thereby improving the system performance. In addition, the difference between the index of any two adjacent subcarriers in each 106-tone DRU is n times of m, thus when the 106-tone DRU contained in the subcarrier planning corresponding to the first bandwidth is used for data transmission, the average value of the PAPR of the data part of the transmission signal can be reduced.

[0288] The foregoing introduces the conditions that the DRUs of different sizes in the subcarrier planning corresponding to the first bandwidth should satisfy, or the features possessed by the DRUs of different sizes in the subcarrier planning corresponding to the first bandwidth. The following introduces the specific process of designing the DRU subcarrier planning under the 80MHz bandwidth.

[0289] The specific process of designing the DRU subcarrier planning under the 80MHz bandwidth by the present application is as follows: under the 80MHz bandwidth, since the subcarrier spacing in the current WLAN system is 78.125kHz, there are 1024 subcarriers in total, and the subcarrier indexes are -512,..., 0,..., 511. Among them, the left 12 [-512:-501] and the right 11 [501:511] are in the guard interval and cannot be used, and at least 5 [-2:2] are near the direct current subcarrier and also cannot be used. Under the 80MHz bandwidth, the index range of the subcarriers that can be used by the station or access point is [-500:-500]. Assuming that the distance between the two adjacent subcarriers with continuous indexes is 1, the distance corresponding to each subcarrier that can be used by the station or access point is 1000, and reference is made to FIG. 6. FIG. 6 shows a schematic diagram of the distance corresponding to each subcarrier that can be used by the station or access point under the 80MHz bandwidth.

[0290] In order to have a lower PAPR of the data part of the transmission signal when data is transmitted through the DRU, it is necessary to increase the greatest common divisor of the difference between the indexes of the adjacent subcarriers in the DRU as much as possible. Therefore, for the 484-tone DRU, the greatest common divisor of the difference between the indexes of the adjacent subcarriers is less than or equal to which represents the floor function. For the 242-tone DRU, the greatest common divisor of the difference between the indexes of the adjacent subcarriers is less than or equal to Therefore, in designing the 484-tone DRU, the difference between the indexes of the adjacent subcarriers is an integer multiple of 2, i.e., the greatest common divisor of the difference between the indexes of the adjacent subcarriers is 2, so that the designed 484-tone DRU has a lower PAPR. In designing the 242-tone DRU, the difference between the indexes of the adjacent subcarriers is an integer multiple of 4, i.e., the greatest common divisor of the difference between the indexes of the adjacent subcarriers is 4, so that the 242-tone DRU has a lower PAPR. Since each 242-tone DRU contains not only the subcarriers in the two 106-tone DRUs but also a plurality of additional subcarriers, in designing the DRU subcarrier plan under the 80MHz bandwidth, the present application takes advantage of this feature to make the pilot subcarrier adjacent to only one non-empty subcarrier per MHz range in the 106-tone DRU, so that the pilot subcarrier in the 106-tone DRU has a greater power gain than the data subcarrier, i.e., the transmission power of the pilot subcarrier can be higher than that of the data subcarrier.

[0291] In a possible design, the DRU in the DRU subcarrier plan should satisfy the inheritance structure, i.e., each 484-tone DRU contains two 242-tone DRUs, each 242-tone DRU contains two 106-tone DRUs, and each 106-tone DRU contains two 52-tone DRUs, so as to simplify the indication signaling overhead of the DRU. Therefore, when the distance between the adjacent subcarriers in the designed 242-tone DRU is an integer multiple of 4, the greatest common divisor of the distance between the adjacent subcarriers in the 106-tone DRU can be 8. In order to avoid PPDU mis-detection, the distance between the adjacent subcarriers in the 52-tone DRU cannot be an integer multiple of 16, so in designing the 52-tone DRU, the greatest common divisor of the distance between the adjacent subcarriers is 8 to avoid PPDU mis-detection, for example, the difference between the indexes of any two adjacent subcarriers in each 52-tone DRU is an integer multiple of 8, and the difference between the indexes of at least part of the adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16. Table 5 shows an example of the DRU subcarrier plan under the 80MHz bandwidth designed by the present application.

[0292] Table 5

[0293] Table 5 shows an example of the DRU subcarrier plan under 80MHz bandwidth. It should be understood that one skilled in the art can design a DRU subcarrier plan under 80MHz bandwidth satisfying the following target conditions according to the design procedure provided in the present application, the target conditions including that the DRU subcarrier plan under 80MHz bandwidth contains a plurality of 106-tone DRUs, the difference between the indices of any two adjacent subcarriers in each 106-tone DRU is n times of m, and the difference between the indices of each pilot subcarrier and adjacent subcarrier in each 106-tone DRU is greater than 13, m is an integer greater than 4, and n is an integer greater than or equal to 1. Optionally, the target conditions can further include that the DRU subcarrier plan under 80MHz bandwidth contains a plurality of 52-tone DRUs, the difference between the indices of any two adjacent subcarriers in each 52-tone DRU is n times of m, and the difference between the indices of at least some adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16.

[0294] In the DRU subcarrier plan under 80MHz bandwidth shown in Table 5, each DRU contains pilot subcarriers and data subcarriers. In each 106-tone DRU in the DRU subcarrier plan under 80MHz bandwidth designed in the present application, the difference between the indices of each pilot subcarrier and adjacent subcarrier is greater than 13. Table 6 shows an example of the indices of the pilot subcarriers contained in 106-tone DRU1-106-tone DRU8, respectively.

[0295] Table 6

[0296] In which, the indices of the four pilot subcarriers contained in 106-tone DRU1 are -405, -181, 147 and 371, the indices of the four pilot subcarriers contained in 106-tone DRU1 are -281, -57, 47 and 271, and so on, and the indices of the four pilot subcarriers contained in 106-tone DRU8 are -304, -96, 136 and 344.

[0297] For a 242-tone DRU, its pilot subcarriers are the pilot subcarriers of the two 106-tone DRUs it contains; for a 484-tone DRU, its pilot subcarriers are the pilot subcarriers in the two 242-tone DRUs it contains.

[0298] Figure 7 is a flow chart illustrating another method of communication according to an embodiment of the present application. The first communication device and the second communication device involved in Figure 7 can be the same as those described above, and thus will not be described again. The method flow in Figure 7 is an example of the method described in Figure 4. Figure 7 describes an uplink transmission flow. In the flow of Figure 7, the second communication device (e.g. an access point) generates OFDM symbols according to the resource allocation information in the trigger frame and the subcarrier plan corresponding to the first bandwidth, so that the pilot subcarriers can have a larger transmission power than the data subcarriers. As shown in Figure 7, the method comprises the following steps:

[0299] 701. The second communication device sends a trigger frame to the first communication device.

[0300] Correspondingly, the first communication device receives the trigger frame from the second communication device. The second communication device is an access point, and the first communication device is a station. The trigger frame is used to trigger uplink multi-user transmission. The trigger frame carries the identifier information and the resource allocation information of one or more stations (including the first communication device). The first communication device can determine the DRU allocated to itself based on the resource allocation information.

[0301] 702. The first communication device determines the DRU allocated to itself according to the trigger frame.

[0302] The DRU allocated to the first communication device can be indicated by the following subfields in the trigger frame: the resource unit allocation subfield, the primary-secondary 160 subfield (PS 160 subfield), the uplink bandwidth subfield (UL BW subfield) in the common information field, and the uplink bandwidth extension subfield (UL BW extension subfield) in the special user information field. The way the first communication device determines the DRU allocated to itself based on the resource allocation information will not be described again. The DRU allocated to the first communication device determined by the first communication device includes one or more DRUs in the subcarrier plan corresponding to the first bandwidth. For example, the DRU allocated to the first communication device determined by the first communication device includes one or more 106-tone DRUs in Table 5. For another example, the DRU allocated to the first communication device determined by the first communication device includes one or more 52-tone DRUs in Table 5.

[0303] 703. The first communication device generates OFDM symbols according to the subcarrier plan corresponding to the first bandwidth and the DRU allocated to itself.

[0304] In a possible implementation, the first communication device determines data subcarriers and pilot subcarriers contained in the DRU allocated to the first communication device according to the subcarrier plan corresponding to the first bandwidth; and generates an OFDM symbol according to the data subcarriers contained in the DRU allocated to the first communication device. As an example, the first bandwidth is 80 MHz, and the DRU allocated to the first communication device includes a 52-tone DRU1; the first communication device can determine data subcarriers and pilot subcarriers in the 52-tone DRU1 according to the subcarrier plan corresponding to the first bandwidth; and then generate an OFDM symbol according to the data subcarriers in the 52-tone DRU1. As another example, the first bandwidth is 80 MHz, and the DRU allocated to the first communication device includes a 106-tone DRU1; the first communication device can determine data subcarriers and pilot subcarriers in the 106-tone DRU1 according to the subcarrier plan corresponding to the first bandwidth; and then generate an OFDM symbol according to the data subcarriers in the 106-tone DRU1.

[0305] 704. The first communication device transmits a PPDU on the DRU allocated to the first communication device.

[0306] The second communication device receives the PPDU from the first communication device. The PPDU includes one or more OFDM symbols, i.e., the OFDM symbol generated in step 703.

[0307] 705. The second communication device transmits an acknowledgement frame to the first communication device.

[0308] Correspondingly, the first communication device receives the acknowledgement frame from the second communication device. For example, the first communication device receives the acknowledgement frame transmitted by the second communication device after a SIFS after transmitting the PPDU.

[0309] In the embodiments of the present application, the first communication device generates an OFDM symbol according to the subcarrier plan corresponding to the first bandwidth and the DRU allocated to the first communication device, and the pilot subcarriers can have greater transmission power than the data subcarriers, thereby improving system performance.

[0310] FIG. 8 is a flow diagram of another communication method according to an embodiment of the present application. The first communication device and the second communication device involved in FIG. 8 are described above and will not be described here. The method flow in FIG. 8 is an example of the method described in FIG. 4. FIG. 8 describes a downlink transmission process. In the flow in FIG. 8, the UHR-SIG field in the PPDU transmitted by the first communication device indicates the DRU allocated to the second communication device. As shown in FIG. 8, the method includes:

[0311] 801. The first communication device generates an OFDM symbol according to the subcarrier plan corresponding to the first bandwidth.

[0312] Step 801 can refer to step 401 in FIG. 4.

[0313] 802. The first communication device transmits a PPDU on the first DRU.

[0314] The second communication device receives the PPDU from the first communication device. The PPDU includes one or more OFDM symbols, i.e., the OFDM symbols generated in step 801. The first communication device is an access point, and the second communication device is a station. The first DRU can include one or more DRUs in Table 5. The PPDU includes a field indicating the first DRU. For example, the UHR-SIG field in the PPDU indicates the first DRU.

[0315] 803. The second communication device parses the OFDM symbols in the PPDU.

[0316] In an embodiment of the present application, the first communication device transmits the PPDU on the first DRU, which can increase the frequency domain diversity gain of the downlink transmission, thereby improving the transmission performance.

[0317] The DRU subcarrier plan defined in the present application is introduced above. The DRU subcarrier plan defined in the present application can make the subcarriers in each resource block discrete (or discontinuous), which can be distributed on a larger bandwidth, thereby enabling the transmitting end to transmit with a larger transmitting power. In the DRU subcarrier plan defined in the present application, the greatest common divisor of the distance between the adjacent subcarriers included in the DRU is large, to ensure that the average PAPR of the data part is small.

[0318] To compare the PAPR of different DRU designs, we randomly generate random binary phase shift keying (BPSK) data and quadrature phase shift keying (QPSK) data for each DRU (Table 5) respectively, and count the distribution of PAPR, and compare the complementary cumulative distribution function (CCDF) of different schemes. The complementary cumulative distribution function F(x) is a continuous function, which represents the sum of the probabilities of all values greater than x, i.e. F(x) = P(X>x)). FIGS. 9a, 9b, 9c, and 9d are simulation comparison results provided by the present application. In FIG. 9a, the line with "o" represents the CCDF of BPSK data randomly generated by the 106-tone DRU in the DRU subcarrier plan defined by the present application, the line with "x" represents the CCDF of BPSK data randomly generated by the RRU containing 106 subcarriers, and the line with "△" represents the CCDF of BPSK data randomly generated by the 106-tone DRU in Table 2. In FIG. 9b, the line with "o" represents the CCDF of BPSK data randomly generated by the 52-tone DRU in the DRU subcarrier plan defined by the present application, the line with "x" represents the CCDF of BPSK data randomly generated by the RRU containing 52 subcarriers, and the line with "△" represents the CCDF of BPSK data randomly generated by the 52-tone DRU in Table 2. In FIG. 9c, the line with "o" represents the CCDF of QPSK data randomly generated by the 106-tone DRU in the DRU subcarrier plan defined by the present application, the line with "x" represents the CCDF of QPSK data randomly generated by the RRU containing 106 subcarriers, and the line with "△" represents the CCDF of QPSK data randomly generated by the 106-tone DRU in Table 2. In FIG. 9d, the line with "o" represents the CCDF of QPSK data randomly generated by the 52-tone DRU in the DRU subcarrier plan defined by the present application, the line with "x" represents the CCDF of QPSK data randomly generated by the RRU containing 52 subcarriers, and the line with "△" represents the CCDF of QPSK data randomly generated by the 52-tone DRU in Table 2.

[0319] Referring to FIGS. 9a-9d, from the simulation comparison results, the DRU subcarrier planning defined in the present application and the DRU subcarrier planning shown in Table 2 have smaller average PAPR in all different DRU sizes. For 106-tone DRU, the present application has almost the same PAPR distribution as RRU, which can effectively avoid the problem of PAPR becoming large after subcarriers are dispersed to a large bandwidth.

[0320] The communication apparatus provided by the embodiments of the present application will be described below.

[0321] The present application divides the functions of the communication apparatus according to the above-mentioned method embodiments, for example, each function module can be divided according to each function, or two or more functions can be integrated in one processing module. The above-mentioned integrated module can be realized in the form of hardware or in the form of a software function module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical function division. In actual implementation, there can be another division manner. The communication apparatus of the embodiments of the present application will be described in detail below with reference to FIGS. 10-12.

[0322] FIG. 10 is a structural schematic diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 10, the communication apparatus includes a processing module 1001 and a transceiver module 1002. The transceiver module 1002 can realize corresponding communication functions, and the processing module 1001 is used to realize corresponding processing functions. The transceiver module 1002 can also be referred to as an interface, a communication interface, or a communication module, etc.

[0323] In some embodiments of the present application, the communication apparatus can be used to perform the actions performed by the first communication apparatus in the above-mentioned method embodiments. At this time, the first communication apparatus can be a Wi-Fi device itself or a chip or a function module configured in the device, etc. The transceiver module 1002 is used to perform the transceiver-related operations of the first communication apparatus in the above-mentioned method embodiments, and the processing module 1001 is used to perform the processing-related operations of the first communication apparatus in the above-mentioned method embodiments.

[0324] The processing module 1001 can be used to generate an OFDM symbol, and the transceiver module 1002 can be used to transmit or output the OFDM symbol on a first bandwidth. The subcarrier planning corresponding to the first bandwidth is as described above.

[0325] For example, the processing module 1001 can include at least one of the following modules: a constellation mapping module, a stream cyclic shift module, a space and frequency mapping module, an IDFT module, an insert cyclic prefix and windowing module. For example, the transceiver module 1002 can include a radio frequency module, an antenna module, etc. For example, the transceiver module 1002 can include a pin module, etc.

[0326] In another embodiment of the present application, the communication device of FIG. 10 can be configured to perform the actions performed by the second communication device in the above method embodiments. The communication device can be a Wi-Fi device itself or a chip or functional module configured in the device, etc. The transceiver module 1002 can be configured to perform the transceiver-related operations of the second communication device in the above method embodiments, and the processing module 1001 can be configured to perform the processing-related operations of the second communication device in the above method embodiments.

[0327] The transceiver module 1002 can be configured to receive or input the OFDM symbol, and the processing module 1001 can be configured to parse the OFDM symbol.

[0328] For example, the processing module 1001 can include at least one of the following components: a cyclic prefix removal module, a DFT module, a deinterleaving module, a deconstellation module, and a descrambling module. For example, the transceiver module 1002 can include a radio frequency module, an antenna module, etc. For example, the transceiver module 1002 can include a pin module, etc.

[0329] Optionally, in the above embodiments, the communication device can further include a storage module configured to store instructions and / or data. The processing module 1001 can read the instructions and / or data in the storage module to enable the communication device to implement the above method embodiments. For example, the storage module can store the subcarrier planning shown above, etc.

[0330] In the above embodiments, the specific descriptions of the terms, names, or steps, etc. can refer to the descriptions in the above method embodiments, which will not be repeated here.

[0331] The specific descriptions of the transceiver module and the processing module in the above embodiments are only examples. For the specific functions or steps performed by the transceiver module and the processing module, etc., please refer to the above method embodiments, which will not be repeated here.

[0332] The above describes the communication device of the embodiments of the present application. The following describes possible product forms of the communication device. Any product form having the functions of the communication device of FIG. 10 falls within the protection scope of the embodiments of the present application. The following descriptions are only examples and do not limit the product forms of the communication device of the embodiments of the present application.

[0333] In a possible implementation, in the communication apparatus shown in FIG. 10, the processing module 1001 can be one or more processors, and the transceiver module 1002 can be a transceiver, or the transceiver module 1002 can also be a sending module and a receiving module, the sending module can be a transmitter, and the receiving module can be a receiver, and the sending module and the receiving module are integrated in one device, for example, a transceiver. In the embodiment of the present application, the processor and the transceiver can be coupled, and the connection manner between the processor and the transceiver is not limited in the embodiment of the present application. In the process of executing the above method, the process about sending information in the above method can be the process that the processor outputs the above information. When the above information is output, the processor outputs the above information to the transceiver, so as to be transmitted by the transceiver. After the above information is output by the processor, the above information can also need to be processed further, and then reaches the transceiver. Similarly, the process about receiving information in the above method can be the process that the processor receives the input above information. When the processor receives the input information, the transceiver receives the above information and inputs the processor. Further, after the transceiver receives the above information, the above information can need to be processed further, and then inputs the processor.

[0334] As shown in FIG. 11, the communication apparatus includes one or more processors 1120 and a transceiver 1110. FIG. 11 is another structural schematic diagram of the communication apparatus provided by the embodiment of the present application.

[0335] In some embodiments of the present application, the communication apparatus can be used to execute the steps or methods or functions executed by the first communication apparatus, for example, the processor 1120 can be used to execute the functions or steps implemented by the processing module 1001 shown in FIG. 10, and the transceiver 1110 can be used to execute the functions or steps implemented by the transceiver module 1002 shown in FIG. 10. The specific description of the processor 1120 and the transceiver 1110 can refer to the method embodiments shown in FIG. 10 or the above, which will not be described in detail here.

[0336] In some embodiments of the present application, the communication apparatus can be used to execute the steps or methods or functions executed by the first communication apparatus, for example, the processor 1120 can be used to execute the functions or steps implemented by the processing module 1001 shown in FIG. 10, and the transceiver 1110 can be used to execute the functions or steps implemented by the transceiver module 1002 shown in FIG. 10. The specific description of the processor 1120 and the transceiver 1110 can refer to the method embodiments shown in FIG. 10 or the above, which will not be described in detail here.

[0337] In the various implementations of the communication apparatus shown in FIG. 11, the transceiver can include a receiver for performing the functions (or operations) of receiving and a transmitter for performing the functions (or operations) of transmitting. The transceiver is configured to communicate with other devices / apparatuses via a transmission medium.

[0338] Optionally, the communication apparatus can further include one or more memories 1130 for storing program instructions and / or data. The memory 1130 is coupled to the processor 1120. The coupling between the embodiments of the present application is an indirect coupling or communication connection between the communication apparatus, units or modules, which can be electrical, mechanical or other form, for information interaction between the communication apparatus, units or modules. The processor 1120 can operate in cooperation with the memory 1130. The processor 1120 can execute the program instructions stored in the memory 1130. Optionally, at least one of the one or more memories can be included in the processor.

[0339] The specific connection medium between the transceiver 1110, the processor 1120 and the memory 1130 in the embodiments of the present application is not limited. In FIG. 11, the memory 1130, the processor 1120 and the transceiver 1110 are connected through the bus 1140, which is represented by a thick line in FIG. 11, and the connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into address bus, data bus, control bus, etc. For convenience of representation, only one thick line is used in FIG. 11, but it does not mean that there is only one bus or only one type of bus.

[0340] In the embodiments of the present application, the processor can be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor, etc.

[0341] In the embodiments of the present application, the memory can include, but is not limited to, a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), a random access memory (RAM), an erasable programmable ROM (EPROM), a read-only memory (ROM), a compact disc read-only memory (CD-ROM), and the like. The memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures and can be read and / or written by a computer (such as the communication device shown in the present application and the like). The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing program instructions and / or data.

[0342] The processor 1120 is mainly used for processing communication protocols and communication data, controlling the whole communication device, executing software programs, and processing data of the software programs. The memory 1130 is mainly used for storing software programs and data. The transceiver 1110 can include a control circuit and an antenna, and the control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input and output devices, such as touch screens, display screens, keyboards, and the like, are mainly used for receiving user input data and outputting data to users.

[0343] When the communication device is powered on, the processor 1120 can read the software program in the memory 1130, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1120 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1120. The processor 1120 converts the baseband signal into data and processes the data.

[0344] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor performing baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication device.

[0345] The communication apparatus shown in the embodiments of the present application can also have more components than those shown in FIG. 11, and the embodiments of the present application do not limit this. The method performed by the processor and the transceiver shown above is only an example, and the steps actually performed by the processor and the transceiver can refer to the method described above.

[0346] In another possible implementation, in the communication apparatus shown in FIG. 10, the processing module 1001 can be one or more logic circuits, and the transceiving module 1002 can be an input / output interface, also referred to as a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiving module 1002 can also be a sending module and a receiving module, the sending module can be an output interface, and the receiving module can be an input interface, and the sending module and the receiving module are integrated in one module, for example, an input / output interface. As shown in FIG. 12, the communication apparatus shown in FIG. 12 includes a logic circuit 1201 and an interface 1202. FIG. 12 is another structural schematic diagram of the communication apparatus provided by the embodiments of the present application. That is, the above processing module 1001 can be implemented by the logic circuit 1201, and the transceiving module 1002 can be implemented by the interface 1202. The logic circuit 1201 can be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface 1202 can be a communication interface, an input / output interface, a pin, etc. For example, FIG. 12 is a chip with the above communication apparatus as an example, which includes the logic circuit 1201 and the interface 1202.

[0347] In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The embodiments of the present application do not limit the specific connection mode of the logic circuit and the interface. For example, the logic circuit 1201 can be used to perform the functions or steps implemented by the processing module 1001 shown in FIG. 10, and the interface 1202 can be used to perform the functions or steps implemented by the transceiving module 1002 shown in FIG. 10. For specific description of the logic circuit 1201 and the interface 1202, refer to the method embodiments shown in FIG. 10 or the above description, which will not be described in detail here.

[0348] The communication apparatus shown in the embodiments of the present application can implement the method provided by the embodiments of the present application in the form of hardware, or implement the method provided by the embodiments of the present application in the form of software, etc., and the embodiments of the present application do not limit this.

[0349] In addition, the embodiments of the present application also provide a communication system, which includes a first communication apparatus and a second communication apparatus, and the first communication apparatus and the second communication apparatus can be used to perform the method in any of the above embodiments.

[0350] The present application also provides a computer program for implementing the operations and / or processes performed by each communication apparatus in the method provided by the present application.

[0351] The application further provides a computer readable storage medium, wherein computer code is stored in the computer readable storage medium, and when the computer code is run on a computer, the computer code causes the computer to perform operations and / or processes performed by each communication device in the method provided by the application.

[0352] The application further provides a computer program product, wherein the computer program product comprises computer code or a computer program, and when the computer code or the computer program is run on a computer, the computer code or the computer program causes operations and / or processes performed by each communication device in the method provided by the application to be performed.

[0353] In several embodiments provided by the application, it should be understood that the disclosed system, communication device and method can be implemented in other manners. For example, the embodiments of the communication device described above are merely schematic; for example, the division of the modules is merely a logical function division; an actual implementation can be another division manner; for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection between the modules can be indirect coupling or communication connection through some interfaces, communication devices or modules, and can also be electrical, mechanical or other forms of connection. The modules shown as separate components can or can not be physical separate components, and the components shown as modules can or can not be physical modules, i.e., can be located in one place or distributed on a plurality of network modules. Some or all of the modules can be selected according to actual needs to implement the technical effects of the solutions provided by the embodiments of the application.

[0354] In addition, each functional module in each embodiment of the application can be integrated in a processing module, or each module can exist physically separately, or two or more modules can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software functional module.

[0355] The integrated module, if implemented in the form of a software function module and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0356] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: Comprising: transmitting or receiving an orthogonal frequency division multiplexing, OFDM, symbol according to a subcarrier plan corresponding to a first bandwidth; the subcarrier plan corresponding to the first bandwidth comprises a plurality of 106-tone discrete resource units, DRUs; in each of the plurality of 106-tone DRUs, a difference between indexes of any two adjacent subcarriers in the 106-tone DRU is n times of m, the m is an integer greater than 4, and the n is an integer greater than or equal to 1; in each of the plurality of 106-tone DRUs, a difference between indexes of each pilot subcarrier and an adjacent subcarrier is greater than 13, or in each of the plurality of 106-tone DRUs, only the pilot subcarrier is within a 1MHz range adjacent to the pilot subcarrier.

2. The method of claim 1, wherein, the plurality of 106-tone DRUs comprises 106-tone DRU1 to 106-tone DRU8, and the 106-tone DRU1 to the 106-tone DRU8 satisfy one or more of the following: the 106-tone DRU1 comprises four pilot subcarriers with indexes of -405, -181, 147 and 371; or the 106-tone DRU2 comprises four pilot subcarriers with indexes of -281, -57, 47 and 271; or the 106-tone DRU3 comprises four pilot subcarriers with indexes of -379, -155, 173 and 397; or the 106-tone DRU4 comprises four pilot subcarriers with indexes of -255, -31, 73 and 297; or the 106-tone DRU5 comprises four pilot subcarriers with indexes of -454, -246, 210 and 418; or the 106-tone DRU6 comprises four pilot subcarriers with indexes of -330, -122, 110 and 318; or the 106-tone DRU7 comprises four pilot subcarriers with indexes of -428, -220, 236 and 444; or the 106-tone DRU8 comprises four pilot subcarriers with indexes of -304, -96, 136 and 344.

3. The method according to claim 1 or 2, characterized in that, the plurality of 106-tone DRUs comprises 106-tone DRU1 to 106-tone DRU8, and the 106-tone DRU1 to the 106-tone DRU8 satisfy one or more of the following: the 106-tone DRU1 comprises 106 subcarriers with indexes of [-493:8:-421, -405, -389:8:-197, -181, -165:8:-45, 11:8:131, 147, 163:8:355, 371, 387:8:459]; or The 106-tone DRU 2 contains 106 subcarriers with indexes [-481:8:-297, -281, -265:8:-73, -57, -41:8:-33, 23:8:31, 47, 63:8:255, 271, 287:8:471]; or, The 106-tone DRU 3 contains 106 subcarriers with indexes [-467:8:-395, -379, -363:8:-171, -155, -139:8:-19, 37:8:157, 173, 189:8:381, 397, 413:8:485]; or, The 106-tone DRU 4 contains 106 subcarriers with indexes [-455:8:-271, -255, -239:8:-47, -31, -15:8:-7, 49:8:57, 73, 89:8:281, 297, 313:8:497]; or, The 106-tone DRU 5 contains 106 subcarriers with indexes [-494:8:-470, -454, -438:8:-262, -246, -230:8:-46, 10:8:194, 210, 226:8:402, 418, 434:8:458]; or, The 106-tone DRU 6 contains 106 subcarriers with indexes [-482:8:-346, -330, -314:8:-138, -122, -106, -98:8:-3422:8:94, 110, 126, 134:8:302, 318, 334:8:470]; or, The 106-tone DRU 7 contains 106 subcarriers with indexes [-468:8:-444, -428, -412:8:-236, -220, -204:8:-20, 36:8:220, 236, 252:8:428, 444, 460:8:484]; or, The 106-tone DRU 8 contains 106 subcarriers with indexes [-456:8:-320, -304, -288:8:-112, -96, -80, -72:8:-848:8:120, 136, 152, 160:8:328, 344, 360:8:496].

4. The method according to any one of claims 1 to 3, characterized in that, The subcarrier arrangement corresponding to the first bandwidth contains a plurality of 52-tone DRUs, any two adjacent subcarriers in each 52-tone DRU of the plurality of 52-tone DRUs have an index difference that is a multiple of n, and an index difference of at least some adjacent subcarriers in each 52-tone DRU is not an integer multiple of 16.

5. The method of claim 4, wherein, The plurality of 52-tone DRUs includes 52-tone DRU1 to 52-tone DRU16, and the 52-tone DRU1 to the 52-tone DRU16 satisfy one or more of the following: the 52 subcarriers of the 52-tone DRU1 comprise the indices [-477:16:-429, -405:16:-197, -157:16:-45, 11:16:123, 163:16:371, 395:16:443]; or, the 52 subcarriers of the 52-tone DRU2 comprise the indices [-485:16:-421, -381:16:-205, -181:16:-53, 19:16:147, 171:16:347, 387:16:451]; or, the 52 subcarriers of the 52-tone DRU3 comprise the indices [-465:16:-305, -281:16:-73, -33, 23, 63:16:271, 295:16:455]; or, the 52 subcarriers of the 52-tone DRU4 comprise the indices [-473:16:-297, -257:16:-81, -57, -41, 31, 47, 71:16:247, 287:16:463]; or, the 52 subcarriers of the 52-tone DRU5 comprise the indices [-451:16:-403, -379:16:-171, -131:16:-19, 37:16:149, 189:16:397, 421:16:469]; or, the 52 subcarriers of the 52-tone DRU6 comprise the indices [-459:16:-395, -355:16:-179, -155:16:-27, 45:16:173, 197:16:373, 413:16:477]; or, the 52 subcarriers of the 52-tone DRU7 comprise the indices [-439:16:-279, -255:16:-47, -7, 49, 89:16:297, 321:16:481]; or, the 52 subcarriers of the 52-tone DRU8 comprise the indices [-447:16:-271, -231:16:-55, -31, -15, 57, 73, 97:16:273, 313:16:489]; or, the 52 subcarriers of the 52-tone DRU9 comprise the indices [-478, -454:16:-262, -222:16:-46, 10:16:186, 226:16:418, 442]; or, the 52 subcarriers of the 52-tone DRU10 comprise the indices [-486, -470, -430:16:-270, -246:16:-54, 18:16:210, 234:16:402, 434, 450]; or, 52-tone DRU11 contains 52 subcarriers with indices [-466:16:-354,-330:16:-138,-98:16:-34,22:16:86,126:16:318,342:16:454]; or, 52-tone DRU12 contains 52 subcarriers with indices [-474:16:-346,-306:16:-146,-122:16:-42,30:16:110,134:16:294,334:16:462]; or, 52-tone DRU13 contains 52 subcarriers with indices [-452,-428:16:-236,-196:16:-20,36:16:212,252:16:444,468]; or, 52-tone DRU14 contains 52 subcarriers with indices [-460,-444,-404:16:-244,-220:16:-28,44:16:236,260:16:420,460,476]; or, 52-tone DRU15 contains 52 subcarriers with indices [-440:16:-328,-304:16:-112,-72:16:-8,48:16:112,152:16:344,368:16:480]; or, 52-tone DRU16 contains 52 subcarriers with indices [-448:16:-320,-280:16:-120,-96:16:-16,56:16:136,160:16:320,360:16:488].

6. The method according to claim 4 or 5, characterized in that, The plurality of 52-tone DRUs includes 52-tone DRU1 to 52-tone DRU16, which satisfy one or more of the following: 52-tone DRU1 contains 4 pilot subcarriers with indices -405, -293, 259, and 371; or, 52-tone DRU2 contains 4 pilot subcarriers with indices -181, -69, 35, and 147; or, 52-tone DRU3 contains 4 pilot subcarriers with indices -281, -169, 159, and 271; or, 52-tone DRU4 contains 4 pilot subcarriers with indices -393, -57, 47, and 383; or, 52-tone DRU5 contains 4 pilot subcarriers with indices -379, -267, 285, and 397; or, 52-tone DRU6 contains 4 pilot subcarriers with indices -155, -43, 61, and 173; or, 52-tone DRU7 contains 4 pilot subcarriers with indices -255, -143, 185, and 297; or, 52-tone DRU8 includes four pilot subcarriers with indices -367, -31, 73, and 409; or, 52-tone DRU9 includes four pilot subcarriers with indices -454, -342, 306, and 418; or, 52-tone DRU10 includes four pilot subcarriers with indices -246, -134, 98, and 210; or, 52-tone DRU11 includes four pilot subcarriers with indices -330, -234, 222, and 318; or, 52-tone DRU12 includes four pilot subcarriers with indices -442, -122, 110, and 430; or, 52-tone DRU13 includes four pilot subcarriers with indices -428, -316, 332, and 444; or, 52-tone DRU14 includes four pilot subcarriers with indices -220, -108, 124, and 236; or, 52-tone DRU15 includes four pilot subcarriers with indices -304, -208, 248, and 344; or, 52-tone DRU16 includes four pilot subcarriers with indices -416, -96, 136, and 456.

7. The method according to any one of claims 1 to 6, characterized in that, The first bandwidth corresponds to a subcarrier plan including 242-tone DRU1 and / or 242-tone DRU2; The 242-tone DRU1 includes 242 subcarriers with indices [-497:4:-17, 7:4:487]; The 242-tone DRU2 includes 242 subcarriers with indices [-487:4:-7, 17:4:497].

8. The method according to any one of claims 1 to 7, characterized in that, The m is 6 or 8.

9. A communications device, characterized by A module for performing the method of any of claims 1-8.

10. A communications device, characterized by A processor for performing the method of any of claims 1-8.

11. A communications device, characterized by A logic circuit and an interface coupled to the logic circuit; The interface is for inputting and / or outputting information, and the logic circuit is for performing the method of any of claims 1-8.

12. A computer-readable storage medium, characterized in that, A computer readable storage medium for storing a computer program that, when executed, performs the method of any of claims 1-8.

13. A computer program product, characterised in that, A computer program product that, when executed, performs the method of any of claims 1-8.

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